src/plugins/ioam/export-common/ioam_export.h

   1 /*
   2  * Copyright (c) 2016 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 #ifndef __included_ioam_export_h__
  16 #define __included_ioam_export_h__
  17
  18 #include <vnet/vnet.h>
  19 #include <vnet/ip/ip.h>
  20 #include <vnet/ip/ip_packet.h>
  21 #include <vnet/ip/ip4_packet.h>
  22 #include <vnet/ip/ip6_packet.h>
  23 #include <vnet/ip/ip6_hop_by_hop.h>
  24 #include <vnet/udp/udp_local.h>
  25 #include <vnet/udp/udp_packet.h>
  26 #include <vnet/ipfix-export/ipfix_packet.h>
  27
  28 #include <vppinfra/pool.h>
  29 #include <vppinfra/hash.h>
  30 #include <vppinfra/error.h>
  31 #include <vppinfra/elog.h>
  32 #include <vppinfra/lock.h>
  33
  34 #include <vlib/threads.h>
  35
  36 typedef struct ioam_export_buffer
  37 {
  38   /** Required for pool_get_aligned */
  39   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  40   /* Allocated buffer */
  41   u32 buffer_index;
  42   u64 touched_at;
  43   u8 records_in_this_buffer;
  44 } ioam_export_buffer_t;
  45
  46
  47 typedef struct
  48 {
  49   /* API message ID base */
  50   u16 msg_id_base;
  51   u16 set_id;
  52
  53   /* TODO: to support multiple collectors all this has to be grouped and create a vector here */
  54   u8 *record_header;
  55   u32 sequence_number;
  56   u32 domain_id;
  57
  58   /* ipfix collector, our ip address */
  59   ip4_address_t ipfix_collector;
  60   ip4_address_t src_address;
  61
  62   /* Pool of ioam_export_buffer_t */
  63   ioam_export_buffer_t *buffer_pool;
  64   /* Vector of per thread ioam_export_buffer_t to buffer pool index */
  65   u32 *buffer_per_thread;
  66   /* Lock per thread to swap buffers between worker and timer process */
  67   clib_spinlock_t *lockp;
  68
  69   /* time scale transform */
  70   u32 unix_time_0;
  71   f64 vlib_time_0;
  72
  73   /* convenience */
  74   vlib_main_t *vlib_main;
  75   vnet_main_t *vnet_main;
  76   ethernet_main_t *ethernet_main;
  77   u32 next_node_index;
  78
  79   uword my_hbh_slot;
  80   u32 export_process_node_index;
  81 } ioam_export_main_t;
  82
  83
  84 #define DEFAULT_EXPORT_SIZE (3 * CLIB_CACHE_LINE_BYTES)
  85 /*
  86  *  Number of records in a buffer
  87  * ~(MTU (1500) - [ip hdr(40) + UDP(8) + ipfix (24)]) / DEFAULT_EXPORT_SIZE
  88  */
  89 #define DEFAULT_EXPORT_RECORDS 7
  90
  91 inline static void
  92 ioam_export_set_next_node (ioam_export_main_t * em, u8 * next_node_name)
  93 {
  94   vlib_node_t *next_node;
  95
  96   next_node = vlib_get_node_by_name (em->vlib_main, next_node_name);
  97   em->next_node_index = next_node->index;
  98 }
  99
 100 inline static void
 101 ioam_export_reset_next_node (ioam_export_main_t * em)
 102 {
 103   vlib_node_t *next_node;
 104
 105   next_node = vlib_get_node_by_name (em->vlib_main, (u8 *) "ip4-lookup");
 106   em->next_node_index = next_node->index;
 107 }
 108
 109 always_inline ioam_export_buffer_t *
 110 ioam_export_get_my_buffer (ioam_export_main_t * em, u32 thread_id)
 111 {
 112
 113   if (vec_len (em->buffer_per_thread) > thread_id)
 114     return (pool_elt_at_index
 115             (em->buffer_pool, em->buffer_per_thread[thread_id]));
 116   return (0);
 117 }
 118
 119 inline static int
 120 ioam_export_buffer_add_header (ioam_export_main_t * em, vlib_buffer_t * b0)
 121 {
 122   clib_memcpy_fast (b0->data, em->record_header, vec_len (em->record_header));
 123   b0->current_data = 0;
 124   b0->current_length = vec_len (em->record_header);
 125   b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 126   return (1);
 127 }
 128
 129 inline static int
 130 ioam_export_init_buffer (ioam_export_main_t * em, vlib_main_t * vm,
 131                          ioam_export_buffer_t * eb)
 132 {
 133   vlib_buffer_t *b = 0;
 134
 135   if (!eb)
 136     return (-1);
 137   /* TODO: Perhaps buffer init from template here */
 138   if (vlib_buffer_alloc (vm, &(eb->buffer_index), 1) != 1)
 139     return (-2);
 140   eb->records_in_this_buffer = 0;
 141   eb->touched_at = vlib_time_now (vm);
 142   b = vlib_get_buffer (vm, eb->buffer_index);
 143   (void) ioam_export_buffer_add_header (em, b);
 144   vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
 145   vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
 146   return (1);
 147 }
 148
 149 inline static void
 150 ioam_export_thread_buffer_free (ioam_export_main_t * em)
 151 {
 152   vlib_main_t *vm = em->vlib_main;
 153   ioam_export_buffer_t *eb = 0;
 154   int i;
 155   for (i = 0; i < vec_len (em->buffer_per_thread); i++)
 156     {
 157       eb = pool_elt_at_index (em->buffer_pool, em->buffer_per_thread[i]);
 158       if (eb)
 159         vlib_buffer_free (vm, &(eb->buffer_index), 1);
 160     }
 161   for (i = 0; i < vec_len (em->lockp); i++)
 162     clib_mem_free ((void *) em->lockp[i]);
 163   vec_free (em->buffer_per_thread);
 164   pool_free (em->buffer_pool);
 165   vec_free (em->lockp);
 166   em->buffer_per_thread = 0;
 167   em->buffer_pool = 0;
 168   em->lockp = 0;
 169 }
 170
 171 inline static int
 172 ioam_export_thread_buffer_init (ioam_export_main_t * em, vlib_main_t * vm)
 173 {
 174   int no_of_threads = vec_len (vlib_worker_threads);
 175   int i;
 176   ioam_export_buffer_t *eb = 0;
 177
 178   pool_alloc_aligned (em->buffer_pool,
 179                       no_of_threads - 1, CLIB_CACHE_LINE_BYTES);
 180   vec_validate_aligned (em->buffer_per_thread,
 181                         no_of_threads - 1, CLIB_CACHE_LINE_BYTES);
 182   vec_validate_aligned (em->lockp, no_of_threads - 1, CLIB_CACHE_LINE_BYTES);
 183
 184   if (!em->buffer_per_thread || !em->buffer_pool || !em->lockp)
 185     {
 186       return (-1);
 187     }
 188   for (i = 0; i < no_of_threads; i++)
 189     {
 190       eb = 0;
 191       pool_get_aligned (em->buffer_pool, eb, CLIB_CACHE_LINE_BYTES);
 192       clib_memset (eb, 0, sizeof (*eb));
 193       em->buffer_per_thread[i] = eb - em->buffer_pool;
 194       if (ioam_export_init_buffer (em, vm, eb) != 1)
 195         {
 196           ioam_export_thread_buffer_free (em);
 197           return (-2);
 198         }
 199       clib_spinlock_init (&em->lockp[i]);
 200     }
 201   return (1);
 202 }
 203
 204 #define IPFIX_IOAM_EXPORT_ID 272
 205 #define IPFIX_VXLAN_IOAM_EXPORT_ID 273
 206
 207 /* Used to build the rewrite */
 208 /* data set packet */
 209 typedef struct
 210 {
 211   ipfix_message_header_t h;
 212   ipfix_set_header_t s;
 213 } ipfix_data_packet_t;
 214
 215 typedef struct
 216 {
 217   ip4_header_t ip4;
 218   udp_header_t udp;
 219   ipfix_data_packet_t ipfix;
 220 } ip4_ipfix_data_packet_t;
 221
 222
 223 inline static void
 224 ioam_export_header_cleanup (ioam_export_main_t * em,
 225                             ip4_address_t * collector_address,
 226                             ip4_address_t * src_address)
 227 {
 228   vec_free (em->record_header);
 229   em->record_header = 0;
 230 }
 231
 232 inline static int
 233 ioam_export_header_create (ioam_export_main_t * em,
 234                            ip4_address_t * collector_address,
 235                            ip4_address_t * src_address)
 236 {
 237   ip4_header_t *ip;
 238   udp_header_t *udp;
 239   ipfix_message_header_t *h;
 240   ipfix_set_header_t *s;
 241   u8 *rewrite = 0;
 242   ip4_ipfix_data_packet_t *tp;
 243
 244
 245   /* allocate rewrite space */
 246   vec_validate_aligned (rewrite,
 247                         sizeof (ip4_ipfix_data_packet_t) - 1,
 248                         CLIB_CACHE_LINE_BYTES);
 249
 250   tp = (ip4_ipfix_data_packet_t *) rewrite;
 251   ip = (ip4_header_t *) & tp->ip4;
 252   udp = (udp_header_t *) (ip + 1);
 253   h = (ipfix_message_header_t *) (udp + 1);
 254   s = (ipfix_set_header_t *) (h + 1);
 255
 256   ip->ip_version_and_header_length = 0x45;
 257   ip->ttl = 254;
 258   ip->protocol = IP_PROTOCOL_UDP;
 259   ip->src_address.as_u32 = src_address->as_u32;
 260   ip->dst_address.as_u32 = collector_address->as_u32;
 261   udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
 262   udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
 263   /* FIXUP: UDP length */
 264   udp->length = clib_host_to_net_u16 (vec_len (rewrite) +
 265                                       (DEFAULT_EXPORT_RECORDS *
 266                                        DEFAULT_EXPORT_SIZE) - sizeof (*ip));
 267
 268   /* FIXUP: message header export_time */
 269   /* FIXUP: message header sequence_number */
 270   h->domain_id = clib_host_to_net_u32 (em->domain_id);
 271
 272   /*FIXUP: Setid length in octets if records exported are not default */
 273   s->set_id_length = ipfix_set_id_length (em->set_id,
 274                                           (sizeof (*s) +
 275                                            (DEFAULT_EXPORT_RECORDS *
 276                                             DEFAULT_EXPORT_SIZE)));
 277
 278   /* FIXUP: h version and length length in octets if records exported are not default */
 279   h->version_length = version_length (sizeof (*h) +
 280                                       (sizeof (*s) +
 281                                        (DEFAULT_EXPORT_RECORDS *
 282                                         DEFAULT_EXPORT_SIZE)));
 283
 284   /* FIXUP: ip length if records exported are not default */
 285   /* FIXUP: ip checksum if records exported are not default */
 286   ip->length = clib_host_to_net_u16 (vec_len (rewrite) +
 287                                      (DEFAULT_EXPORT_RECORDS *
 288                                       DEFAULT_EXPORT_SIZE));
 289   ip->checksum = ip4_header_checksum (ip);
 290   _vec_len (rewrite) = sizeof (ip4_ipfix_data_packet_t);
 291   em->record_header = rewrite;
 292   return (1);
 293 }
 294
 295 inline static int
 296 ioam_export_send_buffer (ioam_export_main_t * em, vlib_main_t * vm,
 297                          ioam_export_buffer_t * eb)
 298 {
 299   ip4_header_t *ip;
 300   udp_header_t *udp;
 301   ipfix_message_header_t *h;
 302   ipfix_set_header_t *s;
 303   ip4_ipfix_data_packet_t *tp;
 304   vlib_buffer_t *b0;
 305   u16 new_l0, old_l0;
 306   ip_csum_t sum0;
 307   vlib_frame_t *nf = 0;
 308   u32 *to_next;
 309
 310   b0 = vlib_get_buffer (vm, eb->buffer_index);
 311   tp = vlib_buffer_get_current (b0);
 312   ip = (ip4_header_t *) & tp->ip4;
 313   udp = (udp_header_t *) (ip + 1);
 314   h = (ipfix_message_header_t *) (udp + 1);
 315   s = (ipfix_set_header_t *) (h + 1);
 316
 317   /* FIXUP: message header export_time */
 318   h->export_time = clib_host_to_net_u32 ((u32)
 319                                          (((f64) em->unix_time_0) +
 320                                           (vlib_time_now (em->vlib_main) -
 321                                            em->vlib_time_0)));
 322
 323   /* FIXUP: message header sequence_number */
 324   h->sequence_number = clib_host_to_net_u32 (em->sequence_number++);
 325
 326   /* FIXUP: lengths if different from default */
 327   if (PREDICT_FALSE (eb->records_in_this_buffer != DEFAULT_EXPORT_RECORDS))
 328     {
 329       s->set_id_length = ipfix_set_id_length (em->set_id /* set_id */ ,
 330                                               b0->current_length -
 331                                               (sizeof (*ip) + sizeof (*udp) +
 332                                                sizeof (*h)));
 333       h->version_length =
 334         version_length (b0->current_length - (sizeof (*ip) + sizeof (*udp)));
 335       sum0 = ip->checksum;
 336       old_l0 = ip->length;
 337       new_l0 = clib_host_to_net_u16 ((u16) b0->current_length);
 338       sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 339                              length /* changed member */ );
 340       ip->checksum = ip_csum_fold (sum0);
 341       ip->length = new_l0;
 342       udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 343     }
 344
 345   /* Enqueue pkts to ip4-lookup */
 346
 347   nf = vlib_get_frame_to_node (vm, em->next_node_index);
 348   nf->n_vectors = 0;
 349   to_next = vlib_frame_vector_args (nf);
 350   nf->n_vectors = 1;
 351   to_next[0] = eb->buffer_index;
 352   vlib_put_frame_to_node (vm, em->next_node_index, nf);
 353   return (1);
 354
 355 }
 356
 357 #define EXPORT_TIMEOUT (20.0)
 358 #define THREAD_PERIOD (30.0)
 359 inline static uword
 360 ioam_export_process_common (ioam_export_main_t * em, vlib_main_t * vm,
 361                             vlib_node_runtime_t * rt, vlib_frame_t * f,
 362                             u32 index)
 363 {
 364   f64 now;
 365   f64 timeout = 30.0;
 366   uword event_type;
 367   uword *event_data = 0;
 368   int i;
 369   ioam_export_buffer_t *eb = 0, *new_eb = 0;
 370   u32 *vec_buffer_indices = 0;
 371   u32 *vec_buffer_to_be_sent = 0;
 372   u32 *thread_index = 0;
 373   u32 new_pool_index = 0;
 374
 375   em->export_process_node_index = index;
 376   /* Wait for Godot... */
 377   vlib_process_wait_for_event_or_clock (vm, 1e9);
 378   event_type = vlib_process_get_events (vm, &event_data);
 379   if (event_type != 1)
 380     clib_warning ("bogus kickoff event received, %d", event_type);
 381   vec_reset_length (event_data);
 382
 383   while (1)
 384     {
 385       vlib_process_wait_for_event_or_clock (vm, timeout);
 386       event_type = vlib_process_get_events (vm, &event_data);
 387       switch (event_type)
 388         {
 389         case 2:         /* Stop and Wait for kickoff again */
 390           timeout = 1e9;
 391           break;
 392         case 1:         /* kickoff : Check for unsent buffers */
 393           timeout = THREAD_PERIOD;
 394           break;
 395         case ~0:                /* timeout */
 396           break;
 397         }
 398       vec_reset_length (event_data);
 399       now = vlib_time_now (vm);
 400       /*
 401        * Create buffers for threads that are not active enough
 402        * to send out the export records
 403        */
 404       for (i = 0; i < vec_len (em->buffer_per_thread); i++)
 405         {
 406           /* If the worker thread is processing export records ignore further checks */
 407           if (CLIB_SPINLOCK_IS_LOCKED (&em->lockp[i]))
 408             continue;
 409           eb = pool_elt_at_index (em->buffer_pool, em->buffer_per_thread[i]);
 410           if (eb->records_in_this_buffer > 0
 411               && now > (eb->touched_at + EXPORT_TIMEOUT))
 412             {
 413               pool_get_aligned (em->buffer_pool, new_eb,
 414                                 CLIB_CACHE_LINE_BYTES);
 415               clib_memset (new_eb, 0, sizeof (*new_eb));
 416               if (ioam_export_init_buffer (em, vm, new_eb) == 1)
 417                 {
 418                   new_pool_index = new_eb - em->buffer_pool;
 419                   vec_add (vec_buffer_indices, &new_pool_index, 1);
 420                   vec_add (vec_buffer_to_be_sent, &em->buffer_per_thread[i],
 421                            1);
 422                   vec_add (thread_index, &i, 1);
 423                 }
 424               else
 425                 {
 426                   pool_put (em->buffer_pool, new_eb);
 427                   /*Give up */
 428                   goto CLEANUP;
 429                 }
 430             }
 431         }
 432       if (vec_len (thread_index) != 0)
 433         {
 434           /*
 435            * Now swap the buffers out
 436            */
 437           for (i = 0; i < vec_len (thread_index); i++)
 438             {
 439               clib_spinlock_lock (&em->lockp[thread_index[i]]);
 440               em->buffer_per_thread[thread_index[i]] =
 441                 vec_pop (vec_buffer_indices);
 442               clib_spinlock_unlock (&em->lockp[thread_index[i]]);
 443             }
 444
 445           /* Send the buffers */
 446           for (i = 0; i < vec_len (vec_buffer_to_be_sent); i++)
 447             {
 448               eb =
 449                 pool_elt_at_index (em->buffer_pool, vec_buffer_to_be_sent[i]);
 450               ioam_export_send_buffer (em, vm, eb);
 451               pool_put (em->buffer_pool, eb);
 452             }
 453         }
 454
 455     CLEANUP:
 456       /* Free any leftover/unused buffers and everything that was allocated */
 457       for (i = 0; i < vec_len (vec_buffer_indices); i++)
 458         {
 459           new_eb = pool_elt_at_index (em->buffer_pool, vec_buffer_indices[i]);
 460           vlib_buffer_free (vm, &new_eb->buffer_index, 1);
 461           pool_put (em->buffer_pool, new_eb);
 462         }
 463       vec_free (vec_buffer_indices);
 464       vec_free (vec_buffer_to_be_sent);
 465       vec_free (thread_index);
 466     }
 467   return 0;                     /* not so much */
 468 }
 469
 470 #define ioam_export_node_common(EM, VM, N, F, HTYPE, L, V, NEXT, FIXUP_FUNC)   \
 471 do {                                                                           \
 472   u32 n_left_from, *from, *to_next;                                            \
 473   export_next_t next_index;                                                    \
 474   u32 pkts_recorded = 0;                                                       \
 475   ioam_export_buffer_t *my_buf = 0;                                            \
 476   vlib_buffer_t *eb0 = 0;                                                      \
 477   u32 ebi0 = 0;                                                                \
 478   from = vlib_frame_vector_args (F);                                           \
 479   n_left_from = (F)->n_vectors;                                                \
 480   next_index = (N)->cached_next_index;                                         \
 481   clib_spinlock_lock (&(EM)->lockp[(VM)->thread_index]);                       \
 482   my_buf = ioam_export_get_my_buffer (EM, (VM)->thread_index);                 \
 483   my_buf->touched_at = vlib_time_now (VM);                                     \
 484   while (n_left_from > 0)                                                      \
 485     {                                                                          \
 486       u32 n_left_to_next;                                                      \
 487       vlib_get_next_frame (VM, N, next_index, to_next, n_left_to_next);        \
 488       while (n_left_from >= 4 && n_left_to_next >= 2)                          \
 489         {                                                                      \
 490           u32 next0 = NEXT;                                                    \
 491           u32 next1 = NEXT;                                                    \
 492           u32 bi0, bi1;                                                        \
 493           HTYPE *ip0, *ip1;                                                    \
 494           vlib_buffer_t *p0, *p1;                                              \
 495           u32 ip_len0, ip_len1;                                                \
 496           {                                                                    \
 497             vlib_buffer_t *p2, *p3;                                            \
 498             p2 = vlib_get_buffer (VM, from[2]);                                \
 499             p3 = vlib_get_buffer (VM, from[3]);                                \
 500             vlib_prefetch_buffer_header (p2, LOAD);                            \
 501             vlib_prefetch_buffer_header (p3, LOAD);                            \
 502             CLIB_PREFETCH (p2->data, 3 * CLIB_CACHE_LINE_BYTES, LOAD);         \
 503             CLIB_PREFETCH (p3->data, 3 * CLIB_CACHE_LINE_BYTES, LOAD);         \
 504           }                                                                    \
 505           to_next[0] = bi0 = from[0];                                          \
 506           to_next[1] = bi1 = from[1];                                          \
 507           from += 2;                                                           \
 508           to_next += 2;                                                        \
 509           n_left_from -= 2;                                                    \
 510           n_left_to_next -= 2;                                                 \
 511           p0 = vlib_get_buffer (VM, bi0);                                      \
 512           p1 = vlib_get_buffer (VM, bi1);                                      \
 513           ip0 = vlib_buffer_get_current (p0);                                  \
 514           ip1 = vlib_buffer_get_current (p1);                                  \
 515           ip_len0 =                                                            \
 516             clib_net_to_host_u16 (ip0->L) + sizeof (HTYPE);                    \
 517           ip_len1 =                                                            \
 518             clib_net_to_host_u16 (ip1->L) + sizeof (HTYPE);                    \
 519           ebi0 = my_buf->buffer_index;                                         \
 520           eb0 = vlib_get_buffer (VM, ebi0);                                    \
 521           if (PREDICT_FALSE (eb0 == 0))                                        \
 522             goto NO_BUFFER1;                                                   \
 523           ip_len0 =                                                            \
 524             ip_len0 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len0;     \
 525           ip_len1 =                                                            \
 526             ip_len1 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len1;     \
 527           copy3cachelines (eb0->data + eb0->current_length, ip0, ip_len0);     \
 528           FIXUP_FUNC(eb0, p0);                                                 \
 529           eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
 530           my_buf->records_in_this_buffer++;                                    \
 531           if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
 532             {                                                                  \
 533               ioam_export_send_buffer (EM, VM, my_buf);                        \
 534               ioam_export_init_buffer (EM, VM, my_buf);                        \
 535             }                                                                  \
 536           ebi0 = my_buf->buffer_index;                                         \
 537           eb0 = vlib_get_buffer (VM, ebi0);                                    \
 538           if (PREDICT_FALSE (eb0 == 0))                                        \
 539             goto NO_BUFFER1;                                                   \
 540           copy3cachelines (eb0->data + eb0->current_length, ip1, ip_len1);     \
 541           FIXUP_FUNC(eb0, p1);                                                 \
 542           eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
 543           my_buf->records_in_this_buffer++;                                    \
 544           if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
 545             {                                                                  \
 546               ioam_export_send_buffer (EM, VM, my_buf);                        \
 547               ioam_export_init_buffer (EM, VM, my_buf);                        \
 548             }                                                                  \
 549           pkts_recorded += 2;                                                  \
 550           if (PREDICT_FALSE (((node)->flags & VLIB_NODE_FLAG_TRACE)))          \
 551             {                                                                  \
 552               if (p0->flags & VLIB_BUFFER_IS_TRACED)                           \
 553                 {                                                              \
 554                   export_trace_t *t =                                          \
 555                     vlib_add_trace (VM, node, p0, sizeof (*t));                \
 556                   t->flow_label =                                              \
 557                     clib_net_to_host_u32 (ip0->V);                             \
 558                   t->next_index = next0;                                       \
 559                 }                                                              \
 560               if (p1->flags & VLIB_BUFFER_IS_TRACED)                           \
 561                 {                                                              \
 562                   export_trace_t *t =                                          \
 563                     vlib_add_trace (VM, N, p1, sizeof (*t));                   \
 564                   t->flow_label =                                              \
 565                     clib_net_to_host_u32 (ip1->V);                             \
 566                   t->next_index = next1;                                       \
 567                 }                                                              \
 568             }                                                                  \
 569         NO_BUFFER1:                                                            \
 570           vlib_validate_buffer_enqueue_x2 (VM, N, next_index,                  \
 571                                            to_next, n_left_to_next,            \
 572                                            bi0, bi1, next0, next1);            \
 573         }                                                                      \
 574       while (n_left_from > 0 && n_left_to_next > 0)                            \
 575         {                                                                      \
 576           u32 bi0;                                                             \
 577           vlib_buffer_t *p0;                                                   \
 578           u32 next0 = NEXT;                                                    \
 579           HTYPE *ip0;                                                          \
 580           u32 ip_len0;                                                         \
 581           bi0 = from[0];                                                       \
 582           to_next[0] = bi0;                                                    \
 583           from += 1;                                                           \
 584           to_next += 1;                                                        \
 585           n_left_from -= 1;                                                    \
 586           n_left_to_next -= 1;                                                 \
 587           p0 = vlib_get_buffer (VM, bi0);                                      \
 588           ip0 = vlib_buffer_get_current (p0);                                  \
 589           ip_len0 =                                                            \
 590             clib_net_to_host_u16 (ip0->L) + sizeof (HTYPE);                    \
 591           ebi0 = my_buf->buffer_index;                                         \
 592           eb0 = vlib_get_buffer (VM, ebi0);                                    \
 593           if (PREDICT_FALSE (eb0 == 0))                                        \
 594             goto NO_BUFFER;                                                    \
 595           ip_len0 =                                                            \
 596             ip_len0 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len0;     \
 597           copy3cachelines (eb0->data + eb0->current_length, ip0, ip_len0);     \
 598           FIXUP_FUNC(eb0, p0);                                                 \
 599           eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
 600           my_buf->records_in_this_buffer++;                                    \
 601           if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
 602             {                                                                  \
 603               ioam_export_send_buffer (EM, VM, my_buf);                        \
 604               ioam_export_init_buffer (EM, VM, my_buf);                        \
 605             }                                                                  \
 606           if (PREDICT_FALSE (((N)->flags & VLIB_NODE_FLAG_TRACE)               \
 607                              && (p0->flags & VLIB_BUFFER_IS_TRACED)))          \
 608             {                                                                  \
 609               export_trace_t *t = vlib_add_trace (VM, (N), p0, sizeof (*t));   \
 610               t->flow_label =                                                  \
 611                 clib_net_to_host_u32 (ip0->V);                                 \
 612               t->next_index = next0;                                           \
 613             }                                                                  \
 614           pkts_recorded += 1;                                                  \
 615         NO_BUFFER:                                                             \
 616           vlib_validate_buffer_enqueue_x1 (VM, N, next_index,                  \
 617                                            to_next, n_left_to_next,            \
 618                                            bi0, next0);                        \
 619         }                                                                      \
 620       vlib_put_next_frame (VM, N, next_index, n_left_to_next);                 \
 621     }                                                                          \
 622   vlib_node_increment_counter (VM, export_node.index,                          \
 623                                EXPORT_ERROR_RECORDED, pkts_recorded);          \
 624   clib_spinlock_unlock (&(EM)->lockp[(VM)->thread_index]);                     \
 625 } while(0)
 626
 627 #endif /* __included_ioam_export_h__ */
 628
 629 /*
 630  * fd.io coding-style-patch-verification: ON
 631  *
 632  * Local Variables:
 633  * eval: (c-set-style "gnu")
 634  * End:
 635  */