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: |
00e2e675 DG |
108 | memcpy(dst, src, sizeof(struct lttng_domain)); |
109 | break; | |
110 | default: | |
111 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 112 | break; |
cd80958d DG |
113 | } |
114 | } | |
115 | } | |
116 | ||
117 | /* | |
118 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 119 | * |
1c8d13c8 TD |
120 | * On success, returns the number of bytes sent (>=0) |
121 | * On error, returns -1 | |
fac6795d | 122 | */ |
cd80958d | 123 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
124 | { |
125 | int ret; | |
126 | ||
127 | if (!connected) { | |
2f70b271 | 128 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 129 | goto end; |
fac6795d DG |
130 | } |
131 | ||
a4b92340 DG |
132 | DBG("LSM cmd type : %d", lsm->cmd_type); |
133 | ||
be040666 | 134 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 135 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
136 | if (ret < 0) { |
137 | ret = -LTTNG_ERR_FATAL; | |
138 | } | |
e065084a DG |
139 | |
140 | end: | |
141 | return ret; | |
142 | } | |
143 | ||
53a80697 MD |
144 | /* |
145 | * Send var len data to the session daemon. | |
146 | * | |
147 | * On success, returns the number of bytes sent (>=0) | |
148 | * On error, returns -1 | |
149 | */ | |
150 | static int send_session_varlen(void *data, size_t len) | |
151 | { | |
152 | int ret; | |
153 | ||
154 | if (!connected) { | |
2f70b271 | 155 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
156 | goto end; |
157 | } | |
a4b92340 | 158 | |
53a80697 MD |
159 | if (!data || !len) { |
160 | ret = 0; | |
161 | goto end; | |
162 | } | |
163 | ||
164 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
165 | if (ret < 0) { |
166 | ret = -LTTNG_ERR_FATAL; | |
167 | } | |
53a80697 MD |
168 | |
169 | end: | |
170 | return ret; | |
171 | } | |
172 | ||
e065084a | 173 | /* |
cd80958d | 174 | * Receive data from the sessiond socket. |
e065084a | 175 | * |
1c8d13c8 TD |
176 | * On success, returns the number of bytes received (>=0) |
177 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 178 | */ |
ca95a216 | 179 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
180 | { |
181 | int ret; | |
182 | ||
183 | if (!connected) { | |
2f70b271 | 184 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 185 | goto end; |
fac6795d DG |
186 | } |
187 | ||
ca95a216 | 188 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
189 | if (ret < 0) { |
190 | ret = -LTTNG_ERR_FATAL; | |
191 | } | |
fac6795d | 192 | |
e065084a | 193 | end: |
fac6795d DG |
194 | return ret; |
195 | } | |
196 | ||
197 | /* | |
1c8d13c8 | 198 | * Check if we are in the specified group. |
65beb5ff | 199 | * |
2269e89e | 200 | * If yes return 1, else return -1. |
947308c4 | 201 | */ |
6c71277b MD |
202 | LTTNG_HIDDEN |
203 | int lttng_check_tracing_group(void) | |
947308c4 DG |
204 | { |
205 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
206 | gid_t *grp_list; | |
207 | int grp_list_size, grp_id, i; | |
208 | int ret = -1; | |
6c71277b | 209 | const char *grp_name = tracing_group; |
947308c4 DG |
210 | |
211 | /* Get GID of group 'tracing' */ | |
212 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
213 | if (!grp_tracing) { |
214 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
215 | goto end; |
216 | } | |
217 | ||
218 | /* Get number of supplementary group IDs */ | |
219 | grp_list_size = getgroups(0, NULL); | |
220 | if (grp_list_size < 0) { | |
221 | perror("getgroups"); | |
222 | goto end; | |
223 | } | |
224 | ||
225 | /* Alloc group list of the right size */ | |
226 | grp_list = malloc(grp_list_size * sizeof(gid_t)); | |
00795392 | 227 | if (!grp_list) { |
1c8d13c8 | 228 | perror("malloc"); |
00795392 MD |
229 | goto end; |
230 | } | |
947308c4 | 231 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 232 | if (grp_id < 0) { |
947308c4 DG |
233 | perror("getgroups"); |
234 | goto free_list; | |
235 | } | |
236 | ||
237 | for (i = 0; i < grp_list_size; i++) { | |
238 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 239 | ret = 1; |
947308c4 DG |
240 | break; |
241 | } | |
242 | } | |
243 | ||
244 | free_list: | |
245 | free(grp_list); | |
246 | ||
247 | end: | |
248 | return ret; | |
249 | } | |
250 | ||
251 | /* | |
2269e89e DG |
252 | * Try connect to session daemon with sock_path. |
253 | * | |
254 | * Return 0 on success, else -1 | |
255 | */ | |
256 | static int try_connect_sessiond(const char *sock_path) | |
257 | { | |
258 | int ret; | |
259 | ||
260 | /* If socket exist, we check if the daemon listens for connect. */ | |
261 | ret = access(sock_path, F_OK); | |
262 | if (ret < 0) { | |
263 | /* Not alive */ | |
2f70b271 | 264 | goto error; |
2269e89e DG |
265 | } |
266 | ||
267 | ret = lttcomm_connect_unix_sock(sock_path); | |
268 | if (ret < 0) { | |
269 | /* Not alive */ | |
2f70b271 | 270 | goto error; |
2269e89e DG |
271 | } |
272 | ||
273 | ret = lttcomm_close_unix_sock(ret); | |
274 | if (ret < 0) { | |
275 | perror("lttcomm_close_unix_sock"); | |
276 | } | |
277 | ||
278 | return 0; | |
2f70b271 DG |
279 | |
280 | error: | |
281 | return -1; | |
2269e89e DG |
282 | } |
283 | ||
284 | /* | |
2f70b271 DG |
285 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
286 | * variable. | |
287 | * | |
288 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
289 | * is somehow too long or ENOMEM). | |
947308c4 DG |
290 | */ |
291 | static int set_session_daemon_path(void) | |
292 | { | |
2269e89e DG |
293 | int in_tgroup = 0; /* In tracing group */ |
294 | uid_t uid; | |
295 | ||
296 | uid = getuid(); | |
947308c4 | 297 | |
2269e89e DG |
298 | if (uid != 0) { |
299 | /* Are we in the tracing group ? */ | |
6c71277b | 300 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
301 | } |
302 | ||
08a9c49f | 303 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
304 | lttng_ctl_copy_string(sessiond_sock_path, |
305 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 306 | } |
2269e89e | 307 | |
08a9c49f | 308 | if (uid != 0) { |
c617c0c6 MD |
309 | int ret; |
310 | ||
08a9c49f TD |
311 | if (in_tgroup) { |
312 | /* Tracing group */ | |
313 | ret = try_connect_sessiond(sessiond_sock_path); | |
314 | if (ret >= 0) { | |
315 | goto end; | |
2269e89e | 316 | } |
08a9c49f | 317 | /* Global session daemon not available... */ |
2269e89e | 318 | } |
08a9c49f TD |
319 | /* ...or not in tracing group (and not root), default */ |
320 | ||
321 | /* | |
322 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
323 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
324 | */ | |
325 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 326 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 327 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 328 | goto error; |
947308c4 | 329 | } |
947308c4 | 330 | } |
08a9c49f | 331 | end: |
947308c4 | 332 | return 0; |
2f70b271 DG |
333 | |
334 | error: | |
335 | return -1; | |
947308c4 DG |
336 | } |
337 | ||
65beb5ff DG |
338 | /* |
339 | * Connect to the LTTng session daemon. | |
340 | * | |
341 | * On success, return 0. On error, return -1. | |
342 | */ | |
343 | static int connect_sessiond(void) | |
344 | { | |
345 | int ret; | |
346 | ||
da3c9ec1 DG |
347 | /* Don't try to connect if already connected. */ |
348 | if (connected) { | |
349 | return 0; | |
350 | } | |
351 | ||
65beb5ff DG |
352 | ret = set_session_daemon_path(); |
353 | if (ret < 0) { | |
2f70b271 | 354 | goto error; |
65beb5ff DG |
355 | } |
356 | ||
357 | /* Connect to the sesssion daemon */ | |
358 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); | |
359 | if (ret < 0) { | |
2f70b271 | 360 | goto error; |
65beb5ff DG |
361 | } |
362 | ||
363 | sessiond_socket = ret; | |
364 | connected = 1; | |
365 | ||
366 | return 0; | |
2f70b271 DG |
367 | |
368 | error: | |
369 | return -1; | |
65beb5ff DG |
370 | } |
371 | ||
372 | /* | |
1c8d13c8 TD |
373 | * Clean disconnect from the session daemon. |
374 | * On success, return 0. On error, return -1. | |
65beb5ff DG |
375 | */ |
376 | static int disconnect_sessiond(void) | |
377 | { | |
378 | int ret = 0; | |
379 | ||
380 | if (connected) { | |
381 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
382 | sessiond_socket = 0; | |
383 | connected = 0; | |
384 | } | |
385 | ||
386 | return ret; | |
387 | } | |
388 | ||
35a6fdb7 | 389 | /* |
cd80958d | 390 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 391 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 392 | * |
af87c45a | 393 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 394 | */ |
cac3069d DG |
395 | LTTNG_HIDDEN |
396 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
a4b92340 | 397 | void *vardata, size_t varlen, void **buf) |
65beb5ff DG |
398 | { |
399 | int ret; | |
400 | size_t size; | |
401 | void *data = NULL; | |
cd80958d | 402 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
403 | |
404 | ret = connect_sessiond(); | |
405 | if (ret < 0) { | |
2f70b271 | 406 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
407 | goto end; |
408 | } | |
409 | ||
65beb5ff | 410 | /* Send command to session daemon */ |
cd80958d | 411 | ret = send_session_msg(lsm); |
65beb5ff | 412 | if (ret < 0) { |
2f70b271 | 413 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
414 | goto end; |
415 | } | |
53a80697 MD |
416 | /* Send var len data */ |
417 | ret = send_session_varlen(vardata, varlen); | |
418 | if (ret < 0) { | |
2f70b271 | 419 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
420 | goto end; |
421 | } | |
65beb5ff DG |
422 | |
423 | /* Get header from data transmission */ | |
424 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
425 | if (ret < 0) { | |
2f70b271 | 426 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
427 | goto end; |
428 | } | |
429 | ||
430 | /* Check error code if OK */ | |
f73fabfd | 431 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
432 | ret = -llm.ret_code; |
433 | goto end; | |
434 | } | |
435 | ||
436 | size = llm.data_size; | |
437 | if (size == 0) { | |
874d3f84 | 438 | /* If client free with size 0 */ |
a45d5536 DG |
439 | if (buf != NULL) { |
440 | *buf = NULL; | |
441 | } | |
7d29a247 | 442 | ret = 0; |
65beb5ff DG |
443 | goto end; |
444 | } | |
445 | ||
446 | data = (void*) malloc(size); | |
447 | ||
448 | /* Get payload data */ | |
449 | ret = recv_data_sessiond(data, size); | |
450 | if (ret < 0) { | |
451 | free(data); | |
452 | goto end; | |
453 | } | |
454 | ||
83009e5e DG |
455 | /* |
456 | * Extra protection not to dereference a NULL pointer. If buf is NULL at | |
457 | * this point, an error is returned and data is freed. | |
458 | */ | |
459 | if (buf == NULL) { | |
2f70b271 | 460 | ret = -LTTNG_ERR_INVALID; |
83009e5e DG |
461 | free(data); |
462 | goto end; | |
463 | } | |
464 | ||
65beb5ff DG |
465 | *buf = data; |
466 | ret = size; | |
467 | ||
468 | end: | |
469 | disconnect_sessiond(); | |
470 | return ret; | |
471 | } | |
472 | ||
9f19cc17 | 473 | /* |
cd80958d | 474 | * Create lttng handle and return pointer. |
1c8d13c8 | 475 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 476 | */ |
cd80958d DG |
477 | struct lttng_handle *lttng_create_handle(const char *session_name, |
478 | struct lttng_domain *domain) | |
9f19cc17 | 479 | { |
2f70b271 DG |
480 | struct lttng_handle *handle = NULL; |
481 | ||
482 | if (domain == NULL) { | |
483 | goto end; | |
484 | } | |
cd80958d DG |
485 | |
486 | handle = malloc(sizeof(struct lttng_handle)); | |
487 | if (handle == NULL) { | |
2f70b271 | 488 | PERROR("malloc handle"); |
cd80958d DG |
489 | goto end; |
490 | } | |
491 | ||
492 | /* Copy session name */ | |
cac3069d | 493 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
494 | sizeof(handle->session_name)); |
495 | ||
496 | /* Copy lttng domain */ | |
cac3069d | 497 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); |
cd80958d DG |
498 | |
499 | end: | |
500 | return handle; | |
501 | } | |
502 | ||
503 | /* | |
504 | * Destroy handle by free(3) the pointer. | |
505 | */ | |
506 | void lttng_destroy_handle(struct lttng_handle *handle) | |
507 | { | |
0e428499 | 508 | free(handle); |
eb354453 DG |
509 | } |
510 | ||
d9800920 DG |
511 | /* |
512 | * Register an outside consumer. | |
1c8d13c8 | 513 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
514 | */ |
515 | int lttng_register_consumer(struct lttng_handle *handle, | |
516 | const char *socket_path) | |
517 | { | |
518 | struct lttcomm_session_msg lsm; | |
519 | ||
2f70b271 DG |
520 | if (handle == NULL || socket_path == NULL) { |
521 | return -LTTNG_ERR_INVALID; | |
522 | } | |
523 | ||
53efb85a | 524 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 525 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 526 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 527 | sizeof(lsm.session.name)); |
cac3069d | 528 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 529 | |
cac3069d | 530 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
d9800920 | 531 | |
cac3069d | 532 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
533 | } |
534 | ||
1df4dedd | 535 | /* |
1c8d13c8 TD |
536 | * Start tracing for all traces of the session. |
537 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 538 | */ |
6a4f824d | 539 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 540 | { |
cd80958d DG |
541 | struct lttcomm_session_msg lsm; |
542 | ||
6a4f824d | 543 | if (session_name == NULL) { |
2f70b271 | 544 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
545 | } |
546 | ||
53efb85a | 547 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 548 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 549 | |
cac3069d DG |
550 | lttng_ctl_copy_string(lsm.session.name, session_name, |
551 | sizeof(lsm.session.name)); | |
cd80958d | 552 | |
cac3069d | 553 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 554 | } |
1df4dedd DG |
555 | |
556 | /* | |
38ee087f | 557 | * Stop tracing for all traces of the session. |
f3ed775e | 558 | */ |
38ee087f | 559 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 560 | { |
38ee087f | 561 | int ret, data_ret; |
cd80958d DG |
562 | struct lttcomm_session_msg lsm; |
563 | ||
6a4f824d | 564 | if (session_name == NULL) { |
2f70b271 | 565 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
566 | } |
567 | ||
53efb85a | 568 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 569 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 570 | |
cac3069d DG |
571 | lttng_ctl_copy_string(lsm.session.name, session_name, |
572 | sizeof(lsm.session.name)); | |
cd80958d | 573 | |
cac3069d | 574 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
575 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
576 | goto error; | |
577 | } | |
578 | ||
579 | if (!wait) { | |
580 | goto end; | |
581 | } | |
582 | ||
38ee087f DG |
583 | /* Check for data availability */ |
584 | do { | |
6d805429 | 585 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
586 | if (data_ret < 0) { |
587 | /* Return the data available call error. */ | |
588 | ret = data_ret; | |
589 | goto error; | |
590 | } | |
591 | ||
592 | /* | |
593 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
594 | * returned value indicates availability. | |
595 | */ | |
6d805429 | 596 | if (data_ret) { |
38ee087f | 597 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 598 | } |
6d805429 | 599 | } while (data_ret != 0); |
38ee087f | 600 | |
38ee087f DG |
601 | end: |
602 | error: | |
603 | return ret; | |
604 | } | |
605 | ||
606 | /* | |
607 | * Stop tracing and wait for data availability. | |
608 | */ | |
609 | int lttng_stop_tracing(const char *session_name) | |
610 | { | |
611 | return _lttng_stop_tracing(session_name, 1); | |
612 | } | |
613 | ||
614 | /* | |
615 | * Stop tracing but _don't_ wait for data availability. | |
616 | */ | |
617 | int lttng_stop_tracing_no_wait(const char *session_name) | |
618 | { | |
619 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
620 | } |
621 | ||
622 | /* | |
601d5acf DG |
623 | * Add context to a channel. |
624 | * | |
625 | * If the given channel is NULL, add the contexts to all channels. | |
626 | * The event_name param is ignored. | |
af87c45a DG |
627 | * |
628 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 629 | */ |
cd80958d | 630 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
631 | struct lttng_event_context *ctx, const char *event_name, |
632 | const char *channel_name) | |
d65106b1 | 633 | { |
cd80958d DG |
634 | struct lttcomm_session_msg lsm; |
635 | ||
9d697d3d DG |
636 | /* Safety check. Both are mandatory */ |
637 | if (handle == NULL || ctx == NULL) { | |
2f70b271 | 638 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
639 | } |
640 | ||
441c16a7 MD |
641 | memset(&lsm, 0, sizeof(lsm)); |
642 | ||
cd80958d DG |
643 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
644 | ||
85076754 MD |
645 | /* If no channel name, send empty string. */ |
646 | if (channel_name == NULL) { | |
647 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
648 | sizeof(lsm.u.context.channel_name)); | |
649 | } else { | |
650 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
651 | sizeof(lsm.u.context.channel_name)); | |
652 | } | |
cd80958d | 653 | |
cac3069d | 654 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d65106b1 | 655 | |
9d697d3d | 656 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); |
d65106b1 | 657 | |
cac3069d | 658 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
659 | sizeof(lsm.session.name)); |
660 | ||
cac3069d | 661 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d65106b1 DG |
662 | } |
663 | ||
f3ed775e | 664 | /* |
1c8d13c8 TD |
665 | * Enable event(s) for a channel. |
666 | * If no event name is specified, all events are enabled. | |
667 | * If no channel name is specified, the default 'channel0' is used. | |
668 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 669 | */ |
cd80958d | 670 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 671 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 672 | { |
f8a96544 JI |
673 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
674 | NULL, 0, NULL); | |
1df4dedd DG |
675 | } |
676 | ||
53a80697 | 677 | /* |
025faf73 | 678 | * Create or enable an event with a filter expression. |
178191b3 | 679 | * |
53a80697 MD |
680 | * Return negative error value on error. |
681 | * Return size of returned session payload data if OK. | |
682 | */ | |
025faf73 | 683 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 684 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
685 | const char *filter_expression) |
686 | { | |
f8a96544 JI |
687 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
688 | filter_expression, 0, NULL); | |
53a80697 MD |
689 | } |
690 | ||
347c5ab5 DG |
691 | /* |
692 | * Depending on the event, return a newly allocated JUL filter expression or | |
693 | * NULL if not applicable. | |
694 | * | |
695 | * An event with NO loglevel and the name is * will return NULL. | |
696 | */ | |
697 | static char *set_jul_filter(const char *filter, struct lttng_event *ev) | |
698 | { | |
699 | int err; | |
700 | char *jul_filter = NULL; | |
701 | ||
702 | assert(ev); | |
703 | ||
704 | /* Don't add filter for the '*' event. */ | |
705 | if (ev->name[0] != '*') { | |
706 | if (filter) { | |
707 | err = asprintf(&jul_filter, "%s && logger_name == \"%s\"", filter, | |
708 | ev->name); | |
709 | } else { | |
710 | err = asprintf(&jul_filter, "logger_name == \"%s\"", ev->name); | |
711 | } | |
712 | if (err < 0) { | |
713 | PERROR("asprintf"); | |
6a556f7b | 714 | goto error; |
347c5ab5 DG |
715 | } |
716 | } | |
717 | ||
718 | /* Add loglevel filtering if any for the JUL domain. */ | |
719 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
720 | char *op; | |
721 | ||
722 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
723 | op = ">="; | |
724 | } else { | |
725 | op = "=="; | |
726 | } | |
727 | ||
6a556f7b JG |
728 | if (filter || jul_filter) { |
729 | char *new_filter; | |
730 | ||
731 | err = asprintf(&new_filter, "%s && int_loglevel %s %d", | |
732 | jul_filter ? jul_filter : filter, op, | |
347c5ab5 | 733 | ev->loglevel); |
6a556f7b JG |
734 | if (jul_filter) { |
735 | free(jul_filter); | |
736 | } | |
737 | jul_filter = new_filter; | |
347c5ab5 DG |
738 | } else { |
739 | err = asprintf(&jul_filter, "int_loglevel %s %d", op, | |
740 | ev->loglevel); | |
741 | } | |
742 | if (err < 0) { | |
743 | PERROR("asprintf"); | |
6a556f7b | 744 | goto error; |
347c5ab5 DG |
745 | } |
746 | } | |
747 | ||
347c5ab5 | 748 | return jul_filter; |
6a556f7b JG |
749 | error: |
750 | free(jul_filter); | |
751 | return NULL; | |
347c5ab5 DG |
752 | } |
753 | ||
137b9942 DG |
754 | /* |
755 | * Generate the filter bytecode from a give filter expression string. Put the | |
756 | * newly allocated parser context in ctxp and populate the lsm object with the | |
757 | * expression len. | |
758 | * | |
759 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
760 | */ | |
761 | static int generate_filter(char *filter_expression, | |
762 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
763 | { | |
764 | int ret; | |
765 | struct filter_parser_ctx *ctx = NULL; | |
766 | FILE *fmem = NULL; | |
767 | ||
768 | assert(filter_expression); | |
769 | assert(lsm); | |
770 | assert(ctxp); | |
771 | ||
772 | /* | |
773 | * Casting const to non-const, as the underlying function will use it in | |
774 | * read-only mode. | |
775 | */ | |
776 | fmem = lttng_fmemopen((void *) filter_expression, | |
777 | strlen(filter_expression), "r"); | |
778 | if (!fmem) { | |
779 | fprintf(stderr, "Error opening memory as stream\n"); | |
780 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
781 | goto error; | |
782 | } | |
783 | ctx = filter_parser_ctx_alloc(fmem); | |
784 | if (!ctx) { | |
785 | fprintf(stderr, "Error allocating parser\n"); | |
786 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
787 | goto filter_alloc_error; | |
788 | } | |
789 | ret = filter_parser_ctx_append_ast(ctx); | |
790 | if (ret) { | |
791 | fprintf(stderr, "Parse error\n"); | |
792 | ret = -LTTNG_ERR_FILTER_INVAL; | |
793 | goto parse_error; | |
794 | } | |
795 | ret = filter_visitor_set_parent(ctx); | |
796 | if (ret) { | |
797 | fprintf(stderr, "Set parent error\n"); | |
798 | ret = -LTTNG_ERR_FILTER_INVAL; | |
799 | goto parse_error; | |
800 | } | |
801 | if (print_xml) { | |
802 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
803 | if (ret) { | |
804 | fflush(stdout); | |
805 | fprintf(stderr, "XML print error\n"); | |
806 | ret = -LTTNG_ERR_FILTER_INVAL; | |
807 | goto parse_error; | |
808 | } | |
809 | } | |
810 | ||
811 | dbg_printf("Generating IR... "); | |
812 | fflush(stdout); | |
813 | ret = filter_visitor_ir_generate(ctx); | |
814 | if (ret) { | |
815 | fprintf(stderr, "Generate IR error\n"); | |
816 | ret = -LTTNG_ERR_FILTER_INVAL; | |
817 | goto parse_error; | |
818 | } | |
819 | dbg_printf("done\n"); | |
820 | ||
821 | dbg_printf("Validating IR... "); | |
822 | fflush(stdout); | |
823 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
824 | if (ret) { | |
825 | ret = -LTTNG_ERR_FILTER_INVAL; | |
826 | goto parse_error; | |
827 | } | |
dcd5daf2 JG |
828 | /* Validate strings used as literals in the expression */ |
829 | ret = filter_visitor_ir_validate_string(ctx); | |
830 | if (ret) { | |
831 | ret = -LTTNG_ERR_FILTER_INVAL; | |
832 | goto parse_error; | |
833 | } | |
137b9942 DG |
834 | dbg_printf("done\n"); |
835 | ||
836 | dbg_printf("Generating bytecode... "); | |
837 | fflush(stdout); | |
838 | ret = filter_visitor_bytecode_generate(ctx); | |
839 | if (ret) { | |
840 | fprintf(stderr, "Generate bytecode error\n"); | |
841 | ret = -LTTNG_ERR_FILTER_INVAL; | |
842 | goto parse_error; | |
843 | } | |
844 | dbg_printf("done\n"); | |
845 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
846 | bytecode_get_len(&ctx->bytecode->b)); | |
847 | ||
848 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
849 | + bytecode_get_len(&ctx->bytecode->b); | |
850 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
851 | ||
852 | /* No need to keep the memory stream. */ | |
853 | if (fclose(fmem) != 0) { | |
854 | perror("fclose"); | |
855 | } | |
856 | ||
857 | *ctxp = ctx; | |
858 | return 0; | |
859 | ||
860 | parse_error: | |
137b9942 DG |
861 | filter_ir_free(ctx); |
862 | filter_parser_ctx_free(ctx); | |
863 | filter_alloc_error: | |
864 | if (fclose(fmem) != 0) { | |
865 | perror("fclose"); | |
866 | } | |
867 | error: | |
868 | return ret; | |
869 | } | |
870 | ||
93deb080 JI |
871 | /* |
872 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
873 | * If no event name is specified, all events are enabled. | |
874 | * If no channel name is specified, the default name is used. | |
875 | * If filter expression is not NULL, the filter is set for the event. | |
876 | * If exclusion count is not zero, the exclusions are set for the event. | |
877 | * Returns size of returned session payload data or a negative error code. | |
878 | */ | |
879 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
880 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 881 | const char *original_filter_expression, |
93deb080 JI |
882 | int exclusion_count, char **exclusion_list) |
883 | { | |
884 | struct lttcomm_session_msg lsm; | |
64226865 | 885 | char *varlen_data; |
93deb080 | 886 | int ret = 0; |
137b9942 | 887 | unsigned int free_filter_expression = 0; |
93deb080 | 888 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
889 | /* |
890 | * Cast as non-const since we may replace the filter expression | |
891 | * by a dynamically allocated string. Otherwise, the original | |
892 | * string is not modified. | |
893 | */ | |
894 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
895 | |
896 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
897 | ret = -LTTNG_ERR_INVALID; |
898 | goto error; | |
93deb080 JI |
899 | } |
900 | ||
901 | /* Empty filter string will always be rejected by the parser | |
902 | * anyway, so treat this corner-case early to eliminate | |
903 | * lttng_fmemopen error for 0-byte allocation. | |
904 | */ | |
905 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
906 | ret = -LTTNG_ERR_INVALID; |
907 | goto error; | |
93deb080 JI |
908 | } |
909 | ||
910 | memset(&lsm, 0, sizeof(lsm)); | |
911 | ||
912 | /* If no channel name, send empty string. */ | |
913 | if (channel_name == NULL) { | |
914 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
915 | sizeof(lsm.u.enable.channel_name)); | |
916 | } else { | |
917 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
918 | sizeof(lsm.u.enable.channel_name)); | |
919 | } | |
920 | ||
6565421f DG |
921 | if (ev->name[0] != '\0') { |
922 | lsm.cmd_type = LTTNG_ENABLE_EVENT; | |
923 | } else { | |
924 | lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT; | |
925 | } | |
93deb080 | 926 | |
6565421f | 927 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
93deb080 JI |
928 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
929 | ||
930 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
931 | sizeof(lsm.session.name)); | |
932 | lsm.u.enable.exclusion_count = exclusion_count; | |
933 | lsm.u.enable.bytecode_len = 0; | |
934 | ||
9b21e6d5 DG |
935 | /* |
936 | * For the JUL domain, a filter is enforced except for the enable all | |
937 | * event. This is done to avoid having the event in all sessions thus | |
938 | * filtering by logger name. | |
939 | */ | |
940 | if (exclusion_count == 0 && filter_expression == NULL && | |
3e1c9ff7 DG |
941 | handle->domain.type != LTTNG_DOMAIN_JUL) { |
942 | goto ask_sessiond; | |
93deb080 JI |
943 | } |
944 | ||
945 | /* | |
946 | * We have either a filter or some exclusions, so we need to set up | |
947 | * a variable-length memory block from where to send the data | |
948 | */ | |
949 | ||
950 | /* Parse filter expression */ | |
3e1c9ff7 | 951 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL) { |
9b21e6d5 | 952 | if (handle->domain.type == LTTNG_DOMAIN_JUL) { |
64226865 DG |
953 | char *jul_filter; |
954 | ||
347c5ab5 | 955 | /* Setup JUL filter if needed. */ |
64226865 | 956 | jul_filter = set_jul_filter(filter_expression, ev); |
137b9942 DG |
957 | if (!jul_filter) { |
958 | if (!filter_expression) { | |
959 | /* No JUL and no filter, just skip everything below. */ | |
960 | goto ask_sessiond; | |
961 | } | |
64226865 DG |
962 | } else { |
963 | /* | |
964 | * With a JUL filter, the original filter has been added to it | |
965 | * thus replace the filter expression. | |
966 | */ | |
e9efbcd3 JG |
967 | filter_expression = jul_filter; |
968 | free_filter_expression = 1; | |
9b21e6d5 | 969 | } |
9b21e6d5 | 970 | } |
93deb080 | 971 | |
137b9942 | 972 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 973 | if (ret) { |
137b9942 | 974 | goto filter_error; |
93deb080 | 975 | } |
6b453b5e JG |
976 | } |
977 | ||
978 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
979 | + lsm.u.enable.expression_len |
980 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
981 | if (!varlen_data) { |
982 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 983 | goto mem_error; |
6b453b5e | 984 | } |
137b9942 | 985 | |
6b453b5e JG |
986 | /* Put exclusion names first in the data */ |
987 | while (exclusion_count--) { | |
988 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
137b9942 | 989 | *(exclusion_list + exclusion_count), LTTNG_SYMBOL_NAME_LEN); |
6b453b5e JG |
990 | } |
991 | /* Add filter expression next */ | |
992 | if (lsm.u.enable.expression_len != 0) { | |
993 | memcpy(varlen_data | |
994 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
995 | filter_expression, | |
996 | lsm.u.enable.expression_len); | |
997 | } | |
998 | /* Add filter bytecode next */ | |
137b9942 | 999 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1000 | memcpy(varlen_data |
1001 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1002 | + lsm.u.enable.expression_len, | |
1003 | &ctx->bytecode->b, | |
1004 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1005 | } |
1006 | ||
1007 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data, | |
67676bd8 | 1008 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
137b9942 | 1009 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, NULL); |
6b453b5e | 1010 | free(varlen_data); |
93deb080 | 1011 | |
7ca1dc6f DG |
1012 | mem_error: |
1013 | if (filter_expression && ctx) { | |
93deb080 JI |
1014 | filter_bytecode_free(ctx); |
1015 | filter_ir_free(ctx); | |
1016 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1017 | } |
1018 | filter_error: | |
1019 | if (free_filter_expression) { | |
1020 | /* | |
1021 | * The filter expression has been replaced and must be freed as it is | |
1022 | * not the original filter expression received as a parameter. | |
1023 | */ | |
1024 | free(filter_expression); | |
93deb080 | 1025 | } |
137b9942 DG |
1026 | error: |
1027 | /* | |
1028 | * Return directly to the caller and don't ask the sessiond since something | |
1029 | * went wrong in the parsing of data above. | |
1030 | */ | |
93deb080 | 1031 | return ret; |
3e1c9ff7 DG |
1032 | |
1033 | ask_sessiond: | |
1034 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1035 | return ret; | |
93deb080 JI |
1036 | } |
1037 | ||
1df4dedd | 1038 | /* |
1c8d13c8 TD |
1039 | * Disable event(s) of a channel and domain. |
1040 | * If no event name is specified, all events are disabled. | |
1041 | * If no channel name is specified, the default 'channel0' is used. | |
1042 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 1043 | */ |
cd80958d | 1044 | int lttng_disable_event(struct lttng_handle *handle, const char *name, |
38057ed1 | 1045 | const char *channel_name) |
1df4dedd | 1046 | { |
cd80958d | 1047 | struct lttcomm_session_msg lsm; |
1df4dedd | 1048 | |
9d697d3d | 1049 | if (handle == NULL) { |
2f70b271 | 1050 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1051 | } |
1052 | ||
441c16a7 MD |
1053 | memset(&lsm, 0, sizeof(lsm)); |
1054 | ||
85076754 MD |
1055 | /* If no channel name, send empty string. */ |
1056 | if (channel_name == NULL) { | |
1057 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1058 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1059 | } else { |
85076754 | 1060 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1061 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1062 | } |
1063 | ||
cac3069d | 1064 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f5177a38 | 1065 | |
f84efadf | 1066 | if (name != NULL) { |
cac3069d DG |
1067 | lttng_ctl_copy_string(lsm.u.disable.name, name, |
1068 | sizeof(lsm.u.disable.name)); | |
cd80958d | 1069 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f5177a38 | 1070 | } else { |
cd80958d | 1071 | lsm.cmd_type = LTTNG_DISABLE_ALL_EVENT; |
f3ed775e DG |
1072 | } |
1073 | ||
cac3069d | 1074 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1075 | sizeof(lsm.session.name)); |
1076 | ||
cac3069d | 1077 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
1df4dedd DG |
1078 | } |
1079 | ||
1080 | /* | |
1c8d13c8 TD |
1081 | * Enable channel per domain |
1082 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1083 | */ |
cd80958d | 1084 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 1085 | struct lttng_channel *chan) |
a5c5a2bd | 1086 | { |
cd80958d DG |
1087 | struct lttcomm_session_msg lsm; |
1088 | ||
5117eeec DG |
1089 | /* |
1090 | * NULL arguments are forbidden. No default values. | |
1091 | */ | |
1092 | if (handle == NULL || chan == NULL) { | |
2f70b271 | 1093 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1094 | } |
1095 | ||
441c16a7 MD |
1096 | memset(&lsm, 0, sizeof(lsm)); |
1097 | ||
5117eeec | 1098 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 1099 | |
cd80958d DG |
1100 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
1101 | ||
cac3069d | 1102 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1103 | |
cac3069d | 1104 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1105 | sizeof(lsm.session.name)); |
1106 | ||
cac3069d | 1107 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1108 | } |
1df4dedd | 1109 | |
2ef84c95 | 1110 | /* |
1c8d13c8 TD |
1111 | * All tracing will be stopped for registered events of the channel. |
1112 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1113 | */ |
cd80958d | 1114 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1115 | { |
cd80958d DG |
1116 | struct lttcomm_session_msg lsm; |
1117 | ||
9d697d3d DG |
1118 | /* Safety check. Both are mandatory */ |
1119 | if (handle == NULL || name == NULL) { | |
2f70b271 | 1120 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1121 | } |
1122 | ||
441c16a7 MD |
1123 | memset(&lsm, 0, sizeof(lsm)); |
1124 | ||
cd80958d | 1125 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1126 | |
cac3069d | 1127 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1128 | sizeof(lsm.u.disable.channel_name)); |
1129 | ||
cac3069d | 1130 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1131 | |
cac3069d | 1132 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1133 | sizeof(lsm.session.name)); |
1134 | ||
cac3069d | 1135 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1136 | } |
1137 | ||
fac6795d | 1138 | /* |
1c8d13c8 TD |
1139 | * Lists all available tracepoints of domain. |
1140 | * Sets the contents of the events array. | |
1141 | * Returns the number of lttng_event entries in events; | |
1142 | * on error, returns a negative value. | |
fac6795d | 1143 | */ |
cd80958d | 1144 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1145 | struct lttng_event **events) |
fac6795d | 1146 | { |
052da939 | 1147 | int ret; |
cd80958d DG |
1148 | struct lttcomm_session_msg lsm; |
1149 | ||
9d697d3d | 1150 | if (handle == NULL) { |
2f70b271 | 1151 | return -LTTNG_ERR_INVALID; |
cd80958d | 1152 | } |
fac6795d | 1153 | |
53efb85a | 1154 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1155 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1156 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1157 | |
cac3069d | 1158 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1159 | if (ret < 0) { |
1160 | return ret; | |
eb354453 | 1161 | } |
fac6795d | 1162 | |
9f19cc17 | 1163 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1164 | } |
1165 | ||
f37d259d MD |
1166 | /* |
1167 | * Lists all available tracepoint fields of domain. | |
1168 | * Sets the contents of the event field array. | |
1169 | * Returns the number of lttng_event_field entries in events; | |
1170 | * on error, returns a negative value. | |
1171 | */ | |
1172 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1173 | struct lttng_event_field **fields) | |
1174 | { | |
1175 | int ret; | |
1176 | struct lttcomm_session_msg lsm; | |
1177 | ||
1178 | if (handle == NULL) { | |
2f70b271 | 1179 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1180 | } |
1181 | ||
53efb85a | 1182 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1183 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1184 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1185 | |
cac3069d | 1186 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1187 | if (ret < 0) { |
1188 | return ret; | |
1189 | } | |
1190 | ||
1191 | return ret / sizeof(struct lttng_event_field); | |
1192 | } | |
1193 | ||
1657e9bb | 1194 | /* |
1c8d13c8 TD |
1195 | * Returns a human readable string describing |
1196 | * the error code (a negative value). | |
1657e9bb | 1197 | */ |
9a745bc7 | 1198 | const char *lttng_strerror(int code) |
1657e9bb | 1199 | { |
f73fabfd | 1200 | return error_get_str(code); |
1657e9bb DG |
1201 | } |
1202 | ||
aaf97519 | 1203 | /* |
a4b92340 DG |
1204 | * Create a brand new session using name and url for destination. |
1205 | * | |
f73fabfd | 1206 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1207 | */ |
a4b92340 | 1208 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1209 | { |
3dd05a85 | 1210 | int ret; |
a4b92340 | 1211 | ssize_t size; |
00e2e675 | 1212 | struct lttcomm_session_msg lsm; |
a4b92340 | 1213 | struct lttng_uri *uris = NULL; |
00e2e675 | 1214 | |
a4b92340 | 1215 | if (name == NULL) { |
2f70b271 | 1216 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1217 | } |
1218 | ||
a4b92340 | 1219 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1220 | |
a4b92340 | 1221 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1222 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1223 | |
1224 | /* There should never be a data URL */ | |
bc894455 | 1225 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1226 | if (size < 0) { |
2f70b271 | 1227 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1228 | } |
1229 | ||
a4b92340 DG |
1230 | lsm.u.uri.size = size; |
1231 | ||
cac3069d DG |
1232 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1233 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1234 | |
1235 | free(uris); | |
1236 | return ret; | |
00e2e675 DG |
1237 | } |
1238 | ||
8028d920 | 1239 | /* |
8028d920 | 1240 | * Destroy session using name. |
1c8d13c8 | 1241 | * Returns size of returned session payload data or a negative error code. |
8028d920 | 1242 | */ |
843f5df9 | 1243 | int lttng_destroy_session(const char *session_name) |
8028d920 | 1244 | { |
cd80958d DG |
1245 | struct lttcomm_session_msg lsm; |
1246 | ||
843f5df9 | 1247 | if (session_name == NULL) { |
2f70b271 | 1248 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1249 | } |
1250 | ||
53efb85a | 1251 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1252 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1253 | |
cac3069d DG |
1254 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1255 | sizeof(lsm.session.name)); | |
cd80958d | 1256 | |
cac3069d | 1257 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1258 | } |
1259 | ||
57167058 | 1260 | /* |
57167058 | 1261 | * Ask the session daemon for all available sessions. |
1c8d13c8 TD |
1262 | * Sets the contents of the sessions array. |
1263 | * Returns the number of lttng_session entries in sessions; | |
1264 | * on error, returns a negative value. | |
57167058 | 1265 | */ |
ca95a216 | 1266 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1267 | { |
ca95a216 | 1268 | int ret; |
cd80958d | 1269 | struct lttcomm_session_msg lsm; |
57167058 | 1270 | |
53efb85a | 1271 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1272 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1273 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1274 | if (ret < 0) { |
ca95a216 | 1275 | return ret; |
57167058 DG |
1276 | } |
1277 | ||
ca95a216 | 1278 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1279 | } |
1280 | ||
9f19cc17 | 1281 | /* |
1c8d13c8 TD |
1282 | * Ask the session daemon for all available domains of a session. |
1283 | * Sets the contents of the domains array. | |
1284 | * Returns the number of lttng_domain entries in domains; | |
1285 | * on error, returns a negative value. | |
9f19cc17 | 1286 | */ |
330be774 | 1287 | int lttng_list_domains(const char *session_name, |
cd80958d | 1288 | struct lttng_domain **domains) |
9f19cc17 DG |
1289 | { |
1290 | int ret; | |
cd80958d DG |
1291 | struct lttcomm_session_msg lsm; |
1292 | ||
330be774 | 1293 | if (session_name == NULL) { |
2f70b271 | 1294 | return -LTTNG_ERR_INVALID; |
cd80958d | 1295 | } |
9f19cc17 | 1296 | |
53efb85a | 1297 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1298 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1299 | ||
cac3069d DG |
1300 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1301 | sizeof(lsm.session.name)); | |
cd80958d | 1302 | |
cac3069d | 1303 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1304 | if (ret < 0) { |
1305 | return ret; | |
1306 | } | |
1307 | ||
1308 | return ret / sizeof(struct lttng_domain); | |
1309 | } | |
1310 | ||
1311 | /* | |
1c8d13c8 TD |
1312 | * Ask the session daemon for all available channels of a session. |
1313 | * Sets the contents of the channels array. | |
1314 | * Returns the number of lttng_channel entries in channels; | |
1315 | * on error, returns a negative value. | |
9f19cc17 | 1316 | */ |
cd80958d DG |
1317 | int lttng_list_channels(struct lttng_handle *handle, |
1318 | struct lttng_channel **channels) | |
9f19cc17 DG |
1319 | { |
1320 | int ret; | |
cd80958d DG |
1321 | struct lttcomm_session_msg lsm; |
1322 | ||
9d697d3d | 1323 | if (handle == NULL) { |
2f70b271 | 1324 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1325 | } |
1326 | ||
53efb85a | 1327 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1328 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1329 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1330 | sizeof(lsm.session.name)); |
9f19cc17 | 1331 | |
cac3069d | 1332 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1333 | |
cac3069d | 1334 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1335 | if (ret < 0) { |
1336 | return ret; | |
1337 | } | |
1338 | ||
1339 | return ret / sizeof(struct lttng_channel); | |
1340 | } | |
1341 | ||
1342 | /* | |
1c8d13c8 TD |
1343 | * Ask the session daemon for all available events of a session channel. |
1344 | * Sets the contents of the events array. | |
1345 | * Returns the number of lttng_event entries in events; | |
1346 | * on error, returns a negative value. | |
9f19cc17 | 1347 | */ |
cd80958d DG |
1348 | int lttng_list_events(struct lttng_handle *handle, |
1349 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1350 | { |
1351 | int ret; | |
cd80958d | 1352 | struct lttcomm_session_msg lsm; |
9f19cc17 | 1353 | |
9d697d3d DG |
1354 | /* Safety check. An handle and channel name are mandatory */ |
1355 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1356 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1357 | } |
1358 | ||
53efb85a | 1359 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1360 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1361 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1362 | sizeof(lsm.session.name)); |
cac3069d | 1363 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d DG |
1364 | sizeof(lsm.u.list.channel_name)); |
1365 | ||
cac3069d | 1366 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1367 | |
cac3069d | 1368 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) events); |
9f19cc17 DG |
1369 | if (ret < 0) { |
1370 | return ret; | |
1371 | } | |
1372 | ||
1373 | return ret / sizeof(struct lttng_event); | |
1374 | } | |
1375 | ||
fac6795d | 1376 | /* |
1c8d13c8 TD |
1377 | * Sets the tracing_group variable with name. |
1378 | * This function allocates memory pointed to by tracing_group. | |
1379 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1380 | */ |
1381 | int lttng_set_tracing_group(const char *name) | |
1382 | { | |
9d697d3d | 1383 | if (name == NULL) { |
2f70b271 | 1384 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1385 | } |
1386 | ||
fac6795d | 1387 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1388 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1389 | } |
1390 | ||
1391 | return 0; | |
1392 | } | |
1393 | ||
d0254c7c | 1394 | /* |
af87c45a | 1395 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1396 | */ |
cd80958d | 1397 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1398 | struct lttng_calibrate *calibrate) |
1399 | { | |
cd80958d | 1400 | struct lttcomm_session_msg lsm; |
d0254c7c | 1401 | |
9d697d3d DG |
1402 | /* Safety check. NULL pointer are forbidden */ |
1403 | if (handle == NULL || calibrate == NULL) { | |
2f70b271 | 1404 | return -LTTNG_ERR_INVALID; |
cd80958d | 1405 | } |
d0254c7c | 1406 | |
53efb85a | 1407 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1408 | lsm.cmd_type = LTTNG_CALIBRATE; |
cac3069d | 1409 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d0254c7c | 1410 | |
cd80958d DG |
1411 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1412 | ||
cac3069d | 1413 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d0254c7c MD |
1414 | } |
1415 | ||
5edd7e09 DG |
1416 | /* |
1417 | * Set default channel attributes. | |
441c16a7 | 1418 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1419 | */ |
1420 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1421 | struct lttng_channel_attr *attr) | |
1422 | { | |
1423 | /* Safety check */ | |
1424 | if (attr == NULL || domain == NULL) { | |
1425 | return; | |
1426 | } | |
1427 | ||
eacaa7a6 DS |
1428 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1429 | ||
0a9c6494 DG |
1430 | /* Same for all domains. */ |
1431 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1432 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1433 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1434 | ||
5edd7e09 DG |
1435 | switch (domain->type) { |
1436 | case LTTNG_DOMAIN_KERNEL: | |
d92ff3ef DG |
1437 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
1438 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
3e230f92 | 1439 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1440 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1441 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1442 | break; | |
1443 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1444 | switch (domain->buf_type) { |
1445 | case LTTNG_BUFFER_PER_UID: | |
1446 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1447 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1448 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
1449 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1450 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
1451 | break; | |
1452 | case LTTNG_BUFFER_PER_PID: | |
1453 | default: | |
1454 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1455 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1456 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
1457 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1458 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
1459 | break; | |
1460 | } | |
5edd7e09 | 1461 | default: |
441c16a7 | 1462 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1463 | break; |
1464 | } | |
1465 | } | |
1466 | ||
fac6795d | 1467 | /* |
2269e89e | 1468 | * Check if session daemon is alive. |
fac6795d | 1469 | * |
2269e89e | 1470 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1471 | * On error returns a negative value. |
fac6795d | 1472 | */ |
947308c4 | 1473 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1474 | { |
1475 | int ret; | |
1476 | ||
1477 | ret = set_session_daemon_path(); | |
1478 | if (ret < 0) { | |
947308c4 | 1479 | /* Error */ |
fac6795d DG |
1480 | return ret; |
1481 | } | |
1482 | ||
9d035200 | 1483 | if (*sessiond_sock_path == '\0') { |
2f70b271 DG |
1484 | /* |
1485 | * No socket path set. Weird error which means the constructor was not | |
1486 | * called. | |
1487 | */ | |
1488 | assert(0); | |
fac6795d DG |
1489 | } |
1490 | ||
2269e89e | 1491 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 MD |
1492 | if (ret < 0) { |
1493 | /* Not alive */ | |
1494 | return 0; | |
1495 | } | |
7d8234d9 | 1496 | |
947308c4 DG |
1497 | /* Is alive */ |
1498 | return 1; | |
fac6795d DG |
1499 | } |
1500 | ||
00e2e675 | 1501 | /* |
a4b92340 | 1502 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
1503 | * |
1504 | * Return 0 on success, else a negative value. | |
1505 | */ | |
a4b92340 DG |
1506 | int lttng_set_consumer_url(struct lttng_handle *handle, |
1507 | const char *control_url, const char *data_url) | |
00e2e675 | 1508 | { |
3dd05a85 | 1509 | int ret; |
a4b92340 | 1510 | ssize_t size; |
00e2e675 | 1511 | struct lttcomm_session_msg lsm; |
a4b92340 | 1512 | struct lttng_uri *uris = NULL; |
00e2e675 | 1513 | |
a4b92340 | 1514 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 1515 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1516 | } |
1517 | ||
a4b92340 DG |
1518 | memset(&lsm, 0, sizeof(lsm)); |
1519 | ||
00e2e675 DG |
1520 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
1521 | ||
cac3069d | 1522 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 1523 | sizeof(lsm.session.name)); |
cac3069d | 1524 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 1525 | |
bc894455 | 1526 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 1527 | if (size < 0) { |
2f70b271 | 1528 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
1529 | } |
1530 | ||
1531 | lsm.u.uri.size = size; | |
00e2e675 | 1532 | |
cac3069d DG |
1533 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1534 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1535 | |
1536 | free(uris); | |
1537 | return ret; | |
00e2e675 DG |
1538 | } |
1539 | ||
1540 | /* | |
9c6bda17 | 1541 | * [OBSOLETE] |
00e2e675 DG |
1542 | */ |
1543 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1544 | { | |
785d2d0d | 1545 | return -ENOSYS; |
00e2e675 DG |
1546 | } |
1547 | ||
1548 | /* | |
9c6bda17 | 1549 | * [OBSOLETE] |
00e2e675 DG |
1550 | */ |
1551 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1552 | { | |
785d2d0d | 1553 | return -ENOSYS; |
00e2e675 DG |
1554 | } |
1555 | ||
07424f16 DG |
1556 | /* |
1557 | * This is an extension of create session that is ONLY and SHOULD only be used | |
1558 | * by the lttng command line program. It exists to avoid using URI parsing in | |
1559 | * the lttng client. | |
1560 | * | |
1561 | * We need the date and time for the trace path subdirectory for the case where | |
1562 | * the user does NOT define one using either -o or -U. Using the normal | |
1563 | * lttng_create_session API call, we have no clue on the session daemon side if | |
1564 | * the URL was generated automatically by the client or define by the user. | |
1565 | * | |
1566 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
1567 | * string and appends it if necessary to the URI subdirectory before sending it | |
1568 | * to the session daemon. | |
1569 | * | |
1570 | * With this extra function, the lttng_create_session call behavior is not | |
1571 | * changed and the timestamp is appended to the URI on the session daemon side | |
1572 | * if necessary. | |
1573 | */ | |
1574 | int _lttng_create_session_ext(const char *name, const char *url, | |
1575 | const char *datetime) | |
1576 | { | |
3dd05a85 | 1577 | int ret; |
07424f16 DG |
1578 | ssize_t size; |
1579 | struct lttcomm_session_msg lsm; | |
1580 | struct lttng_uri *uris = NULL; | |
1581 | ||
2bba9e53 | 1582 | if (name == NULL || datetime == NULL) { |
2f70b271 | 1583 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
1584 | } |
1585 | ||
1586 | memset(&lsm, 0, sizeof(lsm)); | |
1587 | ||
1588 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 1589 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 DG |
1590 | |
1591 | /* There should never be a data URL */ | |
bc894455 | 1592 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 1593 | if (size < 0) { |
3dd05a85 DG |
1594 | ret = -LTTNG_ERR_INVALID; |
1595 | goto error; | |
07424f16 DG |
1596 | } |
1597 | ||
1598 | lsm.u.uri.size = size; | |
1599 | ||
4b35a6b3 | 1600 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
1601 | /* Don't append datetime if the name was automatically created. */ |
1602 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
1603 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
1604 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
1605 | name, datetime); | |
1606 | } else { | |
1607 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
1608 | } | |
07424f16 DG |
1609 | if (ret < 0) { |
1610 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
1611 | ret = -LTTNG_ERR_FATAL; |
1612 | goto error; | |
07424f16 DG |
1613 | } |
1614 | } | |
1615 | ||
cac3069d DG |
1616 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1617 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1618 | |
1619 | error: | |
1620 | free(uris); | |
1621 | return ret; | |
07424f16 DG |
1622 | } |
1623 | ||
806e2684 DG |
1624 | /* |
1625 | * For a given session name, this call checks if the data is ready to be read | |
1626 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
1627 | * any readers. | |
1628 | */ | |
6d805429 | 1629 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
1630 | { |
1631 | int ret; | |
1632 | struct lttcomm_session_msg lsm; | |
1633 | ||
1634 | if (session_name == NULL) { | |
1635 | return -LTTNG_ERR_INVALID; | |
1636 | } | |
1637 | ||
53efb85a | 1638 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 1639 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 1640 | |
cac3069d DG |
1641 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1642 | sizeof(lsm.session.name)); | |
806e2684 | 1643 | |
cac3069d | 1644 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
806e2684 DG |
1645 | |
1646 | /* | |
cac3069d DG |
1647 | * The lttng_ctl_ask_sessiond function negate the return code if it's not |
1648 | * LTTNG_OK so getting -1 means that the reply ret_code was 1 thus meaning | |
1649 | * that the data is available. Yes it is hackish but for now this is the | |
1650 | * only way. | |
806e2684 DG |
1651 | */ |
1652 | if (ret == -1) { | |
1653 | ret = 1; | |
1654 | } | |
1655 | ||
1656 | return ret; | |
1657 | } | |
1658 | ||
27babd3a DG |
1659 | /* |
1660 | * Create a session exclusively used for snapshot. | |
1661 | * | |
1662 | * Returns LTTNG_OK on success or a negative error code. | |
1663 | */ | |
1664 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1665 | { | |
1666 | int ret; | |
1667 | ssize_t size; | |
1668 | struct lttcomm_session_msg lsm; | |
1669 | struct lttng_uri *uris = NULL; | |
1670 | ||
1671 | if (name == NULL) { | |
1672 | return -LTTNG_ERR_INVALID; | |
1673 | } | |
1674 | ||
1675 | memset(&lsm, 0, sizeof(lsm)); | |
1676 | ||
1677 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
1678 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1679 | ||
1680 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1681 | if (size < 0) { | |
1682 | return -LTTNG_ERR_INVALID; | |
1683 | } | |
1684 | ||
1685 | lsm.u.uri.size = size; | |
1686 | ||
1687 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1688 | sizeof(struct lttng_uri) * size, NULL); | |
1689 | ||
1690 | free(uris); | |
1691 | return ret; | |
1692 | } | |
1693 | ||
ecc48a90 JD |
1694 | /* |
1695 | * Create a session exclusively used for live. | |
1696 | * | |
1697 | * Returns LTTNG_OK on success or a negative error code. | |
1698 | */ | |
1699 | int lttng_create_session_live(const char *name, const char *url, | |
1700 | unsigned int timer_interval) | |
1701 | { | |
1702 | int ret; | |
1703 | ssize_t size; | |
1704 | struct lttcomm_session_msg lsm; | |
1705 | struct lttng_uri *uris = NULL; | |
1706 | ||
1707 | if (name == NULL) { | |
1708 | return -LTTNG_ERR_INVALID; | |
1709 | } | |
1710 | ||
1711 | memset(&lsm, 0, sizeof(lsm)); | |
1712 | ||
1713 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
1714 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1715 | ||
1a241656 DG |
1716 | if (url) { |
1717 | size = uri_parse_str_urls(url, NULL, &uris); | |
1718 | if (size <= 0) { | |
1719 | ret = -LTTNG_ERR_INVALID; | |
1720 | goto end; | |
1721 | } | |
ecc48a90 | 1722 | |
1a241656 DG |
1723 | /* file:// is not accepted for live session. */ |
1724 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
1725 | ret = -LTTNG_ERR_INVALID; | |
1726 | goto end; | |
1727 | } | |
1728 | } else { | |
1729 | size = 0; | |
ecc48a90 JD |
1730 | } |
1731 | ||
1732 | lsm.u.session_live.nb_uri = size; | |
1733 | lsm.u.session_live.timer_interval = timer_interval; | |
1734 | ||
1735 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1736 | sizeof(struct lttng_uri) * size, NULL); | |
1737 | ||
1738 | end: | |
1739 | free(uris); | |
1740 | return ret; | |
1741 | } | |
1742 | ||
fac6795d DG |
1743 | /* |
1744 | * lib constructor | |
1745 | */ | |
1746 | static void __attribute__((constructor)) init() | |
1747 | { | |
1748 | /* Set default session group */ | |
bbccc3d2 | 1749 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 1750 | } |
49cca668 DG |
1751 | |
1752 | /* | |
1753 | * lib destructor | |
1754 | */ | |
1755 | static void __attribute__((destructor)) lttng_ctl_exit() | |
1756 | { | |
1757 | free(tracing_group); | |
1758 | } |