Struct VirtioNetworkRuntime 

pub struct VirtioNetworkRuntime { /* private fields */ }

Running host-side virtio-net runtime for one guest NIC.

Ownership model:

• one runtime instance corresponds to one guest virtio NIC
• it owns the queue set shared by the worker threads
• it owns the libkrun Unix-stream bridge threads
• it owns the published-port listener threads
• it owns the smoltcp poll thread

Dropping the runtime is the shutdown signal. Drop marks the shared queues as shutting down, wakes blocked workers, and joins the poll thread.

Implementations

impl VirtioNetworkRuntime

pub fn egress_bytes(&self) -> u64

Cumulative guest-outbound (egress) bytes on this NIC since boot, at the ethernet-frame level. The launcher polls this to surface per-machine egress to the node API for billing. TSI VMs have no virtio runtime, so egress is unavailable for them (a documented metering gap).

pub fn egress_counter(&self) -> Arc<AtomicU64>

A cheap, cloneable read handle to this NIC’s egress counter, so the launcher can spawn a thread that periodically flushes the value to the VM’s runtime dir for the node API to read (the runtime is not Clone).

pub fn block_until_shutdown(self)

Take ownership of the runtime and block until the libkrun stream closes (the frame reader marks the queues shutting down on EOF), then drop it for a graceful shutdown. Used on Windows, where the runtime is built on the accept thread: that thread parks here so the runtime — and its worker threads — live for the whole VM lifetime instead of being dropped at the end of the accept callback.

Trait Implementations

impl Drop for VirtioNetworkRuntime

fn drop(&mut self)

Shut down the worker threads in a bounded, cooperative way.

The queue shutdown flag wakes the frame bridge and smoltcp poll loop so they can exit on their own. We only explicitly join the poll thread here because the frame bridge joins its own threads in its own Drop.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.