Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
2001793c | 7 | * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
d14d33bf AM |
9 | * This library is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
11 | * as published by the Free Software Foundation. | |
82a3637f DG |
12 | * |
13 | * This library is distributed in the hope that it will be useful, | |
fac6795d | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
82a3637f DG |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. | |
17 | * | |
d14d33bf AM |
18 | * You should have received a copy of the GNU Lesser General Public License |
19 | * along with this library; if not, write to the Free Software Foundation, | |
20 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
fac6795d DG |
21 | */ |
22 | ||
6c1c0768 | 23 | #define _LGPL_SOURCE |
44a5e5eb | 24 | #include <assert.h> |
fac6795d | 25 | #include <grp.h> |
1e307fab | 26 | #include <errno.h> |
fac6795d DG |
27 | #include <stdio.h> |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #include <unistd.h> | |
31 | ||
990570ed DG |
32 | #include <common/common.h> |
33 | #include <common/defaults.h> | |
db758600 | 34 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 35 | #include <common/uri.h> |
feb0f3e5 | 36 | #include <common/utils.h> |
de453daa | 37 | #include <common/dynamic-buffer.h> |
1e307fab | 38 | #include <lttng/lttng.h> |
0c89d795 | 39 | #include <lttng/health-internal.h> |
a58c490f JG |
40 | #include <lttng/trigger/trigger-internal.h> |
41 | #include <lttng/endpoint.h> | |
42 | #include <lttng/channel-internal.h> | |
de453daa | 43 | #include <lttng/event-internal.h> |
fac6795d | 44 | |
d00c599e DG |
45 | #include "filter/filter-ast.h" |
46 | #include "filter/filter-parser.h" | |
47 | #include "filter/filter-bytecode.h" | |
48 | #include "filter/memstream.h" | |
cac3069d | 49 | #include "lttng-ctl-helper.h" |
53a80697 MD |
50 | |
51 | #ifdef DEBUG | |
d00c599e | 52 | static const int print_xml = 1; |
53a80697 MD |
53 | #define dbg_printf(fmt, args...) \ |
54 | printf("[debug liblttng-ctl] " fmt, ## args) | |
55 | #else | |
d00c599e | 56 | static const int print_xml = 0; |
53a80697 MD |
57 | #define dbg_printf(fmt, args...) \ |
58 | do { \ | |
59 | /* do nothing but check printf format */ \ | |
60 | if (0) \ | |
61 | printf("[debug liblttnctl] " fmt, ## args); \ | |
62 | } while (0) | |
63 | #endif | |
64 | ||
65 | ||
fac6795d DG |
66 | /* Socket to session daemon for communication */ |
67 | static int sessiond_socket; | |
68 | static char sessiond_sock_path[PATH_MAX]; | |
69 | ||
fac6795d DG |
70 | /* Variables */ |
71 | static char *tracing_group; | |
72 | static int connected; | |
73 | ||
97e19046 DG |
74 | /* Global */ |
75 | ||
76 | /* | |
77 | * Those two variables are used by error.h to silent or control the verbosity of | |
78 | * error message. They are global to the library so application linking with it | |
79 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
80 | */ |
81 | int lttng_opt_quiet; | |
82 | int lttng_opt_verbose; | |
c7e35b03 | 83 | int lttng_opt_mi; |
97e19046 | 84 | |
99497cd0 MD |
85 | /* |
86 | * Copy string from src to dst and enforce null terminated byte. | |
87 | */ | |
cac3069d DG |
88 | LTTNG_HIDDEN |
89 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 90 | { |
e7d6716d | 91 | if (src && dst) { |
99497cd0 MD |
92 | strncpy(dst, src, len); |
93 | /* Enforce the NULL terminated byte */ | |
94 | dst[len - 1] = '\0'; | |
cd80958d DG |
95 | } else if (dst) { |
96 | dst[0] = '\0'; | |
99497cd0 MD |
97 | } |
98 | } | |
99 | ||
fac6795d | 100 | /* |
cd80958d | 101 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 102 | * |
cd80958d DG |
103 | * If domain is unknown, default domain will be the kernel. |
104 | */ | |
cac3069d DG |
105 | LTTNG_HIDDEN |
106 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
107 | struct lttng_domain *src) | |
cd80958d DG |
108 | { |
109 | if (src && dst) { | |
110 | switch (src->type) { | |
00e2e675 DG |
111 | case LTTNG_DOMAIN_KERNEL: |
112 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 113 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 114 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 115 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
116 | memcpy(dst, src, sizeof(struct lttng_domain)); |
117 | break; | |
118 | default: | |
119 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 120 | break; |
cd80958d DG |
121 | } |
122 | } | |
123 | } | |
124 | ||
125 | /* | |
126 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 127 | * |
1c8d13c8 TD |
128 | * On success, returns the number of bytes sent (>=0) |
129 | * On error, returns -1 | |
fac6795d | 130 | */ |
cd80958d | 131 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
132 | { |
133 | int ret; | |
134 | ||
135 | if (!connected) { | |
2f70b271 | 136 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 137 | goto end; |
fac6795d DG |
138 | } |
139 | ||
a4b92340 DG |
140 | DBG("LSM cmd type : %d", lsm->cmd_type); |
141 | ||
be040666 | 142 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 143 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
144 | if (ret < 0) { |
145 | ret = -LTTNG_ERR_FATAL; | |
146 | } | |
e065084a DG |
147 | |
148 | end: | |
149 | return ret; | |
150 | } | |
151 | ||
53a80697 MD |
152 | /* |
153 | * Send var len data to the session daemon. | |
154 | * | |
155 | * On success, returns the number of bytes sent (>=0) | |
156 | * On error, returns -1 | |
157 | */ | |
c2d69327 | 158 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
159 | { |
160 | int ret; | |
161 | ||
162 | if (!connected) { | |
2f70b271 | 163 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
164 | goto end; |
165 | } | |
a4b92340 | 166 | |
53a80697 MD |
167 | if (!data || !len) { |
168 | ret = 0; | |
169 | goto end; | |
170 | } | |
171 | ||
172 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
173 | if (ret < 0) { |
174 | ret = -LTTNG_ERR_FATAL; | |
175 | } | |
53a80697 MD |
176 | |
177 | end: | |
178 | return ret; | |
179 | } | |
180 | ||
a04d53fc FD |
181 | /* |
182 | * Send file descriptors to the session daemon. | |
183 | * | |
184 | * On success, returns the number of bytes sent (>=0) | |
185 | * On error, returns -1 | |
186 | */ | |
187 | static int send_session_fds(const int *fds, size_t nb_fd) | |
188 | { | |
189 | int ret; | |
190 | ||
191 | if (!connected) { | |
192 | ret = -LTTNG_ERR_NO_SESSIOND; | |
193 | goto end; | |
194 | } | |
195 | ||
196 | if (!fds || !nb_fd) { | |
197 | ret = 0; | |
198 | goto end; | |
199 | } | |
200 | ||
201 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
202 | if (ret < 0) { | |
203 | ret = -LTTNG_ERR_FATAL; | |
204 | } | |
205 | ||
206 | end: | |
207 | return ret; | |
208 | } | |
209 | ||
e065084a | 210 | /* |
cd80958d | 211 | * Receive data from the sessiond socket. |
e065084a | 212 | * |
1c8d13c8 TD |
213 | * On success, returns the number of bytes received (>=0) |
214 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 215 | */ |
ca95a216 | 216 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
217 | { |
218 | int ret; | |
219 | ||
220 | if (!connected) { | |
2f70b271 | 221 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 222 | goto end; |
fac6795d DG |
223 | } |
224 | ||
ca95a216 | 225 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
226 | if (ret < 0) { |
227 | ret = -LTTNG_ERR_FATAL; | |
228 | } | |
fac6795d | 229 | |
e065084a | 230 | end: |
fac6795d DG |
231 | return ret; |
232 | } | |
233 | ||
234 | /* | |
9ae110e2 | 235 | * Check if we are in the specified group. |
65beb5ff | 236 | * |
9ae110e2 | 237 | * If yes return 1, else return -1. |
947308c4 | 238 | */ |
6c71277b MD |
239 | LTTNG_HIDDEN |
240 | int lttng_check_tracing_group(void) | |
947308c4 DG |
241 | { |
242 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
243 | gid_t *grp_list; | |
244 | int grp_list_size, grp_id, i; | |
245 | int ret = -1; | |
6c71277b | 246 | const char *grp_name = tracing_group; |
947308c4 DG |
247 | |
248 | /* Get GID of group 'tracing' */ | |
249 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
250 | if (!grp_tracing) { |
251 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
252 | goto end; |
253 | } | |
254 | ||
255 | /* Get number of supplementary group IDs */ | |
256 | grp_list_size = getgroups(0, NULL); | |
257 | if (grp_list_size < 0) { | |
6f04ed72 | 258 | PERROR("getgroups"); |
947308c4 DG |
259 | goto end; |
260 | } | |
261 | ||
262 | /* Alloc group list of the right size */ | |
3f451dc0 | 263 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 264 | if (!grp_list) { |
6f04ed72 | 265 | PERROR("malloc"); |
00795392 MD |
266 | goto end; |
267 | } | |
947308c4 | 268 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 269 | if (grp_id < 0) { |
6f04ed72 | 270 | PERROR("getgroups"); |
947308c4 DG |
271 | goto free_list; |
272 | } | |
273 | ||
274 | for (i = 0; i < grp_list_size; i++) { | |
275 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 276 | ret = 1; |
947308c4 DG |
277 | break; |
278 | } | |
279 | } | |
280 | ||
281 | free_list: | |
282 | free(grp_list); | |
283 | ||
284 | end: | |
285 | return ret; | |
286 | } | |
287 | ||
288 | /* | |
2269e89e DG |
289 | * Try connect to session daemon with sock_path. |
290 | * | |
291 | * Return 0 on success, else -1 | |
292 | */ | |
293 | static int try_connect_sessiond(const char *sock_path) | |
294 | { | |
295 | int ret; | |
296 | ||
297 | /* If socket exist, we check if the daemon listens for connect. */ | |
298 | ret = access(sock_path, F_OK); | |
299 | if (ret < 0) { | |
300 | /* Not alive */ | |
2f70b271 | 301 | goto error; |
2269e89e DG |
302 | } |
303 | ||
304 | ret = lttcomm_connect_unix_sock(sock_path); | |
305 | if (ret < 0) { | |
9ae110e2 | 306 | /* Not alive. */ |
2f70b271 | 307 | goto error; |
2269e89e DG |
308 | } |
309 | ||
310 | ret = lttcomm_close_unix_sock(ret); | |
311 | if (ret < 0) { | |
6f04ed72 | 312 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
313 | } |
314 | ||
315 | return 0; | |
2f70b271 DG |
316 | |
317 | error: | |
318 | return -1; | |
2269e89e DG |
319 | } |
320 | ||
321 | /* | |
2f70b271 DG |
322 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
323 | * variable. | |
324 | * | |
325 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
326 | * is somehow too long or ENOMEM). | |
947308c4 DG |
327 | */ |
328 | static int set_session_daemon_path(void) | |
329 | { | |
9ae110e2 | 330 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
331 | uid_t uid; |
332 | ||
333 | uid = getuid(); | |
947308c4 | 334 | |
2269e89e DG |
335 | if (uid != 0) { |
336 | /* Are we in the tracing group ? */ | |
6c71277b | 337 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
338 | } |
339 | ||
08a9c49f | 340 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
341 | lttng_ctl_copy_string(sessiond_sock_path, |
342 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 343 | } |
2269e89e | 344 | |
08a9c49f | 345 | if (uid != 0) { |
c617c0c6 MD |
346 | int ret; |
347 | ||
08a9c49f | 348 | if (in_tgroup) { |
9ae110e2 | 349 | /* Tracing group. */ |
08a9c49f TD |
350 | ret = try_connect_sessiond(sessiond_sock_path); |
351 | if (ret >= 0) { | |
352 | goto end; | |
2269e89e | 353 | } |
08a9c49f | 354 | /* Global session daemon not available... */ |
2269e89e | 355 | } |
08a9c49f TD |
356 | /* ...or not in tracing group (and not root), default */ |
357 | ||
358 | /* | |
9ae110e2 JG |
359 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
360 | * is too small; | |
361 | * With GNU C >= 2.1, snprintf returns the required size | |
362 | * (excluding closing null) | |
08a9c49f TD |
363 | */ |
364 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 365 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 366 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 367 | goto error; |
947308c4 | 368 | } |
947308c4 | 369 | } |
08a9c49f | 370 | end: |
947308c4 | 371 | return 0; |
2f70b271 DG |
372 | |
373 | error: | |
374 | return -1; | |
947308c4 DG |
375 | } |
376 | ||
65beb5ff | 377 | /* |
9ae110e2 | 378 | * Connect to the LTTng session daemon. |
65beb5ff | 379 | * |
9ae110e2 | 380 | * On success, return 0. On error, return -1. |
65beb5ff DG |
381 | */ |
382 | static int connect_sessiond(void) | |
383 | { | |
384 | int ret; | |
385 | ||
da3c9ec1 DG |
386 | /* Don't try to connect if already connected. */ |
387 | if (connected) { | |
388 | return 0; | |
389 | } | |
390 | ||
65beb5ff DG |
391 | ret = set_session_daemon_path(); |
392 | if (ret < 0) { | |
2f70b271 | 393 | goto error; |
65beb5ff DG |
394 | } |
395 | ||
9ae110e2 | 396 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
397 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
398 | if (ret < 0) { | |
2f70b271 | 399 | goto error; |
65beb5ff DG |
400 | } |
401 | ||
402 | sessiond_socket = ret; | |
403 | connected = 1; | |
404 | ||
405 | return 0; | |
2f70b271 DG |
406 | |
407 | error: | |
408 | return -1; | |
65beb5ff DG |
409 | } |
410 | ||
411 | /* | |
1c8d13c8 | 412 | * Clean disconnect from the session daemon. |
9ae110e2 | 413 | * |
1c8d13c8 | 414 | * On success, return 0. On error, return -1. |
65beb5ff DG |
415 | */ |
416 | static int disconnect_sessiond(void) | |
417 | { | |
418 | int ret = 0; | |
419 | ||
420 | if (connected) { | |
421 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
422 | sessiond_socket = 0; | |
423 | connected = 0; | |
424 | } | |
425 | ||
426 | return ret; | |
427 | } | |
428 | ||
795a978d PP |
429 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
430 | size_t *user_len) | |
431 | { | |
432 | int ret = 0; | |
433 | void *buf = NULL; | |
434 | ||
435 | if (len) { | |
436 | if (!user_len) { | |
437 | ret = -LTTNG_ERR_INVALID; | |
438 | goto end; | |
439 | } | |
440 | ||
441 | buf = zmalloc(len); | |
442 | if (!buf) { | |
443 | ret = -ENOMEM; | |
444 | goto end; | |
445 | } | |
446 | ||
447 | ret = recv_data_sessiond(buf, len); | |
448 | if (ret < 0) { | |
449 | goto end; | |
450 | } | |
451 | ||
452 | if (!user_buf) { | |
453 | ret = -LTTNG_ERR_INVALID; | |
454 | goto end; | |
455 | } | |
456 | ||
457 | /* Move ownership of command header buffer to user. */ | |
458 | *user_buf = buf; | |
459 | buf = NULL; | |
460 | *user_len = len; | |
461 | } else { | |
462 | /* No command header. */ | |
463 | if (user_len) { | |
464 | *user_len = 0; | |
465 | } | |
466 | ||
467 | if (user_buf) { | |
468 | *user_buf = NULL; | |
469 | } | |
470 | } | |
471 | ||
472 | end: | |
473 | free(buf); | |
474 | return ret; | |
475 | } | |
476 | ||
35a6fdb7 | 477 | /* |
cd80958d | 478 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
479 | * Takes extra var. len. data and file descriptors as input to send to the |
480 | * session daemon. | |
65beb5ff | 481 | * |
af87c45a | 482 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 483 | */ |
cac3069d | 484 | LTTNG_HIDDEN |
a04d53fc FD |
485 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
486 | const int *fds, size_t nb_fd, const void *vardata, | |
487 | size_t vardata_len, void **user_payload_buf, | |
488 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
489 | { |
490 | int ret; | |
795a978d | 491 | size_t payload_len; |
cd80958d | 492 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
493 | |
494 | ret = connect_sessiond(); | |
495 | if (ret < 0) { | |
2f70b271 | 496 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
497 | goto end; |
498 | } | |
499 | ||
65beb5ff | 500 | /* Send command to session daemon */ |
cd80958d | 501 | ret = send_session_msg(lsm); |
65beb5ff | 502 | if (ret < 0) { |
2f70b271 | 503 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
504 | goto end; |
505 | } | |
53a80697 | 506 | /* Send var len data */ |
795a978d | 507 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 508 | if (ret < 0) { |
2f70b271 | 509 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
510 | goto end; |
511 | } | |
65beb5ff | 512 | |
a04d53fc FD |
513 | /* Send fds */ |
514 | ret = send_session_fds(fds, nb_fd); | |
515 | if (ret < 0) { | |
516 | /* Ret value is a valid lttng error code. */ | |
517 | goto end; | |
518 | } | |
519 | ||
65beb5ff DG |
520 | /* Get header from data transmission */ |
521 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
522 | if (ret < 0) { | |
2f70b271 | 523 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
524 | goto end; |
525 | } | |
526 | ||
527 | /* Check error code if OK */ | |
f73fabfd | 528 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
529 | ret = -llm.ret_code; |
530 | goto end; | |
531 | } | |
532 | ||
795a978d PP |
533 | /* Get command header from data transmission */ |
534 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
535 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 536 | if (ret < 0) { |
65beb5ff DG |
537 | goto end; |
538 | } | |
539 | ||
795a978d PP |
540 | /* Get payload from data transmission */ |
541 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
542 | &payload_len); | |
543 | if (ret < 0) { | |
83009e5e DG |
544 | goto end; |
545 | } | |
546 | ||
795a978d | 547 | ret = llm.data_size; |
65beb5ff DG |
548 | |
549 | end: | |
550 | disconnect_sessiond(); | |
551 | return ret; | |
552 | } | |
553 | ||
9f19cc17 | 554 | /* |
cd80958d | 555 | * Create lttng handle and return pointer. |
9ae110e2 | 556 | * |
1c8d13c8 | 557 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 558 | */ |
cd80958d DG |
559 | struct lttng_handle *lttng_create_handle(const char *session_name, |
560 | struct lttng_domain *domain) | |
9f19cc17 | 561 | { |
2f70b271 DG |
562 | struct lttng_handle *handle = NULL; |
563 | ||
3f451dc0 | 564 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 565 | if (handle == NULL) { |
2f70b271 | 566 | PERROR("malloc handle"); |
cd80958d DG |
567 | goto end; |
568 | } | |
569 | ||
570 | /* Copy session name */ | |
cac3069d | 571 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
572 | sizeof(handle->session_name)); |
573 | ||
95681498 JG |
574 | /* Copy lttng domain or leave initialized to 0. */ |
575 | if (domain) { | |
576 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
577 | } | |
cd80958d DG |
578 | |
579 | end: | |
580 | return handle; | |
581 | } | |
582 | ||
583 | /* | |
584 | * Destroy handle by free(3) the pointer. | |
585 | */ | |
586 | void lttng_destroy_handle(struct lttng_handle *handle) | |
587 | { | |
0e428499 | 588 | free(handle); |
eb354453 DG |
589 | } |
590 | ||
d9800920 DG |
591 | /* |
592 | * Register an outside consumer. | |
9ae110e2 | 593 | * |
1c8d13c8 | 594 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
595 | */ |
596 | int lttng_register_consumer(struct lttng_handle *handle, | |
597 | const char *socket_path) | |
598 | { | |
599 | struct lttcomm_session_msg lsm; | |
600 | ||
2f70b271 DG |
601 | if (handle == NULL || socket_path == NULL) { |
602 | return -LTTNG_ERR_INVALID; | |
603 | } | |
604 | ||
53efb85a | 605 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 606 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 607 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 608 | sizeof(lsm.session.name)); |
cac3069d | 609 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 610 | |
9ae110e2 JG |
611 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
612 | sizeof(lsm.u.reg.path)); | |
d9800920 | 613 | |
cac3069d | 614 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
615 | } |
616 | ||
1df4dedd | 617 | /* |
9ae110e2 JG |
618 | * Start tracing for all traces of the session. |
619 | * | |
620 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 621 | */ |
6a4f824d | 622 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 623 | { |
cd80958d DG |
624 | struct lttcomm_session_msg lsm; |
625 | ||
6a4f824d | 626 | if (session_name == NULL) { |
2f70b271 | 627 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
628 | } |
629 | ||
53efb85a | 630 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 631 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 632 | |
cac3069d DG |
633 | lttng_ctl_copy_string(lsm.session.name, session_name, |
634 | sizeof(lsm.session.name)); | |
cd80958d | 635 | |
cac3069d | 636 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 637 | } |
1df4dedd DG |
638 | |
639 | /* | |
38ee087f | 640 | * Stop tracing for all traces of the session. |
f3ed775e | 641 | */ |
38ee087f | 642 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 643 | { |
38ee087f | 644 | int ret, data_ret; |
cd80958d DG |
645 | struct lttcomm_session_msg lsm; |
646 | ||
6a4f824d | 647 | if (session_name == NULL) { |
2f70b271 | 648 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
649 | } |
650 | ||
53efb85a | 651 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 652 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 653 | |
cac3069d DG |
654 | lttng_ctl_copy_string(lsm.session.name, session_name, |
655 | sizeof(lsm.session.name)); | |
cd80958d | 656 | |
cac3069d | 657 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
658 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
659 | goto error; | |
660 | } | |
661 | ||
662 | if (!wait) { | |
663 | goto end; | |
664 | } | |
665 | ||
38ee087f DG |
666 | /* Check for data availability */ |
667 | do { | |
6d805429 | 668 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
669 | if (data_ret < 0) { |
670 | /* Return the data available call error. */ | |
671 | ret = data_ret; | |
672 | goto error; | |
673 | } | |
674 | ||
675 | /* | |
9ae110e2 JG |
676 | * Data sleep time before retrying (in usec). Don't sleep if the |
677 | * call returned value indicates availability. | |
38ee087f | 678 | */ |
6d805429 | 679 | if (data_ret) { |
38ee087f | 680 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 681 | } |
6d805429 | 682 | } while (data_ret != 0); |
38ee087f | 683 | |
38ee087f DG |
684 | end: |
685 | error: | |
686 | return ret; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Stop tracing and wait for data availability. | |
691 | */ | |
692 | int lttng_stop_tracing(const char *session_name) | |
693 | { | |
694 | return _lttng_stop_tracing(session_name, 1); | |
695 | } | |
696 | ||
697 | /* | |
698 | * Stop tracing but _don't_ wait for data availability. | |
699 | */ | |
700 | int lttng_stop_tracing_no_wait(const char *session_name) | |
701 | { | |
702 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
703 | } |
704 | ||
705 | /* | |
601d5acf DG |
706 | * Add context to a channel. |
707 | * | |
708 | * If the given channel is NULL, add the contexts to all channels. | |
709 | * The event_name param is ignored. | |
af87c45a DG |
710 | * |
711 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 712 | */ |
cd80958d | 713 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
714 | struct lttng_event_context *ctx, const char *event_name, |
715 | const char *channel_name) | |
d65106b1 | 716 | { |
2001793c JG |
717 | int ret; |
718 | size_t len = 0; | |
719 | char *buf = NULL; | |
cd80958d DG |
720 | struct lttcomm_session_msg lsm; |
721 | ||
9ae110e2 | 722 | /* Safety check. Both are mandatory. */ |
9d697d3d | 723 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
724 | ret = -LTTNG_ERR_INVALID; |
725 | goto end; | |
cd80958d DG |
726 | } |
727 | ||
441c16a7 | 728 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
729 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
730 | ||
85076754 MD |
731 | /* If no channel name, send empty string. */ |
732 | if (channel_name == NULL) { | |
733 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
734 | sizeof(lsm.u.context.channel_name)); | |
735 | } else { | |
736 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
737 | sizeof(lsm.u.context.channel_name)); | |
738 | } | |
cd80958d | 739 | |
cac3069d | 740 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cac3069d | 741 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
742 | sizeof(lsm.session.name)); |
743 | ||
2001793c JG |
744 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
745 | size_t provider_len, ctx_len; | |
746 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
747 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
748 | ||
749 | if (!provider_name || !ctx_name) { | |
750 | ret = -LTTNG_ERR_INVALID; | |
751 | goto end; | |
752 | } | |
753 | ||
754 | provider_len = strlen(provider_name); | |
755 | if (provider_len == 0) { | |
756 | ret = -LTTNG_ERR_INVALID; | |
757 | goto end; | |
758 | } | |
759 | lsm.u.context.provider_name_len = provider_len; | |
760 | ||
761 | ctx_len = strlen(ctx_name); | |
762 | if (ctx_len == 0) { | |
763 | ret = -LTTNG_ERR_INVALID; | |
764 | goto end; | |
765 | } | |
766 | lsm.u.context.context_name_len = ctx_len; | |
767 | ||
768 | len = provider_len + ctx_len; | |
769 | buf = zmalloc(len); | |
770 | if (!buf) { | |
771 | ret = -LTTNG_ERR_NOMEM; | |
772 | goto end; | |
773 | } | |
774 | ||
775 | memcpy(buf, provider_name, provider_len); | |
776 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
777 | } | |
778 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
779 | |
780 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
781 | /* | |
782 | * Don't leak application addresses to the sessiond. | |
783 | * This is only necessary when ctx is for an app ctx otherwise | |
784 | * the values inside the union (type & config) are overwritten. | |
785 | */ | |
786 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
787 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
788 | } | |
2001793c | 789 | |
795a978d | 790 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
791 | end: |
792 | free(buf); | |
793 | return ret; | |
d65106b1 DG |
794 | } |
795 | ||
f3ed775e | 796 | /* |
9ae110e2 JG |
797 | * Enable event(s) for a channel. |
798 | * | |
799 | * If no event name is specified, all events are enabled. | |
800 | * If no channel name is specified, the default 'channel0' is used. | |
801 | * | |
802 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 803 | */ |
cd80958d | 804 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 805 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 806 | { |
f8a96544 JI |
807 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
808 | NULL, 0, NULL); | |
1df4dedd DG |
809 | } |
810 | ||
53a80697 | 811 | /* |
025faf73 | 812 | * Create or enable an event with a filter expression. |
178191b3 | 813 | * |
53a80697 MD |
814 | * Return negative error value on error. |
815 | * Return size of returned session payload data if OK. | |
816 | */ | |
025faf73 | 817 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 818 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
819 | const char *filter_expression) |
820 | { | |
f8a96544 JI |
821 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
822 | filter_expression, 0, NULL); | |
53a80697 MD |
823 | } |
824 | ||
347c5ab5 | 825 | /* |
0e115563 | 826 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
827 | * NULL if not applicable. |
828 | * | |
829 | * An event with NO loglevel and the name is * will return NULL. | |
830 | */ | |
0e115563 | 831 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
832 | { |
833 | int err; | |
0e115563 | 834 | char *agent_filter = NULL; |
347c5ab5 DG |
835 | |
836 | assert(ev); | |
837 | ||
838 | /* Don't add filter for the '*' event. */ | |
9f449915 | 839 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 840 | if (filter) { |
0e115563 | 841 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
842 | ev->name); |
843 | } else { | |
0e115563 | 844 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
845 | } |
846 | if (err < 0) { | |
847 | PERROR("asprintf"); | |
6a556f7b | 848 | goto error; |
347c5ab5 DG |
849 | } |
850 | } | |
851 | ||
852 | /* Add loglevel filtering if any for the JUL domain. */ | |
853 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
854 | char *op; | |
855 | ||
856 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
857 | op = ">="; | |
858 | } else { | |
859 | op = "=="; | |
860 | } | |
861 | ||
0e115563 | 862 | if (filter || agent_filter) { |
6a556f7b JG |
863 | char *new_filter; |
864 | ||
fb0edb23 | 865 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 866 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 867 | ev->loglevel); |
0e115563 DG |
868 | if (agent_filter) { |
869 | free(agent_filter); | |
6a556f7b | 870 | } |
0e115563 | 871 | agent_filter = new_filter; |
347c5ab5 | 872 | } else { |
0e115563 | 873 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
874 | ev->loglevel); |
875 | } | |
876 | if (err < 0) { | |
877 | PERROR("asprintf"); | |
6a556f7b | 878 | goto error; |
347c5ab5 DG |
879 | } |
880 | } | |
881 | ||
0e115563 | 882 | return agent_filter; |
6a556f7b | 883 | error: |
0e115563 | 884 | free(agent_filter); |
6a556f7b | 885 | return NULL; |
347c5ab5 DG |
886 | } |
887 | ||
137b9942 | 888 | /* |
ec166985 | 889 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
890 | * newly allocated parser context in ctxp and populate the lsm object with the |
891 | * expression len. | |
892 | * | |
893 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
894 | */ | |
895 | static int generate_filter(char *filter_expression, | |
896 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
897 | { | |
898 | int ret; | |
899 | struct filter_parser_ctx *ctx = NULL; | |
900 | FILE *fmem = NULL; | |
901 | ||
902 | assert(filter_expression); | |
903 | assert(lsm); | |
904 | assert(ctxp); | |
905 | ||
906 | /* | |
907 | * Casting const to non-const, as the underlying function will use it in | |
908 | * read-only mode. | |
909 | */ | |
910 | fmem = lttng_fmemopen((void *) filter_expression, | |
911 | strlen(filter_expression), "r"); | |
912 | if (!fmem) { | |
913 | fprintf(stderr, "Error opening memory as stream\n"); | |
914 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
915 | goto error; | |
916 | } | |
917 | ctx = filter_parser_ctx_alloc(fmem); | |
918 | if (!ctx) { | |
919 | fprintf(stderr, "Error allocating parser\n"); | |
920 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
921 | goto filter_alloc_error; | |
922 | } | |
923 | ret = filter_parser_ctx_append_ast(ctx); | |
924 | if (ret) { | |
925 | fprintf(stderr, "Parse error\n"); | |
926 | ret = -LTTNG_ERR_FILTER_INVAL; | |
927 | goto parse_error; | |
928 | } | |
137b9942 DG |
929 | if (print_xml) { |
930 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
931 | if (ret) { | |
932 | fflush(stdout); | |
933 | fprintf(stderr, "XML print error\n"); | |
934 | ret = -LTTNG_ERR_FILTER_INVAL; | |
935 | goto parse_error; | |
936 | } | |
937 | } | |
938 | ||
939 | dbg_printf("Generating IR... "); | |
940 | fflush(stdout); | |
941 | ret = filter_visitor_ir_generate(ctx); | |
942 | if (ret) { | |
943 | fprintf(stderr, "Generate IR error\n"); | |
944 | ret = -LTTNG_ERR_FILTER_INVAL; | |
945 | goto parse_error; | |
946 | } | |
947 | dbg_printf("done\n"); | |
948 | ||
949 | dbg_printf("Validating IR... "); | |
950 | fflush(stdout); | |
951 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
952 | if (ret) { | |
953 | ret = -LTTNG_ERR_FILTER_INVAL; | |
954 | goto parse_error; | |
955 | } | |
9f449915 PP |
956 | |
957 | /* Normalize globbing patterns in the expression. */ | |
958 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
959 | if (ret) { | |
960 | ret = -LTTNG_ERR_FILTER_INVAL; | |
961 | goto parse_error; | |
962 | } | |
963 | ||
9ae110e2 | 964 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
965 | ret = filter_visitor_ir_validate_string(ctx); |
966 | if (ret) { | |
967 | ret = -LTTNG_ERR_FILTER_INVAL; | |
968 | goto parse_error; | |
969 | } | |
9f449915 PP |
970 | |
971 | /* Validate globbing patterns in the expression. */ | |
972 | ret = filter_visitor_ir_validate_globbing(ctx); | |
973 | if (ret) { | |
974 | ret = -LTTNG_ERR_FILTER_INVAL; | |
975 | goto parse_error; | |
976 | } | |
977 | ||
137b9942 DG |
978 | dbg_printf("done\n"); |
979 | ||
980 | dbg_printf("Generating bytecode... "); | |
981 | fflush(stdout); | |
982 | ret = filter_visitor_bytecode_generate(ctx); | |
983 | if (ret) { | |
984 | fprintf(stderr, "Generate bytecode error\n"); | |
985 | ret = -LTTNG_ERR_FILTER_INVAL; | |
986 | goto parse_error; | |
987 | } | |
988 | dbg_printf("done\n"); | |
989 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
990 | bytecode_get_len(&ctx->bytecode->b)); | |
991 | ||
992 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
993 | + bytecode_get_len(&ctx->bytecode->b); | |
994 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
995 | ||
996 | /* No need to keep the memory stream. */ | |
997 | if (fclose(fmem) != 0) { | |
6f04ed72 | 998 | PERROR("fclose"); |
137b9942 DG |
999 | } |
1000 | ||
1001 | *ctxp = ctx; | |
1002 | return 0; | |
1003 | ||
1004 | parse_error: | |
137b9942 DG |
1005 | filter_ir_free(ctx); |
1006 | filter_parser_ctx_free(ctx); | |
1007 | filter_alloc_error: | |
1008 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1009 | PERROR("fclose"); |
137b9942 DG |
1010 | } |
1011 | error: | |
1012 | return ret; | |
1013 | } | |
1014 | ||
93deb080 JI |
1015 | /* |
1016 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1017 | * If no event name is specified, all events are enabled. | |
1018 | * If no channel name is specified, the default name is used. | |
1019 | * If filter expression is not NULL, the filter is set for the event. | |
1020 | * If exclusion count is not zero, the exclusions are set for the event. | |
1021 | * Returns size of returned session payload data or a negative error code. | |
1022 | */ | |
1023 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1024 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1025 | const char *original_filter_expression, |
93deb080 JI |
1026 | int exclusion_count, char **exclusion_list) |
1027 | { | |
1028 | struct lttcomm_session_msg lsm; | |
64226865 | 1029 | char *varlen_data; |
93deb080 | 1030 | int ret = 0; |
137b9942 | 1031 | unsigned int free_filter_expression = 0; |
93deb080 | 1032 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
1033 | /* |
1034 | * Cast as non-const since we may replace the filter expression | |
1035 | * by a dynamically allocated string. Otherwise, the original | |
1036 | * string is not modified. | |
1037 | */ | |
1038 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1039 | |
1040 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1041 | ret = -LTTNG_ERR_INVALID; |
1042 | goto error; | |
93deb080 JI |
1043 | } |
1044 | ||
9ae110e2 JG |
1045 | /* |
1046 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1047 | * anyway, so treat this corner-case early to eliminate |
1048 | * lttng_fmemopen error for 0-byte allocation. | |
1049 | */ | |
1050 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1051 | ret = -LTTNG_ERR_INVALID; |
1052 | goto error; | |
93deb080 JI |
1053 | } |
1054 | ||
1055 | memset(&lsm, 0, sizeof(lsm)); | |
1056 | ||
1057 | /* If no channel name, send empty string. */ | |
1058 | if (channel_name == NULL) { | |
1059 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1060 | sizeof(lsm.u.enable.channel_name)); | |
1061 | } else { | |
1062 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1063 | sizeof(lsm.u.enable.channel_name)); | |
1064 | } | |
1065 | ||
18a720cd MD |
1066 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1067 | if (ev->name[0] == '\0') { | |
1068 | /* Enable all events */ | |
1069 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1070 | } |
93deb080 | 1071 | |
6565421f | 1072 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1073 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1074 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1075 | ||
1076 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1077 | sizeof(lsm.session.name)); | |
1078 | lsm.u.enable.exclusion_count = exclusion_count; | |
1079 | lsm.u.enable.bytecode_len = 0; | |
1080 | ||
9b21e6d5 DG |
1081 | /* |
1082 | * For the JUL domain, a filter is enforced except for the enable all | |
1083 | * event. This is done to avoid having the event in all sessions thus | |
1084 | * filtering by logger name. | |
1085 | */ | |
1086 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 | 1087 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
0e115563 DG |
1088 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1089 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
3e1c9ff7 | 1090 | goto ask_sessiond; |
93deb080 JI |
1091 | } |
1092 | ||
1093 | /* | |
1094 | * We have either a filter or some exclusions, so we need to set up | |
9ae110e2 | 1095 | * a variable-length memory block from where to send the data. |
93deb080 JI |
1096 | */ |
1097 | ||
9ae110e2 | 1098 | /* Parse filter expression. */ |
5cdb6027 | 1099 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1100 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1101 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1102 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1103 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1104 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1105 | char *agent_filter; | |
64226865 | 1106 | |
347c5ab5 | 1107 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1108 | agent_filter = set_agent_filter(filter_expression, ev); |
1109 | if (!agent_filter) { | |
137b9942 | 1110 | if (!filter_expression) { |
9ae110e2 JG |
1111 | /* |
1112 | * No JUL and no filter, just skip | |
1113 | * everything below. | |
1114 | */ | |
137b9942 DG |
1115 | goto ask_sessiond; |
1116 | } | |
64226865 DG |
1117 | } else { |
1118 | /* | |
9ae110e2 JG |
1119 | * With an agent filter, the original filter has |
1120 | * been added to it thus replace the filter | |
1121 | * expression. | |
64226865 | 1122 | */ |
0e115563 | 1123 | filter_expression = agent_filter; |
e9efbcd3 | 1124 | free_filter_expression = 1; |
9b21e6d5 | 1125 | } |
9b21e6d5 | 1126 | } |
93deb080 | 1127 | |
137b9942 | 1128 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1129 | if (ret) { |
137b9942 | 1130 | goto filter_error; |
93deb080 | 1131 | } |
6b453b5e JG |
1132 | } |
1133 | ||
1134 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
1135 | + lsm.u.enable.expression_len |
1136 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
1137 | if (!varlen_data) { |
1138 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 1139 | goto mem_error; |
6b453b5e | 1140 | } |
137b9942 | 1141 | |
9ae110e2 | 1142 | /* Put exclusion names first in the data. */ |
6b453b5e JG |
1143 | while (exclusion_count--) { |
1144 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
0c82ac62 PP |
1145 | *(exclusion_list + exclusion_count), |
1146 | LTTNG_SYMBOL_NAME_LEN - 1); | |
6b453b5e | 1147 | } |
9ae110e2 | 1148 | /* Add filter expression next. */ |
6b453b5e JG |
1149 | if (lsm.u.enable.expression_len != 0) { |
1150 | memcpy(varlen_data | |
1151 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1152 | filter_expression, | |
1153 | lsm.u.enable.expression_len); | |
1154 | } | |
9ae110e2 | 1155 | /* Add filter bytecode next. */ |
137b9942 | 1156 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1157 | memcpy(varlen_data |
1158 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1159 | + lsm.u.enable.expression_len, | |
1160 | &ctx->bytecode->b, | |
1161 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1162 | } |
1163 | ||
795a978d | 1164 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
67676bd8 | 1165 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
9ae110e2 JG |
1166 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, |
1167 | NULL); | |
6b453b5e | 1168 | free(varlen_data); |
93deb080 | 1169 | |
7ca1dc6f DG |
1170 | mem_error: |
1171 | if (filter_expression && ctx) { | |
93deb080 JI |
1172 | filter_bytecode_free(ctx); |
1173 | filter_ir_free(ctx); | |
1174 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1175 | } |
1176 | filter_error: | |
1177 | if (free_filter_expression) { | |
1178 | /* | |
9ae110e2 JG |
1179 | * The filter expression has been replaced and must be freed as |
1180 | * it is not the original filter expression received as a | |
1181 | * parameter. | |
7ca1dc6f DG |
1182 | */ |
1183 | free(filter_expression); | |
93deb080 | 1184 | } |
137b9942 DG |
1185 | error: |
1186 | /* | |
9ae110e2 JG |
1187 | * Return directly to the caller and don't ask the sessiond since |
1188 | * something went wrong in the parsing of data above. | |
137b9942 | 1189 | */ |
93deb080 | 1190 | return ret; |
3e1c9ff7 DG |
1191 | |
1192 | ask_sessiond: | |
1193 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1194 | return ret; | |
93deb080 JI |
1195 | } |
1196 | ||
6e911cad MD |
1197 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1198 | struct lttng_event *ev, const char *channel_name, | |
1199 | const char *original_filter_expression) | |
1df4dedd | 1200 | { |
cd80958d | 1201 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1202 | char *varlen_data; |
1203 | int ret = 0; | |
1204 | unsigned int free_filter_expression = 0; | |
1205 | struct filter_parser_ctx *ctx = NULL; | |
1206 | /* | |
1207 | * Cast as non-const since we may replace the filter expression | |
1208 | * by a dynamically allocated string. Otherwise, the original | |
1209 | * string is not modified. | |
1210 | */ | |
1211 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1212 | |
6e911cad MD |
1213 | if (handle == NULL || ev == NULL) { |
1214 | ret = -LTTNG_ERR_INVALID; | |
1215 | goto error; | |
1216 | } | |
1217 | ||
9ae110e2 JG |
1218 | /* |
1219 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1220 | * anyway, so treat this corner-case early to eliminate |
1221 | * lttng_fmemopen error for 0-byte allocation. | |
1222 | */ | |
1223 | if (filter_expression && filter_expression[0] == '\0') { | |
1224 | ret = -LTTNG_ERR_INVALID; | |
1225 | goto error; | |
cd80958d DG |
1226 | } |
1227 | ||
441c16a7 MD |
1228 | memset(&lsm, 0, sizeof(lsm)); |
1229 | ||
85076754 MD |
1230 | /* If no channel name, send empty string. */ |
1231 | if (channel_name == NULL) { | |
1232 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1233 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1234 | } else { |
85076754 | 1235 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1236 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1237 | } |
1238 | ||
18a720cd | 1239 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1240 | |
6e911cad MD |
1241 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1242 | /* FIXME: copying non-packed struct to packed struct. */ | |
1243 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1244 | ||
cac3069d | 1245 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1246 | sizeof(lsm.session.name)); |
6e911cad | 1247 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1248 | |
6e911cad MD |
1249 | /* |
1250 | * For the JUL domain, a filter is enforced except for the | |
1251 | * disable all event. This is done to avoid having the event in | |
1252 | * all sessions thus filtering by logger name. | |
1253 | */ | |
1254 | if (filter_expression == NULL && | |
1255 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1256 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1257 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1258 | goto ask_sessiond; |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * We have a filter, so we need to set up a variable-length | |
1263 | * memory block from where to send the data. | |
1264 | */ | |
1265 | ||
1266 | /* Parse filter expression */ | |
1267 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1268 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1269 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1270 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1271 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1272 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1273 | char *agent_filter; | |
6e911cad MD |
1274 | |
1275 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1276 | agent_filter = set_agent_filter(filter_expression, ev); |
1277 | if (!agent_filter) { | |
6e911cad | 1278 | if (!filter_expression) { |
9ae110e2 JG |
1279 | /* |
1280 | * No JUL and no filter, just skip | |
1281 | * everything below. | |
1282 | */ | |
6e911cad MD |
1283 | goto ask_sessiond; |
1284 | } | |
1285 | } else { | |
1286 | /* | |
9ae110e2 JG |
1287 | * With a JUL filter, the original filter has |
1288 | * been added to it thus replace the filter | |
1289 | * expression. | |
6e911cad | 1290 | */ |
0e115563 | 1291 | filter_expression = agent_filter; |
6e911cad MD |
1292 | free_filter_expression = 1; |
1293 | } | |
1294 | } | |
1295 | ||
1296 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1297 | if (ret) { | |
1298 | goto filter_error; | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1303 | + lsm.u.disable.expression_len); | |
1304 | if (!varlen_data) { | |
1305 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1306 | goto mem_error; | |
1307 | } | |
1308 | ||
9ae110e2 | 1309 | /* Add filter expression. */ |
6e911cad MD |
1310 | if (lsm.u.disable.expression_len != 0) { |
1311 | memcpy(varlen_data, | |
1312 | filter_expression, | |
1313 | lsm.u.disable.expression_len); | |
1314 | } | |
9ae110e2 | 1315 | /* Add filter bytecode next. */ |
6e911cad MD |
1316 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1317 | memcpy(varlen_data | |
1318 | + lsm.u.disable.expression_len, | |
1319 | &ctx->bytecode->b, | |
1320 | lsm.u.disable.bytecode_len); | |
1321 | } | |
1322 | ||
795a978d | 1323 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1324 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1325 | free(varlen_data); | |
1326 | ||
1327 | mem_error: | |
1328 | if (filter_expression && ctx) { | |
1329 | filter_bytecode_free(ctx); | |
1330 | filter_ir_free(ctx); | |
1331 | filter_parser_ctx_free(ctx); | |
1332 | } | |
1333 | filter_error: | |
1334 | if (free_filter_expression) { | |
1335 | /* | |
9ae110e2 JG |
1336 | * The filter expression has been replaced and must be freed as |
1337 | * it is not the original filter expression received as a | |
1338 | * parameter. | |
6e911cad MD |
1339 | */ |
1340 | free(filter_expression); | |
1341 | } | |
1342 | error: | |
1343 | /* | |
9ae110e2 JG |
1344 | * Return directly to the caller and don't ask the sessiond since |
1345 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1346 | */ |
1347 | return ret; | |
1348 | ||
1349 | ask_sessiond: | |
1350 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1351 | return ret; | |
1352 | } | |
1353 | ||
1354 | /* | |
9ae110e2 JG |
1355 | * Disable event(s) of a channel and domain. |
1356 | * If no event name is specified, all events are disabled. | |
1357 | * If no channel name is specified, the default 'channel0' is used. | |
1358 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1359 | */ |
1360 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1361 | const char *channel_name) | |
1362 | { | |
1363 | struct lttng_event ev; | |
1364 | ||
1365 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1366 | ev.loglevel = -1; |
6e911cad MD |
1367 | ev.type = LTTNG_EVENT_ALL; |
1368 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1369 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1370 | } |
1371 | ||
cf0bcb51 JG |
1372 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1373 | { | |
1374 | struct lttng_channel *channel = NULL; | |
1375 | struct lttng_channel_extended *extended = NULL; | |
1376 | ||
1377 | if (!domain) { | |
1378 | goto error; | |
1379 | } | |
1380 | ||
1381 | /* Validate domain. */ | |
1382 | switch (domain->type) { | |
1383 | case LTTNG_DOMAIN_UST: | |
1384 | switch (domain->buf_type) { | |
1385 | case LTTNG_BUFFER_PER_UID: | |
1386 | case LTTNG_BUFFER_PER_PID: | |
1387 | break; | |
1388 | default: | |
1389 | goto error; | |
1390 | } | |
1391 | break; | |
1392 | case LTTNG_DOMAIN_KERNEL: | |
1393 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1394 | goto error; | |
1395 | } | |
1396 | break; | |
1397 | default: | |
1398 | goto error; | |
1399 | } | |
1400 | ||
1401 | channel = zmalloc(sizeof(*channel)); | |
1402 | if (!channel) { | |
1403 | goto error; | |
1404 | } | |
1405 | ||
1406 | extended = zmalloc(sizeof(*extended)); | |
1407 | if (!extended) { | |
1408 | goto error; | |
1409 | } | |
1410 | ||
1411 | channel->attr.extended.ptr = extended; | |
1412 | ||
1413 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1414 | return channel; | |
1415 | error: | |
1416 | free(channel); | |
1417 | free(extended); | |
1418 | return NULL; | |
1419 | } | |
1420 | ||
1421 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1422 | { | |
1423 | if (!channel) { | |
1424 | return; | |
1425 | } | |
1426 | ||
1427 | if (channel->attr.extended.ptr) { | |
1428 | free(channel->attr.extended.ptr); | |
1429 | } | |
1430 | free(channel); | |
1431 | } | |
1432 | ||
1df4dedd | 1433 | /* |
9ae110e2 JG |
1434 | * Enable channel per domain |
1435 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1436 | */ |
cd80958d | 1437 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1438 | struct lttng_channel *in_chan) |
a5c5a2bd | 1439 | { |
cd80958d DG |
1440 | struct lttcomm_session_msg lsm; |
1441 | ||
9ae110e2 | 1442 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1443 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1444 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1445 | } |
1446 | ||
441c16a7 | 1447 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1448 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1449 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1450 | |
cf0bcb51 JG |
1451 | if (!in_chan->attr.extended.ptr) { |
1452 | struct lttng_channel *channel; | |
1453 | struct lttng_channel_extended *extended; | |
7d29a247 | 1454 | |
cf0bcb51 JG |
1455 | channel = lttng_channel_create(&handle->domain); |
1456 | if (!channel) { | |
1457 | return -LTTNG_ERR_NOMEM; | |
1458 | } | |
1459 | ||
1460 | /* | |
1461 | * Create a new channel in order to use default extended | |
1462 | * attribute values. | |
1463 | */ | |
1464 | extended = (struct lttng_channel_extended *) | |
1465 | channel->attr.extended.ptr; | |
1466 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1467 | lttng_channel_destroy(channel); | |
1468 | } else { | |
1469 | struct lttng_channel_extended *extended; | |
1470 | ||
1471 | extended = (struct lttng_channel_extended *) | |
1472 | in_chan->attr.extended.ptr; | |
1473 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1474 | } | |
cd80958d | 1475 | |
cf0bcb51 | 1476 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
cac3069d | 1477 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1478 | |
cac3069d | 1479 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1480 | sizeof(lsm.session.name)); |
1481 | ||
cac3069d | 1482 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1483 | } |
1df4dedd | 1484 | |
2ef84c95 | 1485 | /* |
9ae110e2 JG |
1486 | * All tracing will be stopped for registered events of the channel. |
1487 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1488 | */ |
cd80958d | 1489 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1490 | { |
cd80958d DG |
1491 | struct lttcomm_session_msg lsm; |
1492 | ||
9ae110e2 | 1493 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1494 | if (handle == NULL || name == NULL) { |
2f70b271 | 1495 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1496 | } |
1497 | ||
441c16a7 MD |
1498 | memset(&lsm, 0, sizeof(lsm)); |
1499 | ||
cd80958d | 1500 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1501 | |
cac3069d | 1502 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1503 | sizeof(lsm.u.disable.channel_name)); |
1504 | ||
cac3069d | 1505 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1506 | |
cac3069d | 1507 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1508 | sizeof(lsm.session.name)); |
1509 | ||
cac3069d | 1510 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1511 | } |
1512 | ||
ccf10263 | 1513 | /* |
9ae110e2 JG |
1514 | * Add PID to session tracker. |
1515 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1516 | */ |
1517 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1518 | { | |
1519 | struct lttcomm_session_msg lsm; | |
1520 | ||
9ae110e2 | 1521 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1522 | if (handle == NULL) { |
1523 | return -LTTNG_ERR_INVALID; | |
1524 | } | |
1525 | ||
1526 | memset(&lsm, 0, sizeof(lsm)); | |
1527 | ||
1528 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1529 | lsm.u.pid_tracker.pid = pid; | |
1530 | ||
1531 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1532 | ||
1533 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1534 | sizeof(lsm.session.name)); | |
1535 | ||
1536 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1537 | } | |
1538 | ||
1539 | /* | |
9ae110e2 JG |
1540 | * Remove PID from session tracker. |
1541 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1542 | */ |
1543 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1544 | { | |
1545 | struct lttcomm_session_msg lsm; | |
1546 | ||
9ae110e2 | 1547 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1548 | if (handle == NULL) { |
1549 | return -LTTNG_ERR_INVALID; | |
1550 | } | |
1551 | ||
1552 | memset(&lsm, 0, sizeof(lsm)); | |
1553 | ||
1554 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1555 | lsm.u.pid_tracker.pid = pid; | |
1556 | ||
1557 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1558 | ||
1559 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1560 | sizeof(lsm.session.name)); | |
1561 | ||
1562 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1563 | } | |
1564 | ||
fac6795d | 1565 | /* |
9ae110e2 JG |
1566 | * Lists all available tracepoints of domain. |
1567 | * Sets the contents of the events array. | |
1568 | * Returns the number of lttng_event entries in events; | |
1569 | * on error, returns a negative value. | |
fac6795d | 1570 | */ |
cd80958d | 1571 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1572 | struct lttng_event **events) |
fac6795d | 1573 | { |
052da939 | 1574 | int ret; |
cd80958d DG |
1575 | struct lttcomm_session_msg lsm; |
1576 | ||
9d697d3d | 1577 | if (handle == NULL) { |
2f70b271 | 1578 | return -LTTNG_ERR_INVALID; |
cd80958d | 1579 | } |
fac6795d | 1580 | |
53efb85a | 1581 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1582 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1583 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1584 | |
cac3069d | 1585 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1586 | if (ret < 0) { |
1587 | return ret; | |
eb354453 | 1588 | } |
fac6795d | 1589 | |
9f19cc17 | 1590 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1591 | } |
1592 | ||
f37d259d | 1593 | /* |
9ae110e2 JG |
1594 | * Lists all available tracepoint fields of domain. |
1595 | * Sets the contents of the event field array. | |
1596 | * Returns the number of lttng_event_field entries in events; | |
1597 | * on error, returns a negative value. | |
f37d259d MD |
1598 | */ |
1599 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1600 | struct lttng_event_field **fields) | |
1601 | { | |
1602 | int ret; | |
1603 | struct lttcomm_session_msg lsm; | |
1604 | ||
1605 | if (handle == NULL) { | |
2f70b271 | 1606 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1607 | } |
1608 | ||
53efb85a | 1609 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1610 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1611 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1612 | |
cac3069d | 1613 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1614 | if (ret < 0) { |
1615 | return ret; | |
1616 | } | |
1617 | ||
1618 | return ret / sizeof(struct lttng_event_field); | |
1619 | } | |
1620 | ||
834978fd | 1621 | /* |
9ae110e2 JG |
1622 | * Lists all available kernel system calls. Allocates and sets the contents of |
1623 | * the events array. | |
834978fd | 1624 | * |
9ae110e2 JG |
1625 | * Returns the number of lttng_event entries in events; on error, returns a |
1626 | * negative value. | |
834978fd DG |
1627 | */ |
1628 | int lttng_list_syscalls(struct lttng_event **events) | |
1629 | { | |
1630 | int ret; | |
1631 | struct lttcomm_session_msg lsm; | |
1632 | ||
1633 | if (!events) { | |
1634 | return -LTTNG_ERR_INVALID; | |
1635 | } | |
1636 | ||
1637 | memset(&lsm, 0, sizeof(lsm)); | |
1638 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1639 | /* Force kernel domain for system calls. */ | |
1640 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1641 | ||
1642 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1643 | if (ret < 0) { | |
1644 | return ret; | |
1645 | } | |
1646 | ||
1647 | return ret / sizeof(struct lttng_event); | |
1648 | } | |
1649 | ||
1657e9bb | 1650 | /* |
9ae110e2 JG |
1651 | * Returns a human readable string describing |
1652 | * the error code (a negative value). | |
1657e9bb | 1653 | */ |
9a745bc7 | 1654 | const char *lttng_strerror(int code) |
1657e9bb | 1655 | { |
f73fabfd | 1656 | return error_get_str(code); |
1657e9bb DG |
1657 | } |
1658 | ||
aaf97519 | 1659 | /* |
a4b92340 DG |
1660 | * Create a brand new session using name and url for destination. |
1661 | * | |
f73fabfd | 1662 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1663 | */ |
a4b92340 | 1664 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1665 | { |
3dd05a85 | 1666 | int ret; |
a4b92340 | 1667 | ssize_t size; |
00e2e675 | 1668 | struct lttcomm_session_msg lsm; |
a4b92340 | 1669 | struct lttng_uri *uris = NULL; |
00e2e675 | 1670 | |
a4b92340 | 1671 | if (name == NULL) { |
2f70b271 | 1672 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1673 | } |
1674 | ||
a4b92340 | 1675 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1676 | |
a4b92340 | 1677 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1678 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1679 | |
1680 | /* There should never be a data URL */ | |
bc894455 | 1681 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1682 | if (size < 0) { |
2f70b271 | 1683 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1684 | } |
1685 | ||
a4b92340 DG |
1686 | lsm.u.uri.size = size; |
1687 | ||
795a978d | 1688 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1689 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1690 | |
1691 | free(uris); | |
1692 | return ret; | |
00e2e675 DG |
1693 | } |
1694 | ||
8028d920 | 1695 | /* |
9ae110e2 JG |
1696 | * Destroy session using name. |
1697 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1698 | */ |
8fd2c92c | 1699 | static |
e20ee7c2 | 1700 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 1701 | { |
cd80958d DG |
1702 | struct lttcomm_session_msg lsm; |
1703 | ||
843f5df9 | 1704 | if (session_name == NULL) { |
2f70b271 | 1705 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1706 | } |
1707 | ||
53efb85a | 1708 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1709 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1710 | |
cac3069d DG |
1711 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1712 | sizeof(lsm.session.name)); | |
cd80958d | 1713 | |
cac3069d | 1714 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1715 | } |
1716 | ||
e20ee7c2 JD |
1717 | /* |
1718 | * Stop the session and wait for the data before destroying it | |
1719 | */ | |
1720 | int lttng_destroy_session(const char *session_name) | |
1721 | { | |
1722 | int ret; | |
1723 | ||
1724 | /* | |
1725 | * Stop the tracing and wait for the data. | |
1726 | */ | |
1727 | ret = _lttng_stop_tracing(session_name, 1); | |
1728 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1729 | goto end; | |
1730 | } | |
1731 | ||
1732 | ret = _lttng_destroy_session(session_name); | |
1733 | end: | |
1734 | return ret; | |
1735 | } | |
1736 | ||
1737 | /* | |
1738 | * Destroy the session without waiting for the data. | |
1739 | */ | |
1740 | int lttng_destroy_session_no_wait(const char *session_name) | |
1741 | { | |
1742 | int ret; | |
1743 | ||
1744 | /* | |
1745 | * Stop the tracing without waiting for the data. | |
1746 | * The session might already have been stopped, so just | |
1747 | * skip this error. | |
1748 | */ | |
1749 | ret = _lttng_stop_tracing(session_name, 0); | |
1750 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1751 | goto end; | |
1752 | } | |
1753 | ||
1754 | ret = _lttng_destroy_session(session_name); | |
1755 | end: | |
1756 | return ret; | |
1757 | } | |
1758 | ||
57167058 | 1759 | /* |
9ae110e2 JG |
1760 | * Ask the session daemon for all available sessions. |
1761 | * Sets the contents of the sessions array. | |
1762 | * Returns the number of lttng_session entries in sessions; | |
1763 | * on error, returns a negative value. | |
57167058 | 1764 | */ |
ca95a216 | 1765 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1766 | { |
ca95a216 | 1767 | int ret; |
cd80958d | 1768 | struct lttcomm_session_msg lsm; |
57167058 | 1769 | |
53efb85a | 1770 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1771 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1772 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1773 | if (ret < 0) { |
ca95a216 | 1774 | return ret; |
57167058 DG |
1775 | } |
1776 | ||
ca95a216 | 1777 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1778 | } |
1779 | ||
d7ba1388 MD |
1780 | int lttng_set_session_shm_path(const char *session_name, |
1781 | const char *shm_path) | |
1782 | { | |
1783 | struct lttcomm_session_msg lsm; | |
1784 | ||
1785 | if (session_name == NULL) { | |
1786 | return -LTTNG_ERR_INVALID; | |
1787 | } | |
1788 | ||
1789 | memset(&lsm, 0, sizeof(lsm)); | |
1790 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1791 | ||
1792 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1793 | sizeof(lsm.session.name)); | |
1794 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1795 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1796 | ||
1797 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1798 | } | |
1799 | ||
9f19cc17 | 1800 | /* |
9ae110e2 JG |
1801 | * Ask the session daemon for all available domains of a session. |
1802 | * Sets the contents of the domains array. | |
1803 | * Returns the number of lttng_domain entries in domains; | |
1804 | * on error, returns a negative value. | |
9f19cc17 | 1805 | */ |
330be774 | 1806 | int lttng_list_domains(const char *session_name, |
cd80958d | 1807 | struct lttng_domain **domains) |
9f19cc17 DG |
1808 | { |
1809 | int ret; | |
cd80958d DG |
1810 | struct lttcomm_session_msg lsm; |
1811 | ||
330be774 | 1812 | if (session_name == NULL) { |
2f70b271 | 1813 | return -LTTNG_ERR_INVALID; |
cd80958d | 1814 | } |
9f19cc17 | 1815 | |
53efb85a | 1816 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1817 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1818 | ||
cac3069d DG |
1819 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1820 | sizeof(lsm.session.name)); | |
cd80958d | 1821 | |
cac3069d | 1822 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1823 | if (ret < 0) { |
1824 | return ret; | |
1825 | } | |
1826 | ||
1827 | return ret / sizeof(struct lttng_domain); | |
1828 | } | |
1829 | ||
1830 | /* | |
9ae110e2 JG |
1831 | * Ask the session daemon for all available channels of a session. |
1832 | * Sets the contents of the channels array. | |
1833 | * Returns the number of lttng_channel entries in channels; | |
1834 | * on error, returns a negative value. | |
9f19cc17 | 1835 | */ |
cd80958d DG |
1836 | int lttng_list_channels(struct lttng_handle *handle, |
1837 | struct lttng_channel **channels) | |
9f19cc17 DG |
1838 | { |
1839 | int ret; | |
53e367f9 JG |
1840 | size_t channel_count, i; |
1841 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 1842 | sizeof(struct lttng_channel_extended); |
cd80958d | 1843 | struct lttcomm_session_msg lsm; |
53e367f9 | 1844 | void *extended_at; |
cd80958d | 1845 | |
9d697d3d | 1846 | if (handle == NULL) { |
53e367f9 JG |
1847 | ret = -LTTNG_ERR_INVALID; |
1848 | goto end; | |
cd80958d DG |
1849 | } |
1850 | ||
53efb85a | 1851 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1852 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1853 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1854 | sizeof(lsm.session.name)); |
9f19cc17 | 1855 | |
cac3069d | 1856 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1857 | |
cac3069d | 1858 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 1859 | if (ret < 0) { |
53e367f9 JG |
1860 | goto end; |
1861 | } | |
1862 | ||
1863 | if (ret % channel_size) { | |
1864 | ret = -LTTNG_ERR_UNK; | |
1865 | free(*channels); | |
1866 | *channels = NULL; | |
1867 | goto end; | |
9f19cc17 | 1868 | } |
53e367f9 | 1869 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 1870 | |
53e367f9 JG |
1871 | /* Set extended info pointers */ |
1872 | extended_at = ((void *) *channels) + | |
1873 | channel_count * sizeof(struct lttng_channel); | |
1874 | for (i = 0; i < channel_count; i++) { | |
1875 | struct lttng_channel *chan = &(*channels)[i]; | |
1876 | ||
1877 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 1878 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
1879 | } |
1880 | ||
1881 | ret = (int) channel_count; | |
1882 | end: | |
1883 | return ret; | |
9f19cc17 DG |
1884 | } |
1885 | ||
1886 | /* | |
9ae110e2 JG |
1887 | * Ask the session daemon for all available events of a session channel. |
1888 | * Sets the contents of the events array. | |
1889 | * Returns the number of lttng_event entries in events; | |
1890 | * on error, returns a negative value. | |
9f19cc17 | 1891 | */ |
cd80958d DG |
1892 | int lttng_list_events(struct lttng_handle *handle, |
1893 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1894 | { |
1895 | int ret; | |
cd80958d | 1896 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
1897 | struct lttcomm_event_command_header *cmd_header = NULL; |
1898 | size_t cmd_header_len; | |
1899 | uint32_t nb_events, i; | |
de453daa JG |
1900 | void *comm_ext_at; |
1901 | void *listing_at; | |
1902 | char *reception_buffer = NULL; | |
1903 | char *listing = NULL; | |
1904 | size_t storage_req; | |
9f19cc17 | 1905 | |
9d697d3d DG |
1906 | /* Safety check. An handle and channel name are mandatory */ |
1907 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1908 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1909 | } |
1910 | ||
53efb85a | 1911 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1912 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1913 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1914 | sizeof(lsm.session.name)); |
cac3069d | 1915 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 1916 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 1917 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1918 | |
a04d53fc | 1919 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
1920 | (void **) &reception_buffer, (void **) &cmd_header, |
1921 | &cmd_header_len); | |
9f19cc17 | 1922 | if (ret < 0) { |
de453daa | 1923 | goto end; |
9f19cc17 DG |
1924 | } |
1925 | ||
b4e3ceb9 PP |
1926 | /* Set number of events and free command header */ |
1927 | nb_events = cmd_header->nb_events; | |
1928 | if (nb_events > INT_MAX) { | |
1929 | ret = -EOVERFLOW; | |
de453daa | 1930 | goto end; |
b4e3ceb9 | 1931 | } |
b4e3ceb9 PP |
1932 | free(cmd_header); |
1933 | cmd_header = NULL; | |
1934 | ||
de453daa JG |
1935 | /* |
1936 | * The buffer that is returned must contain a "flat" version of | |
1937 | * the events that are returned. In other words, all pointers | |
1938 | * within an lttng_event must point to a location within the returned | |
1939 | * buffer so that the user may free by simply calling free() on the | |
1940 | * returned buffer. This is needed in order to maintain API | |
1941 | * compatibility. | |
1942 | * | |
1943 | * A first pass is performed to figure the size of the buffer that | |
1944 | * must be returned. A second pass is then performed to setup | |
1945 | * the returned events so that their members always point within the | |
1946 | * buffer. | |
1947 | * | |
1948 | * The layout of the returned buffer is as follows: | |
1949 | * - struct lttng_event[nb_events], | |
1950 | * - nb_events times the following: | |
1951 | * - struct lttng_event_extended, | |
1952 | * - flattened version of userspace_probe_location | |
1953 | * - filter_expression | |
1954 | * - exclusions | |
1955 | * - padding to align to 64-bits | |
1956 | */ | |
1957 | comm_ext_at = reception_buffer + | |
1958 | (nb_events * sizeof(struct lttng_event)); | |
1959 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
1960 | |
1961 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
1962 | struct lttcomm_event_extended_header *ext_comm = |
1963 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
b4e3ceb9 | 1964 | |
de453daa JG |
1965 | comm_ext_at += sizeof(*ext_comm); |
1966 | comm_ext_at += ext_comm->filter_len; | |
1967 | comm_ext_at += | |
1968 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
1969 | ||
1970 | storage_req += sizeof(struct lttng_event_extended); | |
1971 | /* TODO: missing size of flat userspace probe. */ | |
1972 | storage_req += ext_comm->filter_len; | |
1973 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
1974 | storage_req += storage_req % 8; | |
b4e3ceb9 PP |
1975 | } |
1976 | ||
de453daa JG |
1977 | listing = zmalloc(storage_req); |
1978 | if (!listing) { | |
1979 | goto end; | |
1980 | } | |
1981 | memcpy(listing, reception_buffer, | |
1982 | nb_events * sizeof(struct lttng_event)); | |
1983 | ||
1984 | comm_ext_at = reception_buffer + | |
1985 | (nb_events * sizeof(struct lttng_event)); | |
1986 | listing_at = listing + | |
1987 | (nb_events * sizeof(struct lttng_event)); | |
1988 | for (i = 0; i < nb_events; i++) { | |
1989 | struct lttng_event *event = (struct lttng_event *) | |
1990 | (listing + (sizeof(struct lttng_event) * i)); | |
1991 | struct lttcomm_event_extended_header *ext_comm = | |
1992 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
1993 | struct lttng_event_extended *event_extended = | |
1994 | (struct lttng_event_extended *) listing_at; | |
1995 | ||
1996 | event->extended.ptr = event_extended; | |
1997 | listing_at += sizeof(*event_extended); | |
1998 | comm_ext_at += sizeof(*ext_comm); | |
1999 | ||
2000 | /* Copy filter expression. */ | |
2001 | memcpy(listing_at, comm_ext_at, ext_comm->filter_len); | |
2002 | event_extended->filter_expression = listing_at; | |
2003 | comm_ext_at += ext_comm->filter_len; | |
2004 | listing_at += ext_comm->filter_len; | |
2005 | ||
2006 | /* Copy exclusions. */ | |
2007 | event_extended->exclusions.count = ext_comm->nb_exclusions; | |
2008 | event_extended->exclusions.strings = listing_at; | |
2009 | memcpy(listing_at, comm_ext_at, | |
2010 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2011 | listing_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2012 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2013 | ||
2014 | listing_at += ((uintptr_t) listing_at) % 8; | |
2015 | } | |
2016 | ||
2017 | *events = (struct lttng_event *) listing; | |
2018 | listing = NULL; | |
2019 | ret = (int) nb_events; | |
2020 | end: | |
b4e3ceb9 | 2021 | free(cmd_header); |
de453daa JG |
2022 | free(reception_buffer); |
2023 | free(listing); | |
b4e3ceb9 | 2024 | return ret; |
9f19cc17 DG |
2025 | } |
2026 | ||
fac6795d | 2027 | /* |
1c8d13c8 TD |
2028 | * Sets the tracing_group variable with name. |
2029 | * This function allocates memory pointed to by tracing_group. | |
2030 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2031 | */ |
2032 | int lttng_set_tracing_group(const char *name) | |
2033 | { | |
9d697d3d | 2034 | if (name == NULL) { |
2f70b271 | 2035 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2036 | } |
2037 | ||
fac6795d | 2038 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2039 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2040 | } |
2041 | ||
2042 | return 0; | |
2043 | } | |
2044 | ||
cd80958d | 2045 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2046 | struct lttng_calibrate *calibrate) |
2047 | { | |
b812e5ca PP |
2048 | /* |
2049 | * This command was removed in LTTng 2.9. | |
2050 | */ | |
2051 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2052 | } |
2053 | ||
5edd7e09 DG |
2054 | /* |
2055 | * Set default channel attributes. | |
441c16a7 | 2056 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2057 | */ |
2058 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2059 | struct lttng_channel_attr *attr) | |
2060 | { | |
294851b0 | 2061 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2062 | |
5edd7e09 DG |
2063 | /* Safety check */ |
2064 | if (attr == NULL || domain == NULL) { | |
2065 | return; | |
2066 | } | |
2067 | ||
294851b0 | 2068 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2069 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2070 | ||
0a9c6494 DG |
2071 | /* Same for all domains. */ |
2072 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2073 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2074 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2075 | ||
5edd7e09 DG |
2076 | switch (domain->type) { |
2077 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2078 | attr->switch_timer_interval = |
2079 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2080 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2081 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2082 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2083 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2084 | if (extended) { |
2085 | extended->monitor_timer_interval = | |
2086 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2087 | extended->blocking_timeout = |
2088 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2089 | } |
5edd7e09 DG |
2090 | break; |
2091 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2092 | switch (domain->buf_type) { |
2093 | case LTTNG_BUFFER_PER_UID: | |
2094 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2095 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2096 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2097 | attr->switch_timer_interval = |
2098 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2099 | attr->read_timer_interval = | |
2100 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2101 | if (extended) { |
2102 | extended->monitor_timer_interval = | |
2103 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2104 | extended->blocking_timeout = |
2105 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2106 | } |
0a9c6494 DG |
2107 | break; |
2108 | case LTTNG_BUFFER_PER_PID: | |
2109 | default: | |
2110 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2111 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2112 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2113 | attr->switch_timer_interval = |
2114 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2115 | attr->read_timer_interval = | |
2116 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2117 | if (extended) { |
2118 | extended->monitor_timer_interval = | |
2119 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2120 | extended->blocking_timeout = |
2121 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2122 | } |
0a9c6494 DG |
2123 | break; |
2124 | } | |
5edd7e09 | 2125 | default: |
441c16a7 | 2126 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2127 | break; |
2128 | } | |
cf0bcb51 JG |
2129 | |
2130 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2131 | } |
2132 | ||
5ba3702f JG |
2133 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2134 | uint64_t *discarded_events) | |
2135 | { | |
2136 | int ret = 0; | |
cf0bcb51 | 2137 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2138 | |
2139 | if (!channel || !discarded_events) { | |
2140 | ret = -LTTNG_ERR_INVALID; | |
2141 | goto end; | |
2142 | } | |
2143 | ||
2144 | chan_ext = channel->attr.extended.ptr; | |
2145 | if (!chan_ext) { | |
2146 | /* | |
2147 | * This can happen since the lttng_channel structure is | |
2148 | * used for other tasks where this pointer is never set. | |
2149 | */ | |
2150 | *discarded_events = 0; | |
2151 | goto end; | |
2152 | } | |
2153 | ||
2154 | *discarded_events = chan_ext->discarded_events; | |
2155 | end: | |
2156 | return ret; | |
2157 | } | |
2158 | ||
2159 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2160 | uint64_t *lost_packets) | |
2161 | { | |
2162 | int ret = 0; | |
cf0bcb51 | 2163 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2164 | |
2165 | if (!channel || !lost_packets) { | |
2166 | ret = -LTTNG_ERR_INVALID; | |
2167 | goto end; | |
2168 | } | |
2169 | ||
2170 | chan_ext = channel->attr.extended.ptr; | |
2171 | if (!chan_ext) { | |
2172 | /* | |
2173 | * This can happen since the lttng_channel structure is | |
2174 | * used for other tasks where this pointer is never set. | |
2175 | */ | |
2176 | *lost_packets = 0; | |
2177 | goto end; | |
2178 | } | |
2179 | ||
2180 | *lost_packets = chan_ext->lost_packets; | |
2181 | end: | |
2182 | return ret; | |
2183 | } | |
2184 | ||
cf0bcb51 JG |
2185 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2186 | uint64_t *monitor_timer_interval) | |
2187 | { | |
2188 | int ret = 0; | |
2189 | ||
2190 | if (!chan || !monitor_timer_interval) { | |
2191 | ret = -LTTNG_ERR_INVALID; | |
2192 | goto end; | |
2193 | } | |
2194 | ||
2195 | if (!chan->attr.extended.ptr) { | |
2196 | ret = -LTTNG_ERR_INVALID; | |
2197 | goto end; | |
2198 | } | |
2199 | ||
2200 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2201 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2202 | end: | |
2203 | return ret; | |
2204 | } | |
2205 | ||
2206 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2207 | uint64_t monitor_timer_interval) | |
2208 | { | |
2209 | int ret = 0; | |
2210 | ||
2211 | if (!chan || !chan->attr.extended.ptr) { | |
2212 | ret = -LTTNG_ERR_INVALID; | |
2213 | goto end; | |
2214 | } | |
2215 | ||
2216 | ((struct lttng_channel_extended *) | |
2217 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2218 | monitor_timer_interval; | |
2219 | end: | |
2220 | return ret; | |
2221 | } | |
2222 | ||
491d1539 MD |
2223 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2224 | int64_t *blocking_timeout) | |
2225 | { | |
2226 | int ret = 0; | |
2227 | ||
2228 | if (!chan || !blocking_timeout) { | |
2229 | ret = -LTTNG_ERR_INVALID; | |
2230 | goto end; | |
2231 | } | |
2232 | ||
2233 | if (!chan->attr.extended.ptr) { | |
2234 | ret = -LTTNG_ERR_INVALID; | |
2235 | goto end; | |
2236 | } | |
2237 | ||
2238 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2239 | chan->attr.extended.ptr)->blocking_timeout; | |
2240 | end: | |
2241 | return ret; | |
2242 | } | |
2243 | ||
2244 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2245 | int64_t blocking_timeout) | |
2246 | { | |
2247 | int ret = 0; | |
2248 | int64_t msec_timeout; | |
2249 | ||
2250 | if (!chan || !chan->attr.extended.ptr) { | |
2251 | ret = -LTTNG_ERR_INVALID; | |
2252 | goto end; | |
2253 | } | |
2254 | ||
2255 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2256 | ret = -LTTNG_ERR_INVALID; | |
2257 | goto end; | |
2258 | } | |
2259 | ||
2260 | /* | |
2261 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2262 | * us to accept a narrower range of values (msecs expressed as a signed | |
2263 | * 32-bit integer). | |
2264 | */ | |
2265 | msec_timeout = blocking_timeout / 1000; | |
2266 | if (msec_timeout != (int32_t) msec_timeout) { | |
2267 | ret = -LTTNG_ERR_INVALID; | |
2268 | goto end; | |
2269 | } | |
2270 | ||
2271 | ((struct lttng_channel_extended *) | |
2272 | chan->attr.extended.ptr)->blocking_timeout = | |
2273 | blocking_timeout; | |
2274 | end: | |
2275 | return ret; | |
2276 | } | |
2277 | ||
fac6795d | 2278 | /* |
2269e89e | 2279 | * Check if session daemon is alive. |
fac6795d | 2280 | * |
2269e89e | 2281 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2282 | * On error returns a negative value. |
fac6795d | 2283 | */ |
947308c4 | 2284 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2285 | { |
2286 | int ret; | |
2287 | ||
2288 | ret = set_session_daemon_path(); | |
2289 | if (ret < 0) { | |
9ae110e2 | 2290 | /* Error. */ |
fac6795d DG |
2291 | return ret; |
2292 | } | |
2293 | ||
9d035200 | 2294 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2295 | /* |
9ae110e2 JG |
2296 | * No socket path set. Weird error which means the constructor |
2297 | * was not called. | |
2f70b271 DG |
2298 | */ |
2299 | assert(0); | |
fac6795d DG |
2300 | } |
2301 | ||
2269e89e | 2302 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2303 | if (ret < 0) { |
9ae110e2 | 2304 | /* Not alive. */ |
7d8234d9 MD |
2305 | return 0; |
2306 | } | |
7d8234d9 | 2307 | |
9ae110e2 | 2308 | /* Is alive. */ |
947308c4 | 2309 | return 1; |
fac6795d DG |
2310 | } |
2311 | ||
00e2e675 | 2312 | /* |
a4b92340 | 2313 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2314 | * |
2315 | * Return 0 on success, else a negative value. | |
2316 | */ | |
a4b92340 DG |
2317 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2318 | const char *control_url, const char *data_url) | |
00e2e675 | 2319 | { |
3dd05a85 | 2320 | int ret; |
a4b92340 | 2321 | ssize_t size; |
00e2e675 | 2322 | struct lttcomm_session_msg lsm; |
a4b92340 | 2323 | struct lttng_uri *uris = NULL; |
00e2e675 | 2324 | |
a4b92340 | 2325 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2326 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2327 | } |
2328 | ||
a4b92340 DG |
2329 | memset(&lsm, 0, sizeof(lsm)); |
2330 | ||
00e2e675 DG |
2331 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2332 | ||
cac3069d | 2333 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2334 | sizeof(lsm.session.name)); |
cac3069d | 2335 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2336 | |
bc894455 | 2337 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2338 | if (size < 0) { |
2f70b271 | 2339 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2340 | } |
2341 | ||
2342 | lsm.u.uri.size = size; | |
00e2e675 | 2343 | |
795a978d | 2344 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2345 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2346 | |
2347 | free(uris); | |
2348 | return ret; | |
00e2e675 DG |
2349 | } |
2350 | ||
2351 | /* | |
9c6bda17 | 2352 | * [OBSOLETE] |
00e2e675 DG |
2353 | */ |
2354 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2355 | { | |
785d2d0d | 2356 | return -ENOSYS; |
00e2e675 DG |
2357 | } |
2358 | ||
2359 | /* | |
9c6bda17 | 2360 | * [OBSOLETE] |
00e2e675 DG |
2361 | */ |
2362 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2363 | { | |
785d2d0d | 2364 | return -ENOSYS; |
00e2e675 DG |
2365 | } |
2366 | ||
07424f16 DG |
2367 | /* |
2368 | * This is an extension of create session that is ONLY and SHOULD only be used | |
2369 | * by the lttng command line program. It exists to avoid using URI parsing in | |
2370 | * the lttng client. | |
2371 | * | |
2372 | * We need the date and time for the trace path subdirectory for the case where | |
2373 | * the user does NOT define one using either -o or -U. Using the normal | |
2374 | * lttng_create_session API call, we have no clue on the session daemon side if | |
2375 | * the URL was generated automatically by the client or define by the user. | |
2376 | * | |
2377 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
2378 | * string and appends it if necessary to the URI subdirectory before sending it | |
2379 | * to the session daemon. | |
2380 | * | |
2381 | * With this extra function, the lttng_create_session call behavior is not | |
2382 | * changed and the timestamp is appended to the URI on the session daemon side | |
2383 | * if necessary. | |
2384 | */ | |
2385 | int _lttng_create_session_ext(const char *name, const char *url, | |
2386 | const char *datetime) | |
2387 | { | |
3dd05a85 | 2388 | int ret; |
07424f16 DG |
2389 | ssize_t size; |
2390 | struct lttcomm_session_msg lsm; | |
2391 | struct lttng_uri *uris = NULL; | |
2392 | ||
2bba9e53 | 2393 | if (name == NULL || datetime == NULL) { |
2f70b271 | 2394 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
2395 | } |
2396 | ||
2397 | memset(&lsm, 0, sizeof(lsm)); | |
2398 | ||
2399 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 2400 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 | 2401 | |
9ae110e2 | 2402 | /* There should never be a data URL. */ |
bc894455 | 2403 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 2404 | if (size < 0) { |
3dd05a85 DG |
2405 | ret = -LTTNG_ERR_INVALID; |
2406 | goto error; | |
07424f16 DG |
2407 | } |
2408 | ||
2409 | lsm.u.uri.size = size; | |
2410 | ||
4b35a6b3 | 2411 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
2412 | /* Don't append datetime if the name was automatically created. */ |
2413 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
2414 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
2415 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
2416 | name, datetime); | |
2417 | } else { | |
2418 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2419 | } | |
07424f16 DG |
2420 | if (ret < 0) { |
2421 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
2422 | ret = -LTTNG_ERR_FATAL; |
2423 | goto error; | |
07424f16 DG |
2424 | } |
2425 | } | |
2426 | ||
795a978d | 2427 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2428 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2429 | |
2430 | error: | |
2431 | free(uris); | |
2432 | return ret; | |
07424f16 DG |
2433 | } |
2434 | ||
806e2684 DG |
2435 | /* |
2436 | * For a given session name, this call checks if the data is ready to be read | |
2437 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2438 | * any readers. | |
2439 | */ | |
6d805429 | 2440 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2441 | { |
2442 | int ret; | |
2443 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2444 | uint8_t *pending = NULL; |
806e2684 DG |
2445 | |
2446 | if (session_name == NULL) { | |
2447 | return -LTTNG_ERR_INVALID; | |
2448 | } | |
2449 | ||
53efb85a | 2450 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2451 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2452 | |
cac3069d DG |
2453 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2454 | sizeof(lsm.session.name)); | |
806e2684 | 2455 | |
f6151c55 JG |
2456 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2457 | if (ret < 0) { | |
2458 | goto end; | |
2459 | } else if (ret != 1) { | |
2460 | /* Unexpected payload size */ | |
2461 | ret = -LTTNG_ERR_INVALID; | |
2462 | goto end; | |
806e2684 DG |
2463 | } |
2464 | ||
f6151c55 JG |
2465 | ret = (int) *pending; |
2466 | end: | |
2467 | free(pending); | |
806e2684 DG |
2468 | return ret; |
2469 | } | |
2470 | ||
27babd3a DG |
2471 | /* |
2472 | * Create a session exclusively used for snapshot. | |
2473 | * | |
2474 | * Returns LTTNG_OK on success or a negative error code. | |
2475 | */ | |
2476 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2477 | { | |
2478 | int ret; | |
2479 | ssize_t size; | |
2480 | struct lttcomm_session_msg lsm; | |
2481 | struct lttng_uri *uris = NULL; | |
2482 | ||
2483 | if (name == NULL) { | |
2484 | return -LTTNG_ERR_INVALID; | |
2485 | } | |
2486 | ||
2487 | memset(&lsm, 0, sizeof(lsm)); | |
2488 | ||
2489 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
2490 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2491 | ||
2492 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2493 | if (size < 0) { | |
2494 | return -LTTNG_ERR_INVALID; | |
2495 | } | |
2496 | ||
2497 | lsm.u.uri.size = size; | |
2498 | ||
10d65351 JD |
2499 | /* |
2500 | * If the user does not specify a custom subdir, use the session name. | |
2501 | */ | |
2502 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { | |
2503 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2504 | if (ret < 0) { | |
2505 | PERROR("snprintf uri subdir"); | |
2506 | ret = -LTTNG_ERR_FATAL; | |
2507 | goto error; | |
2508 | } | |
2509 | } | |
2510 | ||
795a978d | 2511 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
27babd3a DG |
2512 | sizeof(struct lttng_uri) * size, NULL); |
2513 | ||
10d65351 | 2514 | error: |
27babd3a DG |
2515 | free(uris); |
2516 | return ret; | |
2517 | } | |
2518 | ||
ecc48a90 JD |
2519 | /* |
2520 | * Create a session exclusively used for live. | |
2521 | * | |
2522 | * Returns LTTNG_OK on success or a negative error code. | |
2523 | */ | |
2524 | int lttng_create_session_live(const char *name, const char *url, | |
2525 | unsigned int timer_interval) | |
2526 | { | |
2527 | int ret; | |
2528 | ssize_t size; | |
2529 | struct lttcomm_session_msg lsm; | |
2530 | struct lttng_uri *uris = NULL; | |
2531 | ||
92805ee4 | 2532 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
2533 | return -LTTNG_ERR_INVALID; |
2534 | } | |
2535 | ||
2536 | memset(&lsm, 0, sizeof(lsm)); | |
2537 | ||
2538 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
2539 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2540 | ||
1a241656 DG |
2541 | if (url) { |
2542 | size = uri_parse_str_urls(url, NULL, &uris); | |
2543 | if (size <= 0) { | |
2544 | ret = -LTTNG_ERR_INVALID; | |
2545 | goto end; | |
2546 | } | |
ecc48a90 | 2547 | |
1a241656 DG |
2548 | /* file:// is not accepted for live session. */ |
2549 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
2550 | ret = -LTTNG_ERR_INVALID; | |
2551 | goto end; | |
2552 | } | |
2553 | } else { | |
2554 | size = 0; | |
ecc48a90 JD |
2555 | } |
2556 | ||
2557 | lsm.u.session_live.nb_uri = size; | |
2558 | lsm.u.session_live.timer_interval = timer_interval; | |
2559 | ||
795a978d | 2560 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
ecc48a90 JD |
2561 | sizeof(struct lttng_uri) * size, NULL); |
2562 | ||
2563 | end: | |
2564 | free(uris); | |
2565 | return ret; | |
2566 | } | |
2567 | ||
a5dfbb9d MD |
2568 | /* |
2569 | * List PIDs in the tracker. | |
2570 | * | |
1b18ce93 JG |
2571 | * enabled is set to whether the PID tracker is enabled. |
2572 | * pids is set to an allocated array of PIDs currently tracked. On | |
2573 | * success, pids must be freed by the caller. | |
2574 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2575 | * |
2576 | * Returns 0 on success, else a negative LTTng error code. | |
2577 | */ | |
2578 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2579 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2580 | { | |
ebbf5ab7 JR |
2581 | int ret; |
2582 | int enabled = 1; | |
a5dfbb9d MD |
2583 | struct lttcomm_session_msg lsm; |
2584 | size_t nr_pids; | |
2585 | int32_t *pids; | |
2586 | ||
2587 | if (handle == NULL) { | |
2588 | return -LTTNG_ERR_INVALID; | |
2589 | } | |
2590 | ||
2591 | memset(&lsm, 0, sizeof(lsm)); | |
2592 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2593 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2594 | sizeof(lsm.session.name)); | |
2595 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2596 | ||
2597 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2598 | if (ret < 0) { | |
2599 | return ret; | |
2600 | } | |
2601 | nr_pids = ret / sizeof(int32_t); | |
2602 | if (nr_pids == 1 && pids[0] == -1) { | |
2603 | free(pids); | |
2604 | pids = NULL; | |
2605 | enabled = 0; | |
2606 | nr_pids = 0; | |
2607 | } | |
2608 | *_enabled = enabled; | |
2609 | *_pids = pids; | |
2610 | *_nr_pids = nr_pids; | |
2611 | return 0; | |
2612 | } | |
2613 | ||
93ec662e JD |
2614 | /* |
2615 | * Regenerate the metadata for a session. | |
2616 | * Return 0 on success, a negative error code on error. | |
2617 | */ | |
eded6438 | 2618 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2619 | { |
2620 | int ret; | |
2621 | struct lttcomm_session_msg lsm; | |
2622 | ||
2623 | if (!session_name) { | |
2624 | ret = -LTTNG_ERR_INVALID; | |
2625 | goto end; | |
2626 | } | |
2627 | ||
2628 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2629 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2630 | |
2631 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2632 | sizeof(lsm.session.name)); | |
2633 | ||
2634 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2635 | if (ret < 0) { | |
2636 | goto end; | |
2637 | } | |
2638 | ||
2639 | ret = 0; | |
2640 | end: | |
2641 | return ret; | |
2642 | } | |
2643 | ||
eded6438 JD |
2644 | /* |
2645 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2646 | */ | |
2647 | int lttng_metadata_regenerate(const char *session_name) | |
2648 | { | |
2649 | return lttng_regenerate_metadata(session_name); | |
2650 | } | |
2651 | ||
c2561365 JD |
2652 | /* |
2653 | * Regenerate the statedump of a session. | |
2654 | * Return 0 on success, a negative error code on error. | |
2655 | */ | |
2656 | int lttng_regenerate_statedump(const char *session_name) | |
2657 | { | |
2658 | int ret; | |
2659 | struct lttcomm_session_msg lsm; | |
2660 | ||
2661 | if (!session_name) { | |
2662 | ret = -LTTNG_ERR_INVALID; | |
2663 | goto end; | |
2664 | } | |
2665 | ||
2666 | memset(&lsm, 0, sizeof(lsm)); | |
2667 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2668 | ||
2669 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2670 | sizeof(lsm.session.name)); | |
2671 | ||
2672 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2673 | if (ret < 0) { | |
2674 | goto end; | |
2675 | } | |
2676 | ||
2677 | ret = 0; | |
2678 | end: | |
2679 | return ret; | |
2680 | } | |
2681 | ||
a58c490f JG |
2682 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2683 | { | |
2684 | int ret; | |
2685 | struct lttcomm_session_msg lsm; | |
3647288f | 2686 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2687 | |
3647288f | 2688 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2689 | if (!trigger) { |
2690 | ret = -LTTNG_ERR_INVALID; | |
2691 | goto end; | |
2692 | } | |
2693 | ||
2694 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 2695 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2696 | goto end; |
2697 | } | |
2698 | ||
3647288f JG |
2699 | ret = lttng_trigger_serialize(trigger, &buffer); |
2700 | if (ret < 0) { | |
a58c490f JG |
2701 | ret = -LTTNG_ERR_UNK; |
2702 | goto end; | |
2703 | } | |
2704 | ||
a58c490f JG |
2705 | memset(&lsm, 0, sizeof(lsm)); |
2706 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
2707 | lsm.u.trigger.length = (uint32_t) buffer.size; |
2708 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
2709 | buffer.size, NULL); | |
a58c490f | 2710 | end: |
3647288f | 2711 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
2712 | return ret; |
2713 | } | |
2714 | ||
2715 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
2716 | { | |
2717 | int ret; | |
2718 | struct lttcomm_session_msg lsm; | |
3647288f | 2719 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2720 | |
3647288f | 2721 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2722 | if (!trigger) { |
2723 | ret = -LTTNG_ERR_INVALID; | |
2724 | goto end; | |
2725 | } | |
2726 | ||
2727 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 2728 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2729 | goto end; |
2730 | } | |
2731 | ||
3647288f JG |
2732 | ret = lttng_trigger_serialize(trigger, &buffer); |
2733 | if (ret < 0) { | |
a58c490f JG |
2734 | ret = -LTTNG_ERR_UNK; |
2735 | goto end; | |
2736 | } | |
2737 | ||
a58c490f JG |
2738 | memset(&lsm, 0, sizeof(lsm)); |
2739 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
2740 | lsm.u.trigger.length = (uint32_t) buffer.size; |
2741 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
2742 | buffer.size, NULL); | |
a58c490f | 2743 | end: |
3647288f | 2744 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
2745 | return ret; |
2746 | } | |
2747 | ||
d68c9a04 JD |
2748 | int lttng_session_get_current_archive_location(const char *session_name, |
2749 | char **chunk_path) | |
2750 | { | |
2751 | struct lttcomm_session_msg lsm; | |
2752 | struct lttng_session_get_current_output_return *output_return = NULL; | |
2753 | int ret; | |
2754 | size_t path_len; | |
2755 | ||
2756 | memset(&lsm, 0, sizeof(lsm)); | |
2757 | lsm.cmd_type = LTTNG_SESSION_GET_CURRENT_OUTPUT; | |
2758 | ret = lttng_strncpy(lsm.session.name, session_name, | |
2759 | sizeof(lsm.session.name)); | |
2760 | if (ret) { | |
2761 | ret = -LTTNG_ERR_INVALID; | |
2762 | goto end; | |
2763 | } | |
2764 | ||
2765 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &output_return); | |
2766 | if (ret < 0) { | |
2767 | ret = -1; | |
2768 | goto end; | |
2769 | } | |
2770 | ||
2771 | path_len = lttng_strnlen(output_return->path, | |
2772 | sizeof(output_return->path)); | |
2773 | if (path_len == 0 || path_len == sizeof(output_return->path)) { | |
2774 | ret = -LTTNG_ERR_NO_SESSION_OUTPUT; | |
2775 | goto end; | |
2776 | } | |
2777 | ||
2778 | *chunk_path = zmalloc(path_len + 1); | |
2779 | if (!*chunk_path) { | |
2780 | ret = -1; | |
2781 | goto end; | |
2782 | } | |
2783 | memcpy(*chunk_path, output_return->path, path_len); | |
2784 | ||
2785 | ret = 0; | |
2786 | ||
2787 | end: | |
2788 | free(output_return); | |
2789 | return ret; | |
2790 | } | |
2791 | ||
fac6795d | 2792 | /* |
9ae110e2 | 2793 | * lib constructor. |
fac6795d | 2794 | */ |
b2b89e8a | 2795 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
2796 | { |
2797 | /* Set default session group */ | |
bbccc3d2 | 2798 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2799 | } |
49cca668 DG |
2800 | |
2801 | /* | |
9ae110e2 | 2802 | * lib destructor. |
49cca668 | 2803 | */ |
b2b89e8a | 2804 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
2805 | { |
2806 | free(tracing_group); | |
2807 | } |