pmem

Documentation

Index

• func GetDevicePath(devNumber uint32) string
• func Mount(ctx context.Context, device uint32, target string, ...) (err error)
• func Unmount(ctx context.Context, devNumber uint32, target string, ...) (err error)

Functions

func GetDevicePath

func GetDevicePath(devNumber uint32) string

GetDevicePath returns VPMem device path

func Mount

func Mount(
	ctx context.Context,
	device uint32,
	target string,
	mappingInfo *guestresource.LCOWVPMemMappingInfo,
	verityInfo *guestresource.DeviceVerityInfo,
) (err error)

Mount mounts the pmem device at `/dev/pmem<device>` to `target` in a basic scenario. If either mappingInfo or verityInfo are non-nil, the device-mapper framework is used to create linear and verity targets accordingly. If both are non-nil, the linear target is created first and used as the data/hash device for the verity target.

`target` will be created. On mount failure the created `target` will be automatically cleaned up.

Note: For now the platform only supports readonly pmem that is assumed to be `ext4`.

Note: both mappingInfo and verityInfo can be non-nil at the same time, in that case linear target is created first and it becomes the data/hash device for verity target.

func Unmount

func Unmount(
	ctx context.Context,
	devNumber uint32,
	target string,
	mappingInfo *guestresource.LCOWVPMemMappingInfo,
	verityInfo *guestresource.DeviceVerityInfo,
) (err error)

Unmount unmounts `target` and removes corresponding linear and verity targets when needed