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authorAbhijith Das <adas@redhat.com>2010-05-08 01:50:18 +0400
committerSteven Whitehouse <swhiteho@redhat.com>2010-05-10 16:07:11 +0400
commit7e619bc3e6252dc746f64ac3b486e784822e9533 (patch)
tree0e9432a16983352117366fb4ecd8de41a6dfcfc3 /fs/dlm
parent913a71d250803130eac523e7a2b6439e31a0bc83 (diff)
downloadlinux-7e619bc3e6252dc746f64ac3b486e784822e9533.tar.xz
GFS2: Fix writing to non-page aligned gfs2_quota structures
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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