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> |
b178f53e JG |
46 | #include <lttng/session-internal.h> |
47 | #include <lttng/session-descriptor-internal.h> | |
3e3665b8 | 48 | #include <lttng/destruction-handle.h> |
2d97a006 | 49 | #include <lttng/tracker-internal.h> |
fac6795d | 50 | |
d00c599e DG |
51 | #include "filter/filter-ast.h" |
52 | #include "filter/filter-parser.h" | |
53 | #include "filter/filter-bytecode.h" | |
54 | #include "filter/memstream.h" | |
cac3069d | 55 | #include "lttng-ctl-helper.h" |
53a80697 MD |
56 | |
57 | #ifdef DEBUG | |
d00c599e | 58 | static const int print_xml = 1; |
53a80697 MD |
59 | #define dbg_printf(fmt, args...) \ |
60 | printf("[debug liblttng-ctl] " fmt, ## args) | |
61 | #else | |
d00c599e | 62 | static const int print_xml = 0; |
53a80697 MD |
63 | #define dbg_printf(fmt, args...) \ |
64 | do { \ | |
65 | /* do nothing but check printf format */ \ | |
66 | if (0) \ | |
67 | printf("[debug liblttnctl] " fmt, ## args); \ | |
68 | } while (0) | |
69 | #endif | |
70 | ||
60160d2a JG |
71 | #define COPY_DOMAIN_PACKED(dst, src) \ |
72 | do { \ | |
73 | struct lttng_domain _tmp_domain; \ | |
74 | \ | |
75 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
76 | dst = _tmp_domain; \ | |
77 | } while (0) | |
53a80697 | 78 | |
fac6795d | 79 | /* Socket to session daemon for communication */ |
3e3665b8 | 80 | static int sessiond_socket = -1; |
fac6795d DG |
81 | static char sessiond_sock_path[PATH_MAX]; |
82 | ||
fac6795d DG |
83 | /* Variables */ |
84 | static char *tracing_group; | |
85 | static int connected; | |
86 | ||
97e19046 DG |
87 | /* Global */ |
88 | ||
89 | /* | |
90 | * Those two variables are used by error.h to silent or control the verbosity of | |
91 | * error message. They are global to the library so application linking with it | |
92 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
93 | */ |
94 | int lttng_opt_quiet; | |
95 | int lttng_opt_verbose; | |
c7e35b03 | 96 | int lttng_opt_mi; |
97e19046 | 97 | |
99497cd0 MD |
98 | /* |
99 | * Copy string from src to dst and enforce null terminated byte. | |
100 | */ | |
cac3069d DG |
101 | LTTNG_HIDDEN |
102 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 103 | { |
e7d6716d | 104 | if (src && dst) { |
99497cd0 MD |
105 | strncpy(dst, src, len); |
106 | /* Enforce the NULL terminated byte */ | |
107 | dst[len - 1] = '\0'; | |
cd80958d DG |
108 | } else if (dst) { |
109 | dst[0] = '\0'; | |
99497cd0 MD |
110 | } |
111 | } | |
112 | ||
fac6795d | 113 | /* |
cd80958d | 114 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 115 | * |
cd80958d DG |
116 | * If domain is unknown, default domain will be the kernel. |
117 | */ | |
cac3069d DG |
118 | LTTNG_HIDDEN |
119 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
120 | struct lttng_domain *src) | |
cd80958d DG |
121 | { |
122 | if (src && dst) { | |
123 | switch (src->type) { | |
00e2e675 DG |
124 | case LTTNG_DOMAIN_KERNEL: |
125 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 126 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 127 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 128 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
129 | memcpy(dst, src, sizeof(struct lttng_domain)); |
130 | break; | |
131 | default: | |
132 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 133 | break; |
cd80958d DG |
134 | } |
135 | } | |
136 | } | |
137 | ||
138 | /* | |
139 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 140 | * |
1c8d13c8 TD |
141 | * On success, returns the number of bytes sent (>=0) |
142 | * On error, returns -1 | |
fac6795d | 143 | */ |
cd80958d | 144 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
145 | { |
146 | int ret; | |
147 | ||
148 | if (!connected) { | |
2f70b271 | 149 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 150 | goto end; |
fac6795d DG |
151 | } |
152 | ||
a4b92340 DG |
153 | DBG("LSM cmd type : %d", lsm->cmd_type); |
154 | ||
be040666 | 155 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 156 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
157 | if (ret < 0) { |
158 | ret = -LTTNG_ERR_FATAL; | |
159 | } | |
e065084a DG |
160 | |
161 | end: | |
162 | return ret; | |
163 | } | |
164 | ||
53a80697 MD |
165 | /* |
166 | * Send var len data to the session daemon. | |
167 | * | |
168 | * On success, returns the number of bytes sent (>=0) | |
169 | * On error, returns -1 | |
170 | */ | |
c2d69327 | 171 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
172 | { |
173 | int ret; | |
174 | ||
175 | if (!connected) { | |
2f70b271 | 176 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
177 | goto end; |
178 | } | |
a4b92340 | 179 | |
53a80697 MD |
180 | if (!data || !len) { |
181 | ret = 0; | |
182 | goto end; | |
183 | } | |
184 | ||
185 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
186 | if (ret < 0) { |
187 | ret = -LTTNG_ERR_FATAL; | |
188 | } | |
53a80697 MD |
189 | |
190 | end: | |
191 | return ret; | |
192 | } | |
193 | ||
a04d53fc FD |
194 | /* |
195 | * Send file descriptors to the session daemon. | |
196 | * | |
197 | * On success, returns the number of bytes sent (>=0) | |
198 | * On error, returns -1 | |
199 | */ | |
200 | static int send_session_fds(const int *fds, size_t nb_fd) | |
201 | { | |
202 | int ret; | |
203 | ||
204 | if (!connected) { | |
205 | ret = -LTTNG_ERR_NO_SESSIOND; | |
206 | goto end; | |
207 | } | |
208 | ||
209 | if (!fds || !nb_fd) { | |
210 | ret = 0; | |
211 | goto end; | |
212 | } | |
213 | ||
214 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
215 | if (ret < 0) { | |
216 | ret = -LTTNG_ERR_FATAL; | |
217 | } | |
218 | ||
219 | end: | |
220 | return ret; | |
221 | } | |
222 | ||
e065084a | 223 | /* |
cd80958d | 224 | * Receive data from the sessiond socket. |
e065084a | 225 | * |
1c8d13c8 TD |
226 | * On success, returns the number of bytes received (>=0) |
227 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 228 | */ |
ca95a216 | 229 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
230 | { |
231 | int ret; | |
232 | ||
233 | if (!connected) { | |
2f70b271 | 234 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 235 | goto end; |
fac6795d DG |
236 | } |
237 | ||
ca95a216 | 238 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
239 | if (ret < 0) { |
240 | ret = -LTTNG_ERR_FATAL; | |
241 | } | |
fac6795d | 242 | |
e065084a | 243 | end: |
fac6795d DG |
244 | return ret; |
245 | } | |
246 | ||
247 | /* | |
9ae110e2 | 248 | * Check if we are in the specified group. |
65beb5ff | 249 | * |
9ae110e2 | 250 | * If yes return 1, else return -1. |
947308c4 | 251 | */ |
6c71277b MD |
252 | LTTNG_HIDDEN |
253 | int lttng_check_tracing_group(void) | |
947308c4 | 254 | { |
28ab59d0 | 255 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
256 | int grp_list_size, grp_id, i; |
257 | int ret = -1; | |
6c71277b | 258 | const char *grp_name = tracing_group; |
947308c4 DG |
259 | |
260 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 261 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 262 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
263 | goto end; |
264 | } | |
265 | ||
266 | /* Get number of supplementary group IDs */ | |
267 | grp_list_size = getgroups(0, NULL); | |
268 | if (grp_list_size < 0) { | |
6f04ed72 | 269 | PERROR("getgroups"); |
947308c4 DG |
270 | goto end; |
271 | } | |
272 | ||
273 | /* Alloc group list of the right size */ | |
3f451dc0 | 274 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 275 | if (!grp_list) { |
6f04ed72 | 276 | PERROR("malloc"); |
00795392 MD |
277 | goto end; |
278 | } | |
947308c4 | 279 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 280 | if (grp_id < 0) { |
6f04ed72 | 281 | PERROR("getgroups"); |
947308c4 DG |
282 | goto free_list; |
283 | } | |
284 | ||
285 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 286 | if (grp_list[i] == tracing_gid) { |
2269e89e | 287 | ret = 1; |
947308c4 DG |
288 | break; |
289 | } | |
290 | } | |
291 | ||
292 | free_list: | |
293 | free(grp_list); | |
294 | ||
295 | end: | |
296 | return ret; | |
297 | } | |
298 | ||
09b72f7a FD |
299 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
300 | { | |
301 | int ret; | |
302 | long num_cpu; | |
303 | size_t best_mem_info; | |
304 | size_t num_bytes_requested_total; | |
305 | ||
306 | /* | |
307 | * Get the number of CPU currently online to compute the amount of | |
308 | * memory needed to create a buffer for every CPU. | |
309 | */ | |
310 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
311 | if (num_cpu == -1) { | |
312 | goto error; | |
313 | } | |
314 | ||
315 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
316 | ||
317 | /* | |
318 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
319 | * reliable estimate we can get but it is only exposed by the kernel | |
320 | * since 3.14. (See Linux kernel commit: | |
321 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
322 | */ | |
323 | ret = utils_get_memory_available(&best_mem_info); | |
324 | if (ret >= 0) { | |
325 | goto success; | |
326 | } | |
327 | ||
328 | /* | |
329 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
330 | * is a sanity check for obvious user error. | |
331 | */ | |
332 | ret = utils_get_memory_total(&best_mem_info); | |
333 | if (ret >= 0) { | |
334 | goto success; | |
335 | } | |
336 | ||
337 | error: | |
338 | return -1; | |
339 | success: | |
340 | return best_mem_info >= num_bytes_requested_total; | |
341 | } | |
342 | ||
947308c4 | 343 | /* |
2269e89e DG |
344 | * Try connect to session daemon with sock_path. |
345 | * | |
346 | * Return 0 on success, else -1 | |
347 | */ | |
348 | static int try_connect_sessiond(const char *sock_path) | |
349 | { | |
350 | int ret; | |
351 | ||
352 | /* If socket exist, we check if the daemon listens for connect. */ | |
353 | ret = access(sock_path, F_OK); | |
354 | if (ret < 0) { | |
355 | /* Not alive */ | |
2f70b271 | 356 | goto error; |
2269e89e DG |
357 | } |
358 | ||
359 | ret = lttcomm_connect_unix_sock(sock_path); | |
360 | if (ret < 0) { | |
9ae110e2 | 361 | /* Not alive. */ |
2f70b271 | 362 | goto error; |
2269e89e DG |
363 | } |
364 | ||
365 | ret = lttcomm_close_unix_sock(ret); | |
366 | if (ret < 0) { | |
6f04ed72 | 367 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
368 | } |
369 | ||
370 | return 0; | |
2f70b271 DG |
371 | |
372 | error: | |
373 | return -1; | |
2269e89e DG |
374 | } |
375 | ||
376 | /* | |
2f70b271 DG |
377 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
378 | * variable. | |
379 | * | |
380 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
381 | * is somehow too long or ENOMEM). | |
947308c4 DG |
382 | */ |
383 | static int set_session_daemon_path(void) | |
384 | { | |
9ae110e2 | 385 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
386 | uid_t uid; |
387 | ||
388 | uid = getuid(); | |
947308c4 | 389 | |
2269e89e DG |
390 | if (uid != 0) { |
391 | /* Are we in the tracing group ? */ | |
6c71277b | 392 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
393 | } |
394 | ||
08a9c49f | 395 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
396 | lttng_ctl_copy_string(sessiond_sock_path, |
397 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 398 | } |
2269e89e | 399 | |
08a9c49f | 400 | if (uid != 0) { |
c617c0c6 MD |
401 | int ret; |
402 | ||
08a9c49f | 403 | if (in_tgroup) { |
9ae110e2 | 404 | /* Tracing group. */ |
08a9c49f TD |
405 | ret = try_connect_sessiond(sessiond_sock_path); |
406 | if (ret >= 0) { | |
407 | goto end; | |
2269e89e | 408 | } |
08a9c49f | 409 | /* Global session daemon not available... */ |
2269e89e | 410 | } |
08a9c49f TD |
411 | /* ...or not in tracing group (and not root), default */ |
412 | ||
413 | /* | |
9ae110e2 JG |
414 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
415 | * is too small; | |
416 | * With GNU C >= 2.1, snprintf returns the required size | |
417 | * (excluding closing null) | |
08a9c49f TD |
418 | */ |
419 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 420 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 421 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 422 | goto error; |
947308c4 | 423 | } |
947308c4 | 424 | } |
08a9c49f | 425 | end: |
947308c4 | 426 | return 0; |
2f70b271 DG |
427 | |
428 | error: | |
429 | return -1; | |
947308c4 DG |
430 | } |
431 | ||
65beb5ff | 432 | /* |
9ae110e2 | 433 | * Connect to the LTTng session daemon. |
65beb5ff | 434 | * |
3e3665b8 | 435 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 436 | */ |
3e3665b8 | 437 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
438 | { |
439 | int ret; | |
440 | ||
441 | ret = set_session_daemon_path(); | |
442 | if (ret < 0) { | |
2f70b271 | 443 | goto error; |
65beb5ff DG |
444 | } |
445 | ||
9ae110e2 | 446 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
447 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
448 | if (ret < 0) { | |
2f70b271 | 449 | goto error; |
65beb5ff DG |
450 | } |
451 | ||
3e3665b8 | 452 | return ret; |
2f70b271 DG |
453 | |
454 | error: | |
455 | return -1; | |
65beb5ff DG |
456 | } |
457 | ||
3e3665b8 JG |
458 | static void reset_global_sessiond_connection_state(void) |
459 | { | |
460 | sessiond_socket = -1; | |
461 | connected = 0; | |
462 | } | |
463 | ||
65beb5ff | 464 | /* |
1c8d13c8 | 465 | * Clean disconnect from the session daemon. |
9ae110e2 | 466 | * |
1c8d13c8 | 467 | * On success, return 0. On error, return -1. |
65beb5ff DG |
468 | */ |
469 | static int disconnect_sessiond(void) | |
470 | { | |
471 | int ret = 0; | |
472 | ||
473 | if (connected) { | |
474 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 475 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
476 | } |
477 | ||
478 | return ret; | |
479 | } | |
480 | ||
795a978d PP |
481 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
482 | size_t *user_len) | |
483 | { | |
484 | int ret = 0; | |
485 | void *buf = NULL; | |
486 | ||
487 | if (len) { | |
488 | if (!user_len) { | |
489 | ret = -LTTNG_ERR_INVALID; | |
490 | goto end; | |
491 | } | |
492 | ||
493 | buf = zmalloc(len); | |
494 | if (!buf) { | |
495 | ret = -ENOMEM; | |
496 | goto end; | |
497 | } | |
498 | ||
499 | ret = recv_data_sessiond(buf, len); | |
500 | if (ret < 0) { | |
501 | goto end; | |
502 | } | |
503 | ||
504 | if (!user_buf) { | |
505 | ret = -LTTNG_ERR_INVALID; | |
506 | goto end; | |
507 | } | |
508 | ||
509 | /* Move ownership of command header buffer to user. */ | |
510 | *user_buf = buf; | |
511 | buf = NULL; | |
512 | *user_len = len; | |
513 | } else { | |
514 | /* No command header. */ | |
515 | if (user_len) { | |
516 | *user_len = 0; | |
517 | } | |
518 | ||
519 | if (user_buf) { | |
520 | *user_buf = NULL; | |
521 | } | |
522 | } | |
523 | ||
524 | end: | |
525 | free(buf); | |
526 | return ret; | |
527 | } | |
528 | ||
35a6fdb7 | 529 | /* |
cd80958d | 530 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
531 | * Takes extra var. len. data and file descriptors as input to send to the |
532 | * session daemon. | |
65beb5ff | 533 | * |
af87c45a | 534 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 535 | */ |
cac3069d | 536 | LTTNG_HIDDEN |
a04d53fc FD |
537 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
538 | const int *fds, size_t nb_fd, const void *vardata, | |
539 | size_t vardata_len, void **user_payload_buf, | |
540 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
541 | { |
542 | int ret; | |
795a978d | 543 | size_t payload_len; |
cd80958d | 544 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
545 | |
546 | ret = connect_sessiond(); | |
547 | if (ret < 0) { | |
2f70b271 | 548 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 549 | goto end; |
3e3665b8 JG |
550 | } else { |
551 | sessiond_socket = ret; | |
552 | connected = 1; | |
65beb5ff DG |
553 | } |
554 | ||
65beb5ff | 555 | /* Send command to session daemon */ |
cd80958d | 556 | ret = send_session_msg(lsm); |
65beb5ff | 557 | if (ret < 0) { |
2f70b271 | 558 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
559 | goto end; |
560 | } | |
53a80697 | 561 | /* Send var len data */ |
795a978d | 562 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 563 | if (ret < 0) { |
2f70b271 | 564 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
565 | goto end; |
566 | } | |
65beb5ff | 567 | |
a04d53fc FD |
568 | /* Send fds */ |
569 | ret = send_session_fds(fds, nb_fd); | |
570 | if (ret < 0) { | |
571 | /* Ret value is a valid lttng error code. */ | |
572 | goto end; | |
573 | } | |
574 | ||
65beb5ff DG |
575 | /* Get header from data transmission */ |
576 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
577 | if (ret < 0) { | |
2f70b271 | 578 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
579 | goto end; |
580 | } | |
581 | ||
582 | /* Check error code if OK */ | |
f73fabfd | 583 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
584 | ret = -llm.ret_code; |
585 | goto end; | |
586 | } | |
587 | ||
795a978d PP |
588 | /* Get command header from data transmission */ |
589 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
590 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 591 | if (ret < 0) { |
65beb5ff DG |
592 | goto end; |
593 | } | |
594 | ||
795a978d PP |
595 | /* Get payload from data transmission */ |
596 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
597 | &payload_len); | |
598 | if (ret < 0) { | |
83009e5e DG |
599 | goto end; |
600 | } | |
601 | ||
795a978d | 602 | ret = llm.data_size; |
65beb5ff DG |
603 | |
604 | end: | |
605 | disconnect_sessiond(); | |
606 | return ret; | |
607 | } | |
608 | ||
9f19cc17 | 609 | /* |
cd80958d | 610 | * Create lttng handle and return pointer. |
9ae110e2 | 611 | * |
1c8d13c8 | 612 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 613 | */ |
cd80958d DG |
614 | struct lttng_handle *lttng_create_handle(const char *session_name, |
615 | struct lttng_domain *domain) | |
9f19cc17 | 616 | { |
2f70b271 DG |
617 | struct lttng_handle *handle = NULL; |
618 | ||
3f451dc0 | 619 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 620 | if (handle == NULL) { |
2f70b271 | 621 | PERROR("malloc handle"); |
cd80958d DG |
622 | goto end; |
623 | } | |
624 | ||
625 | /* Copy session name */ | |
cac3069d | 626 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
627 | sizeof(handle->session_name)); |
628 | ||
95681498 JG |
629 | /* Copy lttng domain or leave initialized to 0. */ |
630 | if (domain) { | |
631 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
632 | } | |
cd80958d DG |
633 | |
634 | end: | |
635 | return handle; | |
636 | } | |
637 | ||
638 | /* | |
639 | * Destroy handle by free(3) the pointer. | |
640 | */ | |
641 | void lttng_destroy_handle(struct lttng_handle *handle) | |
642 | { | |
0e428499 | 643 | free(handle); |
eb354453 DG |
644 | } |
645 | ||
d9800920 DG |
646 | /* |
647 | * Register an outside consumer. | |
9ae110e2 | 648 | * |
1c8d13c8 | 649 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
650 | */ |
651 | int lttng_register_consumer(struct lttng_handle *handle, | |
652 | const char *socket_path) | |
653 | { | |
654 | struct lttcomm_session_msg lsm; | |
655 | ||
2f70b271 DG |
656 | if (handle == NULL || socket_path == NULL) { |
657 | return -LTTNG_ERR_INVALID; | |
658 | } | |
659 | ||
53efb85a | 660 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 661 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 662 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 663 | sizeof(lsm.session.name)); |
60160d2a | 664 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 665 | |
9ae110e2 JG |
666 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
667 | sizeof(lsm.u.reg.path)); | |
d9800920 | 668 | |
cac3069d | 669 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
670 | } |
671 | ||
1df4dedd | 672 | /* |
9ae110e2 JG |
673 | * Start tracing for all traces of the session. |
674 | * | |
675 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 676 | */ |
6a4f824d | 677 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 678 | { |
cd80958d DG |
679 | struct lttcomm_session_msg lsm; |
680 | ||
6a4f824d | 681 | if (session_name == NULL) { |
2f70b271 | 682 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
683 | } |
684 | ||
53efb85a | 685 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 686 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 687 | |
cac3069d DG |
688 | lttng_ctl_copy_string(lsm.session.name, session_name, |
689 | sizeof(lsm.session.name)); | |
cd80958d | 690 | |
cac3069d | 691 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 692 | } |
1df4dedd DG |
693 | |
694 | /* | |
38ee087f | 695 | * Stop tracing for all traces of the session. |
f3ed775e | 696 | */ |
38ee087f | 697 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 698 | { |
38ee087f | 699 | int ret, data_ret; |
cd80958d DG |
700 | struct lttcomm_session_msg lsm; |
701 | ||
6a4f824d | 702 | if (session_name == NULL) { |
2f70b271 | 703 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
704 | } |
705 | ||
53efb85a | 706 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 707 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 708 | |
cac3069d DG |
709 | lttng_ctl_copy_string(lsm.session.name, session_name, |
710 | sizeof(lsm.session.name)); | |
cd80958d | 711 | |
cac3069d | 712 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
713 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
714 | goto error; | |
715 | } | |
716 | ||
717 | if (!wait) { | |
718 | goto end; | |
719 | } | |
720 | ||
38ee087f DG |
721 | /* Check for data availability */ |
722 | do { | |
6d805429 | 723 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
724 | if (data_ret < 0) { |
725 | /* Return the data available call error. */ | |
726 | ret = data_ret; | |
727 | goto error; | |
728 | } | |
729 | ||
730 | /* | |
9ae110e2 JG |
731 | * Data sleep time before retrying (in usec). Don't sleep if the |
732 | * call returned value indicates availability. | |
38ee087f | 733 | */ |
6d805429 | 734 | if (data_ret) { |
c8f61fd4 | 735 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 736 | } |
6d805429 | 737 | } while (data_ret != 0); |
38ee087f | 738 | |
38ee087f DG |
739 | end: |
740 | error: | |
741 | return ret; | |
742 | } | |
743 | ||
744 | /* | |
745 | * Stop tracing and wait for data availability. | |
746 | */ | |
747 | int lttng_stop_tracing(const char *session_name) | |
748 | { | |
749 | return _lttng_stop_tracing(session_name, 1); | |
750 | } | |
751 | ||
752 | /* | |
753 | * Stop tracing but _don't_ wait for data availability. | |
754 | */ | |
755 | int lttng_stop_tracing_no_wait(const char *session_name) | |
756 | { | |
757 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
758 | } |
759 | ||
760 | /* | |
601d5acf DG |
761 | * Add context to a channel. |
762 | * | |
763 | * If the given channel is NULL, add the contexts to all channels. | |
764 | * The event_name param is ignored. | |
af87c45a DG |
765 | * |
766 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 767 | */ |
cd80958d | 768 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
769 | struct lttng_event_context *ctx, const char *event_name, |
770 | const char *channel_name) | |
d65106b1 | 771 | { |
2001793c JG |
772 | int ret; |
773 | size_t len = 0; | |
774 | char *buf = NULL; | |
cd80958d DG |
775 | struct lttcomm_session_msg lsm; |
776 | ||
9ae110e2 | 777 | /* Safety check. Both are mandatory. */ |
9d697d3d | 778 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
779 | ret = -LTTNG_ERR_INVALID; |
780 | goto end; | |
cd80958d DG |
781 | } |
782 | ||
441c16a7 | 783 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
784 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
785 | ||
85076754 MD |
786 | /* If no channel name, send empty string. */ |
787 | if (channel_name == NULL) { | |
788 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
789 | sizeof(lsm.u.context.channel_name)); | |
790 | } else { | |
791 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
792 | sizeof(lsm.u.context.channel_name)); | |
793 | } | |
cd80958d | 794 | |
60160d2a | 795 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cac3069d | 796 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
797 | sizeof(lsm.session.name)); |
798 | ||
2001793c JG |
799 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
800 | size_t provider_len, ctx_len; | |
801 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
802 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
803 | ||
804 | if (!provider_name || !ctx_name) { | |
805 | ret = -LTTNG_ERR_INVALID; | |
806 | goto end; | |
807 | } | |
808 | ||
809 | provider_len = strlen(provider_name); | |
810 | if (provider_len == 0) { | |
811 | ret = -LTTNG_ERR_INVALID; | |
812 | goto end; | |
813 | } | |
814 | lsm.u.context.provider_name_len = provider_len; | |
815 | ||
816 | ctx_len = strlen(ctx_name); | |
817 | if (ctx_len == 0) { | |
818 | ret = -LTTNG_ERR_INVALID; | |
819 | goto end; | |
820 | } | |
821 | lsm.u.context.context_name_len = ctx_len; | |
822 | ||
823 | len = provider_len + ctx_len; | |
824 | buf = zmalloc(len); | |
825 | if (!buf) { | |
826 | ret = -LTTNG_ERR_NOMEM; | |
827 | goto end; | |
828 | } | |
829 | ||
830 | memcpy(buf, provider_name, provider_len); | |
831 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
832 | } | |
833 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
834 | |
835 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
836 | /* | |
837 | * Don't leak application addresses to the sessiond. | |
838 | * This is only necessary when ctx is for an app ctx otherwise | |
839 | * the values inside the union (type & config) are overwritten. | |
840 | */ | |
841 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
842 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
843 | } | |
2001793c | 844 | |
795a978d | 845 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
846 | end: |
847 | free(buf); | |
848 | return ret; | |
d65106b1 DG |
849 | } |
850 | ||
f3ed775e | 851 | /* |
9ae110e2 JG |
852 | * Enable event(s) for a channel. |
853 | * | |
854 | * If no event name is specified, all events are enabled. | |
855 | * If no channel name is specified, the default 'channel0' is used. | |
856 | * | |
857 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 858 | */ |
cd80958d | 859 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 860 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 861 | { |
f8a96544 JI |
862 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
863 | NULL, 0, NULL); | |
1df4dedd DG |
864 | } |
865 | ||
53a80697 | 866 | /* |
025faf73 | 867 | * Create or enable an event with a filter expression. |
178191b3 | 868 | * |
53a80697 MD |
869 | * Return negative error value on error. |
870 | * Return size of returned session payload data if OK. | |
871 | */ | |
025faf73 | 872 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 873 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
874 | const char *filter_expression) |
875 | { | |
f8a96544 JI |
876 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
877 | filter_expression, 0, NULL); | |
53a80697 MD |
878 | } |
879 | ||
347c5ab5 | 880 | /* |
0e115563 | 881 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
882 | * NULL if not applicable. |
883 | * | |
884 | * An event with NO loglevel and the name is * will return NULL. | |
885 | */ | |
0e115563 | 886 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
887 | { |
888 | int err; | |
0e115563 | 889 | char *agent_filter = NULL; |
347c5ab5 DG |
890 | |
891 | assert(ev); | |
892 | ||
893 | /* Don't add filter for the '*' event. */ | |
9f449915 | 894 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 895 | if (filter) { |
0e115563 | 896 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
897 | ev->name); |
898 | } else { | |
0e115563 | 899 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
900 | } |
901 | if (err < 0) { | |
902 | PERROR("asprintf"); | |
6a556f7b | 903 | goto error; |
347c5ab5 DG |
904 | } |
905 | } | |
906 | ||
907 | /* Add loglevel filtering if any for the JUL domain. */ | |
908 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
909 | char *op; | |
910 | ||
911 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
912 | op = ">="; | |
913 | } else { | |
914 | op = "=="; | |
915 | } | |
916 | ||
0e115563 | 917 | if (filter || agent_filter) { |
6a556f7b JG |
918 | char *new_filter; |
919 | ||
fb0edb23 | 920 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 921 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 922 | ev->loglevel); |
0e115563 DG |
923 | if (agent_filter) { |
924 | free(agent_filter); | |
6a556f7b | 925 | } |
0e115563 | 926 | agent_filter = new_filter; |
347c5ab5 | 927 | } else { |
0e115563 | 928 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
929 | ev->loglevel); |
930 | } | |
931 | if (err < 0) { | |
932 | PERROR("asprintf"); | |
6a556f7b | 933 | goto error; |
347c5ab5 DG |
934 | } |
935 | } | |
936 | ||
0e115563 | 937 | return agent_filter; |
6a556f7b | 938 | error: |
0e115563 | 939 | free(agent_filter); |
6a556f7b | 940 | return NULL; |
347c5ab5 DG |
941 | } |
942 | ||
137b9942 | 943 | /* |
ec166985 | 944 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
945 | * newly allocated parser context in ctxp and populate the lsm object with the |
946 | * expression len. | |
947 | * | |
948 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
949 | */ | |
950 | static int generate_filter(char *filter_expression, | |
951 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
952 | { | |
953 | int ret; | |
954 | struct filter_parser_ctx *ctx = NULL; | |
955 | FILE *fmem = NULL; | |
956 | ||
957 | assert(filter_expression); | |
958 | assert(lsm); | |
959 | assert(ctxp); | |
960 | ||
961 | /* | |
962 | * Casting const to non-const, as the underlying function will use it in | |
963 | * read-only mode. | |
964 | */ | |
965 | fmem = lttng_fmemopen((void *) filter_expression, | |
966 | strlen(filter_expression), "r"); | |
967 | if (!fmem) { | |
968 | fprintf(stderr, "Error opening memory as stream\n"); | |
969 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
970 | goto error; | |
971 | } | |
972 | ctx = filter_parser_ctx_alloc(fmem); | |
973 | if (!ctx) { | |
974 | fprintf(stderr, "Error allocating parser\n"); | |
975 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
976 | goto filter_alloc_error; | |
977 | } | |
978 | ret = filter_parser_ctx_append_ast(ctx); | |
979 | if (ret) { | |
980 | fprintf(stderr, "Parse error\n"); | |
981 | ret = -LTTNG_ERR_FILTER_INVAL; | |
982 | goto parse_error; | |
983 | } | |
137b9942 DG |
984 | if (print_xml) { |
985 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
986 | if (ret) { | |
987 | fflush(stdout); | |
988 | fprintf(stderr, "XML print error\n"); | |
989 | ret = -LTTNG_ERR_FILTER_INVAL; | |
990 | goto parse_error; | |
991 | } | |
992 | } | |
993 | ||
994 | dbg_printf("Generating IR... "); | |
995 | fflush(stdout); | |
996 | ret = filter_visitor_ir_generate(ctx); | |
997 | if (ret) { | |
998 | fprintf(stderr, "Generate IR error\n"); | |
999 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1000 | goto parse_error; | |
1001 | } | |
1002 | dbg_printf("done\n"); | |
1003 | ||
1004 | dbg_printf("Validating IR... "); | |
1005 | fflush(stdout); | |
1006 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
1007 | if (ret) { | |
1008 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1009 | goto parse_error; | |
1010 | } | |
9f449915 PP |
1011 | |
1012 | /* Normalize globbing patterns in the expression. */ | |
1013 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
1014 | if (ret) { | |
1015 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1016 | goto parse_error; | |
1017 | } | |
1018 | ||
9ae110e2 | 1019 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
1020 | ret = filter_visitor_ir_validate_string(ctx); |
1021 | if (ret) { | |
1022 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1023 | goto parse_error; | |
1024 | } | |
9f449915 PP |
1025 | |
1026 | /* Validate globbing patterns in the expression. */ | |
1027 | ret = filter_visitor_ir_validate_globbing(ctx); | |
1028 | if (ret) { | |
1029 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1030 | goto parse_error; | |
1031 | } | |
1032 | ||
137b9942 DG |
1033 | dbg_printf("done\n"); |
1034 | ||
1035 | dbg_printf("Generating bytecode... "); | |
1036 | fflush(stdout); | |
1037 | ret = filter_visitor_bytecode_generate(ctx); | |
1038 | if (ret) { | |
1039 | fprintf(stderr, "Generate bytecode error\n"); | |
1040 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1041 | goto parse_error; | |
1042 | } | |
1043 | dbg_printf("done\n"); | |
1044 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
1045 | bytecode_get_len(&ctx->bytecode->b)); | |
1046 | ||
1047 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1048 | + bytecode_get_len(&ctx->bytecode->b); | |
1049 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
1050 | ||
1051 | /* No need to keep the memory stream. */ | |
1052 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1053 | PERROR("fclose"); |
137b9942 DG |
1054 | } |
1055 | ||
1056 | *ctxp = ctx; | |
1057 | return 0; | |
1058 | ||
1059 | parse_error: | |
137b9942 DG |
1060 | filter_ir_free(ctx); |
1061 | filter_parser_ctx_free(ctx); | |
1062 | filter_alloc_error: | |
1063 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1064 | PERROR("fclose"); |
137b9942 DG |
1065 | } |
1066 | error: | |
1067 | return ret; | |
1068 | } | |
1069 | ||
93deb080 JI |
1070 | /* |
1071 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1072 | * If no event name is specified, all events are enabled. | |
1073 | * If no channel name is specified, the default name is used. | |
1074 | * If filter expression is not NULL, the filter is set for the event. | |
1075 | * If exclusion count is not zero, the exclusions are set for the event. | |
1076 | * Returns size of returned session payload data or a negative error code. | |
1077 | */ | |
1078 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1079 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1080 | const char *original_filter_expression, |
93deb080 JI |
1081 | int exclusion_count, char **exclusion_list) |
1082 | { | |
1083 | struct lttcomm_session_msg lsm; | |
15e37663 JG |
1084 | struct lttng_dynamic_buffer send_buffer; |
1085 | int ret = 0, i, fd_to_send = -1; | |
1086 | bool send_fd = false; | |
137b9942 | 1087 | unsigned int free_filter_expression = 0; |
93deb080 | 1088 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1089 | |
6a0838b7 YL |
1090 | /* |
1091 | * We have either a filter or some exclusions, so we need to set up | |
1092 | * a variable-length memory block from where to send the data. | |
1093 | */ | |
1094 | lttng_dynamic_buffer_init(&send_buffer); | |
ec005ec6 | 1095 | |
e9efbcd3 JG |
1096 | /* |
1097 | * Cast as non-const since we may replace the filter expression | |
1098 | * by a dynamically allocated string. Otherwise, the original | |
1099 | * string is not modified. | |
1100 | */ | |
1101 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1102 | |
1103 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1104 | ret = -LTTNG_ERR_INVALID; |
1105 | goto error; | |
93deb080 JI |
1106 | } |
1107 | ||
9ae110e2 JG |
1108 | /* |
1109 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1110 | * anyway, so treat this corner-case early to eliminate |
1111 | * lttng_fmemopen error for 0-byte allocation. | |
1112 | */ | |
1113 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1114 | ret = -LTTNG_ERR_INVALID; |
1115 | goto error; | |
93deb080 JI |
1116 | } |
1117 | ||
1118 | memset(&lsm, 0, sizeof(lsm)); | |
1119 | ||
1120 | /* If no channel name, send empty string. */ | |
1121 | if (channel_name == NULL) { | |
1122 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1123 | sizeof(lsm.u.enable.channel_name)); | |
1124 | } else { | |
1125 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1126 | sizeof(lsm.u.enable.channel_name)); | |
1127 | } | |
1128 | ||
18a720cd MD |
1129 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1130 | if (ev->name[0] == '\0') { | |
1131 | /* Enable all events */ | |
1132 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1133 | } |
93deb080 | 1134 | |
60160d2a | 1135 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1136 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1137 | ||
1138 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1139 | sizeof(lsm.session.name)); | |
1140 | lsm.u.enable.exclusion_count = exclusion_count; | |
1141 | lsm.u.enable.bytecode_len = 0; | |
1142 | ||
9ae110e2 | 1143 | /* Parse filter expression. */ |
5cdb6027 | 1144 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1145 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1146 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1147 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1148 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1149 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1150 | char *agent_filter; | |
64226865 | 1151 | |
347c5ab5 | 1152 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1153 | agent_filter = set_agent_filter(filter_expression, ev); |
1154 | if (!agent_filter) { | |
137b9942 | 1155 | if (!filter_expression) { |
9ae110e2 JG |
1156 | /* |
1157 | * No JUL and no filter, just skip | |
1158 | * everything below. | |
1159 | */ | |
137b9942 DG |
1160 | goto ask_sessiond; |
1161 | } | |
64226865 DG |
1162 | } else { |
1163 | /* | |
9ae110e2 JG |
1164 | * With an agent filter, the original filter has |
1165 | * been added to it thus replace the filter | |
1166 | * expression. | |
64226865 | 1167 | */ |
0e115563 | 1168 | filter_expression = agent_filter; |
e9efbcd3 | 1169 | free_filter_expression = 1; |
9b21e6d5 | 1170 | } |
9b21e6d5 | 1171 | } |
93deb080 | 1172 | |
137b9942 | 1173 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1174 | if (ret) { |
137b9942 | 1175 | goto filter_error; |
93deb080 | 1176 | } |
6b453b5e JG |
1177 | } |
1178 | ||
15e37663 JG |
1179 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1180 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1181 | + lsm.u.enable.expression_len |
1182 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1183 | if (ret) { |
6b453b5e | 1184 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1185 | goto mem_error; |
6b453b5e | 1186 | } |
137b9942 | 1187 | |
9ae110e2 | 1188 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1189 | for (i = 0; i < exclusion_count; i++) { |
1190 | size_t exclusion_len; | |
1191 | ||
1192 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1193 | LTTNG_SYMBOL_NAME_LEN); | |
1194 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1195 | /* Exclusion is not NULL-terminated. */ | |
1196 | ret = -LTTNG_ERR_INVALID; | |
1197 | goto mem_error; | |
1198 | } | |
1199 | ||
1200 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1201 | *(exclusion_list + i), | |
1202 | LTTNG_SYMBOL_NAME_LEN); | |
1203 | if (ret) { | |
1204 | goto mem_error; | |
1205 | } | |
6b453b5e | 1206 | } |
15e37663 | 1207 | |
9ae110e2 | 1208 | /* Add filter expression next. */ |
15e37663 JG |
1209 | if (filter_expression) { |
1210 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1211 | filter_expression, lsm.u.enable.expression_len); | |
1212 | if (ret) { | |
1213 | goto mem_error; | |
1214 | } | |
6b453b5e | 1215 | } |
9ae110e2 | 1216 | /* Add filter bytecode next. */ |
137b9942 | 1217 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1218 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1219 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1220 | if (ret) { | |
1221 | goto mem_error; | |
1222 | } | |
1223 | } | |
1224 | if (ev->extended.ptr) { | |
1225 | struct lttng_event_extended *ev_ext = | |
1226 | (struct lttng_event_extended *) ev->extended.ptr; | |
1227 | ||
1228 | if (ev_ext->probe_location) { | |
1229 | /* | |
1230 | * lttng_userspace_probe_location_serialize returns the | |
1231 | * number of bytes that was appended to the buffer. | |
1232 | */ | |
1233 | ret = lttng_userspace_probe_location_serialize( | |
1234 | ev_ext->probe_location, &send_buffer, | |
1235 | &fd_to_send); | |
56f0bc67 | 1236 | if (ret < 0) { |
15e37663 JG |
1237 | goto mem_error; |
1238 | } | |
1239 | ||
1240 | send_fd = fd_to_send >= 0; | |
1241 | /* | |
1242 | * Set the size of the userspace probe location element | |
1243 | * of the buffer so that the receiving side knows where | |
1244 | * to split it. | |
1245 | */ | |
1246 | lsm.u.enable.userspace_probe_location_len = ret; | |
1247 | } | |
93deb080 JI |
1248 | } |
1249 | ||
15e37663 JG |
1250 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1251 | send_fd ? &fd_to_send : NULL, | |
1252 | send_fd ? 1 : 0, | |
1253 | send_buffer.size ? send_buffer.data : NULL, | |
1254 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1255 | |
7ca1dc6f DG |
1256 | mem_error: |
1257 | if (filter_expression && ctx) { | |
93deb080 JI |
1258 | filter_bytecode_free(ctx); |
1259 | filter_ir_free(ctx); | |
1260 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1261 | } |
1262 | filter_error: | |
1263 | if (free_filter_expression) { | |
1264 | /* | |
9ae110e2 JG |
1265 | * The filter expression has been replaced and must be freed as |
1266 | * it is not the original filter expression received as a | |
1267 | * parameter. | |
7ca1dc6f DG |
1268 | */ |
1269 | free(filter_expression); | |
93deb080 | 1270 | } |
137b9942 DG |
1271 | error: |
1272 | /* | |
9ae110e2 JG |
1273 | * Return directly to the caller and don't ask the sessiond since |
1274 | * something went wrong in the parsing of data above. | |
137b9942 | 1275 | */ |
15e37663 | 1276 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1277 | return ret; |
3e1c9ff7 DG |
1278 | |
1279 | ask_sessiond: | |
1280 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1281 | return ret; | |
93deb080 JI |
1282 | } |
1283 | ||
6e911cad MD |
1284 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1285 | struct lttng_event *ev, const char *channel_name, | |
1286 | const char *original_filter_expression) | |
1df4dedd | 1287 | { |
cd80958d | 1288 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1289 | char *varlen_data; |
1290 | int ret = 0; | |
1291 | unsigned int free_filter_expression = 0; | |
1292 | struct filter_parser_ctx *ctx = NULL; | |
1293 | /* | |
1294 | * Cast as non-const since we may replace the filter expression | |
1295 | * by a dynamically allocated string. Otherwise, the original | |
1296 | * string is not modified. | |
1297 | */ | |
1298 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1299 | |
6e911cad MD |
1300 | if (handle == NULL || ev == NULL) { |
1301 | ret = -LTTNG_ERR_INVALID; | |
1302 | goto error; | |
1303 | } | |
1304 | ||
9ae110e2 JG |
1305 | /* |
1306 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1307 | * anyway, so treat this corner-case early to eliminate |
1308 | * lttng_fmemopen error for 0-byte allocation. | |
1309 | */ | |
1310 | if (filter_expression && filter_expression[0] == '\0') { | |
1311 | ret = -LTTNG_ERR_INVALID; | |
1312 | goto error; | |
cd80958d DG |
1313 | } |
1314 | ||
441c16a7 MD |
1315 | memset(&lsm, 0, sizeof(lsm)); |
1316 | ||
85076754 MD |
1317 | /* If no channel name, send empty string. */ |
1318 | if (channel_name == NULL) { | |
1319 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1320 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1321 | } else { |
85076754 | 1322 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1323 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1324 | } |
1325 | ||
18a720cd | 1326 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1327 | |
60160d2a | 1328 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1329 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1330 | ||
cac3069d | 1331 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1332 | sizeof(lsm.session.name)); |
6e911cad | 1333 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1334 | |
6e911cad MD |
1335 | /* |
1336 | * For the JUL domain, a filter is enforced except for the | |
1337 | * disable all event. This is done to avoid having the event in | |
1338 | * all sessions thus filtering by logger name. | |
1339 | */ | |
1340 | if (filter_expression == NULL && | |
1341 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1342 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1343 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1344 | goto ask_sessiond; |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * We have a filter, so we need to set up a variable-length | |
1349 | * memory block from where to send the data. | |
1350 | */ | |
1351 | ||
1352 | /* Parse filter expression */ | |
1353 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1354 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1355 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1356 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1357 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1358 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1359 | char *agent_filter; | |
6e911cad MD |
1360 | |
1361 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1362 | agent_filter = set_agent_filter(filter_expression, ev); |
1363 | if (!agent_filter) { | |
6e911cad | 1364 | if (!filter_expression) { |
9ae110e2 JG |
1365 | /* |
1366 | * No JUL and no filter, just skip | |
1367 | * everything below. | |
1368 | */ | |
6e911cad MD |
1369 | goto ask_sessiond; |
1370 | } | |
1371 | } else { | |
1372 | /* | |
9ae110e2 JG |
1373 | * With a JUL filter, the original filter has |
1374 | * been added to it thus replace the filter | |
1375 | * expression. | |
6e911cad | 1376 | */ |
0e115563 | 1377 | filter_expression = agent_filter; |
6e911cad MD |
1378 | free_filter_expression = 1; |
1379 | } | |
1380 | } | |
1381 | ||
1382 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1383 | if (ret) { | |
1384 | goto filter_error; | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1389 | + lsm.u.disable.expression_len); | |
1390 | if (!varlen_data) { | |
1391 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1392 | goto mem_error; | |
1393 | } | |
1394 | ||
9ae110e2 | 1395 | /* Add filter expression. */ |
6e911cad MD |
1396 | if (lsm.u.disable.expression_len != 0) { |
1397 | memcpy(varlen_data, | |
1398 | filter_expression, | |
1399 | lsm.u.disable.expression_len); | |
1400 | } | |
9ae110e2 | 1401 | /* Add filter bytecode next. */ |
6e911cad MD |
1402 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1403 | memcpy(varlen_data | |
1404 | + lsm.u.disable.expression_len, | |
1405 | &ctx->bytecode->b, | |
1406 | lsm.u.disable.bytecode_len); | |
1407 | } | |
1408 | ||
795a978d | 1409 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1410 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1411 | free(varlen_data); | |
1412 | ||
1413 | mem_error: | |
1414 | if (filter_expression && ctx) { | |
1415 | filter_bytecode_free(ctx); | |
1416 | filter_ir_free(ctx); | |
1417 | filter_parser_ctx_free(ctx); | |
1418 | } | |
1419 | filter_error: | |
1420 | if (free_filter_expression) { | |
1421 | /* | |
9ae110e2 JG |
1422 | * The filter expression has been replaced and must be freed as |
1423 | * it is not the original filter expression received as a | |
1424 | * parameter. | |
6e911cad MD |
1425 | */ |
1426 | free(filter_expression); | |
1427 | } | |
1428 | error: | |
1429 | /* | |
9ae110e2 JG |
1430 | * Return directly to the caller and don't ask the sessiond since |
1431 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1432 | */ |
1433 | return ret; | |
1434 | ||
1435 | ask_sessiond: | |
1436 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1437 | return ret; | |
1438 | } | |
1439 | ||
1440 | /* | |
9ae110e2 JG |
1441 | * Disable event(s) of a channel and domain. |
1442 | * If no event name is specified, all events are disabled. | |
1443 | * If no channel name is specified, the default 'channel0' is used. | |
1444 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1445 | */ |
1446 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1447 | const char *channel_name) | |
1448 | { | |
1449 | struct lttng_event ev; | |
1450 | ||
1451 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1452 | ev.loglevel = -1; |
6e911cad MD |
1453 | ev.type = LTTNG_EVENT_ALL; |
1454 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1455 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1456 | } |
1457 | ||
cf0bcb51 JG |
1458 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1459 | { | |
1460 | struct lttng_channel *channel = NULL; | |
1461 | struct lttng_channel_extended *extended = NULL; | |
1462 | ||
1463 | if (!domain) { | |
1464 | goto error; | |
1465 | } | |
1466 | ||
1467 | /* Validate domain. */ | |
1468 | switch (domain->type) { | |
1469 | case LTTNG_DOMAIN_UST: | |
1470 | switch (domain->buf_type) { | |
1471 | case LTTNG_BUFFER_PER_UID: | |
1472 | case LTTNG_BUFFER_PER_PID: | |
1473 | break; | |
1474 | default: | |
1475 | goto error; | |
1476 | } | |
1477 | break; | |
1478 | case LTTNG_DOMAIN_KERNEL: | |
1479 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1480 | goto error; | |
1481 | } | |
1482 | break; | |
1483 | default: | |
1484 | goto error; | |
1485 | } | |
1486 | ||
1487 | channel = zmalloc(sizeof(*channel)); | |
1488 | if (!channel) { | |
1489 | goto error; | |
1490 | } | |
1491 | ||
1492 | extended = zmalloc(sizeof(*extended)); | |
1493 | if (!extended) { | |
1494 | goto error; | |
1495 | } | |
1496 | ||
1497 | channel->attr.extended.ptr = extended; | |
1498 | ||
1499 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1500 | return channel; | |
1501 | error: | |
1502 | free(channel); | |
1503 | free(extended); | |
1504 | return NULL; | |
1505 | } | |
1506 | ||
1507 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1508 | { | |
1509 | if (!channel) { | |
1510 | return; | |
1511 | } | |
1512 | ||
1513 | if (channel->attr.extended.ptr) { | |
1514 | free(channel->attr.extended.ptr); | |
1515 | } | |
1516 | free(channel); | |
1517 | } | |
1518 | ||
1df4dedd | 1519 | /* |
9ae110e2 JG |
1520 | * Enable channel per domain |
1521 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1522 | */ |
cd80958d | 1523 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1524 | struct lttng_channel *in_chan) |
a5c5a2bd | 1525 | { |
cd80958d | 1526 | struct lttcomm_session_msg lsm; |
09b72f7a | 1527 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1528 | |
9ae110e2 | 1529 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1530 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1531 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1532 | } |
1533 | ||
441c16a7 | 1534 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1535 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1536 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1537 | |
cf0bcb51 JG |
1538 | if (!in_chan->attr.extended.ptr) { |
1539 | struct lttng_channel *channel; | |
1540 | struct lttng_channel_extended *extended; | |
7d29a247 | 1541 | |
cf0bcb51 JG |
1542 | channel = lttng_channel_create(&handle->domain); |
1543 | if (!channel) { | |
1544 | return -LTTNG_ERR_NOMEM; | |
1545 | } | |
1546 | ||
1547 | /* | |
1548 | * Create a new channel in order to use default extended | |
1549 | * attribute values. | |
1550 | */ | |
1551 | extended = (struct lttng_channel_extended *) | |
1552 | channel->attr.extended.ptr; | |
1553 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1554 | lttng_channel_destroy(channel); | |
1555 | } else { | |
1556 | struct lttng_channel_extended *extended; | |
1557 | ||
1558 | extended = (struct lttng_channel_extended *) | |
1559 | in_chan->attr.extended.ptr; | |
1560 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1561 | } | |
cd80958d | 1562 | |
09b72f7a FD |
1563 | /* |
1564 | * Verify that the amount of memory required to create the requested | |
1565 | * buffer is available on the system at the moment. | |
1566 | */ | |
1567 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1568 | lsm.u.channel.chan.attr.subbuf_size; | |
1569 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1570 | return -LTTNG_ERR_NOMEM; | |
1571 | } | |
1572 | ||
cf0bcb51 | 1573 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1574 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1575 | |
cac3069d | 1576 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1577 | sizeof(lsm.session.name)); |
1578 | ||
cac3069d | 1579 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1580 | } |
1df4dedd | 1581 | |
2ef84c95 | 1582 | /* |
9ae110e2 JG |
1583 | * All tracing will be stopped for registered events of the channel. |
1584 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1585 | */ |
cd80958d | 1586 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1587 | { |
cd80958d DG |
1588 | struct lttcomm_session_msg lsm; |
1589 | ||
9ae110e2 | 1590 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1591 | if (handle == NULL || name == NULL) { |
2f70b271 | 1592 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1593 | } |
1594 | ||
441c16a7 MD |
1595 | memset(&lsm, 0, sizeof(lsm)); |
1596 | ||
cd80958d | 1597 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1598 | |
cac3069d | 1599 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1600 | sizeof(lsm.u.disable.channel_name)); |
1601 | ||
60160d2a | 1602 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1603 | |
cac3069d | 1604 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1605 | sizeof(lsm.session.name)); |
1606 | ||
cac3069d | 1607 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1608 | } |
1609 | ||
fac6795d | 1610 | /* |
9ae110e2 JG |
1611 | * Lists all available tracepoints of domain. |
1612 | * Sets the contents of the events array. | |
1613 | * Returns the number of lttng_event entries in events; | |
1614 | * on error, returns a negative value. | |
fac6795d | 1615 | */ |
cd80958d | 1616 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1617 | struct lttng_event **events) |
fac6795d | 1618 | { |
052da939 | 1619 | int ret; |
cd80958d DG |
1620 | struct lttcomm_session_msg lsm; |
1621 | ||
9d697d3d | 1622 | if (handle == NULL) { |
2f70b271 | 1623 | return -LTTNG_ERR_INVALID; |
cd80958d | 1624 | } |
fac6795d | 1625 | |
53efb85a | 1626 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1627 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1628 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1629 | |
cac3069d | 1630 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1631 | if (ret < 0) { |
1632 | return ret; | |
eb354453 | 1633 | } |
fac6795d | 1634 | |
9f19cc17 | 1635 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1636 | } |
1637 | ||
f37d259d | 1638 | /* |
9ae110e2 JG |
1639 | * Lists all available tracepoint fields of domain. |
1640 | * Sets the contents of the event field array. | |
1641 | * Returns the number of lttng_event_field entries in events; | |
1642 | * on error, returns a negative value. | |
f37d259d MD |
1643 | */ |
1644 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1645 | struct lttng_event_field **fields) | |
1646 | { | |
1647 | int ret; | |
1648 | struct lttcomm_session_msg lsm; | |
1649 | ||
1650 | if (handle == NULL) { | |
2f70b271 | 1651 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1652 | } |
1653 | ||
53efb85a | 1654 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1655 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1656 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1657 | |
cac3069d | 1658 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1659 | if (ret < 0) { |
1660 | return ret; | |
1661 | } | |
1662 | ||
1663 | return ret / sizeof(struct lttng_event_field); | |
1664 | } | |
1665 | ||
834978fd | 1666 | /* |
9ae110e2 JG |
1667 | * Lists all available kernel system calls. Allocates and sets the contents of |
1668 | * the events array. | |
834978fd | 1669 | * |
9ae110e2 JG |
1670 | * Returns the number of lttng_event entries in events; on error, returns a |
1671 | * negative value. | |
834978fd DG |
1672 | */ |
1673 | int lttng_list_syscalls(struct lttng_event **events) | |
1674 | { | |
1675 | int ret; | |
1676 | struct lttcomm_session_msg lsm; | |
1677 | ||
1678 | if (!events) { | |
1679 | return -LTTNG_ERR_INVALID; | |
1680 | } | |
1681 | ||
1682 | memset(&lsm, 0, sizeof(lsm)); | |
1683 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1684 | /* Force kernel domain for system calls. */ | |
1685 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1686 | ||
1687 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1688 | if (ret < 0) { | |
1689 | return ret; | |
1690 | } | |
1691 | ||
1692 | return ret / sizeof(struct lttng_event); | |
1693 | } | |
1694 | ||
1657e9bb | 1695 | /* |
9ae110e2 JG |
1696 | * Returns a human readable string describing |
1697 | * the error code (a negative value). | |
1657e9bb | 1698 | */ |
9a745bc7 | 1699 | const char *lttng_strerror(int code) |
1657e9bb | 1700 | { |
f73fabfd | 1701 | return error_get_str(code); |
1657e9bb DG |
1702 | } |
1703 | ||
b178f53e JG |
1704 | enum lttng_error_code lttng_create_session_ext( |
1705 | struct lttng_session_descriptor *session_descriptor) | |
1706 | { | |
1707 | enum lttng_error_code ret_code; | |
1708 | struct lttcomm_session_msg lsm = { | |
1709 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1710 | }; | |
1711 | void *reply = NULL; | |
1712 | struct lttng_buffer_view reply_view; | |
1713 | int reply_ret; | |
1714 | bool sessiond_must_generate_ouput; | |
1715 | struct lttng_dynamic_buffer payload; | |
1716 | int ret; | |
1717 | size_t descriptor_size; | |
1718 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1719 | ||
1720 | lttng_dynamic_buffer_init(&payload); | |
1721 | if (!session_descriptor) { | |
1722 | ret_code = LTTNG_ERR_INVALID; | |
1723 | goto end; | |
1724 | } | |
1725 | ||
1726 | sessiond_must_generate_ouput = | |
1727 | !lttng_session_descriptor_is_output_destination_initialized( | |
1728 | session_descriptor); | |
1729 | if (sessiond_must_generate_ouput) { | |
1730 | const char *home_dir = utils_get_home_dir(); | |
1731 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1732 | ||
1733 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1734 | ret_code = LTTNG_ERR_FATAL; | |
1735 | goto end; | |
1736 | } | |
1737 | ||
1738 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1739 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1740 | home_dir_len); | |
1741 | if (ret) { | |
1742 | ret_code = LTTNG_ERR_NOMEM; | |
1743 | goto end; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | descriptor_size = payload.size; | |
1748 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1749 | &payload); | |
1750 | if (ret) { | |
1751 | ret_code = LTTNG_ERR_INVALID; | |
1752 | goto end; | |
1753 | } | |
1754 | descriptor_size = payload.size - descriptor_size; | |
1755 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1756 | ||
1757 | /* Command returns a session descriptor on success. */ | |
1758 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1759 | payload.size, &reply); | |
1760 | if (reply_ret < 0) { | |
1761 | ret_code = -reply_ret; | |
1762 | goto end; | |
1763 | } else if (reply_ret == 0) { | |
1764 | /* Socket unexpectedly closed by the session daemon. */ | |
1765 | ret_code = LTTNG_ERR_FATAL; | |
1766 | goto end; | |
1767 | } | |
1768 | ||
1769 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1770 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1771 | &descriptor_reply); | |
1772 | if (ret < 0) { | |
1773 | ret_code = LTTNG_ERR_FATAL; | |
1774 | goto end; | |
1775 | } | |
1776 | ret_code = LTTNG_OK; | |
1777 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1778 | end: | |
1779 | free(reply); | |
1780 | lttng_dynamic_buffer_reset(&payload); | |
1781 | lttng_session_descriptor_destroy(descriptor_reply); | |
1782 | return ret_code; | |
1783 | } | |
1784 | ||
aaf97519 | 1785 | /* |
b178f53e | 1786 | * Create a new session using name and url for destination. |
a4b92340 | 1787 | * |
780d4bb8 | 1788 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1789 | */ |
a4b92340 | 1790 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1791 | { |
3dd05a85 | 1792 | int ret; |
a4b92340 | 1793 | ssize_t size; |
a4b92340 | 1794 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1795 | struct lttng_session_descriptor *descriptor = NULL; |
1796 | enum lttng_error_code ret_code; | |
00e2e675 | 1797 | |
b178f53e JG |
1798 | if (!name) { |
1799 | ret = -LTTNG_ERR_INVALID; | |
1800 | goto end; | |
00e2e675 DG |
1801 | } |
1802 | ||
bc894455 | 1803 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1804 | if (size < 0) { |
b178f53e JG |
1805 | ret = -LTTNG_ERR_INVALID; |
1806 | goto end; | |
1807 | } | |
1808 | switch (size) { | |
1809 | case 0: | |
1810 | descriptor = lttng_session_descriptor_create(name); | |
1811 | break; | |
1812 | case 1: | |
1813 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1814 | ret = -LTTNG_ERR_INVALID; | |
1815 | goto end; | |
1816 | } | |
1817 | descriptor = lttng_session_descriptor_local_create(name, | |
1818 | uris[0].dst.path); | |
1819 | break; | |
1820 | case 2: | |
1821 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1822 | NULL); | |
1823 | break; | |
1824 | default: | |
1825 | ret = -LTTNG_ERR_INVALID; | |
1826 | goto end; | |
1827 | } | |
1828 | if (!descriptor) { | |
1829 | ret = -LTTNG_ERR_INVALID; | |
1830 | goto end; | |
00e2e675 | 1831 | } |
b178f53e JG |
1832 | ret_code = lttng_create_session_ext(descriptor); |
1833 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1834 | end: | |
1835 | lttng_session_descriptor_destroy(descriptor); | |
1836 | free(uris); | |
1837 | return ret; | |
1838 | } | |
00e2e675 | 1839 | |
b178f53e JG |
1840 | /* |
1841 | * Create a session exclusively used for snapshot. | |
1842 | * | |
780d4bb8 | 1843 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1844 | */ |
1845 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1846 | { | |
1847 | int ret; | |
1848 | enum lttng_error_code ret_code; | |
1849 | ssize_t size; | |
1850 | struct lttng_uri *uris = NULL; | |
1851 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1852 | |
b178f53e JG |
1853 | if (!name) { |
1854 | ret = -LTTNG_ERR_INVALID; | |
1855 | goto end; | |
1856 | } | |
1857 | ||
1858 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1859 | if (size < 0) { | |
1860 | ret = -LTTNG_ERR_INVALID; | |
1861 | goto end; | |
1862 | } | |
1863 | /* | |
1864 | * If the user does not specify a custom subdir, use the session name. | |
1865 | */ | |
1866 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1867 | strlen(uris[0].subdir) == 0) { | |
1868 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1869 | name); | |
1870 | if (ret < 0) { | |
1871 | PERROR("Failed to set session name as network destination sub-directory"); | |
1872 | ret = -LTTNG_ERR_FATAL; | |
1873 | goto end; | |
1874 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1875 | /* Truncated output. */ | |
1876 | ret = -LTTNG_ERR_INVALID; | |
1877 | goto end; | |
1878 | } | |
1879 | } | |
3dd05a85 | 1880 | |
b178f53e JG |
1881 | switch (size) { |
1882 | case 0: | |
1883 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1884 | break; | |
1885 | case 1: | |
1886 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1887 | ret = -LTTNG_ERR_INVALID; | |
1888 | goto end; | |
1889 | } | |
1890 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1891 | name, | |
1892 | uris[0].dst.path); | |
1893 | break; | |
1894 | case 2: | |
1895 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1896 | name, | |
1897 | snapshot_url, | |
1898 | NULL); | |
1899 | break; | |
1900 | default: | |
1901 | ret = -LTTNG_ERR_INVALID; | |
1902 | goto end; | |
1903 | } | |
1904 | if (!descriptor) { | |
1905 | ret = -LTTNG_ERR_INVALID; | |
1906 | goto end; | |
1907 | } | |
1908 | ret_code = lttng_create_session_ext(descriptor); | |
1909 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1910 | end: | |
1911 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1912 | free(uris); |
1913 | return ret; | |
00e2e675 DG |
1914 | } |
1915 | ||
b178f53e JG |
1916 | /* |
1917 | * Create a session exclusively used for live. | |
1918 | * | |
780d4bb8 | 1919 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1920 | */ |
1921 | int lttng_create_session_live(const char *name, const char *url, | |
1922 | unsigned int timer_interval) | |
1923 | { | |
1924 | int ret; | |
1925 | enum lttng_error_code ret_code; | |
1926 | struct lttng_session_descriptor *descriptor = NULL; | |
1927 | ||
1928 | if (!name) { | |
1929 | ret = -LTTNG_ERR_INVALID; | |
1930 | goto end; | |
1931 | } | |
1932 | ||
1933 | if (url) { | |
1934 | descriptor = lttng_session_descriptor_live_network_create( | |
1935 | name, url, NULL, timer_interval); | |
1936 | } else { | |
1937 | descriptor = lttng_session_descriptor_live_create( | |
1938 | name, timer_interval); | |
1939 | } | |
1940 | if (!descriptor) { | |
1941 | ret = -LTTNG_ERR_INVALID; | |
1942 | goto end; | |
1943 | } | |
1944 | ret_code = lttng_create_session_ext(descriptor); | |
1945 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1946 | end: | |
1947 | lttng_session_descriptor_destroy(descriptor); | |
1948 | return ret; | |
1949 | } | |
1950 | ||
e20ee7c2 JD |
1951 | /* |
1952 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
1953 | * |
1954 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
1955 | */ |
1956 | int lttng_destroy_session(const char *session_name) | |
1957 | { | |
1958 | int ret; | |
3e3665b8 JG |
1959 | enum lttng_error_code ret_code; |
1960 | enum lttng_destruction_handle_status status; | |
1961 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
1962 | |
1963 | /* | |
3e3665b8 JG |
1964 | * Stop the tracing and wait for the data to be |
1965 | * consumed. | |
e20ee7c2 JD |
1966 | */ |
1967 | ret = _lttng_stop_tracing(session_name, 1); | |
1968 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1969 | goto end; | |
1970 | } | |
1971 | ||
3e3665b8 JG |
1972 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
1973 | if (ret_code != LTTNG_OK) { | |
1974 | ret = (int) -ret_code; | |
1975 | goto end; | |
1976 | } | |
1977 | assert(handle); | |
1978 | ||
1979 | /* Block until the completion of the destruction of the session. */ | |
1980 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
1981 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
1982 | ret = -LTTNG_ERR_UNK; | |
1983 | goto end; | |
1984 | } | |
1985 | ||
1986 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
1987 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
1988 | ret = -LTTNG_ERR_UNK; | |
1989 | goto end; | |
1990 | } | |
780d4bb8 | 1991 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 1992 | end: |
3e3665b8 | 1993 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
1994 | return ret; |
1995 | } | |
1996 | ||
1997 | /* | |
1998 | * Destroy the session without waiting for the data. | |
1999 | */ | |
2000 | int lttng_destroy_session_no_wait(const char *session_name) | |
2001 | { | |
3e3665b8 | 2002 | enum lttng_error_code ret_code; |
e20ee7c2 | 2003 | |
3e3665b8 JG |
2004 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
2005 | return ret_code == LTTNG_OK ? ret_code : -ret_code; | |
e20ee7c2 JD |
2006 | } |
2007 | ||
57167058 | 2008 | /* |
9ae110e2 JG |
2009 | * Ask the session daemon for all available sessions. |
2010 | * Sets the contents of the sessions array. | |
2011 | * Returns the number of lttng_session entries in sessions; | |
2012 | * on error, returns a negative value. | |
57167058 | 2013 | */ |
b178f53e | 2014 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2015 | { |
ca95a216 | 2016 | int ret; |
cd80958d | 2017 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2018 | const size_t session_size = sizeof(struct lttng_session) + |
2019 | sizeof(struct lttng_session_extended); | |
2020 | size_t session_count, i; | |
2021 | struct lttng_session_extended *sessions_extended_begin; | |
2022 | struct lttng_session *sessions = NULL; | |
57167058 | 2023 | |
53efb85a | 2024 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2025 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
b178f53e JG |
2026 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2027 | if (ret <= 0) { | |
b178f53e JG |
2028 | goto end; |
2029 | } | |
2030 | if (!sessions) { | |
2031 | ret = -LTTNG_ERR_FATAL; | |
2032 | goto end; | |
2033 | } | |
2034 | ||
2035 | if (ret % session_size) { | |
2036 | ret = -LTTNG_ERR_UNK; | |
2037 | free(sessions); | |
2038 | *out_sessions = NULL; | |
2039 | goto end; | |
57167058 | 2040 | } |
b178f53e JG |
2041 | session_count = (size_t) ret / session_size; |
2042 | sessions_extended_begin = (struct lttng_session_extended *) | |
2043 | (&sessions[session_count]); | |
57167058 | 2044 | |
b178f53e JG |
2045 | /* Set extended session info pointers. */ |
2046 | for (i = 0; i < session_count; i++) { | |
2047 | struct lttng_session *session = &sessions[i]; | |
2048 | struct lttng_session_extended *extended = | |
2049 | &(sessions_extended_begin[i]); | |
2050 | ||
2051 | session->extended.ptr = extended; | |
2052 | } | |
2053 | ||
2054 | ret = (int) session_count; | |
2055 | *out_sessions = sessions; | |
2056 | end: | |
2057 | return ret; | |
2058 | } | |
2059 | ||
2060 | enum lttng_error_code lttng_session_get_creation_time( | |
2061 | const struct lttng_session *session, uint64_t *creation_time) | |
2062 | { | |
2063 | enum lttng_error_code ret = LTTNG_OK; | |
2064 | struct lttng_session_extended *extended; | |
2065 | ||
2066 | if (!session || !creation_time || !session->extended.ptr) { | |
2067 | ret = LTTNG_ERR_INVALID; | |
2068 | goto end; | |
2069 | } | |
2070 | ||
2071 | extended = session->extended.ptr; | |
2072 | if (!extended->creation_time.is_set) { | |
2073 | /* Not created on the session daemon yet. */ | |
2074 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2075 | goto end; | |
2076 | } | |
2077 | *creation_time = extended->creation_time.value; | |
2078 | end: | |
2079 | return ret; | |
57167058 DG |
2080 | } |
2081 | ||
d7ba1388 MD |
2082 | int lttng_set_session_shm_path(const char *session_name, |
2083 | const char *shm_path) | |
2084 | { | |
2085 | struct lttcomm_session_msg lsm; | |
2086 | ||
2087 | if (session_name == NULL) { | |
2088 | return -LTTNG_ERR_INVALID; | |
2089 | } | |
2090 | ||
2091 | memset(&lsm, 0, sizeof(lsm)); | |
2092 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2093 | ||
2094 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2095 | sizeof(lsm.session.name)); | |
2096 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
2097 | sizeof(lsm.u.set_shm_path.shm_path)); | |
2098 | ||
2099 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
2100 | } | |
2101 | ||
9f19cc17 | 2102 | /* |
9ae110e2 JG |
2103 | * Ask the session daemon for all available domains of a session. |
2104 | * Sets the contents of the domains array. | |
2105 | * Returns the number of lttng_domain entries in domains; | |
2106 | * on error, returns a negative value. | |
9f19cc17 | 2107 | */ |
330be774 | 2108 | int lttng_list_domains(const char *session_name, |
cd80958d | 2109 | struct lttng_domain **domains) |
9f19cc17 DG |
2110 | { |
2111 | int ret; | |
cd80958d DG |
2112 | struct lttcomm_session_msg lsm; |
2113 | ||
330be774 | 2114 | if (session_name == NULL) { |
2f70b271 | 2115 | return -LTTNG_ERR_INVALID; |
cd80958d | 2116 | } |
9f19cc17 | 2117 | |
53efb85a | 2118 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2119 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2120 | ||
cac3069d DG |
2121 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2122 | sizeof(lsm.session.name)); | |
cd80958d | 2123 | |
cac3069d | 2124 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
2125 | if (ret < 0) { |
2126 | return ret; | |
2127 | } | |
2128 | ||
2129 | return ret / sizeof(struct lttng_domain); | |
2130 | } | |
2131 | ||
2132 | /* | |
9ae110e2 JG |
2133 | * Ask the session daemon for all available channels of a session. |
2134 | * Sets the contents of the channels array. | |
2135 | * Returns the number of lttng_channel entries in channels; | |
2136 | * on error, returns a negative value. | |
9f19cc17 | 2137 | */ |
cd80958d DG |
2138 | int lttng_list_channels(struct lttng_handle *handle, |
2139 | struct lttng_channel **channels) | |
9f19cc17 DG |
2140 | { |
2141 | int ret; | |
53e367f9 JG |
2142 | size_t channel_count, i; |
2143 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2144 | sizeof(struct lttng_channel_extended); |
cd80958d | 2145 | struct lttcomm_session_msg lsm; |
53e367f9 | 2146 | void *extended_at; |
cd80958d | 2147 | |
9d697d3d | 2148 | if (handle == NULL) { |
53e367f9 JG |
2149 | ret = -LTTNG_ERR_INVALID; |
2150 | goto end; | |
cd80958d DG |
2151 | } |
2152 | ||
53efb85a | 2153 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2154 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 2155 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2156 | sizeof(lsm.session.name)); |
9f19cc17 | 2157 | |
60160d2a | 2158 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2159 | |
cac3069d | 2160 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2161 | if (ret < 0) { |
53e367f9 JG |
2162 | goto end; |
2163 | } | |
2164 | ||
2165 | if (ret % channel_size) { | |
2166 | ret = -LTTNG_ERR_UNK; | |
2167 | free(*channels); | |
2168 | *channels = NULL; | |
2169 | goto end; | |
9f19cc17 | 2170 | } |
53e367f9 | 2171 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2172 | |
53e367f9 JG |
2173 | /* Set extended info pointers */ |
2174 | extended_at = ((void *) *channels) + | |
2175 | channel_count * sizeof(struct lttng_channel); | |
2176 | for (i = 0; i < channel_count; i++) { | |
2177 | struct lttng_channel *chan = &(*channels)[i]; | |
2178 | ||
2179 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2180 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2181 | } |
2182 | ||
2183 | ret = (int) channel_count; | |
2184 | end: | |
2185 | return ret; | |
9f19cc17 DG |
2186 | } |
2187 | ||
2188 | /* | |
9ae110e2 JG |
2189 | * Ask the session daemon for all available events of a session channel. |
2190 | * Sets the contents of the events array. | |
2191 | * Returns the number of lttng_event entries in events; | |
2192 | * on error, returns a negative value. | |
9f19cc17 | 2193 | */ |
cd80958d DG |
2194 | int lttng_list_events(struct lttng_handle *handle, |
2195 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2196 | { |
2197 | int ret; | |
cd80958d | 2198 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
2199 | struct lttcomm_event_command_header *cmd_header = NULL; |
2200 | size_t cmd_header_len; | |
2201 | uint32_t nb_events, i; | |
de453daa | 2202 | void *comm_ext_at; |
de453daa | 2203 | char *reception_buffer = NULL; |
56f0bc67 | 2204 | struct lttng_dynamic_buffer listing; |
de453daa | 2205 | size_t storage_req; |
9f19cc17 | 2206 | |
9d697d3d DG |
2207 | /* Safety check. An handle and channel name are mandatory */ |
2208 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 2209 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
2210 | } |
2211 | ||
53efb85a | 2212 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2213 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 2214 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2215 | sizeof(lsm.session.name)); |
cac3069d | 2216 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 2217 | sizeof(lsm.u.list.channel_name)); |
60160d2a | 2218 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2219 | |
a04d53fc | 2220 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
2221 | (void **) &reception_buffer, (void **) &cmd_header, |
2222 | &cmd_header_len); | |
9f19cc17 | 2223 | if (ret < 0) { |
de453daa | 2224 | goto end; |
9f19cc17 DG |
2225 | } |
2226 | ||
d9f484bc JG |
2227 | if (!cmd_header) { |
2228 | ret = -LTTNG_ERR_UNK; | |
2229 | goto end; | |
2230 | } | |
2231 | ||
b4e3ceb9 PP |
2232 | /* Set number of events and free command header */ |
2233 | nb_events = cmd_header->nb_events; | |
2234 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2235 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2236 | goto end; |
b4e3ceb9 | 2237 | } |
b4e3ceb9 PP |
2238 | free(cmd_header); |
2239 | cmd_header = NULL; | |
2240 | ||
de453daa JG |
2241 | /* |
2242 | * The buffer that is returned must contain a "flat" version of | |
2243 | * the events that are returned. In other words, all pointers | |
2244 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2245 | * buffer so that the user may free everything by simply calling free() |
2246 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2247 | * compatibility. |
2248 | * | |
56f0bc67 JG |
2249 | * A first pass is performed to compute the size of the buffer that |
2250 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2251 | * the returned events so that their members always point within the |
2252 | * buffer. | |
2253 | * | |
2254 | * The layout of the returned buffer is as follows: | |
2255 | * - struct lttng_event[nb_events], | |
2256 | * - nb_events times the following: | |
2257 | * - struct lttng_event_extended, | |
2258 | * - flattened version of userspace_probe_location | |
2259 | * - filter_expression | |
2260 | * - exclusions | |
2261 | * - padding to align to 64-bits | |
2262 | */ | |
2263 | comm_ext_at = reception_buffer + | |
2264 | (nb_events * sizeof(struct lttng_event)); | |
2265 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
2266 | |
2267 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
2268 | struct lttcomm_event_extended_header *ext_comm = |
2269 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 2270 | int probe_storage_req = 0; |
b4e3ceb9 | 2271 | |
de453daa JG |
2272 | comm_ext_at += sizeof(*ext_comm); |
2273 | comm_ext_at += ext_comm->filter_len; | |
2274 | comm_ext_at += | |
2275 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2276 | ||
56f0bc67 JG |
2277 | if (ext_comm->userspace_probe_location_len) { |
2278 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2279 | struct lttng_buffer_view probe_location_view; | |
2280 | ||
2281 | probe_location_view = lttng_buffer_view_init( | |
2282 | comm_ext_at, 0, | |
2283 | ext_comm->userspace_probe_location_len); | |
2284 | ||
2285 | /* | |
2286 | * Create a temporary userspace probe location to | |
2287 | * determine the size needed by a "flattened" version | |
2288 | * of that same probe location. | |
2289 | */ | |
2290 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2291 | &probe_location_view, &probe_location); | |
2292 | if (ret < 0) { | |
2293 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2294 | goto end; | |
2295 | } | |
2296 | ||
2297 | ret = lttng_userspace_probe_location_flatten( | |
2298 | probe_location, NULL); | |
2299 | lttng_userspace_probe_location_destroy(probe_location); | |
2300 | if (ret < 0) { | |
2301 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2302 | goto end; | |
2303 | } | |
2304 | ||
2305 | probe_storage_req = ret; | |
2306 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2307 | } |
2308 | ||
de453daa | 2309 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2310 | storage_req += ext_comm->filter_len; |
2311 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2312 | /* Padding to ensure the flat probe is aligned. */ |
2313 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2314 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2315 | } |
2316 | ||
56f0bc67 JG |
2317 | lttng_dynamic_buffer_init(&listing); |
2318 | /* | |
2319 | * We must ensure that "listing" is never resized so as to preserve | |
2320 | * the validity of the flattened objects. | |
2321 | */ | |
2322 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2323 | if (ret) { | |
2324 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2325 | goto end; |
2326 | } | |
56f0bc67 JG |
2327 | |
2328 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2329 | nb_events * sizeof(struct lttng_event)); | |
2330 | if (ret) { | |
2331 | ret = -LTTNG_ERR_NOMEM; | |
2332 | goto free_dynamic_buffer; | |
2333 | } | |
de453daa JG |
2334 | |
2335 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2336 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2337 | for (i = 0; i < nb_events; i++) { |
2338 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2339 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2340 | struct lttcomm_event_extended_header *ext_comm = |
2341 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2342 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2343 | (struct lttng_event_extended *) |
2344 | (listing.data + listing.size); | |
de453daa | 2345 | |
56f0bc67 JG |
2346 | /* Insert struct lttng_event_extended. */ |
2347 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2348 | listing.size + sizeof(*event_extended)); | |
2349 | if (ret) { | |
2350 | ret = -LTTNG_ERR_NOMEM; | |
2351 | goto free_dynamic_buffer; | |
2352 | } | |
de453daa | 2353 | event->extended.ptr = event_extended; |
56f0bc67 | 2354 | |
de453daa JG |
2355 | comm_ext_at += sizeof(*ext_comm); |
2356 | ||
56f0bc67 JG |
2357 | /* Insert filter expression. */ |
2358 | if (ext_comm->filter_len) { | |
2359 | event_extended->filter_expression = listing.data + | |
2360 | listing.size; | |
2361 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2362 | ext_comm->filter_len); | |
2363 | if (ret) { | |
2364 | ret = -LTTNG_ERR_NOMEM; | |
2365 | goto free_dynamic_buffer; | |
2366 | } | |
2367 | comm_ext_at += ext_comm->filter_len; | |
2368 | } | |
2369 | ||
2370 | /* Insert exclusions. */ | |
2371 | if (ext_comm->nb_exclusions) { | |
2372 | event_extended->exclusions.count = | |
2373 | ext_comm->nb_exclusions; | |
2374 | event_extended->exclusions.strings = | |
2375 | listing.data + listing.size; | |
2376 | ||
2377 | ret = lttng_dynamic_buffer_append(&listing, | |
2378 | comm_ext_at, | |
2379 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2380 | if (ret) { | |
2381 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2382 | goto free_dynamic_buffer; |
56f0bc67 JG |
2383 | } |
2384 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2385 | } | |
2386 | ||
2387 | /* Insert padding to align to 64-bits. */ | |
2388 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2389 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2390 | if (ret) { | |
2391 | ret = -LTTNG_ERR_NOMEM; | |
2392 | goto free_dynamic_buffer; | |
2393 | } | |
2394 | ||
2395 | /* Insert flattened userspace probe location. */ | |
2396 | if (ext_comm->userspace_probe_location_len) { | |
2397 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2398 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2399 | |
56f0bc67 JG |
2400 | probe_location_view = lttng_buffer_view_init( |
2401 | comm_ext_at, 0, | |
2402 | ext_comm->userspace_probe_location_len); | |
de453daa | 2403 | |
56f0bc67 JG |
2404 | ret = lttng_userspace_probe_location_create_from_buffer( |
2405 | &probe_location_view, &probe_location); | |
2406 | if (ret < 0) { | |
2407 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2408 | goto free_dynamic_buffer; | |
2409 | } | |
2410 | ||
2411 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2412 | (listing.data + listing.size); | |
2413 | ret = lttng_userspace_probe_location_flatten( | |
2414 | probe_location, &listing); | |
2415 | lttng_userspace_probe_location_destroy(probe_location); | |
2416 | if (ret < 0) { | |
2417 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2418 | goto free_dynamic_buffer; | |
2419 | } | |
2420 | ||
2421 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2422 | } | |
de453daa JG |
2423 | } |
2424 | ||
56f0bc67 JG |
2425 | /* Don't reset listing buffer as we return its content. */ |
2426 | *events = (struct lttng_event *) listing.data; | |
2427 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2428 | ret = (int) nb_events; |
56f0bc67 JG |
2429 | free_dynamic_buffer: |
2430 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2431 | end: |
b4e3ceb9 | 2432 | free(cmd_header); |
de453daa | 2433 | free(reception_buffer); |
b4e3ceb9 | 2434 | return ret; |
9f19cc17 DG |
2435 | } |
2436 | ||
fac6795d | 2437 | /* |
1c8d13c8 TD |
2438 | * Sets the tracing_group variable with name. |
2439 | * This function allocates memory pointed to by tracing_group. | |
2440 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2441 | */ |
2442 | int lttng_set_tracing_group(const char *name) | |
2443 | { | |
9d697d3d | 2444 | if (name == NULL) { |
2f70b271 | 2445 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2446 | } |
2447 | ||
fac6795d | 2448 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2449 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2450 | } |
2451 | ||
2452 | return 0; | |
2453 | } | |
2454 | ||
cd80958d | 2455 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2456 | struct lttng_calibrate *calibrate) |
2457 | { | |
b812e5ca PP |
2458 | /* |
2459 | * This command was removed in LTTng 2.9. | |
2460 | */ | |
2461 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2462 | } |
2463 | ||
5edd7e09 DG |
2464 | /* |
2465 | * Set default channel attributes. | |
441c16a7 | 2466 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2467 | */ |
2468 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2469 | struct lttng_channel_attr *attr) | |
2470 | { | |
294851b0 | 2471 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2472 | |
5edd7e09 DG |
2473 | /* Safety check */ |
2474 | if (attr == NULL || domain == NULL) { | |
2475 | return; | |
2476 | } | |
2477 | ||
294851b0 | 2478 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2479 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2480 | ||
0a9c6494 DG |
2481 | /* Same for all domains. */ |
2482 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2483 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2484 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2485 | ||
5edd7e09 DG |
2486 | switch (domain->type) { |
2487 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2488 | attr->switch_timer_interval = |
2489 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2490 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2491 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2492 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2493 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2494 | if (extended) { |
2495 | extended->monitor_timer_interval = | |
2496 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2497 | extended->blocking_timeout = |
2498 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2499 | } |
5edd7e09 DG |
2500 | break; |
2501 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2502 | switch (domain->buf_type) { |
2503 | case LTTNG_BUFFER_PER_UID: | |
2504 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2505 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2506 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2507 | attr->switch_timer_interval = |
2508 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2509 | attr->read_timer_interval = | |
2510 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2511 | if (extended) { |
2512 | extended->monitor_timer_interval = | |
2513 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2514 | extended->blocking_timeout = |
2515 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2516 | } |
0a9c6494 DG |
2517 | break; |
2518 | case LTTNG_BUFFER_PER_PID: | |
2519 | default: | |
2520 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2521 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2522 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2523 | attr->switch_timer_interval = |
2524 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2525 | attr->read_timer_interval = | |
2526 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2527 | if (extended) { |
2528 | extended->monitor_timer_interval = | |
2529 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2530 | extended->blocking_timeout = |
2531 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2532 | } |
0a9c6494 DG |
2533 | break; |
2534 | } | |
5edd7e09 | 2535 | default: |
441c16a7 | 2536 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2537 | break; |
2538 | } | |
cf0bcb51 JG |
2539 | |
2540 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2541 | } |
2542 | ||
5ba3702f JG |
2543 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2544 | uint64_t *discarded_events) | |
2545 | { | |
2546 | int ret = 0; | |
cf0bcb51 | 2547 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2548 | |
2549 | if (!channel || !discarded_events) { | |
2550 | ret = -LTTNG_ERR_INVALID; | |
2551 | goto end; | |
2552 | } | |
2553 | ||
2554 | chan_ext = channel->attr.extended.ptr; | |
2555 | if (!chan_ext) { | |
2556 | /* | |
2557 | * This can happen since the lttng_channel structure is | |
2558 | * used for other tasks where this pointer is never set. | |
2559 | */ | |
2560 | *discarded_events = 0; | |
2561 | goto end; | |
2562 | } | |
2563 | ||
2564 | *discarded_events = chan_ext->discarded_events; | |
2565 | end: | |
2566 | return ret; | |
2567 | } | |
2568 | ||
2569 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2570 | uint64_t *lost_packets) | |
2571 | { | |
2572 | int ret = 0; | |
cf0bcb51 | 2573 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2574 | |
2575 | if (!channel || !lost_packets) { | |
2576 | ret = -LTTNG_ERR_INVALID; | |
2577 | goto end; | |
2578 | } | |
2579 | ||
2580 | chan_ext = channel->attr.extended.ptr; | |
2581 | if (!chan_ext) { | |
2582 | /* | |
2583 | * This can happen since the lttng_channel structure is | |
2584 | * used for other tasks where this pointer is never set. | |
2585 | */ | |
2586 | *lost_packets = 0; | |
2587 | goto end; | |
2588 | } | |
2589 | ||
2590 | *lost_packets = chan_ext->lost_packets; | |
2591 | end: | |
2592 | return ret; | |
2593 | } | |
2594 | ||
cf0bcb51 JG |
2595 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2596 | uint64_t *monitor_timer_interval) | |
2597 | { | |
2598 | int ret = 0; | |
2599 | ||
2600 | if (!chan || !monitor_timer_interval) { | |
2601 | ret = -LTTNG_ERR_INVALID; | |
2602 | goto end; | |
2603 | } | |
2604 | ||
2605 | if (!chan->attr.extended.ptr) { | |
2606 | ret = -LTTNG_ERR_INVALID; | |
2607 | goto end; | |
2608 | } | |
2609 | ||
2610 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2611 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2612 | end: | |
2613 | return ret; | |
2614 | } | |
2615 | ||
2616 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2617 | uint64_t monitor_timer_interval) | |
2618 | { | |
2619 | int ret = 0; | |
2620 | ||
2621 | if (!chan || !chan->attr.extended.ptr) { | |
2622 | ret = -LTTNG_ERR_INVALID; | |
2623 | goto end; | |
2624 | } | |
2625 | ||
2626 | ((struct lttng_channel_extended *) | |
2627 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2628 | monitor_timer_interval; | |
2629 | end: | |
2630 | return ret; | |
2631 | } | |
2632 | ||
491d1539 MD |
2633 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2634 | int64_t *blocking_timeout) | |
2635 | { | |
2636 | int ret = 0; | |
2637 | ||
2638 | if (!chan || !blocking_timeout) { | |
2639 | ret = -LTTNG_ERR_INVALID; | |
2640 | goto end; | |
2641 | } | |
2642 | ||
2643 | if (!chan->attr.extended.ptr) { | |
2644 | ret = -LTTNG_ERR_INVALID; | |
2645 | goto end; | |
2646 | } | |
2647 | ||
2648 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2649 | chan->attr.extended.ptr)->blocking_timeout; | |
2650 | end: | |
2651 | return ret; | |
2652 | } | |
2653 | ||
2654 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2655 | int64_t blocking_timeout) | |
2656 | { | |
2657 | int ret = 0; | |
2658 | int64_t msec_timeout; | |
2659 | ||
2660 | if (!chan || !chan->attr.extended.ptr) { | |
2661 | ret = -LTTNG_ERR_INVALID; | |
2662 | goto end; | |
2663 | } | |
2664 | ||
2665 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2666 | ret = -LTTNG_ERR_INVALID; | |
2667 | goto end; | |
2668 | } | |
2669 | ||
2670 | /* | |
2671 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2672 | * us to accept a narrower range of values (msecs expressed as a signed | |
2673 | * 32-bit integer). | |
2674 | */ | |
2675 | msec_timeout = blocking_timeout / 1000; | |
2676 | if (msec_timeout != (int32_t) msec_timeout) { | |
2677 | ret = -LTTNG_ERR_INVALID; | |
2678 | goto end; | |
2679 | } | |
2680 | ||
2681 | ((struct lttng_channel_extended *) | |
2682 | chan->attr.extended.ptr)->blocking_timeout = | |
2683 | blocking_timeout; | |
2684 | end: | |
2685 | return ret; | |
2686 | } | |
2687 | ||
fac6795d | 2688 | /* |
2269e89e | 2689 | * Check if session daemon is alive. |
fac6795d | 2690 | * |
2269e89e | 2691 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2692 | * On error returns a negative value. |
fac6795d | 2693 | */ |
947308c4 | 2694 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2695 | { |
2696 | int ret; | |
2697 | ||
2698 | ret = set_session_daemon_path(); | |
2699 | if (ret < 0) { | |
9ae110e2 | 2700 | /* Error. */ |
fac6795d DG |
2701 | return ret; |
2702 | } | |
2703 | ||
9d035200 | 2704 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2705 | /* |
9ae110e2 JG |
2706 | * No socket path set. Weird error which means the constructor |
2707 | * was not called. | |
2f70b271 DG |
2708 | */ |
2709 | assert(0); | |
fac6795d DG |
2710 | } |
2711 | ||
2269e89e | 2712 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2713 | if (ret < 0) { |
9ae110e2 | 2714 | /* Not alive. */ |
7d8234d9 MD |
2715 | return 0; |
2716 | } | |
7d8234d9 | 2717 | |
9ae110e2 | 2718 | /* Is alive. */ |
947308c4 | 2719 | return 1; |
fac6795d DG |
2720 | } |
2721 | ||
00e2e675 | 2722 | /* |
a4b92340 | 2723 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2724 | * |
2725 | * Return 0 on success, else a negative value. | |
2726 | */ | |
a4b92340 DG |
2727 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2728 | const char *control_url, const char *data_url) | |
00e2e675 | 2729 | { |
3dd05a85 | 2730 | int ret; |
a4b92340 | 2731 | ssize_t size; |
00e2e675 | 2732 | struct lttcomm_session_msg lsm; |
a4b92340 | 2733 | struct lttng_uri *uris = NULL; |
00e2e675 | 2734 | |
a4b92340 | 2735 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2736 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2737 | } |
2738 | ||
a4b92340 DG |
2739 | memset(&lsm, 0, sizeof(lsm)); |
2740 | ||
00e2e675 DG |
2741 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2742 | ||
cac3069d | 2743 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2744 | sizeof(lsm.session.name)); |
60160d2a | 2745 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2746 | |
bc894455 | 2747 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2748 | if (size < 0) { |
2f70b271 | 2749 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2750 | } |
2751 | ||
2752 | lsm.u.uri.size = size; | |
00e2e675 | 2753 | |
795a978d | 2754 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2755 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2756 | |
2757 | free(uris); | |
2758 | return ret; | |
00e2e675 DG |
2759 | } |
2760 | ||
2761 | /* | |
9c6bda17 | 2762 | * [OBSOLETE] |
00e2e675 | 2763 | */ |
2ec40111 | 2764 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2765 | int lttng_enable_consumer(struct lttng_handle *handle) |
2766 | { | |
785d2d0d | 2767 | return -ENOSYS; |
00e2e675 DG |
2768 | } |
2769 | ||
2770 | /* | |
9c6bda17 | 2771 | * [OBSOLETE] |
00e2e675 | 2772 | */ |
2ec40111 | 2773 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2774 | int lttng_disable_consumer(struct lttng_handle *handle) |
2775 | { | |
785d2d0d | 2776 | return -ENOSYS; |
00e2e675 DG |
2777 | } |
2778 | ||
07424f16 | 2779 | /* |
b178f53e | 2780 | * [OBSOLETE] |
07424f16 | 2781 | */ |
2ec40111 SM |
2782 | int _lttng_create_session_ext(const char *name, const char *url, |
2783 | const char *datetime); | |
07424f16 DG |
2784 | int _lttng_create_session_ext(const char *name, const char *url, |
2785 | const char *datetime) | |
2786 | { | |
b178f53e | 2787 | return -ENOSYS; |
07424f16 DG |
2788 | } |
2789 | ||
806e2684 DG |
2790 | /* |
2791 | * For a given session name, this call checks if the data is ready to be read | |
2792 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2793 | * any readers. | |
2794 | */ | |
6d805429 | 2795 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2796 | { |
2797 | int ret; | |
2798 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2799 | uint8_t *pending = NULL; |
806e2684 DG |
2800 | |
2801 | if (session_name == NULL) { | |
2802 | return -LTTNG_ERR_INVALID; | |
2803 | } | |
2804 | ||
53efb85a | 2805 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2806 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2807 | |
cac3069d DG |
2808 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2809 | sizeof(lsm.session.name)); | |
806e2684 | 2810 | |
f6151c55 JG |
2811 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2812 | if (ret < 0) { | |
2813 | goto end; | |
2814 | } else if (ret != 1) { | |
2815 | /* Unexpected payload size */ | |
2816 | ret = -LTTNG_ERR_INVALID; | |
2817 | goto end; | |
e848d36d JG |
2818 | } else if (!pending) { |
2819 | /* Internal error. */ | |
2820 | ret = -LTTNG_ERR_UNK; | |
2821 | goto end; | |
806e2684 DG |
2822 | } |
2823 | ||
f6151c55 JG |
2824 | ret = (int) *pending; |
2825 | end: | |
2826 | free(pending); | |
806e2684 DG |
2827 | return ret; |
2828 | } | |
2829 | ||
a5dfbb9d | 2830 | /* |
55c9e7ca | 2831 | * List IDs in the tracker. |
a5dfbb9d | 2832 | * |
55c9e7ca JR |
2833 | * tracker_type is the type of tracker. |
2834 | * ids is set to an allocated array of IDs currently tracked. On | |
2d97a006 | 2835 | * success, ids and contained ids must be freed/destroy by the caller. |
55c9e7ca | 2836 | * nr_ids is set to the number of entries contained by the ids array. |
a5dfbb9d MD |
2837 | * |
2838 | * Returns 0 on success, else a negative LTTng error code. | |
2839 | */ | |
55c9e7ca JR |
2840 | int lttng_list_tracker_ids(struct lttng_handle *handle, |
2841 | enum lttng_tracker_type tracker_type, | |
a7a533cd | 2842 | struct lttng_tracker_ids **_ids) |
a5dfbb9d | 2843 | { |
55c9e7ca | 2844 | int ret, i; |
a5dfbb9d | 2845 | struct lttcomm_session_msg lsm; |
55c9e7ca JR |
2846 | struct lttcomm_tracker_command_header *cmd_header = NULL; |
2847 | char *cmd_payload = NULL, *p; | |
2848 | size_t cmd_header_len; | |
2849 | size_t nr_ids = 0; | |
a7a533cd | 2850 | struct lttng_tracker_ids *ids = NULL; |
a5dfbb9d MD |
2851 | |
2852 | if (handle == NULL) { | |
2853 | return -LTTNG_ERR_INVALID; | |
2854 | } | |
2855 | ||
2856 | memset(&lsm, 0, sizeof(lsm)); | |
55c9e7ca JR |
2857 | lsm.cmd_type = LTTNG_LIST_TRACKER_IDS; |
2858 | lsm.u.id_tracker_list.tracker_type = tracker_type; | |
a5dfbb9d MD |
2859 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
2860 | sizeof(lsm.session.name)); | |
60160d2a | 2861 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
a5dfbb9d | 2862 | |
55c9e7ca JR |
2863 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
2864 | (void **) &cmd_payload, (void **) &cmd_header, | |
2865 | &cmd_header_len); | |
a5dfbb9d | 2866 | if (ret < 0) { |
55c9e7ca JR |
2867 | goto error; |
2868 | } | |
2869 | ||
2870 | /* Set number of tracker_id and free command header */ | |
2871 | nr_ids = cmd_header->nb_tracker_id; | |
2872 | if (nr_ids > INT_MAX) { | |
2873 | ret = -LTTNG_ERR_OVERFLOW; | |
2874 | goto error; | |
2875 | } | |
2876 | free(cmd_header); | |
2877 | cmd_header = NULL; | |
2878 | ||
a7a533cd | 2879 | ids = lttng_tracker_ids_create(nr_ids); |
55c9e7ca JR |
2880 | if (!ids) { |
2881 | ret = -LTTNG_ERR_NOMEM; | |
2882 | goto error; | |
2883 | } | |
2884 | ||
2885 | p = cmd_payload; | |
2886 | for (i = 0; i < nr_ids; i++) { | |
2887 | struct lttcomm_tracker_id_header *tracker_id; | |
2888 | struct lttng_tracker_id *id; | |
2d97a006 | 2889 | enum lttng_tracker_id_status status; |
55c9e7ca JR |
2890 | |
2891 | tracker_id = (struct lttcomm_tracker_id_header *) p; | |
2892 | p += sizeof(struct lttcomm_tracker_id_header); | |
a7a533cd | 2893 | id = lttng_tracker_ids_get_pointer_of_index(ids, i); |
2d97a006 | 2894 | if (!id) { |
a7a533cd | 2895 | ret = -LTTNG_ERR_INVALID; |
2d97a006 JR |
2896 | goto error; |
2897 | } | |
55c9e7ca | 2898 | |
55c9e7ca JR |
2899 | switch (tracker_id->type) { |
2900 | case LTTNG_ID_ALL: | |
2d97a006 | 2901 | status = lttng_tracker_id_set_all(id); |
55c9e7ca JR |
2902 | break; |
2903 | case LTTNG_ID_VALUE: | |
2904 | id->value = tracker_id->u.value; | |
2d97a006 JR |
2905 | status = lttng_tracker_id_set_value( |
2906 | id, tracker_id->u.value); | |
55c9e7ca JR |
2907 | break; |
2908 | case LTTNG_ID_STRING: | |
2d97a006 | 2909 | status = lttng_tracker_id_set_string(id, p); |
55c9e7ca JR |
2910 | p += tracker_id->u.var_data_len; |
2911 | break; | |
2912 | default: | |
2913 | goto error; | |
2914 | } | |
2d97a006 JR |
2915 | |
2916 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
2917 | ret = -LTTNG_ERR_INVALID; | |
2918 | goto error; | |
2919 | } | |
55c9e7ca JR |
2920 | } |
2921 | free(cmd_payload); | |
2922 | *_ids = ids; | |
55c9e7ca JR |
2923 | return 0; |
2924 | ||
2925 | error: | |
a7a533cd | 2926 | lttng_tracker_ids_destroy(ids); |
55c9e7ca JR |
2927 | free(cmd_payload); |
2928 | free(cmd_header); | |
2929 | return ret; | |
2930 | } | |
2931 | ||
2932 | /* | |
2933 | * List PIDs in the tracker. | |
2934 | * | |
2935 | * enabled is set to whether the PID tracker is enabled. | |
2936 | * pids is set to an allocated array of PIDs currently tracked. On | |
2937 | * success, pids must be freed by the caller. | |
2938 | * nr_pids is set to the number of entries contained by the pids array. | |
2939 | * | |
2940 | * Returns 0 on success, else a negative LTTng error code. | |
2941 | */ | |
2942 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2943 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2944 | { | |
a7a533cd | 2945 | struct lttng_tracker_ids *ids = NULL; |
e283e4a0 | 2946 | unsigned int nr_ids = 0; |
55c9e7ca JR |
2947 | int *pids = NULL; |
2948 | int ret = 0, i; | |
2d97a006 | 2949 | enum lttng_tracker_id_status status; |
a7a533cd | 2950 | const struct lttng_tracker_id *id; |
55c9e7ca | 2951 | |
a7a533cd JR |
2952 | ret = lttng_list_tracker_ids(handle, LTTNG_TRACKER_PID, &ids); |
2953 | if (ret < 0) { | |
a5dfbb9d | 2954 | return ret; |
a7a533cd | 2955 | } |
55c9e7ca | 2956 | |
e283e4a0 JR |
2957 | status = lttng_tracker_ids_get_count(ids, &nr_ids); |
2958 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
2959 | ret = -LTTNG_ERR_INVALID; | |
2960 | goto end; | |
2961 | } | |
a7a533cd JR |
2962 | |
2963 | if (nr_ids == 1) { | |
2964 | id = lttng_tracker_ids_get_at_index(ids, 0); | |
2965 | if (id && lttng_tracker_id_get_type(id) == LTTNG_ID_ALL) { | |
2966 | *_enabled = 0; | |
2967 | goto end; | |
2968 | } | |
a5dfbb9d | 2969 | } |
a7a533cd | 2970 | |
55c9e7ca JR |
2971 | *_enabled = 1; |
2972 | ||
2973 | pids = zmalloc(nr_ids * sizeof(*pids)); | |
2974 | if (!pids) { | |
2975 | ret = -LTTNG_ERR_NOMEM; | |
2976 | goto end; | |
de8218d4 | 2977 | } |
55c9e7ca | 2978 | for (i = 0; i < nr_ids; i++) { |
a7a533cd | 2979 | id = lttng_tracker_ids_get_at_index(ids, i); |
2d97a006 JR |
2980 | status = lttng_tracker_id_get_value(id, &pids[i]); |
2981 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
55c9e7ca JR |
2982 | ret = -LTTNG_ERR_UNK; |
2983 | goto end; | |
2984 | } | |
a5dfbb9d | 2985 | } |
a5dfbb9d | 2986 | *_pids = pids; |
55c9e7ca JR |
2987 | *_nr_pids = nr_ids; |
2988 | end: | |
a7a533cd | 2989 | lttng_tracker_ids_destroy(ids); |
55c9e7ca JR |
2990 | if (ret < 0) { |
2991 | free(pids); | |
2992 | } | |
2993 | return ret; | |
a5dfbb9d MD |
2994 | } |
2995 | ||
93ec662e JD |
2996 | /* |
2997 | * Regenerate the metadata for a session. | |
2998 | * Return 0 on success, a negative error code on error. | |
2999 | */ | |
eded6438 | 3000 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
3001 | { |
3002 | int ret; | |
3003 | struct lttcomm_session_msg lsm; | |
3004 | ||
3005 | if (!session_name) { | |
3006 | ret = -LTTNG_ERR_INVALID; | |
3007 | goto end; | |
3008 | } | |
3009 | ||
3010 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 3011 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
3012 | |
3013 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
3014 | sizeof(lsm.session.name)); | |
3015 | ||
3016 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3017 | if (ret < 0) { | |
3018 | goto end; | |
3019 | } | |
3020 | ||
3021 | ret = 0; | |
3022 | end: | |
3023 | return ret; | |
3024 | } | |
3025 | ||
eded6438 JD |
3026 | /* |
3027 | * Deprecated, replaced by lttng_regenerate_metadata. | |
3028 | */ | |
3029 | int lttng_metadata_regenerate(const char *session_name) | |
3030 | { | |
3031 | return lttng_regenerate_metadata(session_name); | |
3032 | } | |
3033 | ||
c2561365 JD |
3034 | /* |
3035 | * Regenerate the statedump of a session. | |
3036 | * Return 0 on success, a negative error code on error. | |
3037 | */ | |
3038 | int lttng_regenerate_statedump(const char *session_name) | |
3039 | { | |
3040 | int ret; | |
3041 | struct lttcomm_session_msg lsm; | |
3042 | ||
3043 | if (!session_name) { | |
3044 | ret = -LTTNG_ERR_INVALID; | |
3045 | goto end; | |
3046 | } | |
3047 | ||
3048 | memset(&lsm, 0, sizeof(lsm)); | |
3049 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
3050 | ||
3051 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
3052 | sizeof(lsm.session.name)); | |
3053 | ||
3054 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3055 | if (ret < 0) { | |
3056 | goto end; | |
3057 | } | |
3058 | ||
3059 | ret = 0; | |
3060 | end: | |
3061 | return ret; | |
3062 | } | |
3063 | ||
a58c490f JG |
3064 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3065 | { | |
3066 | int ret; | |
3067 | struct lttcomm_session_msg lsm; | |
3647288f | 3068 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3069 | |
3647288f | 3070 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3071 | if (!trigger) { |
3072 | ret = -LTTNG_ERR_INVALID; | |
3073 | goto end; | |
3074 | } | |
3075 | ||
3076 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 3077 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3078 | goto end; |
3079 | } | |
3080 | ||
3647288f JG |
3081 | ret = lttng_trigger_serialize(trigger, &buffer); |
3082 | if (ret < 0) { | |
a58c490f JG |
3083 | ret = -LTTNG_ERR_UNK; |
3084 | goto end; | |
3085 | } | |
3086 | ||
a58c490f JG |
3087 | memset(&lsm, 0, sizeof(lsm)); |
3088 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
3089 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3090 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3091 | buffer.size, NULL); | |
a58c490f | 3092 | end: |
3647288f | 3093 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3094 | return ret; |
3095 | } | |
3096 | ||
3097 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
3098 | { | |
3099 | int ret; | |
3100 | struct lttcomm_session_msg lsm; | |
3647288f | 3101 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3102 | |
3647288f | 3103 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3104 | if (!trigger) { |
3105 | ret = -LTTNG_ERR_INVALID; | |
3106 | goto end; | |
3107 | } | |
3108 | ||
3109 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 3110 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3111 | goto end; |
3112 | } | |
3113 | ||
3647288f JG |
3114 | ret = lttng_trigger_serialize(trigger, &buffer); |
3115 | if (ret < 0) { | |
a58c490f JG |
3116 | ret = -LTTNG_ERR_UNK; |
3117 | goto end; | |
3118 | } | |
3119 | ||
a58c490f JG |
3120 | memset(&lsm, 0, sizeof(lsm)); |
3121 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
3122 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3123 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3124 | buffer.size, NULL); | |
a58c490f | 3125 | end: |
3647288f | 3126 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3127 | return ret; |
3128 | } | |
3129 | ||
2d97a006 JR |
3130 | static int lttng_track_untrack_id(struct lttng_handle *handle, |
3131 | enum lttng_tracker_type tracker_type, | |
3132 | const struct lttng_tracker_id *id, | |
3133 | enum lttcomm_sessiond_command cmd) | |
3134 | { | |
3135 | int ret; | |
3136 | struct lttcomm_session_msg lsm; | |
3137 | const char *var_data; | |
3138 | size_t var_data_len = 0; | |
3139 | int value; | |
3140 | enum lttng_tracker_id_status status; | |
3141 | ||
3142 | /* NULL arguments are forbidden. No default values. */ | |
3143 | if (handle == NULL) { | |
3144 | goto error; | |
3145 | } | |
3146 | ||
3147 | memset(&lsm, 0, sizeof(lsm)); | |
3148 | ||
3149 | lsm.cmd_type = cmd; | |
3150 | lsm.u.id_tracker.tracker_type = tracker_type; | |
3151 | lsm.u.id_tracker.id_type = lttng_tracker_id_get_type(id); | |
3152 | switch (lsm.u.id_tracker.id_type) { | |
3153 | case LTTNG_ID_ALL: | |
3154 | break; | |
3155 | case LTTNG_ID_VALUE: | |
3156 | status = lttng_tracker_id_get_value(id, &value); | |
3157 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
3158 | goto error; | |
3159 | } | |
3160 | lsm.u.id_tracker.u.value = value; | |
3161 | break; | |
3162 | case LTTNG_ID_STRING: | |
3163 | status = lttng_tracker_id_get_string(id, &var_data); | |
3164 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
3165 | goto error; | |
3166 | } | |
3167 | var_data_len = strlen(var_data) + 1; /* Includes \0. */ | |
3168 | lsm.u.id_tracker.u.var_len = var_data_len; | |
3169 | break; | |
3170 | default: | |
3171 | goto error; | |
3172 | } | |
3173 | ||
3174 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
3175 | ||
3176 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
3177 | sizeof(lsm.session.name)); | |
3178 | ||
3179 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( | |
3180 | &lsm, (char *) var_data, var_data_len, NULL); | |
3181 | return ret; | |
3182 | error: | |
3183 | return -LTTNG_ERR_INVALID; | |
3184 | } | |
3185 | ||
3186 | /* | |
3187 | * Add ID to session tracker. | |
3188 | * Return 0 on success else a negative LTTng error code. | |
3189 | */ | |
3190 | int lttng_track_id(struct lttng_handle *handle, | |
3191 | enum lttng_tracker_type tracker_type, | |
3192 | const struct lttng_tracker_id *id) | |
3193 | { | |
3194 | return lttng_track_untrack_id(handle, tracker_type, id, LTTNG_TRACK_ID); | |
3195 | } | |
3196 | ||
3197 | /* | |
3198 | * Remove ID from session tracker. | |
3199 | * Return 0 on success else a negative LTTng error code. | |
3200 | */ | |
3201 | int lttng_untrack_id(struct lttng_handle *handle, | |
3202 | enum lttng_tracker_type tracker_type, | |
3203 | const struct lttng_tracker_id *id) | |
3204 | { | |
3205 | return lttng_track_untrack_id( | |
3206 | handle, tracker_type, id, LTTNG_UNTRACK_ID); | |
3207 | } | |
3208 | ||
3209 | /* | |
3210 | * Add PID to session tracker. | |
3211 | * Return 0 on success else a negative LTTng error code. | |
3212 | */ | |
3213 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
3214 | { | |
3215 | int ret; | |
3216 | struct lttng_tracker_id *id = NULL; | |
3217 | enum lttng_tracker_id_status status; | |
3218 | ||
3219 | id = lttng_tracker_id_create(); | |
3220 | status = lttng_tracker_id_set_value(id, pid); | |
3221 | if (status == LTTNG_TRACKER_ID_STATUS_INVALID) { | |
3222 | ret = -LTTNG_ERR_INVALID; | |
3223 | goto error; | |
3224 | } | |
3225 | ||
3226 | ret = lttng_track_id(handle, LTTNG_TRACKER_PID, id); | |
3227 | error: | |
3228 | lttng_tracker_id_destroy(id); | |
3229 | return ret; | |
3230 | } | |
3231 | ||
3232 | /* | |
3233 | * Remove PID from session tracker. | |
3234 | * Return 0 on success else a negative LTTng error code. | |
3235 | */ | |
3236 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
3237 | { | |
3238 | int ret; | |
3239 | struct lttng_tracker_id *id = NULL; | |
3240 | enum lttng_tracker_id_status status; | |
3241 | ||
3242 | id = lttng_tracker_id_create(); | |
3243 | status = lttng_tracker_id_set_value(id, pid); | |
3244 | if (status == LTTNG_TRACKER_ID_STATUS_INVALID) { | |
3245 | ret = -LTTNG_ERR_INVALID; | |
3246 | goto error; | |
3247 | } | |
3248 | ||
3249 | ret = lttng_untrack_id(handle, LTTNG_TRACKER_PID, id); | |
3250 | error: | |
3251 | lttng_tracker_id_destroy(id); | |
3252 | return ret; | |
3253 | } | |
3254 | ||
fac6795d | 3255 | /* |
9ae110e2 | 3256 | * lib constructor. |
fac6795d | 3257 | */ |
b2b89e8a | 3258 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3259 | { |
3260 | /* Set default session group */ | |
bbccc3d2 | 3261 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3262 | } |
49cca668 DG |
3263 | |
3264 | /* | |
9ae110e2 | 3265 | * lib destructor. |
49cca668 | 3266 | */ |
b2b89e8a | 3267 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3268 | { |
3269 | free(tracing_group); | |
3270 | } |