[PATCH v2] ubifs: respect MS_SILENT mount flag
Daniel Golle
daniel at makrotopia.org
Tue May 27 07:11:08 PDT 2014
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 introducing an additional parameter in ubifs_read_node and
use it to pass down the MS_SILENT flag in ubifs_read_sb_node.
Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
v2: fixed checkpatch.pl issues, not sure about the newline in
fs/ubifs/commit.c:610 which leaves the single 0 looking a bit
lonely...
fs/ubifs/commit.c | 5 +++--
fs/ubifs/io.c | 26 ++++++++++++++++----------
fs/ubifs/sb.c | 5 +++--
fs/ubifs/tnc_misc.c | 4 ++--
fs/ubifs/ubifs.h | 2 +-
5 files changed, 25 insertions(+), 17 deletions(-)
diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
index ff82293..936617f 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 +610,8 @@ 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..8c5dea1 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 +989,35 @@ 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)",
- ch->node_type, type);
+ 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,
--
1.9.3
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