summaryrefslogtreecommitdiffstats
path: root/.clang-format
diff options
context:
space:
mode:
authorSatoru Matsushima <satoru.matsushima@gmail.com>2020-01-16 09:16:39 +0000
committerOle Trøan <otroan@employees.org>2020-02-26 11:50:01 +0000
commitf712be54be8a24bea005280d6923cf856bc949c2 (patch)
tree15aca322a84725bdc95b10e999cddeb9b5205123 /.clang-format
parent1c684f9af219752cf1e5f30b7932094ab9d12551 (diff)
srv6-mobile: Cherry-pick the update document from stable/2001
Updating the document of srv6-mobile plugin code. This commit also fixes the following issues: - Doxygen build structure - No binary file included Type: docs Signed-off-by: Satoru Matsushima <satoru.matsushima@gmail.com> Change-Id: I376386ef6fc9584ab945db7358e3c4a698471e9b Signed-off-by: Satoru Matsushima <satoru.matsushima@gmail.com>
Diffstat (limited to '.clang-format')
0 files changed, 0 insertions, 0 deletions
='#n138'>138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 
/*
 *------------------------------------------------------------------
 * memclnt_shared.c - API message handling, common code for both clients
 * and the vlib process itself.
 *
 *
 * Copyright (c) 2009 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *------------------------------------------------------------------
 */

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <vppinfra/format.h>
#include <vppinfra/byte_order.h>
#include <vppinfra/error.h>
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vlibmemory/api.h>
#include <vlibmemory/unix_shared_memory_queue.h>

#include <vlibmemory/vl_memory_msg_enum.h>

#define vl_typedefs
#include <vlibmemory/vl_memory_api_h.h>
#undef vl_typedefs

static inline void *
vl_msg_api_alloc_internal (int nbytes, int pool, int may_return_null)
{
  int i;
  msgbuf_t *rv;
  ring_alloc_t *ap;
  unix_shared_memory_queue_t *q;
  void *oldheap;
  vl_shmem_hdr_t *shmem_hdr;
  api_main_t *am = &api_main;

  shmem_hdr = am->shmem_hdr;

  if (shmem_hdr == 0)
    {
      clib_warning ("shared memory header NULL");
      return 0;
    }

  /* account for the msgbuf_t header */
  nbytes += sizeof (msgbuf_t);

  if (shmem_hdr->vl_rings == 0)
    {
      clib_warning ("vl_rings NULL");
      ASSERT (0);
      abort ();
    }

  if (shmem_hdr->client_rings == 0)
    {
      clib_warning ("client_rings NULL");
      ASSERT (0);
      abort ();
    }

  ap = pool ? shmem_hdr->vl_rings : shmem_hdr->client_rings;
  for (i = 0; i < vec_len (ap); i++)
    {
      /* Too big? */
      if (nbytes > ap[i].size)
	{
	  continue;
	}

      q = ap[i].rp;
      if (pool == 0)
	{
	  pthread_mutex_lock (&q->mutex);
	}
      rv = (msgbuf_t *) (&q->data[0] + q->head * q->elsize);
      /*
       * Is this item still in use?
       */
      if (rv->q)
	{
	  u32 now = (u32) time (0);

	  if (PREDICT_TRUE (rv->gc_mark_timestamp == 0))
	    rv->gc_mark_timestamp = now;
	  else
	    {
	      if (now - rv->gc_mark_timestamp > 10)
		{
		  if (CLIB_DEBUG > 0)
		    clib_warning ("garbage collect pool %d ring %d index %d",
				  pool, i, q->head);
		  shmem_hdr->garbage_collects++;
		  goto collected;
		}
	    }


	  /* yes, loser; try next larger pool */
	  ap[i].misses++;
	  if (pool == 0)
	    pthread_mutex_unlock (&q->mutex);
	  continue;
	}
    collected:

      /* OK, we have a winner */
      ap[i].hits++;
      /*
       * Remember the source queue, although we
       * don't need to know the queue to free the item.
       */
      rv->q = q;
      rv->gc_mark_timestamp = 0;
      q->head++;
      if (q->head == q->maxsize)
	q->head = 0;

      if (pool == 0)
	pthread_mutex_unlock (&q->mutex);
      goto out;
    }

  /*
   * Request too big, or head element of all size-compatible rings
   * still in use. Fall back to shared-memory malloc.
   */
  am->ring_misses++;

  pthread_mutex_lock (&am->vlib_rp->mutex);
  oldheap = svm_push_data_heap (am->vlib_rp);
  if (may_return_null)
    {
      rv = clib_mem_alloc_or_null (nbytes);
      if (PREDICT_FALSE (rv == 0))
	{
	  svm_pop_heap (oldheap);
	  pthread_mutex_unlock (&am->vlib_rp->mutex);
	  return 0;
	}
    }
  else
    rv = clib_mem_alloc (nbytes);

  rv->q = 0;
  svm_pop_heap (oldheap);
  pthread_mutex_unlock (&am->vlib_rp->mutex);

out:
  rv->data_len = htonl (nbytes - sizeof (msgbuf_t));
  return (rv->data);
}

void *
vl_msg_api_alloc (int nbytes)
{
  int pool;
  api_main_t *am = &api_main;
  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;

  /*
   * Clients use pool-0, vlib proc uses pool 1
   */
  pool = (am->our_pid == shmem_hdr->vl_pid);
  return vl_msg_api_alloc_internal (nbytes, pool, 0 /* may_return_null */ );
}

void *
vl_msg_api_alloc_or_null (int nbytes)
{
  int pool;
  api_main_t *am = &api_main;
  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;

  pool = (am->our_pid == shmem_hdr->vl_pid);
  return vl_msg_api_alloc_internal (nbytes, pool, 1 /* may_return_null */ );
}

void *
vl_msg_api_alloc_as_if_client (int nbytes)
{
  return vl_msg_api_alloc_internal (nbytes, 0, 0 /* may_return_null */ );
}

void *
vl_msg_api_alloc_as_if_client_or_null (int nbytes)
{
  return vl_msg_api_alloc_internal (nbytes, 0, 1 /* may_return_null */ );
}

void
vl_msg_api_free (void *a)
{
  msgbuf_t *rv;
  void *oldheap;
  api_main_t *am = &api_main;

  rv = (msgbuf_t *) (((u8 *) a) - offsetof (msgbuf_t, data));

  /*
   * Here's the beauty of the scheme.  Only one proc/thread has
   * control of a given message buffer. To free a buffer, we just clear the
   * queue field, and leave. No locks, no hits, no errors...
   */
  if (rv->q)
    {
      rv->q = 0;
      rv->gc_mark_timestamp = 0;
      return;
    }

  pthread_mutex_lock (&am->vlib_rp->mutex);
  oldheap = svm_push_data_heap (am->vlib_rp);
  clib_mem_free (rv);
  svm_pop_heap (oldheap);
  pthread_mutex_unlock (&am->vlib_rp->mutex);
}

static void
vl_msg_api_free_nolock (void *a)
{
  msgbuf_t *rv;
  void *oldheap;
  api_main_t *am = &api_main;

  rv = (msgbuf_t *) (((u8 *) a) - offsetof (msgbuf_t, data));
  /*
   * Here's the beauty of the scheme.  Only one proc/thread has
   * control of a given message buffer. To free a buffer, we just clear the
   * queue field, and leave. No locks, no hits, no errors...
   */
  if (rv->q)
    {
      rv->q = 0;
      return;
    }

  oldheap = svm_push_data_heap (am->vlib_rp);
  clib_mem_free (rv);
  svm_pop_heap (oldheap);
}

void
vl_set_memory_root_path (char *name)
{
  api_main_t *am = &api_main;

  am->root_path = name;
}

void
vl_set_memory_uid (int uid)
{
  api_main_t *am = &api_main;

  am->api_uid = uid;
}

void
vl_set_memory_gid (int gid)
{
  api_main_t *am = &api_main;

  am->api_gid = gid;
}

void
vl_set_global_memory_baseva (u64 baseva)
{
  api_main_t *am = &api_main;

  am->global_baseva = baseva;
}

void
vl_set_global_memory_size (u64 size)
{
  api_main_t *am = &api_main;

  am->global_size = size;
}

void
vl_set_api_memory_size (u64 size)
{
  api_main_t *am = &api_main;

  am->api_size = size;
}

void
vl_set_global_pvt_heap_size (u64 size)
{
  api_main_t *am = &api_main;

  am->global_pvt_heap_size = size;
}

void
vl_set_api_pvt_heap_size (u64 size)
{
  api_main_t *am = &api_main;

  am->api_pvt_heap_size = size;
}

int
vl_map_shmem (char *region_name, int is_vlib)
{
  svm_map_region_args_t _a, *a = &_a;
  svm_region_t *vlib_rp, *root_rp;
  void *oldheap;
  vl_shmem_hdr_t *shmem_hdr = 0;
  api_main_t *am = &api_main;
  int i;
  struct timespec ts, tsrem;

  if (is_vlib == 0)
    svm_region_init_chroot (am->root_path);

  memset (a, 0, sizeof (*a));

  a->name = region_name;
  a->size = am->api_size ? am->api_size : (16 << 20);
  a->flags = SVM_FLAGS_MHEAP;
  a->uid = am->api_uid;
  a->gid = am->api_gid;
  a->pvt_heap_size = am->api_pvt_heap_size;

  vlib_rp = svm_region_find_or_create (a);

  if (vlib_rp == 0)
    return (-2);

  pthread_mutex_lock (&vlib_rp->mutex);
  /* Has someone else set up the shared-memory variable table? */
  if (vlib_rp->user_ctx)
    {
      am->shmem_hdr = (void *) vlib_rp->user_ctx;
      am->our_pid = getpid ();
      if (is_vlib)
	{
	  unix_shared_memory_queue_t *q;
	  uword old_msg;
	  /*
	   * application restart. Reset cached pids, API message
	   * rings, list of clients; otherwise, various things
	   * fail. (e.g. queue non-empty notification)
	   */

	  /* ghosts keep the region from disappearing properly */
	  svm_client_scan_this_region_nolock (vlib_rp);
	  am->shmem_hdr->application_restarts++;
	  q = am->shmem_hdr->vl_input_queue;
	  am->shmem_hdr->vl_pid = getpid ();
	  q->consumer_pid = am->shmem_hdr->vl_pid;
	  /* Drain the input queue, freeing msgs */
	  for (i = 0; i < 10; i++)
	    {
	      if (pthread_mutex_trylock (&q->mutex) == 0)
		{
		  pthread_mutex_unlock (&q->mutex);
		  goto mutex_ok;
		}
	      ts.tv_sec = 0;
	      ts.tv_nsec = 10000 * 1000;	/* 10 ms */
	      while (nanosleep (&ts, &tsrem) < 0)
		ts = tsrem;
	    }
	  /* Mutex buggered, "fix" it */
	  memset (&q->mutex, 0, sizeof (q->mutex));
	  clib_warning ("forcibly release main input queue mutex");

	mutex_ok:
	  am->vlib_rp = vlib_rp;
	  while (unix_shared_memory_queue_sub (q,
					       (u8 *) & old_msg,
					       1 /* nowait */ )
		 != -2 /* queue underflow */ )
	    {
	      vl_msg_api_free_nolock ((void *) old_msg);
	      am->shmem_hdr->restart_reclaims++;
	    }
	  pthread_mutex_unlock (&vlib_rp->mutex);
	  root_rp = svm_get_root_rp ();
	  ASSERT (root_rp);
	  /* Clean up the root region client list */
	  pthread_mutex_lock (&root_rp->mutex);
	  svm_client_scan_this_region_nolock (root_rp);
	  pthread_mutex_unlock (&root_rp->mutex);
	}
      else
	{
	  pthread_mutex_unlock (&vlib_rp->mutex);
	}
      am->vlib_rp = vlib_rp;
      vec_add1 (am->mapped_shmem_regions, vlib_rp);
      return 0;
    }
  /* Clients simply have to wait... */
  if (!is_vlib)
    {
      pthread_mutex_unlock (&vlib_rp->mutex);

      /* Wait up to 100 seconds... */
      for (i = 0; i < 10000; i++)
	{
	  ts.tv_sec = 0;
	  ts.tv_nsec = 10000 * 1000;	/* 10 ms */
	  while (nanosleep (&ts, &tsrem) < 0)
	    ts = tsrem;
	  if (vlib_rp->user_ctx)
	    goto ready;
	}
      /* Clean up and leave... */
      svm_region_unmap (vlib_rp);
      clib_warning ("region init fail");
      return (-2);

    ready:
      am->shmem_hdr = (void *) vlib_rp->user_ctx;
      am->our_pid = getpid ();
      am->vlib_rp = vlib_rp;
      vec_add1 (am->mapped_shmem_regions, vlib_rp);
      return 0;
    }

  /* Nope, it's our problem... */

  oldheap = svm_push_data_heap (vlib_rp);

  vec_validate (shmem_hdr, 0);
  shmem_hdr->version = VL_SHM_VERSION;

  /* vlib main input queue */
  shmem_hdr->vl_input_queue =
    unix_shared_memory_queue_init (1024, sizeof (uword), getpid (),
				   am->vlib_signal);

  /* Set up the msg ring allocator */
#define _(sz,n)                                                 \
    do {                                                        \
        ring_alloc_t _rp;                                       \
        _rp.rp = unix_shared_memory_queue_init ((n), (sz), 0, 0); \
        _rp.size = (sz);                                        \
        _rp.nitems = n;                                         \
        _rp.hits = 0;                                           \
        _rp.misses = 0;                                         \
        vec_add1(shmem_hdr->vl_rings, _rp);                     \
    } while (0);

  foreach_vl_aring_size;
#undef _

#define _(sz,n)                                                 \
    do {                                                        \
        ring_alloc_t _rp;                                       \
        _rp.rp = unix_shared_memory_queue_init ((n), (sz), 0, 0); \
        _rp.size = (sz);                                        \
        _rp.nitems = n;                                         \
        _rp.hits = 0;                                           \
        _rp.misses = 0;                                         \
        vec_add1(shmem_hdr->client_rings, _rp);                 \
    } while (0);

  foreach_clnt_aring_size;
#undef _

  am->shmem_hdr = shmem_hdr;
  am->vlib_rp = vlib_rp;
  am->our_pid = getpid ();
  if (is_vlib)
    am->shmem_hdr->vl_pid = am->our_pid;

  svm_pop_heap (oldheap);

  /*
   * After absolutely everything that a client might see is set up,
   * declare the shmem region valid
   */
  vlib_rp->user_ctx = shmem_hdr;

  pthread_mutex_unlock (&vlib_rp->mutex);
  vec_add1 (am->mapped_shmem_regions, vlib_rp);
  return 0;
}

void
vl_register_mapped_shmem_region (svm_region_t * rp)
{
  api_main_t *am = &api_main;

  vec_add1 (am->mapped_shmem_regions, rp);
}

void
vl_unmap_shmem (void)
{
  svm_region_t *rp;
  int i;
  api_main_t *am = &api_main;

  if (!svm_get_root_rp ())
    return;

  for (i = 0; i < vec_len (am->mapped_shmem_regions); i++)
    {
      rp = am->mapped_shmem_regions[i];
      svm_region_unmap (rp);
    }

  vec_free (am->mapped_shmem_regions);
  am->shmem_hdr = 0;

  svm_region_exit ();
  /* $$$ more careful cleanup, valgrind run... */
  vec_free (am->msg_handlers);
  vec_free (am->msg_endian_handlers);
  vec_free (am->msg_print_handlers);
}

void
vl_msg_api_send_shmem (unix_shared_memory_queue_t * q, u8 * elem)
{
  api_main_t *am = &api_main;
  uword *trace = (uword *) elem;

  if (am->tx_trace && am->tx_trace->enabled)
    vl_msg_api_trace (am, am->tx_trace, (void *) trace[0]);

  (void) unix_shared_memory_queue_add (q, elem, 0 /* nowait */ );
}

void
vl_msg_api_send_shmem_nolock (unix_shared_memory_queue_t * q, u8 * elem)
{
  api_main_t *am = &api_main;
  uword *trace = (uword *) elem;

  if (am->tx_trace && am->tx_trace->enabled)
    vl_msg_api_trace (am, am->tx_trace, (void *) trace[0]);

  (void) unix_shared_memory_queue_add_nolock (q, elem);
}

static void
vl_api_memclnt_create_reply_t_handler (vl_api_memclnt_create_reply_t * mp)
{
  serialize_main_t _sm, *sm = &_sm;
  api_main_t *am = &api_main;
  u8 *tblv;
  u32 nmsgs;
  int i;
  u8 *name_and_crc;
  u32 msg_index;

  am->my_client_index = mp->index;
  am->my_registration = (vl_api_registration_t *) (uword) mp->handle;

  /* Clean out any previous hash table (unlikely) */
  if (am->msg_index_by_name_and_crc)
    {
      int i;
      u8 **keys = 0;
      hash_pair_t *hp;
      /* *INDENT-OFF* */
      hash_foreach_pair (hp, am->msg_index_by_name_and_crc,
      ({
        vec_add1 (keys, (u8 *) hp->key);
      }));
      /* *INDENT-ON* */
      for (i = 0; i < vec_len (keys); i++)
	vec_free (keys[i]);
      vec_free (keys);
    }

  am->msg_index_by_name_and_crc = hash_create_string (0, sizeof (uword));

  /* Recreate the vnet-side API message handler table */
  tblv = (u8 *) mp->message_table;
  serialize_open_vector (sm, tblv);
  unserialize_integer (sm, &nmsgs, sizeof (u32));

  for (i = 0; i < nmsgs; i++)
    {
      msg_index = unserialize_likely_small_unsigned_integer (sm);
      unserialize_cstring (sm, (char **) &name_and_crc);
      hash_set_mem (am->msg_index_by_name_and_crc, name_and_crc, msg_index);
    }
}

u32
vl_api_get_msg_index (u8 * name_and_crc)
{
  api_main_t *am = &api_main;
  uword *p;

  if (am->msg_index_by_name_and_crc)
    {
      p = hash_get_mem (am->msg_index_by_name_and_crc, name_and_crc);
      if (p)
	return p[0];
    }
  return ~0;
}

int
vl_client_connect (char *name, int ctx_quota, int input_queue_size)
{
  svm_region_t *svm;
  vl_api_memclnt_create_t *mp;
  vl_api_memclnt_create_reply_t *rp;
  unix_shared_memory_queue_t *vl_input_queue;
  vl_shmem_hdr_t *shmem_hdr;
  int rv = 0;
  void *oldheap;
  api_main_t *am = &api_main;

  if (am->my_registration)
    {
      clib_warning ("client %s already connected...", name);
      return -1;
    }

  if (am->vlib_rp == 0)
    {
      clib_warning ("am->vlib_rp NULL");
      return -1;
    }

  svm = am->vlib_rp;
  shmem_hdr = am->shmem_hdr;

  if (shmem_hdr == 0 || shmem_hdr->vl_input_queue == 0)
    {
      clib_warning ("shmem_hdr / input queue NULL");
      return -1;
    }

  pthread_mutex_lock (&svm->mutex);
  oldheap = svm_push_data_heap (svm);
  vl_input_queue =
    unix_shared_memory_queue_init (input_queue_size, sizeof (uword),
				   getpid (), 0);
  pthread_mutex_unlock (&svm->mutex);
  svm_pop_heap (oldheap);

  am->my_client_index = ~0;
  am->my_registration = 0;
  am->vl_input_queue = vl_input_queue;

  mp = vl_msg_api_alloc (sizeof (vl_api_memclnt_create_t));
  memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_MEMCLNT_CREATE);
  mp->ctx_quota = ctx_quota;
  mp->input_queue = (uword) vl_input_queue;
  strncpy ((char *) mp->name, name, sizeof (mp->name) - 1);

  vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) & mp);

  while (1)
    {
      int qstatus;
      struct timespec ts, tsrem;
      int i;

      /* Wait up to 10 seconds */
      for (i = 0; i < 1000; i++)
	{
	  qstatus = unix_shared_memory_queue_sub (vl_input_queue, (u8 *) & rp,
						  1 /* nowait */ );
	  if (qstatus == 0)
	    goto read_one_msg;
	  ts.tv_sec = 0;
	  ts.tv_nsec = 10000 * 1000;	/* 10 ms */
	  while (nanosleep (&ts, &tsrem) < 0)
	    ts = tsrem;
	}
      /* Timeout... */
      clib_warning ("memclnt_create_reply timeout");
      return -1;

    read_one_msg:
      if (ntohs (rp->_vl_msg_id) != VL_API_MEMCLNT_CREATE_REPLY)
	{
	  clib_warning ("unexpected reply: id %d", ntohs (rp->_vl_msg_id));
	  continue;
	}
      rv = clib_net_to_host_u32 (rp->response);

      vl_msg_api_handler ((void *) rp);
      break;
    }
  return (rv);
}

static void
vl_api_memclnt_delete_reply_t_handler (vl_api_memclnt_delete_reply_t * mp)
{
  void *oldheap;
  api_main_t *am = &api_main;

  pthread_mutex_lock (&am->vlib_rp->mutex);
  oldheap = svm_push_data_heap (am->vlib_rp);
  unix_shared_memory_queue_free (am->vl_input_queue);
  pthread_mutex_unlock (&am->vlib_rp->mutex);
  svm_pop_heap (oldheap);

  am->my_client_index = ~0;
  am->my_registration = 0;
  am->vl_input_queue = 0;
}

void
vl_client_disconnect (void)
{
  vl_api_memclnt_delete_t *mp;
  vl_api_memclnt_delete_reply_t *rp;
  unix_shared_memory_queue_t *vl_input_queue;
  vl_shmem_hdr_t *shmem_hdr;
  time_t begin;
  api_main_t *am = &api_main;

  ASSERT (am->vlib_rp);
  shmem_hdr = am->shmem_hdr;
  ASSERT (shmem_hdr && shmem_hdr->vl_input_queue);

  vl_input_queue = am->vl_input_queue;

  mp = vl_msg_api_alloc (sizeof (vl_api_memclnt_delete_t));
  memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_MEMCLNT_DELETE);
  mp->index = am->my_client_index;
  mp->handle = (uword) am->my_registration;

  vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) & mp);

  /*
   * Have to be careful here, in case the client is disconnecting
   * because e.g. the vlib process died, or is unresponsive.
   */

  begin = time (0);
  while (1)
    {
      time_t now;

      now = time (0);

      if (now >= (begin + 2))
	{
	  clib_warning ("peer unresponsive, give up");
	  am->my_client_index = ~0;
	  am->my_registration = 0;
	  am->shmem_hdr = 0;
	  break;
	}
      if (unix_shared_memory_queue_sub (vl_input_queue, (u8 *) & rp, 1) < 0)
	continue;

      /* drain the queue */
      if (ntohs (rp->_vl_msg_id) != VL_API_MEMCLNT_DELETE_REPLY)
	{
	  vl_msg_api_handler ((void *) rp);
	  continue;
	}
      vl_msg_api_handler ((void *) rp);
      break;
    }
}

static inline vl_api_registration_t *
vl_api_client_index_to_registration_internal (u32 handle)
{
  vl_api_registration_t **regpp;
  vl_api_registration_t *regp;
  api_main_t *am = &api_main;
  u32 index;

  index = vl_msg_api_handle_get_index (handle);
  if ((am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK)
      != vl_msg_api_handle_get_epoch (handle))
    {
      vl_msg_api_increment_missing_client_counter ();
      return 0;
    }

  regpp = am->vl_clients + index;

  if (pool_is_free (am->vl_clients, regpp))
    {
      vl_msg_api_increment_missing_client_counter ();
      return 0;
    }
  regp = *regpp;
  return (regp);
}

vl_api_registration_t *
vl_api_client_index_to_registration (u32 index)
{
  return (vl_api_client_index_to_registration_internal (index));
}

unix_shared_memory_queue_t *
vl_api_client_index_to_input_queue (u32 index)
{
  vl_api_registration_t *regp;
  api_main_t *am = &api_main;

  /* Special case: vlib trying to send itself a message */
  if (index == (u32) ~ 0)
    return (am->shmem_hdr->vl_input_queue);

  regp = vl_api_client_index_to_registration_internal (index);
  if (!regp)
    return 0;
  return (regp->vl_input_queue);
}

#define foreach_api_client_msg                  \
_(MEMCLNT_CREATE_REPLY, memclnt_create_reply)   \
_(MEMCLNT_DELETE_REPLY, memclnt_delete_reply)

int
vl_client_api_map (char *region_name)
{
  int rv;

  if ((rv = vl_map_shmem (region_name, 0 /* is_vlib */ )) < 0)
    {
      return rv;
    }

#define _(N,n)                                                          \
    vl_msg_api_set_handlers(VL_API_##N, 0 /* name */,                   \
                           vl_api_##n##_t_handler,                      \
                           0/* cleanup */, 0/* endian */, 0/* print */, \
                           sizeof(vl_api_##n##_t), 1);
  foreach_api_client_msg;
#undef _
  return 0;
}

void
vl_client_api_unmap (void)
{
  vl_unmap_shmem ();
}

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */