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 | |
fac6795d | 23 | #include <grp.h> |
1e307fab | 24 | #include <errno.h> |
fac6795d DG |
25 | #include <stdio.h> |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <unistd.h> | |
29 | ||
990570ed DG |
30 | #include <common/common.h> |
31 | #include <common/defaults.h> | |
db758600 | 32 | #include <common/sessiond-comm/sessiond-comm.h> |
1e307fab | 33 | #include <lttng/lttng.h> |
fac6795d | 34 | |
53a80697 MD |
35 | #include "filter-parser.h" |
36 | #include "filter-ast.h" | |
37 | #include "filter-bytecode.h" | |
38 | #include "memstream.h" | |
39 | ||
40 | #ifdef DEBUG | |
41 | const int print_xml = 1; | |
42 | #define dbg_printf(fmt, args...) \ | |
43 | printf("[debug liblttng-ctl] " fmt, ## args) | |
44 | #else | |
45 | const int print_xml = 0; | |
46 | #define dbg_printf(fmt, args...) \ | |
47 | do { \ | |
48 | /* do nothing but check printf format */ \ | |
49 | if (0) \ | |
50 | printf("[debug liblttnctl] " fmt, ## args); \ | |
51 | } while (0) | |
52 | #endif | |
53 | ||
54 | ||
fac6795d DG |
55 | /* Socket to session daemon for communication */ |
56 | static int sessiond_socket; | |
57 | static char sessiond_sock_path[PATH_MAX]; | |
58 | ||
fac6795d DG |
59 | /* Variables */ |
60 | static char *tracing_group; | |
61 | static int connected; | |
62 | ||
97e19046 DG |
63 | /* Global */ |
64 | ||
65 | /* | |
66 | * Those two variables are used by error.h to silent or control the verbosity of | |
67 | * error message. They are global to the library so application linking with it | |
68 | * are able to compile correctly and also control verbosity of the library. | |
69 | * | |
70 | * Note that it is *not* possible to silent ERR() and PERROR() macros. | |
71 | */ | |
72 | int lttng_opt_quiet; | |
73 | int lttng_opt_verbose; | |
74 | ||
99497cd0 MD |
75 | /* |
76 | * Copy string from src to dst and enforce null terminated byte. | |
77 | */ | |
78 | static void copy_string(char *dst, const char *src, size_t len) | |
79 | { | |
e7d6716d | 80 | if (src && dst) { |
99497cd0 MD |
81 | strncpy(dst, src, len); |
82 | /* Enforce the NULL terminated byte */ | |
83 | dst[len - 1] = '\0'; | |
cd80958d DG |
84 | } else if (dst) { |
85 | dst[0] = '\0'; | |
99497cd0 MD |
86 | } |
87 | } | |
88 | ||
fac6795d | 89 | /* |
cd80958d | 90 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 91 | * |
cd80958d DG |
92 | * If domain is unknown, default domain will be the kernel. |
93 | */ | |
94 | static void copy_lttng_domain(struct lttng_domain *dst, struct lttng_domain *src) | |
95 | { | |
96 | if (src && dst) { | |
97 | switch (src->type) { | |
00e2e675 DG |
98 | case LTTNG_DOMAIN_KERNEL: |
99 | case LTTNG_DOMAIN_UST: | |
100 | /* | |
101 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
102 | case LTTNG_DOMAIN_UST_PID: | |
103 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
104 | */ | |
105 | memcpy(dst, src, sizeof(struct lttng_domain)); | |
106 | break; | |
107 | default: | |
108 | memset(dst, 0, sizeof(struct lttng_domain)); | |
109 | dst->type = LTTNG_DOMAIN_KERNEL; | |
110 | break; | |
cd80958d DG |
111 | } |
112 | } | |
113 | } | |
114 | ||
115 | /* | |
116 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 117 | * |
1c8d13c8 TD |
118 | * On success, returns the number of bytes sent (>=0) |
119 | * On error, returns -1 | |
fac6795d | 120 | */ |
cd80958d | 121 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
122 | { |
123 | int ret; | |
124 | ||
125 | if (!connected) { | |
e065084a DG |
126 | ret = -ENOTCONN; |
127 | goto end; | |
fac6795d DG |
128 | } |
129 | ||
be040666 | 130 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 131 | sizeof(struct lttcomm_session_msg)); |
e065084a DG |
132 | |
133 | end: | |
134 | return ret; | |
135 | } | |
136 | ||
53a80697 MD |
137 | /* |
138 | * Send var len data to the session daemon. | |
139 | * | |
140 | * On success, returns the number of bytes sent (>=0) | |
141 | * On error, returns -1 | |
142 | */ | |
143 | static int send_session_varlen(void *data, size_t len) | |
144 | { | |
145 | int ret; | |
146 | ||
147 | if (!connected) { | |
148 | ret = -ENOTCONN; | |
149 | goto end; | |
150 | } | |
151 | if (!data || !len) { | |
152 | ret = 0; | |
153 | goto end; | |
154 | } | |
155 | ||
156 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
157 | ||
158 | end: | |
159 | return ret; | |
160 | } | |
161 | ||
e065084a | 162 | /* |
cd80958d | 163 | * Receive data from the sessiond socket. |
e065084a | 164 | * |
1c8d13c8 TD |
165 | * On success, returns the number of bytes received (>=0) |
166 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 167 | */ |
ca95a216 | 168 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
169 | { |
170 | int ret; | |
171 | ||
172 | if (!connected) { | |
173 | ret = -ENOTCONN; | |
174 | goto end; | |
fac6795d DG |
175 | } |
176 | ||
ca95a216 | 177 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
fac6795d | 178 | |
e065084a | 179 | end: |
fac6795d DG |
180 | return ret; |
181 | } | |
182 | ||
183 | /* | |
1c8d13c8 | 184 | * Check if we are in the specified group. |
65beb5ff | 185 | * |
2269e89e | 186 | * If yes return 1, else return -1. |
947308c4 DG |
187 | */ |
188 | static int check_tracing_group(const char *grp_name) | |
189 | { | |
190 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
191 | gid_t *grp_list; | |
192 | int grp_list_size, grp_id, i; | |
193 | int ret = -1; | |
194 | ||
195 | /* Get GID of group 'tracing' */ | |
196 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
197 | if (!grp_tracing) { |
198 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
199 | goto end; |
200 | } | |
201 | ||
202 | /* Get number of supplementary group IDs */ | |
203 | grp_list_size = getgroups(0, NULL); | |
204 | if (grp_list_size < 0) { | |
205 | perror("getgroups"); | |
206 | goto end; | |
207 | } | |
208 | ||
209 | /* Alloc group list of the right size */ | |
210 | grp_list = malloc(grp_list_size * sizeof(gid_t)); | |
00795392 | 211 | if (!grp_list) { |
1c8d13c8 | 212 | perror("malloc"); |
00795392 MD |
213 | goto end; |
214 | } | |
947308c4 | 215 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 216 | if (grp_id < 0) { |
947308c4 DG |
217 | perror("getgroups"); |
218 | goto free_list; | |
219 | } | |
220 | ||
221 | for (i = 0; i < grp_list_size; i++) { | |
222 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 223 | ret = 1; |
947308c4 DG |
224 | break; |
225 | } | |
226 | } | |
227 | ||
228 | free_list: | |
229 | free(grp_list); | |
230 | ||
231 | end: | |
232 | return ret; | |
233 | } | |
234 | ||
235 | /* | |
2269e89e DG |
236 | * Try connect to session daemon with sock_path. |
237 | * | |
238 | * Return 0 on success, else -1 | |
239 | */ | |
240 | static int try_connect_sessiond(const char *sock_path) | |
241 | { | |
242 | int ret; | |
243 | ||
244 | /* If socket exist, we check if the daemon listens for connect. */ | |
245 | ret = access(sock_path, F_OK); | |
246 | if (ret < 0) { | |
247 | /* Not alive */ | |
248 | return -1; | |
249 | } | |
250 | ||
251 | ret = lttcomm_connect_unix_sock(sock_path); | |
252 | if (ret < 0) { | |
253 | /* Not alive */ | |
254 | return -1; | |
255 | } | |
256 | ||
257 | ret = lttcomm_close_unix_sock(ret); | |
258 | if (ret < 0) { | |
259 | perror("lttcomm_close_unix_sock"); | |
260 | } | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | /* | |
1c8d13c8 TD |
266 | * Set sessiond socket path by putting it in the global |
267 | * sessiond_sock_path variable. | |
268 | * Returns 0 on success, | |
269 | * -ENOMEM on failure (the sessiond socket path is somehow too long) | |
947308c4 DG |
270 | */ |
271 | static int set_session_daemon_path(void) | |
272 | { | |
273 | int ret; | |
2269e89e DG |
274 | int in_tgroup = 0; /* In tracing group */ |
275 | uid_t uid; | |
276 | ||
277 | uid = getuid(); | |
947308c4 | 278 | |
2269e89e DG |
279 | if (uid != 0) { |
280 | /* Are we in the tracing group ? */ | |
281 | in_tgroup = check_tracing_group(tracing_group); | |
282 | } | |
283 | ||
08a9c49f TD |
284 | if ((uid == 0) || in_tgroup) { |
285 | copy_string(sessiond_sock_path, DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
2269e89e | 286 | sizeof(sessiond_sock_path)); |
08a9c49f | 287 | } |
2269e89e | 288 | |
08a9c49f TD |
289 | if (uid != 0) { |
290 | if (in_tgroup) { | |
291 | /* Tracing group */ | |
292 | ret = try_connect_sessiond(sessiond_sock_path); | |
293 | if (ret >= 0) { | |
294 | goto end; | |
2269e89e | 295 | } |
08a9c49f | 296 | /* Global session daemon not available... */ |
2269e89e | 297 | } |
08a9c49f TD |
298 | /* ...or not in tracing group (and not root), default */ |
299 | ||
300 | /* | |
301 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
302 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
303 | */ | |
304 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
305 | DEFAULT_HOME_CLIENT_UNIX_SOCK, getenv("HOME")); | |
306 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { | |
947308c4 DG |
307 | return -ENOMEM; |
308 | } | |
947308c4 | 309 | } |
08a9c49f | 310 | end: |
947308c4 DG |
311 | return 0; |
312 | } | |
313 | ||
65beb5ff DG |
314 | /* |
315 | * Connect to the LTTng session daemon. | |
316 | * | |
317 | * On success, return 0. On error, return -1. | |
318 | */ | |
319 | static int connect_sessiond(void) | |
320 | { | |
321 | int ret; | |
322 | ||
323 | ret = set_session_daemon_path(); | |
324 | if (ret < 0) { | |
1c8d13c8 | 325 | return -1; /* set_session_daemon_path() returns -ENOMEM */ |
65beb5ff DG |
326 | } |
327 | ||
328 | /* Connect to the sesssion daemon */ | |
329 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); | |
330 | if (ret < 0) { | |
331 | return ret; | |
332 | } | |
333 | ||
334 | sessiond_socket = ret; | |
335 | connected = 1; | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | /* | |
1c8d13c8 TD |
341 | * Clean disconnect from the session daemon. |
342 | * On success, return 0. On error, return -1. | |
65beb5ff DG |
343 | */ |
344 | static int disconnect_sessiond(void) | |
345 | { | |
346 | int ret = 0; | |
347 | ||
348 | if (connected) { | |
349 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
350 | sessiond_socket = 0; | |
351 | connected = 0; | |
352 | } | |
353 | ||
354 | return ret; | |
355 | } | |
356 | ||
35a6fdb7 | 357 | /* |
cd80958d | 358 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 359 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 360 | * |
af87c45a | 361 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 362 | */ |
53a80697 MD |
363 | static int ask_sessiond_varlen(struct lttcomm_session_msg *lsm, |
364 | void *vardata, | |
365 | size_t varlen, | |
366 | void **buf) | |
65beb5ff DG |
367 | { |
368 | int ret; | |
369 | size_t size; | |
370 | void *data = NULL; | |
cd80958d | 371 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
372 | |
373 | ret = connect_sessiond(); | |
374 | if (ret < 0) { | |
375 | goto end; | |
376 | } | |
377 | ||
65beb5ff | 378 | /* Send command to session daemon */ |
cd80958d | 379 | ret = send_session_msg(lsm); |
65beb5ff DG |
380 | if (ret < 0) { |
381 | goto end; | |
382 | } | |
53a80697 MD |
383 | /* Send var len data */ |
384 | ret = send_session_varlen(vardata, varlen); | |
385 | if (ret < 0) { | |
386 | goto end; | |
387 | } | |
65beb5ff DG |
388 | |
389 | /* Get header from data transmission */ | |
390 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
391 | if (ret < 0) { | |
392 | goto end; | |
393 | } | |
394 | ||
395 | /* Check error code if OK */ | |
396 | if (llm.ret_code != LTTCOMM_OK) { | |
397 | ret = -llm.ret_code; | |
398 | goto end; | |
399 | } | |
400 | ||
401 | size = llm.data_size; | |
402 | if (size == 0) { | |
874d3f84 | 403 | /* If client free with size 0 */ |
a45d5536 DG |
404 | if (buf != NULL) { |
405 | *buf = NULL; | |
406 | } | |
7d29a247 | 407 | ret = 0; |
65beb5ff DG |
408 | goto end; |
409 | } | |
410 | ||
411 | data = (void*) malloc(size); | |
412 | ||
413 | /* Get payload data */ | |
414 | ret = recv_data_sessiond(data, size); | |
415 | if (ret < 0) { | |
416 | free(data); | |
417 | goto end; | |
418 | } | |
419 | ||
83009e5e DG |
420 | /* |
421 | * Extra protection not to dereference a NULL pointer. If buf is NULL at | |
422 | * this point, an error is returned and data is freed. | |
423 | */ | |
424 | if (buf == NULL) { | |
425 | ret = -1; | |
426 | free(data); | |
427 | goto end; | |
428 | } | |
429 | ||
65beb5ff DG |
430 | *buf = data; |
431 | ret = size; | |
432 | ||
433 | end: | |
434 | disconnect_sessiond(); | |
435 | return ret; | |
436 | } | |
437 | ||
53a80697 MD |
438 | /* |
439 | * Ask the session daemon a specific command and put the data into buf. | |
440 | * | |
441 | * Return size of data (only payload, not header) or a negative error code. | |
442 | */ | |
443 | static int ask_sessiond(struct lttcomm_session_msg *lsm, void **buf) | |
444 | { | |
445 | return ask_sessiond_varlen(lsm, NULL, 0, buf); | |
446 | } | |
447 | ||
9f19cc17 | 448 | /* |
cd80958d | 449 | * Create lttng handle and return pointer. |
1c8d13c8 | 450 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 451 | */ |
cd80958d DG |
452 | struct lttng_handle *lttng_create_handle(const char *session_name, |
453 | struct lttng_domain *domain) | |
9f19cc17 | 454 | { |
cd80958d DG |
455 | struct lttng_handle *handle; |
456 | ||
457 | handle = malloc(sizeof(struct lttng_handle)); | |
458 | if (handle == NULL) { | |
459 | perror("malloc handle"); | |
460 | goto end; | |
461 | } | |
462 | ||
463 | /* Copy session name */ | |
464 | copy_string(handle->session_name, session_name, | |
465 | sizeof(handle->session_name)); | |
466 | ||
467 | /* Copy lttng domain */ | |
468 | copy_lttng_domain(&handle->domain, domain); | |
469 | ||
470 | end: | |
471 | return handle; | |
472 | } | |
473 | ||
474 | /* | |
475 | * Destroy handle by free(3) the pointer. | |
476 | */ | |
477 | void lttng_destroy_handle(struct lttng_handle *handle) | |
478 | { | |
479 | if (handle) { | |
480 | free(handle); | |
eb354453 DG |
481 | } |
482 | } | |
483 | ||
d9800920 DG |
484 | /* |
485 | * Register an outside consumer. | |
1c8d13c8 | 486 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
487 | */ |
488 | int lttng_register_consumer(struct lttng_handle *handle, | |
489 | const char *socket_path) | |
490 | { | |
491 | struct lttcomm_session_msg lsm; | |
492 | ||
493 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; | |
494 | copy_string(lsm.session.name, handle->session_name, | |
495 | sizeof(lsm.session.name)); | |
496 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
497 | ||
498 | copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); | |
499 | ||
500 | return ask_sessiond(&lsm, NULL); | |
501 | } | |
502 | ||
1df4dedd | 503 | /* |
1c8d13c8 TD |
504 | * Start tracing for all traces of the session. |
505 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 506 | */ |
6a4f824d | 507 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 508 | { |
cd80958d DG |
509 | struct lttcomm_session_msg lsm; |
510 | ||
6a4f824d | 511 | if (session_name == NULL) { |
cd80958d DG |
512 | return -1; |
513 | } | |
514 | ||
515 | lsm.cmd_type = LTTNG_START_TRACE; | |
6a4f824d DG |
516 | |
517 | copy_string(lsm.session.name, session_name, sizeof(lsm.session.name)); | |
cd80958d DG |
518 | |
519 | return ask_sessiond(&lsm, NULL); | |
f3ed775e | 520 | } |
1df4dedd DG |
521 | |
522 | /* | |
1c8d13c8 TD |
523 | * Stop tracing for all traces of the session. |
524 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 525 | */ |
6a4f824d | 526 | int lttng_stop_tracing(const char *session_name) |
f3ed775e | 527 | { |
cd80958d DG |
528 | struct lttcomm_session_msg lsm; |
529 | ||
6a4f824d DG |
530 | if (session_name == NULL) { |
531 | return -1; | |
532 | } | |
533 | ||
cd80958d | 534 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d DG |
535 | |
536 | copy_string(lsm.session.name, session_name, sizeof(lsm.session.name)); | |
cd80958d DG |
537 | |
538 | return ask_sessiond(&lsm, NULL); | |
f3ed775e DG |
539 | } |
540 | ||
541 | /* | |
1e46a50f TD |
542 | * Add context to event and/or channel. |
543 | * If event_name is NULL, the context is applied to all events of the channel. | |
544 | * If channel_name is NULL, a lookup of the event's channel is done. | |
545 | * If both are NULL, the context is applied to all events of all channels. | |
af87c45a DG |
546 | * |
547 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 548 | */ |
cd80958d | 549 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
550 | struct lttng_event_context *ctx, const char *event_name, |
551 | const char *channel_name) | |
d65106b1 | 552 | { |
cd80958d DG |
553 | struct lttcomm_session_msg lsm; |
554 | ||
9d697d3d DG |
555 | /* Safety check. Both are mandatory */ |
556 | if (handle == NULL || ctx == NULL) { | |
cd80958d DG |
557 | return -1; |
558 | } | |
559 | ||
441c16a7 MD |
560 | memset(&lsm, 0, sizeof(lsm)); |
561 | ||
cd80958d DG |
562 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
563 | ||
564 | /* Copy channel name */ | |
565 | copy_string(lsm.u.context.channel_name, channel_name, | |
566 | sizeof(lsm.u.context.channel_name)); | |
567 | /* Copy event name */ | |
568 | copy_string(lsm.u.context.event_name, event_name, | |
569 | sizeof(lsm.u.context.event_name)); | |
570 | ||
571 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
d65106b1 | 572 | |
9d697d3d | 573 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); |
d65106b1 | 574 | |
cd80958d DG |
575 | copy_string(lsm.session.name, handle->session_name, |
576 | sizeof(lsm.session.name)); | |
577 | ||
578 | return ask_sessiond(&lsm, NULL); | |
d65106b1 DG |
579 | } |
580 | ||
f3ed775e | 581 | /* |
1c8d13c8 TD |
582 | * Enable event(s) for a channel. |
583 | * If no event name is specified, all events are enabled. | |
584 | * If no channel name is specified, the default 'channel0' is used. | |
585 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 586 | */ |
cd80958d | 587 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 588 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 589 | { |
cd80958d DG |
590 | struct lttcomm_session_msg lsm; |
591 | ||
5117eeec | 592 | if (handle == NULL || ev == NULL) { |
cd80958d DG |
593 | return -1; |
594 | } | |
33a2b854 | 595 | |
441c16a7 MD |
596 | memset(&lsm, 0, sizeof(lsm)); |
597 | ||
5117eeec | 598 | /* If no channel name, we put the default name */ |
94cf3c47 | 599 | if (channel_name == NULL) { |
cd80958d DG |
600 | copy_string(lsm.u.enable.channel_name, DEFAULT_CHANNEL_NAME, |
601 | sizeof(lsm.u.enable.channel_name)); | |
33a2b854 | 602 | } else { |
cd80958d DG |
603 | copy_string(lsm.u.enable.channel_name, channel_name, |
604 | sizeof(lsm.u.enable.channel_name)); | |
eb354453 DG |
605 | } |
606 | ||
cd80958d | 607 | copy_lttng_domain(&lsm.domain, &handle->domain); |
0d0c377a | 608 | |
8c9ae521 | 609 | if (ev->name[0] != '\0') { |
cd80958d | 610 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
0d0c377a | 611 | } else { |
cd80958d | 612 | lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT; |
f3ed775e | 613 | } |
8c9ae521 | 614 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
f3ed775e | 615 | |
cd80958d DG |
616 | copy_string(lsm.session.name, handle->session_name, |
617 | sizeof(lsm.session.name)); | |
618 | ||
619 | return ask_sessiond(&lsm, NULL); | |
1df4dedd DG |
620 | } |
621 | ||
53a80697 MD |
622 | /* |
623 | * set filter for an event | |
624 | * Return negative error value on error. | |
625 | * Return size of returned session payload data if OK. | |
626 | */ | |
627 | ||
628 | int lttng_set_event_filter(struct lttng_handle *handle, | |
629 | const char *event_name, const char *channel_name, | |
630 | const char *filter_expression) | |
631 | { | |
632 | struct lttcomm_session_msg lsm; | |
633 | struct filter_parser_ctx *ctx; | |
634 | FILE *fmem; | |
635 | int ret = 0; | |
636 | ||
637 | /* Safety check. */ | |
638 | if (handle == NULL) { | |
639 | return -1; | |
640 | } | |
641 | ||
642 | if (!filter_expression) { | |
643 | return 0; | |
644 | } | |
645 | ||
646 | /* | |
647 | * casting const to non-const, as the underlying function will | |
648 | * use it in read-only mode. | |
649 | */ | |
650 | fmem = lttng_fmemopen((void *) filter_expression, | |
651 | strlen(filter_expression), "r"); | |
652 | if (!fmem) { | |
653 | fprintf(stderr, "Error opening memory as stream\n"); | |
654 | return -ENOMEM; | |
655 | } | |
656 | ctx = filter_parser_ctx_alloc(fmem); | |
657 | if (!ctx) { | |
658 | fprintf(stderr, "Error allocating parser\n"); | |
659 | ret = -ENOMEM; | |
660 | goto alloc_error; | |
661 | } | |
662 | ret = filter_parser_ctx_append_ast(ctx); | |
663 | if (ret) { | |
664 | fprintf(stderr, "Parse error\n"); | |
665 | ret = -EINVAL; | |
666 | goto parse_error; | |
667 | } | |
668 | ret = filter_visitor_set_parent(ctx); | |
669 | if (ret) { | |
670 | fprintf(stderr, "Set parent error\n"); | |
671 | ret = -EINVAL; | |
672 | goto parse_error; | |
673 | } | |
674 | if (print_xml) { | |
675 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
676 | if (ret) { | |
677 | fflush(stdout); | |
678 | fprintf(stderr, "XML print error\n"); | |
679 | ret = -EINVAL; | |
680 | goto parse_error; | |
681 | } | |
682 | } | |
683 | ||
684 | dbg_printf("Generating IR... "); | |
685 | fflush(stdout); | |
686 | ret = filter_visitor_ir_generate(ctx); | |
687 | if (ret) { | |
688 | fprintf(stderr, "Generate IR error\n"); | |
689 | ret = -EINVAL; | |
690 | goto parse_error; | |
691 | } | |
692 | dbg_printf("done\n"); | |
693 | ||
694 | dbg_printf("Validating IR... "); | |
695 | fflush(stdout); | |
696 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
697 | if (ret) { | |
698 | ret = -EINVAL; | |
699 | goto parse_error; | |
700 | } | |
701 | dbg_printf("done\n"); | |
702 | ||
703 | dbg_printf("Generating bytecode... "); | |
704 | fflush(stdout); | |
705 | ret = filter_visitor_bytecode_generate(ctx); | |
706 | if (ret) { | |
707 | fprintf(stderr, "Generate bytecode error\n"); | |
708 | ret = -EINVAL; | |
709 | goto parse_error; | |
710 | } | |
711 | dbg_printf("done\n"); | |
712 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
713 | bytecode_get_len(&ctx->bytecode->b)); | |
714 | ||
715 | memset(&lsm, 0, sizeof(lsm)); | |
716 | ||
717 | lsm.cmd_type = LTTNG_SET_FILTER; | |
718 | ||
719 | /* Copy channel name */ | |
720 | copy_string(lsm.u.filter.channel_name, channel_name, | |
721 | sizeof(lsm.u.filter.channel_name)); | |
722 | /* Copy event name */ | |
723 | copy_string(lsm.u.filter.event_name, event_name, | |
724 | sizeof(lsm.u.filter.event_name)); | |
725 | lsm.u.filter.bytecode_len = sizeof(ctx->bytecode->b) | |
726 | + bytecode_get_len(&ctx->bytecode->b); | |
727 | ||
728 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
729 | ||
730 | copy_string(lsm.session.name, handle->session_name, | |
731 | sizeof(lsm.session.name)); | |
732 | ||
733 | ret = ask_sessiond_varlen(&lsm, &ctx->bytecode->b, | |
734 | lsm.u.filter.bytecode_len, NULL); | |
735 | ||
736 | filter_bytecode_free(ctx); | |
737 | filter_ir_free(ctx); | |
738 | filter_parser_ctx_free(ctx); | |
739 | if (fclose(fmem) != 0) { | |
740 | perror("fclose"); | |
741 | } | |
742 | return ret; | |
743 | ||
744 | parse_error: | |
745 | filter_bytecode_free(ctx); | |
746 | filter_ir_free(ctx); | |
747 | filter_parser_ctx_free(ctx); | |
748 | alloc_error: | |
749 | if (fclose(fmem) != 0) { | |
750 | perror("fclose"); | |
751 | } | |
752 | return ret; | |
753 | } | |
754 | ||
1df4dedd | 755 | /* |
1c8d13c8 TD |
756 | * Disable event(s) of a channel and domain. |
757 | * If no event name is specified, all events are disabled. | |
758 | * If no channel name is specified, the default 'channel0' is used. | |
759 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 760 | */ |
cd80958d | 761 | int lttng_disable_event(struct lttng_handle *handle, const char *name, |
38057ed1 | 762 | const char *channel_name) |
1df4dedd | 763 | { |
cd80958d | 764 | struct lttcomm_session_msg lsm; |
1df4dedd | 765 | |
9d697d3d | 766 | if (handle == NULL) { |
cd80958d DG |
767 | return -1; |
768 | } | |
769 | ||
441c16a7 MD |
770 | memset(&lsm, 0, sizeof(lsm)); |
771 | ||
cd80958d DG |
772 | if (channel_name) { |
773 | copy_string(lsm.u.disable.channel_name, channel_name, | |
774 | sizeof(lsm.u.disable.channel_name)); | |
f3ed775e | 775 | } else { |
cd80958d DG |
776 | copy_string(lsm.u.disable.channel_name, DEFAULT_CHANNEL_NAME, |
777 | sizeof(lsm.u.disable.channel_name)); | |
eb354453 DG |
778 | } |
779 | ||
cd80958d | 780 | copy_lttng_domain(&lsm.domain, &handle->domain); |
f5177a38 | 781 | |
f84efadf | 782 | if (name != NULL) { |
cd80958d DG |
783 | copy_string(lsm.u.disable.name, name, sizeof(lsm.u.disable.name)); |
784 | lsm.cmd_type = LTTNG_DISABLE_EVENT; | |
f5177a38 | 785 | } else { |
cd80958d | 786 | lsm.cmd_type = LTTNG_DISABLE_ALL_EVENT; |
f3ed775e DG |
787 | } |
788 | ||
cd80958d DG |
789 | copy_string(lsm.session.name, handle->session_name, |
790 | sizeof(lsm.session.name)); | |
791 | ||
792 | return ask_sessiond(&lsm, NULL); | |
1df4dedd DG |
793 | } |
794 | ||
795 | /* | |
1c8d13c8 TD |
796 | * Enable channel per domain |
797 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 798 | */ |
cd80958d | 799 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 800 | struct lttng_channel *chan) |
a5c5a2bd | 801 | { |
cd80958d DG |
802 | struct lttcomm_session_msg lsm; |
803 | ||
5117eeec DG |
804 | /* |
805 | * NULL arguments are forbidden. No default values. | |
806 | */ | |
807 | if (handle == NULL || chan == NULL) { | |
cd80958d DG |
808 | return -1; |
809 | } | |
810 | ||
441c16a7 MD |
811 | memset(&lsm, 0, sizeof(lsm)); |
812 | ||
5117eeec | 813 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 814 | |
cd80958d DG |
815 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
816 | ||
817 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
7d29a247 | 818 | |
cd80958d DG |
819 | copy_string(lsm.session.name, handle->session_name, |
820 | sizeof(lsm.session.name)); | |
821 | ||
822 | return ask_sessiond(&lsm, NULL); | |
8c0faa1d | 823 | } |
1df4dedd | 824 | |
2ef84c95 | 825 | /* |
1c8d13c8 TD |
826 | * All tracing will be stopped for registered events of the channel. |
827 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 828 | */ |
cd80958d | 829 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 830 | { |
cd80958d DG |
831 | struct lttcomm_session_msg lsm; |
832 | ||
9d697d3d DG |
833 | /* Safety check. Both are mandatory */ |
834 | if (handle == NULL || name == NULL) { | |
cd80958d DG |
835 | return -1; |
836 | } | |
837 | ||
441c16a7 MD |
838 | memset(&lsm, 0, sizeof(lsm)); |
839 | ||
cd80958d | 840 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 841 | |
9d697d3d DG |
842 | copy_string(lsm.u.disable.channel_name, name, |
843 | sizeof(lsm.u.disable.channel_name)); | |
844 | ||
cd80958d DG |
845 | copy_lttng_domain(&lsm.domain, &handle->domain); |
846 | ||
847 | copy_string(lsm.session.name, handle->session_name, | |
848 | sizeof(lsm.session.name)); | |
849 | ||
850 | return ask_sessiond(&lsm, NULL); | |
ca95a216 DG |
851 | } |
852 | ||
fac6795d | 853 | /* |
1c8d13c8 TD |
854 | * Lists all available tracepoints of domain. |
855 | * Sets the contents of the events array. | |
856 | * Returns the number of lttng_event entries in events; | |
857 | * on error, returns a negative value. | |
fac6795d | 858 | */ |
cd80958d | 859 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 860 | struct lttng_event **events) |
fac6795d | 861 | { |
052da939 | 862 | int ret; |
cd80958d DG |
863 | struct lttcomm_session_msg lsm; |
864 | ||
9d697d3d | 865 | if (handle == NULL) { |
cd80958d DG |
866 | return -1; |
867 | } | |
fac6795d | 868 | |
cd80958d DG |
869 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
870 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
2a71efd5 | 871 | |
cd80958d | 872 | ret = ask_sessiond(&lsm, (void **) events); |
052da939 DG |
873 | if (ret < 0) { |
874 | return ret; | |
eb354453 | 875 | } |
fac6795d | 876 | |
9f19cc17 | 877 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
878 | } |
879 | ||
f37d259d MD |
880 | /* |
881 | * Lists all available tracepoint fields of domain. | |
882 | * Sets the contents of the event field array. | |
883 | * Returns the number of lttng_event_field entries in events; | |
884 | * on error, returns a negative value. | |
885 | */ | |
886 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
887 | struct lttng_event_field **fields) | |
888 | { | |
889 | int ret; | |
890 | struct lttcomm_session_msg lsm; | |
891 | ||
892 | if (handle == NULL) { | |
893 | return -1; | |
894 | } | |
895 | ||
896 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; | |
897 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
898 | ||
899 | ret = ask_sessiond(&lsm, (void **) fields); | |
900 | if (ret < 0) { | |
901 | return ret; | |
902 | } | |
903 | ||
904 | return ret / sizeof(struct lttng_event_field); | |
905 | } | |
906 | ||
1657e9bb | 907 | /* |
1c8d13c8 TD |
908 | * Returns a human readable string describing |
909 | * the error code (a negative value). | |
1657e9bb | 910 | */ |
9a745bc7 | 911 | const char *lttng_strerror(int code) |
1657e9bb | 912 | { |
1c8d13c8 | 913 | /* lttcomm error codes range from -LTTCOMM_OK down to -LTTCOMM_NR */ |
7d29a247 DG |
914 | if (code > -LTTCOMM_OK) { |
915 | return "Ended with errors"; | |
1657e9bb DG |
916 | } |
917 | ||
7d29a247 | 918 | return lttcomm_get_readable_code(code); |
1657e9bb DG |
919 | } |
920 | ||
aaf97519 | 921 | /* |
1c8d13c8 TD |
922 | * Create a brand new session using name and path. |
923 | * Returns size of returned session payload data or a negative error code. | |
aaf97519 | 924 | */ |
38057ed1 | 925 | int lttng_create_session(const char *name, const char *path) |
aaf97519 | 926 | { |
cd80958d DG |
927 | struct lttcomm_session_msg lsm; |
928 | ||
929 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
930 | copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
931 | copy_string(lsm.session.path, path, sizeof(lsm.session.path)); | |
932 | ||
933 | return ask_sessiond(&lsm, NULL); | |
8028d920 DG |
934 | } |
935 | ||
00e2e675 DG |
936 | /* |
937 | * Create a new tracing session using a name, URIs and a consumer enable flag. | |
938 | */ | |
939 | int lttng_create_session_uri(const char *name, struct lttng_uri *ctrl_uri, | |
940 | struct lttng_uri *data_uri, unsigned int enable_consumer) | |
941 | { | |
942 | struct lttcomm_session_msg lsm; | |
943 | ||
944 | /* Name and ctrl_uri are mandatory */ | |
945 | if (name == NULL || ctrl_uri == NULL) { | |
946 | return -1; | |
947 | } | |
948 | ||
949 | lsm.cmd_type = LTTNG_CREATE_SESSION_URI; | |
950 | ||
951 | copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
952 | /* Anything bigger than zero, the consumer(s) will be enabled */ | |
953 | lsm.u.create_uri.enable_consumer = enable_consumer; | |
954 | memcpy(&lsm.u.create_uri.ctrl_uri, ctrl_uri, | |
955 | sizeof(lsm.u.create_uri.ctrl_uri)); | |
956 | if (data_uri) { | |
957 | /* | |
958 | * The only possible scenario where data_uri is NULL is for a local | |
959 | * consumer where the output is at a specified path name on the | |
960 | * filesystem. | |
961 | */ | |
962 | memcpy(&lsm.u.create_uri.data_uri, data_uri, | |
963 | sizeof(lsm.u.create_uri.data_uri)); | |
964 | } | |
965 | ||
966 | return ask_sessiond(&lsm, NULL); | |
967 | } | |
968 | ||
8028d920 | 969 | /* |
8028d920 | 970 | * Destroy session using name. |
1c8d13c8 | 971 | * Returns size of returned session payload data or a negative error code. |
8028d920 | 972 | */ |
843f5df9 | 973 | int lttng_destroy_session(const char *session_name) |
8028d920 | 974 | { |
cd80958d DG |
975 | struct lttcomm_session_msg lsm; |
976 | ||
843f5df9 | 977 | if (session_name == NULL) { |
cd80958d DG |
978 | return -1; |
979 | } | |
980 | ||
981 | lsm.cmd_type = LTTNG_DESTROY_SESSION; | |
843f5df9 DG |
982 | |
983 | copy_string(lsm.session.name, session_name, sizeof(lsm.session.name)); | |
cd80958d DG |
984 | |
985 | return ask_sessiond(&lsm, NULL); | |
aaf97519 DG |
986 | } |
987 | ||
57167058 | 988 | /* |
57167058 | 989 | * Ask the session daemon for all available sessions. |
1c8d13c8 TD |
990 | * Sets the contents of the sessions array. |
991 | * Returns the number of lttng_session entries in sessions; | |
992 | * on error, returns a negative value. | |
57167058 | 993 | */ |
ca95a216 | 994 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 995 | { |
ca95a216 | 996 | int ret; |
cd80958d | 997 | struct lttcomm_session_msg lsm; |
57167058 | 998 | |
cd80958d DG |
999 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
1000 | ret = ask_sessiond(&lsm, (void**) sessions); | |
57167058 | 1001 | if (ret < 0) { |
ca95a216 | 1002 | return ret; |
57167058 DG |
1003 | } |
1004 | ||
ca95a216 | 1005 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1006 | } |
1007 | ||
9f19cc17 | 1008 | /* |
1c8d13c8 TD |
1009 | * Ask the session daemon for all available domains of a session. |
1010 | * Sets the contents of the domains array. | |
1011 | * Returns the number of lttng_domain entries in domains; | |
1012 | * on error, returns a negative value. | |
9f19cc17 | 1013 | */ |
330be774 | 1014 | int lttng_list_domains(const char *session_name, |
cd80958d | 1015 | struct lttng_domain **domains) |
9f19cc17 DG |
1016 | { |
1017 | int ret; | |
cd80958d DG |
1018 | struct lttcomm_session_msg lsm; |
1019 | ||
330be774 | 1020 | if (session_name == NULL) { |
cd80958d DG |
1021 | return -1; |
1022 | } | |
9f19cc17 | 1023 | |
cd80958d DG |
1024 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1025 | ||
330be774 | 1026 | copy_string(lsm.session.name, session_name, sizeof(lsm.session.name)); |
cd80958d DG |
1027 | |
1028 | ret = ask_sessiond(&lsm, (void**) domains); | |
9f19cc17 DG |
1029 | if (ret < 0) { |
1030 | return ret; | |
1031 | } | |
1032 | ||
1033 | return ret / sizeof(struct lttng_domain); | |
1034 | } | |
1035 | ||
1036 | /* | |
1c8d13c8 TD |
1037 | * Ask the session daemon for all available channels of a session. |
1038 | * Sets the contents of the channels array. | |
1039 | * Returns the number of lttng_channel entries in channels; | |
1040 | * on error, returns a negative value. | |
9f19cc17 | 1041 | */ |
cd80958d DG |
1042 | int lttng_list_channels(struct lttng_handle *handle, |
1043 | struct lttng_channel **channels) | |
9f19cc17 DG |
1044 | { |
1045 | int ret; | |
cd80958d DG |
1046 | struct lttcomm_session_msg lsm; |
1047 | ||
9d697d3d | 1048 | if (handle == NULL) { |
cd80958d DG |
1049 | return -1; |
1050 | } | |
1051 | ||
1052 | lsm.cmd_type = LTTNG_LIST_CHANNELS; | |
1053 | copy_string(lsm.session.name, handle->session_name, | |
1054 | sizeof(lsm.session.name)); | |
9f19cc17 | 1055 | |
cd80958d | 1056 | copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1057 | |
cd80958d | 1058 | ret = ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1059 | if (ret < 0) { |
1060 | return ret; | |
1061 | } | |
1062 | ||
1063 | return ret / sizeof(struct lttng_channel); | |
1064 | } | |
1065 | ||
1066 | /* | |
1c8d13c8 TD |
1067 | * Ask the session daemon for all available events of a session channel. |
1068 | * Sets the contents of the events array. | |
1069 | * Returns the number of lttng_event entries in events; | |
1070 | * on error, returns a negative value. | |
9f19cc17 | 1071 | */ |
cd80958d DG |
1072 | int lttng_list_events(struct lttng_handle *handle, |
1073 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1074 | { |
1075 | int ret; | |
cd80958d | 1076 | struct lttcomm_session_msg lsm; |
9f19cc17 | 1077 | |
9d697d3d DG |
1078 | /* Safety check. An handle and channel name are mandatory */ |
1079 | if (handle == NULL || channel_name == NULL) { | |
cd80958d DG |
1080 | return -1; |
1081 | } | |
1082 | ||
1083 | lsm.cmd_type = LTTNG_LIST_EVENTS; | |
1084 | copy_string(lsm.session.name, handle->session_name, | |
1085 | sizeof(lsm.session.name)); | |
1086 | copy_string(lsm.u.list.channel_name, channel_name, | |
1087 | sizeof(lsm.u.list.channel_name)); | |
1088 | ||
1089 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
9f19cc17 | 1090 | |
cd80958d | 1091 | ret = ask_sessiond(&lsm, (void**) events); |
9f19cc17 DG |
1092 | if (ret < 0) { |
1093 | return ret; | |
1094 | } | |
1095 | ||
1096 | return ret / sizeof(struct lttng_event); | |
1097 | } | |
1098 | ||
fac6795d | 1099 | /* |
1c8d13c8 TD |
1100 | * Sets the tracing_group variable with name. |
1101 | * This function allocates memory pointed to by tracing_group. | |
1102 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1103 | */ |
1104 | int lttng_set_tracing_group(const char *name) | |
1105 | { | |
9d697d3d DG |
1106 | if (name == NULL) { |
1107 | return -1; | |
1108 | } | |
1109 | ||
fac6795d DG |
1110 | if (asprintf(&tracing_group, "%s", name) < 0) { |
1111 | return -ENOMEM; | |
1112 | } | |
1113 | ||
1114 | return 0; | |
1115 | } | |
1116 | ||
d0254c7c | 1117 | /* |
af87c45a | 1118 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1119 | */ |
cd80958d | 1120 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1121 | struct lttng_calibrate *calibrate) |
1122 | { | |
cd80958d | 1123 | struct lttcomm_session_msg lsm; |
d0254c7c | 1124 | |
9d697d3d DG |
1125 | /* Safety check. NULL pointer are forbidden */ |
1126 | if (handle == NULL || calibrate == NULL) { | |
cd80958d DG |
1127 | return -1; |
1128 | } | |
d0254c7c | 1129 | |
cd80958d DG |
1130 | lsm.cmd_type = LTTNG_CALIBRATE; |
1131 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
d0254c7c | 1132 | |
cd80958d DG |
1133 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1134 | ||
1135 | return ask_sessiond(&lsm, NULL); | |
d0254c7c MD |
1136 | } |
1137 | ||
5edd7e09 DG |
1138 | /* |
1139 | * Set default channel attributes. | |
441c16a7 | 1140 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1141 | */ |
1142 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1143 | struct lttng_channel_attr *attr) | |
1144 | { | |
1145 | /* Safety check */ | |
1146 | if (attr == NULL || domain == NULL) { | |
1147 | return; | |
1148 | } | |
1149 | ||
eacaa7a6 DS |
1150 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1151 | ||
5edd7e09 DG |
1152 | switch (domain->type) { |
1153 | case LTTNG_DOMAIN_KERNEL: | |
1154 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1155 | attr->switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; | |
1156 | attr->read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
1157 | ||
1158 | attr->subbuf_size = DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE; | |
1159 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; | |
1160 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1161 | break; | |
1162 | case LTTNG_DOMAIN_UST: | |
d78d6610 | 1163 | #if 0 |
5edd7e09 DG |
1164 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
1165 | case LTTNG_DOMAIN_UST_PID: | |
1166 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 1167 | #endif |
5edd7e09 DG |
1168 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; |
1169 | attr->switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; | |
1170 | attr->read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
1171 | ||
1172 | attr->subbuf_size = DEFAULT_UST_CHANNEL_SUBBUF_SIZE; | |
1173 | attr->num_subbuf = DEFAULT_UST_CHANNEL_SUBBUF_NUM; | |
1174 | attr->output = DEFAULT_UST_CHANNEL_OUTPUT; | |
1175 | break; | |
1176 | default: | |
441c16a7 | 1177 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1178 | break; |
1179 | } | |
1180 | } | |
1181 | ||
fac6795d | 1182 | /* |
2269e89e | 1183 | * Check if session daemon is alive. |
fac6795d | 1184 | * |
2269e89e | 1185 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1186 | * On error returns a negative value. |
fac6795d | 1187 | */ |
947308c4 | 1188 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1189 | { |
1190 | int ret; | |
1191 | ||
1192 | ret = set_session_daemon_path(); | |
1193 | if (ret < 0) { | |
947308c4 | 1194 | /* Error */ |
fac6795d DG |
1195 | return ret; |
1196 | } | |
1197 | ||
2269e89e DG |
1198 | if (strlen(sessiond_sock_path) == 0) { |
1199 | /* No socket path set. Weird error */ | |
1200 | return -1; | |
fac6795d DG |
1201 | } |
1202 | ||
2269e89e | 1203 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 MD |
1204 | if (ret < 0) { |
1205 | /* Not alive */ | |
1206 | return 0; | |
1207 | } | |
7d8234d9 | 1208 | |
947308c4 DG |
1209 | /* Is alive */ |
1210 | return 1; | |
fac6795d DG |
1211 | } |
1212 | ||
00e2e675 DG |
1213 | /* |
1214 | * Set URI for a consumer for a session and domain. | |
1215 | * | |
1216 | * Return 0 on success, else a negative value. | |
1217 | */ | |
1218 | int lttng_set_consumer_uri(struct lttng_handle *handle, struct lttng_uri *uri) | |
1219 | { | |
1220 | struct lttcomm_session_msg lsm; | |
1221 | ||
1222 | if (handle == NULL || uri == NULL) { | |
1223 | return -1; | |
1224 | } | |
1225 | ||
1226 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; | |
1227 | ||
1228 | copy_string(lsm.session.name, handle->session_name, | |
1229 | sizeof(lsm.session.name)); | |
1230 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
1231 | ||
1232 | memcpy(&lsm.u.uri, uri, sizeof(lsm.u.uri)); | |
1233 | ||
1234 | return ask_sessiond(&lsm, NULL); | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * Enable consumer for a session and domain. | |
1239 | * | |
1240 | * Return 0 on success, else a negative value. | |
1241 | */ | |
1242 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1243 | { | |
1244 | struct lttcomm_session_msg lsm; | |
1245 | ||
1246 | if (handle == NULL) { | |
1247 | return -1; | |
1248 | } | |
1249 | ||
1250 | lsm.cmd_type = LTTNG_ENABLE_CONSUMER; | |
1251 | ||
1252 | copy_string(lsm.session.name, handle->session_name, | |
1253 | sizeof(lsm.session.name)); | |
1254 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
1255 | ||
1256 | return ask_sessiond(&lsm, NULL); | |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | * Disable consumer for a session and domain. | |
1261 | * | |
1262 | * Return 0 on success, else a negative value. | |
1263 | */ | |
1264 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1265 | { | |
1266 | struct lttcomm_session_msg lsm; | |
1267 | ||
1268 | if (handle == NULL) { | |
1269 | return -1; | |
1270 | } | |
1271 | ||
1272 | lsm.cmd_type = LTTNG_DISABLE_CONSUMER; | |
1273 | ||
1274 | copy_string(lsm.session.name, handle->session_name, | |
1275 | sizeof(lsm.session.name)); | |
1276 | copy_lttng_domain(&lsm.domain, &handle->domain); | |
1277 | ||
1278 | return ask_sessiond(&lsm, NULL); | |
1279 | } | |
1280 | ||
fac6795d DG |
1281 | /* |
1282 | * lib constructor | |
1283 | */ | |
1284 | static void __attribute__((constructor)) init() | |
1285 | { | |
1286 | /* Set default session group */ | |
bbccc3d2 | 1287 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 1288 | } |