+sub volume_snapshot_rollback {
+ my ($class, $scfg, $storeid, $volname, $snap) = @_;
+ die "volume snapshot rollback is not possible on iscsi device";
+}
+
+sub volume_snapshot_delete {
+ my ($class, $scfg, $storeid, $volname, $snap) = @_;
+ die "volume snapshot delete is not possible on iscsi device";
+}
+
+sub volume_has_feature {
+ my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
+
+ my $features = {
+ copy => { current => 1},
+ };
+
+ my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) =
+ $class->parse_volname($volname);
+
+ my $key = undef;
+ if($snapname){
+ $key = 'snap';
+ }else{
+ $key = $isBase ? 'base' : 'current';
+ }
+ return 1 if $features->{$feature}->{$key};
+
+ return undef;
+}
+