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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2009-08-25 16:22:53 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2009-09-10 12:06:47 +0300
commit0dcd18e4073454daf591e7127247e32ec942b4f3 (patch)
tree2f9e0175bc1af2e841269c19f0a5f65cc22088d7 /fs/ubifs
parent348709bad348d2fd013e1529b4cf5f220717c328 (diff)
downloadlinux-0dcd18e4073454daf591e7127247e32ec942b4f3.tar.bz2
UBIFS: check ubifs_scan error codes better
The 'ubifs_scan()' function returns -EUCLEAN if something is corrupted and recovery is needed, otherwise it returns other error codes. However, in few places UBIFS does not check the error codes and runs recovery. This patch changes this behavior and makes UBIFS start recovery only on -EUCLEAN errors. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Reviewed-by: Adrian Hunter <Adrian.Hunter@nokia.com>
Diffstat (limited to 'fs/ubifs')
-rw-r--r--fs/ubifs/master.c16
-rw-r--r--fs/ubifs/orphan.c3
2 files changed, 14 insertions, 5 deletions
diff --git a/fs/ubifs/master.c b/fs/ubifs/master.c
index 6f95a168a56f..28beaeedadc0 100644
--- a/fs/ubifs/master.c
+++ b/fs/ubifs/master.c
@@ -29,7 +29,8 @@
* @c: UBIFS file-system description object
*
* This function scans the master node LEBs and search for the latest master
- * node. Returns zero in case of success and a negative error code in case of
+ * node. Returns zero in case of success, %-EUCLEAN if there master area is
+ * corrupted and requires recovery, and a negative error code in case of
* failure.
*/
static int scan_for_master(struct ubifs_info *c)
@@ -48,7 +49,7 @@ static int scan_for_master(struct ubifs_info *c)
snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node,
list);
if (snod->type != UBIFS_MST_NODE)
- goto out;
+ goto out_dump;
memcpy(c->mst_node, snod->node, snod->len);
offs = snod->offs;
}
@@ -65,7 +66,7 @@ static int scan_for_master(struct ubifs_info *c)
goto out;
snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node, list);
if (snod->type != UBIFS_MST_NODE)
- goto out;
+ goto out_dump;
if (snod->offs != offs)
goto out;
if (memcmp((void *)c->mst_node + UBIFS_CH_SZ,
@@ -78,6 +79,12 @@ static int scan_for_master(struct ubifs_info *c)
out:
ubifs_scan_destroy(sleb);
+ return -EUCLEAN;
+
+out_dump:
+ ubifs_err("unexpected node type %d master LEB %d:%d",
+ snod->type, lnum, snod->offs);
+ ubifs_scan_destroy(sleb);
return -EINVAL;
}
@@ -256,7 +263,8 @@ int ubifs_read_master(struct ubifs_info *c)
err = scan_for_master(c);
if (err) {
- err = ubifs_recover_master_node(c);
+ if (err == -EUCLEAN)
+ err = ubifs_recover_master_node(c);
if (err)
/*
* Note, we do not free 'c->mst_node' here because the
diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index 3119af3cdc51..82009c74b6a3 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -672,7 +672,8 @@ static int kill_orphans(struct ubifs_info *c)
dbg_rcvry("LEB %d", lnum);
sleb = ubifs_scan(c, lnum, 0, c->sbuf, 1);
if (IS_ERR(sleb)) {
- sleb = ubifs_recover_leb(c, lnum, 0, c->sbuf, 0);
+ if (PTR_ERR(sleb) == -EUCLEAN)
+ sleb = ubifs_recover_leb(c, lnum, 0, c->sbuf, 0);
if (IS_ERR(sleb)) {
err = PTR_ERR(sleb);
break;