+++ /dev/null
-
-/*
- * Copyright (c) 2015 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#include <vppinfra/error.h>
-#include <vppinfra/hash.h>
-#include <vnet/vnet.h>
-#include <vnet/ip/ip.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/interface_output.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 \
-_(ENCAPSULATED, "good packets encapsulated")
-
-static char *vxlan_encap_error_strings[] = {
-#define _(sym,string) string,
- foreach_vxlan_encap_error
-#undef _
-};
-
-typedef enum
-{
-#define _(sym,str) VXLAN_ENCAP_ERROR_##sym,
- foreach_vxlan_encap_error
-#undef _
- VXLAN_ENCAP_N_ERROR,
-} vxlan_encap_error_t;
-
-typedef enum
-{
- VXLAN_ENCAP_NEXT_DROP,
- VXLAN_ENCAP_N_NEXT,
-} vxlan_encap_next_t;
-
-typedef struct
-{
- u32 tunnel_index;
- u32 vni;
-} vxlan_encap_trace_t;
-
-#ifndef CLIB_MARCH_VARIANT
-u8 *
-format_vxlan_encap_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- vxlan_encap_trace_t *t = va_arg (*args, vxlan_encap_trace_t *);
-
- s = format (s, "VXLAN encap to vxlan_tunnel%d vni %d",
- t->tunnel_index, t->vni);
- return s;
-}
-#endif
-
-always_inline uword
-vxlan_encap_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
- vlib_frame_t *from_frame, u8 is_ip4)
-{
- 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;
- u32 thread_index = vlib_get_thread_index ();
- u32 sw_if_index0 = 0, sw_if_index1 = 0;
- u32 next0 = 0, next1 = 0;
- vxlan_tunnel_t *t0 = NULL, *t1 = NULL;
- index_t dpoi_idx0 = INDEX_INVALID, dpoi_idx1 = INDEX_INVALID;
- vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
- vlib_buffer_t **b = bufs;
-
- from = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
-
- next_index = node->cached_next_index;
-
- 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);
- u16 const l3_len = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
- u32 const outer_packet_csum_offload_flags =
- is_ip4 ? (VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM |
- VNET_BUFFER_OFFLOAD_F_TNL_VXLAN) :
- (VNET_BUFFER_OFFLOAD_F_OUTER_UDP_CKSUM |
- VNET_BUFFER_OFFLOAD_F_TNL_VXLAN);
-
- vlib_get_buffers (vm, from, bufs, n_left_from);
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- /* Prefetch next iteration. */
- {
- vlib_prefetch_buffer_header (b[2], LOAD);
- vlib_prefetch_buffer_header (b[3], LOAD);
-
- CLIB_PREFETCH (b[2]->data - CLIB_CACHE_LINE_BYTES,
- 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (b[3]->data - CLIB_CACHE_LINE_BYTES,
- 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- 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;
-
- vlib_buffer_t *b0 = b[0];
- vlib_buffer_t *b1 = b[1];
- b += 2;
-
- 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];
- 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 set to drop */
- next0 = t0->next_dpo.dpoi_next_node;
- dpoi_idx0 = 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])
- {
- 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 (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);
- vnet_rewrite_two_headers (*t0, *t1, vlib_buffer_get_current (b0),
- vlib_buffer_get_current (b1),
- 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);
-
- 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_t *hdr0 = underlay0;
- ip4_vxlan_header_t *hdr1 = underlay1;
-
- /* Fix the IP4 checksum and length */
- 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 */
- {
- ip6_vxlan_header_t *hdr0 = underlay0;
- ip6_vxlan_header_t *hdr1 = underlay1;
-
- /* Fix IP6 payload length */
- 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;
- }
-
- /* 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 (b0->flags & VNET_BUFFER_F_OFFLOAD)
- {
- vnet_buffer2 (b0)->outer_l3_hdr_offset = l3_0 - b0->data;
- vnet_buffer2 (b0)->outer_l4_hdr_offset = (u8 *) udp0 - b0->data;
- vnet_buffer_offload_flags_set (b0,
- outer_packet_csum_offload_flags);
- }
- /* IPv4 checksum only */
- 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;
- }
-
- if (b1->flags & VNET_BUFFER_F_OFFLOAD)
- {
- vnet_buffer2 (b1)->outer_l3_hdr_offset = l3_1 - b1->data;
- vnet_buffer2 (b1)->outer_l4_hdr_offset = (u8 *) udp1 - b1->data;
- vnet_buffer_offload_flags_set (b1,
- outer_packet_csum_offload_flags);
- }
- /* IPv4 checksum only */
- else if (is_ip4)
- {
- 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))
- {
- 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;
-
- udp1->checksum = ip6_tcp_udp_icmp_compute_checksum
- (vm, b1, ip6_1, &bogus);
- ASSERT (bogus == 0);
- if (udp1->checksum == 0)
- udp1->checksum = 0xffff;
- }
-
- /* save inner packet flow_hash for load-balance node */
- vnet_buffer (b0)->ip.flow_hash = flow_hash0;
- vnet_buffer (b1)->ip.flow_hash = flow_hash1;
-
- if (sw_if_index0 == sw_if_index1)
- {
- vlib_increment_combined_counter (tx_counter, thread_index,
- sw_if_index0, 2, len0 + len1);
- }
- else
- {
- 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))
- {
- vxlan_encap_trace_t *tr =
- vlib_add_trace (vm, node, b0, sizeof (*tr));
- tr->tunnel_index = t0 - vxm->tunnels;
- tr->vni = t0->vni;
- }
-
- if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- vxlan_encap_trace_t *tr =
- vlib_add_trace (vm, node, b1, sizeof (*tr));
- tr->tunnel_index = t1 - vxm->tunnels;
- tr->vni = t1->vni;
- }
-
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0 = to_next[0] = from[0];
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- vlib_buffer_t *b0 = b[0];
- b += 1;
-
- 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];
- 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] = dpoi_idx0;
-
- ASSERT (t0->rewrite_header.data_bytes == underlay_hdr_len);
- vnet_rewrite_one_header (*t0, vlib_buffer_get_current (b0),
- underlay_hdr_len);
-
- vlib_buffer_advance (b0, -underlay_hdr_len);
- void *underlay0 = vlib_buffer_get_current (b0);
-
- 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_t *hdr = underlay0;
-
- /* Fix the IP4 checksum and length */
- 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 */
- {
- ip6_vxlan_header_t *hdr = underlay0;
-
- /* Fix IP6 payload length */
- 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 (b0->flags & VNET_BUFFER_F_OFFLOAD)
- {
- vnet_buffer2 (b0)->outer_l3_hdr_offset = l3_0 - b0->data;
- vnet_buffer2 (b0)->outer_l4_hdr_offset = (u8 *) udp0 - b0->data;
- vnet_buffer_offload_flags_set (b0,
- outer_packet_csum_offload_flags);
- }
- /* IPv4 checksum only */
- 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;
- }
-
- /* reuse inner packet flow_hash for load-balance node */
- vnet_buffer (b0)->ip.flow_hash = flow_hash0;
-
- vlib_increment_combined_counter (tx_counter, thread_index,
- sw_if_index0, 1, len0);
- pkts_encapsulated++;
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vxlan_encap_trace_t *tr =
- vlib_add_trace (vm, node, b0, sizeof (*tr));
- tr->tunnel_index = t0 - vxm->tunnels;
- tr->vni = t0->vni;
- }
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- /* Do we still need this now that tunnel tx stats is kept? */
- vlib_node_increment_counter (vm, node->node_index,
- VXLAN_ENCAP_ERROR_ENCAPSULATED,
- pkts_encapsulated);
-
- return from_frame->n_vectors;
-}
-
-VLIB_NODE_FN (vxlan4_encap_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- /* 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);
-}
-
-VLIB_NODE_FN (vxlan6_encap_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- /* Enable checksum offload for ip6 as udp checksum is mandatory, */
- return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vxlan4_encap_node) = {
- .name = "vxlan4-encap",
- .vector_size = sizeof (u32),
- .format_trace = format_vxlan_encap_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(vxlan_encap_error_strings),
- .error_strings = vxlan_encap_error_strings,
- .n_next_nodes = VXLAN_ENCAP_N_NEXT,
- .next_nodes = {
- [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
- },
-};
-
-VLIB_REGISTER_NODE (vxlan6_encap_node) = {
- .name = "vxlan6-encap",
- .vector_size = sizeof (u32),
- .format_trace = format_vxlan_encap_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(vxlan_encap_error_strings),
- .error_strings = vxlan_encap_error_strings,
- .n_next_nodes = VXLAN_ENCAP_N_NEXT,
- .next_nodes = {
- [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff