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[Seyeong Kim <seyeong.kim@xxxxxxxxxxxxx>]

** Tags added: trusty

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https://bugs.launchpad.net/bugs/1461730

Title:
  XFS quota doesn't work after rebooting because of crash

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  SRU Justification:

  Impact: XFS quota doesn't work after rebooting becuase of crash or force reboot
          you can see msg on dmesg
          [ 12.309146] XFS (sdb): Failed to initialize disk quotas.
  Fix: Upstream development
  Testcase: mkfs.xfs for your extra storage, Set the quota 2G with it.
            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

  ---------------------

  it's affected under 3.17 kernel

  * upstream reference

  refer to
  https://github.com/torvalds/linux/commit/5ef828c4152726f56751c78ea844f08d2b2a4fa3

  * 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

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