xfs/realtime: add _require_no_rtinherit function

To better exercise the data path code of realtime subvolumes, we
will set rtinherit=1 during mkfs calls.  For tests which this is not
desired we introduce a _require_no_rtinherit function to opt out of
this behavior.

Signed-off-by: Richard Wareing <rwareing@fb.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

common/rc

@@ -33,6 +33,16 @@ BC=$(which bc 2> /dev/null) || BC=
 VALID_TEST_ID="[0-9]\{3\}"
 VALID_TEST_NAME="$VALID_TEST_ID-\?[[:alnum:]-]*"
 
+# Some tests are not relevant or functional when testing XFS realtime
+# subvolumes along with the rtinherit=1 mkfs option.  In these cases,
+# this test will opt-out of the test.
+_require_no_rtinherit()
+{
+	[ "$FSTYP" = "xfs" ] && echo "$MKFS_OPTIONS" |
+		egrep -q "rtinherit([^=]|=1|$)" && \
+		_notrun "rtinherit mkfs option is not supported by this test."
+}
+
 _require_math()
 {
 	if [ -z "$BC" ]; then

tests/generic/250

@@ -48,6 +48,9 @@ _require_scratch
 _require_dm_target error
 _require_xfs_io_command "falloc"
 _require_odirect
+# This test uses "dm" without taking into account the data could be on
+# realtime subvolume, thus the test will fail with rtinherit=1
+_require_no_rtinherit
 
 rm -f $seqres.full
 

tests/generic/252

@@ -47,6 +47,9 @@ _supported_os Linux
 _require_scratch
 _require_dm_target error
 _require_xfs_io_command "falloc"
+# This test uses "dm" without taking into account the data could be on
+# realtime subvolume, thus the test will fail with rtinherit=1
+_require_no_rtinherit
 _require_aiodio "aiocp"
 AIO_TEST="src/aio-dio-regress/aiocp"
 

tests/generic/441

@@ -47,6 +47,9 @@ _cleanup()
 # real QA test starts here
 _supported_os Linux
 _require_scratch
+# This test uses "dm" without taking into account the data could be on
+# realtime subvolume, thus the test will fail with rtinherit=1
+_require_no_rtinherit
 
 # Generally, we want to avoid journal errors on the extended testcase. Only
 # unset the -s flag if we have a logdev

tests/xfs/170

@@ -50,6 +50,7 @@ _supported_fs xfs
 _supported_os Linux
 
 _require_scratch
+_require_no_rtinherit
 
 _check_filestreams_support || _notrun "filestreams not available"