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

["Darrick J. Wong" <darrick.wong@xxxxxxxxxx>]

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@xxxxxxxxxx>
---
 libxfs/xfs_inode_buf.c |    4 ++++
 1 file changed, 4 insertions(+)


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;
 }