2 *------------------------------------------------------------------
3 * stat_client.c - Library for access to VPP statistics segment
5 * Copyright (c) 2018 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:
10 * http://www.apache.org/licenses/LICENSE-2.0
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 *------------------------------------------------------------------
22 #include <sys/types.h>
23 #include <sys/socket.h>
29 #include <vppinfra/vec.h>
30 #include <vppinfra/lock.h>
31 #include <stdatomic.h>
32 #include <vpp/stats/stat_segment.h>
33 #include <vpp-api/client/stat_client.h>
35 stat_client_main_t stat_client_main;
38 stat_client_get (void)
40 stat_client_main_t *sm;
41 sm = (stat_client_main_t *) malloc (sizeof (stat_client_main_t));
42 clib_memset (sm, 0, sizeof (stat_client_main_t));
47 stat_client_free (stat_client_main_t * sm)
55 struct msghdr msg = { 0 };
59 struct iovec io = {.iov_base = iobuf,.iov_len = sizeof (iobuf) };
62 char buf[CMSG_SPACE (sizeof (fd))];
67 msg.msg_control = u.buf;
68 msg.msg_controllen = sizeof (u.buf);
71 if ((size = recvmsg (sock, &msg, 0)) < 0)
73 perror ("recvmsg failed");
76 cmsg = CMSG_FIRSTHDR (&msg);
77 if (cmsg && cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS)
79 memmove (&fd, CMSG_DATA (cmsg), sizeof (fd));
84 static stat_segment_directory_entry_t *
85 get_stat_vector_r (stat_client_main_t * sm)
87 ASSERT (sm->shared_header);
88 return stat_segment_pointer (sm->shared_header,
89 sm->shared_header->directory_offset);
93 stat_segment_connect_r (const char *socket_name, stat_client_main_t * sm)
98 clib_memset (sm, 0, sizeof (*sm));
99 if ((sock = socket (AF_UNIX, SOCK_SEQPACKET, 0)) < 0)
101 perror ("Stat client couldn't open socket");
105 struct sockaddr_un un = { 0 };
106 un.sun_family = AF_UNIX;
107 strncpy ((char *) un.sun_path, socket_name, sizeof (un.sun_path) - 1);
108 if (connect (sock, (struct sockaddr *) &un, sizeof (struct sockaddr_un)) <
115 if ((mfd = recv_fd (sock)) < 0)
118 fprintf (stderr, "Receiving file descriptor failed\n");
123 /* mmap shared memory segment. */
125 struct stat st = { 0 };
127 if (fstat (mfd, &st) == -1)
130 perror ("mmap fstat failed");
134 mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, mfd, 0)) == MAP_FAILED)
137 perror ("mmap map failed");
142 sm->memory_size = st.st_size;
143 sm->shared_header = memaddr;
144 sm->directory_vector =
145 stat_segment_pointer (memaddr, sm->shared_header->directory_offset);
151 stat_segment_connect (const char *socket_name)
153 stat_client_main_t *sm = &stat_client_main;
154 return stat_segment_connect_r (socket_name, sm);
158 stat_segment_disconnect_r (stat_client_main_t * sm)
160 munmap (sm->shared_header, sm->memory_size);
165 stat_segment_disconnect (void)
167 stat_client_main_t *sm = &stat_client_main;
168 return stat_segment_disconnect_r (sm);
172 stat_segment_heartbeat_r (stat_client_main_t * sm)
174 stat_segment_access_t sa;
175 stat_segment_directory_entry_t *ep;
177 /* Has directory been update? */
178 if (sm->shared_header->epoch != sm->current_epoch)
180 stat_segment_access_start (&sa, sm);
181 ep = vec_elt_at_index (sm->directory_vector, STAT_COUNTER_HEARTBEAT);
182 if (!stat_segment_access_end (&sa, sm))
188 stat_segment_heartbeat (void)
190 stat_client_main_t *sm = &stat_client_main;
191 return stat_segment_heartbeat_r (sm);
194 static stat_segment_data_t
195 copy_data (stat_segment_directory_entry_t * ep, stat_client_main_t * sm)
197 stat_segment_data_t result = { 0 };
199 vlib_counter_t **combined_c; /* Combined counter */
200 counter_t **simple_c; /* Simple counter */
201 uint64_t *offset_vector;
203 assert (sm->shared_header);
205 result.type = ep->type;
206 result.name = strdup (ep->name);
209 case STAT_DIR_TYPE_SCALAR_INDEX:
210 result.scalar_value = ep->value;
213 case STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE:
216 simple_c = stat_segment_pointer (sm->shared_header, ep->offset);
217 result.simple_counter_vec = vec_dup (simple_c);
219 stat_segment_pointer (sm->shared_header, ep->offset_vector);
220 for (i = 0; i < vec_len (simple_c); i++)
223 stat_segment_pointer (sm->shared_header, offset_vector[i]);
224 result.simple_counter_vec[i] = vec_dup (cb);
228 case STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED:
231 combined_c = stat_segment_pointer (sm->shared_header, ep->offset);
232 result.combined_counter_vec = vec_dup (combined_c);
234 stat_segment_pointer (sm->shared_header, ep->offset_vector);
235 for (i = 0; i < vec_len (combined_c); i++)
238 stat_segment_pointer (sm->shared_header, offset_vector[i]);
239 result.combined_counter_vec[i] = vec_dup (cb);
243 case STAT_DIR_TYPE_ERROR_INDEX:
244 /* Gather errors from all threads into a vector */
245 offset_vector = stat_segment_pointer (sm->shared_header,
246 sm->shared_header->error_offset);
247 vec_validate (result.error_vector, vec_len (offset_vector) - 1);
248 for (i = 0; i < vec_len (offset_vector); i++)
251 stat_segment_pointer (sm->shared_header, offset_vector[i]);
252 result.error_vector[i] = cb[ep->index];
256 case STAT_DIR_TYPE_NAME_VECTOR:
259 uint8_t **name_vector =
260 stat_segment_pointer (sm->shared_header, ep->offset);
261 result.name_vector = vec_dup (name_vector);
263 stat_segment_pointer (sm->shared_header, ep->offset_vector);
264 for (i = 0; i < vec_len (name_vector); i++)
266 if (offset_vector[i])
269 stat_segment_pointer (sm->shared_header, offset_vector[i]);
270 result.name_vector[i] = vec_dup (name);
273 result.name_vector[i] = 0;
277 case STAT_DIR_TYPE_EMPTY:
281 fprintf (stderr, "Unknown type: %d\n", ep->type);
287 stat_segment_data_free (stat_segment_data_t * res)
290 for (i = 0; i < vec_len (res); i++)
294 case STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE:
295 for (j = 0; j < vec_len (res[i].simple_counter_vec); j++)
296 vec_free (res[i].simple_counter_vec[j]);
297 vec_free (res[i].simple_counter_vec);
299 case STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED:
300 for (j = 0; j < vec_len (res[i].combined_counter_vec); j++)
301 vec_free (res[i].combined_counter_vec[j]);
302 vec_free (res[i].combined_counter_vec);
304 case STAT_DIR_TYPE_NAME_VECTOR:
305 for (j = 0; j < vec_len (res[i].name_vector); j++)
306 vec_free (res[i].name_vector[j]);
307 vec_free (res[i].name_vector);
309 case STAT_DIR_TYPE_ERROR_INDEX:
310 vec_free (res[i].error_vector);
321 stat_segment_ls_r (uint8_t ** patterns, stat_client_main_t * sm)
323 stat_segment_access_t sa;
326 regex_t regex[vec_len (patterns)];
329 for (i = 0; i < vec_len (patterns); i++)
331 int rv = regcomp (®ex[i], (const char *) patterns[i], 0);
334 fprintf (stderr, "Could not compile regex %s\n", patterns[i]);
339 stat_segment_access_start (&sa, sm);
341 stat_segment_directory_entry_t *counter_vec = get_stat_vector_r (sm);
342 for (j = 0; j < vec_len (counter_vec); j++)
344 for (i = 0; i < vec_len (patterns); i++)
346 int rv = regexec (®ex[i], counter_vec[j].name, 0, NULL, 0);
353 if (vec_len (patterns) == 0)
357 for (i = 0; i < vec_len (patterns); i++)
360 if (!stat_segment_access_end (&sa, sm))
362 /* Failed, clean up */
368 /* Update last version */
369 sm->current_epoch = sa.epoch;
374 stat_segment_ls (uint8_t ** patterns)
376 stat_client_main_t *sm = &stat_client_main;
377 return stat_segment_ls_r ((uint8_t **) patterns, sm);
380 stat_segment_data_t *
381 stat_segment_dump_r (uint32_t * stats, stat_client_main_t * sm)
384 stat_segment_directory_entry_t *ep;
385 stat_segment_data_t *res = 0;
386 stat_segment_access_t sa;
388 /* Has directory been update? */
389 if (sm->shared_header->epoch != sm->current_epoch)
392 stat_segment_access_start (&sa, sm);
393 for (i = 0; i < vec_len (stats); i++)
395 /* Collect counter */
396 ep = vec_elt_at_index (sm->directory_vector, stats[i]);
397 vec_add1 (res, copy_data (ep, sm));
400 if (stat_segment_access_end (&sa, sm))
403 fprintf (stderr, "Epoch changed while reading, invalid results\n");
404 // TODO increase counter
408 stat_segment_data_t *
409 stat_segment_dump (uint32_t * stats)
411 stat_client_main_t *sm = &stat_client_main;
412 return stat_segment_dump_r (stats, sm);
415 /* Wrapper for accessing vectors from other languages */
417 stat_segment_vec_len (void *vec)
419 return vec_len (vec);
423 stat_segment_vec_free (void *vec)
428 /* Create a vector from a string (or add to existing) */
430 stat_segment_string_vector (uint8_t ** string_vector, const char *string)
433 size_t len = strlen (string);
435 vec_validate_init_c_string (name, string, len);
436 vec_add1 (string_vector, name);
437 return string_vector;
440 stat_segment_data_t *
441 stat_segment_dump_entry_r (uint32_t index, stat_client_main_t * sm)
443 stat_segment_directory_entry_t *ep;
444 stat_segment_data_t *res = 0;
445 stat_segment_access_t sa;
447 stat_segment_access_start (&sa, sm);
449 /* Collect counter */
450 ep = vec_elt_at_index (sm->directory_vector, index);
451 vec_add1 (res, copy_data (ep, sm));
453 if (stat_segment_access_end (&sa, sm))
458 stat_segment_data_t *
459 stat_segment_dump_entry (uint32_t index)
461 stat_client_main_t *sm = &stat_client_main;
462 return stat_segment_dump_entry_r (index, sm);
466 stat_segment_index_to_name_r (uint32_t index, stat_client_main_t * sm)
468 stat_segment_directory_entry_t *ep;
469 stat_segment_access_t sa;
470 stat_segment_directory_entry_t *vec;
472 /* Has directory been update? */
473 if (sm->shared_header->epoch != sm->current_epoch)
475 stat_segment_access_start (&sa, sm);
476 vec = get_stat_vector_r (sm);
477 ep = vec_elt_at_index (vec, index);
478 if (!stat_segment_access_end (&sa, sm))
480 return strdup (ep->name);
484 stat_segment_index_to_name (uint32_t index)
486 stat_client_main_t *sm = &stat_client_main;
487 return stat_segment_index_to_name_r (index, sm);
491 stat_segment_version_r (stat_client_main_t * sm)
493 ASSERT (sm->shared_header);
494 return sm->shared_header->version;
498 stat_segment_version (void)
500 stat_client_main_t *sm = &stat_client_main;
501 return stat_segment_version_r (sm);
505 * fd.io coding-style-patch-verification: ON
508 * eval: (c-set-style "gnu")