Struct vmm_vhost::message::VhostUserInflight

#[repr(C)]
pub struct VhostUserInflight {
    pub mmap_size: u64,
    pub mmap_offset: u64,
    pub num_queues: u16,
    pub queue_size: u16,
    pub _padding: [u8; 4],
}

Single memory region descriptor as payload for ADD_MEM_REG and REM_MEM_REG requests. This struct is defined by qemu and compiles with arch-dependent padding. Interestingly, all our supported archs (arm, aarch64, x86_64) has same data layout for this type.

Fields

mmap_size: u64

Size of the area to track inflight I/O.

mmap_offset: u64

Offset of this area from the start of the supplied file descriptor.

num_queues: u16

Number of virtqueues.

queue_size: u16

Size of virtqueues.

_padding: [u8; 4]

implicit padding on 64-bit platforms

Implementations

impl VhostUserInflight

pub fn new( mmap_size: u64, mmap_offset: u64, num_queues: u16, queue_size: u16 ) -> Self

Create a new instance.

Trait Implementations

impl AsBytes for VhostUserInflight

where u64: AsBytes, u16: AsBytes, [u8; 4]: AsBytes, HasPadding<VhostUserInflight, { _ }>: ShouldBe<false>,

fn as_bytes(&self) -> &[u8]

Gets the bytes of this value.

fn as_bytes_mut(&mut self) -> &mut [u8]

where Self: FromBytes,

Gets the bytes of this value mutably.

fn write_to(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to bytes.

fn write_to_prefix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the prefix of bytes.

fn write_to_suffix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the suffix of bytes.

impl Clone for VhostUserInflight

fn clone(&self) -> VhostUserInflight

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for VhostUserInflight

fn default() -> VhostUserInflight

Returns the “default value” for a type.

impl FromBytes for VhostUserInflight

where u64: FromBytes, u16: FromBytes, [u8; 4]: FromBytes,

fn ref_from(bytes: &[u8]) -> Option<&Self>

where Self: Sized,

Interprets the given bytes as a &Self without copying.

fn ref_from_prefix(bytes: &[u8]) -> Option<&Self>

where Self: Sized,

Interprets the prefix of the given bytes as a &Self without copying.

fn ref_from_suffix(bytes: &[u8]) -> Option<&Self>

where Self: Sized,

Interprets the suffix of the given bytes as a &Self without copying.

fn mut_from(bytes: &mut [u8]) -> Option<&mut Self>

where Self: Sized + AsBytes,

Interprets the given bytes as a &mut Self without copying.

fn mut_from_prefix(bytes: &mut [u8]) -> Option<&mut Self>

where Self: Sized + AsBytes,

Interprets the prefix of the given bytes as a &mut Self without copying.

fn mut_from_suffix(bytes: &mut [u8]) -> Option<&mut Self>

where Self: Sized + AsBytes,

Interprets the suffix of the given bytes as a &mut Self without copying.

fn slice_from(bytes: &[u8]) -> Option<&[Self]>

where Self: Sized,

Interprets the given bytes as a &[Self] without copying.

fn slice_from_prefix(bytes: &[u8], count: usize) -> Option<(&[Self], &[u8])>

where Self: Sized,

Interprets the prefix of the given bytes as a &[Self] with length equal to count without copying.

fn slice_from_suffix(bytes: &[u8], count: usize) -> Option<(&[u8], &[Self])>

where Self: Sized,

Interprets the suffix of the given bytes as a &[Self] with length equal to count without copying.

fn mut_slice_from(bytes: &mut [u8]) -> Option<&mut [Self]>

where Self: Sized + AsBytes,

Interprets the given bytes as a &mut [Self] without copying.

fn mut_slice_from_prefix( bytes: &mut [u8], count: usize ) -> Option<(&mut [Self], &mut [u8])>

where Self: Sized + AsBytes,

Interprets the prefix of the given bytes as a &mut [Self] with length equal to count without copying.

fn mut_slice_from_suffix( bytes: &mut [u8], count: usize ) -> Option<(&mut [u8], &mut [Self])>

where Self: Sized + AsBytes,

Interprets the suffix of the given bytes as a &mut [Self] with length equal to count without copying.

fn read_from(bytes: &[u8]) -> Option<Self>

where Self: Sized,

Reads a copy of Self from bytes.

fn read_from_prefix(bytes: &[u8]) -> Option<Self>

where Self: Sized,

Reads a copy of Self from the prefix of bytes.

fn read_from_suffix(bytes: &[u8]) -> Option<Self>

where Self: Sized,

Reads a copy of Self from the suffix of bytes.

impl FromZeroes for VhostUserInflight

where u64: FromZeroes, u16: FromZeroes, [u8; 4]: FromZeroes,

fn zero(&mut self)

Overwrites self with zeroes.

fn new_zeroed() -> Self

where Self: Sized,

Creates an instance of Self from zeroed bytes.

impl VhostUserMsgValidator for VhostUserInflight

fn is_valid(&self) -> bool

Validate message syntax only. It doesn’t validate message semantics such as protocol version number and dependency on feature flags etc.

impl Copy for VhostUserInflight