FD.io VPP  v19.01.3-6-g70449b9b9
Vector Packet Processing
session_cli.c
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1 /*
2  * Copyright (c) 2017 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
16 #include <vnet/session/session.h>
17 
18 u8 *
19 format_session_fifos (u8 * s, va_list * args)
20 {
21  stream_session_t *ss = va_arg (*args, stream_session_t *);
22  int verbose = va_arg (*args, int);
23  session_event_t _e, *e = &_e;
24  u8 found;
25 
26  if (!ss->server_rx_fifo || !ss->server_tx_fifo)
27  return s;
28 
29  s = format (s, " Rx fifo: %U", format_svm_fifo, ss->server_rx_fifo,
30  verbose);
31  if (verbose > 2 && ss->server_rx_fifo->has_event)
32  {
33  found = session_node_lookup_fifo_event (ss->server_rx_fifo, e);
34  s = format (s, " session node event: %s\n",
35  found ? "found" : "not found");
36  }
37  s = format (s, " Tx fifo: %U", format_svm_fifo, ss->server_tx_fifo,
38  verbose);
39  if (verbose > 2 && ss->server_tx_fifo->has_event)
40  {
41  found = session_node_lookup_fifo_event (ss->server_tx_fifo, e);
42  s = format (s, " session node event: %s\n",
43  found ? "found" : "not found");
44  }
45  return s;
46 }
47 
48 /**
49  * Format stream session as per the following format
50  *
51  * verbose:
52  * "Connection", "Rx fifo", "Tx fifo", "Session Index"
53  * non-verbose:
54  * "Connection"
55  */
56 u8 *
57 format_stream_session (u8 * s, va_list * args)
58 {
59  stream_session_t *ss = va_arg (*args, stream_session_t *);
60  int verbose = va_arg (*args, int);
62  u8 *str = 0;
63 
64  if (verbose == 1 && ss->session_state >= SESSION_STATE_ACCEPTING)
65  str = format (0, "%-10u%-10u",
66  svm_fifo_max_dequeue (ss->server_rx_fifo),
67  svm_fifo_max_dequeue (ss->server_tx_fifo));
68 
69  if (ss->session_state >= SESSION_STATE_ACCEPTING)
70  {
71  s = format (s, "%U", format_transport_connection, tp,
72  ss->connection_index, ss->thread_index, verbose);
73  if (verbose == 1)
74  s = format (s, "%v", str);
75  if (verbose > 1)
76  s = format (s, "%U", format_session_fifos, ss, verbose);
77  }
78  else if (ss->session_state == SESSION_STATE_LISTENING)
79  {
80  s = format (s, "%-40U%v", format_transport_listen_connection,
81  tp, ss->connection_index, str);
82  if (verbose > 1)
83  s = format (s, "\n%U", format_session_fifos, ss, verbose);
84  }
85  else if (ss->session_state == SESSION_STATE_CONNECTING)
86  {
88  tp, ss->connection_index, str);
89  }
90  else
91  {
92  clib_warning ("Session in state: %d!", ss->session_state);
93  }
94  vec_free (str);
95 
96  return s;
97 }
98 
99 uword
101 {
102  u8 *proto = va_arg (*args, u8 *);
103  u32 *fib_index = va_arg (*args, u32 *);
104  ip46_address_t *lcl = va_arg (*args, ip46_address_t *);
105  ip46_address_t *rmt = va_arg (*args, ip46_address_t *);
106  u16 *lcl_port = va_arg (*args, u16 *);
107  u16 *rmt_port = va_arg (*args, u16 *);
108  u8 *is_ip4 = va_arg (*args, u8 *);
109  u8 tuple_is_set = 0;
110  u32 vrf = ~0;
111 
112  clib_memset (lcl, 0, sizeof (*lcl));
113  clib_memset (rmt, 0, sizeof (*rmt));
114 
115  if (unformat (input, "tcp"))
116  {
117  *proto = TRANSPORT_PROTO_TCP;
118  }
119  else if (unformat (input, "udp"))
120  {
121  *proto = TRANSPORT_PROTO_UDP;
122  }
123  else
124  return 0;
125 
126  if (unformat (input, "vrf %u", &vrf))
127  ;
128 
129  if (unformat (input, "%U:%d->%U:%d", unformat_ip4_address, &lcl->ip4,
130  lcl_port, unformat_ip4_address, &rmt->ip4, rmt_port))
131  {
132  *is_ip4 = 1;
133  tuple_is_set = 1;
134  }
135  else if (unformat (input, "%U:%d->%U:%d", unformat_ip6_address, &lcl->ip6,
136  lcl_port, unformat_ip6_address, &rmt->ip6, rmt_port))
137  {
138  *is_ip4 = 0;
139  tuple_is_set = 1;
140  }
141 
142  if (vrf != ~0)
143  {
144  fib_protocol_t fib_proto;
145  fib_proto = *is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
146  *fib_index = fib_table_find (fib_proto, vrf);
147  }
148 
149  return tuple_is_set;
150 }
151 
152 uword
153 unformat_stream_session (unformat_input_t * input, va_list * args)
154 {
155  stream_session_t **result = va_arg (*args, stream_session_t **);
156  u32 lcl_port = 0, rmt_port = 0, fib_index = 0;
157  ip46_address_t lcl, rmt;
158  stream_session_t *s;
159  u8 proto = ~0;
160  u8 is_ip4 = 0;
161 
162  if (!unformat (input, "%U", unformat_stream_session_id, &proto, &fib_index,
163  &lcl, &rmt, &lcl_port, &rmt_port, &is_ip4))
164  return 0;
165 
166  if (is_ip4)
167  s = session_lookup_safe4 (fib_index, &lcl.ip4, &rmt.ip4,
168  clib_host_to_net_u16 (lcl_port),
169  clib_host_to_net_u16 (rmt_port), proto);
170  else
171  s = session_lookup_safe6 (fib_index, &lcl.ip6, &rmt.ip6,
172  clib_host_to_net_u16 (lcl_port),
173  clib_host_to_net_u16 (rmt_port), proto);
174  if (s)
175  {
176  *result = s;
177  session_pool_remove_peeker (s->thread_index);
178  return 1;
179  }
180  return 0;
181 }
182 
183 uword
185 {
186  transport_connection_t **result = va_arg (*args, transport_connection_t **);
187  u32 suggested_proto = va_arg (*args, u32);
189  u8 proto = ~0;
190  ip46_address_t lcl, rmt;
191  u32 lcl_port = 0, rmt_port = 0, fib_index = 0;
192  u8 is_ip4 = 0;
193 
194  if (!unformat (input, "%U", unformat_stream_session_id, &fib_index, &proto,
195  &lcl, &rmt, &lcl_port, &rmt_port, &is_ip4))
196  return 0;
197 
198  proto = (proto == (u8) ~ 0) ? suggested_proto : proto;
199  if (proto == (u8) ~ 0)
200  return 0;
201  if (is_ip4)
202  tc = session_lookup_connection4 (fib_index, &lcl.ip4, &rmt.ip4,
203  clib_host_to_net_u16 (lcl_port),
204  clib_host_to_net_u16 (rmt_port), proto);
205  else
206  tc = session_lookup_connection6 (fib_index, &lcl.ip6, &rmt.ip6,
207  clib_host_to_net_u16 (lcl_port),
208  clib_host_to_net_u16 (rmt_port), proto);
209 
210  if (tc)
211  {
212  *result = tc;
213  return 1;
214  }
215  return 0;
216 }
217 
218 static clib_error_t *
220  vlib_cli_command_t * cmd)
221 {
222  u8 *str = 0, one_session = 0, do_listeners = 0, sst, do_elog = 0;
224  u32 transport_proto = ~0, track_index;
225  stream_session_t *pool, *s;
227  app_worker_t *app_wrk;
228  int verbose = 0, i;
229  const u8 *app_name;
230 
231  if (!smm->is_enabled)
232  {
233  return clib_error_return (0, "session layer is not enabled");
234  }
235 
237  {
238  if (unformat (input, "verbose %d", &verbose))
239  ;
240  else if (unformat (input, "verbose"))
241  verbose = 1;
242  else if (unformat (input, "listeners %U", unformat_transport_proto,
243  &transport_proto))
244  do_listeners = 1;
245  else if (unformat (input, "%U", unformat_stream_session, &s))
246  {
247  one_session = 1;
248  }
249  else if (unformat (input, "elog"))
250  do_elog = 1;
251  else
252  return clib_error_return (0, "unknown input `%U'",
253  format_unformat_error, input);
254  }
255 
256  if (one_session)
257  {
258  str = format (0, "%U", format_stream_session, s, 3);
259  if (do_elog && s->session_state != SESSION_STATE_LISTENING)
260  {
261  elog_main_t *em = &vm->elog_main;
262  f64 dt;
263 
264  tc = session_get_transport (s);
265  track_index = transport_elog_track_index (tc);
266  dt = (em->init_time.cpu - vm->clib_time.init_cpu_time)
268  if (track_index != ~0)
269  str = format (str, " session elog:\n%U", format_elog_track, em,
270  dt, track_index);
271  }
272  vlib_cli_output (vm, "%v", str);
273  return 0;
274  }
275 
276  if (do_listeners)
277  {
278  sst = session_type_from_proto_and_ip (transport_proto, 1);
279  vlib_cli_output (vm, "%-40s%-24s", "Listener", "App");
280  /* *INDENT-OFF* */
281  pool_foreach (s, smm->wrk[0].sessions, ({
282  if (s->session_state != SESSION_STATE_LISTENING
283  || s->session_type != sst)
284  continue;
285  app_wrk = app_worker_get (s->app_wrk_index);
286  app_name = application_name_from_index (app_wrk->app_index);
287  vlib_cli_output (vm, "%U%-25v%", format_stream_session, s, 1,
288  app_name);
289  }));
290  /* *INDENT-ON* */
291  return 0;
292  }
293 
294  for (i = 0; i < vec_len (smm->wrk); i++)
295  {
296  u32 once_per_pool;
297  pool = smm->wrk[i].sessions;
298 
299  once_per_pool = 1;
300 
301  if (pool_elts (pool))
302  {
303 
304  vlib_cli_output (vm, "Thread %d: %d active sessions",
305  i, pool_elts (pool));
306  if (verbose)
307  {
308  if (once_per_pool && verbose == 1)
309  {
310  str = format (str, "%-50s%-15s%-10s%-10s",
311  "Connection", "State", "Rx-f", "Tx-f");
312  vlib_cli_output (vm, "%v", str);
313  vec_reset_length (str);
314  once_per_pool = 0;
315  }
316 
317  /* *INDENT-OFF* */
318  pool_foreach (s, pool,
319  ({
320  vec_reset_length (str);
321  str = format (str, "%U", format_stream_session, s, verbose);
322  vlib_cli_output (vm, "%v", str);
323  }));
324  /* *INDENT-ON* */
325  }
326  }
327  else
328  vlib_cli_output (vm, "Thread %d: no active sessions", i);
329  vec_reset_length (str);
330  }
331  vec_free (str);
332 
333  return 0;
334 }
335 
336 /* *INDENT-OFF* */
337 VLIB_CLI_COMMAND (vlib_cli_show_session_command) =
338 {
339  .path = "show session",
340  .short_help = "show session [verbose [nnn]]",
341  .function = show_session_command_fn,
342 };
343 /* *INDENT-ON* */
344 
345 static int
347 {
348  app_worker_t *server_wrk = app_worker_get (s->app_wrk_index);
349  application_t *server = application_get (server_wrk->app_index);
350  server->cb_fns.session_disconnect_callback (s);
351  return 0;
352 }
353 
354 static clib_error_t *
356  vlib_cli_command_t * cmd)
357 {
359  u32 thread_index = 0, clear_all = 0;
361  u32 session_index = ~0;
362  stream_session_t *session;
363 
364  if (!smm->is_enabled)
365  {
366  return clib_error_return (0, "session layer is not enabled");
367  }
368 
370  {
371  if (unformat (input, "thread %d", &thread_index))
372  ;
373  else if (unformat (input, "session %d", &session_index))
374  ;
375  else if (unformat (input, "all"))
376  clear_all = 1;
377  else
378  return clib_error_return (0, "unknown input `%U'",
379  format_unformat_error, input);
380  }
381 
382  if (!clear_all && session_index == ~0)
383  return clib_error_return (0, "session <nn> required, but not set.");
384 
385  if (session_index != ~0)
386  {
387  session = session_get_if_valid (session_index, thread_index);
388  if (!session)
389  return clib_error_return (0, "no session %d on thread %d",
390  session_index, thread_index);
391  clear_session (session);
392  }
393 
394  if (clear_all)
395  {
396  /* *INDENT-OFF* */
397  vec_foreach (wrk, smm->wrk)
398  {
399  pool_foreach(session, wrk->sessions, ({
400  clear_session (session);
401  }));
402  };
403  /* *INDENT-ON* */
404  }
405 
406  return 0;
407 }
408 
409 /* *INDENT-OFF* */
410 VLIB_CLI_COMMAND (clear_session_command, static) =
411 {
412  .path = "clear session",
413  .short_help = "clear session thread <thread> session <index>",
414  .function = clear_session_command_fn,
415 };
416 /* *INDENT-ON* */
417 
418 static clib_error_t *
420  unformat_input_t * input,
421  vlib_cli_command_t * cmd)
422 {
423  stream_session_t *s = 0;
424  u8 is_rx = 0, *str = 0;
425 
427  {
428  if (unformat (input, "%U", unformat_stream_session, &s))
429  ;
430  else if (unformat (input, "rx"))
431  is_rx = 1;
432  else if (unformat (input, "tx"))
433  is_rx = 0;
434  else
435  return clib_error_return (0, "unknown input `%U'",
436  format_unformat_error, input);
437  }
438 
439  if (!SVM_FIFO_TRACE)
440  {
441  vlib_cli_output (vm, "fifo tracing not enabled");
442  return 0;
443  }
444 
445  if (!s)
446  {
447  vlib_cli_output (vm, "could not find session");
448  return 0;
449  }
450 
451  str = is_rx ?
452  svm_fifo_dump_trace (str, s->server_rx_fifo) :
453  svm_fifo_dump_trace (str, s->server_tx_fifo);
454 
455  vlib_cli_output (vm, "%v", str);
456  return 0;
457 }
458 
459 /* *INDENT-OFF* */
460 VLIB_CLI_COMMAND (show_session_fifo_trace_command, static) =
461 {
462  .path = "show session fifo trace",
463  .short_help = "show session fifo trace <session>",
465 };
466 /* *INDENT-ON* */
467 
468 static clib_error_t *
470  vlib_cli_command_t * cmd)
471 {
472  stream_session_t *s = 0;
473  u8 is_rx = 0, *str = 0;
474 
476  {
477  if (unformat (input, "%U", unformat_stream_session, &s))
478  ;
479  else if (unformat (input, "rx"))
480  is_rx = 1;
481  else
482  return clib_error_return (0, "unknown input `%U'",
483  format_unformat_error, input);
484  }
485 
486  if (!SVM_FIFO_TRACE)
487  {
488  vlib_cli_output (vm, "fifo tracing not enabled");
489  return 0;
490  }
491 
492  if (!s)
493  {
494  vlib_cli_output (vm, "could not find session");
495  return 0;
496  }
497 
498  str = is_rx ?
499  svm_fifo_replay (str, s->server_rx_fifo, 0, 1) :
500  svm_fifo_replay (str, s->server_tx_fifo, 0, 1);
501 
502  vlib_cli_output (vm, "%v", str);
503  return 0;
504 }
505 
506 /* *INDENT-OFF* */
507 VLIB_CLI_COMMAND (session_replay_fifo_trace_command, static) =
508 {
509  .path = "session replay fifo",
510  .short_help = "session replay fifo <session>",
511  .function = session_replay_fifo_command_fn,
512 };
513 /* *INDENT-ON* */
514 
515 static clib_error_t *
517  vlib_cli_command_t * cmd)
518 {
519  unformat_input_t _line_input, *line_input = &_line_input;
520  u8 is_en = 1;
521  clib_error_t *error;
522 
523  if (!unformat_user (input, unformat_line_input, line_input))
524  return clib_error_return (0, "expected enable | disable");
525 
526  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
527  {
528  if (unformat (line_input, "enable"))
529  is_en = 1;
530  else if (unformat (line_input, "disable"))
531  is_en = 0;
532  else
533  {
534  error = clib_error_return (0, "unknown input `%U'",
535  format_unformat_error, line_input);
536  unformat_free (line_input);
537  return error;
538  }
539  }
540 
541  unformat_free (line_input);
542  return vnet_session_enable_disable (vm, is_en);
543 }
544 
545 /* *INDENT-OFF* */
546 VLIB_CLI_COMMAND (session_enable_disable_command, static) =
547 {
548  .path = "session",
549  .short_help = "session [enable|disable]",
550  .function = session_enable_disable_fn,
551 };
552 /* *INDENT-ON* */
553 
554 /*
555  * fd.io coding-style-patch-verification: ON
556  *
557  * Local Variables:
558  * eval: (c-set-style "gnu")
559  * End:
560  */
app_worker_t * app_worker_get(u32 wrk_index)
Definition: application.c:517
u8 * format_transport_connection(u8 *s, va_list *args)
Definition: transport.c:98
u8 * format_session_fifos(u8 *s, va_list *args)
Definition: session_cli.c:19
struct _transport_connection transport_connection_t
format_function_t format_svm_fifo
Definition: svm_fifo.h:201
elog_time_stamp_t init_time
Timestamps.
Definition: elog.h:172
session_manager_main_t session_manager_main
Definition: session.c:27
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
int i
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:983
static clib_error_t * clear_session_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: session_cli.c:355
transport_connection_t * session_get_transport(stream_session_t *s)
Definition: session.c:1358
static void session_pool_remove_peeker(u32 thread_index)
Definition: session.h:483
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
u8 is_enabled
Session manager is enabled.
Definition: session.h:261
clib_time_t clib_time
Definition: main.h:65
unsigned char u8
Definition: types.h:56
enum fib_protocol_t_ fib_protocol_t
Protocol Type.
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
double f64
Definition: types.h:142
transport_connection_t * session_lookup_connection6(u32 fib_index, ip6_address_t *lcl, ip6_address_t *rmt, u16 lcl_port, u16 rmt_port, u8 proto)
Lookup connection with ip6 and transport layer information.
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:490
unformat_function_t unformat_ip4_address
Definition: format.h:70
static u32 svm_fifo_max_dequeue(svm_fifo_t *f)
Definition: svm_fifo.h:124
#define clib_error_return(e, args...)
Definition: error.h:99
static clib_error_t * show_session_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: session_cli.c:219
unsigned int u32
Definition: types.h:88
u32 fib_table_find(fib_protocol_t proto, u32 table_id)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:1064
struct _stream_session_t stream_session_t
u8 * format_stream_session(u8 *s, va_list *args)
Format stream session as per the following format.
Definition: session_cli.c:57
stream_session_t * sessions
Worker session pool.
Definition: session.h:184
transport_connection_t * session_lookup_connection4(u32 fib_index, ip4_address_t *lcl, ip4_address_t *rmt, u16 lcl_port, u16 rmt_port, u8 proto)
Lookup connection with ip4 and transport layer information.
unformat_function_t unformat_line_input
Definition: format.h:282
static transport_proto_t session_get_transport_proto(stream_session_t *s)
Definition: session.h:427
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
stream_session_t * session_lookup_safe6(u32 fib_index, ip6_address_t *lcl, ip6_address_t *rmt, u16 lcl_port, u16 rmt_port, u8 proto)
Lookup session with ip6 and transport layer information.
uword unformat_transport_connection(unformat_input_t *input, va_list *args)
Definition: session_cli.c:184
static u32 transport_elog_track_index(transport_connection_t *tc)
f64 seconds_per_clock
Definition: time.h:57
static stream_session_t * session_get_if_valid(u64 si, u32 thread_index)
Definition: session.h:349
u8 * svm_fifo_replay(u8 *s, svm_fifo_t *f, u8 no_read, u8 verbose)
Definition: svm_fifo.c:92
clib_error_t * vnet_session_enable_disable(vlib_main_t *vm, u8 is_en)
Definition: session.c:1529
uword unformat_stream_session_id(unformat_input_t *input, va_list *args)
Definition: session_cli.c:100
static int clear_session(stream_session_t *s)
Definition: session_cli.c:346
unformat_function_t unformat_ip6_address
Definition: format.h:91
#define UNFORMAT_END_OF_INPUT
Definition: format.h:144
static session_type_t session_type_from_proto_and_ip(transport_proto_t proto, u8 is_ip4)
Definition: session.h:440
vlib_main_t * vm
Definition: buffer.c:301
uword unformat_stream_session(unformat_input_t *input, va_list *args)
Definition: session_cli.c:153
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
#define clib_warning(format, args...)
Definition: error.h:59
stream_session_t * session_lookup_safe4(u32 fib_index, ip4_address_t *lcl, ip4_address_t *rmt, u16 lcl_port, u16 rmt_port, u8 proto)
Lookup session with ip4 and transport layer information.
elog_main_t elog_main
Definition: main.h:157
application_t * application_get(u32 app_index)
Definition: application.c:213
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:155
#define SVM_FIFO_TRACE
Definition: svm_fifo.h:39
uword unformat_transport_proto(unformat_input_t *input, va_list *args)
Definition: transport.c:155
u64 cpu
CPU cycle counter.
Definition: elog.h:126
session_cb_vft_t cb_fns
Callbacks: shoulder-taps for the server/client.
Definition: application.h:130
u8 * format_transport_half_open_connection(u8 *s, va_list *args)
Definition: transport.c:140
u8 * svm_fifo_dump_trace(u8 *s, svm_fifo_t *f)
Definition: svm_fifo.c:68
session_manager_worker_t * wrk
Worker contexts.
Definition: session.h:240
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u8 * format_elog_track(u8 *s, va_list *args)
Definition: elog.c:408
u64 uword
Definition: types.h:112
static void unformat_free(unformat_input_t *i)
Definition: format.h:162
u8 * format_transport_listen_connection(u8 *s, va_list *args)
Definition: transport.c:125
static clib_error_t * session_replay_fifo_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: session_cli.c:469
static clib_error_t * show_session_fifo_trace_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: session_cli.c:419
u32 app_index
Index of owning app.
Definition: application.h:71
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
u64 init_cpu_time
Definition: time.h:62
#define vec_foreach(var, vec)
Vector iterator.
u8 session_node_lookup_fifo_event(svm_fifo_t *f, session_event_t *e)
static clib_error_t * session_enable_disable_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: session_cli.c:516
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:762
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:170
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128