Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
2001793c | 7 | * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
d14d33bf AM |
9 | * This library is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
11 | * as published by the Free Software Foundation. | |
82a3637f DG |
12 | * |
13 | * This library is distributed in the hope that it will be useful, | |
fac6795d | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
82a3637f DG |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. | |
17 | * | |
d14d33bf AM |
18 | * You should have received a copy of the GNU Lesser General Public License |
19 | * along with this library; if not, write to the Free Software Foundation, | |
20 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
fac6795d DG |
21 | */ |
22 | ||
6c1c0768 | 23 | #define _LGPL_SOURCE |
44a5e5eb | 24 | #include <assert.h> |
fac6795d | 25 | #include <grp.h> |
1e307fab | 26 | #include <errno.h> |
fac6795d DG |
27 | #include <stdio.h> |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #include <unistd.h> | |
31 | ||
990570ed | 32 | #include <common/common.h> |
15e37663 | 33 | #include <common/compat/string.h> |
990570ed | 34 | #include <common/defaults.h> |
db758600 | 35 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 36 | #include <common/uri.h> |
feb0f3e5 | 37 | #include <common/utils.h> |
de453daa | 38 | #include <common/dynamic-buffer.h> |
1e307fab | 39 | #include <lttng/lttng.h> |
0c89d795 | 40 | #include <lttng/health-internal.h> |
a58c490f JG |
41 | #include <lttng/trigger/trigger-internal.h> |
42 | #include <lttng/endpoint.h> | |
43 | #include <lttng/channel-internal.h> | |
de453daa | 44 | #include <lttng/event-internal.h> |
15e37663 | 45 | #include <lttng/userspace-probe-internal.h> |
fac6795d | 46 | |
d00c599e DG |
47 | #include "filter/filter-ast.h" |
48 | #include "filter/filter-parser.h" | |
49 | #include "filter/filter-bytecode.h" | |
50 | #include "filter/memstream.h" | |
cac3069d | 51 | #include "lttng-ctl-helper.h" |
53a80697 MD |
52 | |
53 | #ifdef DEBUG | |
d00c599e | 54 | static const int print_xml = 1; |
53a80697 MD |
55 | #define dbg_printf(fmt, args...) \ |
56 | printf("[debug liblttng-ctl] " fmt, ## args) | |
57 | #else | |
d00c599e | 58 | static const int print_xml = 0; |
53a80697 MD |
59 | #define dbg_printf(fmt, args...) \ |
60 | do { \ | |
61 | /* do nothing but check printf format */ \ | |
62 | if (0) \ | |
63 | printf("[debug liblttnctl] " fmt, ## args); \ | |
64 | } while (0) | |
65 | #endif | |
66 | ||
67 | ||
fac6795d DG |
68 | /* Socket to session daemon for communication */ |
69 | static int sessiond_socket; | |
70 | static char sessiond_sock_path[PATH_MAX]; | |
71 | ||
fac6795d DG |
72 | /* Variables */ |
73 | static char *tracing_group; | |
74 | static int connected; | |
75 | ||
97e19046 DG |
76 | /* Global */ |
77 | ||
78 | /* | |
79 | * Those two variables are used by error.h to silent or control the verbosity of | |
80 | * error message. They are global to the library so application linking with it | |
81 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
82 | */ |
83 | int lttng_opt_quiet; | |
84 | int lttng_opt_verbose; | |
c7e35b03 | 85 | int lttng_opt_mi; |
97e19046 | 86 | |
99497cd0 MD |
87 | /* |
88 | * Copy string from src to dst and enforce null terminated byte. | |
89 | */ | |
cac3069d DG |
90 | LTTNG_HIDDEN |
91 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 92 | { |
e7d6716d | 93 | if (src && dst) { |
99497cd0 MD |
94 | strncpy(dst, src, len); |
95 | /* Enforce the NULL terminated byte */ | |
96 | dst[len - 1] = '\0'; | |
cd80958d DG |
97 | } else if (dst) { |
98 | dst[0] = '\0'; | |
99497cd0 MD |
99 | } |
100 | } | |
101 | ||
fac6795d | 102 | /* |
cd80958d | 103 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 104 | * |
cd80958d DG |
105 | * If domain is unknown, default domain will be the kernel. |
106 | */ | |
cac3069d DG |
107 | LTTNG_HIDDEN |
108 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
109 | struct lttng_domain *src) | |
cd80958d DG |
110 | { |
111 | if (src && dst) { | |
112 | switch (src->type) { | |
00e2e675 DG |
113 | case LTTNG_DOMAIN_KERNEL: |
114 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 115 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 116 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 117 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
118 | memcpy(dst, src, sizeof(struct lttng_domain)); |
119 | break; | |
120 | default: | |
121 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 122 | break; |
cd80958d DG |
123 | } |
124 | } | |
125 | } | |
126 | ||
127 | /* | |
128 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 129 | * |
1c8d13c8 TD |
130 | * On success, returns the number of bytes sent (>=0) |
131 | * On error, returns -1 | |
fac6795d | 132 | */ |
cd80958d | 133 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
134 | { |
135 | int ret; | |
136 | ||
137 | if (!connected) { | |
2f70b271 | 138 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 139 | goto end; |
fac6795d DG |
140 | } |
141 | ||
a4b92340 DG |
142 | DBG("LSM cmd type : %d", lsm->cmd_type); |
143 | ||
be040666 | 144 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 145 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
146 | if (ret < 0) { |
147 | ret = -LTTNG_ERR_FATAL; | |
148 | } | |
e065084a DG |
149 | |
150 | end: | |
151 | return ret; | |
152 | } | |
153 | ||
53a80697 MD |
154 | /* |
155 | * Send var len data to the session daemon. | |
156 | * | |
157 | * On success, returns the number of bytes sent (>=0) | |
158 | * On error, returns -1 | |
159 | */ | |
c2d69327 | 160 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
161 | { |
162 | int ret; | |
163 | ||
164 | if (!connected) { | |
2f70b271 | 165 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
166 | goto end; |
167 | } | |
a4b92340 | 168 | |
53a80697 MD |
169 | if (!data || !len) { |
170 | ret = 0; | |
171 | goto end; | |
172 | } | |
173 | ||
174 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
175 | if (ret < 0) { |
176 | ret = -LTTNG_ERR_FATAL; | |
177 | } | |
53a80697 MD |
178 | |
179 | end: | |
180 | return ret; | |
181 | } | |
182 | ||
a04d53fc FD |
183 | /* |
184 | * Send file descriptors to the session daemon. | |
185 | * | |
186 | * On success, returns the number of bytes sent (>=0) | |
187 | * On error, returns -1 | |
188 | */ | |
189 | static int send_session_fds(const int *fds, size_t nb_fd) | |
190 | { | |
191 | int ret; | |
192 | ||
193 | if (!connected) { | |
194 | ret = -LTTNG_ERR_NO_SESSIOND; | |
195 | goto end; | |
196 | } | |
197 | ||
198 | if (!fds || !nb_fd) { | |
199 | ret = 0; | |
200 | goto end; | |
201 | } | |
202 | ||
203 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
204 | if (ret < 0) { | |
205 | ret = -LTTNG_ERR_FATAL; | |
206 | } | |
207 | ||
208 | end: | |
209 | return ret; | |
210 | } | |
211 | ||
e065084a | 212 | /* |
cd80958d | 213 | * Receive data from the sessiond socket. |
e065084a | 214 | * |
1c8d13c8 TD |
215 | * On success, returns the number of bytes received (>=0) |
216 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 217 | */ |
ca95a216 | 218 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
219 | { |
220 | int ret; | |
221 | ||
222 | if (!connected) { | |
2f70b271 | 223 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 224 | goto end; |
fac6795d DG |
225 | } |
226 | ||
ca95a216 | 227 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
228 | if (ret < 0) { |
229 | ret = -LTTNG_ERR_FATAL; | |
230 | } | |
fac6795d | 231 | |
e065084a | 232 | end: |
fac6795d DG |
233 | return ret; |
234 | } | |
235 | ||
236 | /* | |
9ae110e2 | 237 | * Check if we are in the specified group. |
65beb5ff | 238 | * |
9ae110e2 | 239 | * If yes return 1, else return -1. |
947308c4 | 240 | */ |
6c71277b MD |
241 | LTTNG_HIDDEN |
242 | int lttng_check_tracing_group(void) | |
947308c4 DG |
243 | { |
244 | struct group *grp_tracing; /* no free(). See getgrnam(3) */ | |
245 | gid_t *grp_list; | |
246 | int grp_list_size, grp_id, i; | |
247 | int ret = -1; | |
6c71277b | 248 | const char *grp_name = tracing_group; |
947308c4 DG |
249 | |
250 | /* Get GID of group 'tracing' */ | |
251 | grp_tracing = getgrnam(grp_name); | |
b4d8603b MD |
252 | if (!grp_tracing) { |
253 | /* If grp_tracing is NULL, the group does not exist. */ | |
947308c4 DG |
254 | goto end; |
255 | } | |
256 | ||
257 | /* Get number of supplementary group IDs */ | |
258 | grp_list_size = getgroups(0, NULL); | |
259 | if (grp_list_size < 0) { | |
6f04ed72 | 260 | PERROR("getgroups"); |
947308c4 DG |
261 | goto end; |
262 | } | |
263 | ||
264 | /* Alloc group list of the right size */ | |
3f451dc0 | 265 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 266 | if (!grp_list) { |
6f04ed72 | 267 | PERROR("malloc"); |
00795392 MD |
268 | goto end; |
269 | } | |
947308c4 | 270 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 271 | if (grp_id < 0) { |
6f04ed72 | 272 | PERROR("getgroups"); |
947308c4 DG |
273 | goto free_list; |
274 | } | |
275 | ||
276 | for (i = 0; i < grp_list_size; i++) { | |
277 | if (grp_list[i] == grp_tracing->gr_gid) { | |
2269e89e | 278 | ret = 1; |
947308c4 DG |
279 | break; |
280 | } | |
281 | } | |
282 | ||
283 | free_list: | |
284 | free(grp_list); | |
285 | ||
286 | end: | |
287 | return ret; | |
288 | } | |
289 | ||
290 | /* | |
2269e89e DG |
291 | * Try connect to session daemon with sock_path. |
292 | * | |
293 | * Return 0 on success, else -1 | |
294 | */ | |
295 | static int try_connect_sessiond(const char *sock_path) | |
296 | { | |
297 | int ret; | |
298 | ||
299 | /* If socket exist, we check if the daemon listens for connect. */ | |
300 | ret = access(sock_path, F_OK); | |
301 | if (ret < 0) { | |
302 | /* Not alive */ | |
2f70b271 | 303 | goto error; |
2269e89e DG |
304 | } |
305 | ||
306 | ret = lttcomm_connect_unix_sock(sock_path); | |
307 | if (ret < 0) { | |
9ae110e2 | 308 | /* Not alive. */ |
2f70b271 | 309 | goto error; |
2269e89e DG |
310 | } |
311 | ||
312 | ret = lttcomm_close_unix_sock(ret); | |
313 | if (ret < 0) { | |
6f04ed72 | 314 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
315 | } |
316 | ||
317 | return 0; | |
2f70b271 DG |
318 | |
319 | error: | |
320 | return -1; | |
2269e89e DG |
321 | } |
322 | ||
323 | /* | |
2f70b271 DG |
324 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
325 | * variable. | |
326 | * | |
327 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
328 | * is somehow too long or ENOMEM). | |
947308c4 DG |
329 | */ |
330 | static int set_session_daemon_path(void) | |
331 | { | |
9ae110e2 | 332 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
333 | uid_t uid; |
334 | ||
335 | uid = getuid(); | |
947308c4 | 336 | |
2269e89e DG |
337 | if (uid != 0) { |
338 | /* Are we in the tracing group ? */ | |
6c71277b | 339 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
340 | } |
341 | ||
08a9c49f | 342 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
343 | lttng_ctl_copy_string(sessiond_sock_path, |
344 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 345 | } |
2269e89e | 346 | |
08a9c49f | 347 | if (uid != 0) { |
c617c0c6 MD |
348 | int ret; |
349 | ||
08a9c49f | 350 | if (in_tgroup) { |
9ae110e2 | 351 | /* Tracing group. */ |
08a9c49f TD |
352 | ret = try_connect_sessiond(sessiond_sock_path); |
353 | if (ret >= 0) { | |
354 | goto end; | |
2269e89e | 355 | } |
08a9c49f | 356 | /* Global session daemon not available... */ |
2269e89e | 357 | } |
08a9c49f TD |
358 | /* ...or not in tracing group (and not root), default */ |
359 | ||
360 | /* | |
9ae110e2 JG |
361 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
362 | * is too small; | |
363 | * With GNU C >= 2.1, snprintf returns the required size | |
364 | * (excluding closing null) | |
08a9c49f TD |
365 | */ |
366 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 367 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 368 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 369 | goto error; |
947308c4 | 370 | } |
947308c4 | 371 | } |
08a9c49f | 372 | end: |
947308c4 | 373 | return 0; |
2f70b271 DG |
374 | |
375 | error: | |
376 | return -1; | |
947308c4 DG |
377 | } |
378 | ||
65beb5ff | 379 | /* |
9ae110e2 | 380 | * Connect to the LTTng session daemon. |
65beb5ff | 381 | * |
9ae110e2 | 382 | * On success, return 0. On error, return -1. |
65beb5ff DG |
383 | */ |
384 | static int connect_sessiond(void) | |
385 | { | |
386 | int ret; | |
387 | ||
da3c9ec1 DG |
388 | /* Don't try to connect if already connected. */ |
389 | if (connected) { | |
390 | return 0; | |
391 | } | |
392 | ||
65beb5ff DG |
393 | ret = set_session_daemon_path(); |
394 | if (ret < 0) { | |
2f70b271 | 395 | goto error; |
65beb5ff DG |
396 | } |
397 | ||
9ae110e2 | 398 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
399 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
400 | if (ret < 0) { | |
2f70b271 | 401 | goto error; |
65beb5ff DG |
402 | } |
403 | ||
404 | sessiond_socket = ret; | |
405 | connected = 1; | |
406 | ||
407 | return 0; | |
2f70b271 DG |
408 | |
409 | error: | |
410 | return -1; | |
65beb5ff DG |
411 | } |
412 | ||
413 | /* | |
1c8d13c8 | 414 | * Clean disconnect from the session daemon. |
9ae110e2 | 415 | * |
1c8d13c8 | 416 | * On success, return 0. On error, return -1. |
65beb5ff DG |
417 | */ |
418 | static int disconnect_sessiond(void) | |
419 | { | |
420 | int ret = 0; | |
421 | ||
422 | if (connected) { | |
423 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
424 | sessiond_socket = 0; | |
425 | connected = 0; | |
426 | } | |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
795a978d PP |
431 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
432 | size_t *user_len) | |
433 | { | |
434 | int ret = 0; | |
435 | void *buf = NULL; | |
436 | ||
437 | if (len) { | |
438 | if (!user_len) { | |
439 | ret = -LTTNG_ERR_INVALID; | |
440 | goto end; | |
441 | } | |
442 | ||
443 | buf = zmalloc(len); | |
444 | if (!buf) { | |
445 | ret = -ENOMEM; | |
446 | goto end; | |
447 | } | |
448 | ||
449 | ret = recv_data_sessiond(buf, len); | |
450 | if (ret < 0) { | |
451 | goto end; | |
452 | } | |
453 | ||
454 | if (!user_buf) { | |
455 | ret = -LTTNG_ERR_INVALID; | |
456 | goto end; | |
457 | } | |
458 | ||
459 | /* Move ownership of command header buffer to user. */ | |
460 | *user_buf = buf; | |
461 | buf = NULL; | |
462 | *user_len = len; | |
463 | } else { | |
464 | /* No command header. */ | |
465 | if (user_len) { | |
466 | *user_len = 0; | |
467 | } | |
468 | ||
469 | if (user_buf) { | |
470 | *user_buf = NULL; | |
471 | } | |
472 | } | |
473 | ||
474 | end: | |
475 | free(buf); | |
476 | return ret; | |
477 | } | |
478 | ||
35a6fdb7 | 479 | /* |
cd80958d | 480 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
481 | * Takes extra var. len. data and file descriptors as input to send to the |
482 | * session daemon. | |
65beb5ff | 483 | * |
af87c45a | 484 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 485 | */ |
cac3069d | 486 | LTTNG_HIDDEN |
a04d53fc FD |
487 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
488 | const int *fds, size_t nb_fd, const void *vardata, | |
489 | size_t vardata_len, void **user_payload_buf, | |
490 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
491 | { |
492 | int ret; | |
795a978d | 493 | size_t payload_len; |
cd80958d | 494 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
495 | |
496 | ret = connect_sessiond(); | |
497 | if (ret < 0) { | |
2f70b271 | 498 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
499 | goto end; |
500 | } | |
501 | ||
65beb5ff | 502 | /* Send command to session daemon */ |
cd80958d | 503 | ret = send_session_msg(lsm); |
65beb5ff | 504 | if (ret < 0) { |
2f70b271 | 505 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
506 | goto end; |
507 | } | |
53a80697 | 508 | /* Send var len data */ |
795a978d | 509 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 510 | if (ret < 0) { |
2f70b271 | 511 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
512 | goto end; |
513 | } | |
65beb5ff | 514 | |
a04d53fc FD |
515 | /* Send fds */ |
516 | ret = send_session_fds(fds, nb_fd); | |
517 | if (ret < 0) { | |
518 | /* Ret value is a valid lttng error code. */ | |
519 | goto end; | |
520 | } | |
521 | ||
65beb5ff DG |
522 | /* Get header from data transmission */ |
523 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
524 | if (ret < 0) { | |
2f70b271 | 525 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
526 | goto end; |
527 | } | |
528 | ||
529 | /* Check error code if OK */ | |
f73fabfd | 530 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
531 | ret = -llm.ret_code; |
532 | goto end; | |
533 | } | |
534 | ||
795a978d PP |
535 | /* Get command header from data transmission */ |
536 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
537 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 538 | if (ret < 0) { |
65beb5ff DG |
539 | goto end; |
540 | } | |
541 | ||
795a978d PP |
542 | /* Get payload from data transmission */ |
543 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
544 | &payload_len); | |
545 | if (ret < 0) { | |
83009e5e DG |
546 | goto end; |
547 | } | |
548 | ||
795a978d | 549 | ret = llm.data_size; |
65beb5ff DG |
550 | |
551 | end: | |
552 | disconnect_sessiond(); | |
553 | return ret; | |
554 | } | |
555 | ||
9f19cc17 | 556 | /* |
cd80958d | 557 | * Create lttng handle and return pointer. |
9ae110e2 | 558 | * |
1c8d13c8 | 559 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 560 | */ |
cd80958d DG |
561 | struct lttng_handle *lttng_create_handle(const char *session_name, |
562 | struct lttng_domain *domain) | |
9f19cc17 | 563 | { |
2f70b271 DG |
564 | struct lttng_handle *handle = NULL; |
565 | ||
3f451dc0 | 566 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 567 | if (handle == NULL) { |
2f70b271 | 568 | PERROR("malloc handle"); |
cd80958d DG |
569 | goto end; |
570 | } | |
571 | ||
572 | /* Copy session name */ | |
cac3069d | 573 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
574 | sizeof(handle->session_name)); |
575 | ||
95681498 JG |
576 | /* Copy lttng domain or leave initialized to 0. */ |
577 | if (domain) { | |
578 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
579 | } | |
cd80958d DG |
580 | |
581 | end: | |
582 | return handle; | |
583 | } | |
584 | ||
585 | /* | |
586 | * Destroy handle by free(3) the pointer. | |
587 | */ | |
588 | void lttng_destroy_handle(struct lttng_handle *handle) | |
589 | { | |
0e428499 | 590 | free(handle); |
eb354453 DG |
591 | } |
592 | ||
d9800920 DG |
593 | /* |
594 | * Register an outside consumer. | |
9ae110e2 | 595 | * |
1c8d13c8 | 596 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
597 | */ |
598 | int lttng_register_consumer(struct lttng_handle *handle, | |
599 | const char *socket_path) | |
600 | { | |
601 | struct lttcomm_session_msg lsm; | |
602 | ||
2f70b271 DG |
603 | if (handle == NULL || socket_path == NULL) { |
604 | return -LTTNG_ERR_INVALID; | |
605 | } | |
606 | ||
53efb85a | 607 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 608 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 609 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 610 | sizeof(lsm.session.name)); |
cac3069d | 611 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 612 | |
9ae110e2 JG |
613 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
614 | sizeof(lsm.u.reg.path)); | |
d9800920 | 615 | |
cac3069d | 616 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
617 | } |
618 | ||
1df4dedd | 619 | /* |
9ae110e2 JG |
620 | * Start tracing for all traces of the session. |
621 | * | |
622 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 623 | */ |
6a4f824d | 624 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 625 | { |
cd80958d DG |
626 | struct lttcomm_session_msg lsm; |
627 | ||
6a4f824d | 628 | if (session_name == NULL) { |
2f70b271 | 629 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
630 | } |
631 | ||
53efb85a | 632 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 633 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 634 | |
cac3069d DG |
635 | lttng_ctl_copy_string(lsm.session.name, session_name, |
636 | sizeof(lsm.session.name)); | |
cd80958d | 637 | |
cac3069d | 638 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 639 | } |
1df4dedd DG |
640 | |
641 | /* | |
38ee087f | 642 | * Stop tracing for all traces of the session. |
f3ed775e | 643 | */ |
38ee087f | 644 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 645 | { |
38ee087f | 646 | int ret, data_ret; |
cd80958d DG |
647 | struct lttcomm_session_msg lsm; |
648 | ||
6a4f824d | 649 | if (session_name == NULL) { |
2f70b271 | 650 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
651 | } |
652 | ||
53efb85a | 653 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 654 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 655 | |
cac3069d DG |
656 | lttng_ctl_copy_string(lsm.session.name, session_name, |
657 | sizeof(lsm.session.name)); | |
cd80958d | 658 | |
cac3069d | 659 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
660 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
661 | goto error; | |
662 | } | |
663 | ||
664 | if (!wait) { | |
665 | goto end; | |
666 | } | |
667 | ||
38ee087f DG |
668 | /* Check for data availability */ |
669 | do { | |
6d805429 | 670 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
671 | if (data_ret < 0) { |
672 | /* Return the data available call error. */ | |
673 | ret = data_ret; | |
674 | goto error; | |
675 | } | |
676 | ||
677 | /* | |
9ae110e2 JG |
678 | * Data sleep time before retrying (in usec). Don't sleep if the |
679 | * call returned value indicates availability. | |
38ee087f | 680 | */ |
6d805429 | 681 | if (data_ret) { |
38ee087f | 682 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 683 | } |
6d805429 | 684 | } while (data_ret != 0); |
38ee087f | 685 | |
38ee087f DG |
686 | end: |
687 | error: | |
688 | return ret; | |
689 | } | |
690 | ||
691 | /* | |
692 | * Stop tracing and wait for data availability. | |
693 | */ | |
694 | int lttng_stop_tracing(const char *session_name) | |
695 | { | |
696 | return _lttng_stop_tracing(session_name, 1); | |
697 | } | |
698 | ||
699 | /* | |
700 | * Stop tracing but _don't_ wait for data availability. | |
701 | */ | |
702 | int lttng_stop_tracing_no_wait(const char *session_name) | |
703 | { | |
704 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
705 | } |
706 | ||
707 | /* | |
601d5acf DG |
708 | * Add context to a channel. |
709 | * | |
710 | * If the given channel is NULL, add the contexts to all channels. | |
711 | * The event_name param is ignored. | |
af87c45a DG |
712 | * |
713 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 714 | */ |
cd80958d | 715 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
716 | struct lttng_event_context *ctx, const char *event_name, |
717 | const char *channel_name) | |
d65106b1 | 718 | { |
2001793c JG |
719 | int ret; |
720 | size_t len = 0; | |
721 | char *buf = NULL; | |
cd80958d DG |
722 | struct lttcomm_session_msg lsm; |
723 | ||
9ae110e2 | 724 | /* Safety check. Both are mandatory. */ |
9d697d3d | 725 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
726 | ret = -LTTNG_ERR_INVALID; |
727 | goto end; | |
cd80958d DG |
728 | } |
729 | ||
441c16a7 | 730 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
731 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
732 | ||
85076754 MD |
733 | /* If no channel name, send empty string. */ |
734 | if (channel_name == NULL) { | |
735 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
736 | sizeof(lsm.u.context.channel_name)); | |
737 | } else { | |
738 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
739 | sizeof(lsm.u.context.channel_name)); | |
740 | } | |
cd80958d | 741 | |
cac3069d | 742 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cac3069d | 743 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
744 | sizeof(lsm.session.name)); |
745 | ||
2001793c JG |
746 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
747 | size_t provider_len, ctx_len; | |
748 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
749 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
750 | ||
751 | if (!provider_name || !ctx_name) { | |
752 | ret = -LTTNG_ERR_INVALID; | |
753 | goto end; | |
754 | } | |
755 | ||
756 | provider_len = strlen(provider_name); | |
757 | if (provider_len == 0) { | |
758 | ret = -LTTNG_ERR_INVALID; | |
759 | goto end; | |
760 | } | |
761 | lsm.u.context.provider_name_len = provider_len; | |
762 | ||
763 | ctx_len = strlen(ctx_name); | |
764 | if (ctx_len == 0) { | |
765 | ret = -LTTNG_ERR_INVALID; | |
766 | goto end; | |
767 | } | |
768 | lsm.u.context.context_name_len = ctx_len; | |
769 | ||
770 | len = provider_len + ctx_len; | |
771 | buf = zmalloc(len); | |
772 | if (!buf) { | |
773 | ret = -LTTNG_ERR_NOMEM; | |
774 | goto end; | |
775 | } | |
776 | ||
777 | memcpy(buf, provider_name, provider_len); | |
778 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
779 | } | |
780 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
781 | |
782 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
783 | /* | |
784 | * Don't leak application addresses to the sessiond. | |
785 | * This is only necessary when ctx is for an app ctx otherwise | |
786 | * the values inside the union (type & config) are overwritten. | |
787 | */ | |
788 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
789 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
790 | } | |
2001793c | 791 | |
795a978d | 792 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
793 | end: |
794 | free(buf); | |
795 | return ret; | |
d65106b1 DG |
796 | } |
797 | ||
f3ed775e | 798 | /* |
9ae110e2 JG |
799 | * Enable event(s) for a channel. |
800 | * | |
801 | * If no event name is specified, all events are enabled. | |
802 | * If no channel name is specified, the default 'channel0' is used. | |
803 | * | |
804 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 805 | */ |
cd80958d | 806 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 807 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 808 | { |
f8a96544 JI |
809 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
810 | NULL, 0, NULL); | |
1df4dedd DG |
811 | } |
812 | ||
53a80697 | 813 | /* |
025faf73 | 814 | * Create or enable an event with a filter expression. |
178191b3 | 815 | * |
53a80697 MD |
816 | * Return negative error value on error. |
817 | * Return size of returned session payload data if OK. | |
818 | */ | |
025faf73 | 819 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 820 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
821 | const char *filter_expression) |
822 | { | |
f8a96544 JI |
823 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
824 | filter_expression, 0, NULL); | |
53a80697 MD |
825 | } |
826 | ||
347c5ab5 | 827 | /* |
0e115563 | 828 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
829 | * NULL if not applicable. |
830 | * | |
831 | * An event with NO loglevel and the name is * will return NULL. | |
832 | */ | |
0e115563 | 833 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
834 | { |
835 | int err; | |
0e115563 | 836 | char *agent_filter = NULL; |
347c5ab5 DG |
837 | |
838 | assert(ev); | |
839 | ||
840 | /* Don't add filter for the '*' event. */ | |
9f449915 | 841 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 842 | if (filter) { |
0e115563 | 843 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
844 | ev->name); |
845 | } else { | |
0e115563 | 846 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
847 | } |
848 | if (err < 0) { | |
849 | PERROR("asprintf"); | |
6a556f7b | 850 | goto error; |
347c5ab5 DG |
851 | } |
852 | } | |
853 | ||
854 | /* Add loglevel filtering if any for the JUL domain. */ | |
855 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
856 | char *op; | |
857 | ||
858 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
859 | op = ">="; | |
860 | } else { | |
861 | op = "=="; | |
862 | } | |
863 | ||
0e115563 | 864 | if (filter || agent_filter) { |
6a556f7b JG |
865 | char *new_filter; |
866 | ||
fb0edb23 | 867 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 868 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 869 | ev->loglevel); |
0e115563 DG |
870 | if (agent_filter) { |
871 | free(agent_filter); | |
6a556f7b | 872 | } |
0e115563 | 873 | agent_filter = new_filter; |
347c5ab5 | 874 | } else { |
0e115563 | 875 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
876 | ev->loglevel); |
877 | } | |
878 | if (err < 0) { | |
879 | PERROR("asprintf"); | |
6a556f7b | 880 | goto error; |
347c5ab5 DG |
881 | } |
882 | } | |
883 | ||
0e115563 | 884 | return agent_filter; |
6a556f7b | 885 | error: |
0e115563 | 886 | free(agent_filter); |
6a556f7b | 887 | return NULL; |
347c5ab5 DG |
888 | } |
889 | ||
137b9942 | 890 | /* |
ec166985 | 891 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
892 | * newly allocated parser context in ctxp and populate the lsm object with the |
893 | * expression len. | |
894 | * | |
895 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
896 | */ | |
897 | static int generate_filter(char *filter_expression, | |
898 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
899 | { | |
900 | int ret; | |
901 | struct filter_parser_ctx *ctx = NULL; | |
902 | FILE *fmem = NULL; | |
903 | ||
904 | assert(filter_expression); | |
905 | assert(lsm); | |
906 | assert(ctxp); | |
907 | ||
908 | /* | |
909 | * Casting const to non-const, as the underlying function will use it in | |
910 | * read-only mode. | |
911 | */ | |
912 | fmem = lttng_fmemopen((void *) filter_expression, | |
913 | strlen(filter_expression), "r"); | |
914 | if (!fmem) { | |
915 | fprintf(stderr, "Error opening memory as stream\n"); | |
916 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
917 | goto error; | |
918 | } | |
919 | ctx = filter_parser_ctx_alloc(fmem); | |
920 | if (!ctx) { | |
921 | fprintf(stderr, "Error allocating parser\n"); | |
922 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
923 | goto filter_alloc_error; | |
924 | } | |
925 | ret = filter_parser_ctx_append_ast(ctx); | |
926 | if (ret) { | |
927 | fprintf(stderr, "Parse error\n"); | |
928 | ret = -LTTNG_ERR_FILTER_INVAL; | |
929 | goto parse_error; | |
930 | } | |
137b9942 DG |
931 | if (print_xml) { |
932 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
933 | if (ret) { | |
934 | fflush(stdout); | |
935 | fprintf(stderr, "XML print error\n"); | |
936 | ret = -LTTNG_ERR_FILTER_INVAL; | |
937 | goto parse_error; | |
938 | } | |
939 | } | |
940 | ||
941 | dbg_printf("Generating IR... "); | |
942 | fflush(stdout); | |
943 | ret = filter_visitor_ir_generate(ctx); | |
944 | if (ret) { | |
945 | fprintf(stderr, "Generate IR error\n"); | |
946 | ret = -LTTNG_ERR_FILTER_INVAL; | |
947 | goto parse_error; | |
948 | } | |
949 | dbg_printf("done\n"); | |
950 | ||
951 | dbg_printf("Validating IR... "); | |
952 | fflush(stdout); | |
953 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
954 | if (ret) { | |
955 | ret = -LTTNG_ERR_FILTER_INVAL; | |
956 | goto parse_error; | |
957 | } | |
9f449915 PP |
958 | |
959 | /* Normalize globbing patterns in the expression. */ | |
960 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
961 | if (ret) { | |
962 | ret = -LTTNG_ERR_FILTER_INVAL; | |
963 | goto parse_error; | |
964 | } | |
965 | ||
9ae110e2 | 966 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
967 | ret = filter_visitor_ir_validate_string(ctx); |
968 | if (ret) { | |
969 | ret = -LTTNG_ERR_FILTER_INVAL; | |
970 | goto parse_error; | |
971 | } | |
9f449915 PP |
972 | |
973 | /* Validate globbing patterns in the expression. */ | |
974 | ret = filter_visitor_ir_validate_globbing(ctx); | |
975 | if (ret) { | |
976 | ret = -LTTNG_ERR_FILTER_INVAL; | |
977 | goto parse_error; | |
978 | } | |
979 | ||
137b9942 DG |
980 | dbg_printf("done\n"); |
981 | ||
982 | dbg_printf("Generating bytecode... "); | |
983 | fflush(stdout); | |
984 | ret = filter_visitor_bytecode_generate(ctx); | |
985 | if (ret) { | |
986 | fprintf(stderr, "Generate bytecode error\n"); | |
987 | ret = -LTTNG_ERR_FILTER_INVAL; | |
988 | goto parse_error; | |
989 | } | |
990 | dbg_printf("done\n"); | |
991 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
992 | bytecode_get_len(&ctx->bytecode->b)); | |
993 | ||
994 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
995 | + bytecode_get_len(&ctx->bytecode->b); | |
996 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
997 | ||
998 | /* No need to keep the memory stream. */ | |
999 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1000 | PERROR("fclose"); |
137b9942 DG |
1001 | } |
1002 | ||
1003 | *ctxp = ctx; | |
1004 | return 0; | |
1005 | ||
1006 | parse_error: | |
137b9942 DG |
1007 | filter_ir_free(ctx); |
1008 | filter_parser_ctx_free(ctx); | |
1009 | filter_alloc_error: | |
1010 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1011 | PERROR("fclose"); |
137b9942 DG |
1012 | } |
1013 | error: | |
1014 | return ret; | |
1015 | } | |
1016 | ||
93deb080 JI |
1017 | /* |
1018 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1019 | * If no event name is specified, all events are enabled. | |
1020 | * If no channel name is specified, the default name is used. | |
1021 | * If filter expression is not NULL, the filter is set for the event. | |
1022 | * If exclusion count is not zero, the exclusions are set for the event. | |
1023 | * Returns size of returned session payload data or a negative error code. | |
1024 | */ | |
1025 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1026 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1027 | const char *original_filter_expression, |
93deb080 JI |
1028 | int exclusion_count, char **exclusion_list) |
1029 | { | |
1030 | struct lttcomm_session_msg lsm; | |
15e37663 JG |
1031 | struct lttng_dynamic_buffer send_buffer; |
1032 | int ret = 0, i, fd_to_send = -1; | |
1033 | bool send_fd = false; | |
137b9942 | 1034 | unsigned int free_filter_expression = 0; |
93deb080 | 1035 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 FD |
1036 | |
1037 | memset(&send_buffer, 0, sizeof(send_buffer)); | |
1038 | ||
e9efbcd3 JG |
1039 | /* |
1040 | * Cast as non-const since we may replace the filter expression | |
1041 | * by a dynamically allocated string. Otherwise, the original | |
1042 | * string is not modified. | |
1043 | */ | |
1044 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1045 | |
1046 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1047 | ret = -LTTNG_ERR_INVALID; |
1048 | goto error; | |
93deb080 JI |
1049 | } |
1050 | ||
9ae110e2 JG |
1051 | /* |
1052 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1053 | * anyway, so treat this corner-case early to eliminate |
1054 | * lttng_fmemopen error for 0-byte allocation. | |
1055 | */ | |
1056 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1057 | ret = -LTTNG_ERR_INVALID; |
1058 | goto error; | |
93deb080 JI |
1059 | } |
1060 | ||
1061 | memset(&lsm, 0, sizeof(lsm)); | |
1062 | ||
1063 | /* If no channel name, send empty string. */ | |
1064 | if (channel_name == NULL) { | |
1065 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1066 | sizeof(lsm.u.enable.channel_name)); | |
1067 | } else { | |
1068 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1069 | sizeof(lsm.u.enable.channel_name)); | |
1070 | } | |
1071 | ||
18a720cd MD |
1072 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1073 | if (ev->name[0] == '\0') { | |
1074 | /* Enable all events */ | |
1075 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1076 | } |
93deb080 | 1077 | |
6565421f | 1078 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1079 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1080 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1081 | ||
1082 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1083 | sizeof(lsm.session.name)); | |
1084 | lsm.u.enable.exclusion_count = exclusion_count; | |
1085 | lsm.u.enable.bytecode_len = 0; | |
1086 | ||
93deb080 JI |
1087 | /* |
1088 | * We have either a filter or some exclusions, so we need to set up | |
9ae110e2 | 1089 | * a variable-length memory block from where to send the data. |
93deb080 | 1090 | */ |
15e37663 | 1091 | lttng_dynamic_buffer_init(&send_buffer); |
93deb080 | 1092 | |
9ae110e2 | 1093 | /* Parse filter expression. */ |
5cdb6027 | 1094 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1095 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1096 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1097 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1098 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1099 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1100 | char *agent_filter; | |
64226865 | 1101 | |
347c5ab5 | 1102 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1103 | agent_filter = set_agent_filter(filter_expression, ev); |
1104 | if (!agent_filter) { | |
137b9942 | 1105 | if (!filter_expression) { |
9ae110e2 JG |
1106 | /* |
1107 | * No JUL and no filter, just skip | |
1108 | * everything below. | |
1109 | */ | |
137b9942 DG |
1110 | goto ask_sessiond; |
1111 | } | |
64226865 DG |
1112 | } else { |
1113 | /* | |
9ae110e2 JG |
1114 | * With an agent filter, the original filter has |
1115 | * been added to it thus replace the filter | |
1116 | * expression. | |
64226865 | 1117 | */ |
0e115563 | 1118 | filter_expression = agent_filter; |
e9efbcd3 | 1119 | free_filter_expression = 1; |
9b21e6d5 | 1120 | } |
9b21e6d5 | 1121 | } |
93deb080 | 1122 | |
137b9942 | 1123 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1124 | if (ret) { |
137b9942 | 1125 | goto filter_error; |
93deb080 | 1126 | } |
6b453b5e JG |
1127 | } |
1128 | ||
15e37663 JG |
1129 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1130 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1131 | + lsm.u.enable.expression_len |
1132 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1133 | if (ret) { |
6b453b5e | 1134 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1135 | goto mem_error; |
6b453b5e | 1136 | } |
137b9942 | 1137 | |
9ae110e2 | 1138 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1139 | for (i = 0; i < exclusion_count; i++) { |
1140 | size_t exclusion_len; | |
1141 | ||
1142 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1143 | LTTNG_SYMBOL_NAME_LEN); | |
1144 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1145 | /* Exclusion is not NULL-terminated. */ | |
1146 | ret = -LTTNG_ERR_INVALID; | |
1147 | goto mem_error; | |
1148 | } | |
1149 | ||
1150 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1151 | *(exclusion_list + i), | |
1152 | LTTNG_SYMBOL_NAME_LEN); | |
1153 | if (ret) { | |
1154 | goto mem_error; | |
1155 | } | |
6b453b5e | 1156 | } |
15e37663 | 1157 | |
9ae110e2 | 1158 | /* Add filter expression next. */ |
15e37663 JG |
1159 | if (filter_expression) { |
1160 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1161 | filter_expression, lsm.u.enable.expression_len); | |
1162 | if (ret) { | |
1163 | goto mem_error; | |
1164 | } | |
6b453b5e | 1165 | } |
9ae110e2 | 1166 | /* Add filter bytecode next. */ |
137b9942 | 1167 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1168 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1169 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1170 | if (ret) { | |
1171 | goto mem_error; | |
1172 | } | |
1173 | } | |
1174 | if (ev->extended.ptr) { | |
1175 | struct lttng_event_extended *ev_ext = | |
1176 | (struct lttng_event_extended *) ev->extended.ptr; | |
1177 | ||
1178 | if (ev_ext->probe_location) { | |
1179 | /* | |
1180 | * lttng_userspace_probe_location_serialize returns the | |
1181 | * number of bytes that was appended to the buffer. | |
1182 | */ | |
1183 | ret = lttng_userspace_probe_location_serialize( | |
1184 | ev_ext->probe_location, &send_buffer, | |
1185 | &fd_to_send); | |
56f0bc67 | 1186 | if (ret < 0) { |
15e37663 JG |
1187 | goto mem_error; |
1188 | } | |
1189 | ||
1190 | send_fd = fd_to_send >= 0; | |
1191 | /* | |
1192 | * Set the size of the userspace probe location element | |
1193 | * of the buffer so that the receiving side knows where | |
1194 | * to split it. | |
1195 | */ | |
1196 | lsm.u.enable.userspace_probe_location_len = ret; | |
1197 | } | |
93deb080 JI |
1198 | } |
1199 | ||
15e37663 JG |
1200 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1201 | send_fd ? &fd_to_send : NULL, | |
1202 | send_fd ? 1 : 0, | |
1203 | send_buffer.size ? send_buffer.data : NULL, | |
1204 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1205 | |
7ca1dc6f DG |
1206 | mem_error: |
1207 | if (filter_expression && ctx) { | |
93deb080 JI |
1208 | filter_bytecode_free(ctx); |
1209 | filter_ir_free(ctx); | |
1210 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1211 | } |
1212 | filter_error: | |
1213 | if (free_filter_expression) { | |
1214 | /* | |
9ae110e2 JG |
1215 | * The filter expression has been replaced and must be freed as |
1216 | * it is not the original filter expression received as a | |
1217 | * parameter. | |
7ca1dc6f DG |
1218 | */ |
1219 | free(filter_expression); | |
93deb080 | 1220 | } |
137b9942 DG |
1221 | error: |
1222 | /* | |
9ae110e2 JG |
1223 | * Return directly to the caller and don't ask the sessiond since |
1224 | * something went wrong in the parsing of data above. | |
137b9942 | 1225 | */ |
15e37663 | 1226 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1227 | return ret; |
3e1c9ff7 DG |
1228 | |
1229 | ask_sessiond: | |
1230 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1231 | return ret; | |
93deb080 JI |
1232 | } |
1233 | ||
6e911cad MD |
1234 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1235 | struct lttng_event *ev, const char *channel_name, | |
1236 | const char *original_filter_expression) | |
1df4dedd | 1237 | { |
cd80958d | 1238 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1239 | char *varlen_data; |
1240 | int ret = 0; | |
1241 | unsigned int free_filter_expression = 0; | |
1242 | struct filter_parser_ctx *ctx = NULL; | |
1243 | /* | |
1244 | * Cast as non-const since we may replace the filter expression | |
1245 | * by a dynamically allocated string. Otherwise, the original | |
1246 | * string is not modified. | |
1247 | */ | |
1248 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1249 | |
6e911cad MD |
1250 | if (handle == NULL || ev == NULL) { |
1251 | ret = -LTTNG_ERR_INVALID; | |
1252 | goto error; | |
1253 | } | |
1254 | ||
9ae110e2 JG |
1255 | /* |
1256 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1257 | * anyway, so treat this corner-case early to eliminate |
1258 | * lttng_fmemopen error for 0-byte allocation. | |
1259 | */ | |
1260 | if (filter_expression && filter_expression[0] == '\0') { | |
1261 | ret = -LTTNG_ERR_INVALID; | |
1262 | goto error; | |
cd80958d DG |
1263 | } |
1264 | ||
441c16a7 MD |
1265 | memset(&lsm, 0, sizeof(lsm)); |
1266 | ||
85076754 MD |
1267 | /* If no channel name, send empty string. */ |
1268 | if (channel_name == NULL) { | |
1269 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1270 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1271 | } else { |
85076754 | 1272 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1273 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1274 | } |
1275 | ||
18a720cd | 1276 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1277 | |
6e911cad MD |
1278 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1279 | /* FIXME: copying non-packed struct to packed struct. */ | |
1280 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1281 | ||
cac3069d | 1282 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1283 | sizeof(lsm.session.name)); |
6e911cad | 1284 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1285 | |
6e911cad MD |
1286 | /* |
1287 | * For the JUL domain, a filter is enforced except for the | |
1288 | * disable all event. This is done to avoid having the event in | |
1289 | * all sessions thus filtering by logger name. | |
1290 | */ | |
1291 | if (filter_expression == NULL && | |
1292 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1293 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1294 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1295 | goto ask_sessiond; |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | * We have a filter, so we need to set up a variable-length | |
1300 | * memory block from where to send the data. | |
1301 | */ | |
1302 | ||
1303 | /* Parse filter expression */ | |
1304 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1305 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1306 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1307 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1308 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1309 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1310 | char *agent_filter; | |
6e911cad MD |
1311 | |
1312 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1313 | agent_filter = set_agent_filter(filter_expression, ev); |
1314 | if (!agent_filter) { | |
6e911cad | 1315 | if (!filter_expression) { |
9ae110e2 JG |
1316 | /* |
1317 | * No JUL and no filter, just skip | |
1318 | * everything below. | |
1319 | */ | |
6e911cad MD |
1320 | goto ask_sessiond; |
1321 | } | |
1322 | } else { | |
1323 | /* | |
9ae110e2 JG |
1324 | * With a JUL filter, the original filter has |
1325 | * been added to it thus replace the filter | |
1326 | * expression. | |
6e911cad | 1327 | */ |
0e115563 | 1328 | filter_expression = agent_filter; |
6e911cad MD |
1329 | free_filter_expression = 1; |
1330 | } | |
1331 | } | |
1332 | ||
1333 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1334 | if (ret) { | |
1335 | goto filter_error; | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1340 | + lsm.u.disable.expression_len); | |
1341 | if (!varlen_data) { | |
1342 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1343 | goto mem_error; | |
1344 | } | |
1345 | ||
9ae110e2 | 1346 | /* Add filter expression. */ |
6e911cad MD |
1347 | if (lsm.u.disable.expression_len != 0) { |
1348 | memcpy(varlen_data, | |
1349 | filter_expression, | |
1350 | lsm.u.disable.expression_len); | |
1351 | } | |
9ae110e2 | 1352 | /* Add filter bytecode next. */ |
6e911cad MD |
1353 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1354 | memcpy(varlen_data | |
1355 | + lsm.u.disable.expression_len, | |
1356 | &ctx->bytecode->b, | |
1357 | lsm.u.disable.bytecode_len); | |
1358 | } | |
1359 | ||
795a978d | 1360 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1361 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1362 | free(varlen_data); | |
1363 | ||
1364 | mem_error: | |
1365 | if (filter_expression && ctx) { | |
1366 | filter_bytecode_free(ctx); | |
1367 | filter_ir_free(ctx); | |
1368 | filter_parser_ctx_free(ctx); | |
1369 | } | |
1370 | filter_error: | |
1371 | if (free_filter_expression) { | |
1372 | /* | |
9ae110e2 JG |
1373 | * The filter expression has been replaced and must be freed as |
1374 | * it is not the original filter expression received as a | |
1375 | * parameter. | |
6e911cad MD |
1376 | */ |
1377 | free(filter_expression); | |
1378 | } | |
1379 | error: | |
1380 | /* | |
9ae110e2 JG |
1381 | * Return directly to the caller and don't ask the sessiond since |
1382 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1383 | */ |
1384 | return ret; | |
1385 | ||
1386 | ask_sessiond: | |
1387 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1388 | return ret; | |
1389 | } | |
1390 | ||
1391 | /* | |
9ae110e2 JG |
1392 | * Disable event(s) of a channel and domain. |
1393 | * If no event name is specified, all events are disabled. | |
1394 | * If no channel name is specified, the default 'channel0' is used. | |
1395 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1396 | */ |
1397 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1398 | const char *channel_name) | |
1399 | { | |
1400 | struct lttng_event ev; | |
1401 | ||
1402 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1403 | ev.loglevel = -1; |
6e911cad MD |
1404 | ev.type = LTTNG_EVENT_ALL; |
1405 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1406 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1407 | } |
1408 | ||
cf0bcb51 JG |
1409 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1410 | { | |
1411 | struct lttng_channel *channel = NULL; | |
1412 | struct lttng_channel_extended *extended = NULL; | |
1413 | ||
1414 | if (!domain) { | |
1415 | goto error; | |
1416 | } | |
1417 | ||
1418 | /* Validate domain. */ | |
1419 | switch (domain->type) { | |
1420 | case LTTNG_DOMAIN_UST: | |
1421 | switch (domain->buf_type) { | |
1422 | case LTTNG_BUFFER_PER_UID: | |
1423 | case LTTNG_BUFFER_PER_PID: | |
1424 | break; | |
1425 | default: | |
1426 | goto error; | |
1427 | } | |
1428 | break; | |
1429 | case LTTNG_DOMAIN_KERNEL: | |
1430 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1431 | goto error; | |
1432 | } | |
1433 | break; | |
1434 | default: | |
1435 | goto error; | |
1436 | } | |
1437 | ||
1438 | channel = zmalloc(sizeof(*channel)); | |
1439 | if (!channel) { | |
1440 | goto error; | |
1441 | } | |
1442 | ||
1443 | extended = zmalloc(sizeof(*extended)); | |
1444 | if (!extended) { | |
1445 | goto error; | |
1446 | } | |
1447 | ||
1448 | channel->attr.extended.ptr = extended; | |
1449 | ||
1450 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1451 | return channel; | |
1452 | error: | |
1453 | free(channel); | |
1454 | free(extended); | |
1455 | return NULL; | |
1456 | } | |
1457 | ||
1458 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1459 | { | |
1460 | if (!channel) { | |
1461 | return; | |
1462 | } | |
1463 | ||
1464 | if (channel->attr.extended.ptr) { | |
1465 | free(channel->attr.extended.ptr); | |
1466 | } | |
1467 | free(channel); | |
1468 | } | |
1469 | ||
1df4dedd | 1470 | /* |
9ae110e2 JG |
1471 | * Enable channel per domain |
1472 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1473 | */ |
cd80958d | 1474 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1475 | struct lttng_channel *in_chan) |
a5c5a2bd | 1476 | { |
cd80958d DG |
1477 | struct lttcomm_session_msg lsm; |
1478 | ||
9ae110e2 | 1479 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1480 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1481 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1482 | } |
1483 | ||
441c16a7 | 1484 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1485 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1486 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1487 | |
cf0bcb51 JG |
1488 | if (!in_chan->attr.extended.ptr) { |
1489 | struct lttng_channel *channel; | |
1490 | struct lttng_channel_extended *extended; | |
7d29a247 | 1491 | |
cf0bcb51 JG |
1492 | channel = lttng_channel_create(&handle->domain); |
1493 | if (!channel) { | |
1494 | return -LTTNG_ERR_NOMEM; | |
1495 | } | |
1496 | ||
1497 | /* | |
1498 | * Create a new channel in order to use default extended | |
1499 | * attribute values. | |
1500 | */ | |
1501 | extended = (struct lttng_channel_extended *) | |
1502 | channel->attr.extended.ptr; | |
1503 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1504 | lttng_channel_destroy(channel); | |
1505 | } else { | |
1506 | struct lttng_channel_extended *extended; | |
1507 | ||
1508 | extended = (struct lttng_channel_extended *) | |
1509 | in_chan->attr.extended.ptr; | |
1510 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1511 | } | |
cd80958d | 1512 | |
cf0bcb51 | 1513 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
cac3069d | 1514 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1515 | |
cac3069d | 1516 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1517 | sizeof(lsm.session.name)); |
1518 | ||
cac3069d | 1519 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1520 | } |
1df4dedd | 1521 | |
2ef84c95 | 1522 | /* |
9ae110e2 JG |
1523 | * All tracing will be stopped for registered events of the channel. |
1524 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1525 | */ |
cd80958d | 1526 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1527 | { |
cd80958d DG |
1528 | struct lttcomm_session_msg lsm; |
1529 | ||
9ae110e2 | 1530 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1531 | if (handle == NULL || name == NULL) { |
2f70b271 | 1532 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1533 | } |
1534 | ||
441c16a7 MD |
1535 | memset(&lsm, 0, sizeof(lsm)); |
1536 | ||
cd80958d | 1537 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1538 | |
cac3069d | 1539 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1540 | sizeof(lsm.u.disable.channel_name)); |
1541 | ||
cac3069d | 1542 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1543 | |
cac3069d | 1544 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1545 | sizeof(lsm.session.name)); |
1546 | ||
cac3069d | 1547 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1548 | } |
1549 | ||
ccf10263 | 1550 | /* |
9ae110e2 JG |
1551 | * Add PID to session tracker. |
1552 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1553 | */ |
1554 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1555 | { | |
1556 | struct lttcomm_session_msg lsm; | |
1557 | ||
9ae110e2 | 1558 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1559 | if (handle == NULL) { |
1560 | return -LTTNG_ERR_INVALID; | |
1561 | } | |
1562 | ||
1563 | memset(&lsm, 0, sizeof(lsm)); | |
1564 | ||
1565 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1566 | lsm.u.pid_tracker.pid = pid; | |
1567 | ||
1568 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1569 | ||
1570 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1571 | sizeof(lsm.session.name)); | |
1572 | ||
1573 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1574 | } | |
1575 | ||
1576 | /* | |
9ae110e2 JG |
1577 | * Remove PID from session tracker. |
1578 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1579 | */ |
1580 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1581 | { | |
1582 | struct lttcomm_session_msg lsm; | |
1583 | ||
9ae110e2 | 1584 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1585 | if (handle == NULL) { |
1586 | return -LTTNG_ERR_INVALID; | |
1587 | } | |
1588 | ||
1589 | memset(&lsm, 0, sizeof(lsm)); | |
1590 | ||
1591 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1592 | lsm.u.pid_tracker.pid = pid; | |
1593 | ||
1594 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1595 | ||
1596 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1597 | sizeof(lsm.session.name)); | |
1598 | ||
1599 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1600 | } | |
1601 | ||
fac6795d | 1602 | /* |
9ae110e2 JG |
1603 | * Lists all available tracepoints of domain. |
1604 | * Sets the contents of the events array. | |
1605 | * Returns the number of lttng_event entries in events; | |
1606 | * on error, returns a negative value. | |
fac6795d | 1607 | */ |
cd80958d | 1608 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1609 | struct lttng_event **events) |
fac6795d | 1610 | { |
052da939 | 1611 | int ret; |
cd80958d DG |
1612 | struct lttcomm_session_msg lsm; |
1613 | ||
9d697d3d | 1614 | if (handle == NULL) { |
2f70b271 | 1615 | return -LTTNG_ERR_INVALID; |
cd80958d | 1616 | } |
fac6795d | 1617 | |
53efb85a | 1618 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1619 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1620 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1621 | |
cac3069d | 1622 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1623 | if (ret < 0) { |
1624 | return ret; | |
eb354453 | 1625 | } |
fac6795d | 1626 | |
9f19cc17 | 1627 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1628 | } |
1629 | ||
f37d259d | 1630 | /* |
9ae110e2 JG |
1631 | * Lists all available tracepoint fields of domain. |
1632 | * Sets the contents of the event field array. | |
1633 | * Returns the number of lttng_event_field entries in events; | |
1634 | * on error, returns a negative value. | |
f37d259d MD |
1635 | */ |
1636 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1637 | struct lttng_event_field **fields) | |
1638 | { | |
1639 | int ret; | |
1640 | struct lttcomm_session_msg lsm; | |
1641 | ||
1642 | if (handle == NULL) { | |
2f70b271 | 1643 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1644 | } |
1645 | ||
53efb85a | 1646 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1647 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1648 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1649 | |
cac3069d | 1650 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1651 | if (ret < 0) { |
1652 | return ret; | |
1653 | } | |
1654 | ||
1655 | return ret / sizeof(struct lttng_event_field); | |
1656 | } | |
1657 | ||
834978fd | 1658 | /* |
9ae110e2 JG |
1659 | * Lists all available kernel system calls. Allocates and sets the contents of |
1660 | * the events array. | |
834978fd | 1661 | * |
9ae110e2 JG |
1662 | * Returns the number of lttng_event entries in events; on error, returns a |
1663 | * negative value. | |
834978fd DG |
1664 | */ |
1665 | int lttng_list_syscalls(struct lttng_event **events) | |
1666 | { | |
1667 | int ret; | |
1668 | struct lttcomm_session_msg lsm; | |
1669 | ||
1670 | if (!events) { | |
1671 | return -LTTNG_ERR_INVALID; | |
1672 | } | |
1673 | ||
1674 | memset(&lsm, 0, sizeof(lsm)); | |
1675 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1676 | /* Force kernel domain for system calls. */ | |
1677 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1678 | ||
1679 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1680 | if (ret < 0) { | |
1681 | return ret; | |
1682 | } | |
1683 | ||
1684 | return ret / sizeof(struct lttng_event); | |
1685 | } | |
1686 | ||
1657e9bb | 1687 | /* |
9ae110e2 JG |
1688 | * Returns a human readable string describing |
1689 | * the error code (a negative value). | |
1657e9bb | 1690 | */ |
9a745bc7 | 1691 | const char *lttng_strerror(int code) |
1657e9bb | 1692 | { |
f73fabfd | 1693 | return error_get_str(code); |
1657e9bb DG |
1694 | } |
1695 | ||
aaf97519 | 1696 | /* |
a4b92340 DG |
1697 | * Create a brand new session using name and url for destination. |
1698 | * | |
f73fabfd | 1699 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1700 | */ |
a4b92340 | 1701 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1702 | { |
3dd05a85 | 1703 | int ret; |
a4b92340 | 1704 | ssize_t size; |
00e2e675 | 1705 | struct lttcomm_session_msg lsm; |
a4b92340 | 1706 | struct lttng_uri *uris = NULL; |
00e2e675 | 1707 | |
a4b92340 | 1708 | if (name == NULL) { |
2f70b271 | 1709 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1710 | } |
1711 | ||
a4b92340 | 1712 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1713 | |
a4b92340 | 1714 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1715 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1716 | |
1717 | /* There should never be a data URL */ | |
bc894455 | 1718 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1719 | if (size < 0) { |
2f70b271 | 1720 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1721 | } |
1722 | ||
a4b92340 DG |
1723 | lsm.u.uri.size = size; |
1724 | ||
795a978d | 1725 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1726 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1727 | |
1728 | free(uris); | |
1729 | return ret; | |
00e2e675 DG |
1730 | } |
1731 | ||
8028d920 | 1732 | /* |
9ae110e2 JG |
1733 | * Destroy session using name. |
1734 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1735 | */ |
8fd2c92c | 1736 | static |
e20ee7c2 | 1737 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 1738 | { |
cd80958d DG |
1739 | struct lttcomm_session_msg lsm; |
1740 | ||
843f5df9 | 1741 | if (session_name == NULL) { |
2f70b271 | 1742 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1743 | } |
1744 | ||
53efb85a | 1745 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1746 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1747 | |
cac3069d DG |
1748 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1749 | sizeof(lsm.session.name)); | |
cd80958d | 1750 | |
cac3069d | 1751 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1752 | } |
1753 | ||
e20ee7c2 JD |
1754 | /* |
1755 | * Stop the session and wait for the data before destroying it | |
1756 | */ | |
1757 | int lttng_destroy_session(const char *session_name) | |
1758 | { | |
1759 | int ret; | |
1760 | ||
1761 | /* | |
1762 | * Stop the tracing and wait for the data. | |
1763 | */ | |
1764 | ret = _lttng_stop_tracing(session_name, 1); | |
1765 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1766 | goto end; | |
1767 | } | |
1768 | ||
1769 | ret = _lttng_destroy_session(session_name); | |
1770 | end: | |
1771 | return ret; | |
1772 | } | |
1773 | ||
1774 | /* | |
1775 | * Destroy the session without waiting for the data. | |
1776 | */ | |
1777 | int lttng_destroy_session_no_wait(const char *session_name) | |
1778 | { | |
1779 | int ret; | |
1780 | ||
1781 | /* | |
1782 | * Stop the tracing without waiting for the data. | |
1783 | * The session might already have been stopped, so just | |
1784 | * skip this error. | |
1785 | */ | |
1786 | ret = _lttng_stop_tracing(session_name, 0); | |
1787 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1788 | goto end; | |
1789 | } | |
1790 | ||
1791 | ret = _lttng_destroy_session(session_name); | |
1792 | end: | |
1793 | return ret; | |
1794 | } | |
1795 | ||
57167058 | 1796 | /* |
9ae110e2 JG |
1797 | * Ask the session daemon for all available sessions. |
1798 | * Sets the contents of the sessions array. | |
1799 | * Returns the number of lttng_session entries in sessions; | |
1800 | * on error, returns a negative value. | |
57167058 | 1801 | */ |
ca95a216 | 1802 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1803 | { |
ca95a216 | 1804 | int ret; |
cd80958d | 1805 | struct lttcomm_session_msg lsm; |
57167058 | 1806 | |
53efb85a | 1807 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1808 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1809 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1810 | if (ret < 0) { |
ca95a216 | 1811 | return ret; |
57167058 DG |
1812 | } |
1813 | ||
ca95a216 | 1814 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1815 | } |
1816 | ||
d7ba1388 MD |
1817 | int lttng_set_session_shm_path(const char *session_name, |
1818 | const char *shm_path) | |
1819 | { | |
1820 | struct lttcomm_session_msg lsm; | |
1821 | ||
1822 | if (session_name == NULL) { | |
1823 | return -LTTNG_ERR_INVALID; | |
1824 | } | |
1825 | ||
1826 | memset(&lsm, 0, sizeof(lsm)); | |
1827 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1828 | ||
1829 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1830 | sizeof(lsm.session.name)); | |
1831 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1832 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1833 | ||
1834 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1835 | } | |
1836 | ||
9f19cc17 | 1837 | /* |
9ae110e2 JG |
1838 | * Ask the session daemon for all available domains of a session. |
1839 | * Sets the contents of the domains array. | |
1840 | * Returns the number of lttng_domain entries in domains; | |
1841 | * on error, returns a negative value. | |
9f19cc17 | 1842 | */ |
330be774 | 1843 | int lttng_list_domains(const char *session_name, |
cd80958d | 1844 | struct lttng_domain **domains) |
9f19cc17 DG |
1845 | { |
1846 | int ret; | |
cd80958d DG |
1847 | struct lttcomm_session_msg lsm; |
1848 | ||
330be774 | 1849 | if (session_name == NULL) { |
2f70b271 | 1850 | return -LTTNG_ERR_INVALID; |
cd80958d | 1851 | } |
9f19cc17 | 1852 | |
53efb85a | 1853 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1854 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1855 | ||
cac3069d DG |
1856 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1857 | sizeof(lsm.session.name)); | |
cd80958d | 1858 | |
cac3069d | 1859 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1860 | if (ret < 0) { |
1861 | return ret; | |
1862 | } | |
1863 | ||
1864 | return ret / sizeof(struct lttng_domain); | |
1865 | } | |
1866 | ||
1867 | /* | |
9ae110e2 JG |
1868 | * Ask the session daemon for all available channels of a session. |
1869 | * Sets the contents of the channels array. | |
1870 | * Returns the number of lttng_channel entries in channels; | |
1871 | * on error, returns a negative value. | |
9f19cc17 | 1872 | */ |
cd80958d DG |
1873 | int lttng_list_channels(struct lttng_handle *handle, |
1874 | struct lttng_channel **channels) | |
9f19cc17 DG |
1875 | { |
1876 | int ret; | |
53e367f9 JG |
1877 | size_t channel_count, i; |
1878 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 1879 | sizeof(struct lttng_channel_extended); |
cd80958d | 1880 | struct lttcomm_session_msg lsm; |
53e367f9 | 1881 | void *extended_at; |
cd80958d | 1882 | |
9d697d3d | 1883 | if (handle == NULL) { |
53e367f9 JG |
1884 | ret = -LTTNG_ERR_INVALID; |
1885 | goto end; | |
cd80958d DG |
1886 | } |
1887 | ||
53efb85a | 1888 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1889 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1890 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1891 | sizeof(lsm.session.name)); |
9f19cc17 | 1892 | |
cac3069d | 1893 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1894 | |
cac3069d | 1895 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 1896 | if (ret < 0) { |
53e367f9 JG |
1897 | goto end; |
1898 | } | |
1899 | ||
1900 | if (ret % channel_size) { | |
1901 | ret = -LTTNG_ERR_UNK; | |
1902 | free(*channels); | |
1903 | *channels = NULL; | |
1904 | goto end; | |
9f19cc17 | 1905 | } |
53e367f9 | 1906 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 1907 | |
53e367f9 JG |
1908 | /* Set extended info pointers */ |
1909 | extended_at = ((void *) *channels) + | |
1910 | channel_count * sizeof(struct lttng_channel); | |
1911 | for (i = 0; i < channel_count; i++) { | |
1912 | struct lttng_channel *chan = &(*channels)[i]; | |
1913 | ||
1914 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 1915 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
1916 | } |
1917 | ||
1918 | ret = (int) channel_count; | |
1919 | end: | |
1920 | return ret; | |
9f19cc17 DG |
1921 | } |
1922 | ||
1923 | /* | |
9ae110e2 JG |
1924 | * Ask the session daemon for all available events of a session channel. |
1925 | * Sets the contents of the events array. | |
1926 | * Returns the number of lttng_event entries in events; | |
1927 | * on error, returns a negative value. | |
9f19cc17 | 1928 | */ |
cd80958d DG |
1929 | int lttng_list_events(struct lttng_handle *handle, |
1930 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1931 | { |
1932 | int ret; | |
cd80958d | 1933 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
1934 | struct lttcomm_event_command_header *cmd_header = NULL; |
1935 | size_t cmd_header_len; | |
1936 | uint32_t nb_events, i; | |
de453daa | 1937 | void *comm_ext_at; |
de453daa | 1938 | char *reception_buffer = NULL; |
56f0bc67 | 1939 | struct lttng_dynamic_buffer listing; |
de453daa | 1940 | size_t storage_req; |
9f19cc17 | 1941 | |
9d697d3d DG |
1942 | /* Safety check. An handle and channel name are mandatory */ |
1943 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1944 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1945 | } |
1946 | ||
53efb85a | 1947 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1948 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1949 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1950 | sizeof(lsm.session.name)); |
cac3069d | 1951 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 1952 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 1953 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1954 | |
a04d53fc | 1955 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
1956 | (void **) &reception_buffer, (void **) &cmd_header, |
1957 | &cmd_header_len); | |
9f19cc17 | 1958 | if (ret < 0) { |
de453daa | 1959 | goto end; |
9f19cc17 DG |
1960 | } |
1961 | ||
b4e3ceb9 PP |
1962 | /* Set number of events and free command header */ |
1963 | nb_events = cmd_header->nb_events; | |
1964 | if (nb_events > INT_MAX) { | |
1965 | ret = -EOVERFLOW; | |
de453daa | 1966 | goto end; |
b4e3ceb9 | 1967 | } |
b4e3ceb9 PP |
1968 | free(cmd_header); |
1969 | cmd_header = NULL; | |
1970 | ||
de453daa JG |
1971 | /* |
1972 | * The buffer that is returned must contain a "flat" version of | |
1973 | * the events that are returned. In other words, all pointers | |
1974 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
1975 | * buffer so that the user may free everything by simply calling free() |
1976 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
1977 | * compatibility. |
1978 | * | |
56f0bc67 JG |
1979 | * A first pass is performed to compute the size of the buffer that |
1980 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
1981 | * the returned events so that their members always point within the |
1982 | * buffer. | |
1983 | * | |
1984 | * The layout of the returned buffer is as follows: | |
1985 | * - struct lttng_event[nb_events], | |
1986 | * - nb_events times the following: | |
1987 | * - struct lttng_event_extended, | |
1988 | * - flattened version of userspace_probe_location | |
1989 | * - filter_expression | |
1990 | * - exclusions | |
1991 | * - padding to align to 64-bits | |
1992 | */ | |
1993 | comm_ext_at = reception_buffer + | |
1994 | (nb_events * sizeof(struct lttng_event)); | |
1995 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
1996 | |
1997 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
1998 | struct lttcomm_event_extended_header *ext_comm = |
1999 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 2000 | int probe_storage_req = 0; |
b4e3ceb9 | 2001 | |
de453daa JG |
2002 | comm_ext_at += sizeof(*ext_comm); |
2003 | comm_ext_at += ext_comm->filter_len; | |
2004 | comm_ext_at += | |
2005 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2006 | ||
56f0bc67 JG |
2007 | if (ext_comm->userspace_probe_location_len) { |
2008 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2009 | struct lttng_buffer_view probe_location_view; | |
2010 | ||
2011 | probe_location_view = lttng_buffer_view_init( | |
2012 | comm_ext_at, 0, | |
2013 | ext_comm->userspace_probe_location_len); | |
2014 | ||
2015 | /* | |
2016 | * Create a temporary userspace probe location to | |
2017 | * determine the size needed by a "flattened" version | |
2018 | * of that same probe location. | |
2019 | */ | |
2020 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2021 | &probe_location_view, &probe_location); | |
2022 | if (ret < 0) { | |
2023 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2024 | goto end; | |
2025 | } | |
2026 | ||
2027 | ret = lttng_userspace_probe_location_flatten( | |
2028 | probe_location, NULL); | |
2029 | lttng_userspace_probe_location_destroy(probe_location); | |
2030 | if (ret < 0) { | |
2031 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2032 | goto end; | |
2033 | } | |
2034 | ||
2035 | probe_storage_req = ret; | |
2036 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2037 | ret = 0; | |
2038 | } | |
2039 | ||
de453daa | 2040 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2041 | storage_req += ext_comm->filter_len; |
2042 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2043 | /* Padding to ensure the flat probe is aligned. */ |
2044 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2045 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2046 | } |
2047 | ||
56f0bc67 JG |
2048 | lttng_dynamic_buffer_init(&listing); |
2049 | /* | |
2050 | * We must ensure that "listing" is never resized so as to preserve | |
2051 | * the validity of the flattened objects. | |
2052 | */ | |
2053 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2054 | if (ret) { | |
2055 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2056 | goto end; |
2057 | } | |
56f0bc67 JG |
2058 | |
2059 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2060 | nb_events * sizeof(struct lttng_event)); | |
2061 | if (ret) { | |
2062 | ret = -LTTNG_ERR_NOMEM; | |
2063 | goto free_dynamic_buffer; | |
2064 | } | |
de453daa JG |
2065 | |
2066 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2067 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2068 | for (i = 0; i < nb_events; i++) { |
2069 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2070 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2071 | struct lttcomm_event_extended_header *ext_comm = |
2072 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2073 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2074 | (struct lttng_event_extended *) |
2075 | (listing.data + listing.size); | |
de453daa | 2076 | |
56f0bc67 JG |
2077 | /* Insert struct lttng_event_extended. */ |
2078 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2079 | listing.size + sizeof(*event_extended)); | |
2080 | if (ret) { | |
2081 | ret = -LTTNG_ERR_NOMEM; | |
2082 | goto free_dynamic_buffer; | |
2083 | } | |
de453daa | 2084 | event->extended.ptr = event_extended; |
56f0bc67 | 2085 | |
de453daa JG |
2086 | comm_ext_at += sizeof(*ext_comm); |
2087 | ||
56f0bc67 JG |
2088 | /* Insert filter expression. */ |
2089 | if (ext_comm->filter_len) { | |
2090 | event_extended->filter_expression = listing.data + | |
2091 | listing.size; | |
2092 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2093 | ext_comm->filter_len); | |
2094 | if (ret) { | |
2095 | ret = -LTTNG_ERR_NOMEM; | |
2096 | goto free_dynamic_buffer; | |
2097 | } | |
2098 | comm_ext_at += ext_comm->filter_len; | |
2099 | } | |
2100 | ||
2101 | /* Insert exclusions. */ | |
2102 | if (ext_comm->nb_exclusions) { | |
2103 | event_extended->exclusions.count = | |
2104 | ext_comm->nb_exclusions; | |
2105 | event_extended->exclusions.strings = | |
2106 | listing.data + listing.size; | |
2107 | ||
2108 | ret = lttng_dynamic_buffer_append(&listing, | |
2109 | comm_ext_at, | |
2110 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2111 | if (ret) { | |
2112 | ret = -LTTNG_ERR_NOMEM; | |
2113 | } | |
2114 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2115 | } | |
2116 | ||
2117 | /* Insert padding to align to 64-bits. */ | |
2118 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2119 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2120 | if (ret) { | |
2121 | ret = -LTTNG_ERR_NOMEM; | |
2122 | goto free_dynamic_buffer; | |
2123 | } | |
2124 | ||
2125 | /* Insert flattened userspace probe location. */ | |
2126 | if (ext_comm->userspace_probe_location_len) { | |
2127 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2128 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2129 | |
56f0bc67 JG |
2130 | probe_location_view = lttng_buffer_view_init( |
2131 | comm_ext_at, 0, | |
2132 | ext_comm->userspace_probe_location_len); | |
de453daa | 2133 | |
56f0bc67 JG |
2134 | ret = lttng_userspace_probe_location_create_from_buffer( |
2135 | &probe_location_view, &probe_location); | |
2136 | if (ret < 0) { | |
2137 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2138 | goto free_dynamic_buffer; | |
2139 | } | |
2140 | ||
2141 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2142 | (listing.data + listing.size); | |
2143 | ret = lttng_userspace_probe_location_flatten( | |
2144 | probe_location, &listing); | |
2145 | lttng_userspace_probe_location_destroy(probe_location); | |
2146 | if (ret < 0) { | |
2147 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2148 | goto free_dynamic_buffer; | |
2149 | } | |
2150 | ||
2151 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2152 | } | |
de453daa JG |
2153 | } |
2154 | ||
56f0bc67 JG |
2155 | /* Don't reset listing buffer as we return its content. */ |
2156 | *events = (struct lttng_event *) listing.data; | |
2157 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2158 | ret = (int) nb_events; |
56f0bc67 JG |
2159 | free_dynamic_buffer: |
2160 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2161 | end: |
b4e3ceb9 | 2162 | free(cmd_header); |
de453daa | 2163 | free(reception_buffer); |
b4e3ceb9 | 2164 | return ret; |
9f19cc17 DG |
2165 | } |
2166 | ||
fac6795d | 2167 | /* |
1c8d13c8 TD |
2168 | * Sets the tracing_group variable with name. |
2169 | * This function allocates memory pointed to by tracing_group. | |
2170 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2171 | */ |
2172 | int lttng_set_tracing_group(const char *name) | |
2173 | { | |
9d697d3d | 2174 | if (name == NULL) { |
2f70b271 | 2175 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2176 | } |
2177 | ||
fac6795d | 2178 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2179 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2180 | } |
2181 | ||
2182 | return 0; | |
2183 | } | |
2184 | ||
cd80958d | 2185 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2186 | struct lttng_calibrate *calibrate) |
2187 | { | |
b812e5ca PP |
2188 | /* |
2189 | * This command was removed in LTTng 2.9. | |
2190 | */ | |
2191 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2192 | } |
2193 | ||
5edd7e09 DG |
2194 | /* |
2195 | * Set default channel attributes. | |
441c16a7 | 2196 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2197 | */ |
2198 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2199 | struct lttng_channel_attr *attr) | |
2200 | { | |
294851b0 | 2201 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2202 | |
5edd7e09 DG |
2203 | /* Safety check */ |
2204 | if (attr == NULL || domain == NULL) { | |
2205 | return; | |
2206 | } | |
2207 | ||
294851b0 | 2208 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2209 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2210 | ||
0a9c6494 DG |
2211 | /* Same for all domains. */ |
2212 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2213 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2214 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2215 | ||
5edd7e09 DG |
2216 | switch (domain->type) { |
2217 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2218 | attr->switch_timer_interval = |
2219 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2220 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2221 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2222 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2223 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2224 | if (extended) { |
2225 | extended->monitor_timer_interval = | |
2226 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2227 | extended->blocking_timeout = |
2228 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2229 | } |
5edd7e09 DG |
2230 | break; |
2231 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2232 | switch (domain->buf_type) { |
2233 | case LTTNG_BUFFER_PER_UID: | |
2234 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2235 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2236 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2237 | attr->switch_timer_interval = |
2238 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2239 | attr->read_timer_interval = | |
2240 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2241 | if (extended) { |
2242 | extended->monitor_timer_interval = | |
2243 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2244 | extended->blocking_timeout = |
2245 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2246 | } |
0a9c6494 DG |
2247 | break; |
2248 | case LTTNG_BUFFER_PER_PID: | |
2249 | default: | |
2250 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2251 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2252 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2253 | attr->switch_timer_interval = |
2254 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2255 | attr->read_timer_interval = | |
2256 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2257 | if (extended) { |
2258 | extended->monitor_timer_interval = | |
2259 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2260 | extended->blocking_timeout = |
2261 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2262 | } |
0a9c6494 DG |
2263 | break; |
2264 | } | |
5edd7e09 | 2265 | default: |
441c16a7 | 2266 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2267 | break; |
2268 | } | |
cf0bcb51 JG |
2269 | |
2270 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2271 | } |
2272 | ||
5ba3702f JG |
2273 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2274 | uint64_t *discarded_events) | |
2275 | { | |
2276 | int ret = 0; | |
cf0bcb51 | 2277 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2278 | |
2279 | if (!channel || !discarded_events) { | |
2280 | ret = -LTTNG_ERR_INVALID; | |
2281 | goto end; | |
2282 | } | |
2283 | ||
2284 | chan_ext = channel->attr.extended.ptr; | |
2285 | if (!chan_ext) { | |
2286 | /* | |
2287 | * This can happen since the lttng_channel structure is | |
2288 | * used for other tasks where this pointer is never set. | |
2289 | */ | |
2290 | *discarded_events = 0; | |
2291 | goto end; | |
2292 | } | |
2293 | ||
2294 | *discarded_events = chan_ext->discarded_events; | |
2295 | end: | |
2296 | return ret; | |
2297 | } | |
2298 | ||
2299 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2300 | uint64_t *lost_packets) | |
2301 | { | |
2302 | int ret = 0; | |
cf0bcb51 | 2303 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2304 | |
2305 | if (!channel || !lost_packets) { | |
2306 | ret = -LTTNG_ERR_INVALID; | |
2307 | goto end; | |
2308 | } | |
2309 | ||
2310 | chan_ext = channel->attr.extended.ptr; | |
2311 | if (!chan_ext) { | |
2312 | /* | |
2313 | * This can happen since the lttng_channel structure is | |
2314 | * used for other tasks where this pointer is never set. | |
2315 | */ | |
2316 | *lost_packets = 0; | |
2317 | goto end; | |
2318 | } | |
2319 | ||
2320 | *lost_packets = chan_ext->lost_packets; | |
2321 | end: | |
2322 | return ret; | |
2323 | } | |
2324 | ||
cf0bcb51 JG |
2325 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2326 | uint64_t *monitor_timer_interval) | |
2327 | { | |
2328 | int ret = 0; | |
2329 | ||
2330 | if (!chan || !monitor_timer_interval) { | |
2331 | ret = -LTTNG_ERR_INVALID; | |
2332 | goto end; | |
2333 | } | |
2334 | ||
2335 | if (!chan->attr.extended.ptr) { | |
2336 | ret = -LTTNG_ERR_INVALID; | |
2337 | goto end; | |
2338 | } | |
2339 | ||
2340 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2341 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2342 | end: | |
2343 | return ret; | |
2344 | } | |
2345 | ||
2346 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2347 | uint64_t monitor_timer_interval) | |
2348 | { | |
2349 | int ret = 0; | |
2350 | ||
2351 | if (!chan || !chan->attr.extended.ptr) { | |
2352 | ret = -LTTNG_ERR_INVALID; | |
2353 | goto end; | |
2354 | } | |
2355 | ||
2356 | ((struct lttng_channel_extended *) | |
2357 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2358 | monitor_timer_interval; | |
2359 | end: | |
2360 | return ret; | |
2361 | } | |
2362 | ||
491d1539 MD |
2363 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2364 | int64_t *blocking_timeout) | |
2365 | { | |
2366 | int ret = 0; | |
2367 | ||
2368 | if (!chan || !blocking_timeout) { | |
2369 | ret = -LTTNG_ERR_INVALID; | |
2370 | goto end; | |
2371 | } | |
2372 | ||
2373 | if (!chan->attr.extended.ptr) { | |
2374 | ret = -LTTNG_ERR_INVALID; | |
2375 | goto end; | |
2376 | } | |
2377 | ||
2378 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2379 | chan->attr.extended.ptr)->blocking_timeout; | |
2380 | end: | |
2381 | return ret; | |
2382 | } | |
2383 | ||
2384 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2385 | int64_t blocking_timeout) | |
2386 | { | |
2387 | int ret = 0; | |
2388 | int64_t msec_timeout; | |
2389 | ||
2390 | if (!chan || !chan->attr.extended.ptr) { | |
2391 | ret = -LTTNG_ERR_INVALID; | |
2392 | goto end; | |
2393 | } | |
2394 | ||
2395 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2396 | ret = -LTTNG_ERR_INVALID; | |
2397 | goto end; | |
2398 | } | |
2399 | ||
2400 | /* | |
2401 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2402 | * us to accept a narrower range of values (msecs expressed as a signed | |
2403 | * 32-bit integer). | |
2404 | */ | |
2405 | msec_timeout = blocking_timeout / 1000; | |
2406 | if (msec_timeout != (int32_t) msec_timeout) { | |
2407 | ret = -LTTNG_ERR_INVALID; | |
2408 | goto end; | |
2409 | } | |
2410 | ||
2411 | ((struct lttng_channel_extended *) | |
2412 | chan->attr.extended.ptr)->blocking_timeout = | |
2413 | blocking_timeout; | |
2414 | end: | |
2415 | return ret; | |
2416 | } | |
2417 | ||
fac6795d | 2418 | /* |
2269e89e | 2419 | * Check if session daemon is alive. |
fac6795d | 2420 | * |
2269e89e | 2421 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2422 | * On error returns a negative value. |
fac6795d | 2423 | */ |
947308c4 | 2424 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2425 | { |
2426 | int ret; | |
2427 | ||
2428 | ret = set_session_daemon_path(); | |
2429 | if (ret < 0) { | |
9ae110e2 | 2430 | /* Error. */ |
fac6795d DG |
2431 | return ret; |
2432 | } | |
2433 | ||
9d035200 | 2434 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2435 | /* |
9ae110e2 JG |
2436 | * No socket path set. Weird error which means the constructor |
2437 | * was not called. | |
2f70b271 DG |
2438 | */ |
2439 | assert(0); | |
fac6795d DG |
2440 | } |
2441 | ||
2269e89e | 2442 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2443 | if (ret < 0) { |
9ae110e2 | 2444 | /* Not alive. */ |
7d8234d9 MD |
2445 | return 0; |
2446 | } | |
7d8234d9 | 2447 | |
9ae110e2 | 2448 | /* Is alive. */ |
947308c4 | 2449 | return 1; |
fac6795d DG |
2450 | } |
2451 | ||
00e2e675 | 2452 | /* |
a4b92340 | 2453 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2454 | * |
2455 | * Return 0 on success, else a negative value. | |
2456 | */ | |
a4b92340 DG |
2457 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2458 | const char *control_url, const char *data_url) | |
00e2e675 | 2459 | { |
3dd05a85 | 2460 | int ret; |
a4b92340 | 2461 | ssize_t size; |
00e2e675 | 2462 | struct lttcomm_session_msg lsm; |
a4b92340 | 2463 | struct lttng_uri *uris = NULL; |
00e2e675 | 2464 | |
a4b92340 | 2465 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2466 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2467 | } |
2468 | ||
a4b92340 DG |
2469 | memset(&lsm, 0, sizeof(lsm)); |
2470 | ||
00e2e675 DG |
2471 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2472 | ||
cac3069d | 2473 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2474 | sizeof(lsm.session.name)); |
cac3069d | 2475 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2476 | |
bc894455 | 2477 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2478 | if (size < 0) { |
2f70b271 | 2479 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2480 | } |
2481 | ||
2482 | lsm.u.uri.size = size; | |
00e2e675 | 2483 | |
795a978d | 2484 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2485 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2486 | |
2487 | free(uris); | |
2488 | return ret; | |
00e2e675 DG |
2489 | } |
2490 | ||
2491 | /* | |
9c6bda17 | 2492 | * [OBSOLETE] |
00e2e675 DG |
2493 | */ |
2494 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2495 | { | |
785d2d0d | 2496 | return -ENOSYS; |
00e2e675 DG |
2497 | } |
2498 | ||
2499 | /* | |
9c6bda17 | 2500 | * [OBSOLETE] |
00e2e675 DG |
2501 | */ |
2502 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2503 | { | |
785d2d0d | 2504 | return -ENOSYS; |
00e2e675 DG |
2505 | } |
2506 | ||
07424f16 DG |
2507 | /* |
2508 | * This is an extension of create session that is ONLY and SHOULD only be used | |
2509 | * by the lttng command line program. It exists to avoid using URI parsing in | |
2510 | * the lttng client. | |
2511 | * | |
2512 | * We need the date and time for the trace path subdirectory for the case where | |
2513 | * the user does NOT define one using either -o or -U. Using the normal | |
2514 | * lttng_create_session API call, we have no clue on the session daemon side if | |
2515 | * the URL was generated automatically by the client or define by the user. | |
2516 | * | |
2517 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
2518 | * string and appends it if necessary to the URI subdirectory before sending it | |
2519 | * to the session daemon. | |
2520 | * | |
2521 | * With this extra function, the lttng_create_session call behavior is not | |
2522 | * changed and the timestamp is appended to the URI on the session daemon side | |
2523 | * if necessary. | |
2524 | */ | |
2525 | int _lttng_create_session_ext(const char *name, const char *url, | |
2526 | const char *datetime) | |
2527 | { | |
3dd05a85 | 2528 | int ret; |
07424f16 DG |
2529 | ssize_t size; |
2530 | struct lttcomm_session_msg lsm; | |
2531 | struct lttng_uri *uris = NULL; | |
2532 | ||
2bba9e53 | 2533 | if (name == NULL || datetime == NULL) { |
2f70b271 | 2534 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
2535 | } |
2536 | ||
2537 | memset(&lsm, 0, sizeof(lsm)); | |
2538 | ||
2539 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 2540 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 | 2541 | |
9ae110e2 | 2542 | /* There should never be a data URL. */ |
bc894455 | 2543 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 2544 | if (size < 0) { |
3dd05a85 DG |
2545 | ret = -LTTNG_ERR_INVALID; |
2546 | goto error; | |
07424f16 DG |
2547 | } |
2548 | ||
2549 | lsm.u.uri.size = size; | |
2550 | ||
4b35a6b3 | 2551 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
2552 | /* Don't append datetime if the name was automatically created. */ |
2553 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
2554 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
2555 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
2556 | name, datetime); | |
2557 | } else { | |
2558 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2559 | } | |
07424f16 DG |
2560 | if (ret < 0) { |
2561 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
2562 | ret = -LTTNG_ERR_FATAL; |
2563 | goto error; | |
07424f16 DG |
2564 | } |
2565 | } | |
2566 | ||
795a978d | 2567 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2568 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2569 | |
2570 | error: | |
2571 | free(uris); | |
2572 | return ret; | |
07424f16 DG |
2573 | } |
2574 | ||
806e2684 DG |
2575 | /* |
2576 | * For a given session name, this call checks if the data is ready to be read | |
2577 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2578 | * any readers. | |
2579 | */ | |
6d805429 | 2580 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2581 | { |
2582 | int ret; | |
2583 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2584 | uint8_t *pending = NULL; |
806e2684 DG |
2585 | |
2586 | if (session_name == NULL) { | |
2587 | return -LTTNG_ERR_INVALID; | |
2588 | } | |
2589 | ||
53efb85a | 2590 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2591 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2592 | |
cac3069d DG |
2593 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2594 | sizeof(lsm.session.name)); | |
806e2684 | 2595 | |
f6151c55 JG |
2596 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2597 | if (ret < 0) { | |
2598 | goto end; | |
2599 | } else if (ret != 1) { | |
2600 | /* Unexpected payload size */ | |
2601 | ret = -LTTNG_ERR_INVALID; | |
2602 | goto end; | |
806e2684 DG |
2603 | } |
2604 | ||
f6151c55 JG |
2605 | ret = (int) *pending; |
2606 | end: | |
2607 | free(pending); | |
806e2684 DG |
2608 | return ret; |
2609 | } | |
2610 | ||
27babd3a DG |
2611 | /* |
2612 | * Create a session exclusively used for snapshot. | |
2613 | * | |
2614 | * Returns LTTNG_OK on success or a negative error code. | |
2615 | */ | |
2616 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2617 | { | |
2618 | int ret; | |
2619 | ssize_t size; | |
2620 | struct lttcomm_session_msg lsm; | |
2621 | struct lttng_uri *uris = NULL; | |
2622 | ||
2623 | if (name == NULL) { | |
2624 | return -LTTNG_ERR_INVALID; | |
2625 | } | |
2626 | ||
2627 | memset(&lsm, 0, sizeof(lsm)); | |
2628 | ||
2629 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
2630 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2631 | ||
2632 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2633 | if (size < 0) { | |
2634 | return -LTTNG_ERR_INVALID; | |
2635 | } | |
2636 | ||
2637 | lsm.u.uri.size = size; | |
2638 | ||
10d65351 JD |
2639 | /* |
2640 | * If the user does not specify a custom subdir, use the session name. | |
2641 | */ | |
2642 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { | |
2643 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2644 | if (ret < 0) { | |
2645 | PERROR("snprintf uri subdir"); | |
2646 | ret = -LTTNG_ERR_FATAL; | |
2647 | goto error; | |
2648 | } | |
2649 | } | |
2650 | ||
795a978d | 2651 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
27babd3a DG |
2652 | sizeof(struct lttng_uri) * size, NULL); |
2653 | ||
10d65351 | 2654 | error: |
27babd3a DG |
2655 | free(uris); |
2656 | return ret; | |
2657 | } | |
2658 | ||
ecc48a90 JD |
2659 | /* |
2660 | * Create a session exclusively used for live. | |
2661 | * | |
2662 | * Returns LTTNG_OK on success or a negative error code. | |
2663 | */ | |
2664 | int lttng_create_session_live(const char *name, const char *url, | |
2665 | unsigned int timer_interval) | |
2666 | { | |
2667 | int ret; | |
2668 | ssize_t size; | |
2669 | struct lttcomm_session_msg lsm; | |
2670 | struct lttng_uri *uris = NULL; | |
2671 | ||
92805ee4 | 2672 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
2673 | return -LTTNG_ERR_INVALID; |
2674 | } | |
2675 | ||
2676 | memset(&lsm, 0, sizeof(lsm)); | |
2677 | ||
2678 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
2679 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2680 | ||
1a241656 DG |
2681 | if (url) { |
2682 | size = uri_parse_str_urls(url, NULL, &uris); | |
2683 | if (size <= 0) { | |
2684 | ret = -LTTNG_ERR_INVALID; | |
2685 | goto end; | |
2686 | } | |
ecc48a90 | 2687 | |
1a241656 DG |
2688 | /* file:// is not accepted for live session. */ |
2689 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
2690 | ret = -LTTNG_ERR_INVALID; | |
2691 | goto end; | |
2692 | } | |
2693 | } else { | |
2694 | size = 0; | |
ecc48a90 JD |
2695 | } |
2696 | ||
2697 | lsm.u.session_live.nb_uri = size; | |
2698 | lsm.u.session_live.timer_interval = timer_interval; | |
2699 | ||
795a978d | 2700 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
ecc48a90 JD |
2701 | sizeof(struct lttng_uri) * size, NULL); |
2702 | ||
2703 | end: | |
2704 | free(uris); | |
2705 | return ret; | |
2706 | } | |
2707 | ||
a5dfbb9d MD |
2708 | /* |
2709 | * List PIDs in the tracker. | |
2710 | * | |
1b18ce93 JG |
2711 | * enabled is set to whether the PID tracker is enabled. |
2712 | * pids is set to an allocated array of PIDs currently tracked. On | |
2713 | * success, pids must be freed by the caller. | |
2714 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2715 | * |
2716 | * Returns 0 on success, else a negative LTTng error code. | |
2717 | */ | |
2718 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2719 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2720 | { | |
ebbf5ab7 JR |
2721 | int ret; |
2722 | int enabled = 1; | |
a5dfbb9d MD |
2723 | struct lttcomm_session_msg lsm; |
2724 | size_t nr_pids; | |
ff75c11e | 2725 | int32_t *pids = NULL; |
a5dfbb9d MD |
2726 | |
2727 | if (handle == NULL) { | |
2728 | return -LTTNG_ERR_INVALID; | |
2729 | } | |
2730 | ||
2731 | memset(&lsm, 0, sizeof(lsm)); | |
2732 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2733 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2734 | sizeof(lsm.session.name)); | |
2735 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2736 | ||
2737 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2738 | if (ret < 0) { | |
2739 | return ret; | |
2740 | } | |
2741 | nr_pids = ret / sizeof(int32_t); | |
2742 | if (nr_pids == 1 && pids[0] == -1) { | |
2743 | free(pids); | |
2744 | pids = NULL; | |
2745 | enabled = 0; | |
2746 | nr_pids = 0; | |
2747 | } | |
2748 | *_enabled = enabled; | |
2749 | *_pids = pids; | |
2750 | *_nr_pids = nr_pids; | |
2751 | return 0; | |
2752 | } | |
2753 | ||
93ec662e JD |
2754 | /* |
2755 | * Regenerate the metadata for a session. | |
2756 | * Return 0 on success, a negative error code on error. | |
2757 | */ | |
eded6438 | 2758 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2759 | { |
2760 | int ret; | |
2761 | struct lttcomm_session_msg lsm; | |
2762 | ||
2763 | if (!session_name) { | |
2764 | ret = -LTTNG_ERR_INVALID; | |
2765 | goto end; | |
2766 | } | |
2767 | ||
2768 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2769 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2770 | |
2771 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2772 | sizeof(lsm.session.name)); | |
2773 | ||
2774 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2775 | if (ret < 0) { | |
2776 | goto end; | |
2777 | } | |
2778 | ||
2779 | ret = 0; | |
2780 | end: | |
2781 | return ret; | |
2782 | } | |
2783 | ||
eded6438 JD |
2784 | /* |
2785 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2786 | */ | |
2787 | int lttng_metadata_regenerate(const char *session_name) | |
2788 | { | |
2789 | return lttng_regenerate_metadata(session_name); | |
2790 | } | |
2791 | ||
c2561365 JD |
2792 | /* |
2793 | * Regenerate the statedump of a session. | |
2794 | * Return 0 on success, a negative error code on error. | |
2795 | */ | |
2796 | int lttng_regenerate_statedump(const char *session_name) | |
2797 | { | |
2798 | int ret; | |
2799 | struct lttcomm_session_msg lsm; | |
2800 | ||
2801 | if (!session_name) { | |
2802 | ret = -LTTNG_ERR_INVALID; | |
2803 | goto end; | |
2804 | } | |
2805 | ||
2806 | memset(&lsm, 0, sizeof(lsm)); | |
2807 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2808 | ||
2809 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2810 | sizeof(lsm.session.name)); | |
2811 | ||
2812 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2813 | if (ret < 0) { | |
2814 | goto end; | |
2815 | } | |
2816 | ||
2817 | ret = 0; | |
2818 | end: | |
2819 | return ret; | |
2820 | } | |
2821 | ||
a58c490f JG |
2822 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2823 | { | |
2824 | int ret; | |
2825 | struct lttcomm_session_msg lsm; | |
3647288f | 2826 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2827 | |
3647288f | 2828 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2829 | if (!trigger) { |
2830 | ret = -LTTNG_ERR_INVALID; | |
2831 | goto end; | |
2832 | } | |
2833 | ||
2834 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 2835 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2836 | goto end; |
2837 | } | |
2838 | ||
3647288f JG |
2839 | ret = lttng_trigger_serialize(trigger, &buffer); |
2840 | if (ret < 0) { | |
a58c490f JG |
2841 | ret = -LTTNG_ERR_UNK; |
2842 | goto end; | |
2843 | } | |
2844 | ||
a58c490f JG |
2845 | memset(&lsm, 0, sizeof(lsm)); |
2846 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
2847 | lsm.u.trigger.length = (uint32_t) buffer.size; |
2848 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
2849 | buffer.size, NULL); | |
a58c490f | 2850 | end: |
3647288f | 2851 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
2852 | return ret; |
2853 | } | |
2854 | ||
2855 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
2856 | { | |
2857 | int ret; | |
2858 | struct lttcomm_session_msg lsm; | |
3647288f | 2859 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2860 | |
3647288f | 2861 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2862 | if (!trigger) { |
2863 | ret = -LTTNG_ERR_INVALID; | |
2864 | goto end; | |
2865 | } | |
2866 | ||
2867 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 2868 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2869 | goto end; |
2870 | } | |
2871 | ||
3647288f JG |
2872 | ret = lttng_trigger_serialize(trigger, &buffer); |
2873 | if (ret < 0) { | |
a58c490f JG |
2874 | ret = -LTTNG_ERR_UNK; |
2875 | goto end; | |
2876 | } | |
2877 | ||
a58c490f JG |
2878 | memset(&lsm, 0, sizeof(lsm)); |
2879 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
2880 | lsm.u.trigger.length = (uint32_t) buffer.size; |
2881 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
2882 | buffer.size, NULL); | |
a58c490f | 2883 | end: |
3647288f | 2884 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
2885 | return ret; |
2886 | } | |
2887 | ||
d68c9a04 JD |
2888 | int lttng_session_get_current_archive_location(const char *session_name, |
2889 | char **chunk_path) | |
2890 | { | |
2891 | struct lttcomm_session_msg lsm; | |
2892 | struct lttng_session_get_current_output_return *output_return = NULL; | |
2893 | int ret; | |
2894 | size_t path_len; | |
2895 | ||
2896 | memset(&lsm, 0, sizeof(lsm)); | |
2897 | lsm.cmd_type = LTTNG_SESSION_GET_CURRENT_OUTPUT; | |
2898 | ret = lttng_strncpy(lsm.session.name, session_name, | |
2899 | sizeof(lsm.session.name)); | |
2900 | if (ret) { | |
2901 | ret = -LTTNG_ERR_INVALID; | |
2902 | goto end; | |
2903 | } | |
2904 | ||
2905 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &output_return); | |
2906 | if (ret < 0) { | |
2907 | ret = -1; | |
2908 | goto end; | |
2909 | } | |
2910 | ||
2911 | path_len = lttng_strnlen(output_return->path, | |
2912 | sizeof(output_return->path)); | |
2913 | if (path_len == 0 || path_len == sizeof(output_return->path)) { | |
2914 | ret = -LTTNG_ERR_NO_SESSION_OUTPUT; | |
2915 | goto end; | |
2916 | } | |
2917 | ||
2918 | *chunk_path = zmalloc(path_len + 1); | |
2919 | if (!*chunk_path) { | |
2920 | ret = -1; | |
2921 | goto end; | |
2922 | } | |
2923 | memcpy(*chunk_path, output_return->path, path_len); | |
2924 | ||
2925 | ret = 0; | |
2926 | ||
2927 | end: | |
2928 | free(output_return); | |
2929 | return ret; | |
2930 | } | |
2931 | ||
fac6795d | 2932 | /* |
9ae110e2 | 2933 | * lib constructor. |
fac6795d | 2934 | */ |
b2b89e8a | 2935 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
2936 | { |
2937 | /* Set default session group */ | |
bbccc3d2 | 2938 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2939 | } |
49cca668 DG |
2940 | |
2941 | /* | |
9ae110e2 | 2942 | * lib destructor. |
49cca668 | 2943 | */ |
b2b89e8a | 2944 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
2945 | { |
2946 | free(tracing_group); | |
2947 | } |