}
	if csi.ControllerExpandSecretRef != nil {
		allErrs = append(allErrs, validatePVSecretReference(csi.ControllerExpandSecretRef, fldPath.Child("controllerExpandSecretRef"))...)
	}
	if csi.NodePublishSecretRef != nil {
		allErrs = append(allErrs, validatePVSecretReference(csi.NodePublishSecretRef, fldPath.Child("nodePublishSecretRef"))...)
	}

	// +optional
	StorageOS *StorageOSVolumeSource
	// CSI (Container Storage Interface) represents ephemeral storage that is handled by certain external CSI drivers.
	// +optional
	CSI *CSIVolumeSource
	// Ephemeral represents a volume that is handled by a cluster storage driver.

	"nodeStageSecretRef":         "nodeStageSecretRef is a reference to the secret object containing sensitive information to pass to the CSI driver to complete the CSI NodeStageVolume and NodeStageVolume...

  // More info: https://examples.k8s.io/volumes/storageos/README.md
  // +optional
  optional StorageOSPersistentVolumeSource storageos = 21;

  // csi represents storage that is handled by an external CSI driver (Beta feature).
  // +optional
  optional CSIPersistentVolumeSource csi = 22;
}

// PersistentVolumeSpec is the specification of a persistent volume.
message PersistentVolumeSpec {

	// +optional
	StorageOS *StorageOSVolumeSource `json:"storageos,omitempty" protobuf:"bytes,27,opt,name=storageos"`
	// csi (Container Storage Interface) represents ephemeral storage that is handled by certain external CSI drivers (Beta feature).
	// +optional
	CSI *CSIVolumeSource `json:"csi,omitempty" protobuf:"bytes,28,opt,name=csi"`
	// ephemeral represents a volume that is handled by a cluster storage driver.

### Promoted CSI Ephemeral Volume to Stable

- Fixed an issue where a CSI migrated volume may be prematurely detached when the CSI driver is not running on the node.

- The in-tree cloud provider for vSphere has been deprecated and removed. Users are advised to utilize the external cloud provider and CSI driver available at https://github.com/kubernetes/cloud-provider-vsphere. ([#122937](htt...

 - Deprecated support for CSI migration of `Ceph RBD volumes`. Users who were relying on Kubernetes' ability

          },
          "csi": {
            "allOf": [
              {
                "$ref": "#/components/schemas/io.k8s.api.core.v1.CSIVolumeSource"
              }
            ],
            "description": "csi (Container Storage Interface) represents ephemeral storage that is handled by certain external CSI drivers (Beta feature)."
          },
          "downwardAPI": {