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authorMohsin Kazmi <sykazmi@cisco.com>2019-12-06 15:47:48 +0100
committerAndrew Yourtchenko <ayourtch@gmail.com>2019-12-06 17:22:32 +0000
commit157a4ab4043cd9d1b6ac26b7853f1471a9095756 (patch)
treef36d68b2f1a3b85704cd241131f3153a8e1492e4 /src/vnet/devices/virtio
parentb0384230d95d9de5e5fec0a311b8644c99f85c31 (diff)
gso: fix the tap/virtio driver for header offset
Type: fix Change-Id: Ied34466907fa8ad44f997c600dbf481be4d22027 Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src/vnet/devices/virtio')
-rw-r--r--src/vnet/devices/virtio/node.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/src/vnet/devices/virtio/node.c b/src/vnet/devices/virtio/node.c
index fc2317ecc69..e9c72ebdaa1 100644
--- a/src/vnet/devices/virtio/node.c
+++ b/src/vnet/devices/virtio/node.c
@@ -145,6 +145,7 @@ 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)
{
@@ -167,29 +168,50 @@ fill_gso_buffer_flags (vlib_buffer_t * b0, struct virtio_net_hdr_v1 *hdr)
}
}
+ 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 *) (vlib_buffer_get_current (b0) + 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_OFFLOAD_IP_CKSUM);
+ b0->flags |=
+ (VNET_BUFFER_F_L2_HDR_OFFSET_VALID
+ | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
}
else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
{
ip6_header_t *ip6 =
(ip6_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
+ vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + sizeof (ip6_header_t);
/* FIXME IPv6 EH traversal */
l4_proto = ip6->protocol;
- b0->flags |= VNET_BUFFER_F_IS_IP6;
+ 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);
}
if (l4_proto == IP_PROTOCOL_TCP)
{
b0->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+ tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b0) +
+ 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 *) (vlib_buffer_get_current (b0) +
+ vnet_buffer
+ (b0)->l4_hdr_offset);
+ l4_hdr_sz = sizeof (*udp);
+ udp->checksum = 0;
}
}
@@ -197,12 +219,14 @@ fill_gso_buffer_flags (vlib_buffer_t * b0, struct virtio_net_hdr_v1 *hdr)
{
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 | 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 | VNET_BUFFER_F_IS_IP6;
}
}