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> |
5feee503 JG |
46 | #include <lttng/session-internal.h> |
47 | #include <lttng/session-descriptor-internal.h> | |
fac6795d | 48 | |
d00c599e DG |
49 | #include "filter/filter-ast.h" |
50 | #include "filter/filter-parser.h" | |
51 | #include "filter/filter-bytecode.h" | |
52 | #include "filter/memstream.h" | |
cac3069d | 53 | #include "lttng-ctl-helper.h" |
53a80697 MD |
54 | |
55 | #ifdef DEBUG | |
d00c599e | 56 | static const int print_xml = 1; |
53a80697 MD |
57 | #define dbg_printf(fmt, args...) \ |
58 | printf("[debug liblttng-ctl] " fmt, ## args) | |
59 | #else | |
d00c599e | 60 | static const int print_xml = 0; |
53a80697 MD |
61 | #define dbg_printf(fmt, args...) \ |
62 | do { \ | |
63 | /* do nothing but check printf format */ \ | |
64 | if (0) \ | |
65 | printf("[debug liblttnctl] " fmt, ## args); \ | |
66 | } while (0) | |
67 | #endif | |
68 | ||
69 | ||
fac6795d DG |
70 | /* Socket to session daemon for communication */ |
71 | static int sessiond_socket; | |
72 | static char sessiond_sock_path[PATH_MAX]; | |
73 | ||
fac6795d DG |
74 | /* Variables */ |
75 | static char *tracing_group; | |
76 | static int connected; | |
77 | ||
97e19046 DG |
78 | /* Global */ |
79 | ||
80 | /* | |
81 | * Those two variables are used by error.h to silent or control the verbosity of | |
82 | * error message. They are global to the library so application linking with it | |
83 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
84 | */ |
85 | int lttng_opt_quiet; | |
86 | int lttng_opt_verbose; | |
c7e35b03 | 87 | int lttng_opt_mi; |
97e19046 | 88 | |
99497cd0 MD |
89 | /* |
90 | * Copy string from src to dst and enforce null terminated byte. | |
91 | */ | |
cac3069d DG |
92 | LTTNG_HIDDEN |
93 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 94 | { |
e7d6716d | 95 | if (src && dst) { |
99497cd0 MD |
96 | strncpy(dst, src, len); |
97 | /* Enforce the NULL terminated byte */ | |
98 | dst[len - 1] = '\0'; | |
cd80958d DG |
99 | } else if (dst) { |
100 | dst[0] = '\0'; | |
99497cd0 MD |
101 | } |
102 | } | |
103 | ||
fac6795d | 104 | /* |
cd80958d | 105 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 106 | * |
cd80958d DG |
107 | * If domain is unknown, default domain will be the kernel. |
108 | */ | |
cac3069d DG |
109 | LTTNG_HIDDEN |
110 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
111 | struct lttng_domain *src) | |
cd80958d DG |
112 | { |
113 | if (src && dst) { | |
114 | switch (src->type) { | |
00e2e675 DG |
115 | case LTTNG_DOMAIN_KERNEL: |
116 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 117 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 118 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 119 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
120 | memcpy(dst, src, sizeof(struct lttng_domain)); |
121 | break; | |
122 | default: | |
123 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 124 | break; |
cd80958d DG |
125 | } |
126 | } | |
127 | } | |
128 | ||
129 | /* | |
130 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 131 | * |
1c8d13c8 TD |
132 | * On success, returns the number of bytes sent (>=0) |
133 | * On error, returns -1 | |
fac6795d | 134 | */ |
cd80958d | 135 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
136 | { |
137 | int ret; | |
138 | ||
139 | if (!connected) { | |
2f70b271 | 140 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 141 | goto end; |
fac6795d DG |
142 | } |
143 | ||
a4b92340 DG |
144 | DBG("LSM cmd type : %d", lsm->cmd_type); |
145 | ||
be040666 | 146 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 147 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
148 | if (ret < 0) { |
149 | ret = -LTTNG_ERR_FATAL; | |
150 | } | |
e065084a DG |
151 | |
152 | end: | |
153 | return ret; | |
154 | } | |
155 | ||
53a80697 MD |
156 | /* |
157 | * Send var len data to the session daemon. | |
158 | * | |
159 | * On success, returns the number of bytes sent (>=0) | |
160 | * On error, returns -1 | |
161 | */ | |
c2d69327 | 162 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
163 | { |
164 | int ret; | |
165 | ||
166 | if (!connected) { | |
2f70b271 | 167 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
168 | goto end; |
169 | } | |
a4b92340 | 170 | |
53a80697 MD |
171 | if (!data || !len) { |
172 | ret = 0; | |
173 | goto end; | |
174 | } | |
175 | ||
176 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
177 | if (ret < 0) { |
178 | ret = -LTTNG_ERR_FATAL; | |
179 | } | |
53a80697 MD |
180 | |
181 | end: | |
182 | return ret; | |
183 | } | |
184 | ||
a04d53fc FD |
185 | /* |
186 | * Send file descriptors to the session daemon. | |
187 | * | |
188 | * On success, returns the number of bytes sent (>=0) | |
189 | * On error, returns -1 | |
190 | */ | |
191 | static int send_session_fds(const int *fds, size_t nb_fd) | |
192 | { | |
193 | int ret; | |
194 | ||
195 | if (!connected) { | |
196 | ret = -LTTNG_ERR_NO_SESSIOND; | |
197 | goto end; | |
198 | } | |
199 | ||
200 | if (!fds || !nb_fd) { | |
201 | ret = 0; | |
202 | goto end; | |
203 | } | |
204 | ||
205 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
206 | if (ret < 0) { | |
207 | ret = -LTTNG_ERR_FATAL; | |
208 | } | |
209 | ||
210 | end: | |
211 | return ret; | |
212 | } | |
213 | ||
e065084a | 214 | /* |
cd80958d | 215 | * Receive data from the sessiond socket. |
e065084a | 216 | * |
1c8d13c8 TD |
217 | * On success, returns the number of bytes received (>=0) |
218 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 219 | */ |
ca95a216 | 220 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
221 | { |
222 | int ret; | |
223 | ||
224 | if (!connected) { | |
2f70b271 | 225 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 226 | goto end; |
fac6795d DG |
227 | } |
228 | ||
ca95a216 | 229 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
230 | if (ret < 0) { |
231 | ret = -LTTNG_ERR_FATAL; | |
232 | } | |
fac6795d | 233 | |
e065084a | 234 | end: |
fac6795d DG |
235 | return ret; |
236 | } | |
237 | ||
238 | /* | |
9ae110e2 | 239 | * Check if we are in the specified group. |
65beb5ff | 240 | * |
9ae110e2 | 241 | * If yes return 1, else return -1. |
947308c4 | 242 | */ |
6c71277b MD |
243 | LTTNG_HIDDEN |
244 | int lttng_check_tracing_group(void) | |
947308c4 | 245 | { |
6710e5aa | 246 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
247 | int grp_list_size, grp_id, i; |
248 | int ret = -1; | |
6c71277b | 249 | const char *grp_name = tracing_group; |
947308c4 DG |
250 | |
251 | /* Get GID of group 'tracing' */ | |
6710e5aa | 252 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 253 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
254 | goto end; |
255 | } | |
256 | ||
257 | /* Get number of supplementary group IDs */ | |
258 | grp_list_size = getgroups(0, NULL); | |
259 | if (grp_list_size < 0) { | |
6f04ed72 | 260 | PERROR("getgroups"); |
947308c4 DG |
261 | goto end; |
262 | } | |
263 | ||
264 | /* Alloc group list of the right size */ | |
3f451dc0 | 265 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 266 | if (!grp_list) { |
6f04ed72 | 267 | PERROR("malloc"); |
00795392 MD |
268 | goto end; |
269 | } | |
947308c4 | 270 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 271 | if (grp_id < 0) { |
6f04ed72 | 272 | PERROR("getgroups"); |
947308c4 DG |
273 | goto free_list; |
274 | } | |
275 | ||
276 | for (i = 0; i < grp_list_size; i++) { | |
6710e5aa | 277 | if (grp_list[i] == tracing_gid) { |
2269e89e | 278 | ret = 1; |
947308c4 DG |
279 | break; |
280 | } | |
281 | } | |
282 | ||
283 | free_list: | |
284 | free(grp_list); | |
285 | ||
286 | end: | |
287 | return ret; | |
288 | } | |
289 | ||
e3091d6a FD |
290 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
291 | { | |
292 | int ret; | |
293 | long num_cpu; | |
294 | size_t best_mem_info; | |
295 | size_t num_bytes_requested_total; | |
296 | ||
297 | /* | |
298 | * Get the number of CPU currently online to compute the amount of | |
299 | * memory needed to create a buffer for every CPU. | |
300 | */ | |
301 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
302 | if (num_cpu == -1) { | |
303 | goto error; | |
304 | } | |
305 | ||
306 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
307 | ||
308 | /* | |
309 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
310 | * reliable estimate we can get but it is only exposed by the kernel | |
311 | * since 3.14. (See Linux kernel commit: | |
312 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
313 | */ | |
314 | ret = utils_get_memory_available(&best_mem_info); | |
315 | if (ret >= 0) { | |
316 | goto success; | |
317 | } | |
318 | ||
319 | /* | |
320 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
321 | * is a sanity check for obvious user error. | |
322 | */ | |
323 | ret = utils_get_memory_total(&best_mem_info); | |
324 | if (ret >= 0) { | |
325 | goto success; | |
326 | } | |
327 | ||
328 | error: | |
329 | return -1; | |
330 | success: | |
331 | return best_mem_info >= num_bytes_requested_total; | |
332 | } | |
333 | ||
947308c4 | 334 | /* |
2269e89e DG |
335 | * Try connect to session daemon with sock_path. |
336 | * | |
337 | * Return 0 on success, else -1 | |
338 | */ | |
339 | static int try_connect_sessiond(const char *sock_path) | |
340 | { | |
341 | int ret; | |
342 | ||
343 | /* If socket exist, we check if the daemon listens for connect. */ | |
344 | ret = access(sock_path, F_OK); | |
345 | if (ret < 0) { | |
346 | /* Not alive */ | |
2f70b271 | 347 | goto error; |
2269e89e DG |
348 | } |
349 | ||
350 | ret = lttcomm_connect_unix_sock(sock_path); | |
351 | if (ret < 0) { | |
9ae110e2 | 352 | /* Not alive. */ |
2f70b271 | 353 | goto error; |
2269e89e DG |
354 | } |
355 | ||
356 | ret = lttcomm_close_unix_sock(ret); | |
357 | if (ret < 0) { | |
6f04ed72 | 358 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
359 | } |
360 | ||
361 | return 0; | |
2f70b271 DG |
362 | |
363 | error: | |
364 | return -1; | |
2269e89e DG |
365 | } |
366 | ||
367 | /* | |
2f70b271 DG |
368 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
369 | * variable. | |
370 | * | |
371 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
372 | * is somehow too long or ENOMEM). | |
947308c4 DG |
373 | */ |
374 | static int set_session_daemon_path(void) | |
375 | { | |
9ae110e2 | 376 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
377 | uid_t uid; |
378 | ||
379 | uid = getuid(); | |
947308c4 | 380 | |
2269e89e DG |
381 | if (uid != 0) { |
382 | /* Are we in the tracing group ? */ | |
6c71277b | 383 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
384 | } |
385 | ||
08a9c49f | 386 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
387 | lttng_ctl_copy_string(sessiond_sock_path, |
388 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 389 | } |
2269e89e | 390 | |
08a9c49f | 391 | if (uid != 0) { |
c617c0c6 MD |
392 | int ret; |
393 | ||
08a9c49f | 394 | if (in_tgroup) { |
9ae110e2 | 395 | /* Tracing group. */ |
08a9c49f TD |
396 | ret = try_connect_sessiond(sessiond_sock_path); |
397 | if (ret >= 0) { | |
398 | goto end; | |
2269e89e | 399 | } |
08a9c49f | 400 | /* Global session daemon not available... */ |
2269e89e | 401 | } |
08a9c49f TD |
402 | /* ...or not in tracing group (and not root), default */ |
403 | ||
404 | /* | |
9ae110e2 JG |
405 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
406 | * is too small; | |
407 | * With GNU C >= 2.1, snprintf returns the required size | |
408 | * (excluding closing null) | |
08a9c49f TD |
409 | */ |
410 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 411 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 412 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 413 | goto error; |
947308c4 | 414 | } |
947308c4 | 415 | } |
08a9c49f | 416 | end: |
947308c4 | 417 | return 0; |
2f70b271 DG |
418 | |
419 | error: | |
420 | return -1; | |
947308c4 DG |
421 | } |
422 | ||
65beb5ff | 423 | /* |
9ae110e2 | 424 | * Connect to the LTTng session daemon. |
65beb5ff | 425 | * |
9ae110e2 | 426 | * On success, return 0. On error, return -1. |
65beb5ff DG |
427 | */ |
428 | static int connect_sessiond(void) | |
429 | { | |
430 | int ret; | |
431 | ||
da3c9ec1 DG |
432 | /* Don't try to connect if already connected. */ |
433 | if (connected) { | |
434 | return 0; | |
435 | } | |
436 | ||
65beb5ff DG |
437 | ret = set_session_daemon_path(); |
438 | if (ret < 0) { | |
2f70b271 | 439 | goto error; |
65beb5ff DG |
440 | } |
441 | ||
9ae110e2 | 442 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
443 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
444 | if (ret < 0) { | |
2f70b271 | 445 | goto error; |
65beb5ff DG |
446 | } |
447 | ||
448 | sessiond_socket = ret; | |
449 | connected = 1; | |
450 | ||
451 | return 0; | |
2f70b271 DG |
452 | |
453 | error: | |
454 | return -1; | |
65beb5ff DG |
455 | } |
456 | ||
457 | /* | |
1c8d13c8 | 458 | * Clean disconnect from the session daemon. |
9ae110e2 | 459 | * |
1c8d13c8 | 460 | * On success, return 0. On error, return -1. |
65beb5ff DG |
461 | */ |
462 | static int disconnect_sessiond(void) | |
463 | { | |
464 | int ret = 0; | |
465 | ||
466 | if (connected) { | |
467 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
468 | sessiond_socket = 0; | |
469 | connected = 0; | |
470 | } | |
471 | ||
472 | return ret; | |
473 | } | |
474 | ||
795a978d PP |
475 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
476 | size_t *user_len) | |
477 | { | |
478 | int ret = 0; | |
479 | void *buf = NULL; | |
480 | ||
481 | if (len) { | |
482 | if (!user_len) { | |
483 | ret = -LTTNG_ERR_INVALID; | |
484 | goto end; | |
485 | } | |
486 | ||
487 | buf = zmalloc(len); | |
488 | if (!buf) { | |
489 | ret = -ENOMEM; | |
490 | goto end; | |
491 | } | |
492 | ||
493 | ret = recv_data_sessiond(buf, len); | |
494 | if (ret < 0) { | |
495 | goto end; | |
496 | } | |
497 | ||
498 | if (!user_buf) { | |
499 | ret = -LTTNG_ERR_INVALID; | |
500 | goto end; | |
501 | } | |
502 | ||
503 | /* Move ownership of command header buffer to user. */ | |
504 | *user_buf = buf; | |
505 | buf = NULL; | |
506 | *user_len = len; | |
507 | } else { | |
508 | /* No command header. */ | |
509 | if (user_len) { | |
510 | *user_len = 0; | |
511 | } | |
512 | ||
513 | if (user_buf) { | |
514 | *user_buf = NULL; | |
515 | } | |
516 | } | |
517 | ||
518 | end: | |
519 | free(buf); | |
520 | return ret; | |
521 | } | |
522 | ||
35a6fdb7 | 523 | /* |
cd80958d | 524 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
525 | * Takes extra var. len. data and file descriptors as input to send to the |
526 | * session daemon. | |
65beb5ff | 527 | * |
af87c45a | 528 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 529 | */ |
cac3069d | 530 | LTTNG_HIDDEN |
a04d53fc FD |
531 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
532 | const int *fds, size_t nb_fd, const void *vardata, | |
533 | size_t vardata_len, void **user_payload_buf, | |
534 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
535 | { |
536 | int ret; | |
795a978d | 537 | size_t payload_len; |
cd80958d | 538 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
539 | |
540 | ret = connect_sessiond(); | |
541 | if (ret < 0) { | |
2f70b271 | 542 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff DG |
543 | goto end; |
544 | } | |
545 | ||
65beb5ff | 546 | /* Send command to session daemon */ |
cd80958d | 547 | ret = send_session_msg(lsm); |
65beb5ff | 548 | if (ret < 0) { |
2f70b271 | 549 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
550 | goto end; |
551 | } | |
53a80697 | 552 | /* Send var len data */ |
795a978d | 553 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 554 | if (ret < 0) { |
2f70b271 | 555 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
556 | goto end; |
557 | } | |
65beb5ff | 558 | |
a04d53fc FD |
559 | /* Send fds */ |
560 | ret = send_session_fds(fds, nb_fd); | |
561 | if (ret < 0) { | |
562 | /* Ret value is a valid lttng error code. */ | |
563 | goto end; | |
564 | } | |
565 | ||
65beb5ff DG |
566 | /* Get header from data transmission */ |
567 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
568 | if (ret < 0) { | |
2f70b271 | 569 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
570 | goto end; |
571 | } | |
572 | ||
573 | /* Check error code if OK */ | |
f73fabfd | 574 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
575 | ret = -llm.ret_code; |
576 | goto end; | |
577 | } | |
578 | ||
795a978d PP |
579 | /* Get command header from data transmission */ |
580 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
581 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 582 | if (ret < 0) { |
65beb5ff DG |
583 | goto end; |
584 | } | |
585 | ||
795a978d PP |
586 | /* Get payload from data transmission */ |
587 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
588 | &payload_len); | |
589 | if (ret < 0) { | |
83009e5e DG |
590 | goto end; |
591 | } | |
592 | ||
795a978d | 593 | ret = llm.data_size; |
65beb5ff DG |
594 | |
595 | end: | |
596 | disconnect_sessiond(); | |
597 | return ret; | |
598 | } | |
599 | ||
9f19cc17 | 600 | /* |
cd80958d | 601 | * Create lttng handle and return pointer. |
9ae110e2 | 602 | * |
1c8d13c8 | 603 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 604 | */ |
cd80958d DG |
605 | struct lttng_handle *lttng_create_handle(const char *session_name, |
606 | struct lttng_domain *domain) | |
9f19cc17 | 607 | { |
2f70b271 DG |
608 | struct lttng_handle *handle = NULL; |
609 | ||
3f451dc0 | 610 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 611 | if (handle == NULL) { |
2f70b271 | 612 | PERROR("malloc handle"); |
cd80958d DG |
613 | goto end; |
614 | } | |
615 | ||
616 | /* Copy session name */ | |
cac3069d | 617 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
618 | sizeof(handle->session_name)); |
619 | ||
95681498 JG |
620 | /* Copy lttng domain or leave initialized to 0. */ |
621 | if (domain) { | |
622 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
623 | } | |
cd80958d DG |
624 | |
625 | end: | |
626 | return handle; | |
627 | } | |
628 | ||
629 | /* | |
630 | * Destroy handle by free(3) the pointer. | |
631 | */ | |
632 | void lttng_destroy_handle(struct lttng_handle *handle) | |
633 | { | |
0e428499 | 634 | free(handle); |
eb354453 DG |
635 | } |
636 | ||
d9800920 DG |
637 | /* |
638 | * Register an outside consumer. | |
9ae110e2 | 639 | * |
1c8d13c8 | 640 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
641 | */ |
642 | int lttng_register_consumer(struct lttng_handle *handle, | |
643 | const char *socket_path) | |
644 | { | |
645 | struct lttcomm_session_msg lsm; | |
646 | ||
2f70b271 DG |
647 | if (handle == NULL || socket_path == NULL) { |
648 | return -LTTNG_ERR_INVALID; | |
649 | } | |
650 | ||
53efb85a | 651 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 652 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 653 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 654 | sizeof(lsm.session.name)); |
cac3069d | 655 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 656 | |
9ae110e2 JG |
657 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
658 | sizeof(lsm.u.reg.path)); | |
d9800920 | 659 | |
cac3069d | 660 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
661 | } |
662 | ||
1df4dedd | 663 | /* |
9ae110e2 JG |
664 | * Start tracing for all traces of the session. |
665 | * | |
666 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 667 | */ |
6a4f824d | 668 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 669 | { |
cd80958d DG |
670 | struct lttcomm_session_msg lsm; |
671 | ||
6a4f824d | 672 | if (session_name == NULL) { |
2f70b271 | 673 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
674 | } |
675 | ||
53efb85a | 676 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 677 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 678 | |
cac3069d DG |
679 | lttng_ctl_copy_string(lsm.session.name, session_name, |
680 | sizeof(lsm.session.name)); | |
cd80958d | 681 | |
cac3069d | 682 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 683 | } |
1df4dedd DG |
684 | |
685 | /* | |
38ee087f | 686 | * Stop tracing for all traces of the session. |
f3ed775e | 687 | */ |
38ee087f | 688 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 689 | { |
38ee087f | 690 | int ret, data_ret; |
cd80958d DG |
691 | struct lttcomm_session_msg lsm; |
692 | ||
6a4f824d | 693 | if (session_name == NULL) { |
2f70b271 | 694 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
695 | } |
696 | ||
53efb85a | 697 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 698 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 699 | |
cac3069d DG |
700 | lttng_ctl_copy_string(lsm.session.name, session_name, |
701 | sizeof(lsm.session.name)); | |
cd80958d | 702 | |
cac3069d | 703 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
704 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
705 | goto error; | |
706 | } | |
707 | ||
708 | if (!wait) { | |
709 | goto end; | |
710 | } | |
711 | ||
38ee087f DG |
712 | /* Check for data availability */ |
713 | do { | |
6d805429 | 714 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
715 | if (data_ret < 0) { |
716 | /* Return the data available call error. */ | |
717 | ret = data_ret; | |
718 | goto error; | |
719 | } | |
720 | ||
721 | /* | |
9ae110e2 JG |
722 | * Data sleep time before retrying (in usec). Don't sleep if the |
723 | * call returned value indicates availability. | |
38ee087f | 724 | */ |
6d805429 | 725 | if (data_ret) { |
38ee087f | 726 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 727 | } |
6d805429 | 728 | } while (data_ret != 0); |
38ee087f | 729 | |
38ee087f DG |
730 | end: |
731 | error: | |
732 | return ret; | |
733 | } | |
734 | ||
735 | /* | |
736 | * Stop tracing and wait for data availability. | |
737 | */ | |
738 | int lttng_stop_tracing(const char *session_name) | |
739 | { | |
740 | return _lttng_stop_tracing(session_name, 1); | |
741 | } | |
742 | ||
743 | /* | |
744 | * Stop tracing but _don't_ wait for data availability. | |
745 | */ | |
746 | int lttng_stop_tracing_no_wait(const char *session_name) | |
747 | { | |
748 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
749 | } |
750 | ||
751 | /* | |
601d5acf DG |
752 | * Add context to a channel. |
753 | * | |
754 | * If the given channel is NULL, add the contexts to all channels. | |
755 | * The event_name param is ignored. | |
af87c45a DG |
756 | * |
757 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 758 | */ |
cd80958d | 759 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
760 | struct lttng_event_context *ctx, const char *event_name, |
761 | const char *channel_name) | |
d65106b1 | 762 | { |
2001793c JG |
763 | int ret; |
764 | size_t len = 0; | |
765 | char *buf = NULL; | |
cd80958d DG |
766 | struct lttcomm_session_msg lsm; |
767 | ||
9ae110e2 | 768 | /* Safety check. Both are mandatory. */ |
9d697d3d | 769 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
770 | ret = -LTTNG_ERR_INVALID; |
771 | goto end; | |
cd80958d DG |
772 | } |
773 | ||
441c16a7 | 774 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
775 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
776 | ||
85076754 MD |
777 | /* If no channel name, send empty string. */ |
778 | if (channel_name == NULL) { | |
779 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
780 | sizeof(lsm.u.context.channel_name)); | |
781 | } else { | |
782 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
783 | sizeof(lsm.u.context.channel_name)); | |
784 | } | |
cd80958d | 785 | |
cac3069d | 786 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cac3069d | 787 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
788 | sizeof(lsm.session.name)); |
789 | ||
2001793c JG |
790 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
791 | size_t provider_len, ctx_len; | |
792 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
793 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
794 | ||
795 | if (!provider_name || !ctx_name) { | |
796 | ret = -LTTNG_ERR_INVALID; | |
797 | goto end; | |
798 | } | |
799 | ||
800 | provider_len = strlen(provider_name); | |
801 | if (provider_len == 0) { | |
802 | ret = -LTTNG_ERR_INVALID; | |
803 | goto end; | |
804 | } | |
805 | lsm.u.context.provider_name_len = provider_len; | |
806 | ||
807 | ctx_len = strlen(ctx_name); | |
808 | if (ctx_len == 0) { | |
809 | ret = -LTTNG_ERR_INVALID; | |
810 | goto end; | |
811 | } | |
812 | lsm.u.context.context_name_len = ctx_len; | |
813 | ||
814 | len = provider_len + ctx_len; | |
815 | buf = zmalloc(len); | |
816 | if (!buf) { | |
817 | ret = -LTTNG_ERR_NOMEM; | |
818 | goto end; | |
819 | } | |
820 | ||
821 | memcpy(buf, provider_name, provider_len); | |
822 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
823 | } | |
824 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
825 | |
826 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
827 | /* | |
828 | * Don't leak application addresses to the sessiond. | |
829 | * This is only necessary when ctx is for an app ctx otherwise | |
830 | * the values inside the union (type & config) are overwritten. | |
831 | */ | |
832 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
833 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
834 | } | |
2001793c | 835 | |
795a978d | 836 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
837 | end: |
838 | free(buf); | |
839 | return ret; | |
d65106b1 DG |
840 | } |
841 | ||
f3ed775e | 842 | /* |
9ae110e2 JG |
843 | * Enable event(s) for a channel. |
844 | * | |
845 | * If no event name is specified, all events are enabled. | |
846 | * If no channel name is specified, the default 'channel0' is used. | |
847 | * | |
848 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 849 | */ |
cd80958d | 850 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 851 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 852 | { |
f8a96544 JI |
853 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
854 | NULL, 0, NULL); | |
1df4dedd DG |
855 | } |
856 | ||
53a80697 | 857 | /* |
025faf73 | 858 | * Create or enable an event with a filter expression. |
178191b3 | 859 | * |
53a80697 MD |
860 | * Return negative error value on error. |
861 | * Return size of returned session payload data if OK. | |
862 | */ | |
025faf73 | 863 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 864 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
865 | const char *filter_expression) |
866 | { | |
f8a96544 JI |
867 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
868 | filter_expression, 0, NULL); | |
53a80697 MD |
869 | } |
870 | ||
347c5ab5 | 871 | /* |
0e115563 | 872 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
873 | * NULL if not applicable. |
874 | * | |
875 | * An event with NO loglevel and the name is * will return NULL. | |
876 | */ | |
0e115563 | 877 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
878 | { |
879 | int err; | |
0e115563 | 880 | char *agent_filter = NULL; |
347c5ab5 DG |
881 | |
882 | assert(ev); | |
883 | ||
884 | /* Don't add filter for the '*' event. */ | |
9f449915 | 885 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 886 | if (filter) { |
0e115563 | 887 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
888 | ev->name); |
889 | } else { | |
0e115563 | 890 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
891 | } |
892 | if (err < 0) { | |
893 | PERROR("asprintf"); | |
6a556f7b | 894 | goto error; |
347c5ab5 DG |
895 | } |
896 | } | |
897 | ||
898 | /* Add loglevel filtering if any for the JUL domain. */ | |
899 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
900 | char *op; | |
901 | ||
902 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
903 | op = ">="; | |
904 | } else { | |
905 | op = "=="; | |
906 | } | |
907 | ||
0e115563 | 908 | if (filter || agent_filter) { |
6a556f7b JG |
909 | char *new_filter; |
910 | ||
fb0edb23 | 911 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 912 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 913 | ev->loglevel); |
0e115563 DG |
914 | if (agent_filter) { |
915 | free(agent_filter); | |
6a556f7b | 916 | } |
0e115563 | 917 | agent_filter = new_filter; |
347c5ab5 | 918 | } else { |
0e115563 | 919 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
920 | ev->loglevel); |
921 | } | |
922 | if (err < 0) { | |
923 | PERROR("asprintf"); | |
6a556f7b | 924 | goto error; |
347c5ab5 DG |
925 | } |
926 | } | |
927 | ||
0e115563 | 928 | return agent_filter; |
6a556f7b | 929 | error: |
0e115563 | 930 | free(agent_filter); |
6a556f7b | 931 | return NULL; |
347c5ab5 DG |
932 | } |
933 | ||
137b9942 | 934 | /* |
ec166985 | 935 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
936 | * newly allocated parser context in ctxp and populate the lsm object with the |
937 | * expression len. | |
938 | * | |
939 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
940 | */ | |
941 | static int generate_filter(char *filter_expression, | |
942 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
943 | { | |
944 | int ret; | |
945 | struct filter_parser_ctx *ctx = NULL; | |
946 | FILE *fmem = NULL; | |
947 | ||
948 | assert(filter_expression); | |
949 | assert(lsm); | |
950 | assert(ctxp); | |
951 | ||
952 | /* | |
953 | * Casting const to non-const, as the underlying function will use it in | |
954 | * read-only mode. | |
955 | */ | |
956 | fmem = lttng_fmemopen((void *) filter_expression, | |
957 | strlen(filter_expression), "r"); | |
958 | if (!fmem) { | |
959 | fprintf(stderr, "Error opening memory as stream\n"); | |
960 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
961 | goto error; | |
962 | } | |
963 | ctx = filter_parser_ctx_alloc(fmem); | |
964 | if (!ctx) { | |
965 | fprintf(stderr, "Error allocating parser\n"); | |
966 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
967 | goto filter_alloc_error; | |
968 | } | |
969 | ret = filter_parser_ctx_append_ast(ctx); | |
970 | if (ret) { | |
971 | fprintf(stderr, "Parse error\n"); | |
972 | ret = -LTTNG_ERR_FILTER_INVAL; | |
973 | goto parse_error; | |
974 | } | |
137b9942 DG |
975 | if (print_xml) { |
976 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
977 | if (ret) { | |
978 | fflush(stdout); | |
979 | fprintf(stderr, "XML print error\n"); | |
980 | ret = -LTTNG_ERR_FILTER_INVAL; | |
981 | goto parse_error; | |
982 | } | |
983 | } | |
984 | ||
985 | dbg_printf("Generating IR... "); | |
986 | fflush(stdout); | |
987 | ret = filter_visitor_ir_generate(ctx); | |
988 | if (ret) { | |
989 | fprintf(stderr, "Generate IR error\n"); | |
990 | ret = -LTTNG_ERR_FILTER_INVAL; | |
991 | goto parse_error; | |
992 | } | |
993 | dbg_printf("done\n"); | |
994 | ||
995 | dbg_printf("Validating IR... "); | |
996 | fflush(stdout); | |
997 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
998 | if (ret) { | |
999 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1000 | goto parse_error; | |
1001 | } | |
9f449915 PP |
1002 | |
1003 | /* Normalize globbing patterns in the expression. */ | |
1004 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
1005 | if (ret) { | |
1006 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1007 | goto parse_error; | |
1008 | } | |
1009 | ||
9ae110e2 | 1010 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
1011 | ret = filter_visitor_ir_validate_string(ctx); |
1012 | if (ret) { | |
1013 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1014 | goto parse_error; | |
1015 | } | |
9f449915 PP |
1016 | |
1017 | /* Validate globbing patterns in the expression. */ | |
1018 | ret = filter_visitor_ir_validate_globbing(ctx); | |
1019 | if (ret) { | |
1020 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1021 | goto parse_error; | |
1022 | } | |
1023 | ||
137b9942 DG |
1024 | dbg_printf("done\n"); |
1025 | ||
1026 | dbg_printf("Generating bytecode... "); | |
1027 | fflush(stdout); | |
1028 | ret = filter_visitor_bytecode_generate(ctx); | |
1029 | if (ret) { | |
1030 | fprintf(stderr, "Generate bytecode error\n"); | |
1031 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1032 | goto parse_error; | |
1033 | } | |
1034 | dbg_printf("done\n"); | |
1035 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
1036 | bytecode_get_len(&ctx->bytecode->b)); | |
1037 | ||
1038 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1039 | + bytecode_get_len(&ctx->bytecode->b); | |
1040 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
1041 | ||
1042 | /* No need to keep the memory stream. */ | |
1043 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1044 | PERROR("fclose"); |
137b9942 DG |
1045 | } |
1046 | ||
1047 | *ctxp = ctx; | |
1048 | return 0; | |
1049 | ||
1050 | parse_error: | |
137b9942 DG |
1051 | filter_ir_free(ctx); |
1052 | filter_parser_ctx_free(ctx); | |
1053 | filter_alloc_error: | |
1054 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1055 | PERROR("fclose"); |
137b9942 DG |
1056 | } |
1057 | error: | |
1058 | return ret; | |
1059 | } | |
1060 | ||
93deb080 JI |
1061 | /* |
1062 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1063 | * If no event name is specified, all events are enabled. | |
1064 | * If no channel name is specified, the default name is used. | |
1065 | * If filter expression is not NULL, the filter is set for the event. | |
1066 | * If exclusion count is not zero, the exclusions are set for the event. | |
1067 | * Returns size of returned session payload data or a negative error code. | |
1068 | */ | |
1069 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1070 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1071 | const char *original_filter_expression, |
93deb080 JI |
1072 | int exclusion_count, char **exclusion_list) |
1073 | { | |
1074 | struct lttcomm_session_msg lsm; | |
15e37663 JG |
1075 | struct lttng_dynamic_buffer send_buffer; |
1076 | int ret = 0, i, fd_to_send = -1; | |
1077 | bool send_fd = false; | |
137b9942 | 1078 | unsigned int free_filter_expression = 0; |
93deb080 | 1079 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1080 | |
6ea91205 YL |
1081 | /* |
1082 | * We have either a filter or some exclusions, so we need to set up | |
1083 | * a variable-length memory block from where to send the data. | |
1084 | */ | |
1085 | lttng_dynamic_buffer_init(&send_buffer); | |
ec005ec6 | 1086 | |
e9efbcd3 JG |
1087 | /* |
1088 | * Cast as non-const since we may replace the filter expression | |
1089 | * by a dynamically allocated string. Otherwise, the original | |
1090 | * string is not modified. | |
1091 | */ | |
1092 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1093 | |
1094 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1095 | ret = -LTTNG_ERR_INVALID; |
1096 | goto error; | |
93deb080 JI |
1097 | } |
1098 | ||
9ae110e2 JG |
1099 | /* |
1100 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1101 | * anyway, so treat this corner-case early to eliminate |
1102 | * lttng_fmemopen error for 0-byte allocation. | |
1103 | */ | |
1104 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1105 | ret = -LTTNG_ERR_INVALID; |
1106 | goto error; | |
93deb080 JI |
1107 | } |
1108 | ||
1109 | memset(&lsm, 0, sizeof(lsm)); | |
1110 | ||
1111 | /* If no channel name, send empty string. */ | |
1112 | if (channel_name == NULL) { | |
1113 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1114 | sizeof(lsm.u.enable.channel_name)); | |
1115 | } else { | |
1116 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1117 | sizeof(lsm.u.enable.channel_name)); | |
1118 | } | |
1119 | ||
18a720cd MD |
1120 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1121 | if (ev->name[0] == '\0') { | |
1122 | /* Enable all events */ | |
1123 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1124 | } |
93deb080 | 1125 | |
6565421f | 1126 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1127 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1128 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1129 | ||
1130 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1131 | sizeof(lsm.session.name)); | |
1132 | lsm.u.enable.exclusion_count = exclusion_count; | |
1133 | lsm.u.enable.bytecode_len = 0; | |
1134 | ||
9ae110e2 | 1135 | /* Parse filter expression. */ |
5cdb6027 | 1136 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1137 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1138 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1139 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1140 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1141 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1142 | char *agent_filter; | |
64226865 | 1143 | |
347c5ab5 | 1144 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1145 | agent_filter = set_agent_filter(filter_expression, ev); |
1146 | if (!agent_filter) { | |
137b9942 | 1147 | if (!filter_expression) { |
9ae110e2 JG |
1148 | /* |
1149 | * No JUL and no filter, just skip | |
1150 | * everything below. | |
1151 | */ | |
137b9942 DG |
1152 | goto ask_sessiond; |
1153 | } | |
64226865 DG |
1154 | } else { |
1155 | /* | |
9ae110e2 JG |
1156 | * With an agent filter, the original filter has |
1157 | * been added to it thus replace the filter | |
1158 | * expression. | |
64226865 | 1159 | */ |
0e115563 | 1160 | filter_expression = agent_filter; |
e9efbcd3 | 1161 | free_filter_expression = 1; |
9b21e6d5 | 1162 | } |
9b21e6d5 | 1163 | } |
93deb080 | 1164 | |
137b9942 | 1165 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1166 | if (ret) { |
137b9942 | 1167 | goto filter_error; |
93deb080 | 1168 | } |
6b453b5e JG |
1169 | } |
1170 | ||
15e37663 JG |
1171 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1172 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1173 | + lsm.u.enable.expression_len |
1174 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1175 | if (ret) { |
6b453b5e | 1176 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1177 | goto mem_error; |
6b453b5e | 1178 | } |
137b9942 | 1179 | |
9ae110e2 | 1180 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1181 | for (i = 0; i < exclusion_count; i++) { |
1182 | size_t exclusion_len; | |
1183 | ||
1184 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1185 | LTTNG_SYMBOL_NAME_LEN); | |
1186 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1187 | /* Exclusion is not NULL-terminated. */ | |
1188 | ret = -LTTNG_ERR_INVALID; | |
1189 | goto mem_error; | |
1190 | } | |
1191 | ||
1192 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1193 | *(exclusion_list + i), | |
1194 | LTTNG_SYMBOL_NAME_LEN); | |
1195 | if (ret) { | |
1196 | goto mem_error; | |
1197 | } | |
6b453b5e | 1198 | } |
15e37663 | 1199 | |
9ae110e2 | 1200 | /* Add filter expression next. */ |
15e37663 JG |
1201 | if (filter_expression) { |
1202 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1203 | filter_expression, lsm.u.enable.expression_len); | |
1204 | if (ret) { | |
1205 | goto mem_error; | |
1206 | } | |
6b453b5e | 1207 | } |
9ae110e2 | 1208 | /* Add filter bytecode next. */ |
137b9942 | 1209 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1210 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1211 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1212 | if (ret) { | |
1213 | goto mem_error; | |
1214 | } | |
1215 | } | |
1216 | if (ev->extended.ptr) { | |
1217 | struct lttng_event_extended *ev_ext = | |
1218 | (struct lttng_event_extended *) ev->extended.ptr; | |
1219 | ||
1220 | if (ev_ext->probe_location) { | |
1221 | /* | |
1222 | * lttng_userspace_probe_location_serialize returns the | |
1223 | * number of bytes that was appended to the buffer. | |
1224 | */ | |
1225 | ret = lttng_userspace_probe_location_serialize( | |
1226 | ev_ext->probe_location, &send_buffer, | |
1227 | &fd_to_send); | |
56f0bc67 | 1228 | if (ret < 0) { |
15e37663 JG |
1229 | goto mem_error; |
1230 | } | |
1231 | ||
1232 | send_fd = fd_to_send >= 0; | |
1233 | /* | |
1234 | * Set the size of the userspace probe location element | |
1235 | * of the buffer so that the receiving side knows where | |
1236 | * to split it. | |
1237 | */ | |
1238 | lsm.u.enable.userspace_probe_location_len = ret; | |
1239 | } | |
93deb080 JI |
1240 | } |
1241 | ||
15e37663 JG |
1242 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1243 | send_fd ? &fd_to_send : NULL, | |
1244 | send_fd ? 1 : 0, | |
1245 | send_buffer.size ? send_buffer.data : NULL, | |
1246 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1247 | |
7ca1dc6f DG |
1248 | mem_error: |
1249 | if (filter_expression && ctx) { | |
93deb080 JI |
1250 | filter_bytecode_free(ctx); |
1251 | filter_ir_free(ctx); | |
1252 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1253 | } |
1254 | filter_error: | |
1255 | if (free_filter_expression) { | |
1256 | /* | |
9ae110e2 JG |
1257 | * The filter expression has been replaced and must be freed as |
1258 | * it is not the original filter expression received as a | |
1259 | * parameter. | |
7ca1dc6f DG |
1260 | */ |
1261 | free(filter_expression); | |
93deb080 | 1262 | } |
137b9942 DG |
1263 | error: |
1264 | /* | |
9ae110e2 JG |
1265 | * Return directly to the caller and don't ask the sessiond since |
1266 | * something went wrong in the parsing of data above. | |
137b9942 | 1267 | */ |
15e37663 | 1268 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1269 | return ret; |
3e1c9ff7 DG |
1270 | |
1271 | ask_sessiond: | |
1272 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1273 | return ret; | |
93deb080 JI |
1274 | } |
1275 | ||
6e911cad MD |
1276 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1277 | struct lttng_event *ev, const char *channel_name, | |
1278 | const char *original_filter_expression) | |
1df4dedd | 1279 | { |
cd80958d | 1280 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1281 | char *varlen_data; |
1282 | int ret = 0; | |
1283 | unsigned int free_filter_expression = 0; | |
1284 | struct filter_parser_ctx *ctx = NULL; | |
1285 | /* | |
1286 | * Cast as non-const since we may replace the filter expression | |
1287 | * by a dynamically allocated string. Otherwise, the original | |
1288 | * string is not modified. | |
1289 | */ | |
1290 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1291 | |
6e911cad MD |
1292 | if (handle == NULL || ev == NULL) { |
1293 | ret = -LTTNG_ERR_INVALID; | |
1294 | goto error; | |
1295 | } | |
1296 | ||
9ae110e2 JG |
1297 | /* |
1298 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1299 | * anyway, so treat this corner-case early to eliminate |
1300 | * lttng_fmemopen error for 0-byte allocation. | |
1301 | */ | |
1302 | if (filter_expression && filter_expression[0] == '\0') { | |
1303 | ret = -LTTNG_ERR_INVALID; | |
1304 | goto error; | |
cd80958d DG |
1305 | } |
1306 | ||
441c16a7 MD |
1307 | memset(&lsm, 0, sizeof(lsm)); |
1308 | ||
85076754 MD |
1309 | /* If no channel name, send empty string. */ |
1310 | if (channel_name == NULL) { | |
1311 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1312 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1313 | } else { |
85076754 | 1314 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1315 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1316 | } |
1317 | ||
18a720cd | 1318 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1319 | |
6e911cad MD |
1320 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1321 | /* FIXME: copying non-packed struct to packed struct. */ | |
1322 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1323 | ||
cac3069d | 1324 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1325 | sizeof(lsm.session.name)); |
6e911cad | 1326 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1327 | |
6e911cad MD |
1328 | /* |
1329 | * For the JUL domain, a filter is enforced except for the | |
1330 | * disable all event. This is done to avoid having the event in | |
1331 | * all sessions thus filtering by logger name. | |
1332 | */ | |
1333 | if (filter_expression == NULL && | |
1334 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1335 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1336 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1337 | goto ask_sessiond; |
1338 | } | |
1339 | ||
1340 | /* | |
1341 | * We have a filter, so we need to set up a variable-length | |
1342 | * memory block from where to send the data. | |
1343 | */ | |
1344 | ||
1345 | /* Parse filter expression */ | |
1346 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1347 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1348 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1349 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1350 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1351 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1352 | char *agent_filter; | |
6e911cad MD |
1353 | |
1354 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1355 | agent_filter = set_agent_filter(filter_expression, ev); |
1356 | if (!agent_filter) { | |
6e911cad | 1357 | if (!filter_expression) { |
9ae110e2 JG |
1358 | /* |
1359 | * No JUL and no filter, just skip | |
1360 | * everything below. | |
1361 | */ | |
6e911cad MD |
1362 | goto ask_sessiond; |
1363 | } | |
1364 | } else { | |
1365 | /* | |
9ae110e2 JG |
1366 | * With a JUL filter, the original filter has |
1367 | * been added to it thus replace the filter | |
1368 | * expression. | |
6e911cad | 1369 | */ |
0e115563 | 1370 | filter_expression = agent_filter; |
6e911cad MD |
1371 | free_filter_expression = 1; |
1372 | } | |
1373 | } | |
1374 | ||
1375 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1376 | if (ret) { | |
1377 | goto filter_error; | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1382 | + lsm.u.disable.expression_len); | |
1383 | if (!varlen_data) { | |
1384 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1385 | goto mem_error; | |
1386 | } | |
1387 | ||
9ae110e2 | 1388 | /* Add filter expression. */ |
6e911cad MD |
1389 | if (lsm.u.disable.expression_len != 0) { |
1390 | memcpy(varlen_data, | |
1391 | filter_expression, | |
1392 | lsm.u.disable.expression_len); | |
1393 | } | |
9ae110e2 | 1394 | /* Add filter bytecode next. */ |
6e911cad MD |
1395 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1396 | memcpy(varlen_data | |
1397 | + lsm.u.disable.expression_len, | |
1398 | &ctx->bytecode->b, | |
1399 | lsm.u.disable.bytecode_len); | |
1400 | } | |
1401 | ||
795a978d | 1402 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1403 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1404 | free(varlen_data); | |
1405 | ||
1406 | mem_error: | |
1407 | if (filter_expression && ctx) { | |
1408 | filter_bytecode_free(ctx); | |
1409 | filter_ir_free(ctx); | |
1410 | filter_parser_ctx_free(ctx); | |
1411 | } | |
1412 | filter_error: | |
1413 | if (free_filter_expression) { | |
1414 | /* | |
9ae110e2 JG |
1415 | * The filter expression has been replaced and must be freed as |
1416 | * it is not the original filter expression received as a | |
1417 | * parameter. | |
6e911cad MD |
1418 | */ |
1419 | free(filter_expression); | |
1420 | } | |
1421 | error: | |
1422 | /* | |
9ae110e2 JG |
1423 | * Return directly to the caller and don't ask the sessiond since |
1424 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1425 | */ |
1426 | return ret; | |
1427 | ||
1428 | ask_sessiond: | |
1429 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1430 | return ret; | |
1431 | } | |
1432 | ||
1433 | /* | |
9ae110e2 JG |
1434 | * Disable event(s) of a channel and domain. |
1435 | * If no event name is specified, all events are disabled. | |
1436 | * If no channel name is specified, the default 'channel0' is used. | |
1437 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1438 | */ |
1439 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1440 | const char *channel_name) | |
1441 | { | |
1442 | struct lttng_event ev; | |
1443 | ||
1444 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1445 | ev.loglevel = -1; |
6e911cad MD |
1446 | ev.type = LTTNG_EVENT_ALL; |
1447 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1448 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1449 | } |
1450 | ||
cf0bcb51 JG |
1451 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1452 | { | |
1453 | struct lttng_channel *channel = NULL; | |
1454 | struct lttng_channel_extended *extended = NULL; | |
1455 | ||
1456 | if (!domain) { | |
1457 | goto error; | |
1458 | } | |
1459 | ||
1460 | /* Validate domain. */ | |
1461 | switch (domain->type) { | |
1462 | case LTTNG_DOMAIN_UST: | |
1463 | switch (domain->buf_type) { | |
1464 | case LTTNG_BUFFER_PER_UID: | |
1465 | case LTTNG_BUFFER_PER_PID: | |
1466 | break; | |
1467 | default: | |
1468 | goto error; | |
1469 | } | |
1470 | break; | |
1471 | case LTTNG_DOMAIN_KERNEL: | |
1472 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1473 | goto error; | |
1474 | } | |
1475 | break; | |
1476 | default: | |
1477 | goto error; | |
1478 | } | |
1479 | ||
1480 | channel = zmalloc(sizeof(*channel)); | |
1481 | if (!channel) { | |
1482 | goto error; | |
1483 | } | |
1484 | ||
1485 | extended = zmalloc(sizeof(*extended)); | |
1486 | if (!extended) { | |
1487 | goto error; | |
1488 | } | |
1489 | ||
1490 | channel->attr.extended.ptr = extended; | |
1491 | ||
1492 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1493 | return channel; | |
1494 | error: | |
1495 | free(channel); | |
1496 | free(extended); | |
1497 | return NULL; | |
1498 | } | |
1499 | ||
1500 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1501 | { | |
1502 | if (!channel) { | |
1503 | return; | |
1504 | } | |
1505 | ||
1506 | if (channel->attr.extended.ptr) { | |
1507 | free(channel->attr.extended.ptr); | |
1508 | } | |
1509 | free(channel); | |
1510 | } | |
1511 | ||
1df4dedd | 1512 | /* |
9ae110e2 JG |
1513 | * Enable channel per domain |
1514 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1515 | */ |
cd80958d | 1516 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1517 | struct lttng_channel *in_chan) |
a5c5a2bd | 1518 | { |
cd80958d | 1519 | struct lttcomm_session_msg lsm; |
e3091d6a | 1520 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1521 | |
9ae110e2 | 1522 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1523 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1524 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1525 | } |
1526 | ||
441c16a7 | 1527 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1528 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1529 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1530 | |
cf0bcb51 JG |
1531 | if (!in_chan->attr.extended.ptr) { |
1532 | struct lttng_channel *channel; | |
1533 | struct lttng_channel_extended *extended; | |
7d29a247 | 1534 | |
cf0bcb51 JG |
1535 | channel = lttng_channel_create(&handle->domain); |
1536 | if (!channel) { | |
1537 | return -LTTNG_ERR_NOMEM; | |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * Create a new channel in order to use default extended | |
1542 | * attribute values. | |
1543 | */ | |
1544 | extended = (struct lttng_channel_extended *) | |
1545 | channel->attr.extended.ptr; | |
1546 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1547 | lttng_channel_destroy(channel); | |
1548 | } else { | |
1549 | struct lttng_channel_extended *extended; | |
1550 | ||
1551 | extended = (struct lttng_channel_extended *) | |
1552 | in_chan->attr.extended.ptr; | |
1553 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1554 | } | |
cd80958d | 1555 | |
e3091d6a FD |
1556 | /* |
1557 | * Verify that the amount of memory required to create the requested | |
1558 | * buffer is available on the system at the moment. | |
1559 | */ | |
1560 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1561 | lsm.u.channel.chan.attr.subbuf_size; | |
1562 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1563 | return -LTTNG_ERR_NOMEM; | |
1564 | } | |
1565 | ||
cf0bcb51 | 1566 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
cac3069d | 1567 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1568 | |
cac3069d | 1569 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1570 | sizeof(lsm.session.name)); |
1571 | ||
cac3069d | 1572 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1573 | } |
1df4dedd | 1574 | |
2ef84c95 | 1575 | /* |
9ae110e2 JG |
1576 | * All tracing will be stopped for registered events of the channel. |
1577 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1578 | */ |
cd80958d | 1579 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1580 | { |
cd80958d DG |
1581 | struct lttcomm_session_msg lsm; |
1582 | ||
9ae110e2 | 1583 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1584 | if (handle == NULL || name == NULL) { |
2f70b271 | 1585 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1586 | } |
1587 | ||
441c16a7 MD |
1588 | memset(&lsm, 0, sizeof(lsm)); |
1589 | ||
cd80958d | 1590 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1591 | |
cac3069d | 1592 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1593 | sizeof(lsm.u.disable.channel_name)); |
1594 | ||
cac3069d | 1595 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1596 | |
cac3069d | 1597 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1598 | sizeof(lsm.session.name)); |
1599 | ||
cac3069d | 1600 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1601 | } |
1602 | ||
ccf10263 | 1603 | /* |
9ae110e2 JG |
1604 | * Add PID to session tracker. |
1605 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1606 | */ |
1607 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1608 | { | |
1609 | struct lttcomm_session_msg lsm; | |
1610 | ||
9ae110e2 | 1611 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1612 | if (handle == NULL) { |
1613 | return -LTTNG_ERR_INVALID; | |
1614 | } | |
1615 | ||
1616 | memset(&lsm, 0, sizeof(lsm)); | |
1617 | ||
1618 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1619 | lsm.u.pid_tracker.pid = pid; | |
1620 | ||
1621 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1622 | ||
1623 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1624 | sizeof(lsm.session.name)); | |
1625 | ||
1626 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1627 | } | |
1628 | ||
1629 | /* | |
9ae110e2 JG |
1630 | * Remove PID from session tracker. |
1631 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1632 | */ |
1633 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1634 | { | |
1635 | struct lttcomm_session_msg lsm; | |
1636 | ||
9ae110e2 | 1637 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1638 | if (handle == NULL) { |
1639 | return -LTTNG_ERR_INVALID; | |
1640 | } | |
1641 | ||
1642 | memset(&lsm, 0, sizeof(lsm)); | |
1643 | ||
1644 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1645 | lsm.u.pid_tracker.pid = pid; | |
1646 | ||
1647 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1648 | ||
1649 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1650 | sizeof(lsm.session.name)); | |
1651 | ||
1652 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1653 | } | |
1654 | ||
fac6795d | 1655 | /* |
9ae110e2 JG |
1656 | * Lists all available tracepoints of domain. |
1657 | * Sets the contents of the events array. | |
1658 | * Returns the number of lttng_event entries in events; | |
1659 | * on error, returns a negative value. | |
fac6795d | 1660 | */ |
cd80958d | 1661 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1662 | struct lttng_event **events) |
fac6795d | 1663 | { |
052da939 | 1664 | int ret; |
cd80958d DG |
1665 | struct lttcomm_session_msg lsm; |
1666 | ||
9d697d3d | 1667 | if (handle == NULL) { |
2f70b271 | 1668 | return -LTTNG_ERR_INVALID; |
cd80958d | 1669 | } |
fac6795d | 1670 | |
53efb85a | 1671 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1672 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1673 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1674 | |
cac3069d | 1675 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1676 | if (ret < 0) { |
1677 | return ret; | |
eb354453 | 1678 | } |
fac6795d | 1679 | |
9f19cc17 | 1680 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1681 | } |
1682 | ||
f37d259d | 1683 | /* |
9ae110e2 JG |
1684 | * Lists all available tracepoint fields of domain. |
1685 | * Sets the contents of the event field array. | |
1686 | * Returns the number of lttng_event_field entries in events; | |
1687 | * on error, returns a negative value. | |
f37d259d MD |
1688 | */ |
1689 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1690 | struct lttng_event_field **fields) | |
1691 | { | |
1692 | int ret; | |
1693 | struct lttcomm_session_msg lsm; | |
1694 | ||
1695 | if (handle == NULL) { | |
2f70b271 | 1696 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1697 | } |
1698 | ||
53efb85a | 1699 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1700 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1701 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1702 | |
cac3069d | 1703 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1704 | if (ret < 0) { |
1705 | return ret; | |
1706 | } | |
1707 | ||
1708 | return ret / sizeof(struct lttng_event_field); | |
1709 | } | |
1710 | ||
834978fd | 1711 | /* |
9ae110e2 JG |
1712 | * Lists all available kernel system calls. Allocates and sets the contents of |
1713 | * the events array. | |
834978fd | 1714 | * |
9ae110e2 JG |
1715 | * Returns the number of lttng_event entries in events; on error, returns a |
1716 | * negative value. | |
834978fd DG |
1717 | */ |
1718 | int lttng_list_syscalls(struct lttng_event **events) | |
1719 | { | |
1720 | int ret; | |
1721 | struct lttcomm_session_msg lsm; | |
1722 | ||
1723 | if (!events) { | |
1724 | return -LTTNG_ERR_INVALID; | |
1725 | } | |
1726 | ||
1727 | memset(&lsm, 0, sizeof(lsm)); | |
1728 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1729 | /* Force kernel domain for system calls. */ | |
1730 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1731 | ||
1732 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1733 | if (ret < 0) { | |
1734 | return ret; | |
1735 | } | |
1736 | ||
1737 | return ret / sizeof(struct lttng_event); | |
1738 | } | |
1739 | ||
1657e9bb | 1740 | /* |
9ae110e2 JG |
1741 | * Returns a human readable string describing |
1742 | * the error code (a negative value). | |
1657e9bb | 1743 | */ |
9a745bc7 | 1744 | const char *lttng_strerror(int code) |
1657e9bb | 1745 | { |
f73fabfd | 1746 | return error_get_str(code); |
1657e9bb DG |
1747 | } |
1748 | ||
5feee503 JG |
1749 | enum lttng_error_code lttng_create_session_ext( |
1750 | struct lttng_session_descriptor *session_descriptor) | |
1751 | { | |
1752 | enum lttng_error_code ret_code; | |
1753 | struct lttcomm_session_msg lsm = { | |
1754 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1755 | }; | |
1756 | void *reply = NULL; | |
1757 | struct lttng_buffer_view reply_view; | |
1758 | int reply_ret; | |
1759 | bool sessiond_must_generate_ouput; | |
1760 | struct lttng_dynamic_buffer payload; | |
1761 | int ret; | |
1762 | size_t descriptor_size; | |
1763 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1764 | ||
1765 | lttng_dynamic_buffer_init(&payload); | |
1766 | if (!session_descriptor) { | |
1767 | ret_code = LTTNG_ERR_INVALID; | |
1768 | goto end; | |
1769 | } | |
1770 | ||
1771 | sessiond_must_generate_ouput = | |
1772 | !lttng_session_descriptor_is_output_destination_initialized( | |
1773 | session_descriptor); | |
1774 | if (sessiond_must_generate_ouput) { | |
1775 | const char *home_dir = utils_get_home_dir(); | |
1776 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1777 | ||
1778 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1779 | ret_code = LTTNG_ERR_FATAL; | |
1780 | goto end; | |
1781 | } | |
1782 | ||
1783 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1784 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1785 | home_dir_len); | |
1786 | if (ret) { | |
1787 | ret_code = LTTNG_ERR_NOMEM; | |
1788 | goto end; | |
1789 | } | |
1790 | } | |
1791 | ||
1792 | descriptor_size = payload.size; | |
1793 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1794 | &payload); | |
1795 | if (ret) { | |
1796 | ret_code = LTTNG_ERR_INVALID; | |
1797 | goto end; | |
1798 | } | |
1799 | descriptor_size = payload.size - descriptor_size; | |
1800 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1801 | ||
1802 | /* Command returns a session descriptor on success. */ | |
1803 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1804 | payload.size, &reply); | |
1805 | if (reply_ret < 0) { | |
1806 | ret_code = -reply_ret; | |
1807 | goto end; | |
1808 | } else if (reply_ret == 0) { | |
1809 | /* Socket unexpectedly closed by the session daemon. */ | |
1810 | ret_code = LTTNG_ERR_FATAL; | |
1811 | goto end; | |
1812 | } | |
1813 | ||
1814 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1815 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1816 | &descriptor_reply); | |
1817 | if (ret < 0) { | |
1818 | ret_code = LTTNG_ERR_FATAL; | |
1819 | goto end; | |
1820 | } | |
1821 | ret_code = LTTNG_OK; | |
1822 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1823 | end: | |
1824 | free(reply); | |
1825 | lttng_dynamic_buffer_reset(&payload); | |
1826 | lttng_session_descriptor_destroy(descriptor_reply); | |
1827 | return ret_code; | |
1828 | } | |
1829 | ||
aaf97519 | 1830 | /* |
5feee503 | 1831 | * Create a new session using name and url for destination. |
a4b92340 | 1832 | * |
f73fabfd | 1833 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1834 | */ |
a4b92340 | 1835 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1836 | { |
3dd05a85 | 1837 | int ret; |
a4b92340 | 1838 | ssize_t size; |
a4b92340 | 1839 | struct lttng_uri *uris = NULL; |
5feee503 JG |
1840 | struct lttng_session_descriptor *descriptor = NULL; |
1841 | enum lttng_error_code ret_code; | |
00e2e675 | 1842 | |
5feee503 JG |
1843 | if (!name) { |
1844 | ret = -LTTNG_ERR_INVALID; | |
1845 | goto end; | |
00e2e675 DG |
1846 | } |
1847 | ||
bc894455 | 1848 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1849 | if (size < 0) { |
5feee503 JG |
1850 | ret = -LTTNG_ERR_INVALID; |
1851 | goto end; | |
1852 | } | |
1853 | switch (size) { | |
1854 | case 0: | |
1855 | descriptor = lttng_session_descriptor_create(name); | |
1856 | break; | |
1857 | case 1: | |
1858 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1859 | ret = -LTTNG_ERR_INVALID; | |
1860 | goto end; | |
1861 | } | |
1862 | descriptor = lttng_session_descriptor_local_create(name, | |
1863 | uris[0].dst.path); | |
1864 | break; | |
1865 | case 2: | |
1866 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1867 | NULL); | |
1868 | break; | |
1869 | default: | |
1870 | ret = -LTTNG_ERR_INVALID; | |
1871 | goto end; | |
1872 | } | |
1873 | if (!descriptor) { | |
1874 | ret = -LTTNG_ERR_INVALID; | |
1875 | goto end; | |
00e2e675 | 1876 | } |
5feee503 JG |
1877 | ret_code = lttng_create_session_ext(descriptor); |
1878 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1879 | end: | |
1880 | lttng_session_descriptor_destroy(descriptor); | |
1881 | free(uris); | |
1882 | return ret; | |
1883 | } | |
00e2e675 | 1884 | |
5feee503 JG |
1885 | /* |
1886 | * Create a session exclusively used for snapshot. | |
1887 | * | |
1888 | * Returns LTTNG_OK on success or a negative error code. | |
1889 | */ | |
1890 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1891 | { | |
1892 | int ret; | |
1893 | enum lttng_error_code ret_code; | |
1894 | ssize_t size; | |
1895 | struct lttng_uri *uris = NULL; | |
1896 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1897 | |
5feee503 JG |
1898 | if (!name) { |
1899 | ret = -LTTNG_ERR_INVALID; | |
1900 | goto end; | |
1901 | } | |
1902 | ||
1903 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1904 | if (size < 0) { | |
1905 | ret = -LTTNG_ERR_INVALID; | |
1906 | goto end; | |
1907 | } | |
1908 | /* | |
1909 | * If the user does not specify a custom subdir, use the session name. | |
1910 | */ | |
1911 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1912 | strlen(uris[0].subdir) == 0) { | |
1913 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1914 | name); | |
1915 | if (ret < 0) { | |
1916 | PERROR("Failed to set session name as network destination sub-directory"); | |
1917 | ret = -LTTNG_ERR_FATAL; | |
1918 | goto end; | |
1919 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1920 | /* Truncated output. */ | |
1921 | ret = -LTTNG_ERR_INVALID; | |
1922 | goto end; | |
1923 | } | |
1924 | } | |
3dd05a85 | 1925 | |
5feee503 JG |
1926 | switch (size) { |
1927 | case 0: | |
1928 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1929 | break; | |
1930 | case 1: | |
1931 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1932 | ret = -LTTNG_ERR_INVALID; | |
1933 | goto end; | |
1934 | } | |
1935 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1936 | name, | |
1937 | uris[0].dst.path); | |
1938 | break; | |
1939 | case 2: | |
1940 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1941 | name, | |
1942 | snapshot_url, | |
1943 | NULL); | |
1944 | break; | |
1945 | default: | |
1946 | ret = -LTTNG_ERR_INVALID; | |
1947 | goto end; | |
1948 | } | |
1949 | if (!descriptor) { | |
1950 | ret = -LTTNG_ERR_INVALID; | |
1951 | goto end; | |
1952 | } | |
1953 | ret_code = lttng_create_session_ext(descriptor); | |
1954 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1955 | end: | |
1956 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1957 | free(uris); |
1958 | return ret; | |
00e2e675 DG |
1959 | } |
1960 | ||
5feee503 JG |
1961 | /* |
1962 | * Create a session exclusively used for live. | |
1963 | * | |
1964 | * Returns LTTNG_OK on success or a negative error code. | |
1965 | */ | |
1966 | int lttng_create_session_live(const char *name, const char *url, | |
1967 | unsigned int timer_interval) | |
1968 | { | |
1969 | int ret; | |
1970 | enum lttng_error_code ret_code; | |
1971 | struct lttng_session_descriptor *descriptor = NULL; | |
1972 | ||
1973 | if (!name) { | |
1974 | ret = -LTTNG_ERR_INVALID; | |
1975 | goto end; | |
1976 | } | |
1977 | ||
1978 | if (url) { | |
1979 | descriptor = lttng_session_descriptor_live_network_create( | |
1980 | name, url, NULL, timer_interval); | |
1981 | } else { | |
1982 | descriptor = lttng_session_descriptor_live_create( | |
1983 | name, timer_interval); | |
1984 | } | |
1985 | if (!descriptor) { | |
1986 | ret = -LTTNG_ERR_INVALID; | |
1987 | goto end; | |
1988 | } | |
1989 | ret_code = lttng_create_session_ext(descriptor); | |
1990 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1991 | end: | |
1992 | lttng_session_descriptor_destroy(descriptor); | |
1993 | return ret; | |
1994 | } | |
1995 | ||
8028d920 | 1996 | /* |
9ae110e2 JG |
1997 | * Destroy session using name. |
1998 | * Returns size of returned session payload data or a negative error code. | |
8028d920 | 1999 | */ |
8fd2c92c | 2000 | static |
e20ee7c2 | 2001 | int _lttng_destroy_session(const char *session_name) |
8028d920 | 2002 | { |
cd80958d DG |
2003 | struct lttcomm_session_msg lsm; |
2004 | ||
843f5df9 | 2005 | if (session_name == NULL) { |
2f70b271 | 2006 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
2007 | } |
2008 | ||
53efb85a | 2009 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2010 | lsm.cmd_type = LTTNG_DESTROY_SESSION; |
843f5df9 | 2011 | |
cac3069d DG |
2012 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2013 | sizeof(lsm.session.name)); | |
cd80958d | 2014 | |
cac3069d | 2015 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
aaf97519 DG |
2016 | } |
2017 | ||
e20ee7c2 JD |
2018 | /* |
2019 | * Stop the session and wait for the data before destroying it | |
2020 | */ | |
2021 | int lttng_destroy_session(const char *session_name) | |
2022 | { | |
2023 | int ret; | |
2024 | ||
2025 | /* | |
2026 | * Stop the tracing and wait for the data. | |
2027 | */ | |
2028 | ret = _lttng_stop_tracing(session_name, 1); | |
2029 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2030 | goto end; | |
2031 | } | |
2032 | ||
2033 | ret = _lttng_destroy_session(session_name); | |
2034 | end: | |
2035 | return ret; | |
2036 | } | |
2037 | ||
2038 | /* | |
2039 | * Destroy the session without waiting for the data. | |
2040 | */ | |
2041 | int lttng_destroy_session_no_wait(const char *session_name) | |
2042 | { | |
2043 | int ret; | |
2044 | ||
2045 | /* | |
2046 | * Stop the tracing without waiting for the data. | |
2047 | * The session might already have been stopped, so just | |
2048 | * skip this error. | |
2049 | */ | |
2050 | ret = _lttng_stop_tracing(session_name, 0); | |
2051 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2052 | goto end; | |
2053 | } | |
2054 | ||
2055 | ret = _lttng_destroy_session(session_name); | |
2056 | end: | |
2057 | return ret; | |
2058 | } | |
2059 | ||
57167058 | 2060 | /* |
9ae110e2 JG |
2061 | * Ask the session daemon for all available sessions. |
2062 | * Sets the contents of the sessions array. | |
2063 | * Returns the number of lttng_session entries in sessions; | |
2064 | * on error, returns a negative value. | |
57167058 | 2065 | */ |
5feee503 | 2066 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2067 | { |
ca95a216 | 2068 | int ret; |
cd80958d | 2069 | struct lttcomm_session_msg lsm; |
5feee503 JG |
2070 | const size_t session_size = sizeof(struct lttng_session) + |
2071 | sizeof(struct lttng_session_extended); | |
2072 | size_t session_count, i; | |
2073 | struct lttng_session_extended *sessions_extended_begin; | |
2074 | struct lttng_session *sessions = NULL; | |
57167058 | 2075 | |
53efb85a | 2076 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2077 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
5feee503 JG |
2078 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2079 | if (ret <= 0) { | |
5feee503 JG |
2080 | goto end; |
2081 | } | |
2082 | if (!sessions) { | |
2083 | ret = -LTTNG_ERR_FATAL; | |
2084 | goto end; | |
2085 | } | |
2086 | ||
2087 | if (ret % session_size) { | |
2088 | ret = -LTTNG_ERR_UNK; | |
2089 | free(sessions); | |
2090 | *out_sessions = NULL; | |
2091 | goto end; | |
57167058 | 2092 | } |
5feee503 JG |
2093 | session_count = (size_t) ret / session_size; |
2094 | sessions_extended_begin = (struct lttng_session_extended *) | |
2095 | (&sessions[session_count]); | |
57167058 | 2096 | |
5feee503 JG |
2097 | /* Set extended session info pointers. */ |
2098 | for (i = 0; i < session_count; i++) { | |
2099 | struct lttng_session *session = &sessions[i]; | |
2100 | struct lttng_session_extended *extended = | |
2101 | &(sessions_extended_begin[i]); | |
2102 | ||
2103 | session->extended.ptr = extended; | |
2104 | } | |
2105 | ||
2106 | ret = (int) session_count; | |
2107 | *out_sessions = sessions; | |
2108 | end: | |
2109 | return ret; | |
2110 | } | |
2111 | ||
2112 | enum lttng_error_code lttng_session_get_creation_time( | |
2113 | const struct lttng_session *session, uint64_t *creation_time) | |
2114 | { | |
2115 | enum lttng_error_code ret = LTTNG_OK; | |
2116 | struct lttng_session_extended *extended; | |
2117 | ||
2118 | if (!session || !creation_time || !session->extended.ptr) { | |
2119 | ret = LTTNG_ERR_INVALID; | |
2120 | goto end; | |
2121 | } | |
2122 | ||
2123 | extended = session->extended.ptr; | |
2124 | if (!extended->creation_time.is_set) { | |
2125 | /* Not created on the session daemon yet. */ | |
2126 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2127 | goto end; | |
2128 | } | |
2129 | *creation_time = extended->creation_time.value; | |
2130 | end: | |
2131 | return ret; | |
57167058 DG |
2132 | } |
2133 | ||
d7ba1388 MD |
2134 | int lttng_set_session_shm_path(const char *session_name, |
2135 | const char *shm_path) | |
2136 | { | |
2137 | struct lttcomm_session_msg lsm; | |
2138 | ||
2139 | if (session_name == NULL) { | |
2140 | return -LTTNG_ERR_INVALID; | |
2141 | } | |
2142 | ||
2143 | memset(&lsm, 0, sizeof(lsm)); | |
2144 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2145 | ||
2146 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2147 | sizeof(lsm.session.name)); | |
2148 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
2149 | sizeof(lsm.u.set_shm_path.shm_path)); | |
2150 | ||
2151 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
2152 | } | |
2153 | ||
9f19cc17 | 2154 | /* |
9ae110e2 JG |
2155 | * Ask the session daemon for all available domains of a session. |
2156 | * Sets the contents of the domains array. | |
2157 | * Returns the number of lttng_domain entries in domains; | |
2158 | * on error, returns a negative value. | |
9f19cc17 | 2159 | */ |
330be774 | 2160 | int lttng_list_domains(const char *session_name, |
cd80958d | 2161 | struct lttng_domain **domains) |
9f19cc17 DG |
2162 | { |
2163 | int ret; | |
cd80958d DG |
2164 | struct lttcomm_session_msg lsm; |
2165 | ||
330be774 | 2166 | if (session_name == NULL) { |
2f70b271 | 2167 | return -LTTNG_ERR_INVALID; |
cd80958d | 2168 | } |
9f19cc17 | 2169 | |
53efb85a | 2170 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2171 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2172 | ||
cac3069d DG |
2173 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2174 | sizeof(lsm.session.name)); | |
cd80958d | 2175 | |
cac3069d | 2176 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
2177 | if (ret < 0) { |
2178 | return ret; | |
2179 | } | |
2180 | ||
2181 | return ret / sizeof(struct lttng_domain); | |
2182 | } | |
2183 | ||
2184 | /* | |
9ae110e2 JG |
2185 | * Ask the session daemon for all available channels of a session. |
2186 | * Sets the contents of the channels array. | |
2187 | * Returns the number of lttng_channel entries in channels; | |
2188 | * on error, returns a negative value. | |
9f19cc17 | 2189 | */ |
cd80958d DG |
2190 | int lttng_list_channels(struct lttng_handle *handle, |
2191 | struct lttng_channel **channels) | |
9f19cc17 DG |
2192 | { |
2193 | int ret; | |
53e367f9 JG |
2194 | size_t channel_count, i; |
2195 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2196 | sizeof(struct lttng_channel_extended); |
cd80958d | 2197 | struct lttcomm_session_msg lsm; |
53e367f9 | 2198 | void *extended_at; |
cd80958d | 2199 | |
9d697d3d | 2200 | if (handle == NULL) { |
53e367f9 JG |
2201 | ret = -LTTNG_ERR_INVALID; |
2202 | goto end; | |
cd80958d DG |
2203 | } |
2204 | ||
53efb85a | 2205 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2206 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 2207 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2208 | sizeof(lsm.session.name)); |
9f19cc17 | 2209 | |
cac3069d | 2210 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 2211 | |
cac3069d | 2212 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2213 | if (ret < 0) { |
53e367f9 JG |
2214 | goto end; |
2215 | } | |
2216 | ||
2217 | if (ret % channel_size) { | |
2218 | ret = -LTTNG_ERR_UNK; | |
2219 | free(*channels); | |
2220 | *channels = NULL; | |
2221 | goto end; | |
9f19cc17 | 2222 | } |
53e367f9 | 2223 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2224 | |
53e367f9 JG |
2225 | /* Set extended info pointers */ |
2226 | extended_at = ((void *) *channels) + | |
2227 | channel_count * sizeof(struct lttng_channel); | |
2228 | for (i = 0; i < channel_count; i++) { | |
2229 | struct lttng_channel *chan = &(*channels)[i]; | |
2230 | ||
2231 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2232 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2233 | } |
2234 | ||
2235 | ret = (int) channel_count; | |
2236 | end: | |
2237 | return ret; | |
9f19cc17 DG |
2238 | } |
2239 | ||
2240 | /* | |
9ae110e2 JG |
2241 | * Ask the session daemon for all available events of a session channel. |
2242 | * Sets the contents of the events array. | |
2243 | * Returns the number of lttng_event entries in events; | |
2244 | * on error, returns a negative value. | |
9f19cc17 | 2245 | */ |
cd80958d DG |
2246 | int lttng_list_events(struct lttng_handle *handle, |
2247 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2248 | { |
2249 | int ret; | |
cd80958d | 2250 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
2251 | struct lttcomm_event_command_header *cmd_header = NULL; |
2252 | size_t cmd_header_len; | |
2253 | uint32_t nb_events, i; | |
de453daa | 2254 | void *comm_ext_at; |
de453daa | 2255 | char *reception_buffer = NULL; |
56f0bc67 | 2256 | struct lttng_dynamic_buffer listing; |
de453daa | 2257 | size_t storage_req; |
9f19cc17 | 2258 | |
9d697d3d DG |
2259 | /* Safety check. An handle and channel name are mandatory */ |
2260 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 2261 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
2262 | } |
2263 | ||
53efb85a | 2264 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2265 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 2266 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2267 | sizeof(lsm.session.name)); |
cac3069d | 2268 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 2269 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 2270 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 2271 | |
a04d53fc | 2272 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
2273 | (void **) &reception_buffer, (void **) &cmd_header, |
2274 | &cmd_header_len); | |
9f19cc17 | 2275 | if (ret < 0) { |
de453daa | 2276 | goto end; |
9f19cc17 DG |
2277 | } |
2278 | ||
d9f484bc JG |
2279 | if (!cmd_header) { |
2280 | ret = -LTTNG_ERR_UNK; | |
2281 | goto end; | |
2282 | } | |
2283 | ||
b4e3ceb9 PP |
2284 | /* Set number of events and free command header */ |
2285 | nb_events = cmd_header->nb_events; | |
2286 | if (nb_events > INT_MAX) { | |
2287 | ret = -EOVERFLOW; | |
de453daa | 2288 | goto end; |
b4e3ceb9 | 2289 | } |
b4e3ceb9 PP |
2290 | free(cmd_header); |
2291 | cmd_header = NULL; | |
2292 | ||
de453daa JG |
2293 | /* |
2294 | * The buffer that is returned must contain a "flat" version of | |
2295 | * the events that are returned. In other words, all pointers | |
2296 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2297 | * buffer so that the user may free everything by simply calling free() |
2298 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2299 | * compatibility. |
2300 | * | |
56f0bc67 JG |
2301 | * A first pass is performed to compute the size of the buffer that |
2302 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2303 | * the returned events so that their members always point within the |
2304 | * buffer. | |
2305 | * | |
2306 | * The layout of the returned buffer is as follows: | |
2307 | * - struct lttng_event[nb_events], | |
2308 | * - nb_events times the following: | |
2309 | * - struct lttng_event_extended, | |
2310 | * - flattened version of userspace_probe_location | |
2311 | * - filter_expression | |
2312 | * - exclusions | |
2313 | * - padding to align to 64-bits | |
2314 | */ | |
2315 | comm_ext_at = reception_buffer + | |
2316 | (nb_events * sizeof(struct lttng_event)); | |
2317 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
2318 | |
2319 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
2320 | struct lttcomm_event_extended_header *ext_comm = |
2321 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 2322 | int probe_storage_req = 0; |
b4e3ceb9 | 2323 | |
de453daa JG |
2324 | comm_ext_at += sizeof(*ext_comm); |
2325 | comm_ext_at += ext_comm->filter_len; | |
2326 | comm_ext_at += | |
2327 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2328 | ||
56f0bc67 JG |
2329 | if (ext_comm->userspace_probe_location_len) { |
2330 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2331 | struct lttng_buffer_view probe_location_view; | |
2332 | ||
2333 | probe_location_view = lttng_buffer_view_init( | |
2334 | comm_ext_at, 0, | |
2335 | ext_comm->userspace_probe_location_len); | |
2336 | ||
2337 | /* | |
2338 | * Create a temporary userspace probe location to | |
2339 | * determine the size needed by a "flattened" version | |
2340 | * of that same probe location. | |
2341 | */ | |
2342 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2343 | &probe_location_view, &probe_location); | |
2344 | if (ret < 0) { | |
2345 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2346 | goto end; | |
2347 | } | |
2348 | ||
2349 | ret = lttng_userspace_probe_location_flatten( | |
2350 | probe_location, NULL); | |
2351 | lttng_userspace_probe_location_destroy(probe_location); | |
2352 | if (ret < 0) { | |
2353 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2354 | goto end; | |
2355 | } | |
2356 | ||
2357 | probe_storage_req = ret; | |
2358 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2359 | } |
2360 | ||
de453daa | 2361 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2362 | storage_req += ext_comm->filter_len; |
2363 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2364 | /* Padding to ensure the flat probe is aligned. */ |
2365 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2366 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2367 | } |
2368 | ||
56f0bc67 JG |
2369 | lttng_dynamic_buffer_init(&listing); |
2370 | /* | |
2371 | * We must ensure that "listing" is never resized so as to preserve | |
2372 | * the validity of the flattened objects. | |
2373 | */ | |
2374 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2375 | if (ret) { | |
2376 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2377 | goto end; |
2378 | } | |
56f0bc67 JG |
2379 | |
2380 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2381 | nb_events * sizeof(struct lttng_event)); | |
2382 | if (ret) { | |
2383 | ret = -LTTNG_ERR_NOMEM; | |
2384 | goto free_dynamic_buffer; | |
2385 | } | |
de453daa JG |
2386 | |
2387 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2388 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2389 | for (i = 0; i < nb_events; i++) { |
2390 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2391 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2392 | struct lttcomm_event_extended_header *ext_comm = |
2393 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2394 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2395 | (struct lttng_event_extended *) |
2396 | (listing.data + listing.size); | |
de453daa | 2397 | |
56f0bc67 JG |
2398 | /* Insert struct lttng_event_extended. */ |
2399 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2400 | listing.size + sizeof(*event_extended)); | |
2401 | if (ret) { | |
2402 | ret = -LTTNG_ERR_NOMEM; | |
2403 | goto free_dynamic_buffer; | |
2404 | } | |
de453daa | 2405 | event->extended.ptr = event_extended; |
56f0bc67 | 2406 | |
de453daa JG |
2407 | comm_ext_at += sizeof(*ext_comm); |
2408 | ||
56f0bc67 JG |
2409 | /* Insert filter expression. */ |
2410 | if (ext_comm->filter_len) { | |
2411 | event_extended->filter_expression = listing.data + | |
2412 | listing.size; | |
2413 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2414 | ext_comm->filter_len); | |
2415 | if (ret) { | |
2416 | ret = -LTTNG_ERR_NOMEM; | |
2417 | goto free_dynamic_buffer; | |
2418 | } | |
2419 | comm_ext_at += ext_comm->filter_len; | |
2420 | } | |
2421 | ||
2422 | /* Insert exclusions. */ | |
2423 | if (ext_comm->nb_exclusions) { | |
2424 | event_extended->exclusions.count = | |
2425 | ext_comm->nb_exclusions; | |
2426 | event_extended->exclusions.strings = | |
2427 | listing.data + listing.size; | |
2428 | ||
2429 | ret = lttng_dynamic_buffer_append(&listing, | |
2430 | comm_ext_at, | |
2431 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2432 | if (ret) { | |
2433 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2434 | goto free_dynamic_buffer; |
56f0bc67 JG |
2435 | } |
2436 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2437 | } | |
2438 | ||
2439 | /* Insert padding to align to 64-bits. */ | |
2440 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2441 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2442 | if (ret) { | |
2443 | ret = -LTTNG_ERR_NOMEM; | |
2444 | goto free_dynamic_buffer; | |
2445 | } | |
2446 | ||
2447 | /* Insert flattened userspace probe location. */ | |
2448 | if (ext_comm->userspace_probe_location_len) { | |
2449 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2450 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2451 | |
56f0bc67 JG |
2452 | probe_location_view = lttng_buffer_view_init( |
2453 | comm_ext_at, 0, | |
2454 | ext_comm->userspace_probe_location_len); | |
de453daa | 2455 | |
56f0bc67 JG |
2456 | ret = lttng_userspace_probe_location_create_from_buffer( |
2457 | &probe_location_view, &probe_location); | |
2458 | if (ret < 0) { | |
2459 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2460 | goto free_dynamic_buffer; | |
2461 | } | |
2462 | ||
2463 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2464 | (listing.data + listing.size); | |
2465 | ret = lttng_userspace_probe_location_flatten( | |
2466 | probe_location, &listing); | |
2467 | lttng_userspace_probe_location_destroy(probe_location); | |
2468 | if (ret < 0) { | |
2469 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2470 | goto free_dynamic_buffer; | |
2471 | } | |
2472 | ||
2473 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2474 | } | |
de453daa JG |
2475 | } |
2476 | ||
56f0bc67 JG |
2477 | /* Don't reset listing buffer as we return its content. */ |
2478 | *events = (struct lttng_event *) listing.data; | |
2479 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2480 | ret = (int) nb_events; |
56f0bc67 JG |
2481 | free_dynamic_buffer: |
2482 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2483 | end: |
b4e3ceb9 | 2484 | free(cmd_header); |
de453daa | 2485 | free(reception_buffer); |
b4e3ceb9 | 2486 | return ret; |
9f19cc17 DG |
2487 | } |
2488 | ||
fac6795d | 2489 | /* |
1c8d13c8 TD |
2490 | * Sets the tracing_group variable with name. |
2491 | * This function allocates memory pointed to by tracing_group. | |
2492 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2493 | */ |
2494 | int lttng_set_tracing_group(const char *name) | |
2495 | { | |
9d697d3d | 2496 | if (name == NULL) { |
2f70b271 | 2497 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2498 | } |
2499 | ||
fac6795d | 2500 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2501 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2502 | } |
2503 | ||
2504 | return 0; | |
2505 | } | |
2506 | ||
cd80958d | 2507 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2508 | struct lttng_calibrate *calibrate) |
2509 | { | |
b812e5ca PP |
2510 | /* |
2511 | * This command was removed in LTTng 2.9. | |
2512 | */ | |
2513 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2514 | } |
2515 | ||
5edd7e09 DG |
2516 | /* |
2517 | * Set default channel attributes. | |
441c16a7 | 2518 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2519 | */ |
2520 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2521 | struct lttng_channel_attr *attr) | |
2522 | { | |
294851b0 | 2523 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2524 | |
5edd7e09 DG |
2525 | /* Safety check */ |
2526 | if (attr == NULL || domain == NULL) { | |
2527 | return; | |
2528 | } | |
2529 | ||
294851b0 | 2530 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2531 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2532 | ||
0a9c6494 DG |
2533 | /* Same for all domains. */ |
2534 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2535 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2536 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2537 | ||
5edd7e09 DG |
2538 | switch (domain->type) { |
2539 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2540 | attr->switch_timer_interval = |
2541 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2542 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2543 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2544 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2545 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2546 | if (extended) { |
2547 | extended->monitor_timer_interval = | |
2548 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2549 | extended->blocking_timeout = |
2550 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2551 | } |
5edd7e09 DG |
2552 | break; |
2553 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2554 | switch (domain->buf_type) { |
2555 | case LTTNG_BUFFER_PER_UID: | |
2556 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2557 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2558 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2559 | attr->switch_timer_interval = |
2560 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2561 | attr->read_timer_interval = | |
2562 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2563 | if (extended) { |
2564 | extended->monitor_timer_interval = | |
2565 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2566 | extended->blocking_timeout = |
2567 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2568 | } |
0a9c6494 DG |
2569 | break; |
2570 | case LTTNG_BUFFER_PER_PID: | |
2571 | default: | |
2572 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2573 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2574 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2575 | attr->switch_timer_interval = |
2576 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2577 | attr->read_timer_interval = | |
2578 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2579 | if (extended) { |
2580 | extended->monitor_timer_interval = | |
2581 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2582 | extended->blocking_timeout = |
2583 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2584 | } |
0a9c6494 DG |
2585 | break; |
2586 | } | |
5edd7e09 | 2587 | default: |
441c16a7 | 2588 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2589 | break; |
2590 | } | |
cf0bcb51 JG |
2591 | |
2592 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2593 | } |
2594 | ||
5ba3702f JG |
2595 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2596 | uint64_t *discarded_events) | |
2597 | { | |
2598 | int ret = 0; | |
cf0bcb51 | 2599 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2600 | |
2601 | if (!channel || !discarded_events) { | |
2602 | ret = -LTTNG_ERR_INVALID; | |
2603 | goto end; | |
2604 | } | |
2605 | ||
2606 | chan_ext = channel->attr.extended.ptr; | |
2607 | if (!chan_ext) { | |
2608 | /* | |
2609 | * This can happen since the lttng_channel structure is | |
2610 | * used for other tasks where this pointer is never set. | |
2611 | */ | |
2612 | *discarded_events = 0; | |
2613 | goto end; | |
2614 | } | |
2615 | ||
2616 | *discarded_events = chan_ext->discarded_events; | |
2617 | end: | |
2618 | return ret; | |
2619 | } | |
2620 | ||
2621 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2622 | uint64_t *lost_packets) | |
2623 | { | |
2624 | int ret = 0; | |
cf0bcb51 | 2625 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2626 | |
2627 | if (!channel || !lost_packets) { | |
2628 | ret = -LTTNG_ERR_INVALID; | |
2629 | goto end; | |
2630 | } | |
2631 | ||
2632 | chan_ext = channel->attr.extended.ptr; | |
2633 | if (!chan_ext) { | |
2634 | /* | |
2635 | * This can happen since the lttng_channel structure is | |
2636 | * used for other tasks where this pointer is never set. | |
2637 | */ | |
2638 | *lost_packets = 0; | |
2639 | goto end; | |
2640 | } | |
2641 | ||
2642 | *lost_packets = chan_ext->lost_packets; | |
2643 | end: | |
2644 | return ret; | |
2645 | } | |
2646 | ||
cf0bcb51 JG |
2647 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2648 | uint64_t *monitor_timer_interval) | |
2649 | { | |
2650 | int ret = 0; | |
2651 | ||
2652 | if (!chan || !monitor_timer_interval) { | |
2653 | ret = -LTTNG_ERR_INVALID; | |
2654 | goto end; | |
2655 | } | |
2656 | ||
2657 | if (!chan->attr.extended.ptr) { | |
2658 | ret = -LTTNG_ERR_INVALID; | |
2659 | goto end; | |
2660 | } | |
2661 | ||
2662 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2663 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2664 | end: | |
2665 | return ret; | |
2666 | } | |
2667 | ||
2668 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2669 | uint64_t monitor_timer_interval) | |
2670 | { | |
2671 | int ret = 0; | |
2672 | ||
2673 | if (!chan || !chan->attr.extended.ptr) { | |
2674 | ret = -LTTNG_ERR_INVALID; | |
2675 | goto end; | |
2676 | } | |
2677 | ||
2678 | ((struct lttng_channel_extended *) | |
2679 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2680 | monitor_timer_interval; | |
2681 | end: | |
2682 | return ret; | |
2683 | } | |
2684 | ||
491d1539 MD |
2685 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2686 | int64_t *blocking_timeout) | |
2687 | { | |
2688 | int ret = 0; | |
2689 | ||
2690 | if (!chan || !blocking_timeout) { | |
2691 | ret = -LTTNG_ERR_INVALID; | |
2692 | goto end; | |
2693 | } | |
2694 | ||
2695 | if (!chan->attr.extended.ptr) { | |
2696 | ret = -LTTNG_ERR_INVALID; | |
2697 | goto end; | |
2698 | } | |
2699 | ||
2700 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2701 | chan->attr.extended.ptr)->blocking_timeout; | |
2702 | end: | |
2703 | return ret; | |
2704 | } | |
2705 | ||
2706 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2707 | int64_t blocking_timeout) | |
2708 | { | |
2709 | int ret = 0; | |
2710 | int64_t msec_timeout; | |
2711 | ||
2712 | if (!chan || !chan->attr.extended.ptr) { | |
2713 | ret = -LTTNG_ERR_INVALID; | |
2714 | goto end; | |
2715 | } | |
2716 | ||
2717 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2718 | ret = -LTTNG_ERR_INVALID; | |
2719 | goto end; | |
2720 | } | |
2721 | ||
2722 | /* | |
2723 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2724 | * us to accept a narrower range of values (msecs expressed as a signed | |
2725 | * 32-bit integer). | |
2726 | */ | |
2727 | msec_timeout = blocking_timeout / 1000; | |
2728 | if (msec_timeout != (int32_t) msec_timeout) { | |
2729 | ret = -LTTNG_ERR_INVALID; | |
2730 | goto end; | |
2731 | } | |
2732 | ||
2733 | ((struct lttng_channel_extended *) | |
2734 | chan->attr.extended.ptr)->blocking_timeout = | |
2735 | blocking_timeout; | |
2736 | end: | |
2737 | return ret; | |
2738 | } | |
2739 | ||
fac6795d | 2740 | /* |
2269e89e | 2741 | * Check if session daemon is alive. |
fac6795d | 2742 | * |
2269e89e | 2743 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2744 | * On error returns a negative value. |
fac6795d | 2745 | */ |
947308c4 | 2746 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2747 | { |
2748 | int ret; | |
2749 | ||
2750 | ret = set_session_daemon_path(); | |
2751 | if (ret < 0) { | |
9ae110e2 | 2752 | /* Error. */ |
fac6795d DG |
2753 | return ret; |
2754 | } | |
2755 | ||
9d035200 | 2756 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2757 | /* |
9ae110e2 JG |
2758 | * No socket path set. Weird error which means the constructor |
2759 | * was not called. | |
2f70b271 DG |
2760 | */ |
2761 | assert(0); | |
fac6795d DG |
2762 | } |
2763 | ||
2269e89e | 2764 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2765 | if (ret < 0) { |
9ae110e2 | 2766 | /* Not alive. */ |
7d8234d9 MD |
2767 | return 0; |
2768 | } | |
7d8234d9 | 2769 | |
9ae110e2 | 2770 | /* Is alive. */ |
947308c4 | 2771 | return 1; |
fac6795d DG |
2772 | } |
2773 | ||
00e2e675 | 2774 | /* |
a4b92340 | 2775 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2776 | * |
2777 | * Return 0 on success, else a negative value. | |
2778 | */ | |
a4b92340 DG |
2779 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2780 | const char *control_url, const char *data_url) | |
00e2e675 | 2781 | { |
3dd05a85 | 2782 | int ret; |
a4b92340 | 2783 | ssize_t size; |
00e2e675 | 2784 | struct lttcomm_session_msg lsm; |
a4b92340 | 2785 | struct lttng_uri *uris = NULL; |
00e2e675 | 2786 | |
a4b92340 | 2787 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2788 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2789 | } |
2790 | ||
a4b92340 DG |
2791 | memset(&lsm, 0, sizeof(lsm)); |
2792 | ||
00e2e675 DG |
2793 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2794 | ||
cac3069d | 2795 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2796 | sizeof(lsm.session.name)); |
cac3069d | 2797 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2798 | |
bc894455 | 2799 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2800 | if (size < 0) { |
2f70b271 | 2801 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2802 | } |
2803 | ||
2804 | lsm.u.uri.size = size; | |
00e2e675 | 2805 | |
795a978d | 2806 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2807 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2808 | |
2809 | free(uris); | |
2810 | return ret; | |
00e2e675 DG |
2811 | } |
2812 | ||
2813 | /* | |
9c6bda17 | 2814 | * [OBSOLETE] |
00e2e675 DG |
2815 | */ |
2816 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2817 | { | |
785d2d0d | 2818 | return -ENOSYS; |
00e2e675 DG |
2819 | } |
2820 | ||
2821 | /* | |
9c6bda17 | 2822 | * [OBSOLETE] |
00e2e675 DG |
2823 | */ |
2824 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2825 | { | |
785d2d0d | 2826 | return -ENOSYS; |
00e2e675 DG |
2827 | } |
2828 | ||
07424f16 | 2829 | /* |
5feee503 | 2830 | * [OBSOLETE] |
07424f16 DG |
2831 | */ |
2832 | int _lttng_create_session_ext(const char *name, const char *url, | |
2833 | const char *datetime) | |
2834 | { | |
5feee503 | 2835 | return -ENOSYS; |
07424f16 DG |
2836 | } |
2837 | ||
806e2684 DG |
2838 | /* |
2839 | * For a given session name, this call checks if the data is ready to be read | |
2840 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2841 | * any readers. | |
2842 | */ | |
6d805429 | 2843 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2844 | { |
2845 | int ret; | |
2846 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2847 | uint8_t *pending = NULL; |
806e2684 DG |
2848 | |
2849 | if (session_name == NULL) { | |
2850 | return -LTTNG_ERR_INVALID; | |
2851 | } | |
2852 | ||
53efb85a | 2853 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2854 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2855 | |
cac3069d DG |
2856 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2857 | sizeof(lsm.session.name)); | |
806e2684 | 2858 | |
f6151c55 JG |
2859 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2860 | if (ret < 0) { | |
2861 | goto end; | |
2862 | } else if (ret != 1) { | |
2863 | /* Unexpected payload size */ | |
2864 | ret = -LTTNG_ERR_INVALID; | |
2865 | goto end; | |
806e2684 DG |
2866 | } |
2867 | ||
f6151c55 JG |
2868 | ret = (int) *pending; |
2869 | end: | |
2870 | free(pending); | |
806e2684 DG |
2871 | return ret; |
2872 | } | |
2873 | ||
a5dfbb9d MD |
2874 | /* |
2875 | * List PIDs in the tracker. | |
2876 | * | |
1b18ce93 JG |
2877 | * enabled is set to whether the PID tracker is enabled. |
2878 | * pids is set to an allocated array of PIDs currently tracked. On | |
2879 | * success, pids must be freed by the caller. | |
2880 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2881 | * |
2882 | * Returns 0 on success, else a negative LTTng error code. | |
2883 | */ | |
2884 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2885 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2886 | { | |
ebbf5ab7 JR |
2887 | int ret; |
2888 | int enabled = 1; | |
a5dfbb9d MD |
2889 | struct lttcomm_session_msg lsm; |
2890 | size_t nr_pids; | |
ff75c11e | 2891 | int32_t *pids = NULL; |
a5dfbb9d MD |
2892 | |
2893 | if (handle == NULL) { | |
2894 | return -LTTNG_ERR_INVALID; | |
2895 | } | |
2896 | ||
2897 | memset(&lsm, 0, sizeof(lsm)); | |
2898 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2899 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2900 | sizeof(lsm.session.name)); | |
2901 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2902 | ||
2903 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2904 | if (ret < 0) { | |
2905 | return ret; | |
2906 | } | |
2907 | nr_pids = ret / sizeof(int32_t); | |
de8218d4 JG |
2908 | if (nr_pids > 0 && !pids) { |
2909 | return -LTTNG_ERR_UNK; | |
2910 | } | |
a5dfbb9d MD |
2911 | if (nr_pids == 1 && pids[0] == -1) { |
2912 | free(pids); | |
2913 | pids = NULL; | |
2914 | enabled = 0; | |
2915 | nr_pids = 0; | |
2916 | } | |
2917 | *_enabled = enabled; | |
2918 | *_pids = pids; | |
2919 | *_nr_pids = nr_pids; | |
2920 | return 0; | |
2921 | } | |
2922 | ||
93ec662e JD |
2923 | /* |
2924 | * Regenerate the metadata for a session. | |
2925 | * Return 0 on success, a negative error code on error. | |
2926 | */ | |
eded6438 | 2927 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2928 | { |
2929 | int ret; | |
2930 | struct lttcomm_session_msg lsm; | |
2931 | ||
2932 | if (!session_name) { | |
2933 | ret = -LTTNG_ERR_INVALID; | |
2934 | goto end; | |
2935 | } | |
2936 | ||
2937 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2938 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2939 | |
2940 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2941 | sizeof(lsm.session.name)); | |
2942 | ||
2943 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2944 | if (ret < 0) { | |
2945 | goto end; | |
2946 | } | |
2947 | ||
2948 | ret = 0; | |
2949 | end: | |
2950 | return ret; | |
2951 | } | |
2952 | ||
eded6438 JD |
2953 | /* |
2954 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2955 | */ | |
2956 | int lttng_metadata_regenerate(const char *session_name) | |
2957 | { | |
2958 | return lttng_regenerate_metadata(session_name); | |
2959 | } | |
2960 | ||
c2561365 JD |
2961 | /* |
2962 | * Regenerate the statedump of a session. | |
2963 | * Return 0 on success, a negative error code on error. | |
2964 | */ | |
2965 | int lttng_regenerate_statedump(const char *session_name) | |
2966 | { | |
2967 | int ret; | |
2968 | struct lttcomm_session_msg lsm; | |
2969 | ||
2970 | if (!session_name) { | |
2971 | ret = -LTTNG_ERR_INVALID; | |
2972 | goto end; | |
2973 | } | |
2974 | ||
2975 | memset(&lsm, 0, sizeof(lsm)); | |
2976 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2977 | ||
2978 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2979 | sizeof(lsm.session.name)); | |
2980 | ||
2981 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2982 | if (ret < 0) { | |
2983 | goto end; | |
2984 | } | |
2985 | ||
2986 | ret = 0; | |
2987 | end: | |
2988 | return ret; | |
2989 | } | |
2990 | ||
a58c490f JG |
2991 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2992 | { | |
2993 | int ret; | |
2994 | struct lttcomm_session_msg lsm; | |
3647288f | 2995 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2996 | |
3647288f | 2997 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2998 | if (!trigger) { |
2999 | ret = -LTTNG_ERR_INVALID; | |
3000 | goto end; | |
3001 | } | |
3002 | ||
3003 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 3004 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3005 | goto end; |
3006 | } | |
3007 | ||
3647288f JG |
3008 | ret = lttng_trigger_serialize(trigger, &buffer); |
3009 | if (ret < 0) { | |
a58c490f JG |
3010 | ret = -LTTNG_ERR_UNK; |
3011 | goto end; | |
3012 | } | |
3013 | ||
a58c490f JG |
3014 | memset(&lsm, 0, sizeof(lsm)); |
3015 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
3016 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3017 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3018 | buffer.size, NULL); | |
a58c490f | 3019 | end: |
3647288f | 3020 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3021 | return ret; |
3022 | } | |
3023 | ||
3024 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
3025 | { | |
3026 | int ret; | |
3027 | struct lttcomm_session_msg lsm; | |
3647288f | 3028 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3029 | |
3647288f | 3030 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3031 | if (!trigger) { |
3032 | ret = -LTTNG_ERR_INVALID; | |
3033 | goto end; | |
3034 | } | |
3035 | ||
3036 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 3037 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3038 | goto end; |
3039 | } | |
3040 | ||
3647288f JG |
3041 | ret = lttng_trigger_serialize(trigger, &buffer); |
3042 | if (ret < 0) { | |
a58c490f JG |
3043 | ret = -LTTNG_ERR_UNK; |
3044 | goto end; | |
3045 | } | |
3046 | ||
a58c490f JG |
3047 | memset(&lsm, 0, sizeof(lsm)); |
3048 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
3049 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3050 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3051 | buffer.size, NULL); | |
a58c490f | 3052 | end: |
3647288f | 3053 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3054 | return ret; |
3055 | } | |
3056 | ||
fac6795d | 3057 | /* |
9ae110e2 | 3058 | * lib constructor. |
fac6795d | 3059 | */ |
b2b89e8a | 3060 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3061 | { |
3062 | /* Set default session group */ | |
bbccc3d2 | 3063 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3064 | } |
49cca668 DG |
3065 | |
3066 | /* | |
9ae110e2 | 3067 | * lib destructor. |
49cca668 | 3068 | */ |
b2b89e8a | 3069 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3070 | { |
3071 | free(tracing_group); | |
3072 | } |