linux-hardened/fs/ubifs
Artem Bityutskiy a28ad42a4a UBIFS: fix mounting problems after power cuts
This is a bugfix for a problem with the following symptoms:

1. A power cut happens
2. After reboot, we try to mount UBIFS
3. Mount fails with "No space left on device" error message

UBIFS complains like this:

UBIFS error (pid 28225): grab_empty_leb: could not find an empty LEB

The root cause of this problem is that when we mount, not all LEBs are
categorized. Only those which were read are. However, the
'ubifs_find_free_leb_for_idx()' function assumes that all LEBs were
categorized and 'c->freeable_cnt' is valid, which is a false assumption.

This patch fixes the problem by teaching 'ubifs_find_free_leb_for_idx()'
to always fall back to LPT scanning if no freeable LEBs were found.

This problem was reported by few people in the past, but Brent Taylor
was able to reproduce it and send me a flash image which cannot be mounted,
which made it easy to hunt the bug. Kudos to Brent.

Reported-by: Brent Taylor <motobud@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: stable@vger.kernel.org
2012-10-26 16:26:44 +03:00
..
budget.c No big changes for 3.7 in UBIFS: 2012-10-02 20:47:48 -07:00
commit.c UBIFS: print less 2012-08-31 17:32:58 +03:00
compress.c UBIFS: comply with coding style 2012-08-31 17:32:57 +03:00
debug.c No big changes for 3.7 in UBIFS: 2012-10-02 20:47:48 -07:00
debug.h UBIFS: print less 2012-08-31 17:32:58 +03:00
dir.c UBIFS: comply with coding style 2012-08-31 17:32:57 +03:00
file.c mm: kill vma flag VM_CAN_NONLINEAR 2012-10-09 16:22:17 +09:00
find.c UBIFS: fix mounting problems after power cuts 2012-10-26 16:26:44 +03:00
gc.c UBIFS: comply with coding style 2012-08-31 17:32:57 +03:00
io.c UBI: Kill data type hint 2012-05-20 20:25:59 +03:00
ioctl.c vfs: mnt_drop_write_file() 2012-01-03 22:52:40 -05:00
journal.c userns: Convert ubifs to use kuid/kgid 2012-09-21 03:13:36 -07:00
Kconfig UBIFS: remove Kconfig debugging option 2012-05-16 19:53:46 +03:00
key.h UBIFS: mark unused key objects as invalid 2010-08-30 10:19:08 +03:00
log.c UBIFS: comply with coding style 2012-08-31 17:32:57 +03:00
lprops.c UBIFS: introduce categorized lprops counter 2012-10-26 16:00:26 +03:00
lpt.c UBIFS: print less 2012-08-31 17:32:58 +03:00
lpt_commit.c UBIFS: print less 2012-08-31 17:32:58 +03:00
Makefile UBIFS: remove Kconfig debugging option 2012-05-16 19:53:46 +03:00
master.c UBI: Kill data type hint 2012-05-20 20:25:59 +03:00
misc.h UBIFS: introduce more I/O helpers 2011-07-04 10:54:33 +03:00
orphan.c UBIFS: comply with coding style 2012-08-31 17:32:57 +03:00
recovery.c UBIFS: comply with coding style 2012-08-31 17:32:57 +03:00
replay.c UBIFS: print less 2012-08-31 17:32:58 +03:00
sb.c No big changes for 3.7 in UBIFS: 2012-10-02 20:47:48 -07:00
scan.c UBIFS: comply with coding style 2012-08-31 17:32:57 +03:00
shrinker.c UBIFS: fix shrinker object count reports 2011-06-03 18:12:24 +03:00
super.c No big changes for 3.7 in UBIFS: 2012-10-02 20:47:48 -07:00
tnc.c UBIFS: 2012-05-22 19:30:27 -07:00
tnc_commit.c UBI: Kill data type hint 2012-05-20 20:25:59 +03:00
tnc_misc.c UBIFS: print less 2012-08-31 17:32:58 +03:00
ubifs-media.h UBIFS: add a superblock flag for free space fix-up 2011-05-16 14:12:14 +03:00
ubifs.h UBIFS: introduce categorized lprops counter 2012-10-26 16:00:26 +03:00
xattr.c UBIFS: 2012-05-22 19:30:27 -07:00