Some features of dm-target are not available on the old linux kernel,
and we can use the version of dm-target to check the availability.
Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
---
common/rc | 39 ++++++++++++++++++++++++++++++++++-----
1 file changed, 34 insertions(+), 5 deletions(-)
diff --git a/common/rc b/common/rc
index e2a8229..9ea84ba 100644
--- a/common/rc
+++ b/common/rc
@@ -1779,10 +1779,12 @@ _require_sane_bdev_flush()
fi
}
-# this test requires a specific device mapper target
+# this test requires a specific device mapper target and
+# an optional version number (e.g., 1.4.0)
_require_dm_target()
{
- _target=$1
+ local target=$1
+ local version=$2
# require SCRATCH_DEV to be a valid block device with sane BLKFLSBUF
# behaviour
@@ -1790,11 +1792,38 @@ _require_dm_target()
_require_sane_bdev_flush $SCRATCH_DEV
_require_command "$DMSETUP_PROG" dmsetup
- modprobe dm-$_target >/dev/null 2>&1
+ modprobe dm-$target >/dev/null 2>&1
- $DMSETUP_PROG targets 2>&1 | grep -q ^$_target
+ $DMSETUP_PROG targets 2>&1 | grep -q ^$target
if [ $? -ne 0 ]; then
- _notrun "This test requires dm $_target support"
+ _notrun "This test requires dm $target support"
+ fi
+
+ if [ -n "$version" ]; then
+ local got
+
+ got=$($DMSETUP_PROG targets 2>&1 | \
+ awk -v tgt=$target '$0 ~ tgt {sub("v", "", $2); print $2}')
+ if [ -z "$got" ]; then
+ _notrun "This test requires dm $target $version at least (got unknown)"
+ fi
+
+ awk -v min=$version -v got=$got '
+ BEGIN \
+ {
+ cmin = split(min, amin, ".");
+ cgot = split(got, agot, ".");
+ for (i = 1; i <= cgot && i <= cmin; i++) {
+ if (agot[i] != amin[i]) {
+ exit(agot[i] < amin[i]);
+ }
+ }
+ exit(cgot < cmin);
+ }
+ '
+ if [ $? -ne 0 ]; then
+ _notrun "This test requires dm $target $version at least (got $got)"
+ fi
fi
}
--
2.9.5
--
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