- Do not unmount and mount subpath bind mounts during container creation unless bind mount changes ([#105512](https://github.com/kubernetes/kubernetes/pull/105512), [@gnufied](https://github.com/gnufied)) [SIG Storage]

pkg syscall (darwin-386), func Umask(int) int
pkg syscall (darwin-386), func Undelete(string) error
pkg syscall (darwin-386), func UnixRights(...int) []uint8
pkg syscall (darwin-386), func Unmount(string, int) error
pkg syscall (darwin-386), func Wait4(int, *WaitStatus, int, *Rusage) (int, error)
pkg syscall (darwin-386), func Write(int, []uint8) (int, error)
pkg syscall (darwin-386), method (*Cmsghdr) SetLen(int)

- AzureFile and CephFS use the new Mount library that prevents logging of sensitive mount options. ([#88684](https://github.com/kubernetes/kubernetes/pull/88684), [@saad-ali](https://github.com/saad-ali)) [SIG Storage]

pkg syscall (netbsd-arm64-cgo), func Truncate(string, int64) error
pkg syscall (netbsd-arm64-cgo), func Umask(int) int
pkg syscall (netbsd-arm64-cgo), func UnixRights(...int) []uint8
pkg syscall (netbsd-arm64-cgo), func Unmount(string, int) error
pkg syscall (netbsd-arm64-cgo), func Wait4(int, *WaitStatus, int, *Rusage) (int, error)
pkg syscall (netbsd-arm64-cgo), func Write(int, []uint8) (int, error)

vSphere. ([#59328](https://github.com/kubernetes/kubernetes/pull/59328), [@divyenpatel](https://github.com/divyenpatel))

* Emit number of bound and unbound persistent volumes as Metrics. This PR adds four kinds of Volume Metrics for kube-controller-manager: bound PVC numbers, unbound PVC numbers, bound PV numbers and unbound PV numbers. The PVC metrics use namespace as dimension and the PV metrics use StorageClassName as its dimension. With these metrics we can better monitor the use...

* Local volume source paths that are directories and not mount points fail to unmount.  A fix is in process ([#48331](https://github.com/kubernetes/kubernetes/issues/48331)).

#### 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.

pkg syscall (freebsd-arm64), func Umask(int) int
pkg syscall (freebsd-arm64), func Undelete(string) error
pkg syscall (freebsd-arm64), func UnixRights(...int) []uint8
pkg syscall (freebsd-arm64), func Unmount(string, int) error
pkg syscall (freebsd-arm64), func Wait4(int, *WaitStatus, int, *Rusage) (int, error)
pkg syscall (freebsd-arm64), func Write(int, []uint8) (int, error)

* fix mount unmount failure for a Windows pod ([#63272](https://github.com/kubernetes/kubernetes/pull/63272), [@andyzhangx](https://github.com/andyzhangx))
* Fix concurrent map access panic ([#65327](https://github.com/kubernetes/kubernetes/pull/65327), [@dashpole](https://github.com/dashpole))
    * Don't watch .mount cgroups to reduce number of inotify watches

 - [Action Required] CSI drivers that call IsLikelyNotMountPoint should not assume false means that the path is a mount point. Each CSI driver needs to make sure correct usage of return value of IsLikelyNotMountPoint because if the file is an irregular file but not a mount point is acceptable ([#129370](https://github.com/kubernetes/kubernetes/pull/129370), [@andyzhangx](https://github.com/andyzhangx)) [SIG Storage and Windows]