FD.io VPP  v20.01-rc1
Vector Packet Processing
memory_shared.c
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1 /*
2  *------------------------------------------------------------------
3  * memclnt_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 <unistd.h>
27 #include <signal.h>
28 
29 #include <vppinfra/format.h>
30 #include <vppinfra/byte_order.h>
31 #include <vppinfra/error.h>
32 #include <vppinfra/elog.h>
33 #include <svm/queue.h>
34 #include <vlib/vlib.h>
35 #include <vlib/unix/unix.h>
36 #include <vlibmemory/memory_api.h>
38 #include <vlibapi/api_common.h>
39 
40 #define vl_typedefs
42 #undef vl_typedefs
43 
44 #define DEBUG_MESSAGE_BUFFER_OVERRUN 0
45 
46 CLIB_NOSANITIZE_ADDR static inline void *
47 vl_msg_api_alloc_internal (svm_region_t * vlib_rp, int nbytes, int pool,
48  int may_return_null)
49 {
50  int i;
51  msgbuf_t *rv;
52  ring_alloc_t *ap;
53  svm_queue_t *q;
54  void *oldheap;
55  vl_shmem_hdr_t *shmem_hdr;
57 
58  shmem_hdr = (void *) vlib_rp->user_ctx;
59 
61  nbytes += 4;
62 #endif
63 
64  ASSERT (pool == 0 || vlib_get_thread_index () == 0);
65 
66  if (shmem_hdr == 0)
67  {
68  clib_warning ("shared memory header NULL");
69  return 0;
70  }
71 
72  /* account for the msgbuf_t header */
73  nbytes += sizeof (msgbuf_t);
74 
75  if (shmem_hdr->vl_rings == 0)
76  {
77  clib_warning ("vl_rings NULL");
78  ASSERT (0);
79  abort ();
80  }
81 
82  if (shmem_hdr->client_rings == 0)
83  {
84  clib_warning ("client_rings NULL");
85  ASSERT (0);
86  abort ();
87  }
88 
89  ap = pool ? shmem_hdr->vl_rings : shmem_hdr->client_rings;
90  for (i = 0; i < vec_len (ap); i++)
91  {
92  /* Too big? */
93  if (nbytes > ap[i].size)
94  {
95  continue;
96  }
97 
98  q = ap[i].rp;
99  if (pool == 0)
100  {
101  pthread_mutex_lock (&q->mutex);
102  }
103  rv = (msgbuf_t *) (&q->data[0] + q->head * q->elsize);
104  /*
105  * Is this item still in use?
106  */
107  if (rv->q)
108  {
109  u32 now = (u32) time (0);
110 
111  if (PREDICT_TRUE (rv->gc_mark_timestamp == 0))
112  rv->gc_mark_timestamp = now;
113  else
114  {
115  if (now - rv->gc_mark_timestamp > 10)
116  {
117  if (CLIB_DEBUG > 0)
118  {
119  u16 *msg_idp, msg_id;
121  ("garbage collect pool %d ring %d index %d", pool, i,
122  q->head);
123  msg_idp = (u16 *) (rv->data);
124  msg_id = clib_net_to_host_u16 (*msg_idp);
125  if (msg_id < vec_len (vlibapi_get_main ()->msg_names))
126  clib_warning ("msg id %d name %s", (u32) msg_id,
127  vlibapi_get_main ()->msg_names[msg_id]);
128  }
129  shmem_hdr->garbage_collects++;
130  goto collected;
131  }
132  }
133 
134 
135  /* yes, loser; try next larger pool */
136  ap[i].misses++;
137  if (pool == 0)
138  pthread_mutex_unlock (&q->mutex);
139  continue;
140  }
141  collected:
142 
143  /* OK, we have a winner */
144  ap[i].hits++;
145  /*
146  * Remember the source queue, although we
147  * don't need to know the queue to free the item.
148  */
149  rv->q = q;
150  rv->gc_mark_timestamp = 0;
151  q->head++;
152  if (q->head == q->maxsize)
153  q->head = 0;
154 
155  if (pool == 0)
156  pthread_mutex_unlock (&q->mutex);
157  goto out;
158  }
159 
160  /*
161  * Request too big, or head element of all size-compatible rings
162  * still in use. Fall back to shared-memory malloc.
163  */
164  am->ring_misses++;
165 
166  oldheap = vl_msg_push_heap_w_region (vlib_rp);
167  if (may_return_null)
168  {
169  rv = clib_mem_alloc_or_null (nbytes);
170  if (PREDICT_FALSE (rv == 0))
171  {
172  vl_msg_pop_heap_w_region (vlib_rp, oldheap);
173  return 0;
174  }
175  }
176  else
177  rv = clib_mem_alloc (nbytes);
178 
179  rv->q = 0;
180  rv->gc_mark_timestamp = 0;
181  vl_msg_pop_heap_w_region (vlib_rp, oldheap);
182 
183 out:
184 #if DEBUG_MESSAGE_BUFFER_OVERRUN > 0
185  {
186  nbytes -= 4;
187  u32 *overrun;
188  overrun = (u32 *) (rv->data + nbytes - sizeof (msgbuf_t));
189  *overrun = 0x1badbabe;
190  }
191 #endif
192  rv->data_len = htonl (nbytes - sizeof (msgbuf_t));
193 
194  VL_MSG_API_UNPOISON (rv->data);
195  return (rv->data);
196 }
197 
198 void *
199 vl_msg_api_alloc (int nbytes)
200 {
201  int pool;
202  api_main_t *am = vlibapi_get_main ();
203  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
204 
205  /*
206  * Clients use pool-0, vlib proc uses pool 1
207  */
208  pool = (am->our_pid == shmem_hdr->vl_pid);
209  return vl_msg_api_alloc_internal (am->vlib_rp, nbytes, pool,
210  0 /* may_return_null */ );
211 }
212 
213 void *
215 {
216  void *ret;
217 
218  ret = vl_msg_api_alloc (nbytes);
219  clib_memset (ret, 0, nbytes);
220  return ret;
221 }
222 
223 void *
225 {
226  int pool;
227  api_main_t *am = vlibapi_get_main ();
228  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
229 
230  pool = (am->our_pid == shmem_hdr->vl_pid);
231  return vl_msg_api_alloc_internal (am->vlib_rp, nbytes, pool,
232  1 /* may_return_null */ );
233 }
234 
235 void *
237 {
238  api_main_t *am = vlibapi_get_main ();
239  return vl_msg_api_alloc_internal (am->vlib_rp, nbytes, 0,
240  0 /* may_return_null */ );
241 }
242 
243 void *
245 {
246  void *ret;
247 
248  ret = vl_msg_api_alloc_as_if_client (nbytes);
249  clib_memset (ret, 0, nbytes);
250  return ret;
251 }
252 
253 void *
255 {
256  api_main_t *am = vlibapi_get_main ();
257  return vl_msg_api_alloc_internal (am->vlib_rp, nbytes, 0,
258  1 /* may_return_null */ );
259 }
260 
261 void *
263 {
264  return vl_msg_api_alloc_internal (reg->vlib_rp, nbytes, 0,
265  0 /* may_return_null */ );
266 }
267 
268 void
270 {
271  msgbuf_t *rv;
272  void *oldheap;
273 
274  rv = (msgbuf_t *) (((u8 *) a) - offsetof (msgbuf_t, data));
275 
276  /*
277  * Here's the beauty of the scheme. Only one proc/thread has
278  * control of a given message buffer. To free a buffer, we just clear the
279  * queue field, and leave. No locks, no hits, no errors...
280  */
281  if (rv->q)
282  {
283  rv->q = 0;
284  rv->gc_mark_timestamp = 0;
285 #if DEBUG_MESSAGE_BUFFER_OVERRUN > 0
286  {
287  u32 *overrun;
288  overrun = (u32 *) (rv->data + ntohl (rv->data_len));
289  ASSERT (*overrun == 0x1badbabe);
290  }
291 #endif
292  VL_MSG_API_POISON (rv->data);
293  return;
294  }
295 
296  oldheap = vl_msg_push_heap_w_region (vlib_rp);
297 
298 #if DEBUG_MESSAGE_BUFFER_OVERRUN > 0
299  {
300  u32 *overrun;
301  overrun = (u32 *) (rv->data + ntohl (rv->data_len));
302  ASSERT (*overrun == 0x1badbabe);
303  }
304 #endif
305 
306  clib_mem_free (rv);
307  vl_msg_pop_heap_w_region (vlib_rp, oldheap);
308 }
309 
310 void
312 {
313  api_main_t *am = vlibapi_get_main ();
315 }
316 
317 static void
319 {
320  msgbuf_t *rv;
321  void *oldheap;
322  api_main_t *am = vlibapi_get_main ();
323 
324  rv = (msgbuf_t *) (((u8 *) a) - offsetof (msgbuf_t, data));
325  /*
326  * Here's the beauty of the scheme. Only one proc/thread has
327  * control of a given message buffer. To free a buffer, we just clear the
328  * queue field, and leave. No locks, no hits, no errors...
329  */
330  if (rv->q)
331  {
332  rv->q = 0;
333  VL_MSG_API_POISON (rv->data);
334  return;
335  }
336 
337  oldheap = svm_push_data_heap (am->vlib_rp);
338  clib_mem_free (rv);
339  svm_pop_heap (oldheap);
340 }
341 
342 void
344 {
345  api_main_t *am = vlibapi_get_main ();
346 
347  am->root_path = name;
348 }
349 
350 void
352 {
353  api_main_t *am = vlibapi_get_main ();
354 
355  am->api_uid = uid;
356 }
357 
358 void
360 {
361  api_main_t *am = vlibapi_get_main ();
362 
363  am->api_gid = gid;
364 }
365 
366 void
368 {
369  api_main_t *am = vlibapi_get_main ();
370 
371  am->global_baseva = baseva;
372 }
373 
374 void
376 {
377  api_main_t *am = vlibapi_get_main ();
378 
379  am->global_size = size;
380 }
381 
382 void
384 {
385  api_main_t *am = vlibapi_get_main ();
386 
387  am->api_size = size;
388 }
389 
390 void
392 {
393  api_main_t *am = vlibapi_get_main ();
394 
396 }
397 
398 void
400 {
401  api_main_t *am = vlibapi_get_main ();
402 
403  am->api_pvt_heap_size = size;
404 }
405 
406 static void
408 {
409  api_main_t *am = vlibapi_get_main ();
410  u32 vlib_input_queue_length;
411 
412  /* vlib main input queue */
413  vlib_input_queue_length = 1024;
414  if (am->vlib_input_queue_length)
415  vlib_input_queue_length = am->vlib_input_queue_length;
416 
417  shmem_hdr->vl_input_queue =
418  svm_queue_alloc_and_init (vlib_input_queue_length, sizeof (uword),
419  getpid ());
420 
421 #define _(sz,n) \
422  do { \
423  ring_alloc_t _rp; \
424  _rp.rp = svm_queue_alloc_and_init ((n), (sz), 0); \
425  _rp.size = (sz); \
426  _rp.nitems = n; \
427  _rp.hits = 0; \
428  _rp.misses = 0; \
429  vec_add1(shmem_hdr->vl_rings, _rp); \
430  } while (0);
431 
433 #undef _
434 
435 #define _(sz,n) \
436  do { \
437  ring_alloc_t _rp; \
438  _rp.rp = svm_queue_alloc_and_init ((n), (sz), 0); \
439  _rp.size = (sz); \
440  _rp.nitems = n; \
441  _rp.hits = 0; \
442  _rp.misses = 0; \
443  vec_add1(shmem_hdr->client_rings, _rp); \
444  } while (0);
445 
447 #undef _
448 }
449 
450 void
452 {
454  ring_alloc_t *rp;
455  u32 size;
456 
457  if (!config)
458  {
460  return;
461  }
462 
463  vec_foreach (c, config)
464  {
465  switch (c->type)
466  {
467  case VL_API_QUEUE:
469  getpid ());
470  continue;
471  case VL_API_VLIB_RING:
472  vec_add2 (hdr->vl_rings, rp, 1);
473  break;
474  case VL_API_CLIENT_RING:
475  vec_add2 (hdr->client_rings, rp, 1);
476  break;
477  default:
478  clib_warning ("unknown config type: %d", c->type);
479  continue;
480  }
481 
482  size = sizeof (ring_alloc_t) + c->size;
483  rp->rp = svm_queue_alloc_and_init (c->count, size, 0);
484  rp->size = size;
485  rp->nitems = c->count;
486  rp->hits = 0;
487  rp->misses = 0;
488  }
489 }
490 
491 void
493  int is_vlib, int is_private_region)
494 {
495  api_main_t *am = vlibapi_get_main ();
496  vl_shmem_hdr_t *shmem_hdr = 0;
497  void *oldheap;
498  ASSERT (vlib_rp);
499 
500  /* $$$$ need private region config parameters */
501 
502  oldheap = svm_push_data_heap (vlib_rp);
503 
504  vec_validate (shmem_hdr, 0);
505  shmem_hdr->version = VL_SHM_VERSION;
506  shmem_hdr->clib_file_index = VL_API_INVALID_FI;
507 
508  /* Set up the queue and msg ring allocator */
509  vl_api_mem_config (shmem_hdr, config);
510 
511  if (is_private_region == 0)
512  {
513  am->shmem_hdr = shmem_hdr;
514  am->vlib_rp = vlib_rp;
515  am->our_pid = getpid ();
516  if (is_vlib)
517  am->shmem_hdr->vl_pid = am->our_pid;
518  }
519  else
520  shmem_hdr->vl_pid = am->our_pid;
521 
522  svm_pop_heap (oldheap);
523 
524  /*
525  * After absolutely everything that a client might see is set up,
526  * declare the shmem region valid
527  */
528  vlib_rp->user_ctx = shmem_hdr;
529 
530  pthread_mutex_unlock (&vlib_rp->mutex);
531 }
532 
533 int
534 vl_map_shmem (const char *region_name, int is_vlib)
535 {
536  svm_map_region_args_t _a, *a = &_a;
537  svm_region_t *vlib_rp, *root_rp;
538  api_main_t *am = vlibapi_get_main ();
539  int i;
540  struct timespec ts, tsrem;
541  char *vpe_api_region_suffix = "-vpe-api";
542 
543  clib_memset (a, 0, sizeof (*a));
544 
545  if (strstr (region_name, vpe_api_region_suffix))
546  {
547  u8 *root_path = format (0, "%s", region_name);
548  _vec_len (root_path) = (vec_len (root_path) -
549  strlen (vpe_api_region_suffix));
550  vec_terminate_c_string (root_path);
551  a->root_path = (const char *) root_path;
552  am->root_path = (const char *) root_path;
553  }
554 
555  if (is_vlib == 0)
556  {
557  int tfd;
558  u8 *api_name;
559  /*
560  * Clients wait for vpp to set up the root / API regioins
561  */
562  if (am->root_path)
563  api_name = format (0, "/dev/shm/%s-%s%c", am->root_path,
564  region_name + 1, 0);
565  else
566  api_name = format (0, "/dev/shm%s%c", region_name, 0);
567 
568  /* Wait up to 100 seconds... */
569  for (i = 0; i < 10000; i++)
570  {
571  ts.tv_sec = 0;
572  ts.tv_nsec = 10000 * 1000; /* 10 ms */
573  while (nanosleep (&ts, &tsrem) < 0)
574  ts = tsrem;
575  tfd = open ((char *) api_name, O_RDWR);
576  if (tfd >= 0)
577  break;
578  }
579  vec_free (api_name);
580  if (tfd < 0)
581  {
582  clib_warning ("region init fail");
583  return -2;
584  }
585  close (tfd);
586  svm_region_init_chroot_uid_gid (am->root_path, getuid (), getgid ());
587  }
588 
589  if (a->root_path != NULL)
590  {
591  a->name = "/vpe-api";
592  }
593  else
594  a->name = region_name;
595  a->size = am->api_size ? am->api_size : (16 << 20);
596  a->flags = SVM_FLAGS_MHEAP;
597  a->uid = am->api_uid;
598  a->gid = am->api_gid;
600 
601  vlib_rp = svm_region_find_or_create (a);
602 
603  if (vlib_rp == 0)
604  return (-2);
605 
606  pthread_mutex_lock (&vlib_rp->mutex);
607  /* Has someone else set up the shared-memory variable table? */
608  if (vlib_rp->user_ctx)
609  {
610  am->shmem_hdr = (void *) vlib_rp->user_ctx;
611  am->our_pid = getpid ();
612  if (is_vlib)
613  {
614  svm_queue_t *q;
615  uword old_msg;
616  /*
617  * application restart. Reset cached pids, API message
618  * rings, list of clients; otherwise, various things
619  * fail. (e.g. queue non-empty notification)
620  */
621 
622  /* ghosts keep the region from disappearing properly */
625  q = am->shmem_hdr->vl_input_queue;
626  am->shmem_hdr->vl_pid = getpid ();
627  q->consumer_pid = am->shmem_hdr->vl_pid;
628  /* Drain the input queue, freeing msgs */
629  for (i = 0; i < 10; i++)
630  {
631  if (pthread_mutex_trylock (&q->mutex) == 0)
632  {
633  pthread_mutex_unlock (&q->mutex);
634  goto mutex_ok;
635  }
636  ts.tv_sec = 0;
637  ts.tv_nsec = 10000 * 1000; /* 10 ms */
638  while (nanosleep (&ts, &tsrem) < 0)
639  ts = tsrem;
640  }
641  /* Mutex buggered, "fix" it */
642  clib_memset (&q->mutex, 0, sizeof (q->mutex));
643  clib_warning ("forcibly release main input queue mutex");
644 
645  mutex_ok:
646  am->vlib_rp = vlib_rp;
647  while (svm_queue_sub (q, (u8 *) & old_msg, SVM_Q_NOWAIT, 0)
648  != -2 /* queue underflow */ )
649  {
650  vl_msg_api_free_nolock ((void *) old_msg);
652  }
653  pthread_mutex_unlock (&vlib_rp->mutex);
654  root_rp = svm_get_root_rp ();
655  ASSERT (root_rp);
656  /* Clean up the root region client list */
657  pthread_mutex_lock (&root_rp->mutex);
659  pthread_mutex_unlock (&root_rp->mutex);
660  }
661  else
662  {
663  pthread_mutex_unlock (&vlib_rp->mutex);
664  }
665  am->vlib_rp = vlib_rp;
666  vec_add1 (am->mapped_shmem_regions, vlib_rp);
667  return 0;
668  }
669  /* Clients simply have to wait... */
670  if (!is_vlib)
671  {
672  pthread_mutex_unlock (&vlib_rp->mutex);
673 
674  /* Wait up to 100 seconds... */
675  for (i = 0; i < 10000; i++)
676  {
677  ts.tv_sec = 0;
678  ts.tv_nsec = 10000 * 1000; /* 10 ms */
679  while (nanosleep (&ts, &tsrem) < 0)
680  ts = tsrem;
681  if (vlib_rp->user_ctx)
682  goto ready;
683  }
684  /* Clean up and leave... */
685  svm_region_unmap (vlib_rp);
686  clib_warning ("region init fail");
687  return (-2);
688 
689  ready:
690  am->shmem_hdr = (void *) vlib_rp->user_ctx;
691  am->our_pid = getpid ();
692  am->vlib_rp = vlib_rp;
693  vec_add1 (am->mapped_shmem_regions, vlib_rp);
694  return 0;
695  }
696 
697  /* Nope, it's our problem... */
698  vl_init_shmem (vlib_rp, 0 /* default config */ , 1 /* is vlib */ ,
699  0 /* is_private_region */ );
700 
701  vec_add1 (am->mapped_shmem_regions, vlib_rp);
702  return 0;
703 }
704 
705 void
707 {
708  api_main_t *am = vlibapi_get_main ();
709 
710  vec_add1 (am->mapped_shmem_regions, rp);
711 }
712 
713 static void
715 {
716  svm_region_t *rp;
717  int i;
718  api_main_t *am = vlibapi_get_main ();
719 
720  if (!svm_get_root_rp ())
721  return;
722 
723  for (i = 0; i < vec_len (am->mapped_shmem_regions); i++)
724  {
725  rp = am->mapped_shmem_regions[i];
726  is_client ? svm_region_unmap_client (rp) : svm_region_unmap (rp);
727  }
728 
730  am->shmem_hdr = 0;
731 
732  is_client ? svm_region_exit_client () : svm_region_exit ();
733 
734  /* $$$ more careful cleanup, valgrind run... */
735  vec_free (am->msg_handlers);
738 }
739 
740 void
742 {
744 }
745 
746 void
748 {
750 }
751 
752 void
754 {
755  api_main_t *am = vlibapi_get_main ();
756  void *msg = (void *) *(uword *) elem;
757 
758  if (am->tx_trace && am->tx_trace->enabled)
759  vl_msg_api_trace (am, am->tx_trace, msg);
760 
761  /*
762  * Announce a probable binary API client bug:
763  * some client's input queue is stuffed.
764  * The situation may be recoverable, or not.
765  */
766  if (PREDICT_FALSE
767  (am->vl_clients /* vpp side */ && (q->cursize == q->maxsize)))
768  {
770  {
771  /* *INDENT-OFF* */
772  ELOG_TYPE_DECLARE (e) =
773  {
774  .format = "api-client-queue-stuffed: %x%x",
775  .format_args = "i4i4",
776  };
777  /* *INDENT-ON* */
778  struct
779  {
780  u32 hi, low;
781  } *ed;
782  ed = ELOG_DATA (am->elog_main, e);
783  ed->hi = (uword) q >> 32;
784  ed->low = (uword) q & 0xFFFFFFFF;
785  clib_warning ("WARNING: client input queue at %llx is stuffed...",
786  q);
787  }
788  }
789  VL_MSG_API_POISON (msg);
790  (void) svm_queue_add (q, elem, 0 /* nowait */ );
791 }
792 
793 int
795 {
796  return (q->cursize < q->maxsize);
797 }
798 
799 void
801 {
802  api_main_t *am = vlibapi_get_main ();
803  void *msg = (void *) *(uword *) elem;
804 
805  if (am->tx_trace && am->tx_trace->enabled)
806  vl_msg_api_trace (am, am->tx_trace, msg);
807 
808  (void) svm_queue_add_nolock (q, elem);
809  VL_MSG_API_POISON (msg);
810 }
811 
812 /*
813  * fd.io coding-style-patch-verification: ON
814  *
815  * Local Variables:
816  * eval: (c-set-style "gnu")
817  * End:
818  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:440
u64 api_pvt_heap_size
size of the api private mheap
Definition: api_common.h:324
void svm_region_init_chroot_uid_gid(const char *root_path, int uid, int gid)
Definition: svm.c:877
svm_region_t * svm_get_root_rp(void)
Definition: svm.c:54
const char * root_path
Definition: svm_common.h:67
static void svm_pop_heap(void *oldheap)
Definition: svm.h:94
int svm_queue_add(svm_queue_t *q, u8 *elem, int nowait)
Definition: queue.c:247
a
Definition: bitmap.h:538
void vl_set_global_memory_baseva(u64 baseva)
int vl_map_shmem(const char *region_name, int is_vlib)
u64 api_size
size of the API region
Definition: api_common.h:318
Optimized string handling code, including c11-compliant "safe C library" variants.
u32 application_restarts
Definition: memory_shared.h:95
#define PREDICT_TRUE(x)
Definition: clib.h:112
void vl_set_memory_uid(int uid)
unsigned long u64
Definition: types.h:89
void vl_set_global_pvt_heap_size(u64 size)
#define NULL
Definition: clib.h:58
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
void vl_unmap_shmem(void)
static void VL_MSG_API_POISON(const void *a)
Definition: api_common.h:159
u32 gc_mark_timestamp
message garbage collector mark TS
Definition: api_common.h:141
#define vec_terminate_c_string(V)
(If necessary) NULL terminate a vector containing a c-string.
Definition: vec.h:1017
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:523
static void vl_unmap_shmem_internal(u8 is_client)
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:561
int i
int api_uid
uid for the api shared memory region
Definition: api_common.h:306
void svm_region_unmap_client(void *rp_arg)
Definition: svm.c:1168
ring_alloc_t * client_rings
Definition: memory_shared.h:92
svm_queue_t * q
message allocated in this shmem ring
Definition: api_common.h:139
int vl_mem_api_can_send(svm_queue_t *q)
void svm_region_exit_client(void)
Definition: svm.c:1234
u8 data[0]
actual message begins here
Definition: api_common.h:142
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
struct msgbuf_ msgbuf_t
Message header structure.
void * vl_msg_api_alloc_zero_as_if_client(int nbytes)
void * vl_msg_api_alloc_zero(int nbytes)
void * vl_msg_api_alloc(int nbytes)
int api_gid
gid for the api shared memory region
Definition: api_common.h:309
unsigned char u8
Definition: types.h:56
void vl_msg_pop_heap_w_region(svm_region_t *vlib_rp, void *oldheap)
Definition: api_shared.c:1081
void vl_set_global_memory_size(u64 size)
int our_pid
Current process PID.
Definition: api_common.h:275
void svm_region_exit(void)
Definition: svm.c:1228
int svm_queue_sub(svm_queue_t *q, u8 *elem, svm_q_conditional_wait_t cond, u32 time)
Definition: queue.c:356
#define foreach_clnt_aring_size
Definition: memory_shared.h:71
static void * svm_push_data_heap(svm_region_t *rp)
Definition: svm.h:86
vl_api_registration_t ** vl_clients
vlib/vpp only: vector of client registrations
Definition: api_common.h:291
void * svm_region_find_or_create(svm_map_region_args_t *a)
Definition: svm.c:900
volatile void * user_ctx
Definition: svm_common.h:47
const char * root_path
Chroot path to the shared memory API files.
Definition: api_common.h:354
svm_region_t * vlib_rp
Current binary api segment descriptor.
Definition: api_common.h:278
struct vl_shmem_hdr_ * shmem_hdr
Binary API shared-memory segment header pointer.
Definition: api_common.h:288
unsigned int u32
Definition: types.h:88
svm_queue_t * rp
Definition: memory_shared.h:37
struct ring_alloc_ ring_alloc_t
void vl_set_memory_root_path(const char *name)
#define SVM_FLAGS_MHEAP
Definition: svm_common.h:27
volatile int vl_pid
Definition: memory_shared.h:81
void vl_register_mapped_shmem_region(svm_region_t *rp)
void vl_init_shmem(svm_region_t *vlib_rp, vl_api_shm_elem_config_t *config, int is_vlib, int is_private_region)
#define VL_API_INVALID_FI
Definition: api_common.h:77
int elog_trace_api_messages
Definition: api_common.h:370
void(** msg_print_handlers)(void *, void *)
Message print function vector.
Definition: api_common.h:239
unsigned short u16
Definition: types.h:57
u64 size
Definition: vhost_user.h:140
#define ELOG_DATA(em, f)
Definition: elog.h:484
#define PREDICT_FALSE(x)
Definition: clib.h:111
#define VL_SHM_VERSION
void vl_set_api_pvt_heap_size(u64 size)
elog_main_t * elog_main
event log
Definition: api_common.h:369
#define CLIB_NOSANITIZE_ADDR
Definition: sanitizer.h:45
API main structure, used by both vpp and binary API clients.
Definition: api_common.h:225
u64 global_size
size of the global VM region
Definition: api_common.h:315
u8 enabled
trace is enabled
Definition: api_common.h:93
An API client registration, only in vpp/vlib.
Definition: api_common.h:46
The fine-grained event logger allows lightweight, thread-safe event logging at minimum cost...
void vl_msg_api_send_shmem(svm_queue_t *q, u8 *elem)
#define DEBUG_MESSAGE_BUFFER_OVERRUN
Definition: memory_shared.c:44
void * vl_msg_push_heap_w_region(svm_region_t *vlib_rp)
Definition: api_shared.c:1067
void vl_msg_api_free_w_region(svm_region_t *vlib_rp, void *a)
ring_alloc_t * vl_rings
Definition: memory_shared.h:89
svmdb_client_t * c
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:213
static void * clib_mem_alloc_or_null(uword size)
Definition: mem.h:169
vl_api_ip4_address_t low
Definition: arp.api:36
u64 global_baseva
base virtual address for global VM region
Definition: api_common.h:312
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:342
#define clib_warning(format, args...)
Definition: error.h:59
void vl_msg_api_trace(api_main_t *am, vl_api_trace_t *tp, void *msg)
Definition: api_shared.c:76
void vl_set_memory_gid(int gid)
static void vl_msg_api_free_nolock(void *a)
void vl_msg_api_free(void *a)
#define ELOG_TYPE_DECLARE(f)
Definition: elog.h:442
svm_queue_t * vl_input_queue
Definition: memory_shared.h:84
string name[64]
Definition: ip.api:44
void vl_unmap_shmem_client(void)
vl_api_trace_t * tx_trace
Sent message trace configuration.
Definition: api_common.h:266
#define ASSERT(truth)
u8 data[128]
Definition: ipsec_types.api:87
u32 data_len
message length not including header
Definition: api_common.h:140
Message header structure.
Definition: api_common.h:137
svm_queue_t * svm_queue_alloc_and_init(int nels, int elsize, int consumer_pid)
Allocate and initialize svm queue.
Definition: queue.c:72
static void clib_mem_free(void *p)
Definition: mem.h:226
u64 global_pvt_heap_size
size of the global VM private mheap
Definition: api_common.h:321
static void vl_api_default_mem_config(vl_shmem_hdr_t *shmem_hdr)
static void * clib_mem_alloc(uword size)
Definition: mem.h:153
vl_api_ip4_address_t hi
Definition: arp.api:37
#define foreach_vl_aring_size
Definition: memory_shared.h:66
void vl_api_mem_config(vl_shmem_hdr_t *hdr, vl_api_shm_elem_config_t *config)
void(** msg_endian_handlers)(void *)
Message endian handler vector.
Definition: api_common.h:236
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
const char * name
Definition: svm_common.h:68
u64 uword
Definition: types.h:112
void svm_region_unmap(void *rp_arg)
Definition: svm.c:1162
void svm_client_scan_this_region_nolock(svm_region_t *rp)
Definition: svm.c:1240
int svm_queue_add_nolock(svm_queue_t *q, u8 *elem)
Definition: queue.c:200
static CLIB_NOSANITIZE_ADDR void * vl_msg_api_alloc_internal(svm_region_t *vlib_rp, int nbytes, int pool, int may_return_null)
Definition: memory_shared.c:47
struct _svm_queue svm_queue_t
void * vl_msg_api_alloc_as_if_client_or_null(int nbytes)
void * vl_mem_api_alloc_as_if_client_w_reg(vl_api_registration_t *reg, int nbytes)
static api_main_t * vlibapi_get_main(void)
Definition: api_common.h:378
void(** msg_handlers)(void *)
Message handler vector.
Definition: api_common.h:228
void vl_set_api_memory_size(u64 size)
#define vec_foreach(var, vec)
Vector iterator.
void * vl_msg_api_alloc_as_if_client(int nbytes)
void * vl_msg_api_alloc_or_null(int nbytes)
svm_region_t ** mapped_shmem_regions
Definition: api_common.h:285
void vl_msg_api_send_shmem_nolock(svm_queue_t *q, u8 *elem)
svm_region_t * vlib_rp
Definition: api_common.h:62
u32 vlib_input_queue_length
vpp/vlib input queue length
Definition: api_common.h:342
pthread_mutex_t mutex
Definition: svm_common.h:37
static CLIB_NOSANITIZE_ADDR void VL_MSG_API_UNPOISON(const void *a)
Definition: api_common.h:146
non-blocking call - works with both condvar and eventfd signaling
Definition: queue.h:44
static svm_region_t * root_rp
Definition: svm.c:46