Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
82a3637f DG |
2 | * liblttngctl.c |
3 | * | |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
fac6795d | 7 | * |
d14d33bf AM |
8 | * This library is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
10 | * as published by the Free Software Foundation. | |
82a3637f DG |
11 | * |
12 | * This library is distributed in the hope that it will be useful, | |
fac6795d | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
82a3637f DG |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. | |
16 | * | |
d14d33bf AM |
17 | * You should have received a copy of the GNU Lesser General Public License |
18 | * along with this library; if not, write to the Free Software Foundation, | |
19 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
fac6795d DG |
20 | */ |
21 | ||
22 | #define _GNU_SOURCE | |
44a5e5eb | 23 | #include <assert.h> |
fac6795d | 24 | #include <grp.h> |
1e307fab | 25 | #include <errno.h> |
fac6795d DG |
26 | #include <stdio.h> |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | ||
990570ed DG |
31 | #include <common/common.h> |
32 | #include <common/defaults.h> | |
db758600 | 33 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 34 | #include <common/uri.h> |
feb0f3e5 | 35 | #include <common/utils.h> |
1e307fab | 36 | #include <lttng/lttng.h> |
0c89d795 | 37 | #include <lttng/health-internal.h> |
fac6795d | 38 | |
d00c599e DG |
39 | #include "filter/filter-ast.h" |
40 | #include "filter/filter-parser.h" | |
41 | #include "filter/filter-bytecode.h" | |
42 | #include "filter/memstream.h" | |
cac3069d | 43 | #include "lttng-ctl-helper.h" |
53a80697 MD |
44 | |
45 | #ifdef DEBUG | |
d00c599e | 46 | static const int print_xml = 1; |
53a80697 MD |
47 | #define dbg_printf(fmt, args...) \ |
48 | printf("[debug liblttng-ctl] " fmt, ## args) | |
49 | #else | |
d00c599e | 50 | static const int print_xml = 0; |
53a80697 MD |
51 | #define dbg_printf(fmt, args...) \ |
52 | do { \ | |
53 | /* do nothing but check printf format */ \ | |
54 | if (0) \ | |
55 | printf("[debug liblttnctl] " fmt, ## args); \ | |
56 | } while (0) | |
57 | #endif | |
58 | ||
59 | ||
fac6795d DG |
60 | /* Socket to session daemon for communication */ |
61 | static int sessiond_socket; | |
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 | */ | |
152 | static int send_session_varlen(void *data, size_t len) | |
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 | ||
e065084a | 175 | /* |
cd80958d | 176 | * Receive data from the sessiond socket. |
e065084a | 177 | * |
1c8d13c8 TD |
178 | * On success, returns the number of bytes received (>=0) |
179 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 180 | */ |
ca95a216 | 181 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
182 | { |
183 | int ret; | |
184 | ||
185 | if (!connected) { | |
2f70b271 | 186 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 187 | goto end; |
fac6795d DG |
188 | } |
189 | ||
ca95a216 | 190 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
191 | if (ret < 0) { |
192 | ret = -LTTNG_ERR_FATAL; | |
193 | } | |
fac6795d | 194 | |
e065084a | 195 | end: |
fac6795d DG |
196 | return ret; |
197 | } | |
198 | ||
199 | /* | |
1c8d13c8 | 200 | * Check if we are in the specified group. |
65beb5ff | 201 | * |
2269e89e | 202 | * If yes return 1, else return -1. |
947308c4 | 203 | */ |
6c71277b MD |
204 | LTTNG_HIDDEN |
205 | int lttng_check_tracing_group(void) | |
947308c4 DG |
206 | { |
207 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
208 | gid_t *grp_list; | |
209 | int grp_list_size, grp_id, i; | |
210 | int ret = -1; | |
6c71277b | 211 | const char *grp_name = tracing_group; |
947308c4 DG |
212 | |
213 | /* Get GID of group 'tracing' */ | |
214 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
215 | if (!grp_tracing) { |
216 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
217 | goto end; |
218 | } | |
219 | ||
220 | /* Get number of supplementary group IDs */ | |
221 | grp_list_size = getgroups(0, NULL); | |
222 | if (grp_list_size < 0) { | |
223 | perror("getgroups"); | |
224 | goto end; | |
225 | } | |
226 | ||
227 | /* Alloc group list of the right size */ | |
228 | grp_list = malloc(grp_list_size * sizeof(gid_t)); | |
00795392 | 229 | if (!grp_list) { |
1c8d13c8 | 230 | perror("malloc"); |
00795392 MD |
231 | goto end; |
232 | } | |
947308c4 | 233 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 234 | if (grp_id < 0) { |
947308c4 DG |
235 | perror("getgroups"); |
236 | goto free_list; | |
237 | } | |
238 | ||
239 | for (i = 0; i < grp_list_size; i++) { | |
240 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 241 | ret = 1; |
947308c4 DG |
242 | break; |
243 | } | |
244 | } | |
245 | ||
246 | free_list: | |
247 | free(grp_list); | |
248 | ||
249 | end: | |
250 | return ret; | |
251 | } | |
252 | ||
253 | /* | |
2269e89e DG |
254 | * Try connect to session daemon with sock_path. |
255 | * | |
256 | * Return 0 on success, else -1 | |
257 | */ | |
258 | static int try_connect_sessiond(const char *sock_path) | |
259 | { | |
260 | int ret; | |
261 | ||
262 | /* If socket exist, we check if the daemon listens for connect. */ | |
263 | ret = access(sock_path, F_OK); | |
264 | if (ret < 0) { | |
265 | /* Not alive */ | |
2f70b271 | 266 | goto error; |
2269e89e DG |
267 | } |
268 | ||
269 | ret = lttcomm_connect_unix_sock(sock_path); | |
270 | if (ret < 0) { | |
271 | /* Not alive */ | |
2f70b271 | 272 | goto error; |
2269e89e DG |
273 | } |
274 | ||
275 | ret = lttcomm_close_unix_sock(ret); | |
276 | if (ret < 0) { | |
277 | perror("lttcomm_close_unix_sock"); | |
278 | } | |
279 | ||
280 | return 0; | |
2f70b271 DG |
281 | |
282 | error: | |
283 | return -1; | |
2269e89e DG |
284 | } |
285 | ||
286 | /* | |
2f70b271 DG |
287 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
288 | * variable. | |
289 | * | |
290 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
291 | * is somehow too long or ENOMEM). | |
947308c4 DG |
292 | */ |
293 | static int set_session_daemon_path(void) | |
294 | { | |
2269e89e DG |
295 | int in_tgroup = 0; /* In tracing group */ |
296 | uid_t uid; | |
297 | ||
298 | uid = getuid(); | |
947308c4 | 299 | |
2269e89e DG |
300 | if (uid != 0) { |
301 | /* Are we in the tracing group ? */ | |
6c71277b | 302 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
303 | } |
304 | ||
08a9c49f | 305 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
306 | lttng_ctl_copy_string(sessiond_sock_path, |
307 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 308 | } |
2269e89e | 309 | |
08a9c49f | 310 | if (uid != 0) { |
c617c0c6 MD |
311 | int ret; |
312 | ||
08a9c49f TD |
313 | if (in_tgroup) { |
314 | /* Tracing group */ | |
315 | ret = try_connect_sessiond(sessiond_sock_path); | |
316 | if (ret >= 0) { | |
317 | goto end; | |
2269e89e | 318 | } |
08a9c49f | 319 | /* Global session daemon not available... */ |
2269e89e | 320 | } |
08a9c49f TD |
321 | /* ...or not in tracing group (and not root), default */ |
322 | ||
323 | /* | |
324 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
325 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
326 | */ | |
327 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 328 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 329 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 330 | goto error; |
947308c4 | 331 | } |
947308c4 | 332 | } |
08a9c49f | 333 | end: |
947308c4 | 334 | return 0; |
2f70b271 DG |
335 | |
336 | error: | |
337 | return -1; | |
947308c4 DG |
338 | } |
339 | ||
65beb5ff DG |
340 | /* |
341 | * Connect to the LTTng session daemon. | |
342 | * | |
343 | * On success, return 0. On error, return -1. | |
344 | */ | |
345 | static int connect_sessiond(void) | |
346 | { | |
347 | int ret; | |
348 | ||
da3c9ec1 DG |
349 | /* Don't try to connect if already connected. */ |
350 | if (connected) { | |
351 | return 0; | |
352 | } | |
353 | ||
65beb5ff DG |
354 | ret = set_session_daemon_path(); |
355 | if (ret < 0) { | |
2f70b271 | 356 | goto error; |
65beb5ff DG |
357 | } |
358 | ||
359 | /* Connect to the sesssion daemon */ | |
360 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); | |
361 | if (ret < 0) { | |
2f70b271 | 362 | goto error; |
65beb5ff DG |
363 | } |
364 | ||
365 | sessiond_socket = ret; | |
366 | connected = 1; | |
367 | ||
368 | return 0; | |
2f70b271 DG |
369 | |
370 | error: | |
371 | return -1; | |
65beb5ff DG |
372 | } |
373 | ||
374 | /* | |
1c8d13c8 TD |
375 | * Clean disconnect from the session daemon. |
376 | * On success, return 0. On error, return -1. | |
65beb5ff DG |
377 | */ |
378 | static int disconnect_sessiond(void) | |
379 | { | |
380 | int ret = 0; | |
381 | ||
382 | if (connected) { | |
383 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
384 | sessiond_socket = 0; | |
385 | connected = 0; | |
386 | } | |
387 | ||
388 | return ret; | |
389 | } | |
390 | ||
35a6fdb7 | 391 | /* |
cd80958d | 392 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 393 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 394 | * |
af87c45a | 395 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 396 | */ |
cac3069d DG |
397 | LTTNG_HIDDEN |
398 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
a4b92340 | 399 | void *vardata, size_t varlen, void **buf) |
65beb5ff DG |
400 | { |
401 | int ret; | |
402 | size_t size; | |
403 | void *data = NULL; | |
cd80958d | 404 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
405 | |
406 | ret = connect_sessiond(); | |
407 | if (ret < 0) { | |
2f70b271 | 408 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
409 | goto end; |
410 | } | |
411 | ||
65beb5ff | 412 | /* Send command to session daemon */ |
cd80958d | 413 | ret = send_session_msg(lsm); |
65beb5ff | 414 | if (ret < 0) { |
2f70b271 | 415 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
416 | goto end; |
417 | } | |
53a80697 MD |
418 | /* Send var len data */ |
419 | ret = send_session_varlen(vardata, varlen); | |
420 | if (ret < 0) { | |
2f70b271 | 421 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
422 | goto end; |
423 | } | |
65beb5ff DG |
424 | |
425 | /* Get header from data transmission */ | |
426 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
427 | if (ret < 0) { | |
2f70b271 | 428 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
429 | goto end; |
430 | } | |
431 | ||
432 | /* Check error code if OK */ | |
f73fabfd | 433 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
434 | ret = -llm.ret_code; |
435 | goto end; | |
436 | } | |
437 | ||
438 | size = llm.data_size; | |
439 | if (size == 0) { | |
874d3f84 | 440 | /* If client free with size 0 */ |
a45d5536 DG |
441 | if (buf != NULL) { |
442 | *buf = NULL; | |
443 | } | |
7d29a247 | 444 | ret = 0; |
65beb5ff DG |
445 | goto end; |
446 | } | |
447 | ||
448 | data = (void*) malloc(size); | |
449 | ||
450 | /* Get payload data */ | |
451 | ret = recv_data_sessiond(data, size); | |
452 | if (ret < 0) { | |
453 | free(data); | |
454 | goto end; | |
455 | } | |
456 | ||
83009e5e DG |
457 | /* |
458 | * Extra protection not to dereference a NULL pointer. If buf is NULL at | |
459 | * this point, an error is returned and data is freed. | |
460 | */ | |
461 | if (buf == NULL) { | |
2f70b271 | 462 | ret = -LTTNG_ERR_INVALID; |
83009e5e DG |
463 | free(data); |
464 | goto end; | |
465 | } | |
466 | ||
65beb5ff DG |
467 | *buf = data; |
468 | ret = size; | |
469 | ||
470 | end: | |
471 | disconnect_sessiond(); | |
472 | return ret; | |
473 | } | |
474 | ||
9f19cc17 | 475 | /* |
cd80958d | 476 | * Create lttng handle and return pointer. |
1c8d13c8 | 477 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 478 | */ |
cd80958d DG |
479 | struct lttng_handle *lttng_create_handle(const char *session_name, |
480 | struct lttng_domain *domain) | |
9f19cc17 | 481 | { |
2f70b271 DG |
482 | struct lttng_handle *handle = NULL; |
483 | ||
484 | if (domain == NULL) { | |
485 | goto end; | |
486 | } | |
cd80958d DG |
487 | |
488 | handle = malloc(sizeof(struct lttng_handle)); | |
489 | if (handle == NULL) { | |
2f70b271 | 490 | PERROR("malloc handle"); |
cd80958d DG |
491 | goto end; |
492 | } | |
493 | ||
494 | /* Copy session name */ | |
cac3069d | 495 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
496 | sizeof(handle->session_name)); |
497 | ||
498 | /* Copy lttng domain */ | |
cac3069d | 499 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); |
cd80958d DG |
500 | |
501 | end: | |
502 | return handle; | |
503 | } | |
504 | ||
505 | /* | |
506 | * Destroy handle by free(3) the pointer. | |
507 | */ | |
508 | void lttng_destroy_handle(struct lttng_handle *handle) | |
509 | { | |
0e428499 | 510 | free(handle); |
eb354453 DG |
511 | } |
512 | ||
d9800920 DG |
513 | /* |
514 | * Register an outside consumer. | |
1c8d13c8 | 515 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
516 | */ |
517 | int lttng_register_consumer(struct lttng_handle *handle, | |
518 | const char *socket_path) | |
519 | { | |
520 | struct lttcomm_session_msg lsm; | |
521 | ||
2f70b271 DG |
522 | if (handle == NULL || socket_path == NULL) { |
523 | return -LTTNG_ERR_INVALID; | |
524 | } | |
525 | ||
53efb85a | 526 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 527 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 528 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 529 | sizeof(lsm.session.name)); |
cac3069d | 530 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 531 | |
cac3069d | 532 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
d9800920 | 533 | |
cac3069d | 534 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
535 | } |
536 | ||
1df4dedd | 537 | /* |
1c8d13c8 TD |
538 | * Start tracing for all traces of the session. |
539 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 540 | */ |
6a4f824d | 541 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 542 | { |
cd80958d DG |
543 | struct lttcomm_session_msg lsm; |
544 | ||
6a4f824d | 545 | if (session_name == NULL) { |
2f70b271 | 546 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
547 | } |
548 | ||
53efb85a | 549 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 550 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 551 | |
cac3069d DG |
552 | lttng_ctl_copy_string(lsm.session.name, session_name, |
553 | sizeof(lsm.session.name)); | |
cd80958d | 554 | |
cac3069d | 555 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 556 | } |
1df4dedd DG |
557 | |
558 | /* | |
38ee087f | 559 | * Stop tracing for all traces of the session. |
f3ed775e | 560 | */ |
38ee087f | 561 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 562 | { |
38ee087f | 563 | int ret, data_ret; |
cd80958d DG |
564 | struct lttcomm_session_msg lsm; |
565 | ||
6a4f824d | 566 | if (session_name == NULL) { |
2f70b271 | 567 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
568 | } |
569 | ||
53efb85a | 570 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 571 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 572 | |
cac3069d DG |
573 | lttng_ctl_copy_string(lsm.session.name, session_name, |
574 | sizeof(lsm.session.name)); | |
cd80958d | 575 | |
cac3069d | 576 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
577 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
578 | goto error; | |
579 | } | |
580 | ||
581 | if (!wait) { | |
582 | goto end; | |
583 | } | |
584 | ||
38ee087f DG |
585 | /* Check for data availability */ |
586 | do { | |
6d805429 | 587 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
588 | if (data_ret < 0) { |
589 | /* Return the data available call error. */ | |
590 | ret = data_ret; | |
591 | goto error; | |
592 | } | |
593 | ||
594 | /* | |
595 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
596 | * returned value indicates availability. | |
597 | */ | |
6d805429 | 598 | if (data_ret) { |
38ee087f | 599 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 600 | } |
6d805429 | 601 | } while (data_ret != 0); |
38ee087f | 602 | |
38ee087f DG |
603 | end: |
604 | error: | |
605 | return ret; | |
606 | } | |
607 | ||
608 | /* | |
609 | * Stop tracing and wait for data availability. | |
610 | */ | |
611 | int lttng_stop_tracing(const char *session_name) | |
612 | { | |
613 | return _lttng_stop_tracing(session_name, 1); | |
614 | } | |
615 | ||
616 | /* | |
617 | * Stop tracing but _don't_ wait for data availability. | |
618 | */ | |
619 | int lttng_stop_tracing_no_wait(const char *session_name) | |
620 | { | |
621 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
622 | } |
623 | ||
624 | /* | |
601d5acf DG |
625 | * Add context to a channel. |
626 | * | |
627 | * If the given channel is NULL, add the contexts to all channels. | |
628 | * The event_name param is ignored. | |
af87c45a DG |
629 | * |
630 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 631 | */ |
cd80958d | 632 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
633 | struct lttng_event_context *ctx, const char *event_name, |
634 | const char *channel_name) | |
d65106b1 | 635 | { |
cd80958d DG |
636 | struct lttcomm_session_msg lsm; |
637 | ||
9d697d3d DG |
638 | /* Safety check. Both are mandatory */ |
639 | if (handle == NULL || ctx == NULL) { | |
2f70b271 | 640 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
641 | } |
642 | ||
441c16a7 MD |
643 | memset(&lsm, 0, sizeof(lsm)); |
644 | ||
cd80958d DG |
645 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
646 | ||
85076754 MD |
647 | /* If no channel name, send empty string. */ |
648 | if (channel_name == NULL) { | |
649 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
650 | sizeof(lsm.u.context.channel_name)); | |
651 | } else { | |
652 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
653 | sizeof(lsm.u.context.channel_name)); | |
654 | } | |
cd80958d | 655 | |
cac3069d | 656 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d65106b1 | 657 | |
9d697d3d | 658 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); |
d65106b1 | 659 | |
cac3069d | 660 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
661 | sizeof(lsm.session.name)); |
662 | ||
cac3069d | 663 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d65106b1 DG |
664 | } |
665 | ||
f3ed775e | 666 | /* |
1c8d13c8 TD |
667 | * Enable event(s) for a channel. |
668 | * If no event name is specified, all events are enabled. | |
669 | * If no channel name is specified, the default 'channel0' is used. | |
670 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 671 | */ |
cd80958d | 672 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 673 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 674 | { |
f8a96544 JI |
675 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
676 | NULL, 0, NULL); | |
1df4dedd DG |
677 | } |
678 | ||
53a80697 | 679 | /* |
025faf73 | 680 | * Create or enable an event with a filter expression. |
178191b3 | 681 | * |
53a80697 MD |
682 | * Return negative error value on error. |
683 | * Return size of returned session payload data if OK. | |
684 | */ | |
025faf73 | 685 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 686 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
687 | const char *filter_expression) |
688 | { | |
f8a96544 JI |
689 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
690 | filter_expression, 0, NULL); | |
53a80697 MD |
691 | } |
692 | ||
347c5ab5 | 693 | /* |
0e115563 | 694 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
695 | * NULL if not applicable. |
696 | * | |
697 | * An event with NO loglevel and the name is * will return NULL. | |
698 | */ | |
0e115563 | 699 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
700 | { |
701 | int err; | |
0e115563 | 702 | char *agent_filter = NULL; |
347c5ab5 DG |
703 | |
704 | assert(ev); | |
705 | ||
706 | /* Don't add filter for the '*' event. */ | |
707 | if (ev->name[0] != '*') { | |
708 | if (filter) { | |
0e115563 | 709 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
710 | ev->name); |
711 | } else { | |
0e115563 | 712 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
713 | } |
714 | if (err < 0) { | |
715 | PERROR("asprintf"); | |
6a556f7b | 716 | goto error; |
347c5ab5 DG |
717 | } |
718 | } | |
719 | ||
720 | /* Add loglevel filtering if any for the JUL domain. */ | |
721 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
722 | char *op; | |
723 | ||
724 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
725 | op = ">="; | |
726 | } else { | |
727 | op = "=="; | |
728 | } | |
729 | ||
0e115563 | 730 | if (filter || agent_filter) { |
6a556f7b JG |
731 | char *new_filter; |
732 | ||
fb0edb23 | 733 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 734 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 735 | ev->loglevel); |
0e115563 DG |
736 | if (agent_filter) { |
737 | free(agent_filter); | |
6a556f7b | 738 | } |
0e115563 | 739 | agent_filter = new_filter; |
347c5ab5 | 740 | } else { |
0e115563 | 741 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
742 | ev->loglevel); |
743 | } | |
744 | if (err < 0) { | |
745 | PERROR("asprintf"); | |
6a556f7b | 746 | goto error; |
347c5ab5 DG |
747 | } |
748 | } | |
749 | ||
0e115563 | 750 | return agent_filter; |
6a556f7b | 751 | error: |
0e115563 | 752 | free(agent_filter); |
6a556f7b | 753 | return NULL; |
347c5ab5 DG |
754 | } |
755 | ||
137b9942 DG |
756 | /* |
757 | * Generate the filter bytecode from a give filter expression string. Put the | |
758 | * newly allocated parser context in ctxp and populate the lsm object with the | |
759 | * expression len. | |
760 | * | |
761 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
762 | */ | |
763 | static int generate_filter(char *filter_expression, | |
764 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
765 | { | |
766 | int ret; | |
767 | struct filter_parser_ctx *ctx = NULL; | |
768 | FILE *fmem = NULL; | |
769 | ||
770 | assert(filter_expression); | |
771 | assert(lsm); | |
772 | assert(ctxp); | |
773 | ||
774 | /* | |
775 | * Casting const to non-const, as the underlying function will use it in | |
776 | * read-only mode. | |
777 | */ | |
778 | fmem = lttng_fmemopen((void *) filter_expression, | |
779 | strlen(filter_expression), "r"); | |
780 | if (!fmem) { | |
781 | fprintf(stderr, "Error opening memory as stream\n"); | |
782 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
783 | goto error; | |
784 | } | |
785 | ctx = filter_parser_ctx_alloc(fmem); | |
786 | if (!ctx) { | |
787 | fprintf(stderr, "Error allocating parser\n"); | |
788 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
789 | goto filter_alloc_error; | |
790 | } | |
791 | ret = filter_parser_ctx_append_ast(ctx); | |
792 | if (ret) { | |
793 | fprintf(stderr, "Parse error\n"); | |
794 | ret = -LTTNG_ERR_FILTER_INVAL; | |
795 | goto parse_error; | |
796 | } | |
797 | ret = filter_visitor_set_parent(ctx); | |
798 | if (ret) { | |
799 | fprintf(stderr, "Set parent error\n"); | |
800 | ret = -LTTNG_ERR_FILTER_INVAL; | |
801 | goto parse_error; | |
802 | } | |
803 | if (print_xml) { | |
804 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
805 | if (ret) { | |
806 | fflush(stdout); | |
807 | fprintf(stderr, "XML print error\n"); | |
808 | ret = -LTTNG_ERR_FILTER_INVAL; | |
809 | goto parse_error; | |
810 | } | |
811 | } | |
812 | ||
813 | dbg_printf("Generating IR... "); | |
814 | fflush(stdout); | |
815 | ret = filter_visitor_ir_generate(ctx); | |
816 | if (ret) { | |
817 | fprintf(stderr, "Generate IR error\n"); | |
818 | ret = -LTTNG_ERR_FILTER_INVAL; | |
819 | goto parse_error; | |
820 | } | |
821 | dbg_printf("done\n"); | |
822 | ||
823 | dbg_printf("Validating IR... "); | |
824 | fflush(stdout); | |
825 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
826 | if (ret) { | |
827 | ret = -LTTNG_ERR_FILTER_INVAL; | |
828 | goto parse_error; | |
829 | } | |
dcd5daf2 JG |
830 | /* Validate strings used as literals in the expression */ |
831 | ret = filter_visitor_ir_validate_string(ctx); | |
832 | if (ret) { | |
833 | ret = -LTTNG_ERR_FILTER_INVAL; | |
834 | goto parse_error; | |
835 | } | |
137b9942 DG |
836 | dbg_printf("done\n"); |
837 | ||
838 | dbg_printf("Generating bytecode... "); | |
839 | fflush(stdout); | |
840 | ret = filter_visitor_bytecode_generate(ctx); | |
841 | if (ret) { | |
842 | fprintf(stderr, "Generate bytecode error\n"); | |
843 | ret = -LTTNG_ERR_FILTER_INVAL; | |
844 | goto parse_error; | |
845 | } | |
846 | dbg_printf("done\n"); | |
847 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
848 | bytecode_get_len(&ctx->bytecode->b)); | |
849 | ||
850 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
851 | + bytecode_get_len(&ctx->bytecode->b); | |
852 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
853 | ||
854 | /* No need to keep the memory stream. */ | |
855 | if (fclose(fmem) != 0) { | |
856 | perror("fclose"); | |
857 | } | |
858 | ||
859 | *ctxp = ctx; | |
860 | return 0; | |
861 | ||
862 | parse_error: | |
137b9942 DG |
863 | filter_ir_free(ctx); |
864 | filter_parser_ctx_free(ctx); | |
865 | filter_alloc_error: | |
866 | if (fclose(fmem) != 0) { | |
867 | perror("fclose"); | |
868 | } | |
869 | error: | |
870 | return ret; | |
871 | } | |
872 | ||
93deb080 JI |
873 | /* |
874 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
875 | * If no event name is specified, all events are enabled. | |
876 | * If no channel name is specified, the default name is used. | |
877 | * If filter expression is not NULL, the filter is set for the event. | |
878 | * If exclusion count is not zero, the exclusions are set for the event. | |
879 | * Returns size of returned session payload data or a negative error code. | |
880 | */ | |
881 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
882 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 883 | const char *original_filter_expression, |
93deb080 JI |
884 | int exclusion_count, char **exclusion_list) |
885 | { | |
886 | struct lttcomm_session_msg lsm; | |
64226865 | 887 | char *varlen_data; |
93deb080 | 888 | int ret = 0; |
137b9942 | 889 | unsigned int free_filter_expression = 0; |
93deb080 | 890 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
891 | /* |
892 | * Cast as non-const since we may replace the filter expression | |
893 | * by a dynamically allocated string. Otherwise, the original | |
894 | * string is not modified. | |
895 | */ | |
896 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
897 | |
898 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
899 | ret = -LTTNG_ERR_INVALID; |
900 | goto error; | |
93deb080 JI |
901 | } |
902 | ||
903 | /* Empty filter string will always be rejected by the parser | |
904 | * anyway, so treat this corner-case early to eliminate | |
905 | * lttng_fmemopen error for 0-byte allocation. | |
906 | */ | |
907 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
908 | ret = -LTTNG_ERR_INVALID; |
909 | goto error; | |
93deb080 JI |
910 | } |
911 | ||
912 | memset(&lsm, 0, sizeof(lsm)); | |
913 | ||
914 | /* If no channel name, send empty string. */ | |
915 | if (channel_name == NULL) { | |
916 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
917 | sizeof(lsm.u.enable.channel_name)); | |
918 | } else { | |
919 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
920 | sizeof(lsm.u.enable.channel_name)); | |
921 | } | |
922 | ||
18a720cd MD |
923 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
924 | if (ev->name[0] == '\0') { | |
925 | /* Enable all events */ | |
926 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 927 | } |
93deb080 | 928 | |
6565421f | 929 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 930 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
931 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
932 | ||
933 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
934 | sizeof(lsm.session.name)); | |
935 | lsm.u.enable.exclusion_count = exclusion_count; | |
936 | lsm.u.enable.bytecode_len = 0; | |
937 | ||
9b21e6d5 DG |
938 | /* |
939 | * For the JUL domain, a filter is enforced except for the enable all | |
940 | * event. This is done to avoid having the event in all sessions thus | |
941 | * filtering by logger name. | |
942 | */ | |
943 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 | 944 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
0e115563 DG |
945 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
946 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
3e1c9ff7 | 947 | goto ask_sessiond; |
93deb080 JI |
948 | } |
949 | ||
950 | /* | |
951 | * We have either a filter or some exclusions, so we need to set up | |
952 | * a variable-length memory block from where to send the data | |
953 | */ | |
954 | ||
955 | /* Parse filter expression */ | |
5cdb6027 | 956 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
957 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
958 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 959 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
960 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
961 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
962 | char *agent_filter; | |
64226865 | 963 | |
347c5ab5 | 964 | /* Setup JUL filter if needed. */ |
0e115563 DG |
965 | agent_filter = set_agent_filter(filter_expression, ev); |
966 | if (!agent_filter) { | |
137b9942 DG |
967 | if (!filter_expression) { |
968 | /* No JUL and no filter, just skip everything below. */ | |
969 | goto ask_sessiond; | |
970 | } | |
64226865 DG |
971 | } else { |
972 | /* | |
0e115563 DG |
973 | * With an agent filter, the original filter has been added to |
974 | * it thus replace the filter expression. | |
64226865 | 975 | */ |
0e115563 | 976 | filter_expression = agent_filter; |
e9efbcd3 | 977 | free_filter_expression = 1; |
9b21e6d5 | 978 | } |
9b21e6d5 | 979 | } |
93deb080 | 980 | |
137b9942 | 981 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 982 | if (ret) { |
137b9942 | 983 | goto filter_error; |
93deb080 | 984 | } |
6b453b5e JG |
985 | } |
986 | ||
987 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
988 | + lsm.u.enable.expression_len |
989 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
990 | if (!varlen_data) { |
991 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 992 | goto mem_error; |
6b453b5e | 993 | } |
137b9942 | 994 | |
6b453b5e JG |
995 | /* Put exclusion names first in the data */ |
996 | while (exclusion_count--) { | |
997 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
137b9942 | 998 | *(exclusion_list + exclusion_count), LTTNG_SYMBOL_NAME_LEN); |
6b453b5e JG |
999 | } |
1000 | /* Add filter expression next */ | |
1001 | if (lsm.u.enable.expression_len != 0) { | |
1002 | memcpy(varlen_data | |
1003 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1004 | filter_expression, | |
1005 | lsm.u.enable.expression_len); | |
1006 | } | |
1007 | /* Add filter bytecode next */ | |
137b9942 | 1008 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1009 | memcpy(varlen_data |
1010 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1011 | + lsm.u.enable.expression_len, | |
1012 | &ctx->bytecode->b, | |
1013 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1014 | } |
1015 | ||
1016 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data, | |
67676bd8 | 1017 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
137b9942 | 1018 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, NULL); |
6b453b5e | 1019 | free(varlen_data); |
93deb080 | 1020 | |
7ca1dc6f DG |
1021 | mem_error: |
1022 | if (filter_expression && ctx) { | |
93deb080 JI |
1023 | filter_bytecode_free(ctx); |
1024 | filter_ir_free(ctx); | |
1025 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1026 | } |
1027 | filter_error: | |
1028 | if (free_filter_expression) { | |
1029 | /* | |
1030 | * The filter expression has been replaced and must be freed as it is | |
1031 | * not the original filter expression received as a parameter. | |
1032 | */ | |
1033 | free(filter_expression); | |
93deb080 | 1034 | } |
137b9942 DG |
1035 | error: |
1036 | /* | |
1037 | * Return directly to the caller and don't ask the sessiond since something | |
1038 | * went wrong in the parsing of data above. | |
1039 | */ | |
93deb080 | 1040 | return ret; |
3e1c9ff7 DG |
1041 | |
1042 | ask_sessiond: | |
1043 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1044 | return ret; | |
93deb080 JI |
1045 | } |
1046 | ||
6e911cad MD |
1047 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1048 | struct lttng_event *ev, const char *channel_name, | |
1049 | const char *original_filter_expression) | |
1df4dedd | 1050 | { |
cd80958d | 1051 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1052 | char *varlen_data; |
1053 | int ret = 0; | |
1054 | unsigned int free_filter_expression = 0; | |
1055 | struct filter_parser_ctx *ctx = NULL; | |
1056 | /* | |
1057 | * Cast as non-const since we may replace the filter expression | |
1058 | * by a dynamically allocated string. Otherwise, the original | |
1059 | * string is not modified. | |
1060 | */ | |
1061 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1062 | |
6e911cad MD |
1063 | if (handle == NULL || ev == NULL) { |
1064 | ret = -LTTNG_ERR_INVALID; | |
1065 | goto error; | |
1066 | } | |
1067 | ||
1068 | /* Empty filter string will always be rejected by the parser | |
1069 | * anyway, so treat this corner-case early to eliminate | |
1070 | * lttng_fmemopen error for 0-byte allocation. | |
1071 | */ | |
1072 | if (filter_expression && filter_expression[0] == '\0') { | |
1073 | ret = -LTTNG_ERR_INVALID; | |
1074 | goto error; | |
cd80958d DG |
1075 | } |
1076 | ||
441c16a7 MD |
1077 | memset(&lsm, 0, sizeof(lsm)); |
1078 | ||
85076754 MD |
1079 | /* If no channel name, send empty string. */ |
1080 | if (channel_name == NULL) { | |
1081 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1082 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1083 | } else { |
85076754 | 1084 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1085 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1086 | } |
1087 | ||
18a720cd MD |
1088 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
1089 | if (ev->name[0] == '\0') { | |
1090 | /* Disable all events */ | |
1091 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
f3ed775e DG |
1092 | } |
1093 | ||
6e911cad MD |
1094 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1095 | /* FIXME: copying non-packed struct to packed struct. */ | |
1096 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1097 | ||
cac3069d | 1098 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1099 | sizeof(lsm.session.name)); |
6e911cad | 1100 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1101 | |
6e911cad MD |
1102 | /* |
1103 | * For the JUL domain, a filter is enforced except for the | |
1104 | * disable all event. This is done to avoid having the event in | |
1105 | * all sessions thus filtering by logger name. | |
1106 | */ | |
1107 | if (filter_expression == NULL && | |
1108 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1109 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1110 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1111 | goto ask_sessiond; |
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * We have a filter, so we need to set up a variable-length | |
1116 | * memory block from where to send the data. | |
1117 | */ | |
1118 | ||
1119 | /* Parse filter expression */ | |
1120 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1121 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1122 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1123 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1124 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1125 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1126 | char *agent_filter; | |
6e911cad MD |
1127 | |
1128 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1129 | agent_filter = set_agent_filter(filter_expression, ev); |
1130 | if (!agent_filter) { | |
6e911cad MD |
1131 | if (!filter_expression) { |
1132 | /* No JUL and no filter, just skip everything below. */ | |
1133 | goto ask_sessiond; | |
1134 | } | |
1135 | } else { | |
1136 | /* | |
1137 | * With a JUL filter, the original filter has been added to it | |
1138 | * thus replace the filter expression. | |
1139 | */ | |
0e115563 | 1140 | filter_expression = agent_filter; |
6e911cad MD |
1141 | free_filter_expression = 1; |
1142 | } | |
1143 | } | |
1144 | ||
1145 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1146 | if (ret) { | |
1147 | goto filter_error; | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1152 | + lsm.u.disable.expression_len); | |
1153 | if (!varlen_data) { | |
1154 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1155 | goto mem_error; | |
1156 | } | |
1157 | ||
1158 | /* Add filter expression */ | |
1159 | if (lsm.u.disable.expression_len != 0) { | |
1160 | memcpy(varlen_data, | |
1161 | filter_expression, | |
1162 | lsm.u.disable.expression_len); | |
1163 | } | |
1164 | /* Add filter bytecode next */ | |
1165 | if (ctx && lsm.u.disable.bytecode_len != 0) { | |
1166 | memcpy(varlen_data | |
1167 | + lsm.u.disable.expression_len, | |
1168 | &ctx->bytecode->b, | |
1169 | lsm.u.disable.bytecode_len); | |
1170 | } | |
1171 | ||
1172 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data, | |
1173 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); | |
1174 | free(varlen_data); | |
1175 | ||
1176 | mem_error: | |
1177 | if (filter_expression && ctx) { | |
1178 | filter_bytecode_free(ctx); | |
1179 | filter_ir_free(ctx); | |
1180 | filter_parser_ctx_free(ctx); | |
1181 | } | |
1182 | filter_error: | |
1183 | if (free_filter_expression) { | |
1184 | /* | |
1185 | * The filter expression has been replaced and must be freed as it is | |
1186 | * not the original filter expression received as a parameter. | |
1187 | */ | |
1188 | free(filter_expression); | |
1189 | } | |
1190 | error: | |
1191 | /* | |
1192 | * Return directly to the caller and don't ask the sessiond since something | |
1193 | * went wrong in the parsing of data above. | |
1194 | */ | |
1195 | return ret; | |
1196 | ||
1197 | ask_sessiond: | |
1198 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1199 | return ret; | |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * Disable event(s) of a channel and domain. | |
1204 | * If no event name is specified, all events are disabled. | |
1205 | * If no channel name is specified, the default 'channel0' is used. | |
1206 | * Returns size of returned session payload data or a negative error code. | |
1207 | */ | |
1208 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1209 | const char *channel_name) | |
1210 | { | |
1211 | struct lttng_event ev; | |
1212 | ||
1213 | memset(&ev, 0, sizeof(ev)); | |
1214 | ev.type = LTTNG_EVENT_ALL; | |
1215 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1216 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1217 | } |
1218 | ||
1219 | /* | |
1c8d13c8 TD |
1220 | * Enable channel per domain |
1221 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1222 | */ |
cd80958d | 1223 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 1224 | struct lttng_channel *chan) |
a5c5a2bd | 1225 | { |
cd80958d DG |
1226 | struct lttcomm_session_msg lsm; |
1227 | ||
5117eeec DG |
1228 | /* |
1229 | * NULL arguments are forbidden. No default values. | |
1230 | */ | |
1231 | if (handle == NULL || chan == NULL) { | |
2f70b271 | 1232 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1233 | } |
1234 | ||
441c16a7 MD |
1235 | memset(&lsm, 0, sizeof(lsm)); |
1236 | ||
5117eeec | 1237 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 1238 | |
cd80958d DG |
1239 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
1240 | ||
cac3069d | 1241 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1242 | |
cac3069d | 1243 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1244 | sizeof(lsm.session.name)); |
1245 | ||
cac3069d | 1246 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1247 | } |
1df4dedd | 1248 | |
2ef84c95 | 1249 | /* |
1c8d13c8 TD |
1250 | * All tracing will be stopped for registered events of the channel. |
1251 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1252 | */ |
cd80958d | 1253 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1254 | { |
cd80958d DG |
1255 | struct lttcomm_session_msg lsm; |
1256 | ||
9d697d3d DG |
1257 | /* Safety check. Both are mandatory */ |
1258 | if (handle == NULL || name == NULL) { | |
2f70b271 | 1259 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1260 | } |
1261 | ||
441c16a7 MD |
1262 | memset(&lsm, 0, sizeof(lsm)); |
1263 | ||
cd80958d | 1264 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1265 | |
cac3069d | 1266 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1267 | sizeof(lsm.u.disable.channel_name)); |
1268 | ||
cac3069d | 1269 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1270 | |
cac3069d | 1271 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1272 | sizeof(lsm.session.name)); |
1273 | ||
cac3069d | 1274 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1275 | } |
1276 | ||
fac6795d | 1277 | /* |
1c8d13c8 TD |
1278 | * Lists all available tracepoints of domain. |
1279 | * Sets the contents of the events array. | |
1280 | * Returns the number of lttng_event entries in events; | |
1281 | * on error, returns a negative value. | |
fac6795d | 1282 | */ |
cd80958d | 1283 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1284 | struct lttng_event **events) |
fac6795d | 1285 | { |
052da939 | 1286 | int ret; |
cd80958d DG |
1287 | struct lttcomm_session_msg lsm; |
1288 | ||
9d697d3d | 1289 | if (handle == NULL) { |
2f70b271 | 1290 | return -LTTNG_ERR_INVALID; |
cd80958d | 1291 | } |
fac6795d | 1292 | |
53efb85a | 1293 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1294 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1295 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1296 | |
cac3069d | 1297 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1298 | if (ret < 0) { |
1299 | return ret; | |
eb354453 | 1300 | } |
fac6795d | 1301 | |
9f19cc17 | 1302 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1303 | } |
1304 | ||
f37d259d MD |
1305 | /* |
1306 | * Lists all available tracepoint fields of domain. | |
1307 | * Sets the contents of the event field array. | |
1308 | * Returns the number of lttng_event_field entries in events; | |
1309 | * on error, returns a negative value. | |
1310 | */ | |
1311 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1312 | struct lttng_event_field **fields) | |
1313 | { | |
1314 | int ret; | |
1315 | struct lttcomm_session_msg lsm; | |
1316 | ||
1317 | if (handle == NULL) { | |
2f70b271 | 1318 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1319 | } |
1320 | ||
53efb85a | 1321 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1322 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1323 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1324 | |
cac3069d | 1325 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1326 | if (ret < 0) { |
1327 | return ret; | |
1328 | } | |
1329 | ||
1330 | return ret / sizeof(struct lttng_event_field); | |
1331 | } | |
1332 | ||
834978fd DG |
1333 | /* |
1334 | * Lists all available kernel system calls. Allocates and sets the contents of | |
1335 | * the events array. | |
1336 | * | |
1337 | * Returns the number of lttng_event entries in events; on error, returns a | |
1338 | * negative value. | |
1339 | */ | |
1340 | int lttng_list_syscalls(struct lttng_event **events) | |
1341 | { | |
1342 | int ret; | |
1343 | struct lttcomm_session_msg lsm; | |
1344 | ||
1345 | if (!events) { | |
1346 | return -LTTNG_ERR_INVALID; | |
1347 | } | |
1348 | ||
1349 | memset(&lsm, 0, sizeof(lsm)); | |
1350 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1351 | /* Force kernel domain for system calls. */ | |
1352 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1353 | ||
1354 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1355 | if (ret < 0) { | |
1356 | return ret; | |
1357 | } | |
1358 | ||
1359 | return ret / sizeof(struct lttng_event); | |
1360 | } | |
1361 | ||
1657e9bb | 1362 | /* |
1c8d13c8 TD |
1363 | * Returns a human readable string describing |
1364 | * the error code (a negative value). | |
1657e9bb | 1365 | */ |
9a745bc7 | 1366 | const char *lttng_strerror(int code) |
1657e9bb | 1367 | { |
f73fabfd | 1368 | return error_get_str(code); |
1657e9bb DG |
1369 | } |
1370 | ||
aaf97519 | 1371 | /* |
a4b92340 DG |
1372 | * Create a brand new session using name and url for destination. |
1373 | * | |
f73fabfd | 1374 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1375 | */ |
a4b92340 | 1376 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1377 | { |
3dd05a85 | 1378 | int ret; |
a4b92340 | 1379 | ssize_t size; |
00e2e675 | 1380 | struct lttcomm_session_msg lsm; |
a4b92340 | 1381 | struct lttng_uri *uris = NULL; |
00e2e675 | 1382 | |
a4b92340 | 1383 | if (name == NULL) { |
2f70b271 | 1384 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1385 | } |
1386 | ||
a4b92340 | 1387 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1388 | |
a4b92340 | 1389 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1390 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1391 | |
1392 | /* There should never be a data URL */ | |
bc894455 | 1393 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1394 | if (size < 0) { |
2f70b271 | 1395 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1396 | } |
1397 | ||
a4b92340 DG |
1398 | lsm.u.uri.size = size; |
1399 | ||
cac3069d DG |
1400 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1401 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1402 | |
1403 | free(uris); | |
1404 | return ret; | |
00e2e675 DG |
1405 | } |
1406 | ||
8028d920 | 1407 | /* |
8028d920 | 1408 | * Destroy session using name. |
1c8d13c8 | 1409 | * Returns size of returned session payload data or a negative error code. |
8028d920 | 1410 | */ |
843f5df9 | 1411 | int lttng_destroy_session(const char *session_name) |
8028d920 | 1412 | { |
cd80958d DG |
1413 | struct lttcomm_session_msg lsm; |
1414 | ||
843f5df9 | 1415 | if (session_name == NULL) { |
2f70b271 | 1416 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1417 | } |
1418 | ||
53efb85a | 1419 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1420 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1421 | |
cac3069d DG |
1422 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1423 | sizeof(lsm.session.name)); | |
cd80958d | 1424 | |
cac3069d | 1425 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1426 | } |
1427 | ||
57167058 | 1428 | /* |
57167058 | 1429 | * Ask the session daemon for all available sessions. |
1c8d13c8 TD |
1430 | * Sets the contents of the sessions array. |
1431 | * Returns the number of lttng_session entries in sessions; | |
1432 | * on error, returns a negative value. | |
57167058 | 1433 | */ |
ca95a216 | 1434 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1435 | { |
ca95a216 | 1436 | int ret; |
cd80958d | 1437 | struct lttcomm_session_msg lsm; |
57167058 | 1438 | |
53efb85a | 1439 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1440 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1441 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1442 | if (ret < 0) { |
ca95a216 | 1443 | return ret; |
57167058 DG |
1444 | } |
1445 | ||
ca95a216 | 1446 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1447 | } |
1448 | ||
9f19cc17 | 1449 | /* |
1c8d13c8 TD |
1450 | * Ask the session daemon for all available domains of a session. |
1451 | * Sets the contents of the domains array. | |
1452 | * Returns the number of lttng_domain entries in domains; | |
1453 | * on error, returns a negative value. | |
9f19cc17 | 1454 | */ |
330be774 | 1455 | int lttng_list_domains(const char *session_name, |
cd80958d | 1456 | struct lttng_domain **domains) |
9f19cc17 DG |
1457 | { |
1458 | int ret; | |
cd80958d DG |
1459 | struct lttcomm_session_msg lsm; |
1460 | ||
330be774 | 1461 | if (session_name == NULL) { |
2f70b271 | 1462 | return -LTTNG_ERR_INVALID; |
cd80958d | 1463 | } |
9f19cc17 | 1464 | |
53efb85a | 1465 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1466 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1467 | ||
cac3069d DG |
1468 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1469 | sizeof(lsm.session.name)); | |
cd80958d | 1470 | |
cac3069d | 1471 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1472 | if (ret < 0) { |
1473 | return ret; | |
1474 | } | |
1475 | ||
1476 | return ret / sizeof(struct lttng_domain); | |
1477 | } | |
1478 | ||
1479 | /* | |
1c8d13c8 TD |
1480 | * Ask the session daemon for all available channels of a session. |
1481 | * Sets the contents of the channels array. | |
1482 | * Returns the number of lttng_channel entries in channels; | |
1483 | * on error, returns a negative value. | |
9f19cc17 | 1484 | */ |
cd80958d DG |
1485 | int lttng_list_channels(struct lttng_handle *handle, |
1486 | struct lttng_channel **channels) | |
9f19cc17 DG |
1487 | { |
1488 | int ret; | |
cd80958d DG |
1489 | struct lttcomm_session_msg lsm; |
1490 | ||
9d697d3d | 1491 | if (handle == NULL) { |
2f70b271 | 1492 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1493 | } |
1494 | ||
53efb85a | 1495 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1496 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1497 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1498 | sizeof(lsm.session.name)); |
9f19cc17 | 1499 | |
cac3069d | 1500 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1501 | |
cac3069d | 1502 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1503 | if (ret < 0) { |
1504 | return ret; | |
1505 | } | |
1506 | ||
1507 | return ret / sizeof(struct lttng_channel); | |
1508 | } | |
1509 | ||
1510 | /* | |
1c8d13c8 TD |
1511 | * Ask the session daemon for all available events of a session channel. |
1512 | * Sets the contents of the events array. | |
1513 | * Returns the number of lttng_event entries in events; | |
1514 | * on error, returns a negative value. | |
9f19cc17 | 1515 | */ |
cd80958d DG |
1516 | int lttng_list_events(struct lttng_handle *handle, |
1517 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1518 | { |
1519 | int ret; | |
cd80958d | 1520 | struct lttcomm_session_msg lsm; |
9f19cc17 | 1521 | |
9d697d3d DG |
1522 | /* Safety check. An handle and channel name are mandatory */ |
1523 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1524 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1525 | } |
1526 | ||
53efb85a | 1527 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1528 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1529 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1530 | sizeof(lsm.session.name)); |
cac3069d | 1531 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d DG |
1532 | sizeof(lsm.u.list.channel_name)); |
1533 | ||
cac3069d | 1534 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1535 | |
cac3069d | 1536 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) events); |
9f19cc17 DG |
1537 | if (ret < 0) { |
1538 | return ret; | |
1539 | } | |
1540 | ||
1541 | return ret / sizeof(struct lttng_event); | |
1542 | } | |
1543 | ||
fac6795d | 1544 | /* |
1c8d13c8 TD |
1545 | * Sets the tracing_group variable with name. |
1546 | * This function allocates memory pointed to by tracing_group. | |
1547 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1548 | */ |
1549 | int lttng_set_tracing_group(const char *name) | |
1550 | { | |
9d697d3d | 1551 | if (name == NULL) { |
2f70b271 | 1552 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1553 | } |
1554 | ||
fac6795d | 1555 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1556 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1557 | } |
1558 | ||
1559 | return 0; | |
1560 | } | |
1561 | ||
d0254c7c | 1562 | /* |
af87c45a | 1563 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1564 | */ |
cd80958d | 1565 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1566 | struct lttng_calibrate *calibrate) |
1567 | { | |
cd80958d | 1568 | struct lttcomm_session_msg lsm; |
d0254c7c | 1569 | |
9d697d3d DG |
1570 | /* Safety check. NULL pointer are forbidden */ |
1571 | if (handle == NULL || calibrate == NULL) { | |
2f70b271 | 1572 | return -LTTNG_ERR_INVALID; |
cd80958d | 1573 | } |
d0254c7c | 1574 | |
53efb85a | 1575 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1576 | lsm.cmd_type = LTTNG_CALIBRATE; |
cac3069d | 1577 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d0254c7c | 1578 | |
cd80958d DG |
1579 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1580 | ||
cac3069d | 1581 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d0254c7c MD |
1582 | } |
1583 | ||
5edd7e09 DG |
1584 | /* |
1585 | * Set default channel attributes. | |
441c16a7 | 1586 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1587 | */ |
1588 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1589 | struct lttng_channel_attr *attr) | |
1590 | { | |
1591 | /* Safety check */ | |
1592 | if (attr == NULL || domain == NULL) { | |
1593 | return; | |
1594 | } | |
1595 | ||
eacaa7a6 DS |
1596 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1597 | ||
0a9c6494 DG |
1598 | /* Same for all domains. */ |
1599 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1600 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1601 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1602 | ||
5edd7e09 DG |
1603 | switch (domain->type) { |
1604 | case LTTNG_DOMAIN_KERNEL: | |
d92ff3ef DG |
1605 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
1606 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
3e230f92 | 1607 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1608 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1609 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1610 | break; | |
1611 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1612 | switch (domain->buf_type) { |
1613 | case LTTNG_BUFFER_PER_UID: | |
1614 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1615 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1616 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
1617 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1618 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
1619 | break; | |
1620 | case LTTNG_BUFFER_PER_PID: | |
1621 | default: | |
1622 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1623 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1624 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
1625 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1626 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
1627 | break; | |
1628 | } | |
5edd7e09 | 1629 | default: |
441c16a7 | 1630 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1631 | break; |
1632 | } | |
1633 | } | |
1634 | ||
fac6795d | 1635 | /* |
2269e89e | 1636 | * Check if session daemon is alive. |
fac6795d | 1637 | * |
2269e89e | 1638 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1639 | * On error returns a negative value. |
fac6795d | 1640 | */ |
947308c4 | 1641 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1642 | { |
1643 | int ret; | |
1644 | ||
1645 | ret = set_session_daemon_path(); | |
1646 | if (ret < 0) { | |
947308c4 | 1647 | /* Error */ |
fac6795d DG |
1648 | return ret; |
1649 | } | |
1650 | ||
9d035200 | 1651 | if (*sessiond_sock_path == '\0') { |
2f70b271 DG |
1652 | /* |
1653 | * No socket path set. Weird error which means the constructor was not | |
1654 | * called. | |
1655 | */ | |
1656 | assert(0); | |
fac6795d DG |
1657 | } |
1658 | ||
2269e89e | 1659 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 MD |
1660 | if (ret < 0) { |
1661 | /* Not alive */ | |
1662 | return 0; | |
1663 | } | |
7d8234d9 | 1664 | |
947308c4 DG |
1665 | /* Is alive */ |
1666 | return 1; | |
fac6795d DG |
1667 | } |
1668 | ||
00e2e675 | 1669 | /* |
a4b92340 | 1670 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
1671 | * |
1672 | * Return 0 on success, else a negative value. | |
1673 | */ | |
a4b92340 DG |
1674 | int lttng_set_consumer_url(struct lttng_handle *handle, |
1675 | const char *control_url, const char *data_url) | |
00e2e675 | 1676 | { |
3dd05a85 | 1677 | int ret; |
a4b92340 | 1678 | ssize_t size; |
00e2e675 | 1679 | struct lttcomm_session_msg lsm; |
a4b92340 | 1680 | struct lttng_uri *uris = NULL; |
00e2e675 | 1681 | |
a4b92340 | 1682 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 1683 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1684 | } |
1685 | ||
a4b92340 DG |
1686 | memset(&lsm, 0, sizeof(lsm)); |
1687 | ||
00e2e675 DG |
1688 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
1689 | ||
cac3069d | 1690 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 1691 | sizeof(lsm.session.name)); |
cac3069d | 1692 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 1693 | |
bc894455 | 1694 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 1695 | if (size < 0) { |
2f70b271 | 1696 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
1697 | } |
1698 | ||
1699 | lsm.u.uri.size = size; | |
00e2e675 | 1700 | |
cac3069d DG |
1701 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1702 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1703 | |
1704 | free(uris); | |
1705 | return ret; | |
00e2e675 DG |
1706 | } |
1707 | ||
1708 | /* | |
9c6bda17 | 1709 | * [OBSOLETE] |
00e2e675 DG |
1710 | */ |
1711 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1712 | { | |
785d2d0d | 1713 | return -ENOSYS; |
00e2e675 DG |
1714 | } |
1715 | ||
1716 | /* | |
9c6bda17 | 1717 | * [OBSOLETE] |
00e2e675 DG |
1718 | */ |
1719 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1720 | { | |
785d2d0d | 1721 | return -ENOSYS; |
00e2e675 DG |
1722 | } |
1723 | ||
07424f16 DG |
1724 | /* |
1725 | * This is an extension of create session that is ONLY and SHOULD only be used | |
1726 | * by the lttng command line program. It exists to avoid using URI parsing in | |
1727 | * the lttng client. | |
1728 | * | |
1729 | * We need the date and time for the trace path subdirectory for the case where | |
1730 | * the user does NOT define one using either -o or -U. Using the normal | |
1731 | * lttng_create_session API call, we have no clue on the session daemon side if | |
1732 | * the URL was generated automatically by the client or define by the user. | |
1733 | * | |
1734 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
1735 | * string and appends it if necessary to the URI subdirectory before sending it | |
1736 | * to the session daemon. | |
1737 | * | |
1738 | * With this extra function, the lttng_create_session call behavior is not | |
1739 | * changed and the timestamp is appended to the URI on the session daemon side | |
1740 | * if necessary. | |
1741 | */ | |
1742 | int _lttng_create_session_ext(const char *name, const char *url, | |
1743 | const char *datetime) | |
1744 | { | |
3dd05a85 | 1745 | int ret; |
07424f16 DG |
1746 | ssize_t size; |
1747 | struct lttcomm_session_msg lsm; | |
1748 | struct lttng_uri *uris = NULL; | |
1749 | ||
2bba9e53 | 1750 | if (name == NULL || datetime == NULL) { |
2f70b271 | 1751 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
1752 | } |
1753 | ||
1754 | memset(&lsm, 0, sizeof(lsm)); | |
1755 | ||
1756 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 1757 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 DG |
1758 | |
1759 | /* There should never be a data URL */ | |
bc894455 | 1760 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 1761 | if (size < 0) { |
3dd05a85 DG |
1762 | ret = -LTTNG_ERR_INVALID; |
1763 | goto error; | |
07424f16 DG |
1764 | } |
1765 | ||
1766 | lsm.u.uri.size = size; | |
1767 | ||
4b35a6b3 | 1768 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
1769 | /* Don't append datetime if the name was automatically created. */ |
1770 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
1771 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
1772 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
1773 | name, datetime); | |
1774 | } else { | |
1775 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
1776 | } | |
07424f16 DG |
1777 | if (ret < 0) { |
1778 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
1779 | ret = -LTTNG_ERR_FATAL; |
1780 | goto error; | |
07424f16 DG |
1781 | } |
1782 | } | |
1783 | ||
cac3069d DG |
1784 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1785 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1786 | |
1787 | error: | |
1788 | free(uris); | |
1789 | return ret; | |
07424f16 DG |
1790 | } |
1791 | ||
806e2684 DG |
1792 | /* |
1793 | * For a given session name, this call checks if the data is ready to be read | |
1794 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
1795 | * any readers. | |
1796 | */ | |
6d805429 | 1797 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
1798 | { |
1799 | int ret; | |
1800 | struct lttcomm_session_msg lsm; | |
1801 | ||
1802 | if (session_name == NULL) { | |
1803 | return -LTTNG_ERR_INVALID; | |
1804 | } | |
1805 | ||
53efb85a | 1806 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 1807 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 1808 | |
cac3069d DG |
1809 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1810 | sizeof(lsm.session.name)); | |
806e2684 | 1811 | |
cac3069d | 1812 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
806e2684 DG |
1813 | |
1814 | /* | |
cac3069d DG |
1815 | * The lttng_ctl_ask_sessiond function negate the return code if it's not |
1816 | * LTTNG_OK so getting -1 means that the reply ret_code was 1 thus meaning | |
1817 | * that the data is available. Yes it is hackish but for now this is the | |
1818 | * only way. | |
806e2684 DG |
1819 | */ |
1820 | if (ret == -1) { | |
1821 | ret = 1; | |
1822 | } | |
1823 | ||
1824 | return ret; | |
1825 | } | |
1826 | ||
27babd3a DG |
1827 | /* |
1828 | * Create a session exclusively used for snapshot. | |
1829 | * | |
1830 | * Returns LTTNG_OK on success or a negative error code. | |
1831 | */ | |
1832 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1833 | { | |
1834 | int ret; | |
1835 | ssize_t size; | |
1836 | struct lttcomm_session_msg lsm; | |
1837 | struct lttng_uri *uris = NULL; | |
1838 | ||
1839 | if (name == NULL) { | |
1840 | return -LTTNG_ERR_INVALID; | |
1841 | } | |
1842 | ||
1843 | memset(&lsm, 0, sizeof(lsm)); | |
1844 | ||
1845 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
1846 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1847 | ||
1848 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1849 | if (size < 0) { | |
1850 | return -LTTNG_ERR_INVALID; | |
1851 | } | |
1852 | ||
1853 | lsm.u.uri.size = size; | |
1854 | ||
1855 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1856 | sizeof(struct lttng_uri) * size, NULL); | |
1857 | ||
1858 | free(uris); | |
1859 | return ret; | |
1860 | } | |
1861 | ||
ecc48a90 JD |
1862 | /* |
1863 | * Create a session exclusively used for live. | |
1864 | * | |
1865 | * Returns LTTNG_OK on success or a negative error code. | |
1866 | */ | |
1867 | int lttng_create_session_live(const char *name, const char *url, | |
1868 | unsigned int timer_interval) | |
1869 | { | |
1870 | int ret; | |
1871 | ssize_t size; | |
1872 | struct lttcomm_session_msg lsm; | |
1873 | struct lttng_uri *uris = NULL; | |
1874 | ||
1875 | if (name == NULL) { | |
1876 | return -LTTNG_ERR_INVALID; | |
1877 | } | |
1878 | ||
1879 | memset(&lsm, 0, sizeof(lsm)); | |
1880 | ||
1881 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
1882 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1883 | ||
1a241656 DG |
1884 | if (url) { |
1885 | size = uri_parse_str_urls(url, NULL, &uris); | |
1886 | if (size <= 0) { | |
1887 | ret = -LTTNG_ERR_INVALID; | |
1888 | goto end; | |
1889 | } | |
ecc48a90 | 1890 | |
1a241656 DG |
1891 | /* file:// is not accepted for live session. */ |
1892 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
1893 | ret = -LTTNG_ERR_INVALID; | |
1894 | goto end; | |
1895 | } | |
1896 | } else { | |
1897 | size = 0; | |
ecc48a90 JD |
1898 | } |
1899 | ||
1900 | lsm.u.session_live.nb_uri = size; | |
1901 | lsm.u.session_live.timer_interval = timer_interval; | |
1902 | ||
1903 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1904 | sizeof(struct lttng_uri) * size, NULL); | |
1905 | ||
1906 | end: | |
1907 | free(uris); | |
1908 | return ret; | |
1909 | } | |
1910 | ||
fac6795d DG |
1911 | /* |
1912 | * lib constructor | |
1913 | */ | |
1914 | static void __attribute__((constructor)) init() | |
1915 | { | |
1916 | /* Set default session group */ | |
bbccc3d2 | 1917 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 1918 | } |
49cca668 DG |
1919 | |
1920 | /* | |
1921 | * lib destructor | |
1922 | */ | |
1923 | static void __attribute__((destructor)) lttng_ctl_exit() | |
1924 | { | |
1925 | free(tracing_group); | |
1926 | } |