+++ /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/vxlan/vxlan.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;
-
-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;
-}
-
-
-#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)
-{
- 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;
- u32 pkts_encapsulated = 0;
- u16 old_l0 = 0, old_l1 = 0;
- u32 cpu_index = os_get_cpu_number();
- 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;
-
- 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;
-
- 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)
- {
- 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;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- bi0 = from[0];
- bi1 = from[1];
- to_next[0] = bi0;
- to_next[1] = bi1;
- 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);
-
- /* 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);
- 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;
- }
- 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;
- }
- 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));
-
- 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];
-
- /* 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;
- }
- else /* ipv6 */
- {
- int bogus = 0;
-
- /* 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;
- }
-
- 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)
- {
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- cpu_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
- {
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- cpu_index, sw_if_index0, 1, len0);
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- cpu_index, sw_if_index1, 1, len1);
- }
- }
-
- 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;
- 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;
- 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);
-
- /* 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);
- 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;
- }
- vnet_buffer(b0)->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index;
-
- /* Apply the rewrite string. $$$$ vnet_rewrite? */
- vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
-
- 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];
-
- /* 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;
- }
-
- else /* ip6 path */
- {
- int bogus = 0;
-
- /* 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;
- }
-
- 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,
- cpu_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_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);
-
- /* Increment any remaining batch stats */
- if (stats_n_packets)
- {
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
- cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
- node->runtime_data[0] = stats_sw_if_index;
- }
-
- return from_frame->n_vectors;
-}
-
-static uword
-vxlan4_encap (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 1);
-}
-
-static uword
-vxlan6_encap (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0);
-}
-
-VLIB_REGISTER_NODE (vxlan4_encap_node) = {
- .function = vxlan4_encap,
- .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_NODE_FUNCTION_MULTIARCH (vxlan4_encap_node, vxlan4_encap)
-
-VLIB_REGISTER_NODE (vxlan6_encap_node) = {
- .function = vxlan6_encap,
- .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",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_encap_node, vxlan6_encap)
-
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