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virtio-devices: vhost_user: Set features once acknowledged by guest

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Make sure the virtio features are set upon device activation. At the
time the device is activated, we know the guest acknowledged the
features, which mean it's safe to set them back to the backend.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2021-05-20 23:43:40 +02:00
parent 8c73af048a
commit cdaa4d3ad7
4 changed files with 10 additions and 0 deletions
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2
virtio-devices/src/vhost_user/blk.rs
View File

@ -233,6 +233,8 @@ impl VirtioDevice for Blk {
queues,
queue_evts,
&interrupt_cb,
self.common.acked_features
| (self.common.avail_features & VhostUserVirtioFeatures::PROTOCOL_FEATURES.bits()),
)
.map_err(ActivateError::VhostUserBlkSetup)?;

2
virtio-devices/src/vhost_user/fs.rs
View File

@ -474,6 +474,8 @@ impl VirtioDevice for Fs {
queues,
queue_evts,
&interrupt_cb,
self.common.acked_features
| (self.common.avail_features & VhostUserVirtioFeatures::PROTOCOL_FEATURES.bits()),
)
.map_err(ActivateError::VhostUserFsSetup)?;

2
virtio-devices/src/vhost_user/net.rs
View File

@ -226,6 +226,8 @@ impl VirtioDevice for Net {
queues,
queue_evts,
&interrupt_cb,
self.common.acked_features
| (self.common.avail_features & VhostUserVirtioFeatures::PROTOCOL_FEATURES.bits()),
)
.map_err(ActivateError::VhostUserNetSetup)?;

4
virtio-devices/src/vhost_user/vu_common_ctrl.rs
View File

@ -74,7 +74,11 @@ pub fn setup_vhost_user(
queues: Vec<Queue>,
queue_evts: Vec<EventFd>,
virtio_interrupt: &Arc<dyn VirtioInterrupt>,
acked_features: u64,
) -> Result<()> {
vu.set_features(acked_features)
.map_err(Error::VhostUserSetFeatures)?;
// Let's first provide the memory table to the backend.
update_mem_table(vu, mem)?;