diff options
| author |   Vladimir Isaev <visaev@netgate.com> | 2020-05-21 16:34:17 +0300 |
|---|---|---|
| committer |   John Lo <loj@cisco.com> | 2020-06-08 14:17:59 +0000 |
| commit | 698eb87a8eed847fe555ef327bcc99a4467ed59a (patch) | |
| tree | 102c29c5d96a23a3e185e4d2d765f763445e8076 /src/vnet/pg/input.c | |
| parent | e3621518046ad7f37ccf77c549a93375ab89da19 (diff) | |
vxlan: Fixed checksum caclculation offset
VXLAN uses csum_offload for IPv6 packets.
But without gso node we have csum calculated only for inner
packet.
This patch adds support for outer header csum calculation.
Checksum for inner packet should be calculated before
interface-output node (for example in vxlan node).
Type: fix
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Signed-off-by: Vladimir Isaev <visaev@netgate.com>
Change-Id: Ica68429ede4426293769207cd83c791ebe72fe56
Diffstat (limited to 'src/vnet/pg/input.c')
| -rw-r--r-- | src/vnet/pg/input.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/src/vnet/pg/input.c b/src/vnet/pg/input.c index 8ba3b361894..483add0b5f3 100644 --- a/src/vnet/pg/input.c +++ b/src/vnet/pg/input.c @@ -1530,10 +1530,9 @@ pg_input_trace (pg_main_t * pg, } static_always_inline void -fill_gso_buffer_flags (vlib_main_t * vm, u32 * buffers, u32 n_buffers, - u32 packet_data_size) +fill_buffer_offload_flags (vlib_main_t * vm, u32 * buffers, u32 n_buffers, + int gso_enabled, u32 gso_size) { - for (int i = 0; i < n_buffers; i++) { vlib_buffer_t *b0 = vlib_get_buffer (vm, buffers[i]); @@ -1586,16 +1585,21 @@ fill_gso_buffer_flags (vlib_main_t * vm, u32 * buffers, u32 n_buffers, 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 | VNET_BUFFER_F_GSO); + 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; - vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz; - vnet_buffer2 (b0)->gso_size = packet_data_size; + if (gso_enabled) + { + b0->flags |= VNET_BUFFER_F_GSO; + l4_hdr_sz = tcp_header_bytes (tcp); + vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz; + vnet_buffer2 (b0)->gso_size = gso_size; + } } else if (l4_proto == IP_PROTOCOL_UDP) { @@ -1603,7 +1607,6 @@ fill_gso_buffer_flags (vlib_main_t * vm, u32 * buffers, u32 n_buffers, udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b0) + vnet_buffer (b0)->l4_hdr_offset); - vnet_buffer2 (b0)->gso_l4_hdr_sz = sizeof (*udp); udp->checksum = 0; } } @@ -1700,8 +1703,14 @@ pg_generate_packets (vlib_node_runtime_t * node, vnet_buffer (b)->feature_arc_index = feature_arc_index; } - if (pi->gso_enabled) - fill_gso_buffer_flags (vm, to_next, n_this_frame, pi->gso_size); + if (pi->gso_enabled || + (s->buffer_flags & (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | + VNET_BUFFER_F_OFFLOAD_UDP_CKSUM | + VNET_BUFFER_F_OFFLOAD_IP_CKSUM))) + { + fill_buffer_offload_flags (vm, to_next, n_this_frame, + pi->gso_enabled, pi->gso_size); + } n_trace = vlib_get_trace_count (vm, node); if (n_trace > 0) |