Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
82a3637f DG |
2 | * liblttngctl.c |
3 | * | |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
fac6795d | 7 | * |
d14d33bf AM |
8 | * This library is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
10 | * as published by the Free Software Foundation. | |
82a3637f DG |
11 | * |
12 | * This library is distributed in the hope that it will be useful, | |
fac6795d | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
82a3637f DG |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. | |
16 | * | |
d14d33bf AM |
17 | * You should have received a copy of the GNU Lesser General Public License |
18 | * along with this library; if not, write to the Free Software Foundation, | |
19 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
fac6795d DG |
20 | */ |
21 | ||
6c1c0768 | 22 | #define _LGPL_SOURCE |
44a5e5eb | 23 | #include <assert.h> |
fac6795d | 24 | #include <grp.h> |
1e307fab | 25 | #include <errno.h> |
fac6795d DG |
26 | #include <stdio.h> |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | ||
990570ed DG |
31 | #include <common/common.h> |
32 | #include <common/defaults.h> | |
db758600 | 33 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 34 | #include <common/uri.h> |
feb0f3e5 | 35 | #include <common/utils.h> |
1e307fab | 36 | #include <lttng/lttng.h> |
0c89d795 | 37 | #include <lttng/health-internal.h> |
fac6795d | 38 | |
d00c599e DG |
39 | #include "filter/filter-ast.h" |
40 | #include "filter/filter-parser.h" | |
41 | #include "filter/filter-bytecode.h" | |
42 | #include "filter/memstream.h" | |
cac3069d | 43 | #include "lttng-ctl-helper.h" |
53a80697 MD |
44 | |
45 | #ifdef DEBUG | |
d00c599e | 46 | static const int print_xml = 1; |
53a80697 MD |
47 | #define dbg_printf(fmt, args...) \ |
48 | printf("[debug liblttng-ctl] " fmt, ## args) | |
49 | #else | |
d00c599e | 50 | static const int print_xml = 0; |
53a80697 MD |
51 | #define dbg_printf(fmt, args...) \ |
52 | do { \ | |
53 | /* do nothing but check printf format */ \ | |
54 | if (0) \ | |
55 | printf("[debug liblttnctl] " fmt, ## args); \ | |
56 | } while (0) | |
57 | #endif | |
58 | ||
59 | ||
fac6795d DG |
60 | /* Socket to session daemon for communication */ |
61 | static int sessiond_socket; | |
62 | static char sessiond_sock_path[PATH_MAX]; | |
63 | ||
fac6795d DG |
64 | /* Variables */ |
65 | static char *tracing_group; | |
66 | static int connected; | |
67 | ||
97e19046 DG |
68 | /* Global */ |
69 | ||
70 | /* | |
71 | * Those two variables are used by error.h to silent or control the verbosity of | |
72 | * error message. They are global to the library so application linking with it | |
73 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
74 | */ |
75 | int lttng_opt_quiet; | |
76 | int lttng_opt_verbose; | |
c7e35b03 | 77 | int lttng_opt_mi; |
97e19046 | 78 | |
99497cd0 MD |
79 | /* |
80 | * Copy string from src to dst and enforce null terminated byte. | |
81 | */ | |
cac3069d DG |
82 | LTTNG_HIDDEN |
83 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 84 | { |
e7d6716d | 85 | if (src && dst) { |
99497cd0 MD |
86 | strncpy(dst, src, len); |
87 | /* Enforce the NULL terminated byte */ | |
88 | dst[len - 1] = '\0'; | |
cd80958d DG |
89 | } else if (dst) { |
90 | dst[0] = '\0'; | |
99497cd0 MD |
91 | } |
92 | } | |
93 | ||
fac6795d | 94 | /* |
cd80958d | 95 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 96 | * |
cd80958d DG |
97 | * If domain is unknown, default domain will be the kernel. |
98 | */ | |
cac3069d DG |
99 | LTTNG_HIDDEN |
100 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
101 | struct lttng_domain *src) | |
cd80958d DG |
102 | { |
103 | if (src && dst) { | |
104 | switch (src->type) { | |
00e2e675 DG |
105 | case LTTNG_DOMAIN_KERNEL: |
106 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 107 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 108 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 109 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
110 | memcpy(dst, src, sizeof(struct lttng_domain)); |
111 | break; | |
112 | default: | |
113 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 114 | break; |
cd80958d DG |
115 | } |
116 | } | |
117 | } | |
118 | ||
119 | /* | |
120 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 121 | * |
1c8d13c8 TD |
122 | * On success, returns the number of bytes sent (>=0) |
123 | * On error, returns -1 | |
fac6795d | 124 | */ |
cd80958d | 125 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
126 | { |
127 | int ret; | |
128 | ||
129 | if (!connected) { | |
2f70b271 | 130 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 131 | goto end; |
fac6795d DG |
132 | } |
133 | ||
a4b92340 DG |
134 | DBG("LSM cmd type : %d", lsm->cmd_type); |
135 | ||
be040666 | 136 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 137 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
138 | if (ret < 0) { |
139 | ret = -LTTNG_ERR_FATAL; | |
140 | } | |
e065084a DG |
141 | |
142 | end: | |
143 | return ret; | |
144 | } | |
145 | ||
53a80697 MD |
146 | /* |
147 | * Send var len data to the session daemon. | |
148 | * | |
149 | * On success, returns the number of bytes sent (>=0) | |
150 | * On error, returns -1 | |
151 | */ | |
152 | static int send_session_varlen(void *data, size_t len) | |
153 | { | |
154 | int ret; | |
155 | ||
156 | if (!connected) { | |
2f70b271 | 157 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
158 | goto end; |
159 | } | |
a4b92340 | 160 | |
53a80697 MD |
161 | if (!data || !len) { |
162 | ret = 0; | |
163 | goto end; | |
164 | } | |
165 | ||
166 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
167 | if (ret < 0) { |
168 | ret = -LTTNG_ERR_FATAL; | |
169 | } | |
53a80697 MD |
170 | |
171 | end: | |
172 | return ret; | |
173 | } | |
174 | ||
e065084a | 175 | /* |
cd80958d | 176 | * Receive data from the sessiond socket. |
e065084a | 177 | * |
1c8d13c8 TD |
178 | * On success, returns the number of bytes received (>=0) |
179 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 180 | */ |
ca95a216 | 181 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
182 | { |
183 | int ret; | |
184 | ||
185 | if (!connected) { | |
2f70b271 | 186 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 187 | goto end; |
fac6795d DG |
188 | } |
189 | ||
ca95a216 | 190 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
191 | if (ret < 0) { |
192 | ret = -LTTNG_ERR_FATAL; | |
193 | } | |
fac6795d | 194 | |
e065084a | 195 | end: |
fac6795d DG |
196 | return ret; |
197 | } | |
198 | ||
199 | /* | |
1c8d13c8 | 200 | * Check if we are in the specified group. |
65beb5ff | 201 | * |
2269e89e | 202 | * If yes return 1, else return -1. |
947308c4 | 203 | */ |
6c71277b MD |
204 | LTTNG_HIDDEN |
205 | int lttng_check_tracing_group(void) | |
947308c4 DG |
206 | { |
207 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
208 | gid_t *grp_list; | |
209 | int grp_list_size, grp_id, i; | |
210 | int ret = -1; | |
6c71277b | 211 | const char *grp_name = tracing_group; |
947308c4 DG |
212 | |
213 | /* Get GID of group 'tracing' */ | |
214 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
215 | if (!grp_tracing) { |
216 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
217 | goto end; |
218 | } | |
219 | ||
220 | /* Get number of supplementary group IDs */ | |
221 | grp_list_size = getgroups(0, NULL); | |
222 | if (grp_list_size < 0) { | |
6f04ed72 | 223 | PERROR("getgroups"); |
947308c4 DG |
224 | goto end; |
225 | } | |
226 | ||
227 | /* Alloc group list of the right size */ | |
3f451dc0 | 228 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 229 | if (!grp_list) { |
6f04ed72 | 230 | PERROR("malloc"); |
00795392 MD |
231 | goto end; |
232 | } | |
947308c4 | 233 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 234 | if (grp_id < 0) { |
6f04ed72 | 235 | PERROR("getgroups"); |
947308c4 DG |
236 | goto free_list; |
237 | } | |
238 | ||
239 | for (i = 0; i < grp_list_size; i++) { | |
240 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 241 | ret = 1; |
947308c4 DG |
242 | break; |
243 | } | |
244 | } | |
245 | ||
246 | free_list: | |
247 | free(grp_list); | |
248 | ||
249 | end: | |
250 | return ret; | |
251 | } | |
252 | ||
253 | /* | |
2269e89e DG |
254 | * Try connect to session daemon with sock_path. |
255 | * | |
256 | * Return 0 on success, else -1 | |
257 | */ | |
258 | static int try_connect_sessiond(const char *sock_path) | |
259 | { | |
260 | int ret; | |
261 | ||
262 | /* If socket exist, we check if the daemon listens for connect. */ | |
263 | ret = access(sock_path, F_OK); | |
264 | if (ret < 0) { | |
265 | /* Not alive */ | |
2f70b271 | 266 | goto error; |
2269e89e DG |
267 | } |
268 | ||
269 | ret = lttcomm_connect_unix_sock(sock_path); | |
270 | if (ret < 0) { | |
271 | /* Not alive */ | |
2f70b271 | 272 | goto error; |
2269e89e DG |
273 | } |
274 | ||
275 | ret = lttcomm_close_unix_sock(ret); | |
276 | if (ret < 0) { | |
6f04ed72 | 277 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
278 | } |
279 | ||
280 | return 0; | |
2f70b271 DG |
281 | |
282 | error: | |
283 | return -1; | |
2269e89e DG |
284 | } |
285 | ||
286 | /* | |
2f70b271 DG |
287 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
288 | * variable. | |
289 | * | |
290 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
291 | * is somehow too long or ENOMEM). | |
947308c4 DG |
292 | */ |
293 | static int set_session_daemon_path(void) | |
294 | { | |
2269e89e DG |
295 | int in_tgroup = 0; /* In tracing group */ |
296 | uid_t uid; | |
297 | ||
298 | uid = getuid(); | |
947308c4 | 299 | |
2269e89e DG |
300 | if (uid != 0) { |
301 | /* Are we in the tracing group ? */ | |
6c71277b | 302 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
303 | } |
304 | ||
08a9c49f | 305 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
306 | lttng_ctl_copy_string(sessiond_sock_path, |
307 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 308 | } |
2269e89e | 309 | |
08a9c49f | 310 | if (uid != 0) { |
c617c0c6 MD |
311 | int ret; |
312 | ||
08a9c49f TD |
313 | if (in_tgroup) { |
314 | /* Tracing group */ | |
315 | ret = try_connect_sessiond(sessiond_sock_path); | |
316 | if (ret >= 0) { | |
317 | goto end; | |
2269e89e | 318 | } |
08a9c49f | 319 | /* Global session daemon not available... */ |
2269e89e | 320 | } |
08a9c49f TD |
321 | /* ...or not in tracing group (and not root), default */ |
322 | ||
323 | /* | |
324 | * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; | |
325 | * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) | |
326 | */ | |
327 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 328 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 329 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 330 | goto error; |
947308c4 | 331 | } |
947308c4 | 332 | } |
08a9c49f | 333 | end: |
947308c4 | 334 | return 0; |
2f70b271 DG |
335 | |
336 | error: | |
337 | return -1; | |
947308c4 DG |
338 | } |
339 | ||
65beb5ff DG |
340 | /* |
341 | * Connect to the LTTng session daemon. | |
342 | * | |
343 | * On success, return 0. On error, return -1. | |
344 | */ | |
345 | static int connect_sessiond(void) | |
346 | { | |
347 | int ret; | |
348 | ||
da3c9ec1 DG |
349 | /* Don't try to connect if already connected. */ |
350 | if (connected) { | |
351 | return 0; | |
352 | } | |
353 | ||
65beb5ff DG |
354 | ret = set_session_daemon_path(); |
355 | if (ret < 0) { | |
2f70b271 | 356 | goto error; |
65beb5ff DG |
357 | } |
358 | ||
359 | /* Connect to the sesssion daemon */ | |
360 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); | |
361 | if (ret < 0) { | |
2f70b271 | 362 | goto error; |
65beb5ff DG |
363 | } |
364 | ||
365 | sessiond_socket = ret; | |
366 | connected = 1; | |
367 | ||
368 | return 0; | |
2f70b271 DG |
369 | |
370 | error: | |
371 | return -1; | |
65beb5ff DG |
372 | } |
373 | ||
374 | /* | |
1c8d13c8 TD |
375 | * Clean disconnect from the session daemon. |
376 | * On success, return 0. On error, return -1. | |
65beb5ff DG |
377 | */ |
378 | static int disconnect_sessiond(void) | |
379 | { | |
380 | int ret = 0; | |
381 | ||
382 | if (connected) { | |
383 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
384 | sessiond_socket = 0; | |
385 | connected = 0; | |
386 | } | |
387 | ||
388 | return ret; | |
389 | } | |
390 | ||
35a6fdb7 | 391 | /* |
cd80958d | 392 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 393 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 394 | * |
af87c45a | 395 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 396 | */ |
cac3069d DG |
397 | LTTNG_HIDDEN |
398 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
a4b92340 | 399 | void *vardata, size_t varlen, void **buf) |
65beb5ff DG |
400 | { |
401 | int ret; | |
402 | size_t size; | |
403 | void *data = NULL; | |
cd80958d | 404 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
405 | |
406 | ret = connect_sessiond(); | |
407 | if (ret < 0) { | |
2f70b271 | 408 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
409 | goto end; |
410 | } | |
411 | ||
65beb5ff | 412 | /* Send command to session daemon */ |
cd80958d | 413 | ret = send_session_msg(lsm); |
65beb5ff | 414 | if (ret < 0) { |
2f70b271 | 415 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
416 | goto end; |
417 | } | |
53a80697 MD |
418 | /* Send var len data */ |
419 | ret = send_session_varlen(vardata, varlen); | |
420 | if (ret < 0) { | |
2f70b271 | 421 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
422 | goto end; |
423 | } | |
65beb5ff DG |
424 | |
425 | /* Get header from data transmission */ | |
426 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
427 | if (ret < 0) { | |
2f70b271 | 428 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
429 | goto end; |
430 | } | |
431 | ||
432 | /* Check error code if OK */ | |
f73fabfd | 433 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
434 | ret = -llm.ret_code; |
435 | goto end; | |
436 | } | |
437 | ||
438 | size = llm.data_size; | |
439 | if (size == 0) { | |
874d3f84 | 440 | /* If client free with size 0 */ |
a45d5536 DG |
441 | if (buf != NULL) { |
442 | *buf = NULL; | |
443 | } | |
7d29a247 | 444 | ret = 0; |
65beb5ff DG |
445 | goto end; |
446 | } | |
447 | ||
3f451dc0 MD |
448 | data = zmalloc(size); |
449 | if (!data) { | |
450 | ret = -ENOMEM; | |
451 | goto end; | |
452 | } | |
65beb5ff DG |
453 | |
454 | /* Get payload data */ | |
455 | ret = recv_data_sessiond(data, size); | |
456 | if (ret < 0) { | |
457 | free(data); | |
458 | goto end; | |
459 | } | |
460 | ||
83009e5e DG |
461 | /* |
462 | * Extra protection not to dereference a NULL pointer. If buf is NULL at | |
463 | * this point, an error is returned and data is freed. | |
464 | */ | |
465 | if (buf == NULL) { | |
2f70b271 | 466 | ret = -LTTNG_ERR_INVALID; |
83009e5e DG |
467 | free(data); |
468 | goto end; | |
469 | } | |
470 | ||
65beb5ff DG |
471 | *buf = data; |
472 | ret = size; | |
473 | ||
474 | end: | |
475 | disconnect_sessiond(); | |
476 | return ret; | |
477 | } | |
478 | ||
9f19cc17 | 479 | /* |
cd80958d | 480 | * Create lttng handle and return pointer. |
1c8d13c8 | 481 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 482 | */ |
cd80958d DG |
483 | struct lttng_handle *lttng_create_handle(const char *session_name, |
484 | struct lttng_domain *domain) | |
9f19cc17 | 485 | { |
2f70b271 DG |
486 | struct lttng_handle *handle = NULL; |
487 | ||
488 | if (domain == NULL) { | |
489 | goto end; | |
490 | } | |
cd80958d | 491 | |
3f451dc0 | 492 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 493 | if (handle == NULL) { |
2f70b271 | 494 | PERROR("malloc handle"); |
cd80958d DG |
495 | goto end; |
496 | } | |
497 | ||
498 | /* Copy session name */ | |
cac3069d | 499 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
500 | sizeof(handle->session_name)); |
501 | ||
502 | /* Copy lttng domain */ | |
cac3069d | 503 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); |
cd80958d DG |
504 | |
505 | end: | |
506 | return handle; | |
507 | } | |
508 | ||
509 | /* | |
510 | * Destroy handle by free(3) the pointer. | |
511 | */ | |
512 | void lttng_destroy_handle(struct lttng_handle *handle) | |
513 | { | |
0e428499 | 514 | free(handle); |
eb354453 DG |
515 | } |
516 | ||
d9800920 DG |
517 | /* |
518 | * Register an outside consumer. | |
1c8d13c8 | 519 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
520 | */ |
521 | int lttng_register_consumer(struct lttng_handle *handle, | |
522 | const char *socket_path) | |
523 | { | |
524 | struct lttcomm_session_msg lsm; | |
525 | ||
2f70b271 DG |
526 | if (handle == NULL || socket_path == NULL) { |
527 | return -LTTNG_ERR_INVALID; | |
528 | } | |
529 | ||
53efb85a | 530 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 531 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 532 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 533 | sizeof(lsm.session.name)); |
cac3069d | 534 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 535 | |
cac3069d | 536 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
d9800920 | 537 | |
cac3069d | 538 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
539 | } |
540 | ||
1df4dedd | 541 | /* |
1c8d13c8 TD |
542 | * Start tracing for all traces of the session. |
543 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 544 | */ |
6a4f824d | 545 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 546 | { |
cd80958d DG |
547 | struct lttcomm_session_msg lsm; |
548 | ||
6a4f824d | 549 | if (session_name == NULL) { |
2f70b271 | 550 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
551 | } |
552 | ||
53efb85a | 553 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 554 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 555 | |
cac3069d DG |
556 | lttng_ctl_copy_string(lsm.session.name, session_name, |
557 | sizeof(lsm.session.name)); | |
cd80958d | 558 | |
cac3069d | 559 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 560 | } |
1df4dedd DG |
561 | |
562 | /* | |
38ee087f | 563 | * Stop tracing for all traces of the session. |
f3ed775e | 564 | */ |
38ee087f | 565 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 566 | { |
38ee087f | 567 | int ret, data_ret; |
cd80958d DG |
568 | struct lttcomm_session_msg lsm; |
569 | ||
6a4f824d | 570 | if (session_name == NULL) { |
2f70b271 | 571 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
572 | } |
573 | ||
53efb85a | 574 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 575 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 576 | |
cac3069d DG |
577 | lttng_ctl_copy_string(lsm.session.name, session_name, |
578 | sizeof(lsm.session.name)); | |
cd80958d | 579 | |
cac3069d | 580 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
581 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
582 | goto error; | |
583 | } | |
584 | ||
585 | if (!wait) { | |
586 | goto end; | |
587 | } | |
588 | ||
38ee087f DG |
589 | /* Check for data availability */ |
590 | do { | |
6d805429 | 591 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
592 | if (data_ret < 0) { |
593 | /* Return the data available call error. */ | |
594 | ret = data_ret; | |
595 | goto error; | |
596 | } | |
597 | ||
598 | /* | |
599 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
600 | * returned value indicates availability. | |
601 | */ | |
6d805429 | 602 | if (data_ret) { |
38ee087f | 603 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 604 | } |
6d805429 | 605 | } while (data_ret != 0); |
38ee087f | 606 | |
38ee087f DG |
607 | end: |
608 | error: | |
609 | return ret; | |
610 | } | |
611 | ||
612 | /* | |
613 | * Stop tracing and wait for data availability. | |
614 | */ | |
615 | int lttng_stop_tracing(const char *session_name) | |
616 | { | |
617 | return _lttng_stop_tracing(session_name, 1); | |
618 | } | |
619 | ||
620 | /* | |
621 | * Stop tracing but _don't_ wait for data availability. | |
622 | */ | |
623 | int lttng_stop_tracing_no_wait(const char *session_name) | |
624 | { | |
625 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
626 | } |
627 | ||
628 | /* | |
601d5acf DG |
629 | * Add context to a channel. |
630 | * | |
631 | * If the given channel is NULL, add the contexts to all channels. | |
632 | * The event_name param is ignored. | |
af87c45a DG |
633 | * |
634 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 635 | */ |
cd80958d | 636 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
637 | struct lttng_event_context *ctx, const char *event_name, |
638 | const char *channel_name) | |
d65106b1 | 639 | { |
cd80958d DG |
640 | struct lttcomm_session_msg lsm; |
641 | ||
9d697d3d DG |
642 | /* Safety check. Both are mandatory */ |
643 | if (handle == NULL || ctx == NULL) { | |
2f70b271 | 644 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
645 | } |
646 | ||
441c16a7 MD |
647 | memset(&lsm, 0, sizeof(lsm)); |
648 | ||
cd80958d DG |
649 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
650 | ||
85076754 MD |
651 | /* If no channel name, send empty string. */ |
652 | if (channel_name == NULL) { | |
653 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
654 | sizeof(lsm.u.context.channel_name)); | |
655 | } else { | |
656 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
657 | sizeof(lsm.u.context.channel_name)); | |
658 | } | |
cd80958d | 659 | |
cac3069d | 660 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d65106b1 | 661 | |
9d697d3d | 662 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); |
d65106b1 | 663 | |
cac3069d | 664 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
665 | sizeof(lsm.session.name)); |
666 | ||
cac3069d | 667 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d65106b1 DG |
668 | } |
669 | ||
f3ed775e | 670 | /* |
1c8d13c8 TD |
671 | * Enable event(s) for a channel. |
672 | * If no event name is specified, all events are enabled. | |
673 | * If no channel name is specified, the default 'channel0' is used. | |
674 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 675 | */ |
cd80958d | 676 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 677 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 678 | { |
f8a96544 JI |
679 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
680 | NULL, 0, NULL); | |
1df4dedd DG |
681 | } |
682 | ||
53a80697 | 683 | /* |
025faf73 | 684 | * Create or enable an event with a filter expression. |
178191b3 | 685 | * |
53a80697 MD |
686 | * Return negative error value on error. |
687 | * Return size of returned session payload data if OK. | |
688 | */ | |
025faf73 | 689 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 690 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
691 | const char *filter_expression) |
692 | { | |
f8a96544 JI |
693 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
694 | filter_expression, 0, NULL); | |
53a80697 MD |
695 | } |
696 | ||
347c5ab5 | 697 | /* |
0e115563 | 698 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
699 | * NULL if not applicable. |
700 | * | |
701 | * An event with NO loglevel and the name is * will return NULL. | |
702 | */ | |
0e115563 | 703 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
704 | { |
705 | int err; | |
0e115563 | 706 | char *agent_filter = NULL; |
347c5ab5 DG |
707 | |
708 | assert(ev); | |
709 | ||
710 | /* Don't add filter for the '*' event. */ | |
711 | if (ev->name[0] != '*') { | |
712 | if (filter) { | |
0e115563 | 713 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
714 | ev->name); |
715 | } else { | |
0e115563 | 716 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
717 | } |
718 | if (err < 0) { | |
719 | PERROR("asprintf"); | |
6a556f7b | 720 | goto error; |
347c5ab5 DG |
721 | } |
722 | } | |
723 | ||
724 | /* Add loglevel filtering if any for the JUL domain. */ | |
725 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
726 | char *op; | |
727 | ||
728 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
729 | op = ">="; | |
730 | } else { | |
731 | op = "=="; | |
732 | } | |
733 | ||
0e115563 | 734 | if (filter || agent_filter) { |
6a556f7b JG |
735 | char *new_filter; |
736 | ||
fb0edb23 | 737 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 738 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 739 | ev->loglevel); |
0e115563 DG |
740 | if (agent_filter) { |
741 | free(agent_filter); | |
6a556f7b | 742 | } |
0e115563 | 743 | agent_filter = new_filter; |
347c5ab5 | 744 | } else { |
0e115563 | 745 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
746 | ev->loglevel); |
747 | } | |
748 | if (err < 0) { | |
749 | PERROR("asprintf"); | |
6a556f7b | 750 | goto error; |
347c5ab5 DG |
751 | } |
752 | } | |
753 | ||
0e115563 | 754 | return agent_filter; |
6a556f7b | 755 | error: |
0e115563 | 756 | free(agent_filter); |
6a556f7b | 757 | return NULL; |
347c5ab5 DG |
758 | } |
759 | ||
137b9942 | 760 | /* |
ec166985 | 761 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
762 | * newly allocated parser context in ctxp and populate the lsm object with the |
763 | * expression len. | |
764 | * | |
765 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
766 | */ | |
767 | static int generate_filter(char *filter_expression, | |
768 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
769 | { | |
770 | int ret; | |
771 | struct filter_parser_ctx *ctx = NULL; | |
772 | FILE *fmem = NULL; | |
773 | ||
774 | assert(filter_expression); | |
775 | assert(lsm); | |
776 | assert(ctxp); | |
777 | ||
778 | /* | |
779 | * Casting const to non-const, as the underlying function will use it in | |
780 | * read-only mode. | |
781 | */ | |
782 | fmem = lttng_fmemopen((void *) filter_expression, | |
783 | strlen(filter_expression), "r"); | |
784 | if (!fmem) { | |
785 | fprintf(stderr, "Error opening memory as stream\n"); | |
786 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
787 | goto error; | |
788 | } | |
789 | ctx = filter_parser_ctx_alloc(fmem); | |
790 | if (!ctx) { | |
791 | fprintf(stderr, "Error allocating parser\n"); | |
792 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
793 | goto filter_alloc_error; | |
794 | } | |
795 | ret = filter_parser_ctx_append_ast(ctx); | |
796 | if (ret) { | |
797 | fprintf(stderr, "Parse error\n"); | |
798 | ret = -LTTNG_ERR_FILTER_INVAL; | |
799 | goto parse_error; | |
800 | } | |
801 | ret = filter_visitor_set_parent(ctx); | |
802 | if (ret) { | |
803 | fprintf(stderr, "Set parent error\n"); | |
804 | ret = -LTTNG_ERR_FILTER_INVAL; | |
805 | goto parse_error; | |
806 | } | |
807 | if (print_xml) { | |
808 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
809 | if (ret) { | |
810 | fflush(stdout); | |
811 | fprintf(stderr, "XML print error\n"); | |
812 | ret = -LTTNG_ERR_FILTER_INVAL; | |
813 | goto parse_error; | |
814 | } | |
815 | } | |
816 | ||
817 | dbg_printf("Generating IR... "); | |
818 | fflush(stdout); | |
819 | ret = filter_visitor_ir_generate(ctx); | |
820 | if (ret) { | |
821 | fprintf(stderr, "Generate IR error\n"); | |
822 | ret = -LTTNG_ERR_FILTER_INVAL; | |
823 | goto parse_error; | |
824 | } | |
825 | dbg_printf("done\n"); | |
826 | ||
827 | dbg_printf("Validating IR... "); | |
828 | fflush(stdout); | |
829 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
830 | if (ret) { | |
831 | ret = -LTTNG_ERR_FILTER_INVAL; | |
832 | goto parse_error; | |
833 | } | |
dcd5daf2 JG |
834 | /* Validate strings used as literals in the expression */ |
835 | ret = filter_visitor_ir_validate_string(ctx); | |
836 | if (ret) { | |
837 | ret = -LTTNG_ERR_FILTER_INVAL; | |
838 | goto parse_error; | |
839 | } | |
137b9942 DG |
840 | dbg_printf("done\n"); |
841 | ||
842 | dbg_printf("Generating bytecode... "); | |
843 | fflush(stdout); | |
844 | ret = filter_visitor_bytecode_generate(ctx); | |
845 | if (ret) { | |
846 | fprintf(stderr, "Generate bytecode error\n"); | |
847 | ret = -LTTNG_ERR_FILTER_INVAL; | |
848 | goto parse_error; | |
849 | } | |
850 | dbg_printf("done\n"); | |
851 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
852 | bytecode_get_len(&ctx->bytecode->b)); | |
853 | ||
854 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
855 | + bytecode_get_len(&ctx->bytecode->b); | |
856 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
857 | ||
858 | /* No need to keep the memory stream. */ | |
859 | if (fclose(fmem) != 0) { | |
6f04ed72 | 860 | PERROR("fclose"); |
137b9942 DG |
861 | } |
862 | ||
863 | *ctxp = ctx; | |
864 | return 0; | |
865 | ||
866 | parse_error: | |
137b9942 DG |
867 | filter_ir_free(ctx); |
868 | filter_parser_ctx_free(ctx); | |
869 | filter_alloc_error: | |
870 | if (fclose(fmem) != 0) { | |
6f04ed72 | 871 | PERROR("fclose"); |
137b9942 DG |
872 | } |
873 | error: | |
874 | return ret; | |
875 | } | |
876 | ||
93deb080 JI |
877 | /* |
878 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
879 | * If no event name is specified, all events are enabled. | |
880 | * If no channel name is specified, the default name is used. | |
881 | * If filter expression is not NULL, the filter is set for the event. | |
882 | * If exclusion count is not zero, the exclusions are set for the event. | |
883 | * Returns size of returned session payload data or a negative error code. | |
884 | */ | |
885 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
886 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 887 | const char *original_filter_expression, |
93deb080 JI |
888 | int exclusion_count, char **exclusion_list) |
889 | { | |
890 | struct lttcomm_session_msg lsm; | |
64226865 | 891 | char *varlen_data; |
93deb080 | 892 | int ret = 0; |
137b9942 | 893 | unsigned int free_filter_expression = 0; |
93deb080 | 894 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
895 | /* |
896 | * Cast as non-const since we may replace the filter expression | |
897 | * by a dynamically allocated string. Otherwise, the original | |
898 | * string is not modified. | |
899 | */ | |
900 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
901 | |
902 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
903 | ret = -LTTNG_ERR_INVALID; |
904 | goto error; | |
93deb080 JI |
905 | } |
906 | ||
907 | /* Empty filter string will always be rejected by the parser | |
908 | * anyway, so treat this corner-case early to eliminate | |
909 | * lttng_fmemopen error for 0-byte allocation. | |
910 | */ | |
911 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
912 | ret = -LTTNG_ERR_INVALID; |
913 | goto error; | |
93deb080 JI |
914 | } |
915 | ||
916 | memset(&lsm, 0, sizeof(lsm)); | |
917 | ||
918 | /* If no channel name, send empty string. */ | |
919 | if (channel_name == NULL) { | |
920 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
921 | sizeof(lsm.u.enable.channel_name)); | |
922 | } else { | |
923 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
924 | sizeof(lsm.u.enable.channel_name)); | |
925 | } | |
926 | ||
18a720cd MD |
927 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
928 | if (ev->name[0] == '\0') { | |
929 | /* Enable all events */ | |
930 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 931 | } |
93deb080 | 932 | |
6565421f | 933 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 934 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
935 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
936 | ||
937 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
938 | sizeof(lsm.session.name)); | |
939 | lsm.u.enable.exclusion_count = exclusion_count; | |
940 | lsm.u.enable.bytecode_len = 0; | |
941 | ||
9b21e6d5 DG |
942 | /* |
943 | * For the JUL domain, a filter is enforced except for the enable all | |
944 | * event. This is done to avoid having the event in all sessions thus | |
945 | * filtering by logger name. | |
946 | */ | |
947 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 | 948 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
0e115563 DG |
949 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
950 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
3e1c9ff7 | 951 | goto ask_sessiond; |
93deb080 JI |
952 | } |
953 | ||
954 | /* | |
955 | * We have either a filter or some exclusions, so we need to set up | |
956 | * a variable-length memory block from where to send the data | |
957 | */ | |
958 | ||
959 | /* Parse filter expression */ | |
5cdb6027 | 960 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
961 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
962 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 963 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
964 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
965 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
966 | char *agent_filter; | |
64226865 | 967 | |
347c5ab5 | 968 | /* Setup JUL filter if needed. */ |
0e115563 DG |
969 | agent_filter = set_agent_filter(filter_expression, ev); |
970 | if (!agent_filter) { | |
137b9942 DG |
971 | if (!filter_expression) { |
972 | /* No JUL and no filter, just skip everything below. */ | |
973 | goto ask_sessiond; | |
974 | } | |
64226865 DG |
975 | } else { |
976 | /* | |
0e115563 DG |
977 | * With an agent filter, the original filter has been added to |
978 | * it thus replace the filter expression. | |
64226865 | 979 | */ |
0e115563 | 980 | filter_expression = agent_filter; |
e9efbcd3 | 981 | free_filter_expression = 1; |
9b21e6d5 | 982 | } |
9b21e6d5 | 983 | } |
93deb080 | 984 | |
137b9942 | 985 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 986 | if (ret) { |
137b9942 | 987 | goto filter_error; |
93deb080 | 988 | } |
6b453b5e JG |
989 | } |
990 | ||
991 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
992 | + lsm.u.enable.expression_len |
993 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
994 | if (!varlen_data) { |
995 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 996 | goto mem_error; |
6b453b5e | 997 | } |
137b9942 | 998 | |
6b453b5e JG |
999 | /* Put exclusion names first in the data */ |
1000 | while (exclusion_count--) { | |
1001 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
0c82ac62 PP |
1002 | *(exclusion_list + exclusion_count), |
1003 | LTTNG_SYMBOL_NAME_LEN - 1); | |
6b453b5e JG |
1004 | } |
1005 | /* Add filter expression next */ | |
1006 | if (lsm.u.enable.expression_len != 0) { | |
1007 | memcpy(varlen_data | |
1008 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1009 | filter_expression, | |
1010 | lsm.u.enable.expression_len); | |
1011 | } | |
1012 | /* Add filter bytecode next */ | |
137b9942 | 1013 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1014 | memcpy(varlen_data |
1015 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1016 | + lsm.u.enable.expression_len, | |
1017 | &ctx->bytecode->b, | |
1018 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1019 | } |
1020 | ||
1021 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data, | |
67676bd8 | 1022 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
137b9942 | 1023 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, NULL); |
6b453b5e | 1024 | free(varlen_data); |
93deb080 | 1025 | |
7ca1dc6f DG |
1026 | mem_error: |
1027 | if (filter_expression && ctx) { | |
93deb080 JI |
1028 | filter_bytecode_free(ctx); |
1029 | filter_ir_free(ctx); | |
1030 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1031 | } |
1032 | filter_error: | |
1033 | if (free_filter_expression) { | |
1034 | /* | |
1035 | * The filter expression has been replaced and must be freed as it is | |
1036 | * not the original filter expression received as a parameter. | |
1037 | */ | |
1038 | free(filter_expression); | |
93deb080 | 1039 | } |
137b9942 DG |
1040 | error: |
1041 | /* | |
1042 | * Return directly to the caller and don't ask the sessiond since something | |
1043 | * went wrong in the parsing of data above. | |
1044 | */ | |
93deb080 | 1045 | return ret; |
3e1c9ff7 DG |
1046 | |
1047 | ask_sessiond: | |
1048 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1049 | return ret; | |
93deb080 JI |
1050 | } |
1051 | ||
6e911cad MD |
1052 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1053 | struct lttng_event *ev, const char *channel_name, | |
1054 | const char *original_filter_expression) | |
1df4dedd | 1055 | { |
cd80958d | 1056 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1057 | char *varlen_data; |
1058 | int ret = 0; | |
1059 | unsigned int free_filter_expression = 0; | |
1060 | struct filter_parser_ctx *ctx = NULL; | |
1061 | /* | |
1062 | * Cast as non-const since we may replace the filter expression | |
1063 | * by a dynamically allocated string. Otherwise, the original | |
1064 | * string is not modified. | |
1065 | */ | |
1066 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1067 | |
6e911cad MD |
1068 | if (handle == NULL || ev == NULL) { |
1069 | ret = -LTTNG_ERR_INVALID; | |
1070 | goto error; | |
1071 | } | |
1072 | ||
1073 | /* Empty filter string will always be rejected by the parser | |
1074 | * anyway, so treat this corner-case early to eliminate | |
1075 | * lttng_fmemopen error for 0-byte allocation. | |
1076 | */ | |
1077 | if (filter_expression && filter_expression[0] == '\0') { | |
1078 | ret = -LTTNG_ERR_INVALID; | |
1079 | goto error; | |
cd80958d DG |
1080 | } |
1081 | ||
441c16a7 MD |
1082 | memset(&lsm, 0, sizeof(lsm)); |
1083 | ||
85076754 MD |
1084 | /* If no channel name, send empty string. */ |
1085 | if (channel_name == NULL) { | |
1086 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1087 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1088 | } else { |
85076754 | 1089 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1090 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1091 | } |
1092 | ||
18a720cd | 1093 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1094 | |
6e911cad MD |
1095 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1096 | /* FIXME: copying non-packed struct to packed struct. */ | |
1097 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1098 | ||
cac3069d | 1099 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1100 | sizeof(lsm.session.name)); |
6e911cad | 1101 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1102 | |
6e911cad MD |
1103 | /* |
1104 | * For the JUL domain, a filter is enforced except for the | |
1105 | * disable all event. This is done to avoid having the event in | |
1106 | * all sessions thus filtering by logger name. | |
1107 | */ | |
1108 | if (filter_expression == NULL && | |
1109 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1110 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1111 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1112 | goto ask_sessiond; |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * We have a filter, so we need to set up a variable-length | |
1117 | * memory block from where to send the data. | |
1118 | */ | |
1119 | ||
1120 | /* Parse filter expression */ | |
1121 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1122 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1123 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1124 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1125 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1126 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1127 | char *agent_filter; | |
6e911cad MD |
1128 | |
1129 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1130 | agent_filter = set_agent_filter(filter_expression, ev); |
1131 | if (!agent_filter) { | |
6e911cad MD |
1132 | if (!filter_expression) { |
1133 | /* No JUL and no filter, just skip everything below. */ | |
1134 | goto ask_sessiond; | |
1135 | } | |
1136 | } else { | |
1137 | /* | |
1138 | * With a JUL filter, the original filter has been added to it | |
1139 | * thus replace the filter expression. | |
1140 | */ | |
0e115563 | 1141 | filter_expression = agent_filter; |
6e911cad MD |
1142 | free_filter_expression = 1; |
1143 | } | |
1144 | } | |
1145 | ||
1146 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1147 | if (ret) { | |
1148 | goto filter_error; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1153 | + lsm.u.disable.expression_len); | |
1154 | if (!varlen_data) { | |
1155 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1156 | goto mem_error; | |
1157 | } | |
1158 | ||
1159 | /* Add filter expression */ | |
1160 | if (lsm.u.disable.expression_len != 0) { | |
1161 | memcpy(varlen_data, | |
1162 | filter_expression, | |
1163 | lsm.u.disable.expression_len); | |
1164 | } | |
1165 | /* Add filter bytecode next */ | |
1166 | if (ctx && lsm.u.disable.bytecode_len != 0) { | |
1167 | memcpy(varlen_data | |
1168 | + lsm.u.disable.expression_len, | |
1169 | &ctx->bytecode->b, | |
1170 | lsm.u.disable.bytecode_len); | |
1171 | } | |
1172 | ||
1173 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data, | |
1174 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); | |
1175 | free(varlen_data); | |
1176 | ||
1177 | mem_error: | |
1178 | if (filter_expression && ctx) { | |
1179 | filter_bytecode_free(ctx); | |
1180 | filter_ir_free(ctx); | |
1181 | filter_parser_ctx_free(ctx); | |
1182 | } | |
1183 | filter_error: | |
1184 | if (free_filter_expression) { | |
1185 | /* | |
1186 | * The filter expression has been replaced and must be freed as it is | |
1187 | * not the original filter expression received as a parameter. | |
1188 | */ | |
1189 | free(filter_expression); | |
1190 | } | |
1191 | error: | |
1192 | /* | |
1193 | * Return directly to the caller and don't ask the sessiond since something | |
1194 | * went wrong in the parsing of data above. | |
1195 | */ | |
1196 | return ret; | |
1197 | ||
1198 | ask_sessiond: | |
1199 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1200 | return ret; | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Disable event(s) of a channel and domain. | |
1205 | * If no event name is specified, all events are disabled. | |
1206 | * If no channel name is specified, the default 'channel0' is used. | |
1207 | * Returns size of returned session payload data or a negative error code. | |
1208 | */ | |
1209 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1210 | const char *channel_name) | |
1211 | { | |
1212 | struct lttng_event ev; | |
1213 | ||
1214 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1215 | ev.loglevel = -1; |
6e911cad MD |
1216 | ev.type = LTTNG_EVENT_ALL; |
1217 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1218 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1219 | } |
1220 | ||
1221 | /* | |
1c8d13c8 TD |
1222 | * Enable channel per domain |
1223 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1224 | */ |
cd80958d | 1225 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 1226 | struct lttng_channel *chan) |
a5c5a2bd | 1227 | { |
cd80958d DG |
1228 | struct lttcomm_session_msg lsm; |
1229 | ||
5117eeec DG |
1230 | /* |
1231 | * NULL arguments are forbidden. No default values. | |
1232 | */ | |
1233 | if (handle == NULL || chan == NULL) { | |
2f70b271 | 1234 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1235 | } |
1236 | ||
441c16a7 MD |
1237 | memset(&lsm, 0, sizeof(lsm)); |
1238 | ||
5117eeec | 1239 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 1240 | |
cd80958d DG |
1241 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
1242 | ||
cac3069d | 1243 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1244 | |
cac3069d | 1245 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1246 | sizeof(lsm.session.name)); |
1247 | ||
cac3069d | 1248 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1249 | } |
1df4dedd | 1250 | |
2ef84c95 | 1251 | /* |
1c8d13c8 TD |
1252 | * All tracing will be stopped for registered events of the channel. |
1253 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1254 | */ |
cd80958d | 1255 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1256 | { |
cd80958d DG |
1257 | struct lttcomm_session_msg lsm; |
1258 | ||
9d697d3d DG |
1259 | /* Safety check. Both are mandatory */ |
1260 | if (handle == NULL || name == NULL) { | |
2f70b271 | 1261 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1262 | } |
1263 | ||
441c16a7 MD |
1264 | memset(&lsm, 0, sizeof(lsm)); |
1265 | ||
cd80958d | 1266 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1267 | |
cac3069d | 1268 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1269 | sizeof(lsm.u.disable.channel_name)); |
1270 | ||
cac3069d | 1271 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1272 | |
cac3069d | 1273 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1274 | sizeof(lsm.session.name)); |
1275 | ||
cac3069d | 1276 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1277 | } |
1278 | ||
ccf10263 MD |
1279 | /* |
1280 | * Add PID to session tracker. | |
1281 | * Return 0 on success else a negative LTTng error code. | |
1282 | */ | |
1283 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1284 | { | |
1285 | struct lttcomm_session_msg lsm; | |
1286 | ||
1287 | /* | |
1288 | * NULL arguments are forbidden. No default values. | |
1289 | */ | |
1290 | if (handle == NULL) { | |
1291 | return -LTTNG_ERR_INVALID; | |
1292 | } | |
1293 | ||
1294 | memset(&lsm, 0, sizeof(lsm)); | |
1295 | ||
1296 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1297 | lsm.u.pid_tracker.pid = pid; | |
1298 | ||
1299 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1300 | ||
1301 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1302 | sizeof(lsm.session.name)); | |
1303 | ||
1304 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Remove PID from session tracker. | |
1309 | * Return 0 on success else a negative LTTng error code. | |
1310 | */ | |
1311 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1312 | { | |
1313 | struct lttcomm_session_msg lsm; | |
1314 | ||
1315 | /* | |
1316 | * NULL arguments are forbidden. No default values. | |
1317 | */ | |
1318 | if (handle == NULL) { | |
1319 | return -LTTNG_ERR_INVALID; | |
1320 | } | |
1321 | ||
1322 | memset(&lsm, 0, sizeof(lsm)); | |
1323 | ||
1324 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1325 | lsm.u.pid_tracker.pid = pid; | |
1326 | ||
1327 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1328 | ||
1329 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1330 | sizeof(lsm.session.name)); | |
1331 | ||
1332 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1333 | } | |
1334 | ||
fac6795d | 1335 | /* |
1c8d13c8 TD |
1336 | * Lists all available tracepoints of domain. |
1337 | * Sets the contents of the events array. | |
1338 | * Returns the number of lttng_event entries in events; | |
1339 | * on error, returns a negative value. | |
fac6795d | 1340 | */ |
cd80958d | 1341 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1342 | struct lttng_event **events) |
fac6795d | 1343 | { |
052da939 | 1344 | int ret; |
cd80958d DG |
1345 | struct lttcomm_session_msg lsm; |
1346 | ||
9d697d3d | 1347 | if (handle == NULL) { |
2f70b271 | 1348 | return -LTTNG_ERR_INVALID; |
cd80958d | 1349 | } |
fac6795d | 1350 | |
53efb85a | 1351 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1352 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1353 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1354 | |
cac3069d | 1355 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1356 | if (ret < 0) { |
1357 | return ret; | |
eb354453 | 1358 | } |
fac6795d | 1359 | |
9f19cc17 | 1360 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1361 | } |
1362 | ||
f37d259d MD |
1363 | /* |
1364 | * Lists all available tracepoint fields of domain. | |
1365 | * Sets the contents of the event field array. | |
1366 | * Returns the number of lttng_event_field entries in events; | |
1367 | * on error, returns a negative value. | |
1368 | */ | |
1369 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1370 | struct lttng_event_field **fields) | |
1371 | { | |
1372 | int ret; | |
1373 | struct lttcomm_session_msg lsm; | |
1374 | ||
1375 | if (handle == NULL) { | |
2f70b271 | 1376 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1377 | } |
1378 | ||
53efb85a | 1379 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1380 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1381 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1382 | |
cac3069d | 1383 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1384 | if (ret < 0) { |
1385 | return ret; | |
1386 | } | |
1387 | ||
1388 | return ret / sizeof(struct lttng_event_field); | |
1389 | } | |
1390 | ||
834978fd DG |
1391 | /* |
1392 | * Lists all available kernel system calls. Allocates and sets the contents of | |
1393 | * the events array. | |
1394 | * | |
1395 | * Returns the number of lttng_event entries in events; on error, returns a | |
1396 | * negative value. | |
1397 | */ | |
1398 | int lttng_list_syscalls(struct lttng_event **events) | |
1399 | { | |
1400 | int ret; | |
1401 | struct lttcomm_session_msg lsm; | |
1402 | ||
1403 | if (!events) { | |
1404 | return -LTTNG_ERR_INVALID; | |
1405 | } | |
1406 | ||
1407 | memset(&lsm, 0, sizeof(lsm)); | |
1408 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1409 | /* Force kernel domain for system calls. */ | |
1410 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1411 | ||
1412 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1413 | if (ret < 0) { | |
1414 | return ret; | |
1415 | } | |
1416 | ||
1417 | return ret / sizeof(struct lttng_event); | |
1418 | } | |
1419 | ||
1657e9bb | 1420 | /* |
1c8d13c8 TD |
1421 | * Returns a human readable string describing |
1422 | * the error code (a negative value). | |
1657e9bb | 1423 | */ |
9a745bc7 | 1424 | const char *lttng_strerror(int code) |
1657e9bb | 1425 | { |
f73fabfd | 1426 | return error_get_str(code); |
1657e9bb DG |
1427 | } |
1428 | ||
aaf97519 | 1429 | /* |
a4b92340 DG |
1430 | * Create a brand new session using name and url for destination. |
1431 | * | |
f73fabfd | 1432 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1433 | */ |
a4b92340 | 1434 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1435 | { |
3dd05a85 | 1436 | int ret; |
a4b92340 | 1437 | ssize_t size; |
00e2e675 | 1438 | struct lttcomm_session_msg lsm; |
a4b92340 | 1439 | struct lttng_uri *uris = NULL; |
00e2e675 | 1440 | |
a4b92340 | 1441 | if (name == NULL) { |
2f70b271 | 1442 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1443 | } |
1444 | ||
a4b92340 | 1445 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1446 | |
a4b92340 | 1447 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1448 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1449 | |
1450 | /* There should never be a data URL */ | |
bc894455 | 1451 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1452 | if (size < 0) { |
2f70b271 | 1453 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1454 | } |
1455 | ||
a4b92340 DG |
1456 | lsm.u.uri.size = size; |
1457 | ||
cac3069d DG |
1458 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1459 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1460 | |
1461 | free(uris); | |
1462 | return ret; | |
00e2e675 DG |
1463 | } |
1464 | ||
8028d920 | 1465 | /* |
8028d920 | 1466 | * Destroy session using name. |
1c8d13c8 | 1467 | * Returns size of returned session payload data or a negative error code. |
8028d920 | 1468 | */ |
843f5df9 | 1469 | int lttng_destroy_session(const char *session_name) |
8028d920 | 1470 | { |
cd80958d DG |
1471 | struct lttcomm_session_msg lsm; |
1472 | ||
843f5df9 | 1473 | if (session_name == NULL) { |
2f70b271 | 1474 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1475 | } |
1476 | ||
53efb85a | 1477 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1478 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1479 | |
cac3069d DG |
1480 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1481 | sizeof(lsm.session.name)); | |
cd80958d | 1482 | |
cac3069d | 1483 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1484 | } |
1485 | ||
57167058 | 1486 | /* |
57167058 | 1487 | * Ask the session daemon for all available sessions. |
1c8d13c8 TD |
1488 | * Sets the contents of the sessions array. |
1489 | * Returns the number of lttng_session entries in sessions; | |
1490 | * on error, returns a negative value. | |
57167058 | 1491 | */ |
ca95a216 | 1492 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1493 | { |
ca95a216 | 1494 | int ret; |
cd80958d | 1495 | struct lttcomm_session_msg lsm; |
57167058 | 1496 | |
53efb85a | 1497 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1498 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1499 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1500 | if (ret < 0) { |
ca95a216 | 1501 | return ret; |
57167058 DG |
1502 | } |
1503 | ||
ca95a216 | 1504 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1505 | } |
1506 | ||
d7ba1388 MD |
1507 | int lttng_set_session_shm_path(const char *session_name, |
1508 | const char *shm_path) | |
1509 | { | |
1510 | struct lttcomm_session_msg lsm; | |
1511 | ||
1512 | if (session_name == NULL) { | |
1513 | return -LTTNG_ERR_INVALID; | |
1514 | } | |
1515 | ||
1516 | memset(&lsm, 0, sizeof(lsm)); | |
1517 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1518 | ||
1519 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1520 | sizeof(lsm.session.name)); | |
1521 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1522 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1523 | ||
1524 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1525 | } | |
1526 | ||
9f19cc17 | 1527 | /* |
1c8d13c8 TD |
1528 | * Ask the session daemon for all available domains of a session. |
1529 | * Sets the contents of the domains array. | |
1530 | * Returns the number of lttng_domain entries in domains; | |
1531 | * on error, returns a negative value. | |
9f19cc17 | 1532 | */ |
330be774 | 1533 | int lttng_list_domains(const char *session_name, |
cd80958d | 1534 | struct lttng_domain **domains) |
9f19cc17 DG |
1535 | { |
1536 | int ret; | |
cd80958d DG |
1537 | struct lttcomm_session_msg lsm; |
1538 | ||
330be774 | 1539 | if (session_name == NULL) { |
2f70b271 | 1540 | return -LTTNG_ERR_INVALID; |
cd80958d | 1541 | } |
9f19cc17 | 1542 | |
53efb85a | 1543 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1544 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1545 | ||
cac3069d DG |
1546 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1547 | sizeof(lsm.session.name)); | |
cd80958d | 1548 | |
cac3069d | 1549 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1550 | if (ret < 0) { |
1551 | return ret; | |
1552 | } | |
1553 | ||
1554 | return ret / sizeof(struct lttng_domain); | |
1555 | } | |
1556 | ||
1557 | /* | |
1c8d13c8 TD |
1558 | * Ask the session daemon for all available channels of a session. |
1559 | * Sets the contents of the channels array. | |
1560 | * Returns the number of lttng_channel entries in channels; | |
1561 | * on error, returns a negative value. | |
9f19cc17 | 1562 | */ |
cd80958d DG |
1563 | int lttng_list_channels(struct lttng_handle *handle, |
1564 | struct lttng_channel **channels) | |
9f19cc17 DG |
1565 | { |
1566 | int ret; | |
cd80958d DG |
1567 | struct lttcomm_session_msg lsm; |
1568 | ||
9d697d3d | 1569 | if (handle == NULL) { |
2f70b271 | 1570 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1571 | } |
1572 | ||
53efb85a | 1573 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1574 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1575 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1576 | sizeof(lsm.session.name)); |
9f19cc17 | 1577 | |
cac3069d | 1578 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1579 | |
cac3069d | 1580 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1581 | if (ret < 0) { |
1582 | return ret; | |
1583 | } | |
1584 | ||
1585 | return ret / sizeof(struct lttng_channel); | |
1586 | } | |
1587 | ||
1588 | /* | |
1c8d13c8 TD |
1589 | * Ask the session daemon for all available events of a session channel. |
1590 | * Sets the contents of the events array. | |
1591 | * Returns the number of lttng_event entries in events; | |
1592 | * on error, returns a negative value. | |
9f19cc17 | 1593 | */ |
cd80958d DG |
1594 | int lttng_list_events(struct lttng_handle *handle, |
1595 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1596 | { |
1597 | int ret; | |
cd80958d | 1598 | struct lttcomm_session_msg lsm; |
9f19cc17 | 1599 | |
9d697d3d DG |
1600 | /* Safety check. An handle and channel name are mandatory */ |
1601 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1602 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1603 | } |
1604 | ||
53efb85a | 1605 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1606 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1607 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1608 | sizeof(lsm.session.name)); |
cac3069d | 1609 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d DG |
1610 | sizeof(lsm.u.list.channel_name)); |
1611 | ||
cac3069d | 1612 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1613 | |
cac3069d | 1614 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) events); |
9f19cc17 DG |
1615 | if (ret < 0) { |
1616 | return ret; | |
1617 | } | |
1618 | ||
1619 | return ret / sizeof(struct lttng_event); | |
1620 | } | |
1621 | ||
fac6795d | 1622 | /* |
1c8d13c8 TD |
1623 | * Sets the tracing_group variable with name. |
1624 | * This function allocates memory pointed to by tracing_group. | |
1625 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1626 | */ |
1627 | int lttng_set_tracing_group(const char *name) | |
1628 | { | |
9d697d3d | 1629 | if (name == NULL) { |
2f70b271 | 1630 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1631 | } |
1632 | ||
fac6795d | 1633 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1634 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1635 | } |
1636 | ||
1637 | return 0; | |
1638 | } | |
1639 | ||
d0254c7c | 1640 | /* |
af87c45a | 1641 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1642 | */ |
cd80958d | 1643 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1644 | struct lttng_calibrate *calibrate) |
1645 | { | |
cd80958d | 1646 | struct lttcomm_session_msg lsm; |
d0254c7c | 1647 | |
9d697d3d DG |
1648 | /* Safety check. NULL pointer are forbidden */ |
1649 | if (handle == NULL || calibrate == NULL) { | |
2f70b271 | 1650 | return -LTTNG_ERR_INVALID; |
cd80958d | 1651 | } |
d0254c7c | 1652 | |
53efb85a | 1653 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1654 | lsm.cmd_type = LTTNG_CALIBRATE; |
cac3069d | 1655 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d0254c7c | 1656 | |
cd80958d DG |
1657 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1658 | ||
cac3069d | 1659 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d0254c7c MD |
1660 | } |
1661 | ||
5edd7e09 DG |
1662 | /* |
1663 | * Set default channel attributes. | |
441c16a7 | 1664 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1665 | */ |
1666 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1667 | struct lttng_channel_attr *attr) | |
1668 | { | |
1669 | /* Safety check */ | |
1670 | if (attr == NULL || domain == NULL) { | |
1671 | return; | |
1672 | } | |
1673 | ||
eacaa7a6 DS |
1674 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1675 | ||
0a9c6494 DG |
1676 | /* Same for all domains. */ |
1677 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1678 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1679 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1680 | ||
5edd7e09 DG |
1681 | switch (domain->type) { |
1682 | case LTTNG_DOMAIN_KERNEL: | |
d92ff3ef DG |
1683 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
1684 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
3e230f92 | 1685 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1686 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1687 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1688 | break; | |
1689 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1690 | switch (domain->buf_type) { |
1691 | case LTTNG_BUFFER_PER_UID: | |
1692 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1693 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1694 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
1695 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1696 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
1697 | break; | |
1698 | case LTTNG_BUFFER_PER_PID: | |
1699 | default: | |
1700 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1701 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1702 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
1703 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1704 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
1705 | break; | |
1706 | } | |
5edd7e09 | 1707 | default: |
441c16a7 | 1708 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1709 | break; |
1710 | } | |
1711 | } | |
1712 | ||
fac6795d | 1713 | /* |
2269e89e | 1714 | * Check if session daemon is alive. |
fac6795d | 1715 | * |
2269e89e | 1716 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1717 | * On error returns a negative value. |
fac6795d | 1718 | */ |
947308c4 | 1719 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1720 | { |
1721 | int ret; | |
1722 | ||
1723 | ret = set_session_daemon_path(); | |
1724 | if (ret < 0) { | |
947308c4 | 1725 | /* Error */ |
fac6795d DG |
1726 | return ret; |
1727 | } | |
1728 | ||
9d035200 | 1729 | if (*sessiond_sock_path == '\0') { |
2f70b271 DG |
1730 | /* |
1731 | * No socket path set. Weird error which means the constructor was not | |
1732 | * called. | |
1733 | */ | |
1734 | assert(0); | |
fac6795d DG |
1735 | } |
1736 | ||
2269e89e | 1737 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 MD |
1738 | if (ret < 0) { |
1739 | /* Not alive */ | |
1740 | return 0; | |
1741 | } | |
7d8234d9 | 1742 | |
947308c4 DG |
1743 | /* Is alive */ |
1744 | return 1; | |
fac6795d DG |
1745 | } |
1746 | ||
00e2e675 | 1747 | /* |
a4b92340 | 1748 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
1749 | * |
1750 | * Return 0 on success, else a negative value. | |
1751 | */ | |
a4b92340 DG |
1752 | int lttng_set_consumer_url(struct lttng_handle *handle, |
1753 | const char *control_url, const char *data_url) | |
00e2e675 | 1754 | { |
3dd05a85 | 1755 | int ret; |
a4b92340 | 1756 | ssize_t size; |
00e2e675 | 1757 | struct lttcomm_session_msg lsm; |
a4b92340 | 1758 | struct lttng_uri *uris = NULL; |
00e2e675 | 1759 | |
a4b92340 | 1760 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 1761 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1762 | } |
1763 | ||
a4b92340 DG |
1764 | memset(&lsm, 0, sizeof(lsm)); |
1765 | ||
00e2e675 DG |
1766 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
1767 | ||
cac3069d | 1768 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 1769 | sizeof(lsm.session.name)); |
cac3069d | 1770 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 1771 | |
bc894455 | 1772 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 1773 | if (size < 0) { |
2f70b271 | 1774 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
1775 | } |
1776 | ||
1777 | lsm.u.uri.size = size; | |
00e2e675 | 1778 | |
cac3069d DG |
1779 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1780 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1781 | |
1782 | free(uris); | |
1783 | return ret; | |
00e2e675 DG |
1784 | } |
1785 | ||
1786 | /* | |
9c6bda17 | 1787 | * [OBSOLETE] |
00e2e675 DG |
1788 | */ |
1789 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1790 | { | |
785d2d0d | 1791 | return -ENOSYS; |
00e2e675 DG |
1792 | } |
1793 | ||
1794 | /* | |
9c6bda17 | 1795 | * [OBSOLETE] |
00e2e675 DG |
1796 | */ |
1797 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1798 | { | |
785d2d0d | 1799 | return -ENOSYS; |
00e2e675 DG |
1800 | } |
1801 | ||
07424f16 DG |
1802 | /* |
1803 | * This is an extension of create session that is ONLY and SHOULD only be used | |
1804 | * by the lttng command line program. It exists to avoid using URI parsing in | |
1805 | * the lttng client. | |
1806 | * | |
1807 | * We need the date and time for the trace path subdirectory for the case where | |
1808 | * the user does NOT define one using either -o or -U. Using the normal | |
1809 | * lttng_create_session API call, we have no clue on the session daemon side if | |
1810 | * the URL was generated automatically by the client or define by the user. | |
1811 | * | |
1812 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
1813 | * string and appends it if necessary to the URI subdirectory before sending it | |
1814 | * to the session daemon. | |
1815 | * | |
1816 | * With this extra function, the lttng_create_session call behavior is not | |
1817 | * changed and the timestamp is appended to the URI on the session daemon side | |
1818 | * if necessary. | |
1819 | */ | |
1820 | int _lttng_create_session_ext(const char *name, const char *url, | |
1821 | const char *datetime) | |
1822 | { | |
3dd05a85 | 1823 | int ret; |
07424f16 DG |
1824 | ssize_t size; |
1825 | struct lttcomm_session_msg lsm; | |
1826 | struct lttng_uri *uris = NULL; | |
1827 | ||
2bba9e53 | 1828 | if (name == NULL || datetime == NULL) { |
2f70b271 | 1829 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
1830 | } |
1831 | ||
1832 | memset(&lsm, 0, sizeof(lsm)); | |
1833 | ||
1834 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 1835 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 DG |
1836 | |
1837 | /* There should never be a data URL */ | |
bc894455 | 1838 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 1839 | if (size < 0) { |
3dd05a85 DG |
1840 | ret = -LTTNG_ERR_INVALID; |
1841 | goto error; | |
07424f16 DG |
1842 | } |
1843 | ||
1844 | lsm.u.uri.size = size; | |
1845 | ||
4b35a6b3 | 1846 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
1847 | /* Don't append datetime if the name was automatically created. */ |
1848 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
1849 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
1850 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
1851 | name, datetime); | |
1852 | } else { | |
1853 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
1854 | } | |
07424f16 DG |
1855 | if (ret < 0) { |
1856 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
1857 | ret = -LTTNG_ERR_FATAL; |
1858 | goto error; | |
07424f16 DG |
1859 | } |
1860 | } | |
1861 | ||
cac3069d DG |
1862 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, |
1863 | sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
1864 | |
1865 | error: | |
1866 | free(uris); | |
1867 | return ret; | |
07424f16 DG |
1868 | } |
1869 | ||
806e2684 DG |
1870 | /* |
1871 | * For a given session name, this call checks if the data is ready to be read | |
1872 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
1873 | * any readers. | |
1874 | */ | |
6d805429 | 1875 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
1876 | { |
1877 | int ret; | |
1878 | struct lttcomm_session_msg lsm; | |
f6151c55 | 1879 | uint8_t *pending = NULL; |
806e2684 DG |
1880 | |
1881 | if (session_name == NULL) { | |
1882 | return -LTTNG_ERR_INVALID; | |
1883 | } | |
1884 | ||
53efb85a | 1885 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 1886 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 1887 | |
cac3069d DG |
1888 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1889 | sizeof(lsm.session.name)); | |
806e2684 | 1890 | |
f6151c55 JG |
1891 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
1892 | if (ret < 0) { | |
1893 | goto end; | |
1894 | } else if (ret != 1) { | |
1895 | /* Unexpected payload size */ | |
1896 | ret = -LTTNG_ERR_INVALID; | |
1897 | goto end; | |
806e2684 DG |
1898 | } |
1899 | ||
f6151c55 JG |
1900 | ret = (int) *pending; |
1901 | end: | |
1902 | free(pending); | |
806e2684 DG |
1903 | return ret; |
1904 | } | |
1905 | ||
27babd3a DG |
1906 | /* |
1907 | * Create a session exclusively used for snapshot. | |
1908 | * | |
1909 | * Returns LTTNG_OK on success or a negative error code. | |
1910 | */ | |
1911 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1912 | { | |
1913 | int ret; | |
1914 | ssize_t size; | |
1915 | struct lttcomm_session_msg lsm; | |
1916 | struct lttng_uri *uris = NULL; | |
1917 | ||
1918 | if (name == NULL) { | |
1919 | return -LTTNG_ERR_INVALID; | |
1920 | } | |
1921 | ||
1922 | memset(&lsm, 0, sizeof(lsm)); | |
1923 | ||
1924 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
1925 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1926 | ||
1927 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1928 | if (size < 0) { | |
1929 | return -LTTNG_ERR_INVALID; | |
1930 | } | |
1931 | ||
1932 | lsm.u.uri.size = size; | |
1933 | ||
1934 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1935 | sizeof(struct lttng_uri) * size, NULL); | |
1936 | ||
1937 | free(uris); | |
1938 | return ret; | |
1939 | } | |
1940 | ||
ecc48a90 JD |
1941 | /* |
1942 | * Create a session exclusively used for live. | |
1943 | * | |
1944 | * Returns LTTNG_OK on success or a negative error code. | |
1945 | */ | |
1946 | int lttng_create_session_live(const char *name, const char *url, | |
1947 | unsigned int timer_interval) | |
1948 | { | |
1949 | int ret; | |
1950 | ssize_t size; | |
1951 | struct lttcomm_session_msg lsm; | |
1952 | struct lttng_uri *uris = NULL; | |
1953 | ||
92805ee4 | 1954 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
1955 | return -LTTNG_ERR_INVALID; |
1956 | } | |
1957 | ||
1958 | memset(&lsm, 0, sizeof(lsm)); | |
1959 | ||
1960 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
1961 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
1962 | ||
1a241656 DG |
1963 | if (url) { |
1964 | size = uri_parse_str_urls(url, NULL, &uris); | |
1965 | if (size <= 0) { | |
1966 | ret = -LTTNG_ERR_INVALID; | |
1967 | goto end; | |
1968 | } | |
ecc48a90 | 1969 | |
1a241656 DG |
1970 | /* file:// is not accepted for live session. */ |
1971 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
1972 | ret = -LTTNG_ERR_INVALID; | |
1973 | goto end; | |
1974 | } | |
1975 | } else { | |
1976 | size = 0; | |
ecc48a90 JD |
1977 | } |
1978 | ||
1979 | lsm.u.session_live.nb_uri = size; | |
1980 | lsm.u.session_live.timer_interval = timer_interval; | |
1981 | ||
1982 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, uris, | |
1983 | sizeof(struct lttng_uri) * size, NULL); | |
1984 | ||
1985 | end: | |
1986 | free(uris); | |
1987 | return ret; | |
1988 | } | |
1989 | ||
a5dfbb9d MD |
1990 | /* |
1991 | * List PIDs in the tracker. | |
1992 | * | |
1b18ce93 JG |
1993 | * enabled is set to whether the PID tracker is enabled. |
1994 | * pids is set to an allocated array of PIDs currently tracked. On | |
1995 | * success, pids must be freed by the caller. | |
1996 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
1997 | * |
1998 | * Returns 0 on success, else a negative LTTng error code. | |
1999 | */ | |
2000 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2001 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2002 | { | |
ebbf5ab7 JR |
2003 | int ret; |
2004 | int enabled = 1; | |
a5dfbb9d MD |
2005 | struct lttcomm_session_msg lsm; |
2006 | size_t nr_pids; | |
2007 | int32_t *pids; | |
2008 | ||
2009 | if (handle == NULL) { | |
2010 | return -LTTNG_ERR_INVALID; | |
2011 | } | |
2012 | ||
2013 | memset(&lsm, 0, sizeof(lsm)); | |
2014 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2015 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2016 | sizeof(lsm.session.name)); | |
2017 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2018 | ||
2019 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2020 | if (ret < 0) { | |
2021 | return ret; | |
2022 | } | |
2023 | nr_pids = ret / sizeof(int32_t); | |
2024 | if (nr_pids == 1 && pids[0] == -1) { | |
2025 | free(pids); | |
2026 | pids = NULL; | |
2027 | enabled = 0; | |
2028 | nr_pids = 0; | |
2029 | } | |
2030 | *_enabled = enabled; | |
2031 | *_pids = pids; | |
2032 | *_nr_pids = nr_pids; | |
2033 | return 0; | |
2034 | } | |
2035 | ||
fac6795d DG |
2036 | /* |
2037 | * lib constructor | |
2038 | */ | |
2039 | static void __attribute__((constructor)) init() | |
2040 | { | |
2041 | /* Set default session group */ | |
bbccc3d2 | 2042 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2043 | } |
49cca668 DG |
2044 | |
2045 | /* | |
2046 | * lib destructor | |
2047 | */ | |
2048 | static void __attribute__((destructor)) lttng_ctl_exit() | |
2049 | { | |
2050 | free(tracing_group); | |
2051 | } |