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]; | |
44a5e5eb | 63 | static char health_sock_path[PATH_MAX]; |
fac6795d | 64 | |
fac6795d DG |
65 | /* Variables */ |
66 | static char *tracing_group; | |
67 | static int connected; | |
68 | ||
97e19046 DG |
69 | /* Global */ |
70 | ||
71 | /* | |
72 | * Those two variables are used by error.h to silent or control the verbosity of | |
73 | * error message. They are global to the library so application linking with it | |
74 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
75 | */ |
76 | int lttng_opt_quiet; | |
77 | int lttng_opt_verbose; | |
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: | |
00e2e675 DG |
107 | memcpy(dst, src, sizeof(struct lttng_domain)); |
108 | break; | |
109 | default: | |
110 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 111 | break; |
cd80958d DG |
112 | } |
113 | } | |
114 | } | |
115 | ||
116 | /* | |
117 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 118 | * |
1c8d13c8 TD |
119 | * On success, returns the number of bytes sent (>=0) |
120 | * On error, returns -1 | |
fac6795d | 121 | */ |
cd80958d | 122 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
123 | { |
124 | int ret; | |
125 | ||
126 | if (!connected) { | |
2f70b271 | 127 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 128 | goto end; |
fac6795d DG |
129 | } |
130 | ||
a4b92340 DG |
131 | DBG("LSM cmd type : %d", lsm->cmd_type); |
132 | ||
be040666 | 133 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 134 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
135 | if (ret < 0) { |
136 | ret = -LTTNG_ERR_FATAL; | |
137 | } | |
e065084a DG |
138 | |
139 | end: | |
140 | return ret; | |
141 | } | |
142 | ||
53a80697 MD |
143 | /* |
144 | * Send var len data to the session daemon. | |
145 | * | |
146 | * On success, returns the number of bytes sent (>=0) | |
147 | * On error, returns -1 | |
148 | */ | |
149 | static int send_session_varlen(void *data, size_t len) | |
150 | { | |
151 | int ret; | |
152 | ||
153 | if (!connected) { | |
2f70b271 | 154 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
155 | goto end; |
156 | } | |
a4b92340 | 157 | |
53a80697 MD |
158 | if (!data || !len) { |
159 | ret = 0; | |
160 | goto end; | |
161 | } | |
162 | ||
163 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
164 | if (ret < 0) { |
165 | ret = -LTTNG_ERR_FATAL; | |
166 | } | |
53a80697 MD |
167 | |
168 | end: | |
169 | return ret; | |
170 | } | |
171 | ||
e065084a | 172 | /* |
cd80958d | 173 | * Receive data from the sessiond socket. |
e065084a | 174 | * |
1c8d13c8 TD |
175 | * On success, returns the number of bytes received (>=0) |
176 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 177 | */ |
ca95a216 | 178 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
179 | { |
180 | int ret; | |
181 | ||
182 | if (!connected) { | |
2f70b271 | 183 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 184 | goto end; |
fac6795d DG |
185 | } |
186 | ||
ca95a216 | 187 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
188 | if (ret < 0) { |
189 | ret = -LTTNG_ERR_FATAL; | |
190 | } | |
fac6795d | 191 | |
e065084a | 192 | end: |
fac6795d DG |
193 | return ret; |
194 | } | |
195 | ||
196 | /* | |
1c8d13c8 | 197 | * Check if we are in the specified group. |
65beb5ff | 198 | * |
2269e89e | 199 | * If yes return 1, else return -1. |
947308c4 DG |
200 | */ |
201 | static int check_tracing_group(const char *grp_name) | |
202 | { | |
203 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
204 | gid_t *grp_list; | |
205 | int grp_list_size, grp_id, i; | |
206 | int ret = -1; | |
207 | ||
208 | /* Get GID of group 'tracing' */ | |
209 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
210 | if (!grp_tracing) { |
211 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
212 | goto end; |
213 | } | |
214 | ||
215 | /* Get number of supplementary group IDs */ | |
216 | grp_list_size = getgroups(0, NULL); | |
217 | if (grp_list_size < 0) { | |
218 | perror("getgroups"); | |
219 | goto end; | |
220 | } | |
221 | ||
222 | /* Alloc group list of the right size */ | |
223 | grp_list = malloc(grp_list_size * sizeof(gid_t)); | |
00795392 | 224 | if (!grp_list) { |
1c8d13c8 | 225 | perror("malloc"); |
00795392 MD |
226 | goto end; |
227 | } | |
947308c4 | 228 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 229 | if (grp_id < 0) { |
947308c4 DG |
230 | perror("getgroups"); |
231 | goto free_list; | |
232 | } | |
233 | ||
234 | for (i = 0; i < grp_list_size; i++) { | |
235 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 236 | ret = 1; |
947308c4 DG |
237 | break; |
238 | } | |
239 | } | |
240 | ||
241 | free_list: | |
242 | free(grp_list); | |
243 | ||
244 | end: | |
245 | return ret; | |
246 | } | |
247 | ||
248 | /* | |
2269e89e DG |
249 | * Try connect to session daemon with sock_path. |
250 | * | |
251 | * Return 0 on success, else -1 | |
252 | */ | |
253 | static int try_connect_sessiond(const char *sock_path) | |
254 | { | |
255 | int ret; | |
256 | ||
257 | /* If socket exist, we check if the daemon listens for connect. */ | |
258 | ret = access(sock_path, F_OK); | |
259 | if (ret < 0) { | |
260 | /* Not alive */ | |
2f70b271 | 261 | goto error; |
2269e89e DG |
262 | } |
263 | ||
264 | ret = lttcomm_connect_unix_sock(sock_path); | |
265 | if (ret < 0) { | |
266 | /* Not alive */ | |
2f70b271 | 267 | goto error; |
2269e89e DG |
268 | } |
269 | ||
270 | ret = lttcomm_close_unix_sock(ret); | |
271 | if (ret < 0) { | |
272 | perror("lttcomm_close_unix_sock"); | |
273 | } | |
274 | ||
275 | return 0; | |
2f70b271 DG |
276 | |
277 | error: | |
278 | return -1; | |
2269e89e DG |
279 | } |
280 | ||
281 | /* | |
2f70b271 DG |
282 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
283 | * variable. | |
284 | * | |
285 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
286 | * is somehow too long or ENOMEM). | |
947308c4 DG |
287 | */ |
288 | static int set_session_daemon_path(void) | |
289 | { | |
2269e89e DG |
290 | int in_tgroup = 0; /* In tracing group */ |
291 | uid_t uid; | |
292 | ||
293 | uid = getuid(); | |
947308c4 | 294 | |
2269e89e DG |
295 | if (uid != 0) { |
296 | /* Are we in the tracing group ? */ | |
297 | in_tgroup = check_tracing_group(tracing_group); | |
298 | } | |
299 | ||
08a9c49f | 300 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
301 | lttng_ctl_copy_string(sessiond_sock_path, |
302 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 303 | } |
2269e89e | 304 | |
08a9c49f | 305 | if (uid != 0) { |
c617c0c6 MD |
306 | int ret; |
307 | ||
08a9c49f TD |
308 | if (in_tgroup) { |
309 | /* Tracing group */ | |
310 | ret = try_connect_sessiond(sessiond_sock_path); | |
311 | if (ret >= 0) { | |
312 | goto end; | |
2269e89e | 313 | } |
08a9c49f | 314 | /* Global session daemon not available... */ |
2269e89e | 315 | } |
08a9c49f TD |
316 | /* ...or not in tracing group (and not root), default */ |
317 | ||
318 | /* | |
319 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
320 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
321 | */ | |
322 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 323 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 324 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 325 | goto error; |
947308c4 | 326 | } |
947308c4 | 327 | } |
08a9c49f | 328 | end: |
947308c4 | 329 | return 0; |
2f70b271 DG |
330 | |
331 | error: | |
332 | return -1; | |
947308c4 DG |
333 | } |
334 | ||
65beb5ff DG |
335 | /* |
336 | * Connect to the LTTng session daemon. | |
337 | * | |
338 | * On success, return 0. On error, return -1. | |
339 | */ | |
340 | static int connect_sessiond(void) | |
341 | { | |
342 | int ret; | |
343 | ||
da3c9ec1 DG |
344 | /* Don't try to connect if already connected. */ |
345 | if (connected) { | |
346 | return 0; | |
347 | } | |
348 | ||
65beb5ff DG |
349 | ret = set_session_daemon_path(); |
350 | if (ret < 0) { | |
2f70b271 | 351 | goto error; |
65beb5ff DG |
352 | } |
353 | ||
354 | /* Connect to the sesssion daemon */ | |
355 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); | |
356 | if (ret < 0) { | |
2f70b271 | 357 | goto error; |
65beb5ff DG |
358 | } |
359 | ||
360 | sessiond_socket = ret; | |
361 | connected = 1; | |
362 | ||
363 | return 0; | |
2f70b271 DG |
364 | |
365 | error: | |
366 | return -1; | |
65beb5ff DG |
367 | } |
368 | ||
369 | /* | |
1c8d13c8 TD |
370 | * Clean disconnect from the session daemon. |
371 | * On success, return 0. On error, return -1. | |
65beb5ff DG |
372 | */ |
373 | static int disconnect_sessiond(void) | |
374 | { | |
375 | int ret = 0; | |
376 | ||
377 | if (connected) { | |
378 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
379 | sessiond_socket = 0; | |
380 | connected = 0; | |
381 | } | |
382 | ||
383 | return ret; | |
384 | } | |
385 | ||
35a6fdb7 | 386 | /* |
cd80958d | 387 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 388 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 389 | * |
af87c45a | 390 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 391 | */ |
cac3069d DG |
392 | LTTNG_HIDDEN |
393 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
a4b92340 | 394 | void *vardata, size_t varlen, void **buf) |
65beb5ff DG |
395 | { |
396 | int ret; | |
397 | size_t size; | |
398 | void *data = NULL; | |
cd80958d | 399 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
400 | |
401 | ret = connect_sessiond(); | |
402 | if (ret < 0) { | |
2f70b271 | 403 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
404 | goto end; |
405 | } | |
406 | ||
65beb5ff | 407 | /* Send command to session daemon */ |
cd80958d | 408 | ret = send_session_msg(lsm); |
65beb5ff | 409 | if (ret < 0) { |
2f70b271 | 410 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
411 | goto end; |
412 | } | |
53a80697 MD |
413 | /* Send var len data */ |
414 | ret = send_session_varlen(vardata, varlen); | |
415 | if (ret < 0) { | |
2f70b271 | 416 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
417 | goto end; |
418 | } | |
65beb5ff DG |
419 | |
420 | /* Get header from data transmission */ | |
421 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
422 | if (ret < 0) { | |
2f70b271 | 423 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
424 | goto end; |
425 | } | |
426 | ||
427 | /* Check error code if OK */ | |
f73fabfd | 428 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
429 | ret = -llm.ret_code; |
430 | goto end; | |
431 | } | |
432 | ||
433 | size = llm.data_size; | |
434 | if (size == 0) { | |
874d3f84 | 435 | /* If client free with size 0 */ |
a45d5536 DG |
436 | if (buf != NULL) { |
437 | *buf = NULL; | |
438 | } | |
7d29a247 | 439 | ret = 0; |
65beb5ff DG |
440 | goto end; |
441 | } | |
442 | ||
443 | data = (void*) malloc(size); | |
444 | ||
445 | /* Get payload data */ | |
446 | ret = recv_data_sessiond(data, size); | |
447 | if (ret < 0) { | |
448 | free(data); | |
449 | goto end; | |
450 | } | |
451 | ||
83009e5e DG |
452 | /* |
453 | * Extra protection not to dereference a NULL pointer. If buf is NULL at | |
454 | * this point, an error is returned and data is freed. | |
455 | */ | |
456 | if (buf == NULL) { | |
2f70b271 | 457 | ret = -LTTNG_ERR_INVALID; |
83009e5e DG |
458 | free(data); |
459 | goto end; | |
460 | } | |
461 | ||
65beb5ff DG |
462 | *buf = data; |
463 | ret = size; | |
464 | ||
465 | end: | |
466 | disconnect_sessiond(); | |
467 | return ret; | |
468 | } | |
469 | ||
9f19cc17 | 470 | /* |
cd80958d | 471 | * Create lttng handle and return pointer. |
1c8d13c8 | 472 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 473 | */ |
cd80958d DG |
474 | struct lttng_handle *lttng_create_handle(const char *session_name, |
475 | struct lttng_domain *domain) | |
9f19cc17 | 476 | { |
2f70b271 DG |
477 | struct lttng_handle *handle = NULL; |
478 | ||
479 | if (domain == NULL) { | |
480 | goto end; | |
481 | } | |
cd80958d DG |
482 | |
483 | handle = malloc(sizeof(struct lttng_handle)); | |
484 | if (handle == NULL) { | |
2f70b271 | 485 | PERROR("malloc handle"); |
cd80958d DG |
486 | goto end; |
487 | } | |
488 | ||
489 | /* Copy session name */ | |
cac3069d | 490 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
491 | sizeof(handle->session_name)); |
492 | ||
493 | /* Copy lttng domain */ | |
cac3069d | 494 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); |
cd80958d DG |
495 | |
496 | end: | |
497 | return handle; | |
498 | } | |
499 | ||
500 | /* | |
501 | * Destroy handle by free(3) the pointer. | |
502 | */ | |
503 | void lttng_destroy_handle(struct lttng_handle *handle) | |
504 | { | |
0e428499 | 505 | free(handle); |
eb354453 DG |
506 | } |
507 | ||
d9800920 DG |
508 | /* |
509 | * Register an outside consumer. | |
1c8d13c8 | 510 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
511 | */ |
512 | int lttng_register_consumer(struct lttng_handle *handle, | |
513 | const char *socket_path) | |
514 | { | |
515 | struct lttcomm_session_msg lsm; | |
516 | ||
2f70b271 DG |
517 | if (handle == NULL || socket_path == NULL) { |
518 | return -LTTNG_ERR_INVALID; | |
519 | } | |
520 | ||
d9800920 | 521 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 522 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 523 | sizeof(lsm.session.name)); |
cac3069d | 524 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 525 | |
cac3069d | 526 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
d9800920 | 527 | |
cac3069d | 528 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
529 | } |
530 | ||
1df4dedd | 531 | /* |
1c8d13c8 TD |
532 | * Start tracing for all traces of the session. |
533 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 534 | */ |
6a4f824d | 535 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 536 | { |
cd80958d DG |
537 | struct lttcomm_session_msg lsm; |
538 | ||
6a4f824d | 539 | if (session_name == NULL) { |
2f70b271 | 540 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
541 | } |
542 | ||
543 | lsm.cmd_type = LTTNG_START_TRACE; | |
6a4f824d | 544 | |
cac3069d DG |
545 | lttng_ctl_copy_string(lsm.session.name, session_name, |
546 | sizeof(lsm.session.name)); | |
cd80958d | 547 | |
cac3069d | 548 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 549 | } |
1df4dedd DG |
550 | |
551 | /* | |
38ee087f | 552 | * Stop tracing for all traces of the session. |
f3ed775e | 553 | */ |
38ee087f | 554 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 555 | { |
38ee087f | 556 | int ret, data_ret; |
cd80958d DG |
557 | struct lttcomm_session_msg lsm; |
558 | ||
6a4f824d | 559 | if (session_name == NULL) { |
2f70b271 | 560 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
561 | } |
562 | ||
cd80958d | 563 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 564 | |
cac3069d DG |
565 | lttng_ctl_copy_string(lsm.session.name, session_name, |
566 | sizeof(lsm.session.name)); | |
cd80958d | 567 | |
cac3069d | 568 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
569 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
570 | goto error; | |
571 | } | |
572 | ||
573 | if (!wait) { | |
574 | goto end; | |
575 | } | |
576 | ||
577 | _MSG("Waiting for data availability"); | |
b7a81c24 | 578 | fflush(stdout); |
38ee087f DG |
579 | |
580 | /* Check for data availability */ | |
581 | do { | |
6d805429 | 582 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
583 | if (data_ret < 0) { |
584 | /* Return the data available call error. */ | |
585 | ret = data_ret; | |
586 | goto error; | |
587 | } | |
588 | ||
589 | /* | |
590 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
591 | * returned value indicates availability. | |
592 | */ | |
6d805429 | 593 | if (data_ret) { |
38ee087f DG |
594 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
595 | _MSG("."); | |
b7a81c24 | 596 | fflush(stdout); |
38ee087f | 597 | } |
6d805429 | 598 | } while (data_ret != 0); |
38ee087f DG |
599 | |
600 | MSG(""); | |
601 | ||
602 | end: | |
603 | error: | |
604 | return ret; | |
605 | } | |
606 | ||
607 | /* | |
608 | * Stop tracing and wait for data availability. | |
609 | */ | |
610 | int lttng_stop_tracing(const char *session_name) | |
611 | { | |
612 | return _lttng_stop_tracing(session_name, 1); | |
613 | } | |
614 | ||
615 | /* | |
616 | * Stop tracing but _don't_ wait for data availability. | |
617 | */ | |
618 | int lttng_stop_tracing_no_wait(const char *session_name) | |
619 | { | |
620 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
621 | } |
622 | ||
623 | /* | |
601d5acf DG |
624 | * Add context to a channel. |
625 | * | |
626 | * If the given channel is NULL, add the contexts to all channels. | |
627 | * The event_name param is ignored. | |
af87c45a DG |
628 | * |
629 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 630 | */ |
cd80958d | 631 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
632 | struct lttng_event_context *ctx, const char *event_name, |
633 | const char *channel_name) | |
d65106b1 | 634 | { |
cd80958d DG |
635 | struct lttcomm_session_msg lsm; |
636 | ||
9d697d3d DG |
637 | /* Safety check. Both are mandatory */ |
638 | if (handle == NULL || ctx == NULL) { | |
2f70b271 | 639 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
640 | } |
641 | ||
441c16a7 MD |
642 | memset(&lsm, 0, sizeof(lsm)); |
643 | ||
cd80958d DG |
644 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
645 | ||
85076754 MD |
646 | /* If no channel name, send empty string. */ |
647 | if (channel_name == NULL) { | |
648 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
649 | sizeof(lsm.u.context.channel_name)); | |
650 | } else { | |
651 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
652 | sizeof(lsm.u.context.channel_name)); | |
653 | } | |
cd80958d | 654 | |
cac3069d | 655 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d65106b1 | 656 | |
9d697d3d | 657 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); |
d65106b1 | 658 | |
cac3069d | 659 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
660 | sizeof(lsm.session.name)); |
661 | ||
cac3069d | 662 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d65106b1 DG |
663 | } |
664 | ||
f3ed775e | 665 | /* |
1c8d13c8 TD |
666 | * Enable event(s) for a channel. |
667 | * If no event name is specified, all events are enabled. | |
668 | * If no channel name is specified, the default 'channel0' is used. | |
669 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 670 | */ |
cd80958d | 671 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 672 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 673 | { |
cd80958d DG |
674 | struct lttcomm_session_msg lsm; |
675 | ||
5117eeec | 676 | if (handle == NULL || ev == NULL) { |
2f70b271 | 677 | return -LTTNG_ERR_INVALID; |
cd80958d | 678 | } |
33a2b854 | 679 | |
441c16a7 MD |
680 | memset(&lsm, 0, sizeof(lsm)); |
681 | ||
85076754 | 682 | /* If no channel name, send empty string. */ |
94cf3c47 | 683 | if (channel_name == NULL) { |
85076754 | 684 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", |
cd80958d | 685 | sizeof(lsm.u.enable.channel_name)); |
33a2b854 | 686 | } else { |
cac3069d | 687 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, |
cd80958d | 688 | sizeof(lsm.u.enable.channel_name)); |
eb354453 DG |
689 | } |
690 | ||
cac3069d | 691 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
0d0c377a | 692 | |
8c9ae521 | 693 | if (ev->name[0] != '\0') { |
cd80958d | 694 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
0d0c377a | 695 | } else { |
cd80958d | 696 | lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT; |
f3ed775e | 697 | } |
8c9ae521 | 698 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
f3ed775e | 699 | |
cac3069d | 700 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
701 | sizeof(lsm.session.name)); |
702 | ||
cac3069d | 703 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
1df4dedd DG |
704 | } |
705 | ||
53a80697 | 706 | /* |
025faf73 | 707 | * Create or enable an event with a filter expression. |
178191b3 | 708 | * |
53a80697 MD |
709 | * Return negative error value on error. |
710 | * Return size of returned session payload data if OK. | |
711 | */ | |
025faf73 | 712 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 713 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
714 | const char *filter_expression) |
715 | { | |
716 | struct lttcomm_session_msg lsm; | |
717 | struct filter_parser_ctx *ctx; | |
718 | FILE *fmem; | |
719 | int ret = 0; | |
720 | ||
52df2401 MD |
721 | if (!filter_expression) { |
722 | /* | |
723 | * Fall back to normal event enabling if no filter | |
724 | * specified. | |
725 | */ | |
726 | return lttng_enable_event(handle, event, channel_name); | |
727 | } | |
728 | ||
729 | /* | |
730 | * Empty filter string will always be rejected by the parser | |
731 | * anyway, so treat this corner-case early to eliminate | |
732 | * lttng_fmemopen error for 0-byte allocation. | |
733 | */ | |
734 | if (handle == NULL || filter_expression[0] == '\0') { | |
2f70b271 | 735 | return -LTTNG_ERR_INVALID; |
53a80697 MD |
736 | } |
737 | ||
53a80697 MD |
738 | /* |
739 | * casting const to non-const, as the underlying function will | |
740 | * use it in read-only mode. | |
741 | */ | |
742 | fmem = lttng_fmemopen((void *) filter_expression, | |
743 | strlen(filter_expression), "r"); | |
744 | if (!fmem) { | |
745 | fprintf(stderr, "Error opening memory as stream\n"); | |
ff7ef7b8 | 746 | return -LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
747 | } |
748 | ctx = filter_parser_ctx_alloc(fmem); | |
749 | if (!ctx) { | |
750 | fprintf(stderr, "Error allocating parser\n"); | |
ff7ef7b8 | 751 | ret = -LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
752 | goto alloc_error; |
753 | } | |
754 | ret = filter_parser_ctx_append_ast(ctx); | |
755 | if (ret) { | |
756 | fprintf(stderr, "Parse error\n"); | |
ff7ef7b8 | 757 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
758 | goto parse_error; |
759 | } | |
760 | ret = filter_visitor_set_parent(ctx); | |
761 | if (ret) { | |
762 | fprintf(stderr, "Set parent error\n"); | |
ff7ef7b8 | 763 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
764 | goto parse_error; |
765 | } | |
766 | if (print_xml) { | |
767 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
768 | if (ret) { | |
769 | fflush(stdout); | |
770 | fprintf(stderr, "XML print error\n"); | |
ff7ef7b8 | 771 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
772 | goto parse_error; |
773 | } | |
774 | } | |
775 | ||
776 | dbg_printf("Generating IR... "); | |
777 | fflush(stdout); | |
778 | ret = filter_visitor_ir_generate(ctx); | |
779 | if (ret) { | |
780 | fprintf(stderr, "Generate IR error\n"); | |
ff7ef7b8 | 781 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
782 | goto parse_error; |
783 | } | |
784 | dbg_printf("done\n"); | |
785 | ||
786 | dbg_printf("Validating IR... "); | |
787 | fflush(stdout); | |
788 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
789 | if (ret) { | |
ff7ef7b8 | 790 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
791 | goto parse_error; |
792 | } | |
793 | dbg_printf("done\n"); | |
794 | ||
795 | dbg_printf("Generating bytecode... "); | |
796 | fflush(stdout); | |
797 | ret = filter_visitor_bytecode_generate(ctx); | |
798 | if (ret) { | |
799 | fprintf(stderr, "Generate bytecode error\n"); | |
ff7ef7b8 | 800 | ret = -LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
801 | goto parse_error; |
802 | } | |
803 | dbg_printf("done\n"); | |
804 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
805 | bytecode_get_len(&ctx->bytecode->b)); | |
806 | ||
807 | memset(&lsm, 0, sizeof(lsm)); | |
808 | ||
025faf73 | 809 | lsm.cmd_type = LTTNG_ENABLE_EVENT_WITH_FILTER; |
53a80697 | 810 | |
85076754 MD |
811 | /* If no channel name, send empty string. */ |
812 | if (channel_name == NULL) { | |
813 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
814 | sizeof(lsm.u.enable.channel_name)); | |
815 | } else { | |
816 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
817 | sizeof(lsm.u.enable.channel_name)); | |
818 | } | |
819 | ||
53a80697 | 820 | /* Copy event name */ |
178191b3 DG |
821 | if (event) { |
822 | memcpy(&lsm.u.enable.event, event, sizeof(lsm.u.enable.event)); | |
823 | } | |
824 | ||
025faf73 | 825 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) |
53a80697 MD |
826 | + bytecode_get_len(&ctx->bytecode->b); |
827 | ||
cac3069d | 828 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
53a80697 | 829 | |
cac3069d | 830 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
53a80697 MD |
831 | sizeof(lsm.session.name)); |
832 | ||
cac3069d | 833 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, &ctx->bytecode->b, |
025faf73 | 834 | lsm.u.enable.bytecode_len, NULL); |
53a80697 MD |
835 | |
836 | filter_bytecode_free(ctx); | |
837 | filter_ir_free(ctx); | |
838 | filter_parser_ctx_free(ctx); | |
839 | if (fclose(fmem) != 0) { | |
840 | perror("fclose"); | |
841 | } | |
842 | return ret; | |
843 | ||
844 | parse_error: | |
845 | filter_bytecode_free(ctx); | |
846 | filter_ir_free(ctx); | |
847 | filter_parser_ctx_free(ctx); | |
848 | alloc_error: | |
849 | if (fclose(fmem) != 0) { | |
850 | perror("fclose"); | |
851 | } | |
852 | return ret; | |
853 | } | |
854 | ||
1df4dedd | 855 | /* |
1c8d13c8 TD |
856 | * Disable event(s) of a channel and domain. |
857 | * If no event name is specified, all events are disabled. | |
858 | * If no channel name is specified, the default 'channel0' is used. | |
859 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 860 | */ |
cd80958d | 861 | int lttng_disable_event(struct lttng_handle *handle, const char *name, |
38057ed1 | 862 | const char *channel_name) |
1df4dedd | 863 | { |
cd80958d | 864 | struct lttcomm_session_msg lsm; |
1df4dedd | 865 | |
9d697d3d | 866 | if (handle == NULL) { |
2f70b271 | 867 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
868 | } |
869 | ||
441c16a7 MD |
870 | memset(&lsm, 0, sizeof(lsm)); |
871 | ||
85076754 MD |
872 | /* If no channel name, send empty string. */ |
873 | if (channel_name == NULL) { | |
874 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 875 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 876 | } else { |
85076754 | 877 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 878 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
879 | } |
880 | ||
cac3069d | 881 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f5177a38 | 882 | |
f84efadf | 883 | if (name != NULL) { |
cac3069d DG |
884 | lttng_ctl_copy_string(lsm.u.disable.name, name, |
885 | sizeof(lsm.u.disable.name)); | |
cd80958d | 886 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f5177a38 | 887 | } else { |
cd80958d | 888 | lsm.cmd_type = LTTNG_DISABLE_ALL_EVENT; |
f3ed775e DG |
889 | } |
890 | ||
cac3069d | 891 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
892 | sizeof(lsm.session.name)); |
893 | ||
cac3069d | 894 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
1df4dedd DG |
895 | } |
896 | ||
897 | /* | |
1c8d13c8 TD |
898 | * Enable channel per domain |
899 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 900 | */ |
cd80958d | 901 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 902 | struct lttng_channel *chan) |
a5c5a2bd | 903 | { |
cd80958d DG |
904 | struct lttcomm_session_msg lsm; |
905 | ||
5117eeec DG |
906 | /* |
907 | * NULL arguments are forbidden. No default values. | |
908 | */ | |
909 | if (handle == NULL || chan == NULL) { | |
2f70b271 | 910 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
911 | } |
912 | ||
441c16a7 MD |
913 | memset(&lsm, 0, sizeof(lsm)); |
914 | ||
5117eeec | 915 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 916 | |
cd80958d DG |
917 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
918 | ||
cac3069d | 919 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 920 | |
cac3069d | 921 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
922 | sizeof(lsm.session.name)); |
923 | ||
cac3069d | 924 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 925 | } |
1df4dedd | 926 | |
2ef84c95 | 927 | /* |
1c8d13c8 TD |
928 | * All tracing will be stopped for registered events of the channel. |
929 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 930 | */ |
cd80958d | 931 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 932 | { |
cd80958d DG |
933 | struct lttcomm_session_msg lsm; |
934 | ||
9d697d3d DG |
935 | /* Safety check. Both are mandatory */ |
936 | if (handle == NULL || name == NULL) { | |
2f70b271 | 937 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
938 | } |
939 | ||
441c16a7 MD |
940 | memset(&lsm, 0, sizeof(lsm)); |
941 | ||
cd80958d | 942 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 943 | |
cac3069d | 944 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
945 | sizeof(lsm.u.disable.channel_name)); |
946 | ||
cac3069d | 947 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 948 | |
cac3069d | 949 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
950 | sizeof(lsm.session.name)); |
951 | ||
cac3069d | 952 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
953 | } |
954 | ||
fac6795d | 955 | /* |
1c8d13c8 TD |
956 | * Lists all available tracepoints of domain. |
957 | * Sets the contents of the events array. | |
958 | * Returns the number of lttng_event entries in events; | |
959 | * on error, returns a negative value. | |
fac6795d | 960 | */ |
cd80958d | 961 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 962 | struct lttng_event **events) |
fac6795d | 963 | { |
052da939 | 964 | int ret; |
cd80958d DG |
965 | struct lttcomm_session_msg lsm; |
966 | ||
9d697d3d | 967 | if (handle == NULL) { |
2f70b271 | 968 | return -LTTNG_ERR_INVALID; |
cd80958d | 969 | } |
fac6795d | 970 | |
cd80958d | 971 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 972 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 973 | |
cac3069d | 974 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
975 | if (ret < 0) { |
976 | return ret; | |
eb354453 | 977 | } |
fac6795d | 978 | |
9f19cc17 | 979 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
980 | } |
981 | ||
f37d259d MD |
982 | /* |
983 | * Lists all available tracepoint fields of domain. | |
984 | * Sets the contents of the event field array. | |
985 | * Returns the number of lttng_event_field entries in events; | |
986 | * on error, returns a negative value. | |
987 | */ | |
988 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
989 | struct lttng_event_field **fields) | |
990 | { | |
991 | int ret; | |
992 | struct lttcomm_session_msg lsm; | |
993 | ||
994 | if (handle == NULL) { | |
2f70b271 | 995 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
996 | } |
997 | ||
998 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; | |
cac3069d | 999 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1000 | |
cac3069d | 1001 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1002 | if (ret < 0) { |
1003 | return ret; | |
1004 | } | |
1005 | ||
1006 | return ret / sizeof(struct lttng_event_field); | |
1007 | } | |
1008 | ||
1657e9bb | 1009 | /* |
1c8d13c8 TD |
1010 | * Returns a human readable string describing |
1011 | * the error code (a negative value). | |
1657e9bb | 1012 | */ |
9a745bc7 | 1013 | const char *lttng_strerror(int code) |
1657e9bb | 1014 | { |
f73fabfd | 1015 | return error_get_str(code); |
1657e9bb DG |
1016 | } |
1017 | ||
aaf97519 | 1018 | /* |
a4b92340 DG |
1019 | * Create a brand new session using name and url for destination. |
1020 | * | |
f73fabfd | 1021 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1022 | */ |
a4b92340 | 1023 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1024 | { |
3dd05a85 | 1025 | int ret; |
a4b92340 | 1026 | ssize_t size; |
00e2e675 | 1027 | struct lttcomm_session_msg lsm; |
a4b92340 | 1028 | struct lttng_uri *uris = NULL; |
00e2e675 | 1029 | |
a4b92340 | 1030 | if (name == NULL) { |
2f70b271 | 1031 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1032 | } |
1033 | ||
a4b92340 | 1034 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1035 | |
a4b92340 | 1036 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1037 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1038 | |
1039 | /* There should never be a data URL */ | |
bc894455 | 1040 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1041 | if (size < 0) { |
2f70b271 | 1042 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1043 | } |
1044 | ||
a4b92340 DG |
1045 | lsm.u.uri.size = size; |
1046 | ||
cac3069d DG |
1047 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1048 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1049 | |
1050 | free(uris); | |
1051 | return ret; | |
00e2e675 DG |
1052 | } |
1053 | ||
8028d920 | 1054 | /* |
8028d920 | 1055 | * Destroy session using name. |
1c8d13c8 | 1056 | * Returns size of returned session payload data or a negative error code. |
8028d920 | 1057 | */ |
843f5df9 | 1058 | int lttng_destroy_session(const char *session_name) |
8028d920 | 1059 | { |
cd80958d DG |
1060 | struct lttcomm_session_msg lsm; |
1061 | ||
843f5df9 | 1062 | if (session_name == NULL) { |
2f70b271 | 1063 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1064 | } |
1065 | ||
1066 | lsm.cmd_type = LTTNG_DESTROY_SESSION; | |
843f5df9 | 1067 | |
cac3069d DG |
1068 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1069 | sizeof(lsm.session.name)); | |
cd80958d | 1070 | |
cac3069d | 1071 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1072 | } |
1073 | ||
57167058 | 1074 | /* |
57167058 | 1075 | * Ask the session daemon for all available sessions. |
1c8d13c8 TD |
1076 | * Sets the contents of the sessions array. |
1077 | * Returns the number of lttng_session entries in sessions; | |
1078 | * on error, returns a negative value. | |
57167058 | 1079 | */ |
ca95a216 | 1080 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1081 | { |
ca95a216 | 1082 | int ret; |
cd80958d | 1083 | struct lttcomm_session_msg lsm; |
57167058 | 1084 | |
cd80958d | 1085 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1086 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1087 | if (ret < 0) { |
ca95a216 | 1088 | return ret; |
57167058 DG |
1089 | } |
1090 | ||
ca95a216 | 1091 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1092 | } |
1093 | ||
9f19cc17 | 1094 | /* |
1c8d13c8 TD |
1095 | * Ask the session daemon for all available domains of a session. |
1096 | * Sets the contents of the domains array. | |
1097 | * Returns the number of lttng_domain entries in domains; | |
1098 | * on error, returns a negative value. | |
9f19cc17 | 1099 | */ |
330be774 | 1100 | int lttng_list_domains(const char *session_name, |
cd80958d | 1101 | struct lttng_domain **domains) |
9f19cc17 DG |
1102 | { |
1103 | int ret; | |
cd80958d DG |
1104 | struct lttcomm_session_msg lsm; |
1105 | ||
330be774 | 1106 | if (session_name == NULL) { |
2f70b271 | 1107 | return -LTTNG_ERR_INVALID; |
cd80958d | 1108 | } |
9f19cc17 | 1109 | |
cd80958d DG |
1110 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1111 | ||
cac3069d DG |
1112 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1113 | sizeof(lsm.session.name)); | |
cd80958d | 1114 | |
cac3069d | 1115 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1116 | if (ret < 0) { |
1117 | return ret; | |
1118 | } | |
1119 | ||
1120 | return ret / sizeof(struct lttng_domain); | |
1121 | } | |
1122 | ||
1123 | /* | |
1c8d13c8 TD |
1124 | * Ask the session daemon for all available channels of a session. |
1125 | * Sets the contents of the channels array. | |
1126 | * Returns the number of lttng_channel entries in channels; | |
1127 | * on error, returns a negative value. | |
9f19cc17 | 1128 | */ |
cd80958d DG |
1129 | int lttng_list_channels(struct lttng_handle *handle, |
1130 | struct lttng_channel **channels) | |
9f19cc17 DG |
1131 | { |
1132 | int ret; | |
cd80958d DG |
1133 | struct lttcomm_session_msg lsm; |
1134 | ||
9d697d3d | 1135 | if (handle == NULL) { |
2f70b271 | 1136 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1137 | } |
1138 | ||
1139 | lsm.cmd_type = LTTNG_LIST_CHANNELS; | |
cac3069d | 1140 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1141 | sizeof(lsm.session.name)); |
9f19cc17 | 1142 | |
cac3069d | 1143 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1144 | |
cac3069d | 1145 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1146 | if (ret < 0) { |
1147 | return ret; | |
1148 | } | |
1149 | ||
1150 | return ret / sizeof(struct lttng_channel); | |
1151 | } | |
1152 | ||
1153 | /* | |
1c8d13c8 TD |
1154 | * Ask the session daemon for all available events of a session channel. |
1155 | * Sets the contents of the events array. | |
1156 | * Returns the number of lttng_event entries in events; | |
1157 | * on error, returns a negative value. | |
9f19cc17 | 1158 | */ |
cd80958d DG |
1159 | int lttng_list_events(struct lttng_handle *handle, |
1160 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1161 | { |
1162 | int ret; | |
cd80958d | 1163 | struct lttcomm_session_msg lsm; |
9f19cc17 | 1164 | |
9d697d3d DG |
1165 | /* Safety check. An handle and channel name are mandatory */ |
1166 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1167 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1168 | } |
1169 | ||
1170 | lsm.cmd_type = LTTNG_LIST_EVENTS; | |
cac3069d | 1171 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1172 | sizeof(lsm.session.name)); |
cac3069d | 1173 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d DG |
1174 | sizeof(lsm.u.list.channel_name)); |
1175 | ||
cac3069d | 1176 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1177 | |
cac3069d | 1178 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) events); |
9f19cc17 DG |
1179 | if (ret < 0) { |
1180 | return ret; | |
1181 | } | |
1182 | ||
1183 | return ret / sizeof(struct lttng_event); | |
1184 | } | |
1185 | ||
fac6795d | 1186 | /* |
1c8d13c8 TD |
1187 | * Sets the tracing_group variable with name. |
1188 | * This function allocates memory pointed to by tracing_group. | |
1189 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1190 | */ |
1191 | int lttng_set_tracing_group(const char *name) | |
1192 | { | |
9d697d3d | 1193 | if (name == NULL) { |
2f70b271 | 1194 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1195 | } |
1196 | ||
fac6795d | 1197 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1198 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1199 | } |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | ||
d0254c7c | 1204 | /* |
af87c45a | 1205 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1206 | */ |
cd80958d | 1207 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1208 | struct lttng_calibrate *calibrate) |
1209 | { | |
cd80958d | 1210 | struct lttcomm_session_msg lsm; |
d0254c7c | 1211 | |
9d697d3d DG |
1212 | /* Safety check. NULL pointer are forbidden */ |
1213 | if (handle == NULL || calibrate == NULL) { | |
2f70b271 | 1214 | return -LTTNG_ERR_INVALID; |
cd80958d | 1215 | } |
d0254c7c | 1216 | |
cd80958d | 1217 | lsm.cmd_type = LTTNG_CALIBRATE; |
cac3069d | 1218 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d0254c7c | 1219 | |
cd80958d DG |
1220 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1221 | ||
cac3069d | 1222 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d0254c7c MD |
1223 | } |
1224 | ||
5edd7e09 DG |
1225 | /* |
1226 | * Set default channel attributes. | |
441c16a7 | 1227 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1228 | */ |
1229 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1230 | struct lttng_channel_attr *attr) | |
1231 | { | |
1232 | /* Safety check */ | |
1233 | if (attr == NULL || domain == NULL) { | |
1234 | return; | |
1235 | } | |
1236 | ||
eacaa7a6 DS |
1237 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1238 | ||
0a9c6494 DG |
1239 | /* Same for all domains. */ |
1240 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1241 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1242 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1243 | ||
5edd7e09 DG |
1244 | switch (domain->type) { |
1245 | case LTTNG_DOMAIN_KERNEL: | |
d92ff3ef DG |
1246 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
1247 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
3e230f92 | 1248 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1249 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1250 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1251 | break; | |
1252 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1253 | switch (domain->buf_type) { |
1254 | case LTTNG_BUFFER_PER_UID: | |
1255 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1256 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1257 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
1258 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1259 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
1260 | break; | |
1261 | case LTTNG_BUFFER_PER_PID: | |
1262 | default: | |
1263 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1264 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1265 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
1266 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1267 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
1268 | break; | |
1269 | } | |
5edd7e09 | 1270 | default: |
441c16a7 | 1271 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1272 | break; |
1273 | } | |
1274 | } | |
1275 | ||
fac6795d | 1276 | /* |
2269e89e | 1277 | * Check if session daemon is alive. |
fac6795d | 1278 | * |
2269e89e | 1279 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1280 | * On error returns a negative value. |
fac6795d | 1281 | */ |
947308c4 | 1282 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1283 | { |
1284 | int ret; | |
1285 | ||
1286 | ret = set_session_daemon_path(); | |
1287 | if (ret < 0) { | |
947308c4 | 1288 | /* Error */ |
fac6795d DG |
1289 | return ret; |
1290 | } | |
1291 | ||
9d035200 | 1292 | if (*sessiond_sock_path == '\0') { |
2f70b271 DG |
1293 | /* |
1294 | * No socket path set. Weird error which means the constructor was not | |
1295 | * called. | |
1296 | */ | |
1297 | assert(0); | |
fac6795d DG |
1298 | } |
1299 | ||
2269e89e | 1300 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 MD |
1301 | if (ret < 0) { |
1302 | /* Not alive */ | |
1303 | return 0; | |
1304 | } | |
7d8234d9 | 1305 | |
947308c4 DG |
1306 | /* Is alive */ |
1307 | return 1; | |
fac6795d DG |
1308 | } |
1309 | ||
00e2e675 | 1310 | /* |
a4b92340 | 1311 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
1312 | * |
1313 | * Return 0 on success, else a negative value. | |
1314 | */ | |
a4b92340 DG |
1315 | int lttng_set_consumer_url(struct lttng_handle *handle, |
1316 | const char *control_url, const char *data_url) | |
00e2e675 | 1317 | { |
3dd05a85 | 1318 | int ret; |
a4b92340 | 1319 | ssize_t size; |
00e2e675 | 1320 | struct lttcomm_session_msg lsm; |
a4b92340 | 1321 | struct lttng_uri *uris = NULL; |
00e2e675 | 1322 | |
a4b92340 | 1323 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 1324 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1325 | } |
1326 | ||
a4b92340 DG |
1327 | memset(&lsm, 0, sizeof(lsm)); |
1328 | ||
00e2e675 DG |
1329 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
1330 | ||
cac3069d | 1331 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 1332 | sizeof(lsm.session.name)); |
cac3069d | 1333 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 1334 | |
bc894455 | 1335 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 1336 | if (size < 0) { |
2f70b271 | 1337 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
1338 | } |
1339 | ||
1340 | lsm.u.uri.size = size; | |
00e2e675 | 1341 | |
cac3069d DG |
1342 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1343 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1344 | |
1345 | free(uris); | |
1346 | return ret; | |
00e2e675 DG |
1347 | } |
1348 | ||
1349 | /* | |
9c6bda17 | 1350 | * [OBSOLETE] |
00e2e675 DG |
1351 | */ |
1352 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1353 | { | |
785d2d0d | 1354 | return -ENOSYS; |
00e2e675 DG |
1355 | } |
1356 | ||
1357 | /* | |
9c6bda17 | 1358 | * [OBSOLETE] |
00e2e675 DG |
1359 | */ |
1360 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1361 | { | |
785d2d0d | 1362 | return -ENOSYS; |
00e2e675 DG |
1363 | } |
1364 | ||
44a5e5eb DG |
1365 | /* |
1366 | * Set health socket path by putting it in the global health_sock_path | |
1367 | * variable. | |
1368 | * | |
ffb2a2f4 | 1369 | * Returns 0 on success or -ENOMEM. |
44a5e5eb DG |
1370 | */ |
1371 | static int set_health_socket_path(void) | |
1372 | { | |
44a5e5eb DG |
1373 | uid_t uid; |
1374 | const char *home; | |
ffb2a2f4 | 1375 | int ret; |
44a5e5eb DG |
1376 | |
1377 | uid = getuid(); | |
1378 | ||
ffb2a2f4 | 1379 | if (uid == 0 || check_tracing_group(tracing_group)) { |
cac3069d DG |
1380 | lttng_ctl_copy_string(health_sock_path, |
1381 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK, sizeof(health_sock_path)); | |
ffb2a2f4 | 1382 | return 0; |
44a5e5eb DG |
1383 | } |
1384 | ||
ffb2a2f4 MD |
1385 | /* |
1386 | * With GNU C < 2.1, snprintf returns -1 if the target buffer | |
1387 | * is too small; With GNU C >= 2.1, snprintf returns the | |
1388 | * required size (excluding closing null). | |
1389 | */ | |
1390 | home = utils_get_home_dir(); | |
1391 | if (home == NULL) { | |
1392 | /* Fallback in /tmp */ | |
1393 | home = "/tmp"; | |
1394 | } | |
44a5e5eb | 1395 | |
ffb2a2f4 MD |
1396 | ret = snprintf(health_sock_path, sizeof(health_sock_path), |
1397 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home); | |
1398 | if ((ret < 0) || (ret >= sizeof(health_sock_path))) { | |
1399 | return -ENOMEM; | |
44a5e5eb DG |
1400 | } |
1401 | ||
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | /* | |
1406 | * Check session daemon health for a specific health component. | |
1407 | * | |
2f70b271 | 1408 | * Return 0 if health is OK or else 1 if BAD. |
44a5e5eb | 1409 | * |
2f70b271 | 1410 | * Any other negative value is a lttng error code which can be translated with |
44a5e5eb DG |
1411 | * lttng_strerror(). |
1412 | */ | |
1413 | int lttng_health_check(enum lttng_health_component c) | |
1414 | { | |
1415 | int sock, ret; | |
0c89d795 MD |
1416 | struct health_comm_msg msg; |
1417 | struct health_comm_reply reply; | |
44a5e5eb DG |
1418 | |
1419 | /* Connect to the sesssion daemon */ | |
1420 | sock = lttcomm_connect_unix_sock(health_sock_path); | |
1421 | if (sock < 0) { | |
2f70b271 | 1422 | ret = -LTTNG_ERR_NO_SESSIOND; |
44a5e5eb DG |
1423 | goto error; |
1424 | } | |
1425 | ||
0c89d795 | 1426 | msg.cmd = HEALTH_CMD_CHECK; |
44a5e5eb DG |
1427 | msg.component = c; |
1428 | ||
1429 | ret = lttcomm_send_unix_sock(sock, (void *)&msg, sizeof(msg)); | |
1430 | if (ret < 0) { | |
2f70b271 | 1431 | ret = -LTTNG_ERR_FATAL; |
44a5e5eb DG |
1432 | goto close_error; |
1433 | } | |
1434 | ||
1435 | ret = lttcomm_recv_unix_sock(sock, (void *)&reply, sizeof(reply)); | |
1436 | if (ret < 0) { | |
2f70b271 | 1437 | ret = -LTTNG_ERR_FATAL; |
44a5e5eb DG |
1438 | goto close_error; |
1439 | } | |
1440 | ||
1441 | ret = reply.ret_code; | |
1442 | ||
1443 | close_error: | |
67ef15b7 MD |
1444 | { |
1445 | int closeret; | |
1446 | ||
1447 | closeret = close(sock); | |
1448 | assert(!closeret); | |
1449 | } | |
44a5e5eb DG |
1450 | |
1451 | error: | |
1452 | return ret; | |
1453 | } | |
1454 | ||
07424f16 DG |
1455 | /* |
1456 | * This is an extension of create session that is ONLY and SHOULD only be used | |
1457 | * by the lttng command line program. It exists to avoid using URI parsing in | |
1458 | * the lttng client. | |
1459 | * | |
1460 | * We need the date and time for the trace path subdirectory for the case where | |
1461 | * the user does NOT define one using either -o or -U. Using the normal | |
1462 | * lttng_create_session API call, we have no clue on the session daemon side if | |
1463 | * the URL was generated automatically by the client or define by the user. | |
1464 | * | |
1465 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
1466 | * string and appends it if necessary to the URI subdirectory before sending it | |
1467 | * to the session daemon. | |
1468 | * | |
1469 | * With this extra function, the lttng_create_session call behavior is not | |
1470 | * changed and the timestamp is appended to the URI on the session daemon side | |
1471 | * if necessary. | |
1472 | */ | |
1473 | int _lttng_create_session_ext(const char *name, const char *url, | |
1474 | const char *datetime) | |
1475 | { | |
3dd05a85 | 1476 | int ret; |
07424f16 DG |
1477 | ssize_t size; |
1478 | struct lttcomm_session_msg lsm; | |
1479 | struct lttng_uri *uris = NULL; | |
1480 | ||
2bba9e53 | 1481 | if (name == NULL || datetime == NULL) { |
2f70b271 | 1482 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
1483 | } |
1484 | ||
1485 | memset(&lsm, 0, sizeof(lsm)); | |
1486 | ||
1487 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 1488 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 DG |
1489 | |
1490 | /* There should never be a data URL */ | |
bc894455 | 1491 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 1492 | if (size < 0) { |
3dd05a85 DG |
1493 | ret = -LTTNG_ERR_INVALID; |
1494 | goto error; | |
07424f16 DG |
1495 | } |
1496 | ||
1497 | lsm.u.uri.size = size; | |
1498 | ||
4b35a6b3 | 1499 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
1500 | /* Don't append datetime if the name was automatically created. */ |
1501 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
1502 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
1503 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
1504 | name, datetime); | |
1505 | } else { | |
1506 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
1507 | } | |
07424f16 DG |
1508 | if (ret < 0) { |
1509 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
1510 | ret = -LTTNG_ERR_FATAL; |
1511 | goto error; | |
07424f16 DG |
1512 | } |
1513 | } | |
1514 | ||
cac3069d DG |
1515 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1516 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1517 | |
1518 | error: | |
1519 | free(uris); | |
1520 | return ret; | |
07424f16 DG |
1521 | } |
1522 | ||
806e2684 DG |
1523 | /* |
1524 | * For a given session name, this call checks if the data is ready to be read | |
1525 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
1526 | * any readers. | |
1527 | */ | |
6d805429 | 1528 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
1529 | { |
1530 | int ret; | |
1531 | struct lttcomm_session_msg lsm; | |
1532 | ||
1533 | if (session_name == NULL) { | |
1534 | return -LTTNG_ERR_INVALID; | |
1535 | } | |
1536 | ||
6d805429 | 1537 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 1538 | |
cac3069d DG |
1539 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1540 | sizeof(lsm.session.name)); | |
806e2684 | 1541 | |
cac3069d | 1542 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
806e2684 DG |
1543 | |
1544 | /* | |
cac3069d DG |
1545 | * The lttng_ctl_ask_sessiond function negate the return code if it's not |
1546 | * LTTNG_OK so getting -1 means that the reply ret_code was 1 thus meaning | |
1547 | * that the data is available. Yes it is hackish but for now this is the | |
1548 | * only way. | |
806e2684 DG |
1549 | */ |
1550 | if (ret == -1) { | |
1551 | ret = 1; | |
1552 | } | |
1553 | ||
1554 | return ret; | |
1555 | } | |
1556 | ||
27babd3a DG |
1557 | /* |
1558 | * Create a session exclusively used for snapshot. | |
1559 | * | |
1560 | * Returns LTTNG_OK on success or a negative error code. | |
1561 | */ | |
1562 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1563 | { | |
1564 | int ret; | |
1565 | ssize_t size; | |
1566 | struct lttcomm_session_msg lsm; | |
1567 | struct lttng_uri *uris = NULL; | |
1568 | ||
1569 | if (name == NULL) { | |
1570 | return -LTTNG_ERR_INVALID; | |
1571 | } | |
1572 | ||
1573 | memset(&lsm, 0, sizeof(lsm)); | |
1574 | ||
1575 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
1576 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1577 | ||
1578 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1579 | if (size < 0) { | |
1580 | return -LTTNG_ERR_INVALID; | |
1581 | } | |
1582 | ||
1583 | lsm.u.uri.size = size; | |
1584 | ||
1585 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1586 | sizeof(struct lttng_uri) * size, NULL); | |
1587 | ||
1588 | free(uris); | |
1589 | return ret; | |
1590 | } | |
1591 | ||
ecc48a90 JD |
1592 | /* |
1593 | * Create a session exclusively used for live. | |
1594 | * | |
1595 | * Returns LTTNG_OK on success or a negative error code. | |
1596 | */ | |
1597 | int lttng_create_session_live(const char *name, const char *url, | |
1598 | unsigned int timer_interval) | |
1599 | { | |
1600 | int ret; | |
1601 | ssize_t size; | |
1602 | struct lttcomm_session_msg lsm; | |
1603 | struct lttng_uri *uris = NULL; | |
1604 | ||
1605 | if (name == NULL) { | |
1606 | return -LTTNG_ERR_INVALID; | |
1607 | } | |
1608 | ||
1609 | memset(&lsm, 0, sizeof(lsm)); | |
1610 | ||
1611 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
1612 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1613 | ||
1614 | size = uri_parse_str_urls(url, NULL, &uris); | |
1615 | if (size < 0) { | |
1616 | ret = -LTTNG_ERR_INVALID; | |
1617 | goto end; | |
1618 | } | |
1619 | ||
1620 | /* file:// is not accepted for live session. */ | |
1621 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
1622 | ret = -LTTNG_ERR_INVALID; | |
1623 | goto end; | |
1624 | } | |
1625 | ||
1626 | lsm.u.session_live.nb_uri = size; | |
1627 | lsm.u.session_live.timer_interval = timer_interval; | |
1628 | ||
1629 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1630 | sizeof(struct lttng_uri) * size, NULL); | |
1631 | ||
1632 | end: | |
1633 | free(uris); | |
1634 | return ret; | |
1635 | } | |
1636 | ||
fac6795d DG |
1637 | /* |
1638 | * lib constructor | |
1639 | */ | |
1640 | static void __attribute__((constructor)) init() | |
1641 | { | |
1642 | /* Set default session group */ | |
bbccc3d2 | 1643 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
44a5e5eb | 1644 | /* Set socket for health check */ |
ffb2a2f4 MD |
1645 | if (set_health_socket_path()) { |
1646 | abort(); | |
1647 | } | |
fac6795d | 1648 | } |
49cca668 DG |
1649 | |
1650 | /* | |
1651 | * lib destructor | |
1652 | */ | |
1653 | static void __attribute__((destructor)) lttng_ctl_exit() | |
1654 | { | |
1655 | free(tracing_group); | |
1656 | } |