Add generic function to check for target version

So the test script may use a simple line like i.e.:

aux target_at_least dm-thin-pool 1 0 0 || skip
aux target_at_least snapshot-origin 1 6 || skip

diff --git a/test/lib/aux.sh b/test/lib/aux.sh
index e8a4b9df3ea93edf693c9306a1d8667021016489..cde5581eafd9a55ffc5a919e8d8b85383f912a72 100644 (file)
--- a/test/lib/aux.sh
+++ b/test/lib/aux.sh
@@ -448,6 +448,39 @@ udev_wait() {
        fi
 }
 
+#
+# Check wheter kernel [dm module] target exist
+# at least in expected version
+#
+# [dm-]target-name major minor revision
+#
+# i.e.   dm_target_at_least  dm-thin-pool  1 0
+target_at_least()
+{
+       case "$1" in
+         dm-*) modprobe "$1" ;;
+       esac
+
+       version=$(dmsetup targets 2>/dev/null | grep "${1##dm-} " 2>/dev/null)
+       version=${version##* v}
+       shift
+       major=$(echo $version | cut -d. -f1)
+       minor=$(echo $version | cut -d. -f2)
+       revision=$(echo $version | cut -d. -f3)
+
+       test -z "$1" && return 0
+       test -z "$major" && return 1
+       test "$major" -gt "$1" && return 0
+       test "$major" -lt "$1" && return 1
+       test -z "$2" && return 0
+       test -z "$minor" && return 1
+       test "$minor" -gt "$2" && return 0
+       test "$minor" -lt "$2" && return 1
+       test -z "$4" && return 0
+       test -z "$revision" && return 1
+       test "$revision" -lt "$3" && return 1
+}
+
 test -f DEVICES && devs=$(cat DEVICES)
 test -f LOOP && LOOP=$(cat LOOP)