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Artem Bityutskiy 6e0d9fd38b UBIFS: fix master node recovery ... This patch fixes the following symptoms: 1. Unmount UBIFS cleanly. 2. Start mounting UBIFS R/W and have a power cut immediately 3. Start mounting UBIFS R/O, this succeeds 4. Try to re-mount UBIFS R/W - this fails immediately or later on, because UBIFS will write the master node to the flash area which has been written before. The analysis of the problem: 1. UBIFS is unmounted cleanly, both copies of the master node are clean. 2. UBIFS is being mounter R/W, starts changing master node copy 1, and a power cut happens. The copy N1 becomes corrupted. 3. UBIFS is being mounted R/O. It notices the copy N1 is corrupted and reads copy N2. Copy N2 is clean. 4. Because of R/O mode, UBIFS cannot recover copy 1. 5. The mount code (ubifs_mount()) sees that the master node is clean, so it decides that no recovery is needed. 6. We are re-mounting R/W. UBIFS believes no recovery is needed and starts updating the master node, but copy N1 is still corrupted and was not recovered! Fix this problem by marking the master node as dirty every time we recover it and we are in R/O mode. This forces further recovery and the UBIFS cleans-up the corruptions and recovers the copy N1 when re-mounting R/W later. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Cc: stable@kernel.org		14 years ago
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Kconfig	UBIFS: do not select KALLSYMS_ALL	14 years ago
Makefile	…
budget.c	Fix common misspellings	14 years ago
commit.c	UBIFS: do not read flash unnecessarily	14 years ago
compress.c	…
debug.c	UBIFS: fix debugging failure in dbg_check_space_info	14 years ago
debug.h	UBIFS: fix compilation warnings when compiling with gcc 4.5	14 years ago
dir.c	…
file.c	UBIFS: fix oops when R/O file-system is fsync'ed	14 years ago
find.c	…
gc.c	…
io.c	…
ioctl.c	…
journal.c	…
key.h	…
log.c	…
lprops.c	…
lpt.c	UBIFS: fix oops on error path in read_pnode	14 years ago
lpt_commit.c	…
master.c	…
misc.h	…
orphan.c	…
recovery.c	UBIFS: fix master node recovery	14 years ago
replay.c	…
sb.c	…
scan.c	…
shrinker.c	…
super.c	UBIFS: fix false assertion warning in case of I/O failures	14 years ago
tnc.c	…
tnc_commit.c	…
tnc_misc.c	…
ubifs-media.h	…
ubifs.h	…
xattr.c	fs: export empty_aops	14 years ago