Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
ab5be9fa | 7 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
ab5be9fa | 9 | * SPDX-License-Identifier: LGPL-2.1-only |
82a3637f | 10 | * |
fac6795d DG |
11 | */ |
12 | ||
6c1c0768 | 13 | #define _LGPL_SOURCE |
44a5e5eb | 14 | #include <assert.h> |
fac6795d DG |
15 | #include <grp.h> |
16 | #include <stdio.h> | |
17 | #include <stdlib.h> | |
18 | #include <string.h> | |
19 | #include <unistd.h> | |
20 | ||
990570ed | 21 | #include <common/common.h> |
edf4b93e | 22 | #include <common/compat/errno.h> |
15e37663 | 23 | #include <common/compat/string.h> |
990570ed | 24 | #include <common/defaults.h> |
159b042f | 25 | #include <common/dynamic-buffer.h> |
fe489250 | 26 | #include <common/dynamic-array.h> |
9e620ea7 JG |
27 | #include <common/payload.h> |
28 | #include <common/payload-view.h> | |
db758600 | 29 | #include <common/sessiond-comm/sessiond-comm.h> |
159b042f | 30 | #include <common/tracker.h> |
fe489250 | 31 | #include <common/unix.h> |
a4b92340 | 32 | #include <common/uri.h> |
feb0f3e5 | 33 | #include <common/utils.h> |
a58c490f | 34 | #include <lttng/channel-internal.h> |
159b042f JG |
35 | #include <lttng/destruction-handle.h> |
36 | #include <lttng/endpoint.h> | |
de453daa | 37 | #include <lttng/event-internal.h> |
159b042f JG |
38 | #include <lttng/health-internal.h> |
39 | #include <lttng/lttng.h> | |
b178f53e | 40 | #include <lttng/session-descriptor-internal.h> |
159b042f JG |
41 | #include <lttng/session-internal.h> |
42 | #include <lttng/trigger/trigger-internal.h> | |
43 | #include <lttng/userspace-probe-internal.h> | |
fe489250 | 44 | #include <lttng/lttng-error.h> |
fac6795d | 45 | |
e4d2f27a JR |
46 | #include <common/filter/filter-ast.h> |
47 | #include <common/filter/filter-parser.h> | |
48 | #include <common/filter/filter-bytecode.h> | |
49 | #include <common/filter/memstream.h> | |
cac3069d | 50 | #include "lttng-ctl-helper.h" |
53a80697 | 51 | |
60160d2a JG |
52 | #define COPY_DOMAIN_PACKED(dst, src) \ |
53 | do { \ | |
54 | struct lttng_domain _tmp_domain; \ | |
55 | \ | |
56 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
57 | dst = _tmp_domain; \ | |
58 | } while (0) | |
53a80697 | 59 | |
fac6795d | 60 | /* Socket to session daemon for communication */ |
3e3665b8 | 61 | static int sessiond_socket = -1; |
fac6795d DG |
62 | static char sessiond_sock_path[PATH_MAX]; |
63 | ||
fac6795d DG |
64 | /* Variables */ |
65 | static char *tracing_group; | |
66 | static int connected; | |
67 | ||
97e19046 DG |
68 | /* Global */ |
69 | ||
70 | /* | |
71 | * Those two variables are used by error.h to silent or control the verbosity of | |
72 | * error message. They are global to the library so application linking with it | |
73 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
74 | */ |
75 | int lttng_opt_quiet; | |
76 | int lttng_opt_verbose; | |
c7e35b03 | 77 | int lttng_opt_mi; |
97e19046 | 78 | |
99497cd0 MD |
79 | /* |
80 | * Copy string from src to dst and enforce null terminated byte. | |
81 | */ | |
cac3069d DG |
82 | LTTNG_HIDDEN |
83 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 84 | { |
e7d6716d | 85 | if (src && dst) { |
99497cd0 MD |
86 | strncpy(dst, src, len); |
87 | /* Enforce the NULL terminated byte */ | |
88 | dst[len - 1] = '\0'; | |
cd80958d DG |
89 | } else if (dst) { |
90 | dst[0] = '\0'; | |
99497cd0 MD |
91 | } |
92 | } | |
93 | ||
fac6795d | 94 | /* |
cd80958d | 95 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 96 | * |
cd80958d DG |
97 | * If domain is unknown, default domain will be the kernel. |
98 | */ | |
cac3069d DG |
99 | LTTNG_HIDDEN |
100 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
101 | struct lttng_domain *src) | |
cd80958d DG |
102 | { |
103 | if (src && dst) { | |
104 | switch (src->type) { | |
00e2e675 DG |
105 | case LTTNG_DOMAIN_KERNEL: |
106 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 107 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 108 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 109 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
110 | memcpy(dst, src, sizeof(struct lttng_domain)); |
111 | break; | |
112 | default: | |
113 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 114 | break; |
cd80958d DG |
115 | } |
116 | } | |
117 | } | |
118 | ||
119 | /* | |
120 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 121 | * |
1c8d13c8 TD |
122 | * On success, returns the number of bytes sent (>=0) |
123 | * On error, returns -1 | |
fac6795d | 124 | */ |
cd80958d | 125 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
126 | { |
127 | int ret; | |
128 | ||
129 | if (!connected) { | |
2f70b271 | 130 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 131 | goto end; |
fac6795d DG |
132 | } |
133 | ||
a4b92340 DG |
134 | DBG("LSM cmd type : %d", lsm->cmd_type); |
135 | ||
be040666 | 136 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 137 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
138 | if (ret < 0) { |
139 | ret = -LTTNG_ERR_FATAL; | |
140 | } | |
e065084a DG |
141 | |
142 | end: | |
143 | return ret; | |
144 | } | |
145 | ||
53a80697 MD |
146 | /* |
147 | * Send var len data to the session daemon. | |
148 | * | |
149 | * On success, returns the number of bytes sent (>=0) | |
150 | * On error, returns -1 | |
151 | */ | |
c2d69327 | 152 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
153 | { |
154 | int ret; | |
155 | ||
156 | if (!connected) { | |
2f70b271 | 157 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
158 | goto end; |
159 | } | |
a4b92340 | 160 | |
53a80697 MD |
161 | if (!data || !len) { |
162 | ret = 0; | |
163 | goto end; | |
164 | } | |
165 | ||
166 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
167 | if (ret < 0) { |
168 | ret = -LTTNG_ERR_FATAL; | |
169 | } | |
53a80697 MD |
170 | |
171 | end: | |
172 | return ret; | |
173 | } | |
174 | ||
a04d53fc FD |
175 | /* |
176 | * Send file descriptors to the session daemon. | |
177 | * | |
178 | * On success, returns the number of bytes sent (>=0) | |
179 | * On error, returns -1 | |
180 | */ | |
181 | static int send_session_fds(const int *fds, size_t nb_fd) | |
182 | { | |
183 | int ret; | |
184 | ||
185 | if (!connected) { | |
186 | ret = -LTTNG_ERR_NO_SESSIOND; | |
187 | goto end; | |
188 | } | |
189 | ||
190 | if (!fds || !nb_fd) { | |
191 | ret = 0; | |
192 | goto end; | |
193 | } | |
194 | ||
195 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
196 | if (ret < 0) { | |
197 | ret = -LTTNG_ERR_FATAL; | |
198 | } | |
199 | ||
200 | end: | |
201 | return ret; | |
202 | } | |
203 | ||
e065084a | 204 | /* |
cd80958d | 205 | * Receive data from the sessiond socket. |
e065084a | 206 | * |
1c8d13c8 | 207 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 208 | * On error, returns a negative lttng_error_code. |
e065084a | 209 | */ |
ca95a216 | 210 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
211 | { |
212 | int ret; | |
213 | ||
bacc41cc FD |
214 | assert(len > 0); |
215 | ||
e065084a | 216 | if (!connected) { |
2f70b271 | 217 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 218 | goto end; |
fac6795d DG |
219 | } |
220 | ||
ca95a216 | 221 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
222 | if (ret < 0) { |
223 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
224 | } else if (ret == 0) { |
225 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 226 | } |
fac6795d | 227 | |
e065084a | 228 | end: |
fac6795d DG |
229 | return ret; |
230 | } | |
231 | ||
e368fb43 JG |
232 | /* |
233 | * Receive a payload from the session daemon by appending to an existing | |
234 | * payload. | |
235 | * On success, returns the number of bytes received (>=0) | |
236 | * On error, returns a negative lttng_error_code. | |
237 | */ | |
238 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
239 | { | |
240 | int ret; | |
241 | const size_t original_payload_size = payload->buffer.size; | |
242 | ||
243 | ret = lttng_dynamic_buffer_set_size( | |
244 | &payload->buffer, payload->buffer.size + len); | |
245 | if (ret) { | |
246 | ret = -LTTNG_ERR_NOMEM; | |
247 | goto end; | |
248 | } | |
249 | ||
250 | ret = recv_data_sessiond( | |
251 | payload->buffer.data + original_payload_size, len); | |
252 | end: | |
253 | return ret; | |
254 | } | |
255 | ||
fac6795d | 256 | /* |
9ae110e2 | 257 | * Check if we are in the specified group. |
65beb5ff | 258 | * |
9ae110e2 | 259 | * If yes return 1, else return -1. |
947308c4 | 260 | */ |
6c71277b MD |
261 | LTTNG_HIDDEN |
262 | int lttng_check_tracing_group(void) | |
947308c4 | 263 | { |
28ab59d0 | 264 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
265 | int grp_list_size, grp_id, i; |
266 | int ret = -1; | |
6c71277b | 267 | const char *grp_name = tracing_group; |
947308c4 DG |
268 | |
269 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 270 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 271 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
272 | goto end; |
273 | } | |
274 | ||
275 | /* Get number of supplementary group IDs */ | |
276 | grp_list_size = getgroups(0, NULL); | |
277 | if (grp_list_size < 0) { | |
6f04ed72 | 278 | PERROR("getgroups"); |
947308c4 DG |
279 | goto end; |
280 | } | |
281 | ||
282 | /* Alloc group list of the right size */ | |
3f451dc0 | 283 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 284 | if (!grp_list) { |
6f04ed72 | 285 | PERROR("malloc"); |
00795392 MD |
286 | goto end; |
287 | } | |
947308c4 | 288 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 289 | if (grp_id < 0) { |
6f04ed72 | 290 | PERROR("getgroups"); |
947308c4 DG |
291 | goto free_list; |
292 | } | |
293 | ||
294 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 295 | if (grp_list[i] == tracing_gid) { |
2269e89e | 296 | ret = 1; |
947308c4 DG |
297 | break; |
298 | } | |
299 | } | |
300 | ||
301 | free_list: | |
302 | free(grp_list); | |
303 | ||
304 | end: | |
305 | return ret; | |
306 | } | |
307 | ||
09b72f7a FD |
308 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
309 | { | |
310 | int ret; | |
311 | long num_cpu; | |
312 | size_t best_mem_info; | |
313 | size_t num_bytes_requested_total; | |
314 | ||
315 | /* | |
316 | * Get the number of CPU currently online to compute the amount of | |
317 | * memory needed to create a buffer for every CPU. | |
318 | */ | |
319 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
320 | if (num_cpu == -1) { | |
321 | goto error; | |
322 | } | |
323 | ||
324 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
325 | ||
326 | /* | |
327 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
328 | * reliable estimate we can get but it is only exposed by the kernel | |
329 | * since 3.14. (See Linux kernel commit: | |
330 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
331 | */ | |
332 | ret = utils_get_memory_available(&best_mem_info); | |
333 | if (ret >= 0) { | |
334 | goto success; | |
335 | } | |
336 | ||
337 | /* | |
338 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
339 | * is a sanity check for obvious user error. | |
340 | */ | |
341 | ret = utils_get_memory_total(&best_mem_info); | |
342 | if (ret >= 0) { | |
343 | goto success; | |
344 | } | |
345 | ||
346 | error: | |
347 | return -1; | |
348 | success: | |
349 | return best_mem_info >= num_bytes_requested_total; | |
350 | } | |
351 | ||
947308c4 | 352 | /* |
2269e89e DG |
353 | * Try connect to session daemon with sock_path. |
354 | * | |
355 | * Return 0 on success, else -1 | |
356 | */ | |
357 | static int try_connect_sessiond(const char *sock_path) | |
358 | { | |
359 | int ret; | |
360 | ||
361 | /* If socket exist, we check if the daemon listens for connect. */ | |
362 | ret = access(sock_path, F_OK); | |
363 | if (ret < 0) { | |
364 | /* Not alive */ | |
2f70b271 | 365 | goto error; |
2269e89e DG |
366 | } |
367 | ||
368 | ret = lttcomm_connect_unix_sock(sock_path); | |
369 | if (ret < 0) { | |
9ae110e2 | 370 | /* Not alive. */ |
2f70b271 | 371 | goto error; |
2269e89e DG |
372 | } |
373 | ||
374 | ret = lttcomm_close_unix_sock(ret); | |
375 | if (ret < 0) { | |
6f04ed72 | 376 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
377 | } |
378 | ||
379 | return 0; | |
2f70b271 DG |
380 | |
381 | error: | |
382 | return -1; | |
2269e89e DG |
383 | } |
384 | ||
385 | /* | |
2f70b271 DG |
386 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
387 | * variable. | |
388 | * | |
389 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
390 | * is somehow too long or ENOMEM). | |
947308c4 DG |
391 | */ |
392 | static int set_session_daemon_path(void) | |
393 | { | |
9ae110e2 | 394 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
395 | uid_t uid; |
396 | ||
397 | uid = getuid(); | |
947308c4 | 398 | |
2269e89e DG |
399 | if (uid != 0) { |
400 | /* Are we in the tracing group ? */ | |
6c71277b | 401 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
402 | } |
403 | ||
08a9c49f | 404 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
405 | lttng_ctl_copy_string(sessiond_sock_path, |
406 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 407 | } |
2269e89e | 408 | |
08a9c49f | 409 | if (uid != 0) { |
c617c0c6 MD |
410 | int ret; |
411 | ||
08a9c49f | 412 | if (in_tgroup) { |
9ae110e2 | 413 | /* Tracing group. */ |
08a9c49f TD |
414 | ret = try_connect_sessiond(sessiond_sock_path); |
415 | if (ret >= 0) { | |
416 | goto end; | |
2269e89e | 417 | } |
08a9c49f | 418 | /* Global session daemon not available... */ |
2269e89e | 419 | } |
08a9c49f TD |
420 | /* ...or not in tracing group (and not root), default */ |
421 | ||
422 | /* | |
9ae110e2 JG |
423 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
424 | * is too small; | |
425 | * With GNU C >= 2.1, snprintf returns the required size | |
426 | * (excluding closing null) | |
08a9c49f TD |
427 | */ |
428 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 429 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 430 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 431 | goto error; |
947308c4 | 432 | } |
947308c4 | 433 | } |
08a9c49f | 434 | end: |
947308c4 | 435 | return 0; |
2f70b271 DG |
436 | |
437 | error: | |
438 | return -1; | |
947308c4 DG |
439 | } |
440 | ||
65beb5ff | 441 | /* |
9ae110e2 | 442 | * Connect to the LTTng session daemon. |
65beb5ff | 443 | * |
3e3665b8 | 444 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 445 | */ |
3e3665b8 | 446 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
447 | { |
448 | int ret; | |
449 | ||
450 | ret = set_session_daemon_path(); | |
451 | if (ret < 0) { | |
2f70b271 | 452 | goto error; |
65beb5ff DG |
453 | } |
454 | ||
9ae110e2 | 455 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
456 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
457 | if (ret < 0) { | |
2f70b271 | 458 | goto error; |
65beb5ff DG |
459 | } |
460 | ||
3e3665b8 | 461 | return ret; |
2f70b271 DG |
462 | |
463 | error: | |
464 | return -1; | |
65beb5ff DG |
465 | } |
466 | ||
3e3665b8 JG |
467 | static void reset_global_sessiond_connection_state(void) |
468 | { | |
469 | sessiond_socket = -1; | |
470 | connected = 0; | |
471 | } | |
472 | ||
65beb5ff | 473 | /* |
1c8d13c8 | 474 | * Clean disconnect from the session daemon. |
9ae110e2 | 475 | * |
1c8d13c8 | 476 | * On success, return 0. On error, return -1. |
65beb5ff DG |
477 | */ |
478 | static int disconnect_sessiond(void) | |
479 | { | |
480 | int ret = 0; | |
481 | ||
482 | if (connected) { | |
483 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 484 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
485 | } |
486 | ||
487 | return ret; | |
488 | } | |
489 | ||
795a978d PP |
490 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
491 | size_t *user_len) | |
492 | { | |
493 | int ret = 0; | |
494 | void *buf = NULL; | |
495 | ||
496 | if (len) { | |
497 | if (!user_len) { | |
498 | ret = -LTTNG_ERR_INVALID; | |
499 | goto end; | |
500 | } | |
501 | ||
502 | buf = zmalloc(len); | |
503 | if (!buf) { | |
504 | ret = -ENOMEM; | |
505 | goto end; | |
506 | } | |
507 | ||
508 | ret = recv_data_sessiond(buf, len); | |
509 | if (ret < 0) { | |
510 | goto end; | |
511 | } | |
512 | ||
513 | if (!user_buf) { | |
514 | ret = -LTTNG_ERR_INVALID; | |
515 | goto end; | |
516 | } | |
517 | ||
518 | /* Move ownership of command header buffer to user. */ | |
519 | *user_buf = buf; | |
520 | buf = NULL; | |
521 | *user_len = len; | |
522 | } else { | |
523 | /* No command header. */ | |
524 | if (user_len) { | |
525 | *user_len = 0; | |
526 | } | |
527 | ||
528 | if (user_buf) { | |
529 | *user_buf = NULL; | |
530 | } | |
531 | } | |
532 | ||
533 | end: | |
534 | free(buf); | |
535 | return ret; | |
536 | } | |
537 | ||
35a6fdb7 | 538 | /* |
cd80958d | 539 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
540 | * Takes extra var. len. data and file descriptors as input to send to the |
541 | * session daemon. | |
65beb5ff | 542 | * |
af87c45a | 543 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 544 | */ |
cac3069d | 545 | LTTNG_HIDDEN |
a04d53fc FD |
546 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
547 | const int *fds, size_t nb_fd, const void *vardata, | |
548 | size_t vardata_len, void **user_payload_buf, | |
549 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
550 | { |
551 | int ret; | |
795a978d | 552 | size_t payload_len; |
cd80958d | 553 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
554 | |
555 | ret = connect_sessiond(); | |
556 | if (ret < 0) { | |
2f70b271 | 557 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 558 | goto end; |
3e3665b8 JG |
559 | } else { |
560 | sessiond_socket = ret; | |
561 | connected = 1; | |
65beb5ff DG |
562 | } |
563 | ||
cd80958d | 564 | ret = send_session_msg(lsm); |
65beb5ff | 565 | if (ret < 0) { |
2f70b271 | 566 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
567 | goto end; |
568 | } | |
53a80697 | 569 | /* Send var len data */ |
795a978d | 570 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 571 | if (ret < 0) { |
2f70b271 | 572 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
573 | goto end; |
574 | } | |
65beb5ff | 575 | |
a04d53fc FD |
576 | /* Send fds */ |
577 | ret = send_session_fds(fds, nb_fd); | |
578 | if (ret < 0) { | |
579 | /* Ret value is a valid lttng error code. */ | |
580 | goto end; | |
581 | } | |
582 | ||
65beb5ff DG |
583 | /* Get header from data transmission */ |
584 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
585 | if (ret < 0) { | |
2f70b271 | 586 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
587 | goto end; |
588 | } | |
589 | ||
590 | /* Check error code if OK */ | |
f73fabfd | 591 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
592 | ret = -llm.ret_code; |
593 | goto end; | |
594 | } | |
595 | ||
795a978d PP |
596 | /* Get command header from data transmission */ |
597 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
598 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 599 | if (ret < 0) { |
65beb5ff DG |
600 | goto end; |
601 | } | |
602 | ||
795a978d PP |
603 | /* Get payload from data transmission */ |
604 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
605 | &payload_len); | |
606 | if (ret < 0) { | |
83009e5e DG |
607 | goto end; |
608 | } | |
609 | ||
795a978d | 610 | ret = llm.data_size; |
65beb5ff DG |
611 | |
612 | end: | |
613 | disconnect_sessiond(); | |
614 | return ret; | |
615 | } | |
616 | ||
e368fb43 JG |
617 | LTTNG_HIDDEN |
618 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, | |
619 | struct lttng_payload *reply) | |
620 | { | |
621 | int ret; | |
622 | struct lttcomm_lttng_msg llm; | |
fe489250 | 623 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 JG |
624 | |
625 | assert(reply->buffer.size == 0); | |
fe489250 | 626 | assert(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); |
e368fb43 JG |
627 | |
628 | ret = connect_sessiond(); | |
629 | if (ret < 0) { | |
630 | ret = -LTTNG_ERR_NO_SESSIOND; | |
631 | goto end; | |
632 | } else { | |
633 | sessiond_socket = ret; | |
634 | connected = 1; | |
635 | } | |
636 | ||
637 | /* Send command to session daemon */ | |
638 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data, | |
639 | message->buffer.size); | |
640 | if (ret < 0) { | |
641 | ret = -LTTNG_ERR_FATAL; | |
642 | goto end; | |
643 | } | |
644 | ||
fe489250 JG |
645 | if (fd_count > 0) { |
646 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, | |
647 | message); | |
648 | if (ret < 0) { | |
649 | ret = -LTTNG_ERR_FATAL; | |
650 | goto end; | |
651 | } | |
e368fb43 JG |
652 | } |
653 | ||
654 | /* Get header from data transmission */ | |
655 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
656 | if (ret < 0) { | |
657 | /* Ret value is a valid lttng error code. */ | |
658 | goto end; | |
659 | } | |
660 | ||
661 | llm = *((typeof(llm) *) reply->buffer.data); | |
662 | ||
663 | /* Check error code if OK */ | |
664 | if (llm.ret_code != LTTNG_OK) { | |
665 | ret = -llm.ret_code; | |
666 | goto end; | |
667 | } | |
668 | ||
669 | if (llm.cmd_header_size > 0) { | |
670 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
671 | if (ret < 0) { | |
672 | goto end; | |
673 | } | |
674 | } | |
675 | ||
676 | /* Get command header from data transmission */ | |
677 | if (llm.data_size > 0) { | |
678 | ret = recv_payload_sessiond(reply, llm.data_size); | |
679 | if (ret < 0) { | |
680 | goto end; | |
681 | } | |
682 | } | |
683 | ||
684 | if (llm.fd_count > 0) { | |
fe489250 JG |
685 | ret = lttcomm_recv_payload_fds_unix_sock( |
686 | sessiond_socket, llm.fd_count, reply); | |
687 | if (ret < 0) { | |
e368fb43 JG |
688 | goto end; |
689 | } | |
690 | } | |
691 | ||
692 | /* Don't return the llm header to the caller. */ | |
693 | memmove(reply->buffer.data, reply->buffer.data + sizeof(llm), | |
694 | reply->buffer.size - sizeof(llm)); | |
695 | ret = lttng_dynamic_buffer_set_size( | |
696 | &reply->buffer, reply->buffer.size - sizeof(llm)); | |
697 | if (ret) { | |
698 | /* Can't happen as size is reduced. */ | |
699 | abort(); | |
700 | } | |
701 | ||
702 | ret = reply->buffer.size; | |
703 | ||
704 | end: | |
705 | disconnect_sessiond(); | |
706 | return ret; | |
707 | } | |
708 | ||
9f19cc17 | 709 | /* |
cd80958d | 710 | * Create lttng handle and return pointer. |
9ae110e2 | 711 | * |
1c8d13c8 | 712 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 713 | */ |
cd80958d DG |
714 | struct lttng_handle *lttng_create_handle(const char *session_name, |
715 | struct lttng_domain *domain) | |
9f19cc17 | 716 | { |
2f70b271 DG |
717 | struct lttng_handle *handle = NULL; |
718 | ||
3f451dc0 | 719 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 720 | if (handle == NULL) { |
2f70b271 | 721 | PERROR("malloc handle"); |
cd80958d DG |
722 | goto end; |
723 | } | |
724 | ||
725 | /* Copy session name */ | |
cac3069d | 726 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
727 | sizeof(handle->session_name)); |
728 | ||
95681498 JG |
729 | /* Copy lttng domain or leave initialized to 0. */ |
730 | if (domain) { | |
731 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
732 | } | |
cd80958d DG |
733 | |
734 | end: | |
735 | return handle; | |
736 | } | |
737 | ||
738 | /* | |
739 | * Destroy handle by free(3) the pointer. | |
740 | */ | |
741 | void lttng_destroy_handle(struct lttng_handle *handle) | |
742 | { | |
0e428499 | 743 | free(handle); |
eb354453 DG |
744 | } |
745 | ||
d9800920 DG |
746 | /* |
747 | * Register an outside consumer. | |
9ae110e2 | 748 | * |
1c8d13c8 | 749 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
750 | */ |
751 | int lttng_register_consumer(struct lttng_handle *handle, | |
752 | const char *socket_path) | |
753 | { | |
754 | struct lttcomm_session_msg lsm; | |
755 | ||
2f70b271 DG |
756 | if (handle == NULL || socket_path == NULL) { |
757 | return -LTTNG_ERR_INVALID; | |
758 | } | |
759 | ||
53efb85a | 760 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 761 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 762 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 763 | sizeof(lsm.session.name)); |
60160d2a | 764 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 765 | |
9ae110e2 JG |
766 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
767 | sizeof(lsm.u.reg.path)); | |
d9800920 | 768 | |
cac3069d | 769 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
770 | } |
771 | ||
1df4dedd | 772 | /* |
9ae110e2 JG |
773 | * Start tracing for all traces of the session. |
774 | * | |
775 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 776 | */ |
6a4f824d | 777 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 778 | { |
cd80958d DG |
779 | struct lttcomm_session_msg lsm; |
780 | ||
6a4f824d | 781 | if (session_name == NULL) { |
2f70b271 | 782 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
783 | } |
784 | ||
53efb85a | 785 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 786 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 787 | |
cac3069d DG |
788 | lttng_ctl_copy_string(lsm.session.name, session_name, |
789 | sizeof(lsm.session.name)); | |
cd80958d | 790 | |
cac3069d | 791 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 792 | } |
1df4dedd DG |
793 | |
794 | /* | |
38ee087f | 795 | * Stop tracing for all traces of the session. |
f3ed775e | 796 | */ |
38ee087f | 797 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 798 | { |
38ee087f | 799 | int ret, data_ret; |
cd80958d DG |
800 | struct lttcomm_session_msg lsm; |
801 | ||
6a4f824d | 802 | if (session_name == NULL) { |
2f70b271 | 803 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
804 | } |
805 | ||
53efb85a | 806 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 807 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 808 | |
cac3069d DG |
809 | lttng_ctl_copy_string(lsm.session.name, session_name, |
810 | sizeof(lsm.session.name)); | |
cd80958d | 811 | |
cac3069d | 812 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
813 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
814 | goto error; | |
815 | } | |
816 | ||
817 | if (!wait) { | |
818 | goto end; | |
819 | } | |
820 | ||
38ee087f DG |
821 | /* Check for data availability */ |
822 | do { | |
6d805429 | 823 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
824 | if (data_ret < 0) { |
825 | /* Return the data available call error. */ | |
826 | ret = data_ret; | |
827 | goto error; | |
828 | } | |
829 | ||
830 | /* | |
9ae110e2 JG |
831 | * Data sleep time before retrying (in usec). Don't sleep if the |
832 | * call returned value indicates availability. | |
38ee087f | 833 | */ |
6d805429 | 834 | if (data_ret) { |
c8f61fd4 | 835 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 836 | } |
6d805429 | 837 | } while (data_ret != 0); |
38ee087f | 838 | |
38ee087f DG |
839 | end: |
840 | error: | |
841 | return ret; | |
842 | } | |
843 | ||
844 | /* | |
845 | * Stop tracing and wait for data availability. | |
846 | */ | |
847 | int lttng_stop_tracing(const char *session_name) | |
848 | { | |
849 | return _lttng_stop_tracing(session_name, 1); | |
850 | } | |
851 | ||
852 | /* | |
853 | * Stop tracing but _don't_ wait for data availability. | |
854 | */ | |
855 | int lttng_stop_tracing_no_wait(const char *session_name) | |
856 | { | |
857 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
858 | } |
859 | ||
860 | /* | |
601d5acf DG |
861 | * Add context to a channel. |
862 | * | |
863 | * If the given channel is NULL, add the contexts to all channels. | |
864 | * The event_name param is ignored. | |
af87c45a DG |
865 | * |
866 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 867 | */ |
cd80958d | 868 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
869 | struct lttng_event_context *ctx, const char *event_name, |
870 | const char *channel_name) | |
d65106b1 | 871 | { |
2001793c JG |
872 | int ret; |
873 | size_t len = 0; | |
874 | char *buf = NULL; | |
cd80958d DG |
875 | struct lttcomm_session_msg lsm; |
876 | ||
9ae110e2 | 877 | /* Safety check. Both are mandatory. */ |
9d697d3d | 878 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
879 | ret = -LTTNG_ERR_INVALID; |
880 | goto end; | |
cd80958d DG |
881 | } |
882 | ||
441c16a7 | 883 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
884 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
885 | ||
85076754 MD |
886 | /* If no channel name, send empty string. */ |
887 | if (channel_name == NULL) { | |
888 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
889 | sizeof(lsm.u.context.channel_name)); | |
890 | } else { | |
891 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
892 | sizeof(lsm.u.context.channel_name)); | |
893 | } | |
cd80958d | 894 | |
60160d2a | 895 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cac3069d | 896 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
897 | sizeof(lsm.session.name)); |
898 | ||
2001793c JG |
899 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
900 | size_t provider_len, ctx_len; | |
901 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
902 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
903 | ||
904 | if (!provider_name || !ctx_name) { | |
905 | ret = -LTTNG_ERR_INVALID; | |
906 | goto end; | |
907 | } | |
908 | ||
909 | provider_len = strlen(provider_name); | |
910 | if (provider_len == 0) { | |
911 | ret = -LTTNG_ERR_INVALID; | |
912 | goto end; | |
913 | } | |
914 | lsm.u.context.provider_name_len = provider_len; | |
915 | ||
916 | ctx_len = strlen(ctx_name); | |
917 | if (ctx_len == 0) { | |
918 | ret = -LTTNG_ERR_INVALID; | |
919 | goto end; | |
920 | } | |
921 | lsm.u.context.context_name_len = ctx_len; | |
922 | ||
923 | len = provider_len + ctx_len; | |
924 | buf = zmalloc(len); | |
925 | if (!buf) { | |
926 | ret = -LTTNG_ERR_NOMEM; | |
927 | goto end; | |
928 | } | |
929 | ||
930 | memcpy(buf, provider_name, provider_len); | |
931 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
932 | } | |
933 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
934 | |
935 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
936 | /* | |
937 | * Don't leak application addresses to the sessiond. | |
938 | * This is only necessary when ctx is for an app ctx otherwise | |
939 | * the values inside the union (type & config) are overwritten. | |
940 | */ | |
941 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
942 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
943 | } | |
2001793c | 944 | |
795a978d | 945 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
946 | end: |
947 | free(buf); | |
948 | return ret; | |
d65106b1 DG |
949 | } |
950 | ||
f3ed775e | 951 | /* |
9ae110e2 JG |
952 | * Enable event(s) for a channel. |
953 | * | |
954 | * If no event name is specified, all events are enabled. | |
955 | * If no channel name is specified, the default 'channel0' is used. | |
956 | * | |
957 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 958 | */ |
cd80958d | 959 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 960 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 961 | { |
f8a96544 JI |
962 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
963 | NULL, 0, NULL); | |
1df4dedd DG |
964 | } |
965 | ||
53a80697 | 966 | /* |
025faf73 | 967 | * Create or enable an event with a filter expression. |
178191b3 | 968 | * |
53a80697 MD |
969 | * Return negative error value on error. |
970 | * Return size of returned session payload data if OK. | |
971 | */ | |
025faf73 | 972 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 973 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
974 | const char *filter_expression) |
975 | { | |
f8a96544 JI |
976 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
977 | filter_expression, 0, NULL); | |
53a80697 MD |
978 | } |
979 | ||
347c5ab5 | 980 | /* |
0e115563 | 981 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
982 | * NULL if not applicable. |
983 | * | |
984 | * An event with NO loglevel and the name is * will return NULL. | |
985 | */ | |
0e115563 | 986 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
987 | { |
988 | int err; | |
0e115563 | 989 | char *agent_filter = NULL; |
347c5ab5 DG |
990 | |
991 | assert(ev); | |
992 | ||
993 | /* Don't add filter for the '*' event. */ | |
9f449915 | 994 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 995 | if (filter) { |
0e115563 | 996 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
997 | ev->name); |
998 | } else { | |
0e115563 | 999 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1000 | } |
1001 | if (err < 0) { | |
1002 | PERROR("asprintf"); | |
6a556f7b | 1003 | goto error; |
347c5ab5 DG |
1004 | } |
1005 | } | |
1006 | ||
1007 | /* Add loglevel filtering if any for the JUL domain. */ | |
1008 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1009 | const char *op; |
347c5ab5 DG |
1010 | |
1011 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1012 | op = ">="; | |
1013 | } else { | |
1014 | op = "=="; | |
1015 | } | |
1016 | ||
0e115563 | 1017 | if (filter || agent_filter) { |
6a556f7b JG |
1018 | char *new_filter; |
1019 | ||
fb0edb23 | 1020 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 1021 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 1022 | ev->loglevel); |
0e115563 DG |
1023 | if (agent_filter) { |
1024 | free(agent_filter); | |
6a556f7b | 1025 | } |
0e115563 | 1026 | agent_filter = new_filter; |
347c5ab5 | 1027 | } else { |
0e115563 | 1028 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
1029 | ev->loglevel); |
1030 | } | |
1031 | if (err < 0) { | |
1032 | PERROR("asprintf"); | |
6a556f7b | 1033 | goto error; |
347c5ab5 DG |
1034 | } |
1035 | } | |
1036 | ||
0e115563 | 1037 | return agent_filter; |
6a556f7b | 1038 | error: |
0e115563 | 1039 | free(agent_filter); |
6a556f7b | 1040 | return NULL; |
347c5ab5 DG |
1041 | } |
1042 | ||
93deb080 JI |
1043 | /* |
1044 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1045 | * If no event name is specified, all events are enabled. | |
1046 | * If no channel name is specified, the default name is used. | |
1047 | * If filter expression is not NULL, the filter is set for the event. | |
1048 | * If exclusion count is not zero, the exclusions are set for the event. | |
1049 | * Returns size of returned session payload data or a negative error code. | |
1050 | */ | |
1051 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1052 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1053 | const char *original_filter_expression, |
93deb080 JI |
1054 | int exclusion_count, char **exclusion_list) |
1055 | { | |
1056 | struct lttcomm_session_msg lsm; | |
e368fb43 JG |
1057 | struct lttng_payload payload; |
1058 | int ret = 0, i; | |
137b9942 | 1059 | unsigned int free_filter_expression = 0; |
93deb080 | 1060 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1061 | |
6a0838b7 YL |
1062 | /* |
1063 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1064 | * a variable-length payload from where to send the data. |
6a0838b7 | 1065 | */ |
e368fb43 | 1066 | lttng_payload_init(&payload); |
ec005ec6 | 1067 | |
e9efbcd3 JG |
1068 | /* |
1069 | * Cast as non-const since we may replace the filter expression | |
1070 | * by a dynamically allocated string. Otherwise, the original | |
1071 | * string is not modified. | |
1072 | */ | |
1073 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1074 | |
1075 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1076 | ret = -LTTNG_ERR_INVALID; |
1077 | goto error; | |
93deb080 JI |
1078 | } |
1079 | ||
9ae110e2 JG |
1080 | /* |
1081 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1082 | * anyway, so treat this corner-case early to eliminate |
1083 | * lttng_fmemopen error for 0-byte allocation. | |
1084 | */ | |
1085 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1086 | ret = -LTTNG_ERR_INVALID; |
1087 | goto error; | |
93deb080 JI |
1088 | } |
1089 | ||
1090 | memset(&lsm, 0, sizeof(lsm)); | |
1091 | ||
1092 | /* If no channel name, send empty string. */ | |
1093 | if (channel_name == NULL) { | |
1094 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1095 | sizeof(lsm.u.enable.channel_name)); | |
1096 | } else { | |
1097 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1098 | sizeof(lsm.u.enable.channel_name)); | |
1099 | } | |
1100 | ||
18a720cd MD |
1101 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1102 | if (ev->name[0] == '\0') { | |
1103 | /* Enable all events */ | |
1104 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1105 | } |
93deb080 | 1106 | |
60160d2a | 1107 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1108 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1109 | ||
1110 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1111 | sizeof(lsm.session.name)); | |
1112 | lsm.u.enable.exclusion_count = exclusion_count; | |
1113 | lsm.u.enable.bytecode_len = 0; | |
1114 | ||
9ae110e2 | 1115 | /* Parse filter expression. */ |
5cdb6027 | 1116 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1117 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1118 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1119 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1120 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1121 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1122 | char *agent_filter; | |
64226865 | 1123 | |
347c5ab5 | 1124 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1125 | agent_filter = set_agent_filter(filter_expression, ev); |
1126 | if (!agent_filter) { | |
137b9942 | 1127 | if (!filter_expression) { |
9ae110e2 JG |
1128 | /* |
1129 | * No JUL and no filter, just skip | |
1130 | * everything below. | |
1131 | */ | |
137b9942 DG |
1132 | goto ask_sessiond; |
1133 | } | |
64226865 DG |
1134 | } else { |
1135 | /* | |
9ae110e2 JG |
1136 | * With an agent filter, the original filter has |
1137 | * been added to it thus replace the filter | |
1138 | * expression. | |
64226865 | 1139 | */ |
0e115563 | 1140 | filter_expression = agent_filter; |
e9efbcd3 | 1141 | free_filter_expression = 1; |
9b21e6d5 | 1142 | } |
9b21e6d5 | 1143 | } |
93deb080 | 1144 | |
e4d2f27a | 1145 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1146 | if (ret) { |
137b9942 | 1147 | goto filter_error; |
93deb080 | 1148 | } |
e4d2f27a JR |
1149 | |
1150 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1151 | + bytecode_get_len(&ctx->bytecode->b); | |
1152 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6b453b5e JG |
1153 | } |
1154 | ||
e368fb43 JG |
1155 | ret = lttng_dynamic_buffer_set_capacity(&payload.buffer, |
1156 | lsm.u.enable.bytecode_len + | |
1157 | lsm.u.enable.expression_len + | |
1158 | LTTNG_SYMBOL_NAME_LEN * | |
1159 | exclusion_count); | |
15e37663 | 1160 | if (ret) { |
6b453b5e | 1161 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1162 | goto mem_error; |
6b453b5e | 1163 | } |
137b9942 | 1164 | |
9ae110e2 | 1165 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1166 | for (i = 0; i < exclusion_count; i++) { |
1167 | size_t exclusion_len; | |
1168 | ||
1169 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1170 | LTTNG_SYMBOL_NAME_LEN); | |
1171 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1172 | /* Exclusion is not NULL-terminated. */ | |
1173 | ret = -LTTNG_ERR_INVALID; | |
1174 | goto mem_error; | |
1175 | } | |
1176 | ||
e368fb43 JG |
1177 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
1178 | *(exclusion_list + i), LTTNG_SYMBOL_NAME_LEN); | |
15e37663 JG |
1179 | if (ret) { |
1180 | goto mem_error; | |
1181 | } | |
6b453b5e | 1182 | } |
15e37663 | 1183 | |
9ae110e2 | 1184 | /* Add filter expression next. */ |
15e37663 | 1185 | if (filter_expression) { |
e368fb43 | 1186 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1187 | filter_expression, lsm.u.enable.expression_len); |
1188 | if (ret) { | |
1189 | goto mem_error; | |
1190 | } | |
6b453b5e | 1191 | } |
9ae110e2 | 1192 | /* Add filter bytecode next. */ |
137b9942 | 1193 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
e368fb43 | 1194 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1195 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); |
1196 | if (ret) { | |
1197 | goto mem_error; | |
1198 | } | |
1199 | } | |
1200 | if (ev->extended.ptr) { | |
1201 | struct lttng_event_extended *ev_ext = | |
1202 | (struct lttng_event_extended *) ev->extended.ptr; | |
1203 | ||
1204 | if (ev_ext->probe_location) { | |
1205 | /* | |
1206 | * lttng_userspace_probe_location_serialize returns the | |
1207 | * number of bytes that was appended to the buffer. | |
1208 | */ | |
1209 | ret = lttng_userspace_probe_location_serialize( | |
e368fb43 | 1210 | ev_ext->probe_location, &payload); |
56f0bc67 | 1211 | if (ret < 0) { |
15e37663 JG |
1212 | goto mem_error; |
1213 | } | |
1214 | ||
15e37663 JG |
1215 | /* |
1216 | * Set the size of the userspace probe location element | |
1217 | * of the buffer so that the receiving side knows where | |
1218 | * to split it. | |
1219 | */ | |
1220 | lsm.u.enable.userspace_probe_location_len = ret; | |
1221 | } | |
93deb080 JI |
1222 | } |
1223 | ||
e368fb43 JG |
1224 | { |
1225 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1226 | &payload, 0, -1); | |
fe489250 | 1227 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1228 | int fd_to_send; |
1229 | ||
1230 | if (fd_count < 0) { | |
1231 | goto mem_error; | |
1232 | } | |
1233 | ||
1234 | assert(fd_count == 0 || fd_count == 1); | |
1235 | if (fd_count == 1) { | |
fe489250 JG |
1236 | struct fd_handle *handle = |
1237 | lttng_payload_view_pop_fd_handle(&view); | |
1238 | ||
1239 | if (!handle) { | |
e368fb43 JG |
1240 | goto mem_error; |
1241 | } | |
1242 | ||
fe489250 JG |
1243 | fd_to_send = fd_handle_get_fd(handle); |
1244 | fd_handle_put(handle); | |
e368fb43 JG |
1245 | } |
1246 | ||
1247 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1248 | fd_count ? &fd_to_send : NULL, fd_count, | |
1249 | view.buffer.size ? view.buffer.data : NULL, | |
1250 | view.buffer.size, NULL, NULL, 0); | |
1251 | } | |
93deb080 | 1252 | |
7ca1dc6f DG |
1253 | mem_error: |
1254 | if (filter_expression && ctx) { | |
93deb080 JI |
1255 | filter_bytecode_free(ctx); |
1256 | filter_ir_free(ctx); | |
1257 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1258 | } |
1259 | filter_error: | |
1260 | if (free_filter_expression) { | |
1261 | /* | |
9ae110e2 JG |
1262 | * The filter expression has been replaced and must be freed as |
1263 | * it is not the original filter expression received as a | |
1264 | * parameter. | |
7ca1dc6f DG |
1265 | */ |
1266 | free(filter_expression); | |
93deb080 | 1267 | } |
137b9942 DG |
1268 | error: |
1269 | /* | |
9ae110e2 JG |
1270 | * Return directly to the caller and don't ask the sessiond since |
1271 | * something went wrong in the parsing of data above. | |
137b9942 | 1272 | */ |
e368fb43 | 1273 | lttng_payload_reset(&payload); |
93deb080 | 1274 | return ret; |
3e1c9ff7 DG |
1275 | |
1276 | ask_sessiond: | |
1277 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1278 | return ret; | |
93deb080 JI |
1279 | } |
1280 | ||
6e911cad MD |
1281 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1282 | struct lttng_event *ev, const char *channel_name, | |
1283 | const char *original_filter_expression) | |
1df4dedd | 1284 | { |
cd80958d | 1285 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1286 | char *varlen_data; |
1287 | int ret = 0; | |
1288 | unsigned int free_filter_expression = 0; | |
1289 | struct filter_parser_ctx *ctx = NULL; | |
1290 | /* | |
1291 | * Cast as non-const since we may replace the filter expression | |
1292 | * by a dynamically allocated string. Otherwise, the original | |
1293 | * string is not modified. | |
1294 | */ | |
1295 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1296 | |
6e911cad MD |
1297 | if (handle == NULL || ev == NULL) { |
1298 | ret = -LTTNG_ERR_INVALID; | |
1299 | goto error; | |
1300 | } | |
1301 | ||
9ae110e2 JG |
1302 | /* |
1303 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1304 | * anyway, so treat this corner-case early to eliminate |
1305 | * lttng_fmemopen error for 0-byte allocation. | |
1306 | */ | |
1307 | if (filter_expression && filter_expression[0] == '\0') { | |
1308 | ret = -LTTNG_ERR_INVALID; | |
1309 | goto error; | |
cd80958d DG |
1310 | } |
1311 | ||
441c16a7 MD |
1312 | memset(&lsm, 0, sizeof(lsm)); |
1313 | ||
85076754 MD |
1314 | /* If no channel name, send empty string. */ |
1315 | if (channel_name == NULL) { | |
1316 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1317 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1318 | } else { |
85076754 | 1319 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1320 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1321 | } |
1322 | ||
18a720cd | 1323 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1324 | |
60160d2a | 1325 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1326 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1327 | ||
cac3069d | 1328 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1329 | sizeof(lsm.session.name)); |
6e911cad | 1330 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1331 | |
6e911cad MD |
1332 | /* |
1333 | * For the JUL domain, a filter is enforced except for the | |
1334 | * disable all event. This is done to avoid having the event in | |
1335 | * all sessions thus filtering by logger name. | |
1336 | */ | |
1337 | if (filter_expression == NULL && | |
1338 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1339 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1340 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1341 | goto ask_sessiond; |
1342 | } | |
1343 | ||
1344 | /* | |
1345 | * We have a filter, so we need to set up a variable-length | |
1346 | * memory block from where to send the data. | |
1347 | */ | |
1348 | ||
1349 | /* Parse filter expression */ | |
1350 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1351 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1352 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1353 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1354 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1355 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1356 | char *agent_filter; | |
6e911cad MD |
1357 | |
1358 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1359 | agent_filter = set_agent_filter(filter_expression, ev); |
1360 | if (!agent_filter) { | |
6e911cad | 1361 | if (!filter_expression) { |
9ae110e2 JG |
1362 | /* |
1363 | * No JUL and no filter, just skip | |
1364 | * everything below. | |
1365 | */ | |
6e911cad MD |
1366 | goto ask_sessiond; |
1367 | } | |
1368 | } else { | |
1369 | /* | |
9ae110e2 JG |
1370 | * With a JUL filter, the original filter has |
1371 | * been added to it thus replace the filter | |
1372 | * expression. | |
6e911cad | 1373 | */ |
0e115563 | 1374 | filter_expression = agent_filter; |
6e911cad MD |
1375 | free_filter_expression = 1; |
1376 | } | |
1377 | } | |
1378 | ||
e4d2f27a | 1379 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad MD |
1380 | if (ret) { |
1381 | goto filter_error; | |
1382 | } | |
e4d2f27a JR |
1383 | |
1384 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1385 | + bytecode_get_len(&ctx->bytecode->b); | |
1386 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6e911cad MD |
1387 | } |
1388 | ||
1389 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1390 | + lsm.u.disable.expression_len); | |
1391 | if (!varlen_data) { | |
1392 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1393 | goto mem_error; | |
1394 | } | |
1395 | ||
9ae110e2 | 1396 | /* Add filter expression. */ |
6e911cad MD |
1397 | if (lsm.u.disable.expression_len != 0) { |
1398 | memcpy(varlen_data, | |
1399 | filter_expression, | |
1400 | lsm.u.disable.expression_len); | |
1401 | } | |
9ae110e2 | 1402 | /* Add filter bytecode next. */ |
6e911cad MD |
1403 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1404 | memcpy(varlen_data | |
1405 | + lsm.u.disable.expression_len, | |
1406 | &ctx->bytecode->b, | |
1407 | lsm.u.disable.bytecode_len); | |
1408 | } | |
1409 | ||
795a978d | 1410 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1411 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1412 | free(varlen_data); | |
1413 | ||
1414 | mem_error: | |
1415 | if (filter_expression && ctx) { | |
1416 | filter_bytecode_free(ctx); | |
1417 | filter_ir_free(ctx); | |
1418 | filter_parser_ctx_free(ctx); | |
1419 | } | |
1420 | filter_error: | |
1421 | if (free_filter_expression) { | |
1422 | /* | |
9ae110e2 JG |
1423 | * The filter expression has been replaced and must be freed as |
1424 | * it is not the original filter expression received as a | |
1425 | * parameter. | |
6e911cad MD |
1426 | */ |
1427 | free(filter_expression); | |
1428 | } | |
1429 | error: | |
1430 | /* | |
9ae110e2 JG |
1431 | * Return directly to the caller and don't ask the sessiond since |
1432 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1433 | */ |
1434 | return ret; | |
1435 | ||
1436 | ask_sessiond: | |
1437 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1438 | return ret; | |
1439 | } | |
1440 | ||
1441 | /* | |
9ae110e2 JG |
1442 | * Disable event(s) of a channel and domain. |
1443 | * If no event name is specified, all events are disabled. | |
1444 | * If no channel name is specified, the default 'channel0' is used. | |
1445 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1446 | */ |
1447 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1448 | const char *channel_name) | |
1449 | { | |
1450 | struct lttng_event ev; | |
1451 | ||
1452 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1453 | ev.loglevel = -1; |
6e911cad MD |
1454 | ev.type = LTTNG_EVENT_ALL; |
1455 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1456 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1457 | } |
1458 | ||
cf0bcb51 JG |
1459 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1460 | { | |
1461 | struct lttng_channel *channel = NULL; | |
1462 | struct lttng_channel_extended *extended = NULL; | |
1463 | ||
1464 | if (!domain) { | |
1465 | goto error; | |
1466 | } | |
1467 | ||
1468 | /* Validate domain. */ | |
1469 | switch (domain->type) { | |
1470 | case LTTNG_DOMAIN_UST: | |
1471 | switch (domain->buf_type) { | |
1472 | case LTTNG_BUFFER_PER_UID: | |
1473 | case LTTNG_BUFFER_PER_PID: | |
1474 | break; | |
1475 | default: | |
1476 | goto error; | |
1477 | } | |
1478 | break; | |
1479 | case LTTNG_DOMAIN_KERNEL: | |
1480 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1481 | goto error; | |
1482 | } | |
1483 | break; | |
1484 | default: | |
1485 | goto error; | |
1486 | } | |
1487 | ||
1488 | channel = zmalloc(sizeof(*channel)); | |
1489 | if (!channel) { | |
1490 | goto error; | |
1491 | } | |
1492 | ||
1493 | extended = zmalloc(sizeof(*extended)); | |
1494 | if (!extended) { | |
1495 | goto error; | |
1496 | } | |
1497 | ||
1498 | channel->attr.extended.ptr = extended; | |
1499 | ||
1500 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1501 | return channel; | |
1502 | error: | |
1503 | free(channel); | |
1504 | free(extended); | |
1505 | return NULL; | |
1506 | } | |
1507 | ||
1508 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1509 | { | |
1510 | if (!channel) { | |
1511 | return; | |
1512 | } | |
1513 | ||
1514 | if (channel->attr.extended.ptr) { | |
1515 | free(channel->attr.extended.ptr); | |
1516 | } | |
1517 | free(channel); | |
1518 | } | |
1519 | ||
1df4dedd | 1520 | /* |
9ae110e2 JG |
1521 | * Enable channel per domain |
1522 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1523 | */ |
cd80958d | 1524 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1525 | struct lttng_channel *in_chan) |
a5c5a2bd | 1526 | { |
cd80958d | 1527 | struct lttcomm_session_msg lsm; |
09b72f7a | 1528 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1529 | |
9ae110e2 | 1530 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1531 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1532 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1533 | } |
1534 | ||
441c16a7 | 1535 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1536 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1537 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1538 | |
cf0bcb51 JG |
1539 | if (!in_chan->attr.extended.ptr) { |
1540 | struct lttng_channel *channel; | |
1541 | struct lttng_channel_extended *extended; | |
7d29a247 | 1542 | |
cf0bcb51 JG |
1543 | channel = lttng_channel_create(&handle->domain); |
1544 | if (!channel) { | |
1545 | return -LTTNG_ERR_NOMEM; | |
1546 | } | |
1547 | ||
1548 | /* | |
1549 | * Create a new channel in order to use default extended | |
1550 | * attribute values. | |
1551 | */ | |
1552 | extended = (struct lttng_channel_extended *) | |
1553 | channel->attr.extended.ptr; | |
1554 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1555 | lttng_channel_destroy(channel); | |
1556 | } else { | |
1557 | struct lttng_channel_extended *extended; | |
1558 | ||
1559 | extended = (struct lttng_channel_extended *) | |
1560 | in_chan->attr.extended.ptr; | |
1561 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1562 | } | |
cd80958d | 1563 | |
09b72f7a FD |
1564 | /* |
1565 | * Verify that the amount of memory required to create the requested | |
1566 | * buffer is available on the system at the moment. | |
1567 | */ | |
1568 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1569 | lsm.u.channel.chan.attr.subbuf_size; | |
1570 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1571 | return -LTTNG_ERR_NOMEM; | |
1572 | } | |
1573 | ||
cf0bcb51 | 1574 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1575 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1576 | |
cac3069d | 1577 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1578 | sizeof(lsm.session.name)); |
1579 | ||
cac3069d | 1580 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1581 | } |
1df4dedd | 1582 | |
2ef84c95 | 1583 | /* |
9ae110e2 JG |
1584 | * All tracing will be stopped for registered events of the channel. |
1585 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1586 | */ |
cd80958d | 1587 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1588 | { |
cd80958d DG |
1589 | struct lttcomm_session_msg lsm; |
1590 | ||
9ae110e2 | 1591 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1592 | if (handle == NULL || name == NULL) { |
2f70b271 | 1593 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1594 | } |
1595 | ||
441c16a7 MD |
1596 | memset(&lsm, 0, sizeof(lsm)); |
1597 | ||
cd80958d | 1598 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1599 | |
cac3069d | 1600 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1601 | sizeof(lsm.u.disable.channel_name)); |
1602 | ||
60160d2a | 1603 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1604 | |
cac3069d | 1605 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1606 | sizeof(lsm.session.name)); |
1607 | ||
cac3069d | 1608 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1609 | } |
1610 | ||
fac6795d | 1611 | /* |
9ae110e2 JG |
1612 | * Lists all available tracepoints of domain. |
1613 | * Sets the contents of the events array. | |
1614 | * Returns the number of lttng_event entries in events; | |
1615 | * on error, returns a negative value. | |
fac6795d | 1616 | */ |
cd80958d | 1617 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1618 | struct lttng_event **events) |
fac6795d | 1619 | { |
052da939 | 1620 | int ret; |
cd80958d DG |
1621 | struct lttcomm_session_msg lsm; |
1622 | ||
9d697d3d | 1623 | if (handle == NULL) { |
2f70b271 | 1624 | return -LTTNG_ERR_INVALID; |
cd80958d | 1625 | } |
fac6795d | 1626 | |
53efb85a | 1627 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1628 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1629 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1630 | |
cac3069d | 1631 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1632 | if (ret < 0) { |
1633 | return ret; | |
eb354453 | 1634 | } |
fac6795d | 1635 | |
9f19cc17 | 1636 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1637 | } |
1638 | ||
f37d259d | 1639 | /* |
9ae110e2 JG |
1640 | * Lists all available tracepoint fields of domain. |
1641 | * Sets the contents of the event field array. | |
1642 | * Returns the number of lttng_event_field entries in events; | |
1643 | * on error, returns a negative value. | |
f37d259d MD |
1644 | */ |
1645 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1646 | struct lttng_event_field **fields) | |
1647 | { | |
1648 | int ret; | |
1649 | struct lttcomm_session_msg lsm; | |
1650 | ||
1651 | if (handle == NULL) { | |
2f70b271 | 1652 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1653 | } |
1654 | ||
53efb85a | 1655 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1656 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1657 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1658 | |
cac3069d | 1659 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1660 | if (ret < 0) { |
1661 | return ret; | |
1662 | } | |
1663 | ||
1664 | return ret / sizeof(struct lttng_event_field); | |
1665 | } | |
1666 | ||
834978fd | 1667 | /* |
9ae110e2 JG |
1668 | * Lists all available kernel system calls. Allocates and sets the contents of |
1669 | * the events array. | |
834978fd | 1670 | * |
9ae110e2 JG |
1671 | * Returns the number of lttng_event entries in events; on error, returns a |
1672 | * negative value. | |
834978fd DG |
1673 | */ |
1674 | int lttng_list_syscalls(struct lttng_event **events) | |
1675 | { | |
1676 | int ret; | |
1677 | struct lttcomm_session_msg lsm; | |
1678 | ||
1679 | if (!events) { | |
1680 | return -LTTNG_ERR_INVALID; | |
1681 | } | |
1682 | ||
1683 | memset(&lsm, 0, sizeof(lsm)); | |
1684 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1685 | /* Force kernel domain for system calls. */ | |
1686 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1687 | ||
1688 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1689 | if (ret < 0) { | |
1690 | return ret; | |
1691 | } | |
1692 | ||
1693 | return ret / sizeof(struct lttng_event); | |
1694 | } | |
1695 | ||
1657e9bb | 1696 | /* |
9ae110e2 JG |
1697 | * Returns a human readable string describing |
1698 | * the error code (a negative value). | |
1657e9bb | 1699 | */ |
9a745bc7 | 1700 | const char *lttng_strerror(int code) |
1657e9bb | 1701 | { |
f73fabfd | 1702 | return error_get_str(code); |
1657e9bb DG |
1703 | } |
1704 | ||
b178f53e JG |
1705 | enum lttng_error_code lttng_create_session_ext( |
1706 | struct lttng_session_descriptor *session_descriptor) | |
1707 | { | |
1708 | enum lttng_error_code ret_code; | |
1709 | struct lttcomm_session_msg lsm = { | |
1710 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1711 | }; | |
1712 | void *reply = NULL; | |
1713 | struct lttng_buffer_view reply_view; | |
1714 | int reply_ret; | |
1715 | bool sessiond_must_generate_ouput; | |
1716 | struct lttng_dynamic_buffer payload; | |
1717 | int ret; | |
1718 | size_t descriptor_size; | |
1719 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1720 | ||
1721 | lttng_dynamic_buffer_init(&payload); | |
1722 | if (!session_descriptor) { | |
1723 | ret_code = LTTNG_ERR_INVALID; | |
1724 | goto end; | |
1725 | } | |
1726 | ||
1727 | sessiond_must_generate_ouput = | |
1728 | !lttng_session_descriptor_is_output_destination_initialized( | |
1729 | session_descriptor); | |
1730 | if (sessiond_must_generate_ouput) { | |
1731 | const char *home_dir = utils_get_home_dir(); | |
1732 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1733 | ||
1734 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1735 | ret_code = LTTNG_ERR_FATAL; | |
1736 | goto end; | |
1737 | } | |
1738 | ||
1739 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1740 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1741 | home_dir_len); | |
1742 | if (ret) { | |
1743 | ret_code = LTTNG_ERR_NOMEM; | |
1744 | goto end; | |
1745 | } | |
1746 | } | |
1747 | ||
1748 | descriptor_size = payload.size; | |
1749 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1750 | &payload); | |
1751 | if (ret) { | |
1752 | ret_code = LTTNG_ERR_INVALID; | |
1753 | goto end; | |
1754 | } | |
1755 | descriptor_size = payload.size - descriptor_size; | |
1756 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1757 | ||
1758 | /* Command returns a session descriptor on success. */ | |
1759 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1760 | payload.size, &reply); | |
1761 | if (reply_ret < 0) { | |
1762 | ret_code = -reply_ret; | |
1763 | goto end; | |
1764 | } else if (reply_ret == 0) { | |
1765 | /* Socket unexpectedly closed by the session daemon. */ | |
1766 | ret_code = LTTNG_ERR_FATAL; | |
1767 | goto end; | |
1768 | } | |
1769 | ||
1770 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1771 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1772 | &descriptor_reply); | |
1773 | if (ret < 0) { | |
1774 | ret_code = LTTNG_ERR_FATAL; | |
1775 | goto end; | |
1776 | } | |
1777 | ret_code = LTTNG_OK; | |
1778 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1779 | end: | |
1780 | free(reply); | |
1781 | lttng_dynamic_buffer_reset(&payload); | |
1782 | lttng_session_descriptor_destroy(descriptor_reply); | |
1783 | return ret_code; | |
1784 | } | |
1785 | ||
aaf97519 | 1786 | /* |
b178f53e | 1787 | * Create a new session using name and url for destination. |
a4b92340 | 1788 | * |
780d4bb8 | 1789 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1790 | */ |
a4b92340 | 1791 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1792 | { |
3dd05a85 | 1793 | int ret; |
a4b92340 | 1794 | ssize_t size; |
a4b92340 | 1795 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1796 | struct lttng_session_descriptor *descriptor = NULL; |
1797 | enum lttng_error_code ret_code; | |
00e2e675 | 1798 | |
b178f53e JG |
1799 | if (!name) { |
1800 | ret = -LTTNG_ERR_INVALID; | |
1801 | goto end; | |
00e2e675 DG |
1802 | } |
1803 | ||
bc894455 | 1804 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1805 | if (size < 0) { |
b178f53e JG |
1806 | ret = -LTTNG_ERR_INVALID; |
1807 | goto end; | |
1808 | } | |
1809 | switch (size) { | |
1810 | case 0: | |
1811 | descriptor = lttng_session_descriptor_create(name); | |
1812 | break; | |
1813 | case 1: | |
1814 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1815 | ret = -LTTNG_ERR_INVALID; | |
1816 | goto end; | |
1817 | } | |
1818 | descriptor = lttng_session_descriptor_local_create(name, | |
1819 | uris[0].dst.path); | |
1820 | break; | |
1821 | case 2: | |
1822 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1823 | NULL); | |
1824 | break; | |
1825 | default: | |
1826 | ret = -LTTNG_ERR_INVALID; | |
1827 | goto end; | |
1828 | } | |
1829 | if (!descriptor) { | |
1830 | ret = -LTTNG_ERR_INVALID; | |
1831 | goto end; | |
00e2e675 | 1832 | } |
b178f53e JG |
1833 | ret_code = lttng_create_session_ext(descriptor); |
1834 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1835 | end: | |
1836 | lttng_session_descriptor_destroy(descriptor); | |
1837 | free(uris); | |
1838 | return ret; | |
1839 | } | |
00e2e675 | 1840 | |
b178f53e JG |
1841 | /* |
1842 | * Create a session exclusively used for snapshot. | |
1843 | * | |
780d4bb8 | 1844 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1845 | */ |
1846 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1847 | { | |
1848 | int ret; | |
1849 | enum lttng_error_code ret_code; | |
1850 | ssize_t size; | |
1851 | struct lttng_uri *uris = NULL; | |
1852 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1853 | |
b178f53e JG |
1854 | if (!name) { |
1855 | ret = -LTTNG_ERR_INVALID; | |
1856 | goto end; | |
1857 | } | |
1858 | ||
1859 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1860 | if (size < 0) { | |
1861 | ret = -LTTNG_ERR_INVALID; | |
1862 | goto end; | |
1863 | } | |
1864 | /* | |
1865 | * If the user does not specify a custom subdir, use the session name. | |
1866 | */ | |
1867 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1868 | strlen(uris[0].subdir) == 0) { | |
1869 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1870 | name); | |
1871 | if (ret < 0) { | |
1872 | PERROR("Failed to set session name as network destination sub-directory"); | |
1873 | ret = -LTTNG_ERR_FATAL; | |
1874 | goto end; | |
1875 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1876 | /* Truncated output. */ | |
1877 | ret = -LTTNG_ERR_INVALID; | |
1878 | goto end; | |
1879 | } | |
1880 | } | |
3dd05a85 | 1881 | |
b178f53e JG |
1882 | switch (size) { |
1883 | case 0: | |
1884 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1885 | break; | |
1886 | case 1: | |
1887 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1888 | ret = -LTTNG_ERR_INVALID; | |
1889 | goto end; | |
1890 | } | |
1891 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1892 | name, | |
1893 | uris[0].dst.path); | |
1894 | break; | |
1895 | case 2: | |
1896 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1897 | name, | |
1898 | snapshot_url, | |
1899 | NULL); | |
1900 | break; | |
1901 | default: | |
1902 | ret = -LTTNG_ERR_INVALID; | |
1903 | goto end; | |
1904 | } | |
1905 | if (!descriptor) { | |
1906 | ret = -LTTNG_ERR_INVALID; | |
1907 | goto end; | |
1908 | } | |
1909 | ret_code = lttng_create_session_ext(descriptor); | |
1910 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1911 | end: | |
1912 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1913 | free(uris); |
1914 | return ret; | |
00e2e675 DG |
1915 | } |
1916 | ||
b178f53e JG |
1917 | /* |
1918 | * Create a session exclusively used for live. | |
1919 | * | |
780d4bb8 | 1920 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1921 | */ |
1922 | int lttng_create_session_live(const char *name, const char *url, | |
1923 | unsigned int timer_interval) | |
1924 | { | |
1925 | int ret; | |
1926 | enum lttng_error_code ret_code; | |
1927 | struct lttng_session_descriptor *descriptor = NULL; | |
1928 | ||
1929 | if (!name) { | |
1930 | ret = -LTTNG_ERR_INVALID; | |
1931 | goto end; | |
1932 | } | |
1933 | ||
1934 | if (url) { | |
1935 | descriptor = lttng_session_descriptor_live_network_create( | |
1936 | name, url, NULL, timer_interval); | |
1937 | } else { | |
1938 | descriptor = lttng_session_descriptor_live_create( | |
1939 | name, timer_interval); | |
1940 | } | |
1941 | if (!descriptor) { | |
1942 | ret = -LTTNG_ERR_INVALID; | |
1943 | goto end; | |
1944 | } | |
1945 | ret_code = lttng_create_session_ext(descriptor); | |
1946 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1947 | end: | |
1948 | lttng_session_descriptor_destroy(descriptor); | |
1949 | return ret; | |
1950 | } | |
1951 | ||
e20ee7c2 JD |
1952 | /* |
1953 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
1954 | * |
1955 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
1956 | */ |
1957 | int lttng_destroy_session(const char *session_name) | |
1958 | { | |
1959 | int ret; | |
3e3665b8 JG |
1960 | enum lttng_error_code ret_code; |
1961 | enum lttng_destruction_handle_status status; | |
1962 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
1963 | |
1964 | /* | |
3e3665b8 JG |
1965 | * Stop the tracing and wait for the data to be |
1966 | * consumed. | |
e20ee7c2 JD |
1967 | */ |
1968 | ret = _lttng_stop_tracing(session_name, 1); | |
1969 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1970 | goto end; | |
1971 | } | |
1972 | ||
3e3665b8 JG |
1973 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
1974 | if (ret_code != LTTNG_OK) { | |
1975 | ret = (int) -ret_code; | |
1976 | goto end; | |
1977 | } | |
1978 | assert(handle); | |
1979 | ||
1980 | /* Block until the completion of the destruction of the session. */ | |
1981 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
1982 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
1983 | ret = -LTTNG_ERR_UNK; | |
1984 | goto end; | |
1985 | } | |
1986 | ||
1987 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
1988 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
1989 | ret = -LTTNG_ERR_UNK; | |
1990 | goto end; | |
1991 | } | |
780d4bb8 | 1992 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 1993 | end: |
3e3665b8 | 1994 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
1995 | return ret; |
1996 | } | |
1997 | ||
1998 | /* | |
1999 | * Destroy the session without waiting for the data. | |
2000 | */ | |
2001 | int lttng_destroy_session_no_wait(const char *session_name) | |
2002 | { | |
3e3665b8 | 2003 | enum lttng_error_code ret_code; |
e20ee7c2 | 2004 | |
3e3665b8 JG |
2005 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
2006 | return ret_code == LTTNG_OK ? ret_code : -ret_code; | |
e20ee7c2 JD |
2007 | } |
2008 | ||
57167058 | 2009 | /* |
9ae110e2 JG |
2010 | * Ask the session daemon for all available sessions. |
2011 | * Sets the contents of the sessions array. | |
2012 | * Returns the number of lttng_session entries in sessions; | |
2013 | * on error, returns a negative value. | |
57167058 | 2014 | */ |
b178f53e | 2015 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2016 | { |
ca95a216 | 2017 | int ret; |
cd80958d | 2018 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2019 | const size_t session_size = sizeof(struct lttng_session) + |
2020 | sizeof(struct lttng_session_extended); | |
2021 | size_t session_count, i; | |
2022 | struct lttng_session_extended *sessions_extended_begin; | |
2023 | struct lttng_session *sessions = NULL; | |
57167058 | 2024 | |
53efb85a | 2025 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2026 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
b178f53e JG |
2027 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2028 | if (ret <= 0) { | |
b178f53e JG |
2029 | goto end; |
2030 | } | |
2031 | if (!sessions) { | |
2032 | ret = -LTTNG_ERR_FATAL; | |
2033 | goto end; | |
2034 | } | |
2035 | ||
2036 | if (ret % session_size) { | |
2037 | ret = -LTTNG_ERR_UNK; | |
2038 | free(sessions); | |
2039 | *out_sessions = NULL; | |
2040 | goto end; | |
57167058 | 2041 | } |
b178f53e JG |
2042 | session_count = (size_t) ret / session_size; |
2043 | sessions_extended_begin = (struct lttng_session_extended *) | |
2044 | (&sessions[session_count]); | |
57167058 | 2045 | |
b178f53e JG |
2046 | /* Set extended session info pointers. */ |
2047 | for (i = 0; i < session_count; i++) { | |
2048 | struct lttng_session *session = &sessions[i]; | |
2049 | struct lttng_session_extended *extended = | |
2050 | &(sessions_extended_begin[i]); | |
2051 | ||
2052 | session->extended.ptr = extended; | |
2053 | } | |
2054 | ||
2055 | ret = (int) session_count; | |
2056 | *out_sessions = sessions; | |
2057 | end: | |
2058 | return ret; | |
2059 | } | |
2060 | ||
2061 | enum lttng_error_code lttng_session_get_creation_time( | |
2062 | const struct lttng_session *session, uint64_t *creation_time) | |
2063 | { | |
2064 | enum lttng_error_code ret = LTTNG_OK; | |
2065 | struct lttng_session_extended *extended; | |
2066 | ||
2067 | if (!session || !creation_time || !session->extended.ptr) { | |
2068 | ret = LTTNG_ERR_INVALID; | |
2069 | goto end; | |
2070 | } | |
2071 | ||
2072 | extended = session->extended.ptr; | |
2073 | if (!extended->creation_time.is_set) { | |
2074 | /* Not created on the session daemon yet. */ | |
2075 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2076 | goto end; | |
2077 | } | |
2078 | *creation_time = extended->creation_time.value; | |
2079 | end: | |
2080 | return ret; | |
57167058 DG |
2081 | } |
2082 | ||
d7ba1388 MD |
2083 | int lttng_set_session_shm_path(const char *session_name, |
2084 | const char *shm_path) | |
2085 | { | |
2086 | struct lttcomm_session_msg lsm; | |
2087 | ||
2088 | if (session_name == NULL) { | |
2089 | return -LTTNG_ERR_INVALID; | |
2090 | } | |
2091 | ||
2092 | memset(&lsm, 0, sizeof(lsm)); | |
2093 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2094 | ||
2095 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2096 | sizeof(lsm.session.name)); | |
2097 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
2098 | sizeof(lsm.u.set_shm_path.shm_path)); | |
2099 | ||
2100 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
2101 | } | |
2102 | ||
9f19cc17 | 2103 | /* |
9ae110e2 JG |
2104 | * Ask the session daemon for all available domains of a session. |
2105 | * Sets the contents of the domains array. | |
2106 | * Returns the number of lttng_domain entries in domains; | |
2107 | * on error, returns a negative value. | |
9f19cc17 | 2108 | */ |
330be774 | 2109 | int lttng_list_domains(const char *session_name, |
cd80958d | 2110 | struct lttng_domain **domains) |
9f19cc17 DG |
2111 | { |
2112 | int ret; | |
cd80958d DG |
2113 | struct lttcomm_session_msg lsm; |
2114 | ||
330be774 | 2115 | if (session_name == NULL) { |
2f70b271 | 2116 | return -LTTNG_ERR_INVALID; |
cd80958d | 2117 | } |
9f19cc17 | 2118 | |
53efb85a | 2119 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2120 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2121 | ||
cac3069d DG |
2122 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2123 | sizeof(lsm.session.name)); | |
cd80958d | 2124 | |
cac3069d | 2125 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
2126 | if (ret < 0) { |
2127 | return ret; | |
2128 | } | |
2129 | ||
2130 | return ret / sizeof(struct lttng_domain); | |
2131 | } | |
2132 | ||
2133 | /* | |
9ae110e2 JG |
2134 | * Ask the session daemon for all available channels of a session. |
2135 | * Sets the contents of the channels array. | |
2136 | * Returns the number of lttng_channel entries in channels; | |
2137 | * on error, returns a negative value. | |
9f19cc17 | 2138 | */ |
cd80958d DG |
2139 | int lttng_list_channels(struct lttng_handle *handle, |
2140 | struct lttng_channel **channels) | |
9f19cc17 DG |
2141 | { |
2142 | int ret; | |
53e367f9 JG |
2143 | size_t channel_count, i; |
2144 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2145 | sizeof(struct lttng_channel_extended); |
cd80958d | 2146 | struct lttcomm_session_msg lsm; |
53e367f9 | 2147 | void *extended_at; |
cd80958d | 2148 | |
9d697d3d | 2149 | if (handle == NULL) { |
53e367f9 JG |
2150 | ret = -LTTNG_ERR_INVALID; |
2151 | goto end; | |
cd80958d DG |
2152 | } |
2153 | ||
53efb85a | 2154 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2155 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 2156 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2157 | sizeof(lsm.session.name)); |
9f19cc17 | 2158 | |
60160d2a | 2159 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2160 | |
cac3069d | 2161 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2162 | if (ret < 0) { |
53e367f9 JG |
2163 | goto end; |
2164 | } | |
2165 | ||
2166 | if (ret % channel_size) { | |
2167 | ret = -LTTNG_ERR_UNK; | |
2168 | free(*channels); | |
2169 | *channels = NULL; | |
2170 | goto end; | |
9f19cc17 | 2171 | } |
53e367f9 | 2172 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2173 | |
53e367f9 JG |
2174 | /* Set extended info pointers */ |
2175 | extended_at = ((void *) *channels) + | |
2176 | channel_count * sizeof(struct lttng_channel); | |
2177 | for (i = 0; i < channel_count; i++) { | |
2178 | struct lttng_channel *chan = &(*channels)[i]; | |
2179 | ||
2180 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2181 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2182 | } |
2183 | ||
2184 | ret = (int) channel_count; | |
2185 | end: | |
2186 | return ret; | |
9f19cc17 DG |
2187 | } |
2188 | ||
2189 | /* | |
9ae110e2 JG |
2190 | * Ask the session daemon for all available events of a session channel. |
2191 | * Sets the contents of the events array. | |
2192 | * Returns the number of lttng_event entries in events; | |
2193 | * on error, returns a negative value. | |
9f19cc17 | 2194 | */ |
cd80958d DG |
2195 | int lttng_list_events(struct lttng_handle *handle, |
2196 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2197 | { |
2198 | int ret; | |
e368fb43 JG |
2199 | struct lttcomm_session_msg lsm = {}; |
2200 | const struct lttcomm_event_command_header *cmd_header = NULL; | |
b4e3ceb9 | 2201 | uint32_t nb_events, i; |
e368fb43 | 2202 | const void *comm_ext_at; |
56f0bc67 | 2203 | struct lttng_dynamic_buffer listing; |
de453daa | 2204 | size_t storage_req; |
e368fb43 JG |
2205 | struct lttng_payload payload; |
2206 | struct lttng_payload payload_copy; | |
2207 | struct lttng_payload_view lsm_view = | |
2208 | lttng_payload_view_init_from_buffer( | |
2209 | (const char *) &lsm, 0, sizeof(lsm)); | |
2210 | struct lttng_buffer_view cmd_header_view; | |
2211 | struct lttng_buffer_view cmd_payload_view; | |
2212 | struct lttng_buffer_view flat_events_view; | |
2213 | struct lttng_buffer_view ext_view; | |
9f19cc17 | 2214 | |
9d697d3d DG |
2215 | /* Safety check. An handle and channel name are mandatory */ |
2216 | if (handle == NULL || channel_name == NULL) { | |
e368fb43 JG |
2217 | ret = -LTTNG_ERR_INVALID; |
2218 | goto end; | |
cd80958d DG |
2219 | } |
2220 | ||
e368fb43 JG |
2221 | lttng_payload_init(&payload); |
2222 | lttng_payload_init(&payload_copy); | |
2223 | ||
cd80958d | 2224 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 2225 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2226 | sizeof(lsm.session.name)); |
cac3069d | 2227 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 2228 | sizeof(lsm.u.list.channel_name)); |
60160d2a | 2229 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2230 | |
e368fb43 | 2231 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &payload); |
9f19cc17 | 2232 | if (ret < 0) { |
de453daa | 2233 | goto end; |
9f19cc17 DG |
2234 | } |
2235 | ||
e368fb43 JG |
2236 | /* |
2237 | * A copy of the payload is performed since it will be | |
2238 | * consumed twice. Consuming the same payload twice is invalid since | |
2239 | * it will cause any received file descriptor to become "shared" | |
2240 | * between different instances of the resulting objects. | |
2241 | */ | |
2242 | ret = lttng_payload_copy(&payload, &payload_copy); | |
2243 | if (ret) { | |
2244 | ret = -LTTNG_ERR_NOMEM; | |
2245 | goto end; | |
2246 | } | |
2247 | ||
2248 | cmd_header_view = lttng_buffer_view_from_dynamic_buffer( | |
2249 | &payload.buffer, 0, sizeof(*cmd_header)); | |
3e6e0df2 | 2250 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { |
e368fb43 | 2251 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
d9f484bc JG |
2252 | goto end; |
2253 | } | |
2254 | ||
e368fb43 JG |
2255 | cmd_header = (typeof(cmd_header)) cmd_header_view.data; |
2256 | ||
b4e3ceb9 PP |
2257 | /* Set number of events and free command header */ |
2258 | nb_events = cmd_header->nb_events; | |
2259 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2260 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2261 | goto end; |
b4e3ceb9 | 2262 | } |
e368fb43 JG |
2263 | |
2264 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( | |
2265 | &payload.buffer, sizeof(*cmd_header), -1); | |
b4e3ceb9 | 2266 | |
de453daa JG |
2267 | /* |
2268 | * The buffer that is returned must contain a "flat" version of | |
2269 | * the events that are returned. In other words, all pointers | |
2270 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2271 | * buffer so that the user may free everything by simply calling free() |
2272 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2273 | * compatibility. |
2274 | * | |
56f0bc67 JG |
2275 | * A first pass is performed to compute the size of the buffer that |
2276 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2277 | * the returned events so that their members always point within the |
2278 | * buffer. | |
2279 | * | |
2280 | * The layout of the returned buffer is as follows: | |
2281 | * - struct lttng_event[nb_events], | |
2282 | * - nb_events times the following: | |
2283 | * - struct lttng_event_extended, | |
2284 | * - flattened version of userspace_probe_location | |
2285 | * - filter_expression | |
2286 | * - exclusions | |
2287 | * - padding to align to 64-bits | |
2288 | */ | |
e368fb43 JG |
2289 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2290 | nb_events * sizeof(struct lttng_event), -1); | |
2291 | comm_ext_at = ext_view.data; | |
de453daa | 2292 | storage_req = nb_events * sizeof(struct lttng_event); |
e368fb43 JG |
2293 | { |
2294 | struct lttng_payload_view payload_view = | |
2295 | lttng_payload_view_from_payload(&payload, 0, -1); | |
b4e3ceb9 | 2296 | |
e368fb43 JG |
2297 | for (i = 0; i < nb_events; i++) { |
2298 | const struct lttcomm_event_extended_header *ext_comm = | |
2299 | (struct lttcomm_event_extended_header *) | |
2300 | comm_ext_at; | |
2301 | int probe_storage_req = 0; | |
b4e3ceb9 | 2302 | |
e368fb43 JG |
2303 | comm_ext_at += sizeof(*ext_comm); |
2304 | comm_ext_at += ext_comm->filter_len; | |
2305 | comm_ext_at += ext_comm->nb_exclusions * | |
2306 | LTTNG_SYMBOL_NAME_LEN; | |
2307 | ||
2308 | if (ext_comm->userspace_probe_location_len) { | |
2309 | struct lttng_userspace_probe_location | |
2310 | *probe_location = NULL; | |
2311 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2312 | &payload_view, | |
2313 | (const char *) comm_ext_at - | |
2314 | payload_view.buffer.data, | |
2315 | ext_comm->userspace_probe_location_len); | |
56f0bc67 | 2316 | |
3e6e0df2 JG |
2317 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2318 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2319 | goto end; | |
2320 | } | |
2321 | ||
e368fb43 JG |
2322 | /* |
2323 | * Create a temporary userspace probe location | |
2324 | * to determine the size needed by a "flattened" | |
2325 | * version of that same probe location. | |
2326 | */ | |
2327 | ret = lttng_userspace_probe_location_create_from_payload( | |
2328 | &probe_location_view, | |
2329 | &probe_location); | |
2330 | if (ret < 0) { | |
2331 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2332 | goto end; | |
2333 | } | |
56f0bc67 | 2334 | |
e368fb43 JG |
2335 | ret = lttng_userspace_probe_location_flatten( |
2336 | probe_location, NULL); | |
2337 | lttng_userspace_probe_location_destroy( | |
2338 | probe_location); | |
2339 | if (ret < 0) { | |
2340 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2341 | goto end; | |
2342 | } | |
56f0bc67 | 2343 | |
e368fb43 JG |
2344 | probe_storage_req = ret; |
2345 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2346 | } |
2347 | ||
e368fb43 JG |
2348 | storage_req += sizeof(struct lttng_event_extended); |
2349 | storage_req += ext_comm->filter_len; | |
2350 | storage_req += ext_comm->nb_exclusions * | |
2351 | LTTNG_SYMBOL_NAME_LEN; | |
2352 | /* Padding to ensure the flat probe is aligned. */ | |
2353 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2354 | storage_req += probe_storage_req; | |
56f0bc67 | 2355 | } |
b4e3ceb9 PP |
2356 | } |
2357 | ||
56f0bc67 JG |
2358 | lttng_dynamic_buffer_init(&listing); |
2359 | /* | |
2360 | * We must ensure that "listing" is never resized so as to preserve | |
2361 | * the validity of the flattened objects. | |
2362 | */ | |
2363 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2364 | if (ret) { | |
2365 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2366 | goto end; |
2367 | } | |
56f0bc67 | 2368 | |
e368fb43 JG |
2369 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( |
2370 | &payload_copy.buffer, sizeof(*cmd_header), -1); | |
2371 | flat_events_view = lttng_buffer_view_from_view(&cmd_payload_view, 0, | |
56f0bc67 | 2372 | nb_events * sizeof(struct lttng_event)); |
e368fb43 | 2373 | ret = lttng_dynamic_buffer_append_view(&listing, &flat_events_view); |
56f0bc67 JG |
2374 | if (ret) { |
2375 | ret = -LTTNG_ERR_NOMEM; | |
2376 | goto free_dynamic_buffer; | |
2377 | } | |
de453daa | 2378 | |
e368fb43 JG |
2379 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2380 | nb_events * sizeof(struct lttng_event), -1); | |
2381 | comm_ext_at = ext_view.data; | |
2382 | ||
2383 | { | |
2384 | struct lttng_payload_view payload_copy_view = | |
2385 | lttng_payload_view_from_payload( | |
2386 | &payload_copy, 0, -1); | |
2387 | ||
2388 | for (i = 0; i < nb_events; i++) { | |
2389 | struct lttng_event *event = (typeof(event))( | |
2390 | listing.data + | |
2391 | (sizeof(struct lttng_event) * i)); | |
2392 | const struct lttcomm_event_extended_header *ext_comm = | |
2393 | (typeof(ext_comm)) comm_ext_at; | |
2394 | struct lttng_event_extended *event_extended = | |
2395 | (typeof(event_extended))(listing.data + | |
2396 | listing.size); | |
2397 | ||
2398 | /* Insert struct lttng_event_extended. */ | |
2399 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2400 | listing.size + sizeof(*event_extended)); | |
56f0bc67 JG |
2401 | if (ret) { |
2402 | ret = -LTTNG_ERR_NOMEM; | |
2403 | goto free_dynamic_buffer; | |
2404 | } | |
e368fb43 JG |
2405 | event->extended.ptr = event_extended; |
2406 | ||
2407 | comm_ext_at += sizeof(*ext_comm); | |
2408 | ||
2409 | /* Insert filter expression. */ | |
2410 | if (ext_comm->filter_len) { | |
2411 | event_extended->filter_expression = | |
2412 | listing.data + listing.size; | |
2413 | ret = lttng_dynamic_buffer_append(&listing, | |
2414 | comm_ext_at, | |
2415 | ext_comm->filter_len); | |
2416 | if (ret) { | |
2417 | ret = -LTTNG_ERR_NOMEM; | |
2418 | goto free_dynamic_buffer; | |
2419 | } | |
2420 | comm_ext_at += ext_comm->filter_len; | |
2421 | } | |
56f0bc67 | 2422 | |
e368fb43 JG |
2423 | /* Insert exclusions. */ |
2424 | if (ext_comm->nb_exclusions) { | |
2425 | event_extended->exclusions.count = | |
2426 | ext_comm->nb_exclusions; | |
2427 | event_extended->exclusions.strings = | |
2428 | listing.data + listing.size; | |
2429 | ||
2430 | ret = lttng_dynamic_buffer_append(&listing, | |
2431 | comm_ext_at, | |
2432 | ext_comm->nb_exclusions * | |
2433 | LTTNG_SYMBOL_NAME_LEN); | |
2434 | if (ret) { | |
2435 | ret = -LTTNG_ERR_NOMEM; | |
2436 | goto free_dynamic_buffer; | |
2437 | } | |
2438 | comm_ext_at += ext_comm->nb_exclusions * | |
2439 | LTTNG_SYMBOL_NAME_LEN; | |
2440 | } | |
56f0bc67 | 2441 | |
e368fb43 JG |
2442 | /* Insert padding to align to 64-bits. */ |
2443 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2444 | ALIGN_TO(listing.size, | |
2445 | sizeof(uint64_t))); | |
56f0bc67 JG |
2446 | if (ret) { |
2447 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2448 | goto free_dynamic_buffer; |
56f0bc67 | 2449 | } |
56f0bc67 | 2450 | |
e368fb43 JG |
2451 | /* Insert flattened userspace probe location. */ |
2452 | if (ext_comm->userspace_probe_location_len) { | |
2453 | struct lttng_userspace_probe_location | |
2454 | *probe_location = NULL; | |
2455 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2456 | &payload_copy_view, | |
2457 | (const char *) comm_ext_at - | |
2458 | payload_copy_view.buffer.data, | |
2459 | ext_comm->userspace_probe_location_len); | |
2460 | ||
3e6e0df2 JG |
2461 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2462 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2463 | goto free_dynamic_buffer; | |
2464 | } | |
2465 | ||
e368fb43 JG |
2466 | ret = lttng_userspace_probe_location_create_from_payload( |
2467 | &probe_location_view, | |
2468 | &probe_location); | |
2469 | if (ret < 0) { | |
2470 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2471 | goto free_dynamic_buffer; | |
2472 | } | |
de453daa | 2473 | |
e368fb43 JG |
2474 | event_extended->probe_location = (struct lttng_userspace_probe_location |
2475 | *) (listing.data + | |
2476 | listing.size); | |
2477 | ret = lttng_userspace_probe_location_flatten( | |
2478 | probe_location, &listing); | |
2479 | lttng_userspace_probe_location_destroy( | |
2480 | probe_location); | |
2481 | if (ret < 0) { | |
2482 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2483 | goto free_dynamic_buffer; | |
2484 | } | |
56f0bc67 | 2485 | |
e368fb43 | 2486 | comm_ext_at += ext_comm->userspace_probe_location_len; |
56f0bc67 | 2487 | } |
56f0bc67 | 2488 | } |
de453daa JG |
2489 | } |
2490 | ||
56f0bc67 JG |
2491 | /* Don't reset listing buffer as we return its content. */ |
2492 | *events = (struct lttng_event *) listing.data; | |
2493 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2494 | ret = (int) nb_events; |
56f0bc67 JG |
2495 | free_dynamic_buffer: |
2496 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2497 | end: |
e368fb43 JG |
2498 | lttng_payload_reset(&payload); |
2499 | lttng_payload_reset(&payload_copy); | |
b4e3ceb9 | 2500 | return ret; |
9f19cc17 DG |
2501 | } |
2502 | ||
fac6795d | 2503 | /* |
1c8d13c8 TD |
2504 | * Sets the tracing_group variable with name. |
2505 | * This function allocates memory pointed to by tracing_group. | |
2506 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2507 | */ |
2508 | int lttng_set_tracing_group(const char *name) | |
2509 | { | |
9d697d3d | 2510 | if (name == NULL) { |
2f70b271 | 2511 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2512 | } |
2513 | ||
fac6795d | 2514 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2515 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2516 | } |
2517 | ||
2518 | return 0; | |
2519 | } | |
2520 | ||
cd80958d | 2521 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2522 | struct lttng_calibrate *calibrate) |
2523 | { | |
b812e5ca PP |
2524 | /* |
2525 | * This command was removed in LTTng 2.9. | |
2526 | */ | |
2527 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2528 | } |
2529 | ||
5edd7e09 DG |
2530 | /* |
2531 | * Set default channel attributes. | |
441c16a7 | 2532 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2533 | */ |
2534 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2535 | struct lttng_channel_attr *attr) | |
2536 | { | |
294851b0 | 2537 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2538 | |
5edd7e09 DG |
2539 | /* Safety check */ |
2540 | if (attr == NULL || domain == NULL) { | |
2541 | return; | |
2542 | } | |
2543 | ||
294851b0 | 2544 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2545 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2546 | ||
0a9c6494 DG |
2547 | /* Same for all domains. */ |
2548 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2549 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2550 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2551 | ||
5edd7e09 DG |
2552 | switch (domain->type) { |
2553 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2554 | attr->switch_timer_interval = |
2555 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2556 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2557 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2558 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2559 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2560 | if (extended) { |
2561 | extended->monitor_timer_interval = | |
2562 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2563 | extended->blocking_timeout = |
2564 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2565 | } |
5edd7e09 DG |
2566 | break; |
2567 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2568 | switch (domain->buf_type) { |
2569 | case LTTNG_BUFFER_PER_UID: | |
2570 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2571 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2572 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2573 | attr->switch_timer_interval = |
2574 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2575 | attr->read_timer_interval = | |
2576 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2577 | if (extended) { |
2578 | extended->monitor_timer_interval = | |
2579 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2580 | extended->blocking_timeout = |
2581 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2582 | } |
0a9c6494 DG |
2583 | break; |
2584 | case LTTNG_BUFFER_PER_PID: | |
2585 | default: | |
2586 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2587 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2588 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2589 | attr->switch_timer_interval = |
2590 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2591 | attr->read_timer_interval = | |
2592 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2593 | if (extended) { |
2594 | extended->monitor_timer_interval = | |
2595 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2596 | extended->blocking_timeout = |
2597 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2598 | } |
0a9c6494 DG |
2599 | break; |
2600 | } | |
5edd7e09 | 2601 | default: |
441c16a7 | 2602 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2603 | break; |
2604 | } | |
cf0bcb51 JG |
2605 | |
2606 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2607 | } |
2608 | ||
5ba3702f JG |
2609 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2610 | uint64_t *discarded_events) | |
2611 | { | |
2612 | int ret = 0; | |
cf0bcb51 | 2613 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2614 | |
2615 | if (!channel || !discarded_events) { | |
2616 | ret = -LTTNG_ERR_INVALID; | |
2617 | goto end; | |
2618 | } | |
2619 | ||
2620 | chan_ext = channel->attr.extended.ptr; | |
2621 | if (!chan_ext) { | |
2622 | /* | |
2623 | * This can happen since the lttng_channel structure is | |
2624 | * used for other tasks where this pointer is never set. | |
2625 | */ | |
2626 | *discarded_events = 0; | |
2627 | goto end; | |
2628 | } | |
2629 | ||
2630 | *discarded_events = chan_ext->discarded_events; | |
2631 | end: | |
2632 | return ret; | |
2633 | } | |
2634 | ||
2635 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2636 | uint64_t *lost_packets) | |
2637 | { | |
2638 | int ret = 0; | |
cf0bcb51 | 2639 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2640 | |
2641 | if (!channel || !lost_packets) { | |
2642 | ret = -LTTNG_ERR_INVALID; | |
2643 | goto end; | |
2644 | } | |
2645 | ||
2646 | chan_ext = channel->attr.extended.ptr; | |
2647 | if (!chan_ext) { | |
2648 | /* | |
2649 | * This can happen since the lttng_channel structure is | |
2650 | * used for other tasks where this pointer is never set. | |
2651 | */ | |
2652 | *lost_packets = 0; | |
2653 | goto end; | |
2654 | } | |
2655 | ||
2656 | *lost_packets = chan_ext->lost_packets; | |
2657 | end: | |
2658 | return ret; | |
2659 | } | |
2660 | ||
cf0bcb51 JG |
2661 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2662 | uint64_t *monitor_timer_interval) | |
2663 | { | |
2664 | int ret = 0; | |
2665 | ||
2666 | if (!chan || !monitor_timer_interval) { | |
2667 | ret = -LTTNG_ERR_INVALID; | |
2668 | goto end; | |
2669 | } | |
2670 | ||
2671 | if (!chan->attr.extended.ptr) { | |
2672 | ret = -LTTNG_ERR_INVALID; | |
2673 | goto end; | |
2674 | } | |
2675 | ||
2676 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2677 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2678 | end: | |
2679 | return ret; | |
2680 | } | |
2681 | ||
2682 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2683 | uint64_t monitor_timer_interval) | |
2684 | { | |
2685 | int ret = 0; | |
2686 | ||
2687 | if (!chan || !chan->attr.extended.ptr) { | |
2688 | ret = -LTTNG_ERR_INVALID; | |
2689 | goto end; | |
2690 | } | |
2691 | ||
2692 | ((struct lttng_channel_extended *) | |
2693 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2694 | monitor_timer_interval; | |
2695 | end: | |
2696 | return ret; | |
2697 | } | |
2698 | ||
491d1539 MD |
2699 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2700 | int64_t *blocking_timeout) | |
2701 | { | |
2702 | int ret = 0; | |
2703 | ||
2704 | if (!chan || !blocking_timeout) { | |
2705 | ret = -LTTNG_ERR_INVALID; | |
2706 | goto end; | |
2707 | } | |
2708 | ||
2709 | if (!chan->attr.extended.ptr) { | |
2710 | ret = -LTTNG_ERR_INVALID; | |
2711 | goto end; | |
2712 | } | |
2713 | ||
2714 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2715 | chan->attr.extended.ptr)->blocking_timeout; | |
2716 | end: | |
2717 | return ret; | |
2718 | } | |
2719 | ||
2720 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2721 | int64_t blocking_timeout) | |
2722 | { | |
2723 | int ret = 0; | |
2724 | int64_t msec_timeout; | |
2725 | ||
2726 | if (!chan || !chan->attr.extended.ptr) { | |
2727 | ret = -LTTNG_ERR_INVALID; | |
2728 | goto end; | |
2729 | } | |
2730 | ||
2731 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2732 | ret = -LTTNG_ERR_INVALID; | |
2733 | goto end; | |
2734 | } | |
2735 | ||
2736 | /* | |
2737 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2738 | * us to accept a narrower range of values (msecs expressed as a signed | |
2739 | * 32-bit integer). | |
2740 | */ | |
2741 | msec_timeout = blocking_timeout / 1000; | |
2742 | if (msec_timeout != (int32_t) msec_timeout) { | |
2743 | ret = -LTTNG_ERR_INVALID; | |
2744 | goto end; | |
2745 | } | |
2746 | ||
2747 | ((struct lttng_channel_extended *) | |
2748 | chan->attr.extended.ptr)->blocking_timeout = | |
2749 | blocking_timeout; | |
2750 | end: | |
2751 | return ret; | |
2752 | } | |
2753 | ||
fac6795d | 2754 | /* |
2269e89e | 2755 | * Check if session daemon is alive. |
fac6795d | 2756 | * |
2269e89e | 2757 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2758 | * On error returns a negative value. |
fac6795d | 2759 | */ |
947308c4 | 2760 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2761 | { |
2762 | int ret; | |
2763 | ||
2764 | ret = set_session_daemon_path(); | |
2765 | if (ret < 0) { | |
9ae110e2 | 2766 | /* Error. */ |
fac6795d DG |
2767 | return ret; |
2768 | } | |
2769 | ||
9d035200 | 2770 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2771 | /* |
9ae110e2 JG |
2772 | * No socket path set. Weird error which means the constructor |
2773 | * was not called. | |
2f70b271 DG |
2774 | */ |
2775 | assert(0); | |
fac6795d DG |
2776 | } |
2777 | ||
2269e89e | 2778 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2779 | if (ret < 0) { |
9ae110e2 | 2780 | /* Not alive. */ |
7d8234d9 MD |
2781 | return 0; |
2782 | } | |
7d8234d9 | 2783 | |
9ae110e2 | 2784 | /* Is alive. */ |
947308c4 | 2785 | return 1; |
fac6795d DG |
2786 | } |
2787 | ||
00e2e675 | 2788 | /* |
a4b92340 | 2789 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2790 | * |
2791 | * Return 0 on success, else a negative value. | |
2792 | */ | |
a4b92340 DG |
2793 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2794 | const char *control_url, const char *data_url) | |
00e2e675 | 2795 | { |
3dd05a85 | 2796 | int ret; |
a4b92340 | 2797 | ssize_t size; |
00e2e675 | 2798 | struct lttcomm_session_msg lsm; |
a4b92340 | 2799 | struct lttng_uri *uris = NULL; |
00e2e675 | 2800 | |
a4b92340 | 2801 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2802 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2803 | } |
2804 | ||
a4b92340 DG |
2805 | memset(&lsm, 0, sizeof(lsm)); |
2806 | ||
00e2e675 DG |
2807 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2808 | ||
cac3069d | 2809 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2810 | sizeof(lsm.session.name)); |
60160d2a | 2811 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2812 | |
bc894455 | 2813 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2814 | if (size < 0) { |
2f70b271 | 2815 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2816 | } |
2817 | ||
2818 | lsm.u.uri.size = size; | |
00e2e675 | 2819 | |
795a978d | 2820 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2821 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2822 | |
2823 | free(uris); | |
2824 | return ret; | |
00e2e675 DG |
2825 | } |
2826 | ||
2827 | /* | |
9c6bda17 | 2828 | * [OBSOLETE] |
00e2e675 | 2829 | */ |
2ec40111 | 2830 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2831 | int lttng_enable_consumer(struct lttng_handle *handle) |
2832 | { | |
785d2d0d | 2833 | return -ENOSYS; |
00e2e675 DG |
2834 | } |
2835 | ||
2836 | /* | |
9c6bda17 | 2837 | * [OBSOLETE] |
00e2e675 | 2838 | */ |
2ec40111 | 2839 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2840 | int lttng_disable_consumer(struct lttng_handle *handle) |
2841 | { | |
785d2d0d | 2842 | return -ENOSYS; |
00e2e675 DG |
2843 | } |
2844 | ||
07424f16 | 2845 | /* |
b178f53e | 2846 | * [OBSOLETE] |
07424f16 | 2847 | */ |
2ec40111 SM |
2848 | int _lttng_create_session_ext(const char *name, const char *url, |
2849 | const char *datetime); | |
07424f16 DG |
2850 | int _lttng_create_session_ext(const char *name, const char *url, |
2851 | const char *datetime) | |
2852 | { | |
b178f53e | 2853 | return -ENOSYS; |
07424f16 DG |
2854 | } |
2855 | ||
806e2684 DG |
2856 | /* |
2857 | * For a given session name, this call checks if the data is ready to be read | |
2858 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2859 | * any readers. | |
2860 | */ | |
6d805429 | 2861 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2862 | { |
2863 | int ret; | |
2864 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2865 | uint8_t *pending = NULL; |
806e2684 DG |
2866 | |
2867 | if (session_name == NULL) { | |
2868 | return -LTTNG_ERR_INVALID; | |
2869 | } | |
2870 | ||
53efb85a | 2871 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2872 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2873 | |
cac3069d DG |
2874 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2875 | sizeof(lsm.session.name)); | |
806e2684 | 2876 | |
f6151c55 JG |
2877 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2878 | if (ret < 0) { | |
2879 | goto end; | |
2880 | } else if (ret != 1) { | |
2881 | /* Unexpected payload size */ | |
2882 | ret = -LTTNG_ERR_INVALID; | |
2883 | goto end; | |
e848d36d JG |
2884 | } else if (!pending) { |
2885 | /* Internal error. */ | |
2886 | ret = -LTTNG_ERR_UNK; | |
2887 | goto end; | |
806e2684 DG |
2888 | } |
2889 | ||
f6151c55 JG |
2890 | ret = (int) *pending; |
2891 | end: | |
2892 | free(pending); | |
806e2684 DG |
2893 | return ret; |
2894 | } | |
2895 | ||
93ec662e JD |
2896 | /* |
2897 | * Regenerate the metadata for a session. | |
2898 | * Return 0 on success, a negative error code on error. | |
2899 | */ | |
eded6438 | 2900 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2901 | { |
2902 | int ret; | |
2903 | struct lttcomm_session_msg lsm; | |
2904 | ||
2905 | if (!session_name) { | |
2906 | ret = -LTTNG_ERR_INVALID; | |
2907 | goto end; | |
2908 | } | |
2909 | ||
2910 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2911 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2912 | |
2913 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2914 | sizeof(lsm.session.name)); | |
2915 | ||
2916 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2917 | if (ret < 0) { | |
2918 | goto end; | |
2919 | } | |
2920 | ||
2921 | ret = 0; | |
2922 | end: | |
2923 | return ret; | |
2924 | } | |
2925 | ||
eded6438 JD |
2926 | /* |
2927 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2928 | */ | |
2929 | int lttng_metadata_regenerate(const char *session_name) | |
2930 | { | |
2931 | return lttng_regenerate_metadata(session_name); | |
2932 | } | |
2933 | ||
c2561365 JD |
2934 | /* |
2935 | * Regenerate the statedump of a session. | |
2936 | * Return 0 on success, a negative error code on error. | |
2937 | */ | |
2938 | int lttng_regenerate_statedump(const char *session_name) | |
2939 | { | |
2940 | int ret; | |
2941 | struct lttcomm_session_msg lsm; | |
2942 | ||
2943 | if (!session_name) { | |
2944 | ret = -LTTNG_ERR_INVALID; | |
2945 | goto end; | |
2946 | } | |
2947 | ||
2948 | memset(&lsm, 0, sizeof(lsm)); | |
2949 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2950 | ||
2951 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2952 | sizeof(lsm.session.name)); | |
2953 | ||
2954 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2955 | if (ret < 0) { | |
2956 | goto end; | |
2957 | } | |
2958 | ||
2959 | ret = 0; | |
2960 | end: | |
2961 | return ret; | |
2962 | } | |
2963 | ||
a58c490f JG |
2964 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2965 | { | |
2966 | int ret; | |
99608320 JR |
2967 | struct lttcomm_session_msg lsm = { |
2968 | .cmd_type = LTTNG_REGISTER_TRIGGER, | |
2969 | }; | |
2970 | struct lttcomm_session_msg *message_lsm; | |
2971 | struct lttng_payload message; | |
2972 | struct lttng_payload reply; | |
242388e4 | 2973 | struct lttng_trigger *reply_trigger = NULL; |
64eafdf6 JR |
2974 | const struct lttng_credentials user_creds = { |
2975 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
2976 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
2977 | }; | |
99608320 | 2978 | |
242388e4 | 2979 | |
99608320 JR |
2980 | lttng_payload_init(&message); |
2981 | lttng_payload_init(&reply); | |
a58c490f JG |
2982 | |
2983 | if (!trigger) { | |
2984 | ret = -LTTNG_ERR_INVALID; | |
2985 | goto end; | |
2986 | } | |
2987 | ||
64eafdf6 JR |
2988 | if (!trigger->creds.uid.is_set) { |
2989 | /* Use the client's credentials as the trigger credentials. */ | |
2990 | lttng_trigger_set_credentials(trigger, &user_creds); | |
2991 | } else { | |
2992 | /* | |
2993 | * Validate that either the current trigger credentials and the | |
2994 | * client credentials are identical or that the current user is | |
2995 | * root. The root user can register, unregister triggers for | |
2996 | * himself and other users. | |
2997 | * | |
2998 | * This check is also present on the sessiond side, using the | |
2999 | * credentials passed on the socket. These check are all | |
3000 | * "safety" checks. | |
3001 | */ | |
3002 | const struct lttng_credentials *trigger_creds = | |
3003 | lttng_trigger_get_credentials(trigger); | |
3004 | ||
3005 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3006 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3007 | ret = -LTTNG_ERR_EPERM; | |
3008 | goto end; | |
3009 | } | |
3010 | } | |
3011 | } | |
3012 | ||
a58c490f | 3013 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3014 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3015 | goto end; |
3016 | } | |
3017 | ||
97285430 JG |
3018 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3019 | if (ret) { | |
3020 | ret = -LTTNG_ERR_NOMEM; | |
3021 | goto end; | |
3022 | } | |
99608320 JR |
3023 | |
3024 | /* | |
3025 | * This is needed to populate the trigger object size for the command | |
3026 | * header. | |
3027 | */ | |
3028 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3029 | ||
3030 | ret = lttng_trigger_serialize(trigger, &message); | |
3647288f | 3031 | if (ret < 0) { |
a58c490f JG |
3032 | ret = -LTTNG_ERR_UNK; |
3033 | goto end; | |
3034 | } | |
3035 | ||
99608320 JR |
3036 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3037 | ||
3038 | { | |
3039 | struct lttng_payload_view message_view = | |
3040 | lttng_payload_view_from_payload( | |
3041 | &message, 0, -1); | |
3042 | ||
3043 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3044 | &message_view); | |
3045 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3046 | if (ret < 0) { | |
3047 | goto end; | |
3048 | } | |
3049 | } | |
3050 | ||
242388e4 JR |
3051 | { |
3052 | struct lttng_payload_view reply_view = | |
3053 | lttng_payload_view_from_payload( | |
3054 | &reply, 0, reply.buffer.size); | |
3055 | ||
3056 | ret = lttng_trigger_create_from_payload( | |
3057 | &reply_view, &reply_trigger); | |
3058 | if (ret < 0) { | |
3059 | ret = -LTTNG_ERR_FATAL; | |
3060 | goto end; | |
3061 | } | |
3062 | } | |
3063 | ||
3064 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3065 | if (ret < 0) { | |
3066 | ret = -LTTNG_ERR_FATAL; | |
3067 | goto end; | |
3068 | } | |
3069 | ||
99608320 | 3070 | ret = 0; |
a58c490f | 3071 | end: |
99608320 JR |
3072 | lttng_payload_reset(&message); |
3073 | lttng_payload_reset(&reply); | |
242388e4 | 3074 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3075 | return ret; |
3076 | } | |
3077 | ||
3078 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
3079 | { | |
3080 | int ret; | |
3081 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3082 | struct lttcomm_session_msg *message_lsm; |
3083 | struct lttng_payload message; | |
3084 | struct lttng_payload reply; | |
64eafdf6 JR |
3085 | const struct lttng_credentials user_creds = { |
3086 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3087 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3088 | }; | |
99608320 JR |
3089 | |
3090 | lttng_payload_init(&message); | |
3091 | lttng_payload_init(&reply); | |
a58c490f JG |
3092 | |
3093 | if (!trigger) { | |
3094 | ret = -LTTNG_ERR_INVALID; | |
3095 | goto end; | |
3096 | } | |
3097 | ||
64eafdf6 JR |
3098 | if (!trigger->creds.uid.is_set) { |
3099 | /* Use the client's credentials as the trigger credentials. */ | |
3100 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3101 | } else { | |
3102 | /* | |
3103 | * Validate that either the current trigger credentials and the | |
3104 | * client credentials are identical or that the current user is | |
3105 | * root. The root user can register, unregister triggers for | |
3106 | * himself and other users. | |
3107 | * | |
3108 | * This check is also present on the sessiond side, using the | |
3109 | * credentials passed on the socket. These check are all | |
3110 | * "safety" checks. | |
3111 | */ | |
3112 | const struct lttng_credentials *trigger_creds = | |
3113 | lttng_trigger_get_credentials(trigger); | |
3114 | ||
3115 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3116 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3117 | ret = -LTTNG_ERR_EPERM; | |
3118 | goto end; | |
3119 | } | |
3120 | } | |
3121 | } | |
3122 | ||
a58c490f | 3123 | if (!lttng_trigger_validate(trigger)) { |
3647288f | 3124 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3125 | goto end; |
3126 | } | |
3127 | ||
99608320 JR |
3128 | memset(&lsm, 0, sizeof(lsm)); |
3129 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3130 | ||
97285430 JG |
3131 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3132 | if (ret) { | |
3133 | ret = -LTTNG_ERR_NOMEM; | |
3134 | goto end; | |
3135 | } | |
99608320 JR |
3136 | |
3137 | /* | |
3138 | * This is needed to populate the trigger object size for the command | |
3139 | * header and number of fds sent. | |
3140 | */ | |
3141 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3142 | ||
3143 | ret = lttng_trigger_serialize(trigger, &message); | |
3647288f | 3144 | if (ret < 0) { |
a58c490f JG |
3145 | ret = -LTTNG_ERR_UNK; |
3146 | goto end; | |
3147 | } | |
3148 | ||
99608320 JR |
3149 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3150 | ||
3151 | { | |
3152 | struct lttng_payload_view message_view = | |
3153 | lttng_payload_view_from_payload( | |
3154 | &message, 0, -1); | |
3155 | ||
3156 | /* | |
3157 | * Update the message header with the number of fd that will be | |
3158 | * sent. | |
3159 | */ | |
3160 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3161 | &message_view); | |
3162 | ||
3163 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3164 | if (ret < 0) { | |
3165 | goto end; | |
3166 | } | |
3167 | } | |
3168 | ||
3169 | ret = 0; | |
a58c490f | 3170 | end: |
99608320 JR |
3171 | lttng_payload_reset(&message); |
3172 | lttng_payload_reset(&reply); | |
a58c490f JG |
3173 | return ret; |
3174 | } | |
3175 | ||
fbc9f37d JR |
3176 | /* |
3177 | * Ask the session daemon for all registered triggers for the current user. | |
3178 | * | |
3179 | * Allocates and return an lttng_triggers set. | |
3180 | * On error, returns a suitable lttng_error_code. | |
3181 | */ | |
3182 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3183 | { | |
3184 | int ret; | |
3185 | enum lttng_error_code ret_code = LTTNG_OK; | |
3186 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS }; | |
3187 | struct lttng_triggers *local_triggers = NULL; | |
3188 | struct lttng_payload reply; | |
3189 | struct lttng_payload_view lsm_view = | |
3190 | lttng_payload_view_init_from_buffer( | |
3191 | (const char *) &lsm, 0, sizeof(lsm)); | |
3192 | ||
3193 | lttng_payload_init(&reply); | |
3194 | ||
3195 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3196 | if (ret < 0) { | |
3197 | ret_code = (enum lttng_error_code) -ret; | |
3198 | goto end; | |
3199 | } | |
3200 | ||
3201 | { | |
3202 | struct lttng_payload_view reply_view = | |
3203 | lttng_payload_view_from_payload( | |
3204 | &reply, 0, reply.buffer.size); | |
3205 | ||
3206 | ret = lttng_triggers_create_from_payload( | |
3207 | &reply_view, &local_triggers); | |
3208 | if (ret < 0) { | |
3209 | ret_code = LTTNG_ERR_FATAL; | |
3210 | goto end; | |
3211 | } | |
3212 | } | |
3213 | ||
3214 | *triggers = local_triggers; | |
3215 | local_triggers = NULL; | |
3216 | end: | |
3217 | lttng_payload_reset(&reply); | |
3218 | lttng_triggers_destroy(local_triggers); | |
3219 | return ret_code; | |
3220 | } | |
3221 | ||
fac6795d | 3222 | /* |
9ae110e2 | 3223 | * lib constructor. |
fac6795d | 3224 | */ |
b2b89e8a | 3225 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3226 | { |
3227 | /* Set default session group */ | |
bbccc3d2 | 3228 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3229 | } |
49cca668 DG |
3230 | |
3231 | /* | |
9ae110e2 | 3232 | * lib destructor. |
49cca668 | 3233 | */ |
b2b89e8a | 3234 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3235 | { |
3236 | free(tracing_group); | |
3237 | } |