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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2010-10-17 15:50:19 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2010-10-17 15:57:40 +0300
commit7d08ae3c9205b559f90c3d7a3abba3c6479673c7 (patch)
tree6221ae1b3566569b323fc379fd64e3f00229acad /fs/ubifs/replay.c
parent54dd55a406f6e9cb5ae208f258b907455162e045 (diff)
UBIFS: add a commentary about log recovery
Add a commentary which elaborates that 'ubifs_recover_log_leb()' recovers only the last log LEB, not any. Also remove some unneeded newlines. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs/replay.c')
-rw-r--r--fs/ubifs/replay.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index 730598cf634..7df04ba4878 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -839,6 +839,11 @@ static int replay_log_leb(struct ubifs_info *c, int lnum, int offs, void *sbuf)
if (IS_ERR(sleb)) {
if (PTR_ERR(sleb) != -EUCLEAN || !c->need_recovery)
return PTR_ERR(sleb);
+ /*
+ * Note, the below function will recover this log LEB only if
+ * it is the last, because unclean reboots can possibly corrupt
+ * only the tail of the log.
+ */
sleb = ubifs_recover_log_leb(c, lnum, offs, sbuf);
if (IS_ERR(sleb))
return PTR_ERR(sleb);
@@ -850,7 +855,6 @@ static int replay_log_leb(struct ubifs_info *c, int lnum, int offs, void *sbuf)
}
node = sleb->buf;
-
snod = list_entry(sleb->nodes.next, struct ubifs_scan_node, list);
if (c->cs_sqnum == 0) {
/*
@@ -897,7 +901,6 @@ static int replay_log_leb(struct ubifs_info *c, int lnum, int offs, void *sbuf)
}
list_for_each_entry(snod, &sleb->nodes, list) {
-
cond_resched();
if (snod->sqnum >= SQNUM_WATERMARK) {
@@ -1030,9 +1033,7 @@ int ubifs_replay_journal(struct ubifs_info *c)
return -ENOMEM;
dbg_mnt("start replaying the journal");
-
c->replaying = 1;
-
lnum = c->ltail_lnum = c->lhead_lnum;
offs = c->lhead_offs;