--- /dev/null
+From 8a52e4100d7c3a4a1dfddfa02b8864a9b0068c13 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Sat, 17 May 2014 03:36:18 +0200
+Subject: [PATCH 1/5] ubi: auto-attach mtd device named "ubi" or "data" on boot
+To: openwrt-devel@lists.openwrt.org
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ drivers/mtd/ubi/build.c | 36 ++++++++++++++++++++++++++++++++++++
+ 1 file changed, 36 insertions(+)
+
+diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
+index 6e30a3c..999a36b 100644
+--- a/drivers/mtd/ubi/build.c
++++ b/drivers/mtd/ubi/build.c
+@@ -1209,6 +1209,36 @@ static struct mtd_info * __init open_mtd_device(const char *mtd_dev)
+ return mtd;
+ }
+
++/*
++ * This function tries attaching mtd partitions named either "ubi" or "data"
++ * during boot.
++ */
++static void __init ubi_auto_attach(void)
++{
++ int err;
++ struct mtd_info *mtd;
++ /* try attaching mtd device named "ubi" or "data" */
++ mtd = open_mtd_device("ubi");
++ if (IS_ERR(mtd))
++ mtd = open_mtd_device("data");
++
++ if (!IS_ERR(mtd)) {
++ /* auto-add only media types where UBI makes sense */
++ if (mtd->type == MTD_NANDFLASH ||
++ mtd->type == MTD_DATAFLASH ||
++ mtd->type == MTD_MLCNANDFLASH) {
++ mutex_lock(&ubi_devices_mutex);
++ ubi_msg("auto-attach mtd%d", mtd->index);
++ err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO, 0, 0);
++ mutex_unlock(&ubi_devices_mutex);
++ if (err < 0) {
++ ubi_err("cannot attach mtd%d", mtd->index);
++ put_mtd_device(mtd);
++ }
++ }
++ }
++}
++
+ static int __init ubi_init(void)
+ {
+ int err, i, k;
+@@ -1298,6 +1328,12 @@ static int __init ubi_init(void)
+ }
+ }
+
++ /* auto-attach mtd devices only if built-in to the kernel and no ubi.mtd
++ * parameter was given */
++ if (config_enabled(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
++ !ubi_is_module() && !mtd_devs)
++ ubi_auto_attach();
++
+ err = ubiblock_init();
+ if (err) {
+ ubi_err("block: cannot initialize, error %d", err);
+--
+1.9.2
+
--- /dev/null
+From 0f3966579815f889bb2fcb4846152c35f65e79c4 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Thu, 15 May 2014 21:06:33 +0200
+Subject: [PATCH 2/5] ubi: auto-create ubiblock device for rootfs
+To: openwrt-devel@lists.openwrt.org
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ drivers/mtd/ubi/block.c | 42 ++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 42 insertions(+)
+
+diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
+index 8d659e6..2dbe2f4 100644
+--- a/drivers/mtd/ubi/block.c
++++ b/drivers/mtd/ubi/block.c
+@@ -593,6 +593,44 @@ static int __init ubiblock_create_from_param(void)
+ return ret;
+ }
+
++#define UBIFS_NODE_MAGIC 0x06101831
++static inline int ubi_vol_is_ubifs(struct ubi_volume_desc *desc)
++{
++ int ret;
++ uint32_t magic_of, magic;
++ ret = ubi_read(desc, 0, (char *)&magic_of, 0, 4);
++ if (ret)
++ return 0;
++ magic = le32_to_cpu(magic_of);
++ return magic == UBIFS_NODE_MAGIC;
++}
++
++static void __init ubiblock_create_auto_rootfs(void)
++{
++ int ubi_num, ret, is_ubifs;
++ struct ubi_volume_desc *desc;
++ struct ubi_volume_info vi;
++
++ for (ubi_num = 0; ubi_num < UBI_MAX_DEVICES; ubi_num++) {
++ desc = ubi_open_volume_nm(ubi_num, "rootfs", UBI_READONLY);
++ if (IS_ERR(desc))
++ continue;
++
++ ubi_get_volume_info(desc, &vi);
++ is_ubifs = ubi_vol_is_ubifs(desc);
++ ubi_close_volume(desc);
++ if (is_ubifs)
++ break;
++
++ ret = ubiblock_create(&vi);
++ if (ret)
++ ubi_err("block: can't add '%s' volume, err=%d\n",
++ vi.name, ret);
++ /* always break if we get here */
++ break;
++ }
++}
++
+ static void ubiblock_remove_all(void)
+ {
+ struct ubiblock *next;
+@@ -623,6 +661,10 @@ int __init ubiblock_init(void)
+ if (ret)
+ goto err_remove;
+
++ /* auto-attach "rootfs" volume if existing and non-ubifs */
++ if (config_enabled(CONFIG_MTD_ROOTFS_ROOT_DEV))
++ ubiblock_create_auto_rootfs();
++
+ /*
+ * Block devices are only created upon user requests, so we ignore
+ * existing volumes.
+--
+1.9.2
+
--- /dev/null
+From 248b89b95d27659c5360ef5b68cca21d096ee909 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Sat, 17 May 2014 03:16:54 +0200
+Subject: [PATCH 3/5] ubifs: respect MS_SILENT mount flag
+To: dedekind1@gmail.com,
+ linux-mtd@lists.infradead.org
+
+When attempting to mount a non-ubifs formatted volume, lots of error
+messages (including a stack dump) are thrown to the kernel log even if
+the MS_SILENT mount flag is set.
+Fix this by checking the MS_SILENT flag in ubifs_read_sb_node and
+passing it down to ubifs_read_node, which now got an additional
+parameter for that purpose.
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ fs/ubifs/commit.c | 4 ++--
+ fs/ubifs/io.c | 23 ++++++++++++++---------
+ fs/ubifs/sb.c | 5 +++--
+ fs/ubifs/tnc_misc.c | 4 ++--
+ fs/ubifs/ubifs.h | 2 +-
+ 5 files changed, 22 insertions(+), 16 deletions(-)
+
+diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
+index ff82293..865d13f 100644
+--- a/fs/ubifs/commit.c
++++ b/fs/ubifs/commit.c
+@@ -542,7 +542,7 @@ int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot)
+ if (!idx)
+ return -ENOMEM;
+
+- err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs);
++ err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs, 0);
+ if (err)
+ goto out;
+
+@@ -610,7 +610,7 @@ int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot)
+ list_add_tail(&i->list, &list);
+ /* Read the index node */
+ idx = &i->idx;
+- err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs);
++ err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs, 0);
+ if (err)
+ goto out_free;
+ /* Validate index node */
+diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c
+index e18b988..51c4072 100644
+--- a/fs/ubifs/io.c
++++ b/fs/ubifs/io.c
+@@ -912,7 +912,7 @@ int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
+ if (!overlap) {
+ /* We may safely unlock the write-buffer and read the data */
+ spin_unlock(&wbuf->lock);
+- return ubifs_read_node(c, buf, type, len, lnum, offs);
++ return ubifs_read_node(c, buf, type, len, lnum, offs, 0);
+ }
+
+ /* Don't read under wbuf */
+@@ -966,13 +966,14 @@ out:
+ * @len: node length (not aligned)
+ * @lnum: logical eraseblock number
+ * @offs: offset within the logical eraseblock
++ * @silent: suppress error messages
+ *
+ * This function reads a node of known type and and length, checks it and
+ * stores in @buf. Returns zero in case of success, %-EUCLEAN if CRC mismatched
+ * and a negative error code in case of failure.
+ */
+ int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
+- int lnum, int offs)
++ int lnum, int offs, int silent)
+ {
+ int err, l;
+ struct ubifs_ch *ch = buf;
+@@ -988,30 +989,34 @@ int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
+ return err;
+
+ if (type != ch->node_type) {
+- ubifs_err("bad node type (%d but expected %d)",
++ if (!silent) ubifs_err("bad node type (%d but expected %d)",
+ ch->node_type, type);
+ goto out;
+ }
+
+ err = ubifs_check_node(c, buf, lnum, offs, 0, 0);
+ if (err) {
+- ubifs_err("expected node type %d", type);
++ if (!silent)
++ ubifs_err("expected node type %d", type);
+ return err;
+ }
+
+ l = le32_to_cpu(ch->len);
+ if (l != len) {
+- ubifs_err("bad node length %d, expected %d", l, len);
++ if (!silent)
++ ubifs_err("bad node length %d, expected %d", l, len);
+ goto out;
+ }
+
+ return 0;
+
+ out:
+- ubifs_err("bad node at LEB %d:%d, LEB mapping status %d", lnum, offs,
+- ubi_is_mapped(c->ubi, lnum));
+- ubifs_dump_node(c, buf);
+- dump_stack();
++ if (!silent) {
++ ubifs_err("bad node at LEB %d:%d, LEB mapping status %d", lnum,
++ offs, ubi_is_mapped(c->ubi, lnum));
++ ubifs_dump_node(c, buf);
++ dump_stack();
++ }
+ return -EINVAL;
+ }
+
+diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c
+index 4c37607..b46847d 100644
+--- a/fs/ubifs/sb.c
++++ b/fs/ubifs/sb.c
+@@ -482,14 +482,15 @@ failed:
+ struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c)
+ {
+ struct ubifs_sb_node *sup;
+- int err;
++ int silent, err;
+
+ sup = kmalloc(ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size), GFP_NOFS);
+ if (!sup)
+ return ERR_PTR(-ENOMEM);
+
++ silent = !!(c->vfs_sb->s_flags & MS_SILENT);
+ err = ubifs_read_node(c, sup, UBIFS_SB_NODE, UBIFS_SB_NODE_SZ,
+- UBIFS_SB_LNUM, 0);
++ UBIFS_SB_LNUM, 0, silent);
+ if (err) {
+ kfree(sup);
+ return ERR_PTR(err);
+diff --git a/fs/ubifs/tnc_misc.c b/fs/ubifs/tnc_misc.c
+index f6bf899..e128689 100644
+--- a/fs/ubifs/tnc_misc.c
++++ b/fs/ubifs/tnc_misc.c
+@@ -280,7 +280,7 @@ static int read_znode(struct ubifs_info *c, int lnum, int offs, int len,
+ if (!idx)
+ return -ENOMEM;
+
+- err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs);
++ err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs, 0);
+ if (err < 0) {
+ kfree(idx);
+ return err;
+@@ -472,7 +472,7 @@ int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ zbr->lnum, zbr->offs);
+ else
+ err = ubifs_read_node(c, node, type, zbr->len, zbr->lnum,
+- zbr->offs);
++ zbr->offs, 0);
+
+ if (err) {
+ dbg_tnck(key, "key ");
+diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
+index e8c8cfe..85fdd11 100644
+--- a/fs/ubifs/ubifs.h
++++ b/fs/ubifs/ubifs.h
+@@ -1481,7 +1481,7 @@ int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len);
+ int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs);
+ int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf);
+ int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
+- int lnum, int offs);
++ int lnum, int offs, int silent);
+ int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
+ int lnum, int offs);
+ int ubifs_write_node(struct ubifs_info *c, void *node, int len, int lnum,
+--
+1.9.2
+
projects / openwrt / staging / thess.git / commitdiff