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virtio-devices: net: Signal control queue was used if necessary

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Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2022-03-14 16:16:45 +00:00
parent c5afea5b85
commit 21a9ae3459
1 changed files with 30 additions and 2 deletions
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32
virtio-devices/src/net.rs
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@ -53,9 +53,20 @@ pub struct NetCtrlEpollHandler {
pub queue_evt: EventFd,
pub queue: Queue<GuestMemoryAtomic<GuestMemoryMmap>>,
pub access_platform: Option<Arc<dyn AccessPlatform>>,
interrupt_cb: Arc<dyn VirtioInterrupt>,
queue_index: u16,
}
impl NetCtrlEpollHandler {
fn signal_used_queue(&self, queue_index: u16) -> result::Result<(), DeviceError> {
self.interrupt_cb
.trigger(VirtioInterruptType::Queue(queue_index))
.map_err(|e| {
error!("Failed to signal used queue: {:?}", e);
DeviceError::FailedSignalingUsedQueue(e)
})
}
pub fn run_ctrl(
&mut self,
paused: Arc<AtomicBool>,
@ -84,6 +95,20 @@ impl EpollHelperHandler for NetCtrlEpollHandler {
{
error!("Failed to process control queue: {:?}", e);
return true;
} else {
match self.queue.needs_notification() {
Ok(true) => {
if let Err(e) = self.signal_used_queue(self.queue_index) {
error!("Error signalling that control queue was used: {:?}", e);
return true;
}
}
Ok(false) => {}
Err(e) => {
error!("Error getting notification state of control queue: {}", e);
return true;
}
}
}
}
_ => {
@ -568,8 +593,9 @@ impl VirtioDevice for Net {
let num_queues = queues.len();
let event_idx = self.common.feature_acked(VIRTIO_RING_F_EVENT_IDX.into());
if self.common.feature_acked(VIRTIO_NET_F_CTRL_VQ.into()) && num_queues % 2 != 0 {
let mut ctrl_queue = queues.remove(num_queues - 1);
let ctrl_queue_evt = queue_evts.remove(num_queues - 1);
let ctrl_queue_index = num_queues - 1;
let mut ctrl_queue = queues.remove(ctrl_queue_index);
let ctrl_queue_evt = queue_evts.remove(ctrl_queue_index);
ctrl_queue.set_event_idx(event_idx);
@ -581,6 +607,8 @@ impl VirtioDevice for Net {
queue: ctrl_queue,
queue_evt: ctrl_queue_evt,
access_platform: self.common.access_platform.clone(),
queue_index: ctrl_queue_index as u16,
interrupt_cb: interrupt_cb.clone(),
};
let paused = self.common.paused.clone();