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virtio: fix ip4 checksum offload

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Type: fix

Change-Id: I08747ac308e5c1768a3a6aa5f83a016dc0274a1c
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
This commit is contained in:
Mohsin Kazmi
2019-12-26 20:42:18 +01:00
committed by Andrew Yourtchenko
parent ba0061feba
commit affc5f6d3d
1 changed files with 14 additions and 2 deletions
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16
src/vnet/devices/virtio/vhost_user_output.c
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@@ -44,6 +44,7 @@
#include <vnet/devices/virtio/vhost_user.h> #include <vnet/devices/virtio/vhost_user.h>
#include <vnet/devices/virtio/vhost_user_inline.h> #include <vnet/devices/virtio/vhost_user_inline.h>
#include <vnet/gso/gso.h>
/* /*
* On the transmit side, we keep processing the buffers from vlib in the while * On the transmit side, we keep processing the buffers from vlib in the while
* loop and prepare the copy order to be executed later. However, the static * loop and prepare the copy order to be executed later. However, the static
@@ -235,17 +236,28 @@ static_always_inline void
vhost_user_handle_tx_offload (vhost_user_intf_t * vui, vlib_buffer_t * b, vhost_user_handle_tx_offload (vhost_user_intf_t * vui, vlib_buffer_t * b,
virtio_net_hdr_t * hdr) virtio_net_hdr_t * hdr)
{ {
gso_header_offset_t gho =
vnet_gso_header_offset_parser (b, b->flags & VNET_BUFFER_F_IS_IP6);
if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
{
ip4_header_t *ip4;
ip4 =
(ip4_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset);
ip4->checksum = ip4_header_checksum (ip4);
}
/* checksum offload */ /* checksum offload */
if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
{ {
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = vnet_buffer (b)->l4_hdr_offset; hdr->csum_start = gho.l4_hdr_offset;
hdr->csum_offset = offsetof (udp_header_t, checksum); hdr->csum_offset = offsetof (udp_header_t, checksum);
} }
else if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) else if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{ {
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = vnet_buffer (b)->l4_hdr_offset; hdr->csum_start = gho.l4_hdr_offset;
hdr->csum_offset = offsetof (tcp_header_t, checksum); hdr->csum_offset = offsetof (tcp_header_t, checksum);
} }