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virtio-devices: pmem: Port to VirtioCommon for feature handling

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Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-09-03 10:37:36 +01:00 committed by Sebastien Boeuf
parent 37e99bbbb0
commit 84b4aef87a
1 changed files with 12 additions and 20 deletions
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32
virtio-devices/src/pmem.rs
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@ -9,7 +9,7 @@
use super::Error as DeviceError;
use super::{
ActivateError, ActivateResult, DescriptorChain, EpollHelper, EpollHelperError,
EpollHelperHandler, Queue, UserspaceMapping, VirtioDevice, VirtioDeviceType,
EpollHelperHandler, Queue, UserspaceMapping, VirtioCommon, VirtioDevice, VirtioDeviceType,
EPOLL_HELPER_EVENT_LAST, VIRTIO_F_IOMMU_PLATFORM, VIRTIO_F_VERSION_1,
};
use crate::seccomp_filters::{get_seccomp_filter, Thread};
@ -281,12 +281,11 @@ impl EpollHelperHandler for PmemEpollHandler {
}
pub struct Pmem {
common: VirtioCommon,
id: String,
kill_evt: Option<EventFd>,
pause_evt: Option<EventFd>,
disk: Option<File>,
avail_features: u64,
acked_features: u64,
config: VirtioPmemConfig,
queue_evts: Option<Vec<EventFd>>,
interrupt_cb: Option<Arc<dyn VirtioInterrupt>>,
@ -330,12 +329,14 @@ impl Pmem {
}
Ok(Pmem {
common: VirtioCommon {
avail_features,
acked_features: 0u64,
},
id,
kill_evt: None,
pause_evt: None,
disk: Some(disk),
avail_features,
acked_features: 0u64,
config,
queue_evts: None,
interrupt_cb: None,
@ -350,15 +351,15 @@ impl Pmem {
fn state(&self) -> PmemState {
PmemState {
avail_features: self.avail_features,
acked_features: self.acked_features,
avail_features: self.common.avail_features,
acked_features: self.common.acked_features,
config: self.config,
}
}
fn set_state(&mut self, state: &PmemState) -> io::Result<()> {
self.avail_features = state.avail_features;
self.acked_features = state.acked_features;
self.common.avail_features = state.avail_features;
self.common.acked_features = state.acked_features;
self.config = state.config;
Ok(())
@ -384,20 +385,11 @@ impl VirtioDevice for Pmem {
}
fn features(&self) -> u64 {
self.avail_features
self.common.avail_features
}
fn ack_features(&mut self, value: u64) {
let mut v = value;
// Check if the guest is ACK'ing a feature that we didn't claim to have.
let unrequested_features = v & !self.avail_features;
if unrequested_features != 0 {
warn!("Received acknowledge request for unknown feature.");
// Don't count these features as acked.
v &= !unrequested_features;
}
self.acked_features |= v;
self.common.ack_features(value)
}
fn read_config(&self, offset: u64, data: &mut [u8]) {