Struct PartitionBackend 

pub struct PartitionBackend { /* private fields */ }

PartitionBackend is an implementation of block_server’s Interface which is backed by a windowed view of the underlying GPT device.

Implementations

impl PartitionBackend

pub fn new(partition: Arc<GptPartition>, offset_map: OffsetMap) -> Arc<Self>

If offset_map is non-empty, the partition will pass through requests using the provided offset map. Otherwise, the partition will proxy I/O requests (and read, write, etc will be called on this instance).

pub fn update_info(&self, info: PartitionInfo)

Updates the info.

Trait Implementations

impl Interface for PartitionBackend

async fn open_session( &self, session_manager: Arc<SessionManager<Self>>, stream: SessionRequestStream, offset_map: OffsetMap, block_size: u32, ) -> Result<(), Error>

Runs stream to completion.

async fn on_attach_vmo(&self, vmo: &Vmo) -> Result<(), Status>

Called whenever a VMO is attached, prior to the VMO’s usage in any other methods. Whilst the VMO is attached, vmo will keep the same address so it is safe to use the pointer value (as, say, a key into a HashMap).

fn on_detach_vmo(&self, vmo: &Vmo)

Called whenever a VMO is detached.

fn get_info(&self) -> Cow<'_, DeviceInfo>

Called to get block/partition information.

async fn read( &self, device_block_offset: u64, block_count: u32, vmo: &Arc<Vmo>, vmo_offset: u64, opts: ReadOptions, trace_flow_id: Option<NonZero<u64>>, ) -> Result<(), Status>

Called for a request to read bytes.

async fn write( &self, device_block_offset: u64, length: u32, vmo: &Arc<Vmo>, vmo_offset: u64, opts: WriteOptions, trace_flow_id: Option<NonZero<u64>>, ) -> Result<(), Status>

Called for a request to write bytes.

async fn flush(&self, trace_flow_id: Option<NonZero<u64>>) -> Result<(), Status>

Called to flush the device.

async fn trim( &self, device_block_offset: u64, block_count: u32, trace_flow_id: Option<NonZero<u64>>, ) -> Result<(), Status>

Called to trim a region.

fn get_volume_info( &self, ) -> impl Future<Output = Result<(VolumeManagerInfo, VolumeInfo), Status>> + Send

Called to handle the GetVolumeInfo FIDL call.

fn query_slices( &self, _start_slices: &[u64], ) -> impl Future<Output = Result<Vec<VsliceRange>, Status>> + Send

Called to handle the QuerySlices FIDL call.

fn extend( &self, _start_slice: u64, _slice_count: u64, ) -> impl Future<Output = Result<(), Status>> + Send

Called to handle the Extend FIDL call.

fn shrink( &self, _start_slice: u64, _slice_count: u64, ) -> impl Future<Output = Result<(), Status>> + Send

Called to handle the Shrink FIDL call.