Struct DescriptorChain 

pub struct DescriptorChain {
    pub index: u16,
    pub addr: GuestAddress,
    pub len: u32,
    pub flags: u16,
    pub next: u16,
    /* private fields */
}

A virtio descriptor chain.

Fields

index: u16

Index into the descriptor table

addr: GuestAddress

Guest physical address of device specific data

len: u32

Length of device specific data

flags: u16

Includes next, write, and indirect bits

next: u16

Index into the descriptor table of the next descriptor if flags has the next bit set

Implementations

impl DescriptorChain

pub fn has_next(&self) -> bool

Gets if this descriptor chain has another descriptor chain linked after it.

pub fn is_write_only(&self) -> bool

If the driver designated this as a write only descriptor.

If this is false, this descriptor is read only. Write only means the emulated device can write and the driver can read.

pub fn next_descriptor(&self) -> Option<Self>

Gets the next descriptor in this descriptor chain, if there is one.

Note that this is distinct from the next descriptor chain returned by AvailIter, which is the head of the next available descriptor chain.

Trait Implementations

impl Clone for DescriptorChain

fn clone(&self) -> DescriptorChain

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DescriptorChain

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

Formats the value using the given formatter.

impl IntoIterator for DescriptorChain

type Item = DescriptorChain

The type of the elements being iterated over.

type IntoIter = DescriptorIterator

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl Copy for DescriptorChain