Commit graph

11 commits

Author SHA1 Message Date
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
Dan Carpenter
1cfb727107 UBIFS: fix assertion
The asserts here never check anything because it uses '|' instead of
'&'.  Now if the flags are not set it prints a warning a a stack trace.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-06-18 14:17:08 +03:00
Artem Bityutskiy
b137545c44 UBIFS: introduce a separate structure for budgeting info
This patch separates out all the budgeting-related information
from 'struct ubifs_info' to 'struct ubifs_budg_info'. This way the
code looks a bit cleaner. However, the main driver for this is
that we want to save budgeting information and print it later,
so a separate data structure for this is helpful.

This patch is a preparation for the further debugging output
improvements.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-05-13 19:23:53 +03:00
Artem Bityutskiy
3edaae7c5b UBIFS: improve find function interface
Make 'ubifs_find_free_space()' return offset where free space starts,
rather than the amount of free space. This is just more appropriat
for its caller.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2009-03-08 13:29:09 +02:00
Hirofumi Nakagawa
8d47aef43b UBIFS: remove unneeded unlikely()
IS_ERR() macro already has unlikely(), so do not use constructions
like 'if (unlikely(IS_ERR())'.

Signed-off-by: Hirofumi Nakagawa <hnakagawa@miraclelinux.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-09-30 11:12:55 +03:00
Adrian Hunter
6e14968c86 UBIFS: remove incorrect assert
The assert was not valid because one of the variables
'taken_empty_lebs' has transient values out of sync
with the other variables.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-09-17 14:47:09 +03:00
Artem Bityutskiy
131130b9a1 UBIFS: add forgotten gc_idx_lebs component
We add this component at other similar places, but not in this
one.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-31 17:21:31 +03:00
Artem Bityutskiy
ad507653a3 UBIFS: fix assertion
The assertion was incorrect, because it did not take into
account free space.

This patch also amends the comments correspondingly, and
cleans them up a little.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-31 17:21:22 +03:00
Adrian Hunter
3a13252c6f UBIFS: correct spelling of "thrice".
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
2008-08-13 11:39:20 +03:00
Artem Bityutskiy
b364b41aeb UBIFS: reserve more space for index
At the moment UBIFS reserves twice old index size space for the
index. But this is not enough in some cases, because if the indexing
node are very fragmented and there are many small gaps, while the
dirty index has big znodes - in-the-gaps method would fail.

Thus, reserve trise as more, in which case we are guaranteed that
we can commit in any case.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2008-08-13 11:37:28 +03:00
Artem Bityutskiy
1e51764a3c UBIFS: add new flash file system
This is a new flash file system. See
http://www.linux-mtd.infradead.org/doc/ubifs.html

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
2008-07-15 17:35:15 +03:00