VsockUnixBackend

vmm::devices::virtio::vsock

Struct VsockUnixBackend 

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pub struct VsockUnixBackend { /* private fields */ }
Expand description

The vsock connection multiplexer.

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impl VsockMuxer

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pub fn new( cid: u64, host_sock_path: String, ) -> Result<Self, VsockUnixBackendError>

Muxer constructor.

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pub fn host_sock_path(&self) -> &str

Return the file system path of the host-side Unix socket.

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impl AsRawFd for VsockMuxer

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fn as_raw_fd(&self) -> RawFd

Get the FD to be registered for polling upstream (in the main VMM epoll loop, in this case).

This will be the muxer’s nested epoll FD.

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impl Debug for VsockMuxer

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

Formats the value using the given formatter. Read more
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impl Persist<'_> for VsockUnixBackend

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type State = VsockBackendState

The type of the object representing the state of the component.
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type ConstructorArgs = VsockUdsConstructorArgs

The type of the object holding the constructor arguments.
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type Error = VsockUnixBackendError

The type of the error that can occur while constructing the object.
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fn save(&self) -> Self::State

Returns the current state of the component.
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fn restore( constructor_args: Self::ConstructorArgs, state: &Self::State, ) -> Result<Self, Self::Error>

Constructs a component from a specified state.
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impl VsockChannel for VsockMuxer

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fn recv_pkt(&mut self, pkt: &mut VsockPacketRx) -> Result<(), VsockError>

Deliver a vsock packet to the guest vsock driver.

Retuns:

  • Ok(()): pkt has been successfully filled in; or
  • Err(VsockError::NoData): there was no available data with which to fill in the packet.
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fn send_pkt(&mut self, pkt: &VsockPacketTx) -> Result<(), VsockError>

Deliver a guest-generated packet to its destination in the vsock backend.

This absorbs unexpected packets, handles RSTs (by dropping connections), and forwards all the rest to their owning MuxerConnection.

Returns: always Ok(()) - the packet has been consumed, and its virtio TX buffers can be returned to the guest vsock driver.

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fn has_pending_rx(&self) -> bool

Check if the muxer has any pending RX data, with which to fill a guest-provided RX buffer.

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impl VsockEpollListener for VsockMuxer

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fn get_polled_evset(&self) -> EventSet

Get the epoll events to be polled upstream.

Since the polled FD is a nested epoll FD, we’re only interested in EPOLLIN events (i.e. some event occurred on one of the FDs registered under our epoll FD).

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fn notify(&mut self, _: EventSet)

Notify the muxer about a pending event having occured under its nested epoll FD.

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impl VsockBackend for VsockMuxer

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