region/host: fix reset ceph root disk after rebuild root (#13794)

Ceph storage disk rebuild root will rename origin disk to backing
disk, so we need use backing disk reset snapshot.

Signed-off-by: wanyaoqi <wanyaoqi1995@163.com>

pkg/compute/regiondrivers/kvm.go

@@ -1209,6 +1209,9 @@ func (self *SKVMRegionDriver) GetDiskResetParams(snapshot *models.SSnapshot) *js
 	params.Set("snapshot_id", jsonutils.NewString(snapshot.Id))
 	params.Set("out_of_chain", jsonutils.NewBool(snapshot.OutOfChain))
 	params.Set("location", jsonutils.NewString(snapshot.Location))
+	if len(snapshot.BackingDiskId) > 0 {
+		params.Set("backing_disk_id", jsonutils.NewString(snapshot.BackingDiskId))
+	}
 	return params
 }
 

pkg/hostman/storageman/disk_rbd.go

@@ -280,9 +280,13 @@ func (d *SRBDDisk) ResetFromSnapshot(ctx context.Context, params interface{}) (j
 	if !ok {
 		return nil, hostutils.ParamsError
 	}
+	diskId := resetParams.BackingDiskId
+	if len(diskId) == 0 {
+		diskId = d.GetId()
+	}
 	storage := d.Storage.(*SRbdStorage)
 	pool, _ := storage.StorageConf.GetString("pool")
-	return nil, storage.resetDisk(pool, d.GetId(), resetParams.SnapshotId)
+	return nil, storage.resetDisk(pool, diskId, resetParams.SnapshotId)
 }
 
 func (d *SRBDDisk) CreateFromRbdSnapshot(ctx context.Context, snapshot, srcDiskId, srcPool string) error {

pkg/hostman/storageman/diskhandlers/diskhandler.go

@@ -315,9 +315,11 @@ func diskReset(ctx context.Context, storage storageman.IStorage, diskId string,
 	if err != nil {
 		return nil, httperrors.NewMissingParameterError("snapshot_id")
 	}
+	backingDiskId, _ := body.GetString("backing_disk_id")
 	hostutils.DelayTask(ctx, disk.ResetFromSnapshot, &storageman.SDiskReset{
-		SnapshotId: snapshotId,
-		Input:      body,
+		SnapshotId:    snapshotId,
+		BackingDiskId: backingDiskId,
+		Input:         body,
 	})
 	return nil, nil
 }

pkg/hostman/storageman/storagehelper.go

@@ -36,8 +36,9 @@ func (i *SDiskCreateByDiskinfo) String() string {
 }
 
 type SDiskReset struct {
-	SnapshotId string
-	Input      jsonutils.JSONObject
+	SnapshotId    string
+	BackingDiskId string
+	Input         jsonutils.JSONObject
 }
 
 type SDiskCleanupSnapshots struct {