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Diffstat (limited to 'src/vnet/devices/virtio/node.c')
-rw-r--r--src/vnet/devices/virtio/node.c92
1 files changed, 89 insertions, 3 deletions
diff --git a/src/vnet/devices/virtio/node.c b/src/vnet/devices/virtio/node.c
index 6b82c418ffb..fcc0f8a212a 100644
--- a/src/vnet/devices/virtio/node.c
+++ b/src/vnet/devices/virtio/node.c
@@ -30,6 +30,7 @@
#include <vnet/feature/feature.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
+#include <vnet/udp/udp_packet.h>
#include <vnet/devices/virtio/virtio.h>
@@ -140,9 +141,86 @@ more:
goto more;
}
+static_always_inline void
+fill_gso_buffer_flags (vlib_buffer_t * b0, struct virtio_net_hdr_v1 *hdr)
+{
+ u8 l4_proto = 0;
+ u8 l4_hdr_sz = 0;
+ if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
+
+ {
+ ethernet_header_t *eh = (ethernet_header_t *) b0->data;
+ u16 ethertype = clib_net_to_host_u16 (eh->type);
+ u16 l2hdr_sz = sizeof (ethernet_header_t);
+
+ vnet_buffer (b0)->l2_hdr_offset = 0;
+ vnet_buffer (b0)->l3_hdr_offset = l2hdr_sz;
+ if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
+ {
+ ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l2hdr_sz);
+ vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4);
+ l4_proto = ip4->protocol;
+ b0->flags |=
+ (VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID
+ | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
+ b0->flags |= VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+ }
+ else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
+ {
+ ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l2hdr_sz);
+ /* FIXME IPv6 EH traversal */
+ vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + sizeof (ip6_header_t);
+ l4_proto = ip6->protocol;
+ b0->flags |=
+ (VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID
+ | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
+ b0->flags |= VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+ }
+ if (l4_proto == IP_PROTOCOL_TCP)
+ {
+ b0->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+ tcp_header_t *tcp = (tcp_header_t *) (b0->data +
+ vnet_buffer
+ (b0)->l4_hdr_offset);
+ l4_hdr_sz = tcp_header_bytes (tcp);
+ tcp->checksum = 0;
+ }
+ else if (l4_proto == IP_PROTOCOL_UDP)
+ {
+ b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+ udp_header_t *udp = (udp_header_t *) (b0->data +
+ vnet_buffer
+ (b0)->l4_hdr_offset);
+ l4_hdr_sz = sizeof (*udp);
+ udp->checksum = 0;
+ }
+ }
+
+ if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV4)
+ {
+ ASSERT (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM);
+ vnet_buffer2 (b0)->gso_size = hdr->gso_size;
+ vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
+ b0->flags |= VNET_BUFFER_F_GSO;
+ b0->flags |= VNET_BUFFER_F_IS_IP4;
+ }
+ if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV6)
+ {
+ ASSERT (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM);
+ vnet_buffer2 (b0)->gso_size = hdr->gso_size;
+ vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
+ b0->flags |= VNET_BUFFER_F_GSO;
+ b0->flags |= VNET_BUFFER_F_IS_IP6;
+ }
+}
+
+
static_always_inline uword
virtio_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame, virtio_if_t * vif, u16 qid)
+ vlib_frame_t * frame, virtio_if_t * vif, u16 qid,
+ int gso_enabled)
{
vnet_main_t *vnm = vnet_get_main ();
u32 thread_index = vm->thread_index;
@@ -187,6 +265,10 @@ virtio_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
b0->current_length = len;
b0->total_length_not_including_first_buffer = 0;
b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+ if (gso_enabled)
+ fill_gso_buffer_flags (b0, hdr);
+
vnet_buffer (b0)->sw_if_index[VLIB_RX] = vif->sw_if_index;
vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
@@ -286,8 +368,12 @@ virtio_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
mif = vec_elt_at_index (nm->interfaces, dq->dev_instance);
if (mif->flags & VIRTIO_IF_FLAG_ADMIN_UP)
{
- n_rx += virtio_device_input_inline (vm, node, frame, mif,
- dq->queue_id);
+ if (mif->gso_enabled)
+ n_rx += virtio_device_input_inline (vm, node, frame, mif,
+ dq->queue_id, 1);
+ else
+ n_rx += virtio_device_input_inline (vm, node, frame, mif,
+ dq->queue_id, 0);
}
}