Merge CSI plugin code.

Signed-off-by: Xun Jiang <[email protected]>

changelogs/unreleased/7609-blackpiglet

@@ -0,0 +1 @@
+Merge CSI plugin code into Velero.

pkg/apis/velero/v1/labels_annotations.go

@@ -97,6 +97,10 @@ const (
 	// VolumesToExcludeAnnotation is the annotation on a pod whose mounted volumes
 	// should be excluded from pod volume backup.
 	VolumesToExcludeAnnotation = "backup.velero.io/backup-volumes-excludes"
+
+	// ExcludeFromBackupLabel is the label to exclude k8s resource from backup,
+	// even if the resource contains a matching selector label.
+	ExcludeFromBackupLabel = "velero.io/exclude-from-backup"
 )
 
 type AsyncOperationIDPrefix string
@@ -111,3 +115,44 @@ type VeleroResourceUsage string
 const (
 	VeleroResourceUsageDataUploadResult VeleroResourceUsage = "DataUpload"
 )
+
+// CSI related plugin actions' constant variable
+const (
+	VolumeSnapshotLabel                             = "velero.io/volume-snapshot-name"
+	VolumeSnapshotHandleAnnotation                  = "velero.io/csi-volumesnapshot-handle"
+	VolumeSnapshotRestoreSize                       = "velero.io/vsi-volumesnapshot-restore-size"
+	CSIDriverNameAnnotation                         = "velero.io/csi-driver-name"
+	CSIDeleteSnapshotSecretName                     = "velero.io/csi-deletesnapshotsecret-name"
+	CSIDeleteSnapshotSecretNamespace                = "velero.io/csi-deletesnapshotsecret-namespace"
+	CSIVSCDeletionPolicy                            = "velero.io/csi-vsc-deletion-policy"
+	VolumeSnapshotClassSelectorLabel                = "velero.io/csi-volumesnapshot-class"
+	VolumeSnapshotClassDriverBackupAnnotationPrefix = "velero.io/csi-volumesnapshot-class"
+	VolumeSnapshotClassDriverPVCAnnotation          = "velero.io/csi-volumesnapshot-class"
+
+	// There is no release w/ these constants exported. Using the strings for now.
+	// CSI Labels volumesnapshotclass
+	// https://github.com/kubernetes-csi/external-snapshotter/blob/master/pkg/utils/util.go#L59-L60
+	PrefixedSnapshotterListSecretNameKey      = "csi.storage.k8s.io/snapshotter-list-secret-name"
+	PrefixedSnapshotterListSecretNamespaceKey = "csi.storage.k8s.io/snapshotter-list-secret-namespace"
+
+	// CSI Labels volumesnapshotcontents
+	PrefixedSnapshotterSecretNameKey      = "csi.storage.k8s.io/snapshotter-secret-name"
+	PrefixedSnapshotterSecretNamespaceKey = "csi.storage.k8s.io/snapshotter-secret-namespace"
+
+	// Velero checks this annotation to determine whether to skip resource excluding check.
+	MustIncludeAdditionalItemAnnotation = "backup.velero.io/must-include-additional-items"
+	// SkippedNoCSIPVAnnotation - Velero checks this annotation on processed PVC to
+	// find out if the snapshot was skipped b/c the PV is not provisioned via CSI
+	SkippedNoCSIPVAnnotation = "backup.velero.io/skipped-no-csi-pv"
+
+	// DynamicPVRestoreLabel is the label key for dynamic PV restore
+	DynamicPVRestoreLabel = "velero.io/dynamic-pv-restore"
+
+	// DataUploadNameAnnotation is the label key for the DataUpload name
+	DataUploadNameAnnotation = "velero.io/data-upload-name"
+)
+
+/*
+	csiBIAPluginName                    = "velero.io/csi-pvc-backupper"
+	vsphereBIAPluginName                = "velero.io/vsphere-pvc-backupper"
+*/