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authorMohsin Kazmi <sykazmi@cisco.com>2019-12-26 20:42:18 +0100
committerAndrew Yourtchenko <ayourtch@gmail.com>2020-01-08 17:09:45 +0000
commitaffc5f6d3d3c17eb8ae1cf7b04a1a1e638516ca4 (patch)
treef0a0558789c98da04a531caeea302d12e8d3098f /src
parentba0061feba13a11fc1c1af551bc4c26eccbd2f2c (diff)
virtio: fix ip4 checksum offload
Type: fix Change-Id: I08747ac308e5c1768a3a6aa5f83a016dc0274a1c Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src')
-rw-r--r--src/vnet/devices/virtio/vhost_user_output.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/src/vnet/devices/virtio/vhost_user_output.c b/src/vnet/devices/virtio/vhost_user_output.c
index 5bd60d4e96e..a47583d64fa 100644
--- a/src/vnet/devices/virtio/vhost_user_output.c
+++ b/src/vnet/devices/virtio/vhost_user_output.c
@@ -44,6 +44,7 @@
#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);
}