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virtio: fix the tcp/udp checksum offloads

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Some vhost-backend calculates the wrong checksum in
case of tcp/udp offload when driver resets tcp/udp
checksum field to '0'.

Type: fix

Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: I3c45df487f00d7e3d949b4efb32d7f7e01d1108b
This commit is contained in:
Steven Luong
2020-10-12 12:27:25 -07:00
parent 37e99c22df
commit 2a33546579
1 changed files with 1 additions and 5 deletions
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6
src/vnet/devices/virtio/vhost_user_input.c
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@@ -296,15 +296,11 @@ vhost_user_handle_rx_offload (vlib_buffer_t * b0, u8 * b0_data,
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;
b0->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
}
else if (l4_proto == IP_PROTOCOL_UDP)
{
udp_header_t *udp =
(udp_header_t *) (b0_data + vnet_buffer (b0)->l4_hdr_offset);
l4_hdr_sz = sizeof (*udp);
udp->checksum = 0;
l4_hdr_sz = sizeof (udp_header_t);
b0->flags |= VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
}
}