Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
90c106c6 | 6 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa | 7 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
ab5be9fa | 9 | * SPDX-License-Identifier: LGPL-2.1-only |
82a3637f | 10 | * |
fac6795d DG |
11 | */ |
12 | ||
6c1c0768 | 13 | #define _LGPL_SOURCE |
44a5e5eb | 14 | #include <assert.h> |
fac6795d DG |
15 | #include <grp.h> |
16 | #include <stdio.h> | |
17 | #include <stdlib.h> | |
d72eb77f | 18 | #include <stdint.h> |
fac6795d DG |
19 | #include <string.h> |
20 | #include <unistd.h> | |
21 | ||
0ae3cfc6 | 22 | #include <common/bytecode/bytecode.h> |
990570ed | 23 | #include <common/common.h> |
edf4b93e | 24 | #include <common/compat/errno.h> |
15e37663 | 25 | #include <common/compat/string.h> |
990570ed | 26 | #include <common/defaults.h> |
fe489250 | 27 | #include <common/dynamic-array.h> |
b99a0cb3 | 28 | #include <common/dynamic-buffer.h> |
9e620ea7 | 29 | #include <common/payload-view.h> |
b99a0cb3 | 30 | #include <common/payload.h> |
db758600 | 31 | #include <common/sessiond-comm/sessiond-comm.h> |
159b042f | 32 | #include <common/tracker.h> |
fe489250 | 33 | #include <common/unix.h> |
a4b92340 | 34 | #include <common/uri.h> |
feb0f3e5 | 35 | #include <common/utils.h> |
a58c490f | 36 | #include <lttng/channel-internal.h> |
159b042f JG |
37 | #include <lttng/destruction-handle.h> |
38 | #include <lttng/endpoint.h> | |
b99a0cb3 | 39 | #include <lttng/error-query-internal.h> |
de453daa | 40 | #include <lttng/event-internal.h> |
159b042f | 41 | #include <lttng/health-internal.h> |
b99a0cb3 | 42 | #include <lttng/lttng-error.h> |
159b042f | 43 | #include <lttng/lttng.h> |
b178f53e | 44 | #include <lttng/session-descriptor-internal.h> |
159b042f JG |
45 | #include <lttng/session-internal.h> |
46 | #include <lttng/trigger/trigger-internal.h> | |
47 | #include <lttng/userspace-probe-internal.h> | |
fac6795d | 48 | |
b99a0cb3 | 49 | #include "lttng-ctl-helper.h" |
e4d2f27a JR |
50 | #include <common/filter/filter-ast.h> |
51 | #include <common/filter/filter-parser.h> | |
e4d2f27a | 52 | #include <common/filter/memstream.h> |
53a80697 | 53 | |
60160d2a JG |
54 | #define COPY_DOMAIN_PACKED(dst, src) \ |
55 | do { \ | |
56 | struct lttng_domain _tmp_domain; \ | |
57 | \ | |
58 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
59 | dst = _tmp_domain; \ | |
60 | } while (0) | |
53a80697 | 61 | |
fac6795d | 62 | /* Socket to session daemon for communication */ |
3e3665b8 | 63 | static int sessiond_socket = -1; |
fac6795d DG |
64 | static char sessiond_sock_path[PATH_MAX]; |
65 | ||
fac6795d DG |
66 | /* Variables */ |
67 | static char *tracing_group; | |
68 | static int connected; | |
69 | ||
97e19046 DG |
70 | /* Global */ |
71 | ||
72 | /* | |
73 | * Those two variables are used by error.h to silent or control the verbosity of | |
74 | * error message. They are global to the library so application linking with it | |
75 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
76 | */ |
77 | int lttng_opt_quiet; | |
78 | int lttng_opt_verbose; | |
c7e35b03 | 79 | int lttng_opt_mi; |
97e19046 | 80 | |
fac6795d | 81 | /* |
cd80958d | 82 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 83 | * |
cd80958d DG |
84 | * If domain is unknown, default domain will be the kernel. |
85 | */ | |
cac3069d DG |
86 | LTTNG_HIDDEN |
87 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
88 | struct lttng_domain *src) | |
cd80958d DG |
89 | { |
90 | if (src && dst) { | |
91 | switch (src->type) { | |
00e2e675 DG |
92 | case LTTNG_DOMAIN_KERNEL: |
93 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 94 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 95 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 96 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
97 | memcpy(dst, src, sizeof(struct lttng_domain)); |
98 | break; | |
99 | default: | |
100 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 101 | break; |
cd80958d DG |
102 | } |
103 | } | |
104 | } | |
105 | ||
106 | /* | |
107 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 108 | * |
1c8d13c8 TD |
109 | * On success, returns the number of bytes sent (>=0) |
110 | * On error, returns -1 | |
fac6795d | 111 | */ |
cd80958d | 112 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
113 | { |
114 | int ret; | |
115 | ||
116 | if (!connected) { | |
2f70b271 | 117 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 118 | goto end; |
fac6795d DG |
119 | } |
120 | ||
19f912db FD |
121 | DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str(lsm->cmd_type), |
122 | lsm->cmd_type); | |
a4b92340 | 123 | |
be040666 | 124 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 125 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
126 | if (ret < 0) { |
127 | ret = -LTTNG_ERR_FATAL; | |
128 | } | |
e065084a DG |
129 | |
130 | end: | |
131 | return ret; | |
132 | } | |
133 | ||
53a80697 MD |
134 | /* |
135 | * Send var len data to the session daemon. | |
136 | * | |
137 | * On success, returns the number of bytes sent (>=0) | |
138 | * On error, returns -1 | |
139 | */ | |
c2d69327 | 140 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
141 | { |
142 | int ret; | |
143 | ||
144 | if (!connected) { | |
2f70b271 | 145 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
146 | goto end; |
147 | } | |
a4b92340 | 148 | |
53a80697 MD |
149 | if (!data || !len) { |
150 | ret = 0; | |
151 | goto end; | |
152 | } | |
153 | ||
154 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
155 | if (ret < 0) { |
156 | ret = -LTTNG_ERR_FATAL; | |
157 | } | |
53a80697 MD |
158 | |
159 | end: | |
160 | return ret; | |
161 | } | |
162 | ||
a04d53fc FD |
163 | /* |
164 | * Send file descriptors to the session daemon. | |
165 | * | |
166 | * On success, returns the number of bytes sent (>=0) | |
167 | * On error, returns -1 | |
168 | */ | |
169 | static int send_session_fds(const int *fds, size_t nb_fd) | |
170 | { | |
171 | int ret; | |
172 | ||
173 | if (!connected) { | |
174 | ret = -LTTNG_ERR_NO_SESSIOND; | |
175 | goto end; | |
176 | } | |
177 | ||
178 | if (!fds || !nb_fd) { | |
179 | ret = 0; | |
180 | goto end; | |
181 | } | |
182 | ||
183 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
184 | if (ret < 0) { | |
185 | ret = -LTTNG_ERR_FATAL; | |
186 | } | |
187 | ||
188 | end: | |
189 | return ret; | |
190 | } | |
191 | ||
e065084a | 192 | /* |
cd80958d | 193 | * Receive data from the sessiond socket. |
e065084a | 194 | * |
1c8d13c8 | 195 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 196 | * On error, returns a negative lttng_error_code. |
e065084a | 197 | */ |
ca95a216 | 198 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
199 | { |
200 | int ret; | |
201 | ||
bacc41cc FD |
202 | assert(len > 0); |
203 | ||
e065084a | 204 | if (!connected) { |
2f70b271 | 205 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 206 | goto end; |
fac6795d DG |
207 | } |
208 | ||
ca95a216 | 209 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
210 | if (ret < 0) { |
211 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
212 | } else if (ret == 0) { |
213 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 214 | } |
fac6795d | 215 | |
e065084a | 216 | end: |
fac6795d DG |
217 | return ret; |
218 | } | |
219 | ||
e368fb43 JG |
220 | /* |
221 | * Receive a payload from the session daemon by appending to an existing | |
222 | * payload. | |
223 | * On success, returns the number of bytes received (>=0) | |
224 | * On error, returns a negative lttng_error_code. | |
225 | */ | |
226 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
227 | { | |
228 | int ret; | |
229 | const size_t original_payload_size = payload->buffer.size; | |
230 | ||
231 | ret = lttng_dynamic_buffer_set_size( | |
232 | &payload->buffer, payload->buffer.size + len); | |
233 | if (ret) { | |
234 | ret = -LTTNG_ERR_NOMEM; | |
235 | goto end; | |
236 | } | |
237 | ||
238 | ret = recv_data_sessiond( | |
239 | payload->buffer.data + original_payload_size, len); | |
240 | end: | |
241 | return ret; | |
242 | } | |
243 | ||
fac6795d | 244 | /* |
9ae110e2 | 245 | * Check if we are in the specified group. |
65beb5ff | 246 | * |
9ae110e2 | 247 | * If yes return 1, else return -1. |
947308c4 | 248 | */ |
6c71277b MD |
249 | LTTNG_HIDDEN |
250 | int lttng_check_tracing_group(void) | |
947308c4 | 251 | { |
28ab59d0 | 252 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
253 | int grp_list_size, grp_id, i; |
254 | int ret = -1; | |
6c71277b | 255 | const char *grp_name = tracing_group; |
947308c4 DG |
256 | |
257 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 258 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 259 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
260 | goto end; |
261 | } | |
262 | ||
263 | /* Get number of supplementary group IDs */ | |
264 | grp_list_size = getgroups(0, NULL); | |
265 | if (grp_list_size < 0) { | |
6f04ed72 | 266 | PERROR("getgroups"); |
947308c4 DG |
267 | goto end; |
268 | } | |
269 | ||
270 | /* Alloc group list of the right size */ | |
3f451dc0 | 271 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 272 | if (!grp_list) { |
6f04ed72 | 273 | PERROR("malloc"); |
00795392 MD |
274 | goto end; |
275 | } | |
947308c4 | 276 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 277 | if (grp_id < 0) { |
6f04ed72 | 278 | PERROR("getgroups"); |
947308c4 DG |
279 | goto free_list; |
280 | } | |
281 | ||
282 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 283 | if (grp_list[i] == tracing_gid) { |
2269e89e | 284 | ret = 1; |
947308c4 DG |
285 | break; |
286 | } | |
287 | } | |
288 | ||
289 | free_list: | |
290 | free(grp_list); | |
291 | ||
292 | end: | |
293 | return ret; | |
294 | } | |
295 | ||
d72eb77f JR |
296 | static enum lttng_error_code check_enough_available_memory( |
297 | uint64_t num_bytes_requested_per_cpu) | |
09b72f7a FD |
298 | { |
299 | int ret; | |
d72eb77f | 300 | enum lttng_error_code ret_code; |
09b72f7a | 301 | long num_cpu; |
d72eb77f JR |
302 | uint64_t best_mem_info; |
303 | uint64_t num_bytes_requested_total; | |
09b72f7a FD |
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) { | |
d72eb77f JR |
311 | ret_code = LTTNG_ERR_FATAL; |
312 | goto end; | |
313 | } | |
314 | ||
315 | if (num_bytes_requested_per_cpu > UINT64_MAX / (uint64_t) num_cpu) { | |
316 | /* Overflow */ | |
317 | ret_code = LTTNG_ERR_OVERFLOW; | |
318 | goto end; | |
09b72f7a FD |
319 | } |
320 | ||
d72eb77f JR |
321 | num_bytes_requested_total = |
322 | num_bytes_requested_per_cpu * (uint64_t) num_cpu; | |
09b72f7a FD |
323 | |
324 | /* | |
325 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
326 | * reliable estimate we can get but it is only exposed by the kernel | |
327 | * since 3.14. (See Linux kernel commit: | |
328 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
329 | */ | |
330 | ret = utils_get_memory_available(&best_mem_info); | |
331 | if (ret >= 0) { | |
332 | goto success; | |
333 | } | |
334 | ||
335 | /* | |
336 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
337 | * is a sanity check for obvious user error. | |
338 | */ | |
339 | ret = utils_get_memory_total(&best_mem_info); | |
340 | if (ret >= 0) { | |
341 | goto success; | |
342 | } | |
343 | ||
d72eb77f JR |
344 | /* No valid source of information. */ |
345 | ret_code = LTTNG_ERR_NOMEM; | |
346 | goto end; | |
347 | ||
09b72f7a | 348 | success: |
d72eb77f JR |
349 | if (best_mem_info >= num_bytes_requested_total) { |
350 | ret_code = LTTNG_OK; | |
351 | } else { | |
352 | ret_code = LTTNG_ERR_NOMEM; | |
353 | } | |
354 | end: | |
355 | return ret_code; | |
09b72f7a FD |
356 | } |
357 | ||
947308c4 | 358 | /* |
2269e89e DG |
359 | * Try connect to session daemon with sock_path. |
360 | * | |
361 | * Return 0 on success, else -1 | |
362 | */ | |
363 | static int try_connect_sessiond(const char *sock_path) | |
364 | { | |
365 | int ret; | |
366 | ||
367 | /* If socket exist, we check if the daemon listens for connect. */ | |
368 | ret = access(sock_path, F_OK); | |
369 | if (ret < 0) { | |
370 | /* Not alive */ | |
2f70b271 | 371 | goto error; |
2269e89e DG |
372 | } |
373 | ||
374 | ret = lttcomm_connect_unix_sock(sock_path); | |
375 | if (ret < 0) { | |
9ae110e2 | 376 | /* Not alive. */ |
2f70b271 | 377 | goto error; |
2269e89e DG |
378 | } |
379 | ||
380 | ret = lttcomm_close_unix_sock(ret); | |
381 | if (ret < 0) { | |
6f04ed72 | 382 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
383 | } |
384 | ||
385 | return 0; | |
2f70b271 DG |
386 | |
387 | error: | |
388 | return -1; | |
2269e89e DG |
389 | } |
390 | ||
391 | /* | |
2f70b271 DG |
392 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
393 | * variable. | |
394 | * | |
395 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
396 | * is somehow too long or ENOMEM). | |
947308c4 DG |
397 | */ |
398 | static int set_session_daemon_path(void) | |
399 | { | |
9ae110e2 | 400 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
401 | uid_t uid; |
402 | ||
403 | uid = getuid(); | |
947308c4 | 404 | |
2269e89e DG |
405 | if (uid != 0) { |
406 | /* Are we in the tracing group ? */ | |
6c71277b | 407 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
408 | } |
409 | ||
adca10ef | 410 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 JG |
411 | const int ret = lttng_strncpy(sessiond_sock_path, |
412 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
413 | sizeof(sessiond_sock_path)); | |
414 | ||
415 | if (ret) { | |
416 | goto error; | |
417 | } | |
08a9c49f | 418 | } |
2269e89e | 419 | |
08a9c49f | 420 | if (uid != 0) { |
c617c0c6 MD |
421 | int ret; |
422 | ||
08a9c49f | 423 | if (in_tgroup) { |
9ae110e2 | 424 | /* Tracing group. */ |
08a9c49f TD |
425 | ret = try_connect_sessiond(sessiond_sock_path); |
426 | if (ret >= 0) { | |
427 | goto end; | |
2269e89e | 428 | } |
08a9c49f | 429 | /* Global session daemon not available... */ |
2269e89e | 430 | } |
08a9c49f TD |
431 | /* ...or not in tracing group (and not root), default */ |
432 | ||
433 | /* | |
9ae110e2 JG |
434 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
435 | * is too small; | |
436 | * With GNU C >= 2.1, snprintf returns the required size | |
437 | * (excluding closing null) | |
08a9c49f TD |
438 | */ |
439 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 440 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 441 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 442 | goto error; |
947308c4 | 443 | } |
947308c4 | 444 | } |
08a9c49f | 445 | end: |
947308c4 | 446 | return 0; |
2f70b271 DG |
447 | |
448 | error: | |
449 | return -1; | |
947308c4 DG |
450 | } |
451 | ||
65beb5ff | 452 | /* |
9ae110e2 | 453 | * Connect to the LTTng session daemon. |
65beb5ff | 454 | * |
3e3665b8 | 455 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 456 | */ |
3e3665b8 | 457 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
458 | { |
459 | int ret; | |
460 | ||
461 | ret = set_session_daemon_path(); | |
462 | if (ret < 0) { | |
2f70b271 | 463 | goto error; |
65beb5ff DG |
464 | } |
465 | ||
9ae110e2 | 466 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
467 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
468 | if (ret < 0) { | |
2f70b271 | 469 | goto error; |
65beb5ff DG |
470 | } |
471 | ||
3e3665b8 | 472 | return ret; |
2f70b271 DG |
473 | |
474 | error: | |
475 | return -1; | |
65beb5ff DG |
476 | } |
477 | ||
3e3665b8 JG |
478 | static void reset_global_sessiond_connection_state(void) |
479 | { | |
480 | sessiond_socket = -1; | |
481 | connected = 0; | |
482 | } | |
483 | ||
65beb5ff | 484 | /* |
1c8d13c8 | 485 | * Clean disconnect from the session daemon. |
9ae110e2 | 486 | * |
1c8d13c8 | 487 | * On success, return 0. On error, return -1. |
65beb5ff DG |
488 | */ |
489 | static int disconnect_sessiond(void) | |
490 | { | |
491 | int ret = 0; | |
492 | ||
493 | if (connected) { | |
494 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 495 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
496 | } |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
795a978d PP |
501 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
502 | size_t *user_len) | |
503 | { | |
504 | int ret = 0; | |
505 | void *buf = NULL; | |
506 | ||
507 | if (len) { | |
508 | if (!user_len) { | |
509 | ret = -LTTNG_ERR_INVALID; | |
510 | goto end; | |
511 | } | |
512 | ||
513 | buf = zmalloc(len); | |
514 | if (!buf) { | |
515 | ret = -ENOMEM; | |
516 | goto end; | |
517 | } | |
518 | ||
519 | ret = recv_data_sessiond(buf, len); | |
520 | if (ret < 0) { | |
521 | goto end; | |
522 | } | |
523 | ||
524 | if (!user_buf) { | |
525 | ret = -LTTNG_ERR_INVALID; | |
526 | goto end; | |
527 | } | |
528 | ||
529 | /* Move ownership of command header buffer to user. */ | |
530 | *user_buf = buf; | |
531 | buf = NULL; | |
532 | *user_len = len; | |
533 | } else { | |
534 | /* No command header. */ | |
535 | if (user_len) { | |
536 | *user_len = 0; | |
537 | } | |
538 | ||
539 | if (user_buf) { | |
540 | *user_buf = NULL; | |
541 | } | |
542 | } | |
543 | ||
544 | end: | |
545 | free(buf); | |
546 | return ret; | |
547 | } | |
548 | ||
35a6fdb7 | 549 | /* |
cd80958d | 550 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
551 | * Takes extra var. len. data and file descriptors as input to send to the |
552 | * session daemon. | |
65beb5ff | 553 | * |
af87c45a | 554 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 555 | */ |
cac3069d | 556 | LTTNG_HIDDEN |
a04d53fc FD |
557 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
558 | const int *fds, size_t nb_fd, const void *vardata, | |
559 | size_t vardata_len, void **user_payload_buf, | |
560 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
561 | { |
562 | int ret; | |
795a978d | 563 | size_t payload_len; |
cd80958d | 564 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
565 | |
566 | ret = connect_sessiond(); | |
567 | if (ret < 0) { | |
2f70b271 | 568 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 569 | goto end; |
3e3665b8 JG |
570 | } else { |
571 | sessiond_socket = ret; | |
572 | connected = 1; | |
65beb5ff DG |
573 | } |
574 | ||
cd80958d | 575 | ret = send_session_msg(lsm); |
65beb5ff | 576 | if (ret < 0) { |
2f70b271 | 577 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
578 | goto end; |
579 | } | |
53a80697 | 580 | /* Send var len data */ |
795a978d | 581 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 582 | if (ret < 0) { |
2f70b271 | 583 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
584 | goto end; |
585 | } | |
65beb5ff | 586 | |
a04d53fc FD |
587 | /* Send fds */ |
588 | ret = send_session_fds(fds, nb_fd); | |
589 | if (ret < 0) { | |
590 | /* Ret value is a valid lttng error code. */ | |
591 | goto end; | |
592 | } | |
593 | ||
65beb5ff DG |
594 | /* Get header from data transmission */ |
595 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
596 | if (ret < 0) { | |
2f70b271 | 597 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
598 | goto end; |
599 | } | |
600 | ||
601 | /* Check error code if OK */ | |
f73fabfd | 602 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
603 | ret = -llm.ret_code; |
604 | goto end; | |
605 | } | |
606 | ||
795a978d PP |
607 | /* Get command header from data transmission */ |
608 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
609 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 610 | if (ret < 0) { |
65beb5ff DG |
611 | goto end; |
612 | } | |
613 | ||
795a978d PP |
614 | /* Get payload from data transmission */ |
615 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
616 | &payload_len); | |
617 | if (ret < 0) { | |
83009e5e DG |
618 | goto end; |
619 | } | |
620 | ||
795a978d | 621 | ret = llm.data_size; |
65beb5ff DG |
622 | |
623 | end: | |
624 | disconnect_sessiond(); | |
625 | return ret; | |
626 | } | |
627 | ||
e368fb43 JG |
628 | LTTNG_HIDDEN |
629 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, | |
630 | struct lttng_payload *reply) | |
631 | { | |
632 | int ret; | |
633 | struct lttcomm_lttng_msg llm; | |
fe489250 | 634 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 JG |
635 | |
636 | assert(reply->buffer.size == 0); | |
fe489250 | 637 | assert(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); |
e368fb43 JG |
638 | |
639 | ret = connect_sessiond(); | |
640 | if (ret < 0) { | |
641 | ret = -LTTNG_ERR_NO_SESSIOND; | |
642 | goto end; | |
643 | } else { | |
644 | sessiond_socket = ret; | |
645 | connected = 1; | |
646 | } | |
647 | ||
648 | /* Send command to session daemon */ | |
649 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data, | |
650 | message->buffer.size); | |
651 | if (ret < 0) { | |
652 | ret = -LTTNG_ERR_FATAL; | |
653 | goto end; | |
654 | } | |
655 | ||
fe489250 JG |
656 | if (fd_count > 0) { |
657 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, | |
658 | message); | |
659 | if (ret < 0) { | |
660 | ret = -LTTNG_ERR_FATAL; | |
661 | goto end; | |
662 | } | |
e368fb43 JG |
663 | } |
664 | ||
665 | /* Get header from data transmission */ | |
666 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
667 | if (ret < 0) { | |
668 | /* Ret value is a valid lttng error code. */ | |
669 | goto end; | |
670 | } | |
671 | ||
672 | llm = *((typeof(llm) *) reply->buffer.data); | |
673 | ||
674 | /* Check error code if OK */ | |
675 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
676 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
677 | /* Invalid error code received. */ | |
678 | ret = -LTTNG_ERR_UNK; | |
679 | } else { | |
680 | ret = -llm.ret_code; | |
681 | } | |
e368fb43 JG |
682 | goto end; |
683 | } | |
684 | ||
685 | if (llm.cmd_header_size > 0) { | |
686 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
687 | if (ret < 0) { | |
688 | goto end; | |
689 | } | |
690 | } | |
691 | ||
692 | /* Get command header from data transmission */ | |
693 | if (llm.data_size > 0) { | |
694 | ret = recv_payload_sessiond(reply, llm.data_size); | |
695 | if (ret < 0) { | |
696 | goto end; | |
697 | } | |
698 | } | |
699 | ||
700 | if (llm.fd_count > 0) { | |
fe489250 JG |
701 | ret = lttcomm_recv_payload_fds_unix_sock( |
702 | sessiond_socket, llm.fd_count, reply); | |
703 | if (ret < 0) { | |
e368fb43 JG |
704 | goto end; |
705 | } | |
706 | } | |
707 | ||
708 | /* Don't return the llm header to the caller. */ | |
709 | memmove(reply->buffer.data, reply->buffer.data + sizeof(llm), | |
710 | reply->buffer.size - sizeof(llm)); | |
711 | ret = lttng_dynamic_buffer_set_size( | |
712 | &reply->buffer, reply->buffer.size - sizeof(llm)); | |
713 | if (ret) { | |
714 | /* Can't happen as size is reduced. */ | |
715 | abort(); | |
716 | } | |
717 | ||
718 | ret = reply->buffer.size; | |
719 | ||
720 | end: | |
721 | disconnect_sessiond(); | |
722 | return ret; | |
723 | } | |
724 | ||
9f19cc17 | 725 | /* |
cd80958d | 726 | * Create lttng handle and return pointer. |
9ae110e2 | 727 | * |
1c8d13c8 | 728 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 729 | */ |
cd80958d DG |
730 | struct lttng_handle *lttng_create_handle(const char *session_name, |
731 | struct lttng_domain *domain) | |
9f19cc17 | 732 | { |
e1b624d0 | 733 | int ret; |
2f70b271 DG |
734 | struct lttng_handle *handle = NULL; |
735 | ||
3f451dc0 | 736 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 737 | if (handle == NULL) { |
2f70b271 | 738 | PERROR("malloc handle"); |
cd80958d DG |
739 | goto end; |
740 | } | |
741 | ||
742 | /* Copy session name */ | |
e1b624d0 JG |
743 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
744 | sizeof(handle->session_name)); | |
745 | if (ret) { | |
746 | goto error; | |
747 | } | |
cd80958d | 748 | |
95681498 JG |
749 | /* Copy lttng domain or leave initialized to 0. */ |
750 | if (domain) { | |
751 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
752 | } | |
cd80958d DG |
753 | |
754 | end: | |
755 | return handle; | |
e1b624d0 JG |
756 | error: |
757 | free(handle); | |
758 | return NULL; | |
cd80958d DG |
759 | } |
760 | ||
761 | /* | |
762 | * Destroy handle by free(3) the pointer. | |
763 | */ | |
764 | void lttng_destroy_handle(struct lttng_handle *handle) | |
765 | { | |
0e428499 | 766 | free(handle); |
eb354453 DG |
767 | } |
768 | ||
d9800920 DG |
769 | /* |
770 | * Register an outside consumer. | |
9ae110e2 | 771 | * |
1c8d13c8 | 772 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
773 | */ |
774 | int lttng_register_consumer(struct lttng_handle *handle, | |
775 | const char *socket_path) | |
776 | { | |
e1b624d0 | 777 | int ret; |
d9800920 DG |
778 | struct lttcomm_session_msg lsm; |
779 | ||
2f70b271 | 780 | if (handle == NULL || socket_path == NULL) { |
e1b624d0 JG |
781 | ret = -LTTNG_ERR_INVALID; |
782 | goto end; | |
2f70b271 DG |
783 | } |
784 | ||
53efb85a | 785 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 786 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
e1b624d0 | 787 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 788 | sizeof(lsm.session.name)); |
e1b624d0 JG |
789 | if (ret) { |
790 | ret = -LTTNG_ERR_INVALID; | |
791 | goto end; | |
792 | } | |
793 | ||
60160d2a | 794 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 795 | |
e1b624d0 JG |
796 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
797 | sizeof(lsm.u.reg.path)); | |
798 | if (ret) { | |
799 | ret = -LTTNG_ERR_INVALID; | |
800 | goto end; | |
801 | } | |
d9800920 | 802 | |
e1b624d0 JG |
803 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
804 | end: | |
805 | return ret; | |
d9800920 DG |
806 | } |
807 | ||
1df4dedd | 808 | /* |
9ae110e2 JG |
809 | * Start tracing for all traces of the session. |
810 | * | |
811 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 812 | */ |
6a4f824d | 813 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 814 | { |
e1b624d0 | 815 | int ret; |
cd80958d DG |
816 | struct lttcomm_session_msg lsm; |
817 | ||
6a4f824d | 818 | if (session_name == NULL) { |
e1b624d0 JG |
819 | ret = -LTTNG_ERR_INVALID; |
820 | goto end; | |
cd80958d DG |
821 | } |
822 | ||
53efb85a | 823 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 824 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 825 | |
e1b624d0 JG |
826 | ret = lttng_strncpy(lsm.session.name, session_name, |
827 | sizeof(lsm.session.name)); | |
828 | if (ret) { | |
829 | ret = -LTTNG_ERR_INVALID; | |
830 | goto end; | |
831 | } | |
cd80958d | 832 | |
e1b624d0 JG |
833 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
834 | end: | |
835 | return ret; | |
f3ed775e | 836 | } |
1df4dedd DG |
837 | |
838 | /* | |
38ee087f | 839 | * Stop tracing for all traces of the session. |
f3ed775e | 840 | */ |
38ee087f | 841 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 842 | { |
38ee087f | 843 | int ret, data_ret; |
cd80958d DG |
844 | struct lttcomm_session_msg lsm; |
845 | ||
6a4f824d | 846 | if (session_name == NULL) { |
e1b624d0 JG |
847 | ret = -LTTNG_ERR_INVALID; |
848 | goto error; | |
6a4f824d DG |
849 | } |
850 | ||
53efb85a | 851 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 852 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 853 | |
e1b624d0 JG |
854 | ret = lttng_strncpy(lsm.session.name, session_name, |
855 | sizeof(lsm.session.name)); | |
856 | if (ret) { | |
857 | ret = -LTTNG_ERR_INVALID; | |
858 | goto error; | |
859 | } | |
cd80958d | 860 | |
cac3069d | 861 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
862 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
863 | goto error; | |
864 | } | |
865 | ||
866 | if (!wait) { | |
867 | goto end; | |
868 | } | |
869 | ||
38ee087f DG |
870 | /* Check for data availability */ |
871 | do { | |
6d805429 | 872 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
873 | if (data_ret < 0) { |
874 | /* Return the data available call error. */ | |
875 | ret = data_ret; | |
876 | goto error; | |
877 | } | |
878 | ||
879 | /* | |
9ae110e2 JG |
880 | * Data sleep time before retrying (in usec). Don't sleep if the |
881 | * call returned value indicates availability. | |
38ee087f | 882 | */ |
6d805429 | 883 | if (data_ret) { |
c8f61fd4 | 884 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 885 | } |
6d805429 | 886 | } while (data_ret != 0); |
38ee087f | 887 | |
38ee087f DG |
888 | end: |
889 | error: | |
890 | return ret; | |
891 | } | |
892 | ||
893 | /* | |
894 | * Stop tracing and wait for data availability. | |
895 | */ | |
896 | int lttng_stop_tracing(const char *session_name) | |
897 | { | |
898 | return _lttng_stop_tracing(session_name, 1); | |
899 | } | |
900 | ||
901 | /* | |
902 | * Stop tracing but _don't_ wait for data availability. | |
903 | */ | |
904 | int lttng_stop_tracing_no_wait(const char *session_name) | |
905 | { | |
906 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
907 | } |
908 | ||
909 | /* | |
601d5acf DG |
910 | * Add context to a channel. |
911 | * | |
912 | * If the given channel is NULL, add the contexts to all channels. | |
913 | * The event_name param is ignored. | |
af87c45a DG |
914 | * |
915 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 916 | */ |
cd80958d | 917 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
918 | struct lttng_event_context *ctx, const char *event_name, |
919 | const char *channel_name) | |
d65106b1 | 920 | { |
2001793c | 921 | int ret; |
a4a3d6bd JR |
922 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_ADD_CONTEXT }; |
923 | struct lttng_payload payload; | |
924 | ||
925 | lttng_payload_init(&payload); | |
cd80958d | 926 | |
9ae110e2 | 927 | /* Safety check. Both are mandatory. */ |
9d697d3d | 928 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
929 | ret = -LTTNG_ERR_INVALID; |
930 | goto end; | |
cd80958d DG |
931 | } |
932 | ||
a4a3d6bd JR |
933 | ret = lttng_dynamic_buffer_set_size(&payload.buffer, sizeof(lsm)); |
934 | if (ret) { | |
935 | ret = -LTTNG_ERR_NOMEM; | |
936 | goto end; | |
937 | } | |
cd80958d | 938 | |
85076754 | 939 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
940 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
941 | sizeof(lsm.u.context.channel_name)); | |
942 | if (ret) { | |
943 | ret = -LTTNG_ERR_INVALID; | |
944 | goto end; | |
85076754 | 945 | } |
cd80958d | 946 | |
60160d2a | 947 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
e1b624d0 | 948 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 949 | sizeof(lsm.session.name)); |
e1b624d0 JG |
950 | if (ret) { |
951 | ret = -LTTNG_ERR_INVALID; | |
952 | goto end; | |
953 | } | |
cd80958d | 954 | |
a4a3d6bd JR |
955 | ret = lttng_event_context_serialize(ctx, &payload); |
956 | if (ret) { | |
957 | ret = -LTTNG_ERR_INVALID; | |
958 | goto end; | |
959 | } | |
2001793c | 960 | |
a4a3d6bd | 961 | lsm.u.context.length = payload.buffer.size - sizeof(lsm); |
2001793c | 962 | |
a4a3d6bd JR |
963 | /* Update message header. */ |
964 | memcpy(payload.buffer.data, &lsm, sizeof(lsm)); | |
2001793c | 965 | |
a4a3d6bd JR |
966 | { |
967 | struct lttng_payload reply; | |
968 | struct lttng_payload_view payload_view = | |
969 | lttng_payload_view_from_payload(&payload, 0, | |
970 | -1); | |
2001793c | 971 | |
a4a3d6bd JR |
972 | lttng_payload_init(&reply); |
973 | ret = lttng_ctl_ask_sessiond_payload(&payload_view, &reply); | |
974 | lttng_payload_reset(&reply); | |
975 | if (ret) { | |
2001793c JG |
976 | goto end; |
977 | } | |
2001793c | 978 | } |
46f44e2a | 979 | |
2001793c | 980 | end: |
a4a3d6bd | 981 | lttng_payload_reset(&payload); |
2001793c | 982 | return ret; |
d65106b1 DG |
983 | } |
984 | ||
f3ed775e | 985 | /* |
9ae110e2 JG |
986 | * Enable event(s) for a channel. |
987 | * | |
988 | * If no event name is specified, all events are enabled. | |
989 | * If no channel name is specified, the default 'channel0' is used. | |
990 | * | |
991 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 992 | */ |
cd80958d | 993 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 994 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 995 | { |
f8a96544 JI |
996 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
997 | NULL, 0, NULL); | |
1df4dedd DG |
998 | } |
999 | ||
53a80697 | 1000 | /* |
025faf73 | 1001 | * Create or enable an event with a filter expression. |
178191b3 | 1002 | * |
53a80697 MD |
1003 | * Return negative error value on error. |
1004 | * Return size of returned session payload data if OK. | |
1005 | */ | |
025faf73 | 1006 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 1007 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
1008 | const char *filter_expression) |
1009 | { | |
f8a96544 JI |
1010 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
1011 | filter_expression, 0, NULL); | |
53a80697 MD |
1012 | } |
1013 | ||
347c5ab5 | 1014 | /* |
0e115563 | 1015 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1016 | * NULL if not applicable. |
1017 | * | |
1018 | * An event with NO loglevel and the name is * will return NULL. | |
1019 | */ | |
0e115563 | 1020 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1021 | { |
1022 | int err; | |
0e115563 | 1023 | char *agent_filter = NULL; |
347c5ab5 DG |
1024 | |
1025 | assert(ev); | |
1026 | ||
1027 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1028 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1029 | if (filter) { |
0e115563 | 1030 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
1031 | ev->name); |
1032 | } else { | |
0e115563 | 1033 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1034 | } |
1035 | if (err < 0) { | |
1036 | PERROR("asprintf"); | |
6a556f7b | 1037 | goto error; |
347c5ab5 DG |
1038 | } |
1039 | } | |
1040 | ||
1041 | /* Add loglevel filtering if any for the JUL domain. */ | |
1042 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1043 | const char *op; |
347c5ab5 DG |
1044 | |
1045 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1046 | op = ">="; | |
1047 | } else { | |
1048 | op = "=="; | |
1049 | } | |
1050 | ||
0e115563 | 1051 | if (filter || agent_filter) { |
6a556f7b JG |
1052 | char *new_filter; |
1053 | ||
fb0edb23 | 1054 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 1055 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 1056 | ev->loglevel); |
0e115563 DG |
1057 | if (agent_filter) { |
1058 | free(agent_filter); | |
6a556f7b | 1059 | } |
0e115563 | 1060 | agent_filter = new_filter; |
347c5ab5 | 1061 | } else { |
0e115563 | 1062 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
1063 | ev->loglevel); |
1064 | } | |
1065 | if (err < 0) { | |
1066 | PERROR("asprintf"); | |
6a556f7b | 1067 | goto error; |
347c5ab5 DG |
1068 | } |
1069 | } | |
1070 | ||
0e115563 | 1071 | return agent_filter; |
6a556f7b | 1072 | error: |
0e115563 | 1073 | free(agent_filter); |
6a556f7b | 1074 | return NULL; |
347c5ab5 DG |
1075 | } |
1076 | ||
93deb080 JI |
1077 | /* |
1078 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1079 | * If no event name is specified, all events are enabled. | |
1080 | * If no channel name is specified, the default name is used. | |
1081 | * If filter expression is not NULL, the filter is set for the event. | |
1082 | * If exclusion count is not zero, the exclusions are set for the event. | |
1083 | * Returns size of returned session payload data or a negative error code. | |
1084 | */ | |
1085 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1086 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1087 | const char *original_filter_expression, |
93deb080 JI |
1088 | int exclusion_count, char **exclusion_list) |
1089 | { | |
fe5e9e65 | 1090 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_ENABLE_EVENT }; |
e368fb43 | 1091 | struct lttng_payload payload; |
fe5e9e65 | 1092 | int ret = 0; |
137b9942 | 1093 | unsigned int free_filter_expression = 0; |
93deb080 | 1094 | struct filter_parser_ctx *ctx = NULL; |
fe5e9e65 | 1095 | size_t bytecode_len = 0; |
ec005ec6 | 1096 | |
6a0838b7 YL |
1097 | /* |
1098 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1099 | * a variable-length payload from where to send the data. |
6a0838b7 | 1100 | */ |
e368fb43 | 1101 | lttng_payload_init(&payload); |
ec005ec6 | 1102 | |
e9efbcd3 JG |
1103 | /* |
1104 | * Cast as non-const since we may replace the filter expression | |
1105 | * by a dynamically allocated string. Otherwise, the original | |
1106 | * string is not modified. | |
1107 | */ | |
1108 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1109 | |
1110 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1111 | ret = -LTTNG_ERR_INVALID; |
1112 | goto error; | |
93deb080 JI |
1113 | } |
1114 | ||
9ae110e2 JG |
1115 | /* |
1116 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1117 | * anyway, so treat this corner-case early to eliminate |
1118 | * lttng_fmemopen error for 0-byte allocation. | |
1119 | */ | |
1120 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1121 | ret = -LTTNG_ERR_INVALID; |
1122 | goto error; | |
93deb080 JI |
1123 | } |
1124 | ||
18a720cd | 1125 | if (ev->name[0] == '\0') { |
e1b624d0 JG |
1126 | /* Enable all events. */ |
1127 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
1128 | assert(ret == 0); | |
6565421f | 1129 | } |
93deb080 | 1130 | |
9ae110e2 | 1131 | /* Parse filter expression. */ |
5cdb6027 | 1132 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1133 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1134 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1135 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1136 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1137 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1138 | char *agent_filter; | |
64226865 | 1139 | |
fe5e9e65 | 1140 | /* Setup agent filter if needed. */ |
0e115563 DG |
1141 | agent_filter = set_agent_filter(filter_expression, ev); |
1142 | if (!agent_filter) { | |
137b9942 | 1143 | if (!filter_expression) { |
9ae110e2 JG |
1144 | /* |
1145 | * No JUL and no filter, just skip | |
1146 | * everything below. | |
1147 | */ | |
fe5e9e65 | 1148 | goto serialize; |
137b9942 | 1149 | } |
64226865 DG |
1150 | } else { |
1151 | /* | |
9ae110e2 JG |
1152 | * With an agent filter, the original filter has |
1153 | * been added to it thus replace the filter | |
1154 | * expression. | |
64226865 | 1155 | */ |
0e115563 | 1156 | filter_expression = agent_filter; |
e9efbcd3 | 1157 | free_filter_expression = 1; |
9b21e6d5 | 1158 | } |
9b21e6d5 | 1159 | } |
93deb080 | 1160 | |
fe5e9e65 JR |
1161 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == |
1162 | LTTNG_FILTER_MAX_LEN) { | |
1163 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1164 | goto error; | |
1165 | } | |
1166 | ||
e4d2f27a | 1167 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1168 | if (ret) { |
fe5e9e65 | 1169 | goto error; |
93deb080 | 1170 | } |
e4d2f27a | 1171 | |
fe5e9e65 JR |
1172 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + |
1173 | sizeof(ctx->bytecode->b); | |
1174 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
1175 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1176 | goto error; | |
1177 | } | |
6b453b5e JG |
1178 | } |
1179 | ||
fe5e9e65 JR |
1180 | serialize: |
1181 | ret = lttng_event_serialize(ev, exclusion_count, exclusion_list, | |
1182 | filter_expression, bytecode_len, | |
1183 | (ctx && bytecode_len) ? &ctx->bytecode->b : NULL, | |
1184 | &payload); | |
15e37663 | 1185 | if (ret) { |
fe5e9e65 JR |
1186 | ret = -LTTNG_ERR_INVALID; |
1187 | goto error; | |
6b453b5e | 1188 | } |
137b9942 | 1189 | |
fe5e9e65 JR |
1190 | /* If no channel name, send empty string. */ |
1191 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", | |
1192 | sizeof(lsm.u.enable.channel_name)); | |
1193 | if (ret) { | |
1194 | ret = -LTTNG_ERR_INVALID; | |
1195 | goto error; | |
6b453b5e | 1196 | } |
15e37663 | 1197 | |
fe5e9e65 JR |
1198 | /* Domain */ |
1199 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
15e37663 | 1200 | |
fe5e9e65 JR |
1201 | /* Session name */ |
1202 | ret = lttng_strncpy(lsm.session.name, handle->session_name, | |
1203 | sizeof(lsm.session.name)); | |
1204 | if (ret) { | |
1205 | ret = -LTTNG_ERR_INVALID; | |
1206 | goto error; | |
93deb080 JI |
1207 | } |
1208 | ||
fe5e9e65 JR |
1209 | /* Length of the serialized event. */ |
1210 | lsm.u.enable.length = (uint32_t) payload.buffer.size; | |
1211 | ||
e368fb43 JG |
1212 | { |
1213 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1214 | &payload, 0, -1); | |
fe489250 | 1215 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1216 | int fd_to_send; |
1217 | ||
1218 | if (fd_count < 0) { | |
fe5e9e65 | 1219 | goto error; |
e368fb43 JG |
1220 | } |
1221 | ||
1222 | assert(fd_count == 0 || fd_count == 1); | |
1223 | if (fd_count == 1) { | |
e2fc8e9d | 1224 | struct fd_handle *h = |
fe489250 JG |
1225 | lttng_payload_view_pop_fd_handle(&view); |
1226 | ||
e2fc8e9d | 1227 | if (!h) { |
fe5e9e65 | 1228 | goto error; |
e368fb43 JG |
1229 | } |
1230 | ||
e2fc8e9d SM |
1231 | fd_to_send = fd_handle_get_fd(h); |
1232 | fd_handle_put(h); | |
e368fb43 JG |
1233 | } |
1234 | ||
fe5e9e65 JR |
1235 | lsm.fd_count = fd_count; |
1236 | ||
e368fb43 JG |
1237 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1238 | fd_count ? &fd_to_send : NULL, fd_count, | |
1239 | view.buffer.size ? view.buffer.data : NULL, | |
1240 | view.buffer.size, NULL, NULL, 0); | |
1241 | } | |
93deb080 | 1242 | |
fe5e9e65 | 1243 | error: |
7ca1dc6f | 1244 | if (filter_expression && ctx) { |
93deb080 JI |
1245 | filter_bytecode_free(ctx); |
1246 | filter_ir_free(ctx); | |
1247 | filter_parser_ctx_free(ctx); | |
7ca1dc6f | 1248 | } |
7ca1dc6f DG |
1249 | if (free_filter_expression) { |
1250 | /* | |
9ae110e2 JG |
1251 | * The filter expression has been replaced and must be freed as |
1252 | * it is not the original filter expression received as a | |
1253 | * parameter. | |
7ca1dc6f DG |
1254 | */ |
1255 | free(filter_expression); | |
93deb080 | 1256 | } |
137b9942 | 1257 | /* |
9ae110e2 JG |
1258 | * Return directly to the caller and don't ask the sessiond since |
1259 | * something went wrong in the parsing of data above. | |
137b9942 | 1260 | */ |
e368fb43 | 1261 | lttng_payload_reset(&payload); |
93deb080 JI |
1262 | return ret; |
1263 | } | |
1264 | ||
6e911cad MD |
1265 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1266 | struct lttng_event *ev, const char *channel_name, | |
1267 | const char *original_filter_expression) | |
1df4dedd | 1268 | { |
fe5e9e65 JR |
1269 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_DISABLE_EVENT }; |
1270 | struct lttng_payload payload; | |
6e911cad MD |
1271 | int ret = 0; |
1272 | unsigned int free_filter_expression = 0; | |
1273 | struct filter_parser_ctx *ctx = NULL; | |
fe5e9e65 JR |
1274 | size_t bytecode_len = 0; |
1275 | ||
1276 | /* | |
1277 | * We have either a filter or some exclusions, so we need to set up | |
1278 | * a variable-length payload from where to send the data. | |
1279 | */ | |
1280 | lttng_payload_init(&payload); | |
1281 | ||
6e911cad MD |
1282 | /* |
1283 | * Cast as non-const since we may replace the filter expression | |
1284 | * by a dynamically allocated string. Otherwise, the original | |
1285 | * string is not modified. | |
1286 | */ | |
1287 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1288 | |
6e911cad MD |
1289 | if (handle == NULL || ev == NULL) { |
1290 | ret = -LTTNG_ERR_INVALID; | |
1291 | goto error; | |
1292 | } | |
1293 | ||
9ae110e2 JG |
1294 | /* |
1295 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1296 | * anyway, so treat this corner-case early to eliminate |
1297 | * lttng_fmemopen error for 0-byte allocation. | |
1298 | */ | |
1299 | if (filter_expression && filter_expression[0] == '\0') { | |
1300 | ret = -LTTNG_ERR_INVALID; | |
1301 | goto error; | |
cd80958d DG |
1302 | } |
1303 | ||
fe5e9e65 | 1304 | /* Parse filter expression. */ |
6e911cad | 1305 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1306 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1307 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1308 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1309 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1310 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1311 | char *agent_filter; | |
6e911cad | 1312 | |
fe5e9e65 | 1313 | /* Setup agent filter if needed. */ |
0e115563 DG |
1314 | agent_filter = set_agent_filter(filter_expression, ev); |
1315 | if (!agent_filter) { | |
6e911cad | 1316 | if (!filter_expression) { |
9ae110e2 JG |
1317 | /* |
1318 | * No JUL and no filter, just skip | |
1319 | * everything below. | |
1320 | */ | |
fe5e9e65 | 1321 | goto serialize; |
6e911cad MD |
1322 | } |
1323 | } else { | |
1324 | /* | |
fe5e9e65 | 1325 | * With an agent filter, the original filter has |
9ae110e2 JG |
1326 | * been added to it thus replace the filter |
1327 | * expression. | |
6e911cad | 1328 | */ |
0e115563 | 1329 | filter_expression = agent_filter; |
6e911cad MD |
1330 | free_filter_expression = 1; |
1331 | } | |
1332 | } | |
1333 | ||
fe5e9e65 JR |
1334 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == |
1335 | LTTNG_FILTER_MAX_LEN) { | |
1336 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1337 | goto error; | |
1338 | } | |
1339 | ||
e4d2f27a | 1340 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad | 1341 | if (ret) { |
fe5e9e65 | 1342 | goto error; |
6e911cad | 1343 | } |
e4d2f27a | 1344 | |
fe5e9e65 JR |
1345 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + |
1346 | sizeof(ctx->bytecode->b); | |
1347 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
1348 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1349 | goto error; | |
1350 | } | |
6e911cad MD |
1351 | } |
1352 | ||
fe5e9e65 JR |
1353 | serialize: |
1354 | ret = lttng_event_serialize(ev, 0, NULL, | |
1355 | filter_expression, bytecode_len, | |
1356 | (ctx && bytecode_len) ? &ctx->bytecode->b : NULL, | |
1357 | &payload); | |
1358 | if (ret) { | |
1359 | ret = -LTTNG_ERR_INVALID; | |
1360 | goto error; | |
6e911cad MD |
1361 | } |
1362 | ||
fe5e9e65 JR |
1363 | /* If no channel name, send empty string. */ |
1364 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", | |
1365 | sizeof(lsm.u.disable.channel_name)); | |
1366 | if (ret) { | |
1367 | ret = -LTTNG_ERR_INVALID; | |
1368 | goto error; | |
6e911cad | 1369 | } |
fe5e9e65 JR |
1370 | |
1371 | /* Domain */ | |
1372 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1373 | ||
1374 | /* Session name */ | |
1375 | ret = lttng_strncpy(lsm.session.name, handle->session_name, | |
1376 | sizeof(lsm.session.name)); | |
1377 | if (ret) { | |
1378 | ret = -LTTNG_ERR_INVALID; | |
1379 | goto error; | |
6e911cad MD |
1380 | } |
1381 | ||
fe5e9e65 JR |
1382 | /* Length of the serialized event. */ |
1383 | lsm.u.disable.length = (uint32_t) payload.buffer.size; | |
1384 | ||
1385 | { | |
1386 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1387 | &payload, 0, -1); | |
1388 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); | |
1389 | int fd_to_send; | |
1390 | ||
1391 | if (fd_count < 0) { | |
1392 | goto error; | |
1393 | } | |
1394 | ||
1395 | assert(fd_count == 0 || fd_count == 1); | |
1396 | if (fd_count == 1) { | |
1397 | struct fd_handle *h = | |
1398 | lttng_payload_view_pop_fd_handle(&view); | |
6e911cad | 1399 | |
fe5e9e65 JR |
1400 | if (!h) { |
1401 | goto error; | |
1402 | } | |
1403 | ||
1404 | fd_to_send = fd_handle_get_fd(h); | |
1405 | fd_handle_put(h); | |
1406 | } | |
1407 | ||
1408 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1409 | fd_count ? &fd_to_send : NULL, fd_count, | |
1410 | view.buffer.size ? view.buffer.data : NULL, | |
1411 | view.buffer.size, NULL, NULL, 0); | |
1412 | } | |
1413 | ||
1414 | error: | |
6e911cad MD |
1415 | if (filter_expression && ctx) { |
1416 | filter_bytecode_free(ctx); | |
1417 | filter_ir_free(ctx); | |
1418 | filter_parser_ctx_free(ctx); | |
1419 | } | |
6e911cad MD |
1420 | if (free_filter_expression) { |
1421 | /* | |
9ae110e2 JG |
1422 | * The filter expression has been replaced and must be freed as |
1423 | * it is not the original filter expression received as a | |
1424 | * parameter. | |
6e911cad MD |
1425 | */ |
1426 | free(filter_expression); | |
1427 | } | |
6e911cad | 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 | 1431 | */ |
fe5e9e65 | 1432 | lttng_payload_reset(&payload); |
6e911cad MD |
1433 | return ret; |
1434 | } | |
1435 | ||
1436 | /* | |
9ae110e2 JG |
1437 | * Disable event(s) of a channel and domain. |
1438 | * If no event name is specified, all events are disabled. | |
1439 | * If no channel name is specified, the default 'channel0' is used. | |
1440 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1441 | */ |
1442 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1443 | const char *channel_name) | |
1444 | { | |
e1b624d0 | 1445 | int ret; |
6e911cad MD |
1446 | struct lttng_event ev; |
1447 | ||
1448 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1449 | ev.loglevel = -1; |
6e911cad | 1450 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1451 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1452 | if (ret) { | |
1453 | ret = -LTTNG_ERR_INVALID; | |
1454 | goto end; | |
1455 | } | |
1456 | ||
1457 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1458 | end: | |
1459 | return ret; | |
1df4dedd DG |
1460 | } |
1461 | ||
cf0bcb51 JG |
1462 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1463 | { | |
1464 | struct lttng_channel *channel = NULL; | |
cf0bcb51 JG |
1465 | |
1466 | if (!domain) { | |
714363d3 | 1467 | goto end; |
cf0bcb51 JG |
1468 | } |
1469 | ||
1470 | /* Validate domain. */ | |
1471 | switch (domain->type) { | |
1472 | case LTTNG_DOMAIN_UST: | |
1473 | switch (domain->buf_type) { | |
1474 | case LTTNG_BUFFER_PER_UID: | |
1475 | case LTTNG_BUFFER_PER_PID: | |
1476 | break; | |
1477 | default: | |
714363d3 | 1478 | goto end; |
cf0bcb51 JG |
1479 | } |
1480 | break; | |
1481 | case LTTNG_DOMAIN_KERNEL: | |
1482 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
714363d3 | 1483 | goto end; |
cf0bcb51 JG |
1484 | } |
1485 | break; | |
1486 | default: | |
714363d3 | 1487 | goto end; |
cf0bcb51 JG |
1488 | } |
1489 | ||
714363d3 | 1490 | channel = lttng_channel_create_internal(); |
cf0bcb51 | 1491 | if (!channel) { |
714363d3 | 1492 | goto end; |
cf0bcb51 JG |
1493 | } |
1494 | ||
cf0bcb51 | 1495 | lttng_channel_set_default_attr(domain, &channel->attr); |
714363d3 | 1496 | end: |
cf0bcb51 | 1497 | return channel; |
cf0bcb51 JG |
1498 | } |
1499 | ||
1500 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1501 | { | |
1502 | if (!channel) { | |
1503 | return; | |
1504 | } | |
1505 | ||
1506 | if (channel->attr.extended.ptr) { | |
1507 | free(channel->attr.extended.ptr); | |
1508 | } | |
1509 | free(channel); | |
1510 | } | |
1511 | ||
1df4dedd | 1512 | /* |
9ae110e2 JG |
1513 | * Enable channel per domain |
1514 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1515 | */ |
cd80958d | 1516 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1517 | struct lttng_channel *in_chan) |
a5c5a2bd | 1518 | { |
d72eb77f | 1519 | enum lttng_error_code ret_code; |
e1b624d0 | 1520 | int ret; |
714363d3 | 1521 | struct lttng_dynamic_buffer buffer; |
cd80958d | 1522 | struct lttcomm_session_msg lsm; |
d72eb77f | 1523 | uint64_t total_buffer_size_needed_per_cpu = 0; |
714363d3 JR |
1524 | struct lttng_channel *channel = NULL; |
1525 | ||
1526 | lttng_dynamic_buffer_init(&buffer); | |
cd80958d | 1527 | |
9ae110e2 | 1528 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1529 | if (handle == NULL || in_chan == NULL) { |
714363d3 JR |
1530 | ret = -LTTNG_ERR_INVALID; |
1531 | goto end; | |
cf0bcb51 | 1532 | } |
cd80958d | 1533 | |
09b72f7a FD |
1534 | /* |
1535 | * Verify that the amount of memory required to create the requested | |
1536 | * buffer is available on the system at the moment. | |
1537 | */ | |
714363d3 JR |
1538 | if (in_chan->attr.num_subbuf > |
1539 | UINT64_MAX / in_chan->attr.subbuf_size) { | |
d72eb77f JR |
1540 | /* Overflow */ |
1541 | ret = -LTTNG_ERR_OVERFLOW; | |
1542 | goto end; | |
1543 | } | |
1544 | ||
714363d3 JR |
1545 | total_buffer_size_needed_per_cpu = |
1546 | in_chan->attr.num_subbuf * in_chan->attr.subbuf_size; | |
d72eb77f JR |
1547 | ret_code = check_enough_available_memory( |
1548 | total_buffer_size_needed_per_cpu); | |
1549 | if (ret_code != LTTNG_OK) { | |
1550 | ret = -ret_code; | |
1551 | goto end; | |
09b72f7a FD |
1552 | } |
1553 | ||
714363d3 JR |
1554 | /* Copy the channel for easier manipulation. */ |
1555 | channel = lttng_channel_copy(in_chan); | |
1556 | if (!channel) { | |
1557 | ret = -LTTNG_ERR_NOMEM; | |
1558 | goto end; | |
1559 | } | |
1560 | ||
1561 | /* Populate the channel extended attribute if necessary. */ | |
1562 | if (!channel->attr.extended.ptr) { | |
1563 | struct lttng_channel_extended *extended = | |
1564 | (struct lttng_channel_extended *) zmalloc( | |
1565 | sizeof(*extended)); | |
1566 | ||
1567 | if (!extended) { | |
1568 | ret = -LTTNG_ERR_NOMEM; | |
1569 | goto end; | |
1570 | } | |
1571 | lttng_channel_set_default_extended_attr( | |
1572 | &handle->domain, extended); | |
1573 | channel->attr.extended.ptr = extended; | |
1574 | } | |
1575 | ||
1576 | /* Prepare the payload */ | |
1577 | memset(&lsm, 0, sizeof(lsm)); | |
1578 | ||
cf0bcb51 | 1579 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1580 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1581 | |
e1b624d0 JG |
1582 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1583 | sizeof(lsm.session.name)); | |
1584 | if (ret) { | |
1585 | ret = -LTTNG_ERR_INVALID; | |
1586 | goto end; | |
1587 | } | |
cd80958d | 1588 | |
714363d3 JR |
1589 | ret = lttng_channel_serialize(channel, &buffer); |
1590 | if (ret) { | |
1591 | ret = -LTTNG_ERR_FATAL; | |
1592 | goto end; | |
1593 | } | |
1594 | ||
1595 | lsm.u.channel.length = buffer.size; | |
1596 | ||
1597 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( | |
1598 | &lsm, buffer.data, buffer.size, NULL); | |
e1b624d0 | 1599 | end: |
714363d3 JR |
1600 | lttng_channel_destroy(channel); |
1601 | lttng_dynamic_buffer_reset(&buffer); | |
e1b624d0 | 1602 | return ret; |
8c0faa1d | 1603 | } |
1df4dedd | 1604 | |
2ef84c95 | 1605 | /* |
9ae110e2 JG |
1606 | * All tracing will be stopped for registered events of the channel. |
1607 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1608 | */ |
cd80958d | 1609 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1610 | { |
e1b624d0 | 1611 | int ret; |
cd80958d DG |
1612 | struct lttcomm_session_msg lsm; |
1613 | ||
9ae110e2 | 1614 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1615 | if (handle == NULL || name == NULL) { |
2f70b271 | 1616 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1617 | } |
1618 | ||
441c16a7 MD |
1619 | memset(&lsm, 0, sizeof(lsm)); |
1620 | ||
cd80958d | 1621 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1622 | |
e1b624d0 | 1623 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1624 | sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1625 | if (ret) { |
1626 | ret = -LTTNG_ERR_INVALID; | |
1627 | goto end; | |
1628 | } | |
9d697d3d | 1629 | |
60160d2a | 1630 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1631 | |
e1b624d0 JG |
1632 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1633 | sizeof(lsm.session.name)); | |
1634 | if (ret) { | |
1635 | ret = -LTTNG_ERR_INVALID; | |
1636 | goto end; | |
1637 | } | |
cd80958d | 1638 | |
e1b624d0 JG |
1639 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1640 | end: | |
1641 | return ret; | |
ca95a216 DG |
1642 | } |
1643 | ||
fac6795d | 1644 | /* |
9ae110e2 JG |
1645 | * Lists all available tracepoints of domain. |
1646 | * Sets the contents of the events array. | |
1647 | * Returns the number of lttng_event entries in events; | |
1648 | * on error, returns a negative value. | |
fac6795d | 1649 | */ |
cd80958d | 1650 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1651 | struct lttng_event **events) |
fac6795d | 1652 | { |
fe5e9e65 JR |
1653 | enum lttng_error_code ret_code; |
1654 | int ret, total_payload_received; | |
1655 | char *reception_buffer = NULL; | |
1656 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRACEPOINTS }; | |
1657 | struct lttcomm_list_command_header *cmd_header = NULL; | |
1658 | size_t cmd_header_len; | |
1659 | unsigned int nb_events = 0; | |
1660 | ||
1661 | if (handle == NULL) { | |
1662 | ret = -LTTNG_ERR_INVALID; | |
1663 | goto end; | |
1664 | } | |
1665 | ||
1666 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1667 | ||
1668 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, | |
1669 | (void **) &reception_buffer, (void **) &cmd_header, | |
1670 | &cmd_header_len); | |
1671 | if (ret < 0) { | |
1672 | goto end; | |
1673 | } | |
1674 | ||
1675 | total_payload_received = ret; | |
1676 | ||
1677 | if (!cmd_header) { | |
1678 | ret = -LTTNG_ERR_UNK; | |
1679 | goto end; | |
1680 | } | |
1681 | ||
1682 | if (cmd_header->count > INT_MAX) { | |
1683 | ret = -LTTNG_ERR_OVERFLOW; | |
1684 | goto end; | |
1685 | } | |
1686 | ||
1687 | nb_events = (unsigned int) cmd_header->count; | |
fac6795d | 1688 | |
fe5e9e65 JR |
1689 | { |
1690 | struct lttng_buffer_view events_view = | |
1691 | lttng_buffer_view_init(reception_buffer, 0, | |
1692 | total_payload_received); | |
1693 | struct lttng_payload_view events_payload_view = | |
1694 | lttng_payload_view_from_buffer_view( | |
1695 | &events_view, 0, -1); | |
2a71efd5 | 1696 | |
fe5e9e65 JR |
1697 | ret_code = lttng_events_create_and_flatten_from_payload( |
1698 | &events_payload_view, nb_events, events); | |
1699 | if (ret_code != LTTNG_OK) { | |
1700 | ret = -ret_code; | |
1701 | goto end; | |
1702 | } | |
eb354453 | 1703 | } |
fac6795d | 1704 | |
fe5e9e65 JR |
1705 | ret = (int) nb_events; |
1706 | ||
1707 | end: | |
1708 | free(cmd_header); | |
1709 | free(reception_buffer); | |
1710 | return ret; | |
fac6795d DG |
1711 | } |
1712 | ||
f37d259d | 1713 | /* |
9ae110e2 JG |
1714 | * Lists all available tracepoint fields of domain. |
1715 | * Sets the contents of the event field array. | |
1716 | * Returns the number of lttng_event_field entries in events; | |
1717 | * on error, returns a negative value. | |
f37d259d MD |
1718 | */ |
1719 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1720 | struct lttng_event_field **fields) | |
1721 | { | |
1722 | int ret; | |
1723 | struct lttcomm_session_msg lsm; | |
1724 | ||
1725 | if (handle == NULL) { | |
2f70b271 | 1726 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1727 | } |
1728 | ||
53efb85a | 1729 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1730 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1731 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1732 | |
cac3069d | 1733 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1734 | if (ret < 0) { |
1735 | return ret; | |
1736 | } | |
1737 | ||
1738 | return ret / sizeof(struct lttng_event_field); | |
1739 | } | |
1740 | ||
834978fd | 1741 | /* |
9ae110e2 JG |
1742 | * Lists all available kernel system calls. Allocates and sets the contents of |
1743 | * the events array. | |
834978fd | 1744 | * |
9ae110e2 JG |
1745 | * Returns the number of lttng_event entries in events; on error, returns a |
1746 | * negative value. | |
834978fd DG |
1747 | */ |
1748 | int lttng_list_syscalls(struct lttng_event **events) | |
1749 | { | |
fe5e9e65 JR |
1750 | enum lttng_error_code ret_code; |
1751 | int ret, total_payload_received; | |
1752 | char *reception_buffer = NULL; | |
1753 | struct lttcomm_session_msg lsm = {}; | |
1754 | struct lttcomm_list_command_header *cmd_header = NULL; | |
1755 | size_t cmd_header_len; | |
1756 | uint32_t nb_events = 0; | |
1757 | ||
1758 | if (!events) { | |
1759 | ret = -LTTNG_ERR_INVALID; | |
1760 | goto end; | |
1761 | } | |
1762 | ||
1763 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1764 | /* Force kernel domain for system calls. */ | |
1765 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1766 | ||
1767 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, | |
1768 | (void **) &reception_buffer, (void **) &cmd_header, | |
1769 | &cmd_header_len); | |
1770 | if (ret < 0) { | |
1771 | goto end; | |
1772 | } | |
1773 | total_payload_received = ret; | |
1774 | ||
1775 | if (!cmd_header) { | |
1776 | ret = -LTTNG_ERR_UNK; | |
1777 | goto end; | |
1778 | } | |
1779 | ||
1780 | if (cmd_header->count > INT_MAX) { | |
1781 | ret = -LTTNG_ERR_OVERFLOW; | |
1782 | goto end; | |
1783 | } | |
1784 | ||
1785 | nb_events = (unsigned int) cmd_header->count; | |
1786 | ||
1787 | { | |
1788 | const struct lttng_buffer_view events_view = | |
1789 | lttng_buffer_view_init(reception_buffer, 0, | |
1790 | total_payload_received); | |
1791 | struct lttng_payload_view events_payload_view = | |
1792 | lttng_payload_view_from_buffer_view( | |
1793 | &events_view, 0, -1); | |
1794 | ||
1795 | ret_code = lttng_events_create_and_flatten_from_payload( | |
1796 | &events_payload_view, nb_events, events); | |
1797 | if (ret_code != LTTNG_OK) { | |
1798 | ret = -ret_code; | |
1799 | goto end; | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | ret = (int) nb_events; | |
834978fd | 1804 | |
fe5e9e65 JR |
1805 | end: |
1806 | free(reception_buffer); | |
1807 | free(cmd_header); | |
1808 | return ret; | |
834978fd DG |
1809 | } |
1810 | ||
1657e9bb | 1811 | /* |
9ae110e2 JG |
1812 | * Returns a human readable string describing |
1813 | * the error code (a negative value). | |
1657e9bb | 1814 | */ |
9a745bc7 | 1815 | const char *lttng_strerror(int code) |
1657e9bb | 1816 | { |
f73fabfd | 1817 | return error_get_str(code); |
1657e9bb DG |
1818 | } |
1819 | ||
b178f53e JG |
1820 | enum lttng_error_code lttng_create_session_ext( |
1821 | struct lttng_session_descriptor *session_descriptor) | |
1822 | { | |
1823 | enum lttng_error_code ret_code; | |
1824 | struct lttcomm_session_msg lsm = { | |
1825 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1826 | }; | |
1827 | void *reply = NULL; | |
1828 | struct lttng_buffer_view reply_view; | |
1829 | int reply_ret; | |
1830 | bool sessiond_must_generate_ouput; | |
1831 | struct lttng_dynamic_buffer payload; | |
1832 | int ret; | |
1833 | size_t descriptor_size; | |
1834 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1835 | ||
1836 | lttng_dynamic_buffer_init(&payload); | |
1837 | if (!session_descriptor) { | |
1838 | ret_code = LTTNG_ERR_INVALID; | |
1839 | goto end; | |
1840 | } | |
1841 | ||
1842 | sessiond_must_generate_ouput = | |
1843 | !lttng_session_descriptor_is_output_destination_initialized( | |
1844 | session_descriptor); | |
1845 | if (sessiond_must_generate_ouput) { | |
1846 | const char *home_dir = utils_get_home_dir(); | |
1847 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1848 | ||
1849 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1850 | ret_code = LTTNG_ERR_FATAL; | |
1851 | goto end; | |
1852 | } | |
1853 | ||
1854 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1855 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1856 | home_dir_len); | |
1857 | if (ret) { | |
1858 | ret_code = LTTNG_ERR_NOMEM; | |
1859 | goto end; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | descriptor_size = payload.size; | |
1864 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1865 | &payload); | |
1866 | if (ret) { | |
1867 | ret_code = LTTNG_ERR_INVALID; | |
1868 | goto end; | |
1869 | } | |
1870 | descriptor_size = payload.size - descriptor_size; | |
1871 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1872 | ||
1873 | /* Command returns a session descriptor on success. */ | |
1874 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1875 | payload.size, &reply); | |
1876 | if (reply_ret < 0) { | |
1877 | ret_code = -reply_ret; | |
1878 | goto end; | |
1879 | } else if (reply_ret == 0) { | |
1880 | /* Socket unexpectedly closed by the session daemon. */ | |
1881 | ret_code = LTTNG_ERR_FATAL; | |
1882 | goto end; | |
1883 | } | |
1884 | ||
1885 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1886 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1887 | &descriptor_reply); | |
1888 | if (ret < 0) { | |
1889 | ret_code = LTTNG_ERR_FATAL; | |
1890 | goto end; | |
1891 | } | |
1892 | ret_code = LTTNG_OK; | |
1893 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1894 | end: | |
1895 | free(reply); | |
1896 | lttng_dynamic_buffer_reset(&payload); | |
1897 | lttng_session_descriptor_destroy(descriptor_reply); | |
1898 | return ret_code; | |
1899 | } | |
1900 | ||
aaf97519 | 1901 | /* |
b178f53e | 1902 | * Create a new session using name and url for destination. |
a4b92340 | 1903 | * |
780d4bb8 | 1904 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1905 | */ |
a4b92340 | 1906 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1907 | { |
3dd05a85 | 1908 | int ret; |
a4b92340 | 1909 | ssize_t size; |
a4b92340 | 1910 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1911 | struct lttng_session_descriptor *descriptor = NULL; |
1912 | enum lttng_error_code ret_code; | |
00e2e675 | 1913 | |
b178f53e JG |
1914 | if (!name) { |
1915 | ret = -LTTNG_ERR_INVALID; | |
1916 | goto end; | |
00e2e675 DG |
1917 | } |
1918 | ||
bc894455 | 1919 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1920 | if (size < 0) { |
b178f53e JG |
1921 | ret = -LTTNG_ERR_INVALID; |
1922 | goto end; | |
1923 | } | |
1924 | switch (size) { | |
1925 | case 0: | |
1926 | descriptor = lttng_session_descriptor_create(name); | |
1927 | break; | |
1928 | case 1: | |
1929 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1930 | ret = -LTTNG_ERR_INVALID; | |
1931 | goto end; | |
1932 | } | |
1933 | descriptor = lttng_session_descriptor_local_create(name, | |
1934 | uris[0].dst.path); | |
1935 | break; | |
1936 | case 2: | |
1937 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1938 | NULL); | |
1939 | break; | |
1940 | default: | |
1941 | ret = -LTTNG_ERR_INVALID; | |
1942 | goto end; | |
1943 | } | |
1944 | if (!descriptor) { | |
1945 | ret = -LTTNG_ERR_INVALID; | |
1946 | goto end; | |
00e2e675 | 1947 | } |
b178f53e JG |
1948 | ret_code = lttng_create_session_ext(descriptor); |
1949 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1950 | end: | |
1951 | lttng_session_descriptor_destroy(descriptor); | |
1952 | free(uris); | |
1953 | return ret; | |
1954 | } | |
00e2e675 | 1955 | |
b178f53e JG |
1956 | /* |
1957 | * Create a session exclusively used for snapshot. | |
1958 | * | |
780d4bb8 | 1959 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1960 | */ |
1961 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1962 | { | |
1963 | int ret; | |
1964 | enum lttng_error_code ret_code; | |
1965 | ssize_t size; | |
1966 | struct lttng_uri *uris = NULL; | |
1967 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1968 | |
b178f53e JG |
1969 | if (!name) { |
1970 | ret = -LTTNG_ERR_INVALID; | |
1971 | goto end; | |
1972 | } | |
1973 | ||
1974 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1975 | if (size < 0) { | |
1976 | ret = -LTTNG_ERR_INVALID; | |
1977 | goto end; | |
1978 | } | |
1979 | /* | |
1980 | * If the user does not specify a custom subdir, use the session name. | |
1981 | */ | |
1982 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1983 | strlen(uris[0].subdir) == 0) { | |
1984 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1985 | name); | |
1986 | if (ret < 0) { | |
1987 | PERROR("Failed to set session name as network destination sub-directory"); | |
1988 | ret = -LTTNG_ERR_FATAL; | |
1989 | goto end; | |
1990 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1991 | /* Truncated output. */ | |
1992 | ret = -LTTNG_ERR_INVALID; | |
1993 | goto end; | |
1994 | } | |
1995 | } | |
3dd05a85 | 1996 | |
b178f53e JG |
1997 | switch (size) { |
1998 | case 0: | |
1999 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
2000 | break; | |
2001 | case 1: | |
2002 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
2003 | ret = -LTTNG_ERR_INVALID; | |
2004 | goto end; | |
2005 | } | |
2006 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
2007 | name, | |
2008 | uris[0].dst.path); | |
2009 | break; | |
2010 | case 2: | |
2011 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
2012 | name, | |
2013 | snapshot_url, | |
2014 | NULL); | |
2015 | break; | |
2016 | default: | |
2017 | ret = -LTTNG_ERR_INVALID; | |
2018 | goto end; | |
2019 | } | |
2020 | if (!descriptor) { | |
2021 | ret = -LTTNG_ERR_INVALID; | |
2022 | goto end; | |
2023 | } | |
2024 | ret_code = lttng_create_session_ext(descriptor); | |
2025 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2026 | end: | |
2027 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
2028 | free(uris); |
2029 | return ret; | |
00e2e675 DG |
2030 | } |
2031 | ||
b178f53e JG |
2032 | /* |
2033 | * Create a session exclusively used for live. | |
2034 | * | |
780d4bb8 | 2035 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2036 | */ |
2037 | int lttng_create_session_live(const char *name, const char *url, | |
2038 | unsigned int timer_interval) | |
2039 | { | |
2040 | int ret; | |
2041 | enum lttng_error_code ret_code; | |
2042 | struct lttng_session_descriptor *descriptor = NULL; | |
2043 | ||
2044 | if (!name) { | |
2045 | ret = -LTTNG_ERR_INVALID; | |
2046 | goto end; | |
2047 | } | |
2048 | ||
2049 | if (url) { | |
2050 | descriptor = lttng_session_descriptor_live_network_create( | |
2051 | name, url, NULL, timer_interval); | |
2052 | } else { | |
2053 | descriptor = lttng_session_descriptor_live_create( | |
2054 | name, timer_interval); | |
2055 | } | |
2056 | if (!descriptor) { | |
2057 | ret = -LTTNG_ERR_INVALID; | |
2058 | goto end; | |
2059 | } | |
2060 | ret_code = lttng_create_session_ext(descriptor); | |
2061 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2062 | end: | |
2063 | lttng_session_descriptor_destroy(descriptor); | |
2064 | return ret; | |
2065 | } | |
2066 | ||
e20ee7c2 JD |
2067 | /* |
2068 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2069 | * |
2070 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2071 | */ |
2072 | int lttng_destroy_session(const char *session_name) | |
2073 | { | |
2074 | int ret; | |
3e3665b8 JG |
2075 | enum lttng_error_code ret_code; |
2076 | enum lttng_destruction_handle_status status; | |
2077 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2078 | |
2079 | /* | |
3e3665b8 JG |
2080 | * Stop the tracing and wait for the data to be |
2081 | * consumed. | |
e20ee7c2 JD |
2082 | */ |
2083 | ret = _lttng_stop_tracing(session_name, 1); | |
2084 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2085 | goto end; | |
2086 | } | |
2087 | ||
3e3665b8 JG |
2088 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2089 | if (ret_code != LTTNG_OK) { | |
2090 | ret = (int) -ret_code; | |
2091 | goto end; | |
2092 | } | |
2093 | assert(handle); | |
2094 | ||
2095 | /* Block until the completion of the destruction of the session. */ | |
2096 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2097 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2098 | ret = -LTTNG_ERR_UNK; | |
2099 | goto end; | |
2100 | } | |
2101 | ||
2102 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2103 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2104 | ret = -LTTNG_ERR_UNK; | |
2105 | goto end; | |
2106 | } | |
780d4bb8 | 2107 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2108 | end: |
3e3665b8 | 2109 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2110 | return ret; |
2111 | } | |
2112 | ||
2113 | /* | |
2114 | * Destroy the session without waiting for the data. | |
2115 | */ | |
2116 | int lttng_destroy_session_no_wait(const char *session_name) | |
2117 | { | |
3e3665b8 | 2118 | enum lttng_error_code ret_code; |
e20ee7c2 | 2119 | |
3e3665b8 | 2120 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
3204017e | 2121 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2122 | } |
2123 | ||
57167058 | 2124 | /* |
9ae110e2 JG |
2125 | * Ask the session daemon for all available sessions. |
2126 | * Sets the contents of the sessions array. | |
2127 | * Returns the number of lttng_session entries in sessions; | |
2128 | * on error, returns a negative value. | |
57167058 | 2129 | */ |
b178f53e | 2130 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2131 | { |
ca95a216 | 2132 | int ret; |
cd80958d | 2133 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2134 | const size_t session_size = sizeof(struct lttng_session) + |
2135 | sizeof(struct lttng_session_extended); | |
2136 | size_t session_count, i; | |
2137 | struct lttng_session_extended *sessions_extended_begin; | |
2138 | struct lttng_session *sessions = NULL; | |
57167058 | 2139 | |
53efb85a | 2140 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2141 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
e8a09c09 MD |
2142 | /* |
2143 | * Initialize out_sessions to NULL so it is initialized when | |
2144 | * lttng_list_sessions returns 0, thus allowing *out_sessions to | |
2145 | * be subsequently freed. | |
2146 | */ | |
2147 | *out_sessions = NULL; | |
b178f53e JG |
2148 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2149 | if (ret <= 0) { | |
b178f53e JG |
2150 | goto end; |
2151 | } | |
2152 | if (!sessions) { | |
2153 | ret = -LTTNG_ERR_FATAL; | |
2154 | goto end; | |
2155 | } | |
2156 | ||
2157 | if (ret % session_size) { | |
2158 | ret = -LTTNG_ERR_UNK; | |
2159 | free(sessions); | |
b178f53e | 2160 | goto end; |
57167058 | 2161 | } |
b178f53e JG |
2162 | session_count = (size_t) ret / session_size; |
2163 | sessions_extended_begin = (struct lttng_session_extended *) | |
2164 | (&sessions[session_count]); | |
57167058 | 2165 | |
b178f53e JG |
2166 | /* Set extended session info pointers. */ |
2167 | for (i = 0; i < session_count; i++) { | |
2168 | struct lttng_session *session = &sessions[i]; | |
2169 | struct lttng_session_extended *extended = | |
2170 | &(sessions_extended_begin[i]); | |
2171 | ||
2172 | session->extended.ptr = extended; | |
2173 | } | |
2174 | ||
2175 | ret = (int) session_count; | |
2176 | *out_sessions = sessions; | |
2177 | end: | |
2178 | return ret; | |
2179 | } | |
2180 | ||
2181 | enum lttng_error_code lttng_session_get_creation_time( | |
2182 | const struct lttng_session *session, uint64_t *creation_time) | |
2183 | { | |
2184 | enum lttng_error_code ret = LTTNG_OK; | |
2185 | struct lttng_session_extended *extended; | |
2186 | ||
2187 | if (!session || !creation_time || !session->extended.ptr) { | |
2188 | ret = LTTNG_ERR_INVALID; | |
2189 | goto end; | |
2190 | } | |
2191 | ||
2192 | extended = session->extended.ptr; | |
2193 | if (!extended->creation_time.is_set) { | |
2194 | /* Not created on the session daemon yet. */ | |
2195 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2196 | goto end; | |
2197 | } | |
2198 | *creation_time = extended->creation_time.value; | |
2199 | end: | |
2200 | return ret; | |
57167058 DG |
2201 | } |
2202 | ||
d7ba1388 MD |
2203 | int lttng_set_session_shm_path(const char *session_name, |
2204 | const char *shm_path) | |
2205 | { | |
e1b624d0 | 2206 | int ret; |
d7ba1388 MD |
2207 | struct lttcomm_session_msg lsm; |
2208 | ||
2209 | if (session_name == NULL) { | |
2210 | return -LTTNG_ERR_INVALID; | |
2211 | } | |
2212 | ||
2213 | memset(&lsm, 0, sizeof(lsm)); | |
2214 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2215 | ||
e1b624d0 | 2216 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2217 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2218 | if (ret) { |
2219 | ret = -LTTNG_ERR_INVALID; | |
2220 | goto end; | |
2221 | } | |
2222 | ||
2223 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2224 | sizeof(lsm.u.set_shm_path.shm_path)); |
e1b624d0 JG |
2225 | if (ret) { |
2226 | ret = -LTTNG_ERR_INVALID; | |
2227 | goto end; | |
2228 | } | |
d7ba1388 | 2229 | |
e1b624d0 JG |
2230 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2231 | end: | |
2232 | return ret; | |
d7ba1388 MD |
2233 | } |
2234 | ||
9f19cc17 | 2235 | /* |
9ae110e2 JG |
2236 | * Ask the session daemon for all available domains of a session. |
2237 | * Sets the contents of the domains array. | |
2238 | * Returns the number of lttng_domain entries in domains; | |
2239 | * on error, returns a negative value. | |
9f19cc17 | 2240 | */ |
330be774 | 2241 | int lttng_list_domains(const char *session_name, |
cd80958d | 2242 | struct lttng_domain **domains) |
9f19cc17 DG |
2243 | { |
2244 | int ret; | |
cd80958d DG |
2245 | struct lttcomm_session_msg lsm; |
2246 | ||
330be774 | 2247 | if (session_name == NULL) { |
e1b624d0 JG |
2248 | ret = -LTTNG_ERR_INVALID; |
2249 | goto error; | |
cd80958d | 2250 | } |
9f19cc17 | 2251 | |
53efb85a | 2252 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2253 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2254 | ||
e1b624d0 | 2255 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2256 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2257 | if (ret) { |
2258 | ret = -LTTNG_ERR_INVALID; | |
2259 | goto error; | |
2260 | } | |
cd80958d | 2261 | |
cac3069d | 2262 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2263 | if (ret < 0) { |
e1b624d0 | 2264 | goto error; |
9f19cc17 DG |
2265 | } |
2266 | ||
2267 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2268 | error: |
2269 | return ret; | |
9f19cc17 DG |
2270 | } |
2271 | ||
2272 | /* | |
9ae110e2 JG |
2273 | * Ask the session daemon for all available channels of a session. |
2274 | * Sets the contents of the channels array. | |
2275 | * Returns the number of lttng_channel entries in channels; | |
2276 | * on error, returns a negative value. | |
9f19cc17 | 2277 | */ |
cd80958d DG |
2278 | int lttng_list_channels(struct lttng_handle *handle, |
2279 | struct lttng_channel **channels) | |
9f19cc17 | 2280 | { |
714363d3 | 2281 | int ret, total_payload_received; |
cd80958d | 2282 | struct lttcomm_session_msg lsm; |
714363d3 JR |
2283 | char *reception_buffer = NULL; |
2284 | size_t cmd_header_len = 0; | |
2285 | struct lttcomm_list_command_header *cmd_header = NULL; | |
2286 | struct lttng_dynamic_buffer tmp_buffer; | |
2287 | ||
2288 | lttng_dynamic_buffer_init(&tmp_buffer); | |
cd80958d | 2289 | |
9d697d3d | 2290 | if (handle == NULL) { |
53e367f9 JG |
2291 | ret = -LTTNG_ERR_INVALID; |
2292 | goto end; | |
cd80958d DG |
2293 | } |
2294 | ||
53efb85a | 2295 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2296 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
e1b624d0 | 2297 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2298 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2299 | if (ret) { |
2300 | ret = -LTTNG_ERR_INVALID; | |
2301 | goto end; | |
2302 | } | |
9f19cc17 | 2303 | |
60160d2a | 2304 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2305 | |
714363d3 JR |
2306 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
2307 | (void **) &reception_buffer, (void **) &cmd_header, | |
2308 | &cmd_header_len); | |
9f19cc17 | 2309 | if (ret < 0) { |
53e367f9 JG |
2310 | goto end; |
2311 | } | |
2312 | ||
714363d3 JR |
2313 | total_payload_received = ret; |
2314 | ||
2315 | if (cmd_header_len != sizeof(*cmd_header)) { | |
2316 | ret = -LTTNG_ERR_FATAL; | |
53e367f9 | 2317 | goto end; |
9f19cc17 DG |
2318 | } |
2319 | ||
714363d3 JR |
2320 | if (!cmd_header) { |
2321 | ret = LTTNG_ERR_UNK; | |
2322 | goto end; | |
2323 | } | |
2324 | ||
2325 | if (cmd_header->count > INT_MAX) { | |
2326 | ret = -LTTNG_ERR_OVERFLOW; | |
2327 | goto end; | |
2328 | } | |
53e367f9 | 2329 | |
714363d3 JR |
2330 | { |
2331 | enum lttng_error_code ret_code; | |
2332 | const struct lttng_buffer_view events_view = | |
2333 | lttng_buffer_view_init(reception_buffer, 0, | |
2334 | total_payload_received); | |
2335 | ||
2336 | ret_code = lttng_channels_create_and_flatten_from_buffer( | |
2337 | &events_view, cmd_header->count, channels); | |
2338 | if (ret_code != LTTNG_OK) { | |
2339 | ret = -ret_code; | |
2340 | goto end; | |
2341 | } | |
53e367f9 JG |
2342 | } |
2343 | ||
714363d3 | 2344 | ret = (int) cmd_header->count; |
53e367f9 | 2345 | end: |
714363d3 JR |
2346 | free(cmd_header); |
2347 | free(reception_buffer); | |
53e367f9 | 2348 | return ret; |
9f19cc17 DG |
2349 | } |
2350 | ||
2351 | /* | |
9ae110e2 JG |
2352 | * Ask the session daemon for all available events of a session channel. |
2353 | * Sets the contents of the events array. | |
2354 | * Returns the number of lttng_event entries in events; | |
2355 | * on error, returns a negative value. | |
9f19cc17 | 2356 | */ |
cd80958d DG |
2357 | int lttng_list_events(struct lttng_handle *handle, |
2358 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2359 | { |
2360 | int ret; | |
e368fb43 | 2361 | struct lttcomm_session_msg lsm = {}; |
fe5e9e65 | 2362 | struct lttng_payload reply; |
e368fb43 JG |
2363 | struct lttng_payload_view lsm_view = |
2364 | lttng_payload_view_init_from_buffer( | |
2365 | (const char *) &lsm, 0, sizeof(lsm)); | |
fe5e9e65 | 2366 | unsigned int nb_events = 0; |
9f19cc17 | 2367 | |
fe5e9e65 | 2368 | /* Safety check. An handle and channel name are mandatory. */ |
9d697d3d | 2369 | if (handle == NULL || channel_name == NULL) { |
e368fb43 JG |
2370 | ret = -LTTNG_ERR_INVALID; |
2371 | goto end; | |
cd80958d DG |
2372 | } |
2373 | ||
fe5e9e65 | 2374 | lttng_payload_init(&reply); |
e368fb43 | 2375 | |
fe5e9e65 | 2376 | /* Initialize command parameters. */ |
cd80958d | 2377 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
e1b624d0 | 2378 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2379 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2380 | if (ret) { |
2381 | ret = -LTTNG_ERR_INVALID; | |
2382 | goto end; | |
2383 | } | |
2384 | ||
2385 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2386 | sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2387 | if (ret) { |
2388 | ret = -LTTNG_ERR_INVALID; | |
2389 | goto end; | |
2390 | } | |
2391 | ||
60160d2a | 2392 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2393 | |
fe5e9e65 JR |
2394 | /* Execute command against the session daemon. */ |
2395 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
9f19cc17 | 2396 | if (ret < 0) { |
de453daa | 2397 | goto end; |
9f19cc17 DG |
2398 | } |
2399 | ||
e368fb43 | 2400 | { |
fe5e9e65 JR |
2401 | const struct lttcomm_list_command_header *cmd_reply_header = |
2402 | NULL; | |
2403 | const struct lttng_payload_view cmd_reply_header_view = | |
2404 | lttng_payload_view_from_payload(&reply, 0, | |
2405 | sizeof(*cmd_reply_header)); | |
2406 | ||
2407 | if (!lttng_payload_view_is_valid(&cmd_reply_header_view)) { | |
2408 | ret = -LTTNG_ERR_INVALID_PROTOCOL; | |
2409 | goto end; | |
56f0bc67 | 2410 | } |
b4e3ceb9 | 2411 | |
fe5e9e65 JR |
2412 | cmd_reply_header = (const struct lttcomm_list_command_header *) |
2413 | cmd_reply_header_view.buffer | |
2414 | .data; | |
2415 | if (cmd_reply_header->count > INT_MAX) { | |
2416 | ret = -LTTNG_ERR_OVERFLOW; | |
2417 | goto end; | |
2418 | } | |
56f0bc67 | 2419 | |
fe5e9e65 | 2420 | nb_events = (unsigned int) cmd_reply_header->count; |
56f0bc67 | 2421 | } |
de453daa | 2422 | |
e368fb43 | 2423 | { |
fe5e9e65 JR |
2424 | enum lttng_error_code ret_code; |
2425 | struct lttng_payload_view cmd_reply_payload = lttng_payload_view_from_payload( | |
2426 | &reply, | |
2427 | sizeof(struct lttcomm_list_command_header), -1); | |
56f0bc67 | 2428 | |
fe5e9e65 JR |
2429 | ret_code = lttng_events_create_and_flatten_from_payload( |
2430 | &cmd_reply_payload, nb_events, events); | |
2431 | if (ret_code != LTTNG_OK) { | |
2432 | ret = -((int) ret_code); | |
2433 | goto end; | |
56f0bc67 | 2434 | } |
de453daa JG |
2435 | } |
2436 | ||
de453daa JG |
2437 | ret = (int) nb_events; |
2438 | end: | |
fe5e9e65 | 2439 | lttng_payload_reset(&reply); |
b4e3ceb9 | 2440 | return ret; |
9f19cc17 DG |
2441 | } |
2442 | ||
fac6795d | 2443 | /* |
1c8d13c8 TD |
2444 | * Sets the tracing_group variable with name. |
2445 | * This function allocates memory pointed to by tracing_group. | |
2446 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2447 | */ |
2448 | int lttng_set_tracing_group(const char *name) | |
2449 | { | |
d1892e1a | 2450 | char *new_group; |
9d697d3d | 2451 | if (name == NULL) { |
2f70b271 | 2452 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2453 | } |
2454 | ||
d1892e1a | 2455 | if (asprintf(&new_group, "%s", name) < 0) { |
2f70b271 | 2456 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2457 | } |
2458 | ||
d1892e1a JR |
2459 | free(tracing_group); |
2460 | tracing_group = new_group; | |
2461 | new_group = NULL; | |
2462 | ||
fac6795d DG |
2463 | return 0; |
2464 | } | |
2465 | ||
cd80958d | 2466 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2467 | struct lttng_calibrate *calibrate) |
2468 | { | |
b812e5ca PP |
2469 | /* |
2470 | * This command was removed in LTTng 2.9. | |
2471 | */ | |
2472 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2473 | } |
2474 | ||
5edd7e09 DG |
2475 | /* |
2476 | * Set default channel attributes. | |
441c16a7 | 2477 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2478 | */ |
2479 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2480 | struct lttng_channel_attr *attr) | |
2481 | { | |
294851b0 | 2482 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2483 | |
5edd7e09 DG |
2484 | /* Safety check */ |
2485 | if (attr == NULL || domain == NULL) { | |
2486 | return; | |
2487 | } | |
2488 | ||
714363d3 | 2489 | /* Save the pointer for later use */ |
294851b0 | 2490 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2491 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2492 | ||
0a9c6494 DG |
2493 | /* Same for all domains. */ |
2494 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2495 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2496 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2497 | ||
5edd7e09 DG |
2498 | switch (domain->type) { |
2499 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2500 | attr->switch_timer_interval = |
2501 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2502 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2503 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2504 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2505 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
2506 | break; | |
2507 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2508 | switch (domain->buf_type) { |
2509 | case LTTNG_BUFFER_PER_UID: | |
2510 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2511 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2512 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2513 | attr->switch_timer_interval = |
2514 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2515 | attr->read_timer_interval = | |
2516 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2517 | break; |
2518 | case LTTNG_BUFFER_PER_PID: | |
2519 | default: | |
2520 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2521 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2522 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2523 | attr->switch_timer_interval = |
2524 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2525 | attr->read_timer_interval = | |
2526 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2527 | break; |
2528 | } | |
5edd7e09 | 2529 | default: |
441c16a7 | 2530 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2531 | break; |
2532 | } | |
cf0bcb51 | 2533 | |
714363d3 JR |
2534 | if (extended) { |
2535 | lttng_channel_set_default_extended_attr(domain, extended); | |
2536 | } | |
2537 | ||
2538 | /* Reassign the extended pointer. */ | |
cf0bcb51 | 2539 | attr->extended.ptr = extended; |
5edd7e09 DG |
2540 | } |
2541 | ||
5ba3702f JG |
2542 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2543 | uint64_t *discarded_events) | |
2544 | { | |
2545 | int ret = 0; | |
cf0bcb51 | 2546 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2547 | |
2548 | if (!channel || !discarded_events) { | |
2549 | ret = -LTTNG_ERR_INVALID; | |
2550 | goto end; | |
2551 | } | |
2552 | ||
2553 | chan_ext = channel->attr.extended.ptr; | |
2554 | if (!chan_ext) { | |
2555 | /* | |
2556 | * This can happen since the lttng_channel structure is | |
2557 | * used for other tasks where this pointer is never set. | |
2558 | */ | |
2559 | *discarded_events = 0; | |
2560 | goto end; | |
2561 | } | |
2562 | ||
2563 | *discarded_events = chan_ext->discarded_events; | |
2564 | end: | |
2565 | return ret; | |
2566 | } | |
2567 | ||
2568 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2569 | uint64_t *lost_packets) | |
2570 | { | |
2571 | int ret = 0; | |
cf0bcb51 | 2572 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2573 | |
2574 | if (!channel || !lost_packets) { | |
2575 | ret = -LTTNG_ERR_INVALID; | |
2576 | goto end; | |
2577 | } | |
2578 | ||
2579 | chan_ext = channel->attr.extended.ptr; | |
2580 | if (!chan_ext) { | |
2581 | /* | |
2582 | * This can happen since the lttng_channel structure is | |
2583 | * used for other tasks where this pointer is never set. | |
2584 | */ | |
2585 | *lost_packets = 0; | |
2586 | goto end; | |
2587 | } | |
2588 | ||
2589 | *lost_packets = chan_ext->lost_packets; | |
2590 | end: | |
2591 | return ret; | |
2592 | } | |
2593 | ||
cf0bcb51 JG |
2594 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2595 | uint64_t *monitor_timer_interval) | |
2596 | { | |
2597 | int ret = 0; | |
2598 | ||
2599 | if (!chan || !monitor_timer_interval) { | |
2600 | ret = -LTTNG_ERR_INVALID; | |
2601 | goto end; | |
2602 | } | |
2603 | ||
2604 | if (!chan->attr.extended.ptr) { | |
2605 | ret = -LTTNG_ERR_INVALID; | |
2606 | goto end; | |
2607 | } | |
2608 | ||
2609 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2610 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2611 | end: | |
2612 | return ret; | |
2613 | } | |
2614 | ||
2615 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2616 | uint64_t monitor_timer_interval) | |
2617 | { | |
2618 | int ret = 0; | |
2619 | ||
2620 | if (!chan || !chan->attr.extended.ptr) { | |
2621 | ret = -LTTNG_ERR_INVALID; | |
2622 | goto end; | |
2623 | } | |
2624 | ||
2625 | ((struct lttng_channel_extended *) | |
2626 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2627 | monitor_timer_interval; | |
2628 | end: | |
2629 | return ret; | |
2630 | } | |
2631 | ||
491d1539 MD |
2632 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2633 | int64_t *blocking_timeout) | |
2634 | { | |
2635 | int ret = 0; | |
2636 | ||
2637 | if (!chan || !blocking_timeout) { | |
2638 | ret = -LTTNG_ERR_INVALID; | |
2639 | goto end; | |
2640 | } | |
2641 | ||
2642 | if (!chan->attr.extended.ptr) { | |
2643 | ret = -LTTNG_ERR_INVALID; | |
2644 | goto end; | |
2645 | } | |
2646 | ||
2647 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2648 | chan->attr.extended.ptr)->blocking_timeout; | |
2649 | end: | |
2650 | return ret; | |
2651 | } | |
2652 | ||
2653 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2654 | int64_t blocking_timeout) | |
2655 | { | |
2656 | int ret = 0; | |
2657 | int64_t msec_timeout; | |
2658 | ||
2659 | if (!chan || !chan->attr.extended.ptr) { | |
2660 | ret = -LTTNG_ERR_INVALID; | |
2661 | goto end; | |
2662 | } | |
2663 | ||
2664 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2665 | ret = -LTTNG_ERR_INVALID; | |
2666 | goto end; | |
2667 | } | |
2668 | ||
2669 | /* | |
2670 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2671 | * us to accept a narrower range of values (msecs expressed as a signed | |
2672 | * 32-bit integer). | |
2673 | */ | |
2674 | msec_timeout = blocking_timeout / 1000; | |
2675 | if (msec_timeout != (int32_t) msec_timeout) { | |
2676 | ret = -LTTNG_ERR_INVALID; | |
2677 | goto end; | |
2678 | } | |
2679 | ||
2680 | ((struct lttng_channel_extended *) | |
2681 | chan->attr.extended.ptr)->blocking_timeout = | |
2682 | blocking_timeout; | |
2683 | end: | |
2684 | return ret; | |
2685 | } | |
2686 | ||
fac6795d | 2687 | /* |
2269e89e | 2688 | * Check if session daemon is alive. |
fac6795d | 2689 | * |
2269e89e | 2690 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2691 | * On error returns a negative value. |
fac6795d | 2692 | */ |
947308c4 | 2693 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2694 | { |
2695 | int ret; | |
2696 | ||
2697 | ret = set_session_daemon_path(); | |
2698 | if (ret < 0) { | |
9ae110e2 | 2699 | /* Error. */ |
fac6795d DG |
2700 | return ret; |
2701 | } | |
2702 | ||
9d035200 | 2703 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2704 | /* |
9ae110e2 JG |
2705 | * No socket path set. Weird error which means the constructor |
2706 | * was not called. | |
2f70b271 DG |
2707 | */ |
2708 | assert(0); | |
fac6795d DG |
2709 | } |
2710 | ||
2269e89e | 2711 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2712 | if (ret < 0) { |
9ae110e2 | 2713 | /* Not alive. */ |
7d8234d9 MD |
2714 | return 0; |
2715 | } | |
7d8234d9 | 2716 | |
9ae110e2 | 2717 | /* Is alive. */ |
947308c4 | 2718 | return 1; |
fac6795d DG |
2719 | } |
2720 | ||
00e2e675 | 2721 | /* |
a4b92340 | 2722 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2723 | * |
2724 | * Return 0 on success, else a negative value. | |
2725 | */ | |
a4b92340 DG |
2726 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2727 | const char *control_url, const char *data_url) | |
00e2e675 | 2728 | { |
3dd05a85 | 2729 | int ret; |
a4b92340 | 2730 | ssize_t size; |
00e2e675 | 2731 | struct lttcomm_session_msg lsm; |
a4b92340 | 2732 | struct lttng_uri *uris = NULL; |
00e2e675 | 2733 | |
a4b92340 | 2734 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
e1b624d0 JG |
2735 | ret = -LTTNG_ERR_INVALID; |
2736 | goto error; | |
00e2e675 DG |
2737 | } |
2738 | ||
a4b92340 DG |
2739 | memset(&lsm, 0, sizeof(lsm)); |
2740 | ||
00e2e675 DG |
2741 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2742 | ||
e1b624d0 | 2743 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 2744 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2745 | if (ret) { |
2746 | ret = -LTTNG_ERR_INVALID; | |
2747 | goto error; | |
2748 | } | |
2749 | ||
60160d2a | 2750 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2751 | |
bc894455 | 2752 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2753 | if (size < 0) { |
e1b624d0 JG |
2754 | ret = -LTTNG_ERR_INVALID; |
2755 | goto error; | |
a4b92340 DG |
2756 | } |
2757 | ||
2758 | lsm.u.uri.size = size; | |
00e2e675 | 2759 | |
795a978d | 2760 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2761 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2762 | |
2763 | free(uris); | |
e1b624d0 | 2764 | error: |
3dd05a85 | 2765 | return ret; |
00e2e675 DG |
2766 | } |
2767 | ||
2768 | /* | |
9c6bda17 | 2769 | * [OBSOLETE] |
00e2e675 | 2770 | */ |
2ec40111 | 2771 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2772 | int lttng_enable_consumer(struct lttng_handle *handle) |
2773 | { | |
785d2d0d | 2774 | return -ENOSYS; |
00e2e675 DG |
2775 | } |
2776 | ||
2777 | /* | |
9c6bda17 | 2778 | * [OBSOLETE] |
00e2e675 | 2779 | */ |
2ec40111 | 2780 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2781 | int lttng_disable_consumer(struct lttng_handle *handle) |
2782 | { | |
785d2d0d | 2783 | return -ENOSYS; |
00e2e675 DG |
2784 | } |
2785 | ||
07424f16 | 2786 | /* |
b178f53e | 2787 | * [OBSOLETE] |
07424f16 | 2788 | */ |
2ec40111 SM |
2789 | int _lttng_create_session_ext(const char *name, const char *url, |
2790 | const char *datetime); | |
07424f16 DG |
2791 | int _lttng_create_session_ext(const char *name, const char *url, |
2792 | const char *datetime) | |
2793 | { | |
b178f53e | 2794 | return -ENOSYS; |
07424f16 DG |
2795 | } |
2796 | ||
806e2684 DG |
2797 | /* |
2798 | * For a given session name, this call checks if the data is ready to be read | |
2799 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2800 | * any readers. | |
2801 | */ | |
6d805429 | 2802 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2803 | { |
2804 | int ret; | |
2805 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2806 | uint8_t *pending = NULL; |
806e2684 DG |
2807 | |
2808 | if (session_name == NULL) { | |
2809 | return -LTTNG_ERR_INVALID; | |
2810 | } | |
2811 | ||
53efb85a | 2812 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2813 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2814 | |
e1b624d0 | 2815 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2816 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2817 | if (ret) { |
2818 | ret = -LTTNG_ERR_INVALID; | |
2819 | goto end; | |
2820 | } | |
806e2684 | 2821 | |
f6151c55 JG |
2822 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2823 | if (ret < 0) { | |
2824 | goto end; | |
2825 | } else if (ret != 1) { | |
2826 | /* Unexpected payload size */ | |
2827 | ret = -LTTNG_ERR_INVALID; | |
2828 | goto end; | |
e848d36d JG |
2829 | } else if (!pending) { |
2830 | /* Internal error. */ | |
2831 | ret = -LTTNG_ERR_UNK; | |
2832 | goto end; | |
806e2684 DG |
2833 | } |
2834 | ||
f6151c55 JG |
2835 | ret = (int) *pending; |
2836 | end: | |
2837 | free(pending); | |
806e2684 DG |
2838 | return ret; |
2839 | } | |
2840 | ||
93ec662e JD |
2841 | /* |
2842 | * Regenerate the metadata for a session. | |
2843 | * Return 0 on success, a negative error code on error. | |
2844 | */ | |
eded6438 | 2845 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2846 | { |
2847 | int ret; | |
2848 | struct lttcomm_session_msg lsm; | |
2849 | ||
2850 | if (!session_name) { | |
2851 | ret = -LTTNG_ERR_INVALID; | |
2852 | goto end; | |
2853 | } | |
2854 | ||
2855 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2856 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 2857 | |
e1b624d0 | 2858 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 2859 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2860 | if (ret) { |
2861 | ret = -LTTNG_ERR_INVALID; | |
2862 | goto end; | |
2863 | } | |
93ec662e JD |
2864 | |
2865 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2866 | if (ret < 0) { | |
2867 | goto end; | |
2868 | } | |
2869 | ||
2870 | ret = 0; | |
2871 | end: | |
2872 | return ret; | |
2873 | } | |
2874 | ||
eded6438 JD |
2875 | /* |
2876 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2877 | */ | |
2878 | int lttng_metadata_regenerate(const char *session_name) | |
2879 | { | |
2880 | return lttng_regenerate_metadata(session_name); | |
2881 | } | |
2882 | ||
c2561365 JD |
2883 | /* |
2884 | * Regenerate the statedump of a session. | |
2885 | * Return 0 on success, a negative error code on error. | |
2886 | */ | |
2887 | int lttng_regenerate_statedump(const char *session_name) | |
2888 | { | |
2889 | int ret; | |
2890 | struct lttcomm_session_msg lsm; | |
2891 | ||
2892 | if (!session_name) { | |
2893 | ret = -LTTNG_ERR_INVALID; | |
2894 | goto end; | |
2895 | } | |
2896 | ||
2897 | memset(&lsm, 0, sizeof(lsm)); | |
2898 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2899 | ||
e1b624d0 | 2900 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 2901 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2902 | if (ret) { |
2903 | ret = -LTTNG_ERR_INVALID; | |
2904 | goto end; | |
2905 | } | |
c2561365 JD |
2906 | |
2907 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2908 | if (ret < 0) { | |
2909 | goto end; | |
2910 | } | |
2911 | ||
2912 | ret = 0; | |
2913 | end: | |
2914 | return ret; | |
2915 | } | |
2916 | ||
a5c2d2a7 JG |
2917 | static |
2918 | int _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, | |
2919 | bool generate_name) | |
a58c490f JG |
2920 | { |
2921 | int ret; | |
99608320 JR |
2922 | struct lttcomm_session_msg lsm = { |
2923 | .cmd_type = LTTNG_REGISTER_TRIGGER, | |
a5c2d2a7 | 2924 | .u.trigger.is_trigger_anonymous = !name && !generate_name, |
99608320 JR |
2925 | }; |
2926 | struct lttcomm_session_msg *message_lsm; | |
2927 | struct lttng_payload message; | |
2928 | struct lttng_payload reply; | |
242388e4 | 2929 | struct lttng_trigger *reply_trigger = NULL; |
9124c630 | 2930 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
2931 | const struct lttng_credentials user_creds = { |
2932 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
2933 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
2934 | }; | |
a5c2d2a7 JG |
2935 | const char *unused_trigger_name = NULL; |
2936 | enum lttng_trigger_status trigger_status; | |
99608320 JR |
2937 | |
2938 | lttng_payload_init(&message); | |
2939 | lttng_payload_init(&reply); | |
a58c490f JG |
2940 | |
2941 | if (!trigger) { | |
2942 | ret = -LTTNG_ERR_INVALID; | |
2943 | goto end; | |
2944 | } | |
2945 | ||
a5c2d2a7 JG |
2946 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
2947 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
2948 | /* Re-using already registered trigger. */ | |
2949 | ret = -LTTNG_ERR_INVALID; | |
2950 | goto end; | |
2951 | } | |
2952 | ||
2953 | if (name) { | |
2954 | trigger_status = lttng_trigger_set_name(trigger, name); | |
2955 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
2956 | ret = -LTTNG_ERR_NOMEM; | |
2957 | goto end; | |
2958 | } | |
2959 | } | |
2960 | ||
64eafdf6 JR |
2961 | if (!trigger->creds.uid.is_set) { |
2962 | /* Use the client's credentials as the trigger credentials. */ | |
2963 | lttng_trigger_set_credentials(trigger, &user_creds); | |
2964 | } else { | |
2965 | /* | |
2966 | * Validate that either the current trigger credentials and the | |
2967 | * client credentials are identical or that the current user is | |
2968 | * root. The root user can register, unregister triggers for | |
2969 | * himself and other users. | |
2970 | * | |
2971 | * This check is also present on the sessiond side, using the | |
2972 | * credentials passed on the socket. These check are all | |
2973 | * "safety" checks. | |
2974 | */ | |
2975 | const struct lttng_credentials *trigger_creds = | |
2976 | lttng_trigger_get_credentials(trigger); | |
2977 | ||
2978 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
2979 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
2980 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 2981 | goto end_unset_name; |
64eafdf6 JR |
2982 | } |
2983 | } | |
2984 | } | |
2985 | ||
a58c490f | 2986 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 2987 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 2988 | goto end_unset_name; |
a58c490f JG |
2989 | } |
2990 | ||
9124c630 JR |
2991 | domain_type = lttng_trigger_get_underlying_domain_type_restriction( |
2992 | trigger); | |
2993 | ||
2994 | lsm.domain.type = domain_type; | |
2995 | ||
97285430 JG |
2996 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
2997 | if (ret) { | |
2998 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 2999 | goto end_unset_name; |
97285430 | 3000 | } |
99608320 | 3001 | |
99608320 | 3002 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3003 | if (ret < 0) { |
a58c490f | 3004 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3005 | goto end_unset_name; |
a58c490f JG |
3006 | } |
3007 | ||
b22f4f54 JG |
3008 | /* |
3009 | * This is needed to populate the trigger object size for the command | |
3010 | * header. | |
3011 | */ | |
3012 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3013 | ||
99608320 JR |
3014 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3015 | ||
3016 | { | |
3017 | struct lttng_payload_view message_view = | |
3018 | lttng_payload_view_from_payload( | |
3019 | &message, 0, -1); | |
3020 | ||
3021 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3022 | &message_view); | |
3023 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3024 | if (ret < 0) { | |
a5c2d2a7 | 3025 | goto end_unset_name; |
99608320 JR |
3026 | } |
3027 | } | |
3028 | ||
242388e4 JR |
3029 | { |
3030 | struct lttng_payload_view reply_view = | |
3031 | lttng_payload_view_from_payload( | |
3032 | &reply, 0, reply.buffer.size); | |
3033 | ||
3034 | ret = lttng_trigger_create_from_payload( | |
3035 | &reply_view, &reply_trigger); | |
3036 | if (ret < 0) { | |
a5c2d2a7 JG |
3037 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3038 | goto end_unset_name; | |
242388e4 JR |
3039 | } |
3040 | } | |
3041 | ||
a5c2d2a7 JG |
3042 | if (name || generate_name) { |
3043 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3044 | if (ret < 0) { | |
3045 | ret = -LTTNG_ERR_NOMEM; | |
3046 | goto end; | |
3047 | } | |
242388e4 JR |
3048 | } |
3049 | ||
99608320 | 3050 | ret = 0; |
a5c2d2a7 JG |
3051 | goto end; |
3052 | ||
3053 | end_unset_name: | |
3054 | trigger_status = lttng_trigger_set_name(trigger, NULL); | |
3055 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3056 | ret = -LTTNG_ERR_UNK; | |
3057 | } | |
a58c490f | 3058 | end: |
99608320 JR |
3059 | lttng_payload_reset(&message); |
3060 | lttng_payload_reset(&reply); | |
242388e4 | 3061 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3062 | return ret; |
3063 | } | |
3064 | ||
a5c2d2a7 JG |
3065 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3066 | { | |
3067 | /* Register an anonymous trigger. */ | |
3068 | return _lttng_register_trigger(trigger, NULL, false); | |
3069 | } | |
3070 | ||
3071 | enum lttng_error_code lttng_register_trigger_with_name( | |
3072 | struct lttng_trigger *trigger, const char *name) | |
3073 | { | |
3074 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3075 | ||
3076 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3077 | } | |
3078 | ||
3079 | enum lttng_error_code lttng_register_trigger_with_automatic_name( | |
3080 | struct lttng_trigger *trigger) | |
3081 | { | |
3082 | const int ret = _lttng_register_trigger(trigger, false, true); | |
3083 | ||
3084 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3085 | } | |
3086 | ||
b99a0cb3 JG |
3087 | enum lttng_error_code lttng_error_query_execute( |
3088 | const struct lttng_error_query *query, | |
3089 | const struct lttng_endpoint *endpoint, | |
3090 | struct lttng_error_query_results **results) | |
3091 | { | |
3092 | int ret; | |
3093 | enum lttng_error_code ret_code; | |
3094 | struct lttcomm_session_msg lsm = { | |
3095 | .cmd_type = LTTNG_EXECUTE_ERROR_QUERY, | |
3096 | }; | |
3097 | struct lttng_payload message; | |
3098 | struct lttng_payload reply; | |
3099 | struct lttcomm_session_msg *message_lsm; | |
3100 | ||
3101 | lttng_payload_init(&message); | |
3102 | lttng_payload_init(&reply); | |
3103 | ||
3104 | if (!query || !results) { | |
3105 | ret_code = LTTNG_ERR_INVALID; | |
3106 | goto end; | |
3107 | } | |
3108 | ||
3109 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3110 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3111 | goto end; | |
3112 | } | |
3113 | ||
3114 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3115 | if (ret) { | |
3116 | ret_code = LTTNG_ERR_NOMEM; | |
3117 | goto end; | |
3118 | } | |
3119 | ||
3120 | ret = lttng_error_query_serialize(query, &message); | |
3121 | if (ret) { | |
3122 | ret_code = LTTNG_ERR_UNK; | |
3123 | goto end; | |
3124 | } | |
3125 | ||
3126 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3127 | message_lsm->u.error_query.length = | |
3128 | (uint32_t) message.buffer.size - sizeof(lsm); | |
3129 | ||
3130 | { | |
3131 | struct lttng_payload_view message_view = | |
3132 | lttng_payload_view_from_payload( | |
3133 | &message, 0, -1); | |
3134 | ||
3135 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3136 | &message_view); | |
3137 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3138 | if (ret < 0) { | |
3139 | ret_code = -ret; | |
3140 | goto end; | |
3141 | } | |
3142 | } | |
3143 | ||
3144 | { | |
3145 | ssize_t reply_create_ret; | |
3146 | struct lttng_payload_view reply_view = | |
3147 | lttng_payload_view_from_payload( | |
3148 | &reply, 0, reply.buffer.size); | |
3149 | ||
3150 | reply_create_ret = lttng_error_query_results_create_from_payload( | |
3151 | &reply_view, results); | |
3152 | if (reply_create_ret < 0) { | |
3153 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3154 | goto end; | |
3155 | } | |
3156 | } | |
3157 | ||
3158 | ret_code = LTTNG_OK; | |
3159 | end: | |
3160 | lttng_payload_reset(&message); | |
3161 | lttng_payload_reset(&reply); | |
3162 | return ret_code; | |
3163 | } | |
3164 | ||
b61776fb | 3165 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3166 | { |
3167 | int ret; | |
3168 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3169 | struct lttcomm_session_msg *message_lsm; |
3170 | struct lttng_payload message; | |
3171 | struct lttng_payload reply; | |
b61776fb | 3172 | struct lttng_trigger *copy = NULL; |
64eafdf6 JR |
3173 | const struct lttng_credentials user_creds = { |
3174 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3175 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3176 | }; | |
99608320 JR |
3177 | |
3178 | lttng_payload_init(&message); | |
3179 | lttng_payload_init(&reply); | |
a58c490f JG |
3180 | |
3181 | if (!trigger) { | |
3182 | ret = -LTTNG_ERR_INVALID; | |
3183 | goto end; | |
3184 | } | |
3185 | ||
b61776fb SM |
3186 | copy = lttng_trigger_copy(trigger); |
3187 | if (!copy) { | |
3188 | ret = -LTTNG_ERR_UNK; | |
3189 | goto end; | |
3190 | } | |
3191 | ||
3192 | if (!copy->creds.uid.is_set) { | |
3193 | /* Use the client credentials as the trigger credentials */ | |
3194 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3195 | } else { |
3196 | /* | |
3197 | * Validate that either the current trigger credentials and the | |
3198 | * client credentials are identical or that the current user is | |
3199 | * root. The root user can register, unregister triggers for | |
3200 | * himself and other users. | |
3201 | * | |
3202 | * This check is also present on the sessiond side, using the | |
3203 | * credentials passed on the socket. These check are all | |
3204 | * "safety" checks. | |
3205 | */ | |
3206 | const struct lttng_credentials *trigger_creds = | |
b61776fb | 3207 | lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3208 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3209 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3210 | ret = -LTTNG_ERR_EPERM; | |
3211 | goto end; | |
3212 | } | |
3213 | } | |
3214 | } | |
3215 | ||
b61776fb | 3216 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3217 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3218 | goto end; |
3219 | } | |
3220 | ||
99608320 JR |
3221 | memset(&lsm, 0, sizeof(lsm)); |
3222 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3223 | ||
97285430 JG |
3224 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3225 | if (ret) { | |
3226 | ret = -LTTNG_ERR_NOMEM; | |
3227 | goto end; | |
3228 | } | |
99608320 | 3229 | |
b61776fb | 3230 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3231 | if (ret < 0) { |
a58c490f JG |
3232 | ret = -LTTNG_ERR_UNK; |
3233 | goto end; | |
3234 | } | |
3235 | ||
b0a79813 FD |
3236 | /* |
3237 | * This is needed to populate the trigger object size for the command | |
3238 | * header and number of fds sent. | |
3239 | */ | |
3240 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3241 | ||
99608320 JR |
3242 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3243 | ||
3244 | { | |
3245 | struct lttng_payload_view message_view = | |
3246 | lttng_payload_view_from_payload( | |
3247 | &message, 0, -1); | |
3248 | ||
3249 | /* | |
3250 | * Update the message header with the number of fd that will be | |
3251 | * sent. | |
3252 | */ | |
3253 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3254 | &message_view); | |
3255 | ||
3256 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3257 | if (ret < 0) { | |
3258 | goto end; | |
3259 | } | |
3260 | } | |
3261 | ||
3262 | ret = 0; | |
a58c490f | 3263 | end: |
b61776fb | 3264 | lttng_trigger_destroy(copy); |
99608320 JR |
3265 | lttng_payload_reset(&message); |
3266 | lttng_payload_reset(&reply); | |
a58c490f JG |
3267 | return ret; |
3268 | } | |
3269 | ||
fbc9f37d JR |
3270 | /* |
3271 | * Ask the session daemon for all registered triggers for the current user. | |
3272 | * | |
3273 | * Allocates and return an lttng_triggers set. | |
3274 | * On error, returns a suitable lttng_error_code. | |
3275 | */ | |
3276 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3277 | { | |
3278 | int ret; | |
3279 | enum lttng_error_code ret_code = LTTNG_OK; | |
3280 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS }; | |
3281 | struct lttng_triggers *local_triggers = NULL; | |
3282 | struct lttng_payload reply; | |
3283 | struct lttng_payload_view lsm_view = | |
3284 | lttng_payload_view_init_from_buffer( | |
3285 | (const char *) &lsm, 0, sizeof(lsm)); | |
3286 | ||
3287 | lttng_payload_init(&reply); | |
3288 | ||
3289 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3290 | if (ret < 0) { | |
3291 | ret_code = (enum lttng_error_code) -ret; | |
3292 | goto end; | |
3293 | } | |
3294 | ||
3295 | { | |
3296 | struct lttng_payload_view reply_view = | |
3297 | lttng_payload_view_from_payload( | |
3298 | &reply, 0, reply.buffer.size); | |
3299 | ||
3300 | ret = lttng_triggers_create_from_payload( | |
3301 | &reply_view, &local_triggers); | |
3302 | if (ret < 0) { | |
3303 | ret_code = LTTNG_ERR_FATAL; | |
3304 | goto end; | |
3305 | } | |
3306 | } | |
3307 | ||
3308 | *triggers = local_triggers; | |
3309 | local_triggers = NULL; | |
3310 | end: | |
3311 | lttng_payload_reset(&reply); | |
3312 | lttng_triggers_destroy(local_triggers); | |
3313 | return ret_code; | |
3314 | } | |
3315 | ||
fac6795d | 3316 | /* |
9ae110e2 | 3317 | * lib constructor. |
fac6795d | 3318 | */ |
b2b89e8a | 3319 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3320 | { |
3321 | /* Set default session group */ | |
bbccc3d2 | 3322 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3323 | } |
49cca668 DG |
3324 | |
3325 | /* | |
9ae110e2 | 3326 | * lib destructor. |
49cca668 | 3327 | */ |
b2b89e8a | 3328 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3329 | { |
3330 | free(tracing_group); | |
3331 | } |