Struct devicemapper::ThinPoolDev

pub struct ThinPoolDev { /* fields omitted */ }

DM construct to contain thin provisioned devices

Methods

impl ThinPoolDev

Use DM to create a "thin-pool". A "thin-pool" is shared space for other thin provisioned devices to use.

See section "Setting up a fresh pool device": https://www.kernel.org/doc/Documentation/device-mapper/thin-provisioning.txt

fn new(
    name: &str,
    dm: &DM,
    length: Sectors,
    data_block_size: Sectors,
    low_water_mark: DataBlocks,
    meta: LinearDev,
    data: LinearDev
) -> DmResult<ThinPoolDev>

Construct a new ThinPoolDev with the given data and meta devs. The ThinPoolDev is used as backing for by ThinDev.

fn meta_dev(&self) -> &LinearDev

Obtain the meta device that backs this thin pool device.

fn data_dev(&self) -> &LinearDev

Obtain the data device that backs this thin pool device.

fn data_block_size(&self) -> Sectors

Obtain the data block size for this thin pool device.

fn setup(
    name: &str,
    dm: &DM,
    length: Sectors,
    data_block_size: Sectors,
    low_water_mark: DataBlocks,
    meta: LinearDev,
    data: LinearDev
) -> DmResult<ThinPoolDev>

Set up an existing ThinPoolDev.

fn message(&self, dm: &DM, message: &str) -> DmResult<()>

send a message to DM thin pool

fn name(&self) -> &str

name of the thin pool device

fn dstr(&self) -> String

Get the "x:y" device string for this LinearDev

fn devnode(&self) -> DmResult<PathBuf>

path of the device node

fn status(&self, dm: &DM) -> DmResult<ThinPoolStatus>

Get the current status of the thinpool.

fn teardown(self, dm: &DM) -> DmResult<()>

Remove the device from DM

Trait Implementations

impl Debug for ThinPoolDev

fn fmt(&self, f: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.