Struct VirtioQueueCallbackWork 

pub struct VirtioQueueCallbackWork {
    pub payload: Vec<VirtioQueuePayload>,
    /* private fields */
}

A descriptor chain popped from a VirtioQueue.

The device must call VirtioQueue::complete exactly once to post a completion to the guest’s used ring. Dropping without completing is a bug and will not automatically post a completion.

Fields

payload: Vec<VirtioQueuePayload>

Implementations

impl VirtioQueueCallbackWork

pub fn descriptor_index(&self) -> u16

pub fn into_completion(self) -> QueueCompletion

Discards the payload buffer descriptors and returns the lightweight QueueCompletion token, which carries only the state VirtioQueue::complete_prepared needs to publish the used ring entry.

Use this to buffer a completion (e.g. for in-order publication) without retaining the full payload.

pub fn get_payload_length(&self, writeable: bool) -> u64

pub fn read( &self, mem: &GuestMemory, target: &mut [u8], ) -> Result<usize, GuestMemoryError>

pub fn read_at_offset( &self, offset: u64, mem: &GuestMemory, target: &mut [u8], ) -> Result<usize, GuestMemoryError>

Read readable payload into target, skipping the first offset bytes of readable data.

pub fn write_at_offset( &self, offset: u64, mem: &GuestMemory, source: &[u8], ) -> Result<(), VirtioWriteError>

pub fn write( &self, mem: &GuestMemory, source: &[u8], ) -> Result<(), VirtioWriteError>