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. */ | |
800 | if (ev->name[0] != '*') { | |
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 | } | |
9ae110e2 | 923 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
924 | ret = filter_visitor_ir_validate_string(ctx); |
925 | if (ret) { | |
926 | ret = -LTTNG_ERR_FILTER_INVAL; | |
927 | goto parse_error; | |
928 | } | |
137b9942 DG |
929 | dbg_printf("done\n"); |
930 | ||
931 | dbg_printf("Generating bytecode... "); | |
932 | fflush(stdout); | |
933 | ret = filter_visitor_bytecode_generate(ctx); | |
934 | if (ret) { | |
935 | fprintf(stderr, "Generate bytecode error\n"); | |
936 | ret = -LTTNG_ERR_FILTER_INVAL; | |
937 | goto parse_error; | |
938 | } | |
939 | dbg_printf("done\n"); | |
940 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
941 | bytecode_get_len(&ctx->bytecode->b)); | |
942 | ||
943 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
944 | + bytecode_get_len(&ctx->bytecode->b); | |
945 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
946 | ||
947 | /* No need to keep the memory stream. */ | |
948 | if (fclose(fmem) != 0) { | |
6f04ed72 | 949 | PERROR("fclose"); |
137b9942 DG |
950 | } |
951 | ||
952 | *ctxp = ctx; | |
953 | return 0; | |
954 | ||
955 | parse_error: | |
137b9942 DG |
956 | filter_ir_free(ctx); |
957 | filter_parser_ctx_free(ctx); | |
958 | filter_alloc_error: | |
959 | if (fclose(fmem) != 0) { | |
6f04ed72 | 960 | PERROR("fclose"); |
137b9942 DG |
961 | } |
962 | error: | |
963 | return ret; | |
964 | } | |
965 | ||
93deb080 JI |
966 | /* |
967 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
968 | * If no event name is specified, all events are enabled. | |
969 | * If no channel name is specified, the default name is used. | |
970 | * If filter expression is not NULL, the filter is set for the event. | |
971 | * If exclusion count is not zero, the exclusions are set for the event. | |
972 | * Returns size of returned session payload data or a negative error code. | |
973 | */ | |
974 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
975 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 976 | const char *original_filter_expression, |
93deb080 JI |
977 | int exclusion_count, char **exclusion_list) |
978 | { | |
979 | struct lttcomm_session_msg lsm; | |
64226865 | 980 | char *varlen_data; |
93deb080 | 981 | int ret = 0; |
137b9942 | 982 | unsigned int free_filter_expression = 0; |
93deb080 | 983 | struct filter_parser_ctx *ctx = NULL; |
e9efbcd3 JG |
984 | /* |
985 | * Cast as non-const since we may replace the filter expression | |
986 | * by a dynamically allocated string. Otherwise, the original | |
987 | * string is not modified. | |
988 | */ | |
989 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
990 | |
991 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
992 | ret = -LTTNG_ERR_INVALID; |
993 | goto error; | |
93deb080 JI |
994 | } |
995 | ||
9ae110e2 JG |
996 | /* |
997 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
998 | * anyway, so treat this corner-case early to eliminate |
999 | * lttng_fmemopen error for 0-byte allocation. | |
1000 | */ | |
1001 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1002 | ret = -LTTNG_ERR_INVALID; |
1003 | goto error; | |
93deb080 JI |
1004 | } |
1005 | ||
1006 | memset(&lsm, 0, sizeof(lsm)); | |
1007 | ||
1008 | /* If no channel name, send empty string. */ | |
1009 | if (channel_name == NULL) { | |
1010 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1011 | sizeof(lsm.u.enable.channel_name)); | |
1012 | } else { | |
1013 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1014 | sizeof(lsm.u.enable.channel_name)); | |
1015 | } | |
1016 | ||
18a720cd MD |
1017 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1018 | if (ev->name[0] == '\0') { | |
1019 | /* Enable all events */ | |
1020 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1021 | } |
93deb080 | 1022 | |
6565421f | 1023 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1024 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1025 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1026 | ||
1027 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1028 | sizeof(lsm.session.name)); | |
1029 | lsm.u.enable.exclusion_count = exclusion_count; | |
1030 | lsm.u.enable.bytecode_len = 0; | |
1031 | ||
9b21e6d5 DG |
1032 | /* |
1033 | * For the JUL domain, a filter is enforced except for the enable all | |
1034 | * event. This is done to avoid having the event in all sessions thus | |
1035 | * filtering by logger name. | |
1036 | */ | |
1037 | if (exclusion_count == 0 && filter_expression == NULL && | |
5cdb6027 | 1038 | (handle->domain.type != LTTNG_DOMAIN_JUL && |
0e115563 DG |
1039 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1040 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
3e1c9ff7 | 1041 | goto ask_sessiond; |
93deb080 JI |
1042 | } |
1043 | ||
1044 | /* | |
1045 | * We have either a filter or some exclusions, so we need to set up | |
9ae110e2 | 1046 | * a variable-length memory block from where to send the data. |
93deb080 JI |
1047 | */ |
1048 | ||
9ae110e2 | 1049 | /* Parse filter expression. */ |
5cdb6027 | 1050 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1051 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1052 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1053 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1054 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1055 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1056 | char *agent_filter; | |
64226865 | 1057 | |
347c5ab5 | 1058 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1059 | agent_filter = set_agent_filter(filter_expression, ev); |
1060 | if (!agent_filter) { | |
137b9942 | 1061 | if (!filter_expression) { |
9ae110e2 JG |
1062 | /* |
1063 | * No JUL and no filter, just skip | |
1064 | * everything below. | |
1065 | */ | |
137b9942 DG |
1066 | goto ask_sessiond; |
1067 | } | |
64226865 DG |
1068 | } else { |
1069 | /* | |
9ae110e2 JG |
1070 | * With an agent filter, the original filter has |
1071 | * been added to it thus replace the filter | |
1072 | * expression. | |
64226865 | 1073 | */ |
0e115563 | 1074 | filter_expression = agent_filter; |
e9efbcd3 | 1075 | free_filter_expression = 1; |
9b21e6d5 | 1076 | } |
9b21e6d5 | 1077 | } |
93deb080 | 1078 | |
137b9942 | 1079 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1080 | if (ret) { |
137b9942 | 1081 | goto filter_error; |
93deb080 | 1082 | } |
6b453b5e JG |
1083 | } |
1084 | ||
1085 | varlen_data = zmalloc(lsm.u.enable.bytecode_len | |
137b9942 DG |
1086 | + lsm.u.enable.expression_len |
1087 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
6b453b5e JG |
1088 | if (!varlen_data) { |
1089 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
7ca1dc6f | 1090 | goto mem_error; |
6b453b5e | 1091 | } |
137b9942 | 1092 | |
9ae110e2 | 1093 | /* Put exclusion names first in the data. */ |
6b453b5e JG |
1094 | while (exclusion_count--) { |
1095 | strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count, | |
0c82ac62 PP |
1096 | *(exclusion_list + exclusion_count), |
1097 | LTTNG_SYMBOL_NAME_LEN - 1); | |
6b453b5e | 1098 | } |
9ae110e2 | 1099 | /* Add filter expression next. */ |
6b453b5e JG |
1100 | if (lsm.u.enable.expression_len != 0) { |
1101 | memcpy(varlen_data | |
1102 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count, | |
1103 | filter_expression, | |
1104 | lsm.u.enable.expression_len); | |
1105 | } | |
9ae110e2 | 1106 | /* Add filter bytecode next. */ |
137b9942 | 1107 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
6b453b5e JG |
1108 | memcpy(varlen_data |
1109 | + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count | |
1110 | + lsm.u.enable.expression_len, | |
1111 | &ctx->bytecode->b, | |
1112 | lsm.u.enable.bytecode_len); | |
93deb080 JI |
1113 | } |
1114 | ||
795a978d | 1115 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
67676bd8 | 1116 | (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) + |
9ae110e2 JG |
1117 | lsm.u.enable.bytecode_len + lsm.u.enable.expression_len, |
1118 | NULL); | |
6b453b5e | 1119 | free(varlen_data); |
93deb080 | 1120 | |
7ca1dc6f DG |
1121 | mem_error: |
1122 | if (filter_expression && ctx) { | |
93deb080 JI |
1123 | filter_bytecode_free(ctx); |
1124 | filter_ir_free(ctx); | |
1125 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1126 | } |
1127 | filter_error: | |
1128 | if (free_filter_expression) { | |
1129 | /* | |
9ae110e2 JG |
1130 | * The filter expression has been replaced and must be freed as |
1131 | * it is not the original filter expression received as a | |
1132 | * parameter. | |
7ca1dc6f DG |
1133 | */ |
1134 | free(filter_expression); | |
93deb080 | 1135 | } |
137b9942 DG |
1136 | error: |
1137 | /* | |
9ae110e2 JG |
1138 | * Return directly to the caller and don't ask the sessiond since |
1139 | * something went wrong in the parsing of data above. | |
137b9942 | 1140 | */ |
93deb080 | 1141 | return ret; |
3e1c9ff7 DG |
1142 | |
1143 | ask_sessiond: | |
1144 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1145 | return ret; | |
93deb080 JI |
1146 | } |
1147 | ||
6e911cad MD |
1148 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1149 | struct lttng_event *ev, const char *channel_name, | |
1150 | const char *original_filter_expression) | |
1df4dedd | 1151 | { |
cd80958d | 1152 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1153 | char *varlen_data; |
1154 | int ret = 0; | |
1155 | unsigned int free_filter_expression = 0; | |
1156 | struct filter_parser_ctx *ctx = NULL; | |
1157 | /* | |
1158 | * Cast as non-const since we may replace the filter expression | |
1159 | * by a dynamically allocated string. Otherwise, the original | |
1160 | * string is not modified. | |
1161 | */ | |
1162 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1163 | |
6e911cad MD |
1164 | if (handle == NULL || ev == NULL) { |
1165 | ret = -LTTNG_ERR_INVALID; | |
1166 | goto error; | |
1167 | } | |
1168 | ||
9ae110e2 JG |
1169 | /* |
1170 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1171 | * anyway, so treat this corner-case early to eliminate |
1172 | * lttng_fmemopen error for 0-byte allocation. | |
1173 | */ | |
1174 | if (filter_expression && filter_expression[0] == '\0') { | |
1175 | ret = -LTTNG_ERR_INVALID; | |
1176 | goto error; | |
cd80958d DG |
1177 | } |
1178 | ||
441c16a7 MD |
1179 | memset(&lsm, 0, sizeof(lsm)); |
1180 | ||
85076754 MD |
1181 | /* If no channel name, send empty string. */ |
1182 | if (channel_name == NULL) { | |
1183 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1184 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1185 | } else { |
85076754 | 1186 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1187 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1188 | } |
1189 | ||
18a720cd | 1190 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1191 | |
6e911cad MD |
1192 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1193 | /* FIXME: copying non-packed struct to packed struct. */ | |
1194 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1195 | ||
cac3069d | 1196 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1197 | sizeof(lsm.session.name)); |
6e911cad | 1198 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1199 | |
6e911cad MD |
1200 | /* |
1201 | * For the JUL domain, a filter is enforced except for the | |
1202 | * disable all event. This is done to avoid having the event in | |
1203 | * all sessions thus filtering by logger name. | |
1204 | */ | |
1205 | if (filter_expression == NULL && | |
1206 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1207 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1208 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1209 | goto ask_sessiond; |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * We have a filter, so we need to set up a variable-length | |
1214 | * memory block from where to send the data. | |
1215 | */ | |
1216 | ||
1217 | /* Parse filter expression */ | |
1218 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1219 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1220 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1221 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1222 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1223 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1224 | char *agent_filter; | |
6e911cad MD |
1225 | |
1226 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1227 | agent_filter = set_agent_filter(filter_expression, ev); |
1228 | if (!agent_filter) { | |
6e911cad | 1229 | if (!filter_expression) { |
9ae110e2 JG |
1230 | /* |
1231 | * No JUL and no filter, just skip | |
1232 | * everything below. | |
1233 | */ | |
6e911cad MD |
1234 | goto ask_sessiond; |
1235 | } | |
1236 | } else { | |
1237 | /* | |
9ae110e2 JG |
1238 | * With a JUL filter, the original filter has |
1239 | * been added to it thus replace the filter | |
1240 | * expression. | |
6e911cad | 1241 | */ |
0e115563 | 1242 | filter_expression = agent_filter; |
6e911cad MD |
1243 | free_filter_expression = 1; |
1244 | } | |
1245 | } | |
1246 | ||
1247 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1248 | if (ret) { | |
1249 | goto filter_error; | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1254 | + lsm.u.disable.expression_len); | |
1255 | if (!varlen_data) { | |
1256 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1257 | goto mem_error; | |
1258 | } | |
1259 | ||
9ae110e2 | 1260 | /* Add filter expression. */ |
6e911cad MD |
1261 | if (lsm.u.disable.expression_len != 0) { |
1262 | memcpy(varlen_data, | |
1263 | filter_expression, | |
1264 | lsm.u.disable.expression_len); | |
1265 | } | |
9ae110e2 | 1266 | /* Add filter bytecode next. */ |
6e911cad MD |
1267 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1268 | memcpy(varlen_data | |
1269 | + lsm.u.disable.expression_len, | |
1270 | &ctx->bytecode->b, | |
1271 | lsm.u.disable.bytecode_len); | |
1272 | } | |
1273 | ||
795a978d | 1274 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1275 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1276 | free(varlen_data); | |
1277 | ||
1278 | mem_error: | |
1279 | if (filter_expression && ctx) { | |
1280 | filter_bytecode_free(ctx); | |
1281 | filter_ir_free(ctx); | |
1282 | filter_parser_ctx_free(ctx); | |
1283 | } | |
1284 | filter_error: | |
1285 | if (free_filter_expression) { | |
1286 | /* | |
9ae110e2 JG |
1287 | * The filter expression has been replaced and must be freed as |
1288 | * it is not the original filter expression received as a | |
1289 | * parameter. | |
6e911cad MD |
1290 | */ |
1291 | free(filter_expression); | |
1292 | } | |
1293 | error: | |
1294 | /* | |
9ae110e2 JG |
1295 | * Return directly to the caller and don't ask the sessiond since |
1296 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1297 | */ |
1298 | return ret; | |
1299 | ||
1300 | ask_sessiond: | |
1301 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1302 | return ret; | |
1303 | } | |
1304 | ||
1305 | /* | |
9ae110e2 JG |
1306 | * Disable event(s) of a channel and domain. |
1307 | * If no event name is specified, all events are disabled. | |
1308 | * If no channel name is specified, the default 'channel0' is used. | |
1309 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1310 | */ |
1311 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1312 | const char *channel_name) | |
1313 | { | |
1314 | struct lttng_event ev; | |
1315 | ||
1316 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1317 | ev.loglevel = -1; |
6e911cad MD |
1318 | ev.type = LTTNG_EVENT_ALL; |
1319 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1320 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1321 | } |
1322 | ||
1323 | /* | |
9ae110e2 JG |
1324 | * Enable channel per domain |
1325 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1326 | */ |
cd80958d | 1327 | int lttng_enable_channel(struct lttng_handle *handle, |
38057ed1 | 1328 | struct lttng_channel *chan) |
a5c5a2bd | 1329 | { |
cd80958d DG |
1330 | struct lttcomm_session_msg lsm; |
1331 | ||
9ae110e2 | 1332 | /* NULL arguments are forbidden. No default values. */ |
5117eeec | 1333 | if (handle == NULL || chan == NULL) { |
2f70b271 | 1334 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1335 | } |
1336 | ||
441c16a7 MD |
1337 | memset(&lsm, 0, sizeof(lsm)); |
1338 | ||
5117eeec | 1339 | memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan)); |
7d29a247 | 1340 | |
cd80958d DG |
1341 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
1342 | ||
cac3069d | 1343 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1344 | |
cac3069d | 1345 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1346 | sizeof(lsm.session.name)); |
1347 | ||
cac3069d | 1348 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1349 | } |
1df4dedd | 1350 | |
2ef84c95 | 1351 | /* |
9ae110e2 JG |
1352 | * All tracing will be stopped for registered events of the channel. |
1353 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1354 | */ |
cd80958d | 1355 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1356 | { |
cd80958d DG |
1357 | struct lttcomm_session_msg lsm; |
1358 | ||
9ae110e2 | 1359 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1360 | if (handle == NULL || name == NULL) { |
2f70b271 | 1361 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1362 | } |
1363 | ||
441c16a7 MD |
1364 | memset(&lsm, 0, sizeof(lsm)); |
1365 | ||
cd80958d | 1366 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1367 | |
cac3069d | 1368 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1369 | sizeof(lsm.u.disable.channel_name)); |
1370 | ||
cac3069d | 1371 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1372 | |
cac3069d | 1373 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1374 | sizeof(lsm.session.name)); |
1375 | ||
cac3069d | 1376 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1377 | } |
1378 | ||
ccf10263 | 1379 | /* |
9ae110e2 JG |
1380 | * Add PID to session tracker. |
1381 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1382 | */ |
1383 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1384 | { | |
1385 | struct lttcomm_session_msg lsm; | |
1386 | ||
9ae110e2 | 1387 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1388 | if (handle == NULL) { |
1389 | return -LTTNG_ERR_INVALID; | |
1390 | } | |
1391 | ||
1392 | memset(&lsm, 0, sizeof(lsm)); | |
1393 | ||
1394 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1395 | lsm.u.pid_tracker.pid = pid; | |
1396 | ||
1397 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1398 | ||
1399 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1400 | sizeof(lsm.session.name)); | |
1401 | ||
1402 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1403 | } | |
1404 | ||
1405 | /* | |
9ae110e2 JG |
1406 | * Remove PID from session tracker. |
1407 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1408 | */ |
1409 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1410 | { | |
1411 | struct lttcomm_session_msg lsm; | |
1412 | ||
9ae110e2 | 1413 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1414 | if (handle == NULL) { |
1415 | return -LTTNG_ERR_INVALID; | |
1416 | } | |
1417 | ||
1418 | memset(&lsm, 0, sizeof(lsm)); | |
1419 | ||
1420 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1421 | lsm.u.pid_tracker.pid = pid; | |
1422 | ||
1423 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1424 | ||
1425 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1426 | sizeof(lsm.session.name)); | |
1427 | ||
1428 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1429 | } | |
1430 | ||
fac6795d | 1431 | /* |
9ae110e2 JG |
1432 | * Lists all available tracepoints of domain. |
1433 | * Sets the contents of the events array. | |
1434 | * Returns the number of lttng_event entries in events; | |
1435 | * on error, returns a negative value. | |
fac6795d | 1436 | */ |
cd80958d | 1437 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1438 | struct lttng_event **events) |
fac6795d | 1439 | { |
052da939 | 1440 | int ret; |
cd80958d DG |
1441 | struct lttcomm_session_msg lsm; |
1442 | ||
9d697d3d | 1443 | if (handle == NULL) { |
2f70b271 | 1444 | return -LTTNG_ERR_INVALID; |
cd80958d | 1445 | } |
fac6795d | 1446 | |
53efb85a | 1447 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1448 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1449 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1450 | |
cac3069d | 1451 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1452 | if (ret < 0) { |
1453 | return ret; | |
eb354453 | 1454 | } |
fac6795d | 1455 | |
9f19cc17 | 1456 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1457 | } |
1458 | ||
f37d259d | 1459 | /* |
9ae110e2 JG |
1460 | * Lists all available tracepoint fields of domain. |
1461 | * Sets the contents of the event field array. | |
1462 | * Returns the number of lttng_event_field entries in events; | |
1463 | * on error, returns a negative value. | |
f37d259d MD |
1464 | */ |
1465 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1466 | struct lttng_event_field **fields) | |
1467 | { | |
1468 | int ret; | |
1469 | struct lttcomm_session_msg lsm; | |
1470 | ||
1471 | if (handle == NULL) { | |
2f70b271 | 1472 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1473 | } |
1474 | ||
53efb85a | 1475 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1476 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1477 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1478 | |
cac3069d | 1479 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1480 | if (ret < 0) { |
1481 | return ret; | |
1482 | } | |
1483 | ||
1484 | return ret / sizeof(struct lttng_event_field); | |
1485 | } | |
1486 | ||
834978fd | 1487 | /* |
9ae110e2 JG |
1488 | * Lists all available kernel system calls. Allocates and sets the contents of |
1489 | * the events array. | |
834978fd | 1490 | * |
9ae110e2 JG |
1491 | * Returns the number of lttng_event entries in events; on error, returns a |
1492 | * negative value. | |
834978fd DG |
1493 | */ |
1494 | int lttng_list_syscalls(struct lttng_event **events) | |
1495 | { | |
1496 | int ret; | |
1497 | struct lttcomm_session_msg lsm; | |
1498 | ||
1499 | if (!events) { | |
1500 | return -LTTNG_ERR_INVALID; | |
1501 | } | |
1502 | ||
1503 | memset(&lsm, 0, sizeof(lsm)); | |
1504 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1505 | /* Force kernel domain for system calls. */ | |
1506 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1507 | ||
1508 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1509 | if (ret < 0) { | |
1510 | return ret; | |
1511 | } | |
1512 | ||
1513 | return ret / sizeof(struct lttng_event); | |
1514 | } | |
1515 | ||
1657e9bb | 1516 | /* |
9ae110e2 JG |
1517 | * Returns a human readable string describing |
1518 | * the error code (a negative value). | |
1657e9bb | 1519 | */ |
9a745bc7 | 1520 | const char *lttng_strerror(int code) |
1657e9bb | 1521 | { |
f73fabfd | 1522 | return error_get_str(code); |
1657e9bb DG |
1523 | } |
1524 | ||
aaf97519 | 1525 | /* |
a4b92340 DG |
1526 | * Create a brand new session using name and url for destination. |
1527 | * | |
f73fabfd | 1528 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1529 | */ |
a4b92340 | 1530 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1531 | { |
3dd05a85 | 1532 | int ret; |
a4b92340 | 1533 | ssize_t size; |
00e2e675 | 1534 | struct lttcomm_session_msg lsm; |
a4b92340 | 1535 | struct lttng_uri *uris = NULL; |
00e2e675 | 1536 | |
a4b92340 | 1537 | if (name == NULL) { |
2f70b271 | 1538 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1539 | } |
1540 | ||
a4b92340 | 1541 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1542 | |
a4b92340 | 1543 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1544 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1545 | |
1546 | /* There should never be a data URL */ | |
bc894455 | 1547 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1548 | if (size < 0) { |
2f70b271 | 1549 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1550 | } |
1551 | ||
a4b92340 DG |
1552 | lsm.u.uri.size = size; |
1553 | ||
795a978d | 1554 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1555 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1556 | |
1557 | free(uris); | |
1558 | return ret; | |
00e2e675 DG |
1559 | } |
1560 | ||
8028d920 | 1561 | /* |
9ae110e2 JG |
1562 | * Destroy session using name. |
1563 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1564 | */ |
8fd2c92c | 1565 | static |
e20ee7c2 | 1566 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 1567 | { |
cd80958d DG |
1568 | struct lttcomm_session_msg lsm; |
1569 | ||
843f5df9 | 1570 | if (session_name == NULL) { |
2f70b271 | 1571 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1572 | } |
1573 | ||
53efb85a | 1574 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1575 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1576 | |
cac3069d DG |
1577 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1578 | sizeof(lsm.session.name)); | |
cd80958d | 1579 | |
cac3069d | 1580 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1581 | } |
1582 | ||
e20ee7c2 JD |
1583 | /* |
1584 | * Stop the session and wait for the data before destroying it | |
1585 | */ | |
1586 | int lttng_destroy_session(const char *session_name) | |
1587 | { | |
1588 | int ret; | |
1589 | ||
1590 | /* | |
1591 | * Stop the tracing and wait for the data. | |
1592 | */ | |
1593 | ret = _lttng_stop_tracing(session_name, 1); | |
1594 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1595 | goto end; | |
1596 | } | |
1597 | ||
1598 | ret = _lttng_destroy_session(session_name); | |
1599 | end: | |
1600 | return ret; | |
1601 | } | |
1602 | ||
1603 | /* | |
1604 | * Destroy the session without waiting for the data. | |
1605 | */ | |
1606 | int lttng_destroy_session_no_wait(const char *session_name) | |
1607 | { | |
1608 | int ret; | |
1609 | ||
1610 | /* | |
1611 | * Stop the tracing without waiting for the data. | |
1612 | * The session might already have been stopped, so just | |
1613 | * skip this error. | |
1614 | */ | |
1615 | ret = _lttng_stop_tracing(session_name, 0); | |
1616 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1617 | goto end; | |
1618 | } | |
1619 | ||
1620 | ret = _lttng_destroy_session(session_name); | |
1621 | end: | |
1622 | return ret; | |
1623 | } | |
1624 | ||
57167058 | 1625 | /* |
9ae110e2 JG |
1626 | * Ask the session daemon for all available sessions. |
1627 | * Sets the contents of the sessions array. | |
1628 | * Returns the number of lttng_session entries in sessions; | |
1629 | * on error, returns a negative value. | |
57167058 | 1630 | */ |
ca95a216 | 1631 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1632 | { |
ca95a216 | 1633 | int ret; |
cd80958d | 1634 | struct lttcomm_session_msg lsm; |
57167058 | 1635 | |
53efb85a | 1636 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1637 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1638 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1639 | if (ret < 0) { |
ca95a216 | 1640 | return ret; |
57167058 DG |
1641 | } |
1642 | ||
ca95a216 | 1643 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1644 | } |
1645 | ||
d7ba1388 MD |
1646 | int lttng_set_session_shm_path(const char *session_name, |
1647 | const char *shm_path) | |
1648 | { | |
1649 | struct lttcomm_session_msg lsm; | |
1650 | ||
1651 | if (session_name == NULL) { | |
1652 | return -LTTNG_ERR_INVALID; | |
1653 | } | |
1654 | ||
1655 | memset(&lsm, 0, sizeof(lsm)); | |
1656 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1657 | ||
1658 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1659 | sizeof(lsm.session.name)); | |
1660 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1661 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1662 | ||
1663 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1664 | } | |
1665 | ||
9f19cc17 | 1666 | /* |
9ae110e2 JG |
1667 | * Ask the session daemon for all available domains of a session. |
1668 | * Sets the contents of the domains array. | |
1669 | * Returns the number of lttng_domain entries in domains; | |
1670 | * on error, returns a negative value. | |
9f19cc17 | 1671 | */ |
330be774 | 1672 | int lttng_list_domains(const char *session_name, |
cd80958d | 1673 | struct lttng_domain **domains) |
9f19cc17 DG |
1674 | { |
1675 | int ret; | |
cd80958d DG |
1676 | struct lttcomm_session_msg lsm; |
1677 | ||
330be774 | 1678 | if (session_name == NULL) { |
2f70b271 | 1679 | return -LTTNG_ERR_INVALID; |
cd80958d | 1680 | } |
9f19cc17 | 1681 | |
53efb85a | 1682 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1683 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1684 | ||
cac3069d DG |
1685 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1686 | sizeof(lsm.session.name)); | |
cd80958d | 1687 | |
cac3069d | 1688 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1689 | if (ret < 0) { |
1690 | return ret; | |
1691 | } | |
1692 | ||
1693 | return ret / sizeof(struct lttng_domain); | |
1694 | } | |
1695 | ||
1696 | /* | |
9ae110e2 JG |
1697 | * Ask the session daemon for all available channels of a session. |
1698 | * Sets the contents of the channels array. | |
1699 | * Returns the number of lttng_channel entries in channels; | |
1700 | * on error, returns a negative value. | |
9f19cc17 | 1701 | */ |
cd80958d DG |
1702 | int lttng_list_channels(struct lttng_handle *handle, |
1703 | struct lttng_channel **channels) | |
9f19cc17 DG |
1704 | { |
1705 | int ret; | |
53e367f9 JG |
1706 | size_t channel_count, i; |
1707 | const size_t channel_size = sizeof(struct lttng_channel) + | |
1708 | sizeof(struct lttcomm_channel_extended); | |
cd80958d | 1709 | struct lttcomm_session_msg lsm; |
53e367f9 | 1710 | void *extended_at; |
cd80958d | 1711 | |
9d697d3d | 1712 | if (handle == NULL) { |
53e367f9 JG |
1713 | ret = -LTTNG_ERR_INVALID; |
1714 | goto end; | |
cd80958d DG |
1715 | } |
1716 | ||
53efb85a | 1717 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1718 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1719 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1720 | sizeof(lsm.session.name)); |
9f19cc17 | 1721 | |
cac3069d | 1722 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1723 | |
cac3069d | 1724 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 1725 | if (ret < 0) { |
53e367f9 JG |
1726 | goto end; |
1727 | } | |
1728 | ||
1729 | if (ret % channel_size) { | |
1730 | ret = -LTTNG_ERR_UNK; | |
1731 | free(*channels); | |
1732 | *channels = NULL; | |
1733 | goto end; | |
9f19cc17 | 1734 | } |
53e367f9 | 1735 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 1736 | |
53e367f9 JG |
1737 | /* Set extended info pointers */ |
1738 | extended_at = ((void *) *channels) + | |
1739 | channel_count * sizeof(struct lttng_channel); | |
1740 | for (i = 0; i < channel_count; i++) { | |
1741 | struct lttng_channel *chan = &(*channels)[i]; | |
1742 | ||
1743 | chan->attr.extended.ptr = extended_at; | |
1744 | extended_at += sizeof(struct lttcomm_channel_extended); | |
1745 | } | |
1746 | ||
1747 | ret = (int) channel_count; | |
1748 | end: | |
1749 | return ret; | |
9f19cc17 DG |
1750 | } |
1751 | ||
1752 | /* | |
9ae110e2 JG |
1753 | * Ask the session daemon for all available events of a session channel. |
1754 | * Sets the contents of the events array. | |
1755 | * Returns the number of lttng_event entries in events; | |
1756 | * on error, returns a negative value. | |
9f19cc17 | 1757 | */ |
cd80958d DG |
1758 | int lttng_list_events(struct lttng_handle *handle, |
1759 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1760 | { |
1761 | int ret; | |
cd80958d | 1762 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
1763 | struct lttcomm_event_command_header *cmd_header = NULL; |
1764 | size_t cmd_header_len; | |
1765 | uint32_t nb_events, i; | |
1766 | void *extended_at; | |
9f19cc17 | 1767 | |
9d697d3d DG |
1768 | /* Safety check. An handle and channel name are mandatory */ |
1769 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1770 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1771 | } |
1772 | ||
53efb85a | 1773 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1774 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1775 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1776 | sizeof(lsm.session.name)); |
cac3069d | 1777 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 1778 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 1779 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1780 | |
b4e3ceb9 PP |
1781 | ret = lttng_ctl_ask_sessiond_varlen(&lsm, NULL, 0, (void **) events, |
1782 | (void **) &cmd_header, &cmd_header_len); | |
9f19cc17 | 1783 | if (ret < 0) { |
b4e3ceb9 | 1784 | goto error; |
9f19cc17 DG |
1785 | } |
1786 | ||
b4e3ceb9 PP |
1787 | /* Set number of events and free command header */ |
1788 | nb_events = cmd_header->nb_events; | |
1789 | if (nb_events > INT_MAX) { | |
1790 | ret = -EOVERFLOW; | |
1791 | goto error; | |
1792 | } | |
1793 | ret = (int) nb_events; | |
1794 | free(cmd_header); | |
1795 | cmd_header = NULL; | |
1796 | ||
1797 | /* Set extended info pointers */ | |
1798 | extended_at = ((void*) (*events)) + | |
1799 | nb_events * sizeof(struct lttng_event); | |
1800 | ||
1801 | for (i = 0; i < nb_events; i++) { | |
1802 | struct lttcomm_event_extended_header *ext_header; | |
1803 | struct lttng_event *event = &(*events)[i]; | |
1804 | ||
1805 | event->extended.ptr = extended_at; | |
1806 | ext_header = | |
1807 | (struct lttcomm_event_extended_header *) extended_at; | |
1808 | extended_at += sizeof(*ext_header); | |
1809 | extended_at += ext_header->filter_len; | |
795d57ce PP |
1810 | extended_at += |
1811 | ext_header->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
b4e3ceb9 PP |
1812 | } |
1813 | ||
1814 | return ret; | |
1815 | error: | |
1816 | free(cmd_header); | |
1817 | free(*events); | |
1818 | return ret; | |
9f19cc17 DG |
1819 | } |
1820 | ||
134e72ed JG |
1821 | int lttng_event_get_filter_expression(struct lttng_event *event, |
1822 | const char **filter_expression) | |
d31d3e8c PP |
1823 | { |
1824 | int ret = 0; | |
1825 | struct lttcomm_event_extended_header *ext_header; | |
1826 | ||
134e72ed | 1827 | if (!event || !filter_expression) { |
d31d3e8c PP |
1828 | ret = -LTTNG_ERR_INVALID; |
1829 | goto end; | |
1830 | } | |
1831 | ||
1832 | ext_header = event->extended.ptr; | |
1833 | ||
1834 | if (!ext_header) { | |
1835 | /* | |
1836 | * This can happen since the lttng_event structure is | |
1837 | * used for other tasks where this pointer is never set. | |
1838 | */ | |
134e72ed | 1839 | *filter_expression = NULL; |
d31d3e8c PP |
1840 | goto end; |
1841 | } | |
1842 | ||
1843 | if (ext_header->filter_len) { | |
134e72ed JG |
1844 | *filter_expression = ((const char *) (ext_header)) + |
1845 | sizeof(*ext_header); | |
d31d3e8c | 1846 | } else { |
134e72ed | 1847 | *filter_expression = NULL; |
d31d3e8c PP |
1848 | } |
1849 | ||
1850 | end: | |
1851 | return ret; | |
1852 | } | |
b4e3ceb9 | 1853 | |
f086e50e PP |
1854 | int lttng_event_get_exclusion_name_count(struct lttng_event *event) |
1855 | { | |
1856 | int ret; | |
1857 | struct lttcomm_event_extended_header *ext_header; | |
1858 | ||
1859 | if (!event) { | |
1860 | ret = -LTTNG_ERR_INVALID; | |
1861 | goto end; | |
1862 | } | |
1863 | ||
1864 | ext_header = event->extended.ptr; | |
1865 | if (!ext_header) { | |
1866 | /* | |
1867 | * This can happen since the lttng_event structure is | |
1868 | * used for other tasks where this pointer is never set. | |
1869 | */ | |
1870 | ret = 0; | |
1871 | goto end; | |
1872 | } | |
1873 | ||
1874 | if (ext_header->nb_exclusions > INT_MAX) { | |
1875 | ret = -LTTNG_ERR_OVERFLOW; | |
1876 | goto end; | |
1877 | } | |
1878 | ret = (int) ext_header->nb_exclusions; | |
1879 | end: | |
1880 | return ret; | |
1881 | } | |
1882 | ||
1883 | int lttng_event_get_exclusion_name(struct lttng_event *event, | |
1884 | size_t index, const char **exclusion_name) | |
1885 | { | |
1886 | int ret = 0; | |
1887 | struct lttcomm_event_extended_header *ext_header; | |
1888 | void *at; | |
1889 | ||
1890 | if (!event || !exclusion_name) { | |
1891 | ret = -LTTNG_ERR_INVALID; | |
1892 | goto end; | |
1893 | } | |
1894 | ||
1895 | ext_header = event->extended.ptr; | |
1896 | if (!ext_header) { | |
1897 | ret = -LTTNG_ERR_INVALID; | |
1898 | goto end; | |
1899 | } | |
1900 | ||
1901 | if (index >= ext_header->nb_exclusions) { | |
1902 | ret = -LTTNG_ERR_INVALID; | |
1903 | goto end; | |
1904 | } | |
1905 | ||
1906 | at = (void *) ext_header + sizeof(*ext_header); | |
1907 | at += ext_header->filter_len; | |
1908 | at += index * LTTNG_SYMBOL_NAME_LEN; | |
1909 | *exclusion_name = at; | |
1910 | ||
1911 | end: | |
1912 | return ret; | |
1913 | } | |
1914 | ||
fac6795d | 1915 | /* |
1c8d13c8 TD |
1916 | * Sets the tracing_group variable with name. |
1917 | * This function allocates memory pointed to by tracing_group. | |
1918 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
1919 | */ |
1920 | int lttng_set_tracing_group(const char *name) | |
1921 | { | |
9d697d3d | 1922 | if (name == NULL) { |
2f70b271 | 1923 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
1924 | } |
1925 | ||
fac6795d | 1926 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 1927 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
1928 | } |
1929 | ||
1930 | return 0; | |
1931 | } | |
1932 | ||
cd80958d | 1933 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
1934 | struct lttng_calibrate *calibrate) |
1935 | { | |
b812e5ca PP |
1936 | /* |
1937 | * This command was removed in LTTng 2.9. | |
1938 | */ | |
1939 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
1940 | } |
1941 | ||
5edd7e09 DG |
1942 | /* |
1943 | * Set default channel attributes. | |
441c16a7 | 1944 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
1945 | */ |
1946 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
1947 | struct lttng_channel_attr *attr) | |
1948 | { | |
1949 | /* Safety check */ | |
1950 | if (attr == NULL || domain == NULL) { | |
1951 | return; | |
1952 | } | |
1953 | ||
eacaa7a6 DS |
1954 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
1955 | ||
0a9c6494 DG |
1956 | /* Same for all domains. */ |
1957 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
1958 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
1959 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
1960 | ||
5edd7e09 DG |
1961 | switch (domain->type) { |
1962 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
1963 | attr->switch_timer_interval = |
1964 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 1965 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 1966 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
1967 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
1968 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
1969 | break; | |
1970 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
1971 | switch (domain->buf_type) { |
1972 | case LTTNG_BUFFER_PER_UID: | |
1973 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
1974 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
1975 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
1976 | attr->switch_timer_interval = |
1977 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
1978 | attr->read_timer_interval = | |
1979 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
1980 | break; |
1981 | case LTTNG_BUFFER_PER_PID: | |
1982 | default: | |
1983 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
1984 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
1985 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
1986 | attr->switch_timer_interval = |
1987 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
1988 | attr->read_timer_interval = | |
1989 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
1990 | break; |
1991 | } | |
5edd7e09 | 1992 | default: |
441c16a7 | 1993 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
1994 | break; |
1995 | } | |
1996 | } | |
1997 | ||
5ba3702f JG |
1998 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
1999 | uint64_t *discarded_events) | |
2000 | { | |
2001 | int ret = 0; | |
2002 | struct lttcomm_channel_extended *chan_ext; | |
2003 | ||
2004 | if (!channel || !discarded_events) { | |
2005 | ret = -LTTNG_ERR_INVALID; | |
2006 | goto end; | |
2007 | } | |
2008 | ||
2009 | chan_ext = channel->attr.extended.ptr; | |
2010 | if (!chan_ext) { | |
2011 | /* | |
2012 | * This can happen since the lttng_channel structure is | |
2013 | * used for other tasks where this pointer is never set. | |
2014 | */ | |
2015 | *discarded_events = 0; | |
2016 | goto end; | |
2017 | } | |
2018 | ||
2019 | *discarded_events = chan_ext->discarded_events; | |
2020 | end: | |
2021 | return ret; | |
2022 | } | |
2023 | ||
2024 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2025 | uint64_t *lost_packets) | |
2026 | { | |
2027 | int ret = 0; | |
2028 | struct lttcomm_channel_extended *chan_ext; | |
2029 | ||
2030 | if (!channel || !lost_packets) { | |
2031 | ret = -LTTNG_ERR_INVALID; | |
2032 | goto end; | |
2033 | } | |
2034 | ||
2035 | chan_ext = channel->attr.extended.ptr; | |
2036 | if (!chan_ext) { | |
2037 | /* | |
2038 | * This can happen since the lttng_channel structure is | |
2039 | * used for other tasks where this pointer is never set. | |
2040 | */ | |
2041 | *lost_packets = 0; | |
2042 | goto end; | |
2043 | } | |
2044 | ||
2045 | *lost_packets = chan_ext->lost_packets; | |
2046 | end: | |
2047 | return ret; | |
2048 | } | |
2049 | ||
fac6795d | 2050 | /* |
2269e89e | 2051 | * Check if session daemon is alive. |
fac6795d | 2052 | * |
2269e89e | 2053 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2054 | * On error returns a negative value. |
fac6795d | 2055 | */ |
947308c4 | 2056 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2057 | { |
2058 | int ret; | |
2059 | ||
2060 | ret = set_session_daemon_path(); | |
2061 | if (ret < 0) { | |
9ae110e2 | 2062 | /* Error. */ |
fac6795d DG |
2063 | return ret; |
2064 | } | |
2065 | ||
9d035200 | 2066 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2067 | /* |
9ae110e2 JG |
2068 | * No socket path set. Weird error which means the constructor |
2069 | * was not called. | |
2f70b271 DG |
2070 | */ |
2071 | assert(0); | |
fac6795d DG |
2072 | } |
2073 | ||
2269e89e | 2074 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2075 | if (ret < 0) { |
9ae110e2 | 2076 | /* Not alive. */ |
7d8234d9 MD |
2077 | return 0; |
2078 | } | |
7d8234d9 | 2079 | |
9ae110e2 | 2080 | /* Is alive. */ |
947308c4 | 2081 | return 1; |
fac6795d DG |
2082 | } |
2083 | ||
00e2e675 | 2084 | /* |
a4b92340 | 2085 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2086 | * |
2087 | * Return 0 on success, else a negative value. | |
2088 | */ | |
a4b92340 DG |
2089 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2090 | const char *control_url, const char *data_url) | |
00e2e675 | 2091 | { |
3dd05a85 | 2092 | int ret; |
a4b92340 | 2093 | ssize_t size; |
00e2e675 | 2094 | struct lttcomm_session_msg lsm; |
a4b92340 | 2095 | struct lttng_uri *uris = NULL; |
00e2e675 | 2096 | |
a4b92340 | 2097 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2098 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2099 | } |
2100 | ||
a4b92340 DG |
2101 | memset(&lsm, 0, sizeof(lsm)); |
2102 | ||
00e2e675 DG |
2103 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2104 | ||
cac3069d | 2105 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2106 | sizeof(lsm.session.name)); |
cac3069d | 2107 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2108 | |
bc894455 | 2109 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2110 | if (size < 0) { |
2f70b271 | 2111 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2112 | } |
2113 | ||
2114 | lsm.u.uri.size = size; | |
00e2e675 | 2115 | |
795a978d | 2116 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2117 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2118 | |
2119 | free(uris); | |
2120 | return ret; | |
00e2e675 DG |
2121 | } |
2122 | ||
2123 | /* | |
9c6bda17 | 2124 | * [OBSOLETE] |
00e2e675 DG |
2125 | */ |
2126 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2127 | { | |
785d2d0d | 2128 | return -ENOSYS; |
00e2e675 DG |
2129 | } |
2130 | ||
2131 | /* | |
9c6bda17 | 2132 | * [OBSOLETE] |
00e2e675 DG |
2133 | */ |
2134 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2135 | { | |
785d2d0d | 2136 | return -ENOSYS; |
00e2e675 DG |
2137 | } |
2138 | ||
07424f16 DG |
2139 | /* |
2140 | * This is an extension of create session that is ONLY and SHOULD only be used | |
2141 | * by the lttng command line program. It exists to avoid using URI parsing in | |
2142 | * the lttng client. | |
2143 | * | |
2144 | * We need the date and time for the trace path subdirectory for the case where | |
2145 | * the user does NOT define one using either -o or -U. Using the normal | |
2146 | * lttng_create_session API call, we have no clue on the session daemon side if | |
2147 | * the URL was generated automatically by the client or define by the user. | |
2148 | * | |
2149 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
2150 | * string and appends it if necessary to the URI subdirectory before sending it | |
2151 | * to the session daemon. | |
2152 | * | |
2153 | * With this extra function, the lttng_create_session call behavior is not | |
2154 | * changed and the timestamp is appended to the URI on the session daemon side | |
2155 | * if necessary. | |
2156 | */ | |
2157 | int _lttng_create_session_ext(const char *name, const char *url, | |
2158 | const char *datetime) | |
2159 | { | |
3dd05a85 | 2160 | int ret; |
07424f16 DG |
2161 | ssize_t size; |
2162 | struct lttcomm_session_msg lsm; | |
2163 | struct lttng_uri *uris = NULL; | |
2164 | ||
2bba9e53 | 2165 | if (name == NULL || datetime == NULL) { |
2f70b271 | 2166 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
2167 | } |
2168 | ||
2169 | memset(&lsm, 0, sizeof(lsm)); | |
2170 | ||
2171 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 2172 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 | 2173 | |
9ae110e2 | 2174 | /* There should never be a data URL. */ |
bc894455 | 2175 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 2176 | if (size < 0) { |
3dd05a85 DG |
2177 | ret = -LTTNG_ERR_INVALID; |
2178 | goto error; | |
07424f16 DG |
2179 | } |
2180 | ||
2181 | lsm.u.uri.size = size; | |
2182 | ||
4b35a6b3 | 2183 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
2184 | /* Don't append datetime if the name was automatically created. */ |
2185 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
2186 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
2187 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
2188 | name, datetime); | |
2189 | } else { | |
2190 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2191 | } | |
07424f16 DG |
2192 | if (ret < 0) { |
2193 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
2194 | ret = -LTTNG_ERR_FATAL; |
2195 | goto error; | |
07424f16 DG |
2196 | } |
2197 | } | |
2198 | ||
795a978d | 2199 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2200 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2201 | |
2202 | error: | |
2203 | free(uris); | |
2204 | return ret; | |
07424f16 DG |
2205 | } |
2206 | ||
806e2684 DG |
2207 | /* |
2208 | * For a given session name, this call checks if the data is ready to be read | |
2209 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2210 | * any readers. | |
2211 | */ | |
6d805429 | 2212 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2213 | { |
2214 | int ret; | |
2215 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2216 | uint8_t *pending = NULL; |
806e2684 DG |
2217 | |
2218 | if (session_name == NULL) { | |
2219 | return -LTTNG_ERR_INVALID; | |
2220 | } | |
2221 | ||
53efb85a | 2222 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2223 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2224 | |
cac3069d DG |
2225 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2226 | sizeof(lsm.session.name)); | |
806e2684 | 2227 | |
f6151c55 JG |
2228 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2229 | if (ret < 0) { | |
2230 | goto end; | |
2231 | } else if (ret != 1) { | |
2232 | /* Unexpected payload size */ | |
2233 | ret = -LTTNG_ERR_INVALID; | |
2234 | goto end; | |
806e2684 DG |
2235 | } |
2236 | ||
f6151c55 JG |
2237 | ret = (int) *pending; |
2238 | end: | |
2239 | free(pending); | |
806e2684 DG |
2240 | return ret; |
2241 | } | |
2242 | ||
27babd3a DG |
2243 | /* |
2244 | * Create a session exclusively used for snapshot. | |
2245 | * | |
2246 | * Returns LTTNG_OK on success or a negative error code. | |
2247 | */ | |
2248 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2249 | { | |
2250 | int ret; | |
2251 | ssize_t size; | |
2252 | struct lttcomm_session_msg lsm; | |
2253 | struct lttng_uri *uris = NULL; | |
2254 | ||
2255 | if (name == NULL) { | |
2256 | return -LTTNG_ERR_INVALID; | |
2257 | } | |
2258 | ||
2259 | memset(&lsm, 0, sizeof(lsm)); | |
2260 | ||
2261 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
2262 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2263 | ||
2264 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2265 | if (size < 0) { | |
2266 | return -LTTNG_ERR_INVALID; | |
2267 | } | |
2268 | ||
2269 | lsm.u.uri.size = size; | |
2270 | ||
795a978d | 2271 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
27babd3a DG |
2272 | sizeof(struct lttng_uri) * size, NULL); |
2273 | ||
2274 | free(uris); | |
2275 | return ret; | |
2276 | } | |
2277 | ||
ecc48a90 JD |
2278 | /* |
2279 | * Create a session exclusively used for live. | |
2280 | * | |
2281 | * Returns LTTNG_OK on success or a negative error code. | |
2282 | */ | |
2283 | int lttng_create_session_live(const char *name, const char *url, | |
2284 | unsigned int timer_interval) | |
2285 | { | |
2286 | int ret; | |
2287 | ssize_t size; | |
2288 | struct lttcomm_session_msg lsm; | |
2289 | struct lttng_uri *uris = NULL; | |
2290 | ||
92805ee4 | 2291 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
2292 | return -LTTNG_ERR_INVALID; |
2293 | } | |
2294 | ||
2295 | memset(&lsm, 0, sizeof(lsm)); | |
2296 | ||
2297 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
2298 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2299 | ||
1a241656 DG |
2300 | if (url) { |
2301 | size = uri_parse_str_urls(url, NULL, &uris); | |
2302 | if (size <= 0) { | |
2303 | ret = -LTTNG_ERR_INVALID; | |
2304 | goto end; | |
2305 | } | |
ecc48a90 | 2306 | |
1a241656 DG |
2307 | /* file:// is not accepted for live session. */ |
2308 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
2309 | ret = -LTTNG_ERR_INVALID; | |
2310 | goto end; | |
2311 | } | |
2312 | } else { | |
2313 | size = 0; | |
ecc48a90 JD |
2314 | } |
2315 | ||
2316 | lsm.u.session_live.nb_uri = size; | |
2317 | lsm.u.session_live.timer_interval = timer_interval; | |
2318 | ||
795a978d | 2319 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
ecc48a90 JD |
2320 | sizeof(struct lttng_uri) * size, NULL); |
2321 | ||
2322 | end: | |
2323 | free(uris); | |
2324 | return ret; | |
2325 | } | |
2326 | ||
a5dfbb9d MD |
2327 | /* |
2328 | * List PIDs in the tracker. | |
2329 | * | |
1b18ce93 JG |
2330 | * enabled is set to whether the PID tracker is enabled. |
2331 | * pids is set to an allocated array of PIDs currently tracked. On | |
2332 | * success, pids must be freed by the caller. | |
2333 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2334 | * |
2335 | * Returns 0 on success, else a negative LTTng error code. | |
2336 | */ | |
2337 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2338 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2339 | { | |
ebbf5ab7 JR |
2340 | int ret; |
2341 | int enabled = 1; | |
a5dfbb9d MD |
2342 | struct lttcomm_session_msg lsm; |
2343 | size_t nr_pids; | |
2344 | int32_t *pids; | |
2345 | ||
2346 | if (handle == NULL) { | |
2347 | return -LTTNG_ERR_INVALID; | |
2348 | } | |
2349 | ||
2350 | memset(&lsm, 0, sizeof(lsm)); | |
2351 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2352 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2353 | sizeof(lsm.session.name)); | |
2354 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2355 | ||
2356 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2357 | if (ret < 0) { | |
2358 | return ret; | |
2359 | } | |
2360 | nr_pids = ret / sizeof(int32_t); | |
2361 | if (nr_pids == 1 && pids[0] == -1) { | |
2362 | free(pids); | |
2363 | pids = NULL; | |
2364 | enabled = 0; | |
2365 | nr_pids = 0; | |
2366 | } | |
2367 | *_enabled = enabled; | |
2368 | *_pids = pids; | |
2369 | *_nr_pids = nr_pids; | |
2370 | return 0; | |
2371 | } | |
2372 | ||
93ec662e JD |
2373 | /* |
2374 | * Regenerate the metadata for a session. | |
2375 | * Return 0 on success, a negative error code on error. | |
2376 | */ | |
eded6438 | 2377 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2378 | { |
2379 | int ret; | |
2380 | struct lttcomm_session_msg lsm; | |
2381 | ||
2382 | if (!session_name) { | |
2383 | ret = -LTTNG_ERR_INVALID; | |
2384 | goto end; | |
2385 | } | |
2386 | ||
2387 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2388 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2389 | |
2390 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2391 | sizeof(lsm.session.name)); | |
2392 | ||
2393 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2394 | if (ret < 0) { | |
2395 | goto end; | |
2396 | } | |
2397 | ||
2398 | ret = 0; | |
2399 | end: | |
2400 | return ret; | |
2401 | } | |
2402 | ||
eded6438 JD |
2403 | /* |
2404 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2405 | */ | |
2406 | int lttng_metadata_regenerate(const char *session_name) | |
2407 | { | |
2408 | return lttng_regenerate_metadata(session_name); | |
2409 | } | |
2410 | ||
c2561365 JD |
2411 | /* |
2412 | * Regenerate the statedump of a session. | |
2413 | * Return 0 on success, a negative error code on error. | |
2414 | */ | |
2415 | int lttng_regenerate_statedump(const char *session_name) | |
2416 | { | |
2417 | int ret; | |
2418 | struct lttcomm_session_msg lsm; | |
2419 | ||
2420 | if (!session_name) { | |
2421 | ret = -LTTNG_ERR_INVALID; | |
2422 | goto end; | |
2423 | } | |
2424 | ||
2425 | memset(&lsm, 0, sizeof(lsm)); | |
2426 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2427 | ||
2428 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2429 | sizeof(lsm.session.name)); | |
2430 | ||
2431 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2432 | if (ret < 0) { | |
2433 | goto end; | |
2434 | } | |
2435 | ||
2436 | ret = 0; | |
2437 | end: | |
2438 | return ret; | |
2439 | } | |
2440 | ||
a58c490f JG |
2441 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2442 | { | |
2443 | int ret; | |
2444 | struct lttcomm_session_msg lsm; | |
2445 | char *trigger_buf = NULL; | |
2446 | ssize_t trigger_size; | |
2447 | ||
2448 | if (!trigger) { | |
2449 | ret = -LTTNG_ERR_INVALID; | |
2450 | goto end; | |
2451 | } | |
2452 | ||
2453 | if (!lttng_trigger_validate(trigger)) { | |
2454 | ret = -LTTNG_ERR_INVALID; | |
2455 | goto end; | |
2456 | } | |
2457 | ||
2458 | trigger_size = lttng_trigger_serialize(trigger, NULL); | |
2459 | if (trigger_size < 0) { | |
2460 | ret = -LTTNG_ERR_UNK; | |
2461 | goto end; | |
2462 | } | |
2463 | ||
2464 | trigger_buf = zmalloc(trigger_size); | |
2465 | if (!trigger_buf) { | |
2466 | ret = -LTTNG_ERR_NOMEM; | |
2467 | goto end; | |
2468 | } | |
2469 | ||
2470 | memset(&lsm, 0, sizeof(lsm)); | |
2471 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
2472 | if (lttng_trigger_serialize(trigger, trigger_buf) < 0) { | |
2473 | ret = -LTTNG_ERR_UNK; | |
2474 | goto end; | |
2475 | } | |
2476 | ||
2477 | lsm.u.trigger.length = (uint32_t) trigger_size; | |
2478 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, trigger_buf, | |
2479 | trigger_size, NULL); | |
2480 | end: | |
2481 | free(trigger_buf); | |
2482 | return ret; | |
2483 | } | |
2484 | ||
2485 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
2486 | { | |
2487 | int ret; | |
2488 | struct lttcomm_session_msg lsm; | |
2489 | char *trigger_buf = NULL; | |
2490 | ssize_t trigger_size; | |
2491 | ||
2492 | if (!trigger) { | |
2493 | ret = -LTTNG_ERR_INVALID; | |
2494 | goto end; | |
2495 | } | |
2496 | ||
2497 | if (!lttng_trigger_validate(trigger)) { | |
2498 | ret = -LTTNG_ERR_INVALID; | |
2499 | goto end; | |
2500 | } | |
2501 | ||
2502 | trigger_size = lttng_trigger_serialize(trigger, NULL); | |
2503 | if (trigger_size < 0) { | |
2504 | ret = -LTTNG_ERR_UNK; | |
2505 | goto end; | |
2506 | } | |
2507 | ||
2508 | trigger_buf = zmalloc(trigger_size); | |
2509 | if (!trigger_buf) { | |
2510 | ret = -LTTNG_ERR_NOMEM; | |
2511 | goto end; | |
2512 | } | |
2513 | ||
2514 | memset(&lsm, 0, sizeof(lsm)); | |
2515 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
2516 | if (lttng_trigger_serialize(trigger, trigger_buf) < 0) { | |
2517 | ret = -LTTNG_ERR_UNK; | |
2518 | goto end; | |
2519 | } | |
2520 | ||
2521 | lsm.u.trigger.length = (uint32_t) trigger_size; | |
2522 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, trigger_buf, | |
2523 | trigger_size, NULL); | |
2524 | end: | |
2525 | free(trigger_buf); | |
2526 | return ret; | |
2527 | } | |
2528 | ||
fac6795d | 2529 | /* |
9ae110e2 | 2530 | * lib constructor. |
fac6795d | 2531 | */ |
b2b89e8a | 2532 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
2533 | { |
2534 | /* Set default session group */ | |
bbccc3d2 | 2535 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2536 | } |
49cca668 DG |
2537 | |
2538 | /* | |
9ae110e2 | 2539 | * lib destructor. |
49cca668 | 2540 | */ |
b2b89e8a | 2541 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
2542 | { |
2543 | free(tracing_group); | |
2544 | } |