kubernetes/pkg/volume/util/device_util_linux.go

// FindMultipathDeviceForDevice given a device name like /dev/sdx, find the devicemapper parent
func (handler *deviceHandler) FindMultipathDeviceForDevice(device string) string { … }

// findDeviceForPath Find the underlying disk for a linked path such as /dev/disk/by-path/XXXX or /dev/mapper/XXXX
// will return sdX or hdX etc, if /dev/sdX is passed in then sdX will be returned
func findDeviceForPath(path string, io IoUtil) (string, error) { … }

// FindSlaveDevicesOnMultipath given a dm name like /dev/dm-1, find all devices
// which are managed by the devicemapper dm-1.
func (handler *deviceHandler) FindSlaveDevicesOnMultipath(dm string) []string { … }

// GetISCSIPortalHostMapForTarget given a target iqn, find all the scsi hosts logged into
// that target. Returns a map of iSCSI portals (string) to SCSI host numbers (integers).
//
//	For example: {
//	   "192.168.30.7:3260": 2,
//	   "192.168.30.8:3260": 3,
//	}
func (handler *deviceHandler) GetISCSIPortalHostMapForTarget(targetIqn string) (map[string]int, error) { … }

// FindDevicesForISCSILun given an iqn, and lun number, find all the devices
// corresponding to that LUN.
func (handler *deviceHandler) FindDevicesForISCSILun(targetIqn string, lun int) ([]string, error) { … }