@ -1,100 +1,53 @@
From 248b89b95d27659c5360ef5b68cca21d096ee909 Mon Sep 17 00:00:00 2001
From 90bea5a3f0bf680b87b90516f3c231997f4b8f3b 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.or g
Date: Mon, 2 Jun 2014 15:51:10 +0200
X-Git-Url: http://git.infradead.org/linux-ubifs.git/commitdiff_plain/90bea5a3f0bf680b87b90516f3c231997f4b8f3b
X-Git-Url: https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=90bea5a3f0bf680b87b90516f3c231997f4b8f3b
Subject: UBIFS: respect MS_SILENT mount fla g
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 .
Fix this by introducing adding an additional state-variable in
struct ubifs_info and suppress error messages in ubifs_read_node if
MS_SILENT is set .
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
---
fs/ubifs/io.c | 18 ++++++++++--------
fs/ubifs/super.c | 5 +++++
fs/ubifs/ubifs.h | 11 +++++++++++
3 files changed, 26 insertions(+), 8 deletions(-)
---
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..51c407 2 100644
index e18b988..2290d58 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,
@@ -988,30 +988,32 @@ 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);
- ch->node_type, type);
+ ubifs_errc(c, "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);
+ ubifs_errc(c, "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);
+ ubifs_errc(c, "bad node length %d, expected %d", l, len);
goto out;
}
@ -105,72 +58,71 @@ index e18b988..51c4072 100644
- 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_errc(c, "bad node at LEB %d:%d, LEB mapping status %d", lnum,
+ offs, ubi_is_mapped(c->ubi, lnum));
+ if (!c->probing) {
+ 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;
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index a81c7b5..3904c85 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1149,6 +1149,9 @@ static int mount_ubifs(struct ubifs_info *c)
size_t sz;
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);
c->ro_mount = !!(c->vfs_sb->s_flags & MS_RDONLY);
+ /* Suppress error messages while probing if MS_SILENT is set */
+ c->probing = !!(c->vfs_sb->s_flags & MS_SILENT);
+
err = init_constants_early(c);
if (err)
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);
@@ -1214,6 +1217,8 @@ static int mount_ubifs(struct ubifs_info *c)
if (err)
goto out_free;
if (err) {
dbg_tnck(key, "key ");
+ c->probing = 0;
+
/*
* Make sure the compressor which is set as default in the superblock
* or overridden by mount options is actually compiled in.
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index e8c8cfe..85fdd11 100644
index e8c8cfe..c1f71fe 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
@@ -51,6 +51,15 @@
#define ubifs_warn(fmt, ...) \
pr_warn("UBIFS warning (pid %d): %s: " fmt "\n", \
current->pid, __func__, ##__VA_ARGS__)
+/*
+ * A variant of 'ubifs_err()' which takes the UBIFS file-sytem description
+ * object as an argument.
+ */
+#define ubifs_errc(c, fmt, ...) \
+ do { \
+ if (!(c)->probing) \
+ ubifs_err(fmt, ##__VA_ARGS__); \
+ } while (0)
/* UBIFS file system VFS magic number */
#define UBIFS_SUPER_MAGIC 0x24051905
@@ -1209,6 +1218,7 @@ struct ubifs_debug_info;
* @need_recovery: %1 if the file-system needs recovery
* @replaying: %1 during journal replay
* @mounting: %1 while mounting
+ * @probing: %1 while attempting to mount if MS_SILENT mount flag is set
* @remounting_rw: %1 while re-mounting from R/O mode to R/W mode
* @replay_list: temporary list used during journal replay
* @replay_buds: list of buds to replay
@@ -1441,6 +1451,7 @@ struct ubifs_info {
unsigned int replaying:1;
unsigned int mounting:1;
unsigned int remounting_rw:1;
+ unsigned int probing:1;
struct list_head replay_list;
struct list_head replay_buds;
unsigned long long cs_sqnum;
John Crispin
11 years ago