refact(csi): use common lib-csi imports (#263)

Signed-off-by: shubham <shubham.bajpai@mayadata.io>

vendor/github.com/openebs/lib-csi/pkg/btrfs/btrfs_util.go

@@ -0,0 +1,43 @@
+/*
+Copyright 2020 The OpenEBS Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package btrfs
+
+import (
+	"os/exec"
+
+	"k8s.io/klog"
+)
+
+/*
+* We have to generate a new UUID for the cloned volumes with btrfs filesystem
+* otherwise system will mount the same volume if UUID is same. Here, since cloned
+* volume refers to the same block because of the way ZFS clone works, it will
+* also have the same UUID.
+ */
+
+// GenerateUUID generates a new btrfs UUID for the given device
+func GenerateUUID(device string) error {
+	// for mounting the cloned volume for btrfs, a new UUID has to be generated
+	cmd := exec.Command("btrfstune", "-f", "-u", device)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		klog.Errorf("btrfs: uuid generate failed for device %s error: %s", device, string(out))
+		return err
+	}
+	klog.Infof("btrfs: generated UUID for the device %s \n %v", device, string(out))
+	return nil
+}