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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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virtio-devices: rng: Port to VirtioCommon for feature handling
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
parent
edb7ac5922
commit
37e99bbbb0
@ -5,7 +5,7 @@
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use super::Error as DeviceError;
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use super::Error as DeviceError;
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use super::{
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use super::{
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ActivateError, ActivateResult, EpollHelper, EpollHelperError, EpollHelperHandler, Queue,
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ActivateError, ActivateResult, EpollHelper, EpollHelperError, EpollHelperHandler, Queue,
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VirtioDevice, VirtioDeviceType, EPOLL_HELPER_EVENT_LAST, VIRTIO_F_IOMMU_PLATFORM,
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VirtioCommon, VirtioDevice, VirtioDeviceType, EPOLL_HELPER_EVENT_LAST, VIRTIO_F_IOMMU_PLATFORM,
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VIRTIO_F_VERSION_1,
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VIRTIO_F_VERSION_1,
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};
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};
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use crate::seccomp_filters::{get_seccomp_filter, Thread};
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use crate::seccomp_filters::{get_seccomp_filter, Thread};
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@ -127,12 +127,11 @@ impl EpollHelperHandler for RngEpollHandler {
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/// Virtio device for exposing entropy to the guest OS through virtio.
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/// Virtio device for exposing entropy to the guest OS through virtio.
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pub struct Rng {
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pub struct Rng {
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common: VirtioCommon,
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id: String,
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id: String,
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kill_evt: Option<EventFd>,
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kill_evt: Option<EventFd>,
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pause_evt: Option<EventFd>,
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pause_evt: Option<EventFd>,
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random_file: Option<File>,
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random_file: Option<File>,
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avail_features: u64,
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acked_features: u64,
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queue_evts: Option<Vec<EventFd>>,
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queue_evts: Option<Vec<EventFd>>,
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interrupt_cb: Option<Arc<dyn VirtioInterrupt>>,
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interrupt_cb: Option<Arc<dyn VirtioInterrupt>>,
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epoll_threads: Option<Vec<thread::JoinHandle<()>>>,
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epoll_threads: Option<Vec<thread::JoinHandle<()>>>,
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@ -164,12 +163,14 @@ impl Rng {
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}
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}
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Ok(Rng {
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Ok(Rng {
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common: VirtioCommon {
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avail_features,
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acked_features: 0u64,
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},
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id,
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id,
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kill_evt: None,
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kill_evt: None,
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pause_evt: None,
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pause_evt: None,
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random_file: Some(random_file),
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random_file: Some(random_file),
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avail_features,
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acked_features: 0u64,
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queue_evts: None,
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queue_evts: None,
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interrupt_cb: None,
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interrupt_cb: None,
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epoll_threads: None,
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epoll_threads: None,
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@ -181,15 +182,15 @@ impl Rng {
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fn state(&self) -> RngState {
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fn state(&self) -> RngState {
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RngState {
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RngState {
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avail_features: self.avail_features,
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avail_features: self.common.avail_features,
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acked_features: self.acked_features,
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acked_features: self.common.acked_features,
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paused: self.paused.clone(),
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paused: self.paused.clone(),
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}
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}
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}
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}
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fn set_state(&mut self, state: &RngState) -> io::Result<()> {
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fn set_state(&mut self, state: &RngState) -> io::Result<()> {
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self.avail_features = state.avail_features;
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self.common.avail_features = state.avail_features;
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self.acked_features = state.acked_features;
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self.common.acked_features = state.acked_features;
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self.paused = state.paused.clone();
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self.paused = state.paused.clone();
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Ok(())
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Ok(())
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@ -215,20 +216,11 @@ impl VirtioDevice for Rng {
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}
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}
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fn features(&self) -> u64 {
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fn features(&self) -> u64 {
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self.avail_features
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self.common.avail_features
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}
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}
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fn ack_features(&mut self, value: u64) {
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fn ack_features(&mut self, value: u64) {
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let mut v = value;
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self.common.ack_features(value)
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// Check if the guest is ACK'ing a feature that we didn't claim to have.
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let unrequested_features = v & !self.avail_features;
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if unrequested_features != 0 {
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warn!("Received acknowledge request for unknown feature.");
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// Don't count these features as acked.
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v &= !unrequested_features;
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}
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self.acked_features |= v;
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}
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}
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fn activate(
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fn activate(
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