[Trusty][SRU][PATCH] LP#1461730 -- xfs: avoid false quotacheck after unclean shutdown

[Seyeong Kim]

BugLink: http://bugs.launchpad.net/bugs/1461730

[Impact]

XFS quota doesn't work after rebooting because of crash or force reboot.
You can see msg on dmesg.
[ 12.309146] XFS (sdb): Failed to initialize disk quotas.

[Fix]

Upstream development
5ef828c41527 ("xfs: avoid false quotacheck after unclean shutdown")

It's affected under 3.17 kernel.

* fixed directory mismatch

There was no libxfs directory on fs/xfs/, I modified upstream 
fs/xfs/libxfs/xfs_sb.c to proper position /fs/xfs/xfs_sb.c on ubuntu.

[Testcase]

mkfs.xfs for your extra storage, set the quota 2G with it. Using the
command "dd if=/dev/zero of=test bs=1M count=3000", You can see that they 
have quota 2G at first. But after force rebooting, you can see that they 
don't limit quota. You can make 3G on 2G quota set directory.

Eric Sandeen (1):
  xfs: avoid false quotacheck after unclean shutdown

 fs/xfs/xfs_mount.c |  1 -
 fs/xfs/xfs_sb.c    | 26 ++++++++++++++++++++++----
 2 files changed, 22 insertions(+), 5 deletions(-)

-- 
2.1.4