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; |
e9efbcd3 JG |
1036 | /* |
1037 | * Cast as non-const since we may replace the filter expression | |
1038 | * by a dynamically allocated string. Otherwise, the original | |
1039 | * string is not modified. | |
1040 | */ | |
1041 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1042 | |
1043 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1044 | ret = -LTTNG_ERR_INVALID; |
1045 | goto error; | |
93deb080 JI |
1046 | } |
1047 | ||
9ae110e2 JG |
1048 | /* |
1049 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1050 | * anyway, so treat this corner-case early to eliminate |
1051 | * lttng_fmemopen error for 0-byte allocation. | |
1052 | */ | |
1053 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1054 | ret = -LTTNG_ERR_INVALID; |
1055 | goto error; | |
93deb080 JI |
1056 | } |
1057 | ||
1058 | memset(&lsm, 0, sizeof(lsm)); | |
1059 | ||
1060 | /* If no channel name, send empty string. */ | |
1061 | if (channel_name == NULL) { | |
1062 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1063 | sizeof(lsm.u.enable.channel_name)); | |
1064 | } else { | |
1065 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1066 | sizeof(lsm.u.enable.channel_name)); | |
1067 | } | |
1068 | ||
18a720cd MD |
1069 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1070 | if (ev->name[0] == '\0') { | |
1071 | /* Enable all events */ | |
1072 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1073 | } |
93deb080 | 1074 | |
6565421f | 1075 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1076 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1077 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1078 | ||
1079 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1080 | sizeof(lsm.session.name)); | |
1081 | lsm.u.enable.exclusion_count = exclusion_count; | |
1082 | lsm.u.enable.bytecode_len = 0; | |
1083 | ||
93deb080 JI |
1084 | /* |
1085 | * We have either a filter or some exclusions, so we need to set up | |
9ae110e2 | 1086 | * a variable-length memory block from where to send the data. |
93deb080 | 1087 | */ |
15e37663 | 1088 | lttng_dynamic_buffer_init(&send_buffer); |
93deb080 | 1089 | |
9ae110e2 | 1090 | /* Parse filter expression. */ |
5cdb6027 | 1091 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1092 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1093 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1094 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1095 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1096 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1097 | char *agent_filter; | |
64226865 | 1098 | |
347c5ab5 | 1099 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1100 | agent_filter = set_agent_filter(filter_expression, ev); |
1101 | if (!agent_filter) { | |
137b9942 | 1102 | if (!filter_expression) { |
9ae110e2 JG |
1103 | /* |
1104 | * No JUL and no filter, just skip | |
1105 | * everything below. | |
1106 | */ | |
137b9942 DG |
1107 | goto ask_sessiond; |
1108 | } | |
64226865 DG |
1109 | } else { |
1110 | /* | |
9ae110e2 JG |
1111 | * With an agent filter, the original filter has |
1112 | * been added to it thus replace the filter | |
1113 | * expression. | |
64226865 | 1114 | */ |
0e115563 | 1115 | filter_expression = agent_filter; |
e9efbcd3 | 1116 | free_filter_expression = 1; |
9b21e6d5 | 1117 | } |
9b21e6d5 | 1118 | } |
93deb080 | 1119 | |
137b9942 | 1120 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1121 | if (ret) { |
137b9942 | 1122 | goto filter_error; |
93deb080 | 1123 | } |
6b453b5e JG |
1124 | } |
1125 | ||
15e37663 JG |
1126 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1127 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1128 | + lsm.u.enable.expression_len |
1129 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1130 | if (ret) { |
6b453b5e | 1131 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1132 | goto mem_error; |
6b453b5e | 1133 | } |
137b9942 | 1134 | |
9ae110e2 | 1135 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1136 | for (i = 0; i < exclusion_count; i++) { |
1137 | size_t exclusion_len; | |
1138 | ||
1139 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1140 | LTTNG_SYMBOL_NAME_LEN); | |
1141 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1142 | /* Exclusion is not NULL-terminated. */ | |
1143 | ret = -LTTNG_ERR_INVALID; | |
1144 | goto mem_error; | |
1145 | } | |
1146 | ||
1147 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1148 | *(exclusion_list + i), | |
1149 | LTTNG_SYMBOL_NAME_LEN); | |
1150 | if (ret) { | |
1151 | goto mem_error; | |
1152 | } | |
6b453b5e | 1153 | } |
15e37663 | 1154 | |
9ae110e2 | 1155 | /* Add filter expression next. */ |
15e37663 JG |
1156 | if (filter_expression) { |
1157 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1158 | filter_expression, lsm.u.enable.expression_len); | |
1159 | if (ret) { | |
1160 | goto mem_error; | |
1161 | } | |
6b453b5e | 1162 | } |
9ae110e2 | 1163 | /* Add filter bytecode next. */ |
137b9942 | 1164 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1165 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1166 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1167 | if (ret) { | |
1168 | goto mem_error; | |
1169 | } | |
1170 | } | |
1171 | if (ev->extended.ptr) { | |
1172 | struct lttng_event_extended *ev_ext = | |
1173 | (struct lttng_event_extended *) ev->extended.ptr; | |
1174 | ||
1175 | if (ev_ext->probe_location) { | |
1176 | /* | |
1177 | * lttng_userspace_probe_location_serialize returns the | |
1178 | * number of bytes that was appended to the buffer. | |
1179 | */ | |
1180 | ret = lttng_userspace_probe_location_serialize( | |
1181 | ev_ext->probe_location, &send_buffer, | |
1182 | &fd_to_send); | |
56f0bc67 | 1183 | if (ret < 0) { |
15e37663 JG |
1184 | goto mem_error; |
1185 | } | |
1186 | ||
1187 | send_fd = fd_to_send >= 0; | |
1188 | /* | |
1189 | * Set the size of the userspace probe location element | |
1190 | * of the buffer so that the receiving side knows where | |
1191 | * to split it. | |
1192 | */ | |
1193 | lsm.u.enable.userspace_probe_location_len = ret; | |
1194 | } | |
93deb080 JI |
1195 | } |
1196 | ||
15e37663 JG |
1197 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1198 | send_fd ? &fd_to_send : NULL, | |
1199 | send_fd ? 1 : 0, | |
1200 | send_buffer.size ? send_buffer.data : NULL, | |
1201 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1202 | |
7ca1dc6f DG |
1203 | mem_error: |
1204 | if (filter_expression && ctx) { | |
93deb080 JI |
1205 | filter_bytecode_free(ctx); |
1206 | filter_ir_free(ctx); | |
1207 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1208 | } |
1209 | filter_error: | |
1210 | if (free_filter_expression) { | |
1211 | /* | |
9ae110e2 JG |
1212 | * The filter expression has been replaced and must be freed as |
1213 | * it is not the original filter expression received as a | |
1214 | * parameter. | |
7ca1dc6f DG |
1215 | */ |
1216 | free(filter_expression); | |
93deb080 | 1217 | } |
137b9942 DG |
1218 | error: |
1219 | /* | |
9ae110e2 JG |
1220 | * Return directly to the caller and don't ask the sessiond since |
1221 | * something went wrong in the parsing of data above. | |
137b9942 | 1222 | */ |
15e37663 | 1223 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1224 | return ret; |
3e1c9ff7 DG |
1225 | |
1226 | ask_sessiond: | |
1227 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1228 | return ret; | |
93deb080 JI |
1229 | } |
1230 | ||
6e911cad MD |
1231 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1232 | struct lttng_event *ev, const char *channel_name, | |
1233 | const char *original_filter_expression) | |
1df4dedd | 1234 | { |
cd80958d | 1235 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1236 | char *varlen_data; |
1237 | int ret = 0; | |
1238 | unsigned int free_filter_expression = 0; | |
1239 | struct filter_parser_ctx *ctx = NULL; | |
1240 | /* | |
1241 | * Cast as non-const since we may replace the filter expression | |
1242 | * by a dynamically allocated string. Otherwise, the original | |
1243 | * string is not modified. | |
1244 | */ | |
1245 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1246 | |
6e911cad MD |
1247 | if (handle == NULL || ev == NULL) { |
1248 | ret = -LTTNG_ERR_INVALID; | |
1249 | goto error; | |
1250 | } | |
1251 | ||
9ae110e2 JG |
1252 | /* |
1253 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1254 | * anyway, so treat this corner-case early to eliminate |
1255 | * lttng_fmemopen error for 0-byte allocation. | |
1256 | */ | |
1257 | if (filter_expression && filter_expression[0] == '\0') { | |
1258 | ret = -LTTNG_ERR_INVALID; | |
1259 | goto error; | |
cd80958d DG |
1260 | } |
1261 | ||
441c16a7 MD |
1262 | memset(&lsm, 0, sizeof(lsm)); |
1263 | ||
85076754 MD |
1264 | /* If no channel name, send empty string. */ |
1265 | if (channel_name == NULL) { | |
1266 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1267 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1268 | } else { |
85076754 | 1269 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1270 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1271 | } |
1272 | ||
18a720cd | 1273 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1274 | |
6e911cad MD |
1275 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1276 | /* FIXME: copying non-packed struct to packed struct. */ | |
1277 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1278 | ||
cac3069d | 1279 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1280 | sizeof(lsm.session.name)); |
6e911cad | 1281 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1282 | |
6e911cad MD |
1283 | /* |
1284 | * For the JUL domain, a filter is enforced except for the | |
1285 | * disable all event. This is done to avoid having the event in | |
1286 | * all sessions thus filtering by logger name. | |
1287 | */ | |
1288 | if (filter_expression == NULL && | |
1289 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1290 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1291 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1292 | goto ask_sessiond; |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * We have a filter, so we need to set up a variable-length | |
1297 | * memory block from where to send the data. | |
1298 | */ | |
1299 | ||
1300 | /* Parse filter expression */ | |
1301 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1302 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1303 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1304 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1305 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1306 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1307 | char *agent_filter; | |
6e911cad MD |
1308 | |
1309 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1310 | agent_filter = set_agent_filter(filter_expression, ev); |
1311 | if (!agent_filter) { | |
6e911cad | 1312 | if (!filter_expression) { |
9ae110e2 JG |
1313 | /* |
1314 | * No JUL and no filter, just skip | |
1315 | * everything below. | |
1316 | */ | |
6e911cad MD |
1317 | goto ask_sessiond; |
1318 | } | |
1319 | } else { | |
1320 | /* | |
9ae110e2 JG |
1321 | * With a JUL filter, the original filter has |
1322 | * been added to it thus replace the filter | |
1323 | * expression. | |
6e911cad | 1324 | */ |
0e115563 | 1325 | filter_expression = agent_filter; |
6e911cad MD |
1326 | free_filter_expression = 1; |
1327 | } | |
1328 | } | |
1329 | ||
1330 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1331 | if (ret) { | |
1332 | goto filter_error; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1337 | + lsm.u.disable.expression_len); | |
1338 | if (!varlen_data) { | |
1339 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1340 | goto mem_error; | |
1341 | } | |
1342 | ||
9ae110e2 | 1343 | /* Add filter expression. */ |
6e911cad MD |
1344 | if (lsm.u.disable.expression_len != 0) { |
1345 | memcpy(varlen_data, | |
1346 | filter_expression, | |
1347 | lsm.u.disable.expression_len); | |
1348 | } | |
9ae110e2 | 1349 | /* Add filter bytecode next. */ |
6e911cad MD |
1350 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1351 | memcpy(varlen_data | |
1352 | + lsm.u.disable.expression_len, | |
1353 | &ctx->bytecode->b, | |
1354 | lsm.u.disable.bytecode_len); | |
1355 | } | |
1356 | ||
795a978d | 1357 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1358 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1359 | free(varlen_data); | |
1360 | ||
1361 | mem_error: | |
1362 | if (filter_expression && ctx) { | |
1363 | filter_bytecode_free(ctx); | |
1364 | filter_ir_free(ctx); | |
1365 | filter_parser_ctx_free(ctx); | |
1366 | } | |
1367 | filter_error: | |
1368 | if (free_filter_expression) { | |
1369 | /* | |
9ae110e2 JG |
1370 | * The filter expression has been replaced and must be freed as |
1371 | * it is not the original filter expression received as a | |
1372 | * parameter. | |
6e911cad MD |
1373 | */ |
1374 | free(filter_expression); | |
1375 | } | |
1376 | error: | |
1377 | /* | |
9ae110e2 JG |
1378 | * Return directly to the caller and don't ask the sessiond since |
1379 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1380 | */ |
1381 | return ret; | |
1382 | ||
1383 | ask_sessiond: | |
1384 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1385 | return ret; | |
1386 | } | |
1387 | ||
1388 | /* | |
9ae110e2 JG |
1389 | * Disable event(s) of a channel and domain. |
1390 | * If no event name is specified, all events are disabled. | |
1391 | * If no channel name is specified, the default 'channel0' is used. | |
1392 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1393 | */ |
1394 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1395 | const char *channel_name) | |
1396 | { | |
1397 | struct lttng_event ev; | |
1398 | ||
1399 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1400 | ev.loglevel = -1; |
6e911cad MD |
1401 | ev.type = LTTNG_EVENT_ALL; |
1402 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1403 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1404 | } |
1405 | ||
cf0bcb51 JG |
1406 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1407 | { | |
1408 | struct lttng_channel *channel = NULL; | |
1409 | struct lttng_channel_extended *extended = NULL; | |
1410 | ||
1411 | if (!domain) { | |
1412 | goto error; | |
1413 | } | |
1414 | ||
1415 | /* Validate domain. */ | |
1416 | switch (domain->type) { | |
1417 | case LTTNG_DOMAIN_UST: | |
1418 | switch (domain->buf_type) { | |
1419 | case LTTNG_BUFFER_PER_UID: | |
1420 | case LTTNG_BUFFER_PER_PID: | |
1421 | break; | |
1422 | default: | |
1423 | goto error; | |
1424 | } | |
1425 | break; | |
1426 | case LTTNG_DOMAIN_KERNEL: | |
1427 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1428 | goto error; | |
1429 | } | |
1430 | break; | |
1431 | default: | |
1432 | goto error; | |
1433 | } | |
1434 | ||
1435 | channel = zmalloc(sizeof(*channel)); | |
1436 | if (!channel) { | |
1437 | goto error; | |
1438 | } | |
1439 | ||
1440 | extended = zmalloc(sizeof(*extended)); | |
1441 | if (!extended) { | |
1442 | goto error; | |
1443 | } | |
1444 | ||
1445 | channel->attr.extended.ptr = extended; | |
1446 | ||
1447 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1448 | return channel; | |
1449 | error: | |
1450 | free(channel); | |
1451 | free(extended); | |
1452 | return NULL; | |
1453 | } | |
1454 | ||
1455 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1456 | { | |
1457 | if (!channel) { | |
1458 | return; | |
1459 | } | |
1460 | ||
1461 | if (channel->attr.extended.ptr) { | |
1462 | free(channel->attr.extended.ptr); | |
1463 | } | |
1464 | free(channel); | |
1465 | } | |
1466 | ||
1df4dedd | 1467 | /* |
9ae110e2 JG |
1468 | * Enable channel per domain |
1469 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1470 | */ |
cd80958d | 1471 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1472 | struct lttng_channel *in_chan) |
a5c5a2bd | 1473 | { |
cd80958d DG |
1474 | struct lttcomm_session_msg lsm; |
1475 | ||
9ae110e2 | 1476 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1477 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1478 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1479 | } |
1480 | ||
441c16a7 | 1481 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1482 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1483 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1484 | |
cf0bcb51 JG |
1485 | if (!in_chan->attr.extended.ptr) { |
1486 | struct lttng_channel *channel; | |
1487 | struct lttng_channel_extended *extended; | |
7d29a247 | 1488 | |
cf0bcb51 JG |
1489 | channel = lttng_channel_create(&handle->domain); |
1490 | if (!channel) { | |
1491 | return -LTTNG_ERR_NOMEM; | |
1492 | } | |
1493 | ||
1494 | /* | |
1495 | * Create a new channel in order to use default extended | |
1496 | * attribute values. | |
1497 | */ | |
1498 | extended = (struct lttng_channel_extended *) | |
1499 | channel->attr.extended.ptr; | |
1500 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1501 | lttng_channel_destroy(channel); | |
1502 | } else { | |
1503 | struct lttng_channel_extended *extended; | |
1504 | ||
1505 | extended = (struct lttng_channel_extended *) | |
1506 | in_chan->attr.extended.ptr; | |
1507 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1508 | } | |
cd80958d | 1509 | |
cf0bcb51 | 1510 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
cac3069d | 1511 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1512 | |
cac3069d | 1513 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1514 | sizeof(lsm.session.name)); |
1515 | ||
cac3069d | 1516 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1517 | } |
1df4dedd | 1518 | |
2ef84c95 | 1519 | /* |
9ae110e2 JG |
1520 | * All tracing will be stopped for registered events of the channel. |
1521 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1522 | */ |
cd80958d | 1523 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1524 | { |
cd80958d DG |
1525 | struct lttcomm_session_msg lsm; |
1526 | ||
9ae110e2 | 1527 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1528 | if (handle == NULL || name == NULL) { |
2f70b271 | 1529 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1530 | } |
1531 | ||
441c16a7 MD |
1532 | memset(&lsm, 0, sizeof(lsm)); |
1533 | ||
cd80958d | 1534 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1535 | |
cac3069d | 1536 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1537 | sizeof(lsm.u.disable.channel_name)); |
1538 | ||
cac3069d | 1539 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1540 | |
cac3069d | 1541 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1542 | sizeof(lsm.session.name)); |
1543 | ||
cac3069d | 1544 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1545 | } |
1546 | ||
ccf10263 | 1547 | /* |
9ae110e2 JG |
1548 | * Add PID to session tracker. |
1549 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1550 | */ |
1551 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1552 | { | |
1553 | struct lttcomm_session_msg lsm; | |
1554 | ||
9ae110e2 | 1555 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1556 | if (handle == NULL) { |
1557 | return -LTTNG_ERR_INVALID; | |
1558 | } | |
1559 | ||
1560 | memset(&lsm, 0, sizeof(lsm)); | |
1561 | ||
1562 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1563 | lsm.u.pid_tracker.pid = pid; | |
1564 | ||
1565 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1566 | ||
1567 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1568 | sizeof(lsm.session.name)); | |
1569 | ||
1570 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1571 | } | |
1572 | ||
1573 | /* | |
9ae110e2 JG |
1574 | * Remove PID from session tracker. |
1575 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1576 | */ |
1577 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1578 | { | |
1579 | struct lttcomm_session_msg lsm; | |
1580 | ||
9ae110e2 | 1581 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1582 | if (handle == NULL) { |
1583 | return -LTTNG_ERR_INVALID; | |
1584 | } | |
1585 | ||
1586 | memset(&lsm, 0, sizeof(lsm)); | |
1587 | ||
1588 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1589 | lsm.u.pid_tracker.pid = pid; | |
1590 | ||
1591 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1592 | ||
1593 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1594 | sizeof(lsm.session.name)); | |
1595 | ||
1596 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1597 | } | |
1598 | ||
fac6795d | 1599 | /* |
9ae110e2 JG |
1600 | * Lists all available tracepoints of domain. |
1601 | * Sets the contents of the events array. | |
1602 | * Returns the number of lttng_event entries in events; | |
1603 | * on error, returns a negative value. | |
fac6795d | 1604 | */ |
cd80958d | 1605 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1606 | struct lttng_event **events) |
fac6795d | 1607 | { |
052da939 | 1608 | int ret; |
cd80958d DG |
1609 | struct lttcomm_session_msg lsm; |
1610 | ||
9d697d3d | 1611 | if (handle == NULL) { |
2f70b271 | 1612 | return -LTTNG_ERR_INVALID; |
cd80958d | 1613 | } |
fac6795d | 1614 | |
53efb85a | 1615 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1616 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1617 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1618 | |
cac3069d | 1619 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1620 | if (ret < 0) { |
1621 | return ret; | |
eb354453 | 1622 | } |
fac6795d | 1623 | |
9f19cc17 | 1624 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1625 | } |
1626 | ||
f37d259d | 1627 | /* |
9ae110e2 JG |
1628 | * Lists all available tracepoint fields of domain. |
1629 | * Sets the contents of the event field array. | |
1630 | * Returns the number of lttng_event_field entries in events; | |
1631 | * on error, returns a negative value. | |
f37d259d MD |
1632 | */ |
1633 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1634 | struct lttng_event_field **fields) | |
1635 | { | |
1636 | int ret; | |
1637 | struct lttcomm_session_msg lsm; | |
1638 | ||
1639 | if (handle == NULL) { | |
2f70b271 | 1640 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1641 | } |
1642 | ||
53efb85a | 1643 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1644 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1645 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1646 | |
cac3069d | 1647 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1648 | if (ret < 0) { |
1649 | return ret; | |
1650 | } | |
1651 | ||
1652 | return ret / sizeof(struct lttng_event_field); | |
1653 | } | |
1654 | ||
834978fd | 1655 | /* |
9ae110e2 JG |
1656 | * Lists all available kernel system calls. Allocates and sets the contents of |
1657 | * the events array. | |
834978fd | 1658 | * |
9ae110e2 JG |
1659 | * Returns the number of lttng_event entries in events; on error, returns a |
1660 | * negative value. | |
834978fd DG |
1661 | */ |
1662 | int lttng_list_syscalls(struct lttng_event **events) | |
1663 | { | |
1664 | int ret; | |
1665 | struct lttcomm_session_msg lsm; | |
1666 | ||
1667 | if (!events) { | |
1668 | return -LTTNG_ERR_INVALID; | |
1669 | } | |
1670 | ||
1671 | memset(&lsm, 0, sizeof(lsm)); | |
1672 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1673 | /* Force kernel domain for system calls. */ | |
1674 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1675 | ||
1676 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1677 | if (ret < 0) { | |
1678 | return ret; | |
1679 | } | |
1680 | ||
1681 | return ret / sizeof(struct lttng_event); | |
1682 | } | |
1683 | ||
1657e9bb | 1684 | /* |
9ae110e2 JG |
1685 | * Returns a human readable string describing |
1686 | * the error code (a negative value). | |
1657e9bb | 1687 | */ |
9a745bc7 | 1688 | const char *lttng_strerror(int code) |
1657e9bb | 1689 | { |
f73fabfd | 1690 | return error_get_str(code); |
1657e9bb DG |
1691 | } |
1692 | ||
aaf97519 | 1693 | /* |
a4b92340 DG |
1694 | * Create a brand new session using name and url for destination. |
1695 | * | |
f73fabfd | 1696 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1697 | */ |
a4b92340 | 1698 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1699 | { |
3dd05a85 | 1700 | int ret; |
a4b92340 | 1701 | ssize_t size; |
00e2e675 | 1702 | struct lttcomm_session_msg lsm; |
a4b92340 | 1703 | struct lttng_uri *uris = NULL; |
00e2e675 | 1704 | |
a4b92340 | 1705 | if (name == NULL) { |
2f70b271 | 1706 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1707 | } |
1708 | ||
a4b92340 | 1709 | memset(&lsm, 0, sizeof(lsm)); |
00e2e675 | 1710 | |
a4b92340 | 1711 | lsm.cmd_type = LTTNG_CREATE_SESSION; |
cac3069d | 1712 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
a4b92340 DG |
1713 | |
1714 | /* There should never be a data URL */ | |
bc894455 | 1715 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1716 | if (size < 0) { |
2f70b271 | 1717 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
1718 | } |
1719 | ||
a4b92340 DG |
1720 | lsm.u.uri.size = size; |
1721 | ||
795a978d | 1722 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 1723 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
1724 | |
1725 | free(uris); | |
1726 | return ret; | |
00e2e675 DG |
1727 | } |
1728 | ||
8028d920 | 1729 | /* |
9ae110e2 JG |
1730 | * Destroy session using name. |
1731 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1732 | */ |
8fd2c92c | 1733 | static |
e20ee7c2 | 1734 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 1735 | { |
cd80958d DG |
1736 | struct lttcomm_session_msg lsm; |
1737 | ||
843f5df9 | 1738 | if (session_name == NULL) { |
2f70b271 | 1739 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1740 | } |
1741 | ||
53efb85a | 1742 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1743 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 1744 | |
cac3069d DG |
1745 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1746 | sizeof(lsm.session.name)); | |
cd80958d | 1747 | |
cac3069d | 1748 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
1749 | } |
1750 | ||
e20ee7c2 JD |
1751 | /* |
1752 | * Stop the session and wait for the data before destroying it | |
1753 | */ | |
1754 | int lttng_destroy_session(const char *session_name) | |
1755 | { | |
1756 | int ret; | |
1757 | ||
1758 | /* | |
1759 | * Stop the tracing and wait for the data. | |
1760 | */ | |
1761 | ret = _lttng_stop_tracing(session_name, 1); | |
1762 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1763 | goto end; | |
1764 | } | |
1765 | ||
1766 | ret = _lttng_destroy_session(session_name); | |
1767 | end: | |
1768 | return ret; | |
1769 | } | |
1770 | ||
1771 | /* | |
1772 | * Destroy the session without waiting for the data. | |
1773 | */ | |
1774 | int lttng_destroy_session_no_wait(const char *session_name) | |
1775 | { | |
1776 | int ret; | |
1777 | ||
1778 | /* | |
1779 | * Stop the tracing without waiting for the data. | |
1780 | * The session might already have been stopped, so just | |
1781 | * skip this error. | |
1782 | */ | |
1783 | ret = _lttng_stop_tracing(session_name, 0); | |
1784 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1785 | goto end; | |
1786 | } | |
1787 | ||
1788 | ret = _lttng_destroy_session(session_name); | |
1789 | end: | |
1790 | return ret; | |
1791 | } | |
1792 | ||
57167058 | 1793 | /* |
9ae110e2 JG |
1794 | * Ask the session daemon for all available sessions. |
1795 | * Sets the contents of the sessions array. | |
1796 | * Returns the number of lttng_session entries in sessions; | |
1797 | * on error, returns a negative value. | |
57167058 | 1798 | */ |
ca95a216 | 1799 | int lttng_list_sessions(struct lttng_session **sessions) |
57167058 | 1800 | { |
ca95a216 | 1801 | int ret; |
cd80958d | 1802 | struct lttcomm_session_msg lsm; |
57167058 | 1803 | |
53efb85a | 1804 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1805 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
cac3069d | 1806 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions); |
57167058 | 1807 | if (ret < 0) { |
ca95a216 | 1808 | return ret; |
57167058 DG |
1809 | } |
1810 | ||
ca95a216 | 1811 | return ret / sizeof(struct lttng_session); |
57167058 DG |
1812 | } |
1813 | ||
d7ba1388 MD |
1814 | int lttng_set_session_shm_path(const char *session_name, |
1815 | const char *shm_path) | |
1816 | { | |
1817 | struct lttcomm_session_msg lsm; | |
1818 | ||
1819 | if (session_name == NULL) { | |
1820 | return -LTTNG_ERR_INVALID; | |
1821 | } | |
1822 | ||
1823 | memset(&lsm, 0, sizeof(lsm)); | |
1824 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
1825 | ||
1826 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
1827 | sizeof(lsm.session.name)); | |
1828 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
1829 | sizeof(lsm.u.set_shm_path.shm_path)); | |
1830 | ||
1831 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1832 | } | |
1833 | ||
9f19cc17 | 1834 | /* |
9ae110e2 JG |
1835 | * Ask the session daemon for all available domains of a session. |
1836 | * Sets the contents of the domains array. | |
1837 | * Returns the number of lttng_domain entries in domains; | |
1838 | * on error, returns a negative value. | |
9f19cc17 | 1839 | */ |
330be774 | 1840 | int lttng_list_domains(const char *session_name, |
cd80958d | 1841 | struct lttng_domain **domains) |
9f19cc17 DG |
1842 | { |
1843 | int ret; | |
cd80958d DG |
1844 | struct lttcomm_session_msg lsm; |
1845 | ||
330be774 | 1846 | if (session_name == NULL) { |
2f70b271 | 1847 | return -LTTNG_ERR_INVALID; |
cd80958d | 1848 | } |
9f19cc17 | 1849 | |
53efb85a | 1850 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
1851 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
1852 | ||
cac3069d DG |
1853 | lttng_ctl_copy_string(lsm.session.name, session_name, |
1854 | sizeof(lsm.session.name)); | |
cd80958d | 1855 | |
cac3069d | 1856 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
1857 | if (ret < 0) { |
1858 | return ret; | |
1859 | } | |
1860 | ||
1861 | return ret / sizeof(struct lttng_domain); | |
1862 | } | |
1863 | ||
1864 | /* | |
9ae110e2 JG |
1865 | * Ask the session daemon for all available channels of a session. |
1866 | * Sets the contents of the channels array. | |
1867 | * Returns the number of lttng_channel entries in channels; | |
1868 | * on error, returns a negative value. | |
9f19cc17 | 1869 | */ |
cd80958d DG |
1870 | int lttng_list_channels(struct lttng_handle *handle, |
1871 | struct lttng_channel **channels) | |
9f19cc17 DG |
1872 | { |
1873 | int ret; | |
53e367f9 JG |
1874 | size_t channel_count, i; |
1875 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 1876 | sizeof(struct lttng_channel_extended); |
cd80958d | 1877 | struct lttcomm_session_msg lsm; |
53e367f9 | 1878 | void *extended_at; |
cd80958d | 1879 | |
9d697d3d | 1880 | if (handle == NULL) { |
53e367f9 JG |
1881 | ret = -LTTNG_ERR_INVALID; |
1882 | goto end; | |
cd80958d DG |
1883 | } |
1884 | ||
53efb85a | 1885 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1886 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 1887 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1888 | sizeof(lsm.session.name)); |
9f19cc17 | 1889 | |
cac3069d | 1890 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1891 | |
cac3069d | 1892 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 1893 | if (ret < 0) { |
53e367f9 JG |
1894 | goto end; |
1895 | } | |
1896 | ||
1897 | if (ret % channel_size) { | |
1898 | ret = -LTTNG_ERR_UNK; | |
1899 | free(*channels); | |
1900 | *channels = NULL; | |
1901 | goto end; | |
9f19cc17 | 1902 | } |
53e367f9 | 1903 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 1904 | |
53e367f9 JG |
1905 | /* Set extended info pointers */ |
1906 | extended_at = ((void *) *channels) + | |
1907 | channel_count * sizeof(struct lttng_channel); | |
1908 | for (i = 0; i < channel_count; i++) { | |
1909 | struct lttng_channel *chan = &(*channels)[i]; | |
1910 | ||
1911 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 1912 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
1913 | } |
1914 | ||
1915 | ret = (int) channel_count; | |
1916 | end: | |
1917 | return ret; | |
9f19cc17 DG |
1918 | } |
1919 | ||
1920 | /* | |
9ae110e2 JG |
1921 | * Ask the session daemon for all available events of a session channel. |
1922 | * Sets the contents of the events array. | |
1923 | * Returns the number of lttng_event entries in events; | |
1924 | * on error, returns a negative value. | |
9f19cc17 | 1925 | */ |
cd80958d DG |
1926 | int lttng_list_events(struct lttng_handle *handle, |
1927 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
1928 | { |
1929 | int ret; | |
cd80958d | 1930 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
1931 | struct lttcomm_event_command_header *cmd_header = NULL; |
1932 | size_t cmd_header_len; | |
1933 | uint32_t nb_events, i; | |
de453daa | 1934 | void *comm_ext_at; |
de453daa | 1935 | char *reception_buffer = NULL; |
56f0bc67 | 1936 | struct lttng_dynamic_buffer listing; |
de453daa | 1937 | size_t storage_req; |
9f19cc17 | 1938 | |
9d697d3d DG |
1939 | /* Safety check. An handle and channel name are mandatory */ |
1940 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 1941 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1942 | } |
1943 | ||
53efb85a | 1944 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1945 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 1946 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1947 | sizeof(lsm.session.name)); |
cac3069d | 1948 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 1949 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 1950 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 1951 | |
a04d53fc | 1952 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
1953 | (void **) &reception_buffer, (void **) &cmd_header, |
1954 | &cmd_header_len); | |
9f19cc17 | 1955 | if (ret < 0) { |
de453daa | 1956 | goto end; |
9f19cc17 DG |
1957 | } |
1958 | ||
b4e3ceb9 PP |
1959 | /* Set number of events and free command header */ |
1960 | nb_events = cmd_header->nb_events; | |
1961 | if (nb_events > INT_MAX) { | |
1962 | ret = -EOVERFLOW; | |
de453daa | 1963 | goto end; |
b4e3ceb9 | 1964 | } |
b4e3ceb9 PP |
1965 | free(cmd_header); |
1966 | cmd_header = NULL; | |
1967 | ||
de453daa JG |
1968 | /* |
1969 | * The buffer that is returned must contain a "flat" version of | |
1970 | * the events that are returned. In other words, all pointers | |
1971 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
1972 | * buffer so that the user may free everything by simply calling free() |
1973 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
1974 | * compatibility. |
1975 | * | |
56f0bc67 JG |
1976 | * A first pass is performed to compute the size of the buffer that |
1977 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
1978 | * the returned events so that their members always point within the |
1979 | * buffer. | |
1980 | * | |
1981 | * The layout of the returned buffer is as follows: | |
1982 | * - struct lttng_event[nb_events], | |
1983 | * - nb_events times the following: | |
1984 | * - struct lttng_event_extended, | |
1985 | * - flattened version of userspace_probe_location | |
1986 | * - filter_expression | |
1987 | * - exclusions | |
1988 | * - padding to align to 64-bits | |
1989 | */ | |
1990 | comm_ext_at = reception_buffer + | |
1991 | (nb_events * sizeof(struct lttng_event)); | |
1992 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
1993 | |
1994 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
1995 | struct lttcomm_event_extended_header *ext_comm = |
1996 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 1997 | int probe_storage_req = 0; |
b4e3ceb9 | 1998 | |
de453daa JG |
1999 | comm_ext_at += sizeof(*ext_comm); |
2000 | comm_ext_at += ext_comm->filter_len; | |
2001 | comm_ext_at += | |
2002 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2003 | ||
56f0bc67 JG |
2004 | if (ext_comm->userspace_probe_location_len) { |
2005 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2006 | struct lttng_buffer_view probe_location_view; | |
2007 | ||
2008 | probe_location_view = lttng_buffer_view_init( | |
2009 | comm_ext_at, 0, | |
2010 | ext_comm->userspace_probe_location_len); | |
2011 | ||
2012 | /* | |
2013 | * Create a temporary userspace probe location to | |
2014 | * determine the size needed by a "flattened" version | |
2015 | * of that same probe location. | |
2016 | */ | |
2017 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2018 | &probe_location_view, &probe_location); | |
2019 | if (ret < 0) { | |
2020 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2021 | goto end; | |
2022 | } | |
2023 | ||
2024 | ret = lttng_userspace_probe_location_flatten( | |
2025 | probe_location, NULL); | |
2026 | lttng_userspace_probe_location_destroy(probe_location); | |
2027 | if (ret < 0) { | |
2028 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2029 | goto end; | |
2030 | } | |
2031 | ||
2032 | probe_storage_req = ret; | |
2033 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2034 | ret = 0; | |
2035 | } | |
2036 | ||
de453daa | 2037 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2038 | storage_req += ext_comm->filter_len; |
2039 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2040 | /* Padding to ensure the flat probe is aligned. */ |
2041 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2042 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2043 | } |
2044 | ||
56f0bc67 JG |
2045 | lttng_dynamic_buffer_init(&listing); |
2046 | /* | |
2047 | * We must ensure that "listing" is never resized so as to preserve | |
2048 | * the validity of the flattened objects. | |
2049 | */ | |
2050 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2051 | if (ret) { | |
2052 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2053 | goto end; |
2054 | } | |
56f0bc67 JG |
2055 | |
2056 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2057 | nb_events * sizeof(struct lttng_event)); | |
2058 | if (ret) { | |
2059 | ret = -LTTNG_ERR_NOMEM; | |
2060 | goto free_dynamic_buffer; | |
2061 | } | |
de453daa JG |
2062 | |
2063 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2064 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2065 | for (i = 0; i < nb_events; i++) { |
2066 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2067 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2068 | struct lttcomm_event_extended_header *ext_comm = |
2069 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2070 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2071 | (struct lttng_event_extended *) |
2072 | (listing.data + listing.size); | |
de453daa | 2073 | |
56f0bc67 JG |
2074 | /* Insert struct lttng_event_extended. */ |
2075 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2076 | listing.size + sizeof(*event_extended)); | |
2077 | if (ret) { | |
2078 | ret = -LTTNG_ERR_NOMEM; | |
2079 | goto free_dynamic_buffer; | |
2080 | } | |
de453daa | 2081 | event->extended.ptr = event_extended; |
56f0bc67 | 2082 | |
de453daa JG |
2083 | comm_ext_at += sizeof(*ext_comm); |
2084 | ||
56f0bc67 JG |
2085 | /* Insert filter expression. */ |
2086 | if (ext_comm->filter_len) { | |
2087 | event_extended->filter_expression = listing.data + | |
2088 | listing.size; | |
2089 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2090 | ext_comm->filter_len); | |
2091 | if (ret) { | |
2092 | ret = -LTTNG_ERR_NOMEM; | |
2093 | goto free_dynamic_buffer; | |
2094 | } | |
2095 | comm_ext_at += ext_comm->filter_len; | |
2096 | } | |
2097 | ||
2098 | /* Insert exclusions. */ | |
2099 | if (ext_comm->nb_exclusions) { | |
2100 | event_extended->exclusions.count = | |
2101 | ext_comm->nb_exclusions; | |
2102 | event_extended->exclusions.strings = | |
2103 | listing.data + listing.size; | |
2104 | ||
2105 | ret = lttng_dynamic_buffer_append(&listing, | |
2106 | comm_ext_at, | |
2107 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2108 | if (ret) { | |
2109 | ret = -LTTNG_ERR_NOMEM; | |
2110 | } | |
2111 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2112 | } | |
2113 | ||
2114 | /* Insert padding to align to 64-bits. */ | |
2115 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2116 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2117 | if (ret) { | |
2118 | ret = -LTTNG_ERR_NOMEM; | |
2119 | goto free_dynamic_buffer; | |
2120 | } | |
2121 | ||
2122 | /* Insert flattened userspace probe location. */ | |
2123 | if (ext_comm->userspace_probe_location_len) { | |
2124 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2125 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2126 | |
56f0bc67 JG |
2127 | probe_location_view = lttng_buffer_view_init( |
2128 | comm_ext_at, 0, | |
2129 | ext_comm->userspace_probe_location_len); | |
de453daa | 2130 | |
56f0bc67 JG |
2131 | ret = lttng_userspace_probe_location_create_from_buffer( |
2132 | &probe_location_view, &probe_location); | |
2133 | if (ret < 0) { | |
2134 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2135 | goto free_dynamic_buffer; | |
2136 | } | |
2137 | ||
2138 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2139 | (listing.data + listing.size); | |
2140 | ret = lttng_userspace_probe_location_flatten( | |
2141 | probe_location, &listing); | |
2142 | lttng_userspace_probe_location_destroy(probe_location); | |
2143 | if (ret < 0) { | |
2144 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2145 | goto free_dynamic_buffer; | |
2146 | } | |
2147 | ||
2148 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2149 | } | |
de453daa JG |
2150 | } |
2151 | ||
56f0bc67 JG |
2152 | /* Don't reset listing buffer as we return its content. */ |
2153 | *events = (struct lttng_event *) listing.data; | |
2154 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2155 | ret = (int) nb_events; |
56f0bc67 JG |
2156 | free_dynamic_buffer: |
2157 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2158 | end: |
b4e3ceb9 | 2159 | free(cmd_header); |
de453daa | 2160 | free(reception_buffer); |
b4e3ceb9 | 2161 | return ret; |
9f19cc17 DG |
2162 | } |
2163 | ||
fac6795d | 2164 | /* |
1c8d13c8 TD |
2165 | * Sets the tracing_group variable with name. |
2166 | * This function allocates memory pointed to by tracing_group. | |
2167 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2168 | */ |
2169 | int lttng_set_tracing_group(const char *name) | |
2170 | { | |
9d697d3d | 2171 | if (name == NULL) { |
2f70b271 | 2172 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2173 | } |
2174 | ||
fac6795d | 2175 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2176 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2177 | } |
2178 | ||
2179 | return 0; | |
2180 | } | |
2181 | ||
cd80958d | 2182 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2183 | struct lttng_calibrate *calibrate) |
2184 | { | |
b812e5ca PP |
2185 | /* |
2186 | * This command was removed in LTTng 2.9. | |
2187 | */ | |
2188 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2189 | } |
2190 | ||
5edd7e09 DG |
2191 | /* |
2192 | * Set default channel attributes. | |
441c16a7 | 2193 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2194 | */ |
2195 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2196 | struct lttng_channel_attr *attr) | |
2197 | { | |
294851b0 | 2198 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2199 | |
5edd7e09 DG |
2200 | /* Safety check */ |
2201 | if (attr == NULL || domain == NULL) { | |
2202 | return; | |
2203 | } | |
2204 | ||
294851b0 | 2205 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2206 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2207 | ||
0a9c6494 DG |
2208 | /* Same for all domains. */ |
2209 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2210 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2211 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2212 | ||
5edd7e09 DG |
2213 | switch (domain->type) { |
2214 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2215 | attr->switch_timer_interval = |
2216 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2217 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2218 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2219 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2220 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2221 | if (extended) { |
2222 | extended->monitor_timer_interval = | |
2223 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2224 | extended->blocking_timeout = |
2225 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2226 | } |
5edd7e09 DG |
2227 | break; |
2228 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2229 | switch (domain->buf_type) { |
2230 | case LTTNG_BUFFER_PER_UID: | |
2231 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2232 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2233 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2234 | attr->switch_timer_interval = |
2235 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2236 | attr->read_timer_interval = | |
2237 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2238 | if (extended) { |
2239 | extended->monitor_timer_interval = | |
2240 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2241 | extended->blocking_timeout = |
2242 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2243 | } |
0a9c6494 DG |
2244 | break; |
2245 | case LTTNG_BUFFER_PER_PID: | |
2246 | default: | |
2247 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2248 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2249 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2250 | attr->switch_timer_interval = |
2251 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2252 | attr->read_timer_interval = | |
2253 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2254 | if (extended) { |
2255 | extended->monitor_timer_interval = | |
2256 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2257 | extended->blocking_timeout = |
2258 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2259 | } |
0a9c6494 DG |
2260 | break; |
2261 | } | |
5edd7e09 | 2262 | default: |
441c16a7 | 2263 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2264 | break; |
2265 | } | |
cf0bcb51 JG |
2266 | |
2267 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2268 | } |
2269 | ||
5ba3702f JG |
2270 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2271 | uint64_t *discarded_events) | |
2272 | { | |
2273 | int ret = 0; | |
cf0bcb51 | 2274 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2275 | |
2276 | if (!channel || !discarded_events) { | |
2277 | ret = -LTTNG_ERR_INVALID; | |
2278 | goto end; | |
2279 | } | |
2280 | ||
2281 | chan_ext = channel->attr.extended.ptr; | |
2282 | if (!chan_ext) { | |
2283 | /* | |
2284 | * This can happen since the lttng_channel structure is | |
2285 | * used for other tasks where this pointer is never set. | |
2286 | */ | |
2287 | *discarded_events = 0; | |
2288 | goto end; | |
2289 | } | |
2290 | ||
2291 | *discarded_events = chan_ext->discarded_events; | |
2292 | end: | |
2293 | return ret; | |
2294 | } | |
2295 | ||
2296 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2297 | uint64_t *lost_packets) | |
2298 | { | |
2299 | int ret = 0; | |
cf0bcb51 | 2300 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2301 | |
2302 | if (!channel || !lost_packets) { | |
2303 | ret = -LTTNG_ERR_INVALID; | |
2304 | goto end; | |
2305 | } | |
2306 | ||
2307 | chan_ext = channel->attr.extended.ptr; | |
2308 | if (!chan_ext) { | |
2309 | /* | |
2310 | * This can happen since the lttng_channel structure is | |
2311 | * used for other tasks where this pointer is never set. | |
2312 | */ | |
2313 | *lost_packets = 0; | |
2314 | goto end; | |
2315 | } | |
2316 | ||
2317 | *lost_packets = chan_ext->lost_packets; | |
2318 | end: | |
2319 | return ret; | |
2320 | } | |
2321 | ||
cf0bcb51 JG |
2322 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2323 | uint64_t *monitor_timer_interval) | |
2324 | { | |
2325 | int ret = 0; | |
2326 | ||
2327 | if (!chan || !monitor_timer_interval) { | |
2328 | ret = -LTTNG_ERR_INVALID; | |
2329 | goto end; | |
2330 | } | |
2331 | ||
2332 | if (!chan->attr.extended.ptr) { | |
2333 | ret = -LTTNG_ERR_INVALID; | |
2334 | goto end; | |
2335 | } | |
2336 | ||
2337 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2338 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2339 | end: | |
2340 | return ret; | |
2341 | } | |
2342 | ||
2343 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2344 | uint64_t monitor_timer_interval) | |
2345 | { | |
2346 | int ret = 0; | |
2347 | ||
2348 | if (!chan || !chan->attr.extended.ptr) { | |
2349 | ret = -LTTNG_ERR_INVALID; | |
2350 | goto end; | |
2351 | } | |
2352 | ||
2353 | ((struct lttng_channel_extended *) | |
2354 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2355 | monitor_timer_interval; | |
2356 | end: | |
2357 | return ret; | |
2358 | } | |
2359 | ||
491d1539 MD |
2360 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2361 | int64_t *blocking_timeout) | |
2362 | { | |
2363 | int ret = 0; | |
2364 | ||
2365 | if (!chan || !blocking_timeout) { | |
2366 | ret = -LTTNG_ERR_INVALID; | |
2367 | goto end; | |
2368 | } | |
2369 | ||
2370 | if (!chan->attr.extended.ptr) { | |
2371 | ret = -LTTNG_ERR_INVALID; | |
2372 | goto end; | |
2373 | } | |
2374 | ||
2375 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2376 | chan->attr.extended.ptr)->blocking_timeout; | |
2377 | end: | |
2378 | return ret; | |
2379 | } | |
2380 | ||
2381 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2382 | int64_t blocking_timeout) | |
2383 | { | |
2384 | int ret = 0; | |
2385 | int64_t msec_timeout; | |
2386 | ||
2387 | if (!chan || !chan->attr.extended.ptr) { | |
2388 | ret = -LTTNG_ERR_INVALID; | |
2389 | goto end; | |
2390 | } | |
2391 | ||
2392 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2393 | ret = -LTTNG_ERR_INVALID; | |
2394 | goto end; | |
2395 | } | |
2396 | ||
2397 | /* | |
2398 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2399 | * us to accept a narrower range of values (msecs expressed as a signed | |
2400 | * 32-bit integer). | |
2401 | */ | |
2402 | msec_timeout = blocking_timeout / 1000; | |
2403 | if (msec_timeout != (int32_t) msec_timeout) { | |
2404 | ret = -LTTNG_ERR_INVALID; | |
2405 | goto end; | |
2406 | } | |
2407 | ||
2408 | ((struct lttng_channel_extended *) | |
2409 | chan->attr.extended.ptr)->blocking_timeout = | |
2410 | blocking_timeout; | |
2411 | end: | |
2412 | return ret; | |
2413 | } | |
2414 | ||
fac6795d | 2415 | /* |
2269e89e | 2416 | * Check if session daemon is alive. |
fac6795d | 2417 | * |
2269e89e | 2418 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2419 | * On error returns a negative value. |
fac6795d | 2420 | */ |
947308c4 | 2421 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2422 | { |
2423 | int ret; | |
2424 | ||
2425 | ret = set_session_daemon_path(); | |
2426 | if (ret < 0) { | |
9ae110e2 | 2427 | /* Error. */ |
fac6795d DG |
2428 | return ret; |
2429 | } | |
2430 | ||
9d035200 | 2431 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2432 | /* |
9ae110e2 JG |
2433 | * No socket path set. Weird error which means the constructor |
2434 | * was not called. | |
2f70b271 DG |
2435 | */ |
2436 | assert(0); | |
fac6795d DG |
2437 | } |
2438 | ||
2269e89e | 2439 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2440 | if (ret < 0) { |
9ae110e2 | 2441 | /* Not alive. */ |
7d8234d9 MD |
2442 | return 0; |
2443 | } | |
7d8234d9 | 2444 | |
9ae110e2 | 2445 | /* Is alive. */ |
947308c4 | 2446 | return 1; |
fac6795d DG |
2447 | } |
2448 | ||
00e2e675 | 2449 | /* |
a4b92340 | 2450 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2451 | * |
2452 | * Return 0 on success, else a negative value. | |
2453 | */ | |
a4b92340 DG |
2454 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2455 | const char *control_url, const char *data_url) | |
00e2e675 | 2456 | { |
3dd05a85 | 2457 | int ret; |
a4b92340 | 2458 | ssize_t size; |
00e2e675 | 2459 | struct lttcomm_session_msg lsm; |
a4b92340 | 2460 | struct lttng_uri *uris = NULL; |
00e2e675 | 2461 | |
a4b92340 | 2462 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2463 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2464 | } |
2465 | ||
a4b92340 DG |
2466 | memset(&lsm, 0, sizeof(lsm)); |
2467 | ||
00e2e675 DG |
2468 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2469 | ||
cac3069d | 2470 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2471 | sizeof(lsm.session.name)); |
cac3069d | 2472 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2473 | |
bc894455 | 2474 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2475 | if (size < 0) { |
2f70b271 | 2476 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2477 | } |
2478 | ||
2479 | lsm.u.uri.size = size; | |
00e2e675 | 2480 | |
795a978d | 2481 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2482 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2483 | |
2484 | free(uris); | |
2485 | return ret; | |
00e2e675 DG |
2486 | } |
2487 | ||
2488 | /* | |
9c6bda17 | 2489 | * [OBSOLETE] |
00e2e675 DG |
2490 | */ |
2491 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2492 | { | |
785d2d0d | 2493 | return -ENOSYS; |
00e2e675 DG |
2494 | } |
2495 | ||
2496 | /* | |
9c6bda17 | 2497 | * [OBSOLETE] |
00e2e675 DG |
2498 | */ |
2499 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2500 | { | |
785d2d0d | 2501 | return -ENOSYS; |
00e2e675 DG |
2502 | } |
2503 | ||
07424f16 DG |
2504 | /* |
2505 | * This is an extension of create session that is ONLY and SHOULD only be used | |
2506 | * by the lttng command line program. It exists to avoid using URI parsing in | |
2507 | * the lttng client. | |
2508 | * | |
2509 | * We need the date and time for the trace path subdirectory for the case where | |
2510 | * the user does NOT define one using either -o or -U. Using the normal | |
2511 | * lttng_create_session API call, we have no clue on the session daemon side if | |
2512 | * the URL was generated automatically by the client or define by the user. | |
2513 | * | |
2514 | * So this function "wrapper" is hidden from the public API, takes the datetime | |
2515 | * string and appends it if necessary to the URI subdirectory before sending it | |
2516 | * to the session daemon. | |
2517 | * | |
2518 | * With this extra function, the lttng_create_session call behavior is not | |
2519 | * changed and the timestamp is appended to the URI on the session daemon side | |
2520 | * if necessary. | |
2521 | */ | |
2522 | int _lttng_create_session_ext(const char *name, const char *url, | |
2523 | const char *datetime) | |
2524 | { | |
3dd05a85 | 2525 | int ret; |
07424f16 DG |
2526 | ssize_t size; |
2527 | struct lttcomm_session_msg lsm; | |
2528 | struct lttng_uri *uris = NULL; | |
2529 | ||
2bba9e53 | 2530 | if (name == NULL || datetime == NULL) { |
2f70b271 | 2531 | return -LTTNG_ERR_INVALID; |
07424f16 DG |
2532 | } |
2533 | ||
2534 | memset(&lsm, 0, sizeof(lsm)); | |
2535 | ||
2536 | lsm.cmd_type = LTTNG_CREATE_SESSION; | |
cac3069d | 2537 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); |
07424f16 | 2538 | |
9ae110e2 | 2539 | /* There should never be a data URL. */ |
bc894455 | 2540 | size = uri_parse_str_urls(url, NULL, &uris); |
07424f16 | 2541 | if (size < 0) { |
3dd05a85 DG |
2542 | ret = -LTTNG_ERR_INVALID; |
2543 | goto error; | |
07424f16 DG |
2544 | } |
2545 | ||
2546 | lsm.u.uri.size = size; | |
2547 | ||
4b35a6b3 | 2548 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
da4aa2b8 DG |
2549 | /* Don't append datetime if the name was automatically created. */ |
2550 | if (strncmp(name, DEFAULT_SESSION_NAME "-", | |
2551 | strlen(DEFAULT_SESSION_NAME) + 1)) { | |
2552 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s", | |
2553 | name, datetime); | |
2554 | } else { | |
2555 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2556 | } | |
07424f16 DG |
2557 | if (ret < 0) { |
2558 | PERROR("snprintf uri subdir"); | |
3dd05a85 DG |
2559 | ret = -LTTNG_ERR_FATAL; |
2560 | goto error; | |
07424f16 DG |
2561 | } |
2562 | } | |
2563 | ||
795a978d | 2564 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2565 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2566 | |
2567 | error: | |
2568 | free(uris); | |
2569 | return ret; | |
07424f16 DG |
2570 | } |
2571 | ||
806e2684 DG |
2572 | /* |
2573 | * For a given session name, this call checks if the data is ready to be read | |
2574 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2575 | * any readers. | |
2576 | */ | |
6d805429 | 2577 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2578 | { |
2579 | int ret; | |
2580 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2581 | uint8_t *pending = NULL; |
806e2684 DG |
2582 | |
2583 | if (session_name == NULL) { | |
2584 | return -LTTNG_ERR_INVALID; | |
2585 | } | |
2586 | ||
53efb85a | 2587 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2588 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2589 | |
cac3069d DG |
2590 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2591 | sizeof(lsm.session.name)); | |
806e2684 | 2592 | |
f6151c55 JG |
2593 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2594 | if (ret < 0) { | |
2595 | goto end; | |
2596 | } else if (ret != 1) { | |
2597 | /* Unexpected payload size */ | |
2598 | ret = -LTTNG_ERR_INVALID; | |
2599 | goto end; | |
806e2684 DG |
2600 | } |
2601 | ||
f6151c55 JG |
2602 | ret = (int) *pending; |
2603 | end: | |
2604 | free(pending); | |
806e2684 DG |
2605 | return ret; |
2606 | } | |
2607 | ||
27babd3a DG |
2608 | /* |
2609 | * Create a session exclusively used for snapshot. | |
2610 | * | |
2611 | * Returns LTTNG_OK on success or a negative error code. | |
2612 | */ | |
2613 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2614 | { | |
2615 | int ret; | |
2616 | ssize_t size; | |
2617 | struct lttcomm_session_msg lsm; | |
2618 | struct lttng_uri *uris = NULL; | |
2619 | ||
2620 | if (name == NULL) { | |
2621 | return -LTTNG_ERR_INVALID; | |
2622 | } | |
2623 | ||
2624 | memset(&lsm, 0, sizeof(lsm)); | |
2625 | ||
2626 | lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT; | |
2627 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2628 | ||
2629 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2630 | if (size < 0) { | |
2631 | return -LTTNG_ERR_INVALID; | |
2632 | } | |
2633 | ||
2634 | lsm.u.uri.size = size; | |
2635 | ||
10d65351 JD |
2636 | /* |
2637 | * If the user does not specify a custom subdir, use the session name. | |
2638 | */ | |
2639 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { | |
2640 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
2641 | if (ret < 0) { | |
2642 | PERROR("snprintf uri subdir"); | |
2643 | ret = -LTTNG_ERR_FATAL; | |
2644 | goto error; | |
2645 | } | |
2646 | } | |
2647 | ||
795a978d | 2648 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
27babd3a DG |
2649 | sizeof(struct lttng_uri) * size, NULL); |
2650 | ||
10d65351 | 2651 | error: |
27babd3a DG |
2652 | free(uris); |
2653 | return ret; | |
2654 | } | |
2655 | ||
ecc48a90 JD |
2656 | /* |
2657 | * Create a session exclusively used for live. | |
2658 | * | |
2659 | * Returns LTTNG_OK on success or a negative error code. | |
2660 | */ | |
2661 | int lttng_create_session_live(const char *name, const char *url, | |
2662 | unsigned int timer_interval) | |
2663 | { | |
2664 | int ret; | |
2665 | ssize_t size; | |
2666 | struct lttcomm_session_msg lsm; | |
2667 | struct lttng_uri *uris = NULL; | |
2668 | ||
92805ee4 | 2669 | if (name == NULL || timer_interval == 0) { |
ecc48a90 JD |
2670 | return -LTTNG_ERR_INVALID; |
2671 | } | |
2672 | ||
2673 | memset(&lsm, 0, sizeof(lsm)); | |
2674 | ||
2675 | lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE; | |
2676 | lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name)); | |
2677 | ||
1a241656 DG |
2678 | if (url) { |
2679 | size = uri_parse_str_urls(url, NULL, &uris); | |
2680 | if (size <= 0) { | |
2681 | ret = -LTTNG_ERR_INVALID; | |
2682 | goto end; | |
2683 | } | |
ecc48a90 | 2684 | |
1a241656 DG |
2685 | /* file:// is not accepted for live session. */ |
2686 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
2687 | ret = -LTTNG_ERR_INVALID; | |
2688 | goto end; | |
2689 | } | |
2690 | } else { | |
2691 | size = 0; | |
ecc48a90 JD |
2692 | } |
2693 | ||
2694 | lsm.u.session_live.nb_uri = size; | |
2695 | lsm.u.session_live.timer_interval = timer_interval; | |
2696 | ||
795a978d | 2697 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
ecc48a90 JD |
2698 | sizeof(struct lttng_uri) * size, NULL); |
2699 | ||
2700 | end: | |
2701 | free(uris); | |
2702 | return ret; | |
2703 | } | |
2704 | ||
a5dfbb9d MD |
2705 | /* |
2706 | * List PIDs in the tracker. | |
2707 | * | |
1b18ce93 JG |
2708 | * enabled is set to whether the PID tracker is enabled. |
2709 | * pids is set to an allocated array of PIDs currently tracked. On | |
2710 | * success, pids must be freed by the caller. | |
2711 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2712 | * |
2713 | * Returns 0 on success, else a negative LTTng error code. | |
2714 | */ | |
2715 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2716 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2717 | { | |
ebbf5ab7 JR |
2718 | int ret; |
2719 | int enabled = 1; | |
a5dfbb9d MD |
2720 | struct lttcomm_session_msg lsm; |
2721 | size_t nr_pids; | |
2722 | int32_t *pids; | |
2723 | ||
2724 | if (handle == NULL) { | |
2725 | return -LTTNG_ERR_INVALID; | |
2726 | } | |
2727 | ||
2728 | memset(&lsm, 0, sizeof(lsm)); | |
2729 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2730 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2731 | sizeof(lsm.session.name)); | |
2732 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2733 | ||
2734 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2735 | if (ret < 0) { | |
2736 | return ret; | |
2737 | } | |
2738 | nr_pids = ret / sizeof(int32_t); | |
2739 | if (nr_pids == 1 && pids[0] == -1) { | |
2740 | free(pids); | |
2741 | pids = NULL; | |
2742 | enabled = 0; | |
2743 | nr_pids = 0; | |
2744 | } | |
2745 | *_enabled = enabled; | |
2746 | *_pids = pids; | |
2747 | *_nr_pids = nr_pids; | |
2748 | return 0; | |
2749 | } | |
2750 | ||
93ec662e JD |
2751 | /* |
2752 | * Regenerate the metadata for a session. | |
2753 | * Return 0 on success, a negative error code on error. | |
2754 | */ | |
eded6438 | 2755 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2756 | { |
2757 | int ret; | |
2758 | struct lttcomm_session_msg lsm; | |
2759 | ||
2760 | if (!session_name) { | |
2761 | ret = -LTTNG_ERR_INVALID; | |
2762 | goto end; | |
2763 | } | |
2764 | ||
2765 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2766 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2767 | |
2768 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2769 | sizeof(lsm.session.name)); | |
2770 | ||
2771 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2772 | if (ret < 0) { | |
2773 | goto end; | |
2774 | } | |
2775 | ||
2776 | ret = 0; | |
2777 | end: | |
2778 | return ret; | |
2779 | } | |
2780 | ||
eded6438 JD |
2781 | /* |
2782 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2783 | */ | |
2784 | int lttng_metadata_regenerate(const char *session_name) | |
2785 | { | |
2786 | return lttng_regenerate_metadata(session_name); | |
2787 | } | |
2788 | ||
c2561365 JD |
2789 | /* |
2790 | * Regenerate the statedump of a session. | |
2791 | * Return 0 on success, a negative error code on error. | |
2792 | */ | |
2793 | int lttng_regenerate_statedump(const char *session_name) | |
2794 | { | |
2795 | int ret; | |
2796 | struct lttcomm_session_msg lsm; | |
2797 | ||
2798 | if (!session_name) { | |
2799 | ret = -LTTNG_ERR_INVALID; | |
2800 | goto end; | |
2801 | } | |
2802 | ||
2803 | memset(&lsm, 0, sizeof(lsm)); | |
2804 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2805 | ||
2806 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2807 | sizeof(lsm.session.name)); | |
2808 | ||
2809 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2810 | if (ret < 0) { | |
2811 | goto end; | |
2812 | } | |
2813 | ||
2814 | ret = 0; | |
2815 | end: | |
2816 | return ret; | |
2817 | } | |
2818 | ||
a58c490f JG |
2819 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2820 | { | |
2821 | int ret; | |
2822 | struct lttcomm_session_msg lsm; | |
3647288f | 2823 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2824 | |
3647288f | 2825 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2826 | if (!trigger) { |
2827 | ret = -LTTNG_ERR_INVALID; | |
2828 | goto end; | |
2829 | } | |
2830 | ||
2831 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 2832 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2833 | goto end; |
2834 | } | |
2835 | ||
3647288f JG |
2836 | ret = lttng_trigger_serialize(trigger, &buffer); |
2837 | if (ret < 0) { | |
a58c490f JG |
2838 | ret = -LTTNG_ERR_UNK; |
2839 | goto end; | |
2840 | } | |
2841 | ||
a58c490f JG |
2842 | memset(&lsm, 0, sizeof(lsm)); |
2843 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
2844 | lsm.u.trigger.length = (uint32_t) buffer.size; |
2845 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
2846 | buffer.size, NULL); | |
a58c490f | 2847 | end: |
3647288f | 2848 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
2849 | return ret; |
2850 | } | |
2851 | ||
2852 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
2853 | { | |
2854 | int ret; | |
2855 | struct lttcomm_session_msg lsm; | |
3647288f | 2856 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2857 | |
3647288f | 2858 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2859 | if (!trigger) { |
2860 | ret = -LTTNG_ERR_INVALID; | |
2861 | goto end; | |
2862 | } | |
2863 | ||
2864 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 2865 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2866 | goto end; |
2867 | } | |
2868 | ||
3647288f JG |
2869 | ret = lttng_trigger_serialize(trigger, &buffer); |
2870 | if (ret < 0) { | |
a58c490f JG |
2871 | ret = -LTTNG_ERR_UNK; |
2872 | goto end; | |
2873 | } | |
2874 | ||
a58c490f JG |
2875 | memset(&lsm, 0, sizeof(lsm)); |
2876 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
2877 | lsm.u.trigger.length = (uint32_t) buffer.size; |
2878 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
2879 | buffer.size, NULL); | |
a58c490f | 2880 | end: |
3647288f | 2881 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
2882 | return ret; |
2883 | } | |
2884 | ||
d68c9a04 JD |
2885 | int lttng_session_get_current_archive_location(const char *session_name, |
2886 | char **chunk_path) | |
2887 | { | |
2888 | struct lttcomm_session_msg lsm; | |
2889 | struct lttng_session_get_current_output_return *output_return = NULL; | |
2890 | int ret; | |
2891 | size_t path_len; | |
2892 | ||
2893 | memset(&lsm, 0, sizeof(lsm)); | |
2894 | lsm.cmd_type = LTTNG_SESSION_GET_CURRENT_OUTPUT; | |
2895 | ret = lttng_strncpy(lsm.session.name, session_name, | |
2896 | sizeof(lsm.session.name)); | |
2897 | if (ret) { | |
2898 | ret = -LTTNG_ERR_INVALID; | |
2899 | goto end; | |
2900 | } | |
2901 | ||
2902 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &output_return); | |
2903 | if (ret < 0) { | |
2904 | ret = -1; | |
2905 | goto end; | |
2906 | } | |
2907 | ||
2908 | path_len = lttng_strnlen(output_return->path, | |
2909 | sizeof(output_return->path)); | |
2910 | if (path_len == 0 || path_len == sizeof(output_return->path)) { | |
2911 | ret = -LTTNG_ERR_NO_SESSION_OUTPUT; | |
2912 | goto end; | |
2913 | } | |
2914 | ||
2915 | *chunk_path = zmalloc(path_len + 1); | |
2916 | if (!*chunk_path) { | |
2917 | ret = -1; | |
2918 | goto end; | |
2919 | } | |
2920 | memcpy(*chunk_path, output_return->path, path_len); | |
2921 | ||
2922 | ret = 0; | |
2923 | ||
2924 | end: | |
2925 | free(output_return); | |
2926 | return ret; | |
2927 | } | |
2928 | ||
fac6795d | 2929 | /* |
9ae110e2 | 2930 | * lib constructor. |
fac6795d | 2931 | */ |
b2b89e8a | 2932 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
2933 | { |
2934 | /* Set default session group */ | |
bbccc3d2 | 2935 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 2936 | } |
49cca668 DG |
2937 | |
2938 | /* | |
9ae110e2 | 2939 | * lib destructor. |
49cca668 | 2940 | */ |
b2b89e8a | 2941 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
2942 | { |
2943 | free(tracing_group); | |
2944 | } |