GFS2: Take glock reference in examine_bucket()

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We need to check the glock ref counter in a race free way
in order to ensure that the gfs2_glock_hold() call will
succeed. The easiest way to do that is to simply take the
reference count early in the common code of examine_bucket,
skipping any glocks with zero ref count.

That means that the examiner functions all need to put their
reference on the glock once they've performed their function.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Reported-by: David Teigland <teigland@redhat.com>
Tested-by: David Teigland <teigland@redhat.com>

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Steven Whitehouse 2013-08-20 09:35:09 +01:00

parent 7c0ef28a2c

commit 7286b31eab

1 changed files with 5 additions and 7 deletions

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fs/gfs2/glock.c

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