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vmm: add configuration for network offloading features

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Add new configuration for offloading features, including
Checksum/TSO/UFO, and set these offloading features as
enabled by default.

Fixes: #4792.

Signed-off-by: Yong He <alexyonghe@tencent.com>
This commit is contained in:
Yong He
2022-12-20 20:04:08 +08:00
committed by Rob Bradford
parent 06e583c9ab
commit 3494080e2f
6 changed files with 130 additions and 26 deletions
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33
virtio-devices/src/vhost_user/net.rs
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@@ -78,6 +78,9 @@ impl Net {
exit_evt: EventFd,
iommu: bool,
state: Option<State>,
offload_tso: bool,
offload_ufo: bool,
offload_csum: bool,
) -> Result<Net> {
let mut num_queues = vu_cfg.num_queues;
@@ -120,17 +123,7 @@ impl Net {
)
} else {
// Filling device and vring features VMM supports.
let mut avail_features = 1 << VIRTIO_NET_F_CSUM
| 1 << VIRTIO_NET_F_GUEST_CSUM
| 1 << VIRTIO_NET_F_GUEST_TSO4
| 1 << VIRTIO_NET_F_GUEST_TSO6
| 1 << VIRTIO_NET_F_GUEST_ECN
| 1 << VIRTIO_NET_F_GUEST_UFO
| 1 << VIRTIO_NET_F_HOST_TSO4
| 1 << VIRTIO_NET_F_HOST_TSO6
| 1 << VIRTIO_NET_F_HOST_ECN
| 1 << VIRTIO_NET_F_HOST_UFO
| 1 << VIRTIO_NET_F_MRG_RXBUF
let mut avail_features = 1 << VIRTIO_NET_F_MRG_RXBUF
| 1 << VIRTIO_NET_F_CTRL_VQ
| 1 << VIRTIO_F_RING_EVENT_IDX
| 1 << VIRTIO_F_VERSION_1
@@ -140,6 +133,24 @@ impl Net {
avail_features |= 1u64 << VIRTIO_NET_F_MTU;
}
// Configure TSO/UFO features when hardware checksum offload is enabled.
if offload_csum {
avail_features |= 1 << VIRTIO_NET_F_CSUM | 1 << VIRTIO_NET_F_GUEST_CSUM;
if offload_tso {
avail_features |= 1 << VIRTIO_NET_F_HOST_ECN
| 1 << VIRTIO_NET_F_HOST_TSO4
| 1 << VIRTIO_NET_F_HOST_TSO6
| 1 << VIRTIO_NET_F_GUEST_ECN
| 1 << VIRTIO_NET_F_GUEST_TSO4
| 1 << VIRTIO_NET_F_GUEST_TSO6;
}
if offload_ufo {
avail_features |= 1 << VIRTIO_NET_F_HOST_UFO | 1 << VIRTIO_NET_F_GUEST_UFO;
}
}
let mut config = VirtioNetConfig::default();
build_net_config_space(&mut config, mac_addr, num_queues, mtu, &mut avail_features);