plugins/ioam-plugin/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/udp.h>
  24 #include <vnet/flow/ipfix_packet.h>
  25
  26 #include <vppinfra/pool.h>
  27 #include <vppinfra/hash.h>
  28 #include <vppinfra/error.h>
  29 #include <vppinfra/elog.h>
  30
  31 #include <vlib/threads.h>
  32
  33 typedef struct ioam_export_buffer
  34 {
  35   /* Allocated buffer */
  36   u32 buffer_index;
  37   u64 touched_at;
  38   u8 records_in_this_buffer;
  39 } ioam_export_buffer_t;
  40
  41
  42 typedef struct
  43 {
  44   /* API message ID base */
  45   u16 msg_id_base;
  46
  47   /* TODO: to support multiple collectors all this has to be grouped and create a vector here */
  48   u8 *record_header;
  49   u32 sequence_number;
  50   u32 domain_id;
  51
  52   /* ipfix collector, our ip address */
  53   ip4_address_t ipfix_collector;
  54   ip4_address_t src_address;
  55
  56   /* Pool of ioam_export_buffer_t */
  57   ioam_export_buffer_t *buffer_pool;
  58   /* Vector of per thread ioam_export_buffer_t to buffer pool index */
  59   u32 *buffer_per_thread;
  60   /* Lock per thread to swap buffers between worker and timer process */
  61   volatile u32 **lockp;
  62
  63   /* time scale transform */
  64   u32 unix_time_0;
  65   f64 vlib_time_0;
  66
  67   /* convenience */
  68   vlib_main_t *vlib_main;
  69   vnet_main_t *vnet_main;
  70   u32 ip4_lookup_node_index;
  71
  72   uword my_hbh_slot;
  73   u32 export_process_node_index;
  74 } ioam_export_main_t;
  75
  76 ioam_export_main_t ioam_export_main;
  77 ioam_export_main_t vxlan_gpe_ioam_export_main;
  78
  79 vlib_node_registration_t export_node;
  80
  81 #define DEFAULT_EXPORT_SIZE (3 * CLIB_CACHE_LINE_BYTES)
  82 /*
  83  *  Number of records in a buffer
  84  * ~(MTU (1500) - [ip hdr(40) + UDP(8) + ipfix (24)]) / DEFAULT_EXPORT_SIZE
  85  */
  86 #define DEFAULT_EXPORT_RECORDS 7
  87
  88 always_inline ioam_export_buffer_t *
  89 ioam_export_get_my_buffer (ioam_export_main_t * em, u32 thread_id)
  90 {
  91
  92   if (vec_len (em->buffer_per_thread) > thread_id)
  93     return (pool_elt_at_index
  94             (em->buffer_pool, em->buffer_per_thread[thread_id]));
  95   return (0);
  96 }
  97
  98 inline static int
  99 ioam_export_buffer_add_header (ioam_export_main_t * em, vlib_buffer_t * b0)
 100 {
 101   clib_memcpy (b0->data, em->record_header, vec_len (em->record_header));
 102   b0->current_data = 0;
 103   b0->current_length = vec_len (em->record_header);
 104   b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 105   return (1);
 106 }
 107
 108 inline static int
 109 ioam_export_init_buffer (ioam_export_main_t * em, vlib_main_t * vm,
 110                          ioam_export_buffer_t * eb)
 111 {
 112   vlib_buffer_t *b = 0;
 113
 114   if (!eb)
 115     return (-1);
 116   /* TODO: Perhaps buffer init from template here */
 117   if (vlib_buffer_alloc (vm, &(eb->buffer_index), 1) != 1)
 118     return (-2);
 119   eb->records_in_this_buffer = 0;
 120   eb->touched_at = vlib_time_now (vm);
 121   b = vlib_get_buffer (vm, eb->buffer_index);
 122   (void) ioam_export_buffer_add_header (em, b);
 123   vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
 124   vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
 125   return (1);
 126 }
 127
 128 inline static void
 129 ioam_export_thread_buffer_free (ioam_export_main_t * em)
 130 {
 131   vlib_main_t *vm = em->vlib_main;
 132   ioam_export_buffer_t *eb = 0;
 133   int i;
 134   for (i = 0; i < vec_len (em->buffer_per_thread); i++)
 135     {
 136       eb = pool_elt_at_index (em->buffer_pool, em->buffer_per_thread[i]);
 137       if (eb)
 138         vlib_buffer_free (vm, &(eb->buffer_index), 1);
 139     }
 140   for (i = 0; i < vec_len (em->lockp); i++)
 141     clib_mem_free ((void *) em->lockp[i]);
 142   vec_free (em->buffer_per_thread);
 143   pool_free (em->buffer_pool);
 144   vec_free (em->lockp);
 145   em->buffer_per_thread = 0;
 146   em->buffer_pool = 0;
 147   em->lockp = 0;
 148 }
 149
 150 inline static int
 151 ioam_export_thread_buffer_init (ioam_export_main_t * em, vlib_main_t * vm)
 152 {
 153   int no_of_threads = vec_len (vlib_worker_threads);
 154   int i;
 155   ioam_export_buffer_t *eb = 0;
 156   vlib_node_t *ip4_lookup_node;
 157
 158   pool_alloc_aligned (em->buffer_pool,
 159                       no_of_threads - 1, CLIB_CACHE_LINE_BYTES);
 160   vec_validate_aligned (em->buffer_per_thread,
 161                         no_of_threads - 1, CLIB_CACHE_LINE_BYTES);
 162   vec_validate_aligned (em->lockp, no_of_threads - 1, CLIB_CACHE_LINE_BYTES);
 163   ip4_lookup_node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup");
 164   em->ip4_lookup_node_index = ip4_lookup_node->index;
 165   if (!em->buffer_per_thread || !em->buffer_pool || !em->lockp)
 166     {
 167       return (-1);
 168     }
 169   for (i = 0; i < no_of_threads; i++)
 170     {
 171       eb = 0;
 172       pool_get_aligned (em->buffer_pool, eb, CLIB_CACHE_LINE_BYTES);
 173       memset (eb, 0, sizeof (*eb));
 174       em->buffer_per_thread[i] = eb - em->buffer_pool;
 175       if (ioam_export_init_buffer (em, vm, eb) != 1)
 176         {
 177           ioam_export_thread_buffer_free (em);
 178           return (-2);
 179         }
 180       em->lockp[i] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
 181                                              CLIB_CACHE_LINE_BYTES);
 182       memset ((void *) em->lockp[i], 0, CLIB_CACHE_LINE_BYTES);
 183     }
 184   return (1);
 185 }
 186
 187 #define IPFIX_IOAM_EXPORT_ID 272
 188
 189 /* Used to build the rewrite */
 190 /* data set packet */
 191 typedef struct
 192 {
 193   ipfix_message_header_t h;
 194   ipfix_set_header_t s;
 195 } ipfix_data_packet_t;
 196
 197 typedef struct
 198 {
 199   ip4_header_t ip4;
 200   udp_header_t udp;
 201   ipfix_data_packet_t ipfix;
 202 } ip4_ipfix_data_packet_t;
 203
 204
 205 inline static void
 206 ioam_export_header_cleanup (ioam_export_main_t * em,
 207                             ip4_address_t * collector_address,
 208                             ip4_address_t * src_address)
 209 {
 210   vec_free (em->record_header);
 211   em->record_header = 0;
 212 }
 213
 214 inline static int
 215 ioam_export_header_create (ioam_export_main_t * em,
 216                            ip4_address_t * collector_address,
 217                            ip4_address_t * src_address)
 218 {
 219   ip4_header_t *ip;
 220   udp_header_t *udp;
 221   ipfix_message_header_t *h;
 222   ipfix_set_header_t *s;
 223   u8 *rewrite = 0;
 224   ip4_ipfix_data_packet_t *tp;
 225
 226
 227   /* allocate rewrite space */
 228   vec_validate_aligned (rewrite,
 229                         sizeof (ip4_ipfix_data_packet_t) - 1,
 230                         CLIB_CACHE_LINE_BYTES);
 231
 232   tp = (ip4_ipfix_data_packet_t *) rewrite;
 233   ip = (ip4_header_t *) & tp->ip4;
 234   udp = (udp_header_t *) (ip + 1);
 235   h = (ipfix_message_header_t *) (udp + 1);
 236   s = (ipfix_set_header_t *) (h + 1);
 237
 238   ip->ip_version_and_header_length = 0x45;
 239   ip->ttl = 254;
 240   ip->protocol = IP_PROTOCOL_UDP;
 241   ip->src_address.as_u32 = src_address->as_u32;
 242   ip->dst_address.as_u32 = collector_address->as_u32;
 243   udp->src_port = clib_host_to_net_u16 (4939 /* $$FIXME */ );
 244   udp->dst_port = clib_host_to_net_u16 (4939);
 245   /* FIXUP: UDP length */
 246   udp->length = clib_host_to_net_u16 (vec_len (rewrite) +
 247                                       (DEFAULT_EXPORT_RECORDS *
 248                                        DEFAULT_EXPORT_SIZE) - sizeof (*ip));
 249
 250   /* FIXUP: message header export_time */
 251   /* FIXUP: message header sequence_number */
 252   h->domain_id = clib_host_to_net_u32 (em->domain_id);
 253
 254   /*FIXUP: Setid length in octets if records exported are not default */
 255   s->set_id_length = ipfix_set_id_length (IPFIX_IOAM_EXPORT_ID,
 256                                           (sizeof (*s) +
 257                                            (DEFAULT_EXPORT_RECORDS *
 258                                             DEFAULT_EXPORT_SIZE)));
 259
 260   /* FIXUP: h version and length length in octets if records exported are not default */
 261   h->version_length = version_length (sizeof (*h) +
 262                                       (sizeof (*s) +
 263                                        (DEFAULT_EXPORT_RECORDS *
 264                                         DEFAULT_EXPORT_SIZE)));
 265
 266   /* FIXUP: ip length if records exported are not default */
 267   /* FIXUP: ip checksum if records exported are not default */
 268   ip->length = clib_host_to_net_u16 (vec_len (rewrite) +
 269                                      (DEFAULT_EXPORT_RECORDS *
 270                                       DEFAULT_EXPORT_SIZE));
 271   ip->checksum = ip4_header_checksum (ip);
 272   _vec_len (rewrite) = sizeof (ip4_ipfix_data_packet_t);
 273   em->record_header = rewrite;
 274   return (1);
 275 }
 276
 277 inline static int
 278 ioam_export_send_buffer (ioam_export_main_t * em, vlib_main_t * vm,
 279                          ioam_export_buffer_t * eb)
 280 {
 281   ip4_header_t *ip;
 282   udp_header_t *udp;
 283   ipfix_message_header_t *h;
 284   ipfix_set_header_t *s;
 285   ip4_ipfix_data_packet_t *tp;
 286   vlib_buffer_t *b0;
 287   u16 new_l0, old_l0;
 288   ip_csum_t sum0;
 289   vlib_frame_t *nf = 0;
 290   u32 *to_next;
 291
 292   b0 = vlib_get_buffer (vm, eb->buffer_index);
 293   tp = vlib_buffer_get_current (b0);
 294   ip = (ip4_header_t *) & tp->ip4;
 295   udp = (udp_header_t *) (ip + 1);
 296   h = (ipfix_message_header_t *) (udp + 1);
 297   s = (ipfix_set_header_t *) (h + 1);
 298
 299   /* FIXUP: message header export_time */
 300   h->export_time = clib_host_to_net_u32 ((u32)
 301                                          (((f64) em->unix_time_0) +
 302                                           (vlib_time_now (em->vlib_main) -
 303                                            em->vlib_time_0)));
 304
 305   /* FIXUP: message header sequence_number */
 306   h->sequence_number = clib_host_to_net_u32 (em->sequence_number++);
 307
 308   /* FIXUP: lengths if different from default */
 309   if (PREDICT_FALSE (eb->records_in_this_buffer != DEFAULT_EXPORT_RECORDS))
 310     {
 311       s->set_id_length =
 312         ipfix_set_id_length (IPFIX_IOAM_EXPORT_ID /* set_id */ ,
 313                              b0->current_length - (sizeof (*ip) +
 314                                                    sizeof (*udp) +
 315                                                    sizeof (*h)));
 316       h->version_length =
 317         version_length (b0->current_length - (sizeof (*ip) + sizeof (*udp)));
 318       sum0 = ip->checksum;
 319       old_l0 = ip->length;
 320       new_l0 = clib_host_to_net_u16 ((u16) b0->current_length);
 321       sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
 322                              length /* changed member */ );
 323       ip->checksum = ip_csum_fold (sum0);
 324       ip->length = new_l0;
 325       udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
 326     }
 327
 328   /* Enqueue pkts to ip4-lookup */
 329
 330   nf = vlib_get_frame_to_node (vm, em->ip4_lookup_node_index);
 331   nf->n_vectors = 0;
 332   to_next = vlib_frame_vector_args (nf);
 333   nf->n_vectors = 1;
 334   to_next[0] = eb->buffer_index;
 335   vlib_put_frame_to_node (vm, em->ip4_lookup_node_index, nf);
 336   return (1);
 337
 338 }
 339
 340 #define EXPORT_TIMEOUT (20.0)
 341 #define THREAD_PERIOD (30.0)
 342 inline static uword
 343 ioam_export_process_common (ioam_export_main_t * em, vlib_main_t * vm,
 344                             vlib_node_runtime_t * rt, vlib_frame_t * f,
 345                             u32 index)
 346 {
 347   f64 now;
 348   f64 timeout = 30.0;
 349   uword event_type;
 350   uword *event_data = 0;
 351   int i;
 352   ioam_export_buffer_t *eb = 0, *new_eb = 0;
 353   u32 *vec_buffer_indices = 0;
 354   u32 *vec_buffer_to_be_sent = 0;
 355   u32 *thread_index = 0;
 356   u32 new_pool_index = 0;
 357
 358   em->export_process_node_index = index;
 359   /* Wait for Godot... */
 360   vlib_process_wait_for_event_or_clock (vm, 1e9);
 361   event_type = vlib_process_get_events (vm, &event_data);
 362   if (event_type != 1)
 363     clib_warning ("bogus kickoff event received, %d", event_type);
 364   vec_reset_length (event_data);
 365
 366   while (1)
 367     {
 368       vlib_process_wait_for_event_or_clock (vm, timeout);
 369       event_type = vlib_process_get_events (vm, &event_data);
 370       switch (event_type)
 371         {
 372         case 2:         /* Stop and Wait for kickoff again */
 373           timeout = 1e9;
 374           break;
 375         case 1:         /* kickoff : Check for unsent buffers */
 376           timeout = THREAD_PERIOD;
 377           break;
 378         case ~0:                /* timeout */
 379           break;
 380         }
 381       vec_reset_length (event_data);
 382       now = vlib_time_now (vm);
 383       /*
 384        * Create buffers for threads that are not active enough
 385        * to send out the export records
 386        */
 387       for (i = 0; i < vec_len (em->buffer_per_thread); i++)
 388         {
 389           /* If the worker thread is processing export records ignore further checks */
 390           if (*em->lockp[i] == 1)
 391             continue;
 392           eb = pool_elt_at_index (em->buffer_pool, em->buffer_per_thread[i]);
 393           if (eb->records_in_this_buffer > 0
 394               && now > (eb->touched_at + EXPORT_TIMEOUT))
 395             {
 396               pool_get_aligned (em->buffer_pool, new_eb,
 397                                 CLIB_CACHE_LINE_BYTES);
 398               memset (new_eb, 0, sizeof (*new_eb));
 399               if (ioam_export_init_buffer (em, vm, new_eb) == 1)
 400                 {
 401                   new_pool_index = new_eb - em->buffer_pool;
 402                   vec_add (vec_buffer_indices, &new_pool_index, 1);
 403                   vec_add (vec_buffer_to_be_sent, &em->buffer_per_thread[i],
 404                            1);
 405                   vec_add (thread_index, &i, 1);
 406                 }
 407               else
 408                 {
 409                   pool_put (em->buffer_pool, new_eb);
 410                   /*Give up */
 411                   goto CLEANUP;
 412                 }
 413             }
 414         }
 415       if (vec_len (thread_index) != 0)
 416         {
 417           /*
 418            * Now swap the buffers out
 419            */
 420           for (i = 0; i < vec_len (thread_index); i++)
 421             {
 422               while (__sync_lock_test_and_set (em->lockp[thread_index[i]], 1))
 423                 ;
 424               em->buffer_per_thread[thread_index[i]] =
 425                 vec_pop (vec_buffer_indices);
 426               *em->lockp[thread_index[i]] = 0;
 427             }
 428
 429           /* Send the buffers */
 430           for (i = 0; i < vec_len (vec_buffer_to_be_sent); i++)
 431             {
 432               eb =
 433                 pool_elt_at_index (em->buffer_pool, vec_buffer_to_be_sent[i]);
 434               ioam_export_send_buffer (em, vm, eb);
 435               pool_put (em->buffer_pool, eb);
 436             }
 437         }
 438
 439     CLEANUP:
 440       /* Free any leftover/unused buffers and everything that was allocated */
 441       for (i = 0; i < vec_len (vec_buffer_indices); i++)
 442         {
 443           new_eb = pool_elt_at_index (em->buffer_pool, vec_buffer_indices[i]);
 444           vlib_buffer_free (vm, &new_eb->buffer_index, 1);
 445           pool_put (em->buffer_pool, new_eb);
 446         }
 447       vec_free (vec_buffer_indices);
 448       vec_free (vec_buffer_to_be_sent);
 449       vec_free (thread_index);
 450     }
 451   return 0;                     /* not so much */
 452 }
 453
 454 #define ioam_export_node_common(EM, VM, N, F, HTYPE, L, V, NEXT)               \
 455 do {                                                                           \
 456   u32 n_left_from, *from, *to_next;                                            \
 457   export_next_t next_index;                                                    \
 458   u32 pkts_recorded = 0;                                                       \
 459   ioam_export_buffer_t *my_buf = 0;                                            \
 460   vlib_buffer_t *eb0 = 0;                                                      \
 461   u32 ebi0 = 0;                                                                \
 462   from = vlib_frame_vector_args (F);                                           \
 463   n_left_from = (F)->n_vectors;                                                \
 464   next_index = (N)->cached_next_index;                                         \
 465   while (__sync_lock_test_and_set ((EM)->lockp[(VM)->cpu_index], 1));          \
 466   my_buf = ioam_export_get_my_buffer (EM, (VM)->cpu_index);                    \
 467   my_buf->touched_at = vlib_time_now (VM);                                     \
 468   while (n_left_from > 0)                                                      \
 469     {                                                                          \
 470       u32 n_left_to_next;                                                      \
 471       vlib_get_next_frame (VM, N, next_index, to_next, n_left_to_next);        \
 472       while (n_left_from >= 4 && n_left_to_next >= 2)                          \
 473         {                                                                      \
 474           u32 next0 = NEXT;                                                    \
 475           u32 next1 = NEXT;                                                    \
 476           u32 bi0, bi1;                                                        \
 477           HTYPE *ip0, *ip1;                                                    \
 478           vlib_buffer_t *p0, *p1;                                              \
 479           u32 ip_len0, ip_len1;                                                \
 480           {                                                                    \
 481             vlib_buffer_t *p2, *p3;                                            \
 482             p2 = vlib_get_buffer (VM, from[2]);                                \
 483             p3 = vlib_get_buffer (VM, from[3]);                                \
 484             vlib_prefetch_buffer_header (p2, LOAD);                            \
 485             vlib_prefetch_buffer_header (p3, LOAD);                            \
 486             CLIB_PREFETCH (p2->data, 3 * CLIB_CACHE_LINE_BYTES, LOAD);         \
 487             CLIB_PREFETCH (p3->data, 3 * CLIB_CACHE_LINE_BYTES, LOAD);         \
 488           }                                                                    \
 489           to_next[0] = bi0 = from[0];                                          \
 490           to_next[1] = bi1 = from[1];                                          \
 491           from += 2;                                                           \
 492           to_next += 2;                                                        \
 493           n_left_from -= 2;                                                    \
 494           n_left_to_next -= 2;                                                 \
 495           p0 = vlib_get_buffer (VM, bi0);                                      \
 496           p1 = vlib_get_buffer (VM, bi1);                                      \
 497           ip0 = vlib_buffer_get_current (p0);                                  \
 498           ip1 = vlib_buffer_get_current (p1);                                  \
 499           ip_len0 =                                                            \
 500             clib_net_to_host_u16 (ip0->L) + sizeof (HTYPE);                    \
 501           ip_len1 =                                                            \
 502             clib_net_to_host_u16 (ip1->L) + sizeof (HTYPE);                    \
 503           ebi0 = my_buf->buffer_index;                                         \
 504           eb0 = vlib_get_buffer (VM, ebi0);                                    \
 505           if (PREDICT_FALSE (eb0 == 0))                                        \
 506             goto NO_BUFFER1;                                                   \
 507           ip_len0 =                                                            \
 508             ip_len0 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len0;     \
 509           ip_len1 =                                                            \
 510             ip_len1 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len1;     \
 511           copy3cachelines (eb0->data + eb0->current_length, ip0, ip_len0);     \
 512           eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
 513           my_buf->records_in_this_buffer++;                                    \
 514           if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
 515             {                                                                  \
 516               ioam_export_send_buffer (EM, VM, my_buf);                        \
 517               ioam_export_init_buffer (EM, VM, my_buf);                        \
 518             }                                                                  \
 519           ebi0 = my_buf->buffer_index;                                         \
 520           eb0 = vlib_get_buffer (VM, ebi0);                                    \
 521           if (PREDICT_FALSE (eb0 == 0))                                        \
 522             goto NO_BUFFER1;                                                   \
 523           copy3cachelines (eb0->data + eb0->current_length, ip1, ip_len1);     \
 524           eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
 525           my_buf->records_in_this_buffer++;                                    \
 526           if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
 527             {                                                                  \
 528               ioam_export_send_buffer (EM, VM, my_buf);                        \
 529               ioam_export_init_buffer (EM, VM, my_buf);                        \
 530             }                                                                  \
 531           pkts_recorded += 2;                                                  \
 532           if (PREDICT_FALSE (((node)->flags & VLIB_NODE_FLAG_TRACE)))          \
 533             {                                                                  \
 534               if (p0->flags & VLIB_BUFFER_IS_TRACED)                           \
 535                 {                                                              \
 536                   export_trace_t *t =                                          \
 537                     vlib_add_trace (VM, node, p0, sizeof (*t));                \
 538                   t->flow_label =                                              \
 539                     clib_net_to_host_u32 (ip0->V);                             \
 540                   t->next_index = next0;                                       \
 541                 }                                                              \
 542               if (p1->flags & VLIB_BUFFER_IS_TRACED)                           \
 543                 {                                                              \
 544                   export_trace_t *t =                                          \
 545                     vlib_add_trace (VM, N, p1, sizeof (*t));                   \
 546                   t->flow_label =                                              \
 547                     clib_net_to_host_u32 (ip1->V);                             \
 548                   t->next_index = next1;                                       \
 549                 }                                                              \
 550             }                                                                  \
 551         NO_BUFFER1:                                                            \
 552           vlib_validate_buffer_enqueue_x2 (VM, N, next_index,                  \
 553                                            to_next, n_left_to_next,            \
 554                                            bi0, bi1, next0, next1);            \
 555         }                                                                      \
 556       while (n_left_from > 0 && n_left_to_next > 0)                            \
 557         {                                                                      \
 558           u32 bi0;                                                             \
 559           vlib_buffer_t *p0;                                                   \
 560           u32 next0 = NEXT;                                                    \
 561           HTYPE *ip0;                                                          \
 562           u32 ip_len0;                                                         \
 563           bi0 = from[0];                                                       \
 564           to_next[0] = bi0;                                                    \
 565           from += 1;                                                           \
 566           to_next += 1;                                                        \
 567           n_left_from -= 1;                                                    \
 568           n_left_to_next -= 1;                                                 \
 569           p0 = vlib_get_buffer (VM, bi0);                                      \
 570           ip0 = vlib_buffer_get_current (p0);                                  \
 571           ip_len0 =                                                            \
 572             clib_net_to_host_u16 (ip0->L) + sizeof (HTYPE);                    \
 573           ebi0 = my_buf->buffer_index;                                         \
 574           eb0 = vlib_get_buffer (VM, ebi0);                                    \
 575           if (PREDICT_FALSE (eb0 == 0))                                        \
 576             goto NO_BUFFER;                                                    \
 577           ip_len0 =                                                            \
 578             ip_len0 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len0;     \
 579           copy3cachelines (eb0->data + eb0->current_length, ip0, ip_len0);     \
 580           eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
 581           my_buf->records_in_this_buffer++;                                    \
 582           if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
 583             {                                                                  \
 584               ioam_export_send_buffer (EM, VM, my_buf);                        \
 585               ioam_export_init_buffer (EM, VM, my_buf);                        \
 586             }                                                                  \
 587           if (PREDICT_FALSE (((N)->flags & VLIB_NODE_FLAG_TRACE)               \
 588                              && (p0->flags & VLIB_BUFFER_IS_TRACED)))          \
 589             {                                                                  \
 590               export_trace_t *t = vlib_add_trace (VM, (N), p0, sizeof (*t));   \
 591               t->flow_label =                                                  \
 592                 clib_net_to_host_u32 (ip0->V);                                 \
 593               t->next_index = next0;                                           \
 594             }                                                                  \
 595           pkts_recorded += 1;                                                  \
 596         NO_BUFFER:                                                             \
 597           vlib_validate_buffer_enqueue_x1 (VM, N, next_index,                  \
 598                                            to_next, n_left_to_next,            \
 599                                            bi0, next0);                        \
 600         }                                                                      \
 601       vlib_put_next_frame (VM, N, next_index, n_left_to_next);                 \
 602     }                                                                          \
 603   vlib_node_increment_counter (VM, export_node.index,                          \
 604                                EXPORT_ERROR_RECORDED, pkts_recorded);          \
 605   *(EM)->lockp[(VM)->cpu_index] = 0;                                           \
 606 } while(0)
 607
 608 #endif /* __included_ioam_export_h__ */
 609
 610 /*
 611  * fd.io coding-style-patch-verification: ON
 612  *
 613  * Local Variables:
 614  * eval: (c-set-style "gnu")
 615  * End:
 616  */