chore(refactor): move btrfs code out of zfs package

Signed-off-by: Pawan <pawan@mayadata.io>

pkg/zfs/btrfs_util.go

@@ -1,43 +0,0 @@
-/*
-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 zfs
-
-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.
- */
-func btrfsGenerateUUID(volume string) error {
-	device := ZFSDevPath + volume
-
-	// 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 %s error: %s", volume, string(out))
-		return err
-	}
-	klog.Infof("btrfs: generated UUID for the cloned volume %s \n %v", volume, string(out))
-	return nil
-}