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xfs: only cancel cow blocks when truncating the data fork 

In xfs_itruncate_extents, only cancel cow blocks and clear the reflink
flag if we were asked to truncate the data fork.  Attr fork blocks
cannot be shared, so this makes no sense.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2018-04-10 08:28:33 -07:00
parent a1f69417c6
commit 4919d42ab6
1 changed files with 8 additions and 6 deletions
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14
fs/xfs/xfs_inode.c
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@ -1602,13 +1602,15 @@ xfs_itruncate_extents(
goto out;
}
/* Remove all pending CoW reservations. */
error = xfs_reflink_cancel_cow_blocks(ip, &tp, first_unmap_block,
last_block, true);
if (error)
goto out;
if (whichfork == XFS_DATA_FORK) {
/* Remove all pending CoW reservations. */
error = xfs_reflink_cancel_cow_blocks(ip, &tp,
first_unmap_block, last_block, true);
if (error)
goto out;
xfs_itruncate_clear_reflink_flags(ip);
xfs_itruncate_clear_reflink_flags(ip);
}
/*
* Always re-log the inode so that our permanent transaction can keep