Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
82a3637f DG |
2 | * liblttngctl.c |
3 | * | |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
fac6795d | 7 | * |
d14d33bf AM |
8 | * This library is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
10 | * as published by the Free Software Foundation. | |
82a3637f DG |
11 | * |
12 | * This library is distributed in the hope that it will be useful, | |
fac6795d | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
82a3637f DG |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. | |
16 | * | |
d14d33bf AM |
17 | * You should have received a copy of the GNU Lesser General Public License |
18 | * along with this library; if not, write to the Free Software Foundation, | |
19 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
fac6795d DG |
20 | */ |
21 | ||
22 | #define _GNU_SOURCE | |
44a5e5eb | 23 | #include <assert.h> |
fac6795d | 24 | #include <grp.h> |
1e307fab | 25 | #include <errno.h> |
fac6795d DG |
26 | #include <stdio.h> |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | ||
990570ed DG |
31 | #include <common/common.h> |
32 | #include <common/defaults.h> | |
db758600 | 33 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 34 | #include <common/uri.h> |
feb0f3e5 | 35 | #include <common/utils.h> |
1e307fab | 36 | #include <lttng/lttng.h> |
0c89d795 | 37 | #include <lttng/health-internal.h> |
fac6795d | 38 | |
d00c599e DG |
39 | #include "filter/filter-ast.h" |
40 | #include "filter/filter-parser.h" | |
41 | #include "filter/filter-bytecode.h" | |
42 | #include "filter/memstream.h" | |
cac3069d | 43 | #include "lttng-ctl-helper.h" |
53a80697 MD |
44 | |
45 | #ifdef DEBUG | |
d00c599e | 46 | static const int print_xml = 1; |
53a80697 MD |
47 | #define dbg_printf(fmt, args...) \ |
48 | printf("[debug liblttng-ctl] " fmt, ## args) | |
49 | #else | |
d00c599e | 50 | static const int print_xml = 0; |
53a80697 MD |
51 | #define dbg_printf(fmt, args...) \ |
52 | do { \ | |
53 | /* do nothing but check printf format */ \ | |
54 | if (0) \ | |
55 | printf("[debug liblttnctl] " fmt, ## args); \ | |
56 | } while (0) | |
57 | #endif | |
58 | ||
59 | ||
fac6795d DG |
60 | /* Socket to session daemon for communication */ |
61 | static int sessiond_socket; | |
62 | static char sessiond_sock_path[PATH_MAX]; | |
63 | ||
fac6795d DG |
64 | /* Variables */ |
65 | static char *tracing_group; | |
66 | static int connected; | |
67 | ||
97e19046 DG |
68 | /* Global */ |
69 | ||
70 | /* | |
71 | * Those two variables are used by error.h to silent or control the verbosity of | |
72 | * error message. They are global to the library so application linking with it | |
73 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
74 | */ |
75 | int lttng_opt_quiet; | |
76 | int lttng_opt_verbose; | |
c7e35b03 | 77 | int lttng_opt_mi; |
97e19046 | 78 | |
99497cd0 MD |
79 | /* |
80 | * Copy string from src to dst and enforce null terminated byte. | |
81 | */ | |
cac3069d DG |
82 | LTTNG_HIDDEN |
83 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 84 | { |
e7d6716d | 85 | if (src && dst) { |
99497cd0 MD |
86 | strncpy(dst, src, len); |
87 | /* Enforce the NULL terminated byte */ | |
88 | dst[len - 1] = '\0'; | |
cd80958d DG |
89 | } else if (dst) { |
90 | dst[0] = '\0'; | |
99497cd0 MD |
91 | } |
92 | } | |
93 | ||
fac6795d | 94 | /* |
cd80958d | 95 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 96 | * |
cd80958d DG |
97 | * If domain is unknown, default domain will be the kernel. |
98 | */ | |
cac3069d DG |
99 | LTTNG_HIDDEN |
100 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
101 | struct lttng_domain *src) | |
cd80958d DG |
102 | { |
103 | if (src && dst) { | |
104 | switch (src->type) { | |
00e2e675 DG |
105 | case LTTNG_DOMAIN_KERNEL: |
106 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 107 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 108 | case LTTNG_DOMAIN_LOG4J: |
00e2e675 DG |
109 | memcpy(dst, src, sizeof(struct lttng_domain)); |
110 | break; | |
111 | default: | |
112 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 113 | break; |
cd80958d DG |
114 | } |
115 | } | |
116 | } | |
117 | ||
118 | /* | |
119 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 120 | * |
1c8d13c8 TD |
121 | * On success, returns the number of bytes sent (>=0) |
122 | * On error, returns -1 | |
fac6795d | 123 | */ |
cd80958d | 124 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
125 | { |
126 | int ret; | |
127 | ||
128 | if (!connected) { | |
2f70b271 | 129 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 130 | goto end; |
fac6795d DG |
131 | } |
132 | ||
a4b92340 DG |
133 | DBG("LSM cmd type : %d", lsm->cmd_type); |
134 | ||
be040666 | 135 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 136 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
137 | if (ret < 0) { |
138 | ret = -LTTNG_ERR_FATAL; | |
139 | } | |
e065084a DG |
140 | |
141 | end: | |
142 | return ret; | |
143 | } | |
144 | ||
53a80697 MD |
145 | /* |
146 | * Send var len data to the session daemon. | |
147 | * | |
148 | * On success, returns the number of bytes sent (>=0) | |
149 | * On error, returns -1 | |
150 | */ | |
151 | static int send_session_varlen(void *data, size_t len) | |
152 | { | |
153 | int ret; | |
154 | ||
155 | if (!connected) { | |
2f70b271 | 156 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
157 | goto end; |
158 | } | |
a4b92340 | 159 | |
53a80697 MD |
160 | if (!data || !len) { |
161 | ret = 0; | |
162 | goto end; | |
163 | } | |
164 | ||
165 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
166 | if (ret < 0) { |
167 | ret = -LTTNG_ERR_FATAL; | |
168 | } | |
53a80697 MD |
169 | |
170 | end: | |
171 | return ret; | |
172 | } | |
173 | ||
e065084a | 174 | /* |
cd80958d | 175 | * Receive data from the sessiond socket. |
e065084a | 176 | * |
1c8d13c8 TD |
177 | * On success, returns the number of bytes received (>=0) |
178 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 179 | */ |
ca95a216 | 180 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
181 | { |
182 | int ret; | |
183 | ||
184 | if (!connected) { | |
2f70b271 | 185 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 186 | goto end; |
fac6795d DG |
187 | } |
188 | ||
ca95a216 | 189 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
190 | if (ret < 0) { |
191 | ret = -LTTNG_ERR_FATAL; | |
192 | } | |
fac6795d | 193 | |
e065084a | 194 | end: |
fac6795d DG |
195 | return ret; |
196 | } | |
197 | ||
198 | /* | |
1c8d13c8 | 199 | * Check if we are in the specified group. |
65beb5ff | 200 | * |
2269e89e | 201 | * If yes return 1, else return -1. |
947308c4 | 202 | */ |
6c71277b MD |
203 | LTTNG_HIDDEN |
204 | int lttng_check_tracing_group(void) | |
947308c4 DG |
205 | { |
206 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
207 | gid_t *grp_list; | |
208 | int grp_list_size, grp_id, i; | |
209 | int ret = -1; | |
6c71277b | 210 | const char *grp_name = tracing_group; |
947308c4 DG |
211 | |
212 | /* Get GID of group 'tracing' */ | |
213 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
214 | if (!grp_tracing) { |
215 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
216 | goto end; |
217 | } | |
218 | ||
219 | /* Get number of supplementary group IDs */ | |
220 | grp_list_size = getgroups(0, NULL); | |
221 | if (grp_list_size < 0) { | |
222 | perror("getgroups"); | |
223 | goto end; | |
224 | } | |
225 | ||
226 | /* Alloc group list of the right size */ | |
6b25c800 | 227 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 228 | if (!grp_list) { |
1c8d13c8 | 229 | perror("malloc"); |
00795392 MD |
230 | goto end; |
231 | } | |
947308c4 | 232 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 233 | if (grp_id < 0) { |
947308c4 DG |
234 | perror("getgroups"); |
235 | goto free_list; | |
236 | } | |
237 | ||
238 | for (i = 0; i < grp_list_size; i++) { | |
239 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 240 | ret = 1; |
947308c4 DG |
241 | break; |
242 | } | |
243 | } | |
244 | ||
245 | free_list: | |
246 | free(grp_list); | |
247 | ||
248 | end: | |
249 | return ret; | |
250 | } | |
251 | ||
252 | /* | |
2269e89e DG |
253 | * Try connect to session daemon with sock_path. |
254 | * | |
255 | * Return 0 on success, else -1 | |
256 | */ | |
257 | static int try_connect_sessiond(const char *sock_path) | |
258 | { | |
259 | int ret; | |
260 | ||
261 | /* If socket exist, we check if the daemon listens for connect. */ | |
262 | ret = access(sock_path, F_OK); | |
263 | if (ret < 0) { | |
264 | /* Not alive */ | |
2f70b271 | 265 | goto error; |
2269e89e DG |
266 | } |
267 | ||
268 | ret = lttcomm_connect_unix_sock(sock_path); | |
269 | if (ret < 0) { | |
270 | /* Not alive */ | |
2f70b271 | 271 | goto error; |
2269e89e DG |
272 | } |
273 | ||
274 | ret = lttcomm_close_unix_sock(ret); | |
275 | if (ret < 0) { | |
276 | perror("lttcomm_close_unix_sock"); | |
277 | } | |
278 | ||
279 | return 0; | |
2f70b271 DG |
280 | |
281 | error: | |
282 | return -1; | |
2269e89e DG |
283 | } |
284 | ||
285 | /* | |
2f70b271 DG |
286 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
287 | * variable. | |
288 | * | |
289 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
290 | * is somehow too long or ENOMEM). | |
947308c4 DG |
291 | */ |
292 | static int set_session_daemon_path(void) | |
293 | { | |
2269e89e DG |
294 | int in_tgroup = 0; /* In tracing group */ |
295 | uid_t uid; | |
296 | ||
297 | uid = getuid(); | |
947308c4 | 298 | |
2269e89e DG |
299 | if (uid != 0) { |
300 | /* Are we in the tracing group ? */ | |
6c71277b | 301 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
302 | } |
303 | ||
08a9c49f | 304 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
305 | lttng_ctl_copy_string(sessiond_sock_path, |
306 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 307 | } |
2269e89e | 308 | |
08a9c49f | 309 | if (uid != 0) { |
c617c0c6 MD |
310 | int ret; |
311 | ||
08a9c49f TD |
312 | if (in_tgroup) { |
313 | /* Tracing group */ | |
314 | ret = try_connect_sessiond(sessiond_sock_path); | |
315 | if (ret >= 0) { | |
316 | goto end; | |
2269e89e | 317 | } |
08a9c49f | 318 | /* Global session daemon not available... */ |
2269e89e | 319 | } |
08a9c49f TD |
320 | /* ...or not in tracing group (and not root), default */ |
321 | ||
322 | /* | |
323 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
324 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
325 | */ | |
326 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 327 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 328 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 329 | goto error; |
947308c4 | 330 | } |
947308c4 | 331 | } |
08a9c49f | 332 | end: |
947308c4 | 333 | return 0; |
2f70b271 DG |
334 | |
335 | error: | |
336 | return -1; | |
947308c4 DG |
337 | } |
338 | ||
65beb5ff DG |
339 | /* |
340 | * Connect to the LTTng session daemon. | |
341 | * | |
342 | * On success, return 0. On error, return -1. | |
343 | */ | |
344 | static int connect_sessiond(void) | |
345 | { | |
346 | int ret; | |
347 | ||
da3c9ec1 DG |
348 | /* Don't try to connect if already connected. */ |
349 | if (connected) { | |
350 | return 0; | |
351 | } | |
352 | ||
65beb5ff DG |
353 | ret = set_session_daemon_path(); |
354 | if (ret < 0) { | |
2f70b271 | 355 | goto error; |
65beb5ff DG |
356 | } |
357 | ||
358 | /* Connect to the sesssion daemon */ | |
359 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); | |
360 | if (ret < 0) { | |
2f70b271 | 361 | goto error; |
65beb5ff DG |
362 | } |
363 | ||
364 | sessiond_socket = ret; | |
365 | connected = 1; | |
366 | ||
367 | return 0; | |
2f70b271 DG |
368 | |
369 | error: | |
370 | return -1; | |
65beb5ff DG |
371 | } |
372 | ||
373 | /* | |
1c8d13c8 TD |
374 | * Clean disconnect from the session daemon. |
375 | * On success, return 0. On error, return -1. | |
65beb5ff DG |
376 | */ |
377 | static int disconnect_sessiond(void) | |
378 | { | |
379 | int ret = 0; | |
380 | ||
381 | if (connected) { | |
382 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
383 | sessiond_socket = 0; | |
384 | connected = 0; | |
385 | } | |
386 | ||
387 | return ret; | |
388 | } | |
389 | ||
35a6fdb7 | 390 | /* |
cd80958d | 391 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 392 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 393 | * |
af87c45a | 394 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 395 | */ |
cac3069d DG |
396 | LTTNG_HIDDEN |
397 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
a4b92340 | 398 | void *vardata, size_t varlen, void **buf) |
65beb5ff DG |
399 | { |
400 | int ret; | |
401 | size_t size; | |
402 | void *data = NULL; | |
cd80958d | 403 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
404 | |
405 | ret = connect_sessiond(); | |
406 | if (ret < 0) { | |
2f70b271 | 407 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
408 | goto end; |
409 | } | |
410 | ||
65beb5ff | 411 | /* Send command to session daemon */ |
cd80958d | 412 | ret = send_session_msg(lsm); |
65beb5ff | 413 | if (ret < 0) { |
2f70b271 | 414 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
415 | goto end; |
416 | } | |
53a80697 MD |
417 | /* Send var len data */ |
418 | ret = send_session_varlen(vardata, varlen); | |
419 | if (ret < 0) { | |
2f70b271 | 420 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
421 | goto end; |
422 | } | |
65beb5ff DG |
423 | |
424 | /* Get header from data transmission */ | |
425 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
426 | if (ret < 0) { | |
2f70b271 | 427 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
428 | goto end; |
429 | } | |
430 | ||
431 | /* Check error code if OK */ | |
f73fabfd | 432 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
433 | ret = -llm.ret_code; |
434 | goto end; | |
435 | } | |
436 | ||
437 | size = llm.data_size; | |
438 | if (size == 0) { | |
874d3f84 | 439 | /* If client free with size 0 */ |
a45d5536 DG |
440 | if (buf != NULL) { |
441 | *buf = NULL; | |
442 | } | |
7d29a247 | 443 | ret = 0; |
65beb5ff DG |
444 | goto end; |
445 | } | |
446 | ||
6b25c800 MD |
447 | data = zmalloc(size); |
448 | if (!data) { | |
449 | ret = -ENOMEM; | |
450 | goto end; | |
451 | } | |
65beb5ff DG |
452 | |
453 | /* Get payload data */ | |
454 | ret = recv_data_sessiond(data, size); | |
455 | if (ret < 0) { | |
456 | free(data); | |
457 | goto end; | |
458 | } | |
459 | ||
83009e5e DG |
460 | /* |
461 | * Extra protection not to dereference a NULL pointer. If buf is NULL at | |
462 | * this point, an error is returned and data is freed. | |
463 | */ | |
464 | if (buf == NULL) { | |
2f70b271 | 465 | ret = -LTTNG_ERR_INVALID; |
83009e5e DG |
466 | free(data); |
467 | goto end; | |
468 | } | |
469 | ||
65beb5ff DG |
470 | *buf = data; |
471 | ret = size; | |
472 | ||
473 | end: | |
474 | disconnect_sessiond(); | |
475 | return ret; | |
476 | } | |
477 | ||
9f19cc17 | 478 | /* |
cd80958d | 479 | * Create lttng handle and return pointer. |
1c8d13c8 | 480 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 481 | */ |
cd80958d DG |
482 | struct lttng_handle *lttng_create_handle(const char *session_name, |
483 | struct lttng_domain *domain) | |
9f19cc17 | 484 | { |
2f70b271 DG |
485 | struct lttng_handle *handle = NULL; |
486 | ||
487 | if (domain == NULL) { | |
488 | goto end; | |
489 | } | |
cd80958d | 490 | |
6b25c800 | 491 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 492 | if (handle == NULL) { |
2f70b271 | 493 | PERROR("malloc handle"); |
cd80958d DG |
494 | goto end; |
495 | } | |
496 | ||
497 | /* Copy session name */ | |
cac3069d | 498 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
499 | sizeof(handle->session_name)); |
500 | ||
501 | /* Copy lttng domain */ | |
cac3069d | 502 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); |
cd80958d DG |
503 | |
504 | end: | |
505 | return handle; | |
506 | } | |
507 | ||
508 | /* | |
509 | * Destroy handle by free(3) the pointer. | |
510 | */ | |
511 | void lttng_destroy_handle(struct lttng_handle *handle) | |
512 | { | |
0e428499 | 513 | free(handle); |
eb354453 DG |
514 | } |
515 | ||
d9800920 DG |
516 | /* |
517 | * Register an outside consumer. | |
1c8d13c8 | 518 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
519 | */ |
520 | int lttng_register_consumer(struct lttng_handle *handle, | |
521 | const char *socket_path) | |
522 | { | |
523 | struct lttcomm_session_msg lsm; | |
524 | ||
2f70b271 DG |
525 | if (handle == NULL || socket_path == NULL) { |
526 | return -LTTNG_ERR_INVALID; | |
527 | } | |
528 | ||
53efb85a | 529 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 530 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 531 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 532 | sizeof(lsm.session.name)); |
cac3069d | 533 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 534 | |
cac3069d | 535 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
d9800920 | 536 | |
cac3069d | 537 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
538 | } |
539 | ||
1df4dedd | 540 | /* |
1c8d13c8 TD |
541 | * Start tracing for all traces of the session. |
542 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 543 | */ |
6a4f824d | 544 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 545 | { |
cd80958d DG |
546 | struct lttcomm_session_msg lsm; |
547 | ||
6a4f824d | 548 | if (session_name == NULL) { |
2f70b271 | 549 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
550 | } |
551 | ||
53efb85a | 552 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 553 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 554 | |
cac3069d DG |
555 | lttng_ctl_copy_string(lsm.session.name, session_name, |
556 | sizeof(lsm.session.name)); | |
cd80958d | 557 | |
cac3069d | 558 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 559 | } |
1df4dedd DG |
560 | |
561 | /* | |
38ee087f | 562 | * Stop tracing for all traces of the session. |
f3ed775e | 563 | */ |
38ee087f | 564 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 565 | { |
38ee087f | 566 | int ret, data_ret; |
cd80958d DG |
567 | struct lttcomm_session_msg lsm; |
568 | ||
6a4f824d | 569 | if (session_name == NULL) { |
2f70b271 | 570 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
571 | } |
572 | ||
53efb85a | 573 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 574 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 575 | |
cac3069d DG |
576 | lttng_ctl_copy_string(lsm.session.name, session_name, |
577 | sizeof(lsm.session.name)); | |
cd80958d | 578 | |
cac3069d | 579 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
580 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
581 | goto error; | |
582 | } | |
583 | ||
584 | if (!wait) { | |
585 | goto end; | |
586 | } | |
587 | ||
38ee087f DG |
588 | /* Check for data availability */ |
589 | do { | |
6d805429 | 590 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
591 | if (data_ret < 0) { |
592 | /* Return the data available call error. */ | |
593 | ret = data_ret; | |
594 | goto error; | |
595 | } | |
596 | ||
597 | /* | |
598 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
599 | * returned value indicates availability. | |
600 | */ | |
6d805429 | 601 | if (data_ret) { |
38ee087f | 602 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 603 | } |
6d805429 | 604 | } while (data_ret != 0); |
38ee087f | 605 | |
38ee087f DG |
606 | end: |
607 | error: | |
608 | return ret; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Stop tracing and wait for data availability. | |
613 | */ | |
614 | int lttng_stop_tracing(const char *session_name) | |
615 | { | |
616 | return _lttng_stop_tracing(session_name, 1); | |
617 | } | |
618 | ||
619 | /* | |
620 | * Stop tracing but _don't_ wait for data availability. | |
621 | */ | |
622 | int lttng_stop_tracing_no_wait(const char *session_name) | |
623 | { | |
624 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
625 | } |
626 | ||
627 | /* | |
601d5acf DG |
628 | * Add context to a channel. |
629 | * | |
630 | * If the given channel is NULL, add the contexts to all channels. | |
631 | * The event_name param is ignored. | |
af87c45a DG |
632 | * |
633 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 634 | */ |
cd80958d | 635 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
636 | struct lttng_event_context *ctx, const char *event_name, |
637 | const char *channel_name) | |
d65106b1 | 638 | { |
cd80958d DG |
639 | struct lttcomm_session_msg lsm; |
640 | ||
9d697d3d DG |
641 | /* Safety check. Both are mandatory */ |
642 | if (handle == NULL || ctx == NULL) { | |
2f70b271 | 643 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
644 | } |
645 | ||
441c16a7 MD |
646 | memset(&lsm, 0, sizeof(lsm)); |
647 | ||
cd80958d DG |
648 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
649 | ||
85076754 MD |
650 | /* If no channel name, send empty string. */ |
651 | if (channel_name == NULL) { | |
652 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
653 | sizeof(lsm.u.context.channel_name)); | |
654 | } else { | |
655 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
656 | sizeof(lsm.u.context.channel_name)); | |
657 | } | |
cd80958d | 658 | |
cac3069d | 659 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d65106b1 | 660 | |
9d697d3d | 661 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); |
d65106b1 | 662 | |
cac3069d | 663 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
664 | sizeof(lsm.session.name)); |
665 | ||
cac3069d | 666 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d65106b1 DG |
667 | } |
668 | ||
f3ed775e | 669 | /* |
1c8d13c8 TD |
670 | * Enable event(s) for a channel. |
671 | * If no event name is specified, all events are enabled. | |
672 | * If no channel name is specified, the default 'channel0' is used. | |
673 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 674 | */ |
cd80958d | 675 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 676 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 677 | { |
f8a96544 JI |
678 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
679 | NULL, 0, NULL); | |
1df4dedd DG |
680 | } |
681 | ||
53a80697 | 682 | /* |
025faf73 | 683 | * Create or enable an event with a filter expression. |
178191b3 | 684 | * |
53a80697 MD |
685 | * Return negative error value on error. |
686 | * Return size of returned session payload data if OK. | |
687 | */ | |
025faf73 | 688 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 689 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
690 | const char *filter_expression) |
691 | { | |
f8a96544 JI |
692 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
693 | filter_expression, 0, NULL); | |
53a80697 MD |
694 | } |
695 | ||
347c5ab5 DG |
696 | /* |
697 | * Depending on the event, return a newly allocated JUL filter expression or | |
698 | * NULL if not applicable. | |
699 | * | |
700 | * An event with NO loglevel and the name is * will return NULL. | |
701 | */ | |
702 | static char *set_jul_filter(const char *filter, struct lttng_event *ev) | |
703 | { | |
704 | int err; | |
705 | char *jul_filter = NULL; | |
706 | ||
707 | assert(ev); | |
708 | ||
709 | /* Don't add filter for the '*' event. */ | |
710 | if (ev->name[0] != '*') { | |
711 | if (filter) { | |
fb0edb23 | 712 | err = asprintf(&jul_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
713 | ev->name); |
714 | } else { | |
715 | err = asprintf(&jul_filter, "logger_name == \"%s\"", ev->name); | |
716 | } | |
717 | if (err < 0) { | |
718 | PERROR("asprintf"); | |
6a556f7b | 719 | goto error; |
347c5ab5 DG |
720 | } |
721 | } | |
722 | ||
723 | /* Add loglevel filtering if any for the JUL domain. */ | |
724 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
725 | char *op; | |
726 | ||
727 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
728 | op = ">="; | |
729 | } else { | |
730 | op = "=="; | |
731 | } | |
732 | ||
6a556f7b JG |
733 | if (filter || jul_filter) { |
734 | char *new_filter; | |
735 | ||
fb0edb23 | 736 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
6a556f7b | 737 | jul_filter ? jul_filter : filter, op, |
347c5ab5 | 738 | ev->loglevel); |
6a556f7b JG |
739 | if (jul_filter) { |
740 | free(jul_filter); | |
741 | } | |
742 | jul_filter = new_filter; | |
347c5ab5 DG |
743 | } else { |
744 | err = asprintf(&jul_filter, "int_loglevel %s %d", op, | |
745 | ev->loglevel); | |
746 | } | |
747 | if (err < 0) { | |
748 | PERROR("asprintf"); | |
6a556f7b | 749 | goto error; |
347c5ab5 DG |
750 | } |
751 | } | |
752 | ||
347c5ab5 | 753 | return jul_filter; |
6a556f7b JG |
754 | error: |
755 | free(jul_filter); | |
756 | return NULL; | |
347c5ab5 DG |
757 | } |
758 | ||
137b9942 DG |
759 | /* |
760 | * Generate the filter bytecode from a give filter expression string. Put the | |
761 | * newly allocated parser context in ctxp and populate the lsm object with the | |
762 | * expression len. | |
763 | * | |
764 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
765 | */ | |
766 | static int generate_filter(char *filter_expression, | |
767 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
768 | { | |
769 | int ret; | |
770 | struct filter_parser_ctx *ctx = NULL; | |
771 | FILE *fmem = NULL; | |
772 | ||
773 | assert(filter_expression); | |
774 | assert(lsm); | |
775 | assert(ctxp); | |
776 | ||
777 | /* | |
778 | * Casting const to non-const, as the underlying function will use it in | |
779 | * read-only mode. | |
780 | */ | |
781 | fmem = lttng_fmemopen((void *) filter_expression, | |
782 | strlen(filter_expression), "r"); | |
783 | if (!fmem) { | |
784 | fprintf(stderr, "Error opening memory as stream\n"); | |
785 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
786 | goto error; | |
787 | } | |
788 | ctx = filter_parser_ctx_alloc(fmem); | |
789 | if (!ctx) { | |
790 | fprintf(stderr, "Error allocating parser\n"); | |
791 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
792 | goto filter_alloc_error; | |
793 | } | |
794 | ret = filter_parser_ctx_append_ast(ctx); | |
795 | if (ret) { | |
796 | fprintf(stderr, "Parse error\n"); | |
797 | ret = -LTTNG_ERR_FILTER_INVAL; | |
798 | goto parse_error; | |
799 | } | |
800 | ret = filter_visitor_set_parent(ctx); | |
801 | if (ret) { | |
802 | fprintf(stderr, "Set parent error\n"); | |
803 | ret = -LTTNG_ERR_FILTER_INVAL; | |
804 | goto parse_error; | |
805 | } | |
806 | if (print_xml) { | |
807 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
808 | if (ret) { | |
809 | fflush(stdout); | |
810 | fprintf(stderr, "XML print error\n"); | |
811 | ret = -LTTNG_ERR_FILTER_INVAL; | |
812 | goto parse_error; | |
813 | } | |
814 | } | |
815 | ||
816 | dbg_printf("Generating IR... "); | |
817 | fflush(stdout); | |
818 | ret = filter_visitor_ir_generate(ctx); | |
819 | if (ret) { | |
820 | fprintf(stderr, "Generate IR error\n"); | |
821 | ret = -LTTNG_ERR_FILTER_INVAL; | |
822 | goto parse_error; | |
823 | } | |
824 | dbg_printf("done\n"); | |
825 | ||
826 | dbg_printf("Validating IR... "); | |
827 | fflush(stdout); | |
828 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
829 | if (ret) { | |
830 | ret = -LTTNG_ERR_FILTER_INVAL; | |
831 | goto parse_error; | |
832 | } | |
dcd5daf2 JG |
833 | /* Validate strings used as literals in the expression */ |
834 | ret = filter_visitor_ir_validate_string(ctx); | |
835 | if (ret) { | |
836 | ret = -LTTNG_ERR_FILTER_INVAL; | |
837 | goto parse_error; | |
838 | } | |
137b9942 DG |
839 | dbg_printf("done\n"); |
840 | ||
841 | dbg_printf("Generating bytecode... "); | |
842 | fflush(stdout); | |
843 | ret = filter_visitor_bytecode_generate(ctx); | |
844 | if (ret) { | |
845 | fprintf(stderr, "Generate bytecode error\n"); | |
846 | ret = -LTTNG_ERR_FILTER_INVAL; | |
847 | goto parse_error; | |
848 | } | |
849 | dbg_printf("done\n"); | |
850 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
851 | bytecode_get_len(&ctx->bytecode->b)); | |
852 | ||
853 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
854 | + bytecode_get_len(&ctx->bytecode->b); | |
855 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
856 | ||
857 | /* No need to keep the memory stream. */ | |
858 | if (fclose(fmem) != 0) { | |
859 | perror("fclose"); | |
860 | } | |
861 | ||
862 | *ctxp = ctx; | |
863 | return 0; | |
864 | ||
865 | parse_error: | |
137b9942 DG |
866 | filter_ir_free(ctx); |
867 | filter_parser_ctx_free(ctx); | |
868 | filter_alloc_error: | |
869 | if (fclose(fmem) != 0) { | |
870 | perror("fclose"); | |
871 | } | |
872 | error: | |
873 | return ret; | |
874 | } | |
875 | ||
93deb080 JI |
876 | /* |
877 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
878 | * If no event name is specified, all events are enabled. | |
879 | * If no channel name is specified, the default name is used. | |
880 | * If filter expression is not NULL, the filter is set for the event. | |
881 | * If exclusion count is not zero, the exclusions are set for the event. | |
882 | * Returns size of returned session payload data or a negative error code. | |
883 | */ | |
884 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
885 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 886 | const char *original_filter_expression, |
93deb080 JI |
887 | int exclusion_count, char **exclusion_list) |
888 | { | |
889 | struct lttcomm_session_msg lsm; | |
64226865 | 890 | char *varlen_data; |
93deb080 | 891 | int ret = 0; |
137b9942 | 892 | unsigned int free_filter_expression = 0; |
93deb080 | 893 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
894 | /* |
895 | * Cast as non-const since we may replace the filter expression | |
896 | * by a dynamically allocated string. Otherwise, the original | |
897 | * string is not modified. | |
898 | */ | |
899 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
900 | |
901 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
902 | ret = -LTTNG_ERR_INVALID; |
903 | goto error; | |
93deb080 JI |
904 | } |
905 | ||
906 | /* Empty filter string will always be rejected by the parser | |
907 | * anyway, so treat this corner-case early to eliminate | |
908 | * lttng_fmemopen error for 0-byte allocation. | |
909 | */ | |
910 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
911 | ret = -LTTNG_ERR_INVALID; |
912 | goto error; | |
93deb080 JI |
913 | } |
914 | ||
915 | memset(&lsm, 0, sizeof(lsm)); | |
916 | ||
917 | /* If no channel name, send empty string. */ | |
918 | if (channel_name == NULL) { | |
919 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
920 | sizeof(lsm.u.enable.channel_name)); | |
921 | } else { | |
922 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
923 | sizeof(lsm.u.enable.channel_name)); | |
924 | } | |
925 | ||
18a720cd MD |
926 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
927 | if (ev->name[0] == '\0') { | |
928 | /* Enable all events */ | |
929 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 930 | } |
93deb080 | 931 | |
6565421f | 932 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 933 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
934 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
935 | ||
936 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
937 | sizeof(lsm.session.name)); | |
938 | lsm.u.enable.exclusion_count = exclusion_count; | |
939 | lsm.u.enable.bytecode_len = 0; | |
940 | ||
9b21e6d5 DG |
941 | /* |
942 | * For the JUL domain, a filter is enforced except for the enable all | |
943 | * event. This is done to avoid having the event in all sessions thus | |
944 | * filtering by logger name. | |
945 | */ | |
946 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 DG |
947 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
948 | handle->domain.type != LTTNG_DOMAIN_LOG4J)) { | |
3e1c9ff7 | 949 | goto ask_sessiond; |
93deb080 JI |
950 | } |
951 | ||
952 | /* | |
953 | * We have either a filter or some exclusions, so we need to set up | |
954 | * a variable-length memory block from where to send the data | |
955 | */ | |
956 | ||
957 | /* Parse filter expression */ | |
5cdb6027 DG |
958 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
959 | || handle->domain.type == LTTNG_DOMAIN_LOG4J) { | |
960 | if (handle->domain.type == LTTNG_DOMAIN_JUL || | |
961 | handle->domain.type == LTTNG_DOMAIN_LOG4J) { | |
64226865 DG |
962 | char *jul_filter; |
963 | ||
347c5ab5 | 964 | /* Setup JUL filter if needed. */ |
64226865 | 965 | jul_filter = set_jul_filter(filter_expression, ev); |
137b9942 DG |
966 | if (!jul_filter) { |
967 | if (!filter_expression) { | |
968 | /* No JUL and no filter, just skip everything below. */ | |
969 | goto ask_sessiond; | |
970 | } | |
64226865 DG |
971 | } else { |
972 | /* | |
973 | * With a JUL filter, the original filter has been added to it | |
974 | * thus replace the filter expression. | |
975 | */ | |
e9efbcd3 JG |
976 | filter_expression = jul_filter; |
977 | free_filter_expression = 1; | |
9b21e6d5 | 978 | } |
9b21e6d5 | 979 | } |
93deb080 | 980 | |
137b9942 | 981 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 982 | if (ret) { |
137b9942 | 983 | goto filter_error; |
93deb080 | 984 | } |
6b453b5e JG |
985 | } |
986 | ||
987 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
988 | + lsm.u.enable.expression_len |
989 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
990 | if (!varlen_data) { |
991 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 992 | goto mem_error; |
6b453b5e | 993 | } |
137b9942 | 994 | |
6b453b5e JG |
995 | /* Put exclusion names first in the data */ |
996 | while (exclusion_count--) { | |
997 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
137b9942 | 998 | *(exclusion_list + exclusion_count), LTTNG_SYMBOL_NAME_LEN); |
6b453b5e JG |
999 | } |
1000 | /* Add filter expression next */ | |
1001 | if (lsm.u.enable.expression_len != 0) { | |
1002 | memcpy(varlen_data | |
1003 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1004 | filter_expression, | |
1005 | lsm.u.enable.expression_len); | |
1006 | } | |
1007 | /* Add filter bytecode next */ | |
137b9942 | 1008 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1009 | memcpy(varlen_data |
1010 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1011 | + lsm.u.enable.expression_len, | |
1012 | &ctx->bytecode->b, | |
1013 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1014 | } |
1015 | ||
1016 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data, | |
67676bd8 | 1017 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
137b9942 | 1018 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, NULL); |
6b453b5e | 1019 | free(varlen_data); |
93deb080 | 1020 | |
7ca1dc6f DG |
1021 | mem_error: |
1022 | if (filter_expression && ctx) { | |
93deb080 JI |
1023 | filter_bytecode_free(ctx); |
1024 | filter_ir_free(ctx); | |
1025 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1026 | } |
1027 | filter_error: | |
1028 | if (free_filter_expression) { | |
1029 | /* | |
1030 | * The filter expression has been replaced and must be freed as it is | |
1031 | * not the original filter expression received as a parameter. | |
1032 | */ | |
1033 | free(filter_expression); | |
93deb080 | 1034 | } |
137b9942 DG |
1035 | error: |
1036 | /* | |
1037 | * Return directly to the caller and don't ask the sessiond since something | |
1038 | * went wrong in the parsing of data above. | |
1039 | */ | |
93deb080 | 1040 | return ret; |
3e1c9ff7 DG |
1041 | |
1042 | ask_sessiond: | |
1043 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1044 | return ret; | |
93deb080 JI |
1045 | } |
1046 | ||
6e911cad MD |
1047 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1048 | struct lttng_event *ev, const char *channel_name, | |
1049 | const char *original_filter_expression) | |
1df4dedd | 1050 | { |
cd80958d | 1051 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1052 | char *varlen_data; |
1053 | int ret = 0; | |
1054 | unsigned int free_filter_expression = 0; | |
1055 | struct filter_parser_ctx *ctx = NULL; | |
1056 | /* | |
1057 | * Cast as non-const since we may replace the filter expression | |
1058 | * by a dynamically allocated string. Otherwise, the original | |
1059 | * string is not modified. | |
1060 | */ | |
1061 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1062 | |
6e911cad MD |
1063 | if (handle == NULL || ev == NULL) { |
1064 | ret = -LTTNG_ERR_INVALID; | |
1065 | goto error; | |
1066 | } | |
1067 | ||
1068 | /* Empty filter string will always be rejected by the parser | |
1069 | * anyway, so treat this corner-case early to eliminate | |
1070 | * lttng_fmemopen error for 0-byte allocation. | |
1071 | */ | |
1072 | if (filter_expression && filter_expression[0] == '\0') { | |
1073 | ret = -LTTNG_ERR_INVALID; | |
1074 | goto error; | |
cd80958d DG |
1075 | } |
1076 | ||
441c16a7 MD |
1077 | memset(&lsm, 0, sizeof(lsm)); |
1078 | ||
85076754 MD |
1079 | /* If no channel name, send empty string. */ |
1080 | if (channel_name == NULL) { | |
1081 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1082 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1083 | } else { |
85076754 | 1084 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1085 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1086 | } |
1087 | ||
18a720cd MD |
1088 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
1089 | if (ev->name[0] == '\0') { | |
1090 | /* Disable all events */ | |
1091 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
f3ed775e DG |
1092 | } |
1093 | ||
6e911cad MD |
1094 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1095 | /* FIXME: copying non-packed struct to packed struct. */ | |
1096 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1097 | ||
cac3069d | 1098 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1099 | sizeof(lsm.session.name)); |
6e911cad | 1100 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1101 | |
6e911cad MD |
1102 | /* |
1103 | * For the JUL domain, a filter is enforced except for the | |
1104 | * disable all event. This is done to avoid having the event in | |
1105 | * all sessions thus filtering by logger name. | |
1106 | */ | |
1107 | if (filter_expression == NULL && | |
1108 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
1109 | handle->domain.type != LTTNG_DOMAIN_LOG4J)) { | |
1110 | goto ask_sessiond; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * We have a filter, so we need to set up a variable-length | |
1115 | * memory block from where to send the data. | |
1116 | */ | |
1117 | ||
1118 | /* Parse filter expression */ | |
1119 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
1120 | || handle->domain.type == LTTNG_DOMAIN_LOG4J) { | |
1121 | if (handle->domain.type == LTTNG_DOMAIN_JUL || | |
1122 | handle->domain.type == LTTNG_DOMAIN_LOG4J) { | |
1123 | char *jul_filter; | |
1124 | ||
1125 | /* Setup JUL filter if needed. */ | |
1126 | jul_filter = set_jul_filter(filter_expression, ev); | |
1127 | if (!jul_filter) { | |
1128 | if (!filter_expression) { | |
1129 | /* No JUL and no filter, just skip everything below. */ | |
1130 | goto ask_sessiond; | |
1131 | } | |
1132 | } else { | |
1133 | /* | |
1134 | * With a JUL filter, the original filter has been added to it | |
1135 | * thus replace the filter expression. | |
1136 | */ | |
1137 | filter_expression = jul_filter; | |
1138 | free_filter_expression = 1; | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1143 | if (ret) { | |
1144 | goto filter_error; | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1149 | + lsm.u.disable.expression_len); | |
1150 | if (!varlen_data) { | |
1151 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1152 | goto mem_error; | |
1153 | } | |
1154 | ||
1155 | /* Add filter expression */ | |
1156 | if (lsm.u.disable.expression_len != 0) { | |
1157 | memcpy(varlen_data, | |
1158 | filter_expression, | |
1159 | lsm.u.disable.expression_len); | |
1160 | } | |
1161 | /* Add filter bytecode next */ | |
1162 | if (ctx && lsm.u.disable.bytecode_len != 0) { | |
1163 | memcpy(varlen_data | |
1164 | + lsm.u.disable.expression_len, | |
1165 | &ctx->bytecode->b, | |
1166 | lsm.u.disable.bytecode_len); | |
1167 | } | |
1168 | ||
1169 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data, | |
1170 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); | |
1171 | free(varlen_data); | |
1172 | ||
1173 | mem_error: | |
1174 | if (filter_expression && ctx) { | |
1175 | filter_bytecode_free(ctx); | |
1176 | filter_ir_free(ctx); | |
1177 | filter_parser_ctx_free(ctx); | |
1178 | } | |
1179 | filter_error: | |
1180 | if (free_filter_expression) { | |
1181 | /* | |
1182 | * The filter expression has been replaced and must be freed as it is | |
1183 | * not the original filter expression received as a parameter. | |
1184 | */ | |
1185 | free(filter_expression); | |
1186 | } | |
1187 | error: | |
1188 | /* | |
1189 | * Return directly to the caller and don't ask the sessiond since something | |
1190 | * went wrong in the parsing of data above. | |
1191 | */ | |
1192 | return ret; | |
1193 | ||
1194 | ask_sessiond: | |
1195 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1196 | return ret; | |
1197 | } | |
1198 | ||
1199 | /* | |
1200 | * Disable event(s) of a channel and domain. | |
1201 | * If no event name is specified, all events are disabled. | |
1202 | * If no channel name is specified, the default 'channel0' is used. | |
1203 | * Returns size of returned session payload data or a negative error code. | |
1204 | */ | |
1205 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1206 | const char *channel_name) | |
1207 | { | |
1208 | struct lttng_event ev; | |
1209 | ||
1210 | memset(&ev, 0, sizeof(ev)); | |
4b9ac515 | 1211 | ev.loglevel = -1; |
6e911cad MD |
1212 | ev.type = LTTNG_EVENT_ALL; |
1213 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1214 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1215 | } |
1216 | ||
1217 | /* | |
1c8d13c8 TD |
1218 | * Enable channel per domain |
1219 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1220 | */ |
cd80958d | 1221 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 1222 | struct lttng_channel *chan) |
a5c5a2bd | 1223 | { |
cd80958d DG |
1224 | struct lttcomm_session_msg lsm; |
1225 | ||
5117eeec DG |
1226 | /* |
1227 | * NULL arguments are forbidden. No default values. | |
1228 | */ | |
1229 | if (handle == NULL || chan == NULL) { | |
2f70b271 | 1230 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1231 | } |
1232 | ||
441c16a7 MD |
1233 | memset(&lsm, 0, sizeof(lsm)); |
1234 | ||
5117eeec | 1235 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 1236 | |
cd80958d DG |
1237 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
1238 | ||
cac3069d | 1239 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1240 | |
cac3069d | 1241 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1242 | sizeof(lsm.session.name)); |
1243 | ||
cac3069d | 1244 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1245 | } |
1df4dedd | 1246 | |
2ef84c95 | 1247 | /* |
1c8d13c8 TD |
1248 | * All tracing will be stopped for registered events of the channel. |
1249 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1250 | */ |
cd80958d | 1251 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1252 | { |
cd80958d DG |
1253 | struct lttcomm_session_msg lsm; |
1254 | ||
9d697d3d DG |
1255 | /* Safety check. Both are mandatory */ |
1256 | if (handle == NULL || name == NULL) { | |
2f70b271 | 1257 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1258 | } |
1259 | ||
441c16a7 MD |
1260 | memset(&lsm, 0, sizeof(lsm)); |
1261 | ||
cd80958d | 1262 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1263 | |
cac3069d | 1264 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1265 | sizeof(lsm.u.disable.channel_name)); |
1266 | ||
cac3069d | 1267 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1268 | |
cac3069d | 1269 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1270 | sizeof(lsm.session.name)); |
1271 | ||
cac3069d | 1272 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1273 | } |
1274 | ||
fac6795d | 1275 | /* |
1c8d13c8 TD |
1276 | * Lists all available tracepoints of domain. |
1277 | * Sets the contents of the events array. | |
1278 | * Returns the number of lttng_event entries in events; | |
1279 | * on error, returns a negative value. | |
fac6795d | 1280 | */ |
cd80958d | 1281 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1282 | struct lttng_event **events) |
fac6795d | 1283 | { |
052da939 | 1284 | int ret; |
cd80958d DG |
1285 | struct lttcomm_session_msg lsm; |
1286 | ||
9d697d3d | 1287 | if (handle == NULL) { |
2f70b271 | 1288 | return -LTTNG_ERR_INVALID; |
cd80958d | 1289 | } |
fac6795d | 1290 | |
53efb85a | 1291 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1292 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1293 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1294 | |
cac3069d | 1295 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1296 | if (ret < 0) { |
1297 | return ret; | |
eb354453 | 1298 | } |
fac6795d | 1299 | |
9f19cc17 | 1300 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1301 | } |
1302 | ||
f37d259d MD |
1303 | /* |
1304 | * Lists all available tracepoint fields of domain. | |
1305 | * Sets the contents of the event field array. | |
1306 | * Returns the number of lttng_event_field entries in events; | |
1307 | * on error, returns a negative value. | |
1308 | */ | |
1309 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1310 | struct lttng_event_field **fields) | |
1311 | { | |
1312 | int ret; | |
1313 | struct lttcomm_session_msg lsm; | |
1314 | ||
1315 | if (handle == NULL) { | |
2f70b271 | 1316 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1317 | } |
1318 | ||
53efb85a | 1319 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1320 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1321 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1322 | |
cac3069d | 1323 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1324 | if (ret < 0) { |
1325 | return ret; | |
1326 | } | |
1327 | ||
1328 | return ret / sizeof(struct lttng_event_field); | |
1329 | } | |
1330 | ||
834978fd DG |
1331 | /* |
1332 | * Lists all available kernel system calls. Allocates and sets the contents of | |
1333 | * the events array. | |
1334 | * | |
1335 | * Returns the number of lttng_event entries in events; on error, returns a | |
1336 | * negative value. | |
1337 | */ | |
1338 | int lttng_list_syscalls(struct lttng_event **events) | |
1339 | { | |
1340 | int ret; | |
1341 | struct lttcomm_session_msg lsm; | |
1342 | ||
1343 | if (!events) { | |
1344 | return -LTTNG_ERR_INVALID; | |
1345 | } | |
1346 | ||
1347 | memset(&lsm, 0, sizeof(lsm)); | |
1348 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1349 | /* Force kernel domain for system calls. */ | |
1350 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1351 | ||
1352 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1353 | if (ret < 0) { | |
1354 | return ret; | |
1355 | } | |
1356 | ||
1357 | return ret / sizeof(struct lttng_event); | |
1358 | } | |
1359 | ||
1657e9bb | 1360 | /* |
1c8d13c8 TD |
1361 | * Returns a human readable string describing |
1362 | * the error code (a negative value). | |
1657e9bb | 1363 | */ |
9a745bc7 | 1364 | const char *lttng_strerror(int code) |
1657e9bb | 1365 | { |
f73fabfd | 1366 | return error_get_str(code); |
1657e9bb DG |
1367 | } |
1368 | ||
aaf97519 | 1369 | /* |
a4b92340 DG |
1370 | * Create a brand new session using name and url for destination. |
1371 | * | |
f73fabfd | 1372 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1373 | */ |
a4b92340 | 1374 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1375 | { |
3dd05a85 | 1376 | int ret; |
a4b92340 | 1377 | ssize_t size; |
00e2e675 | 1378 | struct lttcomm_session_msg lsm; |
a4b92340 | 1379 | struct lttng_uri *uris = NULL; |
00e2e675 | 1380 | |
a4b92340 | 1381 | if (name == NULL) { |
2f70b271 | 1382 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1383 | } |
1384 | ||
a4b92340 | 1385 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1386 | |
a4b92340 | 1387 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1388 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1389 | |
1390 | /* There should never be a data URL */ | |
bc894455 | 1391 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1392 | if (size < 0) { |
2f70b271 | 1393 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1394 | } |
1395 | ||
a4b92340 DG |
1396 | lsm.u.uri.size = size; |
1397 | ||
cac3069d DG |
1398 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1399 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1400 | |
1401 | free(uris); | |
1402 | return ret; | |
00e2e675 DG |
1403 | } |
1404 | ||
8028d920 | 1405 | /* |
8028d920 | 1406 | * Destroy session using name. |
1c8d13c8 | 1407 | * Returns size of returned session payload data or a negative error code. |
8028d920 | 1408 | */ |
843f5df9 | 1409 | int lttng_destroy_session(const char *session_name) |
8028d920 | 1410 | { |
cd80958d DG |
1411 | struct lttcomm_session_msg lsm; |
1412 | ||
843f5df9 | 1413 | if (session_name == NULL) { |
2f70b271 | 1414 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1415 | } |
1416 | ||
53efb85a | 1417 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1418 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1419 | |
cac3069d DG |
1420 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1421 | sizeof(lsm.session.name)); | |
cd80958d | 1422 | |
cac3069d | 1423 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1424 | } |
1425 | ||
57167058 | 1426 | /* |
57167058 | 1427 | * Ask the session daemon for all available sessions. |
1c8d13c8 TD |
1428 | * Sets the contents of the sessions array. |
1429 | * Returns the number of lttng_session entries in sessions; | |
1430 | * on error, returns a negative value. | |
57167058 | 1431 | */ |
ca95a216 | 1432 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1433 | { |
ca95a216 | 1434 | int ret; |
cd80958d | 1435 | struct lttcomm_session_msg lsm; |
57167058 | 1436 | |
53efb85a | 1437 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1438 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1439 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1440 | if (ret < 0) { |
ca95a216 | 1441 | return ret; |
57167058 DG |
1442 | } |
1443 | ||
ca95a216 | 1444 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1445 | } |
1446 | ||
9f19cc17 | 1447 | /* |
1c8d13c8 TD |
1448 | * Ask the session daemon for all available domains of a session. |
1449 | * Sets the contents of the domains array. | |
1450 | * Returns the number of lttng_domain entries in domains; | |
1451 | * on error, returns a negative value. | |
9f19cc17 | 1452 | */ |
330be774 | 1453 | int lttng_list_domains(const char *session_name, |
cd80958d | 1454 | struct lttng_domain **domains) |
9f19cc17 DG |
1455 | { |
1456 | int ret; | |
cd80958d DG |
1457 | struct lttcomm_session_msg lsm; |
1458 | ||
330be774 | 1459 | if (session_name == NULL) { |
2f70b271 | 1460 | return -LTTNG_ERR_INVALID; |
cd80958d | 1461 | } |
9f19cc17 | 1462 | |
53efb85a | 1463 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1464 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1465 | ||
cac3069d DG |
1466 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1467 | sizeof(lsm.session.name)); | |
cd80958d | 1468 | |
cac3069d | 1469 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1470 | if (ret < 0) { |
1471 | return ret; | |
1472 | } | |
1473 | ||
1474 | return ret / sizeof(struct lttng_domain); | |
1475 | } | |
1476 | ||
1477 | /* | |
1c8d13c8 TD |
1478 | * Ask the session daemon for all available channels of a session. |
1479 | * Sets the contents of the channels array. | |
1480 | * Returns the number of lttng_channel entries in channels; | |
1481 | * on error, returns a negative value. | |
9f19cc17 | 1482 | */ |
cd80958d DG |
1483 | int lttng_list_channels(struct lttng_handle *handle, |
1484 | struct lttng_channel **channels) | |
9f19cc17 DG |
1485 | { |
1486 | int ret; | |
cd80958d DG |
1487 | struct lttcomm_session_msg lsm; |
1488 | ||
9d697d3d | 1489 | if (handle == NULL) { |
2f70b271 | 1490 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1491 | } |
1492 | ||
53efb85a | 1493 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1494 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1495 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1496 | sizeof(lsm.session.name)); |
9f19cc17 | 1497 | |
cac3069d | 1498 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1499 | |
cac3069d | 1500 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1501 | if (ret < 0) { |
1502 | return ret; | |
1503 | } | |
1504 | ||
1505 | return ret / sizeof(struct lttng_channel); | |
1506 | } | |
1507 | ||
1508 | /* | |
1c8d13c8 TD |
1509 | * Ask the session daemon for all available events of a session channel. |
1510 | * Sets the contents of the events array. | |
1511 | * Returns the number of lttng_event entries in events; | |
1512 | * on error, returns a negative value. | |
9f19cc17 | 1513 | */ |
cd80958d DG |
1514 | int lttng_list_events(struct lttng_handle *handle, |
1515 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1516 | { |
1517 | int ret; | |
cd80958d | 1518 | struct lttcomm_session_msg lsm; |
9f19cc17 | 1519 | |
9d697d3d DG |
1520 | /* Safety check. An handle and channel name are mandatory */ |
1521 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1522 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1523 | } |
1524 | ||
53efb85a | 1525 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1526 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1527 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1528 | sizeof(lsm.session.name)); |
cac3069d | 1529 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d DG |
1530 | sizeof(lsm.u.list.channel_name)); |
1531 | ||
cac3069d | 1532 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1533 | |
cac3069d | 1534 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) events); |
9f19cc17 DG |
1535 | if (ret < 0) { |
1536 | return ret; | |
1537 | } | |
1538 | ||
1539 | return ret / sizeof(struct lttng_event); | |
1540 | } | |
1541 | ||
fac6795d | 1542 | /* |
1c8d13c8 TD |
1543 | * Sets the tracing_group variable with name. |
1544 | * This function allocates memory pointed to by tracing_group. | |
1545 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1546 | */ |
1547 | int lttng_set_tracing_group(const char *name) | |
1548 | { | |
9d697d3d | 1549 | if (name == NULL) { |
2f70b271 | 1550 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1551 | } |
1552 | ||
fac6795d | 1553 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1554 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1555 | } |
1556 | ||
1557 | return 0; | |
1558 | } | |
1559 | ||
d0254c7c | 1560 | /* |
af87c45a | 1561 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1562 | */ |
cd80958d | 1563 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1564 | struct lttng_calibrate *calibrate) |
1565 | { | |
cd80958d | 1566 | struct lttcomm_session_msg lsm; |
d0254c7c | 1567 | |
9d697d3d DG |
1568 | /* Safety check. NULL pointer are forbidden */ |
1569 | if (handle == NULL || calibrate == NULL) { | |
2f70b271 | 1570 | return -LTTNG_ERR_INVALID; |
cd80958d | 1571 | } |
d0254c7c | 1572 | |
53efb85a | 1573 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1574 | lsm.cmd_type = LTTNG_CALIBRATE; |
cac3069d | 1575 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d0254c7c | 1576 | |
cd80958d DG |
1577 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1578 | ||
cac3069d | 1579 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d0254c7c MD |
1580 | } |
1581 | ||
5edd7e09 DG |
1582 | /* |
1583 | * Set default channel attributes. | |
441c16a7 | 1584 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1585 | */ |
1586 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1587 | struct lttng_channel_attr *attr) | |
1588 | { | |
1589 | /* Safety check */ | |
1590 | if (attr == NULL || domain == NULL) { | |
1591 | return; | |
1592 | } | |
1593 | ||
eacaa7a6 DS |
1594 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1595 | ||
0a9c6494 DG |
1596 | /* Same for all domains. */ |
1597 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1598 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1599 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1600 | ||
5edd7e09 DG |
1601 | switch (domain->type) { |
1602 | case LTTNG_DOMAIN_KERNEL: | |
d92ff3ef DG |
1603 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
1604 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
3e230f92 | 1605 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1606 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1607 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1608 | break; | |
1609 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1610 | switch (domain->buf_type) { |
1611 | case LTTNG_BUFFER_PER_UID: | |
1612 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1613 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1614 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
1615 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1616 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
1617 | break; | |
1618 | case LTTNG_BUFFER_PER_PID: | |
1619 | default: | |
1620 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1621 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1622 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
1623 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1624 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
1625 | break; | |
1626 | } | |
5edd7e09 | 1627 | default: |
441c16a7 | 1628 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1629 | break; |
1630 | } | |
1631 | } | |
1632 | ||
fac6795d | 1633 | /* |
2269e89e | 1634 | * Check if session daemon is alive. |
fac6795d | 1635 | * |
2269e89e | 1636 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1637 | * On error returns a negative value. |
fac6795d | 1638 | */ |
947308c4 | 1639 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1640 | { |
1641 | int ret; | |
1642 | ||
1643 | ret = set_session_daemon_path(); | |
1644 | if (ret < 0) { | |
947308c4 | 1645 | /* Error */ |
fac6795d DG |
1646 | return ret; |
1647 | } | |
1648 | ||
9d035200 | 1649 | if (*sessiond_sock_path == '\0') { |
2f70b271 DG |
1650 | /* |
1651 | * No socket path set. Weird error which means the constructor was not | |
1652 | * called. | |
1653 | */ | |
1654 | assert(0); | |
fac6795d DG |
1655 | } |
1656 | ||
2269e89e | 1657 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 MD |
1658 | if (ret < 0) { |
1659 | /* Not alive */ | |
1660 | return 0; | |
1661 | } | |
7d8234d9 | 1662 | |
947308c4 DG |
1663 | /* Is alive */ |
1664 | return 1; | |
fac6795d DG |
1665 | } |
1666 | ||
00e2e675 | 1667 | /* |
a4b92340 | 1668 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
1669 | * |
1670 | * Return 0 on success, else a negative value. | |
1671 | */ | |
a4b92340 DG |
1672 | int lttng_set_consumer_url(struct lttng_handle *handle, |
1673 | const char *control_url, const char *data_url) | |
00e2e675 | 1674 | { |
3dd05a85 | 1675 | int ret; |
a4b92340 | 1676 | ssize_t size; |
00e2e675 | 1677 | struct lttcomm_session_msg lsm; |
a4b92340 | 1678 | struct lttng_uri *uris = NULL; |
00e2e675 | 1679 | |
a4b92340 | 1680 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 1681 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1682 | } |
1683 | ||
a4b92340 DG |
1684 | memset(&lsm, 0, sizeof(lsm)); |
1685 | ||
00e2e675 DG |
1686 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
1687 | ||
cac3069d | 1688 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 1689 | sizeof(lsm.session.name)); |
cac3069d | 1690 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 1691 | |
bc894455 | 1692 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 1693 | if (size < 0) { |
2f70b271 | 1694 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
1695 | } |
1696 | ||
1697 | lsm.u.uri.size = size; | |
00e2e675 | 1698 | |
cac3069d DG |
1699 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1700 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1701 | |
1702 | free(uris); | |
1703 | return ret; | |
00e2e675 DG |
1704 | } |
1705 | ||
1706 | /* | |
9c6bda17 | 1707 | * [OBSOLETE] |
00e2e675 DG |
1708 | */ |
1709 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1710 | { | |
785d2d0d | 1711 | return -ENOSYS; |
00e2e675 DG |
1712 | } |
1713 | ||
1714 | /* | |
9c6bda17 | 1715 | * [OBSOLETE] |
00e2e675 DG |
1716 | */ |
1717 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1718 | { | |
785d2d0d | 1719 | return -ENOSYS; |
00e2e675 DG |
1720 | } |
1721 | ||
07424f16 DG |
1722 | /* |
1723 | * This is an extension of create session that is ONLY and SHOULD only be used | |
1724 | * by the lttng command line program. It exists to avoid using URI parsing in | |
1725 | * the lttng client. | |
1726 | * | |
1727 | * We need the date and time for the trace path subdirectory for the case where | |
1728 | * the user does NOT define one using either -o or -U. Using the normal | |
1729 | * lttng_create_session API call, we have no clue on the session daemon side if | |
1730 | * the URL was generated automatically by the client or define by the user. | |
1731 | * | |
1732 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
1733 | * string and appends it if necessary to the URI subdirectory before sending it | |
1734 | * to the session daemon. | |
1735 | * | |
1736 | * With this extra function, the lttng_create_session call behavior is not | |
1737 | * changed and the timestamp is appended to the URI on the session daemon side | |
1738 | * if necessary. | |
1739 | */ | |
1740 | int _lttng_create_session_ext(const char *name, const char *url, | |
1741 | const char *datetime) | |
1742 | { | |
3dd05a85 | 1743 | int ret; |
07424f16 DG |
1744 | ssize_t size; |
1745 | struct lttcomm_session_msg lsm; | |
1746 | struct lttng_uri *uris = NULL; | |
1747 | ||
2bba9e53 | 1748 | if (name == NULL || datetime == NULL) { |
2f70b271 | 1749 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
1750 | } |
1751 | ||
1752 | memset(&lsm, 0, sizeof(lsm)); | |
1753 | ||
1754 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 1755 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 DG |
1756 | |
1757 | /* There should never be a data URL */ | |
bc894455 | 1758 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 1759 | if (size < 0) { |
3dd05a85 DG |
1760 | ret = -LTTNG_ERR_INVALID; |
1761 | goto error; | |
07424f16 DG |
1762 | } |
1763 | ||
1764 | lsm.u.uri.size = size; | |
1765 | ||
4b35a6b3 | 1766 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
1767 | /* Don't append datetime if the name was automatically created. */ |
1768 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
1769 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
1770 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
1771 | name, datetime); | |
1772 | } else { | |
1773 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
1774 | } | |
07424f16 DG |
1775 | if (ret < 0) { |
1776 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
1777 | ret = -LTTNG_ERR_FATAL; |
1778 | goto error; | |
07424f16 DG |
1779 | } |
1780 | } | |
1781 | ||
cac3069d DG |
1782 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1783 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1784 | |
1785 | error: | |
1786 | free(uris); | |
1787 | return ret; | |
07424f16 DG |
1788 | } |
1789 | ||
806e2684 DG |
1790 | /* |
1791 | * For a given session name, this call checks if the data is ready to be read | |
1792 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
1793 | * any readers. | |
1794 | */ | |
6d805429 | 1795 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
1796 | { |
1797 | int ret; | |
1798 | struct lttcomm_session_msg lsm; | |
1799 | ||
1800 | if (session_name == NULL) { | |
1801 | return -LTTNG_ERR_INVALID; | |
1802 | } | |
1803 | ||
53efb85a | 1804 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 1805 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 1806 | |
cac3069d DG |
1807 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1808 | sizeof(lsm.session.name)); | |
806e2684 | 1809 | |
cac3069d | 1810 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
806e2684 DG |
1811 | |
1812 | /* | |
cac3069d DG |
1813 | * The lttng_ctl_ask_sessiond function negate the return code if it's not |
1814 | * LTTNG_OK so getting -1 means that the reply ret_code was 1 thus meaning | |
1815 | * that the data is available. Yes it is hackish but for now this is the | |
1816 | * only way. | |
806e2684 DG |
1817 | */ |
1818 | if (ret == -1) { | |
1819 | ret = 1; | |
1820 | } | |
1821 | ||
1822 | return ret; | |
1823 | } | |
1824 | ||
27babd3a DG |
1825 | /* |
1826 | * Create a session exclusively used for snapshot. | |
1827 | * | |
1828 | * Returns LTTNG_OK on success or a negative error code. | |
1829 | */ | |
1830 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1831 | { | |
1832 | int ret; | |
1833 | ssize_t size; | |
1834 | struct lttcomm_session_msg lsm; | |
1835 | struct lttng_uri *uris = NULL; | |
1836 | ||
1837 | if (name == NULL) { | |
1838 | return -LTTNG_ERR_INVALID; | |
1839 | } | |
1840 | ||
1841 | memset(&lsm, 0, sizeof(lsm)); | |
1842 | ||
1843 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
1844 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1845 | ||
1846 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1847 | if (size < 0) { | |
1848 | return -LTTNG_ERR_INVALID; | |
1849 | } | |
1850 | ||
1851 | lsm.u.uri.size = size; | |
1852 | ||
1853 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1854 | sizeof(struct lttng_uri) * size, NULL); | |
1855 | ||
1856 | free(uris); | |
1857 | return ret; | |
1858 | } | |
1859 | ||
ecc48a90 JD |
1860 | /* |
1861 | * Create a session exclusively used for live. | |
1862 | * | |
1863 | * Returns LTTNG_OK on success or a negative error code. | |
1864 | */ | |
1865 | int lttng_create_session_live(const char *name, const char *url, | |
1866 | unsigned int timer_interval) | |
1867 | { | |
1868 | int ret; | |
1869 | ssize_t size; | |
1870 | struct lttcomm_session_msg lsm; | |
1871 | struct lttng_uri *uris = NULL; | |
1872 | ||
1873 | if (name == NULL) { | |
1874 | return -LTTNG_ERR_INVALID; | |
1875 | } | |
1876 | ||
1877 | memset(&lsm, 0, sizeof(lsm)); | |
1878 | ||
1879 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
1880 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1881 | ||
1a241656 DG |
1882 | if (url) { |
1883 | size = uri_parse_str_urls(url, NULL, &uris); | |
1884 | if (size <= 0) { | |
1885 | ret = -LTTNG_ERR_INVALID; | |
1886 | goto end; | |
1887 | } | |
ecc48a90 | 1888 | |
1a241656 DG |
1889 | /* file:// is not accepted for live session. */ |
1890 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
1891 | ret = -LTTNG_ERR_INVALID; | |
1892 | goto end; | |
1893 | } | |
1894 | } else { | |
1895 | size = 0; | |
ecc48a90 JD |
1896 | } |
1897 | ||
1898 | lsm.u.session_live.nb_uri = size; | |
1899 | lsm.u.session_live.timer_interval = timer_interval; | |
1900 | ||
1901 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1902 | sizeof(struct lttng_uri) * size, NULL); | |
1903 | ||
1904 | end: | |
1905 | free(uris); | |
1906 | return ret; | |
1907 | } | |
1908 | ||
fac6795d DG |
1909 | /* |
1910 | * lib constructor | |
1911 | */ | |
1912 | static void __attribute__((constructor)) init() | |
1913 | { | |
1914 | /* Set default session group */ | |
bbccc3d2 | 1915 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 1916 | } |
49cca668 DG |
1917 | |
1918 | /* | |
1919 | * lib destructor | |
1920 | */ | |
1921 | static void __attribute__((destructor)) lttng_ctl_exit() | |
1922 | { | |
1923 | free(tracing_group); | |
1924 | } |