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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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virtio-devices: vhost_user: Move reconnection code to module
The reconnection code is moved to the vhost-user module as it is a common place to be shared across all vhost-user devices. Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
parent
3e00247a47
commit
b4eb015d86
@ -2,13 +2,21 @@
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// SPDX-License-Identifier: Apache-2.0
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use crate::{
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VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA, VIRTIO_F_ORDER_PLATFORM,
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VIRTIO_F_RING_EVENT_IDX, VIRTIO_F_RING_INDIRECT_DESC, VIRTIO_F_RING_PACKED, VIRTIO_F_VERSION_1,
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EpollHelper, EpollHelperError, EpollHelperHandler, Queue, VirtioInterrupt,
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EPOLL_HELPER_EVENT_LAST, VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA,
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VIRTIO_F_ORDER_PLATFORM, VIRTIO_F_RING_EVENT_IDX, VIRTIO_F_RING_INDIRECT_DESC,
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VIRTIO_F_RING_PACKED, VIRTIO_F_VERSION_1,
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};
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use std::io;
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use std::ops::Deref;
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use std::os::unix::io::AsRawFd;
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use std::sync::{atomic::AtomicBool, Arc, Barrier, Mutex};
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use vhost::vhost_user::message::VhostUserVirtioFeatures;
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use vhost::vhost_user::Master;
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use vhost::Error as VhostError;
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use vm_memory::Error as MmapError;
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use vm_memory::{Error as MmapError, GuestAddressSpace, GuestMemoryAtomic, GuestMemoryMmap};
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use vmm_sys_util::eventfd::EventFd;
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use vu_common_ctrl::{connect_vhost_user, reinitialize_vhost_user};
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pub mod blk;
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pub mod fs;
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@ -114,3 +122,110 @@ pub const DEFAULT_VIRTIO_FEATURES: u64 = 1 << VIRTIO_F_RING_INDIRECT_DESC
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| 1 << VIRTIO_F_ORDER_PLATFORM
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| 1 << VIRTIO_F_NOTIFICATION_DATA
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| VhostUserVirtioFeatures::PROTOCOL_FEATURES.bits();
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const HUP_CONNECTION_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 1;
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pub struct ReconnectEpollHandler {
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pub vu: Arc<Mutex<Master>>,
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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 queues: Vec<Queue>,
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pub queue_evts: Vec<EventFd>,
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pub virtio_interrupt: Arc<dyn VirtioInterrupt>,
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pub acked_features: u64,
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pub acked_protocol_features: u64,
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pub socket_path: String,
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pub server: bool,
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}
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impl ReconnectEpollHandler {
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pub 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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) -> 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_custom(
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self.vu.lock().unwrap().as_raw_fd(),
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HUP_CONNECTION_EVENT,
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epoll::Events::EPOLLHUP,
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)?;
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helper.run(paused, paused_sync, self)?;
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Ok(())
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}
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fn reconnect(&mut self, helper: &mut EpollHelper) -> std::result::Result<(), EpollHelperError> {
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helper.del_event_custom(
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self.vu.lock().unwrap().as_raw_fd(),
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HUP_CONNECTION_EVENT,
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epoll::Events::EPOLLHUP,
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)?;
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let mut vhost_user = connect_vhost_user(
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self.server,
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&self.socket_path,
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self.queues.len() as u64,
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true,
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)
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.map_err(|e| {
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EpollHelperError::IoError(std::io::Error::new(
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std::io::ErrorKind::Other,
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format!("failed connecting vhost-user backend{:?}", e),
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))
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})?;
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// Initialize the backend
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reinitialize_vhost_user(
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&mut vhost_user,
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self.mem.memory().deref(),
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self.queues.clone(),
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self.queue_evts
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.iter()
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.map(|q| q.try_clone().unwrap())
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.collect(),
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&self.virtio_interrupt,
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self.acked_features,
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self.acked_protocol_features,
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)
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.map_err(|e| {
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EpollHelperError::IoError(std::io::Error::new(
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std::io::ErrorKind::Other,
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format!("failed reconnecting vhost-user backend{:?}", e),
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))
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})?;
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helper.add_event_custom(
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vhost_user.as_raw_fd(),
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HUP_CONNECTION_EVENT,
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epoll::Events::EPOLLHUP,
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)?;
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// Update vhost-user reference
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let mut vu = self.vu.lock().unwrap();
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*vu = vhost_user;
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Ok(())
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}
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}
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impl EpollHelperHandler for ReconnectEpollHandler {
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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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HUP_CONNECTION_EVENT => {
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if let Err(e) = self.reconnect(helper) {
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error!("failed to reconnect vhost-user backend: {:?}", 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 vhost-user reconnection thread");
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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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@ -1,17 +1,17 @@
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// Copyright 2019 Intel Corporation. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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use super::super::{
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ActivateError, ActivateResult, EpollHelper, EpollHelperError, EpollHelperHandler, Queue,
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VirtioCommon, VirtioDevice, VirtioDeviceType, EPOLL_HELPER_EVENT_LAST,
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};
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use super::vu_common_ctrl::{
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add_memory_region, connect_vhost_user, negotiate_features_vhost_user, reinitialize_vhost_user,
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reset_vhost_user, setup_vhost_user, update_mem_table, VhostUserConfig,
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};
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use super::{Error, Result};
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use crate::seccomp_filters::{get_seccomp_filter, Thread};
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use crate::{VirtioInterrupt, VIRTIO_F_RING_EVENT_IDX, VIRTIO_F_VERSION_1};
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use crate::vhost_user::vu_common_ctrl::{
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add_memory_region, connect_vhost_user, negotiate_features_vhost_user, reset_vhost_user,
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setup_vhost_user, update_mem_table, VhostUserConfig,
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};
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use crate::vhost_user::{Error, ReconnectEpollHandler, Result};
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use crate::{
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ActivateError, ActivateResult, EpollHelper, EpollHelperError, EpollHelperHandler, Queue,
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VirtioCommon, VirtioDevice, VirtioDeviceType, VirtioInterrupt, EPOLL_HELPER_EVENT_LAST,
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VIRTIO_F_RING_EVENT_IDX, VIRTIO_F_VERSION_1,
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};
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use net_util::{build_net_config_space, CtrlQueue, MacAddr, VirtioNetConfig};
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use seccomp::{SeccompAction, SeccompFilter};
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use std::ops::Deref;
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@ -92,115 +92,6 @@ impl EpollHelperHandler for NetCtrlEpollHandler {
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}
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}
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/// Reconnection thread
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// Event meaning the connection was closed.
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const HUP_CONNECTION_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 1;
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pub struct ReconnectEpollHandler {
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pub vu: Arc<Mutex<Master>>,
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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 queues: Vec<Queue>,
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pub queue_evts: Vec<EventFd>,
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pub virtio_interrupt: Arc<dyn VirtioInterrupt>,
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pub acked_features: u64,
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pub acked_protocol_features: u64,
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pub socket_path: String,
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pub server: bool,
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}
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impl ReconnectEpollHandler {
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pub 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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) -> 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_custom(
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self.vu.lock().unwrap().as_raw_fd(),
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HUP_CONNECTION_EVENT,
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epoll::Events::EPOLLHUP,
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)?;
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helper.run(paused, paused_sync, self)?;
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Ok(())
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}
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fn reconnect(&mut self, helper: &mut EpollHelper) -> std::result::Result<(), EpollHelperError> {
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helper.del_event_custom(
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self.vu.lock().unwrap().as_raw_fd(),
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HUP_CONNECTION_EVENT,
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epoll::Events::EPOLLHUP,
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)?;
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let mut vhost_user_net = connect_vhost_user(
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self.server,
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&self.socket_path,
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self.queues.len() as u64,
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true,
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)
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.map_err(|e| {
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EpollHelperError::IoError(std::io::Error::new(
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std::io::ErrorKind::Other,
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format!("failed connecting vhost-user backend{:?}", e),
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))
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})?;
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// Initialize the backend
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reinitialize_vhost_user(
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&mut vhost_user_net,
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self.mem.memory().deref(),
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self.queues.clone(),
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self.queue_evts
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.iter()
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.map(|q| q.try_clone().unwrap())
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.collect(),
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&self.virtio_interrupt,
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self.acked_features,
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self.acked_protocol_features,
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)
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.map_err(|e| {
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EpollHelperError::IoError(std::io::Error::new(
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std::io::ErrorKind::Other,
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format!("failed reconnecting vhost-user backend{:?}", e),
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))
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})?;
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helper.add_event_custom(
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vhost_user_net.as_raw_fd(),
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HUP_CONNECTION_EVENT,
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epoll::Events::EPOLLHUP,
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)?;
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// Update vhost-user reference
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let mut vu = self.vu.lock().unwrap();
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*vu = vhost_user_net;
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Ok(())
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}
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}
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impl EpollHelperHandler for ReconnectEpollHandler {
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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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HUP_CONNECTION_EVENT => {
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if let Err(e) = self.reconnect(helper) {
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error!("failed to reconnect vhost-user-net backend: {:?}", 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 vhost-user-net reconnection thread");
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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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