Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
2001793c | 7 | * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
d14d33bf AM |
9 | * This library is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
11 | * as published by the Free Software Foundation. | |
82a3637f DG |
12 | * |
13 | * This library is distributed in the hope that it will be useful, | |
fac6795d | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
82a3637f DG |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. | |
17 | * | |
d14d33bf AM |
18 | * You should have received a copy of the GNU Lesser General Public License |
19 | * along with this library; if not, write to the Free Software Foundation, | |
20 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
fac6795d DG |
21 | */ |
22 | ||
6c1c0768 | 23 | #define _LGPL_SOURCE |
44a5e5eb | 24 | #include <assert.h> |
fac6795d | 25 | #include <grp.h> |
1e307fab | 26 | #include <errno.h> |
fac6795d DG |
27 | #include <stdio.h> |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #include <unistd.h> | |
31 | ||
990570ed DG |
32 | #include <common/common.h> |
33 | #include <common/defaults.h> | |
db758600 | 34 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 35 | #include <common/uri.h> |
feb0f3e5 | 36 | #include <common/utils.h> |
1e307fab | 37 | #include <lttng/lttng.h> |
0c89d795 | 38 | #include <lttng/health-internal.h> |
a58c490f JG |
39 | #include <lttng/trigger/trigger-internal.h> |
40 | #include <lttng/endpoint.h> | |
41 | #include <lttng/channel-internal.h> | |
fac6795d | 42 | |
d00c599e DG |
43 | #include "filter/filter-ast.h" |
44 | #include "filter/filter-parser.h" | |
45 | #include "filter/filter-bytecode.h" | |
46 | #include "filter/memstream.h" | |
cac3069d | 47 | #include "lttng-ctl-helper.h" |
53a80697 MD |
48 | |
49 | #ifdef DEBUG | |
d00c599e | 50 | static const int print_xml = 1; |
53a80697 MD |
51 | #define dbg_printf(fmt, args...) \ |
52 | printf("[debug liblttng-ctl] " fmt, ## args) | |
53 | #else | |
d00c599e | 54 | static const int print_xml = 0; |
53a80697 MD |
55 | #define dbg_printf(fmt, args...) \ |
56 | do { \ | |
57 | /* do nothing but check printf format */ \ | |
58 | if (0) \ | |
59 | printf("[debug liblttnctl] " fmt, ## args); \ | |
60 | } while (0) | |
61 | #endif | |
62 | ||
63 | ||
fac6795d DG |
64 | /* Socket to session daemon for communication */ |
65 | static int sessiond_socket; | |
66 | static char sessiond_sock_path[PATH_MAX]; | |
67 | ||
fac6795d DG |
68 | /* Variables */ |
69 | static char *tracing_group; | |
70 | static int connected; | |
71 | ||
97e19046 DG |
72 | /* Global */ |
73 | ||
74 | /* | |
75 | * Those two variables are used by error.h to silent or control the verbosity of | |
76 | * error message. They are global to the library so application linking with it | |
77 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
78 | */ |
79 | int lttng_opt_quiet; | |
80 | int lttng_opt_verbose; | |
c7e35b03 | 81 | int lttng_opt_mi; |
97e19046 | 82 | |
99497cd0 MD |
83 | /* |
84 | * Copy string from src to dst and enforce null terminated byte. | |
85 | */ | |
cac3069d DG |
86 | LTTNG_HIDDEN |
87 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 88 | { |
e7d6716d | 89 | if (src && dst) { |
99497cd0 MD |
90 | strncpy(dst, src, len); |
91 | /* Enforce the NULL terminated byte */ | |
92 | dst[len - 1] = '\0'; | |
cd80958d DG |
93 | } else if (dst) { |
94 | dst[0] = '\0'; | |
99497cd0 MD |
95 | } |
96 | } | |
97 | ||
fac6795d | 98 | /* |
cd80958d | 99 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 100 | * |
cd80958d DG |
101 | * If domain is unknown, default domain will be the kernel. |
102 | */ | |
cac3069d DG |
103 | LTTNG_HIDDEN |
104 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
105 | struct lttng_domain *src) | |
cd80958d DG |
106 | { |
107 | if (src && dst) { | |
108 | switch (src->type) { | |
00e2e675 DG |
109 | case LTTNG_DOMAIN_KERNEL: |
110 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 111 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 112 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 113 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
114 | memcpy(dst, src, sizeof(struct lttng_domain)); |
115 | break; | |
116 | default: | |
117 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 118 | break; |
cd80958d DG |
119 | } |
120 | } | |
121 | } | |
122 | ||
123 | /* | |
124 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 125 | * |
1c8d13c8 TD |
126 | * On success, returns the number of bytes sent (>=0) |
127 | * On error, returns -1 | |
fac6795d | 128 | */ |
cd80958d | 129 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
130 | { |
131 | int ret; | |
132 | ||
133 | if (!connected) { | |
2f70b271 | 134 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 135 | goto end; |
fac6795d DG |
136 | } |
137 | ||
a4b92340 DG |
138 | DBG("LSM cmd type : %d", lsm->cmd_type); |
139 | ||
be040666 | 140 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 141 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
142 | if (ret < 0) { |
143 | ret = -LTTNG_ERR_FATAL; | |
144 | } | |
e065084a DG |
145 | |
146 | end: | |
147 | return ret; | |
148 | } | |
149 | ||
53a80697 MD |
150 | /* |
151 | * Send var len data to the session daemon. | |
152 | * | |
153 | * On success, returns the number of bytes sent (>=0) | |
154 | * On error, returns -1 | |
155 | */ | |
c2d69327 | 156 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
157 | { |
158 | int ret; | |
159 | ||
160 | if (!connected) { | |
2f70b271 | 161 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
162 | goto end; |
163 | } | |
a4b92340 | 164 | |
53a80697 MD |
165 | if (!data || !len) { |
166 | ret = 0; | |
167 | goto end; | |
168 | } | |
169 | ||
170 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
171 | if (ret < 0) { |
172 | ret = -LTTNG_ERR_FATAL; | |
173 | } | |
53a80697 MD |
174 | |
175 | end: | |
176 | return ret; | |
177 | } | |
178 | ||
a04d53fc FD |
179 | /* |
180 | * Send file descriptors to the session daemon. | |
181 | * | |
182 | * On success, returns the number of bytes sent (>=0) | |
183 | * On error, returns -1 | |
184 | */ | |
185 | static int send_session_fds(const int *fds, size_t nb_fd) | |
186 | { | |
187 | int ret; | |
188 | ||
189 | if (!connected) { | |
190 | ret = -LTTNG_ERR_NO_SESSIOND; | |
191 | goto end; | |
192 | } | |
193 | ||
194 | if (!fds || !nb_fd) { | |
195 | ret = 0; | |
196 | goto end; | |
197 | } | |
198 | ||
199 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
200 | if (ret < 0) { | |
201 | ret = -LTTNG_ERR_FATAL; | |
202 | } | |
203 | ||
204 | end: | |
205 | return ret; | |
206 | } | |
207 | ||
e065084a | 208 | /* |
cd80958d | 209 | * Receive data from the sessiond socket. |
e065084a | 210 | * |
1c8d13c8 TD |
211 | * On success, returns the number of bytes received (>=0) |
212 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 213 | */ |
ca95a216 | 214 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
215 | { |
216 | int ret; | |
217 | ||
218 | if (!connected) { | |
2f70b271 | 219 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 220 | goto end; |
fac6795d DG |
221 | } |
222 | ||
ca95a216 | 223 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
224 | if (ret < 0) { |
225 | ret = -LTTNG_ERR_FATAL; | |
226 | } | |
fac6795d | 227 | |
e065084a | 228 | end: |
fac6795d DG |
229 | return ret; |
230 | } | |
231 | ||
232 | /* | |
9ae110e2 | 233 | * Check if we are in the specified group. |
65beb5ff | 234 | * |
9ae110e2 | 235 | * If yes return 1, else return -1. |
947308c4 | 236 | */ |
6c71277b MD |
237 | LTTNG_HIDDEN |
238 | int lttng_check_tracing_group(void) | |
947308c4 DG |
239 | { |
240 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
241 | gid_t *grp_list; | |
242 | int grp_list_size, grp_id, i; | |
243 | int ret = -1; | |
6c71277b | 244 | const char *grp_name = tracing_group; |
947308c4 DG |
245 | |
246 | /* Get GID of group 'tracing' */ | |
247 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
248 | if (!grp_tracing) { |
249 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
250 | goto end; |
251 | } | |
252 | ||
253 | /* Get number of supplementary group IDs */ | |
254 | grp_list_size = getgroups(0, NULL); | |
255 | if (grp_list_size < 0) { | |
6f04ed72 | 256 | PERROR("getgroups"); |
947308c4 DG |
257 | goto end; |
258 | } | |
259 | ||
260 | /* Alloc group list of the right size */ | |
3f451dc0 | 261 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 262 | if (!grp_list) { |
6f04ed72 | 263 | PERROR("malloc"); |
00795392 MD |
264 | goto end; |
265 | } | |
947308c4 | 266 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 267 | if (grp_id < 0) { |
6f04ed72 | 268 | PERROR("getgroups"); |
947308c4 DG |
269 | goto free_list; |
270 | } | |
271 | ||
272 | for (i = 0; i < grp_list_size; i++) { | |
273 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 274 | ret = 1; |
947308c4 DG |
275 | break; |
276 | } | |
277 | } | |
278 | ||
279 | free_list: | |
280 | free(grp_list); | |
281 | ||
282 | end: | |
283 | return ret; | |
284 | } | |
285 | ||
286 | /* | |
2269e89e DG |
287 | * Try connect to session daemon with sock_path. |
288 | * | |
289 | * Return 0 on success, else -1 | |
290 | */ | |
291 | static int try_connect_sessiond(const char *sock_path) | |
292 | { | |
293 | int ret; | |
294 | ||
295 | /* If socket exist, we check if the daemon listens for connect. */ | |
296 | ret = access(sock_path, F_OK); | |
297 | if (ret < 0) { | |
298 | /* Not alive */ | |
2f70b271 | 299 | goto error; |
2269e89e DG |
300 | } |
301 | ||
302 | ret = lttcomm_connect_unix_sock(sock_path); | |
303 | if (ret < 0) { | |
9ae110e2 | 304 | /* Not alive. */ |
2f70b271 | 305 | goto error; |
2269e89e DG |
306 | } |
307 | ||
308 | ret = lttcomm_close_unix_sock(ret); | |
309 | if (ret < 0) { | |
6f04ed72 | 310 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
311 | } |
312 | ||
313 | return 0; | |
2f70b271 DG |
314 | |
315 | error: | |
316 | return -1; | |
2269e89e DG |
317 | } |
318 | ||
319 | /* | |
2f70b271 DG |
320 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
321 | * variable. | |
322 | * | |
323 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
324 | * is somehow too long or ENOMEM). | |
947308c4 DG |
325 | */ |
326 | static int set_session_daemon_path(void) | |
327 | { | |
9ae110e2 | 328 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
329 | uid_t uid; |
330 | ||
331 | uid = getuid(); | |
947308c4 | 332 | |
2269e89e DG |
333 | if (uid != 0) { |
334 | /* Are we in the tracing group ? */ | |
6c71277b | 335 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
336 | } |
337 | ||
08a9c49f | 338 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
339 | lttng_ctl_copy_string(sessiond_sock_path, |
340 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 341 | } |
2269e89e | 342 | |
08a9c49f | 343 | if (uid != 0) { |
c617c0c6 MD |
344 | int ret; |
345 | ||
08a9c49f | 346 | if (in_tgroup) { |
9ae110e2 | 347 | /* Tracing group. */ |
08a9c49f TD |
348 | ret = try_connect_sessiond(sessiond_sock_path); |
349 | if (ret >= 0) { | |
350 | goto end; | |
2269e89e | 351 | } |
08a9c49f | 352 | /* Global session daemon not available... */ |
2269e89e | 353 | } |
08a9c49f TD |
354 | /* ...or not in tracing group (and not root), default */ |
355 | ||
356 | /* | |
9ae110e2 JG |
357 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
358 | * is too small; | |
359 | * With GNU C >= 2.1, snprintf returns the required size | |
360 | * (excluding closing null) | |
08a9c49f TD |
361 | */ |
362 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 363 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 364 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 365 | goto error; |
947308c4 | 366 | } |
947308c4 | 367 | } |
08a9c49f | 368 | end: |
947308c4 | 369 | return 0; |
2f70b271 DG |
370 | |
371 | error: | |
372 | return -1; | |
947308c4 DG |
373 | } |
374 | ||
65beb5ff | 375 | /* |
9ae110e2 | 376 | * Connect to the LTTng session daemon. |
65beb5ff | 377 | * |
9ae110e2 | 378 | * On success, return 0. On error, return -1. |
65beb5ff DG |
379 | */ |
380 | static int connect_sessiond(void) | |
381 | { | |
382 | int ret; | |
383 | ||
da3c9ec1 DG |
384 | /* Don't try to connect if already connected. */ |
385 | if (connected) { | |
386 | return 0; | |
387 | } | |
388 | ||
65beb5ff DG |
389 | ret = set_session_daemon_path(); |
390 | if (ret < 0) { | |
2f70b271 | 391 | goto error; |
65beb5ff DG |
392 | } |
393 | ||
9ae110e2 | 394 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
395 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
396 | if (ret < 0) { | |
2f70b271 | 397 | goto error; |
65beb5ff DG |
398 | } |
399 | ||
400 | sessiond_socket = ret; | |
401 | connected = 1; | |
402 | ||
403 | return 0; | |
2f70b271 DG |
404 | |
405 | error: | |
406 | return -1; | |
65beb5ff DG |
407 | } |
408 | ||
409 | /* | |
1c8d13c8 | 410 | * Clean disconnect from the session daemon. |
9ae110e2 | 411 | * |
1c8d13c8 | 412 | * On success, return 0. On error, return -1. |
65beb5ff DG |
413 | */ |
414 | static int disconnect_sessiond(void) | |
415 | { | |
416 | int ret = 0; | |
417 | ||
418 | if (connected) { | |
419 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
420 | sessiond_socket = 0; | |
421 | connected = 0; | |
422 | } | |
423 | ||
424 | return ret; | |
425 | } | |
426 | ||
795a978d PP |
427 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
428 | size_t *user_len) | |
429 | { | |
430 | int ret = 0; | |
431 | void *buf = NULL; | |
432 | ||
433 | if (len) { | |
434 | if (!user_len) { | |
435 | ret = -LTTNG_ERR_INVALID; | |
436 | goto end; | |
437 | } | |
438 | ||
439 | buf = zmalloc(len); | |
440 | if (!buf) { | |
441 | ret = -ENOMEM; | |
442 | goto end; | |
443 | } | |
444 | ||
445 | ret = recv_data_sessiond(buf, len); | |
446 | if (ret < 0) { | |
447 | goto end; | |
448 | } | |
449 | ||
450 | if (!user_buf) { | |
451 | ret = -LTTNG_ERR_INVALID; | |
452 | goto end; | |
453 | } | |
454 | ||
455 | /* Move ownership of command header buffer to user. */ | |
456 | *user_buf = buf; | |
457 | buf = NULL; | |
458 | *user_len = len; | |
459 | } else { | |
460 | /* No command header. */ | |
461 | if (user_len) { | |
462 | *user_len = 0; | |
463 | } | |
464 | ||
465 | if (user_buf) { | |
466 | *user_buf = NULL; | |
467 | } | |
468 | } | |
469 | ||
470 | end: | |
471 | free(buf); | |
472 | return ret; | |
473 | } | |
474 | ||
35a6fdb7 | 475 | /* |
cd80958d | 476 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
477 | * Takes extra var. len. data and file descriptors as input to send to the |
478 | * session daemon. | |
65beb5ff | 479 | * |
af87c45a | 480 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 481 | */ |
cac3069d | 482 | LTTNG_HIDDEN |
a04d53fc FD |
483 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
484 | const int *fds, size_t nb_fd, const void *vardata, | |
485 | size_t vardata_len, void **user_payload_buf, | |
486 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
487 | { |
488 | int ret; | |
795a978d | 489 | size_t payload_len; |
cd80958d | 490 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
491 | |
492 | ret = connect_sessiond(); | |
493 | if (ret < 0) { | |
2f70b271 | 494 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
495 | goto end; |
496 | } | |
497 | ||
65beb5ff | 498 | /* Send command to session daemon */ |
cd80958d | 499 | ret = send_session_msg(lsm); |
65beb5ff | 500 | if (ret < 0) { |
2f70b271 | 501 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
502 | goto end; |
503 | } | |
53a80697 | 504 | /* Send var len data */ |
795a978d | 505 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 506 | if (ret < 0) { |
2f70b271 | 507 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
508 | goto end; |
509 | } | |
65beb5ff | 510 | |
a04d53fc FD |
511 | /* Send fds */ |
512 | ret = send_session_fds(fds, nb_fd); | |
513 | if (ret < 0) { | |
514 | /* Ret value is a valid lttng error code. */ | |
515 | goto end; | |
516 | } | |
517 | ||
65beb5ff DG |
518 | /* Get header from data transmission */ |
519 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
520 | if (ret < 0) { | |
2f70b271 | 521 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
522 | goto end; |
523 | } | |
524 | ||
525 | /* Check error code if OK */ | |
f73fabfd | 526 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
527 | ret = -llm.ret_code; |
528 | goto end; | |
529 | } | |
530 | ||
795a978d PP |
531 | /* Get command header from data transmission */ |
532 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
533 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 534 | if (ret < 0) { |
65beb5ff DG |
535 | goto end; |
536 | } | |
537 | ||
795a978d PP |
538 | /* Get payload from data transmission */ |
539 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
540 | &payload_len); | |
541 | if (ret < 0) { | |
83009e5e DG |
542 | goto end; |
543 | } | |
544 | ||
795a978d | 545 | ret = llm.data_size; |
65beb5ff DG |
546 | |
547 | end: | |
548 | disconnect_sessiond(); | |
549 | return ret; | |
550 | } | |
551 | ||
9f19cc17 | 552 | /* |
cd80958d | 553 | * Create lttng handle and return pointer. |
9ae110e2 | 554 | * |
1c8d13c8 | 555 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 556 | */ |
cd80958d DG |
557 | struct lttng_handle *lttng_create_handle(const char *session_name, |
558 | struct lttng_domain *domain) | |
9f19cc17 | 559 | { |
2f70b271 DG |
560 | struct lttng_handle *handle = NULL; |
561 | ||
3f451dc0 | 562 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 563 | if (handle == NULL) { |
2f70b271 | 564 | PERROR("malloc handle"); |
cd80958d DG |
565 | goto end; |
566 | } | |
567 | ||
568 | /* Copy session name */ | |
cac3069d | 569 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
570 | sizeof(handle->session_name)); |
571 | ||
95681498 JG |
572 | /* Copy lttng domain or leave initialized to 0. */ |
573 | if (domain) { | |
574 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
575 | } | |
cd80958d DG |
576 | |
577 | end: | |
578 | return handle; | |
579 | } | |
580 | ||
581 | /* | |
582 | * Destroy handle by free(3) the pointer. | |
583 | */ | |
584 | void lttng_destroy_handle(struct lttng_handle *handle) | |
585 | { | |
0e428499 | 586 | free(handle); |
eb354453 DG |
587 | } |
588 | ||
d9800920 DG |
589 | /* |
590 | * Register an outside consumer. | |
9ae110e2 | 591 | * |
1c8d13c8 | 592 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
593 | */ |
594 | int lttng_register_consumer(struct lttng_handle *handle, | |
595 | const char *socket_path) | |
596 | { | |
597 | struct lttcomm_session_msg lsm; | |
598 | ||
2f70b271 DG |
599 | if (handle == NULL || socket_path == NULL) { |
600 | return -LTTNG_ERR_INVALID; | |
601 | } | |
602 | ||
53efb85a | 603 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 604 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 605 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 606 | sizeof(lsm.session.name)); |
cac3069d | 607 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 608 | |
9ae110e2 JG |
609 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
610 | sizeof(lsm.u.reg.path)); | |
d9800920 | 611 | |
cac3069d | 612 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
613 | } |
614 | ||
1df4dedd | 615 | /* |
9ae110e2 JG |
616 | * Start tracing for all traces of the session. |
617 | * | |
618 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 619 | */ |
6a4f824d | 620 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 621 | { |
cd80958d DG |
622 | struct lttcomm_session_msg lsm; |
623 | ||
6a4f824d | 624 | if (session_name == NULL) { |
2f70b271 | 625 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
626 | } |
627 | ||
53efb85a | 628 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 629 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 630 | |
cac3069d DG |
631 | lttng_ctl_copy_string(lsm.session.name, session_name, |
632 | sizeof(lsm.session.name)); | |
cd80958d | 633 | |
cac3069d | 634 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 635 | } |
1df4dedd DG |
636 | |
637 | /* | |
38ee087f | 638 | * Stop tracing for all traces of the session. |
f3ed775e | 639 | */ |
38ee087f | 640 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 641 | { |
38ee087f | 642 | int ret, data_ret; |
cd80958d DG |
643 | struct lttcomm_session_msg lsm; |
644 | ||
6a4f824d | 645 | if (session_name == NULL) { |
2f70b271 | 646 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
647 | } |
648 | ||
53efb85a | 649 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 650 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 651 | |
cac3069d DG |
652 | lttng_ctl_copy_string(lsm.session.name, session_name, |
653 | sizeof(lsm.session.name)); | |
cd80958d | 654 | |
cac3069d | 655 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
656 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
657 | goto error; | |
658 | } | |
659 | ||
660 | if (!wait) { | |
661 | goto end; | |
662 | } | |
663 | ||
38ee087f DG |
664 | /* Check for data availability */ |
665 | do { | |
6d805429 | 666 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
667 | if (data_ret < 0) { |
668 | /* Return the data available call error. */ | |
669 | ret = data_ret; | |
670 | goto error; | |
671 | } | |
672 | ||
673 | /* | |
9ae110e2 JG |
674 | * Data sleep time before retrying (in usec). Don't sleep if the |
675 | * call returned value indicates availability. | |
38ee087f | 676 | */ |
6d805429 | 677 | if (data_ret) { |
38ee087f | 678 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 679 | } |
6d805429 | 680 | } while (data_ret != 0); |
38ee087f | 681 | |
38ee087f DG |
682 | end: |
683 | error: | |
684 | return ret; | |
685 | } | |
686 | ||
687 | /* | |
688 | * Stop tracing and wait for data availability. | |
689 | */ | |
690 | int lttng_stop_tracing(const char *session_name) | |
691 | { | |
692 | return _lttng_stop_tracing(session_name, 1); | |
693 | } | |
694 | ||
695 | /* | |
696 | * Stop tracing but _don't_ wait for data availability. | |
697 | */ | |
698 | int lttng_stop_tracing_no_wait(const char *session_name) | |
699 | { | |
700 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
701 | } |
702 | ||
703 | /* | |
601d5acf DG |
704 | * Add context to a channel. |
705 | * | |
706 | * If the given channel is NULL, add the contexts to all channels. | |
707 | * The event_name param is ignored. | |
af87c45a DG |
708 | * |
709 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 710 | */ |
cd80958d | 711 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
712 | struct lttng_event_context *ctx, const char *event_name, |
713 | const char *channel_name) | |
d65106b1 | 714 | { |
2001793c JG |
715 | int ret; |
716 | size_t len = 0; | |
717 | char *buf = NULL; | |
cd80958d DG |
718 | struct lttcomm_session_msg lsm; |
719 | ||
9ae110e2 | 720 | /* Safety check. Both are mandatory. */ |
9d697d3d | 721 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
722 | ret = -LTTNG_ERR_INVALID; |
723 | goto end; | |
cd80958d DG |
724 | } |
725 | ||
441c16a7 | 726 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
727 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
728 | ||
85076754 MD |
729 | /* If no channel name, send empty string. */ |
730 | if (channel_name == NULL) { | |
731 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
732 | sizeof(lsm.u.context.channel_name)); | |
733 | } else { | |
734 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
735 | sizeof(lsm.u.context.channel_name)); | |
736 | } | |
cd80958d | 737 | |
cac3069d | 738 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cac3069d | 739 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
740 | sizeof(lsm.session.name)); |
741 | ||
2001793c JG |
742 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
743 | size_t provider_len, ctx_len; | |
744 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
745 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
746 | ||
747 | if (!provider_name || !ctx_name) { | |
748 | ret = -LTTNG_ERR_INVALID; | |
749 | goto end; | |
750 | } | |
751 | ||
752 | provider_len = strlen(provider_name); | |
753 | if (provider_len == 0) { | |
754 | ret = -LTTNG_ERR_INVALID; | |
755 | goto end; | |
756 | } | |
757 | lsm.u.context.provider_name_len = provider_len; | |
758 | ||
759 | ctx_len = strlen(ctx_name); | |
760 | if (ctx_len == 0) { | |
761 | ret = -LTTNG_ERR_INVALID; | |
762 | goto end; | |
763 | } | |
764 | lsm.u.context.context_name_len = ctx_len; | |
765 | ||
766 | len = provider_len + ctx_len; | |
767 | buf = zmalloc(len); | |
768 | if (!buf) { | |
769 | ret = -LTTNG_ERR_NOMEM; | |
770 | goto end; | |
771 | } | |
772 | ||
773 | memcpy(buf, provider_name, provider_len); | |
774 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
775 | } | |
776 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
777 | |
778 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
779 | /* | |
780 | * Don't leak application addresses to the sessiond. | |
781 | * This is only necessary when ctx is for an app ctx otherwise | |
782 | * the values inside the union (type & config) are overwritten. | |
783 | */ | |
784 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
785 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
786 | } | |
2001793c | 787 | |
795a978d | 788 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
789 | end: |
790 | free(buf); | |
791 | return ret; | |
d65106b1 DG |
792 | } |
793 | ||
f3ed775e | 794 | /* |
9ae110e2 JG |
795 | * Enable event(s) for a channel. |
796 | * | |
797 | * If no event name is specified, all events are enabled. | |
798 | * If no channel name is specified, the default 'channel0' is used. | |
799 | * | |
800 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 801 | */ |
cd80958d | 802 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 803 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 804 | { |
f8a96544 JI |
805 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
806 | NULL, 0, NULL); | |
1df4dedd DG |
807 | } |
808 | ||
53a80697 | 809 | /* |
025faf73 | 810 | * Create or enable an event with a filter expression. |
178191b3 | 811 | * |
53a80697 MD |
812 | * Return negative error value on error. |
813 | * Return size of returned session payload data if OK. | |
814 | */ | |
025faf73 | 815 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 816 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
817 | const char *filter_expression) |
818 | { | |
f8a96544 JI |
819 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
820 | filter_expression, 0, NULL); | |
53a80697 MD |
821 | } |
822 | ||
347c5ab5 | 823 | /* |
0e115563 | 824 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
825 | * NULL if not applicable. |
826 | * | |
827 | * An event with NO loglevel and the name is * will return NULL. | |
828 | */ | |
0e115563 | 829 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
830 | { |
831 | int err; | |
0e115563 | 832 | char *agent_filter = NULL; |
347c5ab5 DG |
833 | |
834 | assert(ev); | |
835 | ||
836 | /* Don't add filter for the '*' event. */ | |
9f449915 | 837 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 838 | if (filter) { |
0e115563 | 839 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
840 | ev->name); |
841 | } else { | |
0e115563 | 842 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
843 | } |
844 | if (err < 0) { | |
845 | PERROR("asprintf"); | |
6a556f7b | 846 | goto error; |
347c5ab5 DG |
847 | } |
848 | } | |
849 | ||
850 | /* Add loglevel filtering if any for the JUL domain. */ | |
851 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
852 | char *op; | |
853 | ||
854 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
855 | op = ">="; | |
856 | } else { | |
857 | op = "=="; | |
858 | } | |
859 | ||
0e115563 | 860 | if (filter || agent_filter) { |
6a556f7b JG |
861 | char *new_filter; |
862 | ||
fb0edb23 | 863 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 864 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 865 | ev->loglevel); |
0e115563 DG |
866 | if (agent_filter) { |
867 | free(agent_filter); | |
6a556f7b | 868 | } |
0e115563 | 869 | agent_filter = new_filter; |
347c5ab5 | 870 | } else { |
0e115563 | 871 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
872 | ev->loglevel); |
873 | } | |
874 | if (err < 0) { | |
875 | PERROR("asprintf"); | |
6a556f7b | 876 | goto error; |
347c5ab5 DG |
877 | } |
878 | } | |
879 | ||
0e115563 | 880 | return agent_filter; |
6a556f7b | 881 | error: |
0e115563 | 882 | free(agent_filter); |
6a556f7b | 883 | return NULL; |
347c5ab5 DG |
884 | } |
885 | ||
137b9942 | 886 | /* |
ec166985 | 887 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
888 | * newly allocated parser context in ctxp and populate the lsm object with the |
889 | * expression len. | |
890 | * | |
891 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
892 | */ | |
893 | static int generate_filter(char *filter_expression, | |
894 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
895 | { | |
896 | int ret; | |
897 | struct filter_parser_ctx *ctx = NULL; | |
898 | FILE *fmem = NULL; | |
899 | ||
900 | assert(filter_expression); | |
901 | assert(lsm); | |
902 | assert(ctxp); | |
903 | ||
904 | /* | |
905 | * Casting const to non-const, as the underlying function will use it in | |
906 | * read-only mode. | |
907 | */ | |
908 | fmem = lttng_fmemopen((void *) filter_expression, | |
909 | strlen(filter_expression), "r"); | |
910 | if (!fmem) { | |
911 | fprintf(stderr, "Error opening memory as stream\n"); | |
912 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
913 | goto error; | |
914 | } | |
915 | ctx = filter_parser_ctx_alloc(fmem); | |
916 | if (!ctx) { | |
917 | fprintf(stderr, "Error allocating parser\n"); | |
918 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
919 | goto filter_alloc_error; | |
920 | } | |
921 | ret = filter_parser_ctx_append_ast(ctx); | |
922 | if (ret) { | |
923 | fprintf(stderr, "Parse error\n"); | |
924 | ret = -LTTNG_ERR_FILTER_INVAL; | |
925 | goto parse_error; | |
926 | } | |
137b9942 DG |
927 | if (print_xml) { |
928 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
929 | if (ret) { | |
930 | fflush(stdout); | |
931 | fprintf(stderr, "XML print error\n"); | |
932 | ret = -LTTNG_ERR_FILTER_INVAL; | |
933 | goto parse_error; | |
934 | } | |
935 | } | |
936 | ||
937 | dbg_printf("Generating IR... "); | |
938 | fflush(stdout); | |
939 | ret = filter_visitor_ir_generate(ctx); | |
940 | if (ret) { | |
941 | fprintf(stderr, "Generate IR error\n"); | |
942 | ret = -LTTNG_ERR_FILTER_INVAL; | |
943 | goto parse_error; | |
944 | } | |
945 | dbg_printf("done\n"); | |
946 | ||
947 | dbg_printf("Validating IR... "); | |
948 | fflush(stdout); | |
949 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
950 | if (ret) { | |
951 | ret = -LTTNG_ERR_FILTER_INVAL; | |
952 | goto parse_error; | |
953 | } | |
9f449915 PP |
954 | |
955 | /* Normalize globbing patterns in the expression. */ | |
956 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
957 | if (ret) { | |
958 | ret = -LTTNG_ERR_FILTER_INVAL; | |
959 | goto parse_error; | |
960 | } | |
961 | ||
9ae110e2 | 962 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
963 | ret = filter_visitor_ir_validate_string(ctx); |
964 | if (ret) { | |
965 | ret = -LTTNG_ERR_FILTER_INVAL; | |
966 | goto parse_error; | |
967 | } | |
9f449915 PP |
968 | |
969 | /* Validate globbing patterns in the expression. */ | |
970 | ret = filter_visitor_ir_validate_globbing(ctx); | |
971 | if (ret) { | |
972 | ret = -LTTNG_ERR_FILTER_INVAL; | |
973 | goto parse_error; | |
974 | } | |
975 | ||
137b9942 DG |
976 | dbg_printf("done\n"); |
977 | ||
978 | dbg_printf("Generating bytecode... "); | |
979 | fflush(stdout); | |
980 | ret = filter_visitor_bytecode_generate(ctx); | |
981 | if (ret) { | |
982 | fprintf(stderr, "Generate bytecode error\n"); | |
983 | ret = -LTTNG_ERR_FILTER_INVAL; | |
984 | goto parse_error; | |
985 | } | |
986 | dbg_printf("done\n"); | |
987 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
988 | bytecode_get_len(&ctx->bytecode->b)); | |
989 | ||
990 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
991 | + bytecode_get_len(&ctx->bytecode->b); | |
992 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
993 | ||
994 | /* No need to keep the memory stream. */ | |
995 | if (fclose(fmem) != 0) { | |
6f04ed72 | 996 | PERROR("fclose"); |
137b9942 DG |
997 | } |
998 | ||
999 | *ctxp = ctx; | |
1000 | return 0; | |
1001 | ||
1002 | parse_error: | |
137b9942 DG |
1003 | filter_ir_free(ctx); |
1004 | filter_parser_ctx_free(ctx); | |
1005 | filter_alloc_error: | |
1006 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1007 | PERROR("fclose"); |
137b9942 DG |
1008 | } |
1009 | error: | |
1010 | return ret; | |
1011 | } | |
1012 | ||
93deb080 JI |
1013 | /* |
1014 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1015 | * If no event name is specified, all events are enabled. | |
1016 | * If no channel name is specified, the default name is used. | |
1017 | * If filter expression is not NULL, the filter is set for the event. | |
1018 | * If exclusion count is not zero, the exclusions are set for the event. | |
1019 | * Returns size of returned session payload data or a negative error code. | |
1020 | */ | |
1021 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1022 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1023 | const char *original_filter_expression, |
93deb080 JI |
1024 | int exclusion_count, char **exclusion_list) |
1025 | { | |
1026 | struct lttcomm_session_msg lsm; | |
64226865 | 1027 | char *varlen_data; |
93deb080 | 1028 | int ret = 0; |
137b9942 | 1029 | unsigned int free_filter_expression = 0; |
93deb080 | 1030 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
1031 | /* |
1032 | * Cast as non-const since we may replace the filter expression | |
1033 | * by a dynamically allocated string. Otherwise, the original | |
1034 | * string is not modified. | |
1035 | */ | |
1036 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1037 | |
1038 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1039 | ret = -LTTNG_ERR_INVALID; |
1040 | goto error; | |
93deb080 JI |
1041 | } |
1042 | ||
9ae110e2 JG |
1043 | /* |
1044 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1045 | * anyway, so treat this corner-case early to eliminate |
1046 | * lttng_fmemopen error for 0-byte allocation. | |
1047 | */ | |
1048 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1049 | ret = -LTTNG_ERR_INVALID; |
1050 | goto error; | |
93deb080 JI |
1051 | } |
1052 | ||
1053 | memset(&lsm, 0, sizeof(lsm)); | |
1054 | ||
1055 | /* If no channel name, send empty string. */ | |
1056 | if (channel_name == NULL) { | |
1057 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1058 | sizeof(lsm.u.enable.channel_name)); | |
1059 | } else { | |
1060 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1061 | sizeof(lsm.u.enable.channel_name)); | |
1062 | } | |
1063 | ||
18a720cd MD |
1064 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1065 | if (ev->name[0] == '\0') { | |
1066 | /* Enable all events */ | |
1067 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1068 | } |
93deb080 | 1069 | |
6565421f | 1070 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1071 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1072 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1073 | ||
1074 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1075 | sizeof(lsm.session.name)); | |
1076 | lsm.u.enable.exclusion_count = exclusion_count; | |
1077 | lsm.u.enable.bytecode_len = 0; | |
1078 | ||
9b21e6d5 DG |
1079 | /* |
1080 | * For the JUL domain, a filter is enforced except for the enable all | |
1081 | * event. This is done to avoid having the event in all sessions thus | |
1082 | * filtering by logger name. | |
1083 | */ | |
1084 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 | 1085 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
0e115563 DG |
1086 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1087 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
3e1c9ff7 | 1088 | goto ask_sessiond; |
93deb080 JI |
1089 | } |
1090 | ||
1091 | /* | |
1092 | * We have either a filter or some exclusions, so we need to set up | |
9ae110e2 | 1093 | * a variable-length memory block from where to send the data. |
93deb080 JI |
1094 | */ |
1095 | ||
9ae110e2 | 1096 | /* Parse filter expression. */ |
5cdb6027 | 1097 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1098 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1099 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1100 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1101 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1102 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1103 | char *agent_filter; | |
64226865 | 1104 | |
347c5ab5 | 1105 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1106 | agent_filter = set_agent_filter(filter_expression, ev); |
1107 | if (!agent_filter) { | |
137b9942 | 1108 | if (!filter_expression) { |
9ae110e2 JG |
1109 | /* |
1110 | * No JUL and no filter, just skip | |
1111 | * everything below. | |
1112 | */ | |
137b9942 DG |
1113 | goto ask_sessiond; |
1114 | } | |
64226865 DG |
1115 | } else { |
1116 | /* | |
9ae110e2 JG |
1117 | * With an agent filter, the original filter has |
1118 | * been added to it thus replace the filter | |
1119 | * expression. | |
64226865 | 1120 | */ |
0e115563 | 1121 | filter_expression = agent_filter; |
e9efbcd3 | 1122 | free_filter_expression = 1; |
9b21e6d5 | 1123 | } |
9b21e6d5 | 1124 | } |
93deb080 | 1125 | |
137b9942 | 1126 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1127 | if (ret) { |
137b9942 | 1128 | goto filter_error; |
93deb080 | 1129 | } |
6b453b5e JG |
1130 | } |
1131 | ||
1132 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
1133 | + lsm.u.enable.expression_len |
1134 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
1135 | if (!varlen_data) { |
1136 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 1137 | goto mem_error; |
6b453b5e | 1138 | } |
137b9942 | 1139 | |
9ae110e2 | 1140 | /* Put exclusion names first in the data. */ |
6b453b5e JG |
1141 | while (exclusion_count--) { |
1142 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
0c82ac62 PP |
1143 | *(exclusion_list + exclusion_count), |
1144 | LTTNG_SYMBOL_NAME_LEN - 1); | |
6b453b5e | 1145 | } |
9ae110e2 | 1146 | /* Add filter expression next. */ |
6b453b5e JG |
1147 | if (lsm.u.enable.expression_len != 0) { |
1148 | memcpy(varlen_data | |
1149 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1150 | filter_expression, | |
1151 | lsm.u.enable.expression_len); | |
1152 | } | |
9ae110e2 | 1153 | /* Add filter bytecode next. */ |
137b9942 | 1154 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1155 | memcpy(varlen_data |
1156 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1157 | + lsm.u.enable.expression_len, | |
1158 | &ctx->bytecode->b, | |
1159 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1160 | } |
1161 | ||
795a978d | 1162 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
67676bd8 | 1163 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
9ae110e2 JG |
1164 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, |
1165 | NULL); | |
6b453b5e | 1166 | free(varlen_data); |
93deb080 | 1167 | |
7ca1dc6f DG |
1168 | mem_error: |
1169 | if (filter_expression && ctx) { | |
93deb080 JI |
1170 | filter_bytecode_free(ctx); |
1171 | filter_ir_free(ctx); | |
1172 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1173 | } |
1174 | filter_error: | |
1175 | if (free_filter_expression) { | |
1176 | /* | |
9ae110e2 JG |
1177 | * The filter expression has been replaced and must be freed as |
1178 | * it is not the original filter expression received as a | |
1179 | * parameter. | |
7ca1dc6f DG |
1180 | */ |
1181 | free(filter_expression); | |
93deb080 | 1182 | } |
137b9942 DG |
1183 | error: |
1184 | /* | |
9ae110e2 JG |
1185 | * Return directly to the caller and don't ask the sessiond since |
1186 | * something went wrong in the parsing of data above. | |
137b9942 | 1187 | */ |
93deb080 | 1188 | return ret; |
3e1c9ff7 DG |
1189 | |
1190 | ask_sessiond: | |
1191 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1192 | return ret; | |
93deb080 JI |
1193 | } |
1194 | ||
6e911cad MD |
1195 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1196 | struct lttng_event *ev, const char *channel_name, | |
1197 | const char *original_filter_expression) | |
1df4dedd | 1198 | { |
cd80958d | 1199 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1200 | char *varlen_data; |
1201 | int ret = 0; | |
1202 | unsigned int free_filter_expression = 0; | |
1203 | struct filter_parser_ctx *ctx = NULL; | |
1204 | /* | |
1205 | * Cast as non-const since we may replace the filter expression | |
1206 | * by a dynamically allocated string. Otherwise, the original | |
1207 | * string is not modified. | |
1208 | */ | |
1209 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1210 | |
6e911cad MD |
1211 | if (handle == NULL || ev == NULL) { |
1212 | ret = -LTTNG_ERR_INVALID; | |
1213 | goto error; | |
1214 | } | |
1215 | ||
9ae110e2 JG |
1216 | /* |
1217 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1218 | * anyway, so treat this corner-case early to eliminate |
1219 | * lttng_fmemopen error for 0-byte allocation. | |
1220 | */ | |
1221 | if (filter_expression && filter_expression[0] == '\0') { | |
1222 | ret = -LTTNG_ERR_INVALID; | |
1223 | goto error; | |
cd80958d DG |
1224 | } |
1225 | ||
441c16a7 MD |
1226 | memset(&lsm, 0, sizeof(lsm)); |
1227 | ||
85076754 MD |
1228 | /* If no channel name, send empty string. */ |
1229 | if (channel_name == NULL) { | |
1230 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1231 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1232 | } else { |
85076754 | 1233 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1234 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1235 | } |
1236 | ||
18a720cd | 1237 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1238 | |
6e911cad MD |
1239 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1240 | /* FIXME: copying non-packed struct to packed struct. */ | |
1241 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1242 | ||
cac3069d | 1243 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1244 | sizeof(lsm.session.name)); |
6e911cad | 1245 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1246 | |
6e911cad MD |
1247 | /* |
1248 | * For the JUL domain, a filter is enforced except for the | |
1249 | * disable all event. This is done to avoid having the event in | |
1250 | * all sessions thus filtering by logger name. | |
1251 | */ | |
1252 | if (filter_expression == NULL && | |
1253 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1254 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1255 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1256 | goto ask_sessiond; |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | * We have a filter, so we need to set up a variable-length | |
1261 | * memory block from where to send the data. | |
1262 | */ | |
1263 | ||
1264 | /* Parse filter expression */ | |
1265 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1266 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1267 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1268 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1269 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1270 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1271 | char *agent_filter; | |
6e911cad MD |
1272 | |
1273 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1274 | agent_filter = set_agent_filter(filter_expression, ev); |
1275 | if (!agent_filter) { | |
6e911cad | 1276 | if (!filter_expression) { |
9ae110e2 JG |
1277 | /* |
1278 | * No JUL and no filter, just skip | |
1279 | * everything below. | |
1280 | */ | |
6e911cad MD |
1281 | goto ask_sessiond; |
1282 | } | |
1283 | } else { | |
1284 | /* | |
9ae110e2 JG |
1285 | * With a JUL filter, the original filter has |
1286 | * been added to it thus replace the filter | |
1287 | * expression. | |
6e911cad | 1288 | */ |
0e115563 | 1289 | filter_expression = agent_filter; |
6e911cad MD |
1290 | free_filter_expression = 1; |
1291 | } | |
1292 | } | |
1293 | ||
1294 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1295 | if (ret) { | |
1296 | goto filter_error; | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1301 | + lsm.u.disable.expression_len); | |
1302 | if (!varlen_data) { | |
1303 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1304 | goto mem_error; | |
1305 | } | |
1306 | ||
9ae110e2 | 1307 | /* Add filter expression. */ |
6e911cad MD |
1308 | if (lsm.u.disable.expression_len != 0) { |
1309 | memcpy(varlen_data, | |
1310 | filter_expression, | |
1311 | lsm.u.disable.expression_len); | |
1312 | } | |
9ae110e2 | 1313 | /* Add filter bytecode next. */ |
6e911cad MD |
1314 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1315 | memcpy(varlen_data | |
1316 | + lsm.u.disable.expression_len, | |
1317 | &ctx->bytecode->b, | |
1318 | lsm.u.disable.bytecode_len); | |
1319 | } | |
1320 | ||
795a978d | 1321 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1322 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1323 | free(varlen_data); | |
1324 | ||
1325 | mem_error: | |
1326 | if (filter_expression && ctx) { | |
1327 | filter_bytecode_free(ctx); | |
1328 | filter_ir_free(ctx); | |
1329 | filter_parser_ctx_free(ctx); | |
1330 | } | |
1331 | filter_error: | |
1332 | if (free_filter_expression) { | |
1333 | /* | |
9ae110e2 JG |
1334 | * The filter expression has been replaced and must be freed as |
1335 | * it is not the original filter expression received as a | |
1336 | * parameter. | |
6e911cad MD |
1337 | */ |
1338 | free(filter_expression); | |
1339 | } | |
1340 | error: | |
1341 | /* | |
9ae110e2 JG |
1342 | * Return directly to the caller and don't ask the sessiond since |
1343 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1344 | */ |
1345 | return ret; | |
1346 | ||
1347 | ask_sessiond: | |
1348 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1349 | return ret; | |
1350 | } | |
1351 | ||
1352 | /* | |
9ae110e2 JG |
1353 | * Disable event(s) of a channel and domain. |
1354 | * If no event name is specified, all events are disabled. | |
1355 | * If no channel name is specified, the default 'channel0' is used. | |
1356 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1357 | */ |
1358 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1359 | const char *channel_name) | |
1360 | { | |
1361 | struct lttng_event ev; | |
1362 | ||
1363 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1364 | ev.loglevel = -1; |
6e911cad MD |
1365 | ev.type = LTTNG_EVENT_ALL; |
1366 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1367 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1368 | } |
1369 | ||
cf0bcb51 JG |
1370 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1371 | { | |
1372 | struct lttng_channel *channel = NULL; | |
1373 | struct lttng_channel_extended *extended = NULL; | |
1374 | ||
1375 | if (!domain) { | |
1376 | goto error; | |
1377 | } | |
1378 | ||
1379 | /* Validate domain. */ | |
1380 | switch (domain->type) { | |
1381 | case LTTNG_DOMAIN_UST: | |
1382 | switch (domain->buf_type) { | |
1383 | case LTTNG_BUFFER_PER_UID: | |
1384 | case LTTNG_BUFFER_PER_PID: | |
1385 | break; | |
1386 | default: | |
1387 | goto error; | |
1388 | } | |
1389 | break; | |
1390 | case LTTNG_DOMAIN_KERNEL: | |
1391 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1392 | goto error; | |
1393 | } | |
1394 | break; | |
1395 | default: | |
1396 | goto error; | |
1397 | } | |
1398 | ||
1399 | channel = zmalloc(sizeof(*channel)); | |
1400 | if (!channel) { | |
1401 | goto error; | |
1402 | } | |
1403 | ||
1404 | extended = zmalloc(sizeof(*extended)); | |
1405 | if (!extended) { | |
1406 | goto error; | |
1407 | } | |
1408 | ||
1409 | channel->attr.extended.ptr = extended; | |
1410 | ||
1411 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1412 | return channel; | |
1413 | error: | |
1414 | free(channel); | |
1415 | free(extended); | |
1416 | return NULL; | |
1417 | } | |
1418 | ||
1419 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1420 | { | |
1421 | if (!channel) { | |
1422 | return; | |
1423 | } | |
1424 | ||
1425 | if (channel->attr.extended.ptr) { | |
1426 | free(channel->attr.extended.ptr); | |
1427 | } | |
1428 | free(channel); | |
1429 | } | |
1430 | ||
1df4dedd | 1431 | /* |
9ae110e2 JG |
1432 | * Enable channel per domain |
1433 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1434 | */ |
cd80958d | 1435 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1436 | struct lttng_channel *in_chan) |
a5c5a2bd | 1437 | { |
cd80958d DG |
1438 | struct lttcomm_session_msg lsm; |
1439 | ||
9ae110e2 | 1440 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1441 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1442 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1443 | } |
1444 | ||
441c16a7 | 1445 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1446 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1447 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1448 | |
cf0bcb51 JG |
1449 | if (!in_chan->attr.extended.ptr) { |
1450 | struct lttng_channel *channel; | |
1451 | struct lttng_channel_extended *extended; | |
7d29a247 | 1452 | |
cf0bcb51 JG |
1453 | channel = lttng_channel_create(&handle->domain); |
1454 | if (!channel) { | |
1455 | return -LTTNG_ERR_NOMEM; | |
1456 | } | |
1457 | ||
1458 | /* | |
1459 | * Create a new channel in order to use default extended | |
1460 | * attribute values. | |
1461 | */ | |
1462 | extended = (struct lttng_channel_extended *) | |
1463 | channel->attr.extended.ptr; | |
1464 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1465 | lttng_channel_destroy(channel); | |
1466 | } else { | |
1467 | struct lttng_channel_extended *extended; | |
1468 | ||
1469 | extended = (struct lttng_channel_extended *) | |
1470 | in_chan->attr.extended.ptr; | |
1471 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1472 | } | |
cd80958d | 1473 | |
cf0bcb51 | 1474 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
cac3069d | 1475 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1476 | |
cac3069d | 1477 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1478 | sizeof(lsm.session.name)); |
1479 | ||
cac3069d | 1480 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1481 | } |
1df4dedd | 1482 | |
2ef84c95 | 1483 | /* |
9ae110e2 JG |
1484 | * All tracing will be stopped for registered events of the channel. |
1485 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1486 | */ |
cd80958d | 1487 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1488 | { |
cd80958d DG |
1489 | struct lttcomm_session_msg lsm; |
1490 | ||
9ae110e2 | 1491 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1492 | if (handle == NULL || name == NULL) { |
2f70b271 | 1493 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1494 | } |
1495 | ||
441c16a7 MD |
1496 | memset(&lsm, 0, sizeof(lsm)); |
1497 | ||
cd80958d | 1498 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1499 | |
cac3069d | 1500 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1501 | sizeof(lsm.u.disable.channel_name)); |
1502 | ||
cac3069d | 1503 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1504 | |
cac3069d | 1505 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1506 | sizeof(lsm.session.name)); |
1507 | ||
cac3069d | 1508 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1509 | } |
1510 | ||
ccf10263 | 1511 | /* |
9ae110e2 JG |
1512 | * Add PID to session tracker. |
1513 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1514 | */ |
1515 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1516 | { | |
1517 | struct lttcomm_session_msg lsm; | |
1518 | ||
9ae110e2 | 1519 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1520 | if (handle == NULL) { |
1521 | return -LTTNG_ERR_INVALID; | |
1522 | } | |
1523 | ||
1524 | memset(&lsm, 0, sizeof(lsm)); | |
1525 | ||
1526 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1527 | lsm.u.pid_tracker.pid = pid; | |
1528 | ||
1529 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1530 | ||
1531 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1532 | sizeof(lsm.session.name)); | |
1533 | ||
1534 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1535 | } | |
1536 | ||
1537 | /* | |
9ae110e2 JG |
1538 | * Remove PID from session tracker. |
1539 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1540 | */ |
1541 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1542 | { | |
1543 | struct lttcomm_session_msg lsm; | |
1544 | ||
9ae110e2 | 1545 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1546 | if (handle == NULL) { |
1547 | return -LTTNG_ERR_INVALID; | |
1548 | } | |
1549 | ||
1550 | memset(&lsm, 0, sizeof(lsm)); | |
1551 | ||
1552 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1553 | lsm.u.pid_tracker.pid = pid; | |
1554 | ||
1555 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1556 | ||
1557 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1558 | sizeof(lsm.session.name)); | |
1559 | ||
1560 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1561 | } | |
1562 | ||
fac6795d | 1563 | /* |
9ae110e2 JG |
1564 | * Lists all available tracepoints of domain. |
1565 | * Sets the contents of the events array. | |
1566 | * Returns the number of lttng_event entries in events; | |
1567 | * on error, returns a negative value. | |
fac6795d | 1568 | */ |
cd80958d | 1569 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1570 | struct lttng_event **events) |
fac6795d | 1571 | { |
052da939 | 1572 | int ret; |
cd80958d DG |
1573 | struct lttcomm_session_msg lsm; |
1574 | ||
9d697d3d | 1575 | if (handle == NULL) { |
2f70b271 | 1576 | return -LTTNG_ERR_INVALID; |
cd80958d | 1577 | } |
fac6795d | 1578 | |
53efb85a | 1579 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1580 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1581 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1582 | |
cac3069d | 1583 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1584 | if (ret < 0) { |
1585 | return ret; | |
eb354453 | 1586 | } |
fac6795d | 1587 | |
9f19cc17 | 1588 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1589 | } |
1590 | ||
f37d259d | 1591 | /* |
9ae110e2 JG |
1592 | * Lists all available tracepoint fields of domain. |
1593 | * Sets the contents of the event field array. | |
1594 | * Returns the number of lttng_event_field entries in events; | |
1595 | * on error, returns a negative value. | |
f37d259d MD |
1596 | */ |
1597 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1598 | struct lttng_event_field **fields) | |
1599 | { | |
1600 | int ret; | |
1601 | struct lttcomm_session_msg lsm; | |
1602 | ||
1603 | if (handle == NULL) { | |
2f70b271 | 1604 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1605 | } |
1606 | ||
53efb85a | 1607 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1608 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1609 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1610 | |
cac3069d | 1611 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1612 | if (ret < 0) { |
1613 | return ret; | |
1614 | } | |
1615 | ||
1616 | return ret / sizeof(struct lttng_event_field); | |
1617 | } | |
1618 | ||
834978fd | 1619 | /* |
9ae110e2 JG |
1620 | * Lists all available kernel system calls. Allocates and sets the contents of |
1621 | * the events array. | |
834978fd | 1622 | * |
9ae110e2 JG |
1623 | * Returns the number of lttng_event entries in events; on error, returns a |
1624 | * negative value. | |
834978fd DG |
1625 | */ |
1626 | int lttng_list_syscalls(struct lttng_event **events) | |
1627 | { | |
1628 | int ret; | |
1629 | struct lttcomm_session_msg lsm; | |
1630 | ||
1631 | if (!events) { | |
1632 | return -LTTNG_ERR_INVALID; | |
1633 | } | |
1634 | ||
1635 | memset(&lsm, 0, sizeof(lsm)); | |
1636 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1637 | /* Force kernel domain for system calls. */ | |
1638 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1639 | ||
1640 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1641 | if (ret < 0) { | |
1642 | return ret; | |
1643 | } | |
1644 | ||
1645 | return ret / sizeof(struct lttng_event); | |
1646 | } | |
1647 | ||
1657e9bb | 1648 | /* |
9ae110e2 JG |
1649 | * Returns a human readable string describing |
1650 | * the error code (a negative value). | |
1657e9bb | 1651 | */ |
9a745bc7 | 1652 | const char *lttng_strerror(int code) |
1657e9bb | 1653 | { |
f73fabfd | 1654 | return error_get_str(code); |
1657e9bb DG |
1655 | } |
1656 | ||
aaf97519 | 1657 | /* |
a4b92340 DG |
1658 | * Create a brand new session using name and url for destination. |
1659 | * | |
f73fabfd | 1660 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1661 | */ |
a4b92340 | 1662 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1663 | { |
3dd05a85 | 1664 | int ret; |
a4b92340 | 1665 | ssize_t size; |
00e2e675 | 1666 | struct lttcomm_session_msg lsm; |
a4b92340 | 1667 | struct lttng_uri *uris = NULL; |
00e2e675 | 1668 | |
a4b92340 | 1669 | if (name == NULL) { |
2f70b271 | 1670 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1671 | } |
1672 | ||
a4b92340 | 1673 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1674 | |
a4b92340 | 1675 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1676 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1677 | |
1678 | /* There should never be a data URL */ | |
bc894455 | 1679 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1680 | if (size < 0) { |
2f70b271 | 1681 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1682 | } |
1683 | ||
a4b92340 DG |
1684 | lsm.u.uri.size = size; |
1685 | ||
795a978d | 1686 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1687 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1688 | |
1689 | free(uris); | |
1690 | return ret; | |
00e2e675 DG |
1691 | } |
1692 | ||
8028d920 | 1693 | /* |
9ae110e2 JG |
1694 | * Destroy session using name. |
1695 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1696 | */ |
8fd2c92c | 1697 | static |
e20ee7c2 | 1698 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 1699 | { |
cd80958d DG |
1700 | struct lttcomm_session_msg lsm; |
1701 | ||
843f5df9 | 1702 | if (session_name == NULL) { |
2f70b271 | 1703 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1704 | } |
1705 | ||
53efb85a | 1706 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1707 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1708 | |
cac3069d DG |
1709 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1710 | sizeof(lsm.session.name)); | |
cd80958d | 1711 | |
cac3069d | 1712 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1713 | } |
1714 | ||
e20ee7c2 JD |
1715 | /* |
1716 | * Stop the session and wait for the data before destroying it | |
1717 | */ | |
1718 | int lttng_destroy_session(const char *session_name) | |
1719 | { | |
1720 | int ret; | |
1721 | ||
1722 | /* | |
1723 | * Stop the tracing and wait for the data. | |
1724 | */ | |
1725 | ret = _lttng_stop_tracing(session_name, 1); | |
1726 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1727 | goto end; | |
1728 | } | |
1729 | ||
1730 | ret = _lttng_destroy_session(session_name); | |
1731 | end: | |
1732 | return ret; | |
1733 | } | |
1734 | ||
1735 | /* | |
1736 | * Destroy the session without waiting for the data. | |
1737 | */ | |
1738 | int lttng_destroy_session_no_wait(const char *session_name) | |
1739 | { | |
1740 | int ret; | |
1741 | ||
1742 | /* | |
1743 | * Stop the tracing without waiting for the data. | |
1744 | * The session might already have been stopped, so just | |
1745 | * skip this error. | |
1746 | */ | |
1747 | ret = _lttng_stop_tracing(session_name, 0); | |
1748 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1749 | goto end; | |
1750 | } | |
1751 | ||
1752 | ret = _lttng_destroy_session(session_name); | |
1753 | end: | |
1754 | return ret; | |
1755 | } | |
1756 | ||
57167058 | 1757 | /* |
9ae110e2 JG |
1758 | * Ask the session daemon for all available sessions. |
1759 | * Sets the contents of the sessions array. | |
1760 | * Returns the number of lttng_session entries in sessions; | |
1761 | * on error, returns a negative value. | |
57167058 | 1762 | */ |
ca95a216 | 1763 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1764 | { |
ca95a216 | 1765 | int ret; |
cd80958d | 1766 | struct lttcomm_session_msg lsm; |
57167058 | 1767 | |
53efb85a | 1768 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1769 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1770 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1771 | if (ret < 0) { |
ca95a216 | 1772 | return ret; |
57167058 DG |
1773 | } |
1774 | ||
ca95a216 | 1775 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1776 | } |
1777 | ||
d7ba1388 MD |
1778 | int lttng_set_session_shm_path(const char *session_name, |
1779 | const char *shm_path) | |
1780 | { | |
1781 | struct lttcomm_session_msg lsm; | |
1782 | ||
1783 | if (session_name == NULL) { | |
1784 | return -LTTNG_ERR_INVALID; | |
1785 | } | |
1786 | ||
1787 | memset(&lsm, 0, sizeof(lsm)); | |
1788 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1789 | ||
1790 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1791 | sizeof(lsm.session.name)); | |
1792 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1793 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1794 | ||
1795 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1796 | } | |
1797 | ||
9f19cc17 | 1798 | /* |
9ae110e2 JG |
1799 | * Ask the session daemon for all available domains of a session. |
1800 | * Sets the contents of the domains array. | |
1801 | * Returns the number of lttng_domain entries in domains; | |
1802 | * on error, returns a negative value. | |
9f19cc17 | 1803 | */ |
330be774 | 1804 | int lttng_list_domains(const char *session_name, |
cd80958d | 1805 | struct lttng_domain **domains) |
9f19cc17 DG |
1806 | { |
1807 | int ret; | |
cd80958d DG |
1808 | struct lttcomm_session_msg lsm; |
1809 | ||
330be774 | 1810 | if (session_name == NULL) { |
2f70b271 | 1811 | return -LTTNG_ERR_INVALID; |
cd80958d | 1812 | } |
9f19cc17 | 1813 | |
53efb85a | 1814 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1815 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1816 | ||
cac3069d DG |
1817 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1818 | sizeof(lsm.session.name)); | |
cd80958d | 1819 | |
cac3069d | 1820 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1821 | if (ret < 0) { |
1822 | return ret; | |
1823 | } | |
1824 | ||
1825 | return ret / sizeof(struct lttng_domain); | |
1826 | } | |
1827 | ||
1828 | /* | |
9ae110e2 JG |
1829 | * Ask the session daemon for all available channels of a session. |
1830 | * Sets the contents of the channels array. | |
1831 | * Returns the number of lttng_channel entries in channels; | |
1832 | * on error, returns a negative value. | |
9f19cc17 | 1833 | */ |
cd80958d DG |
1834 | int lttng_list_channels(struct lttng_handle *handle, |
1835 | struct lttng_channel **channels) | |
9f19cc17 DG |
1836 | { |
1837 | int ret; | |
53e367f9 JG |
1838 | size_t channel_count, i; |
1839 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 1840 | sizeof(struct lttng_channel_extended); |
cd80958d | 1841 | struct lttcomm_session_msg lsm; |
53e367f9 | 1842 | void *extended_at; |
cd80958d | 1843 | |
9d697d3d | 1844 | if (handle == NULL) { |
53e367f9 JG |
1845 | ret = -LTTNG_ERR_INVALID; |
1846 | goto end; | |
cd80958d DG |
1847 | } |
1848 | ||
53efb85a | 1849 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1850 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1851 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1852 | sizeof(lsm.session.name)); |
9f19cc17 | 1853 | |
cac3069d | 1854 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1855 | |
cac3069d | 1856 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 1857 | if (ret < 0) { |
53e367f9 JG |
1858 | goto end; |
1859 | } | |
1860 | ||
1861 | if (ret % channel_size) { | |
1862 | ret = -LTTNG_ERR_UNK; | |
1863 | free(*channels); | |
1864 | *channels = NULL; | |
1865 | goto end; | |
9f19cc17 | 1866 | } |
53e367f9 | 1867 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 1868 | |
53e367f9 JG |
1869 | /* Set extended info pointers */ |
1870 | extended_at = ((void *) *channels) + | |
1871 | channel_count * sizeof(struct lttng_channel); | |
1872 | for (i = 0; i < channel_count; i++) { | |
1873 | struct lttng_channel *chan = &(*channels)[i]; | |
1874 | ||
1875 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 1876 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
1877 | } |
1878 | ||
1879 | ret = (int) channel_count; | |
1880 | end: | |
1881 | return ret; | |
9f19cc17 DG |
1882 | } |
1883 | ||
1884 | /* | |
9ae110e2 JG |
1885 | * Ask the session daemon for all available events of a session channel. |
1886 | * Sets the contents of the events array. | |
1887 | * Returns the number of lttng_event entries in events; | |
1888 | * on error, returns a negative value. | |
9f19cc17 | 1889 | */ |
cd80958d DG |
1890 | int lttng_list_events(struct lttng_handle *handle, |
1891 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1892 | { |
1893 | int ret; | |
cd80958d | 1894 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
1895 | struct lttcomm_event_command_header *cmd_header = NULL; |
1896 | size_t cmd_header_len; | |
1897 | uint32_t nb_events, i; | |
1898 | void *extended_at; | |
9f19cc17 | 1899 | |
9d697d3d DG |
1900 | /* Safety check. An handle and channel name are mandatory */ |
1901 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1902 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1903 | } |
1904 | ||
53efb85a | 1905 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1906 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1907 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1908 | sizeof(lsm.session.name)); |
cac3069d | 1909 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 1910 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 1911 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1912 | |
a04d53fc FD |
1913 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
1914 | (void **) events, (void **) &cmd_header, &cmd_header_len); | |
9f19cc17 | 1915 | if (ret < 0) { |
b4e3ceb9 | 1916 | goto error; |
9f19cc17 DG |
1917 | } |
1918 | ||
b4e3ceb9 PP |
1919 | /* Set number of events and free command header */ |
1920 | nb_events = cmd_header->nb_events; | |
1921 | if (nb_events > INT_MAX) { | |
1922 | ret = -EOVERFLOW; | |
1923 | goto error; | |
1924 | } | |
1925 | ret = (int) nb_events; | |
1926 | free(cmd_header); | |
1927 | cmd_header = NULL; | |
1928 | ||
1929 | /* Set extended info pointers */ | |
1930 | extended_at = ((void*) (*events)) + | |
1931 | nb_events * sizeof(struct lttng_event); | |
1932 | ||
1933 | for (i = 0; i < nb_events; i++) { | |
1934 | struct lttcomm_event_extended_header *ext_header; | |
1935 | struct lttng_event *event = &(*events)[i]; | |
1936 | ||
1937 | event->extended.ptr = extended_at; | |
1938 | ext_header = | |
1939 | (struct lttcomm_event_extended_header *) extended_at; | |
1940 | extended_at += sizeof(*ext_header); | |
1941 | extended_at += ext_header->filter_len; | |
795d57ce PP |
1942 | extended_at += |
1943 | ext_header->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
b4e3ceb9 PP |
1944 | } |
1945 | ||
1946 | return ret; | |
1947 | error: | |
1948 | free(cmd_header); | |
1949 | free(*events); | |
1950 | return ret; | |
9f19cc17 DG |
1951 | } |
1952 | ||
fac6795d | 1953 | /* |
1c8d13c8 TD |
1954 | * Sets the tracing_group variable with name. |
1955 | * This function allocates memory pointed to by tracing_group. | |
1956 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1957 | */ |
1958 | int lttng_set_tracing_group(const char *name) | |
1959 | { | |
9d697d3d | 1960 | if (name == NULL) { |
2f70b271 | 1961 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1962 | } |
1963 | ||
fac6795d | 1964 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1965 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1966 | } |
1967 | ||
1968 | return 0; | |
1969 | } | |
1970 | ||
cd80958d | 1971 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1972 | struct lttng_calibrate *calibrate) |
1973 | { | |
b812e5ca PP |
1974 | /* |
1975 | * This command was removed in LTTng 2.9. | |
1976 | */ | |
1977 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
1978 | } |
1979 | ||
5edd7e09 DG |
1980 | /* |
1981 | * Set default channel attributes. | |
441c16a7 | 1982 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1983 | */ |
1984 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1985 | struct lttng_channel_attr *attr) | |
1986 | { | |
294851b0 | 1987 | struct lttng_channel_extended *extended; |
cf0bcb51 | 1988 | |
5edd7e09 DG |
1989 | /* Safety check */ |
1990 | if (attr == NULL || domain == NULL) { | |
1991 | return; | |
1992 | } | |
1993 | ||
294851b0 | 1994 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
1995 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1996 | ||
0a9c6494 DG |
1997 | /* Same for all domains. */ |
1998 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1999 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2000 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2001 | ||
5edd7e09 DG |
2002 | switch (domain->type) { |
2003 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2004 | attr->switch_timer_interval = |
2005 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2006 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2007 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2008 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2009 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2010 | if (extended) { |
2011 | extended->monitor_timer_interval = | |
2012 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2013 | extended->blocking_timeout = |
2014 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2015 | } |
5edd7e09 DG |
2016 | break; |
2017 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2018 | switch (domain->buf_type) { |
2019 | case LTTNG_BUFFER_PER_UID: | |
2020 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2021 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2022 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2023 | attr->switch_timer_interval = |
2024 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2025 | attr->read_timer_interval = | |
2026 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2027 | if (extended) { |
2028 | extended->monitor_timer_interval = | |
2029 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2030 | extended->blocking_timeout = |
2031 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2032 | } |
0a9c6494 DG |
2033 | break; |
2034 | case LTTNG_BUFFER_PER_PID: | |
2035 | default: | |
2036 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2037 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2038 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2039 | attr->switch_timer_interval = |
2040 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2041 | attr->read_timer_interval = | |
2042 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2043 | if (extended) { |
2044 | extended->monitor_timer_interval = | |
2045 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2046 | extended->blocking_timeout = |
2047 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2048 | } |
0a9c6494 DG |
2049 | break; |
2050 | } | |
5edd7e09 | 2051 | default: |
441c16a7 | 2052 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2053 | break; |
2054 | } | |
cf0bcb51 JG |
2055 | |
2056 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2057 | } |
2058 | ||
5ba3702f JG |
2059 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2060 | uint64_t *discarded_events) | |
2061 | { | |
2062 | int ret = 0; | |
cf0bcb51 | 2063 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2064 | |
2065 | if (!channel || !discarded_events) { | |
2066 | ret = -LTTNG_ERR_INVALID; | |
2067 | goto end; | |
2068 | } | |
2069 | ||
2070 | chan_ext = channel->attr.extended.ptr; | |
2071 | if (!chan_ext) { | |
2072 | /* | |
2073 | * This can happen since the lttng_channel structure is | |
2074 | * used for other tasks where this pointer is never set. | |
2075 | */ | |
2076 | *discarded_events = 0; | |
2077 | goto end; | |
2078 | } | |
2079 | ||
2080 | *discarded_events = chan_ext->discarded_events; | |
2081 | end: | |
2082 | return ret; | |
2083 | } | |
2084 | ||
2085 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2086 | uint64_t *lost_packets) | |
2087 | { | |
2088 | int ret = 0; | |
cf0bcb51 | 2089 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2090 | |
2091 | if (!channel || !lost_packets) { | |
2092 | ret = -LTTNG_ERR_INVALID; | |
2093 | goto end; | |
2094 | } | |
2095 | ||
2096 | chan_ext = channel->attr.extended.ptr; | |
2097 | if (!chan_ext) { | |
2098 | /* | |
2099 | * This can happen since the lttng_channel structure is | |
2100 | * used for other tasks where this pointer is never set. | |
2101 | */ | |
2102 | *lost_packets = 0; | |
2103 | goto end; | |
2104 | } | |
2105 | ||
2106 | *lost_packets = chan_ext->lost_packets; | |
2107 | end: | |
2108 | return ret; | |
2109 | } | |
2110 | ||
cf0bcb51 JG |
2111 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2112 | uint64_t *monitor_timer_interval) | |
2113 | { | |
2114 | int ret = 0; | |
2115 | ||
2116 | if (!chan || !monitor_timer_interval) { | |
2117 | ret = -LTTNG_ERR_INVALID; | |
2118 | goto end; | |
2119 | } | |
2120 | ||
2121 | if (!chan->attr.extended.ptr) { | |
2122 | ret = -LTTNG_ERR_INVALID; | |
2123 | goto end; | |
2124 | } | |
2125 | ||
2126 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2127 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2128 | end: | |
2129 | return ret; | |
2130 | } | |
2131 | ||
2132 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2133 | uint64_t monitor_timer_interval) | |
2134 | { | |
2135 | int ret = 0; | |
2136 | ||
2137 | if (!chan || !chan->attr.extended.ptr) { | |
2138 | ret = -LTTNG_ERR_INVALID; | |
2139 | goto end; | |
2140 | } | |
2141 | ||
2142 | ((struct lttng_channel_extended *) | |
2143 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2144 | monitor_timer_interval; | |
2145 | end: | |
2146 | return ret; | |
2147 | } | |
2148 | ||
491d1539 MD |
2149 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2150 | int64_t *blocking_timeout) | |
2151 | { | |
2152 | int ret = 0; | |
2153 | ||
2154 | if (!chan || !blocking_timeout) { | |
2155 | ret = -LTTNG_ERR_INVALID; | |
2156 | goto end; | |
2157 | } | |
2158 | ||
2159 | if (!chan->attr.extended.ptr) { | |
2160 | ret = -LTTNG_ERR_INVALID; | |
2161 | goto end; | |
2162 | } | |
2163 | ||
2164 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2165 | chan->attr.extended.ptr)->blocking_timeout; | |
2166 | end: | |
2167 | return ret; | |
2168 | } | |
2169 | ||
2170 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2171 | int64_t blocking_timeout) | |
2172 | { | |
2173 | int ret = 0; | |
2174 | int64_t msec_timeout; | |
2175 | ||
2176 | if (!chan || !chan->attr.extended.ptr) { | |
2177 | ret = -LTTNG_ERR_INVALID; | |
2178 | goto end; | |
2179 | } | |
2180 | ||
2181 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2182 | ret = -LTTNG_ERR_INVALID; | |
2183 | goto end; | |
2184 | } | |
2185 | ||
2186 | /* | |
2187 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2188 | * us to accept a narrower range of values (msecs expressed as a signed | |
2189 | * 32-bit integer). | |
2190 | */ | |
2191 | msec_timeout = blocking_timeout / 1000; | |
2192 | if (msec_timeout != (int32_t) msec_timeout) { | |
2193 | ret = -LTTNG_ERR_INVALID; | |
2194 | goto end; | |
2195 | } | |
2196 | ||
2197 | ((struct lttng_channel_extended *) | |
2198 | chan->attr.extended.ptr)->blocking_timeout = | |
2199 | blocking_timeout; | |
2200 | end: | |
2201 | return ret; | |
2202 | } | |
2203 | ||
fac6795d | 2204 | /* |
2269e89e | 2205 | * Check if session daemon is alive. |
fac6795d | 2206 | * |
2269e89e | 2207 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2208 | * On error returns a negative value. |
fac6795d | 2209 | */ |
947308c4 | 2210 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2211 | { |
2212 | int ret; | |
2213 | ||
2214 | ret = set_session_daemon_path(); | |
2215 | if (ret < 0) { | |
9ae110e2 | 2216 | /* Error. */ |
fac6795d DG |
2217 | return ret; |
2218 | } | |
2219 | ||
9d035200 | 2220 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2221 | /* |
9ae110e2 JG |
2222 | * No socket path set. Weird error which means the constructor |
2223 | * was not called. | |
2f70b271 DG |
2224 | */ |
2225 | assert(0); | |
fac6795d DG |
2226 | } |
2227 | ||
2269e89e | 2228 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2229 | if (ret < 0) { |
9ae110e2 | 2230 | /* Not alive. */ |
7d8234d9 MD |
2231 | return 0; |
2232 | } | |
7d8234d9 | 2233 | |
9ae110e2 | 2234 | /* Is alive. */ |
947308c4 | 2235 | return 1; |
fac6795d DG |
2236 | } |
2237 | ||
00e2e675 | 2238 | /* |
a4b92340 | 2239 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2240 | * |
2241 | * Return 0 on success, else a negative value. | |
2242 | */ | |
a4b92340 DG |
2243 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2244 | const char *control_url, const char *data_url) | |
00e2e675 | 2245 | { |
3dd05a85 | 2246 | int ret; |
a4b92340 | 2247 | ssize_t size; |
00e2e675 | 2248 | struct lttcomm_session_msg lsm; |
a4b92340 | 2249 | struct lttng_uri *uris = NULL; |
00e2e675 | 2250 | |
a4b92340 | 2251 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2252 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2253 | } |
2254 | ||
a4b92340 DG |
2255 | memset(&lsm, 0, sizeof(lsm)); |
2256 | ||
00e2e675 DG |
2257 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2258 | ||
cac3069d | 2259 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2260 | sizeof(lsm.session.name)); |
cac3069d | 2261 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2262 | |
bc894455 | 2263 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2264 | if (size < 0) { |
2f70b271 | 2265 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2266 | } |
2267 | ||
2268 | lsm.u.uri.size = size; | |
00e2e675 | 2269 | |
795a978d | 2270 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2271 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2272 | |
2273 | free(uris); | |
2274 | return ret; | |
00e2e675 DG |
2275 | } |
2276 | ||
2277 | /* | |
9c6bda17 | 2278 | * [OBSOLETE] |
00e2e675 DG |
2279 | */ |
2280 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2281 | { | |
785d2d0d | 2282 | return -ENOSYS; |
00e2e675 DG |
2283 | } |
2284 | ||
2285 | /* | |
9c6bda17 | 2286 | * [OBSOLETE] |
00e2e675 DG |
2287 | */ |
2288 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2289 | { | |
785d2d0d | 2290 | return -ENOSYS; |
00e2e675 DG |
2291 | } |
2292 | ||
07424f16 DG |
2293 | /* |
2294 | * This is an extension of create session that is ONLY and SHOULD only be used | |
2295 | * by the lttng command line program. It exists to avoid using URI parsing in | |
2296 | * the lttng client. | |
2297 | * | |
2298 | * We need the date and time for the trace path subdirectory for the case where | |
2299 | * the user does NOT define one using either -o or -U. Using the normal | |
2300 | * lttng_create_session API call, we have no clue on the session daemon side if | |
2301 | * the URL was generated automatically by the client or define by the user. | |
2302 | * | |
2303 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
2304 | * string and appends it if necessary to the URI subdirectory before sending it | |
2305 | * to the session daemon. | |
2306 | * | |
2307 | * With this extra function, the lttng_create_session call behavior is not | |
2308 | * changed and the timestamp is appended to the URI on the session daemon side | |
2309 | * if necessary. | |
2310 | */ | |
2311 | int _lttng_create_session_ext(const char *name, const char *url, | |
2312 | const char *datetime) | |
2313 | { | |
3dd05a85 | 2314 | int ret; |
07424f16 DG |
2315 | ssize_t size; |
2316 | struct lttcomm_session_msg lsm; | |
2317 | struct lttng_uri *uris = NULL; | |
2318 | ||
2bba9e53 | 2319 | if (name == NULL || datetime == NULL) { |
2f70b271 | 2320 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
2321 | } |
2322 | ||
2323 | memset(&lsm, 0, sizeof(lsm)); | |
2324 | ||
2325 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 2326 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 | 2327 | |
9ae110e2 | 2328 | /* There should never be a data URL. */ |
bc894455 | 2329 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 2330 | if (size < 0) { |
3dd05a85 DG |
2331 | ret = -LTTNG_ERR_INVALID; |
2332 | goto error; | |
07424f16 DG |
2333 | } |
2334 | ||
2335 | lsm.u.uri.size = size; | |
2336 | ||
4b35a6b3 | 2337 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
2338 | /* Don't append datetime if the name was automatically created. */ |
2339 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
2340 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
2341 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
2342 | name, datetime); | |
2343 | } else { | |
2344 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2345 | } | |
07424f16 DG |
2346 | if (ret < 0) { |
2347 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
2348 | ret = -LTTNG_ERR_FATAL; |
2349 | goto error; | |
07424f16 DG |
2350 | } |
2351 | } | |
2352 | ||
795a978d | 2353 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2354 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2355 | |
2356 | error: | |
2357 | free(uris); | |
2358 | return ret; | |
07424f16 DG |
2359 | } |
2360 | ||
806e2684 DG |
2361 | /* |
2362 | * For a given session name, this call checks if the data is ready to be read | |
2363 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2364 | * any readers. | |
2365 | */ | |
6d805429 | 2366 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2367 | { |
2368 | int ret; | |
2369 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2370 | uint8_t *pending = NULL; |
806e2684 DG |
2371 | |
2372 | if (session_name == NULL) { | |
2373 | return -LTTNG_ERR_INVALID; | |
2374 | } | |
2375 | ||
53efb85a | 2376 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2377 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2378 | |
cac3069d DG |
2379 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2380 | sizeof(lsm.session.name)); | |
806e2684 | 2381 | |
f6151c55 JG |
2382 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2383 | if (ret < 0) { | |
2384 | goto end; | |
2385 | } else if (ret != 1) { | |
2386 | /* Unexpected payload size */ | |
2387 | ret = -LTTNG_ERR_INVALID; | |
2388 | goto end; | |
806e2684 DG |
2389 | } |
2390 | ||
f6151c55 JG |
2391 | ret = (int) *pending; |
2392 | end: | |
2393 | free(pending); | |
806e2684 DG |
2394 | return ret; |
2395 | } | |
2396 | ||
27babd3a DG |
2397 | /* |
2398 | * Create a session exclusively used for snapshot. | |
2399 | * | |
2400 | * Returns LTTNG_OK on success or a negative error code. | |
2401 | */ | |
2402 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2403 | { | |
2404 | int ret; | |
2405 | ssize_t size; | |
2406 | struct lttcomm_session_msg lsm; | |
2407 | struct lttng_uri *uris = NULL; | |
2408 | ||
2409 | if (name == NULL) { | |
2410 | return -LTTNG_ERR_INVALID; | |
2411 | } | |
2412 | ||
2413 | memset(&lsm, 0, sizeof(lsm)); | |
2414 | ||
2415 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
2416 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2417 | ||
2418 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2419 | if (size < 0) { | |
2420 | return -LTTNG_ERR_INVALID; | |
2421 | } | |
2422 | ||
2423 | lsm.u.uri.size = size; | |
2424 | ||
10d65351 JD |
2425 | /* |
2426 | * If the user does not specify a custom subdir, use the session name. | |
2427 | */ | |
2428 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { | |
2429 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2430 | if (ret < 0) { | |
2431 | PERROR("snprintf uri subdir"); | |
2432 | ret = -LTTNG_ERR_FATAL; | |
2433 | goto error; | |
2434 | } | |
2435 | } | |
2436 | ||
795a978d | 2437 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
27babd3a DG |
2438 | sizeof(struct lttng_uri) * size, NULL); |
2439 | ||
10d65351 | 2440 | error: |
27babd3a DG |
2441 | free(uris); |
2442 | return ret; | |
2443 | } | |
2444 | ||
ecc48a90 JD |
2445 | /* |
2446 | * Create a session exclusively used for live. | |
2447 | * | |
2448 | * Returns LTTNG_OK on success or a negative error code. | |
2449 | */ | |
2450 | int lttng_create_session_live(const char *name, const char *url, | |
2451 | unsigned int timer_interval) | |
2452 | { | |
2453 | int ret; | |
2454 | ssize_t size; | |
2455 | struct lttcomm_session_msg lsm; | |
2456 | struct lttng_uri *uris = NULL; | |
2457 | ||
92805ee4 | 2458 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
2459 | return -LTTNG_ERR_INVALID; |
2460 | } | |
2461 | ||
2462 | memset(&lsm, 0, sizeof(lsm)); | |
2463 | ||
2464 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
2465 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2466 | ||
1a241656 DG |
2467 | if (url) { |
2468 | size = uri_parse_str_urls(url, NULL, &uris); | |
2469 | if (size <= 0) { | |
2470 | ret = -LTTNG_ERR_INVALID; | |
2471 | goto end; | |
2472 | } | |
ecc48a90 | 2473 | |
1a241656 DG |
2474 | /* file:// is not accepted for live session. */ |
2475 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
2476 | ret = -LTTNG_ERR_INVALID; | |
2477 | goto end; | |
2478 | } | |
2479 | } else { | |
2480 | size = 0; | |
ecc48a90 JD |
2481 | } |
2482 | ||
2483 | lsm.u.session_live.nb_uri = size; | |
2484 | lsm.u.session_live.timer_interval = timer_interval; | |
2485 | ||
795a978d | 2486 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
ecc48a90 JD |
2487 | sizeof(struct lttng_uri) * size, NULL); |
2488 | ||
2489 | end: | |
2490 | free(uris); | |
2491 | return ret; | |
2492 | } | |
2493 | ||
a5dfbb9d MD |
2494 | /* |
2495 | * List PIDs in the tracker. | |
2496 | * | |
1b18ce93 JG |
2497 | * enabled is set to whether the PID tracker is enabled. |
2498 | * pids is set to an allocated array of PIDs currently tracked. On | |
2499 | * success, pids must be freed by the caller. | |
2500 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2501 | * |
2502 | * Returns 0 on success, else a negative LTTng error code. | |
2503 | */ | |
2504 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2505 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2506 | { | |
ebbf5ab7 JR |
2507 | int ret; |
2508 | int enabled = 1; | |
a5dfbb9d MD |
2509 | struct lttcomm_session_msg lsm; |
2510 | size_t nr_pids; | |
2511 | int32_t *pids; | |
2512 | ||
2513 | if (handle == NULL) { | |
2514 | return -LTTNG_ERR_INVALID; | |
2515 | } | |
2516 | ||
2517 | memset(&lsm, 0, sizeof(lsm)); | |
2518 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2519 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2520 | sizeof(lsm.session.name)); | |
2521 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2522 | ||
2523 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2524 | if (ret < 0) { | |
2525 | return ret; | |
2526 | } | |
2527 | nr_pids = ret / sizeof(int32_t); | |
2528 | if (nr_pids == 1 && pids[0] == -1) { | |
2529 | free(pids); | |
2530 | pids = NULL; | |
2531 | enabled = 0; | |
2532 | nr_pids = 0; | |
2533 | } | |
2534 | *_enabled = enabled; | |
2535 | *_pids = pids; | |
2536 | *_nr_pids = nr_pids; | |
2537 | return 0; | |
2538 | } | |
2539 | ||
93ec662e JD |
2540 | /* |
2541 | * Regenerate the metadata for a session. | |
2542 | * Return 0 on success, a negative error code on error. | |
2543 | */ | |
eded6438 | 2544 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2545 | { |
2546 | int ret; | |
2547 | struct lttcomm_session_msg lsm; | |
2548 | ||
2549 | if (!session_name) { | |
2550 | ret = -LTTNG_ERR_INVALID; | |
2551 | goto end; | |
2552 | } | |
2553 | ||
2554 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2555 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2556 | |
2557 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2558 | sizeof(lsm.session.name)); | |
2559 | ||
2560 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2561 | if (ret < 0) { | |
2562 | goto end; | |
2563 | } | |
2564 | ||
2565 | ret = 0; | |
2566 | end: | |
2567 | return ret; | |
2568 | } | |
2569 | ||
eded6438 JD |
2570 | /* |
2571 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2572 | */ | |
2573 | int lttng_metadata_regenerate(const char *session_name) | |
2574 | { | |
2575 | return lttng_regenerate_metadata(session_name); | |
2576 | } | |
2577 | ||
c2561365 JD |
2578 | /* |
2579 | * Regenerate the statedump of a session. | |
2580 | * Return 0 on success, a negative error code on error. | |
2581 | */ | |
2582 | int lttng_regenerate_statedump(const char *session_name) | |
2583 | { | |
2584 | int ret; | |
2585 | struct lttcomm_session_msg lsm; | |
2586 | ||
2587 | if (!session_name) { | |
2588 | ret = -LTTNG_ERR_INVALID; | |
2589 | goto end; | |
2590 | } | |
2591 | ||
2592 | memset(&lsm, 0, sizeof(lsm)); | |
2593 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2594 | ||
2595 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2596 | sizeof(lsm.session.name)); | |
2597 | ||
2598 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2599 | if (ret < 0) { | |
2600 | goto end; | |
2601 | } | |
2602 | ||
2603 | ret = 0; | |
2604 | end: | |
2605 | return ret; | |
2606 | } | |
2607 | ||
a58c490f JG |
2608 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2609 | { | |
2610 | int ret; | |
2611 | struct lttcomm_session_msg lsm; | |
3647288f | 2612 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2613 | |
3647288f | 2614 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2615 | if (!trigger) { |
2616 | ret = -LTTNG_ERR_INVALID; | |
2617 | goto end; | |
2618 | } | |
2619 | ||
2620 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 2621 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2622 | goto end; |
2623 | } | |
2624 | ||
3647288f JG |
2625 | ret = lttng_trigger_serialize(trigger, &buffer); |
2626 | if (ret < 0) { | |
a58c490f JG |
2627 | ret = -LTTNG_ERR_UNK; |
2628 | goto end; | |
2629 | } | |
2630 | ||
a58c490f JG |
2631 | memset(&lsm, 0, sizeof(lsm)); |
2632 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
2633 | lsm.u.trigger.length = (uint32_t) buffer.size; |
2634 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
2635 | buffer.size, NULL); | |
a58c490f | 2636 | end: |
3647288f | 2637 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
2638 | return ret; |
2639 | } | |
2640 | ||
2641 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
2642 | { | |
2643 | int ret; | |
2644 | struct lttcomm_session_msg lsm; | |
3647288f | 2645 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2646 | |
3647288f | 2647 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2648 | if (!trigger) { |
2649 | ret = -LTTNG_ERR_INVALID; | |
2650 | goto end; | |
2651 | } | |
2652 | ||
2653 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 2654 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2655 | goto end; |
2656 | } | |
2657 | ||
3647288f JG |
2658 | ret = lttng_trigger_serialize(trigger, &buffer); |
2659 | if (ret < 0) { | |
a58c490f JG |
2660 | ret = -LTTNG_ERR_UNK; |
2661 | goto end; | |
2662 | } | |
2663 | ||
a58c490f JG |
2664 | memset(&lsm, 0, sizeof(lsm)); |
2665 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
2666 | lsm.u.trigger.length = (uint32_t) buffer.size; |
2667 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
2668 | buffer.size, NULL); | |
a58c490f | 2669 | end: |
3647288f | 2670 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
2671 | return ret; |
2672 | } | |
2673 | ||
d68c9a04 JD |
2674 | int lttng_session_get_current_archive_location(const char *session_name, |
2675 | char **chunk_path) | |
2676 | { | |
2677 | struct lttcomm_session_msg lsm; | |
2678 | struct lttng_session_get_current_output_return *output_return = NULL; | |
2679 | int ret; | |
2680 | size_t path_len; | |
2681 | ||
2682 | memset(&lsm, 0, sizeof(lsm)); | |
2683 | lsm.cmd_type = LTTNG_SESSION_GET_CURRENT_OUTPUT; | |
2684 | ret = lttng_strncpy(lsm.session.name, session_name, | |
2685 | sizeof(lsm.session.name)); | |
2686 | if (ret) { | |
2687 | ret = -LTTNG_ERR_INVALID; | |
2688 | goto end; | |
2689 | } | |
2690 | ||
2691 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &output_return); | |
2692 | if (ret < 0) { | |
2693 | ret = -1; | |
2694 | goto end; | |
2695 | } | |
2696 | ||
2697 | path_len = lttng_strnlen(output_return->path, | |
2698 | sizeof(output_return->path)); | |
2699 | if (path_len == 0 || path_len == sizeof(output_return->path)) { | |
2700 | ret = -LTTNG_ERR_NO_SESSION_OUTPUT; | |
2701 | goto end; | |
2702 | } | |
2703 | ||
2704 | *chunk_path = zmalloc(path_len + 1); | |
2705 | if (!*chunk_path) { | |
2706 | ret = -1; | |
2707 | goto end; | |
2708 | } | |
2709 | memcpy(*chunk_path, output_return->path, path_len); | |
2710 | ||
2711 | ret = 0; | |
2712 | ||
2713 | end: | |
2714 | free(output_return); | |
2715 | return ret; | |
2716 | } | |
2717 | ||
fac6795d | 2718 | /* |
9ae110e2 | 2719 | * lib constructor. |
fac6795d | 2720 | */ |
b2b89e8a | 2721 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
2722 | { |
2723 | /* Set default session group */ | |
bbccc3d2 | 2724 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2725 | } |
49cca668 DG |
2726 | |
2727 | /* | |
9ae110e2 | 2728 | * lib destructor. |
49cca668 | 2729 | */ |
b2b89e8a | 2730 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
2731 | { |
2732 | free(tracing_group); | |
2733 | } |