Struct devicemapper::ThinDev

pub struct ThinDev { /* fields omitted */ }

DM construct for a thin block device

Methods

impl ThinDev

support use of DM for thin provisioned devices over pools

fn new(
    name: &DmName,
    dm: &DM,
    thin_pool: &ThinPoolDev,
    thin_id: ThinDevId,
    length: Sectors
) -> DmResult<ThinDev>

Use the given ThinPoolDev as backing space for a newly constructed thin provisioned ThinDev returned by new().

fn setup(
    name: &DmName,
    dm: &DM,
    thin_pool: &ThinPoolDev,
    thin_id: ThinDevId,
    length: Sectors
) -> DmResult<ThinDev>

Set up an existing thindev. By "existing" is here meant that metadata for this thin device exists on the metadata device for its thin pool. TODO: If the device is already known to the kernel, verify that kernel model matches arguments.

fn id(&self) -> ThinDevId

return the thin id of the linear device

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

Get the current status of the thin device.

fn extend(&mut self, dm: &DM, sectors: Sectors) -> DmResult<()>

Extend the thin device's (virtual) size by the number of sectors given.

fn destroy(self, dm: &DM, thin_pool: &ThinPoolDev) -> DmResult<()>

Tear down the DM device, and also delete resources associated with its thin id from the thinpool.

Trait Implementations

impl Debug for ThinDev

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

Formats the value using the given formatter.

impl DmDevice for ThinDev

fn devnode(&self) -> PathBuf

The device's device node.

fn dstr(&self) -> String

The device's number, formatted as a string maj:min.

fn name(&self) -> &DmName

The device's name.

fn size(&self) -> Sectors

The number of sectors available for user data.

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

Erase the kernel's memory of this device.