Trait DriverChainBuffer 

pub trait DriverChainBuffer: Debug {
    type Error;

    // Required methods
    fn device_readable_len(&self) -> u64;
    fn device_writable_len(&self) -> u64;
    fn write_device_readable(
        &mut self,
        offset: u64,
        source: &[u8],
    ) -> Result<(), Self::Error>;
    fn read_device_writable(
        &self,
        offset: u64,
        target: &mut [u8],
    ) -> Result<(), Self::Error>;
}

Driver-owned byte access for one unpublished or reclaimed descriptor chain.

The readable side is written by the driver and later read by the device. The writable side is written by the device and may be read by the driver only after used-ring reclamation. Methods are nonblocking and allocation-free; queue ownership prevents calls while a chain is published.

Required Associated Types

type Error

Concrete transport byte-access failure.

Required Methods

fn device_readable_len(&self) -> u64

Total bytes readable by the device.

fn device_writable_len(&self) -> u64

Total bytes writable by the device.

fn write_device_readable( &mut self, offset: u64, source: &[u8], ) -> Result<(), Self::Error>

Write an exact logical range into the device-readable side.

fn read_device_writable( &self, offset: u64, target: &mut [u8], ) -> Result<(), Self::Error>

Read an exact logical range from the device-writable side after completion.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors