mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
synced 2024-08-23 00:11:16 +00:00
As the first step to complete live-migration with tracking dirty-pages written by the VMM, this commit patches the dependent vm-memory crate to the upstream version with the dirty-page-tracking capability. Most changes are due to the updated `GuestMemoryMmap`, `GuestRegionMmap`, and `MmapRegion` structs which are taking an additional generic type parameter to specify what 'bitmap backend' is used. The above changes should be transparent to the rest of the code base, e.g. all unit/integration tests should pass without additional changes. Signed-off-by: Bo Chen <chen.bo@intel.com>
732 lines
25 KiB
Rust
732 lines
25 KiB
Rust
// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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//
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// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the THIRD-PARTY file.
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use super::Error as DeviceError;
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use super::{
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ActivateError, ActivateResult, EpollHelper, EpollHelperError, EpollHelperHandler, Queue,
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RateLimiterConfig, VirtioCommon, VirtioDevice, VirtioDeviceType, VirtioInterruptType,
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EPOLL_HELPER_EVENT_LAST,
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};
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use crate::seccomp_filters::{get_seccomp_filter, Thread};
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use crate::GuestMemoryMmap;
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use crate::VirtioInterrupt;
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use net_util::CtrlQueue;
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use net_util::{
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build_net_config_space, build_net_config_space_with_mq, open_tap,
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virtio_features_to_tap_offload, MacAddr, NetCounters, NetQueuePair, OpenTapError, RxVirtio,
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Tap, TapError, TxVirtio, VirtioNetConfig,
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};
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use seccomp::{SeccompAction, SeccompFilter};
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use std::net::Ipv4Addr;
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use std::num::Wrapping;
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use std::os::unix::io::{AsRawFd, RawFd};
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use std::result;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::{Arc, Barrier};
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use std::thread;
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use std::vec::Vec;
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use std::{collections::HashMap, convert::TryInto};
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use versionize::{VersionMap, Versionize, VersionizeResult};
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use versionize_derive::Versionize;
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use virtio_bindings::bindings::virtio_net::*;
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use virtio_bindings::bindings::virtio_ring::VIRTIO_RING_F_EVENT_IDX;
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use vm_memory::{ByteValued, GuestAddressSpace, GuestMemoryAtomic};
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use vm_migration::VersionMapped;
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use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
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use vmm_sys_util::eventfd::EventFd;
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/// Control queue
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// Event available on the control queue.
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const CTRL_QUEUE_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 1;
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pub struct NetCtrlEpollHandler {
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pub mem: GuestMemoryAtomic<GuestMemoryMmap>,
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pub kill_evt: EventFd,
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pub pause_evt: EventFd,
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pub ctrl_q: CtrlQueue,
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pub queue_evt: EventFd,
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pub queue: Queue,
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}
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impl NetCtrlEpollHandler {
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pub fn run_ctrl(
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&mut self,
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paused: Arc<AtomicBool>,
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paused_sync: Arc<Barrier>,
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) -> std::result::Result<(), EpollHelperError> {
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let mut helper = EpollHelper::new(&self.kill_evt, &self.pause_evt)?;
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helper.add_event(self.queue_evt.as_raw_fd(), CTRL_QUEUE_EVENT)?;
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helper.run(paused, paused_sync, self)?;
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Ok(())
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}
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}
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impl EpollHelperHandler for NetCtrlEpollHandler {
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fn handle_event(&mut self, _helper: &mut EpollHelper, event: &epoll::Event) -> bool {
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let ev_type = event.data as u16;
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match ev_type {
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CTRL_QUEUE_EVENT => {
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let mem = self.mem.memory();
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if let Err(e) = self.queue_evt.read() {
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error!("failed to get ctl queue event: {:?}", e);
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return true;
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}
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if let Err(e) = self.ctrl_q.process(&mem, &mut self.queue) {
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error!("failed to process ctrl queue: {:?}", e);
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return true;
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}
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}
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_ => {
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error!("Unknown event for virtio-net");
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return true;
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}
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}
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false
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}
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}
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/// Rx/Tx queue pair
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// The guest has made a buffer available to receive a frame into.
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pub const RX_QUEUE_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 1;
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// The transmit queue has a frame that is ready to send from the guest.
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pub const TX_QUEUE_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 2;
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// A frame is available for reading from the tap device to receive in the guest.
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pub const RX_TAP_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 3;
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// New 'wake up' event from the rx rate limiter
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pub const RX_RATE_LIMITER_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 4;
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// New 'wake up' event from the tx rate limiter
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pub const TX_RATE_LIMITER_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 5;
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#[derive(Debug)]
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pub enum Error {
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/// Failed to open taps.
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OpenTap(OpenTapError),
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// Using existing tap
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TapError(TapError),
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// Error calling dup() on tap fd
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DuplicateTapFd(std::io::Error),
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}
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pub type Result<T> = result::Result<T, Error>;
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struct NetEpollHandler {
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net: NetQueuePair,
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interrupt_cb: Arc<dyn VirtioInterrupt>,
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kill_evt: EventFd,
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pause_evt: EventFd,
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queue_pair: Vec<Queue>,
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queue_evt_pair: Vec<EventFd>,
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// Always generate interrupts until the driver has signalled to the device.
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// This mitigates a problem with interrupts from tap events being "lost" upon
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// a restore as the vCPU thread isn't ready to handle the interrupt. This causes
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// issues when combined with VIRTIO_RING_F_EVENT_IDX interrupt suppression.
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driver_awake: bool,
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}
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impl NetEpollHandler {
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fn signal_used_queue(&self, queue: &Queue) -> result::Result<(), DeviceError> {
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self.interrupt_cb
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.trigger(&VirtioInterruptType::Queue, Some(queue))
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.map_err(|e| {
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error!("Failed to signal used queue: {:?}", e);
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DeviceError::FailedSignalingUsedQueue(e)
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})
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}
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fn handle_rx_event(&mut self) -> result::Result<(), DeviceError> {
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let queue_evt = &self.queue_evt_pair[0];
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if let Err(e) = queue_evt.read() {
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error!("Failed to get rx queue event: {:?}", e);
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}
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self.net.rx_desc_avail = true;
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let rate_limit_reached = self
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.net
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.rx_rate_limiter
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.as_ref()
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.map_or(false, |r| r.is_blocked());
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// Start to listen on RX_TAP_EVENT only when the rate limit is not reached
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if !self.net.rx_tap_listening && !rate_limit_reached {
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net_util::register_listener(
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self.net.epoll_fd.unwrap(),
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self.net.tap.as_raw_fd(),
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epoll::Events::EPOLLIN,
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u64::from(self.net.tap_event_id),
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)
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.map_err(DeviceError::IoError)?;
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self.net.rx_tap_listening = true;
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}
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Ok(())
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}
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fn process_tx(&mut self) -> result::Result<(), DeviceError> {
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if self
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.net
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.process_tx(&mut self.queue_pair[1])
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.map_err(DeviceError::NetQueuePair)?
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|| !self.driver_awake
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{
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self.signal_used_queue(&self.queue_pair[1])?;
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debug!("Signalling TX queue");
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} else {
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debug!("Not signalling TX queue");
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}
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Ok(())
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}
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fn handle_tx_event(&mut self) -> result::Result<(), DeviceError> {
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let queue_evt = &self.queue_evt_pair[1];
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if let Err(e) = queue_evt.read() {
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error!("Failed to get tx queue event: {:?}", e);
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}
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let rate_limit_reached = self
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.net
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.tx_rate_limiter
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.as_ref()
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.map_or(false, |r| r.is_blocked());
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if !rate_limit_reached {
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self.process_tx()?;
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}
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Ok(())
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}
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fn handle_rx_tap_event(&mut self) -> result::Result<(), DeviceError> {
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if self
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.net
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.process_rx(&mut self.queue_pair[0])
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.map_err(DeviceError::NetQueuePair)?
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|| !self.driver_awake
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{
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self.signal_used_queue(&self.queue_pair[0])?;
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debug!("Signalling RX queue");
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} else {
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debug!("Not signalling RX queue");
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}
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Ok(())
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}
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fn run(
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&mut self,
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paused: Arc<AtomicBool>,
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paused_sync: Arc<Barrier>,
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) -> result::Result<(), EpollHelperError> {
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let mut helper = EpollHelper::new(&self.kill_evt, &self.pause_evt)?;
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helper.add_event(self.queue_evt_pair[0].as_raw_fd(), RX_QUEUE_EVENT)?;
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helper.add_event(self.queue_evt_pair[1].as_raw_fd(), TX_QUEUE_EVENT)?;
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if let Some(rate_limiter) = &self.net.rx_rate_limiter {
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helper.add_event(rate_limiter.as_raw_fd(), RX_RATE_LIMITER_EVENT)?;
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}
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if let Some(rate_limiter) = &self.net.tx_rate_limiter {
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helper.add_event(rate_limiter.as_raw_fd(), TX_RATE_LIMITER_EVENT)?;
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}
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// If there are some already available descriptors on the RX queue,
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// then we can start the thread while listening onto the TAP.
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if self.queue_pair[0]
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.available_descriptors(&self.net.mem.as_ref().unwrap().memory())
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.unwrap()
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{
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helper.add_event(self.net.tap.as_raw_fd(), RX_TAP_EVENT)?;
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self.net.rx_tap_listening = true;
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info!("Listener registered at start");
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}
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// The NetQueuePair needs the epoll fd.
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self.net.epoll_fd = Some(helper.as_raw_fd());
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helper.run(paused, paused_sync, self)?;
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Ok(())
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}
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}
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impl EpollHelperHandler for NetEpollHandler {
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fn handle_event(&mut self, _helper: &mut EpollHelper, event: &epoll::Event) -> bool {
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let ev_type = event.data as u16;
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match ev_type {
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RX_QUEUE_EVENT => {
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self.driver_awake = true;
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if let Err(e) = self.handle_rx_event() {
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error!("Error processing RX queue: {:?}", e);
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return true;
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}
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}
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TX_QUEUE_EVENT => {
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self.driver_awake = true;
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if let Err(e) = self.handle_tx_event() {
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error!("Error processing TX queue: {:?}", e);
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return true;
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}
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}
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RX_TAP_EVENT => {
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if let Err(e) = self.handle_rx_tap_event() {
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error!("Error processing tap queue: {:?}", e);
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return true;
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}
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}
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RX_RATE_LIMITER_EVENT => {
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if let Some(rate_limiter) = &mut self.net.rx_rate_limiter {
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// Upon rate limiter event, call the rate limiter handler and register the
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// TAP fd for further processing if some RX buffers are available
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match rate_limiter.event_handler() {
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Ok(_) => {
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if !self.net.rx_tap_listening && self.net.rx_desc_avail {
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if let Err(e) = net_util::register_listener(
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self.net.epoll_fd.unwrap(),
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self.net.tap.as_raw_fd(),
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epoll::Events::EPOLLIN,
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u64::from(self.net.tap_event_id),
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) {
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error!("Error register_listener with `RX_RATE_LIMITER_EVENT`: {:?}", e);
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return true;
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}
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self.net.rx_tap_listening = true;
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}
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}
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Err(e) => {
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error!("Error from 'rate_limiter.event_handler()': {:?}", e);
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return true;
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}
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}
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} else {
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error!("Unexpected RX_RATE_LIMITER_EVENT");
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return true;
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}
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}
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TX_RATE_LIMITER_EVENT => {
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if let Some(rate_limiter) = &mut self.net.tx_rate_limiter {
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// Upon rate limiter event, call the rate limiter handler
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// and restart processing the queue.
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match rate_limiter.event_handler() {
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Ok(_) => {
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self.driver_awake = true;
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if let Err(e) = self.process_tx() {
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error!("Error processing TX queue: {:?}", e);
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return true;
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}
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}
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Err(e) => {
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error!("Error from 'rate_limiter.event_handler()': {:?}", e);
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return true;
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}
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}
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} else {
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error!("Unexpected TX_RATE_LIMITER_EVENT");
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return true;
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}
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}
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_ => {
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error!("Unknown event: {}", ev_type);
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return true;
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}
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}
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false
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}
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}
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pub struct Net {
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common: VirtioCommon,
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id: String,
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taps: Vec<Tap>,
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config: VirtioNetConfig,
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ctrl_queue_epoll_thread: Option<thread::JoinHandle<()>>,
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counters: NetCounters,
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seccomp_action: SeccompAction,
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rate_limiter_config: Option<RateLimiterConfig>,
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}
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#[derive(Versionize)]
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pub struct NetState {
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pub avail_features: u64,
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pub acked_features: u64,
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pub config: VirtioNetConfig,
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pub queue_size: Vec<u16>,
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}
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impl VersionMapped for NetState {}
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impl Net {
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/// Create a new virtio network device with the given TAP interface.
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#[allow(clippy::too_many_arguments)]
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pub fn new_with_tap(
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id: String,
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taps: Vec<Tap>,
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guest_mac: Option<MacAddr>,
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iommu: bool,
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num_queues: usize,
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queue_size: u16,
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seccomp_action: SeccompAction,
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rate_limiter_config: Option<RateLimiterConfig>,
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) -> Result<Self> {
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let mut avail_features = 1 << VIRTIO_NET_F_CSUM
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| 1 << VIRTIO_NET_F_CTRL_GUEST_OFFLOADS
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| 1 << VIRTIO_NET_F_GUEST_CSUM
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| 1 << VIRTIO_NET_F_GUEST_ECN
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| 1 << VIRTIO_NET_F_GUEST_TSO4
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| 1 << VIRTIO_NET_F_GUEST_TSO6
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| 1 << VIRTIO_NET_F_GUEST_UFO
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| 1 << VIRTIO_NET_F_HOST_ECN
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| 1 << VIRTIO_NET_F_HOST_TSO4
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| 1 << VIRTIO_NET_F_HOST_TSO6
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| 1 << VIRTIO_NET_F_HOST_UFO
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| 1 << VIRTIO_RING_F_EVENT_IDX
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| 1 << VIRTIO_F_VERSION_1;
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if iommu {
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avail_features |= 1u64 << VIRTIO_F_IOMMU_PLATFORM;
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}
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avail_features |= 1 << VIRTIO_NET_F_CTRL_VQ;
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let queue_num = num_queues + 1;
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let mut config = VirtioNetConfig::default();
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if let Some(mac) = guest_mac {
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build_net_config_space(&mut config, mac, num_queues, &mut avail_features);
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} else {
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build_net_config_space_with_mq(&mut config, num_queues, &mut avail_features);
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}
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Ok(Net {
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common: VirtioCommon {
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device_type: VirtioDeviceType::Net as u32,
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avail_features,
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queue_sizes: vec![queue_size; queue_num],
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paused_sync: Some(Arc::new(Barrier::new((num_queues / 2) + 1))),
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min_queues: 2,
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..Default::default()
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},
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id,
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taps,
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config,
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ctrl_queue_epoll_thread: None,
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counters: NetCounters::default(),
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seccomp_action,
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rate_limiter_config,
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})
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}
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|
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/// Create a new virtio network device with the given IP address and
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/// netmask.
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#[allow(clippy::too_many_arguments)]
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pub fn new(
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id: String,
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if_name: Option<&str>,
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ip_addr: Option<Ipv4Addr>,
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netmask: Option<Ipv4Addr>,
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guest_mac: Option<MacAddr>,
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host_mac: &mut Option<MacAddr>,
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iommu: bool,
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num_queues: usize,
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queue_size: u16,
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seccomp_action: SeccompAction,
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rate_limiter_config: Option<RateLimiterConfig>,
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) -> Result<Self> {
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let taps = open_tap(if_name, ip_addr, netmask, host_mac, num_queues / 2, None)
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.map_err(Error::OpenTap)?;
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|
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Self::new_with_tap(
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id,
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taps,
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guest_mac,
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iommu,
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num_queues,
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queue_size,
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seccomp_action,
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rate_limiter_config,
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)
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}
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pub fn from_tap_fds(
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id: String,
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fds: &[RawFd],
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guest_mac: Option<MacAddr>,
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iommu: bool,
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queue_size: u16,
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seccomp_action: SeccompAction,
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rate_limiter_config: Option<RateLimiterConfig>,
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) -> Result<Self> {
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let mut taps: Vec<Tap> = Vec::new();
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let num_queue_pairs = fds.len();
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|
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for fd in fds.iter() {
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// Duplicate so that it can survive reboots
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let fd = unsafe { libc::dup(*fd) };
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if fd < 0 {
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return Err(Error::DuplicateTapFd(std::io::Error::last_os_error()));
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}
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let tap = Tap::from_tap_fd(fd, num_queue_pairs).map_err(Error::TapError)?;
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taps.push(tap);
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}
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|
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Self::new_with_tap(
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id,
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taps,
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|
guest_mac,
|
|
iommu,
|
|
num_queue_pairs * 2,
|
|
queue_size,
|
|
seccomp_action,
|
|
rate_limiter_config,
|
|
)
|
|
}
|
|
|
|
fn state(&self) -> NetState {
|
|
NetState {
|
|
avail_features: self.common.avail_features,
|
|
acked_features: self.common.acked_features,
|
|
config: self.config,
|
|
queue_size: self.common.queue_sizes.clone(),
|
|
}
|
|
}
|
|
|
|
fn set_state(&mut self, state: &NetState) {
|
|
self.common.avail_features = state.avail_features;
|
|
self.common.acked_features = state.acked_features;
|
|
self.config = state.config;
|
|
self.common.queue_sizes = state.queue_size.clone();
|
|
}
|
|
}
|
|
|
|
impl Drop for Net {
|
|
fn drop(&mut self) {
|
|
if let Some(kill_evt) = self.common.kill_evt.take() {
|
|
// Ignore the result because there is nothing we can do about it.
|
|
let _ = kill_evt.write(1);
|
|
}
|
|
}
|
|
}
|
|
|
|
impl VirtioDevice for Net {
|
|
fn device_type(&self) -> u32 {
|
|
self.common.device_type
|
|
}
|
|
|
|
fn queue_max_sizes(&self) -> &[u16] {
|
|
&self.common.queue_sizes
|
|
}
|
|
|
|
fn features(&self) -> u64 {
|
|
self.common.avail_features
|
|
}
|
|
|
|
fn ack_features(&mut self, value: u64) {
|
|
self.common.ack_features(value)
|
|
}
|
|
|
|
fn read_config(&self, offset: u64, data: &mut [u8]) {
|
|
self.read_config_from_slice(self.config.as_slice(), offset, data);
|
|
}
|
|
|
|
fn activate(
|
|
&mut self,
|
|
mem: GuestMemoryAtomic<GuestMemoryMmap>,
|
|
interrupt_cb: Arc<dyn VirtioInterrupt>,
|
|
mut queues: Vec<Queue>,
|
|
mut queue_evts: Vec<EventFd>,
|
|
) -> ActivateResult {
|
|
self.common.activate(&queues, &queue_evts, &interrupt_cb)?;
|
|
|
|
let queue_num = queues.len();
|
|
if self.common.feature_acked(VIRTIO_NET_F_CTRL_VQ.into()) && queue_num % 2 != 0 {
|
|
let cvq_queue = queues.remove(queue_num - 1);
|
|
let cvq_queue_evt = queue_evts.remove(queue_num - 1);
|
|
|
|
let (kill_evt, pause_evt) = self.common.dup_eventfds();
|
|
let mut ctrl_handler = NetCtrlEpollHandler {
|
|
mem: mem.clone(),
|
|
kill_evt,
|
|
pause_evt,
|
|
ctrl_q: CtrlQueue::new(self.taps.clone()),
|
|
queue: cvq_queue,
|
|
queue_evt: cvq_queue_evt,
|
|
};
|
|
|
|
let paused = self.common.paused.clone();
|
|
// Let's update the barrier as we need 1 for each RX/TX pair +
|
|
// 1 for the control queue + 1 for the main thread signalling
|
|
// the pause.
|
|
self.common.paused_sync = Some(Arc::new(Barrier::new(self.taps.len() + 2)));
|
|
let paused_sync = self.common.paused_sync.clone();
|
|
|
|
// Retrieve seccomp filter for virtio_net_ctl thread
|
|
let virtio_net_ctl_seccomp_filter =
|
|
get_seccomp_filter(&self.seccomp_action, Thread::VirtioNetCtl)
|
|
.map_err(ActivateError::CreateSeccompFilter)?;
|
|
thread::Builder::new()
|
|
.name(format!("{}_ctrl", self.id))
|
|
.spawn(move || {
|
|
if let Err(e) = SeccompFilter::apply(virtio_net_ctl_seccomp_filter) {
|
|
error!("Error applying seccomp filter: {:?}", e);
|
|
} else if let Err(e) = ctrl_handler.run_ctrl(paused, paused_sync.unwrap()) {
|
|
error!("Error running worker: {:?}", e);
|
|
}
|
|
})
|
|
.map(|thread| self.ctrl_queue_epoll_thread = Some(thread))
|
|
.map_err(|e| {
|
|
error!("failed to clone queue EventFd: {}", e);
|
|
ActivateError::BadActivate
|
|
})?;
|
|
}
|
|
|
|
let event_idx = self.common.feature_acked(VIRTIO_RING_F_EVENT_IDX.into());
|
|
|
|
let mut epoll_threads = Vec::new();
|
|
let mut taps = self.taps.clone();
|
|
for i in 0..queues.len() / 2 {
|
|
let rx = RxVirtio::new();
|
|
let tx = TxVirtio::new();
|
|
let rx_tap_listening = false;
|
|
|
|
let mut queue_pair = vec![queues.remove(0), queues.remove(0)];
|
|
queue_pair[0].set_event_idx(event_idx);
|
|
queue_pair[1].set_event_idx(event_idx);
|
|
|
|
let queue_evt_pair = vec![queue_evts.remove(0), queue_evts.remove(0)];
|
|
|
|
let (kill_evt, pause_evt) = self.common.dup_eventfds();
|
|
|
|
let rx_rate_limiter: Option<rate_limiter::RateLimiter> = self
|
|
.rate_limiter_config
|
|
.map(RateLimiterConfig::try_into)
|
|
.transpose()
|
|
.map_err(ActivateError::CreateRateLimiter)?;
|
|
|
|
let tx_rate_limiter: Option<rate_limiter::RateLimiter> = self
|
|
.rate_limiter_config
|
|
.map(RateLimiterConfig::try_into)
|
|
.transpose()
|
|
.map_err(ActivateError::CreateRateLimiter)?;
|
|
|
|
let tap = taps.remove(0);
|
|
tap.set_offload(virtio_features_to_tap_offload(self.common.acked_features))
|
|
.map_err(|e| {
|
|
error!("Error programming tap offload: {:?}", e);
|
|
ActivateError::BadActivate
|
|
})?;
|
|
|
|
let mut handler = NetEpollHandler {
|
|
net: NetQueuePair {
|
|
mem: Some(mem.clone()),
|
|
tap,
|
|
rx,
|
|
tx,
|
|
epoll_fd: None,
|
|
rx_tap_listening,
|
|
counters: self.counters.clone(),
|
|
tap_event_id: RX_TAP_EVENT,
|
|
rx_desc_avail: false,
|
|
rx_rate_limiter,
|
|
tx_rate_limiter,
|
|
},
|
|
queue_pair,
|
|
queue_evt_pair,
|
|
interrupt_cb: interrupt_cb.clone(),
|
|
kill_evt,
|
|
pause_evt,
|
|
driver_awake: false,
|
|
};
|
|
|
|
let paused = self.common.paused.clone();
|
|
let paused_sync = self.common.paused_sync.clone();
|
|
// Retrieve seccomp filter for virtio_net thread
|
|
let virtio_net_seccomp_filter =
|
|
get_seccomp_filter(&self.seccomp_action, Thread::VirtioNet)
|
|
.map_err(ActivateError::CreateSeccompFilter)?;
|
|
thread::Builder::new()
|
|
.name(format!("{}_qp{}", self.id.clone(), i))
|
|
.spawn(move || {
|
|
if let Err(e) = SeccompFilter::apply(virtio_net_seccomp_filter) {
|
|
error!("Error applying seccomp filter: {:?}", e);
|
|
} else if let Err(e) = handler.run(paused, paused_sync.unwrap()) {
|
|
error!("Error running worker: {:?}", e);
|
|
}
|
|
})
|
|
.map(|thread| epoll_threads.push(thread))
|
|
.map_err(|e| {
|
|
error!("failed to clone queue EventFd: {}", e);
|
|
ActivateError::BadActivate
|
|
})?;
|
|
}
|
|
|
|
self.common.epoll_threads = Some(epoll_threads);
|
|
|
|
event!("virtio-device", "activated", "id", &self.id);
|
|
Ok(())
|
|
}
|
|
|
|
fn reset(&mut self) -> Option<Arc<dyn VirtioInterrupt>> {
|
|
let result = self.common.reset();
|
|
event!("virtio-device", "reset", "id", &self.id);
|
|
result
|
|
}
|
|
|
|
fn counters(&self) -> Option<HashMap<&'static str, Wrapping<u64>>> {
|
|
let mut counters = HashMap::new();
|
|
|
|
counters.insert(
|
|
"rx_bytes",
|
|
Wrapping(self.counters.rx_bytes.load(Ordering::Acquire)),
|
|
);
|
|
counters.insert(
|
|
"rx_frames",
|
|
Wrapping(self.counters.rx_frames.load(Ordering::Acquire)),
|
|
);
|
|
counters.insert(
|
|
"tx_bytes",
|
|
Wrapping(self.counters.tx_bytes.load(Ordering::Acquire)),
|
|
);
|
|
counters.insert(
|
|
"tx_frames",
|
|
Wrapping(self.counters.tx_frames.load(Ordering::Acquire)),
|
|
);
|
|
|
|
Some(counters)
|
|
}
|
|
}
|
|
|
|
impl Pausable for Net {
|
|
fn pause(&mut self) -> result::Result<(), MigratableError> {
|
|
self.common.pause()
|
|
}
|
|
|
|
fn resume(&mut self) -> result::Result<(), MigratableError> {
|
|
self.common.resume()?;
|
|
|
|
if let Some(ctrl_queue_epoll_thread) = &self.ctrl_queue_epoll_thread {
|
|
ctrl_queue_epoll_thread.thread().unpark();
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl Snapshottable for Net {
|
|
fn id(&self) -> String {
|
|
self.id.clone()
|
|
}
|
|
|
|
fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
|
|
Snapshot::new_from_versioned_state(&self.id, &self.state())
|
|
}
|
|
|
|
fn restore(&mut self, snapshot: Snapshot) -> std::result::Result<(), MigratableError> {
|
|
self.set_state(&snapshot.to_versioned_state(&self.id)?);
|
|
Ok(())
|
|
}
|
|
}
|
|
impl Transportable for Net {}
|
|
impl Migratable for Net {}
|