source "drivers/thunderbolt/Kconfig"
+source "drivers/android/Kconfig"
+
endmenu
obj-$(CONFIG_MCB) += mcb/
obj-$(CONFIG_RAS) += ras/
obj-$(CONFIG_THUNDERBOLT) += thunderbolt/
+obj-$(CONFIG_ANDROID) += android/
--- /dev/null
+menu "Android"
+
+config ANDROID
+ bool "Android Drivers"
+ ---help---
+ Enable support for various drivers needed on the Android platform
+
+if ANDROID
+
+config ANDROID_BINDER_IPC
+ bool "Android Binder IPC Driver"
+ depends on MMU
+ default n
+ ---help---
+ Binder is used in Android for both communication between processes,
+ and remote method invocation.
+
+ This means one Android process can call a method/routine in another
+ Android process, using Binder to identify, invoke and pass arguments
+ between said processes.
+
+config ANDROID_BINDER_IPC_32BIT
+ bool
+ depends on !64BIT && ANDROID_BINDER_IPC
+ default y
+ ---help---
+ The Binder API has been changed to support both 32 and 64bit
+ applications in a mixed environment.
+
+ Enable this to support an old 32-bit Android user-space (v4.4 and
+ earlier).
+
+ Note that enabling this will break newer Android user-space.
+
+endif # if ANDROID
+
+endmenu
--- /dev/null
+ccflags-y += -I$(src) # needed for trace events
+
+obj-$(CONFIG_ANDROID_BINDER_IPC) += binder.o
--- /dev/null
+/* binder.c
+ *
+ * Android IPC Subsystem
+ *
+ * Copyright (C) 2007-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <asm/cacheflush.h>
+#include <linux/fdtable.h>
+#include <linux/file.h>
+#include <linux/freezer.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/nsproxy.h>
+#include <linux/poll.h>
+#include <linux/debugfs.h>
+#include <linux/rbtree.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/pid_namespace.h>
+
+#include "binder.h"
+#include "binder_trace.h"
+
+static DEFINE_MUTEX(binder_main_lock);
+static DEFINE_MUTEX(binder_deferred_lock);
+static DEFINE_MUTEX(binder_mmap_lock);
+
+static HLIST_HEAD(binder_procs);
+static HLIST_HEAD(binder_deferred_list);
+static HLIST_HEAD(binder_dead_nodes);
+
+static struct dentry *binder_debugfs_dir_entry_root;
+static struct dentry *binder_debugfs_dir_entry_proc;
+static struct binder_node *binder_context_mgr_node;
+static kuid_t binder_context_mgr_uid = INVALID_UID;
+static int binder_last_id;
+static struct workqueue_struct *binder_deferred_workqueue;
+
+#define BINDER_DEBUG_ENTRY(name) \
+static int binder_##name##_open(struct inode *inode, struct file *file) \
+{ \
+ return single_open(file, binder_##name##_show, inode->i_private); \
+} \
+\
+static const struct file_operations binder_##name##_fops = { \
+ .owner = THIS_MODULE, \
+ .open = binder_##name##_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+}
+
+static int binder_proc_show(struct seq_file *m, void *unused);
+BINDER_DEBUG_ENTRY(proc);
+
+/* This is only defined in include/asm-arm/sizes.h */
+#ifndef SZ_1K
+#define SZ_1K 0x400
+#endif
+
+#ifndef SZ_4M
+#define SZ_4M 0x400000
+#endif
+
+#define FORBIDDEN_MMAP_FLAGS (VM_WRITE)
+
+#define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64)
+
+enum {
+ BINDER_DEBUG_USER_ERROR = 1U << 0,
+ BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1,
+ BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2,
+ BINDER_DEBUG_OPEN_CLOSE = 1U << 3,
+ BINDER_DEBUG_DEAD_BINDER = 1U << 4,
+ BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5,
+ BINDER_DEBUG_READ_WRITE = 1U << 6,
+ BINDER_DEBUG_USER_REFS = 1U << 7,
+ BINDER_DEBUG_THREADS = 1U << 8,
+ BINDER_DEBUG_TRANSACTION = 1U << 9,
+ BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10,
+ BINDER_DEBUG_FREE_BUFFER = 1U << 11,
+ BINDER_DEBUG_INTERNAL_REFS = 1U << 12,
+ BINDER_DEBUG_BUFFER_ALLOC = 1U << 13,
+ BINDER_DEBUG_PRIORITY_CAP = 1U << 14,
+ BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15,
+};
+static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
+ BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
+module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
+
+static bool binder_debug_no_lock;
+module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
+
+static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
+static int binder_stop_on_user_error;
+
+static int binder_set_stop_on_user_error(const char *val,
+ struct kernel_param *kp)
+{
+ int ret;
+
+ ret = param_set_int(val, kp);
+ if (binder_stop_on_user_error < 2)
+ wake_up(&binder_user_error_wait);
+ return ret;
+}
+module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
+ param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO);
+
+#define binder_debug(mask, x...) \
+ do { \
+ if (binder_debug_mask & mask) \
+ pr_info(x); \
+ } while (0)
+
+#define binder_user_error(x...) \
+ do { \
+ if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
+ pr_info(x); \
+ if (binder_stop_on_user_error) \
+ binder_stop_on_user_error = 2; \
+ } while (0)
+
+enum binder_stat_types {
+ BINDER_STAT_PROC,
+ BINDER_STAT_THREAD,
+ BINDER_STAT_NODE,
+ BINDER_STAT_REF,
+ BINDER_STAT_DEATH,
+ BINDER_STAT_TRANSACTION,
+ BINDER_STAT_TRANSACTION_COMPLETE,
+ BINDER_STAT_COUNT
+};
+
+struct binder_stats {
+ int br[_IOC_NR(BR_FAILED_REPLY) + 1];
+ int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
+ int obj_created[BINDER_STAT_COUNT];
+ int obj_deleted[BINDER_STAT_COUNT];
+};
+
+static struct binder_stats binder_stats;
+
+static inline void binder_stats_deleted(enum binder_stat_types type)
+{
+ binder_stats.obj_deleted[type]++;
+}
+
+static inline void binder_stats_created(enum binder_stat_types type)
+{
+ binder_stats.obj_created[type]++;
+}
+
+struct binder_transaction_log_entry {
+ int debug_id;
+ int call_type;
+ int from_proc;
+ int from_thread;
+ int target_handle;
+ int to_proc;
+ int to_thread;
+ int to_node;
+ int data_size;
+ int offsets_size;
+};
+struct binder_transaction_log {
+ int next;
+ int full;
+ struct binder_transaction_log_entry entry[32];
+};
+static struct binder_transaction_log binder_transaction_log;
+static struct binder_transaction_log binder_transaction_log_failed;
+
+static struct binder_transaction_log_entry *binder_transaction_log_add(
+ struct binder_transaction_log *log)
+{
+ struct binder_transaction_log_entry *e;
+
+ e = &log->entry[log->next];
+ memset(e, 0, sizeof(*e));
+ log->next++;
+ if (log->next == ARRAY_SIZE(log->entry)) {
+ log->next = 0;
+ log->full = 1;
+ }
+ return e;
+}
+
+struct binder_work {
+ struct list_head entry;
+ enum {
+ BINDER_WORK_TRANSACTION = 1,
+ BINDER_WORK_TRANSACTION_COMPLETE,
+ BINDER_WORK_NODE,
+ BINDER_WORK_DEAD_BINDER,
+ BINDER_WORK_DEAD_BINDER_AND_CLEAR,
+ BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
+ } type;
+};
+
+struct binder_node {
+ int debug_id;
+ struct binder_work work;
+ union {
+ struct rb_node rb_node;
+ struct hlist_node dead_node;
+ };
+ struct binder_proc *proc;
+ struct hlist_head refs;
+ int internal_strong_refs;
+ int local_weak_refs;
+ int local_strong_refs;
+ binder_uintptr_t ptr;
+ binder_uintptr_t cookie;
+ unsigned has_strong_ref:1;
+ unsigned pending_strong_ref:1;
+ unsigned has_weak_ref:1;
+ unsigned pending_weak_ref:1;
+ unsigned has_async_transaction:1;
+ unsigned accept_fds:1;
+ unsigned min_priority:8;
+ struct list_head async_todo;
+};
+
+struct binder_ref_death {
+ struct binder_work work;
+ binder_uintptr_t cookie;
+};
+
+struct binder_ref {
+ /* Lookups needed: */
+ /* node + proc => ref (transaction) */
+ /* desc + proc => ref (transaction, inc/dec ref) */
+ /* node => refs + procs (proc exit) */
+ int debug_id;
+ struct rb_node rb_node_desc;
+ struct rb_node rb_node_node;
+ struct hlist_node node_entry;
+ struct binder_proc *proc;
+ struct binder_node *node;
+ uint32_t desc;
+ int strong;
+ int weak;
+ struct binder_ref_death *death;
+};
+
+struct binder_buffer {
+ struct list_head entry; /* free and allocated entries by address */
+ struct rb_node rb_node; /* free entry by size or allocated entry */
+ /* by address */
+ unsigned free:1;
+ unsigned allow_user_free:1;
+ unsigned async_transaction:1;
+ unsigned debug_id:29;
+
+ struct binder_transaction *transaction;
+
+ struct binder_node *target_node;
+ size_t data_size;
+ size_t offsets_size;
+ uint8_t data[0];
+};
+
+enum binder_deferred_state {
+ BINDER_DEFERRED_PUT_FILES = 0x01,
+ BINDER_DEFERRED_FLUSH = 0x02,
+ BINDER_DEFERRED_RELEASE = 0x04,
+};
+
+struct binder_proc {
+ struct hlist_node proc_node;
+ struct rb_root threads;
+ struct rb_root nodes;
+ struct rb_root refs_by_desc;
+ struct rb_root refs_by_node;
+ int pid;
+ struct vm_area_struct *vma;
+ struct mm_struct *vma_vm_mm;
+ struct task_struct *tsk;
+ struct files_struct *files;
+ struct hlist_node deferred_work_node;
+ int deferred_work;
+ void *buffer;
+ ptrdiff_t user_buffer_offset;
+
+ struct list_head buffers;
+ struct rb_root free_buffers;
+ struct rb_root allocated_buffers;
+ size_t free_async_space;
+
+ struct page **pages;
+ size_t buffer_size;
+ uint32_t buffer_free;
+ struct list_head todo;
+ wait_queue_head_t wait;
+ struct binder_stats stats;
+ struct list_head delivered_death;
+ int max_threads;
+ int requested_threads;
+ int requested_threads_started;
+ int ready_threads;
+ long default_priority;
+ struct dentry *debugfs_entry;
+};
+
+enum {
+ BINDER_LOOPER_STATE_REGISTERED = 0x01,
+ BINDER_LOOPER_STATE_ENTERED = 0x02,
+ BINDER_LOOPER_STATE_EXITED = 0x04,
+ BINDER_LOOPER_STATE_INVALID = 0x08,
+ BINDER_LOOPER_STATE_WAITING = 0x10,
+ BINDER_LOOPER_STATE_NEED_RETURN = 0x20
+};
+
+struct binder_thread {
+ struct binder_proc *proc;
+ struct rb_node rb_node;
+ int pid;
+ int looper;
+ struct binder_transaction *transaction_stack;
+ struct list_head todo;
+ uint32_t return_error; /* Write failed, return error code in read buf */
+ uint32_t return_error2; /* Write failed, return error code in read */
+ /* buffer. Used when sending a reply to a dead process that */
+ /* we are also waiting on */
+ wait_queue_head_t wait;
+ struct binder_stats stats;
+};
+
+struct binder_transaction {
+ int debug_id;
+ struct binder_work work;
+ struct binder_thread *from;
+ struct binder_transaction *from_parent;
+ struct binder_proc *to_proc;
+ struct binder_thread *to_thread;
+ struct binder_transaction *to_parent;
+ unsigned need_reply:1;
+ /* unsigned is_dead:1; */ /* not used at the moment */
+
+ struct binder_buffer *buffer;
+ unsigned int code;
+ unsigned int flags;
+ long priority;
+ long saved_priority;
+ kuid_t sender_euid;
+};
+
+static void
+binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
+
+static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
+{
+ struct files_struct *files = proc->files;
+ unsigned long rlim_cur;
+ unsigned long irqs;
+
+ if (files == NULL)
+ return -ESRCH;
+
+ if (!lock_task_sighand(proc->tsk, &irqs))
+ return -EMFILE;
+
+ rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE);
+ unlock_task_sighand(proc->tsk, &irqs);
+
+ return __alloc_fd(files, 0, rlim_cur, flags);
+}
+
+/*
+ * copied from fd_install
+ */
+static void task_fd_install(
+ struct binder_proc *proc, unsigned int fd, struct file *file)
+{
+ if (proc->files)
+ __fd_install(proc->files, fd, file);
+}
+
+/*
+ * copied from sys_close
+ */
+static long task_close_fd(struct binder_proc *proc, unsigned int fd)
+{
+ int retval;
+
+ if (proc->files == NULL)
+ return -ESRCH;
+
+ retval = __close_fd(proc->files, fd);
+ /* can't restart close syscall because file table entry was cleared */
+ if (unlikely(retval == -ERESTARTSYS ||
+ retval == -ERESTARTNOINTR ||
+ retval == -ERESTARTNOHAND ||
+ retval == -ERESTART_RESTARTBLOCK))
+ retval = -EINTR;
+
+ return retval;
+}
+
+static inline void binder_lock(const char *tag)
+{
+ trace_binder_lock(tag);
+ mutex_lock(&binder_main_lock);
+ trace_binder_locked(tag);
+}
+
+static inline void binder_unlock(const char *tag)
+{
+ trace_binder_unlock(tag);
+ mutex_unlock(&binder_main_lock);
+}
+
+static void binder_set_nice(long nice)
+{
+ long min_nice;
+
+ if (can_nice(current, nice)) {
+ set_user_nice(current, nice);
+ return;
+ }
+ min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur);
+ binder_debug(BINDER_DEBUG_PRIORITY_CAP,
+ "%d: nice value %ld not allowed use %ld instead\n",
+ current->pid, nice, min_nice);
+ set_user_nice(current, min_nice);
+ if (min_nice <= MAX_NICE)
+ return;
+ binder_user_error("%d RLIMIT_NICE not set\n", current->pid);
+}
+
+static size_t binder_buffer_size(struct binder_proc *proc,
+ struct binder_buffer *buffer)
+{
+ if (list_is_last(&buffer->entry, &proc->buffers))
+ return proc->buffer + proc->buffer_size - (void *)buffer->data;
+ return (size_t)list_entry(buffer->entry.next,
+ struct binder_buffer, entry) - (size_t)buffer->data;
+}
+
+static void binder_insert_free_buffer(struct binder_proc *proc,
+ struct binder_buffer *new_buffer)
+{
+ struct rb_node **p = &proc->free_buffers.rb_node;
+ struct rb_node *parent = NULL;
+ struct binder_buffer *buffer;
+ size_t buffer_size;
+ size_t new_buffer_size;
+
+ BUG_ON(!new_buffer->free);
+
+ new_buffer_size = binder_buffer_size(proc, new_buffer);
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: add free buffer, size %zd, at %p\n",
+ proc->pid, new_buffer_size, new_buffer);
+
+ while (*p) {
+ parent = *p;
+ buffer = rb_entry(parent, struct binder_buffer, rb_node);
+ BUG_ON(!buffer->free);
+
+ buffer_size = binder_buffer_size(proc, buffer);
+
+ if (new_buffer_size < buffer_size)
+ p = &parent->rb_left;
+ else
+ p = &parent->rb_right;
+ }
+ rb_link_node(&new_buffer->rb_node, parent, p);
+ rb_insert_color(&new_buffer->rb_node, &proc->free_buffers);
+}
+
+static void binder_insert_allocated_buffer(struct binder_proc *proc,
+ struct binder_buffer *new_buffer)
+{
+ struct rb_node **p = &proc->allocated_buffers.rb_node;
+ struct rb_node *parent = NULL;
+ struct binder_buffer *buffer;
+
+ BUG_ON(new_buffer->free);
+
+ while (*p) {
+ parent = *p;
+ buffer = rb_entry(parent, struct binder_buffer, rb_node);
+ BUG_ON(buffer->free);
+
+ if (new_buffer < buffer)
+ p = &parent->rb_left;
+ else if (new_buffer > buffer)
+ p = &parent->rb_right;
+ else
+ BUG();
+ }
+ rb_link_node(&new_buffer->rb_node, parent, p);
+ rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers);
+}
+
+static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc,
+ uintptr_t user_ptr)
+{
+ struct rb_node *n = proc->allocated_buffers.rb_node;
+ struct binder_buffer *buffer;
+ struct binder_buffer *kern_ptr;
+
+ kern_ptr = (struct binder_buffer *)(user_ptr - proc->user_buffer_offset
+ - offsetof(struct binder_buffer, data));
+
+ while (n) {
+ buffer = rb_entry(n, struct binder_buffer, rb_node);
+ BUG_ON(buffer->free);
+
+ if (kern_ptr < buffer)
+ n = n->rb_left;
+ else if (kern_ptr > buffer)
+ n = n->rb_right;
+ else
+ return buffer;
+ }
+ return NULL;
+}
+
+static int binder_update_page_range(struct binder_proc *proc, int allocate,
+ void *start, void *end,
+ struct vm_area_struct *vma)
+{
+ void *page_addr;
+ unsigned long user_page_addr;
+ struct vm_struct tmp_area;
+ struct page **page;
+ struct mm_struct *mm;
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: %s pages %p-%p\n", proc->pid,
+ allocate ? "allocate" : "free", start, end);
+
+ if (end <= start)
+ return 0;
+
+ trace_binder_update_page_range(proc, allocate, start, end);
+
+ if (vma)
+ mm = NULL;
+ else
+ mm = get_task_mm(proc->tsk);
+
+ if (mm) {
+ down_write(&mm->mmap_sem);
+ vma = proc->vma;
+ if (vma && mm != proc->vma_vm_mm) {
+ pr_err("%d: vma mm and task mm mismatch\n",
+ proc->pid);
+ vma = NULL;
+ }
+ }
+
+ if (allocate == 0)
+ goto free_range;
+
+ if (vma == NULL) {
+ pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n",
+ proc->pid);
+ goto err_no_vma;
+ }
+
+ for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
+ int ret;
+
+ page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
+
+ BUG_ON(*page);
+ *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
+ if (*page == NULL) {
+ pr_err("%d: binder_alloc_buf failed for page at %p\n",
+ proc->pid, page_addr);
+ goto err_alloc_page_failed;
+ }
+ tmp_area.addr = page_addr;
+ tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */;
+ ret = map_vm_area(&tmp_area, PAGE_KERNEL, page);
+ if (ret) {
+ pr_err("%d: binder_alloc_buf failed to map page at %p in kernel\n",
+ proc->pid, page_addr);
+ goto err_map_kernel_failed;
+ }
+ user_page_addr =
+ (uintptr_t)page_addr + proc->user_buffer_offset;
+ ret = vm_insert_page(vma, user_page_addr, page[0]);
+ if (ret) {
+ pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
+ proc->pid, user_page_addr);
+ goto err_vm_insert_page_failed;
+ }
+ /* vm_insert_page does not seem to increment the refcount */
+ }
+ if (mm) {
+ up_write(&mm->mmap_sem);
+ mmput(mm);
+ }
+ return 0;
+
+free_range:
+ for (page_addr = end - PAGE_SIZE; page_addr >= start;
+ page_addr -= PAGE_SIZE) {
+ page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
+ if (vma)
+ zap_page_range(vma, (uintptr_t)page_addr +
+ proc->user_buffer_offset, PAGE_SIZE, NULL);
+err_vm_insert_page_failed:
+ unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
+err_map_kernel_failed:
+ __free_page(*page);
+ *page = NULL;
+err_alloc_page_failed:
+ ;
+ }
+err_no_vma:
+ if (mm) {
+ up_write(&mm->mmap_sem);
+ mmput(mm);
+ }
+ return -ENOMEM;
+}
+
+static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
+ size_t data_size,
+ size_t offsets_size, int is_async)
+{
+ struct rb_node *n = proc->free_buffers.rb_node;
+ struct binder_buffer *buffer;
+ size_t buffer_size;
+ struct rb_node *best_fit = NULL;
+ void *has_page_addr;
+ void *end_page_addr;
+ size_t size;
+
+ if (proc->vma == NULL) {
+ pr_err("%d: binder_alloc_buf, no vma\n",
+ proc->pid);
+ return NULL;
+ }
+
+ size = ALIGN(data_size, sizeof(void *)) +
+ ALIGN(offsets_size, sizeof(void *));
+
+ if (size < data_size || size < offsets_size) {
+ binder_user_error("%d: got transaction with invalid size %zd-%zd\n",
+ proc->pid, data_size, offsets_size);
+ return NULL;
+ }
+
+ if (is_async &&
+ proc->free_async_space < size + sizeof(struct binder_buffer)) {
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: binder_alloc_buf size %zd failed, no async space left\n",
+ proc->pid, size);
+ return NULL;
+ }
+
+ while (n) {
+ buffer = rb_entry(n, struct binder_buffer, rb_node);
+ BUG_ON(!buffer->free);
+ buffer_size = binder_buffer_size(proc, buffer);
+
+ if (size < buffer_size) {
+ best_fit = n;
+ n = n->rb_left;
+ } else if (size > buffer_size)
+ n = n->rb_right;
+ else {
+ best_fit = n;
+ break;
+ }
+ }
+ if (best_fit == NULL) {
+ pr_err("%d: binder_alloc_buf size %zd failed, no address space\n",
+ proc->pid, size);
+ return NULL;
+ }
+ if (n == NULL) {
+ buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
+ buffer_size = binder_buffer_size(proc, buffer);
+ }
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: binder_alloc_buf size %zd got buffer %p size %zd\n",
+ proc->pid, size, buffer, buffer_size);
+
+ has_page_addr =
+ (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK);
+ if (n == NULL) {
+ if (size + sizeof(struct binder_buffer) + 4 >= buffer_size)
+ buffer_size = size; /* no room for other buffers */
+ else
+ buffer_size = size + sizeof(struct binder_buffer);
+ }
+ end_page_addr =
+ (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size);
+ if (end_page_addr > has_page_addr)
+ end_page_addr = has_page_addr;
+ if (binder_update_page_range(proc, 1,
+ (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL))
+ return NULL;
+
+ rb_erase(best_fit, &proc->free_buffers);
+ buffer->free = 0;
+ binder_insert_allocated_buffer(proc, buffer);
+ if (buffer_size != size) {
+ struct binder_buffer *new_buffer = (void *)buffer->data + size;
+
+ list_add(&new_buffer->entry, &buffer->entry);
+ new_buffer->free = 1;
+ binder_insert_free_buffer(proc, new_buffer);
+ }
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: binder_alloc_buf size %zd got %p\n",
+ proc->pid, size, buffer);
+ buffer->data_size = data_size;
+ buffer->offsets_size = offsets_size;
+ buffer->async_transaction = is_async;
+ if (is_async) {
+ proc->free_async_space -= size + sizeof(struct binder_buffer);
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
+ "%d: binder_alloc_buf size %zd async free %zd\n",
+ proc->pid, size, proc->free_async_space);
+ }
+
+ return buffer;
+}
+
+static void *buffer_start_page(struct binder_buffer *buffer)
+{
+ return (void *)((uintptr_t)buffer & PAGE_MASK);
+}
+
+static void *buffer_end_page(struct binder_buffer *buffer)
+{
+ return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK);
+}
+
+static void binder_delete_free_buffer(struct binder_proc *proc,
+ struct binder_buffer *buffer)
+{
+ struct binder_buffer *prev, *next = NULL;
+ int free_page_end = 1;
+ int free_page_start = 1;
+
+ BUG_ON(proc->buffers.next == &buffer->entry);
+ prev = list_entry(buffer->entry.prev, struct binder_buffer, entry);
+ BUG_ON(!prev->free);
+ if (buffer_end_page(prev) == buffer_start_page(buffer)) {
+ free_page_start = 0;
+ if (buffer_end_page(prev) == buffer_end_page(buffer))
+ free_page_end = 0;
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: merge free, buffer %p share page with %p\n",
+ proc->pid, buffer, prev);
+ }
+
+ if (!list_is_last(&buffer->entry, &proc->buffers)) {
+ next = list_entry(buffer->entry.next,
+ struct binder_buffer, entry);
+ if (buffer_start_page(next) == buffer_end_page(buffer)) {
+ free_page_end = 0;
+ if (buffer_start_page(next) ==
+ buffer_start_page(buffer))
+ free_page_start = 0;
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: merge free, buffer %p share page with %p\n",
+ proc->pid, buffer, prev);
+ }
+ }
+ list_del(&buffer->entry);
+ if (free_page_start || free_page_end) {
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: merge free, buffer %p do not share page%s%s with %p or %p\n",
+ proc->pid, buffer, free_page_start ? "" : " end",
+ free_page_end ? "" : " start", prev, next);
+ binder_update_page_range(proc, 0, free_page_start ?
+ buffer_start_page(buffer) : buffer_end_page(buffer),
+ (free_page_end ? buffer_end_page(buffer) :
+ buffer_start_page(buffer)) + PAGE_SIZE, NULL);
+ }
+}
+
+static void binder_free_buf(struct binder_proc *proc,
+ struct binder_buffer *buffer)
+{
+ size_t size, buffer_size;
+
+ buffer_size = binder_buffer_size(proc, buffer);
+
+ size = ALIGN(buffer->data_size, sizeof(void *)) +
+ ALIGN(buffer->offsets_size, sizeof(void *));
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%d: binder_free_buf %p size %zd buffer_size %zd\n",
+ proc->pid, buffer, size, buffer_size);
+
+ BUG_ON(buffer->free);
+ BUG_ON(size > buffer_size);
+ BUG_ON(buffer->transaction != NULL);
+ BUG_ON((void *)buffer < proc->buffer);
+ BUG_ON((void *)buffer > proc->buffer + proc->buffer_size);
+
+ if (buffer->async_transaction) {
+ proc->free_async_space += size + sizeof(struct binder_buffer);
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
+ "%d: binder_free_buf size %zd async free %zd\n",
+ proc->pid, size, proc->free_async_space);
+ }
+
+ binder_update_page_range(proc, 0,
+ (void *)PAGE_ALIGN((uintptr_t)buffer->data),
+ (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK),
+ NULL);
+ rb_erase(&buffer->rb_node, &proc->allocated_buffers);
+ buffer->free = 1;
+ if (!list_is_last(&buffer->entry, &proc->buffers)) {
+ struct binder_buffer *next = list_entry(buffer->entry.next,
+ struct binder_buffer, entry);
+
+ if (next->free) {
+ rb_erase(&next->rb_node, &proc->free_buffers);
+ binder_delete_free_buffer(proc, next);
+ }
+ }
+ if (proc->buffers.next != &buffer->entry) {
+ struct binder_buffer *prev = list_entry(buffer->entry.prev,
+ struct binder_buffer, entry);
+
+ if (prev->free) {
+ binder_delete_free_buffer(proc, buffer);
+ rb_erase(&prev->rb_node, &proc->free_buffers);
+ buffer = prev;
+ }
+ }
+ binder_insert_free_buffer(proc, buffer);
+}
+
+static struct binder_node *binder_get_node(struct binder_proc *proc,
+ binder_uintptr_t ptr)
+{
+ struct rb_node *n = proc->nodes.rb_node;
+ struct binder_node *node;
+
+ while (n) {
+ node = rb_entry(n, struct binder_node, rb_node);
+
+ if (ptr < node->ptr)
+ n = n->rb_left;
+ else if (ptr > node->ptr)
+ n = n->rb_right;
+ else
+ return node;
+ }
+ return NULL;
+}
+
+static struct binder_node *binder_new_node(struct binder_proc *proc,
+ binder_uintptr_t ptr,
+ binder_uintptr_t cookie)
+{
+ struct rb_node **p = &proc->nodes.rb_node;
+ struct rb_node *parent = NULL;
+ struct binder_node *node;
+
+ while (*p) {
+ parent = *p;
+ node = rb_entry(parent, struct binder_node, rb_node);
+
+ if (ptr < node->ptr)
+ p = &(*p)->rb_left;
+ else if (ptr > node->ptr)
+ p = &(*p)->rb_right;
+ else
+ return NULL;
+ }
+
+ node = kzalloc(sizeof(*node), GFP_KERNEL);
+ if (node == NULL)
+ return NULL;
+ binder_stats_created(BINDER_STAT_NODE);
+ rb_link_node(&node->rb_node, parent, p);
+ rb_insert_color(&node->rb_node, &proc->nodes);
+ node->debug_id = ++binder_last_id;
+ node->proc = proc;
+ node->ptr = ptr;
+ node->cookie = cookie;
+ node->work.type = BINDER_WORK_NODE;
+ INIT_LIST_HEAD(&node->work.entry);
+ INIT_LIST_HEAD(&node->async_todo);
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "%d:%d node %d u%016llx c%016llx created\n",
+ proc->pid, current->pid, node->debug_id,
+ (u64)node->ptr, (u64)node->cookie);
+ return node;
+}
+
+static int binder_inc_node(struct binder_node *node, int strong, int internal,
+ struct list_head *target_list)
+{
+ if (strong) {
+ if (internal) {
+ if (target_list == NULL &&
+ node->internal_strong_refs == 0 &&
+ !(node == binder_context_mgr_node &&
+ node->has_strong_ref)) {
+ pr_err("invalid inc strong node for %d\n",
+ node->debug_id);
+ return -EINVAL;
+ }
+ node->internal_strong_refs++;
+ } else
+ node->local_strong_refs++;
+ if (!node->has_strong_ref && target_list) {
+ list_del_init(&node->work.entry);
+ list_add_tail(&node->work.entry, target_list);
+ }
+ } else {
+ if (!internal)
+ node->local_weak_refs++;
+ if (!node->has_weak_ref && list_empty(&node->work.entry)) {
+ if (target_list == NULL) {
+ pr_err("invalid inc weak node for %d\n",
+ node->debug_id);
+ return -EINVAL;
+ }
+ list_add_tail(&node->work.entry, target_list);
+ }
+ }
+ return 0;
+}
+
+static int binder_dec_node(struct binder_node *node, int strong, int internal)
+{
+ if (strong) {
+ if (internal)
+ node->internal_strong_refs--;
+ else
+ node->local_strong_refs--;
+ if (node->local_strong_refs || node->internal_strong_refs)
+ return 0;
+ } else {
+ if (!internal)
+ node->local_weak_refs--;
+ if (node->local_weak_refs || !hlist_empty(&node->refs))
+ return 0;
+ }
+ if (node->proc && (node->has_strong_ref || node->has_weak_ref)) {
+ if (list_empty(&node->work.entry)) {
+ list_add_tail(&node->work.entry, &node->proc->todo);
+ wake_up_interruptible(&node->proc->wait);
+ }
+ } else {
+ if (hlist_empty(&node->refs) && !node->local_strong_refs &&
+ !node->local_weak_refs) {
+ list_del_init(&node->work.entry);
+ if (node->proc) {
+ rb_erase(&node->rb_node, &node->proc->nodes);
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "refless node %d deleted\n",
+ node->debug_id);
+ } else {
+ hlist_del(&node->dead_node);
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "dead node %d deleted\n",
+ node->debug_id);
+ }
+ kfree(node);
+ binder_stats_deleted(BINDER_STAT_NODE);
+ }
+ }
+
+ return 0;
+}
+
+
+static struct binder_ref *binder_get_ref(struct binder_proc *proc,
+ uint32_t desc)
+{
+ struct rb_node *n = proc->refs_by_desc.rb_node;
+ struct binder_ref *ref;
+
+ while (n) {
+ ref = rb_entry(n, struct binder_ref, rb_node_desc);
+
+ if (desc < ref->desc)
+ n = n->rb_left;
+ else if (desc > ref->desc)
+ n = n->rb_right;
+ else
+ return ref;
+ }
+ return NULL;
+}
+
+static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc,
+ struct binder_node *node)
+{
+ struct rb_node *n;
+ struct rb_node **p = &proc->refs_by_node.rb_node;
+ struct rb_node *parent = NULL;
+ struct binder_ref *ref, *new_ref;
+
+ while (*p) {
+ parent = *p;
+ ref = rb_entry(parent, struct binder_ref, rb_node_node);
+
+ if (node < ref->node)
+ p = &(*p)->rb_left;
+ else if (node > ref->node)
+ p = &(*p)->rb_right;
+ else
+ return ref;
+ }
+ new_ref = kzalloc(sizeof(*ref), GFP_KERNEL);
+ if (new_ref == NULL)
+ return NULL;
+ binder_stats_created(BINDER_STAT_REF);
+ new_ref->debug_id = ++binder_last_id;
+ new_ref->proc = proc;
+ new_ref->node = node;
+ rb_link_node(&new_ref->rb_node_node, parent, p);
+ rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
+
+ new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1;
+ for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
+ ref = rb_entry(n, struct binder_ref, rb_node_desc);
+ if (ref->desc > new_ref->desc)
+ break;
+ new_ref->desc = ref->desc + 1;
+ }
+
+ p = &proc->refs_by_desc.rb_node;
+ while (*p) {
+ parent = *p;
+ ref = rb_entry(parent, struct binder_ref, rb_node_desc);
+
+ if (new_ref->desc < ref->desc)
+ p = &(*p)->rb_left;
+ else if (new_ref->desc > ref->desc)
+ p = &(*p)->rb_right;
+ else
+ BUG();
+ }
+ rb_link_node(&new_ref->rb_node_desc, parent, p);
+ rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc);
+ if (node) {
+ hlist_add_head(&new_ref->node_entry, &node->refs);
+
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "%d new ref %d desc %d for node %d\n",
+ proc->pid, new_ref->debug_id, new_ref->desc,
+ node->debug_id);
+ } else {
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "%d new ref %d desc %d for dead node\n",
+ proc->pid, new_ref->debug_id, new_ref->desc);
+ }
+ return new_ref;
+}
+
+static void binder_delete_ref(struct binder_ref *ref)
+{
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "%d delete ref %d desc %d for node %d\n",
+ ref->proc->pid, ref->debug_id, ref->desc,
+ ref->node->debug_id);
+
+ rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc);
+ rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node);
+ if (ref->strong)
+ binder_dec_node(ref->node, 1, 1);
+ hlist_del(&ref->node_entry);
+ binder_dec_node(ref->node, 0, 1);
+ if (ref->death) {
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "%d delete ref %d desc %d has death notification\n",
+ ref->proc->pid, ref->debug_id, ref->desc);
+ list_del(&ref->death->work.entry);
+ kfree(ref->death);
+ binder_stats_deleted(BINDER_STAT_DEATH);
+ }
+ kfree(ref);
+ binder_stats_deleted(BINDER_STAT_REF);
+}
+
+static int binder_inc_ref(struct binder_ref *ref, int strong,
+ struct list_head *target_list)
+{
+ int ret;
+
+ if (strong) {
+ if (ref->strong == 0) {
+ ret = binder_inc_node(ref->node, 1, 1, target_list);
+ if (ret)
+ return ret;
+ }
+ ref->strong++;
+ } else {
+ if (ref->weak == 0) {
+ ret = binder_inc_node(ref->node, 0, 1, target_list);
+ if (ret)
+ return ret;
+ }
+ ref->weak++;
+ }
+ return 0;
+}
+
+
+static int binder_dec_ref(struct binder_ref *ref, int strong)
+{
+ if (strong) {
+ if (ref->strong == 0) {
+ binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n",
+ ref->proc->pid, ref->debug_id,
+ ref->desc, ref->strong, ref->weak);
+ return -EINVAL;
+ }
+ ref->strong--;
+ if (ref->strong == 0) {
+ int ret;
+
+ ret = binder_dec_node(ref->node, strong, 1);
+ if (ret)
+ return ret;
+ }
+ } else {
+ if (ref->weak == 0) {
+ binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n",
+ ref->proc->pid, ref->debug_id,
+ ref->desc, ref->strong, ref->weak);
+ return -EINVAL;
+ }
+ ref->weak--;
+ }
+ if (ref->strong == 0 && ref->weak == 0)
+ binder_delete_ref(ref);
+ return 0;
+}
+
+static void binder_pop_transaction(struct binder_thread *target_thread,
+ struct binder_transaction *t)
+{
+ if (target_thread) {
+ BUG_ON(target_thread->transaction_stack != t);
+ BUG_ON(target_thread->transaction_stack->from != target_thread);
+ target_thread->transaction_stack =
+ target_thread->transaction_stack->from_parent;
+ t->from = NULL;
+ }
+ t->need_reply = 0;
+ if (t->buffer)
+ t->buffer->transaction = NULL;
+ kfree(t);
+ binder_stats_deleted(BINDER_STAT_TRANSACTION);
+}
+
+static void binder_send_failed_reply(struct binder_transaction *t,
+ uint32_t error_code)
+{
+ struct binder_thread *target_thread;
+ struct binder_transaction *next;
+
+ BUG_ON(t->flags & TF_ONE_WAY);
+ while (1) {
+ target_thread = t->from;
+ if (target_thread) {
+ if (target_thread->return_error != BR_OK &&
+ target_thread->return_error2 == BR_OK) {
+ target_thread->return_error2 =
+ target_thread->return_error;
+ target_thread->return_error = BR_OK;
+ }
+ if (target_thread->return_error == BR_OK) {
+ binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
+ "send failed reply for transaction %d to %d:%d\n",
+ t->debug_id,
+ target_thread->proc->pid,
+ target_thread->pid);
+
+ binder_pop_transaction(target_thread, t);
+ target_thread->return_error = error_code;
+ wake_up_interruptible(&target_thread->wait);
+ } else {
+ pr_err("reply failed, target thread, %d:%d, has error code %d already\n",
+ target_thread->proc->pid,
+ target_thread->pid,
+ target_thread->return_error);
+ }
+ return;
+ }
+ next = t->from_parent;
+
+ binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
+ "send failed reply for transaction %d, target dead\n",
+ t->debug_id);
+
+ binder_pop_transaction(target_thread, t);
+ if (next == NULL) {
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "reply failed, no target thread at root\n");
+ return;
+ }
+ t = next;
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "reply failed, no target thread -- retry %d\n",
+ t->debug_id);
+ }
+}
+
+static void binder_transaction_buffer_release(struct binder_proc *proc,
+ struct binder_buffer *buffer,
+ binder_size_t *failed_at)
+{
+ binder_size_t *offp, *off_end;
+ int debug_id = buffer->debug_id;
+
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ "%d buffer release %d, size %zd-%zd, failed at %p\n",
+ proc->pid, buffer->debug_id,
+ buffer->data_size, buffer->offsets_size, failed_at);
+
+ if (buffer->target_node)
+ binder_dec_node(buffer->target_node, 1, 0);
+
+ offp = (binder_size_t *)(buffer->data +
+ ALIGN(buffer->data_size, sizeof(void *)));
+ if (failed_at)
+ off_end = failed_at;
+ else
+ off_end = (void *)offp + buffer->offsets_size;
+ for (; offp < off_end; offp++) {
+ struct flat_binder_object *fp;
+
+ if (*offp > buffer->data_size - sizeof(*fp) ||
+ buffer->data_size < sizeof(*fp) ||
+ !IS_ALIGNED(*offp, sizeof(u32))) {
+ pr_err("transaction release %d bad offset %lld, size %zd\n",
+ debug_id, (u64)*offp, buffer->data_size);
+ continue;
+ }
+ fp = (struct flat_binder_object *)(buffer->data + *offp);
+ switch (fp->type) {
+ case BINDER_TYPE_BINDER:
+ case BINDER_TYPE_WEAK_BINDER: {
+ struct binder_node *node = binder_get_node(proc, fp->binder);
+
+ if (node == NULL) {
+ pr_err("transaction release %d bad node %016llx\n",
+ debug_id, (u64)fp->binder);
+ break;
+ }
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " node %d u%016llx\n",
+ node->debug_id, (u64)node->ptr);
+ binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
+ } break;
+ case BINDER_TYPE_HANDLE:
+ case BINDER_TYPE_WEAK_HANDLE: {
+ struct binder_ref *ref = binder_get_ref(proc, fp->handle);
+
+ if (ref == NULL) {
+ pr_err("transaction release %d bad handle %d\n",
+ debug_id, fp->handle);
+ break;
+ }
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " ref %d desc %d (node %d)\n",
+ ref->debug_id, ref->desc, ref->node->debug_id);
+ binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE);
+ } break;
+
+ case BINDER_TYPE_FD:
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " fd %d\n", fp->handle);
+ if (failed_at)
+ task_close_fd(proc, fp->handle);
+ break;
+
+ default:
+ pr_err("transaction release %d bad object type %x\n",
+ debug_id, fp->type);
+ break;
+ }
+ }
+}
+
+static void binder_transaction(struct binder_proc *proc,
+ struct binder_thread *thread,
+ struct binder_transaction_data *tr, int reply)
+{
+ struct binder_transaction *t;
+ struct binder_work *tcomplete;
+ binder_size_t *offp, *off_end;
+ struct binder_proc *target_proc;
+ struct binder_thread *target_thread = NULL;
+ struct binder_node *target_node = NULL;
+ struct list_head *target_list;
+ wait_queue_head_t *target_wait;
+ struct binder_transaction *in_reply_to = NULL;
+ struct binder_transaction_log_entry *e;
+ uint32_t return_error;
+
+ e = binder_transaction_log_add(&binder_transaction_log);
+ e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
+ e->from_proc = proc->pid;
+ e->from_thread = thread->pid;
+ e->target_handle = tr->target.handle;
+ e->data_size = tr->data_size;
+ e->offsets_size = tr->offsets_size;
+
+ if (reply) {
+ in_reply_to = thread->transaction_stack;
+ if (in_reply_to == NULL) {
+ binder_user_error("%d:%d got reply transaction with no transaction stack\n",
+ proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_empty_call_stack;
+ }
+ binder_set_nice(in_reply_to->saved_priority);
+ if (in_reply_to->to_thread != thread) {
+ binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n",
+ proc->pid, thread->pid, in_reply_to->debug_id,
+ in_reply_to->to_proc ?
+ in_reply_to->to_proc->pid : 0,
+ in_reply_to->to_thread ?
+ in_reply_to->to_thread->pid : 0);
+ return_error = BR_FAILED_REPLY;
+ in_reply_to = NULL;
+ goto err_bad_call_stack;
+ }
+ thread->transaction_stack = in_reply_to->to_parent;
+ target_thread = in_reply_to->from;
+ if (target_thread == NULL) {
+ return_error = BR_DEAD_REPLY;
+ goto err_dead_binder;
+ }
+ if (target_thread->transaction_stack != in_reply_to) {
+ binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n",
+ proc->pid, thread->pid,
+ target_thread->transaction_stack ?
+ target_thread->transaction_stack->debug_id : 0,
+ in_reply_to->debug_id);
+ return_error = BR_FAILED_REPLY;
+ in_reply_to = NULL;
+ target_thread = NULL;
+ goto err_dead_binder;
+ }
+ target_proc = target_thread->proc;
+ } else {
+ if (tr->target.handle) {
+ struct binder_ref *ref;
+
+ ref = binder_get_ref(proc, tr->target.handle);
+ if (ref == NULL) {
+ binder_user_error("%d:%d got transaction to invalid handle\n",
+ proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_invalid_target_handle;
+ }
+ target_node = ref->node;
+ } else {
+ target_node = binder_context_mgr_node;
+ if (target_node == NULL) {
+ return_error = BR_DEAD_REPLY;
+ goto err_no_context_mgr_node;
+ }
+ }
+ e->to_node = target_node->debug_id;
+ target_proc = target_node->proc;
+ if (target_proc == NULL) {
+ return_error = BR_DEAD_REPLY;
+ goto err_dead_binder;
+ }
+ if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) {
+ struct binder_transaction *tmp;
+
+ tmp = thread->transaction_stack;
+ if (tmp->to_thread != thread) {
+ binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n",
+ proc->pid, thread->pid, tmp->debug_id,
+ tmp->to_proc ? tmp->to_proc->pid : 0,
+ tmp->to_thread ?
+ tmp->to_thread->pid : 0);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_call_stack;
+ }
+ while (tmp) {
+ if (tmp->from && tmp->from->proc == target_proc)
+ target_thread = tmp->from;
+ tmp = tmp->from_parent;
+ }
+ }
+ }
+ if (target_thread) {
+ e->to_thread = target_thread->pid;
+ target_list = &target_thread->todo;
+ target_wait = &target_thread->wait;
+ } else {
+ target_list = &target_proc->todo;
+ target_wait = &target_proc->wait;
+ }
+ e->to_proc = target_proc->pid;
+
+ /* TODO: reuse incoming transaction for reply */
+ t = kzalloc(sizeof(*t), GFP_KERNEL);
+ if (t == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_alloc_t_failed;
+ }
+ binder_stats_created(BINDER_STAT_TRANSACTION);
+
+ tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
+ if (tcomplete == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_alloc_tcomplete_failed;
+ }
+ binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE);
+
+ t->debug_id = ++binder_last_id;
+ e->debug_id = t->debug_id;
+
+ if (reply)
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld\n",
+ proc->pid, thread->pid, t->debug_id,
+ target_proc->pid, target_thread->pid,
+ (u64)tr->data.ptr.buffer,
+ (u64)tr->data.ptr.offsets,
+ (u64)tr->data_size, (u64)tr->offsets_size);
+ else
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld\n",
+ proc->pid, thread->pid, t->debug_id,
+ target_proc->pid, target_node->debug_id,
+ (u64)tr->data.ptr.buffer,
+ (u64)tr->data.ptr.offsets,
+ (u64)tr->data_size, (u64)tr->offsets_size);
+
+ if (!reply && !(tr->flags & TF_ONE_WAY))
+ t->from = thread;
+ else
+ t->from = NULL;
+ t->sender_euid = task_euid(proc->tsk);
+ t->to_proc = target_proc;
+ t->to_thread = target_thread;
+ t->code = tr->code;
+ t->flags = tr->flags;
+ t->priority = task_nice(current);
+
+ trace_binder_transaction(reply, t, target_node);
+
+ t->buffer = binder_alloc_buf(target_proc, tr->data_size,
+ tr->offsets_size, !reply && (t->flags & TF_ONE_WAY));
+ if (t->buffer == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_alloc_buf_failed;
+ }
+ t->buffer->allow_user_free = 0;
+ t->buffer->debug_id = t->debug_id;
+ t->buffer->transaction = t;
+ t->buffer->target_node = target_node;
+ trace_binder_transaction_alloc_buf(t->buffer);
+ if (target_node)
+ binder_inc_node(target_node, 1, 0, NULL);
+
+ offp = (binder_size_t *)(t->buffer->data +
+ ALIGN(tr->data_size, sizeof(void *)));
+
+ if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t)
+ tr->data.ptr.buffer, tr->data_size)) {
+ binder_user_error("%d:%d got transaction with invalid data ptr\n",
+ proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_copy_data_failed;
+ }
+ if (copy_from_user(offp, (const void __user *)(uintptr_t)
+ tr->data.ptr.offsets, tr->offsets_size)) {
+ binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
+ proc->pid, thread->pid);
+ return_error = BR_FAILED_REPLY;
+ goto err_copy_data_failed;
+ }
+ if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) {
+ binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n",
+ proc->pid, thread->pid, (u64)tr->offsets_size);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_offset;
+ }
+ off_end = (void *)offp + tr->offsets_size;
+ for (; offp < off_end; offp++) {
+ struct flat_binder_object *fp;
+
+ if (*offp > t->buffer->data_size - sizeof(*fp) ||
+ t->buffer->data_size < sizeof(*fp) ||
+ !IS_ALIGNED(*offp, sizeof(u32))) {
+ binder_user_error("%d:%d got transaction with invalid offset, %lld\n",
+ proc->pid, thread->pid, (u64)*offp);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_offset;
+ }
+ fp = (struct flat_binder_object *)(t->buffer->data + *offp);
+ switch (fp->type) {
+ case BINDER_TYPE_BINDER:
+ case BINDER_TYPE_WEAK_BINDER: {
+ struct binder_ref *ref;
+ struct binder_node *node = binder_get_node(proc, fp->binder);
+
+ if (node == NULL) {
+ node = binder_new_node(proc, fp->binder, fp->cookie);
+ if (node == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_new_node_failed;
+ }
+ node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
+ node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
+ }
+ if (fp->cookie != node->cookie) {
+ binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
+ proc->pid, thread->pid,
+ (u64)fp->binder, node->debug_id,
+ (u64)fp->cookie, (u64)node->cookie);
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_get_ref_for_node_failed;
+ }
+ ref = binder_get_ref_for_node(target_proc, node);
+ if (ref == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_get_ref_for_node_failed;
+ }
+ if (fp->type == BINDER_TYPE_BINDER)
+ fp->type = BINDER_TYPE_HANDLE;
+ else
+ fp->type = BINDER_TYPE_WEAK_HANDLE;
+ fp->handle = ref->desc;
+ binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE,
+ &thread->todo);
+
+ trace_binder_transaction_node_to_ref(t, node, ref);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " node %d u%016llx -> ref %d desc %d\n",
+ node->debug_id, (u64)node->ptr,
+ ref->debug_id, ref->desc);
+ } break;
+ case BINDER_TYPE_HANDLE:
+ case BINDER_TYPE_WEAK_HANDLE: {
+ struct binder_ref *ref = binder_get_ref(proc, fp->handle);
+
+ if (ref == NULL) {
+ binder_user_error("%d:%d got transaction with invalid handle, %d\n",
+ proc->pid,
+ thread->pid, fp->handle);
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_get_ref_failed;
+ }
+ if (ref->node->proc == target_proc) {
+ if (fp->type == BINDER_TYPE_HANDLE)
+ fp->type = BINDER_TYPE_BINDER;
+ else
+ fp->type = BINDER_TYPE_WEAK_BINDER;
+ fp->binder = ref->node->ptr;
+ fp->cookie = ref->node->cookie;
+ binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL);
+ trace_binder_transaction_ref_to_node(t, ref);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " ref %d desc %d -> node %d u%016llx\n",
+ ref->debug_id, ref->desc, ref->node->debug_id,
+ (u64)ref->node->ptr);
+ } else {
+ struct binder_ref *new_ref;
+
+ new_ref = binder_get_ref_for_node(target_proc, ref->node);
+ if (new_ref == NULL) {
+ return_error = BR_FAILED_REPLY;
+ goto err_binder_get_ref_for_node_failed;
+ }
+ fp->handle = new_ref->desc;
+ binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
+ trace_binder_transaction_ref_to_ref(t, ref,
+ new_ref);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " ref %d desc %d -> ref %d desc %d (node %d)\n",
+ ref->debug_id, ref->desc, new_ref->debug_id,
+ new_ref->desc, ref->node->debug_id);
+ }
+ } break;
+
+ case BINDER_TYPE_FD: {
+ int target_fd;
+ struct file *file;
+
+ if (reply) {
+ if (!(in_reply_to->flags & TF_ACCEPT_FDS)) {
+ binder_user_error("%d:%d got reply with fd, %d, but target does not allow fds\n",
+ proc->pid, thread->pid, fp->handle);
+ return_error = BR_FAILED_REPLY;
+ goto err_fd_not_allowed;
+ }
+ } else if (!target_node->accept_fds) {
+ binder_user_error("%d:%d got transaction with fd, %d, but target does not allow fds\n",
+ proc->pid, thread->pid, fp->handle);
+ return_error = BR_FAILED_REPLY;
+ goto err_fd_not_allowed;
+ }
+
+ file = fget(fp->handle);
+ if (file == NULL) {
+ binder_user_error("%d:%d got transaction with invalid fd, %d\n",
+ proc->pid, thread->pid, fp->handle);
+ return_error = BR_FAILED_REPLY;
+ goto err_fget_failed;
+ }
+ target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC);
+ if (target_fd < 0) {
+ fput(file);
+ return_error = BR_FAILED_REPLY;
+ goto err_get_unused_fd_failed;
+ }
+ task_fd_install(target_proc, target_fd, file);
+ trace_binder_transaction_fd(t, fp->handle, target_fd);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " fd %d -> %d\n", fp->handle, target_fd);
+ /* TODO: fput? */
+ fp->handle = target_fd;
+ } break;
+
+ default:
+ binder_user_error("%d:%d got transaction with invalid object type, %x\n",
+ proc->pid, thread->pid, fp->type);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_object_type;
+ }
+ }
+ if (reply) {
+ BUG_ON(t->buffer->async_transaction != 0);
+ binder_pop_transaction(target_thread, in_reply_to);
+ } else if (!(t->flags & TF_ONE_WAY)) {
+ BUG_ON(t->buffer->async_transaction != 0);
+ t->need_reply = 1;
+ t->from_parent = thread->transaction_stack;
+ thread->transaction_stack = t;
+ } else {
+ BUG_ON(target_node == NULL);
+ BUG_ON(t->buffer->async_transaction != 1);
+ if (target_node->has_async_transaction) {
+ target_list = &target_node->async_todo;
+ target_wait = NULL;
+ } else
+ target_node->has_async_transaction = 1;
+ }
+ t->work.type = BINDER_WORK_TRANSACTION;
+ list_add_tail(&t->work.entry, target_list);
+ tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE;
+ list_add_tail(&tcomplete->entry, &thread->todo);
+ if (target_wait)
+ wake_up_interruptible(target_wait);
+ return;
+
+err_get_unused_fd_failed:
+err_fget_failed:
+err_fd_not_allowed:
+err_binder_get_ref_for_node_failed:
+err_binder_get_ref_failed:
+err_binder_new_node_failed:
+err_bad_object_type:
+err_bad_offset:
+err_copy_data_failed:
+ trace_binder_transaction_failed_buffer_release(t->buffer);
+ binder_transaction_buffer_release(target_proc, t->buffer, offp);
+ t->buffer->transaction = NULL;
+ binder_free_buf(target_proc, t->buffer);
+err_binder_alloc_buf_failed:
+ kfree(tcomplete);
+ binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
+err_alloc_tcomplete_failed:
+ kfree(t);
+ binder_stats_deleted(BINDER_STAT_TRANSACTION);
+err_alloc_t_failed:
+err_bad_call_stack:
+err_empty_call_stack:
+err_dead_binder:
+err_invalid_target_handle:
+err_no_context_mgr_node:
+ binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
+ "%d:%d transaction failed %d, size %lld-%lld\n",
+ proc->pid, thread->pid, return_error,
+ (u64)tr->data_size, (u64)tr->offsets_size);
+
+ {
+ struct binder_transaction_log_entry *fe;
+
+ fe = binder_transaction_log_add(&binder_transaction_log_failed);
+ *fe = *e;
+ }
+
+ BUG_ON(thread->return_error != BR_OK);
+ if (in_reply_to) {
+ thread->return_error = BR_TRANSACTION_COMPLETE;
+ binder_send_failed_reply(in_reply_to, return_error);
+ } else
+ thread->return_error = return_error;
+}
+
+static int binder_thread_write(struct binder_proc *proc,
+ struct binder_thread *thread,
+ binder_uintptr_t binder_buffer, size_t size,
+ binder_size_t *consumed)
+{
+ uint32_t cmd;
+ void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
+ void __user *ptr = buffer + *consumed;
+ void __user *end = buffer + size;
+
+ while (ptr < end && thread->return_error == BR_OK) {
+ if (get_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ trace_binder_command(cmd);
+ if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) {
+ binder_stats.bc[_IOC_NR(cmd)]++;
+ proc->stats.bc[_IOC_NR(cmd)]++;
+ thread->stats.bc[_IOC_NR(cmd)]++;
+ }
+ switch (cmd) {
+ case BC_INCREFS:
+ case BC_ACQUIRE:
+ case BC_RELEASE:
+ case BC_DECREFS: {
+ uint32_t target;
+ struct binder_ref *ref;
+ const char *debug_string;
+
+ if (get_user(target, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (target == 0 && binder_context_mgr_node &&
+ (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) {
+ ref = binder_get_ref_for_node(proc,
+ binder_context_mgr_node);
+ if (ref->desc != target) {
+ binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n",
+ proc->pid, thread->pid,
+ ref->desc);
+ }
+ } else
+ ref = binder_get_ref(proc, target);
+ if (ref == NULL) {
+ binder_user_error("%d:%d refcount change on invalid ref %d\n",
+ proc->pid, thread->pid, target);
+ break;
+ }
+ switch (cmd) {
+ case BC_INCREFS:
+ debug_string = "IncRefs";
+ binder_inc_ref(ref, 0, NULL);
+ break;
+ case BC_ACQUIRE:
+ debug_string = "Acquire";
+ binder_inc_ref(ref, 1, NULL);
+ break;
+ case BC_RELEASE:
+ debug_string = "Release";
+ binder_dec_ref(ref, 1);
+ break;
+ case BC_DECREFS:
+ default:
+ debug_string = "DecRefs";
+ binder_dec_ref(ref, 0);
+ break;
+ }
+ binder_debug(BINDER_DEBUG_USER_REFS,
+ "%d:%d %s ref %d desc %d s %d w %d for node %d\n",
+ proc->pid, thread->pid, debug_string, ref->debug_id,
+ ref->desc, ref->strong, ref->weak, ref->node->debug_id);
+ break;
+ }
+ case BC_INCREFS_DONE:
+ case BC_ACQUIRE_DONE: {
+ binder_uintptr_t node_ptr;
+ binder_uintptr_t cookie;
+ struct binder_node *node;
+
+ if (get_user(node_ptr, (binder_uintptr_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(binder_uintptr_t);
+ if (get_user(cookie, (binder_uintptr_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(binder_uintptr_t);
+ node = binder_get_node(proc, node_ptr);
+ if (node == NULL) {
+ binder_user_error("%d:%d %s u%016llx no match\n",
+ proc->pid, thread->pid,
+ cmd == BC_INCREFS_DONE ?
+ "BC_INCREFS_DONE" :
+ "BC_ACQUIRE_DONE",
+ (u64)node_ptr);
+ break;
+ }
+ if (cookie != node->cookie) {
+ binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n",
+ proc->pid, thread->pid,
+ cmd == BC_INCREFS_DONE ?
+ "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
+ (u64)node_ptr, node->debug_id,
+ (u64)cookie, (u64)node->cookie);
+ break;
+ }
+ if (cmd == BC_ACQUIRE_DONE) {
+ if (node->pending_strong_ref == 0) {
+ binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n",
+ proc->pid, thread->pid,
+ node->debug_id);
+ break;
+ }
+ node->pending_strong_ref = 0;
+ } else {
+ if (node->pending_weak_ref == 0) {
+ binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n",
+ proc->pid, thread->pid,
+ node->debug_id);
+ break;
+ }
+ node->pending_weak_ref = 0;
+ }
+ binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0);
+ binder_debug(BINDER_DEBUG_USER_REFS,
+ "%d:%d %s node %d ls %d lw %d\n",
+ proc->pid, thread->pid,
+ cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
+ node->debug_id, node->local_strong_refs, node->local_weak_refs);
+ break;
+ }
+ case BC_ATTEMPT_ACQUIRE:
+ pr_err("BC_ATTEMPT_ACQUIRE not supported\n");
+ return -EINVAL;
+ case BC_ACQUIRE_RESULT:
+ pr_err("BC_ACQUIRE_RESULT not supported\n");
+ return -EINVAL;
+
+ case BC_FREE_BUFFER: {
+ binder_uintptr_t data_ptr;
+ struct binder_buffer *buffer;
+
+ if (get_user(data_ptr, (binder_uintptr_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(binder_uintptr_t);
+
+ buffer = binder_buffer_lookup(proc, data_ptr);
+ if (buffer == NULL) {
+ binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n",
+ proc->pid, thread->pid, (u64)data_ptr);
+ break;
+ }
+ if (!buffer->allow_user_free) {
+ binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n",
+ proc->pid, thread->pid, (u64)data_ptr);
+ break;
+ }
+ binder_debug(BINDER_DEBUG_FREE_BUFFER,
+ "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n",
+ proc->pid, thread->pid, (u64)data_ptr,
+ buffer->debug_id,
+ buffer->transaction ? "active" : "finished");
+
+ if (buffer->transaction) {
+ buffer->transaction->buffer = NULL;
+ buffer->transaction = NULL;
+ }
+ if (buffer->async_transaction && buffer->target_node) {
+ BUG_ON(!buffer->target_node->has_async_transaction);
+ if (list_empty(&buffer->target_node->async_todo))
+ buffer->target_node->has_async_transaction = 0;
+ else
+ list_move_tail(buffer->target_node->async_todo.next, &thread->todo);
+ }
+ trace_binder_transaction_buffer_release(buffer);
+ binder_transaction_buffer_release(proc, buffer, NULL);
+ binder_free_buf(proc, buffer);
+ break;
+ }
+
+ case BC_TRANSACTION:
+ case BC_REPLY: {
+ struct binder_transaction_data tr;
+
+ if (copy_from_user(&tr, ptr, sizeof(tr)))
+ return -EFAULT;
+ ptr += sizeof(tr);
+ binder_transaction(proc, thread, &tr, cmd == BC_REPLY);
+ break;
+ }
+
+ case BC_REGISTER_LOOPER:
+ binder_debug(BINDER_DEBUG_THREADS,
+ "%d:%d BC_REGISTER_LOOPER\n",
+ proc->pid, thread->pid);
+ if (thread->looper & BINDER_LOOPER_STATE_ENTERED) {
+ thread->looper |= BINDER_LOOPER_STATE_INVALID;
+ binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n",
+ proc->pid, thread->pid);
+ } else if (proc->requested_threads == 0) {
+ thread->looper |= BINDER_LOOPER_STATE_INVALID;
+ binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n",
+ proc->pid, thread->pid);
+ } else {
+ proc->requested_threads--;
+ proc->requested_threads_started++;
+ }
+ thread->looper |= BINDER_LOOPER_STATE_REGISTERED;
+ break;
+ case BC_ENTER_LOOPER:
+ binder_debug(BINDER_DEBUG_THREADS,
+ "%d:%d BC_ENTER_LOOPER\n",
+ proc->pid, thread->pid);
+ if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) {
+ thread->looper |= BINDER_LOOPER_STATE_INVALID;
+ binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n",
+ proc->pid, thread->pid);
+ }
+ thread->looper |= BINDER_LOOPER_STATE_ENTERED;
+ break;
+ case BC_EXIT_LOOPER:
+ binder_debug(BINDER_DEBUG_THREADS,
+ "%d:%d BC_EXIT_LOOPER\n",
+ proc->pid, thread->pid);
+ thread->looper |= BINDER_LOOPER_STATE_EXITED;
+ break;
+
+ case BC_REQUEST_DEATH_NOTIFICATION:
+ case BC_CLEAR_DEATH_NOTIFICATION: {
+ uint32_t target;
+ binder_uintptr_t cookie;
+ struct binder_ref *ref;
+ struct binder_ref_death *death;
+
+ if (get_user(target, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (get_user(cookie, (binder_uintptr_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(binder_uintptr_t);
+ ref = binder_get_ref(proc, target);
+ if (ref == NULL) {
+ binder_user_error("%d:%d %s invalid ref %d\n",
+ proc->pid, thread->pid,
+ cmd == BC_REQUEST_DEATH_NOTIFICATION ?
+ "BC_REQUEST_DEATH_NOTIFICATION" :
+ "BC_CLEAR_DEATH_NOTIFICATION",
+ target);
+ break;
+ }
+
+ binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
+ "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n",
+ proc->pid, thread->pid,
+ cmd == BC_REQUEST_DEATH_NOTIFICATION ?
+ "BC_REQUEST_DEATH_NOTIFICATION" :
+ "BC_CLEAR_DEATH_NOTIFICATION",
+ (u64)cookie, ref->debug_id, ref->desc,
+ ref->strong, ref->weak, ref->node->debug_id);
+
+ if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
+ if (ref->death) {
+ binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n",
+ proc->pid, thread->pid);
+ break;
+ }
+ death = kzalloc(sizeof(*death), GFP_KERNEL);
+ if (death == NULL) {
+ thread->return_error = BR_ERROR;
+ binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
+ "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n",
+ proc->pid, thread->pid);
+ break;
+ }
+ binder_stats_created(BINDER_STAT_DEATH);
+ INIT_LIST_HEAD(&death->work.entry);
+ death->cookie = cookie;
+ ref->death = death;
+ if (ref->node->proc == NULL) {
+ ref->death->work.type = BINDER_WORK_DEAD_BINDER;
+ if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+ list_add_tail(&ref->death->work.entry, &thread->todo);
+ } else {
+ list_add_tail(&ref->death->work.entry, &proc->todo);
+ wake_up_interruptible(&proc->wait);
+ }
+ }
+ } else {
+ if (ref->death == NULL) {
+ binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n",
+ proc->pid, thread->pid);
+ break;
+ }
+ death = ref->death;
+ if (death->cookie != cookie) {
+ binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n",
+ proc->pid, thread->pid,
+ (u64)death->cookie,
+ (u64)cookie);
+ break;
+ }
+ ref->death = NULL;
+ if (list_empty(&death->work.entry)) {
+ death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
+ if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+ list_add_tail(&death->work.entry, &thread->todo);
+ } else {
+ list_add_tail(&death->work.entry, &proc->todo);
+ wake_up_interruptible(&proc->wait);
+ }
+ } else {
+ BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
+ death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
+ }
+ }
+ } break;
+ case BC_DEAD_BINDER_DONE: {
+ struct binder_work *w;
+ binder_uintptr_t cookie;
+ struct binder_ref_death *death = NULL;
+
+ if (get_user(cookie, (binder_uintptr_t __user *)ptr))
+ return -EFAULT;
+
+ ptr += sizeof(void *);
+ list_for_each_entry(w, &proc->delivered_death, entry) {
+ struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);
+
+ if (tmp_death->cookie == cookie) {
+ death = tmp_death;
+ break;
+ }
+ }
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n",
+ proc->pid, thread->pid, (u64)cookie,
+ death);
+ if (death == NULL) {
+ binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n",
+ proc->pid, thread->pid, (u64)cookie);
+ break;
+ }
+
+ list_del_init(&death->work.entry);
+ if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
+ death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
+ if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+ list_add_tail(&death->work.entry, &thread->todo);
+ } else {
+ list_add_tail(&death->work.entry, &proc->todo);
+ wake_up_interruptible(&proc->wait);
+ }
+ }
+ } break;
+
+ default:
+ pr_err("%d:%d unknown command %d\n",
+ proc->pid, thread->pid, cmd);
+ return -EINVAL;
+ }
+ *consumed = ptr - buffer;
+ }
+ return 0;
+}
+
+static void binder_stat_br(struct binder_proc *proc,
+ struct binder_thread *thread, uint32_t cmd)
+{
+ trace_binder_return(cmd);
+ if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) {
+ binder_stats.br[_IOC_NR(cmd)]++;
+ proc->stats.br[_IOC_NR(cmd)]++;
+ thread->stats.br[_IOC_NR(cmd)]++;
+ }
+}
+
+static int binder_has_proc_work(struct binder_proc *proc,
+ struct binder_thread *thread)
+{
+ return !list_empty(&proc->todo) ||
+ (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
+}
+
+static int binder_has_thread_work(struct binder_thread *thread)
+{
+ return !list_empty(&thread->todo) || thread->return_error != BR_OK ||
+ (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
+}
+
+static int binder_thread_read(struct binder_proc *proc,
+ struct binder_thread *thread,
+ binder_uintptr_t binder_buffer, size_t size,
+ binder_size_t *consumed, int non_block)
+{
+ void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
+ void __user *ptr = buffer + *consumed;
+ void __user *end = buffer + size;
+
+ int ret = 0;
+ int wait_for_proc_work;
+
+ if (*consumed == 0) {
+ if (put_user(BR_NOOP, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ }
+
+retry:
+ wait_for_proc_work = thread->transaction_stack == NULL &&
+ list_empty(&thread->todo);
+
+ if (thread->return_error != BR_OK && ptr < end) {
+ if (thread->return_error2 != BR_OK) {
+ if (put_user(thread->return_error2, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ binder_stat_br(proc, thread, thread->return_error2);
+ if (ptr == end)
+ goto done;
+ thread->return_error2 = BR_OK;
+ }
+ if (put_user(thread->return_error, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ binder_stat_br(proc, thread, thread->return_error);
+ thread->return_error = BR_OK;
+ goto done;
+ }
+
+
+ thread->looper |= BINDER_LOOPER_STATE_WAITING;
+ if (wait_for_proc_work)
+ proc->ready_threads++;
+
+ binder_unlock(__func__);
+
+ trace_binder_wait_for_work(wait_for_proc_work,
+ !!thread->transaction_stack,
+ !list_empty(&thread->todo));
+ if (wait_for_proc_work) {
+ if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
+ BINDER_LOOPER_STATE_ENTERED))) {
+ binder_user_error("%d:%d ERROR: Thread waiting for process work before calling BC_REGISTER_LOOPER or BC_ENTER_LOOPER (state %x)\n",
+ proc->pid, thread->pid, thread->looper);
+ wait_event_interruptible(binder_user_error_wait,
+ binder_stop_on_user_error < 2);
+ }
+ binder_set_nice(proc->default_priority);
+ if (non_block) {
+ if (!binder_has_proc_work(proc, thread))
+ ret = -EAGAIN;
+ } else
+ ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread));
+ } else {
+ if (non_block) {
+ if (!binder_has_thread_work(thread))
+ ret = -EAGAIN;
+ } else
+ ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread));
+ }
+
+ binder_lock(__func__);
+
+ if (wait_for_proc_work)
+ proc->ready_threads--;
+ thread->looper &= ~BINDER_LOOPER_STATE_WAITING;
+
+ if (ret)
+ return ret;
+
+ while (1) {
+ uint32_t cmd;
+ struct binder_transaction_data tr;
+ struct binder_work *w;
+ struct binder_transaction *t = NULL;
+
+ if (!list_empty(&thread->todo)) {
+ w = list_first_entry(&thread->todo, struct binder_work,
+ entry);
+ } else if (!list_empty(&proc->todo) && wait_for_proc_work) {
+ w = list_first_entry(&proc->todo, struct binder_work,
+ entry);
+ } else {
+ /* no data added */
+ if (ptr - buffer == 4 &&
+ !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN))
+ goto retry;
+ break;
+ }
+
+ if (end - ptr < sizeof(tr) + 4)
+ break;
+
+ switch (w->type) {
+ case BINDER_WORK_TRANSACTION: {
+ t = container_of(w, struct binder_transaction, work);
+ } break;
+ case BINDER_WORK_TRANSACTION_COMPLETE: {
+ cmd = BR_TRANSACTION_COMPLETE;
+ if (put_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+
+ binder_stat_br(proc, thread, cmd);
+ binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE,
+ "%d:%d BR_TRANSACTION_COMPLETE\n",
+ proc->pid, thread->pid);
+
+ list_del(&w->entry);
+ kfree(w);
+ binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
+ } break;
+ case BINDER_WORK_NODE: {
+ struct binder_node *node = container_of(w, struct binder_node, work);
+ uint32_t cmd = BR_NOOP;
+ const char *cmd_name;
+ int strong = node->internal_strong_refs || node->local_strong_refs;
+ int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong;
+
+ if (weak && !node->has_weak_ref) {
+ cmd = BR_INCREFS;
+ cmd_name = "BR_INCREFS";
+ node->has_weak_ref = 1;
+ node->pending_weak_ref = 1;
+ node->local_weak_refs++;
+ } else if (strong && !node->has_strong_ref) {
+ cmd = BR_ACQUIRE;
+ cmd_name = "BR_ACQUIRE";
+ node->has_strong_ref = 1;
+ node->pending_strong_ref = 1;
+ node->local_strong_refs++;
+ } else if (!strong && node->has_strong_ref) {
+ cmd = BR_RELEASE;
+ cmd_name = "BR_RELEASE";
+ node->has_strong_ref = 0;
+ } else if (!weak && node->has_weak_ref) {
+ cmd = BR_DECREFS;
+ cmd_name = "BR_DECREFS";
+ node->has_weak_ref = 0;
+ }
+ if (cmd != BR_NOOP) {
+ if (put_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (put_user(node->ptr,
+ (binder_uintptr_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(binder_uintptr_t);
+ if (put_user(node->cookie,
+ (binder_uintptr_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(binder_uintptr_t);
+
+ binder_stat_br(proc, thread, cmd);
+ binder_debug(BINDER_DEBUG_USER_REFS,
+ "%d:%d %s %d u%016llx c%016llx\n",
+ proc->pid, thread->pid, cmd_name,
+ node->debug_id,
+ (u64)node->ptr, (u64)node->cookie);
+ } else {
+ list_del_init(&w->entry);
+ if (!weak && !strong) {
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "%d:%d node %d u%016llx c%016llx deleted\n",
+ proc->pid, thread->pid,
+ node->debug_id,
+ (u64)node->ptr,
+ (u64)node->cookie);
+ rb_erase(&node->rb_node, &proc->nodes);
+ kfree(node);
+ binder_stats_deleted(BINDER_STAT_NODE);
+ } else {
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "%d:%d node %d u%016llx c%016llx state unchanged\n",
+ proc->pid, thread->pid,
+ node->debug_id,
+ (u64)node->ptr,
+ (u64)node->cookie);
+ }
+ }
+ } break;
+ case BINDER_WORK_DEAD_BINDER:
+ case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
+ case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
+ struct binder_ref_death *death;
+ uint32_t cmd;
+
+ death = container_of(w, struct binder_ref_death, work);
+ if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
+ cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
+ else
+ cmd = BR_DEAD_BINDER;
+ if (put_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (put_user(death->cookie,
+ (binder_uintptr_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(binder_uintptr_t);
+ binder_stat_br(proc, thread, cmd);
+ binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
+ "%d:%d %s %016llx\n",
+ proc->pid, thread->pid,
+ cmd == BR_DEAD_BINDER ?
+ "BR_DEAD_BINDER" :
+ "BR_CLEAR_DEATH_NOTIFICATION_DONE",
+ (u64)death->cookie);
+
+ if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
+ list_del(&w->entry);
+ kfree(death);
+ binder_stats_deleted(BINDER_STAT_DEATH);
+ } else
+ list_move(&w->entry, &proc->delivered_death);
+ if (cmd == BR_DEAD_BINDER)
+ goto done; /* DEAD_BINDER notifications can cause transactions */
+ } break;
+ }
+
+ if (!t)
+ continue;
+
+ BUG_ON(t->buffer == NULL);
+ if (t->buffer->target_node) {
+ struct binder_node *target_node = t->buffer->target_node;
+
+ tr.target.ptr = target_node->ptr;
+ tr.cookie = target_node->cookie;
+ t->saved_priority = task_nice(current);
+ if (t->priority < target_node->min_priority &&
+ !(t->flags & TF_ONE_WAY))
+ binder_set_nice(t->priority);
+ else if (!(t->flags & TF_ONE_WAY) ||
+ t->saved_priority > target_node->min_priority)
+ binder_set_nice(target_node->min_priority);
+ cmd = BR_TRANSACTION;
+ } else {
+ tr.target.ptr = 0;
+ tr.cookie = 0;
+ cmd = BR_REPLY;
+ }
+ tr.code = t->code;
+ tr.flags = t->flags;
+ tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid);
+
+ if (t->from) {
+ struct task_struct *sender = t->from->proc->tsk;
+
+ tr.sender_pid = task_tgid_nr_ns(sender,
+ task_active_pid_ns(current));
+ } else {
+ tr.sender_pid = 0;
+ }
+
+ tr.data_size = t->buffer->data_size;
+ tr.offsets_size = t->buffer->offsets_size;
+ tr.data.ptr.buffer = (binder_uintptr_t)(
+ (uintptr_t)t->buffer->data +
+ proc->user_buffer_offset);
+ tr.data.ptr.offsets = tr.data.ptr.buffer +
+ ALIGN(t->buffer->data_size,
+ sizeof(void *));
+
+ if (put_user(cmd, (uint32_t __user *)ptr))
+ return -EFAULT;
+ ptr += sizeof(uint32_t);
+ if (copy_to_user(ptr, &tr, sizeof(tr)))
+ return -EFAULT;
+ ptr += sizeof(tr);
+
+ trace_binder_transaction_received(t);
+ binder_stat_br(proc, thread, cmd);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n",
+ proc->pid, thread->pid,
+ (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
+ "BR_REPLY",
+ t->debug_id, t->from ? t->from->proc->pid : 0,
+ t->from ? t->from->pid : 0, cmd,
+ t->buffer->data_size, t->buffer->offsets_size,
+ (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets);
+
+ list_del(&t->work.entry);
+ t->buffer->allow_user_free = 1;
+ if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
+ t->to_parent = thread->transaction_stack;
+ t->to_thread = thread;
+ thread->transaction_stack = t;
+ } else {
+ t->buffer->transaction = NULL;
+ kfree(t);
+ binder_stats_deleted(BINDER_STAT_TRANSACTION);
+ }
+ break;
+ }
+
+done:
+
+ *consumed = ptr - buffer;
+ if (proc->requested_threads + proc->ready_threads == 0 &&
+ proc->requested_threads_started < proc->max_threads &&
+ (thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
+ BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
+ /*spawn a new thread if we leave this out */) {
+ proc->requested_threads++;
+ binder_debug(BINDER_DEBUG_THREADS,
+ "%d:%d BR_SPAWN_LOOPER\n",
+ proc->pid, thread->pid);
+ if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer))
+ return -EFAULT;
+ binder_stat_br(proc, thread, BR_SPAWN_LOOPER);
+ }
+ return 0;
+}
+
+static void binder_release_work(struct list_head *list)
+{
+ struct binder_work *w;
+
+ while (!list_empty(list)) {
+ w = list_first_entry(list, struct binder_work, entry);
+ list_del_init(&w->entry);
+ switch (w->type) {
+ case BINDER_WORK_TRANSACTION: {
+ struct binder_transaction *t;
+
+ t = container_of(w, struct binder_transaction, work);
+ if (t->buffer->target_node &&
+ !(t->flags & TF_ONE_WAY)) {
+ binder_send_failed_reply(t, BR_DEAD_REPLY);
+ } else {
+ binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
+ "undelivered transaction %d\n",
+ t->debug_id);
+ t->buffer->transaction = NULL;
+ kfree(t);
+ binder_stats_deleted(BINDER_STAT_TRANSACTION);
+ }
+ } break;
+ case BINDER_WORK_TRANSACTION_COMPLETE: {
+ binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
+ "undelivered TRANSACTION_COMPLETE\n");
+ kfree(w);
+ binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
+ } break;
+ case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
+ case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
+ struct binder_ref_death *death;
+
+ death = container_of(w, struct binder_ref_death, work);
+ binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
+ "undelivered death notification, %016llx\n",
+ (u64)death->cookie);
+ kfree(death);
+ binder_stats_deleted(BINDER_STAT_DEATH);
+ } break;
+ default:
+ pr_err("unexpected work type, %d, not freed\n",
+ w->type);
+ break;
+ }
+ }
+
+}
+
+static struct binder_thread *binder_get_thread(struct binder_proc *proc)
+{
+ struct binder_thread *thread = NULL;
+ struct rb_node *parent = NULL;
+ struct rb_node **p = &proc->threads.rb_node;
+
+ while (*p) {
+ parent = *p;
+ thread = rb_entry(parent, struct binder_thread, rb_node);
+
+ if (current->pid < thread->pid)
+ p = &(*p)->rb_left;
+ else if (current->pid > thread->pid)
+ p = &(*p)->rb_right;
+ else
+ break;
+ }
+ if (*p == NULL) {
+ thread = kzalloc(sizeof(*thread), GFP_KERNEL);
+ if (thread == NULL)
+ return NULL;
+ binder_stats_created(BINDER_STAT_THREAD);
+ thread->proc = proc;
+ thread->pid = current->pid;
+ init_waitqueue_head(&thread->wait);
+ INIT_LIST_HEAD(&thread->todo);
+ rb_link_node(&thread->rb_node, parent, p);
+ rb_insert_color(&thread->rb_node, &proc->threads);
+ thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
+ thread->return_error = BR_OK;
+ thread->return_error2 = BR_OK;
+ }
+ return thread;
+}
+
+static int binder_free_thread(struct binder_proc *proc,
+ struct binder_thread *thread)
+{
+ struct binder_transaction *t;
+ struct binder_transaction *send_reply = NULL;
+ int active_transactions = 0;
+
+ rb_erase(&thread->rb_node, &proc->threads);
+ t = thread->transaction_stack;
+ if (t && t->to_thread == thread)
+ send_reply = t;
+ while (t) {
+ active_transactions++;
+ binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
+ "release %d:%d transaction %d %s, still active\n",
+ proc->pid, thread->pid,
+ t->debug_id,
+ (t->to_thread == thread) ? "in" : "out");
+
+ if (t->to_thread == thread) {
+ t->to_proc = NULL;
+ t->to_thread = NULL;
+ if (t->buffer) {
+ t->buffer->transaction = NULL;
+ t->buffer = NULL;
+ }
+ t = t->to_parent;
+ } else if (t->from == thread) {
+ t->from = NULL;
+ t = t->from_parent;
+ } else
+ BUG();
+ }
+ if (send_reply)
+ binder_send_failed_reply(send_reply, BR_DEAD_REPLY);
+ binder_release_work(&thread->todo);
+ kfree(thread);
+ binder_stats_deleted(BINDER_STAT_THREAD);
+ return active_transactions;
+}
+
+static unsigned int binder_poll(struct file *filp,
+ struct poll_table_struct *wait)
+{
+ struct binder_proc *proc = filp->private_data;
+ struct binder_thread *thread = NULL;
+ int wait_for_proc_work;
+
+ binder_lock(__func__);
+
+ thread = binder_get_thread(proc);
+
+ wait_for_proc_work = thread->transaction_stack == NULL &&
+ list_empty(&thread->todo) && thread->return_error == BR_OK;
+
+ binder_unlock(__func__);
+
+ if (wait_for_proc_work) {
+ if (binder_has_proc_work(proc, thread))
+ return POLLIN;
+ poll_wait(filp, &proc->wait, wait);
+ if (binder_has_proc_work(proc, thread))
+ return POLLIN;
+ } else {
+ if (binder_has_thread_work(thread))
+ return POLLIN;
+ poll_wait(filp, &thread->wait, wait);
+ if (binder_has_thread_work(thread))
+ return POLLIN;
+ }
+ return 0;
+}
+
+static int binder_ioctl_write_read(struct file *filp,
+ unsigned int cmd, unsigned long arg,
+ struct binder_thread *thread)
+{
+ int ret = 0;
+ struct binder_proc *proc = filp->private_data;
+ unsigned int size = _IOC_SIZE(cmd);
+ void __user *ubuf = (void __user *)arg;
+ struct binder_write_read bwr;
+
+ if (size != sizeof(struct binder_write_read)) {
+ ret = -EINVAL;
+ goto out;
+ }
+ if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
+ ret = -EFAULT;
+ goto out;
+ }
+ binder_debug(BINDER_DEBUG_READ_WRITE,
+ "%d:%d write %lld at %016llx, read %lld at %016llx\n",
+ proc->pid, thread->pid,
+ (u64)bwr.write_size, (u64)bwr.write_buffer,
+ (u64)bwr.read_size, (u64)bwr.read_buffer);
+
+ if (bwr.write_size > 0) {
+ ret = binder_thread_write(proc, thread,
+ bwr.write_buffer,
+ bwr.write_size,
+ &bwr.write_consumed);
+ trace_binder_write_done(ret);
+ if (ret < 0) {
+ bwr.read_consumed = 0;
+ if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
+ ret = -EFAULT;
+ goto out;
+ }
+ }
+ if (bwr.read_size > 0) {
+ ret = binder_thread_read(proc, thread, bwr.read_buffer,
+ bwr.read_size,
+ &bwr.read_consumed,
+ filp->f_flags & O_NONBLOCK);
+ trace_binder_read_done(ret);
+ if (!list_empty(&proc->todo))
+ wake_up_interruptible(&proc->wait);
+ if (ret < 0) {
+ if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
+ ret = -EFAULT;
+ goto out;
+ }
+ }
+ binder_debug(BINDER_DEBUG_READ_WRITE,
+ "%d:%d wrote %lld of %lld, read return %lld of %lld\n",
+ proc->pid, thread->pid,
+ (u64)bwr.write_consumed, (u64)bwr.write_size,
+ (u64)bwr.read_consumed, (u64)bwr.read_size);
+ if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
+ ret = -EFAULT;
+ goto out;
+ }
+out:
+ return ret;
+}
+
+static int binder_ioctl_set_ctx_mgr(struct file *filp)
+{
+ int ret = 0;
+ struct binder_proc *proc = filp->private_data;
+ kuid_t curr_euid = current_euid();
+
+ if (binder_context_mgr_node != NULL) {
+ pr_err("BINDER_SET_CONTEXT_MGR already set\n");
+ ret = -EBUSY;
+ goto out;
+ }
+ if (uid_valid(binder_context_mgr_uid)) {
+ if (!uid_eq(binder_context_mgr_uid, curr_euid)) {
+ pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
+ from_kuid(&init_user_ns, curr_euid),
+ from_kuid(&init_user_ns,
+ binder_context_mgr_uid));
+ ret = -EPERM;
+ goto out;
+ }
+ } else {
+ binder_context_mgr_uid = curr_euid;
+ }
+ binder_context_mgr_node = binder_new_node(proc, 0, 0);
+ if (binder_context_mgr_node == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ binder_context_mgr_node->local_weak_refs++;
+ binder_context_mgr_node->local_strong_refs++;
+ binder_context_mgr_node->has_strong_ref = 1;
+ binder_context_mgr_node->has_weak_ref = 1;
+out:
+ return ret;
+}
+
+static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ int ret;
+ struct binder_proc *proc = filp->private_data;
+ struct binder_thread *thread;
+ unsigned int size = _IOC_SIZE(cmd);
+ void __user *ubuf = (void __user *)arg;
+
+ /*pr_info("binder_ioctl: %d:%d %x %lx\n",
+ proc->pid, current->pid, cmd, arg);*/
+
+ trace_binder_ioctl(cmd, arg);
+
+ ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
+ if (ret)
+ goto err_unlocked;
+
+ binder_lock(__func__);
+ thread = binder_get_thread(proc);
+ if (thread == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ switch (cmd) {
+ case BINDER_WRITE_READ:
+ ret = binder_ioctl_write_read(filp, cmd, arg, thread);
+ if (ret)
+ goto err;
+ break;
+ case BINDER_SET_MAX_THREADS:
+ if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
+ ret = -EINVAL;
+ goto err;
+ }
+ break;
+ case BINDER_SET_CONTEXT_MGR:
+ ret = binder_ioctl_set_ctx_mgr(filp);
+ if (ret)
+ goto err;
+ break;
+ case BINDER_THREAD_EXIT:
+ binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n",
+ proc->pid, thread->pid);
+ binder_free_thread(proc, thread);
+ thread = NULL;
+ break;
+ case BINDER_VERSION: {
+ struct binder_version __user *ver = ubuf;
+
+ if (size != sizeof(struct binder_version)) {
+ ret = -EINVAL;
+ goto err;
+ }
+ if (put_user(BINDER_CURRENT_PROTOCOL_VERSION,
+ &ver->protocol_version)) {
+ ret = -EINVAL;
+ goto err;
+ }
+ break;
+ }
+ default:
+ ret = -EINVAL;
+ goto err;
+ }
+ ret = 0;
+err:
+ if (thread)
+ thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN;
+ binder_unlock(__func__);
+ wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
+ if (ret && ret != -ERESTARTSYS)
+ pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret);
+err_unlocked:
+ trace_binder_ioctl_done(ret);
+ return ret;
+}
+
+static void binder_vma_open(struct vm_area_struct *vma)
+{
+ struct binder_proc *proc = vma->vm_private_data;
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
+ proc->pid, vma->vm_start, vma->vm_end,
+ (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
+ (unsigned long)pgprot_val(vma->vm_page_prot));
+}
+
+static void binder_vma_close(struct vm_area_struct *vma)
+{
+ struct binder_proc *proc = vma->vm_private_data;
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
+ proc->pid, vma->vm_start, vma->vm_end,
+ (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
+ (unsigned long)pgprot_val(vma->vm_page_prot));
+ proc->vma = NULL;
+ proc->vma_vm_mm = NULL;
+ binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES);
+}
+
+static int binder_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ return VM_FAULT_SIGBUS;
+}
+
+static struct vm_operations_struct binder_vm_ops = {
+ .open = binder_vma_open,
+ .close = binder_vma_close,
+ .fault = binder_vm_fault,
+};
+
+static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ int ret;
+ struct vm_struct *area;
+ struct binder_proc *proc = filp->private_data;
+ const char *failure_string;
+ struct binder_buffer *buffer;
+
+ if (proc->tsk != current)
+ return -EINVAL;
+
+ if ((vma->vm_end - vma->vm_start) > SZ_4M)
+ vma->vm_end = vma->vm_start + SZ_4M;
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n",
+ proc->pid, vma->vm_start, vma->vm_end,
+ (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
+ (unsigned long)pgprot_val(vma->vm_page_prot));
+
+ if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
+ ret = -EPERM;
+ failure_string = "bad vm_flags";
+ goto err_bad_arg;
+ }
+ vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE;
+
+ mutex_lock(&binder_mmap_lock);
+ if (proc->buffer) {
+ ret = -EBUSY;
+ failure_string = "already mapped";
+ goto err_already_mapped;
+ }
+
+ area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP);
+ if (area == NULL) {
+ ret = -ENOMEM;
+ failure_string = "get_vm_area";
+ goto err_get_vm_area_failed;
+ }
+ proc->buffer = area->addr;
+ proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer;
+ mutex_unlock(&binder_mmap_lock);
+
+#ifdef CONFIG_CPU_CACHE_VIPT
+ if (cache_is_vipt_aliasing()) {
+ while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) {
+ pr_info("binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);
+ vma->vm_start += PAGE_SIZE;
+ }
+ }
+#endif
+ proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL);
+ if (proc->pages == NULL) {
+ ret = -ENOMEM;
+ failure_string = "alloc page array";
+ goto err_alloc_pages_failed;
+ }
+ proc->buffer_size = vma->vm_end - vma->vm_start;
+
+ vma->vm_ops = &binder_vm_ops;
+ vma->vm_private_data = proc;
+
+ if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) {
+ ret = -ENOMEM;
+ failure_string = "alloc small buf";
+ goto err_alloc_small_buf_failed;
+ }
+ buffer = proc->buffer;
+ INIT_LIST_HEAD(&proc->buffers);
+ list_add(&buffer->entry, &proc->buffers);
+ buffer->free = 1;
+ binder_insert_free_buffer(proc, buffer);
+ proc->free_async_space = proc->buffer_size / 2;
+ barrier();
+ proc->files = get_files_struct(current);
+ proc->vma = vma;
+ proc->vma_vm_mm = vma->vm_mm;
+
+ /*pr_info("binder_mmap: %d %lx-%lx maps %p\n",
+ proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/
+ return 0;
+
+err_alloc_small_buf_failed:
+ kfree(proc->pages);
+ proc->pages = NULL;
+err_alloc_pages_failed:
+ mutex_lock(&binder_mmap_lock);
+ vfree(proc->buffer);
+ proc->buffer = NULL;
+err_get_vm_area_failed:
+err_already_mapped:
+ mutex_unlock(&binder_mmap_lock);
+err_bad_arg:
+ pr_err("binder_mmap: %d %lx-%lx %s failed %d\n",
+ proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
+ return ret;
+}
+
+static int binder_open(struct inode *nodp, struct file *filp)
+{
+ struct binder_proc *proc;
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n",
+ current->group_leader->pid, current->pid);
+
+ proc = kzalloc(sizeof(*proc), GFP_KERNEL);
+ if (proc == NULL)
+ return -ENOMEM;
+ get_task_struct(current);
+ proc->tsk = current;
+ INIT_LIST_HEAD(&proc->todo);
+ init_waitqueue_head(&proc->wait);
+ proc->default_priority = task_nice(current);
+
+ binder_lock(__func__);
+
+ binder_stats_created(BINDER_STAT_PROC);
+ hlist_add_head(&proc->proc_node, &binder_procs);
+ proc->pid = current->group_leader->pid;
+ INIT_LIST_HEAD(&proc->delivered_death);
+ filp->private_data = proc;
+
+ binder_unlock(__func__);
+
+ if (binder_debugfs_dir_entry_proc) {
+ char strbuf[11];
+
+ snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
+ proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO,
+ binder_debugfs_dir_entry_proc, proc, &binder_proc_fops);
+ }
+
+ return 0;
+}
+
+static int binder_flush(struct file *filp, fl_owner_t id)
+{
+ struct binder_proc *proc = filp->private_data;
+
+ binder_defer_work(proc, BINDER_DEFERRED_FLUSH);
+
+ return 0;
+}
+
+static void binder_deferred_flush(struct binder_proc *proc)
+{
+ struct rb_node *n;
+ int wake_count = 0;
+
+ for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
+ struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
+
+ thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
+ if (thread->looper & BINDER_LOOPER_STATE_WAITING) {
+ wake_up_interruptible(&thread->wait);
+ wake_count++;
+ }
+ }
+ wake_up_interruptible_all(&proc->wait);
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "binder_flush: %d woke %d threads\n", proc->pid,
+ wake_count);
+}
+
+static int binder_release(struct inode *nodp, struct file *filp)
+{
+ struct binder_proc *proc = filp->private_data;
+
+ debugfs_remove(proc->debugfs_entry);
+ binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
+
+ return 0;
+}
+
+static int binder_node_release(struct binder_node *node, int refs)
+{
+ struct binder_ref *ref;
+ int death = 0;
+
+ list_del_init(&node->work.entry);
+ binder_release_work(&node->async_todo);
+
+ if (hlist_empty(&node->refs)) {
+ kfree(node);
+ binder_stats_deleted(BINDER_STAT_NODE);
+
+ return refs;
+ }
+
+ node->proc = NULL;
+ node->local_strong_refs = 0;
+ node->local_weak_refs = 0;
+ hlist_add_head(&node->dead_node, &binder_dead_nodes);
+
+ hlist_for_each_entry(ref, &node->refs, node_entry) {
+ refs++;
+
+ if (!ref->death)
+ continue;
+
+ death++;
+
+ if (list_empty(&ref->death->work.entry)) {
+ ref->death->work.type = BINDER_WORK_DEAD_BINDER;
+ list_add_tail(&ref->death->work.entry,
+ &ref->proc->todo);
+ wake_up_interruptible(&ref->proc->wait);
+ } else
+ BUG();
+ }
+
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "node %d now dead, refs %d, death %d\n",
+ node->debug_id, refs, death);
+
+ return refs;
+}
+
+static void binder_deferred_release(struct binder_proc *proc)
+{
+ struct binder_transaction *t;
+ struct rb_node *n;
+ int threads, nodes, incoming_refs, outgoing_refs, buffers,
+ active_transactions, page_count;
+
+ BUG_ON(proc->vma);
+ BUG_ON(proc->files);
+
+ hlist_del(&proc->proc_node);
+
+ if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "%s: %d context_mgr_node gone\n",
+ __func__, proc->pid);
+ binder_context_mgr_node = NULL;
+ }
+
+ threads = 0;
+ active_transactions = 0;
+ while ((n = rb_first(&proc->threads))) {
+ struct binder_thread *thread;
+
+ thread = rb_entry(n, struct binder_thread, rb_node);
+ threads++;
+ active_transactions += binder_free_thread(proc, thread);
+ }
+
+ nodes = 0;
+ incoming_refs = 0;
+ while ((n = rb_first(&proc->nodes))) {
+ struct binder_node *node;
+
+ node = rb_entry(n, struct binder_node, rb_node);
+ nodes++;
+ rb_erase(&node->rb_node, &proc->nodes);
+ incoming_refs = binder_node_release(node, incoming_refs);
+ }
+
+ outgoing_refs = 0;
+ while ((n = rb_first(&proc->refs_by_desc))) {
+ struct binder_ref *ref;
+
+ ref = rb_entry(n, struct binder_ref, rb_node_desc);
+ outgoing_refs++;
+ binder_delete_ref(ref);
+ }
+
+ binder_release_work(&proc->todo);
+ binder_release_work(&proc->delivered_death);
+
+ buffers = 0;
+ while ((n = rb_first(&proc->allocated_buffers))) {
+ struct binder_buffer *buffer;
+
+ buffer = rb_entry(n, struct binder_buffer, rb_node);
+
+ t = buffer->transaction;
+ if (t) {
+ t->buffer = NULL;
+ buffer->transaction = NULL;
+ pr_err("release proc %d, transaction %d, not freed\n",
+ proc->pid, t->debug_id);
+ /*BUG();*/
+ }
+
+ binder_free_buf(proc, buffer);
+ buffers++;
+ }
+
+ binder_stats_deleted(BINDER_STAT_PROC);
+
+ page_count = 0;
+ if (proc->pages) {
+ int i;
+
+ for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) {
+ void *page_addr;
+
+ if (!proc->pages[i])
+ continue;
+
+ page_addr = proc->buffer + i * PAGE_SIZE;
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "%s: %d: page %d at %p not freed\n",
+ __func__, proc->pid, i, page_addr);
+ unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
+ __free_page(proc->pages[i]);
+ page_count++;
+ }
+ kfree(proc->pages);
+ vfree(proc->buffer);
+ }
+
+ put_task_struct(proc->tsk);
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n",
+ __func__, proc->pid, threads, nodes, incoming_refs,
+ outgoing_refs, active_transactions, buffers, page_count);
+
+ kfree(proc);
+}
+
+static void binder_deferred_func(struct work_struct *work)
+{
+ struct binder_proc *proc;
+ struct files_struct *files;
+
+ int defer;
+
+ do {
+ binder_lock(__func__);
+ mutex_lock(&binder_deferred_lock);
+ if (!hlist_empty(&binder_deferred_list)) {
+ proc = hlist_entry(binder_deferred_list.first,
+ struct binder_proc, deferred_work_node);
+ hlist_del_init(&proc->deferred_work_node);
+ defer = proc->deferred_work;
+ proc->deferred_work = 0;
+ } else {
+ proc = NULL;
+ defer = 0;
+ }
+ mutex_unlock(&binder_deferred_lock);
+
+ files = NULL;
+ if (defer & BINDER_DEFERRED_PUT_FILES) {
+ files = proc->files;
+ if (files)
+ proc->files = NULL;
+ }
+
+ if (defer & BINDER_DEFERRED_FLUSH)
+ binder_deferred_flush(proc);
+
+ if (defer & BINDER_DEFERRED_RELEASE)
+ binder_deferred_release(proc); /* frees proc */
+
+ binder_unlock(__func__);
+ if (files)
+ put_files_struct(files);
+ } while (proc);
+}
+static DECLARE_WORK(binder_deferred_work, binder_deferred_func);
+
+static void
+binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer)
+{
+ mutex_lock(&binder_deferred_lock);
+ proc->deferred_work |= defer;
+ if (hlist_unhashed(&proc->deferred_work_node)) {
+ hlist_add_head(&proc->deferred_work_node,
+ &binder_deferred_list);
+ queue_work(binder_deferred_workqueue, &binder_deferred_work);
+ }
+ mutex_unlock(&binder_deferred_lock);
+}
+
+static void print_binder_transaction(struct seq_file *m, const char *prefix,
+ struct binder_transaction *t)
+{
+ seq_printf(m,
+ "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d",
+ prefix, t->debug_id, t,
+ t->from ? t->from->proc->pid : 0,
+ t->from ? t->from->pid : 0,
+ t->to_proc ? t->to_proc->pid : 0,
+ t->to_thread ? t->to_thread->pid : 0,
+ t->code, t->flags, t->priority, t->need_reply);
+ if (t->buffer == NULL) {
+ seq_puts(m, " buffer free\n");
+ return;
+ }
+ if (t->buffer->target_node)
+ seq_printf(m, " node %d",
+ t->buffer->target_node->debug_id);
+ seq_printf(m, " size %zd:%zd data %p\n",
+ t->buffer->data_size, t->buffer->offsets_size,
+ t->buffer->data);
+}
+
+static void print_binder_buffer(struct seq_file *m, const char *prefix,
+ struct binder_buffer *buffer)
+{
+ seq_printf(m, "%s %d: %p size %zd:%zd %s\n",
+ prefix, buffer->debug_id, buffer->data,
+ buffer->data_size, buffer->offsets_size,
+ buffer->transaction ? "active" : "delivered");
+}
+
+static void print_binder_work(struct seq_file *m, const char *prefix,
+ const char *transaction_prefix,
+ struct binder_work *w)
+{
+ struct binder_node *node;
+ struct binder_transaction *t;
+
+ switch (w->type) {
+ case BINDER_WORK_TRANSACTION:
+ t = container_of(w, struct binder_transaction, work);
+ print_binder_transaction(m, transaction_prefix, t);
+ break;
+ case BINDER_WORK_TRANSACTION_COMPLETE:
+ seq_printf(m, "%stransaction complete\n", prefix);
+ break;
+ case BINDER_WORK_NODE:
+ node = container_of(w, struct binder_node, work);
+ seq_printf(m, "%snode work %d: u%016llx c%016llx\n",
+ prefix, node->debug_id,
+ (u64)node->ptr, (u64)node->cookie);
+ break;
+ case BINDER_WORK_DEAD_BINDER:
+ seq_printf(m, "%shas dead binder\n", prefix);
+ break;
+ case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
+ seq_printf(m, "%shas cleared dead binder\n", prefix);
+ break;
+ case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
+ seq_printf(m, "%shas cleared death notification\n", prefix);
+ break;
+ default:
+ seq_printf(m, "%sunknown work: type %d\n", prefix, w->type);
+ break;
+ }
+}
+
+static void print_binder_thread(struct seq_file *m,
+ struct binder_thread *thread,
+ int print_always)
+{
+ struct binder_transaction *t;
+ struct binder_work *w;
+ size_t start_pos = m->count;
+ size_t header_pos;
+
+ seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper);
+ header_pos = m->count;
+ t = thread->transaction_stack;
+ while (t) {
+ if (t->from == thread) {
+ print_binder_transaction(m,
+ " outgoing transaction", t);
+ t = t->from_parent;
+ } else if (t->to_thread == thread) {
+ print_binder_transaction(m,
+ " incoming transaction", t);
+ t = t->to_parent;
+ } else {
+ print_binder_transaction(m, " bad transaction", t);
+ t = NULL;
+ }
+ }
+ list_for_each_entry(w, &thread->todo, entry) {
+ print_binder_work(m, " ", " pending transaction", w);
+ }
+ if (!print_always && m->count == header_pos)
+ m->count = start_pos;
+}
+
+static void print_binder_node(struct seq_file *m, struct binder_node *node)
+{
+ struct binder_ref *ref;
+ struct binder_work *w;
+ int count;
+
+ count = 0;
+ hlist_for_each_entry(ref, &node->refs, node_entry)
+ count++;
+
+ seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d",
+ node->debug_id, (u64)node->ptr, (u64)node->cookie,
+ node->has_strong_ref, node->has_weak_ref,
+ node->local_strong_refs, node->local_weak_refs,
+ node->internal_strong_refs, count);
+ if (count) {
+ seq_puts(m, " proc");
+ hlist_for_each_entry(ref, &node->refs, node_entry)
+ seq_printf(m, " %d", ref->proc->pid);
+ }
+ seq_puts(m, "\n");
+ list_for_each_entry(w, &node->async_todo, entry)
+ print_binder_work(m, " ",
+ " pending async transaction", w);
+}
+
+static void print_binder_ref(struct seq_file *m, struct binder_ref *ref)
+{
+ seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n",
+ ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ",
+ ref->node->debug_id, ref->strong, ref->weak, ref->death);
+}
+
+static void print_binder_proc(struct seq_file *m,
+ struct binder_proc *proc, int print_all)
+{
+ struct binder_work *w;
+ struct rb_node *n;
+ size_t start_pos = m->count;
+ size_t header_pos;
+
+ seq_printf(m, "proc %d\n", proc->pid);
+ header_pos = m->count;
+
+ for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
+ print_binder_thread(m, rb_entry(n, struct binder_thread,
+ rb_node), print_all);
+ for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
+ struct binder_node *node = rb_entry(n, struct binder_node,
+ rb_node);
+ if (print_all || node->has_async_transaction)
+ print_binder_node(m, node);
+ }
+ if (print_all) {
+ for (n = rb_first(&proc->refs_by_desc);
+ n != NULL;
+ n = rb_next(n))
+ print_binder_ref(m, rb_entry(n, struct binder_ref,
+ rb_node_desc));
+ }
+ for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
+ print_binder_buffer(m, " buffer",
+ rb_entry(n, struct binder_buffer, rb_node));
+ list_for_each_entry(w, &proc->todo, entry)
+ print_binder_work(m, " ", " pending transaction", w);
+ list_for_each_entry(w, &proc->delivered_death, entry) {
+ seq_puts(m, " has delivered dead binder\n");
+ break;
+ }
+ if (!print_all && m->count == header_pos)
+ m->count = start_pos;
+}
+
+static const char * const binder_return_strings[] = {
+ "BR_ERROR",
+ "BR_OK",
+ "BR_TRANSACTION",
+ "BR_REPLY",
+ "BR_ACQUIRE_RESULT",
+ "BR_DEAD_REPLY",
+ "BR_TRANSACTION_COMPLETE",
+ "BR_INCREFS",
+ "BR_ACQUIRE",
+ "BR_RELEASE",
+ "BR_DECREFS",
+ "BR_ATTEMPT_ACQUIRE",
+ "BR_NOOP",
+ "BR_SPAWN_LOOPER",
+ "BR_FINISHED",
+ "BR_DEAD_BINDER",
+ "BR_CLEAR_DEATH_NOTIFICATION_DONE",
+ "BR_FAILED_REPLY"
+};
+
+static const char * const binder_command_strings[] = {
+ "BC_TRANSACTION",
+ "BC_REPLY",
+ "BC_ACQUIRE_RESULT",
+ "BC_FREE_BUFFER",
+ "BC_INCREFS",
+ "BC_ACQUIRE",
+ "BC_RELEASE",
+ "BC_DECREFS",
+ "BC_INCREFS_DONE",
+ "BC_ACQUIRE_DONE",
+ "BC_ATTEMPT_ACQUIRE",
+ "BC_REGISTER_LOOPER",
+ "BC_ENTER_LOOPER",
+ "BC_EXIT_LOOPER",
+ "BC_REQUEST_DEATH_NOTIFICATION",
+ "BC_CLEAR_DEATH_NOTIFICATION",
+ "BC_DEAD_BINDER_DONE"
+};
+
+static const char * const binder_objstat_strings[] = {
+ "proc",
+ "thread",
+ "node",
+ "ref",
+ "death",
+ "transaction",
+ "transaction_complete"
+};
+
+static void print_binder_stats(struct seq_file *m, const char *prefix,
+ struct binder_stats *stats)
+{
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(stats->bc) !=
+ ARRAY_SIZE(binder_command_strings));
+ for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
+ if (stats->bc[i])
+ seq_printf(m, "%s%s: %d\n", prefix,
+ binder_command_strings[i], stats->bc[i]);
+ }
+
+ BUILD_BUG_ON(ARRAY_SIZE(stats->br) !=
+ ARRAY_SIZE(binder_return_strings));
+ for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
+ if (stats->br[i])
+ seq_printf(m, "%s%s: %d\n", prefix,
+ binder_return_strings[i], stats->br[i]);
+ }
+
+ BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
+ ARRAY_SIZE(binder_objstat_strings));
+ BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
+ ARRAY_SIZE(stats->obj_deleted));
+ for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
+ if (stats->obj_created[i] || stats->obj_deleted[i])
+ seq_printf(m, "%s%s: active %d total %d\n", prefix,
+ binder_objstat_strings[i],
+ stats->obj_created[i] - stats->obj_deleted[i],
+ stats->obj_created[i]);
+ }
+}
+
+static void print_binder_proc_stats(struct seq_file *m,
+ struct binder_proc *proc)
+{
+ struct binder_work *w;
+ struct rb_node *n;
+ int count, strong, weak;
+
+ seq_printf(m, "proc %d\n", proc->pid);
+ count = 0;
+ for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
+ count++;
+ seq_printf(m, " threads: %d\n", count);
+ seq_printf(m, " requested threads: %d+%d/%d\n"
+ " ready threads %d\n"
+ " free async space %zd\n", proc->requested_threads,
+ proc->requested_threads_started, proc->max_threads,
+ proc->ready_threads, proc->free_async_space);
+ count = 0;
+ for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
+ count++;
+ seq_printf(m, " nodes: %d\n", count);
+ count = 0;
+ strong = 0;
+ weak = 0;
+ for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
+ struct binder_ref *ref = rb_entry(n, struct binder_ref,
+ rb_node_desc);
+ count++;
+ strong += ref->strong;
+ weak += ref->weak;
+ }
+ seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak);
+
+ count = 0;
+ for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
+ count++;
+ seq_printf(m, " buffers: %d\n", count);
+
+ count = 0;
+ list_for_each_entry(w, &proc->todo, entry) {
+ switch (w->type) {
+ case BINDER_WORK_TRANSACTION:
+ count++;
+ break;
+ default:
+ break;
+ }
+ }
+ seq_printf(m, " pending transactions: %d\n", count);
+
+ print_binder_stats(m, " ", &proc->stats);
+}
+
+
+static int binder_state_show(struct seq_file *m, void *unused)
+{
+ struct binder_proc *proc;
+ struct binder_node *node;
+ int do_lock = !binder_debug_no_lock;
+
+ if (do_lock)
+ binder_lock(__func__);
+
+ seq_puts(m, "binder state:\n");
+
+ if (!hlist_empty(&binder_dead_nodes))
+ seq_puts(m, "dead nodes:\n");
+ hlist_for_each_entry(node, &binder_dead_nodes, dead_node)
+ print_binder_node(m, node);
+
+ hlist_for_each_entry(proc, &binder_procs, proc_node)
+ print_binder_proc(m, proc, 1);
+ if (do_lock)
+ binder_unlock(__func__);
+ return 0;
+}
+
+static int binder_stats_show(struct seq_file *m, void *unused)
+{
+ struct binder_proc *proc;
+ int do_lock = !binder_debug_no_lock;
+
+ if (do_lock)
+ binder_lock(__func__);
+
+ seq_puts(m, "binder stats:\n");
+
+ print_binder_stats(m, "", &binder_stats);
+
+ hlist_for_each_entry(proc, &binder_procs, proc_node)
+ print_binder_proc_stats(m, proc);
+ if (do_lock)
+ binder_unlock(__func__);
+ return 0;
+}
+
+static int binder_transactions_show(struct seq_file *m, void *unused)
+{
+ struct binder_proc *proc;
+ int do_lock = !binder_debug_no_lock;
+
+ if (do_lock)
+ binder_lock(__func__);
+
+ seq_puts(m, "binder transactions:\n");
+ hlist_for_each_entry(proc, &binder_procs, proc_node)
+ print_binder_proc(m, proc, 0);
+ if (do_lock)
+ binder_unlock(__func__);
+ return 0;
+}
+
+static int binder_proc_show(struct seq_file *m, void *unused)
+{
+ struct binder_proc *proc = m->private;
+ int do_lock = !binder_debug_no_lock;
+
+ if (do_lock)
+ binder_lock(__func__);
+ seq_puts(m, "binder proc state:\n");
+ print_binder_proc(m, proc, 1);
+ if (do_lock)
+ binder_unlock(__func__);
+ return 0;
+}
+
+static void print_binder_transaction_log_entry(struct seq_file *m,
+ struct binder_transaction_log_entry *e)
+{
+ seq_printf(m,
+ "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n",
+ e->debug_id, (e->call_type == 2) ? "reply" :
+ ((e->call_type == 1) ? "async" : "call "), e->from_proc,
+ e->from_thread, e->to_proc, e->to_thread, e->to_node,
+ e->target_handle, e->data_size, e->offsets_size);
+}
+
+static int binder_transaction_log_show(struct seq_file *m, void *unused)
+{
+ struct binder_transaction_log *log = m->private;
+ int i;
+
+ if (log->full) {
+ for (i = log->next; i < ARRAY_SIZE(log->entry); i++)
+ print_binder_transaction_log_entry(m, &log->entry[i]);
+ }
+ for (i = 0; i < log->next; i++)
+ print_binder_transaction_log_entry(m, &log->entry[i]);
+ return 0;
+}
+
+static const struct file_operations binder_fops = {
+ .owner = THIS_MODULE,
+ .poll = binder_poll,
+ .unlocked_ioctl = binder_ioctl,
+ .compat_ioctl = binder_ioctl,
+ .mmap = binder_mmap,
+ .open = binder_open,
+ .flush = binder_flush,
+ .release = binder_release,
+};
+
+static struct miscdevice binder_miscdev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "binder",
+ .fops = &binder_fops
+};
+
+BINDER_DEBUG_ENTRY(state);
+BINDER_DEBUG_ENTRY(stats);
+BINDER_DEBUG_ENTRY(transactions);
+BINDER_DEBUG_ENTRY(transaction_log);
+
+static int __init binder_init(void)
+{
+ int ret;
+
+ binder_deferred_workqueue = create_singlethread_workqueue("binder");
+ if (!binder_deferred_workqueue)
+ return -ENOMEM;
+
+ binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL);
+ if (binder_debugfs_dir_entry_root)
+ binder_debugfs_dir_entry_proc = debugfs_create_dir("proc",
+ binder_debugfs_dir_entry_root);
+ ret = misc_register(&binder_miscdev);
+ if (binder_debugfs_dir_entry_root) {
+ debugfs_create_file("state",
+ S_IRUGO,
+ binder_debugfs_dir_entry_root,
+ NULL,
+ &binder_state_fops);
+ debugfs_create_file("stats",
+ S_IRUGO,
+ binder_debugfs_dir_entry_root,
+ NULL,
+ &binder_stats_fops);
+ debugfs_create_file("transactions",
+ S_IRUGO,
+ binder_debugfs_dir_entry_root,
+ NULL,
+ &binder_transactions_fops);
+ debugfs_create_file("transaction_log",
+ S_IRUGO,
+ binder_debugfs_dir_entry_root,
+ &binder_transaction_log,
+ &binder_transaction_log_fops);
+ debugfs_create_file("failed_transaction_log",
+ S_IRUGO,
+ binder_debugfs_dir_entry_root,
+ &binder_transaction_log_failed,
+ &binder_transaction_log_fops);
+ }
+ return ret;
+}
+
+device_initcall(binder_init);
+
+#define CREATE_TRACE_POINTS
+#include "binder_trace.h"
+
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * Based on, but no longer compatible with, the original
+ * OpenBinder.org binder driver interface, which is:
+ *
+ * Copyright (c) 2005 Palmsource, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_BINDER_H
+#define _LINUX_BINDER_H
+
+#ifdef CONFIG_ANDROID_BINDER_IPC_32BIT
+#define BINDER_IPC_32BIT 1
+#endif
+
+#include <uapi/linux/android/binder.h>
+
+#endif /* _LINUX_BINDER_H */
+
--- /dev/null
+/*
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM binder
+
+#if !defined(_BINDER_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _BINDER_TRACE_H
+
+#include <linux/tracepoint.h>
+
+struct binder_buffer;
+struct binder_node;
+struct binder_proc;
+struct binder_ref;
+struct binder_thread;
+struct binder_transaction;
+
+TRACE_EVENT(binder_ioctl,
+ TP_PROTO(unsigned int cmd, unsigned long arg),
+ TP_ARGS(cmd, arg),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, cmd)
+ __field(unsigned long, arg)
+ ),
+ TP_fast_assign(
+ __entry->cmd = cmd;
+ __entry->arg = arg;
+ ),
+ TP_printk("cmd=0x%x arg=0x%lx", __entry->cmd, __entry->arg)
+);
+
+DECLARE_EVENT_CLASS(binder_lock_class,
+ TP_PROTO(const char *tag),
+ TP_ARGS(tag),
+ TP_STRUCT__entry(
+ __field(const char *, tag)
+ ),
+ TP_fast_assign(
+ __entry->tag = tag;
+ ),
+ TP_printk("tag=%s", __entry->tag)
+);
+
+#define DEFINE_BINDER_LOCK_EVENT(name) \
+DEFINE_EVENT(binder_lock_class, name, \
+ TP_PROTO(const char *func), \
+ TP_ARGS(func))
+
+DEFINE_BINDER_LOCK_EVENT(binder_lock);
+DEFINE_BINDER_LOCK_EVENT(binder_locked);
+DEFINE_BINDER_LOCK_EVENT(binder_unlock);
+
+DECLARE_EVENT_CLASS(binder_function_return_class,
+ TP_PROTO(int ret),
+ TP_ARGS(ret),
+ TP_STRUCT__entry(
+ __field(int, ret)
+ ),
+ TP_fast_assign(
+ __entry->ret = ret;
+ ),
+ TP_printk("ret=%d", __entry->ret)
+);
+
+#define DEFINE_BINDER_FUNCTION_RETURN_EVENT(name) \
+DEFINE_EVENT(binder_function_return_class, name, \
+ TP_PROTO(int ret), \
+ TP_ARGS(ret))
+
+DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_ioctl_done);
+DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_write_done);
+DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_read_done);
+
+TRACE_EVENT(binder_wait_for_work,
+ TP_PROTO(bool proc_work, bool transaction_stack, bool thread_todo),
+ TP_ARGS(proc_work, transaction_stack, thread_todo),
+
+ TP_STRUCT__entry(
+ __field(bool, proc_work)
+ __field(bool, transaction_stack)
+ __field(bool, thread_todo)
+ ),
+ TP_fast_assign(
+ __entry->proc_work = proc_work;
+ __entry->transaction_stack = transaction_stack;
+ __entry->thread_todo = thread_todo;
+ ),
+ TP_printk("proc_work=%d transaction_stack=%d thread_todo=%d",
+ __entry->proc_work, __entry->transaction_stack,
+ __entry->thread_todo)
+);
+
+TRACE_EVENT(binder_transaction,
+ TP_PROTO(bool reply, struct binder_transaction *t,
+ struct binder_node *target_node),
+ TP_ARGS(reply, t, target_node),
+ TP_STRUCT__entry(
+ __field(int, debug_id)
+ __field(int, target_node)
+ __field(int, to_proc)
+ __field(int, to_thread)
+ __field(int, reply)
+ __field(unsigned int, code)
+ __field(unsigned int, flags)
+ ),
+ TP_fast_assign(
+ __entry->debug_id = t->debug_id;
+ __entry->target_node = target_node ? target_node->debug_id : 0;
+ __entry->to_proc = t->to_proc->pid;
+ __entry->to_thread = t->to_thread ? t->to_thread->pid : 0;
+ __entry->reply = reply;
+ __entry->code = t->code;
+ __entry->flags = t->flags;
+ ),
+ TP_printk("transaction=%d dest_node=%d dest_proc=%d dest_thread=%d reply=%d flags=0x%x code=0x%x",
+ __entry->debug_id, __entry->target_node,
+ __entry->to_proc, __entry->to_thread,
+ __entry->reply, __entry->flags, __entry->code)
+);
+
+TRACE_EVENT(binder_transaction_received,
+ TP_PROTO(struct binder_transaction *t),
+ TP_ARGS(t),
+
+ TP_STRUCT__entry(
+ __field(int, debug_id)
+ ),
+ TP_fast_assign(
+ __entry->debug_id = t->debug_id;
+ ),
+ TP_printk("transaction=%d", __entry->debug_id)
+);
+
+TRACE_EVENT(binder_transaction_node_to_ref,
+ TP_PROTO(struct binder_transaction *t, struct binder_node *node,
+ struct binder_ref *ref),
+ TP_ARGS(t, node, ref),
+
+ TP_STRUCT__entry(
+ __field(int, debug_id)
+ __field(int, node_debug_id)
+ __field(binder_uintptr_t, node_ptr)
+ __field(int, ref_debug_id)
+ __field(uint32_t, ref_desc)
+ ),
+ TP_fast_assign(
+ __entry->debug_id = t->debug_id;
+ __entry->node_debug_id = node->debug_id;
+ __entry->node_ptr = node->ptr;
+ __entry->ref_debug_id = ref->debug_id;
+ __entry->ref_desc = ref->desc;
+ ),
+ TP_printk("transaction=%d node=%d src_ptr=0x%016llx ==> dest_ref=%d dest_desc=%d",
+ __entry->debug_id, __entry->node_debug_id,
+ (u64)__entry->node_ptr,
+ __entry->ref_debug_id, __entry->ref_desc)
+);
+
+TRACE_EVENT(binder_transaction_ref_to_node,
+ TP_PROTO(struct binder_transaction *t, struct binder_ref *ref),
+ TP_ARGS(t, ref),
+
+ TP_STRUCT__entry(
+ __field(int, debug_id)
+ __field(int, ref_debug_id)
+ __field(uint32_t, ref_desc)
+ __field(int, node_debug_id)
+ __field(binder_uintptr_t, node_ptr)
+ ),
+ TP_fast_assign(
+ __entry->debug_id = t->debug_id;
+ __entry->ref_debug_id = ref->debug_id;
+ __entry->ref_desc = ref->desc;
+ __entry->node_debug_id = ref->node->debug_id;
+ __entry->node_ptr = ref->node->ptr;
+ ),
+ TP_printk("transaction=%d node=%d src_ref=%d src_desc=%d ==> dest_ptr=0x%016llx",
+ __entry->debug_id, __entry->node_debug_id,
+ __entry->ref_debug_id, __entry->ref_desc,
+ (u64)__entry->node_ptr)
+);
+
+TRACE_EVENT(binder_transaction_ref_to_ref,
+ TP_PROTO(struct binder_transaction *t, struct binder_ref *src_ref,
+ struct binder_ref *dest_ref),
+ TP_ARGS(t, src_ref, dest_ref),
+
+ TP_STRUCT__entry(
+ __field(int, debug_id)
+ __field(int, node_debug_id)
+ __field(int, src_ref_debug_id)
+ __field(uint32_t, src_ref_desc)
+ __field(int, dest_ref_debug_id)
+ __field(uint32_t, dest_ref_desc)
+ ),
+ TP_fast_assign(
+ __entry->debug_id = t->debug_id;
+ __entry->node_debug_id = src_ref->node->debug_id;
+ __entry->src_ref_debug_id = src_ref->debug_id;
+ __entry->src_ref_desc = src_ref->desc;
+ __entry->dest_ref_debug_id = dest_ref->debug_id;
+ __entry->dest_ref_desc = dest_ref->desc;
+ ),
+ TP_printk("transaction=%d node=%d src_ref=%d src_desc=%d ==> dest_ref=%d dest_desc=%d",
+ __entry->debug_id, __entry->node_debug_id,
+ __entry->src_ref_debug_id, __entry->src_ref_desc,
+ __entry->dest_ref_debug_id, __entry->dest_ref_desc)
+);
+
+TRACE_EVENT(binder_transaction_fd,
+ TP_PROTO(struct binder_transaction *t, int src_fd, int dest_fd),
+ TP_ARGS(t, src_fd, dest_fd),
+
+ TP_STRUCT__entry(
+ __field(int, debug_id)
+ __field(int, src_fd)
+ __field(int, dest_fd)
+ ),
+ TP_fast_assign(
+ __entry->debug_id = t->debug_id;
+ __entry->src_fd = src_fd;
+ __entry->dest_fd = dest_fd;
+ ),
+ TP_printk("transaction=%d src_fd=%d ==> dest_fd=%d",
+ __entry->debug_id, __entry->src_fd, __entry->dest_fd)
+);
+
+DECLARE_EVENT_CLASS(binder_buffer_class,
+ TP_PROTO(struct binder_buffer *buf),
+ TP_ARGS(buf),
+ TP_STRUCT__entry(
+ __field(int, debug_id)
+ __field(size_t, data_size)
+ __field(size_t, offsets_size)
+ ),
+ TP_fast_assign(
+ __entry->debug_id = buf->debug_id;
+ __entry->data_size = buf->data_size;
+ __entry->offsets_size = buf->offsets_size;
+ ),
+ TP_printk("transaction=%d data_size=%zd offsets_size=%zd",
+ __entry->debug_id, __entry->data_size, __entry->offsets_size)
+);
+
+DEFINE_EVENT(binder_buffer_class, binder_transaction_alloc_buf,
+ TP_PROTO(struct binder_buffer *buffer),
+ TP_ARGS(buffer));
+
+DEFINE_EVENT(binder_buffer_class, binder_transaction_buffer_release,
+ TP_PROTO(struct binder_buffer *buffer),
+ TP_ARGS(buffer));
+
+DEFINE_EVENT(binder_buffer_class, binder_transaction_failed_buffer_release,
+ TP_PROTO(struct binder_buffer *buffer),
+ TP_ARGS(buffer));
+
+TRACE_EVENT(binder_update_page_range,
+ TP_PROTO(struct binder_proc *proc, bool allocate,
+ void *start, void *end),
+ TP_ARGS(proc, allocate, start, end),
+ TP_STRUCT__entry(
+ __field(int, proc)
+ __field(bool, allocate)
+ __field(size_t, offset)
+ __field(size_t, size)
+ ),
+ TP_fast_assign(
+ __entry->proc = proc->pid;
+ __entry->allocate = allocate;
+ __entry->offset = start - proc->buffer;
+ __entry->size = end - start;
+ ),
+ TP_printk("proc=%d allocate=%d offset=%zu size=%zu",
+ __entry->proc, __entry->allocate,
+ __entry->offset, __entry->size)
+);
+
+TRACE_EVENT(binder_command,
+ TP_PROTO(uint32_t cmd),
+ TP_ARGS(cmd),
+ TP_STRUCT__entry(
+ __field(uint32_t, cmd)
+ ),
+ TP_fast_assign(
+ __entry->cmd = cmd;
+ ),
+ TP_printk("cmd=0x%x %s",
+ __entry->cmd,
+ _IOC_NR(__entry->cmd) < ARRAY_SIZE(binder_command_strings) ?
+ binder_command_strings[_IOC_NR(__entry->cmd)] :
+ "unknown")
+);
+
+TRACE_EVENT(binder_return,
+ TP_PROTO(uint32_t cmd),
+ TP_ARGS(cmd),
+ TP_STRUCT__entry(
+ __field(uint32_t, cmd)
+ ),
+ TP_fast_assign(
+ __entry->cmd = cmd;
+ ),
+ TP_printk("cmd=0x%x %s",
+ __entry->cmd,
+ _IOC_NR(__entry->cmd) < ARRAY_SIZE(binder_return_strings) ?
+ binder_return_strings[_IOC_NR(__entry->cmd)] :
+ "unknown")
+);
+
+#endif /* _BINDER_TRACE_H */
+
+#undef TRACE_INCLUDE_PATH
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_FILE binder_trace
+#include <trace/define_trace.h>
menu "Android"
-config ANDROID
- bool "Android Drivers"
- ---help---
- Enable support for various drivers needed on the Android platform
-
if ANDROID
-config ANDROID_BINDER_IPC
- bool "Android Binder IPC Driver"
- depends on MMU
- default n
- ---help---
- Binder is used in Android for both communication between processes,
- and remote method invocation.
-
- This means one Android process can call a method/routine in another
- Android process, using Binder to identify, invoke and pass arguments
- between said processes.
-
-config ANDROID_BINDER_IPC_32BIT
- bool
- depends on !64BIT && ANDROID_BINDER_IPC
- default y
- ---help---
- The Binder API has been changed to support both 32 and 64bit
- applications in a mixed environment.
-
- Enable this to support an old 32-bit Android user-space (v4.4 and
- earlier).
-
- Note that enabling this will break newer Android user-space.
-
config ASHMEM
bool "Enable the Anonymous Shared Memory Subsystem"
default n
obj-y += ion/
-obj-$(CONFIG_ANDROID_BINDER_IPC) += binder.o
obj-$(CONFIG_ASHMEM) += ashmem.o
obj-$(CONFIG_ANDROID_LOGGER) += logger.o
obj-$(CONFIG_ANDROID_TIMED_OUTPUT) += timed_output.o
+++ /dev/null
-/* binder.c
- *
- * Android IPC Subsystem
- *
- * Copyright (C) 2007-2008 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <asm/cacheflush.h>
-#include <linux/fdtable.h>
-#include <linux/file.h>
-#include <linux/freezer.h>
-#include <linux/fs.h>
-#include <linux/list.h>
-#include <linux/miscdevice.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/nsproxy.h>
-#include <linux/poll.h>
-#include <linux/debugfs.h>
-#include <linux/rbtree.h>
-#include <linux/sched.h>
-#include <linux/seq_file.h>
-#include <linux/uaccess.h>
-#include <linux/vmalloc.h>
-#include <linux/slab.h>
-#include <linux/pid_namespace.h>
-
-#include "binder.h"
-#include "binder_trace.h"
-
-static DEFINE_MUTEX(binder_main_lock);
-static DEFINE_MUTEX(binder_deferred_lock);
-static DEFINE_MUTEX(binder_mmap_lock);
-
-static HLIST_HEAD(binder_procs);
-static HLIST_HEAD(binder_deferred_list);
-static HLIST_HEAD(binder_dead_nodes);
-
-static struct dentry *binder_debugfs_dir_entry_root;
-static struct dentry *binder_debugfs_dir_entry_proc;
-static struct binder_node *binder_context_mgr_node;
-static kuid_t binder_context_mgr_uid = INVALID_UID;
-static int binder_last_id;
-static struct workqueue_struct *binder_deferred_workqueue;
-
-#define BINDER_DEBUG_ENTRY(name) \
-static int binder_##name##_open(struct inode *inode, struct file *file) \
-{ \
- return single_open(file, binder_##name##_show, inode->i_private); \
-} \
-\
-static const struct file_operations binder_##name##_fops = { \
- .owner = THIS_MODULE, \
- .open = binder_##name##_open, \
- .read = seq_read, \
- .llseek = seq_lseek, \
- .release = single_release, \
-}
-
-static int binder_proc_show(struct seq_file *m, void *unused);
-BINDER_DEBUG_ENTRY(proc);
-
-/* This is only defined in include/asm-arm/sizes.h */
-#ifndef SZ_1K
-#define SZ_1K 0x400
-#endif
-
-#ifndef SZ_4M
-#define SZ_4M 0x400000
-#endif
-
-#define FORBIDDEN_MMAP_FLAGS (VM_WRITE)
-
-#define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64)
-
-enum {
- BINDER_DEBUG_USER_ERROR = 1U << 0,
- BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1,
- BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2,
- BINDER_DEBUG_OPEN_CLOSE = 1U << 3,
- BINDER_DEBUG_DEAD_BINDER = 1U << 4,
- BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5,
- BINDER_DEBUG_READ_WRITE = 1U << 6,
- BINDER_DEBUG_USER_REFS = 1U << 7,
- BINDER_DEBUG_THREADS = 1U << 8,
- BINDER_DEBUG_TRANSACTION = 1U << 9,
- BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10,
- BINDER_DEBUG_FREE_BUFFER = 1U << 11,
- BINDER_DEBUG_INTERNAL_REFS = 1U << 12,
- BINDER_DEBUG_BUFFER_ALLOC = 1U << 13,
- BINDER_DEBUG_PRIORITY_CAP = 1U << 14,
- BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15,
-};
-static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
- BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
-module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
-
-static bool binder_debug_no_lock;
-module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
-
-static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
-static int binder_stop_on_user_error;
-
-static int binder_set_stop_on_user_error(const char *val,
- struct kernel_param *kp)
-{
- int ret;
-
- ret = param_set_int(val, kp);
- if (binder_stop_on_user_error < 2)
- wake_up(&binder_user_error_wait);
- return ret;
-}
-module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
- param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO);
-
-#define binder_debug(mask, x...) \
- do { \
- if (binder_debug_mask & mask) \
- pr_info(x); \
- } while (0)
-
-#define binder_user_error(x...) \
- do { \
- if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
- pr_info(x); \
- if (binder_stop_on_user_error) \
- binder_stop_on_user_error = 2; \
- } while (0)
-
-enum binder_stat_types {
- BINDER_STAT_PROC,
- BINDER_STAT_THREAD,
- BINDER_STAT_NODE,
- BINDER_STAT_REF,
- BINDER_STAT_DEATH,
- BINDER_STAT_TRANSACTION,
- BINDER_STAT_TRANSACTION_COMPLETE,
- BINDER_STAT_COUNT
-};
-
-struct binder_stats {
- int br[_IOC_NR(BR_FAILED_REPLY) + 1];
- int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
- int obj_created[BINDER_STAT_COUNT];
- int obj_deleted[BINDER_STAT_COUNT];
-};
-
-static struct binder_stats binder_stats;
-
-static inline void binder_stats_deleted(enum binder_stat_types type)
-{
- binder_stats.obj_deleted[type]++;
-}
-
-static inline void binder_stats_created(enum binder_stat_types type)
-{
- binder_stats.obj_created[type]++;
-}
-
-struct binder_transaction_log_entry {
- int debug_id;
- int call_type;
- int from_proc;
- int from_thread;
- int target_handle;
- int to_proc;
- int to_thread;
- int to_node;
- int data_size;
- int offsets_size;
-};
-struct binder_transaction_log {
- int next;
- int full;
- struct binder_transaction_log_entry entry[32];
-};
-static struct binder_transaction_log binder_transaction_log;
-static struct binder_transaction_log binder_transaction_log_failed;
-
-static struct binder_transaction_log_entry *binder_transaction_log_add(
- struct binder_transaction_log *log)
-{
- struct binder_transaction_log_entry *e;
-
- e = &log->entry[log->next];
- memset(e, 0, sizeof(*e));
- log->next++;
- if (log->next == ARRAY_SIZE(log->entry)) {
- log->next = 0;
- log->full = 1;
- }
- return e;
-}
-
-struct binder_work {
- struct list_head entry;
- enum {
- BINDER_WORK_TRANSACTION = 1,
- BINDER_WORK_TRANSACTION_COMPLETE,
- BINDER_WORK_NODE,
- BINDER_WORK_DEAD_BINDER,
- BINDER_WORK_DEAD_BINDER_AND_CLEAR,
- BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
- } type;
-};
-
-struct binder_node {
- int debug_id;
- struct binder_work work;
- union {
- struct rb_node rb_node;
- struct hlist_node dead_node;
- };
- struct binder_proc *proc;
- struct hlist_head refs;
- int internal_strong_refs;
- int local_weak_refs;
- int local_strong_refs;
- binder_uintptr_t ptr;
- binder_uintptr_t cookie;
- unsigned has_strong_ref:1;
- unsigned pending_strong_ref:1;
- unsigned has_weak_ref:1;
- unsigned pending_weak_ref:1;
- unsigned has_async_transaction:1;
- unsigned accept_fds:1;
- unsigned min_priority:8;
- struct list_head async_todo;
-};
-
-struct binder_ref_death {
- struct binder_work work;
- binder_uintptr_t cookie;
-};
-
-struct binder_ref {
- /* Lookups needed: */
- /* node + proc => ref (transaction) */
- /* desc + proc => ref (transaction, inc/dec ref) */
- /* node => refs + procs (proc exit) */
- int debug_id;
- struct rb_node rb_node_desc;
- struct rb_node rb_node_node;
- struct hlist_node node_entry;
- struct binder_proc *proc;
- struct binder_node *node;
- uint32_t desc;
- int strong;
- int weak;
- struct binder_ref_death *death;
-};
-
-struct binder_buffer {
- struct list_head entry; /* free and allocated entries by address */
- struct rb_node rb_node; /* free entry by size or allocated entry */
- /* by address */
- unsigned free:1;
- unsigned allow_user_free:1;
- unsigned async_transaction:1;
- unsigned debug_id:29;
-
- struct binder_transaction *transaction;
-
- struct binder_node *target_node;
- size_t data_size;
- size_t offsets_size;
- uint8_t data[0];
-};
-
-enum binder_deferred_state {
- BINDER_DEFERRED_PUT_FILES = 0x01,
- BINDER_DEFERRED_FLUSH = 0x02,
- BINDER_DEFERRED_RELEASE = 0x04,
-};
-
-struct binder_proc {
- struct hlist_node proc_node;
- struct rb_root threads;
- struct rb_root nodes;
- struct rb_root refs_by_desc;
- struct rb_root refs_by_node;
- int pid;
- struct vm_area_struct *vma;
- struct mm_struct *vma_vm_mm;
- struct task_struct *tsk;
- struct files_struct *files;
- struct hlist_node deferred_work_node;
- int deferred_work;
- void *buffer;
- ptrdiff_t user_buffer_offset;
-
- struct list_head buffers;
- struct rb_root free_buffers;
- struct rb_root allocated_buffers;
- size_t free_async_space;
-
- struct page **pages;
- size_t buffer_size;
- uint32_t buffer_free;
- struct list_head todo;
- wait_queue_head_t wait;
- struct binder_stats stats;
- struct list_head delivered_death;
- int max_threads;
- int requested_threads;
- int requested_threads_started;
- int ready_threads;
- long default_priority;
- struct dentry *debugfs_entry;
-};
-
-enum {
- BINDER_LOOPER_STATE_REGISTERED = 0x01,
- BINDER_LOOPER_STATE_ENTERED = 0x02,
- BINDER_LOOPER_STATE_EXITED = 0x04,
- BINDER_LOOPER_STATE_INVALID = 0x08,
- BINDER_LOOPER_STATE_WAITING = 0x10,
- BINDER_LOOPER_STATE_NEED_RETURN = 0x20
-};
-
-struct binder_thread {
- struct binder_proc *proc;
- struct rb_node rb_node;
- int pid;
- int looper;
- struct binder_transaction *transaction_stack;
- struct list_head todo;
- uint32_t return_error; /* Write failed, return error code in read buf */
- uint32_t return_error2; /* Write failed, return error code in read */
- /* buffer. Used when sending a reply to a dead process that */
- /* we are also waiting on */
- wait_queue_head_t wait;
- struct binder_stats stats;
-};
-
-struct binder_transaction {
- int debug_id;
- struct binder_work work;
- struct binder_thread *from;
- struct binder_transaction *from_parent;
- struct binder_proc *to_proc;
- struct binder_thread *to_thread;
- struct binder_transaction *to_parent;
- unsigned need_reply:1;
- /* unsigned is_dead:1; */ /* not used at the moment */
-
- struct binder_buffer *buffer;
- unsigned int code;
- unsigned int flags;
- long priority;
- long saved_priority;
- kuid_t sender_euid;
-};
-
-static void
-binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
-
-static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
-{
- struct files_struct *files = proc->files;
- unsigned long rlim_cur;
- unsigned long irqs;
-
- if (files == NULL)
- return -ESRCH;
-
- if (!lock_task_sighand(proc->tsk, &irqs))
- return -EMFILE;
-
- rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE);
- unlock_task_sighand(proc->tsk, &irqs);
-
- return __alloc_fd(files, 0, rlim_cur, flags);
-}
-
-/*
- * copied from fd_install
- */
-static void task_fd_install(
- struct binder_proc *proc, unsigned int fd, struct file *file)
-{
- if (proc->files)
- __fd_install(proc->files, fd, file);
-}
-
-/*
- * copied from sys_close
- */
-static long task_close_fd(struct binder_proc *proc, unsigned int fd)
-{
- int retval;
-
- if (proc->files == NULL)
- return -ESRCH;
-
- retval = __close_fd(proc->files, fd);
- /* can't restart close syscall because file table entry was cleared */
- if (unlikely(retval == -ERESTARTSYS ||
- retval == -ERESTARTNOINTR ||
- retval == -ERESTARTNOHAND ||
- retval == -ERESTART_RESTARTBLOCK))
- retval = -EINTR;
-
- return retval;
-}
-
-static inline void binder_lock(const char *tag)
-{
- trace_binder_lock(tag);
- mutex_lock(&binder_main_lock);
- trace_binder_locked(tag);
-}
-
-static inline void binder_unlock(const char *tag)
-{
- trace_binder_unlock(tag);
- mutex_unlock(&binder_main_lock);
-}
-
-static void binder_set_nice(long nice)
-{
- long min_nice;
-
- if (can_nice(current, nice)) {
- set_user_nice(current, nice);
- return;
- }
- min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur);
- binder_debug(BINDER_DEBUG_PRIORITY_CAP,
- "%d: nice value %ld not allowed use %ld instead\n",
- current->pid, nice, min_nice);
- set_user_nice(current, min_nice);
- if (min_nice <= MAX_NICE)
- return;
- binder_user_error("%d RLIMIT_NICE not set\n", current->pid);
-}
-
-static size_t binder_buffer_size(struct binder_proc *proc,
- struct binder_buffer *buffer)
-{
- if (list_is_last(&buffer->entry, &proc->buffers))
- return proc->buffer + proc->buffer_size - (void *)buffer->data;
- return (size_t)list_entry(buffer->entry.next,
- struct binder_buffer, entry) - (size_t)buffer->data;
-}
-
-static void binder_insert_free_buffer(struct binder_proc *proc,
- struct binder_buffer *new_buffer)
-{
- struct rb_node **p = &proc->free_buffers.rb_node;
- struct rb_node *parent = NULL;
- struct binder_buffer *buffer;
- size_t buffer_size;
- size_t new_buffer_size;
-
- BUG_ON(!new_buffer->free);
-
- new_buffer_size = binder_buffer_size(proc, new_buffer);
-
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: add free buffer, size %zd, at %p\n",
- proc->pid, new_buffer_size, new_buffer);
-
- while (*p) {
- parent = *p;
- buffer = rb_entry(parent, struct binder_buffer, rb_node);
- BUG_ON(!buffer->free);
-
- buffer_size = binder_buffer_size(proc, buffer);
-
- if (new_buffer_size < buffer_size)
- p = &parent->rb_left;
- else
- p = &parent->rb_right;
- }
- rb_link_node(&new_buffer->rb_node, parent, p);
- rb_insert_color(&new_buffer->rb_node, &proc->free_buffers);
-}
-
-static void binder_insert_allocated_buffer(struct binder_proc *proc,
- struct binder_buffer *new_buffer)
-{
- struct rb_node **p = &proc->allocated_buffers.rb_node;
- struct rb_node *parent = NULL;
- struct binder_buffer *buffer;
-
- BUG_ON(new_buffer->free);
-
- while (*p) {
- parent = *p;
- buffer = rb_entry(parent, struct binder_buffer, rb_node);
- BUG_ON(buffer->free);
-
- if (new_buffer < buffer)
- p = &parent->rb_left;
- else if (new_buffer > buffer)
- p = &parent->rb_right;
- else
- BUG();
- }
- rb_link_node(&new_buffer->rb_node, parent, p);
- rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers);
-}
-
-static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc,
- uintptr_t user_ptr)
-{
- struct rb_node *n = proc->allocated_buffers.rb_node;
- struct binder_buffer *buffer;
- struct binder_buffer *kern_ptr;
-
- kern_ptr = (struct binder_buffer *)(user_ptr - proc->user_buffer_offset
- - offsetof(struct binder_buffer, data));
-
- while (n) {
- buffer = rb_entry(n, struct binder_buffer, rb_node);
- BUG_ON(buffer->free);
-
- if (kern_ptr < buffer)
- n = n->rb_left;
- else if (kern_ptr > buffer)
- n = n->rb_right;
- else
- return buffer;
- }
- return NULL;
-}
-
-static int binder_update_page_range(struct binder_proc *proc, int allocate,
- void *start, void *end,
- struct vm_area_struct *vma)
-{
- void *page_addr;
- unsigned long user_page_addr;
- struct vm_struct tmp_area;
- struct page **page;
- struct mm_struct *mm;
-
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: %s pages %p-%p\n", proc->pid,
- allocate ? "allocate" : "free", start, end);
-
- if (end <= start)
- return 0;
-
- trace_binder_update_page_range(proc, allocate, start, end);
-
- if (vma)
- mm = NULL;
- else
- mm = get_task_mm(proc->tsk);
-
- if (mm) {
- down_write(&mm->mmap_sem);
- vma = proc->vma;
- if (vma && mm != proc->vma_vm_mm) {
- pr_err("%d: vma mm and task mm mismatch\n",
- proc->pid);
- vma = NULL;
- }
- }
-
- if (allocate == 0)
- goto free_range;
-
- if (vma == NULL) {
- pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n",
- proc->pid);
- goto err_no_vma;
- }
-
- for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
- int ret;
-
- page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
-
- BUG_ON(*page);
- *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
- if (*page == NULL) {
- pr_err("%d: binder_alloc_buf failed for page at %p\n",
- proc->pid, page_addr);
- goto err_alloc_page_failed;
- }
- tmp_area.addr = page_addr;
- tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */;
- ret = map_vm_area(&tmp_area, PAGE_KERNEL, page);
- if (ret) {
- pr_err("%d: binder_alloc_buf failed to map page at %p in kernel\n",
- proc->pid, page_addr);
- goto err_map_kernel_failed;
- }
- user_page_addr =
- (uintptr_t)page_addr + proc->user_buffer_offset;
- ret = vm_insert_page(vma, user_page_addr, page[0]);
- if (ret) {
- pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
- proc->pid, user_page_addr);
- goto err_vm_insert_page_failed;
- }
- /* vm_insert_page does not seem to increment the refcount */
- }
- if (mm) {
- up_write(&mm->mmap_sem);
- mmput(mm);
- }
- return 0;
-
-free_range:
- for (page_addr = end - PAGE_SIZE; page_addr >= start;
- page_addr -= PAGE_SIZE) {
- page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
- if (vma)
- zap_page_range(vma, (uintptr_t)page_addr +
- proc->user_buffer_offset, PAGE_SIZE, NULL);
-err_vm_insert_page_failed:
- unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
-err_map_kernel_failed:
- __free_page(*page);
- *page = NULL;
-err_alloc_page_failed:
- ;
- }
-err_no_vma:
- if (mm) {
- up_write(&mm->mmap_sem);
- mmput(mm);
- }
- return -ENOMEM;
-}
-
-static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
- size_t data_size,
- size_t offsets_size, int is_async)
-{
- struct rb_node *n = proc->free_buffers.rb_node;
- struct binder_buffer *buffer;
- size_t buffer_size;
- struct rb_node *best_fit = NULL;
- void *has_page_addr;
- void *end_page_addr;
- size_t size;
-
- if (proc->vma == NULL) {
- pr_err("%d: binder_alloc_buf, no vma\n",
- proc->pid);
- return NULL;
- }
-
- size = ALIGN(data_size, sizeof(void *)) +
- ALIGN(offsets_size, sizeof(void *));
-
- if (size < data_size || size < offsets_size) {
- binder_user_error("%d: got transaction with invalid size %zd-%zd\n",
- proc->pid, data_size, offsets_size);
- return NULL;
- }
-
- if (is_async &&
- proc->free_async_space < size + sizeof(struct binder_buffer)) {
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: binder_alloc_buf size %zd failed, no async space left\n",
- proc->pid, size);
- return NULL;
- }
-
- while (n) {
- buffer = rb_entry(n, struct binder_buffer, rb_node);
- BUG_ON(!buffer->free);
- buffer_size = binder_buffer_size(proc, buffer);
-
- if (size < buffer_size) {
- best_fit = n;
- n = n->rb_left;
- } else if (size > buffer_size)
- n = n->rb_right;
- else {
- best_fit = n;
- break;
- }
- }
- if (best_fit == NULL) {
- pr_err("%d: binder_alloc_buf size %zd failed, no address space\n",
- proc->pid, size);
- return NULL;
- }
- if (n == NULL) {
- buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
- buffer_size = binder_buffer_size(proc, buffer);
- }
-
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: binder_alloc_buf size %zd got buffer %p size %zd\n",
- proc->pid, size, buffer, buffer_size);
-
- has_page_addr =
- (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK);
- if (n == NULL) {
- if (size + sizeof(struct binder_buffer) + 4 >= buffer_size)
- buffer_size = size; /* no room for other buffers */
- else
- buffer_size = size + sizeof(struct binder_buffer);
- }
- end_page_addr =
- (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size);
- if (end_page_addr > has_page_addr)
- end_page_addr = has_page_addr;
- if (binder_update_page_range(proc, 1,
- (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL))
- return NULL;
-
- rb_erase(best_fit, &proc->free_buffers);
- buffer->free = 0;
- binder_insert_allocated_buffer(proc, buffer);
- if (buffer_size != size) {
- struct binder_buffer *new_buffer = (void *)buffer->data + size;
-
- list_add(&new_buffer->entry, &buffer->entry);
- new_buffer->free = 1;
- binder_insert_free_buffer(proc, new_buffer);
- }
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: binder_alloc_buf size %zd got %p\n",
- proc->pid, size, buffer);
- buffer->data_size = data_size;
- buffer->offsets_size = offsets_size;
- buffer->async_transaction = is_async;
- if (is_async) {
- proc->free_async_space -= size + sizeof(struct binder_buffer);
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
- "%d: binder_alloc_buf size %zd async free %zd\n",
- proc->pid, size, proc->free_async_space);
- }
-
- return buffer;
-}
-
-static void *buffer_start_page(struct binder_buffer *buffer)
-{
- return (void *)((uintptr_t)buffer & PAGE_MASK);
-}
-
-static void *buffer_end_page(struct binder_buffer *buffer)
-{
- return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK);
-}
-
-static void binder_delete_free_buffer(struct binder_proc *proc,
- struct binder_buffer *buffer)
-{
- struct binder_buffer *prev, *next = NULL;
- int free_page_end = 1;
- int free_page_start = 1;
-
- BUG_ON(proc->buffers.next == &buffer->entry);
- prev = list_entry(buffer->entry.prev, struct binder_buffer, entry);
- BUG_ON(!prev->free);
- if (buffer_end_page(prev) == buffer_start_page(buffer)) {
- free_page_start = 0;
- if (buffer_end_page(prev) == buffer_end_page(buffer))
- free_page_end = 0;
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: merge free, buffer %p share page with %p\n",
- proc->pid, buffer, prev);
- }
-
- if (!list_is_last(&buffer->entry, &proc->buffers)) {
- next = list_entry(buffer->entry.next,
- struct binder_buffer, entry);
- if (buffer_start_page(next) == buffer_end_page(buffer)) {
- free_page_end = 0;
- if (buffer_start_page(next) ==
- buffer_start_page(buffer))
- free_page_start = 0;
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: merge free, buffer %p share page with %p\n",
- proc->pid, buffer, prev);
- }
- }
- list_del(&buffer->entry);
- if (free_page_start || free_page_end) {
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: merge free, buffer %p do not share page%s%s with %p or %p\n",
- proc->pid, buffer, free_page_start ? "" : " end",
- free_page_end ? "" : " start", prev, next);
- binder_update_page_range(proc, 0, free_page_start ?
- buffer_start_page(buffer) : buffer_end_page(buffer),
- (free_page_end ? buffer_end_page(buffer) :
- buffer_start_page(buffer)) + PAGE_SIZE, NULL);
- }
-}
-
-static void binder_free_buf(struct binder_proc *proc,
- struct binder_buffer *buffer)
-{
- size_t size, buffer_size;
-
- buffer_size = binder_buffer_size(proc, buffer);
-
- size = ALIGN(buffer->data_size, sizeof(void *)) +
- ALIGN(buffer->offsets_size, sizeof(void *));
-
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%d: binder_free_buf %p size %zd buffer_size %zd\n",
- proc->pid, buffer, size, buffer_size);
-
- BUG_ON(buffer->free);
- BUG_ON(size > buffer_size);
- BUG_ON(buffer->transaction != NULL);
- BUG_ON((void *)buffer < proc->buffer);
- BUG_ON((void *)buffer > proc->buffer + proc->buffer_size);
-
- if (buffer->async_transaction) {
- proc->free_async_space += size + sizeof(struct binder_buffer);
-
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
- "%d: binder_free_buf size %zd async free %zd\n",
- proc->pid, size, proc->free_async_space);
- }
-
- binder_update_page_range(proc, 0,
- (void *)PAGE_ALIGN((uintptr_t)buffer->data),
- (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK),
- NULL);
- rb_erase(&buffer->rb_node, &proc->allocated_buffers);
- buffer->free = 1;
- if (!list_is_last(&buffer->entry, &proc->buffers)) {
- struct binder_buffer *next = list_entry(buffer->entry.next,
- struct binder_buffer, entry);
-
- if (next->free) {
- rb_erase(&next->rb_node, &proc->free_buffers);
- binder_delete_free_buffer(proc, next);
- }
- }
- if (proc->buffers.next != &buffer->entry) {
- struct binder_buffer *prev = list_entry(buffer->entry.prev,
- struct binder_buffer, entry);
-
- if (prev->free) {
- binder_delete_free_buffer(proc, buffer);
- rb_erase(&prev->rb_node, &proc->free_buffers);
- buffer = prev;
- }
- }
- binder_insert_free_buffer(proc, buffer);
-}
-
-static struct binder_node *binder_get_node(struct binder_proc *proc,
- binder_uintptr_t ptr)
-{
- struct rb_node *n = proc->nodes.rb_node;
- struct binder_node *node;
-
- while (n) {
- node = rb_entry(n, struct binder_node, rb_node);
-
- if (ptr < node->ptr)
- n = n->rb_left;
- else if (ptr > node->ptr)
- n = n->rb_right;
- else
- return node;
- }
- return NULL;
-}
-
-static struct binder_node *binder_new_node(struct binder_proc *proc,
- binder_uintptr_t ptr,
- binder_uintptr_t cookie)
-{
- struct rb_node **p = &proc->nodes.rb_node;
- struct rb_node *parent = NULL;
- struct binder_node *node;
-
- while (*p) {
- parent = *p;
- node = rb_entry(parent, struct binder_node, rb_node);
-
- if (ptr < node->ptr)
- p = &(*p)->rb_left;
- else if (ptr > node->ptr)
- p = &(*p)->rb_right;
- else
- return NULL;
- }
-
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- if (node == NULL)
- return NULL;
- binder_stats_created(BINDER_STAT_NODE);
- rb_link_node(&node->rb_node, parent, p);
- rb_insert_color(&node->rb_node, &proc->nodes);
- node->debug_id = ++binder_last_id;
- node->proc = proc;
- node->ptr = ptr;
- node->cookie = cookie;
- node->work.type = BINDER_WORK_NODE;
- INIT_LIST_HEAD(&node->work.entry);
- INIT_LIST_HEAD(&node->async_todo);
- binder_debug(BINDER_DEBUG_INTERNAL_REFS,
- "%d:%d node %d u%016llx c%016llx created\n",
- proc->pid, current->pid, node->debug_id,
- (u64)node->ptr, (u64)node->cookie);
- return node;
-}
-
-static int binder_inc_node(struct binder_node *node, int strong, int internal,
- struct list_head *target_list)
-{
- if (strong) {
- if (internal) {
- if (target_list == NULL &&
- node->internal_strong_refs == 0 &&
- !(node == binder_context_mgr_node &&
- node->has_strong_ref)) {
- pr_err("invalid inc strong node for %d\n",
- node->debug_id);
- return -EINVAL;
- }
- node->internal_strong_refs++;
- } else
- node->local_strong_refs++;
- if (!node->has_strong_ref && target_list) {
- list_del_init(&node->work.entry);
- list_add_tail(&node->work.entry, target_list);
- }
- } else {
- if (!internal)
- node->local_weak_refs++;
- if (!node->has_weak_ref && list_empty(&node->work.entry)) {
- if (target_list == NULL) {
- pr_err("invalid inc weak node for %d\n",
- node->debug_id);
- return -EINVAL;
- }
- list_add_tail(&node->work.entry, target_list);
- }
- }
- return 0;
-}
-
-static int binder_dec_node(struct binder_node *node, int strong, int internal)
-{
- if (strong) {
- if (internal)
- node->internal_strong_refs--;
- else
- node->local_strong_refs--;
- if (node->local_strong_refs || node->internal_strong_refs)
- return 0;
- } else {
- if (!internal)
- node->local_weak_refs--;
- if (node->local_weak_refs || !hlist_empty(&node->refs))
- return 0;
- }
- if (node->proc && (node->has_strong_ref || node->has_weak_ref)) {
- if (list_empty(&node->work.entry)) {
- list_add_tail(&node->work.entry, &node->proc->todo);
- wake_up_interruptible(&node->proc->wait);
- }
- } else {
- if (hlist_empty(&node->refs) && !node->local_strong_refs &&
- !node->local_weak_refs) {
- list_del_init(&node->work.entry);
- if (node->proc) {
- rb_erase(&node->rb_node, &node->proc->nodes);
- binder_debug(BINDER_DEBUG_INTERNAL_REFS,
- "refless node %d deleted\n",
- node->debug_id);
- } else {
- hlist_del(&node->dead_node);
- binder_debug(BINDER_DEBUG_INTERNAL_REFS,
- "dead node %d deleted\n",
- node->debug_id);
- }
- kfree(node);
- binder_stats_deleted(BINDER_STAT_NODE);
- }
- }
-
- return 0;
-}
-
-
-static struct binder_ref *binder_get_ref(struct binder_proc *proc,
- uint32_t desc)
-{
- struct rb_node *n = proc->refs_by_desc.rb_node;
- struct binder_ref *ref;
-
- while (n) {
- ref = rb_entry(n, struct binder_ref, rb_node_desc);
-
- if (desc < ref->desc)
- n = n->rb_left;
- else if (desc > ref->desc)
- n = n->rb_right;
- else
- return ref;
- }
- return NULL;
-}
-
-static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc,
- struct binder_node *node)
-{
- struct rb_node *n;
- struct rb_node **p = &proc->refs_by_node.rb_node;
- struct rb_node *parent = NULL;
- struct binder_ref *ref, *new_ref;
-
- while (*p) {
- parent = *p;
- ref = rb_entry(parent, struct binder_ref, rb_node_node);
-
- if (node < ref->node)
- p = &(*p)->rb_left;
- else if (node > ref->node)
- p = &(*p)->rb_right;
- else
- return ref;
- }
- new_ref = kzalloc(sizeof(*ref), GFP_KERNEL);
- if (new_ref == NULL)
- return NULL;
- binder_stats_created(BINDER_STAT_REF);
- new_ref->debug_id = ++binder_last_id;
- new_ref->proc = proc;
- new_ref->node = node;
- rb_link_node(&new_ref->rb_node_node, parent, p);
- rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
-
- new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1;
- for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
- ref = rb_entry(n, struct binder_ref, rb_node_desc);
- if (ref->desc > new_ref->desc)
- break;
- new_ref->desc = ref->desc + 1;
- }
-
- p = &proc->refs_by_desc.rb_node;
- while (*p) {
- parent = *p;
- ref = rb_entry(parent, struct binder_ref, rb_node_desc);
-
- if (new_ref->desc < ref->desc)
- p = &(*p)->rb_left;
- else if (new_ref->desc > ref->desc)
- p = &(*p)->rb_right;
- else
- BUG();
- }
- rb_link_node(&new_ref->rb_node_desc, parent, p);
- rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc);
- if (node) {
- hlist_add_head(&new_ref->node_entry, &node->refs);
-
- binder_debug(BINDER_DEBUG_INTERNAL_REFS,
- "%d new ref %d desc %d for node %d\n",
- proc->pid, new_ref->debug_id, new_ref->desc,
- node->debug_id);
- } else {
- binder_debug(BINDER_DEBUG_INTERNAL_REFS,
- "%d new ref %d desc %d for dead node\n",
- proc->pid, new_ref->debug_id, new_ref->desc);
- }
- return new_ref;
-}
-
-static void binder_delete_ref(struct binder_ref *ref)
-{
- binder_debug(BINDER_DEBUG_INTERNAL_REFS,
- "%d delete ref %d desc %d for node %d\n",
- ref->proc->pid, ref->debug_id, ref->desc,
- ref->node->debug_id);
-
- rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc);
- rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node);
- if (ref->strong)
- binder_dec_node(ref->node, 1, 1);
- hlist_del(&ref->node_entry);
- binder_dec_node(ref->node, 0, 1);
- if (ref->death) {
- binder_debug(BINDER_DEBUG_DEAD_BINDER,
- "%d delete ref %d desc %d has death notification\n",
- ref->proc->pid, ref->debug_id, ref->desc);
- list_del(&ref->death->work.entry);
- kfree(ref->death);
- binder_stats_deleted(BINDER_STAT_DEATH);
- }
- kfree(ref);
- binder_stats_deleted(BINDER_STAT_REF);
-}
-
-static int binder_inc_ref(struct binder_ref *ref, int strong,
- struct list_head *target_list)
-{
- int ret;
-
- if (strong) {
- if (ref->strong == 0) {
- ret = binder_inc_node(ref->node, 1, 1, target_list);
- if (ret)
- return ret;
- }
- ref->strong++;
- } else {
- if (ref->weak == 0) {
- ret = binder_inc_node(ref->node, 0, 1, target_list);
- if (ret)
- return ret;
- }
- ref->weak++;
- }
- return 0;
-}
-
-
-static int binder_dec_ref(struct binder_ref *ref, int strong)
-{
- if (strong) {
- if (ref->strong == 0) {
- binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n",
- ref->proc->pid, ref->debug_id,
- ref->desc, ref->strong, ref->weak);
- return -EINVAL;
- }
- ref->strong--;
- if (ref->strong == 0) {
- int ret;
-
- ret = binder_dec_node(ref->node, strong, 1);
- if (ret)
- return ret;
- }
- } else {
- if (ref->weak == 0) {
- binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n",
- ref->proc->pid, ref->debug_id,
- ref->desc, ref->strong, ref->weak);
- return -EINVAL;
- }
- ref->weak--;
- }
- if (ref->strong == 0 && ref->weak == 0)
- binder_delete_ref(ref);
- return 0;
-}
-
-static void binder_pop_transaction(struct binder_thread *target_thread,
- struct binder_transaction *t)
-{
- if (target_thread) {
- BUG_ON(target_thread->transaction_stack != t);
- BUG_ON(target_thread->transaction_stack->from != target_thread);
- target_thread->transaction_stack =
- target_thread->transaction_stack->from_parent;
- t->from = NULL;
- }
- t->need_reply = 0;
- if (t->buffer)
- t->buffer->transaction = NULL;
- kfree(t);
- binder_stats_deleted(BINDER_STAT_TRANSACTION);
-}
-
-static void binder_send_failed_reply(struct binder_transaction *t,
- uint32_t error_code)
-{
- struct binder_thread *target_thread;
- struct binder_transaction *next;
-
- BUG_ON(t->flags & TF_ONE_WAY);
- while (1) {
- target_thread = t->from;
- if (target_thread) {
- if (target_thread->return_error != BR_OK &&
- target_thread->return_error2 == BR_OK) {
- target_thread->return_error2 =
- target_thread->return_error;
- target_thread->return_error = BR_OK;
- }
- if (target_thread->return_error == BR_OK) {
- binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
- "send failed reply for transaction %d to %d:%d\n",
- t->debug_id,
- target_thread->proc->pid,
- target_thread->pid);
-
- binder_pop_transaction(target_thread, t);
- target_thread->return_error = error_code;
- wake_up_interruptible(&target_thread->wait);
- } else {
- pr_err("reply failed, target thread, %d:%d, has error code %d already\n",
- target_thread->proc->pid,
- target_thread->pid,
- target_thread->return_error);
- }
- return;
- }
- next = t->from_parent;
-
- binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
- "send failed reply for transaction %d, target dead\n",
- t->debug_id);
-
- binder_pop_transaction(target_thread, t);
- if (next == NULL) {
- binder_debug(BINDER_DEBUG_DEAD_BINDER,
- "reply failed, no target thread at root\n");
- return;
- }
- t = next;
- binder_debug(BINDER_DEBUG_DEAD_BINDER,
- "reply failed, no target thread -- retry %d\n",
- t->debug_id);
- }
-}
-
-static void binder_transaction_buffer_release(struct binder_proc *proc,
- struct binder_buffer *buffer,
- binder_size_t *failed_at)
-{
- binder_size_t *offp, *off_end;
- int debug_id = buffer->debug_id;
-
- binder_debug(BINDER_DEBUG_TRANSACTION,
- "%d buffer release %d, size %zd-%zd, failed at %p\n",
- proc->pid, buffer->debug_id,
- buffer->data_size, buffer->offsets_size, failed_at);
-
- if (buffer->target_node)
- binder_dec_node(buffer->target_node, 1, 0);
-
- offp = (binder_size_t *)(buffer->data +
- ALIGN(buffer->data_size, sizeof(void *)));
- if (failed_at)
- off_end = failed_at;
- else
- off_end = (void *)offp + buffer->offsets_size;
- for (; offp < off_end; offp++) {
- struct flat_binder_object *fp;
-
- if (*offp > buffer->data_size - sizeof(*fp) ||
- buffer->data_size < sizeof(*fp) ||
- !IS_ALIGNED(*offp, sizeof(u32))) {
- pr_err("transaction release %d bad offset %lld, size %zd\n",
- debug_id, (u64)*offp, buffer->data_size);
- continue;
- }
- fp = (struct flat_binder_object *)(buffer->data + *offp);
- switch (fp->type) {
- case BINDER_TYPE_BINDER:
- case BINDER_TYPE_WEAK_BINDER: {
- struct binder_node *node = binder_get_node(proc, fp->binder);
-
- if (node == NULL) {
- pr_err("transaction release %d bad node %016llx\n",
- debug_id, (u64)fp->binder);
- break;
- }
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " node %d u%016llx\n",
- node->debug_id, (u64)node->ptr);
- binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
- } break;
- case BINDER_TYPE_HANDLE:
- case BINDER_TYPE_WEAK_HANDLE: {
- struct binder_ref *ref = binder_get_ref(proc, fp->handle);
-
- if (ref == NULL) {
- pr_err("transaction release %d bad handle %d\n",
- debug_id, fp->handle);
- break;
- }
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " ref %d desc %d (node %d)\n",
- ref->debug_id, ref->desc, ref->node->debug_id);
- binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE);
- } break;
-
- case BINDER_TYPE_FD:
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " fd %d\n", fp->handle);
- if (failed_at)
- task_close_fd(proc, fp->handle);
- break;
-
- default:
- pr_err("transaction release %d bad object type %x\n",
- debug_id, fp->type);
- break;
- }
- }
-}
-
-static void binder_transaction(struct binder_proc *proc,
- struct binder_thread *thread,
- struct binder_transaction_data *tr, int reply)
-{
- struct binder_transaction *t;
- struct binder_work *tcomplete;
- binder_size_t *offp, *off_end;
- struct binder_proc *target_proc;
- struct binder_thread *target_thread = NULL;
- struct binder_node *target_node = NULL;
- struct list_head *target_list;
- wait_queue_head_t *target_wait;
- struct binder_transaction *in_reply_to = NULL;
- struct binder_transaction_log_entry *e;
- uint32_t return_error;
-
- e = binder_transaction_log_add(&binder_transaction_log);
- e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
- e->from_proc = proc->pid;
- e->from_thread = thread->pid;
- e->target_handle = tr->target.handle;
- e->data_size = tr->data_size;
- e->offsets_size = tr->offsets_size;
-
- if (reply) {
- in_reply_to = thread->transaction_stack;
- if (in_reply_to == NULL) {
- binder_user_error("%d:%d got reply transaction with no transaction stack\n",
- proc->pid, thread->pid);
- return_error = BR_FAILED_REPLY;
- goto err_empty_call_stack;
- }
- binder_set_nice(in_reply_to->saved_priority);
- if (in_reply_to->to_thread != thread) {
- binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n",
- proc->pid, thread->pid, in_reply_to->debug_id,
- in_reply_to->to_proc ?
- in_reply_to->to_proc->pid : 0,
- in_reply_to->to_thread ?
- in_reply_to->to_thread->pid : 0);
- return_error = BR_FAILED_REPLY;
- in_reply_to = NULL;
- goto err_bad_call_stack;
- }
- thread->transaction_stack = in_reply_to->to_parent;
- target_thread = in_reply_to->from;
- if (target_thread == NULL) {
- return_error = BR_DEAD_REPLY;
- goto err_dead_binder;
- }
- if (target_thread->transaction_stack != in_reply_to) {
- binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n",
- proc->pid, thread->pid,
- target_thread->transaction_stack ?
- target_thread->transaction_stack->debug_id : 0,
- in_reply_to->debug_id);
- return_error = BR_FAILED_REPLY;
- in_reply_to = NULL;
- target_thread = NULL;
- goto err_dead_binder;
- }
- target_proc = target_thread->proc;
- } else {
- if (tr->target.handle) {
- struct binder_ref *ref;
-
- ref = binder_get_ref(proc, tr->target.handle);
- if (ref == NULL) {
- binder_user_error("%d:%d got transaction to invalid handle\n",
- proc->pid, thread->pid);
- return_error = BR_FAILED_REPLY;
- goto err_invalid_target_handle;
- }
- target_node = ref->node;
- } else {
- target_node = binder_context_mgr_node;
- if (target_node == NULL) {
- return_error = BR_DEAD_REPLY;
- goto err_no_context_mgr_node;
- }
- }
- e->to_node = target_node->debug_id;
- target_proc = target_node->proc;
- if (target_proc == NULL) {
- return_error = BR_DEAD_REPLY;
- goto err_dead_binder;
- }
- if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) {
- struct binder_transaction *tmp;
-
- tmp = thread->transaction_stack;
- if (tmp->to_thread != thread) {
- binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n",
- proc->pid, thread->pid, tmp->debug_id,
- tmp->to_proc ? tmp->to_proc->pid : 0,
- tmp->to_thread ?
- tmp->to_thread->pid : 0);
- return_error = BR_FAILED_REPLY;
- goto err_bad_call_stack;
- }
- while (tmp) {
- if (tmp->from && tmp->from->proc == target_proc)
- target_thread = tmp->from;
- tmp = tmp->from_parent;
- }
- }
- }
- if (target_thread) {
- e->to_thread = target_thread->pid;
- target_list = &target_thread->todo;
- target_wait = &target_thread->wait;
- } else {
- target_list = &target_proc->todo;
- target_wait = &target_proc->wait;
- }
- e->to_proc = target_proc->pid;
-
- /* TODO: reuse incoming transaction for reply */
- t = kzalloc(sizeof(*t), GFP_KERNEL);
- if (t == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_alloc_t_failed;
- }
- binder_stats_created(BINDER_STAT_TRANSACTION);
-
- tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
- if (tcomplete == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_alloc_tcomplete_failed;
- }
- binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE);
-
- t->debug_id = ++binder_last_id;
- e->debug_id = t->debug_id;
-
- if (reply)
- binder_debug(BINDER_DEBUG_TRANSACTION,
- "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld\n",
- proc->pid, thread->pid, t->debug_id,
- target_proc->pid, target_thread->pid,
- (u64)tr->data.ptr.buffer,
- (u64)tr->data.ptr.offsets,
- (u64)tr->data_size, (u64)tr->offsets_size);
- else
- binder_debug(BINDER_DEBUG_TRANSACTION,
- "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld\n",
- proc->pid, thread->pid, t->debug_id,
- target_proc->pid, target_node->debug_id,
- (u64)tr->data.ptr.buffer,
- (u64)tr->data.ptr.offsets,
- (u64)tr->data_size, (u64)tr->offsets_size);
-
- if (!reply && !(tr->flags & TF_ONE_WAY))
- t->from = thread;
- else
- t->from = NULL;
- t->sender_euid = task_euid(proc->tsk);
- t->to_proc = target_proc;
- t->to_thread = target_thread;
- t->code = tr->code;
- t->flags = tr->flags;
- t->priority = task_nice(current);
-
- trace_binder_transaction(reply, t, target_node);
-
- t->buffer = binder_alloc_buf(target_proc, tr->data_size,
- tr->offsets_size, !reply && (t->flags & TF_ONE_WAY));
- if (t->buffer == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_binder_alloc_buf_failed;
- }
- t->buffer->allow_user_free = 0;
- t->buffer->debug_id = t->debug_id;
- t->buffer->transaction = t;
- t->buffer->target_node = target_node;
- trace_binder_transaction_alloc_buf(t->buffer);
- if (target_node)
- binder_inc_node(target_node, 1, 0, NULL);
-
- offp = (binder_size_t *)(t->buffer->data +
- ALIGN(tr->data_size, sizeof(void *)));
-
- if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t)
- tr->data.ptr.buffer, tr->data_size)) {
- binder_user_error("%d:%d got transaction with invalid data ptr\n",
- proc->pid, thread->pid);
- return_error = BR_FAILED_REPLY;
- goto err_copy_data_failed;
- }
- if (copy_from_user(offp, (const void __user *)(uintptr_t)
- tr->data.ptr.offsets, tr->offsets_size)) {
- binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
- proc->pid, thread->pid);
- return_error = BR_FAILED_REPLY;
- goto err_copy_data_failed;
- }
- if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) {
- binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n",
- proc->pid, thread->pid, (u64)tr->offsets_size);
- return_error = BR_FAILED_REPLY;
- goto err_bad_offset;
- }
- off_end = (void *)offp + tr->offsets_size;
- for (; offp < off_end; offp++) {
- struct flat_binder_object *fp;
-
- if (*offp > t->buffer->data_size - sizeof(*fp) ||
- t->buffer->data_size < sizeof(*fp) ||
- !IS_ALIGNED(*offp, sizeof(u32))) {
- binder_user_error("%d:%d got transaction with invalid offset, %lld\n",
- proc->pid, thread->pid, (u64)*offp);
- return_error = BR_FAILED_REPLY;
- goto err_bad_offset;
- }
- fp = (struct flat_binder_object *)(t->buffer->data + *offp);
- switch (fp->type) {
- case BINDER_TYPE_BINDER:
- case BINDER_TYPE_WEAK_BINDER: {
- struct binder_ref *ref;
- struct binder_node *node = binder_get_node(proc, fp->binder);
-
- if (node == NULL) {
- node = binder_new_node(proc, fp->binder, fp->cookie);
- if (node == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_binder_new_node_failed;
- }
- node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
- node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
- }
- if (fp->cookie != node->cookie) {
- binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
- proc->pid, thread->pid,
- (u64)fp->binder, node->debug_id,
- (u64)fp->cookie, (u64)node->cookie);
- return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_for_node_failed;
- }
- ref = binder_get_ref_for_node(target_proc, node);
- if (ref == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_for_node_failed;
- }
- if (fp->type == BINDER_TYPE_BINDER)
- fp->type = BINDER_TYPE_HANDLE;
- else
- fp->type = BINDER_TYPE_WEAK_HANDLE;
- fp->handle = ref->desc;
- binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE,
- &thread->todo);
-
- trace_binder_transaction_node_to_ref(t, node, ref);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " node %d u%016llx -> ref %d desc %d\n",
- node->debug_id, (u64)node->ptr,
- ref->debug_id, ref->desc);
- } break;
- case BINDER_TYPE_HANDLE:
- case BINDER_TYPE_WEAK_HANDLE: {
- struct binder_ref *ref = binder_get_ref(proc, fp->handle);
-
- if (ref == NULL) {
- binder_user_error("%d:%d got transaction with invalid handle, %d\n",
- proc->pid,
- thread->pid, fp->handle);
- return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_failed;
- }
- if (ref->node->proc == target_proc) {
- if (fp->type == BINDER_TYPE_HANDLE)
- fp->type = BINDER_TYPE_BINDER;
- else
- fp->type = BINDER_TYPE_WEAK_BINDER;
- fp->binder = ref->node->ptr;
- fp->cookie = ref->node->cookie;
- binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL);
- trace_binder_transaction_ref_to_node(t, ref);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " ref %d desc %d -> node %d u%016llx\n",
- ref->debug_id, ref->desc, ref->node->debug_id,
- (u64)ref->node->ptr);
- } else {
- struct binder_ref *new_ref;
-
- new_ref = binder_get_ref_for_node(target_proc, ref->node);
- if (new_ref == NULL) {
- return_error = BR_FAILED_REPLY;
- goto err_binder_get_ref_for_node_failed;
- }
- fp->handle = new_ref->desc;
- binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
- trace_binder_transaction_ref_to_ref(t, ref,
- new_ref);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " ref %d desc %d -> ref %d desc %d (node %d)\n",
- ref->debug_id, ref->desc, new_ref->debug_id,
- new_ref->desc, ref->node->debug_id);
- }
- } break;
-
- case BINDER_TYPE_FD: {
- int target_fd;
- struct file *file;
-
- if (reply) {
- if (!(in_reply_to->flags & TF_ACCEPT_FDS)) {
- binder_user_error("%d:%d got reply with fd, %d, but target does not allow fds\n",
- proc->pid, thread->pid, fp->handle);
- return_error = BR_FAILED_REPLY;
- goto err_fd_not_allowed;
- }
- } else if (!target_node->accept_fds) {
- binder_user_error("%d:%d got transaction with fd, %d, but target does not allow fds\n",
- proc->pid, thread->pid, fp->handle);
- return_error = BR_FAILED_REPLY;
- goto err_fd_not_allowed;
- }
-
- file = fget(fp->handle);
- if (file == NULL) {
- binder_user_error("%d:%d got transaction with invalid fd, %d\n",
- proc->pid, thread->pid, fp->handle);
- return_error = BR_FAILED_REPLY;
- goto err_fget_failed;
- }
- target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC);
- if (target_fd < 0) {
- fput(file);
- return_error = BR_FAILED_REPLY;
- goto err_get_unused_fd_failed;
- }
- task_fd_install(target_proc, target_fd, file);
- trace_binder_transaction_fd(t, fp->handle, target_fd);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- " fd %d -> %d\n", fp->handle, target_fd);
- /* TODO: fput? */
- fp->handle = target_fd;
- } break;
-
- default:
- binder_user_error("%d:%d got transaction with invalid object type, %x\n",
- proc->pid, thread->pid, fp->type);
- return_error = BR_FAILED_REPLY;
- goto err_bad_object_type;
- }
- }
- if (reply) {
- BUG_ON(t->buffer->async_transaction != 0);
- binder_pop_transaction(target_thread, in_reply_to);
- } else if (!(t->flags & TF_ONE_WAY)) {
- BUG_ON(t->buffer->async_transaction != 0);
- t->need_reply = 1;
- t->from_parent = thread->transaction_stack;
- thread->transaction_stack = t;
- } else {
- BUG_ON(target_node == NULL);
- BUG_ON(t->buffer->async_transaction != 1);
- if (target_node->has_async_transaction) {
- target_list = &target_node->async_todo;
- target_wait = NULL;
- } else
- target_node->has_async_transaction = 1;
- }
- t->work.type = BINDER_WORK_TRANSACTION;
- list_add_tail(&t->work.entry, target_list);
- tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE;
- list_add_tail(&tcomplete->entry, &thread->todo);
- if (target_wait)
- wake_up_interruptible(target_wait);
- return;
-
-err_get_unused_fd_failed:
-err_fget_failed:
-err_fd_not_allowed:
-err_binder_get_ref_for_node_failed:
-err_binder_get_ref_failed:
-err_binder_new_node_failed:
-err_bad_object_type:
-err_bad_offset:
-err_copy_data_failed:
- trace_binder_transaction_failed_buffer_release(t->buffer);
- binder_transaction_buffer_release(target_proc, t->buffer, offp);
- t->buffer->transaction = NULL;
- binder_free_buf(target_proc, t->buffer);
-err_binder_alloc_buf_failed:
- kfree(tcomplete);
- binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
-err_alloc_tcomplete_failed:
- kfree(t);
- binder_stats_deleted(BINDER_STAT_TRANSACTION);
-err_alloc_t_failed:
-err_bad_call_stack:
-err_empty_call_stack:
-err_dead_binder:
-err_invalid_target_handle:
-err_no_context_mgr_node:
- binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
- "%d:%d transaction failed %d, size %lld-%lld\n",
- proc->pid, thread->pid, return_error,
- (u64)tr->data_size, (u64)tr->offsets_size);
-
- {
- struct binder_transaction_log_entry *fe;
-
- fe = binder_transaction_log_add(&binder_transaction_log_failed);
- *fe = *e;
- }
-
- BUG_ON(thread->return_error != BR_OK);
- if (in_reply_to) {
- thread->return_error = BR_TRANSACTION_COMPLETE;
- binder_send_failed_reply(in_reply_to, return_error);
- } else
- thread->return_error = return_error;
-}
-
-static int binder_thread_write(struct binder_proc *proc,
- struct binder_thread *thread,
- binder_uintptr_t binder_buffer, size_t size,
- binder_size_t *consumed)
-{
- uint32_t cmd;
- void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
- void __user *ptr = buffer + *consumed;
- void __user *end = buffer + size;
-
- while (ptr < end && thread->return_error == BR_OK) {
- if (get_user(cmd, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- trace_binder_command(cmd);
- if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) {
- binder_stats.bc[_IOC_NR(cmd)]++;
- proc->stats.bc[_IOC_NR(cmd)]++;
- thread->stats.bc[_IOC_NR(cmd)]++;
- }
- switch (cmd) {
- case BC_INCREFS:
- case BC_ACQUIRE:
- case BC_RELEASE:
- case BC_DECREFS: {
- uint32_t target;
- struct binder_ref *ref;
- const char *debug_string;
-
- if (get_user(target, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- if (target == 0 && binder_context_mgr_node &&
- (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) {
- ref = binder_get_ref_for_node(proc,
- binder_context_mgr_node);
- if (ref->desc != target) {
- binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n",
- proc->pid, thread->pid,
- ref->desc);
- }
- } else
- ref = binder_get_ref(proc, target);
- if (ref == NULL) {
- binder_user_error("%d:%d refcount change on invalid ref %d\n",
- proc->pid, thread->pid, target);
- break;
- }
- switch (cmd) {
- case BC_INCREFS:
- debug_string = "IncRefs";
- binder_inc_ref(ref, 0, NULL);
- break;
- case BC_ACQUIRE:
- debug_string = "Acquire";
- binder_inc_ref(ref, 1, NULL);
- break;
- case BC_RELEASE:
- debug_string = "Release";
- binder_dec_ref(ref, 1);
- break;
- case BC_DECREFS:
- default:
- debug_string = "DecRefs";
- binder_dec_ref(ref, 0);
- break;
- }
- binder_debug(BINDER_DEBUG_USER_REFS,
- "%d:%d %s ref %d desc %d s %d w %d for node %d\n",
- proc->pid, thread->pid, debug_string, ref->debug_id,
- ref->desc, ref->strong, ref->weak, ref->node->debug_id);
- break;
- }
- case BC_INCREFS_DONE:
- case BC_ACQUIRE_DONE: {
- binder_uintptr_t node_ptr;
- binder_uintptr_t cookie;
- struct binder_node *node;
-
- if (get_user(node_ptr, (binder_uintptr_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(binder_uintptr_t);
- if (get_user(cookie, (binder_uintptr_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(binder_uintptr_t);
- node = binder_get_node(proc, node_ptr);
- if (node == NULL) {
- binder_user_error("%d:%d %s u%016llx no match\n",
- proc->pid, thread->pid,
- cmd == BC_INCREFS_DONE ?
- "BC_INCREFS_DONE" :
- "BC_ACQUIRE_DONE",
- (u64)node_ptr);
- break;
- }
- if (cookie != node->cookie) {
- binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n",
- proc->pid, thread->pid,
- cmd == BC_INCREFS_DONE ?
- "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
- (u64)node_ptr, node->debug_id,
- (u64)cookie, (u64)node->cookie);
- break;
- }
- if (cmd == BC_ACQUIRE_DONE) {
- if (node->pending_strong_ref == 0) {
- binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n",
- proc->pid, thread->pid,
- node->debug_id);
- break;
- }
- node->pending_strong_ref = 0;
- } else {
- if (node->pending_weak_ref == 0) {
- binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n",
- proc->pid, thread->pid,
- node->debug_id);
- break;
- }
- node->pending_weak_ref = 0;
- }
- binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0);
- binder_debug(BINDER_DEBUG_USER_REFS,
- "%d:%d %s node %d ls %d lw %d\n",
- proc->pid, thread->pid,
- cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
- node->debug_id, node->local_strong_refs, node->local_weak_refs);
- break;
- }
- case BC_ATTEMPT_ACQUIRE:
- pr_err("BC_ATTEMPT_ACQUIRE not supported\n");
- return -EINVAL;
- case BC_ACQUIRE_RESULT:
- pr_err("BC_ACQUIRE_RESULT not supported\n");
- return -EINVAL;
-
- case BC_FREE_BUFFER: {
- binder_uintptr_t data_ptr;
- struct binder_buffer *buffer;
-
- if (get_user(data_ptr, (binder_uintptr_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(binder_uintptr_t);
-
- buffer = binder_buffer_lookup(proc, data_ptr);
- if (buffer == NULL) {
- binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n",
- proc->pid, thread->pid, (u64)data_ptr);
- break;
- }
- if (!buffer->allow_user_free) {
- binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n",
- proc->pid, thread->pid, (u64)data_ptr);
- break;
- }
- binder_debug(BINDER_DEBUG_FREE_BUFFER,
- "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n",
- proc->pid, thread->pid, (u64)data_ptr,
- buffer->debug_id,
- buffer->transaction ? "active" : "finished");
-
- if (buffer->transaction) {
- buffer->transaction->buffer = NULL;
- buffer->transaction = NULL;
- }
- if (buffer->async_transaction && buffer->target_node) {
- BUG_ON(!buffer->target_node->has_async_transaction);
- if (list_empty(&buffer->target_node->async_todo))
- buffer->target_node->has_async_transaction = 0;
- else
- list_move_tail(buffer->target_node->async_todo.next, &thread->todo);
- }
- trace_binder_transaction_buffer_release(buffer);
- binder_transaction_buffer_release(proc, buffer, NULL);
- binder_free_buf(proc, buffer);
- break;
- }
-
- case BC_TRANSACTION:
- case BC_REPLY: {
- struct binder_transaction_data tr;
-
- if (copy_from_user(&tr, ptr, sizeof(tr)))
- return -EFAULT;
- ptr += sizeof(tr);
- binder_transaction(proc, thread, &tr, cmd == BC_REPLY);
- break;
- }
-
- case BC_REGISTER_LOOPER:
- binder_debug(BINDER_DEBUG_THREADS,
- "%d:%d BC_REGISTER_LOOPER\n",
- proc->pid, thread->pid);
- if (thread->looper & BINDER_LOOPER_STATE_ENTERED) {
- thread->looper |= BINDER_LOOPER_STATE_INVALID;
- binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n",
- proc->pid, thread->pid);
- } else if (proc->requested_threads == 0) {
- thread->looper |= BINDER_LOOPER_STATE_INVALID;
- binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n",
- proc->pid, thread->pid);
- } else {
- proc->requested_threads--;
- proc->requested_threads_started++;
- }
- thread->looper |= BINDER_LOOPER_STATE_REGISTERED;
- break;
- case BC_ENTER_LOOPER:
- binder_debug(BINDER_DEBUG_THREADS,
- "%d:%d BC_ENTER_LOOPER\n",
- proc->pid, thread->pid);
- if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) {
- thread->looper |= BINDER_LOOPER_STATE_INVALID;
- binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n",
- proc->pid, thread->pid);
- }
- thread->looper |= BINDER_LOOPER_STATE_ENTERED;
- break;
- case BC_EXIT_LOOPER:
- binder_debug(BINDER_DEBUG_THREADS,
- "%d:%d BC_EXIT_LOOPER\n",
- proc->pid, thread->pid);
- thread->looper |= BINDER_LOOPER_STATE_EXITED;
- break;
-
- case BC_REQUEST_DEATH_NOTIFICATION:
- case BC_CLEAR_DEATH_NOTIFICATION: {
- uint32_t target;
- binder_uintptr_t cookie;
- struct binder_ref *ref;
- struct binder_ref_death *death;
-
- if (get_user(target, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- if (get_user(cookie, (binder_uintptr_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(binder_uintptr_t);
- ref = binder_get_ref(proc, target);
- if (ref == NULL) {
- binder_user_error("%d:%d %s invalid ref %d\n",
- proc->pid, thread->pid,
- cmd == BC_REQUEST_DEATH_NOTIFICATION ?
- "BC_REQUEST_DEATH_NOTIFICATION" :
- "BC_CLEAR_DEATH_NOTIFICATION",
- target);
- break;
- }
-
- binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
- "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n",
- proc->pid, thread->pid,
- cmd == BC_REQUEST_DEATH_NOTIFICATION ?
- "BC_REQUEST_DEATH_NOTIFICATION" :
- "BC_CLEAR_DEATH_NOTIFICATION",
- (u64)cookie, ref->debug_id, ref->desc,
- ref->strong, ref->weak, ref->node->debug_id);
-
- if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
- if (ref->death) {
- binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n",
- proc->pid, thread->pid);
- break;
- }
- death = kzalloc(sizeof(*death), GFP_KERNEL);
- if (death == NULL) {
- thread->return_error = BR_ERROR;
- binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
- "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n",
- proc->pid, thread->pid);
- break;
- }
- binder_stats_created(BINDER_STAT_DEATH);
- INIT_LIST_HEAD(&death->work.entry);
- death->cookie = cookie;
- ref->death = death;
- if (ref->node->proc == NULL) {
- ref->death->work.type = BINDER_WORK_DEAD_BINDER;
- if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
- list_add_tail(&ref->death->work.entry, &thread->todo);
- } else {
- list_add_tail(&ref->death->work.entry, &proc->todo);
- wake_up_interruptible(&proc->wait);
- }
- }
- } else {
- if (ref->death == NULL) {
- binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n",
- proc->pid, thread->pid);
- break;
- }
- death = ref->death;
- if (death->cookie != cookie) {
- binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n",
- proc->pid, thread->pid,
- (u64)death->cookie,
- (u64)cookie);
- break;
- }
- ref->death = NULL;
- if (list_empty(&death->work.entry)) {
- death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
- if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
- list_add_tail(&death->work.entry, &thread->todo);
- } else {
- list_add_tail(&death->work.entry, &proc->todo);
- wake_up_interruptible(&proc->wait);
- }
- } else {
- BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
- death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
- }
- }
- } break;
- case BC_DEAD_BINDER_DONE: {
- struct binder_work *w;
- binder_uintptr_t cookie;
- struct binder_ref_death *death = NULL;
-
- if (get_user(cookie, (binder_uintptr_t __user *)ptr))
- return -EFAULT;
-
- ptr += sizeof(void *);
- list_for_each_entry(w, &proc->delivered_death, entry) {
- struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);
-
- if (tmp_death->cookie == cookie) {
- death = tmp_death;
- break;
- }
- }
- binder_debug(BINDER_DEBUG_DEAD_BINDER,
- "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n",
- proc->pid, thread->pid, (u64)cookie,
- death);
- if (death == NULL) {
- binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n",
- proc->pid, thread->pid, (u64)cookie);
- break;
- }
-
- list_del_init(&death->work.entry);
- if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
- death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
- if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
- list_add_tail(&death->work.entry, &thread->todo);
- } else {
- list_add_tail(&death->work.entry, &proc->todo);
- wake_up_interruptible(&proc->wait);
- }
- }
- } break;
-
- default:
- pr_err("%d:%d unknown command %d\n",
- proc->pid, thread->pid, cmd);
- return -EINVAL;
- }
- *consumed = ptr - buffer;
- }
- return 0;
-}
-
-static void binder_stat_br(struct binder_proc *proc,
- struct binder_thread *thread, uint32_t cmd)
-{
- trace_binder_return(cmd);
- if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) {
- binder_stats.br[_IOC_NR(cmd)]++;
- proc->stats.br[_IOC_NR(cmd)]++;
- thread->stats.br[_IOC_NR(cmd)]++;
- }
-}
-
-static int binder_has_proc_work(struct binder_proc *proc,
- struct binder_thread *thread)
-{
- return !list_empty(&proc->todo) ||
- (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
-}
-
-static int binder_has_thread_work(struct binder_thread *thread)
-{
- return !list_empty(&thread->todo) || thread->return_error != BR_OK ||
- (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
-}
-
-static int binder_thread_read(struct binder_proc *proc,
- struct binder_thread *thread,
- binder_uintptr_t binder_buffer, size_t size,
- binder_size_t *consumed, int non_block)
-{
- void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
- void __user *ptr = buffer + *consumed;
- void __user *end = buffer + size;
-
- int ret = 0;
- int wait_for_proc_work;
-
- if (*consumed == 0) {
- if (put_user(BR_NOOP, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- }
-
-retry:
- wait_for_proc_work = thread->transaction_stack == NULL &&
- list_empty(&thread->todo);
-
- if (thread->return_error != BR_OK && ptr < end) {
- if (thread->return_error2 != BR_OK) {
- if (put_user(thread->return_error2, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- binder_stat_br(proc, thread, thread->return_error2);
- if (ptr == end)
- goto done;
- thread->return_error2 = BR_OK;
- }
- if (put_user(thread->return_error, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- binder_stat_br(proc, thread, thread->return_error);
- thread->return_error = BR_OK;
- goto done;
- }
-
-
- thread->looper |= BINDER_LOOPER_STATE_WAITING;
- if (wait_for_proc_work)
- proc->ready_threads++;
-
- binder_unlock(__func__);
-
- trace_binder_wait_for_work(wait_for_proc_work,
- !!thread->transaction_stack,
- !list_empty(&thread->todo));
- if (wait_for_proc_work) {
- if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
- BINDER_LOOPER_STATE_ENTERED))) {
- binder_user_error("%d:%d ERROR: Thread waiting for process work before calling BC_REGISTER_LOOPER or BC_ENTER_LOOPER (state %x)\n",
- proc->pid, thread->pid, thread->looper);
- wait_event_interruptible(binder_user_error_wait,
- binder_stop_on_user_error < 2);
- }
- binder_set_nice(proc->default_priority);
- if (non_block) {
- if (!binder_has_proc_work(proc, thread))
- ret = -EAGAIN;
- } else
- ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread));
- } else {
- if (non_block) {
- if (!binder_has_thread_work(thread))
- ret = -EAGAIN;
- } else
- ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread));
- }
-
- binder_lock(__func__);
-
- if (wait_for_proc_work)
- proc->ready_threads--;
- thread->looper &= ~BINDER_LOOPER_STATE_WAITING;
-
- if (ret)
- return ret;
-
- while (1) {
- uint32_t cmd;
- struct binder_transaction_data tr;
- struct binder_work *w;
- struct binder_transaction *t = NULL;
-
- if (!list_empty(&thread->todo)) {
- w = list_first_entry(&thread->todo, struct binder_work,
- entry);
- } else if (!list_empty(&proc->todo) && wait_for_proc_work) {
- w = list_first_entry(&proc->todo, struct binder_work,
- entry);
- } else {
- /* no data added */
- if (ptr - buffer == 4 &&
- !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN))
- goto retry;
- break;
- }
-
- if (end - ptr < sizeof(tr) + 4)
- break;
-
- switch (w->type) {
- case BINDER_WORK_TRANSACTION: {
- t = container_of(w, struct binder_transaction, work);
- } break;
- case BINDER_WORK_TRANSACTION_COMPLETE: {
- cmd = BR_TRANSACTION_COMPLETE;
- if (put_user(cmd, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
-
- binder_stat_br(proc, thread, cmd);
- binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE,
- "%d:%d BR_TRANSACTION_COMPLETE\n",
- proc->pid, thread->pid);
-
- list_del(&w->entry);
- kfree(w);
- binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
- } break;
- case BINDER_WORK_NODE: {
- struct binder_node *node = container_of(w, struct binder_node, work);
- uint32_t cmd = BR_NOOP;
- const char *cmd_name;
- int strong = node->internal_strong_refs || node->local_strong_refs;
- int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong;
-
- if (weak && !node->has_weak_ref) {
- cmd = BR_INCREFS;
- cmd_name = "BR_INCREFS";
- node->has_weak_ref = 1;
- node->pending_weak_ref = 1;
- node->local_weak_refs++;
- } else if (strong && !node->has_strong_ref) {
- cmd = BR_ACQUIRE;
- cmd_name = "BR_ACQUIRE";
- node->has_strong_ref = 1;
- node->pending_strong_ref = 1;
- node->local_strong_refs++;
- } else if (!strong && node->has_strong_ref) {
- cmd = BR_RELEASE;
- cmd_name = "BR_RELEASE";
- node->has_strong_ref = 0;
- } else if (!weak && node->has_weak_ref) {
- cmd = BR_DECREFS;
- cmd_name = "BR_DECREFS";
- node->has_weak_ref = 0;
- }
- if (cmd != BR_NOOP) {
- if (put_user(cmd, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- if (put_user(node->ptr,
- (binder_uintptr_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(binder_uintptr_t);
- if (put_user(node->cookie,
- (binder_uintptr_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(binder_uintptr_t);
-
- binder_stat_br(proc, thread, cmd);
- binder_debug(BINDER_DEBUG_USER_REFS,
- "%d:%d %s %d u%016llx c%016llx\n",
- proc->pid, thread->pid, cmd_name,
- node->debug_id,
- (u64)node->ptr, (u64)node->cookie);
- } else {
- list_del_init(&w->entry);
- if (!weak && !strong) {
- binder_debug(BINDER_DEBUG_INTERNAL_REFS,
- "%d:%d node %d u%016llx c%016llx deleted\n",
- proc->pid, thread->pid,
- node->debug_id,
- (u64)node->ptr,
- (u64)node->cookie);
- rb_erase(&node->rb_node, &proc->nodes);
- kfree(node);
- binder_stats_deleted(BINDER_STAT_NODE);
- } else {
- binder_debug(BINDER_DEBUG_INTERNAL_REFS,
- "%d:%d node %d u%016llx c%016llx state unchanged\n",
- proc->pid, thread->pid,
- node->debug_id,
- (u64)node->ptr,
- (u64)node->cookie);
- }
- }
- } break;
- case BINDER_WORK_DEAD_BINDER:
- case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
- case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
- struct binder_ref_death *death;
- uint32_t cmd;
-
- death = container_of(w, struct binder_ref_death, work);
- if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
- cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
- else
- cmd = BR_DEAD_BINDER;
- if (put_user(cmd, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- if (put_user(death->cookie,
- (binder_uintptr_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(binder_uintptr_t);
- binder_stat_br(proc, thread, cmd);
- binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
- "%d:%d %s %016llx\n",
- proc->pid, thread->pid,
- cmd == BR_DEAD_BINDER ?
- "BR_DEAD_BINDER" :
- "BR_CLEAR_DEATH_NOTIFICATION_DONE",
- (u64)death->cookie);
-
- if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
- list_del(&w->entry);
- kfree(death);
- binder_stats_deleted(BINDER_STAT_DEATH);
- } else
- list_move(&w->entry, &proc->delivered_death);
- if (cmd == BR_DEAD_BINDER)
- goto done; /* DEAD_BINDER notifications can cause transactions */
- } break;
- }
-
- if (!t)
- continue;
-
- BUG_ON(t->buffer == NULL);
- if (t->buffer->target_node) {
- struct binder_node *target_node = t->buffer->target_node;
-
- tr.target.ptr = target_node->ptr;
- tr.cookie = target_node->cookie;
- t->saved_priority = task_nice(current);
- if (t->priority < target_node->min_priority &&
- !(t->flags & TF_ONE_WAY))
- binder_set_nice(t->priority);
- else if (!(t->flags & TF_ONE_WAY) ||
- t->saved_priority > target_node->min_priority)
- binder_set_nice(target_node->min_priority);
- cmd = BR_TRANSACTION;
- } else {
- tr.target.ptr = 0;
- tr.cookie = 0;
- cmd = BR_REPLY;
- }
- tr.code = t->code;
- tr.flags = t->flags;
- tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid);
-
- if (t->from) {
- struct task_struct *sender = t->from->proc->tsk;
-
- tr.sender_pid = task_tgid_nr_ns(sender,
- task_active_pid_ns(current));
- } else {
- tr.sender_pid = 0;
- }
-
- tr.data_size = t->buffer->data_size;
- tr.offsets_size = t->buffer->offsets_size;
- tr.data.ptr.buffer = (binder_uintptr_t)(
- (uintptr_t)t->buffer->data +
- proc->user_buffer_offset);
- tr.data.ptr.offsets = tr.data.ptr.buffer +
- ALIGN(t->buffer->data_size,
- sizeof(void *));
-
- if (put_user(cmd, (uint32_t __user *)ptr))
- return -EFAULT;
- ptr += sizeof(uint32_t);
- if (copy_to_user(ptr, &tr, sizeof(tr)))
- return -EFAULT;
- ptr += sizeof(tr);
-
- trace_binder_transaction_received(t);
- binder_stat_br(proc, thread, cmd);
- binder_debug(BINDER_DEBUG_TRANSACTION,
- "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n",
- proc->pid, thread->pid,
- (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
- "BR_REPLY",
- t->debug_id, t->from ? t->from->proc->pid : 0,
- t->from ? t->from->pid : 0, cmd,
- t->buffer->data_size, t->buffer->offsets_size,
- (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets);
-
- list_del(&t->work.entry);
- t->buffer->allow_user_free = 1;
- if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
- t->to_parent = thread->transaction_stack;
- t->to_thread = thread;
- thread->transaction_stack = t;
- } else {
- t->buffer->transaction = NULL;
- kfree(t);
- binder_stats_deleted(BINDER_STAT_TRANSACTION);
- }
- break;
- }
-
-done:
-
- *consumed = ptr - buffer;
- if (proc->requested_threads + proc->ready_threads == 0 &&
- proc->requested_threads_started < proc->max_threads &&
- (thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
- BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
- /*spawn a new thread if we leave this out */) {
- proc->requested_threads++;
- binder_debug(BINDER_DEBUG_THREADS,
- "%d:%d BR_SPAWN_LOOPER\n",
- proc->pid, thread->pid);
- if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer))
- return -EFAULT;
- binder_stat_br(proc, thread, BR_SPAWN_LOOPER);
- }
- return 0;
-}
-
-static void binder_release_work(struct list_head *list)
-{
- struct binder_work *w;
-
- while (!list_empty(list)) {
- w = list_first_entry(list, struct binder_work, entry);
- list_del_init(&w->entry);
- switch (w->type) {
- case BINDER_WORK_TRANSACTION: {
- struct binder_transaction *t;
-
- t = container_of(w, struct binder_transaction, work);
- if (t->buffer->target_node &&
- !(t->flags & TF_ONE_WAY)) {
- binder_send_failed_reply(t, BR_DEAD_REPLY);
- } else {
- binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
- "undelivered transaction %d\n",
- t->debug_id);
- t->buffer->transaction = NULL;
- kfree(t);
- binder_stats_deleted(BINDER_STAT_TRANSACTION);
- }
- } break;
- case BINDER_WORK_TRANSACTION_COMPLETE: {
- binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
- "undelivered TRANSACTION_COMPLETE\n");
- kfree(w);
- binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
- } break;
- case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
- case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
- struct binder_ref_death *death;
-
- death = container_of(w, struct binder_ref_death, work);
- binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
- "undelivered death notification, %016llx\n",
- (u64)death->cookie);
- kfree(death);
- binder_stats_deleted(BINDER_STAT_DEATH);
- } break;
- default:
- pr_err("unexpected work type, %d, not freed\n",
- w->type);
- break;
- }
- }
-
-}
-
-static struct binder_thread *binder_get_thread(struct binder_proc *proc)
-{
- struct binder_thread *thread = NULL;
- struct rb_node *parent = NULL;
- struct rb_node **p = &proc->threads.rb_node;
-
- while (*p) {
- parent = *p;
- thread = rb_entry(parent, struct binder_thread, rb_node);
-
- if (current->pid < thread->pid)
- p = &(*p)->rb_left;
- else if (current->pid > thread->pid)
- p = &(*p)->rb_right;
- else
- break;
- }
- if (*p == NULL) {
- thread = kzalloc(sizeof(*thread), GFP_KERNEL);
- if (thread == NULL)
- return NULL;
- binder_stats_created(BINDER_STAT_THREAD);
- thread->proc = proc;
- thread->pid = current->pid;
- init_waitqueue_head(&thread->wait);
- INIT_LIST_HEAD(&thread->todo);
- rb_link_node(&thread->rb_node, parent, p);
- rb_insert_color(&thread->rb_node, &proc->threads);
- thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
- thread->return_error = BR_OK;
- thread->return_error2 = BR_OK;
- }
- return thread;
-}
-
-static int binder_free_thread(struct binder_proc *proc,
- struct binder_thread *thread)
-{
- struct binder_transaction *t;
- struct binder_transaction *send_reply = NULL;
- int active_transactions = 0;
-
- rb_erase(&thread->rb_node, &proc->threads);
- t = thread->transaction_stack;
- if (t && t->to_thread == thread)
- send_reply = t;
- while (t) {
- active_transactions++;
- binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
- "release %d:%d transaction %d %s, still active\n",
- proc->pid, thread->pid,
- t->debug_id,
- (t->to_thread == thread) ? "in" : "out");
-
- if (t->to_thread == thread) {
- t->to_proc = NULL;
- t->to_thread = NULL;
- if (t->buffer) {
- t->buffer->transaction = NULL;
- t->buffer = NULL;
- }
- t = t->to_parent;
- } else if (t->from == thread) {
- t->from = NULL;
- t = t->from_parent;
- } else
- BUG();
- }
- if (send_reply)
- binder_send_failed_reply(send_reply, BR_DEAD_REPLY);
- binder_release_work(&thread->todo);
- kfree(thread);
- binder_stats_deleted(BINDER_STAT_THREAD);
- return active_transactions;
-}
-
-static unsigned int binder_poll(struct file *filp,
- struct poll_table_struct *wait)
-{
- struct binder_proc *proc = filp->private_data;
- struct binder_thread *thread = NULL;
- int wait_for_proc_work;
-
- binder_lock(__func__);
-
- thread = binder_get_thread(proc);
-
- wait_for_proc_work = thread->transaction_stack == NULL &&
- list_empty(&thread->todo) && thread->return_error == BR_OK;
-
- binder_unlock(__func__);
-
- if (wait_for_proc_work) {
- if (binder_has_proc_work(proc, thread))
- return POLLIN;
- poll_wait(filp, &proc->wait, wait);
- if (binder_has_proc_work(proc, thread))
- return POLLIN;
- } else {
- if (binder_has_thread_work(thread))
- return POLLIN;
- poll_wait(filp, &thread->wait, wait);
- if (binder_has_thread_work(thread))
- return POLLIN;
- }
- return 0;
-}
-
-static int binder_ioctl_write_read(struct file *filp,
- unsigned int cmd, unsigned long arg,
- struct binder_thread *thread)
-{
- int ret = 0;
- struct binder_proc *proc = filp->private_data;
- unsigned int size = _IOC_SIZE(cmd);
- void __user *ubuf = (void __user *)arg;
- struct binder_write_read bwr;
-
- if (size != sizeof(struct binder_write_read)) {
- ret = -EINVAL;
- goto out;
- }
- if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
- ret = -EFAULT;
- goto out;
- }
- binder_debug(BINDER_DEBUG_READ_WRITE,
- "%d:%d write %lld at %016llx, read %lld at %016llx\n",
- proc->pid, thread->pid,
- (u64)bwr.write_size, (u64)bwr.write_buffer,
- (u64)bwr.read_size, (u64)bwr.read_buffer);
-
- if (bwr.write_size > 0) {
- ret = binder_thread_write(proc, thread,
- bwr.write_buffer,
- bwr.write_size,
- &bwr.write_consumed);
- trace_binder_write_done(ret);
- if (ret < 0) {
- bwr.read_consumed = 0;
- if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
- ret = -EFAULT;
- goto out;
- }
- }
- if (bwr.read_size > 0) {
- ret = binder_thread_read(proc, thread, bwr.read_buffer,
- bwr.read_size,
- &bwr.read_consumed,
- filp->f_flags & O_NONBLOCK);
- trace_binder_read_done(ret);
- if (!list_empty(&proc->todo))
- wake_up_interruptible(&proc->wait);
- if (ret < 0) {
- if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
- ret = -EFAULT;
- goto out;
- }
- }
- binder_debug(BINDER_DEBUG_READ_WRITE,
- "%d:%d wrote %lld of %lld, read return %lld of %lld\n",
- proc->pid, thread->pid,
- (u64)bwr.write_consumed, (u64)bwr.write_size,
- (u64)bwr.read_consumed, (u64)bwr.read_size);
- if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
- ret = -EFAULT;
- goto out;
- }
-out:
- return ret;
-}
-
-static int binder_ioctl_set_ctx_mgr(struct file *filp)
-{
- int ret = 0;
- struct binder_proc *proc = filp->private_data;
- kuid_t curr_euid = current_euid();
-
- if (binder_context_mgr_node != NULL) {
- pr_err("BINDER_SET_CONTEXT_MGR already set\n");
- ret = -EBUSY;
- goto out;
- }
- if (uid_valid(binder_context_mgr_uid)) {
- if (!uid_eq(binder_context_mgr_uid, curr_euid)) {
- pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
- from_kuid(&init_user_ns, curr_euid),
- from_kuid(&init_user_ns,
- binder_context_mgr_uid));
- ret = -EPERM;
- goto out;
- }
- } else {
- binder_context_mgr_uid = curr_euid;
- }
- binder_context_mgr_node = binder_new_node(proc, 0, 0);
- if (binder_context_mgr_node == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- binder_context_mgr_node->local_weak_refs++;
- binder_context_mgr_node->local_strong_refs++;
- binder_context_mgr_node->has_strong_ref = 1;
- binder_context_mgr_node->has_weak_ref = 1;
-out:
- return ret;
-}
-
-static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
- int ret;
- struct binder_proc *proc = filp->private_data;
- struct binder_thread *thread;
- unsigned int size = _IOC_SIZE(cmd);
- void __user *ubuf = (void __user *)arg;
-
- /*pr_info("binder_ioctl: %d:%d %x %lx\n",
- proc->pid, current->pid, cmd, arg);*/
-
- trace_binder_ioctl(cmd, arg);
-
- ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
- if (ret)
- goto err_unlocked;
-
- binder_lock(__func__);
- thread = binder_get_thread(proc);
- if (thread == NULL) {
- ret = -ENOMEM;
- goto err;
- }
-
- switch (cmd) {
- case BINDER_WRITE_READ:
- ret = binder_ioctl_write_read(filp, cmd, arg, thread);
- if (ret)
- goto err;
- break;
- case BINDER_SET_MAX_THREADS:
- if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
- ret = -EINVAL;
- goto err;
- }
- break;
- case BINDER_SET_CONTEXT_MGR:
- ret = binder_ioctl_set_ctx_mgr(filp);
- if (ret)
- goto err;
- break;
- case BINDER_THREAD_EXIT:
- binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n",
- proc->pid, thread->pid);
- binder_free_thread(proc, thread);
- thread = NULL;
- break;
- case BINDER_VERSION: {
- struct binder_version __user *ver = ubuf;
-
- if (size != sizeof(struct binder_version)) {
- ret = -EINVAL;
- goto err;
- }
- if (put_user(BINDER_CURRENT_PROTOCOL_VERSION,
- &ver->protocol_version)) {
- ret = -EINVAL;
- goto err;
- }
- break;
- }
- default:
- ret = -EINVAL;
- goto err;
- }
- ret = 0;
-err:
- if (thread)
- thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN;
- binder_unlock(__func__);
- wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
- if (ret && ret != -ERESTARTSYS)
- pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret);
-err_unlocked:
- trace_binder_ioctl_done(ret);
- return ret;
-}
-
-static void binder_vma_open(struct vm_area_struct *vma)
-{
- struct binder_proc *proc = vma->vm_private_data;
-
- binder_debug(BINDER_DEBUG_OPEN_CLOSE,
- "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
- proc->pid, vma->vm_start, vma->vm_end,
- (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
- (unsigned long)pgprot_val(vma->vm_page_prot));
-}
-
-static void binder_vma_close(struct vm_area_struct *vma)
-{
- struct binder_proc *proc = vma->vm_private_data;
-
- binder_debug(BINDER_DEBUG_OPEN_CLOSE,
- "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
- proc->pid, vma->vm_start, vma->vm_end,
- (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
- (unsigned long)pgprot_val(vma->vm_page_prot));
- proc->vma = NULL;
- proc->vma_vm_mm = NULL;
- binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES);
-}
-
-static int binder_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
-{
- return VM_FAULT_SIGBUS;
-}
-
-static struct vm_operations_struct binder_vm_ops = {
- .open = binder_vma_open,
- .close = binder_vma_close,
- .fault = binder_vm_fault,
-};
-
-static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
-{
- int ret;
- struct vm_struct *area;
- struct binder_proc *proc = filp->private_data;
- const char *failure_string;
- struct binder_buffer *buffer;
-
- if (proc->tsk != current)
- return -EINVAL;
-
- if ((vma->vm_end - vma->vm_start) > SZ_4M)
- vma->vm_end = vma->vm_start + SZ_4M;
-
- binder_debug(BINDER_DEBUG_OPEN_CLOSE,
- "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n",
- proc->pid, vma->vm_start, vma->vm_end,
- (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
- (unsigned long)pgprot_val(vma->vm_page_prot));
-
- if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
- ret = -EPERM;
- failure_string = "bad vm_flags";
- goto err_bad_arg;
- }
- vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE;
-
- mutex_lock(&binder_mmap_lock);
- if (proc->buffer) {
- ret = -EBUSY;
- failure_string = "already mapped";
- goto err_already_mapped;
- }
-
- area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP);
- if (area == NULL) {
- ret = -ENOMEM;
- failure_string = "get_vm_area";
- goto err_get_vm_area_failed;
- }
- proc->buffer = area->addr;
- proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer;
- mutex_unlock(&binder_mmap_lock);
-
-#ifdef CONFIG_CPU_CACHE_VIPT
- if (cache_is_vipt_aliasing()) {
- while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) {
- pr_info("binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);
- vma->vm_start += PAGE_SIZE;
- }
- }
-#endif
- proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL);
- if (proc->pages == NULL) {
- ret = -ENOMEM;
- failure_string = "alloc page array";
- goto err_alloc_pages_failed;
- }
- proc->buffer_size = vma->vm_end - vma->vm_start;
-
- vma->vm_ops = &binder_vm_ops;
- vma->vm_private_data = proc;
-
- if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) {
- ret = -ENOMEM;
- failure_string = "alloc small buf";
- goto err_alloc_small_buf_failed;
- }
- buffer = proc->buffer;
- INIT_LIST_HEAD(&proc->buffers);
- list_add(&buffer->entry, &proc->buffers);
- buffer->free = 1;
- binder_insert_free_buffer(proc, buffer);
- proc->free_async_space = proc->buffer_size / 2;
- barrier();
- proc->files = get_files_struct(current);
- proc->vma = vma;
- proc->vma_vm_mm = vma->vm_mm;
-
- /*pr_info("binder_mmap: %d %lx-%lx maps %p\n",
- proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/
- return 0;
-
-err_alloc_small_buf_failed:
- kfree(proc->pages);
- proc->pages = NULL;
-err_alloc_pages_failed:
- mutex_lock(&binder_mmap_lock);
- vfree(proc->buffer);
- proc->buffer = NULL;
-err_get_vm_area_failed:
-err_already_mapped:
- mutex_unlock(&binder_mmap_lock);
-err_bad_arg:
- pr_err("binder_mmap: %d %lx-%lx %s failed %d\n",
- proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
- return ret;
-}
-
-static int binder_open(struct inode *nodp, struct file *filp)
-{
- struct binder_proc *proc;
-
- binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n",
- current->group_leader->pid, current->pid);
-
- proc = kzalloc(sizeof(*proc), GFP_KERNEL);
- if (proc == NULL)
- return -ENOMEM;
- get_task_struct(current);
- proc->tsk = current;
- INIT_LIST_HEAD(&proc->todo);
- init_waitqueue_head(&proc->wait);
- proc->default_priority = task_nice(current);
-
- binder_lock(__func__);
-
- binder_stats_created(BINDER_STAT_PROC);
- hlist_add_head(&proc->proc_node, &binder_procs);
- proc->pid = current->group_leader->pid;
- INIT_LIST_HEAD(&proc->delivered_death);
- filp->private_data = proc;
-
- binder_unlock(__func__);
-
- if (binder_debugfs_dir_entry_proc) {
- char strbuf[11];
-
- snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
- proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO,
- binder_debugfs_dir_entry_proc, proc, &binder_proc_fops);
- }
-
- return 0;
-}
-
-static int binder_flush(struct file *filp, fl_owner_t id)
-{
- struct binder_proc *proc = filp->private_data;
-
- binder_defer_work(proc, BINDER_DEFERRED_FLUSH);
-
- return 0;
-}
-
-static void binder_deferred_flush(struct binder_proc *proc)
-{
- struct rb_node *n;
- int wake_count = 0;
-
- for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
- struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
-
- thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
- if (thread->looper & BINDER_LOOPER_STATE_WAITING) {
- wake_up_interruptible(&thread->wait);
- wake_count++;
- }
- }
- wake_up_interruptible_all(&proc->wait);
-
- binder_debug(BINDER_DEBUG_OPEN_CLOSE,
- "binder_flush: %d woke %d threads\n", proc->pid,
- wake_count);
-}
-
-static int binder_release(struct inode *nodp, struct file *filp)
-{
- struct binder_proc *proc = filp->private_data;
-
- debugfs_remove(proc->debugfs_entry);
- binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
-
- return 0;
-}
-
-static int binder_node_release(struct binder_node *node, int refs)
-{
- struct binder_ref *ref;
- int death = 0;
-
- list_del_init(&node->work.entry);
- binder_release_work(&node->async_todo);
-
- if (hlist_empty(&node->refs)) {
- kfree(node);
- binder_stats_deleted(BINDER_STAT_NODE);
-
- return refs;
- }
-
- node->proc = NULL;
- node->local_strong_refs = 0;
- node->local_weak_refs = 0;
- hlist_add_head(&node->dead_node, &binder_dead_nodes);
-
- hlist_for_each_entry(ref, &node->refs, node_entry) {
- refs++;
-
- if (!ref->death)
- continue;
-
- death++;
-
- if (list_empty(&ref->death->work.entry)) {
- ref->death->work.type = BINDER_WORK_DEAD_BINDER;
- list_add_tail(&ref->death->work.entry,
- &ref->proc->todo);
- wake_up_interruptible(&ref->proc->wait);
- } else
- BUG();
- }
-
- binder_debug(BINDER_DEBUG_DEAD_BINDER,
- "node %d now dead, refs %d, death %d\n",
- node->debug_id, refs, death);
-
- return refs;
-}
-
-static void binder_deferred_release(struct binder_proc *proc)
-{
- struct binder_transaction *t;
- struct rb_node *n;
- int threads, nodes, incoming_refs, outgoing_refs, buffers,
- active_transactions, page_count;
-
- BUG_ON(proc->vma);
- BUG_ON(proc->files);
-
- hlist_del(&proc->proc_node);
-
- if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
- binder_debug(BINDER_DEBUG_DEAD_BINDER,
- "%s: %d context_mgr_node gone\n",
- __func__, proc->pid);
- binder_context_mgr_node = NULL;
- }
-
- threads = 0;
- active_transactions = 0;
- while ((n = rb_first(&proc->threads))) {
- struct binder_thread *thread;
-
- thread = rb_entry(n, struct binder_thread, rb_node);
- threads++;
- active_transactions += binder_free_thread(proc, thread);
- }
-
- nodes = 0;
- incoming_refs = 0;
- while ((n = rb_first(&proc->nodes))) {
- struct binder_node *node;
-
- node = rb_entry(n, struct binder_node, rb_node);
- nodes++;
- rb_erase(&node->rb_node, &proc->nodes);
- incoming_refs = binder_node_release(node, incoming_refs);
- }
-
- outgoing_refs = 0;
- while ((n = rb_first(&proc->refs_by_desc))) {
- struct binder_ref *ref;
-
- ref = rb_entry(n, struct binder_ref, rb_node_desc);
- outgoing_refs++;
- binder_delete_ref(ref);
- }
-
- binder_release_work(&proc->todo);
- binder_release_work(&proc->delivered_death);
-
- buffers = 0;
- while ((n = rb_first(&proc->allocated_buffers))) {
- struct binder_buffer *buffer;
-
- buffer = rb_entry(n, struct binder_buffer, rb_node);
-
- t = buffer->transaction;
- if (t) {
- t->buffer = NULL;
- buffer->transaction = NULL;
- pr_err("release proc %d, transaction %d, not freed\n",
- proc->pid, t->debug_id);
- /*BUG();*/
- }
-
- binder_free_buf(proc, buffer);
- buffers++;
- }
-
- binder_stats_deleted(BINDER_STAT_PROC);
-
- page_count = 0;
- if (proc->pages) {
- int i;
-
- for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) {
- void *page_addr;
-
- if (!proc->pages[i])
- continue;
-
- page_addr = proc->buffer + i * PAGE_SIZE;
- binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
- "%s: %d: page %d at %p not freed\n",
- __func__, proc->pid, i, page_addr);
- unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
- __free_page(proc->pages[i]);
- page_count++;
- }
- kfree(proc->pages);
- vfree(proc->buffer);
- }
-
- put_task_struct(proc->tsk);
-
- binder_debug(BINDER_DEBUG_OPEN_CLOSE,
- "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n",
- __func__, proc->pid, threads, nodes, incoming_refs,
- outgoing_refs, active_transactions, buffers, page_count);
-
- kfree(proc);
-}
-
-static void binder_deferred_func(struct work_struct *work)
-{
- struct binder_proc *proc;
- struct files_struct *files;
-
- int defer;
-
- do {
- binder_lock(__func__);
- mutex_lock(&binder_deferred_lock);
- if (!hlist_empty(&binder_deferred_list)) {
- proc = hlist_entry(binder_deferred_list.first,
- struct binder_proc, deferred_work_node);
- hlist_del_init(&proc->deferred_work_node);
- defer = proc->deferred_work;
- proc->deferred_work = 0;
- } else {
- proc = NULL;
- defer = 0;
- }
- mutex_unlock(&binder_deferred_lock);
-
- files = NULL;
- if (defer & BINDER_DEFERRED_PUT_FILES) {
- files = proc->files;
- if (files)
- proc->files = NULL;
- }
-
- if (defer & BINDER_DEFERRED_FLUSH)
- binder_deferred_flush(proc);
-
- if (defer & BINDER_DEFERRED_RELEASE)
- binder_deferred_release(proc); /* frees proc */
-
- binder_unlock(__func__);
- if (files)
- put_files_struct(files);
- } while (proc);
-}
-static DECLARE_WORK(binder_deferred_work, binder_deferred_func);
-
-static void
-binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer)
-{
- mutex_lock(&binder_deferred_lock);
- proc->deferred_work |= defer;
- if (hlist_unhashed(&proc->deferred_work_node)) {
- hlist_add_head(&proc->deferred_work_node,
- &binder_deferred_list);
- queue_work(binder_deferred_workqueue, &binder_deferred_work);
- }
- mutex_unlock(&binder_deferred_lock);
-}
-
-static void print_binder_transaction(struct seq_file *m, const char *prefix,
- struct binder_transaction *t)
-{
- seq_printf(m,
- "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d",
- prefix, t->debug_id, t,
- t->from ? t->from->proc->pid : 0,
- t->from ? t->from->pid : 0,
- t->to_proc ? t->to_proc->pid : 0,
- t->to_thread ? t->to_thread->pid : 0,
- t->code, t->flags, t->priority, t->need_reply);
- if (t->buffer == NULL) {
- seq_puts(m, " buffer free\n");
- return;
- }
- if (t->buffer->target_node)
- seq_printf(m, " node %d",
- t->buffer->target_node->debug_id);
- seq_printf(m, " size %zd:%zd data %p\n",
- t->buffer->data_size, t->buffer->offsets_size,
- t->buffer->data);
-}
-
-static void print_binder_buffer(struct seq_file *m, const char *prefix,
- struct binder_buffer *buffer)
-{
- seq_printf(m, "%s %d: %p size %zd:%zd %s\n",
- prefix, buffer->debug_id, buffer->data,
- buffer->data_size, buffer->offsets_size,
- buffer->transaction ? "active" : "delivered");
-}
-
-static void print_binder_work(struct seq_file *m, const char *prefix,
- const char *transaction_prefix,
- struct binder_work *w)
-{
- struct binder_node *node;
- struct binder_transaction *t;
-
- switch (w->type) {
- case BINDER_WORK_TRANSACTION:
- t = container_of(w, struct binder_transaction, work);
- print_binder_transaction(m, transaction_prefix, t);
- break;
- case BINDER_WORK_TRANSACTION_COMPLETE:
- seq_printf(m, "%stransaction complete\n", prefix);
- break;
- case BINDER_WORK_NODE:
- node = container_of(w, struct binder_node, work);
- seq_printf(m, "%snode work %d: u%016llx c%016llx\n",
- prefix, node->debug_id,
- (u64)node->ptr, (u64)node->cookie);
- break;
- case BINDER_WORK_DEAD_BINDER:
- seq_printf(m, "%shas dead binder\n", prefix);
- break;
- case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
- seq_printf(m, "%shas cleared dead binder\n", prefix);
- break;
- case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
- seq_printf(m, "%shas cleared death notification\n", prefix);
- break;
- default:
- seq_printf(m, "%sunknown work: type %d\n", prefix, w->type);
- break;
- }
-}
-
-static void print_binder_thread(struct seq_file *m,
- struct binder_thread *thread,
- int print_always)
-{
- struct binder_transaction *t;
- struct binder_work *w;
- size_t start_pos = m->count;
- size_t header_pos;
-
- seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper);
- header_pos = m->count;
- t = thread->transaction_stack;
- while (t) {
- if (t->from == thread) {
- print_binder_transaction(m,
- " outgoing transaction", t);
- t = t->from_parent;
- } else if (t->to_thread == thread) {
- print_binder_transaction(m,
- " incoming transaction", t);
- t = t->to_parent;
- } else {
- print_binder_transaction(m, " bad transaction", t);
- t = NULL;
- }
- }
- list_for_each_entry(w, &thread->todo, entry) {
- print_binder_work(m, " ", " pending transaction", w);
- }
- if (!print_always && m->count == header_pos)
- m->count = start_pos;
-}
-
-static void print_binder_node(struct seq_file *m, struct binder_node *node)
-{
- struct binder_ref *ref;
- struct binder_work *w;
- int count;
-
- count = 0;
- hlist_for_each_entry(ref, &node->refs, node_entry)
- count++;
-
- seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d",
- node->debug_id, (u64)node->ptr, (u64)node->cookie,
- node->has_strong_ref, node->has_weak_ref,
- node->local_strong_refs, node->local_weak_refs,
- node->internal_strong_refs, count);
- if (count) {
- seq_puts(m, " proc");
- hlist_for_each_entry(ref, &node->refs, node_entry)
- seq_printf(m, " %d", ref->proc->pid);
- }
- seq_puts(m, "\n");
- list_for_each_entry(w, &node->async_todo, entry)
- print_binder_work(m, " ",
- " pending async transaction", w);
-}
-
-static void print_binder_ref(struct seq_file *m, struct binder_ref *ref)
-{
- seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n",
- ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ",
- ref->node->debug_id, ref->strong, ref->weak, ref->death);
-}
-
-static void print_binder_proc(struct seq_file *m,
- struct binder_proc *proc, int print_all)
-{
- struct binder_work *w;
- struct rb_node *n;
- size_t start_pos = m->count;
- size_t header_pos;
-
- seq_printf(m, "proc %d\n", proc->pid);
- header_pos = m->count;
-
- for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
- print_binder_thread(m, rb_entry(n, struct binder_thread,
- rb_node), print_all);
- for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
- struct binder_node *node = rb_entry(n, struct binder_node,
- rb_node);
- if (print_all || node->has_async_transaction)
- print_binder_node(m, node);
- }
- if (print_all) {
- for (n = rb_first(&proc->refs_by_desc);
- n != NULL;
- n = rb_next(n))
- print_binder_ref(m, rb_entry(n, struct binder_ref,
- rb_node_desc));
- }
- for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
- print_binder_buffer(m, " buffer",
- rb_entry(n, struct binder_buffer, rb_node));
- list_for_each_entry(w, &proc->todo, entry)
- print_binder_work(m, " ", " pending transaction", w);
- list_for_each_entry(w, &proc->delivered_death, entry) {
- seq_puts(m, " has delivered dead binder\n");
- break;
- }
- if (!print_all && m->count == header_pos)
- m->count = start_pos;
-}
-
-static const char * const binder_return_strings[] = {
- "BR_ERROR",
- "BR_OK",
- "BR_TRANSACTION",
- "BR_REPLY",
- "BR_ACQUIRE_RESULT",
- "BR_DEAD_REPLY",
- "BR_TRANSACTION_COMPLETE",
- "BR_INCREFS",
- "BR_ACQUIRE",
- "BR_RELEASE",
- "BR_DECREFS",
- "BR_ATTEMPT_ACQUIRE",
- "BR_NOOP",
- "BR_SPAWN_LOOPER",
- "BR_FINISHED",
- "BR_DEAD_BINDER",
- "BR_CLEAR_DEATH_NOTIFICATION_DONE",
- "BR_FAILED_REPLY"
-};
-
-static const char * const binder_command_strings[] = {
- "BC_TRANSACTION",
- "BC_REPLY",
- "BC_ACQUIRE_RESULT",
- "BC_FREE_BUFFER",
- "BC_INCREFS",
- "BC_ACQUIRE",
- "BC_RELEASE",
- "BC_DECREFS",
- "BC_INCREFS_DONE",
- "BC_ACQUIRE_DONE",
- "BC_ATTEMPT_ACQUIRE",
- "BC_REGISTER_LOOPER",
- "BC_ENTER_LOOPER",
- "BC_EXIT_LOOPER",
- "BC_REQUEST_DEATH_NOTIFICATION",
- "BC_CLEAR_DEATH_NOTIFICATION",
- "BC_DEAD_BINDER_DONE"
-};
-
-static const char * const binder_objstat_strings[] = {
- "proc",
- "thread",
- "node",
- "ref",
- "death",
- "transaction",
- "transaction_complete"
-};
-
-static void print_binder_stats(struct seq_file *m, const char *prefix,
- struct binder_stats *stats)
-{
- int i;
-
- BUILD_BUG_ON(ARRAY_SIZE(stats->bc) !=
- ARRAY_SIZE(binder_command_strings));
- for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
- if (stats->bc[i])
- seq_printf(m, "%s%s: %d\n", prefix,
- binder_command_strings[i], stats->bc[i]);
- }
-
- BUILD_BUG_ON(ARRAY_SIZE(stats->br) !=
- ARRAY_SIZE(binder_return_strings));
- for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
- if (stats->br[i])
- seq_printf(m, "%s%s: %d\n", prefix,
- binder_return_strings[i], stats->br[i]);
- }
-
- BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
- ARRAY_SIZE(binder_objstat_strings));
- BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
- ARRAY_SIZE(stats->obj_deleted));
- for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
- if (stats->obj_created[i] || stats->obj_deleted[i])
- seq_printf(m, "%s%s: active %d total %d\n", prefix,
- binder_objstat_strings[i],
- stats->obj_created[i] - stats->obj_deleted[i],
- stats->obj_created[i]);
- }
-}
-
-static void print_binder_proc_stats(struct seq_file *m,
- struct binder_proc *proc)
-{
- struct binder_work *w;
- struct rb_node *n;
- int count, strong, weak;
-
- seq_printf(m, "proc %d\n", proc->pid);
- count = 0;
- for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
- count++;
- seq_printf(m, " threads: %d\n", count);
- seq_printf(m, " requested threads: %d+%d/%d\n"
- " ready threads %d\n"
- " free async space %zd\n", proc->requested_threads,
- proc->requested_threads_started, proc->max_threads,
- proc->ready_threads, proc->free_async_space);
- count = 0;
- for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
- count++;
- seq_printf(m, " nodes: %d\n", count);
- count = 0;
- strong = 0;
- weak = 0;
- for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
- struct binder_ref *ref = rb_entry(n, struct binder_ref,
- rb_node_desc);
- count++;
- strong += ref->strong;
- weak += ref->weak;
- }
- seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak);
-
- count = 0;
- for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
- count++;
- seq_printf(m, " buffers: %d\n", count);
-
- count = 0;
- list_for_each_entry(w, &proc->todo, entry) {
- switch (w->type) {
- case BINDER_WORK_TRANSACTION:
- count++;
- break;
- default:
- break;
- }
- }
- seq_printf(m, " pending transactions: %d\n", count);
-
- print_binder_stats(m, " ", &proc->stats);
-}
-
-
-static int binder_state_show(struct seq_file *m, void *unused)
-{
- struct binder_proc *proc;
- struct binder_node *node;
- int do_lock = !binder_debug_no_lock;
-
- if (do_lock)
- binder_lock(__func__);
-
- seq_puts(m, "binder state:\n");
-
- if (!hlist_empty(&binder_dead_nodes))
- seq_puts(m, "dead nodes:\n");
- hlist_for_each_entry(node, &binder_dead_nodes, dead_node)
- print_binder_node(m, node);
-
- hlist_for_each_entry(proc, &binder_procs, proc_node)
- print_binder_proc(m, proc, 1);
- if (do_lock)
- binder_unlock(__func__);
- return 0;
-}
-
-static int binder_stats_show(struct seq_file *m, void *unused)
-{
- struct binder_proc *proc;
- int do_lock = !binder_debug_no_lock;
-
- if (do_lock)
- binder_lock(__func__);
-
- seq_puts(m, "binder stats:\n");
-
- print_binder_stats(m, "", &binder_stats);
-
- hlist_for_each_entry(proc, &binder_procs, proc_node)
- print_binder_proc_stats(m, proc);
- if (do_lock)
- binder_unlock(__func__);
- return 0;
-}
-
-static int binder_transactions_show(struct seq_file *m, void *unused)
-{
- struct binder_proc *proc;
- int do_lock = !binder_debug_no_lock;
-
- if (do_lock)
- binder_lock(__func__);
-
- seq_puts(m, "binder transactions:\n");
- hlist_for_each_entry(proc, &binder_procs, proc_node)
- print_binder_proc(m, proc, 0);
- if (do_lock)
- binder_unlock(__func__);
- return 0;
-}
-
-static int binder_proc_show(struct seq_file *m, void *unused)
-{
- struct binder_proc *proc = m->private;
- int do_lock = !binder_debug_no_lock;
-
- if (do_lock)
- binder_lock(__func__);
- seq_puts(m, "binder proc state:\n");
- print_binder_proc(m, proc, 1);
- if (do_lock)
- binder_unlock(__func__);
- return 0;
-}
-
-static void print_binder_transaction_log_entry(struct seq_file *m,
- struct binder_transaction_log_entry *e)
-{
- seq_printf(m,
- "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n",
- e->debug_id, (e->call_type == 2) ? "reply" :
- ((e->call_type == 1) ? "async" : "call "), e->from_proc,
- e->from_thread, e->to_proc, e->to_thread, e->to_node,
- e->target_handle, e->data_size, e->offsets_size);
-}
-
-static int binder_transaction_log_show(struct seq_file *m, void *unused)
-{
- struct binder_transaction_log *log = m->private;
- int i;
-
- if (log->full) {
- for (i = log->next; i < ARRAY_SIZE(log->entry); i++)
- print_binder_transaction_log_entry(m, &log->entry[i]);
- }
- for (i = 0; i < log->next; i++)
- print_binder_transaction_log_entry(m, &log->entry[i]);
- return 0;
-}
-
-static const struct file_operations binder_fops = {
- .owner = THIS_MODULE,
- .poll = binder_poll,
- .unlocked_ioctl = binder_ioctl,
- .compat_ioctl = binder_ioctl,
- .mmap = binder_mmap,
- .open = binder_open,
- .flush = binder_flush,
- .release = binder_release,
-};
-
-static struct miscdevice binder_miscdev = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "binder",
- .fops = &binder_fops
-};
-
-BINDER_DEBUG_ENTRY(state);
-BINDER_DEBUG_ENTRY(stats);
-BINDER_DEBUG_ENTRY(transactions);
-BINDER_DEBUG_ENTRY(transaction_log);
-
-static int __init binder_init(void)
-{
- int ret;
-
- binder_deferred_workqueue = create_singlethread_workqueue("binder");
- if (!binder_deferred_workqueue)
- return -ENOMEM;
-
- binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL);
- if (binder_debugfs_dir_entry_root)
- binder_debugfs_dir_entry_proc = debugfs_create_dir("proc",
- binder_debugfs_dir_entry_root);
- ret = misc_register(&binder_miscdev);
- if (binder_debugfs_dir_entry_root) {
- debugfs_create_file("state",
- S_IRUGO,
- binder_debugfs_dir_entry_root,
- NULL,
- &binder_state_fops);
- debugfs_create_file("stats",
- S_IRUGO,
- binder_debugfs_dir_entry_root,
- NULL,
- &binder_stats_fops);
- debugfs_create_file("transactions",
- S_IRUGO,
- binder_debugfs_dir_entry_root,
- NULL,
- &binder_transactions_fops);
- debugfs_create_file("transaction_log",
- S_IRUGO,
- binder_debugfs_dir_entry_root,
- &binder_transaction_log,
- &binder_transaction_log_fops);
- debugfs_create_file("failed_transaction_log",
- S_IRUGO,
- binder_debugfs_dir_entry_root,
- &binder_transaction_log_failed,
- &binder_transaction_log_fops);
- }
- return ret;
-}
-
-device_initcall(binder_init);
-
-#define CREATE_TRACE_POINTS
-#include "binder_trace.h"
-
-MODULE_LICENSE("GPL v2");
+++ /dev/null
-/*
- * Copyright (C) 2008 Google, Inc.
- *
- * Based on, but no longer compatible with, the original
- * OpenBinder.org binder driver interface, which is:
- *
- * Copyright (c) 2005 Palmsource, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _LINUX_BINDER_H
-#define _LINUX_BINDER_H
-
-#ifdef CONFIG_ANDROID_BINDER_IPC_32BIT
-#define BINDER_IPC_32BIT 1
-#endif
-
-#include "uapi/binder.h"
-
-#endif /* _LINUX_BINDER_H */
-
+++ /dev/null
-/*
- * Copyright (C) 2012 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM binder
-
-#if !defined(_BINDER_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
-#define _BINDER_TRACE_H
-
-#include <linux/tracepoint.h>
-
-struct binder_buffer;
-struct binder_node;
-struct binder_proc;
-struct binder_ref;
-struct binder_thread;
-struct binder_transaction;
-
-TRACE_EVENT(binder_ioctl,
- TP_PROTO(unsigned int cmd, unsigned long arg),
- TP_ARGS(cmd, arg),
-
- TP_STRUCT__entry(
- __field(unsigned int, cmd)
- __field(unsigned long, arg)
- ),
- TP_fast_assign(
- __entry->cmd = cmd;
- __entry->arg = arg;
- ),
- TP_printk("cmd=0x%x arg=0x%lx", __entry->cmd, __entry->arg)
-);
-
-DECLARE_EVENT_CLASS(binder_lock_class,
- TP_PROTO(const char *tag),
- TP_ARGS(tag),
- TP_STRUCT__entry(
- __field(const char *, tag)
- ),
- TP_fast_assign(
- __entry->tag = tag;
- ),
- TP_printk("tag=%s", __entry->tag)
-);
-
-#define DEFINE_BINDER_LOCK_EVENT(name) \
-DEFINE_EVENT(binder_lock_class, name, \
- TP_PROTO(const char *func), \
- TP_ARGS(func))
-
-DEFINE_BINDER_LOCK_EVENT(binder_lock);
-DEFINE_BINDER_LOCK_EVENT(binder_locked);
-DEFINE_BINDER_LOCK_EVENT(binder_unlock);
-
-DECLARE_EVENT_CLASS(binder_function_return_class,
- TP_PROTO(int ret),
- TP_ARGS(ret),
- TP_STRUCT__entry(
- __field(int, ret)
- ),
- TP_fast_assign(
- __entry->ret = ret;
- ),
- TP_printk("ret=%d", __entry->ret)
-);
-
-#define DEFINE_BINDER_FUNCTION_RETURN_EVENT(name) \
-DEFINE_EVENT(binder_function_return_class, name, \
- TP_PROTO(int ret), \
- TP_ARGS(ret))
-
-DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_ioctl_done);
-DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_write_done);
-DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_read_done);
-
-TRACE_EVENT(binder_wait_for_work,
- TP_PROTO(bool proc_work, bool transaction_stack, bool thread_todo),
- TP_ARGS(proc_work, transaction_stack, thread_todo),
-
- TP_STRUCT__entry(
- __field(bool, proc_work)
- __field(bool, transaction_stack)
- __field(bool, thread_todo)
- ),
- TP_fast_assign(
- __entry->proc_work = proc_work;
- __entry->transaction_stack = transaction_stack;
- __entry->thread_todo = thread_todo;
- ),
- TP_printk("proc_work=%d transaction_stack=%d thread_todo=%d",
- __entry->proc_work, __entry->transaction_stack,
- __entry->thread_todo)
-);
-
-TRACE_EVENT(binder_transaction,
- TP_PROTO(bool reply, struct binder_transaction *t,
- struct binder_node *target_node),
- TP_ARGS(reply, t, target_node),
- TP_STRUCT__entry(
- __field(int, debug_id)
- __field(int, target_node)
- __field(int, to_proc)
- __field(int, to_thread)
- __field(int, reply)
- __field(unsigned int, code)
- __field(unsigned int, flags)
- ),
- TP_fast_assign(
- __entry->debug_id = t->debug_id;
- __entry->target_node = target_node ? target_node->debug_id : 0;
- __entry->to_proc = t->to_proc->pid;
- __entry->to_thread = t->to_thread ? t->to_thread->pid : 0;
- __entry->reply = reply;
- __entry->code = t->code;
- __entry->flags = t->flags;
- ),
- TP_printk("transaction=%d dest_node=%d dest_proc=%d dest_thread=%d reply=%d flags=0x%x code=0x%x",
- __entry->debug_id, __entry->target_node,
- __entry->to_proc, __entry->to_thread,
- __entry->reply, __entry->flags, __entry->code)
-);
-
-TRACE_EVENT(binder_transaction_received,
- TP_PROTO(struct binder_transaction *t),
- TP_ARGS(t),
-
- TP_STRUCT__entry(
- __field(int, debug_id)
- ),
- TP_fast_assign(
- __entry->debug_id = t->debug_id;
- ),
- TP_printk("transaction=%d", __entry->debug_id)
-);
-
-TRACE_EVENT(binder_transaction_node_to_ref,
- TP_PROTO(struct binder_transaction *t, struct binder_node *node,
- struct binder_ref *ref),
- TP_ARGS(t, node, ref),
-
- TP_STRUCT__entry(
- __field(int, debug_id)
- __field(int, node_debug_id)
- __field(binder_uintptr_t, node_ptr)
- __field(int, ref_debug_id)
- __field(uint32_t, ref_desc)
- ),
- TP_fast_assign(
- __entry->debug_id = t->debug_id;
- __entry->node_debug_id = node->debug_id;
- __entry->node_ptr = node->ptr;
- __entry->ref_debug_id = ref->debug_id;
- __entry->ref_desc = ref->desc;
- ),
- TP_printk("transaction=%d node=%d src_ptr=0x%016llx ==> dest_ref=%d dest_desc=%d",
- __entry->debug_id, __entry->node_debug_id,
- (u64)__entry->node_ptr,
- __entry->ref_debug_id, __entry->ref_desc)
-);
-
-TRACE_EVENT(binder_transaction_ref_to_node,
- TP_PROTO(struct binder_transaction *t, struct binder_ref *ref),
- TP_ARGS(t, ref),
-
- TP_STRUCT__entry(
- __field(int, debug_id)
- __field(int, ref_debug_id)
- __field(uint32_t, ref_desc)
- __field(int, node_debug_id)
- __field(binder_uintptr_t, node_ptr)
- ),
- TP_fast_assign(
- __entry->debug_id = t->debug_id;
- __entry->ref_debug_id = ref->debug_id;
- __entry->ref_desc = ref->desc;
- __entry->node_debug_id = ref->node->debug_id;
- __entry->node_ptr = ref->node->ptr;
- ),
- TP_printk("transaction=%d node=%d src_ref=%d src_desc=%d ==> dest_ptr=0x%016llx",
- __entry->debug_id, __entry->node_debug_id,
- __entry->ref_debug_id, __entry->ref_desc,
- (u64)__entry->node_ptr)
-);
-
-TRACE_EVENT(binder_transaction_ref_to_ref,
- TP_PROTO(struct binder_transaction *t, struct binder_ref *src_ref,
- struct binder_ref *dest_ref),
- TP_ARGS(t, src_ref, dest_ref),
-
- TP_STRUCT__entry(
- __field(int, debug_id)
- __field(int, node_debug_id)
- __field(int, src_ref_debug_id)
- __field(uint32_t, src_ref_desc)
- __field(int, dest_ref_debug_id)
- __field(uint32_t, dest_ref_desc)
- ),
- TP_fast_assign(
- __entry->debug_id = t->debug_id;
- __entry->node_debug_id = src_ref->node->debug_id;
- __entry->src_ref_debug_id = src_ref->debug_id;
- __entry->src_ref_desc = src_ref->desc;
- __entry->dest_ref_debug_id = dest_ref->debug_id;
- __entry->dest_ref_desc = dest_ref->desc;
- ),
- TP_printk("transaction=%d node=%d src_ref=%d src_desc=%d ==> dest_ref=%d dest_desc=%d",
- __entry->debug_id, __entry->node_debug_id,
- __entry->src_ref_debug_id, __entry->src_ref_desc,
- __entry->dest_ref_debug_id, __entry->dest_ref_desc)
-);
-
-TRACE_EVENT(binder_transaction_fd,
- TP_PROTO(struct binder_transaction *t, int src_fd, int dest_fd),
- TP_ARGS(t, src_fd, dest_fd),
-
- TP_STRUCT__entry(
- __field(int, debug_id)
- __field(int, src_fd)
- __field(int, dest_fd)
- ),
- TP_fast_assign(
- __entry->debug_id = t->debug_id;
- __entry->src_fd = src_fd;
- __entry->dest_fd = dest_fd;
- ),
- TP_printk("transaction=%d src_fd=%d ==> dest_fd=%d",
- __entry->debug_id, __entry->src_fd, __entry->dest_fd)
-);
-
-DECLARE_EVENT_CLASS(binder_buffer_class,
- TP_PROTO(struct binder_buffer *buf),
- TP_ARGS(buf),
- TP_STRUCT__entry(
- __field(int, debug_id)
- __field(size_t, data_size)
- __field(size_t, offsets_size)
- ),
- TP_fast_assign(
- __entry->debug_id = buf->debug_id;
- __entry->data_size = buf->data_size;
- __entry->offsets_size = buf->offsets_size;
- ),
- TP_printk("transaction=%d data_size=%zd offsets_size=%zd",
- __entry->debug_id, __entry->data_size, __entry->offsets_size)
-);
-
-DEFINE_EVENT(binder_buffer_class, binder_transaction_alloc_buf,
- TP_PROTO(struct binder_buffer *buffer),
- TP_ARGS(buffer));
-
-DEFINE_EVENT(binder_buffer_class, binder_transaction_buffer_release,
- TP_PROTO(struct binder_buffer *buffer),
- TP_ARGS(buffer));
-
-DEFINE_EVENT(binder_buffer_class, binder_transaction_failed_buffer_release,
- TP_PROTO(struct binder_buffer *buffer),
- TP_ARGS(buffer));
-
-TRACE_EVENT(binder_update_page_range,
- TP_PROTO(struct binder_proc *proc, bool allocate,
- void *start, void *end),
- TP_ARGS(proc, allocate, start, end),
- TP_STRUCT__entry(
- __field(int, proc)
- __field(bool, allocate)
- __field(size_t, offset)
- __field(size_t, size)
- ),
- TP_fast_assign(
- __entry->proc = proc->pid;
- __entry->allocate = allocate;
- __entry->offset = start - proc->buffer;
- __entry->size = end - start;
- ),
- TP_printk("proc=%d allocate=%d offset=%zu size=%zu",
- __entry->proc, __entry->allocate,
- __entry->offset, __entry->size)
-);
-
-TRACE_EVENT(binder_command,
- TP_PROTO(uint32_t cmd),
- TP_ARGS(cmd),
- TP_STRUCT__entry(
- __field(uint32_t, cmd)
- ),
- TP_fast_assign(
- __entry->cmd = cmd;
- ),
- TP_printk("cmd=0x%x %s",
- __entry->cmd,
- _IOC_NR(__entry->cmd) < ARRAY_SIZE(binder_command_strings) ?
- binder_command_strings[_IOC_NR(__entry->cmd)] :
- "unknown")
-);
-
-TRACE_EVENT(binder_return,
- TP_PROTO(uint32_t cmd),
- TP_ARGS(cmd),
- TP_STRUCT__entry(
- __field(uint32_t, cmd)
- ),
- TP_fast_assign(
- __entry->cmd = cmd;
- ),
- TP_printk("cmd=0x%x %s",
- __entry->cmd,
- _IOC_NR(__entry->cmd) < ARRAY_SIZE(binder_return_strings) ?
- binder_return_strings[_IOC_NR(__entry->cmd)] :
- "unknown")
-);
-
-#endif /* _BINDER_TRACE_H */
-
-#undef TRACE_INCLUDE_PATH
-#undef TRACE_INCLUDE_FILE
-#define TRACE_INCLUDE_PATH .
-#define TRACE_INCLUDE_FILE binder_trace
-#include <trace/define_trace.h>
+++ /dev/null
-/*
- * Copyright (C) 2008 Google, Inc.
- *
- * Based on, but no longer compatible with, the original
- * OpenBinder.org binder driver interface, which is:
- *
- * Copyright (c) 2005 Palmsource, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_BINDER_H
-#define _UAPI_LINUX_BINDER_H
-
-#include <linux/ioctl.h>
-
-#define B_PACK_CHARS(c1, c2, c3, c4) \
- ((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4))
-#define B_TYPE_LARGE 0x85
-
-enum {
- BINDER_TYPE_BINDER = B_PACK_CHARS('s', 'b', '*', B_TYPE_LARGE),
- BINDER_TYPE_WEAK_BINDER = B_PACK_CHARS('w', 'b', '*', B_TYPE_LARGE),
- BINDER_TYPE_HANDLE = B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE),
- BINDER_TYPE_WEAK_HANDLE = B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE),
- BINDER_TYPE_FD = B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE),
-};
-
-enum {
- FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff,
- FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100,
-};
-
-#ifdef BINDER_IPC_32BIT
-typedef __u32 binder_size_t;
-typedef __u32 binder_uintptr_t;
-#else
-typedef __u64 binder_size_t;
-typedef __u64 binder_uintptr_t;
-#endif
-
-/*
- * This is the flattened representation of a Binder object for transfer
- * between processes. The 'offsets' supplied as part of a binder transaction
- * contains offsets into the data where these structures occur. The Binder
- * driver takes care of re-writing the structure type and data as it moves
- * between processes.
- */
-struct flat_binder_object {
- /* 8 bytes for large_flat_header. */
- __u32 type;
- __u32 flags;
-
- /* 8 bytes of data. */
- union {
- binder_uintptr_t binder; /* local object */
- __u32 handle; /* remote object */
- };
-
- /* extra data associated with local object */
- binder_uintptr_t cookie;
-};
-
-/*
- * On 64-bit platforms where user code may run in 32-bits the driver must
- * translate the buffer (and local binder) addresses appropriately.
- */
-
-struct binder_write_read {
- binder_size_t write_size; /* bytes to write */
- binder_size_t write_consumed; /* bytes consumed by driver */
- binder_uintptr_t write_buffer;
- binder_size_t read_size; /* bytes to read */
- binder_size_t read_consumed; /* bytes consumed by driver */
- binder_uintptr_t read_buffer;
-};
-
-/* Use with BINDER_VERSION, driver fills in fields. */
-struct binder_version {
- /* driver protocol version -- increment with incompatible change */
- __s32 protocol_version;
-};
-
-/* This is the current protocol version. */
-#ifdef BINDER_IPC_32BIT
-#define BINDER_CURRENT_PROTOCOL_VERSION 7
-#else
-#define BINDER_CURRENT_PROTOCOL_VERSION 8
-#endif
-
-#define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read)
-#define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, __s64)
-#define BINDER_SET_MAX_THREADS _IOW('b', 5, __u32)
-#define BINDER_SET_IDLE_PRIORITY _IOW('b', 6, __s32)
-#define BINDER_SET_CONTEXT_MGR _IOW('b', 7, __s32)
-#define BINDER_THREAD_EXIT _IOW('b', 8, __s32)
-#define BINDER_VERSION _IOWR('b', 9, struct binder_version)
-
-/*
- * NOTE: Two special error codes you should check for when calling
- * in to the driver are:
- *
- * EINTR -- The operation has been interupted. This should be
- * handled by retrying the ioctl() until a different error code
- * is returned.
- *
- * ECONNREFUSED -- The driver is no longer accepting operations
- * from your process. That is, the process is being destroyed.
- * You should handle this by exiting from your process. Note
- * that once this error code is returned, all further calls to
- * the driver from any thread will return this same code.
- */
-
-enum transaction_flags {
- TF_ONE_WAY = 0x01, /* this is a one-way call: async, no return */
- TF_ROOT_OBJECT = 0x04, /* contents are the component's root object */
- TF_STATUS_CODE = 0x08, /* contents are a 32-bit status code */
- TF_ACCEPT_FDS = 0x10, /* allow replies with file descriptors */
-};
-
-struct binder_transaction_data {
- /* The first two are only used for bcTRANSACTION and brTRANSACTION,
- * identifying the target and contents of the transaction.
- */
- union {
- /* target descriptor of command transaction */
- __u32 handle;
- /* target descriptor of return transaction */
- binder_uintptr_t ptr;
- } target;
- binder_uintptr_t cookie; /* target object cookie */
- __u32 code; /* transaction command */
-
- /* General information about the transaction. */
- __u32 flags;
- pid_t sender_pid;
- uid_t sender_euid;
- binder_size_t data_size; /* number of bytes of data */
- binder_size_t offsets_size; /* number of bytes of offsets */
-
- /* If this transaction is inline, the data immediately
- * follows here; otherwise, it ends with a pointer to
- * the data buffer.
- */
- union {
- struct {
- /* transaction data */
- binder_uintptr_t buffer;
- /* offsets from buffer to flat_binder_object structs */
- binder_uintptr_t offsets;
- } ptr;
- __u8 buf[8];
- } data;
-};
-
-struct binder_ptr_cookie {
- binder_uintptr_t ptr;
- binder_uintptr_t cookie;
-};
-
-struct binder_handle_cookie {
- __u32 handle;
- binder_uintptr_t cookie;
-} __packed;
-
-struct binder_pri_desc {
- __s32 priority;
- __u32 desc;
-};
-
-struct binder_pri_ptr_cookie {
- __s32 priority;
- binder_uintptr_t ptr;
- binder_uintptr_t cookie;
-};
-
-enum binder_driver_return_protocol {
- BR_ERROR = _IOR('r', 0, __s32),
- /*
- * int: error code
- */
-
- BR_OK = _IO('r', 1),
- /* No parameters! */
-
- BR_TRANSACTION = _IOR('r', 2, struct binder_transaction_data),
- BR_REPLY = _IOR('r', 3, struct binder_transaction_data),
- /*
- * binder_transaction_data: the received command.
- */
-
- BR_ACQUIRE_RESULT = _IOR('r', 4, __s32),
- /*
- * not currently supported
- * int: 0 if the last bcATTEMPT_ACQUIRE was not successful.
- * Else the remote object has acquired a primary reference.
- */
-
- BR_DEAD_REPLY = _IO('r', 5),
- /*
- * The target of the last transaction (either a bcTRANSACTION or
- * a bcATTEMPT_ACQUIRE) is no longer with us. No parameters.
- */
-
- BR_TRANSACTION_COMPLETE = _IO('r', 6),
- /*
- * No parameters... always refers to the last transaction requested
- * (including replies). Note that this will be sent even for
- * asynchronous transactions.
- */
-
- BR_INCREFS = _IOR('r', 7, struct binder_ptr_cookie),
- BR_ACQUIRE = _IOR('r', 8, struct binder_ptr_cookie),
- BR_RELEASE = _IOR('r', 9, struct binder_ptr_cookie),
- BR_DECREFS = _IOR('r', 10, struct binder_ptr_cookie),
- /*
- * void *: ptr to binder
- * void *: cookie for binder
- */
-
- BR_ATTEMPT_ACQUIRE = _IOR('r', 11, struct binder_pri_ptr_cookie),
- /*
- * not currently supported
- * int: priority
- * void *: ptr to binder
- * void *: cookie for binder
- */
-
- BR_NOOP = _IO('r', 12),
- /*
- * No parameters. Do nothing and examine the next command. It exists
- * primarily so that we can replace it with a BR_SPAWN_LOOPER command.
- */
-
- BR_SPAWN_LOOPER = _IO('r', 13),
- /*
- * No parameters. The driver has determined that a process has no
- * threads waiting to service incoming transactions. When a process
- * receives this command, it must spawn a new service thread and
- * register it via bcENTER_LOOPER.
- */
-
- BR_FINISHED = _IO('r', 14),
- /*
- * not currently supported
- * stop threadpool thread
- */
-
- BR_DEAD_BINDER = _IOR('r', 15, binder_uintptr_t),
- /*
- * void *: cookie
- */
- BR_CLEAR_DEATH_NOTIFICATION_DONE = _IOR('r', 16, binder_uintptr_t),
- /*
- * void *: cookie
- */
-
- BR_FAILED_REPLY = _IO('r', 17),
- /*
- * The the last transaction (either a bcTRANSACTION or
- * a bcATTEMPT_ACQUIRE) failed (e.g. out of memory). No parameters.
- */
-};
-
-enum binder_driver_command_protocol {
- BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data),
- BC_REPLY = _IOW('c', 1, struct binder_transaction_data),
- /*
- * binder_transaction_data: the sent command.
- */
-
- BC_ACQUIRE_RESULT = _IOW('c', 2, __s32),
- /*
- * not currently supported
- * int: 0 if the last BR_ATTEMPT_ACQUIRE was not successful.
- * Else you have acquired a primary reference on the object.
- */
-
- BC_FREE_BUFFER = _IOW('c', 3, binder_uintptr_t),
- /*
- * void *: ptr to transaction data received on a read
- */
-
- BC_INCREFS = _IOW('c', 4, __u32),
- BC_ACQUIRE = _IOW('c', 5, __u32),
- BC_RELEASE = _IOW('c', 6, __u32),
- BC_DECREFS = _IOW('c', 7, __u32),
- /*
- * int: descriptor
- */
-
- BC_INCREFS_DONE = _IOW('c', 8, struct binder_ptr_cookie),
- BC_ACQUIRE_DONE = _IOW('c', 9, struct binder_ptr_cookie),
- /*
- * void *: ptr to binder
- * void *: cookie for binder
- */
-
- BC_ATTEMPT_ACQUIRE = _IOW('c', 10, struct binder_pri_desc),
- /*
- * not currently supported
- * int: priority
- * int: descriptor
- */
-
- BC_REGISTER_LOOPER = _IO('c', 11),
- /*
- * No parameters.
- * Register a spawned looper thread with the device.
- */
-
- BC_ENTER_LOOPER = _IO('c', 12),
- BC_EXIT_LOOPER = _IO('c', 13),
- /*
- * No parameters.
- * These two commands are sent as an application-level thread
- * enters and exits the binder loop, respectively. They are
- * used so the binder can have an accurate count of the number
- * of looping threads it has available.
- */
-
- BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14,
- struct binder_handle_cookie),
- /*
- * int: handle
- * void *: cookie
- */
-
- BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15,
- struct binder_handle_cookie),
- /*
- * int: handle
- * void *: cookie
- */
-
- BC_DEAD_BINDER_DONE = _IOW('c', 16, binder_uintptr_t),
- /*
- * void *: cookie
- */
-};
-
-#endif /* _UAPI_LINUX_BINDER_H */
-
# UAPI Header export list
+header-y += android/
header-y += byteorder/
header-y += can/
header-y += caif/
--- /dev/null
+# UAPI Header export list
+header-y += binder.h
--- /dev/null
+/*
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * Based on, but no longer compatible with, the original
+ * OpenBinder.org binder driver interface, which is:
+ *
+ * Copyright (c) 2005 Palmsource, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _UAPI_LINUX_BINDER_H
+#define _UAPI_LINUX_BINDER_H
+
+#include <linux/ioctl.h>
+
+#define B_PACK_CHARS(c1, c2, c3, c4) \
+ ((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4))
+#define B_TYPE_LARGE 0x85
+
+enum {
+ BINDER_TYPE_BINDER = B_PACK_CHARS('s', 'b', '*', B_TYPE_LARGE),
+ BINDER_TYPE_WEAK_BINDER = B_PACK_CHARS('w', 'b', '*', B_TYPE_LARGE),
+ BINDER_TYPE_HANDLE = B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE),
+ BINDER_TYPE_WEAK_HANDLE = B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE),
+ BINDER_TYPE_FD = B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE),
+};
+
+enum {
+ FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff,
+ FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100,
+};
+
+#ifdef BINDER_IPC_32BIT
+typedef __u32 binder_size_t;
+typedef __u32 binder_uintptr_t;
+#else
+typedef __u64 binder_size_t;
+typedef __u64 binder_uintptr_t;
+#endif
+
+/*
+ * This is the flattened representation of a Binder object for transfer
+ * between processes. The 'offsets' supplied as part of a binder transaction
+ * contains offsets into the data where these structures occur. The Binder
+ * driver takes care of re-writing the structure type and data as it moves
+ * between processes.
+ */
+struct flat_binder_object {
+ /* 8 bytes for large_flat_header. */
+ __u32 type;
+ __u32 flags;
+
+ /* 8 bytes of data. */
+ union {
+ binder_uintptr_t binder; /* local object */
+ __u32 handle; /* remote object */
+ };
+
+ /* extra data associated with local object */
+ binder_uintptr_t cookie;
+};
+
+/*
+ * On 64-bit platforms where user code may run in 32-bits the driver must
+ * translate the buffer (and local binder) addresses appropriately.
+ */
+
+struct binder_write_read {
+ binder_size_t write_size; /* bytes to write */
+ binder_size_t write_consumed; /* bytes consumed by driver */
+ binder_uintptr_t write_buffer;
+ binder_size_t read_size; /* bytes to read */
+ binder_size_t read_consumed; /* bytes consumed by driver */
+ binder_uintptr_t read_buffer;
+};
+
+/* Use with BINDER_VERSION, driver fills in fields. */
+struct binder_version {
+ /* driver protocol version -- increment with incompatible change */
+ __s32 protocol_version;
+};
+
+/* This is the current protocol version. */
+#ifdef BINDER_IPC_32BIT
+#define BINDER_CURRENT_PROTOCOL_VERSION 7
+#else
+#define BINDER_CURRENT_PROTOCOL_VERSION 8
+#endif
+
+#define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read)
+#define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, __s64)
+#define BINDER_SET_MAX_THREADS _IOW('b', 5, __u32)
+#define BINDER_SET_IDLE_PRIORITY _IOW('b', 6, __s32)
+#define BINDER_SET_CONTEXT_MGR _IOW('b', 7, __s32)
+#define BINDER_THREAD_EXIT _IOW('b', 8, __s32)
+#define BINDER_VERSION _IOWR('b', 9, struct binder_version)
+
+/*
+ * NOTE: Two special error codes you should check for when calling
+ * in to the driver are:
+ *
+ * EINTR -- The operation has been interupted. This should be
+ * handled by retrying the ioctl() until a different error code
+ * is returned.
+ *
+ * ECONNREFUSED -- The driver is no longer accepting operations
+ * from your process. That is, the process is being destroyed.
+ * You should handle this by exiting from your process. Note
+ * that once this error code is returned, all further calls to
+ * the driver from any thread will return this same code.
+ */
+
+enum transaction_flags {
+ TF_ONE_WAY = 0x01, /* this is a one-way call: async, no return */
+ TF_ROOT_OBJECT = 0x04, /* contents are the component's root object */
+ TF_STATUS_CODE = 0x08, /* contents are a 32-bit status code */
+ TF_ACCEPT_FDS = 0x10, /* allow replies with file descriptors */
+};
+
+struct binder_transaction_data {
+ /* The first two are only used for bcTRANSACTION and brTRANSACTION,
+ * identifying the target and contents of the transaction.
+ */
+ union {
+ /* target descriptor of command transaction */
+ __u32 handle;
+ /* target descriptor of return transaction */
+ binder_uintptr_t ptr;
+ } target;
+ binder_uintptr_t cookie; /* target object cookie */
+ __u32 code; /* transaction command */
+
+ /* General information about the transaction. */
+ __u32 flags;
+ pid_t sender_pid;
+ uid_t sender_euid;
+ binder_size_t data_size; /* number of bytes of data */
+ binder_size_t offsets_size; /* number of bytes of offsets */
+
+ /* If this transaction is inline, the data immediately
+ * follows here; otherwise, it ends with a pointer to
+ * the data buffer.
+ */
+ union {
+ struct {
+ /* transaction data */
+ binder_uintptr_t buffer;
+ /* offsets from buffer to flat_binder_object structs */
+ binder_uintptr_t offsets;
+ } ptr;
+ __u8 buf[8];
+ } data;
+};
+
+struct binder_ptr_cookie {
+ binder_uintptr_t ptr;
+ binder_uintptr_t cookie;
+};
+
+struct binder_handle_cookie {
+ __u32 handle;
+ binder_uintptr_t cookie;
+} __packed;
+
+struct binder_pri_desc {
+ __s32 priority;
+ __u32 desc;
+};
+
+struct binder_pri_ptr_cookie {
+ __s32 priority;
+ binder_uintptr_t ptr;
+ binder_uintptr_t cookie;
+};
+
+enum binder_driver_return_protocol {
+ BR_ERROR = _IOR('r', 0, __s32),
+ /*
+ * int: error code
+ */
+
+ BR_OK = _IO('r', 1),
+ /* No parameters! */
+
+ BR_TRANSACTION = _IOR('r', 2, struct binder_transaction_data),
+ BR_REPLY = _IOR('r', 3, struct binder_transaction_data),
+ /*
+ * binder_transaction_data: the received command.
+ */
+
+ BR_ACQUIRE_RESULT = _IOR('r', 4, __s32),
+ /*
+ * not currently supported
+ * int: 0 if the last bcATTEMPT_ACQUIRE was not successful.
+ * Else the remote object has acquired a primary reference.
+ */
+
+ BR_DEAD_REPLY = _IO('r', 5),
+ /*
+ * The target of the last transaction (either a bcTRANSACTION or
+ * a bcATTEMPT_ACQUIRE) is no longer with us. No parameters.
+ */
+
+ BR_TRANSACTION_COMPLETE = _IO('r', 6),
+ /*
+ * No parameters... always refers to the last transaction requested
+ * (including replies). Note that this will be sent even for
+ * asynchronous transactions.
+ */
+
+ BR_INCREFS = _IOR('r', 7, struct binder_ptr_cookie),
+ BR_ACQUIRE = _IOR('r', 8, struct binder_ptr_cookie),
+ BR_RELEASE = _IOR('r', 9, struct binder_ptr_cookie),
+ BR_DECREFS = _IOR('r', 10, struct binder_ptr_cookie),
+ /*
+ * void *: ptr to binder
+ * void *: cookie for binder
+ */
+
+ BR_ATTEMPT_ACQUIRE = _IOR('r', 11, struct binder_pri_ptr_cookie),
+ /*
+ * not currently supported
+ * int: priority
+ * void *: ptr to binder
+ * void *: cookie for binder
+ */
+
+ BR_NOOP = _IO('r', 12),
+ /*
+ * No parameters. Do nothing and examine the next command. It exists
+ * primarily so that we can replace it with a BR_SPAWN_LOOPER command.
+ */
+
+ BR_SPAWN_LOOPER = _IO('r', 13),
+ /*
+ * No parameters. The driver has determined that a process has no
+ * threads waiting to service incoming transactions. When a process
+ * receives this command, it must spawn a new service thread and
+ * register it via bcENTER_LOOPER.
+ */
+
+ BR_FINISHED = _IO('r', 14),
+ /*
+ * not currently supported
+ * stop threadpool thread
+ */
+
+ BR_DEAD_BINDER = _IOR('r', 15, binder_uintptr_t),
+ /*
+ * void *: cookie
+ */
+ BR_CLEAR_DEATH_NOTIFICATION_DONE = _IOR('r', 16, binder_uintptr_t),
+ /*
+ * void *: cookie
+ */
+
+ BR_FAILED_REPLY = _IO('r', 17),
+ /*
+ * The the last transaction (either a bcTRANSACTION or
+ * a bcATTEMPT_ACQUIRE) failed (e.g. out of memory). No parameters.
+ */
+};
+
+enum binder_driver_command_protocol {
+ BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data),
+ BC_REPLY = _IOW('c', 1, struct binder_transaction_data),
+ /*
+ * binder_transaction_data: the sent command.
+ */
+
+ BC_ACQUIRE_RESULT = _IOW('c', 2, __s32),
+ /*
+ * not currently supported
+ * int: 0 if the last BR_ATTEMPT_ACQUIRE was not successful.
+ * Else you have acquired a primary reference on the object.
+ */
+
+ BC_FREE_BUFFER = _IOW('c', 3, binder_uintptr_t),
+ /*
+ * void *: ptr to transaction data received on a read
+ */
+
+ BC_INCREFS = _IOW('c', 4, __u32),
+ BC_ACQUIRE = _IOW('c', 5, __u32),
+ BC_RELEASE = _IOW('c', 6, __u32),
+ BC_DECREFS = _IOW('c', 7, __u32),
+ /*
+ * int: descriptor
+ */
+
+ BC_INCREFS_DONE = _IOW('c', 8, struct binder_ptr_cookie),
+ BC_ACQUIRE_DONE = _IOW('c', 9, struct binder_ptr_cookie),
+ /*
+ * void *: ptr to binder
+ * void *: cookie for binder
+ */
+
+ BC_ATTEMPT_ACQUIRE = _IOW('c', 10, struct binder_pri_desc),
+ /*
+ * not currently supported
+ * int: priority
+ * int: descriptor
+ */
+
+ BC_REGISTER_LOOPER = _IO('c', 11),
+ /*
+ * No parameters.
+ * Register a spawned looper thread with the device.
+ */
+
+ BC_ENTER_LOOPER = _IO('c', 12),
+ BC_EXIT_LOOPER = _IO('c', 13),
+ /*
+ * No parameters.
+ * These two commands are sent as an application-level thread
+ * enters and exits the binder loop, respectively. They are
+ * used so the binder can have an accurate count of the number
+ * of looping threads it has available.
+ */
+
+ BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14,
+ struct binder_handle_cookie),
+ /*
+ * int: handle
+ * void *: cookie
+ */
+
+ BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15,
+ struct binder_handle_cookie),
+ /*
+ * int: handle
+ * void *: cookie
+ */
+
+ BC_DEAD_BINDER_DONE = _IOW('c', 16, binder_uintptr_t),
+ /*
+ * void *: cookie
+ */
+};
+
+#endif /* _UAPI_LINUX_BINDER_H */
+
projects / openwrt / staging / blogic.git / commitdiff