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[42/71] xfs: don't mix reflink and DAX mode for now

Message ID 147216906459.4420.5585305790072253161.stgit@birch.djwong.org (mailing list archive)
State Accepted
Headers show

Commit Message

Darrick J. Wong Aug. 25, 2016, 11:51 p.m. UTC 
Since we don't have a strategy for handling both DAX and reflink,
for now we'll just prohibit both being set at the same time.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 libxfs/xfs_inode_buf.c |    4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/libxfs/xfs_inode_buf.c b/libxfs/xfs_inode_buf.c
index 2966d54..3f2049b 100644
--- a/libxfs/xfs_inode_buf.c
+++ b/libxfs/xfs_inode_buf.c
@@ -416,6 +416,10 @@  xfs_dinode_verify(
 	if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags & XFS_DIFLAG_REALTIME))
 		return false;
 
+	/* don't let reflink and dax mix */
+	if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX))
+		return false;
+
 	return true;
 }