[PATCH 047/119] xfs: disable XFS_IOC_SWAPEXT when rmap btree is enabled

[Darrick J. Wong]

Swapping extents between two inodes requires the owner to be updated
in the rmap tree for all the extents that are swapped. This code
does not yet exist, so switch off the XFS_IOC_SWAPEXT ioctl until
support has been implemented. This will need to be done before the
rmap btree code can have the experimental tag removed.

Signed-off-by: Dave Chinner <dchinner at redhat.com>
[darrick.wong at oracle.com: fix extent swapping when rmap enabled]
Signed-off-by: Darrick J. Wong <darrick.wong at oracle.com>
---
 fs/xfs/xfs_bmap_util.c |    4 ++++
 1 file changed, 4 insertions(+)


diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 450fd49..8666873 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1618,6 +1618,10 @@ xfs_swap_extents(
 	__uint64_t	tmp;
 	int		lock_flags;
 
+	/* XXX: we can't do this with rmap, will fix later */
+	if (xfs_sb_version_hasrmapbt(&mp->m_sb))
+		return -EOPNOTSUPP;
+
 	tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL);
 	if (!tempifp) {
 		error = -ENOMEM;