Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
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> | |
18 | #include <string.h> | |
19 | #include <unistd.h> | |
20 | ||
0ae3cfc6 | 21 | #include <common/bytecode/bytecode.h> |
990570ed | 22 | #include <common/common.h> |
edf4b93e | 23 | #include <common/compat/errno.h> |
15e37663 | 24 | #include <common/compat/string.h> |
990570ed | 25 | #include <common/defaults.h> |
fe489250 | 26 | #include <common/dynamic-array.h> |
b99a0cb3 | 27 | #include <common/dynamic-buffer.h> |
9e620ea7 | 28 | #include <common/payload-view.h> |
b99a0cb3 | 29 | #include <common/payload.h> |
db758600 | 30 | #include <common/sessiond-comm/sessiond-comm.h> |
159b042f | 31 | #include <common/tracker.h> |
fe489250 | 32 | #include <common/unix.h> |
a4b92340 | 33 | #include <common/uri.h> |
feb0f3e5 | 34 | #include <common/utils.h> |
a58c490f | 35 | #include <lttng/channel-internal.h> |
159b042f JG |
36 | #include <lttng/destruction-handle.h> |
37 | #include <lttng/endpoint.h> | |
b99a0cb3 | 38 | #include <lttng/error-query-internal.h> |
de453daa | 39 | #include <lttng/event-internal.h> |
159b042f | 40 | #include <lttng/health-internal.h> |
b99a0cb3 | 41 | #include <lttng/lttng-error.h> |
159b042f | 42 | #include <lttng/lttng.h> |
b178f53e | 43 | #include <lttng/session-descriptor-internal.h> |
159b042f JG |
44 | #include <lttng/session-internal.h> |
45 | #include <lttng/trigger/trigger-internal.h> | |
46 | #include <lttng/userspace-probe-internal.h> | |
fac6795d | 47 | |
b99a0cb3 | 48 | #include "lttng-ctl-helper.h" |
e4d2f27a JR |
49 | #include <common/filter/filter-ast.h> |
50 | #include <common/filter/filter-parser.h> | |
e4d2f27a | 51 | #include <common/filter/memstream.h> |
53a80697 | 52 | |
60160d2a JG |
53 | #define COPY_DOMAIN_PACKED(dst, src) \ |
54 | do { \ | |
55 | struct lttng_domain _tmp_domain; \ | |
56 | \ | |
57 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
58 | dst = _tmp_domain; \ | |
59 | } while (0) | |
53a80697 | 60 | |
fac6795d | 61 | /* Socket to session daemon for communication */ |
3e3665b8 | 62 | static int sessiond_socket = -1; |
fac6795d DG |
63 | static char sessiond_sock_path[PATH_MAX]; |
64 | ||
fac6795d DG |
65 | /* Variables */ |
66 | static char *tracing_group; | |
67 | static int connected; | |
68 | ||
97e19046 DG |
69 | /* Global */ |
70 | ||
71 | /* | |
72 | * Those two variables are used by error.h to silent or control the verbosity of | |
73 | * error message. They are global to the library so application linking with it | |
74 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
75 | */ |
76 | int lttng_opt_quiet; | |
77 | int lttng_opt_verbose; | |
c7e35b03 | 78 | int lttng_opt_mi; |
97e19046 | 79 | |
fac6795d | 80 | /* |
cd80958d | 81 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 82 | * |
cd80958d DG |
83 | * If domain is unknown, default domain will be the kernel. |
84 | */ | |
cac3069d DG |
85 | LTTNG_HIDDEN |
86 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
87 | struct lttng_domain *src) | |
cd80958d DG |
88 | { |
89 | if (src && dst) { | |
90 | switch (src->type) { | |
00e2e675 DG |
91 | case LTTNG_DOMAIN_KERNEL: |
92 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 93 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 94 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 95 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
96 | memcpy(dst, src, sizeof(struct lttng_domain)); |
97 | break; | |
98 | default: | |
99 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 100 | break; |
cd80958d DG |
101 | } |
102 | } | |
103 | } | |
104 | ||
105 | /* | |
106 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 107 | * |
1c8d13c8 TD |
108 | * On success, returns the number of bytes sent (>=0) |
109 | * On error, returns -1 | |
fac6795d | 110 | */ |
cd80958d | 111 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
112 | { |
113 | int ret; | |
114 | ||
115 | if (!connected) { | |
2f70b271 | 116 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 117 | goto end; |
fac6795d DG |
118 | } |
119 | ||
19f912db FD |
120 | DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str(lsm->cmd_type), |
121 | lsm->cmd_type); | |
a4b92340 | 122 | |
be040666 | 123 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 124 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
125 | if (ret < 0) { |
126 | ret = -LTTNG_ERR_FATAL; | |
127 | } | |
e065084a DG |
128 | |
129 | end: | |
130 | return ret; | |
131 | } | |
132 | ||
53a80697 MD |
133 | /* |
134 | * Send var len data to the session daemon. | |
135 | * | |
136 | * On success, returns the number of bytes sent (>=0) | |
137 | * On error, returns -1 | |
138 | */ | |
c2d69327 | 139 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
140 | { |
141 | int ret; | |
142 | ||
143 | if (!connected) { | |
2f70b271 | 144 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
145 | goto end; |
146 | } | |
a4b92340 | 147 | |
53a80697 MD |
148 | if (!data || !len) { |
149 | ret = 0; | |
150 | goto end; | |
151 | } | |
152 | ||
153 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
154 | if (ret < 0) { |
155 | ret = -LTTNG_ERR_FATAL; | |
156 | } | |
53a80697 MD |
157 | |
158 | end: | |
159 | return ret; | |
160 | } | |
161 | ||
a04d53fc FD |
162 | /* |
163 | * Send file descriptors to the session daemon. | |
164 | * | |
165 | * On success, returns the number of bytes sent (>=0) | |
166 | * On error, returns -1 | |
167 | */ | |
168 | static int send_session_fds(const int *fds, size_t nb_fd) | |
169 | { | |
170 | int ret; | |
171 | ||
172 | if (!connected) { | |
173 | ret = -LTTNG_ERR_NO_SESSIOND; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | if (!fds || !nb_fd) { | |
178 | ret = 0; | |
179 | goto end; | |
180 | } | |
181 | ||
182 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
183 | if (ret < 0) { | |
184 | ret = -LTTNG_ERR_FATAL; | |
185 | } | |
186 | ||
187 | end: | |
188 | return ret; | |
189 | } | |
190 | ||
e065084a | 191 | /* |
cd80958d | 192 | * Receive data from the sessiond socket. |
e065084a | 193 | * |
1c8d13c8 | 194 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 195 | * On error, returns a negative lttng_error_code. |
e065084a | 196 | */ |
ca95a216 | 197 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
198 | { |
199 | int ret; | |
200 | ||
bacc41cc FD |
201 | assert(len > 0); |
202 | ||
e065084a | 203 | if (!connected) { |
2f70b271 | 204 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 205 | goto end; |
fac6795d DG |
206 | } |
207 | ||
ca95a216 | 208 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
209 | if (ret < 0) { |
210 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
211 | } else if (ret == 0) { |
212 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 213 | } |
fac6795d | 214 | |
e065084a | 215 | end: |
fac6795d DG |
216 | return ret; |
217 | } | |
218 | ||
e368fb43 JG |
219 | /* |
220 | * Receive a payload from the session daemon by appending to an existing | |
221 | * payload. | |
222 | * On success, returns the number of bytes received (>=0) | |
223 | * On error, returns a negative lttng_error_code. | |
224 | */ | |
225 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
226 | { | |
227 | int ret; | |
228 | const size_t original_payload_size = payload->buffer.size; | |
229 | ||
230 | ret = lttng_dynamic_buffer_set_size( | |
231 | &payload->buffer, payload->buffer.size + len); | |
232 | if (ret) { | |
233 | ret = -LTTNG_ERR_NOMEM; | |
234 | goto end; | |
235 | } | |
236 | ||
237 | ret = recv_data_sessiond( | |
238 | payload->buffer.data + original_payload_size, len); | |
239 | end: | |
240 | return ret; | |
241 | } | |
242 | ||
fac6795d | 243 | /* |
9ae110e2 | 244 | * Check if we are in the specified group. |
65beb5ff | 245 | * |
9ae110e2 | 246 | * If yes return 1, else return -1. |
947308c4 | 247 | */ |
6c71277b MD |
248 | LTTNG_HIDDEN |
249 | int lttng_check_tracing_group(void) | |
947308c4 | 250 | { |
28ab59d0 | 251 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
252 | int grp_list_size, grp_id, i; |
253 | int ret = -1; | |
6c71277b | 254 | const char *grp_name = tracing_group; |
947308c4 DG |
255 | |
256 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 257 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 258 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
259 | goto end; |
260 | } | |
261 | ||
262 | /* Get number of supplementary group IDs */ | |
263 | grp_list_size = getgroups(0, NULL); | |
264 | if (grp_list_size < 0) { | |
6f04ed72 | 265 | PERROR("getgroups"); |
947308c4 DG |
266 | goto end; |
267 | } | |
268 | ||
269 | /* Alloc group list of the right size */ | |
3f451dc0 | 270 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 271 | if (!grp_list) { |
6f04ed72 | 272 | PERROR("malloc"); |
00795392 MD |
273 | goto end; |
274 | } | |
947308c4 | 275 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 276 | if (grp_id < 0) { |
6f04ed72 | 277 | PERROR("getgroups"); |
947308c4 DG |
278 | goto free_list; |
279 | } | |
280 | ||
281 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 282 | if (grp_list[i] == tracing_gid) { |
2269e89e | 283 | ret = 1; |
947308c4 DG |
284 | break; |
285 | } | |
286 | } | |
287 | ||
288 | free_list: | |
289 | free(grp_list); | |
290 | ||
291 | end: | |
292 | return ret; | |
293 | } | |
294 | ||
09b72f7a FD |
295 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
296 | { | |
297 | int ret; | |
298 | long num_cpu; | |
299 | size_t best_mem_info; | |
300 | size_t num_bytes_requested_total; | |
301 | ||
302 | /* | |
303 | * Get the number of CPU currently online to compute the amount of | |
304 | * memory needed to create a buffer for every CPU. | |
305 | */ | |
306 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
307 | if (num_cpu == -1) { | |
308 | goto error; | |
309 | } | |
310 | ||
311 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
312 | ||
313 | /* | |
314 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
315 | * reliable estimate we can get but it is only exposed by the kernel | |
316 | * since 3.14. (See Linux kernel commit: | |
317 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
318 | */ | |
319 | ret = utils_get_memory_available(&best_mem_info); | |
320 | if (ret >= 0) { | |
321 | goto success; | |
322 | } | |
323 | ||
324 | /* | |
325 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
326 | * is a sanity check for obvious user error. | |
327 | */ | |
328 | ret = utils_get_memory_total(&best_mem_info); | |
329 | if (ret >= 0) { | |
330 | goto success; | |
331 | } | |
332 | ||
333 | error: | |
334 | return -1; | |
335 | success: | |
336 | return best_mem_info >= num_bytes_requested_total; | |
337 | } | |
338 | ||
947308c4 | 339 | /* |
2269e89e DG |
340 | * Try connect to session daemon with sock_path. |
341 | * | |
342 | * Return 0 on success, else -1 | |
343 | */ | |
344 | static int try_connect_sessiond(const char *sock_path) | |
345 | { | |
346 | int ret; | |
347 | ||
348 | /* If socket exist, we check if the daemon listens for connect. */ | |
349 | ret = access(sock_path, F_OK); | |
350 | if (ret < 0) { | |
351 | /* Not alive */ | |
2f70b271 | 352 | goto error; |
2269e89e DG |
353 | } |
354 | ||
355 | ret = lttcomm_connect_unix_sock(sock_path); | |
356 | if (ret < 0) { | |
9ae110e2 | 357 | /* Not alive. */ |
2f70b271 | 358 | goto error; |
2269e89e DG |
359 | } |
360 | ||
361 | ret = lttcomm_close_unix_sock(ret); | |
362 | if (ret < 0) { | |
6f04ed72 | 363 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
364 | } |
365 | ||
366 | return 0; | |
2f70b271 DG |
367 | |
368 | error: | |
369 | return -1; | |
2269e89e DG |
370 | } |
371 | ||
372 | /* | |
2f70b271 DG |
373 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
374 | * variable. | |
375 | * | |
376 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
377 | * is somehow too long or ENOMEM). | |
947308c4 DG |
378 | */ |
379 | static int set_session_daemon_path(void) | |
380 | { | |
9ae110e2 | 381 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
382 | uid_t uid; |
383 | ||
384 | uid = getuid(); | |
947308c4 | 385 | |
2269e89e DG |
386 | if (uid != 0) { |
387 | /* Are we in the tracing group ? */ | |
6c71277b | 388 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
389 | } |
390 | ||
c295ec41 | 391 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 JG |
392 | const int ret = lttng_strncpy(sessiond_sock_path, |
393 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
394 | sizeof(sessiond_sock_path)); | |
395 | ||
396 | if (ret) { | |
397 | goto error; | |
398 | } | |
08a9c49f | 399 | } |
2269e89e | 400 | |
08a9c49f | 401 | if (uid != 0) { |
c617c0c6 MD |
402 | int ret; |
403 | ||
08a9c49f | 404 | if (in_tgroup) { |
9ae110e2 | 405 | /* Tracing group. */ |
08a9c49f TD |
406 | ret = try_connect_sessiond(sessiond_sock_path); |
407 | if (ret >= 0) { | |
408 | goto end; | |
2269e89e | 409 | } |
08a9c49f | 410 | /* Global session daemon not available... */ |
2269e89e | 411 | } |
08a9c49f TD |
412 | /* ...or not in tracing group (and not root), default */ |
413 | ||
414 | /* | |
9ae110e2 JG |
415 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
416 | * is too small; | |
417 | * With GNU C >= 2.1, snprintf returns the required size | |
418 | * (excluding closing null) | |
08a9c49f TD |
419 | */ |
420 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 421 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 422 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 423 | goto error; |
947308c4 | 424 | } |
947308c4 | 425 | } |
08a9c49f | 426 | end: |
947308c4 | 427 | return 0; |
2f70b271 DG |
428 | |
429 | error: | |
430 | return -1; | |
947308c4 DG |
431 | } |
432 | ||
65beb5ff | 433 | /* |
9ae110e2 | 434 | * Connect to the LTTng session daemon. |
65beb5ff | 435 | * |
3e3665b8 | 436 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 437 | */ |
3e3665b8 | 438 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
439 | { |
440 | int ret; | |
441 | ||
442 | ret = set_session_daemon_path(); | |
443 | if (ret < 0) { | |
2f70b271 | 444 | goto error; |
65beb5ff DG |
445 | } |
446 | ||
9ae110e2 | 447 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
448 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
449 | if (ret < 0) { | |
2f70b271 | 450 | goto error; |
65beb5ff DG |
451 | } |
452 | ||
3e3665b8 | 453 | return ret; |
2f70b271 DG |
454 | |
455 | error: | |
456 | return -1; | |
65beb5ff DG |
457 | } |
458 | ||
3e3665b8 JG |
459 | static void reset_global_sessiond_connection_state(void) |
460 | { | |
461 | sessiond_socket = -1; | |
462 | connected = 0; | |
463 | } | |
464 | ||
65beb5ff | 465 | /* |
1c8d13c8 | 466 | * Clean disconnect from the session daemon. |
9ae110e2 | 467 | * |
1c8d13c8 | 468 | * On success, return 0. On error, return -1. |
65beb5ff DG |
469 | */ |
470 | static int disconnect_sessiond(void) | |
471 | { | |
472 | int ret = 0; | |
473 | ||
474 | if (connected) { | |
475 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 476 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
477 | } |
478 | ||
479 | return ret; | |
480 | } | |
481 | ||
795a978d PP |
482 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
483 | size_t *user_len) | |
484 | { | |
485 | int ret = 0; | |
486 | void *buf = NULL; | |
487 | ||
488 | if (len) { | |
489 | if (!user_len) { | |
490 | ret = -LTTNG_ERR_INVALID; | |
491 | goto end; | |
492 | } | |
493 | ||
494 | buf = zmalloc(len); | |
495 | if (!buf) { | |
496 | ret = -ENOMEM; | |
497 | goto end; | |
498 | } | |
499 | ||
500 | ret = recv_data_sessiond(buf, len); | |
501 | if (ret < 0) { | |
502 | goto end; | |
503 | } | |
504 | ||
505 | if (!user_buf) { | |
506 | ret = -LTTNG_ERR_INVALID; | |
507 | goto end; | |
508 | } | |
509 | ||
510 | /* Move ownership of command header buffer to user. */ | |
511 | *user_buf = buf; | |
512 | buf = NULL; | |
513 | *user_len = len; | |
514 | } else { | |
515 | /* No command header. */ | |
516 | if (user_len) { | |
517 | *user_len = 0; | |
518 | } | |
519 | ||
520 | if (user_buf) { | |
521 | *user_buf = NULL; | |
522 | } | |
523 | } | |
524 | ||
525 | end: | |
526 | free(buf); | |
527 | return ret; | |
528 | } | |
529 | ||
35a6fdb7 | 530 | /* |
cd80958d | 531 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
532 | * Takes extra var. len. data and file descriptors as input to send to the |
533 | * session daemon. | |
65beb5ff | 534 | * |
af87c45a | 535 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 536 | */ |
cac3069d | 537 | LTTNG_HIDDEN |
a04d53fc FD |
538 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
539 | const int *fds, size_t nb_fd, const void *vardata, | |
540 | size_t vardata_len, void **user_payload_buf, | |
541 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
542 | { |
543 | int ret; | |
795a978d | 544 | size_t payload_len; |
cd80958d | 545 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
546 | |
547 | ret = connect_sessiond(); | |
548 | if (ret < 0) { | |
2f70b271 | 549 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 550 | goto end; |
3e3665b8 JG |
551 | } else { |
552 | sessiond_socket = ret; | |
553 | connected = 1; | |
65beb5ff DG |
554 | } |
555 | ||
cd80958d | 556 | ret = send_session_msg(lsm); |
65beb5ff | 557 | if (ret < 0) { |
2f70b271 | 558 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
559 | goto end; |
560 | } | |
53a80697 | 561 | /* Send var len data */ |
795a978d | 562 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 563 | if (ret < 0) { |
2f70b271 | 564 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
565 | goto end; |
566 | } | |
65beb5ff | 567 | |
a04d53fc FD |
568 | /* Send fds */ |
569 | ret = send_session_fds(fds, nb_fd); | |
570 | if (ret < 0) { | |
571 | /* Ret value is a valid lttng error code. */ | |
572 | goto end; | |
573 | } | |
574 | ||
65beb5ff DG |
575 | /* Get header from data transmission */ |
576 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
577 | if (ret < 0) { | |
2f70b271 | 578 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
579 | goto end; |
580 | } | |
581 | ||
582 | /* Check error code if OK */ | |
f73fabfd | 583 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
584 | ret = -llm.ret_code; |
585 | goto end; | |
586 | } | |
587 | ||
795a978d PP |
588 | /* Get command header from data transmission */ |
589 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
590 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 591 | if (ret < 0) { |
65beb5ff DG |
592 | goto end; |
593 | } | |
594 | ||
795a978d PP |
595 | /* Get payload from data transmission */ |
596 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
597 | &payload_len); | |
598 | if (ret < 0) { | |
83009e5e DG |
599 | goto end; |
600 | } | |
601 | ||
795a978d | 602 | ret = llm.data_size; |
65beb5ff DG |
603 | |
604 | end: | |
605 | disconnect_sessiond(); | |
606 | return ret; | |
607 | } | |
608 | ||
e368fb43 JG |
609 | LTTNG_HIDDEN |
610 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, | |
611 | struct lttng_payload *reply) | |
612 | { | |
613 | int ret; | |
614 | struct lttcomm_lttng_msg llm; | |
fe489250 | 615 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 JG |
616 | |
617 | assert(reply->buffer.size == 0); | |
fe489250 | 618 | assert(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); |
e368fb43 JG |
619 | |
620 | ret = connect_sessiond(); | |
621 | if (ret < 0) { | |
622 | ret = -LTTNG_ERR_NO_SESSIOND; | |
623 | goto end; | |
624 | } else { | |
625 | sessiond_socket = ret; | |
626 | connected = 1; | |
627 | } | |
628 | ||
629 | /* Send command to session daemon */ | |
630 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data, | |
631 | message->buffer.size); | |
632 | if (ret < 0) { | |
633 | ret = -LTTNG_ERR_FATAL; | |
634 | goto end; | |
635 | } | |
636 | ||
fe489250 JG |
637 | if (fd_count > 0) { |
638 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, | |
639 | message); | |
640 | if (ret < 0) { | |
641 | ret = -LTTNG_ERR_FATAL; | |
642 | goto end; | |
643 | } | |
e368fb43 JG |
644 | } |
645 | ||
646 | /* Get header from data transmission */ | |
647 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
648 | if (ret < 0) { | |
649 | /* Ret value is a valid lttng error code. */ | |
650 | goto end; | |
651 | } | |
652 | ||
653 | llm = *((typeof(llm) *) reply->buffer.data); | |
654 | ||
655 | /* Check error code if OK */ | |
656 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
657 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
658 | /* Invalid error code received. */ | |
659 | ret = -LTTNG_ERR_UNK; | |
660 | } else { | |
661 | ret = -llm.ret_code; | |
662 | } | |
e368fb43 JG |
663 | goto end; |
664 | } | |
665 | ||
666 | if (llm.cmd_header_size > 0) { | |
667 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
668 | if (ret < 0) { | |
669 | goto end; | |
670 | } | |
671 | } | |
672 | ||
673 | /* Get command header from data transmission */ | |
674 | if (llm.data_size > 0) { | |
675 | ret = recv_payload_sessiond(reply, llm.data_size); | |
676 | if (ret < 0) { | |
677 | goto end; | |
678 | } | |
679 | } | |
680 | ||
681 | if (llm.fd_count > 0) { | |
fe489250 JG |
682 | ret = lttcomm_recv_payload_fds_unix_sock( |
683 | sessiond_socket, llm.fd_count, reply); | |
684 | if (ret < 0) { | |
e368fb43 JG |
685 | goto end; |
686 | } | |
687 | } | |
688 | ||
689 | /* Don't return the llm header to the caller. */ | |
690 | memmove(reply->buffer.data, reply->buffer.data + sizeof(llm), | |
691 | reply->buffer.size - sizeof(llm)); | |
692 | ret = lttng_dynamic_buffer_set_size( | |
693 | &reply->buffer, reply->buffer.size - sizeof(llm)); | |
694 | if (ret) { | |
695 | /* Can't happen as size is reduced. */ | |
696 | abort(); | |
697 | } | |
698 | ||
699 | ret = reply->buffer.size; | |
700 | ||
701 | end: | |
702 | disconnect_sessiond(); | |
703 | return ret; | |
704 | } | |
705 | ||
9f19cc17 | 706 | /* |
cd80958d | 707 | * Create lttng handle and return pointer. |
9ae110e2 | 708 | * |
1c8d13c8 | 709 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 710 | */ |
cd80958d DG |
711 | struct lttng_handle *lttng_create_handle(const char *session_name, |
712 | struct lttng_domain *domain) | |
9f19cc17 | 713 | { |
e1b624d0 | 714 | int ret; |
2f70b271 DG |
715 | struct lttng_handle *handle = NULL; |
716 | ||
3f451dc0 | 717 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 718 | if (handle == NULL) { |
2f70b271 | 719 | PERROR("malloc handle"); |
cd80958d DG |
720 | goto end; |
721 | } | |
722 | ||
723 | /* Copy session name */ | |
e1b624d0 JG |
724 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
725 | sizeof(handle->session_name)); | |
726 | if (ret) { | |
727 | goto error; | |
728 | } | |
cd80958d | 729 | |
95681498 JG |
730 | /* Copy lttng domain or leave initialized to 0. */ |
731 | if (domain) { | |
732 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
733 | } | |
cd80958d DG |
734 | |
735 | end: | |
736 | return handle; | |
e1b624d0 JG |
737 | error: |
738 | free(handle); | |
739 | return NULL; | |
cd80958d DG |
740 | } |
741 | ||
742 | /* | |
743 | * Destroy handle by free(3) the pointer. | |
744 | */ | |
745 | void lttng_destroy_handle(struct lttng_handle *handle) | |
746 | { | |
0e428499 | 747 | free(handle); |
eb354453 DG |
748 | } |
749 | ||
d9800920 DG |
750 | /* |
751 | * Register an outside consumer. | |
9ae110e2 | 752 | * |
1c8d13c8 | 753 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
754 | */ |
755 | int lttng_register_consumer(struct lttng_handle *handle, | |
756 | const char *socket_path) | |
757 | { | |
e1b624d0 | 758 | int ret; |
d9800920 DG |
759 | struct lttcomm_session_msg lsm; |
760 | ||
2f70b271 | 761 | if (handle == NULL || socket_path == NULL) { |
e1b624d0 JG |
762 | ret = -LTTNG_ERR_INVALID; |
763 | goto end; | |
2f70b271 DG |
764 | } |
765 | ||
53efb85a | 766 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 767 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
e1b624d0 | 768 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 769 | sizeof(lsm.session.name)); |
e1b624d0 JG |
770 | if (ret) { |
771 | ret = -LTTNG_ERR_INVALID; | |
772 | goto end; | |
773 | } | |
774 | ||
60160d2a | 775 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 776 | |
e1b624d0 JG |
777 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
778 | sizeof(lsm.u.reg.path)); | |
779 | if (ret) { | |
780 | ret = -LTTNG_ERR_INVALID; | |
781 | goto end; | |
782 | } | |
d9800920 | 783 | |
e1b624d0 JG |
784 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
785 | end: | |
786 | return ret; | |
d9800920 DG |
787 | } |
788 | ||
1df4dedd | 789 | /* |
9ae110e2 JG |
790 | * Start tracing for all traces of the session. |
791 | * | |
792 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 793 | */ |
6a4f824d | 794 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 795 | { |
e1b624d0 | 796 | int ret; |
cd80958d DG |
797 | struct lttcomm_session_msg lsm; |
798 | ||
6a4f824d | 799 | if (session_name == NULL) { |
e1b624d0 JG |
800 | ret = -LTTNG_ERR_INVALID; |
801 | goto end; | |
cd80958d DG |
802 | } |
803 | ||
53efb85a | 804 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 805 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 806 | |
e1b624d0 JG |
807 | ret = lttng_strncpy(lsm.session.name, session_name, |
808 | sizeof(lsm.session.name)); | |
809 | if (ret) { | |
810 | ret = -LTTNG_ERR_INVALID; | |
811 | goto end; | |
812 | } | |
cd80958d | 813 | |
e1b624d0 JG |
814 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
815 | end: | |
816 | return ret; | |
f3ed775e | 817 | } |
1df4dedd DG |
818 | |
819 | /* | |
38ee087f | 820 | * Stop tracing for all traces of the session. |
f3ed775e | 821 | */ |
38ee087f | 822 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 823 | { |
38ee087f | 824 | int ret, data_ret; |
cd80958d DG |
825 | struct lttcomm_session_msg lsm; |
826 | ||
6a4f824d | 827 | if (session_name == NULL) { |
e1b624d0 JG |
828 | ret = -LTTNG_ERR_INVALID; |
829 | goto error; | |
6a4f824d DG |
830 | } |
831 | ||
53efb85a | 832 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 833 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 834 | |
e1b624d0 JG |
835 | ret = lttng_strncpy(lsm.session.name, session_name, |
836 | sizeof(lsm.session.name)); | |
837 | if (ret) { | |
838 | ret = -LTTNG_ERR_INVALID; | |
839 | goto error; | |
840 | } | |
cd80958d | 841 | |
cac3069d | 842 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
843 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
844 | goto error; | |
845 | } | |
846 | ||
847 | if (!wait) { | |
848 | goto end; | |
849 | } | |
850 | ||
38ee087f DG |
851 | /* Check for data availability */ |
852 | do { | |
6d805429 | 853 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
854 | if (data_ret < 0) { |
855 | /* Return the data available call error. */ | |
856 | ret = data_ret; | |
857 | goto error; | |
858 | } | |
859 | ||
860 | /* | |
9ae110e2 JG |
861 | * Data sleep time before retrying (in usec). Don't sleep if the |
862 | * call returned value indicates availability. | |
38ee087f | 863 | */ |
6d805429 | 864 | if (data_ret) { |
c8f61fd4 | 865 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 866 | } |
6d805429 | 867 | } while (data_ret != 0); |
38ee087f | 868 | |
38ee087f DG |
869 | end: |
870 | error: | |
871 | return ret; | |
872 | } | |
873 | ||
874 | /* | |
875 | * Stop tracing and wait for data availability. | |
876 | */ | |
877 | int lttng_stop_tracing(const char *session_name) | |
878 | { | |
879 | return _lttng_stop_tracing(session_name, 1); | |
880 | } | |
881 | ||
882 | /* | |
883 | * Stop tracing but _don't_ wait for data availability. | |
884 | */ | |
885 | int lttng_stop_tracing_no_wait(const char *session_name) | |
886 | { | |
887 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
888 | } |
889 | ||
890 | /* | |
601d5acf DG |
891 | * Add context to a channel. |
892 | * | |
893 | * If the given channel is NULL, add the contexts to all channels. | |
894 | * The event_name param is ignored. | |
af87c45a DG |
895 | * |
896 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 897 | */ |
cd80958d | 898 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
899 | struct lttng_event_context *ctx, const char *event_name, |
900 | const char *channel_name) | |
d65106b1 | 901 | { |
2001793c JG |
902 | int ret; |
903 | size_t len = 0; | |
904 | char *buf = NULL; | |
cd80958d DG |
905 | struct lttcomm_session_msg lsm; |
906 | ||
9ae110e2 | 907 | /* Safety check. Both are mandatory. */ |
9d697d3d | 908 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
909 | ret = -LTTNG_ERR_INVALID; |
910 | goto end; | |
cd80958d DG |
911 | } |
912 | ||
441c16a7 | 913 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
914 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
915 | ||
85076754 | 916 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
917 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
918 | sizeof(lsm.u.context.channel_name)); | |
919 | if (ret) { | |
920 | ret = -LTTNG_ERR_INVALID; | |
921 | goto end; | |
85076754 | 922 | } |
cd80958d | 923 | |
60160d2a | 924 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
e1b624d0 | 925 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 926 | sizeof(lsm.session.name)); |
e1b624d0 JG |
927 | if (ret) { |
928 | ret = -LTTNG_ERR_INVALID; | |
929 | goto end; | |
930 | } | |
cd80958d | 931 | |
2001793c JG |
932 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
933 | size_t provider_len, ctx_len; | |
934 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
935 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
936 | ||
937 | if (!provider_name || !ctx_name) { | |
938 | ret = -LTTNG_ERR_INVALID; | |
939 | goto end; | |
940 | } | |
941 | ||
942 | provider_len = strlen(provider_name); | |
943 | if (provider_len == 0) { | |
944 | ret = -LTTNG_ERR_INVALID; | |
945 | goto end; | |
946 | } | |
947 | lsm.u.context.provider_name_len = provider_len; | |
948 | ||
949 | ctx_len = strlen(ctx_name); | |
950 | if (ctx_len == 0) { | |
951 | ret = -LTTNG_ERR_INVALID; | |
952 | goto end; | |
953 | } | |
954 | lsm.u.context.context_name_len = ctx_len; | |
955 | ||
956 | len = provider_len + ctx_len; | |
957 | buf = zmalloc(len); | |
958 | if (!buf) { | |
959 | ret = -LTTNG_ERR_NOMEM; | |
960 | goto end; | |
961 | } | |
962 | ||
963 | memcpy(buf, provider_name, provider_len); | |
964 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
965 | } | |
966 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
967 | |
968 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
969 | /* | |
970 | * Don't leak application addresses to the sessiond. | |
971 | * This is only necessary when ctx is for an app ctx otherwise | |
972 | * the values inside the union (type & config) are overwritten. | |
973 | */ | |
974 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
975 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
976 | } | |
2001793c | 977 | |
795a978d | 978 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
979 | end: |
980 | free(buf); | |
981 | return ret; | |
d65106b1 DG |
982 | } |
983 | ||
f3ed775e | 984 | /* |
9ae110e2 JG |
985 | * Enable event(s) for a channel. |
986 | * | |
987 | * If no event name is specified, all events are enabled. | |
988 | * If no channel name is specified, the default 'channel0' is used. | |
989 | * | |
990 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 991 | */ |
cd80958d | 992 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 993 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 994 | { |
f8a96544 JI |
995 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
996 | NULL, 0, NULL); | |
1df4dedd DG |
997 | } |
998 | ||
53a80697 | 999 | /* |
025faf73 | 1000 | * Create or enable an event with a filter expression. |
178191b3 | 1001 | * |
53a80697 MD |
1002 | * Return negative error value on error. |
1003 | * Return size of returned session payload data if OK. | |
1004 | */ | |
025faf73 | 1005 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 1006 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
1007 | const char *filter_expression) |
1008 | { | |
f8a96544 JI |
1009 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
1010 | filter_expression, 0, NULL); | |
53a80697 MD |
1011 | } |
1012 | ||
347c5ab5 | 1013 | /* |
0e115563 | 1014 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1015 | * NULL if not applicable. |
1016 | * | |
1017 | * An event with NO loglevel and the name is * will return NULL. | |
1018 | */ | |
0e115563 | 1019 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1020 | { |
1021 | int err; | |
0e115563 | 1022 | char *agent_filter = NULL; |
347c5ab5 DG |
1023 | |
1024 | assert(ev); | |
1025 | ||
1026 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1027 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1028 | if (filter) { |
0e115563 | 1029 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
1030 | ev->name); |
1031 | } else { | |
0e115563 | 1032 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1033 | } |
1034 | if (err < 0) { | |
1035 | PERROR("asprintf"); | |
6a556f7b | 1036 | goto error; |
347c5ab5 DG |
1037 | } |
1038 | } | |
1039 | ||
1040 | /* Add loglevel filtering if any for the JUL domain. */ | |
1041 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1042 | const char *op; |
347c5ab5 DG |
1043 | |
1044 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1045 | op = ">="; | |
1046 | } else { | |
1047 | op = "=="; | |
1048 | } | |
1049 | ||
0e115563 | 1050 | if (filter || agent_filter) { |
6a556f7b JG |
1051 | char *new_filter; |
1052 | ||
fb0edb23 | 1053 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 1054 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 1055 | ev->loglevel); |
0e115563 DG |
1056 | if (agent_filter) { |
1057 | free(agent_filter); | |
6a556f7b | 1058 | } |
0e115563 | 1059 | agent_filter = new_filter; |
347c5ab5 | 1060 | } else { |
0e115563 | 1061 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
1062 | ev->loglevel); |
1063 | } | |
1064 | if (err < 0) { | |
1065 | PERROR("asprintf"); | |
6a556f7b | 1066 | goto error; |
347c5ab5 DG |
1067 | } |
1068 | } | |
1069 | ||
0e115563 | 1070 | return agent_filter; |
6a556f7b | 1071 | error: |
0e115563 | 1072 | free(agent_filter); |
6a556f7b | 1073 | return NULL; |
347c5ab5 DG |
1074 | } |
1075 | ||
93deb080 JI |
1076 | /* |
1077 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1078 | * If no event name is specified, all events are enabled. | |
1079 | * If no channel name is specified, the default name is used. | |
1080 | * If filter expression is not NULL, the filter is set for the event. | |
1081 | * If exclusion count is not zero, the exclusions are set for the event. | |
1082 | * Returns size of returned session payload data or a negative error code. | |
1083 | */ | |
1084 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1085 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1086 | const char *original_filter_expression, |
93deb080 JI |
1087 | int exclusion_count, char **exclusion_list) |
1088 | { | |
1089 | struct lttcomm_session_msg lsm; | |
e368fb43 JG |
1090 | struct lttng_payload payload; |
1091 | int ret = 0, i; | |
137b9942 | 1092 | unsigned int free_filter_expression = 0; |
93deb080 | 1093 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1094 | |
6a0838b7 YL |
1095 | /* |
1096 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1097 | * a variable-length payload from where to send the data. |
6a0838b7 | 1098 | */ |
e368fb43 | 1099 | lttng_payload_init(&payload); |
ec005ec6 | 1100 | |
e9efbcd3 JG |
1101 | /* |
1102 | * Cast as non-const since we may replace the filter expression | |
1103 | * by a dynamically allocated string. Otherwise, the original | |
1104 | * string is not modified. | |
1105 | */ | |
1106 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1107 | |
1108 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1109 | ret = -LTTNG_ERR_INVALID; |
1110 | goto error; | |
93deb080 JI |
1111 | } |
1112 | ||
9ae110e2 JG |
1113 | /* |
1114 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1115 | * anyway, so treat this corner-case early to eliminate |
1116 | * lttng_fmemopen error for 0-byte allocation. | |
1117 | */ | |
1118 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1119 | ret = -LTTNG_ERR_INVALID; |
1120 | goto error; | |
93deb080 JI |
1121 | } |
1122 | ||
1123 | memset(&lsm, 0, sizeof(lsm)); | |
1124 | ||
1125 | /* If no channel name, send empty string. */ | |
e1b624d0 JG |
1126 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", |
1127 | sizeof(lsm.u.enable.channel_name)); | |
1128 | if (ret) { | |
1129 | ret = -LTTNG_ERR_INVALID; | |
1130 | goto error; | |
93deb080 JI |
1131 | } |
1132 | ||
18a720cd MD |
1133 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1134 | if (ev->name[0] == '\0') { | |
e1b624d0 JG |
1135 | /* Enable all events. */ |
1136 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
1137 | assert(ret == 0); | |
6565421f | 1138 | } |
93deb080 | 1139 | |
60160d2a | 1140 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1141 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1142 | ||
e1b624d0 | 1143 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
93deb080 | 1144 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1145 | if (ret) { |
1146 | ret = -LTTNG_ERR_INVALID; | |
1147 | goto error; | |
1148 | } | |
1149 | ||
93deb080 JI |
1150 | lsm.u.enable.exclusion_count = exclusion_count; |
1151 | lsm.u.enable.bytecode_len = 0; | |
1152 | ||
9ae110e2 | 1153 | /* Parse filter expression. */ |
5cdb6027 | 1154 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1155 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1156 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1157 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1158 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1159 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1160 | char *agent_filter; | |
64226865 | 1161 | |
347c5ab5 | 1162 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1163 | agent_filter = set_agent_filter(filter_expression, ev); |
1164 | if (!agent_filter) { | |
137b9942 | 1165 | if (!filter_expression) { |
9ae110e2 JG |
1166 | /* |
1167 | * No JUL and no filter, just skip | |
1168 | * everything below. | |
1169 | */ | |
137b9942 DG |
1170 | goto ask_sessiond; |
1171 | } | |
64226865 DG |
1172 | } else { |
1173 | /* | |
9ae110e2 JG |
1174 | * With an agent filter, the original filter has |
1175 | * been added to it thus replace the filter | |
1176 | * expression. | |
64226865 | 1177 | */ |
0e115563 | 1178 | filter_expression = agent_filter; |
e9efbcd3 | 1179 | free_filter_expression = 1; |
9b21e6d5 | 1180 | } |
9b21e6d5 | 1181 | } |
93deb080 | 1182 | |
e4d2f27a | 1183 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1184 | if (ret) { |
137b9942 | 1185 | goto filter_error; |
93deb080 | 1186 | } |
e4d2f27a JR |
1187 | |
1188 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1189 | + bytecode_get_len(&ctx->bytecode->b); | |
1190 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6b453b5e JG |
1191 | } |
1192 | ||
e368fb43 JG |
1193 | ret = lttng_dynamic_buffer_set_capacity(&payload.buffer, |
1194 | lsm.u.enable.bytecode_len + | |
1195 | lsm.u.enable.expression_len + | |
1196 | LTTNG_SYMBOL_NAME_LEN * | |
1197 | exclusion_count); | |
15e37663 | 1198 | if (ret) { |
6b453b5e | 1199 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1200 | goto mem_error; |
6b453b5e | 1201 | } |
137b9942 | 1202 | |
9ae110e2 | 1203 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1204 | for (i = 0; i < exclusion_count; i++) { |
1205 | size_t exclusion_len; | |
1206 | ||
53a5c209 | 1207 | exclusion_len = lttng_strnlen(exclusion_list[i], |
15e37663 JG |
1208 | LTTNG_SYMBOL_NAME_LEN); |
1209 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1210 | /* Exclusion is not NULL-terminated. */ | |
1211 | ret = -LTTNG_ERR_INVALID; | |
1212 | goto mem_error; | |
1213 | } | |
1214 | ||
e368fb43 | 1215 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
53a5c209 FD |
1216 | exclusion_list[i], exclusion_len); |
1217 | if (ret) { | |
1218 | goto mem_error; | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * Padding the rest of the entry with zeros. Every exclusion | |
1223 | * entries take LTTNG_SYMBOL_NAME_LEN bytes in the buffer. | |
1224 | */ | |
1225 | ret = lttng_dynamic_buffer_set_size(&payload.buffer, | |
1226 | LTTNG_SYMBOL_NAME_LEN * (i + 1)); | |
15e37663 JG |
1227 | if (ret) { |
1228 | goto mem_error; | |
1229 | } | |
6b453b5e | 1230 | } |
15e37663 | 1231 | |
9ae110e2 | 1232 | /* Add filter expression next. */ |
15e37663 | 1233 | if (filter_expression) { |
e368fb43 | 1234 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1235 | filter_expression, lsm.u.enable.expression_len); |
1236 | if (ret) { | |
1237 | goto mem_error; | |
1238 | } | |
6b453b5e | 1239 | } |
9ae110e2 | 1240 | /* Add filter bytecode next. */ |
137b9942 | 1241 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
e368fb43 | 1242 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1243 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); |
1244 | if (ret) { | |
1245 | goto mem_error; | |
1246 | } | |
1247 | } | |
1248 | if (ev->extended.ptr) { | |
1249 | struct lttng_event_extended *ev_ext = | |
1250 | (struct lttng_event_extended *) ev->extended.ptr; | |
1251 | ||
1252 | if (ev_ext->probe_location) { | |
1253 | /* | |
1254 | * lttng_userspace_probe_location_serialize returns the | |
1255 | * number of bytes that was appended to the buffer. | |
1256 | */ | |
1257 | ret = lttng_userspace_probe_location_serialize( | |
e368fb43 | 1258 | ev_ext->probe_location, &payload); |
56f0bc67 | 1259 | if (ret < 0) { |
15e37663 JG |
1260 | goto mem_error; |
1261 | } | |
1262 | ||
15e37663 JG |
1263 | /* |
1264 | * Set the size of the userspace probe location element | |
1265 | * of the buffer so that the receiving side knows where | |
1266 | * to split it. | |
1267 | */ | |
1268 | lsm.u.enable.userspace_probe_location_len = ret; | |
1269 | } | |
93deb080 JI |
1270 | } |
1271 | ||
e368fb43 JG |
1272 | { |
1273 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1274 | &payload, 0, -1); | |
fe489250 | 1275 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1276 | int fd_to_send; |
1277 | ||
1278 | if (fd_count < 0) { | |
1279 | goto mem_error; | |
1280 | } | |
1281 | ||
1282 | assert(fd_count == 0 || fd_count == 1); | |
1283 | if (fd_count == 1) { | |
e2fc8e9d | 1284 | struct fd_handle *h = |
fe489250 JG |
1285 | lttng_payload_view_pop_fd_handle(&view); |
1286 | ||
e2fc8e9d | 1287 | if (!h) { |
e368fb43 JG |
1288 | goto mem_error; |
1289 | } | |
1290 | ||
e2fc8e9d SM |
1291 | fd_to_send = fd_handle_get_fd(h); |
1292 | fd_handle_put(h); | |
e368fb43 JG |
1293 | } |
1294 | ||
1295 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1296 | fd_count ? &fd_to_send : NULL, fd_count, | |
1297 | view.buffer.size ? view.buffer.data : NULL, | |
1298 | view.buffer.size, NULL, NULL, 0); | |
1299 | } | |
93deb080 | 1300 | |
7ca1dc6f DG |
1301 | mem_error: |
1302 | if (filter_expression && ctx) { | |
93deb080 JI |
1303 | filter_bytecode_free(ctx); |
1304 | filter_ir_free(ctx); | |
1305 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1306 | } |
1307 | filter_error: | |
1308 | if (free_filter_expression) { | |
1309 | /* | |
9ae110e2 JG |
1310 | * The filter expression has been replaced and must be freed as |
1311 | * it is not the original filter expression received as a | |
1312 | * parameter. | |
7ca1dc6f DG |
1313 | */ |
1314 | free(filter_expression); | |
93deb080 | 1315 | } |
137b9942 DG |
1316 | error: |
1317 | /* | |
9ae110e2 JG |
1318 | * Return directly to the caller and don't ask the sessiond since |
1319 | * something went wrong in the parsing of data above. | |
137b9942 | 1320 | */ |
e368fb43 | 1321 | lttng_payload_reset(&payload); |
93deb080 | 1322 | return ret; |
3e1c9ff7 DG |
1323 | |
1324 | ask_sessiond: | |
1325 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1326 | return ret; | |
93deb080 JI |
1327 | } |
1328 | ||
6e911cad MD |
1329 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1330 | struct lttng_event *ev, const char *channel_name, | |
1331 | const char *original_filter_expression) | |
1df4dedd | 1332 | { |
cd80958d | 1333 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1334 | char *varlen_data; |
1335 | int ret = 0; | |
1336 | unsigned int free_filter_expression = 0; | |
1337 | struct filter_parser_ctx *ctx = NULL; | |
1338 | /* | |
1339 | * Cast as non-const since we may replace the filter expression | |
1340 | * by a dynamically allocated string. Otherwise, the original | |
1341 | * string is not modified. | |
1342 | */ | |
1343 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1344 | |
6e911cad MD |
1345 | if (handle == NULL || ev == NULL) { |
1346 | ret = -LTTNG_ERR_INVALID; | |
1347 | goto error; | |
1348 | } | |
1349 | ||
9ae110e2 JG |
1350 | /* |
1351 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1352 | * anyway, so treat this corner-case early to eliminate |
1353 | * lttng_fmemopen error for 0-byte allocation. | |
1354 | */ | |
1355 | if (filter_expression && filter_expression[0] == '\0') { | |
1356 | ret = -LTTNG_ERR_INVALID; | |
1357 | goto error; | |
cd80958d DG |
1358 | } |
1359 | ||
441c16a7 MD |
1360 | memset(&lsm, 0, sizeof(lsm)); |
1361 | ||
85076754 | 1362 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
1363 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", |
1364 | sizeof(lsm.u.disable.channel_name)); | |
1365 | if (ret) { | |
1366 | ret = -LTTNG_ERR_INVALID; | |
1367 | goto error; | |
eb354453 DG |
1368 | } |
1369 | ||
18a720cd | 1370 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1371 | |
60160d2a | 1372 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1373 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1374 | ||
e1b624d0 | 1375 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 1376 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1377 | if (ret) { |
1378 | ret = -LTTNG_ERR_INVALID; | |
1379 | goto error; | |
1380 | } | |
1381 | ||
6e911cad | 1382 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1383 | |
6e911cad MD |
1384 | /* |
1385 | * For the JUL domain, a filter is enforced except for the | |
1386 | * disable all event. This is done to avoid having the event in | |
1387 | * all sessions thus filtering by logger name. | |
1388 | */ | |
1389 | if (filter_expression == NULL && | |
1390 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1391 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1392 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1393 | goto ask_sessiond; |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * We have a filter, so we need to set up a variable-length | |
1398 | * memory block from where to send the data. | |
1399 | */ | |
1400 | ||
1401 | /* Parse filter expression */ | |
1402 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1403 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1404 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1405 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1406 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1407 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1408 | char *agent_filter; | |
6e911cad MD |
1409 | |
1410 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1411 | agent_filter = set_agent_filter(filter_expression, ev); |
1412 | if (!agent_filter) { | |
6e911cad | 1413 | if (!filter_expression) { |
9ae110e2 JG |
1414 | /* |
1415 | * No JUL and no filter, just skip | |
1416 | * everything below. | |
1417 | */ | |
6e911cad MD |
1418 | goto ask_sessiond; |
1419 | } | |
1420 | } else { | |
1421 | /* | |
9ae110e2 JG |
1422 | * With a JUL filter, the original filter has |
1423 | * been added to it thus replace the filter | |
1424 | * expression. | |
6e911cad | 1425 | */ |
0e115563 | 1426 | filter_expression = agent_filter; |
6e911cad MD |
1427 | free_filter_expression = 1; |
1428 | } | |
1429 | } | |
1430 | ||
e4d2f27a | 1431 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad MD |
1432 | if (ret) { |
1433 | goto filter_error; | |
1434 | } | |
e4d2f27a JR |
1435 | |
1436 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1437 | + bytecode_get_len(&ctx->bytecode->b); | |
1438 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6e911cad MD |
1439 | } |
1440 | ||
1441 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1442 | + lsm.u.disable.expression_len); | |
1443 | if (!varlen_data) { | |
1444 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1445 | goto mem_error; | |
1446 | } | |
1447 | ||
9ae110e2 | 1448 | /* Add filter expression. */ |
6e911cad MD |
1449 | if (lsm.u.disable.expression_len != 0) { |
1450 | memcpy(varlen_data, | |
1451 | filter_expression, | |
1452 | lsm.u.disable.expression_len); | |
1453 | } | |
9ae110e2 | 1454 | /* Add filter bytecode next. */ |
6e911cad MD |
1455 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1456 | memcpy(varlen_data | |
1457 | + lsm.u.disable.expression_len, | |
1458 | &ctx->bytecode->b, | |
1459 | lsm.u.disable.bytecode_len); | |
1460 | } | |
1461 | ||
795a978d | 1462 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1463 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1464 | free(varlen_data); | |
1465 | ||
1466 | mem_error: | |
1467 | if (filter_expression && ctx) { | |
1468 | filter_bytecode_free(ctx); | |
1469 | filter_ir_free(ctx); | |
1470 | filter_parser_ctx_free(ctx); | |
1471 | } | |
1472 | filter_error: | |
1473 | if (free_filter_expression) { | |
1474 | /* | |
9ae110e2 JG |
1475 | * The filter expression has been replaced and must be freed as |
1476 | * it is not the original filter expression received as a | |
1477 | * parameter. | |
6e911cad MD |
1478 | */ |
1479 | free(filter_expression); | |
1480 | } | |
1481 | error: | |
1482 | /* | |
9ae110e2 JG |
1483 | * Return directly to the caller and don't ask the sessiond since |
1484 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1485 | */ |
1486 | return ret; | |
1487 | ||
1488 | ask_sessiond: | |
1489 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1490 | return ret; | |
1491 | } | |
1492 | ||
1493 | /* | |
9ae110e2 JG |
1494 | * Disable event(s) of a channel and domain. |
1495 | * If no event name is specified, all events are disabled. | |
1496 | * If no channel name is specified, the default 'channel0' is used. | |
1497 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1498 | */ |
1499 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1500 | const char *channel_name) | |
1501 | { | |
e1b624d0 | 1502 | int ret; |
6e911cad MD |
1503 | struct lttng_event ev; |
1504 | ||
1505 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1506 | ev.loglevel = -1; |
6e911cad | 1507 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1508 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1509 | if (ret) { | |
1510 | ret = -LTTNG_ERR_INVALID; | |
1511 | goto end; | |
1512 | } | |
1513 | ||
1514 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1515 | end: | |
1516 | return ret; | |
1df4dedd DG |
1517 | } |
1518 | ||
cf0bcb51 JG |
1519 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1520 | { | |
1521 | struct lttng_channel *channel = NULL; | |
1522 | struct lttng_channel_extended *extended = NULL; | |
1523 | ||
1524 | if (!domain) { | |
1525 | goto error; | |
1526 | } | |
1527 | ||
1528 | /* Validate domain. */ | |
1529 | switch (domain->type) { | |
1530 | case LTTNG_DOMAIN_UST: | |
1531 | switch (domain->buf_type) { | |
1532 | case LTTNG_BUFFER_PER_UID: | |
1533 | case LTTNG_BUFFER_PER_PID: | |
1534 | break; | |
1535 | default: | |
1536 | goto error; | |
1537 | } | |
1538 | break; | |
1539 | case LTTNG_DOMAIN_KERNEL: | |
1540 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1541 | goto error; | |
1542 | } | |
1543 | break; | |
1544 | default: | |
1545 | goto error; | |
1546 | } | |
1547 | ||
1548 | channel = zmalloc(sizeof(*channel)); | |
1549 | if (!channel) { | |
1550 | goto error; | |
1551 | } | |
1552 | ||
1553 | extended = zmalloc(sizeof(*extended)); | |
1554 | if (!extended) { | |
1555 | goto error; | |
1556 | } | |
1557 | ||
1558 | channel->attr.extended.ptr = extended; | |
1559 | ||
1560 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1561 | return channel; | |
1562 | error: | |
1563 | free(channel); | |
1564 | free(extended); | |
1565 | return NULL; | |
1566 | } | |
1567 | ||
1568 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1569 | { | |
1570 | if (!channel) { | |
1571 | return; | |
1572 | } | |
1573 | ||
1574 | if (channel->attr.extended.ptr) { | |
1575 | free(channel->attr.extended.ptr); | |
1576 | } | |
1577 | free(channel); | |
1578 | } | |
1579 | ||
1df4dedd | 1580 | /* |
9ae110e2 JG |
1581 | * Enable channel per domain |
1582 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1583 | */ |
cd80958d | 1584 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1585 | struct lttng_channel *in_chan) |
a5c5a2bd | 1586 | { |
e1b624d0 | 1587 | int ret; |
cd80958d | 1588 | struct lttcomm_session_msg lsm; |
09b72f7a | 1589 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1590 | |
9ae110e2 | 1591 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1592 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1593 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1594 | } |
1595 | ||
441c16a7 | 1596 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1597 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1598 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1599 | |
cf0bcb51 JG |
1600 | if (!in_chan->attr.extended.ptr) { |
1601 | struct lttng_channel *channel; | |
1602 | struct lttng_channel_extended *extended; | |
7d29a247 | 1603 | |
cf0bcb51 JG |
1604 | channel = lttng_channel_create(&handle->domain); |
1605 | if (!channel) { | |
1606 | return -LTTNG_ERR_NOMEM; | |
1607 | } | |
1608 | ||
1609 | /* | |
1610 | * Create a new channel in order to use default extended | |
1611 | * attribute values. | |
1612 | */ | |
1613 | extended = (struct lttng_channel_extended *) | |
1614 | channel->attr.extended.ptr; | |
1615 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1616 | lttng_channel_destroy(channel); | |
1617 | } else { | |
1618 | struct lttng_channel_extended *extended; | |
1619 | ||
1620 | extended = (struct lttng_channel_extended *) | |
1621 | in_chan->attr.extended.ptr; | |
1622 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1623 | } | |
cd80958d | 1624 | |
09b72f7a FD |
1625 | /* |
1626 | * Verify that the amount of memory required to create the requested | |
1627 | * buffer is available on the system at the moment. | |
1628 | */ | |
1629 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1630 | lsm.u.channel.chan.attr.subbuf_size; | |
1631 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1632 | return -LTTNG_ERR_NOMEM; | |
1633 | } | |
1634 | ||
cf0bcb51 | 1635 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1636 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1637 | |
e1b624d0 JG |
1638 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1639 | sizeof(lsm.session.name)); | |
1640 | if (ret) { | |
1641 | ret = -LTTNG_ERR_INVALID; | |
1642 | goto end; | |
1643 | } | |
cd80958d | 1644 | |
e1b624d0 JG |
1645 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1646 | end: | |
1647 | return ret; | |
8c0faa1d | 1648 | } |
1df4dedd | 1649 | |
2ef84c95 | 1650 | /* |
9ae110e2 JG |
1651 | * All tracing will be stopped for registered events of the channel. |
1652 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1653 | */ |
cd80958d | 1654 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1655 | { |
e1b624d0 | 1656 | int ret; |
cd80958d DG |
1657 | struct lttcomm_session_msg lsm; |
1658 | ||
9ae110e2 | 1659 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1660 | if (handle == NULL || name == NULL) { |
2f70b271 | 1661 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1662 | } |
1663 | ||
441c16a7 MD |
1664 | memset(&lsm, 0, sizeof(lsm)); |
1665 | ||
cd80958d | 1666 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1667 | |
e1b624d0 | 1668 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1669 | sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1670 | if (ret) { |
1671 | ret = -LTTNG_ERR_INVALID; | |
1672 | goto end; | |
1673 | } | |
9d697d3d | 1674 | |
60160d2a | 1675 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1676 | |
e1b624d0 JG |
1677 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1678 | sizeof(lsm.session.name)); | |
1679 | if (ret) { | |
1680 | ret = -LTTNG_ERR_INVALID; | |
1681 | goto end; | |
1682 | } | |
cd80958d | 1683 | |
e1b624d0 JG |
1684 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1685 | end: | |
1686 | return ret; | |
ca95a216 DG |
1687 | } |
1688 | ||
fac6795d | 1689 | /* |
9ae110e2 JG |
1690 | * Lists all available tracepoints of domain. |
1691 | * Sets the contents of the events array. | |
1692 | * Returns the number of lttng_event entries in events; | |
1693 | * on error, returns a negative value. | |
fac6795d | 1694 | */ |
cd80958d | 1695 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1696 | struct lttng_event **events) |
fac6795d | 1697 | { |
052da939 | 1698 | int ret; |
cd80958d DG |
1699 | struct lttcomm_session_msg lsm; |
1700 | ||
9d697d3d | 1701 | if (handle == NULL) { |
2f70b271 | 1702 | return -LTTNG_ERR_INVALID; |
cd80958d | 1703 | } |
fac6795d | 1704 | |
53efb85a | 1705 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1706 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1707 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1708 | |
cac3069d | 1709 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1710 | if (ret < 0) { |
1711 | return ret; | |
eb354453 | 1712 | } |
fac6795d | 1713 | |
9f19cc17 | 1714 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1715 | } |
1716 | ||
f37d259d | 1717 | /* |
9ae110e2 JG |
1718 | * Lists all available tracepoint fields of domain. |
1719 | * Sets the contents of the event field array. | |
1720 | * Returns the number of lttng_event_field entries in events; | |
1721 | * on error, returns a negative value. | |
f37d259d MD |
1722 | */ |
1723 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1724 | struct lttng_event_field **fields) | |
1725 | { | |
1726 | int ret; | |
1727 | struct lttcomm_session_msg lsm; | |
1728 | ||
1729 | if (handle == NULL) { | |
2f70b271 | 1730 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1731 | } |
1732 | ||
53efb85a | 1733 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1734 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1735 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1736 | |
cac3069d | 1737 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1738 | if (ret < 0) { |
1739 | return ret; | |
1740 | } | |
1741 | ||
1742 | return ret / sizeof(struct lttng_event_field); | |
1743 | } | |
1744 | ||
834978fd | 1745 | /* |
9ae110e2 JG |
1746 | * Lists all available kernel system calls. Allocates and sets the contents of |
1747 | * the events array. | |
834978fd | 1748 | * |
9ae110e2 JG |
1749 | * Returns the number of lttng_event entries in events; on error, returns a |
1750 | * negative value. | |
834978fd DG |
1751 | */ |
1752 | int lttng_list_syscalls(struct lttng_event **events) | |
1753 | { | |
1754 | int ret; | |
1755 | struct lttcomm_session_msg lsm; | |
1756 | ||
1757 | if (!events) { | |
1758 | return -LTTNG_ERR_INVALID; | |
1759 | } | |
1760 | ||
1761 | memset(&lsm, 0, sizeof(lsm)); | |
1762 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1763 | /* Force kernel domain for system calls. */ | |
1764 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1765 | ||
1766 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1767 | if (ret < 0) { | |
1768 | return ret; | |
1769 | } | |
1770 | ||
1771 | return ret / sizeof(struct lttng_event); | |
1772 | } | |
1773 | ||
1657e9bb | 1774 | /* |
9ae110e2 JG |
1775 | * Returns a human readable string describing |
1776 | * the error code (a negative value). | |
1657e9bb | 1777 | */ |
9a745bc7 | 1778 | const char *lttng_strerror(int code) |
1657e9bb | 1779 | { |
f73fabfd | 1780 | return error_get_str(code); |
1657e9bb DG |
1781 | } |
1782 | ||
b178f53e JG |
1783 | enum lttng_error_code lttng_create_session_ext( |
1784 | struct lttng_session_descriptor *session_descriptor) | |
1785 | { | |
1786 | enum lttng_error_code ret_code; | |
1787 | struct lttcomm_session_msg lsm = { | |
1788 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1789 | }; | |
1790 | void *reply = NULL; | |
1791 | struct lttng_buffer_view reply_view; | |
1792 | int reply_ret; | |
1793 | bool sessiond_must_generate_ouput; | |
1794 | struct lttng_dynamic_buffer payload; | |
1795 | int ret; | |
1796 | size_t descriptor_size; | |
1797 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1798 | ||
1799 | lttng_dynamic_buffer_init(&payload); | |
1800 | if (!session_descriptor) { | |
1801 | ret_code = LTTNG_ERR_INVALID; | |
1802 | goto end; | |
1803 | } | |
1804 | ||
1805 | sessiond_must_generate_ouput = | |
1806 | !lttng_session_descriptor_is_output_destination_initialized( | |
1807 | session_descriptor); | |
1808 | if (sessiond_must_generate_ouput) { | |
1809 | const char *home_dir = utils_get_home_dir(); | |
1810 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1811 | ||
1812 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1813 | ret_code = LTTNG_ERR_FATAL; | |
1814 | goto end; | |
1815 | } | |
1816 | ||
1817 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1818 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1819 | home_dir_len); | |
1820 | if (ret) { | |
1821 | ret_code = LTTNG_ERR_NOMEM; | |
1822 | goto end; | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | descriptor_size = payload.size; | |
1827 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1828 | &payload); | |
1829 | if (ret) { | |
1830 | ret_code = LTTNG_ERR_INVALID; | |
1831 | goto end; | |
1832 | } | |
1833 | descriptor_size = payload.size - descriptor_size; | |
1834 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1835 | ||
1836 | /* Command returns a session descriptor on success. */ | |
1837 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1838 | payload.size, &reply); | |
1839 | if (reply_ret < 0) { | |
1840 | ret_code = -reply_ret; | |
1841 | goto end; | |
1842 | } else if (reply_ret == 0) { | |
1843 | /* Socket unexpectedly closed by the session daemon. */ | |
1844 | ret_code = LTTNG_ERR_FATAL; | |
1845 | goto end; | |
1846 | } | |
1847 | ||
1848 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1849 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1850 | &descriptor_reply); | |
1851 | if (ret < 0) { | |
1852 | ret_code = LTTNG_ERR_FATAL; | |
1853 | goto end; | |
1854 | } | |
1855 | ret_code = LTTNG_OK; | |
1856 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1857 | end: | |
1858 | free(reply); | |
1859 | lttng_dynamic_buffer_reset(&payload); | |
1860 | lttng_session_descriptor_destroy(descriptor_reply); | |
1861 | return ret_code; | |
1862 | } | |
1863 | ||
aaf97519 | 1864 | /* |
b178f53e | 1865 | * Create a new session using name and url for destination. |
a4b92340 | 1866 | * |
780d4bb8 | 1867 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1868 | */ |
a4b92340 | 1869 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1870 | { |
3dd05a85 | 1871 | int ret; |
a4b92340 | 1872 | ssize_t size; |
a4b92340 | 1873 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1874 | struct lttng_session_descriptor *descriptor = NULL; |
1875 | enum lttng_error_code ret_code; | |
00e2e675 | 1876 | |
b178f53e JG |
1877 | if (!name) { |
1878 | ret = -LTTNG_ERR_INVALID; | |
1879 | goto end; | |
00e2e675 DG |
1880 | } |
1881 | ||
bc894455 | 1882 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1883 | if (size < 0) { |
b178f53e JG |
1884 | ret = -LTTNG_ERR_INVALID; |
1885 | goto end; | |
1886 | } | |
1887 | switch (size) { | |
1888 | case 0: | |
1889 | descriptor = lttng_session_descriptor_create(name); | |
1890 | break; | |
1891 | case 1: | |
1892 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1893 | ret = -LTTNG_ERR_INVALID; | |
1894 | goto end; | |
1895 | } | |
1896 | descriptor = lttng_session_descriptor_local_create(name, | |
1897 | uris[0].dst.path); | |
1898 | break; | |
1899 | case 2: | |
1900 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1901 | NULL); | |
1902 | break; | |
1903 | default: | |
1904 | ret = -LTTNG_ERR_INVALID; | |
1905 | goto end; | |
1906 | } | |
1907 | if (!descriptor) { | |
1908 | ret = -LTTNG_ERR_INVALID; | |
1909 | goto end; | |
00e2e675 | 1910 | } |
b178f53e JG |
1911 | ret_code = lttng_create_session_ext(descriptor); |
1912 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1913 | end: | |
1914 | lttng_session_descriptor_destroy(descriptor); | |
1915 | free(uris); | |
1916 | return ret; | |
1917 | } | |
00e2e675 | 1918 | |
b178f53e JG |
1919 | /* |
1920 | * Create a session exclusively used for snapshot. | |
1921 | * | |
780d4bb8 | 1922 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1923 | */ |
1924 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1925 | { | |
1926 | int ret; | |
1927 | enum lttng_error_code ret_code; | |
1928 | ssize_t size; | |
1929 | struct lttng_uri *uris = NULL; | |
1930 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1931 | |
b178f53e JG |
1932 | if (!name) { |
1933 | ret = -LTTNG_ERR_INVALID; | |
1934 | goto end; | |
1935 | } | |
1936 | ||
1937 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1938 | if (size < 0) { | |
1939 | ret = -LTTNG_ERR_INVALID; | |
1940 | goto end; | |
1941 | } | |
1942 | /* | |
1943 | * If the user does not specify a custom subdir, use the session name. | |
1944 | */ | |
1945 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1946 | strlen(uris[0].subdir) == 0) { | |
1947 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1948 | name); | |
1949 | if (ret < 0) { | |
1950 | PERROR("Failed to set session name as network destination sub-directory"); | |
1951 | ret = -LTTNG_ERR_FATAL; | |
1952 | goto end; | |
1953 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1954 | /* Truncated output. */ | |
1955 | ret = -LTTNG_ERR_INVALID; | |
1956 | goto end; | |
1957 | } | |
1958 | } | |
3dd05a85 | 1959 | |
b178f53e JG |
1960 | switch (size) { |
1961 | case 0: | |
1962 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1963 | break; | |
1964 | case 1: | |
1965 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1966 | ret = -LTTNG_ERR_INVALID; | |
1967 | goto end; | |
1968 | } | |
1969 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1970 | name, | |
1971 | uris[0].dst.path); | |
1972 | break; | |
1973 | case 2: | |
1974 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1975 | name, | |
1976 | snapshot_url, | |
1977 | NULL); | |
1978 | break; | |
1979 | default: | |
1980 | ret = -LTTNG_ERR_INVALID; | |
1981 | goto end; | |
1982 | } | |
1983 | if (!descriptor) { | |
1984 | ret = -LTTNG_ERR_INVALID; | |
1985 | goto end; | |
1986 | } | |
1987 | ret_code = lttng_create_session_ext(descriptor); | |
1988 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1989 | end: | |
1990 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1991 | free(uris); |
1992 | return ret; | |
00e2e675 DG |
1993 | } |
1994 | ||
b178f53e JG |
1995 | /* |
1996 | * Create a session exclusively used for live. | |
1997 | * | |
780d4bb8 | 1998 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1999 | */ |
2000 | int lttng_create_session_live(const char *name, const char *url, | |
2001 | unsigned int timer_interval) | |
2002 | { | |
2003 | int ret; | |
2004 | enum lttng_error_code ret_code; | |
2005 | struct lttng_session_descriptor *descriptor = NULL; | |
2006 | ||
2007 | if (!name) { | |
2008 | ret = -LTTNG_ERR_INVALID; | |
2009 | goto end; | |
2010 | } | |
2011 | ||
2012 | if (url) { | |
2013 | descriptor = lttng_session_descriptor_live_network_create( | |
2014 | name, url, NULL, timer_interval); | |
2015 | } else { | |
2016 | descriptor = lttng_session_descriptor_live_create( | |
2017 | name, timer_interval); | |
2018 | } | |
2019 | if (!descriptor) { | |
2020 | ret = -LTTNG_ERR_INVALID; | |
2021 | goto end; | |
2022 | } | |
2023 | ret_code = lttng_create_session_ext(descriptor); | |
2024 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2025 | end: | |
2026 | lttng_session_descriptor_destroy(descriptor); | |
2027 | return ret; | |
2028 | } | |
2029 | ||
e20ee7c2 JD |
2030 | /* |
2031 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2032 | * |
2033 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2034 | */ |
2035 | int lttng_destroy_session(const char *session_name) | |
2036 | { | |
2037 | int ret; | |
3e3665b8 JG |
2038 | enum lttng_error_code ret_code; |
2039 | enum lttng_destruction_handle_status status; | |
2040 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2041 | |
2042 | /* | |
3e3665b8 JG |
2043 | * Stop the tracing and wait for the data to be |
2044 | * consumed. | |
e20ee7c2 JD |
2045 | */ |
2046 | ret = _lttng_stop_tracing(session_name, 1); | |
2047 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2048 | goto end; | |
2049 | } | |
2050 | ||
3e3665b8 JG |
2051 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2052 | if (ret_code != LTTNG_OK) { | |
2053 | ret = (int) -ret_code; | |
2054 | goto end; | |
2055 | } | |
2056 | assert(handle); | |
2057 | ||
2058 | /* Block until the completion of the destruction of the session. */ | |
2059 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2060 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2061 | ret = -LTTNG_ERR_UNK; | |
2062 | goto end; | |
2063 | } | |
2064 | ||
2065 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2066 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2067 | ret = -LTTNG_ERR_UNK; | |
2068 | goto end; | |
2069 | } | |
780d4bb8 | 2070 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2071 | end: |
3e3665b8 | 2072 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2073 | return ret; |
2074 | } | |
2075 | ||
2076 | /* | |
2077 | * Destroy the session without waiting for the data. | |
2078 | */ | |
2079 | int lttng_destroy_session_no_wait(const char *session_name) | |
2080 | { | |
3e3665b8 | 2081 | enum lttng_error_code ret_code; |
e20ee7c2 | 2082 | |
3e3665b8 | 2083 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
3204017e | 2084 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2085 | } |
2086 | ||
57167058 | 2087 | /* |
9ae110e2 JG |
2088 | * Ask the session daemon for all available sessions. |
2089 | * Sets the contents of the sessions array. | |
2090 | * Returns the number of lttng_session entries in sessions; | |
2091 | * on error, returns a negative value. | |
57167058 | 2092 | */ |
b178f53e | 2093 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2094 | { |
ca95a216 | 2095 | int ret; |
cd80958d | 2096 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2097 | const size_t session_size = sizeof(struct lttng_session) + |
2098 | sizeof(struct lttng_session_extended); | |
2099 | size_t session_count, i; | |
2100 | struct lttng_session_extended *sessions_extended_begin; | |
2101 | struct lttng_session *sessions = NULL; | |
57167058 | 2102 | |
53efb85a | 2103 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2104 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
b178f53e JG |
2105 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2106 | if (ret <= 0) { | |
b178f53e JG |
2107 | goto end; |
2108 | } | |
2109 | if (!sessions) { | |
2110 | ret = -LTTNG_ERR_FATAL; | |
2111 | goto end; | |
2112 | } | |
2113 | ||
2114 | if (ret % session_size) { | |
2115 | ret = -LTTNG_ERR_UNK; | |
2116 | free(sessions); | |
2117 | *out_sessions = NULL; | |
2118 | goto end; | |
57167058 | 2119 | } |
b178f53e JG |
2120 | session_count = (size_t) ret / session_size; |
2121 | sessions_extended_begin = (struct lttng_session_extended *) | |
2122 | (&sessions[session_count]); | |
57167058 | 2123 | |
b178f53e JG |
2124 | /* Set extended session info pointers. */ |
2125 | for (i = 0; i < session_count; i++) { | |
2126 | struct lttng_session *session = &sessions[i]; | |
2127 | struct lttng_session_extended *extended = | |
2128 | &(sessions_extended_begin[i]); | |
2129 | ||
2130 | session->extended.ptr = extended; | |
2131 | } | |
2132 | ||
2133 | ret = (int) session_count; | |
2134 | *out_sessions = sessions; | |
2135 | end: | |
2136 | return ret; | |
2137 | } | |
2138 | ||
2139 | enum lttng_error_code lttng_session_get_creation_time( | |
2140 | const struct lttng_session *session, uint64_t *creation_time) | |
2141 | { | |
2142 | enum lttng_error_code ret = LTTNG_OK; | |
2143 | struct lttng_session_extended *extended; | |
2144 | ||
2145 | if (!session || !creation_time || !session->extended.ptr) { | |
2146 | ret = LTTNG_ERR_INVALID; | |
2147 | goto end; | |
2148 | } | |
2149 | ||
2150 | extended = session->extended.ptr; | |
2151 | if (!extended->creation_time.is_set) { | |
2152 | /* Not created on the session daemon yet. */ | |
2153 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2154 | goto end; | |
2155 | } | |
2156 | *creation_time = extended->creation_time.value; | |
2157 | end: | |
2158 | return ret; | |
57167058 DG |
2159 | } |
2160 | ||
d7ba1388 MD |
2161 | int lttng_set_session_shm_path(const char *session_name, |
2162 | const char *shm_path) | |
2163 | { | |
e1b624d0 | 2164 | int ret; |
d7ba1388 MD |
2165 | struct lttcomm_session_msg lsm; |
2166 | ||
2167 | if (session_name == NULL) { | |
2168 | return -LTTNG_ERR_INVALID; | |
2169 | } | |
2170 | ||
2171 | memset(&lsm, 0, sizeof(lsm)); | |
2172 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2173 | ||
e1b624d0 | 2174 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2175 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2176 | if (ret) { |
2177 | ret = -LTTNG_ERR_INVALID; | |
2178 | goto end; | |
2179 | } | |
2180 | ||
2181 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2182 | sizeof(lsm.u.set_shm_path.shm_path)); |
e1b624d0 JG |
2183 | if (ret) { |
2184 | ret = -LTTNG_ERR_INVALID; | |
2185 | goto end; | |
2186 | } | |
d7ba1388 | 2187 | |
e1b624d0 JG |
2188 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2189 | end: | |
2190 | return ret; | |
d7ba1388 MD |
2191 | } |
2192 | ||
9f19cc17 | 2193 | /* |
9ae110e2 JG |
2194 | * Ask the session daemon for all available domains of a session. |
2195 | * Sets the contents of the domains array. | |
2196 | * Returns the number of lttng_domain entries in domains; | |
2197 | * on error, returns a negative value. | |
9f19cc17 | 2198 | */ |
330be774 | 2199 | int lttng_list_domains(const char *session_name, |
cd80958d | 2200 | struct lttng_domain **domains) |
9f19cc17 DG |
2201 | { |
2202 | int ret; | |
cd80958d DG |
2203 | struct lttcomm_session_msg lsm; |
2204 | ||
330be774 | 2205 | if (session_name == NULL) { |
e1b624d0 JG |
2206 | ret = -LTTNG_ERR_INVALID; |
2207 | goto error; | |
cd80958d | 2208 | } |
9f19cc17 | 2209 | |
53efb85a | 2210 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2211 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2212 | ||
e1b624d0 | 2213 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2214 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2215 | if (ret) { |
2216 | ret = -LTTNG_ERR_INVALID; | |
2217 | goto error; | |
2218 | } | |
cd80958d | 2219 | |
cac3069d | 2220 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2221 | if (ret < 0) { |
e1b624d0 | 2222 | goto error; |
9f19cc17 DG |
2223 | } |
2224 | ||
2225 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2226 | error: |
2227 | return ret; | |
9f19cc17 DG |
2228 | } |
2229 | ||
2230 | /* | |
9ae110e2 JG |
2231 | * Ask the session daemon for all available channels of a session. |
2232 | * Sets the contents of the channels array. | |
2233 | * Returns the number of lttng_channel entries in channels; | |
2234 | * on error, returns a negative value. | |
9f19cc17 | 2235 | */ |
cd80958d DG |
2236 | int lttng_list_channels(struct lttng_handle *handle, |
2237 | struct lttng_channel **channels) | |
9f19cc17 DG |
2238 | { |
2239 | int ret; | |
53e367f9 JG |
2240 | size_t channel_count, i; |
2241 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2242 | sizeof(struct lttng_channel_extended); |
cd80958d | 2243 | struct lttcomm_session_msg lsm; |
53e367f9 | 2244 | void *extended_at; |
cd80958d | 2245 | |
9d697d3d | 2246 | if (handle == NULL) { |
53e367f9 JG |
2247 | ret = -LTTNG_ERR_INVALID; |
2248 | goto end; | |
cd80958d DG |
2249 | } |
2250 | ||
53efb85a | 2251 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2252 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
e1b624d0 | 2253 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2254 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2255 | if (ret) { |
2256 | ret = -LTTNG_ERR_INVALID; | |
2257 | goto end; | |
2258 | } | |
9f19cc17 | 2259 | |
60160d2a | 2260 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2261 | |
cac3069d | 2262 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2263 | if (ret < 0) { |
53e367f9 JG |
2264 | goto end; |
2265 | } | |
2266 | ||
2267 | if (ret % channel_size) { | |
2268 | ret = -LTTNG_ERR_UNK; | |
2269 | free(*channels); | |
2270 | *channels = NULL; | |
2271 | goto end; | |
9f19cc17 | 2272 | } |
53e367f9 | 2273 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2274 | |
53e367f9 JG |
2275 | /* Set extended info pointers */ |
2276 | extended_at = ((void *) *channels) + | |
2277 | channel_count * sizeof(struct lttng_channel); | |
2278 | for (i = 0; i < channel_count; i++) { | |
2279 | struct lttng_channel *chan = &(*channels)[i]; | |
2280 | ||
2281 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2282 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2283 | } |
2284 | ||
2285 | ret = (int) channel_count; | |
2286 | end: | |
2287 | return ret; | |
9f19cc17 DG |
2288 | } |
2289 | ||
2290 | /* | |
9ae110e2 JG |
2291 | * Ask the session daemon for all available events of a session channel. |
2292 | * Sets the contents of the events array. | |
2293 | * Returns the number of lttng_event entries in events; | |
2294 | * on error, returns a negative value. | |
9f19cc17 | 2295 | */ |
cd80958d DG |
2296 | int lttng_list_events(struct lttng_handle *handle, |
2297 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2298 | { |
2299 | int ret; | |
e368fb43 JG |
2300 | struct lttcomm_session_msg lsm = {}; |
2301 | const struct lttcomm_event_command_header *cmd_header = NULL; | |
b4e3ceb9 | 2302 | uint32_t nb_events, i; |
e368fb43 | 2303 | const void *comm_ext_at; |
56f0bc67 | 2304 | struct lttng_dynamic_buffer listing; |
de453daa | 2305 | size_t storage_req; |
e368fb43 JG |
2306 | struct lttng_payload payload; |
2307 | struct lttng_payload payload_copy; | |
2308 | struct lttng_payload_view lsm_view = | |
2309 | lttng_payload_view_init_from_buffer( | |
2310 | (const char *) &lsm, 0, sizeof(lsm)); | |
2311 | struct lttng_buffer_view cmd_header_view; | |
2312 | struct lttng_buffer_view cmd_payload_view; | |
2313 | struct lttng_buffer_view flat_events_view; | |
2314 | struct lttng_buffer_view ext_view; | |
9f19cc17 | 2315 | |
9d697d3d DG |
2316 | /* Safety check. An handle and channel name are mandatory */ |
2317 | if (handle == NULL || channel_name == NULL) { | |
e368fb43 JG |
2318 | ret = -LTTNG_ERR_INVALID; |
2319 | goto end; | |
cd80958d DG |
2320 | } |
2321 | ||
e368fb43 JG |
2322 | lttng_payload_init(&payload); |
2323 | lttng_payload_init(&payload_copy); | |
2324 | ||
cd80958d | 2325 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
e1b624d0 | 2326 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2327 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2328 | if (ret) { |
2329 | ret = -LTTNG_ERR_INVALID; | |
2330 | goto end; | |
2331 | } | |
2332 | ||
2333 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2334 | sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2335 | if (ret) { |
2336 | ret = -LTTNG_ERR_INVALID; | |
2337 | goto end; | |
2338 | } | |
2339 | ||
60160d2a | 2340 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2341 | |
e368fb43 | 2342 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &payload); |
9f19cc17 | 2343 | if (ret < 0) { |
de453daa | 2344 | goto end; |
9f19cc17 DG |
2345 | } |
2346 | ||
e368fb43 JG |
2347 | /* |
2348 | * A copy of the payload is performed since it will be | |
2349 | * consumed twice. Consuming the same payload twice is invalid since | |
2350 | * it will cause any received file descriptor to become "shared" | |
2351 | * between different instances of the resulting objects. | |
2352 | */ | |
2353 | ret = lttng_payload_copy(&payload, &payload_copy); | |
2354 | if (ret) { | |
2355 | ret = -LTTNG_ERR_NOMEM; | |
2356 | goto end; | |
2357 | } | |
2358 | ||
2359 | cmd_header_view = lttng_buffer_view_from_dynamic_buffer( | |
2360 | &payload.buffer, 0, sizeof(*cmd_header)); | |
3e6e0df2 | 2361 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { |
e368fb43 | 2362 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
d9f484bc JG |
2363 | goto end; |
2364 | } | |
2365 | ||
e368fb43 JG |
2366 | cmd_header = (typeof(cmd_header)) cmd_header_view.data; |
2367 | ||
b4e3ceb9 PP |
2368 | /* Set number of events and free command header */ |
2369 | nb_events = cmd_header->nb_events; | |
2370 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2371 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2372 | goto end; |
b4e3ceb9 | 2373 | } |
e368fb43 JG |
2374 | |
2375 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( | |
2376 | &payload.buffer, sizeof(*cmd_header), -1); | |
b4e3ceb9 | 2377 | |
de453daa JG |
2378 | /* |
2379 | * The buffer that is returned must contain a "flat" version of | |
2380 | * the events that are returned. In other words, all pointers | |
2381 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2382 | * buffer so that the user may free everything by simply calling free() |
2383 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2384 | * compatibility. |
2385 | * | |
56f0bc67 JG |
2386 | * A first pass is performed to compute the size of the buffer that |
2387 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2388 | * the returned events so that their members always point within the |
2389 | * buffer. | |
2390 | * | |
2391 | * The layout of the returned buffer is as follows: | |
2392 | * - struct lttng_event[nb_events], | |
2393 | * - nb_events times the following: | |
2394 | * - struct lttng_event_extended, | |
2395 | * - flattened version of userspace_probe_location | |
2396 | * - filter_expression | |
2397 | * - exclusions | |
2398 | * - padding to align to 64-bits | |
2399 | */ | |
e368fb43 JG |
2400 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2401 | nb_events * sizeof(struct lttng_event), -1); | |
2402 | comm_ext_at = ext_view.data; | |
de453daa | 2403 | storage_req = nb_events * sizeof(struct lttng_event); |
e368fb43 JG |
2404 | { |
2405 | struct lttng_payload_view payload_view = | |
2406 | lttng_payload_view_from_payload(&payload, 0, -1); | |
b4e3ceb9 | 2407 | |
e368fb43 JG |
2408 | for (i = 0; i < nb_events; i++) { |
2409 | const struct lttcomm_event_extended_header *ext_comm = | |
2410 | (struct lttcomm_event_extended_header *) | |
2411 | comm_ext_at; | |
2412 | int probe_storage_req = 0; | |
b4e3ceb9 | 2413 | |
e368fb43 JG |
2414 | comm_ext_at += sizeof(*ext_comm); |
2415 | comm_ext_at += ext_comm->filter_len; | |
2416 | comm_ext_at += ext_comm->nb_exclusions * | |
2417 | LTTNG_SYMBOL_NAME_LEN; | |
2418 | ||
2419 | if (ext_comm->userspace_probe_location_len) { | |
2420 | struct lttng_userspace_probe_location | |
2421 | *probe_location = NULL; | |
2422 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2423 | &payload_view, | |
2424 | (const char *) comm_ext_at - | |
2425 | payload_view.buffer.data, | |
2426 | ext_comm->userspace_probe_location_len); | |
56f0bc67 | 2427 | |
3e6e0df2 JG |
2428 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2429 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2430 | goto end; | |
2431 | } | |
2432 | ||
e368fb43 JG |
2433 | /* |
2434 | * Create a temporary userspace probe location | |
2435 | * to determine the size needed by a "flattened" | |
2436 | * version of that same probe location. | |
2437 | */ | |
2438 | ret = lttng_userspace_probe_location_create_from_payload( | |
2439 | &probe_location_view, | |
2440 | &probe_location); | |
2441 | if (ret < 0) { | |
2442 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2443 | goto end; | |
2444 | } | |
56f0bc67 | 2445 | |
e368fb43 JG |
2446 | ret = lttng_userspace_probe_location_flatten( |
2447 | probe_location, NULL); | |
2448 | lttng_userspace_probe_location_destroy( | |
2449 | probe_location); | |
2450 | if (ret < 0) { | |
2451 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2452 | goto end; | |
2453 | } | |
56f0bc67 | 2454 | |
e368fb43 JG |
2455 | probe_storage_req = ret; |
2456 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2457 | } |
2458 | ||
e368fb43 JG |
2459 | storage_req += sizeof(struct lttng_event_extended); |
2460 | storage_req += ext_comm->filter_len; | |
2461 | storage_req += ext_comm->nb_exclusions * | |
2462 | LTTNG_SYMBOL_NAME_LEN; | |
2463 | /* Padding to ensure the flat probe is aligned. */ | |
2464 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2465 | storage_req += probe_storage_req; | |
56f0bc67 | 2466 | } |
b4e3ceb9 PP |
2467 | } |
2468 | ||
56f0bc67 JG |
2469 | lttng_dynamic_buffer_init(&listing); |
2470 | /* | |
2471 | * We must ensure that "listing" is never resized so as to preserve | |
2472 | * the validity of the flattened objects. | |
2473 | */ | |
2474 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2475 | if (ret) { | |
2476 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2477 | goto end; |
2478 | } | |
56f0bc67 | 2479 | |
e368fb43 JG |
2480 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( |
2481 | &payload_copy.buffer, sizeof(*cmd_header), -1); | |
2482 | flat_events_view = lttng_buffer_view_from_view(&cmd_payload_view, 0, | |
56f0bc67 | 2483 | nb_events * sizeof(struct lttng_event)); |
e368fb43 | 2484 | ret = lttng_dynamic_buffer_append_view(&listing, &flat_events_view); |
56f0bc67 JG |
2485 | if (ret) { |
2486 | ret = -LTTNG_ERR_NOMEM; | |
2487 | goto free_dynamic_buffer; | |
2488 | } | |
de453daa | 2489 | |
e368fb43 JG |
2490 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2491 | nb_events * sizeof(struct lttng_event), -1); | |
2492 | comm_ext_at = ext_view.data; | |
2493 | ||
2494 | { | |
2495 | struct lttng_payload_view payload_copy_view = | |
2496 | lttng_payload_view_from_payload( | |
2497 | &payload_copy, 0, -1); | |
2498 | ||
2499 | for (i = 0; i < nb_events; i++) { | |
2500 | struct lttng_event *event = (typeof(event))( | |
2501 | listing.data + | |
2502 | (sizeof(struct lttng_event) * i)); | |
2503 | const struct lttcomm_event_extended_header *ext_comm = | |
2504 | (typeof(ext_comm)) comm_ext_at; | |
2505 | struct lttng_event_extended *event_extended = | |
2506 | (typeof(event_extended))(listing.data + | |
2507 | listing.size); | |
2508 | ||
2509 | /* Insert struct lttng_event_extended. */ | |
2510 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2511 | listing.size + sizeof(*event_extended)); | |
56f0bc67 JG |
2512 | if (ret) { |
2513 | ret = -LTTNG_ERR_NOMEM; | |
2514 | goto free_dynamic_buffer; | |
2515 | } | |
e368fb43 JG |
2516 | event->extended.ptr = event_extended; |
2517 | ||
2518 | comm_ext_at += sizeof(*ext_comm); | |
2519 | ||
2520 | /* Insert filter expression. */ | |
2521 | if (ext_comm->filter_len) { | |
2522 | event_extended->filter_expression = | |
2523 | listing.data + listing.size; | |
2524 | ret = lttng_dynamic_buffer_append(&listing, | |
2525 | comm_ext_at, | |
2526 | ext_comm->filter_len); | |
2527 | if (ret) { | |
2528 | ret = -LTTNG_ERR_NOMEM; | |
2529 | goto free_dynamic_buffer; | |
2530 | } | |
2531 | comm_ext_at += ext_comm->filter_len; | |
2532 | } | |
56f0bc67 | 2533 | |
e368fb43 JG |
2534 | /* Insert exclusions. */ |
2535 | if (ext_comm->nb_exclusions) { | |
2536 | event_extended->exclusions.count = | |
2537 | ext_comm->nb_exclusions; | |
2538 | event_extended->exclusions.strings = | |
2539 | listing.data + listing.size; | |
2540 | ||
2541 | ret = lttng_dynamic_buffer_append(&listing, | |
2542 | comm_ext_at, | |
2543 | ext_comm->nb_exclusions * | |
2544 | LTTNG_SYMBOL_NAME_LEN); | |
2545 | if (ret) { | |
2546 | ret = -LTTNG_ERR_NOMEM; | |
2547 | goto free_dynamic_buffer; | |
2548 | } | |
2549 | comm_ext_at += ext_comm->nb_exclusions * | |
2550 | LTTNG_SYMBOL_NAME_LEN; | |
2551 | } | |
56f0bc67 | 2552 | |
e368fb43 JG |
2553 | /* Insert padding to align to 64-bits. */ |
2554 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2555 | ALIGN_TO(listing.size, | |
2556 | sizeof(uint64_t))); | |
56f0bc67 JG |
2557 | if (ret) { |
2558 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2559 | goto free_dynamic_buffer; |
56f0bc67 | 2560 | } |
56f0bc67 | 2561 | |
e368fb43 JG |
2562 | /* Insert flattened userspace probe location. */ |
2563 | if (ext_comm->userspace_probe_location_len) { | |
2564 | struct lttng_userspace_probe_location | |
2565 | *probe_location = NULL; | |
2566 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2567 | &payload_copy_view, | |
2568 | (const char *) comm_ext_at - | |
2569 | payload_copy_view.buffer.data, | |
2570 | ext_comm->userspace_probe_location_len); | |
2571 | ||
3e6e0df2 JG |
2572 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2573 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2574 | goto free_dynamic_buffer; | |
2575 | } | |
2576 | ||
e368fb43 JG |
2577 | ret = lttng_userspace_probe_location_create_from_payload( |
2578 | &probe_location_view, | |
2579 | &probe_location); | |
2580 | if (ret < 0) { | |
2581 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2582 | goto free_dynamic_buffer; | |
2583 | } | |
de453daa | 2584 | |
e368fb43 JG |
2585 | event_extended->probe_location = (struct lttng_userspace_probe_location |
2586 | *) (listing.data + | |
2587 | listing.size); | |
2588 | ret = lttng_userspace_probe_location_flatten( | |
2589 | probe_location, &listing); | |
2590 | lttng_userspace_probe_location_destroy( | |
2591 | probe_location); | |
2592 | if (ret < 0) { | |
2593 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2594 | goto free_dynamic_buffer; | |
2595 | } | |
56f0bc67 | 2596 | |
e368fb43 | 2597 | comm_ext_at += ext_comm->userspace_probe_location_len; |
56f0bc67 | 2598 | } |
56f0bc67 | 2599 | } |
de453daa JG |
2600 | } |
2601 | ||
56f0bc67 JG |
2602 | /* Don't reset listing buffer as we return its content. */ |
2603 | *events = (struct lttng_event *) listing.data; | |
2604 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2605 | ret = (int) nb_events; |
56f0bc67 JG |
2606 | free_dynamic_buffer: |
2607 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2608 | end: |
e368fb43 JG |
2609 | lttng_payload_reset(&payload); |
2610 | lttng_payload_reset(&payload_copy); | |
b4e3ceb9 | 2611 | return ret; |
9f19cc17 DG |
2612 | } |
2613 | ||
fac6795d | 2614 | /* |
1c8d13c8 TD |
2615 | * Sets the tracing_group variable with name. |
2616 | * This function allocates memory pointed to by tracing_group. | |
2617 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2618 | */ |
2619 | int lttng_set_tracing_group(const char *name) | |
2620 | { | |
9d697d3d | 2621 | if (name == NULL) { |
2f70b271 | 2622 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2623 | } |
2624 | ||
fac6795d | 2625 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2626 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2627 | } |
2628 | ||
2629 | return 0; | |
2630 | } | |
2631 | ||
cd80958d | 2632 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2633 | struct lttng_calibrate *calibrate) |
2634 | { | |
b812e5ca PP |
2635 | /* |
2636 | * This command was removed in LTTng 2.9. | |
2637 | */ | |
2638 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2639 | } |
2640 | ||
5edd7e09 DG |
2641 | /* |
2642 | * Set default channel attributes. | |
441c16a7 | 2643 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2644 | */ |
2645 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2646 | struct lttng_channel_attr *attr) | |
2647 | { | |
294851b0 | 2648 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2649 | |
5edd7e09 DG |
2650 | /* Safety check */ |
2651 | if (attr == NULL || domain == NULL) { | |
2652 | return; | |
2653 | } | |
2654 | ||
294851b0 | 2655 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2656 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2657 | ||
0a9c6494 DG |
2658 | /* Same for all domains. */ |
2659 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2660 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2661 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2662 | ||
5edd7e09 DG |
2663 | switch (domain->type) { |
2664 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2665 | attr->switch_timer_interval = |
2666 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2667 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2668 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2669 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2670 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2671 | if (extended) { |
2672 | extended->monitor_timer_interval = | |
2673 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2674 | extended->blocking_timeout = |
2675 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2676 | } |
5edd7e09 DG |
2677 | break; |
2678 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2679 | switch (domain->buf_type) { |
2680 | case LTTNG_BUFFER_PER_UID: | |
2681 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2682 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2683 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2684 | attr->switch_timer_interval = |
2685 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2686 | attr->read_timer_interval = | |
2687 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2688 | if (extended) { |
2689 | extended->monitor_timer_interval = | |
2690 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2691 | extended->blocking_timeout = |
2692 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2693 | } |
0a9c6494 DG |
2694 | break; |
2695 | case LTTNG_BUFFER_PER_PID: | |
2696 | default: | |
2697 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2698 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2699 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2700 | attr->switch_timer_interval = |
2701 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2702 | attr->read_timer_interval = | |
2703 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2704 | if (extended) { |
2705 | extended->monitor_timer_interval = | |
2706 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2707 | extended->blocking_timeout = |
2708 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2709 | } |
0a9c6494 DG |
2710 | break; |
2711 | } | |
5edd7e09 | 2712 | default: |
441c16a7 | 2713 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2714 | break; |
2715 | } | |
cf0bcb51 JG |
2716 | |
2717 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2718 | } |
2719 | ||
5ba3702f JG |
2720 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2721 | uint64_t *discarded_events) | |
2722 | { | |
2723 | int ret = 0; | |
cf0bcb51 | 2724 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2725 | |
2726 | if (!channel || !discarded_events) { | |
2727 | ret = -LTTNG_ERR_INVALID; | |
2728 | goto end; | |
2729 | } | |
2730 | ||
2731 | chan_ext = channel->attr.extended.ptr; | |
2732 | if (!chan_ext) { | |
2733 | /* | |
2734 | * This can happen since the lttng_channel structure is | |
2735 | * used for other tasks where this pointer is never set. | |
2736 | */ | |
2737 | *discarded_events = 0; | |
2738 | goto end; | |
2739 | } | |
2740 | ||
2741 | *discarded_events = chan_ext->discarded_events; | |
2742 | end: | |
2743 | return ret; | |
2744 | } | |
2745 | ||
2746 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2747 | uint64_t *lost_packets) | |
2748 | { | |
2749 | int ret = 0; | |
cf0bcb51 | 2750 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2751 | |
2752 | if (!channel || !lost_packets) { | |
2753 | ret = -LTTNG_ERR_INVALID; | |
2754 | goto end; | |
2755 | } | |
2756 | ||
2757 | chan_ext = channel->attr.extended.ptr; | |
2758 | if (!chan_ext) { | |
2759 | /* | |
2760 | * This can happen since the lttng_channel structure is | |
2761 | * used for other tasks where this pointer is never set. | |
2762 | */ | |
2763 | *lost_packets = 0; | |
2764 | goto end; | |
2765 | } | |
2766 | ||
2767 | *lost_packets = chan_ext->lost_packets; | |
2768 | end: | |
2769 | return ret; | |
2770 | } | |
2771 | ||
cf0bcb51 JG |
2772 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2773 | uint64_t *monitor_timer_interval) | |
2774 | { | |
2775 | int ret = 0; | |
2776 | ||
2777 | if (!chan || !monitor_timer_interval) { | |
2778 | ret = -LTTNG_ERR_INVALID; | |
2779 | goto end; | |
2780 | } | |
2781 | ||
2782 | if (!chan->attr.extended.ptr) { | |
2783 | ret = -LTTNG_ERR_INVALID; | |
2784 | goto end; | |
2785 | } | |
2786 | ||
2787 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2788 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2789 | end: | |
2790 | return ret; | |
2791 | } | |
2792 | ||
2793 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2794 | uint64_t monitor_timer_interval) | |
2795 | { | |
2796 | int ret = 0; | |
2797 | ||
2798 | if (!chan || !chan->attr.extended.ptr) { | |
2799 | ret = -LTTNG_ERR_INVALID; | |
2800 | goto end; | |
2801 | } | |
2802 | ||
2803 | ((struct lttng_channel_extended *) | |
2804 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2805 | monitor_timer_interval; | |
2806 | end: | |
2807 | return ret; | |
2808 | } | |
2809 | ||
491d1539 MD |
2810 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2811 | int64_t *blocking_timeout) | |
2812 | { | |
2813 | int ret = 0; | |
2814 | ||
2815 | if (!chan || !blocking_timeout) { | |
2816 | ret = -LTTNG_ERR_INVALID; | |
2817 | goto end; | |
2818 | } | |
2819 | ||
2820 | if (!chan->attr.extended.ptr) { | |
2821 | ret = -LTTNG_ERR_INVALID; | |
2822 | goto end; | |
2823 | } | |
2824 | ||
2825 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2826 | chan->attr.extended.ptr)->blocking_timeout; | |
2827 | end: | |
2828 | return ret; | |
2829 | } | |
2830 | ||
2831 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2832 | int64_t blocking_timeout) | |
2833 | { | |
2834 | int ret = 0; | |
2835 | int64_t msec_timeout; | |
2836 | ||
2837 | if (!chan || !chan->attr.extended.ptr) { | |
2838 | ret = -LTTNG_ERR_INVALID; | |
2839 | goto end; | |
2840 | } | |
2841 | ||
2842 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2843 | ret = -LTTNG_ERR_INVALID; | |
2844 | goto end; | |
2845 | } | |
2846 | ||
2847 | /* | |
2848 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2849 | * us to accept a narrower range of values (msecs expressed as a signed | |
2850 | * 32-bit integer). | |
2851 | */ | |
2852 | msec_timeout = blocking_timeout / 1000; | |
2853 | if (msec_timeout != (int32_t) msec_timeout) { | |
2854 | ret = -LTTNG_ERR_INVALID; | |
2855 | goto end; | |
2856 | } | |
2857 | ||
2858 | ((struct lttng_channel_extended *) | |
2859 | chan->attr.extended.ptr)->blocking_timeout = | |
2860 | blocking_timeout; | |
2861 | end: | |
2862 | return ret; | |
2863 | } | |
2864 | ||
fac6795d | 2865 | /* |
2269e89e | 2866 | * Check if session daemon is alive. |
fac6795d | 2867 | * |
2269e89e | 2868 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2869 | * On error returns a negative value. |
fac6795d | 2870 | */ |
947308c4 | 2871 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2872 | { |
2873 | int ret; | |
2874 | ||
2875 | ret = set_session_daemon_path(); | |
2876 | if (ret < 0) { | |
9ae110e2 | 2877 | /* Error. */ |
fac6795d DG |
2878 | return ret; |
2879 | } | |
2880 | ||
9d035200 | 2881 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2882 | /* |
9ae110e2 JG |
2883 | * No socket path set. Weird error which means the constructor |
2884 | * was not called. | |
2f70b271 DG |
2885 | */ |
2886 | assert(0); | |
fac6795d DG |
2887 | } |
2888 | ||
2269e89e | 2889 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2890 | if (ret < 0) { |
9ae110e2 | 2891 | /* Not alive. */ |
7d8234d9 MD |
2892 | return 0; |
2893 | } | |
7d8234d9 | 2894 | |
9ae110e2 | 2895 | /* Is alive. */ |
947308c4 | 2896 | return 1; |
fac6795d DG |
2897 | } |
2898 | ||
00e2e675 | 2899 | /* |
a4b92340 | 2900 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2901 | * |
2902 | * Return 0 on success, else a negative value. | |
2903 | */ | |
a4b92340 DG |
2904 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2905 | const char *control_url, const char *data_url) | |
00e2e675 | 2906 | { |
3dd05a85 | 2907 | int ret; |
a4b92340 | 2908 | ssize_t size; |
00e2e675 | 2909 | struct lttcomm_session_msg lsm; |
a4b92340 | 2910 | struct lttng_uri *uris = NULL; |
00e2e675 | 2911 | |
a4b92340 | 2912 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
e1b624d0 JG |
2913 | ret = -LTTNG_ERR_INVALID; |
2914 | goto error; | |
00e2e675 DG |
2915 | } |
2916 | ||
a4b92340 DG |
2917 | memset(&lsm, 0, sizeof(lsm)); |
2918 | ||
00e2e675 DG |
2919 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2920 | ||
e1b624d0 | 2921 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 2922 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2923 | if (ret) { |
2924 | ret = -LTTNG_ERR_INVALID; | |
2925 | goto error; | |
2926 | } | |
2927 | ||
60160d2a | 2928 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2929 | |
bc894455 | 2930 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2931 | if (size < 0) { |
e1b624d0 JG |
2932 | ret = -LTTNG_ERR_INVALID; |
2933 | goto error; | |
a4b92340 DG |
2934 | } |
2935 | ||
2936 | lsm.u.uri.size = size; | |
00e2e675 | 2937 | |
795a978d | 2938 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2939 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2940 | |
2941 | free(uris); | |
e1b624d0 | 2942 | error: |
3dd05a85 | 2943 | return ret; |
00e2e675 DG |
2944 | } |
2945 | ||
2946 | /* | |
9c6bda17 | 2947 | * [OBSOLETE] |
00e2e675 | 2948 | */ |
2ec40111 | 2949 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2950 | int lttng_enable_consumer(struct lttng_handle *handle) |
2951 | { | |
785d2d0d | 2952 | return -ENOSYS; |
00e2e675 DG |
2953 | } |
2954 | ||
2955 | /* | |
9c6bda17 | 2956 | * [OBSOLETE] |
00e2e675 | 2957 | */ |
2ec40111 | 2958 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2959 | int lttng_disable_consumer(struct lttng_handle *handle) |
2960 | { | |
785d2d0d | 2961 | return -ENOSYS; |
00e2e675 DG |
2962 | } |
2963 | ||
07424f16 | 2964 | /* |
b178f53e | 2965 | * [OBSOLETE] |
07424f16 | 2966 | */ |
2ec40111 SM |
2967 | int _lttng_create_session_ext(const char *name, const char *url, |
2968 | const char *datetime); | |
07424f16 DG |
2969 | int _lttng_create_session_ext(const char *name, const char *url, |
2970 | const char *datetime) | |
2971 | { | |
b178f53e | 2972 | return -ENOSYS; |
07424f16 DG |
2973 | } |
2974 | ||
806e2684 DG |
2975 | /* |
2976 | * For a given session name, this call checks if the data is ready to be read | |
2977 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2978 | * any readers. | |
2979 | */ | |
6d805429 | 2980 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2981 | { |
2982 | int ret; | |
2983 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2984 | uint8_t *pending = NULL; |
806e2684 DG |
2985 | |
2986 | if (session_name == NULL) { | |
2987 | return -LTTNG_ERR_INVALID; | |
2988 | } | |
2989 | ||
53efb85a | 2990 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2991 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2992 | |
e1b624d0 | 2993 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2994 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2995 | if (ret) { |
2996 | ret = -LTTNG_ERR_INVALID; | |
2997 | goto end; | |
2998 | } | |
806e2684 | 2999 | |
f6151c55 JG |
3000 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
3001 | if (ret < 0) { | |
3002 | goto end; | |
3003 | } else if (ret != 1) { | |
3004 | /* Unexpected payload size */ | |
3005 | ret = -LTTNG_ERR_INVALID; | |
3006 | goto end; | |
e848d36d JG |
3007 | } else if (!pending) { |
3008 | /* Internal error. */ | |
3009 | ret = -LTTNG_ERR_UNK; | |
3010 | goto end; | |
806e2684 DG |
3011 | } |
3012 | ||
f6151c55 JG |
3013 | ret = (int) *pending; |
3014 | end: | |
3015 | free(pending); | |
806e2684 DG |
3016 | return ret; |
3017 | } | |
3018 | ||
93ec662e JD |
3019 | /* |
3020 | * Regenerate the metadata for a session. | |
3021 | * Return 0 on success, a negative error code on error. | |
3022 | */ | |
eded6438 | 3023 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
3024 | { |
3025 | int ret; | |
3026 | struct lttcomm_session_msg lsm; | |
3027 | ||
3028 | if (!session_name) { | |
3029 | ret = -LTTNG_ERR_INVALID; | |
3030 | goto end; | |
3031 | } | |
3032 | ||
3033 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 3034 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 3035 | |
e1b624d0 | 3036 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 3037 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3038 | if (ret) { |
3039 | ret = -LTTNG_ERR_INVALID; | |
3040 | goto end; | |
3041 | } | |
93ec662e JD |
3042 | |
3043 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3044 | if (ret < 0) { | |
3045 | goto end; | |
3046 | } | |
3047 | ||
3048 | ret = 0; | |
3049 | end: | |
3050 | return ret; | |
3051 | } | |
3052 | ||
eded6438 JD |
3053 | /* |
3054 | * Deprecated, replaced by lttng_regenerate_metadata. | |
3055 | */ | |
3056 | int lttng_metadata_regenerate(const char *session_name) | |
3057 | { | |
3058 | return lttng_regenerate_metadata(session_name); | |
3059 | } | |
3060 | ||
c2561365 JD |
3061 | /* |
3062 | * Regenerate the statedump of a session. | |
3063 | * Return 0 on success, a negative error code on error. | |
3064 | */ | |
3065 | int lttng_regenerate_statedump(const char *session_name) | |
3066 | { | |
3067 | int ret; | |
3068 | struct lttcomm_session_msg lsm; | |
3069 | ||
3070 | if (!session_name) { | |
3071 | ret = -LTTNG_ERR_INVALID; | |
3072 | goto end; | |
3073 | } | |
3074 | ||
3075 | memset(&lsm, 0, sizeof(lsm)); | |
3076 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
3077 | ||
e1b624d0 | 3078 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 3079 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3080 | if (ret) { |
3081 | ret = -LTTNG_ERR_INVALID; | |
3082 | goto end; | |
3083 | } | |
c2561365 JD |
3084 | |
3085 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3086 | if (ret < 0) { | |
3087 | goto end; | |
3088 | } | |
3089 | ||
3090 | ret = 0; | |
3091 | end: | |
3092 | return ret; | |
3093 | } | |
3094 | ||
a5c2d2a7 JG |
3095 | static |
3096 | int _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, | |
3097 | bool generate_name) | |
a58c490f JG |
3098 | { |
3099 | int ret; | |
99608320 JR |
3100 | struct lttcomm_session_msg lsm = { |
3101 | .cmd_type = LTTNG_REGISTER_TRIGGER, | |
a5c2d2a7 | 3102 | .u.trigger.is_trigger_anonymous = !name && !generate_name, |
99608320 JR |
3103 | }; |
3104 | struct lttcomm_session_msg *message_lsm; | |
3105 | struct lttng_payload message; | |
3106 | struct lttng_payload reply; | |
242388e4 | 3107 | struct lttng_trigger *reply_trigger = NULL; |
9124c630 | 3108 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
3109 | const struct lttng_credentials user_creds = { |
3110 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3111 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3112 | }; | |
a5c2d2a7 JG |
3113 | const char *unused_trigger_name = NULL; |
3114 | enum lttng_trigger_status trigger_status; | |
99608320 JR |
3115 | |
3116 | lttng_payload_init(&message); | |
3117 | lttng_payload_init(&reply); | |
a58c490f JG |
3118 | |
3119 | if (!trigger) { | |
3120 | ret = -LTTNG_ERR_INVALID; | |
3121 | goto end; | |
3122 | } | |
3123 | ||
a5c2d2a7 JG |
3124 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
3125 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
3126 | /* Re-using already registered trigger. */ | |
3127 | ret = -LTTNG_ERR_INVALID; | |
3128 | goto end; | |
3129 | } | |
3130 | ||
3131 | if (name) { | |
3132 | trigger_status = lttng_trigger_set_name(trigger, name); | |
3133 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3134 | ret = -LTTNG_ERR_NOMEM; | |
3135 | goto end; | |
3136 | } | |
3137 | } | |
3138 | ||
64eafdf6 JR |
3139 | if (!trigger->creds.uid.is_set) { |
3140 | /* Use the client's credentials as the trigger credentials. */ | |
3141 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3142 | } else { | |
3143 | /* | |
3144 | * Validate that either the current trigger credentials and the | |
3145 | * client credentials are identical or that the current user is | |
3146 | * root. The root user can register, unregister triggers for | |
3147 | * himself and other users. | |
3148 | * | |
3149 | * This check is also present on the sessiond side, using the | |
3150 | * credentials passed on the socket. These check are all | |
3151 | * "safety" checks. | |
3152 | */ | |
3153 | const struct lttng_credentials *trigger_creds = | |
3154 | lttng_trigger_get_credentials(trigger); | |
3155 | ||
3156 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3157 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3158 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 3159 | goto end_unset_name; |
64eafdf6 JR |
3160 | } |
3161 | } | |
3162 | } | |
3163 | ||
a58c490f | 3164 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3165 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 3166 | goto end_unset_name; |
a58c490f JG |
3167 | } |
3168 | ||
9124c630 JR |
3169 | domain_type = lttng_trigger_get_underlying_domain_type_restriction( |
3170 | trigger); | |
3171 | ||
3172 | lsm.domain.type = domain_type; | |
3173 | ||
97285430 JG |
3174 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3175 | if (ret) { | |
3176 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 3177 | goto end_unset_name; |
97285430 | 3178 | } |
99608320 | 3179 | |
99608320 | 3180 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3181 | if (ret < 0) { |
a58c490f | 3182 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3183 | goto end_unset_name; |
a58c490f JG |
3184 | } |
3185 | ||
b22f4f54 JG |
3186 | /* |
3187 | * This is needed to populate the trigger object size for the command | |
3188 | * header. | |
3189 | */ | |
3190 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3191 | ||
99608320 JR |
3192 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3193 | ||
3194 | { | |
3195 | struct lttng_payload_view message_view = | |
3196 | lttng_payload_view_from_payload( | |
3197 | &message, 0, -1); | |
3198 | ||
3199 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3200 | &message_view); | |
3201 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3202 | if (ret < 0) { | |
a5c2d2a7 | 3203 | goto end_unset_name; |
99608320 JR |
3204 | } |
3205 | } | |
3206 | ||
242388e4 JR |
3207 | { |
3208 | struct lttng_payload_view reply_view = | |
3209 | lttng_payload_view_from_payload( | |
3210 | &reply, 0, reply.buffer.size); | |
3211 | ||
3212 | ret = lttng_trigger_create_from_payload( | |
3213 | &reply_view, &reply_trigger); | |
3214 | if (ret < 0) { | |
a5c2d2a7 JG |
3215 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3216 | goto end_unset_name; | |
242388e4 JR |
3217 | } |
3218 | } | |
3219 | ||
a5c2d2a7 JG |
3220 | if (name || generate_name) { |
3221 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3222 | if (ret < 0) { | |
3223 | ret = -LTTNG_ERR_NOMEM; | |
3224 | goto end; | |
3225 | } | |
242388e4 JR |
3226 | } |
3227 | ||
99608320 | 3228 | ret = 0; |
a5c2d2a7 JG |
3229 | goto end; |
3230 | ||
3231 | end_unset_name: | |
3232 | trigger_status = lttng_trigger_set_name(trigger, NULL); | |
3233 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3234 | ret = -LTTNG_ERR_UNK; | |
3235 | } | |
a58c490f | 3236 | end: |
99608320 JR |
3237 | lttng_payload_reset(&message); |
3238 | lttng_payload_reset(&reply); | |
242388e4 | 3239 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3240 | return ret; |
3241 | } | |
3242 | ||
a5c2d2a7 JG |
3243 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3244 | { | |
3245 | /* Register an anonymous trigger. */ | |
3246 | return _lttng_register_trigger(trigger, NULL, false); | |
3247 | } | |
3248 | ||
3249 | enum lttng_error_code lttng_register_trigger_with_name( | |
3250 | struct lttng_trigger *trigger, const char *name) | |
3251 | { | |
3252 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3253 | ||
3254 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3255 | } | |
3256 | ||
3257 | enum lttng_error_code lttng_register_trigger_with_automatic_name( | |
3258 | struct lttng_trigger *trigger) | |
3259 | { | |
3260 | const int ret = _lttng_register_trigger(trigger, false, true); | |
3261 | ||
3262 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3263 | } | |
3264 | ||
b99a0cb3 JG |
3265 | enum lttng_error_code lttng_error_query_execute( |
3266 | const struct lttng_error_query *query, | |
3267 | const struct lttng_endpoint *endpoint, | |
3268 | struct lttng_error_query_results **results) | |
3269 | { | |
3270 | int ret; | |
3271 | enum lttng_error_code ret_code; | |
3272 | struct lttcomm_session_msg lsm = { | |
3273 | .cmd_type = LTTNG_EXECUTE_ERROR_QUERY, | |
3274 | }; | |
3275 | struct lttng_payload message; | |
3276 | struct lttng_payload reply; | |
3277 | struct lttcomm_session_msg *message_lsm; | |
3278 | ||
3279 | lttng_payload_init(&message); | |
3280 | lttng_payload_init(&reply); | |
3281 | ||
3282 | if (!query || !results) { | |
3283 | ret_code = LTTNG_ERR_INVALID; | |
3284 | goto end; | |
3285 | } | |
3286 | ||
3287 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3288 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3289 | goto end; | |
3290 | } | |
3291 | ||
3292 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3293 | if (ret) { | |
3294 | ret_code = LTTNG_ERR_NOMEM; | |
3295 | goto end; | |
3296 | } | |
3297 | ||
3298 | ret = lttng_error_query_serialize(query, &message); | |
3299 | if (ret) { | |
3300 | ret_code = LTTNG_ERR_UNK; | |
3301 | goto end; | |
3302 | } | |
3303 | ||
3304 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3305 | message_lsm->u.error_query.length = | |
3306 | (uint32_t) message.buffer.size - sizeof(lsm); | |
3307 | ||
3308 | { | |
3309 | struct lttng_payload_view message_view = | |
3310 | lttng_payload_view_from_payload( | |
3311 | &message, 0, -1); | |
3312 | ||
3313 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3314 | &message_view); | |
3315 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3316 | if (ret < 0) { | |
3317 | ret_code = -ret; | |
3318 | goto end; | |
3319 | } | |
3320 | } | |
3321 | ||
3322 | { | |
3323 | ssize_t reply_create_ret; | |
3324 | struct lttng_payload_view reply_view = | |
3325 | lttng_payload_view_from_payload( | |
3326 | &reply, 0, reply.buffer.size); | |
3327 | ||
3328 | reply_create_ret = lttng_error_query_results_create_from_payload( | |
3329 | &reply_view, results); | |
3330 | if (reply_create_ret < 0) { | |
3331 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3332 | goto end; | |
3333 | } | |
3334 | } | |
3335 | ||
3336 | ret_code = LTTNG_OK; | |
3337 | end: | |
3338 | lttng_payload_reset(&message); | |
3339 | lttng_payload_reset(&reply); | |
3340 | return ret_code; | |
3341 | } | |
3342 | ||
b61776fb | 3343 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3344 | { |
3345 | int ret; | |
3346 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3347 | struct lttcomm_session_msg *message_lsm; |
3348 | struct lttng_payload message; | |
3349 | struct lttng_payload reply; | |
b61776fb | 3350 | struct lttng_trigger *copy = NULL; |
64eafdf6 JR |
3351 | const struct lttng_credentials user_creds = { |
3352 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3353 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3354 | }; | |
99608320 JR |
3355 | |
3356 | lttng_payload_init(&message); | |
3357 | lttng_payload_init(&reply); | |
a58c490f JG |
3358 | |
3359 | if (!trigger) { | |
3360 | ret = -LTTNG_ERR_INVALID; | |
3361 | goto end; | |
3362 | } | |
3363 | ||
b61776fb SM |
3364 | copy = lttng_trigger_copy(trigger); |
3365 | if (!copy) { | |
3366 | ret = -LTTNG_ERR_UNK; | |
3367 | goto end; | |
3368 | } | |
3369 | ||
3370 | if (!copy->creds.uid.is_set) { | |
3371 | /* Use the client credentials as the trigger credentials */ | |
3372 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3373 | } else { |
3374 | /* | |
3375 | * Validate that either the current trigger credentials and the | |
3376 | * client credentials are identical or that the current user is | |
3377 | * root. The root user can register, unregister triggers for | |
3378 | * himself and other users. | |
3379 | * | |
3380 | * This check is also present on the sessiond side, using the | |
3381 | * credentials passed on the socket. These check are all | |
3382 | * "safety" checks. | |
3383 | */ | |
3384 | const struct lttng_credentials *trigger_creds = | |
b61776fb | 3385 | lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3386 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3387 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3388 | ret = -LTTNG_ERR_EPERM; | |
3389 | goto end; | |
3390 | } | |
3391 | } | |
3392 | } | |
3393 | ||
b61776fb | 3394 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3395 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3396 | goto end; |
3397 | } | |
3398 | ||
99608320 JR |
3399 | memset(&lsm, 0, sizeof(lsm)); |
3400 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3401 | ||
97285430 JG |
3402 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3403 | if (ret) { | |
3404 | ret = -LTTNG_ERR_NOMEM; | |
3405 | goto end; | |
3406 | } | |
99608320 | 3407 | |
b61776fb | 3408 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3409 | if (ret < 0) { |
a58c490f JG |
3410 | ret = -LTTNG_ERR_UNK; |
3411 | goto end; | |
3412 | } | |
3413 | ||
b0a79813 FD |
3414 | /* |
3415 | * This is needed to populate the trigger object size for the command | |
3416 | * header and number of fds sent. | |
3417 | */ | |
3418 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3419 | ||
99608320 JR |
3420 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3421 | ||
3422 | { | |
3423 | struct lttng_payload_view message_view = | |
3424 | lttng_payload_view_from_payload( | |
3425 | &message, 0, -1); | |
3426 | ||
3427 | /* | |
3428 | * Update the message header with the number of fd that will be | |
3429 | * sent. | |
3430 | */ | |
3431 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3432 | &message_view); | |
3433 | ||
3434 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3435 | if (ret < 0) { | |
3436 | goto end; | |
3437 | } | |
3438 | } | |
3439 | ||
3440 | ret = 0; | |
a58c490f | 3441 | end: |
b61776fb | 3442 | lttng_trigger_destroy(copy); |
99608320 JR |
3443 | lttng_payload_reset(&message); |
3444 | lttng_payload_reset(&reply); | |
a58c490f JG |
3445 | return ret; |
3446 | } | |
3447 | ||
fbc9f37d JR |
3448 | /* |
3449 | * Ask the session daemon for all registered triggers for the current user. | |
3450 | * | |
3451 | * Allocates and return an lttng_triggers set. | |
3452 | * On error, returns a suitable lttng_error_code. | |
3453 | */ | |
3454 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3455 | { | |
3456 | int ret; | |
3457 | enum lttng_error_code ret_code = LTTNG_OK; | |
3458 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS }; | |
3459 | struct lttng_triggers *local_triggers = NULL; | |
3460 | struct lttng_payload reply; | |
3461 | struct lttng_payload_view lsm_view = | |
3462 | lttng_payload_view_init_from_buffer( | |
3463 | (const char *) &lsm, 0, sizeof(lsm)); | |
3464 | ||
3465 | lttng_payload_init(&reply); | |
3466 | ||
3467 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3468 | if (ret < 0) { | |
3469 | ret_code = (enum lttng_error_code) -ret; | |
3470 | goto end; | |
3471 | } | |
3472 | ||
3473 | { | |
3474 | struct lttng_payload_view reply_view = | |
3475 | lttng_payload_view_from_payload( | |
3476 | &reply, 0, reply.buffer.size); | |
3477 | ||
3478 | ret = lttng_triggers_create_from_payload( | |
3479 | &reply_view, &local_triggers); | |
3480 | if (ret < 0) { | |
3481 | ret_code = LTTNG_ERR_FATAL; | |
3482 | goto end; | |
3483 | } | |
3484 | } | |
3485 | ||
3486 | *triggers = local_triggers; | |
3487 | local_triggers = NULL; | |
3488 | end: | |
3489 | lttng_payload_reset(&reply); | |
3490 | lttng_triggers_destroy(local_triggers); | |
3491 | return ret_code; | |
3492 | } | |
3493 | ||
fac6795d | 3494 | /* |
9ae110e2 | 3495 | * lib constructor. |
fac6795d | 3496 | */ |
b2b89e8a | 3497 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3498 | { |
3499 | /* Set default session group */ | |
bbccc3d2 | 3500 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3501 | } |
49cca668 DG |
3502 | |
3503 | /* | |
9ae110e2 | 3504 | * lib destructor. |
49cca668 | 3505 | */ |
b2b89e8a | 3506 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3507 | { |
3508 | free(tracing_group); | |
3509 | } |