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> |
a58c490f JG |
39 | #include <lttng/trigger/trigger-internal.h> |
40 | #include <lttng/endpoint.h> | |
41 | #include <lttng/channel-internal.h> | |
fac6795d | 42 | |
d00c599e DG |
43 | #include "filter/filter-ast.h" |
44 | #include "filter/filter-parser.h" | |
45 | #include "filter/filter-bytecode.h" | |
46 | #include "filter/memstream.h" | |
cac3069d | 47 | #include "lttng-ctl-helper.h" |
53a80697 MD |
48 | |
49 | #ifdef DEBUG | |
d00c599e | 50 | static const int print_xml = 1; |
53a80697 MD |
51 | #define dbg_printf(fmt, args...) \ |
52 | printf("[debug liblttng-ctl] " fmt, ## args) | |
53 | #else | |
d00c599e | 54 | static const int print_xml = 0; |
53a80697 MD |
55 | #define dbg_printf(fmt, args...) \ |
56 | do { \ | |
57 | /* do nothing but check printf format */ \ | |
58 | if (0) \ | |
59 | printf("[debug liblttnctl] " fmt, ## args); \ | |
60 | } while (0) | |
61 | #endif | |
62 | ||
63 | ||
fac6795d DG |
64 | /* Socket to session daemon for communication */ |
65 | static int sessiond_socket; | |
66 | static char sessiond_sock_path[PATH_MAX]; | |
67 | ||
fac6795d DG |
68 | /* Variables */ |
69 | static char *tracing_group; | |
70 | static int connected; | |
71 | ||
97e19046 DG |
72 | /* Global */ |
73 | ||
74 | /* | |
75 | * Those two variables are used by error.h to silent or control the verbosity of | |
76 | * error message. They are global to the library so application linking with it | |
77 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
78 | */ |
79 | int lttng_opt_quiet; | |
80 | int lttng_opt_verbose; | |
c7e35b03 | 81 | int lttng_opt_mi; |
97e19046 | 82 | |
99497cd0 MD |
83 | /* |
84 | * Copy string from src to dst and enforce null terminated byte. | |
85 | */ | |
cac3069d DG |
86 | LTTNG_HIDDEN |
87 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 88 | { |
e7d6716d | 89 | if (src && dst) { |
99497cd0 MD |
90 | strncpy(dst, src, len); |
91 | /* Enforce the NULL terminated byte */ | |
92 | dst[len - 1] = '\0'; | |
cd80958d DG |
93 | } else if (dst) { |
94 | dst[0] = '\0'; | |
99497cd0 MD |
95 | } |
96 | } | |
97 | ||
fac6795d | 98 | /* |
cd80958d | 99 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 100 | * |
cd80958d DG |
101 | * If domain is unknown, default domain will be the kernel. |
102 | */ | |
cac3069d DG |
103 | LTTNG_HIDDEN |
104 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
105 | struct lttng_domain *src) | |
cd80958d DG |
106 | { |
107 | if (src && dst) { | |
108 | switch (src->type) { | |
00e2e675 DG |
109 | case LTTNG_DOMAIN_KERNEL: |
110 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 111 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 112 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 113 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
114 | memcpy(dst, src, sizeof(struct lttng_domain)); |
115 | break; | |
116 | default: | |
117 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 118 | break; |
cd80958d DG |
119 | } |
120 | } | |
121 | } | |
122 | ||
123 | /* | |
124 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 125 | * |
1c8d13c8 TD |
126 | * On success, returns the number of bytes sent (>=0) |
127 | * On error, returns -1 | |
fac6795d | 128 | */ |
cd80958d | 129 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
130 | { |
131 | int ret; | |
132 | ||
133 | if (!connected) { | |
2f70b271 | 134 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 135 | goto end; |
fac6795d DG |
136 | } |
137 | ||
a4b92340 DG |
138 | DBG("LSM cmd type : %d", lsm->cmd_type); |
139 | ||
be040666 | 140 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 141 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
142 | if (ret < 0) { |
143 | ret = -LTTNG_ERR_FATAL; | |
144 | } | |
e065084a DG |
145 | |
146 | end: | |
147 | return ret; | |
148 | } | |
149 | ||
53a80697 MD |
150 | /* |
151 | * Send var len data to the session daemon. | |
152 | * | |
153 | * On success, returns the number of bytes sent (>=0) | |
154 | * On error, returns -1 | |
155 | */ | |
c2d69327 | 156 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
157 | { |
158 | int ret; | |
159 | ||
160 | if (!connected) { | |
2f70b271 | 161 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
162 | goto end; |
163 | } | |
a4b92340 | 164 | |
53a80697 MD |
165 | if (!data || !len) { |
166 | ret = 0; | |
167 | goto end; | |
168 | } | |
169 | ||
170 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
171 | if (ret < 0) { |
172 | ret = -LTTNG_ERR_FATAL; | |
173 | } | |
53a80697 MD |
174 | |
175 | end: | |
176 | return ret; | |
177 | } | |
178 | ||
e065084a | 179 | /* |
cd80958d | 180 | * Receive data from the sessiond socket. |
e065084a | 181 | * |
1c8d13c8 TD |
182 | * On success, returns the number of bytes received (>=0) |
183 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 184 | */ |
ca95a216 | 185 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
186 | { |
187 | int ret; | |
188 | ||
189 | if (!connected) { | |
2f70b271 | 190 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 191 | goto end; |
fac6795d DG |
192 | } |
193 | ||
ca95a216 | 194 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
195 | if (ret < 0) { |
196 | ret = -LTTNG_ERR_FATAL; | |
197 | } | |
fac6795d | 198 | |
e065084a | 199 | end: |
fac6795d DG |
200 | return ret; |
201 | } | |
202 | ||
203 | /* | |
9ae110e2 | 204 | * Check if we are in the specified group. |
65beb5ff | 205 | * |
9ae110e2 | 206 | * If yes return 1, else return -1. |
947308c4 | 207 | */ |
6c71277b MD |
208 | LTTNG_HIDDEN |
209 | int lttng_check_tracing_group(void) | |
947308c4 | 210 | { |
d7458e2f | 211 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
212 | int grp_list_size, grp_id, i; |
213 | int ret = -1; | |
6c71277b | 214 | const char *grp_name = tracing_group; |
947308c4 DG |
215 | |
216 | /* Get GID of group 'tracing' */ | |
d7458e2f | 217 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 218 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
219 | goto end; |
220 | } | |
221 | ||
222 | /* Get number of supplementary group IDs */ | |
223 | grp_list_size = getgroups(0, NULL); | |
224 | if (grp_list_size < 0) { | |
6f04ed72 | 225 | PERROR("getgroups"); |
947308c4 DG |
226 | goto end; |
227 | } | |
228 | ||
229 | /* Alloc group list of the right size */ | |
3f451dc0 | 230 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 231 | if (!grp_list) { |
6f04ed72 | 232 | PERROR("malloc"); |
00795392 MD |
233 | goto end; |
234 | } | |
947308c4 | 235 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 236 | if (grp_id < 0) { |
6f04ed72 | 237 | PERROR("getgroups"); |
947308c4 DG |
238 | goto free_list; |
239 | } | |
240 | ||
241 | for (i = 0; i < grp_list_size; i++) { | |
d7458e2f | 242 | if (grp_list[i] == tracing_gid) { |
2269e89e | 243 | ret = 1; |
947308c4 DG |
244 | break; |
245 | } | |
246 | } | |
247 | ||
248 | free_list: | |
249 | free(grp_list); | |
250 | ||
251 | end: | |
252 | return ret; | |
253 | } | |
254 | ||
255 | /* | |
2269e89e DG |
256 | * Try connect to session daemon with sock_path. |
257 | * | |
258 | * Return 0 on success, else -1 | |
259 | */ | |
260 | static int try_connect_sessiond(const char *sock_path) | |
261 | { | |
262 | int ret; | |
263 | ||
264 | /* If socket exist, we check if the daemon listens for connect. */ | |
265 | ret = access(sock_path, F_OK); | |
266 | if (ret < 0) { | |
267 | /* Not alive */ | |
2f70b271 | 268 | goto error; |
2269e89e DG |
269 | } |
270 | ||
271 | ret = lttcomm_connect_unix_sock(sock_path); | |
272 | if (ret < 0) { | |
9ae110e2 | 273 | /* Not alive. */ |
2f70b271 | 274 | goto error; |
2269e89e DG |
275 | } |
276 | ||
277 | ret = lttcomm_close_unix_sock(ret); | |
278 | if (ret < 0) { | |
6f04ed72 | 279 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
280 | } |
281 | ||
282 | return 0; | |
2f70b271 DG |
283 | |
284 | error: | |
285 | return -1; | |
2269e89e DG |
286 | } |
287 | ||
288 | /* | |
2f70b271 DG |
289 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
290 | * variable. | |
291 | * | |
292 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
293 | * is somehow too long or ENOMEM). | |
947308c4 DG |
294 | */ |
295 | static int set_session_daemon_path(void) | |
296 | { | |
9ae110e2 | 297 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
298 | uid_t uid; |
299 | ||
300 | uid = getuid(); | |
947308c4 | 301 | |
2269e89e DG |
302 | if (uid != 0) { |
303 | /* Are we in the tracing group ? */ | |
6c71277b | 304 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
305 | } |
306 | ||
08a9c49f | 307 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
308 | lttng_ctl_copy_string(sessiond_sock_path, |
309 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 310 | } |
2269e89e | 311 | |
08a9c49f | 312 | if (uid != 0) { |
c617c0c6 MD |
313 | int ret; |
314 | ||
08a9c49f | 315 | if (in_tgroup) { |
9ae110e2 | 316 | /* Tracing group. */ |
08a9c49f TD |
317 | ret = try_connect_sessiond(sessiond_sock_path); |
318 | if (ret >= 0) { | |
319 | goto end; | |
2269e89e | 320 | } |
08a9c49f | 321 | /* Global session daemon not available... */ |
2269e89e | 322 | } |
08a9c49f TD |
323 | /* ...or not in tracing group (and not root), default */ |
324 | ||
325 | /* | |
9ae110e2 JG |
326 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
327 | * is too small; | |
328 | * With GNU C >= 2.1, snprintf returns the required size | |
329 | * (excluding closing null) | |
08a9c49f TD |
330 | */ |
331 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 332 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 333 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 334 | goto error; |
947308c4 | 335 | } |
947308c4 | 336 | } |
08a9c49f | 337 | end: |
947308c4 | 338 | return 0; |
2f70b271 DG |
339 | |
340 | error: | |
341 | return -1; | |
947308c4 DG |
342 | } |
343 | ||
65beb5ff | 344 | /* |
9ae110e2 | 345 | * Connect to the LTTng session daemon. |
65beb5ff | 346 | * |
9ae110e2 | 347 | * On success, return 0. On error, return -1. |
65beb5ff DG |
348 | */ |
349 | static int connect_sessiond(void) | |
350 | { | |
351 | int ret; | |
352 | ||
da3c9ec1 DG |
353 | /* Don't try to connect if already connected. */ |
354 | if (connected) { | |
355 | return 0; | |
356 | } | |
357 | ||
65beb5ff DG |
358 | ret = set_session_daemon_path(); |
359 | if (ret < 0) { | |
2f70b271 | 360 | goto error; |
65beb5ff DG |
361 | } |
362 | ||
9ae110e2 | 363 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
364 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
365 | if (ret < 0) { | |
2f70b271 | 366 | goto error; |
65beb5ff DG |
367 | } |
368 | ||
369 | sessiond_socket = ret; | |
370 | connected = 1; | |
371 | ||
372 | return 0; | |
2f70b271 DG |
373 | |
374 | error: | |
375 | return -1; | |
65beb5ff DG |
376 | } |
377 | ||
378 | /* | |
1c8d13c8 | 379 | * Clean disconnect from the session daemon. |
9ae110e2 | 380 | * |
1c8d13c8 | 381 | * On success, return 0. On error, return -1. |
65beb5ff DG |
382 | */ |
383 | static int disconnect_sessiond(void) | |
384 | { | |
385 | int ret = 0; | |
386 | ||
387 | if (connected) { | |
388 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
389 | sessiond_socket = 0; | |
390 | connected = 0; | |
391 | } | |
392 | ||
393 | return ret; | |
394 | } | |
395 | ||
795a978d PP |
396 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
397 | size_t *user_len) | |
398 | { | |
399 | int ret = 0; | |
400 | void *buf = NULL; | |
401 | ||
402 | if (len) { | |
403 | if (!user_len) { | |
404 | ret = -LTTNG_ERR_INVALID; | |
405 | goto end; | |
406 | } | |
407 | ||
408 | buf = zmalloc(len); | |
409 | if (!buf) { | |
410 | ret = -ENOMEM; | |
411 | goto end; | |
412 | } | |
413 | ||
414 | ret = recv_data_sessiond(buf, len); | |
415 | if (ret < 0) { | |
416 | goto end; | |
417 | } | |
418 | ||
419 | if (!user_buf) { | |
420 | ret = -LTTNG_ERR_INVALID; | |
421 | goto end; | |
422 | } | |
423 | ||
424 | /* Move ownership of command header buffer to user. */ | |
425 | *user_buf = buf; | |
426 | buf = NULL; | |
427 | *user_len = len; | |
428 | } else { | |
429 | /* No command header. */ | |
430 | if (user_len) { | |
431 | *user_len = 0; | |
432 | } | |
433 | ||
434 | if (user_buf) { | |
435 | *user_buf = NULL; | |
436 | } | |
437 | } | |
438 | ||
439 | end: | |
440 | free(buf); | |
441 | return ret; | |
442 | } | |
443 | ||
35a6fdb7 | 444 | /* |
cd80958d | 445 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 446 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 447 | * |
af87c45a | 448 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 449 | */ |
cac3069d DG |
450 | LTTNG_HIDDEN |
451 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
795a978d PP |
452 | const void *vardata, size_t vardata_len, |
453 | void **user_payload_buf, void **user_cmd_header_buf, | |
454 | size_t *user_cmd_header_len) | |
65beb5ff DG |
455 | { |
456 | int ret; | |
795a978d | 457 | size_t payload_len; |
cd80958d | 458 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
459 | |
460 | ret = connect_sessiond(); | |
461 | if (ret < 0) { | |
2f70b271 | 462 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
463 | goto end; |
464 | } | |
465 | ||
65beb5ff | 466 | /* Send command to session daemon */ |
cd80958d | 467 | ret = send_session_msg(lsm); |
65beb5ff | 468 | if (ret < 0) { |
2f70b271 | 469 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
470 | goto end; |
471 | } | |
53a80697 | 472 | /* Send var len data */ |
795a978d | 473 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 474 | if (ret < 0) { |
2f70b271 | 475 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
476 | goto end; |
477 | } | |
65beb5ff DG |
478 | |
479 | /* Get header from data transmission */ | |
480 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
481 | if (ret < 0) { | |
2f70b271 | 482 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
483 | goto end; |
484 | } | |
485 | ||
486 | /* Check error code if OK */ | |
f73fabfd | 487 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
488 | ret = -llm.ret_code; |
489 | goto end; | |
490 | } | |
491 | ||
795a978d PP |
492 | /* Get command header from data transmission */ |
493 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
494 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 495 | if (ret < 0) { |
65beb5ff DG |
496 | goto end; |
497 | } | |
498 | ||
795a978d PP |
499 | /* Get payload from data transmission */ |
500 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
501 | &payload_len); | |
502 | if (ret < 0) { | |
83009e5e DG |
503 | goto end; |
504 | } | |
505 | ||
795a978d | 506 | ret = llm.data_size; |
65beb5ff DG |
507 | |
508 | end: | |
509 | disconnect_sessiond(); | |
510 | return ret; | |
511 | } | |
512 | ||
9f19cc17 | 513 | /* |
cd80958d | 514 | * Create lttng handle and return pointer. |
9ae110e2 | 515 | * |
1c8d13c8 | 516 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 517 | */ |
cd80958d DG |
518 | struct lttng_handle *lttng_create_handle(const char *session_name, |
519 | struct lttng_domain *domain) | |
9f19cc17 | 520 | { |
2f70b271 DG |
521 | struct lttng_handle *handle = NULL; |
522 | ||
3f451dc0 | 523 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 524 | if (handle == NULL) { |
2f70b271 | 525 | PERROR("malloc handle"); |
cd80958d DG |
526 | goto end; |
527 | } | |
528 | ||
529 | /* Copy session name */ | |
cac3069d | 530 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
531 | sizeof(handle->session_name)); |
532 | ||
95681498 JG |
533 | /* Copy lttng domain or leave initialized to 0. */ |
534 | if (domain) { | |
535 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
536 | } | |
cd80958d DG |
537 | |
538 | end: | |
539 | return handle; | |
540 | } | |
541 | ||
542 | /* | |
543 | * Destroy handle by free(3) the pointer. | |
544 | */ | |
545 | void lttng_destroy_handle(struct lttng_handle *handle) | |
546 | { | |
0e428499 | 547 | free(handle); |
eb354453 DG |
548 | } |
549 | ||
d9800920 DG |
550 | /* |
551 | * Register an outside consumer. | |
9ae110e2 | 552 | * |
1c8d13c8 | 553 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
554 | */ |
555 | int lttng_register_consumer(struct lttng_handle *handle, | |
556 | const char *socket_path) | |
557 | { | |
558 | struct lttcomm_session_msg lsm; | |
559 | ||
2f70b271 DG |
560 | if (handle == NULL || socket_path == NULL) { |
561 | return -LTTNG_ERR_INVALID; | |
562 | } | |
563 | ||
53efb85a | 564 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 565 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 566 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 567 | sizeof(lsm.session.name)); |
cac3069d | 568 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 569 | |
9ae110e2 JG |
570 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
571 | sizeof(lsm.u.reg.path)); | |
d9800920 | 572 | |
cac3069d | 573 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
574 | } |
575 | ||
1df4dedd | 576 | /* |
9ae110e2 JG |
577 | * Start tracing for all traces of the session. |
578 | * | |
579 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 580 | */ |
6a4f824d | 581 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 582 | { |
cd80958d DG |
583 | struct lttcomm_session_msg lsm; |
584 | ||
6a4f824d | 585 | if (session_name == NULL) { |
2f70b271 | 586 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
587 | } |
588 | ||
53efb85a | 589 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 590 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 591 | |
cac3069d DG |
592 | lttng_ctl_copy_string(lsm.session.name, session_name, |
593 | sizeof(lsm.session.name)); | |
cd80958d | 594 | |
cac3069d | 595 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 596 | } |
1df4dedd DG |
597 | |
598 | /* | |
38ee087f | 599 | * Stop tracing for all traces of the session. |
f3ed775e | 600 | */ |
38ee087f | 601 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 602 | { |
38ee087f | 603 | int ret, data_ret; |
cd80958d DG |
604 | struct lttcomm_session_msg lsm; |
605 | ||
6a4f824d | 606 | if (session_name == NULL) { |
2f70b271 | 607 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
608 | } |
609 | ||
53efb85a | 610 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 611 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 612 | |
cac3069d DG |
613 | lttng_ctl_copy_string(lsm.session.name, session_name, |
614 | sizeof(lsm.session.name)); | |
cd80958d | 615 | |
cac3069d | 616 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
617 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
618 | goto error; | |
619 | } | |
620 | ||
621 | if (!wait) { | |
622 | goto end; | |
623 | } | |
624 | ||
38ee087f DG |
625 | /* Check for data availability */ |
626 | do { | |
6d805429 | 627 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
628 | if (data_ret < 0) { |
629 | /* Return the data available call error. */ | |
630 | ret = data_ret; | |
631 | goto error; | |
632 | } | |
633 | ||
634 | /* | |
9ae110e2 JG |
635 | * Data sleep time before retrying (in usec). Don't sleep if the |
636 | * call returned value indicates availability. | |
38ee087f | 637 | */ |
6d805429 | 638 | if (data_ret) { |
38ee087f | 639 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 640 | } |
6d805429 | 641 | } while (data_ret != 0); |
38ee087f | 642 | |
38ee087f DG |
643 | end: |
644 | error: | |
645 | return ret; | |
646 | } | |
647 | ||
648 | /* | |
649 | * Stop tracing and wait for data availability. | |
650 | */ | |
651 | int lttng_stop_tracing(const char *session_name) | |
652 | { | |
653 | return _lttng_stop_tracing(session_name, 1); | |
654 | } | |
655 | ||
656 | /* | |
657 | * Stop tracing but _don't_ wait for data availability. | |
658 | */ | |
659 | int lttng_stop_tracing_no_wait(const char *session_name) | |
660 | { | |
661 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
662 | } |
663 | ||
664 | /* | |
601d5acf DG |
665 | * Add context to a channel. |
666 | * | |
667 | * If the given channel is NULL, add the contexts to all channels. | |
668 | * The event_name param is ignored. | |
af87c45a DG |
669 | * |
670 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 671 | */ |
cd80958d | 672 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
673 | struct lttng_event_context *ctx, const char *event_name, |
674 | const char *channel_name) | |
d65106b1 | 675 | { |
2001793c JG |
676 | int ret; |
677 | size_t len = 0; | |
678 | char *buf = NULL; | |
cd80958d DG |
679 | struct lttcomm_session_msg lsm; |
680 | ||
9ae110e2 | 681 | /* Safety check. Both are mandatory. */ |
9d697d3d | 682 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
683 | ret = -LTTNG_ERR_INVALID; |
684 | goto end; | |
cd80958d DG |
685 | } |
686 | ||
441c16a7 | 687 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
688 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
689 | ||
85076754 MD |
690 | /* If no channel name, send empty string. */ |
691 | if (channel_name == NULL) { | |
692 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
693 | sizeof(lsm.u.context.channel_name)); | |
694 | } else { | |
695 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
696 | sizeof(lsm.u.context.channel_name)); | |
697 | } | |
cd80958d | 698 | |
cac3069d | 699 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cac3069d | 700 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
701 | sizeof(lsm.session.name)); |
702 | ||
2001793c JG |
703 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
704 | size_t provider_len, ctx_len; | |
705 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
706 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
707 | ||
708 | if (!provider_name || !ctx_name) { | |
709 | ret = -LTTNG_ERR_INVALID; | |
710 | goto end; | |
711 | } | |
712 | ||
713 | provider_len = strlen(provider_name); | |
714 | if (provider_len == 0) { | |
715 | ret = -LTTNG_ERR_INVALID; | |
716 | goto end; | |
717 | } | |
718 | lsm.u.context.provider_name_len = provider_len; | |
719 | ||
720 | ctx_len = strlen(ctx_name); | |
721 | if (ctx_len == 0) { | |
722 | ret = -LTTNG_ERR_INVALID; | |
723 | goto end; | |
724 | } | |
725 | lsm.u.context.context_name_len = ctx_len; | |
726 | ||
727 | len = provider_len + ctx_len; | |
728 | buf = zmalloc(len); | |
729 | if (!buf) { | |
730 | ret = -LTTNG_ERR_NOMEM; | |
731 | goto end; | |
732 | } | |
733 | ||
734 | memcpy(buf, provider_name, provider_len); | |
735 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
736 | } | |
737 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
738 | |
739 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
740 | /* | |
741 | * Don't leak application addresses to the sessiond. | |
742 | * This is only necessary when ctx is for an app ctx otherwise | |
743 | * the values inside the union (type & config) are overwritten. | |
744 | */ | |
745 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
746 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
747 | } | |
2001793c | 748 | |
795a978d | 749 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
750 | end: |
751 | free(buf); | |
752 | return ret; | |
d65106b1 DG |
753 | } |
754 | ||
f3ed775e | 755 | /* |
9ae110e2 JG |
756 | * Enable event(s) for a channel. |
757 | * | |
758 | * If no event name is specified, all events are enabled. | |
759 | * If no channel name is specified, the default 'channel0' is used. | |
760 | * | |
761 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 762 | */ |
cd80958d | 763 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 764 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 765 | { |
f8a96544 JI |
766 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
767 | NULL, 0, NULL); | |
1df4dedd DG |
768 | } |
769 | ||
53a80697 | 770 | /* |
025faf73 | 771 | * Create or enable an event with a filter expression. |
178191b3 | 772 | * |
53a80697 MD |
773 | * Return negative error value on error. |
774 | * Return size of returned session payload data if OK. | |
775 | */ | |
025faf73 | 776 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 777 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
778 | const char *filter_expression) |
779 | { | |
f8a96544 JI |
780 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
781 | filter_expression, 0, NULL); | |
53a80697 MD |
782 | } |
783 | ||
347c5ab5 | 784 | /* |
0e115563 | 785 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
786 | * NULL if not applicable. |
787 | * | |
788 | * An event with NO loglevel and the name is * will return NULL. | |
789 | */ | |
0e115563 | 790 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
791 | { |
792 | int err; | |
0e115563 | 793 | char *agent_filter = NULL; |
347c5ab5 DG |
794 | |
795 | assert(ev); | |
796 | ||
797 | /* Don't add filter for the '*' event. */ | |
9f449915 | 798 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 799 | if (filter) { |
0e115563 | 800 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
801 | ev->name); |
802 | } else { | |
0e115563 | 803 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
804 | } |
805 | if (err < 0) { | |
806 | PERROR("asprintf"); | |
6a556f7b | 807 | goto error; |
347c5ab5 DG |
808 | } |
809 | } | |
810 | ||
811 | /* Add loglevel filtering if any for the JUL domain. */ | |
812 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
813 | char *op; | |
814 | ||
815 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
816 | op = ">="; | |
817 | } else { | |
818 | op = "=="; | |
819 | } | |
820 | ||
0e115563 | 821 | if (filter || agent_filter) { |
6a556f7b JG |
822 | char *new_filter; |
823 | ||
fb0edb23 | 824 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 825 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 826 | ev->loglevel); |
0e115563 DG |
827 | if (agent_filter) { |
828 | free(agent_filter); | |
6a556f7b | 829 | } |
0e115563 | 830 | agent_filter = new_filter; |
347c5ab5 | 831 | } else { |
0e115563 | 832 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
833 | ev->loglevel); |
834 | } | |
835 | if (err < 0) { | |
836 | PERROR("asprintf"); | |
6a556f7b | 837 | goto error; |
347c5ab5 DG |
838 | } |
839 | } | |
840 | ||
0e115563 | 841 | return agent_filter; |
6a556f7b | 842 | error: |
0e115563 | 843 | free(agent_filter); |
6a556f7b | 844 | return NULL; |
347c5ab5 DG |
845 | } |
846 | ||
137b9942 | 847 | /* |
ec166985 | 848 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
849 | * newly allocated parser context in ctxp and populate the lsm object with the |
850 | * expression len. | |
851 | * | |
852 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
853 | */ | |
854 | static int generate_filter(char *filter_expression, | |
855 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
856 | { | |
857 | int ret; | |
858 | struct filter_parser_ctx *ctx = NULL; | |
859 | FILE *fmem = NULL; | |
860 | ||
861 | assert(filter_expression); | |
862 | assert(lsm); | |
863 | assert(ctxp); | |
864 | ||
865 | /* | |
866 | * Casting const to non-const, as the underlying function will use it in | |
867 | * read-only mode. | |
868 | */ | |
869 | fmem = lttng_fmemopen((void *) filter_expression, | |
870 | strlen(filter_expression), "r"); | |
871 | if (!fmem) { | |
872 | fprintf(stderr, "Error opening memory as stream\n"); | |
873 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
874 | goto error; | |
875 | } | |
876 | ctx = filter_parser_ctx_alloc(fmem); | |
877 | if (!ctx) { | |
878 | fprintf(stderr, "Error allocating parser\n"); | |
879 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
880 | goto filter_alloc_error; | |
881 | } | |
882 | ret = filter_parser_ctx_append_ast(ctx); | |
883 | if (ret) { | |
884 | fprintf(stderr, "Parse error\n"); | |
885 | ret = -LTTNG_ERR_FILTER_INVAL; | |
886 | goto parse_error; | |
887 | } | |
888 | ret = filter_visitor_set_parent(ctx); | |
889 | if (ret) { | |
890 | fprintf(stderr, "Set parent error\n"); | |
891 | ret = -LTTNG_ERR_FILTER_INVAL; | |
892 | goto parse_error; | |
893 | } | |
894 | if (print_xml) { | |
895 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
896 | if (ret) { | |
897 | fflush(stdout); | |
898 | fprintf(stderr, "XML print error\n"); | |
899 | ret = -LTTNG_ERR_FILTER_INVAL; | |
900 | goto parse_error; | |
901 | } | |
902 | } | |
903 | ||
904 | dbg_printf("Generating IR... "); | |
905 | fflush(stdout); | |
906 | ret = filter_visitor_ir_generate(ctx); | |
907 | if (ret) { | |
908 | fprintf(stderr, "Generate IR error\n"); | |
909 | ret = -LTTNG_ERR_FILTER_INVAL; | |
910 | goto parse_error; | |
911 | } | |
912 | dbg_printf("done\n"); | |
913 | ||
914 | dbg_printf("Validating IR... "); | |
915 | fflush(stdout); | |
916 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
917 | if (ret) { | |
918 | ret = -LTTNG_ERR_FILTER_INVAL; | |
919 | goto parse_error; | |
920 | } | |
9f449915 PP |
921 | |
922 | /* Normalize globbing patterns in the expression. */ | |
923 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
924 | if (ret) { | |
925 | ret = -LTTNG_ERR_FILTER_INVAL; | |
926 | goto parse_error; | |
927 | } | |
928 | ||
9ae110e2 | 929 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
930 | ret = filter_visitor_ir_validate_string(ctx); |
931 | if (ret) { | |
932 | ret = -LTTNG_ERR_FILTER_INVAL; | |
933 | goto parse_error; | |
934 | } | |
9f449915 PP |
935 | |
936 | /* Validate globbing patterns in the expression. */ | |
937 | ret = filter_visitor_ir_validate_globbing(ctx); | |
938 | if (ret) { | |
939 | ret = -LTTNG_ERR_FILTER_INVAL; | |
940 | goto parse_error; | |
941 | } | |
942 | ||
137b9942 DG |
943 | dbg_printf("done\n"); |
944 | ||
945 | dbg_printf("Generating bytecode... "); | |
946 | fflush(stdout); | |
947 | ret = filter_visitor_bytecode_generate(ctx); | |
948 | if (ret) { | |
949 | fprintf(stderr, "Generate bytecode error\n"); | |
950 | ret = -LTTNG_ERR_FILTER_INVAL; | |
951 | goto parse_error; | |
952 | } | |
953 | dbg_printf("done\n"); | |
954 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
955 | bytecode_get_len(&ctx->bytecode->b)); | |
956 | ||
957 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
958 | + bytecode_get_len(&ctx->bytecode->b); | |
959 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
960 | ||
961 | /* No need to keep the memory stream. */ | |
962 | if (fclose(fmem) != 0) { | |
6f04ed72 | 963 | PERROR("fclose"); |
137b9942 DG |
964 | } |
965 | ||
966 | *ctxp = ctx; | |
967 | return 0; | |
968 | ||
969 | parse_error: | |
137b9942 DG |
970 | filter_ir_free(ctx); |
971 | filter_parser_ctx_free(ctx); | |
972 | filter_alloc_error: | |
973 | if (fclose(fmem) != 0) { | |
6f04ed72 | 974 | PERROR("fclose"); |
137b9942 DG |
975 | } |
976 | error: | |
977 | return ret; | |
978 | } | |
979 | ||
93deb080 JI |
980 | /* |
981 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
982 | * If no event name is specified, all events are enabled. | |
983 | * If no channel name is specified, the default name is used. | |
984 | * If filter expression is not NULL, the filter is set for the event. | |
985 | * If exclusion count is not zero, the exclusions are set for the event. | |
986 | * Returns size of returned session payload data or a negative error code. | |
987 | */ | |
988 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
989 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 990 | const char *original_filter_expression, |
93deb080 JI |
991 | int exclusion_count, char **exclusion_list) |
992 | { | |
993 | struct lttcomm_session_msg lsm; | |
64226865 | 994 | char *varlen_data; |
93deb080 | 995 | int ret = 0; |
137b9942 | 996 | unsigned int free_filter_expression = 0; |
93deb080 | 997 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
998 | /* |
999 | * Cast as non-const since we may replace the filter expression | |
1000 | * by a dynamically allocated string. Otherwise, the original | |
1001 | * string is not modified. | |
1002 | */ | |
1003 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1004 | |
1005 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1006 | ret = -LTTNG_ERR_INVALID; |
1007 | goto error; | |
93deb080 JI |
1008 | } |
1009 | ||
9ae110e2 JG |
1010 | /* |
1011 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1012 | * anyway, so treat this corner-case early to eliminate |
1013 | * lttng_fmemopen error for 0-byte allocation. | |
1014 | */ | |
1015 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1016 | ret = -LTTNG_ERR_INVALID; |
1017 | goto error; | |
93deb080 JI |
1018 | } |
1019 | ||
1020 | memset(&lsm, 0, sizeof(lsm)); | |
1021 | ||
1022 | /* If no channel name, send empty string. */ | |
1023 | if (channel_name == NULL) { | |
1024 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1025 | sizeof(lsm.u.enable.channel_name)); | |
1026 | } else { | |
1027 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1028 | sizeof(lsm.u.enable.channel_name)); | |
1029 | } | |
1030 | ||
18a720cd MD |
1031 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1032 | if (ev->name[0] == '\0') { | |
1033 | /* Enable all events */ | |
1034 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1035 | } |
93deb080 | 1036 | |
6565421f | 1037 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1038 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1039 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1040 | ||
1041 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1042 | sizeof(lsm.session.name)); | |
1043 | lsm.u.enable.exclusion_count = exclusion_count; | |
1044 | lsm.u.enable.bytecode_len = 0; | |
1045 | ||
9b21e6d5 DG |
1046 | /* |
1047 | * For the JUL domain, a filter is enforced except for the enable all | |
1048 | * event. This is done to avoid having the event in all sessions thus | |
1049 | * filtering by logger name. | |
1050 | */ | |
1051 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 | 1052 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
0e115563 DG |
1053 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1054 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
3e1c9ff7 | 1055 | goto ask_sessiond; |
93deb080 JI |
1056 | } |
1057 | ||
1058 | /* | |
1059 | * We have either a filter or some exclusions, so we need to set up | |
9ae110e2 | 1060 | * a variable-length memory block from where to send the data. |
93deb080 JI |
1061 | */ |
1062 | ||
9ae110e2 | 1063 | /* Parse filter expression. */ |
5cdb6027 | 1064 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1065 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1066 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1067 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1068 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1069 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1070 | char *agent_filter; | |
64226865 | 1071 | |
347c5ab5 | 1072 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1073 | agent_filter = set_agent_filter(filter_expression, ev); |
1074 | if (!agent_filter) { | |
137b9942 | 1075 | if (!filter_expression) { |
9ae110e2 JG |
1076 | /* |
1077 | * No JUL and no filter, just skip | |
1078 | * everything below. | |
1079 | */ | |
137b9942 DG |
1080 | goto ask_sessiond; |
1081 | } | |
64226865 DG |
1082 | } else { |
1083 | /* | |
9ae110e2 JG |
1084 | * With an agent filter, the original filter has |
1085 | * been added to it thus replace the filter | |
1086 | * expression. | |
64226865 | 1087 | */ |
0e115563 | 1088 | filter_expression = agent_filter; |
e9efbcd3 | 1089 | free_filter_expression = 1; |
9b21e6d5 | 1090 | } |
9b21e6d5 | 1091 | } |
93deb080 | 1092 | |
137b9942 | 1093 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1094 | if (ret) { |
137b9942 | 1095 | goto filter_error; |
93deb080 | 1096 | } |
6b453b5e JG |
1097 | } |
1098 | ||
1099 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
1100 | + lsm.u.enable.expression_len |
1101 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
1102 | if (!varlen_data) { |
1103 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 1104 | goto mem_error; |
6b453b5e | 1105 | } |
137b9942 | 1106 | |
9ae110e2 | 1107 | /* Put exclusion names first in the data. */ |
6b453b5e JG |
1108 | while (exclusion_count--) { |
1109 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
0c82ac62 PP |
1110 | *(exclusion_list + exclusion_count), |
1111 | LTTNG_SYMBOL_NAME_LEN - 1); | |
6b453b5e | 1112 | } |
9ae110e2 | 1113 | /* Add filter expression next. */ |
6b453b5e JG |
1114 | if (lsm.u.enable.expression_len != 0) { |
1115 | memcpy(varlen_data | |
1116 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1117 | filter_expression, | |
1118 | lsm.u.enable.expression_len); | |
1119 | } | |
9ae110e2 | 1120 | /* Add filter bytecode next. */ |
137b9942 | 1121 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1122 | memcpy(varlen_data |
1123 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1124 | + lsm.u.enable.expression_len, | |
1125 | &ctx->bytecode->b, | |
1126 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1127 | } |
1128 | ||
795a978d | 1129 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
67676bd8 | 1130 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
9ae110e2 JG |
1131 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, |
1132 | NULL); | |
6b453b5e | 1133 | free(varlen_data); |
93deb080 | 1134 | |
7ca1dc6f DG |
1135 | mem_error: |
1136 | if (filter_expression && ctx) { | |
93deb080 JI |
1137 | filter_bytecode_free(ctx); |
1138 | filter_ir_free(ctx); | |
1139 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1140 | } |
1141 | filter_error: | |
1142 | if (free_filter_expression) { | |
1143 | /* | |
9ae110e2 JG |
1144 | * The filter expression has been replaced and must be freed as |
1145 | * it is not the original filter expression received as a | |
1146 | * parameter. | |
7ca1dc6f DG |
1147 | */ |
1148 | free(filter_expression); | |
93deb080 | 1149 | } |
137b9942 DG |
1150 | error: |
1151 | /* | |
9ae110e2 JG |
1152 | * Return directly to the caller and don't ask the sessiond since |
1153 | * something went wrong in the parsing of data above. | |
137b9942 | 1154 | */ |
93deb080 | 1155 | return ret; |
3e1c9ff7 DG |
1156 | |
1157 | ask_sessiond: | |
1158 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1159 | return ret; | |
93deb080 JI |
1160 | } |
1161 | ||
6e911cad MD |
1162 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1163 | struct lttng_event *ev, const char *channel_name, | |
1164 | const char *original_filter_expression) | |
1df4dedd | 1165 | { |
cd80958d | 1166 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1167 | char *varlen_data; |
1168 | int ret = 0; | |
1169 | unsigned int free_filter_expression = 0; | |
1170 | struct filter_parser_ctx *ctx = NULL; | |
1171 | /* | |
1172 | * Cast as non-const since we may replace the filter expression | |
1173 | * by a dynamically allocated string. Otherwise, the original | |
1174 | * string is not modified. | |
1175 | */ | |
1176 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1177 | |
6e911cad MD |
1178 | if (handle == NULL || ev == NULL) { |
1179 | ret = -LTTNG_ERR_INVALID; | |
1180 | goto error; | |
1181 | } | |
1182 | ||
9ae110e2 JG |
1183 | /* |
1184 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1185 | * anyway, so treat this corner-case early to eliminate |
1186 | * lttng_fmemopen error for 0-byte allocation. | |
1187 | */ | |
1188 | if (filter_expression && filter_expression[0] == '\0') { | |
1189 | ret = -LTTNG_ERR_INVALID; | |
1190 | goto error; | |
cd80958d DG |
1191 | } |
1192 | ||
441c16a7 MD |
1193 | memset(&lsm, 0, sizeof(lsm)); |
1194 | ||
85076754 MD |
1195 | /* If no channel name, send empty string. */ |
1196 | if (channel_name == NULL) { | |
1197 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1198 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1199 | } else { |
85076754 | 1200 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1201 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1202 | } |
1203 | ||
18a720cd | 1204 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1205 | |
6e911cad MD |
1206 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1207 | /* FIXME: copying non-packed struct to packed struct. */ | |
1208 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1209 | ||
cac3069d | 1210 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1211 | sizeof(lsm.session.name)); |
6e911cad | 1212 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1213 | |
6e911cad MD |
1214 | /* |
1215 | * For the JUL domain, a filter is enforced except for the | |
1216 | * disable all event. This is done to avoid having the event in | |
1217 | * all sessions thus filtering by logger name. | |
1218 | */ | |
1219 | if (filter_expression == NULL && | |
1220 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1221 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1222 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1223 | goto ask_sessiond; |
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * We have a filter, so we need to set up a variable-length | |
1228 | * memory block from where to send the data. | |
1229 | */ | |
1230 | ||
1231 | /* Parse filter expression */ | |
1232 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1233 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1234 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1235 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1236 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1237 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1238 | char *agent_filter; | |
6e911cad MD |
1239 | |
1240 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1241 | agent_filter = set_agent_filter(filter_expression, ev); |
1242 | if (!agent_filter) { | |
6e911cad | 1243 | if (!filter_expression) { |
9ae110e2 JG |
1244 | /* |
1245 | * No JUL and no filter, just skip | |
1246 | * everything below. | |
1247 | */ | |
6e911cad MD |
1248 | goto ask_sessiond; |
1249 | } | |
1250 | } else { | |
1251 | /* | |
9ae110e2 JG |
1252 | * With a JUL filter, the original filter has |
1253 | * been added to it thus replace the filter | |
1254 | * expression. | |
6e911cad | 1255 | */ |
0e115563 | 1256 | filter_expression = agent_filter; |
6e911cad MD |
1257 | free_filter_expression = 1; |
1258 | } | |
1259 | } | |
1260 | ||
1261 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1262 | if (ret) { | |
1263 | goto filter_error; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1268 | + lsm.u.disable.expression_len); | |
1269 | if (!varlen_data) { | |
1270 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1271 | goto mem_error; | |
1272 | } | |
1273 | ||
9ae110e2 | 1274 | /* Add filter expression. */ |
6e911cad MD |
1275 | if (lsm.u.disable.expression_len != 0) { |
1276 | memcpy(varlen_data, | |
1277 | filter_expression, | |
1278 | lsm.u.disable.expression_len); | |
1279 | } | |
9ae110e2 | 1280 | /* Add filter bytecode next. */ |
6e911cad MD |
1281 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1282 | memcpy(varlen_data | |
1283 | + lsm.u.disable.expression_len, | |
1284 | &ctx->bytecode->b, | |
1285 | lsm.u.disable.bytecode_len); | |
1286 | } | |
1287 | ||
795a978d | 1288 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1289 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1290 | free(varlen_data); | |
1291 | ||
1292 | mem_error: | |
1293 | if (filter_expression && ctx) { | |
1294 | filter_bytecode_free(ctx); | |
1295 | filter_ir_free(ctx); | |
1296 | filter_parser_ctx_free(ctx); | |
1297 | } | |
1298 | filter_error: | |
1299 | if (free_filter_expression) { | |
1300 | /* | |
9ae110e2 JG |
1301 | * The filter expression has been replaced and must be freed as |
1302 | * it is not the original filter expression received as a | |
1303 | * parameter. | |
6e911cad MD |
1304 | */ |
1305 | free(filter_expression); | |
1306 | } | |
1307 | error: | |
1308 | /* | |
9ae110e2 JG |
1309 | * Return directly to the caller and don't ask the sessiond since |
1310 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1311 | */ |
1312 | return ret; | |
1313 | ||
1314 | ask_sessiond: | |
1315 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1316 | return ret; | |
1317 | } | |
1318 | ||
1319 | /* | |
9ae110e2 JG |
1320 | * Disable event(s) of a channel and domain. |
1321 | * If no event name is specified, all events are disabled. | |
1322 | * If no channel name is specified, the default 'channel0' is used. | |
1323 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1324 | */ |
1325 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1326 | const char *channel_name) | |
1327 | { | |
1328 | struct lttng_event ev; | |
1329 | ||
1330 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1331 | ev.loglevel = -1; |
6e911cad MD |
1332 | ev.type = LTTNG_EVENT_ALL; |
1333 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1334 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1335 | } |
1336 | ||
cf0bcb51 JG |
1337 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1338 | { | |
1339 | struct lttng_channel *channel = NULL; | |
1340 | struct lttng_channel_extended *extended = NULL; | |
1341 | ||
1342 | if (!domain) { | |
1343 | goto error; | |
1344 | } | |
1345 | ||
1346 | /* Validate domain. */ | |
1347 | switch (domain->type) { | |
1348 | case LTTNG_DOMAIN_UST: | |
1349 | switch (domain->buf_type) { | |
1350 | case LTTNG_BUFFER_PER_UID: | |
1351 | case LTTNG_BUFFER_PER_PID: | |
1352 | break; | |
1353 | default: | |
1354 | goto error; | |
1355 | } | |
1356 | break; | |
1357 | case LTTNG_DOMAIN_KERNEL: | |
1358 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1359 | goto error; | |
1360 | } | |
1361 | break; | |
1362 | default: | |
1363 | goto error; | |
1364 | } | |
1365 | ||
1366 | channel = zmalloc(sizeof(*channel)); | |
1367 | if (!channel) { | |
1368 | goto error; | |
1369 | } | |
1370 | ||
1371 | extended = zmalloc(sizeof(*extended)); | |
1372 | if (!extended) { | |
1373 | goto error; | |
1374 | } | |
1375 | ||
1376 | channel->attr.extended.ptr = extended; | |
1377 | ||
1378 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1379 | return channel; | |
1380 | error: | |
1381 | free(channel); | |
1382 | free(extended); | |
1383 | return NULL; | |
1384 | } | |
1385 | ||
1386 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1387 | { | |
1388 | if (!channel) { | |
1389 | return; | |
1390 | } | |
1391 | ||
1392 | if (channel->attr.extended.ptr) { | |
1393 | free(channel->attr.extended.ptr); | |
1394 | } | |
1395 | free(channel); | |
1396 | } | |
1397 | ||
1df4dedd | 1398 | /* |
9ae110e2 JG |
1399 | * Enable channel per domain |
1400 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1401 | */ |
cd80958d | 1402 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1403 | struct lttng_channel *in_chan) |
a5c5a2bd | 1404 | { |
cd80958d DG |
1405 | struct lttcomm_session_msg lsm; |
1406 | ||
9ae110e2 | 1407 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1408 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1409 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1410 | } |
1411 | ||
441c16a7 | 1412 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1413 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1414 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1415 | |
cf0bcb51 JG |
1416 | if (!in_chan->attr.extended.ptr) { |
1417 | struct lttng_channel *channel; | |
1418 | struct lttng_channel_extended *extended; | |
7d29a247 | 1419 | |
cf0bcb51 JG |
1420 | channel = lttng_channel_create(&handle->domain); |
1421 | if (!channel) { | |
1422 | return -LTTNG_ERR_NOMEM; | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * Create a new channel in order to use default extended | |
1427 | * attribute values. | |
1428 | */ | |
1429 | extended = (struct lttng_channel_extended *) | |
1430 | channel->attr.extended.ptr; | |
1431 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1432 | lttng_channel_destroy(channel); | |
1433 | } else { | |
1434 | struct lttng_channel_extended *extended; | |
1435 | ||
1436 | extended = (struct lttng_channel_extended *) | |
1437 | in_chan->attr.extended.ptr; | |
1438 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1439 | } | |
cd80958d | 1440 | |
cf0bcb51 | 1441 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
cac3069d | 1442 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1443 | |
cac3069d | 1444 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1445 | sizeof(lsm.session.name)); |
1446 | ||
cac3069d | 1447 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1448 | } |
1df4dedd | 1449 | |
2ef84c95 | 1450 | /* |
9ae110e2 JG |
1451 | * All tracing will be stopped for registered events of the channel. |
1452 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1453 | */ |
cd80958d | 1454 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1455 | { |
cd80958d DG |
1456 | struct lttcomm_session_msg lsm; |
1457 | ||
9ae110e2 | 1458 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1459 | if (handle == NULL || name == NULL) { |
2f70b271 | 1460 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1461 | } |
1462 | ||
441c16a7 MD |
1463 | memset(&lsm, 0, sizeof(lsm)); |
1464 | ||
cd80958d | 1465 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1466 | |
cac3069d | 1467 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1468 | sizeof(lsm.u.disable.channel_name)); |
1469 | ||
cac3069d | 1470 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1471 | |
cac3069d | 1472 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1473 | sizeof(lsm.session.name)); |
1474 | ||
cac3069d | 1475 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1476 | } |
1477 | ||
ccf10263 | 1478 | /* |
9ae110e2 JG |
1479 | * Add PID to session tracker. |
1480 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1481 | */ |
1482 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1483 | { | |
1484 | struct lttcomm_session_msg lsm; | |
1485 | ||
9ae110e2 | 1486 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1487 | if (handle == NULL) { |
1488 | return -LTTNG_ERR_INVALID; | |
1489 | } | |
1490 | ||
1491 | memset(&lsm, 0, sizeof(lsm)); | |
1492 | ||
1493 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1494 | lsm.u.pid_tracker.pid = pid; | |
1495 | ||
1496 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1497 | ||
1498 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1499 | sizeof(lsm.session.name)); | |
1500 | ||
1501 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1502 | } | |
1503 | ||
1504 | /* | |
9ae110e2 JG |
1505 | * Remove PID from session tracker. |
1506 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1507 | */ |
1508 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1509 | { | |
1510 | struct lttcomm_session_msg lsm; | |
1511 | ||
9ae110e2 | 1512 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1513 | if (handle == NULL) { |
1514 | return -LTTNG_ERR_INVALID; | |
1515 | } | |
1516 | ||
1517 | memset(&lsm, 0, sizeof(lsm)); | |
1518 | ||
1519 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1520 | lsm.u.pid_tracker.pid = pid; | |
1521 | ||
1522 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1523 | ||
1524 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1525 | sizeof(lsm.session.name)); | |
1526 | ||
1527 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1528 | } | |
1529 | ||
fac6795d | 1530 | /* |
9ae110e2 JG |
1531 | * Lists all available tracepoints of domain. |
1532 | * Sets the contents of the events array. | |
1533 | * Returns the number of lttng_event entries in events; | |
1534 | * on error, returns a negative value. | |
fac6795d | 1535 | */ |
cd80958d | 1536 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1537 | struct lttng_event **events) |
fac6795d | 1538 | { |
052da939 | 1539 | int ret; |
cd80958d DG |
1540 | struct lttcomm_session_msg lsm; |
1541 | ||
9d697d3d | 1542 | if (handle == NULL) { |
2f70b271 | 1543 | return -LTTNG_ERR_INVALID; |
cd80958d | 1544 | } |
fac6795d | 1545 | |
53efb85a | 1546 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1547 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1548 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1549 | |
cac3069d | 1550 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1551 | if (ret < 0) { |
1552 | return ret; | |
eb354453 | 1553 | } |
fac6795d | 1554 | |
9f19cc17 | 1555 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1556 | } |
1557 | ||
f37d259d | 1558 | /* |
9ae110e2 JG |
1559 | * Lists all available tracepoint fields of domain. |
1560 | * Sets the contents of the event field array. | |
1561 | * Returns the number of lttng_event_field entries in events; | |
1562 | * on error, returns a negative value. | |
f37d259d MD |
1563 | */ |
1564 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1565 | struct lttng_event_field **fields) | |
1566 | { | |
1567 | int ret; | |
1568 | struct lttcomm_session_msg lsm; | |
1569 | ||
1570 | if (handle == NULL) { | |
2f70b271 | 1571 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1572 | } |
1573 | ||
53efb85a | 1574 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1575 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1576 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1577 | |
cac3069d | 1578 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1579 | if (ret < 0) { |
1580 | return ret; | |
1581 | } | |
1582 | ||
1583 | return ret / sizeof(struct lttng_event_field); | |
1584 | } | |
1585 | ||
834978fd | 1586 | /* |
9ae110e2 JG |
1587 | * Lists all available kernel system calls. Allocates and sets the contents of |
1588 | * the events array. | |
834978fd | 1589 | * |
9ae110e2 JG |
1590 | * Returns the number of lttng_event entries in events; on error, returns a |
1591 | * negative value. | |
834978fd DG |
1592 | */ |
1593 | int lttng_list_syscalls(struct lttng_event **events) | |
1594 | { | |
1595 | int ret; | |
1596 | struct lttcomm_session_msg lsm; | |
1597 | ||
1598 | if (!events) { | |
1599 | return -LTTNG_ERR_INVALID; | |
1600 | } | |
1601 | ||
1602 | memset(&lsm, 0, sizeof(lsm)); | |
1603 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1604 | /* Force kernel domain for system calls. */ | |
1605 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1606 | ||
1607 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1608 | if (ret < 0) { | |
1609 | return ret; | |
1610 | } | |
1611 | ||
1612 | return ret / sizeof(struct lttng_event); | |
1613 | } | |
1614 | ||
1657e9bb | 1615 | /* |
9ae110e2 JG |
1616 | * Returns a human readable string describing |
1617 | * the error code (a negative value). | |
1657e9bb | 1618 | */ |
9a745bc7 | 1619 | const char *lttng_strerror(int code) |
1657e9bb | 1620 | { |
f73fabfd | 1621 | return error_get_str(code); |
1657e9bb DG |
1622 | } |
1623 | ||
aaf97519 | 1624 | /* |
a4b92340 DG |
1625 | * Create a brand new session using name and url for destination. |
1626 | * | |
f73fabfd | 1627 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1628 | */ |
a4b92340 | 1629 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1630 | { |
3dd05a85 | 1631 | int ret; |
a4b92340 | 1632 | ssize_t size; |
00e2e675 | 1633 | struct lttcomm_session_msg lsm; |
a4b92340 | 1634 | struct lttng_uri *uris = NULL; |
00e2e675 | 1635 | |
a4b92340 | 1636 | if (name == NULL) { |
2f70b271 | 1637 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1638 | } |
1639 | ||
a4b92340 | 1640 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1641 | |
a4b92340 | 1642 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1643 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1644 | |
1645 | /* There should never be a data URL */ | |
bc894455 | 1646 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1647 | if (size < 0) { |
2f70b271 | 1648 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1649 | } |
1650 | ||
a4b92340 DG |
1651 | lsm.u.uri.size = size; |
1652 | ||
795a978d | 1653 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1654 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1655 | |
1656 | free(uris); | |
1657 | return ret; | |
00e2e675 DG |
1658 | } |
1659 | ||
8028d920 | 1660 | /* |
9ae110e2 JG |
1661 | * Destroy session using name. |
1662 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1663 | */ |
8fd2c92c | 1664 | static |
e20ee7c2 | 1665 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 1666 | { |
cd80958d DG |
1667 | struct lttcomm_session_msg lsm; |
1668 | ||
843f5df9 | 1669 | if (session_name == NULL) { |
2f70b271 | 1670 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1671 | } |
1672 | ||
53efb85a | 1673 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1674 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1675 | |
cac3069d DG |
1676 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1677 | sizeof(lsm.session.name)); | |
cd80958d | 1678 | |
cac3069d | 1679 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1680 | } |
1681 | ||
e20ee7c2 JD |
1682 | /* |
1683 | * Stop the session and wait for the data before destroying it | |
1684 | */ | |
1685 | int lttng_destroy_session(const char *session_name) | |
1686 | { | |
1687 | int ret; | |
1688 | ||
1689 | /* | |
1690 | * Stop the tracing and wait for the data. | |
1691 | */ | |
1692 | ret = _lttng_stop_tracing(session_name, 1); | |
1693 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1694 | goto end; | |
1695 | } | |
1696 | ||
1697 | ret = _lttng_destroy_session(session_name); | |
1698 | end: | |
1699 | return ret; | |
1700 | } | |
1701 | ||
1702 | /* | |
1703 | * Destroy the session without waiting for the data. | |
1704 | */ | |
1705 | int lttng_destroy_session_no_wait(const char *session_name) | |
1706 | { | |
1707 | int ret; | |
1708 | ||
1709 | /* | |
1710 | * Stop the tracing without waiting for the data. | |
1711 | * The session might already have been stopped, so just | |
1712 | * skip this error. | |
1713 | */ | |
1714 | ret = _lttng_stop_tracing(session_name, 0); | |
1715 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1716 | goto end; | |
1717 | } | |
1718 | ||
1719 | ret = _lttng_destroy_session(session_name); | |
1720 | end: | |
1721 | return ret; | |
1722 | } | |
1723 | ||
57167058 | 1724 | /* |
9ae110e2 JG |
1725 | * Ask the session daemon for all available sessions. |
1726 | * Sets the contents of the sessions array. | |
1727 | * Returns the number of lttng_session entries in sessions; | |
1728 | * on error, returns a negative value. | |
57167058 | 1729 | */ |
ca95a216 | 1730 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1731 | { |
ca95a216 | 1732 | int ret; |
cd80958d | 1733 | struct lttcomm_session_msg lsm; |
57167058 | 1734 | |
53efb85a | 1735 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1736 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1737 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1738 | if (ret < 0) { |
ca95a216 | 1739 | return ret; |
57167058 DG |
1740 | } |
1741 | ||
ca95a216 | 1742 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1743 | } |
1744 | ||
d7ba1388 MD |
1745 | int lttng_set_session_shm_path(const char *session_name, |
1746 | const char *shm_path) | |
1747 | { | |
1748 | struct lttcomm_session_msg lsm; | |
1749 | ||
1750 | if (session_name == NULL) { | |
1751 | return -LTTNG_ERR_INVALID; | |
1752 | } | |
1753 | ||
1754 | memset(&lsm, 0, sizeof(lsm)); | |
1755 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1756 | ||
1757 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1758 | sizeof(lsm.session.name)); | |
1759 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1760 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1761 | ||
1762 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1763 | } | |
1764 | ||
9f19cc17 | 1765 | /* |
9ae110e2 JG |
1766 | * Ask the session daemon for all available domains of a session. |
1767 | * Sets the contents of the domains array. | |
1768 | * Returns the number of lttng_domain entries in domains; | |
1769 | * on error, returns a negative value. | |
9f19cc17 | 1770 | */ |
330be774 | 1771 | int lttng_list_domains(const char *session_name, |
cd80958d | 1772 | struct lttng_domain **domains) |
9f19cc17 DG |
1773 | { |
1774 | int ret; | |
cd80958d DG |
1775 | struct lttcomm_session_msg lsm; |
1776 | ||
330be774 | 1777 | if (session_name == NULL) { |
2f70b271 | 1778 | return -LTTNG_ERR_INVALID; |
cd80958d | 1779 | } |
9f19cc17 | 1780 | |
53efb85a | 1781 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1782 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1783 | ||
cac3069d DG |
1784 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1785 | sizeof(lsm.session.name)); | |
cd80958d | 1786 | |
cac3069d | 1787 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1788 | if (ret < 0) { |
1789 | return ret; | |
1790 | } | |
1791 | ||
1792 | return ret / sizeof(struct lttng_domain); | |
1793 | } | |
1794 | ||
1795 | /* | |
9ae110e2 JG |
1796 | * Ask the session daemon for all available channels of a session. |
1797 | * Sets the contents of the channels array. | |
1798 | * Returns the number of lttng_channel entries in channels; | |
1799 | * on error, returns a negative value. | |
9f19cc17 | 1800 | */ |
cd80958d DG |
1801 | int lttng_list_channels(struct lttng_handle *handle, |
1802 | struct lttng_channel **channels) | |
9f19cc17 DG |
1803 | { |
1804 | int ret; | |
53e367f9 JG |
1805 | size_t channel_count, i; |
1806 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 1807 | sizeof(struct lttng_channel_extended); |
cd80958d | 1808 | struct lttcomm_session_msg lsm; |
53e367f9 | 1809 | void *extended_at; |
cd80958d | 1810 | |
9d697d3d | 1811 | if (handle == NULL) { |
53e367f9 JG |
1812 | ret = -LTTNG_ERR_INVALID; |
1813 | goto end; | |
cd80958d DG |
1814 | } |
1815 | ||
53efb85a | 1816 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1817 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1818 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1819 | sizeof(lsm.session.name)); |
9f19cc17 | 1820 | |
cac3069d | 1821 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1822 | |
cac3069d | 1823 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 1824 | if (ret < 0) { |
53e367f9 JG |
1825 | goto end; |
1826 | } | |
1827 | ||
1828 | if (ret % channel_size) { | |
1829 | ret = -LTTNG_ERR_UNK; | |
1830 | free(*channels); | |
1831 | *channels = NULL; | |
1832 | goto end; | |
9f19cc17 | 1833 | } |
53e367f9 | 1834 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 1835 | |
53e367f9 JG |
1836 | /* Set extended info pointers */ |
1837 | extended_at = ((void *) *channels) + | |
1838 | channel_count * sizeof(struct lttng_channel); | |
1839 | for (i = 0; i < channel_count; i++) { | |
1840 | struct lttng_channel *chan = &(*channels)[i]; | |
1841 | ||
1842 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 1843 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
1844 | } |
1845 | ||
1846 | ret = (int) channel_count; | |
1847 | end: | |
1848 | return ret; | |
9f19cc17 DG |
1849 | } |
1850 | ||
1851 | /* | |
9ae110e2 JG |
1852 | * Ask the session daemon for all available events of a session channel. |
1853 | * Sets the contents of the events array. | |
1854 | * Returns the number of lttng_event entries in events; | |
1855 | * on error, returns a negative value. | |
9f19cc17 | 1856 | */ |
cd80958d DG |
1857 | int lttng_list_events(struct lttng_handle *handle, |
1858 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1859 | { |
1860 | int ret; | |
cd80958d | 1861 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
1862 | struct lttcomm_event_command_header *cmd_header = NULL; |
1863 | size_t cmd_header_len; | |
1864 | uint32_t nb_events, i; | |
1865 | void *extended_at; | |
9f19cc17 | 1866 | |
9d697d3d DG |
1867 | /* Safety check. An handle and channel name are mandatory */ |
1868 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1869 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1870 | } |
1871 | ||
53efb85a | 1872 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1873 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1874 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1875 | sizeof(lsm.session.name)); |
cac3069d | 1876 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 1877 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 1878 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1879 | |
b4e3ceb9 PP |
1880 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, NULL, 0, (void **) events, |
1881 | (void **) &cmd_header, &cmd_header_len); | |
9f19cc17 | 1882 | if (ret < 0) { |
b4e3ceb9 | 1883 | goto error; |
9f19cc17 DG |
1884 | } |
1885 | ||
b4e3ceb9 PP |
1886 | /* Set number of events and free command header */ |
1887 | nb_events = cmd_header->nb_events; | |
1888 | if (nb_events > INT_MAX) { | |
1889 | ret = -EOVERFLOW; | |
1890 | goto error; | |
1891 | } | |
1892 | ret = (int) nb_events; | |
1893 | free(cmd_header); | |
1894 | cmd_header = NULL; | |
1895 | ||
1896 | /* Set extended info pointers */ | |
1897 | extended_at = ((void*) (*events)) + | |
1898 | nb_events * sizeof(struct lttng_event); | |
1899 | ||
1900 | for (i = 0; i < nb_events; i++) { | |
1901 | struct lttcomm_event_extended_header *ext_header; | |
1902 | struct lttng_event *event = &(*events)[i]; | |
1903 | ||
1904 | event->extended.ptr = extended_at; | |
1905 | ext_header = | |
1906 | (struct lttcomm_event_extended_header *) extended_at; | |
1907 | extended_at += sizeof(*ext_header); | |
1908 | extended_at += ext_header->filter_len; | |
795d57ce PP |
1909 | extended_at += |
1910 | ext_header->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
b4e3ceb9 PP |
1911 | } |
1912 | ||
1913 | return ret; | |
1914 | error: | |
1915 | free(cmd_header); | |
1916 | free(*events); | |
1917 | return ret; | |
9f19cc17 DG |
1918 | } |
1919 | ||
134e72ed JG |
1920 | int lttng_event_get_filter_expression(struct lttng_event *event, |
1921 | const char **filter_expression) | |
d31d3e8c PP |
1922 | { |
1923 | int ret = 0; | |
1924 | struct lttcomm_event_extended_header *ext_header; | |
1925 | ||
134e72ed | 1926 | if (!event || !filter_expression) { |
d31d3e8c PP |
1927 | ret = -LTTNG_ERR_INVALID; |
1928 | goto end; | |
1929 | } | |
1930 | ||
1931 | ext_header = event->extended.ptr; | |
1932 | ||
1933 | if (!ext_header) { | |
1934 | /* | |
1935 | * This can happen since the lttng_event structure is | |
1936 | * used for other tasks where this pointer is never set. | |
1937 | */ | |
134e72ed | 1938 | *filter_expression = NULL; |
d31d3e8c PP |
1939 | goto end; |
1940 | } | |
1941 | ||
1942 | if (ext_header->filter_len) { | |
134e72ed JG |
1943 | *filter_expression = ((const char *) (ext_header)) + |
1944 | sizeof(*ext_header); | |
d31d3e8c | 1945 | } else { |
134e72ed | 1946 | *filter_expression = NULL; |
d31d3e8c PP |
1947 | } |
1948 | ||
1949 | end: | |
1950 | return ret; | |
1951 | } | |
b4e3ceb9 | 1952 | |
f086e50e PP |
1953 | int lttng_event_get_exclusion_name_count(struct lttng_event *event) |
1954 | { | |
1955 | int ret; | |
1956 | struct lttcomm_event_extended_header *ext_header; | |
1957 | ||
1958 | if (!event) { | |
1959 | ret = -LTTNG_ERR_INVALID; | |
1960 | goto end; | |
1961 | } | |
1962 | ||
1963 | ext_header = event->extended.ptr; | |
1964 | if (!ext_header) { | |
1965 | /* | |
1966 | * This can happen since the lttng_event structure is | |
1967 | * used for other tasks where this pointer is never set. | |
1968 | */ | |
1969 | ret = 0; | |
1970 | goto end; | |
1971 | } | |
1972 | ||
1973 | if (ext_header->nb_exclusions > INT_MAX) { | |
1974 | ret = -LTTNG_ERR_OVERFLOW; | |
1975 | goto end; | |
1976 | } | |
1977 | ret = (int) ext_header->nb_exclusions; | |
1978 | end: | |
1979 | return ret; | |
1980 | } | |
1981 | ||
1982 | int lttng_event_get_exclusion_name(struct lttng_event *event, | |
1983 | size_t index, const char **exclusion_name) | |
1984 | { | |
1985 | int ret = 0; | |
1986 | struct lttcomm_event_extended_header *ext_header; | |
1987 | void *at; | |
1988 | ||
1989 | if (!event || !exclusion_name) { | |
1990 | ret = -LTTNG_ERR_INVALID; | |
1991 | goto end; | |
1992 | } | |
1993 | ||
1994 | ext_header = event->extended.ptr; | |
1995 | if (!ext_header) { | |
1996 | ret = -LTTNG_ERR_INVALID; | |
1997 | goto end; | |
1998 | } | |
1999 | ||
2000 | if (index >= ext_header->nb_exclusions) { | |
2001 | ret = -LTTNG_ERR_INVALID; | |
2002 | goto end; | |
2003 | } | |
2004 | ||
2005 | at = (void *) ext_header + sizeof(*ext_header); | |
2006 | at += ext_header->filter_len; | |
2007 | at += index * LTTNG_SYMBOL_NAME_LEN; | |
2008 | *exclusion_name = at; | |
2009 | ||
2010 | end: | |
2011 | return ret; | |
2012 | } | |
2013 | ||
fac6795d | 2014 | /* |
1c8d13c8 TD |
2015 | * Sets the tracing_group variable with name. |
2016 | * This function allocates memory pointed to by tracing_group. | |
2017 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2018 | */ |
2019 | int lttng_set_tracing_group(const char *name) | |
2020 | { | |
9d697d3d | 2021 | if (name == NULL) { |
2f70b271 | 2022 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2023 | } |
2024 | ||
fac6795d | 2025 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2026 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2027 | } |
2028 | ||
2029 | return 0; | |
2030 | } | |
2031 | ||
cd80958d | 2032 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2033 | struct lttng_calibrate *calibrate) |
2034 | { | |
b812e5ca PP |
2035 | /* |
2036 | * This command was removed in LTTng 2.9. | |
2037 | */ | |
2038 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2039 | } |
2040 | ||
5edd7e09 DG |
2041 | /* |
2042 | * Set default channel attributes. | |
441c16a7 | 2043 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2044 | */ |
2045 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2046 | struct lttng_channel_attr *attr) | |
2047 | { | |
7955af2d | 2048 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2049 | |
5edd7e09 DG |
2050 | /* Safety check */ |
2051 | if (attr == NULL || domain == NULL) { | |
2052 | return; | |
2053 | } | |
2054 | ||
7955af2d | 2055 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2056 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2057 | ||
0a9c6494 DG |
2058 | /* Same for all domains. */ |
2059 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2060 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2061 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2062 | ||
5edd7e09 DG |
2063 | switch (domain->type) { |
2064 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2065 | attr->switch_timer_interval = |
2066 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2067 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2068 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2069 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2070 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2071 | if (extended) { |
2072 | extended->monitor_timer_interval = | |
2073 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
f515d318 MD |
2074 | extended->blocking_timeout = |
2075 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2076 | } |
5edd7e09 DG |
2077 | break; |
2078 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2079 | switch (domain->buf_type) { |
2080 | case LTTNG_BUFFER_PER_UID: | |
2081 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2082 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2083 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2084 | attr->switch_timer_interval = |
2085 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2086 | attr->read_timer_interval = | |
2087 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2088 | if (extended) { |
2089 | extended->monitor_timer_interval = | |
2090 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
f515d318 MD |
2091 | extended->blocking_timeout = |
2092 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2093 | } |
0a9c6494 DG |
2094 | break; |
2095 | case LTTNG_BUFFER_PER_PID: | |
2096 | default: | |
2097 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2098 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2099 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2100 | attr->switch_timer_interval = |
2101 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2102 | attr->read_timer_interval = | |
2103 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2104 | if (extended) { |
2105 | extended->monitor_timer_interval = | |
2106 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
f515d318 MD |
2107 | extended->blocking_timeout = |
2108 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2109 | } |
0a9c6494 DG |
2110 | break; |
2111 | } | |
5edd7e09 | 2112 | default: |
441c16a7 | 2113 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2114 | break; |
2115 | } | |
cf0bcb51 JG |
2116 | |
2117 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2118 | } |
2119 | ||
5ba3702f JG |
2120 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2121 | uint64_t *discarded_events) | |
2122 | { | |
2123 | int ret = 0; | |
cf0bcb51 | 2124 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2125 | |
2126 | if (!channel || !discarded_events) { | |
2127 | ret = -LTTNG_ERR_INVALID; | |
2128 | goto end; | |
2129 | } | |
2130 | ||
2131 | chan_ext = channel->attr.extended.ptr; | |
2132 | if (!chan_ext) { | |
2133 | /* | |
2134 | * This can happen since the lttng_channel structure is | |
2135 | * used for other tasks where this pointer is never set. | |
2136 | */ | |
2137 | *discarded_events = 0; | |
2138 | goto end; | |
2139 | } | |
2140 | ||
2141 | *discarded_events = chan_ext->discarded_events; | |
2142 | end: | |
2143 | return ret; | |
2144 | } | |
2145 | ||
2146 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2147 | uint64_t *lost_packets) | |
2148 | { | |
2149 | int ret = 0; | |
cf0bcb51 | 2150 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2151 | |
2152 | if (!channel || !lost_packets) { | |
2153 | ret = -LTTNG_ERR_INVALID; | |
2154 | goto end; | |
2155 | } | |
2156 | ||
2157 | chan_ext = channel->attr.extended.ptr; | |
2158 | if (!chan_ext) { | |
2159 | /* | |
2160 | * This can happen since the lttng_channel structure is | |
2161 | * used for other tasks where this pointer is never set. | |
2162 | */ | |
2163 | *lost_packets = 0; | |
2164 | goto end; | |
2165 | } | |
2166 | ||
2167 | *lost_packets = chan_ext->lost_packets; | |
2168 | end: | |
2169 | return ret; | |
2170 | } | |
2171 | ||
cf0bcb51 JG |
2172 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2173 | uint64_t *monitor_timer_interval) | |
2174 | { | |
2175 | int ret = 0; | |
2176 | ||
2177 | if (!chan || !monitor_timer_interval) { | |
2178 | ret = -LTTNG_ERR_INVALID; | |
2179 | goto end; | |
2180 | } | |
2181 | ||
2182 | if (!chan->attr.extended.ptr) { | |
2183 | ret = -LTTNG_ERR_INVALID; | |
2184 | goto end; | |
2185 | } | |
2186 | ||
2187 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2188 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2189 | end: | |
2190 | return ret; | |
2191 | } | |
2192 | ||
2193 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2194 | uint64_t monitor_timer_interval) | |
2195 | { | |
2196 | int ret = 0; | |
2197 | ||
2198 | if (!chan || !chan->attr.extended.ptr) { | |
2199 | ret = -LTTNG_ERR_INVALID; | |
2200 | goto end; | |
2201 | } | |
2202 | ||
2203 | ((struct lttng_channel_extended *) | |
2204 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2205 | monitor_timer_interval; | |
2206 | end: | |
2207 | return ret; | |
2208 | } | |
2209 | ||
f515d318 MD |
2210 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2211 | int64_t *blocking_timeout) | |
2212 | { | |
2213 | int ret = 0; | |
2214 | ||
2215 | if (!chan || !blocking_timeout) { | |
2216 | ret = -LTTNG_ERR_INVALID; | |
2217 | goto end; | |
2218 | } | |
2219 | ||
2220 | if (!chan->attr.extended.ptr) { | |
2221 | ret = -LTTNG_ERR_INVALID; | |
2222 | goto end; | |
2223 | } | |
2224 | ||
2225 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2226 | chan->attr.extended.ptr)->blocking_timeout; | |
2227 | end: | |
2228 | return ret; | |
2229 | } | |
2230 | ||
2231 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2232 | int64_t blocking_timeout) | |
2233 | { | |
2234 | int ret = 0; | |
2235 | int64_t msec_timeout; | |
2236 | ||
2237 | if (!chan || !chan->attr.extended.ptr) { | |
2238 | ret = -LTTNG_ERR_INVALID; | |
2239 | goto end; | |
2240 | } | |
2241 | ||
2242 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2243 | ret = -LTTNG_ERR_INVALID; | |
2244 | goto end; | |
2245 | } | |
2246 | ||
2247 | /* | |
2248 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2249 | * us to accept a narrower range of values (msecs expressed as a signed | |
2250 | * 32-bit integer). | |
2251 | */ | |
2252 | msec_timeout = blocking_timeout / 1000; | |
2253 | if (msec_timeout != (int32_t) msec_timeout) { | |
2254 | ret = -LTTNG_ERR_INVALID; | |
2255 | goto end; | |
2256 | } | |
2257 | ||
2258 | ((struct lttng_channel_extended *) | |
2259 | chan->attr.extended.ptr)->blocking_timeout = | |
2260 | blocking_timeout; | |
2261 | end: | |
2262 | return ret; | |
2263 | } | |
2264 | ||
fac6795d | 2265 | /* |
2269e89e | 2266 | * Check if session daemon is alive. |
fac6795d | 2267 | * |
2269e89e | 2268 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2269 | * On error returns a negative value. |
fac6795d | 2270 | */ |
947308c4 | 2271 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2272 | { |
2273 | int ret; | |
2274 | ||
2275 | ret = set_session_daemon_path(); | |
2276 | if (ret < 0) { | |
9ae110e2 | 2277 | /* Error. */ |
fac6795d DG |
2278 | return ret; |
2279 | } | |
2280 | ||
9d035200 | 2281 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2282 | /* |
9ae110e2 JG |
2283 | * No socket path set. Weird error which means the constructor |
2284 | * was not called. | |
2f70b271 DG |
2285 | */ |
2286 | assert(0); | |
fac6795d DG |
2287 | } |
2288 | ||
2269e89e | 2289 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2290 | if (ret < 0) { |
9ae110e2 | 2291 | /* Not alive. */ |
7d8234d9 MD |
2292 | return 0; |
2293 | } | |
7d8234d9 | 2294 | |
9ae110e2 | 2295 | /* Is alive. */ |
947308c4 | 2296 | return 1; |
fac6795d DG |
2297 | } |
2298 | ||
00e2e675 | 2299 | /* |
a4b92340 | 2300 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2301 | * |
2302 | * Return 0 on success, else a negative value. | |
2303 | */ | |
a4b92340 DG |
2304 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2305 | const char *control_url, const char *data_url) | |
00e2e675 | 2306 | { |
3dd05a85 | 2307 | int ret; |
a4b92340 | 2308 | ssize_t size; |
00e2e675 | 2309 | struct lttcomm_session_msg lsm; |
a4b92340 | 2310 | struct lttng_uri *uris = NULL; |
00e2e675 | 2311 | |
a4b92340 | 2312 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2313 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2314 | } |
2315 | ||
a4b92340 DG |
2316 | memset(&lsm, 0, sizeof(lsm)); |
2317 | ||
00e2e675 DG |
2318 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2319 | ||
cac3069d | 2320 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2321 | sizeof(lsm.session.name)); |
cac3069d | 2322 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2323 | |
bc894455 | 2324 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2325 | if (size < 0) { |
2f70b271 | 2326 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2327 | } |
2328 | ||
2329 | lsm.u.uri.size = size; | |
00e2e675 | 2330 | |
795a978d | 2331 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2332 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2333 | |
2334 | free(uris); | |
2335 | return ret; | |
00e2e675 DG |
2336 | } |
2337 | ||
2338 | /* | |
9c6bda17 | 2339 | * [OBSOLETE] |
00e2e675 DG |
2340 | */ |
2341 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2342 | { | |
785d2d0d | 2343 | return -ENOSYS; |
00e2e675 DG |
2344 | } |
2345 | ||
2346 | /* | |
9c6bda17 | 2347 | * [OBSOLETE] |
00e2e675 DG |
2348 | */ |
2349 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2350 | { | |
785d2d0d | 2351 | return -ENOSYS; |
00e2e675 DG |
2352 | } |
2353 | ||
07424f16 DG |
2354 | /* |
2355 | * This is an extension of create session that is ONLY and SHOULD only be used | |
2356 | * by the lttng command line program. It exists to avoid using URI parsing in | |
2357 | * the lttng client. | |
2358 | * | |
2359 | * We need the date and time for the trace path subdirectory for the case where | |
2360 | * the user does NOT define one using either -o or -U. Using the normal | |
2361 | * lttng_create_session API call, we have no clue on the session daemon side if | |
2362 | * the URL was generated automatically by the client or define by the user. | |
2363 | * | |
2364 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
2365 | * string and appends it if necessary to the URI subdirectory before sending it | |
2366 | * to the session daemon. | |
2367 | * | |
2368 | * With this extra function, the lttng_create_session call behavior is not | |
2369 | * changed and the timestamp is appended to the URI on the session daemon side | |
2370 | * if necessary. | |
2371 | */ | |
2372 | int _lttng_create_session_ext(const char *name, const char *url, | |
2373 | const char *datetime) | |
2374 | { | |
3dd05a85 | 2375 | int ret; |
07424f16 DG |
2376 | ssize_t size; |
2377 | struct lttcomm_session_msg lsm; | |
2378 | struct lttng_uri *uris = NULL; | |
2379 | ||
2bba9e53 | 2380 | if (name == NULL || datetime == NULL) { |
2f70b271 | 2381 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
2382 | } |
2383 | ||
2384 | memset(&lsm, 0, sizeof(lsm)); | |
2385 | ||
2386 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 2387 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 | 2388 | |
9ae110e2 | 2389 | /* There should never be a data URL. */ |
bc894455 | 2390 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 2391 | if (size < 0) { |
3dd05a85 DG |
2392 | ret = -LTTNG_ERR_INVALID; |
2393 | goto error; | |
07424f16 DG |
2394 | } |
2395 | ||
2396 | lsm.u.uri.size = size; | |
2397 | ||
4b35a6b3 | 2398 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
2399 | /* Don't append datetime if the name was automatically created. */ |
2400 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
2401 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
2402 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
2403 | name, datetime); | |
2404 | } else { | |
2405 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2406 | } | |
07424f16 DG |
2407 | if (ret < 0) { |
2408 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
2409 | ret = -LTTNG_ERR_FATAL; |
2410 | goto error; | |
07424f16 DG |
2411 | } |
2412 | } | |
2413 | ||
795a978d | 2414 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2415 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2416 | |
2417 | error: | |
2418 | free(uris); | |
2419 | return ret; | |
07424f16 DG |
2420 | } |
2421 | ||
806e2684 DG |
2422 | /* |
2423 | * For a given session name, this call checks if the data is ready to be read | |
2424 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2425 | * any readers. | |
2426 | */ | |
6d805429 | 2427 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2428 | { |
2429 | int ret; | |
2430 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2431 | uint8_t *pending = NULL; |
806e2684 DG |
2432 | |
2433 | if (session_name == NULL) { | |
2434 | return -LTTNG_ERR_INVALID; | |
2435 | } | |
2436 | ||
53efb85a | 2437 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2438 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2439 | |
cac3069d DG |
2440 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2441 | sizeof(lsm.session.name)); | |
806e2684 | 2442 | |
f6151c55 JG |
2443 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2444 | if (ret < 0) { | |
2445 | goto end; | |
2446 | } else if (ret != 1) { | |
2447 | /* Unexpected payload size */ | |
2448 | ret = -LTTNG_ERR_INVALID; | |
2449 | goto end; | |
607d6ef9 JG |
2450 | } else if (!pending) { |
2451 | /* Internal error. */ | |
2452 | ret = -LTTNG_ERR_UNK; | |
2453 | goto end; | |
806e2684 DG |
2454 | } |
2455 | ||
f6151c55 JG |
2456 | ret = (int) *pending; |
2457 | end: | |
2458 | free(pending); | |
806e2684 DG |
2459 | return ret; |
2460 | } | |
2461 | ||
27babd3a DG |
2462 | /* |
2463 | * Create a session exclusively used for snapshot. | |
2464 | * | |
2465 | * Returns LTTNG_OK on success or a negative error code. | |
2466 | */ | |
2467 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2468 | { | |
2469 | int ret; | |
2470 | ssize_t size; | |
2471 | struct lttcomm_session_msg lsm; | |
2472 | struct lttng_uri *uris = NULL; | |
2473 | ||
2474 | if (name == NULL) { | |
2475 | return -LTTNG_ERR_INVALID; | |
2476 | } | |
2477 | ||
2478 | memset(&lsm, 0, sizeof(lsm)); | |
2479 | ||
2480 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
2481 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2482 | ||
2483 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2484 | if (size < 0) { | |
2485 | return -LTTNG_ERR_INVALID; | |
2486 | } | |
2487 | ||
2488 | lsm.u.uri.size = size; | |
2489 | ||
795a978d | 2490 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
27babd3a DG |
2491 | sizeof(struct lttng_uri) * size, NULL); |
2492 | ||
2493 | free(uris); | |
2494 | return ret; | |
2495 | } | |
2496 | ||
ecc48a90 JD |
2497 | /* |
2498 | * Create a session exclusively used for live. | |
2499 | * | |
2500 | * Returns LTTNG_OK on success or a negative error code. | |
2501 | */ | |
2502 | int lttng_create_session_live(const char *name, const char *url, | |
2503 | unsigned int timer_interval) | |
2504 | { | |
2505 | int ret; | |
2506 | ssize_t size; | |
2507 | struct lttcomm_session_msg lsm; | |
2508 | struct lttng_uri *uris = NULL; | |
2509 | ||
92805ee4 | 2510 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
2511 | return -LTTNG_ERR_INVALID; |
2512 | } | |
2513 | ||
2514 | memset(&lsm, 0, sizeof(lsm)); | |
2515 | ||
2516 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
2517 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2518 | ||
1a241656 DG |
2519 | if (url) { |
2520 | size = uri_parse_str_urls(url, NULL, &uris); | |
2521 | if (size <= 0) { | |
2522 | ret = -LTTNG_ERR_INVALID; | |
2523 | goto end; | |
2524 | } | |
ecc48a90 | 2525 | |
1a241656 DG |
2526 | /* file:// is not accepted for live session. */ |
2527 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
2528 | ret = -LTTNG_ERR_INVALID; | |
2529 | goto end; | |
2530 | } | |
2531 | } else { | |
2532 | size = 0; | |
ecc48a90 JD |
2533 | } |
2534 | ||
2535 | lsm.u.session_live.nb_uri = size; | |
2536 | lsm.u.session_live.timer_interval = timer_interval; | |
2537 | ||
795a978d | 2538 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
ecc48a90 JD |
2539 | sizeof(struct lttng_uri) * size, NULL); |
2540 | ||
2541 | end: | |
2542 | free(uris); | |
2543 | return ret; | |
2544 | } | |
2545 | ||
a5dfbb9d MD |
2546 | /* |
2547 | * List PIDs in the tracker. | |
2548 | * | |
1b18ce93 JG |
2549 | * enabled is set to whether the PID tracker is enabled. |
2550 | * pids is set to an allocated array of PIDs currently tracked. On | |
2551 | * success, pids must be freed by the caller. | |
2552 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2553 | * |
2554 | * Returns 0 on success, else a negative LTTng error code. | |
2555 | */ | |
2556 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2557 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2558 | { | |
ebbf5ab7 JR |
2559 | int ret; |
2560 | int enabled = 1; | |
a5dfbb9d MD |
2561 | struct lttcomm_session_msg lsm; |
2562 | size_t nr_pids; | |
72592aa4 | 2563 | int32_t *pids = NULL; |
a5dfbb9d MD |
2564 | |
2565 | if (handle == NULL) { | |
2566 | return -LTTNG_ERR_INVALID; | |
2567 | } | |
2568 | ||
2569 | memset(&lsm, 0, sizeof(lsm)); | |
2570 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2571 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2572 | sizeof(lsm.session.name)); | |
2573 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2574 | ||
2575 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2576 | if (ret < 0) { | |
2577 | return ret; | |
2578 | } | |
2579 | nr_pids = ret / sizeof(int32_t); | |
66de3f4d JG |
2580 | if (nr_pids > 0 && !pids) { |
2581 | return -LTTNG_ERR_UNK; | |
2582 | } | |
a5dfbb9d MD |
2583 | if (nr_pids == 1 && pids[0] == -1) { |
2584 | free(pids); | |
2585 | pids = NULL; | |
2586 | enabled = 0; | |
2587 | nr_pids = 0; | |
2588 | } | |
2589 | *_enabled = enabled; | |
2590 | *_pids = pids; | |
2591 | *_nr_pids = nr_pids; | |
2592 | return 0; | |
2593 | } | |
2594 | ||
93ec662e JD |
2595 | /* |
2596 | * Regenerate the metadata for a session. | |
2597 | * Return 0 on success, a negative error code on error. | |
2598 | */ | |
eded6438 | 2599 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2600 | { |
2601 | int ret; | |
2602 | struct lttcomm_session_msg lsm; | |
2603 | ||
2604 | if (!session_name) { | |
2605 | ret = -LTTNG_ERR_INVALID; | |
2606 | goto end; | |
2607 | } | |
2608 | ||
2609 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2610 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2611 | |
2612 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2613 | sizeof(lsm.session.name)); | |
2614 | ||
2615 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2616 | if (ret < 0) { | |
2617 | goto end; | |
2618 | } | |
2619 | ||
2620 | ret = 0; | |
2621 | end: | |
2622 | return ret; | |
2623 | } | |
2624 | ||
eded6438 JD |
2625 | /* |
2626 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2627 | */ | |
2628 | int lttng_metadata_regenerate(const char *session_name) | |
2629 | { | |
2630 | return lttng_regenerate_metadata(session_name); | |
2631 | } | |
2632 | ||
c2561365 JD |
2633 | /* |
2634 | * Regenerate the statedump of a session. | |
2635 | * Return 0 on success, a negative error code on error. | |
2636 | */ | |
2637 | int lttng_regenerate_statedump(const char *session_name) | |
2638 | { | |
2639 | int ret; | |
2640 | struct lttcomm_session_msg lsm; | |
2641 | ||
2642 | if (!session_name) { | |
2643 | ret = -LTTNG_ERR_INVALID; | |
2644 | goto end; | |
2645 | } | |
2646 | ||
2647 | memset(&lsm, 0, sizeof(lsm)); | |
2648 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2649 | ||
2650 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2651 | sizeof(lsm.session.name)); | |
2652 | ||
2653 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2654 | if (ret < 0) { | |
2655 | goto end; | |
2656 | } | |
2657 | ||
2658 | ret = 0; | |
2659 | end: | |
2660 | return ret; | |
2661 | } | |
2662 | ||
a58c490f JG |
2663 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2664 | { | |
2665 | int ret; | |
2666 | struct lttcomm_session_msg lsm; | |
2667 | char *trigger_buf = NULL; | |
2668 | ssize_t trigger_size; | |
2669 | ||
2670 | if (!trigger) { | |
2671 | ret = -LTTNG_ERR_INVALID; | |
2672 | goto end; | |
2673 | } | |
2674 | ||
2675 | if (!lttng_trigger_validate(trigger)) { | |
0bf690bb | 2676 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2677 | goto end; |
2678 | } | |
2679 | ||
2680 | trigger_size = lttng_trigger_serialize(trigger, NULL); | |
2681 | if (trigger_size < 0) { | |
2682 | ret = -LTTNG_ERR_UNK; | |
2683 | goto end; | |
2684 | } | |
2685 | ||
2686 | trigger_buf = zmalloc(trigger_size); | |
2687 | if (!trigger_buf) { | |
2688 | ret = -LTTNG_ERR_NOMEM; | |
2689 | goto end; | |
2690 | } | |
2691 | ||
2692 | memset(&lsm, 0, sizeof(lsm)); | |
2693 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
2694 | if (lttng_trigger_serialize(trigger, trigger_buf) < 0) { | |
2695 | ret = -LTTNG_ERR_UNK; | |
2696 | goto end; | |
2697 | } | |
2698 | ||
2699 | lsm.u.trigger.length = (uint32_t) trigger_size; | |
2700 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, trigger_buf, | |
2701 | trigger_size, NULL); | |
2702 | end: | |
2703 | free(trigger_buf); | |
2704 | return ret; | |
2705 | } | |
2706 | ||
2707 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
2708 | { | |
2709 | int ret; | |
2710 | struct lttcomm_session_msg lsm; | |
2711 | char *trigger_buf = NULL; | |
2712 | ssize_t trigger_size; | |
2713 | ||
2714 | if (!trigger) { | |
2715 | ret = -LTTNG_ERR_INVALID; | |
2716 | goto end; | |
2717 | } | |
2718 | ||
2719 | if (!lttng_trigger_validate(trigger)) { | |
2720 | ret = -LTTNG_ERR_INVALID; | |
2721 | goto end; | |
2722 | } | |
2723 | ||
2724 | trigger_size = lttng_trigger_serialize(trigger, NULL); | |
2725 | if (trigger_size < 0) { | |
2726 | ret = -LTTNG_ERR_UNK; | |
2727 | goto end; | |
2728 | } | |
2729 | ||
2730 | trigger_buf = zmalloc(trigger_size); | |
2731 | if (!trigger_buf) { | |
2732 | ret = -LTTNG_ERR_NOMEM; | |
2733 | goto end; | |
2734 | } | |
2735 | ||
2736 | memset(&lsm, 0, sizeof(lsm)); | |
2737 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
2738 | if (lttng_trigger_serialize(trigger, trigger_buf) < 0) { | |
2739 | ret = -LTTNG_ERR_UNK; | |
2740 | goto end; | |
2741 | } | |
2742 | ||
2743 | lsm.u.trigger.length = (uint32_t) trigger_size; | |
2744 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, trigger_buf, | |
2745 | trigger_size, NULL); | |
2746 | end: | |
2747 | free(trigger_buf); | |
2748 | return ret; | |
2749 | } | |
2750 | ||
fac6795d | 2751 | /* |
9ae110e2 | 2752 | * lib constructor. |
fac6795d | 2753 | */ |
b2b89e8a | 2754 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
2755 | { |
2756 | /* Set default session group */ | |
bbccc3d2 | 2757 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2758 | } |
49cca668 DG |
2759 | |
2760 | /* | |
9ae110e2 | 2761 | * lib destructor. |
49cca668 | 2762 | */ |
b2b89e8a | 2763 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
2764 | { |
2765 | free(tracing_group); | |
2766 | } |