cleanup: incorrect fuserecovery logging

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

internal/cephfs/fuserecovery.go

@@ -24,8 +24,6 @@ import (
 	fsutil "github.com/ceph/ceph-csi/internal/cephfs/util"
 	"github.com/ceph/ceph-csi/internal/util"
 	"github.com/ceph/ceph-csi/internal/util/log"
-
-	mountutil "k8s.io/mount-utils"
 )
 
 type (
@@ -37,9 +35,6 @@ const (
 	msNotMounted
 	msMounted
 	msCorrupted
-
-	// ceph-fuse fsType in /proc/<PID>/mountinfo.
-	cephFuseFsType = "fuse.ceph-fuse"
 )
 
 func (ms mountState) String() string {
@@ -68,30 +63,6 @@ func (ns *NodeServer) getMountState(path string) (mountState, error) {
 	return msNotMounted, nil
 }
 
-func findMountinfo(mountpoint string, minfo []mountutil.MountInfo) int {
-	for i := range minfo {
-		if minfo[i].MountPoint == mountpoint {
-			return i
-		}
-	}
-
-	return -1
-}
-
-// Ensures that given mountpoint is of specified fstype.
-// Returns true if fstype matches, or if no such mountpoint exists.
-func validateFsType(mountpoint, fsType string, minfo []mountutil.MountInfo) bool {
-	if idx := findMountinfo(mountpoint, minfo); idx > 0 {
-		mi := minfo[idx]
-
-		if mi.FsType != fsType {
-			return false
-		}
-	}
-
-	return true
-}
-
 // tryRestoreFuseMountsInNodePublish tries to restore staging and publish
 // volume moutpoints inside the NodePublishVolume call.
 //
@@ -158,19 +129,6 @@ func (ns *NodeServer) tryRestoreFuseMountsInNodePublish(
 		volOptions *store.VolumeOptions
 	)
 
-	procMountInfo, err := util.ReadMountInfoForProc("self")
-	if err != nil {
-		return err
-	}
-
-	if !validateFsType(stagingTargetPath, cephFuseFsType, procMountInfo) ||
-		!validateFsType(targetPath, cephFuseFsType, procMountInfo) {
-		// We can't restore mounts not managed by ceph-fuse.
-		log.WarningLog(ctx, "cephfs: cannot proceed with mount recovery on non-FUSE mountpoints")
-
-		return nil
-	}
-
 	volOptions, err = ns.getVolumeOptions(ctx, volID, volContext, nsMountinfo.Secrets)
 	if err != nil {
 		return err
@@ -181,13 +139,6 @@ func (ns *NodeServer) tryRestoreFuseMountsInNodePublish(
 		return err
 	}
 
-	if _, ok := volMounter.(*mounter.FuseMounter); !ok {
-		// We can't restore mounts with non-FUSE mounter.
-		log.WarningLog(ctx, "cephfs: cannot proceed with mount recovery with non-FUSE mounter")
-
-		return nil
-	}
-
 	// Try to restore mount in staging target path.
 	// Unmount and mount the volume.
 
@@ -225,7 +176,6 @@ func (ns *NodeServer) tryRestoreFuseMountsInNodePublish(
 // should be able to continue with mounting the volume normally afterwards.
 func (ns *NodeServer) tryRestoreFuseMountInNodeStage(
 	ctx context.Context,
-	mnt mounter.VolumeMounter,
 	stagingTargetPath string,
 ) error {
 	// Check if there is anything to restore.
@@ -245,28 +195,6 @@ func (ns *NodeServer) tryRestoreFuseMountInNodeStage(
 	log.WarningLog(ctx, "cephfs: mountpoint problem detected when staging a volume: %s is %s; attempting recovery",
 		stagingTargetPath, stagingTargetMs)
 
-	// Check that the existing stage mount for this volume is  managed by
-	// ceph-fuse, and that the mounter is FuseMounter. Then try to restore them.
-
-	procMountInfo, err := util.ReadMountInfoForProc("self")
-	if err != nil {
-		return err
-	}
-
-	if !validateFsType(stagingTargetPath, cephFuseFsType, procMountInfo) {
-		// We can't restore mounts not managed by ceph-fuse.
-		log.WarningLog(ctx, "cephfs: cannot proceed with mount recovery on non-FUSE mountpoints")
-
-		return nil
-	}
-
-	if _, ok := mnt.(*mounter.FuseMounter); !ok {
-		// We can't restore mounts with non-FUSE mounter.
-		log.WarningLog(ctx, "cephfs: cannot proceed with mount recovery with non-FUSE mounter")
-
-		return nil
-	}
-
 	// Restoration here means only unmounting the volume.
 	// NodeStageVolume should take care of the rest.
 	return mounter.UnmountAll(ctx, stagingTargetPath)

internal/cephfs/nodeserver.go

@@ -212,9 +212,11 @@ func (ns *NodeServer) NodeStageVolume(
 
 	// Check if the volume is already mounted
 
-	if err = ns.tryRestoreFuseMountInNodeStage(ctx, mnt, stagingTargetPath); err != nil {
+	if _, ok := mnt.(*mounter.FuseMounter); ok {
+		if err = ns.tryRestoreFuseMountInNodeStage(ctx, stagingTargetPath); err != nil {
 			return nil, status.Errorf(codes.Internal, "failed to try to restore FUSE mounts: %v", err)
 		}
+	}
 
 	isMnt, err := util.IsMountPoint(ns.Mounter, stagingTargetPath)
 	if err != nil {
@@ -446,16 +448,29 @@ func (ns *NodeServer) NodePublishVolume(
 	targetPath := req.GetTargetPath()
 	volID := fsutil.VolumeID(req.GetVolumeId())
 
+	volOptions := &store.VolumeOptions{}
+	defer volOptions.Destroy()
+
+	if err := volOptions.DetectMounter(req.GetVolumeContext()); err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to detect mounter for volume %s: %v", volID, err.Error())
+	}
+
+	volMounter, err := mounter.New(volOptions)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to create mounter for volume %s: %v", volID, err.Error())
+	}
+
 	// Considering kubelet make sure the stage and publish operations
 	// are serialized, we dont need any extra locking in nodePublish
 
-	if err := util.CreateMountPoint(targetPath); err != nil {
+	if err = util.CreateMountPoint(targetPath); err != nil {
 		log.ErrorLog(ctx, "failed to create mount point at %s: %v", targetPath, err)
 
 		return nil, status.Error(codes.Internal, err.Error())
 	}
 
-	if err := ns.tryRestoreFuseMountsInNodePublish(
+	if _, ok := volMounter.(*mounter.FuseMounter); ok {
+		if err = ns.tryRestoreFuseMountsInNodePublish(
 			ctx,
 			volID,
 			stagingTargetPath,
@@ -464,6 +479,7 @@ func (ns *NodeServer) NodePublishVolume(
 		); err != nil {
 			return nil, status.Errorf(codes.Internal, "failed to try to restore FUSE mounts: %v", err)
 		}
+	}
 
 	if req.GetReadonly() {
 		mountOptions = append(mountOptions, "ro")

internal/cephfs/store/volumeoptions.go

@@ -151,6 +151,10 @@ func validateMounter(m string) error {
 	return nil
 }
 
+func (v *VolumeOptions) DetectMounter(options map[string]string) error {
+	return extractMounter(&v.Mounter, options)
+}
+
 func extractMounter(dest *string, options map[string]string) error {
 	if err := extractOptionalOption(dest, "mounter", options); err != nil {
 		return err

internal/util/util.go

@@ -340,12 +340,6 @@ func IsCorruptedMountError(err error) bool {
 	return mount.IsCorruptedMnt(err)
 }
 
-// ReadMountInfoForProc reads /proc/<PID>/mountpoint and marshals it into
-// MountInfo structs.
-func ReadMountInfoForProc(proc string) ([]mount.MountInfo, error) {
-	return mount.ParseMountInfo(fmt.Sprintf("/proc/%s/mountinfo", proc))
-}
-
 // Mount mounts the source to target path.
 func Mount(mounter mount.Interface, source, target, fstype string, options []string) error {
 	return mounter.MountSensitiveWithoutSystemd(source, target, fstype, options, nil)