Struct virtio_device::ring::Desc

#[repr(C)]
pub struct Desc { /* private fields */ }

Virtio descriptor data structure

Represents the in memory format of virtio descriptors and provides some accessors.

Implementations

impl Desc

pub fn has_next(&self) -> bool

Returns whether the next bit is set.

Typically the next method is preferred.

pub fn is_indirect(&self) -> bool

Returns whether the indirect bit is set.

pub fn write_only(&self) -> bool

Returns whether the write bit is set.

This flag should be ignored when is_indirect is true.

pub fn access_type(&self) -> DescAccess

Return the descriptor access type.

This is a convenience wrapper around write_only to provide a safer type.

pub fn next(&self) -> Option<u16>

Returns the next descriptor if there is one, otherwise a None.

pub fn data(&self) -> (u64, u32)

Returns the guest (address, length) pair representing the contents of this descriptor.

No validation of the address and length is performed. In particular the range could be invalid or wrap.

Trait Implementations

impl Clone for Desc

fn clone(&self) -> Desc

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Desc

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

Formats the value using the given formatter.

impl TryFrom<Desc> for Desc

type Error = DescError

The type returned in the event of a conversion error.

fn try_from(desc: Desc) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for Desc