cephfs: implement getSnapshotInfo with go-ceph

implement getSnapshotInfo function with go-ceph
to get subvolume information.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

internal/cephfs/clone.go

@@ -138,7 +138,7 @@ func cleanupCloneFromSubvolumeSnapshot(ctx context.Context, volID, cloneID volum
 	// snapshot name is same as clone name as we need a name which can be
 	// identified during PVC-PVC cloning.
 	snapShotID := cloneID
-	snapInfo, err := getSnapshotInfo(ctx, parentVolOpt, cr, snapShotID, volID)
+	snapInfo, err := parentVolOpt.getSnapshotInfo(ctx, snapShotID, volID)
 	if err != nil {
 		if errors.Is(err, ErrSnapNotFound) {
 			return nil

internal/cephfs/controllerserver.go

@@ -600,7 +600,7 @@ func doSnapshot(ctx context.Context, volOpt *volumeOptions, subvolumeName, snaps
 			}
 		}
 	}()
-	snap, err = getSnapshotInfo(ctx, volOpt, cr, snapID, volID)
+	snap, err = volOpt.getSnapshotInfo(ctx, snapID, volID)
 	if err != nil {
 		util.ErrorLog(ctx, "failed to get snapshot info %s %v", snapID, err)
 		return snap, fmt.Errorf("failed to get snapshot info for snapshot:%s", snapID)

internal/cephfs/errors.go

@@ -24,9 +24,6 @@ import (
 const (
 	// volumeNotFound is returned when a subvolume is not found in CephFS.
 	volumeNotFound = "Error ENOENT"
-	// snapNotFound is returned when snap name passed is not found in the list
-	// of snapshots for the given image.
-	snapNotFound = "Error ENOENT"
 	// volumeNotEmpty is returned when the volume is not empty.
 	volumeNotEmpty = "Error ENOTEMPTY"
 )

internal/cephfs/fsjournal.go

@@ -342,7 +342,7 @@ func checkSnapExists(
 	snapUUID := snapData.ImageUUID
 	snapID := snapData.ImageAttributes.ImageName
 	sid.FsSnapshotName = snapData.ImageAttributes.ImageName
-	snapInfo, err := getSnapshotInfo(ctx, volOptions, cr, volumeID(snapID), volumeID(parentSubVolName))
+	snapInfo, err := volOptions.getSnapshotInfo(ctx, volumeID(snapID), volumeID(parentSubVolName))
 	if err != nil {
 		if errors.Is(err, ErrSnapNotFound) {
 			err = j.UndoReservation(ctx, volOptions.MetadataPool,

internal/cephfs/snapshot.go

@@ -19,7 +19,7 @@ package cephfs
 import (
 	"context"
 	"errors"
-	"strings"
+	"time"
 
 	"github.com/ceph/ceph-csi/internal/util"
 
@@ -81,44 +81,31 @@ func (vo *volumeOptions) deleteSnapshot(ctx context.Context, snapID, volID volum
 }
 
 type snapshotInfo struct {
-	CreatedAt        string `json:"created_at"`
+	CreatedAt        time.Time
 	CreationTime     *timestamp.Timestamp
-	DataPool         string `json:"data_pool"`
-	HasPendingClones string `json:"has_pending_clones"`
-	Protected        string `json:"protected"`
-	Size             int    `json:"size"`
+	HasPendingClones string
+	Protected        string
 }
 
-func getSnapshotInfo(ctx context.Context, volOptions *volumeOptions, cr *util.Credentials, snapID, volID volumeID) (snapshotInfo, error) {
+func (vo *volumeOptions) getSnapshotInfo(ctx context.Context, snapID, volID volumeID) (snapshotInfo, error) {
 	snap := snapshotInfo{}
-	args := []string{
-		"fs",
-		"subvolume",
-		"snapshot",
-		"info",
-		volOptions.FsName,
-		string(volID),
-		string(snapID),
-		"--group_name",
-		volOptions.SubvolumeGroup,
-		"-m", volOptions.Monitors,
-		"-c", util.CephConfigPath,
-		"-n", cephEntityClientPrefix + cr.ID,
-		"--keyfile=" + cr.KeyFile,
-		"--format=json",
-	}
-	err := execCommandJSON(
-		ctx,
-		&snap,
-		"ceph",
-		args[:]...)
+	fsa, err := vo.conn.GetFSAdmin()
 	if err != nil {
-		if strings.Contains(err.Error(), snapNotFound) {
-			return snapshotInfo{}, ErrSnapNotFound
+		util.ErrorLog(ctx, "could not get FSAdmin: %s", err)
+		return snap, err
 	}
-		util.ErrorLog(ctx, "failed to get subvolume snapshot info %s %s(%s) in fs %s", string(snapID), string(volID), err, volOptions.FsName)
-		return snapshotInfo{}, 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
 }
 

internal/cephfs/util.go

@@ -18,7 +18,6 @@ package cephfs
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 	"time"
 
@@ -38,19 +37,6 @@ func execCommandErr(ctx context.Context, program string, args ...string) error {
 	return err
 }
 
-func execCommandJSON(ctx context.Context, v interface{}, program string, args ...string) error {
-	stdout, _, err := util.ExecCommand(ctx, program, args...)
-	if err != nil {
-		return err
-	}
-
-	if err = json.Unmarshal([]byte(stdout), v); err != nil {
-		return fmt.Errorf("failed to unmarshal JSON for %s %v: %s: %w", program, util.StripSecretInArgs(args), stdout, err)
-	}
-
-	return nil
-}
-
 // Controller service request validation.
 func (cs *ControllerServer) validateCreateVolumeRequest(req *csi.CreateVolumeRequest) error {
 	if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME); err != nil {
@@ -149,17 +135,8 @@ func genSnapFromOptions(ctx context.Context, req *csi.CreateSnapshotRequest) (sn
 	return cephfsSnap, nil
 }
 
-func parseTime(ctx context.Context, createTime string) (*timestamp.Timestamp, error) {
-	tm := &timestamp.Timestamp{}
-	layout := "2006-01-02 15:04:05.000000"
-	// TODO currently parsing of timestamp to time.ANSIC generate from ceph fs is failing
-	var t time.Time
-	t, err := time.Parse(layout, createTime)
-	if err != nil {
-		util.ErrorLog(ctx, "failed to parse time %s %v", createTime, err)
-		return tm, err
-	}
-	tm, err = ptypes.TimestampProto(t)
+func parseTime(ctx context.Context, createTime time.Time) (*timestamp.Timestamp, error) {
+	tm, err := ptypes.TimestampProto(createTime)
 	if err != nil {
 		util.ErrorLog(ctx, "failed to convert time %s %v", createTime, err)
 		return tm, err

internal/cephfs/volumeoptions.go

@@ -532,7 +532,7 @@ func newSnapshotOptionsFromID(ctx context.Context, snapID string, cr *util.Crede
 	}
 	volOptions.Features = subvolInfo.Features
 
-	info, err := getSnapshotInfo(ctx, &volOptions, cr, volumeID(sid.FsSnapshotName), volumeID(sid.FsSubvolName))
+	info, err := volOptions.getSnapshotInfo(ctx, volumeID(sid.FsSnapshotName), volumeID(sid.FsSubvolName))
 	if err != nil {
 		return &volOptions, nil, &sid, err
 	}