cephfs: remove snapshot protect/unprotect

This commit eliminates the code for protecting and unprotecting
snapshots, as the functionality to protect and unprotect snapshots
is being deprecated.

Signed-off-by: Praveen M <m.praveen@ibm.com>

internal/cephfs/controllerserver.go

@@ -750,7 +750,7 @@ func (cs *ControllerServer) ControllerExpandVolume(
 // CreateSnapshot creates the snapshot in backend and stores metadata
 // in store
 //
-//nolint:gocognit,gocyclo,cyclop // golangci-lint did not catch this earlier, needs to get fixed late
+//nolint:gocyclo,cyclop // golangci-lint did not catch this earlier, needs to get fixed late
 func (cs *ControllerServer) CreateSnapshot(
 	ctx context.Context,
 	req *csi.CreateSnapshotRequest,
@@ -830,29 +830,15 @@ func (cs *ControllerServer) CreateSnapshot(
 	}
 	defer cs.VolumeLocks.Release(sourceVolID)
 	snapName := req.GetName()
-	sid, snapInfo, err := store.CheckSnapExists(ctx, parentVolOptions, cephfsSnap, cs.ClusterName, cs.SetMetadata, cr)
+	sid, _, err := store.CheckSnapExists(ctx, parentVolOptions, cephfsSnap, cs.ClusterName, cs.SetMetadata, cr)
 	if err != nil {
 		return nil, status.Error(codes.Internal, err.Error())
 	}
 
-	// check are we able to retrieve the size of parent
-	// ceph fs subvolume info command got added in 14.2.10 and 15.+
-	// as we are not able to retrieve the parent size we are rejecting the
-	// request to create snapshot.
-	// TODO: For this purpose we could make use of cached clusterAdditionalInfo
-	// too.
 	volClient := core.NewSubVolume(parentVolOptions.GetConnection(), &parentVolOptions.SubVolume,
 		parentVolOptions.ClusterID, cs.ClusterName, cs.SetMetadata)
 	info, err := volClient.GetSubVolumeInfo(ctx)
 	if err != nil {
-		// Check error code value against ErrInvalidCommand to understand the cluster
-		// support it or not, It's safe to evaluate as the filtering
-		// is already done from GetSubVolumeInfo() and send out the error here.
-		if errors.Is(err, cerrors.ErrInvalidCommand) {
-			return nil, status.Error(
-				codes.FailedPrecondition,
-				"subvolume info command not supported in current ceph cluster")
-		}
 		if sid != nil {
 			errDefer := store.UndoSnapReservation(ctx, parentVolOptions, *sid, snapName, cr)
 			if errDefer != nil {
@@ -866,22 +852,11 @@ func (cs *ControllerServer) CreateSnapshot(
 
 	metadata := k8s.GetSnapshotMetadata(req.GetParameters())
 	if sid != nil {
-		// check snapshot is protected
-		protected := true
-		snapClient := core.NewSnapshot(parentVolOptions.GetConnection(), sid.FsSnapshotName,
-			parentVolOptions.ClusterID, cs.ClusterName, cs.SetMetadata, &parentVolOptions.SubVolume)
-		if !(snapInfo.Protected == core.SnapshotIsProtected) {
-			err = snapClient.ProtectSnapshot(ctx)
-			if err != nil {
-				protected = false
-				log.WarningLog(ctx, "failed to protect snapshot of snapshot: %s (%s)",
-					sid.FsSnapshotName, err)
-			}
-		}
-
 		// Update snapshot-name/snapshot-namespace/snapshotcontent-name details on
 		// subvolume snapshot as metadata in case snapshot already exist
 		if len(metadata) != 0 {
+			snapClient := core.NewSnapshot(parentVolOptions.GetConnection(), sid.FsSnapshotName,
+				parentVolOptions.ClusterID, cs.ClusterName, cs.SetMetadata, &parentVolOptions.SubVolume)
 			err = snapClient.SetAllSnapshotMetadata(metadata)
 			if err != nil {
 				return nil, status.Error(codes.Internal, err.Error())
@@ -894,7 +869,7 @@ func (cs *ControllerServer) CreateSnapshot(
 				SnapshotId:     sid.SnapshotID,
 				SourceVolumeId: req.GetSourceVolumeId(),
 				CreationTime:   sid.CreationTime,
-				ReadyToUse:     protected,
+				ReadyToUse:     true,
 			},
 		}, nil
 	}
@@ -968,10 +943,6 @@ func (cs *ControllerServer) doSnapshot(
 		return snap, fmt.Errorf("failed to get snapshot info for snapshot:%s", snapID)
 	}
 	snap.CreationTime = timestamppb.New(snap.CreatedAt)
-	err = snapClient.ProtectSnapshot(ctx)
-	if err != nil {
-		log.ErrorLog(ctx, "failed to protect snapshot %s %v", snapID, err)
-	}
 
 	// Set snapshot-name/snapshot-namespace/snapshotcontent-name details
 	// on subvolume snapshot as metadata on create
@@ -1006,8 +977,6 @@ func (cs *ControllerServer) validateSnapshotReq(ctx context.Context, req *csi.Cr
 
 // DeleteSnapshot deletes the snapshot in backend and removes the
 // snapshot metadata from store.
-//
-//nolint:gocyclo,cyclop // TODO: reduce complexity
 func (cs *ControllerServer) DeleteSnapshot(
 	ctx context.Context,
 	req *csi.DeleteSnapshotRequest,
@@ -1100,14 +1069,6 @@ func (cs *ControllerServer) DeleteSnapshot(
 	if snapInfo.HasPendingClones == "yes" {
 		return nil, status.Errorf(codes.FailedPrecondition, "snapshot %s has pending clones", snapshotID)
 	}
-	snapClient := core.NewSnapshot(volOpt.GetConnection(), sid.FsSnapshotName,
-		volOpt.ClusterID, cs.ClusterName, cs.SetMetadata, &volOpt.SubVolume)
-	if snapInfo.Protected == core.SnapshotIsProtected {
-		err = snapClient.UnprotectSnapshot(ctx)
-		if err != nil {
-			return nil, status.Error(codes.Internal, err.Error())
-		}
-	}
 
 	needsDelete, err := store.UnrefSelfInSnapshotBackedVolumes(ctx, volOpt, sid.SnapshotID)
 	if err != nil {
@@ -1119,6 +1080,8 @@ func (cs *ControllerServer) DeleteSnapshot(
 	}
 
 	if needsDelete {
+		snapClient := core.NewSnapshot(volOpt.GetConnection(), sid.FsSnapshotName,
+			volOpt.ClusterID, cs.ClusterName, cs.SetMetadata, &volOpt.SubVolume)
 		err = deleteSnapshotAndUndoReservation(
 			ctx,
 			snapClient,

internal/cephfs/core/clone.go

@@ -18,7 +18,6 @@ package core
 
 import (
 	"context"
-	"errors"
 	"fmt"
 
 	cerrors "github.com/ceph/ceph-csi/internal/cephfs/errors"
@@ -34,11 +33,6 @@ type cephFSCloneState struct {
 	errorMsg string
 }
 
-const (
-	// SnapshotIsProtected string indicates that the snapshot is currently protected.
-	SnapshotIsProtected = "yes"
-)
-
 // CephFSCloneError indicates that fetching the clone state returned an error.
 var CephFSCloneError = cephFSCloneState{}
 
@@ -73,43 +67,20 @@ func (s *subVolumeClient) CreateCloneFromSubvolume(
 
 		return err
 	}
-	var (
-		// if protectErr is not nil we will delete the snapshot as the protect fails
-		protectErr error
-		// if cloneErr is not nil we will unprotect the snapshot and delete the snapshot
-		cloneErr error
-	)
-	defer func() {
-		if protectErr != nil {
-			err = snapClient.DeleteSnapshot(ctx)
-			if err != nil {
-				log.ErrorLog(ctx, "failed to delete snapshot %s %v", snapshotID, err)
-			}
-		}
 
+	// if cloneErr is not nil we will delete the snapshot
+	var cloneErr error
+
+	defer func() {
 		if cloneErr != nil {
 			if err = s.PurgeVolume(ctx, true); err != nil {
 				log.ErrorLog(ctx, "failed to delete volume %s: %v", s.VolID, err)
 			}
-			if err = snapClient.UnprotectSnapshot(ctx); 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 and we are good to go
-				// ahead with deletion
-				if !errors.Is(err, cerrors.ErrSnapProtectionExist) {
-					log.ErrorLog(ctx, "failed to unprotect snapshot %s %v", snapshotID, err)
-				}
-			}
 			if err = snapClient.DeleteSnapshot(ctx); err != nil {
 				log.ErrorLog(ctx, "failed to delete snapshot %s %v", snapshotID, err)
 			}
 		}
 	}()
-	protectErr = snapClient.ProtectSnapshot(ctx)
-	if protectErr != nil {
-		log.ErrorLog(ctx, "failed to protect snapshot %s %v", snapshotID, protectErr)
-
-		return protectErr
-	}
 	cloneErr = snapClient.CloneSnapshot(ctx, s.SubVolume)
 	if cloneErr != nil {
 		log.ErrorLog(ctx, "failed to clone snapshot %s %s to %s %v", parentvolOpt.VolID, snapshotID, s.VolID, cloneErr)
@@ -139,16 +110,6 @@ func (s *subVolumeClient) CreateCloneFromSubvolume(
 	}
 
 	// As we completed clone, remove the intermediate snap
-	if err = snapClient.UnprotectSnapshot(ctx); 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 and we are good to go
-		// ahead with deletion
-		if !errors.Is(err, cerrors.ErrSnapProtectionExist) {
-			log.ErrorLog(ctx, "failed to unprotect snapshot %s %v", snapshotID, err)
-
-			return err
-		}
-	}
 	if err = snapClient.DeleteSnapshot(ctx); err != nil {
 		log.ErrorLog(ctx, "failed to delete snapshot %s %v", snapshotID, err)
 
@@ -166,24 +127,8 @@ func (s *subVolumeClient) CleanupSnapshotFromSubvolume(
 	// identified during PVC-PVC cloning.
 	snapShotID := s.VolID
 	snapClient := NewSnapshot(s.conn, snapShotID, s.clusterID, s.clusterName, s.enableMetadata, parentVol)
-	snapInfo, err := snapClient.GetSnapshotInfo(ctx)
-	if err != nil {
-		if errors.Is(err, cerrors.ErrSnapNotFound) {
-			return nil
-		}
 
-		return err
-	}
-
-	if snapInfo.Protected == SnapshotIsProtected {
-		err = snapClient.UnprotectSnapshot(ctx)
-		if err != nil {
-			log.ErrorLog(ctx, "failed to unprotect snapshot %s %v", snapShotID, err)
-
-			return err
-		}
-	}
-	err = snapClient.DeleteSnapshot(ctx)
+	err := snapClient.DeleteSnapshot(ctx)
 	if err != nil {
 		log.ErrorLog(ctx, "failed to delete snapshot %s %v", snapShotID, err)
 

internal/cephfs/core/snapshot.go

@@ -30,12 +30,6 @@ import (
 	"github.com/golang/protobuf/ptypes/timestamp"
 )
 
-// autoProtect points to the snapshot auto-protect feature of
-// the subvolume.
-const (
-	autoProtect = "snapshot-autoprotect"
-)
-
 // SnapshotClient is the interface that holds the signature of snapshot methods
 // that interacts with CephFS snapshot API's.
 type SnapshotClient interface {
@@ -45,10 +39,6 @@ type SnapshotClient interface {
 	DeleteSnapshot(ctx context.Context) error
 	// GetSnapshotInfo returns the snapshot info of the subvolume.
 	GetSnapshotInfo(ctx context.Context) (SnapshotInfo, error)
-	// ProtectSnapshot protects the snapshot of the subvolume.
-	ProtectSnapshot(ctx context.Context) error
-	// UnprotectSnapshot unprotects the snapshot of the subvolume.
-	UnprotectSnapshot(ctx context.Context) error
 	// CloneSnapshot clones the snapshot of the subvolume.
 	CloneSnapshot(ctx context.Context, cloneVolOptions *SubVolume) error
 	// SetAllSnapshotMetadata set all the metadata from arg parameters on
@@ -139,7 +129,6 @@ type SnapshotInfo struct {
 	CreatedAt        time.Time
 	CreationTime     *timestamp.Timestamp
 	HasPendingClones string
-	Protected        string
 }
 
 // GetSnapshotInfo returns the snapshot info of the subvolume.
@@ -169,80 +158,10 @@ func (s *snapshotClient) GetSnapshotInfo(ctx context.Context) (SnapshotInfo, err
 	}
 	snap.CreatedAt = info.CreatedAt.Time
 	snap.HasPendingClones = info.HasPendingClones
-	snap.Protected = info.Protected
 
 	return snap, nil
 }
 
-// ProtectSnapshot protects the snapshot of the subvolume.
-func (s *snapshotClient) ProtectSnapshot(ctx context.Context) error {
-	// If "snapshot-autoprotect" feature is present, The ProtectSnapshot
-	// call should be treated as a no-op.
-	if checkSubvolumeHasFeature(autoProtect, s.Features) {
-		return nil
-	}
-	fsa, err := s.conn.GetFSAdmin()
-	if err != nil {
-		log.ErrorLog(ctx, "could not get FSAdmin: %s", err)
-
-		return err
-	}
-
-	err = fsa.ProtectSubVolumeSnapshot(s.FsName, s.SubvolumeGroup, s.VolID, s.SnapshotID)
-	if err != nil {
-		if errors.Is(err, rados.ErrObjectExists) {
-			return nil
-		}
-		log.ErrorLog(
-			ctx,
-			"failed to protect subvolume snapshot %s %s in fs %s with error: %s",
-			s.VolID,
-			s.SnapshotID,
-			s.FsName,
-			err)
-
-		return err
-	}
-
-	return nil
-}
-
-// UnprotectSnapshot unprotects the snapshot of the subvolume.
-func (s *snapshotClient) UnprotectSnapshot(ctx context.Context) error {
-	// If "snapshot-autoprotect" feature is present, The UnprotectSnapshot
-	// call should be treated as a no-op.
-	if checkSubvolumeHasFeature(autoProtect, s.Features) {
-		return nil
-	}
-	fsa, err := s.conn.GetFSAdmin()
-	if err != nil {
-		log.ErrorLog(ctx, "could not get FSAdmin: %s", err)
-
-		return err
-	}
-
-	err = fsa.UnprotectSubVolumeSnapshot(s.FsName, s.SubvolumeGroup, s.VolID,
-		s.SnapshotID)
-	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
-		}
-		log.ErrorLog(
-			ctx,
-			"failed to unprotect subvolume snapshot %s %s in fs %s with error: %s",
-			s.VolID,
-			s.SnapshotID,
-			s.FsName,
-			err)
-
-		return err
-	}
-
-	return nil
-}
-
 // CloneSnapshot clones the snapshot of the subvolume.
 func (s *snapshotClient) CloneSnapshot(
 	ctx context.Context,

internal/cephfs/errors/errors.go

@@ -46,9 +46,6 @@ var (
 	// statically provisioned.
 	ErrNonStaticVolume = coreError.New("volume not static")
 
-	// ErrSnapProtectionExist is returned when the snapshot is already protected.
-	ErrSnapProtectionExist = coreError.New("snapshot  protection already exists")
-
 	// ErrSnapNotFound is returned when snap name passed is not found in the list
 	// of snapshots for the given image.
 	ErrSnapNotFound = coreError.New("snapshot not found")