GFS2: Fix writing to non-page aligned gfs2_quota structures

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This is the upstream fix for this bug. This patch differs
from the RHEL5 fix (Red Hat bz #555754) which simply writes to the 8-byte
value field of the quota. In upstream quota code, we're
required to write the entire quota (88 bytes) which can be split
across a page boundary. We check for such quotas, and read/write
the two parts from/to the corresponding pages holding these parts.

With this patch, I don't see the bug anymore using the reproducer
in Red Hat bz 555754. I successfully ran a couple of simple tests/mounts/
umounts and it doesn't seem like this patch breaks anything else.

Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

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Abhijith Das 2010-05-07 17:50:18 -04:00 • committed by Steven Whitehouse

parent 913a71d250

commit 7e619bc3e6

1 changed files with 61 additions and 25 deletions

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fs/gfs2/quota.c

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