ceph-csi/internal/rbd/snapshot.go
Sven Anderson 13f291dfc6 cleanup: use errors.As() for error type checks
Replaces some remaining old-style error type checks with errors.As()

Signed-off-by: Sven Anderson <sven@redhat.com>
2020-07-09 09:58:33 +00:00

106 lines
3.3 KiB
Go

/*
Copyright 2020 The Ceph-CSI 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 rbd
import (
"context"
"errors"
"fmt"
"github.com/ceph/ceph-csi/internal/util"
"k8s.io/klog"
)
func createRBDClone(ctx context.Context, parentVol, cloneRbdVol *rbdVolume, snap *rbdSnapshot, cr *util.Credentials) error {
// create snapshot
err := parentVol.createSnapshot(ctx, snap)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to create snapshot %s: %v"), snap, err)
return err
}
// create clone image and delete snapshot
err = cloneRbdVol.cloneRbdImageFromSnapshot(ctx, snap)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to clone rbd image %s from snapshot %s: %v"), cloneRbdVol.RbdImageName, snap.RbdSnapName, err)
err = fmt.Errorf("failed to clone rbd image %s from snapshot %s: %w", cloneRbdVol.RbdImageName, snap.RbdSnapName, err)
}
errSnap := parentVol.deleteSnapshot(ctx, snap)
if errSnap != nil {
klog.Errorf(util.Log(ctx, "failed to delete snapshot: %v"), errSnap)
delErr := deleteImage(ctx, cloneRbdVol, cr)
if delErr != nil {
klog.Errorf(util.Log(ctx, "failed to delete rbd image: %s with error: %v"), cloneRbdVol, delErr)
}
return err
}
err = cloneRbdVol.getImageInfo()
if err != nil {
klog.Errorf(util.Log(ctx, "failed to get rbd image: %s details with error: %v"), cloneRbdVol, err)
delErr := deleteImage(ctx, cloneRbdVol, cr)
if delErr != nil {
klog.Errorf(util.Log(ctx, "failed to delete rbd image: %s with error: %v"), cloneRbdVol, delErr)
}
return err
}
return nil
}
func cleanUpSnapshot(ctx context.Context, parentVol *rbdVolume, rbdSnap *rbdSnapshot, rbdVol *rbdVolume, cr *util.Credentials) error {
err := parentVol.deleteSnapshot(ctx, rbdSnap)
if err != nil {
var esnf ErrSnapNotFound
if !errors.As(err, &esnf) {
klog.Errorf(util.Log(ctx, "failed to delete snapshot: %v"), err)
return err
}
}
err = deleteImage(ctx, rbdVol, cr)
if err != nil {
var einf ErrImageNotFound
if !errors.As(err, &einf) {
klog.Errorf(util.Log(ctx, "failed to delete rbd image: %s/%s with error: %v"), rbdVol.Pool, rbdVol.VolName, err)
return err
}
}
return nil
}
func generateVolFromSnap(rbdSnap *rbdSnapshot) *rbdVolume {
vol := new(rbdVolume)
vol.ClusterID = rbdSnap.ClusterID
vol.VolID = rbdSnap.SnapID
vol.Monitors = rbdSnap.Monitors
vol.Pool = rbdSnap.Pool
vol.JournalPool = rbdSnap.JournalPool
vol.RbdImageName = rbdSnap.RbdSnapName
vol.ImageID = rbdSnap.ImageID
return vol
}
func undoSnapshotCloning(ctx context.Context, parentVol *rbdVolume, rbdSnap *rbdSnapshot, cloneVol *rbdVolume, cr *util.Credentials) error {
err := cleanUpSnapshot(ctx, parentVol, rbdSnap, cloneVol, cr)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to clean up %s or %s: %v"), cloneVol, rbdSnap, err)
return err
}
err = undoSnapReservation(ctx, rbdSnap, cr)
return err
}