ceph-csi/internal/cephfs/snapshot.go

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/*
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 cephfs
import (
"context"
"errors"
"time"
"github.com/ceph/ceph-csi/internal/util"
"github.com/ceph/go-ceph/cephfs/admin"
"github.com/ceph/go-ceph/rados"
"github.com/golang/protobuf/ptypes/timestamp"
)
// autoProtect points to the snapshot auto-protect feature of
// the subvolume.
const (
autoProtect = "snapshot-autoprotect"
)
// cephfsSnapshot represents a CSI snapshot and its cluster information.
type cephfsSnapshot struct {
NamePrefix string
Monitors string
// MetadataPool & Pool fields are not used atm. But its definitely good to have it in this struct
// so keeping it here
MetadataPool string
Pool string
ClusterID string
RequestName string
// ReservedID represents the ID reserved for a snapshot
ReservedID string
}
func (vo *volumeOptions) createSnapshot(ctx context.Context, snapID, volID volumeID) error {
fsa, err := vo.conn.GetFSAdmin()
if err != nil {
util.ErrorLog(ctx, "could not get FSAdmin: %s", err)
return err
}
err = fsa.CreateSubVolumeSnapshot(vo.FsName, vo.SubvolumeGroup, string(volID), string(snapID))
if err != nil {
util.ErrorLog(ctx, "failed to create subvolume snapshot %s %s in fs %s: %s",
string(snapID), string(volID), vo.FsName, err)
return err
}
return nil
}
func (vo *volumeOptions) deleteSnapshot(ctx context.Context, snapID, volID volumeID) error {
fsa, err := vo.conn.GetFSAdmin()
if err != nil {
util.ErrorLog(ctx, "could not get FSAdmin: %s", err)
return err
}
err = fsa.ForceRemoveSubVolumeSnapshot(vo.FsName, vo.SubvolumeGroup, string(volID), string(snapID))
if err != nil {
util.ErrorLog(ctx, "failed to delete subvolume snapshot %s %s in fs %s: %s",
string(snapID), string(volID), vo.FsName, err)
return err
}
return nil
}
type snapshotInfo struct {
CreatedAt time.Time
CreationTime *timestamp.Timestamp
HasPendingClones string
Protected string
}
func (vo *volumeOptions) getSnapshotInfo(ctx context.Context, snapID, volID volumeID) (snapshotInfo, error) {
snap := snapshotInfo{}
fsa, err := vo.conn.GetFSAdmin()
if err != nil {
util.ErrorLog(ctx, "could not get FSAdmin: %s", err)
return snap, err
}
info, err := fsa.SubVolumeSnapshotInfo(vo.FsName, vo.SubvolumeGroup, string(volID), string(snapID))
if err != nil {
if errors.Is(err, rados.ErrNotFound) {
return snap, ErrSnapNotFound
}
util.ErrorLog(
ctx,
"failed to get subvolume snapshot info %s %s in fs %s with error %s",
string(volID),
string(snapID),
vo.FsName,
err)
return snap, err
}
snap.CreatedAt = info.CreatedAt.Time
snap.HasPendingClones = info.HasPendingClones
snap.Protected = info.Protected
return snap, nil
}
func (vo *volumeOptions) protectSnapshot(ctx context.Context, snapID, volID volumeID) error {
// If "snapshot-autoprotect" feature is present, The ProtectSnapshot
// call should be treated as a no-op.
if checkSubvolumeHasFeature(autoProtect, vo.Features) {
return nil
}
fsa, err := vo.conn.GetFSAdmin()
if err != nil {
util.ErrorLog(ctx, "could not get FSAdmin: %s", err)
return err
}
err = fsa.ProtectSubVolumeSnapshot(vo.FsName, vo.SubvolumeGroup, string(volID),
string(snapID))
if err != nil {
if errors.Is(err, rados.ErrObjectExists) {
return nil
}
util.ErrorLog(
ctx,
"failed to protect subvolume snapshot %s %s in fs %s with error: %s",
string(volID),
string(snapID),
vo.FsName,
err)
return err
}
return nil
}
func (vo *volumeOptions) unprotectSnapshot(ctx context.Context, snapID, volID volumeID) error {
// If "snapshot-autoprotect" feature is present, The UnprotectSnapshot
// call should be treated as a no-op.
if checkSubvolumeHasFeature(autoProtect, vo.Features) {
return nil
}
fsa, err := vo.conn.GetFSAdmin()
if err != nil {
util.ErrorLog(ctx, "could not get FSAdmin: %s", err)
return err
}
err = fsa.UnprotectSubVolumeSnapshot(vo.FsName, vo.SubvolumeGroup, string(volID),
string(snapID))
if err != nil {
// In case the snap is already unprotected we get ErrSnapProtectionExist error code
// in that case we are safe and we could discard this error.
if errors.Is(err, rados.ErrObjectExists) {
return nil
}
util.ErrorLog(
ctx,
"failed to unprotect subvolume snapshot %s %s in fs %s with error: %s",
string(volID),
string(snapID),
vo.FsName,
err)
return err
}
return nil
}
func (vo *volumeOptions) cloneSnapshot(
ctx context.Context,
volID, snapID, cloneID volumeID,
cloneVolOptions *volumeOptions,
) error {
fsa, err := vo.conn.GetFSAdmin()
if err != nil {
util.ErrorLog(ctx, "could not get FSAdmin: %s", err)
return err
}
co := &admin.CloneOptions{
TargetGroup: cloneVolOptions.SubvolumeGroup,
}
if cloneVolOptions.Pool != "" {
co.PoolLayout = cloneVolOptions.Pool
}
err = fsa.CloneSubVolumeSnapshot(vo.FsName, vo.SubvolumeGroup, string(volID), string(snapID), string(cloneID), co)
if err != nil {
util.ErrorLog(
ctx,
"failed to clone subvolume snapshot %s %s in fs %s with error: %s",
string(volID),
string(snapID),
string(cloneID),
vo.FsName,
err)
if errors.Is(err, rados.ErrNotFound) {
return ErrVolumeNotFound
}
return err
}
return nil
}