diff options
Diffstat (limited to 'drivers/net/virtio_net.c')
| -rw-r--r-- | drivers/net/virtio_net.c | 47 |
1 files changed, 42 insertions, 5 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index cecfd77c9f3c..023725086046 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -236,6 +236,7 @@ struct virtnet_info { u32 speed; unsigned long guest_offloads; + unsigned long guest_offloads_capable; /* failover when STANDBY feature enabled */ struct failover *failover; @@ -365,7 +366,8 @@ static unsigned int mergeable_ctx_to_truesize(void *mrg_ctx) static struct sk_buff *page_to_skb(struct virtnet_info *vi, struct receive_queue *rq, struct page *page, unsigned int offset, - unsigned int len, unsigned int truesize) + unsigned int len, unsigned int truesize, + bool hdr_valid) { struct sk_buff *skb; struct virtio_net_hdr_mrg_rxbuf *hdr; @@ -387,7 +389,8 @@ static struct sk_buff *page_to_skb(struct virtnet_info *vi, else hdr_padded_len = sizeof(struct padded_vnet_hdr); - memcpy(hdr, p, hdr_len); + if (hdr_valid) + memcpy(hdr, p, hdr_len); len -= hdr_len; offset += hdr_padded_len; @@ -739,7 +742,8 @@ static struct sk_buff *receive_big(struct net_device *dev, struct virtnet_rq_stats *stats) { struct page *page = buf; - struct sk_buff *skb = page_to_skb(vi, rq, page, 0, len, PAGE_SIZE); + struct sk_buff *skb = page_to_skb(vi, rq, page, 0, len, + PAGE_SIZE, true); stats->bytes += len - vi->hdr_len; if (unlikely(!skb)) @@ -842,7 +846,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, rcu_read_unlock(); put_page(page); head_skb = page_to_skb(vi, rq, xdp_page, - offset, len, PAGE_SIZE); + offset, len, + PAGE_SIZE, false); return head_skb; } break; @@ -898,7 +903,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, goto err_skb; } - head_skb = page_to_skb(vi, rq, page, offset, len, truesize); + head_skb = page_to_skb(vi, rq, page, offset, len, truesize, !xdp_prog); curr_skb = head_skb; if (unlikely(!curr_skb)) @@ -2475,6 +2480,31 @@ static int virtnet_get_phys_port_name(struct net_device *dev, char *buf, return 0; } +static int virtnet_set_features(struct net_device *dev, + netdev_features_t features) +{ + struct virtnet_info *vi = netdev_priv(dev); + u64 offloads; + int err; + + if ((dev->features ^ features) & NETIF_F_LRO) { + if (vi->xdp_queue_pairs) + return -EBUSY; + + if (features & NETIF_F_LRO) + offloads = vi->guest_offloads_capable; + else + offloads = 0; + + err = virtnet_set_guest_offloads(vi, offloads); + if (err) + return err; + vi->guest_offloads = offloads; + } + + return 0; +} + static const struct net_device_ops virtnet_netdev = { .ndo_open = virtnet_open, .ndo_stop = virtnet_close, @@ -2489,6 +2519,7 @@ static const struct net_device_ops virtnet_netdev = { .ndo_xdp_xmit = virtnet_xdp_xmit, .ndo_features_check = passthru_features_check, .ndo_get_phys_port_name = virtnet_get_phys_port_name, + .ndo_set_features = virtnet_set_features, }; static void virtnet_config_changed_work(struct work_struct *work) @@ -2947,6 +2978,11 @@ static int virtnet_probe(struct virtio_device *vdev) } if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM)) dev->features |= NETIF_F_RXCSUM; + if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) || + virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6)) + dev->features |= NETIF_F_LRO; + if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) + dev->hw_features |= NETIF_F_LRO; dev->vlan_features = dev->features; @@ -3076,6 +3112,7 @@ static int virtnet_probe(struct virtio_device *vdev) for (i = 0; i < ARRAY_SIZE(guest_offloads); i++) if (virtio_has_feature(vi->vdev, guest_offloads[i])) set_bit(guest_offloads[i], &vi->guest_offloads); + vi->guest_offloads_capable = vi->guest_offloads; pr_debug("virtnet: registered device %s with %d RX and TX vq's\n", dev->name, max_queue_pairs); |