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virtio-devices: Acknowledge a device being paused

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Using the Rust Barrier mechanism, this patch forces each virtio device
to acknowledge they've been correctly paused before going further.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2020-08-11 16:05:06 +02:00
parent fd48779a0d
commit aa57762c4f
17 changed files with 162 additions and 54 deletions
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5
virtio-devices/src/net_util.rs
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@@ -10,7 +10,7 @@ use net_util::MacAddr;
use serde::ser::{Serialize, SerializeStruct, Serializer};
use std::os::unix::io::{AsRawFd, RawFd};
use std::sync::atomic::AtomicBool;
use std::sync::Arc;
use std::sync::{Arc, Barrier};
use virtio_bindings::bindings::virtio_net::*;
use vm_memory::{
ByteValued, Bytes, GuestAddressSpace, GuestMemoryAtomic, GuestMemoryError, GuestMemoryMmap,
@@ -177,10 +177,11 @@ impl NetCtrlEpollHandler {
pub fn run_ctrl(
&mut self,
paused: Arc<AtomicBool>,
paused_sync: Arc<Barrier>,
) -> std::result::Result<(), EpollHelperError> {
let mut helper = EpollHelper::new(&self.kill_evt, &self.pause_evt)?;
helper.add_event(self.ctrl_q.queue_evt.as_raw_fd(), CTRL_QUEUE_EVENT)?;
helper.run(paused, self)?;
helper.run(paused, paused_sync, self)?;
Ok(())
}