mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-23 05:20:19 +00:00
109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes 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 removeall
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"syscall"
|
|
|
|
"k8s.io/kubernetes/pkg/util/mount"
|
|
)
|
|
|
|
// RemoveAllOneFilesystem removes path and any children it contains.
|
|
// It removes everything it can but returns the first error
|
|
// it encounters. If the path does not exist, RemoveAll
|
|
// returns nil (no error).
|
|
// It makes sure it does not cross mount boundary, i.e. it does *not* remove
|
|
// files from another filesystems. Like 'rm -rf --one-file-system'.
|
|
// It is copied from RemoveAll() sources, with IsLikelyNotMountPoint
|
|
func RemoveAllOneFilesystem(mounter mount.Interface, path string) error {
|
|
// Simple case: if Remove works, we're done.
|
|
err := os.Remove(path)
|
|
if err == nil || os.IsNotExist(err) {
|
|
return nil
|
|
}
|
|
|
|
// Otherwise, is this a directory we need to recurse into?
|
|
dir, serr := os.Lstat(path)
|
|
if serr != nil {
|
|
if serr, ok := serr.(*os.PathError); ok && (os.IsNotExist(serr.Err) || serr.Err == syscall.ENOTDIR) {
|
|
return nil
|
|
}
|
|
return serr
|
|
}
|
|
if !dir.IsDir() {
|
|
// Not a directory; return the error from Remove.
|
|
return err
|
|
}
|
|
|
|
// Directory.
|
|
isNotMount, err := mounter.IsLikelyNotMountPoint(path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !isNotMount {
|
|
return fmt.Errorf("cannot delete directory %s: it is a mount point", path)
|
|
}
|
|
|
|
fd, err := os.Open(path)
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
// Race. It was deleted between the Lstat and Open.
|
|
// Return nil per RemoveAll's docs.
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
// Remove contents & return first error.
|
|
err = nil
|
|
for {
|
|
names, err1 := fd.Readdirnames(100)
|
|
for _, name := range names {
|
|
err1 := RemoveAllOneFilesystem(mounter, path+string(os.PathSeparator)+name)
|
|
if err == nil {
|
|
err = err1
|
|
}
|
|
}
|
|
if err1 == io.EOF {
|
|
break
|
|
}
|
|
// If Readdirnames returned an error, use it.
|
|
if err == nil {
|
|
err = err1
|
|
}
|
|
if len(names) == 0 {
|
|
break
|
|
}
|
|
}
|
|
|
|
// Close directory, because windows won't remove opened directory.
|
|
fd.Close()
|
|
|
|
// Remove directory.
|
|
err1 := os.Remove(path)
|
|
if err1 == nil || os.IsNotExist(err1) {
|
|
return nil
|
|
}
|
|
if err == nil {
|
|
err = err1
|
|
}
|
|
return err
|
|
}
|