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> | |
823a1989 | 48 | #include <lttng/destruction-handle.h> |
fac6795d | 49 | |
d00c599e DG |
50 | #include "filter/filter-ast.h" |
51 | #include "filter/filter-parser.h" | |
52 | #include "filter/filter-bytecode.h" | |
53 | #include "filter/memstream.h" | |
cac3069d | 54 | #include "lttng-ctl-helper.h" |
53a80697 MD |
55 | |
56 | #ifdef DEBUG | |
d00c599e | 57 | static const int print_xml = 1; |
53a80697 MD |
58 | #define dbg_printf(fmt, args...) \ |
59 | printf("[debug liblttng-ctl] " fmt, ## args) | |
60 | #else | |
d00c599e | 61 | static const int print_xml = 0; |
53a80697 MD |
62 | #define dbg_printf(fmt, args...) \ |
63 | do { \ | |
64 | /* do nothing but check printf format */ \ | |
65 | if (0) \ | |
66 | printf("[debug liblttnctl] " fmt, ## args); \ | |
67 | } while (0) | |
68 | #endif | |
69 | ||
70 | ||
fac6795d | 71 | /* Socket to session daemon for communication */ |
823a1989 | 72 | static int sessiond_socket = -1; |
fac6795d DG |
73 | static char sessiond_sock_path[PATH_MAX]; |
74 | ||
fac6795d DG |
75 | /* Variables */ |
76 | static char *tracing_group; | |
77 | static int connected; | |
78 | ||
97e19046 DG |
79 | /* Global */ |
80 | ||
81 | /* | |
82 | * Those two variables are used by error.h to silent or control the verbosity of | |
83 | * error message. They are global to the library so application linking with it | |
84 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
85 | */ |
86 | int lttng_opt_quiet; | |
87 | int lttng_opt_verbose; | |
c7e35b03 | 88 | int lttng_opt_mi; |
97e19046 | 89 | |
99497cd0 MD |
90 | /* |
91 | * Copy string from src to dst and enforce null terminated byte. | |
92 | */ | |
cac3069d DG |
93 | LTTNG_HIDDEN |
94 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 95 | { |
e7d6716d | 96 | if (src && dst) { |
99497cd0 MD |
97 | strncpy(dst, src, len); |
98 | /* Enforce the NULL terminated byte */ | |
99 | dst[len - 1] = '\0'; | |
cd80958d DG |
100 | } else if (dst) { |
101 | dst[0] = '\0'; | |
99497cd0 MD |
102 | } |
103 | } | |
104 | ||
fac6795d | 105 | /* |
cd80958d | 106 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 107 | * |
cd80958d DG |
108 | * If domain is unknown, default domain will be the kernel. |
109 | */ | |
cac3069d DG |
110 | LTTNG_HIDDEN |
111 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
112 | struct lttng_domain *src) | |
cd80958d DG |
113 | { |
114 | if (src && dst) { | |
115 | switch (src->type) { | |
00e2e675 DG |
116 | case LTTNG_DOMAIN_KERNEL: |
117 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 118 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 119 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 120 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
121 | memcpy(dst, src, sizeof(struct lttng_domain)); |
122 | break; | |
123 | default: | |
124 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 125 | break; |
cd80958d DG |
126 | } |
127 | } | |
128 | } | |
129 | ||
130 | /* | |
131 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 132 | * |
1c8d13c8 TD |
133 | * On success, returns the number of bytes sent (>=0) |
134 | * On error, returns -1 | |
fac6795d | 135 | */ |
cd80958d | 136 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
137 | { |
138 | int ret; | |
139 | ||
140 | if (!connected) { | |
2f70b271 | 141 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 142 | goto end; |
fac6795d DG |
143 | } |
144 | ||
a4b92340 DG |
145 | DBG("LSM cmd type : %d", lsm->cmd_type); |
146 | ||
be040666 | 147 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 148 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
149 | if (ret < 0) { |
150 | ret = -LTTNG_ERR_FATAL; | |
151 | } | |
e065084a DG |
152 | |
153 | end: | |
154 | return ret; | |
155 | } | |
156 | ||
53a80697 MD |
157 | /* |
158 | * Send var len data to the session daemon. | |
159 | * | |
160 | * On success, returns the number of bytes sent (>=0) | |
161 | * On error, returns -1 | |
162 | */ | |
c2d69327 | 163 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
164 | { |
165 | int ret; | |
166 | ||
167 | if (!connected) { | |
2f70b271 | 168 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
169 | goto end; |
170 | } | |
a4b92340 | 171 | |
53a80697 MD |
172 | if (!data || !len) { |
173 | ret = 0; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
178 | if (ret < 0) { |
179 | ret = -LTTNG_ERR_FATAL; | |
180 | } | |
53a80697 MD |
181 | |
182 | end: | |
183 | return ret; | |
184 | } | |
185 | ||
a04d53fc FD |
186 | /* |
187 | * Send file descriptors to the session daemon. | |
188 | * | |
189 | * On success, returns the number of bytes sent (>=0) | |
190 | * On error, returns -1 | |
191 | */ | |
192 | static int send_session_fds(const int *fds, size_t nb_fd) | |
193 | { | |
194 | int ret; | |
195 | ||
196 | if (!connected) { | |
197 | ret = -LTTNG_ERR_NO_SESSIOND; | |
198 | goto end; | |
199 | } | |
200 | ||
201 | if (!fds || !nb_fd) { | |
202 | ret = 0; | |
203 | goto end; | |
204 | } | |
205 | ||
206 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
207 | if (ret < 0) { | |
208 | ret = -LTTNG_ERR_FATAL; | |
209 | } | |
210 | ||
211 | end: | |
212 | return ret; | |
213 | } | |
214 | ||
e065084a | 215 | /* |
cd80958d | 216 | * Receive data from the sessiond socket. |
e065084a | 217 | * |
1c8d13c8 TD |
218 | * On success, returns the number of bytes received (>=0) |
219 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 220 | */ |
ca95a216 | 221 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
222 | { |
223 | int ret; | |
224 | ||
225 | if (!connected) { | |
2f70b271 | 226 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 227 | goto end; |
fac6795d DG |
228 | } |
229 | ||
ca95a216 | 230 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
231 | if (ret < 0) { |
232 | ret = -LTTNG_ERR_FATAL; | |
233 | } | |
fac6795d | 234 | |
e065084a | 235 | end: |
fac6795d DG |
236 | return ret; |
237 | } | |
238 | ||
239 | /* | |
9ae110e2 | 240 | * Check if we are in the specified group. |
65beb5ff | 241 | * |
9ae110e2 | 242 | * If yes return 1, else return -1. |
947308c4 | 243 | */ |
6c71277b MD |
244 | LTTNG_HIDDEN |
245 | int lttng_check_tracing_group(void) | |
947308c4 | 246 | { |
6710e5aa | 247 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
248 | int grp_list_size, grp_id, i; |
249 | int ret = -1; | |
6c71277b | 250 | const char *grp_name = tracing_group; |
947308c4 DG |
251 | |
252 | /* Get GID of group 'tracing' */ | |
6710e5aa | 253 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 254 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
255 | goto end; |
256 | } | |
257 | ||
258 | /* Get number of supplementary group IDs */ | |
259 | grp_list_size = getgroups(0, NULL); | |
260 | if (grp_list_size < 0) { | |
6f04ed72 | 261 | PERROR("getgroups"); |
947308c4 DG |
262 | goto end; |
263 | } | |
264 | ||
265 | /* Alloc group list of the right size */ | |
3f451dc0 | 266 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 267 | if (!grp_list) { |
6f04ed72 | 268 | PERROR("malloc"); |
00795392 MD |
269 | goto end; |
270 | } | |
947308c4 | 271 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 272 | if (grp_id < 0) { |
6f04ed72 | 273 | PERROR("getgroups"); |
947308c4 DG |
274 | goto free_list; |
275 | } | |
276 | ||
277 | for (i = 0; i < grp_list_size; i++) { | |
6710e5aa | 278 | if (grp_list[i] == tracing_gid) { |
2269e89e | 279 | ret = 1; |
947308c4 DG |
280 | break; |
281 | } | |
282 | } | |
283 | ||
284 | free_list: | |
285 | free(grp_list); | |
286 | ||
287 | end: | |
288 | return ret; | |
289 | } | |
290 | ||
e3091d6a FD |
291 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
292 | { | |
293 | int ret; | |
294 | long num_cpu; | |
295 | size_t best_mem_info; | |
296 | size_t num_bytes_requested_total; | |
297 | ||
298 | /* | |
299 | * Get the number of CPU currently online to compute the amount of | |
300 | * memory needed to create a buffer for every CPU. | |
301 | */ | |
302 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
303 | if (num_cpu == -1) { | |
304 | goto error; | |
305 | } | |
306 | ||
307 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
308 | ||
309 | /* | |
310 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
311 | * reliable estimate we can get but it is only exposed by the kernel | |
312 | * since 3.14. (See Linux kernel commit: | |
313 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
314 | */ | |
315 | ret = utils_get_memory_available(&best_mem_info); | |
316 | if (ret >= 0) { | |
317 | goto success; | |
318 | } | |
319 | ||
320 | /* | |
321 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
322 | * is a sanity check for obvious user error. | |
323 | */ | |
324 | ret = utils_get_memory_total(&best_mem_info); | |
325 | if (ret >= 0) { | |
326 | goto success; | |
327 | } | |
328 | ||
329 | error: | |
330 | return -1; | |
331 | success: | |
332 | return best_mem_info >= num_bytes_requested_total; | |
333 | } | |
334 | ||
947308c4 | 335 | /* |
2269e89e DG |
336 | * Try connect to session daemon with sock_path. |
337 | * | |
338 | * Return 0 on success, else -1 | |
339 | */ | |
340 | static int try_connect_sessiond(const char *sock_path) | |
341 | { | |
342 | int ret; | |
343 | ||
344 | /* If socket exist, we check if the daemon listens for connect. */ | |
345 | ret = access(sock_path, F_OK); | |
346 | if (ret < 0) { | |
347 | /* Not alive */ | |
2f70b271 | 348 | goto error; |
2269e89e DG |
349 | } |
350 | ||
351 | ret = lttcomm_connect_unix_sock(sock_path); | |
352 | if (ret < 0) { | |
9ae110e2 | 353 | /* Not alive. */ |
2f70b271 | 354 | goto error; |
2269e89e DG |
355 | } |
356 | ||
357 | ret = lttcomm_close_unix_sock(ret); | |
358 | if (ret < 0) { | |
6f04ed72 | 359 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
360 | } |
361 | ||
362 | return 0; | |
2f70b271 DG |
363 | |
364 | error: | |
365 | return -1; | |
2269e89e DG |
366 | } |
367 | ||
368 | /* | |
2f70b271 DG |
369 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
370 | * variable. | |
371 | * | |
372 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
373 | * is somehow too long or ENOMEM). | |
947308c4 DG |
374 | */ |
375 | static int set_session_daemon_path(void) | |
376 | { | |
9ae110e2 | 377 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
378 | uid_t uid; |
379 | ||
380 | uid = getuid(); | |
947308c4 | 381 | |
2269e89e DG |
382 | if (uid != 0) { |
383 | /* Are we in the tracing group ? */ | |
6c71277b | 384 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
385 | } |
386 | ||
08a9c49f | 387 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
388 | lttng_ctl_copy_string(sessiond_sock_path, |
389 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 390 | } |
2269e89e | 391 | |
08a9c49f | 392 | if (uid != 0) { |
c617c0c6 MD |
393 | int ret; |
394 | ||
08a9c49f | 395 | if (in_tgroup) { |
9ae110e2 | 396 | /* Tracing group. */ |
08a9c49f TD |
397 | ret = try_connect_sessiond(sessiond_sock_path); |
398 | if (ret >= 0) { | |
399 | goto end; | |
2269e89e | 400 | } |
08a9c49f | 401 | /* Global session daemon not available... */ |
2269e89e | 402 | } |
08a9c49f TD |
403 | /* ...or not in tracing group (and not root), default */ |
404 | ||
405 | /* | |
9ae110e2 JG |
406 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
407 | * is too small; | |
408 | * With GNU C >= 2.1, snprintf returns the required size | |
409 | * (excluding closing null) | |
08a9c49f TD |
410 | */ |
411 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 412 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 413 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 414 | goto error; |
947308c4 | 415 | } |
947308c4 | 416 | } |
08a9c49f | 417 | end: |
947308c4 | 418 | return 0; |
2f70b271 DG |
419 | |
420 | error: | |
421 | return -1; | |
947308c4 DG |
422 | } |
423 | ||
65beb5ff | 424 | /* |
9ae110e2 | 425 | * Connect to the LTTng session daemon. |
65beb5ff | 426 | * |
823a1989 | 427 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 428 | */ |
823a1989 | 429 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
430 | { |
431 | int ret; | |
432 | ||
433 | ret = set_session_daemon_path(); | |
434 | if (ret < 0) { | |
2f70b271 | 435 | goto error; |
65beb5ff DG |
436 | } |
437 | ||
9ae110e2 | 438 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
439 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
440 | if (ret < 0) { | |
2f70b271 | 441 | goto error; |
65beb5ff DG |
442 | } |
443 | ||
823a1989 | 444 | return ret; |
2f70b271 DG |
445 | |
446 | error: | |
447 | return -1; | |
65beb5ff DG |
448 | } |
449 | ||
823a1989 JG |
450 | static void reset_global_sessiond_connection_state(void) |
451 | { | |
452 | sessiond_socket = -1; | |
453 | connected = 0; | |
454 | } | |
455 | ||
65beb5ff | 456 | /* |
1c8d13c8 | 457 | * Clean disconnect from the session daemon. |
9ae110e2 | 458 | * |
1c8d13c8 | 459 | * On success, return 0. On error, return -1. |
65beb5ff DG |
460 | */ |
461 | static int disconnect_sessiond(void) | |
462 | { | |
463 | int ret = 0; | |
464 | ||
465 | if (connected) { | |
466 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
823a1989 | 467 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
468 | } |
469 | ||
470 | return ret; | |
471 | } | |
472 | ||
795a978d PP |
473 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
474 | size_t *user_len) | |
475 | { | |
476 | int ret = 0; | |
477 | void *buf = NULL; | |
478 | ||
479 | if (len) { | |
480 | if (!user_len) { | |
481 | ret = -LTTNG_ERR_INVALID; | |
482 | goto end; | |
483 | } | |
484 | ||
485 | buf = zmalloc(len); | |
486 | if (!buf) { | |
487 | ret = -ENOMEM; | |
488 | goto end; | |
489 | } | |
490 | ||
491 | ret = recv_data_sessiond(buf, len); | |
492 | if (ret < 0) { | |
493 | goto end; | |
494 | } | |
495 | ||
496 | if (!user_buf) { | |
497 | ret = -LTTNG_ERR_INVALID; | |
498 | goto end; | |
499 | } | |
500 | ||
501 | /* Move ownership of command header buffer to user. */ | |
502 | *user_buf = buf; | |
503 | buf = NULL; | |
504 | *user_len = len; | |
505 | } else { | |
506 | /* No command header. */ | |
507 | if (user_len) { | |
508 | *user_len = 0; | |
509 | } | |
510 | ||
511 | if (user_buf) { | |
512 | *user_buf = NULL; | |
513 | } | |
514 | } | |
515 | ||
516 | end: | |
517 | free(buf); | |
518 | return ret; | |
519 | } | |
520 | ||
35a6fdb7 | 521 | /* |
cd80958d | 522 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
523 | * Takes extra var. len. data and file descriptors as input to send to the |
524 | * session daemon. | |
65beb5ff | 525 | * |
af87c45a | 526 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 527 | */ |
cac3069d | 528 | LTTNG_HIDDEN |
a04d53fc FD |
529 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
530 | const int *fds, size_t nb_fd, const void *vardata, | |
531 | size_t vardata_len, void **user_payload_buf, | |
532 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
533 | { |
534 | int ret; | |
795a978d | 535 | size_t payload_len; |
cd80958d | 536 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
537 | |
538 | ret = connect_sessiond(); | |
539 | if (ret < 0) { | |
2f70b271 | 540 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 541 | goto end; |
823a1989 JG |
542 | } else { |
543 | sessiond_socket = ret; | |
544 | connected = 1; | |
65beb5ff DG |
545 | } |
546 | ||
65beb5ff | 547 | /* Send command to session daemon */ |
cd80958d | 548 | ret = send_session_msg(lsm); |
65beb5ff | 549 | if (ret < 0) { |
2f70b271 | 550 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
551 | goto end; |
552 | } | |
53a80697 | 553 | /* Send var len data */ |
795a978d | 554 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 555 | if (ret < 0) { |
2f70b271 | 556 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
557 | goto end; |
558 | } | |
65beb5ff | 559 | |
a04d53fc FD |
560 | /* Send fds */ |
561 | ret = send_session_fds(fds, nb_fd); | |
562 | if (ret < 0) { | |
563 | /* Ret value is a valid lttng error code. */ | |
564 | goto end; | |
565 | } | |
566 | ||
65beb5ff DG |
567 | /* Get header from data transmission */ |
568 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
569 | if (ret < 0) { | |
2f70b271 | 570 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
571 | goto end; |
572 | } | |
573 | ||
574 | /* Check error code if OK */ | |
f73fabfd | 575 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
576 | ret = -llm.ret_code; |
577 | goto end; | |
578 | } | |
579 | ||
795a978d PP |
580 | /* Get command header from data transmission */ |
581 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
582 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 583 | if (ret < 0) { |
65beb5ff DG |
584 | goto end; |
585 | } | |
586 | ||
795a978d PP |
587 | /* Get payload from data transmission */ |
588 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
589 | &payload_len); | |
590 | if (ret < 0) { | |
83009e5e DG |
591 | goto end; |
592 | } | |
593 | ||
795a978d | 594 | ret = llm.data_size; |
65beb5ff DG |
595 | |
596 | end: | |
597 | disconnect_sessiond(); | |
598 | return ret; | |
599 | } | |
600 | ||
9f19cc17 | 601 | /* |
cd80958d | 602 | * Create lttng handle and return pointer. |
9ae110e2 | 603 | * |
1c8d13c8 | 604 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 605 | */ |
cd80958d DG |
606 | struct lttng_handle *lttng_create_handle(const char *session_name, |
607 | struct lttng_domain *domain) | |
9f19cc17 | 608 | { |
2f70b271 DG |
609 | struct lttng_handle *handle = NULL; |
610 | ||
3f451dc0 | 611 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 612 | if (handle == NULL) { |
2f70b271 | 613 | PERROR("malloc handle"); |
cd80958d DG |
614 | goto end; |
615 | } | |
616 | ||
617 | /* Copy session name */ | |
cac3069d | 618 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
619 | sizeof(handle->session_name)); |
620 | ||
95681498 JG |
621 | /* Copy lttng domain or leave initialized to 0. */ |
622 | if (domain) { | |
623 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
624 | } | |
cd80958d DG |
625 | |
626 | end: | |
627 | return handle; | |
628 | } | |
629 | ||
630 | /* | |
631 | * Destroy handle by free(3) the pointer. | |
632 | */ | |
633 | void lttng_destroy_handle(struct lttng_handle *handle) | |
634 | { | |
0e428499 | 635 | free(handle); |
eb354453 DG |
636 | } |
637 | ||
d9800920 DG |
638 | /* |
639 | * Register an outside consumer. | |
9ae110e2 | 640 | * |
1c8d13c8 | 641 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
642 | */ |
643 | int lttng_register_consumer(struct lttng_handle *handle, | |
644 | const char *socket_path) | |
645 | { | |
646 | struct lttcomm_session_msg lsm; | |
647 | ||
2f70b271 DG |
648 | if (handle == NULL || socket_path == NULL) { |
649 | return -LTTNG_ERR_INVALID; | |
650 | } | |
651 | ||
53efb85a | 652 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 653 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 654 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 655 | sizeof(lsm.session.name)); |
cac3069d | 656 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
d9800920 | 657 | |
9ae110e2 JG |
658 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
659 | sizeof(lsm.u.reg.path)); | |
d9800920 | 660 | |
cac3069d | 661 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
662 | } |
663 | ||
1df4dedd | 664 | /* |
9ae110e2 JG |
665 | * Start tracing for all traces of the session. |
666 | * | |
667 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 668 | */ |
6a4f824d | 669 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 670 | { |
cd80958d DG |
671 | struct lttcomm_session_msg lsm; |
672 | ||
6a4f824d | 673 | if (session_name == NULL) { |
2f70b271 | 674 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
675 | } |
676 | ||
53efb85a | 677 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 678 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 679 | |
cac3069d DG |
680 | lttng_ctl_copy_string(lsm.session.name, session_name, |
681 | sizeof(lsm.session.name)); | |
cd80958d | 682 | |
cac3069d | 683 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 684 | } |
1df4dedd DG |
685 | |
686 | /* | |
38ee087f | 687 | * Stop tracing for all traces of the session. |
f3ed775e | 688 | */ |
38ee087f | 689 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 690 | { |
38ee087f | 691 | int ret, data_ret; |
cd80958d DG |
692 | struct lttcomm_session_msg lsm; |
693 | ||
6a4f824d | 694 | if (session_name == NULL) { |
2f70b271 | 695 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
696 | } |
697 | ||
53efb85a | 698 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 699 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 700 | |
cac3069d DG |
701 | lttng_ctl_copy_string(lsm.session.name, session_name, |
702 | sizeof(lsm.session.name)); | |
cd80958d | 703 | |
cac3069d | 704 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
705 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
706 | goto error; | |
707 | } | |
708 | ||
709 | if (!wait) { | |
710 | goto end; | |
711 | } | |
712 | ||
38ee087f DG |
713 | /* Check for data availability */ |
714 | do { | |
6d805429 | 715 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
716 | if (data_ret < 0) { |
717 | /* Return the data available call error. */ | |
718 | ret = data_ret; | |
719 | goto error; | |
720 | } | |
721 | ||
722 | /* | |
9ae110e2 JG |
723 | * Data sleep time before retrying (in usec). Don't sleep if the |
724 | * call returned value indicates availability. | |
38ee087f | 725 | */ |
6d805429 | 726 | if (data_ret) { |
38ee087f | 727 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
38ee087f | 728 | } |
6d805429 | 729 | } while (data_ret != 0); |
38ee087f | 730 | |
38ee087f DG |
731 | end: |
732 | error: | |
733 | return ret; | |
734 | } | |
735 | ||
736 | /* | |
737 | * Stop tracing and wait for data availability. | |
738 | */ | |
739 | int lttng_stop_tracing(const char *session_name) | |
740 | { | |
741 | return _lttng_stop_tracing(session_name, 1); | |
742 | } | |
743 | ||
744 | /* | |
745 | * Stop tracing but _don't_ wait for data availability. | |
746 | */ | |
747 | int lttng_stop_tracing_no_wait(const char *session_name) | |
748 | { | |
749 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
750 | } |
751 | ||
752 | /* | |
601d5acf DG |
753 | * Add context to a channel. |
754 | * | |
755 | * If the given channel is NULL, add the contexts to all channels. | |
756 | * The event_name param is ignored. | |
af87c45a DG |
757 | * |
758 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 759 | */ |
cd80958d | 760 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
761 | struct lttng_event_context *ctx, const char *event_name, |
762 | const char *channel_name) | |
d65106b1 | 763 | { |
2001793c JG |
764 | int ret; |
765 | size_t len = 0; | |
766 | char *buf = NULL; | |
cd80958d DG |
767 | struct lttcomm_session_msg lsm; |
768 | ||
9ae110e2 | 769 | /* Safety check. Both are mandatory. */ |
9d697d3d | 770 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
771 | ret = -LTTNG_ERR_INVALID; |
772 | goto end; | |
cd80958d DG |
773 | } |
774 | ||
441c16a7 | 775 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
776 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
777 | ||
85076754 MD |
778 | /* If no channel name, send empty string. */ |
779 | if (channel_name == NULL) { | |
780 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
781 | sizeof(lsm.u.context.channel_name)); | |
782 | } else { | |
783 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
784 | sizeof(lsm.u.context.channel_name)); | |
785 | } | |
cd80958d | 786 | |
cac3069d | 787 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cac3069d | 788 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
789 | sizeof(lsm.session.name)); |
790 | ||
2001793c JG |
791 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
792 | size_t provider_len, ctx_len; | |
793 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
794 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
795 | ||
796 | if (!provider_name || !ctx_name) { | |
797 | ret = -LTTNG_ERR_INVALID; | |
798 | goto end; | |
799 | } | |
800 | ||
801 | provider_len = strlen(provider_name); | |
802 | if (provider_len == 0) { | |
803 | ret = -LTTNG_ERR_INVALID; | |
804 | goto end; | |
805 | } | |
806 | lsm.u.context.provider_name_len = provider_len; | |
807 | ||
808 | ctx_len = strlen(ctx_name); | |
809 | if (ctx_len == 0) { | |
810 | ret = -LTTNG_ERR_INVALID; | |
811 | goto end; | |
812 | } | |
813 | lsm.u.context.context_name_len = ctx_len; | |
814 | ||
815 | len = provider_len + ctx_len; | |
816 | buf = zmalloc(len); | |
817 | if (!buf) { | |
818 | ret = -LTTNG_ERR_NOMEM; | |
819 | goto end; | |
820 | } | |
821 | ||
822 | memcpy(buf, provider_name, provider_len); | |
823 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
824 | } | |
825 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
826 | |
827 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
828 | /* | |
829 | * Don't leak application addresses to the sessiond. | |
830 | * This is only necessary when ctx is for an app ctx otherwise | |
831 | * the values inside the union (type & config) are overwritten. | |
832 | */ | |
833 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
834 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
835 | } | |
2001793c | 836 | |
795a978d | 837 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
838 | end: |
839 | free(buf); | |
840 | return ret; | |
d65106b1 DG |
841 | } |
842 | ||
f3ed775e | 843 | /* |
9ae110e2 JG |
844 | * Enable event(s) for a channel. |
845 | * | |
846 | * If no event name is specified, all events are enabled. | |
847 | * If no channel name is specified, the default 'channel0' is used. | |
848 | * | |
849 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 850 | */ |
cd80958d | 851 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 852 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 853 | { |
f8a96544 JI |
854 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
855 | NULL, 0, NULL); | |
1df4dedd DG |
856 | } |
857 | ||
53a80697 | 858 | /* |
025faf73 | 859 | * Create or enable an event with a filter expression. |
178191b3 | 860 | * |
53a80697 MD |
861 | * Return negative error value on error. |
862 | * Return size of returned session payload data if OK. | |
863 | */ | |
025faf73 | 864 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 865 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
866 | const char *filter_expression) |
867 | { | |
f8a96544 JI |
868 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
869 | filter_expression, 0, NULL); | |
53a80697 MD |
870 | } |
871 | ||
347c5ab5 | 872 | /* |
0e115563 | 873 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
874 | * NULL if not applicable. |
875 | * | |
876 | * An event with NO loglevel and the name is * will return NULL. | |
877 | */ | |
0e115563 | 878 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
879 | { |
880 | int err; | |
0e115563 | 881 | char *agent_filter = NULL; |
347c5ab5 DG |
882 | |
883 | assert(ev); | |
884 | ||
885 | /* Don't add filter for the '*' event. */ | |
9f449915 | 886 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 887 | if (filter) { |
0e115563 | 888 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
889 | ev->name); |
890 | } else { | |
0e115563 | 891 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
892 | } |
893 | if (err < 0) { | |
894 | PERROR("asprintf"); | |
6a556f7b | 895 | goto error; |
347c5ab5 DG |
896 | } |
897 | } | |
898 | ||
899 | /* Add loglevel filtering if any for the JUL domain. */ | |
900 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
901 | char *op; | |
902 | ||
903 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
904 | op = ">="; | |
905 | } else { | |
906 | op = "=="; | |
907 | } | |
908 | ||
0e115563 | 909 | if (filter || agent_filter) { |
6a556f7b JG |
910 | char *new_filter; |
911 | ||
fb0edb23 | 912 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 913 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 914 | ev->loglevel); |
0e115563 DG |
915 | if (agent_filter) { |
916 | free(agent_filter); | |
6a556f7b | 917 | } |
0e115563 | 918 | agent_filter = new_filter; |
347c5ab5 | 919 | } else { |
0e115563 | 920 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
921 | ev->loglevel); |
922 | } | |
923 | if (err < 0) { | |
924 | PERROR("asprintf"); | |
6a556f7b | 925 | goto error; |
347c5ab5 DG |
926 | } |
927 | } | |
928 | ||
0e115563 | 929 | return agent_filter; |
6a556f7b | 930 | error: |
0e115563 | 931 | free(agent_filter); |
6a556f7b | 932 | return NULL; |
347c5ab5 DG |
933 | } |
934 | ||
137b9942 | 935 | /* |
ec166985 | 936 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
937 | * newly allocated parser context in ctxp and populate the lsm object with the |
938 | * expression len. | |
939 | * | |
940 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
941 | */ | |
942 | static int generate_filter(char *filter_expression, | |
943 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
944 | { | |
945 | int ret; | |
946 | struct filter_parser_ctx *ctx = NULL; | |
947 | FILE *fmem = NULL; | |
948 | ||
949 | assert(filter_expression); | |
950 | assert(lsm); | |
951 | assert(ctxp); | |
952 | ||
953 | /* | |
954 | * Casting const to non-const, as the underlying function will use it in | |
955 | * read-only mode. | |
956 | */ | |
957 | fmem = lttng_fmemopen((void *) filter_expression, | |
958 | strlen(filter_expression), "r"); | |
959 | if (!fmem) { | |
960 | fprintf(stderr, "Error opening memory as stream\n"); | |
961 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
962 | goto error; | |
963 | } | |
964 | ctx = filter_parser_ctx_alloc(fmem); | |
965 | if (!ctx) { | |
966 | fprintf(stderr, "Error allocating parser\n"); | |
967 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
968 | goto filter_alloc_error; | |
969 | } | |
970 | ret = filter_parser_ctx_append_ast(ctx); | |
971 | if (ret) { | |
972 | fprintf(stderr, "Parse error\n"); | |
973 | ret = -LTTNG_ERR_FILTER_INVAL; | |
974 | goto parse_error; | |
975 | } | |
137b9942 DG |
976 | if (print_xml) { |
977 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
978 | if (ret) { | |
979 | fflush(stdout); | |
980 | fprintf(stderr, "XML print error\n"); | |
981 | ret = -LTTNG_ERR_FILTER_INVAL; | |
982 | goto parse_error; | |
983 | } | |
984 | } | |
985 | ||
986 | dbg_printf("Generating IR... "); | |
987 | fflush(stdout); | |
988 | ret = filter_visitor_ir_generate(ctx); | |
989 | if (ret) { | |
990 | fprintf(stderr, "Generate IR error\n"); | |
991 | ret = -LTTNG_ERR_FILTER_INVAL; | |
992 | goto parse_error; | |
993 | } | |
994 | dbg_printf("done\n"); | |
995 | ||
996 | dbg_printf("Validating IR... "); | |
997 | fflush(stdout); | |
998 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
999 | if (ret) { | |
1000 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1001 | goto parse_error; | |
1002 | } | |
9f449915 PP |
1003 | |
1004 | /* Normalize globbing patterns in the expression. */ | |
1005 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
1006 | if (ret) { | |
1007 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1008 | goto parse_error; | |
1009 | } | |
1010 | ||
9ae110e2 | 1011 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
1012 | ret = filter_visitor_ir_validate_string(ctx); |
1013 | if (ret) { | |
1014 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1015 | goto parse_error; | |
1016 | } | |
9f449915 PP |
1017 | |
1018 | /* Validate globbing patterns in the expression. */ | |
1019 | ret = filter_visitor_ir_validate_globbing(ctx); | |
1020 | if (ret) { | |
1021 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1022 | goto parse_error; | |
1023 | } | |
1024 | ||
137b9942 DG |
1025 | dbg_printf("done\n"); |
1026 | ||
1027 | dbg_printf("Generating bytecode... "); | |
1028 | fflush(stdout); | |
1029 | ret = filter_visitor_bytecode_generate(ctx); | |
1030 | if (ret) { | |
1031 | fprintf(stderr, "Generate bytecode error\n"); | |
1032 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1033 | goto parse_error; | |
1034 | } | |
1035 | dbg_printf("done\n"); | |
1036 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
1037 | bytecode_get_len(&ctx->bytecode->b)); | |
1038 | ||
1039 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1040 | + bytecode_get_len(&ctx->bytecode->b); | |
1041 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
1042 | ||
1043 | /* No need to keep the memory stream. */ | |
1044 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1045 | PERROR("fclose"); |
137b9942 DG |
1046 | } |
1047 | ||
1048 | *ctxp = ctx; | |
1049 | return 0; | |
1050 | ||
1051 | parse_error: | |
137b9942 DG |
1052 | filter_ir_free(ctx); |
1053 | filter_parser_ctx_free(ctx); | |
1054 | filter_alloc_error: | |
1055 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1056 | PERROR("fclose"); |
137b9942 DG |
1057 | } |
1058 | error: | |
1059 | return ret; | |
1060 | } | |
1061 | ||
93deb080 JI |
1062 | /* |
1063 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1064 | * If no event name is specified, all events are enabled. | |
1065 | * If no channel name is specified, the default name is used. | |
1066 | * If filter expression is not NULL, the filter is set for the event. | |
1067 | * If exclusion count is not zero, the exclusions are set for the event. | |
1068 | * Returns size of returned session payload data or a negative error code. | |
1069 | */ | |
1070 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1071 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1072 | const char *original_filter_expression, |
93deb080 JI |
1073 | int exclusion_count, char **exclusion_list) |
1074 | { | |
1075 | struct lttcomm_session_msg lsm; | |
15e37663 JG |
1076 | struct lttng_dynamic_buffer send_buffer; |
1077 | int ret = 0, i, fd_to_send = -1; | |
1078 | bool send_fd = false; | |
137b9942 | 1079 | unsigned int free_filter_expression = 0; |
93deb080 | 1080 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1081 | |
6ea91205 YL |
1082 | /* |
1083 | * We have either a filter or some exclusions, so we need to set up | |
1084 | * a variable-length memory block from where to send the data. | |
1085 | */ | |
1086 | lttng_dynamic_buffer_init(&send_buffer); | |
ec005ec6 | 1087 | |
e9efbcd3 JG |
1088 | /* |
1089 | * Cast as non-const since we may replace the filter expression | |
1090 | * by a dynamically allocated string. Otherwise, the original | |
1091 | * string is not modified. | |
1092 | */ | |
1093 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1094 | |
1095 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1096 | ret = -LTTNG_ERR_INVALID; |
1097 | goto error; | |
93deb080 JI |
1098 | } |
1099 | ||
9ae110e2 JG |
1100 | /* |
1101 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1102 | * anyway, so treat this corner-case early to eliminate |
1103 | * lttng_fmemopen error for 0-byte allocation. | |
1104 | */ | |
1105 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1106 | ret = -LTTNG_ERR_INVALID; |
1107 | goto error; | |
93deb080 JI |
1108 | } |
1109 | ||
1110 | memset(&lsm, 0, sizeof(lsm)); | |
1111 | ||
1112 | /* If no channel name, send empty string. */ | |
1113 | if (channel_name == NULL) { | |
1114 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1115 | sizeof(lsm.u.enable.channel_name)); | |
1116 | } else { | |
1117 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1118 | sizeof(lsm.u.enable.channel_name)); | |
1119 | } | |
1120 | ||
18a720cd MD |
1121 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1122 | if (ev->name[0] == '\0') { | |
1123 | /* Enable all events */ | |
1124 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1125 | } |
93deb080 | 1126 | |
6565421f | 1127 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
6e911cad | 1128 | /* FIXME: copying non-packed struct to packed struct. */ |
93deb080 JI |
1129 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1130 | ||
1131 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1132 | sizeof(lsm.session.name)); | |
1133 | lsm.u.enable.exclusion_count = exclusion_count; | |
1134 | lsm.u.enable.bytecode_len = 0; | |
1135 | ||
9ae110e2 | 1136 | /* Parse filter expression. */ |
5cdb6027 | 1137 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1138 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1139 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1140 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1141 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1142 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1143 | char *agent_filter; | |
64226865 | 1144 | |
347c5ab5 | 1145 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1146 | agent_filter = set_agent_filter(filter_expression, ev); |
1147 | if (!agent_filter) { | |
137b9942 | 1148 | if (!filter_expression) { |
9ae110e2 JG |
1149 | /* |
1150 | * No JUL and no filter, just skip | |
1151 | * everything below. | |
1152 | */ | |
137b9942 DG |
1153 | goto ask_sessiond; |
1154 | } | |
64226865 DG |
1155 | } else { |
1156 | /* | |
9ae110e2 JG |
1157 | * With an agent filter, the original filter has |
1158 | * been added to it thus replace the filter | |
1159 | * expression. | |
64226865 | 1160 | */ |
0e115563 | 1161 | filter_expression = agent_filter; |
e9efbcd3 | 1162 | free_filter_expression = 1; |
9b21e6d5 | 1163 | } |
9b21e6d5 | 1164 | } |
93deb080 | 1165 | |
137b9942 | 1166 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1167 | if (ret) { |
137b9942 | 1168 | goto filter_error; |
93deb080 | 1169 | } |
6b453b5e JG |
1170 | } |
1171 | ||
15e37663 JG |
1172 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1173 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1174 | + lsm.u.enable.expression_len |
1175 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1176 | if (ret) { |
6b453b5e | 1177 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1178 | goto mem_error; |
6b453b5e | 1179 | } |
137b9942 | 1180 | |
9ae110e2 | 1181 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1182 | for (i = 0; i < exclusion_count; i++) { |
1183 | size_t exclusion_len; | |
1184 | ||
1185 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1186 | LTTNG_SYMBOL_NAME_LEN); | |
1187 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1188 | /* Exclusion is not NULL-terminated. */ | |
1189 | ret = -LTTNG_ERR_INVALID; | |
1190 | goto mem_error; | |
1191 | } | |
1192 | ||
1193 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1194 | *(exclusion_list + i), | |
1195 | LTTNG_SYMBOL_NAME_LEN); | |
1196 | if (ret) { | |
1197 | goto mem_error; | |
1198 | } | |
6b453b5e | 1199 | } |
15e37663 | 1200 | |
9ae110e2 | 1201 | /* Add filter expression next. */ |
15e37663 JG |
1202 | if (filter_expression) { |
1203 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1204 | filter_expression, lsm.u.enable.expression_len); | |
1205 | if (ret) { | |
1206 | goto mem_error; | |
1207 | } | |
6b453b5e | 1208 | } |
9ae110e2 | 1209 | /* Add filter bytecode next. */ |
137b9942 | 1210 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1211 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1212 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1213 | if (ret) { | |
1214 | goto mem_error; | |
1215 | } | |
1216 | } | |
1217 | if (ev->extended.ptr) { | |
1218 | struct lttng_event_extended *ev_ext = | |
1219 | (struct lttng_event_extended *) ev->extended.ptr; | |
1220 | ||
1221 | if (ev_ext->probe_location) { | |
1222 | /* | |
1223 | * lttng_userspace_probe_location_serialize returns the | |
1224 | * number of bytes that was appended to the buffer. | |
1225 | */ | |
1226 | ret = lttng_userspace_probe_location_serialize( | |
1227 | ev_ext->probe_location, &send_buffer, | |
1228 | &fd_to_send); | |
56f0bc67 | 1229 | if (ret < 0) { |
15e37663 JG |
1230 | goto mem_error; |
1231 | } | |
1232 | ||
1233 | send_fd = fd_to_send >= 0; | |
1234 | /* | |
1235 | * Set the size of the userspace probe location element | |
1236 | * of the buffer so that the receiving side knows where | |
1237 | * to split it. | |
1238 | */ | |
1239 | lsm.u.enable.userspace_probe_location_len = ret; | |
1240 | } | |
93deb080 JI |
1241 | } |
1242 | ||
15e37663 JG |
1243 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1244 | send_fd ? &fd_to_send : NULL, | |
1245 | send_fd ? 1 : 0, | |
1246 | send_buffer.size ? send_buffer.data : NULL, | |
1247 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1248 | |
7ca1dc6f DG |
1249 | mem_error: |
1250 | if (filter_expression && ctx) { | |
93deb080 JI |
1251 | filter_bytecode_free(ctx); |
1252 | filter_ir_free(ctx); | |
1253 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1254 | } |
1255 | filter_error: | |
1256 | if (free_filter_expression) { | |
1257 | /* | |
9ae110e2 JG |
1258 | * The filter expression has been replaced and must be freed as |
1259 | * it is not the original filter expression received as a | |
1260 | * parameter. | |
7ca1dc6f DG |
1261 | */ |
1262 | free(filter_expression); | |
93deb080 | 1263 | } |
137b9942 DG |
1264 | error: |
1265 | /* | |
9ae110e2 JG |
1266 | * Return directly to the caller and don't ask the sessiond since |
1267 | * something went wrong in the parsing of data above. | |
137b9942 | 1268 | */ |
15e37663 | 1269 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1270 | return ret; |
3e1c9ff7 DG |
1271 | |
1272 | ask_sessiond: | |
1273 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1274 | return ret; | |
93deb080 JI |
1275 | } |
1276 | ||
6e911cad MD |
1277 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1278 | struct lttng_event *ev, const char *channel_name, | |
1279 | const char *original_filter_expression) | |
1df4dedd | 1280 | { |
cd80958d | 1281 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1282 | char *varlen_data; |
1283 | int ret = 0; | |
1284 | unsigned int free_filter_expression = 0; | |
1285 | struct filter_parser_ctx *ctx = NULL; | |
1286 | /* | |
1287 | * Cast as non-const since we may replace the filter expression | |
1288 | * by a dynamically allocated string. Otherwise, the original | |
1289 | * string is not modified. | |
1290 | */ | |
1291 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1292 | |
6e911cad MD |
1293 | if (handle == NULL || ev == NULL) { |
1294 | ret = -LTTNG_ERR_INVALID; | |
1295 | goto error; | |
1296 | } | |
1297 | ||
9ae110e2 JG |
1298 | /* |
1299 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1300 | * anyway, so treat this corner-case early to eliminate |
1301 | * lttng_fmemopen error for 0-byte allocation. | |
1302 | */ | |
1303 | if (filter_expression && filter_expression[0] == '\0') { | |
1304 | ret = -LTTNG_ERR_INVALID; | |
1305 | goto error; | |
cd80958d DG |
1306 | } |
1307 | ||
441c16a7 MD |
1308 | memset(&lsm, 0, sizeof(lsm)); |
1309 | ||
85076754 MD |
1310 | /* If no channel name, send empty string. */ |
1311 | if (channel_name == NULL) { | |
1312 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1313 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1314 | } else { |
85076754 | 1315 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1316 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1317 | } |
1318 | ||
18a720cd | 1319 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1320 | |
6e911cad MD |
1321 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
1322 | /* FIXME: copying non-packed struct to packed struct. */ | |
1323 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); | |
1324 | ||
cac3069d | 1325 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1326 | sizeof(lsm.session.name)); |
6e911cad | 1327 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1328 | |
6e911cad MD |
1329 | /* |
1330 | * For the JUL domain, a filter is enforced except for the | |
1331 | * disable all event. This is done to avoid having the event in | |
1332 | * all sessions thus filtering by logger name. | |
1333 | */ | |
1334 | if (filter_expression == NULL && | |
1335 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1336 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1337 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1338 | goto ask_sessiond; |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * We have a filter, so we need to set up a variable-length | |
1343 | * memory block from where to send the data. | |
1344 | */ | |
1345 | ||
1346 | /* Parse filter expression */ | |
1347 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1348 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1349 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1350 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1351 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1352 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1353 | char *agent_filter; | |
6e911cad MD |
1354 | |
1355 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1356 | agent_filter = set_agent_filter(filter_expression, ev); |
1357 | if (!agent_filter) { | |
6e911cad | 1358 | if (!filter_expression) { |
9ae110e2 JG |
1359 | /* |
1360 | * No JUL and no filter, just skip | |
1361 | * everything below. | |
1362 | */ | |
6e911cad MD |
1363 | goto ask_sessiond; |
1364 | } | |
1365 | } else { | |
1366 | /* | |
9ae110e2 JG |
1367 | * With a JUL filter, the original filter has |
1368 | * been added to it thus replace the filter | |
1369 | * expression. | |
6e911cad | 1370 | */ |
0e115563 | 1371 | filter_expression = agent_filter; |
6e911cad MD |
1372 | free_filter_expression = 1; |
1373 | } | |
1374 | } | |
1375 | ||
1376 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1377 | if (ret) { | |
1378 | goto filter_error; | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1383 | + lsm.u.disable.expression_len); | |
1384 | if (!varlen_data) { | |
1385 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1386 | goto mem_error; | |
1387 | } | |
1388 | ||
9ae110e2 | 1389 | /* Add filter expression. */ |
6e911cad MD |
1390 | if (lsm.u.disable.expression_len != 0) { |
1391 | memcpy(varlen_data, | |
1392 | filter_expression, | |
1393 | lsm.u.disable.expression_len); | |
1394 | } | |
9ae110e2 | 1395 | /* Add filter bytecode next. */ |
6e911cad MD |
1396 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1397 | memcpy(varlen_data | |
1398 | + lsm.u.disable.expression_len, | |
1399 | &ctx->bytecode->b, | |
1400 | lsm.u.disable.bytecode_len); | |
1401 | } | |
1402 | ||
795a978d | 1403 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1404 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1405 | free(varlen_data); | |
1406 | ||
1407 | mem_error: | |
1408 | if (filter_expression && ctx) { | |
1409 | filter_bytecode_free(ctx); | |
1410 | filter_ir_free(ctx); | |
1411 | filter_parser_ctx_free(ctx); | |
1412 | } | |
1413 | filter_error: | |
1414 | if (free_filter_expression) { | |
1415 | /* | |
9ae110e2 JG |
1416 | * The filter expression has been replaced and must be freed as |
1417 | * it is not the original filter expression received as a | |
1418 | * parameter. | |
6e911cad MD |
1419 | */ |
1420 | free(filter_expression); | |
1421 | } | |
1422 | error: | |
1423 | /* | |
9ae110e2 JG |
1424 | * Return directly to the caller and don't ask the sessiond since |
1425 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1426 | */ |
1427 | return ret; | |
1428 | ||
1429 | ask_sessiond: | |
1430 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1431 | return ret; | |
1432 | } | |
1433 | ||
1434 | /* | |
9ae110e2 JG |
1435 | * Disable event(s) of a channel and domain. |
1436 | * If no event name is specified, all events are disabled. | |
1437 | * If no channel name is specified, the default 'channel0' is used. | |
1438 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1439 | */ |
1440 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1441 | const char *channel_name) | |
1442 | { | |
1443 | struct lttng_event ev; | |
1444 | ||
1445 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1446 | ev.loglevel = -1; |
6e911cad MD |
1447 | ev.type = LTTNG_EVENT_ALL; |
1448 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1449 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1450 | } |
1451 | ||
cf0bcb51 JG |
1452 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1453 | { | |
1454 | struct lttng_channel *channel = NULL; | |
1455 | struct lttng_channel_extended *extended = NULL; | |
1456 | ||
1457 | if (!domain) { | |
1458 | goto error; | |
1459 | } | |
1460 | ||
1461 | /* Validate domain. */ | |
1462 | switch (domain->type) { | |
1463 | case LTTNG_DOMAIN_UST: | |
1464 | switch (domain->buf_type) { | |
1465 | case LTTNG_BUFFER_PER_UID: | |
1466 | case LTTNG_BUFFER_PER_PID: | |
1467 | break; | |
1468 | default: | |
1469 | goto error; | |
1470 | } | |
1471 | break; | |
1472 | case LTTNG_DOMAIN_KERNEL: | |
1473 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1474 | goto error; | |
1475 | } | |
1476 | break; | |
1477 | default: | |
1478 | goto error; | |
1479 | } | |
1480 | ||
1481 | channel = zmalloc(sizeof(*channel)); | |
1482 | if (!channel) { | |
1483 | goto error; | |
1484 | } | |
1485 | ||
1486 | extended = zmalloc(sizeof(*extended)); | |
1487 | if (!extended) { | |
1488 | goto error; | |
1489 | } | |
1490 | ||
1491 | channel->attr.extended.ptr = extended; | |
1492 | ||
1493 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1494 | return channel; | |
1495 | error: | |
1496 | free(channel); | |
1497 | free(extended); | |
1498 | return NULL; | |
1499 | } | |
1500 | ||
1501 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1502 | { | |
1503 | if (!channel) { | |
1504 | return; | |
1505 | } | |
1506 | ||
1507 | if (channel->attr.extended.ptr) { | |
1508 | free(channel->attr.extended.ptr); | |
1509 | } | |
1510 | free(channel); | |
1511 | } | |
1512 | ||
1df4dedd | 1513 | /* |
9ae110e2 JG |
1514 | * Enable channel per domain |
1515 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1516 | */ |
cd80958d | 1517 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1518 | struct lttng_channel *in_chan) |
a5c5a2bd | 1519 | { |
cd80958d | 1520 | struct lttcomm_session_msg lsm; |
e3091d6a | 1521 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1522 | |
9ae110e2 | 1523 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1524 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1525 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1526 | } |
1527 | ||
441c16a7 | 1528 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1529 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1530 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1531 | |
cf0bcb51 JG |
1532 | if (!in_chan->attr.extended.ptr) { |
1533 | struct lttng_channel *channel; | |
1534 | struct lttng_channel_extended *extended; | |
7d29a247 | 1535 | |
cf0bcb51 JG |
1536 | channel = lttng_channel_create(&handle->domain); |
1537 | if (!channel) { | |
1538 | return -LTTNG_ERR_NOMEM; | |
1539 | } | |
1540 | ||
1541 | /* | |
1542 | * Create a new channel in order to use default extended | |
1543 | * attribute values. | |
1544 | */ | |
1545 | extended = (struct lttng_channel_extended *) | |
1546 | channel->attr.extended.ptr; | |
1547 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1548 | lttng_channel_destroy(channel); | |
1549 | } else { | |
1550 | struct lttng_channel_extended *extended; | |
1551 | ||
1552 | extended = (struct lttng_channel_extended *) | |
1553 | in_chan->attr.extended.ptr; | |
1554 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1555 | } | |
cd80958d | 1556 | |
e3091d6a FD |
1557 | /* |
1558 | * Verify that the amount of memory required to create the requested | |
1559 | * buffer is available on the system at the moment. | |
1560 | */ | |
1561 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1562 | lsm.u.channel.chan.attr.subbuf_size; | |
1563 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1564 | return -LTTNG_ERR_NOMEM; | |
1565 | } | |
1566 | ||
cf0bcb51 | 1567 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
cac3069d | 1568 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
7d29a247 | 1569 | |
cac3069d | 1570 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1571 | sizeof(lsm.session.name)); |
1572 | ||
cac3069d | 1573 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1574 | } |
1df4dedd | 1575 | |
2ef84c95 | 1576 | /* |
9ae110e2 JG |
1577 | * All tracing will be stopped for registered events of the channel. |
1578 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1579 | */ |
cd80958d | 1580 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1581 | { |
cd80958d DG |
1582 | struct lttcomm_session_msg lsm; |
1583 | ||
9ae110e2 | 1584 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1585 | if (handle == NULL || name == NULL) { |
2f70b271 | 1586 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1587 | } |
1588 | ||
441c16a7 MD |
1589 | memset(&lsm, 0, sizeof(lsm)); |
1590 | ||
cd80958d | 1591 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1592 | |
cac3069d | 1593 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1594 | sizeof(lsm.u.disable.channel_name)); |
1595 | ||
cac3069d | 1596 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
cd80958d | 1597 | |
cac3069d | 1598 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1599 | sizeof(lsm.session.name)); |
1600 | ||
cac3069d | 1601 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1602 | } |
1603 | ||
ccf10263 | 1604 | /* |
9ae110e2 JG |
1605 | * Add PID to session tracker. |
1606 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1607 | */ |
1608 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1609 | { | |
1610 | struct lttcomm_session_msg lsm; | |
1611 | ||
9ae110e2 | 1612 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1613 | if (handle == NULL) { |
1614 | return -LTTNG_ERR_INVALID; | |
1615 | } | |
1616 | ||
1617 | memset(&lsm, 0, sizeof(lsm)); | |
1618 | ||
1619 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1620 | lsm.u.pid_tracker.pid = pid; | |
1621 | ||
1622 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1623 | ||
1624 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1625 | sizeof(lsm.session.name)); | |
1626 | ||
1627 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1628 | } | |
1629 | ||
1630 | /* | |
9ae110e2 JG |
1631 | * Remove PID from session tracker. |
1632 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1633 | */ |
1634 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1635 | { | |
1636 | struct lttcomm_session_msg lsm; | |
1637 | ||
9ae110e2 | 1638 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1639 | if (handle == NULL) { |
1640 | return -LTTNG_ERR_INVALID; | |
1641 | } | |
1642 | ||
1643 | memset(&lsm, 0, sizeof(lsm)); | |
1644 | ||
1645 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1646 | lsm.u.pid_tracker.pid = pid; | |
1647 | ||
1648 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
1649 | ||
1650 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1651 | sizeof(lsm.session.name)); | |
1652 | ||
1653 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1654 | } | |
1655 | ||
fac6795d | 1656 | /* |
9ae110e2 JG |
1657 | * Lists all available tracepoints of domain. |
1658 | * Sets the contents of the events array. | |
1659 | * Returns the number of lttng_event entries in events; | |
1660 | * on error, returns a negative value. | |
fac6795d | 1661 | */ |
cd80958d | 1662 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1663 | struct lttng_event **events) |
fac6795d | 1664 | { |
052da939 | 1665 | int ret; |
cd80958d DG |
1666 | struct lttcomm_session_msg lsm; |
1667 | ||
9d697d3d | 1668 | if (handle == NULL) { |
2f70b271 | 1669 | return -LTTNG_ERR_INVALID; |
cd80958d | 1670 | } |
fac6795d | 1671 | |
53efb85a | 1672 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1673 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
cac3069d | 1674 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
2a71efd5 | 1675 | |
cac3069d | 1676 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1677 | if (ret < 0) { |
1678 | return ret; | |
eb354453 | 1679 | } |
fac6795d | 1680 | |
9f19cc17 | 1681 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1682 | } |
1683 | ||
f37d259d | 1684 | /* |
9ae110e2 JG |
1685 | * Lists all available tracepoint fields of domain. |
1686 | * Sets the contents of the event field array. | |
1687 | * Returns the number of lttng_event_field entries in events; | |
1688 | * on error, returns a negative value. | |
f37d259d MD |
1689 | */ |
1690 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1691 | struct lttng_event_field **fields) | |
1692 | { | |
1693 | int ret; | |
1694 | struct lttcomm_session_msg lsm; | |
1695 | ||
1696 | if (handle == NULL) { | |
2f70b271 | 1697 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1698 | } |
1699 | ||
53efb85a | 1700 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1701 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
cac3069d | 1702 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
f37d259d | 1703 | |
cac3069d | 1704 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1705 | if (ret < 0) { |
1706 | return ret; | |
1707 | } | |
1708 | ||
1709 | return ret / sizeof(struct lttng_event_field); | |
1710 | } | |
1711 | ||
834978fd | 1712 | /* |
9ae110e2 JG |
1713 | * Lists all available kernel system calls. Allocates and sets the contents of |
1714 | * the events array. | |
834978fd | 1715 | * |
9ae110e2 JG |
1716 | * Returns the number of lttng_event entries in events; on error, returns a |
1717 | * negative value. | |
834978fd DG |
1718 | */ |
1719 | int lttng_list_syscalls(struct lttng_event **events) | |
1720 | { | |
1721 | int ret; | |
1722 | struct lttcomm_session_msg lsm; | |
1723 | ||
1724 | if (!events) { | |
1725 | return -LTTNG_ERR_INVALID; | |
1726 | } | |
1727 | ||
1728 | memset(&lsm, 0, sizeof(lsm)); | |
1729 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1730 | /* Force kernel domain for system calls. */ | |
1731 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1732 | ||
1733 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1734 | if (ret < 0) { | |
1735 | return ret; | |
1736 | } | |
1737 | ||
1738 | return ret / sizeof(struct lttng_event); | |
1739 | } | |
1740 | ||
1657e9bb | 1741 | /* |
9ae110e2 JG |
1742 | * Returns a human readable string describing |
1743 | * the error code (a negative value). | |
1657e9bb | 1744 | */ |
9a745bc7 | 1745 | const char *lttng_strerror(int code) |
1657e9bb | 1746 | { |
f73fabfd | 1747 | return error_get_str(code); |
1657e9bb DG |
1748 | } |
1749 | ||
5feee503 JG |
1750 | enum lttng_error_code lttng_create_session_ext( |
1751 | struct lttng_session_descriptor *session_descriptor) | |
1752 | { | |
1753 | enum lttng_error_code ret_code; | |
1754 | struct lttcomm_session_msg lsm = { | |
1755 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1756 | }; | |
1757 | void *reply = NULL; | |
1758 | struct lttng_buffer_view reply_view; | |
1759 | int reply_ret; | |
1760 | bool sessiond_must_generate_ouput; | |
1761 | struct lttng_dynamic_buffer payload; | |
1762 | int ret; | |
1763 | size_t descriptor_size; | |
1764 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1765 | ||
1766 | lttng_dynamic_buffer_init(&payload); | |
1767 | if (!session_descriptor) { | |
1768 | ret_code = LTTNG_ERR_INVALID; | |
1769 | goto end; | |
1770 | } | |
1771 | ||
1772 | sessiond_must_generate_ouput = | |
1773 | !lttng_session_descriptor_is_output_destination_initialized( | |
1774 | session_descriptor); | |
1775 | if (sessiond_must_generate_ouput) { | |
1776 | const char *home_dir = utils_get_home_dir(); | |
1777 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1778 | ||
1779 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1780 | ret_code = LTTNG_ERR_FATAL; | |
1781 | goto end; | |
1782 | } | |
1783 | ||
1784 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1785 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1786 | home_dir_len); | |
1787 | if (ret) { | |
1788 | ret_code = LTTNG_ERR_NOMEM; | |
1789 | goto end; | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | descriptor_size = payload.size; | |
1794 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1795 | &payload); | |
1796 | if (ret) { | |
1797 | ret_code = LTTNG_ERR_INVALID; | |
1798 | goto end; | |
1799 | } | |
1800 | descriptor_size = payload.size - descriptor_size; | |
1801 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1802 | ||
1803 | /* Command returns a session descriptor on success. */ | |
1804 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1805 | payload.size, &reply); | |
1806 | if (reply_ret < 0) { | |
1807 | ret_code = -reply_ret; | |
1808 | goto end; | |
1809 | } else if (reply_ret == 0) { | |
1810 | /* Socket unexpectedly closed by the session daemon. */ | |
1811 | ret_code = LTTNG_ERR_FATAL; | |
1812 | goto end; | |
1813 | } | |
1814 | ||
1815 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1816 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1817 | &descriptor_reply); | |
1818 | if (ret < 0) { | |
1819 | ret_code = LTTNG_ERR_FATAL; | |
1820 | goto end; | |
1821 | } | |
1822 | ret_code = LTTNG_OK; | |
1823 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1824 | end: | |
1825 | free(reply); | |
1826 | lttng_dynamic_buffer_reset(&payload); | |
1827 | lttng_session_descriptor_destroy(descriptor_reply); | |
1828 | return ret_code; | |
1829 | } | |
1830 | ||
aaf97519 | 1831 | /* |
5feee503 | 1832 | * Create a new session using name and url for destination. |
a4b92340 | 1833 | * |
f73fabfd | 1834 | * Returns LTTNG_OK on success or a negative error code. |
00e2e675 | 1835 | */ |
a4b92340 | 1836 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1837 | { |
3dd05a85 | 1838 | int ret; |
a4b92340 | 1839 | ssize_t size; |
a4b92340 | 1840 | struct lttng_uri *uris = NULL; |
5feee503 JG |
1841 | struct lttng_session_descriptor *descriptor = NULL; |
1842 | enum lttng_error_code ret_code; | |
00e2e675 | 1843 | |
5feee503 JG |
1844 | if (!name) { |
1845 | ret = -LTTNG_ERR_INVALID; | |
1846 | goto end; | |
00e2e675 DG |
1847 | } |
1848 | ||
bc894455 | 1849 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1850 | if (size < 0) { |
5feee503 JG |
1851 | ret = -LTTNG_ERR_INVALID; |
1852 | goto end; | |
1853 | } | |
1854 | switch (size) { | |
1855 | case 0: | |
1856 | descriptor = lttng_session_descriptor_create(name); | |
1857 | break; | |
1858 | case 1: | |
1859 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1860 | ret = -LTTNG_ERR_INVALID; | |
1861 | goto end; | |
1862 | } | |
1863 | descriptor = lttng_session_descriptor_local_create(name, | |
1864 | uris[0].dst.path); | |
1865 | break; | |
1866 | case 2: | |
1867 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1868 | NULL); | |
1869 | break; | |
1870 | default: | |
1871 | ret = -LTTNG_ERR_INVALID; | |
1872 | goto end; | |
1873 | } | |
1874 | if (!descriptor) { | |
1875 | ret = -LTTNG_ERR_INVALID; | |
1876 | goto end; | |
00e2e675 | 1877 | } |
5feee503 JG |
1878 | ret_code = lttng_create_session_ext(descriptor); |
1879 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1880 | end: | |
1881 | lttng_session_descriptor_destroy(descriptor); | |
1882 | free(uris); | |
1883 | return ret; | |
1884 | } | |
00e2e675 | 1885 | |
5feee503 JG |
1886 | /* |
1887 | * Create a session exclusively used for snapshot. | |
1888 | * | |
1889 | * Returns LTTNG_OK on success or a negative error code. | |
1890 | */ | |
1891 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1892 | { | |
1893 | int ret; | |
1894 | enum lttng_error_code ret_code; | |
1895 | ssize_t size; | |
1896 | struct lttng_uri *uris = NULL; | |
1897 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1898 | |
5feee503 JG |
1899 | if (!name) { |
1900 | ret = -LTTNG_ERR_INVALID; | |
1901 | goto end; | |
1902 | } | |
1903 | ||
1904 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1905 | if (size < 0) { | |
1906 | ret = -LTTNG_ERR_INVALID; | |
1907 | goto end; | |
1908 | } | |
1909 | /* | |
1910 | * If the user does not specify a custom subdir, use the session name. | |
1911 | */ | |
1912 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1913 | strlen(uris[0].subdir) == 0) { | |
1914 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1915 | name); | |
1916 | if (ret < 0) { | |
1917 | PERROR("Failed to set session name as network destination sub-directory"); | |
1918 | ret = -LTTNG_ERR_FATAL; | |
1919 | goto end; | |
1920 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1921 | /* Truncated output. */ | |
1922 | ret = -LTTNG_ERR_INVALID; | |
1923 | goto end; | |
1924 | } | |
1925 | } | |
3dd05a85 | 1926 | |
5feee503 JG |
1927 | switch (size) { |
1928 | case 0: | |
1929 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1930 | break; | |
1931 | case 1: | |
1932 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1933 | ret = -LTTNG_ERR_INVALID; | |
1934 | goto end; | |
1935 | } | |
1936 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1937 | name, | |
1938 | uris[0].dst.path); | |
1939 | break; | |
1940 | case 2: | |
1941 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1942 | name, | |
1943 | snapshot_url, | |
1944 | NULL); | |
1945 | break; | |
1946 | default: | |
1947 | ret = -LTTNG_ERR_INVALID; | |
1948 | goto end; | |
1949 | } | |
1950 | if (!descriptor) { | |
1951 | ret = -LTTNG_ERR_INVALID; | |
1952 | goto end; | |
1953 | } | |
1954 | ret_code = lttng_create_session_ext(descriptor); | |
1955 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1956 | end: | |
1957 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1958 | free(uris); |
1959 | return ret; | |
00e2e675 DG |
1960 | } |
1961 | ||
5feee503 JG |
1962 | /* |
1963 | * Create a session exclusively used for live. | |
1964 | * | |
1965 | * Returns LTTNG_OK on success or a negative error code. | |
1966 | */ | |
1967 | int lttng_create_session_live(const char *name, const char *url, | |
1968 | unsigned int timer_interval) | |
1969 | { | |
1970 | int ret; | |
1971 | enum lttng_error_code ret_code; | |
1972 | struct lttng_session_descriptor *descriptor = NULL; | |
1973 | ||
1974 | if (!name) { | |
1975 | ret = -LTTNG_ERR_INVALID; | |
1976 | goto end; | |
1977 | } | |
1978 | ||
1979 | if (url) { | |
1980 | descriptor = lttng_session_descriptor_live_network_create( | |
1981 | name, url, NULL, timer_interval); | |
1982 | } else { | |
1983 | descriptor = lttng_session_descriptor_live_create( | |
1984 | name, timer_interval); | |
1985 | } | |
1986 | if (!descriptor) { | |
1987 | ret = -LTTNG_ERR_INVALID; | |
1988 | goto end; | |
1989 | } | |
1990 | ret_code = lttng_create_session_ext(descriptor); | |
1991 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1992 | end: | |
1993 | lttng_session_descriptor_destroy(descriptor); | |
1994 | return ret; | |
1995 | } | |
1996 | ||
e20ee7c2 JD |
1997 | /* |
1998 | * Stop the session and wait for the data before destroying it | |
1999 | */ | |
2000 | int lttng_destroy_session(const char *session_name) | |
2001 | { | |
2002 | int ret; | |
823a1989 JG |
2003 | enum lttng_error_code ret_code; |
2004 | enum lttng_destruction_handle_status status; | |
2005 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2006 | |
2007 | /* | |
823a1989 JG |
2008 | * Stop the tracing and wait for the data to be |
2009 | * consumed. | |
e20ee7c2 JD |
2010 | */ |
2011 | ret = _lttng_stop_tracing(session_name, 1); | |
2012 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2013 | goto end; | |
2014 | } | |
2015 | ||
823a1989 JG |
2016 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2017 | if (ret_code != LTTNG_OK) { | |
2018 | ret = (int) -ret_code; | |
2019 | goto end; | |
2020 | } | |
2021 | assert(handle); | |
2022 | ||
2023 | /* Block until the completion of the destruction of the session. */ | |
2024 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2025 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2026 | ret = -LTTNG_ERR_UNK; | |
2027 | goto end; | |
2028 | } | |
2029 | ||
2030 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2031 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2032 | ret = -LTTNG_ERR_UNK; | |
2033 | goto end; | |
2034 | } | |
2035 | ret = ret_code == LTTNG_OK ? LTTNG_OK : -ret_code; | |
e20ee7c2 | 2036 | end: |
823a1989 | 2037 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2038 | return ret; |
2039 | } | |
2040 | ||
2041 | /* | |
2042 | * Destroy the session without waiting for the data. | |
2043 | */ | |
2044 | int lttng_destroy_session_no_wait(const char *session_name) | |
2045 | { | |
823a1989 | 2046 | enum lttng_error_code ret_code; |
e20ee7c2 | 2047 | |
823a1989 JG |
2048 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
2049 | return ret_code == LTTNG_OK ? ret_code : -ret_code; | |
e20ee7c2 JD |
2050 | } |
2051 | ||
57167058 | 2052 | /* |
9ae110e2 JG |
2053 | * Ask the session daemon for all available sessions. |
2054 | * Sets the contents of the sessions array. | |
2055 | * Returns the number of lttng_session entries in sessions; | |
2056 | * on error, returns a negative value. | |
57167058 | 2057 | */ |
5feee503 | 2058 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2059 | { |
ca95a216 | 2060 | int ret; |
cd80958d | 2061 | struct lttcomm_session_msg lsm; |
5feee503 JG |
2062 | const size_t session_size = sizeof(struct lttng_session) + |
2063 | sizeof(struct lttng_session_extended); | |
2064 | size_t session_count, i; | |
2065 | struct lttng_session_extended *sessions_extended_begin; | |
2066 | struct lttng_session *sessions = NULL; | |
57167058 | 2067 | |
53efb85a | 2068 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2069 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
5feee503 JG |
2070 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2071 | if (ret <= 0) { | |
5feee503 JG |
2072 | goto end; |
2073 | } | |
2074 | if (!sessions) { | |
2075 | ret = -LTTNG_ERR_FATAL; | |
2076 | goto end; | |
2077 | } | |
2078 | ||
2079 | if (ret % session_size) { | |
2080 | ret = -LTTNG_ERR_UNK; | |
2081 | free(sessions); | |
2082 | *out_sessions = NULL; | |
2083 | goto end; | |
57167058 | 2084 | } |
5feee503 JG |
2085 | session_count = (size_t) ret / session_size; |
2086 | sessions_extended_begin = (struct lttng_session_extended *) | |
2087 | (&sessions[session_count]); | |
57167058 | 2088 | |
5feee503 JG |
2089 | /* Set extended session info pointers. */ |
2090 | for (i = 0; i < session_count; i++) { | |
2091 | struct lttng_session *session = &sessions[i]; | |
2092 | struct lttng_session_extended *extended = | |
2093 | &(sessions_extended_begin[i]); | |
2094 | ||
2095 | session->extended.ptr = extended; | |
2096 | } | |
2097 | ||
2098 | ret = (int) session_count; | |
2099 | *out_sessions = sessions; | |
2100 | end: | |
2101 | return ret; | |
2102 | } | |
2103 | ||
2104 | enum lttng_error_code lttng_session_get_creation_time( | |
2105 | const struct lttng_session *session, uint64_t *creation_time) | |
2106 | { | |
2107 | enum lttng_error_code ret = LTTNG_OK; | |
2108 | struct lttng_session_extended *extended; | |
2109 | ||
2110 | if (!session || !creation_time || !session->extended.ptr) { | |
2111 | ret = LTTNG_ERR_INVALID; | |
2112 | goto end; | |
2113 | } | |
2114 | ||
2115 | extended = session->extended.ptr; | |
2116 | if (!extended->creation_time.is_set) { | |
2117 | /* Not created on the session daemon yet. */ | |
2118 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2119 | goto end; | |
2120 | } | |
2121 | *creation_time = extended->creation_time.value; | |
2122 | end: | |
2123 | return ret; | |
57167058 DG |
2124 | } |
2125 | ||
d7ba1388 MD |
2126 | int lttng_set_session_shm_path(const char *session_name, |
2127 | const char *shm_path) | |
2128 | { | |
2129 | struct lttcomm_session_msg lsm; | |
2130 | ||
2131 | if (session_name == NULL) { | |
2132 | return -LTTNG_ERR_INVALID; | |
2133 | } | |
2134 | ||
2135 | memset(&lsm, 0, sizeof(lsm)); | |
2136 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2137 | ||
2138 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2139 | sizeof(lsm.session.name)); | |
2140 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
2141 | sizeof(lsm.u.set_shm_path.shm_path)); | |
2142 | ||
2143 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
2144 | } | |
2145 | ||
9f19cc17 | 2146 | /* |
9ae110e2 JG |
2147 | * Ask the session daemon for all available domains of a session. |
2148 | * Sets the contents of the domains array. | |
2149 | * Returns the number of lttng_domain entries in domains; | |
2150 | * on error, returns a negative value. | |
9f19cc17 | 2151 | */ |
330be774 | 2152 | int lttng_list_domains(const char *session_name, |
cd80958d | 2153 | struct lttng_domain **domains) |
9f19cc17 DG |
2154 | { |
2155 | int ret; | |
cd80958d DG |
2156 | struct lttcomm_session_msg lsm; |
2157 | ||
330be774 | 2158 | if (session_name == NULL) { |
2f70b271 | 2159 | return -LTTNG_ERR_INVALID; |
cd80958d | 2160 | } |
9f19cc17 | 2161 | |
53efb85a | 2162 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2163 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2164 | ||
cac3069d DG |
2165 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2166 | sizeof(lsm.session.name)); | |
cd80958d | 2167 | |
cac3069d | 2168 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
2169 | if (ret < 0) { |
2170 | return ret; | |
2171 | } | |
2172 | ||
2173 | return ret / sizeof(struct lttng_domain); | |
2174 | } | |
2175 | ||
2176 | /* | |
9ae110e2 JG |
2177 | * Ask the session daemon for all available channels of a session. |
2178 | * Sets the contents of the channels array. | |
2179 | * Returns the number of lttng_channel entries in channels; | |
2180 | * on error, returns a negative value. | |
9f19cc17 | 2181 | */ |
cd80958d DG |
2182 | int lttng_list_channels(struct lttng_handle *handle, |
2183 | struct lttng_channel **channels) | |
9f19cc17 DG |
2184 | { |
2185 | int ret; | |
53e367f9 JG |
2186 | size_t channel_count, i; |
2187 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2188 | sizeof(struct lttng_channel_extended); |
cd80958d | 2189 | struct lttcomm_session_msg lsm; |
53e367f9 | 2190 | void *extended_at; |
cd80958d | 2191 | |
9d697d3d | 2192 | if (handle == NULL) { |
53e367f9 JG |
2193 | ret = -LTTNG_ERR_INVALID; |
2194 | goto end; | |
cd80958d DG |
2195 | } |
2196 | ||
53efb85a | 2197 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2198 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 2199 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2200 | sizeof(lsm.session.name)); |
9f19cc17 | 2201 | |
cac3069d | 2202 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 2203 | |
cac3069d | 2204 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2205 | if (ret < 0) { |
53e367f9 JG |
2206 | goto end; |
2207 | } | |
2208 | ||
2209 | if (ret % channel_size) { | |
2210 | ret = -LTTNG_ERR_UNK; | |
2211 | free(*channels); | |
2212 | *channels = NULL; | |
2213 | goto end; | |
9f19cc17 | 2214 | } |
53e367f9 | 2215 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2216 | |
53e367f9 JG |
2217 | /* Set extended info pointers */ |
2218 | extended_at = ((void *) *channels) + | |
2219 | channel_count * sizeof(struct lttng_channel); | |
2220 | for (i = 0; i < channel_count; i++) { | |
2221 | struct lttng_channel *chan = &(*channels)[i]; | |
2222 | ||
2223 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2224 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2225 | } |
2226 | ||
2227 | ret = (int) channel_count; | |
2228 | end: | |
2229 | return ret; | |
9f19cc17 DG |
2230 | } |
2231 | ||
2232 | /* | |
9ae110e2 JG |
2233 | * Ask the session daemon for all available events of a session channel. |
2234 | * Sets the contents of the events array. | |
2235 | * Returns the number of lttng_event entries in events; | |
2236 | * on error, returns a negative value. | |
9f19cc17 | 2237 | */ |
cd80958d DG |
2238 | int lttng_list_events(struct lttng_handle *handle, |
2239 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2240 | { |
2241 | int ret; | |
cd80958d | 2242 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
2243 | struct lttcomm_event_command_header *cmd_header = NULL; |
2244 | size_t cmd_header_len; | |
2245 | uint32_t nb_events, i; | |
de453daa | 2246 | void *comm_ext_at; |
de453daa | 2247 | char *reception_buffer = NULL; |
56f0bc67 | 2248 | struct lttng_dynamic_buffer listing; |
de453daa | 2249 | size_t storage_req; |
9f19cc17 | 2250 | |
9d697d3d DG |
2251 | /* Safety check. An handle and channel name are mandatory */ |
2252 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 2253 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
2254 | } |
2255 | ||
53efb85a | 2256 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2257 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 2258 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2259 | sizeof(lsm.session.name)); |
cac3069d | 2260 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 2261 | sizeof(lsm.u.list.channel_name)); |
cac3069d | 2262 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
9f19cc17 | 2263 | |
a04d53fc | 2264 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
2265 | (void **) &reception_buffer, (void **) &cmd_header, |
2266 | &cmd_header_len); | |
9f19cc17 | 2267 | if (ret < 0) { |
de453daa | 2268 | goto end; |
9f19cc17 DG |
2269 | } |
2270 | ||
d9f484bc JG |
2271 | if (!cmd_header) { |
2272 | ret = -LTTNG_ERR_UNK; | |
2273 | goto end; | |
2274 | } | |
2275 | ||
b4e3ceb9 PP |
2276 | /* Set number of events and free command header */ |
2277 | nb_events = cmd_header->nb_events; | |
2278 | if (nb_events > INT_MAX) { | |
2279 | ret = -EOVERFLOW; | |
de453daa | 2280 | goto end; |
b4e3ceb9 | 2281 | } |
b4e3ceb9 PP |
2282 | free(cmd_header); |
2283 | cmd_header = NULL; | |
2284 | ||
de453daa JG |
2285 | /* |
2286 | * The buffer that is returned must contain a "flat" version of | |
2287 | * the events that are returned. In other words, all pointers | |
2288 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2289 | * buffer so that the user may free everything by simply calling free() |
2290 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2291 | * compatibility. |
2292 | * | |
56f0bc67 JG |
2293 | * A first pass is performed to compute the size of the buffer that |
2294 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2295 | * the returned events so that their members always point within the |
2296 | * buffer. | |
2297 | * | |
2298 | * The layout of the returned buffer is as follows: | |
2299 | * - struct lttng_event[nb_events], | |
2300 | * - nb_events times the following: | |
2301 | * - struct lttng_event_extended, | |
2302 | * - flattened version of userspace_probe_location | |
2303 | * - filter_expression | |
2304 | * - exclusions | |
2305 | * - padding to align to 64-bits | |
2306 | */ | |
2307 | comm_ext_at = reception_buffer + | |
2308 | (nb_events * sizeof(struct lttng_event)); | |
2309 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
2310 | |
2311 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
2312 | struct lttcomm_event_extended_header *ext_comm = |
2313 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 2314 | int probe_storage_req = 0; |
b4e3ceb9 | 2315 | |
de453daa JG |
2316 | comm_ext_at += sizeof(*ext_comm); |
2317 | comm_ext_at += ext_comm->filter_len; | |
2318 | comm_ext_at += | |
2319 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2320 | ||
56f0bc67 JG |
2321 | if (ext_comm->userspace_probe_location_len) { |
2322 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2323 | struct lttng_buffer_view probe_location_view; | |
2324 | ||
2325 | probe_location_view = lttng_buffer_view_init( | |
2326 | comm_ext_at, 0, | |
2327 | ext_comm->userspace_probe_location_len); | |
2328 | ||
2329 | /* | |
2330 | * Create a temporary userspace probe location to | |
2331 | * determine the size needed by a "flattened" version | |
2332 | * of that same probe location. | |
2333 | */ | |
2334 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2335 | &probe_location_view, &probe_location); | |
2336 | if (ret < 0) { | |
2337 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2338 | goto end; | |
2339 | } | |
2340 | ||
2341 | ret = lttng_userspace_probe_location_flatten( | |
2342 | probe_location, NULL); | |
2343 | lttng_userspace_probe_location_destroy(probe_location); | |
2344 | if (ret < 0) { | |
2345 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2346 | goto end; | |
2347 | } | |
2348 | ||
2349 | probe_storage_req = ret; | |
2350 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2351 | } |
2352 | ||
de453daa | 2353 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2354 | storage_req += ext_comm->filter_len; |
2355 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2356 | /* Padding to ensure the flat probe is aligned. */ |
2357 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2358 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2359 | } |
2360 | ||
56f0bc67 JG |
2361 | lttng_dynamic_buffer_init(&listing); |
2362 | /* | |
2363 | * We must ensure that "listing" is never resized so as to preserve | |
2364 | * the validity of the flattened objects. | |
2365 | */ | |
2366 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2367 | if (ret) { | |
2368 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2369 | goto end; |
2370 | } | |
56f0bc67 JG |
2371 | |
2372 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2373 | nb_events * sizeof(struct lttng_event)); | |
2374 | if (ret) { | |
2375 | ret = -LTTNG_ERR_NOMEM; | |
2376 | goto free_dynamic_buffer; | |
2377 | } | |
de453daa JG |
2378 | |
2379 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2380 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2381 | for (i = 0; i < nb_events; i++) { |
2382 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2383 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2384 | struct lttcomm_event_extended_header *ext_comm = |
2385 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2386 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2387 | (struct lttng_event_extended *) |
2388 | (listing.data + listing.size); | |
de453daa | 2389 | |
56f0bc67 JG |
2390 | /* Insert struct lttng_event_extended. */ |
2391 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2392 | listing.size + sizeof(*event_extended)); | |
2393 | if (ret) { | |
2394 | ret = -LTTNG_ERR_NOMEM; | |
2395 | goto free_dynamic_buffer; | |
2396 | } | |
de453daa | 2397 | event->extended.ptr = event_extended; |
56f0bc67 | 2398 | |
de453daa JG |
2399 | comm_ext_at += sizeof(*ext_comm); |
2400 | ||
56f0bc67 JG |
2401 | /* Insert filter expression. */ |
2402 | if (ext_comm->filter_len) { | |
2403 | event_extended->filter_expression = listing.data + | |
2404 | listing.size; | |
2405 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2406 | ext_comm->filter_len); | |
2407 | if (ret) { | |
2408 | ret = -LTTNG_ERR_NOMEM; | |
2409 | goto free_dynamic_buffer; | |
2410 | } | |
2411 | comm_ext_at += ext_comm->filter_len; | |
2412 | } | |
2413 | ||
2414 | /* Insert exclusions. */ | |
2415 | if (ext_comm->nb_exclusions) { | |
2416 | event_extended->exclusions.count = | |
2417 | ext_comm->nb_exclusions; | |
2418 | event_extended->exclusions.strings = | |
2419 | listing.data + listing.size; | |
2420 | ||
2421 | ret = lttng_dynamic_buffer_append(&listing, | |
2422 | comm_ext_at, | |
2423 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2424 | if (ret) { | |
2425 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2426 | goto free_dynamic_buffer; |
56f0bc67 JG |
2427 | } |
2428 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2429 | } | |
2430 | ||
2431 | /* Insert padding to align to 64-bits. */ | |
2432 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2433 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2434 | if (ret) { | |
2435 | ret = -LTTNG_ERR_NOMEM; | |
2436 | goto free_dynamic_buffer; | |
2437 | } | |
2438 | ||
2439 | /* Insert flattened userspace probe location. */ | |
2440 | if (ext_comm->userspace_probe_location_len) { | |
2441 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2442 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2443 | |
56f0bc67 JG |
2444 | probe_location_view = lttng_buffer_view_init( |
2445 | comm_ext_at, 0, | |
2446 | ext_comm->userspace_probe_location_len); | |
de453daa | 2447 | |
56f0bc67 JG |
2448 | ret = lttng_userspace_probe_location_create_from_buffer( |
2449 | &probe_location_view, &probe_location); | |
2450 | if (ret < 0) { | |
2451 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2452 | goto free_dynamic_buffer; | |
2453 | } | |
2454 | ||
2455 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2456 | (listing.data + listing.size); | |
2457 | ret = lttng_userspace_probe_location_flatten( | |
2458 | probe_location, &listing); | |
2459 | lttng_userspace_probe_location_destroy(probe_location); | |
2460 | if (ret < 0) { | |
2461 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2462 | goto free_dynamic_buffer; | |
2463 | } | |
2464 | ||
2465 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2466 | } | |
de453daa JG |
2467 | } |
2468 | ||
56f0bc67 JG |
2469 | /* Don't reset listing buffer as we return its content. */ |
2470 | *events = (struct lttng_event *) listing.data; | |
2471 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2472 | ret = (int) nb_events; |
56f0bc67 JG |
2473 | free_dynamic_buffer: |
2474 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2475 | end: |
b4e3ceb9 | 2476 | free(cmd_header); |
de453daa | 2477 | free(reception_buffer); |
b4e3ceb9 | 2478 | return ret; |
9f19cc17 DG |
2479 | } |
2480 | ||
fac6795d | 2481 | /* |
1c8d13c8 TD |
2482 | * Sets the tracing_group variable with name. |
2483 | * This function allocates memory pointed to by tracing_group. | |
2484 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2485 | */ |
2486 | int lttng_set_tracing_group(const char *name) | |
2487 | { | |
9d697d3d | 2488 | if (name == NULL) { |
2f70b271 | 2489 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2490 | } |
2491 | ||
fac6795d | 2492 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2493 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2494 | } |
2495 | ||
2496 | return 0; | |
2497 | } | |
2498 | ||
cd80958d | 2499 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2500 | struct lttng_calibrate *calibrate) |
2501 | { | |
b812e5ca PP |
2502 | /* |
2503 | * This command was removed in LTTng 2.9. | |
2504 | */ | |
2505 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2506 | } |
2507 | ||
5edd7e09 DG |
2508 | /* |
2509 | * Set default channel attributes. | |
441c16a7 | 2510 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2511 | */ |
2512 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2513 | struct lttng_channel_attr *attr) | |
2514 | { | |
294851b0 | 2515 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2516 | |
5edd7e09 DG |
2517 | /* Safety check */ |
2518 | if (attr == NULL || domain == NULL) { | |
2519 | return; | |
2520 | } | |
2521 | ||
294851b0 | 2522 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2523 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2524 | ||
0a9c6494 DG |
2525 | /* Same for all domains. */ |
2526 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2527 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2528 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2529 | ||
5edd7e09 DG |
2530 | switch (domain->type) { |
2531 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2532 | attr->switch_timer_interval = |
2533 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2534 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2535 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2536 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2537 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2538 | if (extended) { |
2539 | extended->monitor_timer_interval = | |
2540 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2541 | extended->blocking_timeout = |
2542 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2543 | } |
5edd7e09 DG |
2544 | break; |
2545 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2546 | switch (domain->buf_type) { |
2547 | case LTTNG_BUFFER_PER_UID: | |
2548 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2549 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2550 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2551 | attr->switch_timer_interval = |
2552 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2553 | attr->read_timer_interval = | |
2554 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2555 | if (extended) { |
2556 | extended->monitor_timer_interval = | |
2557 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2558 | extended->blocking_timeout = |
2559 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2560 | } |
0a9c6494 DG |
2561 | break; |
2562 | case LTTNG_BUFFER_PER_PID: | |
2563 | default: | |
2564 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2565 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2566 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2567 | attr->switch_timer_interval = |
2568 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2569 | attr->read_timer_interval = | |
2570 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2571 | if (extended) { |
2572 | extended->monitor_timer_interval = | |
2573 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2574 | extended->blocking_timeout = |
2575 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2576 | } |
0a9c6494 DG |
2577 | break; |
2578 | } | |
5edd7e09 | 2579 | default: |
441c16a7 | 2580 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2581 | break; |
2582 | } | |
cf0bcb51 JG |
2583 | |
2584 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2585 | } |
2586 | ||
5ba3702f JG |
2587 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2588 | uint64_t *discarded_events) | |
2589 | { | |
2590 | int ret = 0; | |
cf0bcb51 | 2591 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2592 | |
2593 | if (!channel || !discarded_events) { | |
2594 | ret = -LTTNG_ERR_INVALID; | |
2595 | goto end; | |
2596 | } | |
2597 | ||
2598 | chan_ext = channel->attr.extended.ptr; | |
2599 | if (!chan_ext) { | |
2600 | /* | |
2601 | * This can happen since the lttng_channel structure is | |
2602 | * used for other tasks where this pointer is never set. | |
2603 | */ | |
2604 | *discarded_events = 0; | |
2605 | goto end; | |
2606 | } | |
2607 | ||
2608 | *discarded_events = chan_ext->discarded_events; | |
2609 | end: | |
2610 | return ret; | |
2611 | } | |
2612 | ||
2613 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2614 | uint64_t *lost_packets) | |
2615 | { | |
2616 | int ret = 0; | |
cf0bcb51 | 2617 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2618 | |
2619 | if (!channel || !lost_packets) { | |
2620 | ret = -LTTNG_ERR_INVALID; | |
2621 | goto end; | |
2622 | } | |
2623 | ||
2624 | chan_ext = channel->attr.extended.ptr; | |
2625 | if (!chan_ext) { | |
2626 | /* | |
2627 | * This can happen since the lttng_channel structure is | |
2628 | * used for other tasks where this pointer is never set. | |
2629 | */ | |
2630 | *lost_packets = 0; | |
2631 | goto end; | |
2632 | } | |
2633 | ||
2634 | *lost_packets = chan_ext->lost_packets; | |
2635 | end: | |
2636 | return ret; | |
2637 | } | |
2638 | ||
cf0bcb51 JG |
2639 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2640 | uint64_t *monitor_timer_interval) | |
2641 | { | |
2642 | int ret = 0; | |
2643 | ||
2644 | if (!chan || !monitor_timer_interval) { | |
2645 | ret = -LTTNG_ERR_INVALID; | |
2646 | goto end; | |
2647 | } | |
2648 | ||
2649 | if (!chan->attr.extended.ptr) { | |
2650 | ret = -LTTNG_ERR_INVALID; | |
2651 | goto end; | |
2652 | } | |
2653 | ||
2654 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2655 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2656 | end: | |
2657 | return ret; | |
2658 | } | |
2659 | ||
2660 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2661 | uint64_t monitor_timer_interval) | |
2662 | { | |
2663 | int ret = 0; | |
2664 | ||
2665 | if (!chan || !chan->attr.extended.ptr) { | |
2666 | ret = -LTTNG_ERR_INVALID; | |
2667 | goto end; | |
2668 | } | |
2669 | ||
2670 | ((struct lttng_channel_extended *) | |
2671 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2672 | monitor_timer_interval; | |
2673 | end: | |
2674 | return ret; | |
2675 | } | |
2676 | ||
491d1539 MD |
2677 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2678 | int64_t *blocking_timeout) | |
2679 | { | |
2680 | int ret = 0; | |
2681 | ||
2682 | if (!chan || !blocking_timeout) { | |
2683 | ret = -LTTNG_ERR_INVALID; | |
2684 | goto end; | |
2685 | } | |
2686 | ||
2687 | if (!chan->attr.extended.ptr) { | |
2688 | ret = -LTTNG_ERR_INVALID; | |
2689 | goto end; | |
2690 | } | |
2691 | ||
2692 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2693 | chan->attr.extended.ptr)->blocking_timeout; | |
2694 | end: | |
2695 | return ret; | |
2696 | } | |
2697 | ||
2698 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2699 | int64_t blocking_timeout) | |
2700 | { | |
2701 | int ret = 0; | |
2702 | int64_t msec_timeout; | |
2703 | ||
2704 | if (!chan || !chan->attr.extended.ptr) { | |
2705 | ret = -LTTNG_ERR_INVALID; | |
2706 | goto end; | |
2707 | } | |
2708 | ||
2709 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2710 | ret = -LTTNG_ERR_INVALID; | |
2711 | goto end; | |
2712 | } | |
2713 | ||
2714 | /* | |
2715 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2716 | * us to accept a narrower range of values (msecs expressed as a signed | |
2717 | * 32-bit integer). | |
2718 | */ | |
2719 | msec_timeout = blocking_timeout / 1000; | |
2720 | if (msec_timeout != (int32_t) msec_timeout) { | |
2721 | ret = -LTTNG_ERR_INVALID; | |
2722 | goto end; | |
2723 | } | |
2724 | ||
2725 | ((struct lttng_channel_extended *) | |
2726 | chan->attr.extended.ptr)->blocking_timeout = | |
2727 | blocking_timeout; | |
2728 | end: | |
2729 | return ret; | |
2730 | } | |
2731 | ||
fac6795d | 2732 | /* |
2269e89e | 2733 | * Check if session daemon is alive. |
fac6795d | 2734 | * |
2269e89e | 2735 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2736 | * On error returns a negative value. |
fac6795d | 2737 | */ |
947308c4 | 2738 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2739 | { |
2740 | int ret; | |
2741 | ||
2742 | ret = set_session_daemon_path(); | |
2743 | if (ret < 0) { | |
9ae110e2 | 2744 | /* Error. */ |
fac6795d DG |
2745 | return ret; |
2746 | } | |
2747 | ||
9d035200 | 2748 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2749 | /* |
9ae110e2 JG |
2750 | * No socket path set. Weird error which means the constructor |
2751 | * was not called. | |
2f70b271 DG |
2752 | */ |
2753 | assert(0); | |
fac6795d DG |
2754 | } |
2755 | ||
2269e89e | 2756 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2757 | if (ret < 0) { |
9ae110e2 | 2758 | /* Not alive. */ |
7d8234d9 MD |
2759 | return 0; |
2760 | } | |
7d8234d9 | 2761 | |
9ae110e2 | 2762 | /* Is alive. */ |
947308c4 | 2763 | return 1; |
fac6795d DG |
2764 | } |
2765 | ||
00e2e675 | 2766 | /* |
a4b92340 | 2767 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2768 | * |
2769 | * Return 0 on success, else a negative value. | |
2770 | */ | |
a4b92340 DG |
2771 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2772 | const char *control_url, const char *data_url) | |
00e2e675 | 2773 | { |
3dd05a85 | 2774 | int ret; |
a4b92340 | 2775 | ssize_t size; |
00e2e675 | 2776 | struct lttcomm_session_msg lsm; |
a4b92340 | 2777 | struct lttng_uri *uris = NULL; |
00e2e675 | 2778 | |
a4b92340 | 2779 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2780 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2781 | } |
2782 | ||
a4b92340 DG |
2783 | memset(&lsm, 0, sizeof(lsm)); |
2784 | ||
00e2e675 DG |
2785 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2786 | ||
cac3069d | 2787 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2788 | sizeof(lsm.session.name)); |
cac3069d | 2789 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); |
00e2e675 | 2790 | |
bc894455 | 2791 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2792 | if (size < 0) { |
2f70b271 | 2793 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2794 | } |
2795 | ||
2796 | lsm.u.uri.size = size; | |
00e2e675 | 2797 | |
795a978d | 2798 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2799 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2800 | |
2801 | free(uris); | |
2802 | return ret; | |
00e2e675 DG |
2803 | } |
2804 | ||
2805 | /* | |
9c6bda17 | 2806 | * [OBSOLETE] |
00e2e675 DG |
2807 | */ |
2808 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2809 | { | |
785d2d0d | 2810 | return -ENOSYS; |
00e2e675 DG |
2811 | } |
2812 | ||
2813 | /* | |
9c6bda17 | 2814 | * [OBSOLETE] |
00e2e675 DG |
2815 | */ |
2816 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2817 | { | |
785d2d0d | 2818 | return -ENOSYS; |
00e2e675 DG |
2819 | } |
2820 | ||
07424f16 | 2821 | /* |
5feee503 | 2822 | * [OBSOLETE] |
07424f16 DG |
2823 | */ |
2824 | int _lttng_create_session_ext(const char *name, const char *url, | |
2825 | const char *datetime) | |
2826 | { | |
5feee503 | 2827 | return -ENOSYS; |
07424f16 DG |
2828 | } |
2829 | ||
806e2684 DG |
2830 | /* |
2831 | * For a given session name, this call checks if the data is ready to be read | |
2832 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2833 | * any readers. | |
2834 | */ | |
6d805429 | 2835 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2836 | { |
2837 | int ret; | |
2838 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2839 | uint8_t *pending = NULL; |
806e2684 DG |
2840 | |
2841 | if (session_name == NULL) { | |
2842 | return -LTTNG_ERR_INVALID; | |
2843 | } | |
2844 | ||
53efb85a | 2845 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2846 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2847 | |
cac3069d DG |
2848 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2849 | sizeof(lsm.session.name)); | |
806e2684 | 2850 | |
f6151c55 JG |
2851 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2852 | if (ret < 0) { | |
2853 | goto end; | |
2854 | } else if (ret != 1) { | |
2855 | /* Unexpected payload size */ | |
2856 | ret = -LTTNG_ERR_INVALID; | |
2857 | goto end; | |
806e2684 DG |
2858 | } |
2859 | ||
f6151c55 JG |
2860 | ret = (int) *pending; |
2861 | end: | |
2862 | free(pending); | |
806e2684 DG |
2863 | return ret; |
2864 | } | |
2865 | ||
a5dfbb9d MD |
2866 | /* |
2867 | * List PIDs in the tracker. | |
2868 | * | |
1b18ce93 JG |
2869 | * enabled is set to whether the PID tracker is enabled. |
2870 | * pids is set to an allocated array of PIDs currently tracked. On | |
2871 | * success, pids must be freed by the caller. | |
2872 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2873 | * |
2874 | * Returns 0 on success, else a negative LTTng error code. | |
2875 | */ | |
2876 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2877 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2878 | { | |
ebbf5ab7 JR |
2879 | int ret; |
2880 | int enabled = 1; | |
a5dfbb9d MD |
2881 | struct lttcomm_session_msg lsm; |
2882 | size_t nr_pids; | |
ff75c11e | 2883 | int32_t *pids = NULL; |
a5dfbb9d MD |
2884 | |
2885 | if (handle == NULL) { | |
2886 | return -LTTNG_ERR_INVALID; | |
2887 | } | |
2888 | ||
2889 | memset(&lsm, 0, sizeof(lsm)); | |
2890 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2891 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2892 | sizeof(lsm.session.name)); | |
2893 | lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain); | |
2894 | ||
2895 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2896 | if (ret < 0) { | |
2897 | return ret; | |
2898 | } | |
2899 | nr_pids = ret / sizeof(int32_t); | |
de8218d4 JG |
2900 | if (nr_pids > 0 && !pids) { |
2901 | return -LTTNG_ERR_UNK; | |
2902 | } | |
a5dfbb9d MD |
2903 | if (nr_pids == 1 && pids[0] == -1) { |
2904 | free(pids); | |
2905 | pids = NULL; | |
2906 | enabled = 0; | |
2907 | nr_pids = 0; | |
2908 | } | |
2909 | *_enabled = enabled; | |
2910 | *_pids = pids; | |
2911 | *_nr_pids = nr_pids; | |
2912 | return 0; | |
2913 | } | |
2914 | ||
93ec662e JD |
2915 | /* |
2916 | * Regenerate the metadata for a session. | |
2917 | * Return 0 on success, a negative error code on error. | |
2918 | */ | |
eded6438 | 2919 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2920 | { |
2921 | int ret; | |
2922 | struct lttcomm_session_msg lsm; | |
2923 | ||
2924 | if (!session_name) { | |
2925 | ret = -LTTNG_ERR_INVALID; | |
2926 | goto end; | |
2927 | } | |
2928 | ||
2929 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2930 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2931 | |
2932 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2933 | sizeof(lsm.session.name)); | |
2934 | ||
2935 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2936 | if (ret < 0) { | |
2937 | goto end; | |
2938 | } | |
2939 | ||
2940 | ret = 0; | |
2941 | end: | |
2942 | return ret; | |
2943 | } | |
2944 | ||
eded6438 JD |
2945 | /* |
2946 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2947 | */ | |
2948 | int lttng_metadata_regenerate(const char *session_name) | |
2949 | { | |
2950 | return lttng_regenerate_metadata(session_name); | |
2951 | } | |
2952 | ||
c2561365 JD |
2953 | /* |
2954 | * Regenerate the statedump of a session. | |
2955 | * Return 0 on success, a negative error code on error. | |
2956 | */ | |
2957 | int lttng_regenerate_statedump(const char *session_name) | |
2958 | { | |
2959 | int ret; | |
2960 | struct lttcomm_session_msg lsm; | |
2961 | ||
2962 | if (!session_name) { | |
2963 | ret = -LTTNG_ERR_INVALID; | |
2964 | goto end; | |
2965 | } | |
2966 | ||
2967 | memset(&lsm, 0, sizeof(lsm)); | |
2968 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2969 | ||
2970 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2971 | sizeof(lsm.session.name)); | |
2972 | ||
2973 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2974 | if (ret < 0) { | |
2975 | goto end; | |
2976 | } | |
2977 | ||
2978 | ret = 0; | |
2979 | end: | |
2980 | return ret; | |
2981 | } | |
2982 | ||
a58c490f JG |
2983 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2984 | { | |
2985 | int ret; | |
2986 | struct lttcomm_session_msg lsm; | |
3647288f | 2987 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2988 | |
3647288f | 2989 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
2990 | if (!trigger) { |
2991 | ret = -LTTNG_ERR_INVALID; | |
2992 | goto end; | |
2993 | } | |
2994 | ||
2995 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 2996 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
2997 | goto end; |
2998 | } | |
2999 | ||
3647288f JG |
3000 | ret = lttng_trigger_serialize(trigger, &buffer); |
3001 | if (ret < 0) { | |
a58c490f JG |
3002 | ret = -LTTNG_ERR_UNK; |
3003 | goto end; | |
3004 | } | |
3005 | ||
a58c490f JG |
3006 | memset(&lsm, 0, sizeof(lsm)); |
3007 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
3008 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3009 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3010 | buffer.size, NULL); | |
a58c490f | 3011 | end: |
3647288f | 3012 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3013 | return ret; |
3014 | } | |
3015 | ||
3016 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
3017 | { | |
3018 | int ret; | |
3019 | struct lttcomm_session_msg lsm; | |
3647288f | 3020 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3021 | |
3647288f | 3022 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3023 | if (!trigger) { |
3024 | ret = -LTTNG_ERR_INVALID; | |
3025 | goto end; | |
3026 | } | |
3027 | ||
3028 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 3029 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3030 | goto end; |
3031 | } | |
3032 | ||
3647288f JG |
3033 | ret = lttng_trigger_serialize(trigger, &buffer); |
3034 | if (ret < 0) { | |
a58c490f JG |
3035 | ret = -LTTNG_ERR_UNK; |
3036 | goto end; | |
3037 | } | |
3038 | ||
a58c490f JG |
3039 | memset(&lsm, 0, sizeof(lsm)); |
3040 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
3041 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3042 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3043 | buffer.size, NULL); | |
a58c490f | 3044 | end: |
3647288f | 3045 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3046 | return ret; |
3047 | } | |
3048 | ||
fac6795d | 3049 | /* |
9ae110e2 | 3050 | * lib constructor. |
fac6795d | 3051 | */ |
b2b89e8a | 3052 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3053 | { |
3054 | /* Set default session group */ | |
bbccc3d2 | 3055 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3056 | } |
49cca668 DG |
3057 | |
3058 | /* | |
9ae110e2 | 3059 | * lib destructor. |
49cca668 | 3060 | */ |
b2b89e8a | 3061 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3062 | { |
3063 | free(tracing_group); | |
3064 | } |