* Fixed validation of multizone cluster for GCE ([#38695](https://github.com/kubernetes/kubernetes/pull/38695), [@jszczepkowski](https://github.com/jszczepkowski))
* Fix GCI mounter issue ([#38124](https://github.com/kubernetes/kubernetes/pull/38124), [@jingxu97](https://github.com/jingxu97))

- The mount-utils mounter now provides an option to limit the number of concurrent format operations. ([#115379](https://github.com/kubernetes/kubernetes/pull/115379), [@artemvmin](https://github.com/artemvmin)) [SIG API Machinery, Architecture, Auth, CLI, Cloud Provider,...

- On compatible systems, a mounter's Unmount implementation is changed to not return an error when the specified target can be detected as not a mount point. On Linux, the behavior of detecting a mount point depends on `umount` command is validated when the mounter is created. Additionally, mount point checks will be skipped in CleanupMountPoint/CleanupMountWithForce if the mounter's Unmount having the changed behavior of not returning error when target...

- Fixed race condition in GCE between containerized mounter setup in the kubelet. ([#112195](https://github.com/kubernetes/kubernetes/pull/112195), [@mattcary](https://github.com/mattcary))

  // azureFile represents an Azure File Service mount on the host and bind mount to the pod.
  // +optional
  optional AzureFilePersistentVolumeSource azureFile = 13;

  // vsphereVolume represents a vSphere volume attached and mounted on kubelets host machine
  // +optional
  optional VsphereVirtualDiskVolumeSource vsphereVolume = 14;

  // quobyte represents a Quobyte mount on the host that shares a pod's lifetime

    *   Dynamic provisioning is not supported with this feature yet.
*   [alpha] Containerized mount utilities
    *   Allow mount utilities, used to mount volumes, to run inside a container instead of on the host.
*   Bug Fixes

* Get parent dir via canonical absolute path when trying to judge mount-point ([#58433](https://github.com/kubernetes/kubernetes/pull/58433), [@yue9944882](https://github.com/yue9944882))

#### Storage

* [stable] Mount options

  * The ability to specify mount options for volumes is moved from beta to stable.

  * A new `MountOptions` field in the `PersistentVolume` spec is available to specify mount options. This field replaces an annotation.

  * A new `MountOptions` field in the `StorageClass` spec allows configuration of mount options for dynamically provisioned volumes.

- On compatible systems, a mounter's Unmount implementation is changed to not return an error when the specified target can be detected as not a mount point. On Linux, the behavior of detecting a mount point depends on `umount` command is validated when the mounter is created. Additionally, mount point checks will be skipped in CleanupMountPoint/CleanupMountWithForce if the mounter's Unmount having the changed behavior of not returning error when target...

- Make sure auto-mounted subpath mount source is already mounted ([#112499](https://github.com/kubernetes/kubernetes/pull/112499), [@andyzhangx](http...