mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-30 00:40:21 +00:00
6aac399075
if any on going opearation is seen,we have to return Abort error message Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
61 lines
1.8 KiB
Go
61 lines
1.8 KiB
Go
/*
|
|
Copyright 2019 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 util
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
|
)
|
|
|
|
const (
|
|
// VolumeOperationAlreadyExistsFmt string format to return for concerrent operation
|
|
VolumeOperationAlreadyExistsFmt = "an operation with the given Volume ID %s already exists"
|
|
|
|
// SnapshotOperationAlreadyExistsFmt string format to return for concerrent operation
|
|
SnapshotOperationAlreadyExistsFmt = "an operation with the given Snapshot ID %s already exists"
|
|
)
|
|
|
|
// VolumeLocks implements a map with atomic operations. It stores a set of all volume IDs
|
|
// with an ongoing operation.
|
|
type VolumeLocks struct {
|
|
locks sets.String
|
|
mux sync.Mutex
|
|
}
|
|
|
|
// NewVolumeLocks returns new VolumeLocks
|
|
func NewVolumeLocks() *VolumeLocks {
|
|
return &VolumeLocks{
|
|
locks: sets.NewString(),
|
|
}
|
|
}
|
|
|
|
// TryAcquire tries to acquire the lock for operating on volumeID and returns true if successful.
|
|
// If another operation is already using volumeID, returns false.
|
|
func (vl *VolumeLocks) TryAcquire(volumeID string) bool {
|
|
vl.mux.Lock()
|
|
defer vl.mux.Unlock()
|
|
if vl.locks.Has(volumeID) {
|
|
return false
|
|
}
|
|
vl.locks.Insert(volumeID)
|
|
return true
|
|
}
|
|
|
|
func (vl *VolumeLocks) Release(volumeID string) {
|
|
vl.mux.Lock()
|
|
defer vl.mux.Unlock()
|
|
vl.locks.Delete(volumeID)
|
|
}
|