--- /dev/null
+diff -Nrup a/fs/yaffs2/devextras.h b/fs/yaffs2/devextras.h
+--- a/fs/yaffs2/devextras.h 2010-10-03 17:48:22.704000363 +0300
++++ b/fs/yaffs2/devextras.h 2010-10-03 18:03:47.537000367 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -24,6 +24,8 @@
+ #define __EXTRAS_H__
+
+
++#include "yportenv.h"
++
+ #if !(defined __KERNEL__)
+
+ /* Definition of types */
+@@ -33,103 +35,6 @@ typedef unsigned __u32;
+
+ #endif
+
+-/*
+- * This is a simple doubly linked list implementation that matches the
+- * way the Linux kernel doubly linked list implementation works.
+- */
+-
+-struct ylist_head {
+- struct ylist_head *next; /* next in chain */
+- struct ylist_head *prev; /* previous in chain */
+-};
+-
+-
+-/* Initialise a static list */
+-#define YLIST_HEAD(name) \
+-struct ylist_head name = { &(name), &(name)}
+-
+-
+-
+-/* Initialise a list head to an empty list */
+-#define YINIT_LIST_HEAD(p) \
+-do { \
+- (p)->next = (p);\
+- (p)->prev = (p); \
+-} while (0)
+-
+-
+-/* Add an element to a list */
+-static __inline__ void ylist_add(struct ylist_head *newEntry,
+- struct ylist_head *list)
+-{
+- struct ylist_head *listNext = list->next;
+-
+- list->next = newEntry;
+- newEntry->prev = list;
+- newEntry->next = listNext;
+- listNext->prev = newEntry;
+-
+-}
+-
+-static __inline__ void ylist_add_tail(struct ylist_head *newEntry,
+- struct ylist_head *list)
+-{
+- struct ylist_head *listPrev = list->prev;
+-
+- list->prev = newEntry;
+- newEntry->next = list;
+- newEntry->prev = listPrev;
+- listPrev->next = newEntry;
+-
+-}
+-
+-
+-/* Take an element out of its current list, with or without
+- * reinitialising the links.of the entry*/
+-static __inline__ void ylist_del(struct ylist_head *entry)
+-{
+- struct ylist_head *listNext = entry->next;
+- struct ylist_head *listPrev = entry->prev;
+-
+- listNext->prev = listPrev;
+- listPrev->next = listNext;
+-
+-}
+-
+-static __inline__ void ylist_del_init(struct ylist_head *entry)
+-{
+- ylist_del(entry);
+- entry->next = entry->prev = entry;
+-}
+-
+-
+-/* Test if the list is empty */
+-static __inline__ int ylist_empty(struct ylist_head *entry)
+-{
+- return (entry->next == entry);
+-}
+-
+-
+-/* ylist_entry takes a pointer to a list entry and offsets it to that
+- * we can find a pointer to the object it is embedded in.
+- */
+-
+-
+-#define ylist_entry(entry, type, member) \
+- ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
+-
+-
+-/* ylist_for_each and list_for_each_safe iterate over lists.
+- * ylist_for_each_safe uses temporary storage to make the list delete safe
+- */
+-
+-#define ylist_for_each(itervar, list) \
+- for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
+-
+-#define ylist_for_each_safe(itervar, saveVar, list) \
+- for (itervar = (list)->next, saveVar = (list)->next->next; \
+- itervar != (list); itervar = saveVar, saveVar = saveVar->next)
+-
+
+ #if !(defined __KERNEL__)
+
+diff -Nrup a/fs/yaffs2/Kconfig b/fs/yaffs2/Kconfig
+--- a/fs/yaffs2/Kconfig 2010-10-03 17:48:22.704000363 +0300
++++ b/fs/yaffs2/Kconfig 2010-10-03 18:03:47.461000368 +0300
+@@ -90,23 +90,15 @@ config YAFFS_AUTO_YAFFS2
+
+ If unsure, say Y.
+
+-config YAFFS_DISABLE_LAZY_LOAD
+- bool "Disable lazy loading"
+- depends on YAFFS_YAFFS2
++config YAFFS_DISABLE_TAGS_ECC
++ bool "Disable YAFFS from doing ECC on tags by default"
++ depends on YAFFS_FS && YAFFS_YAFFS2
+ default n
+ help
+- "Lazy loading" defers loading file details until they are
+- required. This saves mount time, but makes the first look-up
+- a bit longer.
+-
+- Lazy loading will only happen if enabled by this option being 'n'
+- and if the appropriate tags are available, else yaffs2 will
+- automatically fall back to immediate loading and do the right
+- thing.
+-
+- Lazy laoding will be required by checkpointing.
+-
+- Setting this to 'y' will disable lazy loading.
++ This defaults Yaffs to using its own ECC calculations on tags instead of
++ just relying on the MTD.
++ This behavior can also be overridden with tags_ecc_on and
++ tags_ecc_off mount options.
+
+ If unsure, say N.
+
+@@ -154,3 +146,45 @@ config YAFFS_SHORT_NAMES_IN_RAM
+ but makes look-ups faster.
+
+ If unsure, say Y.
++
++config YAFFS_EMPTY_LOST_AND_FOUND
++ bool "Empty lost and found on boot"
++ depends on YAFFS_FS
++ default n
++ help
++ If this is enabled then the contents of lost and found is
++ automatically dumped at mount.
++
++ If unsure, say N.
++
++config YAFFS_DISABLE_BLOCK_REFRESHING
++ bool "Disable yaffs2 block refreshing"
++ depends on YAFFS_FS
++ default n
++ help
++ If this is set, then block refreshing is disabled.
++ Block refreshing infrequently refreshes the oldest block in
++ a yaffs2 file system. This mechanism helps to refresh flash to
++ mitigate against data loss. This is particularly useful for MLC.
++
++ If unsure, say N.
++
++config YAFFS_DISABLE_BACKGROUND
++ bool "Disable yaffs2 background processing"
++ depends on YAFFS_FS
++ default n
++ help
++ If this is set, then background processing is disabled.
++ Background processing makes many foreground activities faster.
++
++ If unsure, say N.
++
++config YAFFS_XATTR
++ bool "Enable yaffs2 xattr support"
++ depends on YAFFS_FS
++ default y
++ help
++ If this is set then yaffs2 will provide xattr support.
++ If unsure, say Y.
++
++
+diff -Nrup a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile
+--- a/fs/yaffs2/Makefile 2010-10-03 17:48:22.705000363 +0300
++++ b/fs/yaffs2/Makefile 2010-10-03 18:03:47.460000369 +0300
+@@ -4,7 +4,14 @@
+
+ obj-$(CONFIG_YAFFS_FS) += yaffs.o
+
+-yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o
+-yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o
++yaffs-y := yaffs_ecc.o yaffs_vfs_glue.o yaffs_guts.o yaffs_checkptrw.o
++yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o
+ yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o
+ yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
++yaffs-y += yaffs_nameval.o
++yaffs-y += yaffs_allocator.o
++yaffs-y += yaffs_yaffs1.o
++yaffs-y += yaffs_yaffs2.o
++yaffs-y += yaffs_bitmap.o
++yaffs-y += yaffs_verify.o
++
+diff -Nrup a/fs/yaffs2/moduleconfig.h b/fs/yaffs2/moduleconfig.h
+--- a/fs/yaffs2/moduleconfig.h 2010-10-03 17:48:22.705000363 +0300
++++ b/fs/yaffs2/moduleconfig.h 2010-10-03 18:03:47.538000366 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Martin Fouts <Martin.Fouts@palmsource.com>
+@@ -29,22 +29,43 @@
+ /* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
+ /* #define CONFIG_YAFFS_DOES_ECC */
+
++/* Default: Selected */
++/* Meaning: Yaffs does its own ECC on tags for packed tags rather than use mtd */
++#define CONFIG_YAFFS_DOES_TAGS_ECC
++
+ /* Default: Not selected */
+ /* Meaning: ECC byte order is 'wrong'. Only meaningful if */
+ /* CONFIG_YAFFS_DOES_ECC is set */
+ /* #define CONFIG_YAFFS_ECC_WRONG_ORDER */
+
+-/* Default: Selected */
+-/* Meaning: Disables testing whether chunks are erased before writing to them*/
+-#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
++/* Default: Not selected */
++/* Meaning: Always test whether chunks are erased before writing to them.
++ Use during mtd debugging and init. */
++/* #define CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED */
++
++/* Default: Not Selected */
++/* Meaning: At mount automatically empty all files from lost and found. */
++/* This is done to fix an old problem where rmdir was not checking for an */
++/* empty directory. This can also be achieved with a mount option. */
++#define CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
+
+ /* Default: Selected */
+ /* Meaning: Cache short names, taking more RAM, but faster look-ups */
+ #define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+
+-/* Default: 10 */
+-/* Meaning: set the count of blocks to reserve for checkpointing */
+-#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
++/* Default: Unselected */
++/* Meaning: Select to disable block refreshing. */
++/* Block Refreshing periodically rewrites the oldest block. */
++/* #define CONFIG_DISABLE_BLOCK_REFRESHING */
++
++/* Default: Unselected */
++/* Meaning: Select to disable background processing */
++/* #define CONFIG_DISABLE_BACKGROUND */
++
++
++/* Default: Selected */
++/* Meaning: Enable XATTR support */
++#define CONFIG_YAFFS_XATTR
+
+ /*
+ Older-style on-NAND data format has a "pageStatus" byte to record
+diff -Nrup a/fs/yaffs2/yaffs_allocator.c b/fs/yaffs2/yaffs_allocator.c
+--- a/fs/yaffs2/yaffs_allocator.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_allocator.c 2010-10-03 18:03:47.504000356 +0300
+@@ -0,0 +1,409 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++
++#include "yaffs_allocator.h"
++#include "yaffs_guts.h"
++#include "yaffs_trace.h"
++#include "yportenv.h"
++
++#ifdef CONFIG_YAFFS_YMALLOC_ALLOCATOR
++
++void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ dev = dev;
++}
++
++void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ dev = dev;
++}
++
++yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
++{
++ return (yaffs_Tnode *)YMALLOC(dev->tnodeSize);
++}
++
++void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
++{
++ dev = dev;
++ YFREE(tn);
++}
++
++void yaffs_InitialiseRawObjects(yaffs_Device *dev)
++{
++ dev = dev;
++}
++
++void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
++{
++ dev = dev;
++}
++
++yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
++{
++ dev = dev;
++ return (yaffs_Object *) YMALLOC(sizeof(yaffs_Object));
++}
++
++
++void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
++{
++
++ dev = dev;
++ YFREE(obj);
++}
++
++#else
++
++struct yaffs_TnodeList_struct {
++ struct yaffs_TnodeList_struct *next;
++ yaffs_Tnode *tnodes;
++};
++
++typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
++
++struct yaffs_ObjectList_struct {
++ yaffs_Object *objects;
++ struct yaffs_ObjectList_struct *next;
++};
++
++typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
++
++
++struct yaffs_AllocatorStruct {
++ int nTnodesCreated;
++ yaffs_Tnode *freeTnodes;
++ int nFreeTnodes;
++ yaffs_TnodeList *allocatedTnodeList;
++
++ int nObjectsCreated;
++ yaffs_Object *freeObjects;
++ int nFreeObjects;
++
++ yaffs_ObjectList *allocatedObjectList;
++};
++
++typedef struct yaffs_AllocatorStruct yaffs_Allocator;
++
++
++static void yaffs_DeinitialiseRawTnodes(yaffs_Device *dev)
++{
++
++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++
++ yaffs_TnodeList *tmp;
++
++ if(!allocator){
++ YBUG();
++ return;
++ }
++
++ while (allocator->allocatedTnodeList) {
++ tmp = allocator->allocatedTnodeList->next;
++
++ YFREE(allocator->allocatedTnodeList->tnodes);
++ YFREE(allocator->allocatedTnodeList);
++ allocator->allocatedTnodeList = tmp;
++
++ }
++
++ allocator->freeTnodes = NULL;
++ allocator->nFreeTnodes = 0;
++ allocator->nTnodesCreated = 0;
++}
++
++static void yaffs_InitialiseRawTnodes(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(allocator){
++ allocator->allocatedTnodeList = NULL;
++ allocator->freeTnodes = NULL;
++ allocator->nFreeTnodes = 0;
++ allocator->nTnodesCreated = 0;
++ } else
++ YBUG();
++}
++
++static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
++{
++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++ int i;
++ yaffs_Tnode *newTnodes;
++ __u8 *mem;
++ yaffs_Tnode *curr;
++ yaffs_Tnode *next;
++ yaffs_TnodeList *tnl;
++
++ if(!allocator){
++ YBUG();
++ return YAFFS_FAIL;
++ }
++
++ if (nTnodes < 1)
++ return YAFFS_OK;
++
++
++ /* make these things */
++
++ newTnodes = YMALLOC(nTnodes * dev->tnodeSize);
++ mem = (__u8 *)newTnodes;
++
++ if (!newTnodes) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ /* New hookup for wide tnodes */
++ for (i = 0; i < nTnodes - 1; i++) {
++ curr = (yaffs_Tnode *) &mem[i * dev->tnodeSize];
++ next = (yaffs_Tnode *) &mem[(i+1) * dev->tnodeSize];
++ curr->internal[0] = next;
++ }
++
++ curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * dev->tnodeSize];
++ curr->internal[0] = allocator->freeTnodes;
++ allocator->freeTnodes = (yaffs_Tnode *)mem;
++
++ allocator->nFreeTnodes += nTnodes;
++ allocator->nTnodesCreated += nTnodes;
++
++ /* Now add this bunch of tnodes to a list for freeing up.
++ * NB If we can't add this to the management list it isn't fatal
++ * but it just means we can't free this bunch of tnodes later.
++ */
++
++ tnl = YMALLOC(sizeof(yaffs_TnodeList));
++ if (!tnl) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs: Could not add tnodes to management list" TENDSTR)));
++ return YAFFS_FAIL;
++ } else {
++ tnl->tnodes = newTnodes;
++ tnl->next = allocator->allocatedTnodeList;
++ allocator->allocatedTnodeList = tnl;
++ }
++
++ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
++
++ return YAFFS_OK;
++}
++
++
++yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++ yaffs_Tnode *tn = NULL;
++
++ if(!allocator){
++ YBUG();
++ return NULL;
++ }
++
++ /* If there are none left make more */
++ if (!allocator->freeTnodes)
++ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
++
++ if (allocator->freeTnodes) {
++ tn = allocator->freeTnodes;
++ allocator->freeTnodes = allocator->freeTnodes->internal[0];
++ allocator->nFreeTnodes--;
++ }
++
++ return tn;
++}
++
++/* FreeTnode frees up a tnode and puts it back on the free list */
++void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(!allocator){
++ YBUG();
++ return;
++ }
++
++ if (tn) {
++ tn->internal[0] = allocator->freeTnodes;
++ allocator->freeTnodes = tn;
++ allocator->nFreeTnodes++;
++ }
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++}
++
++
++
++static void yaffs_InitialiseRawObjects(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(allocator) {
++ allocator->allocatedObjectList = NULL;
++ allocator->freeObjects = NULL;
++ allocator->nFreeObjects = 0;
++ } else
++ YBUG();
++}
++
++static void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++ yaffs_ObjectList *tmp;
++
++ if(!allocator){
++ YBUG();
++ return;
++ }
++
++ while (allocator->allocatedObjectList) {
++ tmp = allocator->allocatedObjectList->next;
++ YFREE(allocator->allocatedObjectList->objects);
++ YFREE(allocator->allocatedObjectList);
++
++ allocator->allocatedObjectList = tmp;
++ }
++
++ allocator->freeObjects = NULL;
++ allocator->nFreeObjects = 0;
++ allocator->nObjectsCreated = 0;
++}
++
++
++static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++
++ int i;
++ yaffs_Object *newObjects;
++ yaffs_ObjectList *list;
++
++ if(!allocator){
++ YBUG();
++ return YAFFS_FAIL;
++ }
++
++ if (nObjects < 1)
++ return YAFFS_OK;
++
++ /* make these things */
++ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
++ list = YMALLOC(sizeof(yaffs_ObjectList));
++
++ if (!newObjects || !list) {
++ if (newObjects){
++ YFREE(newObjects);
++ newObjects = NULL;
++ }
++ if (list){
++ YFREE(list);
++ list = NULL;
++ }
++ T(YAFFS_TRACE_ALLOCATE,
++ (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ /* Hook them into the free list */
++ for (i = 0; i < nObjects - 1; i++) {
++ newObjects[i].siblings.next =
++ (struct ylist_head *)(&newObjects[i + 1]);
++ }
++
++ newObjects[nObjects - 1].siblings.next = (void *)allocator->freeObjects;
++ allocator->freeObjects = newObjects;
++ allocator->nFreeObjects += nObjects;
++ allocator->nObjectsCreated += nObjects;
++
++ /* Now add this bunch of Objects to a list for freeing up. */
++
++ list->objects = newObjects;
++ list->next = allocator->allocatedObjectList;
++ allocator->allocatedObjectList = list;
++
++ return YAFFS_OK;
++}
++
++yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
++{
++ yaffs_Object *obj = NULL;
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(!allocator) {
++ YBUG();
++ return obj;
++ }
++
++ /* If there are none left make more */
++ if (!allocator->freeObjects)
++ yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
++
++ if (allocator->freeObjects) {
++ obj = allocator->freeObjects;
++ allocator->freeObjects =
++ (yaffs_Object *) (allocator->freeObjects->siblings.next);
++ allocator->nFreeObjects--;
++ }
++
++ return obj;
++}
++
++
++void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
++{
++
++ yaffs_Allocator *allocator = dev->allocator;
++
++ if(!allocator)
++ YBUG();
++ else {
++ /* Link into the free list. */
++ obj->siblings.next = (struct ylist_head *)(allocator->freeObjects);
++ allocator->freeObjects = obj;
++ allocator->nFreeObjects++;
++ }
++}
++
++void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ if(dev->allocator){
++ yaffs_DeinitialiseRawTnodes(dev);
++ yaffs_DeinitialiseRawObjects(dev);
++
++ YFREE(dev->allocator);
++ dev->allocator=NULL;
++ } else
++ YBUG();
++}
++
++void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator;
++
++ if(!dev->allocator){
++ allocator = YMALLOC(sizeof(yaffs_Allocator));
++ if(allocator){
++ dev->allocator = allocator;
++ yaffs_InitialiseRawTnodes(dev);
++ yaffs_InitialiseRawObjects(dev);
++ }
++ } else
++ YBUG();
++}
++
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_allocator.h b/fs/yaffs2/yaffs_allocator.h
+--- a/fs/yaffs2/yaffs_allocator.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_allocator.h 2010-10-03 18:03:47.538000366 +0300
+@@ -0,0 +1,30 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_ALLOCATOR_H__
++#define __YAFFS_ALLOCATOR_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev);
++void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev);
++
++yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev);
++void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn);
++
++yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev);
++void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj);
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_bitmap.c b/fs/yaffs2/yaffs_bitmap.c
+--- a/fs/yaffs2/yaffs_bitmap.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_bitmap.c 2010-10-03 18:03:47.505000364 +0300
+@@ -0,0 +1,105 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include "yaffs_bitmap.h"
++#include "yaffs_trace.h"
++/*
++ * Chunk bitmap manipulations
++ */
++
++static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
++{
++ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
++ blk));
++ YBUG();
++ }
++ return dev->chunkBits +
++ (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
++}
++
++void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
++{
++ if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
++ chunk < 0 || chunk >= dev->param.nChunksPerBlock) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
++ blk, chunk));
++ YBUG();
++ }
++}
++
++void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ memset(blkBits, 0, dev->chunkBitmapStride);
++}
++
++void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ yaffs_VerifyChunkBitId(dev, blk, chunk);
++
++ blkBits[chunk / 8] &= ~(1 << (chunk & 7));
++}
++
++void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++
++ yaffs_VerifyChunkBitId(dev, blk, chunk);
++
++ blkBits[chunk / 8] |= (1 << (chunk & 7));
++}
++
++int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ yaffs_VerifyChunkBitId(dev, blk, chunk);
++
++ return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
++}
++
++int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ int i;
++ for (i = 0; i < dev->chunkBitmapStride; i++) {
++ if (*blkBits)
++ return 1;
++ blkBits++;
++ }
++ return 0;
++}
++
++int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
++{
++ __u8 *blkBits = yaffs_BlockBits(dev, blk);
++ int i;
++ int n = 0;
++ for (i = 0; i < dev->chunkBitmapStride; i++) {
++ __u8 x = *blkBits;
++ while (x) {
++ if (x & 1)
++ n++;
++ x >>= 1;
++ }
++
++ blkBits++;
++ }
++ return n;
++}
++
+diff -Nrup a/fs/yaffs2/yaffs_bitmap.h b/fs/yaffs2/yaffs_bitmap.h
+--- a/fs/yaffs2/yaffs_bitmap.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_bitmap.h 2010-10-03 18:03:47.539000363 +0300
+@@ -0,0 +1,31 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ * Chunk bitmap manipulations
++ */
++
++#ifndef __YAFFS_BITMAP_H__
++#define __YAFFS_BITMAP_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk);
++void yaffs_ClearChunkBits(yaffs_Device *dev, int blk);
++void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk);
++void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk);
++int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk);
++int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk);
++int yaffs_CountChunkBits(yaffs_Device *dev, int blk);
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c
+--- a/fs/yaffs2/yaffs_checkptrw.c 2010-10-03 17:48:22.706000363 +0300
++++ b/fs/yaffs2/yaffs_checkptrw.c 2010-10-03 18:03:47.505000364 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -11,16 +11,12 @@
+ * published by the Free Software Foundation.
+ */
+
+-const char *yaffs_checkptrw_c_version =
+- "$Id: yaffs_checkptrw.c,v 1.18 2009-03-06 17:20:49 wookey Exp $";
+-
+-
+ #include "yaffs_checkptrw.h"
+ #include "yaffs_getblockinfo.h"
+
+-static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
++static int yaffs2_CheckpointSpaceOk(yaffs_Device *dev)
+ {
+- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
++ int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
+
+ T(YAFFS_TRACE_CHECKPOINT,
+ (TSTR("checkpt blocks available = %d" TENDSTR),
+@@ -30,11 +26,11 @@ static int yaffs_CheckpointSpaceOk(yaffs
+ }
+
+
+-static int yaffs_CheckpointErase(yaffs_Device *dev)
++static int yaffs2_CheckpointErase(yaffs_Device *dev)
+ {
+ int i;
+
+- if (!dev->eraseBlockInNAND)
++ if (!dev->param.eraseBlockInNAND)
+ return 0;
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
+ dev->internalStartBlock, dev->internalEndBlock));
+@@ -43,12 +39,15 @@ static int yaffs_CheckpointErase(yaffs_D
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+ if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
+- if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
++
++ dev->nBlockErasures++;
++
++ if (dev->param.eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
+ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+ dev->nErasedBlocks++;
+- dev->nFreeChunks += dev->nChunksPerBlock;
++ dev->nFreeChunks += dev->param.nChunksPerBlock;
+ } else {
+- dev->markNANDBlockBad(dev, i);
++ dev->param.markNANDBlockBad(dev, i);
+ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
+ }
+ }
+@@ -60,13 +59,13 @@ static int yaffs_CheckpointErase(yaffs_D
+ }
+
+
+-static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
++static void yaffs2_CheckpointFindNextErasedBlock(yaffs_Device *dev)
+ {
+ int i;
+- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
++ int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
+ T(YAFFS_TRACE_CHECKPOINT,
+ (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
+- dev->nErasedBlocks, dev->nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
++ dev->nErasedBlocks, dev->param.nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
+
+ if (dev->checkpointNextBlock >= 0 &&
+ dev->checkpointNextBlock <= dev->internalEndBlock &&
+@@ -88,7 +87,7 @@ static void yaffs_CheckpointFindNextEras
+ dev->checkpointCurrentBlock = -1;
+ }
+
+-static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
++static void yaffs2_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
+ {
+ int i;
+ yaffs_ExtendedTags tags;
+@@ -98,10 +97,10 @@ static void yaffs_CheckpointFindNextChec
+
+ if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
+ for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
+- int chunk = i * dev->nChunksPerBlock;
++ int chunk = i * dev->param.nChunksPerBlock;
+ int realignedChunk = chunk - dev->chunkOffset;
+
+- dev->readChunkWithTagsFromNAND(dev, realignedChunk,
++ dev->param.readChunkWithTagsFromNAND(dev, realignedChunk,
+ NULL, &tags);
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
+ i, tags.objectId, tags.sequenceNumber, tags.eccResult));
+@@ -124,29 +123,29 @@ static void yaffs_CheckpointFindNextChec
+ }
+
+
+-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
++int yaffs2_CheckpointOpen(yaffs_Device *dev, int forWriting)
+ {
+
++
++ dev->checkpointOpenForWrite = forWriting;
++
+ /* Got the functions we need? */
+- if (!dev->writeChunkWithTagsToNAND ||
+- !dev->readChunkWithTagsFromNAND ||
+- !dev->eraseBlockInNAND ||
+- !dev->markNANDBlockBad)
++ if (!dev->param.writeChunkWithTagsToNAND ||
++ !dev->param.readChunkWithTagsFromNAND ||
++ !dev->param.eraseBlockInNAND ||
++ !dev->param.markNANDBlockBad)
+ return 0;
+
+- if (forWriting && !yaffs_CheckpointSpaceOk(dev))
++ if (forWriting && !yaffs2_CheckpointSpaceOk(dev))
+ return 0;
+
+ if (!dev->checkpointBuffer)
+- dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk);
++ dev->checkpointBuffer = YMALLOC_DMA(dev->param.totalBytesPerChunk);
+ if (!dev->checkpointBuffer)
+ return 0;
+
+
+ dev->checkpointPageSequence = 0;
+-
+- dev->checkpointOpenForWrite = forWriting;
+-
+ dev->checkpointByteCount = 0;
+ dev->checkpointSum = 0;
+ dev->checkpointXor = 0;
+@@ -158,7 +157,7 @@ int yaffs_CheckpointOpen(yaffs_Device *d
+ if (forWriting) {
+ memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
+ dev->checkpointByteOffset = 0;
+- return yaffs_CheckpointErase(dev);
++ return yaffs2_CheckpointErase(dev);
+ } else {
+ int i;
+ /* Set to a value that will kick off a read */
+@@ -168,6 +167,9 @@ int yaffs_CheckpointOpen(yaffs_Device *d
+ dev->blocksInCheckpoint = 0;
+ dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
+ dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
++ if(!dev->checkpointBlockList)
++ return 0;
++
+ for (i = 0; i < dev->checkpointMaxBlocks; i++)
+ dev->checkpointBlockList[i] = -1;
+ }
+@@ -175,7 +177,7 @@ int yaffs_CheckpointOpen(yaffs_Device *d
+ return 1;
+ }
+
+-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
++int yaffs2_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
+ {
+ __u32 compositeSum;
+ compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
+@@ -183,7 +185,7 @@ int yaffs_GetCheckpointSum(yaffs_Device
+ return 1;
+ }
+
+-static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
++static int yaffs2_CheckpointFlushBuffer(yaffs_Device *dev)
+ {
+ int chunk;
+ int realignedChunk;
+@@ -191,7 +193,7 @@ static int yaffs_CheckpointFlushBuffer(y
+ yaffs_ExtendedTags tags;
+
+ if (dev->checkpointCurrentBlock < 0) {
+- yaffs_CheckpointFindNextErasedBlock(dev);
++ yaffs2_CheckpointFindNextErasedBlock(dev);
+ dev->checkpointCurrentChunk = 0;
+ }
+
+@@ -211,7 +213,7 @@ static int yaffs_CheckpointFlushBuffer(y
+ dev->blocksInCheckpoint++;
+ }
+
+- chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
++ chunk = dev->checkpointCurrentBlock * dev->param.nChunksPerBlock + dev->checkpointCurrentChunk;
+
+
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
+@@ -219,12 +221,14 @@ static int yaffs_CheckpointFlushBuffer(y
+
+ realignedChunk = chunk - dev->chunkOffset;
+
+- dev->writeChunkWithTagsToNAND(dev, realignedChunk,
++ dev->nPageWrites++;
++
++ dev->param.writeChunkWithTagsToNAND(dev, realignedChunk,
+ dev->checkpointBuffer, &tags);
+ dev->checkpointByteOffset = 0;
+ dev->checkpointPageSequence++;
+ dev->checkpointCurrentChunk++;
+- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) {
++ if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock) {
+ dev->checkpointCurrentChunk = 0;
+ dev->checkpointCurrentBlock = -1;
+ }
+@@ -234,7 +238,7 @@ static int yaffs_CheckpointFlushBuffer(y
+ }
+
+
+-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
++int yaffs2_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
+ {
+ int i = 0;
+ int ok = 1;
+@@ -263,13 +267,13 @@ int yaffs_CheckpointWrite(yaffs_Device *
+
+ if (dev->checkpointByteOffset < 0 ||
+ dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
+- ok = yaffs_CheckpointFlushBuffer(dev);
++ ok = yaffs2_CheckpointFlushBuffer(dev);
+ }
+
+ return i;
+ }
+
+-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
++int yaffs2_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
+ {
+ int i = 0;
+ int ok = 1;
+@@ -294,7 +298,7 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
+
+ if (dev->checkpointCurrentBlock < 0) {
+- yaffs_CheckpointFindNextCheckpointBlock(dev);
++ yaffs2_CheckpointFindNextCheckpointBlock(dev);
+ dev->checkpointCurrentChunk = 0;
+ }
+
+@@ -302,14 +306,16 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ ok = 0;
+ else {
+ chunk = dev->checkpointCurrentBlock *
+- dev->nChunksPerBlock +
++ dev->param.nChunksPerBlock +
+ dev->checkpointCurrentChunk;
+
+ realignedChunk = chunk - dev->chunkOffset;
++
++ dev->nPageReads++;
+
+ /* read in the next chunk */
+ /* printf("read checkpoint page %d\n",dev->checkpointPage); */
+- dev->readChunkWithTagsFromNAND(dev,
++ dev->param.readChunkWithTagsFromNAND(dev,
+ realignedChunk,
+ dev->checkpointBuffer,
+ &tags);
+@@ -323,7 +329,7 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ dev->checkpointPageSequence++;
+ dev->checkpointCurrentChunk++;
+
+- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
++ if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock)
+ dev->checkpointCurrentBlock = -1;
+ }
+ }
+@@ -342,17 +348,20 @@ int yaffs_CheckpointRead(yaffs_Device *d
+ return i;
+ }
+
+-int yaffs_CheckpointClose(yaffs_Device *dev)
++int yaffs2_CheckpointClose(yaffs_Device *dev)
+ {
+
+ if (dev->checkpointOpenForWrite) {
+ if (dev->checkpointByteOffset != 0)
+- yaffs_CheckpointFlushBuffer(dev);
+- } else {
++ yaffs2_CheckpointFlushBuffer(dev);
++ } else if(dev->checkpointBlockList){
+ int i;
+ for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) {
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointBlockList[i]);
+- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
++ int blk = dev->checkpointBlockList[i];
++ yaffs_BlockInfo *bi = NULL;
++ if( dev->internalStartBlock <= blk && blk <= dev->internalEndBlock)
++ bi = yaffs_GetBlockInfo(dev, blk);
++ if (bi && bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
+ bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
+ else {
+ /* Todo this looks odd... */
+@@ -362,7 +371,7 @@ int yaffs_CheckpointClose(yaffs_Device *
+ dev->checkpointBlockList = NULL;
+ }
+
+- dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
++ dev->nFreeChunks -= dev->blocksInCheckpoint * dev->param.nChunksPerBlock;
+ dev->nErasedBlocks -= dev->blocksInCheckpoint;
+
+
+@@ -378,16 +387,14 @@ int yaffs_CheckpointClose(yaffs_Device *
+ return 0;
+ }
+
+-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
++int yaffs2_CheckpointInvalidateStream(yaffs_Device *dev)
+ {
+- /* Erase the first checksum block */
+-
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate"TENDSTR)));
++ /* Erase the checkpoint data */
+
+- if (!yaffs_CheckpointSpaceOk(dev))
+- return 0;
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR),
++ dev->blocksInCheckpoint));
+
+- return yaffs_CheckpointErase(dev);
++ return yaffs2_CheckpointErase(dev);
+ }
+
+
+diff -Nrup a/fs/yaffs2/yaffs_checkptrw.h b/fs/yaffs2/yaffs_checkptrw.h
+--- a/fs/yaffs2/yaffs_checkptrw.h 2010-10-03 17:48:22.706000363 +0300
++++ b/fs/yaffs2/yaffs_checkptrw.h 2010-10-03 18:03:47.540000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -18,18 +18,17 @@
+
+ #include "yaffs_guts.h"
+
+-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting);
++int yaffs2_CheckpointOpen(yaffs_Device *dev, int forWriting);
+
+-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
++int yaffs2_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes);
+
+-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
++int yaffs2_CheckpointRead(yaffs_Device *dev, void *data, int nBytes);
+
+-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
++int yaffs2_GetCheckpointSum(yaffs_Device *dev, __u32 *sum);
+
+-int yaffs_CheckpointClose(yaffs_Device *dev);
++int yaffs2_CheckpointClose(yaffs_Device *dev);
+
+-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev);
++int yaffs2_CheckpointInvalidateStream(yaffs_Device *dev);
+
+
+ #endif
+-
+diff -Nrup a/fs/yaffs2/yaffs_ecc.c b/fs/yaffs2/yaffs_ecc.c
+--- a/fs/yaffs2/yaffs_ecc.c 2010-10-03 17:48:22.706000363 +0300
++++ b/fs/yaffs2/yaffs_ecc.c 2010-10-03 18:03:47.509000373 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -28,9 +28,6 @@
+ * this bytes influence on the line parity.
+ */
+
+-const char *yaffs_ecc_c_version =
+- "$Id: yaffs_ecc.c,v 1.11 2009-03-06 17:20:50 wookey Exp $";
+-
+ #include "yportenv.h"
+
+ #include "yaffs_ecc.h"
+diff -Nrup a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h
+--- a/fs/yaffs2/yaffs_ecc.h 2010-10-03 17:48:22.707000363 +0300
++++ b/fs/yaffs2/yaffs_ecc.h 2010-10-03 18:03:47.541000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_fs.c b/fs/yaffs2/yaffs_fs.c
+--- a/fs/yaffs2/yaffs_fs.c 2010-10-03 17:48:22.708000363 +0300
++++ b/fs/yaffs2/yaffs_fs.c 1970-01-01 02:00:00.000000000 +0200
+@@ -1,2529 +0,0 @@
+-/*
+- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+- *
+- * Copyright (C) 2002-2009 Aleph One Ltd.
+- * for Toby Churchill Ltd and Brightstar Engineering
+- *
+- * Created by Charles Manning <charles@aleph1.co.uk>
+- * Acknowledgements:
+- * Luc van OostenRyck for numerous patches.
+- * Nick Bane for numerous patches.
+- * Nick Bane for 2.5/2.6 integration.
+- * Andras Toth for mknod rdev issue.
+- * Michael Fischer for finding the problem with inode inconsistency.
+- * Some code bodily lifted from JFFS
+- *
+- * This program is free software; you can redistribute it and/or modify
+- * it under the terms of the GNU General Public License version 2 as
+- * published by the Free Software Foundation.
+- */
+-
+-/*
+- *
+- * This is the file system front-end to YAFFS that hooks it up to
+- * the VFS.
+- *
+- * Special notes:
+- * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
+- * this superblock
+- * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
+- * superblock
+- * >> inode->u.generic_ip points to the associated yaffs_Object.
+- */
+-
+-const char *yaffs_fs_c_version =
+- "$Id: yaffs_fs.c,v 1.79 2009-03-17 01:12:00 wookey Exp $";
+-extern const char *yaffs_guts_c_version;
+-
+-#include <linux/version.h>
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+-#include <linux/config.h>
+-#endif
+-#include <linux/kernel.h>
+-#include <linux/module.h>
+-#include <linux/slab.h>
+-#include <linux/init.h>
+-#include <linux/fs.h>
+-#include <linux/proc_fs.h>
+-#include <linux/smp_lock.h>
+-#include <linux/pagemap.h>
+-#include <linux/mtd/mtd.h>
+-#include <linux/interrupt.h>
+-#include <linux/string.h>
+-#include <linux/ctype.h>
+-
+-#include "asm/div64.h"
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+-#include <linux/statfs.h> /* Added NCB 15-8-2003 */
+-#include <linux/statfs.h>
+-#define UnlockPage(p) unlock_page(p)
+-#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
+-
+-/* FIXME: use sb->s_id instead ? */
+-#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
+-
+-#else
+-
+-#include <linux/locks.h>
+-#define BDEVNAME_SIZE 0
+-#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
+-/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
+-#define __user
+-#endif
+-
+-#endif
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
+-#define YPROC_ROOT (&proc_root)
+-#else
+-#define YPROC_ROOT NULL
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-#define WRITE_SIZE_STR "writesize"
+-#define WRITE_SIZE(mtd) ((mtd)->writesize)
+-#else
+-#define WRITE_SIZE_STR "oobblock"
+-#define WRITE_SIZE(mtd) ((mtd)->oobblock)
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
+-#define YAFFS_USE_WRITE_BEGIN_END 1
+-#else
+-#define YAFFS_USE_WRITE_BEGIN_END 0
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
+-static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
+-{
+- uint64_t result = partition_size;
+- do_div(result, block_size);
+- return (uint32_t)result;
+-}
+-#else
+-#define YCALCBLOCKS(s, b) ((s)/(b))
+-#endif
+-
+-#include <linux/uaccess.h>
+-
+-#include "yportenv.h"
+-#include "yaffs_guts.h"
+-
+-#include <linux/mtd/mtd.h>
+-#include "yaffs_mtdif.h"
+-#include "yaffs_mtdif1.h"
+-#include "yaffs_mtdif2.h"
+-
+-unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
+-unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
+-unsigned int yaffs_auto_checkpoint = 1;
+-
+-/* Module Parameters */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-module_param(yaffs_traceMask, uint, 0644);
+-module_param(yaffs_wr_attempts, uint, 0644);
+-module_param(yaffs_auto_checkpoint, uint, 0644);
+-#else
+-MODULE_PARM(yaffs_traceMask, "i");
+-MODULE_PARM(yaffs_wr_attempts, "i");
+-MODULE_PARM(yaffs_auto_checkpoint, "i");
+-#endif
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
+-/* use iget and read_inode */
+-#define Y_IGET(sb, inum) iget((sb), (inum))
+-static void yaffs_read_inode(struct inode *inode);
+-
+-#else
+-/* Call local equivalent */
+-#define YAFFS_USE_OWN_IGET
+-#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
+-
+-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
+-#endif
+-
+-/*#define T(x) printk x */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+-#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
+-#else
+-#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
+-#endif
+-
+-#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
+-#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
+-#else
+-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
+-#endif
+-
+-static void yaffs_put_super(struct super_block *sb);
+-
+-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+- loff_t *pos);
+-static ssize_t yaffs_hold_space(struct file *f);
+-static void yaffs_release_space(struct file *f);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_file_flush(struct file *file, fl_owner_t id);
+-#else
+-static int yaffs_file_flush(struct file *file);
+-#endif
+-
+-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+- int datasync);
+-
+-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+- struct nameidata *n);
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+- struct nameidata *n);
+-#else
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
+-#endif
+-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+- struct dentry *dentry);
+-static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
+-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+- const char *symname);
+-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+- dev_t dev);
+-#else
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+- int dev);
+-#endif
+-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry);
+-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_sync_fs(struct super_block *sb, int wait);
+-static void yaffs_write_super(struct super_block *sb);
+-#else
+-static int yaffs_sync_fs(struct super_block *sb);
+-static int yaffs_write_super(struct super_block *sb);
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
+-#else
+-static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
+-#endif
+-
+-#ifdef YAFFS_HAS_PUT_INODE
+-static void yaffs_put_inode(struct inode *inode);
+-#endif
+-
+-static void yaffs_delete_inode(struct inode *);
+-static void yaffs_clear_inode(struct inode *);
+-
+-static int yaffs_readpage(struct file *file, struct page *page);
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
+-#else
+-static int yaffs_writepage(struct page *page);
+-#endif
+-
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END != 0)
+-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+- loff_t pos, unsigned len, unsigned flags,
+- struct page **pagep, void **fsdata);
+-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+- loff_t pos, unsigned len, unsigned copied,
+- struct page *pg, void *fsdadata);
+-#else
+-static int yaffs_prepare_write(struct file *f, struct page *pg,
+- unsigned offset, unsigned to);
+-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+- unsigned to);
+-
+-#endif
+-
+-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+- int buflen);
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+-#else
+-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+-#endif
+-
+-static struct address_space_operations yaffs_file_address_operations = {
+- .readpage = yaffs_readpage,
+- .writepage = yaffs_writepage,
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+- .write_begin = yaffs_write_begin,
+- .write_end = yaffs_write_end,
+-#else
+- .prepare_write = yaffs_prepare_write,
+- .commit_write = yaffs_commit_write,
+-#endif
+-};
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
+-static const struct file_operations yaffs_file_operations = {
+- .read = do_sync_read,
+- .write = do_sync_write,
+- .aio_read = generic_file_aio_read,
+- .aio_write = generic_file_aio_write,
+- .mmap = generic_file_mmap,
+- .flush = yaffs_file_flush,
+- .fsync = yaffs_sync_object,
+- .splice_read = generic_file_splice_read,
+- .splice_write = generic_file_splice_write,
+- .llseek = generic_file_llseek,
+-};
+-
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
+-
+-static const struct file_operations yaffs_file_operations = {
+- .read = do_sync_read,
+- .write = do_sync_write,
+- .aio_read = generic_file_aio_read,
+- .aio_write = generic_file_aio_write,
+- .mmap = generic_file_mmap,
+- .flush = yaffs_file_flush,
+- .fsync = yaffs_sync_object,
+- .sendfile = generic_file_sendfile,
+-};
+-
+-#else
+-
+-static const struct file_operations yaffs_file_operations = {
+- .read = generic_file_read,
+- .write = generic_file_write,
+- .mmap = generic_file_mmap,
+- .flush = yaffs_file_flush,
+- .fsync = yaffs_sync_object,
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- .sendfile = generic_file_sendfile,
+-#endif
+-};
+-#endif
+-
+-static const struct inode_operations yaffs_file_inode_operations = {
+- .setattr = yaffs_setattr,
+-};
+-
+-static const struct inode_operations yaffs_symlink_inode_operations = {
+- .readlink = yaffs_readlink,
+- .follow_link = yaffs_follow_link,
+- .setattr = yaffs_setattr,
+-};
+-
+-static const struct inode_operations yaffs_dir_inode_operations = {
+- .create = yaffs_create,
+- .lookup = yaffs_lookup,
+- .link = yaffs_link,
+- .unlink = yaffs_unlink,
+- .symlink = yaffs_symlink,
+- .mkdir = yaffs_mkdir,
+- .rmdir = yaffs_unlink,
+- .mknod = yaffs_mknod,
+- .rename = yaffs_rename,
+- .setattr = yaffs_setattr,
+-};
+-
+-static const struct file_operations yaffs_dir_operations = {
+- .read = generic_read_dir,
+- .readdir = yaffs_readdir,
+- .fsync = yaffs_sync_object,
+-};
+-
+-static const struct super_operations yaffs_super_ops = {
+- .statfs = yaffs_statfs,
+-
+-#ifndef YAFFS_USE_OWN_IGET
+- .read_inode = yaffs_read_inode,
+-#endif
+-#ifdef YAFFS_HAS_PUT_INODE
+- .put_inode = yaffs_put_inode,
+-#endif
+- .put_super = yaffs_put_super,
+- .delete_inode = yaffs_delete_inode,
+- .clear_inode = yaffs_clear_inode,
+- .sync_fs = yaffs_sync_fs,
+- .write_super = yaffs_write_super,
+-};
+-
+-static void yaffs_GrossLock(yaffs_Device *dev)
+-{
+- T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current));
+- down(&dev->grossLock);
+- T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current));
+-}
+-
+-static void yaffs_GrossUnlock(yaffs_Device *dev)
+-{
+- T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current));
+- up(&dev->grossLock);
+-}
+-
+-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
+- int buflen)
+-{
+- unsigned char *alias;
+- int ret;
+-
+- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+-
+- yaffs_GrossUnlock(dev);
+-
+- if (!alias)
+- return -ENOMEM;
+-
+- ret = vfs_readlink(dentry, buffer, buflen, alias);
+- kfree(alias);
+- return ret;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+-#else
+-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+-#endif
+-{
+- unsigned char *alias;
+- int ret;
+- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+-
+- yaffs_GrossUnlock(dev);
+-
+- if (!alias) {
+- ret = -ENOMEM;
+- goto out;
+- }
+-
+- ret = vfs_follow_link(nd, alias);
+- kfree(alias);
+-out:
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+- return ERR_PTR(ret);
+-#else
+- return ret;
+-#endif
+-}
+-
+-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+- yaffs_Object *obj);
+-
+-/*
+- * Lookup is used to find objects in the fs
+- */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
+- struct nameidata *n)
+-#else
+-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
+-#endif
+-{
+- yaffs_Object *obj;
+- struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
+-
+- yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_lookup for %d:%s\n",
+- yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
+-
+- obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
+- dentry->d_name.name);
+-
+- obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
+-
+- /* Can't hold gross lock when calling yaffs_get_inode() */
+- yaffs_GrossUnlock(dev);
+-
+- if (obj) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_lookup found %d\n", obj->objectId));
+-
+- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+-
+- if (inode) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_loookup dentry \n"));
+-/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
+- * d_add even if NULL inode */
+-#if 0
+- /*dget(dentry); // try to solve directory bug */
+- d_add(dentry, inode);
+-
+- /* return dentry; */
+- return NULL;
+-#endif
+- }
+-
+- } else {
+- T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n"));
+-
+- }
+-
+-/* added NCB for 2.5/6 compatability - forces add even if inode is
+- * NULL which creates dentry hash */
+- d_add(dentry, inode);
+-
+- return NULL;
+-}
+-
+-
+-#ifdef YAFFS_HAS_PUT_INODE
+-
+-/* For now put inode is just for debugging
+- * Put inode is called when the inode **structure** is put.
+- */
+-static void yaffs_put_inode(struct inode *inode)
+-{
+- T(YAFFS_TRACE_OS,
+- ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
+- atomic_read(&inode->i_count)));
+-
+-}
+-#endif
+-
+-/* clear is called to tell the fs to release any per-inode data it holds */
+-static void yaffs_clear_inode(struct inode *inode)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+-
+- obj = yaffs_InodeToObject(inode);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
+- atomic_read(&inode->i_count),
+- obj ? "object exists" : "null object"));
+-
+- if (obj) {
+- dev = obj->myDev;
+- yaffs_GrossLock(dev);
+-
+- /* Clear the association between the inode and
+- * the yaffs_Object.
+- */
+- obj->myInode = NULL;
+- yaffs_InodeToObjectLV(inode) = NULL;
+-
+- /* If the object freeing was deferred, then the real
+- * free happens now.
+- * This should fix the inode inconsistency problem.
+- */
+-
+- yaffs_HandleDeferedFree(obj);
+-
+- yaffs_GrossUnlock(dev);
+- }
+-
+-}
+-
+-/* delete is called when the link count is zero and the inode
+- * is put (ie. nobody wants to know about it anymore, time to
+- * delete the file).
+- * NB Must call clear_inode()
+- */
+-static void yaffs_delete_inode(struct inode *inode)
+-{
+- yaffs_Object *obj = yaffs_InodeToObject(inode);
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino,
+- atomic_read(&inode->i_count),
+- obj ? "object exists" : "null object"));
+-
+- if (obj) {
+- dev = obj->myDev;
+- yaffs_GrossLock(dev);
+- yaffs_DeleteObject(obj);
+- yaffs_GrossUnlock(dev);
+- }
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+- truncate_inode_pages(&inode->i_data, 0);
+-#endif
+- clear_inode(inode);
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_file_flush(struct file *file, fl_owner_t id)
+-#else
+-static int yaffs_file_flush(struct file *file)
+-#endif
+-{
+- yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
+-
+- yaffs_Device *dev = obj->myDev;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_flush object %d (%s)\n", obj->objectId,
+- obj->dirty ? "dirty" : "clean"));
+-
+- yaffs_GrossLock(dev);
+-
+- yaffs_FlushFile(obj, 1);
+-
+- yaffs_GrossUnlock(dev);
+-
+- return 0;
+-}
+-
+-static int yaffs_readpage_nolock(struct file *f, struct page *pg)
+-{
+- /* Lifted from jffs2 */
+-
+- yaffs_Object *obj;
+- unsigned char *pg_buf;
+- int ret;
+-
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n",
+- (unsigned)(pg->index << PAGE_CACHE_SHIFT),
+- (unsigned)PAGE_CACHE_SIZE));
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+-
+- dev = obj->myDev;
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- BUG_ON(!PageLocked(pg));
+-#else
+- if (!PageLocked(pg))
+- PAGE_BUG(pg);
+-#endif
+-
+- pg_buf = kmap(pg);
+- /* FIXME: Can kmap fail? */
+-
+- yaffs_GrossLock(dev);
+-
+- ret = yaffs_ReadDataFromFile(obj, pg_buf,
+- pg->index << PAGE_CACHE_SHIFT,
+- PAGE_CACHE_SIZE);
+-
+- yaffs_GrossUnlock(dev);
+-
+- if (ret >= 0)
+- ret = 0;
+-
+- if (ret) {
+- ClearPageUptodate(pg);
+- SetPageError(pg);
+- } else {
+- SetPageUptodate(pg);
+- ClearPageError(pg);
+- }
+-
+- flush_dcache_page(pg);
+- kunmap(pg);
+-
+- T(YAFFS_TRACE_OS, ("yaffs_readpage done\n"));
+- return ret;
+-}
+-
+-static int yaffs_readpage_unlock(struct file *f, struct page *pg)
+-{
+- int ret = yaffs_readpage_nolock(f, pg);
+- UnlockPage(pg);
+- return ret;
+-}
+-
+-static int yaffs_readpage(struct file *f, struct page *pg)
+-{
+- return yaffs_readpage_unlock(f, pg);
+-}
+-
+-/* writepage inspired by/stolen from smbfs */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+-#else
+-static int yaffs_writepage(struct page *page)
+-#endif
+-{
+- struct address_space *mapping = page->mapping;
+- loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
+- struct inode *inode;
+- unsigned long end_index;
+- char *buffer;
+- yaffs_Object *obj;
+- int nWritten = 0;
+- unsigned nBytes;
+-
+- if (!mapping)
+- BUG();
+- inode = mapping->host;
+- if (!inode)
+- BUG();
+-
+- if (offset > inode->i_size) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_writepage at %08x, inode size = %08x!!!\n",
+- (unsigned)(page->index << PAGE_CACHE_SHIFT),
+- (unsigned)inode->i_size));
+- T(YAFFS_TRACE_OS,
+- (" -> don't care!!\n"));
+- unlock_page(page);
+- return 0;
+- }
+-
+- end_index = inode->i_size >> PAGE_CACHE_SHIFT;
+-
+- /* easy case */
+- if (page->index < end_index)
+- nBytes = PAGE_CACHE_SIZE;
+- else
+- nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
+-
+- get_page(page);
+-
+- buffer = kmap(page);
+-
+- obj = yaffs_InodeToObject(inode);
+- yaffs_GrossLock(obj->myDev);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_writepage at %08x, size %08x\n",
+- (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
+- T(YAFFS_TRACE_OS,
+- ("writepag0: obj = %05x, ino = %05x\n",
+- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+-
+- nWritten = yaffs_WriteDataToFile(obj, buffer,
+- page->index << PAGE_CACHE_SHIFT, nBytes, 0);
+-
+- T(YAFFS_TRACE_OS,
+- ("writepag1: obj = %05x, ino = %05x\n",
+- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+-
+- yaffs_GrossUnlock(obj->myDev);
+-
+- kunmap(page);
+- SetPageUptodate(page);
+- UnlockPage(page);
+- put_page(page);
+-
+- return (nWritten == nBytes) ? 0 : -ENOSPC;
+-}
+-
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
+- loff_t pos, unsigned len, unsigned flags,
+- struct page **pagep, void **fsdata)
+-{
+- struct page *pg = NULL;
+- pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+- uint32_t offset = pos & (PAGE_CACHE_SIZE - 1);
+- uint32_t to = offset + len;
+-
+- int ret = 0;
+- int space_held = 0;
+-
+- T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n"));
+- /* Get a page */
+-#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)
+- pg = grab_cache_page_write_begin(mapping, index, flags);
+-#else
+- pg = __grab_cache_page(mapping, index);
+-#endif
+-
+- *pagep = pg;
+- if (!pg) {
+- ret = -ENOMEM;
+- goto out;
+- }
+- /* Get fs space */
+- space_held = yaffs_hold_space(filp);
+-
+- if (!space_held) {
+- ret = -ENOSPC;
+- goto out;
+- }
+-
+- /* Update page if required */
+-
+- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+- ret = yaffs_readpage_nolock(filp, pg);
+-
+- if (ret)
+- goto out;
+-
+- /* Happy path return */
+- T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n"));
+-
+- return 0;
+-
+-out:
+- T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret));
+- if (space_held)
+- yaffs_release_space(filp);
+- if (pg) {
+- unlock_page(pg);
+- page_cache_release(pg);
+- }
+- return ret;
+-}
+-
+-#else
+-
+-static int yaffs_prepare_write(struct file *f, struct page *pg,
+- unsigned offset, unsigned to)
+-{
+- T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n"));
+-
+- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+- return yaffs_readpage_nolock(f, pg);
+- return 0;
+-}
+-#endif
+-
+-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
+-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
+- loff_t pos, unsigned len, unsigned copied,
+- struct page *pg, void *fsdadata)
+-{
+- int ret = 0;
+- void *addr, *kva;
+- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
+-
+- kva = kmap(pg);
+- addr = kva + offset_into_page;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_write_end addr %x pos %x nBytes %d\n",
+- (unsigned) addr,
+- (int)pos, copied));
+-
+- ret = yaffs_file_write(filp, addr, copied, &pos);
+-
+- if (ret != copied) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_write_end not same size ret %d copied %d\n",
+- ret, copied));
+- SetPageError(pg);
+- ClearPageUptodate(pg);
+- } else {
+- SetPageUptodate(pg);
+- }
+-
+- kunmap(pg);
+-
+- yaffs_release_space(filp);
+- unlock_page(pg);
+- page_cache_release(pg);
+- return ret;
+-}
+-#else
+-
+-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
+- unsigned to)
+-{
+- void *addr, *kva;
+-
+- loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
+- int nBytes = to - offset;
+- int nWritten;
+-
+- unsigned spos = pos;
+- unsigned saddr;
+-
+- kva = kmap(pg);
+- addr = kva + offset;
+-
+- saddr = (unsigned) addr;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_commit_write addr %x pos %x nBytes %d\n",
+- saddr, spos, nBytes));
+-
+- nWritten = yaffs_file_write(f, addr, nBytes, &pos);
+-
+- if (nWritten != nBytes) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_commit_write not same size nWritten %d nBytes %d\n",
+- nWritten, nBytes));
+- SetPageError(pg);
+- ClearPageUptodate(pg);
+- } else {
+- SetPageUptodate(pg);
+- }
+-
+- kunmap(pg);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_commit_write returning %d\n",
+- nWritten == nBytes ? 0 : nWritten));
+-
+- return nWritten == nBytes ? 0 : nWritten;
+-}
+-#endif
+-
+-
+-static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
+-{
+- if (inode && obj) {
+-
+-
+- /* Check mode against the variant type and attempt to repair if broken. */
+- __u32 mode = obj->yst_mode;
+- switch (obj->variantType) {
+- case YAFFS_OBJECT_TYPE_FILE:
+- if (!S_ISREG(mode)) {
+- obj->yst_mode &= ~S_IFMT;
+- obj->yst_mode |= S_IFREG;
+- }
+-
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- if (!S_ISLNK(mode)) {
+- obj->yst_mode &= ~S_IFMT;
+- obj->yst_mode |= S_IFLNK;
+- }
+-
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- if (!S_ISDIR(mode)) {
+- obj->yst_mode &= ~S_IFMT;
+- obj->yst_mode |= S_IFDIR;
+- }
+-
+- break;
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- default:
+- /* TODO? */
+- break;
+- }
+-
+- inode->i_flags |= S_NOATIME;
+-
+- inode->i_ino = obj->objectId;
+- inode->i_mode = obj->yst_mode;
+- inode->i_uid = obj->yst_uid;
+- inode->i_gid = obj->yst_gid;
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+- inode->i_blksize = inode->i_sb->s_blocksize;
+-#endif
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-
+- inode->i_rdev = old_decode_dev(obj->yst_rdev);
+- inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
+- inode->i_atime.tv_nsec = 0;
+- inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
+- inode->i_mtime.tv_nsec = 0;
+- inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
+- inode->i_ctime.tv_nsec = 0;
+-#else
+- inode->i_rdev = obj->yst_rdev;
+- inode->i_atime = obj->yst_atime;
+- inode->i_mtime = obj->yst_mtime;
+- inode->i_ctime = obj->yst_ctime;
+-#endif
+- inode->i_size = yaffs_GetObjectFileLength(obj);
+- inode->i_blocks = (inode->i_size + 511) >> 9;
+-
+- inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
+- inode->i_mode, inode->i_uid, inode->i_gid,
+- (int)inode->i_size, atomic_read(&inode->i_count)));
+-
+- switch (obj->yst_mode & S_IFMT) {
+- default: /* fifo, device or socket */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- init_special_inode(inode, obj->yst_mode,
+- old_decode_dev(obj->yst_rdev));
+-#else
+- init_special_inode(inode, obj->yst_mode,
+- (dev_t) (obj->yst_rdev));
+-#endif
+- break;
+- case S_IFREG: /* file */
+- inode->i_op = &yaffs_file_inode_operations;
+- inode->i_fop = &yaffs_file_operations;
+- inode->i_mapping->a_ops =
+- &yaffs_file_address_operations;
+- break;
+- case S_IFDIR: /* directory */
+- inode->i_op = &yaffs_dir_inode_operations;
+- inode->i_fop = &yaffs_dir_operations;
+- break;
+- case S_IFLNK: /* symlink */
+- inode->i_op = &yaffs_symlink_inode_operations;
+- break;
+- }
+-
+- yaffs_InodeToObjectLV(inode) = obj;
+-
+- obj->myInode = inode;
+-
+- } else {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_FileInode invalid parameters\n"));
+- }
+-
+-}
+-
+-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
+- yaffs_Object *obj)
+-{
+- struct inode *inode;
+-
+- if (!sb) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_get_inode for NULL super_block!!\n"));
+- return NULL;
+-
+- }
+-
+- if (!obj) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_get_inode for NULL object!!\n"));
+- return NULL;
+-
+- }
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_get_inode for object %d\n", obj->objectId));
+-
+- inode = Y_IGET(sb, obj->objectId);
+- if (IS_ERR(inode))
+- return NULL;
+-
+- /* NB Side effect: iget calls back to yaffs_read_inode(). */
+- /* iget also increments the inode's i_count */
+- /* NB You can't be holding grossLock or deadlock will happen! */
+-
+- return inode;
+-}
+-
+-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+- loff_t *pos)
+-{
+- yaffs_Object *obj;
+- int nWritten, ipos;
+- struct inode *inode;
+- yaffs_Device *dev;
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+-
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- inode = f->f_dentry->d_inode;
+-
+- if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
+- ipos = inode->i_size;
+- else
+- ipos = *pos;
+-
+- if (!obj)
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_write: hey obj is null!\n"));
+- else
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_write about to write writing %zu bytes"
+- "to object %d at %d\n",
+- n, obj->objectId, ipos));
+-
+- nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_write writing %zu bytes, %d written at %d\n",
+- n, nWritten, ipos));
+-
+- if (nWritten > 0) {
+- ipos += nWritten;
+- *pos = ipos;
+- if (ipos > inode->i_size) {
+- inode->i_size = ipos;
+- inode->i_blocks = (ipos + 511) >> 9;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_file_write size updated to %d bytes, "
+- "%d blocks\n",
+- ipos, (int)(inode->i_blocks)));
+- }
+-
+- }
+- yaffs_GrossUnlock(dev);
+- return nWritten == 0 ? -ENOSPC : nWritten;
+-}
+-
+-/* Space holding and freeing is done to ensure we have space available for write_begin/end */
+-/* For now we just assume few parallel writes and check against a small number. */
+-/* Todo: need to do this with a counter to handle parallel reads better */
+-
+-static ssize_t yaffs_hold_space(struct file *f)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+-
+- int nFreeChunks;
+-
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+-
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
+-
+- yaffs_GrossUnlock(dev);
+-
+- return (nFreeChunks > 20) ? 1 : 0;
+-}
+-
+-static void yaffs_release_space(struct file *f)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+-
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+-
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+-
+- yaffs_GrossUnlock(dev);
+-}
+-
+-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+- struct inode *inode = f->f_dentry->d_inode;
+- unsigned long offset, curoffs;
+- struct ylist_head *i;
+- yaffs_Object *l;
+-
+- char name[YAFFS_MAX_NAME_LENGTH + 1];
+-
+- obj = yaffs_DentryToObject(f->f_dentry);
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- offset = f->f_pos;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset));
+-
+- if (offset == 0) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_readdir: entry . ino %d \n",
+- (int)inode->i_ino));
+- if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0)
+- goto out;
+- offset++;
+- f->f_pos++;
+- }
+- if (offset == 1) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_readdir: entry .. ino %d \n",
+- (int)f->f_dentry->d_parent->d_inode->i_ino));
+- if (filldir(dirent, "..", 2, offset,
+- f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0)
+- goto out;
+- offset++;
+- f->f_pos++;
+- }
+-
+- curoffs = 1;
+-
+- /* If the directory has changed since the open or last call to
+- readdir, rewind to after the 2 canned entries. */
+-
+- if (f->f_version != inode->i_version) {
+- offset = 2;
+- f->f_pos = offset;
+- f->f_version = inode->i_version;
+- }
+-
+- ylist_for_each(i, &obj->variant.directoryVariant.children) {
+- curoffs++;
+- if (curoffs >= offset) {
+- l = ylist_entry(i, yaffs_Object, siblings);
+-
+- yaffs_GetObjectName(l, name,
+- YAFFS_MAX_NAME_LENGTH + 1);
+- T(YAFFS_TRACE_OS,
+- ("yaffs_readdir: %s inode %d\n", name,
+- yaffs_GetObjectInode(l)));
+-
+- if (filldir(dirent,
+- name,
+- strlen(name),
+- offset,
+- yaffs_GetObjectInode(l),
+- yaffs_GetObjectType(l)) < 0)
+- goto up_and_out;
+-
+- offset++;
+- f->f_pos++;
+- }
+- }
+-
+-up_and_out:
+-out:
+- yaffs_GrossUnlock(dev);
+-
+- return 0;
+-}
+-
+-/*
+- * File creation. Allocate an inode, and we're done..
+- */
+-
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+-#define YCRED(x) x
+-#else
+-#define YCRED(x) (x->cred)
+-#endif
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+- dev_t rdev)
+-#else
+-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
+- int rdev)
+-#endif
+-{
+- struct inode *inode;
+-
+- yaffs_Object *obj = NULL;
+- yaffs_Device *dev;
+-
+- yaffs_Object *parent = yaffs_InodeToObject(dir);
+-
+- int error = -ENOSPC;
+- uid_t uid = YCRED(current)->fsuid;
+- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+-
+- if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+- mode |= S_ISGID;
+-
+- if (parent) {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod: parent object %d type %d\n",
+- parent->objectId, parent->variantType));
+- } else {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod: could not get parent object\n"));
+- return -EPERM;
+- }
+-
+- T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, "
+- "mode %x dev %x\n",
+- dentry->d_name.name, mode, rdev));
+-
+- dev = parent->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- switch (mode & S_IFMT) {
+- default:
+- /* Special (socket, fifo, device...) */
+- T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n"));
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+- gid, old_encode_dev(rdev));
+-#else
+- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+- gid, rdev);
+-#endif
+- break;
+- case S_IFREG: /* file */
+- T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n"));
+- obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
+- gid);
+- break;
+- case S_IFDIR: /* directory */
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod: making directory\n"));
+- obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
+- uid, gid);
+- break;
+- case S_IFLNK: /* symlink */
+- T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n"));
+- obj = NULL; /* Do we ever get here? */
+- break;
+- }
+-
+- /* Can not call yaffs_get_inode() with gross lock held */
+- yaffs_GrossUnlock(dev);
+-
+- if (obj) {
+- inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
+- d_instantiate(dentry, inode);
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod created object %d count = %d\n",
+- obj->objectId, atomic_read(&inode->i_count)));
+- error = 0;
+- } else {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_mknod failed making object\n"));
+- error = -ENOMEM;
+- }
+-
+- return error;
+-}
+-
+-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+-{
+- int retVal;
+- T(YAFFS_TRACE_OS, ("yaffs_mkdir\n"));
+- retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
+- return retVal;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
+- struct nameidata *n)
+-#else
+-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
+-#endif
+-{
+- T(YAFFS_TRACE_OS, ("yaffs_create\n"));
+- return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+-}
+-
+-static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
+-{
+- int retVal;
+-
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_unlink %d:%s\n", (int)(dir->i_ino),
+- dentry->d_name.name));
+-
+- dev = yaffs_InodeToObject(dir)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name);
+-
+- if (retVal == YAFFS_OK) {
+- dentry->d_inode->i_nlink--;
+- dir->i_version++;
+- yaffs_GrossUnlock(dev);
+- mark_inode_dirty(dentry->d_inode);
+- return 0;
+- }
+- yaffs_GrossUnlock(dev);
+- return -ENOTEMPTY;
+-}
+-
+-/*
+- * Create a link...
+- */
+-static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
+- struct dentry *dentry)
+-{
+- struct inode *inode = old_dentry->d_inode;
+- yaffs_Object *obj = NULL;
+- yaffs_Object *link = NULL;
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_link\n"));
+-
+- obj = yaffs_InodeToObject(inode);
+- dev = obj->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
+- link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
+- obj);
+-
+- if (link) {
+- old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+- d_instantiate(dentry, old_dentry->d_inode);
+- atomic_inc(&old_dentry->d_inode->i_count);
+- T(YAFFS_TRACE_OS,
+- ("yaffs_link link count %d i_count %d\n",
+- old_dentry->d_inode->i_nlink,
+- atomic_read(&old_dentry->d_inode->i_count)));
+- }
+-
+- yaffs_GrossUnlock(dev);
+-
+- if (link)
+- return 0;
+-
+- return -EPERM;
+-}
+-
+-static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
+- const char *symname)
+-{
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+- uid_t uid = YCRED(current)->fsuid;
+- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_symlink\n"));
+-
+- dev = yaffs_InodeToObject(dir)->myDev;
+- yaffs_GrossLock(dev);
+- obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
+- S_IFLNK | S_IRWXUGO, uid, gid, symname);
+- yaffs_GrossUnlock(dev);
+-
+- if (obj) {
+- struct inode *inode;
+-
+- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
+- d_instantiate(dentry, inode);
+- T(YAFFS_TRACE_OS, ("symlink created OK\n"));
+- return 0;
+- } else {
+- T(YAFFS_TRACE_OS, ("symlink not created\n"));
+- }
+-
+- return -ENOMEM;
+-}
+-
+-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
+- int datasync)
+-{
+-
+- yaffs_Object *obj;
+- yaffs_Device *dev;
+-
+- obj = yaffs_DentryToObject(dentry);
+-
+- dev = obj->myDev;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_sync_object\n"));
+- yaffs_GrossLock(dev);
+- yaffs_FlushFile(obj, 1);
+- yaffs_GrossUnlock(dev);
+- return 0;
+-}
+-
+-/*
+- * The VFS layer already does all the dentry stuff for rename.
+- *
+- * NB: POSIX says you can rename an object over an old object of the same name
+- */
+-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry)
+-{
+- yaffs_Device *dev;
+- int retVal = YAFFS_FAIL;
+- yaffs_Object *target;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_rename\n"));
+- dev = yaffs_InodeToObject(old_dir)->myDev;
+-
+- yaffs_GrossLock(dev);
+-
+- /* Check if the target is an existing directory that is not empty. */
+- target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
+- new_dentry->d_name.name);
+-
+-
+-
+- if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+- !ylist_empty(&target->variant.directoryVariant.children)) {
+-
+- T(YAFFS_TRACE_OS, ("target is non-empty dir\n"));
+-
+- retVal = YAFFS_FAIL;
+- } else {
+- /* Now does unlinking internally using shadowing mechanism */
+- T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n"));
+-
+- retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
+- old_dentry->d_name.name,
+- yaffs_InodeToObject(new_dir),
+- new_dentry->d_name.name);
+- }
+- yaffs_GrossUnlock(dev);
+-
+- if (retVal == YAFFS_OK) {
+- if (target) {
+- new_dentry->d_inode->i_nlink--;
+- mark_inode_dirty(new_dentry->d_inode);
+- }
+-
+- return 0;
+- } else {
+- return -ENOTEMPTY;
+- }
+-}
+-
+-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+-{
+- struct inode *inode = dentry->d_inode;
+- int error;
+- yaffs_Device *dev;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_setattr of object %d\n",
+- yaffs_InodeToObject(inode)->objectId));
+-
+- error = inode_change_ok(inode, attr);
+- if (error == 0) {
+- dev = yaffs_InodeToObject(inode)->myDev;
+- yaffs_GrossLock(dev);
+- if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) ==
+- YAFFS_OK) {
+- error = 0;
+- } else {
+- error = -EPERM;
+- }
+- yaffs_GrossUnlock(dev);
+- if (!error)
+- error = inode_setattr(inode, attr);
+- }
+- return error;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
+-{
+- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+- struct super_block *sb = dentry->d_sb;
+-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
+-{
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-#else
+-static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
+-{
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-#endif
+-
+- T(YAFFS_TRACE_OS, ("yaffs_statfs\n"));
+-
+- yaffs_GrossLock(dev);
+-
+- buf->f_type = YAFFS_MAGIC;
+- buf->f_bsize = sb->s_blocksize;
+- buf->f_namelen = 255;
+-
+- if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
+- /* Do this if chunk size is not a power of 2 */
+-
+- uint64_t bytesInDev;
+- uint64_t bytesFree;
+-
+- bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) *
+- ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk));
+-
+- do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
+- buf->f_blocks = bytesInDev;
+-
+- bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
+- ((uint64_t)(dev->nDataBytesPerChunk));
+-
+- do_div(bytesFree, sb->s_blocksize);
+-
+- buf->f_bfree = bytesFree;
+-
+- } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
+-
+- buf->f_blocks =
+- (dev->endBlock - dev->startBlock + 1) *
+- dev->nChunksPerBlock /
+- (sb->s_blocksize / dev->nDataBytesPerChunk);
+- buf->f_bfree =
+- yaffs_GetNumberOfFreeChunks(dev) /
+- (sb->s_blocksize / dev->nDataBytesPerChunk);
+- } else {
+- buf->f_blocks =
+- (dev->endBlock - dev->startBlock + 1) *
+- dev->nChunksPerBlock *
+- (dev->nDataBytesPerChunk / sb->s_blocksize);
+-
+- buf->f_bfree =
+- yaffs_GetNumberOfFreeChunks(dev) *
+- (dev->nDataBytesPerChunk / sb->s_blocksize);
+- }
+-
+- buf->f_files = 0;
+- buf->f_ffree = 0;
+- buf->f_bavail = buf->f_bfree;
+-
+- yaffs_GrossUnlock(dev);
+- return 0;
+-}
+-
+-
+-static int yaffs_do_sync_fs(struct super_block *sb)
+-{
+-
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+- T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n"));
+-
+- if (sb->s_dirt) {
+- yaffs_GrossLock(dev);
+-
+- if (dev) {
+- yaffs_FlushEntireDeviceCache(dev);
+- yaffs_CheckpointSave(dev);
+- }
+-
+- yaffs_GrossUnlock(dev);
+-
+- sb->s_dirt = 0;
+- }
+- return 0;
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static void yaffs_write_super(struct super_block *sb)
+-#else
+-static int yaffs_write_super(struct super_block *sb)
+-#endif
+-{
+-
+- T(YAFFS_TRACE_OS, ("yaffs_write_super\n"));
+- if (yaffs_auto_checkpoint >= 2)
+- yaffs_do_sync_fs(sb);
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
+- return 0;
+-#endif
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_sync_fs(struct super_block *sb, int wait)
+-#else
+-static int yaffs_sync_fs(struct super_block *sb)
+-#endif
+-{
+- T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n"));
+-
+- if (yaffs_auto_checkpoint >= 1)
+- yaffs_do_sync_fs(sb);
+-
+- return 0;
+-}
+-
+-#ifdef YAFFS_USE_OWN_IGET
+-
+-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
+-{
+- struct inode *inode;
+- yaffs_Object *obj;
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_iget for %lu\n", ino));
+-
+- inode = iget_locked(sb, ino);
+- if (!inode)
+- return ERR_PTR(-ENOMEM);
+- if (!(inode->i_state & I_NEW))
+- return inode;
+-
+- /* NB This is called as a side effect of other functions, but
+- * we had to release the lock to prevent deadlocks, so
+- * need to lock again.
+- */
+-
+- yaffs_GrossLock(dev);
+-
+- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+-
+- yaffs_FillInodeFromObject(inode, obj);
+-
+- yaffs_GrossUnlock(dev);
+-
+- unlock_new_inode(inode);
+- return inode;
+-}
+-
+-#else
+-
+-static void yaffs_read_inode(struct inode *inode)
+-{
+- /* NB This is called as a side effect of other functions, but
+- * we had to release the lock to prevent deadlocks, so
+- * need to lock again.
+- */
+-
+- yaffs_Object *obj;
+- yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_read_inode for %d\n", (int)inode->i_ino));
+-
+- yaffs_GrossLock(dev);
+-
+- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+-
+- yaffs_FillInodeFromObject(inode, obj);
+-
+- yaffs_GrossUnlock(dev);
+-}
+-
+-#endif
+-
+-static YLIST_HEAD(yaffs_dev_list);
+-
+-#if 0 /* not used */
+-static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
+-{
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-
+- if (*flags & MS_RDONLY) {
+- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_remount_fs: %s: RO\n", dev->name));
+-
+- yaffs_GrossLock(dev);
+-
+- yaffs_FlushEntireDeviceCache(dev);
+-
+- yaffs_CheckpointSave(dev);
+-
+- if (mtd->sync)
+- mtd->sync(mtd);
+-
+- yaffs_GrossUnlock(dev);
+- } else {
+- T(YAFFS_TRACE_OS,
+- ("yaffs_remount_fs: %s: RW\n", dev->name));
+- }
+-
+- return 0;
+-}
+-#endif
+-
+-static void yaffs_put_super(struct super_block *sb)
+-{
+- yaffs_Device *dev = yaffs_SuperToDevice(sb);
+-
+- T(YAFFS_TRACE_OS, ("yaffs_put_super\n"));
+-
+- yaffs_GrossLock(dev);
+-
+- yaffs_FlushEntireDeviceCache(dev);
+-
+- yaffs_CheckpointSave(dev);
+-
+- if (dev->putSuperFunc)
+- dev->putSuperFunc(sb);
+-
+- yaffs_Deinitialise(dev);
+-
+- yaffs_GrossUnlock(dev);
+-
+- /* we assume this is protected by lock_kernel() in mount/umount */
+- ylist_del(&dev->devList);
+-
+- if (dev->spareBuffer) {
+- YFREE(dev->spareBuffer);
+- dev->spareBuffer = NULL;
+- }
+-
+- kfree(dev);
+-}
+-
+-
+-static void yaffs_MTDPutSuper(struct super_block *sb)
+-{
+- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
+-
+- if (mtd->sync)
+- mtd->sync(mtd);
+-
+- put_mtd_device(mtd);
+-}
+-
+-
+-static void yaffs_MarkSuperBlockDirty(void *vsb)
+-{
+- struct super_block *sb = (struct super_block *)vsb;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb));
+- if (sb)
+- sb->s_dirt = 1;
+-}
+-
+-typedef struct {
+- int inband_tags;
+- int skip_checkpoint_read;
+- int skip_checkpoint_write;
+- int no_cache;
+-} yaffs_options;
+-
+-#define MAX_OPT_LEN 20
+-static int yaffs_parse_options(yaffs_options *options, const char *options_str)
+-{
+- char cur_opt[MAX_OPT_LEN + 1];
+- int p;
+- int error = 0;
+-
+- /* Parse through the options which is a comma seperated list */
+-
+- while (options_str && *options_str && !error) {
+- memset(cur_opt, 0, MAX_OPT_LEN + 1);
+- p = 0;
+-
+- while (*options_str && *options_str != ',') {
+- if (p < MAX_OPT_LEN) {
+- cur_opt[p] = *options_str;
+- p++;
+- }
+- options_str++;
+- }
+-
+- if (!strcmp(cur_opt, "inband-tags"))
+- options->inband_tags = 1;
+- else if (!strcmp(cur_opt, "no-cache"))
+- options->no_cache = 1;
+- else if (!strcmp(cur_opt, "no-checkpoint-read"))
+- options->skip_checkpoint_read = 1;
+- else if (!strcmp(cur_opt, "no-checkpoint-write"))
+- options->skip_checkpoint_write = 1;
+- else if (!strcmp(cur_opt, "no-checkpoint")) {
+- options->skip_checkpoint_read = 1;
+- options->skip_checkpoint_write = 1;
+- } else {
+- printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
+- cur_opt);
+- error = 1;
+- }
+- }
+-
+- return error;
+-}
+-
+-static struct super_block *yaffs_internal_read_super(int yaffsVersion,
+- struct super_block *sb,
+- void *data, int silent)
+-{
+- int nBlocks;
+- struct inode *inode = NULL;
+- struct dentry *root;
+- yaffs_Device *dev = 0;
+- char devname_buf[BDEVNAME_SIZE + 1];
+- struct mtd_info *mtd;
+- int err;
+- char *data_str = (char *)data;
+-
+- yaffs_options options;
+-
+- sb->s_magic = YAFFS_MAGIC;
+- sb->s_op = &yaffs_super_ops;
+- sb->s_flags |= MS_NOATIME;
+-
+- if (!sb)
+- printk(KERN_INFO "yaffs: sb is NULL\n");
+- else if (!sb->s_dev)
+- printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
+- else if (!yaffs_devname(sb, devname_buf))
+- printk(KERN_INFO "yaffs: devname is NULL\n");
+- else
+- printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
+- sb->s_dev,
+- yaffs_devname(sb, devname_buf));
+-
+- if (!data_str)
+- data_str = "";
+-
+- printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
+-
+- memset(&options, 0, sizeof(options));
+-
+- if (yaffs_parse_options(&options, data_str)) {
+- /* Option parsing failed */
+- return NULL;
+- }
+-
+-
+- sb->s_blocksize = PAGE_CACHE_SIZE;
+- sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+- T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
+- T(YAFFS_TRACE_OS,
+- ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize)));
+-
+-#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
+- T(YAFFS_TRACE_OS,
+- ("yaffs: Write verification disabled. All guarantees "
+- "null and void\n"));
+-#endif
+-
+- T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
+- "\"%s\"\n",
+- MAJOR(sb->s_dev), MINOR(sb->s_dev),
+- yaffs_devname(sb, devname_buf)));
+-
+- /* Check it's an mtd device..... */
+- if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
+- return NULL; /* This isn't an mtd device */
+-
+- /* Get the device */
+- mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
+- if (!mtd) {
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device #%u doesn't appear to exist\n",
+- MINOR(sb->s_dev)));
+- return NULL;
+- }
+- /* Check it's NAND */
+- if (mtd->type != MTD_NANDFLASH) {
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
+- return NULL;
+- }
+-
+- T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase));
+- T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
+- T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
+- T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
+- T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
+- T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
+- T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
+- T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
+- T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize));
+- T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize));
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
+- T(YAFFS_TRACE_OS, (" size %u\n", mtd->size));
+-#else
+- T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size));
+-#endif
+-
+-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
+-
+- if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
+- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n"));
+- yaffsVersion = 2;
+- }
+-
+- /* Added NCB 26/5/2006 for completeness */
+- if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
+- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n"));
+- yaffsVersion = 1;
+- }
+-
+-#endif
+-
+- if (yaffsVersion == 2) {
+- /* Check for version 2 style functions */
+- if (!mtd->erase ||
+- !mtd->block_isbad ||
+- !mtd->block_markbad ||
+- !mtd->read ||
+- !mtd->write ||
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+- !mtd->read_oob || !mtd->write_oob) {
+-#else
+- !mtd->write_ecc ||
+- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+-#endif
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device does not support required "
+- "functions\n"));;
+- return NULL;
+- }
+-
+- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
+- !options.inband_tags) {
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device does not have the "
+- "right page sizes\n"));
+- return NULL;
+- }
+- } else {
+- /* Check for V1 style functions */
+- if (!mtd->erase ||
+- !mtd->read ||
+- !mtd->write ||
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+- !mtd->read_oob || !mtd->write_oob) {
+-#else
+- !mtd->write_ecc ||
+- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+-#endif
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device does not support required "
+- "functions\n"));;
+- return NULL;
+- }
+-
+- if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
+- mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs: MTD device does not support have the "
+- "right page sizes\n"));
+- return NULL;
+- }
+- }
+-
+- /* OK, so if we got here, we have an MTD that's NAND and looks
+- * like it has the right capabilities
+- * Set the yaffs_Device up for mtd
+- */
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+- sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
+-#else
+- sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
+-#endif
+- if (!dev) {
+- /* Deep shit could not allocate device structure */
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs_read_super: Failed trying to allocate "
+- "yaffs_Device. \n"));
+- return NULL;
+- }
+-
+- memset(dev, 0, sizeof(yaffs_Device));
+- dev->genericDevice = mtd;
+- dev->name = mtd->name;
+-
+- /* Set up the memory size parameters.... */
+-
+- nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
+-
+- dev->startBlock = 0;
+- dev->endBlock = nBlocks - 1;
+- dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+- dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+- dev->nReservedBlocks = 5;
+- dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
+- dev->inbandTags = options.inband_tags;
+-
+- /* ... and the functions. */
+- if (yaffsVersion == 2) {
+- dev->writeChunkWithTagsToNAND =
+- nandmtd2_WriteChunkWithTagsToNAND;
+- dev->readChunkWithTagsFromNAND =
+- nandmtd2_ReadChunkWithTagsFromNAND;
+- dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
+- dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
+- dev->spareBuffer = YMALLOC(mtd->oobsize);
+- dev->isYaffs2 = 1;
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+- dev->totalBytesPerChunk = mtd->writesize;
+- dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
+-#else
+- dev->totalBytesPerChunk = mtd->oobblock;
+- dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
+-#endif
+- nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
+-
+- dev->startBlock = 0;
+- dev->endBlock = nBlocks - 1;
+- } else {
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+- /* use the MTD interface in yaffs_mtdif1.c */
+- dev->writeChunkWithTagsToNAND =
+- nandmtd1_WriteChunkWithTagsToNAND;
+- dev->readChunkWithTagsFromNAND =
+- nandmtd1_ReadChunkWithTagsFromNAND;
+- dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
+- dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
+-#else
+- dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
+- dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
+-#endif
+- dev->isYaffs2 = 0;
+- }
+- /* ... and common functions */
+- dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
+- dev->initialiseNAND = nandmtd_InitialiseNAND;
+-
+- dev->putSuperFunc = yaffs_MTDPutSuper;
+-
+- dev->superBlock = (void *)sb;
+- dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
+-
+-
+-#ifndef CONFIG_YAFFS_DOES_ECC
+- dev->useNANDECC = 1;
+-#endif
+-
+-#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
+- dev->wideTnodesDisabled = 1;
+-#endif
+-
+- dev->skipCheckpointRead = options.skip_checkpoint_read;
+- dev->skipCheckpointWrite = options.skip_checkpoint_write;
+-
+- /* we assume this is protected by lock_kernel() in mount/umount */
+- ylist_add_tail(&dev->devList, &yaffs_dev_list);
+-
+- init_MUTEX(&dev->grossLock);
+-
+- yaffs_GrossLock(dev);
+-
+- err = yaffs_GutsInitialise(dev);
+-
+- T(YAFFS_TRACE_OS,
+- ("yaffs_read_super: guts initialised %s\n",
+- (err == YAFFS_OK) ? "OK" : "FAILED"));
+-
+- /* Release lock before yaffs_get_inode() */
+- yaffs_GrossUnlock(dev);
+-
+- /* Create root inode */
+- if (err == YAFFS_OK)
+- inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
+- yaffs_Root(dev));
+-
+- if (!inode)
+- return NULL;
+-
+- inode->i_op = &yaffs_dir_inode_operations;
+- inode->i_fop = &yaffs_dir_operations;
+-
+- T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n"));
+-
+- root = d_alloc_root(inode);
+-
+- T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n"));
+-
+- if (!root) {
+- iput(inode);
+- return NULL;
+- }
+- sb->s_root = root;
+- sb->s_dirt = !dev->isCheckpointed;
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed));
+-
+- T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n"));
+- return sb;
+-}
+-
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
+- int silent)
+-{
+- return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs_read_super(struct file_system_type *fs,
+- int flags, const char *dev_name,
+- void *data, struct vfsmount *mnt)
+-{
+-
+- return get_sb_bdev(fs, flags, dev_name, data,
+- yaffs_internal_read_super_mtd, mnt);
+-}
+-#else
+-static struct super_block *yaffs_read_super(struct file_system_type *fs,
+- int flags, const char *dev_name,
+- void *data)
+-{
+-
+- return get_sb_bdev(fs, flags, dev_name, data,
+- yaffs_internal_read_super_mtd);
+-}
+-#endif
+-
+-static struct file_system_type yaffs_fs_type = {
+- .owner = THIS_MODULE,
+- .name = "yaffs",
+- .get_sb = yaffs_read_super,
+- .kill_sb = kill_block_super,
+- .fs_flags = FS_REQUIRES_DEV,
+-};
+-#else
+-static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
+- int silent)
+-{
+- return yaffs_internal_read_super(1, sb, data, silent);
+-}
+-
+-static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
+- FS_REQUIRES_DEV);
+-#endif
+-
+-
+-#ifdef CONFIG_YAFFS_YAFFS2
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+-static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
+- int silent)
+-{
+- return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
+-}
+-
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+-static int yaffs2_read_super(struct file_system_type *fs,
+- int flags, const char *dev_name, void *data,
+- struct vfsmount *mnt)
+-{
+- return get_sb_bdev(fs, flags, dev_name, data,
+- yaffs2_internal_read_super_mtd, mnt);
+-}
+-#else
+-static struct super_block *yaffs2_read_super(struct file_system_type *fs,
+- int flags, const char *dev_name,
+- void *data)
+-{
+-
+- return get_sb_bdev(fs, flags, dev_name, data,
+- yaffs2_internal_read_super_mtd);
+-}
+-#endif
+-
+-static struct file_system_type yaffs2_fs_type = {
+- .owner = THIS_MODULE,
+- .name = "yaffs2",
+- .get_sb = yaffs2_read_super,
+- .kill_sb = kill_block_super,
+- .fs_flags = FS_REQUIRES_DEV,
+-};
+-#else
+-static struct super_block *yaffs2_read_super(struct super_block *sb,
+- void *data, int silent)
+-{
+- return yaffs_internal_read_super(2, sb, data, silent);
+-}
+-
+-static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
+- FS_REQUIRES_DEV);
+-#endif
+-
+-#endif /* CONFIG_YAFFS_YAFFS2 */
+-
+-static struct proc_dir_entry *my_proc_entry;
+-
+-static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
+-{
+- buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
+- buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
+- buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk);
+- buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
+- buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
+- buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
+- buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
+- buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
+- buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
+- buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated);
+- buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes);
+- buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated);
+- buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects);
+- buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
+- buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites);
+- buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads);
+- buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures);
+- buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies);
+- buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections);
+- buf += sprintf(buf, "passiveGCs......... %d\n",
+- dev->passiveGarbageCollections);
+- buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites);
+- buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
+- buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks);
+- buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed);
+- buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed);
+- buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed);
+- buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed);
+- buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits);
+- buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles);
+- buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles);
+- buf +=
+- sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions);
+- buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC);
+- buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2);
+- buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags);
+-
+- return buf;
+-}
+-
+-static int yaffs_proc_read(char *page,
+- char **start,
+- off_t offset, int count, int *eof, void *data)
+-{
+- struct ylist_head *item;
+- char *buf = page;
+- int step = offset;
+- int n = 0;
+-
+- /* Get proc_file_read() to step 'offset' by one on each sucessive call.
+- * We use 'offset' (*ppos) to indicate where we are in devList.
+- * This also assumes the user has posted a read buffer large
+- * enough to hold the complete output; but that's life in /proc.
+- */
+-
+- *(int *)start = 1;
+-
+- /* Print header first */
+- if (step == 0) {
+- buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
+- "\n%s\n%s\n", yaffs_fs_c_version,
+- yaffs_guts_c_version);
+- }
+-
+- /* hold lock_kernel while traversing yaffs_dev_list */
+- lock_kernel();
+-
+- /* Locate and print the Nth entry. Order N-squared but N is small. */
+- ylist_for_each(item, &yaffs_dev_list) {
+- yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList);
+- if (n < step) {
+- n++;
+- continue;
+- }
+- buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
+- buf = yaffs_dump_dev(buf, dev);
+- break;
+- }
+- unlock_kernel();
+-
+- return buf - page < count ? buf - page : count;
+-}
+-
+-/**
+- * Set the verbosity of the warnings and error messages.
+- *
+- * Note that the names can only be a..z or _ with the current code.
+- */
+-
+-static struct {
+- char *mask_name;
+- unsigned mask_bitfield;
+-} mask_flags[] = {
+- {"allocate", YAFFS_TRACE_ALLOCATE},
+- {"always", YAFFS_TRACE_ALWAYS},
+- {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
+- {"buffers", YAFFS_TRACE_BUFFERS},
+- {"bug", YAFFS_TRACE_BUG},
+- {"checkpt", YAFFS_TRACE_CHECKPOINT},
+- {"deletion", YAFFS_TRACE_DELETION},
+- {"erase", YAFFS_TRACE_ERASE},
+- {"error", YAFFS_TRACE_ERROR},
+- {"gc_detail", YAFFS_TRACE_GC_DETAIL},
+- {"gc", YAFFS_TRACE_GC},
+- {"mtd", YAFFS_TRACE_MTD},
+- {"nandaccess", YAFFS_TRACE_NANDACCESS},
+- {"os", YAFFS_TRACE_OS},
+- {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
+- {"scan", YAFFS_TRACE_SCAN},
+- {"tracing", YAFFS_TRACE_TRACING},
+-
+- {"verify", YAFFS_TRACE_VERIFY},
+- {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
+- {"verify_full", YAFFS_TRACE_VERIFY_FULL},
+- {"verify_all", YAFFS_TRACE_VERIFY_ALL},
+-
+- {"write", YAFFS_TRACE_WRITE},
+- {"all", 0xffffffff},
+- {"none", 0},
+- {NULL, 0},
+-};
+-
+-#define MAX_MASK_NAME_LENGTH 40
+-static int yaffs_proc_write(struct file *file, const char *buf,
+- unsigned long count, void *data)
+-{
+- unsigned rg = 0, mask_bitfield;
+- char *end;
+- char *mask_name;
+- const char *x;
+- char substring[MAX_MASK_NAME_LENGTH + 1];
+- int i;
+- int done = 0;
+- int add, len = 0;
+- int pos = 0;
+-
+- rg = yaffs_traceMask;
+-
+- while (!done && (pos < count)) {
+- done = 1;
+- while ((pos < count) && isspace(buf[pos]))
+- pos++;
+-
+- switch (buf[pos]) {
+- case '+':
+- case '-':
+- case '=':
+- add = buf[pos];
+- pos++;
+- break;
+-
+- default:
+- add = ' ';
+- break;
+- }
+- mask_name = NULL;
+-
+- mask_bitfield = simple_strtoul(buf + pos, &end, 0);
+-
+- if (end > buf + pos) {
+- mask_name = "numeral";
+- len = end - (buf + pos);
+- pos += len;
+- done = 0;
+- } else {
+- for (x = buf + pos, i = 0;
+- (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
+- i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
+- substring[i] = *x;
+- substring[i] = '\0';
+-
+- for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+- if (strcmp(substring, mask_flags[i].mask_name) == 0) {
+- mask_name = mask_flags[i].mask_name;
+- mask_bitfield = mask_flags[i].mask_bitfield;
+- done = 0;
+- break;
+- }
+- }
+- }
+-
+- if (mask_name != NULL) {
+- done = 0;
+- switch (add) {
+- case '-':
+- rg &= ~mask_bitfield;
+- break;
+- case '+':
+- rg |= mask_bitfield;
+- break;
+- case '=':
+- rg = mask_bitfield;
+- break;
+- default:
+- rg |= mask_bitfield;
+- break;
+- }
+- }
+- }
+-
+- yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
+-
+- printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
+-
+- if (rg & YAFFS_TRACE_ALWAYS) {
+- for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+- char flag;
+- flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
+- printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
+- }
+- }
+-
+- return count;
+-}
+-
+-/* Stuff to handle installation of file systems */
+-struct file_system_to_install {
+- struct file_system_type *fst;
+- int installed;
+-};
+-
+-static struct file_system_to_install fs_to_install[] = {
+- {&yaffs_fs_type, 0},
+- {&yaffs2_fs_type, 0},
+- {NULL, 0}
+-};
+-
+-static int __init init_yaffs_fs(void)
+-{
+- int error = 0;
+- struct file_system_to_install *fsinst;
+-
+- T(YAFFS_TRACE_ALWAYS,
+- ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
+-
+- /* Install the proc_fs entry */
+- my_proc_entry = create_proc_entry("yaffs",
+- S_IRUGO | S_IFREG,
+- YPROC_ROOT);
+-
+- if (my_proc_entry) {
+- my_proc_entry->write_proc = yaffs_proc_write;
+- my_proc_entry->read_proc = yaffs_proc_read;
+- my_proc_entry->data = NULL;
+- } else
+- return -ENOMEM;
+-
+- /* Now add the file system entries */
+-
+- fsinst = fs_to_install;
+-
+- while (fsinst->fst && !error) {
+- error = register_filesystem(fsinst->fst);
+- if (!error)
+- fsinst->installed = 1;
+- fsinst++;
+- }
+-
+- /* Any errors? uninstall */
+- if (error) {
+- fsinst = fs_to_install;
+-
+- while (fsinst->fst) {
+- if (fsinst->installed) {
+- unregister_filesystem(fsinst->fst);
+- fsinst->installed = 0;
+- }
+- fsinst++;
+- }
+- }
+-
+- return error;
+-}
+-
+-static void __exit exit_yaffs_fs(void)
+-{
+-
+- struct file_system_to_install *fsinst;
+-
+- T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
+- " removing. \n"));
+-
+- remove_proc_entry("yaffs", YPROC_ROOT);
+-
+- fsinst = fs_to_install;
+-
+- while (fsinst->fst) {
+- if (fsinst->installed) {
+- unregister_filesystem(fsinst->fst);
+- fsinst->installed = 0;
+- }
+- fsinst++;
+- }
+-}
+-
+-module_init(init_yaffs_fs)
+-module_exit(exit_yaffs_fs)
+-
+-MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
+-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006");
+-MODULE_LICENSE("GPL");
+diff -Nrup a/fs/yaffs2/yaffs_getblockinfo.h b/fs/yaffs2/yaffs_getblockinfo.h
+--- a/fs/yaffs2/yaffs_getblockinfo.h 2010-10-03 17:48:22.710000363 +0300
++++ b/fs/yaffs2/yaffs_getblockinfo.h 2010-10-03 18:03:47.542000362 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -17,6 +17,7 @@
+ #define __YAFFS_GETBLOCKINFO_H__
+
+ #include "yaffs_guts.h"
++#include "yaffs_trace.h"
+
+ /* Function to manipulate block info */
+ static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk)
+diff -Nrup a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c
+--- a/fs/yaffs2/yaffs_guts.c 2010-10-03 17:48:22.715000364 +0300
++++ b/fs/yaffs2/yaffs_guts.c 2010-10-03 18:03:47.518000364 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -10,11 +10,8 @@
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+-
+-const char *yaffs_guts_c_version =
+- "$Id: yaffs_guts.c,v 1.82 2009-03-09 04:24:17 charles Exp $";
+-
+ #include "yportenv.h"
++#include "yaffs_trace.h"
+
+ #include "yaffsinterface.h"
+ #include "yaffs_guts.h"
+@@ -22,22 +19,28 @@ const char *yaffs_guts_c_version =
+ #include "yaffs_getblockinfo.h"
+
+ #include "yaffs_tagscompat.h"
+-#ifndef CONFIG_YAFFS_USE_OWN_SORT
+-#include "yaffs_qsort.h"
+-#endif
++
+ #include "yaffs_nand.h"
+
+-#include "yaffs_checkptrw.h"
++#include "yaffs_yaffs1.h"
++#include "yaffs_yaffs2.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_verify.h"
+
+ #include "yaffs_nand.h"
+ #include "yaffs_packedtags2.h"
+
++#include "yaffs_nameval.h"
++#include "yaffs_allocator.h"
+
+-#define YAFFS_PASSIVE_GC_CHUNKS 2
++/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */
++#define YAFFS_GC_GOOD_ENOUGH 2
++#define YAFFS_GC_PASSIVE_THRESHOLD 4
+
+ #include "yaffs_ecc.h"
+
+
++
+ /* Robustification (if it ever comes about...) */
+ static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
+ static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
+@@ -49,33 +52,26 @@ static void yaffs_HandleUpdateChunk(yaff
+ const yaffs_ExtendedTags *tags);
+
+ /* Other local prototypes */
++static void yaffs_UpdateParent(yaffs_Object *obj);
+ static int yaffs_UnlinkObject(yaffs_Object *obj);
+ static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
+
+-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
+-
+ static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
+ const __u8 *buffer,
+ yaffs_ExtendedTags *tags,
+ int useReserve);
+-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+- int chunkInNAND, int inScan);
++
+
+ static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+ yaffs_ObjectType type);
+-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+- yaffs_Object *obj);
+-static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
+- int force, int isShrink, int shadows);
++
++
++static int yaffs_ApplyXMod(yaffs_Object *obj, char *buffer, yaffs_XAttrMod *xmod);
++
+ static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
+ static int yaffs_CheckStructures(void);
+-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+- int chunkOffset, int *limit);
+ static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
+
+-static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
+-
+-
+ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+ int chunkInNAND);
+
+@@ -87,30 +83,22 @@ static int yaffs_TagsMatch(const yaffs_E
+ static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+ yaffs_BlockInfo **blockUsedPtr);
+
+-static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
+-
+ static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
+
+-static void yaffs_VerifyDirectory(yaffs_Object *directory);
+-#ifdef YAFFS_PARANOID
+-static int yaffs_CheckFileSanity(yaffs_Object *in);
+-#else
+-#define yaffs_CheckFileSanity(in)
+-#endif
+-
+ static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
+ static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
+
+-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
+-
+ static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+ yaffs_ExtendedTags *tags);
+
+-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+- unsigned pos);
+-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+- yaffs_FileStructure *fStruct,
+- __u32 chunkId);
++static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
++ int chunkInNAND,
++ const __u8 *data,
++ yaffs_ExtendedTags *tags);
++
++
++static void yaffs_LoadNameFromObjectHeader(yaffs_Device *dev,YCHAR *name, const YCHAR *ohName, int bufferSize);
++static void yaffs_LoadObjectHeaderFromName(yaffs_Device *dev,YCHAR *ohName, const YCHAR *name);
+
+
+ /* Function to calculate chunk and offset */
+@@ -172,7 +160,7 @@ static __u32 ShiftsGE(__u32 x)
+
+ static __u32 Shifts(__u32 x)
+ {
+- int nShifts;
++ __u32 nShifts;
+
+ nShifts = 0;
+
+@@ -203,7 +191,7 @@ static int yaffs_InitialiseTempBuffers(y
+ for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
+ dev->tempBuffer[i].line = 0; /* not in use */
+ dev->tempBuffer[i].buffer = buf =
+- YMALLOC_DMA(dev->totalBytesPerChunk);
++ YMALLOC_DMA(dev->param.totalBytesPerChunk);
+ }
+
+ return buf ? YAFFS_OK : YAFFS_FAIL;
+@@ -286,7 +274,7 @@ int yaffs_IsManagedTempBuffer(yaffs_Devi
+ return 1;
+ }
+
+- for (i = 0; i < dev->nShortOpCaches; i++) {
++ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].data == buffer)
+ return 1;
+ }
+@@ -299,6374 +287,4183 @@ int yaffs_IsManagedTempBuffer(yaffs_Devi
+ return 0;
+ }
+
+-
+-
+ /*
+- * Chunk bitmap manipulations
++ * Verification code
+ */
+
+-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
+-{
+- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
+- blk));
+- YBUG();
+- }
+- return dev->chunkBits +
+- (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
+-}
+
+-static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
+-{
+- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
+- chunk < 0 || chunk >= dev->nChunksPerBlock) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
+- blk, chunk));
+- YBUG();
+- }
+-}
+
+-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
+-{
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+
+- memset(blkBits, 0, dev->chunkBitmapStride);
+-}
++/*
++ * Simple hash function. Needs to have a reasonable spread
++ */
+
+-static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
++static Y_INLINE int yaffs_HashFunction(int n)
+ {
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+-
+- yaffs_VerifyChunkBitId(dev, blk, chunk);
+-
+- blkBits[chunk / 8] &= ~(1 << (chunk & 7));
++ n = abs(n);
++ return n % YAFFS_NOBJECT_BUCKETS;
+ }
+
+-static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
+-{
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+-
+- yaffs_VerifyChunkBitId(dev, blk, chunk);
+-
+- blkBits[chunk / 8] |= (1 << (chunk & 7));
+-}
++/*
++ * Access functions to useful fake objects.
++ * Note that root might have a presence in NAND if permissions are set.
++ */
+
+-static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
++yaffs_Object *yaffs_Root(yaffs_Device *dev)
+ {
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+- yaffs_VerifyChunkBitId(dev, blk, chunk);
+-
+- return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
++ return dev->rootDir;
+ }
+
+-static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
++yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
+ {
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+- int i;
+- for (i = 0; i < dev->chunkBitmapStride; i++) {
+- if (*blkBits)
+- return 1;
+- blkBits++;
+- }
+- return 0;
++ return dev->lostNFoundDir;
+ }
+
+-static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
+-{
+- __u8 *blkBits = yaffs_BlockBits(dev, blk);
+- int i;
+- int n = 0;
+- for (i = 0; i < dev->chunkBitmapStride; i++) {
+- __u8 x = *blkBits;
+- while (x) {
+- if (x & 1)
+- n++;
+- x >>= 1;
+- }
+-
+- blkBits++;
+- }
+- return n;
+-}
+
+ /*
+- * Verification code
++ * Erased NAND checking functions
+ */
+
+-static int yaffs_SkipVerification(yaffs_Device *dev)
+-{
+- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
+-}
+-
+-static int yaffs_SkipFullVerification(yaffs_Device *dev)
+-{
+- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
+-}
+-
+-static int yaffs_SkipNANDVerification(yaffs_Device *dev)
++int yaffs_CheckFF(__u8 *buffer, int nBytes)
+ {
+- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
++ /* Horrible, slow implementation */
++ while (nBytes--) {
++ if (*buffer != 0xFF)
++ return 0;
++ buffer++;
++ }
++ return 1;
+ }
+
+-static const char *blockStateName[] = {
+-"Unknown",
+-"Needs scanning",
+-"Scanning",
+-"Empty",
+-"Allocating",
+-"Full",
+-"Dirty",
+-"Checkpoint",
+-"Collecting",
+-"Dead"
+-};
+-
+-static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
++static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
++ int chunkInNAND)
+ {
+- int actuallyUsed;
+- int inUse;
++ int retval = YAFFS_OK;
++ __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
++ yaffs_ExtendedTags tags;
++ int result;
+
+- if (yaffs_SkipVerification(dev))
+- return;
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
+
+- /* Report illegal runtime states */
+- if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
+- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
++ if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
++ retval = YAFFS_FAIL;
+
+- switch (bi->blockState) {
+- case YAFFS_BLOCK_STATE_UNKNOWN:
+- case YAFFS_BLOCK_STATE_SCANNING:
+- case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
+- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
+- n, blockStateName[bi->blockState]));
++ if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
++ T(YAFFS_TRACE_NANDACCESS,
++ (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
++ retval = YAFFS_FAIL;
+ }
+
+- /* Check pages in use and soft deletions are legal */
+-
+- actuallyUsed = bi->pagesInUse - bi->softDeletions;
+-
+- if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
+- bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
+- actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
+- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
+- n, bi->pagesInUse, bi->softDeletions));
+-
++ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
+
+- /* Check chunk bitmap legal */
+- inUse = yaffs_CountChunkBits(dev, n);
+- if (inUse != bi->pagesInUse)
+- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
+- n, bi->pagesInUse, inUse));
++ return retval;
+
+- /* Check that the sequence number is valid.
+- * Ten million is legal, but is very unlikely
+- */
+- if (dev->isYaffs2 &&
+- (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
+- (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
+- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
+- n, bi->sequenceNumber));
+ }
+
+-static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
+- int n)
++
++static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
++ int chunkInNAND,
++ const __u8 *data,
++ yaffs_ExtendedTags *tags)
+ {
+- yaffs_VerifyBlock(dev, bi, n);
++ int retval = YAFFS_OK;
++ yaffs_ExtendedTags tempTags;
++ __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
++ int result;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,&tempTags);
++ if(memcmp(buffer,data,dev->nDataBytesPerChunk) ||
++ tempTags.objectId != tags->objectId ||
++ tempTags.chunkId != tags->chunkId ||
++ tempTags.byteCount != tags->byteCount)
++ retval = YAFFS_FAIL;
+
+- /* After collection the block should be in the erased state */
+- /* This will need to change if we do partial gc */
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+
+- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
+- bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
+- T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
+- n, bi->blockState));
+- }
++ return retval;
+ }
+
+-static void yaffs_VerifyBlocks(yaffs_Device *dev)
++static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
++ const __u8 *data,
++ yaffs_ExtendedTags *tags,
++ int useReserve)
+ {
+- int i;
+- int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
+- int nIllegalBlockStates = 0;
+-
+- if (yaffs_SkipVerification(dev))
+- return;
+-
+- memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
+-
+- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
+- yaffs_VerifyBlock(dev, bi, i);
+-
+- if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
+- nBlocksPerState[bi->blockState]++;
+- else
+- nIllegalBlockStates++;
+- }
++ int attempts = 0;
++ int writeOk = 0;
++ int chunk;
+
+- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
+- T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
++ yaffs2_InvalidateCheckpoint(dev);
+
+- T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
+- if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
+- T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
++ do {
++ yaffs_BlockInfo *bi = 0;
++ int erasedOk = 0;
+
+- for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("%s %d blocks"TENDSTR),
+- blockStateName[i], nBlocksPerState[i]));
++ chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
++ if (chunk < 0) {
++ /* no space */
++ break;
++ }
+
+- if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
+- dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
++ /* First check this chunk is erased, if it needs
++ * checking. The checking policy (unless forced
++ * always on) is as follows:
++ *
++ * Check the first page we try to write in a block.
++ * If the check passes then we don't need to check any
++ * more. If the check fails, we check again...
++ * If the block has been erased, we don't need to check.
++ *
++ * However, if the block has been prioritised for gc,
++ * then we think there might be something odd about
++ * this block and stop using it.
++ *
++ * Rationale: We should only ever see chunks that have
++ * not been erased if there was a partially written
++ * chunk due to power loss. This checking policy should
++ * catch that case with very few checks and thus save a
++ * lot of checks that are most likely not needed.
++ *
++ * Mods to the above
++ * If an erase check fails or the write fails we skip the
++ * rest of the block.
++ */
+
+- if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
+- dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
++ /* let's give it a try */
++ attempts++;
+
+- if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
+- nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
++ if(dev->param.alwaysCheckErased)
++ bi->skipErasedCheck = 0;
+
+- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++ if (!bi->skipErasedCheck) {
++ erasedOk = yaffs_CheckChunkErased(dev, chunk);
++ if (erasedOk != YAFFS_OK) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs chunk %d was not erased"
++ TENDSTR), chunk));
+
+-}
++ /* If not erased, delete this one,
++ * skip rest of block and
++ * try another chunk */
++ yaffs_DeleteChunk(dev,chunk,1,__LINE__);
++ yaffs_SkipRestOfBlock(dev);
++ continue;
++ }
++ }
+
+-/*
+- * Verify the object header. oh must be valid, but obj and tags may be NULL in which
+- * case those tests will not be performed.
+- */
+-static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
+-{
+- if (obj && yaffs_SkipVerification(obj->myDev))
+- return;
++ writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
++ data, tags);
+
+- if (!(tags && obj && oh)) {
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
+- (__u32)tags, (__u32)obj, (__u32)oh));
+- return;
+- }
++ if(!bi->skipErasedCheck)
++ writeOk = yaffs_VerifyChunkWritten(dev, chunk, data, tags);
+
+- if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
+- oh->type > YAFFS_OBJECT_TYPE_MAX)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
+- tags->objectId, oh->type));
++ if (writeOk != YAFFS_OK) {
++ /* Clean up aborted write, skip to next block and
++ * try another chunk */
++ yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
++ continue;
++ }
+
+- if (tags->objectId != obj->objectId)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
+- tags->objectId, obj->objectId));
++ bi->skipErasedCheck = 1;
+
++ /* Copy the data into the robustification buffer */
++ yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
+
+- /*
+- * Check that the object's parent ids match if parentCheck requested.
+- *
+- * Tests do not apply to the root object.
+- */
++ } while (writeOk != YAFFS_OK &&
++ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
+
+- if (parentCheck && tags->objectId > 1 && !obj->parent)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
+- tags->objectId, oh->parentObjectId));
++ if (!writeOk)
++ chunk = -1;
+
+- if (parentCheck && obj->parent &&
+- oh->parentObjectId != obj->parent->objectId &&
+- (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
+- obj->parent->objectId != YAFFS_OBJECTID_DELETED))
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
+- tags->objectId, oh->parentObjectId, obj->parent->objectId));
++ if (attempts > 1) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("**>> yaffs write required %d attempts" TENDSTR),
++ attempts));
+
+- if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d header name is NULL"TENDSTR),
+- obj->objectId));
++ dev->nRetriedWrites += (attempts - 1);
++ }
+
+- if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d header name is 0xFF"TENDSTR),
+- obj->objectId));
++ return chunk;
+ }
+
+
++
++/*
++ * Block retiring for handling a broken block.
++ */
+
+-static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
+- __u32 level, int chunkOffset)
++static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
+ {
+- int i;
+- yaffs_Device *dev = obj->myDev;
+- int ok = 1;
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+
+- if (tn) {
+- if (level > 0) {
++ yaffs2_InvalidateCheckpoint(dev);
++
++ yaffs2_ClearOldestDirtySequence(dev,bi);
+
+- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+- if (tn->internal[i]) {
+- ok = yaffs_VerifyTnodeWorker(obj,
+- tn->internal[i],
+- level - 1,
+- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+- }
+- }
+- } else if (level == 0) {
++ if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
++ if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR(
++ "yaffs: Failed to mark bad and erase block %d"
++ TENDSTR), blockInNAND));
++ } else {
+ yaffs_ExtendedTags tags;
+- __u32 objectId = obj->objectId;
++ int chunkId = blockInNAND * dev->param.nChunksPerBlock;
+
+- chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
++ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+- for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
+- __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ memset(buffer, 0xff, dev->nDataBytesPerChunk);
++ yaffs_InitialiseTags(&tags);
++ tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
++ if (dev->param.writeChunkWithTagsToNAND(dev, chunkId -
++ dev->chunkOffset, buffer, &tags) != YAFFS_OK)
++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
++ TCONT("write bad block marker to block %d")
++ TENDSTR), blockInNAND));
+
+- if (theChunk > 0) {
+- /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
+- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
+- if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
+- T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+- objectId, chunkOffset, theChunk,
+- tags.objectId, tags.chunkId));
+- }
+- }
+- chunkOffset++;
+- }
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+ }
+ }
+
+- return ok;
++ bi->blockState = YAFFS_BLOCK_STATE_DEAD;
++ bi->gcPrioritise = 0;
++ bi->needsRetiring = 0;
+
++ dev->nRetiredBlocks++;
+ }
+
++/*
++ * Functions for robustisizing TODO
++ *
++ */
+
+-static void yaffs_VerifyFile(yaffs_Object *obj)
++static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
++ const __u8 *data,
++ const yaffs_ExtendedTags *tags)
+ {
+- int requiredTallness;
+- int actualTallness;
+- __u32 lastChunk;
+- __u32 x;
+- __u32 i;
+- yaffs_Device *dev;
+- yaffs_ExtendedTags tags;
+- yaffs_Tnode *tn;
+- __u32 objectId;
++ dev=dev;
++ chunkInNAND=chunkInNAND;
++ data=data;
++ tags=tags;
++}
+
+- if (!obj)
+- return;
++static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
++ const yaffs_ExtendedTags *tags)
++{
++ dev=dev;
++ chunkInNAND=chunkInNAND;
++ tags=tags;
++}
+
+- if (yaffs_SkipVerification(obj->myDev))
+- return;
++void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
++{
++ if (!bi->gcPrioritise) {
++ bi->gcPrioritise = 1;
++ dev->hasPendingPrioritisedGCs = 1;
++ bi->chunkErrorStrikes++;
+
+- dev = obj->myDev;
+- objectId = obj->objectId;
++ if (bi->chunkErrorStrikes > 3) {
++ bi->needsRetiring = 1; /* Too many stikes, so retire this */
++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
+
+- /* Check file size is consistent with tnode depth */
+- lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
+- x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
+- requiredTallness = 0;
+- while (x > 0) {
+- x >>= YAFFS_TNODES_INTERNAL_BITS;
+- requiredTallness++;
++ }
+ }
++}
++
++static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
++ int erasedOk)
++{
++ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+
+- actualTallness = obj->variant.fileVariant.topLevel;
++ yaffs_HandleChunkError(dev, bi);
+
+- if (requiredTallness > actualTallness)
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
+- obj->objectId, actualTallness, requiredTallness));
++ if (erasedOk) {
++ /* Was an actual write failure, so mark the block for retirement */
++ bi->needsRetiring = 1;
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
++ }
++
++ /* Delete the chunk */
++ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
++ yaffs_SkipRestOfBlock(dev);
++}
+
+
+- /* Check that the chunks in the tnode tree are all correct.
+- * We do this by scanning through the tnode tree and
+- * checking the tags for every chunk match.
+- */
++/*---------------- Name handling functions ------------*/
+
+- if (yaffs_SkipNANDVerification(dev))
+- return;
++static __u16 yaffs_CalcNameSum(const YCHAR *name)
++{
++ __u16 sum = 0;
++ __u16 i = 1;
+
+- for (i = 1; i <= lastChunk; i++) {
+- tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
++ const YUCHAR *bname = (const YUCHAR *) name;
++ if (bname) {
++ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
+
+- if (tn) {
+- __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+- if (theChunk > 0) {
+- /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
+- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
+- if (tags.objectId != objectId || tags.chunkId != i) {
+- T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
+- objectId, i, theChunk,
+- tags.objectId, tags.chunkId));
+- }
+- }
++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
++ sum += yaffs_toupper(*bname) * i;
++#else
++ sum += (*bname) * i;
++#endif
++ i++;
++ bname++;
+ }
+ }
++ return sum;
+ }
+
+-
+-static void yaffs_VerifyHardLink(yaffs_Object *obj)
++void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
+ {
+- if (obj && yaffs_SkipVerification(obj->myDev))
+- return;
++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
++ memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
++ if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH)
++ yaffs_strcpy(obj->shortName, name);
++ else
++ obj->shortName[0] = _Y('\0');
++#endif
++ obj->sum = yaffs_CalcNameSum(name);
++}
+
+- /* Verify sane equivalent object */
++void yaffs_SetObjectNameFromOH(yaffs_Object *obj, const yaffs_ObjectHeader *oh)
++{
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++ YCHAR tmpName[YAFFS_MAX_NAME_LENGTH+1];
++ memset(tmpName,0,sizeof(tmpName));
++ yaffs_LoadNameFromObjectHeader(obj->myDev,tmpName,oh->name,YAFFS_MAX_NAME_LENGTH+1);
++ yaffs_SetObjectName(obj,tmpName);
++#else
++ yaffs_SetObjectName(obj,oh->name);
++#endif
+ }
+
+-static void yaffs_VerifySymlink(yaffs_Object *obj)
++/*-------------------- TNODES -------------------
++
++ * List of spare tnodes
++ * The list is hooked together using the first pointer
++ * in the tnode.
++ */
++
++
++yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
+ {
+- if (obj && yaffs_SkipVerification(obj->myDev))
+- return;
++ yaffs_Tnode *tn = yaffs_AllocateRawTnode(dev);
++ if (tn){
++ memset(tn, 0, dev->tnodeSize);
++ dev->nTnodes++;
++ }
++
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+
+- /* Verify symlink string */
++ return tn;
+ }
+
+-static void yaffs_VerifySpecial(yaffs_Object *obj)
++/* FreeTnode frees up a tnode and puts it back on the free list */
++static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+ {
+- if (obj && yaffs_SkipVerification(obj->myDev))
+- return;
++ yaffs_FreeRawTnode(dev,tn);
++ dev->nTnodes--;
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+ }
+
+-static void yaffs_VerifyObject(yaffs_Object *obj)
++static void yaffs_DeinitialiseTnodesAndObjects(yaffs_Device *dev)
+ {
+- yaffs_Device *dev;
+-
+- __u32 chunkMin;
+- __u32 chunkMax;
+-
+- __u32 chunkIdOk;
+- __u32 chunkInRange;
+- __u32 chunkShouldNotBeDeleted;
+- __u32 chunkValid;
+-
+- if (!obj)
+- return;
++ yaffs_DeinitialiseRawTnodesAndObjects(dev);
++ dev->nObjects = 0;
++ dev->nTnodes = 0;
++}
+
+- if (obj->beingCreated)
+- return;
+
+- dev = obj->myDev;
++void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
++ unsigned val)
++{
++ __u32 *map = (__u32 *)tn;
++ __u32 bitInMap;
++ __u32 bitInWord;
++ __u32 wordInMap;
++ __u32 mask;
+
+- if (yaffs_SkipVerification(dev))
+- return;
++ pos &= YAFFS_TNODES_LEVEL0_MASK;
++ val >>= dev->chunkGroupBits;
+
+- /* Check sane object header chunk */
++ bitInMap = pos * dev->tnodeWidth;
++ wordInMap = bitInMap / 32;
++ bitInWord = bitInMap & (32 - 1);
+
+- chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
+- chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
++ mask = dev->tnodeMask << bitInWord;
+
+- chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
+- chunkIdOk = chunkInRange || obj->hdrChunk == 0;
+- chunkValid = chunkInRange &&
+- yaffs_CheckChunkBit(dev,
+- obj->hdrChunk / dev->nChunksPerBlock,
+- obj->hdrChunk % dev->nChunksPerBlock);
+- chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
++ map[wordInMap] &= ~mask;
++ map[wordInMap] |= (mask & (val << bitInWord));
+
+- if (!obj->fake &&
+- (!chunkIdOk || chunkShouldNotBeDeleted)) {
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
+- obj->objectId, obj->hdrChunk,
+- chunkIdOk ? "" : ",out of range",
+- chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
++ if (dev->tnodeWidth > (32 - bitInWord)) {
++ bitInWord = (32 - bitInWord);
++ wordInMap++;;
++ mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
++ map[wordInMap] &= ~mask;
++ map[wordInMap] |= (mask & (val >> bitInWord));
+ }
++}
+
+- if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
+- yaffs_ExtendedTags tags;
+- yaffs_ObjectHeader *oh;
+- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+-
+- oh = (yaffs_ObjectHeader *)buffer;
++__u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
++ unsigned pos)
++{
++ __u32 *map = (__u32 *)tn;
++ __u32 bitInMap;
++ __u32 bitInWord;
++ __u32 wordInMap;
++ __u32 val;
+
+- yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
+- &tags);
++ pos &= YAFFS_TNODES_LEVEL0_MASK;
+
+- yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
++ bitInMap = pos * dev->tnodeWidth;
++ wordInMap = bitInMap / 32;
++ bitInWord = bitInMap & (32 - 1);
+
+- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+- }
++ val = map[wordInMap] >> bitInWord;
+
+- /* Verify it has a parent */
+- if (obj && !obj->fake &&
+- (!obj->parent || obj->parent->myDev != dev)) {
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
+- obj->objectId, obj->parent));
++ if (dev->tnodeWidth > (32 - bitInWord)) {
++ bitInWord = (32 - bitInWord);
++ wordInMap++;;
++ val |= (map[wordInMap] << bitInWord);
+ }
+
+- /* Verify parent is a directory */
+- if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
+- obj->objectId, obj->parent->variantType));
+- }
++ val &= dev->tnodeMask;
++ val <<= dev->chunkGroupBits;
+
+- switch (obj->variantType) {
+- case YAFFS_OBJECT_TYPE_FILE:
+- yaffs_VerifyFile(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- yaffs_VerifySymlink(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- yaffs_VerifyDirectory(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- yaffs_VerifyHardLink(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- yaffs_VerifySpecial(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- default:
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Obj %d has illegaltype %d"TENDSTR),
+- obj->objectId, obj->variantType));
+- break;
+- }
++ return val;
+ }
+
+-static void yaffs_VerifyObjects(yaffs_Device *dev)
++/* ------------------- End of individual tnode manipulation -----------------*/
++
++/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
++ * The look up tree is represented by the top tnode and the number of topLevel
++ * in the tree. 0 means only the level 0 tnode is in the tree.
++ */
++
++/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
++yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId)
+ {
+- yaffs_Object *obj;
+- int i;
+- struct ylist_head *lh;
++ yaffs_Tnode *tn = fStruct->top;
++ __u32 i;
++ int requiredTallness;
++ int level = fStruct->topLevel;
+
+- if (yaffs_SkipVerification(dev))
+- return;
++ dev=dev;
+
+- /* Iterate through the objects in each hash entry */
++ /* Check sane level and chunk Id */
++ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
++ return NULL;
+
+- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+- ylist_for_each(lh, &dev->objectBucket[i].list) {
+- if (lh) {
+- obj = ylist_entry(lh, yaffs_Object, hashLink);
+- yaffs_VerifyObject(obj);
+- }
+- }
++ if (chunkId > YAFFS_MAX_CHUNK_ID)
++ return NULL;
++
++ /* First check we're tall enough (ie enough topLevel) */
++
++ i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (i) {
++ i >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
+ }
+-}
+
++ if (requiredTallness > fStruct->topLevel)
++ return NULL; /* Not tall enough, so we can't find it */
+
+-/*
+- * Simple hash function. Needs to have a reasonable spread
+- */
++ /* Traverse down to level 0 */
++ while (level > 0 && tn) {
++ tn = tn->internal[(chunkId >>
++ (YAFFS_TNODES_LEVEL0_BITS +
++ (level - 1) *
++ YAFFS_TNODES_INTERNAL_BITS)) &
++ YAFFS_TNODES_INTERNAL_MASK];
++ level--;
++ }
+
+-static Y_INLINE int yaffs_HashFunction(int n)
+-{
+- n = abs(n);
+- return n % YAFFS_NOBJECT_BUCKETS;
++ return tn;
+ }
+
+-/*
+- * Access functions to useful fake objects.
+- * Note that root might have a presence in NAND if permissions are set.
++/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
++ * This happens in two steps:
++ * 1. If the tree isn't tall enough, then make it taller.
++ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
++ *
++ * Used when modifying the tree.
++ *
++ * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
++ * be plugged into the ttree.
+ */
+
+-yaffs_Object *yaffs_Root(yaffs_Device *dev)
++yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId,
++ yaffs_Tnode *passedTn)
+ {
+- return dev->rootDir;
+-}
++ int requiredTallness;
++ int i;
++ int l;
++ yaffs_Tnode *tn;
+
+-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
+-{
+- return dev->lostNFoundDir;
+-}
++ __u32 x;
+
+
+-/*
+- * Erased NAND checking functions
+- */
++ /* Check sane level and page Id */
++ if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
++ return NULL;
+
+-int yaffs_CheckFF(__u8 *buffer, int nBytes)
+-{
+- /* Horrible, slow implementation */
+- while (nBytes--) {
+- if (*buffer != 0xFF)
+- return 0;
+- buffer++;
+- }
+- return 1;
+-}
+-
+-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
+- int chunkInNAND)
+-{
+- int retval = YAFFS_OK;
+- __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
+- yaffs_ExtendedTags tags;
+- int result;
+-
+- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
+-
+- if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
+- retval = YAFFS_FAIL;
+-
+- if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
+- T(YAFFS_TRACE_NANDACCESS,
+- (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
+- retval = YAFFS_FAIL;
+- }
+-
+- yaffs_ReleaseTempBuffer(dev, data, __LINE__);
+-
+- return retval;
+-
+-}
+-
+-static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
+- const __u8 *data,
+- yaffs_ExtendedTags *tags,
+- int useReserve)
+-{
+- int attempts = 0;
+- int writeOk = 0;
+- int chunk;
+-
+- yaffs_InvalidateCheckpoint(dev);
+-
+- do {
+- yaffs_BlockInfo *bi = 0;
+- int erasedOk = 0;
+-
+- chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
+- if (chunk < 0) {
+- /* no space */
+- break;
+- }
+-
+- /* First check this chunk is erased, if it needs
+- * checking. The checking policy (unless forced
+- * always on) is as follows:
+- *
+- * Check the first page we try to write in a block.
+- * If the check passes then we don't need to check any
+- * more. If the check fails, we check again...
+- * If the block has been erased, we don't need to check.
+- *
+- * However, if the block has been prioritised for gc,
+- * then we think there might be something odd about
+- * this block and stop using it.
+- *
+- * Rationale: We should only ever see chunks that have
+- * not been erased if there was a partially written
+- * chunk due to power loss. This checking policy should
+- * catch that case with very few checks and thus save a
+- * lot of checks that are most likely not needed.
+- */
+- if (bi->gcPrioritise) {
+- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
+- /* try another chunk */
+- continue;
+- }
+-
+- /* let's give it a try */
+- attempts++;
+-
+-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
+- bi->skipErasedCheck = 0;
+-#endif
+- if (!bi->skipErasedCheck) {
+- erasedOk = yaffs_CheckChunkErased(dev, chunk);
+- if (erasedOk != YAFFS_OK) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("**>> yaffs chunk %d was not erased"
+- TENDSTR), chunk));
+-
+- /* try another chunk */
+- continue;
+- }
+- bi->skipErasedCheck = 1;
+- }
+-
+- writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
+- data, tags);
+- if (writeOk != YAFFS_OK) {
+- yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
+- /* try another chunk */
+- continue;
+- }
+-
+- /* Copy the data into the robustification buffer */
+- yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
+-
+- } while (writeOk != YAFFS_OK &&
+- (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
+-
+- if (!writeOk)
+- chunk = -1;
+-
+- if (attempts > 1) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("**>> yaffs write required %d attempts" TENDSTR),
+- attempts));
+-
+- dev->nRetriedWrites += (attempts - 1);
+- }
+-
+- return chunk;
+-}
+-
+-/*
+- * Block retiring for handling a broken block.
+- */
+-
+-static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
+-{
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+-
+- yaffs_InvalidateCheckpoint(dev);
+-
+- if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
+- if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR(
+- "yaffs: Failed to mark bad and erase block %d"
+- TENDSTR), blockInNAND));
+- } else {
+- yaffs_ExtendedTags tags;
+- int chunkId = blockInNAND * dev->nChunksPerBlock;
+-
+- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+-
+- memset(buffer, 0xff, dev->nDataBytesPerChunk);
+- yaffs_InitialiseTags(&tags);
+- tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
+- if (dev->writeChunkWithTagsToNAND(dev, chunkId -
+- dev->chunkOffset, buffer, &tags) != YAFFS_OK)
+- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
+- TCONT("write bad block marker to block %d")
+- TENDSTR), blockInNAND));
+-
+- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+- }
+- }
+-
+- bi->blockState = YAFFS_BLOCK_STATE_DEAD;
+- bi->gcPrioritise = 0;
+- bi->needsRetiring = 0;
+-
+- dev->nRetiredBlocks++;
+-}
+-
+-/*
+- * Functions for robustisizing TODO
+- *
+- */
+-
+-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
+- const __u8 *data,
+- const yaffs_ExtendedTags *tags)
+-{
+-}
+-
+-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+- const yaffs_ExtendedTags *tags)
+-{
+-}
+-
+-void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
+-{
+- if (!bi->gcPrioritise) {
+- bi->gcPrioritise = 1;
+- dev->hasPendingPrioritisedGCs = 1;
+- bi->chunkErrorStrikes++;
+-
+- if (bi->chunkErrorStrikes > 3) {
+- bi->needsRetiring = 1; /* Too many stikes, so retire this */
+- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
+-
+- }
+- }
+-}
+-
+-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
+- int erasedOk)
+-{
+- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
+-
+- yaffs_HandleChunkError(dev, bi);
+-
+- if (erasedOk) {
+- /* Was an actual write failure, so mark the block for retirement */
+- bi->needsRetiring = 1;
+- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+- (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
+- }
+-
+- /* Delete the chunk */
+- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+-}
+-
+-
+-/*---------------- Name handling functions ------------*/
+-
+-static __u16 yaffs_CalcNameSum(const YCHAR *name)
+-{
+- __u16 sum = 0;
+- __u16 i = 1;
+-
+- const YUCHAR *bname = (const YUCHAR *) name;
+- if (bname) {
+- while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
+-
+-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+- sum += yaffs_toupper(*bname) * i;
+-#else
+- sum += (*bname) * i;
+-#endif
+- i++;
+- bname++;
+- }
+- }
+- return sum;
+-}
+-
+-static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
+-{
+-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+- memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
+- if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
+- yaffs_strcpy(obj->shortName, name);
+- else
+- obj->shortName[0] = _Y('\0');
+-#endif
+- obj->sum = yaffs_CalcNameSum(name);
+-}
+-
+-/*-------------------- TNODES -------------------
+-
+- * List of spare tnodes
+- * The list is hooked together using the first pointer
+- * in the tnode.
+- */
+-
+-/* yaffs_CreateTnodes creates a bunch more tnodes and
+- * adds them to the tnode free list.
+- * Don't use this function directly
+- */
+-
+-static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
+-{
+- int i;
+- int tnodeSize;
+- yaffs_Tnode *newTnodes;
+- __u8 *mem;
+- yaffs_Tnode *curr;
+- yaffs_Tnode *next;
+- yaffs_TnodeList *tnl;
+-
+- if (nTnodes < 1)
+- return YAFFS_OK;
+-
+- /* Calculate the tnode size in bytes for variable width tnode support.
+- * Must be a multiple of 32-bits */
+- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+-
+- if (tnodeSize < sizeof(yaffs_Tnode))
+- tnodeSize = sizeof(yaffs_Tnode);
+-
+- /* make these things */
+-
+- newTnodes = YMALLOC(nTnodes * tnodeSize);
+- mem = (__u8 *)newTnodes;
+-
+- if (!newTnodes) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+- return YAFFS_FAIL;
+- }
+-
+- /* Hook them into the free list */
+-#if 0
+- for (i = 0; i < nTnodes - 1; i++) {
+- newTnodes[i].internal[0] = &newTnodes[i + 1];
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+- }
+-
+- newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+- dev->freeTnodes = newTnodes;
+-#else
+- /* New hookup for wide tnodes */
+- for (i = 0; i < nTnodes - 1; i++) {
+- curr = (yaffs_Tnode *) &mem[i * tnodeSize];
+- next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
+- curr->internal[0] = next;
+- }
+-
+- curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
+- curr->internal[0] = dev->freeTnodes;
+- dev->freeTnodes = (yaffs_Tnode *)mem;
+-
+-#endif
+-
+-
+- dev->nFreeTnodes += nTnodes;
+- dev->nTnodesCreated += nTnodes;
+-
+- /* Now add this bunch of tnodes to a list for freeing up.
+- * NB If we can't add this to the management list it isn't fatal
+- * but it just means we can't free this bunch of tnodes later.
+- */
+-
+- tnl = YMALLOC(sizeof(yaffs_TnodeList));
+- if (!tnl) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs: Could not add tnodes to management list" TENDSTR)));
+- return YAFFS_FAIL;
+- } else {
+- tnl->tnodes = newTnodes;
+- tnl->next = dev->allocatedTnodeList;
+- dev->allocatedTnodeList = tnl;
+- }
+-
+- T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
+-
+- return YAFFS_OK;
+-}
+-
+-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
+-
+-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
+-{
+- yaffs_Tnode *tn = NULL;
+-
+- /* If there are none left make more */
+- if (!dev->freeTnodes)
+- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
+-
+- if (dev->freeTnodes) {
+- tn = dev->freeTnodes;
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
+- /* Hoosterman, this thing looks like it isn't in the list */
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
+- }
+-#endif
+- dev->freeTnodes = dev->freeTnodes->internal[0];
+- dev->nFreeTnodes--;
+- }
+-
+- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-
+- return tn;
+-}
+-
+-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
+-{
+- yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
+- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+-
+- if (tnodeSize < sizeof(yaffs_Tnode))
+- tnodeSize = sizeof(yaffs_Tnode);
+-
+- if (tn)
+- memset(tn, 0, tnodeSize);
+-
+- return tn;
+-}
+-
+-/* FreeTnode frees up a tnode and puts it back on the free list */
+-static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+-{
+- if (tn) {
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
+- /* Hoosterman, this thing looks like it is already in the list */
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
+- }
+- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+-#endif
+- tn->internal[0] = dev->freeTnodes;
+- dev->freeTnodes = tn;
+- dev->nFreeTnodes++;
+- }
+- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-}
+-
+-static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
+-{
+- /* Free the list of allocated tnodes */
+- yaffs_TnodeList *tmp;
+-
+- while (dev->allocatedTnodeList) {
+- tmp = dev->allocatedTnodeList->next;
+-
+- YFREE(dev->allocatedTnodeList->tnodes);
+- YFREE(dev->allocatedTnodeList);
+- dev->allocatedTnodeList = tmp;
+-
+- }
+-
+- dev->freeTnodes = NULL;
+- dev->nFreeTnodes = 0;
+-}
+-
+-static void yaffs_InitialiseTnodes(yaffs_Device *dev)
+-{
+- dev->allocatedTnodeList = NULL;
+- dev->freeTnodes = NULL;
+- dev->nFreeTnodes = 0;
+- dev->nTnodesCreated = 0;
+-}
+-
+-
+-void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
+- unsigned val)
+-{
+- __u32 *map = (__u32 *)tn;
+- __u32 bitInMap;
+- __u32 bitInWord;
+- __u32 wordInMap;
+- __u32 mask;
+-
+- pos &= YAFFS_TNODES_LEVEL0_MASK;
+- val >>= dev->chunkGroupBits;
+-
+- bitInMap = pos * dev->tnodeWidth;
+- wordInMap = bitInMap / 32;
+- bitInWord = bitInMap & (32 - 1);
+-
+- mask = dev->tnodeMask << bitInWord;
+-
+- map[wordInMap] &= ~mask;
+- map[wordInMap] |= (mask & (val << bitInWord));
+-
+- if (dev->tnodeWidth > (32 - bitInWord)) {
+- bitInWord = (32 - bitInWord);
+- wordInMap++;;
+- mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
+- map[wordInMap] &= ~mask;
+- map[wordInMap] |= (mask & (val >> bitInWord));
+- }
+-}
+-
+-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
+- unsigned pos)
+-{
+- __u32 *map = (__u32 *)tn;
+- __u32 bitInMap;
+- __u32 bitInWord;
+- __u32 wordInMap;
+- __u32 val;
+-
+- pos &= YAFFS_TNODES_LEVEL0_MASK;
+-
+- bitInMap = pos * dev->tnodeWidth;
+- wordInMap = bitInMap / 32;
+- bitInWord = bitInMap & (32 - 1);
+-
+- val = map[wordInMap] >> bitInWord;
+-
+- if (dev->tnodeWidth > (32 - bitInWord)) {
+- bitInWord = (32 - bitInWord);
+- wordInMap++;;
+- val |= (map[wordInMap] << bitInWord);
+- }
+-
+- val &= dev->tnodeMask;
+- val <<= dev->chunkGroupBits;
+-
+- return val;
+-}
+-
+-/* ------------------- End of individual tnode manipulation -----------------*/
+-
+-/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
+- * The look up tree is represented by the top tnode and the number of topLevel
+- * in the tree. 0 means only the level 0 tnode is in the tree.
+- */
+-
+-/* FindLevel0Tnode finds the level 0 tnode, if one exists. */
+-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
+- yaffs_FileStructure *fStruct,
+- __u32 chunkId)
+-{
+- yaffs_Tnode *tn = fStruct->top;
+- __u32 i;
+- int requiredTallness;
+- int level = fStruct->topLevel;
+-
+- /* Check sane level and chunk Id */
+- if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
+- return NULL;
+-
+- if (chunkId > YAFFS_MAX_CHUNK_ID)
+- return NULL;
+-
+- /* First check we're tall enough (ie enough topLevel) */
+-
+- i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+- requiredTallness = 0;
+- while (i) {
+- i >>= YAFFS_TNODES_INTERNAL_BITS;
+- requiredTallness++;
+- }
+-
+- if (requiredTallness > fStruct->topLevel)
+- return NULL; /* Not tall enough, so we can't find it */
+-
+- /* Traverse down to level 0 */
+- while (level > 0 && tn) {
+- tn = tn->internal[(chunkId >>
+- (YAFFS_TNODES_LEVEL0_BITS +
+- (level - 1) *
+- YAFFS_TNODES_INTERNAL_BITS)) &
+- YAFFS_TNODES_INTERNAL_MASK];
+- level--;
+- }
+-
+- return tn;
+-}
+-
+-/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
+- * This happens in two steps:
+- * 1. If the tree isn't tall enough, then make it taller.
+- * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
+- *
+- * Used when modifying the tree.
+- *
+- * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
+- * be plugged into the ttree.
+- */
+-
+-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
+- yaffs_FileStructure *fStruct,
+- __u32 chunkId,
+- yaffs_Tnode *passedTn)
+-{
+- int requiredTallness;
+- int i;
+- int l;
+- yaffs_Tnode *tn;
+-
+- __u32 x;
+-
+-
+- /* Check sane level and page Id */
+- if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
+- return NULL;
+-
+- if (chunkId > YAFFS_MAX_CHUNK_ID)
+- return NULL;
+-
+- /* First check we're tall enough (ie enough topLevel) */
+-
+- x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
+- requiredTallness = 0;
+- while (x) {
+- x >>= YAFFS_TNODES_INTERNAL_BITS;
+- requiredTallness++;
+- }
+-
+-
+- if (requiredTallness > fStruct->topLevel) {
+- /* Not tall enough, gotta make the tree taller */
+- for (i = fStruct->topLevel; i < requiredTallness; i++) {
+-
+- tn = yaffs_GetTnode(dev);
+-
+- if (tn) {
+- tn->internal[0] = fStruct->top;
+- fStruct->top = tn;
+- } else {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("yaffs: no more tnodes" TENDSTR)));
+- }
+- }
+-
+- fStruct->topLevel = requiredTallness;
+- }
+-
+- /* Traverse down to level 0, adding anything we need */
+-
+- l = fStruct->topLevel;
+- tn = fStruct->top;
+-
+- if (l > 0) {
+- while (l > 0 && tn) {
+- x = (chunkId >>
+- (YAFFS_TNODES_LEVEL0_BITS +
+- (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
+- YAFFS_TNODES_INTERNAL_MASK;
+-
+-
+- if ((l > 1) && !tn->internal[x]) {
+- /* Add missing non-level-zero tnode */
+- tn->internal[x] = yaffs_GetTnode(dev);
+-
+- } else if (l == 1) {
+- /* Looking from level 1 at level 0 */
+- if (passedTn) {
+- /* If we already have one, then release it.*/
+- if (tn->internal[x])
+- yaffs_FreeTnode(dev, tn->internal[x]);
+- tn->internal[x] = passedTn;
+-
+- } else if (!tn->internal[x]) {
+- /* Don't have one, none passed in */
+- tn->internal[x] = yaffs_GetTnode(dev);
+- }
+- }
+-
+- tn = tn->internal[x];
+- l--;
+- }
+- } else {
+- /* top is level 0 */
+- if (passedTn) {
+- memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
+- yaffs_FreeTnode(dev, passedTn);
+- }
+- }
+-
+- return tn;
+-}
+-
+-static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
+- yaffs_ExtendedTags *tags, int objectId,
+- int chunkInInode)
+-{
+- int j;
+-
+- for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
+- if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
+- theChunk % dev->nChunksPerBlock)) {
+- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
+- tags);
+- if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
+- /* found it; */
+- return theChunk;
+- }
+- }
+- theChunk++;
+- }
+- return -1;
+-}
+-
+-
+-/* DeleteWorker scans backwards through the tnode tree and deletes all the
+- * chunks and tnodes in the file
+- * Returns 1 if the tree was deleted.
+- * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
+- */
+-
+-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
+- int chunkOffset, int *limit)
+-{
+- int i;
+- int chunkInInode;
+- int theChunk;
+- yaffs_ExtendedTags tags;
+- int foundChunk;
+- yaffs_Device *dev = in->myDev;
+-
+- int allDone = 1;
+-
+- if (tn) {
+- if (level > 0) {
+- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+- i--) {
+- if (tn->internal[i]) {
+- if (limit && (*limit) < 0) {
+- allDone = 0;
+- } else {
+- allDone =
+- yaffs_DeleteWorker(in,
+- tn->
+- internal
+- [i],
+- level -
+- 1,
+- (chunkOffset
+- <<
+- YAFFS_TNODES_INTERNAL_BITS)
+- + i,
+- limit);
+- }
+- if (allDone) {
+- yaffs_FreeTnode(dev,
+- tn->
+- internal[i]);
+- tn->internal[i] = NULL;
+- }
+- }
+- }
+- return (allDone) ? 1 : 0;
+- } else if (level == 0) {
+- int hitLimit = 0;
+-
+- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
+- i--) {
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+- if (theChunk) {
+-
+- chunkInInode = (chunkOffset <<
+- YAFFS_TNODES_LEVEL0_BITS) + i;
+-
+- foundChunk =
+- yaffs_FindChunkInGroup(dev,
+- theChunk,
+- &tags,
+- in->objectId,
+- chunkInInode);
+-
+- if (foundChunk > 0) {
+- yaffs_DeleteChunk(dev,
+- foundChunk, 1,
+- __LINE__);
+- in->nDataChunks--;
+- if (limit) {
+- *limit = *limit - 1;
+- if (*limit <= 0)
+- hitLimit = 1;
+- }
+-
+- }
+-
+- yaffs_PutLevel0Tnode(dev, tn, i, 0);
+- }
+-
+- }
+- return (i < 0) ? 1 : 0;
+-
+- }
+-
+- }
+-
+- return 1;
+-
+-}
+-
+-static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
+-{
+- yaffs_BlockInfo *theBlock;
+-
+- T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+-
+- theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
+- if (theBlock) {
+- theBlock->softDeletions++;
+- dev->nFreeChunks++;
+- }
+-}
+-
+-/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
+- * All soft deleting does is increment the block's softdelete count and pulls the chunk out
+- * of the tnode.
+- * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
+- */
+-
+-static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
+- __u32 level, int chunkOffset)
+-{
+- int i;
+- int theChunk;
+- int allDone = 1;
+- yaffs_Device *dev = in->myDev;
+-
+- if (tn) {
+- if (level > 0) {
+-
+- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
+- i--) {
+- if (tn->internal[i]) {
+- allDone =
+- yaffs_SoftDeleteWorker(in,
+- tn->
+- internal[i],
+- level - 1,
+- (chunkOffset
+- <<
+- YAFFS_TNODES_INTERNAL_BITS)
+- + i);
+- if (allDone) {
+- yaffs_FreeTnode(dev,
+- tn->
+- internal[i]);
+- tn->internal[i] = NULL;
+- } else {
+- /* Hoosterman... how could this happen? */
+- }
+- }
+- }
+- return (allDone) ? 1 : 0;
+- } else if (level == 0) {
+-
+- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
+- if (theChunk) {
+- /* Note this does not find the real chunk, only the chunk group.
+- * We make an assumption that a chunk group is not larger than
+- * a block.
+- */
+- yaffs_SoftDeleteChunk(dev, theChunk);
+- yaffs_PutLevel0Tnode(dev, tn, i, 0);
+- }
+-
+- }
+- return 1;
+-
+- }
+-
+- }
+-
+- return 1;
+-
+-}
+-
+-static void yaffs_SoftDeleteFile(yaffs_Object *obj)
+-{
+- if (obj->deleted &&
+- obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
+- if (obj->nDataChunks <= 0) {
+- /* Empty file with no duplicate object headers, just delete it immediately */
+- yaffs_FreeTnode(obj->myDev,
+- obj->variant.fileVariant.top);
+- obj->variant.fileVariant.top = NULL;
+- T(YAFFS_TRACE_TRACING,
+- (TSTR("yaffs: Deleting empty file %d" TENDSTR),
+- obj->objectId));
+- yaffs_DoGenericObjectDeletion(obj);
+- } else {
+- yaffs_SoftDeleteWorker(obj,
+- obj->variant.fileVariant.top,
+- obj->variant.fileVariant.
+- topLevel, 0);
+- obj->softDeleted = 1;
+- }
+- }
+-}
+-
+-/* Pruning removes any part of the file structure tree that is beyond the
+- * bounds of the file (ie that does not point to chunks).
+- *
+- * A file should only get pruned when its size is reduced.
+- *
+- * Before pruning, the chunks must be pulled from the tree and the
+- * level 0 tnode entries must be zeroed out.
+- * Could also use this for file deletion, but that's probably better handled
+- * by a special case.
+- */
+-
+-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
+- __u32 level, int del0)
+-{
+- int i;
+- int hasData;
+-
+- if (tn) {
+- hasData = 0;
+-
+- for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
+- if (tn->internal[i] && level > 0) {
+- tn->internal[i] =
+- yaffs_PruneWorker(dev, tn->internal[i],
+- level - 1,
+- (i == 0) ? del0 : 1);
+- }
+-
+- if (tn->internal[i])
+- hasData++;
+- }
+-
+- if (hasData == 0 && del0) {
+- /* Free and return NULL */
+-
+- yaffs_FreeTnode(dev, tn);
+- tn = NULL;
+- }
+-
+- }
+-
+- return tn;
+-
+-}
+-
+-static int yaffs_PruneFileStructure(yaffs_Device *dev,
+- yaffs_FileStructure *fStruct)
+-{
+- int i;
+- int hasData;
+- int done = 0;
+- yaffs_Tnode *tn;
+-
+- if (fStruct->topLevel > 0) {
+- fStruct->top =
+- yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
+-
+- /* Now we have a tree with all the non-zero branches NULL but the height
+- * is the same as it was.
+- * Let's see if we can trim internal tnodes to shorten the tree.
+- * We can do this if only the 0th element in the tnode is in use
+- * (ie all the non-zero are NULL)
+- */
+-
+- while (fStruct->topLevel && !done) {
+- tn = fStruct->top;
+-
+- hasData = 0;
+- for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
+- if (tn->internal[i])
+- hasData++;
+- }
+-
+- if (!hasData) {
+- fStruct->top = tn->internal[0];
+- fStruct->topLevel--;
+- yaffs_FreeTnode(dev, tn);
+- } else {
+- done = 1;
+- }
+- }
+- }
+-
+- return YAFFS_OK;
+-}
+-
+-/*-------------------- End of File Structure functions.-------------------*/
+-
+-/* yaffs_CreateFreeObjects creates a bunch more objects and
+- * adds them to the object free list.
+- */
+-static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
+-{
+- int i;
+- yaffs_Object *newObjects;
+- yaffs_ObjectList *list;
+-
+- if (nObjects < 1)
+- return YAFFS_OK;
+-
+- /* make these things */
+- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
+- list = YMALLOC(sizeof(yaffs_ObjectList));
+-
+- if (!newObjects || !list) {
+- if (newObjects)
+- YFREE(newObjects);
+- if (list)
+- YFREE(list);
+- T(YAFFS_TRACE_ALLOCATE,
+- (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
+- return YAFFS_FAIL;
+- }
+-
+- /* Hook them into the free list */
+- for (i = 0; i < nObjects - 1; i++) {
+- newObjects[i].siblings.next =
+- (struct ylist_head *)(&newObjects[i + 1]);
+- }
+-
+- newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
+- dev->freeObjects = newObjects;
+- dev->nFreeObjects += nObjects;
+- dev->nObjectsCreated += nObjects;
+-
+- /* Now add this bunch of Objects to a list for freeing up. */
+-
+- list->objects = newObjects;
+- list->next = dev->allocatedObjectList;
+- dev->allocatedObjectList = list;
+-
+- return YAFFS_OK;
+-}
+-
+-
+-/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
+-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
+-{
+- yaffs_Object *tn = NULL;
+-
+-#ifdef VALGRIND_TEST
+- tn = YMALLOC(sizeof(yaffs_Object));
+-#else
+- /* If there are none left make more */
+- if (!dev->freeObjects)
+- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
+-
+- if (dev->freeObjects) {
+- tn = dev->freeObjects;
+- dev->freeObjects =
+- (yaffs_Object *) (dev->freeObjects->siblings.next);
+- dev->nFreeObjects--;
+- }
+-#endif
+- if (tn) {
+- /* Now sweeten it up... */
+-
+- memset(tn, 0, sizeof(yaffs_Object));
+- tn->beingCreated = 1;
+-
+- tn->myDev = dev;
+- tn->hdrChunk = 0;
+- tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
+- YINIT_LIST_HEAD(&(tn->hardLinks));
+- YINIT_LIST_HEAD(&(tn->hashLink));
+- YINIT_LIST_HEAD(&tn->siblings);
+-
+-
+- /* Now make the directory sane */
+- if (dev->rootDir) {
+- tn->parent = dev->rootDir;
+- ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
+- }
+-
+- /* Add it to the lost and found directory.
+- * NB Can't put root or lostNFound in lostNFound so
+- * check if lostNFound exists first
+- */
+- if (dev->lostNFoundDir)
+- yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
+-
+- tn->beingCreated = 0;
+- }
+-
+- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-
+- return tn;
+-}
+-
+-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
+- __u32 mode)
+-{
+-
+- yaffs_Object *obj =
+- yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
+- if (obj) {
+- obj->fake = 1; /* it is fake so it might have no NAND presence... */
+- obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
+- obj->unlinkAllowed = 0; /* ... or unlink it */
+- obj->deleted = 0;
+- obj->unlinked = 0;
+- obj->yst_mode = mode;
+- obj->myDev = dev;
+- obj->hdrChunk = 0; /* Not a valid chunk. */
+- }
+-
+- return obj;
+-
+-}
+-
+-static void yaffs_UnhashObject(yaffs_Object *tn)
+-{
+- int bucket;
+- yaffs_Device *dev = tn->myDev;
+-
+- /* If it is still linked into the bucket list, free from the list */
+- if (!ylist_empty(&tn->hashLink)) {
+- ylist_del_init(&tn->hashLink);
+- bucket = yaffs_HashFunction(tn->objectId);
+- dev->objectBucket[bucket].count--;
+- }
+-}
+-
+-/* FreeObject frees up a Object and puts it back on the free list */
+-static void yaffs_FreeObject(yaffs_Object *tn)
+-{
+- yaffs_Device *dev = tn->myDev;
+-
+-#ifdef __KERNEL__
+- T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
+-#endif
+-
+- if (tn->parent)
+- YBUG();
+- if (!ylist_empty(&tn->siblings))
+- YBUG();
+-
+-
+-#ifdef __KERNEL__
+- if (tn->myInode) {
+- /* We're still hooked up to a cached inode.
+- * Don't delete now, but mark for later deletion
+- */
+- tn->deferedFree = 1;
+- return;
+- }
+-#endif
+-
+- yaffs_UnhashObject(tn);
+-
+-#ifdef VALGRIND_TEST
+- YFREE(tn);
+-#else
+- /* Link into the free list. */
+- tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
+- dev->freeObjects = tn;
+- dev->nFreeObjects++;
+-#endif
+- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+-}
+-
+-#ifdef __KERNEL__
+-
+-void yaffs_HandleDeferedFree(yaffs_Object *obj)
+-{
+- if (obj->deferedFree)
+- yaffs_FreeObject(obj);
+-}
+-
+-#endif
+-
+-static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
+-{
+- /* Free the list of allocated Objects */
+-
+- yaffs_ObjectList *tmp;
+-
+- while (dev->allocatedObjectList) {
+- tmp = dev->allocatedObjectList->next;
+- YFREE(dev->allocatedObjectList->objects);
+- YFREE(dev->allocatedObjectList);
+-
+- dev->allocatedObjectList = tmp;
+- }
+-
+- dev->freeObjects = NULL;
+- dev->nFreeObjects = 0;
+-}
+-
+-static void yaffs_InitialiseObjects(yaffs_Device *dev)
+-{
+- int i;
+-
+- dev->allocatedObjectList = NULL;
+- dev->freeObjects = NULL;
+- dev->nFreeObjects = 0;
+-
+- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
+- YINIT_LIST_HEAD(&dev->objectBucket[i].list);
+- dev->objectBucket[i].count = 0;
+- }
+-}
+-
+-static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
+-{
+- static int x;
+- int i;
+- int l = 999;
+- int lowest = 999999;
+-
+- /* First let's see if we can find one that's empty. */
+-
+- for (i = 0; i < 10 && lowest > 0; i++) {
+- x++;
+- x %= YAFFS_NOBJECT_BUCKETS;
+- if (dev->objectBucket[x].count < lowest) {
+- lowest = dev->objectBucket[x].count;
+- l = x;
+- }
+-
+- }
+-
+- /* If we didn't find an empty list, then try
+- * looking a bit further for a short one
+- */
+-
+- for (i = 0; i < 10 && lowest > 3; i++) {
+- x++;
+- x %= YAFFS_NOBJECT_BUCKETS;
+- if (dev->objectBucket[x].count < lowest) {
+- lowest = dev->objectBucket[x].count;
+- l = x;
+- }
+-
+- }
+-
+- return l;
+-}
+-
+-static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
+-{
+- int bucket = yaffs_FindNiceObjectBucket(dev);
+-
+- /* Now find an object value that has not already been taken
+- * by scanning the list.
+- */
+-
+- int found = 0;
+- struct ylist_head *i;
+-
+- __u32 n = (__u32) bucket;
+-
+- /* yaffs_CheckObjectHashSanity(); */
+-
+- while (!found) {
+- found = 1;
+- n += YAFFS_NOBJECT_BUCKETS;
+- if (1 || dev->objectBucket[bucket].count > 0) {
+- ylist_for_each(i, &dev->objectBucket[bucket].list) {
+- /* If there is already one in the list */
+- if (i && ylist_entry(i, yaffs_Object,
+- hashLink)->objectId == n) {
+- found = 0;
+- }
+- }
+- }
+- }
+-
+- return n;
+-}
+-
+-static void yaffs_HashObject(yaffs_Object *in)
+-{
+- int bucket = yaffs_HashFunction(in->objectId);
+- yaffs_Device *dev = in->myDev;
+-
+- ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
+- dev->objectBucket[bucket].count++;
+-}
+-
+-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
+-{
+- int bucket = yaffs_HashFunction(number);
+- struct ylist_head *i;
+- yaffs_Object *in;
+-
+- ylist_for_each(i, &dev->objectBucket[bucket].list) {
+- /* Look if it is in the list */
+- if (i) {
+- in = ylist_entry(i, yaffs_Object, hashLink);
+- if (in->objectId == number) {
+-#ifdef __KERNEL__
+- /* Don't tell the VFS about this one if it is defered free */
+- if (in->deferedFree)
+- return NULL;
+-#endif
+-
+- return in;
+- }
+- }
+- }
+-
+- return NULL;
+-}
+-
+-yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
+- yaffs_ObjectType type)
+-{
+- yaffs_Object *theObject;
+- yaffs_Tnode *tn = NULL;
+-
+- if (number < 0)
+- number = yaffs_CreateNewObjectNumber(dev);
+-
+- theObject = yaffs_AllocateEmptyObject(dev);
+- if (!theObject)
+- return NULL;
+-
+- if (type == YAFFS_OBJECT_TYPE_FILE) {
+- tn = yaffs_GetTnode(dev);
+- if (!tn) {
+- yaffs_FreeObject(theObject);
+- return NULL;
+- }
+- }
+-
+- if (theObject) {
+- theObject->fake = 0;
+- theObject->renameAllowed = 1;
+- theObject->unlinkAllowed = 1;
+- theObject->objectId = number;
+- yaffs_HashObject(theObject);
+- theObject->variantType = type;
+-#ifdef CONFIG_YAFFS_WINCE
+- yfsd_WinFileTimeNow(theObject->win_atime);
+- theObject->win_ctime[0] = theObject->win_mtime[0] =
+- theObject->win_atime[0];
+- theObject->win_ctime[1] = theObject->win_mtime[1] =
+- theObject->win_atime[1];
+-
+-#else
+-
+- theObject->yst_atime = theObject->yst_mtime =
+- theObject->yst_ctime = Y_CURRENT_TIME;
+-#endif
+- switch (type) {
+- case YAFFS_OBJECT_TYPE_FILE:
+- theObject->variant.fileVariant.fileSize = 0;
+- theObject->variant.fileVariant.scannedFileSize = 0;
+- theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
+- theObject->variant.fileVariant.topLevel = 0;
+- theObject->variant.fileVariant.top = tn;
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
+- children);
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- /* No action required */
+- break;
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- /* todo this should not happen */
+- break;
+- }
+- }
+-
+- return theObject;
+-}
+-
+-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
+- int number,
+- yaffs_ObjectType type)
+-{
+- yaffs_Object *theObject = NULL;
+-
+- if (number > 0)
+- theObject = yaffs_FindObjectByNumber(dev, number);
+-
+- if (!theObject)
+- theObject = yaffs_CreateNewObject(dev, number, type);
+-
+- return theObject;
+-
+-}
+-
+-
+-static YCHAR *yaffs_CloneString(const YCHAR *str)
+-{
+- YCHAR *newStr = NULL;
+-
+- if (str && *str) {
+- newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
+- if (newStr)
+- yaffs_strcpy(newStr, str);
+- }
+-
+- return newStr;
+-
+-}
+-
+-/*
+- * Mknod (create) a new object.
+- * equivalentObject only has meaning for a hard link;
+- * aliasString only has meaning for a sumlink.
+- * rdev only has meaning for devices (a subset of special objects)
+- */
+-
+-static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
+- yaffs_Object *parent,
+- const YCHAR *name,
+- __u32 mode,
+- __u32 uid,
+- __u32 gid,
+- yaffs_Object *equivalentObject,
+- const YCHAR *aliasString, __u32 rdev)
+-{
+- yaffs_Object *in;
+- YCHAR *str = NULL;
+-
+- yaffs_Device *dev = parent->myDev;
+-
+- /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
+- if (yaffs_FindObjectByName(parent, name))
+- return NULL;
+-
+- in = yaffs_CreateNewObject(dev, -1, type);
+-
+- if (!in)
+- return YAFFS_FAIL;
+-
+- if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
+- str = yaffs_CloneString(aliasString);
+- if (!str) {
+- yaffs_FreeObject(in);
+- return NULL;
+- }
+- }
+-
+-
+-
+- if (in) {
+- in->hdrChunk = 0;
+- in->valid = 1;
+- in->variantType = type;
+-
+- in->yst_mode = mode;
+-
+-#ifdef CONFIG_YAFFS_WINCE
+- yfsd_WinFileTimeNow(in->win_atime);
+- in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
+- in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
+-
+-#else
+- in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
+-
+- in->yst_rdev = rdev;
+- in->yst_uid = uid;
+- in->yst_gid = gid;
+-#endif
+- in->nDataChunks = 0;
+-
+- yaffs_SetObjectName(in, name);
+- in->dirty = 1;
+-
+- yaffs_AddObjectToDirectory(parent, in);
+-
+- in->myDev = parent->myDev;
+-
+- switch (type) {
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- in->variant.symLinkVariant.alias = str;
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- in->variant.hardLinkVariant.equivalentObject =
+- equivalentObject;
+- in->variant.hardLinkVariant.equivalentObjectId =
+- equivalentObject->objectId;
+- ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
+- break;
+- case YAFFS_OBJECT_TYPE_FILE:
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- /* do nothing */
+- break;
+- }
+-
+- if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
+- /* Could not create the object header, fail the creation */
+- yaffs_DeleteObject(in);
+- in = NULL;
+- }
+-
+- }
+-
+- return in;
+-}
+-
+-yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+- __u32 mode, __u32 uid, __u32 gid)
+-{
+- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
+- uid, gid, NULL, NULL, 0);
+-}
+-
+-yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
+- __u32 mode, __u32 uid, __u32 gid)
+-{
+- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
+- mode, uid, gid, NULL, NULL, 0);
+-}
+-
+-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
+- __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
+-{
+- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
+- uid, gid, NULL, NULL, rdev);
+-}
+-
+-yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
+- __u32 mode, __u32 uid, __u32 gid,
+- const YCHAR *alias)
+-{
+- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
+- uid, gid, NULL, alias, 0);
+-}
+-
+-/* yaffs_Link returns the object id of the equivalent object.*/
+-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
+- yaffs_Object *equivalentObject)
+-{
+- /* Get the real object in case we were fed a hard link as an equivalent object */
+- equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
+-
+- if (yaffs_MknodObject
+- (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
+- equivalentObject, NULL, 0)) {
+- return equivalentObject;
+- } else {
+- return NULL;
+- }
+-
+-}
+-
+-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
+- const YCHAR *newName, int force, int shadows)
+-{
+- int unlinkOp;
+- int deleteOp;
+-
+- yaffs_Object *existingTarget;
+-
+- if (newDir == NULL)
+- newDir = obj->parent; /* use the old directory */
+-
+- if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR
+- ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
+- TENDSTR)));
+- YBUG();
+- }
+-
+- /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
+- if (obj->myDev->isYaffs2)
+- unlinkOp = (newDir == obj->myDev->unlinkedDir);
+- else
+- unlinkOp = (newDir == obj->myDev->unlinkedDir
+- && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
+-
+- deleteOp = (newDir == obj->myDev->deletedDir);
+-
+- existingTarget = yaffs_FindObjectByName(newDir, newName);
+-
+- /* If the object is a file going into the unlinked directory,
+- * then it is OK to just stuff it in since duplicate names are allowed.
+- * else only proceed if the new name does not exist and if we're putting
+- * it into a directory.
+- */
+- if ((unlinkOp ||
+- deleteOp ||
+- force ||
+- (shadows > 0) ||
+- !existingTarget) &&
+- newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
+- yaffs_SetObjectName(obj, newName);
+- obj->dirty = 1;
+-
+- yaffs_AddObjectToDirectory(newDir, obj);
+-
+- if (unlinkOp)
+- obj->unlinked = 1;
+-
+- /* If it is a deletion then we mark it as a shrink for gc purposes. */
+- if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
+- return YAFFS_OK;
+- }
+-
+- return YAFFS_FAIL;
+-}
+-
+-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
+- yaffs_Object *newDir, const YCHAR *newName)
+-{
+- yaffs_Object *obj = NULL;
+- yaffs_Object *existingTarget = NULL;
+- int force = 0;
+-
+-
+- if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+- YBUG();
+- if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+- YBUG();
+-
+-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
+- /* Special case for case insemsitive systems (eg. WinCE).
+- * While look-up is case insensitive, the name isn't.
+- * Therefore we might want to change x.txt to X.txt
+- */
+- if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
+- force = 1;
+-#endif
+-
+- else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
+- /* ENAMETOOLONG */
+- return YAFFS_FAIL;
+-
+- obj = yaffs_FindObjectByName(oldDir, oldName);
+-
+- if (obj && obj->renameAllowed) {
+-
+- /* Now do the handling for an existing target, if there is one */
+-
+- existingTarget = yaffs_FindObjectByName(newDir, newName);
+- if (existingTarget &&
+- existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+- !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
+- /* There is a target that is a non-empty directory, so we fail */
+- return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
+- } else if (existingTarget && existingTarget != obj) {
+- /* Nuke the target first, using shadowing,
+- * but only if it isn't the same object
+- */
+- yaffs_ChangeObjectName(obj, newDir, newName, force,
+- existingTarget->objectId);
+- yaffs_UnlinkObject(existingTarget);
+- }
+-
+- return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
+- }
+- return YAFFS_FAIL;
+-}
+-
+-/*------------------------- Block Management and Page Allocation ----------------*/
+-
+-static int yaffs_InitialiseBlocks(yaffs_Device *dev)
+-{
+- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+-
+- dev->blockInfo = NULL;
+- dev->chunkBits = NULL;
+-
+- dev->allocationBlock = -1; /* force it to get a new one */
+-
+- /* If the first allocation strategy fails, thry the alternate one */
+- dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
+- if (!dev->blockInfo) {
+- dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
+- dev->blockInfoAlt = 1;
+- } else
+- dev->blockInfoAlt = 0;
+-
+- if (dev->blockInfo) {
+- /* Set up dynamic blockinfo stuff. */
+- dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
+- dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
+- if (!dev->chunkBits) {
+- dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
+- dev->chunkBitsAlt = 1;
+- } else
+- dev->chunkBitsAlt = 0;
+- }
+-
+- if (dev->blockInfo && dev->chunkBits) {
+- memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
+- memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
+- return YAFFS_OK;
+- }
+-
+- return YAFFS_FAIL;
+-}
+-
+-static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
+-{
+- if (dev->blockInfoAlt && dev->blockInfo)
+- YFREE_ALT(dev->blockInfo);
+- else if (dev->blockInfo)
+- YFREE(dev->blockInfo);
+-
+- dev->blockInfoAlt = 0;
+-
+- dev->blockInfo = NULL;
+-
+- if (dev->chunkBitsAlt && dev->chunkBits)
+- YFREE_ALT(dev->chunkBits);
+- else if (dev->chunkBits)
+- YFREE(dev->chunkBits);
+- dev->chunkBitsAlt = 0;
+- dev->chunkBits = NULL;
+-}
+-
+-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
+- yaffs_BlockInfo *bi)
+-{
+- int i;
+- __u32 seq;
+- yaffs_BlockInfo *b;
+-
+- if (!dev->isYaffs2)
+- return 1; /* disqualification only applies to yaffs2. */
+-
+- if (!bi->hasShrinkHeader)
+- return 1; /* can gc */
+-
+- /* Find the oldest dirty sequence number if we don't know it and save it
+- * so we don't have to keep recomputing it.
+- */
+- if (!dev->oldestDirtySequence) {
+- seq = dev->sequenceNumber;
+-
+- for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
+- i++) {
+- b = yaffs_GetBlockInfo(dev, i);
+- if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
+- (b->pagesInUse - b->softDeletions) <
+- dev->nChunksPerBlock && b->sequenceNumber < seq) {
+- seq = b->sequenceNumber;
+- }
+- }
+- dev->oldestDirtySequence = seq;
+- }
+-
+- /* Can't do gc of this block if there are any blocks older than this one that have
+- * discarded pages.
+- */
+- return (bi->sequenceNumber <= dev->oldestDirtySequence);
+-}
+-
+-/* FindDiretiestBlock is used to select the dirtiest block (or close enough)
+- * for garbage collection.
+- */
+-
+-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
+- int aggressive)
+-{
+- int b = dev->currentDirtyChecker;
+-
+- int i;
+- int iterations;
+- int dirtiest = -1;
+- int pagesInUse = 0;
+- int prioritised = 0;
+- yaffs_BlockInfo *bi;
+- int pendingPrioritisedExist = 0;
+-
+- /* First let's see if we need to grab a prioritised block */
+- if (dev->hasPendingPrioritisedGCs) {
+- for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
+-
+- bi = yaffs_GetBlockInfo(dev, i);
+- /* yaffs_VerifyBlock(dev,bi,i); */
+-
+- if (bi->gcPrioritise) {
+- pendingPrioritisedExist = 1;
+- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+- pagesInUse = (bi->pagesInUse - bi->softDeletions);
+- dirtiest = i;
+- prioritised = 1;
+- aggressive = 1; /* Fool the non-aggressive skip logiv below */
+- }
+- }
+- }
+-
+- if (!pendingPrioritisedExist) /* None found, so we can clear this */
+- dev->hasPendingPrioritisedGCs = 0;
+- }
+-
+- /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
+- * search harder.
+- * else (we're doing a leasurely gc), then we only bother to do this if the
+- * block has only a few pages in use.
+- */
+-
+- dev->nonAggressiveSkip--;
+-
+- if (!aggressive && (dev->nonAggressiveSkip > 0))
+- return -1;
+-
+- if (!prioritised)
+- pagesInUse =
+- (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
+-
+- if (aggressive)
+- iterations =
+- dev->internalEndBlock - dev->internalStartBlock + 1;
+- else {
+- iterations =
+- dev->internalEndBlock - dev->internalStartBlock + 1;
+- iterations = iterations / 16;
+- if (iterations > 200)
+- iterations = 200;
+- }
+-
+- for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
+- b++;
+- if (b < dev->internalStartBlock || b > dev->internalEndBlock)
+- b = dev->internalStartBlock;
+-
+- if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("**>> Block %d is not valid" TENDSTR), b));
+- YBUG();
+- }
+-
+- bi = yaffs_GetBlockInfo(dev, b);
+-
+- if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
+- (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
+- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
+- dirtiest = b;
+- pagesInUse = (bi->pagesInUse - bi->softDeletions);
+- }
+- }
+-
+- dev->currentDirtyChecker = b;
+-
+- if (dirtiest > 0) {
+- T(YAFFS_TRACE_GC,
+- (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
+- dev->nChunksPerBlock - pagesInUse, prioritised));
+- }
+-
+- dev->oldestDirtySequence = 0;
+-
+- if (dirtiest > 0)
+- dev->nonAggressiveSkip = 4;
+-
+- return dirtiest;
+-}
+-
+-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
+-{
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
+-
+- int erasedOk = 0;
+-
+- /* If the block is still healthy erase it and mark as clean.
+- * If the block has had a data failure, then retire it.
+- */
+-
+- T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
+- (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
+- blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
+-
+- bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
+-
+- if (!bi->needsRetiring) {
+- yaffs_InvalidateCheckpoint(dev);
+- erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
+- if (!erasedOk) {
+- dev->nErasureFailures++;
+- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+- (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
+- }
+- }
+-
+- if (erasedOk &&
+- ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
+- int i;
+- for (i = 0; i < dev->nChunksPerBlock; i++) {
+- if (!yaffs_CheckChunkErased
+- (dev, blockNo * dev->nChunksPerBlock + i)) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- (">>Block %d erasure supposedly OK, but chunk %d not erased"
+- TENDSTR), blockNo, i));
+- }
+- }
+- }
+-
+- if (erasedOk) {
+- /* Clean it up... */
+- bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
+- dev->nErasedBlocks++;
+- bi->pagesInUse = 0;
+- bi->softDeletions = 0;
+- bi->hasShrinkHeader = 0;
+- bi->skipErasedCheck = 1; /* This is clean, so no need to check */
+- bi->gcPrioritise = 0;
+- yaffs_ClearChunkBits(dev, blockNo);
+-
+- T(YAFFS_TRACE_ERASE,
+- (TSTR("Erased block %d" TENDSTR), blockNo));
+- } else {
+- dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
+-
+- yaffs_RetireBlock(dev, blockNo);
+- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+- (TSTR("**>> Block %d retired" TENDSTR), blockNo));
+- }
+-}
+-
+-static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
+-{
+- int i;
+-
+- yaffs_BlockInfo *bi;
+-
+- if (dev->nErasedBlocks < 1) {
+- /* Hoosterman we've got a problem.
+- * Can't get space to gc
+- */
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
+-
+- return -1;
+- }
+-
+- /* Find an empty block. */
+-
+- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
+- dev->allocationBlockFinder++;
+- if (dev->allocationBlockFinder < dev->internalStartBlock
+- || dev->allocationBlockFinder > dev->internalEndBlock) {
+- dev->allocationBlockFinder = dev->internalStartBlock;
+- }
+-
+- bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
+-
+- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
+- bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
+- dev->sequenceNumber++;
+- bi->sequenceNumber = dev->sequenceNumber;
+- dev->nErasedBlocks--;
+- T(YAFFS_TRACE_ALLOCATE,
+- (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
+- dev->allocationBlockFinder, dev->sequenceNumber,
+- dev->nErasedBlocks));
+- return dev->allocationBlockFinder;
+- }
+- }
+-
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR
+- ("yaffs tragedy: no more erased blocks, but there should have been %d"
+- TENDSTR), dev->nErasedBlocks));
+-
+- return -1;
+-}
+-
+-
+-
+-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
+-{
+- if (!dev->nCheckpointBlocksRequired &&
+- dev->isYaffs2) {
+- /* Not a valid value so recalculate */
+- int nBytes = 0;
+- int nBlocks;
+- int devBlocks = (dev->endBlock - dev->startBlock + 1);
+- int tnodeSize;
+-
+- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+-
+- if (tnodeSize < sizeof(yaffs_Tnode))
+- tnodeSize = sizeof(yaffs_Tnode);
+-
+- nBytes += sizeof(yaffs_CheckpointValidity);
+- nBytes += sizeof(yaffs_CheckpointDevice);
+- nBytes += devBlocks * sizeof(yaffs_BlockInfo);
+- nBytes += devBlocks * dev->chunkBitmapStride;
+- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
+- nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
+- nBytes += sizeof(yaffs_CheckpointValidity);
+- nBytes += sizeof(__u32); /* checksum*/
+-
+- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
+-
+- nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
+-
+- dev->nCheckpointBlocksRequired = nBlocks;
+- }
+-
+- return dev->nCheckpointBlocksRequired;
+-}
+-
+-/*
+- * Check if there's space to allocate...
+- * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
+- */
+-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
+-{
+- int reservedChunks;
+- int reservedBlocks = dev->nReservedBlocks;
+- int checkpointBlocks;
+-
+- if (dev->isYaffs2) {
+- checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
+- dev->blocksInCheckpoint;
+- if (checkpointBlocks < 0)
+- checkpointBlocks = 0;
+- } else {
+- checkpointBlocks = 0;
+- }
+-
+- reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
+-
+- return (dev->nFreeChunks > reservedChunks);
+-}
+-
+-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
+- yaffs_BlockInfo **blockUsedPtr)
+-{
+- int retVal;
+- yaffs_BlockInfo *bi;
+-
+- if (dev->allocationBlock < 0) {
+- /* Get next block to allocate off */
+- dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
+- dev->allocationPage = 0;
+- }
+-
+- if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
+- /* Not enough space to allocate unless we're allowed to use the reserve. */
+- return -1;
+- }
+-
+- if (dev->nErasedBlocks < dev->nReservedBlocks
+- && dev->allocationPage == 0) {
+- T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
+- }
+-
+- /* Next page please.... */
+- if (dev->allocationBlock >= 0) {
+- bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
+-
+- retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
+- dev->allocationPage;
+- bi->pagesInUse++;
+- yaffs_SetChunkBit(dev, dev->allocationBlock,
+- dev->allocationPage);
+-
+- dev->allocationPage++;
+-
+- dev->nFreeChunks--;
+-
+- /* If the block is full set the state to full */
+- if (dev->allocationPage >= dev->nChunksPerBlock) {
+- bi->blockState = YAFFS_BLOCK_STATE_FULL;
+- dev->allocationBlock = -1;
+- }
+-
+- if (blockUsedPtr)
+- *blockUsedPtr = bi;
+-
+- return retVal;
+- }
+-
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
+-
+- return -1;
+-}
+-
+-static int yaffs_GetErasedChunks(yaffs_Device *dev)
+-{
+- int n;
+-
+- n = dev->nErasedBlocks * dev->nChunksPerBlock;
+-
+- if (dev->allocationBlock > 0)
+- n += (dev->nChunksPerBlock - dev->allocationPage);
+-
+- return n;
+-
+-}
+-
+-static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
+- int wholeBlock)
+-{
+- int oldChunk;
+- int newChunk;
+- int markNAND;
+- int retVal = YAFFS_OK;
+- int cleanups = 0;
+- int i;
+- int isCheckpointBlock;
+- int matchingChunk;
+- int maxCopies;
+-
+- int chunksBefore = yaffs_GetErasedChunks(dev);
+- int chunksAfter;
+-
+- yaffs_ExtendedTags tags;
+-
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
+-
+- yaffs_Object *object;
+-
+- isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
+-
+- bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
+-
+- T(YAFFS_TRACE_TRACING,
+- (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
+- block,
+- bi->pagesInUse,
+- bi->hasShrinkHeader,
+- wholeBlock));
+-
+- /*yaffs_VerifyFreeChunks(dev); */
+-
+- bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
+-
+- /* Take off the number of soft deleted entries because
+- * they're going to get really deleted during GC.
+- */
+- dev->nFreeChunks -= bi->softDeletions;
+-
+- dev->isDoingGC = 1;
+-
+- if (isCheckpointBlock ||
+- !yaffs_StillSomeChunkBits(dev, block)) {
+- T(YAFFS_TRACE_TRACING,
+- (TSTR
+- ("Collecting block %d that has no chunks in use" TENDSTR),
+- block));
+- yaffs_BlockBecameDirty(dev, block);
+- } else {
+-
+- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+-
+- yaffs_VerifyBlock(dev, bi, block);
+-
+- maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
+- oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
+-
+- for (/* init already done */;
+- retVal == YAFFS_OK &&
+- dev->gcChunk < dev->nChunksPerBlock &&
+- (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
+- maxCopies > 0;
+- dev->gcChunk++, oldChunk++) {
+- if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
+-
+- /* This page is in use and might need to be copied off */
+-
+- maxCopies--;
+-
+- markNAND = 1;
+-
+- yaffs_InitialiseTags(&tags);
+-
+- yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
+- buffer, &tags);
+-
+- object =
+- yaffs_FindObjectByNumber(dev,
+- tags.objectId);
+-
+- T(YAFFS_TRACE_GC_DETAIL,
+- (TSTR
+- ("Collecting chunk in block %d, %d %d %d " TENDSTR),
+- dev->gcChunk, tags.objectId, tags.chunkId,
+- tags.byteCount));
+-
+- if (object && !yaffs_SkipVerification(dev)) {
+- if (tags.chunkId == 0)
+- matchingChunk = object->hdrChunk;
+- else if (object->softDeleted)
+- matchingChunk = oldChunk; /* Defeat the test */
+- else
+- matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
+-
+- if (oldChunk != matchingChunk)
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
+- oldChunk, matchingChunk, tags.objectId, tags.chunkId));
+-
+- }
+-
+- if (!object) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("page %d in gc has no object: %d %d %d "
+- TENDSTR), oldChunk,
+- tags.objectId, tags.chunkId, tags.byteCount));
+- }
+-
+- if (object &&
+- object->deleted &&
+- object->softDeleted &&
+- tags.chunkId != 0) {
+- /* Data chunk in a soft deleted file, throw it away
+- * It's a soft deleted data chunk,
+- * No need to copy this, just forget about it and
+- * fix up the object.
+- */
+-
+- object->nDataChunks--;
+-
+- if (object->nDataChunks <= 0) {
+- /* remeber to clean up the object */
+- dev->gcCleanupList[cleanups] =
+- tags.objectId;
+- cleanups++;
+- }
+- markNAND = 0;
+- } else if (0) {
+- /* Todo object && object->deleted && object->nDataChunks == 0 */
+- /* Deleted object header with no data chunks.
+- * Can be discarded and the file deleted.
+- */
+- object->hdrChunk = 0;
+- yaffs_FreeTnode(object->myDev,
+- object->variant.
+- fileVariant.top);
+- object->variant.fileVariant.top = NULL;
+- yaffs_DoGenericObjectDeletion(object);
+-
+- } else if (object) {
+- /* It's either a data chunk in a live file or
+- * an ObjectHeader, so we're interested in it.
+- * NB Need to keep the ObjectHeaders of deleted files
+- * until the whole file has been deleted off
+- */
+- tags.serialNumber++;
+-
+- dev->nGCCopies++;
+-
+- if (tags.chunkId == 0) {
+- /* It is an object Id,
+- * We need to nuke the shrinkheader flags first
+- * We no longer want the shrinkHeader flag since its work is done
+- * and if it is left in place it will mess up scanning.
+- */
+-
+- yaffs_ObjectHeader *oh;
+- oh = (yaffs_ObjectHeader *)buffer;
+- oh->isShrink = 0;
+- tags.extraIsShrinkHeader = 0;
+-
+- yaffs_VerifyObjectHeader(object, oh, &tags, 1);
+- }
+-
+- newChunk =
+- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
+-
+- if (newChunk < 0) {
+- retVal = YAFFS_FAIL;
+- } else {
+-
+- /* Ok, now fix up the Tnodes etc. */
+-
+- if (tags.chunkId == 0) {
+- /* It's a header */
+- object->hdrChunk = newChunk;
+- object->serial = tags.serialNumber;
+- } else {
+- /* It's a data chunk */
+- yaffs_PutChunkIntoFile
+- (object,
+- tags.chunkId,
+- newChunk, 0);
+- }
+- }
+- }
+-
+- if (retVal == YAFFS_OK)
+- yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
+-
+- }
+- }
+-
+- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+-
+-
+- /* Do any required cleanups */
+- for (i = 0; i < cleanups; i++) {
+- /* Time to delete the file too */
+- object =
+- yaffs_FindObjectByNumber(dev,
+- dev->gcCleanupList[i]);
+- if (object) {
+- yaffs_FreeTnode(dev,
+- object->variant.fileVariant.
+- top);
+- object->variant.fileVariant.top = NULL;
+- T(YAFFS_TRACE_GC,
+- (TSTR
+- ("yaffs: About to finally delete object %d"
+- TENDSTR), object->objectId));
+- yaffs_DoGenericObjectDeletion(object);
+- object->myDev->nDeletedFiles--;
+- }
+-
+- }
+-
+- }
+-
+- yaffs_VerifyCollectedBlock(dev, bi, block);
++ if (chunkId > YAFFS_MAX_CHUNK_ID)
++ return NULL;
+
+- chunksAfter = yaffs_GetErasedChunks(dev);
+- if (chunksBefore >= chunksAfter) {
+- T(YAFFS_TRACE_GC,
+- (TSTR
+- ("gc did not increase free chunks before %d after %d"
+- TENDSTR), chunksBefore, chunksAfter));
+- }
++ /* First check we're tall enough (ie enough topLevel) */
+
+- /* If the gc completed then clear the current gcBlock so that we find another. */
+- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
+- dev->gcBlock = -1;
+- dev->gcChunk = 0;
++ x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (x) {
++ x >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
+ }
+
+- dev->isDoingGC = 0;
+-
+- return retVal;
+-}
+
+-/* New garbage collector
+- * If we're very low on erased blocks then we do aggressive garbage collection
+- * otherwise we do "leasurely" garbage collection.
+- * Aggressive gc looks further (whole array) and will accept less dirty blocks.
+- * Passive gc only inspects smaller areas and will only accept more dirty blocks.
+- *
+- * The idea is to help clear out space in a more spread-out manner.
+- * Dunno if it really does anything useful.
+- */
+-static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
+-{
+- int block;
+- int aggressive;
+- int gcOk = YAFFS_OK;
+- int maxTries = 0;
++ if (requiredTallness > fStruct->topLevel) {
++ /* Not tall enough, gotta make the tree taller */
++ for (i = fStruct->topLevel; i < requiredTallness; i++) {
+
+- int checkpointBlockAdjust;
++ tn = yaffs_GetTnode(dev);
+
+- if (dev->isDoingGC) {
+- /* Bail out so we don't get recursive gc */
+- return YAFFS_OK;
++ if (tn) {
++ tn->internal[0] = fStruct->top;
++ fStruct->top = tn;
++ fStruct->topLevel++;
++ } else {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs: no more tnodes" TENDSTR)));
++ return NULL;
++ }
++ }
+ }
+
+- /* This loop should pass the first time.
+- * We'll only see looping here if the erase of the collected block fails.
+- */
+-
+- do {
+- maxTries++;
+-
+- checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+- if (checkpointBlockAdjust < 0)
+- checkpointBlockAdjust = 0;
++ /* Traverse down to level 0, adding anything we need */
+
+- if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
+- /* We need a block soon...*/
+- aggressive = 1;
+- } else {
+- /* We're in no hurry */
+- aggressive = 0;
+- }
++ l = fStruct->topLevel;
++ tn = fStruct->top;
+
+- if (dev->gcBlock <= 0) {
+- dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
+- dev->gcChunk = 0;
+- }
++ if (l > 0) {
++ while (l > 0 && tn) {
++ x = (chunkId >>
++ (YAFFS_TNODES_LEVEL0_BITS +
++ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
++ YAFFS_TNODES_INTERNAL_MASK;
+
+- block = dev->gcBlock;
+
+- if (block > 0) {
+- dev->garbageCollections++;
+- if (!aggressive)
+- dev->passiveGarbageCollections++;
++ if ((l > 1) && !tn->internal[x]) {
++ /* Add missing non-level-zero tnode */
++ tn->internal[x] = yaffs_GetTnode(dev);
++ if(!tn->internal[x])
++ return NULL;
++ } else if (l == 1) {
++ /* Looking from level 1 at level 0 */
++ if (passedTn) {
++ /* If we already have one, then release it.*/
++ if (tn->internal[x])
++ yaffs_FreeTnode(dev, tn->internal[x]);
++ tn->internal[x] = passedTn;
+
+- T(YAFFS_TRACE_GC,
+- (TSTR
+- ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
+- dev->nErasedBlocks, aggressive));
++ } else if (!tn->internal[x]) {
++ /* Don't have one, none passed in */
++ tn->internal[x] = yaffs_GetTnode(dev);
++ if(!tn->internal[x])
++ return NULL;
++ }
++ }
+
+- gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
++ tn = tn->internal[x];
++ l--;
+ }
+-
+- if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
+- T(YAFFS_TRACE_GC,
+- (TSTR
+- ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
+- TENDSTR), dev->nErasedBlocks, maxTries, block));
++ } else {
++ /* top is level 0 */
++ if (passedTn) {
++ memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
++ yaffs_FreeTnode(dev, passedTn);
+ }
+- } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
+- (block > 0) &&
+- (maxTries < 2));
++ }
+
+- return aggressive ? gcOk : YAFFS_OK;
++ return tn;
+ }
+
+-/*------------------------- TAGS --------------------------------*/
+-
+-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
+- int chunkInObject)
++static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
++ yaffs_ExtendedTags *tags, int objectId,
++ int chunkInInode)
+ {
+- return (tags->chunkId == chunkInObject &&
+- tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
++ int j;
+
++ for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
++ if (yaffs_CheckChunkBit(dev, theChunk / dev->param.nChunksPerBlock,
++ theChunk % dev->param.nChunksPerBlock)) {
++
++ if(dev->chunkGroupSize == 1)
++ return theChunk;
++ else {
++ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
++ tags);
++ if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
++ /* found it; */
++ return theChunk;
++ }
++ }
++ }
++ theChunk++;
++ }
++ return -1;
+ }
+
++#if 0
++/* Experimental code not being used yet. Might speed up file deletion */
++/* DeleteWorker scans backwards through the tnode tree and deletes all the
++ * chunks and tnodes in the file.
++ * Returns 1 if the tree was deleted.
++ * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
++ */
+
+-/*-------------------- Data file manipulation -----------------*/
+-
+-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
+- yaffs_ExtendedTags *tags)
++static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
++ int chunkOffset, int *limit)
+ {
+- /*Get the Tnode, then get the level 0 offset chunk offset */
+- yaffs_Tnode *tn;
+- int theChunk = -1;
+- yaffs_ExtendedTags localTags;
+- int retVal = -1;
+-
++ int i;
++ int chunkInInode;
++ int theChunk;
++ yaffs_ExtendedTags tags;
++ int foundChunk;
+ yaffs_Device *dev = in->myDev;
+
+- if (!tags) {
+- /* Passed a NULL, so use our own tags space */
+- tags = &localTags;
+- }
+-
+- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
++ int allDone = 1;
+
+ if (tn) {
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++ if (level > 0) {
++ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
++ i--) {
++ if (tn->internal[i]) {
++ if (limit && (*limit) < 0) {
++ allDone = 0;
++ } else {
++ allDone =
++ yaffs_DeleteWorker(in,
++ tn->
++ internal
++ [i],
++ level -
++ 1,
++ (chunkOffset
++ <<
++ YAFFS_TNODES_INTERNAL_BITS)
++ + i,
++ limit);
++ }
++ if (allDone) {
++ yaffs_FreeTnode(dev,
++ tn->
++ internal[i]);
++ tn->internal[i] = NULL;
++ }
++ }
++ }
++ return (allDone) ? 1 : 0;
++ } else if (level == 0) {
++ int hitLimit = 0;
+
+- retVal =
+- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+- chunkInInode);
+- }
+- return retVal;
+-}
++ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
++ i--) {
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ if (theChunk) {
+
+-static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
+- yaffs_ExtendedTags *tags)
+-{
+- /* Get the Tnode, then get the level 0 offset chunk offset */
+- yaffs_Tnode *tn;
+- int theChunk = -1;
+- yaffs_ExtendedTags localTags;
++ chunkInInode = (chunkOffset <<
++ YAFFS_TNODES_LEVEL0_BITS) + i;
++
++ foundChunk =
++ yaffs_FindChunkInGroup(dev,
++ theChunk,
++ &tags,
++ in->objectId,
++ chunkInInode);
++
++ if (foundChunk > 0) {
++ yaffs_DeleteChunk(dev,
++ foundChunk, 1,
++ __LINE__);
++ in->nDataChunks--;
++ if (limit) {
++ *limit = *limit - 1;
++ if (*limit <= 0)
++ hitLimit = 1;
++ }
+
+- yaffs_Device *dev = in->myDev;
+- int retVal = -1;
++ }
++
++ yaffs_LoadLevel0Tnode(dev, tn, i, 0);
++ }
++
++ }
++ return (i < 0) ? 1 : 0;
++
++ }
+
+- if (!tags) {
+- /* Passed a NULL, so use our own tags space */
+- tags = &localTags;
+ }
+
+- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
++ return 1;
+
+- if (tn) {
++}
+
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++#endif
+
+- retVal =
+- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
+- chunkInInode);
++static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
++{
++ yaffs_BlockInfo *theBlock;
++ unsigned blockNo;
+
+- /* Delete the entry in the filestructure (if found) */
+- if (retVal != -1)
+- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0);
+- }
++ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
+
+- return retVal;
++ blockNo = chunk / dev->param.nChunksPerBlock;
++ theBlock = yaffs_GetBlockInfo(dev, blockNo);
++ if (theBlock) {
++ theBlock->softDeletions++;
++ dev->nFreeChunks++;
++ yaffs2_UpdateOldestDirtySequence(dev, blockNo, theBlock);
++ }
+ }
+
+-#ifdef YAFFS_PARANOID
++/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
++ * All soft deleting does is increment the block's softdelete count and pulls the chunk out
++ * of the tnode.
++ * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
++ */
+
+-static int yaffs_CheckFileSanity(yaffs_Object *in)
++static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
++ __u32 level, int chunkOffset)
+ {
+- int chunk;
+- int nChunks;
+- int fSize;
+- int failed = 0;
+- int objId;
+- yaffs_Tnode *tn;
+- yaffs_Tags localTags;
+- yaffs_Tags *tags = &localTags;
++ int i;
+ int theChunk;
+- int chunkDeleted;
++ int allDone = 1;
++ yaffs_Device *dev = in->myDev;
+
+- if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+- return YAFFS_FAIL;
++ if (tn) {
++ if (level > 0) {
+
+- objId = in->objectId;
+- fSize = in->variant.fileVariant.fileSize;
+- nChunks =
+- (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
+-
+- for (chunk = 1; chunk <= nChunks; chunk++) {
+- tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
+- chunk);
+-
+- if (tn) {
+-
+- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
+-
+- if (yaffs_CheckChunkBits
+- (dev, theChunk / dev->nChunksPerBlock,
+- theChunk % dev->nChunksPerBlock)) {
+-
+- yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
+- tags,
+- &chunkDeleted);
+- if (yaffs_TagsMatch
+- (tags, in->objectId, chunk, chunkDeleted)) {
+- /* found it; */
++ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
++ i--) {
++ if (tn->internal[i]) {
++ allDone =
++ yaffs_SoftDeleteWorker(in,
++ tn->
++ internal[i],
++ level - 1,
++ (chunkOffset
++ <<
++ YAFFS_TNODES_INTERNAL_BITS)
++ + i);
++ if (allDone) {
++ yaffs_FreeTnode(dev,
++ tn->
++ internal[i]);
++ tn->internal[i] = NULL;
++ } else {
++ /* Hoosterman... how could this happen? */
++ }
++ }
++ }
++ return (allDone) ? 1 : 0;
++ } else if (level == 0) {
+
++ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ if (theChunk) {
++ /* Note this does not find the real chunk, only the chunk group.
++ * We make an assumption that a chunk group is not larger than
++ * a block.
++ */
++ yaffs_SoftDeleteChunk(dev, theChunk);
++ yaffs_LoadLevel0Tnode(dev, tn, i, 0);
+ }
+- } else {
+
+- failed = 1;
+ }
++ return 1;
+
+- } else {
+- /* T(("No level 0 found for %d\n", chunk)); */
+ }
++
+ }
+
+- return failed ? YAFFS_FAIL : YAFFS_OK;
++ return 1;
++
+ }
+
+-#endif
++static void yaffs_SoftDeleteFile(yaffs_Object *obj)
++{
++ if (obj->deleted &&
++ obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
++ if (obj->nDataChunks <= 0) {
++ /* Empty file with no duplicate object headers, just delete it immediately */
++ yaffs_FreeTnode(obj->myDev,
++ obj->variant.fileVariant.top);
++ obj->variant.fileVariant.top = NULL;
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("yaffs: Deleting empty file %d" TENDSTR),
++ obj->objectId));
++ yaffs_DoGenericObjectDeletion(obj);
++ } else {
++ yaffs_SoftDeleteWorker(obj,
++ obj->variant.fileVariant.top,
++ obj->variant.fileVariant.
++ topLevel, 0);
++ obj->softDeleted = 1;
++ }
++ }
++}
+
+-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
+- int chunkInNAND, int inScan)
++/* Pruning removes any part of the file structure tree that is beyond the
++ * bounds of the file (ie that does not point to chunks).
++ *
++ * A file should only get pruned when its size is reduced.
++ *
++ * Before pruning, the chunks must be pulled from the tree and the
++ * level 0 tnode entries must be zeroed out.
++ * Could also use this for file deletion, but that's probably better handled
++ * by a special case.
++ *
++ * This function is recursive. For levels > 0 the function is called again on
++ * any sub-tree. For level == 0 we just check if the sub-tree has data.
++ * If there is no data in a subtree then it is pruned.
++ */
++
++static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
++ __u32 level, int del0)
+ {
+- /* NB inScan is zero unless scanning.
+- * For forward scanning, inScan is > 0;
+- * for backward scanning inScan is < 0
+- */
++ int i;
++ int hasData;
+
+- yaffs_Tnode *tn;
+- yaffs_Device *dev = in->myDev;
+- int existingChunk;
+- yaffs_ExtendedTags existingTags;
+- yaffs_ExtendedTags newTags;
+- unsigned existingSerial, newSerial;
++ if (tn) {
++ hasData = 0;
+
+- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
+- /* Just ignore an attempt at putting a chunk into a non-file during scanning
+- * If it is not during Scanning then something went wrong!
+- */
+- if (!inScan) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs tragedy:attempt to put data chunk into a non-file"
+- TENDSTR)));
+- YBUG();
+- }
++ if(level > 0){
++ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
++ if (tn->internal[i]) {
++ tn->internal[i] =
++ yaffs_PruneWorker(dev, tn->internal[i],
++ level - 1,
++ (i == 0) ? del0 : 1);
++ }
+
+- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
+- return YAFFS_OK;
+- }
++ if (tn->internal[i])
++ hasData++;
++ }
++ } else {
++ int tnodeSize_u32 = dev->tnodeSize/sizeof(__u32);
++ __u32 *map = (__u32 *)tn;
+
+- tn = yaffs_AddOrFindLevel0Tnode(dev,
+- &in->variant.fileVariant,
+- chunkInInode,
+- NULL);
+- if (!tn)
+- return YAFFS_FAIL;
++ for(i = 0; !hasData && i < tnodeSize_u32; i++){
++ if(map[i])
++ hasData++;
++ }
++ }
+
+- existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
++ if (hasData == 0 && del0) {
++ /* Free and return NULL */
+
+- if (inScan != 0) {
+- /* If we're scanning then we need to test for duplicates
+- * NB This does not need to be efficient since it should only ever
+- * happen when the power fails during a write, then only one
+- * chunk should ever be affected.
+- *
+- * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
+- * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
+- */
++ yaffs_FreeTnode(dev, tn);
++ tn = NULL;
++ }
+
+- if (existingChunk > 0) {
+- /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
+- * thus we have to do a FindChunkInFile to get the real chunk id.
+- *
+- * We have a duplicate now we need to decide which one to use:
+- *
+- * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
+- * Forward scanning YAFFS2: The new one is what we use, dump the old one.
+- * YAFFS1: Get both sets of tags and compare serial numbers.
+- */
++ }
+
+- if (inScan > 0) {
+- /* Only do this for forward scanning */
+- yaffs_ReadChunkWithTagsFromNAND(dev,
+- chunkInNAND,
+- NULL, &newTags);
++ return tn;
+
+- /* Do a proper find */
+- existingChunk =
+- yaffs_FindChunkInFile(in, chunkInInode,
+- &existingTags);
+- }
++}
+
+- if (existingChunk <= 0) {
+- /*Hoosterman - how did this happen? */
++static int yaffs_PruneFileStructure(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct)
++{
++ int i;
++ int hasData;
++ int done = 0;
++ yaffs_Tnode *tn;
+
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs tragedy: existing chunk < 0 in scan"
+- TENDSTR)));
++ if (fStruct->topLevel > 0) {
++ fStruct->top =
++ yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
+
+- }
++ /* Now we have a tree with all the non-zero branches NULL but the height
++ * is the same as it was.
++ * Let's see if we can trim internal tnodes to shorten the tree.
++ * We can do this if only the 0th element in the tnode is in use
++ * (ie all the non-zero are NULL)
++ */
+
+- /* NB The deleted flags should be false, otherwise the chunks will
+- * not be loaded during a scan
+- */
++ while (fStruct->topLevel && !done) {
++ tn = fStruct->top;
+
+- if (inScan > 0) {
+- newSerial = newTags.serialNumber;
+- existingSerial = existingTags.serialNumber;
++ hasData = 0;
++ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
++ if (tn->internal[i])
++ hasData++;
+ }
+-
+- if ((inScan > 0) &&
+- (in->myDev->isYaffs2 ||
+- existingChunk <= 0 ||
+- ((existingSerial + 1) & 3) == newSerial)) {
+- /* Forward scanning.
+- * Use new
+- * Delete the old one and drop through to update the tnode
+- */
+- yaffs_DeleteChunk(dev, existingChunk, 1,
+- __LINE__);
+- } else {
+- /* Backward scanning or we want to use the existing one
+- * Use existing.
+- * Delete the new one and return early so that the tnode isn't changed
+- */
+- yaffs_DeleteChunk(dev, chunkInNAND, 1,
+- __LINE__);
+- return YAFFS_OK;
++
++ if (!hasData) {
++ fStruct->top = tn->internal[0];
++ fStruct->topLevel--;
++ yaffs_FreeTnode(dev, tn);
++ } else {
++ done = 1;
+ }
+ }
+-
+ }
+
+- if (existingChunk == 0)
+- in->nDataChunks++;
+-
+- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
+-
+ return YAFFS_OK;
+ }
+
+-static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
+- __u8 *buffer)
+-{
+- int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
+-
+- if (chunkInNAND >= 0)
+- return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
+- buffer, NULL);
+- else {
+- T(YAFFS_TRACE_NANDACCESS,
+- (TSTR("Chunk %d not found zero instead" TENDSTR),
+- chunkInNAND));
+- /* get sane (zero) data if you read a hole */
+- memset(buffer, 0, in->myDev->nDataBytesPerChunk);
+- return 0;
+- }
++/*-------------------- End of File Structure functions.-------------------*/
+
+-}
+
+-void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
++/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
++static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
+ {
+- int block;
+- int page;
+- yaffs_ExtendedTags tags;
+- yaffs_BlockInfo *bi;
++ yaffs_Object *obj = yaffs_AllocateRawObject(dev);
+
+- if (chunkId <= 0)
+- return;
++ if (obj) {
++ dev->nObjects++;
+
+- dev->nDeletions++;
+- block = chunkId / dev->nChunksPerBlock;
+- page = chunkId % dev->nChunksPerBlock;
++ /* Now sweeten it up... */
+
++ memset(obj, 0, sizeof(yaffs_Object));
++ obj->beingCreated = 1;
+
+- if (!yaffs_CheckChunkBit(dev, block, page))
+- T(YAFFS_TRACE_VERIFY,
+- (TSTR("Deleting invalid chunk %d"TENDSTR),
+- chunkId));
++ obj->myDev = dev;
++ obj->hdrChunk = 0;
++ obj->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
++ YINIT_LIST_HEAD(&(obj->hardLinks));
++ YINIT_LIST_HEAD(&(obj->hashLink));
++ YINIT_LIST_HEAD(&obj->siblings);
+
+- bi = yaffs_GetBlockInfo(dev, block);
+
+- T(YAFFS_TRACE_DELETION,
+- (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
++ /* Now make the directory sane */
++ if (dev->rootDir) {
++ obj->parent = dev->rootDir;
++ ylist_add(&(obj->siblings), &dev->rootDir->variant.directoryVariant.children);
++ }
+
+- if (markNAND &&
+- bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
++ /* Add it to the lost and found directory.
++ * NB Can't put root or lostNFound in lostNFound so
++ * check if lostNFound exists first
++ */
++ if (dev->lostNFoundDir)
++ yaffs_AddObjectToDirectory(dev->lostNFoundDir, obj);
+
+- yaffs_InitialiseTags(&tags);
++ obj->beingCreated = 0;
++ }
+
+- tags.chunkDeleted = 1;
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+
+- yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
+- yaffs_HandleUpdateChunk(dev, chunkId, &tags);
+- } else {
+- dev->nUnmarkedDeletions++;
+- }
++ return obj;
++}
+
+- /* Pull out of the management area.
+- * If the whole block became dirty, this will kick off an erasure.
+- */
+- if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
+- bi->blockState == YAFFS_BLOCK_STATE_FULL ||
+- bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+- bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
+- dev->nFreeChunks++;
++static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
++ __u32 mode)
++{
+
+- yaffs_ClearChunkBit(dev, block, page);
++ yaffs_Object *obj =
++ yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
++ if (obj) {
++ obj->fake = 1; /* it is fake so it might have no NAND presence... */
++ obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
++ obj->unlinkAllowed = 0; /* ... or unlink it */
++ obj->deleted = 0;
++ obj->unlinked = 0;
++ obj->yst_mode = mode;
++ obj->myDev = dev;
++ obj->hdrChunk = 0; /* Not a valid chunk. */
++ }
+
+- bi->pagesInUse--;
++ return obj;
+
+- if (bi->pagesInUse == 0 &&
+- !bi->hasShrinkHeader &&
+- bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
+- bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+- yaffs_BlockBecameDirty(dev, block);
+- }
++}
+
+- }
++static void yaffs_UnhashObject(yaffs_Object *obj)
++{
++ int bucket;
++ yaffs_Device *dev = obj->myDev;
+
++ /* If it is still linked into the bucket list, free from the list */
++ if (!ylist_empty(&obj->hashLink)) {
++ ylist_del_init(&obj->hashLink);
++ bucket = yaffs_HashFunction(obj->objectId);
++ dev->objectBucket[bucket].count--;
++ }
+ }
+
+-static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
+- const __u8 *buffer, int nBytes,
+- int useReserve)
++/* FreeObject frees up a Object and puts it back on the free list */
++static void yaffs_FreeObject(yaffs_Object *obj)
+ {
+- /* Find old chunk Need to do this to get serial number
+- * Write new one and patch into tree.
+- * Invalidate old tags.
+- */
++ yaffs_Device *dev = obj->myDev;
+
+- int prevChunkId;
+- yaffs_ExtendedTags prevTags;
++ T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), obj, obj->myInode));
+
+- int newChunkId;
+- yaffs_ExtendedTags newTags;
++ if (!obj)
++ YBUG();
++ if (obj->parent)
++ YBUG();
++ if (!ylist_empty(&obj->siblings))
++ YBUG();
+
+- yaffs_Device *dev = in->myDev;
+
+- yaffs_CheckGarbageCollection(dev);
++ if (obj->myInode) {
++ /* We're still hooked up to a cached inode.
++ * Don't delete now, but mark for later deletion
++ */
++ obj->deferedFree = 1;
++ return;
++ }
++
++ yaffs_UnhashObject(obj);
+
+- /* Get the previous chunk at this location in the file if it exists */
+- prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
++ yaffs_FreeRawObject(dev,obj);
++ dev->nObjects--;
++ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
++}
+
+- /* Set up new tags */
+- yaffs_InitialiseTags(&newTags);
+
+- newTags.chunkId = chunkInInode;
+- newTags.objectId = in->objectId;
+- newTags.serialNumber =
+- (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
+- newTags.byteCount = nBytes;
++void yaffs_HandleDeferedFree(yaffs_Object *obj)
++{
++ if (obj->deferedFree)
++ yaffs_FreeObject(obj);
++}
+
+- if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
+- YBUG();
++static void yaffs_InitialiseTnodesAndObjects(yaffs_Device *dev)
++{
++ int i;
++
++ dev->nObjects = 0;
++ dev->nTnodes = 0;
++
++ yaffs_InitialiseRawTnodesAndObjects(dev);
++
++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
++ YINIT_LIST_HEAD(&dev->objectBucket[i].list);
++ dev->objectBucket[i].count = 0;
+ }
++}
+
+- newChunkId =
+- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+- useReserve);
++static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
++{
++ int i;
++ int l = 999;
++ int lowest = 999999;
+
+- if (newChunkId >= 0) {
+- yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
+
+- if (prevChunkId >= 0)
+- yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
++ /* Search for the shortest list or one that
++ * isn't too long.
++ */
++
++ for (i = 0; i < 10 && lowest > 4; i++) {
++ dev->bucketFinder++;
++ dev->bucketFinder %= YAFFS_NOBJECT_BUCKETS;
++ if (dev->objectBucket[dev->bucketFinder].count < lowest) {
++ lowest = dev->objectBucket[dev->bucketFinder].count;
++ l = dev->bucketFinder;
++ }
+
+- yaffs_CheckFileSanity(in);
+ }
+- return newChunkId;
+
++ return l;
+ }
+
+-/* UpdateObjectHeader updates the header on NAND for an object.
+- * If name is not NULL, then that new name is used.
+- */
+-int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
+- int isShrink, int shadows)
++static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
+ {
++ int bucket = yaffs_FindNiceObjectBucket(dev);
+
+- yaffs_BlockInfo *bi;
++ /* Now find an object value that has not already been taken
++ * by scanning the list.
++ */
+
+- yaffs_Device *dev = in->myDev;
++ int found = 0;
++ struct ylist_head *i;
+
+- int prevChunkId;
+- int retVal = 0;
+- int result = 0;
++ __u32 n = (__u32) bucket;
+
+- int newChunkId;
+- yaffs_ExtendedTags newTags;
+- yaffs_ExtendedTags oldTags;
++ /* yaffs_CheckObjectHashSanity(); */
+
+- __u8 *buffer = NULL;
+- YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
++ while (!found) {
++ found = 1;
++ n += YAFFS_NOBJECT_BUCKETS;
++ if (1 || dev->objectBucket[bucket].count > 0) {
++ ylist_for_each(i, &dev->objectBucket[bucket].list) {
++ /* If there is already one in the list */
++ if (i && ylist_entry(i, yaffs_Object,
++ hashLink)->objectId == n) {
++ found = 0;
++ }
++ }
++ }
++ }
+
+- yaffs_ObjectHeader *oh = NULL;
++ return n;
++}
+
+- yaffs_strcpy(oldName, _Y("silly old name"));
++static void yaffs_HashObject(yaffs_Object *in)
++{
++ int bucket = yaffs_HashFunction(in->objectId);
++ yaffs_Device *dev = in->myDev;
+
++ ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
++ dev->objectBucket[bucket].count++;
++}
+
+- if (!in->fake ||
+- in == dev->rootDir || /* The rootDir should also be saved */
+- force) {
++yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
++{
++ int bucket = yaffs_HashFunction(number);
++ struct ylist_head *i;
++ yaffs_Object *in;
+
+- yaffs_CheckGarbageCollection(dev);
+- yaffs_CheckObjectDetailsLoaded(in);
++ ylist_for_each(i, &dev->objectBucket[bucket].list) {
++ /* Look if it is in the list */
++ if (i) {
++ in = ylist_entry(i, yaffs_Object, hashLink);
++ if (in->objectId == number) {
+
+- buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
+- oh = (yaffs_ObjectHeader *) buffer;
++ /* Don't tell the VFS about this one if it is defered free */
++ if (in->deferedFree)
++ return NULL;
+
+- prevChunkId = in->hdrChunk;
++ return in;
++ }
++ }
++ }
+
+- if (prevChunkId > 0) {
+- result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
+- buffer, &oldTags);
++ return NULL;
++}
+
+- yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
++yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
++ yaffs_ObjectType type)
++{
++ yaffs_Object *theObject=NULL;
++ yaffs_Tnode *tn = NULL;
++
++ if (number < 0)
++ number = yaffs_CreateNewObjectNumber(dev);
+
+- memcpy(oldName, oh->name, sizeof(oh->name));
+- }
++ if (type == YAFFS_OBJECT_TYPE_FILE) {
++ tn = yaffs_GetTnode(dev);
++ if (!tn)
++ return NULL;
++ }
+
+- memset(buffer, 0xFF, dev->nDataBytesPerChunk);
++ theObject = yaffs_AllocateEmptyObject(dev);
++ if (!theObject){
++ if(tn)
++ yaffs_FreeTnode(dev,tn);
++ return NULL;
++ }
+
+- oh->type = in->variantType;
+- oh->yst_mode = in->yst_mode;
+- oh->shadowsObject = oh->inbandShadowsObject = shadows;
+
++ if (theObject) {
++ theObject->fake = 0;
++ theObject->renameAllowed = 1;
++ theObject->unlinkAllowed = 1;
++ theObject->objectId = number;
++ yaffs_HashObject(theObject);
++ theObject->variantType = type;
+ #ifdef CONFIG_YAFFS_WINCE
+- oh->win_atime[0] = in->win_atime[0];
+- oh->win_ctime[0] = in->win_ctime[0];
+- oh->win_mtime[0] = in->win_mtime[0];
+- oh->win_atime[1] = in->win_atime[1];
+- oh->win_ctime[1] = in->win_ctime[1];
+- oh->win_mtime[1] = in->win_mtime[1];
+-#else
+- oh->yst_uid = in->yst_uid;
+- oh->yst_gid = in->yst_gid;
+- oh->yst_atime = in->yst_atime;
+- oh->yst_mtime = in->yst_mtime;
+- oh->yst_ctime = in->yst_ctime;
+- oh->yst_rdev = in->yst_rdev;
+-#endif
+- if (in->parent)
+- oh->parentObjectId = in->parent->objectId;
+- else
+- oh->parentObjectId = 0;
+-
+- if (name && *name) {
+- memset(oh->name, 0, sizeof(oh->name));
+- yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
+- } else if (prevChunkId >= 0)
+- memcpy(oh->name, oldName, sizeof(oh->name));
+- else
+- memset(oh->name, 0, sizeof(oh->name));
++ yfsd_WinFileTimeNow(theObject->win_atime);
++ theObject->win_ctime[0] = theObject->win_mtime[0] =
++ theObject->win_atime[0];
++ theObject->win_ctime[1] = theObject->win_mtime[1] =
++ theObject->win_atime[1];
+
+- oh->isShrink = isShrink;
++#else
+
+- switch (in->variantType) {
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- /* Should not happen */
+- break;
++ theObject->yst_atime = theObject->yst_mtime =
++ theObject->yst_ctime = Y_CURRENT_TIME;
++#endif
++ switch (type) {
+ case YAFFS_OBJECT_TYPE_FILE:
+- oh->fileSize =
+- (oh->parentObjectId == YAFFS_OBJECTID_DELETED
+- || oh->parentObjectId ==
+- YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
+- fileVariant.fileSize;
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- oh->equivalentObjectId =
+- in->variant.hardLinkVariant.equivalentObjectId;
+- break;
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- /* Do nothing */
++ theObject->variant.fileVariant.fileSize = 0;
++ theObject->variant.fileVariant.scannedFileSize = 0;
++ theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
++ theObject->variant.fileVariant.topLevel = 0;
++ theObject->variant.fileVariant.top = tn;
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY:
+- /* Do nothing */
++ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
++ children);
++ YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
++ dirty);
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK:
+- yaffs_strncpy(oh->alias,
+- in->variant.symLinkVariant.alias,
+- YAFFS_MAX_ALIAS_LENGTH);
+- oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* No action required */
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* todo this should not happen */
+ break;
+ }
++ }
+
+- /* Tags */
+- yaffs_InitialiseTags(&newTags);
+- in->serial++;
+- newTags.chunkId = 0;
+- newTags.objectId = in->objectId;
+- newTags.serialNumber = in->serial;
+-
+- /* Add extra info for file header */
+-
+- newTags.extraHeaderInfoAvailable = 1;
+- newTags.extraParentObjectId = oh->parentObjectId;
+- newTags.extraFileLength = oh->fileSize;
+- newTags.extraIsShrinkHeader = oh->isShrink;
+- newTags.extraEquivalentObjectId = oh->equivalentObjectId;
+- newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
+- newTags.extraObjectType = in->variantType;
+-
+- yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
++ return theObject;
++}
+
+- /* Create new chunk in NAND */
+- newChunkId =
+- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
+- (prevChunkId >= 0) ? 1 : 0);
++yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
++ int number,
++ yaffs_ObjectType type)
++{
++ yaffs_Object *theObject = NULL;
+
+- if (newChunkId >= 0) {
++ if (number > 0)
++ theObject = yaffs_FindObjectByNumber(dev, number);
+
+- in->hdrChunk = newChunkId;
++ if (!theObject)
++ theObject = yaffs_CreateNewObject(dev, number, type);
+
+- if (prevChunkId >= 0) {
+- yaffs_DeleteChunk(dev, prevChunkId, 1,
+- __LINE__);
+- }
++ return theObject;
+
+- if (!yaffs_ObjectHasCachedWriteData(in))
+- in->dirty = 0;
++}
+
+- /* If this was a shrink, then mark the block that the chunk lives on */
+- if (isShrink) {
+- bi = yaffs_GetBlockInfo(in->myDev,
+- newChunkId / in->myDev->nChunksPerBlock);
+- bi->hasShrinkHeader = 1;
+- }
+
+- }
++YCHAR *yaffs_CloneString(const YCHAR *str)
++{
++ YCHAR *newStr = NULL;
++ int len;
+
+- retVal = newChunkId;
++ if (!str)
++ str = _Y("");
+
++ len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
++ newStr = YMALLOC((len + 1) * sizeof(YCHAR));
++ if (newStr){
++ yaffs_strncpy(newStr, str,len);
++ newStr[len] = 0;
+ }
++ return newStr;
+
+- if (buffer)
+- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+-
+- return retVal;
+ }
+
+-/*------------------------ Short Operations Cache ----------------------------------------
+- * In many situations where there is no high level buffering (eg WinCE) a lot of
+- * reads might be short sequential reads, and a lot of writes may be short
+- * sequential writes. eg. scanning/writing a jpeg file.
+- * In these cases, a short read/write cache can provide a huge perfomance benefit
+- * with dumb-as-a-rock code.
+- * In Linux, the page cache provides read buffering aand the short op cache provides write
+- * buffering.
+- *
+- * There are a limited number (~10) of cache chunks per device so that we don't
+- * need a very intelligent search.
++/*
++ * Mknod (create) a new object.
++ * equivalentObject only has meaning for a hard link;
++ * aliasString only has meaning for a symlink.
++ * rdev only has meaning for devices (a subset of special objects)
+ */
+
+-static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
++static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
++ yaffs_Object *parent,
++ const YCHAR *name,
++ __u32 mode,
++ __u32 uid,
++ __u32 gid,
++ yaffs_Object *equivalentObject,
++ const YCHAR *aliasString, __u32 rdev)
+ {
+- yaffs_Device *dev = obj->myDev;
+- int i;
+- yaffs_ChunkCache *cache;
+- int nCaches = obj->myDev->nShortOpCaches;
++ yaffs_Object *in;
++ YCHAR *str = NULL;
+
+- for (i = 0; i < nCaches; i++) {
+- cache = &dev->srCache[i];
+- if (cache->object == obj &&
+- cache->dirty)
+- return 1;
++ yaffs_Device *dev = parent->myDev;
++
++ /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
++ if (yaffs_FindObjectByName(parent, name))
++ return NULL;
++
++ if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
++ str = yaffs_CloneString(aliasString);
++ if (!str)
++ return NULL;
+ }
+
+- return 0;
+-}
++ in = yaffs_CreateNewObject(dev, -1, type);
+
++ if (!in){
++ if(str)
++ YFREE(str);
++ return NULL;
++ }
+
+-static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
+-{
+- yaffs_Device *dev = obj->myDev;
+- int lowest = -99; /* Stop compiler whining. */
+- int i;
+- yaffs_ChunkCache *cache;
+- int chunkWritten = 0;
+- int nCaches = obj->myDev->nShortOpCaches;
+
+- if (nCaches > 0) {
+- do {
+- cache = NULL;
+
+- /* Find the dirty cache for this object with the lowest chunk id. */
+- for (i = 0; i < nCaches; i++) {
+- if (dev->srCache[i].object == obj &&
+- dev->srCache[i].dirty) {
+- if (!cache
+- || dev->srCache[i].chunkId <
+- lowest) {
+- cache = &dev->srCache[i];
+- lowest = cache->chunkId;
+- }
+- }
+- }
+
+- if (cache && !cache->locked) {
+- /* Write it out and free it up */
+
+- chunkWritten =
+- yaffs_WriteChunkDataToObject(cache->object,
+- cache->chunkId,
+- cache->data,
+- cache->nBytes,
+- 1);
+- cache->dirty = 0;
+- cache->object = NULL;
+- }
++ if (in) {
++ in->hdrChunk = 0;
++ in->valid = 1;
++ in->variantType = type;
+
+- } while (cache && chunkWritten > 0);
++ in->yst_mode = mode;
+
+- if (cache) {
+- /* Hoosterman, disk full while writing cache out. */
+- T(YAFFS_TRACE_ERROR,
+- (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_WinFileTimeNow(in->win_atime);
++ in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
++ in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
++
++#else
++ in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
++
++ in->yst_rdev = rdev;
++ in->yst_uid = uid;
++ in->yst_gid = gid;
++#endif
++ in->nDataChunks = 0;
++
++ yaffs_SetObjectName(in, name);
++ in->dirty = 1;
++
++ yaffs_AddObjectToDirectory(parent, in);
++
++ in->myDev = parent->myDev;
++
++ switch (type) {
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ in->variant.symLinkVariant.alias = str;
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ in->variant.hardLinkVariant.equivalentObject =
++ equivalentObject;
++ in->variant.hardLinkVariant.equivalentObjectId =
++ equivalentObject->objectId;
++ ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* do nothing */
++ break;
++ }
+
++ if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0, NULL) < 0) {
++ /* Could not create the object header, fail the creation */
++ yaffs_DeleteObject(in);
++ in = NULL;
+ }
++
++ yaffs_UpdateParent(parent);
+ }
+
++ return in;
+ }
+
+-/*yaffs_FlushEntireDeviceCache(dev)
+- *
+- *
+- */
+-
+-void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
++yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid)
+ {
+- yaffs_Object *obj;
+- int nCaches = dev->nShortOpCaches;
+- int i;
+-
+- /* Find a dirty object in the cache and flush it...
+- * until there are no further dirty objects.
+- */
+- do {
+- obj = NULL;
+- for (i = 0; i < nCaches && !obj; i++) {
+- if (dev->srCache[i].object &&
+- dev->srCache[i].dirty)
+- obj = dev->srCache[i].object;
+-
+- }
+- if (obj)
+- yaffs_FlushFilesChunkCache(obj);
++ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
++ uid, gid, NULL, NULL, 0);
++}
+
+- } while (obj);
++yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid)
++{
++ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
++ mode, uid, gid, NULL, NULL, 0);
++}
+
++yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
++{
++ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
++ uid, gid, NULL, NULL, rdev);
+ }
+
++yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
++ __u32 mode, __u32 uid, __u32 gid,
++ const YCHAR *alias)
++{
++ return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
++ uid, gid, NULL, alias, 0);
++}
+
+-/* Grab us a cache chunk for use.
+- * First look for an empty one.
+- * Then look for the least recently used non-dirty one.
+- * Then look for the least recently used dirty one...., flush and look again.
+- */
+-static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
++/* yaffs_Link returns the object id of the equivalent object.*/
++yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
++ yaffs_Object *equivalentObject)
+ {
+- int i;
++ /* Get the real object in case we were fed a hard link as an equivalent object */
++ equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
+
+- if (dev->nShortOpCaches > 0) {
+- for (i = 0; i < dev->nShortOpCaches; i++) {
+- if (!dev->srCache[i].object)
+- return &dev->srCache[i];
+- }
++ if (yaffs_MknodObject
++ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
++ equivalentObject, NULL, 0)) {
++ return equivalentObject;
++ } else {
++ return NULL;
+ }
+
+- return NULL;
+ }
+
+-static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
++static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
++ const YCHAR *newName, int force, int shadows)
+ {
+- yaffs_ChunkCache *cache;
+- yaffs_Object *theObj;
+- int usage;
+- int i;
+- int pushout;
+-
+- if (dev->nShortOpCaches > 0) {
+- /* Try find a non-dirty one... */
++ int unlinkOp;
++ int deleteOp;
+
+- cache = yaffs_GrabChunkCacheWorker(dev);
++ yaffs_Object *existingTarget;
+
+- if (!cache) {
+- /* They were all dirty, find the last recently used object and flush
+- * its cache, then find again.
+- * NB what's here is not very accurate, we actually flush the object
+- * the last recently used page.
+- */
++ if (newDir == NULL)
++ newDir = obj->parent; /* use the old directory */
+
+- /* With locking we can't assume we can use entry zero */
++ if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
++ TENDSTR)));
++ YBUG();
++ }
+
+- theObj = NULL;
+- usage = -1;
+- cache = NULL;
+- pushout = -1;
++ /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
++ if (obj->myDev->param.isYaffs2)
++ unlinkOp = (newDir == obj->myDev->unlinkedDir);
++ else
++ unlinkOp = (newDir == obj->myDev->unlinkedDir
++ && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
+
+- for (i = 0; i < dev->nShortOpCaches; i++) {
+- if (dev->srCache[i].object &&
+- !dev->srCache[i].locked &&
+- (dev->srCache[i].lastUse < usage || !cache)) {
+- usage = dev->srCache[i].lastUse;
+- theObj = dev->srCache[i].object;
+- cache = &dev->srCache[i];
+- pushout = i;
+- }
+- }
++ deleteOp = (newDir == obj->myDev->deletedDir);
+
+- if (!cache || cache->dirty) {
+- /* Flush and try again */
+- yaffs_FlushFilesChunkCache(theObj);
+- cache = yaffs_GrabChunkCacheWorker(dev);
+- }
++ existingTarget = yaffs_FindObjectByName(newDir, newName);
+
+- }
+- return cache;
+- } else
+- return NULL;
++ /* If the object is a file going into the unlinked directory,
++ * then it is OK to just stuff it in since duplicate names are allowed.
++ * else only proceed if the new name does not exist and if we're putting
++ * it into a directory.
++ */
++ if ((unlinkOp ||
++ deleteOp ||
++ force ||
++ (shadows > 0) ||
++ !existingTarget) &&
++ newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
++ yaffs_SetObjectName(obj, newName);
++ obj->dirty = 1;
+
+-}
++ yaffs_AddObjectToDirectory(newDir, obj);
+
+-/* Find a cached chunk */
+-static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
+- int chunkId)
+-{
+- yaffs_Device *dev = obj->myDev;
+- int i;
+- if (dev->nShortOpCaches > 0) {
+- for (i = 0; i < dev->nShortOpCaches; i++) {
+- if (dev->srCache[i].object == obj &&
+- dev->srCache[i].chunkId == chunkId) {
+- dev->cacheHits++;
++ if (unlinkOp)
++ obj->unlinked = 1;
+
+- return &dev->srCache[i];
+- }
+- }
++ /* If it is a deletion then we mark it as a shrink for gc purposes. */
++ if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows, NULL) >= 0)
++ return YAFFS_OK;
+ }
+- return NULL;
++
++ return YAFFS_FAIL;
+ }
+
+-/* Mark the chunk for the least recently used algorithym */
+-static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
+- int isAWrite)
++int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
++ yaffs_Object *newDir, const YCHAR *newName)
+ {
++ yaffs_Object *obj = NULL;
++ yaffs_Object *existingTarget = NULL;
++ int force = 0;
++ int result;
++ yaffs_Device *dev;
+
+- if (dev->nShortOpCaches > 0) {
+- if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
+- /* Reset the cache usages */
+- int i;
+- for (i = 1; i < dev->nShortOpCaches; i++)
+- dev->srCache[i].lastUse = 0;
+
+- dev->srLastUse = 0;
+- }
++ if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ YBUG();
++ if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ YBUG();
+
+- dev->srLastUse++;
++ dev = oldDir->myDev;
+
+- cache->lastUse = dev->srLastUse;
++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
++ /* Special case for case insemsitive systems (eg. WinCE).
++ * While look-up is case insensitive, the name isn't.
++ * Therefore we might want to change x.txt to X.txt
++ */
++ if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
++ force = 1;
++#endif
+
+- if (isAWrite)
+- cache->dirty = 1;
+- }
+-}
++ if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH)
++ /* ENAMETOOLONG */
++ return YAFFS_FAIL;
+
+-/* Invalidate a single cache page.
+- * Do this when a whole page gets written,
+- * ie the short cache for this page is no longer valid.
+- */
+-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
+-{
+- if (object->myDev->nShortOpCaches > 0) {
+- yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
++ obj = yaffs_FindObjectByName(oldDir, oldName);
+
+- if (cache)
+- cache->object = NULL;
+- }
+-}
++ if (obj && obj->renameAllowed) {
+
+-/* Invalidate all the cache pages associated with this object
+- * Do this whenever ther file is deleted or resized.
+- */
+-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
+-{
+- int i;
+- yaffs_Device *dev = in->myDev;
++ /* Now do the handling for an existing target, if there is one */
+
+- if (dev->nShortOpCaches > 0) {
+- /* Invalidate it. */
+- for (i = 0; i < dev->nShortOpCaches; i++) {
+- if (dev->srCache[i].object == in)
+- dev->srCache[i].object = NULL;
++ existingTarget = yaffs_FindObjectByName(newDir, newName);
++ if (existingTarget &&
++ existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
++ !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
++ /* There is a target that is a non-empty directory, so we fail */
++ return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
++ } else if (existingTarget && existingTarget != obj) {
++ /* Nuke the target first, using shadowing,
++ * but only if it isn't the same object.
++ *
++ * Note we must disable gc otherwise it can mess up the shadowing.
++ *
++ */
++ dev->gcDisable=1;
++ yaffs_ChangeObjectName(obj, newDir, newName, force,
++ existingTarget->objectId);
++ existingTarget->isShadowed = 1;
++ yaffs_UnlinkObject(existingTarget);
++ dev->gcDisable=0;
+ }
++
++ result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
++
++ yaffs_UpdateParent(oldDir);
++ if(newDir != oldDir)
++ yaffs_UpdateParent(newDir);
++
++ return result;
+ }
++ return YAFFS_FAIL;
+ }
+
+-/*--------------------- Checkpointing --------------------*/
+-
++/*------------------------- Block Management and Page Allocation ----------------*/
+
+-static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
++static int yaffs_InitialiseBlocks(yaffs_Device *dev)
+ {
+- yaffs_CheckpointValidity cp;
++ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+
+- memset(&cp, 0, sizeof(cp));
++ dev->blockInfo = NULL;
++ dev->chunkBits = NULL;
+
+- cp.structType = sizeof(cp);
+- cp.magic = YAFFS_MAGIC;
+- cp.version = YAFFS_CHECKPOINT_VERSION;
+- cp.head = (head) ? 1 : 0;
++ dev->allocationBlock = -1; /* force it to get a new one */
+
+- return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
+- 1 : 0;
+-}
++ /* If the first allocation strategy fails, thry the alternate one */
++ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
++ if (!dev->blockInfo) {
++ dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
++ dev->blockInfoAlt = 1;
++ } else
++ dev->blockInfoAlt = 0;
+
+-static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
+-{
+- yaffs_CheckpointValidity cp;
+- int ok;
++ if (dev->blockInfo) {
++ /* Set up dynamic blockinfo stuff. */
++ dev->chunkBitmapStride = (dev->param.nChunksPerBlock + 7) / 8; /* round up bytes */
++ dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
++ if (!dev->chunkBits) {
++ dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
++ dev->chunkBitsAlt = 1;
++ } else
++ dev->chunkBitsAlt = 0;
++ }
+
+- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
++ if (dev->blockInfo && dev->chunkBits) {
++ memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
++ memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
++ return YAFFS_OK;
++ }
+
+- if (ok)
+- ok = (cp.structType == sizeof(cp)) &&
+- (cp.magic == YAFFS_MAGIC) &&
+- (cp.version == YAFFS_CHECKPOINT_VERSION) &&
+- (cp.head == ((head) ? 1 : 0));
+- return ok ? 1 : 0;
++ return YAFFS_FAIL;
+ }
+
+-static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
+- yaffs_Device *dev)
++static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
+ {
+- cp->nErasedBlocks = dev->nErasedBlocks;
+- cp->allocationBlock = dev->allocationBlock;
+- cp->allocationPage = dev->allocationPage;
+- cp->nFreeChunks = dev->nFreeChunks;
++ if (dev->blockInfoAlt && dev->blockInfo)
++ YFREE_ALT(dev->blockInfo);
++ else if (dev->blockInfo)
++ YFREE(dev->blockInfo);
++
++ dev->blockInfoAlt = 0;
+
+- cp->nDeletedFiles = dev->nDeletedFiles;
+- cp->nUnlinkedFiles = dev->nUnlinkedFiles;
+- cp->nBackgroundDeletions = dev->nBackgroundDeletions;
+- cp->sequenceNumber = dev->sequenceNumber;
+- cp->oldestDirtySequence = dev->oldestDirtySequence;
++ dev->blockInfo = NULL;
+
++ if (dev->chunkBitsAlt && dev->chunkBits)
++ YFREE_ALT(dev->chunkBits);
++ else if (dev->chunkBits)
++ YFREE(dev->chunkBits);
++ dev->chunkBitsAlt = 0;
++ dev->chunkBits = NULL;
+ }
+
+-static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
+- yaffs_CheckpointDevice *cp)
++void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
+ {
+- dev->nErasedBlocks = cp->nErasedBlocks;
+- dev->allocationBlock = cp->allocationBlock;
+- dev->allocationPage = cp->allocationPage;
+- dev->nFreeChunks = cp->nFreeChunks;
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
+
+- dev->nDeletedFiles = cp->nDeletedFiles;
+- dev->nUnlinkedFiles = cp->nUnlinkedFiles;
+- dev->nBackgroundDeletions = cp->nBackgroundDeletions;
+- dev->sequenceNumber = cp->sequenceNumber;
+- dev->oldestDirtySequence = cp->oldestDirtySequence;
+-}
++ int erasedOk = 0;
+
++ /* If the block is still healthy erase it and mark as clean.
++ * If the block has had a data failure, then retire it.
++ */
+
+-static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
+-{
+- yaffs_CheckpointDevice cp;
+- __u32 nBytes;
+- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
++ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
++ (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
++ blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
+
+- int ok;
++ yaffs2_ClearOldestDirtySequence(dev,bi);
+
+- /* Write device runtime values*/
+- yaffs_DeviceToCheckpointDevice(&cp, dev);
+- cp.structType = sizeof(cp);
++ bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
+
+- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++ /* If this is the block being garbage collected then stop gc'ing this block */
++ if(blockNo == dev->gcBlock)
++ dev->gcBlock = 0;
++
++ /* If this block is currently the best candidate for gc then drop as a candidate */
++ if(blockNo == dev->gcDirtiest){
++ dev->gcDirtiest = 0;
++ dev->gcPagesInUse = 0;
++ }
+
+- /* Write block info */
+- if (ok) {
+- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
+- ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
++ if (!bi->needsRetiring) {
++ yaffs2_InvalidateCheckpoint(dev);
++ erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
++ if (!erasedOk) {
++ dev->nErasureFailures++;
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
++ }
+ }
+
+- /* Write chunk bits */
+- if (ok) {
+- nBytes = nBlocks * dev->chunkBitmapStride;
+- ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
++ if (erasedOk &&
++ ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
++ int i;
++ for (i = 0; i < dev->param.nChunksPerBlock; i++) {
++ if (!yaffs_CheckChunkErased
++ (dev, blockNo * dev->param.nChunksPerBlock + i)) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ (">>Block %d erasure supposedly OK, but chunk %d not erased"
++ TENDSTR), blockNo, i));
++ }
++ }
+ }
+- return ok ? 1 : 0;
+
++ if (erasedOk) {
++ /* Clean it up... */
++ bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
++ bi->sequenceNumber = 0;
++ dev->nErasedBlocks++;
++ bi->pagesInUse = 0;
++ bi->softDeletions = 0;
++ bi->hasShrinkHeader = 0;
++ bi->skipErasedCheck = 1; /* This is clean, so no need to check */
++ bi->gcPrioritise = 0;
++ yaffs_ClearChunkBits(dev, blockNo);
++
++ T(YAFFS_TRACE_ERASE,
++ (TSTR("Erased block %d" TENDSTR), blockNo));
++ } else {
++ dev->nFreeChunks -= dev->param.nChunksPerBlock; /* We lost a block of free space */
++
++ yaffs_RetireBlock(dev, blockNo);
++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("**>> Block %d retired" TENDSTR), blockNo));
++ }
+ }
+
+-static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
++static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
+ {
+- yaffs_CheckpointDevice cp;
+- __u32 nBytes;
+- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
+-
+- int ok;
++ int i;
+
+- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+- if (!ok)
+- return 0;
++ yaffs_BlockInfo *bi;
+
+- if (cp.structType != sizeof(cp))
+- return 0;
++ if (dev->nErasedBlocks < 1) {
++ /* Hoosterman we've got a problem.
++ * Can't get space to gc
++ */
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
+
++ return -1;
++ }
+
+- yaffs_CheckpointDeviceToDevice(dev, &cp);
++ /* Find an empty block. */
+
+- nBytes = nBlocks * sizeof(yaffs_BlockInfo);
++ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
++ dev->allocationBlockFinder++;
++ if (dev->allocationBlockFinder < dev->internalStartBlock
++ || dev->allocationBlockFinder > dev->internalEndBlock) {
++ dev->allocationBlockFinder = dev->internalStartBlock;
++ }
+
+- ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
++ bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
+
+- if (!ok)
+- return 0;
+- nBytes = nBlocks * dev->chunkBitmapStride;
++ if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
++ bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
++ dev->sequenceNumber++;
++ bi->sequenceNumber = dev->sequenceNumber;
++ dev->nErasedBlocks--;
++ T(YAFFS_TRACE_ALLOCATE,
++ (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
++ dev->allocationBlockFinder, dev->sequenceNumber,
++ dev->nErasedBlocks));
++ return dev->allocationBlockFinder;
++ }
++ }
+
+- ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR
++ ("yaffs tragedy: no more erased blocks, but there should have been %d"
++ TENDSTR), dev->nErasedBlocks));
+
+- return ok ? 1 : 0;
++ return -1;
+ }
+
+-static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
+- yaffs_Object *obj)
++
++/*
++ * Check if there's space to allocate...
++ * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
++ */
++int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks)
+ {
++ int reservedChunks;
++ int reservedBlocks = dev->param.nReservedBlocks;
++ int checkpointBlocks;
+
+- cp->objectId = obj->objectId;
+- cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
+- cp->hdrChunk = obj->hdrChunk;
+- cp->variantType = obj->variantType;
+- cp->deleted = obj->deleted;
+- cp->softDeleted = obj->softDeleted;
+- cp->unlinked = obj->unlinked;
+- cp->fake = obj->fake;
+- cp->renameAllowed = obj->renameAllowed;
+- cp->unlinkAllowed = obj->unlinkAllowed;
+- cp->serial = obj->serial;
+- cp->nDataChunks = obj->nDataChunks;
++ checkpointBlocks = yaffs2_CalcCheckpointBlocksRequired(dev);
+
+- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+- cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
+- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+- cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
++ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.nChunksPerBlock);
++
++ return (dev->nFreeChunks > (reservedChunks + nChunks));
+ }
+
+-static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
++static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
++ yaffs_BlockInfo **blockUsedPtr)
+ {
++ int retVal;
++ yaffs_BlockInfo *bi;
+
+- yaffs_Object *parent;
++ if (dev->allocationBlock < 0) {
++ /* Get next block to allocate off */
++ dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
++ dev->allocationPage = 0;
++ }
+
+- if (obj->variantType != cp->variantType) {
+- T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
+- TCONT("chunk %d does not match existing object type %d")
+- TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
+- obj->variantType));
+- return 0;
++ if (!useReserve && !yaffs_CheckSpaceForAllocation(dev, 1)) {
++ /* Not enough space to allocate unless we're allowed to use the reserve. */
++ return -1;
+ }
+
+- obj->objectId = cp->objectId;
++ if (dev->nErasedBlocks < dev->param.nReservedBlocks
++ && dev->allocationPage == 0) {
++ T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
++ }
+
+- if (cp->parentId)
+- parent = yaffs_FindOrCreateObjectByNumber(
+- obj->myDev,
+- cp->parentId,
+- YAFFS_OBJECT_TYPE_DIRECTORY);
+- else
+- parent = NULL;
++ /* Next page please.... */
++ if (dev->allocationBlock >= 0) {
++ bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
+
+- if (parent) {
+- if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
+- TCONT(" chunk %d Parent type, %d, not directory")
+- TENDSTR),
+- cp->objectId, cp->parentId, cp->variantType,
+- cp->hdrChunk, parent->variantType));
+- return 0;
+- }
+- yaffs_AddObjectToDirectory(parent, obj);
+- }
++ retVal = (dev->allocationBlock * dev->param.nChunksPerBlock) +
++ dev->allocationPage;
++ bi->pagesInUse++;
++ yaffs_SetChunkBit(dev, dev->allocationBlock,
++ dev->allocationPage);
+
+- obj->hdrChunk = cp->hdrChunk;
+- obj->variantType = cp->variantType;
+- obj->deleted = cp->deleted;
+- obj->softDeleted = cp->softDeleted;
+- obj->unlinked = cp->unlinked;
+- obj->fake = cp->fake;
+- obj->renameAllowed = cp->renameAllowed;
+- obj->unlinkAllowed = cp->unlinkAllowed;
+- obj->serial = cp->serial;
+- obj->nDataChunks = cp->nDataChunks;
++ dev->allocationPage++;
+
+- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+- obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
+- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
+- obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
++ dev->nFreeChunks--;
+
+- if (obj->hdrChunk > 0)
+- obj->lazyLoaded = 1;
+- return 1;
+-}
++ /* If the block is full set the state to full */
++ if (dev->allocationPage >= dev->param.nChunksPerBlock) {
++ bi->blockState = YAFFS_BLOCK_STATE_FULL;
++ dev->allocationBlock = -1;
++ }
+
++ if (blockUsedPtr)
++ *blockUsedPtr = bi;
+
++ return retVal;
++ }
+
+-static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
+- __u32 level, int chunkOffset)
+-{
+- int i;
+- yaffs_Device *dev = in->myDev;
+- int ok = 1;
+- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
+
+- if (tnodeSize < sizeof(yaffs_Tnode))
+- tnodeSize = sizeof(yaffs_Tnode);
++ return -1;
++}
+
++static int yaffs_GetErasedChunks(yaffs_Device *dev)
++{
++ int n;
+
+- if (tn) {
+- if (level > 0) {
++ n = dev->nErasedBlocks * dev->param.nChunksPerBlock;
+
+- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
+- if (tn->internal[i]) {
+- ok = yaffs_CheckpointTnodeWorker(in,
+- tn->internal[i],
+- level - 1,
+- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
+- }
+- }
+- } else if (level == 0) {
+- __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
+- ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
+- if (ok)
+- ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
+- }
+- }
++ if (dev->allocationBlock > 0)
++ n += (dev->param.nChunksPerBlock - dev->allocationPage);
+
+- return ok;
++ return n;
+
+ }
+
+-static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
++/*
++ * yaffs_SkipRestOfBlock() skips over the rest of the allocation block
++ * if we don't want to write to it.
++ */
++void yaffs_SkipRestOfBlock(yaffs_Device *dev)
+ {
+- __u32 endMarker = ~0;
+- int ok = 1;
+-
+- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+- ok = yaffs_CheckpointTnodeWorker(obj,
+- obj->variant.fileVariant.top,
+- obj->variant.fileVariant.topLevel,
+- 0);
+- if (ok)
+- ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
+- sizeof(endMarker));
++ if(dev->allocationBlock > 0){
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
++ if(bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING){
++ bi->blockState = YAFFS_BLOCK_STATE_FULL;
++ dev->allocationBlock = -1;
++ }
+ }
+-
+- return ok ? 1 : 0;
+ }
+
+-static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
+-{
+- __u32 baseChunk;
+- int ok = 1;
+- yaffs_Device *dev = obj->myDev;
+- yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
+- yaffs_Tnode *tn;
+- int nread = 0;
+- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
+
+- if (tnodeSize < sizeof(yaffs_Tnode))
+- tnodeSize = sizeof(yaffs_Tnode);
++static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
++ int wholeBlock)
++{
++ int oldChunk;
++ int newChunk;
++ int markNAND;
++ int retVal = YAFFS_OK;
++ int i;
++ int isCheckpointBlock;
++ int matchingChunk;
++ int maxCopies;
+
+- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++ int chunksBefore = yaffs_GetErasedChunks(dev);
++ int chunksAfter;
+
+- while (ok && (~baseChunk)) {
+- nread++;
+- /* Read level 0 tnode */
++ yaffs_ExtendedTags tags;
+
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
+
+- tn = yaffs_GetTnodeRaw(dev);
+- if (tn)
+- ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
+- else
+- ok = 0;
++ yaffs_Object *object;
+
+- if (tn && ok)
+- ok = yaffs_AddOrFindLevel0Tnode(dev,
+- fileStructPtr,
+- baseChunk,
+- tn) ? 1 : 0;
++ isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
+
+- if (ok)
+- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+
+- }
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
++ block,
++ bi->pagesInUse,
++ bi->hasShrinkHeader,
++ wholeBlock));
+
+- T(YAFFS_TRACE_CHECKPOINT, (
+- TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
+- nread, baseChunk, ok));
++ /*yaffs_VerifyFreeChunks(dev); */
+
+- return ok ? 1 : 0;
+-}
++ if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
++ bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
++
++ bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
+
++ dev->gcDisable = 1;
+
+-static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
+-{
+- yaffs_Object *obj;
+- yaffs_CheckpointObject cp;
+- int i;
+- int ok = 1;
+- struct ylist_head *lh;
++ if (isCheckpointBlock ||
++ !yaffs_StillSomeChunkBits(dev, block)) {
++ T(YAFFS_TRACE_TRACING,
++ (TSTR
++ ("Collecting block %d that has no chunks in use" TENDSTR),
++ block));
++ yaffs_BlockBecameDirty(dev, block);
++ } else {
+
++ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+- /* Iterate through the objects in each hash entry,
+- * dumping them to the checkpointing stream.
+- */
++ yaffs_VerifyBlock(dev, bi, block);
+
+- for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
+- ylist_for_each(lh, &dev->objectBucket[i].list) {
+- if (lh) {
+- obj = ylist_entry(lh, yaffs_Object, hashLink);
+- if (!obj->deferedFree) {
+- yaffs_ObjectToCheckpointObject(&cp, obj);
+- cp.structType = sizeof(cp);
+-
+- T(YAFFS_TRACE_CHECKPOINT, (
+- TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
+- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
++ maxCopies = (wholeBlock) ? dev->param.nChunksPerBlock : 5;
++ oldChunk = block * dev->param.nChunksPerBlock + dev->gcChunk;
+
+- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++ for (/* init already done */;
++ retVal == YAFFS_OK &&
++ dev->gcChunk < dev->param.nChunksPerBlock &&
++ (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
++ maxCopies > 0;
++ dev->gcChunk++, oldChunk++) {
++ if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
+
+- if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+- ok = yaffs_WriteCheckpointTnodes(obj);
+- }
+- }
+- }
+- }
++ /* This page is in use and might need to be copied off */
+
+- /* Dump end of list */
+- memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
+- cp.structType = sizeof(cp);
++ maxCopies--;
+
+- if (ok)
+- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++ markNAND = 1;
+
+- return ok ? 1 : 0;
+-}
++ yaffs_InitialiseTags(&tags);
+
+-static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
+-{
+- yaffs_Object *obj;
+- yaffs_CheckpointObject cp;
+- int ok = 1;
+- int done = 0;
+- yaffs_Object *hardList = NULL;
++ yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
++ buffer, &tags);
+
+- while (ok && !done) {
+- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
+- if (cp.structType != sizeof(cp)) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
+- cp.structType, sizeof(cp), ok));
+- ok = 0;
+- }
+-
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
+- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
+-
+- if (ok && cp.objectId == ~0)
+- done = 1;
+- else if (ok) {
+- obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
+- if (obj) {
+- ok = yaffs_CheckpointObjectToObject(obj, &cp);
+- if (!ok)
+- break;
+- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
+- ok = yaffs_ReadCheckpointTnodes(obj);
+- } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+- obj->hardLinks.next =
+- (struct ylist_head *) hardList;
+- hardList = obj;
+- }
+- } else
+- ok = 0;
+- }
+- }
++ object =
++ yaffs_FindObjectByNumber(dev,
++ tags.objectId);
+
+- if (ok)
+- yaffs_HardlinkFixup(dev, hardList);
++ T(YAFFS_TRACE_GC_DETAIL,
++ (TSTR
++ ("Collecting chunk in block %d, %d %d %d " TENDSTR),
++ dev->gcChunk, tags.objectId, tags.chunkId,
++ tags.byteCount));
+
+- return ok ? 1 : 0;
+-}
++ if (object && !yaffs_SkipVerification(dev)) {
++ if (tags.chunkId == 0)
++ matchingChunk = object->hdrChunk;
++ else if (object->softDeleted)
++ matchingChunk = oldChunk; /* Defeat the test */
++ else
++ matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
+
+-static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
+-{
+- __u32 checkpointSum;
+- int ok;
++ if (oldChunk != matchingChunk)
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
++ oldChunk, matchingChunk, tags.objectId, tags.chunkId));
+
+- yaffs_GetCheckpointSum(dev, &checkpointSum);
++ }
+
+- ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
++ if (!object) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("page %d in gc has no object: %d %d %d "
++ TENDSTR), oldChunk,
++ tags.objectId, tags.chunkId, tags.byteCount));
++ }
+
+- if (!ok)
+- return 0;
++ if (object &&
++ object->deleted &&
++ object->softDeleted &&
++ tags.chunkId != 0) {
++ /* Data chunk in a soft deleted file, throw it away
++ * It's a soft deleted data chunk,
++ * No need to copy this, just forget about it and
++ * fix up the object.
++ */
++
++ /* Free chunks already includes softdeleted chunks.
++ * How ever this chunk is going to soon be really deleted
++ * which will increment free chunks.
++ * We have to decrement free chunks so this works out properly.
++ */
++ dev->nFreeChunks--;
++ bi->softDeletions--;
+
+- return 1;
+-}
++ object->nDataChunks--;
+
+-static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
+-{
+- __u32 checkpointSum0;
+- __u32 checkpointSum1;
+- int ok;
++ if (object->nDataChunks <= 0) {
++ /* remeber to clean up the object */
++ dev->gcCleanupList[dev->nCleanups] =
++ tags.objectId;
++ dev->nCleanups++;
++ }
++ markNAND = 0;
++ } else if (0) {
++ /* Todo object && object->deleted && object->nDataChunks == 0 */
++ /* Deleted object header with no data chunks.
++ * Can be discarded and the file deleted.
++ */
++ object->hdrChunk = 0;
++ yaffs_FreeTnode(object->myDev,
++ object->variant.
++ fileVariant.top);
++ object->variant.fileVariant.top = NULL;
++ yaffs_DoGenericObjectDeletion(object);
+
+- yaffs_GetCheckpointSum(dev, &checkpointSum0);
++ } else if (object) {
++ /* It's either a data chunk in a live file or
++ * an ObjectHeader, so we're interested in it.
++ * NB Need to keep the ObjectHeaders of deleted files
++ * until the whole file has been deleted off
++ */
++ tags.serialNumber++;
+
+- ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
++ dev->nGCCopies++;
+
+- if (!ok)
+- return 0;
++ if (tags.chunkId == 0) {
++ /* It is an object Id,
++ * We need to nuke the shrinkheader flags first
++ * Also need to clean up shadowing.
++ * We no longer want the shrinkHeader flag since its work is done
++ * and if it is left in place it will mess up scanning.
++ */
+
+- if (checkpointSum0 != checkpointSum1)
+- return 0;
++ yaffs_ObjectHeader *oh;
++ oh = (yaffs_ObjectHeader *)buffer;
+
+- return 1;
+-}
++ oh->isShrink = 0;
++ tags.extraIsShrinkHeader = 0;
+
++ oh->shadowsObject = 0;
++ oh->inbandShadowsObject = 0;
++ tags.extraShadows = 0;
++
++ /* Update file size */
++ if(object->variantType == YAFFS_OBJECT_TYPE_FILE){
++ oh->fileSize = object->variant.fileVariant.fileSize;
++ tags.extraFileLength = oh->fileSize;
++ }
+
+-static int yaffs_WriteCheckpointData(yaffs_Device *dev)
+-{
+- int ok = 1;
++ yaffs_VerifyObjectHeader(object, oh, &tags, 1);
++ newChunk =
++ yaffs_WriteNewChunkWithTagsToNAND(dev,(__u8 *) oh, &tags, 1);
++ } else
++ newChunk =
++ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
+
+- if (dev->skipCheckpointWrite || !dev->isYaffs2) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
+- ok = 0;
+- }
++ if (newChunk < 0) {
++ retVal = YAFFS_FAIL;
++ } else {
+
+- if (ok)
+- ok = yaffs_CheckpointOpen(dev, 1);
++ /* Ok, now fix up the Tnodes etc. */
+
+- if (ok) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+- ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
+- }
+- if (ok) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
+- ok = yaffs_WriteCheckpointDevice(dev);
+- }
+- if (ok) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
+- ok = yaffs_WriteCheckpointObjects(dev);
+- }
+- if (ok) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
+- ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
+- }
++ if (tags.chunkId == 0) {
++ /* It's a header */
++ object->hdrChunk = newChunk;
++ object->serial = tags.serialNumber;
++ } else {
++ /* It's a data chunk */
++ int ok;
++ ok = yaffs_PutChunkIntoFile
++ (object,
++ tags.chunkId,
++ newChunk, 0);
++ }
++ }
++ }
+
+- if (ok)
+- ok = yaffs_WriteCheckpointSum(dev);
++ if (retVal == YAFFS_OK)
++ yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
+
+- if (!yaffs_CheckpointClose(dev))
+- ok = 0;
++ }
++ }
+
+- if (ok)
+- dev->isCheckpointed = 1;
+- else
+- dev->isCheckpointed = 0;
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
+
+- return dev->isCheckpointed;
+-}
+
+-static int yaffs_ReadCheckpointData(yaffs_Device *dev)
+-{
+- int ok = 1;
+
+- if (dev->skipCheckpointRead || !dev->isYaffs2) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
+- ok = 0;
+ }
+
+- if (ok)
+- ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
+-
+- if (ok) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
+- ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
+- }
+- if (ok) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
+- ok = yaffs_ReadCheckpointDevice(dev);
+- }
+- if (ok) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
+- ok = yaffs_ReadCheckpointObjects(dev);
+- }
+- if (ok) {
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
+- ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
+- }
++ yaffs_VerifyCollectedBlock(dev, bi, block);
+
+- if (ok) {
+- ok = yaffs_ReadCheckpointSum(dev);
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
+- }
+
+- if (!yaffs_CheckpointClose(dev))
+- ok = 0;
+
+- if (ok)
+- dev->isCheckpointed = 1;
+- else
+- dev->isCheckpointed = 0;
++ if (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
++ /*
++ * The gc did not complete. Set block state back to FULL
++ * because checkpointing does not restore gc.
++ */
++ bi->blockState = YAFFS_BLOCK_STATE_FULL;
++ } else {
++ /* The gc completed. */
++ /* Do any required cleanups */
++ for (i = 0; i < dev->nCleanups; i++) {
++ /* Time to delete the file too */
++ object =
++ yaffs_FindObjectByNumber(dev,
++ dev->gcCleanupList[i]);
++ if (object) {
++ yaffs_FreeTnode(dev,
++ object->variant.fileVariant.
++ top);
++ object->variant.fileVariant.top = NULL;
++ T(YAFFS_TRACE_GC,
++ (TSTR
++ ("yaffs: About to finally delete object %d"
++ TENDSTR), object->objectId));
++ yaffs_DoGenericObjectDeletion(object);
++ object->myDev->nDeletedFiles--;
++ }
+
+- return ok ? 1 : 0;
++ }
+
+-}
+
+-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
+-{
+- if (dev->isCheckpointed ||
+- dev->blocksInCheckpoint > 0) {
+- dev->isCheckpointed = 0;
+- yaffs_CheckpointInvalidateStream(dev);
+- if (dev->superBlock && dev->markSuperBlockDirty)
+- dev->markSuperBlockDirty(dev->superBlock);
++ chunksAfter = yaffs_GetErasedChunks(dev);
++ if (chunksBefore >= chunksAfter) {
++ T(YAFFS_TRACE_GC,
++ (TSTR
++ ("gc did not increase free chunks before %d after %d"
++ TENDSTR), chunksBefore, chunksAfter));
++ }
++ dev->gcBlock = 0;
++ dev->gcChunk = 0;
++ dev->nCleanups = 0;
+ }
+-}
+
++ dev->gcDisable = 0;
+
+-int yaffs_CheckpointSave(yaffs_Device *dev)
+-{
+-
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++ return retVal;
++}
+
+- yaffs_VerifyObjects(dev);
+- yaffs_VerifyBlocks(dev);
+- yaffs_VerifyFreeChunks(dev);
++/*
++ * FindBlockForgarbageCollection is used to select the dirtiest block (or close enough)
++ * for garbage collection.
++ */
+
+- if (!dev->isCheckpointed) {
+- yaffs_InvalidateCheckpoint(dev);
+- yaffs_WriteCheckpointData(dev);
+- }
++static unsigned yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
++ int aggressive,
++ int background)
++{
++ int i;
++ int iterations;
++ unsigned selected = 0;
++ int prioritised = 0;
++ int prioritisedExists = 0;
++ yaffs_BlockInfo *bi;
++ int threshold;
+
+- T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++ /* First let's see if we need to grab a prioritised block */
++ if (dev->hasPendingPrioritisedGCs && !aggressive) {
++ dev->gcDirtiest = 0;
++ bi = dev->blockInfo;
++ for (i = dev->internalStartBlock;
++ i <= dev->internalEndBlock && !selected;
++ i++) {
+
+- return dev->isCheckpointed;
+-}
++ if (bi->gcPrioritise) {
++ prioritisedExists = 1;
++ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
++ yaffs2_BlockNotDisqualifiedFromGC(dev, bi)) {
++ selected = i;
++ prioritised = 1;
++ }
++ }
++ bi++;
++ }
+
+-int yaffs_CheckpointRestore(yaffs_Device *dev)
+-{
+- int retval;
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++ /*
++ * If there is a prioritised block and none was selected then
++ * this happened because there is at least one old dirty block gumming
++ * up the works. Let's gc the oldest dirty block.
++ */
+
+- retval = yaffs_ReadCheckpointData(dev);
++ if(prioritisedExists &&
++ !selected &&
++ dev->oldestDirtyBlock > 0)
++ selected = dev->oldestDirtyBlock;
+
+- if (dev->isCheckpointed) {
+- yaffs_VerifyObjects(dev);
+- yaffs_VerifyBlocks(dev);
+- yaffs_VerifyFreeChunks(dev);
++ if (!prioritisedExists) /* None found, so we can clear this */
++ dev->hasPendingPrioritisedGCs = 0;
+ }
+
+- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++ /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
++ * search harder.
++ * else (we're doing a leasurely gc), then we only bother to do this if the
++ * block has only a few pages in use.
++ */
+
+- return retval;
+-}
++ if (!selected){
++ int pagesUsed;
++ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
++ if (aggressive){
++ threshold = dev->param.nChunksPerBlock;
++ iterations = nBlocks;
++ } else {
++ int maxThreshold;
+
+-/*--------------------- File read/write ------------------------
+- * Read and write have very similar structures.
+- * In general the read/write has three parts to it
+- * An incomplete chunk to start with (if the read/write is not chunk-aligned)
+- * Some complete chunks
+- * An incomplete chunk to end off with
+- *
+- * Curve-balls: the first chunk might also be the last chunk.
+- */
++ if(background)
++ maxThreshold = dev->param.nChunksPerBlock/2;
++ else
++ maxThreshold = dev->param.nChunksPerBlock/8;
+
+-int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
+- int nBytes)
+-{
++ if(maxThreshold < YAFFS_GC_PASSIVE_THRESHOLD)
++ maxThreshold = YAFFS_GC_PASSIVE_THRESHOLD;
+
+- int chunk;
+- __u32 start;
+- int nToCopy;
+- int n = nBytes;
+- int nDone = 0;
+- yaffs_ChunkCache *cache;
++ threshold = background ?
++ (dev->gcNotDone + 2) * 2 : 0;
++ if(threshold <YAFFS_GC_PASSIVE_THRESHOLD)
++ threshold = YAFFS_GC_PASSIVE_THRESHOLD;
++ if(threshold > maxThreshold)
++ threshold = maxThreshold;
+
+- yaffs_Device *dev;
++ iterations = nBlocks / 16 + 1;
++ if (iterations > 100)
++ iterations = 100;
++ }
+
+- dev = in->myDev;
++ for (i = 0;
++ i < iterations &&
++ (dev->gcDirtiest < 1 ||
++ dev->gcPagesInUse > YAFFS_GC_GOOD_ENOUGH);
++ i++) {
++ dev->gcBlockFinder++;
++ if (dev->gcBlockFinder < dev->internalStartBlock ||
++ dev->gcBlockFinder > dev->internalEndBlock)
++ dev->gcBlockFinder = dev->internalStartBlock;
+
+- while (n > 0) {
+- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
+- /* start = offset % dev->nDataBytesPerChunk; */
+- yaffs_AddrToChunk(dev, offset, &chunk, &start);
+- chunk++;
++ bi = yaffs_GetBlockInfo(dev, dev->gcBlockFinder);
+
+- /* OK now check for the curveball where the start and end are in
+- * the same chunk.
+- */
+- if ((start + n) < dev->nDataBytesPerChunk)
+- nToCopy = n;
+- else
+- nToCopy = dev->nDataBytesPerChunk - start;
++ pagesUsed = bi->pagesInUse - bi->softDeletions;
+
+- cache = yaffs_FindChunkCache(in, chunk);
++ if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
++ pagesUsed < dev->param.nChunksPerBlock &&
++ (dev->gcDirtiest < 1 || pagesUsed < dev->gcPagesInUse) &&
++ yaffs2_BlockNotDisqualifiedFromGC(dev, bi)) {
++ dev->gcDirtiest = dev->gcBlockFinder;
++ dev->gcPagesInUse = pagesUsed;
++ }
++ }
+
+- /* If the chunk is already in the cache or it is less than a whole chunk
+- * or we're using inband tags then use the cache (if there is caching)
+- * else bypass the cache.
+- */
+- if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
+- if (dev->nShortOpCaches > 0) {
++ if(dev->gcDirtiest > 0 && dev->gcPagesInUse <= threshold)
++ selected = dev->gcDirtiest;
++ }
++
++ /*
++ * If nothing has been selected for a while, try selecting the oldest dirty
++ * because that's gumming up the works.
++ */
+
+- /* If we can't find the data in the cache, then load it up. */
++ if(!selected && dev->param.isYaffs2 &&
++ dev->gcNotDone >= ( background ? 10 : 20)){
++ yaffs2_FindOldestDirtySequence(dev);
++ if(dev->oldestDirtyBlock > 0) {
++ selected = dev->oldestDirtyBlock;
++ dev->gcDirtiest = selected;
++ dev->oldestDirtyGCs++;
++ bi = yaffs_GetBlockInfo(dev, selected);
++ dev->gcPagesInUse = bi->pagesInUse - bi->softDeletions;
++ } else
++ dev->gcNotDone = 0;
++ }
+
+- if (!cache) {
+- cache = yaffs_GrabChunkCache(in->myDev);
+- cache->object = in;
+- cache->chunkId = chunk;
+- cache->dirty = 0;
+- cache->locked = 0;
+- yaffs_ReadChunkDataFromObject(in, chunk,
+- cache->
+- data);
+- cache->nBytes = 0;
+- }
++ if(selected){
++ T(YAFFS_TRACE_GC,
++ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR),
++ selected,
++ dev->param.nChunksPerBlock - dev->gcPagesInUse,
++ prioritised));
++
++ dev->nGCBlocks++;
++ if(background)
++ dev->backgroundGCs++;
++
++ dev->gcDirtiest = 0;
++ dev->gcPagesInUse = 0;
++ dev->gcNotDone = 0;
++ if(dev->refreshSkip > 0)
++ dev->refreshSkip--;
++ } else{
++ dev->gcNotDone++;
++ T(YAFFS_TRACE_GC,
++ (TSTR("GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s" TENDSTR),
++ dev->gcBlockFinder, dev->gcNotDone,
++ threshold,
++ dev->gcDirtiest, dev->gcPagesInUse,
++ dev->oldestDirtyBlock,
++ background ? " bg" : ""));
++ }
+
+- yaffs_UseChunkCache(dev, cache, 0);
++ return selected;
++}
+
+- cache->locked = 1;
++/* New garbage collector
++ * If we're very low on erased blocks then we do aggressive garbage collection
++ * otherwise we do "leasurely" garbage collection.
++ * Aggressive gc looks further (whole array) and will accept less dirty blocks.
++ * Passive gc only inspects smaller areas and will only accept more dirty blocks.
++ *
++ * The idea is to help clear out space in a more spread-out manner.
++ * Dunno if it really does anything useful.
++ */
++static int yaffs_CheckGarbageCollection(yaffs_Device *dev, int background)
++{
++ int aggressive = 0;
++ int gcOk = YAFFS_OK;
++ int maxTries = 0;
++ int minErased;
++ int erasedChunks;
++ int checkpointBlockAdjust;
+
++ if(dev->param.gcControl &&
++ (dev->param.gcControl(dev) & 1) == 0)
++ return YAFFS_OK;
+
+- memcpy(buffer, &cache->data[start], nToCopy);
++ if (dev->gcDisable) {
++ /* Bail out so we don't get recursive gc */
++ return YAFFS_OK;
++ }
+
+- cache->locked = 0;
+- } else {
+- /* Read into the local buffer then copy..*/
++ /* This loop should pass the first time.
++ * We'll only see looping here if the collection does not increase space.
++ */
+
+- __u8 *localBuffer =
+- yaffs_GetTempBuffer(dev, __LINE__);
+- yaffs_ReadChunkDataFromObject(in, chunk,
+- localBuffer);
++ do {
++ maxTries++;
+
+- memcpy(buffer, &localBuffer[start], nToCopy);
++ checkpointBlockAdjust = yaffs2_CalcCheckpointBlocksRequired(dev);
+
++ minErased = dev->param.nReservedBlocks + checkpointBlockAdjust + 1;
++ erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
+
+- yaffs_ReleaseTempBuffer(dev, localBuffer,
+- __LINE__);
++ /* If we need a block soon then do aggressive gc.*/
++ if (dev->nErasedBlocks < minErased)
++ aggressive = 1;
++ else {
++ if(!background && erasedChunks > (dev->nFreeChunks / 4))
++ break;
++
++ if(dev->gcSkip > 20)
++ dev->gcSkip = 20;
++ if(erasedChunks < dev->nFreeChunks/2 ||
++ dev->gcSkip < 1 ||
++ background)
++ aggressive = 0;
++ else {
++ dev->gcSkip--;
++ break;
+ }
++ }
+
+- } else {
++ dev->gcSkip = 5;
+
+- /* A full chunk. Read directly into the supplied buffer. */
+- yaffs_ReadChunkDataFromObject(in, chunk, buffer);
++ /* If we don't already have a block being gc'd then see if we should start another */
+
++ if (dev->gcBlock < 1 && !aggressive) {
++ dev->gcBlock = yaffs2_FindRefreshBlock(dev);
++ dev->gcChunk = 0;
++ dev->nCleanups=0;
++ }
++ if (dev->gcBlock < 1) {
++ dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive, background);
++ dev->gcChunk = 0;
++ dev->nCleanups=0;
+ }
+
+- n -= nToCopy;
+- offset += nToCopy;
+- buffer += nToCopy;
+- nDone += nToCopy;
++ if (dev->gcBlock > 0) {
++ dev->allGCs++;
++ if (!aggressive)
++ dev->passiveGCs++;
+
+- }
++ T(YAFFS_TRACE_GC,
++ (TSTR
++ ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
++ dev->nErasedBlocks, aggressive));
+
+- return nDone;
++ gcOk = yaffs_GarbageCollectBlock(dev, dev->gcBlock, aggressive);
++ }
++
++ if (dev->nErasedBlocks < (dev->param.nReservedBlocks) && dev->gcBlock > 0) {
++ T(YAFFS_TRACE_GC,
++ (TSTR
++ ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
++ TENDSTR), dev->nErasedBlocks, maxTries, dev->gcBlock));
++ }
++ } while ((dev->nErasedBlocks < dev->param.nReservedBlocks) &&
++ (dev->gcBlock > 0) &&
++ (maxTries < 2));
++
++ return aggressive ? gcOk : YAFFS_OK;
+ }
+
+-int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
+- int nBytes, int writeThrough)
++/*
++ * yaffs_BackgroundGarbageCollect()
++ * Garbage collects. Intended to be called from a background thread.
++ * Returns non-zero if at least half the free chunks are erased.
++ */
++int yaffs_BackgroundGarbageCollect(yaffs_Device *dev, unsigned urgency)
+ {
++ int erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
+
+- int chunk;
+- __u32 start;
+- int nToCopy;
+- int n = nBytes;
+- int nDone = 0;
+- int nToWriteBack;
+- int startOfWrite = offset;
+- int chunkWritten = 0;
+- __u32 nBytesRead;
+- __u32 chunkStart;
++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR),urgency));
+
+- yaffs_Device *dev;
++ yaffs_CheckGarbageCollection(dev, 1);
++ return erasedChunks > dev->nFreeChunks/2;
++}
+
+- dev = in->myDev;
++/*------------------------- TAGS --------------------------------*/
+
+- while (n > 0 && chunkWritten >= 0) {
+- /* chunk = offset / dev->nDataBytesPerChunk + 1; */
+- /* start = offset % dev->nDataBytesPerChunk; */
+- yaffs_AddrToChunk(dev, offset, &chunk, &start);
++static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
++ int chunkInObject)
++{
++ return (tags->chunkId == chunkInObject &&
++ tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
+
+- if (chunk * dev->nDataBytesPerChunk + start != offset ||
+- start >= dev->nDataBytesPerChunk) {
+- T(YAFFS_TRACE_ERROR, (
+- TSTR("AddrToChunk of offset %d gives chunk %d start %d"
+- TENDSTR),
+- (int)offset, chunk, start));
+- }
+- chunk++;
++}
+
+- /* OK now check for the curveball where the start and end are in
+- * the same chunk.
+- */
+
+- if ((start + n) < dev->nDataBytesPerChunk) {
+- nToCopy = n;
++/*-------------------- Data file manipulation -----------------*/
+
+- /* Now folks, to calculate how many bytes to write back....
+- * If we're overwriting and not writing to then end of file then
+- * we need to write back as much as was there before.
+- */
++static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
++ yaffs_ExtendedTags *tags)
++{
++ /*Get the Tnode, then get the level 0 offset chunk offset */
++ yaffs_Tnode *tn;
++ int theChunk = -1;
++ yaffs_ExtendedTags localTags;
++ int retVal = -1;
+
+- chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
++ yaffs_Device *dev = in->myDev;
+
+- if (chunkStart > in->variant.fileVariant.fileSize)
+- nBytesRead = 0; /* Past end of file */
+- else
+- nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
++ if (!tags) {
++ /* Passed a NULL, so use our own tags space */
++ tags = &localTags;
++ }
+
+- if (nBytesRead > dev->nDataBytesPerChunk)
+- nBytesRead = dev->nDataBytesPerChunk;
++ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+
+- nToWriteBack =
+- (nBytesRead >
+- (start + n)) ? nBytesRead : (start + n);
++ if (tn) {
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+
+- if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
+- YBUG();
++ retVal =
++ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
++ chunkInInode);
++ }
++ return retVal;
++}
+
+- } else {
+- nToCopy = dev->nDataBytesPerChunk - start;
+- nToWriteBack = dev->nDataBytesPerChunk;
+- }
++static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
++ yaffs_ExtendedTags *tags)
++{
++ /* Get the Tnode, then get the level 0 offset chunk offset */
++ yaffs_Tnode *tn;
++ int theChunk = -1;
++ yaffs_ExtendedTags localTags;
+
+- if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
+- /* An incomplete start or end chunk (or maybe both start and end chunk),
+- * or we're using inband tags, so we want to use the cache buffers.
+- */
+- if (dev->nShortOpCaches > 0) {
+- yaffs_ChunkCache *cache;
+- /* If we can't find the data in the cache, then load the cache */
+- cache = yaffs_FindChunkCache(in, chunk);
++ yaffs_Device *dev = in->myDev;
++ int retVal = -1;
+
+- if (!cache
+- && yaffs_CheckSpaceForAllocation(in->
+- myDev)) {
+- cache = yaffs_GrabChunkCache(in->myDev);
+- cache->object = in;
+- cache->chunkId = chunk;
+- cache->dirty = 0;
+- cache->locked = 0;
+- yaffs_ReadChunkDataFromObject(in, chunk,
+- cache->
+- data);
+- } else if (cache &&
+- !cache->dirty &&
+- !yaffs_CheckSpaceForAllocation(in->myDev)) {
+- /* Drop the cache if it was a read cache item and
+- * no space check has been made for it.
+- */
+- cache = NULL;
+- }
++ if (!tags) {
++ /* Passed a NULL, so use our own tags space */
++ tags = &localTags;
++ }
+
+- if (cache) {
+- yaffs_UseChunkCache(dev, cache, 1);
+- cache->locked = 1;
++ tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
+
++ if (tn) {
+
+- memcpy(&cache->data[start], buffer,
+- nToCopy);
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+
++ retVal =
++ yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
++ chunkInInode);
+
+- cache->locked = 0;
+- cache->nBytes = nToWriteBack;
++ /* Delete the entry in the filestructure (if found) */
++ if (retVal != -1)
++ yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0);
++ }
+
+- if (writeThrough) {
+- chunkWritten =
+- yaffs_WriteChunkDataToObject
+- (cache->object,
+- cache->chunkId,
+- cache->data, cache->nBytes,
+- 1);
+- cache->dirty = 0;
+- }
++ return retVal;
++}
+
+- } else {
+- chunkWritten = -1; /* fail the write */
+- }
+- } else {
+- /* An incomplete start or end chunk (or maybe both start and end chunk)
+- * Read into the local buffer then copy, then copy over and write back.
+- */
+
+- __u8 *localBuffer =
+- yaffs_GetTempBuffer(dev, __LINE__);
++int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
++ int chunkInNAND, int inScan)
++{
++ /* NB inScan is zero unless scanning.
++ * For forward scanning, inScan is > 0;
++ * for backward scanning inScan is < 0
++ *
++ * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there.
++ */
++
++ yaffs_Tnode *tn;
++ yaffs_Device *dev = in->myDev;
++ int existingChunk;
++ yaffs_ExtendedTags existingTags;
++ yaffs_ExtendedTags newTags;
++ unsigned existingSerial, newSerial;
++
++ if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
++ /* Just ignore an attempt at putting a chunk into a non-file during scanning
++ * If it is not during Scanning then something went wrong!
++ */
++ if (!inScan) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy:attempt to put data chunk into a non-file"
++ TENDSTR)));
++ YBUG();
++ }
+
+- yaffs_ReadChunkDataFromObject(in, chunk,
+- localBuffer);
++ yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
++ return YAFFS_OK;
++ }
+
++ tn = yaffs_AddOrFindLevel0Tnode(dev,
++ &in->variant.fileVariant,
++ chunkInInode,
++ NULL);
++ if (!tn)
++ return YAFFS_FAIL;
++
++ if(!chunkInNAND)
++ /* Dummy insert, bail now */
++ return YAFFS_OK;
+
++ existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
+
+- memcpy(&localBuffer[start], buffer, nToCopy);
++ if (inScan != 0) {
++ /* If we're scanning then we need to test for duplicates
++ * NB This does not need to be efficient since it should only ever
++ * happen when the power fails during a write, then only one
++ * chunk should ever be affected.
++ *
++ * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
++ * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
++ */
+
+- chunkWritten =
+- yaffs_WriteChunkDataToObject(in, chunk,
+- localBuffer,
+- nToWriteBack,
+- 0);
++ if (existingChunk > 0) {
++ /* NB Right now existing chunk will not be real chunkId if the chunk group size > 1
++ * thus we have to do a FindChunkInFile to get the real chunk id.
++ *
++ * We have a duplicate now we need to decide which one to use:
++ *
++ * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
++ * Forward scanning YAFFS2: The new one is what we use, dump the old one.
++ * YAFFS1: Get both sets of tags and compare serial numbers.
++ */
+
+- yaffs_ReleaseTempBuffer(dev, localBuffer,
+- __LINE__);
++ if (inScan > 0) {
++ /* Only do this for forward scanning */
++ yaffs_ReadChunkWithTagsFromNAND(dev,
++ chunkInNAND,
++ NULL, &newTags);
+
++ /* Do a proper find */
++ existingChunk =
++ yaffs_FindChunkInFile(in, chunkInInode,
++ &existingTags);
+ }
+
+- } else {
+- /* A full chunk. Write directly from the supplied buffer. */
++ if (existingChunk <= 0) {
++ /*Hoosterman - how did this happen? */
+
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy: existing chunk < 0 in scan"
++ TENDSTR)));
+
++ }
+
+- chunkWritten =
+- yaffs_WriteChunkDataToObject(in, chunk, buffer,
+- dev->nDataBytesPerChunk,
+- 0);
++ /* NB The deleted flags should be false, otherwise the chunks will
++ * not be loaded during a scan
++ */
+
+- /* Since we've overwritten the cached data, we better invalidate it. */
+- yaffs_InvalidateChunkCache(in, chunk);
+- }
++ if (inScan > 0) {
++ newSerial = newTags.serialNumber;
++ existingSerial = existingTags.serialNumber;
++ }
+
+- if (chunkWritten >= 0) {
+- n -= nToCopy;
+- offset += nToCopy;
+- buffer += nToCopy;
+- nDone += nToCopy;
++ if ((inScan > 0) &&
++ (existingChunk <= 0 ||
++ ((existingSerial + 1) & 3) == newSerial)) {
++ /* Forward scanning.
++ * Use new
++ * Delete the old one and drop through to update the tnode
++ */
++ yaffs_DeleteChunk(dev, existingChunk, 1,
++ __LINE__);
++ } else {
++ /* Backward scanning or we want to use the existing one
++ * Use existing.
++ * Delete the new one and return early so that the tnode isn't changed
++ */
++ yaffs_DeleteChunk(dev, chunkInNAND, 1,
++ __LINE__);
++ return YAFFS_OK;
++ }
+ }
+
+ }
+
+- /* Update file object */
+-
+- if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
+- in->variant.fileVariant.fileSize = (startOfWrite + nDone);
++ if (existingChunk == 0)
++ in->nDataChunks++;
+
+- in->dirty = 1;
++ yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
+
+- return nDone;
++ return YAFFS_OK;
+ }
+
++static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
++ __u8 *buffer)
++{
++ int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
+
+-/* ---------------------- File resizing stuff ------------------ */
++ if (chunkInNAND >= 0)
++ return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
++ buffer, NULL);
++ else {
++ T(YAFFS_TRACE_NANDACCESS,
++ (TSTR("Chunk %d not found zero instead" TENDSTR),
++ chunkInNAND));
++ /* get sane (zero) data if you read a hole */
++ memset(buffer, 0, in->myDev->nDataBytesPerChunk);
++ return 0;
++ }
+
+-static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
+-{
++}
+
+- yaffs_Device *dev = in->myDev;
+- int oldFileSize = in->variant.fileVariant.fileSize;
++void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
++{
++ int block;
++ int page;
++ yaffs_ExtendedTags tags;
++ yaffs_BlockInfo *bi;
+
+- int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
++ if (chunkId <= 0)
++ return;
+
+- int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
+- dev->nDataBytesPerChunk;
+- int i;
+- int chunkId;
++ dev->nDeletions++;
++ block = chunkId / dev->param.nChunksPerBlock;
++ page = chunkId % dev->param.nChunksPerBlock;
+
+- /* Delete backwards so that we don't end up with holes if
+- * power is lost part-way through the operation.
+- */
+- for (i = lastDel; i >= startDel; i--) {
+- /* NB this could be optimised somewhat,
+- * eg. could retrieve the tags and write them without
+- * using yaffs_DeleteChunk
+- */
+
+- chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
+- if (chunkId > 0) {
+- if (chunkId <
+- (dev->internalStartBlock * dev->nChunksPerBlock)
+- || chunkId >=
+- ((dev->internalEndBlock +
+- 1) * dev->nChunksPerBlock)) {
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR("Found daft chunkId %d for %d" TENDSTR),
+- chunkId, i));
+- } else {
+- in->nDataChunks--;
+- yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
+- }
+- }
+- }
++ if (!yaffs_CheckChunkBit(dev, block, page))
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Deleting invalid chunk %d"TENDSTR),
++ chunkId));
+
+-}
++ bi = yaffs_GetBlockInfo(dev, block);
++
++ yaffs2_UpdateOldestDirtySequence(dev, block, bi);
+
+-int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
+-{
++ T(YAFFS_TRACE_DELETION,
++ (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
+
+- int oldFileSize = in->variant.fileVariant.fileSize;
+- __u32 newSizeOfPartialChunk;
+- int newFullChunks;
++ if (!dev->param.isYaffs2 && markNAND &&
++ bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
+
+- yaffs_Device *dev = in->myDev;
++ yaffs_InitialiseTags(&tags);
+
+- yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
++ tags.chunkDeleted = 1;
+
+- yaffs_FlushFilesChunkCache(in);
+- yaffs_InvalidateWholeChunkCache(in);
++ yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
++ yaffs_HandleUpdateChunk(dev, chunkId, &tags);
++ } else {
++ dev->nUnmarkedDeletions++;
++ }
+
+- yaffs_CheckGarbageCollection(dev);
++ /* Pull out of the management area.
++ * If the whole block became dirty, this will kick off an erasure.
++ */
++ if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
++ bi->blockState == YAFFS_BLOCK_STATE_FULL ||
++ bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++ bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
++ dev->nFreeChunks++;
+
+- if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+- return YAFFS_FAIL;
++ yaffs_ClearChunkBit(dev, block, page);
+
+- if (newSize == oldFileSize)
+- return YAFFS_OK;
++ bi->pagesInUse--;
+
+- if (newSize < oldFileSize) {
++ if (bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
++ bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++ yaffs_BlockBecameDirty(dev, block);
++ }
+
+- yaffs_PruneResizedChunks(in, newSize);
++ }
+
+- if (newSizeOfPartialChunk != 0) {
+- int lastChunk = 1 + newFullChunks;
++}
+
+- __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
++static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
++ const __u8 *buffer, int nBytes,
++ int useReserve)
++{
++ /* Find old chunk Need to do this to get serial number
++ * Write new one and patch into tree.
++ * Invalidate old tags.
++ */
+
+- /* Got to read and rewrite the last chunk with its new size and zero pad */
+- yaffs_ReadChunkDataFromObject(in, lastChunk,
+- localBuffer);
++ int prevChunkId;
++ yaffs_ExtendedTags prevTags;
+
+- memset(localBuffer + newSizeOfPartialChunk, 0,
+- dev->nDataBytesPerChunk - newSizeOfPartialChunk);
++ int newChunkId;
++ yaffs_ExtendedTags newTags;
+
+- yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
+- newSizeOfPartialChunk, 1);
++ yaffs_Device *dev = in->myDev;
+
+- yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
+- }
++ yaffs_CheckGarbageCollection(dev,0);
+
+- in->variant.fileVariant.fileSize = newSize;
++ /* Get the previous chunk at this location in the file if it exists.
++ * If it does not exist then put a zero into the tree. This creates
++ * the tnode now, rather than later when it is harder to clean up.
++ */
++ prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
++ if(prevChunkId < 1 &&
++ !yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0))
++ return 0;
+
+- yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
+- } else {
+- /* newsSize > oldFileSize */
+- in->variant.fileVariant.fileSize = newSize;
+- }
++ /* Set up new tags */
++ yaffs_InitialiseTags(&newTags);
+
++ newTags.chunkId = chunkInInode;
++ newTags.objectId = in->objectId;
++ newTags.serialNumber =
++ (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
++ newTags.byteCount = nBytes;
+
+- /* Write a new object header.
+- * show we've shrunk the file, if need be
+- * Do this only if the file is not in the deleted directories.
+- */
+- if (in->parent &&
+- in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
+- in->parent->objectId != YAFFS_OBJECTID_DELETED)
+- yaffs_UpdateObjectHeader(in, NULL, 0,
+- (newSize < oldFileSize) ? 1 : 0, 0);
++ if (nBytes < 1 || nBytes > dev->param.totalBytesPerChunk) {
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
++ YBUG();
++ }
++
++
++ newChunkId =
++ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
++ useReserve);
+
+- return YAFFS_OK;
+-}
++ if (newChunkId > 0) {
++ yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
+
+-loff_t yaffs_GetFileSize(yaffs_Object *obj)
+-{
+- obj = yaffs_GetEquivalentObject(obj);
++ if (prevChunkId > 0)
++ yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
+
+- switch (obj->variantType) {
+- case YAFFS_OBJECT_TYPE_FILE:
+- return obj->variant.fileVariant.fileSize;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- return yaffs_strlen(obj->variant.symLinkVariant.alias);
+- default:
+- return 0;
++ yaffs_VerifyFileSanity(in);
+ }
++ return newChunkId;
++
+ }
+
++/* UpdateObjectHeader updates the header on NAND for an object.
++ * If name is not NULL, then that new name is used.
++ */
++int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
++ int isShrink, int shadows, yaffs_XAttrMod *xmod)
++{
+
++ yaffs_BlockInfo *bi;
+
+-int yaffs_FlushFile(yaffs_Object *in, int updateTime)
+-{
+- int retVal;
+- if (in->dirty) {
+- yaffs_FlushFilesChunkCache(in);
+- if (updateTime) {
+-#ifdef CONFIG_YAFFS_WINCE
+- yfsd_WinFileTimeNow(in->win_mtime);
+-#else
++ yaffs_Device *dev = in->myDev;
+
+- in->yst_mtime = Y_CURRENT_TIME;
++ int prevChunkId;
++ int retVal = 0;
++ int result = 0;
+
+-#endif
+- }
++ int newChunkId;
++ yaffs_ExtendedTags newTags;
++ yaffs_ExtendedTags oldTags;
++ const YCHAR *alias = NULL;
+
+- retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
+- 0) ? YAFFS_OK : YAFFS_FAIL;
+- } else {
+- retVal = YAFFS_OK;
+- }
++ __u8 *buffer = NULL;
++ YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
+
+- return retVal;
++ yaffs_ObjectHeader *oh = NULL;
+
+-}
++ yaffs_strcpy(oldName, _Y("silly old name"));
+
+-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
+-{
+
+- /* First off, invalidate the file's data in the cache, without flushing. */
+- yaffs_InvalidateWholeChunkCache(in);
++ if (!in->fake ||
++ in == dev->rootDir || /* The rootDir should also be saved */
++ force || xmod) {
+
+- if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
+- /* Move to the unlinked directory so we have a record that it was deleted. */
+- yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
++ yaffs_CheckGarbageCollection(dev,0);
++ yaffs_CheckObjectDetailsLoaded(in);
+
+- }
++ buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
++ oh = (yaffs_ObjectHeader *) buffer;
+
+- yaffs_RemoveObjectFromDirectory(in);
+- yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
+- in->hdrChunk = 0;
++ prevChunkId = in->hdrChunk;
+
+- yaffs_FreeObject(in);
+- return YAFFS_OK;
++ if (prevChunkId > 0) {
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
++ buffer, &oldTags);
+
+-}
++ yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
+
+-/* yaffs_DeleteFile deletes the whole file data
+- * and the inode associated with the file.
+- * It does not delete the links associated with the file.
+- */
+-static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
+-{
++ memcpy(oldName, oh->name, sizeof(oh->name));
++ memset(buffer, 0xFF, sizeof(yaffs_ObjectHeader));
++ } else
++ memset(buffer, 0xFF, dev->nDataBytesPerChunk);
+
+- int retVal;
+- int immediateDeletion = 0;
++ oh->type = in->variantType;
++ oh->yst_mode = in->yst_mode;
++ oh->shadowsObject = oh->inbandShadowsObject = shadows;
+
+-#ifdef __KERNEL__
+- if (!in->myInode)
+- immediateDeletion = 1;
++#ifdef CONFIG_YAFFS_WINCE
++ oh->win_atime[0] = in->win_atime[0];
++ oh->win_ctime[0] = in->win_ctime[0];
++ oh->win_mtime[0] = in->win_mtime[0];
++ oh->win_atime[1] = in->win_atime[1];
++ oh->win_ctime[1] = in->win_ctime[1];
++ oh->win_mtime[1] = in->win_mtime[1];
+ #else
+- if (in->inUse <= 0)
+- immediateDeletion = 1;
++ oh->yst_uid = in->yst_uid;
++ oh->yst_gid = in->yst_gid;
++ oh->yst_atime = in->yst_atime;
++ oh->yst_mtime = in->yst_mtime;
++ oh->yst_ctime = in->yst_ctime;
++ oh->yst_rdev = in->yst_rdev;
+ #endif
++ if (in->parent)
++ oh->parentObjectId = in->parent->objectId;
++ else
++ oh->parentObjectId = 0;
+
+- if (immediateDeletion) {
+- retVal =
+- yaffs_ChangeObjectName(in, in->myDev->deletedDir,
+- _Y("deleted"), 0, 0);
+- T(YAFFS_TRACE_TRACING,
+- (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
+- in->objectId));
+- in->deleted = 1;
+- in->myDev->nDeletedFiles++;
+- if (1 || in->myDev->isYaffs2)
+- yaffs_ResizeFile(in, 0);
+- yaffs_SoftDeleteFile(in);
+- } else {
+- retVal =
+- yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
+- _Y("unlinked"), 0, 0);
+- }
++ if (name && *name) {
++ memset(oh->name, 0, sizeof(oh->name));
++ yaffs_LoadObjectHeaderFromName(dev,oh->name,name);
++ } else if (prevChunkId > 0)
++ memcpy(oh->name, oldName, sizeof(oh->name));
++ else
++ memset(oh->name, 0, sizeof(oh->name));
+
++ oh->isShrink = isShrink;
+
+- return retVal;
+-}
++ switch (in->variantType) {
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* Should not happen */
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++ oh->fileSize =
++ (oh->parentObjectId == YAFFS_OBJECTID_DELETED
++ || oh->parentObjectId ==
++ YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
++ fileVariant.fileSize;
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ oh->equivalentObjectId =
++ in->variant.hardLinkVariant.equivalentObjectId;
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ alias = in->variant.symLinkVariant.alias;
++ if(!alias)
++ alias = _Y("no alias");
++ yaffs_strncpy(oh->alias,
++ alias,
++ YAFFS_MAX_ALIAS_LENGTH);
++ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
++ break;
++ }
+
+-int yaffs_DeleteFile(yaffs_Object *in)
+-{
+- int retVal = YAFFS_OK;
+- int deleted = in->deleted;
++ /* process any xattrib modifications */
++ if(xmod)
++ yaffs_ApplyXMod(in, (char *)buffer, xmod);
+
+- yaffs_ResizeFile(in, 0);
+
+- if (in->nDataChunks > 0) {
+- /* Use soft deletion if there is data in the file.
+- * That won't be the case if it has been resized to zero.
+- */
+- if (!in->unlinked)
+- retVal = yaffs_UnlinkFileIfNeeded(in);
++ /* Tags */
++ yaffs_InitialiseTags(&newTags);
++ in->serial++;
++ newTags.chunkId = 0;
++ newTags.objectId = in->objectId;
++ newTags.serialNumber = in->serial;
+
+- if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
+- in->deleted = 1;
+- deleted = 1;
+- in->myDev->nDeletedFiles++;
+- yaffs_SoftDeleteFile(in);
+- }
+- return deleted ? YAFFS_OK : YAFFS_FAIL;
+- } else {
+- /* The file has no data chunks so we toss it immediately */
+- yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
+- in->variant.fileVariant.top = NULL;
+- yaffs_DoGenericObjectDeletion(in);
++ /* Add extra info for file header */
+
+- return YAFFS_OK;
+- }
+-}
++ newTags.extraHeaderInfoAvailable = 1;
++ newTags.extraParentObjectId = oh->parentObjectId;
++ newTags.extraFileLength = oh->fileSize;
++ newTags.extraIsShrinkHeader = oh->isShrink;
++ newTags.extraEquivalentObjectId = oh->equivalentObjectId;
++ newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
++ newTags.extraObjectType = in->variantType;
+
+-static int yaffs_DeleteDirectory(yaffs_Object *in)
+-{
+- /* First check that the directory is empty. */
+- if (ylist_empty(&in->variant.directoryVariant.children))
+- return yaffs_DoGenericObjectDeletion(in);
++ yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
+
+- return YAFFS_FAIL;
++ /* Create new chunk in NAND */
++ newChunkId =
++ yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
++ (prevChunkId > 0) ? 1 : 0);
+
+-}
++ if (newChunkId >= 0) {
+
+-static int yaffs_DeleteSymLink(yaffs_Object *in)
+-{
+- YFREE(in->variant.symLinkVariant.alias);
++ in->hdrChunk = newChunkId;
+
+- return yaffs_DoGenericObjectDeletion(in);
+-}
++ if (prevChunkId > 0) {
++ yaffs_DeleteChunk(dev, prevChunkId, 1,
++ __LINE__);
++ }
+
+-static int yaffs_DeleteHardLink(yaffs_Object *in)
+-{
+- /* remove this hardlink from the list assocaited with the equivalent
+- * object
+- */
+- ylist_del_init(&in->hardLinks);
+- return yaffs_DoGenericObjectDeletion(in);
+-}
++ if (!yaffs_ObjectHasCachedWriteData(in))
++ in->dirty = 0;
++
++ /* If this was a shrink, then mark the block that the chunk lives on */
++ if (isShrink) {
++ bi = yaffs_GetBlockInfo(in->myDev,
++ newChunkId / in->myDev->param.nChunksPerBlock);
++ bi->hasShrinkHeader = 1;
++ }
++
++ }
++
++ retVal = newChunkId;
+
+-int yaffs_DeleteObject(yaffs_Object *obj)
+-{
+-int retVal = -1;
+- switch (obj->variantType) {
+- case YAFFS_OBJECT_TYPE_FILE:
+- retVal = yaffs_DeleteFile(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- return yaffs_DeleteDirectory(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- retVal = yaffs_DeleteSymLink(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- retVal = yaffs_DeleteHardLink(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- retVal = yaffs_DoGenericObjectDeletion(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- retVal = 0;
+- break; /* should not happen. */
+ }
+
++ if (buffer)
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
++
+ return retVal;
+ }
+
+-static int yaffs_UnlinkWorker(yaffs_Object *obj)
++/*------------------------ Short Operations Cache ----------------------------------------
++ * In many situations where there is no high level buffering (eg WinCE) a lot of
++ * reads might be short sequential reads, and a lot of writes may be short
++ * sequential writes. eg. scanning/writing a jpeg file.
++ * In these cases, a short read/write cache can provide a huge perfomance benefit
++ * with dumb-as-a-rock code.
++ * In Linux, the page cache provides read buffering aand the short op cache provides write
++ * buffering.
++ *
++ * There are a limited number (~10) of cache chunks per device so that we don't
++ * need a very intelligent search.
++ */
++
++static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
+ {
++ yaffs_Device *dev = obj->myDev;
++ int i;
++ yaffs_ChunkCache *cache;
++ int nCaches = obj->myDev->param.nShortOpCaches;
+
+- int immediateDeletion = 0;
++ for (i = 0; i < nCaches; i++) {
++ cache = &dev->srCache[i];
++ if (cache->object == obj &&
++ cache->dirty)
++ return 1;
++ }
+
+-#ifdef __KERNEL__
+- if (!obj->myInode)
+- immediateDeletion = 1;
+-#else
+- if (obj->inUse <= 0)
+- immediateDeletion = 1;
+-#endif
++ return 0;
++}
+
+- if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
+- return yaffs_DeleteHardLink(obj);
+- } else if (!ylist_empty(&obj->hardLinks)) {
+- /* Curve ball: We're unlinking an object that has a hardlink.
+- *
+- * This problem arises because we are not strictly following
+- * The Linux link/inode model.
+- *
+- * We can't really delete the object.
+- * Instead, we do the following:
+- * - Select a hardlink.
+- * - Unhook it from the hard links
+- * - Unhook it from its parent directory (so that the rename can work)
+- * - Rename the object to the hardlink's name.
+- * - Delete the hardlink
+- */
+
+- yaffs_Object *hl;
+- int retVal;
+- YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
++static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
++{
++ yaffs_Device *dev = obj->myDev;
++ int lowest = -99; /* Stop compiler whining. */
++ int i;
++ yaffs_ChunkCache *cache;
++ int chunkWritten = 0;
++ int nCaches = obj->myDev->param.nShortOpCaches;
+
+- hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
++ if (nCaches > 0) {
++ do {
++ cache = NULL;
+
+- ylist_del_init(&hl->hardLinks);
+- ylist_del_init(&hl->siblings);
++ /* Find the dirty cache for this object with the lowest chunk id. */
++ for (i = 0; i < nCaches; i++) {
++ if (dev->srCache[i].object == obj &&
++ dev->srCache[i].dirty) {
++ if (!cache
++ || dev->srCache[i].chunkId <
++ lowest) {
++ cache = &dev->srCache[i];
++ lowest = cache->chunkId;
++ }
++ }
++ }
+
+- yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
++ if (cache && !cache->locked) {
++ /* Write it out and free it up */
+
+- retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
++ chunkWritten =
++ yaffs_WriteChunkDataToObject(cache->object,
++ cache->chunkId,
++ cache->data,
++ cache->nBytes,
++ 1);
++ cache->dirty = 0;
++ cache->object = NULL;
++ }
+
+- if (retVal == YAFFS_OK)
+- retVal = yaffs_DoGenericObjectDeletion(hl);
++ } while (cache && chunkWritten > 0);
+
+- return retVal;
++ if (cache) {
++ /* Hoosterman, disk full while writing cache out. */
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
+
+- } else if (immediateDeletion) {
+- switch (obj->variantType) {
+- case YAFFS_OBJECT_TYPE_FILE:
+- return yaffs_DeleteFile(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- return yaffs_DeleteDirectory(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- return yaffs_DeleteSymLink(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- return yaffs_DoGenericObjectDeletion(obj);
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- default:
+- return YAFFS_FAIL;
+ }
+- } else
+- return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
+- _Y("unlinked"), 0, 0);
++ }
++
+ }
+
++/*yaffs_FlushEntireDeviceCache(dev)
++ *
++ *
++ */
+
+-static int yaffs_UnlinkObject(yaffs_Object *obj)
++void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
+ {
++ yaffs_Object *obj;
++ int nCaches = dev->param.nShortOpCaches;
++ int i;
+
+- if (obj && obj->unlinkAllowed)
+- return yaffs_UnlinkWorker(obj);
++ /* Find a dirty object in the cache and flush it...
++ * until there are no further dirty objects.
++ */
++ do {
++ obj = NULL;
++ for (i = 0; i < nCaches && !obj; i++) {
++ if (dev->srCache[i].object &&
++ dev->srCache[i].dirty)
++ obj = dev->srCache[i].object;
+
+- return YAFFS_FAIL;
++ }
++ if (obj)
++ yaffs_FlushFilesChunkCache(obj);
++
++ } while (obj);
+
+ }
+-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
++
++
++/* Grab us a cache chunk for use.
++ * First look for an empty one.
++ * Then look for the least recently used non-dirty one.
++ * Then look for the least recently used dirty one...., flush and look again.
++ */
++static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
+ {
+- yaffs_Object *obj;
++ int i;
+
+- obj = yaffs_FindObjectByName(dir, name);
+- return yaffs_UnlinkObject(obj);
+-}
++ if (dev->param.nShortOpCaches > 0) {
++ for (i = 0; i < dev->param.nShortOpCaches; i++) {
++ if (!dev->srCache[i].object)
++ return &dev->srCache[i];
++ }
++ }
+
+-/*----------------------- Initialisation Scanning ---------------------- */
++ return NULL;
++}
+
+-static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
+- int backwardScanning)
++static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
+ {
+- yaffs_Object *obj;
++ yaffs_ChunkCache *cache;
++ yaffs_Object *theObj;
++ int usage;
++ int i;
++ int pushout;
+
+- if (!backwardScanning) {
+- /* Handle YAFFS1 forward scanning case
+- * For YAFFS1 we always do the deletion
+- */
++ if (dev->param.nShortOpCaches > 0) {
++ /* Try find a non-dirty one... */
+
+- } else {
+- /* Handle YAFFS2 case (backward scanning)
+- * If the shadowed object exists then ignore.
+- */
+- if (yaffs_FindObjectByNumber(dev, objId))
+- return;
+- }
++ cache = yaffs_GrabChunkCacheWorker(dev);
+
+- /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
+- * We put it in unlinked dir to be cleaned up after the scanning
+- */
+- obj =
+- yaffs_FindOrCreateObjectByNumber(dev, objId,
+- YAFFS_OBJECT_TYPE_FILE);
+- if (!obj)
+- return;
+- yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
+- obj->variant.fileVariant.shrinkSize = 0;
+- obj->valid = 1; /* So that we don't read any other info for this file */
++ if (!cache) {
++ /* They were all dirty, find the last recently used object and flush
++ * its cache, then find again.
++ * NB what's here is not very accurate, we actually flush the object
++ * the last recently used page.
++ */
+
+-}
++ /* With locking we can't assume we can use entry zero */
+
+-typedef struct {
+- int seq;
+- int block;
+-} yaffs_BlockIndex;
++ theObj = NULL;
++ usage = -1;
++ cache = NULL;
++ pushout = -1;
+
++ for (i = 0; i < dev->param.nShortOpCaches; i++) {
++ if (dev->srCache[i].object &&
++ !dev->srCache[i].locked &&
++ (dev->srCache[i].lastUse < usage || !cache)) {
++ usage = dev->srCache[i].lastUse;
++ theObj = dev->srCache[i].object;
++ cache = &dev->srCache[i];
++ pushout = i;
++ }
++ }
+
+-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
+-{
+- yaffs_Object *hl;
+- yaffs_Object *in;
++ if (!cache || cache->dirty) {
++ /* Flush and try again */
++ yaffs_FlushFilesChunkCache(theObj);
++ cache = yaffs_GrabChunkCacheWorker(dev);
++ }
+
+- while (hardList) {
+- hl = hardList;
+- hardList = (yaffs_Object *) (hardList->hardLinks.next);
++ }
++ return cache;
++ } else
++ return NULL;
+
+- in = yaffs_FindObjectByNumber(dev,
+- hl->variant.hardLinkVariant.
+- equivalentObjectId);
++}
+
+- if (in) {
+- /* Add the hardlink pointers */
+- hl->variant.hardLinkVariant.equivalentObject = in;
+- ylist_add(&hl->hardLinks, &in->hardLinks);
+- } else {
+- /* Todo Need to report/handle this better.
+- * Got a problem... hardlink to a non-existant object
+- */
+- hl->variant.hardLinkVariant.equivalentObject = NULL;
+- YINIT_LIST_HEAD(&hl->hardLinks);
++/* Find a cached chunk */
++static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
++ int chunkId)
++{
++ yaffs_Device *dev = obj->myDev;
++ int i;
++ if (dev->param.nShortOpCaches > 0) {
++ for (i = 0; i < dev->param.nShortOpCaches; i++) {
++ if (dev->srCache[i].object == obj &&
++ dev->srCache[i].chunkId == chunkId) {
++ dev->cacheHits++;
+
++ return &dev->srCache[i];
++ }
+ }
+ }
++ return NULL;
+ }
+
++/* Mark the chunk for the least recently used algorithym */
++static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
++ int isAWrite)
++{
++
++ if (dev->param.nShortOpCaches > 0) {
++ if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
++ /* Reset the cache usages */
++ int i;
++ for (i = 1; i < dev->param.nShortOpCaches; i++)
++ dev->srCache[i].lastUse = 0;
+
++ dev->srLastUse = 0;
++ }
+
++ dev->srLastUse++;
+
++ cache->lastUse = dev->srLastUse;
+
+-static int ybicmp(const void *a, const void *b)
+-{
+- register int aseq = ((yaffs_BlockIndex *)a)->seq;
+- register int bseq = ((yaffs_BlockIndex *)b)->seq;
+- register int ablock = ((yaffs_BlockIndex *)a)->block;
+- register int bblock = ((yaffs_BlockIndex *)b)->block;
+- if (aseq == bseq)
+- return ablock - bblock;
+- else
+- return aseq - bseq;
++ if (isAWrite)
++ cache->dirty = 1;
++ }
+ }
+
++/* Invalidate a single cache page.
++ * Do this when a whole page gets written,
++ * ie the short cache for this page is no longer valid.
++ */
++static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
++{
++ if (object->myDev->param.nShortOpCaches > 0) {
++ yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
+
+-struct yaffs_ShadowFixerStruct {
+- int objectId;
+- int shadowedId;
+- struct yaffs_ShadowFixerStruct *next;
+-};
+-
++ if (cache)
++ cache->object = NULL;
++ }
++}
+
+-static void yaffs_StripDeletedObjects(yaffs_Device *dev)
++/* Invalidate all the cache pages associated with this object
++ * Do this whenever ther file is deleted or resized.
++ */
++static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
+ {
+- /*
+- * Sort out state of unlinked and deleted objects after scanning.
+- */
+- struct ylist_head *i;
+- struct ylist_head *n;
+- yaffs_Object *l;
++ int i;
++ yaffs_Device *dev = in->myDev;
+
+- /* Soft delete all the unlinked files */
+- ylist_for_each_safe(i, n,
+- &dev->unlinkedDir->variant.directoryVariant.children) {
+- if (i) {
+- l = ylist_entry(i, yaffs_Object, siblings);
+- yaffs_DeleteObject(l);
++ if (dev->param.nShortOpCaches > 0) {
++ /* Invalidate it. */
++ for (i = 0; i < dev->param.nShortOpCaches; i++) {
++ if (dev->srCache[i].object == in)
++ dev->srCache[i].object = NULL;
+ }
+ }
++}
+
+- ylist_for_each_safe(i, n,
+- &dev->deletedDir->variant.directoryVariant.children) {
+- if (i) {
+- l = ylist_entry(i, yaffs_Object, siblings);
+- yaffs_DeleteObject(l);
+- }
+- }
+
+-}
++/*--------------------- File read/write ------------------------
++ * Read and write have very similar structures.
++ * In general the read/write has three parts to it
++ * An incomplete chunk to start with (if the read/write is not chunk-aligned)
++ * Some complete chunks
++ * An incomplete chunk to end off with
++ *
++ * Curve-balls: the first chunk might also be the last chunk.
++ */
+
+-static int yaffs_Scan(yaffs_Device *dev)
++int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
++ int nBytes)
+ {
+- yaffs_ExtendedTags tags;
+- int blk;
+- int blockIterator;
+- int startIterator;
+- int endIterator;
+- int result;
+
+ int chunk;
+- int c;
+- int deleted;
+- yaffs_BlockState state;
+- yaffs_Object *hardList = NULL;
+- yaffs_BlockInfo *bi;
+- __u32 sequenceNumber;
+- yaffs_ObjectHeader *oh;
+- yaffs_Object *in;
+- yaffs_Object *parent;
+-
+- int alloc_failed = 0;
++ __u32 start;
++ int nToCopy;
++ int n = nBytes;
++ int nDone = 0;
++ yaffs_ChunkCache *cache;
+
+- struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
++ yaffs_Device *dev;
+
++ dev = in->myDev;
+
+- __u8 *chunkData;
++ while (n > 0) {
++ /* chunk = offset / dev->nDataBytesPerChunk + 1; */
++ /* start = offset % dev->nDataBytesPerChunk; */
++ yaffs_AddrToChunk(dev, offset, &chunk, &start);
++ chunk++;
+
++ /* OK now check for the curveball where the start and end are in
++ * the same chunk.
++ */
++ if ((start + n) < dev->nDataBytesPerChunk)
++ nToCopy = n;
++ else
++ nToCopy = dev->nDataBytesPerChunk - start;
+
++ cache = yaffs_FindChunkCache(in, chunk);
+
+- T(YAFFS_TRACE_SCAN,
+- (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
+- dev->internalStartBlock, dev->internalEndBlock));
+-
+- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+-
+- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
+-
+- /* Scan all the blocks to determine their state */
+- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
+- bi = yaffs_GetBlockInfo(dev, blk);
+- yaffs_ClearChunkBits(dev, blk);
+- bi->pagesInUse = 0;
+- bi->softDeletions = 0;
++ /* If the chunk is already in the cache or it is less than a whole chunk
++ * or we're using inband tags then use the cache (if there is caching)
++ * else bypass the cache.
++ */
++ if (cache || nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
++ if (dev->param.nShortOpCaches > 0) {
+
+- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
++ /* If we can't find the data in the cache, then load it up. */
+
+- bi->blockState = state;
+- bi->sequenceNumber = sequenceNumber;
++ if (!cache) {
++ cache = yaffs_GrabChunkCache(in->myDev);
++ cache->object = in;
++ cache->chunkId = chunk;
++ cache->dirty = 0;
++ cache->locked = 0;
++ yaffs_ReadChunkDataFromObject(in, chunk,
++ cache->
++ data);
++ cache->nBytes = 0;
++ }
+
+- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
++ yaffs_UseChunkCache(dev, cache, 0);
+
+- T(YAFFS_TRACE_SCAN_DEBUG,
+- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
+- state, sequenceNumber));
++ cache->locked = 1;
+
+- if (state == YAFFS_BLOCK_STATE_DEAD) {
+- T(YAFFS_TRACE_BAD_BLOCKS,
+- (TSTR("block %d is bad" TENDSTR), blk));
+- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
+- T(YAFFS_TRACE_SCAN_DEBUG,
+- (TSTR("Block empty " TENDSTR)));
+- dev->nErasedBlocks++;
+- dev->nFreeChunks += dev->nChunksPerBlock;
+- }
+- }
+
+- startIterator = dev->internalStartBlock;
+- endIterator = dev->internalEndBlock;
++ memcpy(buffer, &cache->data[start], nToCopy);
+
+- /* For each block.... */
+- for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
+- blockIterator++) {
++ cache->locked = 0;
++ } else {
++ /* Read into the local buffer then copy..*/
+
+- YYIELD();
++ __u8 *localBuffer =
++ yaffs_GetTempBuffer(dev, __LINE__);
++ yaffs_ReadChunkDataFromObject(in, chunk,
++ localBuffer);
+
+- YYIELD();
++ memcpy(buffer, &localBuffer[start], nToCopy);
+
+- blk = blockIterator;
+
+- bi = yaffs_GetBlockInfo(dev, blk);
+- state = bi->blockState;
++ yaffs_ReleaseTempBuffer(dev, localBuffer,
++ __LINE__);
++ }
+
+- deleted = 0;
++ } else {
+
+- /* For each chunk in each block that needs scanning....*/
+- for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
+- state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
+- /* Read the tags and decide what to do */
+- chunk = blk * dev->nChunksPerBlock + c;
++ /* A full chunk. Read directly into the supplied buffer. */
++ yaffs_ReadChunkDataFromObject(in, chunk, buffer);
+
+- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+- &tags);
++ }
+
+- /* Let's have a good look at this chunk... */
++ n -= nToCopy;
++ offset += nToCopy;
++ buffer += nToCopy;
++ nDone += nToCopy;
+
+- if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
+- /* YAFFS1 only...
+- * A deleted chunk
+- */
+- deleted++;
+- dev->nFreeChunks++;
+- /*T((" %d %d deleted\n",blk,c)); */
+- } else if (!tags.chunkUsed) {
+- /* An unassigned chunk in the block
+- * This means that either the block is empty or
+- * this is the one being allocated from
+- */
++ }
+
+- if (c == 0) {
+- /* We're looking at the first chunk in the block so the block is unused */
+- state = YAFFS_BLOCK_STATE_EMPTY;
+- dev->nErasedBlocks++;
+- } else {
+- /* this is the block being allocated from */
+- T(YAFFS_TRACE_SCAN,
+- (TSTR
+- (" Allocating from %d %d" TENDSTR),
+- blk, c));
+- state = YAFFS_BLOCK_STATE_ALLOCATING;
+- dev->allocationBlock = blk;
+- dev->allocationPage = c;
+- dev->allocationBlockFinder = blk;
+- /* Set it to here to encourage the allocator to go forth from here. */
++ return nDone;
++}
+
+- }
++int yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
++ int nBytes, int writeThrough)
++{
+
+- dev->nFreeChunks += (dev->nChunksPerBlock - c);
+- } else if (tags.chunkId > 0) {
+- /* chunkId > 0 so it is a data chunk... */
+- unsigned int endpos;
+-
+- yaffs_SetChunkBit(dev, blk, c);
+- bi->pagesInUse++;
+-
+- in = yaffs_FindOrCreateObjectByNumber(dev,
+- tags.
+- objectId,
+- YAFFS_OBJECT_TYPE_FILE);
+- /* PutChunkIntoFile checks for a clash (two data chunks with
+- * the same chunkId).
+- */
++ int chunk;
++ __u32 start;
++ int nToCopy;
++ int n = nBytes;
++ int nDone = 0;
++ int nToWriteBack;
++ int startOfWrite = offset;
++ int chunkWritten = 0;
++ __u32 nBytesRead;
++ __u32 chunkStart;
+
+- if (!in)
+- alloc_failed = 1;
++ yaffs_Device *dev;
+
+- if (in) {
+- if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
+- alloc_failed = 1;
+- }
++ dev = in->myDev;
+
+- endpos =
+- (tags.chunkId - 1) * dev->nDataBytesPerChunk +
+- tags.byteCount;
+- if (in &&
+- in->variantType == YAFFS_OBJECT_TYPE_FILE
+- && in->variant.fileVariant.scannedFileSize <
+- endpos) {
+- in->variant.fileVariant.
+- scannedFileSize = endpos;
+- if (!dev->useHeaderFileSize) {
+- in->variant.fileVariant.
+- fileSize =
+- in->variant.fileVariant.
+- scannedFileSize;
+- }
++ while (n > 0 && chunkWritten >= 0) {
++ yaffs_AddrToChunk(dev, offset, &chunk, &start);
+
+- }
+- /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
+- } else {
+- /* chunkId == 0, so it is an ObjectHeader.
+- * Thus, we read in the object header and make the object
+- */
+- yaffs_SetChunkBit(dev, blk, c);
+- bi->pagesInUse++;
++ if (chunk * dev->nDataBytesPerChunk + start != offset ||
++ start >= dev->nDataBytesPerChunk) {
++ T(YAFFS_TRACE_ERROR, (
++ TSTR("AddrToChunk of offset %d gives chunk %d start %d"
++ TENDSTR),
++ (int)offset, chunk, start));
++ }
++ chunk++; /* File pos to chunk in file offset */
+
+- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
+- chunkData,
+- NULL);
+-
+- oh = (yaffs_ObjectHeader *) chunkData;
+-
+- in = yaffs_FindObjectByNumber(dev,
+- tags.objectId);
+- if (in && in->variantType != oh->type) {
+- /* This should not happen, but somehow
+- * Wev'e ended up with an objectId that has been reused but not yet
+- * deleted, and worse still it has changed type. Delete the old object.
+- */
++ /* OK now check for the curveball where the start and end are in
++ * the same chunk.
++ */
+
+- yaffs_DeleteObject(in);
++ if ((start + n) < dev->nDataBytesPerChunk) {
++ nToCopy = n;
+
+- in = 0;
+- }
++ /* Now folks, to calculate how many bytes to write back....
++ * If we're overwriting and not writing to then end of file then
++ * we need to write back as much as was there before.
++ */
+
+- in = yaffs_FindOrCreateObjectByNumber(dev,
+- tags.
+- objectId,
+- oh->type);
+-
+- if (!in)
+- alloc_failed = 1;
+-
+- if (in && oh->shadowsObject > 0) {
+-
+- struct yaffs_ShadowFixerStruct *fixer;
+- fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
+- if (fixer) {
+- fixer->next = shadowFixerList;
+- shadowFixerList = fixer;
+- fixer->objectId = tags.objectId;
+- fixer->shadowedId = oh->shadowsObject;
+- }
++ chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
+
+- }
++ if (chunkStart > in->variant.fileVariant.fileSize)
++ nBytesRead = 0; /* Past end of file */
++ else
++ nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
+
+- if (in && in->valid) {
+- /* We have already filled this one. We have a duplicate and need to resolve it. */
++ if (nBytesRead > dev->nDataBytesPerChunk)
++ nBytesRead = dev->nDataBytesPerChunk;
+
+- unsigned existingSerial = in->serial;
+- unsigned newSerial = tags.serialNumber;
++ nToWriteBack =
++ (nBytesRead >
++ (start + n)) ? nBytesRead : (start + n);
+
+- if (((existingSerial + 1) & 3) == newSerial) {
+- /* Use new one - destroy the exisiting one */
+- yaffs_DeleteChunk(dev,
+- in->hdrChunk,
+- 1, __LINE__);
+- in->valid = 0;
+- } else {
+- /* Use existing - destroy this one. */
+- yaffs_DeleteChunk(dev, chunk, 1,
+- __LINE__);
+- }
+- }
++ if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
++ YBUG();
+
+- if (in && !in->valid &&
+- (tags.objectId == YAFFS_OBJECTID_ROOT ||
+- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
+- /* We only load some info, don't fiddle with directory structure */
+- in->valid = 1;
+- in->variantType = oh->type;
++ } else {
++ nToCopy = dev->nDataBytesPerChunk - start;
++ nToWriteBack = dev->nDataBytesPerChunk;
++ }
+
+- in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+- in->win_atime[0] = oh->win_atime[0];
+- in->win_ctime[0] = oh->win_ctime[0];
+- in->win_mtime[0] = oh->win_mtime[0];
+- in->win_atime[1] = oh->win_atime[1];
+- in->win_ctime[1] = oh->win_ctime[1];
+- in->win_mtime[1] = oh->win_mtime[1];
+-#else
+- in->yst_uid = oh->yst_uid;
+- in->yst_gid = oh->yst_gid;
+- in->yst_atime = oh->yst_atime;
+- in->yst_mtime = oh->yst_mtime;
+- in->yst_ctime = oh->yst_ctime;
+- in->yst_rdev = oh->yst_rdev;
+-#endif
+- in->hdrChunk = chunk;
+- in->serial = tags.serialNumber;
++ if (nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
++ /* An incomplete start or end chunk (or maybe both start and end chunk),
++ * or we're using inband tags, so we want to use the cache buffers.
++ */
++ if (dev->param.nShortOpCaches > 0) {
++ yaffs_ChunkCache *cache;
++ /* If we can't find the data in the cache, then load the cache */
++ cache = yaffs_FindChunkCache(in, chunk);
+
+- } else if (in && !in->valid) {
+- /* we need to load this info */
++ if (!cache
++ && yaffs_CheckSpaceForAllocation(dev, 1)) {
++ cache = yaffs_GrabChunkCache(dev);
++ cache->object = in;
++ cache->chunkId = chunk;
++ cache->dirty = 0;
++ cache->locked = 0;
++ yaffs_ReadChunkDataFromObject(in, chunk,
++ cache->data);
++ } else if (cache &&
++ !cache->dirty &&
++ !yaffs_CheckSpaceForAllocation(dev, 1)) {
++ /* Drop the cache if it was a read cache item and
++ * no space check has been made for it.
++ */
++ cache = NULL;
++ }
+
+- in->valid = 1;
+- in->variantType = oh->type;
++ if (cache) {
++ yaffs_UseChunkCache(dev, cache, 1);
++ cache->locked = 1;
+
+- in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+- in->win_atime[0] = oh->win_atime[0];
+- in->win_ctime[0] = oh->win_ctime[0];
+- in->win_mtime[0] = oh->win_mtime[0];
+- in->win_atime[1] = oh->win_atime[1];
+- in->win_ctime[1] = oh->win_ctime[1];
+- in->win_mtime[1] = oh->win_mtime[1];
+-#else
+- in->yst_uid = oh->yst_uid;
+- in->yst_gid = oh->yst_gid;
+- in->yst_atime = oh->yst_atime;
+- in->yst_mtime = oh->yst_mtime;
+- in->yst_ctime = oh->yst_ctime;
+- in->yst_rdev = oh->yst_rdev;
+-#endif
+- in->hdrChunk = chunk;
+- in->serial = tags.serialNumber;
+
+- yaffs_SetObjectName(in, oh->name);
+- in->dirty = 0;
++ memcpy(&cache->data[start], buffer,
++ nToCopy);
+
+- /* directory stuff...
+- * hook up to parent
+- */
+
+- parent =
+- yaffs_FindOrCreateObjectByNumber
+- (dev, oh->parentObjectId,
+- YAFFS_OBJECT_TYPE_DIRECTORY);
+- if (!parent)
+- alloc_failed = 1;
+- if (parent && parent->variantType ==
+- YAFFS_OBJECT_TYPE_UNKNOWN) {
+- /* Set up as a directory */
+- parent->variantType =
+- YAFFS_OBJECT_TYPE_DIRECTORY;
+- YINIT_LIST_HEAD(&parent->variant.
+- directoryVariant.
+- children);
+- } else if (!parent || parent->variantType !=
+- YAFFS_OBJECT_TYPE_DIRECTORY) {
+- /* Hoosterman, another problem....
+- * We're trying to use a non-directory as a directory
+- */
++ cache->locked = 0;
++ cache->nBytes = nToWriteBack;
+
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
+- TENDSTR)));
+- parent = dev->lostNFoundDir;
++ if (writeThrough) {
++ chunkWritten =
++ yaffs_WriteChunkDataToObject
++ (cache->object,
++ cache->chunkId,
++ cache->data, cache->nBytes,
++ 1);
++ cache->dirty = 0;
+ }
+
+- yaffs_AddObjectToDirectory(parent, in);
++ } else {
++ chunkWritten = -1; /* fail the write */
++ }
++ } else {
++ /* An incomplete start or end chunk (or maybe both start and end chunk)
++ * Read into the local buffer then copy, then copy over and write back.
++ */
+
+- if (0 && (parent == dev->deletedDir ||
+- parent == dev->unlinkedDir)) {
+- in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
+- dev->nDeletedFiles++;
+- }
+- /* Note re hardlinks.
+- * Since we might scan a hardlink before its equivalent object is scanned
+- * we put them all in a list.
+- * After scanning is complete, we should have all the objects, so we run through this
+- * list and fix up all the chains.
+- */
++ __u8 *localBuffer =
++ yaffs_GetTempBuffer(dev, __LINE__);
+
+- switch (in->variantType) {
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- /* Todo got a problem */
+- break;
+- case YAFFS_OBJECT_TYPE_FILE:
+- if (dev->useHeaderFileSize)
+-
+- in->variant.fileVariant.
+- fileSize =
+- oh->fileSize;
+-
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- in->variant.hardLinkVariant.
+- equivalentObjectId =
+- oh->equivalentObjectId;
+- in->hardLinks.next =
+- (struct ylist_head *)
+- hardList;
+- hardList = in;
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- /* Do nothing */
+- break;
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- /* Do nothing */
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- in->variant.symLinkVariant.alias =
+- yaffs_CloneString(oh->alias);
+- if (!in->variant.symLinkVariant.alias)
+- alloc_failed = 1;
+- break;
+- }
++ yaffs_ReadChunkDataFromObject(in, chunk,
++ localBuffer);
+
+-/*
+- if (parent == dev->deletedDir) {
+- yaffs_DestroyObject(in);
+- bi->hasShrinkHeader = 1;
+- }
+-*/
+- }
+- }
+- }
+
+- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+- /* If we got this far while scanning, then the block is fully allocated.*/
+- state = YAFFS_BLOCK_STATE_FULL;
+- }
+
+- bi->blockState = state;
++ memcpy(&localBuffer[start], buffer, nToCopy);
+
+- /* Now let's see if it was dirty */
+- if (bi->pagesInUse == 0 &&
+- !bi->hasShrinkHeader &&
+- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
+- yaffs_BlockBecameDirty(dev, blk);
+- }
++ chunkWritten =
++ yaffs_WriteChunkDataToObject(in, chunk,
++ localBuffer,
++ nToWriteBack,
++ 0);
+
+- }
++ yaffs_ReleaseTempBuffer(dev, localBuffer,
++ __LINE__);
+
++ }
+
+- /* Ok, we've done all the scanning.
+- * Fix up the hard link chains.
+- * We should now have scanned all the objects, now it's time to add these
+- * hardlinks.
+- */
++ } else {
++ /* A full chunk. Write directly from the supplied buffer. */
+
+- yaffs_HardlinkFixup(dev, hardList);
+
+- /* Fix up any shadowed objects */
+- {
+- struct yaffs_ShadowFixerStruct *fixer;
+- yaffs_Object *obj;
+-
+- while (shadowFixerList) {
+- fixer = shadowFixerList;
+- shadowFixerList = fixer->next;
+- /* Complete the rename transaction by deleting the shadowed object
+- * then setting the object header to unshadowed.
+- */
+- obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
+- if (obj)
+- yaffs_DeleteObject(obj);
+
+- obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
++ chunkWritten =
++ yaffs_WriteChunkDataToObject(in, chunk, buffer,
++ dev->nDataBytesPerChunk,
++ 0);
+
+- if (obj)
+- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
++ /* Since we've overwritten the cached data, we better invalidate it. */
++ yaffs_InvalidateChunkCache(in, chunk);
++ }
+
+- YFREE(fixer);
++ if (chunkWritten >= 0) {
++ n -= nToCopy;
++ offset += nToCopy;
++ buffer += nToCopy;
++ nDone += nToCopy;
+ }
+- }
+
+- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++ }
+
+- if (alloc_failed)
+- return YAFFS_FAIL;
++ /* Update file object */
+
+- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
++ if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
++ in->variant.fileVariant.fileSize = (startOfWrite + nDone);
+
++ in->dirty = 1;
+
+- return YAFFS_OK;
++ return nDone;
+ }
+
+-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
++int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
++ int nBytes, int writeThrough)
+ {
+- __u8 *chunkData;
+- yaffs_ObjectHeader *oh;
+- yaffs_Device *dev;
+- yaffs_ExtendedTags tags;
+- int result;
+- int alloc_failed = 0;
++ yaffs2_HandleHole(in,offset);
++ return yaffs_DoWriteDataToFile(in,buffer,offset,nBytes,writeThrough);
++}
+
+- if (!in)
+- return;
+
+- dev = in->myDev;
+
+-#if 0
+- T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
+- in->objectId,
+- in->lazyLoaded ? "not yet" : "already"));
+-#endif
++/* ---------------------- File resizing stuff ------------------ */
+
+- if (in->lazyLoaded && in->hdrChunk > 0) {
+- in->lazyLoaded = 0;
+- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
++{
+
+- result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
+- oh = (yaffs_ObjectHeader *) chunkData;
++ yaffs_Device *dev = in->myDev;
++ int oldFileSize = in->variant.fileVariant.fileSize;
+
+- in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+- in->win_atime[0] = oh->win_atime[0];
+- in->win_ctime[0] = oh->win_ctime[0];
+- in->win_mtime[0] = oh->win_mtime[0];
+- in->win_atime[1] = oh->win_atime[1];
+- in->win_ctime[1] = oh->win_ctime[1];
+- in->win_mtime[1] = oh->win_mtime[1];
+-#else
+- in->yst_uid = oh->yst_uid;
+- in->yst_gid = oh->yst_gid;
+- in->yst_atime = oh->yst_atime;
+- in->yst_mtime = oh->yst_mtime;
+- in->yst_ctime = oh->yst_ctime;
+- in->yst_rdev = oh->yst_rdev;
++ int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
+
+-#endif
+- yaffs_SetObjectName(in, oh->name);
++ int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
++ dev->nDataBytesPerChunk;
++ int i;
++ int chunkId;
+
+- if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
+- in->variant.symLinkVariant.alias =
+- yaffs_CloneString(oh->alias);
+- if (!in->variant.symLinkVariant.alias)
+- alloc_failed = 1; /* Not returned to caller */
+- }
++ /* Delete backwards so that we don't end up with holes if
++ * power is lost part-way through the operation.
++ */
++ for (i = lastDel; i >= startDel; i--) {
++ /* NB this could be optimised somewhat,
++ * eg. could retrieve the tags and write them without
++ * using yaffs_DeleteChunk
++ */
+
+- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++ chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
++ if (chunkId > 0) {
++ if (chunkId <
++ (dev->internalStartBlock * dev->param.nChunksPerBlock)
++ || chunkId >=
++ ((dev->internalEndBlock +
++ 1) * dev->param.nChunksPerBlock)) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("Found daft chunkId %d for %d" TENDSTR),
++ chunkId, i));
++ } else {
++ in->nDataChunks--;
++ yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
++ }
++ }
+ }
++
+ }
+
+-static int yaffs_ScanBackwards(yaffs_Device *dev)
++
++void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize)
+ {
+- yaffs_ExtendedTags tags;
+- int blk;
+- int blockIterator;
+- int startIterator;
+- int endIterator;
+- int nBlocksToScan = 0;
++ int newFullChunks;
++ __u32 newSizeOfPartialChunk;
++ yaffs_Device *dev = obj->myDev;
+
+- int chunk;
+- int result;
+- int c;
+- int deleted;
+- yaffs_BlockState state;
+- yaffs_Object *hardList = NULL;
+- yaffs_BlockInfo *bi;
+- __u32 sequenceNumber;
+- yaffs_ObjectHeader *oh;
+- yaffs_Object *in;
+- yaffs_Object *parent;
+- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
+- int itsUnlinked;
+- __u8 *chunkData;
++ yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
+
+- int fileSize;
+- int isShrink;
+- int foundChunksInBlock;
+- int equivalentObjectId;
+- int alloc_failed = 0;
++ yaffs_PruneResizedChunks(obj, newSize);
+
++ if (newSizeOfPartialChunk != 0) {
++ int lastChunk = 1 + newFullChunks;
++ __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
+
+- yaffs_BlockIndex *blockIndex = NULL;
+- int altBlockIndex = 0;
++ /* Got to read and rewrite the last chunk with its new size and zero pad */
++ yaffs_ReadChunkDataFromObject(obj, lastChunk, localBuffer);
++ memset(localBuffer + newSizeOfPartialChunk, 0,
++ dev->nDataBytesPerChunk - newSizeOfPartialChunk);
+
+- if (!dev->isYaffs2) {
+- T(YAFFS_TRACE_SCAN,
+- (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
+- return YAFFS_FAIL;
++ yaffs_WriteChunkDataToObject(obj, lastChunk, localBuffer,
++ newSizeOfPartialChunk, 1);
++
++ yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
+ }
+
+- T(YAFFS_TRACE_SCAN,
+- (TSTR
+- ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
+- TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
++ obj->variant.fileVariant.fileSize = newSize;
++
++ yaffs_PruneFileStructure(dev, &obj->variant.fileVariant);
++}
+
+
+- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
++int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
++{
++ yaffs_Device *dev = in->myDev;
++ int oldFileSize = in->variant.fileVariant.fileSize;
+
+- blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
++ yaffs_FlushFilesChunkCache(in);
++ yaffs_InvalidateWholeChunkCache(in);
+
+- if (!blockIndex) {
+- blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
+- altBlockIndex = 1;
+- }
++ yaffs_CheckGarbageCollection(dev,0);
+
+- if (!blockIndex) {
+- T(YAFFS_TRACE_SCAN,
+- (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
++ if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
+ return YAFFS_FAIL;
+- }
+
+- dev->blocksInCheckpoint = 0;
++ if (newSize == oldFileSize)
++ return YAFFS_OK;
++
++ if(newSize > oldFileSize){
++ yaffs2_HandleHole(in,newSize);
++ in->variant.fileVariant.fileSize = newSize;
++ } else {
++ /* newSize < oldFileSize */
++ yaffs_ResizeDown(in, newSize);
++ }
++
++ /* Write a new object header to reflect the resize.
++ * show we've shrunk the file, if need be
++ * Do this only if the file is not in the deleted directories
++ * and is not shadowed.
++ */
++ if (in->parent &&
++ !in->isShadowed &&
++ in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
++ in->parent->objectId != YAFFS_OBJECTID_DELETED)
++ yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0, NULL);
++
+
+- chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++ return YAFFS_OK;
++}
+
+- /* Scan all the blocks to determine their state */
+- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
+- bi = yaffs_GetBlockInfo(dev, blk);
+- yaffs_ClearChunkBits(dev, blk);
+- bi->pagesInUse = 0;
+- bi->softDeletions = 0;
++loff_t yaffs_GetFileSize(yaffs_Object *obj)
++{
++ YCHAR *alias = NULL;
++ obj = yaffs_GetEquivalentObject(obj);
++
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ return obj->variant.fileVariant.fileSize;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ alias = obj->variant.symLinkVariant.alias;
++ if(!alias)
++ return 0;
++ return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
++ default:
++ return 0;
++ }
++}
+
+- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
+
+- bi->blockState = state;
+- bi->sequenceNumber = sequenceNumber;
+
+- if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
+- bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
+- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
+- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
++int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
++{
++ int retVal;
++ if (in->dirty) {
++ yaffs_FlushFilesChunkCache(in);
++ if(dataSync) /* Only sync data */
++ retVal=YAFFS_OK;
++ else {
++ if (updateTime) {
++#ifdef CONFIG_YAFFS_WINCE
++ yfsd_WinFileTimeNow(in->win_mtime);
++#else
+
+- T(YAFFS_TRACE_SCAN_DEBUG,
+- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
+- state, sequenceNumber));
++ in->yst_mtime = Y_CURRENT_TIME;
+
++#endif
++ }
+
+- if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
+- dev->blocksInCheckpoint++;
++ retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0, NULL) >=
++ 0) ? YAFFS_OK : YAFFS_FAIL;
++ }
++ } else {
++ retVal = YAFFS_OK;
++ }
+
+- } else if (state == YAFFS_BLOCK_STATE_DEAD) {
+- T(YAFFS_TRACE_BAD_BLOCKS,
+- (TSTR("block %d is bad" TENDSTR), blk));
+- } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
+- T(YAFFS_TRACE_SCAN_DEBUG,
+- (TSTR("Block empty " TENDSTR)));
+- dev->nErasedBlocks++;
+- dev->nFreeChunks += dev->nChunksPerBlock;
+- } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++ return retVal;
+
+- /* Determine the highest sequence number */
+- if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
+- sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
++}
+
+- blockIndex[nBlocksToScan].seq = sequenceNumber;
+- blockIndex[nBlocksToScan].block = blk;
++static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
++{
+
+- nBlocksToScan++;
++ /* First off, invalidate the file's data in the cache, without flushing. */
++ yaffs_InvalidateWholeChunkCache(in);
+
+- if (sequenceNumber >= dev->sequenceNumber)
+- dev->sequenceNumber = sequenceNumber;
+- } else {
+- /* TODO: Nasty sequence number! */
+- T(YAFFS_TRACE_SCAN,
+- (TSTR
+- ("Block scanning block %d has bad sequence number %d"
+- TENDSTR), blk, sequenceNumber));
++ if (in->myDev->param.isYaffs2 && (in->parent != in->myDev->deletedDir)) {
++ /* Move to the unlinked directory so we have a record that it was deleted. */
++ yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
+
+- }
+- }
+ }
+
+- T(YAFFS_TRACE_SCAN,
+- (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
++ yaffs_RemoveObjectFromDirectory(in);
++ yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
++ in->hdrChunk = 0;
+
++ yaffs_FreeObject(in);
++ return YAFFS_OK;
+
++}
+
+- YYIELD();
++/* yaffs_DeleteFile deletes the whole file data
++ * and the inode associated with the file.
++ * It does not delete the links associated with the file.
++ */
++static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
++{
+
+- /* Sort the blocks */
+-#ifndef CONFIG_YAFFS_USE_OWN_SORT
+- {
+- /* Use qsort now. */
+- yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
+- }
+-#else
+- {
+- /* Dungy old bubble sort... */
++ int retVal;
++ int immediateDeletion = 0;
++ yaffs_Device *dev = in->myDev;
+
+- yaffs_BlockIndex temp;
+- int i;
+- int j;
++ if (!in->myInode)
++ immediateDeletion = 1;
+
+- for (i = 0; i < nBlocksToScan; i++)
+- for (j = i + 1; j < nBlocksToScan; j++)
+- if (blockIndex[i].seq > blockIndex[j].seq) {
+- temp = blockIndex[j];
+- blockIndex[j] = blockIndex[i];
+- blockIndex[i] = temp;
+- }
++ if (immediateDeletion) {
++ retVal =
++ yaffs_ChangeObjectName(in, in->myDev->deletedDir,
++ _Y("deleted"), 0, 0);
++ T(YAFFS_TRACE_TRACING,
++ (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
++ in->objectId));
++ in->deleted = 1;
++ in->myDev->nDeletedFiles++;
++ if (dev->param.disableSoftDelete || dev->param.isYaffs2)
++ yaffs_ResizeFile(in, 0);
++ yaffs_SoftDeleteFile(in);
++ } else {
++ retVal =
++ yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
++ _Y("unlinked"), 0, 0);
+ }
+-#endif
+
+- YYIELD();
+
+- T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
++ return retVal;
++}
++
++int yaffs_DeleteFile(yaffs_Object *in)
++{
++ int retVal = YAFFS_OK;
++ int deleted; /* Need to cache value on stack if in is freed */
++ yaffs_Device *dev = in->myDev;
++
++ if (dev->param.disableSoftDelete || dev->param.isYaffs2)
++ yaffs_ResizeFile(in, 0);
++
++ if (in->nDataChunks > 0) {
++ /* Use soft deletion if there is data in the file.
++ * That won't be the case if it has been resized to zero.
++ */
++ if (!in->unlinked)
++ retVal = yaffs_UnlinkFileIfNeeded(in);
+
+- /* Now scan the blocks looking at the data. */
+- startIterator = 0;
+- endIterator = nBlocksToScan - 1;
+- T(YAFFS_TRACE_SCAN_DEBUG,
+- (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
++ deleted = in->deleted;
+
+- /* For each block.... backwards */
+- for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
+- blockIterator--) {
+- /* Cooperative multitasking! This loop can run for so
+- long that watchdog timers expire. */
+- YYIELD();
++ if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
++ in->deleted = 1;
++ deleted = 1;
++ in->myDev->nDeletedFiles++;
++ yaffs_SoftDeleteFile(in);
++ }
++ return deleted ? YAFFS_OK : YAFFS_FAIL;
++ } else {
++ /* The file has no data chunks so we toss it immediately */
++ yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
++ in->variant.fileVariant.top = NULL;
++ yaffs_DoGenericObjectDeletion(in);
+
+- /* get the block to scan in the correct order */
+- blk = blockIndex[blockIterator].block;
++ return YAFFS_OK;
++ }
++}
+
+- bi = yaffs_GetBlockInfo(dev, blk);
++static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
++{
++ return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
++ !(ylist_empty(&obj->variant.directoryVariant.children));
++}
+
++static int yaffs_DeleteDirectory(yaffs_Object *obj)
++{
++ /* First check that the directory is empty. */
++ if (yaffs_IsNonEmptyDirectory(obj))
++ return YAFFS_FAIL;
+
+- state = bi->blockState;
++ return yaffs_DoGenericObjectDeletion(obj);
++}
+
+- deleted = 0;
++static int yaffs_DeleteSymLink(yaffs_Object *in)
++{
++ if(in->variant.symLinkVariant.alias)
++ YFREE(in->variant.symLinkVariant.alias);
++ in->variant.symLinkVariant.alias=NULL;
+
+- /* For each chunk in each block that needs scanning.... */
+- foundChunksInBlock = 0;
+- for (c = dev->nChunksPerBlock - 1;
+- !alloc_failed && c >= 0 &&
+- (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+- state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
+- /* Scan backwards...
+- * Read the tags and decide what to do
+- */
++ return yaffs_DoGenericObjectDeletion(in);
++}
+
+- chunk = blk * dev->nChunksPerBlock + c;
++static int yaffs_DeleteHardLink(yaffs_Object *in)
++{
++ /* remove this hardlink from the list assocaited with the equivalent
++ * object
++ */
++ ylist_del_init(&in->hardLinks);
++ return yaffs_DoGenericObjectDeletion(in);
++}
+
+- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
+- &tags);
++int yaffs_DeleteObject(yaffs_Object *obj)
++{
++int retVal = -1;
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ retVal = yaffs_DeleteFile(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ if(!ylist_empty(&obj->variant.directoryVariant.dirty)){
++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Remove object %d from dirty directories" TENDSTR),obj->objectId));
++ ylist_del_init(&obj->variant.directoryVariant.dirty);
++ }
++ return yaffs_DeleteDirectory(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ retVal = yaffs_DeleteSymLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ retVal = yaffs_DeleteHardLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ retVal = yaffs_DoGenericObjectDeletion(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ retVal = 0;
++ break; /* should not happen. */
++ }
+
+- /* Let's have a good look at this chunk... */
++ return retVal;
++}
+
+- if (!tags.chunkUsed) {
+- /* An unassigned chunk in the block.
+- * If there are used chunks after this one, then
+- * it is a chunk that was skipped due to failing the erased
+- * check. Just skip it so that it can be deleted.
+- * But, more typically, We get here when this is an unallocated
+- * chunk and his means that either the block is empty or
+- * this is the one being allocated from
+- */
++static int yaffs_UnlinkWorker(yaffs_Object *obj)
++{
+
+- if (foundChunksInBlock) {
+- /* This is a chunk that was skipped due to failing the erased check */
+- } else if (c == 0) {
+- /* We're looking at the first chunk in the block so the block is unused */
+- state = YAFFS_BLOCK_STATE_EMPTY;
+- dev->nErasedBlocks++;
+- } else {
+- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
+- state == YAFFS_BLOCK_STATE_ALLOCATING) {
+- if (dev->sequenceNumber == bi->sequenceNumber) {
+- /* this is the block being allocated from */
+-
+- T(YAFFS_TRACE_SCAN,
+- (TSTR
+- (" Allocating from %d %d"
+- TENDSTR), blk, c));
+-
+- state = YAFFS_BLOCK_STATE_ALLOCATING;
+- dev->allocationBlock = blk;
+- dev->allocationPage = c;
+- dev->allocationBlockFinder = blk;
+- } else {
+- /* This is a partially written block that is not
+- * the current allocation block. This block must have
+- * had a write failure, so set up for retirement.
+- */
+-
+- /* bi->needsRetiring = 1; ??? TODO */
+- bi->gcPrioritise = 1;
+-
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR("Partially written block %d detected" TENDSTR),
+- blk));
+- }
+- }
+- }
++ int immediateDeletion = 0;
+
+- dev->nFreeChunks++;
++ if (!obj->myInode)
++ immediateDeletion = 1;
+
+- } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
+- T(YAFFS_TRACE_SCAN,
+- (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
+- blk, c));
+-
+- dev->nFreeChunks++;
+-
+- } else if (tags.chunkId > 0) {
+- /* chunkId > 0 so it is a data chunk... */
+- unsigned int endpos;
+- __u32 chunkBase =
+- (tags.chunkId - 1) * dev->nDataBytesPerChunk;
+-
+- foundChunksInBlock = 1;
+-
+-
+- yaffs_SetChunkBit(dev, blk, c);
+- bi->pagesInUse++;
+-
+- in = yaffs_FindOrCreateObjectByNumber(dev,
+- tags.
+- objectId,
+- YAFFS_OBJECT_TYPE_FILE);
+- if (!in) {
+- /* Out of memory */
+- alloc_failed = 1;
+- }
++ if(obj)
++ yaffs_UpdateParent(obj->parent);
+
+- if (in &&
+- in->variantType == YAFFS_OBJECT_TYPE_FILE
+- && chunkBase <
+- in->variant.fileVariant.shrinkSize) {
+- /* This has not been invalidated by a resize */
+- if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
+- chunk, -1)) {
+- alloc_failed = 1;
+- }
++ if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
++ return yaffs_DeleteHardLink(obj);
++ } else if (!ylist_empty(&obj->hardLinks)) {
++ /* Curve ball: We're unlinking an object that has a hardlink.
++ *
++ * This problem arises because we are not strictly following
++ * The Linux link/inode model.
++ *
++ * We can't really delete the object.
++ * Instead, we do the following:
++ * - Select a hardlink.
++ * - Unhook it from the hard links
++ * - Move it from its parent directory (so that the rename can work)
++ * - Rename the object to the hardlink's name.
++ * - Delete the hardlink
++ */
+
+- /* File size is calculated by looking at the data chunks if we have not
+- * seen an object header yet. Stop this practice once we find an object header.
+- */
+- endpos =
+- (tags.chunkId -
+- 1) * dev->nDataBytesPerChunk +
+- tags.byteCount;
+-
+- if (!in->valid && /* have not got an object header yet */
+- in->variant.fileVariant.
+- scannedFileSize < endpos) {
+- in->variant.fileVariant.
+- scannedFileSize = endpos;
+- in->variant.fileVariant.
+- fileSize =
+- in->variant.fileVariant.
+- scannedFileSize;
+- }
++ yaffs_Object *hl;
++ yaffs_Object *parent;
++ int retVal;
++ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
+
+- } else if (in) {
+- /* This chunk has been invalidated by a resize, so delete */
+- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++ hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
+
+- }
+- } else {
+- /* chunkId == 0, so it is an ObjectHeader.
+- * Thus, we read in the object header and make the object
+- */
+- foundChunksInBlock = 1;
++ yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
++ parent = hl->parent;
+
+- yaffs_SetChunkBit(dev, blk, c);
+- bi->pagesInUse++;
++ ylist_del_init(&hl->hardLinks);
+
+- oh = NULL;
+- in = NULL;
++ yaffs_AddObjectToDirectory(obj->myDev->unlinkedDir, hl);
+
+- if (tags.extraHeaderInfoAvailable) {
+- in = yaffs_FindOrCreateObjectByNumber
+- (dev, tags.objectId,
+- tags.extraObjectType);
+- if (!in)
+- alloc_failed = 1;
+- }
++ retVal = yaffs_ChangeObjectName(obj,parent, name, 0, 0);
+
+- if (!in ||
+-#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
+- !in->valid ||
+-#endif
+- tags.extraShadows ||
+- (!in->valid &&
+- (tags.objectId == YAFFS_OBJECTID_ROOT ||
+- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
+-
+- /* If we don't have valid info then we need to read the chunk
+- * TODO In future we can probably defer reading the chunk and
+- * living with invalid data until needed.
+- */
++ if (retVal == YAFFS_OK)
++ retVal = yaffs_DoGenericObjectDeletion(hl);
+
+- result = yaffs_ReadChunkWithTagsFromNAND(dev,
+- chunk,
+- chunkData,
+- NULL);
+-
+- oh = (yaffs_ObjectHeader *) chunkData;
+-
+- if (dev->inbandTags) {
+- /* Fix up the header if they got corrupted by inband tags */
+- oh->shadowsObject = oh->inbandShadowsObject;
+- oh->isShrink = oh->inbandIsShrink;
+- }
++ return retVal;
+
+- if (!in) {
+- in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
+- if (!in)
+- alloc_failed = 1;
+- }
++ } else if (immediateDeletion) {
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ return yaffs_DeleteFile(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ ylist_del_init(&obj->variant.directoryVariant.dirty);
++ return yaffs_DeleteDirectory(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ return yaffs_DeleteSymLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ return yaffs_DoGenericObjectDeletion(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ default:
++ return YAFFS_FAIL;
++ }
++ } else if(yaffs_IsNonEmptyDirectory(obj))
++ return YAFFS_FAIL;
++ else
++ return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
++ _Y("unlinked"), 0, 0);
++}
+
+- }
+
+- if (!in) {
+- /* TODO Hoosterman we have a problem! */
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
+- TENDSTR), tags.objectId, chunk));
+- continue;
+- }
++static int yaffs_UnlinkObject(yaffs_Object *obj)
++{
+
+- if (in->valid) {
+- /* We have already filled this one.
+- * We have a duplicate that will be discarded, but
+- * we first have to suck out resize info if it is a file.
+- */
++ if (obj && obj->unlinkAllowed)
++ return yaffs_UnlinkWorker(obj);
+
+- if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
+- ((oh &&
+- oh->type == YAFFS_OBJECT_TYPE_FILE) ||
+- (tags.extraHeaderInfoAvailable &&
+- tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
+- __u32 thisSize =
+- (oh) ? oh->fileSize : tags.
+- extraFileLength;
+- __u32 parentObjectId =
+- (oh) ? oh->
+- parentObjectId : tags.
+- extraParentObjectId;
+-
+-
+- isShrink =
+- (oh) ? oh->isShrink : tags.
+- extraIsShrinkHeader;
++ return YAFFS_FAIL;
+
+- /* If it is deleted (unlinked at start also means deleted)
+- * we treat the file size as being zeroed at this point.
+- */
+- if (parentObjectId ==
+- YAFFS_OBJECTID_DELETED
+- || parentObjectId ==
+- YAFFS_OBJECTID_UNLINKED) {
+- thisSize = 0;
+- isShrink = 1;
+- }
++}
++int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
++{
++ yaffs_Object *obj;
+
+- if (isShrink &&
+- in->variant.fileVariant.
+- shrinkSize > thisSize) {
+- in->variant.fileVariant.
+- shrinkSize =
+- thisSize;
+- }
++ obj = yaffs_FindObjectByName(dir, name);
++ return yaffs_UnlinkObject(obj);
++}
+
+- if (isShrink)
+- bi->hasShrinkHeader = 1;
++/*----------------------- Initialisation Scanning ---------------------- */
+
+- }
+- /* Use existing - destroy this one. */
+- yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
++ int backwardScanning)
++{
++ yaffs_Object *obj;
+
+- }
++ if (!backwardScanning) {
++ /* Handle YAFFS1 forward scanning case
++ * For YAFFS1 we always do the deletion
++ */
+
+- if (!in->valid && in->variantType !=
+- (oh ? oh->type : tags.extraObjectType))
+- T(YAFFS_TRACE_ERROR, (
+- TSTR("yaffs tragedy: Bad object type, "
+- TCONT("%d != %d, for object %d at chunk ")
+- TCONT("%d during scan")
+- TENDSTR), oh ?
+- oh->type : tags.extraObjectType,
+- in->variantType, tags.objectId,
+- chunk));
+-
+- if (!in->valid &&
+- (tags.objectId == YAFFS_OBJECTID_ROOT ||
+- tags.objectId ==
+- YAFFS_OBJECTID_LOSTNFOUND)) {
+- /* We only load some info, don't fiddle with directory structure */
+- in->valid = 1;
++ } else {
++ /* Handle YAFFS2 case (backward scanning)
++ * If the shadowed object exists then ignore.
++ */
++ obj = yaffs_FindObjectByNumber(dev, objId);
++ if(obj)
++ return;
++ }
+
+- if (oh) {
+- in->variantType = oh->type;
++ /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
++ * We put it in unlinked dir to be cleaned up after the scanning
++ */
++ obj =
++ yaffs_FindOrCreateObjectByNumber(dev, objId,
++ YAFFS_OBJECT_TYPE_FILE);
++ if (!obj)
++ return;
++ obj->isShadowed = 1;
++ yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
++ obj->variant.fileVariant.shrinkSize = 0;
++ obj->valid = 1; /* So that we don't read any other info for this file */
+
+- in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+- in->win_atime[0] = oh->win_atime[0];
+- in->win_ctime[0] = oh->win_ctime[0];
+- in->win_mtime[0] = oh->win_mtime[0];
+- in->win_atime[1] = oh->win_atime[1];
+- in->win_ctime[1] = oh->win_ctime[1];
+- in->win_mtime[1] = oh->win_mtime[1];
+-#else
+- in->yst_uid = oh->yst_uid;
+- in->yst_gid = oh->yst_gid;
+- in->yst_atime = oh->yst_atime;
+- in->yst_mtime = oh->yst_mtime;
+- in->yst_ctime = oh->yst_ctime;
+- in->yst_rdev = oh->yst_rdev;
++}
+
+-#endif
+- } else {
+- in->variantType = tags.extraObjectType;
+- in->lazyLoaded = 1;
+- }
+
+- in->hdrChunk = chunk;
++void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
++{
++ yaffs_Object *hl;
++ yaffs_Object *in;
+
+- } else if (!in->valid) {
+- /* we need to load this info */
++ while (hardList) {
++ hl = hardList;
++ hardList = (yaffs_Object *) (hardList->hardLinks.next);
+
+- in->valid = 1;
+- in->hdrChunk = chunk;
++ in = yaffs_FindObjectByNumber(dev,
++ hl->variant.hardLinkVariant.
++ equivalentObjectId);
+
+- if (oh) {
+- in->variantType = oh->type;
++ if (in) {
++ /* Add the hardlink pointers */
++ hl->variant.hardLinkVariant.equivalentObject = in;
++ ylist_add(&hl->hardLinks, &in->hardLinks);
++ } else {
++ /* Todo Need to report/handle this better.
++ * Got a problem... hardlink to a non-existant object
++ */
++ hl->variant.hardLinkVariant.equivalentObject = NULL;
++ YINIT_LIST_HEAD(&hl->hardLinks);
+
+- in->yst_mode = oh->yst_mode;
+-#ifdef CONFIG_YAFFS_WINCE
+- in->win_atime[0] = oh->win_atime[0];
+- in->win_ctime[0] = oh->win_ctime[0];
+- in->win_mtime[0] = oh->win_mtime[0];
+- in->win_atime[1] = oh->win_atime[1];
+- in->win_ctime[1] = oh->win_ctime[1];
+- in->win_mtime[1] = oh->win_mtime[1];
+-#else
+- in->yst_uid = oh->yst_uid;
+- in->yst_gid = oh->yst_gid;
+- in->yst_atime = oh->yst_atime;
+- in->yst_mtime = oh->yst_mtime;
+- in->yst_ctime = oh->yst_ctime;
+- in->yst_rdev = oh->yst_rdev;
+-#endif
++ }
++ }
++}
+
+- if (oh->shadowsObject > 0)
+- yaffs_HandleShadowedObject(dev,
+- oh->
+- shadowsObject,
+- 1);
+-
+-
+- yaffs_SetObjectName(in, oh->name);
+- parent =
+- yaffs_FindOrCreateObjectByNumber
+- (dev, oh->parentObjectId,
+- YAFFS_OBJECT_TYPE_DIRECTORY);
+-
+- fileSize = oh->fileSize;
+- isShrink = oh->isShrink;
+- equivalentObjectId = oh->equivalentObjectId;
+
+- } else {
+- in->variantType = tags.extraObjectType;
+- parent =
+- yaffs_FindOrCreateObjectByNumber
+- (dev, tags.extraParentObjectId,
+- YAFFS_OBJECT_TYPE_DIRECTORY);
+- fileSize = tags.extraFileLength;
+- isShrink = tags.extraIsShrinkHeader;
+- equivalentObjectId = tags.extraEquivalentObjectId;
+- in->lazyLoaded = 1;
++static void yaffs_StripDeletedObjects(yaffs_Device *dev)
++{
++ /*
++ * Sort out state of unlinked and deleted objects after scanning.
++ */
++ struct ylist_head *i;
++ struct ylist_head *n;
++ yaffs_Object *l;
+
+- }
+- in->dirty = 0;
++ if (dev->readOnly)
++ return;
+
+- if (!parent)
+- alloc_failed = 1;
++ /* Soft delete all the unlinked files */
++ ylist_for_each_safe(i, n,
++ &dev->unlinkedDir->variant.directoryVariant.children) {
++ if (i) {
++ l = ylist_entry(i, yaffs_Object, siblings);
++ yaffs_DeleteObject(l);
++ }
++ }
+
+- /* directory stuff...
+- * hook up to parent
+- */
++ ylist_for_each_safe(i, n,
++ &dev->deletedDir->variant.directoryVariant.children) {
++ if (i) {
++ l = ylist_entry(i, yaffs_Object, siblings);
++ yaffs_DeleteObject(l);
++ }
++ }
+
+- if (parent && parent->variantType ==
+- YAFFS_OBJECT_TYPE_UNKNOWN) {
+- /* Set up as a directory */
+- parent->variantType =
+- YAFFS_OBJECT_TYPE_DIRECTORY;
+- YINIT_LIST_HEAD(&parent->variant.
+- directoryVariant.
+- children);
+- } else if (!parent || parent->variantType !=
+- YAFFS_OBJECT_TYPE_DIRECTORY) {
+- /* Hoosterman, another problem....
+- * We're trying to use a non-directory as a directory
+- */
++}
+
+- T(YAFFS_TRACE_ERROR,
+- (TSTR
+- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
+- TENDSTR)));
+- parent = dev->lostNFoundDir;
+- }
++/*
++ * This code iterates through all the objects making sure that they are rooted.
++ * Any unrooted objects are re-rooted in lost+found.
++ * An object needs to be in one of:
++ * - Directly under deleted, unlinked
++ * - Directly or indirectly under root.
++ *
++ * Note:
++ * This code assumes that we don't ever change the current relationships between
++ * directories:
++ * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
++ * lostNfound->parent == rootDir
++ *
++ * This fixes the problem where directories might have inadvertently been deleted
++ * leaving the object "hanging" without being rooted in the directory tree.
++ */
++
++static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
++{
++ return (obj == dev->deletedDir ||
++ obj == dev->unlinkedDir||
++ obj == dev->rootDir);
++}
+
+- yaffs_AddObjectToDirectory(parent, in);
++static void yaffs_FixHangingObjects(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ yaffs_Object *parent;
++ int i;
++ struct ylist_head *lh;
++ struct ylist_head *n;
++ int depthLimit;
++ int hanging;
+
+- itsUnlinked = (parent == dev->deletedDir) ||
+- (parent == dev->unlinkedDir);
++ if (dev->readOnly)
++ return;
+
+- if (isShrink) {
+- /* Mark the block as having a shrinkHeader */
+- bi->hasShrinkHeader = 1;
+- }
++ /* Iterate through the objects in each hash entry,
++ * looking at each object.
++ * Make sure it is rooted.
++ */
+
+- /* Note re hardlinks.
+- * Since we might scan a hardlink before its equivalent object is scanned
+- * we put them all in a list.
+- * After scanning is complete, we should have all the objects, so we run
+- * through this list and fix up all the chains.
++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
++ ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
++ if (lh) {
++ obj = ylist_entry(lh, yaffs_Object, hashLink);
++ parent= obj->parent;
++
++ if(yaffs_HasNULLParent(dev,obj)){
++ /* These directories are not hanging */
++ hanging = 0;
++ }
++ else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ hanging = 1;
++ else if(yaffs_HasNULLParent(dev,parent))
++ hanging = 0;
++ else {
++ /*
++ * Need to follow the parent chain to see if it is hanging.
+ */
++ hanging = 0;
++ depthLimit=100;
+
+- switch (in->variantType) {
+- case YAFFS_OBJECT_TYPE_UNKNOWN:
+- /* Todo got a problem */
+- break;
+- case YAFFS_OBJECT_TYPE_FILE:
+-
+- if (in->variant.fileVariant.
+- scannedFileSize < fileSize) {
+- /* This covers the case where the file size is greater
+- * than where the data is
+- * This will happen if the file is resized to be larger
+- * than its current data extents.
+- */
+- in->variant.fileVariant.fileSize = fileSize;
+- in->variant.fileVariant.scannedFileSize =
+- in->variant.fileVariant.fileSize;
+- }
+-
+- if (isShrink &&
+- in->variant.fileVariant.shrinkSize > fileSize) {
+- in->variant.fileVariant.shrinkSize = fileSize;
+- }
+-
+- break;
+- case YAFFS_OBJECT_TYPE_HARDLINK:
+- if (!itsUnlinked) {
+- in->variant.hardLinkVariant.equivalentObjectId =
+- equivalentObjectId;
+- in->hardLinks.next =
+- (struct ylist_head *) hardList;
+- hardList = in;
+- }
+- break;
+- case YAFFS_OBJECT_TYPE_DIRECTORY:
+- /* Do nothing */
+- break;
+- case YAFFS_OBJECT_TYPE_SPECIAL:
+- /* Do nothing */
+- break;
+- case YAFFS_OBJECT_TYPE_SYMLINK:
+- if (oh) {
+- in->variant.symLinkVariant.alias =
+- yaffs_CloneString(oh->alias);
+- if (!in->variant.symLinkVariant.alias)
+- alloc_failed = 1;
+- }
+- break;
++ while(parent != dev->rootDir &&
++ parent->parent &&
++ parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
++ depthLimit > 0){
++ parent = parent->parent;
++ depthLimit--;
+ }
+-
++ if(parent != dev->rootDir)
++ hanging = 1;
++ }
++ if(hanging){
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("Hanging object %d moved to lost and found" TENDSTR),
++ obj->objectId));
++ yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
+ }
+-
+ }
++ }
++ }
++}
+
+- } /* End of scanning for each chunk */
+
+- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
+- /* If we got this far while scanning, then the block is fully allocated. */
+- state = YAFFS_BLOCK_STATE_FULL;
+- }
++/*
++ * Delete directory contents for cleaning up lost and found.
++ */
++static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
++{
++ yaffs_Object *obj;
++ struct ylist_head *lh;
++ struct ylist_head *n;
+
+- bi->blockState = state;
++ if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
++ YBUG();
++
++ ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
++ if (lh) {
++ obj = ylist_entry(lh, yaffs_Object, siblings);
++ if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
++ yaffs_DeleteDirectoryContents(obj);
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("Deleting lost_found object %d" TENDSTR),
++ obj->objectId));
+
+- /* Now let's see if it was dirty */
+- if (bi->pagesInUse == 0 &&
+- !bi->hasShrinkHeader &&
+- bi->blockState == YAFFS_BLOCK_STATE_FULL) {
+- yaffs_BlockBecameDirty(dev, blk);
++ /* Need to use UnlinkObject since Delete would not handle
++ * hardlinked objects correctly.
++ */
++ yaffs_UnlinkObject(obj);
+ }
+-
+ }
++
++}
+
+- if (altBlockIndex)
+- YFREE_ALT(blockIndex);
+- else
+- YFREE(blockIndex);
++static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
++{
++ yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
++}
+
+- /* Ok, we've done all the scanning.
+- * Fix up the hard link chains.
+- * We should now have scanned all the objects, now it's time to add these
+- * hardlinks.
+- */
+- yaffs_HardlinkFixup(dev, hardList);
++static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
++{
++ __u8 *chunkData;
++ yaffs_ObjectHeader *oh;
++ yaffs_Device *dev;
++ yaffs_ExtendedTags tags;
++ int result;
++ int alloc_failed = 0;
+
++ if (!in)
++ return;
+
+- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++ dev = in->myDev;
+
+- if (alloc_failed)
+- return YAFFS_FAIL;
++#if 0
++ T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
++ in->objectId,
++ in->lazyLoaded ? "not yet" : "already"));
++#endif
+
+- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
++ if (in->lazyLoaded && in->hdrChunk > 0) {
++ in->lazyLoaded = 0;
++ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
+
+- return YAFFS_OK;
+-}
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
++ oh = (yaffs_ObjectHeader *) chunkData;
+
+-/*------------------------------ Directory Functions ----------------------------- */
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
+
+-static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
+-{
+- struct ylist_head *lh;
+- yaffs_Object *listObj;
++#endif
++ yaffs_SetObjectNameFromOH(in, oh);
+
+- int count = 0;
++ if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
++ in->variant.symLinkVariant.alias =
++ yaffs_CloneString(oh->alias);
++ if (!in->variant.symLinkVariant.alias)
++ alloc_failed = 1; /* Not returned to caller */
++ }
+
+- if (!obj) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
+- YBUG();
+- return;
++ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
+ }
++}
+
+- if (yaffs_SkipVerification(obj->myDev))
+- return;
++/*------------------------------ Directory Functions ----------------------------- */
+
+- if (!obj->parent) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
+- YBUG();
++/*
++ *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
++ * link (ie. name) is created or deleted in the directory.
++ *
++ * ie.
++ * create dir/a : update dir's mtime/ctime
++ * rm dir/a: update dir's mtime/ctime
++ * modify dir/a: don't update dir's mtimme/ctime
++ *
++ * This can be handled immediately or defered. Defering helps reduce the number
++ * of updates when many files in a directory are changed within a brief period.
++ *
++ * If the directory updating is defered then yaffs_UpdateDirtyDirecories must be
++ * called periodically.
++ */
++
++static void yaffs_UpdateParent(yaffs_Object *obj)
++{
++ yaffs_Device *dev;
++ if(!obj)
+ return;
+- }
+-
+- if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
+- YBUG();
+- }
+-
+- /* Iterate through the objects in each hash entry */
++#ifndef CONFIG_YAFFS_WINCE
+
+- ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
+- if (lh) {
+- listObj = ylist_entry(lh, yaffs_Object, siblings);
+- yaffs_VerifyObject(listObj);
+- if (obj == listObj)
+- count++;
++ dev = obj->myDev;
++ obj->dirty = 1;
++ obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
++ if(dev->param.deferDirectoryUpdate){
++ struct ylist_head *link = &obj->variant.directoryVariant.dirty;
++
++ if(ylist_empty(link)){
++ ylist_add(link,&dev->dirtyDirectories);
++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Added object %d to dirty directories" TENDSTR),obj->objectId));
+ }
+- }
+
+- if (count != 1) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
+- YBUG();
+- }
++ } else
++ yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, NULL);
++#endif
+ }
+
+-static void yaffs_VerifyDirectory(yaffs_Object *directory)
++void yaffs_UpdateDirtyDirectories(yaffs_Device *dev)
+ {
+- struct ylist_head *lh;
+- yaffs_Object *listObj;
+-
+- if (!directory) {
+- YBUG();
+- return;
+- }
++ struct ylist_head *link;
++ yaffs_Object *obj;
++ yaffs_DirectoryStructure *dS;
++ yaffs_ObjectVariant *oV;
+
+- if (yaffs_SkipFullVerification(directory->myDev))
+- return;
++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR)));
+
+- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
+- YBUG();
+- }
++ while(!ylist_empty(&dev->dirtyDirectories)){
++ link = dev->dirtyDirectories.next;
++ ylist_del_init(link);
++
++ dS=ylist_entry(link,yaffs_DirectoryStructure,dirty);
++ oV = ylist_entry(dS,yaffs_ObjectVariant,directoryVariant);
++ obj = ylist_entry(oV,yaffs_Object,variant);
+
+- /* Iterate through the objects in each hash entry */
++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update directory %d" TENDSTR), obj->objectId));
+
+- ylist_for_each(lh, &directory->variant.directoryVariant.children) {
+- if (lh) {
+- listObj = ylist_entry(lh, yaffs_Object, siblings);
+- if (listObj->parent != directory) {
+- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
+- YBUG();
+- }
+- yaffs_VerifyObjectInDirectory(listObj);
+- }
++ if(obj->dirty)
++ yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, NULL);
+ }
+ }
+
+-
+ static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
+ {
+ yaffs_Device *dev = obj->myDev;
+@@ -6677,18 +4474,17 @@ static void yaffs_RemoveObjectFromDirect
+
+ yaffs_VerifyDirectory(parent);
+
+- if (dev && dev->removeObjectCallback)
+- dev->removeObjectCallback(obj);
++ if (dev && dev->param.removeObjectCallback)
++ dev->param.removeObjectCallback(obj);
+
+
+ ylist_del_init(&obj->siblings);
+ obj->parent = NULL;
+-
++
+ yaffs_VerifyDirectory(parent);
+ }
+
+-
+-static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
++void yaffs_AddObjectToDirectory(yaffs_Object *directory,
+ yaffs_Object *obj)
+ {
+ if (!directory) {
+@@ -6781,7 +4577,7 @@ yaffs_Object *yaffs_FindObjectByName(yaf
+ * Do a real check
+ */
+ yaffs_GetObjectName(l, buffer,
+- YAFFS_MAX_NAME_LENGTH);
++ YAFFS_MAX_NAME_LENGTH + 1);
+ if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
+ return l;
+ }
+@@ -6842,36 +4638,124 @@ yaffs_Object *yaffs_GetEquivalentObject(
+ return obj;
+ }
+
+-int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
+-{
+- memset(name, 0, buffSize * sizeof(YCHAR));
+-
+- yaffs_CheckObjectDetailsLoaded(obj);
++/*
++ * A note or two on object names.
++ * * If the object name is missing, we then make one up in the form objnnn
++ *
++ * * ASCII names are stored in the object header's name field from byte zero
++ * * Unicode names are historically stored starting from byte zero.
++ *
++ * Then there are automatic Unicode names...
++ * The purpose of these is to save names in a way that can be read as
++ * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII
++ * system to share files.
++ *
++ * These automatic unicode are stored slightly differently...
++ * - If the name can fit in the ASCII character space then they are saved as
++ * ascii names as per above.
++ * - If the name needs Unicode then the name is saved in Unicode
++ * starting at oh->name[1].
+
+- if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
+- yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
+- } else if (obj->hdrChunk <= 0) {
++ */
++static void yaffs_FixNullName(yaffs_Object * obj,YCHAR * name, int buffSize)
++{
++ /* Create an object name if we could not find one. */
++ if(yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH) == 0){
+ YCHAR locName[20];
+ YCHAR numString[20];
+ YCHAR *x = &numString[19];
+ unsigned v = obj->objectId;
+ numString[19] = 0;
+- while (v > 0) {
++ while(v>0){
+ x--;
+ *x = '0' + (v % 10);
+ v /= 10;
+ }
+ /* make up a name */
+ yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
+- yaffs_strcat(locName, x);
++ yaffs_strcat(locName,x);
+ yaffs_strncpy(name, locName, buffSize - 1);
++ }
++}
++
++static void yaffs_LoadNameFromObjectHeader(yaffs_Device *dev,YCHAR *name, const YCHAR *ohName, int bufferSize)
++{
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++ if(dev->param.autoUnicode){
++ if(*ohName){
++ /* It is an ASCII name, so do an ASCII to unicode conversion */
++ const char *asciiOhName = (const char *)ohName;
++ int n = bufferSize - 1;
++ while(n > 0 && *asciiOhName){
++ *name = *asciiOhName;
++ name++;
++ asciiOhName++;
++ n--;
++ }
++ } else
++ yaffs_strncpy(name,ohName+1, bufferSize -1);
++ } else
++#endif
++ yaffs_strncpy(name, ohName, bufferSize - 1);
++}
++
++
++static void yaffs_LoadObjectHeaderFromName(yaffs_Device *dev, YCHAR *ohName, const YCHAR *name)
++{
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++
++ int isAscii;
++ YCHAR *w;
+
++ if(dev->param.autoUnicode){
++
++ isAscii = 1;
++ w = name;
++
++ /* Figure out if the name will fit in ascii character set */
++ while(isAscii && *w){
++ if((*w) & 0xff00)
++ isAscii = 0;
++ w++;
++ }
++
++ if(isAscii){
++ /* It is an ASCII name, so do a unicode to ascii conversion */
++ char *asciiOhName = (char *)ohName;
++ int n = YAFFS_MAX_NAME_LENGTH - 1;
++ while(n > 0 && *name){
++ *asciiOhName= *name;
++ name++;
++ asciiOhName++;
++ n--;
++ }
++ } else{
++ /* It is a unicode name, so save starting at the second YCHAR */
++ *ohName = 0;
++ yaffs_strncpy(ohName+1,name, YAFFS_MAX_NAME_LENGTH -2);
++ }
+ }
++ else
++#endif
++ yaffs_strncpy(ohName,name, YAFFS_MAX_NAME_LENGTH - 1);
++
++}
++
++int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize)
++{
++ memset(name, 0, buffSize * sizeof(YCHAR));
++
++ yaffs_CheckObjectDetailsLoaded(obj);
++
++ if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
++ yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
++ }
+ #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
+- else if (obj->shortName[0])
++ else if (obj->shortName[0]) {
+ yaffs_strcpy(name, obj->shortName);
++ }
+ #endif
+- else {
++ else if(obj->hdrChunk > 0) {
+ int result;
+ __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
+
+@@ -6884,14 +4768,17 @@ int yaffs_GetObjectName(yaffs_Object *ob
+ obj->hdrChunk, buffer,
+ NULL);
+ }
+- yaffs_strncpy(name, oh->name, buffSize - 1);
++ yaffs_LoadNameFromObjectHeader(obj->myDev,name,oh->name,buffSize);
+
+ yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
+ }
+
+- return yaffs_strlen(name);
++ yaffs_FixNullName(obj,name,buffSize);
++
++ return yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH);
+ }
+
++
+ int yaffs_GetObjectFileLength(yaffs_Object *obj)
+ {
+ /* Dereference any hard linking */
+@@ -6899,9 +4786,11 @@ int yaffs_GetObjectFileLength(yaffs_Obje
+
+ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+ return obj->variant.fileVariant.fileSize;
+- if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
+- return yaffs_strlen(obj->variant.symLinkVariant.alias);
+- else {
++ if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
++ if(!obj->variant.symLinkVariant.alias)
++ return 0;
++ return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
++ } else {
+ /* Only a directory should drop through to here */
+ return obj->myDev->nDataBytesPerChunk;
+ }
+@@ -6992,7 +4881,7 @@ int yaffs_SetAttributes(yaffs_Object *ob
+ if (valid & ATTR_SIZE)
+ yaffs_ResizeFile(obj, attr->ia_size);
+
+- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
++ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0, NULL);
+
+ return YAFFS_OK;
+
+@@ -7025,12 +4914,129 @@ int yaffs_GetAttributes(yaffs_Object *ob
+
+ #endif
+
++
++static int yaffs_DoXMod(yaffs_Object *obj, int set, const YCHAR *name, const void *value, int size, int flags)
++{
++ yaffs_XAttrMod xmod;
++
++ int result;
++
++ xmod.set = set;
++ xmod.name = name;
++ xmod.data = value;
++ xmod.size = size;
++ xmod.flags = flags;
++ xmod.result = -ENOSPC;
++
++ result = yaffs_UpdateObjectHeader(obj, NULL, 0, 0, 0, &xmod);
++
++ if(result > 0)
++ return xmod.result;
++ else
++ return -ENOSPC;
++}
++
++static int yaffs_ApplyXMod(yaffs_Object *obj, char *buffer, yaffs_XAttrMod *xmod)
++{
++ int retval = 0;
++ int x_offs = sizeof(yaffs_ObjectHeader);
++ yaffs_Device *dev = obj->myDev;
++ int x_size = dev->nDataBytesPerChunk - sizeof(yaffs_ObjectHeader);
++
++ char * x_buffer = buffer + x_offs;
++
++ if(xmod->set)
++ retval = nval_set(x_buffer, x_size, xmod->name, xmod->data, xmod->size, xmod->flags);
++ else
++ retval = nval_del(x_buffer, x_size, xmod->name);
++
++ obj->hasXattr = nval_hasvalues(x_buffer, x_size);
++ obj->xattrKnown = 1;
++
++ xmod->result = retval;
++
++ return retval;
++}
++
++static int yaffs_DoXFetch(yaffs_Object *obj, const YCHAR *name, void *value, int size)
++{
++ char *buffer = NULL;
++ int result;
++ yaffs_ExtendedTags tags;
++ yaffs_Device *dev = obj->myDev;
++ int x_offs = sizeof(yaffs_ObjectHeader);
++ int x_size = dev->nDataBytesPerChunk - sizeof(yaffs_ObjectHeader);
++
++ char * x_buffer;
++
++ int retval = 0;
++
++ if(obj->hdrChunk < 1)
++ return -ENODATA;
++
++ /* If we know that the object has no xattribs then don't do all the
++ * reading and parsing.
++ */
++ if(obj->xattrKnown && !obj->hasXattr){
++ if(name)
++ return -ENODATA;
++ else
++ return 0;
++ }
++
++ buffer = (char *) yaffs_GetTempBuffer(dev, __LINE__);
++ if(!buffer)
++ return -ENOMEM;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev,obj->hdrChunk, (__u8 *)buffer, &tags);
++
++ if(result != YAFFS_OK)
++ retval = -ENOENT;
++ else{
++ x_buffer = buffer + x_offs;
++
++ if (!obj->xattrKnown){
++ obj->hasXattr = nval_hasvalues(x_buffer, x_size);
++ obj->xattrKnown = 1;
++ }
++
++ if(name)
++ retval = nval_get(x_buffer, x_size, name, value, size);
++ else
++ retval = nval_list(x_buffer, x_size, value,size);
++ }
++ yaffs_ReleaseTempBuffer(dev,(__u8 *)buffer,__LINE__);
++ return retval;
++}
++
++int yaffs_SetXAttribute(yaffs_Object *obj, const YCHAR *name, const void * value, int size, int flags)
++{
++ return yaffs_DoXMod(obj, 1, name, value, size, flags);
++}
++
++int yaffs_RemoveXAttribute(yaffs_Object *obj, const YCHAR *name)
++{
++ return yaffs_DoXMod(obj, 0, name, NULL, 0, 0);
++}
++
++int yaffs_GetXAttribute(yaffs_Object *obj, const YCHAR *name, void *value, int size)
++{
++ return yaffs_DoXFetch(obj, name, value, size);
++}
++
++int yaffs_ListXAttributes(yaffs_Object *obj, char *buffer, int size)
++{
++ return yaffs_DoXFetch(obj, NULL, buffer,size);
++}
++
++
++
+ #if 0
+ int yaffs_DumpObject(yaffs_Object *obj)
+ {
+ YCHAR name[257];
+
+- yaffs_GetObjectName(obj, name, 256);
++ yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+@@ -7050,30 +5056,32 @@ static int yaffs_CheckDevFunctions(const
+ {
+
+ /* Common functions, gotta have */
+- if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
++ if (!dev->param.eraseBlockInNAND || !dev->param.initialiseNAND)
+ return 0;
+
+ #ifdef CONFIG_YAFFS_YAFFS2
+
+ /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
+- if (dev->writeChunkWithTagsToNAND &&
+- dev->readChunkWithTagsFromNAND &&
+- !dev->writeChunkToNAND &&
+- !dev->readChunkFromNAND &&
+- dev->markNANDBlockBad && dev->queryNANDBlock)
++ if (dev->param.writeChunkWithTagsToNAND &&
++ dev->param.readChunkWithTagsFromNAND &&
++ !dev->param.writeChunkToNAND &&
++ !dev->param.readChunkFromNAND &&
++ dev->param.markNANDBlockBad &&
++ dev->param.queryNANDBlock)
+ return 1;
+ #endif
+
+ /* Can use the "spare" style interface for yaffs1 */
+- if (!dev->isYaffs2 &&
+- !dev->writeChunkWithTagsToNAND &&
+- !dev->readChunkWithTagsFromNAND &&
+- dev->writeChunkToNAND &&
+- dev->readChunkFromNAND &&
+- !dev->markNANDBlockBad && !dev->queryNANDBlock)
++ if (!dev->param.isYaffs2 &&
++ !dev->param.writeChunkWithTagsToNAND &&
++ !dev->param.readChunkWithTagsFromNAND &&
++ dev->param.writeChunkToNAND &&
++ dev->param.readChunkFromNAND &&
++ !dev->param.markNANDBlockBad &&
++ !dev->param.queryNANDBlock)
+ return 1;
+
+- return 0; /* bad */
++ return 0; /* bad */
+ }
+
+
+@@ -7120,35 +5128,35 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ return YAFFS_FAIL;
+ }
+
+- dev->internalStartBlock = dev->startBlock;
+- dev->internalEndBlock = dev->endBlock;
++ dev->internalStartBlock = dev->param.startBlock;
++ dev->internalEndBlock = dev->param.endBlock;
+ dev->blockOffset = 0;
+ dev->chunkOffset = 0;
+ dev->nFreeChunks = 0;
+
+- dev->gcBlock = -1;
++ dev->gcBlock = 0;
+
+- if (dev->startBlock == 0) {
+- dev->internalStartBlock = dev->startBlock + 1;
+- dev->internalEndBlock = dev->endBlock + 1;
++ if (dev->param.startBlock == 0) {
++ dev->internalStartBlock = dev->param.startBlock + 1;
++ dev->internalEndBlock = dev->param.endBlock + 1;
+ dev->blockOffset = 1;
+- dev->chunkOffset = dev->nChunksPerBlock;
++ dev->chunkOffset = dev->param.nChunksPerBlock;
+ }
+
+ /* Check geometry parameters. */
+
+- if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
+- (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
+- (dev->inbandTags && !dev->isYaffs2) ||
+- dev->nChunksPerBlock < 2 ||
+- dev->nReservedBlocks < 2 ||
++ if ((!dev->param.inbandTags && dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 1024) ||
++ (!dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 512) ||
++ (dev->param.inbandTags && !dev->param.isYaffs2) ||
++ dev->param.nChunksPerBlock < 2 ||
++ dev->param.nReservedBlocks < 2 ||
+ dev->internalStartBlock <= 0 ||
+ dev->internalEndBlock <= 0 ||
+- dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
++ dev->internalEndBlock <= (dev->internalStartBlock + dev->param.nReservedBlocks + 2)) { /* otherwise it is too small */
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
+- TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
++ TENDSTR), dev->param.totalBytesPerChunk, dev->param.isYaffs2 ? "2" : "", dev->param.inbandTags));
+ return YAFFS_FAIL;
+ }
+
+@@ -7159,10 +5167,10 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ }
+
+ /* Sort out space for inband tags, if required */
+- if (dev->inbandTags)
+- dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
++ if (dev->param.inbandTags)
++ dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
+ else
+- dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
++ dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk;
+
+ /* Got the right mix of functions? */
+ if (!yaffs_CheckDevFunctions(dev)) {
+@@ -7209,12 +5217,12 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ * We need to find the next power of 2 > than internalEndBlock
+ */
+
+- x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
++ x = dev->param.nChunksPerBlock * (dev->internalEndBlock + 1);
+
+ bits = ShiftsGE(x);
+
+ /* Set up tnode width if wide tnodes are enabled. */
+- if (!dev->wideTnodesDisabled) {
++ if (!dev->param.wideTnodesDisabled) {
+ /* bits must be even so that we end up with 32-bit words */
+ if (bits & 1)
+ bits++;
+@@ -7238,10 +5246,13 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ else
+ dev->chunkGroupBits = bits - dev->tnodeWidth;
+
++ dev->tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
++ if(dev->tnodeSize < sizeof(yaffs_Tnode))
++ dev->tnodeSize = sizeof(yaffs_Tnode);
+
+ dev->chunkGroupSize = 1 << dev->chunkGroupBits;
+
+- if (dev->nChunksPerBlock < dev->chunkGroupSize) {
++ if (dev->param.nChunksPerBlock < dev->chunkGroupSize) {
+ /* We have a problem because the soft delete won't work if
+ * the chunk group size > chunks per block.
+ * This can be remedied by using larger "virtual blocks".
+@@ -7255,9 +5266,11 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ /* OK, we've finished verifying the device, lets continue with initialisation */
+
+ /* More device initialisation */
+- dev->garbageCollections = 0;
+- dev->passiveGarbageCollections = 0;
+- dev->currentDirtyChecker = 0;
++ dev->allGCs = 0;
++ dev->passiveGCs = 0;
++ dev->oldestDirtyGCs = 0;
++ dev->backgroundGCs = 0;
++ dev->gcBlockFinder = 0;
+ dev->bufferedBlock = -1;
+ dev->doingBufferedBlockRewrite = 0;
+ dev->nDeletedFiles = 0;
+@@ -7269,8 +5282,11 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ dev->tagsEccUnfixed = 0;
+ dev->nErasureFailures = 0;
+ dev->nErasedBlocks = 0;
+- dev->isDoingGC = 0;
++ dev->gcDisable= 0;
+ dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
++ YINIT_LIST_HEAD(&dev->dirtyDirectories);
++ dev->oldestDirtySequence = 0;
++ dev->oldestDirtyBlock = 0;
+
+ /* Initialise temporary buffers and caches. */
+ if (!yaffs_InitialiseTempBuffers(dev))
+@@ -7281,13 +5297,13 @@ int yaffs_GutsInitialise(yaffs_Device *d
+
+
+ if (!init_failed &&
+- dev->nShortOpCaches > 0) {
++ dev->param.nShortOpCaches > 0) {
+ int i;
+ void *buf;
+- int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
++ int srCacheBytes = dev->param.nShortOpCaches * sizeof(yaffs_ChunkCache);
+
+- if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
+- dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
++ if (dev->param.nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
++ dev->param.nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
+
+ dev->srCache = YMALLOC(srCacheBytes);
+
+@@ -7296,11 +5312,11 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ if (dev->srCache)
+ memset(dev->srCache, 0, srCacheBytes);
+
+- for (i = 0; i < dev->nShortOpCaches && buf; i++) {
++ for (i = 0; i < dev->param.nShortOpCaches && buf; i++) {
+ dev->srCache[i].object = NULL;
+ dev->srCache[i].lastUse = 0;
+ dev->srCache[i].dirty = 0;
+- dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
++ dev->srCache[i].data = buf = YMALLOC_DMA(dev->param.totalBytesPerChunk);
+ }
+ if (!buf)
+ init_failed = 1;
+@@ -7311,19 +5327,18 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ dev->cacheHits = 0;
+
+ if (!init_failed) {
+- dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
++ dev->gcCleanupList = YMALLOC(dev->param.nChunksPerBlock * sizeof(__u32));
+ if (!dev->gcCleanupList)
+ init_failed = 1;
+ }
+
+- if (dev->isYaffs2)
+- dev->useHeaderFileSize = 1;
++ if (dev->param.isYaffs2)
++ dev->param.useHeaderFileSize = 1;
+
+ if (!init_failed && !yaffs_InitialiseBlocks(dev))
+ init_failed = 1;
+
+- yaffs_InitialiseTnodes(dev);
+- yaffs_InitialiseObjects(dev);
++ yaffs_InitialiseTnodesAndObjects(dev);
+
+ if (!init_failed && !yaffs_CreateInitialDirectories(dev))
+ init_failed = 1;
+@@ -7331,8 +5346,8 @@ int yaffs_GutsInitialise(yaffs_Device *d
+
+ if (!init_failed) {
+ /* Now scan the flash. */
+- if (dev->isYaffs2) {
+- if (yaffs_CheckpointRestore(dev)) {
++ if (dev->param.isYaffs2) {
++ if (yaffs2_CheckpointRestore(dev)) {
+ yaffs_CheckObjectDetailsLoaded(dev->rootDir);
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: restored from checkpoint" TENDSTR)));
+@@ -7342,9 +5357,8 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ * and scan backwards.
+ */
+ yaffs_DeinitialiseBlocks(dev);
+- yaffs_DeinitialiseTnodes(dev);
+- yaffs_DeinitialiseObjects(dev);
+
++ yaffs_DeinitialiseTnodesAndObjects(dev);
+
+ dev->nErasedBlocks = 0;
+ dev->nFreeChunks = 0;
+@@ -7353,24 +5367,25 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ dev->nDeletedFiles = 0;
+ dev->nUnlinkedFiles = 0;
+ dev->nBackgroundDeletions = 0;
+- dev->oldestDirtySequence = 0;
+
+ if (!init_failed && !yaffs_InitialiseBlocks(dev))
+ init_failed = 1;
+
+- yaffs_InitialiseTnodes(dev);
+- yaffs_InitialiseObjects(dev);
++ yaffs_InitialiseTnodesAndObjects(dev);
+
+ if (!init_failed && !yaffs_CreateInitialDirectories(dev))
+ init_failed = 1;
+
+- if (!init_failed && !yaffs_ScanBackwards(dev))
++ if (!init_failed && !yaffs2_ScanBackwards(dev))
+ init_failed = 1;
+ }
+- } else if (!yaffs_Scan(dev))
++ } else if (!yaffs1_Scan(dev))
+ init_failed = 1;
+
+ yaffs_StripDeletedObjects(dev);
++ yaffs_FixHangingObjects(dev);
++ if(dev->param.emptyLostAndFound)
++ yaffs_EmptyLostAndFound(dev);
+ }
+
+ if (init_failed) {
+@@ -7394,6 +5409,9 @@ int yaffs_GutsInitialise(yaffs_Device *d
+ yaffs_VerifyFreeChunks(dev);
+ yaffs_VerifyBlocks(dev);
+
++ /* Clean up any aborted checkpoint data */
++ if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
++ yaffs2_InvalidateCheckpoint(dev);
+
+ T(YAFFS_TRACE_TRACING,
+ (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
+@@ -7407,12 +5425,11 @@ void yaffs_Deinitialise(yaffs_Device *de
+ int i;
+
+ yaffs_DeinitialiseBlocks(dev);
+- yaffs_DeinitialiseTnodes(dev);
+- yaffs_DeinitialiseObjects(dev);
+- if (dev->nShortOpCaches > 0 &&
++ yaffs_DeinitialiseTnodesAndObjects(dev);
++ if (dev->param.nShortOpCaches > 0 &&
+ dev->srCache) {
+
+- for (i = 0; i < dev->nShortOpCaches; i++) {
++ for (i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].data)
+ YFREE(dev->srCache[i].data);
+ dev->srCache[i].data = NULL;
+@@ -7429,34 +5446,33 @@ void yaffs_Deinitialise(yaffs_Device *de
+
+ dev->isMounted = 0;
+
+- if (dev->deinitialiseNAND)
+- dev->deinitialiseNAND(dev);
++ if (dev->param.deinitialiseNAND)
++ dev->param.deinitialiseNAND(dev);
+ }
+ }
+
+-static int yaffs_CountFreeChunks(yaffs_Device *dev)
++int yaffs_CountFreeChunks(yaffs_Device *dev)
+ {
+- int nFree;
++ int nFree=0;
+ int b;
+
+ yaffs_BlockInfo *blk;
+
+- for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
+- b++) {
+- blk = yaffs_GetBlockInfo(dev, b);
+-
++ blk = dev->blockInfo;
++ for (b = dev->internalStartBlock; b <= dev->internalEndBlock; b++) {
+ switch (blk->blockState) {
+ case YAFFS_BLOCK_STATE_EMPTY:
+ case YAFFS_BLOCK_STATE_ALLOCATING:
+ case YAFFS_BLOCK_STATE_COLLECTING:
+ case YAFFS_BLOCK_STATE_FULL:
+ nFree +=
+- (dev->nChunksPerBlock - blk->pagesInUse +
++ (dev->param.nChunksPerBlock - blk->pagesInUse +
+ blk->softDeletions);
+ break;
+ default:
+ break;
+ }
++ blk++;
+ }
+
+ return nFree;
+@@ -7481,21 +5497,19 @@ int yaffs_GetNumberOfFreeChunks(yaffs_De
+
+ /* Now count the number of dirty chunks in the cache and subtract those */
+
+- for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
++ for (nDirtyCacheChunks = 0, i = 0; i < dev->param.nShortOpCaches; i++) {
+ if (dev->srCache[i].dirty)
+ nDirtyCacheChunks++;
+ }
+
+ nFree -= nDirtyCacheChunks;
+
+- nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
++ nFree -= ((dev->param.nReservedBlocks + 1) * dev->param.nChunksPerBlock);
+
+ /* Now we figure out how much to reserve for the checkpoint and report that... */
+- blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
+- if (blocksForCheckpoint < 0)
+- blocksForCheckpoint = 0;
++ blocksForCheckpoint = yaffs2_CalcCheckpointBlocksRequired(dev);
+
+- nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
++ nFree -= (blocksForCheckpoint * dev->param.nChunksPerBlock);
+
+ if (nFree < 0)
+ nFree = 0;
+@@ -7504,27 +5518,6 @@ int yaffs_GetNumberOfFreeChunks(yaffs_De
+
+ }
+
+-static int yaffs_freeVerificationFailures;
+-
+-static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
+-{
+- int counted;
+- int difference;
+-
+- if (yaffs_SkipVerification(dev))
+- return;
+-
+- counted = yaffs_CountFreeChunks(dev);
+-
+- difference = dev->nFreeChunks - counted;
+-
+- if (difference) {
+- T(YAFFS_TRACE_ALWAYS,
+- (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
+- dev->nFreeChunks, counted, difference));
+- yaffs_freeVerificationFailures++;
+- }
+-}
+
+ /*---------------------------------------- YAFFS test code ----------------------*/
+
+@@ -7532,7 +5525,7 @@ static void yaffs_VerifyFreeChunks(yaffs
+ do { \
+ if (sizeof(structure) != syze) { \
+ T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
+- name, syze, sizeof(structure))); \
++ name, syze, (int) sizeof(structure))); \
+ return YAFFS_FAIL; \
+ } \
+ } while (0)
+@@ -7542,9 +5535,8 @@ static int yaffs_CheckStructures(void)
+ /* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
+ /* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
+ /* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
+-#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
+-#endif
++/* yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode"); */
++
+ #ifndef CONFIG_YAFFS_WINCE
+ yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");
+ #endif
+diff -Nrup a/fs/yaffs2/yaffs_guts.h b/fs/yaffs2/yaffs_guts.h
+--- a/fs/yaffs2/yaffs_guts.h 2010-10-03 17:48:22.718000363 +0300
++++ b/fs/yaffs2/yaffs_guts.h 2010-10-03 18:03:47.542000362 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -16,8 +16,9 @@
+ #ifndef __YAFFS_GUTS_H__
+ #define __YAFFS_GUTS_H__
+
+-#include "devextras.h"
+ #include "yportenv.h"
++#include "devextras.h"
++#include "yaffs_list.h"
+
+ #define YAFFS_OK 1
+ #define YAFFS_FAIL 0
+@@ -52,7 +53,6 @@
+
+ #define YAFFS_MAX_CHUNK_ID 0x000FFFFF
+
+-#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF
+
+ #define YAFFS_ALLOCATION_NOBJECTS 100
+ #define YAFFS_ALLOCATION_NTNODES 100
+@@ -62,8 +62,9 @@
+
+
+ #define YAFFS_OBJECT_SPACE 0x40000
++#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE -1)
+
+-#define YAFFS_CHECKPOINT_VERSION 3
++#define YAFFS_CHECKPOINT_VERSION 4
+
+ #ifdef CONFIG_YAFFS_UNICODE
+ #define YAFFS_MAX_NAME_LENGTH 127
+@@ -81,12 +82,11 @@
+ #define YAFFS_OBJECTID_UNLINKED 3
+ #define YAFFS_OBJECTID_DELETED 4
+
+-/* Sseudo object ids for checkpointing */
++/* Pseudo object ids for checkpointing */
+ #define YAFFS_OBJECTID_SB_HEADER 0x10
+ #define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20
+ #define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21
+
+-/* */
+
+ #define YAFFS_MAX_SHORT_OP_CACHES 20
+
+@@ -119,11 +119,7 @@ typedef struct {
+ int dirty;
+ int nBytes; /* Only valid if the cache is dirty */
+ int locked; /* Can't push out or flush while locked. */
+-#ifdef CONFIG_YAFFS_YAFFS2
+ __u8 *data;
+-#else
+- __u8 data[YAFFS_BYTES_PER_CHUNK];
+-#endif
+ } yaffs_ChunkCache;
+
+
+@@ -234,6 +230,8 @@ typedef enum {
+ YAFFS_BLOCK_STATE_UNKNOWN = 0,
+
+ YAFFS_BLOCK_STATE_SCANNING,
++ /* Being scanned */
++
+ YAFFS_BLOCK_STATE_NEEDS_SCANNING,
+ /* The block might have something on it (ie it is allocating or full, perhaps empty)
+ * but it needs to be scanned to determine its true state.
+@@ -249,21 +247,23 @@ typedef enum {
+ /* This block is partially allocated.
+ * At least one page holds valid data.
+ * This is the one currently being used for page
+- * allocation. Should never be more than one of these
++ * allocation. Should never be more than one of these.
++ * If a block is only partially allocated at mount it is treated as full.
+ */
+
+ YAFFS_BLOCK_STATE_FULL,
+ /* All the pages in this block have been allocated.
++ * If a block was only partially allocated when mounted we treat
++ * it as fully allocated.
+ */
+
+ YAFFS_BLOCK_STATE_DIRTY,
+- /* All pages have been allocated and deleted.
++ /* The block was full and now all chunks have been deleted.
+ * Erase me, reuse me.
+ */
+
+ YAFFS_BLOCK_STATE_CHECKPOINT,
+- /* This block is assigned to holding checkpoint data.
+- */
++ /* This block is assigned to holding checkpoint data. */
+
+ YAFFS_BLOCK_STATE_COLLECTING,
+ /* This block is being garbage collected */
+@@ -351,23 +351,12 @@ typedef struct {
+ /*--------------------------- Tnode -------------------------- */
+
+ union yaffs_Tnode_union {
+-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+- union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1];
+-#else
+ union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL];
+-#endif
+-/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */
+
+ };
+
+ typedef union yaffs_Tnode_union yaffs_Tnode;
+
+-struct yaffs_TnodeList_struct {
+- struct yaffs_TnodeList_struct *next;
+- yaffs_Tnode *tnodes;
+-};
+-
+-typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
+
+ /*------------------------ Object -----------------------------*/
+ /* An object can be one of:
+@@ -387,6 +376,7 @@ typedef struct {
+
+ typedef struct {
+ struct ylist_head children; /* list of child links */
++ struct ylist_head dirty; /* Entry for list of dirty directories */
+ } yaffs_DirectoryStructure;
+
+ typedef struct {
+@@ -405,6 +395,8 @@ typedef union {
+ yaffs_HardLinkStructure hardLinkVariant;
+ } yaffs_ObjectVariant;
+
++
++
+ struct yaffs_ObjectStruct {
+ __u8 deleted:1; /* This should only apply to unlinked files. */
+ __u8 softDeleted:1; /* it has also been soft deleted */
+@@ -424,6 +416,10 @@ struct yaffs_ObjectStruct {
+ * until the inode is released.
+ */
+ __u8 beingCreated:1; /* This object is still being created so skip some checks. */
++ __u8 isShadowed:1; /* This object is shadowed on the way to being renamed. */
++
++ __u8 xattrKnown:1; /* We know if this has object has xattribs or not. */
++ __u8 hasXattr:1; /* This object has xattribs. Valid if xattrKnown. */
+
+ __u8 serial; /* serial number of chunk in NAND. Cached here */
+ __u16 sum; /* sum of the name to speed searching */
+@@ -452,10 +448,6 @@ struct yaffs_ObjectStruct {
+ YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1];
+ #endif
+
+-#ifndef __KERNEL__
+- __u32 inUse;
+-#endif
+-
+ #ifdef CONFIG_YAFFS_WINCE
+ __u32 win_ctime[2];
+ __u32 win_mtime[2];
+@@ -470,10 +462,7 @@ struct yaffs_ObjectStruct {
+
+ __u32 yst_rdev;
+
+-#ifdef __KERNEL__
+- struct inode *myInode;
+-
+-#endif
++ void *myInode;
+
+ yaffs_ObjectType variantType;
+
+@@ -483,13 +472,6 @@ struct yaffs_ObjectStruct {
+
+ typedef struct yaffs_ObjectStruct yaffs_Object;
+
+-struct yaffs_ObjectList_struct {
+- yaffs_Object *objects;
+- struct yaffs_ObjectList_struct *next;
+-};
+-
+-typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
+-
+ typedef struct {
+ struct ylist_head list;
+ int count;
+@@ -531,12 +513,18 @@ typedef struct {
+
+ /*----------------- Device ---------------------------------*/
+
+-struct yaffs_DeviceStruct {
+- struct ylist_head devList;
+- const char *name;
+
+- /* Entry parameters set up way early. Yaffs sets up the rest.*/
+- int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */
++struct yaffs_DeviceParamStruct {
++ const YCHAR *name;
++
++ /*
++ * Entry parameters set up way early. Yaffs sets up the rest.
++ * The structure should be zeroed out before use so that unused
++ * and defualt values are zero.
++ */
++
++ int inbandTags; /* Use unband tags */
++ __u32 totalBytesPerChunk; /* Should be >= 512, does not need to be a power of 2 */
+ int nChunksPerBlock; /* does not need to be a power of 2 */
+ int spareBytesPerChunk; /* spare area size */
+ int startBlock; /* Start block we're allowed to use */
+@@ -545,24 +533,24 @@ struct yaffs_DeviceStruct {
+ /* reserved blocks on NOR and RAM. */
+
+
+- /* Stuff used by the shared space checkpointing mechanism */
+- /* If this value is zero, then this mechanism is disabled */
+-
+-/* int nCheckpointReservedBlocks; */ /* Blocks to reserve for checkpoint data */
+-
+-
+ int nShortOpCaches; /* If <= 0, then short op caching is disabled, else
+- * the number of short op caches (don't use too many)
++ * the number of short op caches (don't use too many).
++ * 10 to 20 is a good bet.
+ */
++ int useNANDECC; /* Flag to decide whether or not to use NANDECC on data (yaffs1) */
++ int noTagsECC; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */
+
+- int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
++ int isYaffs2; /* Use yaffs2 mode on this device */
+
+- int useNANDECC; /* Flag to decide whether or not to use NANDECC */
++ int emptyLostAndFound; /* Auto-empty lost+found directory on mount */
+
+- void *genericDevice; /* Pointer to device context
+- * On an mtd this holds the mtd pointer.
+- */
+- void *superBlock;
++ int refreshPeriod; /* How often we should check to do a block refresh */
++
++ /* Checkpoint control. Can be set before or after initialisation */
++ __u8 skipCheckpointRead;
++ __u8 skipCheckpointWrite;
++
++ int enableXattr; /* Enable xattribs */
+
+ /* NAND access functions (Must be set before calling YAFFS)*/
+
+@@ -589,58 +577,68 @@ struct yaffs_DeviceStruct {
+ yaffs_BlockState *state, __u32 *sequenceNumber);
+ #endif
+
+- int isYaffs2;
+-
+ /* The removeObjectCallback function must be supplied by OS flavours that
+- * need it. The Linux kernel does not use this, but yaffs direct does use
+- * it to implement the faster readdir
++ * need it.
++ * yaffs direct uses it to implement the faster readdir.
++ * Linux uses it to protect the directory during unlocking.
+ */
+ void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj);
+
+- /* Callback to mark the superblock dirsty */
+- void (*markSuperBlockDirty)(void *superblock);
++ /* Callback to mark the superblock dirty */
++ void (*markSuperBlockDirty)(struct yaffs_DeviceStruct *dev);
++
++ /* Callback to control garbage collection. */
++ unsigned (*gcControl)(struct yaffs_DeviceStruct *dev);
+
++ /* Debug control flags. Don't use unless you know what you're doing */
++ int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */
++ int disableLazyLoad; /* Disable lazy loading on this device */
+ int wideTnodesDisabled; /* Set to disable wide tnodes */
++ int disableSoftDelete; /* yaffs 1 only: Set to disable the use of softdeletion. */
++
++ int deferDirectoryUpdate; /* Set to defer directory updates */
++
++#ifdef CONFIG_YAFFS_AUTO_UNICODE
++ int autoUnicode;
++#endif
++ int alwaysCheckErased; /* Force chunk erased check always on */
++};
+
+- YCHAR *pathDividers; /* String of legal path dividers */
++typedef struct yaffs_DeviceParamStruct yaffs_DeviceParam;
+
++struct yaffs_DeviceStruct {
++ struct yaffs_DeviceParamStruct param;
+
+- /* End of stuff that must be set before initialisation. */
++ /* Context storage. Holds extra OS specific data for this device */
+
+- /* Checkpoint control. Can be set before or after initialisation */
+- __u8 skipCheckpointRead;
+- __u8 skipCheckpointWrite;
++ void *osContext;
++ void *driverContext;
++
++ struct ylist_head devList;
+
+ /* Runtime parameters. Set up by YAFFS. */
++ int nDataBytesPerChunk;
+
+- __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */
++ /* Non-wide tnode stuff */
++ __u16 chunkGroupBits; /* Number of bits that need to be resolved if
++ * the tnodes are not wide enough.
++ */
+ __u16 chunkGroupSize; /* == 2^^chunkGroupBits */
+
+ /* Stuff to support wide tnodes */
+ __u32 tnodeWidth;
+ __u32 tnodeMask;
++ __u32 tnodeSize;
+
+ /* Stuff for figuring out file offset to chunk conversions */
+ __u32 chunkShift; /* Shift value */
+ __u32 chunkDiv; /* Divisor after shifting: 1 for power-of-2 sizes */
+ __u32 chunkMask; /* Mask to use for power-of-2 case */
+
+- /* Stuff to handle inband tags */
+- int inbandTags;
+- __u32 totalBytesPerChunk;
+-
+-#ifdef __KERNEL__
+-
+- struct semaphore sem; /* Semaphore for waiting on erasure.*/
+- struct semaphore grossLock; /* Gross locking semaphore */
+- __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
+- * at compile time so we have to allocate it.
+- */
+- void (*putSuperFunc) (struct super_block *sb);
+-#endif
+
+- int isMounted;
+
++ int isMounted;
++ int readOnly;
+ int isCheckpointed;
+
+
+@@ -682,51 +680,31 @@ struct yaffs_DeviceStruct {
+ __u32 allocationPage;
+ int allocationBlockFinder; /* Used to search for next allocation block */
+
+- /* Runtime state */
+- int nTnodesCreated;
+- yaffs_Tnode *freeTnodes;
+- int nFreeTnodes;
+- yaffs_TnodeList *allocatedTnodeList;
+-
+- int isDoingGC;
+- int gcBlock;
+- int gcChunk;
+-
+- int nObjectsCreated;
+- yaffs_Object *freeObjects;
+- int nFreeObjects;
++ /* Object and Tnode memory management */
++ void *allocator;
++ int nObjects;
++ int nTnodes;
+
+ int nHardLinks;
+
+- yaffs_ObjectList *allocatedObjectList;
+-
+ yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS];
++ __u32 bucketFinder;
+
+ int nFreeChunks;
+
+- int currentDirtyChecker; /* Used to find current dirtiest block */
+-
++ /* Garbage collection control */
+ __u32 *gcCleanupList; /* objects to delete at the end of a GC. */
+- int nonAggressiveSkip; /* GC state/mode */
++ __u32 nCleanups;
+
+- /* Statistcs */
+- int nPageWrites;
+- int nPageReads;
+- int nBlockErasures;
+- int nErasureFailures;
+- int nGCCopies;
+- int garbageCollections;
+- int passiveGarbageCollections;
+- int nRetriedWrites;
+- int nRetiredBlocks;
+- int eccFixed;
+- int eccUnfixed;
+- int tagsEccFixed;
+- int tagsEccUnfixed;
+- int nDeletions;
+- int nUnmarkedDeletions;
+-
+- int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
++ unsigned hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */
++ unsigned gcDisable;
++ unsigned gcBlockFinder;
++ unsigned gcDirtiest;
++ unsigned gcPagesInUse;
++ unsigned gcNotDone;
++ unsigned gcBlock;
++ unsigned gcChunk;
++ unsigned gcSkip;
+
+ /* Special directories */
+ yaffs_Object *rootDir;
+@@ -743,8 +721,6 @@ struct yaffs_DeviceStruct {
+ yaffs_ChunkCache *srCache;
+ int srLastUse;
+
+- int cacheHits;
+-
+ /* Stuff for background deletion and unlinked files.*/
+ yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */
+ yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */
+@@ -753,7 +729,6 @@ struct yaffs_DeviceStruct {
+ int nUnlinkedFiles; /* Count of unlinked files. */
+ int nBackgroundDeletions; /* Count of background deletions. */
+
+-
+ /* Temporary buffer management */
+ yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS];
+ int maxTemp;
+@@ -764,6 +739,36 @@ struct yaffs_DeviceStruct {
+ /* yaffs2 runtime stuff */
+ unsigned sequenceNumber; /* Sequence number of currently allocating block */
+ unsigned oldestDirtySequence;
++ unsigned oldestDirtyBlock;
++
++ /* Block refreshing */
++ int refreshSkip; /* A skip down counter. Refresh happens when this gets to zero. */
++
++ /* Dirty directory handling */
++ struct ylist_head dirtyDirectories; /* List of dirty directories */
++
++
++ /* Statistcs */
++ __u32 nPageWrites;
++ __u32 nPageReads;
++ __u32 nBlockErasures;
++ __u32 nErasureFailures;
++ __u32 nGCCopies;
++ __u32 allGCs;
++ __u32 passiveGCs;
++ __u32 oldestDirtyGCs;
++ __u32 nGCBlocks;
++ __u32 backgroundGCs;
++ __u32 nRetriedWrites;
++ __u32 nRetiredBlocks;
++ __u32 eccFixed;
++ __u32 eccUnfixed;
++ __u32 tagsEccFixed;
++ __u32 tagsEccUnfixed;
++ __u32 nDeletions;
++ __u32 nUnmarkedDeletions;
++ __u32 refreshCount;
++ __u32 cacheHits;
+
+ };
+
+@@ -796,7 +801,6 @@ typedef struct {
+
+ /* yaffs2 runtime stuff */
+ unsigned sequenceNumber; /* Sequence number of currently allocating block */
+- unsigned oldestDirtySequence;
+
+ } yaffs_CheckpointDevice;
+
+@@ -809,6 +813,23 @@ typedef struct {
+ } yaffs_CheckpointValidity;
+
+
++struct yaffs_ShadowFixerStruct {
++ int objectId;
++ int shadowedId;
++ struct yaffs_ShadowFixerStruct *next;
++};
++
++/* Structure for doing xattr modifications */
++typedef struct {
++ int set; /* If 0 then this is a deletion */
++ const YCHAR *name;
++ const void *data;
++ int size;
++ int flags;
++ int result;
++}yaffs_XAttrMod;
++
++
+ /*----------------------- YAFFS Functions -----------------------*/
+
+ int yaffs_GutsInitialise(yaffs_Device *dev);
+@@ -840,7 +861,8 @@ int yaffs_ResizeFile(yaffs_Object *obj,
+
+ yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid);
+-int yaffs_FlushFile(yaffs_Object *obj, int updateTime);
++
++int yaffs_FlushFile(yaffs_Object *obj, int updateTime, int dataSync);
+
+ /* Flushing and checkpointing */
+ void yaffs_FlushEntireDeviceCache(yaffs_Device *dev);
+@@ -873,6 +895,12 @@ YCHAR *yaffs_GetSymlinkAlias(yaffs_Objec
+ yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
+ __u32 mode, __u32 uid, __u32 gid, __u32 rdev);
+
++
++int yaffs_SetXAttribute(yaffs_Object *obj, const YCHAR *name, const void * value, int size, int flags);
++int yaffs_GetXAttribute(yaffs_Object *obj, const YCHAR *name, void *value, int size);
++int yaffs_ListXAttributes(yaffs_Object *obj, char *buffer, int size);
++int yaffs_RemoveXAttribute(yaffs_Object *obj, const YCHAR *name);
++
+ /* Special directories */
+ yaffs_Object *yaffs_Root(yaffs_Device *dev);
+ yaffs_Object *yaffs_LostNFound(yaffs_Device *dev);
+@@ -882,18 +910,18 @@ yaffs_Object *yaffs_LostNFound(yaffs_Dev
+ void yfsd_WinFileTimeNow(__u32 target[2]);
+ #endif
+
+-#ifdef __KERNEL__
+-
+ void yaffs_HandleDeferedFree(yaffs_Object *obj);
+-#endif
++
++void yaffs_UpdateDirtyDirectories(yaffs_Device *dev);
++
++int yaffs_BackgroundGarbageCollect(yaffs_Device *dev, unsigned urgency);
+
+ /* Debug dump */
+ int yaffs_DumpObject(yaffs_Object *obj);
+
+ void yaffs_GutsTest(yaffs_Device *dev);
+
+-/* A few useful functions */
+-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags);
++/* A few useful functions to be used within the core files*/
+ void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn);
+ int yaffs_CheckFF(__u8 *buffer, int nBytes);
+ void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi);
+@@ -901,4 +929,41 @@ void yaffs_HandleChunkError(yaffs_Device
+ __u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo);
+ void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
+
++yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
++ int number,
++ yaffs_ObjectType type);
++int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
++ int chunkInNAND, int inScan);
++void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name);
++void yaffs_SetObjectNameFromOH(yaffs_Object *obj, const yaffs_ObjectHeader *oh);
++void yaffs_AddObjectToDirectory(yaffs_Object *directory,
++ yaffs_Object *obj);
++YCHAR *yaffs_CloneString(const YCHAR *str);
++void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
++void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo);
++int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
++ int force, int isShrink, int shadows,
++ yaffs_XAttrMod *xop);
++void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
++ int backwardScanning);
++int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks);
++yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev);
++yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId,
++ yaffs_Tnode *passedTn);
++
++int yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
++ int nBytes, int writeThrough);
++void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize);
++void yaffs_SkipRestOfBlock(yaffs_Device *dev);
++
++int yaffs_CountFreeChunks(yaffs_Device *dev);
++
++yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
++ yaffs_FileStructure *fStruct,
++ __u32 chunkId);
++
++__u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos);
++
+ #endif
+diff -Nrup a/fs/yaffs2/yaffsinterface.h b/fs/yaffs2/yaffsinterface.h
+--- a/fs/yaffs2/yaffsinterface.h 2010-10-03 17:29:32.916000361 +0300
++++ b/fs/yaffs2/yaffsinterface.h 2010-10-03 18:03:47.543000365 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_linux_allocator.c b/fs/yaffs2/yaffs_linux_allocator.c
+--- a/fs/yaffs2/yaffs_linux_allocator.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_linux_allocator.c 2010-10-03 18:03:47.519000366 +0300
+@@ -0,0 +1,200 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ *
++ * Note: Tis code is currently unused. Being checked in in case it becomes useful.
++ */
++
++
++#include "yaffs_allocator.h"
++#include "yaffs_guts.h"
++#include "yaffs_trace.h"
++#include "yportenv.h"
++#include "yaffs_linux.h"
++/*
++ * Start out with the same allocator as yaffs direct.
++ * Todo: Change to Linux slab allocator.
++ */
++
++
++
++#define NAMELEN 20
++struct yaffs_AllocatorStruct {
++ char tnode_name[NAMELEN+1];
++ char object_name[NAMELEN+1];
++ struct kmem_cache *tnode_cache;
++ struct kmem_cache *object_cache;
++};
++
++typedef struct yaffs_AllocatorStruct yaffs_Allocator;
++
++int mount_id;
++
++void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
++
++ T(YAFFS_TRACE_ALLOCATE,(TSTR("Deinitialising yaffs allocator\n")));
++
++ if(allocator){
++ if(allocator->tnode_cache){
++ kmem_cache_destroy(allocator->tnode_cache);
++ allocator->tnode_cache = NULL;
++ } else {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("NULL tnode cache\n")));
++ YBUG();
++ }
++
++ if(allocator->object_cache){
++ kmem_cache_destroy(allocator->object_cache);
++ allocator->object_cache = NULL;
++ } else {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("NULL object cache\n")));
++ YBUG();
++ }
++
++ YFREE(allocator);
++
++ } else {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("Deinitialising NULL allocator\n")));
++ YBUG();
++ }
++ dev->allocator = NULL;
++}
++
++
++static void fake_ctor0(void *data){data = data;}
++static void fake_ctor1(void *data){data = data;}
++static void fake_ctor2(void *data){data = data;}
++static void fake_ctor3(void *data){data = data;}
++static void fake_ctor4(void *data){data = data;}
++static void fake_ctor5(void *data){data = data;}
++static void fake_ctor6(void *data){data = data;}
++static void fake_ctor7(void *data){data = data;}
++static void fake_ctor8(void *data){data = data;}
++static void fake_ctor9(void *data){data = data;}
++
++static void (*fake_ctor_list[10]) (void *) = {
++ fake_ctor0,
++ fake_ctor1,
++ fake_ctor2,
++ fake_ctor3,
++ fake_ctor4,
++ fake_ctor5,
++ fake_ctor6,
++ fake_ctor7,
++ fake_ctor8,
++ fake_ctor9,
++};
++
++void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator;
++ unsigned mount_id = yaffs_DeviceToLC(dev)->mount_id;
++
++ T(YAFFS_TRACE_ALLOCATE,(TSTR("Initialising yaffs allocator\n")));
++
++ if(dev->allocator)
++ YBUG();
++ else if(mount_id >= 10){
++ T(YAFFS_TRACE_ALWAYS,(TSTR("Bad mount_id %u\n"),mount_id));
++ } else {
++ allocator = YMALLOC(sizeof(yaffs_Allocator));
++ memset(allocator,0,sizeof(yaffs_Allocator));
++ dev->allocator = allocator;
++
++ if(!dev->allocator){
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs allocator creation failed\n")));
++ YBUG();
++ return;
++
++ }
++
++ sprintf(allocator->tnode_name,"yaffs_t_%u",mount_id);
++ sprintf(allocator->object_name,"yaffs_o_%u",mount_id);
++
++ allocator->tnode_cache =
++ kmem_cache_create(allocator->tnode_name,
++ dev->tnodeSize,
++ 0, 0,
++ fake_ctor_list[mount_id]);
++ if(allocator->tnode_cache)
++ T(YAFFS_TRACE_ALLOCATE,
++ (TSTR("tnode cache \"%s\" %p\n"),
++ allocator->tnode_name,allocator->tnode_cache));
++ else {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs cache creation failed\n")));
++ YBUG();
++ }
++
++
++ allocator->object_cache =
++ kmem_cache_create(allocator->object_name,
++ sizeof(yaffs_Object),
++ 0, 0,
++ fake_ctor_list[mount_id]);
++
++ if(allocator->object_cache)
++ T(YAFFS_TRACE_ALLOCATE,
++ (TSTR("object cache \"%s\" %p\n"),
++ allocator->object_name,allocator->object_cache));
++
++ else {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs cache creation failed\n")));
++ YBUG();
++ }
++ }
++}
++
++
++yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++ if(!allocator || !allocator->tnode_cache){
++ YBUG();
++ return NULL;
++ }
++ return kmem_cache_alloc(allocator->tnode_cache, GFP_NOFS);
++}
++
++void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++ kmem_cache_free(allocator->tnode_cache,tn);
++}
++
++yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++ if(!allocator){
++ YBUG();
++ return NULL;
++ }
++ if(!allocator->object_cache){
++ YBUG();
++ return NULL;
++ }
++ return kmem_cache_alloc(allocator->object_cache, GFP_NOFS);
++}
++
++void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
++{
++ yaffs_Allocator *allocator = dev->allocator;
++ kmem_cache_free(allocator->object_cache,obj);
++}
+diff -Nrup a/fs/yaffs2/yaffs_linux.h b/fs/yaffs2/yaffs_linux.h
+--- a/fs/yaffs2/yaffs_linux.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_linux.h 2010-10-03 18:03:47.544000367 +0300
+@@ -0,0 +1,43 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_LINUX_H__
++#define __YAFFS_LINUX_H__
++
++#include "devextras.h"
++#include "yportenv.h"
++
++struct yaffs_LinuxContext {
++ struct ylist_head contextList; /* List of these we have mounted */
++ struct yaffs_DeviceStruct *dev;
++ struct super_block * superBlock;
++ struct task_struct *bgThread; /* Background thread for this device */
++ int bgRunning;
++ struct semaphore grossLock; /* Gross locking semaphore */
++ __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
++ * at compile time so we have to allocate it.
++ */
++ struct ylist_head searchContexts;
++ void (*putSuperFunc)(struct super_block *sb);
++
++ struct task_struct *readdirProcess;
++ unsigned mount_id;
++};
++
++#define yaffs_DeviceToLC(dev) ((struct yaffs_LinuxContext *)((dev)->osContext))
++#define yaffs_DeviceToMtd(dev) ((struct mtd_info *)((dev)->driverContext))
++
++#endif
++
+diff -Nrup a/fs/yaffs2/yaffs_list.h b/fs/yaffs2/yaffs_list.h
+--- a/fs/yaffs2/yaffs_list.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_list.h 2010-10-03 18:03:47.544000367 +0300
+@@ -0,0 +1,127 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++/*
++ * This file is just holds extra declarations of macros that would normally
++ * be providesd in the Linux kernel. These macros have been written from
++ * scratch but are functionally equivalent to the Linux ones.
++ *
++ */
++
++#ifndef __YAFFS_LIST_H__
++#define __YAFFS_LIST_H__
++
++
++#include "yportenv.h"
++
++/*
++ * This is a simple doubly linked list implementation that matches the
++ * way the Linux kernel doubly linked list implementation works.
++ */
++
++struct ylist_head {
++ struct ylist_head *next; /* next in chain */
++ struct ylist_head *prev; /* previous in chain */
++};
++
++
++/* Initialise a static list */
++#define YLIST_HEAD(name) \
++struct ylist_head name = { &(name), &(name)}
++
++
++
++/* Initialise a list head to an empty list */
++#define YINIT_LIST_HEAD(p) \
++do { \
++ (p)->next = (p);\
++ (p)->prev = (p); \
++} while (0)
++
++
++/* Add an element to a list */
++static Y_INLINE void ylist_add(struct ylist_head *newEntry,
++ struct ylist_head *list)
++{
++ struct ylist_head *listNext = list->next;
++
++ list->next = newEntry;
++ newEntry->prev = list;
++ newEntry->next = listNext;
++ listNext->prev = newEntry;
++
++}
++
++static Y_INLINE void ylist_add_tail(struct ylist_head *newEntry,
++ struct ylist_head *list)
++{
++ struct ylist_head *listPrev = list->prev;
++
++ list->prev = newEntry;
++ newEntry->next = list;
++ newEntry->prev = listPrev;
++ listPrev->next = newEntry;
++
++}
++
++
++/* Take an element out of its current list, with or without
++ * reinitialising the links.of the entry*/
++static Y_INLINE void ylist_del(struct ylist_head *entry)
++{
++ struct ylist_head *listNext = entry->next;
++ struct ylist_head *listPrev = entry->prev;
++
++ listNext->prev = listPrev;
++ listPrev->next = listNext;
++
++}
++
++static Y_INLINE void ylist_del_init(struct ylist_head *entry)
++{
++ ylist_del(entry);
++ entry->next = entry->prev = entry;
++}
++
++
++/* Test if the list is empty */
++static Y_INLINE int ylist_empty(struct ylist_head *entry)
++{
++ return (entry->next == entry);
++}
++
++
++/* ylist_entry takes a pointer to a list entry and offsets it to that
++ * we can find a pointer to the object it is embedded in.
++ */
++
++
++#define ylist_entry(entry, type, member) \
++ ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member)))
++
++
++/* ylist_for_each and list_for_each_safe iterate over lists.
++ * ylist_for_each_safe uses temporary storage to make the list delete safe
++ */
++
++#define ylist_for_each(itervar, list) \
++ for (itervar = (list)->next; itervar != (list); itervar = itervar->next)
++
++#define ylist_for_each_safe(itervar, saveVar, list) \
++ for (itervar = (list)->next, saveVar = (list)->next->next; \
++ itervar != (list); itervar = saveVar, saveVar = saveVar->next)
++
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_mtdif1.c b/fs/yaffs2/yaffs_mtdif1.c
+--- a/fs/yaffs2/yaffs_mtdif1.c 2010-10-03 17:48:22.719000363 +0300
++++ b/fs/yaffs2/yaffs_mtdif1.c 2010-10-03 18:03:47.519000366 +0300
+@@ -2,7 +2,7 @@
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
+ *
+- * Copyright (C) 2002 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify
+@@ -24,9 +24,11 @@
+ */
+
+ #include "yportenv.h"
++#include "yaffs_trace.h"
+ #include "yaffs_guts.h"
+ #include "yaffs_packedtags1.h"
+ #include "yaffs_tagscompat.h" /* for yaffs_CalcTagsECC */
++#include "yaffs_linux.h"
+
+ #include "linux/kernel.h"
+ #include "linux/version.h"
+@@ -36,8 +38,6 @@
+ /* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
+ #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+
+-const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.10 2009-03-09 07:41:10 charles Exp $";
+-
+ #ifndef CONFIG_YAFFS_9BYTE_TAGS
+ # define YTAG1_SIZE 8
+ #else
+@@ -91,7 +91,7 @@ static struct nand_ecclayout nand_oob_16
+ int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
+ int chunkInNAND, const __u8 *data, const yaffs_ExtendedTags *etags)
+ {
+- struct mtd_info *mtd = dev->genericDevice;
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ int chunkBytes = dev->nDataBytesPerChunk;
+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
+ struct mtd_oob_ops ops;
+@@ -102,8 +102,6 @@ int nandmtd1_WriteChunkWithTagsToNAND(ya
+ compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
+ compile_time_assertion(sizeof(yaffs_Tags) == 8);
+
+- dev->nPageWrites++;
+-
+ yaffs_PackTags1(&pt1, etags);
+ yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
+
+@@ -137,9 +135,9 @@ int nandmtd1_WriteChunkWithTagsToNAND(ya
+
+ retval = mtd->write_oob(mtd, addr, &ops);
+ if (retval) {
+- yaffs_trace(YAFFS_TRACE_MTD,
+- "write_oob failed, chunk %d, mtd error %d\n",
+- chunkInNAND, retval);
++ T(YAFFS_TRACE_MTD,
++ (TSTR("write_oob failed, chunk %d, mtd error %d"TENDSTR),
++ chunkInNAND, retval));
+ }
+ return retval ? YAFFS_FAIL : YAFFS_OK;
+ }
+@@ -171,7 +169,7 @@ static int rettags(yaffs_ExtendedTags *e
+ int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
+ int chunkInNAND, __u8 *data, yaffs_ExtendedTags *etags)
+ {
+- struct mtd_info *mtd = dev->genericDevice;
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ int chunkBytes = dev->nDataBytesPerChunk;
+ loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
+ int eccres = YAFFS_ECC_RESULT_NO_ERROR;
+@@ -180,8 +178,6 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
+ int retval;
+ int deleted;
+
+- dev->nPageReads++;
+-
+ memset(&ops, 0, sizeof(ops));
+ ops.mode = MTD_OOB_AUTO;
+ ops.len = (data) ? chunkBytes : 0;
+@@ -200,9 +196,9 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
+ */
+ retval = mtd->read_oob(mtd, addr, &ops);
+ if (retval) {
+- yaffs_trace(YAFFS_TRACE_MTD,
+- "read_oob failed, chunk %d, mtd error %d\n",
+- chunkInNAND, retval);
++ T(YAFFS_TRACE_MTD,
++ (TSTR("read_oob failed, chunk %d, mtd error %d"TENDSTR),
++ chunkInNAND, retval));
+ }
+
+ switch (retval) {
+@@ -284,11 +280,11 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y
+ */
+ int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
+ {
+- struct mtd_info *mtd = dev->genericDevice;
+- int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
++ int blocksize = dev->param.nChunksPerBlock * dev->nDataBytesPerChunk;
+ int retval;
+
+- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad\n", blockNo);
++ T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("marking block %d bad"TENDSTR), blockNo));
+
+ retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
+ return (retval) ? YAFFS_FAIL : YAFFS_OK;
+@@ -305,9 +301,9 @@ static int nandmtd1_TestPrerequists(stru
+ int oobavail = mtd->ecclayout->oobavail;
+
+ if (oobavail < YTAG1_SIZE) {
+- yaffs_trace(YAFFS_TRACE_ERROR,
+- "mtd device has only %d bytes for tags, need %d\n",
+- oobavail, YTAG1_SIZE);
++ T(YAFFS_TRACE_ERROR,
++ (TSTR("mtd device has only %d bytes for tags, need %d"TENDSTR),
++ oobavail, YTAG1_SIZE));
+ return YAFFS_FAIL;
+ }
+ return YAFFS_OK;
+@@ -325,8 +321,8 @@ static int nandmtd1_TestPrerequists(stru
+ int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+ yaffs_BlockState *pState, __u32 *pSequenceNumber)
+ {
+- struct mtd_info *mtd = dev->genericDevice;
+- int chunkNo = blockNo * dev->nChunksPerBlock;
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
++ int chunkNo = blockNo * dev->param.nChunksPerBlock;
+ loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk;
+ yaffs_ExtendedTags etags;
+ int state = YAFFS_BLOCK_STATE_DEAD;
+@@ -342,8 +338,8 @@ int nandmtd1_QueryNANDBlock(struct yaffs
+ retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
+ etags.blockBad = (mtd->block_isbad)(mtd, addr);
+ if (etags.blockBad) {
+- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
+- "block %d is marked bad\n", blockNo);
++ T(YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("block %d is marked bad"TENDSTR), blockNo));
+ state = YAFFS_BLOCK_STATE_DEAD;
+ } else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) {
+ /* bad tags, need to look more closely */
+diff -Nrup a/fs/yaffs2/yaffs_mtdif1-compat.c b/fs/yaffs2/yaffs_mtdif1-compat.c
+--- a/fs/yaffs2/yaffs_mtdif1-compat.c 2010-10-03 17:29:32.916000361 +0300
++++ b/fs/yaffs2/yaffs_mtdif1-compat.c 1970-01-01 02:00:00.000000000 +0200
+@@ -1,434 +0,0 @@
+-From ian@brightstareng.com Fri May 18 15:06:49 2007
+-From ian@brightstareng.com Fri May 18 15:08:21 2007
+-Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com)
+- by apollo.linkchoose.co.uk with esmtp (Exim 4.60)
+- (envelope-from <ian@brightstareng.com>)
+- id 1Hp380-00011e-T6
+- for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100
+-Received: from localhost (localhost.localdomain [127.0.0.1])
+- by zebra.brightstareng.com (Postfix) with ESMTP
+- id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT)
+-Received: from zebra.brightstareng.com ([127.0.0.1])
+- by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP
+- id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT)
+-Received: from pippin (unknown [192.168.1.25])
+- by zebra.brightstareng.com (Postfix) with ESMTP
+- id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT)
+-From: Ian McDonnell <ian@brightstareng.com>
+-To: David Goodenough <david.goodenough@linkchoose.co.uk>
+-Subject: Re: something tested this time -- yaffs_mtdif1-compat.c
+-Date: Fri, 18 May 2007 10:06:49 -0400
+-User-Agent: KMail/1.9.1
+-References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk>
+-In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk>
+-Cc: Andrea Conti <alyf@alyf.net>,
+- Charles Manning <manningc2@actrix.gen.nz>
+-MIME-Version: 1.0
+-Content-Type: Multipart/Mixed;
+- boundary="Boundary-00=_5LbTGmt62YoutxM"
+-Message-Id: <200705181006.49860.ian@brightstareng.com>
+-X-Virus-Scanned: by amavisd-new at brightstareng.com
+-Status: R
+-X-Status: NT
+-X-KMail-EncryptionState:
+-X-KMail-SignatureState:
+-X-KMail-MDN-Sent:
+-
+---Boundary-00=_5LbTGmt62YoutxM
+-Content-Type: text/plain;
+- charset="iso-8859-15"
+-Content-Transfer-Encoding: 7bit
+-Content-Disposition: inline
+-
+-David, Andrea,
+-
+-On Friday 18 May 2007 08:34, you wrote:
+-> Yea team. With this fix in place (I put it in the wrong place
+-> at first) I can now mount and ls the Yaffs partition without
+-> an error messages!
+-
+-Good news!
+-
+-Attached is a newer yaffs_mtdif1.c with a bandaid to help the
+-2.6.18 and 2.6.19 versions of MTD not trip on the oob read.
+-See the LINUX_VERSION_CODE conditional in
+-nandmtd1_ReadChunkWithTagsFromNAND.
+-
+--imcd
+-
+---Boundary-00=_5LbTGmt62YoutxM
+-Content-Type: text/x-csrc;
+- charset="iso-8859-15";
+- name="yaffs_mtdif1.c"
+-Content-Transfer-Encoding: 7bit
+-Content-Disposition: attachment;
+- filename="yaffs_mtdif1.c"
+-
+-/*
+- * YAFFS: Yet another FFS. A NAND-flash specific file system.
+- * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
+- *
+- * Copyright (C) 2002 Aleph One Ltd.
+- * for Toby Churchill Ltd and Brightstar Engineering
+- *
+- * This program is free software; you can redistribute it and/or modify
+- * it under the terms of the GNU General Public License version 2 as
+- * published by the Free Software Foundation.
+- */
+-
+-/*
+- * This module provides the interface between yaffs_nand.c and the
+- * MTD API. This version is used when the MTD interface supports the
+- * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
+- * and we have small-page NAND device.
+- *
+- * These functions are invoked via function pointers in yaffs_nand.c.
+- * This replaces functionality provided by functions in yaffs_mtdif.c
+- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
+- * called in yaffs_mtdif.c when the function pointers are NULL.
+- * We assume the MTD layer is performing ECC (useNANDECC is true).
+- */
+-
+-#include "yportenv.h"
+-#include "yaffs_guts.h"
+-#include "yaffs_packedtags1.h"
+-#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC
+-
+-#include "linux/kernel.h"
+-#include "linux/version.h"
+-#include "linux/types.h"
+-#include "linux/mtd/mtd.h"
+-
+-/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
+-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+-
+-const char *yaffs_mtdif1_c_version = "$Id$";
+-
+-#ifndef CONFIG_YAFFS_9BYTE_TAGS
+-# define YTAG1_SIZE 8
+-#else
+-# define YTAG1_SIZE 9
+-#endif
+-
+-#if 0
+-/* Use the following nand_ecclayout with MTD when using
+- * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
+- * If you have existing Yaffs images and the byte order differs from this,
+- * adjust 'oobfree' to match your existing Yaffs data.
+- *
+- * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
+- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
+- * the 9th byte.
+- *
+- * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
+- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
+- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
+- * byte and B is the small-page bad-block indicator byte.
+- */
+-static struct nand_ecclayout nand_oob_16 = {
+- .eccbytes = 6,
+- .eccpos = { 8, 9, 10, 13, 14, 15 },
+- .oobavail = 9,
+- .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
+-};
+-#endif
+-
+-/* Write a chunk (page) of data to NAND.
+- *
+- * Caller always provides ExtendedTags data which are converted to a more
+- * compact (packed) form for storage in NAND. A mini-ECC runs over the
+- * contents of the tags meta-data; used to valid the tags when read.
+- *
+- * - Pack ExtendedTags to PackedTags1 form
+- * - Compute mini-ECC for PackedTags1
+- * - Write data and packed tags to NAND.
+- *
+- * Note: Due to the use of the PackedTags1 meta-data which does not include
+- * a full sequence number (as found in the larger PackedTags2 form) it is
+- * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
+- * discarded and dirty. This is not ideal: newer NAND parts are supposed
+- * to be written just once. When Yaffs performs this operation, this
+- * function is called with a NULL data pointer -- calling MTD write_oob
+- * without data is valid usage (2.6.17).
+- *
+- * Any underlying MTD error results in YAFFS_FAIL.
+- * Returns YAFFS_OK or YAFFS_FAIL.
+- */
+-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
+- int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
+-{
+- struct mtd_info * mtd = dev->genericDevice;
+- int chunkBytes = dev->nDataBytesPerChunk;
+- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
+- struct mtd_oob_ops ops;
+- yaffs_PackedTags1 pt1;
+- int retval;
+-
+- /* we assume that PackedTags1 and yaffs_Tags are compatible */
+- compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
+- compile_time_assertion(sizeof(yaffs_Tags) == 8);
+-
+- yaffs_PackTags1(&pt1, etags);
+- yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
+-
+- /* When deleting a chunk, the upper layer provides only skeletal
+- * etags, one with chunkDeleted set. However, we need to update the
+- * tags, not erase them completely. So we use the NAND write property
+- * that only zeroed-bits stick and set tag bytes to all-ones and
+- * zero just the (not) deleted bit.
+- */
+-#ifndef CONFIG_YAFFS_9BYTE_TAGS
+- if (etags->chunkDeleted) {
+- memset(&pt1, 0xff, 8);
+- /* clear delete status bit to indicate deleted */
+- pt1.deleted = 0;
+- }
+-#else
+- ((__u8 *)&pt1)[8] = 0xff;
+- if (etags->chunkDeleted) {
+- memset(&pt1, 0xff, 8);
+- /* zero pageStatus byte to indicate deleted */
+- ((__u8 *)&pt1)[8] = 0;
+- }
+-#endif
+-
+- memset(&ops, 0, sizeof(ops));
+- ops.mode = MTD_OOB_AUTO;
+- ops.len = (data) ? chunkBytes : 0;
+- ops.ooblen = YTAG1_SIZE;
+- ops.datbuf = (__u8 *)data;
+- ops.oobbuf = (__u8 *)&pt1;
+-
+- retval = mtd->write_oob(mtd, addr, &ops);
+- if (retval) {
+- yaffs_trace(YAFFS_TRACE_MTD,
+- "write_oob failed, chunk %d, mtd error %d\n",
+- chunkInNAND, retval);
+- }
+- return retval ? YAFFS_FAIL : YAFFS_OK;
+-}
+-
+-/* Return with empty ExtendedTags but add eccResult.
+- */
+-static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
+-{
+- if (etags) {
+- memset(etags, 0, sizeof(*etags));
+- etags->eccResult = eccResult;
+- }
+- return retval;
+-}
+-
+-/* Read a chunk (page) from NAND.
+- *
+- * Caller expects ExtendedTags data to be usable even on error; that is,
+- * all members except eccResult and blockBad are zeroed.
+- *
+- * - Check ECC results for data (if applicable)
+- * - Check for blank/erased block (return empty ExtendedTags if blank)
+- * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
+- * - Convert PackedTags1 to ExtendedTags
+- * - Update eccResult and blockBad members to refect state.
+- *
+- * Returns YAFFS_OK or YAFFS_FAIL.
+- */
+-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
+- int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
+-{
+- struct mtd_info * mtd = dev->genericDevice;
+- int chunkBytes = dev->nDataBytesPerChunk;
+- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
+- int eccres = YAFFS_ECC_RESULT_NO_ERROR;
+- struct mtd_oob_ops ops;
+- yaffs_PackedTags1 pt1;
+- int retval;
+- int deleted;
+-
+- memset(&ops, 0, sizeof(ops));
+- ops.mode = MTD_OOB_AUTO;
+- ops.len = (data) ? chunkBytes : 0;
+- ops.ooblen = YTAG1_SIZE;
+- ops.datbuf = data;
+- ops.oobbuf = (__u8 *)&pt1;
+-
+-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+- /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
+- * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
+- */
+- ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
+-#endif
+- /* Read page and oob using MTD.
+- * Check status and determine ECC result.
+- */
+- retval = mtd->read_oob(mtd, addr, &ops);
+- if (retval) {
+- yaffs_trace(YAFFS_TRACE_MTD,
+- "read_oob failed, chunk %d, mtd error %d\n",
+- chunkInNAND, retval);
+- }
+-
+- switch (retval) {
+- case 0:
+- /* no error */
+- break;
+-
+- case -EUCLEAN:
+- /* MTD's ECC fixed the data */
+- eccres = YAFFS_ECC_RESULT_FIXED;
+- dev->eccFixed++;
+- break;
+-
+- case -EBADMSG:
+- /* MTD's ECC could not fix the data */
+- dev->eccUnfixed++;
+- /* fall into... */
+- default:
+- rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
+- etags->blockBad = (mtd->block_isbad)(mtd, addr);
+- return YAFFS_FAIL;
+- }
+-
+- /* Check for a blank/erased chunk.
+- */
+- if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
+- /* when blank, upper layers want eccResult to be <= NO_ERROR */
+- return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
+- }
+-
+-#ifndef CONFIG_YAFFS_9BYTE_TAGS
+- /* Read deleted status (bit) then return it to it's non-deleted
+- * state before performing tags mini-ECC check. pt1.deleted is
+- * inverted.
+- */
+- deleted = !pt1.deleted;
+- pt1.deleted = 1;
+-#else
+- (void) deleted; /* not used */
+-#endif
+-
+- /* Check the packed tags mini-ECC and correct if necessary/possible.
+- */
+- retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
+- switch (retval) {
+- case 0:
+- /* no tags error, use MTD result */
+- break;
+- case 1:
+- /* recovered tags-ECC error */
+- dev->tagsEccFixed++;
+- eccres = YAFFS_ECC_RESULT_FIXED;
+- break;
+- default:
+- /* unrecovered tags-ECC error */
+- dev->tagsEccUnfixed++;
+- return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
+- }
+-
+- /* Unpack the tags to extended form and set ECC result.
+- * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
+- */
+- pt1.shouldBeFF = 0xFFFFFFFF;
+- yaffs_UnpackTags1(etags, &pt1);
+- etags->eccResult = eccres;
+-
+- /* Set deleted state.
+- */
+-#ifndef CONFIG_YAFFS_9BYTE_TAGS
+- etags->chunkDeleted = deleted;
+-#else
+- etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
+-#endif
+- return YAFFS_OK;
+-}
+-
+-/* Mark a block bad.
+- *
+- * This is a persistant state.
+- * Use of this function should be rare.
+- *
+- * Returns YAFFS_OK or YAFFS_FAIL.
+- */
+-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
+-{
+- struct mtd_info * mtd = dev->genericDevice;
+- int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
+- int retval;
+-
+- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
+-
+- retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
+- return (retval) ? YAFFS_FAIL : YAFFS_OK;
+-}
+-
+-/* Check any MTD prerequists.
+- *
+- * Returns YAFFS_OK or YAFFS_FAIL.
+- */
+-static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
+-{
+- /* 2.6.18 has mtd->ecclayout->oobavail */
+- /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
+- int oobavail = mtd->ecclayout->oobavail;
+-
+- if (oobavail < YTAG1_SIZE) {
+- yaffs_trace(YAFFS_TRACE_ERROR,
+- "mtd device has only %d bytes for tags, need %d",
+- oobavail, YTAG1_SIZE);
+- return YAFFS_FAIL;
+- }
+- return YAFFS_OK;
+-}
+-
+-/* Query for the current state of a specific block.
+- *
+- * Examine the tags of the first chunk of the block and return the state:
+- * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
+- * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
+- * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
+- *
+- * Always returns YAFFS_OK.
+- */
+-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+- yaffs_BlockState * pState, int *pSequenceNumber)
+-{
+- struct mtd_info * mtd = dev->genericDevice;
+- int chunkNo = blockNo * dev->nChunksPerBlock;
+- yaffs_ExtendedTags etags;
+- int state = YAFFS_BLOCK_STATE_DEAD;
+- int seqnum = 0;
+- int retval;
+-
+- /* We don't yet have a good place to test for MTD config prerequists.
+- * Do it here as we are called during the initial scan.
+- */
+- if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
+- return YAFFS_FAIL;
+- }
+-
+- retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
+- if (etags.blockBad) {
+- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
+- "block %d is marked bad", blockNo);
+- state = YAFFS_BLOCK_STATE_DEAD;
+- }
+- else if (etags.chunkUsed) {
+- state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
+- seqnum = etags.sequenceNumber;
+- }
+- else {
+- state = YAFFS_BLOCK_STATE_EMPTY;
+- }
+-
+- *pState = state;
+- *pSequenceNumber = seqnum;
+-
+- /* query always succeeds */
+- return YAFFS_OK;
+-}
+-
+-#endif /*KERNEL_VERSION*/
+-
+---Boundary-00=_5LbTGmt62YoutxM--
+-
+-
+-
+diff -Nrup a/fs/yaffs2/yaffs_mtdif1.h b/fs/yaffs2/yaffs_mtdif1.h
+--- a/fs/yaffs2/yaffs_mtdif1.h 2010-10-03 17:48:22.719000363 +0300
++++ b/fs/yaffs2/yaffs_mtdif1.h 2010-10-03 18:03:47.545000367 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify
+diff -Nrup a/fs/yaffs2/yaffs_mtdif2.c b/fs/yaffs2/yaffs_mtdif2.c
+--- a/fs/yaffs2/yaffs_mtdif2.c 2010-10-03 17:48:22.720000363 +0300
++++ b/fs/yaffs2/yaffs_mtdif2.c 2010-10-03 18:03:47.520000367 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -13,11 +13,8 @@
+
+ /* mtd interface for YAFFS2 */
+
+-const char *yaffs_mtdif2_c_version =
+- "$Id: yaffs_mtdif2.c,v 1.23 2009-03-06 17:20:53 wookey Exp $";
+-
+ #include "yportenv.h"
+-
++#include "yaffs_trace.h"
+
+ #include "yaffs_mtdif2.h"
+
+@@ -27,6 +24,8 @@ const char *yaffs_mtdif2_c_version =
+
+ #include "yaffs_packedtags2.h"
+
++#include "yaffs_linux.h"
++
+ /* NB For use with inband tags....
+ * We assume that the data buffer is of size totalBytersPerChunk so that we can also
+ * use it to load the tags.
+@@ -35,7 +34,7 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
+ const __u8 *data,
+ const yaffs_ExtendedTags *tags)
+ {
+- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ struct mtd_oob_ops ops;
+ #else
+@@ -47,13 +46,16 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
+
+ yaffs_PackedTags2 pt;
+
++ int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt);
++ void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t : (void *)&pt;
++
+ T(YAFFS_TRACE_MTD,
+ (TSTR
+ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
+ TENDSTR), chunkInNAND, data, tags));
+
+
+- addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
++ addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk;
+
+ /* For yaffs2 writing there must be both data and tags.
+ * If we're using inband tags, then the tags are stuffed into
+@@ -61,30 +63,30 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
+ */
+ if (!data || !tags)
+ BUG();
+- else if (dev->inbandTags) {
++ else if (dev->param.inbandTags) {
+ yaffs_PackedTags2TagsPart *pt2tp;
+ pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
+ yaffs_PackTags2TagsPart(pt2tp, tags);
+ } else
+- yaffs_PackTags2(&pt, tags);
++ yaffs_PackTags2(&pt, tags, !dev->param.noTagsECC);
+
+ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ ops.mode = MTD_OOB_AUTO;
+- ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);
+- ops.len = dev->totalBytesPerChunk;
++ ops.ooblen = (dev->param.inbandTags) ? 0 : packed_tags_size;
++ ops.len = dev->param.totalBytesPerChunk;
+ ops.ooboffs = 0;
+ ops.datbuf = (__u8 *)data;
+- ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;
++ ops.oobbuf = (dev->param.inbandTags) ? NULL : packed_tags_ptr;
+ retval = mtd->write_oob(mtd, addr, &ops);
+
+ #else
+- if (!dev->inbandTags) {
++ if (!dev->param.inbandTags) {
+ retval =
+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+- &dummy, data, (__u8 *) &pt, NULL);
++ &dummy, data, (__u8 *) packed_tags_ptr, NULL);
+ } else {
+ retval =
+- mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,
++ mtd->write(mtd, addr, dev->param.totalBytesPerChunk, &dummy,
+ data);
+ }
+ #endif
+@@ -98,7 +100,7 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya
+ int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+ __u8 *data, yaffs_ExtendedTags *tags)
+ {
+- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ struct mtd_oob_ops ops;
+ #endif
+@@ -106,16 +108,19 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+ int retval = 0;
+ int localData = 0;
+
+- loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
++ loff_t addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk;
+
+ yaffs_PackedTags2 pt;
+
++ int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt);
++ void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t: (void *)&pt;
++
+ T(YAFFS_TRACE_MTD,
+ (TSTR
+ ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
+ TENDSTR), chunkInNAND, data, tags));
+
+- if (dev->inbandTags) {
++ if (dev->param.inbandTags) {
+
+ if (!data) {
+ localData = 1;
+@@ -127,20 +132,20 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+
+
+ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+- if (dev->inbandTags || (data && !tags))
+- retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,
++ if (dev->param.inbandTags || (data && !tags))
++ retval = mtd->read(mtd, addr, dev->param.totalBytesPerChunk,
+ &dummy, data);
+ else if (tags) {
+ ops.mode = MTD_OOB_AUTO;
+- ops.ooblen = sizeof(pt);
+- ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
++ ops.ooblen = packed_tags_size;
++ ops.len = data ? dev->nDataBytesPerChunk : packed_tags_size;
+ ops.ooboffs = 0;
+ ops.datbuf = data;
+- ops.oobbuf = dev->spareBuffer;
++ ops.oobbuf = yaffs_DeviceToLC(dev)->spareBuffer;
+ retval = mtd->read_oob(mtd, addr, &ops);
+ }
+ #else
+- if (!dev->inbandTags && data && tags) {
++ if (!dev->param.inbandTags && data && tags) {
+
+ retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+ &dummy, data, dev->spareBuffer,
+@@ -150,7 +155,7 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+ retval =
+ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
+ data);
+- if (!dev->inbandTags && tags)
++ if (!dev->param.inbandTags && tags)
+ retval =
+ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
+ dev->spareBuffer);
+@@ -158,7 +163,7 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+ #endif
+
+
+- if (dev->inbandTags) {
++ if (dev->param.inbandTags) {
+ if (tags) {
+ yaffs_PackedTags2TagsPart *pt2tp;
+ pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
+@@ -166,16 +171,22 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+ }
+ } else {
+ if (tags) {
+- memcpy(&pt, dev->spareBuffer, sizeof(pt));
+- yaffs_UnpackTags2(tags, &pt);
++ memcpy(packed_tags_ptr, yaffs_DeviceToLC(dev)->spareBuffer, packed_tags_size);
++ yaffs_UnpackTags2(tags, &pt, !dev->param.noTagsECC);
+ }
+ }
+
+ if (localData)
+ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
+
+- if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
++ if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) {
+ tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
++ dev->eccUnfixed++;
++ }
++ if(tags && retval == -EUCLEAN && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) {
++ tags->eccResult = YAFFS_ECC_RESULT_FIXED;
++ dev->eccFixed++;
++ }
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+@@ -184,15 +195,15 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y
+
+ int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
+ {
+- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ int retval;
+ T(YAFFS_TRACE_MTD,
+ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
+
+ retval =
+ mtd->block_markbad(mtd,
+- blockNo * dev->nChunksPerBlock *
+- dev->totalBytesPerChunk);
++ blockNo * dev->param.nChunksPerBlock *
++ dev->param.totalBytesPerChunk);
+
+ if (retval == 0)
+ return YAFFS_OK;
+@@ -204,15 +215,15 @@ int nandmtd2_MarkNANDBlockBad(struct yaf
+ int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+ yaffs_BlockState *state, __u32 *sequenceNumber)
+ {
+- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ int retval;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
+ retval =
+ mtd->block_isbad(mtd,
+- blockNo * dev->nChunksPerBlock *
+- dev->totalBytesPerChunk);
++ blockNo * dev->param.nChunksPerBlock *
++ dev->param.totalBytesPerChunk);
+
+ if (retval) {
+ T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
+@@ -223,7 +234,7 @@ int nandmtd2_QueryNANDBlock(struct yaffs
+ yaffs_ExtendedTags t;
+ nandmtd2_ReadChunkWithTagsFromNAND(dev,
+ blockNo *
+- dev->nChunksPerBlock, NULL,
++ dev->param.nChunksPerBlock, NULL,
+ &t);
+
+ if (t.chunkUsed) {
+diff -Nrup a/fs/yaffs2/yaffs_mtdif2.h b/fs/yaffs2/yaffs_mtdif2.h
+--- a/fs/yaffs2/yaffs_mtdif2.h 2010-10-03 17:48:22.720000363 +0300
++++ b/fs/yaffs2/yaffs_mtdif2.h 2010-10-03 18:03:47.545000367 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_mtdif.c b/fs/yaffs2/yaffs_mtdif.c
+--- a/fs/yaffs2/yaffs_mtdif.c 2010-10-03 17:48:22.720000363 +0300
++++ b/fs/yaffs2/yaffs_mtdif.c 2010-10-03 18:03:47.521000367 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -11,9 +11,6 @@
+ * published by the Free Software Foundation.
+ */
+
+-const char *yaffs_mtdif_c_version =
+- "$Id: yaffs_mtdif.c,v 1.22 2009-03-06 17:20:51 wookey Exp $";
+-
+ #include "yportenv.h"
+
+
+@@ -24,208 +21,26 @@ const char *yaffs_mtdif_c_version =
+ #include "linux/time.h"
+ #include "linux/mtd/nand.h"
+
+-#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18))
+-static struct nand_oobinfo yaffs_oobinfo = {
+- .useecc = 1,
+- .eccbytes = 6,
+- .eccpos = {8, 9, 10, 13, 14, 15}
+-};
+-
+-static struct nand_oobinfo yaffs_noeccinfo = {
+- .useecc = 0,
+-};
+-#endif
+-
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+-static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
+-{
+- oob[0] = spare->tagByte0;
+- oob[1] = spare->tagByte1;
+- oob[2] = spare->tagByte2;
+- oob[3] = spare->tagByte3;
+- oob[4] = spare->tagByte4;
+- oob[5] = spare->tagByte5 & 0x3f;
+- oob[5] |= spare->blockStatus == 'Y' ? 0 : 0x80;
+- oob[5] |= spare->pageStatus == 0 ? 0 : 0x40;
+- oob[6] = spare->tagByte6;
+- oob[7] = spare->tagByte7;
+-}
+-
+-static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob)
+-{
+- struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare;
+- spare->tagByte0 = oob[0];
+- spare->tagByte1 = oob[1];
+- spare->tagByte2 = oob[2];
+- spare->tagByte3 = oob[3];
+- spare->tagByte4 = oob[4];
+- spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
+- spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y';
+- spare->pageStatus = oob[5] & 0x40 ? 0xff : 0;
+- spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
+- spare->tagByte6 = oob[6];
+- spare->tagByte7 = oob[7];
+- spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
+-
+- nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
+-}
+-#endif
+-
+-int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
+- const __u8 *data, const yaffs_Spare *spare)
+-{
+- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+- struct mtd_oob_ops ops;
+-#endif
+- size_t dummy;
+- int retval = 0;
+-
+- loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+- __u8 spareAsBytes[8]; /* OOB */
+-
+- if (data && !spare)
+- retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk,
+- &dummy, data);
+- else if (spare) {
+- if (dev->useNANDECC) {
+- translate_spare2oob(spare, spareAsBytes);
+- ops.mode = MTD_OOB_AUTO;
+- ops.ooblen = 8; /* temp hack */
+- } else {
+- ops.mode = MTD_OOB_RAW;
+- ops.ooblen = YAFFS_BYTES_PER_SPARE;
+- }
+- ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
+- ops.datbuf = (u8 *)data;
+- ops.ooboffs = 0;
+- ops.oobbuf = spareAsBytes;
+- retval = mtd->write_oob(mtd, addr, &ops);
+- }
+-#else
+- __u8 *spareAsBytes = (__u8 *) spare;
+-
+- if (data && spare) {
+- if (dev->useNANDECC)
+- retval =
+- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+- &dummy, data, spareAsBytes,
+- &yaffs_oobinfo);
+- else
+- retval =
+- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+- &dummy, data, spareAsBytes,
+- &yaffs_noeccinfo);
+- } else {
+- if (data)
+- retval =
+- mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
+- data);
+- if (spare)
+- retval =
+- mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
+- &dummy, spareAsBytes);
+- }
+-#endif
+-
+- if (retval == 0)
+- return YAFFS_OK;
+- else
+- return YAFFS_FAIL;
+-}
+-
+-int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
+- yaffs_Spare *spare)
+-{
+- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+- struct mtd_oob_ops ops;
+-#endif
+- size_t dummy;
+- int retval = 0;
+-
+- loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
+-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+- __u8 spareAsBytes[8]; /* OOB */
+-
+- if (data && !spare)
+- retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
+- &dummy, data);
+- else if (spare) {
+- if (dev->useNANDECC) {
+- ops.mode = MTD_OOB_AUTO;
+- ops.ooblen = 8; /* temp hack */
+- } else {
+- ops.mode = MTD_OOB_RAW;
+- ops.ooblen = YAFFS_BYTES_PER_SPARE;
+- }
+- ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
+- ops.datbuf = data;
+- ops.ooboffs = 0;
+- ops.oobbuf = spareAsBytes;
+- retval = mtd->read_oob(mtd, addr, &ops);
+- if (dev->useNANDECC)
+- translate_oob2spare(spare, spareAsBytes);
+- }
+-#else
+- __u8 *spareAsBytes = (__u8 *) spare;
+-
+- if (data && spare) {
+- if (dev->useNANDECC) {
+- /* Careful, this call adds 2 ints */
+- /* to the end of the spare data. Calling function */
+- /* should allocate enough memory for spare, */
+- /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */
+- retval =
+- mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+- &dummy, data, spareAsBytes,
+- &yaffs_oobinfo);
+- } else {
+- retval =
+- mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+- &dummy, data, spareAsBytes,
+- &yaffs_noeccinfo);
+- }
+- } else {
+- if (data)
+- retval =
+- mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
+- data);
+- if (spare)
+- retval =
+- mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
+- &dummy, spareAsBytes);
+- }
+-#endif
+-
+- if (retval == 0)
+- return YAFFS_OK;
+- else
+- return YAFFS_FAIL;
+-}
++#include "yaffs_linux.h"
+
+ int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
+ {
+- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
++ struct mtd_info *mtd = yaffs_DeviceToMtd(dev);
+ __u32 addr =
+- ((loff_t) blockNumber) * dev->nDataBytesPerChunk
+- * dev->nChunksPerBlock;
++ ((loff_t) blockNumber) * dev->param.totalBytesPerChunk
++ * dev->param.nChunksPerBlock;
+ struct erase_info ei;
++
+ int retval = 0;
+
+ ei.mtd = mtd;
+ ei.addr = addr;
+- ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
++ ei.len = dev->param.totalBytesPerChunk * dev->param.nChunksPerBlock;
+ ei.time = 1000;
+ ei.retries = 2;
+ ei.callback = NULL;
+ ei.priv = (u_long) dev;
+
+- /* Todo finish off the ei if required */
+-
+- sema_init(&dev->sem, 0);
+-
+ retval = mtd->erase(mtd, &ei);
+
+ if (retval == 0)
+diff -Nrup a/fs/yaffs2/yaffs_mtdif.h b/fs/yaffs2/yaffs_mtdif.h
+--- a/fs/yaffs2/yaffs_mtdif.h 2010-10-03 17:48:22.721000363 +0300
++++ b/fs/yaffs2/yaffs_mtdif.h 2010-10-03 18:03:47.546000366 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -22,11 +22,6 @@
+ extern struct nand_oobinfo yaffs_oobinfo;
+ extern struct nand_oobinfo yaffs_noeccinfo;
+ #endif
+-
+-int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND,
+- const __u8 *data, const yaffs_Spare *spare);
+-int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
+- yaffs_Spare *spare);
+ int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
+ int nandmtd_InitialiseNAND(yaffs_Device *dev);
+ #endif
+diff -Nrup a/fs/yaffs2/yaffs_nameval.c b/fs/yaffs2/yaffs_nameval.c
+--- a/fs/yaffs2/yaffs_nameval.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_nameval.c 2010-10-03 18:03:47.523000363 +0300
+@@ -0,0 +1,197 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ * This simple implementation of a name-value store assumes a small number of values and fits
++ * into a small finite buffer.
++ *
++ * Each attribute is stored as a record:
++ * sizeof(int) bytes record size.
++ * strnlen+1 bytes name null terminated.
++ * nbytes value.
++ * ----------
++ * total size stored in record size
++ *
++ * This code has not been tested with unicode yet.
++ */
++
++
++#include "yaffs_nameval.h"
++
++#include "yportenv.h"
++
++static int nval_find(const char *xb, int xb_size, const YCHAR *name,
++ int *exist_size)
++{
++ int pos=0;
++ int size;
++
++ memcpy(&size,xb,sizeof(int));
++ while(size > 0 && (size < xb_size) && (pos + size < xb_size)){
++ if(yaffs_strncmp((YCHAR *)(xb+pos+sizeof(int)),name,size) == 0){
++ if(exist_size)
++ *exist_size = size;
++ return pos;
++ }
++ pos += size;
++ if(pos < xb_size -sizeof(int))
++ memcpy(&size,xb + pos,sizeof(int));
++ else
++ size = 0;
++ }
++ if(exist_size)
++ *exist_size = 0;
++ return -1;
++}
++
++static int nval_used(const char *xb, int xb_size)
++{
++ int pos=0;
++ int size;
++
++ memcpy(&size,xb + pos,sizeof(int));
++ while(size > 0 && (size < xb_size) && (pos + size < xb_size)){
++ pos += size;
++ if(pos < xb_size -sizeof(int))
++ memcpy(&size,xb + pos,sizeof(int));
++ else
++ size = 0;
++ }
++ return pos;
++}
++
++int nval_del(char *xb, int xb_size, const YCHAR *name)
++{
++ int pos = nval_find(xb, xb_size, name, NULL);
++ int size;
++
++ if(pos >= 0 && pos < xb_size){
++ /* Find size, shift rest over this record, then zero out the rest of buffer */
++ memcpy(&size,xb+pos,sizeof(int));
++ memcpy(xb + pos, xb + pos + size, xb_size - (pos + size));
++ memset(xb + (xb_size - size),0,size);
++ return 0;
++ } else
++ return -ENODATA;
++}
++
++int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, int bsize, int flags)
++{
++ int pos;
++ int namelen = yaffs_strnlen(name,xb_size);
++ int reclen;
++ int size_exist = 0;
++ int space;
++ int start;
++
++ pos = nval_find(xb,xb_size,name, &size_exist);
++
++ if(flags & XATTR_CREATE && pos >= 0)
++ return -EEXIST;
++ if(flags & XATTR_REPLACE && pos < 0)
++ return -ENODATA;
++
++ start = nval_used(xb,xb_size);
++ space = xb_size - start + size_exist;
++
++ reclen = (sizeof(int) + namelen + 1 + bsize);
++
++ if(reclen > space)
++ return -ENOSPC;
++
++ if(pos >= 0){
++ nval_del(xb,xb_size,name);
++ start = nval_used(xb, xb_size);
++ }
++
++ pos = start;
++
++ memcpy(xb + pos,&reclen,sizeof(int));
++ pos +=sizeof(int);
++ yaffs_strncpy((YCHAR *)(xb + pos), name, reclen);
++ pos+= (namelen+1);
++ memcpy(xb + pos,buf,bsize);
++ return 0;
++}
++
++int nval_get(const char *xb, int xb_size, const YCHAR *name, char *buf, int bsize)
++{
++ int pos = nval_find(xb,xb_size,name,NULL);
++ int size;
++
++ if(pos >= 0 && pos< xb_size){
++
++ memcpy(&size,xb +pos,sizeof(int));
++ pos+=sizeof(int); /* advance past record length */
++ size -= sizeof(int);
++
++ /* Advance over name string */
++ while(xb[pos] && size > 0 && pos < xb_size){
++ pos++;
++ size--;
++ }
++ /*Advance over NUL */
++ pos++;
++ size--;
++
++ if(size <= bsize){
++ memcpy(buf,xb + pos,size);
++ return size;
++ }
++
++ }
++ if(pos >= 0)
++ return -ERANGE;
++ else
++ return -ENODATA;
++}
++
++int nval_list(const char *xb, int xb_size, char *buf, int bsize)
++{
++ int pos = 0;
++ int size;
++ int name_len;
++ int ncopied = 0;
++ int filled = 0;
++
++ memcpy(&size,xb + pos,sizeof(int));
++ while(size > sizeof(int) && size <= xb_size && (pos + size) < xb_size && !filled){
++ pos+= sizeof(int);
++ size-=sizeof(int);
++ name_len = yaffs_strnlen((YCHAR *)(xb + pos), size);
++ if(ncopied + name_len + 1 < bsize){
++ memcpy(buf,xb+pos,name_len * sizeof(YCHAR));
++ buf+= name_len;
++ *buf = '\0';
++ buf++;
++ if(sizeof(YCHAR) > 1){
++ *buf = '\0';
++ buf++;
++ }
++ ncopied += (name_len+1);
++ } else
++ filled = 1;
++ pos+=size;
++ if(pos < xb_size -sizeof(int))
++ memcpy(&size,xb + pos,sizeof(int));
++ else
++ size = 0;
++ }
++ return ncopied;
++}
++
++
++int nval_hasvalues(const char *xb, int xb_size)
++{
++ return nval_used(xb, xb_size) > 0;
++}
+diff -Nrup a/fs/yaffs2/yaffs_nameval.h b/fs/yaffs2/yaffs_nameval.h
+--- a/fs/yaffs2/yaffs_nameval.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_nameval.h 2010-10-03 18:03:47.546000366 +0300
+@@ -0,0 +1,25 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++#ifndef __NAMEVAL_H__
++#define __NAMEVAL_H__
++
++#include "yportenv.h"
++
++int nval_del(char *xb, int xb_size, const YCHAR *name);
++int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, int bsize, int flags);
++int nval_get(const char *xb, int xb_size, const YCHAR *name, char *buf, int bsize);
++int nval_list(const char *xb, int xb_size, char *buf, int bsize);
++int nval_hasvalues(const char *xb, int xb_size);
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c
+--- a/fs/yaffs2/yaffs_nand.c 2010-10-03 17:48:22.721000363 +0300
++++ b/fs/yaffs2/yaffs_nand.c 2010-10-03 18:03:47.524000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -11,9 +11,6 @@
+ * published by the Free Software Foundation.
+ */
+
+-const char *yaffs_nand_c_version =
+- "$Id: yaffs_nand.c,v 1.10 2009-03-06 17:20:54 wookey Exp $";
+-
+ #include "yaffs_nand.h"
+ #include "yaffs_tagscompat.h"
+ #include "yaffs_tagsvalidity.h"
+@@ -29,12 +26,14 @@ int yaffs_ReadChunkWithTagsFromNAND(yaff
+
+ int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
+
++ dev->nPageReads++;
++
+ /* If there are no tags provided, use local tags to get prioritised gc working */
+ if (!tags)
+ tags = &localTags;
+
+- if (dev->readChunkWithTagsFromNAND)
+- result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
++ if (dev->param.readChunkWithTagsFromNAND)
++ result = dev->param.readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
+ tags);
+ else
+ result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
+@@ -44,7 +43,8 @@ int yaffs_ReadChunkWithTagsFromNAND(yaff
+ if (tags &&
+ tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) {
+
+- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
++ yaffs_BlockInfo *bi;
++ bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->param.nChunksPerBlock);
+ yaffs_HandleChunkError(dev, bi);
+ }
+
+@@ -56,6 +56,9 @@ int yaffs_WriteChunkWithTagsToNAND(yaffs
+ const __u8 *buffer,
+ yaffs_ExtendedTags *tags)
+ {
++
++ dev->nPageWrites++;
++
+ chunkInNAND -= dev->chunkOffset;
+
+
+@@ -75,8 +78,8 @@ int yaffs_WriteChunkWithTagsToNAND(yaffs
+ YBUG();
+ }
+
+- if (dev->writeChunkWithTagsToNAND)
+- return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
++ if (dev->param.writeChunkWithTagsToNAND)
++ return dev->param.writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
+ tags);
+ else
+ return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
+@@ -89,9 +92,9 @@ int yaffs_MarkBlockBad(yaffs_Device *dev
+ {
+ blockNo -= dev->blockOffset;
+
+-;
+- if (dev->markNANDBlockBad)
+- return dev->markNANDBlockBad(dev, blockNo);
++
++ if (dev->param.markNANDBlockBad)
++ return dev->param.markNANDBlockBad(dev, blockNo);
+ else
+ return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
+ }
+@@ -103,8 +106,8 @@ int yaffs_QueryInitialBlockState(yaffs_D
+ {
+ blockNo -= dev->blockOffset;
+
+- if (dev->queryNANDBlock)
+- return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
++ if (dev->param.queryNANDBlock)
++ return dev->param.queryNANDBlock(dev, blockNo, state, sequenceNumber);
+ else
+ return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
+ state,
+@@ -119,16 +122,18 @@ int yaffs_EraseBlockInNAND(struct yaffs_
+
+ blockInNAND -= dev->blockOffset;
+
+-
+ dev->nBlockErasures++;
+- result = dev->eraseBlockInNAND(dev, blockInNAND);
++
++ result = dev->param.eraseBlockInNAND(dev, blockInNAND);
+
+ return result;
+ }
+
+ int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
+ {
+- return dev->initialiseNAND(dev);
++ if(dev->param.initialiseNAND)
++ return dev->param.initialiseNAND(dev);
++ return YAFFS_OK;
+ }
+
+
+diff -Nrup a/fs/yaffs2/yaffs_nandemul2k.h b/fs/yaffs2/yaffs_nandemul2k.h
+--- a/fs/yaffs2/yaffs_nandemul2k.h 2010-10-03 17:48:22.721000364 +0300
++++ b/fs/yaffs2/yaffs_nandemul2k.h 2010-10-03 18:03:47.546000366 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_nand.h b/fs/yaffs2/yaffs_nand.h
+--- a/fs/yaffs2/yaffs_nand.h 2010-10-03 17:48:22.721000364 +0300
++++ b/fs/yaffs2/yaffs_nand.h 2010-10-03 18:03:47.547000363 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_packedtags1.c b/fs/yaffs2/yaffs_packedtags1.c
+--- a/fs/yaffs2/yaffs_packedtags1.c 2010-10-03 17:48:22.721000364 +0300
++++ b/fs/yaffs2/yaffs_packedtags1.c 2010-10-03 18:03:47.524000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_packedtags1.h b/fs/yaffs2/yaffs_packedtags1.h
+--- a/fs/yaffs2/yaffs_packedtags1.h 2010-10-03 17:48:22.721000364 +0300
++++ b/fs/yaffs2/yaffs_packedtags1.h 2010-10-03 18:03:47.547000363 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_packedtags2.c b/fs/yaffs2/yaffs_packedtags2.c
+--- a/fs/yaffs2/yaffs_packedtags2.c 2010-10-03 17:48:22.722000365 +0300
++++ b/fs/yaffs2/yaffs_packedtags2.c 2010-10-03 18:03:47.524000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -13,6 +13,7 @@
+
+ #include "yaffs_packedtags2.h"
+ #include "yportenv.h"
++#include "yaffs_trace.h"
+ #include "yaffs_tagsvalidity.h"
+
+ /* This code packs a set of extended tags into a binary structure for
+@@ -96,17 +97,14 @@ void yaffs_PackTags2TagsPart(yaffs_Packe
+ }
+
+
+-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t)
++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t, int tagsECC)
+ {
+ yaffs_PackTags2TagsPart(&pt->t, t);
+
+-#ifndef YAFFS_IGNORE_TAGS_ECC
+- {
++ if(tagsECC)
+ yaffs_ECCCalculateOther((unsigned char *)&pt->t,
+ sizeof(yaffs_PackedTags2TagsPart),
+ &pt->ecc);
+- }
+-#endif
+ }
+
+
+@@ -158,27 +156,24 @@ void yaffs_UnpackTags2TagsPart(yaffs_Ext
+ }
+
+
+-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
++void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt, int tagsECC)
+ {
+
+ yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_NO_ERROR;
+
+- if (pt->t.sequenceNumber != 0xFFFFFFFF) {
+- /* Page is in use */
+-#ifndef YAFFS_IGNORE_TAGS_ECC
+- {
+- yaffs_ECCOther ecc;
+- int result;
+- yaffs_ECCCalculateOther((unsigned char *)&pt->t,
+- sizeof
+- (yaffs_PackedTags2TagsPart),
+- &ecc);
+- result =
+- yaffs_ECCCorrectOther((unsigned char *)&pt->t,
+- sizeof
+- (yaffs_PackedTags2TagsPart),
+- &pt->ecc, &ecc);
+- switch (result) {
++ if (pt->t.sequenceNumber != 0xFFFFFFFF &&
++ tagsECC){
++ /* Chunk is in use and we need to do ECC */
++
++ yaffs_ECCOther ecc;
++ int result;
++ yaffs_ECCCalculateOther((unsigned char *)&pt->t,
++ sizeof(yaffs_PackedTags2TagsPart),
++ &ecc);
++ result = yaffs_ECCCorrectOther((unsigned char *)&pt->t,
++ sizeof(yaffs_PackedTags2TagsPart),
++ &pt->ecc, &ecc);
++ switch (result) {
+ case 0:
+ eccResult = YAFFS_ECC_RESULT_NO_ERROR;
+ break;
+@@ -190,9 +185,7 @@ void yaffs_UnpackTags2(yaffs_ExtendedTag
+ break;
+ default:
+ eccResult = YAFFS_ECC_RESULT_UNKNOWN;
+- }
+ }
+-#endif
+ }
+
+ yaffs_UnpackTags2TagsPart(t, &pt->t);
+@@ -201,6 +194,5 @@ void yaffs_UnpackTags2(yaffs_ExtendedTag
+
+ yaffs_DumpPackedTags2(pt);
+ yaffs_DumpTags2(t);
+-
+ }
+
+diff -Nrup a/fs/yaffs2/yaffs_packedtags2.h b/fs/yaffs2/yaffs_packedtags2.h
+--- a/fs/yaffs2/yaffs_packedtags2.h 2010-10-03 17:48:22.722000365 +0300
++++ b/fs/yaffs2/yaffs_packedtags2.h 2010-10-03 18:03:47.547000363 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -34,8 +34,8 @@ typedef struct {
+ } yaffs_PackedTags2;
+
+ /* Full packed tags with ECC, used for oob tags */
+-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t);
+-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt);
++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t, int tagsECC);
++void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt, int tagsECC);
+
+ /* Only the tags part (no ECC for use with inband tags */
+ void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ExtendedTags *t);
+diff -Nrup a/fs/yaffs2/yaffs_qsort.h b/fs/yaffs2/yaffs_qsort.h
+--- a/fs/yaffs2/yaffs_qsort.h 2010-10-03 17:48:22.724000363 +0300
++++ b/fs/yaffs2/yaffs_qsort.h 2010-10-03 18:03:47.548000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -17,7 +17,18 @@
+ #ifndef __YAFFS_QSORT_H__
+ #define __YAFFS_QSORT_H__
+
++#ifdef __KERNEL__
++#include <linux/sort.h>
++
++extern void yaffs_qsort(void *const base, size_t total_elems, size_t size,
++ int (*cmp)(const void *, const void *)){
++ sort(base, total_elems, size, cmp, NULL);
++}
++
++#else
++
+ extern void yaffs_qsort(void *const base, size_t total_elems, size_t size,
+ int (*cmp)(const void *, const void *));
+
+ #endif
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_tagscompat.c b/fs/yaffs2/yaffs_tagscompat.c
+--- a/fs/yaffs2/yaffs_tagscompat.c 2010-10-03 17:48:22.724000363 +0300
++++ b/fs/yaffs2/yaffs_tagscompat.c 2010-10-03 18:03:47.525000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -15,6 +15,7 @@
+ #include "yaffs_tagscompat.h"
+ #include "yaffs_ecc.h"
+ #include "yaffs_getblockinfo.h"
++#include "yaffs_trace.h"
+
+ static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND);
+ #ifdef NOTYET
+@@ -163,15 +164,14 @@ static int yaffs_WriteChunkToNAND(struct
+ int chunkInNAND, const __u8 *data,
+ yaffs_Spare *spare)
+ {
+- if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) {
++ if (chunkInNAND < dev->param.startBlock * dev->param.nChunksPerBlock) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("**>> yaffs chunk %d is not valid" TENDSTR),
+ chunkInNAND));
+ return YAFFS_FAIL;
+ }
+
+- dev->nPageWrites++;
+- return dev->writeChunkToNAND(dev, chunkInNAND, data, spare);
++ return dev->param.writeChunkToNAND(dev, chunkInNAND, data, spare);
+ }
+
+ static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
+@@ -184,16 +184,14 @@ static int yaffs_ReadChunkFromNAND(struc
+ int retVal;
+ yaffs_Spare localSpare;
+
+- dev->nPageReads++;
+-
+ if (!spare && data) {
+ /* If we don't have a real spare, then we use a local one. */
+ /* Need this for the calculation of the ecc */
+ spare = &localSpare;
+ }
+
+- if (!dev->useNANDECC) {
+- retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare);
++ if (!dev->param.useNANDECC) {
++ retVal = dev->param.readChunkFromNAND(dev, chunkInNAND, data, spare);
+ if (data && doErrorCorrection) {
+ /* Do ECC correction */
+ /* Todo handle any errors */
+@@ -254,7 +252,7 @@ static int yaffs_ReadChunkFromNAND(struc
+
+ memset(&nspare, 0, sizeof(nspare));
+
+- retVal = dev->readChunkFromNAND(dev, chunkInNAND, data,
++ retVal = dev->param.readChunkFromNAND(dev, chunkInNAND, data,
+ (yaffs_Spare *) &nspare);
+ memcpy(spare, &nspare, sizeof(yaffs_Spare));
+ if (data && doErrorCorrection) {
+@@ -307,10 +305,10 @@ static int yaffs_CheckChunkErased(struct
+ static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK];
+ static __u8 data[YAFFS_BYTES_PER_CHUNK];
+ /* Might as well always allocate the larger size for */
+- /* dev->useNANDECC == true; */
++ /* dev->param.useNANDECC == true; */
+ static __u8 spare[sizeof(struct yaffs_NANDSpare)];
+
+- dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare);
++ dev->param.readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare);
+
+ if (!init) {
+ memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK);
+@@ -333,7 +331,7 @@ static int yaffs_CheckChunkErased(struct
+
+ static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND)
+ {
+- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
++ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
+
+ /* Mark the block for retirement */
+ yaffs_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1;
+@@ -365,7 +363,7 @@ static void yaffs_HandleUpdateChunk(yaff
+
+ static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND)
+ {
+- int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
++ int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
+
+ /* Mark the block for retirement */
+ yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1;
+@@ -424,7 +422,7 @@ int yaffs_TagsCompatabilityWriteChunkWit
+
+ tags.serialNumber = eTags->serialNumber;
+
+- if (!dev->useNANDECC && data)
++ if (!dev->param.useNANDECC && data)
+ yaffs_CalcECC(data, &spare);
+
+ yaffs_LoadTagsIntoSpare(&spare, &tags);
+@@ -498,9 +496,9 @@ int yaffs_TagsCompatabilityMarkNANDBlock
+
+ spare.blockStatus = 'Y';
+
+- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL,
++ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->param.nChunksPerBlock, NULL,
+ &spare);
+- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1,
++ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->param.nChunksPerBlock + 1,
+ NULL, &spare);
+
+ return YAFFS_OK;
+@@ -525,9 +523,9 @@ int yaffs_TagsCompatabilityQueryNANDBloc
+
+ *sequenceNumber = 0;
+
+- yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL,
++ yaffs_ReadChunkFromNAND(dev, blockNo * dev->param.nChunksPerBlock, NULL,
+ &spare0, &dummy, 1);
+- yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL,
++ yaffs_ReadChunkFromNAND(dev, blockNo * dev->param.nChunksPerBlock + 1, NULL,
+ &spare1, &dummy, 1);
+
+ if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
+diff -Nrup a/fs/yaffs2/yaffs_tagscompat.h b/fs/yaffs2/yaffs_tagscompat.h
+--- a/fs/yaffs2/yaffs_tagscompat.h 2010-10-03 17:48:22.724000363 +0300
++++ b/fs/yaffs2/yaffs_tagscompat.h 2010-10-03 18:03:47.548000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_tagsvalidity.c b/fs/yaffs2/yaffs_tagsvalidity.c
+--- a/fs/yaffs2/yaffs_tagsvalidity.c 2010-10-03 17:48:22.725000363 +0300
++++ b/fs/yaffs2/yaffs_tagsvalidity.c 2010-10-03 18:03:47.526000362 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_tagsvalidity.h b/fs/yaffs2/yaffs_tagsvalidity.h
+--- a/fs/yaffs2/yaffs_tagsvalidity.h 2010-10-03 17:48:22.725000363 +0300
++++ b/fs/yaffs2/yaffs_tagsvalidity.h 2010-10-03 18:03:47.549000359 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+diff -Nrup a/fs/yaffs2/yaffs_trace.h b/fs/yaffs2/yaffs_trace.h
+--- a/fs/yaffs2/yaffs_trace.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_trace.h 2010-10-03 18:03:47.550000362 +0300
+@@ -0,0 +1,60 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++
++#ifndef __YTRACE_H__
++#define __YTRACE_H__
++
++extern unsigned int yaffs_traceMask;
++extern unsigned int yaffs_wr_attempts;
++
++/*
++ * Tracing flags.
++ * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
++ */
++
++#define YAFFS_TRACE_OS 0x00000002
++#define YAFFS_TRACE_ALLOCATE 0x00000004
++#define YAFFS_TRACE_SCAN 0x00000008
++#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
++#define YAFFS_TRACE_ERASE 0x00000020
++#define YAFFS_TRACE_GC 0x00000040
++#define YAFFS_TRACE_WRITE 0x00000080
++#define YAFFS_TRACE_TRACING 0x00000100
++#define YAFFS_TRACE_DELETION 0x00000200
++#define YAFFS_TRACE_BUFFERS 0x00000400
++#define YAFFS_TRACE_NANDACCESS 0x00000800
++#define YAFFS_TRACE_GC_DETAIL 0x00001000
++#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
++#define YAFFS_TRACE_MTD 0x00004000
++#define YAFFS_TRACE_CHECKPOINT 0x00008000
++
++#define YAFFS_TRACE_VERIFY 0x00010000
++#define YAFFS_TRACE_VERIFY_NAND 0x00020000
++#define YAFFS_TRACE_VERIFY_FULL 0x00040000
++#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
++
++#define YAFFS_TRACE_SYNC 0x00100000
++#define YAFFS_TRACE_BACKGROUND 0x00200000
++#define YAFFS_TRACE_LOCK 0x00400000
++
++#define YAFFS_TRACE_ERROR 0x40000000
++#define YAFFS_TRACE_BUG 0x80000000
++#define YAFFS_TRACE_ALWAYS 0xF0000000
++
++
++#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_verify.c b/fs/yaffs2/yaffs_verify.c
+--- a/fs/yaffs2/yaffs_verify.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_verify.c 2010-10-03 18:03:47.527000365 +0300
+@@ -0,0 +1,626 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++
++#include "yaffs_verify.h"
++#include "yaffs_trace.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_getblockinfo.h"
++#include "yaffs_nand.h"
++
++int yaffs_SkipVerification(yaffs_Device *dev)
++{
++ dev=dev;
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
++}
++
++static int yaffs_SkipFullVerification(yaffs_Device *dev)
++{
++ dev=dev;
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
++}
++
++static int yaffs_SkipNANDVerification(yaffs_Device *dev)
++{
++ dev=dev;
++ return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
++}
++
++
++static const char *blockStateName[] = {
++"Unknown",
++"Needs scanning",
++"Scanning",
++"Empty",
++"Allocating",
++"Full",
++"Dirty",
++"Checkpoint",
++"Collecting",
++"Dead"
++};
++
++
++void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
++{
++ int actuallyUsed;
++ int inUse;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ /* Report illegal runtime states */
++ if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
++
++ switch (bi->blockState) {
++ case YAFFS_BLOCK_STATE_UNKNOWN:
++ case YAFFS_BLOCK_STATE_SCANNING:
++ case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
++ n, blockStateName[bi->blockState]));
++ }
++
++ /* Check pages in use and soft deletions are legal */
++
++ actuallyUsed = bi->pagesInUse - bi->softDeletions;
++
++ if (bi->pagesInUse < 0 || bi->pagesInUse > dev->param.nChunksPerBlock ||
++ bi->softDeletions < 0 || bi->softDeletions > dev->param.nChunksPerBlock ||
++ actuallyUsed < 0 || actuallyUsed > dev->param.nChunksPerBlock)
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
++ n, bi->pagesInUse, bi->softDeletions));
++
++
++ /* Check chunk bitmap legal */
++ inUse = yaffs_CountChunkBits(dev, n);
++ if (inUse != bi->pagesInUse)
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
++ n, bi->pagesInUse, inUse));
++
++}
++
++
++
++void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
++{
++ yaffs_VerifyBlock(dev, bi, n);
++
++ /* After collection the block should be in the erased state */
++
++ if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
++ bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
++ T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
++ n, bi->blockState));
++ }
++}
++
++void yaffs_VerifyBlocks(yaffs_Device *dev)
++{
++ int i;
++ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
++ int nIllegalBlockStates = 0;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
++
++ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
++ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
++ yaffs_VerifyBlock(dev, bi, i);
++
++ if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
++ nBlocksPerState[bi->blockState]++;
++ else
++ nIllegalBlockStates++;
++ }
++
++ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++ T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
++
++ T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
++ if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
++ T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
++
++ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("%s %d blocks"TENDSTR),
++ blockStateName[i], nBlocksPerState[i]));
++
++ if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
++ dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
++
++ if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
++ dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
++
++ if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
++ nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
++
++ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
++
++}
++
++/*
++ * Verify the object header. oh must be valid, but obj and tags may be NULL in which
++ * case those tests will not be performed.
++ */
++void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
++{
++ if (obj && yaffs_SkipVerification(obj->myDev))
++ return;
++
++ if (!(tags && obj && oh)) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
++ tags, obj, oh));
++ return;
++ }
++
++ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
++ oh->type > YAFFS_OBJECT_TYPE_MAX)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
++ tags->objectId, oh->type));
++
++ if (tags->objectId != obj->objectId)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
++ tags->objectId, obj->objectId));
++
++
++ /*
++ * Check that the object's parent ids match if parentCheck requested.
++ *
++ * Tests do not apply to the root object.
++ */
++
++ if (parentCheck && tags->objectId > 1 && !obj->parent)
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
++ tags->objectId, oh->parentObjectId));
++
++ if (parentCheck && obj->parent &&
++ oh->parentObjectId != obj->parent->objectId &&
++ (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
++ obj->parent->objectId != YAFFS_OBJECTID_DELETED))
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
++ tags->objectId, oh->parentObjectId, obj->parent->objectId));
++
++ if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header name is NULL"TENDSTR),
++ obj->objectId));
++
++ if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d header name is 0xFF"TENDSTR),
++ obj->objectId));
++}
++
++
++#if 0
++/* Not being used, but don't want to throw away yet */
++int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
++ __u32 level, int chunkOffset)
++{
++ int i;
++ yaffs_Device *dev = obj->myDev;
++ int ok = 1;
++
++ if (tn) {
++ if (level > 0) {
++
++ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
++ if (tn->internal[i]) {
++ ok = yaffs_VerifyTnodeWorker(obj,
++ tn->internal[i],
++ level - 1,
++ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
++ }
++ }
++ } else if (level == 0) {
++ yaffs_ExtendedTags tags;
++ __u32 objectId = obj->objectId;
++
++ chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
++
++ for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
++ __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++
++ if (theChunk > 0) {
++ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
++ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
++ if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
++ T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
++ objectId, chunkOffset, theChunk,
++ tags.objectId, tags.chunkId));
++ }
++ }
++ chunkOffset++;
++ }
++ }
++ }
++
++ return ok;
++
++}
++
++#endif
++
++void yaffs_VerifyFile(yaffs_Object *obj)
++{
++ int requiredTallness;
++ int actualTallness;
++ __u32 lastChunk;
++ __u32 x;
++ __u32 i;
++ yaffs_Device *dev;
++ yaffs_ExtendedTags tags;
++ yaffs_Tnode *tn;
++ __u32 objectId;
++
++ if (!obj)
++ return;
++
++ if (yaffs_SkipVerification(obj->myDev))
++ return;
++
++ dev = obj->myDev;
++ objectId = obj->objectId;
++
++ /* Check file size is consistent with tnode depth */
++ lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
++ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
++ requiredTallness = 0;
++ while (x > 0) {
++ x >>= YAFFS_TNODES_INTERNAL_BITS;
++ requiredTallness++;
++ }
++
++ actualTallness = obj->variant.fileVariant.topLevel;
++
++ /* Check that the chunks in the tnode tree are all correct.
++ * We do this by scanning through the tnode tree and
++ * checking the tags for every chunk match.
++ */
++
++ if (yaffs_SkipNANDVerification(dev))
++ return;
++
++ for (i = 1; i <= lastChunk; i++) {
++ tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
++
++ if (tn) {
++ __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
++ if (theChunk > 0) {
++ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
++ yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
++ if (tags.objectId != objectId || tags.chunkId != i) {
++ T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
++ objectId, i, theChunk,
++ tags.objectId, tags.chunkId));
++ }
++ }
++ }
++ }
++}
++
++
++void yaffs_VerifyHardLink(yaffs_Object *obj)
++{
++ if (obj && yaffs_SkipVerification(obj->myDev))
++ return;
++
++ /* Verify sane equivalent object */
++}
++
++void yaffs_VerifySymlink(yaffs_Object *obj)
++{
++ if (obj && yaffs_SkipVerification(obj->myDev))
++ return;
++
++ /* Verify symlink string */
++}
++
++void yaffs_VerifySpecial(yaffs_Object *obj)
++{
++ if (obj && yaffs_SkipVerification(obj->myDev))
++ return;
++}
++
++void yaffs_VerifyObject(yaffs_Object *obj)
++{
++ yaffs_Device *dev;
++
++ __u32 chunkMin;
++ __u32 chunkMax;
++
++ __u32 chunkIdOk;
++ __u32 chunkInRange;
++ __u32 chunkShouldNotBeDeleted;
++ __u32 chunkValid;
++
++ if (!obj)
++ return;
++
++ if (obj->beingCreated)
++ return;
++
++ dev = obj->myDev;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ /* Check sane object header chunk */
++
++ chunkMin = dev->internalStartBlock * dev->param.nChunksPerBlock;
++ chunkMax = (dev->internalEndBlock+1) * dev->param.nChunksPerBlock - 1;
++
++ chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
++ chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
++ chunkValid = chunkInRange &&
++ yaffs_CheckChunkBit(dev,
++ obj->hdrChunk / dev->param.nChunksPerBlock,
++ obj->hdrChunk % dev->param.nChunksPerBlock);
++ chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
++
++ if (!obj->fake &&
++ (!chunkIdOk || chunkShouldNotBeDeleted)) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
++ obj->objectId, obj->hdrChunk,
++ chunkIdOk ? "" : ",out of range",
++ chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
++ }
++
++ if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
++ yaffs_ExtendedTags tags;
++ yaffs_ObjectHeader *oh;
++ __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
++
++ oh = (yaffs_ObjectHeader *)buffer;
++
++ yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
++ &tags);
++
++ yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
++
++ yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
++ }
++
++ /* Verify it has a parent */
++ if (obj && !obj->fake &&
++ (!obj->parent || obj->parent->myDev != dev)) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
++ obj->objectId, obj->parent));
++ }
++
++ /* Verify parent is a directory */
++ if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
++ obj->objectId, obj->parent->variantType));
++ }
++
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ yaffs_VerifyFile(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ yaffs_VerifySymlink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ yaffs_VerifyDirectory(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ yaffs_VerifyHardLink(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ yaffs_VerifySpecial(obj);
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ default:
++ T(YAFFS_TRACE_VERIFY,
++ (TSTR("Obj %d has illegaltype %d"TENDSTR),
++ obj->objectId, obj->variantType));
++ break;
++ }
++}
++
++void yaffs_VerifyObjects(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ int i;
++ struct ylist_head *lh;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ /* Iterate through the objects in each hash entry */
++
++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
++ ylist_for_each(lh, &dev->objectBucket[i].list) {
++ if (lh) {
++ obj = ylist_entry(lh, yaffs_Object, hashLink);
++ yaffs_VerifyObject(obj);
++ }
++ }
++ }
++}
++
++
++void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
++{
++ struct ylist_head *lh;
++ yaffs_Object *listObj;
++
++ int count = 0;
++
++ if (!obj) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
++ YBUG();
++ return;
++ }
++
++ if (yaffs_SkipVerification(obj->myDev))
++ return;
++
++ if (!obj->parent) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
++ YBUG();
++ return;
++ }
++
++ if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
++ YBUG();
++ }
++
++ /* Iterate through the objects in each hash entry */
++
++ ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
++ if (lh) {
++ listObj = ylist_entry(lh, yaffs_Object, siblings);
++ yaffs_VerifyObject(listObj);
++ if (obj == listObj)
++ count++;
++ }
++ }
++
++ if (count != 1) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
++ YBUG();
++ }
++}
++
++void yaffs_VerifyDirectory(yaffs_Object *directory)
++{
++ struct ylist_head *lh;
++ yaffs_Object *listObj;
++
++ if (!directory) {
++ YBUG();
++ return;
++ }
++
++ if (yaffs_SkipFullVerification(directory->myDev))
++ return;
++
++ if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
++ YBUG();
++ }
++
++ /* Iterate through the objects in each hash entry */
++
++ ylist_for_each(lh, &directory->variant.directoryVariant.children) {
++ if (lh) {
++ listObj = ylist_entry(lh, yaffs_Object, siblings);
++ if (listObj->parent != directory) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
++ YBUG();
++ }
++ yaffs_VerifyObjectInDirectory(listObj);
++ }
++ }
++}
++
++static int yaffs_freeVerificationFailures;
++
++void yaffs_VerifyFreeChunks(yaffs_Device *dev)
++{
++ int counted;
++ int difference;
++
++ if (yaffs_SkipVerification(dev))
++ return;
++
++ counted = yaffs_CountFreeChunks(dev);
++
++ difference = dev->nFreeChunks - counted;
++
++ if (difference) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
++ dev->nFreeChunks, counted, difference));
++ yaffs_freeVerificationFailures++;
++ }
++}
++
++int yaffs_VerifyFileSanity(yaffs_Object *in)
++{
++#if 0
++ int chunk;
++ int nChunks;
++ int fSize;
++ int failed = 0;
++ int objId;
++ yaffs_Tnode *tn;
++ yaffs_Tags localTags;
++ yaffs_Tags *tags = &localTags;
++ int theChunk;
++ int chunkDeleted;
++
++ if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
++ return YAFFS_FAIL;
++
++ objId = in->objectId;
++ fSize = in->variant.fileVariant.fileSize;
++ nChunks =
++ (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
++
++ for (chunk = 1; chunk <= nChunks; chunk++) {
++ tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
++ chunk);
++
++ if (tn) {
++
++ theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
++
++ if (yaffs_CheckChunkBits
++ (dev, theChunk / dev->param.nChunksPerBlock,
++ theChunk % dev->param.nChunksPerBlock)) {
++
++ yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
++ tags,
++ &chunkDeleted);
++ if (yaffs_TagsMatch
++ (tags, in->objectId, chunk, chunkDeleted)) {
++ /* found it; */
++
++ }
++ } else {
++
++ failed = 1;
++ }
++
++ } else {
++ /* T(("No level 0 found for %d\n", chunk)); */
++ }
++ }
++
++ return failed ? YAFFS_FAIL : YAFFS_OK;
++#else
++ in=in;
++ return YAFFS_OK;
++#endif
++}
+diff -Nrup a/fs/yaffs2/yaffs_verify.h b/fs/yaffs2/yaffs_verify.h
+--- a/fs/yaffs2/yaffs_verify.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_verify.h 2010-10-03 18:03:47.551000365 +0300
+@@ -0,0 +1,39 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#ifndef __YAFFS_VERIFY_H__
++#define __YAFFS_VERIFY_H__
++
++#include "yaffs_guts.h"
++
++void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n);
++void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n);
++void yaffs_VerifyBlocks(yaffs_Device *dev);
++
++void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck);
++void yaffs_VerifyFile(yaffs_Object *obj);
++void yaffs_VerifyHardLink(yaffs_Object *obj);
++void yaffs_VerifySymlink(yaffs_Object *obj);
++void yaffs_VerifySpecial(yaffs_Object *obj);
++void yaffs_VerifyObject(yaffs_Object *obj);
++void yaffs_VerifyObjects(yaffs_Device *dev);
++void yaffs_VerifyObjectInDirectory(yaffs_Object *obj);
++void yaffs_VerifyDirectory(yaffs_Object *directory);
++void yaffs_VerifyFreeChunks(yaffs_Device *dev);
++
++int yaffs_VerifyFileSanity(yaffs_Object *obj);
++
++int yaffs_SkipVerification(yaffs_Device *dev);
++
++#endif
++
+diff -Nrup a/fs/yaffs2/yaffs_vfs_glue.c b/fs/yaffs2/yaffs_vfs_glue.c
+--- a/fs/yaffs2/yaffs_vfs_glue.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_vfs_glue.c 2010-10-03 18:03:47.557000359 +0300
+@@ -0,0 +1,3577 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ * Acknowledgements:
++ * Luc van OostenRyck for numerous patches.
++ * Nick Bane for numerous patches.
++ * Nick Bane for 2.5/2.6 integration.
++ * Andras Toth for mknod rdev issue.
++ * Michael Fischer for finding the problem with inode inconsistency.
++ * Some code bodily lifted from JFFS
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++/*
++ *
++ * This is the file system front-end to YAFFS that hooks it up to
++ * the VFS.
++ *
++ * Special notes:
++ * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
++ * this superblock
++ * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
++ * superblock
++ * >> inode->u.generic_ip points to the associated yaffs_Object.
++ */
++
++/*
++ * There are two variants of the VFS glue code. This variant should compile
++ * for any version of Linux.
++ */
++#include <linux/version.h>
++
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
++#define YAFFS_COMPILE_BACKGROUND
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6, 23))
++#define YAFFS_COMPILE_FREEZER
++#endif
++#endif
++
++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
++#define YAFFS_COMPILE_EXPORTFS
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
++#define YAFFS_USE_SETATTR_COPY
++#define YAFFS_USE_TRUNCATE_SETSIZE
++#endif
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
++#define YAFFS_HAS_EVICT_INODE
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
++#define YAFFS_NEW_FOLLOW_LINK 1
++#else
++#define YAFFS_NEW_FOLLOW_LINK 0
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
++#include <linux/config.h>
++#endif
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/fs.h>
++#include <linux/proc_fs.h>
++#include <linux/smp_lock.h>
++#include <linux/pagemap.h>
++#include <linux/mtd/mtd.h>
++#include <linux/interrupt.h>
++#include <linux/string.h>
++#include <linux/ctype.h>
++
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++#include <linux/namei.h>
++#endif
++
++#ifdef YAFFS_COMPILE_EXPORTFS
++#include <linux/exportfs.h>
++#endif
++
++#ifdef YAFFS_COMPILE_BACKGROUND
++#include <linux/kthread.h>
++#include <linux/delay.h>
++#endif
++#ifdef YAFFS_COMPILE_FREEZER
++#include <linux/freezer.h>
++#endif
++
++#include <asm/div64.h>
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++#include <linux/statfs.h>
++
++#define UnlockPage(p) unlock_page(p)
++#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
++
++/* FIXME: use sb->s_id instead ? */
++#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
++
++#else
++
++#include <linux/locks.h>
++#define BDEVNAME_SIZE 0
++#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0))
++/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
++#define __user
++#endif
++
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26))
++#define YPROC_ROOT (&proc_root)
++#else
++#define YPROC_ROOT NULL
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
++#define Y_INIT_TIMER(a) init_timer(a)
++#else
++#define Y_INIT_TIMER(a) init_timer_on_stack(a)
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++#define WRITE_SIZE_STR "writesize"
++#define WRITE_SIZE(mtd) ((mtd)->writesize)
++#else
++#define WRITE_SIZE_STR "oobblock"
++#define WRITE_SIZE(mtd) ((mtd)->oobblock)
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
++#define YAFFS_USE_WRITE_BEGIN_END 1
++#else
++#define YAFFS_USE_WRITE_BEGIN_END 0
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
++static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
++{
++ uint64_t result = partition_size;
++ do_div(result, block_size);
++ return (uint32_t)result;
++}
++#else
++#define YCALCBLOCKS(s, b) ((s)/(b))
++#endif
++
++#include <linux/uaccess.h>
++#include <linux/mtd/mtd.h>
++
++#include "yportenv.h"
++#include "yaffs_trace.h"
++#include "yaffs_guts.h"
++
++#include "yaffs_linux.h"
++
++#include "yaffs_mtdif.h"
++#include "yaffs_mtdif1.h"
++#include "yaffs_mtdif2.h"
++
++unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS;
++unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
++unsigned int yaffs_auto_checkpoint = 1;
++unsigned int yaffs_gc_control = 1;
++unsigned int yaffs_bg_enable = 1;
++
++/* Module Parameters */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++module_param(yaffs_traceMask, uint, 0644);
++module_param(yaffs_wr_attempts, uint, 0644);
++module_param(yaffs_auto_checkpoint, uint, 0644);
++module_param(yaffs_gc_control, uint, 0644);
++module_param(yaffs_bg_enable, uint, 0644);
++#else
++MODULE_PARM(yaffs_traceMask, "i");
++MODULE_PARM(yaffs_wr_attempts, "i");
++MODULE_PARM(yaffs_auto_checkpoint, "i");
++MODULE_PARM(yaffs_gc_control, "i");
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
++/* use iget and read_inode */
++#define Y_IGET(sb, inum) iget((sb), (inum))
++static void yaffs_read_inode(struct inode *inode);
++
++#else
++/* Call local equivalent */
++#define YAFFS_USE_OWN_IGET
++#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
++
++static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
++#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private)
++#else
++#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip)
++#endif
++
++#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
++#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
++#else
++#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
++#endif
++
++
++#define update_dir_time(dir) do {\
++ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
++ } while(0)
++
++static void yaffs_put_super(struct super_block *sb);
++
++static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
++ loff_t *pos);
++static ssize_t yaffs_hold_space(struct file *f);
++static void yaffs_release_space(struct file *f);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_file_flush(struct file *file, fl_owner_t id);
++#else
++static int yaffs_file_flush(struct file *file);
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
++static int yaffs_sync_object(struct file *file, int datasync);
++#else
++static int yaffs_sync_object(struct file *file, struct dentry *dentry,
++ int datasync);
++#endif
++
++static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
++ struct nameidata *n);
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
++ struct nameidata *n);
++#else
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
++#endif
++static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
++ struct dentry *dentry);
++static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
++static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
++ const char *symname);
++static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++ dev_t dev);
++#else
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++ int dev);
++#endif
++static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
++ struct inode *new_dir, struct dentry *new_dentry);
++static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_sync_fs(struct super_block *sb, int wait);
++static void yaffs_write_super(struct super_block *sb);
++#else
++static int yaffs_sync_fs(struct super_block *sb);
++static int yaffs_write_super(struct super_block *sb);
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
++#else
++static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
++#endif
++
++#ifdef YAFFS_HAS_PUT_INODE
++static void yaffs_put_inode(struct inode *inode);
++#endif
++
++#ifdef YAFFS_HAS_EVICT_INODE
++static void yaffs_evict_inode(struct inode *);
++#else
++static void yaffs_delete_inode(struct inode *);
++static void yaffs_clear_inode(struct inode *);
++#endif
++
++static int yaffs_readpage(struct file *file, struct page *page);
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
++#else
++static int yaffs_writepage(struct page *page);
++#endif
++
++#ifdef CONFIG_YAFFS_XATTR
++int yaffs_setxattr(struct dentry *dentry, const char *name,
++ const void *value, size_t size, int flags);
++ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
++ size_t size);
++int yaffs_removexattr(struct dentry *dentry, const char *name);
++ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
++#endif
++
++
++#if (YAFFS_USE_WRITE_BEGIN_END != 0)
++static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned flags,
++ struct page **pagep, void **fsdata);
++static int yaffs_write_end(struct file *filp, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned copied,
++ struct page *pg, void *fsdadata);
++#else
++static int yaffs_prepare_write(struct file *f, struct page *pg,
++ unsigned offset, unsigned to);
++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
++ unsigned to);
++
++#endif
++
++static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
++ int buflen);
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
++#else
++static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
++#endif
++
++static void yaffs_MarkSuperBlockDirty(yaffs_Device *dev);
++
++static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin);
++
++static int yaffs_vfs_setattr(struct inode *, struct iattr *);
++
++
++static struct address_space_operations yaffs_file_address_operations = {
++ .readpage = yaffs_readpage,
++ .writepage = yaffs_writepage,
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++ .write_begin = yaffs_write_begin,
++ .write_end = yaffs_write_end,
++#else
++ .prepare_write = yaffs_prepare_write,
++ .commit_write = yaffs_commit_write,
++#endif
++};
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
++static const struct file_operations yaffs_file_operations = {
++ .read = do_sync_read,
++ .write = do_sync_write,
++ .aio_read = generic_file_aio_read,
++ .aio_write = generic_file_aio_write,
++ .mmap = generic_file_mmap,
++ .flush = yaffs_file_flush,
++ .fsync = yaffs_sync_object,
++ .splice_read = generic_file_splice_read,
++ .splice_write = generic_file_splice_write,
++ .llseek = generic_file_llseek,
++};
++
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
++
++static const struct file_operations yaffs_file_operations = {
++ .read = do_sync_read,
++ .write = do_sync_write,
++ .aio_read = generic_file_aio_read,
++ .aio_write = generic_file_aio_write,
++ .mmap = generic_file_mmap,
++ .flush = yaffs_file_flush,
++ .fsync = yaffs_sync_object,
++ .sendfile = generic_file_sendfile,
++};
++
++#else
++
++static const struct file_operations yaffs_file_operations = {
++ .read = generic_file_read,
++ .write = generic_file_write,
++ .mmap = generic_file_mmap,
++ .flush = yaffs_file_flush,
++ .fsync = yaffs_sync_object,
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ .sendfile = generic_file_sendfile,
++#endif
++};
++#endif
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
++static void zero_user_segment(struct page *page, unsigned start, unsigned end)
++{
++ void * kaddr = kmap_atomic(page, KM_USER0);
++ memset(kaddr + start, 0, end - start);
++ kunmap_atomic(kaddr, KM_USER0);
++ flush_dcache_page(page);
++}
++#endif
++
++
++static const struct inode_operations yaffs_file_inode_operations = {
++ .setattr = yaffs_setattr,
++#ifdef CONFIG_YAFFS_XATTR
++ .setxattr = yaffs_setxattr,
++ .getxattr = yaffs_getxattr,
++ .listxattr = yaffs_listxattr,
++ .removexattr = yaffs_removexattr,
++#endif
++};
++
++static const struct inode_operations yaffs_symlink_inode_operations = {
++ .readlink = yaffs_readlink,
++ .follow_link = yaffs_follow_link,
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++ .put_link = yaffs_put_link,
++#endif
++ .setattr = yaffs_setattr,
++#ifdef CONFIG_YAFFS_XATTR
++ .setxattr = yaffs_setxattr,
++ .getxattr = yaffs_getxattr,
++ .listxattr = yaffs_listxattr,
++ .removexattr = yaffs_removexattr,
++#endif
++};
++
++static const struct inode_operations yaffs_dir_inode_operations = {
++ .create = yaffs_create,
++ .lookup = yaffs_lookup,
++ .link = yaffs_link,
++ .unlink = yaffs_unlink,
++ .symlink = yaffs_symlink,
++ .mkdir = yaffs_mkdir,
++ .rmdir = yaffs_unlink,
++ .mknod = yaffs_mknod,
++ .rename = yaffs_rename,
++ .setattr = yaffs_setattr,
++#ifdef CONFIG_YAFFS_XATTR
++ .setxattr = yaffs_setxattr,
++ .getxattr = yaffs_getxattr,
++ .listxattr = yaffs_listxattr,
++ .removexattr = yaffs_removexattr,
++#endif
++};
++
++static const struct file_operations yaffs_dir_operations = {
++ .read = generic_read_dir,
++ .readdir = yaffs_readdir,
++ .fsync = yaffs_sync_object,
++ .llseek = yaffs_dir_llseek,
++};
++
++static const struct super_operations yaffs_super_ops = {
++ .statfs = yaffs_statfs,
++
++#ifndef YAFFS_USE_OWN_IGET
++ .read_inode = yaffs_read_inode,
++#endif
++#ifdef YAFFS_HAS_PUT_INODE
++ .put_inode = yaffs_put_inode,
++#endif
++ .put_super = yaffs_put_super,
++#ifdef YAFFS_HAS_EVICT_INODE
++ .evict_inode = yaffs_evict_inode,
++#else
++ .delete_inode = yaffs_delete_inode,
++ .clear_inode = yaffs_clear_inode,
++#endif
++ .sync_fs = yaffs_sync_fs,
++ .write_super = yaffs_write_super,
++};
++
++
++static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
++{
++#ifdef YAFFS_USE_SETATTR_COPY
++ setattr_copy(inode,attr);
++ return 0;
++#else
++ return inode_setattr(inode, attr);
++#endif
++
++}
++
++static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
++{
++#ifdef YAFFS_USE_TRUNCATE_SETSIZE
++ truncate_setsize(inode,newsize);
++ return 0;
++#else
++ truncate_inode_pages(&inode->i_data,newsize);
++ return 0;
++#endif
++
++}
++
++static unsigned yaffs_gc_control_callback(yaffs_Device *dev)
++{
++ return yaffs_gc_control;
++}
++
++static void yaffs_GrossLock(yaffs_Device *dev)
++{
++ T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
++ down(&(yaffs_DeviceToLC(dev)->grossLock));
++ T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
++}
++
++static void yaffs_GrossUnlock(yaffs_Device *dev)
++{
++ T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
++ up(&(yaffs_DeviceToLC(dev)->grossLock));
++}
++
++#ifdef YAFFS_COMPILE_EXPORTFS
++
++static struct inode *
++yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation)
++{
++ return Y_IGET(sb, ino);
++}
++
++static struct dentry *
++yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
++{
++ return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ;
++}
++
++static struct dentry *
++ yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
++{
++ return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode);
++}
++
++struct dentry *yaffs2_get_parent(struct dentry *dentry)
++{
++
++ struct super_block *sb = dentry->d_inode->i_sb;
++ struct dentry *parent = ERR_PTR(-ENOENT);
++ struct inode *inode;
++ unsigned long parent_ino;
++ yaffs_Object *d_obj;
++ yaffs_Object *parent_obj;
++
++ d_obj = yaffs_InodeToObject(dentry->d_inode);
++
++ if (d_obj) {
++ parent_obj = d_obj->parent;
++ if (parent_obj) {
++ parent_ino = yaffs_GetObjectInode(parent_obj);
++ inode = Y_IGET(sb, parent_ino);
++
++ if (IS_ERR(inode)) {
++ parent = ERR_CAST(inode);
++ } else {
++ parent = d_obtain_alias(inode);
++ if (!IS_ERR(parent)) {
++ parent = ERR_PTR(-ENOMEM);
++ iput(inode);
++ }
++ }
++ }
++ }
++
++ return parent;
++}
++
++/* Just declare a zero structure as a NULL value implies
++ * using the default functions of exportfs.
++ */
++
++static struct export_operations yaffs_export_ops =
++{
++ .fh_to_dentry = yaffs2_fh_to_dentry,
++ .fh_to_parent = yaffs2_fh_to_parent,
++ .get_parent = yaffs2_get_parent,
++} ;
++
++#endif
++
++/*-----------------------------------------------------------------*/
++/* Directory search context allows us to unlock access to yaffs during
++ * filldir without causing problems with the directory being modified.
++ * This is similar to the tried and tested mechanism used in yaffs direct.
++ *
++ * A search context iterates along a doubly linked list of siblings in the
++ * directory. If the iterating object is deleted then this would corrupt
++ * the list iteration, likely causing a crash. The search context avoids
++ * this by using the removeObjectCallback to move the search context to the
++ * next object before the object is deleted.
++ *
++ * Many readdirs (and thus seach conexts) may be alive simulateously so
++ * each yaffs_Device has a list of these.
++ *
++ * A seach context lives for the duration of a readdir.
++ *
++ * All these functions must be called while yaffs is locked.
++ */
++
++struct yaffs_SearchContext {
++ yaffs_Device *dev;
++ yaffs_Object *dirObj;
++ yaffs_Object *nextReturn;
++ struct ylist_head others;
++};
++
++/*
++ * yaffs_NewSearch() creates a new search context, initialises it and
++ * adds it to the device's search context list.
++ *
++ * Called at start of readdir.
++ */
++static struct yaffs_SearchContext * yaffs_NewSearch(yaffs_Object *dir)
++{
++ yaffs_Device *dev = dir->myDev;
++ struct yaffs_SearchContext *sc = YMALLOC(sizeof(struct yaffs_SearchContext));
++ if(sc){
++ sc->dirObj = dir;
++ sc->dev = dev;
++ if( ylist_empty(&sc->dirObj->variant.directoryVariant.children))
++ sc->nextReturn = NULL;
++ else
++ sc->nextReturn = ylist_entry(
++ dir->variant.directoryVariant.children.next,
++ yaffs_Object,siblings);
++ YINIT_LIST_HEAD(&sc->others);
++ ylist_add(&sc->others,&(yaffs_DeviceToLC(dev)->searchContexts));
++ }
++ return sc;
++}
++
++/*
++ * yaffs_EndSearch() disposes of a search context and cleans up.
++ */
++static void yaffs_EndSearch(struct yaffs_SearchContext * sc)
++{
++ if(sc){
++ ylist_del(&sc->others);
++ YFREE(sc);
++ }
++}
++
++/*
++ * yaffs_SearchAdvance() moves a search context to the next object.
++ * Called when the search iterates or when an object removal causes
++ * the search context to be moved to the next object.
++ */
++static void yaffs_SearchAdvance(struct yaffs_SearchContext *sc)
++{
++ if(!sc)
++ return;
++
++ if( sc->nextReturn == NULL ||
++ ylist_empty(&sc->dirObj->variant.directoryVariant.children))
++ sc->nextReturn = NULL;
++ else {
++ struct ylist_head *next = sc->nextReturn->siblings.next;
++
++ if( next == &sc->dirObj->variant.directoryVariant.children)
++ sc->nextReturn = NULL; /* end of list */
++ else
++ sc->nextReturn = ylist_entry(next,yaffs_Object,siblings);
++ }
++}
++
++/*
++ * yaffs_RemoveObjectCallback() is called when an object is unlinked.
++ * We check open search contexts and advance any which are currently
++ * on the object being iterated.
++ */
++static void yaffs_RemoveObjectCallback(yaffs_Object *obj)
++{
++
++ struct ylist_head *i;
++ struct yaffs_SearchContext *sc;
++ struct ylist_head *search_contexts = &(yaffs_DeviceToLC(obj->myDev)->searchContexts);
++
++
++ /* Iterate through the directory search contexts.
++ * If any are currently on the object being removed, then advance
++ * the search context to the next object to prevent a hanging pointer.
++ */
++ ylist_for_each(i, search_contexts) {
++ if (i) {
++ sc = ylist_entry(i, struct yaffs_SearchContext,others);
++ if(sc->nextReturn == obj)
++ yaffs_SearchAdvance(sc);
++ }
++ }
++
++}
++
++
++/*-----------------------------------------------------------------*/
++
++static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
++ int buflen)
++{
++ unsigned char *alias;
++ int ret;
++
++ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
++
++ yaffs_GrossLock(dev);
++
++ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
++
++ yaffs_GrossUnlock(dev);
++
++ if (!alias)
++ return -ENOMEM;
++
++ ret = vfs_readlink(dentry, buffer, buflen, alias);
++ kfree(alias);
++ return ret;
++}
++
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
++#else
++static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
++#endif
++{
++ unsigned char *alias;
++ int ret;
++ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
++
++ yaffs_GrossLock(dev);
++
++ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
++ yaffs_GrossUnlock(dev);
++
++ if (!alias) {
++ ret = -ENOMEM;
++ goto out;
++ }
++
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++ nd_set_link(nd, alias);
++ ret = (int)alias;
++out:
++ return ERR_PTR(ret);
++#else
++ ret = vfs_follow_link(nd, alias);
++ kfree(alias);
++out:
++ return ret;
++#endif
++}
++
++#if (YAFFS_NEW_FOLLOW_LINK == 1)
++void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) {
++ kfree(alias);
++}
++#endif
++
++struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
++ yaffs_Object *obj);
++
++/*
++ * Lookup is used to find objects in the fs
++ */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
++ struct nameidata *n)
++#else
++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
++#endif
++{
++ yaffs_Object *obj;
++ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
++
++ yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
++
++ if(current != yaffs_DeviceToLC(dev)->readdirProcess)
++ yaffs_GrossLock(dev);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_lookup for %d:%s\n"),
++ yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
++
++ obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),
++ dentry->d_name.name);
++
++ obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
++
++ /* Can't hold gross lock when calling yaffs_get_inode() */
++ if(current != yaffs_DeviceToLC(dev)->readdirProcess)
++ yaffs_GrossUnlock(dev);
++
++ if (obj) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_lookup found %d\n"), obj->objectId));
++
++ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
++
++ if (inode) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_loookup dentry \n")));
++/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
++ * d_add even if NULL inode */
++#if 0
++ /*dget(dentry); // try to solve directory bug */
++ d_add(dentry, inode);
++
++ /* return dentry; */
++ return NULL;
++#endif
++ }
++
++ } else {
++ T(YAFFS_TRACE_OS,(TSTR("yaffs_lookup not found\n")));
++
++ }
++
++/* added NCB for 2.5/6 compatability - forces add even if inode is
++ * NULL which creates dentry hash */
++ d_add(dentry, inode);
++
++ return NULL;
++}
++
++
++#ifdef YAFFS_HAS_PUT_INODE
++
++/* For now put inode is just for debugging
++ * Put inode is called when the inode **structure** is put.
++ */
++static void yaffs_put_inode(struct inode *inode)
++{
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_put_inode: ino %d, count %d\n"), (int)inode->i_ino,
++ atomic_read(&inode->i_count)));
++
++}
++#endif
++
++
++static void yaffs_UnstitchObject(struct inode *inode, yaffs_Object *obj)
++{
++ /* Clear the association between the inode and
++ * the yaffs_Object.
++ */
++ obj->myInode = NULL;
++ yaffs_InodeToObjectLV(inode) = NULL;
++
++ /* If the object freeing was deferred, then the real
++ * free happens now.
++ * This should fix the inode inconsistency problem.
++ */
++ yaffs_HandleDeferedFree(obj);
++}
++
++#ifdef YAFFS_HAS_EVICT_INODE
++/* yaffs_evict_inode combines into one operation what was previously done in
++ * yaffs_clear_inode() and yaffs_delete_inode()
++ *
++ */
++static void yaffs_evict_inode( struct inode *inode)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++ int deleteme = 0;
++
++ obj = yaffs_InodeToObject(inode);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_evict_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
++ atomic_read(&inode->i_count),
++ obj ? "object exists" : "null object"));
++
++ if (!inode->i_nlink && !is_bad_inode(inode))
++ deleteme = 1;
++ truncate_inode_pages(&inode->i_data,0);
++ end_writeback(inode);
++
++ if(deleteme && obj){
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ yaffs_DeleteObject(obj);
++ yaffs_GrossUnlock(dev);
++ }
++ if (obj) {
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ yaffs_UnstitchObject(inode,obj);
++ yaffs_GrossUnlock(dev);
++ }
++
++
++}
++#else
++
++/* clear is called to tell the fs to release any per-inode data it holds.
++ * The object might still exist on disk and is just being thrown out of the cache
++ * or else the object has actually been deleted and we're being called via
++ * the chain
++ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
++ */
++
++static void yaffs_clear_inode(struct inode *inode)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++
++ obj = yaffs_InodeToObject(inode);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_clear_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
++ atomic_read(&inode->i_count),
++ obj ? "object exists" : "null object"));
++
++ if (obj) {
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ yaffs_UnstitchObject(inode,obj);
++ yaffs_GrossUnlock(dev);
++ }
++
++}
++
++/* delete is called when the link count is zero and the inode
++ * is put (ie. nobody wants to know about it anymore, time to
++ * delete the file).
++ * NB Must call clear_inode()
++ */
++static void yaffs_delete_inode(struct inode *inode)
++{
++ yaffs_Object *obj = yaffs_InodeToObject(inode);
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_delete_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
++ atomic_read(&inode->i_count),
++ obj ? "object exists" : "null object"));
++
++ if (obj) {
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ yaffs_DeleteObject(obj);
++ yaffs_GrossUnlock(dev);
++ }
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
++ truncate_inode_pages(&inode->i_data, 0);
++#endif
++ clear_inode(inode);
++}
++#endif
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_file_flush(struct file *file, fl_owner_t id)
++#else
++static int yaffs_file_flush(struct file *file)
++#endif
++{
++ yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
++
++ yaffs_Device *dev = obj->myDev;
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_file_flush object %d (%s)\n"), obj->objectId,
++ obj->dirty ? "dirty" : "clean"));
++
++ yaffs_GrossLock(dev);
++
++ yaffs_FlushFile(obj, 1, 0);
++
++ yaffs_GrossUnlock(dev);
++
++ return 0;
++}
++
++static int yaffs_readpage_nolock(struct file *f, struct page *pg)
++{
++ /* Lifted from jffs2 */
++
++ yaffs_Object *obj;
++ unsigned char *pg_buf;
++ int ret;
++
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_readpage_nolock at %08x, size %08x\n"),
++ (unsigned)(pg->index << PAGE_CACHE_SHIFT),
++ (unsigned)PAGE_CACHE_SIZE));
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++
++ dev = obj->myDev;
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ BUG_ON(!PageLocked(pg));
++#else
++ if (!PageLocked(pg))
++ PAGE_BUG(pg);
++#endif
++
++ pg_buf = kmap(pg);
++ /* FIXME: Can kmap fail? */
++
++ yaffs_GrossLock(dev);
++
++ ret = yaffs_ReadDataFromFile(obj, pg_buf,
++ pg->index << PAGE_CACHE_SHIFT,
++ PAGE_CACHE_SIZE);
++
++ yaffs_GrossUnlock(dev);
++
++ if (ret >= 0)
++ ret = 0;
++
++ if (ret) {
++ ClearPageUptodate(pg);
++ SetPageError(pg);
++ } else {
++ SetPageUptodate(pg);
++ ClearPageError(pg);
++ }
++
++ flush_dcache_page(pg);
++ kunmap(pg);
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage_nolock done\n")));
++ return ret;
++}
++
++static int yaffs_readpage_unlock(struct file *f, struct page *pg)
++{
++ int ret = yaffs_readpage_nolock(f, pg);
++ UnlockPage(pg);
++ return ret;
++}
++
++static int yaffs_readpage(struct file *f, struct page *pg)
++{
++ int ret;
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage\n")));
++ ret=yaffs_readpage_unlock(f, pg);
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage done\n")));
++ return ret;
++}
++
++/* writepage inspired by/stolen from smbfs */
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
++#else
++static int yaffs_writepage(struct page *page)
++#endif
++{
++ yaffs_Device *dev;
++ struct address_space *mapping = page->mapping;
++ struct inode *inode;
++ unsigned long end_index;
++ char *buffer;
++ yaffs_Object *obj;
++ int nWritten = 0;
++ unsigned nBytes;
++ loff_t i_size;
++
++ if (!mapping)
++ BUG();
++ inode = mapping->host;
++ if (!inode)
++ BUG();
++ i_size = i_size_read(inode);
++
++ end_index = i_size >> PAGE_CACHE_SHIFT;
++
++ if(page->index < end_index)
++ nBytes = PAGE_CACHE_SIZE;
++ else {
++ nBytes = i_size & (PAGE_CACHE_SIZE -1);
++
++ if (page->index > end_index || !nBytes) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_writepage at %08x, inode size = %08x!!!\n"),
++ (unsigned)(page->index << PAGE_CACHE_SHIFT),
++ (unsigned)inode->i_size));
++ T(YAFFS_TRACE_OS,
++ (TSTR(" -> don't care!!\n")));
++
++ zero_user_segment(page,0,PAGE_CACHE_SIZE);
++ set_page_writeback(page);
++ unlock_page(page);
++ end_page_writeback(page);
++ return 0;
++ }
++ }
++
++ if(nBytes != PAGE_CACHE_SIZE)
++ zero_user_segment(page,nBytes,PAGE_CACHE_SIZE);
++
++ get_page(page);
++
++ buffer = kmap(page);
++
++ obj = yaffs_InodeToObject(inode);
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_writepage at %08x, size %08x\n"),
++ (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
++ T(YAFFS_TRACE_OS,
++ (TSTR("writepag0: obj = %05x, ino = %05x\n"),
++ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
++
++ nWritten = yaffs_WriteDataToFile(obj, buffer,
++ page->index << PAGE_CACHE_SHIFT, nBytes, 0);
++
++ yaffs_MarkSuperBlockDirty(dev);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("writepag1: obj = %05x, ino = %05x\n"),
++ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
++
++ yaffs_GrossUnlock(dev);
++
++ kunmap(page);
++ set_page_writeback(page);
++ unlock_page(page);
++ end_page_writeback(page);
++ put_page(page);
++
++ return (nWritten == nBytes) ? 0 : -ENOSPC;
++}
++
++
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned flags,
++ struct page **pagep, void **fsdata)
++{
++ struct page *pg = NULL;
++ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
++
++ int ret = 0;
++ int space_held = 0;
++
++ /* Get a page */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
++ pg = grab_cache_page_write_begin(mapping, index, flags);
++#else
++ pg = __grab_cache_page(mapping, index);
++#endif
++
++ *pagep = pg;
++ if (!pg) {
++ ret = -ENOMEM;
++ goto out;
++ }
++ T(YAFFS_TRACE_OS,
++ (TSTR("start yaffs_write_begin index %d(%x) uptodate %d\n"),
++ (int)index,(int)index,Page_Uptodate(pg) ? 1 : 0));
++
++ /* Get fs space */
++ space_held = yaffs_hold_space(filp);
++
++ if (!space_held) {
++ ret = -ENOSPC;
++ goto out;
++ }
++
++ /* Update page if required */
++
++ if (!Page_Uptodate(pg))
++ ret = yaffs_readpage_nolock(filp, pg);
++
++ if (ret)
++ goto out;
++
++ /* Happy path return */
++ T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n")));
++
++ return 0;
++
++out:
++ T(YAFFS_TRACE_OS,
++ (TSTR("end yaffs_write_begin fail returning %d\n"), ret));
++ if (space_held)
++ yaffs_release_space(filp);
++ if (pg) {
++ unlock_page(pg);
++ page_cache_release(pg);
++ }
++ return ret;
++}
++
++#else
++
++static int yaffs_prepare_write(struct file *f, struct page *pg,
++ unsigned offset, unsigned to)
++{
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_prepair_write\n")));
++
++ if (!Page_Uptodate(pg))
++ return yaffs_readpage_nolock(f, pg);
++ return 0;
++}
++#endif
++
++#if (YAFFS_USE_WRITE_BEGIN_END > 0)
++static int yaffs_write_end(struct file *filp, struct address_space *mapping,
++ loff_t pos, unsigned len, unsigned copied,
++ struct page *pg, void *fsdadata)
++{
++ int ret = 0;
++ void *addr, *kva;
++ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
++
++ kva = kmap(pg);
++ addr = kva + offset_into_page;
++
++ T(YAFFS_TRACE_OS,
++ ("yaffs_write_end addr %p pos %x nBytes %d\n",
++ addr,(unsigned)pos, copied));
++
++ ret = yaffs_file_write(filp, addr, copied, &pos);
++
++ if (ret != copied) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_write_end not same size ret %d copied %d\n"),
++ ret, copied));
++ SetPageError(pg);
++ } else {
++ /* Nothing */
++ }
++
++ kunmap(pg);
++
++ yaffs_release_space(filp);
++ unlock_page(pg);
++ page_cache_release(pg);
++ return ret;
++}
++#else
++
++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
++ unsigned to)
++{
++ void *addr, *kva;
++
++ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
++ int nBytes = to - offset;
++ int nWritten;
++
++ unsigned spos = pos;
++ unsigned saddr;
++
++ kva = kmap(pg);
++ addr = kva + offset;
++
++ saddr = (unsigned) addr;
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_commit_write addr %x pos %x nBytes %d\n"),
++ saddr, spos, nBytes));
++
++ nWritten = yaffs_file_write(f, addr, nBytes, &pos);
++
++ if (nWritten != nBytes) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_commit_write not same size nWritten %d nBytes %d\n"),
++ nWritten, nBytes));
++ SetPageError(pg);
++ } else {
++ /* Nothing */
++ }
++
++ kunmap(pg);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_commit_write returning %d\n"),
++ nWritten == nBytes ? 0 : nWritten));
++
++ return nWritten == nBytes ? 0 : nWritten;
++}
++#endif
++
++
++static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
++{
++ if (inode && obj) {
++
++
++ /* Check mode against the variant type and attempt to repair if broken. */
++ __u32 mode = obj->yst_mode;
++ switch (obj->variantType) {
++ case YAFFS_OBJECT_TYPE_FILE:
++ if (!S_ISREG(mode)) {
++ obj->yst_mode &= ~S_IFMT;
++ obj->yst_mode |= S_IFREG;
++ }
++
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ if (!S_ISLNK(mode)) {
++ obj->yst_mode &= ~S_IFMT;
++ obj->yst_mode |= S_IFLNK;
++ }
++
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ if (!S_ISDIR(mode)) {
++ obj->yst_mode &= ~S_IFMT;
++ obj->yst_mode |= S_IFDIR;
++ }
++
++ break;
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ default:
++ /* TODO? */
++ break;
++ }
++
++ inode->i_flags |= S_NOATIME;
++
++ inode->i_ino = obj->objectId;
++ inode->i_mode = obj->yst_mode;
++ inode->i_uid = obj->yst_uid;
++ inode->i_gid = obj->yst_gid;
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
++ inode->i_blksize = inode->i_sb->s_blocksize;
++#endif
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++
++ inode->i_rdev = old_decode_dev(obj->yst_rdev);
++ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
++ inode->i_atime.tv_nsec = 0;
++ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
++ inode->i_mtime.tv_nsec = 0;
++ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
++ inode->i_ctime.tv_nsec = 0;
++#else
++ inode->i_rdev = obj->yst_rdev;
++ inode->i_atime = obj->yst_atime;
++ inode->i_mtime = obj->yst_mtime;
++ inode->i_ctime = obj->yst_ctime;
++#endif
++ inode->i_size = yaffs_GetObjectFileLength(obj);
++ inode->i_blocks = (inode->i_size + 511) >> 9;
++
++ inode->i_nlink = yaffs_GetObjectLinkCount(obj);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n"),
++ inode->i_mode, inode->i_uid, inode->i_gid,
++ (int)inode->i_size, atomic_read(&inode->i_count)));
++
++ switch (obj->yst_mode & S_IFMT) {
++ default: /* fifo, device or socket */
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ init_special_inode(inode, obj->yst_mode,
++ old_decode_dev(obj->yst_rdev));
++#else
++ init_special_inode(inode, obj->yst_mode,
++ (dev_t) (obj->yst_rdev));
++#endif
++ break;
++ case S_IFREG: /* file */
++ inode->i_op = &yaffs_file_inode_operations;
++ inode->i_fop = &yaffs_file_operations;
++ inode->i_mapping->a_ops =
++ &yaffs_file_address_operations;
++ break;
++ case S_IFDIR: /* directory */
++ inode->i_op = &yaffs_dir_inode_operations;
++ inode->i_fop = &yaffs_dir_operations;
++ break;
++ case S_IFLNK: /* symlink */
++ inode->i_op = &yaffs_symlink_inode_operations;
++ break;
++ }
++
++ yaffs_InodeToObjectLV(inode) = obj;
++
++ obj->myInode = inode;
++
++ } else {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_FileInode invalid parameters\n")));
++ }
++
++}
++
++struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
++ yaffs_Object *obj)
++{
++ struct inode *inode;
++
++ if (!sb) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_get_inode for NULL super_block!!\n")));
++ return NULL;
++
++ }
++
++ if (!obj) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_get_inode for NULL object!!\n")));
++ return NULL;
++
++ }
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_get_inode for object %d\n"), obj->objectId));
++
++ inode = Y_IGET(sb, obj->objectId);
++ if (IS_ERR(inode))
++ return NULL;
++
++ /* NB Side effect: iget calls back to yaffs_read_inode(). */
++ /* iget also increments the inode's i_count */
++ /* NB You can't be holding grossLock or deadlock will happen! */
++
++ return inode;
++}
++
++static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
++ loff_t *pos)
++{
++ yaffs_Object *obj;
++ int nWritten, ipos;
++ struct inode *inode;
++ yaffs_Device *dev;
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ inode = f->f_dentry->d_inode;
++
++ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
++ ipos = inode->i_size;
++ else
++ ipos = *pos;
++
++ if (!obj)
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_file_write: hey obj is null!\n")));
++ else
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_file_write about to write writing %u(%x) bytes"
++ "to object %d at %d(%x)\n"),
++ (unsigned) n, (unsigned) n, obj->objectId, ipos,ipos));
++
++ nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
++
++ yaffs_MarkSuperBlockDirty(dev);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_file_write: %d(%x) bytes written\n"),
++ (unsigned )n,(unsigned)n));
++
++ if (nWritten > 0) {
++ ipos += nWritten;
++ *pos = ipos;
++ if (ipos > inode->i_size) {
++ inode->i_size = ipos;
++ inode->i_blocks = (ipos + 511) >> 9;
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_file_write size updated to %d bytes, "
++ "%d blocks\n"),
++ ipos, (int)(inode->i_blocks)));
++ }
++
++ }
++ yaffs_GrossUnlock(dev);
++ return (nWritten == 0) && (n > 0) ? -ENOSPC : nWritten;
++}
++
++/* Space holding and freeing is done to ensure we have space available for write_begin/end */
++/* For now we just assume few parallel writes and check against a small number. */
++/* Todo: need to do this with a counter to handle parallel reads better */
++
++static ssize_t yaffs_hold_space(struct file *f)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++
++ int nFreeChunks;
++
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
++
++ yaffs_GrossUnlock(dev);
++
++ return (nFreeChunks > 20) ? 1 : 0;
++}
++
++static void yaffs_release_space(struct file *f)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++
++ yaffs_GrossUnlock(dev);
++}
++
++
++static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin)
++{
++ long long retval;
++
++ lock_kernel();
++
++ switch (origin){
++ case 2:
++ offset += i_size_read(file->f_path.dentry->d_inode);
++ break;
++ case 1:
++ offset += file->f_pos;
++ }
++ retval = -EINVAL;
++
++ if (offset >= 0){
++ if (offset != file->f_pos)
++ file->f_pos = offset;
++
++ retval = offset;
++ }
++ unlock_kernel();
++ return retval;
++}
++
++
++static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++ struct yaffs_SearchContext *sc;
++ struct inode *inode = f->f_dentry->d_inode;
++ unsigned long offset, curoffs;
++ yaffs_Object *l;
++ int retVal = 0;
++
++ char name[YAFFS_MAX_NAME_LENGTH + 1];
++
++ obj = yaffs_DentryToObject(f->f_dentry);
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ yaffs_DeviceToLC(dev)->readdirProcess = current;
++
++ offset = f->f_pos;
++
++ sc = yaffs_NewSearch(obj);
++ if(!sc){
++ retVal = -ENOMEM;
++ goto out;
++ }
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_readdir: starting at %d\n"), (int)offset));
++
++ if (offset == 0) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_readdir: entry . ino %d \n"),
++ (int)inode->i_ino));
++ yaffs_GrossUnlock(dev);
++ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0){
++ yaffs_GrossLock(dev);
++ goto out;
++ }
++ yaffs_GrossLock(dev);
++ offset++;
++ f->f_pos++;
++ }
++ if (offset == 1) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_readdir: entry .. ino %d \n"),
++ (int)f->f_dentry->d_parent->d_inode->i_ino));
++ yaffs_GrossUnlock(dev);
++ if (filldir(dirent, "..", 2, offset,
++ f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0){
++ yaffs_GrossLock(dev);
++ goto out;
++ }
++ yaffs_GrossLock(dev);
++ offset++;
++ f->f_pos++;
++ }
++
++ curoffs = 1;
++
++ /* If the directory has changed since the open or last call to
++ readdir, rewind to after the 2 canned entries. */
++ if (f->f_version != inode->i_version) {
++ offset = 2;
++ f->f_pos = offset;
++ f->f_version = inode->i_version;
++ }
++
++ while(sc->nextReturn){
++ curoffs++;
++ l = sc->nextReturn;
++ if (curoffs >= offset) {
++ int this_inode = yaffs_GetObjectInode(l);
++ int this_type = yaffs_GetObjectType(l);
++
++ yaffs_GetObjectName(l, name,
++ YAFFS_MAX_NAME_LENGTH + 1);
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_readdir: %s inode %d\n"),
++ name, yaffs_GetObjectInode(l)));
++
++ yaffs_GrossUnlock(dev);
++
++ if (filldir(dirent,
++ name,
++ strlen(name),
++ offset,
++ this_inode,
++ this_type) < 0){
++ yaffs_GrossLock(dev);
++ goto out;
++ }
++
++ yaffs_GrossLock(dev);
++
++ offset++;
++ f->f_pos++;
++ }
++ yaffs_SearchAdvance(sc);
++ }
++
++out:
++ yaffs_EndSearch(sc);
++ yaffs_DeviceToLC(dev)->readdirProcess = NULL;
++ yaffs_GrossUnlock(dev);
++
++ return retVal;
++}
++
++
++
++/*
++ * File creation. Allocate an inode, and we're done..
++ */
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
++#define YCRED(x) x
++#else
++#define YCRED(x) (x->cred)
++#endif
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++ dev_t rdev)
++#else
++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
++ int rdev)
++#endif
++{
++ struct inode *inode;
++
++ yaffs_Object *obj = NULL;
++ yaffs_Device *dev;
++
++ yaffs_Object *parent = yaffs_InodeToObject(dir);
++
++ int error = -ENOSPC;
++ uid_t uid = YCRED(current)->fsuid;
++ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
++
++ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
++ mode |= S_ISGID;
++
++ if (parent) {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_mknod: parent object %d type %d\n"),
++ parent->objectId, parent->variantType));
++ } else {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_mknod: could not get parent object\n")));
++ return -EPERM;
++ }
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making oject for %s, "
++ "mode %x dev %x\n"),
++ dentry->d_name.name, mode, rdev));
++
++ dev = parent->myDev;
++
++ yaffs_GrossLock(dev);
++
++ switch (mode & S_IFMT) {
++ default:
++ /* Special (socket, fifo, device...) */
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making special\n")));
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
++ gid, old_encode_dev(rdev));
++#else
++ obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
++ gid, rdev);
++#endif
++ break;
++ case S_IFREG: /* file */
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making file\n")));
++ obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid,
++ gid);
++ break;
++ case S_IFDIR: /* directory */
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_mknod: making directory\n")));
++ obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode,
++ uid, gid);
++ break;
++ case S_IFLNK: /* symlink */
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making symlink\n")));
++ obj = NULL; /* Do we ever get here? */
++ break;
++ }
++
++ /* Can not call yaffs_get_inode() with gross lock held */
++ yaffs_GrossUnlock(dev);
++
++ if (obj) {
++ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
++ d_instantiate(dentry, inode);
++ update_dir_time(dir);
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_mknod created object %d count = %d\n"),
++ obj->objectId, atomic_read(&inode->i_count)));
++ error = 0;
++ yaffs_FillInodeFromObject(dir,parent);
++ } else {
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_mknod failed making object\n")));
++ error = -ENOMEM;
++ }
++
++ return error;
++}
++
++static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
++{
++ int retVal;
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mkdir\n")));
++ retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
++ return retVal;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
++ struct nameidata *n)
++#else
++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
++#endif
++{
++ T(YAFFS_TRACE_OS,(TSTR("yaffs_create\n")));
++ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
++}
++
++static int yaffs_unlink(struct inode *dir, struct dentry *dentry)
++{
++ int retVal;
++
++ yaffs_Device *dev;
++ yaffs_Object *obj;
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_unlink %d:%s\n"),
++ (int)(dir->i_ino),
++ dentry->d_name.name));
++ obj = yaffs_InodeToObject(dir);
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ retVal = yaffs_Unlink(obj, dentry->d_name.name);
++
++ if (retVal == YAFFS_OK) {
++ dentry->d_inode->i_nlink--;
++ dir->i_version++;
++ yaffs_GrossUnlock(dev);
++ mark_inode_dirty(dentry->d_inode);
++ update_dir_time(dir);
++ return 0;
++ }
++ yaffs_GrossUnlock(dev);
++ return -ENOTEMPTY;
++}
++
++/*
++ * Create a link...
++ */
++static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
++ struct dentry *dentry)
++{
++ struct inode *inode = old_dentry->d_inode;
++ yaffs_Object *obj = NULL;
++ yaffs_Object *link = NULL;
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n")));
++
++ obj = yaffs_InodeToObject(inode);
++ dev = obj->myDev;
++
++ yaffs_GrossLock(dev);
++
++ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
++ link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name,
++ obj);
++
++ if (link) {
++ old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
++ d_instantiate(dentry, old_dentry->d_inode);
++ atomic_inc(&old_dentry->d_inode->i_count);
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_link link count %d i_count %d\n"),
++ old_dentry->d_inode->i_nlink,
++ atomic_read(&old_dentry->d_inode->i_count)));
++ }
++
++ yaffs_GrossUnlock(dev);
++
++ if (link){
++ update_dir_time(dir);
++ return 0;
++ }
++
++ return -EPERM;
++}
++
++static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
++ const char *symname)
++{
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++ uid_t uid = YCRED(current)->fsuid;
++ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_symlink\n")));
++
++ dev = yaffs_InodeToObject(dir)->myDev;
++ yaffs_GrossLock(dev);
++ obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
++ S_IFLNK | S_IRWXUGO, uid, gid, symname);
++ yaffs_GrossUnlock(dev);
++
++ if (obj) {
++ struct inode *inode;
++
++ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
++ d_instantiate(dentry, inode);
++ update_dir_time(dir);
++ T(YAFFS_TRACE_OS, (TSTR("symlink created OK\n")));
++ return 0;
++ } else {
++ T(YAFFS_TRACE_OS, (TSTR("symlink not created\n")));
++ }
++
++ return -ENOMEM;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
++static int yaffs_sync_object(struct file *file, int datasync)
++#else
++static int yaffs_sync_object(struct file *file, struct dentry *dentry,
++ int datasync)
++#endif
++{
++
++ yaffs_Object *obj;
++ yaffs_Device *dev;
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
++ struct dentry *dentry = file->f_path.dentry;
++#endif
++
++ obj = yaffs_DentryToObject(dentry);
++
++ dev = obj->myDev;
++
++ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
++ (TSTR("yaffs_sync_object\n")));
++ yaffs_GrossLock(dev);
++ yaffs_FlushFile(obj, 1, datasync);
++ yaffs_GrossUnlock(dev);
++ return 0;
++}
++
++/*
++ * The VFS layer already does all the dentry stuff for rename.
++ *
++ * NB: POSIX says you can rename an object over an old object of the same name
++ */
++static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
++ struct inode *new_dir, struct dentry *new_dentry)
++{
++ yaffs_Device *dev;
++ int retVal = YAFFS_FAIL;
++ yaffs_Object *target;
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n")));
++ dev = yaffs_InodeToObject(old_dir)->myDev;
++
++ yaffs_GrossLock(dev);
++
++ /* Check if the target is an existing directory that is not empty. */
++ target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),
++ new_dentry->d_name.name);
++
++
++
++ if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
++ !ylist_empty(&target->variant.directoryVariant.children)) {
++
++ T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n")));
++
++ retVal = YAFFS_FAIL;
++ } else {
++ /* Now does unlinking internally using shadowing mechanism */
++ T(YAFFS_TRACE_OS, (TSTR("calling yaffs_RenameObject\n")));
++
++ retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),
++ old_dentry->d_name.name,
++ yaffs_InodeToObject(new_dir),
++ new_dentry->d_name.name);
++ }
++ yaffs_GrossUnlock(dev);
++
++ if (retVal == YAFFS_OK) {
++ if (target) {
++ new_dentry->d_inode->i_nlink--;
++ mark_inode_dirty(new_dentry->d_inode);
++ }
++
++ update_dir_time(old_dir);
++ if(old_dir != new_dir)
++ update_dir_time(new_dir);
++ return 0;
++ } else {
++ return -ENOTEMPTY;
++ }
++}
++
++static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
++{
++ struct inode *inode = dentry->d_inode;
++ int error = 0;
++ yaffs_Device *dev;
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_setattr of object %d\n"),
++ yaffs_InodeToObject(inode)->objectId));
++
++ /* Fail if a requested resize >= 2GB */
++ if (attr->ia_valid & ATTR_SIZE &&
++ (attr->ia_size >> 31))
++ error = -EINVAL;
++
++ if (error == 0)
++ error = inode_change_ok(inode, attr);
++ if (error == 0) {
++ int result;
++ if (!error){
++ error = yaffs_vfs_setattr(inode, attr);
++ T(YAFFS_TRACE_OS,(TSTR("inode_setattr called\n")));
++ if (attr->ia_valid & ATTR_SIZE){
++ yaffs_vfs_setsize(inode,attr->ia_size);
++ inode->i_blocks = (inode->i_size + 511) >> 9;
++ }
++ }
++ dev = yaffs_InodeToObject(inode)->myDev;
++ if (attr->ia_valid & ATTR_SIZE){
++ T(YAFFS_TRACE_OS,(TSTR("resize to %d(%x)\n"),
++ (int)(attr->ia_size),(int)(attr->ia_size)));
++ }
++ yaffs_GrossLock(dev);
++ result = yaffs_SetAttributes(yaffs_InodeToObject(inode), attr);
++ if(result == YAFFS_OK) {
++ error = 0;
++ } else {
++ error = -EPERM;
++ }
++ yaffs_GrossUnlock(dev);
++
++ }
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_setattr done returning %d\n"),error));
++
++ return error;
++}
++
++#ifdef CONFIG_YAFFS_XATTR
++int yaffs_setxattr(struct dentry *dentry, const char *name,
++ const void *value, size_t size, int flags)
++{
++ struct inode *inode = dentry->d_inode;
++ int error = 0;
++ yaffs_Device *dev;
++ yaffs_Object *obj = yaffs_InodeToObject(inode);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_setxattr of object %d\n"),
++ obj->objectId));
++
++
++ if (error == 0) {
++ int result;
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ result = yaffs_SetXAttribute(obj, name, value, size, flags);
++ if(result == YAFFS_OK)
++ error = 0;
++ else if(result < 0)
++ error = result;
++ yaffs_GrossUnlock(dev);
++
++ }
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_setxattr done returning %d\n"),error));
++
++ return error;
++}
++
++
++ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
++ size_t size)
++{
++ struct inode *inode = dentry->d_inode;
++ int error = 0;
++ yaffs_Device *dev;
++ yaffs_Object *obj = yaffs_InodeToObject(inode);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_getxattr \"%s\" from object %d\n"),
++ name, obj->objectId));
++
++ if (error == 0) {
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ error = yaffs_GetXAttribute(obj, name, buff, size);
++ yaffs_GrossUnlock(dev);
++
++ }
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_getxattr done returning %d\n"),error));
++
++ return error;
++}
++
++int yaffs_removexattr(struct dentry *dentry, const char *name)
++{
++ struct inode *inode = dentry->d_inode;
++ int error = 0;
++ yaffs_Device *dev;
++ yaffs_Object *obj = yaffs_InodeToObject(inode);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_removexattr of object %d\n"),
++ obj->objectId));
++
++
++ if (error == 0) {
++ int result;
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ result = yaffs_RemoveXAttribute(obj, name);
++ if(result == YAFFS_OK)
++ error = 0;
++ else if(result < 0)
++ error = result;
++ yaffs_GrossUnlock(dev);
++
++ }
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_removexattr done returning %d\n"),error));
++
++ return error;
++}
++
++ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size)
++{
++ struct inode *inode = dentry->d_inode;
++ int error = 0;
++ yaffs_Device *dev;
++ yaffs_Object *obj = yaffs_InodeToObject(inode);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_listxattr of object %d\n"),
++ obj->objectId));
++
++
++ if (error == 0) {
++ dev = obj->myDev;
++ yaffs_GrossLock(dev);
++ error = yaffs_ListXAttributes(obj, buff, size);
++ yaffs_GrossUnlock(dev);
++
++ }
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_listxattr done returning %d\n"),error));
++
++ return error;
++}
++
++#endif
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
++{
++ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
++ struct super_block *sb = dentry->d_sb;
++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++#else
++static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++#endif
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n")));
++
++ yaffs_GrossLock(dev);
++
++ buf->f_type = YAFFS_MAGIC;
++ buf->f_bsize = sb->s_blocksize;
++ buf->f_namelen = 255;
++
++ if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
++ /* Do this if chunk size is not a power of 2 */
++
++ uint64_t bytesInDev;
++ uint64_t bytesFree;
++
++ bytesInDev = ((uint64_t)((dev->param.endBlock - dev->param.startBlock + 1))) *
++ ((uint64_t)(dev->param.nChunksPerBlock * dev->nDataBytesPerChunk));
++
++ do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
++ buf->f_blocks = bytesInDev;
++
++ bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
++ ((uint64_t)(dev->nDataBytesPerChunk));
++
++ do_div(bytesFree, sb->s_blocksize);
++
++ buf->f_bfree = bytesFree;
++
++ } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
++
++ buf->f_blocks =
++ (dev->param.endBlock - dev->param.startBlock + 1) *
++ dev->param.nChunksPerBlock /
++ (sb->s_blocksize / dev->nDataBytesPerChunk);
++ buf->f_bfree =
++ yaffs_GetNumberOfFreeChunks(dev) /
++ (sb->s_blocksize / dev->nDataBytesPerChunk);
++ } else {
++ buf->f_blocks =
++ (dev->param.endBlock - dev->param.startBlock + 1) *
++ dev->param.nChunksPerBlock *
++ (dev->nDataBytesPerChunk / sb->s_blocksize);
++
++ buf->f_bfree =
++ yaffs_GetNumberOfFreeChunks(dev) *
++ (dev->nDataBytesPerChunk / sb->s_blocksize);
++ }
++
++ buf->f_files = 0;
++ buf->f_ffree = 0;
++ buf->f_bavail = buf->f_bfree;
++
++ yaffs_GrossUnlock(dev);
++ return 0;
++}
++
++
++
++static void yaffs_FlushInodes(struct super_block *sb)
++{
++ struct inode *iptr;
++ yaffs_Object *obj;
++
++ list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){
++ obj = yaffs_InodeToObject(iptr);
++ if(obj){
++ T(YAFFS_TRACE_OS, (TSTR("flushing obj %d\n"),
++ obj->objectId));
++ yaffs_FlushFile(obj,1,0);
++ }
++ }
++}
++
++
++static void yaffs_FlushSuperBlock(struct super_block *sb, int do_checkpoint)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++ if(!dev)
++ return;
++
++ yaffs_FlushInodes(sb);
++ yaffs_UpdateDirtyDirectories(dev);
++ yaffs_FlushEntireDeviceCache(dev);
++ if(do_checkpoint)
++ yaffs_CheckpointSave(dev);
++}
++
++
++static unsigned yaffs_bg_gc_urgency(yaffs_Device *dev)
++{
++ unsigned erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
++ struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
++ unsigned scatteredFree = 0; /* Free chunks not in an erased block */
++
++ if(erasedChunks < dev->nFreeChunks)
++ scatteredFree = (dev->nFreeChunks - erasedChunks);
++
++ if(!context->bgRunning)
++ return 0;
++ else if(scatteredFree < (dev->param.nChunksPerBlock * 2))
++ return 0;
++ else if(erasedChunks > dev->nFreeChunks/2)
++ return 0;
++ else if(erasedChunks > dev->nFreeChunks/4)
++ return 1;
++ else
++ return 2;
++}
++
++static int yaffs_do_sync_fs(struct super_block *sb,
++ int request_checkpoint)
++{
++
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
++ unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
++ int do_checkpoint;
++
++ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
++ (TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"),
++ gc_urgent,
++ sb->s_dirt ? "dirty" : "clean",
++ request_checkpoint ? "checkpoint requested" : "no checkpoint",
++ oneshot_checkpoint ? " one-shot" : "" ));
++
++ yaffs_GrossLock(dev);
++ do_checkpoint = ((request_checkpoint && !gc_urgent) ||
++ oneshot_checkpoint) &&
++ !dev->isCheckpointed;
++
++ if (sb->s_dirt || do_checkpoint) {
++ yaffs_FlushSuperBlock(sb, !dev->isCheckpointed && do_checkpoint);
++ sb->s_dirt = 0;
++ if(oneshot_checkpoint)
++ yaffs_auto_checkpoint &= ~4;
++ }
++ yaffs_GrossUnlock(dev);
++
++ return 0;
++}
++
++/*
++ * yaffs background thread functions .
++ * yaffs_BackgroundThread() the thread function
++ * yaffs_BackgroundStart() launches the background thread.
++ * yaffs_BackgroundStop() cleans up the background thread.
++ *
++ * NB:
++ * The thread should only run after the yaffs is initialised
++ * The thread should be stopped before yaffs is unmounted.
++ * The thread should not do any writing while the fs is in read only.
++ */
++
++#ifdef YAFFS_COMPILE_BACKGROUND
++
++void yaffs_background_waker(unsigned long data)
++{
++ wake_up_process((struct task_struct *)data);
++}
++
++static int yaffs_BackgroundThread(void *data)
++{
++ yaffs_Device *dev = (yaffs_Device *)data;
++ struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
++ unsigned long now = jiffies;
++ unsigned long next_dir_update = now;
++ unsigned long next_gc = now;
++ unsigned long expires;
++ unsigned int urgency;
++
++ int gcResult;
++ struct timer_list timer;
++
++ T(YAFFS_TRACE_BACKGROUND,
++ (TSTR("yaffs_background starting for dev %p\n"),
++ (void *)dev));
++
++#ifdef YAFFS_COMPILE_FREEZER
++ set_freezable();
++#endif
++ while(context->bgRunning){
++ T(YAFFS_TRACE_BACKGROUND,
++ (TSTR("yaffs_background\n")));
++
++ if(kthread_should_stop())
++ break;
++
++#ifdef YAFFS_COMPILE_FREEZER
++ if(try_to_freeze())
++ continue;
++#endif
++ yaffs_GrossLock(dev);
++
++ now = jiffies;
++
++ if(time_after(now, next_dir_update) && yaffs_bg_enable){
++ yaffs_UpdateDirtyDirectories(dev);
++ next_dir_update = now + HZ;
++ }
++
++ if(time_after(now,next_gc) && yaffs_bg_enable){
++ if(!dev->isCheckpointed){
++ urgency = yaffs_bg_gc_urgency(dev);
++ gcResult = yaffs_BackgroundGarbageCollect(dev, urgency);
++ if(urgency > 1)
++ next_gc = now + HZ/20+1;
++ else if(urgency > 0)
++ next_gc = now + HZ/10+1;
++ else
++ next_gc = now + HZ * 2;
++ } else /*
++ * gc not running so set to next_dir_update
++ * to cut down on wake ups
++ */
++ next_gc = next_dir_update;
++ }
++ yaffs_GrossUnlock(dev);
++#if 1
++ expires = next_dir_update;
++ if (time_before(next_gc,expires))
++ expires = next_gc;
++ if(time_before(expires,now))
++ expires = now + HZ;
++
++ Y_INIT_TIMER(&timer);
++ timer.expires = expires+1;
++ timer.data = (unsigned long) current;
++ timer.function = yaffs_background_waker;
++
++ set_current_state(TASK_INTERRUPTIBLE);
++ add_timer(&timer);
++ schedule();
++ del_timer_sync(&timer);
++#else
++ msleep(10);
++#endif
++ }
++
++ return 0;
++}
++
++static int yaffs_BackgroundStart(yaffs_Device *dev)
++{
++ int retval = 0;
++ struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
++
++ if(dev->readOnly)
++ return -1;
++
++ context->bgRunning = 1;
++
++ context->bgThread = kthread_run(yaffs_BackgroundThread,
++ (void *)dev,"yaffs-bg-%d",context->mount_id);
++
++ if(IS_ERR(context->bgThread)){
++ retval = PTR_ERR(context->bgThread);
++ context->bgThread = NULL;
++ context->bgRunning = 0;
++ }
++ return retval;
++}
++
++static void yaffs_BackgroundStop(yaffs_Device *dev)
++{
++ struct yaffs_LinuxContext *ctxt = yaffs_DeviceToLC(dev);
++
++ ctxt->bgRunning = 0;
++
++ if( ctxt->bgThread){
++ kthread_stop(ctxt->bgThread);
++ ctxt->bgThread = NULL;
++ }
++}
++#else
++static int yaffs_BackgroundThread(void *data)
++{
++ return 0;
++}
++
++static int yaffs_BackgroundStart(yaffs_Device *dev)
++{
++ return 0;
++}
++
++static void yaffs_BackgroundStop(yaffs_Device *dev)
++{
++}
++#endif
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static void yaffs_write_super(struct super_block *sb)
++#else
++static int yaffs_write_super(struct super_block *sb)
++#endif
++{
++ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
++
++ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
++ (TSTR("yaffs_write_super%s\n"),
++ request_checkpoint ? " checkpt" : ""));
++
++ yaffs_do_sync_fs(sb, request_checkpoint);
++
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
++ return 0;
++#endif
++}
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_sync_fs(struct super_block *sb, int wait)
++#else
++static int yaffs_sync_fs(struct super_block *sb)
++#endif
++{
++ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
++
++ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
++ (TSTR("yaffs_sync_fs%s\n"),
++ request_checkpoint ? " checkpt" : ""));
++
++ yaffs_do_sync_fs(sb, request_checkpoint);
++
++ return 0;
++}
++
++#ifdef YAFFS_USE_OWN_IGET
++
++static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
++{
++ struct inode *inode;
++ yaffs_Object *obj;
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_iget for %lu\n"), ino));
++
++ inode = iget_locked(sb, ino);
++ if (!inode)
++ return ERR_PTR(-ENOMEM);
++ if (!(inode->i_state & I_NEW))
++ return inode;
++
++ /* NB This is called as a side effect of other functions, but
++ * we had to release the lock to prevent deadlocks, so
++ * need to lock again.
++ */
++
++ yaffs_GrossLock(dev);
++
++ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
++
++ yaffs_FillInodeFromObject(inode, obj);
++
++ yaffs_GrossUnlock(dev);
++
++ unlock_new_inode(inode);
++ return inode;
++}
++
++#else
++
++static void yaffs_read_inode(struct inode *inode)
++{
++ /* NB This is called as a side effect of other functions, but
++ * we had to release the lock to prevent deadlocks, so
++ * need to lock again.
++ */
++
++ yaffs_Object *obj;
++ yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_read_inode for %d\n"), (int)inode->i_ino));
++
++ if(current != yaffs_DeviceToLC(dev)->readdirProcess)
++ yaffs_GrossLock(dev);
++
++ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
++
++ yaffs_FillInodeFromObject(inode, obj);
++
++ if(current != yaffs_DeviceToLC(dev)->readdirProcess)
++ yaffs_GrossUnlock(dev);
++}
++
++#endif
++
++static YLIST_HEAD(yaffs_context_list);
++struct semaphore yaffs_context_lock;
++
++static void yaffs_put_super(struct super_block *sb)
++{
++ yaffs_Device *dev = yaffs_SuperToDevice(sb);
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n")));
++
++ T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
++ (TSTR("Shutting down yaffs background thread\n")));
++ yaffs_BackgroundStop(dev);
++ T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
++ (TSTR("yaffs background thread shut down\n")));
++
++ yaffs_GrossLock(dev);
++
++ yaffs_FlushSuperBlock(sb,1);
++
++ if (yaffs_DeviceToLC(dev)->putSuperFunc)
++ yaffs_DeviceToLC(dev)->putSuperFunc(sb);
++
++
++ yaffs_Deinitialise(dev);
++
++ yaffs_GrossUnlock(dev);
++
++ down(&yaffs_context_lock);
++ ylist_del_init(&(yaffs_DeviceToLC(dev)->contextList));
++ up(&yaffs_context_lock);
++
++ if (yaffs_DeviceToLC(dev)->spareBuffer) {
++ YFREE(yaffs_DeviceToLC(dev)->spareBuffer);
++ yaffs_DeviceToLC(dev)->spareBuffer = NULL;
++ }
++
++ kfree(dev);
++}
++
++
++static void yaffs_MTDPutSuper(struct super_block *sb)
++{
++ struct mtd_info *mtd = yaffs_DeviceToMtd(yaffs_SuperToDevice(sb));
++
++ if (mtd->sync)
++ mtd->sync(mtd);
++
++ put_mtd_device(mtd);
++}
++
++
++static void yaffs_MarkSuperBlockDirty(yaffs_Device *dev)
++{
++ struct super_block *sb = yaffs_DeviceToLC(dev)->superBlock;
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_MarkSuperBlockDirty() sb = %p\n"), sb));
++ if (sb)
++ sb->s_dirt = 1;
++}
++
++typedef struct {
++ int inband_tags;
++ int skip_checkpoint_read;
++ int skip_checkpoint_write;
++ int no_cache;
++ int tags_ecc_on;
++ int tags_ecc_overridden;
++ int lazy_loading_enabled;
++ int lazy_loading_overridden;
++ int empty_lost_and_found;
++ int empty_lost_and_found_overridden;
++} yaffs_options;
++
++#define MAX_OPT_LEN 30
++static int yaffs_parse_options(yaffs_options *options, const char *options_str)
++{
++ char cur_opt[MAX_OPT_LEN + 1];
++ int p;
++ int error = 0;
++
++ /* Parse through the options which is a comma seperated list */
++
++ while (options_str && *options_str && !error) {
++ memset(cur_opt, 0, MAX_OPT_LEN + 1);
++ p = 0;
++
++ while(*options_str == ',')
++ options_str++;
++
++ while (*options_str && *options_str != ',') {
++ if (p < MAX_OPT_LEN) {
++ cur_opt[p] = *options_str;
++ p++;
++ }
++ options_str++;
++ }
++
++ if (!strcmp(cur_opt, "inband-tags"))
++ options->inband_tags = 1;
++ else if (!strcmp(cur_opt, "tags-ecc-off")){
++ options->tags_ecc_on = 0;
++ options->tags_ecc_overridden=1;
++ } else if (!strcmp(cur_opt, "tags-ecc-on")){
++ options->tags_ecc_on = 1;
++ options->tags_ecc_overridden = 1;
++ } else if (!strcmp(cur_opt, "lazy-loading-off")){
++ options->lazy_loading_enabled = 0;
++ options->lazy_loading_overridden=1;
++ } else if (!strcmp(cur_opt, "lazy-loading-on")){
++ options->lazy_loading_enabled = 1;
++ options->lazy_loading_overridden = 1;
++ } else if (!strcmp(cur_opt, "empty-lost-and-found-off")){
++ options->empty_lost_and_found = 0;
++ options->empty_lost_and_found_overridden=1;
++ } else if (!strcmp(cur_opt, "empty-lost-and-found-on")){
++ options->empty_lost_and_found = 1;
++ options->empty_lost_and_found_overridden=1;
++ } else if (!strcmp(cur_opt, "no-cache"))
++ options->no_cache = 1;
++ else if (!strcmp(cur_opt, "no-checkpoint-read"))
++ options->skip_checkpoint_read = 1;
++ else if (!strcmp(cur_opt, "no-checkpoint-write"))
++ options->skip_checkpoint_write = 1;
++ else if (!strcmp(cur_opt, "no-checkpoint")) {
++ options->skip_checkpoint_read = 1;
++ options->skip_checkpoint_write = 1;
++ } else {
++ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",
++ cur_opt);
++ error = 1;
++ }
++ }
++
++ return error;
++}
++
++static struct super_block *yaffs_internal_read_super(int yaffsVersion,
++ struct super_block *sb,
++ void *data, int silent)
++{
++ int nBlocks;
++ struct inode *inode = NULL;
++ struct dentry *root;
++ yaffs_Device *dev = 0;
++ char devname_buf[BDEVNAME_SIZE + 1];
++ struct mtd_info *mtd;
++ int err;
++ char *data_str = (char *)data;
++ struct yaffs_LinuxContext *context = NULL;
++ yaffs_DeviceParam *param;
++
++ int readOnly = 0;
++
++ yaffs_options options;
++
++ unsigned mount_id;
++ int found;
++ struct yaffs_LinuxContext *context_iterator;
++ struct ylist_head *l;
++
++ sb->s_magic = YAFFS_MAGIC;
++ sb->s_op = &yaffs_super_ops;
++ sb->s_flags |= MS_NOATIME;
++
++ readOnly =((sb->s_flags & MS_RDONLY) != 0);
++
++
++#ifdef YAFFS_COMPILE_EXPORTFS
++ sb->s_export_op = &yaffs_export_ops;
++#endif
++
++ if (!sb)
++ printk(KERN_INFO "yaffs: sb is NULL\n");
++ else if (!sb->s_dev)
++ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n");
++ else if (!yaffs_devname(sb, devname_buf))
++ printk(KERN_INFO "yaffs: devname is NULL\n");
++ else
++ printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n",
++ sb->s_dev,
++ yaffs_devname(sb, devname_buf),
++ readOnly ? "ro" : "rw");
++
++ if (!data_str)
++ data_str = "";
++
++ printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str);
++
++ memset(&options, 0, sizeof(options));
++
++ if (yaffs_parse_options(&options, data_str)) {
++ /* Option parsing failed */
++ return NULL;
++ }
++
++
++ sb->s_blocksize = PAGE_CACHE_SIZE;
++ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_read_super: Using yaffs%d\n"), yaffsVersion));
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_read_super: block size %d\n"),
++ (int)(sb->s_blocksize)));
++
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: Attempting MTD mount of %u.%u,\"%s\"\n"),
++ MAJOR(sb->s_dev), MINOR(sb->s_dev),
++ yaffs_devname(sb, devname_buf)));
++
++ /* Check it's an mtd device..... */
++ if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
++ return NULL; /* This isn't an mtd device */
++
++ /* Get the device */
++ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
++ if (!mtd) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: MTD device #%u doesn't appear to exist\n"),
++ MINOR(sb->s_dev)));
++ return NULL;
++ }
++ /* Check it's NAND */
++ if (mtd->type != MTD_NANDFLASH) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: MTD device is not NAND it's type %d\n"),
++ mtd->type));
++ return NULL;
++ }
++
++ T(YAFFS_TRACE_OS, (TSTR(" erase %p\n"), mtd->erase));
++ T(YAFFS_TRACE_OS, (TSTR(" read %p\n"), mtd->read));
++ T(YAFFS_TRACE_OS, (TSTR(" write %p\n"), mtd->write));
++ T(YAFFS_TRACE_OS, (TSTR(" readoob %p\n"), mtd->read_oob));
++ T(YAFFS_TRACE_OS, (TSTR(" writeoob %p\n"), mtd->write_oob));
++ T(YAFFS_TRACE_OS, (TSTR(" block_isbad %p\n"), mtd->block_isbad));
++ T(YAFFS_TRACE_OS, (TSTR(" block_markbad %p\n"), mtd->block_markbad));
++ T(YAFFS_TRACE_OS, (TSTR(" %s %d\n"), WRITE_SIZE_STR, WRITE_SIZE(mtd)));
++ T(YAFFS_TRACE_OS, (TSTR(" oobsize %d\n"), mtd->oobsize));
++ T(YAFFS_TRACE_OS, (TSTR(" erasesize %d\n"), mtd->erasesize));
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
++ T(YAFFS_TRACE_OS, (TSTR(" size %u\n"), mtd->size));
++#else
++ T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size));
++#endif
++
++#ifdef CONFIG_YAFFS_AUTO_YAFFS2
++
++ if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: auto selecting yaffs2\n")));
++ yaffsVersion = 2;
++ }
++
++ /* Added NCB 26/5/2006 for completeness */
++ if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: auto selecting yaffs1\n")));
++ yaffsVersion = 1;
++ }
++
++#endif
++
++ if (yaffsVersion == 2) {
++ /* Check for version 2 style functions */
++ if (!mtd->erase ||
++ !mtd->block_isbad ||
++ !mtd->block_markbad ||
++ !mtd->read ||
++ !mtd->write ||
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ !mtd->read_oob || !mtd->write_oob) {
++#else
++ !mtd->write_ecc ||
++ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
++#endif
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: MTD device does not support required "
++ "functions\n")));
++ return NULL;
++ }
++
++ if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
++ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
++ !options.inband_tags) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: MTD device does not have the "
++ "right page sizes\n")));
++ return NULL;
++ }
++ } else {
++ /* Check for V1 style functions */
++ if (!mtd->erase ||
++ !mtd->read ||
++ !mtd->write ||
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ !mtd->read_oob || !mtd->write_oob) {
++#else
++ !mtd->write_ecc ||
++ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
++#endif
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: MTD device does not support required "
++ "functions\n")));
++ return NULL;
++ }
++
++ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK ||
++ mtd->oobsize != YAFFS_BYTES_PER_SPARE) {
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs: MTD device does not support have the "
++ "right page sizes\n")));
++ return NULL;
++ }
++ }
++
++ /* OK, so if we got here, we have an MTD that's NAND and looks
++ * like it has the right capabilities
++ * Set the yaffs_Device up for mtd
++ */
++
++ if (!readOnly && !(mtd->flags & MTD_WRITEABLE)){
++ readOnly = 1;
++ printk(KERN_INFO "yaffs: mtd is read only, setting superblock read only");
++ sb->s_flags |= MS_RDONLY;
++ }
++
++ dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
++ context = kmalloc(sizeof(struct yaffs_LinuxContext),GFP_KERNEL);
++
++ if(!dev || !context ){
++ if(dev)
++ kfree(dev);
++ if(context)
++ kfree(context);
++ dev = NULL;
++ context = NULL;
++ }
++
++ if (!dev) {
++ /* Deep shit could not allocate device structure */
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs_read_super: Failed trying to allocate "
++ "yaffs_Device. \n")));
++ return NULL;
++ }
++ memset(dev, 0, sizeof(yaffs_Device));
++ param = &(dev->param);
++
++ memset(context,0,sizeof(struct yaffs_LinuxContext));
++ dev->osContext = context;
++ YINIT_LIST_HEAD(&(context->contextList));
++ context->dev = dev;
++ context->superBlock = sb;
++
++ dev->readOnly = readOnly;
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++ sb->s_fs_info = dev;
++#else
++ sb->u.generic_sbp = dev;
++#endif
++
++ dev->driverContext = mtd;
++ param->name = mtd->name;
++
++ /* Set up the memory size parameters.... */
++
++ nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
++
++ param->startBlock = 0;
++ param->endBlock = nBlocks - 1;
++ param->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
++ param->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
++ param->nReservedBlocks = 5;
++ param->nShortOpCaches = (options.no_cache) ? 0 : 10;
++ param->inbandTags = options.inband_tags;
++
++#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
++ param->disableLazyLoad = 1;
++#endif
++#ifdef CONFIG_YAFFS_XATTR
++ param->enableXattr = 1;
++#endif
++ if(options.lazy_loading_overridden)
++ param->disableLazyLoad = !options.lazy_loading_enabled;
++
++#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC
++ param->noTagsECC = 1;
++#endif
++
++#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND
++#else
++ param->deferDirectoryUpdate = 1;
++#endif
++
++ if(options.tags_ecc_overridden)
++ param->noTagsECC = !options.tags_ecc_on;
++
++#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
++ param->emptyLostAndFound = 1;
++#endif
++
++#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING
++ param->refreshPeriod = 0;
++#else
++ param->refreshPeriod = 500;
++#endif
++
++#ifdef CONFIG_YAFFS__ALWAYS_CHECK_CHUNK_ERASED
++ param->alwaysCheckErased = 1;
++#endif
++
++ if(options.empty_lost_and_found_overridden)
++ param->emptyLostAndFound = options.empty_lost_and_found;
++
++ /* ... and the functions. */
++ if (yaffsVersion == 2) {
++ param->writeChunkWithTagsToNAND =
++ nandmtd2_WriteChunkWithTagsToNAND;
++ param->readChunkWithTagsFromNAND =
++ nandmtd2_ReadChunkWithTagsFromNAND;
++ param->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
++ param->queryNANDBlock = nandmtd2_QueryNANDBlock;
++ yaffs_DeviceToLC(dev)->spareBuffer = YMALLOC(mtd->oobsize);
++ param->isYaffs2 = 1;
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ param->totalBytesPerChunk = mtd->writesize;
++ param->nChunksPerBlock = mtd->erasesize / mtd->writesize;
++#else
++ param->totalBytesPerChunk = mtd->oobblock;
++ param->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
++#endif
++ nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
++
++ param->startBlock = 0;
++ param->endBlock = nBlocks - 1;
++ } else {
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++ /* use the MTD interface in yaffs_mtdif1.c */
++ param->writeChunkWithTagsToNAND =
++ nandmtd1_WriteChunkWithTagsToNAND;
++ param->readChunkWithTagsFromNAND =
++ nandmtd1_ReadChunkWithTagsFromNAND;
++ param->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
++ param->queryNANDBlock = nandmtd1_QueryNANDBlock;
++#else
++ param->writeChunkToNAND = nandmtd_WriteChunkToNAND;
++ param->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
++#endif
++ param->isYaffs2 = 0;
++ }
++ /* ... and common functions */
++ param->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
++ param->initialiseNAND = nandmtd_InitialiseNAND;
++
++ yaffs_DeviceToLC(dev)->putSuperFunc = yaffs_MTDPutSuper;
++
++ param->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
++ param->gcControl = yaffs_gc_control_callback;
++
++ yaffs_DeviceToLC(dev)->superBlock= sb;
++
++
++#ifndef CONFIG_YAFFS_DOES_ECC
++ param->useNANDECC = 1;
++#endif
++
++#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
++ param->wideTnodesDisabled = 1;
++#endif
++
++ param->skipCheckpointRead = options.skip_checkpoint_read;
++ param->skipCheckpointWrite = options.skip_checkpoint_write;
++
++ down(&yaffs_context_lock);
++ /* Get a mount id */
++ found = 0;
++ for(mount_id=0; ! found; mount_id++){
++ found = 1;
++ ylist_for_each(l,&yaffs_context_list){
++ context_iterator = ylist_entry(l,struct yaffs_LinuxContext,contextList);
++ if(context_iterator->mount_id == mount_id)
++ found = 0;
++ }
++ }
++ context->mount_id = mount_id;
++
++ ylist_add_tail(&(yaffs_DeviceToLC(dev)->contextList), &yaffs_context_list);
++ up(&yaffs_context_lock);
++
++ /* Directory search handling...*/
++ YINIT_LIST_HEAD(&(yaffs_DeviceToLC(dev)->searchContexts));
++ param->removeObjectCallback = yaffs_RemoveObjectCallback;
++
++ init_MUTEX(&(yaffs_DeviceToLC(dev)->grossLock));
++
++ yaffs_GrossLock(dev);
++
++ err = yaffs_GutsInitialise(dev);
++
++ T(YAFFS_TRACE_OS,
++ (TSTR("yaffs_read_super: guts initialised %s\n"),
++ (err == YAFFS_OK) ? "OK" : "FAILED"));
++
++ if(err == YAFFS_OK)
++ yaffs_BackgroundStart(dev);
++
++ if(!context->bgThread)
++ param->deferDirectoryUpdate = 0;
++
++
++ /* Release lock before yaffs_get_inode() */
++ yaffs_GrossUnlock(dev);
++
++ /* Create root inode */
++ if (err == YAFFS_OK)
++ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
++ yaffs_Root(dev));
++
++ if (!inode)
++ return NULL;
++
++ inode->i_op = &yaffs_dir_inode_operations;
++ inode->i_fop = &yaffs_dir_operations;
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: got root inode\n")));
++
++ root = d_alloc_root(inode);
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n")));
++
++ if (!root) {
++ iput(inode);
++ return NULL;
++ }
++ sb->s_root = root;
++ sb->s_dirt = !dev->isCheckpointed;
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs_read_super: isCheckpointed %d\n"),
++ dev->isCheckpointed));
++
++ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: done\n")));
++ return sb;
++}
++
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
++ int silent)
++{
++ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs_read_super(struct file_system_type *fs,
++ int flags, const char *dev_name,
++ void *data, struct vfsmount *mnt)
++{
++
++ return get_sb_bdev(fs, flags, dev_name, data,
++ yaffs_internal_read_super_mtd, mnt);
++}
++#else
++static struct super_block *yaffs_read_super(struct file_system_type *fs,
++ int flags, const char *dev_name,
++ void *data)
++{
++
++ return get_sb_bdev(fs, flags, dev_name, data,
++ yaffs_internal_read_super_mtd);
++}
++#endif
++
++static struct file_system_type yaffs_fs_type = {
++ .owner = THIS_MODULE,
++ .name = "yaffs",
++ .get_sb = yaffs_read_super,
++ .kill_sb = kill_block_super,
++ .fs_flags = FS_REQUIRES_DEV,
++};
++#else
++static struct super_block *yaffs_read_super(struct super_block *sb, void *data,
++ int silent)
++{
++ return yaffs_internal_read_super(1, sb, data, silent);
++}
++
++static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
++ FS_REQUIRES_DEV);
++#endif
++
++
++#ifdef CONFIG_YAFFS_YAFFS2
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
++static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
++ int silent)
++{
++ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
++}
++
++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
++static int yaffs2_read_super(struct file_system_type *fs,
++ int flags, const char *dev_name, void *data,
++ struct vfsmount *mnt)
++{
++ return get_sb_bdev(fs, flags, dev_name, data,
++ yaffs2_internal_read_super_mtd, mnt);
++}
++#else
++static struct super_block *yaffs2_read_super(struct file_system_type *fs,
++ int flags, const char *dev_name,
++ void *data)
++{
++
++ return get_sb_bdev(fs, flags, dev_name, data,
++ yaffs2_internal_read_super_mtd);
++}
++#endif
++
++static struct file_system_type yaffs2_fs_type = {
++ .owner = THIS_MODULE,
++ .name = "yaffs2",
++ .get_sb = yaffs2_read_super,
++ .kill_sb = kill_block_super,
++ .fs_flags = FS_REQUIRES_DEV,
++};
++#else
++static struct super_block *yaffs2_read_super(struct super_block *sb,
++ void *data, int silent)
++{
++ return yaffs_internal_read_super(2, sb, data, silent);
++}
++
++static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
++ FS_REQUIRES_DEV);
++#endif
++
++#endif /* CONFIG_YAFFS_YAFFS2 */
++
++static struct proc_dir_entry *my_proc_entry;
++static struct proc_dir_entry *debug_proc_entry;
++
++static char *yaffs_dump_dev_part0(char *buf, yaffs_Device * dev)
++{
++ buf += sprintf(buf, "startBlock......... %d\n", dev->param.startBlock);
++ buf += sprintf(buf, "endBlock........... %d\n", dev->param.endBlock);
++ buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->param.totalBytesPerChunk);
++ buf += sprintf(buf, "useNANDECC......... %d\n", dev->param.useNANDECC);
++ buf += sprintf(buf, "noTagsECC.......... %d\n", dev->param.noTagsECC);
++ buf += sprintf(buf, "isYaffs2........... %d\n", dev->param.isYaffs2);
++ buf += sprintf(buf, "inbandTags......... %d\n", dev->param.inbandTags);
++ buf += sprintf(buf, "emptyLostAndFound.. %d\n", dev->param.emptyLostAndFound);
++ buf += sprintf(buf, "disableLazyLoad.... %d\n", dev->param.disableLazyLoad);
++ buf += sprintf(buf, "refreshPeriod...... %d\n", dev->param.refreshPeriod);
++ buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->param.nShortOpCaches);
++ buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->param.nReservedBlocks);
++ buf += sprintf(buf, "alwaysCheckErased.. %d\n", dev->param.alwaysCheckErased);
++
++ buf += sprintf(buf, "\n");
++
++ return buf;
++}
++
++
++static char *yaffs_dump_dev_part1(char *buf, yaffs_Device * dev)
++{
++ buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
++ buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits);
++ buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize);
++ buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks);
++ buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
++ buf += sprintf(buf, "\n");
++ buf += sprintf(buf, "nTnodes............ %d\n", dev->nTnodes);
++ buf += sprintf(buf, "nObjects........... %d\n", dev->nObjects);
++ buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
++ buf += sprintf(buf, "\n");
++ buf += sprintf(buf, "nPageWrites........ %u\n", dev->nPageWrites);
++ buf += sprintf(buf, "nPageReads......... %u\n", dev->nPageReads);
++ buf += sprintf(buf, "nBlockErasures..... %u\n", dev->nBlockErasures);
++ buf += sprintf(buf, "nGCCopies.......... %u\n", dev->nGCCopies);
++ buf += sprintf(buf, "allGCs............. %u\n", dev->allGCs);
++ buf += sprintf(buf, "passiveGCs......... %u\n", dev->passiveGCs);
++ buf += sprintf(buf, "oldestDirtyGCs..... %u\n", dev->oldestDirtyGCs);
++ buf += sprintf(buf, "nGCBlocks.......... %u\n", dev->nGCBlocks);
++ buf += sprintf(buf, "backgroundGCs...... %u\n", dev->backgroundGCs);
++ buf += sprintf(buf, "nRetriedWrites..... %u\n", dev->nRetriedWrites);
++ buf += sprintf(buf, "nRetireBlocks...... %u\n", dev->nRetiredBlocks);
++ buf += sprintf(buf, "eccFixed........... %u\n", dev->eccFixed);
++ buf += sprintf(buf, "eccUnfixed......... %u\n", dev->eccUnfixed);
++ buf += sprintf(buf, "tagsEccFixed....... %u\n", dev->tagsEccFixed);
++ buf += sprintf(buf, "tagsEccUnfixed..... %u\n", dev->tagsEccUnfixed);
++ buf += sprintf(buf, "cacheHits.......... %u\n", dev->cacheHits);
++ buf += sprintf(buf, "nDeletedFiles...... %u\n", dev->nDeletedFiles);
++ buf += sprintf(buf, "nUnlinkedFiles..... %u\n", dev->nUnlinkedFiles);
++ buf += sprintf(buf, "refreshCount....... %u\n", dev->refreshCount);
++ buf +=
++ sprintf(buf, "nBackgroudDeletions %u\n", dev->nBackgroundDeletions);
++
++ return buf;
++}
++
++static int yaffs_proc_read(char *page,
++ char **start,
++ off_t offset, int count, int *eof, void *data)
++{
++ struct ylist_head *item;
++ char *buf = page;
++ int step = offset;
++ int n = 0;
++
++ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
++ * We use 'offset' (*ppos) to indicate where we are in devList.
++ * This also assumes the user has posted a read buffer large
++ * enough to hold the complete output; but that's life in /proc.
++ */
++
++ *(int *)start = 1;
++
++ /* Print header first */
++ if (step == 0)
++ buf += sprintf(buf, "Multi-version YAFFS built:" __DATE__ " " __TIME__"\n");
++ else if (step == 1)
++ buf += sprintf(buf,"\n");
++ else {
++ step-=2;
++
++ down(&yaffs_context_lock);
++
++ /* Locate and print the Nth entry. Order N-squared but N is small. */
++ ylist_for_each(item, &yaffs_context_list) {
++ struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
++ yaffs_Device *dev = dc->dev;
++
++ if (n < (step & ~1)) {
++ n+=2;
++ continue;
++ }
++ if((step & 1)==0){
++ buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name);
++ buf = yaffs_dump_dev_part0(buf, dev);
++ } else
++ buf = yaffs_dump_dev_part1(buf, dev);
++
++ break;
++ }
++ up(&yaffs_context_lock);
++ }
++
++ return buf - page < count ? buf - page : count;
++}
++
++static int yaffs_stats_proc_read(char *page,
++ char **start,
++ off_t offset, int count, int *eof, void *data)
++{
++ struct ylist_head *item;
++ char *buf = page;
++ int n = 0;
++
++ down(&yaffs_context_lock);
++
++ /* Locate and print the Nth entry. Order N-squared but N is small. */
++ ylist_for_each(item, &yaffs_context_list) {
++ struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
++ yaffs_Device *dev = dc->dev;
++
++ int erasedChunks;
++
++ erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
++
++ buf += sprintf(buf,"%d, %d, %d, %u, %u, %u, %u\n",
++ n, dev->nFreeChunks, erasedChunks,
++ dev->backgroundGCs, dev->oldestDirtyGCs,
++ dev->nObjects, dev->nTnodes);
++ }
++ up(&yaffs_context_lock);
++
++
++ return buf - page < count ? buf - page : count;
++}
++
++/**
++ * Set the verbosity of the warnings and error messages.
++ *
++ * Note that the names can only be a..z or _ with the current code.
++ */
++
++static struct {
++ char *mask_name;
++ unsigned mask_bitfield;
++} mask_flags[] = {
++ {"allocate", YAFFS_TRACE_ALLOCATE},
++ {"always", YAFFS_TRACE_ALWAYS},
++ {"background", YAFFS_TRACE_BACKGROUND},
++ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
++ {"buffers", YAFFS_TRACE_BUFFERS},
++ {"bug", YAFFS_TRACE_BUG},
++ {"checkpt", YAFFS_TRACE_CHECKPOINT},
++ {"deletion", YAFFS_TRACE_DELETION},
++ {"erase", YAFFS_TRACE_ERASE},
++ {"error", YAFFS_TRACE_ERROR},
++ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
++ {"gc", YAFFS_TRACE_GC},
++ {"lock", YAFFS_TRACE_LOCK},
++ {"mtd", YAFFS_TRACE_MTD},
++ {"nandaccess", YAFFS_TRACE_NANDACCESS},
++ {"os", YAFFS_TRACE_OS},
++ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
++ {"scan", YAFFS_TRACE_SCAN},
++ {"tracing", YAFFS_TRACE_TRACING},
++ {"sync", YAFFS_TRACE_SYNC},
++ {"write", YAFFS_TRACE_WRITE},
++
++ {"verify", YAFFS_TRACE_VERIFY},
++ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
++ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
++ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
++
++ {"all", 0xffffffff},
++ {"none", 0},
++ {NULL, 0},
++};
++
++#define MAX_MASK_NAME_LENGTH 40
++static int yaffs_proc_write_trace_options(struct file *file, const char *buf,
++ unsigned long count, void *data)
++{
++ unsigned rg = 0, mask_bitfield;
++ char *end;
++ char *mask_name;
++ const char *x;
++ char substring[MAX_MASK_NAME_LENGTH + 1];
++ int i;
++ int done = 0;
++ int add, len = 0;
++ int pos = 0;
++
++ rg = yaffs_traceMask;
++
++ while (!done && (pos < count)) {
++ done = 1;
++ while ((pos < count) && isspace(buf[pos]))
++ pos++;
++
++ switch (buf[pos]) {
++ case '+':
++ case '-':
++ case '=':
++ add = buf[pos];
++ pos++;
++ break;
++
++ default:
++ add = ' ';
++ break;
++ }
++ mask_name = NULL;
++
++ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
++
++ if (end > buf + pos) {
++ mask_name = "numeral";
++ len = end - (buf + pos);
++ pos += len;
++ done = 0;
++ } else {
++ for (x = buf + pos, i = 0;
++ (*x == '_' || (*x >= 'a' && *x <= 'z')) &&
++ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++)
++ substring[i] = *x;
++ substring[i] = '\0';
++
++ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
++ if (strcmp(substring, mask_flags[i].mask_name) == 0) {
++ mask_name = mask_flags[i].mask_name;
++ mask_bitfield = mask_flags[i].mask_bitfield;
++ done = 0;
++ break;
++ }
++ }
++ }
++
++ if (mask_name != NULL) {
++ done = 0;
++ switch (add) {
++ case '-':
++ rg &= ~mask_bitfield;
++ break;
++ case '+':
++ rg |= mask_bitfield;
++ break;
++ case '=':
++ rg = mask_bitfield;
++ break;
++ default:
++ rg |= mask_bitfield;
++ break;
++ }
++ }
++ }
++
++ yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
++
++ printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask);
++
++ if (rg & YAFFS_TRACE_ALWAYS) {
++ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
++ char flag;
++ flag = ((rg & mask_flags[i].mask_bitfield) ==
++ mask_flags[i].mask_bitfield) ? '+' : '-';
++ printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
++ }
++ }
++
++ return count;
++}
++
++
++static int yaffs_proc_write(struct file *file, const char *buf,
++ unsigned long count, void *data)
++{
++ return yaffs_proc_write_trace_options(file, buf, count, data);
++}
++
++/* Stuff to handle installation of file systems */
++struct file_system_to_install {
++ struct file_system_type *fst;
++ int installed;
++};
++
++static struct file_system_to_install fs_to_install[] = {
++ {&yaffs_fs_type, 0},
++ {&yaffs2_fs_type, 0},
++ {NULL, 0}
++};
++
++static int __init init_yaffs_fs(void)
++{
++ int error = 0;
++ struct file_system_to_install *fsinst;
++
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n")));
++
++#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR(" \n\n\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n\n")));
++#endif
++
++
++
++
++ init_MUTEX(&yaffs_context_lock);
++
++ /* Install the proc_fs entries */
++ my_proc_entry = create_proc_entry("yaffs",
++ S_IRUGO | S_IFREG,
++ YPROC_ROOT);
++
++ if (my_proc_entry) {
++ my_proc_entry->write_proc = yaffs_proc_write;
++ my_proc_entry->read_proc = yaffs_proc_read;
++ my_proc_entry->data = NULL;
++ } else
++ return -ENOMEM;
++
++ debug_proc_entry = create_proc_entry("yaffs_stats",
++ S_IRUGO | S_IFREG,
++ YPROC_ROOT);
++
++ if (debug_proc_entry) {
++ debug_proc_entry->write_proc = NULL;
++ debug_proc_entry->read_proc = yaffs_stats_proc_read;
++ debug_proc_entry->data = NULL;
++ } else
++ return -ENOMEM;
++
++ /* Now add the file system entries */
++
++ fsinst = fs_to_install;
++
++ while (fsinst->fst && !error) {
++ error = register_filesystem(fsinst->fst);
++ if (!error)
++ fsinst->installed = 1;
++ fsinst++;
++ }
++
++ /* Any errors? uninstall */
++ if (error) {
++ fsinst = fs_to_install;
++
++ while (fsinst->fst) {
++ if (fsinst->installed) {
++ unregister_filesystem(fsinst->fst);
++ fsinst->installed = 0;
++ }
++ fsinst++;
++ }
++ }
++
++ return error;
++}
++
++static void __exit exit_yaffs_fs(void)
++{
++
++ struct file_system_to_install *fsinst;
++
++ T(YAFFS_TRACE_ALWAYS,
++ (TSTR("yaffs built " __DATE__ " " __TIME__ " removing. \n")));
++
++ remove_proc_entry("yaffs", YPROC_ROOT);
++ remove_proc_entry("yaffs_stats", YPROC_ROOT);
++
++ fsinst = fs_to_install;
++
++ while (fsinst->fst) {
++ if (fsinst->installed) {
++ unregister_filesystem(fsinst->fst);
++ fsinst->installed = 0;
++ }
++ fsinst++;
++ }
++}
++
++module_init(init_yaffs_fs)
++module_exit(exit_yaffs_fs)
++
++MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
++MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010");
++MODULE_LICENSE("GPL");
+diff -Nrup a/fs/yaffs2/yaffs_yaffs1.c b/fs/yaffs2/yaffs_yaffs1.c
+--- a/fs/yaffs2/yaffs_yaffs1.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_yaffs1.c 2010-10-03 18:03:47.535000365 +0300
+@@ -0,0 +1,465 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++#include "yaffs_yaffs1.h"
++#include "yportenv.h"
++#include "yaffs_trace.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_getblockinfo.h"
++#include "yaffs_nand.h"
++
++
++int yaffs1_Scan(yaffs_Device *dev)
++{
++ yaffs_ExtendedTags tags;
++ int blk;
++ int blockIterator;
++ int startIterator;
++ int endIterator;
++ int result;
++
++ int chunk;
++ int c;
++ int deleted;
++ yaffs_BlockState state;
++ yaffs_Object *hardList = NULL;
++ yaffs_BlockInfo *bi;
++ __u32 sequenceNumber;
++ yaffs_ObjectHeader *oh;
++ yaffs_Object *in;
++ yaffs_Object *parent;
++
++ int alloc_failed = 0;
++
++ struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
++
++
++ __u8 *chunkData;
++
++
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("yaffs1_Scan starts intstartblk %d intendblk %d..." TENDSTR),
++ dev->internalStartBlock, dev->internalEndBlock));
++
++ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++
++ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
++
++ /* Scan all the blocks to determine their state */
++ bi = dev->blockInfo;
++ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
++ yaffs_ClearChunkBits(dev, blk);
++ bi->pagesInUse = 0;
++ bi->softDeletions = 0;
++
++ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
++
++ bi->blockState = state;
++ bi->sequenceNumber = sequenceNumber;
++
++ if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
++ bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
++
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
++ state, sequenceNumber));
++
++ if (state == YAFFS_BLOCK_STATE_DEAD) {
++ T(YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("block %d is bad" TENDSTR), blk));
++ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("Block empty " TENDSTR)));
++ dev->nErasedBlocks++;
++ dev->nFreeChunks += dev->param.nChunksPerBlock;
++ }
++ bi++;
++ }
++
++ startIterator = dev->internalStartBlock;
++ endIterator = dev->internalEndBlock;
++
++ /* For each block.... */
++ for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
++ blockIterator++) {
++
++ YYIELD();
++
++ YYIELD();
++
++ blk = blockIterator;
++
++ bi = yaffs_GetBlockInfo(dev, blk);
++ state = bi->blockState;
++
++ deleted = 0;
++
++ /* For each chunk in each block that needs scanning....*/
++ for (c = 0; !alloc_failed && c < dev->param.nChunksPerBlock &&
++ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
++ /* Read the tags and decide what to do */
++ chunk = blk * dev->param.nChunksPerBlock + c;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
++ &tags);
++
++ /* Let's have a good look at this chunk... */
++
++ if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
++ /* YAFFS1 only...
++ * A deleted chunk
++ */
++ deleted++;
++ dev->nFreeChunks++;
++ /*T((" %d %d deleted\n",blk,c)); */
++ } else if (!tags.chunkUsed) {
++ /* An unassigned chunk in the block
++ * This means that either the block is empty or
++ * this is the one being allocated from
++ */
++
++ if (c == 0) {
++ /* We're looking at the first chunk in the block so the block is unused */
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ } else {
++ /* this is the block being allocated from */
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ (" Allocating from %d %d" TENDSTR),
++ blk, c));
++ state = YAFFS_BLOCK_STATE_ALLOCATING;
++ dev->allocationBlock = blk;
++ dev->allocationPage = c;
++ dev->allocationBlockFinder = blk;
++ /* Set block finder here to encourage the allocator to go forth from here. */
++
++ }
++
++ dev->nFreeChunks += (dev->param.nChunksPerBlock - c);
++ } else if (tags.chunkId > 0) {
++ /* chunkId > 0 so it is a data chunk... */
++ unsigned int endpos;
++
++ yaffs_SetChunkBit(dev, blk, c);
++ bi->pagesInUse++;
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,
++ tags.
++ objectId,
++ YAFFS_OBJECT_TYPE_FILE);
++ /* PutChunkIntoFile checks for a clash (two data chunks with
++ * the same chunkId).
++ */
++
++ if (!in)
++ alloc_failed = 1;
++
++ if (in) {
++ if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
++ alloc_failed = 1;
++ }
++
++ endpos =
++ (tags.chunkId - 1) * dev->nDataBytesPerChunk +
++ tags.byteCount;
++ if (in &&
++ in->variantType == YAFFS_OBJECT_TYPE_FILE
++ && in->variant.fileVariant.scannedFileSize <
++ endpos) {
++ in->variant.fileVariant.
++ scannedFileSize = endpos;
++ if (!dev->param.useHeaderFileSize) {
++ in->variant.fileVariant.
++ fileSize =
++ in->variant.fileVariant.
++ scannedFileSize;
++ }
++
++ }
++ /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
++ } else {
++ /* chunkId == 0, so it is an ObjectHeader.
++ * Thus, we read in the object header and make the object
++ */
++ yaffs_SetChunkBit(dev, blk, c);
++ bi->pagesInUse++;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
++ chunkData,
++ NULL);
++
++ oh = (yaffs_ObjectHeader *) chunkData;
++
++ in = yaffs_FindObjectByNumber(dev,
++ tags.objectId);
++ if (in && in->variantType != oh->type) {
++ /* This should not happen, but somehow
++ * Wev'e ended up with an objectId that has been reused but not yet
++ * deleted, and worse still it has changed type. Delete the old object.
++ */
++
++ yaffs_DeleteObject(in);
++
++ in = 0;
++ }
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,
++ tags.
++ objectId,
++ oh->type);
++
++ if (!in)
++ alloc_failed = 1;
++
++ if (in && oh->shadowsObject > 0) {
++
++ struct yaffs_ShadowFixerStruct *fixer;
++ fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
++ if (fixer) {
++ fixer->next = shadowFixerList;
++ shadowFixerList = fixer;
++ fixer->objectId = tags.objectId;
++ fixer->shadowedId = oh->shadowsObject;
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ (" Shadow fixer: %d shadows %d" TENDSTR),
++ fixer->objectId, fixer->shadowedId));
++
++ }
++
++ }
++
++ if (in && in->valid) {
++ /* We have already filled this one. We have a duplicate and need to resolve it. */
++
++ unsigned existingSerial = in->serial;
++ unsigned newSerial = tags.serialNumber;
++
++ if (((existingSerial + 1) & 3) == newSerial) {
++ /* Use new one - destroy the exisiting one */
++ yaffs_DeleteChunk(dev,
++ in->hdrChunk,
++ 1, __LINE__);
++ in->valid = 0;
++ } else {
++ /* Use existing - destroy this one. */
++ yaffs_DeleteChunk(dev, chunk, 1,
++ __LINE__);
++ }
++ }
++
++ if (in && !in->valid &&
++ (tags.objectId == YAFFS_OBJECTID_ROOT ||
++ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
++ /* We only load some info, don't fiddle with directory structure */
++ in->valid = 1;
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++ in->hdrChunk = chunk;
++ in->serial = tags.serialNumber;
++
++ } else if (in && !in->valid) {
++ /* we need to load this info */
++
++ in->valid = 1;
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++ in->hdrChunk = chunk;
++ in->serial = tags.serialNumber;
++
++ yaffs_SetObjectNameFromOH(in, oh);
++ in->dirty = 0;
++
++ /* directory stuff...
++ * hook up to parent
++ */
++
++ parent =
++ yaffs_FindOrCreateObjectByNumber
++ (dev, oh->parentObjectId,
++ YAFFS_OBJECT_TYPE_DIRECTORY);
++ if (!parent)
++ alloc_failed = 1;
++ if (parent && parent->variantType ==
++ YAFFS_OBJECT_TYPE_UNKNOWN) {
++ /* Set up as a directory */
++ parent->variantType =
++ YAFFS_OBJECT_TYPE_DIRECTORY;
++ YINIT_LIST_HEAD(&parent->variant.
++ directoryVariant.
++ children);
++ } else if (!parent || parent->variantType !=
++ YAFFS_OBJECT_TYPE_DIRECTORY) {
++ /* Hoosterman, another problem....
++ * We're trying to use a non-directory as a directory
++ */
++
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
++ TENDSTR)));
++ parent = dev->lostNFoundDir;
++ }
++
++ yaffs_AddObjectToDirectory(parent, in);
++
++ if (0 && (parent == dev->deletedDir ||
++ parent == dev->unlinkedDir)) {
++ in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
++ dev->nDeletedFiles++;
++ }
++ /* Note re hardlinks.
++ * Since we might scan a hardlink before its equivalent object is scanned
++ * we put them all in a list.
++ * After scanning is complete, we should have all the objects, so we run through this
++ * list and fix up all the chains.
++ */
++
++ switch (in->variantType) {
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* Todo got a problem */
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++ if (dev->param.useHeaderFileSize)
++
++ in->variant.fileVariant.
++ fileSize =
++ oh->fileSize;
++
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ in->variant.hardLinkVariant.
++ equivalentObjectId =
++ oh->equivalentObjectId;
++ in->hardLinks.next =
++ (struct ylist_head *)
++ hardList;
++ hardList = in;
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ in->variant.symLinkVariant.alias =
++ yaffs_CloneString(oh->alias);
++ if (!in->variant.symLinkVariant.alias)
++ alloc_failed = 1;
++ break;
++ }
++
++ }
++ }
++ }
++
++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++ /* If we got this far while scanning, then the block is fully allocated.*/
++ state = YAFFS_BLOCK_STATE_FULL;
++ }
++
++ if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
++ /* If the block was partially allocated then treat it as fully allocated.*/
++ state = YAFFS_BLOCK_STATE_FULL;
++ dev->allocationBlock = -1;
++ }
++
++ bi->blockState = state;
++
++ /* Now let's see if it was dirty */
++ if (bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
++ yaffs_BlockBecameDirty(dev, blk);
++ }
++
++ }
++
++
++ /* Ok, we've done all the scanning.
++ * Fix up the hard link chains.
++ * We should now have scanned all the objects, now it's time to add these
++ * hardlinks.
++ */
++
++ yaffs_HardlinkFixup(dev, hardList);
++
++ /* Fix up any shadowed objects */
++ {
++ struct yaffs_ShadowFixerStruct *fixer;
++ yaffs_Object *obj;
++
++ while (shadowFixerList) {
++ fixer = shadowFixerList;
++ shadowFixerList = fixer->next;
++ /* Complete the rename transaction by deleting the shadowed object
++ * then setting the object header to unshadowed.
++ */
++ obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
++ if (obj)
++ yaffs_DeleteObject(obj);
++
++ obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
++
++ if (obj)
++ yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0, NULL);
++
++ YFREE(fixer);
++ }
++ }
++
++ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++
++ if (alloc_failed)
++ return YAFFS_FAIL;
++
++ T(YAFFS_TRACE_SCAN, (TSTR("yaffs1_Scan ends" TENDSTR)));
++
++
++ return YAFFS_OK;
++}
++
+diff -Nrup a/fs/yaffs2/yaffs_yaffs1.h b/fs/yaffs2/yaffs_yaffs1.h
+--- a/fs/yaffs2/yaffs_yaffs1.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_yaffs1.h 2010-10-03 18:03:47.551000365 +0300
+@@ -0,0 +1,22 @@
++/*
++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU Lesser General Public License version 2.1 as
++ * published by the Free Software Foundation.
++ *
++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
++ */
++
++#ifndef __YAFFS_YAFFS1_H__
++#define __YAFFS_YAFFS1_H__
++
++#include "yaffs_guts.h"
++int yaffs1_Scan(yaffs_Device *dev);
++
++#endif
+diff -Nrup a/fs/yaffs2/yaffs_yaffs2.c b/fs/yaffs2/yaffs_yaffs2.c
+--- a/fs/yaffs2/yaffs_yaffs2.c 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_yaffs2.c 2010-10-03 18:03:47.536000367 +0300
+@@ -0,0 +1,1540 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++
++#include "yaffs_guts.h"
++#include "yaffs_trace.h"
++#include "yaffs_yaffs2.h"
++#include "yaffs_checkptrw.h"
++#include "yaffs_bitmap.h"
++#include "yaffs_qsort.h"
++#include "yaffs_nand.h"
++#include "yaffs_getblockinfo.h"
++#include "yaffs_verify.h"
++
++/*
++ * Checkpoints are really no benefit on very small partitions.
++ *
++ * To save space on small partitions don't bother with checkpoints unless
++ * the partition is at least this big.
++ */
++#define YAFFS_CHECKPOINT_MIN_BLOCKS 60
++
++#define YAFFS_SMALL_HOLE_THRESHOLD 4
++
++
++/*
++ * Oldest Dirty Sequence Number handling.
++ */
++
++/* yaffs2_CalcOldestDirtySequence()
++ * yaffs2_FindOldestDirtySequence()
++ * Calculate the oldest dirty sequence number if we don't know it.
++ */
++void yaffs2_CalcOldestDirtySequence(yaffs_Device *dev)
++{
++ int i;
++ unsigned seq;
++ unsigned blockNo = 0;
++ yaffs_BlockInfo *b;
++
++ if(!dev->param.isYaffs2)
++ return;
++
++ /* Find the oldest dirty sequence number. */
++ seq = dev->sequenceNumber + 1;
++ b = dev->blockInfo;
++ for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
++ if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
++ (b->pagesInUse - b->softDeletions) < dev->param.nChunksPerBlock &&
++ b->sequenceNumber < seq) {
++ seq = b->sequenceNumber;
++ blockNo = i;
++ }
++ b++;
++ }
++
++ if(blockNo){
++ dev->oldestDirtySequence = seq;
++ dev->oldestDirtyBlock = blockNo;
++ }
++
++}
++
++
++void yaffs2_FindOldestDirtySequence(yaffs_Device *dev)
++{
++ if(!dev->param.isYaffs2)
++ return;
++
++ if(!dev->oldestDirtySequence)
++ yaffs2_CalcOldestDirtySequence(dev);
++}
++
++/*
++ * yaffs_ClearOldestDirtySequence()
++ * Called when a block is erased or marked bad. (ie. when its sequenceNumber
++ * becomes invalid). If the value matches the oldest then we clear
++ * dev->oldestDirtySequence to force its recomputation.
++ */
++void yaffs2_ClearOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi)
++{
++
++ if(!dev->param.isYaffs2)
++ return;
++
++ if(!bi || bi->sequenceNumber == dev->oldestDirtySequence){
++ dev->oldestDirtySequence = 0;
++ dev->oldestDirtyBlock = 0;
++ }
++}
++
++/*
++ * yaffs2_UpdateOldestDirtySequence()
++ * Update the oldest dirty sequence number whenever we dirty a block.
++ * Only do this if the oldestDirtySequence is actually being tracked.
++ */
++void yaffs2_UpdateOldestDirtySequence(yaffs_Device *dev, unsigned blockNo, yaffs_BlockInfo *bi)
++{
++ if(!dev->param.isYaffs2)
++ return;
++
++ if(dev->oldestDirtySequence){
++ if(dev->oldestDirtySequence > bi->sequenceNumber){
++ dev->oldestDirtySequence = bi->sequenceNumber;
++ dev->oldestDirtyBlock = blockNo;
++ }
++ }
++}
++
++int yaffs2_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
++ yaffs_BlockInfo *bi)
++{
++
++ if (!dev->param.isYaffs2)
++ return 1; /* disqualification only applies to yaffs2. */
++
++ if (!bi->hasShrinkHeader)
++ return 1; /* can gc */
++
++ yaffs2_FindOldestDirtySequence(dev);
++
++ /* Can't do gc of this block if there are any blocks older than this one that have
++ * discarded pages.
++ */
++ return (bi->sequenceNumber <= dev->oldestDirtySequence);
++}
++
++/*
++ * yaffs2_FindRefreshBlock()
++ * periodically finds the oldest full block by sequence number for refreshing.
++ * Only for yaffs2.
++ */
++__u32 yaffs2_FindRefreshBlock(yaffs_Device *dev)
++{
++ __u32 b ;
++
++ __u32 oldest = 0;
++ __u32 oldestSequence = 0;
++
++ yaffs_BlockInfo *bi;
++
++ if(!dev->param.isYaffs2)
++ return oldest;
++
++ /*
++ * If refresh period < 10 then refreshing is disabled.
++ */
++ if(dev->param.refreshPeriod < 10)
++ return oldest;
++
++ /*
++ * Fix broken values.
++ */
++ if(dev->refreshSkip > dev->param.refreshPeriod)
++ dev->refreshSkip = dev->param.refreshPeriod;
++
++ if(dev->refreshSkip > 0)
++ return oldest;
++
++ /*
++ * Refresh skip is now zero.
++ * We'll do a refresh this time around....
++ * Update the refresh skip and find the oldest block.
++ */
++ dev->refreshSkip = dev->param.refreshPeriod;
++ dev->refreshCount++;
++ bi = dev->blockInfo;
++ for (b = dev->internalStartBlock; b <=dev->internalEndBlock; b++){
++
++ if (bi->blockState == YAFFS_BLOCK_STATE_FULL){
++
++ if(oldest < 1 ||
++ bi->sequenceNumber < oldestSequence){
++ oldest = b;
++ oldestSequence = bi->sequenceNumber;
++ }
++ }
++ bi++;
++ }
++
++ if (oldest > 0) {
++ T(YAFFS_TRACE_GC,
++ (TSTR("GC refresh count %d selected block %d with sequenceNumber %d" TENDSTR),
++ dev->refreshCount, oldest, oldestSequence));
++ }
++
++ return oldest;
++}
++
++int yaffs2_CheckpointRequired(yaffs_Device *dev)
++{
++ int nblocks;
++
++ if(!dev->param.isYaffs2)
++ return 0;
++
++ nblocks = dev->internalEndBlock - dev->internalStartBlock + 1 ;
++
++ return !dev->param.skipCheckpointWrite &&
++ !dev->readOnly &&
++ (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS);
++}
++
++int yaffs2_CalcCheckpointBlocksRequired(yaffs_Device *dev)
++{
++ int retval;
++
++ if(!dev->param.isYaffs2)
++ return 0;
++
++ if (!dev->nCheckpointBlocksRequired &&
++ yaffs2_CheckpointRequired(dev)){
++ /* Not a valid value so recalculate */
++ int nBytes = 0;
++ int nBlocks;
++ int devBlocks = (dev->param.endBlock - dev->param.startBlock + 1);
++
++ nBytes += sizeof(yaffs_CheckpointValidity);
++ nBytes += sizeof(yaffs_CheckpointDevice);
++ nBytes += devBlocks * sizeof(yaffs_BlockInfo);
++ nBytes += devBlocks * dev->chunkBitmapStride;
++ nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjects);
++ nBytes += (dev->tnodeSize + sizeof(__u32)) * (dev->nTnodes);
++ nBytes += sizeof(yaffs_CheckpointValidity);
++ nBytes += sizeof(__u32); /* checksum*/
++
++ /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
++
++ nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->param.nChunksPerBlock)) + 3;
++
++ dev->nCheckpointBlocksRequired = nBlocks;
++ }
++
++ retval = dev->nCheckpointBlocksRequired - dev->blocksInCheckpoint;
++ if(retval < 0)
++ retval = 0;
++ return retval;
++}
++
++/*--------------------- Checkpointing --------------------*/
++
++
++static int yaffs2_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
++{
++ yaffs_CheckpointValidity cp;
++
++ memset(&cp, 0, sizeof(cp));
++
++ cp.structType = sizeof(cp);
++ cp.magic = YAFFS_MAGIC;
++ cp.version = YAFFS_CHECKPOINT_VERSION;
++ cp.head = (head) ? 1 : 0;
++
++ return (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
++ 1 : 0;
++}
++
++static int yaffs2_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
++{
++ yaffs_CheckpointValidity cp;
++ int ok;
++
++ ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++ if (ok)
++ ok = (cp.structType == sizeof(cp)) &&
++ (cp.magic == YAFFS_MAGIC) &&
++ (cp.version == YAFFS_CHECKPOINT_VERSION) &&
++ (cp.head == ((head) ? 1 : 0));
++ return ok ? 1 : 0;
++}
++
++static void yaffs2_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
++ yaffs_Device *dev)
++{
++ cp->nErasedBlocks = dev->nErasedBlocks;
++ cp->allocationBlock = dev->allocationBlock;
++ cp->allocationPage = dev->allocationPage;
++ cp->nFreeChunks = dev->nFreeChunks;
++
++ cp->nDeletedFiles = dev->nDeletedFiles;
++ cp->nUnlinkedFiles = dev->nUnlinkedFiles;
++ cp->nBackgroundDeletions = dev->nBackgroundDeletions;
++ cp->sequenceNumber = dev->sequenceNumber;
++
++}
++
++static void yaffs2_CheckpointDeviceToDevice(yaffs_Device *dev,
++ yaffs_CheckpointDevice *cp)
++{
++ dev->nErasedBlocks = cp->nErasedBlocks;
++ dev->allocationBlock = cp->allocationBlock;
++ dev->allocationPage = cp->allocationPage;
++ dev->nFreeChunks = cp->nFreeChunks;
++
++ dev->nDeletedFiles = cp->nDeletedFiles;
++ dev->nUnlinkedFiles = cp->nUnlinkedFiles;
++ dev->nBackgroundDeletions = cp->nBackgroundDeletions;
++ dev->sequenceNumber = cp->sequenceNumber;
++}
++
++
++static int yaffs2_WriteCheckpointDevice(yaffs_Device *dev)
++{
++ yaffs_CheckpointDevice cp;
++ __u32 nBytes;
++ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
++
++ int ok;
++
++ /* Write device runtime values*/
++ yaffs2_DeviceToCheckpointDevice(&cp, dev);
++ cp.structType = sizeof(cp);
++
++ ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++ /* Write block info */
++ if (ok) {
++ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
++ ok = (yaffs2_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
++ }
++
++ /* Write chunk bits */
++ if (ok) {
++ nBytes = nBlocks * dev->chunkBitmapStride;
++ ok = (yaffs2_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
++ }
++ return ok ? 1 : 0;
++
++}
++
++static int yaffs2_ReadCheckpointDevice(yaffs_Device *dev)
++{
++ yaffs_CheckpointDevice cp;
++ __u32 nBytes;
++ __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
++
++ int ok;
++
++ ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
++ if (!ok)
++ return 0;
++
++ if (cp.structType != sizeof(cp))
++ return 0;
++
++
++ yaffs2_CheckpointDeviceToDevice(dev, &cp);
++
++ nBytes = nBlocks * sizeof(yaffs_BlockInfo);
++
++ ok = (yaffs2_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
++
++ if (!ok)
++ return 0;
++ nBytes = nBlocks * dev->chunkBitmapStride;
++
++ ok = (yaffs2_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
++
++ return ok ? 1 : 0;
++}
++
++static void yaffs2_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
++ yaffs_Object *obj)
++{
++
++ cp->objectId = obj->objectId;
++ cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
++ cp->hdrChunk = obj->hdrChunk;
++ cp->variantType = obj->variantType;
++ cp->deleted = obj->deleted;
++ cp->softDeleted = obj->softDeleted;
++ cp->unlinked = obj->unlinked;
++ cp->fake = obj->fake;
++ cp->renameAllowed = obj->renameAllowed;
++ cp->unlinkAllowed = obj->unlinkAllowed;
++ cp->serial = obj->serial;
++ cp->nDataChunks = obj->nDataChunks;
++
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
++ cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
++ else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
++ cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
++}
++
++static int yaffs2_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
++{
++
++ yaffs_Object *parent;
++
++ if (obj->variantType != cp->variantType) {
++ T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
++ TCONT("chunk %d does not match existing object type %d")
++ TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
++ obj->variantType));
++ return 0;
++ }
++
++ obj->objectId = cp->objectId;
++
++ if (cp->parentId)
++ parent = yaffs_FindOrCreateObjectByNumber(
++ obj->myDev,
++ cp->parentId,
++ YAFFS_OBJECT_TYPE_DIRECTORY);
++ else
++ parent = NULL;
++
++ if (parent) {
++ if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
++ T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
++ TCONT(" chunk %d Parent type, %d, not directory")
++ TENDSTR),
++ cp->objectId, cp->parentId, cp->variantType,
++ cp->hdrChunk, parent->variantType));
++ return 0;
++ }
++ yaffs_AddObjectToDirectory(parent, obj);
++ }
++
++ obj->hdrChunk = cp->hdrChunk;
++ obj->variantType = cp->variantType;
++ obj->deleted = cp->deleted;
++ obj->softDeleted = cp->softDeleted;
++ obj->unlinked = cp->unlinked;
++ obj->fake = cp->fake;
++ obj->renameAllowed = cp->renameAllowed;
++ obj->unlinkAllowed = cp->unlinkAllowed;
++ obj->serial = cp->serial;
++ obj->nDataChunks = cp->nDataChunks;
++
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
++ obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
++ else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
++ obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
++
++ if (obj->hdrChunk > 0)
++ obj->lazyLoaded = 1;
++ return 1;
++}
++
++
++
++static int yaffs2_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
++ __u32 level, int chunkOffset)
++{
++ int i;
++ yaffs_Device *dev = in->myDev;
++ int ok = 1;
++
++ if (tn) {
++ if (level > 0) {
++
++ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
++ if (tn->internal[i]) {
++ ok = yaffs2_CheckpointTnodeWorker(in,
++ tn->internal[i],
++ level - 1,
++ (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
++ }
++ }
++ } else if (level == 0) {
++ __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
++ ok = (yaffs2_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
++ if (ok)
++ ok = (yaffs2_CheckpointWrite(dev, tn, dev->tnodeSize) == dev->tnodeSize);
++ }
++ }
++
++ return ok;
++
++}
++
++static int yaffs2_WriteCheckpointTnodes(yaffs_Object *obj)
++{
++ __u32 endMarker = ~0;
++ int ok = 1;
++
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
++ ok = yaffs2_CheckpointTnodeWorker(obj,
++ obj->variant.fileVariant.top,
++ obj->variant.fileVariant.topLevel,
++ 0);
++ if (ok)
++ ok = (yaffs2_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
++ sizeof(endMarker));
++ }
++
++ return ok ? 1 : 0;
++}
++
++static int yaffs2_ReadCheckpointTnodes(yaffs_Object *obj)
++{
++ __u32 baseChunk;
++ int ok = 1;
++ yaffs_Device *dev = obj->myDev;
++ yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
++ yaffs_Tnode *tn;
++ int nread = 0;
++
++ ok = (yaffs2_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++
++ while (ok && (~baseChunk)) {
++ nread++;
++ /* Read level 0 tnode */
++
++
++ tn = yaffs_GetTnode(dev);
++ if (tn){
++ ok = (yaffs2_CheckpointRead(dev, tn, dev->tnodeSize) == dev->tnodeSize);
++ } else
++ ok = 0;
++
++ if (tn && ok)
++ ok = yaffs_AddOrFindLevel0Tnode(dev,
++ fileStructPtr,
++ baseChunk,
++ tn) ? 1 : 0;
++
++ if (ok)
++ ok = (yaffs2_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
++
++ }
++
++ T(YAFFS_TRACE_CHECKPOINT, (
++ TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
++ nread, baseChunk, ok));
++
++ return ok ? 1 : 0;
++}
++
++
++static int yaffs2_WriteCheckpointObjects(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ yaffs_CheckpointObject cp;
++ int i;
++ int ok = 1;
++ struct ylist_head *lh;
++
++
++ /* Iterate through the objects in each hash entry,
++ * dumping them to the checkpointing stream.
++ */
++
++ for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
++ ylist_for_each(lh, &dev->objectBucket[i].list) {
++ if (lh) {
++ obj = ylist_entry(lh, yaffs_Object, hashLink);
++ if (!obj->deferedFree) {
++ yaffs2_ObjectToCheckpointObject(&cp, obj);
++ cp.structType = sizeof(cp);
++
++ T(YAFFS_TRACE_CHECKPOINT, (
++ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR),
++ cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, obj));
++
++ ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++ if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
++ ok = yaffs2_WriteCheckpointTnodes(obj);
++ }
++ }
++ }
++ }
++
++ /* Dump end of list */
++ memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
++ cp.structType = sizeof(cp);
++
++ if (ok)
++ ok = (yaffs2_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
++
++ return ok ? 1 : 0;
++}
++
++static int yaffs2_ReadCheckpointObjects(yaffs_Device *dev)
++{
++ yaffs_Object *obj;
++ yaffs_CheckpointObject cp;
++ int ok = 1;
++ int done = 0;
++ yaffs_Object *hardList = NULL;
++
++ while (ok && !done) {
++ ok = (yaffs2_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
++ if (cp.structType != sizeof(cp)) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
++ cp.structType, (int)sizeof(cp), ok));
++ ok = 0;
++ }
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
++ cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
++
++ if (ok && cp.objectId == ~0)
++ done = 1;
++ else if (ok) {
++ obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
++ if (obj) {
++ ok = yaffs2_CheckpointObjectToObject(obj, &cp);
++ if (!ok)
++ break;
++ if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
++ ok = yaffs2_ReadCheckpointTnodes(obj);
++ } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
++ obj->hardLinks.next =
++ (struct ylist_head *) hardList;
++ hardList = obj;
++ }
++ } else
++ ok = 0;
++ }
++ }
++
++ if (ok)
++ yaffs_HardlinkFixup(dev, hardList);
++
++ return ok ? 1 : 0;
++}
++
++static int yaffs2_WriteCheckpointSum(yaffs_Device *dev)
++{
++ __u32 checkpointSum;
++ int ok;
++
++ yaffs2_GetCheckpointSum(dev, &checkpointSum);
++
++ ok = (yaffs2_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
++
++ if (!ok)
++ return 0;
++
++ return 1;
++}
++
++static int yaffs2_ReadCheckpointSum(yaffs_Device *dev)
++{
++ __u32 checkpointSum0;
++ __u32 checkpointSum1;
++ int ok;
++
++ yaffs2_GetCheckpointSum(dev, &checkpointSum0);
++
++ ok = (yaffs2_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
++
++ if (!ok)
++ return 0;
++
++ if (checkpointSum0 != checkpointSum1)
++ return 0;
++
++ return 1;
++}
++
++
++static int yaffs2_WriteCheckpointData(yaffs_Device *dev)
++{
++ int ok = 1;
++
++ if (!yaffs2_CheckpointRequired(dev)) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
++ ok = 0;
++ }
++
++ if (ok)
++ ok = yaffs2_CheckpointOpen(dev, 1);
++
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
++ ok = yaffs2_WriteCheckpointValidityMarker(dev, 1);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
++ ok = yaffs2_WriteCheckpointDevice(dev);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
++ ok = yaffs2_WriteCheckpointObjects(dev);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
++ ok = yaffs2_WriteCheckpointValidityMarker(dev, 0);
++ }
++
++ if (ok)
++ ok = yaffs2_WriteCheckpointSum(dev);
++
++ if (!yaffs2_CheckpointClose(dev))
++ ok = 0;
++
++ if (ok)
++ dev->isCheckpointed = 1;
++ else
++ dev->isCheckpointed = 0;
++
++ return dev->isCheckpointed;
++}
++
++static int yaffs2_ReadCheckpointData(yaffs_Device *dev)
++{
++ int ok = 1;
++
++ if(!dev->param.isYaffs2)
++ ok = 0;
++
++ if (ok && dev->param.skipCheckpointRead) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
++ ok = 0;
++ }
++
++ if (ok)
++ ok = yaffs2_CheckpointOpen(dev, 0); /* open for read */
++
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
++ ok = yaffs2_ReadCheckpointValidityMarker(dev, 1);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
++ ok = yaffs2_ReadCheckpointDevice(dev);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
++ ok = yaffs2_ReadCheckpointObjects(dev);
++ }
++ if (ok) {
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
++ ok = yaffs2_ReadCheckpointValidityMarker(dev, 0);
++ }
++
++ if (ok) {
++ ok = yaffs2_ReadCheckpointSum(dev);
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
++ }
++
++ if (!yaffs2_CheckpointClose(dev))
++ ok = 0;
++
++ if (ok)
++ dev->isCheckpointed = 1;
++ else
++ dev->isCheckpointed = 0;
++
++ return ok ? 1 : 0;
++
++}
++
++void yaffs2_InvalidateCheckpoint(yaffs_Device *dev)
++{
++ if (dev->isCheckpointed ||
++ dev->blocksInCheckpoint > 0) {
++ dev->isCheckpointed = 0;
++ yaffs2_CheckpointInvalidateStream(dev);
++ }
++ if (dev->param.markSuperBlockDirty)
++ dev->param.markSuperBlockDirty(dev);
++}
++
++
++int yaffs_CheckpointSave(yaffs_Device *dev)
++{
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++
++ yaffs_VerifyObjects(dev);
++ yaffs_VerifyBlocks(dev);
++ yaffs_VerifyFreeChunks(dev);
++
++ if (!dev->isCheckpointed) {
++ yaffs2_InvalidateCheckpoint(dev);
++ yaffs2_WriteCheckpointData(dev);
++ }
++
++ T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++
++ return dev->isCheckpointed;
++}
++
++int yaffs2_CheckpointRestore(yaffs_Device *dev)
++{
++ int retval;
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++
++ retval = yaffs2_ReadCheckpointData(dev);
++
++ if (dev->isCheckpointed) {
++ yaffs_VerifyObjects(dev);
++ yaffs_VerifyBlocks(dev);
++ yaffs_VerifyFreeChunks(dev);
++ }
++
++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
++
++ return retval;
++}
++
++int yaffs2_HandleHole(yaffs_Object *obj, loff_t newSize)
++{
++ /* if newsSize > oldFileSize.
++ * We're going to be writing a hole.
++ * If the hole is small then write zeros otherwise write a start of hole marker.
++ */
++
++
++ loff_t oldFileSize;
++ int increase;
++ int smallHole ;
++ int result = YAFFS_OK;
++ yaffs_Device *dev = NULL;
++
++ __u8 *localBuffer = NULL;
++
++ int smallIncreaseOk = 0;
++
++ if(!obj)
++ return YAFFS_FAIL;
++
++ if(obj->variantType != YAFFS_OBJECT_TYPE_FILE)
++ return YAFFS_FAIL;
++
++ dev = obj->myDev;
++
++ /* Bail out if not yaffs2 mode */
++ if(!dev->param.isYaffs2)
++ return YAFFS_OK;
++
++ oldFileSize = obj->variant.fileVariant.fileSize;
++
++ if (newSize <= oldFileSize)
++ return YAFFS_OK;
++
++ increase = newSize - oldFileSize;
++
++ if(increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->nDataBytesPerChunk &&
++ yaffs_CheckSpaceForAllocation(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
++ smallHole = 1;
++ else
++ smallHole = 0;
++
++ if(smallHole)
++ localBuffer= yaffs_GetTempBuffer(dev, __LINE__);
++
++ if(localBuffer){
++ /* fill hole with zero bytes */
++ int pos = oldFileSize;
++ int thisWrite;
++ int written;
++ memset(localBuffer,0,dev->nDataBytesPerChunk);
++ smallIncreaseOk = 1;
++
++ while(increase > 0 && smallIncreaseOk){
++ thisWrite = increase;
++ if(thisWrite > dev->nDataBytesPerChunk)
++ thisWrite = dev->nDataBytesPerChunk;
++ written = yaffs_DoWriteDataToFile(obj,localBuffer,pos,thisWrite,0);
++ if(written == thisWrite){
++ pos += thisWrite;
++ increase -= thisWrite;
++ } else
++ smallIncreaseOk = 0;
++ }
++
++ yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
++
++ /* If we were out of space then reverse any chunks we've added */
++ if(!smallIncreaseOk)
++ yaffs_ResizeDown(obj, oldFileSize);
++ }
++
++ if (!smallIncreaseOk &&
++ obj->parent &&
++ obj->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
++ obj->parent->objectId != YAFFS_OBJECTID_DELETED){
++ /* Write a hole start header with the old file size */
++ yaffs_UpdateObjectHeader(obj, NULL, 0, 1, 0, NULL);
++ }
++
++ return result;
++
++}
++
++
++typedef struct {
++ int seq;
++ int block;
++} yaffs_BlockIndex;
++
++
++static int yaffs2_ybicmp(const void *a, const void *b)
++{
++ register int aseq = ((yaffs_BlockIndex *)a)->seq;
++ register int bseq = ((yaffs_BlockIndex *)b)->seq;
++ register int ablock = ((yaffs_BlockIndex *)a)->block;
++ register int bblock = ((yaffs_BlockIndex *)b)->block;
++ if (aseq == bseq)
++ return ablock - bblock;
++ else
++ return aseq - bseq;
++}
++
++int yaffs2_ScanBackwards(yaffs_Device *dev)
++{
++ yaffs_ExtendedTags tags;
++ int blk;
++ int blockIterator;
++ int startIterator;
++ int endIterator;
++ int nBlocksToScan = 0;
++
++ int chunk;
++ int result;
++ int c;
++ int deleted;
++ yaffs_BlockState state;
++ yaffs_Object *hardList = NULL;
++ yaffs_BlockInfo *bi;
++ __u32 sequenceNumber;
++ yaffs_ObjectHeader *oh;
++ yaffs_Object *in;
++ yaffs_Object *parent;
++ int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
++ int itsUnlinked;
++ __u8 *chunkData;
++
++ int fileSize;
++ int isShrink;
++ int foundChunksInBlock;
++ int equivalentObjectId;
++ int alloc_failed = 0;
++
++
++ yaffs_BlockIndex *blockIndex = NULL;
++ int altBlockIndex = 0;
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ ("yaffs2_ScanBackwards starts intstartblk %d intendblk %d..."
++ TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
++
++
++ dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
++
++ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
++
++ if (!blockIndex) {
++ blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
++ altBlockIndex = 1;
++ }
++
++ if (!blockIndex) {
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("yaffs2_ScanBackwards() could not allocate block index!" TENDSTR)));
++ return YAFFS_FAIL;
++ }
++
++ dev->blocksInCheckpoint = 0;
++
++ chunkData = yaffs_GetTempBuffer(dev, __LINE__);
++
++ /* Scan all the blocks to determine their state */
++ bi = dev->blockInfo;
++ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
++ yaffs_ClearChunkBits(dev, blk);
++ bi->pagesInUse = 0;
++ bi->softDeletions = 0;
++
++ yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
++
++ bi->blockState = state;
++ bi->sequenceNumber = sequenceNumber;
++
++ if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
++ bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
++ if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
++ bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
++
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
++ state, sequenceNumber));
++
++
++ if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
++ dev->blocksInCheckpoint++;
++
++ } else if (state == YAFFS_BLOCK_STATE_DEAD) {
++ T(YAFFS_TRACE_BAD_BLOCKS,
++ (TSTR("block %d is bad" TENDSTR), blk));
++ } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("Block empty " TENDSTR)));
++ dev->nErasedBlocks++;
++ dev->nFreeChunks += dev->param.nChunksPerBlock;
++ } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++
++ /* Determine the highest sequence number */
++ if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
++ sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
++
++ blockIndex[nBlocksToScan].seq = sequenceNumber;
++ blockIndex[nBlocksToScan].block = blk;
++
++ nBlocksToScan++;
++
++ if (sequenceNumber >= dev->sequenceNumber)
++ dev->sequenceNumber = sequenceNumber;
++ } else {
++ /* TODO: Nasty sequence number! */
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ ("Block scanning block %d has bad sequence number %d"
++ TENDSTR), blk, sequenceNumber));
++
++ }
++ }
++ bi++;
++ }
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
++
++
++
++ YYIELD();
++
++ /* Sort the blocks by sequence number*/
++ yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), yaffs2_ybicmp);
++
++ YYIELD();
++
++ T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
++
++ /* Now scan the blocks looking at the data. */
++ startIterator = 0;
++ endIterator = nBlocksToScan - 1;
++ T(YAFFS_TRACE_SCAN_DEBUG,
++ (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
++
++ /* For each block.... backwards */
++ for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
++ blockIterator--) {
++ /* Cooperative multitasking! This loop can run for so
++ long that watchdog timers expire. */
++ YYIELD();
++
++ /* get the block to scan in the correct order */
++ blk = blockIndex[blockIterator].block;
++
++ bi = yaffs_GetBlockInfo(dev, blk);
++
++
++ state = bi->blockState;
++
++ deleted = 0;
++
++ /* For each chunk in each block that needs scanning.... */
++ foundChunksInBlock = 0;
++ for (c = dev->param.nChunksPerBlock - 1;
++ !alloc_failed && c >= 0 &&
++ (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++ state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
++ /* Scan backwards...
++ * Read the tags and decide what to do
++ */
++
++ chunk = blk * dev->param.nChunksPerBlock + c;
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
++ &tags);
++
++ /* Let's have a good look at this chunk... */
++
++ if (!tags.chunkUsed) {
++ /* An unassigned chunk in the block.
++ * If there are used chunks after this one, then
++ * it is a chunk that was skipped due to failing the erased
++ * check. Just skip it so that it can be deleted.
++ * But, more typically, We get here when this is an unallocated
++ * chunk and his means that either the block is empty or
++ * this is the one being allocated from
++ */
++
++ if (foundChunksInBlock) {
++ /* This is a chunk that was skipped due to failing the erased check */
++ } else if (c == 0) {
++ /* We're looking at the first chunk in the block so the block is unused */
++ state = YAFFS_BLOCK_STATE_EMPTY;
++ dev->nErasedBlocks++;
++ } else {
++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
++ state == YAFFS_BLOCK_STATE_ALLOCATING) {
++ if (dev->sequenceNumber == bi->sequenceNumber) {
++ /* this is the block being allocated from */
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR
++ (" Allocating from %d %d"
++ TENDSTR), blk, c));
++
++ state = YAFFS_BLOCK_STATE_ALLOCATING;
++ dev->allocationBlock = blk;
++ dev->allocationPage = c;
++ dev->allocationBlockFinder = blk;
++ } else {
++ /* This is a partially written block that is not
++ * the current allocation block.
++ */
++
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("Partially written block %d detected" TENDSTR),
++ blk));
++ }
++ }
++ }
++
++ dev->nFreeChunks++;
++
++ } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
++ T(YAFFS_TRACE_SCAN,
++ (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
++ blk, c));
++
++ dev->nFreeChunks++;
++
++ } else if (tags.objectId > YAFFS_MAX_OBJECT_ID ||
++ tags.chunkId > YAFFS_MAX_CHUNK_ID ||
++ (tags.chunkId > 0 && tags.byteCount > dev->nDataBytesPerChunk) ||
++ tags.sequenceNumber != bi->sequenceNumber ) {
++ T(YAFFS_TRACE_SCAN,
++ (TSTR("Chunk (%d:%d) with bad tags:obj = %d, chunkId = %d, byteCount = %d, ignored"TENDSTR),
++ blk, c,tags.objectId, tags.chunkId, tags.byteCount));
++
++ dev->nFreeChunks++;
++
++ } else if (tags.chunkId > 0) {
++ /* chunkId > 0 so it is a data chunk... */
++ unsigned int endpos;
++ __u32 chunkBase =
++ (tags.chunkId - 1) * dev->nDataBytesPerChunk;
++
++ foundChunksInBlock = 1;
++
++
++ yaffs_SetChunkBit(dev, blk, c);
++ bi->pagesInUse++;
++
++ in = yaffs_FindOrCreateObjectByNumber(dev,
++ tags.
++ objectId,
++ YAFFS_OBJECT_TYPE_FILE);
++ if (!in) {
++ /* Out of memory */
++ alloc_failed = 1;
++ }
++
++ if (in &&
++ in->variantType == YAFFS_OBJECT_TYPE_FILE
++ && chunkBase < in->variant.fileVariant.shrinkSize) {
++ /* This has not been invalidated by a resize */
++ if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, -1)) {
++ alloc_failed = 1;
++ }
++
++ /* File size is calculated by looking at the data chunks if we have not
++ * seen an object header yet. Stop this practice once we find an object header.
++ */
++ endpos = chunkBase + tags.byteCount;
++
++ if (!in->valid && /* have not got an object header yet */
++ in->variant.fileVariant.scannedFileSize < endpos) {
++ in->variant.fileVariant.scannedFileSize = endpos;
++ in->variant.fileVariant.fileSize = endpos;
++ }
++
++ } else if (in) {
++ /* This chunk has been invalidated by a resize, or a past file deletion
++ * so delete the chunk*/
++ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++
++ }
++ } else {
++ /* chunkId == 0, so it is an ObjectHeader.
++ * Thus, we read in the object header and make the object
++ */
++ foundChunksInBlock = 1;
++
++ yaffs_SetChunkBit(dev, blk, c);
++ bi->pagesInUse++;
++
++ oh = NULL;
++ in = NULL;
++
++ if (tags.extraHeaderInfoAvailable) {
++ in = yaffs_FindOrCreateObjectByNumber(dev,
++ tags.objectId,
++ tags.extraObjectType);
++ if (!in)
++ alloc_failed = 1;
++ }
++
++ if (!in ||
++ (!in->valid && dev->param.disableLazyLoad) ||
++ tags.extraShadows ||
++ (!in->valid &&
++ (tags.objectId == YAFFS_OBJECTID_ROOT ||
++ tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
++
++ /* If we don't have valid info then we need to read the chunk
++ * TODO In future we can probably defer reading the chunk and
++ * living with invalid data until needed.
++ */
++
++ result = yaffs_ReadChunkWithTagsFromNAND(dev,
++ chunk,
++ chunkData,
++ NULL);
++
++ oh = (yaffs_ObjectHeader *) chunkData;
++
++ if (dev->param.inbandTags) {
++ /* Fix up the header if they got corrupted by inband tags */
++ oh->shadowsObject = oh->inbandShadowsObject;
++ oh->isShrink = oh->inbandIsShrink;
++ }
++
++ if (!in) {
++ in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
++ if (!in)
++ alloc_failed = 1;
++ }
++
++ }
++
++ if (!in) {
++ /* TODO Hoosterman we have a problem! */
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
++ TENDSTR), tags.objectId, chunk));
++ continue;
++ }
++
++ if (in->valid) {
++ /* We have already filled this one.
++ * We have a duplicate that will be discarded, but
++ * we first have to suck out resize info if it is a file.
++ */
++
++ if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
++ ((oh &&
++ oh->type == YAFFS_OBJECT_TYPE_FILE) ||
++ (tags.extraHeaderInfoAvailable &&
++ tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
++ __u32 thisSize =
++ (oh) ? oh->fileSize : tags.
++ extraFileLength;
++ __u32 parentObjectId =
++ (oh) ? oh->
++ parentObjectId : tags.
++ extraParentObjectId;
++
++
++ isShrink =
++ (oh) ? oh->isShrink : tags.
++ extraIsShrinkHeader;
++
++ /* If it is deleted (unlinked at start also means deleted)
++ * we treat the file size as being zeroed at this point.
++ */
++ if (parentObjectId ==
++ YAFFS_OBJECTID_DELETED
++ || parentObjectId ==
++ YAFFS_OBJECTID_UNLINKED) {
++ thisSize = 0;
++ isShrink = 1;
++ }
++
++ if (isShrink && in->variant.fileVariant.shrinkSize > thisSize)
++ in->variant.fileVariant.shrinkSize = thisSize;
++
++ if (isShrink)
++ bi->hasShrinkHeader = 1;
++
++ }
++ /* Use existing - destroy this one. */
++ yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
++
++ }
++
++ if (!in->valid && in->variantType !=
++ (oh ? oh->type : tags.extraObjectType))
++ T(YAFFS_TRACE_ERROR, (
++ TSTR("yaffs tragedy: Bad object type, "
++ TCONT("%d != %d, for object %d at chunk ")
++ TCONT("%d during scan")
++ TENDSTR), oh ?
++ oh->type : tags.extraObjectType,
++ in->variantType, tags.objectId,
++ chunk));
++
++ if (!in->valid &&
++ (tags.objectId == YAFFS_OBJECTID_ROOT ||
++ tags.objectId ==
++ YAFFS_OBJECTID_LOSTNFOUND)) {
++ /* We only load some info, don't fiddle with directory structure */
++ in->valid = 1;
++
++ if (oh) {
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++
++ in->lazyLoaded = 0;
++
++#endif
++ } else
++ in->lazyLoaded = 1;
++
++ in->hdrChunk = chunk;
++
++ } else if (!in->valid) {
++ /* we need to load this info */
++
++ in->valid = 1;
++ in->hdrChunk = chunk;
++
++ if (oh) {
++ in->variantType = oh->type;
++
++ in->yst_mode = oh->yst_mode;
++#ifdef CONFIG_YAFFS_WINCE
++ in->win_atime[0] = oh->win_atime[0];
++ in->win_ctime[0] = oh->win_ctime[0];
++ in->win_mtime[0] = oh->win_mtime[0];
++ in->win_atime[1] = oh->win_atime[1];
++ in->win_ctime[1] = oh->win_ctime[1];
++ in->win_mtime[1] = oh->win_mtime[1];
++#else
++ in->yst_uid = oh->yst_uid;
++ in->yst_gid = oh->yst_gid;
++ in->yst_atime = oh->yst_atime;
++ in->yst_mtime = oh->yst_mtime;
++ in->yst_ctime = oh->yst_ctime;
++ in->yst_rdev = oh->yst_rdev;
++#endif
++
++ if (oh->shadowsObject > 0)
++ yaffs_HandleShadowedObject(dev,
++ oh->
++ shadowsObject,
++ 1);
++
++
++
++ yaffs_SetObjectNameFromOH(in, oh);
++ parent =
++ yaffs_FindOrCreateObjectByNumber
++ (dev, oh->parentObjectId,
++ YAFFS_OBJECT_TYPE_DIRECTORY);
++
++ fileSize = oh->fileSize;
++ isShrink = oh->isShrink;
++ equivalentObjectId = oh->equivalentObjectId;
++
++ } else {
++ in->variantType = tags.extraObjectType;
++ parent =
++ yaffs_FindOrCreateObjectByNumber
++ (dev, tags.extraParentObjectId,
++ YAFFS_OBJECT_TYPE_DIRECTORY);
++ fileSize = tags.extraFileLength;
++ isShrink = tags.extraIsShrinkHeader;
++ equivalentObjectId = tags.extraEquivalentObjectId;
++ in->lazyLoaded = 1;
++
++ }
++ in->dirty = 0;
++
++ if (!parent)
++ alloc_failed = 1;
++
++ /* directory stuff...
++ * hook up to parent
++ */
++
++ if (parent && parent->variantType ==
++ YAFFS_OBJECT_TYPE_UNKNOWN) {
++ /* Set up as a directory */
++ parent->variantType =
++ YAFFS_OBJECT_TYPE_DIRECTORY;
++ YINIT_LIST_HEAD(&parent->variant.
++ directoryVariant.
++ children);
++ } else if (!parent || parent->variantType !=
++ YAFFS_OBJECT_TYPE_DIRECTORY) {
++ /* Hoosterman, another problem....
++ * We're trying to use a non-directory as a directory
++ */
++
++ T(YAFFS_TRACE_ERROR,
++ (TSTR
++ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
++ TENDSTR)));
++ parent = dev->lostNFoundDir;
++ }
++
++ yaffs_AddObjectToDirectory(parent, in);
++
++ itsUnlinked = (parent == dev->deletedDir) ||
++ (parent == dev->unlinkedDir);
++
++ if (isShrink) {
++ /* Mark the block as having a shrinkHeader */
++ bi->hasShrinkHeader = 1;
++ }
++
++ /* Note re hardlinks.
++ * Since we might scan a hardlink before its equivalent object is scanned
++ * we put them all in a list.
++ * After scanning is complete, we should have all the objects, so we run
++ * through this list and fix up all the chains.
++ */
++
++ switch (in->variantType) {
++ case YAFFS_OBJECT_TYPE_UNKNOWN:
++ /* Todo got a problem */
++ break;
++ case YAFFS_OBJECT_TYPE_FILE:
++
++ if (in->variant.fileVariant.
++ scannedFileSize < fileSize) {
++ /* This covers the case where the file size is greater
++ * than where the data is
++ * This will happen if the file is resized to be larger
++ * than its current data extents.
++ */
++ in->variant.fileVariant.fileSize = fileSize;
++ in->variant.fileVariant.scannedFileSize = fileSize;
++ }
++
++ if (in->variant.fileVariant.shrinkSize > fileSize)
++ in->variant.fileVariant.shrinkSize = fileSize;
++
++
++ break;
++ case YAFFS_OBJECT_TYPE_HARDLINK:
++ if (!itsUnlinked) {
++ in->variant.hardLinkVariant.equivalentObjectId =
++ equivalentObjectId;
++ in->hardLinks.next =
++ (struct ylist_head *) hardList;
++ hardList = in;
++ }
++ break;
++ case YAFFS_OBJECT_TYPE_DIRECTORY:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SPECIAL:
++ /* Do nothing */
++ break;
++ case YAFFS_OBJECT_TYPE_SYMLINK:
++ if (oh) {
++ in->variant.symLinkVariant.alias =
++ yaffs_CloneString(oh->alias);
++ if (!in->variant.symLinkVariant.alias)
++ alloc_failed = 1;
++ }
++ break;
++ }
++
++ }
++
++ }
++
++ } /* End of scanning for each chunk */
++
++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
++ /* If we got this far while scanning, then the block is fully allocated. */
++ state = YAFFS_BLOCK_STATE_FULL;
++ }
++
++
++ bi->blockState = state;
++
++ /* Now let's see if it was dirty */
++ if (bi->pagesInUse == 0 &&
++ !bi->hasShrinkHeader &&
++ bi->blockState == YAFFS_BLOCK_STATE_FULL) {
++ yaffs_BlockBecameDirty(dev, blk);
++ }
++
++ }
++
++ yaffs_SkipRestOfBlock(dev);
++
++ if (altBlockIndex)
++ YFREE_ALT(blockIndex);
++ else
++ YFREE(blockIndex);
++
++ /* Ok, we've done all the scanning.
++ * Fix up the hard link chains.
++ * We should now have scanned all the objects, now it's time to add these
++ * hardlinks.
++ */
++ yaffs_HardlinkFixup(dev, hardList);
++
++
++ yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
++
++ if (alloc_failed)
++ return YAFFS_FAIL;
++
++ T(YAFFS_TRACE_SCAN, (TSTR("yaffs2_ScanBackwards ends" TENDSTR)));
++
++ return YAFFS_OK;
++}
+diff -Nrup a/fs/yaffs2/yaffs_yaffs2.h b/fs/yaffs2/yaffs_yaffs2.h
+--- a/fs/yaffs2/yaffs_yaffs2.h 1970-01-01 02:00:00.000000000 +0200
++++ b/fs/yaffs2/yaffs_yaffs2.h 2010-10-03 18:03:47.552000367 +0300
+@@ -0,0 +1,36 @@
++/*
++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
++ *
++ * Copyright (C) 2002-2010 Aleph One Ltd.
++ * for Toby Churchill Ltd and Brightstar Engineering
++ *
++ * Created by Charles Manning <charles@aleph1.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#ifndef __YAFFS_YAFFS2_H__
++#define __YAFFS_YAFFS2_H__
++
++#include "yaffs_guts.h"
++
++void yaffs2_CalcOldestDirtySequence(yaffs_Device *dev);
++void yaffs2_FindOldestDirtySequence(yaffs_Device *dev);
++void yaffs2_ClearOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi);
++void yaffs2_UpdateOldestDirtySequence(yaffs_Device *dev, unsigned blockNo, yaffs_BlockInfo *bi);
++int yaffs2_BlockNotDisqualifiedFromGC(yaffs_Device *dev, yaffs_BlockInfo *bi);
++__u32 yaffs2_FindRefreshBlock(yaffs_Device *dev);
++int yaffs2_CheckpointRequired(yaffs_Device *dev);
++int yaffs2_CalcCheckpointBlocksRequired(yaffs_Device *dev);
++
++
++void yaffs2_InvalidateCheckpoint(yaffs_Device *dev);
++int yaffs2_CheckpointSave(yaffs_Device *dev);
++int yaffs2_CheckpointRestore(yaffs_Device *dev);
++
++int yaffs2_HandleHole(yaffs_Object *obj, loff_t newSize);
++int yaffs2_ScanBackwards(yaffs_Device *dev);
++
++#endif
+diff -Nrup a/fs/yaffs2/yportenv.h b/fs/yaffs2/yportenv.h
+--- a/fs/yaffs2/yportenv.h 2010-10-03 17:48:22.725000364 +0300
++++ b/fs/yaffs2/yportenv.h 2010-10-03 18:03:47.555000363 +0300
+@@ -1,7 +1,7 @@
+ /*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+- * Copyright (C) 2002-2007 Aleph One Ltd.
++ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+@@ -41,12 +41,14 @@
+ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19))
+ #include <linux/config.h>
+ #endif
++
+ #include <linux/kernel.h>
+ #include <linux/mm.h>
+ #include <linux/sched.h>
+ #include <linux/string.h>
+ #include <linux/slab.h>
+ #include <linux/vmalloc.h>
++#include <linux/xattr.h>
+
+ #define YCHAR char
+ #define YUCHAR unsigned char
+@@ -55,11 +57,11 @@
+ #define yaffs_strcpy(a, b) strcpy(a, b)
+ #define yaffs_strncpy(a, b, c) strncpy(a, b, c)
+ #define yaffs_strncmp(a, b, c) strncmp(a, b, c)
+-#define yaffs_strlen(s) strlen(s)
++#define yaffs_strnlen(s,m) strnlen(s,m)
+ #define yaffs_sprintf sprintf
+ #define yaffs_toupper(a) toupper(a)
+
+-#define Y_INLINE inline
++#define Y_INLINE __inline__
+
+ #define YAFFS_LOSTNFOUND_NAME "lost+found"
+ #define YAFFS_LOSTNFOUND_PREFIX "obj"
+@@ -71,11 +73,11 @@
+ #define YFREE_ALT(x) vfree(x)
+ #define YMALLOC_DMA(x) YMALLOC(x)
+
+-/* KR - added for use in scan so processes aren't blocked indefinitely. */
+ #define YYIELD() schedule()
++#define Y_DUMP_STACK() dump_stack()
+
+-#define YAFFS_ROOT_MODE 0666
+-#define YAFFS_LOSTNFOUND_MODE 0666
++#define YAFFS_ROOT_MODE 0755
++#define YAFFS_LOSTNFOUND_MODE 0700
+
+ #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
+ #define Y_CURRENT_TIME CURRENT_TIME.tv_sec
+@@ -89,15 +91,10 @@
+ #define yaffs_strcmp(a, b) strcmp(a, b)
+
+ #define TENDSTR "\n"
+-#define TSTR(x) KERN_WARNING x
++#define TSTR(x) KERN_DEBUG x
+ #define TCONT(x) x
+ #define TOUT(p) printk p
+
+-#define yaffs_trace(mask, fmt, args...) \
+- do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \
+- printk(KERN_WARNING "yaffs: " fmt, ## args); \
+- } while (0)
+-
+ #define compile_time_assertion(assertion) \
+ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; })
+
+@@ -116,7 +113,6 @@
+ #include "stdio.h"
+ #include "string.h"
+
+-#include "devextras.h"
+
+ #define YMALLOC(x) malloc(x)
+ #define YFREE(x) free(x)
+@@ -129,7 +125,7 @@
+ #define yaffs_strcat(a, b) strcat(a, b)
+ #define yaffs_strcpy(a, b) strcpy(a, b)
+ #define yaffs_strncpy(a, b, c) strncpy(a, b, c)
+-#define yaffs_strlen(s) strlen(s)
++#define yaffs_strnlen(s,m) strnlen(s,m)
+ #define yaffs_sprintf sprintf
+ #define yaffs_toupper(a) toupper(a)
+
+@@ -146,8 +142,8 @@
+ #define YAFFS_LOSTNFOUND_PREFIX "obj"
+ /* #define YPRINTF(x) printf x */
+
+-#define YAFFS_ROOT_MODE 0666
+-#define YAFFS_LOSTNFOUND_MODE 0666
++#define YAFFS_ROOT_MODE 0755
++#define YAFFS_LOSTNFOUND_MODE 0700
+
+ #define yaffs_SumCompare(x, y) ((x) == (y))
+ #define yaffs_strcmp(a, b) strcmp(a, b)
+@@ -158,46 +154,180 @@
+
+ #endif
+
+-/* see yaffs_fs.c */
+-extern unsigned int yaffs_traceMask;
+-extern unsigned int yaffs_wr_attempts;
++#if defined(CONFIG_YAFFS_DIRECT) || defined(CONFIG_YAFFS_WINCE)
+
+-/*
+- * Tracing flags.
+- * The flags masked in YAFFS_TRACE_ALWAYS are always traced.
+- */
++#ifdef CONFIG_YAFFSFS_PROVIDE_VALUES
++
++#ifndef O_RDONLY
++#define O_RDONLY 00
++#endif
++
++#ifndef O_WRONLY
++#define O_WRONLY 01
++#endif
++
++#ifndef O_RDWR
++#define O_RDWR 02
++#endif
++
++#ifndef O_CREAT
++#define O_CREAT 0100
++#endif
++
++#ifndef O_EXCL
++#define O_EXCL 0200
++#endif
++
++#ifndef O_TRUNC
++#define O_TRUNC 01000
++#endif
++
++#ifndef O_APPEND
++#define O_APPEND 02000
++#endif
++
++#ifndef SEEK_SET
++#define SEEK_SET 0
++#endif
++
++#ifndef SEEK_CUR
++#define SEEK_CUR 1
++#endif
++
++#ifndef SEEK_END
++#define SEEK_END 2
++#endif
++
++#ifndef EBUSY
++#define EBUSY 16
++#endif
++
++#ifndef ENODEV
++#define ENODEV 19
++#endif
++
++#ifndef EINVAL
++#define EINVAL 22
++#endif
++
++#ifndef EBADF
++#define EBADF 9
++#endif
++
++#ifndef EACCES
++#define EACCES 13
++#endif
++
++#ifndef EXDEV
++#define EXDEV 18
++#endif
++
++#ifndef ENOENT
++#define ENOENT 2
++#endif
++
++#ifndef ENOSPC
++#define ENOSPC 28
++#endif
++
++#ifndef ERANGE
++#define ERANGE 34
++#endif
++
++#ifndef ENODATA
++#define ENODATA 61
++#endif
++
++#ifndef ENOTEMPTY
++#define ENOTEMPTY 39
++#endif
++
++#ifndef ENAMETOOLONG
++#define ENAMETOOLONG 36
++#endif
++
++#ifndef ENOMEM
++#define ENOMEM 12
++#endif
++
++#ifndef EEXIST
++#define EEXIST 17
++#endif
++
++#ifndef ENOTDIR
++#define ENOTDIR 20
++#endif
++
++#ifndef EISDIR
++#define EISDIR 21
++#endif
++
++
++// Mode flags
++
++#ifndef S_IFMT
++#define S_IFMT 0170000
++#endif
++
++#ifndef S_IFLNK
++#define S_IFLNK 0120000
++#endif
+
+-#define YAFFS_TRACE_OS 0x00000002
+-#define YAFFS_TRACE_ALLOCATE 0x00000004
+-#define YAFFS_TRACE_SCAN 0x00000008
+-#define YAFFS_TRACE_BAD_BLOCKS 0x00000010
+-#define YAFFS_TRACE_ERASE 0x00000020
+-#define YAFFS_TRACE_GC 0x00000040
+-#define YAFFS_TRACE_WRITE 0x00000080
+-#define YAFFS_TRACE_TRACING 0x00000100
+-#define YAFFS_TRACE_DELETION 0x00000200
+-#define YAFFS_TRACE_BUFFERS 0x00000400
+-#define YAFFS_TRACE_NANDACCESS 0x00000800
+-#define YAFFS_TRACE_GC_DETAIL 0x00001000
+-#define YAFFS_TRACE_SCAN_DEBUG 0x00002000
+-#define YAFFS_TRACE_MTD 0x00004000
+-#define YAFFS_TRACE_CHECKPOINT 0x00008000
+-
+-#define YAFFS_TRACE_VERIFY 0x00010000
+-#define YAFFS_TRACE_VERIFY_NAND 0x00020000
+-#define YAFFS_TRACE_VERIFY_FULL 0x00040000
+-#define YAFFS_TRACE_VERIFY_ALL 0x000F0000
+-
+-
+-#define YAFFS_TRACE_ERROR 0x40000000
+-#define YAFFS_TRACE_BUG 0x80000000
+-#define YAFFS_TRACE_ALWAYS 0xF0000000
++#ifndef S_IFDIR
++#define S_IFDIR 0040000
++#endif
++
++#ifndef S_IFREG
++#define S_IFREG 0100000
++#endif
+
++#ifndef S_IREAD
++#define S_IREAD 0000400
++#endif
++
++#ifndef S_IWRITE
++#define S_IWRITE 0000200
++#endif
+
+-#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0)
++#ifndef S_IEXEC
++#define S_IEXEC 0000100
++#endif
++
++#ifndef XATTR_CREATE
++#define XATTR_CREATE 1
++#endif
++
++#ifndef XATTR_REPLACE
++#define XATTR_REPLACE 2
++#endif
++
++#ifndef R_OK
++#define R_OK 4
++#define W_OK 2
++#define X_OK 1
++#define F_OK 0
++#endif
++
++#else
++#include <errno.h>
++#include <sys/stat.h>
++#include <fcntl.h>
++#endif
++
++#endif
++
++#ifndef Y_DUMP_STACK
++#define Y_DUMP_STACK() do { } while (0)
++#endif
+
+ #ifndef YBUG
+-#define YBUG() do {T(YAFFS_TRACE_BUG, (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR), __LINE__)); } while (0)
++#define YBUG() do {\
++ T(YAFFS_TRACE_BUG,\
++ (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),\
++ __LINE__));\
++ Y_DUMP_STACK();\
++} while (0)
+ #endif
+
++
+ #endif
projects / openwrt / staging / robimarko.git / commitdiff