virtio: fix ip4 checksum offload
Type: fix
#include <vnet/devices/virtio/vhost_user.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
* 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,
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 */
if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
{
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);
}
else if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
{
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);
}
