vlib_api.c revision 39d69112
1/*
2 *------------------------------------------------------------------
3 * vlib_api.c VLIB API implementation
4 *
5 * Copyright (c) 2009 Cisco and/or its affiliates.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
9 *
10 *     http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *------------------------------------------------------------------
18 */
19
20#include <fcntl.h>
21#include <pthread.h>
22#include <vppinfra/vec.h>
23#include <vppinfra/hash.h>
24#include <vppinfra/pool.h>
25#include <vppinfra/format.h>
26#include <vppinfra/byte_order.h>
27#include <vppinfra/elog.h>
28#include <vlib/vlib.h>
29#include <vlib/unix/unix.h>
30#include <vlibapi/api.h>
31#include <vlibmemory/api.h>
32
33/**
34 * @file
35 * @brief Binary API messaging via shared memory
36 * Low-level, primary provisioning interface
37 */
38/*? %%clicmd:group_label Binary API CLI %% ?*/
39/*? %%syscfg:group_label Binary API configuration %% ?*/
40
41#define TRACE_VLIB_MEMORY_QUEUE 0
42
43#include <vlibmemory/vl_memory_msg_enum.h>	/* enumerate all vlib messages */
44
45#define vl_typedefs		/* define message structures */
46#include <vlibmemory/vl_memory_api_h.h>
47#undef vl_typedefs
48
49/* instantiate all the print functions we know about */
50#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
51#define vl_printfun
52#include <vlibmemory/vl_memory_api_h.h>
53#undef vl_printfun
54
55static inline void *
56vl_api_trace_plugin_msg_ids_t_print (vl_api_trace_plugin_msg_ids_t * a,
57				     void *handle)
58{
59  vl_print (handle, "vl_api_trace_plugin_msg_ids: %s first %u last %u\n",
60	    a->plugin_name,
61	    clib_host_to_net_u16 (a->first_msg_id),
62	    clib_host_to_net_u16 (a->last_msg_id));
63  return handle;
64}
65
66/* instantiate all the endian swap functions we know about */
67#define vl_endianfun
68#include <vlibmemory/vl_memory_api_h.h>
69#undef vl_endianfun
70
71static void
72vl_api_get_first_msg_id_t_handler (vl_api_get_first_msg_id_t * mp)
73{
74  vl_api_get_first_msg_id_reply_t *rmp;
75  vl_api_registration_t *regp;
76  uword *p;
77  api_main_t *am = vlibapi_get_main ();
78  vl_api_msg_range_t *rp;
79  u8 name[64];
80  u16 first_msg_id = ~0;
81  int rv = -7;			/* VNET_API_ERROR_INVALID_VALUE */
82
83  regp = vl_api_client_index_to_registration (mp->client_index);
84  if (!regp)
85    return;
86
87  if (am->msg_range_by_name == 0)
88    goto out;
89  strncpy ((char *) name, (char *) mp->name, ARRAY_LEN (name));
90  name[ARRAY_LEN (name) - 1] = '\0';
91  p = hash_get_mem (am->msg_range_by_name, name);
92  if (p == 0)
93    goto out;
94
95  rp = vec_elt_at_index (am->msg_ranges, p[0]);
96  first_msg_id = rp->first_msg_id;
97  rv = 0;
98
99out:
100  rmp = vl_msg_api_alloc (sizeof (*rmp));
101  rmp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID_REPLY);
102  rmp->context = mp->context;
103  rmp->retval = ntohl (rv);
104  rmp->first_msg_id = ntohs (first_msg_id);
105  vl_api_send_msg (regp, (u8 *) rmp);
106}
107
108void
109vl_api_api_versions_t_handler (vl_api_api_versions_t * mp)
110{
111  api_main_t *am = vlibapi_get_main ();
112  vl_api_api_versions_reply_t *rmp;
113  vl_api_registration_t *reg;
114  u32 nmsg = vec_len (am->api_version_list);
115  int msg_size = sizeof (*rmp) + sizeof (rmp->api_versions[0]) * nmsg;
116  int i;
117
118  reg = vl_api_client_index_to_registration (mp->client_index);
119  if (!reg)
120    return;
121
122  rmp = vl_msg_api_alloc (msg_size);
123  clib_memset (rmp, 0, msg_size);
124  rmp->_vl_msg_id = ntohs (VL_API_API_VERSIONS_REPLY);
125
126  /* fill in the message */
127  rmp->context = mp->context;
128  rmp->count = htonl (nmsg);
129
130  for (i = 0; i < nmsg; ++i)
131    {
132      api_version_t *vl = &am->api_version_list[i];
133      rmp->api_versions[i].major = htonl (vl->major);
134      rmp->api_versions[i].minor = htonl (vl->minor);
135      rmp->api_versions[i].patch = htonl (vl->patch);
136      strncpy ((char *) rmp->api_versions[i].name, vl->name,
137	       ARRAY_LEN (rmp->api_versions[i].name));
138      rmp->api_versions[i].name[ARRAY_LEN (rmp->api_versions[i].name) - 1] =
139	'\0';
140    }
141
142  vl_api_send_msg (reg, (u8 *) rmp);
143}
144
145#define foreach_vlib_api_msg				\
146_(GET_FIRST_MSG_ID, get_first_msg_id)			\
147_(API_VERSIONS, api_versions)
148
149/*
150 * vl_api_init
151 */
152static int
153vlib_api_init (void)
154{
155  vl_msg_api_msg_config_t cfg;
156  vl_msg_api_msg_config_t *c = &cfg;
157
158  clib_memset (c, 0, sizeof (*c));
159
160#define _(N,n) do {                                             \
161    c->id = VL_API_##N;                                         \
162    c->name = #n;                                               \
163    c->handler = vl_api_##n##_t_handler;                        \
164    c->cleanup = vl_noop_handler;                               \
165    c->endian = vl_api_##n##_t_endian;                          \
166    c->print = vl_api_##n##_t_print;                            \
167    c->size = sizeof(vl_api_##n##_t);                           \
168    c->traced = 1; /* trace, so these msgs print */             \
169    c->replay = 0; /* don't replay client create/delete msgs */ \
170    c->message_bounce = 0; /* don't bounce this message */	\
171    vl_msg_api_config(c);} while (0);
172
173  foreach_vlib_api_msg;
174#undef _
175
176  return 0;
177}
178
179u64 vector_rate_histogram[SLEEP_N_BUCKETS];
180
181/*
182 * Callback to send ourselves a plugin numbering-space trace msg
183 */
184static void
185send_one_plugin_msg_ids_msg (u8 * name, u16 first_msg_id, u16 last_msg_id)
186{
187  vl_api_trace_plugin_msg_ids_t *mp;
188  api_main_t *am = vlibapi_get_main ();
189  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
190  svm_queue_t *q;
191
192  mp = vl_msg_api_alloc_as_if_client (sizeof (*mp));
193  clib_memset (mp, 0, sizeof (*mp));
194
195  mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_TRACE_PLUGIN_MSG_IDS);
196  strncpy ((char *) mp->plugin_name, (char *) name,
197	   sizeof (mp->plugin_name) - 1);
198  mp->first_msg_id = clib_host_to_net_u16 (first_msg_id);
199  mp->last_msg_id = clib_host_to_net_u16 (last_msg_id);
200
201  q = shmem_hdr->vl_input_queue;
202
203  vl_msg_api_send_shmem (q, (u8 *) & mp);
204}
205
206void
207vl_api_save_msg_table (void)
208{
209  u8 *serialized_message_table;
210  api_main_t *am = vlibapi_get_main ();
211  u8 *chroot_file;
212  int fd, rv;
213
214  /*
215   * Snapshoot the api message table.
216   */
217  if (strstr ((char *) am->save_msg_table_filename, "..")
218      || index ((char *) am->save_msg_table_filename, '/'))
219    {
220      clib_warning ("illegal save-message-table filename '%s'",
221		    am->save_msg_table_filename);
222      return;
223    }
224
225  chroot_file = format (0, "/tmp/%s%c", am->save_msg_table_filename, 0);
226
227  fd = creat ((char *) chroot_file, 0644);
228
229  if (fd < 0)
230    {
231      clib_unix_warning ("creat");
232      return;
233    }
234
235  serialized_message_table = vl_api_serialize_message_table (am, 0);
236
237  rv = write (fd, serialized_message_table,
238	      vec_len (serialized_message_table));
239
240  if (rv != vec_len (serialized_message_table))
241    clib_unix_warning ("write");
242
243  rv = close (fd);
244  if (rv < 0)
245    clib_unix_warning ("close");
246
247  vec_free (chroot_file);
248  vec_free (serialized_message_table);
249}
250
251static uword
252vl_api_clnt_process (vlib_main_t * vm, vlib_node_runtime_t * node,
253		     vlib_frame_t * f)
254{
255  int private_segment_rotor = 0, i, rv;
256  vl_socket_args_for_process_t *a;
257  vl_shmem_hdr_t *shm;
258  svm_queue_t *q;
259  clib_error_t *e;
260  api_main_t *am = vlibapi_get_main ();
261  f64 dead_client_scan_time;
262  f64 sleep_time, start_time;
263  f64 vector_rate;
264  clib_error_t *error;
265  uword event_type;
266  uword *event_data = 0;
267  f64 now;
268
269  if ((error = vl_sock_api_init (vm)))
270    {
271      clib_error_report (error);
272      clib_warning ("socksvr_api_init failed, quitting...");
273      return 0;
274    }
275
276  if ((rv = vlib_api_init ()) < 0)
277    {
278      clib_warning ("vlib_api_init returned %d, quitting...", rv);
279      return 0;
280    }
281
282  shm = am->shmem_hdr;
283  q = shm->vl_input_queue;
284
285  e = vlib_call_init_exit_functions
286    (vm, &vm->api_init_function_registrations, 1 /* call_once */ );
287  if (e)
288    clib_error_report (e);
289
290  sleep_time = 10.0;
291  dead_client_scan_time = vlib_time_now (vm) + 10.0;
292
293  /*
294   * Send plugin message range messages for each plugin we loaded
295   */
296  for (i = 0; i < vec_len (am->msg_ranges); i++)
297    {
298      vl_api_msg_range_t *rp = am->msg_ranges + i;
299      send_one_plugin_msg_ids_msg (rp->name, rp->first_msg_id,
300				   rp->last_msg_id);
301    }
302
303  /*
304   * Save the api message table snapshot, if configured
305   */
306  if (am->save_msg_table_filename)
307    vl_api_save_msg_table ();
308
309  /* $$$ pay attention to frame size, control CPU usage */
310  while (1)
311    {
312      /*
313       * There's a reason for checking the queue before
314       * sleeping. If the vlib application crashes, it's entirely
315       * possible for a client to enqueue a connect request
316       * during the process restart interval.
317       *
318       * Unless some force of physics causes the new incarnation
319       * of the application to process the request, the client will
320       * sit and wait for Godot...
321       */
322      vector_rate = (f64) vlib_last_vectors_per_main_loop (vm);
323      start_time = vlib_time_now (vm);
324      while (1)
325	{
326	  if (vl_mem_api_handle_rpc (vm, node)
327	      || vl_mem_api_handle_msg_main (vm, node))
328	    {
329	      vm->api_queue_nonempty = 0;
330	      VL_MEM_API_LOG_Q_LEN ("q-underflow: len %d", 0);
331	      sleep_time = 20.0;
332	      break;
333	    }
334
335	  /* Allow no more than 10us without a pause */
336	  if (vlib_time_now (vm) > start_time + 10e-6)
337	    {
338	      int index = SLEEP_400_US;
339	      if (vector_rate > 40.0)
340		sleep_time = 400e-6;
341	      else if (vector_rate > 20.0)
342		{
343		  index = SLEEP_200_US;
344		  sleep_time = 200e-6;
345		}
346	      else if (vector_rate >= 1.0)
347		{
348		  index = SLEEP_100_US;
349		  sleep_time = 100e-6;
350		}
351	      else
352		{
353		  index = SLEEP_10_US;
354		  sleep_time = 10e-6;
355		}
356	      vector_rate_histogram[index] += 1;
357	      break;
358	    }
359	}
360
361      /*
362       * see if we have any private api shared-memory segments
363       * If so, push required context variables, and process
364       * a message.
365       */
366      if (PREDICT_FALSE (vec_len (am->vlib_private_rps)))
367	{
368	  if (private_segment_rotor >= vec_len (am->vlib_private_rps))
369	    private_segment_rotor = 0;
370	  vl_mem_api_handle_msg_private (vm, node, private_segment_rotor++);
371	}
372
373      vlib_process_wait_for_event_or_clock (vm, sleep_time);
374      vec_reset_length (event_data);
375      event_type = vlib_process_get_events (vm, &event_data);
376      now = vlib_time_now (vm);
377
378      switch (event_type)
379	{
380	case QUEUE_SIGNAL_EVENT:
381	  vm->queue_signal_pending = 0;
382	  VL_MEM_API_LOG_Q_LEN ("q-awake: len %d", q->cursize);
383
384	  break;
385	case SOCKET_READ_EVENT:
386	  for (i = 0; i < vec_len (event_data); i++)
387	    {
388	      vl_api_registration_t *regp;
389
390	      a = pool_elt_at_index (socket_main.process_args, event_data[i]);
391	      regp = vl_socket_get_registration (a->reg_index);
392	      if (regp)
393		{
394		  vl_socket_process_api_msg (regp, (i8 *) a->data);
395		  a = pool_elt_at_index (socket_main.process_args,
396					 event_data[i]);
397		}
398	      vec_free (a->data);
399	      pool_put (socket_main.process_args, a);
400	    }
401	  break;
402
403	  /* Timeout... */
404	case -1:
405	  break;
406
407	default:
408	  clib_warning ("unknown event type %d", event_type);
409	  break;
410	}
411
412      if (now > dead_client_scan_time)
413	{
414	  vl_mem_api_dead_client_scan (am, shm, now);
415	  dead_client_scan_time = vlib_time_now (vm) + 10.0;
416	}
417    }
418
419  return 0;
420}
421/* *INDENT-OFF* */
422VLIB_REGISTER_NODE (vl_api_clnt_node) =
423{
424  .function = vl_api_clnt_process,
425  .type = VLIB_NODE_TYPE_PROCESS,
426  .name = "api-rx-from-ring",
427  .state = VLIB_NODE_STATE_DISABLED,
428};
429/* *INDENT-ON* */
430
431void
432vl_mem_api_enable_disable (vlib_main_t * vm, int enable)
433{
434  vlib_node_set_state (vm, vl_api_clnt_node.index,
435		       (enable
436			? VLIB_NODE_STATE_POLLING
437			: VLIB_NODE_STATE_DISABLED));
438}
439
440static uword
441api_rx_from_node (vlib_main_t * vm,
442		  vlib_node_runtime_t * node, vlib_frame_t * frame)
443{
444  uword n_packets = frame->n_vectors;
445  uword n_left_from;
446  u32 *from;
447  static u8 *long_msg;
448
449  vec_validate (long_msg, 4095);
450  n_left_from = frame->n_vectors;
451  from = vlib_frame_vector_args (frame);
452
453  while (n_left_from > 0)
454    {
455      u32 bi0;
456      vlib_buffer_t *b0;
457      void *msg;
458      uword msg_len;
459
460      bi0 = from[0];
461      b0 = vlib_get_buffer (vm, bi0);
462      from += 1;
463      n_left_from -= 1;
464
465      msg = b0->data + b0->current_data;
466      msg_len = b0->current_length;
467      if (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
468	{
469	  ASSERT (long_msg != 0);
470	  _vec_len (long_msg) = 0;
471	  vec_add (long_msg, msg, msg_len);
472	  while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
473	    {
474	      b0 = vlib_get_buffer (vm, b0->next_buffer);
475	      msg = b0->data + b0->current_data;
476	      msg_len = b0->current_length;
477	      vec_add (long_msg, msg, msg_len);
478	    }
479	  msg = long_msg;
480	}
481      vl_msg_api_handler_no_trace_no_free (msg);
482    }
483
484  /* Free what we've been given. */
485  vlib_buffer_free (vm, vlib_frame_vector_args (frame), n_packets);
486
487  return n_packets;
488}
489
490/* *INDENT-OFF* */
491VLIB_REGISTER_NODE (api_rx_from_node_node,static) = {
492    .function = api_rx_from_node,
493    .type = VLIB_NODE_TYPE_INTERNAL,
494    .vector_size = 4,
495    .name = "api-rx-from-node",
496};
497/* *INDENT-ON* */
498
499static void
500vl_api_rpc_call_t_handler (vl_api_rpc_call_t * mp)
501{
502  vl_api_rpc_call_reply_t *rmp;
503  int (*fp) (void *);
504  i32 rv = 0;
505  vlib_main_t *vm = vlib_get_main ();
506
507  if (mp->function == 0)
508    {
509      rv = -1;
510      clib_warning ("rpc NULL function pointer");
511    }
512
513  else
514    {
515      if (mp->need_barrier_sync)
516	vlib_worker_thread_barrier_sync (vm);
517
518      fp = uword_to_pointer (mp->function, int (*)(void *));
519      rv = fp (mp->data);
520
521      if (mp->need_barrier_sync)
522	vlib_worker_thread_barrier_release (vm);
523    }
524
525  if (mp->send_reply)
526    {
527      svm_queue_t *q = vl_api_client_index_to_input_queue (mp->client_index);
528      if (q)
529	{
530	  rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
531	  rmp->_vl_msg_id = ntohs (VL_API_RPC_CALL_REPLY);
532	  rmp->context = mp->context;
533	  rmp->retval = rv;
534	  vl_msg_api_send_shmem (q, (u8 *) & rmp);
535	}
536    }
537  if (mp->multicast)
538    {
539      clib_warning ("multicast not yet implemented...");
540    }
541}
542
543static void
544vl_api_rpc_call_reply_t_handler (vl_api_rpc_call_reply_t * mp)
545{
546  clib_warning ("unimplemented");
547}
548
549void
550vl_api_send_pending_rpc_requests (vlib_main_t * vm)
551{
552  vlib_main_t *vm_global = &vlib_global_main;
553
554  ASSERT (vm != vm_global);
555
556  clib_spinlock_lock_if_init (&vm_global->pending_rpc_lock);
557  vec_append (vm_global->pending_rpc_requests, vm->pending_rpc_requests);
558  vec_reset_length (vm->pending_rpc_requests);
559  clib_spinlock_unlock_if_init (&vm_global->pending_rpc_lock);
560}
561
562always_inline void
563vl_api_rpc_call_main_thread_inline (void *fp, u8 * data, u32 data_length,
564				    u8 force_rpc)
565{
566  vl_api_rpc_call_t *mp;
567  vlib_main_t *vm_global = &vlib_global_main;
568  vlib_main_t *vm = vlib_get_main ();
569
570  /* Main thread and not a forced RPC: call the function directly */
571  if ((force_rpc == 0) && (vlib_get_thread_index () == 0))
572    {
573      void (*call_fp) (void *);
574
575      vlib_worker_thread_barrier_sync (vm);
576
577      call_fp = fp;
578      call_fp (data);
579
580      vlib_worker_thread_barrier_release (vm);
581      return;
582    }
583
584  /* Otherwise, actually do an RPC */
585  mp = vl_msg_api_alloc_as_if_client (sizeof (*mp) + data_length);
586
587  clib_memset (mp, 0, sizeof (*mp));
588  clib_memcpy_fast (mp->data, data, data_length);
589  mp->_vl_msg_id = ntohs (VL_API_RPC_CALL);
590  mp->function = pointer_to_uword (fp);
591  mp->need_barrier_sync = 1;
592
593  /* Add to the pending vector. Thread 0 requires locking. */
594  if (vm == vm_global)
595    clib_spinlock_lock_if_init (&vm_global->pending_rpc_lock);
596  vec_add1 (vm->pending_rpc_requests, (uword) mp);
597  if (vm == vm_global)
598    clib_spinlock_unlock_if_init (&vm_global->pending_rpc_lock);
599}
600
601/*
602 * Check if called from worker threads.
603 * If so, make rpc call of fp through shmem.
604 * Otherwise, call fp directly
605 */
606void
607vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
608{
609  vl_api_rpc_call_main_thread_inline (fp, data, data_length,	/*force_rpc */
610				      0);
611}
612
613/*
614 * Always make rpc call of fp through shmem, useful for calling from threads
615 * not setup as worker threads, such as DPDK callback thread
616 */
617void
618vl_api_force_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
619{
620  vl_api_rpc_call_main_thread_inline (fp, data, data_length,	/*force_rpc */
621				      1);
622}
623
624static void
625vl_api_trace_plugin_msg_ids_t_handler (vl_api_trace_plugin_msg_ids_t * mp)
626{
627  api_main_t *am = vlibapi_get_main ();
628  vl_api_msg_range_t *rp;
629  uword *p;
630
631  /* Noop (except for tracing) during normal operation */
632  if (am->replay_in_progress == 0)
633    return;
634
635  p = hash_get_mem (am->msg_range_by_name, mp->plugin_name);
636  if (p == 0)
637    {
638      clib_warning ("WARNING: traced plugin '%s' not in current image",
639		    mp->plugin_name);
640      return;
641    }
642
643  rp = vec_elt_at_index (am->msg_ranges, p[0]);
644  if (rp->first_msg_id != clib_net_to_host_u16 (mp->first_msg_id))
645    {
646      clib_warning ("WARNING: traced plugin '%s' first message id %d not %d",
647		    mp->plugin_name, clib_net_to_host_u16 (mp->first_msg_id),
648		    rp->first_msg_id);
649    }
650
651  if (rp->last_msg_id != clib_net_to_host_u16 (mp->last_msg_id))
652    {
653      clib_warning ("WARNING: traced plugin '%s' last message id %d not %d",
654		    mp->plugin_name, clib_net_to_host_u16 (mp->last_msg_id),
655		    rp->last_msg_id);
656    }
657}
658
659#define foreach_rpc_api_msg                     \
660_(RPC_CALL,rpc_call)                            \
661_(RPC_CALL_REPLY,rpc_call_reply)
662
663#define foreach_plugin_trace_msg		\
664_(TRACE_PLUGIN_MSG_IDS,trace_plugin_msg_ids)
665
666/*
667 * Set the rpc callback at our earliest possible convenience.
668 * This avoids ordering issues between thread_init() -> start_workers and
669 * an init function which we could define here. If we ever intend to use
670 * vlib all by itself, we can't create a link-time dependency on
671 * an init function here and a typical "call foo_init first"
672 * guitar lick.
673 */
674
675extern void *rpc_call_main_thread_cb_fn;
676
677static clib_error_t *
678rpc_api_hookup (vlib_main_t * vm)
679{
680  api_main_t *am = vlibapi_get_main ();
681#define _(N,n)                                                  \
682    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
683                           vl_api_##n##_t_handler,              \
684                           vl_noop_handler,                     \
685                           vl_noop_handler,			\
686                           vl_api_##n##_t_print,                \
687                           sizeof(vl_api_##n##_t), 0 /* do not trace */);
688  foreach_rpc_api_msg;
689#undef _
690
691#define _(N,n)                                                  \
692    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
693                           vl_api_##n##_t_handler,              \
694                           vl_noop_handler,                     \
695                           vl_noop_handler,			\
696                           vl_api_##n##_t_print,                \
697                           sizeof(vl_api_##n##_t), 1 /* do trace */);
698  foreach_plugin_trace_msg;
699#undef _
700
701  /* No reason to halt the parade to create a trace record... */
702  am->is_mp_safe[VL_API_TRACE_PLUGIN_MSG_IDS] = 1;
703  rpc_call_main_thread_cb_fn = vl_api_rpc_call_main_thread;
704  return 0;
705}
706
707VLIB_API_INIT_FUNCTION (rpc_api_hookup);
708
709/*
710 * fd.io coding-style-patch-verification: ON
711 *
712 * Local Variables:
713 * eval: (c-set-style "gnu")
714 * End:
715 */
716