The virtio specification defines a device can be reset, which was not
supported by this vhost-user-net implementation. The reason it is needed
is to support unbinding this device from the guest driver, and rebind it
to vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
While implement vhost-user-net backend with Tap interface, it keeps
failed to enable the tx vring, since there is a checking in
slave_req_handler.rs to require acked_protocol_features to be setup
as a pre-requirement, which is filled by set_protocol_features call.
Add this call in vhost-user-net device implementation to address the issue.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Now that virtio-bindings is a crate part of the rust-vmm project, we
want to rely on this one instead of the local one we had so far.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Regarding vhost-user-net, there are features in avail_features
and acked_features, like VIRTIO_NET_F_MAC which is required by
driver and device to transfer mac address through config space,
but not needed by backend, like ovs+dpdk, so it's necessary to
adjust backend_features based on acked_features before calling
set_features() API.
This fix is to record backend_features in vhost-user-net to avoid
requesting it twice.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
The available features are masked with the backend features, therefore
the available features should be the one used when calling into
set_features() API.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to factorize the code between vhost-user-net and virtio-fs one
step further, this patch extends the vhost-user handler implementation
to support slave requests.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
vhost-user framwork could provide good performance in data intensive
scenario due to the memory sharing mechanism. Implement vhost-user-net
device to get the benefit for Rust-based VMMs network.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
