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