[PATCH 4/6] xfstests: add _require_xfs_mkfs_validation to common/rc

[Jan Tulak <jtulak@redhat.com>]

Add a simple way to skip a test if it is (or is not) run on mkfs correctly
validating inputs.

Signed-off-by: Jan Tulak <jtulak@redhat.com>
---
 common/rc | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/common/rc b/common/rc
index 0c68e4f..72f9901 100644
--- a/common/rc
+++ b/common/rc
@@ -3843,6 +3843,35 @@ _get_fs_sysfs_attr()
 	cat /sys/fs/${FSTYP}/${dname}/${attr}
 }
 
+# Skip if we are running an older binary without the stricter input checks.
+# Make multiple checks to be sure that there is no regression on the one
+# selected feature check, which would skew the result.
+_require_xfs_mkfs_validation()
+{
+	_require_scratch
+	$MKFS_XFS_PROG -f -N -s size=2s $SCRATCH_DEV >/dev/null 2>&1
+	sum=$?
+	$MKFS_XFS_PROG -f -N -l version=2,su=$((256 * 1024 + 4096)) $SCRATCH_DEV >/dev/null 2>&1
+	sum=`expr $sum + $?`
+
+	if [ "$sum" -eq 0 ]; then
+		_notrun "Requires newer mkfs with stricter input checks."
+	fi
+}
+
+# The oposite of _require_xfs_mkfs_validation.
+_require_xfs_mkfs_without_validation()
+{
+	_require_scratch
+	$MKFS_XFS_PROG -f -N -s size=2s $SCRATCH_DEV >/dev/null 2>&1
+	sum=$?
+	$MKFS_XFS_PROG -f -N -l version=2,su=$((256 * 1024 + 4096)) $SCRATCH_DEV >/dev/null 2>&1
+	sum=`expr $sum + $?`
+
+	if [ "$sum" -eq 2 ]; then
+		_notrun "Requires older mkfs without stricter input checks."
+	fi
+}
 init_rc
 
 ################################################################################
-- 
2.5.5