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 | ||
67040e31 JG |
70 | #define COPY_DOMAIN_PACKED(dst, src) \ |
71 | do { \ | |
72 | struct lttng_domain _tmp_domain; \ | |
73 | \ | |
74 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
75 | dst = _tmp_domain; \ | |
76 | } while (0) | |
53a80697 | 77 | |
fac6795d | 78 | /* Socket to session daemon for communication */ |
823a1989 | 79 | static int sessiond_socket = -1; |
fac6795d DG |
80 | static char sessiond_sock_path[PATH_MAX]; |
81 | ||
fac6795d DG |
82 | /* Variables */ |
83 | static char *tracing_group; | |
84 | static int connected; | |
85 | ||
97e19046 DG |
86 | /* Global */ |
87 | ||
88 | /* | |
89 | * Those two variables are used by error.h to silent or control the verbosity of | |
90 | * error message. They are global to the library so application linking with it | |
91 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
92 | */ |
93 | int lttng_opt_quiet; | |
94 | int lttng_opt_verbose; | |
c7e35b03 | 95 | int lttng_opt_mi; |
97e19046 | 96 | |
99497cd0 MD |
97 | /* |
98 | * Copy string from src to dst and enforce null terminated byte. | |
99 | */ | |
cac3069d DG |
100 | LTTNG_HIDDEN |
101 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 102 | { |
e7d6716d | 103 | if (src && dst) { |
99497cd0 MD |
104 | strncpy(dst, src, len); |
105 | /* Enforce the NULL terminated byte */ | |
106 | dst[len - 1] = '\0'; | |
cd80958d DG |
107 | } else if (dst) { |
108 | dst[0] = '\0'; | |
99497cd0 MD |
109 | } |
110 | } | |
111 | ||
fac6795d | 112 | /* |
cd80958d | 113 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 114 | * |
cd80958d DG |
115 | * If domain is unknown, default domain will be the kernel. |
116 | */ | |
cac3069d DG |
117 | LTTNG_HIDDEN |
118 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
119 | struct lttng_domain *src) | |
cd80958d DG |
120 | { |
121 | if (src && dst) { | |
122 | switch (src->type) { | |
00e2e675 DG |
123 | case LTTNG_DOMAIN_KERNEL: |
124 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 125 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 126 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 127 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
128 | memcpy(dst, src, sizeof(struct lttng_domain)); |
129 | break; | |
130 | default: | |
131 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 132 | break; |
cd80958d DG |
133 | } |
134 | } | |
135 | } | |
136 | ||
137 | /* | |
138 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 139 | * |
1c8d13c8 TD |
140 | * On success, returns the number of bytes sent (>=0) |
141 | * On error, returns -1 | |
fac6795d | 142 | */ |
cd80958d | 143 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
144 | { |
145 | int ret; | |
146 | ||
147 | if (!connected) { | |
2f70b271 | 148 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 149 | goto end; |
fac6795d DG |
150 | } |
151 | ||
a4b92340 DG |
152 | DBG("LSM cmd type : %d", lsm->cmd_type); |
153 | ||
be040666 | 154 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 155 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
156 | if (ret < 0) { |
157 | ret = -LTTNG_ERR_FATAL; | |
158 | } | |
e065084a DG |
159 | |
160 | end: | |
161 | return ret; | |
162 | } | |
163 | ||
53a80697 MD |
164 | /* |
165 | * Send var len data to the session daemon. | |
166 | * | |
167 | * On success, returns the number of bytes sent (>=0) | |
168 | * On error, returns -1 | |
169 | */ | |
c2d69327 | 170 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
171 | { |
172 | int ret; | |
173 | ||
174 | if (!connected) { | |
2f70b271 | 175 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
176 | goto end; |
177 | } | |
a4b92340 | 178 | |
53a80697 MD |
179 | if (!data || !len) { |
180 | ret = 0; | |
181 | goto end; | |
182 | } | |
183 | ||
184 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
185 | if (ret < 0) { |
186 | ret = -LTTNG_ERR_FATAL; | |
187 | } | |
53a80697 MD |
188 | |
189 | end: | |
190 | return ret; | |
191 | } | |
192 | ||
a04d53fc FD |
193 | /* |
194 | * Send file descriptors to the session daemon. | |
195 | * | |
196 | * On success, returns the number of bytes sent (>=0) | |
197 | * On error, returns -1 | |
198 | */ | |
199 | static int send_session_fds(const int *fds, size_t nb_fd) | |
200 | { | |
201 | int ret; | |
202 | ||
203 | if (!connected) { | |
204 | ret = -LTTNG_ERR_NO_SESSIOND; | |
205 | goto end; | |
206 | } | |
207 | ||
208 | if (!fds || !nb_fd) { | |
209 | ret = 0; | |
210 | goto end; | |
211 | } | |
212 | ||
213 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
214 | if (ret < 0) { | |
215 | ret = -LTTNG_ERR_FATAL; | |
216 | } | |
217 | ||
218 | end: | |
219 | return ret; | |
220 | } | |
221 | ||
e065084a | 222 | /* |
cd80958d | 223 | * Receive data from the sessiond socket. |
e065084a | 224 | * |
1c8d13c8 TD |
225 | * On success, returns the number of bytes received (>=0) |
226 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 227 | */ |
ca95a216 | 228 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
229 | { |
230 | int ret; | |
231 | ||
232 | if (!connected) { | |
2f70b271 | 233 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 234 | goto end; |
fac6795d DG |
235 | } |
236 | ||
ca95a216 | 237 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
238 | if (ret < 0) { |
239 | ret = -LTTNG_ERR_FATAL; | |
240 | } | |
fac6795d | 241 | |
e065084a | 242 | end: |
fac6795d DG |
243 | return ret; |
244 | } | |
245 | ||
246 | /* | |
9ae110e2 | 247 | * Check if we are in the specified group. |
65beb5ff | 248 | * |
9ae110e2 | 249 | * If yes return 1, else return -1. |
947308c4 | 250 | */ |
6c71277b MD |
251 | LTTNG_HIDDEN |
252 | int lttng_check_tracing_group(void) | |
947308c4 | 253 | { |
6710e5aa | 254 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
255 | int grp_list_size, grp_id, i; |
256 | int ret = -1; | |
6c71277b | 257 | const char *grp_name = tracing_group; |
947308c4 DG |
258 | |
259 | /* Get GID of group 'tracing' */ | |
6710e5aa | 260 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 261 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
262 | goto end; |
263 | } | |
264 | ||
265 | /* Get number of supplementary group IDs */ | |
266 | grp_list_size = getgroups(0, NULL); | |
267 | if (grp_list_size < 0) { | |
6f04ed72 | 268 | PERROR("getgroups"); |
947308c4 DG |
269 | goto end; |
270 | } | |
271 | ||
272 | /* Alloc group list of the right size */ | |
3f451dc0 | 273 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 274 | if (!grp_list) { |
6f04ed72 | 275 | PERROR("malloc"); |
00795392 MD |
276 | goto end; |
277 | } | |
947308c4 | 278 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 279 | if (grp_id < 0) { |
6f04ed72 | 280 | PERROR("getgroups"); |
947308c4 DG |
281 | goto free_list; |
282 | } | |
283 | ||
284 | for (i = 0; i < grp_list_size; i++) { | |
6710e5aa | 285 | if (grp_list[i] == tracing_gid) { |
2269e89e | 286 | ret = 1; |
947308c4 DG |
287 | break; |
288 | } | |
289 | } | |
290 | ||
291 | free_list: | |
292 | free(grp_list); | |
293 | ||
294 | end: | |
295 | return ret; | |
296 | } | |
297 | ||
e3091d6a FD |
298 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
299 | { | |
300 | int ret; | |
301 | long num_cpu; | |
302 | size_t best_mem_info; | |
303 | size_t num_bytes_requested_total; | |
304 | ||
305 | /* | |
306 | * Get the number of CPU currently online to compute the amount of | |
307 | * memory needed to create a buffer for every CPU. | |
308 | */ | |
309 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
310 | if (num_cpu == -1) { | |
311 | goto error; | |
312 | } | |
313 | ||
314 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
315 | ||
316 | /* | |
317 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
318 | * reliable estimate we can get but it is only exposed by the kernel | |
319 | * since 3.14. (See Linux kernel commit: | |
320 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
321 | */ | |
322 | ret = utils_get_memory_available(&best_mem_info); | |
323 | if (ret >= 0) { | |
324 | goto success; | |
325 | } | |
326 | ||
327 | /* | |
328 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
329 | * is a sanity check for obvious user error. | |
330 | */ | |
331 | ret = utils_get_memory_total(&best_mem_info); | |
332 | if (ret >= 0) { | |
333 | goto success; | |
334 | } | |
335 | ||
336 | error: | |
337 | return -1; | |
338 | success: | |
339 | return best_mem_info >= num_bytes_requested_total; | |
340 | } | |
341 | ||
947308c4 | 342 | /* |
2269e89e DG |
343 | * Try connect to session daemon with sock_path. |
344 | * | |
345 | * Return 0 on success, else -1 | |
346 | */ | |
347 | static int try_connect_sessiond(const char *sock_path) | |
348 | { | |
349 | int ret; | |
350 | ||
351 | /* If socket exist, we check if the daemon listens for connect. */ | |
352 | ret = access(sock_path, F_OK); | |
353 | if (ret < 0) { | |
354 | /* Not alive */ | |
2f70b271 | 355 | goto error; |
2269e89e DG |
356 | } |
357 | ||
358 | ret = lttcomm_connect_unix_sock(sock_path); | |
359 | if (ret < 0) { | |
9ae110e2 | 360 | /* Not alive. */ |
2f70b271 | 361 | goto error; |
2269e89e DG |
362 | } |
363 | ||
364 | ret = lttcomm_close_unix_sock(ret); | |
365 | if (ret < 0) { | |
6f04ed72 | 366 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
367 | } |
368 | ||
369 | return 0; | |
2f70b271 DG |
370 | |
371 | error: | |
372 | return -1; | |
2269e89e DG |
373 | } |
374 | ||
375 | /* | |
2f70b271 DG |
376 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
377 | * variable. | |
378 | * | |
379 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
380 | * is somehow too long or ENOMEM). | |
947308c4 DG |
381 | */ |
382 | static int set_session_daemon_path(void) | |
383 | { | |
9ae110e2 | 384 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
385 | uid_t uid; |
386 | ||
387 | uid = getuid(); | |
947308c4 | 388 | |
2269e89e DG |
389 | if (uid != 0) { |
390 | /* Are we in the tracing group ? */ | |
6c71277b | 391 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
392 | } |
393 | ||
08a9c49f | 394 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
395 | lttng_ctl_copy_string(sessiond_sock_path, |
396 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 397 | } |
2269e89e | 398 | |
08a9c49f | 399 | if (uid != 0) { |
c617c0c6 MD |
400 | int ret; |
401 | ||
08a9c49f | 402 | if (in_tgroup) { |
9ae110e2 | 403 | /* Tracing group. */ |
08a9c49f TD |
404 | ret = try_connect_sessiond(sessiond_sock_path); |
405 | if (ret >= 0) { | |
406 | goto end; | |
2269e89e | 407 | } |
08a9c49f | 408 | /* Global session daemon not available... */ |
2269e89e | 409 | } |
08a9c49f TD |
410 | /* ...or not in tracing group (and not root), default */ |
411 | ||
412 | /* | |
9ae110e2 JG |
413 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
414 | * is too small; | |
415 | * With GNU C >= 2.1, snprintf returns the required size | |
416 | * (excluding closing null) | |
08a9c49f TD |
417 | */ |
418 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 419 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 420 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 421 | goto error; |
947308c4 | 422 | } |
947308c4 | 423 | } |
08a9c49f | 424 | end: |
947308c4 | 425 | return 0; |
2f70b271 DG |
426 | |
427 | error: | |
428 | return -1; | |
947308c4 DG |
429 | } |
430 | ||
65beb5ff | 431 | /* |
9ae110e2 | 432 | * Connect to the LTTng session daemon. |
65beb5ff | 433 | * |
823a1989 | 434 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 435 | */ |
823a1989 | 436 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
437 | { |
438 | int ret; | |
439 | ||
440 | ret = set_session_daemon_path(); | |
441 | if (ret < 0) { | |
2f70b271 | 442 | goto error; |
65beb5ff DG |
443 | } |
444 | ||
9ae110e2 | 445 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
446 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
447 | if (ret < 0) { | |
2f70b271 | 448 | goto error; |
65beb5ff DG |
449 | } |
450 | ||
823a1989 | 451 | return ret; |
2f70b271 DG |
452 | |
453 | error: | |
454 | return -1; | |
65beb5ff DG |
455 | } |
456 | ||
823a1989 JG |
457 | static void reset_global_sessiond_connection_state(void) |
458 | { | |
459 | sessiond_socket = -1; | |
460 | connected = 0; | |
461 | } | |
462 | ||
65beb5ff | 463 | /* |
1c8d13c8 | 464 | * Clean disconnect from the session daemon. |
9ae110e2 | 465 | * |
1c8d13c8 | 466 | * On success, return 0. On error, return -1. |
65beb5ff DG |
467 | */ |
468 | static int disconnect_sessiond(void) | |
469 | { | |
470 | int ret = 0; | |
471 | ||
472 | if (connected) { | |
473 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
823a1989 | 474 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
475 | } |
476 | ||
477 | return ret; | |
478 | } | |
479 | ||
795a978d PP |
480 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
481 | size_t *user_len) | |
482 | { | |
483 | int ret = 0; | |
484 | void *buf = NULL; | |
485 | ||
486 | if (len) { | |
487 | if (!user_len) { | |
488 | ret = -LTTNG_ERR_INVALID; | |
489 | goto end; | |
490 | } | |
491 | ||
492 | buf = zmalloc(len); | |
493 | if (!buf) { | |
494 | ret = -ENOMEM; | |
495 | goto end; | |
496 | } | |
497 | ||
498 | ret = recv_data_sessiond(buf, len); | |
499 | if (ret < 0) { | |
500 | goto end; | |
501 | } | |
502 | ||
503 | if (!user_buf) { | |
504 | ret = -LTTNG_ERR_INVALID; | |
505 | goto end; | |
506 | } | |
507 | ||
508 | /* Move ownership of command header buffer to user. */ | |
509 | *user_buf = buf; | |
510 | buf = NULL; | |
511 | *user_len = len; | |
512 | } else { | |
513 | /* No command header. */ | |
514 | if (user_len) { | |
515 | *user_len = 0; | |
516 | } | |
517 | ||
518 | if (user_buf) { | |
519 | *user_buf = NULL; | |
520 | } | |
521 | } | |
522 | ||
523 | end: | |
524 | free(buf); | |
525 | return ret; | |
526 | } | |
527 | ||
35a6fdb7 | 528 | /* |
cd80958d | 529 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
530 | * Takes extra var. len. data and file descriptors as input to send to the |
531 | * session daemon. | |
65beb5ff | 532 | * |
af87c45a | 533 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 534 | */ |
cac3069d | 535 | LTTNG_HIDDEN |
a04d53fc FD |
536 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
537 | const int *fds, size_t nb_fd, const void *vardata, | |
538 | size_t vardata_len, void **user_payload_buf, | |
539 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
540 | { |
541 | int ret; | |
795a978d | 542 | size_t payload_len; |
cd80958d | 543 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
544 | |
545 | ret = connect_sessiond(); | |
546 | if (ret < 0) { | |
2f70b271 | 547 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 548 | goto end; |
823a1989 JG |
549 | } else { |
550 | sessiond_socket = ret; | |
551 | connected = 1; | |
65beb5ff DG |
552 | } |
553 | ||
65beb5ff | 554 | /* Send command to session daemon */ |
cd80958d | 555 | ret = send_session_msg(lsm); |
65beb5ff | 556 | if (ret < 0) { |
2f70b271 | 557 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
558 | goto end; |
559 | } | |
53a80697 | 560 | /* Send var len data */ |
795a978d | 561 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 562 | if (ret < 0) { |
2f70b271 | 563 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
564 | goto end; |
565 | } | |
65beb5ff | 566 | |
a04d53fc FD |
567 | /* Send fds */ |
568 | ret = send_session_fds(fds, nb_fd); | |
569 | if (ret < 0) { | |
570 | /* Ret value is a valid lttng error code. */ | |
571 | goto end; | |
572 | } | |
573 | ||
65beb5ff DG |
574 | /* Get header from data transmission */ |
575 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
576 | if (ret < 0) { | |
2f70b271 | 577 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
578 | goto end; |
579 | } | |
580 | ||
581 | /* Check error code if OK */ | |
f73fabfd | 582 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
583 | ret = -llm.ret_code; |
584 | goto end; | |
585 | } | |
586 | ||
795a978d PP |
587 | /* Get command header from data transmission */ |
588 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
589 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 590 | if (ret < 0) { |
65beb5ff DG |
591 | goto end; |
592 | } | |
593 | ||
795a978d PP |
594 | /* Get payload from data transmission */ |
595 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
596 | &payload_len); | |
597 | if (ret < 0) { | |
83009e5e DG |
598 | goto end; |
599 | } | |
600 | ||
795a978d | 601 | ret = llm.data_size; |
65beb5ff DG |
602 | |
603 | end: | |
604 | disconnect_sessiond(); | |
605 | return ret; | |
606 | } | |
607 | ||
9f19cc17 | 608 | /* |
cd80958d | 609 | * Create lttng handle and return pointer. |
9ae110e2 | 610 | * |
1c8d13c8 | 611 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 612 | */ |
cd80958d DG |
613 | struct lttng_handle *lttng_create_handle(const char *session_name, |
614 | struct lttng_domain *domain) | |
9f19cc17 | 615 | { |
2f70b271 DG |
616 | struct lttng_handle *handle = NULL; |
617 | ||
3f451dc0 | 618 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 619 | if (handle == NULL) { |
2f70b271 | 620 | PERROR("malloc handle"); |
cd80958d DG |
621 | goto end; |
622 | } | |
623 | ||
624 | /* Copy session name */ | |
cac3069d | 625 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
626 | sizeof(handle->session_name)); |
627 | ||
95681498 JG |
628 | /* Copy lttng domain or leave initialized to 0. */ |
629 | if (domain) { | |
630 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
631 | } | |
cd80958d DG |
632 | |
633 | end: | |
634 | return handle; | |
635 | } | |
636 | ||
637 | /* | |
638 | * Destroy handle by free(3) the pointer. | |
639 | */ | |
640 | void lttng_destroy_handle(struct lttng_handle *handle) | |
641 | { | |
0e428499 | 642 | free(handle); |
eb354453 DG |
643 | } |
644 | ||
d9800920 DG |
645 | /* |
646 | * Register an outside consumer. | |
9ae110e2 | 647 | * |
1c8d13c8 | 648 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
649 | */ |
650 | int lttng_register_consumer(struct lttng_handle *handle, | |
651 | const char *socket_path) | |
652 | { | |
653 | struct lttcomm_session_msg lsm; | |
654 | ||
2f70b271 DG |
655 | if (handle == NULL || socket_path == NULL) { |
656 | return -LTTNG_ERR_INVALID; | |
657 | } | |
658 | ||
53efb85a | 659 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 660 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 661 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 662 | sizeof(lsm.session.name)); |
67040e31 | 663 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 664 | |
9ae110e2 JG |
665 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
666 | sizeof(lsm.u.reg.path)); | |
d9800920 | 667 | |
cac3069d | 668 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
669 | } |
670 | ||
1df4dedd | 671 | /* |
9ae110e2 JG |
672 | * Start tracing for all traces of the session. |
673 | * | |
674 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 675 | */ |
6a4f824d | 676 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 677 | { |
cd80958d DG |
678 | struct lttcomm_session_msg lsm; |
679 | ||
6a4f824d | 680 | if (session_name == NULL) { |
2f70b271 | 681 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
682 | } |
683 | ||
53efb85a | 684 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 685 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 686 | |
cac3069d DG |
687 | lttng_ctl_copy_string(lsm.session.name, session_name, |
688 | sizeof(lsm.session.name)); | |
cd80958d | 689 | |
cac3069d | 690 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 691 | } |
1df4dedd DG |
692 | |
693 | /* | |
38ee087f | 694 | * Stop tracing for all traces of the session. |
f3ed775e | 695 | */ |
38ee087f | 696 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 697 | { |
38ee087f | 698 | int ret, data_ret; |
cd80958d DG |
699 | struct lttcomm_session_msg lsm; |
700 | ||
6a4f824d | 701 | if (session_name == NULL) { |
2f70b271 | 702 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
703 | } |
704 | ||
53efb85a | 705 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 706 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 707 | |
cac3069d DG |
708 | lttng_ctl_copy_string(lsm.session.name, session_name, |
709 | sizeof(lsm.session.name)); | |
cd80958d | 710 | |
cac3069d | 711 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
712 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
713 | goto error; | |
714 | } | |
715 | ||
716 | if (!wait) { | |
717 | goto end; | |
718 | } | |
719 | ||
38ee087f DG |
720 | /* Check for data availability */ |
721 | do { | |
6d805429 | 722 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
723 | if (data_ret < 0) { |
724 | /* Return the data available call error. */ | |
725 | ret = data_ret; | |
726 | goto error; | |
727 | } | |
728 | ||
729 | /* | |
9ae110e2 JG |
730 | * Data sleep time before retrying (in usec). Don't sleep if the |
731 | * call returned value indicates availability. | |
38ee087f | 732 | */ |
6d805429 | 733 | if (data_ret) { |
ea0f4f56 | 734 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 735 | } |
6d805429 | 736 | } while (data_ret != 0); |
38ee087f | 737 | |
38ee087f DG |
738 | end: |
739 | error: | |
740 | return ret; | |
741 | } | |
742 | ||
743 | /* | |
744 | * Stop tracing and wait for data availability. | |
745 | */ | |
746 | int lttng_stop_tracing(const char *session_name) | |
747 | { | |
748 | return _lttng_stop_tracing(session_name, 1); | |
749 | } | |
750 | ||
751 | /* | |
752 | * Stop tracing but _don't_ wait for data availability. | |
753 | */ | |
754 | int lttng_stop_tracing_no_wait(const char *session_name) | |
755 | { | |
756 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
757 | } |
758 | ||
759 | /* | |
601d5acf DG |
760 | * Add context to a channel. |
761 | * | |
762 | * If the given channel is NULL, add the contexts to all channels. | |
763 | * The event_name param is ignored. | |
af87c45a DG |
764 | * |
765 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 766 | */ |
cd80958d | 767 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
768 | struct lttng_event_context *ctx, const char *event_name, |
769 | const char *channel_name) | |
d65106b1 | 770 | { |
2001793c JG |
771 | int ret; |
772 | size_t len = 0; | |
773 | char *buf = NULL; | |
cd80958d DG |
774 | struct lttcomm_session_msg lsm; |
775 | ||
9ae110e2 | 776 | /* Safety check. Both are mandatory. */ |
9d697d3d | 777 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
778 | ret = -LTTNG_ERR_INVALID; |
779 | goto end; | |
cd80958d DG |
780 | } |
781 | ||
441c16a7 | 782 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
783 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
784 | ||
85076754 MD |
785 | /* If no channel name, send empty string. */ |
786 | if (channel_name == NULL) { | |
787 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
788 | sizeof(lsm.u.context.channel_name)); | |
789 | } else { | |
790 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
791 | sizeof(lsm.u.context.channel_name)); | |
792 | } | |
cd80958d | 793 | |
67040e31 | 794 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cac3069d | 795 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
796 | sizeof(lsm.session.name)); |
797 | ||
2001793c JG |
798 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
799 | size_t provider_len, ctx_len; | |
800 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
801 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
802 | ||
803 | if (!provider_name || !ctx_name) { | |
804 | ret = -LTTNG_ERR_INVALID; | |
805 | goto end; | |
806 | } | |
807 | ||
808 | provider_len = strlen(provider_name); | |
809 | if (provider_len == 0) { | |
810 | ret = -LTTNG_ERR_INVALID; | |
811 | goto end; | |
812 | } | |
813 | lsm.u.context.provider_name_len = provider_len; | |
814 | ||
815 | ctx_len = strlen(ctx_name); | |
816 | if (ctx_len == 0) { | |
817 | ret = -LTTNG_ERR_INVALID; | |
818 | goto end; | |
819 | } | |
820 | lsm.u.context.context_name_len = ctx_len; | |
821 | ||
822 | len = provider_len + ctx_len; | |
823 | buf = zmalloc(len); | |
824 | if (!buf) { | |
825 | ret = -LTTNG_ERR_NOMEM; | |
826 | goto end; | |
827 | } | |
828 | ||
829 | memcpy(buf, provider_name, provider_len); | |
830 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
831 | } | |
832 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
833 | |
834 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
835 | /* | |
836 | * Don't leak application addresses to the sessiond. | |
837 | * This is only necessary when ctx is for an app ctx otherwise | |
838 | * the values inside the union (type & config) are overwritten. | |
839 | */ | |
840 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
841 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
842 | } | |
2001793c | 843 | |
795a978d | 844 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
845 | end: |
846 | free(buf); | |
847 | return ret; | |
d65106b1 DG |
848 | } |
849 | ||
f3ed775e | 850 | /* |
9ae110e2 JG |
851 | * Enable event(s) for a channel. |
852 | * | |
853 | * If no event name is specified, all events are enabled. | |
854 | * If no channel name is specified, the default 'channel0' is used. | |
855 | * | |
856 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 857 | */ |
cd80958d | 858 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 859 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 860 | { |
f8a96544 JI |
861 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
862 | NULL, 0, NULL); | |
1df4dedd DG |
863 | } |
864 | ||
53a80697 | 865 | /* |
025faf73 | 866 | * Create or enable an event with a filter expression. |
178191b3 | 867 | * |
53a80697 MD |
868 | * Return negative error value on error. |
869 | * Return size of returned session payload data if OK. | |
870 | */ | |
025faf73 | 871 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 872 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
873 | const char *filter_expression) |
874 | { | |
f8a96544 JI |
875 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
876 | filter_expression, 0, NULL); | |
53a80697 MD |
877 | } |
878 | ||
347c5ab5 | 879 | /* |
0e115563 | 880 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
881 | * NULL if not applicable. |
882 | * | |
883 | * An event with NO loglevel and the name is * will return NULL. | |
884 | */ | |
0e115563 | 885 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
886 | { |
887 | int err; | |
0e115563 | 888 | char *agent_filter = NULL; |
347c5ab5 DG |
889 | |
890 | assert(ev); | |
891 | ||
892 | /* Don't add filter for the '*' event. */ | |
9f449915 | 893 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 894 | if (filter) { |
0e115563 | 895 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
896 | ev->name); |
897 | } else { | |
0e115563 | 898 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
899 | } |
900 | if (err < 0) { | |
901 | PERROR("asprintf"); | |
6a556f7b | 902 | goto error; |
347c5ab5 DG |
903 | } |
904 | } | |
905 | ||
906 | /* Add loglevel filtering if any for the JUL domain. */ | |
907 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
908 | char *op; | |
909 | ||
910 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
911 | op = ">="; | |
912 | } else { | |
913 | op = "=="; | |
914 | } | |
915 | ||
0e115563 | 916 | if (filter || agent_filter) { |
6a556f7b JG |
917 | char *new_filter; |
918 | ||
fb0edb23 | 919 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 920 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 921 | ev->loglevel); |
0e115563 DG |
922 | if (agent_filter) { |
923 | free(agent_filter); | |
6a556f7b | 924 | } |
0e115563 | 925 | agent_filter = new_filter; |
347c5ab5 | 926 | } else { |
0e115563 | 927 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
928 | ev->loglevel); |
929 | } | |
930 | if (err < 0) { | |
931 | PERROR("asprintf"); | |
6a556f7b | 932 | goto error; |
347c5ab5 DG |
933 | } |
934 | } | |
935 | ||
0e115563 | 936 | return agent_filter; |
6a556f7b | 937 | error: |
0e115563 | 938 | free(agent_filter); |
6a556f7b | 939 | return NULL; |
347c5ab5 DG |
940 | } |
941 | ||
137b9942 | 942 | /* |
ec166985 | 943 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
944 | * newly allocated parser context in ctxp and populate the lsm object with the |
945 | * expression len. | |
946 | * | |
947 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
948 | */ | |
949 | static int generate_filter(char *filter_expression, | |
950 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
951 | { | |
952 | int ret; | |
953 | struct filter_parser_ctx *ctx = NULL; | |
954 | FILE *fmem = NULL; | |
955 | ||
956 | assert(filter_expression); | |
957 | assert(lsm); | |
958 | assert(ctxp); | |
959 | ||
960 | /* | |
961 | * Casting const to non-const, as the underlying function will use it in | |
962 | * read-only mode. | |
963 | */ | |
964 | fmem = lttng_fmemopen((void *) filter_expression, | |
965 | strlen(filter_expression), "r"); | |
966 | if (!fmem) { | |
967 | fprintf(stderr, "Error opening memory as stream\n"); | |
968 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
969 | goto error; | |
970 | } | |
971 | ctx = filter_parser_ctx_alloc(fmem); | |
972 | if (!ctx) { | |
973 | fprintf(stderr, "Error allocating parser\n"); | |
974 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
975 | goto filter_alloc_error; | |
976 | } | |
977 | ret = filter_parser_ctx_append_ast(ctx); | |
978 | if (ret) { | |
979 | fprintf(stderr, "Parse error\n"); | |
980 | ret = -LTTNG_ERR_FILTER_INVAL; | |
981 | goto parse_error; | |
982 | } | |
137b9942 DG |
983 | if (print_xml) { |
984 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
985 | if (ret) { | |
986 | fflush(stdout); | |
987 | fprintf(stderr, "XML print error\n"); | |
988 | ret = -LTTNG_ERR_FILTER_INVAL; | |
989 | goto parse_error; | |
990 | } | |
991 | } | |
992 | ||
993 | dbg_printf("Generating IR... "); | |
994 | fflush(stdout); | |
995 | ret = filter_visitor_ir_generate(ctx); | |
996 | if (ret) { | |
997 | fprintf(stderr, "Generate IR error\n"); | |
998 | ret = -LTTNG_ERR_FILTER_INVAL; | |
999 | goto parse_error; | |
1000 | } | |
1001 | dbg_printf("done\n"); | |
1002 | ||
1003 | dbg_printf("Validating IR... "); | |
1004 | fflush(stdout); | |
1005 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
1006 | if (ret) { | |
1007 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1008 | goto parse_error; | |
1009 | } | |
9f449915 PP |
1010 | |
1011 | /* Normalize globbing patterns in the expression. */ | |
1012 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
1013 | if (ret) { | |
1014 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1015 | goto parse_error; | |
1016 | } | |
1017 | ||
9ae110e2 | 1018 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
1019 | ret = filter_visitor_ir_validate_string(ctx); |
1020 | if (ret) { | |
1021 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1022 | goto parse_error; | |
1023 | } | |
9f449915 PP |
1024 | |
1025 | /* Validate globbing patterns in the expression. */ | |
1026 | ret = filter_visitor_ir_validate_globbing(ctx); | |
1027 | if (ret) { | |
1028 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1029 | goto parse_error; | |
1030 | } | |
1031 | ||
137b9942 DG |
1032 | dbg_printf("done\n"); |
1033 | ||
1034 | dbg_printf("Generating bytecode... "); | |
1035 | fflush(stdout); | |
1036 | ret = filter_visitor_bytecode_generate(ctx); | |
1037 | if (ret) { | |
1038 | fprintf(stderr, "Generate bytecode error\n"); | |
1039 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1040 | goto parse_error; | |
1041 | } | |
1042 | dbg_printf("done\n"); | |
1043 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
1044 | bytecode_get_len(&ctx->bytecode->b)); | |
1045 | ||
1046 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1047 | + bytecode_get_len(&ctx->bytecode->b); | |
1048 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
1049 | ||
1050 | /* No need to keep the memory stream. */ | |
1051 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1052 | PERROR("fclose"); |
137b9942 DG |
1053 | } |
1054 | ||
1055 | *ctxp = ctx; | |
1056 | return 0; | |
1057 | ||
1058 | parse_error: | |
137b9942 DG |
1059 | filter_ir_free(ctx); |
1060 | filter_parser_ctx_free(ctx); | |
1061 | filter_alloc_error: | |
1062 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1063 | PERROR("fclose"); |
137b9942 DG |
1064 | } |
1065 | error: | |
1066 | return ret; | |
1067 | } | |
1068 | ||
93deb080 JI |
1069 | /* |
1070 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1071 | * If no event name is specified, all events are enabled. | |
1072 | * If no channel name is specified, the default name is used. | |
1073 | * If filter expression is not NULL, the filter is set for the event. | |
1074 | * If exclusion count is not zero, the exclusions are set for the event. | |
1075 | * Returns size of returned session payload data or a negative error code. | |
1076 | */ | |
1077 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1078 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1079 | const char *original_filter_expression, |
93deb080 JI |
1080 | int exclusion_count, char **exclusion_list) |
1081 | { | |
1082 | struct lttcomm_session_msg lsm; | |
15e37663 JG |
1083 | struct lttng_dynamic_buffer send_buffer; |
1084 | int ret = 0, i, fd_to_send = -1; | |
1085 | bool send_fd = false; | |
137b9942 | 1086 | unsigned int free_filter_expression = 0; |
93deb080 | 1087 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1088 | |
6ea91205 YL |
1089 | /* |
1090 | * We have either a filter or some exclusions, so we need to set up | |
1091 | * a variable-length memory block from where to send the data. | |
1092 | */ | |
1093 | lttng_dynamic_buffer_init(&send_buffer); | |
ec005ec6 | 1094 | |
e9efbcd3 JG |
1095 | /* |
1096 | * Cast as non-const since we may replace the filter expression | |
1097 | * by a dynamically allocated string. Otherwise, the original | |
1098 | * string is not modified. | |
1099 | */ | |
1100 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1101 | |
1102 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1103 | ret = -LTTNG_ERR_INVALID; |
1104 | goto error; | |
93deb080 JI |
1105 | } |
1106 | ||
9ae110e2 JG |
1107 | /* |
1108 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1109 | * anyway, so treat this corner-case early to eliminate |
1110 | * lttng_fmemopen error for 0-byte allocation. | |
1111 | */ | |
1112 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1113 | ret = -LTTNG_ERR_INVALID; |
1114 | goto error; | |
93deb080 JI |
1115 | } |
1116 | ||
1117 | memset(&lsm, 0, sizeof(lsm)); | |
1118 | ||
1119 | /* If no channel name, send empty string. */ | |
1120 | if (channel_name == NULL) { | |
1121 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1122 | sizeof(lsm.u.enable.channel_name)); | |
1123 | } else { | |
1124 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1125 | sizeof(lsm.u.enable.channel_name)); | |
1126 | } | |
1127 | ||
18a720cd MD |
1128 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1129 | if (ev->name[0] == '\0') { | |
1130 | /* Enable all events */ | |
1131 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1132 | } |
93deb080 | 1133 | |
67040e31 | 1134 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1135 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1136 | ||
1137 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1138 | sizeof(lsm.session.name)); | |
1139 | lsm.u.enable.exclusion_count = exclusion_count; | |
1140 | lsm.u.enable.bytecode_len = 0; | |
1141 | ||
9ae110e2 | 1142 | /* Parse filter expression. */ |
5cdb6027 | 1143 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1144 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1145 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1146 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1147 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1148 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1149 | char *agent_filter; | |
64226865 | 1150 | |
347c5ab5 | 1151 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1152 | agent_filter = set_agent_filter(filter_expression, ev); |
1153 | if (!agent_filter) { | |
137b9942 | 1154 | if (!filter_expression) { |
9ae110e2 JG |
1155 | /* |
1156 | * No JUL and no filter, just skip | |
1157 | * everything below. | |
1158 | */ | |
137b9942 DG |
1159 | goto ask_sessiond; |
1160 | } | |
64226865 DG |
1161 | } else { |
1162 | /* | |
9ae110e2 JG |
1163 | * With an agent filter, the original filter has |
1164 | * been added to it thus replace the filter | |
1165 | * expression. | |
64226865 | 1166 | */ |
0e115563 | 1167 | filter_expression = agent_filter; |
e9efbcd3 | 1168 | free_filter_expression = 1; |
9b21e6d5 | 1169 | } |
9b21e6d5 | 1170 | } |
93deb080 | 1171 | |
137b9942 | 1172 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1173 | if (ret) { |
137b9942 | 1174 | goto filter_error; |
93deb080 | 1175 | } |
6b453b5e JG |
1176 | } |
1177 | ||
15e37663 JG |
1178 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1179 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1180 | + lsm.u.enable.expression_len |
1181 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1182 | if (ret) { |
6b453b5e | 1183 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1184 | goto mem_error; |
6b453b5e | 1185 | } |
137b9942 | 1186 | |
9ae110e2 | 1187 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1188 | for (i = 0; i < exclusion_count; i++) { |
1189 | size_t exclusion_len; | |
1190 | ||
1191 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1192 | LTTNG_SYMBOL_NAME_LEN); | |
1193 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1194 | /* Exclusion is not NULL-terminated. */ | |
1195 | ret = -LTTNG_ERR_INVALID; | |
1196 | goto mem_error; | |
1197 | } | |
1198 | ||
1199 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1200 | *(exclusion_list + i), | |
1201 | LTTNG_SYMBOL_NAME_LEN); | |
1202 | if (ret) { | |
1203 | goto mem_error; | |
1204 | } | |
6b453b5e | 1205 | } |
15e37663 | 1206 | |
9ae110e2 | 1207 | /* Add filter expression next. */ |
15e37663 JG |
1208 | if (filter_expression) { |
1209 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1210 | filter_expression, lsm.u.enable.expression_len); | |
1211 | if (ret) { | |
1212 | goto mem_error; | |
1213 | } | |
6b453b5e | 1214 | } |
9ae110e2 | 1215 | /* Add filter bytecode next. */ |
137b9942 | 1216 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1217 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1218 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1219 | if (ret) { | |
1220 | goto mem_error; | |
1221 | } | |
1222 | } | |
1223 | if (ev->extended.ptr) { | |
1224 | struct lttng_event_extended *ev_ext = | |
1225 | (struct lttng_event_extended *) ev->extended.ptr; | |
1226 | ||
1227 | if (ev_ext->probe_location) { | |
1228 | /* | |
1229 | * lttng_userspace_probe_location_serialize returns the | |
1230 | * number of bytes that was appended to the buffer. | |
1231 | */ | |
1232 | ret = lttng_userspace_probe_location_serialize( | |
1233 | ev_ext->probe_location, &send_buffer, | |
1234 | &fd_to_send); | |
56f0bc67 | 1235 | if (ret < 0) { |
15e37663 JG |
1236 | goto mem_error; |
1237 | } | |
1238 | ||
1239 | send_fd = fd_to_send >= 0; | |
1240 | /* | |
1241 | * Set the size of the userspace probe location element | |
1242 | * of the buffer so that the receiving side knows where | |
1243 | * to split it. | |
1244 | */ | |
1245 | lsm.u.enable.userspace_probe_location_len = ret; | |
1246 | } | |
93deb080 JI |
1247 | } |
1248 | ||
15e37663 JG |
1249 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1250 | send_fd ? &fd_to_send : NULL, | |
1251 | send_fd ? 1 : 0, | |
1252 | send_buffer.size ? send_buffer.data : NULL, | |
1253 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1254 | |
7ca1dc6f DG |
1255 | mem_error: |
1256 | if (filter_expression && ctx) { | |
93deb080 JI |
1257 | filter_bytecode_free(ctx); |
1258 | filter_ir_free(ctx); | |
1259 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1260 | } |
1261 | filter_error: | |
1262 | if (free_filter_expression) { | |
1263 | /* | |
9ae110e2 JG |
1264 | * The filter expression has been replaced and must be freed as |
1265 | * it is not the original filter expression received as a | |
1266 | * parameter. | |
7ca1dc6f DG |
1267 | */ |
1268 | free(filter_expression); | |
93deb080 | 1269 | } |
137b9942 DG |
1270 | error: |
1271 | /* | |
9ae110e2 JG |
1272 | * Return directly to the caller and don't ask the sessiond since |
1273 | * something went wrong in the parsing of data above. | |
137b9942 | 1274 | */ |
15e37663 | 1275 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1276 | return ret; |
3e1c9ff7 DG |
1277 | |
1278 | ask_sessiond: | |
1279 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1280 | return ret; | |
93deb080 JI |
1281 | } |
1282 | ||
6e911cad MD |
1283 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1284 | struct lttng_event *ev, const char *channel_name, | |
1285 | const char *original_filter_expression) | |
1df4dedd | 1286 | { |
cd80958d | 1287 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1288 | char *varlen_data; |
1289 | int ret = 0; | |
1290 | unsigned int free_filter_expression = 0; | |
1291 | struct filter_parser_ctx *ctx = NULL; | |
1292 | /* | |
1293 | * Cast as non-const since we may replace the filter expression | |
1294 | * by a dynamically allocated string. Otherwise, the original | |
1295 | * string is not modified. | |
1296 | */ | |
1297 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1298 | |
6e911cad MD |
1299 | if (handle == NULL || ev == NULL) { |
1300 | ret = -LTTNG_ERR_INVALID; | |
1301 | goto error; | |
1302 | } | |
1303 | ||
9ae110e2 JG |
1304 | /* |
1305 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1306 | * anyway, so treat this corner-case early to eliminate |
1307 | * lttng_fmemopen error for 0-byte allocation. | |
1308 | */ | |
1309 | if (filter_expression && filter_expression[0] == '\0') { | |
1310 | ret = -LTTNG_ERR_INVALID; | |
1311 | goto error; | |
cd80958d DG |
1312 | } |
1313 | ||
441c16a7 MD |
1314 | memset(&lsm, 0, sizeof(lsm)); |
1315 | ||
85076754 MD |
1316 | /* If no channel name, send empty string. */ |
1317 | if (channel_name == NULL) { | |
1318 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1319 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1320 | } else { |
85076754 | 1321 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1322 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1323 | } |
1324 | ||
18a720cd | 1325 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1326 | |
67040e31 | 1327 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1328 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1329 | ||
cac3069d | 1330 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1331 | sizeof(lsm.session.name)); |
6e911cad | 1332 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1333 | |
6e911cad MD |
1334 | /* |
1335 | * For the JUL domain, a filter is enforced except for the | |
1336 | * disable all event. This is done to avoid having the event in | |
1337 | * all sessions thus filtering by logger name. | |
1338 | */ | |
1339 | if (filter_expression == NULL && | |
1340 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1341 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1342 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1343 | goto ask_sessiond; |
1344 | } | |
1345 | ||
1346 | /* | |
1347 | * We have a filter, so we need to set up a variable-length | |
1348 | * memory block from where to send the data. | |
1349 | */ | |
1350 | ||
1351 | /* Parse filter expression */ | |
1352 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1353 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1354 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1355 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1356 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1357 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1358 | char *agent_filter; | |
6e911cad MD |
1359 | |
1360 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1361 | agent_filter = set_agent_filter(filter_expression, ev); |
1362 | if (!agent_filter) { | |
6e911cad | 1363 | if (!filter_expression) { |
9ae110e2 JG |
1364 | /* |
1365 | * No JUL and no filter, just skip | |
1366 | * everything below. | |
1367 | */ | |
6e911cad MD |
1368 | goto ask_sessiond; |
1369 | } | |
1370 | } else { | |
1371 | /* | |
9ae110e2 JG |
1372 | * With a JUL filter, the original filter has |
1373 | * been added to it thus replace the filter | |
1374 | * expression. | |
6e911cad | 1375 | */ |
0e115563 | 1376 | filter_expression = agent_filter; |
6e911cad MD |
1377 | free_filter_expression = 1; |
1378 | } | |
1379 | } | |
1380 | ||
1381 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1382 | if (ret) { | |
1383 | goto filter_error; | |
1384 | } | |
1385 | } | |
1386 | ||
1387 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1388 | + lsm.u.disable.expression_len); | |
1389 | if (!varlen_data) { | |
1390 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1391 | goto mem_error; | |
1392 | } | |
1393 | ||
9ae110e2 | 1394 | /* Add filter expression. */ |
6e911cad MD |
1395 | if (lsm.u.disable.expression_len != 0) { |
1396 | memcpy(varlen_data, | |
1397 | filter_expression, | |
1398 | lsm.u.disable.expression_len); | |
1399 | } | |
9ae110e2 | 1400 | /* Add filter bytecode next. */ |
6e911cad MD |
1401 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1402 | memcpy(varlen_data | |
1403 | + lsm.u.disable.expression_len, | |
1404 | &ctx->bytecode->b, | |
1405 | lsm.u.disable.bytecode_len); | |
1406 | } | |
1407 | ||
795a978d | 1408 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1409 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1410 | free(varlen_data); | |
1411 | ||
1412 | mem_error: | |
1413 | if (filter_expression && ctx) { | |
1414 | filter_bytecode_free(ctx); | |
1415 | filter_ir_free(ctx); | |
1416 | filter_parser_ctx_free(ctx); | |
1417 | } | |
1418 | filter_error: | |
1419 | if (free_filter_expression) { | |
1420 | /* | |
9ae110e2 JG |
1421 | * The filter expression has been replaced and must be freed as |
1422 | * it is not the original filter expression received as a | |
1423 | * parameter. | |
6e911cad MD |
1424 | */ |
1425 | free(filter_expression); | |
1426 | } | |
1427 | error: | |
1428 | /* | |
9ae110e2 JG |
1429 | * Return directly to the caller and don't ask the sessiond since |
1430 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1431 | */ |
1432 | return ret; | |
1433 | ||
1434 | ask_sessiond: | |
1435 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1436 | return ret; | |
1437 | } | |
1438 | ||
1439 | /* | |
9ae110e2 JG |
1440 | * Disable event(s) of a channel and domain. |
1441 | * If no event name is specified, all events are disabled. | |
1442 | * If no channel name is specified, the default 'channel0' is used. | |
1443 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1444 | */ |
1445 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1446 | const char *channel_name) | |
1447 | { | |
1448 | struct lttng_event ev; | |
1449 | ||
1450 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1451 | ev.loglevel = -1; |
6e911cad MD |
1452 | ev.type = LTTNG_EVENT_ALL; |
1453 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1454 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1455 | } |
1456 | ||
cf0bcb51 JG |
1457 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1458 | { | |
1459 | struct lttng_channel *channel = NULL; | |
1460 | struct lttng_channel_extended *extended = NULL; | |
1461 | ||
1462 | if (!domain) { | |
1463 | goto error; | |
1464 | } | |
1465 | ||
1466 | /* Validate domain. */ | |
1467 | switch (domain->type) { | |
1468 | case LTTNG_DOMAIN_UST: | |
1469 | switch (domain->buf_type) { | |
1470 | case LTTNG_BUFFER_PER_UID: | |
1471 | case LTTNG_BUFFER_PER_PID: | |
1472 | break; | |
1473 | default: | |
1474 | goto error; | |
1475 | } | |
1476 | break; | |
1477 | case LTTNG_DOMAIN_KERNEL: | |
1478 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1479 | goto error; | |
1480 | } | |
1481 | break; | |
1482 | default: | |
1483 | goto error; | |
1484 | } | |
1485 | ||
1486 | channel = zmalloc(sizeof(*channel)); | |
1487 | if (!channel) { | |
1488 | goto error; | |
1489 | } | |
1490 | ||
1491 | extended = zmalloc(sizeof(*extended)); | |
1492 | if (!extended) { | |
1493 | goto error; | |
1494 | } | |
1495 | ||
1496 | channel->attr.extended.ptr = extended; | |
1497 | ||
1498 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1499 | return channel; | |
1500 | error: | |
1501 | free(channel); | |
1502 | free(extended); | |
1503 | return NULL; | |
1504 | } | |
1505 | ||
1506 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1507 | { | |
1508 | if (!channel) { | |
1509 | return; | |
1510 | } | |
1511 | ||
1512 | if (channel->attr.extended.ptr) { | |
1513 | free(channel->attr.extended.ptr); | |
1514 | } | |
1515 | free(channel); | |
1516 | } | |
1517 | ||
1df4dedd | 1518 | /* |
9ae110e2 JG |
1519 | * Enable channel per domain |
1520 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1521 | */ |
cd80958d | 1522 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1523 | struct lttng_channel *in_chan) |
a5c5a2bd | 1524 | { |
cd80958d | 1525 | struct lttcomm_session_msg lsm; |
e3091d6a | 1526 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1527 | |
9ae110e2 | 1528 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1529 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1530 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1531 | } |
1532 | ||
441c16a7 | 1533 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1534 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1535 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1536 | |
cf0bcb51 JG |
1537 | if (!in_chan->attr.extended.ptr) { |
1538 | struct lttng_channel *channel; | |
1539 | struct lttng_channel_extended *extended; | |
7d29a247 | 1540 | |
cf0bcb51 JG |
1541 | channel = lttng_channel_create(&handle->domain); |
1542 | if (!channel) { | |
1543 | return -LTTNG_ERR_NOMEM; | |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * Create a new channel in order to use default extended | |
1548 | * attribute values. | |
1549 | */ | |
1550 | extended = (struct lttng_channel_extended *) | |
1551 | channel->attr.extended.ptr; | |
1552 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1553 | lttng_channel_destroy(channel); | |
1554 | } else { | |
1555 | struct lttng_channel_extended *extended; | |
1556 | ||
1557 | extended = (struct lttng_channel_extended *) | |
1558 | in_chan->attr.extended.ptr; | |
1559 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1560 | } | |
cd80958d | 1561 | |
e3091d6a FD |
1562 | /* |
1563 | * Verify that the amount of memory required to create the requested | |
1564 | * buffer is available on the system at the moment. | |
1565 | */ | |
1566 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1567 | lsm.u.channel.chan.attr.subbuf_size; | |
1568 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1569 | return -LTTNG_ERR_NOMEM; | |
1570 | } | |
1571 | ||
cf0bcb51 | 1572 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
67040e31 | 1573 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1574 | |
cac3069d | 1575 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1576 | sizeof(lsm.session.name)); |
1577 | ||
cac3069d | 1578 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1579 | } |
1df4dedd | 1580 | |
2ef84c95 | 1581 | /* |
9ae110e2 JG |
1582 | * All tracing will be stopped for registered events of the channel. |
1583 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1584 | */ |
cd80958d | 1585 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1586 | { |
cd80958d DG |
1587 | struct lttcomm_session_msg lsm; |
1588 | ||
9ae110e2 | 1589 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1590 | if (handle == NULL || name == NULL) { |
2f70b271 | 1591 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1592 | } |
1593 | ||
441c16a7 MD |
1594 | memset(&lsm, 0, sizeof(lsm)); |
1595 | ||
cd80958d | 1596 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1597 | |
cac3069d | 1598 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1599 | sizeof(lsm.u.disable.channel_name)); |
1600 | ||
67040e31 | 1601 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1602 | |
cac3069d | 1603 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1604 | sizeof(lsm.session.name)); |
1605 | ||
cac3069d | 1606 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1607 | } |
1608 | ||
ccf10263 | 1609 | /* |
9ae110e2 JG |
1610 | * Add PID to session tracker. |
1611 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1612 | */ |
1613 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
1614 | { | |
1615 | struct lttcomm_session_msg lsm; | |
1616 | ||
9ae110e2 | 1617 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1618 | if (handle == NULL) { |
1619 | return -LTTNG_ERR_INVALID; | |
1620 | } | |
1621 | ||
1622 | memset(&lsm, 0, sizeof(lsm)); | |
1623 | ||
1624 | lsm.cmd_type = LTTNG_TRACK_PID; | |
1625 | lsm.u.pid_tracker.pid = pid; | |
1626 | ||
67040e31 | 1627 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
ccf10263 MD |
1628 | |
1629 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1630 | sizeof(lsm.session.name)); | |
1631 | ||
1632 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1633 | } | |
1634 | ||
1635 | /* | |
9ae110e2 JG |
1636 | * Remove PID from session tracker. |
1637 | * Return 0 on success else a negative LTTng error code. | |
ccf10263 MD |
1638 | */ |
1639 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
1640 | { | |
1641 | struct lttcomm_session_msg lsm; | |
1642 | ||
9ae110e2 | 1643 | /* NULL arguments are forbidden. No default values. */ |
ccf10263 MD |
1644 | if (handle == NULL) { |
1645 | return -LTTNG_ERR_INVALID; | |
1646 | } | |
1647 | ||
1648 | memset(&lsm, 0, sizeof(lsm)); | |
1649 | ||
1650 | lsm.cmd_type = LTTNG_UNTRACK_PID; | |
1651 | lsm.u.pid_tracker.pid = pid; | |
1652 | ||
67040e31 | 1653 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
ccf10263 MD |
1654 | |
1655 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1656 | sizeof(lsm.session.name)); | |
1657 | ||
1658 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
1659 | } | |
1660 | ||
fac6795d | 1661 | /* |
9ae110e2 JG |
1662 | * Lists all available tracepoints of domain. |
1663 | * Sets the contents of the events array. | |
1664 | * Returns the number of lttng_event entries in events; | |
1665 | * on error, returns a negative value. | |
fac6795d | 1666 | */ |
cd80958d | 1667 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1668 | struct lttng_event **events) |
fac6795d | 1669 | { |
052da939 | 1670 | int ret; |
cd80958d DG |
1671 | struct lttcomm_session_msg lsm; |
1672 | ||
9d697d3d | 1673 | if (handle == NULL) { |
2f70b271 | 1674 | return -LTTNG_ERR_INVALID; |
cd80958d | 1675 | } |
fac6795d | 1676 | |
53efb85a | 1677 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1678 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
67040e31 | 1679 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1680 | |
cac3069d | 1681 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1682 | if (ret < 0) { |
1683 | return ret; | |
eb354453 | 1684 | } |
fac6795d | 1685 | |
9f19cc17 | 1686 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1687 | } |
1688 | ||
f37d259d | 1689 | /* |
9ae110e2 JG |
1690 | * Lists all available tracepoint fields of domain. |
1691 | * Sets the contents of the event field array. | |
1692 | * Returns the number of lttng_event_field entries in events; | |
1693 | * on error, returns a negative value. | |
f37d259d MD |
1694 | */ |
1695 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1696 | struct lttng_event_field **fields) | |
1697 | { | |
1698 | int ret; | |
1699 | struct lttcomm_session_msg lsm; | |
1700 | ||
1701 | if (handle == NULL) { | |
2f70b271 | 1702 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1703 | } |
1704 | ||
53efb85a | 1705 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1706 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
67040e31 | 1707 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1708 | |
cac3069d | 1709 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1710 | if (ret < 0) { |
1711 | return ret; | |
1712 | } | |
1713 | ||
1714 | return ret / sizeof(struct lttng_event_field); | |
1715 | } | |
1716 | ||
834978fd | 1717 | /* |
9ae110e2 JG |
1718 | * Lists all available kernel system calls. Allocates and sets the contents of |
1719 | * the events array. | |
834978fd | 1720 | * |
9ae110e2 JG |
1721 | * Returns the number of lttng_event entries in events; on error, returns a |
1722 | * negative value. | |
834978fd DG |
1723 | */ |
1724 | int lttng_list_syscalls(struct lttng_event **events) | |
1725 | { | |
1726 | int ret; | |
1727 | struct lttcomm_session_msg lsm; | |
1728 | ||
1729 | if (!events) { | |
1730 | return -LTTNG_ERR_INVALID; | |
1731 | } | |
1732 | ||
1733 | memset(&lsm, 0, sizeof(lsm)); | |
1734 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1735 | /* Force kernel domain for system calls. */ | |
1736 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1737 | ||
1738 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1739 | if (ret < 0) { | |
1740 | return ret; | |
1741 | } | |
1742 | ||
1743 | return ret / sizeof(struct lttng_event); | |
1744 | } | |
1745 | ||
1657e9bb | 1746 | /* |
9ae110e2 JG |
1747 | * Returns a human readable string describing |
1748 | * the error code (a negative value). | |
1657e9bb | 1749 | */ |
9a745bc7 | 1750 | const char *lttng_strerror(int code) |
1657e9bb | 1751 | { |
f73fabfd | 1752 | return error_get_str(code); |
1657e9bb DG |
1753 | } |
1754 | ||
5feee503 JG |
1755 | enum lttng_error_code lttng_create_session_ext( |
1756 | struct lttng_session_descriptor *session_descriptor) | |
1757 | { | |
1758 | enum lttng_error_code ret_code; | |
1759 | struct lttcomm_session_msg lsm = { | |
1760 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1761 | }; | |
1762 | void *reply = NULL; | |
1763 | struct lttng_buffer_view reply_view; | |
1764 | int reply_ret; | |
1765 | bool sessiond_must_generate_ouput; | |
1766 | struct lttng_dynamic_buffer payload; | |
1767 | int ret; | |
1768 | size_t descriptor_size; | |
1769 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1770 | ||
1771 | lttng_dynamic_buffer_init(&payload); | |
1772 | if (!session_descriptor) { | |
1773 | ret_code = LTTNG_ERR_INVALID; | |
1774 | goto end; | |
1775 | } | |
1776 | ||
1777 | sessiond_must_generate_ouput = | |
1778 | !lttng_session_descriptor_is_output_destination_initialized( | |
1779 | session_descriptor); | |
1780 | if (sessiond_must_generate_ouput) { | |
1781 | const char *home_dir = utils_get_home_dir(); | |
1782 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1783 | ||
1784 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1785 | ret_code = LTTNG_ERR_FATAL; | |
1786 | goto end; | |
1787 | } | |
1788 | ||
1789 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1790 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1791 | home_dir_len); | |
1792 | if (ret) { | |
1793 | ret_code = LTTNG_ERR_NOMEM; | |
1794 | goto end; | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | descriptor_size = payload.size; | |
1799 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1800 | &payload); | |
1801 | if (ret) { | |
1802 | ret_code = LTTNG_ERR_INVALID; | |
1803 | goto end; | |
1804 | } | |
1805 | descriptor_size = payload.size - descriptor_size; | |
1806 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1807 | ||
1808 | /* Command returns a session descriptor on success. */ | |
1809 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1810 | payload.size, &reply); | |
1811 | if (reply_ret < 0) { | |
1812 | ret_code = -reply_ret; | |
1813 | goto end; | |
1814 | } else if (reply_ret == 0) { | |
1815 | /* Socket unexpectedly closed by the session daemon. */ | |
1816 | ret_code = LTTNG_ERR_FATAL; | |
1817 | goto end; | |
1818 | } | |
1819 | ||
1820 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1821 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1822 | &descriptor_reply); | |
1823 | if (ret < 0) { | |
1824 | ret_code = LTTNG_ERR_FATAL; | |
1825 | goto end; | |
1826 | } | |
1827 | ret_code = LTTNG_OK; | |
1828 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1829 | end: | |
1830 | free(reply); | |
1831 | lttng_dynamic_buffer_reset(&payload); | |
1832 | lttng_session_descriptor_destroy(descriptor_reply); | |
1833 | return ret_code; | |
1834 | } | |
1835 | ||
aaf97519 | 1836 | /* |
5feee503 | 1837 | * Create a new session using name and url for destination. |
a4b92340 | 1838 | * |
b3459096 | 1839 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1840 | */ |
a4b92340 | 1841 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1842 | { |
3dd05a85 | 1843 | int ret; |
a4b92340 | 1844 | ssize_t size; |
a4b92340 | 1845 | struct lttng_uri *uris = NULL; |
5feee503 JG |
1846 | struct lttng_session_descriptor *descriptor = NULL; |
1847 | enum lttng_error_code ret_code; | |
00e2e675 | 1848 | |
5feee503 JG |
1849 | if (!name) { |
1850 | ret = -LTTNG_ERR_INVALID; | |
1851 | goto end; | |
00e2e675 DG |
1852 | } |
1853 | ||
bc894455 | 1854 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1855 | if (size < 0) { |
5feee503 JG |
1856 | ret = -LTTNG_ERR_INVALID; |
1857 | goto end; | |
1858 | } | |
1859 | switch (size) { | |
1860 | case 0: | |
1861 | descriptor = lttng_session_descriptor_create(name); | |
1862 | break; | |
1863 | case 1: | |
1864 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1865 | ret = -LTTNG_ERR_INVALID; | |
1866 | goto end; | |
1867 | } | |
1868 | descriptor = lttng_session_descriptor_local_create(name, | |
1869 | uris[0].dst.path); | |
1870 | break; | |
1871 | case 2: | |
1872 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1873 | NULL); | |
1874 | break; | |
1875 | default: | |
1876 | ret = -LTTNG_ERR_INVALID; | |
1877 | goto end; | |
1878 | } | |
1879 | if (!descriptor) { | |
1880 | ret = -LTTNG_ERR_INVALID; | |
1881 | goto end; | |
00e2e675 | 1882 | } |
5feee503 JG |
1883 | ret_code = lttng_create_session_ext(descriptor); |
1884 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1885 | end: | |
1886 | lttng_session_descriptor_destroy(descriptor); | |
1887 | free(uris); | |
1888 | return ret; | |
1889 | } | |
00e2e675 | 1890 | |
5feee503 JG |
1891 | /* |
1892 | * Create a session exclusively used for snapshot. | |
1893 | * | |
b3459096 | 1894 | * Return 0 on success else a negative LTTng error code. |
5feee503 JG |
1895 | */ |
1896 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1897 | { | |
1898 | int ret; | |
1899 | enum lttng_error_code ret_code; | |
1900 | ssize_t size; | |
1901 | struct lttng_uri *uris = NULL; | |
1902 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1903 | |
5feee503 JG |
1904 | if (!name) { |
1905 | ret = -LTTNG_ERR_INVALID; | |
1906 | goto end; | |
1907 | } | |
1908 | ||
1909 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1910 | if (size < 0) { | |
1911 | ret = -LTTNG_ERR_INVALID; | |
1912 | goto end; | |
1913 | } | |
1914 | /* | |
1915 | * If the user does not specify a custom subdir, use the session name. | |
1916 | */ | |
1917 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1918 | strlen(uris[0].subdir) == 0) { | |
1919 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1920 | name); | |
1921 | if (ret < 0) { | |
1922 | PERROR("Failed to set session name as network destination sub-directory"); | |
1923 | ret = -LTTNG_ERR_FATAL; | |
1924 | goto end; | |
1925 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1926 | /* Truncated output. */ | |
1927 | ret = -LTTNG_ERR_INVALID; | |
1928 | goto end; | |
1929 | } | |
1930 | } | |
3dd05a85 | 1931 | |
5feee503 JG |
1932 | switch (size) { |
1933 | case 0: | |
1934 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1935 | break; | |
1936 | case 1: | |
1937 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1938 | ret = -LTTNG_ERR_INVALID; | |
1939 | goto end; | |
1940 | } | |
1941 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1942 | name, | |
1943 | uris[0].dst.path); | |
1944 | break; | |
1945 | case 2: | |
1946 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1947 | name, | |
1948 | snapshot_url, | |
1949 | NULL); | |
1950 | break; | |
1951 | default: | |
1952 | ret = -LTTNG_ERR_INVALID; | |
1953 | goto end; | |
1954 | } | |
1955 | if (!descriptor) { | |
1956 | ret = -LTTNG_ERR_INVALID; | |
1957 | goto end; | |
1958 | } | |
1959 | ret_code = lttng_create_session_ext(descriptor); | |
1960 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1961 | end: | |
1962 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1963 | free(uris); |
1964 | return ret; | |
00e2e675 DG |
1965 | } |
1966 | ||
5feee503 JG |
1967 | /* |
1968 | * Create a session exclusively used for live. | |
1969 | * | |
b3459096 | 1970 | * Return 0 on success else a negative LTTng error code. |
5feee503 JG |
1971 | */ |
1972 | int lttng_create_session_live(const char *name, const char *url, | |
1973 | unsigned int timer_interval) | |
1974 | { | |
1975 | int ret; | |
1976 | enum lttng_error_code ret_code; | |
1977 | struct lttng_session_descriptor *descriptor = NULL; | |
1978 | ||
1979 | if (!name) { | |
1980 | ret = -LTTNG_ERR_INVALID; | |
1981 | goto end; | |
1982 | } | |
1983 | ||
1984 | if (url) { | |
1985 | descriptor = lttng_session_descriptor_live_network_create( | |
1986 | name, url, NULL, timer_interval); | |
1987 | } else { | |
1988 | descriptor = lttng_session_descriptor_live_create( | |
1989 | name, timer_interval); | |
1990 | } | |
1991 | if (!descriptor) { | |
1992 | ret = -LTTNG_ERR_INVALID; | |
1993 | goto end; | |
1994 | } | |
1995 | ret_code = lttng_create_session_ext(descriptor); | |
1996 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1997 | end: | |
1998 | lttng_session_descriptor_destroy(descriptor); | |
1999 | return ret; | |
2000 | } | |
2001 | ||
e20ee7c2 JD |
2002 | /* |
2003 | * Stop the session and wait for the data before destroying it | |
b3459096 MD |
2004 | * |
2005 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2006 | */ |
2007 | int lttng_destroy_session(const char *session_name) | |
2008 | { | |
2009 | int ret; | |
823a1989 JG |
2010 | enum lttng_error_code ret_code; |
2011 | enum lttng_destruction_handle_status status; | |
2012 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2013 | |
2014 | /* | |
823a1989 JG |
2015 | * Stop the tracing and wait for the data to be |
2016 | * consumed. | |
e20ee7c2 JD |
2017 | */ |
2018 | ret = _lttng_stop_tracing(session_name, 1); | |
2019 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2020 | goto end; | |
2021 | } | |
2022 | ||
823a1989 JG |
2023 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2024 | if (ret_code != LTTNG_OK) { | |
2025 | ret = (int) -ret_code; | |
2026 | goto end; | |
2027 | } | |
2028 | assert(handle); | |
2029 | ||
2030 | /* Block until the completion of the destruction of the session. */ | |
2031 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2032 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2033 | ret = -LTTNG_ERR_UNK; | |
2034 | goto end; | |
2035 | } | |
2036 | ||
2037 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2038 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2039 | ret = -LTTNG_ERR_UNK; | |
2040 | goto end; | |
2041 | } | |
b3459096 | 2042 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2043 | end: |
823a1989 | 2044 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2045 | return ret; |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * Destroy the session without waiting for the data. | |
2050 | */ | |
2051 | int lttng_destroy_session_no_wait(const char *session_name) | |
2052 | { | |
823a1989 | 2053 | enum lttng_error_code ret_code; |
e20ee7c2 | 2054 | |
823a1989 JG |
2055 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
2056 | return ret_code == LTTNG_OK ? ret_code : -ret_code; | |
e20ee7c2 JD |
2057 | } |
2058 | ||
57167058 | 2059 | /* |
9ae110e2 JG |
2060 | * Ask the session daemon for all available sessions. |
2061 | * Sets the contents of the sessions array. | |
2062 | * Returns the number of lttng_session entries in sessions; | |
2063 | * on error, returns a negative value. | |
57167058 | 2064 | */ |
5feee503 | 2065 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2066 | { |
ca95a216 | 2067 | int ret; |
cd80958d | 2068 | struct lttcomm_session_msg lsm; |
5feee503 JG |
2069 | const size_t session_size = sizeof(struct lttng_session) + |
2070 | sizeof(struct lttng_session_extended); | |
2071 | size_t session_count, i; | |
2072 | struct lttng_session_extended *sessions_extended_begin; | |
2073 | struct lttng_session *sessions = NULL; | |
57167058 | 2074 | |
53efb85a | 2075 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2076 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
5feee503 JG |
2077 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2078 | if (ret <= 0) { | |
5feee503 JG |
2079 | goto end; |
2080 | } | |
2081 | if (!sessions) { | |
2082 | ret = -LTTNG_ERR_FATAL; | |
2083 | goto end; | |
2084 | } | |
2085 | ||
2086 | if (ret % session_size) { | |
2087 | ret = -LTTNG_ERR_UNK; | |
2088 | free(sessions); | |
2089 | *out_sessions = NULL; | |
2090 | goto end; | |
57167058 | 2091 | } |
5feee503 JG |
2092 | session_count = (size_t) ret / session_size; |
2093 | sessions_extended_begin = (struct lttng_session_extended *) | |
2094 | (&sessions[session_count]); | |
57167058 | 2095 | |
5feee503 JG |
2096 | /* Set extended session info pointers. */ |
2097 | for (i = 0; i < session_count; i++) { | |
2098 | struct lttng_session *session = &sessions[i]; | |
2099 | struct lttng_session_extended *extended = | |
2100 | &(sessions_extended_begin[i]); | |
2101 | ||
2102 | session->extended.ptr = extended; | |
2103 | } | |
2104 | ||
2105 | ret = (int) session_count; | |
2106 | *out_sessions = sessions; | |
2107 | end: | |
2108 | return ret; | |
2109 | } | |
2110 | ||
2111 | enum lttng_error_code lttng_session_get_creation_time( | |
2112 | const struct lttng_session *session, uint64_t *creation_time) | |
2113 | { | |
2114 | enum lttng_error_code ret = LTTNG_OK; | |
2115 | struct lttng_session_extended *extended; | |
2116 | ||
2117 | if (!session || !creation_time || !session->extended.ptr) { | |
2118 | ret = LTTNG_ERR_INVALID; | |
2119 | goto end; | |
2120 | } | |
2121 | ||
2122 | extended = session->extended.ptr; | |
2123 | if (!extended->creation_time.is_set) { | |
2124 | /* Not created on the session daemon yet. */ | |
2125 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2126 | goto end; | |
2127 | } | |
2128 | *creation_time = extended->creation_time.value; | |
2129 | end: | |
2130 | return ret; | |
57167058 DG |
2131 | } |
2132 | ||
d7ba1388 MD |
2133 | int lttng_set_session_shm_path(const char *session_name, |
2134 | const char *shm_path) | |
2135 | { | |
2136 | struct lttcomm_session_msg lsm; | |
2137 | ||
2138 | if (session_name == NULL) { | |
2139 | return -LTTNG_ERR_INVALID; | |
2140 | } | |
2141 | ||
2142 | memset(&lsm, 0, sizeof(lsm)); | |
2143 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2144 | ||
2145 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2146 | sizeof(lsm.session.name)); | |
2147 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
2148 | sizeof(lsm.u.set_shm_path.shm_path)); | |
2149 | ||
2150 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
2151 | } | |
2152 | ||
9f19cc17 | 2153 | /* |
9ae110e2 JG |
2154 | * Ask the session daemon for all available domains of a session. |
2155 | * Sets the contents of the domains array. | |
2156 | * Returns the number of lttng_domain entries in domains; | |
2157 | * on error, returns a negative value. | |
9f19cc17 | 2158 | */ |
330be774 | 2159 | int lttng_list_domains(const char *session_name, |
cd80958d | 2160 | struct lttng_domain **domains) |
9f19cc17 DG |
2161 | { |
2162 | int ret; | |
cd80958d DG |
2163 | struct lttcomm_session_msg lsm; |
2164 | ||
330be774 | 2165 | if (session_name == NULL) { |
2f70b271 | 2166 | return -LTTNG_ERR_INVALID; |
cd80958d | 2167 | } |
9f19cc17 | 2168 | |
53efb85a | 2169 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2170 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2171 | ||
cac3069d DG |
2172 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2173 | sizeof(lsm.session.name)); | |
cd80958d | 2174 | |
cac3069d | 2175 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
2176 | if (ret < 0) { |
2177 | return ret; | |
2178 | } | |
2179 | ||
2180 | return ret / sizeof(struct lttng_domain); | |
2181 | } | |
2182 | ||
2183 | /* | |
9ae110e2 JG |
2184 | * Ask the session daemon for all available channels of a session. |
2185 | * Sets the contents of the channels array. | |
2186 | * Returns the number of lttng_channel entries in channels; | |
2187 | * on error, returns a negative value. | |
9f19cc17 | 2188 | */ |
cd80958d DG |
2189 | int lttng_list_channels(struct lttng_handle *handle, |
2190 | struct lttng_channel **channels) | |
9f19cc17 DG |
2191 | { |
2192 | int ret; | |
53e367f9 JG |
2193 | size_t channel_count, i; |
2194 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2195 | sizeof(struct lttng_channel_extended); |
cd80958d | 2196 | struct lttcomm_session_msg lsm; |
53e367f9 | 2197 | void *extended_at; |
cd80958d | 2198 | |
9d697d3d | 2199 | if (handle == NULL) { |
53e367f9 JG |
2200 | ret = -LTTNG_ERR_INVALID; |
2201 | goto end; | |
cd80958d DG |
2202 | } |
2203 | ||
53efb85a | 2204 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2205 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 2206 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2207 | sizeof(lsm.session.name)); |
9f19cc17 | 2208 | |
67040e31 | 2209 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2210 | |
cac3069d | 2211 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2212 | if (ret < 0) { |
53e367f9 JG |
2213 | goto end; |
2214 | } | |
2215 | ||
2216 | if (ret % channel_size) { | |
2217 | ret = -LTTNG_ERR_UNK; | |
2218 | free(*channels); | |
2219 | *channels = NULL; | |
2220 | goto end; | |
9f19cc17 | 2221 | } |
53e367f9 | 2222 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2223 | |
53e367f9 JG |
2224 | /* Set extended info pointers */ |
2225 | extended_at = ((void *) *channels) + | |
2226 | channel_count * sizeof(struct lttng_channel); | |
2227 | for (i = 0; i < channel_count; i++) { | |
2228 | struct lttng_channel *chan = &(*channels)[i]; | |
2229 | ||
2230 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2231 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2232 | } |
2233 | ||
2234 | ret = (int) channel_count; | |
2235 | end: | |
2236 | return ret; | |
9f19cc17 DG |
2237 | } |
2238 | ||
2239 | /* | |
9ae110e2 JG |
2240 | * Ask the session daemon for all available events of a session channel. |
2241 | * Sets the contents of the events array. | |
2242 | * Returns the number of lttng_event entries in events; | |
2243 | * on error, returns a negative value. | |
9f19cc17 | 2244 | */ |
cd80958d DG |
2245 | int lttng_list_events(struct lttng_handle *handle, |
2246 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2247 | { |
2248 | int ret; | |
cd80958d | 2249 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
2250 | struct lttcomm_event_command_header *cmd_header = NULL; |
2251 | size_t cmd_header_len; | |
2252 | uint32_t nb_events, i; | |
de453daa | 2253 | void *comm_ext_at; |
de453daa | 2254 | char *reception_buffer = NULL; |
56f0bc67 | 2255 | struct lttng_dynamic_buffer listing; |
de453daa | 2256 | size_t storage_req; |
9f19cc17 | 2257 | |
9d697d3d DG |
2258 | /* Safety check. An handle and channel name are mandatory */ |
2259 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 2260 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
2261 | } |
2262 | ||
53efb85a | 2263 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2264 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 2265 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2266 | sizeof(lsm.session.name)); |
cac3069d | 2267 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 2268 | sizeof(lsm.u.list.channel_name)); |
67040e31 | 2269 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2270 | |
a04d53fc | 2271 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
2272 | (void **) &reception_buffer, (void **) &cmd_header, |
2273 | &cmd_header_len); | |
9f19cc17 | 2274 | if (ret < 0) { |
de453daa | 2275 | goto end; |
9f19cc17 DG |
2276 | } |
2277 | ||
d9f484bc JG |
2278 | if (!cmd_header) { |
2279 | ret = -LTTNG_ERR_UNK; | |
2280 | goto end; | |
2281 | } | |
2282 | ||
b4e3ceb9 PP |
2283 | /* Set number of events and free command header */ |
2284 | nb_events = cmd_header->nb_events; | |
2285 | if (nb_events > INT_MAX) { | |
2286 | ret = -EOVERFLOW; | |
de453daa | 2287 | goto end; |
b4e3ceb9 | 2288 | } |
b4e3ceb9 PP |
2289 | free(cmd_header); |
2290 | cmd_header = NULL; | |
2291 | ||
de453daa JG |
2292 | /* |
2293 | * The buffer that is returned must contain a "flat" version of | |
2294 | * the events that are returned. In other words, all pointers | |
2295 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2296 | * buffer so that the user may free everything by simply calling free() |
2297 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2298 | * compatibility. |
2299 | * | |
56f0bc67 JG |
2300 | * A first pass is performed to compute the size of the buffer that |
2301 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2302 | * the returned events so that their members always point within the |
2303 | * buffer. | |
2304 | * | |
2305 | * The layout of the returned buffer is as follows: | |
2306 | * - struct lttng_event[nb_events], | |
2307 | * - nb_events times the following: | |
2308 | * - struct lttng_event_extended, | |
2309 | * - flattened version of userspace_probe_location | |
2310 | * - filter_expression | |
2311 | * - exclusions | |
2312 | * - padding to align to 64-bits | |
2313 | */ | |
2314 | comm_ext_at = reception_buffer + | |
2315 | (nb_events * sizeof(struct lttng_event)); | |
2316 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
2317 | |
2318 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
2319 | struct lttcomm_event_extended_header *ext_comm = |
2320 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 2321 | int probe_storage_req = 0; |
b4e3ceb9 | 2322 | |
de453daa JG |
2323 | comm_ext_at += sizeof(*ext_comm); |
2324 | comm_ext_at += ext_comm->filter_len; | |
2325 | comm_ext_at += | |
2326 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2327 | ||
56f0bc67 JG |
2328 | if (ext_comm->userspace_probe_location_len) { |
2329 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2330 | struct lttng_buffer_view probe_location_view; | |
2331 | ||
2332 | probe_location_view = lttng_buffer_view_init( | |
2333 | comm_ext_at, 0, | |
2334 | ext_comm->userspace_probe_location_len); | |
2335 | ||
2336 | /* | |
2337 | * Create a temporary userspace probe location to | |
2338 | * determine the size needed by a "flattened" version | |
2339 | * of that same probe location. | |
2340 | */ | |
2341 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2342 | &probe_location_view, &probe_location); | |
2343 | if (ret < 0) { | |
2344 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2345 | goto end; | |
2346 | } | |
2347 | ||
2348 | ret = lttng_userspace_probe_location_flatten( | |
2349 | probe_location, NULL); | |
2350 | lttng_userspace_probe_location_destroy(probe_location); | |
2351 | if (ret < 0) { | |
2352 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2353 | goto end; | |
2354 | } | |
2355 | ||
2356 | probe_storage_req = ret; | |
2357 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2358 | } |
2359 | ||
de453daa | 2360 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2361 | storage_req += ext_comm->filter_len; |
2362 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2363 | /* Padding to ensure the flat probe is aligned. */ |
2364 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2365 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2366 | } |
2367 | ||
56f0bc67 JG |
2368 | lttng_dynamic_buffer_init(&listing); |
2369 | /* | |
2370 | * We must ensure that "listing" is never resized so as to preserve | |
2371 | * the validity of the flattened objects. | |
2372 | */ | |
2373 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2374 | if (ret) { | |
2375 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2376 | goto end; |
2377 | } | |
56f0bc67 JG |
2378 | |
2379 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2380 | nb_events * sizeof(struct lttng_event)); | |
2381 | if (ret) { | |
2382 | ret = -LTTNG_ERR_NOMEM; | |
2383 | goto free_dynamic_buffer; | |
2384 | } | |
de453daa JG |
2385 | |
2386 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2387 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2388 | for (i = 0; i < nb_events; i++) { |
2389 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2390 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2391 | struct lttcomm_event_extended_header *ext_comm = |
2392 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2393 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2394 | (struct lttng_event_extended *) |
2395 | (listing.data + listing.size); | |
de453daa | 2396 | |
56f0bc67 JG |
2397 | /* Insert struct lttng_event_extended. */ |
2398 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2399 | listing.size + sizeof(*event_extended)); | |
2400 | if (ret) { | |
2401 | ret = -LTTNG_ERR_NOMEM; | |
2402 | goto free_dynamic_buffer; | |
2403 | } | |
de453daa | 2404 | event->extended.ptr = event_extended; |
56f0bc67 | 2405 | |
de453daa JG |
2406 | comm_ext_at += sizeof(*ext_comm); |
2407 | ||
56f0bc67 JG |
2408 | /* Insert filter expression. */ |
2409 | if (ext_comm->filter_len) { | |
2410 | event_extended->filter_expression = listing.data + | |
2411 | listing.size; | |
2412 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2413 | ext_comm->filter_len); | |
2414 | if (ret) { | |
2415 | ret = -LTTNG_ERR_NOMEM; | |
2416 | goto free_dynamic_buffer; | |
2417 | } | |
2418 | comm_ext_at += ext_comm->filter_len; | |
2419 | } | |
2420 | ||
2421 | /* Insert exclusions. */ | |
2422 | if (ext_comm->nb_exclusions) { | |
2423 | event_extended->exclusions.count = | |
2424 | ext_comm->nb_exclusions; | |
2425 | event_extended->exclusions.strings = | |
2426 | listing.data + listing.size; | |
2427 | ||
2428 | ret = lttng_dynamic_buffer_append(&listing, | |
2429 | comm_ext_at, | |
2430 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2431 | if (ret) { | |
2432 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2433 | goto free_dynamic_buffer; |
56f0bc67 JG |
2434 | } |
2435 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2436 | } | |
2437 | ||
2438 | /* Insert padding to align to 64-bits. */ | |
2439 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2440 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2441 | if (ret) { | |
2442 | ret = -LTTNG_ERR_NOMEM; | |
2443 | goto free_dynamic_buffer; | |
2444 | } | |
2445 | ||
2446 | /* Insert flattened userspace probe location. */ | |
2447 | if (ext_comm->userspace_probe_location_len) { | |
2448 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2449 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2450 | |
56f0bc67 JG |
2451 | probe_location_view = lttng_buffer_view_init( |
2452 | comm_ext_at, 0, | |
2453 | ext_comm->userspace_probe_location_len); | |
de453daa | 2454 | |
56f0bc67 JG |
2455 | ret = lttng_userspace_probe_location_create_from_buffer( |
2456 | &probe_location_view, &probe_location); | |
2457 | if (ret < 0) { | |
2458 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2459 | goto free_dynamic_buffer; | |
2460 | } | |
2461 | ||
2462 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2463 | (listing.data + listing.size); | |
2464 | ret = lttng_userspace_probe_location_flatten( | |
2465 | probe_location, &listing); | |
2466 | lttng_userspace_probe_location_destroy(probe_location); | |
2467 | if (ret < 0) { | |
2468 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2469 | goto free_dynamic_buffer; | |
2470 | } | |
2471 | ||
2472 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2473 | } | |
de453daa JG |
2474 | } |
2475 | ||
56f0bc67 JG |
2476 | /* Don't reset listing buffer as we return its content. */ |
2477 | *events = (struct lttng_event *) listing.data; | |
2478 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2479 | ret = (int) nb_events; |
56f0bc67 JG |
2480 | free_dynamic_buffer: |
2481 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2482 | end: |
b4e3ceb9 | 2483 | free(cmd_header); |
de453daa | 2484 | free(reception_buffer); |
b4e3ceb9 | 2485 | return ret; |
9f19cc17 DG |
2486 | } |
2487 | ||
fac6795d | 2488 | /* |
1c8d13c8 TD |
2489 | * Sets the tracing_group variable with name. |
2490 | * This function allocates memory pointed to by tracing_group. | |
2491 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2492 | */ |
2493 | int lttng_set_tracing_group(const char *name) | |
2494 | { | |
9d697d3d | 2495 | if (name == NULL) { |
2f70b271 | 2496 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2497 | } |
2498 | ||
fac6795d | 2499 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2500 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2501 | } |
2502 | ||
2503 | return 0; | |
2504 | } | |
2505 | ||
cd80958d | 2506 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2507 | struct lttng_calibrate *calibrate) |
2508 | { | |
b812e5ca PP |
2509 | /* |
2510 | * This command was removed in LTTng 2.9. | |
2511 | */ | |
2512 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2513 | } |
2514 | ||
5edd7e09 DG |
2515 | /* |
2516 | * Set default channel attributes. | |
441c16a7 | 2517 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2518 | */ |
2519 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2520 | struct lttng_channel_attr *attr) | |
2521 | { | |
294851b0 | 2522 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2523 | |
5edd7e09 DG |
2524 | /* Safety check */ |
2525 | if (attr == NULL || domain == NULL) { | |
2526 | return; | |
2527 | } | |
2528 | ||
294851b0 | 2529 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2530 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2531 | ||
0a9c6494 DG |
2532 | /* Same for all domains. */ |
2533 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2534 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2535 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2536 | ||
5edd7e09 DG |
2537 | switch (domain->type) { |
2538 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2539 | attr->switch_timer_interval = |
2540 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2541 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2542 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2543 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2544 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2545 | if (extended) { |
2546 | extended->monitor_timer_interval = | |
2547 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2548 | extended->blocking_timeout = |
2549 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2550 | } |
5edd7e09 DG |
2551 | break; |
2552 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2553 | switch (domain->buf_type) { |
2554 | case LTTNG_BUFFER_PER_UID: | |
2555 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2556 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2557 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2558 | attr->switch_timer_interval = |
2559 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2560 | attr->read_timer_interval = | |
2561 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2562 | if (extended) { |
2563 | extended->monitor_timer_interval = | |
2564 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2565 | extended->blocking_timeout = |
2566 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2567 | } |
0a9c6494 DG |
2568 | break; |
2569 | case LTTNG_BUFFER_PER_PID: | |
2570 | default: | |
2571 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2572 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2573 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2574 | attr->switch_timer_interval = |
2575 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2576 | attr->read_timer_interval = | |
2577 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2578 | if (extended) { |
2579 | extended->monitor_timer_interval = | |
2580 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2581 | extended->blocking_timeout = |
2582 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2583 | } |
0a9c6494 DG |
2584 | break; |
2585 | } | |
5edd7e09 | 2586 | default: |
441c16a7 | 2587 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2588 | break; |
2589 | } | |
cf0bcb51 JG |
2590 | |
2591 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2592 | } |
2593 | ||
5ba3702f JG |
2594 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2595 | uint64_t *discarded_events) | |
2596 | { | |
2597 | int ret = 0; | |
cf0bcb51 | 2598 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2599 | |
2600 | if (!channel || !discarded_events) { | |
2601 | ret = -LTTNG_ERR_INVALID; | |
2602 | goto end; | |
2603 | } | |
2604 | ||
2605 | chan_ext = channel->attr.extended.ptr; | |
2606 | if (!chan_ext) { | |
2607 | /* | |
2608 | * This can happen since the lttng_channel structure is | |
2609 | * used for other tasks where this pointer is never set. | |
2610 | */ | |
2611 | *discarded_events = 0; | |
2612 | goto end; | |
2613 | } | |
2614 | ||
2615 | *discarded_events = chan_ext->discarded_events; | |
2616 | end: | |
2617 | return ret; | |
2618 | } | |
2619 | ||
2620 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2621 | uint64_t *lost_packets) | |
2622 | { | |
2623 | int ret = 0; | |
cf0bcb51 | 2624 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2625 | |
2626 | if (!channel || !lost_packets) { | |
2627 | ret = -LTTNG_ERR_INVALID; | |
2628 | goto end; | |
2629 | } | |
2630 | ||
2631 | chan_ext = channel->attr.extended.ptr; | |
2632 | if (!chan_ext) { | |
2633 | /* | |
2634 | * This can happen since the lttng_channel structure is | |
2635 | * used for other tasks where this pointer is never set. | |
2636 | */ | |
2637 | *lost_packets = 0; | |
2638 | goto end; | |
2639 | } | |
2640 | ||
2641 | *lost_packets = chan_ext->lost_packets; | |
2642 | end: | |
2643 | return ret; | |
2644 | } | |
2645 | ||
cf0bcb51 JG |
2646 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2647 | uint64_t *monitor_timer_interval) | |
2648 | { | |
2649 | int ret = 0; | |
2650 | ||
2651 | if (!chan || !monitor_timer_interval) { | |
2652 | ret = -LTTNG_ERR_INVALID; | |
2653 | goto end; | |
2654 | } | |
2655 | ||
2656 | if (!chan->attr.extended.ptr) { | |
2657 | ret = -LTTNG_ERR_INVALID; | |
2658 | goto end; | |
2659 | } | |
2660 | ||
2661 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2662 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2663 | end: | |
2664 | return ret; | |
2665 | } | |
2666 | ||
2667 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2668 | uint64_t monitor_timer_interval) | |
2669 | { | |
2670 | int ret = 0; | |
2671 | ||
2672 | if (!chan || !chan->attr.extended.ptr) { | |
2673 | ret = -LTTNG_ERR_INVALID; | |
2674 | goto end; | |
2675 | } | |
2676 | ||
2677 | ((struct lttng_channel_extended *) | |
2678 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2679 | monitor_timer_interval; | |
2680 | end: | |
2681 | return ret; | |
2682 | } | |
2683 | ||
491d1539 MD |
2684 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2685 | int64_t *blocking_timeout) | |
2686 | { | |
2687 | int ret = 0; | |
2688 | ||
2689 | if (!chan || !blocking_timeout) { | |
2690 | ret = -LTTNG_ERR_INVALID; | |
2691 | goto end; | |
2692 | } | |
2693 | ||
2694 | if (!chan->attr.extended.ptr) { | |
2695 | ret = -LTTNG_ERR_INVALID; | |
2696 | goto end; | |
2697 | } | |
2698 | ||
2699 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2700 | chan->attr.extended.ptr)->blocking_timeout; | |
2701 | end: | |
2702 | return ret; | |
2703 | } | |
2704 | ||
2705 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2706 | int64_t blocking_timeout) | |
2707 | { | |
2708 | int ret = 0; | |
2709 | int64_t msec_timeout; | |
2710 | ||
2711 | if (!chan || !chan->attr.extended.ptr) { | |
2712 | ret = -LTTNG_ERR_INVALID; | |
2713 | goto end; | |
2714 | } | |
2715 | ||
2716 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2717 | ret = -LTTNG_ERR_INVALID; | |
2718 | goto end; | |
2719 | } | |
2720 | ||
2721 | /* | |
2722 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2723 | * us to accept a narrower range of values (msecs expressed as a signed | |
2724 | * 32-bit integer). | |
2725 | */ | |
2726 | msec_timeout = blocking_timeout / 1000; | |
2727 | if (msec_timeout != (int32_t) msec_timeout) { | |
2728 | ret = -LTTNG_ERR_INVALID; | |
2729 | goto end; | |
2730 | } | |
2731 | ||
2732 | ((struct lttng_channel_extended *) | |
2733 | chan->attr.extended.ptr)->blocking_timeout = | |
2734 | blocking_timeout; | |
2735 | end: | |
2736 | return ret; | |
2737 | } | |
2738 | ||
fac6795d | 2739 | /* |
2269e89e | 2740 | * Check if session daemon is alive. |
fac6795d | 2741 | * |
2269e89e | 2742 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2743 | * On error returns a negative value. |
fac6795d | 2744 | */ |
947308c4 | 2745 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2746 | { |
2747 | int ret; | |
2748 | ||
2749 | ret = set_session_daemon_path(); | |
2750 | if (ret < 0) { | |
9ae110e2 | 2751 | /* Error. */ |
fac6795d DG |
2752 | return ret; |
2753 | } | |
2754 | ||
9d035200 | 2755 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2756 | /* |
9ae110e2 JG |
2757 | * No socket path set. Weird error which means the constructor |
2758 | * was not called. | |
2f70b271 DG |
2759 | */ |
2760 | assert(0); | |
fac6795d DG |
2761 | } |
2762 | ||
2269e89e | 2763 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2764 | if (ret < 0) { |
9ae110e2 | 2765 | /* Not alive. */ |
7d8234d9 MD |
2766 | return 0; |
2767 | } | |
7d8234d9 | 2768 | |
9ae110e2 | 2769 | /* Is alive. */ |
947308c4 | 2770 | return 1; |
fac6795d DG |
2771 | } |
2772 | ||
00e2e675 | 2773 | /* |
a4b92340 | 2774 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2775 | * |
2776 | * Return 0 on success, else a negative value. | |
2777 | */ | |
a4b92340 DG |
2778 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2779 | const char *control_url, const char *data_url) | |
00e2e675 | 2780 | { |
3dd05a85 | 2781 | int ret; |
a4b92340 | 2782 | ssize_t size; |
00e2e675 | 2783 | struct lttcomm_session_msg lsm; |
a4b92340 | 2784 | struct lttng_uri *uris = NULL; |
00e2e675 | 2785 | |
a4b92340 | 2786 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2787 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2788 | } |
2789 | ||
a4b92340 DG |
2790 | memset(&lsm, 0, sizeof(lsm)); |
2791 | ||
00e2e675 DG |
2792 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2793 | ||
cac3069d | 2794 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2795 | sizeof(lsm.session.name)); |
67040e31 | 2796 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2797 | |
bc894455 | 2798 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2799 | if (size < 0) { |
2f70b271 | 2800 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2801 | } |
2802 | ||
2803 | lsm.u.uri.size = size; | |
00e2e675 | 2804 | |
795a978d | 2805 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2806 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2807 | |
2808 | free(uris); | |
2809 | return ret; | |
00e2e675 DG |
2810 | } |
2811 | ||
2812 | /* | |
9c6bda17 | 2813 | * [OBSOLETE] |
00e2e675 DG |
2814 | */ |
2815 | int lttng_enable_consumer(struct lttng_handle *handle) | |
2816 | { | |
785d2d0d | 2817 | return -ENOSYS; |
00e2e675 DG |
2818 | } |
2819 | ||
2820 | /* | |
9c6bda17 | 2821 | * [OBSOLETE] |
00e2e675 DG |
2822 | */ |
2823 | int lttng_disable_consumer(struct lttng_handle *handle) | |
2824 | { | |
785d2d0d | 2825 | return -ENOSYS; |
00e2e675 DG |
2826 | } |
2827 | ||
07424f16 | 2828 | /* |
5feee503 | 2829 | * [OBSOLETE] |
07424f16 DG |
2830 | */ |
2831 | int _lttng_create_session_ext(const char *name, const char *url, | |
2832 | const char *datetime) | |
2833 | { | |
5feee503 | 2834 | return -ENOSYS; |
07424f16 DG |
2835 | } |
2836 | ||
806e2684 DG |
2837 | /* |
2838 | * For a given session name, this call checks if the data is ready to be read | |
2839 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2840 | * any readers. | |
2841 | */ | |
6d805429 | 2842 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2843 | { |
2844 | int ret; | |
2845 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2846 | uint8_t *pending = NULL; |
806e2684 DG |
2847 | |
2848 | if (session_name == NULL) { | |
2849 | return -LTTNG_ERR_INVALID; | |
2850 | } | |
2851 | ||
53efb85a | 2852 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2853 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2854 | |
cac3069d DG |
2855 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2856 | sizeof(lsm.session.name)); | |
806e2684 | 2857 | |
f6151c55 JG |
2858 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2859 | if (ret < 0) { | |
2860 | goto end; | |
2861 | } else if (ret != 1) { | |
2862 | /* Unexpected payload size */ | |
2863 | ret = -LTTNG_ERR_INVALID; | |
2864 | goto end; | |
203cfe5a JG |
2865 | } else if (!pending) { |
2866 | /* Internal error. */ | |
2867 | ret = -LTTNG_ERR_UNK; | |
2868 | goto end; | |
806e2684 DG |
2869 | } |
2870 | ||
f6151c55 JG |
2871 | ret = (int) *pending; |
2872 | end: | |
2873 | free(pending); | |
806e2684 DG |
2874 | return ret; |
2875 | } | |
2876 | ||
a5dfbb9d MD |
2877 | /* |
2878 | * List PIDs in the tracker. | |
2879 | * | |
1b18ce93 JG |
2880 | * enabled is set to whether the PID tracker is enabled. |
2881 | * pids is set to an allocated array of PIDs currently tracked. On | |
2882 | * success, pids must be freed by the caller. | |
2883 | * nr_pids is set to the number of entries contained by the pids array. | |
a5dfbb9d MD |
2884 | * |
2885 | * Returns 0 on success, else a negative LTTng error code. | |
2886 | */ | |
2887 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2888 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2889 | { | |
ebbf5ab7 JR |
2890 | int ret; |
2891 | int enabled = 1; | |
a5dfbb9d MD |
2892 | struct lttcomm_session_msg lsm; |
2893 | size_t nr_pids; | |
ff75c11e | 2894 | int32_t *pids = NULL; |
a5dfbb9d MD |
2895 | |
2896 | if (handle == NULL) { | |
2897 | return -LTTNG_ERR_INVALID; | |
2898 | } | |
2899 | ||
2900 | memset(&lsm, 0, sizeof(lsm)); | |
2901 | lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS; | |
2902 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
2903 | sizeof(lsm.session.name)); | |
67040e31 | 2904 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
a5dfbb9d MD |
2905 | |
2906 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids); | |
2907 | if (ret < 0) { | |
2908 | return ret; | |
2909 | } | |
2910 | nr_pids = ret / sizeof(int32_t); | |
de8218d4 JG |
2911 | if (nr_pids > 0 && !pids) { |
2912 | return -LTTNG_ERR_UNK; | |
2913 | } | |
a5dfbb9d MD |
2914 | if (nr_pids == 1 && pids[0] == -1) { |
2915 | free(pids); | |
2916 | pids = NULL; | |
2917 | enabled = 0; | |
2918 | nr_pids = 0; | |
2919 | } | |
2920 | *_enabled = enabled; | |
2921 | *_pids = pids; | |
2922 | *_nr_pids = nr_pids; | |
2923 | return 0; | |
2924 | } | |
2925 | ||
93ec662e JD |
2926 | /* |
2927 | * Regenerate the metadata for a session. | |
2928 | * Return 0 on success, a negative error code on error. | |
2929 | */ | |
eded6438 | 2930 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2931 | { |
2932 | int ret; | |
2933 | struct lttcomm_session_msg lsm; | |
2934 | ||
2935 | if (!session_name) { | |
2936 | ret = -LTTNG_ERR_INVALID; | |
2937 | goto end; | |
2938 | } | |
2939 | ||
2940 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2941 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
2942 | |
2943 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2944 | sizeof(lsm.session.name)); | |
2945 | ||
2946 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2947 | if (ret < 0) { | |
2948 | goto end; | |
2949 | } | |
2950 | ||
2951 | ret = 0; | |
2952 | end: | |
2953 | return ret; | |
2954 | } | |
2955 | ||
eded6438 JD |
2956 | /* |
2957 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2958 | */ | |
2959 | int lttng_metadata_regenerate(const char *session_name) | |
2960 | { | |
2961 | return lttng_regenerate_metadata(session_name); | |
2962 | } | |
2963 | ||
c2561365 JD |
2964 | /* |
2965 | * Regenerate the statedump of a session. | |
2966 | * Return 0 on success, a negative error code on error. | |
2967 | */ | |
2968 | int lttng_regenerate_statedump(const char *session_name) | |
2969 | { | |
2970 | int ret; | |
2971 | struct lttcomm_session_msg lsm; | |
2972 | ||
2973 | if (!session_name) { | |
2974 | ret = -LTTNG_ERR_INVALID; | |
2975 | goto end; | |
2976 | } | |
2977 | ||
2978 | memset(&lsm, 0, sizeof(lsm)); | |
2979 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2980 | ||
2981 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2982 | sizeof(lsm.session.name)); | |
2983 | ||
2984 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2985 | if (ret < 0) { | |
2986 | goto end; | |
2987 | } | |
2988 | ||
2989 | ret = 0; | |
2990 | end: | |
2991 | return ret; | |
2992 | } | |
2993 | ||
a58c490f JG |
2994 | int lttng_register_trigger(struct lttng_trigger *trigger) |
2995 | { | |
2996 | int ret; | |
2997 | struct lttcomm_session_msg lsm; | |
3647288f | 2998 | struct lttng_dynamic_buffer buffer; |
a58c490f | 2999 | |
3647288f | 3000 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3001 | if (!trigger) { |
3002 | ret = -LTTNG_ERR_INVALID; | |
3003 | goto end; | |
3004 | } | |
3005 | ||
3006 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 3007 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3008 | goto end; |
3009 | } | |
3010 | ||
3647288f JG |
3011 | ret = lttng_trigger_serialize(trigger, &buffer); |
3012 | if (ret < 0) { | |
a58c490f JG |
3013 | ret = -LTTNG_ERR_UNK; |
3014 | goto end; | |
3015 | } | |
3016 | ||
a58c490f JG |
3017 | memset(&lsm, 0, sizeof(lsm)); |
3018 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
3019 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3020 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3021 | buffer.size, NULL); | |
a58c490f | 3022 | end: |
3647288f | 3023 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3024 | return ret; |
3025 | } | |
3026 | ||
3027 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
3028 | { | |
3029 | int ret; | |
3030 | struct lttcomm_session_msg lsm; | |
3647288f | 3031 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3032 | |
3647288f | 3033 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3034 | if (!trigger) { |
3035 | ret = -LTTNG_ERR_INVALID; | |
3036 | goto end; | |
3037 | } | |
3038 | ||
3039 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 3040 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3041 | goto end; |
3042 | } | |
3043 | ||
3647288f JG |
3044 | ret = lttng_trigger_serialize(trigger, &buffer); |
3045 | if (ret < 0) { | |
a58c490f JG |
3046 | ret = -LTTNG_ERR_UNK; |
3047 | goto end; | |
3048 | } | |
3049 | ||
a58c490f JG |
3050 | memset(&lsm, 0, sizeof(lsm)); |
3051 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
3052 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3053 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3054 | buffer.size, NULL); | |
a58c490f | 3055 | end: |
3647288f | 3056 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3057 | return ret; |
3058 | } | |
3059 | ||
fac6795d | 3060 | /* |
9ae110e2 | 3061 | * lib constructor. |
fac6795d | 3062 | */ |
b2b89e8a | 3063 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3064 | { |
3065 | /* Set default session group */ | |
bbccc3d2 | 3066 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3067 | } |
49cca668 DG |
3068 | |
3069 | /* | |
9ae110e2 | 3070 | * lib destructor. |
49cca668 | 3071 | */ |
b2b89e8a | 3072 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3073 | { |
3074 | free(tracing_group); | |
3075 | } |