FD.io VPP  v19.08.3-2-gbabecb413
Vector Packet Processing
api_shared.c
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1 /*
2  *------------------------------------------------------------------
3  * api_shared.c - API message handling, common code for both clients
4  * and the vlib process itself.
5  *
6  *
7  * Copyright (c) 2009 Cisco and/or its affiliates.
8  * Licensed under the Apache License, Version 2.0 (the "License");
9  * you may not use this file except in compliance with the License.
10  * You may obtain a copy of the License at:
11  *
12  * http://www.apache.org/licenses/LICENSE-2.0
13  *
14  * Unless required by applicable law or agreed to in writing, software
15  * distributed under the License is distributed on an "AS IS" BASIS,
16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17  * See the License for the specific language governing permissions and
18  * limitations under the License.
19  *------------------------------------------------------------------
20  */
21 
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <stddef.h>
25 #include <string.h>
26 #include <vppinfra/format.h>
27 #include <vppinfra/byte_order.h>
28 #include <vppinfra/error.h>
29 #include <vlib/vlib.h>
30 #include <vlib/unix/unix.h>
31 #include <vlibapi/api.h>
32 #include <vppinfra/elog.h>
33 
34 /* *INDENT-OFF* */
35 api_main_t api_main =
36  {
37  .region_name = "/unset",
38  .api_uid = -1,
39  .api_gid = -1,
40  };
41 /* *INDENT-ON* */
42 
43 void
45 {
46  api_main_t *am = &api_main;
47  am->missing_clients++;
48 }
49 
50 int
52 {
53  return (am->rx_trace && am->rx_trace->enabled);
54 }
55 
56 int
58 {
59  return (am->tx_trace && am->tx_trace->enabled);
60 }
61 
62 /*
63  * vl_msg_api_trace
64  */
65 void
67 {
68  u8 **this_trace;
69  u8 **old_trace;
70  u8 *msg_copy;
71  u32 length;
72  trace_cfg_t *cfgp;
73  u16 msg_id = clib_net_to_host_u16 (*((u16 *) msg));
74  msgbuf_t *header = (msgbuf_t *) (((u8 *) msg) - offsetof (msgbuf_t, data));
75 
76  cfgp = am->api_trace_cfg + msg_id;
77 
78  if (!cfgp || !cfgp->trace_enable)
79  return;
80 
81  msg_copy = 0;
82 
83  if (tp->nitems == 0)
84  {
85  clib_warning ("tp->nitems is 0");
86  return;
87  }
88 
89  if (vec_len (tp->traces) < tp->nitems)
90  {
91  vec_add1 (tp->traces, 0);
92  this_trace = tp->traces + vec_len (tp->traces) - 1;
93  }
94  else
95  {
96  tp->wrapped = 1;
97  old_trace = tp->traces + tp->curindex++;
98  if (tp->curindex == tp->nitems)
99  tp->curindex = 0;
100  /* Reuse the trace record, may save some memory allocator traffic */
101  msg_copy = *old_trace;
102  vec_reset_length (msg_copy);
103  this_trace = old_trace;
104  }
105 
106  length = clib_net_to_host_u32 (header->data_len);
107 
108  vec_validate (msg_copy, length - 1);
109  clib_memcpy_fast (msg_copy, msg, length);
110  *this_trace = msg_copy;
111 }
112 
113 int
115  int onoff)
116 {
117  vl_api_trace_t *tp;
118  int rv;
119 
120  switch (which)
121  {
122  case VL_API_TRACE_TX:
123  tp = am->tx_trace;
124  if (tp == 0)
125  {
126  vl_msg_api_trace_configure (am, which, 1024);
127  tp = am->tx_trace;
128  }
129  break;
130 
131  case VL_API_TRACE_RX:
132  tp = am->rx_trace;
133  if (tp == 0)
134  {
135  vl_msg_api_trace_configure (am, which, 1024);
136  tp = am->rx_trace;
137  }
138  break;
139 
140  default:
141  /* duh? */
142  return -1;
143  }
144 
145  /* Configured? */
146  if (tp == 0 || tp->nitems == 0)
147  return -1;
148 
149  rv = tp->enabled;
150  tp->enabled = onoff;
151 
152  return rv;
153 }
154 
155 int
157 {
158  vl_api_trace_t *tp;
159  int i;
160 
161  switch (which)
162  {
163  case VL_API_TRACE_TX:
164  tp = am->tx_trace;
165  break;
166 
167  case VL_API_TRACE_RX:
168  tp = am->rx_trace;
169  break;
170 
171  default:
172  /* duh? */
173  return -1;
174  }
175 
176  /* Configured? */
177  if (!tp || tp->nitems == 0)
178  return -1;
179 
180  tp->curindex = 0;
181  tp->wrapped = 0;
182 
183  for (i = 0; i < vec_len (tp->traces); i++)
184  {
185  vec_free (tp->traces[i]);
186  }
187  vec_free (tp->traces);
188 
189  return 0;
190 }
191 
192 u8 *
194 {
195  serialize_main_t _sm, *sm = &_sm;
196  hash_pair_t *hp;
198 
199  serialize_open_vector (sm, vector);
200 
201  /* serialize the count */
202  serialize_integer (sm, nmsg, sizeof (u32));
203 
204  /* *INDENT-OFF* */
206  ({
207  serialize_likely_small_unsigned_integer (sm, hp->value[0]);
208  serialize_cstring (sm, (char *) hp->key);
209  }));
210  /* *INDENT-ON* */
211 
212  return serialize_close_vector (sm);
213 }
214 
215 int
217 {
218  vl_api_trace_t *tp;
219  vl_api_trace_file_header_t fh;
220  int i;
221  u8 *msg;
222 
223  switch (which)
224  {
225  case VL_API_TRACE_TX:
226  tp = am->tx_trace;
227  break;
228 
229  case VL_API_TRACE_RX:
230  tp = am->rx_trace;
231  break;
232 
233  default:
234  /* duh? */
235  return -1;
236  }
237 
238  /* Configured, data present? */
239  if (tp == 0 || tp->nitems == 0 || vec_len (tp->traces) == 0)
240  return -1;
241 
242  /* "Dare to be stupid" check */
243  if (fp == 0)
244  {
245  return -2;
246  }
247 
248  /* Write the file header */
249  fh.wrapped = tp->wrapped;
250  fh.nitems = clib_host_to_net_u32 (vec_len (tp->traces));
251  u8 *m = vl_api_serialize_message_table (am, 0);
252  clib_warning ("Message table length %d", vec_len (m));
253  fh.msgtbl_size = clib_host_to_net_u32 (vec_len (m));
254 
255  if (fwrite (&fh, sizeof (fh), 1, fp) != 1)
256  {
257  return (-10);
258  }
259 
260  /* Write the message table */
261  if (fwrite (m, vec_len (m), 1, fp) != 1)
262  {
263  return (-14);
264  }
265  vec_free (m);
266 
267  /* No-wrap case */
268  if (tp->wrapped == 0)
269  {
270  /*
271  * Note: vec_len return 0 when fed a NULL pointer.
272  * Unfortunately, the static analysis tool doesn't
273  * figure it out, hence the suppressed warnings.
274  * What a great use of my time.
275  */
276  for (i = 0; i < vec_len (tp->traces); i++)
277  {
278  u32 msg_length;
279  /*sa_ignore NO_NULL_CHK */
280  msg = tp->traces[i];
281  /*
282  * This retarded check required to pass
283  * [sic] SA-checking.
284  */
285  if (!msg)
286  continue;
287 
288  msg_length = clib_host_to_net_u32 (vec_len (msg));
289  if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
290  != sizeof (msg_length))
291  {
292  return (-14);
293  }
294  if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
295  {
296  return (-11);
297  }
298  }
299  }
300  else
301  {
302  /* Wrap case: write oldest -> end of buffer */
303  for (i = tp->curindex; i < vec_len (tp->traces); i++)
304  {
305  u32 msg_length;
306  msg = tp->traces[i];
307  /*
308  * This retarded check required to pass
309  * [sic] SA-checking
310  */
311  if (!msg)
312  continue;
313 
314  msg_length = clib_host_to_net_u32 (vec_len (msg));
315  if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
316  != sizeof (msg_length))
317  {
318  return (-14);
319  }
320 
321  if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
322  {
323  return (-12);
324  }
325  }
326  /* write beginning of buffer -> oldest-1 */
327  for (i = 0; i < tp->curindex; i++)
328  {
329  u32 msg_length;
330  /*sa_ignore NO_NULL_CHK */
331  msg = tp->traces[i];
332  /*
333  * This retarded check required to pass
334  * [sic] SA-checking
335  */
336  if (!msg)
337  continue;
338 
339  msg_length = clib_host_to_net_u32 (vec_len (msg));
340  if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
341  != sizeof (msg_length))
342  {
343  return (-14);
344  }
345 
346  if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
347  {
348  return (-13);
349  }
350  }
351  }
352  return 0;
353 }
354 
355 int
357  u32 nitems)
358 {
359  vl_api_trace_t *tp;
360  int was_on = 0;
361 
362  switch (which)
363  {
364  case VL_API_TRACE_TX:
365  tp = am->tx_trace;
366  if (tp == 0)
367  {
368  vec_validate (am->tx_trace, 0);
369  tp = am->tx_trace;
370  }
371  break;
372 
373  case VL_API_TRACE_RX:
374  tp = am->rx_trace;
375  if (tp == 0)
376  {
377  vec_validate (am->rx_trace, 0);
378  tp = am->rx_trace;
379  }
380 
381  break;
382 
383  default:
384  return -1;
385 
386  }
387 
388  if (tp->enabled)
389  {
390  was_on = vl_msg_api_trace_onoff (am, which, 0);
391  }
392  if (tp->traces)
393  {
394  vl_msg_api_trace_free (am, which);
395  }
396 
397  clib_memset (tp, 0, sizeof (*tp));
398 
400  {
402  }
403  else
404  {
406  }
407 
408  tp->nitems = nitems;
409  if (was_on)
410  {
411  (void) vl_msg_api_trace_onoff (am, which, was_on);
412  }
413  return 0;
414 }
415 
416 void
418 {
419 }
420 
421 void
423 {
424 }
425 
426 always_inline void
428  void *the_msg, int trace_it, int do_it, int free_it)
429 {
430  u16 id = clib_net_to_host_u16 (*((u16 *) the_msg));
431  u8 *(*print_fp) (void *, void *);
432 
434  {
435  /* *INDENT-OFF* */
436  ELOG_TYPE_DECLARE (e) =
437  {
438  .format = "api-msg: %s",
439  .format_args = "T4",
440  };
441  /* *INDENT-ON* */
442  struct
443  {
444  u32 c;
445  } *ed;
446  ed = ELOG_DATA (am->elog_main, e);
447  if (id < vec_len (am->msg_names))
448  ed->c = elog_string (am->elog_main, (char *) am->msg_names[id]);
449  else
450  ed->c = elog_string (am->elog_main, "BOGUS");
451  }
452 
453  if (id < vec_len (am->msg_handlers) && am->msg_handlers[id])
454  {
455  if (trace_it)
456  vl_msg_api_trace (am, am->rx_trace, the_msg);
457 
458  if (am->msg_print_flag)
459  {
460  fformat (stdout, "[%d]: %s\n", id, am->msg_names[id]);
461  print_fp = (void *) am->msg_print_handlers[id];
462  if (print_fp == 0)
463  {
464  fformat (stdout, " [no registered print fn]\n");
465  }
466  else
467  {
468  (*print_fp) (the_msg, stdout);
469  }
470  }
471 
472  if (do_it)
473  {
474  if (!am->is_mp_safe[id])
475  {
478  }
479  (*am->msg_handlers[id]) (the_msg);
480  if (!am->is_mp_safe[id])
482  }
483  }
484  else
485  {
486  clib_warning ("no handler for msg id %d", id);
487  }
488 
489  if (free_it)
490  vl_msg_api_free (the_msg);
491 
493  {
494  /* *INDENT-OFF* */
495  ELOG_TYPE_DECLARE (e) =
496  {
497  .format = "api-msg-done(%s): %s",
498  .format_args = "t4T4",
499  .n_enum_strings = 2,
500  .enum_strings =
501  {
502  "barrier",
503  "mp-safe",
504  }
505  };
506  /* *INDENT-ON* */
507 
508  struct
509  {
510  u32 barrier;
511  u32 c;
512  } *ed;
513  ed = ELOG_DATA (am->elog_main, e);
514  if (id < vec_len (am->msg_names))
515  {
516  ed->c = elog_string (am->elog_main, (char *) am->msg_names[id]);
517  ed->barrier = !am->is_mp_safe[id];
518  }
519  else
520  {
521  ed->c = elog_string (am->elog_main, "BOGUS");
522  ed->barrier = 0;
523  }
524  }
525 }
526 
527 /* This is only to be called from a vlib/vnet app */
528 void
530  void *the_msg, vlib_main_t * vm,
531  vlib_node_runtime_t * node)
532 {
533  u16 id = clib_net_to_host_u16 (*((u16 *) the_msg));
534  u8 *(*handler) (void *, void *, void *);
535  u8 *(*print_fp) (void *, void *);
536  int is_mp_safe = 1;
537 
539  {
540  /* *INDENT-OFF* */
541  ELOG_TYPE_DECLARE (e) =
542  {
543  .format = "api-msg: %s",
544  .format_args = "T4",
545  };
546  /* *INDENT-ON* */
547  struct
548  {
549  u32 c;
550  } *ed;
551  ed = ELOG_DATA (am->elog_main, e);
552  if (id < vec_len (am->msg_names))
553  ed->c = elog_string (am->elog_main, (char *) am->msg_names[id]);
554  else
555  ed->c = elog_string (am->elog_main, "BOGUS");
556  }
557 
558  if (id < vec_len (am->msg_handlers) && am->msg_handlers[id])
559  {
560  handler = (void *) am->msg_handlers[id];
561 
562  if (PREDICT_FALSE (am->rx_trace && am->rx_trace->enabled))
563  vl_msg_api_trace (am, am->rx_trace, the_msg);
564 
565  if (PREDICT_FALSE (am->msg_print_flag))
566  {
567  fformat (stdout, "[%d]: %s\n", id, am->msg_names[id]);
568  print_fp = (void *) am->msg_print_handlers[id];
569  if (print_fp == 0)
570  {
571  fformat (stdout, " [no registered print fn for msg %d]\n", id);
572  }
573  else
574  {
575  (*print_fp) (the_msg, vm);
576  }
577  }
578  is_mp_safe = am->is_mp_safe[id];
579 
580  if (!is_mp_safe)
581  {
584  }
585  (*handler) (the_msg, vm, node);
586  if (!is_mp_safe)
588  }
589  else
590  {
591  clib_warning ("no handler for msg id %d", id);
592  }
593 
594  /*
595  * Special-case, so we can e.g. bounce messages off the vnet
596  * main thread without copying them...
597  */
598  if (id >= vec_len (am->message_bounce) || !(am->message_bounce[id]))
599  vl_msg_api_free (the_msg);
600 
602  {
603  /* *INDENT-OFF* */
604  ELOG_TYPE_DECLARE (e) =
605  {
606  .format = "api-msg-done(%s): %s",
607  .format_args = "t4T4",
608  .n_enum_strings = 2,
609  .enum_strings =
610  {
611  "barrier",
612  "mp-safe",
613  }
614  };
615  /* *INDENT-ON* */
616 
617  struct
618  {
619  u32 barrier;
620  u32 c;
621  } *ed;
622  ed = ELOG_DATA (am->elog_main, e);
623  if (id < vec_len (am->msg_names))
624  ed->c = elog_string (am->elog_main, (char *) am->msg_names[id]);
625  else
626  ed->c = elog_string (am->elog_main, "BOGUS");
627  ed->barrier = is_mp_safe;
628  }
629 }
630 
631 void
632 vl_msg_api_handler (void *the_msg)
633 {
634  api_main_t *am = &api_main;
635 
636  msg_handler_internal (am, the_msg,
637  (am->rx_trace
638  && am->rx_trace->enabled) /* trace_it */ ,
639  1 /* do_it */ , 1 /* free_it */ );
640 }
641 
642 void
644 {
645  api_main_t *am = &api_main;
646  msg_handler_internal (am, the_msg,
647  (am->rx_trace
648  && am->rx_trace->enabled) /* trace_it */ ,
649  1 /* do_it */ , 0 /* free_it */ );
650 }
651 
652 void
654 {
655  api_main_t *am = &api_main;
656  msg_handler_internal (am, the_msg, 0 /* trace_it */ , 1 /* do_it */ ,
657  0 /* free_it */ );
658 }
659 
660 /*
661  * Add a trace record to the API message trace buffer, if
662  * API message tracing is enabled. Handy for adding sufficient
663  * data to the trace to reproduce autonomous state, as opposed to
664  * state downloaded via control-plane API messages. Example: the NAT
665  * application creates database entries based on packet traffic, not
666  * control-plane messages.
667  *
668  */
669 void
670 vl_msg_api_trace_only (void *the_msg)
671 {
672  api_main_t *am = &api_main;
673 
674  msg_handler_internal (am, the_msg,
675  (am->rx_trace
676  && am->rx_trace->enabled) /* trace_it */ ,
677  0 /* do_it */ , 0 /* free_it */ );
678 }
679 
680 void
682 {
683  api_main_t *am = &api_main;
684  u16 id = clib_net_to_host_u16 (*((u16 *) the_msg));
685 
686  if (PREDICT_FALSE (id >= vec_len (am->msg_cleanup_handlers)))
687  {
688  clib_warning ("_vl_msg_id too large: %d\n", id);
689  return;
690  }
691  if (am->msg_cleanup_handlers[id])
692  (*am->msg_cleanup_handlers[id]) (the_msg);
693 
694  vl_msg_api_free (the_msg);
695 }
696 
697 /*
698  * vl_msg_api_replay_handler
699  */
700 void
702 {
703  api_main_t *am = &api_main;
704 
705  u16 id = clib_net_to_host_u16 (*((u16 *) the_msg));
706 
707  if (PREDICT_FALSE (id >= vec_len (am->msg_handlers)))
708  {
709  clib_warning ("_vl_msg_id too large: %d\n", id);
710  return;
711  }
712  /* do NOT trace the message... */
713  if (am->msg_handlers[id])
714  (*am->msg_handlers[id]) (the_msg);
715  /* do NOT free the message buffer... */
716 }
717 
718 u32
720 {
721  return vl_msg_api_get_msg_length_inline (msg_arg);
722 }
723 
724 /*
725  * vl_msg_api_socket_handler
726  */
727 void
729 {
730  api_main_t *am = &api_main;
731 
732  msg_handler_internal (am, the_msg,
733  (am->rx_trace
734  && am->rx_trace->enabled) /* trace_it */ ,
735  1 /* do_it */ , 0 /* free_it */ );
736 }
737 
738 #define foreach_msg_api_vector \
739 _(msg_names) \
740 _(msg_handlers) \
741 _(msg_cleanup_handlers) \
742 _(msg_endian_handlers) \
743 _(msg_print_handlers) \
744 _(api_trace_cfg) \
745 _(message_bounce) \
746 _(is_mp_safe)
747 
748 void
750 {
751  api_main_t *am = &api_main;
752 
753  /*
754  * This happens during the java core tests if the message
755  * dictionary is missing newly added xxx_reply_t messages.
756  * Should never happen, but since I shot myself in the foot once
757  * this way, I thought I'd make it easy to debug if I ever do
758  * it again... (;-)...
759  */
760  if (c->id == 0)
761  {
762  if (c->name)
763  clib_warning ("Trying to register %s with a NULL msg id!", c->name);
764  else
765  clib_warning ("Trying to register a NULL msg with a NULL msg id!");
766  clib_warning ("Did you forget to call setup_message_id_table?");
767  return;
768  }
769 
770 #define _(a) vec_validate (am->a, c->id);
772 #undef _
773 
774  if (am->msg_handlers[c->id] && am->msg_handlers[c->id] != c->handler)
776  ("BUG: re-registering 'vl_api_%s_t_handler'."
777  "Handler was %llx, replaced by %llx",
778  c->name, am->msg_handlers[c->id], c->handler);
779 
780  am->msg_names[c->id] = c->name;
781  am->msg_handlers[c->id] = c->handler;
782  am->msg_cleanup_handlers[c->id] = c->cleanup;
783  am->msg_endian_handlers[c->id] = c->endian;
784  am->msg_print_handlers[c->id] = c->print;
785  am->message_bounce[c->id] = c->message_bounce;
786  am->is_mp_safe[c->id] = c->is_mp_safe;
787 
788  am->api_trace_cfg[c->id].size = c->size;
789  am->api_trace_cfg[c->id].trace_enable = c->traced;
790  am->api_trace_cfg[c->id].replay_enable = c->replay;
791 }
792 
793 /*
794  * vl_msg_api_set_handlers
795  * preserve the old API for a while
796  */
797 void
798 vl_msg_api_set_handlers (int id, char *name, void *handler, void *cleanup,
799  void *endian, void *print, int size, int traced)
800 {
802  vl_msg_api_msg_config_t *c = &cfg;
803 
804  clib_memset (c, 0, sizeof (*c));
805 
806  c->id = id;
807  c->name = name;
808  c->handler = handler;
809  c->cleanup = cleanup;
810  c->endian = endian;
811  c->print = print;
812  c->traced = traced;
813  c->replay = 1;
814  c->message_bounce = 0;
815  c->is_mp_safe = 0;
816  vl_msg_api_config (c);
817 }
818 
819 void
821 {
823  vl_msg_api_msg_config_t *c = &cfg;
824 
825  clib_memset (c, 0, sizeof (*c));
826 
827  c->id = msg_id;
828  vl_msg_api_config (c);
829 }
830 
831 void
832 vl_msg_api_set_cleanup_handler (int msg_id, void *fp)
833 {
834  api_main_t *am = &api_main;
835  ASSERT (msg_id > 0);
836 
837  vec_validate (am->msg_cleanup_handlers, msg_id);
838  am->msg_cleanup_handlers[msg_id] = fp;
839 }
840 
841 void
843 {
844  uword msg;
845 
846  while (!svm_queue_sub (q, (u8 *) & msg, SVM_Q_WAIT, 0))
847  vl_msg_api_handler ((void *) msg);
848 }
849 
852 {
853  switch (which)
854  {
855  case VL_API_TRACE_RX:
856  return am->rx_trace;
857  case VL_API_TRACE_TX:
858  return am->tx_trace;
859  default:
860  return 0;
861  }
862 }
863 
864 void
865 vl_noop_handler (void *mp)
866 {
867 }
868 
869 
871 
872 void
874 {
875  post_mortem_dump_enabled = enable;
876 }
877 
878 void
880 {
881  api_main_t *am = &api_main;
882  FILE *fp;
883  char filename[64];
884  int rv;
885 
886  if (post_mortem_dump_enabled == 0)
887  return;
888 
889  snprintf (filename, sizeof (filename), "/tmp/api_post_mortem.%d",
890  getpid ());
891 
892  fp = fopen (filename, "w");
893  if (fp == NULL)
894  {
895  rv = write (2, "Couldn't create ", 16);
896  rv = write (2, filename, strlen (filename));
897  rv = write (2, "\n", 1);
898  return;
899  }
900  rv = vl_msg_api_trace_save (am, VL_API_TRACE_RX, fp);
901  fclose (fp);
902  if (rv < 0)
903  {
904  rv = write (2, "Failed to save post-mortem API trace to ", 40);
905  rv = write (2, filename, strlen (filename));
906  rv = write (2, "\n", 1);
907  }
908 
909 }
910 
911 /* Layered message handling support */
912 
913 void
914 vl_msg_api_register_pd_handler (void *fp, u16 msg_id_host_byte_order)
915 {
916  api_main_t *am = &api_main;
917 
918  /* Mild idiot proofing */
919  if (msg_id_host_byte_order > 10000)
920  clib_warning ("msg_id_host_byte_order endian issue? %d arg vs %d",
921  msg_id_host_byte_order,
922  clib_net_to_host_u16 (msg_id_host_byte_order));
923  vec_validate (am->pd_msg_handlers, msg_id_host_byte_order);
924  am->pd_msg_handlers[msg_id_host_byte_order] = fp;
925 }
926 
927 int
928 vl_msg_api_pd_handler (void *mp, int rv)
929 {
930  api_main_t *am = &api_main;
931  int (*fp) (void *, int);
932  u16 msg_id;
933 
935  msg_id = clib_net_to_host_u16 (*((u16 *) mp));
936  else
937  msg_id = *((u16 *) mp);
938 
939  if (msg_id >= vec_len (am->pd_msg_handlers)
940  || am->pd_msg_handlers[msg_id] == 0)
941  return rv;
942 
943  fp = am->pd_msg_handlers[msg_id];
944  rv = (*fp) (mp, rv);
945  return rv;
946 }
947 
948 void
950 {
951  api_main_t *am = &api_main;
952 
953  am->first_available_msg_id = first_avail;
954 }
955 
956 u16
957 vl_msg_api_get_msg_ids (const char *name, int n)
958 {
959  api_main_t *am = &api_main;
960  u8 *name_copy;
961  vl_api_msg_range_t *rp;
962  uword *p;
963  u16 rv;
964 
965  if (am->msg_range_by_name == 0)
966  am->msg_range_by_name = hash_create_string (0, sizeof (uword));
967 
968  name_copy = format (0, "%s%c", name, 0);
969 
970  p = hash_get_mem (am->msg_range_by_name, name_copy);
971  if (p)
972  {
973  clib_warning ("WARNING: duplicate message range registration for '%s'",
974  name_copy);
975  vec_free (name_copy);
976  return ((u16) ~ 0);
977  }
978 
979  if (n < 0 || n > 1024)
980  {
982  ("WARNING: bad number of message-IDs (%d) requested by '%s'",
983  n, name_copy);
984  vec_free (name_copy);
985  return ((u16) ~ 0);
986  }
987 
988  vec_add2 (am->msg_ranges, rp, 1);
989 
990  rv = rp->first_msg_id = am->first_available_msg_id;
991  am->first_available_msg_id += n;
992  rp->last_msg_id = am->first_available_msg_id - 1;
993  rp->name = name_copy;
994 
995  hash_set_mem (am->msg_range_by_name, name_copy, rp - am->msg_ranges);
996 
997  return rv;
998 }
999 
1000 void
1001 vl_msg_api_add_msg_name_crc (api_main_t * am, const char *string, u32 id)
1002 {
1003  uword *p;
1004 
1005  if (am->msg_index_by_name_and_crc == 0)
1007 
1008  p = hash_get_mem (am->msg_index_by_name_and_crc, string);
1009  if (p)
1010  {
1011  clib_warning ("attempt to redefine '%s' ignored...", string);
1012  return;
1013  }
1014 
1015  hash_set_mem (am->msg_index_by_name_and_crc, string, id);
1016 }
1017 
1018 void
1019 vl_msg_api_add_version (api_main_t * am, const char *string,
1020  u32 major, u32 minor, u32 patch)
1021 {
1022  api_version_t version = {.major = major,.minor = minor,.patch = patch };
1023  ASSERT (strlen (string) < 64);
1024  strncpy (version.name, string, 64 - 1);
1025  vec_add1 (am->api_version_list, version);
1026 }
1027 
1028 u32
1030 {
1031  api_main_t *am = &api_main;
1032  uword *p;
1033 
1034  if (am->msg_index_by_name_and_crc)
1035  {
1036  p = hash_get_mem (am->msg_index_by_name_and_crc, name_and_crc);
1037  if (p)
1038  return p[0];
1039  }
1040  return ~0;
1041 }
1042 
1043 void *
1045 {
1046  api_main_t *am = &api_main;
1047  pthread_mutex_lock (&am->vlib_rp->mutex);
1048  return svm_push_data_heap (am->vlib_rp);
1049 }
1050 
1051 void
1052 vl_msg_pop_heap (void *oldheap)
1053 {
1054  api_main_t *am = &api_main;
1055  svm_pop_heap (oldheap);
1056  pthread_mutex_unlock (&am->vlib_rp->mutex);
1057 }
1058 
1059 int
1060 vl_api_to_api_string (u32 len, const char *buf, vl_api_string_t * str)
1061 {
1062  clib_memcpy_fast (str->buf, buf, len);
1063  str->length = htonl (len);
1064  return len + sizeof (u32);
1065 }
1066 
1067 int
1069 {
1070  u32 len = vec_len (vec);
1071  clib_memcpy (str->buf, vec, len);
1072  str->length = htonl (len);
1073  return len + sizeof (u32);
1074 }
1075 
1076 /* Return a pointer to the API string (not nul terminated */
1077 u8 *
1079 {
1080  return astr->buf;
1081 }
1082 
1083 u32
1085 {
1086  return clib_net_to_host_u32 (astr->length);
1087 }
1088 
1089 /*
1090  * Returns a new vector. Remember to free it after use.
1091  */
1092 u8 *
1094 {
1095  u8 *v = 0;
1096  vec_add (v, astr->buf, clib_net_to_host_u32 (astr->length));
1097  return v;
1098 }
1099 
1100 void
1102 {
1103  api_main_t *am = &api_main;
1104  am->elog_main = m;
1105 }
1106 
1107 int
1109 {
1110  int rv;
1111  api_main_t *am = &api_main;
1112 
1113  rv = am->elog_trace_api_messages;
1114  am->elog_trace_api_messages = enable;
1115  return rv;
1116 }
1117 
1118 int
1120 {
1121  api_main_t *am = &api_main;
1122 
1123  return am->elog_trace_api_messages;
1124 }
1125 
1126 /*
1127  * fd.io coding-style-patch-verification: ON
1128  *
1129  * Local Variables:
1130  * eval: (c-set-style "gnu")
1131  * End:
1132  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
void vl_msg_api_set_first_available_msg_id(u16 first_avail)
Definition: api_shared.c:949
Message range (belonging to a plugin)
Definition: api_common.h:112
int vl_msg_api_trace_onoff(api_main_t *am, vl_api_trace_which_t which, int onoff)
Definition: api_shared.c:114
int vl_msg_api_trace_save(api_main_t *am, vl_api_trace_which_t which, FILE *fp)
Definition: api_shared.c:216
int vl_api_to_api_string(u32 len, const char *buf, vl_api_string_t *str)
Definition: api_shared.c:1060
void vl_msg_api_set_handlers(int id, char *name, void *handler, void *cleanup, void *endian, void *print, int size, int traced)
Definition: api_shared.c:798
int vl_msg_api_trace_free(api_main_t *am, vl_api_trace_which_t which)
Definition: api_shared.c:156
int id
the message ID
Definition: api_common.h:122
u8 * name
name of the plugin
Definition: api_common.h:114
static void svm_pop_heap(void *oldheap)
Definition: svm.h:94
void vl_msg_api_set_cleanup_handler(int msg_id, void *fp)
Definition: api_shared.c:832
int vl_msg_api_pd_handler(void *mp, int rv)
Definition: api_shared.c:928
void vl_msg_api_handler(void *the_msg)
Definition: api_shared.c:632
void * print
message print function
Definition: api_common.h:128
u8 wrapped
trace has wrapped
Definition: api_common.h:94
static u64 do_it(pg_main_t *pg, pg_stream_t *s, u32 *buffers, u32 n_buffers, u32 lo_bit, u32 hi_bit, u64 v_min, u64 v_max, u64 v, pg_edit_type_t edit_type)
Definition: input.c:756
Optimized string handling code, including c11-compliant "safe C library" variants.
int size
for sanity checking
Definition: api_common.h:82
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
static void msg_handler_internal(api_main_t *am, void *the_msg, int trace_it, int do_it, int free_it)
Definition: api_shared.c:427
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
u8 * message_bounce
Don&#39;t automatically free message buffer vetor.
Definition: api_common.h:223
static u8 post_mortem_dump_enabled
Definition: api_shared.c:870
Message configuration definition.
Definition: api_common.h:120
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
vl_api_trace_t * vl_msg_api_trace_get(api_main_t *am, vl_api_trace_which_t which)
Definition: api_shared.c:851
u32 vl_msg_api_get_msg_length(void *msg_arg)
Definition: api_shared.c:719
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:560
int i
api_version_t * api_version_list
api version list
Definition: api_common.h:326
#define hash_set_mem(h, key, value)
Definition: hash.h:275
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
int vl_msg_api_trace_configure(api_main_t *am, vl_api_trace_which_t which, u32 nitems)
Definition: api_shared.c:356
u8 data[128]
Definition: ipsec.api:251
#define vl_msg_api_barrier_trace_context(X)
Definition: api_common.h:169
void(** msg_cleanup_handlers)(void *)
non-default message cleanup handler vector
Definition: api_common.h:211
void vl_noop_handler(void *mp)
Definition: api_shared.c:865
void * cleanup
non-default message cleanup handler
Definition: api_common.h:126
unsigned char u8
Definition: types.h:56
trace_cfg_t * api_trace_cfg
Current trace configuration.
Definition: api_common.h:250
void vl_msg_api_handler_no_trace_no_free(void *the_msg)
Definition: api_shared.c:653
int size
message size
Definition: api_common.h:129
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
#define clib_memcpy(d, s, n)
Definition: string.h:180
#define vec_add(V, E, N)
Add N elements to end of vector V (no header, unspecified alignment)
Definition: vec.h:598
void vl_msg_api_cleanup_handler(void *the_msg)
Definition: api_shared.c:681
void * endian
message endian function
Definition: api_common.h:127
u8 * vl_api_from_api_to_vec(vl_api_string_t *astr)
Definition: api_shared.c:1093
int svm_queue_sub(svm_queue_t *q, u8 *elem, svm_q_conditional_wait_t cond, u32 time)
Definition: queue.c:356
vl_api_trace_t * rx_trace
Received message trace configuration.
Definition: api_common.h:241
static void * svm_push_data_heap(svm_region_t *rp)
Definition: svm.h:86
#define always_inline
Definition: clib.h:99
void vl_msg_api_config(vl_msg_api_msg_config_t *c)
Definition: api_shared.c:749
void vl_msg_api_post_mortem_dump_enable_disable(int enable)
Definition: api_shared.c:873
#define clib_arch_is_little_endian
Definition: byte_order.h:54
svm_region_t * vlib_rp
Current binary api segment descriptor.
Definition: api_common.h:256
unsigned int u32
Definition: types.h:88
#define VL_API_BIG_ENDIAN
Definition: api_common.h:109
int vl_msg_api_tx_trace_enabled(api_main_t *am)
Definition: api_shared.c:57
char name[64]
Definition: api_common.h:199
void vl_msg_api_trace_only(void *the_msg)
Definition: api_shared.c:670
void vl_msg_api_clean_handlers(int msg_id)
Definition: api_shared.c:820
#define hash_create_string(elts, value_bytes)
Definition: hash.h:690
void vl_msg_api_handler_with_vm_node(api_main_t *am, void *the_msg, vlib_main_t *vm, vlib_node_runtime_t *node)
Definition: api_shared.c:529
u16 last_msg_id
last assigned message ID
Definition: api_common.h:116
int vl_api_get_elog_trace_api_messages(void)
Definition: api_shared.c:1119
uword size
int elog_trace_api_messages
Definition: api_common.h:345
void vl_msg_api_add_msg_name_crc(api_main_t *am, const char *string, u32 id)
Definition: api_shared.c:1001
int vl_msg_api_rx_trace_enabled(api_main_t *am)
Definition: api_shared.c:51
void(** msg_print_handlers)(void *, void *)
Message print function vector.
Definition: api_common.h:217
int replay_enable
This message can be replayed.
Definition: api_common.h:84
unsigned short u16
Definition: types.h:57
int message_bounce
do not free message after processing
Definition: api_common.h:132
u32 curindex
Current index in circular buffer.
Definition: api_common.h:97
static void cleanup(void)
Definition: client.c:131
#define ELOG_DATA(em, f)
Definition: elog.h:484
#define PREDICT_FALSE(x)
Definition: clib.h:112
u32 vl_api_string_len(vl_api_string_t *astr)
Definition: api_shared.c:1084
u8 name[64]
Definition: memclnt.api:152
word fformat(FILE *f, char *fmt,...)
Definition: format.c:462
elog_main_t * elog_main
event log
Definition: api_common.h:344
u8 len
Definition: ip_types.api:90
API main structure, used by both vpp and binary API clients.
Definition: api_common.h:203
u8 enabled
trace is enabled
Definition: api_common.h:93
The fine-grained event logger allows lightweight, thread-safe event logging at minimum cost...
#define clib_arch_is_big_endian
Definition: byte_order.h:53
svmdb_client_t * c
API trace state.
Definition: api_common.h:90
vlib_main_t * vm
Definition: buffer.c:323
void serialize_open_vector(serialize_main_t *m, u8 *vector)
Definition: serialize.c:909
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
void vl_msg_api_barrier_release(void)
Definition: api_shared.c:422
vl_api_msg_range_t * msg_ranges
vector of message ranges
Definition: api_common.h:281
void vl_msg_api_post_mortem_dump(void)
Definition: api_shared.c:879
#define clib_warning(format, args...)
Definition: error.h:59
int vl_api_set_elog_trace_api_messages(int enable)
Definition: api_shared.c:1108
u8 ** traces
Trace ring.
Definition: api_common.h:98
static void serialize_integer(serialize_main_t *m, u64 x, u32 n_bytes)
Definition: serialize.h:185
blocking call - best used in combination with condvars, for eventfds we don&#39;t yield the cpu ...
Definition: queue.h:42
#define ELOG_TYPE_DECLARE(f)
Definition: elog.h:442
const char ** msg_names
Message name vector.
Definition: api_common.h:220
int replay
is this message to be replayed?
Definition: api_common.h:131
void vl_msg_api_socket_handler(void *the_msg)
Definition: api_shared.c:728
api_main_t api_main
Definition: api_shared.c:35
vl_api_trace_t * tx_trace
Sent message trace configuration.
Definition: api_common.h:244
#define ASSERT(truth)
static uword hash_elts(void *v)
Definition: hash.h:118
u32 data_len
message length not including header
Definition: api_common.h:140
Message header structure.
Definition: api_common.h:137
vl_api_trace_which_t
Trace RX / TX enum.
Definition: api_common.h:102
option version
Definition: memclnt.api:17
u8 * vl_api_serialize_message_table(api_main_t *am, u8 *vector)
Definition: api_shared.c:193
void vl_msg_api_replay_handler(void *the_msg)
Definition: api_shared.c:701
void vl_msg_api_add_version(api_main_t *am, const char *string, u32 major, u32 minor, u32 patch)
Definition: api_shared.c:1019
void vl_msg_api_handler_no_free(void *the_msg)
Definition: api_shared.c:643
void vl_msg_api_free(void *)
void vl_api_set_elog_main(elog_main_t *m)
Definition: api_shared.c:1101
u32 missing_clients
Number of missing clients / failed message sends.
Definition: api_common.h:238
void * vl_msg_push_heap(void)
Definition: api_shared.c:1044
u32 vl_msg_api_get_msg_index(u8 *name_and_crc)
Definition: api_shared.c:1029
void vl_msg_api_increment_missing_client_counter(void)
Definition: api_shared.c:44
u16 first_msg_id
first assigned message ID
Definition: api_common.h:115
void vl_msg_api_register_pd_handler(void *fp, u16 msg_id_host_byte_order)
Definition: api_shared.c:914
void(** msg_endian_handlers)(void *)
Message endian handler vector.
Definition: api_common.h:214
u32 elog_string(elog_main_t *em, char *fmt,...)
add a string to the event-log string table
Definition: elog.c:562
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
#define hash_foreach_pair(p, v, body)
Iterate over hash pairs.
Definition: hash.h:373
u64 uword
Definition: types.h:112
static u32 vl_msg_api_get_msg_length_inline(void *msg_arg)
Definition: api.h:91
int(** pd_msg_handlers)(void *, int)
Plaform-dependent (aka hardware) message handler vector.
Definition: api_common.h:208
#define foreach_msg_api_vector
Definition: api_shared.c:738
struct _svm_queue svm_queue_t
#define hash_get_mem(h, key)
Definition: hash.h:269
u16 vl_msg_api_get_msg_ids(const char *name, int n)
Definition: api_shared.c:957
u16 first_available_msg_id
First available message ID, for theplugin msg allocator.
Definition: api_common.h:275
void vl_msg_pop_heap(void *oldheap)
Definition: api_shared.c:1052
u8 * vl_api_from_api_string(vl_api_string_t *astr)
Definition: api_shared.c:1078
u8 endian
trace endianness
Definition: api_common.h:92
void(** msg_handlers)(void *)
Message handler vector.
Definition: api_common.h:206
u8 * is_mp_safe
Message is mp safe vector.
Definition: api_common.h:226
void vl_msg_api_queue_handler(svm_queue_t *q)
Definition: api_shared.c:842
void vl_msg_api_trace(api_main_t *am, vl_api_trace_t *tp, void *msg)
Definition: api_shared.c:66
int trace_enable
trace this message
Definition: api_common.h:83
int msg_print_flag
Print every received message.
Definition: api_common.h:247
void * serialize_close_vector(serialize_main_t *m)
Definition: serialize.c:919
int is_mp_safe
worker thread barrier required?
Definition: api_common.h:133
u32 id
Definition: udp.api:45
int traced
is this message to be traced?
Definition: api_common.h:130
const char * region_name
Shared VM binary API region name.
Definition: api_common.h:329
Trace configuration for a single message.
Definition: api_common.h:80
#define VL_API_LITTLE_ENDIAN
Definition: api_common.h:108
uword * msg_index_by_name_and_crc
client message index hash table
Definition: api_common.h:323
uword * msg_range_by_name
Message range by name hash.
Definition: api_common.h:278
char * name
the message name
Definition: api_common.h:123
u32 nitems
Number of trace records.
Definition: api_common.h:96
int vl_api_vec_to_api_string(const u8 *vec, vl_api_string_t *str)
Definition: api_shared.c:1068
void * handler
the message handler
Definition: api_common.h:125
pthread_mutex_t mutex
Definition: svm_common.h:37
void vl_msg_api_barrier_sync(void)
Definition: api_shared.c:417