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Commit b6e03c10 authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

xfs: don't allow DAX on reflink filesystems 



Now that reflink is no longer experimental, reject attempts to mount
with DAX until that whole mess gets sorted out.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarBill O'Donnell <billodo@redhat.com>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
parent 494370cc

fs/xfs/xfs_super.c

+4 −1
Original line number Original line Diff line number Diff line
@@ -1666,9 +1666,12 @@ xfs_fs_fill_super( 
			"DAX unsupported by block device. Turning off DAX.");

			"DAX unsupported by block device. Turning off DAX.");

			mp->m_flags &= ~XFS_MOUNT_DAX;

			mp->m_flags &= ~XFS_MOUNT_DAX;

		}

		}

		if (xfs_sb_version_hasreflink(&mp->m_sb))

		if (xfs_sb_version_hasreflink(&mp->m_sb)) {

			xfs_alert(mp,

			xfs_alert(mp,

		"DAX and reflink cannot be used together!");

		"DAX and reflink cannot be used together!");

			error = -EINVAL;

			goto out_filestream_unmount;

		}

	}

	}





	if (mp->m_flags & XFS_MOUNT_DISCARD) {

	if (mp->m_flags & XFS_MOUNT_DISCARD) {