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