Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
82a3637f DG |
2 | * liblttngctl.c |
3 | * | |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
2001793c | 7 | * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
d14d33bf AM |
9 | * This library is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
11 | * as published by the Free Software Foundation. | |
82a3637f DG |
12 | * |
13 | * This library is distributed in the hope that it will be useful, | |
fac6795d | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
82a3637f DG |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. | |
17 | * | |
d14d33bf AM |
18 | * You should have received a copy of the GNU Lesser General Public License |
19 | * along with this library; if not, write to the Free Software Foundation, | |
20 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
fac6795d DG |
21 | */ |
22 | ||
6c1c0768 | 23 | #define _LGPL_SOURCE |
44a5e5eb | 24 | #include <assert.h> |
fac6795d | 25 | #include <grp.h> |
1e307fab | 26 | #include <errno.h> |
fac6795d DG |
27 | #include <stdio.h> |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #include <unistd.h> | |
31 | ||
990570ed DG |
32 | #include <common/common.h> |
33 | #include <common/defaults.h> | |
db758600 | 34 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 35 | #include <common/uri.h> |
feb0f3e5 | 36 | #include <common/utils.h> |
1e307fab | 37 | #include <lttng/lttng.h> |
0c89d795 | 38 | #include <lttng/health-internal.h> |
a58c490f JG |
39 | #include <lttng/trigger/trigger-internal.h> |
40 | #include <lttng/endpoint.h> | |
41 | #include <lttng/channel-internal.h> | |
fac6795d | 42 | |
d00c599e DG |
43 | #include "filter/filter-ast.h" |
44 | #include "filter/filter-parser.h" | |
45 | #include "filter/filter-bytecode.h" | |
46 | #include "filter/memstream.h" | |
cac3069d | 47 | #include "lttng-ctl-helper.h" |
53a80697 MD |
48 | |
49 | #ifdef DEBUG | |
d00c599e | 50 | static const int print_xml = 1; |
53a80697 MD |
51 | #define dbg_printf(fmt, args...) \ |
52 | printf("[debug liblttng-ctl] " fmt, ## args) | |
53 | #else | |
d00c599e | 54 | static const int print_xml = 0; |
53a80697 MD |
55 | #define dbg_printf(fmt, args...) \ |
56 | do { \ | |
57 | /* do nothing but check printf format */ \ | |
58 | if (0) \ | |
59 | printf("[debug liblttnctl] " fmt, ## args); \ | |
60 | } while (0) | |
61 | #endif | |
62 | ||
63 | ||
fac6795d DG |
64 | /* Socket to session daemon for communication */ |
65 | static int sessiond_socket; | |
66 | static char sessiond_sock_path[PATH_MAX]; | |
67 | ||
fac6795d DG |
68 | /* Variables */ |
69 | static char *tracing_group; | |
70 | static int connected; | |
71 | ||
97e19046 DG |
72 | /* Global */ |
73 | ||
74 | /* | |
75 | * Those two variables are used by error.h to silent or control the verbosity of | |
76 | * error message. They are global to the library so application linking with it | |
77 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
78 | */ |
79 | int lttng_opt_quiet; | |
80 | int lttng_opt_verbose; | |
c7e35b03 | 81 | int lttng_opt_mi; |
97e19046 | 82 | |
99497cd0 MD |
83 | /* |
84 | * Copy string from src to dst and enforce null terminated byte. | |
85 | */ | |
cac3069d DG |
86 | LTTNG_HIDDEN |
87 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 88 | { |
e7d6716d | 89 | if (src && dst) { |
99497cd0 MD |
90 | strncpy(dst, src, len); |
91 | /* Enforce the NULL terminated byte */ | |
92 | dst[len - 1] = '\0'; | |
cd80958d DG |
93 | } else if (dst) { |
94 | dst[0] = '\0'; | |
99497cd0 MD |
95 | } |
96 | } | |
97 | ||
fac6795d | 98 | /* |
cd80958d | 99 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 100 | * |
cd80958d DG |
101 | * If domain is unknown, default domain will be the kernel. |
102 | */ | |
cac3069d DG |
103 | LTTNG_HIDDEN |
104 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
105 | struct lttng_domain *src) | |
cd80958d DG |
106 | { |
107 | if (src && dst) { | |
108 | switch (src->type) { | |
00e2e675 DG |
109 | case LTTNG_DOMAIN_KERNEL: |
110 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 111 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 112 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 113 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
114 | memcpy(dst, src, sizeof(struct lttng_domain)); |
115 | break; | |
116 | default: | |
117 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 118 | break; |
cd80958d DG |
119 | } |
120 | } | |
121 | } | |
122 | ||
123 | /* | |
124 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 125 | * |
1c8d13c8 TD |
126 | * On success, returns the number of bytes sent (>=0) |
127 | * On error, returns -1 | |
fac6795d | 128 | */ |
cd80958d | 129 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
130 | { |
131 | int ret; | |
132 | ||
133 | if (!connected) { | |
2f70b271 | 134 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 135 | goto end; |
fac6795d DG |
136 | } |
137 | ||
a4b92340 DG |
138 | DBG("LSM cmd type : %d", lsm->cmd_type); |
139 | ||
be040666 | 140 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 141 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
142 | if (ret < 0) { |
143 | ret = -LTTNG_ERR_FATAL; | |
144 | } | |
e065084a DG |
145 | |
146 | end: | |
147 | return ret; | |
148 | } | |
149 | ||
53a80697 MD |
150 | /* |
151 | * Send var len data to the session daemon. | |
152 | * | |
153 | * On success, returns the number of bytes sent (>=0) | |
154 | * On error, returns -1 | |
155 | */ | |
c2d69327 | 156 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
157 | { |
158 | int ret; | |
159 | ||
160 | if (!connected) { | |
2f70b271 | 161 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
162 | goto end; |
163 | } | |
a4b92340 | 164 | |
53a80697 MD |
165 | if (!data || !len) { |
166 | ret = 0; | |
167 | goto end; | |
168 | } | |
169 | ||
170 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
171 | if (ret < 0) { |
172 | ret = -LTTNG_ERR_FATAL; | |
173 | } | |
53a80697 MD |
174 | |
175 | end: | |
176 | return ret; | |
177 | } | |
178 | ||
e065084a | 179 | /* |
cd80958d | 180 | * Receive data from the sessiond socket. |
e065084a | 181 | * |
1c8d13c8 TD |
182 | * On success, returns the number of bytes received (>=0) |
183 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 184 | */ |
ca95a216 | 185 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
186 | { |
187 | int ret; | |
188 | ||
189 | if (!connected) { | |
2f70b271 | 190 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 191 | goto end; |
fac6795d DG |
192 | } |
193 | ||
ca95a216 | 194 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
195 | if (ret < 0) { |
196 | ret = -LTTNG_ERR_FATAL; | |
197 | } | |
fac6795d | 198 | |
e065084a | 199 | end: |
fac6795d DG |
200 | return ret; |
201 | } | |
202 | ||
203 | /* | |
9ae110e2 | 204 | * Check if we are in the specified group. |
65beb5ff | 205 | * |
9ae110e2 | 206 | * If yes return 1, else return -1. |
947308c4 | 207 | */ |
6c71277b MD |
208 | LTTNG_HIDDEN |
209 | int lttng_check_tracing_group(void) | |
947308c4 DG |
210 | { |
211 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
212 | gid_t *grp_list; | |
213 | int grp_list_size, grp_id, i; | |
214 | int ret = -1; | |
6c71277b | 215 | const char *grp_name = tracing_group; |
947308c4 DG |
216 | |
217 | /* Get GID of group 'tracing' */ | |
218 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
219 | if (!grp_tracing) { |
220 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
221 | goto end; |
222 | } | |
223 | ||
224 | /* Get number of supplementary group IDs */ | |
225 | grp_list_size = getgroups(0, NULL); | |
226 | if (grp_list_size < 0) { | |
6f04ed72 | 227 | PERROR("getgroups"); |
947308c4 DG |
228 | goto end; |
229 | } | |
230 | ||
231 | /* Alloc group list of the right size */ | |
3f451dc0 | 232 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 233 | if (!grp_list) { |
6f04ed72 | 234 | PERROR("malloc"); |
00795392 MD |
235 | goto end; |
236 | } | |
947308c4 | 237 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 238 | if (grp_id < 0) { |
6f04ed72 | 239 | PERROR("getgroups"); |
947308c4 DG |
240 | goto free_list; |
241 | } | |
242 | ||
243 | for (i = 0; i < grp_list_size; i++) { | |
244 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 245 | ret = 1; |
947308c4 DG |
246 | break; |
247 | } | |
248 | } | |
249 | ||
250 | free_list: | |
251 | free(grp_list); | |
252 | ||
253 | end: | |
254 | return ret; | |
255 | } | |
256 | ||
257 | /* | |
2269e89e DG |
258 | * Try connect to session daemon with sock_path. |
259 | * | |
260 | * Return 0 on success, else -1 | |
261 | */ | |
262 | static int try_connect_sessiond(const char *sock_path) | |
263 | { | |
264 | int ret; | |
265 | ||
266 | /* If socket exist, we check if the daemon listens for connect. */ | |
267 | ret = access(sock_path, F_OK); | |
268 | if (ret < 0) { | |
269 | /* Not alive */ | |
2f70b271 | 270 | goto error; |
2269e89e DG |
271 | } |
272 | ||
273 | ret = lttcomm_connect_unix_sock(sock_path); | |
274 | if (ret < 0) { | |
9ae110e2 | 275 | /* Not alive. */ |
2f70b271 | 276 | goto error; |
2269e89e DG |
277 | } |
278 | ||
279 | ret = lttcomm_close_unix_sock(ret); | |
280 | if (ret < 0) { | |
6f04ed72 | 281 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
282 | } |
283 | ||
284 | return 0; | |
2f70b271 DG |
285 | |
286 | error: | |
287 | return -1; | |
2269e89e DG |
288 | } |
289 | ||
290 | /* | |
2f70b271 DG |
291 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
292 | * variable. | |
293 | * | |
294 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
295 | * is somehow too long or ENOMEM). | |
947308c4 DG |
296 | */ |
297 | static int set_session_daemon_path(void) | |
298 | { | |
9ae110e2 | 299 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
300 | uid_t uid; |
301 | ||
302 | uid = getuid(); | |
947308c4 | 303 | |
2269e89e DG |
304 | if (uid != 0) { |
305 | /* Are we in the tracing group ? */ | |
6c71277b | 306 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
307 | } |
308 | ||
08a9c49f | 309 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
310 | lttng_ctl_copy_string(sessiond_sock_path, |
311 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 312 | } |
2269e89e | 313 | |
08a9c49f | 314 | if (uid != 0) { |
c617c0c6 MD |
315 | int ret; |
316 | ||
08a9c49f | 317 | if (in_tgroup) { |
9ae110e2 | 318 | /* Tracing group. */ |
08a9c49f TD |
319 | ret = try_connect_sessiond(sessiond_sock_path); |
320 | if (ret >= 0) { | |
321 | goto end; | |
2269e89e | 322 | } |
08a9c49f | 323 | /* Global session daemon not available... */ |
2269e89e | 324 | } |
08a9c49f TD |
325 | /* ...or not in tracing group (and not root), default */ |
326 | ||
327 | /* | |
9ae110e2 JG |
328 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
329 | * is too small; | |
330 | * With GNU C >= 2.1, snprintf returns the required size | |
331 | * (excluding closing null) | |
08a9c49f TD |
332 | */ |
333 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 334 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 335 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 336 | goto error; |
947308c4 | 337 | } |
947308c4 | 338 | } |
08a9c49f | 339 | end: |
947308c4 | 340 | return 0; |
2f70b271 DG |
341 | |
342 | error: | |
343 | return -1; | |
947308c4 DG |
344 | } |
345 | ||
65beb5ff | 346 | /* |
9ae110e2 | 347 | * Connect to the LTTng session daemon. |
65beb5ff | 348 | * |
9ae110e2 | 349 | * On success, return 0. On error, return -1. |
65beb5ff DG |
350 | */ |
351 | static int connect_sessiond(void) | |
352 | { | |
353 | int ret; | |
354 | ||
da3c9ec1 DG |
355 | /* Don't try to connect if already connected. */ |
356 | if (connected) { | |
357 | return 0; | |
358 | } | |
359 | ||
65beb5ff DG |
360 | ret = set_session_daemon_path(); |
361 | if (ret < 0) { | |
2f70b271 | 362 | goto error; |
65beb5ff DG |
363 | } |
364 | ||
9ae110e2 | 365 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
366 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
367 | if (ret < 0) { | |
2f70b271 | 368 | goto error; |
65beb5ff DG |
369 | } |
370 | ||
371 | sessiond_socket = ret; | |
372 | connected = 1; | |
373 | ||
374 | return 0; | |
2f70b271 DG |
375 | |
376 | error: | |
377 | return -1; | |
65beb5ff DG |
378 | } |
379 | ||
380 | /* | |
1c8d13c8 | 381 | * Clean disconnect from the session daemon. |
9ae110e2 | 382 | * |
1c8d13c8 | 383 | * On success, return 0. On error, return -1. |
65beb5ff DG |
384 | */ |
385 | static int disconnect_sessiond(void) | |
386 | { | |
387 | int ret = 0; | |
388 | ||
389 | if (connected) { | |
390 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
391 | sessiond_socket = 0; | |
392 | connected = 0; | |
393 | } | |
394 | ||
395 | return ret; | |
396 | } | |
397 | ||
795a978d PP |
398 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
399 | size_t *user_len) | |
400 | { | |
401 | int ret = 0; | |
402 | void *buf = NULL; | |
403 | ||
404 | if (len) { | |
405 | if (!user_len) { | |
406 | ret = -LTTNG_ERR_INVALID; | |
407 | goto end; | |
408 | } | |
409 | ||
410 | buf = zmalloc(len); | |
411 | if (!buf) { | |
412 | ret = -ENOMEM; | |
413 | goto end; | |
414 | } | |
415 | ||
416 | ret = recv_data_sessiond(buf, len); | |
417 | if (ret < 0) { | |
418 | goto end; | |
419 | } | |
420 | ||
421 | if (!user_buf) { | |
422 | ret = -LTTNG_ERR_INVALID; | |
423 | goto end; | |
424 | } | |
425 | ||
426 | /* Move ownership of command header buffer to user. */ | |
427 | *user_buf = buf; | |
428 | buf = NULL; | |
429 | *user_len = len; | |
430 | } else { | |
431 | /* No command header. */ | |
432 | if (user_len) { | |
433 | *user_len = 0; | |
434 | } | |
435 | ||
436 | if (user_buf) { | |
437 | *user_buf = NULL; | |
438 | } | |
439 | } | |
440 | ||
441 | end: | |
442 | free(buf); | |
443 | return ret; | |
444 | } | |
445 | ||
35a6fdb7 | 446 | /* |
cd80958d | 447 | * Ask the session daemon a specific command and put the data into buf. |
53a80697 | 448 | * Takes extra var. len. data as input to send to the session daemon. |
65beb5ff | 449 | * |
af87c45a | 450 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 451 | */ |
cac3069d DG |
452 | LTTNG_HIDDEN |
453 | int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm, | |
795a978d PP |
454 | const void *vardata, size_t vardata_len, |
455 | void **user_payload_buf, void **user_cmd_header_buf, | |
456 | size_t *user_cmd_header_len) | |
65beb5ff DG |
457 | { |
458 | int ret; | |
795a978d | 459 | size_t payload_len; |
cd80958d | 460 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
461 | |
462 | ret = connect_sessiond(); | |
463 | if (ret < 0) { | |
2f70b271 | 464 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
465 | goto end; |
466 | } | |
467 | ||
65beb5ff | 468 | /* Send command to session daemon */ |
cd80958d | 469 | ret = send_session_msg(lsm); |
65beb5ff | 470 | if (ret < 0) { |
2f70b271 | 471 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
472 | goto end; |
473 | } | |
53a80697 | 474 | /* Send var len data */ |
795a978d | 475 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 476 | if (ret < 0) { |
2f70b271 | 477 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
478 | goto end; |
479 | } | |
65beb5ff DG |
480 | |
481 | /* Get header from data transmission */ | |
482 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
483 | if (ret < 0) { | |
2f70b271 | 484 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
485 | goto end; |
486 | } | |
487 | ||
488 | /* Check error code if OK */ | |
f73fabfd | 489 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
490 | ret = -llm.ret_code; |
491 | goto end; | |
492 | } | |
493 | ||
795a978d PP |
494 | /* Get command header from data transmission */ |
495 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
496 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 497 | if (ret < 0) { |
65beb5ff DG |
498 | goto end; |
499 | } | |
500 | ||
795a978d PP |
501 | /* Get payload from data transmission */ |
502 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
503 | &payload_len); | |
504 | if (ret < 0) { | |
83009e5e DG |
505 | goto end; |
506 | } | |
507 | ||
795a978d | 508 | ret = llm.data_size; |
65beb5ff DG |
509 | |
510 | end: | |
511 | disconnect_sessiond(); | |
512 | return ret; | |
513 | } | |
514 | ||
9f19cc17 | 515 | /* |
cd80958d | 516 | * Create lttng handle and return pointer. |
9ae110e2 | 517 | * |
1c8d13c8 | 518 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 519 | */ |
cd80958d DG |
520 | struct lttng_handle *lttng_create_handle(const char *session_name, |
521 | struct lttng_domain *domain) | |
9f19cc17 | 522 | { |
2f70b271 DG |
523 | struct lttng_handle *handle = NULL; |
524 | ||
3f451dc0 | 525 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 526 | if (handle == NULL) { |
2f70b271 | 527 | PERROR("malloc handle"); |
cd80958d DG |
528 | goto end; |
529 | } | |
530 | ||
531 | /* Copy session name */ | |
cac3069d | 532 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
533 | sizeof(handle->session_name)); |
534 | ||
95681498 JG |
535 | /* Copy lttng domain or leave initialized to 0. */ |
536 | if (domain) { | |
537 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
538 | } | |
cd80958d DG |
539 | |
540 | end: | |
541 | return handle; | |
542 | } | |
543 | ||
544 | /* | |
545 | * Destroy handle by free(3) the pointer. | |
546 | */ | |
547 | void lttng_destroy_handle(struct lttng_handle *handle) | |
548 | { | |
0e428499 | 549 | free(handle); |
eb354453 DG |
550 | } |
551 | ||
d9800920 DG |
552 | /* |
553 | * Register an outside consumer. | |
9ae110e2 | 554 | * |
1c8d13c8 | 555 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
556 | */ |
557 | int lttng_register_consumer(struct lttng_handle *handle, | |
558 | const char *socket_path) | |
559 | { | |
560 | struct lttcomm_session_msg lsm; | |
561 | ||
2f70b271 DG |
562 | if (handle == NULL || socket_path == NULL) { |
563 | return -LTTNG_ERR_INVALID; | |
564 | } | |
565 | ||
53efb85a | 566 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 567 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 568 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 569 | sizeof(lsm.session.name)); |
cac3069d | 570 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 571 | |
9ae110e2 JG |
572 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
573 | sizeof(lsm.u.reg.path)); | |
d9800920 | 574 | |
cac3069d | 575 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
576 | } |
577 | ||
1df4dedd | 578 | /* |
9ae110e2 JG |
579 | * Start tracing for all traces of the session. |
580 | * | |
581 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 582 | */ |
6a4f824d | 583 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 584 | { |
cd80958d DG |
585 | struct lttcomm_session_msg lsm; |
586 | ||
6a4f824d | 587 | if (session_name == NULL) { |
2f70b271 | 588 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
589 | } |
590 | ||
53efb85a | 591 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 592 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 593 | |
cac3069d DG |
594 | lttng_ctl_copy_string(lsm.session.name, session_name, |
595 | sizeof(lsm.session.name)); | |
cd80958d | 596 | |
cac3069d | 597 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 598 | } |
1df4dedd DG |
599 | |
600 | /* | |
38ee087f | 601 | * Stop tracing for all traces of the session. |
f3ed775e | 602 | */ |
38ee087f | 603 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 604 | { |
38ee087f | 605 | int ret, data_ret; |
cd80958d DG |
606 | struct lttcomm_session_msg lsm; |
607 | ||
6a4f824d | 608 | if (session_name == NULL) { |
2f70b271 | 609 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
610 | } |
611 | ||
53efb85a | 612 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 613 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 614 | |
cac3069d DG |
615 | lttng_ctl_copy_string(lsm.session.name, session_name, |
616 | sizeof(lsm.session.name)); | |
cd80958d | 617 | |
cac3069d | 618 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
619 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
620 | goto error; | |
621 | } | |
622 | ||
623 | if (!wait) { | |
624 | goto end; | |
625 | } | |
626 | ||
38ee087f DG |
627 | /* Check for data availability */ |
628 | do { | |
6d805429 | 629 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
630 | if (data_ret < 0) { |
631 | /* Return the data available call error. */ | |
632 | ret = data_ret; | |
633 | goto error; | |
634 | } | |
635 | ||
636 | /* | |
9ae110e2 JG |
637 | * Data sleep time before retrying (in usec). Don't sleep if the |
638 | * call returned value indicates availability. | |
38ee087f | 639 | */ |
6d805429 | 640 | if (data_ret) { |
38ee087f | 641 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 642 | } |
6d805429 | 643 | } while (data_ret != 0); |
38ee087f | 644 | |
38ee087f DG |
645 | end: |
646 | error: | |
647 | return ret; | |
648 | } | |
649 | ||
650 | /* | |
651 | * Stop tracing and wait for data availability. | |
652 | */ | |
653 | int lttng_stop_tracing(const char *session_name) | |
654 | { | |
655 | return _lttng_stop_tracing(session_name, 1); | |
656 | } | |
657 | ||
658 | /* | |
659 | * Stop tracing but _don't_ wait for data availability. | |
660 | */ | |
661 | int lttng_stop_tracing_no_wait(const char *session_name) | |
662 | { | |
663 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
664 | } |
665 | ||
666 | /* | |
601d5acf DG |
667 | * Add context to a channel. |
668 | * | |
669 | * If the given channel is NULL, add the contexts to all channels. | |
670 | * The event_name param is ignored. | |
af87c45a DG |
671 | * |
672 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 673 | */ |
cd80958d | 674 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
675 | struct lttng_event_context *ctx, const char *event_name, |
676 | const char *channel_name) | |
d65106b1 | 677 | { |
2001793c JG |
678 | int ret; |
679 | size_t len = 0; | |
680 | char *buf = NULL; | |
cd80958d DG |
681 | struct lttcomm_session_msg lsm; |
682 | ||
9ae110e2 | 683 | /* Safety check. Both are mandatory. */ |
9d697d3d | 684 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
685 | ret = -LTTNG_ERR_INVALID; |
686 | goto end; | |
cd80958d DG |
687 | } |
688 | ||
441c16a7 | 689 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
690 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
691 | ||
85076754 MD |
692 | /* If no channel name, send empty string. */ |
693 | if (channel_name == NULL) { | |
694 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
695 | sizeof(lsm.u.context.channel_name)); | |
696 | } else { | |
697 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
698 | sizeof(lsm.u.context.channel_name)); | |
699 | } | |
cd80958d | 700 | |
cac3069d | 701 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cac3069d | 702 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
703 | sizeof(lsm.session.name)); |
704 | ||
2001793c JG |
705 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
706 | size_t provider_len, ctx_len; | |
707 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
708 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
709 | ||
710 | if (!provider_name || !ctx_name) { | |
711 | ret = -LTTNG_ERR_INVALID; | |
712 | goto end; | |
713 | } | |
714 | ||
715 | provider_len = strlen(provider_name); | |
716 | if (provider_len == 0) { | |
717 | ret = -LTTNG_ERR_INVALID; | |
718 | goto end; | |
719 | } | |
720 | lsm.u.context.provider_name_len = provider_len; | |
721 | ||
722 | ctx_len = strlen(ctx_name); | |
723 | if (ctx_len == 0) { | |
724 | ret = -LTTNG_ERR_INVALID; | |
725 | goto end; | |
726 | } | |
727 | lsm.u.context.context_name_len = ctx_len; | |
728 | ||
729 | len = provider_len + ctx_len; | |
730 | buf = zmalloc(len); | |
731 | if (!buf) { | |
732 | ret = -LTTNG_ERR_NOMEM; | |
733 | goto end; | |
734 | } | |
735 | ||
736 | memcpy(buf, provider_name, provider_len); | |
737 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
738 | } | |
739 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
740 | |
741 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
742 | /* | |
743 | * Don't leak application addresses to the sessiond. | |
744 | * This is only necessary when ctx is for an app ctx otherwise | |
745 | * the values inside the union (type & config) are overwritten. | |
746 | */ | |
747 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
748 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
749 | } | |
2001793c | 750 | |
795a978d | 751 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
752 | end: |
753 | free(buf); | |
754 | return ret; | |
d65106b1 DG |
755 | } |
756 | ||
f3ed775e | 757 | /* |
9ae110e2 JG |
758 | * Enable event(s) for a channel. |
759 | * | |
760 | * If no event name is specified, all events are enabled. | |
761 | * If no channel name is specified, the default 'channel0' is used. | |
762 | * | |
763 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 764 | */ |
cd80958d | 765 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 766 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 767 | { |
f8a96544 JI |
768 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
769 | NULL, 0, NULL); | |
1df4dedd DG |
770 | } |
771 | ||
53a80697 | 772 | /* |
025faf73 | 773 | * Create or enable an event with a filter expression. |
178191b3 | 774 | * |
53a80697 MD |
775 | * Return negative error value on error. |
776 | * Return size of returned session payload data if OK. | |
777 | */ | |
025faf73 | 778 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 779 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
780 | const char *filter_expression) |
781 | { | |
f8a96544 JI |
782 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
783 | filter_expression, 0, NULL); | |
53a80697 MD |
784 | } |
785 | ||
347c5ab5 | 786 | /* |
0e115563 | 787 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
788 | * NULL if not applicable. |
789 | * | |
790 | * An event with NO loglevel and the name is * will return NULL. | |
791 | */ | |
0e115563 | 792 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
793 | { |
794 | int err; | |
0e115563 | 795 | char *agent_filter = NULL; |
347c5ab5 DG |
796 | |
797 | assert(ev); | |
798 | ||
799 | /* Don't add filter for the '*' event. */ | |
9f449915 | 800 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 801 | if (filter) { |
0e115563 | 802 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
803 | ev->name); |
804 | } else { | |
0e115563 | 805 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
806 | } |
807 | if (err < 0) { | |
808 | PERROR("asprintf"); | |
6a556f7b | 809 | goto error; |
347c5ab5 DG |
810 | } |
811 | } | |
812 | ||
813 | /* Add loglevel filtering if any for the JUL domain. */ | |
814 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
815 | char *op; | |
816 | ||
817 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
818 | op = ">="; | |
819 | } else { | |
820 | op = "=="; | |
821 | } | |
822 | ||
0e115563 | 823 | if (filter || agent_filter) { |
6a556f7b JG |
824 | char *new_filter; |
825 | ||
fb0edb23 | 826 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 827 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 828 | ev->loglevel); |
0e115563 DG |
829 | if (agent_filter) { |
830 | free(agent_filter); | |
6a556f7b | 831 | } |
0e115563 | 832 | agent_filter = new_filter; |
347c5ab5 | 833 | } else { |
0e115563 | 834 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
835 | ev->loglevel); |
836 | } | |
837 | if (err < 0) { | |
838 | PERROR("asprintf"); | |
6a556f7b | 839 | goto error; |
347c5ab5 DG |
840 | } |
841 | } | |
842 | ||
0e115563 | 843 | return agent_filter; |
6a556f7b | 844 | error: |
0e115563 | 845 | free(agent_filter); |
6a556f7b | 846 | return NULL; |
347c5ab5 DG |
847 | } |
848 | ||
137b9942 | 849 | /* |
ec166985 | 850 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
851 | * newly allocated parser context in ctxp and populate the lsm object with the |
852 | * expression len. | |
853 | * | |
854 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
855 | */ | |
856 | static int generate_filter(char *filter_expression, | |
857 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
858 | { | |
859 | int ret; | |
860 | struct filter_parser_ctx *ctx = NULL; | |
861 | FILE *fmem = NULL; | |
862 | ||
863 | assert(filter_expression); | |
864 | assert(lsm); | |
865 | assert(ctxp); | |
866 | ||
867 | /* | |
868 | * Casting const to non-const, as the underlying function will use it in | |
869 | * read-only mode. | |
870 | */ | |
871 | fmem = lttng_fmemopen((void *) filter_expression, | |
872 | strlen(filter_expression), "r"); | |
873 | if (!fmem) { | |
874 | fprintf(stderr, "Error opening memory as stream\n"); | |
875 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
876 | goto error; | |
877 | } | |
878 | ctx = filter_parser_ctx_alloc(fmem); | |
879 | if (!ctx) { | |
880 | fprintf(stderr, "Error allocating parser\n"); | |
881 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
882 | goto filter_alloc_error; | |
883 | } | |
884 | ret = filter_parser_ctx_append_ast(ctx); | |
885 | if (ret) { | |
886 | fprintf(stderr, "Parse error\n"); | |
887 | ret = -LTTNG_ERR_FILTER_INVAL; | |
888 | goto parse_error; | |
889 | } | |
890 | ret = filter_visitor_set_parent(ctx); | |
891 | if (ret) { | |
892 | fprintf(stderr, "Set parent error\n"); | |
893 | ret = -LTTNG_ERR_FILTER_INVAL; | |
894 | goto parse_error; | |
895 | } | |
896 | if (print_xml) { | |
897 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
898 | if (ret) { | |
899 | fflush(stdout); | |
900 | fprintf(stderr, "XML print error\n"); | |
901 | ret = -LTTNG_ERR_FILTER_INVAL; | |
902 | goto parse_error; | |
903 | } | |
904 | } | |
905 | ||
906 | dbg_printf("Generating IR... "); | |
907 | fflush(stdout); | |
908 | ret = filter_visitor_ir_generate(ctx); | |
909 | if (ret) { | |
910 | fprintf(stderr, "Generate IR error\n"); | |
911 | ret = -LTTNG_ERR_FILTER_INVAL; | |
912 | goto parse_error; | |
913 | } | |
914 | dbg_printf("done\n"); | |
915 | ||
916 | dbg_printf("Validating IR... "); | |
917 | fflush(stdout); | |
918 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
919 | if (ret) { | |
920 | ret = -LTTNG_ERR_FILTER_INVAL; | |
921 | goto parse_error; | |
922 | } | |
9f449915 PP |
923 | |
924 | /* Normalize globbing patterns in the expression. */ | |
925 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
926 | if (ret) { | |
927 | ret = -LTTNG_ERR_FILTER_INVAL; | |
928 | goto parse_error; | |
929 | } | |
930 | ||
9ae110e2 | 931 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
932 | ret = filter_visitor_ir_validate_string(ctx); |
933 | if (ret) { | |
934 | ret = -LTTNG_ERR_FILTER_INVAL; | |
935 | goto parse_error; | |
936 | } | |
9f449915 PP |
937 | |
938 | /* Validate globbing patterns in the expression. */ | |
939 | ret = filter_visitor_ir_validate_globbing(ctx); | |
940 | if (ret) { | |
941 | ret = -LTTNG_ERR_FILTER_INVAL; | |
942 | goto parse_error; | |
943 | } | |
944 | ||
137b9942 DG |
945 | dbg_printf("done\n"); |
946 | ||
947 | dbg_printf("Generating bytecode... "); | |
948 | fflush(stdout); | |
949 | ret = filter_visitor_bytecode_generate(ctx); | |
950 | if (ret) { | |
951 | fprintf(stderr, "Generate bytecode error\n"); | |
952 | ret = -LTTNG_ERR_FILTER_INVAL; | |
953 | goto parse_error; | |
954 | } | |
955 | dbg_printf("done\n"); | |
956 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
957 | bytecode_get_len(&ctx->bytecode->b)); | |
958 | ||
959 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
960 | + bytecode_get_len(&ctx->bytecode->b); | |
961 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
962 | ||
963 | /* No need to keep the memory stream. */ | |
964 | if (fclose(fmem) != 0) { | |
6f04ed72 | 965 | PERROR("fclose"); |
137b9942 DG |
966 | } |
967 | ||
968 | *ctxp = ctx; | |
969 | return 0; | |
970 | ||
971 | parse_error: | |
137b9942 DG |
972 | filter_ir_free(ctx); |
973 | filter_parser_ctx_free(ctx); | |
974 | filter_alloc_error: | |
975 | if (fclose(fmem) != 0) { | |
6f04ed72 | 976 | PERROR("fclose"); |
137b9942 DG |
977 | } |
978 | error: | |
979 | return ret; | |
980 | } | |
981 | ||
93deb080 JI |
982 | /* |
983 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
984 | * If no event name is specified, all events are enabled. | |
985 | * If no channel name is specified, the default name is used. | |
986 | * If filter expression is not NULL, the filter is set for the event. | |
987 | * If exclusion count is not zero, the exclusions are set for the event. | |
988 | * Returns size of returned session payload data or a negative error code. | |
989 | */ | |
990 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
991 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 992 | const char *original_filter_expression, |
93deb080 JI |
993 | int exclusion_count, char **exclusion_list) |
994 | { | |
995 | struct lttcomm_session_msg lsm; | |
64226865 | 996 | char *varlen_data; |
93deb080 | 997 | int ret = 0; |
137b9942 | 998 | unsigned int free_filter_expression = 0; |
93deb080 | 999 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
1000 | /* |
1001 | * Cast as non-const since we may replace the filter expression | |
1002 | * by a dynamically allocated string. Otherwise, the original | |
1003 | * string is not modified. | |
1004 | */ | |
1005 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1006 | |
1007 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1008 | ret = -LTTNG_ERR_INVALID; |
1009 | goto error; | |
93deb080 JI |
1010 | } |
1011 | ||
9ae110e2 JG |
1012 | /* |
1013 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1014 | * anyway, so treat this corner-case early to eliminate |
1015 | * lttng_fmemopen error for 0-byte allocation. | |
1016 | */ | |
1017 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1018 | ret = -LTTNG_ERR_INVALID; |
1019 | goto error; | |
93deb080 JI |
1020 | } |
1021 | ||
1022 | memset(&lsm, 0, sizeof(lsm)); | |
1023 | ||
1024 | /* If no channel name, send empty string. */ | |
1025 | if (channel_name == NULL) { | |
1026 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1027 | sizeof(lsm.u.enable.channel_name)); | |
1028 | } else { | |
1029 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1030 | sizeof(lsm.u.enable.channel_name)); | |
1031 | } | |
1032 | ||
18a720cd MD |
1033 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1034 | if (ev->name[0] == '\0') { | |
1035 | /* Enable all events */ | |
1036 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1037 | } |
93deb080 | 1038 | |
6565421f | 1039 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1040 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1041 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1042 | ||
1043 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1044 | sizeof(lsm.session.name)); | |
1045 | lsm.u.enable.exclusion_count = exclusion_count; | |
1046 | lsm.u.enable.bytecode_len = 0; | |
1047 | ||
9b21e6d5 DG |
1048 | /* |
1049 | * For the JUL domain, a filter is enforced except for the enable all | |
1050 | * event. This is done to avoid having the event in all sessions thus | |
1051 | * filtering by logger name. | |
1052 | */ | |
1053 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 | 1054 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
0e115563 DG |
1055 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1056 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
3e1c9ff7 | 1057 | goto ask_sessiond; |
93deb080 JI |
1058 | } |
1059 | ||
1060 | /* | |
1061 | * We have either a filter or some exclusions, so we need to set up | |
9ae110e2 | 1062 | * a variable-length memory block from where to send the data. |
93deb080 JI |
1063 | */ |
1064 | ||
9ae110e2 | 1065 | /* Parse filter expression. */ |
5cdb6027 | 1066 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1067 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1068 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1069 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1070 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1071 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1072 | char *agent_filter; | |
64226865 | 1073 | |
347c5ab5 | 1074 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1075 | agent_filter = set_agent_filter(filter_expression, ev); |
1076 | if (!agent_filter) { | |
137b9942 | 1077 | if (!filter_expression) { |
9ae110e2 JG |
1078 | /* |
1079 | * No JUL and no filter, just skip | |
1080 | * everything below. | |
1081 | */ | |
137b9942 DG |
1082 | goto ask_sessiond; |
1083 | } | |
64226865 DG |
1084 | } else { |
1085 | /* | |
9ae110e2 JG |
1086 | * With an agent filter, the original filter has |
1087 | * been added to it thus replace the filter | |
1088 | * expression. | |
64226865 | 1089 | */ |
0e115563 | 1090 | filter_expression = agent_filter; |
e9efbcd3 | 1091 | free_filter_expression = 1; |
9b21e6d5 | 1092 | } |
9b21e6d5 | 1093 | } |
93deb080 | 1094 | |
137b9942 | 1095 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1096 | if (ret) { |
137b9942 | 1097 | goto filter_error; |
93deb080 | 1098 | } |
6b453b5e JG |
1099 | } |
1100 | ||
1101 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
1102 | + lsm.u.enable.expression_len |
1103 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
1104 | if (!varlen_data) { |
1105 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 1106 | goto mem_error; |
6b453b5e | 1107 | } |
137b9942 | 1108 | |
9ae110e2 | 1109 | /* Put exclusion names first in the data. */ |
6b453b5e JG |
1110 | while (exclusion_count--) { |
1111 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
0c82ac62 PP |
1112 | *(exclusion_list + exclusion_count), |
1113 | LTTNG_SYMBOL_NAME_LEN - 1); | |
6b453b5e | 1114 | } |
9ae110e2 | 1115 | /* Add filter expression next. */ |
6b453b5e JG |
1116 | if (lsm.u.enable.expression_len != 0) { |
1117 | memcpy(varlen_data | |
1118 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1119 | filter_expression, | |
1120 | lsm.u.enable.expression_len); | |
1121 | } | |
9ae110e2 | 1122 | /* Add filter bytecode next. */ |
137b9942 | 1123 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1124 | memcpy(varlen_data |
1125 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1126 | + lsm.u.enable.expression_len, | |
1127 | &ctx->bytecode->b, | |
1128 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1129 | } |
1130 | ||
795a978d | 1131 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
67676bd8 | 1132 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
9ae110e2 JG |
1133 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, |
1134 | NULL); | |
6b453b5e | 1135 | free(varlen_data); |
93deb080 | 1136 | |
7ca1dc6f DG |
1137 | mem_error: |
1138 | if (filter_expression && ctx) { | |
93deb080 JI |
1139 | filter_bytecode_free(ctx); |
1140 | filter_ir_free(ctx); | |
1141 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1142 | } |
1143 | filter_error: | |
1144 | if (free_filter_expression) { | |
1145 | /* | |
9ae110e2 JG |
1146 | * The filter expression has been replaced and must be freed as |
1147 | * it is not the original filter expression received as a | |
1148 | * parameter. | |
7ca1dc6f DG |
1149 | */ |
1150 | free(filter_expression); | |
93deb080 | 1151 | } |
137b9942 DG |
1152 | error: |
1153 | /* | |
9ae110e2 JG |
1154 | * Return directly to the caller and don't ask the sessiond since |
1155 | * something went wrong in the parsing of data above. | |
137b9942 | 1156 | */ |
93deb080 | 1157 | return ret; |
3e1c9ff7 DG |
1158 | |
1159 | ask_sessiond: | |
1160 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1161 | return ret; | |
93deb080 JI |
1162 | } |
1163 | ||
6e911cad MD |
1164 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1165 | struct lttng_event *ev, const char *channel_name, | |
1166 | const char *original_filter_expression) | |
1df4dedd | 1167 | { |
cd80958d | 1168 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1169 | char *varlen_data; |
1170 | int ret = 0; | |
1171 | unsigned int free_filter_expression = 0; | |
1172 | struct filter_parser_ctx *ctx = NULL; | |
1173 | /* | |
1174 | * Cast as non-const since we may replace the filter expression | |
1175 | * by a dynamically allocated string. Otherwise, the original | |
1176 | * string is not modified. | |
1177 | */ | |
1178 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1179 | |
6e911cad MD |
1180 | if (handle == NULL || ev == NULL) { |
1181 | ret = -LTTNG_ERR_INVALID; | |
1182 | goto error; | |
1183 | } | |
1184 | ||
9ae110e2 JG |
1185 | /* |
1186 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1187 | * anyway, so treat this corner-case early to eliminate |
1188 | * lttng_fmemopen error for 0-byte allocation. | |
1189 | */ | |
1190 | if (filter_expression && filter_expression[0] == '\0') { | |
1191 | ret = -LTTNG_ERR_INVALID; | |
1192 | goto error; | |
cd80958d DG |
1193 | } |
1194 | ||
441c16a7 MD |
1195 | memset(&lsm, 0, sizeof(lsm)); |
1196 | ||
85076754 MD |
1197 | /* If no channel name, send empty string. */ |
1198 | if (channel_name == NULL) { | |
1199 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1200 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1201 | } else { |
85076754 | 1202 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1203 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1204 | } |
1205 | ||
18a720cd | 1206 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1207 | |
6e911cad MD |
1208 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1209 | /* FIXME: copying non-packed struct to packed struct. */ | |
1210 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1211 | ||
cac3069d | 1212 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1213 | sizeof(lsm.session.name)); |
6e911cad | 1214 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1215 | |
6e911cad MD |
1216 | /* |
1217 | * For the JUL domain, a filter is enforced except for the | |
1218 | * disable all event. This is done to avoid having the event in | |
1219 | * all sessions thus filtering by logger name. | |
1220 | */ | |
1221 | if (filter_expression == NULL && | |
1222 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1223 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1224 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1225 | goto ask_sessiond; |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * We have a filter, so we need to set up a variable-length | |
1230 | * memory block from where to send the data. | |
1231 | */ | |
1232 | ||
1233 | /* Parse filter expression */ | |
1234 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1235 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1236 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1237 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1238 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1239 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1240 | char *agent_filter; | |
6e911cad MD |
1241 | |
1242 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1243 | agent_filter = set_agent_filter(filter_expression, ev); |
1244 | if (!agent_filter) { | |
6e911cad | 1245 | if (!filter_expression) { |
9ae110e2 JG |
1246 | /* |
1247 | * No JUL and no filter, just skip | |
1248 | * everything below. | |
1249 | */ | |
6e911cad MD |
1250 | goto ask_sessiond; |
1251 | } | |
1252 | } else { | |
1253 | /* | |
9ae110e2 JG |
1254 | * With a JUL filter, the original filter has |
1255 | * been added to it thus replace the filter | |
1256 | * expression. | |
6e911cad | 1257 | */ |
0e115563 | 1258 | filter_expression = agent_filter; |
6e911cad MD |
1259 | free_filter_expression = 1; |
1260 | } | |
1261 | } | |
1262 | ||
1263 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1264 | if (ret) { | |
1265 | goto filter_error; | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1270 | + lsm.u.disable.expression_len); | |
1271 | if (!varlen_data) { | |
1272 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1273 | goto mem_error; | |
1274 | } | |
1275 | ||
9ae110e2 | 1276 | /* Add filter expression. */ |
6e911cad MD |
1277 | if (lsm.u.disable.expression_len != 0) { |
1278 | memcpy(varlen_data, | |
1279 | filter_expression, | |
1280 | lsm.u.disable.expression_len); | |
1281 | } | |
9ae110e2 | 1282 | /* Add filter bytecode next. */ |
6e911cad MD |
1283 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1284 | memcpy(varlen_data | |
1285 | + lsm.u.disable.expression_len, | |
1286 | &ctx->bytecode->b, | |
1287 | lsm.u.disable.bytecode_len); | |
1288 | } | |
1289 | ||
795a978d | 1290 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1291 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1292 | free(varlen_data); | |
1293 | ||
1294 | mem_error: | |
1295 | if (filter_expression && ctx) { | |
1296 | filter_bytecode_free(ctx); | |
1297 | filter_ir_free(ctx); | |
1298 | filter_parser_ctx_free(ctx); | |
1299 | } | |
1300 | filter_error: | |
1301 | if (free_filter_expression) { | |
1302 | /* | |
9ae110e2 JG |
1303 | * The filter expression has been replaced and must be freed as |
1304 | * it is not the original filter expression received as a | |
1305 | * parameter. | |
6e911cad MD |
1306 | */ |
1307 | free(filter_expression); | |
1308 | } | |
1309 | error: | |
1310 | /* | |
9ae110e2 JG |
1311 | * Return directly to the caller and don't ask the sessiond since |
1312 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1313 | */ |
1314 | return ret; | |
1315 | ||
1316 | ask_sessiond: | |
1317 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1318 | return ret; | |
1319 | } | |
1320 | ||
1321 | /* | |
9ae110e2 JG |
1322 | * Disable event(s) of a channel and domain. |
1323 | * If no event name is specified, all events are disabled. | |
1324 | * If no channel name is specified, the default 'channel0' is used. | |
1325 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1326 | */ |
1327 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1328 | const char *channel_name) | |
1329 | { | |
1330 | struct lttng_event ev; | |
1331 | ||
1332 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1333 | ev.loglevel = -1; |
6e911cad MD |
1334 | ev.type = LTTNG_EVENT_ALL; |
1335 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1336 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1337 | } |
1338 | ||
cf0bcb51 JG |
1339 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1340 | { | |
1341 | struct lttng_channel *channel = NULL; | |
1342 | struct lttng_channel_extended *extended = NULL; | |
1343 | ||
1344 | if (!domain) { | |
1345 | goto error; | |
1346 | } | |
1347 | ||
1348 | /* Validate domain. */ | |
1349 | switch (domain->type) { | |
1350 | case LTTNG_DOMAIN_UST: | |
1351 | switch (domain->buf_type) { | |
1352 | case LTTNG_BUFFER_PER_UID: | |
1353 | case LTTNG_BUFFER_PER_PID: | |
1354 | break; | |
1355 | default: | |
1356 | goto error; | |
1357 | } | |
1358 | break; | |
1359 | case LTTNG_DOMAIN_KERNEL: | |
1360 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1361 | goto error; | |
1362 | } | |
1363 | break; | |
1364 | default: | |
1365 | goto error; | |
1366 | } | |
1367 | ||
1368 | channel = zmalloc(sizeof(*channel)); | |
1369 | if (!channel) { | |
1370 | goto error; | |
1371 | } | |
1372 | ||
1373 | extended = zmalloc(sizeof(*extended)); | |
1374 | if (!extended) { | |
1375 | goto error; | |
1376 | } | |
1377 | ||
1378 | channel->attr.extended.ptr = extended; | |
1379 | ||
1380 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1381 | return channel; | |
1382 | error: | |
1383 | free(channel); | |
1384 | free(extended); | |
1385 | return NULL; | |
1386 | } | |
1387 | ||
1388 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1389 | { | |
1390 | if (!channel) { | |
1391 | return; | |
1392 | } | |
1393 | ||
1394 | if (channel->attr.extended.ptr) { | |
1395 | free(channel->attr.extended.ptr); | |
1396 | } | |
1397 | free(channel); | |
1398 | } | |
1399 | ||
1df4dedd | 1400 | /* |
9ae110e2 JG |
1401 | * Enable channel per domain |
1402 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1403 | */ |
cd80958d | 1404 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1405 | struct lttng_channel *in_chan) |
a5c5a2bd | 1406 | { |
cd80958d DG |
1407 | struct lttcomm_session_msg lsm; |
1408 | ||
9ae110e2 | 1409 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1410 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1411 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1412 | } |
1413 | ||
441c16a7 | 1414 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1415 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1416 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1417 | |
cf0bcb51 JG |
1418 | if (!in_chan->attr.extended.ptr) { |
1419 | struct lttng_channel *channel; | |
1420 | struct lttng_channel_extended *extended; | |
7d29a247 | 1421 | |
cf0bcb51 JG |
1422 | channel = lttng_channel_create(&handle->domain); |
1423 | if (!channel) { | |
1424 | return -LTTNG_ERR_NOMEM; | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Create a new channel in order to use default extended | |
1429 | * attribute values. | |
1430 | */ | |
1431 | extended = (struct lttng_channel_extended *) | |
1432 | channel->attr.extended.ptr; | |
1433 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1434 | lttng_channel_destroy(channel); | |
1435 | } else { | |
1436 | struct lttng_channel_extended *extended; | |
1437 | ||
1438 | extended = (struct lttng_channel_extended *) | |
1439 | in_chan->attr.extended.ptr; | |
1440 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1441 | } | |
cd80958d | 1442 | |
cf0bcb51 | 1443 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
cac3069d | 1444 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1445 | |
cac3069d | 1446 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1447 | sizeof(lsm.session.name)); |
1448 | ||
cac3069d | 1449 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1450 | } |
1df4dedd | 1451 | |
2ef84c95 | 1452 | /* |
9ae110e2 JG |
1453 | * All tracing will be stopped for registered events of the channel. |
1454 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1455 | */ |
cd80958d | 1456 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1457 | { |
cd80958d DG |
1458 | struct lttcomm_session_msg lsm; |
1459 | ||
9ae110e2 | 1460 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1461 | if (handle == NULL || name == NULL) { |
2f70b271 | 1462 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1463 | } |
1464 | ||
441c16a7 MD |
1465 | memset(&lsm, 0, sizeof(lsm)); |
1466 | ||
cd80958d | 1467 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1468 | |
cac3069d | 1469 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1470 | sizeof(lsm.u.disable.channel_name)); |
1471 | ||
cac3069d | 1472 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1473 | |
cac3069d | 1474 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1475 | sizeof(lsm.session.name)); |
1476 | ||
cac3069d | 1477 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1478 | } |
1479 | ||
e32d22be MD |
1480 | static |
1481 | int lttng_track_untrack_id(struct lttng_handle *handle, | |
1482 | enum lttng_tracker_type tracker_type, | |
1483 | struct lttng_tracker_id *id, | |
1484 | enum lttcomm_sessiond_command cmd) | |
ccf10263 MD |
1485 | { |
1486 | struct lttcomm_session_msg lsm; | |
e32d22be MD |
1487 | char *var_data = NULL; |
1488 | size_t var_data_len = 0; | |
ccf10263 | 1489 | |
9ae110e2 | 1490 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1491 | if (handle == NULL) { |
1492 | return -LTTNG_ERR_INVALID; | |
1493 | } | |
1494 | ||
1495 | memset(&lsm, 0, sizeof(lsm)); | |
1496 | ||
e32d22be MD |
1497 | lsm.cmd_type = cmd; |
1498 | lsm.u.id_tracker.tracker_type = tracker_type; | |
1499 | lsm.u.id_tracker.id_type = id->type; | |
1500 | switch (id->type) { | |
1501 | case LTTNG_ID_ALL: | |
1502 | break; | |
1503 | case LTTNG_ID_VALUE: | |
1504 | lsm.u.id_tracker.u.value = id->value; | |
1505 | break; | |
1506 | case LTTNG_ID_STRING: | |
1507 | var_data = id->string; | |
1508 | var_data_len = strlen(var_data) + 1; /* Includes \0. */ | |
1509 | lsm.u.id_tracker.u.var_len = var_data_len; | |
1510 | break; | |
1511 | default: | |
1512 | return -LTTNG_ERR_INVALID; | |
1513 | } | |
ccf10263 MD |
1514 | |
1515 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1516 | ||
1517 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1518 | sizeof(lsm.session.name)); | |
1519 | ||
e32d22be MD |
1520 | return lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, |
1521 | var_data, var_data_len, NULL); | |
ccf10263 MD |
1522 | } |
1523 | ||
e32d22be | 1524 | |
ccf10263 | 1525 | /* |
e32d22be | 1526 | * Add ID to session tracker. |
9ae110e2 | 1527 | * Return 0 on success else a negative LTTng error code. |
ccf10263 | 1528 | */ |
e32d22be MD |
1529 | int lttng_track_id(struct lttng_handle *handle, |
1530 | enum lttng_tracker_type tracker_type, | |
1531 | struct lttng_tracker_id *id) | |
ccf10263 | 1532 | { |
e32d22be MD |
1533 | return lttng_track_untrack_id(handle, tracker_type, |
1534 | id, LTTNG_TRACK_ID); | |
1535 | } | |
ccf10263 | 1536 | |
e32d22be MD |
1537 | /* |
1538 | * Remove ID from session tracker. | |
1539 | * Return 0 on success else a negative LTTng error code. | |
1540 | */ | |
1541 | int lttng_untrack_id(struct lttng_handle *handle, | |
1542 | enum lttng_tracker_type tracker_type, | |
1543 | struct lttng_tracker_id *id) | |
1544 | { | |
1545 | return lttng_track_untrack_id(handle, tracker_type, | |
1546 | id, LTTNG_UNTRACK_ID); | |
1547 | } | |
ccf10263 | 1548 | |
e32d22be MD |
1549 | /* |
1550 | * Add PID to session tracker. | |
1551 | * Return 0 on success else a negative LTTng error code. | |
1552 | */ | |
1553 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1554 | { | |
1555 | struct lttng_tracker_id id; | |
ccf10263 | 1556 | |
e32d22be MD |
1557 | id.type = LTTNG_TRACKER_PID; |
1558 | id.value = pid; | |
1559 | return lttng_track_id(handle, LTTNG_TRACKER_PID, &id); | |
1560 | } | |
ccf10263 | 1561 | |
e32d22be MD |
1562 | /* |
1563 | * Remove PID from session tracker. | |
1564 | * Return 0 on success else a negative LTTng error code. | |
1565 | */ | |
1566 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1567 | { | |
1568 | struct lttng_tracker_id id; | |
ccf10263 | 1569 | |
e32d22be MD |
1570 | id.type = LTTNG_TRACKER_PID; |
1571 | id.value = pid; | |
1572 | return lttng_untrack_id(handle, LTTNG_TRACKER_PID, &id); | |
ccf10263 MD |
1573 | } |
1574 | ||
fac6795d | 1575 | /* |
9ae110e2 JG |
1576 | * Lists all available tracepoints of domain. |
1577 | * Sets the contents of the events array. | |
1578 | * Returns the number of lttng_event entries in events; | |
1579 | * on error, returns a negative value. | |
fac6795d | 1580 | */ |
cd80958d | 1581 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1582 | struct lttng_event **events) |
fac6795d | 1583 | { |
052da939 | 1584 | int ret; |
cd80958d DG |
1585 | struct lttcomm_session_msg lsm; |
1586 | ||
9d697d3d | 1587 | if (handle == NULL) { |
2f70b271 | 1588 | return -LTTNG_ERR_INVALID; |
cd80958d | 1589 | } |
fac6795d | 1590 | |
53efb85a | 1591 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1592 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1593 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1594 | |
cac3069d | 1595 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1596 | if (ret < 0) { |
1597 | return ret; | |
eb354453 | 1598 | } |
fac6795d | 1599 | |
9f19cc17 | 1600 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1601 | } |
1602 | ||
f37d259d | 1603 | /* |
9ae110e2 JG |
1604 | * Lists all available tracepoint fields of domain. |
1605 | * Sets the contents of the event field array. | |
1606 | * Returns the number of lttng_event_field entries in events; | |
1607 | * on error, returns a negative value. | |
f37d259d MD |
1608 | */ |
1609 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1610 | struct lttng_event_field **fields) | |
1611 | { | |
1612 | int ret; | |
1613 | struct lttcomm_session_msg lsm; | |
1614 | ||
1615 | if (handle == NULL) { | |
2f70b271 | 1616 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1617 | } |
1618 | ||
53efb85a | 1619 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1620 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1621 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1622 | |
cac3069d | 1623 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1624 | if (ret < 0) { |
1625 | return ret; | |
1626 | } | |
1627 | ||
1628 | return ret / sizeof(struct lttng_event_field); | |
1629 | } | |
1630 | ||
834978fd | 1631 | /* |
9ae110e2 JG |
1632 | * Lists all available kernel system calls. Allocates and sets the contents of |
1633 | * the events array. | |
834978fd | 1634 | * |
9ae110e2 JG |
1635 | * Returns the number of lttng_event entries in events; on error, returns a |
1636 | * negative value. | |
834978fd DG |
1637 | */ |
1638 | int lttng_list_syscalls(struct lttng_event **events) | |
1639 | { | |
1640 | int ret; | |
1641 | struct lttcomm_session_msg lsm; | |
1642 | ||
1643 | if (!events) { | |
1644 | return -LTTNG_ERR_INVALID; | |
1645 | } | |
1646 | ||
1647 | memset(&lsm, 0, sizeof(lsm)); | |
1648 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1649 | /* Force kernel domain for system calls. */ | |
1650 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1651 | ||
1652 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1653 | if (ret < 0) { | |
1654 | return ret; | |
1655 | } | |
1656 | ||
1657 | return ret / sizeof(struct lttng_event); | |
1658 | } | |
1659 | ||
1657e9bb | 1660 | /* |
9ae110e2 JG |
1661 | * Returns a human readable string describing |
1662 | * the error code (a negative value). | |
1657e9bb | 1663 | */ |
9a745bc7 | 1664 | const char *lttng_strerror(int code) |
1657e9bb | 1665 | { |
f73fabfd | 1666 | return error_get_str(code); |
1657e9bb DG |
1667 | } |
1668 | ||
aaf97519 | 1669 | /* |
a4b92340 DG |
1670 | * Create a brand new session using name and url for destination. |
1671 | * | |
f73fabfd | 1672 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1673 | */ |
a4b92340 | 1674 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1675 | { |
3dd05a85 | 1676 | int ret; |
a4b92340 | 1677 | ssize_t size; |
00e2e675 | 1678 | struct lttcomm_session_msg lsm; |
a4b92340 | 1679 | struct lttng_uri *uris = NULL; |
00e2e675 | 1680 | |
a4b92340 | 1681 | if (name == NULL) { |
2f70b271 | 1682 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1683 | } |
1684 | ||
a4b92340 | 1685 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1686 | |
a4b92340 | 1687 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1688 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1689 | |
1690 | /* There should never be a data URL */ | |
bc894455 | 1691 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1692 | if (size < 0) { |
2f70b271 | 1693 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1694 | } |
1695 | ||
a4b92340 DG |
1696 | lsm.u.uri.size = size; |
1697 | ||
795a978d | 1698 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1699 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1700 | |
1701 | free(uris); | |
1702 | return ret; | |
00e2e675 DG |
1703 | } |
1704 | ||
8028d920 | 1705 | /* |
9ae110e2 JG |
1706 | * Destroy session using name. |
1707 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1708 | */ |
8fd2c92c | 1709 | static |
e20ee7c2 | 1710 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 1711 | { |
cd80958d DG |
1712 | struct lttcomm_session_msg lsm; |
1713 | ||
843f5df9 | 1714 | if (session_name == NULL) { |
2f70b271 | 1715 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1716 | } |
1717 | ||
53efb85a | 1718 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1719 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1720 | |
cac3069d DG |
1721 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1722 | sizeof(lsm.session.name)); | |
cd80958d | 1723 | |
cac3069d | 1724 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1725 | } |
1726 | ||
e20ee7c2 JD |
1727 | /* |
1728 | * Stop the session and wait for the data before destroying it | |
1729 | */ | |
1730 | int lttng_destroy_session(const char *session_name) | |
1731 | { | |
1732 | int ret; | |
1733 | ||
1734 | /* | |
1735 | * Stop the tracing and wait for the data. | |
1736 | */ | |
1737 | ret = _lttng_stop_tracing(session_name, 1); | |
1738 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1739 | goto end; | |
1740 | } | |
1741 | ||
1742 | ret = _lttng_destroy_session(session_name); | |
1743 | end: | |
1744 | return ret; | |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | * Destroy the session without waiting for the data. | |
1749 | */ | |
1750 | int lttng_destroy_session_no_wait(const char *session_name) | |
1751 | { | |
1752 | int ret; | |
1753 | ||
1754 | /* | |
1755 | * Stop the tracing without waiting for the data. | |
1756 | * The session might already have been stopped, so just | |
1757 | * skip this error. | |
1758 | */ | |
1759 | ret = _lttng_stop_tracing(session_name, 0); | |
1760 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1761 | goto end; | |
1762 | } | |
1763 | ||
1764 | ret = _lttng_destroy_session(session_name); | |
1765 | end: | |
1766 | return ret; | |
1767 | } | |
1768 | ||
57167058 | 1769 | /* |
9ae110e2 JG |
1770 | * Ask the session daemon for all available sessions. |
1771 | * Sets the contents of the sessions array. | |
1772 | * Returns the number of lttng_session entries in sessions; | |
1773 | * on error, returns a negative value. | |
57167058 | 1774 | */ |
ca95a216 | 1775 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1776 | { |
ca95a216 | 1777 | int ret; |
cd80958d | 1778 | struct lttcomm_session_msg lsm; |
57167058 | 1779 | |
53efb85a | 1780 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1781 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1782 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1783 | if (ret < 0) { |
ca95a216 | 1784 | return ret; |
57167058 DG |
1785 | } |
1786 | ||
ca95a216 | 1787 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1788 | } |
1789 | ||
d7ba1388 MD |
1790 | int lttng_set_session_shm_path(const char *session_name, |
1791 | const char *shm_path) | |
1792 | { | |
1793 | struct lttcomm_session_msg lsm; | |
1794 | ||
1795 | if (session_name == NULL) { | |
1796 | return -LTTNG_ERR_INVALID; | |
1797 | } | |
1798 | ||
1799 | memset(&lsm, 0, sizeof(lsm)); | |
1800 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1801 | ||
1802 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1803 | sizeof(lsm.session.name)); | |
1804 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1805 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1806 | ||
1807 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1808 | } | |
1809 | ||
9f19cc17 | 1810 | /* |
9ae110e2 JG |
1811 | * Ask the session daemon for all available domains of a session. |
1812 | * Sets the contents of the domains array. | |
1813 | * Returns the number of lttng_domain entries in domains; | |
1814 | * on error, returns a negative value. | |
9f19cc17 | 1815 | */ |
330be774 | 1816 | int lttng_list_domains(const char *session_name, |
cd80958d | 1817 | struct lttng_domain **domains) |
9f19cc17 DG |
1818 | { |
1819 | int ret; | |
cd80958d DG |
1820 | struct lttcomm_session_msg lsm; |
1821 | ||
330be774 | 1822 | if (session_name == NULL) { |
2f70b271 | 1823 | return -LTTNG_ERR_INVALID; |
cd80958d | 1824 | } |
9f19cc17 | 1825 | |
53efb85a | 1826 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1827 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1828 | ||
cac3069d DG |
1829 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1830 | sizeof(lsm.session.name)); | |
cd80958d | 1831 | |
cac3069d | 1832 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1833 | if (ret < 0) { |
1834 | return ret; | |
1835 | } | |
1836 | ||
1837 | return ret / sizeof(struct lttng_domain); | |
1838 | } | |
1839 | ||
1840 | /* | |
9ae110e2 JG |
1841 | * Ask the session daemon for all available channels of a session. |
1842 | * Sets the contents of the channels array. | |
1843 | * Returns the number of lttng_channel entries in channels; | |
1844 | * on error, returns a negative value. | |
9f19cc17 | 1845 | */ |
cd80958d DG |
1846 | int lttng_list_channels(struct lttng_handle *handle, |
1847 | struct lttng_channel **channels) | |
9f19cc17 DG |
1848 | { |
1849 | int ret; | |
53e367f9 JG |
1850 | size_t channel_count, i; |
1851 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 1852 | sizeof(struct lttng_channel_extended); |
cd80958d | 1853 | struct lttcomm_session_msg lsm; |
53e367f9 | 1854 | void *extended_at; |
cd80958d | 1855 | |
9d697d3d | 1856 | if (handle == NULL) { |
53e367f9 JG |
1857 | ret = -LTTNG_ERR_INVALID; |
1858 | goto end; | |
cd80958d DG |
1859 | } |
1860 | ||
53efb85a | 1861 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1862 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1863 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1864 | sizeof(lsm.session.name)); |
9f19cc17 | 1865 | |
cac3069d | 1866 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1867 | |
cac3069d | 1868 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 1869 | if (ret < 0) { |
53e367f9 JG |
1870 | goto end; |
1871 | } | |
1872 | ||
1873 | if (ret % channel_size) { | |
1874 | ret = -LTTNG_ERR_UNK; | |
1875 | free(*channels); | |
1876 | *channels = NULL; | |
1877 | goto end; | |
9f19cc17 | 1878 | } |
53e367f9 | 1879 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 1880 | |
53e367f9 JG |
1881 | /* Set extended info pointers */ |
1882 | extended_at = ((void *) *channels) + | |
1883 | channel_count * sizeof(struct lttng_channel); | |
1884 | for (i = 0; i < channel_count; i++) { | |
1885 | struct lttng_channel *chan = &(*channels)[i]; | |
1886 | ||
1887 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 1888 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
1889 | } |
1890 | ||
1891 | ret = (int) channel_count; | |
1892 | end: | |
1893 | return ret; | |
9f19cc17 DG |
1894 | } |
1895 | ||
1896 | /* | |
9ae110e2 JG |
1897 | * Ask the session daemon for all available events of a session channel. |
1898 | * Sets the contents of the events array. | |
1899 | * Returns the number of lttng_event entries in events; | |
1900 | * on error, returns a negative value. | |
9f19cc17 | 1901 | */ |
cd80958d DG |
1902 | int lttng_list_events(struct lttng_handle *handle, |
1903 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1904 | { |
1905 | int ret; | |
cd80958d | 1906 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
1907 | struct lttcomm_event_command_header *cmd_header = NULL; |
1908 | size_t cmd_header_len; | |
1909 | uint32_t nb_events, i; | |
1910 | void *extended_at; | |
9f19cc17 | 1911 | |
9d697d3d DG |
1912 | /* Safety check. An handle and channel name are mandatory */ |
1913 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1914 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1915 | } |
1916 | ||
53efb85a | 1917 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1918 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1919 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1920 | sizeof(lsm.session.name)); |
cac3069d | 1921 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 1922 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 1923 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1924 | |
b4e3ceb9 PP |
1925 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, NULL, 0, (void **) events, |
1926 | (void **) &cmd_header, &cmd_header_len); | |
9f19cc17 | 1927 | if (ret < 0) { |
b4e3ceb9 | 1928 | goto error; |
9f19cc17 DG |
1929 | } |
1930 | ||
b4e3ceb9 PP |
1931 | /* Set number of events and free command header */ |
1932 | nb_events = cmd_header->nb_events; | |
1933 | if (nb_events > INT_MAX) { | |
e32d22be | 1934 | ret = -LTTNG_ERR_OVERFLOW; |
b4e3ceb9 PP |
1935 | goto error; |
1936 | } | |
1937 | ret = (int) nb_events; | |
1938 | free(cmd_header); | |
1939 | cmd_header = NULL; | |
1940 | ||
1941 | /* Set extended info pointers */ | |
1942 | extended_at = ((void*) (*events)) + | |
1943 | nb_events * sizeof(struct lttng_event); | |
1944 | ||
1945 | for (i = 0; i < nb_events; i++) { | |
1946 | struct lttcomm_event_extended_header *ext_header; | |
1947 | struct lttng_event *event = &(*events)[i]; | |
1948 | ||
1949 | event->extended.ptr = extended_at; | |
1950 | ext_header = | |
1951 | (struct lttcomm_event_extended_header *) extended_at; | |
1952 | extended_at += sizeof(*ext_header); | |
1953 | extended_at += ext_header->filter_len; | |
795d57ce PP |
1954 | extended_at += |
1955 | ext_header->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
b4e3ceb9 PP |
1956 | } |
1957 | ||
1958 | return ret; | |
1959 | error: | |
1960 | free(cmd_header); | |
1961 | free(*events); | |
1962 | return ret; | |
9f19cc17 DG |
1963 | } |
1964 | ||
134e72ed JG |
1965 | int lttng_event_get_filter_expression(struct lttng_event *event, |
1966 | const char **filter_expression) | |
d31d3e8c PP |
1967 | { |
1968 | int ret = 0; | |
1969 | struct lttcomm_event_extended_header *ext_header; | |
1970 | ||
134e72ed | 1971 | if (!event || !filter_expression) { |
d31d3e8c PP |
1972 | ret = -LTTNG_ERR_INVALID; |
1973 | goto end; | |
1974 | } | |
1975 | ||
1976 | ext_header = event->extended.ptr; | |
1977 | ||
1978 | if (!ext_header) { | |
1979 | /* | |
1980 | * This can happen since the lttng_event structure is | |
1981 | * used for other tasks where this pointer is never set. | |
1982 | */ | |
134e72ed | 1983 | *filter_expression = NULL; |
d31d3e8c PP |
1984 | goto end; |
1985 | } | |
1986 | ||
1987 | if (ext_header->filter_len) { | |
134e72ed JG |
1988 | *filter_expression = ((const char *) (ext_header)) + |
1989 | sizeof(*ext_header); | |
d31d3e8c | 1990 | } else { |
134e72ed | 1991 | *filter_expression = NULL; |
d31d3e8c PP |
1992 | } |
1993 | ||
1994 | end: | |
1995 | return ret; | |
1996 | } | |
b4e3ceb9 | 1997 | |
f086e50e PP |
1998 | int lttng_event_get_exclusion_name_count(struct lttng_event *event) |
1999 | { | |
2000 | int ret; | |
2001 | struct lttcomm_event_extended_header *ext_header; | |
2002 | ||
2003 | if (!event) { | |
2004 | ret = -LTTNG_ERR_INVALID; | |
2005 | goto end; | |
2006 | } | |
2007 | ||
2008 | ext_header = event->extended.ptr; | |
2009 | if (!ext_header) { | |
2010 | /* | |
2011 | * This can happen since the lttng_event structure is | |
2012 | * used for other tasks where this pointer is never set. | |
2013 | */ | |
2014 | ret = 0; | |
2015 | goto end; | |
2016 | } | |
2017 | ||
2018 | if (ext_header->nb_exclusions > INT_MAX) { | |
2019 | ret = -LTTNG_ERR_OVERFLOW; | |
2020 | goto end; | |
2021 | } | |
2022 | ret = (int) ext_header->nb_exclusions; | |
2023 | end: | |
2024 | return ret; | |
2025 | } | |
2026 | ||
2027 | int lttng_event_get_exclusion_name(struct lttng_event *event, | |
2028 | size_t index, const char **exclusion_name) | |
2029 | { | |
2030 | int ret = 0; | |
2031 | struct lttcomm_event_extended_header *ext_header; | |
2032 | void *at; | |
2033 | ||
2034 | if (!event || !exclusion_name) { | |
2035 | ret = -LTTNG_ERR_INVALID; | |
2036 | goto end; | |
2037 | } | |
2038 | ||
2039 | ext_header = event->extended.ptr; | |
2040 | if (!ext_header) { | |
2041 | ret = -LTTNG_ERR_INVALID; | |
2042 | goto end; | |
2043 | } | |
2044 | ||
2045 | if (index >= ext_header->nb_exclusions) { | |
2046 | ret = -LTTNG_ERR_INVALID; | |
2047 | goto end; | |
2048 | } | |
2049 | ||
2050 | at = (void *) ext_header + sizeof(*ext_header); | |
2051 | at += ext_header->filter_len; | |
2052 | at += index * LTTNG_SYMBOL_NAME_LEN; | |
2053 | *exclusion_name = at; | |
2054 | ||
2055 | end: | |
2056 | return ret; | |
2057 | } | |
2058 | ||
fac6795d | 2059 | /* |
1c8d13c8 TD |
2060 | * Sets the tracing_group variable with name. |
2061 | * This function allocates memory pointed to by tracing_group. | |
2062 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2063 | */ |
2064 | int lttng_set_tracing_group(const char *name) | |
2065 | { | |
9d697d3d | 2066 | if (name == NULL) { |
2f70b271 | 2067 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2068 | } |
2069 | ||
fac6795d | 2070 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2071 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2072 | } |
2073 | ||
2074 | return 0; | |
2075 | } | |
2076 | ||
cd80958d | 2077 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2078 | struct lttng_calibrate *calibrate) |
2079 | { | |
b812e5ca PP |
2080 | /* |
2081 | * This command was removed in LTTng 2.9. | |
2082 | */ | |
2083 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2084 | } |
2085 | ||
5edd7e09 DG |
2086 | /* |
2087 | * Set default channel attributes. | |
441c16a7 | 2088 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2089 | */ |
2090 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2091 | struct lttng_channel_attr *attr) | |
2092 | { | |
294851b0 | 2093 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2094 | |
5edd7e09 DG |
2095 | /* Safety check */ |
2096 | if (attr == NULL || domain == NULL) { | |
2097 | return; | |
2098 | } | |
2099 | ||
294851b0 | 2100 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2101 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2102 | ||
0a9c6494 DG |
2103 | /* Same for all domains. */ |
2104 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2105 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2106 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2107 | ||
5edd7e09 DG |
2108 | switch (domain->type) { |
2109 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2110 | attr->switch_timer_interval = |
2111 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2112 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2113 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2114 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2115 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2116 | if (extended) { |
2117 | extended->monitor_timer_interval = | |
2118 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2119 | extended->blocking_timeout = |
2120 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2121 | } |
5edd7e09 DG |
2122 | break; |
2123 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2124 | switch (domain->buf_type) { |
2125 | case LTTNG_BUFFER_PER_UID: | |
2126 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2127 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2128 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2129 | attr->switch_timer_interval = |
2130 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2131 | attr->read_timer_interval = | |
2132 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2133 | if (extended) { |
2134 | extended->monitor_timer_interval = | |
2135 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2136 | extended->blocking_timeout = |
2137 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2138 | } |
0a9c6494 DG |
2139 | break; |
2140 | case LTTNG_BUFFER_PER_PID: | |
2141 | default: | |
2142 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2143 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2144 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2145 | attr->switch_timer_interval = |
2146 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2147 | attr->read_timer_interval = | |
2148 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2149 | if (extended) { |
2150 | extended->monitor_timer_interval = | |
2151 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2152 | extended->blocking_timeout = |
2153 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2154 | } |
0a9c6494 DG |
2155 | break; |
2156 | } | |
5edd7e09 | 2157 | default: |
441c16a7 | 2158 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2159 | break; |
2160 | } | |
cf0bcb51 JG |
2161 | |
2162 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2163 | } |
2164 | ||
5ba3702f JG |
2165 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2166 | uint64_t *discarded_events) | |
2167 | { | |
2168 | int ret = 0; | |
cf0bcb51 | 2169 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2170 | |
2171 | if (!channel || !discarded_events) { | |
2172 | ret = -LTTNG_ERR_INVALID; | |
2173 | goto end; | |
2174 | } | |
2175 | ||
2176 | chan_ext = channel->attr.extended.ptr; | |
2177 | if (!chan_ext) { | |
2178 | /* | |
2179 | * This can happen since the lttng_channel structure is | |
2180 | * used for other tasks where this pointer is never set. | |
2181 | */ | |
2182 | *discarded_events = 0; | |
2183 | goto end; | |
2184 | } | |
2185 | ||
2186 | *discarded_events = chan_ext->discarded_events; | |
2187 | end: | |
2188 | return ret; | |
2189 | } | |
2190 | ||
2191 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2192 | uint64_t *lost_packets) | |
2193 | { | |
2194 | int ret = 0; | |
cf0bcb51 | 2195 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2196 | |
2197 | if (!channel || !lost_packets) { | |
2198 | ret = -LTTNG_ERR_INVALID; | |
2199 | goto end; | |
2200 | } | |
2201 | ||
2202 | chan_ext = channel->attr.extended.ptr; | |
2203 | if (!chan_ext) { | |
2204 | /* | |
2205 | * This can happen since the lttng_channel structure is | |
2206 | * used for other tasks where this pointer is never set. | |
2207 | */ | |
2208 | *lost_packets = 0; | |
2209 | goto end; | |
2210 | } | |
2211 | ||
2212 | *lost_packets = chan_ext->lost_packets; | |
2213 | end: | |
2214 | return ret; | |
2215 | } | |
2216 | ||
cf0bcb51 JG |
2217 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2218 | uint64_t *monitor_timer_interval) | |
2219 | { | |
2220 | int ret = 0; | |
2221 | ||
2222 | if (!chan || !monitor_timer_interval) { | |
2223 | ret = -LTTNG_ERR_INVALID; | |
2224 | goto end; | |
2225 | } | |
2226 | ||
2227 | if (!chan->attr.extended.ptr) { | |
2228 | ret = -LTTNG_ERR_INVALID; | |
2229 | goto end; | |
2230 | } | |
2231 | ||
2232 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2233 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2234 | end: | |
2235 | return ret; | |
2236 | } | |
2237 | ||
2238 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2239 | uint64_t monitor_timer_interval) | |
2240 | { | |
2241 | int ret = 0; | |
2242 | ||
2243 | if (!chan || !chan->attr.extended.ptr) { | |
2244 | ret = -LTTNG_ERR_INVALID; | |
2245 | goto end; | |
2246 | } | |
2247 | ||
2248 | ((struct lttng_channel_extended *) | |
2249 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2250 | monitor_timer_interval; | |
2251 | end: | |
2252 | return ret; | |
2253 | } | |
2254 | ||
491d1539 MD |
2255 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2256 | int64_t *blocking_timeout) | |
2257 | { | |
2258 | int ret = 0; | |
2259 | ||
2260 | if (!chan || !blocking_timeout) { | |
2261 | ret = -LTTNG_ERR_INVALID; | |
2262 | goto end; | |
2263 | } | |
2264 | ||
2265 | if (!chan->attr.extended.ptr) { | |
2266 | ret = -LTTNG_ERR_INVALID; | |
2267 | goto end; | |
2268 | } | |
2269 | ||
2270 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2271 | chan->attr.extended.ptr)->blocking_timeout; | |
2272 | end: | |
2273 | return ret; | |
2274 | } | |
2275 | ||
2276 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2277 | int64_t blocking_timeout) | |
2278 | { | |
2279 | int ret = 0; | |
2280 | int64_t msec_timeout; | |
2281 | ||
2282 | if (!chan || !chan->attr.extended.ptr) { | |
2283 | ret = -LTTNG_ERR_INVALID; | |
2284 | goto end; | |
2285 | } | |
2286 | ||
2287 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2288 | ret = -LTTNG_ERR_INVALID; | |
2289 | goto end; | |
2290 | } | |
2291 | ||
2292 | /* | |
2293 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2294 | * us to accept a narrower range of values (msecs expressed as a signed | |
2295 | * 32-bit integer). | |
2296 | */ | |
2297 | msec_timeout = blocking_timeout / 1000; | |
2298 | if (msec_timeout != (int32_t) msec_timeout) { | |
2299 | ret = -LTTNG_ERR_INVALID; | |
2300 | goto end; | |
2301 | } | |
2302 | ||
2303 | ((struct lttng_channel_extended *) | |
2304 | chan->attr.extended.ptr)->blocking_timeout = | |
2305 | blocking_timeout; | |
2306 | end: | |
2307 | return ret; | |
2308 | } | |
2309 | ||
fac6795d | 2310 | /* |
2269e89e | 2311 | * Check if session daemon is alive. |
fac6795d | 2312 | * |
2269e89e | 2313 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2314 | * On error returns a negative value. |
fac6795d | 2315 | */ |
947308c4 | 2316 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2317 | { |
2318 | int ret; | |
2319 | ||
2320 | ret = set_session_daemon_path(); | |
2321 | if (ret < 0) { | |
9ae110e2 | 2322 | /* Error. */ |
fac6795d DG |
2323 | return ret; |
2324 | } | |
2325 | ||
9d035200 | 2326 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2327 | /* |
9ae110e2 JG |
2328 | * No socket path set. Weird error which means the constructor |
2329 | * was not called. | |
2f70b271 DG |
2330 | */ |
2331 | assert(0); | |
fac6795d DG |
2332 | } |
2333 | ||
2269e89e | 2334 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2335 | if (ret < 0) { |
9ae110e2 | 2336 | /* Not alive. */ |
7d8234d9 MD |
2337 | return 0; |
2338 | } | |
7d8234d9 | 2339 | |
9ae110e2 | 2340 | /* Is alive. */ |
947308c4 | 2341 | return 1; |
fac6795d DG |
2342 | } |
2343 | ||
00e2e675 | 2344 | /* |
a4b92340 | 2345 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2346 | * |
2347 | * Return 0 on success, else a negative value. | |
2348 | */ | |
a4b92340 DG |
2349 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2350 | const char *control_url, const char *data_url) | |
00e2e675 | 2351 | { |
3dd05a85 | 2352 | int ret; |
a4b92340 | 2353 | ssize_t size; |
00e2e675 | 2354 | struct lttcomm_session_msg lsm; |
a4b92340 | 2355 | struct lttng_uri *uris = NULL; |
00e2e675 | 2356 | |
a4b92340 | 2357 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2358 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2359 | } |
2360 | ||
a4b92340 DG |
2361 | memset(&lsm, 0, sizeof(lsm)); |
2362 | ||
00e2e675 DG |
2363 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2364 | ||
cac3069d | 2365 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2366 | sizeof(lsm.session.name)); |
cac3069d | 2367 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2368 | |
bc894455 | 2369 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2370 | if (size < 0) { |
2f70b271 | 2371 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2372 | } |
2373 | ||
2374 | lsm.u.uri.size = size; | |
00e2e675 | 2375 | |
795a978d | 2376 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2377 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2378 | |
2379 | free(uris); | |
2380 | return ret; | |
00e2e675 DG |
2381 | } |
2382 | ||
2383 | /* | |
9c6bda17 | 2384 | * [OBSOLETE] |
00e2e675 DG |
2385 | */ |
2386 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2387 | { | |
785d2d0d | 2388 | return -ENOSYS; |
00e2e675 DG |
2389 | } |
2390 | ||
2391 | /* | |
9c6bda17 | 2392 | * [OBSOLETE] |
00e2e675 DG |
2393 | */ |
2394 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2395 | { | |
785d2d0d | 2396 | return -ENOSYS; |
00e2e675 DG |
2397 | } |
2398 | ||
07424f16 DG |
2399 | /* |
2400 | * This is an extension of create session that is ONLY and SHOULD only be used | |
2401 | * by the lttng command line program. It exists to avoid using URI parsing in | |
2402 | * the lttng client. | |
2403 | * | |
2404 | * We need the date and time for the trace path subdirectory for the case where | |
2405 | * the user does NOT define one using either -o or -U. Using the normal | |
2406 | * lttng_create_session API call, we have no clue on the session daemon side if | |
2407 | * the URL was generated automatically by the client or define by the user. | |
2408 | * | |
2409 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
2410 | * string and appends it if necessary to the URI subdirectory before sending it | |
2411 | * to the session daemon. | |
2412 | * | |
2413 | * With this extra function, the lttng_create_session call behavior is not | |
2414 | * changed and the timestamp is appended to the URI on the session daemon side | |
2415 | * if necessary. | |
2416 | */ | |
2417 | int _lttng_create_session_ext(const char *name, const char *url, | |
2418 | const char *datetime) | |
2419 | { | |
3dd05a85 | 2420 | int ret; |
07424f16 DG |
2421 | ssize_t size; |
2422 | struct lttcomm_session_msg lsm; | |
2423 | struct lttng_uri *uris = NULL; | |
2424 | ||
2bba9e53 | 2425 | if (name == NULL || datetime == NULL) { |
2f70b271 | 2426 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
2427 | } |
2428 | ||
2429 | memset(&lsm, 0, sizeof(lsm)); | |
2430 | ||
2431 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 2432 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 | 2433 | |
9ae110e2 | 2434 | /* There should never be a data URL. */ |
bc894455 | 2435 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 2436 | if (size < 0) { |
3dd05a85 DG |
2437 | ret = -LTTNG_ERR_INVALID; |
2438 | goto error; | |
07424f16 DG |
2439 | } |
2440 | ||
2441 | lsm.u.uri.size = size; | |
2442 | ||
4b35a6b3 | 2443 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
2444 | /* Don't append datetime if the name was automatically created. */ |
2445 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
2446 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
2447 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
2448 | name, datetime); | |
2449 | } else { | |
2450 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2451 | } | |
07424f16 DG |
2452 | if (ret < 0) { |
2453 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
2454 | ret = -LTTNG_ERR_FATAL; |
2455 | goto error; | |
07424f16 DG |
2456 | } |
2457 | } | |
2458 | ||
795a978d | 2459 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2460 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2461 | |
2462 | error: | |
2463 | free(uris); | |
2464 | return ret; | |
07424f16 DG |
2465 | } |
2466 | ||
806e2684 DG |
2467 | /* |
2468 | * For a given session name, this call checks if the data is ready to be read | |
2469 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2470 | * any readers. | |
2471 | */ | |
6d805429 | 2472 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2473 | { |
2474 | int ret; | |
2475 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2476 | uint8_t *pending = NULL; |
806e2684 DG |
2477 | |
2478 | if (session_name == NULL) { | |
2479 | return -LTTNG_ERR_INVALID; | |
2480 | } | |
2481 | ||
53efb85a | 2482 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2483 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2484 | |
cac3069d DG |
2485 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2486 | sizeof(lsm.session.name)); | |
806e2684 | 2487 | |
f6151c55 JG |
2488 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2489 | if (ret < 0) { | |
2490 | goto end; | |
2491 | } else if (ret != 1) { | |
2492 | /* Unexpected payload size */ | |
2493 | ret = -LTTNG_ERR_INVALID; | |
2494 | goto end; | |
806e2684 DG |
2495 | } |
2496 | ||
f6151c55 JG |
2497 | ret = (int) *pending; |
2498 | end: | |
2499 | free(pending); | |
806e2684 DG |
2500 | return ret; |
2501 | } | |
2502 | ||
27babd3a DG |
2503 | /* |
2504 | * Create a session exclusively used for snapshot. | |
2505 | * | |
2506 | * Returns LTTNG_OK on success or a negative error code. | |
2507 | */ | |
2508 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2509 | { | |
2510 | int ret; | |
2511 | ssize_t size; | |
2512 | struct lttcomm_session_msg lsm; | |
2513 | struct lttng_uri *uris = NULL; | |
2514 | ||
2515 | if (name == NULL) { | |
2516 | return -LTTNG_ERR_INVALID; | |
2517 | } | |
2518 | ||
2519 | memset(&lsm, 0, sizeof(lsm)); | |
2520 | ||
2521 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
2522 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2523 | ||
2524 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2525 | if (size < 0) { | |
2526 | return -LTTNG_ERR_INVALID; | |
2527 | } | |
2528 | ||
2529 | lsm.u.uri.size = size; | |
2530 | ||
10d65351 JD |
2531 | /* |
2532 | * If the user does not specify a custom subdir, use the session name. | |
2533 | */ | |
2534 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { | |
2535 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2536 | if (ret < 0) { | |
2537 | PERROR("snprintf uri subdir"); | |
2538 | ret = -LTTNG_ERR_FATAL; | |
2539 | goto error; | |
2540 | } | |
2541 | } | |
2542 | ||
795a978d | 2543 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
27babd3a DG |
2544 | sizeof(struct lttng_uri) * size, NULL); |
2545 | ||
10d65351 | 2546 | error: |
27babd3a DG |
2547 | free(uris); |
2548 | return ret; | |
2549 | } | |
2550 | ||
ecc48a90 JD |
2551 | /* |
2552 | * Create a session exclusively used for live. | |
2553 | * | |
2554 | * Returns LTTNG_OK on success or a negative error code. | |
2555 | */ | |
2556 | int lttng_create_session_live(const char *name, const char *url, | |
2557 | unsigned int timer_interval) | |
2558 | { | |
2559 | int ret; | |
2560 | ssize_t size; | |
2561 | struct lttcomm_session_msg lsm; | |
2562 | struct lttng_uri *uris = NULL; | |
2563 | ||
92805ee4 | 2564 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
2565 | return -LTTNG_ERR_INVALID; |
2566 | } | |
2567 | ||
2568 | memset(&lsm, 0, sizeof(lsm)); | |
2569 | ||
2570 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
2571 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2572 | ||
1a241656 DG |
2573 | if (url) { |
2574 | size = uri_parse_str_urls(url, NULL, &uris); | |
2575 | if (size <= 0) { | |
2576 | ret = -LTTNG_ERR_INVALID; | |
2577 | goto end; | |
2578 | } | |
ecc48a90 | 2579 | |
1a241656 DG |
2580 | /* file:// is not accepted for live session. */ |
2581 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
2582 | ret = -LTTNG_ERR_INVALID; | |
2583 | goto end; | |
2584 | } | |
2585 | } else { | |
2586 | size = 0; | |
ecc48a90 JD |
2587 | } |
2588 | ||
2589 | lsm.u.session_live.nb_uri = size; | |
2590 | lsm.u.session_live.timer_interval = timer_interval; | |
2591 | ||
795a978d | 2592 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
ecc48a90 JD |
2593 | sizeof(struct lttng_uri) * size, NULL); |
2594 | ||
2595 | end: | |
2596 | free(uris); | |
2597 | return ret; | |
2598 | } | |
2599 | ||
a5dfbb9d | 2600 | /* |
e32d22be | 2601 | * List IDs in the tracker. |
a5dfbb9d | 2602 | * |
e32d22be MD |
2603 | * tracker_type is the type of tracker. |
2604 | * ids is set to an allocated array of IDs currently tracked. On | |
2605 | * success, ids and all the strings it contains must be freed by the caller. | |
2606 | * nr_ids is set to the number of entries contained by the ids array. | |
a5dfbb9d MD |
2607 | * |
2608 | * Returns 0 on success, else a negative LTTng error code. | |
2609 | */ | |
e32d22be MD |
2610 | int lttng_list_tracker_ids(struct lttng_handle *handle, |
2611 | enum lttng_tracker_type tracker_type, | |
2612 | struct lttng_tracker_id **_ids, size_t *_nr_ids) | |
a5dfbb9d | 2613 | { |
e32d22be | 2614 | int ret, i; |
a5dfbb9d | 2615 | struct lttcomm_session_msg lsm; |
e32d22be MD |
2616 | struct lttcomm_tracker_command_header *cmd_header = NULL; |
2617 | char *cmd_payload = NULL, *p; | |
2618 | size_t cmd_header_len; | |
2619 | size_t nr_ids = 0; | |
2620 | struct lttng_tracker_id *ids = NULL; | |
a5dfbb9d MD |
2621 | |
2622 | if (handle == NULL) { | |
2623 | return -LTTNG_ERR_INVALID; | |
2624 | } | |
2625 | ||
2626 | memset(&lsm, 0, sizeof(lsm)); | |
e32d22be MD |
2627 | lsm.cmd_type = LTTNG_LIST_TRACKER_IDS; |
2628 | lsm.u.id_tracker_list.tracker_type = tracker_type; | |
a5dfbb9d MD |
2629 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
2630 | sizeof(lsm.session.name)); | |
2631 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2632 | ||
e32d22be MD |
2633 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, NULL, 0, (void **) &cmd_payload, |
2634 | (void **) &cmd_header, &cmd_header_len); | |
a5dfbb9d | 2635 | if (ret < 0) { |
e32d22be MD |
2636 | goto error; |
2637 | } | |
2638 | ||
2639 | /* Set number of tracker_id and free command header */ | |
2640 | nr_ids = cmd_header->nb_tracker_id; | |
2641 | if (nr_ids > INT_MAX) { | |
2642 | ret = -LTTNG_ERR_OVERFLOW; | |
2643 | goto error; | |
2644 | } | |
2645 | free(cmd_header); | |
2646 | cmd_header = NULL; | |
2647 | ||
2648 | ids = zmalloc(sizeof(*ids) * nr_ids); | |
2649 | if (!ids) { | |
2650 | ret = -LTTNG_ERR_NOMEM; | |
2651 | goto error; | |
2652 | } | |
2653 | ||
2654 | p = cmd_payload; | |
2655 | for (i = 0; i < nr_ids; i++) { | |
2656 | struct lttcomm_tracker_id_header *tracker_id; | |
2657 | struct lttng_tracker_id *id; | |
2658 | ||
2659 | tracker_id = (struct lttcomm_tracker_id_header *) p; | |
2660 | p += sizeof(struct lttcomm_tracker_id_header); | |
2661 | id = &ids[i]; | |
2662 | ||
2663 | id->type = tracker_id->type; | |
2664 | switch (tracker_id->type) { | |
2665 | case LTTNG_ID_ALL: | |
2666 | break; | |
2667 | case LTTNG_ID_VALUE: | |
2668 | id->value = tracker_id->u.value; | |
2669 | break; | |
2670 | case LTTNG_ID_STRING: | |
2671 | id->string = strdup(p); | |
2672 | if (!id->string) { | |
2673 | ret = -LTTNG_ERR_NOMEM; | |
2674 | goto error; | |
2675 | } | |
2676 | p += tracker_id->u.var_data_len; | |
2677 | break; | |
2678 | default: | |
2679 | goto error; | |
2680 | } | |
2681 | } | |
2682 | free(cmd_payload); | |
2683 | *_ids = ids; | |
2684 | *_nr_ids = nr_ids; | |
2685 | return 0; | |
2686 | ||
2687 | error: | |
2688 | if (ids) { | |
2689 | for (i = 0; i < nr_ids; i++) { | |
2690 | free(ids[i].string); | |
2691 | } | |
2692 | free(ids); | |
2693 | } | |
2694 | free(cmd_payload); | |
2695 | free(cmd_header); | |
2696 | return ret; | |
2697 | } | |
2698 | ||
2699 | /* | |
2700 | * List PIDs in the tracker. | |
2701 | * | |
2702 | * enabled is set to whether the PID tracker is enabled. | |
2703 | * pids is set to an allocated array of PIDs currently tracked. On | |
2704 | * success, pids must be freed by the caller. | |
2705 | * nr_pids is set to the number of entries contained by the pids array. | |
2706 | * | |
2707 | * Returns 0 on success, else a negative LTTng error code. | |
2708 | */ | |
2709 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2710 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2711 | { | |
2712 | struct lttng_tracker_id *ids = NULL; | |
2713 | size_t nr_ids = 0; | |
2714 | int *pids = NULL; | |
2715 | int ret = 0, i; | |
2716 | ||
2717 | ret = lttng_list_tracker_ids(handle, LTTNG_TRACKER_PID, | |
2718 | &ids, &nr_ids); | |
2719 | if (ret < 0) | |
a5dfbb9d | 2720 | return ret; |
e32d22be MD |
2721 | |
2722 | if (nr_ids == 1 && ids[0].type == LTTNG_ID_ALL) { | |
2723 | *_enabled = 0; | |
2724 | goto end; | |
a5dfbb9d | 2725 | } |
e32d22be MD |
2726 | *_enabled = 1; |
2727 | ||
2728 | pids = zmalloc(nr_ids * sizeof(*pids)); | |
2729 | if (!pids) { | |
2730 | ret = -LTTNG_ERR_NOMEM; | |
2731 | goto end; | |
2732 | } | |
2733 | for (i = 0; i < nr_ids; i++) { | |
2734 | struct lttng_tracker_id *id = &ids[i]; | |
2735 | ||
2736 | if (id->type != LTTNG_ID_VALUE) { | |
2737 | ret = -LTTNG_ERR_UNK; | |
2738 | goto end; | |
2739 | } | |
2740 | pids[i] = id->value; | |
a5dfbb9d | 2741 | } |
a5dfbb9d | 2742 | *_pids = pids; |
e32d22be MD |
2743 | *_nr_pids = nr_ids; |
2744 | end: | |
2745 | for (i = 0; i < nr_ids; i++) { | |
2746 | free(ids[i].string); | |
2747 | } | |
2748 | free(ids); | |
2749 | if (ret < 0) { | |
2750 | free(pids); | |
2751 | } | |
2752 | return ret; | |
a5dfbb9d MD |
2753 | } |
2754 | ||
93ec662e JD |
2755 | /* |
2756 | * Regenerate the metadata for a session. | |
2757 | * Return 0 on success, a negative error code on error. | |
2758 | */ | |
eded6438 | 2759 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2760 | { |
2761 | int ret; | |
2762 | struct lttcomm_session_msg lsm; | |
2763 | ||
2764 | if (!session_name) { | |
2765 | ret = -LTTNG_ERR_INVALID; | |
2766 | goto end; | |
2767 | } | |
2768 | ||
2769 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2770 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2771 | |
2772 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2773 | sizeof(lsm.session.name)); | |
2774 | ||
2775 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2776 | if (ret < 0) { | |
2777 | goto end; | |
2778 | } | |
2779 | ||
2780 | ret = 0; | |
2781 | end: | |
2782 | return ret; | |
2783 | } | |
2784 | ||
eded6438 JD |
2785 | /* |
2786 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2787 | */ | |
2788 | int lttng_metadata_regenerate(const char *session_name) | |
2789 | { | |
2790 | return lttng_regenerate_metadata(session_name); | |
2791 | } | |
2792 | ||
c2561365 JD |
2793 | /* |
2794 | * Regenerate the statedump of a session. | |
2795 | * Return 0 on success, a negative error code on error. | |
2796 | */ | |
2797 | int lttng_regenerate_statedump(const char *session_name) | |
2798 | { | |
2799 | int ret; | |
2800 | struct lttcomm_session_msg lsm; | |
2801 | ||
2802 | if (!session_name) { | |
2803 | ret = -LTTNG_ERR_INVALID; | |
2804 | goto end; | |
2805 | } | |
2806 | ||
2807 | memset(&lsm, 0, sizeof(lsm)); | |
2808 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2809 | ||
2810 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2811 | sizeof(lsm.session.name)); | |
2812 | ||
2813 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2814 | if (ret < 0) { | |
2815 | goto end; | |
2816 | } | |
2817 | ||
2818 | ret = 0; | |
2819 | end: | |
2820 | return ret; | |
2821 | } | |
2822 | ||
a58c490f JG |
2823 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2824 | { | |
2825 | int ret; | |
2826 | struct lttcomm_session_msg lsm; | |
2827 | char *trigger_buf = NULL; | |
2828 | ssize_t trigger_size; | |
2829 | ||
2830 | if (!trigger) { | |
2831 | ret = -LTTNG_ERR_INVALID; | |
2832 | goto end; | |
2833 | } | |
2834 | ||
2835 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 2836 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2837 | goto end; |
2838 | } | |
2839 | ||
2840 | trigger_size = lttng_trigger_serialize(trigger, NULL); | |
2841 | if (trigger_size < 0) { | |
2842 | ret = -LTTNG_ERR_UNK; | |
2843 | goto end; | |
2844 | } | |
2845 | ||
2846 | trigger_buf = zmalloc(trigger_size); | |
2847 | if (!trigger_buf) { | |
2848 | ret = -LTTNG_ERR_NOMEM; | |
2849 | goto end; | |
2850 | } | |
2851 | ||
2852 | memset(&lsm, 0, sizeof(lsm)); | |
2853 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
2854 | if (lttng_trigger_serialize(trigger, trigger_buf) < 0) { | |
2855 | ret = -LTTNG_ERR_UNK; | |
2856 | goto end; | |
2857 | } | |
2858 | ||
2859 | lsm.u.trigger.length = (uint32_t) trigger_size; | |
2860 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, trigger_buf, | |
2861 | trigger_size, NULL); | |
2862 | end: | |
2863 | free(trigger_buf); | |
2864 | return ret; | |
2865 | } | |
2866 | ||
2867 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
2868 | { | |
2869 | int ret; | |
2870 | struct lttcomm_session_msg lsm; | |
2871 | char *trigger_buf = NULL; | |
2872 | ssize_t trigger_size; | |
2873 | ||
2874 | if (!trigger) { | |
2875 | ret = -LTTNG_ERR_INVALID; | |
2876 | goto end; | |
2877 | } | |
2878 | ||
2879 | if (!lttng_trigger_validate(trigger)) { | |
2880 | ret = -LTTNG_ERR_INVALID; | |
2881 | goto end; | |
2882 | } | |
2883 | ||
2884 | trigger_size = lttng_trigger_serialize(trigger, NULL); | |
2885 | if (trigger_size < 0) { | |
2886 | ret = -LTTNG_ERR_UNK; | |
2887 | goto end; | |
2888 | } | |
2889 | ||
2890 | trigger_buf = zmalloc(trigger_size); | |
2891 | if (!trigger_buf) { | |
2892 | ret = -LTTNG_ERR_NOMEM; | |
2893 | goto end; | |
2894 | } | |
2895 | ||
2896 | memset(&lsm, 0, sizeof(lsm)); | |
2897 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
2898 | if (lttng_trigger_serialize(trigger, trigger_buf) < 0) { | |
2899 | ret = -LTTNG_ERR_UNK; | |
2900 | goto end; | |
2901 | } | |
2902 | ||
2903 | lsm.u.trigger.length = (uint32_t) trigger_size; | |
2904 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, trigger_buf, | |
2905 | trigger_size, NULL); | |
2906 | end: | |
2907 | free(trigger_buf); | |
2908 | return ret; | |
2909 | } | |
2910 | ||
d68c9a04 JD |
2911 | int lttng_session_get_current_archive_location(const char *session_name, |
2912 | char **chunk_path) | |
2913 | { | |
2914 | struct lttcomm_session_msg lsm; | |
2915 | struct lttng_session_get_current_output_return *output_return = NULL; | |
2916 | int ret; | |
2917 | size_t path_len; | |
2918 | ||
2919 | memset(&lsm, 0, sizeof(lsm)); | |
2920 | lsm.cmd_type = LTTNG_SESSION_GET_CURRENT_OUTPUT; | |
2921 | ret = lttng_strncpy(lsm.session.name, session_name, | |
2922 | sizeof(lsm.session.name)); | |
2923 | if (ret) { | |
2924 | ret = -LTTNG_ERR_INVALID; | |
2925 | goto end; | |
2926 | } | |
2927 | ||
2928 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &output_return); | |
2929 | if (ret < 0) { | |
2930 | ret = -1; | |
2931 | goto end; | |
2932 | } | |
2933 | ||
2934 | path_len = lttng_strnlen(output_return->path, | |
2935 | sizeof(output_return->path)); | |
2936 | if (path_len == 0 || path_len == sizeof(output_return->path)) { | |
2937 | ret = -LTTNG_ERR_NO_SESSION_OUTPUT; | |
2938 | goto end; | |
2939 | } | |
2940 | ||
2941 | *chunk_path = zmalloc(path_len + 1); | |
2942 | if (!*chunk_path) { | |
2943 | ret = -1; | |
2944 | goto end; | |
2945 | } | |
2946 | memcpy(*chunk_path, output_return->path, path_len); | |
2947 | ||
2948 | ret = 0; | |
2949 | ||
2950 | end: | |
2951 | free(output_return); | |
2952 | return ret; | |
2953 | } | |
2954 | ||
fac6795d | 2955 | /* |
9ae110e2 | 2956 | * lib constructor. |
fac6795d | 2957 | */ |
b2b89e8a | 2958 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
2959 | { |
2960 | /* Set default session group */ | |
bbccc3d2 | 2961 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2962 | } |
49cca668 DG |
2963 | |
2964 | /* | |
9ae110e2 | 2965 | * lib destructor. |
49cca668 | 2966 | */ |
b2b89e8a | 2967 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
2968 | { |
2969 | free(tracing_group); | |
2970 | } |