UBIFS: allow for racing between GC and TNC

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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>

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This commit is contained in:

Adrian Hunter 2008-08-22 14:23:35 +03:00 • committed by Artem Bityutskiy

parent 761e29f3bb

commit 601c0bc467

4 changed files with 87 additions and 51 deletions

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6

fs/ubifs/gc.c

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17

fs/ubifs/misc.h

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109

fs/ubifs/tnc.c

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6

fs/ubifs/ubifs.h

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