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xfs: fix incorrect extent state in xfs_bmap_add_extent_unwritten_real 

[ Upstream commit 5e422f5e4f ]

There was one spot in xfs_bmap_add_extent_unwritten_real that didn't use the
passed in new extent state but always converted to normal, leading to wrong
behavior when converting from normal to unwritten.

Only found by code inspection, it seems like this code path to move partial
extent from written to unwritten while merging it with the next extent is
rarely exercised.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Christoph Hellwig 2017-10-17 14:16:19 -07:00 committed by Greg Kroah-Hartman
parent 61bc71d34a
commit 4be2d1ad59
1 changed files with 1 additions and 1 deletions
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2
fs/xfs/libxfs/xfs_bmap.c
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@ -2560,7 +2560,7 @@ xfs_bmap_add_extent_unwritten_real(
&i)))
goto done;
XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done);
cur->bc_rec.b.br_state = XFS_EXT_NORM;
cur->bc_rec.b.br_state = new->br_state;
if ((error = xfs_btree_insert(cur, &i)))
goto done;
XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);