+
/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/vxlan/vxlan.h>
+#include <vnet/qos/qos_types.h>
+#include <vnet/adj/rewrite.h>
/* Statistics (not all errors) */
#define foreach_vxlan_encap_error \
return s;
}
-
-#define foreach_fixed_header4_offset \
- _(0) _(1) _(2) _(3)
-
-#define foreach_fixed_header6_offset \
- _(0) _(1) _(2) _(3) _(4) _(5) _(6)
-
always_inline uword
vxlan_encap_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame,
- u32 is_ip4)
+ u8 is_ip4, u8 csum_offload)
{
u32 n_left_from, next_index, * from, * to_next;
vxlan_main_t * vxm = &vxlan_main;
vnet_main_t * vnm = vxm->vnet_main;
vnet_interface_main_t * im = &vnm->interface_main;
+ vlib_combined_counter_main_t * tx_counter =
+ im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
u32 pkts_encapsulated = 0;
- u16 old_l0 = 0, old_l1 = 0;
u32 thread_index = vlib_get_thread_index();
- u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
u32 sw_if_index0 = 0, sw_if_index1 = 0;
u32 next0 = 0, next1 = 0;
- vnet_hw_interface_t * hi0, * hi1;
vxlan_tunnel_t * t0 = NULL, * t1 = NULL;
+ index_t dpoi_idx0 = INDEX_INVALID, dpoi_idx1 = INDEX_INVALID;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
next_index = node->cached_next_index;
- stats_sw_if_index = node->runtime_data[0];
- stats_n_packets = stats_n_bytes = 0;
+
+ STATIC_ASSERT_SIZEOF(ip6_vxlan_header_t, 56);
+ STATIC_ASSERT_SIZEOF(ip4_vxlan_header_t, 36);
+
+ u8 const underlay_hdr_len = is_ip4 ?
+ sizeof(ip4_vxlan_header_t) : sizeof(ip6_vxlan_header_t);
+ u8 const rw_hdr_offset = sizeof t0->rewrite_data - underlay_hdr_len;
+ u16 const l3_len = is_ip4 ? sizeof(ip4_header_t) : sizeof(ip6_header_t);
+ u32 const csum_flags = is_ip4 ?
+ VNET_BUFFER_F_OFFLOAD_IP_CKSUM | VNET_BUFFER_F_IS_IP4 |
+ VNET_BUFFER_F_OFFLOAD_UDP_CKSUM :
+ VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
while (n_left_from > 0)
{
while (n_left_from >= 4 && n_left_to_next >= 2)
{
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 flow_hash0, flow_hash1;
- u32 len0, len1;
- ip4_header_t * ip4_0, * ip4_1;
- ip6_header_t * ip6_0, * ip6_1;
- udp_header_t * udp0, * udp1;
- u64 * copy_src0, * copy_dst0;
- u64 * copy_src1, * copy_dst1;
- u32 * copy_src_last0, * copy_dst_last0;
- u32 * copy_src_last1, * copy_dst_last1;
- u16 new_l0, new_l1;
- ip_csum_t sum0, sum1;
-
/* Prefetch next iteration. */
{
vlib_buffer_t * p2, * p3;
CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
}
- bi0 = from[0];
- bi1 = from[1];
- to_next[0] = bi0;
- to_next[1] = bi1;
+ u32 bi0 = to_next[0] = from[0];
+ u32 bi1 = to_next[1] = from[1];
from += 2;
to_next += 2;
n_left_to_next -= 2;
n_left_from -= 2;
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- flow_hash0 = vnet_l2_compute_flow_hash (b0);
- flow_hash1 = vnet_l2_compute_flow_hash (b1);
+ vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
+ vlib_buffer_t * b1 = vlib_get_buffer (vm, bi1);
+ u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
+ u32 flow_hash1 = vnet_l2_compute_flow_hash (b1);
/* Get next node index and adj index from tunnel next_dpo */
if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
{
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
- hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ vnet_hw_interface_t *hi0 =
+ vnet_get_sup_hw_interface (vnm, sw_if_index0);
t0 = &vxm->tunnels[hi0->dev_instance];
- /* Note: change to always set next0 if it may be set to drop */
+ /* Note: change to always set next0 if it may set to drop */
next0 = t0->next_dpo.dpoi_next_node;
+ dpoi_idx0 = t0->next_dpo.dpoi_index;
}
- vnet_buffer(b0)->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index;
/* Get next node index and adj index from tunnel next_dpo */
if (sw_if_index1 != vnet_buffer(b1)->sw_if_index[VLIB_TX])
{
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
- hi1 = vnet_get_sup_hw_interface (vnm, sw_if_index1);
- t1 = &vxm->tunnels[hi1->dev_instance];
- /* Note: change to always set next1 if it may be set to drop */
- next1 = t1->next_dpo.dpoi_next_node;
+ if (sw_if_index0 == vnet_buffer(b1)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index1 = sw_if_index0;
+ t1 = t0;
+ next1 = next0;
+ dpoi_idx1 = dpoi_idx0;
+ }
+ else
+ {
+ sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
+ vnet_hw_interface_t *hi1 =
+ vnet_get_sup_hw_interface (vnm, sw_if_index1);
+ t1 = &vxm->tunnels[hi1->dev_instance];
+ /* Note: change to always set next1 if it may set to drop */
+ next1 = t1->next_dpo.dpoi_next_node;
+ dpoi_idx1 = t1->next_dpo.dpoi_index;
+ }
}
- vnet_buffer(b1)->ip.adj_index[VLIB_TX] = t1->next_dpo.dpoi_index;
- /* Apply the rewrite string. $$$$ vnet_rewrite? */
- vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
- vlib_buffer_advance (b1, -(word)_vec_len(t1->rewrite));
+ vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
+ vnet_buffer(b1)->ip.adj_index[VLIB_TX] = dpoi_idx1;
+
+ ASSERT(t0->rewrite_header.data_bytes == underlay_hdr_len);
+ ASSERT(t1->rewrite_header.data_bytes == underlay_hdr_len);
+ vlib_buffer_advance (b0, -underlay_hdr_len);
+ vlib_buffer_advance (b1, -underlay_hdr_len);
+
+ u32 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u32 len1 = vlib_buffer_length_in_chain (vm, b1);
+ u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
+ u16 payload_l1 = clib_host_to_net_u16 (len1 - l3_len);
+
+ void * underlay0 = vlib_buffer_get_current(b0);
+ void * underlay1 = vlib_buffer_get_current(b1);
+
+ /* vnet_rewrite_two_header writes only in (uword) 8 bytes chunks
+ * and discards the first 4 bytes of the (36 bytes ip4 underlay) rewrite
+ * use memcpy as a workaround */
+ clib_memcpy(underlay0, t0->rewrite_header.data + rw_hdr_offset, underlay_hdr_len);
+ clib_memcpy(underlay1, t1->rewrite_header.data + rw_hdr_offset, underlay_hdr_len);
+
+ ip4_header_t * ip4_0, * ip4_1;
+ qos_bits_t ip4_0_tos = 0, ip4_1_tos = 0;
+ ip6_header_t * ip6_0, * ip6_1;
+ udp_header_t * udp0, * udp1;
+ u8 * l3_0, * l3_1;
if (is_ip4)
{
- /* IP4 VXLAN header should be 36 octects */
- ASSERT(sizeof(ip4_vxlan_header_t) == 36);
- ASSERT(vec_len(t0->rewrite) == sizeof(ip4_vxlan_header_t));
- ASSERT(vec_len(t1->rewrite) == sizeof(ip4_vxlan_header_t));
-
- ip4_0 = vlib_buffer_get_current(b0);
- ip4_1 = vlib_buffer_get_current(b1);
-
- /* Copy the fixed header */
- copy_dst0 = (u64 *) ip4_0;
- copy_src0 = (u64 *) t0->rewrite;
- copy_dst1 = (u64 *) ip4_1;
- copy_src1 = (u64 *) t1->rewrite;
- /* Copy first 32 octets 8-bytes at a time */
-#define _(offs) copy_dst0[offs] = copy_src0[offs];
- foreach_fixed_header4_offset;
-#undef _
-#define _(offs) copy_dst1[offs] = copy_src1[offs];
- foreach_fixed_header4_offset;
-#undef _
- /* Last 4 octets. Hopefully gcc will be our friend */
- copy_dst_last0 = (u32 *)(©_dst0[4]);
- copy_src_last0 = (u32 *)(©_src0[4]);
- copy_dst_last0[0] = copy_src_last0[0];
- copy_dst_last1 = (u32 *)(©_dst1[4]);
- copy_src_last1 = (u32 *)(©_src1[4]);
- copy_dst_last1[0] = copy_src_last1[0];
+ ip4_vxlan_header_t * hdr0 = underlay0;
+ ip4_vxlan_header_t * hdr1 = underlay1;
/* Fix the IP4 checksum and length */
- sum0 = ip4_0->checksum;
- new_l0 = /* old_l0 always 0, see the rewrite setup */
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
- sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
- length /* changed member */);
- ip4_0->checksum = ip_csum_fold (sum0);
- ip4_0->length = new_l0;
- sum1 = ip4_1->checksum;
- new_l1 = /* old_l1 always 0, see the rewrite setup */
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1));
- sum1 = ip_csum_update (sum1, old_l1, new_l1, ip4_header_t,
- length /* changed member */);
- ip4_1->checksum = ip_csum_fold (sum1);
- ip4_1->length = new_l1;
-
- /* Fix UDP length and set source port */
- udp0 = (udp_header_t *)(ip4_0+1);
- new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
- - sizeof (*ip4_0));
- udp0->length = new_l0;
- udp0->src_port = flow_hash0;
- udp1 = (udp_header_t *)(ip4_1+1);
- new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b1)
- - sizeof (*ip4_1));
- udp1->length = new_l1;
- udp1->src_port = flow_hash1;
+ ip4_0 = &hdr0->ip4;
+ ip4_1 = &hdr1->ip4;
+ ip4_0->length = clib_host_to_net_u16 (len0);
+ ip4_1->length = clib_host_to_net_u16 (len1);
+
+ if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+ {
+ ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
+ ip4_0->tos = ip4_0_tos;
+ }
+ if (PREDICT_FALSE (b1->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+ {
+ ip4_1_tos = vnet_buffer2 (b1)->qos.bits;
+ ip4_1->tos = ip4_1_tos;
+ }
+
+ l3_0 = (u8 *)ip4_0;
+ l3_1 = (u8 *)ip4_1;
+ udp0 = &hdr0->udp;
+ udp1 = &hdr1->udp;
}
else /* ipv6 */
{
- int bogus = 0;
+ ip6_vxlan_header_t * hdr0 = underlay0;
+ ip6_vxlan_header_t * hdr1 = underlay1;
- /* IP6 VXLAN header should be 56 octects */
- ASSERT(sizeof(ip6_vxlan_header_t) == 56);
- ASSERT(vec_len(t0->rewrite) == sizeof(ip6_vxlan_header_t));
- ASSERT(vec_len(t1->rewrite) == sizeof(ip6_vxlan_header_t));
- ip6_0 = vlib_buffer_get_current(b0);
- ip6_1 = vlib_buffer_get_current(b1);
-
- /* Copy the fixed header */
- copy_dst0 = (u64 *) ip6_0;
- copy_src0 = (u64 *) t0->rewrite;
- copy_dst1 = (u64 *) ip6_1;
- copy_src1 = (u64 *) t1->rewrite;
- /* Copy first 56 (ip6) octets 8-bytes at a time */
-#define _(offs) copy_dst0[offs] = copy_src0[offs];
- foreach_fixed_header6_offset;
-#undef _
-#define _(offs) copy_dst1[offs] = copy_src1[offs];
- foreach_fixed_header6_offset;
-#undef _
/* Fix IP6 payload length */
- new_l0 =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
- - sizeof(*ip6_0));
- ip6_0->payload_length = new_l0;
- new_l1 =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1)
- - sizeof(*ip6_1));
- ip6_1->payload_length = new_l1;
-
- /* Fix UDP length and set source port */
- udp0 = (udp_header_t *)(ip6_0+1);
- udp0->length = new_l0;
- udp0->src_port = flow_hash0;
- udp1 = (udp_header_t *)(ip6_1+1);
- udp1->length = new_l1;
- udp1->src_port = flow_hash1;
-
- /* IPv6 UDP checksum is mandatory */
- udp0->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0,
- ip6_0, &bogus);
- ASSERT(bogus == 0);
- if (udp0->checksum == 0)
- udp0->checksum = 0xffff;
- udp1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b1,
- ip6_1, &bogus);
- ASSERT(bogus == 0);
- if (udp1->checksum == 0)
- udp1->checksum = 0xffff;
+ ip6_0 = &hdr0->ip6;
+ ip6_1 = &hdr1->ip6;
+ ip6_0->payload_length = payload_l0;
+ ip6_1->payload_length = payload_l1;
+
+ l3_0 = (u8 *)ip6_0;
+ l3_1 = (u8 *)ip6_1;
+ udp0 = &hdr0->udp;
+ udp1 = &hdr1->udp;
}
- pkts_encapsulated += 2;
- len0 = vlib_buffer_length_in_chain (vm, b0);
- len1 = vlib_buffer_length_in_chain (vm, b1);
- stats_n_packets += 2;
- stats_n_bytes += len0 + len1;
-
- /* Batch stats increment on the same vxlan tunnel so counter is not
- incremented per packet. Note stats are still incremented for deleted
- and admin-down tunnel where packets are dropped. It is not worthwhile
- to check for this rare case and affect normal path performance. */
- if (PREDICT_FALSE ((sw_if_index0 != stats_sw_if_index) ||
- (sw_if_index1 != stats_sw_if_index)))
- {
- stats_n_packets -= 2;
- stats_n_bytes -= len0 + len1;
- if (sw_if_index0 == sw_if_index1)
+ /* Fix UDP length and set source port */
+ udp0->length = payload_l0;
+ udp0->src_port = flow_hash0;
+ udp1->length = payload_l1;
+ udp1->src_port = flow_hash1;
+
+ if (csum_offload)
+ {
+ b0->flags |= csum_flags;
+ vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
+ vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
+ b1->flags |= csum_flags;
+ vnet_buffer (b1)->l3_hdr_offset = l3_1 - b1->data;
+ vnet_buffer (b1)->l4_hdr_offset = (u8 *) udp1 - b1->data;
+ }
+ /* IPv4 UDP checksum only if checksum offload is used */
+ else if (is_ip4)
+ {
+ ip_csum_t sum0 = ip4_0->checksum;
+ sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
+ length /* changed member */);
+ if (PREDICT_FALSE (ip4_0_tos))
{
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- thread_index, stats_sw_if_index,
- stats_n_packets, stats_n_bytes);
- stats_sw_if_index = sw_if_index0;
- stats_n_packets = 2;
- stats_n_bytes = len0 + len1;
- }
- else
+ sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
+ tos /* changed member */);
+ }
+ ip4_0->checksum = ip_csum_fold (sum0);
+ ip_csum_t sum1 = ip4_1->checksum;
+ sum1 = ip_csum_update (sum1, 0, ip4_1->length, ip4_header_t,
+ length /* changed member */);
+ if (PREDICT_FALSE (ip4_1_tos))
{
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- thread_index, sw_if_index0, 1, len0);
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- thread_index, sw_if_index1, 1, len1);
+ sum1 = ip_csum_update (sum1, 0, ip4_1_tos, ip4_header_t,
+ tos /* changed member */);
}
- }
+ ip4_1->checksum = ip_csum_fold (sum1);
+ }
+ /* IPv6 UDP checksum is mandatory */
+ else
+ {
+ int bogus = 0;
+
+ udp0->checksum = ip6_tcp_udp_icmp_compute_checksum
+ (vm, b0, ip6_0, &bogus);
+ ASSERT(bogus == 0);
+ if (udp0->checksum == 0)
+ udp0->checksum = 0xffff;
+ udp1->checksum = ip6_tcp_udp_icmp_compute_checksum
+ (vm, b1, ip6_1, &bogus);
+ ASSERT(bogus == 0);
+ if (udp1->checksum == 0)
+ udp1->checksum = 0xffff;
+ }
+
+ vlib_increment_combined_counter (tx_counter, thread_index,
+ sw_if_index0, 1, len0);
+ vlib_increment_combined_counter (tx_counter, thread_index,
+ sw_if_index1, 1, len1);
+ pkts_encapsulated += 2;
if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
{
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 flow_hash0;
- u32 len0;
- ip4_header_t * ip4_0;
- ip6_header_t * ip6_0;
- udp_header_t * udp0;
- u64 * copy_src0, * copy_dst0;
- u32 * copy_src_last0, * copy_dst_last0;
- u16 new_l0;
- ip_csum_t sum0;
-
- bi0 = from[0];
- to_next[0] = bi0;
+ u32 bi0 = to_next[0] = from[0];
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
- b0 = vlib_get_buffer (vm, bi0);
-
- flow_hash0 = vnet_l2_compute_flow_hash(b0);
+ vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
+ u32 flow_hash0 = vnet_l2_compute_flow_hash(b0);
/* Get next node index and adj index from tunnel next_dpo */
if (sw_if_index0 != vnet_buffer(b0)->sw_if_index[VLIB_TX])
{
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
- hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ vnet_hw_interface_t *hi0 =
+ vnet_get_sup_hw_interface (vnm, sw_if_index0);
t0 = &vxm->tunnels[hi0->dev_instance];
/* Note: change to always set next0 if it may be set to drop */
next0 = t0->next_dpo.dpoi_next_node;
+ dpoi_idx0 = t0->next_dpo.dpoi_index;
}
- vnet_buffer(b0)->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index;
+ vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
+
+ ASSERT(t0->rewrite_header.data_bytes == underlay_hdr_len);
+
+ vlib_buffer_advance (b0, -underlay_hdr_len);
+ void * underlay0 = vlib_buffer_get_current(b0);
- /* Apply the rewrite string. $$$$ vnet_rewrite? */
- vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
+ /* vnet_rewrite_one_header writes only in (uword) 8 bytes chunks
+ * and discards the first 4 bytes of the (36 bytes ip4 underlay) rewrite
+ * use memcpy as a workaround */
+ clib_memcpy(underlay0, t0->rewrite_header.data + rw_hdr_offset, underlay_hdr_len);
+ u32 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
+
+ udp_header_t * udp0;
+ ip4_header_t * ip4_0;
+ qos_bits_t ip4_0_tos = 0;
+ ip6_header_t * ip6_0;
+ u8 * l3_0;
if (is_ip4)
{
- /* IP4 VXLAN header should be 36 octects */
- ASSERT(sizeof(ip4_vxlan_header_t) == 36);
- ASSERT(vec_len(t0->rewrite) == sizeof(ip4_vxlan_header_t));
- ip4_0 = vlib_buffer_get_current(b0);
-
- /* Copy the fixed header */
- copy_dst0 = (u64 *) ip4_0;
- copy_src0 = (u64 *) t0->rewrite;
- /* Copy first 32 octets 8-bytes at a time */
-#define _(offs) copy_dst0[offs] = copy_src0[offs];
- foreach_fixed_header4_offset;
-#undef _
- /* Last 4 octets. Hopefully gcc will be our friend */
- copy_dst_last0 = (u32 *)(©_dst0[4]);
- copy_src_last0 = (u32 *)(©_src0[4]);
- copy_dst_last0[0] = copy_src_last0[0];
+ ip4_vxlan_header_t * hdr = underlay0;
/* Fix the IP4 checksum and length */
- sum0 = ip4_0->checksum;
- new_l0 = /* old_l0 always 0, see the rewrite setup */
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
- sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
- length /* changed member */);
- ip4_0->checksum = ip_csum_fold (sum0);
- ip4_0->length = new_l0;
-
- /* Fix UDP length and set source port */
- udp0 = (udp_header_t *)(ip4_0+1);
- new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
- - sizeof (*ip4_0));
- udp0->length = new_l0;
- udp0->src_port = flow_hash0;
- }
+ ip4_0 = &hdr->ip4;
+ ip4_0->length = clib_host_to_net_u16 (len0);
+
+ if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+ {
+ ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
+ ip4_0->tos = ip4_0_tos;
+ }
+ l3_0 = (u8*)ip4_0;
+ udp0 = &hdr->udp;
+ }
else /* ip6 path */
{
- int bogus = 0;
+ ip6_vxlan_header_t * hdr = underlay0;
- /* IP6 VXLAN header should be 56 octects */
- ASSERT(sizeof(ip6_vxlan_header_t) == 56);
- ASSERT(vec_len(t0->rewrite) == sizeof(ip6_vxlan_header_t));
- ip6_0 = vlib_buffer_get_current(b0);
- /* Copy the fixed header */
- copy_dst0 = (u64 *) ip6_0;
- copy_src0 = (u64 *) t0->rewrite;
- /* Copy first 56 (ip6) octets 8-bytes at a time */
-#define _(offs) copy_dst0[offs] = copy_src0[offs];
- foreach_fixed_header6_offset;
-#undef _
/* Fix IP6 payload length */
- new_l0 =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
- - sizeof(*ip6_0));
- ip6_0->payload_length = new_l0;
-
- /* Fix UDP length and set source port */
- udp0 = (udp_header_t *)(ip6_0+1);
- udp0->length = new_l0;
- udp0->src_port = flow_hash0;
-
- /* IPv6 UDP checksum is mandatory */
- udp0->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0,
- ip6_0, &bogus);
- ASSERT(bogus == 0);
- if (udp0->checksum == 0)
- udp0->checksum = 0xffff;
+ ip6_0 = &hdr->ip6;
+ ip6_0->payload_length = payload_l0;
+
+ l3_0 = (u8 *)ip6_0;
+ udp0 = &hdr->udp;
}
+ /* Fix UDP length and set source port */
+ udp0->length = payload_l0;
+ udp0->src_port = flow_hash0;
+
+ if (csum_offload)
+ {
+ b0->flags |= csum_flags;
+ vnet_buffer (b0)->l3_hdr_offset = l3_0 - b0->data;
+ vnet_buffer (b0)->l4_hdr_offset = (u8 *) udp0 - b0->data;
+ }
+ /* IPv4 UDP checksum only if checksum offload is used */
+ else if (is_ip4)
+ {
+ ip_csum_t sum0 = ip4_0->checksum;
+ sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
+ length /* changed member */);
+ if (PREDICT_FALSE (ip4_0_tos))
+ {
+ sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
+ tos /* changed member */);
+ }
+ ip4_0->checksum = ip_csum_fold (sum0);
+ }
+ /* IPv6 UDP checksum is mandatory */
+ else
+ {
+ int bogus = 0;
+
+ udp0->checksum = ip6_tcp_udp_icmp_compute_checksum
+ (vm, b0, ip6_0, &bogus);
+ ASSERT(bogus == 0);
+ if (udp0->checksum == 0)
+ udp0->checksum = 0xffff;
+ }
+
+ vlib_increment_combined_counter (tx_counter, thread_index,
+ sw_if_index0, 1, len0);
pkts_encapsulated ++;
- len0 = vlib_buffer_length_in_chain (vm, b0);
- stats_n_packets += 1;
- stats_n_bytes += len0;
-
- /* Batch stats increment on the same vxlan tunnel so counter is not
- incremented per packet. Note stats are still incremented for deleted
- and admin-down tunnel where packets are dropped. It is not worthwhile
- to check for this rare case and affect normal path performance. */
- if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
- {
- stats_n_packets -= 1;
- stats_n_bytes -= len0;
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- thread_index, stats_sw_if_index,
- stats_n_packets, stats_n_bytes);
- stats_n_packets = 1;
- stats_n_bytes = len0;
- stats_sw_if_index = sw_if_index0;
- }
if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
{
VXLAN_ENCAP_ERROR_ENCAPSULATED,
pkts_encapsulated);
- /* Increment any remaining batch stats */
- if (stats_n_packets)
- {
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
- node->runtime_data[0] = stats_sw_if_index;
- }
-
return from_frame->n_vectors;
}
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 1);
+ /* Disable chksum offload as setup overhead in tx node is not worthwhile
+ for ip4 header checksum only, unless udp checksum is also required */
+ return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 1,
+ /* csum_offload */ 0);
}
static uword
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0);
+ /* Enable checksum offload for ip6 as udp checksum is mandatory, */
+ return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0,
+ /* csum_offload */ 1);
}
VLIB_REGISTER_NODE (vxlan4_encap_node) = {
Code Review / vpp.git / blobdiff