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: |
00e2e675 DG |
109 | memcpy(dst, src, sizeof(struct lttng_domain)); |
110 | break; | |
111 | default: | |
112 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 113 | break; |
cd80958d DG |
114 | } |
115 | } | |
116 | } | |
117 | ||
118 | /* | |
119 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 120 | * |
1c8d13c8 TD |
121 | * On success, returns the number of bytes sent (>=0) |
122 | * On error, returns -1 | |
fac6795d | 123 | */ |
cd80958d | 124 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
125 | { |
126 | int ret; | |
127 | ||
128 | if (!connected) { | |
2f70b271 | 129 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 130 | goto end; |
fac6795d DG |
131 | } |
132 | ||
a4b92340 DG |
133 | DBG("LSM cmd type : %d", lsm->cmd_type); |
134 | ||
be040666 | 135 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 136 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
137 | if (ret < 0) { |
138 | ret = -LTTNG_ERR_FATAL; | |
139 | } | |
e065084a DG |
140 | |
141 | end: | |
142 | return ret; | |
143 | } | |
144 | ||
53a80697 MD |
145 | /* |
146 | * Send var len data to the session daemon. | |
147 | * | |
148 | * On success, returns the number of bytes sent (>=0) | |
149 | * On error, returns -1 | |
150 | */ | |
151 | static int send_session_varlen(void *data, size_t len) | |
152 | { | |
153 | int ret; | |
154 | ||
155 | if (!connected) { | |
2f70b271 | 156 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
157 | goto end; |
158 | } | |
a4b92340 | 159 | |
53a80697 MD |
160 | if (!data || !len) { |
161 | ret = 0; | |
162 | goto end; | |
163 | } | |
164 | ||
165 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
166 | if (ret < 0) { |
167 | ret = -LTTNG_ERR_FATAL; | |
168 | } | |
53a80697 MD |
169 | |
170 | end: | |
171 | return ret; | |
172 | } | |
173 | ||
e065084a | 174 | /* |
cd80958d | 175 | * Receive data from the sessiond socket. |
e065084a | 176 | * |
1c8d13c8 TD |
177 | * On success, returns the number of bytes received (>=0) |
178 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 179 | */ |
ca95a216 | 180 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
181 | { |
182 | int ret; | |
183 | ||
184 | if (!connected) { | |
2f70b271 | 185 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 186 | goto end; |
fac6795d DG |
187 | } |
188 | ||
ca95a216 | 189 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
190 | if (ret < 0) { |
191 | ret = -LTTNG_ERR_FATAL; | |
192 | } | |
fac6795d | 193 | |
e065084a | 194 | end: |
fac6795d DG |
195 | return ret; |
196 | } | |
197 | ||
198 | /* | |
1c8d13c8 | 199 | * Check if we are in the specified group. |
65beb5ff | 200 | * |
2269e89e | 201 | * If yes return 1, else return -1. |
947308c4 | 202 | */ |
6c71277b MD |
203 | LTTNG_HIDDEN |
204 | int lttng_check_tracing_group(void) | |
947308c4 DG |
205 | { |
206 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
207 | gid_t *grp_list; | |
208 | int grp_list_size, grp_id, i; | |
209 | int ret = -1; | |
6c71277b | 210 | const char *grp_name = tracing_group; |
947308c4 DG |
211 | |
212 | /* Get GID of group 'tracing' */ | |
213 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
214 | if (!grp_tracing) { |
215 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
216 | goto end; |
217 | } | |
218 | ||
219 | /* Get number of supplementary group IDs */ | |
220 | grp_list_size = getgroups(0, NULL); | |
221 | if (grp_list_size < 0) { | |
222 | perror("getgroups"); | |
223 | goto end; | |
224 | } | |
225 | ||
226 | /* Alloc group list of the right size */ | |
227 | grp_list = malloc(grp_list_size * sizeof(gid_t)); | |
00795392 | 228 | if (!grp_list) { |
1c8d13c8 | 229 | perror("malloc"); |
00795392 MD |
230 | goto end; |
231 | } | |
947308c4 | 232 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 233 | if (grp_id < 0) { |
947308c4 DG |
234 | perror("getgroups"); |
235 | goto free_list; | |
236 | } | |
237 | ||
238 | for (i = 0; i < grp_list_size; i++) { | |
239 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 240 | ret = 1; |
947308c4 DG |
241 | break; |
242 | } | |
243 | } | |
244 | ||
245 | free_list: | |
246 | free(grp_list); | |
247 | ||
248 | end: | |
249 | return ret; | |
250 | } | |
251 | ||
252 | /* | |
2269e89e DG |
253 | * Try connect to session daemon with sock_path. |
254 | * | |
255 | * Return 0 on success, else -1 | |
256 | */ | |
257 | static int try_connect_sessiond(const char *sock_path) | |
258 | { | |
259 | int ret; | |
260 | ||
261 | /* If socket exist, we check if the daemon listens for connect. */ | |
262 | ret = access(sock_path, F_OK); | |
263 | if (ret < 0) { | |
264 | /* Not alive */ | |
2f70b271 | 265 | goto error; |
2269e89e DG |
266 | } |
267 | ||
268 | ret = lttcomm_connect_unix_sock(sock_path); | |
269 | if (ret < 0) { | |
270 | /* Not alive */ | |
2f70b271 | 271 | goto error; |
2269e89e DG |
272 | } |
273 | ||
274 | ret = lttcomm_close_unix_sock(ret); | |
275 | if (ret < 0) { | |
276 | perror("lttcomm_close_unix_sock"); | |
277 | } | |
278 | ||
279 | return 0; | |
2f70b271 DG |
280 | |
281 | error: | |
282 | return -1; | |
2269e89e DG |
283 | } |
284 | ||
285 | /* | |
2f70b271 DG |
286 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
287 | * variable. | |
288 | * | |
289 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
290 | * is somehow too long or ENOMEM). | |
947308c4 DG |
291 | */ |
292 | static int set_session_daemon_path(void) | |
293 | { | |
2269e89e DG |
294 | int in_tgroup = 0; /* In tracing group */ |
295 | uid_t uid; | |
296 | ||
297 | uid = getuid(); | |
947308c4 | 298 | |
2269e89e DG |
299 | if (uid != 0) { |
300 | /* Are we in the tracing group ? */ | |
6c71277b | 301 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
302 | } |
303 | ||
08a9c49f | 304 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
305 | lttng_ctl_copy_string(sessiond_sock_path, |
306 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 307 | } |
2269e89e | 308 | |
08a9c49f | 309 | if (uid != 0) { |
c617c0c6 MD |
310 | int ret; |
311 | ||
08a9c49f TD |
312 | if (in_tgroup) { |
313 | /* Tracing group */ | |
314 | ret = try_connect_sessiond(sessiond_sock_path); | |
315 | if (ret >= 0) { | |
316 | goto end; | |
2269e89e | 317 | } |
08a9c49f | 318 | /* Global session daemon not available... */ |
2269e89e | 319 | } |
08a9c49f TD |
320 | /* ...or not in tracing group (and not root), default */ |
321 | ||
322 | /* | |
323 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
324 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
325 | */ | |
326 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 327 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 328 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 329 | goto error; |
947308c4 | 330 | } |
947308c4 | 331 | } |
08a9c49f | 332 | end: |
947308c4 | 333 | return 0; |
2f70b271 DG |
334 | |
335 | error: | |
336 | return -1; | |
947308c4 DG |
337 | } |
338 | ||
65beb5ff DG |
339 | /* |
340 | * Connect to the LTTng session daemon. | |
341 | * | |
342 | * On success, return 0. On error, return -1. | |
343 | */ | |
344 | static int connect_sessiond(void) | |
345 | { | |
346 | int ret; | |
347 | ||
da3c9ec1 DG |
348 | /* Don't try to connect if already connected. */ |
349 | if (connected) { | |
350 | return 0; | |
351 | } | |
352 | ||
65beb5ff DG |
353 | ret = set_session_daemon_path(); |
354 | if (ret < 0) { | |
2f70b271 | 355 | goto error; |
65beb5ff DG |
356 | } |
357 | ||
358 | /* Connect to the sesssion daemon */ | |
359 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); | |
360 | if (ret < 0) { | |
2f70b271 | 361 | goto error; |
65beb5ff DG |
362 | } |
363 | ||
364 | sessiond_socket = ret; | |
365 | connected = 1; | |
366 | ||
367 | return 0; | |
2f70b271 DG |
368 | |
369 | error: | |
370 | return -1; | |
65beb5ff DG |
371 | } |
372 | ||
373 | /* | |
1c8d13c8 TD |
374 | * Clean disconnect from the session daemon. |
375 | * On success, return 0. On error, return -1. | |
65beb5ff DG |
376 | */ |
377 | static int disconnect_sessiond(void) | |
378 | { | |
379 | int ret = 0; | |
380 | ||
381 | if (connected) { | |
382 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
383 | sessiond_socket = 0; | |
384 | connected = 0; | |
385 | } | |
386 | ||
387 | return ret; | |
388 | } | |
389 | ||
35a6fdb7 | 390 | /* |
cd80958d | 391 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 392 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 393 | * |
af87c45a | 394 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 395 | */ |
cac3069d DG |
396 | LTTNG_HIDDEN |
397 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
a4b92340 | 398 | void *vardata, size_t varlen, void **buf) |
65beb5ff DG |
399 | { |
400 | int ret; | |
401 | size_t size; | |
402 | void *data = NULL; | |
cd80958d | 403 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
404 | |
405 | ret = connect_sessiond(); | |
406 | if (ret < 0) { | |
2f70b271 | 407 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
408 | goto end; |
409 | } | |
410 | ||
65beb5ff | 411 | /* Send command to session daemon */ |
cd80958d | 412 | ret = send_session_msg(lsm); |
65beb5ff | 413 | if (ret < 0) { |
2f70b271 | 414 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
415 | goto end; |
416 | } | |
53a80697 MD |
417 | /* Send var len data */ |
418 | ret = send_session_varlen(vardata, varlen); | |
419 | if (ret < 0) { | |
2f70b271 | 420 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
421 | goto end; |
422 | } | |
65beb5ff DG |
423 | |
424 | /* Get header from data transmission */ | |
425 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
426 | if (ret < 0) { | |
2f70b271 | 427 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
428 | goto end; |
429 | } | |
430 | ||
431 | /* Check error code if OK */ | |
f73fabfd | 432 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
433 | ret = -llm.ret_code; |
434 | goto end; | |
435 | } | |
436 | ||
437 | size = llm.data_size; | |
438 | if (size == 0) { | |
874d3f84 | 439 | /* If client free with size 0 */ |
a45d5536 DG |
440 | if (buf != NULL) { |
441 | *buf = NULL; | |
442 | } | |
7d29a247 | 443 | ret = 0; |
65beb5ff DG |
444 | goto end; |
445 | } | |
446 | ||
447 | data = (void*) malloc(size); | |
448 | ||
449 | /* Get payload data */ | |
450 | ret = recv_data_sessiond(data, size); | |
451 | if (ret < 0) { | |
452 | free(data); | |
453 | goto end; | |
454 | } | |
455 | ||
83009e5e DG |
456 | /* |
457 | * Extra protection not to dereference a NULL pointer. If buf is NULL at | |
458 | * this point, an error is returned and data is freed. | |
459 | */ | |
460 | if (buf == NULL) { | |
2f70b271 | 461 | ret = -LTTNG_ERR_INVALID; |
83009e5e DG |
462 | free(data); |
463 | goto end; | |
464 | } | |
465 | ||
65beb5ff DG |
466 | *buf = data; |
467 | ret = size; | |
468 | ||
469 | end: | |
470 | disconnect_sessiond(); | |
471 | return ret; | |
472 | } | |
473 | ||
9f19cc17 | 474 | /* |
cd80958d | 475 | * Create lttng handle and return pointer. |
1c8d13c8 | 476 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 477 | */ |
cd80958d DG |
478 | struct lttng_handle *lttng_create_handle(const char *session_name, |
479 | struct lttng_domain *domain) | |
9f19cc17 | 480 | { |
2f70b271 DG |
481 | struct lttng_handle *handle = NULL; |
482 | ||
483 | if (domain == NULL) { | |
484 | goto end; | |
485 | } | |
cd80958d DG |
486 | |
487 | handle = malloc(sizeof(struct lttng_handle)); | |
488 | if (handle == NULL) { | |
2f70b271 | 489 | PERROR("malloc handle"); |
cd80958d DG |
490 | goto end; |
491 | } | |
492 | ||
493 | /* Copy session name */ | |
cac3069d | 494 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
495 | sizeof(handle->session_name)); |
496 | ||
497 | /* Copy lttng domain */ | |
cac3069d | 498 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); |
cd80958d DG |
499 | |
500 | end: | |
501 | return handle; | |
502 | } | |
503 | ||
504 | /* | |
505 | * Destroy handle by free(3) the pointer. | |
506 | */ | |
507 | void lttng_destroy_handle(struct lttng_handle *handle) | |
508 | { | |
0e428499 | 509 | free(handle); |
eb354453 DG |
510 | } |
511 | ||
d9800920 DG |
512 | /* |
513 | * Register an outside consumer. | |
1c8d13c8 | 514 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
515 | */ |
516 | int lttng_register_consumer(struct lttng_handle *handle, | |
517 | const char *socket_path) | |
518 | { | |
519 | struct lttcomm_session_msg lsm; | |
520 | ||
2f70b271 DG |
521 | if (handle == NULL || socket_path == NULL) { |
522 | return -LTTNG_ERR_INVALID; | |
523 | } | |
524 | ||
53efb85a | 525 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 526 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 527 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 528 | sizeof(lsm.session.name)); |
cac3069d | 529 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 530 | |
cac3069d | 531 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
d9800920 | 532 | |
cac3069d | 533 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
534 | } |
535 | ||
1df4dedd | 536 | /* |
1c8d13c8 TD |
537 | * Start tracing for all traces of the session. |
538 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 539 | */ |
6a4f824d | 540 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 541 | { |
cd80958d DG |
542 | struct lttcomm_session_msg lsm; |
543 | ||
6a4f824d | 544 | if (session_name == NULL) { |
2f70b271 | 545 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
546 | } |
547 | ||
53efb85a | 548 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 549 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 550 | |
cac3069d DG |
551 | lttng_ctl_copy_string(lsm.session.name, session_name, |
552 | sizeof(lsm.session.name)); | |
cd80958d | 553 | |
cac3069d | 554 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 555 | } |
1df4dedd DG |
556 | |
557 | /* | |
38ee087f | 558 | * Stop tracing for all traces of the session. |
f3ed775e | 559 | */ |
38ee087f | 560 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 561 | { |
38ee087f | 562 | int ret, data_ret; |
cd80958d DG |
563 | struct lttcomm_session_msg lsm; |
564 | ||
6a4f824d | 565 | if (session_name == NULL) { |
2f70b271 | 566 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
567 | } |
568 | ||
53efb85a | 569 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 570 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 571 | |
cac3069d DG |
572 | lttng_ctl_copy_string(lsm.session.name, session_name, |
573 | sizeof(lsm.session.name)); | |
cd80958d | 574 | |
cac3069d | 575 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
576 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
577 | goto error; | |
578 | } | |
579 | ||
580 | if (!wait) { | |
581 | goto end; | |
582 | } | |
583 | ||
38ee087f DG |
584 | /* Check for data availability */ |
585 | do { | |
6d805429 | 586 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
587 | if (data_ret < 0) { |
588 | /* Return the data available call error. */ | |
589 | ret = data_ret; | |
590 | goto error; | |
591 | } | |
592 | ||
593 | /* | |
594 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
595 | * returned value indicates availability. | |
596 | */ | |
6d805429 | 597 | if (data_ret) { |
38ee087f | 598 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 599 | } |
6d805429 | 600 | } while (data_ret != 0); |
38ee087f | 601 | |
38ee087f DG |
602 | end: |
603 | error: | |
604 | return ret; | |
605 | } | |
606 | ||
607 | /* | |
608 | * Stop tracing and wait for data availability. | |
609 | */ | |
610 | int lttng_stop_tracing(const char *session_name) | |
611 | { | |
612 | return _lttng_stop_tracing(session_name, 1); | |
613 | } | |
614 | ||
615 | /* | |
616 | * Stop tracing but _don't_ wait for data availability. | |
617 | */ | |
618 | int lttng_stop_tracing_no_wait(const char *session_name) | |
619 | { | |
620 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
621 | } |
622 | ||
623 | /* | |
601d5acf DG |
624 | * Add context to a channel. |
625 | * | |
626 | * If the given channel is NULL, add the contexts to all channels. | |
627 | * The event_name param is ignored. | |
af87c45a DG |
628 | * |
629 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 630 | */ |
cd80958d | 631 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
632 | struct lttng_event_context *ctx, const char *event_name, |
633 | const char *channel_name) | |
d65106b1 | 634 | { |
cd80958d DG |
635 | struct lttcomm_session_msg lsm; |
636 | ||
9d697d3d DG |
637 | /* Safety check. Both are mandatory */ |
638 | if (handle == NULL || ctx == NULL) { | |
2f70b271 | 639 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
640 | } |
641 | ||
441c16a7 MD |
642 | memset(&lsm, 0, sizeof(lsm)); |
643 | ||
cd80958d DG |
644 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
645 | ||
85076754 MD |
646 | /* If no channel name, send empty string. */ |
647 | if (channel_name == NULL) { | |
648 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
649 | sizeof(lsm.u.context.channel_name)); | |
650 | } else { | |
651 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
652 | sizeof(lsm.u.context.channel_name)); | |
653 | } | |
cd80958d | 654 | |
cac3069d | 655 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d65106b1 | 656 | |
9d697d3d | 657 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); |
d65106b1 | 658 | |
cac3069d | 659 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
660 | sizeof(lsm.session.name)); |
661 | ||
cac3069d | 662 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d65106b1 DG |
663 | } |
664 | ||
f3ed775e | 665 | /* |
1c8d13c8 TD |
666 | * Enable event(s) for a channel. |
667 | * If no event name is specified, all events are enabled. | |
668 | * If no channel name is specified, the default 'channel0' is used. | |
669 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 670 | */ |
cd80958d | 671 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 672 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 673 | { |
f8a96544 JI |
674 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
675 | NULL, 0, NULL); | |
1df4dedd DG |
676 | } |
677 | ||
53a80697 | 678 | /* |
025faf73 | 679 | * Create or enable an event with a filter expression. |
178191b3 | 680 | * |
53a80697 MD |
681 | * Return negative error value on error. |
682 | * Return size of returned session payload data if OK. | |
683 | */ | |
025faf73 | 684 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 685 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
686 | const char *filter_expression) |
687 | { | |
f8a96544 JI |
688 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
689 | filter_expression, 0, NULL); | |
53a80697 MD |
690 | } |
691 | ||
347c5ab5 DG |
692 | /* |
693 | * Depending on the event, return a newly allocated JUL filter expression or | |
694 | * NULL if not applicable. | |
695 | * | |
696 | * An event with NO loglevel and the name is * will return NULL. | |
697 | */ | |
698 | static char *set_jul_filter(const char *filter, struct lttng_event *ev) | |
699 | { | |
700 | int err; | |
701 | char *jul_filter = NULL; | |
702 | ||
703 | assert(ev); | |
704 | ||
705 | /* Don't add filter for the '*' event. */ | |
706 | if (ev->name[0] != '*') { | |
707 | if (filter) { | |
fb0edb23 | 708 | err = asprintf(&jul_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
709 | ev->name); |
710 | } else { | |
711 | err = asprintf(&jul_filter, "logger_name == \"%s\"", ev->name); | |
712 | } | |
713 | if (err < 0) { | |
714 | PERROR("asprintf"); | |
6a556f7b | 715 | goto error; |
347c5ab5 DG |
716 | } |
717 | } | |
718 | ||
719 | /* Add loglevel filtering if any for the JUL domain. */ | |
720 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
721 | char *op; | |
722 | ||
723 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
724 | op = ">="; | |
725 | } else { | |
726 | op = "=="; | |
727 | } | |
728 | ||
6a556f7b JG |
729 | if (filter || jul_filter) { |
730 | char *new_filter; | |
731 | ||
fb0edb23 | 732 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
6a556f7b | 733 | jul_filter ? jul_filter : filter, op, |
347c5ab5 | 734 | ev->loglevel); |
6a556f7b JG |
735 | if (jul_filter) { |
736 | free(jul_filter); | |
737 | } | |
738 | jul_filter = new_filter; | |
347c5ab5 DG |
739 | } else { |
740 | err = asprintf(&jul_filter, "int_loglevel %s %d", op, | |
741 | ev->loglevel); | |
742 | } | |
743 | if (err < 0) { | |
744 | PERROR("asprintf"); | |
6a556f7b | 745 | goto error; |
347c5ab5 DG |
746 | } |
747 | } | |
748 | ||
347c5ab5 | 749 | return jul_filter; |
6a556f7b JG |
750 | error: |
751 | free(jul_filter); | |
752 | return NULL; | |
347c5ab5 DG |
753 | } |
754 | ||
137b9942 DG |
755 | /* |
756 | * Generate the filter bytecode from a give filter expression string. Put the | |
757 | * newly allocated parser context in ctxp and populate the lsm object with the | |
758 | * expression len. | |
759 | * | |
760 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
761 | */ | |
762 | static int generate_filter(char *filter_expression, | |
763 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
764 | { | |
765 | int ret; | |
766 | struct filter_parser_ctx *ctx = NULL; | |
767 | FILE *fmem = NULL; | |
768 | ||
769 | assert(filter_expression); | |
770 | assert(lsm); | |
771 | assert(ctxp); | |
772 | ||
773 | /* | |
774 | * Casting const to non-const, as the underlying function will use it in | |
775 | * read-only mode. | |
776 | */ | |
777 | fmem = lttng_fmemopen((void *) filter_expression, | |
778 | strlen(filter_expression), "r"); | |
779 | if (!fmem) { | |
780 | fprintf(stderr, "Error opening memory as stream\n"); | |
781 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
782 | goto error; | |
783 | } | |
784 | ctx = filter_parser_ctx_alloc(fmem); | |
785 | if (!ctx) { | |
786 | fprintf(stderr, "Error allocating parser\n"); | |
787 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
788 | goto filter_alloc_error; | |
789 | } | |
790 | ret = filter_parser_ctx_append_ast(ctx); | |
791 | if (ret) { | |
792 | fprintf(stderr, "Parse error\n"); | |
793 | ret = -LTTNG_ERR_FILTER_INVAL; | |
794 | goto parse_error; | |
795 | } | |
796 | ret = filter_visitor_set_parent(ctx); | |
797 | if (ret) { | |
798 | fprintf(stderr, "Set parent error\n"); | |
799 | ret = -LTTNG_ERR_FILTER_INVAL; | |
800 | goto parse_error; | |
801 | } | |
802 | if (print_xml) { | |
803 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
804 | if (ret) { | |
805 | fflush(stdout); | |
806 | fprintf(stderr, "XML print error\n"); | |
807 | ret = -LTTNG_ERR_FILTER_INVAL; | |
808 | goto parse_error; | |
809 | } | |
810 | } | |
811 | ||
812 | dbg_printf("Generating IR... "); | |
813 | fflush(stdout); | |
814 | ret = filter_visitor_ir_generate(ctx); | |
815 | if (ret) { | |
816 | fprintf(stderr, "Generate IR error\n"); | |
817 | ret = -LTTNG_ERR_FILTER_INVAL; | |
818 | goto parse_error; | |
819 | } | |
820 | dbg_printf("done\n"); | |
821 | ||
822 | dbg_printf("Validating IR... "); | |
823 | fflush(stdout); | |
824 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
825 | if (ret) { | |
826 | ret = -LTTNG_ERR_FILTER_INVAL; | |
827 | goto parse_error; | |
828 | } | |
dcd5daf2 JG |
829 | /* Validate strings used as literals in the expression */ |
830 | ret = filter_visitor_ir_validate_string(ctx); | |
831 | if (ret) { | |
832 | ret = -LTTNG_ERR_FILTER_INVAL; | |
833 | goto parse_error; | |
834 | } | |
137b9942 DG |
835 | dbg_printf("done\n"); |
836 | ||
837 | dbg_printf("Generating bytecode... "); | |
838 | fflush(stdout); | |
839 | ret = filter_visitor_bytecode_generate(ctx); | |
840 | if (ret) { | |
841 | fprintf(stderr, "Generate bytecode error\n"); | |
842 | ret = -LTTNG_ERR_FILTER_INVAL; | |
843 | goto parse_error; | |
844 | } | |
845 | dbg_printf("done\n"); | |
846 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
847 | bytecode_get_len(&ctx->bytecode->b)); | |
848 | ||
849 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
850 | + bytecode_get_len(&ctx->bytecode->b); | |
851 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
852 | ||
853 | /* No need to keep the memory stream. */ | |
854 | if (fclose(fmem) != 0) { | |
855 | perror("fclose"); | |
856 | } | |
857 | ||
858 | *ctxp = ctx; | |
859 | return 0; | |
860 | ||
861 | parse_error: | |
137b9942 DG |
862 | filter_ir_free(ctx); |
863 | filter_parser_ctx_free(ctx); | |
864 | filter_alloc_error: | |
865 | if (fclose(fmem) != 0) { | |
866 | perror("fclose"); | |
867 | } | |
868 | error: | |
869 | return ret; | |
870 | } | |
871 | ||
93deb080 JI |
872 | /* |
873 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
874 | * If no event name is specified, all events are enabled. | |
875 | * If no channel name is specified, the default name is used. | |
876 | * If filter expression is not NULL, the filter is set for the event. | |
877 | * If exclusion count is not zero, the exclusions are set for the event. | |
878 | * Returns size of returned session payload data or a negative error code. | |
879 | */ | |
880 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
881 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 882 | const char *original_filter_expression, |
93deb080 JI |
883 | int exclusion_count, char **exclusion_list) |
884 | { | |
885 | struct lttcomm_session_msg lsm; | |
64226865 | 886 | char *varlen_data; |
93deb080 | 887 | int ret = 0; |
137b9942 | 888 | unsigned int free_filter_expression = 0; |
93deb080 | 889 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
890 | /* |
891 | * Cast as non-const since we may replace the filter expression | |
892 | * by a dynamically allocated string. Otherwise, the original | |
893 | * string is not modified. | |
894 | */ | |
895 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
896 | |
897 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
898 | ret = -LTTNG_ERR_INVALID; |
899 | goto error; | |
93deb080 JI |
900 | } |
901 | ||
902 | /* Empty filter string will always be rejected by the parser | |
903 | * anyway, so treat this corner-case early to eliminate | |
904 | * lttng_fmemopen error for 0-byte allocation. | |
905 | */ | |
906 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
907 | ret = -LTTNG_ERR_INVALID; |
908 | goto error; | |
93deb080 JI |
909 | } |
910 | ||
911 | memset(&lsm, 0, sizeof(lsm)); | |
912 | ||
913 | /* If no channel name, send empty string. */ | |
914 | if (channel_name == NULL) { | |
915 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
916 | sizeof(lsm.u.enable.channel_name)); | |
917 | } else { | |
918 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
919 | sizeof(lsm.u.enable.channel_name)); | |
920 | } | |
921 | ||
6565421f DG |
922 | if (ev->name[0] != '\0') { |
923 | lsm.cmd_type = LTTNG_ENABLE_EVENT; | |
924 | } else { | |
925 | lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT; | |
926 | } | |
93deb080 | 927 | |
6565421f | 928 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
93deb080 JI |
929 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
930 | ||
931 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
932 | sizeof(lsm.session.name)); | |
933 | lsm.u.enable.exclusion_count = exclusion_count; | |
934 | lsm.u.enable.bytecode_len = 0; | |
935 | ||
9b21e6d5 DG |
936 | /* |
937 | * For the JUL domain, a filter is enforced except for the enable all | |
938 | * event. This is done to avoid having the event in all sessions thus | |
939 | * filtering by logger name. | |
940 | */ | |
941 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 DG |
942 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
943 | handle->domain.type != LTTNG_DOMAIN_LOG4J)) { | |
3e1c9ff7 | 944 | goto ask_sessiond; |
93deb080 JI |
945 | } |
946 | ||
947 | /* | |
948 | * We have either a filter or some exclusions, so we need to set up | |
949 | * a variable-length memory block from where to send the data | |
950 | */ | |
951 | ||
952 | /* Parse filter expression */ | |
5cdb6027 DG |
953 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
954 | || handle->domain.type == LTTNG_DOMAIN_LOG4J) { | |
955 | if (handle->domain.type == LTTNG_DOMAIN_JUL || | |
956 | handle->domain.type == LTTNG_DOMAIN_LOG4J) { | |
64226865 DG |
957 | char *jul_filter; |
958 | ||
347c5ab5 | 959 | /* Setup JUL filter if needed. */ |
64226865 | 960 | jul_filter = set_jul_filter(filter_expression, ev); |
137b9942 DG |
961 | if (!jul_filter) { |
962 | if (!filter_expression) { | |
963 | /* No JUL and no filter, just skip everything below. */ | |
964 | goto ask_sessiond; | |
965 | } | |
64226865 DG |
966 | } else { |
967 | /* | |
968 | * With a JUL filter, the original filter has been added to it | |
969 | * thus replace the filter expression. | |
970 | */ | |
e9efbcd3 JG |
971 | filter_expression = jul_filter; |
972 | free_filter_expression = 1; | |
9b21e6d5 | 973 | } |
9b21e6d5 | 974 | } |
93deb080 | 975 | |
137b9942 | 976 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 977 | if (ret) { |
137b9942 | 978 | goto filter_error; |
93deb080 | 979 | } |
6b453b5e JG |
980 | } |
981 | ||
982 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
983 | + lsm.u.enable.expression_len |
984 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
985 | if (!varlen_data) { |
986 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 987 | goto mem_error; |
6b453b5e | 988 | } |
137b9942 | 989 | |
6b453b5e JG |
990 | /* Put exclusion names first in the data */ |
991 | while (exclusion_count--) { | |
992 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
137b9942 | 993 | *(exclusion_list + exclusion_count), LTTNG_SYMBOL_NAME_LEN); |
6b453b5e JG |
994 | } |
995 | /* Add filter expression next */ | |
996 | if (lsm.u.enable.expression_len != 0) { | |
997 | memcpy(varlen_data | |
998 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
999 | filter_expression, | |
1000 | lsm.u.enable.expression_len); | |
1001 | } | |
1002 | /* Add filter bytecode next */ | |
137b9942 | 1003 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1004 | memcpy(varlen_data |
1005 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1006 | + lsm.u.enable.expression_len, | |
1007 | &ctx->bytecode->b, | |
1008 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1009 | } |
1010 | ||
1011 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data, | |
67676bd8 | 1012 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
137b9942 | 1013 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, NULL); |
6b453b5e | 1014 | free(varlen_data); |
93deb080 | 1015 | |
7ca1dc6f DG |
1016 | mem_error: |
1017 | if (filter_expression && ctx) { | |
93deb080 JI |
1018 | filter_bytecode_free(ctx); |
1019 | filter_ir_free(ctx); | |
1020 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1021 | } |
1022 | filter_error: | |
1023 | if (free_filter_expression) { | |
1024 | /* | |
1025 | * The filter expression has been replaced and must be freed as it is | |
1026 | * not the original filter expression received as a parameter. | |
1027 | */ | |
1028 | free(filter_expression); | |
93deb080 | 1029 | } |
137b9942 DG |
1030 | error: |
1031 | /* | |
1032 | * Return directly to the caller and don't ask the sessiond since something | |
1033 | * went wrong in the parsing of data above. | |
1034 | */ | |
93deb080 | 1035 | return ret; |
3e1c9ff7 DG |
1036 | |
1037 | ask_sessiond: | |
1038 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1039 | return ret; | |
93deb080 JI |
1040 | } |
1041 | ||
1df4dedd | 1042 | /* |
1c8d13c8 TD |
1043 | * Disable event(s) of a channel and domain. |
1044 | * If no event name is specified, all events are disabled. | |
1045 | * If no channel name is specified, the default 'channel0' is used. | |
1046 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 1047 | */ |
cd80958d | 1048 | int lttng_disable_event(struct lttng_handle *handle, const char *name, |
38057ed1 | 1049 | const char *channel_name) |
1df4dedd | 1050 | { |
cd80958d | 1051 | struct lttcomm_session_msg lsm; |
1df4dedd | 1052 | |
9d697d3d | 1053 | if (handle == NULL) { |
2f70b271 | 1054 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1055 | } |
1056 | ||
441c16a7 MD |
1057 | memset(&lsm, 0, sizeof(lsm)); |
1058 | ||
85076754 MD |
1059 | /* If no channel name, send empty string. */ |
1060 | if (channel_name == NULL) { | |
1061 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1062 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1063 | } else { |
85076754 | 1064 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1065 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1066 | } |
1067 | ||
cac3069d | 1068 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f5177a38 | 1069 | |
d979615c | 1070 | if (name != NULL && *name != '*') { |
cac3069d DG |
1071 | lttng_ctl_copy_string(lsm.u.disable.name, name, |
1072 | sizeof(lsm.u.disable.name)); | |
cd80958d | 1073 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f5177a38 | 1074 | } else { |
cd80958d | 1075 | lsm.cmd_type = LTTNG_DISABLE_ALL_EVENT; |
f3ed775e DG |
1076 | } |
1077 | ||
cac3069d | 1078 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1079 | sizeof(lsm.session.name)); |
1080 | ||
cac3069d | 1081 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
1df4dedd DG |
1082 | } |
1083 | ||
1084 | /* | |
1c8d13c8 TD |
1085 | * Enable channel per domain |
1086 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1087 | */ |
cd80958d | 1088 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 1089 | struct lttng_channel *chan) |
a5c5a2bd | 1090 | { |
cd80958d DG |
1091 | struct lttcomm_session_msg lsm; |
1092 | ||
5117eeec DG |
1093 | /* |
1094 | * NULL arguments are forbidden. No default values. | |
1095 | */ | |
1096 | if (handle == NULL || chan == NULL) { | |
2f70b271 | 1097 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1098 | } |
1099 | ||
441c16a7 MD |
1100 | memset(&lsm, 0, sizeof(lsm)); |
1101 | ||
5117eeec | 1102 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 1103 | |
cd80958d DG |
1104 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
1105 | ||
cac3069d | 1106 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1107 | |
cac3069d | 1108 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1109 | sizeof(lsm.session.name)); |
1110 | ||
cac3069d | 1111 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1112 | } |
1df4dedd | 1113 | |
2ef84c95 | 1114 | /* |
1c8d13c8 TD |
1115 | * All tracing will be stopped for registered events of the channel. |
1116 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1117 | */ |
cd80958d | 1118 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1119 | { |
cd80958d DG |
1120 | struct lttcomm_session_msg lsm; |
1121 | ||
9d697d3d DG |
1122 | /* Safety check. Both are mandatory */ |
1123 | if (handle == NULL || name == NULL) { | |
2f70b271 | 1124 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1125 | } |
1126 | ||
441c16a7 MD |
1127 | memset(&lsm, 0, sizeof(lsm)); |
1128 | ||
cd80958d | 1129 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1130 | |
cac3069d | 1131 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1132 | sizeof(lsm.u.disable.channel_name)); |
1133 | ||
cac3069d | 1134 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1135 | |
cac3069d | 1136 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1137 | sizeof(lsm.session.name)); |
1138 | ||
cac3069d | 1139 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1140 | } |
1141 | ||
fac6795d | 1142 | /* |
1c8d13c8 TD |
1143 | * Lists all available tracepoints of domain. |
1144 | * Sets the contents of the events array. | |
1145 | * Returns the number of lttng_event entries in events; | |
1146 | * on error, returns a negative value. | |
fac6795d | 1147 | */ |
cd80958d | 1148 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1149 | struct lttng_event **events) |
fac6795d | 1150 | { |
052da939 | 1151 | int ret; |
cd80958d DG |
1152 | struct lttcomm_session_msg lsm; |
1153 | ||
9d697d3d | 1154 | if (handle == NULL) { |
2f70b271 | 1155 | return -LTTNG_ERR_INVALID; |
cd80958d | 1156 | } |
fac6795d | 1157 | |
53efb85a | 1158 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1159 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1160 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1161 | |
cac3069d | 1162 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1163 | if (ret < 0) { |
1164 | return ret; | |
eb354453 | 1165 | } |
fac6795d | 1166 | |
9f19cc17 | 1167 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1168 | } |
1169 | ||
f37d259d MD |
1170 | /* |
1171 | * Lists all available tracepoint fields of domain. | |
1172 | * Sets the contents of the event field array. | |
1173 | * Returns the number of lttng_event_field entries in events; | |
1174 | * on error, returns a negative value. | |
1175 | */ | |
1176 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1177 | struct lttng_event_field **fields) | |
1178 | { | |
1179 | int ret; | |
1180 | struct lttcomm_session_msg lsm; | |
1181 | ||
1182 | if (handle == NULL) { | |
2f70b271 | 1183 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1184 | } |
1185 | ||
53efb85a | 1186 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1187 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1188 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1189 | |
cac3069d | 1190 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1191 | if (ret < 0) { |
1192 | return ret; | |
1193 | } | |
1194 | ||
1195 | return ret / sizeof(struct lttng_event_field); | |
1196 | } | |
1197 | ||
1657e9bb | 1198 | /* |
1c8d13c8 TD |
1199 | * Returns a human readable string describing |
1200 | * the error code (a negative value). | |
1657e9bb | 1201 | */ |
9a745bc7 | 1202 | const char *lttng_strerror(int code) |
1657e9bb | 1203 | { |
f73fabfd | 1204 | return error_get_str(code); |
1657e9bb DG |
1205 | } |
1206 | ||
aaf97519 | 1207 | /* |
a4b92340 DG |
1208 | * Create a brand new session using name and url for destination. |
1209 | * | |
f73fabfd | 1210 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1211 | */ |
a4b92340 | 1212 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1213 | { |
3dd05a85 | 1214 | int ret; |
a4b92340 | 1215 | ssize_t size; |
00e2e675 | 1216 | struct lttcomm_session_msg lsm; |
a4b92340 | 1217 | struct lttng_uri *uris = NULL; |
00e2e675 | 1218 | |
a4b92340 | 1219 | if (name == NULL) { |
2f70b271 | 1220 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1221 | } |
1222 | ||
a4b92340 | 1223 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1224 | |
a4b92340 | 1225 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1226 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1227 | |
1228 | /* There should never be a data URL */ | |
bc894455 | 1229 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1230 | if (size < 0) { |
2f70b271 | 1231 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1232 | } |
1233 | ||
a4b92340 DG |
1234 | lsm.u.uri.size = size; |
1235 | ||
cac3069d DG |
1236 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1237 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1238 | |
1239 | free(uris); | |
1240 | return ret; | |
00e2e675 DG |
1241 | } |
1242 | ||
8028d920 | 1243 | /* |
8028d920 | 1244 | * Destroy session using name. |
1c8d13c8 | 1245 | * Returns size of returned session payload data or a negative error code. |
8028d920 | 1246 | */ |
843f5df9 | 1247 | int lttng_destroy_session(const char *session_name) |
8028d920 | 1248 | { |
cd80958d DG |
1249 | struct lttcomm_session_msg lsm; |
1250 | ||
843f5df9 | 1251 | if (session_name == NULL) { |
2f70b271 | 1252 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1253 | } |
1254 | ||
53efb85a | 1255 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1256 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1257 | |
cac3069d DG |
1258 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1259 | sizeof(lsm.session.name)); | |
cd80958d | 1260 | |
cac3069d | 1261 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1262 | } |
1263 | ||
57167058 | 1264 | /* |
57167058 | 1265 | * Ask the session daemon for all available sessions. |
1c8d13c8 TD |
1266 | * Sets the contents of the sessions array. |
1267 | * Returns the number of lttng_session entries in sessions; | |
1268 | * on error, returns a negative value. | |
57167058 | 1269 | */ |
ca95a216 | 1270 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1271 | { |
ca95a216 | 1272 | int ret; |
cd80958d | 1273 | struct lttcomm_session_msg lsm; |
57167058 | 1274 | |
53efb85a | 1275 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1276 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1277 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1278 | if (ret < 0) { |
ca95a216 | 1279 | return ret; |
57167058 DG |
1280 | } |
1281 | ||
ca95a216 | 1282 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1283 | } |
1284 | ||
9f19cc17 | 1285 | /* |
1c8d13c8 TD |
1286 | * Ask the session daemon for all available domains of a session. |
1287 | * Sets the contents of the domains array. | |
1288 | * Returns the number of lttng_domain entries in domains; | |
1289 | * on error, returns a negative value. | |
9f19cc17 | 1290 | */ |
330be774 | 1291 | int lttng_list_domains(const char *session_name, |
cd80958d | 1292 | struct lttng_domain **domains) |
9f19cc17 DG |
1293 | { |
1294 | int ret; | |
cd80958d DG |
1295 | struct lttcomm_session_msg lsm; |
1296 | ||
330be774 | 1297 | if (session_name == NULL) { |
2f70b271 | 1298 | return -LTTNG_ERR_INVALID; |
cd80958d | 1299 | } |
9f19cc17 | 1300 | |
53efb85a | 1301 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1302 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1303 | ||
cac3069d DG |
1304 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1305 | sizeof(lsm.session.name)); | |
cd80958d | 1306 | |
cac3069d | 1307 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1308 | if (ret < 0) { |
1309 | return ret; | |
1310 | } | |
1311 | ||
1312 | return ret / sizeof(struct lttng_domain); | |
1313 | } | |
1314 | ||
1315 | /* | |
1c8d13c8 TD |
1316 | * Ask the session daemon for all available channels of a session. |
1317 | * Sets the contents of the channels array. | |
1318 | * Returns the number of lttng_channel entries in channels; | |
1319 | * on error, returns a negative value. | |
9f19cc17 | 1320 | */ |
cd80958d DG |
1321 | int lttng_list_channels(struct lttng_handle *handle, |
1322 | struct lttng_channel **channels) | |
9f19cc17 DG |
1323 | { |
1324 | int ret; | |
cd80958d DG |
1325 | struct lttcomm_session_msg lsm; |
1326 | ||
9d697d3d | 1327 | if (handle == NULL) { |
2f70b271 | 1328 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1329 | } |
1330 | ||
53efb85a | 1331 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1332 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1333 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1334 | sizeof(lsm.session.name)); |
9f19cc17 | 1335 | |
cac3069d | 1336 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1337 | |
cac3069d | 1338 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1339 | if (ret < 0) { |
1340 | return ret; | |
1341 | } | |
1342 | ||
1343 | return ret / sizeof(struct lttng_channel); | |
1344 | } | |
1345 | ||
1346 | /* | |
1c8d13c8 TD |
1347 | * Ask the session daemon for all available events of a session channel. |
1348 | * Sets the contents of the events array. | |
1349 | * Returns the number of lttng_event entries in events; | |
1350 | * on error, returns a negative value. | |
9f19cc17 | 1351 | */ |
cd80958d DG |
1352 | int lttng_list_events(struct lttng_handle *handle, |
1353 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1354 | { |
1355 | int ret; | |
cd80958d | 1356 | struct lttcomm_session_msg lsm; |
9f19cc17 | 1357 | |
9d697d3d DG |
1358 | /* Safety check. An handle and channel name are mandatory */ |
1359 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1360 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1361 | } |
1362 | ||
53efb85a | 1363 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1364 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1365 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1366 | sizeof(lsm.session.name)); |
cac3069d | 1367 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d DG |
1368 | sizeof(lsm.u.list.channel_name)); |
1369 | ||
cac3069d | 1370 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1371 | |
cac3069d | 1372 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) events); |
9f19cc17 DG |
1373 | if (ret < 0) { |
1374 | return ret; | |
1375 | } | |
1376 | ||
1377 | return ret / sizeof(struct lttng_event); | |
1378 | } | |
1379 | ||
fac6795d | 1380 | /* |
1c8d13c8 TD |
1381 | * Sets the tracing_group variable with name. |
1382 | * This function allocates memory pointed to by tracing_group. | |
1383 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1384 | */ |
1385 | int lttng_set_tracing_group(const char *name) | |
1386 | { | |
9d697d3d | 1387 | if (name == NULL) { |
2f70b271 | 1388 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1389 | } |
1390 | ||
fac6795d | 1391 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1392 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1393 | } |
1394 | ||
1395 | return 0; | |
1396 | } | |
1397 | ||
d0254c7c | 1398 | /* |
af87c45a | 1399 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1400 | */ |
cd80958d | 1401 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1402 | struct lttng_calibrate *calibrate) |
1403 | { | |
cd80958d | 1404 | struct lttcomm_session_msg lsm; |
d0254c7c | 1405 | |
9d697d3d DG |
1406 | /* Safety check. NULL pointer are forbidden */ |
1407 | if (handle == NULL || calibrate == NULL) { | |
2f70b271 | 1408 | return -LTTNG_ERR_INVALID; |
cd80958d | 1409 | } |
d0254c7c | 1410 | |
53efb85a | 1411 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1412 | lsm.cmd_type = LTTNG_CALIBRATE; |
cac3069d | 1413 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d0254c7c | 1414 | |
cd80958d DG |
1415 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1416 | ||
cac3069d | 1417 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d0254c7c MD |
1418 | } |
1419 | ||
5edd7e09 DG |
1420 | /* |
1421 | * Set default channel attributes. | |
441c16a7 | 1422 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1423 | */ |
1424 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1425 | struct lttng_channel_attr *attr) | |
1426 | { | |
1427 | /* Safety check */ | |
1428 | if (attr == NULL || domain == NULL) { | |
1429 | return; | |
1430 | } | |
1431 | ||
eacaa7a6 DS |
1432 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1433 | ||
0a9c6494 DG |
1434 | /* Same for all domains. */ |
1435 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1436 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1437 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1438 | ||
5edd7e09 DG |
1439 | switch (domain->type) { |
1440 | case LTTNG_DOMAIN_KERNEL: | |
d92ff3ef DG |
1441 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
1442 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
3e230f92 | 1443 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1444 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1445 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1446 | break; | |
1447 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1448 | switch (domain->buf_type) { |
1449 | case LTTNG_BUFFER_PER_UID: | |
1450 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1451 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1452 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
1453 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1454 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
1455 | break; | |
1456 | case LTTNG_BUFFER_PER_PID: | |
1457 | default: | |
1458 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1459 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1460 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
1461 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1462 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
1463 | break; | |
1464 | } | |
5edd7e09 | 1465 | default: |
441c16a7 | 1466 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1467 | break; |
1468 | } | |
1469 | } | |
1470 | ||
fac6795d | 1471 | /* |
2269e89e | 1472 | * Check if session daemon is alive. |
fac6795d | 1473 | * |
2269e89e | 1474 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1475 | * On error returns a negative value. |
fac6795d | 1476 | */ |
947308c4 | 1477 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1478 | { |
1479 | int ret; | |
1480 | ||
1481 | ret = set_session_daemon_path(); | |
1482 | if (ret < 0) { | |
947308c4 | 1483 | /* Error */ |
fac6795d DG |
1484 | return ret; |
1485 | } | |
1486 | ||
9d035200 | 1487 | if (*sessiond_sock_path == '\0') { |
2f70b271 DG |
1488 | /* |
1489 | * No socket path set. Weird error which means the constructor was not | |
1490 | * called. | |
1491 | */ | |
1492 | assert(0); | |
fac6795d DG |
1493 | } |
1494 | ||
2269e89e | 1495 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 MD |
1496 | if (ret < 0) { |
1497 | /* Not alive */ | |
1498 | return 0; | |
1499 | } | |
7d8234d9 | 1500 | |
947308c4 DG |
1501 | /* Is alive */ |
1502 | return 1; | |
fac6795d DG |
1503 | } |
1504 | ||
00e2e675 | 1505 | /* |
a4b92340 | 1506 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
1507 | * |
1508 | * Return 0 on success, else a negative value. | |
1509 | */ | |
a4b92340 DG |
1510 | int lttng_set_consumer_url(struct lttng_handle *handle, |
1511 | const char *control_url, const char *data_url) | |
00e2e675 | 1512 | { |
3dd05a85 | 1513 | int ret; |
a4b92340 | 1514 | ssize_t size; |
00e2e675 | 1515 | struct lttcomm_session_msg lsm; |
a4b92340 | 1516 | struct lttng_uri *uris = NULL; |
00e2e675 | 1517 | |
a4b92340 | 1518 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 1519 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1520 | } |
1521 | ||
a4b92340 DG |
1522 | memset(&lsm, 0, sizeof(lsm)); |
1523 | ||
00e2e675 DG |
1524 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
1525 | ||
cac3069d | 1526 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 1527 | sizeof(lsm.session.name)); |
cac3069d | 1528 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 1529 | |
bc894455 | 1530 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 1531 | if (size < 0) { |
2f70b271 | 1532 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
1533 | } |
1534 | ||
1535 | lsm.u.uri.size = size; | |
00e2e675 | 1536 | |
cac3069d DG |
1537 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1538 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1539 | |
1540 | free(uris); | |
1541 | return ret; | |
00e2e675 DG |
1542 | } |
1543 | ||
1544 | /* | |
9c6bda17 | 1545 | * [OBSOLETE] |
00e2e675 DG |
1546 | */ |
1547 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1548 | { | |
785d2d0d | 1549 | return -ENOSYS; |
00e2e675 DG |
1550 | } |
1551 | ||
1552 | /* | |
9c6bda17 | 1553 | * [OBSOLETE] |
00e2e675 DG |
1554 | */ |
1555 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1556 | { | |
785d2d0d | 1557 | return -ENOSYS; |
00e2e675 DG |
1558 | } |
1559 | ||
07424f16 DG |
1560 | /* |
1561 | * This is an extension of create session that is ONLY and SHOULD only be used | |
1562 | * by the lttng command line program. It exists to avoid using URI parsing in | |
1563 | * the lttng client. | |
1564 | * | |
1565 | * We need the date and time for the trace path subdirectory for the case where | |
1566 | * the user does NOT define one using either -o or -U. Using the normal | |
1567 | * lttng_create_session API call, we have no clue on the session daemon side if | |
1568 | * the URL was generated automatically by the client or define by the user. | |
1569 | * | |
1570 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
1571 | * string and appends it if necessary to the URI subdirectory before sending it | |
1572 | * to the session daemon. | |
1573 | * | |
1574 | * With this extra function, the lttng_create_session call behavior is not | |
1575 | * changed and the timestamp is appended to the URI on the session daemon side | |
1576 | * if necessary. | |
1577 | */ | |
1578 | int _lttng_create_session_ext(const char *name, const char *url, | |
1579 | const char *datetime) | |
1580 | { | |
3dd05a85 | 1581 | int ret; |
07424f16 DG |
1582 | ssize_t size; |
1583 | struct lttcomm_session_msg lsm; | |
1584 | struct lttng_uri *uris = NULL; | |
1585 | ||
2bba9e53 | 1586 | if (name == NULL || datetime == NULL) { |
2f70b271 | 1587 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
1588 | } |
1589 | ||
1590 | memset(&lsm, 0, sizeof(lsm)); | |
1591 | ||
1592 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 1593 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 DG |
1594 | |
1595 | /* There should never be a data URL */ | |
bc894455 | 1596 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 1597 | if (size < 0) { |
3dd05a85 DG |
1598 | ret = -LTTNG_ERR_INVALID; |
1599 | goto error; | |
07424f16 DG |
1600 | } |
1601 | ||
1602 | lsm.u.uri.size = size; | |
1603 | ||
4b35a6b3 | 1604 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
1605 | /* Don't append datetime if the name was automatically created. */ |
1606 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
1607 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
1608 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
1609 | name, datetime); | |
1610 | } else { | |
1611 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
1612 | } | |
07424f16 DG |
1613 | if (ret < 0) { |
1614 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
1615 | ret = -LTTNG_ERR_FATAL; |
1616 | goto error; | |
07424f16 DG |
1617 | } |
1618 | } | |
1619 | ||
cac3069d DG |
1620 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1621 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1622 | |
1623 | error: | |
1624 | free(uris); | |
1625 | return ret; | |
07424f16 DG |
1626 | } |
1627 | ||
806e2684 DG |
1628 | /* |
1629 | * For a given session name, this call checks if the data is ready to be read | |
1630 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
1631 | * any readers. | |
1632 | */ | |
6d805429 | 1633 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
1634 | { |
1635 | int ret; | |
1636 | struct lttcomm_session_msg lsm; | |
1637 | ||
1638 | if (session_name == NULL) { | |
1639 | return -LTTNG_ERR_INVALID; | |
1640 | } | |
1641 | ||
53efb85a | 1642 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 1643 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 1644 | |
cac3069d DG |
1645 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1646 | sizeof(lsm.session.name)); | |
806e2684 | 1647 | |
cac3069d | 1648 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
806e2684 DG |
1649 | |
1650 | /* | |
cac3069d DG |
1651 | * The lttng_ctl_ask_sessiond function negate the return code if it's not |
1652 | * LTTNG_OK so getting -1 means that the reply ret_code was 1 thus meaning | |
1653 | * that the data is available. Yes it is hackish but for now this is the | |
1654 | * only way. | |
806e2684 DG |
1655 | */ |
1656 | if (ret == -1) { | |
1657 | ret = 1; | |
1658 | } | |
1659 | ||
1660 | return ret; | |
1661 | } | |
1662 | ||
27babd3a DG |
1663 | /* |
1664 | * Create a session exclusively used for snapshot. | |
1665 | * | |
1666 | * Returns LTTNG_OK on success or a negative error code. | |
1667 | */ | |
1668 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1669 | { | |
1670 | int ret; | |
1671 | ssize_t size; | |
1672 | struct lttcomm_session_msg lsm; | |
1673 | struct lttng_uri *uris = NULL; | |
1674 | ||
1675 | if (name == NULL) { | |
1676 | return -LTTNG_ERR_INVALID; | |
1677 | } | |
1678 | ||
1679 | memset(&lsm, 0, sizeof(lsm)); | |
1680 | ||
1681 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
1682 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1683 | ||
1684 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1685 | if (size < 0) { | |
1686 | return -LTTNG_ERR_INVALID; | |
1687 | } | |
1688 | ||
1689 | lsm.u.uri.size = size; | |
1690 | ||
1691 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1692 | sizeof(struct lttng_uri) * size, NULL); | |
1693 | ||
1694 | free(uris); | |
1695 | return ret; | |
1696 | } | |
1697 | ||
ecc48a90 JD |
1698 | /* |
1699 | * Create a session exclusively used for live. | |
1700 | * | |
1701 | * Returns LTTNG_OK on success or a negative error code. | |
1702 | */ | |
1703 | int lttng_create_session_live(const char *name, const char *url, | |
1704 | unsigned int timer_interval) | |
1705 | { | |
1706 | int ret; | |
1707 | ssize_t size; | |
1708 | struct lttcomm_session_msg lsm; | |
1709 | struct lttng_uri *uris = NULL; | |
1710 | ||
1711 | if (name == NULL) { | |
1712 | return -LTTNG_ERR_INVALID; | |
1713 | } | |
1714 | ||
1715 | memset(&lsm, 0, sizeof(lsm)); | |
1716 | ||
1717 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
1718 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1719 | ||
1a241656 DG |
1720 | if (url) { |
1721 | size = uri_parse_str_urls(url, NULL, &uris); | |
1722 | if (size <= 0) { | |
1723 | ret = -LTTNG_ERR_INVALID; | |
1724 | goto end; | |
1725 | } | |
ecc48a90 | 1726 | |
1a241656 DG |
1727 | /* file:// is not accepted for live session. */ |
1728 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
1729 | ret = -LTTNG_ERR_INVALID; | |
1730 | goto end; | |
1731 | } | |
1732 | } else { | |
1733 | size = 0; | |
ecc48a90 JD |
1734 | } |
1735 | ||
1736 | lsm.u.session_live.nb_uri = size; | |
1737 | lsm.u.session_live.timer_interval = timer_interval; | |
1738 | ||
1739 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1740 | sizeof(struct lttng_uri) * size, NULL); | |
1741 | ||
1742 | end: | |
1743 | free(uris); | |
1744 | return ret; | |
1745 | } | |
1746 | ||
fac6795d DG |
1747 | /* |
1748 | * lib constructor | |
1749 | */ | |
1750 | static void __attribute__((constructor)) init() | |
1751 | { | |
1752 | /* Set default session group */ | |
bbccc3d2 | 1753 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 1754 | } |
49cca668 DG |
1755 | |
1756 | /* | |
1757 | * lib destructor | |
1758 | */ | |
1759 | static void __attribute__((destructor)) lttng_ctl_exit() | |
1760 | { | |
1761 | free(tracing_group); | |
1762 | } |