xfs: allow CoW remap transactions to use reserve blocks

Since we as yet have no way of holding on to the indlen blocks that are
reserved as part of CoW fork delalloc reservations, let the CoW remap
transaction dip into the reserves so that we avoid failing writes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index 6931b0c..e49e6db 100644 (file)
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -729,7 +729,7 @@ xfs_reflink_end_cow(
                        (unsigned int)(end_fsb - offset_fsb),
                        XFS_DATA_FORK);
        error = xfs_trans_alloc(ip->i_mount, &M_RES(ip->i_mount)->tr_write,
-                       resblks, 0, 0, &tp);
+                       resblks, 0, XFS_TRANS_RESERVE, &tp);
        if (error)
                goto out;