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>
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index c09774c..2b70c8b 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1602,13 +1602,15 @@
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