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 "stat_client.h"
32 #include <stdatomic.h>
33 #include <vpp/stats/stat_segment.h>
35 struct stat_client_main_t
37 uint64_t current_epoch;
38 stat_segment_shared_header_t *shared_header;
39 stat_segment_directory_entry_t *directory_vector;
43 stat_client_main_t stat_client_main;
46 stat_client_get (void)
48 stat_client_main_t *sm;
49 sm = (stat_client_main_t *) malloc (sizeof (stat_client_main_t));
50 clib_memset (sm, 0, sizeof (stat_client_main_t));
55 stat_client_free (stat_client_main_t * sm)
63 struct msghdr msg = { 0 };
67 struct iovec io = {.iov_base = iobuf,.iov_len = sizeof (iobuf) };
70 char buf[CMSG_SPACE (sizeof (fd))];
75 msg.msg_control = u.buf;
76 msg.msg_controllen = sizeof (u.buf);
79 if ((size = recvmsg (sock, &msg, 0)) < 0)
81 perror ("recvmsg failed");
84 cmsg = CMSG_FIRSTHDR (&msg);
85 if (cmsg && cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS)
87 memmove (&fd, CMSG_DATA (cmsg), sizeof (fd));
92 static stat_segment_directory_entry_t *
93 get_stat_vector_r (stat_client_main_t * sm)
95 ASSERT (sm->shared_header);
96 return stat_segment_pointer (sm->shared_header,
97 sm->shared_header->directory_offset);
101 stat_segment_connect_r (const char *socket_name, stat_client_main_t * sm)
106 clib_memset (sm, 0, sizeof (*sm));
107 if ((sock = socket (AF_UNIX, SOCK_SEQPACKET, 0)) < 0)
109 perror ("Stat client couldn't open socket");
113 struct sockaddr_un un = { 0 };
114 un.sun_family = AF_UNIX;
115 strncpy ((char *) un.sun_path, socket_name, sizeof (un.sun_path) - 1);
116 if (connect (sock, (struct sockaddr *) &un, sizeof (struct sockaddr_un)) <
123 if ((mfd = recv_fd (sock)) < 0)
126 fprintf (stderr, "Receiving file descriptor failed\n");
131 /* mmap shared memory segment. */
133 struct stat st = { 0 };
135 if (fstat (mfd, &st) == -1)
138 perror ("mmap fstat failed");
142 mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, mfd, 0)) == MAP_FAILED)
145 perror ("mmap map failed");
150 sm->memory_size = st.st_size;
151 sm->shared_header = memaddr;
152 sm->directory_vector =
153 stat_segment_pointer (memaddr, sm->shared_header->directory_offset);
159 stat_segment_connect (const char *socket_name)
161 stat_client_main_t *sm = &stat_client_main;
162 return stat_segment_connect_r (socket_name, sm);
166 stat_segment_disconnect_r (stat_client_main_t * sm)
168 munmap (sm->shared_header, sm->memory_size);
175 } stat_segment_access_t;
178 stat_segment_access_start (stat_segment_access_t * sa,
179 stat_client_main_t * sm)
181 stat_segment_shared_header_t *shared_header = sm->shared_header;
182 sa->epoch = shared_header->epoch;
183 while (shared_header->in_progress != 0)
185 sm->directory_vector = stat_segment_pointer (sm->shared_header,
187 shared_header->directory_offset);
191 stat_segment_access_end (stat_segment_access_t * sa, stat_client_main_t * sm)
193 stat_segment_shared_header_t *shared_header = sm->shared_header;
195 if (shared_header->epoch != sa->epoch || shared_header->in_progress)
201 stat_segment_disconnect (void)
203 stat_client_main_t *sm = &stat_client_main;
204 return stat_segment_disconnect_r (sm);
208 stat_segment_heartbeat_r (stat_client_main_t * sm)
210 stat_segment_access_t sa;
211 stat_segment_directory_entry_t *ep;
213 /* Has directory been update? */
214 if (sm->shared_header->epoch != sm->current_epoch)
216 stat_segment_access_start (&sa, sm);
217 ep = vec_elt_at_index (sm->directory_vector, STAT_COUNTER_HEARTBEAT);
218 if (!stat_segment_access_end (&sa, sm))
224 stat_segment_heartbeat (void)
226 stat_client_main_t *sm = &stat_client_main;
227 return stat_segment_heartbeat_r (sm);
230 static stat_segment_data_t
231 copy_data (stat_segment_directory_entry_t * ep, stat_client_main_t * sm)
233 stat_segment_data_t result = { 0 };
235 vlib_counter_t **combined_c; /* Combined counter */
236 counter_t **simple_c; /* Simple counter */
237 uint64_t *offset_vector;
239 assert (sm->shared_header);
241 result.type = ep->type;
242 result.name = strdup (ep->name);
245 case STAT_DIR_TYPE_SCALAR_INDEX:
246 result.scalar_value = ep->value;
249 case STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE:
252 simple_c = stat_segment_pointer (sm->shared_header, ep->offset);
253 result.simple_counter_vec = vec_dup (simple_c);
255 stat_segment_pointer (sm->shared_header, ep->offset_vector);
256 for (i = 0; i < vec_len (simple_c); i++)
259 stat_segment_pointer (sm->shared_header, offset_vector[i]);
260 result.simple_counter_vec[i] = vec_dup (cb);
264 case STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED:
267 combined_c = stat_segment_pointer (sm->shared_header, ep->offset);
268 result.combined_counter_vec = vec_dup (combined_c);
270 stat_segment_pointer (sm->shared_header, ep->offset_vector);
271 for (i = 0; i < vec_len (combined_c); i++)
274 stat_segment_pointer (sm->shared_header, offset_vector[i]);
275 result.combined_counter_vec[i] = vec_dup (cb);
279 case STAT_DIR_TYPE_ERROR_INDEX:
280 /* Gather errors from all threads into a vector */
281 offset_vector = stat_segment_pointer (sm->shared_header,
282 sm->shared_header->error_offset);
283 vec_validate (result.error_vector, vec_len (offset_vector) - 1);
284 for (i = 0; i < vec_len (offset_vector); i++)
287 stat_segment_pointer (sm->shared_header, offset_vector[i]);
288 result.error_vector[i] = cb[ep->index];
292 case STAT_DIR_TYPE_NAME_VECTOR:
295 uint8_t **name_vector =
296 stat_segment_pointer (sm->shared_header, ep->offset);
297 result.name_vector = vec_dup (name_vector);
299 stat_segment_pointer (sm->shared_header, ep->offset_vector);
300 for (i = 0; i < vec_len (name_vector); i++)
302 if (offset_vector[i])
305 stat_segment_pointer (sm->shared_header, offset_vector[i]);
306 result.name_vector[i] = vec_dup (name);
309 result.name_vector[i] = 0;
314 fprintf (stderr, "Unknown type: %d\n", ep->type);
320 stat_segment_data_free (stat_segment_data_t * res)
323 for (i = 0; i < vec_len (res); i++)
327 case STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE:
328 for (j = 0; j < vec_len (res[i].simple_counter_vec); j++)
329 vec_free (res[i].simple_counter_vec[j]);
330 vec_free (res[i].simple_counter_vec);
332 case STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED:
333 for (j = 0; j < vec_len (res[i].combined_counter_vec); j++)
334 vec_free (res[i].combined_counter_vec[j]);
335 vec_free (res[i].combined_counter_vec);
346 stat_segment_ls_r (uint8_t ** patterns, stat_client_main_t * sm)
348 stat_segment_access_t sa;
351 regex_t regex[vec_len (patterns)];
354 for (i = 0; i < vec_len (patterns); i++)
356 int rv = regcomp (®ex[i], (const char *) patterns[i], 0);
359 fprintf (stderr, "Could not compile regex %s\n", patterns[i]);
364 stat_segment_access_start (&sa, sm);
366 stat_segment_directory_entry_t *counter_vec = get_stat_vector_r (sm);
367 for (j = 0; j < vec_len (counter_vec); j++)
369 for (i = 0; i < vec_len (patterns); i++)
371 int rv = regexec (®ex[i], counter_vec[j].name, 0, NULL, 0);
378 if (vec_len (patterns) == 0)
382 for (i = 0; i < vec_len (patterns); i++)
385 if (!stat_segment_access_end (&sa, sm))
387 /* Failed, clean up */
393 /* Update last version */
394 sm->current_epoch = sa.epoch;
399 stat_segment_ls (uint8_t ** patterns)
401 stat_client_main_t *sm = &stat_client_main;
402 return stat_segment_ls_r ((uint8_t **) patterns, sm);
405 stat_segment_data_t *
406 stat_segment_dump_r (uint32_t * stats, stat_client_main_t * sm)
409 stat_segment_directory_entry_t *ep;
410 stat_segment_data_t *res = 0;
411 stat_segment_access_t sa;
413 /* Has directory been update? */
414 if (sm->shared_header->epoch != sm->current_epoch)
417 stat_segment_access_start (&sa, sm);
418 for (i = 0; i < vec_len (stats); i++)
420 /* Collect counter */
421 ep = vec_elt_at_index (sm->directory_vector, stats[i]);
422 vec_add1 (res, copy_data (ep, sm));
425 if (stat_segment_access_end (&sa, sm))
428 fprintf (stderr, "Epoch changed while reading, invalid results\n");
429 // TODO increase counter
433 stat_segment_data_t *
434 stat_segment_dump (uint32_t * stats)
436 stat_client_main_t *sm = &stat_client_main;
437 return stat_segment_dump_r (stats, sm);
440 /* Wrapper for accessing vectors from other languages */
442 stat_segment_vec_len (void *vec)
444 return vec_len (vec);
448 stat_segment_vec_free (void *vec)
453 /* Create a vector from a string (or add to existing) */
455 stat_segment_string_vector (uint8_t ** string_vector, const char *string)
458 size_t len = strlen (string);
460 vec_validate_init_c_string (name, string, len);
461 vec_add1 (string_vector, name);
462 return string_vector;
465 stat_segment_data_t *
466 stat_segment_dump_entry_r (uint32_t index, stat_client_main_t * sm)
468 stat_segment_directory_entry_t *ep;
469 stat_segment_data_t *res = 0;
470 stat_segment_access_t sa;
472 stat_segment_access_start (&sa, sm);
474 /* Collect counter */
475 ep = vec_elt_at_index (sm->directory_vector, index);
476 vec_add1 (res, copy_data (ep, sm));
478 if (stat_segment_access_end (&sa, sm))
483 stat_segment_data_t *
484 stat_segment_dump_entry (uint32_t index)
486 stat_client_main_t *sm = &stat_client_main;
487 return stat_segment_dump_entry_r (index, sm);
491 stat_segment_index_to_name_r (uint32_t index, stat_client_main_t * sm)
493 stat_segment_directory_entry_t *ep;
494 stat_segment_access_t sa;
495 stat_segment_directory_entry_t *vec;
497 /* Has directory been update? */
498 if (sm->shared_header->epoch != sm->current_epoch)
500 stat_segment_access_start (&sa, sm);
501 vec = get_stat_vector_r (sm);
502 ep = vec_elt_at_index (vec, index);
503 if (!stat_segment_access_end (&sa, sm))
505 return strdup (ep->name);
509 stat_segment_index_to_name (uint32_t index)
511 stat_client_main_t *sm = &stat_client_main;
512 return stat_segment_index_to_name_r (index, sm);
516 stat_segment_version_r (stat_client_main_t * sm)
518 ASSERT (sm->shared_header);
519 return sm->shared_header->version;
523 stat_segment_version (void)
525 stat_client_main_t *sm = &stat_client_main;
526 return stat_segment_version_r (sm);
530 * fd.io coding-style-patch-verification: ON
533 * eval: (c-set-style "gnu")