[PATCH 1/3] dax/dm: disable testing on devices that don't support dax

[Jeff Moyer <jmoyer@redhat.com>]

Move the hack out of dmflakey and put it into _require_dm_target.  This
fixes up a lot of missed tests that are failing due to the lack of dax
support (such as tests on dm-thin, snapshot, etc).

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
---
 common/dmflakey |  5 -----
 common/rc       | 11 +++++++++++
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/common/dmflakey b/common/dmflakey
index 2af3924d..b4e11ae9 100644
--- a/common/dmflakey
+++ b/common/dmflakey
@@ -8,11 +8,6 @@ FLAKEY_ALLOW_WRITES=0
 FLAKEY_DROP_WRITES=1
 FLAKEY_ERROR_WRITES=2
 
-echo $MOUNT_OPTIONS | grep -q dax
-if [ $? -eq 0 ]; then
-	_notrun "Cannot run tests with DAX on dmflakey devices"
-fi
-
 _init_flakey()
 {
 	local BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV`
diff --git a/common/rc b/common/rc
index eeac1355..785f34c6 100644
--- a/common/rc
+++ b/common/rc
@@ -1874,6 +1874,17 @@ _require_dm_target()
 	_require_sane_bdev_flush $SCRATCH_DEV
 	_require_command "$DMSETUP_PROG" dmsetup
 
+	echo $MOUNT_OPTIONS | grep -q dax
+	if [ $? -eq 0 ]; then
+		case $target in
+		stripe|linear|error)
+			;;
+		*)
+			_notrun "Cannot run tests with DAX on $target devices."
+			;;
+		esac
+	fi
+
 	modprobe dm-$target >/dev/null 2>&1
 
 	$DMSETUP_PROG targets 2>&1 | grep -q ^$target
-- 
2.19.1