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> |
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> |
fac6795d | 39 | |
d00c599e DG |
40 | #include "filter/filter-ast.h" |
41 | #include "filter/filter-parser.h" | |
42 | #include "filter/filter-bytecode.h" | |
43 | #include "filter/memstream.h" | |
cac3069d | 44 | #include "lttng-ctl-helper.h" |
53a80697 MD |
45 | |
46 | #ifdef DEBUG | |
d00c599e | 47 | static const int print_xml = 1; |
53a80697 MD |
48 | #define dbg_printf(fmt, args...) \ |
49 | printf("[debug liblttng-ctl] " fmt, ## args) | |
50 | #else | |
d00c599e | 51 | static const int print_xml = 0; |
53a80697 MD |
52 | #define dbg_printf(fmt, args...) \ |
53 | do { \ | |
54 | /* do nothing but check printf format */ \ | |
55 | if (0) \ | |
56 | printf("[debug liblttnctl] " fmt, ## args); \ | |
57 | } while (0) | |
58 | #endif | |
59 | ||
60 | ||
fac6795d DG |
61 | /* Socket to session daemon for communication */ |
62 | static int sessiond_socket; | |
63 | static char sessiond_sock_path[PATH_MAX]; | |
64 | ||
fac6795d DG |
65 | /* Variables */ |
66 | static char *tracing_group; | |
67 | static int connected; | |
68 | ||
97e19046 DG |
69 | /* Global */ |
70 | ||
71 | /* | |
72 | * Those two variables are used by error.h to silent or control the verbosity of | |
73 | * error message. They are global to the library so application linking with it | |
74 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
75 | */ |
76 | int lttng_opt_quiet; | |
77 | int lttng_opt_verbose; | |
c7e35b03 | 78 | int lttng_opt_mi; |
97e19046 | 79 | |
99497cd0 MD |
80 | /* |
81 | * Copy string from src to dst and enforce null terminated byte. | |
82 | */ | |
cac3069d DG |
83 | LTTNG_HIDDEN |
84 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 85 | { |
e7d6716d | 86 | if (src && dst) { |
99497cd0 MD |
87 | strncpy(dst, src, len); |
88 | /* Enforce the NULL terminated byte */ | |
89 | dst[len - 1] = '\0'; | |
cd80958d DG |
90 | } else if (dst) { |
91 | dst[0] = '\0'; | |
99497cd0 MD |
92 | } |
93 | } | |
94 | ||
fac6795d | 95 | /* |
cd80958d | 96 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 97 | * |
cd80958d DG |
98 | * If domain is unknown, default domain will be the kernel. |
99 | */ | |
cac3069d DG |
100 | LTTNG_HIDDEN |
101 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
102 | struct lttng_domain *src) | |
cd80958d DG |
103 | { |
104 | if (src && dst) { | |
105 | switch (src->type) { | |
00e2e675 DG |
106 | case LTTNG_DOMAIN_KERNEL: |
107 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 108 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 109 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 110 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
111 | memcpy(dst, src, sizeof(struct lttng_domain)); |
112 | break; | |
113 | default: | |
114 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 115 | break; |
cd80958d DG |
116 | } |
117 | } | |
118 | } | |
119 | ||
120 | /* | |
121 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 122 | * |
1c8d13c8 TD |
123 | * On success, returns the number of bytes sent (>=0) |
124 | * On error, returns -1 | |
fac6795d | 125 | */ |
cd80958d | 126 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
127 | { |
128 | int ret; | |
129 | ||
130 | if (!connected) { | |
2f70b271 | 131 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 132 | goto end; |
fac6795d DG |
133 | } |
134 | ||
a4b92340 DG |
135 | DBG("LSM cmd type : %d", lsm->cmd_type); |
136 | ||
be040666 | 137 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 138 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
139 | if (ret < 0) { |
140 | ret = -LTTNG_ERR_FATAL; | |
141 | } | |
e065084a DG |
142 | |
143 | end: | |
144 | return ret; | |
145 | } | |
146 | ||
53a80697 MD |
147 | /* |
148 | * Send var len data to the session daemon. | |
149 | * | |
150 | * On success, returns the number of bytes sent (>=0) | |
151 | * On error, returns -1 | |
152 | */ | |
c2d69327 | 153 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
154 | { |
155 | int ret; | |
156 | ||
157 | if (!connected) { | |
2f70b271 | 158 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
159 | goto end; |
160 | } | |
a4b92340 | 161 | |
53a80697 MD |
162 | if (!data || !len) { |
163 | ret = 0; | |
164 | goto end; | |
165 | } | |
166 | ||
167 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
168 | if (ret < 0) { |
169 | ret = -LTTNG_ERR_FATAL; | |
170 | } | |
53a80697 MD |
171 | |
172 | end: | |
173 | return ret; | |
174 | } | |
175 | ||
e065084a | 176 | /* |
cd80958d | 177 | * Receive data from the sessiond socket. |
e065084a | 178 | * |
1c8d13c8 TD |
179 | * On success, returns the number of bytes received (>=0) |
180 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 181 | */ |
ca95a216 | 182 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
183 | { |
184 | int ret; | |
185 | ||
186 | if (!connected) { | |
2f70b271 | 187 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 188 | goto end; |
fac6795d DG |
189 | } |
190 | ||
ca95a216 | 191 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
192 | if (ret < 0) { |
193 | ret = -LTTNG_ERR_FATAL; | |
194 | } | |
fac6795d | 195 | |
e065084a | 196 | end: |
fac6795d DG |
197 | return ret; |
198 | } | |
199 | ||
200 | /* | |
9ae110e2 | 201 | * Check if we are in the specified group. |
65beb5ff | 202 | * |
9ae110e2 | 203 | * If yes return 1, else return -1. |
947308c4 | 204 | */ |
6c71277b MD |
205 | LTTNG_HIDDEN |
206 | int lttng_check_tracing_group(void) | |
947308c4 DG |
207 | { |
208 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
209 | gid_t *grp_list; | |
210 | int grp_list_size, grp_id, i; | |
211 | int ret = -1; | |
6c71277b | 212 | const char *grp_name = tracing_group; |
947308c4 DG |
213 | |
214 | /* Get GID of group 'tracing' */ | |
215 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
216 | if (!grp_tracing) { |
217 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
218 | goto end; |
219 | } | |
220 | ||
221 | /* Get number of supplementary group IDs */ | |
222 | grp_list_size = getgroups(0, NULL); | |
223 | if (grp_list_size < 0) { | |
6f04ed72 | 224 | PERROR("getgroups"); |
947308c4 DG |
225 | goto end; |
226 | } | |
227 | ||
228 | /* Alloc group list of the right size */ | |
3f451dc0 | 229 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 230 | if (!grp_list) { |
6f04ed72 | 231 | PERROR("malloc"); |
00795392 MD |
232 | goto end; |
233 | } | |
947308c4 | 234 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 235 | if (grp_id < 0) { |
6f04ed72 | 236 | PERROR("getgroups"); |
947308c4 DG |
237 | goto free_list; |
238 | } | |
239 | ||
240 | for (i = 0; i < grp_list_size; i++) { | |
241 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 242 | ret = 1; |
947308c4 DG |
243 | break; |
244 | } | |
245 | } | |
246 | ||
247 | free_list: | |
248 | free(grp_list); | |
249 | ||
250 | end: | |
251 | return ret; | |
252 | } | |
253 | ||
254 | /* | |
2269e89e DG |
255 | * Try connect to session daemon with sock_path. |
256 | * | |
257 | * Return 0 on success, else -1 | |
258 | */ | |
259 | static int try_connect_sessiond(const char *sock_path) | |
260 | { | |
261 | int ret; | |
262 | ||
263 | /* If socket exist, we check if the daemon listens for connect. */ | |
264 | ret = access(sock_path, F_OK); | |
265 | if (ret < 0) { | |
266 | /* Not alive */ | |
2f70b271 | 267 | goto error; |
2269e89e DG |
268 | } |
269 | ||
270 | ret = lttcomm_connect_unix_sock(sock_path); | |
271 | if (ret < 0) { | |
9ae110e2 | 272 | /* Not alive. */ |
2f70b271 | 273 | goto error; |
2269e89e DG |
274 | } |
275 | ||
276 | ret = lttcomm_close_unix_sock(ret); | |
277 | if (ret < 0) { | |
6f04ed72 | 278 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
279 | } |
280 | ||
281 | return 0; | |
2f70b271 DG |
282 | |
283 | error: | |
284 | return -1; | |
2269e89e DG |
285 | } |
286 | ||
287 | /* | |
2f70b271 DG |
288 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
289 | * variable. | |
290 | * | |
291 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
292 | * is somehow too long or ENOMEM). | |
947308c4 DG |
293 | */ |
294 | static int set_session_daemon_path(void) | |
295 | { | |
9ae110e2 | 296 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
297 | uid_t uid; |
298 | ||
299 | uid = getuid(); | |
947308c4 | 300 | |
2269e89e DG |
301 | if (uid != 0) { |
302 | /* Are we in the tracing group ? */ | |
6c71277b | 303 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
304 | } |
305 | ||
08a9c49f | 306 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
307 | lttng_ctl_copy_string(sessiond_sock_path, |
308 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 309 | } |
2269e89e | 310 | |
08a9c49f | 311 | if (uid != 0) { |
c617c0c6 MD |
312 | int ret; |
313 | ||
08a9c49f | 314 | if (in_tgroup) { |
9ae110e2 | 315 | /* Tracing group. */ |
08a9c49f TD |
316 | ret = try_connect_sessiond(sessiond_sock_path); |
317 | if (ret >= 0) { | |
318 | goto end; | |
2269e89e | 319 | } |
08a9c49f | 320 | /* Global session daemon not available... */ |
2269e89e | 321 | } |
08a9c49f TD |
322 | /* ...or not in tracing group (and not root), default */ |
323 | ||
324 | /* | |
9ae110e2 JG |
325 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
326 | * is too small; | |
327 | * With GNU C >= 2.1, snprintf returns the required size | |
328 | * (excluding closing null) | |
08a9c49f TD |
329 | */ |
330 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 331 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 332 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 333 | goto error; |
947308c4 | 334 | } |
947308c4 | 335 | } |
08a9c49f | 336 | end: |
947308c4 | 337 | return 0; |
2f70b271 DG |
338 | |
339 | error: | |
340 | return -1; | |
947308c4 DG |
341 | } |
342 | ||
65beb5ff | 343 | /* |
9ae110e2 | 344 | * Connect to the LTTng session daemon. |
65beb5ff | 345 | * |
9ae110e2 | 346 | * On success, return 0. On error, return -1. |
65beb5ff DG |
347 | */ |
348 | static int connect_sessiond(void) | |
349 | { | |
350 | int ret; | |
351 | ||
da3c9ec1 DG |
352 | /* Don't try to connect if already connected. */ |
353 | if (connected) { | |
354 | return 0; | |
355 | } | |
356 | ||
65beb5ff DG |
357 | ret = set_session_daemon_path(); |
358 | if (ret < 0) { | |
2f70b271 | 359 | goto error; |
65beb5ff DG |
360 | } |
361 | ||
9ae110e2 | 362 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
363 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
364 | if (ret < 0) { | |
2f70b271 | 365 | goto error; |
65beb5ff DG |
366 | } |
367 | ||
368 | sessiond_socket = ret; | |
369 | connected = 1; | |
370 | ||
371 | return 0; | |
2f70b271 DG |
372 | |
373 | error: | |
374 | return -1; | |
65beb5ff DG |
375 | } |
376 | ||
377 | /* | |
1c8d13c8 | 378 | * Clean disconnect from the session daemon. |
9ae110e2 | 379 | * |
1c8d13c8 | 380 | * On success, return 0. On error, return -1. |
65beb5ff DG |
381 | */ |
382 | static int disconnect_sessiond(void) | |
383 | { | |
384 | int ret = 0; | |
385 | ||
386 | if (connected) { | |
387 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
388 | sessiond_socket = 0; | |
389 | connected = 0; | |
390 | } | |
391 | ||
392 | return ret; | |
393 | } | |
394 | ||
795a978d PP |
395 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
396 | size_t *user_len) | |
397 | { | |
398 | int ret = 0; | |
399 | void *buf = NULL; | |
400 | ||
401 | if (len) { | |
402 | if (!user_len) { | |
403 | ret = -LTTNG_ERR_INVALID; | |
404 | goto end; | |
405 | } | |
406 | ||
407 | buf = zmalloc(len); | |
408 | if (!buf) { | |
409 | ret = -ENOMEM; | |
410 | goto end; | |
411 | } | |
412 | ||
413 | ret = recv_data_sessiond(buf, len); | |
414 | if (ret < 0) { | |
415 | goto end; | |
416 | } | |
417 | ||
418 | if (!user_buf) { | |
419 | ret = -LTTNG_ERR_INVALID; | |
420 | goto end; | |
421 | } | |
422 | ||
423 | /* Move ownership of command header buffer to user. */ | |
424 | *user_buf = buf; | |
425 | buf = NULL; | |
426 | *user_len = len; | |
427 | } else { | |
428 | /* No command header. */ | |
429 | if (user_len) { | |
430 | *user_len = 0; | |
431 | } | |
432 | ||
433 | if (user_buf) { | |
434 | *user_buf = NULL; | |
435 | } | |
436 | } | |
437 | ||
438 | end: | |
439 | free(buf); | |
440 | return ret; | |
441 | } | |
442 | ||
35a6fdb7 | 443 | /* |
cd80958d | 444 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 445 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 446 | * |
af87c45a | 447 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 448 | */ |
cac3069d DG |
449 | LTTNG_HIDDEN |
450 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
795a978d PP |
451 | const void *vardata, size_t vardata_len, |
452 | void **user_payload_buf, void **user_cmd_header_buf, | |
453 | size_t *user_cmd_header_len) | |
65beb5ff DG |
454 | { |
455 | int ret; | |
795a978d | 456 | size_t payload_len; |
cd80958d | 457 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
458 | |
459 | ret = connect_sessiond(); | |
460 | if (ret < 0) { | |
2f70b271 | 461 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
462 | goto end; |
463 | } | |
464 | ||
65beb5ff | 465 | /* Send command to session daemon */ |
cd80958d | 466 | ret = send_session_msg(lsm); |
65beb5ff | 467 | if (ret < 0) { |
2f70b271 | 468 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
469 | goto end; |
470 | } | |
53a80697 | 471 | /* Send var len data */ |
795a978d | 472 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 473 | if (ret < 0) { |
2f70b271 | 474 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
475 | goto end; |
476 | } | |
65beb5ff DG |
477 | |
478 | /* Get header from data transmission */ | |
479 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
480 | if (ret < 0) { | |
2f70b271 | 481 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
482 | goto end; |
483 | } | |
484 | ||
485 | /* Check error code if OK */ | |
f73fabfd | 486 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
487 | ret = -llm.ret_code; |
488 | goto end; | |
489 | } | |
490 | ||
795a978d PP |
491 | /* Get command header from data transmission */ |
492 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
493 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 494 | if (ret < 0) { |
65beb5ff DG |
495 | goto end; |
496 | } | |
497 | ||
795a978d PP |
498 | /* Get payload from data transmission */ |
499 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
500 | &payload_len); | |
501 | if (ret < 0) { | |
83009e5e DG |
502 | goto end; |
503 | } | |
504 | ||
795a978d | 505 | ret = llm.data_size; |
65beb5ff DG |
506 | |
507 | end: | |
508 | disconnect_sessiond(); | |
509 | return ret; | |
510 | } | |
511 | ||
9f19cc17 | 512 | /* |
cd80958d | 513 | * Create lttng handle and return pointer. |
9ae110e2 | 514 | * |
1c8d13c8 | 515 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 516 | */ |
cd80958d DG |
517 | struct lttng_handle *lttng_create_handle(const char *session_name, |
518 | struct lttng_domain *domain) | |
9f19cc17 | 519 | { |
2f70b271 DG |
520 | struct lttng_handle *handle = NULL; |
521 | ||
522 | if (domain == NULL) { | |
523 | goto end; | |
524 | } | |
cd80958d | 525 | |
3f451dc0 | 526 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 527 | if (handle == NULL) { |
2f70b271 | 528 | PERROR("malloc handle"); |
cd80958d DG |
529 | goto end; |
530 | } | |
531 | ||
532 | /* Copy session name */ | |
cac3069d | 533 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
534 | sizeof(handle->session_name)); |
535 | ||
536 | /* Copy lttng domain */ | |
cac3069d | 537 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); |
cd80958d DG |
538 | |
539 | end: | |
540 | return handle; | |
541 | } | |
542 | ||
543 | /* | |
544 | * Destroy handle by free(3) the pointer. | |
545 | */ | |
546 | void lttng_destroy_handle(struct lttng_handle *handle) | |
547 | { | |
0e428499 | 548 | free(handle); |
eb354453 DG |
549 | } |
550 | ||
d9800920 DG |
551 | /* |
552 | * Register an outside consumer. | |
9ae110e2 | 553 | * |
1c8d13c8 | 554 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
555 | */ |
556 | int lttng_register_consumer(struct lttng_handle *handle, | |
557 | const char *socket_path) | |
558 | { | |
559 | struct lttcomm_session_msg lsm; | |
560 | ||
2f70b271 DG |
561 | if (handle == NULL || socket_path == NULL) { |
562 | return -LTTNG_ERR_INVALID; | |
563 | } | |
564 | ||
53efb85a | 565 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 566 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 567 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 568 | sizeof(lsm.session.name)); |
cac3069d | 569 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 570 | |
9ae110e2 JG |
571 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
572 | sizeof(lsm.u.reg.path)); | |
d9800920 | 573 | |
cac3069d | 574 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
575 | } |
576 | ||
1df4dedd | 577 | /* |
9ae110e2 JG |
578 | * Start tracing for all traces of the session. |
579 | * | |
580 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 581 | */ |
6a4f824d | 582 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 583 | { |
cd80958d DG |
584 | struct lttcomm_session_msg lsm; |
585 | ||
6a4f824d | 586 | if (session_name == NULL) { |
2f70b271 | 587 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
588 | } |
589 | ||
53efb85a | 590 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 591 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 592 | |
cac3069d DG |
593 | lttng_ctl_copy_string(lsm.session.name, session_name, |
594 | sizeof(lsm.session.name)); | |
cd80958d | 595 | |
cac3069d | 596 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 597 | } |
1df4dedd DG |
598 | |
599 | /* | |
38ee087f | 600 | * Stop tracing for all traces of the session. |
f3ed775e | 601 | */ |
38ee087f | 602 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 603 | { |
38ee087f | 604 | int ret, data_ret; |
cd80958d DG |
605 | struct lttcomm_session_msg lsm; |
606 | ||
6a4f824d | 607 | if (session_name == NULL) { |
2f70b271 | 608 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
609 | } |
610 | ||
53efb85a | 611 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 612 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 613 | |
cac3069d DG |
614 | lttng_ctl_copy_string(lsm.session.name, session_name, |
615 | sizeof(lsm.session.name)); | |
cd80958d | 616 | |
cac3069d | 617 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
618 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
619 | goto error; | |
620 | } | |
621 | ||
622 | if (!wait) { | |
623 | goto end; | |
624 | } | |
625 | ||
38ee087f DG |
626 | /* Check for data availability */ |
627 | do { | |
6d805429 | 628 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
629 | if (data_ret < 0) { |
630 | /* Return the data available call error. */ | |
631 | ret = data_ret; | |
632 | goto error; | |
633 | } | |
634 | ||
635 | /* | |
9ae110e2 JG |
636 | * Data sleep time before retrying (in usec). Don't sleep if the |
637 | * call returned value indicates availability. | |
38ee087f | 638 | */ |
6d805429 | 639 | if (data_ret) { |
38ee087f | 640 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 641 | } |
6d805429 | 642 | } while (data_ret != 0); |
38ee087f | 643 | |
38ee087f DG |
644 | end: |
645 | error: | |
646 | return ret; | |
647 | } | |
648 | ||
649 | /* | |
650 | * Stop tracing and wait for data availability. | |
651 | */ | |
652 | int lttng_stop_tracing(const char *session_name) | |
653 | { | |
654 | return _lttng_stop_tracing(session_name, 1); | |
655 | } | |
656 | ||
657 | /* | |
658 | * Stop tracing but _don't_ wait for data availability. | |
659 | */ | |
660 | int lttng_stop_tracing_no_wait(const char *session_name) | |
661 | { | |
662 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
663 | } |
664 | ||
665 | /* | |
601d5acf DG |
666 | * Add context to a channel. |
667 | * | |
668 | * If the given channel is NULL, add the contexts to all channels. | |
669 | * The event_name param is ignored. | |
af87c45a DG |
670 | * |
671 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 672 | */ |
cd80958d | 673 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
674 | struct lttng_event_context *ctx, const char *event_name, |
675 | const char *channel_name) | |
d65106b1 | 676 | { |
2001793c JG |
677 | int ret; |
678 | size_t len = 0; | |
679 | char *buf = NULL; | |
cd80958d DG |
680 | struct lttcomm_session_msg lsm; |
681 | ||
9ae110e2 | 682 | /* Safety check. Both are mandatory. */ |
9d697d3d | 683 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
684 | ret = -LTTNG_ERR_INVALID; |
685 | goto end; | |
cd80958d DG |
686 | } |
687 | ||
441c16a7 | 688 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
689 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
690 | ||
85076754 MD |
691 | /* If no channel name, send empty string. */ |
692 | if (channel_name == NULL) { | |
693 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
694 | sizeof(lsm.u.context.channel_name)); | |
695 | } else { | |
696 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
697 | sizeof(lsm.u.context.channel_name)); | |
698 | } | |
cd80958d | 699 | |
cac3069d | 700 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cac3069d | 701 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
702 | sizeof(lsm.session.name)); |
703 | ||
2001793c JG |
704 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
705 | size_t provider_len, ctx_len; | |
706 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
707 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
708 | ||
709 | if (!provider_name || !ctx_name) { | |
710 | ret = -LTTNG_ERR_INVALID; | |
711 | goto end; | |
712 | } | |
713 | ||
714 | provider_len = strlen(provider_name); | |
715 | if (provider_len == 0) { | |
716 | ret = -LTTNG_ERR_INVALID; | |
717 | goto end; | |
718 | } | |
719 | lsm.u.context.provider_name_len = provider_len; | |
720 | ||
721 | ctx_len = strlen(ctx_name); | |
722 | if (ctx_len == 0) { | |
723 | ret = -LTTNG_ERR_INVALID; | |
724 | goto end; | |
725 | } | |
726 | lsm.u.context.context_name_len = ctx_len; | |
727 | ||
728 | len = provider_len + ctx_len; | |
729 | buf = zmalloc(len); | |
730 | if (!buf) { | |
731 | ret = -LTTNG_ERR_NOMEM; | |
732 | goto end; | |
733 | } | |
734 | ||
735 | memcpy(buf, provider_name, provider_len); | |
736 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
737 | } | |
738 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
739 | /* Don't leak application addresses to the sessiond. */ | |
740 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
741 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
742 | ||
795a978d | 743 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
744 | end: |
745 | free(buf); | |
746 | return ret; | |
d65106b1 DG |
747 | } |
748 | ||
f3ed775e | 749 | /* |
9ae110e2 JG |
750 | * Enable event(s) for a channel. |
751 | * | |
752 | * If no event name is specified, all events are enabled. | |
753 | * If no channel name is specified, the default 'channel0' is used. | |
754 | * | |
755 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 756 | */ |
cd80958d | 757 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 758 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 759 | { |
f8a96544 JI |
760 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
761 | NULL, 0, NULL); | |
1df4dedd DG |
762 | } |
763 | ||
53a80697 | 764 | /* |
025faf73 | 765 | * Create or enable an event with a filter expression. |
178191b3 | 766 | * |
53a80697 MD |
767 | * Return negative error value on error. |
768 | * Return size of returned session payload data if OK. | |
769 | */ | |
025faf73 | 770 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 771 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
772 | const char *filter_expression) |
773 | { | |
f8a96544 JI |
774 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
775 | filter_expression, 0, NULL); | |
53a80697 MD |
776 | } |
777 | ||
347c5ab5 | 778 | /* |
0e115563 | 779 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
780 | * NULL if not applicable. |
781 | * | |
782 | * An event with NO loglevel and the name is * will return NULL. | |
783 | */ | |
0e115563 | 784 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
785 | { |
786 | int err; | |
0e115563 | 787 | char *agent_filter = NULL; |
347c5ab5 DG |
788 | |
789 | assert(ev); | |
790 | ||
791 | /* Don't add filter for the '*' event. */ | |
792 | if (ev->name[0] != '*') { | |
793 | if (filter) { | |
0e115563 | 794 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
795 | ev->name); |
796 | } else { | |
0e115563 | 797 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
798 | } |
799 | if (err < 0) { | |
800 | PERROR("asprintf"); | |
6a556f7b | 801 | goto error; |
347c5ab5 DG |
802 | } |
803 | } | |
804 | ||
805 | /* Add loglevel filtering if any for the JUL domain. */ | |
806 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
807 | char *op; | |
808 | ||
809 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
810 | op = ">="; | |
811 | } else { | |
812 | op = "=="; | |
813 | } | |
814 | ||
0e115563 | 815 | if (filter || agent_filter) { |
6a556f7b JG |
816 | char *new_filter; |
817 | ||
fb0edb23 | 818 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 819 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 820 | ev->loglevel); |
0e115563 DG |
821 | if (agent_filter) { |
822 | free(agent_filter); | |
6a556f7b | 823 | } |
0e115563 | 824 | agent_filter = new_filter; |
347c5ab5 | 825 | } else { |
0e115563 | 826 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
827 | ev->loglevel); |
828 | } | |
829 | if (err < 0) { | |
830 | PERROR("asprintf"); | |
6a556f7b | 831 | goto error; |
347c5ab5 DG |
832 | } |
833 | } | |
834 | ||
0e115563 | 835 | return agent_filter; |
6a556f7b | 836 | error: |
0e115563 | 837 | free(agent_filter); |
6a556f7b | 838 | return NULL; |
347c5ab5 DG |
839 | } |
840 | ||
137b9942 | 841 | /* |
ec166985 | 842 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
843 | * newly allocated parser context in ctxp and populate the lsm object with the |
844 | * expression len. | |
845 | * | |
846 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
847 | */ | |
848 | static int generate_filter(char *filter_expression, | |
849 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
850 | { | |
851 | int ret; | |
852 | struct filter_parser_ctx *ctx = NULL; | |
853 | FILE *fmem = NULL; | |
854 | ||
855 | assert(filter_expression); | |
856 | assert(lsm); | |
857 | assert(ctxp); | |
858 | ||
859 | /* | |
860 | * Casting const to non-const, as the underlying function will use it in | |
861 | * read-only mode. | |
862 | */ | |
863 | fmem = lttng_fmemopen((void *) filter_expression, | |
864 | strlen(filter_expression), "r"); | |
865 | if (!fmem) { | |
866 | fprintf(stderr, "Error opening memory as stream\n"); | |
867 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
868 | goto error; | |
869 | } | |
870 | ctx = filter_parser_ctx_alloc(fmem); | |
871 | if (!ctx) { | |
872 | fprintf(stderr, "Error allocating parser\n"); | |
873 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
874 | goto filter_alloc_error; | |
875 | } | |
876 | ret = filter_parser_ctx_append_ast(ctx); | |
877 | if (ret) { | |
878 | fprintf(stderr, "Parse error\n"); | |
879 | ret = -LTTNG_ERR_FILTER_INVAL; | |
880 | goto parse_error; | |
881 | } | |
882 | ret = filter_visitor_set_parent(ctx); | |
883 | if (ret) { | |
884 | fprintf(stderr, "Set parent error\n"); | |
885 | ret = -LTTNG_ERR_FILTER_INVAL; | |
886 | goto parse_error; | |
887 | } | |
888 | if (print_xml) { | |
889 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
890 | if (ret) { | |
891 | fflush(stdout); | |
892 | fprintf(stderr, "XML print error\n"); | |
893 | ret = -LTTNG_ERR_FILTER_INVAL; | |
894 | goto parse_error; | |
895 | } | |
896 | } | |
897 | ||
898 | dbg_printf("Generating IR... "); | |
899 | fflush(stdout); | |
900 | ret = filter_visitor_ir_generate(ctx); | |
901 | if (ret) { | |
902 | fprintf(stderr, "Generate IR error\n"); | |
903 | ret = -LTTNG_ERR_FILTER_INVAL; | |
904 | goto parse_error; | |
905 | } | |
906 | dbg_printf("done\n"); | |
907 | ||
908 | dbg_printf("Validating IR... "); | |
909 | fflush(stdout); | |
910 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
911 | if (ret) { | |
912 | ret = -LTTNG_ERR_FILTER_INVAL; | |
913 | goto parse_error; | |
914 | } | |
9ae110e2 | 915 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
916 | ret = filter_visitor_ir_validate_string(ctx); |
917 | if (ret) { | |
918 | ret = -LTTNG_ERR_FILTER_INVAL; | |
919 | goto parse_error; | |
920 | } | |
137b9942 DG |
921 | dbg_printf("done\n"); |
922 | ||
923 | dbg_printf("Generating bytecode... "); | |
924 | fflush(stdout); | |
925 | ret = filter_visitor_bytecode_generate(ctx); | |
926 | if (ret) { | |
927 | fprintf(stderr, "Generate bytecode error\n"); | |
928 | ret = -LTTNG_ERR_FILTER_INVAL; | |
929 | goto parse_error; | |
930 | } | |
931 | dbg_printf("done\n"); | |
932 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
933 | bytecode_get_len(&ctx->bytecode->b)); | |
934 | ||
935 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
936 | + bytecode_get_len(&ctx->bytecode->b); | |
937 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
938 | ||
939 | /* No need to keep the memory stream. */ | |
940 | if (fclose(fmem) != 0) { | |
6f04ed72 | 941 | PERROR("fclose"); |
137b9942 DG |
942 | } |
943 | ||
944 | *ctxp = ctx; | |
945 | return 0; | |
946 | ||
947 | parse_error: | |
137b9942 DG |
948 | filter_ir_free(ctx); |
949 | filter_parser_ctx_free(ctx); | |
950 | filter_alloc_error: | |
951 | if (fclose(fmem) != 0) { | |
6f04ed72 | 952 | PERROR("fclose"); |
137b9942 DG |
953 | } |
954 | error: | |
955 | return ret; | |
956 | } | |
957 | ||
93deb080 JI |
958 | /* |
959 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
960 | * If no event name is specified, all events are enabled. | |
961 | * If no channel name is specified, the default name is used. | |
962 | * If filter expression is not NULL, the filter is set for the event. | |
963 | * If exclusion count is not zero, the exclusions are set for the event. | |
964 | * Returns size of returned session payload data or a negative error code. | |
965 | */ | |
966 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
967 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 968 | const char *original_filter_expression, |
93deb080 JI |
969 | int exclusion_count, char **exclusion_list) |
970 | { | |
971 | struct lttcomm_session_msg lsm; | |
64226865 | 972 | char *varlen_data; |
93deb080 | 973 | int ret = 0; |
137b9942 | 974 | unsigned int free_filter_expression = 0; |
93deb080 | 975 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
976 | /* |
977 | * Cast as non-const since we may replace the filter expression | |
978 | * by a dynamically allocated string. Otherwise, the original | |
979 | * string is not modified. | |
980 | */ | |
981 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
982 | |
983 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
984 | ret = -LTTNG_ERR_INVALID; |
985 | goto error; | |
93deb080 JI |
986 | } |
987 | ||
9ae110e2 JG |
988 | /* |
989 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
990 | * anyway, so treat this corner-case early to eliminate |
991 | * lttng_fmemopen error for 0-byte allocation. | |
992 | */ | |
993 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
994 | ret = -LTTNG_ERR_INVALID; |
995 | goto error; | |
93deb080 JI |
996 | } |
997 | ||
998 | memset(&lsm, 0, sizeof(lsm)); | |
999 | ||
1000 | /* If no channel name, send empty string. */ | |
1001 | if (channel_name == NULL) { | |
1002 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1003 | sizeof(lsm.u.enable.channel_name)); | |
1004 | } else { | |
1005 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1006 | sizeof(lsm.u.enable.channel_name)); | |
1007 | } | |
1008 | ||
18a720cd MD |
1009 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1010 | if (ev->name[0] == '\0') { | |
1011 | /* Enable all events */ | |
1012 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1013 | } |
93deb080 | 1014 | |
6565421f | 1015 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1016 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1017 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1018 | ||
1019 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1020 | sizeof(lsm.session.name)); | |
1021 | lsm.u.enable.exclusion_count = exclusion_count; | |
1022 | lsm.u.enable.bytecode_len = 0; | |
1023 | ||
9b21e6d5 DG |
1024 | /* |
1025 | * For the JUL domain, a filter is enforced except for the enable all | |
1026 | * event. This is done to avoid having the event in all sessions thus | |
1027 | * filtering by logger name. | |
1028 | */ | |
1029 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 | 1030 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
0e115563 DG |
1031 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1032 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
3e1c9ff7 | 1033 | goto ask_sessiond; |
93deb080 JI |
1034 | } |
1035 | ||
1036 | /* | |
1037 | * We have either a filter or some exclusions, so we need to set up | |
9ae110e2 | 1038 | * a variable-length memory block from where to send the data. |
93deb080 JI |
1039 | */ |
1040 | ||
9ae110e2 | 1041 | /* Parse filter expression. */ |
5cdb6027 | 1042 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1043 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1044 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1045 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1046 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1047 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1048 | char *agent_filter; | |
64226865 | 1049 | |
347c5ab5 | 1050 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1051 | agent_filter = set_agent_filter(filter_expression, ev); |
1052 | if (!agent_filter) { | |
137b9942 | 1053 | if (!filter_expression) { |
9ae110e2 JG |
1054 | /* |
1055 | * No JUL and no filter, just skip | |
1056 | * everything below. | |
1057 | */ | |
137b9942 DG |
1058 | goto ask_sessiond; |
1059 | } | |
64226865 DG |
1060 | } else { |
1061 | /* | |
9ae110e2 JG |
1062 | * With an agent filter, the original filter has |
1063 | * been added to it thus replace the filter | |
1064 | * expression. | |
64226865 | 1065 | */ |
0e115563 | 1066 | filter_expression = agent_filter; |
e9efbcd3 | 1067 | free_filter_expression = 1; |
9b21e6d5 | 1068 | } |
9b21e6d5 | 1069 | } |
93deb080 | 1070 | |
137b9942 | 1071 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1072 | if (ret) { |
137b9942 | 1073 | goto filter_error; |
93deb080 | 1074 | } |
6b453b5e JG |
1075 | } |
1076 | ||
1077 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
1078 | + lsm.u.enable.expression_len |
1079 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
1080 | if (!varlen_data) { |
1081 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 1082 | goto mem_error; |
6b453b5e | 1083 | } |
137b9942 | 1084 | |
9ae110e2 | 1085 | /* Put exclusion names first in the data. */ |
6b453b5e JG |
1086 | while (exclusion_count--) { |
1087 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
0c82ac62 PP |
1088 | *(exclusion_list + exclusion_count), |
1089 | LTTNG_SYMBOL_NAME_LEN - 1); | |
6b453b5e | 1090 | } |
9ae110e2 | 1091 | /* Add filter expression next. */ |
6b453b5e JG |
1092 | if (lsm.u.enable.expression_len != 0) { |
1093 | memcpy(varlen_data | |
1094 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1095 | filter_expression, | |
1096 | lsm.u.enable.expression_len); | |
1097 | } | |
9ae110e2 | 1098 | /* Add filter bytecode next. */ |
137b9942 | 1099 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1100 | memcpy(varlen_data |
1101 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1102 | + lsm.u.enable.expression_len, | |
1103 | &ctx->bytecode->b, | |
1104 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1105 | } |
1106 | ||
795a978d | 1107 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
67676bd8 | 1108 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
9ae110e2 JG |
1109 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, |
1110 | NULL); | |
6b453b5e | 1111 | free(varlen_data); |
93deb080 | 1112 | |
7ca1dc6f DG |
1113 | mem_error: |
1114 | if (filter_expression && ctx) { | |
93deb080 JI |
1115 | filter_bytecode_free(ctx); |
1116 | filter_ir_free(ctx); | |
1117 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1118 | } |
1119 | filter_error: | |
1120 | if (free_filter_expression) { | |
1121 | /* | |
9ae110e2 JG |
1122 | * The filter expression has been replaced and must be freed as |
1123 | * it is not the original filter expression received as a | |
1124 | * parameter. | |
7ca1dc6f DG |
1125 | */ |
1126 | free(filter_expression); | |
93deb080 | 1127 | } |
137b9942 DG |
1128 | error: |
1129 | /* | |
9ae110e2 JG |
1130 | * Return directly to the caller and don't ask the sessiond since |
1131 | * something went wrong in the parsing of data above. | |
137b9942 | 1132 | */ |
93deb080 | 1133 | return ret; |
3e1c9ff7 DG |
1134 | |
1135 | ask_sessiond: | |
1136 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1137 | return ret; | |
93deb080 JI |
1138 | } |
1139 | ||
6e911cad MD |
1140 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1141 | struct lttng_event *ev, const char *channel_name, | |
1142 | const char *original_filter_expression) | |
1df4dedd | 1143 | { |
cd80958d | 1144 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1145 | char *varlen_data; |
1146 | int ret = 0; | |
1147 | unsigned int free_filter_expression = 0; | |
1148 | struct filter_parser_ctx *ctx = NULL; | |
1149 | /* | |
1150 | * Cast as non-const since we may replace the filter expression | |
1151 | * by a dynamically allocated string. Otherwise, the original | |
1152 | * string is not modified. | |
1153 | */ | |
1154 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1155 | |
6e911cad MD |
1156 | if (handle == NULL || ev == NULL) { |
1157 | ret = -LTTNG_ERR_INVALID; | |
1158 | goto error; | |
1159 | } | |
1160 | ||
9ae110e2 JG |
1161 | /* |
1162 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1163 | * anyway, so treat this corner-case early to eliminate |
1164 | * lttng_fmemopen error for 0-byte allocation. | |
1165 | */ | |
1166 | if (filter_expression && filter_expression[0] == '\0') { | |
1167 | ret = -LTTNG_ERR_INVALID; | |
1168 | goto error; | |
cd80958d DG |
1169 | } |
1170 | ||
441c16a7 MD |
1171 | memset(&lsm, 0, sizeof(lsm)); |
1172 | ||
85076754 MD |
1173 | /* If no channel name, send empty string. */ |
1174 | if (channel_name == NULL) { | |
1175 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1176 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1177 | } else { |
85076754 | 1178 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1179 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1180 | } |
1181 | ||
18a720cd | 1182 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1183 | |
6e911cad MD |
1184 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1185 | /* FIXME: copying non-packed struct to packed struct. */ | |
1186 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1187 | ||
cac3069d | 1188 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1189 | sizeof(lsm.session.name)); |
6e911cad | 1190 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1191 | |
6e911cad MD |
1192 | /* |
1193 | * For the JUL domain, a filter is enforced except for the | |
1194 | * disable all event. This is done to avoid having the event in | |
1195 | * all sessions thus filtering by logger name. | |
1196 | */ | |
1197 | if (filter_expression == NULL && | |
1198 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1199 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1200 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1201 | goto ask_sessiond; |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * We have a filter, so we need to set up a variable-length | |
1206 | * memory block from where to send the data. | |
1207 | */ | |
1208 | ||
1209 | /* Parse filter expression */ | |
1210 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1211 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1212 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1213 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1214 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1215 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1216 | char *agent_filter; | |
6e911cad MD |
1217 | |
1218 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1219 | agent_filter = set_agent_filter(filter_expression, ev); |
1220 | if (!agent_filter) { | |
6e911cad | 1221 | if (!filter_expression) { |
9ae110e2 JG |
1222 | /* |
1223 | * No JUL and no filter, just skip | |
1224 | * everything below. | |
1225 | */ | |
6e911cad MD |
1226 | goto ask_sessiond; |
1227 | } | |
1228 | } else { | |
1229 | /* | |
9ae110e2 JG |
1230 | * With a JUL filter, the original filter has |
1231 | * been added to it thus replace the filter | |
1232 | * expression. | |
6e911cad | 1233 | */ |
0e115563 | 1234 | filter_expression = agent_filter; |
6e911cad MD |
1235 | free_filter_expression = 1; |
1236 | } | |
1237 | } | |
1238 | ||
1239 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1240 | if (ret) { | |
1241 | goto filter_error; | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1246 | + lsm.u.disable.expression_len); | |
1247 | if (!varlen_data) { | |
1248 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1249 | goto mem_error; | |
1250 | } | |
1251 | ||
9ae110e2 | 1252 | /* Add filter expression. */ |
6e911cad MD |
1253 | if (lsm.u.disable.expression_len != 0) { |
1254 | memcpy(varlen_data, | |
1255 | filter_expression, | |
1256 | lsm.u.disable.expression_len); | |
1257 | } | |
9ae110e2 | 1258 | /* Add filter bytecode next. */ |
6e911cad MD |
1259 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1260 | memcpy(varlen_data | |
1261 | + lsm.u.disable.expression_len, | |
1262 | &ctx->bytecode->b, | |
1263 | lsm.u.disable.bytecode_len); | |
1264 | } | |
1265 | ||
795a978d | 1266 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1267 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1268 | free(varlen_data); | |
1269 | ||
1270 | mem_error: | |
1271 | if (filter_expression && ctx) { | |
1272 | filter_bytecode_free(ctx); | |
1273 | filter_ir_free(ctx); | |
1274 | filter_parser_ctx_free(ctx); | |
1275 | } | |
1276 | filter_error: | |
1277 | if (free_filter_expression) { | |
1278 | /* | |
9ae110e2 JG |
1279 | * The filter expression has been replaced and must be freed as |
1280 | * it is not the original filter expression received as a | |
1281 | * parameter. | |
6e911cad MD |
1282 | */ |
1283 | free(filter_expression); | |
1284 | } | |
1285 | error: | |
1286 | /* | |
9ae110e2 JG |
1287 | * Return directly to the caller and don't ask the sessiond since |
1288 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1289 | */ |
1290 | return ret; | |
1291 | ||
1292 | ask_sessiond: | |
1293 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1294 | return ret; | |
1295 | } | |
1296 | ||
1297 | /* | |
9ae110e2 JG |
1298 | * Disable event(s) of a channel and domain. |
1299 | * If no event name is specified, all events are disabled. | |
1300 | * If no channel name is specified, the default 'channel0' is used. | |
1301 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1302 | */ |
1303 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1304 | const char *channel_name) | |
1305 | { | |
1306 | struct lttng_event ev; | |
1307 | ||
1308 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1309 | ev.loglevel = -1; |
6e911cad MD |
1310 | ev.type = LTTNG_EVENT_ALL; |
1311 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1312 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1313 | } |
1314 | ||
1315 | /* | |
9ae110e2 JG |
1316 | * Enable channel per domain |
1317 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1318 | */ |
cd80958d | 1319 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 1320 | struct lttng_channel *chan) |
a5c5a2bd | 1321 | { |
cd80958d DG |
1322 | struct lttcomm_session_msg lsm; |
1323 | ||
9ae110e2 | 1324 | /* NULL arguments are forbidden. No default values. */ |
5117eeec | 1325 | if (handle == NULL || chan == NULL) { |
2f70b271 | 1326 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1327 | } |
1328 | ||
441c16a7 MD |
1329 | memset(&lsm, 0, sizeof(lsm)); |
1330 | ||
5117eeec | 1331 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 1332 | |
cd80958d DG |
1333 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
1334 | ||
cac3069d | 1335 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1336 | |
cac3069d | 1337 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1338 | sizeof(lsm.session.name)); |
1339 | ||
cac3069d | 1340 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1341 | } |
1df4dedd | 1342 | |
2ef84c95 | 1343 | /* |
9ae110e2 JG |
1344 | * All tracing will be stopped for registered events of the channel. |
1345 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1346 | */ |
cd80958d | 1347 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1348 | { |
cd80958d DG |
1349 | struct lttcomm_session_msg lsm; |
1350 | ||
9ae110e2 | 1351 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1352 | if (handle == NULL || name == NULL) { |
2f70b271 | 1353 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1354 | } |
1355 | ||
441c16a7 MD |
1356 | memset(&lsm, 0, sizeof(lsm)); |
1357 | ||
cd80958d | 1358 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1359 | |
cac3069d | 1360 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1361 | sizeof(lsm.u.disable.channel_name)); |
1362 | ||
cac3069d | 1363 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1364 | |
cac3069d | 1365 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1366 | sizeof(lsm.session.name)); |
1367 | ||
cac3069d | 1368 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1369 | } |
1370 | ||
ccf10263 | 1371 | /* |
9ae110e2 JG |
1372 | * Add PID to session tracker. |
1373 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1374 | */ |
1375 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1376 | { | |
1377 | struct lttcomm_session_msg lsm; | |
1378 | ||
9ae110e2 | 1379 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1380 | if (handle == NULL) { |
1381 | return -LTTNG_ERR_INVALID; | |
1382 | } | |
1383 | ||
1384 | memset(&lsm, 0, sizeof(lsm)); | |
1385 | ||
1386 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1387 | lsm.u.pid_tracker.pid = pid; | |
1388 | ||
1389 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1390 | ||
1391 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1392 | sizeof(lsm.session.name)); | |
1393 | ||
1394 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1395 | } | |
1396 | ||
1397 | /* | |
9ae110e2 JG |
1398 | * Remove PID from session tracker. |
1399 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1400 | */ |
1401 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1402 | { | |
1403 | struct lttcomm_session_msg lsm; | |
1404 | ||
9ae110e2 | 1405 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1406 | if (handle == NULL) { |
1407 | return -LTTNG_ERR_INVALID; | |
1408 | } | |
1409 | ||
1410 | memset(&lsm, 0, sizeof(lsm)); | |
1411 | ||
1412 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1413 | lsm.u.pid_tracker.pid = pid; | |
1414 | ||
1415 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1416 | ||
1417 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1418 | sizeof(lsm.session.name)); | |
1419 | ||
1420 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1421 | } | |
1422 | ||
fac6795d | 1423 | /* |
9ae110e2 JG |
1424 | * Lists all available tracepoints of domain. |
1425 | * Sets the contents of the events array. | |
1426 | * Returns the number of lttng_event entries in events; | |
1427 | * on error, returns a negative value. | |
fac6795d | 1428 | */ |
cd80958d | 1429 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1430 | struct lttng_event **events) |
fac6795d | 1431 | { |
052da939 | 1432 | int ret; |
cd80958d DG |
1433 | struct lttcomm_session_msg lsm; |
1434 | ||
9d697d3d | 1435 | if (handle == NULL) { |
2f70b271 | 1436 | return -LTTNG_ERR_INVALID; |
cd80958d | 1437 | } |
fac6795d | 1438 | |
53efb85a | 1439 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1440 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1441 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1442 | |
cac3069d | 1443 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1444 | if (ret < 0) { |
1445 | return ret; | |
eb354453 | 1446 | } |
fac6795d | 1447 | |
9f19cc17 | 1448 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1449 | } |
1450 | ||
f37d259d | 1451 | /* |
9ae110e2 JG |
1452 | * Lists all available tracepoint fields of domain. |
1453 | * Sets the contents of the event field array. | |
1454 | * Returns the number of lttng_event_field entries in events; | |
1455 | * on error, returns a negative value. | |
f37d259d MD |
1456 | */ |
1457 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1458 | struct lttng_event_field **fields) | |
1459 | { | |
1460 | int ret; | |
1461 | struct lttcomm_session_msg lsm; | |
1462 | ||
1463 | if (handle == NULL) { | |
2f70b271 | 1464 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1465 | } |
1466 | ||
53efb85a | 1467 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1468 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1469 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1470 | |
cac3069d | 1471 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1472 | if (ret < 0) { |
1473 | return ret; | |
1474 | } | |
1475 | ||
1476 | return ret / sizeof(struct lttng_event_field); | |
1477 | } | |
1478 | ||
834978fd | 1479 | /* |
9ae110e2 JG |
1480 | * Lists all available kernel system calls. Allocates and sets the contents of |
1481 | * the events array. | |
834978fd | 1482 | * |
9ae110e2 JG |
1483 | * Returns the number of lttng_event entries in events; on error, returns a |
1484 | * negative value. | |
834978fd DG |
1485 | */ |
1486 | int lttng_list_syscalls(struct lttng_event **events) | |
1487 | { | |
1488 | int ret; | |
1489 | struct lttcomm_session_msg lsm; | |
1490 | ||
1491 | if (!events) { | |
1492 | return -LTTNG_ERR_INVALID; | |
1493 | } | |
1494 | ||
1495 | memset(&lsm, 0, sizeof(lsm)); | |
1496 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1497 | /* Force kernel domain for system calls. */ | |
1498 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1499 | ||
1500 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1501 | if (ret < 0) { | |
1502 | return ret; | |
1503 | } | |
1504 | ||
1505 | return ret / sizeof(struct lttng_event); | |
1506 | } | |
1507 | ||
1657e9bb | 1508 | /* |
9ae110e2 JG |
1509 | * Returns a human readable string describing |
1510 | * the error code (a negative value). | |
1657e9bb | 1511 | */ |
9a745bc7 | 1512 | const char *lttng_strerror(int code) |
1657e9bb | 1513 | { |
f73fabfd | 1514 | return error_get_str(code); |
1657e9bb DG |
1515 | } |
1516 | ||
aaf97519 | 1517 | /* |
a4b92340 DG |
1518 | * Create a brand new session using name and url for destination. |
1519 | * | |
f73fabfd | 1520 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1521 | */ |
a4b92340 | 1522 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1523 | { |
3dd05a85 | 1524 | int ret; |
a4b92340 | 1525 | ssize_t size; |
00e2e675 | 1526 | struct lttcomm_session_msg lsm; |
a4b92340 | 1527 | struct lttng_uri *uris = NULL; |
00e2e675 | 1528 | |
a4b92340 | 1529 | if (name == NULL) { |
2f70b271 | 1530 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1531 | } |
1532 | ||
a4b92340 | 1533 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1534 | |
a4b92340 | 1535 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1536 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1537 | |
1538 | /* There should never be a data URL */ | |
bc894455 | 1539 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1540 | if (size < 0) { |
2f70b271 | 1541 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1542 | } |
1543 | ||
a4b92340 DG |
1544 | lsm.u.uri.size = size; |
1545 | ||
795a978d | 1546 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1547 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1548 | |
1549 | free(uris); | |
1550 | return ret; | |
00e2e675 DG |
1551 | } |
1552 | ||
8028d920 | 1553 | /* |
9ae110e2 JG |
1554 | * Destroy session using name. |
1555 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1556 | */ |
e20ee7c2 | 1557 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 1558 | { |
cd80958d DG |
1559 | struct lttcomm_session_msg lsm; |
1560 | ||
843f5df9 | 1561 | if (session_name == NULL) { |
2f70b271 | 1562 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1563 | } |
1564 | ||
53efb85a | 1565 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1566 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1567 | |
cac3069d DG |
1568 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1569 | sizeof(lsm.session.name)); | |
cd80958d | 1570 | |
cac3069d | 1571 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1572 | } |
1573 | ||
e20ee7c2 JD |
1574 | /* |
1575 | * Stop the session and wait for the data before destroying it | |
1576 | */ | |
1577 | int lttng_destroy_session(const char *session_name) | |
1578 | { | |
1579 | int ret; | |
1580 | ||
1581 | /* | |
1582 | * Stop the tracing and wait for the data. | |
1583 | */ | |
1584 | ret = _lttng_stop_tracing(session_name, 1); | |
1585 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1586 | goto end; | |
1587 | } | |
1588 | ||
1589 | ret = _lttng_destroy_session(session_name); | |
1590 | end: | |
1591 | return ret; | |
1592 | } | |
1593 | ||
1594 | /* | |
1595 | * Destroy the session without waiting for the data. | |
1596 | */ | |
1597 | int lttng_destroy_session_no_wait(const char *session_name) | |
1598 | { | |
1599 | int ret; | |
1600 | ||
1601 | /* | |
1602 | * Stop the tracing without waiting for the data. | |
1603 | * The session might already have been stopped, so just | |
1604 | * skip this error. | |
1605 | */ | |
1606 | ret = _lttng_stop_tracing(session_name, 0); | |
1607 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1608 | goto end; | |
1609 | } | |
1610 | ||
1611 | ret = _lttng_destroy_session(session_name); | |
1612 | end: | |
1613 | return ret; | |
1614 | } | |
1615 | ||
57167058 | 1616 | /* |
9ae110e2 JG |
1617 | * Ask the session daemon for all available sessions. |
1618 | * Sets the contents of the sessions array. | |
1619 | * Returns the number of lttng_session entries in sessions; | |
1620 | * on error, returns a negative value. | |
57167058 | 1621 | */ |
ca95a216 | 1622 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1623 | { |
ca95a216 | 1624 | int ret; |
cd80958d | 1625 | struct lttcomm_session_msg lsm; |
57167058 | 1626 | |
53efb85a | 1627 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1628 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1629 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1630 | if (ret < 0) { |
ca95a216 | 1631 | return ret; |
57167058 DG |
1632 | } |
1633 | ||
ca95a216 | 1634 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1635 | } |
1636 | ||
d7ba1388 MD |
1637 | int lttng_set_session_shm_path(const char *session_name, |
1638 | const char *shm_path) | |
1639 | { | |
1640 | struct lttcomm_session_msg lsm; | |
1641 | ||
1642 | if (session_name == NULL) { | |
1643 | return -LTTNG_ERR_INVALID; | |
1644 | } | |
1645 | ||
1646 | memset(&lsm, 0, sizeof(lsm)); | |
1647 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1648 | ||
1649 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1650 | sizeof(lsm.session.name)); | |
1651 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1652 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1653 | ||
1654 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1655 | } | |
1656 | ||
9f19cc17 | 1657 | /* |
9ae110e2 JG |
1658 | * Ask the session daemon for all available domains of a session. |
1659 | * Sets the contents of the domains array. | |
1660 | * Returns the number of lttng_domain entries in domains; | |
1661 | * on error, returns a negative value. | |
9f19cc17 | 1662 | */ |
330be774 | 1663 | int lttng_list_domains(const char *session_name, |
cd80958d | 1664 | struct lttng_domain **domains) |
9f19cc17 DG |
1665 | { |
1666 | int ret; | |
cd80958d DG |
1667 | struct lttcomm_session_msg lsm; |
1668 | ||
330be774 | 1669 | if (session_name == NULL) { |
2f70b271 | 1670 | return -LTTNG_ERR_INVALID; |
cd80958d | 1671 | } |
9f19cc17 | 1672 | |
53efb85a | 1673 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1674 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1675 | ||
cac3069d DG |
1676 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1677 | sizeof(lsm.session.name)); | |
cd80958d | 1678 | |
cac3069d | 1679 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1680 | if (ret < 0) { |
1681 | return ret; | |
1682 | } | |
1683 | ||
1684 | return ret / sizeof(struct lttng_domain); | |
1685 | } | |
1686 | ||
1687 | /* | |
9ae110e2 JG |
1688 | * Ask the session daemon for all available channels of a session. |
1689 | * Sets the contents of the channels array. | |
1690 | * Returns the number of lttng_channel entries in channels; | |
1691 | * on error, returns a negative value. | |
9f19cc17 | 1692 | */ |
cd80958d DG |
1693 | int lttng_list_channels(struct lttng_handle *handle, |
1694 | struct lttng_channel **channels) | |
9f19cc17 DG |
1695 | { |
1696 | int ret; | |
cd80958d DG |
1697 | struct lttcomm_session_msg lsm; |
1698 | ||
9d697d3d | 1699 | if (handle == NULL) { |
2f70b271 | 1700 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1701 | } |
1702 | ||
53efb85a | 1703 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1704 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1705 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1706 | sizeof(lsm.session.name)); |
9f19cc17 | 1707 | |
cac3069d | 1708 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1709 | |
cac3069d | 1710 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 DG |
1711 | if (ret < 0) { |
1712 | return ret; | |
1713 | } | |
1714 | ||
1715 | return ret / sizeof(struct lttng_channel); | |
1716 | } | |
1717 | ||
1718 | /* | |
9ae110e2 JG |
1719 | * Ask the session daemon for all available events of a session channel. |
1720 | * Sets the contents of the events array. | |
1721 | * Returns the number of lttng_event entries in events; | |
1722 | * on error, returns a negative value. | |
9f19cc17 | 1723 | */ |
cd80958d DG |
1724 | int lttng_list_events(struct lttng_handle *handle, |
1725 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1726 | { |
1727 | int ret; | |
cd80958d | 1728 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
1729 | struct lttcomm_event_command_header *cmd_header = NULL; |
1730 | size_t cmd_header_len; | |
1731 | uint32_t nb_events, i; | |
1732 | void *extended_at; | |
9f19cc17 | 1733 | |
9d697d3d DG |
1734 | /* Safety check. An handle and channel name are mandatory */ |
1735 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1736 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1737 | } |
1738 | ||
53efb85a | 1739 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1740 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1741 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1742 | sizeof(lsm.session.name)); |
cac3069d | 1743 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 1744 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 1745 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1746 | |
b4e3ceb9 PP |
1747 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, NULL, 0, (void **) events, |
1748 | (void **) &cmd_header, &cmd_header_len); | |
9f19cc17 | 1749 | if (ret < 0) { |
b4e3ceb9 | 1750 | goto error; |
9f19cc17 DG |
1751 | } |
1752 | ||
b4e3ceb9 PP |
1753 | /* Set number of events and free command header */ |
1754 | nb_events = cmd_header->nb_events; | |
1755 | if (nb_events > INT_MAX) { | |
1756 | ret = -EOVERFLOW; | |
1757 | goto error; | |
1758 | } | |
1759 | ret = (int) nb_events; | |
1760 | free(cmd_header); | |
1761 | cmd_header = NULL; | |
1762 | ||
1763 | /* Set extended info pointers */ | |
1764 | extended_at = ((void*) (*events)) + | |
1765 | nb_events * sizeof(struct lttng_event); | |
1766 | ||
1767 | for (i = 0; i < nb_events; i++) { | |
1768 | struct lttcomm_event_extended_header *ext_header; | |
1769 | struct lttng_event *event = &(*events)[i]; | |
1770 | ||
1771 | event->extended.ptr = extended_at; | |
1772 | ext_header = | |
1773 | (struct lttcomm_event_extended_header *) extended_at; | |
1774 | extended_at += sizeof(*ext_header); | |
1775 | extended_at += ext_header->filter_len; | |
1776 | } | |
1777 | ||
1778 | return ret; | |
1779 | error: | |
1780 | free(cmd_header); | |
1781 | free(*events); | |
1782 | return ret; | |
9f19cc17 DG |
1783 | } |
1784 | ||
d31d3e8c PP |
1785 | int lttng_event_get_filter_string(struct lttng_event *event, |
1786 | const char **filter_string) | |
1787 | { | |
1788 | int ret = 0; | |
1789 | struct lttcomm_event_extended_header *ext_header; | |
1790 | ||
1791 | if (!event || !filter_string) { | |
1792 | ret = -LTTNG_ERR_INVALID; | |
1793 | goto end; | |
1794 | } | |
1795 | ||
1796 | ext_header = event->extended.ptr; | |
1797 | ||
1798 | if (!ext_header) { | |
1799 | /* | |
1800 | * This can happen since the lttng_event structure is | |
1801 | * used for other tasks where this pointer is never set. | |
1802 | */ | |
1803 | *filter_string = NULL; | |
1804 | goto end; | |
1805 | } | |
1806 | ||
1807 | if (ext_header->filter_len) { | |
1808 | *filter_string = ((const char *) (ext_header)) + | |
1809 | sizeof(*ext_header); | |
1810 | } else { | |
1811 | *filter_string = NULL; | |
1812 | } | |
1813 | ||
1814 | end: | |
1815 | return ret; | |
1816 | } | |
b4e3ceb9 | 1817 | |
fac6795d | 1818 | /* |
1c8d13c8 TD |
1819 | * Sets the tracing_group variable with name. |
1820 | * This function allocates memory pointed to by tracing_group. | |
1821 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1822 | */ |
1823 | int lttng_set_tracing_group(const char *name) | |
1824 | { | |
9d697d3d | 1825 | if (name == NULL) { |
2f70b271 | 1826 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1827 | } |
1828 | ||
fac6795d | 1829 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1830 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1831 | } |
1832 | ||
1833 | return 0; | |
1834 | } | |
1835 | ||
d0254c7c | 1836 | /* |
af87c45a | 1837 | * Returns size of returned session payload data or a negative error code. |
d0254c7c | 1838 | */ |
cd80958d | 1839 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1840 | struct lttng_calibrate *calibrate) |
1841 | { | |
cd80958d | 1842 | struct lttcomm_session_msg lsm; |
d0254c7c | 1843 | |
9d697d3d DG |
1844 | /* Safety check. NULL pointer are forbidden */ |
1845 | if (handle == NULL || calibrate == NULL) { | |
2f70b271 | 1846 | return -LTTNG_ERR_INVALID; |
cd80958d | 1847 | } |
d0254c7c | 1848 | |
53efb85a | 1849 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1850 | lsm.cmd_type = LTTNG_CALIBRATE; |
cac3069d | 1851 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d0254c7c | 1852 | |
cd80958d DG |
1853 | memcpy(&lsm.u.calibrate, calibrate, sizeof(lsm.u.calibrate)); |
1854 | ||
cac3069d | 1855 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d0254c7c MD |
1856 | } |
1857 | ||
5edd7e09 DG |
1858 | /* |
1859 | * Set default channel attributes. | |
441c16a7 | 1860 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1861 | */ |
1862 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1863 | struct lttng_channel_attr *attr) | |
1864 | { | |
1865 | /* Safety check */ | |
1866 | if (attr == NULL || domain == NULL) { | |
1867 | return; | |
1868 | } | |
1869 | ||
eacaa7a6 DS |
1870 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1871 | ||
0a9c6494 DG |
1872 | /* Same for all domains. */ |
1873 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1874 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1875 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1876 | ||
5edd7e09 DG |
1877 | switch (domain->type) { |
1878 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
1879 | attr->switch_timer_interval = |
1880 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 1881 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 1882 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1883 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1884 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1885 | break; | |
1886 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1887 | switch (domain->buf_type) { |
1888 | case LTTNG_BUFFER_PER_UID: | |
1889 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1890 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1891 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
1892 | attr->switch_timer_interval = |
1893 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1894 | attr->read_timer_interval = | |
1895 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
1896 | break; |
1897 | case LTTNG_BUFFER_PER_PID: | |
1898 | default: | |
1899 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1900 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1901 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
1902 | attr->switch_timer_interval = |
1903 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1904 | attr->read_timer_interval = | |
1905 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
1906 | break; |
1907 | } | |
5edd7e09 | 1908 | default: |
441c16a7 | 1909 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1910 | break; |
1911 | } | |
1912 | } | |
1913 | ||
fac6795d | 1914 | /* |
2269e89e | 1915 | * Check if session daemon is alive. |
fac6795d | 1916 | * |
2269e89e | 1917 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 1918 | * On error returns a negative value. |
fac6795d | 1919 | */ |
947308c4 | 1920 | int lttng_session_daemon_alive(void) |
fac6795d DG |
1921 | { |
1922 | int ret; | |
1923 | ||
1924 | ret = set_session_daemon_path(); | |
1925 | if (ret < 0) { | |
9ae110e2 | 1926 | /* Error. */ |
fac6795d DG |
1927 | return ret; |
1928 | } | |
1929 | ||
9d035200 | 1930 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 1931 | /* |
9ae110e2 JG |
1932 | * No socket path set. Weird error which means the constructor |
1933 | * was not called. | |
2f70b271 DG |
1934 | */ |
1935 | assert(0); | |
fac6795d DG |
1936 | } |
1937 | ||
2269e89e | 1938 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 1939 | if (ret < 0) { |
9ae110e2 | 1940 | /* Not alive. */ |
7d8234d9 MD |
1941 | return 0; |
1942 | } | |
7d8234d9 | 1943 | |
9ae110e2 | 1944 | /* Is alive. */ |
947308c4 | 1945 | return 1; |
fac6795d DG |
1946 | } |
1947 | ||
00e2e675 | 1948 | /* |
a4b92340 | 1949 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
1950 | * |
1951 | * Return 0 on success, else a negative value. | |
1952 | */ | |
a4b92340 DG |
1953 | int lttng_set_consumer_url(struct lttng_handle *handle, |
1954 | const char *control_url, const char *data_url) | |
00e2e675 | 1955 | { |
3dd05a85 | 1956 | int ret; |
a4b92340 | 1957 | ssize_t size; |
00e2e675 | 1958 | struct lttcomm_session_msg lsm; |
a4b92340 | 1959 | struct lttng_uri *uris = NULL; |
00e2e675 | 1960 | |
a4b92340 | 1961 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 1962 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1963 | } |
1964 | ||
a4b92340 DG |
1965 | memset(&lsm, 0, sizeof(lsm)); |
1966 | ||
00e2e675 DG |
1967 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
1968 | ||
cac3069d | 1969 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 1970 | sizeof(lsm.session.name)); |
cac3069d | 1971 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 1972 | |
bc894455 | 1973 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 1974 | if (size < 0) { |
2f70b271 | 1975 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
1976 | } |
1977 | ||
1978 | lsm.u.uri.size = size; | |
00e2e675 | 1979 | |
795a978d | 1980 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1981 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1982 | |
1983 | free(uris); | |
1984 | return ret; | |
00e2e675 DG |
1985 | } |
1986 | ||
1987 | /* | |
9c6bda17 | 1988 | * [OBSOLETE] |
00e2e675 DG |
1989 | */ |
1990 | int lttng_enable_consumer(struct lttng_handle *handle) | |
1991 | { | |
785d2d0d | 1992 | return -ENOSYS; |
00e2e675 DG |
1993 | } |
1994 | ||
1995 | /* | |
9c6bda17 | 1996 | * [OBSOLETE] |
00e2e675 DG |
1997 | */ |
1998 | int lttng_disable_consumer(struct lttng_handle *handle) | |
1999 | { | |
785d2d0d | 2000 | return -ENOSYS; |
00e2e675 DG |
2001 | } |
2002 | ||
07424f16 DG |
2003 | /* |
2004 | * This is an extension of create session that is ONLY and SHOULD only be used | |
2005 | * by the lttng command line program. It exists to avoid using URI parsing in | |
2006 | * the lttng client. | |
2007 | * | |
2008 | * We need the date and time for the trace path subdirectory for the case where | |
2009 | * the user does NOT define one using either -o or -U. Using the normal | |
2010 | * lttng_create_session API call, we have no clue on the session daemon side if | |
2011 | * the URL was generated automatically by the client or define by the user. | |
2012 | * | |
2013 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
2014 | * string and appends it if necessary to the URI subdirectory before sending it | |
2015 | * to the session daemon. | |
2016 | * | |
2017 | * With this extra function, the lttng_create_session call behavior is not | |
2018 | * changed and the timestamp is appended to the URI on the session daemon side | |
2019 | * if necessary. | |
2020 | */ | |
2021 | int _lttng_create_session_ext(const char *name, const char *url, | |
2022 | const char *datetime) | |
2023 | { | |
3dd05a85 | 2024 | int ret; |
07424f16 DG |
2025 | ssize_t size; |
2026 | struct lttcomm_session_msg lsm; | |
2027 | struct lttng_uri *uris = NULL; | |
2028 | ||
2bba9e53 | 2029 | if (name == NULL || datetime == NULL) { |
2f70b271 | 2030 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
2031 | } |
2032 | ||
2033 | memset(&lsm, 0, sizeof(lsm)); | |
2034 | ||
2035 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 2036 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 | 2037 | |
9ae110e2 | 2038 | /* There should never be a data URL. */ |
bc894455 | 2039 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 2040 | if (size < 0) { |
3dd05a85 DG |
2041 | ret = -LTTNG_ERR_INVALID; |
2042 | goto error; | |
07424f16 DG |
2043 | } |
2044 | ||
2045 | lsm.u.uri.size = size; | |
2046 | ||
4b35a6b3 | 2047 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
2048 | /* Don't append datetime if the name was automatically created. */ |
2049 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
2050 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
2051 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
2052 | name, datetime); | |
2053 | } else { | |
2054 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2055 | } | |
07424f16 DG |
2056 | if (ret < 0) { |
2057 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
2058 | ret = -LTTNG_ERR_FATAL; |
2059 | goto error; | |
07424f16 DG |
2060 | } |
2061 | } | |
2062 | ||
795a978d | 2063 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2064 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2065 | |
2066 | error: | |
2067 | free(uris); | |
2068 | return ret; | |
07424f16 DG |
2069 | } |
2070 | ||
806e2684 DG |
2071 | /* |
2072 | * For a given session name, this call checks if the data is ready to be read | |
2073 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2074 | * any readers. | |
2075 | */ | |
6d805429 | 2076 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2077 | { |
2078 | int ret; | |
2079 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2080 | uint8_t *pending = NULL; |
806e2684 DG |
2081 | |
2082 | if (session_name == NULL) { | |
2083 | return -LTTNG_ERR_INVALID; | |
2084 | } | |
2085 | ||
53efb85a | 2086 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2087 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2088 | |
cac3069d DG |
2089 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2090 | sizeof(lsm.session.name)); | |
806e2684 | 2091 | |
f6151c55 JG |
2092 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2093 | if (ret < 0) { | |
2094 | goto end; | |
2095 | } else if (ret != 1) { | |
2096 | /* Unexpected payload size */ | |
2097 | ret = -LTTNG_ERR_INVALID; | |
2098 | goto end; | |
806e2684 DG |
2099 | } |
2100 | ||
f6151c55 JG |
2101 | ret = (int) *pending; |
2102 | end: | |
2103 | free(pending); | |
806e2684 DG |
2104 | return ret; |
2105 | } | |
2106 | ||
27babd3a DG |
2107 | /* |
2108 | * Create a session exclusively used for snapshot. | |
2109 | * | |
2110 | * Returns LTTNG_OK on success or a negative error code. | |
2111 | */ | |
2112 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2113 | { | |
2114 | int ret; | |
2115 | ssize_t size; | |
2116 | struct lttcomm_session_msg lsm; | |
2117 | struct lttng_uri *uris = NULL; | |
2118 | ||
2119 | if (name == NULL) { | |
2120 | return -LTTNG_ERR_INVALID; | |
2121 | } | |
2122 | ||
2123 | memset(&lsm, 0, sizeof(lsm)); | |
2124 | ||
2125 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
2126 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2127 | ||
2128 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2129 | if (size < 0) { | |
2130 | return -LTTNG_ERR_INVALID; | |
2131 | } | |
2132 | ||
2133 | lsm.u.uri.size = size; | |
2134 | ||
795a978d | 2135 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
27babd3a DG |
2136 | sizeof(struct lttng_uri) * size, NULL); |
2137 | ||
2138 | free(uris); | |
2139 | return ret; | |
2140 | } | |
2141 | ||
ecc48a90 JD |
2142 | /* |
2143 | * Create a session exclusively used for live. | |
2144 | * | |
2145 | * Returns LTTNG_OK on success or a negative error code. | |
2146 | */ | |
2147 | int lttng_create_session_live(const char *name, const char *url, | |
2148 | unsigned int timer_interval) | |
2149 | { | |
2150 | int ret; | |
2151 | ssize_t size; | |
2152 | struct lttcomm_session_msg lsm; | |
2153 | struct lttng_uri *uris = NULL; | |
2154 | ||
92805ee4 | 2155 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
2156 | return -LTTNG_ERR_INVALID; |
2157 | } | |
2158 | ||
2159 | memset(&lsm, 0, sizeof(lsm)); | |
2160 | ||
2161 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
2162 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2163 | ||
1a241656 DG |
2164 | if (url) { |
2165 | size = uri_parse_str_urls(url, NULL, &uris); | |
2166 | if (size <= 0) { | |
2167 | ret = -LTTNG_ERR_INVALID; | |
2168 | goto end; | |
2169 | } | |
ecc48a90 | 2170 | |
1a241656 DG |
2171 | /* file:// is not accepted for live session. */ |
2172 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
2173 | ret = -LTTNG_ERR_INVALID; | |
2174 | goto end; | |
2175 | } | |
2176 | } else { | |
2177 | size = 0; | |
ecc48a90 JD |
2178 | } |
2179 | ||
2180 | lsm.u.session_live.nb_uri = size; | |
2181 | lsm.u.session_live.timer_interval = timer_interval; | |
2182 | ||
795a978d | 2183 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
ecc48a90 JD |
2184 | sizeof(struct lttng_uri) * size, NULL); |
2185 | ||
2186 | end: | |
2187 | free(uris); | |
2188 | return ret; | |
2189 | } | |
2190 | ||
a5dfbb9d MD |
2191 | /* |
2192 | * List PIDs in the tracker. | |
2193 | * | |
1b18ce93 JG |
2194 | * enabled is set to whether the PID tracker is enabled. |
2195 | * pids is set to an allocated array of PIDs currently tracked. On | |
2196 | * success, pids must be freed by the caller. | |
2197 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2198 | * |
2199 | * Returns 0 on success, else a negative LTTng error code. | |
2200 | */ | |
2201 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2202 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2203 | { | |
ebbf5ab7 JR |
2204 | int ret; |
2205 | int enabled = 1; | |
a5dfbb9d MD |
2206 | struct lttcomm_session_msg lsm; |
2207 | size_t nr_pids; | |
2208 | int32_t *pids; | |
2209 | ||
2210 | if (handle == NULL) { | |
2211 | return -LTTNG_ERR_INVALID; | |
2212 | } | |
2213 | ||
2214 | memset(&lsm, 0, sizeof(lsm)); | |
2215 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2216 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2217 | sizeof(lsm.session.name)); | |
2218 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2219 | ||
2220 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2221 | if (ret < 0) { | |
2222 | return ret; | |
2223 | } | |
2224 | nr_pids = ret / sizeof(int32_t); | |
2225 | if (nr_pids == 1 && pids[0] == -1) { | |
2226 | free(pids); | |
2227 | pids = NULL; | |
2228 | enabled = 0; | |
2229 | nr_pids = 0; | |
2230 | } | |
2231 | *_enabled = enabled; | |
2232 | *_pids = pids; | |
2233 | *_nr_pids = nr_pids; | |
2234 | return 0; | |
2235 | } | |
2236 | ||
fac6795d | 2237 | /* |
9ae110e2 | 2238 | * lib constructor. |
fac6795d DG |
2239 | */ |
2240 | static void __attribute__((constructor)) init() | |
2241 | { | |
2242 | /* Set default session group */ | |
bbccc3d2 | 2243 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2244 | } |
49cca668 DG |
2245 | |
2246 | /* | |
9ae110e2 | 2247 | * lib destructor. |
49cca668 DG |
2248 | */ |
2249 | static void __attribute__((destructor)) lttng_ctl_exit() | |
2250 | { | |
2251 | free(tracing_group); | |
2252 | } |