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(parent: 0f705f6) | patch
xfs: handle racy AIO in xfs_reflink_end_cow
authorChristoph Hellwig <hch@lst.de>
Tue, 3 Oct 2017 15:58:33 +0000 (08:58 -0700)
committerDarrick J. Wong <darrick.wong@oracle.com>
Wed, 4 Oct 2017 04:27:55 +0000 (21:27 -0700)
commit4f93412c654ae12e94884bda8d6289c2c0115c9f
treea4d96867b24d45f6e627b72f9d804ed2cb3e92b1tree | snapshot
parent0f705f645388aebb36e5527bb0e0106cbe4ffe25commit | diff
 xfs: handle racy AIO in xfs_reflink_end_cow

If we got two AIO writes into a COW area the second one might not have any
COW extents left to convert.  Handle that case gracefully instead of
triggering an assert or accessing beyond the bounds of the extent list.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
fs/xfs/xfs_reflink.c diff | blob | history
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