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3 Commits

Author SHA1 Message Date
Adrian Hunter
6dcfac4f13 UBIFS: TNC / GC race fixes 
- update GC sequence number if any nodes may have been moved
even if GC did not finish the LEB
- don't ignore error return when reading

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
 2008-09-17 14:23:26 +03:00
Adrian Hunter
601c0bc467 UBIFS: allow for racing between GC and TNC 
The TNC mutex is unlocked prematurely when reading leaf nodes
with non-hashed keys.  This is unsafe because the node may be
moved by garbage collection and the eraseblock unmapped, although
that has never actually happened during stress testing.

This patch fixes the flaw by detecting the race and retrying with
the TNC mutex locked.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
 2008-08-25 14:34:02 +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