Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
90c106c6 | 6 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa | 7 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
ab5be9fa | 9 | * SPDX-License-Identifier: LGPL-2.1-only |
82a3637f | 10 | * |
fac6795d DG |
11 | */ |
12 | ||
6c1c0768 | 13 | #define _LGPL_SOURCE |
44a5e5eb | 14 | #include <assert.h> |
fac6795d DG |
15 | #include <grp.h> |
16 | #include <stdio.h> | |
17 | #include <stdlib.h> | |
d72eb77f | 18 | #include <stdint.h> |
fac6795d DG |
19 | #include <string.h> |
20 | #include <unistd.h> | |
21 | ||
0ae3cfc6 | 22 | #include <common/bytecode/bytecode.h> |
990570ed | 23 | #include <common/common.h> |
edf4b93e | 24 | #include <common/compat/errno.h> |
15e37663 | 25 | #include <common/compat/string.h> |
990570ed | 26 | #include <common/defaults.h> |
fe489250 | 27 | #include <common/dynamic-array.h> |
b99a0cb3 | 28 | #include <common/dynamic-buffer.h> |
9e620ea7 | 29 | #include <common/payload-view.h> |
b99a0cb3 | 30 | #include <common/payload.h> |
db758600 | 31 | #include <common/sessiond-comm/sessiond-comm.h> |
159b042f | 32 | #include <common/tracker.h> |
fe489250 | 33 | #include <common/unix.h> |
a4b92340 | 34 | #include <common/uri.h> |
feb0f3e5 | 35 | #include <common/utils.h> |
a58c490f | 36 | #include <lttng/channel-internal.h> |
159b042f JG |
37 | #include <lttng/destruction-handle.h> |
38 | #include <lttng/endpoint.h> | |
b99a0cb3 | 39 | #include <lttng/error-query-internal.h> |
de453daa | 40 | #include <lttng/event-internal.h> |
159b042f | 41 | #include <lttng/health-internal.h> |
b99a0cb3 | 42 | #include <lttng/lttng-error.h> |
159b042f | 43 | #include <lttng/lttng.h> |
b178f53e | 44 | #include <lttng/session-descriptor-internal.h> |
159b042f JG |
45 | #include <lttng/session-internal.h> |
46 | #include <lttng/trigger/trigger-internal.h> | |
47 | #include <lttng/userspace-probe-internal.h> | |
fac6795d | 48 | |
b99a0cb3 | 49 | #include "lttng-ctl-helper.h" |
e4d2f27a JR |
50 | #include <common/filter/filter-ast.h> |
51 | #include <common/filter/filter-parser.h> | |
e4d2f27a | 52 | #include <common/filter/memstream.h> |
53a80697 | 53 | |
60160d2a JG |
54 | #define COPY_DOMAIN_PACKED(dst, src) \ |
55 | do { \ | |
56 | struct lttng_domain _tmp_domain; \ | |
57 | \ | |
58 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
59 | dst = _tmp_domain; \ | |
60 | } while (0) | |
53a80697 | 61 | |
fac6795d | 62 | /* Socket to session daemon for communication */ |
3e3665b8 | 63 | static int sessiond_socket = -1; |
fac6795d DG |
64 | static char sessiond_sock_path[PATH_MAX]; |
65 | ||
fac6795d DG |
66 | /* Variables */ |
67 | static char *tracing_group; | |
68 | static int connected; | |
69 | ||
97e19046 DG |
70 | /* Global */ |
71 | ||
72 | /* | |
73 | * Those two variables are used by error.h to silent or control the verbosity of | |
74 | * error message. They are global to the library so application linking with it | |
75 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
76 | */ |
77 | int lttng_opt_quiet; | |
78 | int lttng_opt_verbose; | |
c7e35b03 | 79 | int lttng_opt_mi; |
97e19046 | 80 | |
fac6795d | 81 | /* |
cd80958d | 82 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 83 | * |
cd80958d DG |
84 | * If domain is unknown, default domain will be the kernel. |
85 | */ | |
cac3069d DG |
86 | LTTNG_HIDDEN |
87 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
88 | struct lttng_domain *src) | |
cd80958d DG |
89 | { |
90 | if (src && dst) { | |
91 | switch (src->type) { | |
00e2e675 DG |
92 | case LTTNG_DOMAIN_KERNEL: |
93 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 94 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 95 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 96 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
97 | memcpy(dst, src, sizeof(struct lttng_domain)); |
98 | break; | |
99 | default: | |
100 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 101 | break; |
cd80958d DG |
102 | } |
103 | } | |
104 | } | |
105 | ||
106 | /* | |
107 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 108 | * |
1c8d13c8 TD |
109 | * On success, returns the number of bytes sent (>=0) |
110 | * On error, returns -1 | |
fac6795d | 111 | */ |
cd80958d | 112 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
113 | { |
114 | int ret; | |
115 | ||
116 | if (!connected) { | |
2f70b271 | 117 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 118 | goto end; |
fac6795d DG |
119 | } |
120 | ||
19f912db FD |
121 | DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str(lsm->cmd_type), |
122 | lsm->cmd_type); | |
a4b92340 | 123 | |
be040666 | 124 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 125 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
126 | if (ret < 0) { |
127 | ret = -LTTNG_ERR_FATAL; | |
128 | } | |
e065084a DG |
129 | |
130 | end: | |
131 | return ret; | |
132 | } | |
133 | ||
53a80697 MD |
134 | /* |
135 | * Send var len data to the session daemon. | |
136 | * | |
137 | * On success, returns the number of bytes sent (>=0) | |
138 | * On error, returns -1 | |
139 | */ | |
c2d69327 | 140 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
141 | { |
142 | int ret; | |
143 | ||
144 | if (!connected) { | |
2f70b271 | 145 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
146 | goto end; |
147 | } | |
a4b92340 | 148 | |
53a80697 MD |
149 | if (!data || !len) { |
150 | ret = 0; | |
151 | goto end; | |
152 | } | |
153 | ||
154 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
155 | if (ret < 0) { |
156 | ret = -LTTNG_ERR_FATAL; | |
157 | } | |
53a80697 MD |
158 | |
159 | end: | |
160 | return ret; | |
161 | } | |
162 | ||
a04d53fc FD |
163 | /* |
164 | * Send file descriptors to the session daemon. | |
165 | * | |
166 | * On success, returns the number of bytes sent (>=0) | |
167 | * On error, returns -1 | |
168 | */ | |
169 | static int send_session_fds(const int *fds, size_t nb_fd) | |
170 | { | |
171 | int ret; | |
172 | ||
173 | if (!connected) { | |
174 | ret = -LTTNG_ERR_NO_SESSIOND; | |
175 | goto end; | |
176 | } | |
177 | ||
178 | if (!fds || !nb_fd) { | |
179 | ret = 0; | |
180 | goto end; | |
181 | } | |
182 | ||
183 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
184 | if (ret < 0) { | |
185 | ret = -LTTNG_ERR_FATAL; | |
186 | } | |
187 | ||
188 | end: | |
189 | return ret; | |
190 | } | |
191 | ||
e065084a | 192 | /* |
cd80958d | 193 | * Receive data from the sessiond socket. |
e065084a | 194 | * |
1c8d13c8 | 195 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 196 | * On error, returns a negative lttng_error_code. |
e065084a | 197 | */ |
ca95a216 | 198 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
199 | { |
200 | int ret; | |
201 | ||
bacc41cc FD |
202 | assert(len > 0); |
203 | ||
e065084a | 204 | if (!connected) { |
2f70b271 | 205 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 206 | goto end; |
fac6795d DG |
207 | } |
208 | ||
ca95a216 | 209 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
210 | if (ret < 0) { |
211 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
212 | } else if (ret == 0) { |
213 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 214 | } |
fac6795d | 215 | |
e065084a | 216 | end: |
fac6795d DG |
217 | return ret; |
218 | } | |
219 | ||
e368fb43 JG |
220 | /* |
221 | * Receive a payload from the session daemon by appending to an existing | |
222 | * payload. | |
223 | * On success, returns the number of bytes received (>=0) | |
224 | * On error, returns a negative lttng_error_code. | |
225 | */ | |
226 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
227 | { | |
228 | int ret; | |
229 | const size_t original_payload_size = payload->buffer.size; | |
230 | ||
231 | ret = lttng_dynamic_buffer_set_size( | |
232 | &payload->buffer, payload->buffer.size + len); | |
233 | if (ret) { | |
234 | ret = -LTTNG_ERR_NOMEM; | |
235 | goto end; | |
236 | } | |
237 | ||
238 | ret = recv_data_sessiond( | |
239 | payload->buffer.data + original_payload_size, len); | |
240 | end: | |
241 | return ret; | |
242 | } | |
243 | ||
fac6795d | 244 | /* |
9ae110e2 | 245 | * Check if we are in the specified group. |
65beb5ff | 246 | * |
9ae110e2 | 247 | * If yes return 1, else return -1. |
947308c4 | 248 | */ |
6c71277b MD |
249 | LTTNG_HIDDEN |
250 | int lttng_check_tracing_group(void) | |
947308c4 | 251 | { |
28ab59d0 | 252 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
253 | int grp_list_size, grp_id, i; |
254 | int ret = -1; | |
6c71277b | 255 | const char *grp_name = tracing_group; |
947308c4 DG |
256 | |
257 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 258 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 259 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
260 | goto end; |
261 | } | |
262 | ||
263 | /* Get number of supplementary group IDs */ | |
264 | grp_list_size = getgroups(0, NULL); | |
265 | if (grp_list_size < 0) { | |
6f04ed72 | 266 | PERROR("getgroups"); |
947308c4 DG |
267 | goto end; |
268 | } | |
269 | ||
270 | /* Alloc group list of the right size */ | |
3f451dc0 | 271 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 272 | if (!grp_list) { |
6f04ed72 | 273 | PERROR("malloc"); |
00795392 MD |
274 | goto end; |
275 | } | |
947308c4 | 276 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 277 | if (grp_id < 0) { |
6f04ed72 | 278 | PERROR("getgroups"); |
947308c4 DG |
279 | goto free_list; |
280 | } | |
281 | ||
282 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 283 | if (grp_list[i] == tracing_gid) { |
2269e89e | 284 | ret = 1; |
947308c4 DG |
285 | break; |
286 | } | |
287 | } | |
288 | ||
289 | free_list: | |
290 | free(grp_list); | |
291 | ||
292 | end: | |
293 | return ret; | |
294 | } | |
295 | ||
d72eb77f JR |
296 | static enum lttng_error_code check_enough_available_memory( |
297 | uint64_t num_bytes_requested_per_cpu) | |
09b72f7a FD |
298 | { |
299 | int ret; | |
d72eb77f | 300 | enum lttng_error_code ret_code; |
09b72f7a | 301 | long num_cpu; |
d72eb77f JR |
302 | uint64_t best_mem_info; |
303 | uint64_t num_bytes_requested_total; | |
09b72f7a FD |
304 | |
305 | /* | |
306 | * Get the number of CPU currently online to compute the amount of | |
307 | * memory needed to create a buffer for every CPU. | |
308 | */ | |
309 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
310 | if (num_cpu == -1) { | |
d72eb77f JR |
311 | ret_code = LTTNG_ERR_FATAL; |
312 | goto end; | |
313 | } | |
314 | ||
315 | if (num_bytes_requested_per_cpu > UINT64_MAX / (uint64_t) num_cpu) { | |
316 | /* Overflow */ | |
317 | ret_code = LTTNG_ERR_OVERFLOW; | |
318 | goto end; | |
09b72f7a FD |
319 | } |
320 | ||
d72eb77f JR |
321 | num_bytes_requested_total = |
322 | num_bytes_requested_per_cpu * (uint64_t) num_cpu; | |
09b72f7a FD |
323 | |
324 | /* | |
325 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
326 | * reliable estimate we can get but it is only exposed by the kernel | |
327 | * since 3.14. (See Linux kernel commit: | |
328 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
329 | */ | |
330 | ret = utils_get_memory_available(&best_mem_info); | |
331 | if (ret >= 0) { | |
332 | goto success; | |
333 | } | |
334 | ||
335 | /* | |
336 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
337 | * is a sanity check for obvious user error. | |
338 | */ | |
339 | ret = utils_get_memory_total(&best_mem_info); | |
340 | if (ret >= 0) { | |
341 | goto success; | |
342 | } | |
343 | ||
d72eb77f JR |
344 | /* No valid source of information. */ |
345 | ret_code = LTTNG_ERR_NOMEM; | |
346 | goto end; | |
347 | ||
09b72f7a | 348 | success: |
d72eb77f JR |
349 | if (best_mem_info >= num_bytes_requested_total) { |
350 | ret_code = LTTNG_OK; | |
351 | } else { | |
352 | ret_code = LTTNG_ERR_NOMEM; | |
353 | } | |
354 | end: | |
355 | return ret_code; | |
09b72f7a FD |
356 | } |
357 | ||
947308c4 | 358 | /* |
2269e89e DG |
359 | * Try connect to session daemon with sock_path. |
360 | * | |
361 | * Return 0 on success, else -1 | |
362 | */ | |
363 | static int try_connect_sessiond(const char *sock_path) | |
364 | { | |
365 | int ret; | |
366 | ||
367 | /* If socket exist, we check if the daemon listens for connect. */ | |
368 | ret = access(sock_path, F_OK); | |
369 | if (ret < 0) { | |
370 | /* Not alive */ | |
2f70b271 | 371 | goto error; |
2269e89e DG |
372 | } |
373 | ||
374 | ret = lttcomm_connect_unix_sock(sock_path); | |
375 | if (ret < 0) { | |
9ae110e2 | 376 | /* Not alive. */ |
2f70b271 | 377 | goto error; |
2269e89e DG |
378 | } |
379 | ||
380 | ret = lttcomm_close_unix_sock(ret); | |
381 | if (ret < 0) { | |
6f04ed72 | 382 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
383 | } |
384 | ||
385 | return 0; | |
2f70b271 DG |
386 | |
387 | error: | |
388 | return -1; | |
2269e89e DG |
389 | } |
390 | ||
391 | /* | |
2f70b271 DG |
392 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
393 | * variable. | |
394 | * | |
395 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
396 | * is somehow too long or ENOMEM). | |
947308c4 DG |
397 | */ |
398 | static int set_session_daemon_path(void) | |
399 | { | |
9ae110e2 | 400 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
401 | uid_t uid; |
402 | ||
403 | uid = getuid(); | |
947308c4 | 404 | |
2269e89e DG |
405 | if (uid != 0) { |
406 | /* Are we in the tracing group ? */ | |
6c71277b | 407 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
408 | } |
409 | ||
adca10ef | 410 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 JG |
411 | const int ret = lttng_strncpy(sessiond_sock_path, |
412 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
413 | sizeof(sessiond_sock_path)); | |
414 | ||
415 | if (ret) { | |
416 | goto error; | |
417 | } | |
08a9c49f | 418 | } |
2269e89e | 419 | |
08a9c49f | 420 | if (uid != 0) { |
c617c0c6 MD |
421 | int ret; |
422 | ||
08a9c49f | 423 | if (in_tgroup) { |
9ae110e2 | 424 | /* Tracing group. */ |
08a9c49f TD |
425 | ret = try_connect_sessiond(sessiond_sock_path); |
426 | if (ret >= 0) { | |
427 | goto end; | |
2269e89e | 428 | } |
08a9c49f | 429 | /* Global session daemon not available... */ |
2269e89e | 430 | } |
08a9c49f TD |
431 | /* ...or not in tracing group (and not root), default */ |
432 | ||
433 | /* | |
9ae110e2 JG |
434 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
435 | * is too small; | |
436 | * With GNU C >= 2.1, snprintf returns the required size | |
437 | * (excluding closing null) | |
08a9c49f TD |
438 | */ |
439 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 440 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 441 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 442 | goto error; |
947308c4 | 443 | } |
947308c4 | 444 | } |
08a9c49f | 445 | end: |
947308c4 | 446 | return 0; |
2f70b271 DG |
447 | |
448 | error: | |
449 | return -1; | |
947308c4 DG |
450 | } |
451 | ||
65beb5ff | 452 | /* |
9ae110e2 | 453 | * Connect to the LTTng session daemon. |
65beb5ff | 454 | * |
3e3665b8 | 455 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 456 | */ |
3e3665b8 | 457 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
458 | { |
459 | int ret; | |
460 | ||
461 | ret = set_session_daemon_path(); | |
462 | if (ret < 0) { | |
2f70b271 | 463 | goto error; |
65beb5ff DG |
464 | } |
465 | ||
9ae110e2 | 466 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
467 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
468 | if (ret < 0) { | |
2f70b271 | 469 | goto error; |
65beb5ff DG |
470 | } |
471 | ||
3e3665b8 | 472 | return ret; |
2f70b271 DG |
473 | |
474 | error: | |
475 | return -1; | |
65beb5ff DG |
476 | } |
477 | ||
3e3665b8 JG |
478 | static void reset_global_sessiond_connection_state(void) |
479 | { | |
480 | sessiond_socket = -1; | |
481 | connected = 0; | |
482 | } | |
483 | ||
65beb5ff | 484 | /* |
1c8d13c8 | 485 | * Clean disconnect from the session daemon. |
9ae110e2 | 486 | * |
1c8d13c8 | 487 | * On success, return 0. On error, return -1. |
65beb5ff DG |
488 | */ |
489 | static int disconnect_sessiond(void) | |
490 | { | |
491 | int ret = 0; | |
492 | ||
493 | if (connected) { | |
494 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 495 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
496 | } |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
795a978d PP |
501 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
502 | size_t *user_len) | |
503 | { | |
504 | int ret = 0; | |
505 | void *buf = NULL; | |
506 | ||
507 | if (len) { | |
508 | if (!user_len) { | |
509 | ret = -LTTNG_ERR_INVALID; | |
510 | goto end; | |
511 | } | |
512 | ||
513 | buf = zmalloc(len); | |
514 | if (!buf) { | |
515 | ret = -ENOMEM; | |
516 | goto end; | |
517 | } | |
518 | ||
519 | ret = recv_data_sessiond(buf, len); | |
520 | if (ret < 0) { | |
521 | goto end; | |
522 | } | |
523 | ||
524 | if (!user_buf) { | |
525 | ret = -LTTNG_ERR_INVALID; | |
526 | goto end; | |
527 | } | |
528 | ||
529 | /* Move ownership of command header buffer to user. */ | |
530 | *user_buf = buf; | |
531 | buf = NULL; | |
532 | *user_len = len; | |
533 | } else { | |
534 | /* No command header. */ | |
535 | if (user_len) { | |
536 | *user_len = 0; | |
537 | } | |
538 | ||
539 | if (user_buf) { | |
540 | *user_buf = NULL; | |
541 | } | |
542 | } | |
543 | ||
544 | end: | |
545 | free(buf); | |
546 | return ret; | |
547 | } | |
548 | ||
35a6fdb7 | 549 | /* |
cd80958d | 550 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
551 | * Takes extra var. len. data and file descriptors as input to send to the |
552 | * session daemon. | |
65beb5ff | 553 | * |
af87c45a | 554 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 555 | */ |
cac3069d | 556 | LTTNG_HIDDEN |
a04d53fc FD |
557 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
558 | const int *fds, size_t nb_fd, const void *vardata, | |
559 | size_t vardata_len, void **user_payload_buf, | |
560 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
561 | { |
562 | int ret; | |
795a978d | 563 | size_t payload_len; |
cd80958d | 564 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
565 | |
566 | ret = connect_sessiond(); | |
567 | if (ret < 0) { | |
2f70b271 | 568 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 569 | goto end; |
3e3665b8 JG |
570 | } else { |
571 | sessiond_socket = ret; | |
572 | connected = 1; | |
65beb5ff DG |
573 | } |
574 | ||
cd80958d | 575 | ret = send_session_msg(lsm); |
65beb5ff | 576 | if (ret < 0) { |
2f70b271 | 577 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
578 | goto end; |
579 | } | |
53a80697 | 580 | /* Send var len data */ |
795a978d | 581 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 582 | if (ret < 0) { |
2f70b271 | 583 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
584 | goto end; |
585 | } | |
65beb5ff | 586 | |
a04d53fc FD |
587 | /* Send fds */ |
588 | ret = send_session_fds(fds, nb_fd); | |
589 | if (ret < 0) { | |
590 | /* Ret value is a valid lttng error code. */ | |
591 | goto end; | |
592 | } | |
593 | ||
65beb5ff DG |
594 | /* Get header from data transmission */ |
595 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
596 | if (ret < 0) { | |
2f70b271 | 597 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
598 | goto end; |
599 | } | |
600 | ||
601 | /* Check error code if OK */ | |
f73fabfd | 602 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
603 | ret = -llm.ret_code; |
604 | goto end; | |
605 | } | |
606 | ||
795a978d PP |
607 | /* Get command header from data transmission */ |
608 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
609 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 610 | if (ret < 0) { |
65beb5ff DG |
611 | goto end; |
612 | } | |
613 | ||
795a978d PP |
614 | /* Get payload from data transmission */ |
615 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
616 | &payload_len); | |
617 | if (ret < 0) { | |
83009e5e DG |
618 | goto end; |
619 | } | |
620 | ||
795a978d | 621 | ret = llm.data_size; |
65beb5ff DG |
622 | |
623 | end: | |
624 | disconnect_sessiond(); | |
625 | return ret; | |
626 | } | |
627 | ||
e368fb43 JG |
628 | LTTNG_HIDDEN |
629 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, | |
630 | struct lttng_payload *reply) | |
631 | { | |
632 | int ret; | |
633 | struct lttcomm_lttng_msg llm; | |
fe489250 | 634 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 JG |
635 | |
636 | assert(reply->buffer.size == 0); | |
fe489250 | 637 | assert(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); |
e368fb43 JG |
638 | |
639 | ret = connect_sessiond(); | |
640 | if (ret < 0) { | |
641 | ret = -LTTNG_ERR_NO_SESSIOND; | |
642 | goto end; | |
643 | } else { | |
644 | sessiond_socket = ret; | |
645 | connected = 1; | |
646 | } | |
647 | ||
648 | /* Send command to session daemon */ | |
649 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data, | |
650 | message->buffer.size); | |
651 | if (ret < 0) { | |
652 | ret = -LTTNG_ERR_FATAL; | |
653 | goto end; | |
654 | } | |
655 | ||
fe489250 JG |
656 | if (fd_count > 0) { |
657 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, | |
658 | message); | |
659 | if (ret < 0) { | |
660 | ret = -LTTNG_ERR_FATAL; | |
661 | goto end; | |
662 | } | |
e368fb43 JG |
663 | } |
664 | ||
665 | /* Get header from data transmission */ | |
666 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
667 | if (ret < 0) { | |
668 | /* Ret value is a valid lttng error code. */ | |
669 | goto end; | |
670 | } | |
671 | ||
672 | llm = *((typeof(llm) *) reply->buffer.data); | |
673 | ||
674 | /* Check error code if OK */ | |
675 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
676 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
677 | /* Invalid error code received. */ | |
678 | ret = -LTTNG_ERR_UNK; | |
679 | } else { | |
680 | ret = -llm.ret_code; | |
681 | } | |
e368fb43 JG |
682 | goto end; |
683 | } | |
684 | ||
685 | if (llm.cmd_header_size > 0) { | |
686 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
687 | if (ret < 0) { | |
688 | goto end; | |
689 | } | |
690 | } | |
691 | ||
692 | /* Get command header from data transmission */ | |
693 | if (llm.data_size > 0) { | |
694 | ret = recv_payload_sessiond(reply, llm.data_size); | |
695 | if (ret < 0) { | |
696 | goto end; | |
697 | } | |
698 | } | |
699 | ||
700 | if (llm.fd_count > 0) { | |
fe489250 JG |
701 | ret = lttcomm_recv_payload_fds_unix_sock( |
702 | sessiond_socket, llm.fd_count, reply); | |
703 | if (ret < 0) { | |
e368fb43 JG |
704 | goto end; |
705 | } | |
706 | } | |
707 | ||
708 | /* Don't return the llm header to the caller. */ | |
709 | memmove(reply->buffer.data, reply->buffer.data + sizeof(llm), | |
710 | reply->buffer.size - sizeof(llm)); | |
711 | ret = lttng_dynamic_buffer_set_size( | |
712 | &reply->buffer, reply->buffer.size - sizeof(llm)); | |
713 | if (ret) { | |
714 | /* Can't happen as size is reduced. */ | |
715 | abort(); | |
716 | } | |
717 | ||
718 | ret = reply->buffer.size; | |
719 | ||
720 | end: | |
721 | disconnect_sessiond(); | |
722 | return ret; | |
723 | } | |
724 | ||
9f19cc17 | 725 | /* |
cd80958d | 726 | * Create lttng handle and return pointer. |
9ae110e2 | 727 | * |
1c8d13c8 | 728 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 729 | */ |
cd80958d DG |
730 | struct lttng_handle *lttng_create_handle(const char *session_name, |
731 | struct lttng_domain *domain) | |
9f19cc17 | 732 | { |
e1b624d0 | 733 | int ret; |
2f70b271 DG |
734 | struct lttng_handle *handle = NULL; |
735 | ||
3f451dc0 | 736 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 737 | if (handle == NULL) { |
2f70b271 | 738 | PERROR("malloc handle"); |
cd80958d DG |
739 | goto end; |
740 | } | |
741 | ||
742 | /* Copy session name */ | |
e1b624d0 JG |
743 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
744 | sizeof(handle->session_name)); | |
745 | if (ret) { | |
746 | goto error; | |
747 | } | |
cd80958d | 748 | |
95681498 JG |
749 | /* Copy lttng domain or leave initialized to 0. */ |
750 | if (domain) { | |
751 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
752 | } | |
cd80958d DG |
753 | |
754 | end: | |
755 | return handle; | |
e1b624d0 JG |
756 | error: |
757 | free(handle); | |
758 | return NULL; | |
cd80958d DG |
759 | } |
760 | ||
761 | /* | |
762 | * Destroy handle by free(3) the pointer. | |
763 | */ | |
764 | void lttng_destroy_handle(struct lttng_handle *handle) | |
765 | { | |
0e428499 | 766 | free(handle); |
eb354453 DG |
767 | } |
768 | ||
d9800920 DG |
769 | /* |
770 | * Register an outside consumer. | |
9ae110e2 | 771 | * |
1c8d13c8 | 772 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
773 | */ |
774 | int lttng_register_consumer(struct lttng_handle *handle, | |
775 | const char *socket_path) | |
776 | { | |
e1b624d0 | 777 | int ret; |
d9800920 DG |
778 | struct lttcomm_session_msg lsm; |
779 | ||
2f70b271 | 780 | if (handle == NULL || socket_path == NULL) { |
e1b624d0 JG |
781 | ret = -LTTNG_ERR_INVALID; |
782 | goto end; | |
2f70b271 DG |
783 | } |
784 | ||
53efb85a | 785 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 786 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
e1b624d0 | 787 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 788 | sizeof(lsm.session.name)); |
e1b624d0 JG |
789 | if (ret) { |
790 | ret = -LTTNG_ERR_INVALID; | |
791 | goto end; | |
792 | } | |
793 | ||
60160d2a | 794 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 795 | |
e1b624d0 JG |
796 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
797 | sizeof(lsm.u.reg.path)); | |
798 | if (ret) { | |
799 | ret = -LTTNG_ERR_INVALID; | |
800 | goto end; | |
801 | } | |
d9800920 | 802 | |
e1b624d0 JG |
803 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
804 | end: | |
805 | return ret; | |
d9800920 DG |
806 | } |
807 | ||
1df4dedd | 808 | /* |
9ae110e2 JG |
809 | * Start tracing for all traces of the session. |
810 | * | |
811 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 812 | */ |
6a4f824d | 813 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 814 | { |
e1b624d0 | 815 | int ret; |
cd80958d DG |
816 | struct lttcomm_session_msg lsm; |
817 | ||
6a4f824d | 818 | if (session_name == NULL) { |
e1b624d0 JG |
819 | ret = -LTTNG_ERR_INVALID; |
820 | goto end; | |
cd80958d DG |
821 | } |
822 | ||
53efb85a | 823 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 824 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 825 | |
e1b624d0 JG |
826 | ret = lttng_strncpy(lsm.session.name, session_name, |
827 | sizeof(lsm.session.name)); | |
828 | if (ret) { | |
829 | ret = -LTTNG_ERR_INVALID; | |
830 | goto end; | |
831 | } | |
cd80958d | 832 | |
e1b624d0 JG |
833 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
834 | end: | |
835 | return ret; | |
f3ed775e | 836 | } |
1df4dedd DG |
837 | |
838 | /* | |
38ee087f | 839 | * Stop tracing for all traces of the session. |
f3ed775e | 840 | */ |
38ee087f | 841 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 842 | { |
38ee087f | 843 | int ret, data_ret; |
cd80958d DG |
844 | struct lttcomm_session_msg lsm; |
845 | ||
6a4f824d | 846 | if (session_name == NULL) { |
e1b624d0 JG |
847 | ret = -LTTNG_ERR_INVALID; |
848 | goto error; | |
6a4f824d DG |
849 | } |
850 | ||
53efb85a | 851 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 852 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 853 | |
e1b624d0 JG |
854 | ret = lttng_strncpy(lsm.session.name, session_name, |
855 | sizeof(lsm.session.name)); | |
856 | if (ret) { | |
857 | ret = -LTTNG_ERR_INVALID; | |
858 | goto error; | |
859 | } | |
cd80958d | 860 | |
cac3069d | 861 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
862 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
863 | goto error; | |
864 | } | |
865 | ||
866 | if (!wait) { | |
867 | goto end; | |
868 | } | |
869 | ||
38ee087f DG |
870 | /* Check for data availability */ |
871 | do { | |
6d805429 | 872 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
873 | if (data_ret < 0) { |
874 | /* Return the data available call error. */ | |
875 | ret = data_ret; | |
876 | goto error; | |
877 | } | |
878 | ||
879 | /* | |
9ae110e2 JG |
880 | * Data sleep time before retrying (in usec). Don't sleep if the |
881 | * call returned value indicates availability. | |
38ee087f | 882 | */ |
6d805429 | 883 | if (data_ret) { |
c8f61fd4 | 884 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 885 | } |
6d805429 | 886 | } while (data_ret != 0); |
38ee087f | 887 | |
38ee087f DG |
888 | end: |
889 | error: | |
890 | return ret; | |
891 | } | |
892 | ||
893 | /* | |
894 | * Stop tracing and wait for data availability. | |
895 | */ | |
896 | int lttng_stop_tracing(const char *session_name) | |
897 | { | |
898 | return _lttng_stop_tracing(session_name, 1); | |
899 | } | |
900 | ||
901 | /* | |
902 | * Stop tracing but _don't_ wait for data availability. | |
903 | */ | |
904 | int lttng_stop_tracing_no_wait(const char *session_name) | |
905 | { | |
906 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
907 | } |
908 | ||
909 | /* | |
601d5acf DG |
910 | * Add context to a channel. |
911 | * | |
912 | * If the given channel is NULL, add the contexts to all channels. | |
913 | * The event_name param is ignored. | |
af87c45a DG |
914 | * |
915 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 916 | */ |
cd80958d | 917 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
918 | struct lttng_event_context *ctx, const char *event_name, |
919 | const char *channel_name) | |
d65106b1 | 920 | { |
2001793c JG |
921 | int ret; |
922 | size_t len = 0; | |
923 | char *buf = NULL; | |
cd80958d DG |
924 | struct lttcomm_session_msg lsm; |
925 | ||
9ae110e2 | 926 | /* Safety check. Both are mandatory. */ |
9d697d3d | 927 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
928 | ret = -LTTNG_ERR_INVALID; |
929 | goto end; | |
cd80958d DG |
930 | } |
931 | ||
441c16a7 | 932 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
933 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
934 | ||
85076754 | 935 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
936 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
937 | sizeof(lsm.u.context.channel_name)); | |
938 | if (ret) { | |
939 | ret = -LTTNG_ERR_INVALID; | |
940 | goto end; | |
85076754 | 941 | } |
cd80958d | 942 | |
60160d2a | 943 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
e1b624d0 | 944 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 945 | sizeof(lsm.session.name)); |
e1b624d0 JG |
946 | if (ret) { |
947 | ret = -LTTNG_ERR_INVALID; | |
948 | goto end; | |
949 | } | |
cd80958d | 950 | |
2001793c JG |
951 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
952 | size_t provider_len, ctx_len; | |
953 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
954 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
955 | ||
956 | if (!provider_name || !ctx_name) { | |
957 | ret = -LTTNG_ERR_INVALID; | |
958 | goto end; | |
959 | } | |
960 | ||
961 | provider_len = strlen(provider_name); | |
962 | if (provider_len == 0) { | |
963 | ret = -LTTNG_ERR_INVALID; | |
964 | goto end; | |
965 | } | |
966 | lsm.u.context.provider_name_len = provider_len; | |
967 | ||
968 | ctx_len = strlen(ctx_name); | |
969 | if (ctx_len == 0) { | |
970 | ret = -LTTNG_ERR_INVALID; | |
971 | goto end; | |
972 | } | |
973 | lsm.u.context.context_name_len = ctx_len; | |
974 | ||
975 | len = provider_len + ctx_len; | |
976 | buf = zmalloc(len); | |
977 | if (!buf) { | |
978 | ret = -LTTNG_ERR_NOMEM; | |
979 | goto end; | |
980 | } | |
981 | ||
982 | memcpy(buf, provider_name, provider_len); | |
983 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
984 | } | |
985 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
986 | |
987 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
988 | /* | |
989 | * Don't leak application addresses to the sessiond. | |
990 | * This is only necessary when ctx is for an app ctx otherwise | |
991 | * the values inside the union (type & config) are overwritten. | |
992 | */ | |
993 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
994 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
995 | } | |
2001793c | 996 | |
795a978d | 997 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
998 | end: |
999 | free(buf); | |
1000 | return ret; | |
d65106b1 DG |
1001 | } |
1002 | ||
f3ed775e | 1003 | /* |
9ae110e2 JG |
1004 | * Enable event(s) for a channel. |
1005 | * | |
1006 | * If no event name is specified, all events are enabled. | |
1007 | * If no channel name is specified, the default 'channel0' is used. | |
1008 | * | |
1009 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 1010 | */ |
cd80958d | 1011 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 1012 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 1013 | { |
f8a96544 JI |
1014 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
1015 | NULL, 0, NULL); | |
1df4dedd DG |
1016 | } |
1017 | ||
53a80697 | 1018 | /* |
025faf73 | 1019 | * Create or enable an event with a filter expression. |
178191b3 | 1020 | * |
53a80697 MD |
1021 | * Return negative error value on error. |
1022 | * Return size of returned session payload data if OK. | |
1023 | */ | |
025faf73 | 1024 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 1025 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
1026 | const char *filter_expression) |
1027 | { | |
f8a96544 JI |
1028 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
1029 | filter_expression, 0, NULL); | |
53a80697 MD |
1030 | } |
1031 | ||
347c5ab5 | 1032 | /* |
0e115563 | 1033 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1034 | * NULL if not applicable. |
1035 | * | |
1036 | * An event with NO loglevel and the name is * will return NULL. | |
1037 | */ | |
0e115563 | 1038 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1039 | { |
1040 | int err; | |
0e115563 | 1041 | char *agent_filter = NULL; |
347c5ab5 DG |
1042 | |
1043 | assert(ev); | |
1044 | ||
1045 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1046 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1047 | if (filter) { |
0e115563 | 1048 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
1049 | ev->name); |
1050 | } else { | |
0e115563 | 1051 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1052 | } |
1053 | if (err < 0) { | |
1054 | PERROR("asprintf"); | |
6a556f7b | 1055 | goto error; |
347c5ab5 DG |
1056 | } |
1057 | } | |
1058 | ||
1059 | /* Add loglevel filtering if any for the JUL domain. */ | |
1060 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1061 | const char *op; |
347c5ab5 DG |
1062 | |
1063 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1064 | op = ">="; | |
1065 | } else { | |
1066 | op = "=="; | |
1067 | } | |
1068 | ||
0e115563 | 1069 | if (filter || agent_filter) { |
6a556f7b JG |
1070 | char *new_filter; |
1071 | ||
fb0edb23 | 1072 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 1073 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 1074 | ev->loglevel); |
0e115563 DG |
1075 | if (agent_filter) { |
1076 | free(agent_filter); | |
6a556f7b | 1077 | } |
0e115563 | 1078 | agent_filter = new_filter; |
347c5ab5 | 1079 | } else { |
0e115563 | 1080 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
1081 | ev->loglevel); |
1082 | } | |
1083 | if (err < 0) { | |
1084 | PERROR("asprintf"); | |
6a556f7b | 1085 | goto error; |
347c5ab5 DG |
1086 | } |
1087 | } | |
1088 | ||
0e115563 | 1089 | return agent_filter; |
6a556f7b | 1090 | error: |
0e115563 | 1091 | free(agent_filter); |
6a556f7b | 1092 | return NULL; |
347c5ab5 DG |
1093 | } |
1094 | ||
93deb080 JI |
1095 | /* |
1096 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1097 | * If no event name is specified, all events are enabled. | |
1098 | * If no channel name is specified, the default name is used. | |
1099 | * If filter expression is not NULL, the filter is set for the event. | |
1100 | * If exclusion count is not zero, the exclusions are set for the event. | |
1101 | * Returns size of returned session payload data or a negative error code. | |
1102 | */ | |
1103 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1104 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1105 | const char *original_filter_expression, |
93deb080 JI |
1106 | int exclusion_count, char **exclusion_list) |
1107 | { | |
fe5e9e65 | 1108 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_ENABLE_EVENT }; |
e368fb43 | 1109 | struct lttng_payload payload; |
fe5e9e65 | 1110 | int ret = 0; |
137b9942 | 1111 | unsigned int free_filter_expression = 0; |
93deb080 | 1112 | struct filter_parser_ctx *ctx = NULL; |
fe5e9e65 | 1113 | size_t bytecode_len = 0; |
ec005ec6 | 1114 | |
6a0838b7 YL |
1115 | /* |
1116 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1117 | * a variable-length payload from where to send the data. |
6a0838b7 | 1118 | */ |
e368fb43 | 1119 | lttng_payload_init(&payload); |
ec005ec6 | 1120 | |
e9efbcd3 JG |
1121 | /* |
1122 | * Cast as non-const since we may replace the filter expression | |
1123 | * by a dynamically allocated string. Otherwise, the original | |
1124 | * string is not modified. | |
1125 | */ | |
1126 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1127 | |
1128 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1129 | ret = -LTTNG_ERR_INVALID; |
1130 | goto error; | |
93deb080 JI |
1131 | } |
1132 | ||
9ae110e2 JG |
1133 | /* |
1134 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1135 | * anyway, so treat this corner-case early to eliminate |
1136 | * lttng_fmemopen error for 0-byte allocation. | |
1137 | */ | |
1138 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1139 | ret = -LTTNG_ERR_INVALID; |
1140 | goto error; | |
93deb080 JI |
1141 | } |
1142 | ||
18a720cd | 1143 | if (ev->name[0] == '\0') { |
e1b624d0 JG |
1144 | /* Enable all events. */ |
1145 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
1146 | assert(ret == 0); | |
6565421f | 1147 | } |
93deb080 | 1148 | |
9ae110e2 | 1149 | /* Parse filter expression. */ |
5cdb6027 | 1150 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1151 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1152 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1153 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1154 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1155 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1156 | char *agent_filter; | |
64226865 | 1157 | |
fe5e9e65 | 1158 | /* Setup agent filter if needed. */ |
0e115563 DG |
1159 | agent_filter = set_agent_filter(filter_expression, ev); |
1160 | if (!agent_filter) { | |
137b9942 | 1161 | if (!filter_expression) { |
9ae110e2 JG |
1162 | /* |
1163 | * No JUL and no filter, just skip | |
1164 | * everything below. | |
1165 | */ | |
fe5e9e65 | 1166 | goto serialize; |
137b9942 | 1167 | } |
64226865 DG |
1168 | } else { |
1169 | /* | |
9ae110e2 JG |
1170 | * With an agent filter, the original filter has |
1171 | * been added to it thus replace the filter | |
1172 | * expression. | |
64226865 | 1173 | */ |
0e115563 | 1174 | filter_expression = agent_filter; |
e9efbcd3 | 1175 | free_filter_expression = 1; |
9b21e6d5 | 1176 | } |
9b21e6d5 | 1177 | } |
93deb080 | 1178 | |
fe5e9e65 JR |
1179 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == |
1180 | LTTNG_FILTER_MAX_LEN) { | |
1181 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1182 | goto error; | |
1183 | } | |
1184 | ||
e4d2f27a | 1185 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1186 | if (ret) { |
fe5e9e65 | 1187 | goto error; |
93deb080 | 1188 | } |
e4d2f27a | 1189 | |
fe5e9e65 JR |
1190 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + |
1191 | sizeof(ctx->bytecode->b); | |
1192 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
1193 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1194 | goto error; | |
1195 | } | |
6b453b5e JG |
1196 | } |
1197 | ||
fe5e9e65 JR |
1198 | serialize: |
1199 | ret = lttng_event_serialize(ev, exclusion_count, exclusion_list, | |
1200 | filter_expression, bytecode_len, | |
1201 | (ctx && bytecode_len) ? &ctx->bytecode->b : NULL, | |
1202 | &payload); | |
15e37663 | 1203 | if (ret) { |
fe5e9e65 JR |
1204 | ret = -LTTNG_ERR_INVALID; |
1205 | goto error; | |
6b453b5e | 1206 | } |
137b9942 | 1207 | |
fe5e9e65 JR |
1208 | /* If no channel name, send empty string. */ |
1209 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", | |
1210 | sizeof(lsm.u.enable.channel_name)); | |
1211 | if (ret) { | |
1212 | ret = -LTTNG_ERR_INVALID; | |
1213 | goto error; | |
6b453b5e | 1214 | } |
15e37663 | 1215 | |
fe5e9e65 JR |
1216 | /* Domain */ |
1217 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
15e37663 | 1218 | |
fe5e9e65 JR |
1219 | /* Session name */ |
1220 | ret = lttng_strncpy(lsm.session.name, handle->session_name, | |
1221 | sizeof(lsm.session.name)); | |
1222 | if (ret) { | |
1223 | ret = -LTTNG_ERR_INVALID; | |
1224 | goto error; | |
93deb080 JI |
1225 | } |
1226 | ||
fe5e9e65 JR |
1227 | /* Length of the serialized event. */ |
1228 | lsm.u.enable.length = (uint32_t) payload.buffer.size; | |
1229 | ||
e368fb43 JG |
1230 | { |
1231 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1232 | &payload, 0, -1); | |
fe489250 | 1233 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1234 | int fd_to_send; |
1235 | ||
1236 | if (fd_count < 0) { | |
fe5e9e65 | 1237 | goto error; |
e368fb43 JG |
1238 | } |
1239 | ||
1240 | assert(fd_count == 0 || fd_count == 1); | |
1241 | if (fd_count == 1) { | |
e2fc8e9d | 1242 | struct fd_handle *h = |
fe489250 JG |
1243 | lttng_payload_view_pop_fd_handle(&view); |
1244 | ||
e2fc8e9d | 1245 | if (!h) { |
fe5e9e65 | 1246 | goto error; |
e368fb43 JG |
1247 | } |
1248 | ||
e2fc8e9d SM |
1249 | fd_to_send = fd_handle_get_fd(h); |
1250 | fd_handle_put(h); | |
e368fb43 JG |
1251 | } |
1252 | ||
fe5e9e65 JR |
1253 | lsm.fd_count = fd_count; |
1254 | ||
e368fb43 JG |
1255 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1256 | fd_count ? &fd_to_send : NULL, fd_count, | |
1257 | view.buffer.size ? view.buffer.data : NULL, | |
1258 | view.buffer.size, NULL, NULL, 0); | |
1259 | } | |
93deb080 | 1260 | |
fe5e9e65 | 1261 | error: |
7ca1dc6f | 1262 | if (filter_expression && ctx) { |
93deb080 JI |
1263 | filter_bytecode_free(ctx); |
1264 | filter_ir_free(ctx); | |
1265 | filter_parser_ctx_free(ctx); | |
7ca1dc6f | 1266 | } |
7ca1dc6f DG |
1267 | if (free_filter_expression) { |
1268 | /* | |
9ae110e2 JG |
1269 | * The filter expression has been replaced and must be freed as |
1270 | * it is not the original filter expression received as a | |
1271 | * parameter. | |
7ca1dc6f DG |
1272 | */ |
1273 | free(filter_expression); | |
93deb080 | 1274 | } |
137b9942 | 1275 | /* |
9ae110e2 JG |
1276 | * Return directly to the caller and don't ask the sessiond since |
1277 | * something went wrong in the parsing of data above. | |
137b9942 | 1278 | */ |
e368fb43 | 1279 | lttng_payload_reset(&payload); |
93deb080 JI |
1280 | return ret; |
1281 | } | |
1282 | ||
6e911cad MD |
1283 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1284 | struct lttng_event *ev, const char *channel_name, | |
1285 | const char *original_filter_expression) | |
1df4dedd | 1286 | { |
fe5e9e65 JR |
1287 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_DISABLE_EVENT }; |
1288 | struct lttng_payload payload; | |
6e911cad MD |
1289 | int ret = 0; |
1290 | unsigned int free_filter_expression = 0; | |
1291 | struct filter_parser_ctx *ctx = NULL; | |
fe5e9e65 JR |
1292 | size_t bytecode_len = 0; |
1293 | ||
1294 | /* | |
1295 | * We have either a filter or some exclusions, so we need to set up | |
1296 | * a variable-length payload from where to send the data. | |
1297 | */ | |
1298 | lttng_payload_init(&payload); | |
1299 | ||
6e911cad MD |
1300 | /* |
1301 | * Cast as non-const since we may replace the filter expression | |
1302 | * by a dynamically allocated string. Otherwise, the original | |
1303 | * string is not modified. | |
1304 | */ | |
1305 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1306 | |
6e911cad MD |
1307 | if (handle == NULL || ev == NULL) { |
1308 | ret = -LTTNG_ERR_INVALID; | |
1309 | goto error; | |
1310 | } | |
1311 | ||
9ae110e2 JG |
1312 | /* |
1313 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1314 | * anyway, so treat this corner-case early to eliminate |
1315 | * lttng_fmemopen error for 0-byte allocation. | |
1316 | */ | |
1317 | if (filter_expression && filter_expression[0] == '\0') { | |
1318 | ret = -LTTNG_ERR_INVALID; | |
1319 | goto error; | |
cd80958d DG |
1320 | } |
1321 | ||
fe5e9e65 | 1322 | /* Parse filter expression. */ |
6e911cad | 1323 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1324 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1325 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1326 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1327 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1328 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1329 | char *agent_filter; | |
6e911cad | 1330 | |
fe5e9e65 | 1331 | /* Setup agent filter if needed. */ |
0e115563 DG |
1332 | agent_filter = set_agent_filter(filter_expression, ev); |
1333 | if (!agent_filter) { | |
6e911cad | 1334 | if (!filter_expression) { |
9ae110e2 JG |
1335 | /* |
1336 | * No JUL and no filter, just skip | |
1337 | * everything below. | |
1338 | */ | |
fe5e9e65 | 1339 | goto serialize; |
6e911cad MD |
1340 | } |
1341 | } else { | |
1342 | /* | |
fe5e9e65 | 1343 | * With an agent filter, the original filter has |
9ae110e2 JG |
1344 | * been added to it thus replace the filter |
1345 | * expression. | |
6e911cad | 1346 | */ |
0e115563 | 1347 | filter_expression = agent_filter; |
6e911cad MD |
1348 | free_filter_expression = 1; |
1349 | } | |
1350 | } | |
1351 | ||
fe5e9e65 JR |
1352 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == |
1353 | LTTNG_FILTER_MAX_LEN) { | |
1354 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1355 | goto error; | |
1356 | } | |
1357 | ||
e4d2f27a | 1358 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad | 1359 | if (ret) { |
fe5e9e65 | 1360 | goto error; |
6e911cad | 1361 | } |
e4d2f27a | 1362 | |
fe5e9e65 JR |
1363 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + |
1364 | sizeof(ctx->bytecode->b); | |
1365 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
1366 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1367 | goto error; | |
1368 | } | |
6e911cad MD |
1369 | } |
1370 | ||
fe5e9e65 JR |
1371 | serialize: |
1372 | ret = lttng_event_serialize(ev, 0, NULL, | |
1373 | filter_expression, bytecode_len, | |
1374 | (ctx && bytecode_len) ? &ctx->bytecode->b : NULL, | |
1375 | &payload); | |
1376 | if (ret) { | |
1377 | ret = -LTTNG_ERR_INVALID; | |
1378 | goto error; | |
6e911cad MD |
1379 | } |
1380 | ||
fe5e9e65 JR |
1381 | /* If no channel name, send empty string. */ |
1382 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", | |
1383 | sizeof(lsm.u.disable.channel_name)); | |
1384 | if (ret) { | |
1385 | ret = -LTTNG_ERR_INVALID; | |
1386 | goto error; | |
6e911cad | 1387 | } |
fe5e9e65 JR |
1388 | |
1389 | /* Domain */ | |
1390 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1391 | ||
1392 | /* Session name */ | |
1393 | ret = lttng_strncpy(lsm.session.name, handle->session_name, | |
1394 | sizeof(lsm.session.name)); | |
1395 | if (ret) { | |
1396 | ret = -LTTNG_ERR_INVALID; | |
1397 | goto error; | |
6e911cad MD |
1398 | } |
1399 | ||
fe5e9e65 JR |
1400 | /* Length of the serialized event. */ |
1401 | lsm.u.disable.length = (uint32_t) payload.buffer.size; | |
1402 | ||
1403 | { | |
1404 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1405 | &payload, 0, -1); | |
1406 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); | |
1407 | int fd_to_send; | |
1408 | ||
1409 | if (fd_count < 0) { | |
1410 | goto error; | |
1411 | } | |
1412 | ||
1413 | assert(fd_count == 0 || fd_count == 1); | |
1414 | if (fd_count == 1) { | |
1415 | struct fd_handle *h = | |
1416 | lttng_payload_view_pop_fd_handle(&view); | |
6e911cad | 1417 | |
fe5e9e65 JR |
1418 | if (!h) { |
1419 | goto error; | |
1420 | } | |
1421 | ||
1422 | fd_to_send = fd_handle_get_fd(h); | |
1423 | fd_handle_put(h); | |
1424 | } | |
1425 | ||
1426 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1427 | fd_count ? &fd_to_send : NULL, fd_count, | |
1428 | view.buffer.size ? view.buffer.data : NULL, | |
1429 | view.buffer.size, NULL, NULL, 0); | |
1430 | } | |
1431 | ||
1432 | error: | |
6e911cad MD |
1433 | if (filter_expression && ctx) { |
1434 | filter_bytecode_free(ctx); | |
1435 | filter_ir_free(ctx); | |
1436 | filter_parser_ctx_free(ctx); | |
1437 | } | |
6e911cad MD |
1438 | if (free_filter_expression) { |
1439 | /* | |
9ae110e2 JG |
1440 | * The filter expression has been replaced and must be freed as |
1441 | * it is not the original filter expression received as a | |
1442 | * parameter. | |
6e911cad MD |
1443 | */ |
1444 | free(filter_expression); | |
1445 | } | |
6e911cad | 1446 | /* |
9ae110e2 JG |
1447 | * Return directly to the caller and don't ask the sessiond since |
1448 | * something went wrong in the parsing of data above. | |
6e911cad | 1449 | */ |
fe5e9e65 | 1450 | lttng_payload_reset(&payload); |
6e911cad MD |
1451 | return ret; |
1452 | } | |
1453 | ||
1454 | /* | |
9ae110e2 JG |
1455 | * Disable event(s) of a channel and domain. |
1456 | * If no event name is specified, all events are disabled. | |
1457 | * If no channel name is specified, the default 'channel0' is used. | |
1458 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1459 | */ |
1460 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1461 | const char *channel_name) | |
1462 | { | |
e1b624d0 | 1463 | int ret; |
6e911cad MD |
1464 | struct lttng_event ev; |
1465 | ||
1466 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1467 | ev.loglevel = -1; |
6e911cad | 1468 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1469 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1470 | if (ret) { | |
1471 | ret = -LTTNG_ERR_INVALID; | |
1472 | goto end; | |
1473 | } | |
1474 | ||
1475 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1476 | end: | |
1477 | return ret; | |
1df4dedd DG |
1478 | } |
1479 | ||
cf0bcb51 JG |
1480 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1481 | { | |
1482 | struct lttng_channel *channel = NULL; | |
cf0bcb51 JG |
1483 | |
1484 | if (!domain) { | |
714363d3 | 1485 | goto end; |
cf0bcb51 JG |
1486 | } |
1487 | ||
1488 | /* Validate domain. */ | |
1489 | switch (domain->type) { | |
1490 | case LTTNG_DOMAIN_UST: | |
1491 | switch (domain->buf_type) { | |
1492 | case LTTNG_BUFFER_PER_UID: | |
1493 | case LTTNG_BUFFER_PER_PID: | |
1494 | break; | |
1495 | default: | |
714363d3 | 1496 | goto end; |
cf0bcb51 JG |
1497 | } |
1498 | break; | |
1499 | case LTTNG_DOMAIN_KERNEL: | |
1500 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
714363d3 | 1501 | goto end; |
cf0bcb51 JG |
1502 | } |
1503 | break; | |
1504 | default: | |
714363d3 | 1505 | goto end; |
cf0bcb51 JG |
1506 | } |
1507 | ||
714363d3 | 1508 | channel = lttng_channel_create_internal(); |
cf0bcb51 | 1509 | if (!channel) { |
714363d3 | 1510 | goto end; |
cf0bcb51 JG |
1511 | } |
1512 | ||
cf0bcb51 | 1513 | lttng_channel_set_default_attr(domain, &channel->attr); |
714363d3 | 1514 | end: |
cf0bcb51 | 1515 | return channel; |
cf0bcb51 JG |
1516 | } |
1517 | ||
1518 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1519 | { | |
1520 | if (!channel) { | |
1521 | return; | |
1522 | } | |
1523 | ||
1524 | if (channel->attr.extended.ptr) { | |
1525 | free(channel->attr.extended.ptr); | |
1526 | } | |
1527 | free(channel); | |
1528 | } | |
1529 | ||
1df4dedd | 1530 | /* |
9ae110e2 JG |
1531 | * Enable channel per domain |
1532 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1533 | */ |
cd80958d | 1534 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1535 | struct lttng_channel *in_chan) |
a5c5a2bd | 1536 | { |
d72eb77f | 1537 | enum lttng_error_code ret_code; |
e1b624d0 | 1538 | int ret; |
714363d3 | 1539 | struct lttng_dynamic_buffer buffer; |
cd80958d | 1540 | struct lttcomm_session_msg lsm; |
d72eb77f | 1541 | uint64_t total_buffer_size_needed_per_cpu = 0; |
714363d3 JR |
1542 | struct lttng_channel *channel = NULL; |
1543 | ||
1544 | lttng_dynamic_buffer_init(&buffer); | |
cd80958d | 1545 | |
9ae110e2 | 1546 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1547 | if (handle == NULL || in_chan == NULL) { |
714363d3 JR |
1548 | ret = -LTTNG_ERR_INVALID; |
1549 | goto end; | |
cf0bcb51 | 1550 | } |
cd80958d | 1551 | |
09b72f7a FD |
1552 | /* |
1553 | * Verify that the amount of memory required to create the requested | |
1554 | * buffer is available on the system at the moment. | |
1555 | */ | |
714363d3 JR |
1556 | if (in_chan->attr.num_subbuf > |
1557 | UINT64_MAX / in_chan->attr.subbuf_size) { | |
d72eb77f JR |
1558 | /* Overflow */ |
1559 | ret = -LTTNG_ERR_OVERFLOW; | |
1560 | goto end; | |
1561 | } | |
1562 | ||
714363d3 JR |
1563 | total_buffer_size_needed_per_cpu = |
1564 | in_chan->attr.num_subbuf * in_chan->attr.subbuf_size; | |
d72eb77f JR |
1565 | ret_code = check_enough_available_memory( |
1566 | total_buffer_size_needed_per_cpu); | |
1567 | if (ret_code != LTTNG_OK) { | |
1568 | ret = -ret_code; | |
1569 | goto end; | |
09b72f7a FD |
1570 | } |
1571 | ||
714363d3 JR |
1572 | /* Copy the channel for easier manipulation. */ |
1573 | channel = lttng_channel_copy(in_chan); | |
1574 | if (!channel) { | |
1575 | ret = -LTTNG_ERR_NOMEM; | |
1576 | goto end; | |
1577 | } | |
1578 | ||
1579 | /* Populate the channel extended attribute if necessary. */ | |
1580 | if (!channel->attr.extended.ptr) { | |
1581 | struct lttng_channel_extended *extended = | |
1582 | (struct lttng_channel_extended *) zmalloc( | |
1583 | sizeof(*extended)); | |
1584 | ||
1585 | if (!extended) { | |
1586 | ret = -LTTNG_ERR_NOMEM; | |
1587 | goto end; | |
1588 | } | |
1589 | lttng_channel_set_default_extended_attr( | |
1590 | &handle->domain, extended); | |
1591 | channel->attr.extended.ptr = extended; | |
1592 | } | |
1593 | ||
1594 | /* Prepare the payload */ | |
1595 | memset(&lsm, 0, sizeof(lsm)); | |
1596 | ||
cf0bcb51 | 1597 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1598 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1599 | |
e1b624d0 JG |
1600 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1601 | sizeof(lsm.session.name)); | |
1602 | if (ret) { | |
1603 | ret = -LTTNG_ERR_INVALID; | |
1604 | goto end; | |
1605 | } | |
cd80958d | 1606 | |
714363d3 JR |
1607 | ret = lttng_channel_serialize(channel, &buffer); |
1608 | if (ret) { | |
1609 | ret = -LTTNG_ERR_FATAL; | |
1610 | goto end; | |
1611 | } | |
1612 | ||
1613 | lsm.u.channel.length = buffer.size; | |
1614 | ||
1615 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( | |
1616 | &lsm, buffer.data, buffer.size, NULL); | |
e1b624d0 | 1617 | end: |
714363d3 JR |
1618 | lttng_channel_destroy(channel); |
1619 | lttng_dynamic_buffer_reset(&buffer); | |
e1b624d0 | 1620 | return ret; |
8c0faa1d | 1621 | } |
1df4dedd | 1622 | |
2ef84c95 | 1623 | /* |
9ae110e2 JG |
1624 | * All tracing will be stopped for registered events of the channel. |
1625 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1626 | */ |
cd80958d | 1627 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1628 | { |
e1b624d0 | 1629 | int ret; |
cd80958d DG |
1630 | struct lttcomm_session_msg lsm; |
1631 | ||
9ae110e2 | 1632 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1633 | if (handle == NULL || name == NULL) { |
2f70b271 | 1634 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1635 | } |
1636 | ||
441c16a7 MD |
1637 | memset(&lsm, 0, sizeof(lsm)); |
1638 | ||
cd80958d | 1639 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1640 | |
e1b624d0 | 1641 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1642 | sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1643 | if (ret) { |
1644 | ret = -LTTNG_ERR_INVALID; | |
1645 | goto end; | |
1646 | } | |
9d697d3d | 1647 | |
60160d2a | 1648 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1649 | |
e1b624d0 JG |
1650 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1651 | sizeof(lsm.session.name)); | |
1652 | if (ret) { | |
1653 | ret = -LTTNG_ERR_INVALID; | |
1654 | goto end; | |
1655 | } | |
cd80958d | 1656 | |
e1b624d0 JG |
1657 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1658 | end: | |
1659 | return ret; | |
ca95a216 DG |
1660 | } |
1661 | ||
fac6795d | 1662 | /* |
9ae110e2 JG |
1663 | * Lists all available tracepoints of domain. |
1664 | * Sets the contents of the events array. | |
1665 | * Returns the number of lttng_event entries in events; | |
1666 | * on error, returns a negative value. | |
fac6795d | 1667 | */ |
cd80958d | 1668 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1669 | struct lttng_event **events) |
fac6795d | 1670 | { |
fe5e9e65 JR |
1671 | enum lttng_error_code ret_code; |
1672 | int ret, total_payload_received; | |
1673 | char *reception_buffer = NULL; | |
1674 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRACEPOINTS }; | |
1675 | struct lttcomm_list_command_header *cmd_header = NULL; | |
1676 | size_t cmd_header_len; | |
1677 | unsigned int nb_events = 0; | |
1678 | ||
1679 | if (handle == NULL) { | |
1680 | ret = -LTTNG_ERR_INVALID; | |
1681 | goto end; | |
1682 | } | |
1683 | ||
1684 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1685 | ||
1686 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, | |
1687 | (void **) &reception_buffer, (void **) &cmd_header, | |
1688 | &cmd_header_len); | |
1689 | if (ret < 0) { | |
1690 | goto end; | |
1691 | } | |
1692 | ||
1693 | total_payload_received = ret; | |
1694 | ||
1695 | if (!cmd_header) { | |
1696 | ret = -LTTNG_ERR_UNK; | |
1697 | goto end; | |
1698 | } | |
1699 | ||
1700 | if (cmd_header->count > INT_MAX) { | |
1701 | ret = -LTTNG_ERR_OVERFLOW; | |
1702 | goto end; | |
1703 | } | |
1704 | ||
1705 | nb_events = (unsigned int) cmd_header->count; | |
fac6795d | 1706 | |
fe5e9e65 JR |
1707 | { |
1708 | struct lttng_buffer_view events_view = | |
1709 | lttng_buffer_view_init(reception_buffer, 0, | |
1710 | total_payload_received); | |
1711 | struct lttng_payload_view events_payload_view = | |
1712 | lttng_payload_view_from_buffer_view( | |
1713 | &events_view, 0, -1); | |
2a71efd5 | 1714 | |
fe5e9e65 JR |
1715 | ret_code = lttng_events_create_and_flatten_from_payload( |
1716 | &events_payload_view, nb_events, events); | |
1717 | if (ret_code != LTTNG_OK) { | |
1718 | ret = -ret_code; | |
1719 | goto end; | |
1720 | } | |
eb354453 | 1721 | } |
fac6795d | 1722 | |
fe5e9e65 JR |
1723 | ret = (int) nb_events; |
1724 | ||
1725 | end: | |
1726 | free(cmd_header); | |
1727 | free(reception_buffer); | |
1728 | return ret; | |
fac6795d DG |
1729 | } |
1730 | ||
f37d259d | 1731 | /* |
9ae110e2 JG |
1732 | * Lists all available tracepoint fields of domain. |
1733 | * Sets the contents of the event field array. | |
1734 | * Returns the number of lttng_event_field entries in events; | |
1735 | * on error, returns a negative value. | |
f37d259d MD |
1736 | */ |
1737 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1738 | struct lttng_event_field **fields) | |
1739 | { | |
1740 | int ret; | |
1741 | struct lttcomm_session_msg lsm; | |
1742 | ||
1743 | if (handle == NULL) { | |
2f70b271 | 1744 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1745 | } |
1746 | ||
53efb85a | 1747 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1748 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1749 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1750 | |
cac3069d | 1751 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1752 | if (ret < 0) { |
1753 | return ret; | |
1754 | } | |
1755 | ||
1756 | return ret / sizeof(struct lttng_event_field); | |
1757 | } | |
1758 | ||
834978fd | 1759 | /* |
9ae110e2 JG |
1760 | * Lists all available kernel system calls. Allocates and sets the contents of |
1761 | * the events array. | |
834978fd | 1762 | * |
9ae110e2 JG |
1763 | * Returns the number of lttng_event entries in events; on error, returns a |
1764 | * negative value. | |
834978fd DG |
1765 | */ |
1766 | int lttng_list_syscalls(struct lttng_event **events) | |
1767 | { | |
fe5e9e65 JR |
1768 | enum lttng_error_code ret_code; |
1769 | int ret, total_payload_received; | |
1770 | char *reception_buffer = NULL; | |
1771 | struct lttcomm_session_msg lsm = {}; | |
1772 | struct lttcomm_list_command_header *cmd_header = NULL; | |
1773 | size_t cmd_header_len; | |
1774 | uint32_t nb_events = 0; | |
1775 | ||
1776 | if (!events) { | |
1777 | ret = -LTTNG_ERR_INVALID; | |
1778 | goto end; | |
1779 | } | |
1780 | ||
1781 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1782 | /* Force kernel domain for system calls. */ | |
1783 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1784 | ||
1785 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, | |
1786 | (void **) &reception_buffer, (void **) &cmd_header, | |
1787 | &cmd_header_len); | |
1788 | if (ret < 0) { | |
1789 | goto end; | |
1790 | } | |
1791 | total_payload_received = ret; | |
1792 | ||
1793 | if (!cmd_header) { | |
1794 | ret = -LTTNG_ERR_UNK; | |
1795 | goto end; | |
1796 | } | |
1797 | ||
1798 | if (cmd_header->count > INT_MAX) { | |
1799 | ret = -LTTNG_ERR_OVERFLOW; | |
1800 | goto end; | |
1801 | } | |
1802 | ||
1803 | nb_events = (unsigned int) cmd_header->count; | |
1804 | ||
1805 | { | |
1806 | const struct lttng_buffer_view events_view = | |
1807 | lttng_buffer_view_init(reception_buffer, 0, | |
1808 | total_payload_received); | |
1809 | struct lttng_payload_view events_payload_view = | |
1810 | lttng_payload_view_from_buffer_view( | |
1811 | &events_view, 0, -1); | |
1812 | ||
1813 | ret_code = lttng_events_create_and_flatten_from_payload( | |
1814 | &events_payload_view, nb_events, events); | |
1815 | if (ret_code != LTTNG_OK) { | |
1816 | ret = -ret_code; | |
1817 | goto end; | |
1818 | } | |
1819 | } | |
1820 | ||
1821 | ret = (int) nb_events; | |
834978fd | 1822 | |
fe5e9e65 JR |
1823 | end: |
1824 | free(reception_buffer); | |
1825 | free(cmd_header); | |
1826 | return ret; | |
834978fd DG |
1827 | } |
1828 | ||
1657e9bb | 1829 | /* |
9ae110e2 JG |
1830 | * Returns a human readable string describing |
1831 | * the error code (a negative value). | |
1657e9bb | 1832 | */ |
9a745bc7 | 1833 | const char *lttng_strerror(int code) |
1657e9bb | 1834 | { |
f73fabfd | 1835 | return error_get_str(code); |
1657e9bb DG |
1836 | } |
1837 | ||
b178f53e JG |
1838 | enum lttng_error_code lttng_create_session_ext( |
1839 | struct lttng_session_descriptor *session_descriptor) | |
1840 | { | |
1841 | enum lttng_error_code ret_code; | |
1842 | struct lttcomm_session_msg lsm = { | |
1843 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1844 | }; | |
1845 | void *reply = NULL; | |
1846 | struct lttng_buffer_view reply_view; | |
1847 | int reply_ret; | |
1848 | bool sessiond_must_generate_ouput; | |
1849 | struct lttng_dynamic_buffer payload; | |
1850 | int ret; | |
1851 | size_t descriptor_size; | |
1852 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1853 | ||
1854 | lttng_dynamic_buffer_init(&payload); | |
1855 | if (!session_descriptor) { | |
1856 | ret_code = LTTNG_ERR_INVALID; | |
1857 | goto end; | |
1858 | } | |
1859 | ||
1860 | sessiond_must_generate_ouput = | |
1861 | !lttng_session_descriptor_is_output_destination_initialized( | |
1862 | session_descriptor); | |
1863 | if (sessiond_must_generate_ouput) { | |
1864 | const char *home_dir = utils_get_home_dir(); | |
1865 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1866 | ||
1867 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1868 | ret_code = LTTNG_ERR_FATAL; | |
1869 | goto end; | |
1870 | } | |
1871 | ||
1872 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1873 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1874 | home_dir_len); | |
1875 | if (ret) { | |
1876 | ret_code = LTTNG_ERR_NOMEM; | |
1877 | goto end; | |
1878 | } | |
1879 | } | |
1880 | ||
1881 | descriptor_size = payload.size; | |
1882 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1883 | &payload); | |
1884 | if (ret) { | |
1885 | ret_code = LTTNG_ERR_INVALID; | |
1886 | goto end; | |
1887 | } | |
1888 | descriptor_size = payload.size - descriptor_size; | |
1889 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1890 | ||
1891 | /* Command returns a session descriptor on success. */ | |
1892 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1893 | payload.size, &reply); | |
1894 | if (reply_ret < 0) { | |
1895 | ret_code = -reply_ret; | |
1896 | goto end; | |
1897 | } else if (reply_ret == 0) { | |
1898 | /* Socket unexpectedly closed by the session daemon. */ | |
1899 | ret_code = LTTNG_ERR_FATAL; | |
1900 | goto end; | |
1901 | } | |
1902 | ||
1903 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1904 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1905 | &descriptor_reply); | |
1906 | if (ret < 0) { | |
1907 | ret_code = LTTNG_ERR_FATAL; | |
1908 | goto end; | |
1909 | } | |
1910 | ret_code = LTTNG_OK; | |
1911 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1912 | end: | |
1913 | free(reply); | |
1914 | lttng_dynamic_buffer_reset(&payload); | |
1915 | lttng_session_descriptor_destroy(descriptor_reply); | |
1916 | return ret_code; | |
1917 | } | |
1918 | ||
aaf97519 | 1919 | /* |
b178f53e | 1920 | * Create a new session using name and url for destination. |
a4b92340 | 1921 | * |
780d4bb8 | 1922 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1923 | */ |
a4b92340 | 1924 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1925 | { |
3dd05a85 | 1926 | int ret; |
a4b92340 | 1927 | ssize_t size; |
a4b92340 | 1928 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1929 | struct lttng_session_descriptor *descriptor = NULL; |
1930 | enum lttng_error_code ret_code; | |
00e2e675 | 1931 | |
b178f53e JG |
1932 | if (!name) { |
1933 | ret = -LTTNG_ERR_INVALID; | |
1934 | goto end; | |
00e2e675 DG |
1935 | } |
1936 | ||
bc894455 | 1937 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1938 | if (size < 0) { |
b178f53e JG |
1939 | ret = -LTTNG_ERR_INVALID; |
1940 | goto end; | |
1941 | } | |
1942 | switch (size) { | |
1943 | case 0: | |
1944 | descriptor = lttng_session_descriptor_create(name); | |
1945 | break; | |
1946 | case 1: | |
1947 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1948 | ret = -LTTNG_ERR_INVALID; | |
1949 | goto end; | |
1950 | } | |
1951 | descriptor = lttng_session_descriptor_local_create(name, | |
1952 | uris[0].dst.path); | |
1953 | break; | |
1954 | case 2: | |
1955 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1956 | NULL); | |
1957 | break; | |
1958 | default: | |
1959 | ret = -LTTNG_ERR_INVALID; | |
1960 | goto end; | |
1961 | } | |
1962 | if (!descriptor) { | |
1963 | ret = -LTTNG_ERR_INVALID; | |
1964 | goto end; | |
00e2e675 | 1965 | } |
b178f53e JG |
1966 | ret_code = lttng_create_session_ext(descriptor); |
1967 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1968 | end: | |
1969 | lttng_session_descriptor_destroy(descriptor); | |
1970 | free(uris); | |
1971 | return ret; | |
1972 | } | |
00e2e675 | 1973 | |
b178f53e JG |
1974 | /* |
1975 | * Create a session exclusively used for snapshot. | |
1976 | * | |
780d4bb8 | 1977 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1978 | */ |
1979 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1980 | { | |
1981 | int ret; | |
1982 | enum lttng_error_code ret_code; | |
1983 | ssize_t size; | |
1984 | struct lttng_uri *uris = NULL; | |
1985 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1986 | |
b178f53e JG |
1987 | if (!name) { |
1988 | ret = -LTTNG_ERR_INVALID; | |
1989 | goto end; | |
1990 | } | |
1991 | ||
1992 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1993 | if (size < 0) { | |
1994 | ret = -LTTNG_ERR_INVALID; | |
1995 | goto end; | |
1996 | } | |
1997 | /* | |
1998 | * If the user does not specify a custom subdir, use the session name. | |
1999 | */ | |
2000 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
2001 | strlen(uris[0].subdir) == 0) { | |
2002 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
2003 | name); | |
2004 | if (ret < 0) { | |
2005 | PERROR("Failed to set session name as network destination sub-directory"); | |
2006 | ret = -LTTNG_ERR_FATAL; | |
2007 | goto end; | |
2008 | } else if (ret >= sizeof(uris[0].subdir)) { | |
2009 | /* Truncated output. */ | |
2010 | ret = -LTTNG_ERR_INVALID; | |
2011 | goto end; | |
2012 | } | |
2013 | } | |
3dd05a85 | 2014 | |
b178f53e JG |
2015 | switch (size) { |
2016 | case 0: | |
2017 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
2018 | break; | |
2019 | case 1: | |
2020 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
2021 | ret = -LTTNG_ERR_INVALID; | |
2022 | goto end; | |
2023 | } | |
2024 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
2025 | name, | |
2026 | uris[0].dst.path); | |
2027 | break; | |
2028 | case 2: | |
2029 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
2030 | name, | |
2031 | snapshot_url, | |
2032 | NULL); | |
2033 | break; | |
2034 | default: | |
2035 | ret = -LTTNG_ERR_INVALID; | |
2036 | goto end; | |
2037 | } | |
2038 | if (!descriptor) { | |
2039 | ret = -LTTNG_ERR_INVALID; | |
2040 | goto end; | |
2041 | } | |
2042 | ret_code = lttng_create_session_ext(descriptor); | |
2043 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2044 | end: | |
2045 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
2046 | free(uris); |
2047 | return ret; | |
00e2e675 DG |
2048 | } |
2049 | ||
b178f53e JG |
2050 | /* |
2051 | * Create a session exclusively used for live. | |
2052 | * | |
780d4bb8 | 2053 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2054 | */ |
2055 | int lttng_create_session_live(const char *name, const char *url, | |
2056 | unsigned int timer_interval) | |
2057 | { | |
2058 | int ret; | |
2059 | enum lttng_error_code ret_code; | |
2060 | struct lttng_session_descriptor *descriptor = NULL; | |
2061 | ||
2062 | if (!name) { | |
2063 | ret = -LTTNG_ERR_INVALID; | |
2064 | goto end; | |
2065 | } | |
2066 | ||
2067 | if (url) { | |
2068 | descriptor = lttng_session_descriptor_live_network_create( | |
2069 | name, url, NULL, timer_interval); | |
2070 | } else { | |
2071 | descriptor = lttng_session_descriptor_live_create( | |
2072 | name, timer_interval); | |
2073 | } | |
2074 | if (!descriptor) { | |
2075 | ret = -LTTNG_ERR_INVALID; | |
2076 | goto end; | |
2077 | } | |
2078 | ret_code = lttng_create_session_ext(descriptor); | |
2079 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2080 | end: | |
2081 | lttng_session_descriptor_destroy(descriptor); | |
2082 | return ret; | |
2083 | } | |
2084 | ||
e20ee7c2 JD |
2085 | /* |
2086 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2087 | * |
2088 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2089 | */ |
2090 | int lttng_destroy_session(const char *session_name) | |
2091 | { | |
2092 | int ret; | |
3e3665b8 JG |
2093 | enum lttng_error_code ret_code; |
2094 | enum lttng_destruction_handle_status status; | |
2095 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2096 | |
2097 | /* | |
3e3665b8 JG |
2098 | * Stop the tracing and wait for the data to be |
2099 | * consumed. | |
e20ee7c2 JD |
2100 | */ |
2101 | ret = _lttng_stop_tracing(session_name, 1); | |
2102 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2103 | goto end; | |
2104 | } | |
2105 | ||
3e3665b8 JG |
2106 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2107 | if (ret_code != LTTNG_OK) { | |
2108 | ret = (int) -ret_code; | |
2109 | goto end; | |
2110 | } | |
2111 | assert(handle); | |
2112 | ||
2113 | /* Block until the completion of the destruction of the session. */ | |
2114 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2115 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2116 | ret = -LTTNG_ERR_UNK; | |
2117 | goto end; | |
2118 | } | |
2119 | ||
2120 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2121 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2122 | ret = -LTTNG_ERR_UNK; | |
2123 | goto end; | |
2124 | } | |
780d4bb8 | 2125 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2126 | end: |
3e3665b8 | 2127 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2128 | return ret; |
2129 | } | |
2130 | ||
2131 | /* | |
2132 | * Destroy the session without waiting for the data. | |
2133 | */ | |
2134 | int lttng_destroy_session_no_wait(const char *session_name) | |
2135 | { | |
3e3665b8 | 2136 | enum lttng_error_code ret_code; |
e20ee7c2 | 2137 | |
3e3665b8 | 2138 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
3204017e | 2139 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2140 | } |
2141 | ||
57167058 | 2142 | /* |
9ae110e2 JG |
2143 | * Ask the session daemon for all available sessions. |
2144 | * Sets the contents of the sessions array. | |
2145 | * Returns the number of lttng_session entries in sessions; | |
2146 | * on error, returns a negative value. | |
57167058 | 2147 | */ |
b178f53e | 2148 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2149 | { |
ca95a216 | 2150 | int ret; |
cd80958d | 2151 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2152 | const size_t session_size = sizeof(struct lttng_session) + |
2153 | sizeof(struct lttng_session_extended); | |
2154 | size_t session_count, i; | |
2155 | struct lttng_session_extended *sessions_extended_begin; | |
2156 | struct lttng_session *sessions = NULL; | |
57167058 | 2157 | |
53efb85a | 2158 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2159 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
e8a09c09 MD |
2160 | /* |
2161 | * Initialize out_sessions to NULL so it is initialized when | |
2162 | * lttng_list_sessions returns 0, thus allowing *out_sessions to | |
2163 | * be subsequently freed. | |
2164 | */ | |
2165 | *out_sessions = NULL; | |
b178f53e JG |
2166 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2167 | if (ret <= 0) { | |
b178f53e JG |
2168 | goto end; |
2169 | } | |
2170 | if (!sessions) { | |
2171 | ret = -LTTNG_ERR_FATAL; | |
2172 | goto end; | |
2173 | } | |
2174 | ||
2175 | if (ret % session_size) { | |
2176 | ret = -LTTNG_ERR_UNK; | |
2177 | free(sessions); | |
b178f53e | 2178 | goto end; |
57167058 | 2179 | } |
b178f53e JG |
2180 | session_count = (size_t) ret / session_size; |
2181 | sessions_extended_begin = (struct lttng_session_extended *) | |
2182 | (&sessions[session_count]); | |
57167058 | 2183 | |
b178f53e JG |
2184 | /* Set extended session info pointers. */ |
2185 | for (i = 0; i < session_count; i++) { | |
2186 | struct lttng_session *session = &sessions[i]; | |
2187 | struct lttng_session_extended *extended = | |
2188 | &(sessions_extended_begin[i]); | |
2189 | ||
2190 | session->extended.ptr = extended; | |
2191 | } | |
2192 | ||
2193 | ret = (int) session_count; | |
2194 | *out_sessions = sessions; | |
2195 | end: | |
2196 | return ret; | |
2197 | } | |
2198 | ||
2199 | enum lttng_error_code lttng_session_get_creation_time( | |
2200 | const struct lttng_session *session, uint64_t *creation_time) | |
2201 | { | |
2202 | enum lttng_error_code ret = LTTNG_OK; | |
2203 | struct lttng_session_extended *extended; | |
2204 | ||
2205 | if (!session || !creation_time || !session->extended.ptr) { | |
2206 | ret = LTTNG_ERR_INVALID; | |
2207 | goto end; | |
2208 | } | |
2209 | ||
2210 | extended = session->extended.ptr; | |
2211 | if (!extended->creation_time.is_set) { | |
2212 | /* Not created on the session daemon yet. */ | |
2213 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2214 | goto end; | |
2215 | } | |
2216 | *creation_time = extended->creation_time.value; | |
2217 | end: | |
2218 | return ret; | |
57167058 DG |
2219 | } |
2220 | ||
d7ba1388 MD |
2221 | int lttng_set_session_shm_path(const char *session_name, |
2222 | const char *shm_path) | |
2223 | { | |
e1b624d0 | 2224 | int ret; |
d7ba1388 MD |
2225 | struct lttcomm_session_msg lsm; |
2226 | ||
2227 | if (session_name == NULL) { | |
2228 | return -LTTNG_ERR_INVALID; | |
2229 | } | |
2230 | ||
2231 | memset(&lsm, 0, sizeof(lsm)); | |
2232 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2233 | ||
e1b624d0 | 2234 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2235 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2236 | if (ret) { |
2237 | ret = -LTTNG_ERR_INVALID; | |
2238 | goto end; | |
2239 | } | |
2240 | ||
2241 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2242 | sizeof(lsm.u.set_shm_path.shm_path)); |
e1b624d0 JG |
2243 | if (ret) { |
2244 | ret = -LTTNG_ERR_INVALID; | |
2245 | goto end; | |
2246 | } | |
d7ba1388 | 2247 | |
e1b624d0 JG |
2248 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2249 | end: | |
2250 | return ret; | |
d7ba1388 MD |
2251 | } |
2252 | ||
9f19cc17 | 2253 | /* |
9ae110e2 JG |
2254 | * Ask the session daemon for all available domains of a session. |
2255 | * Sets the contents of the domains array. | |
2256 | * Returns the number of lttng_domain entries in domains; | |
2257 | * on error, returns a negative value. | |
9f19cc17 | 2258 | */ |
330be774 | 2259 | int lttng_list_domains(const char *session_name, |
cd80958d | 2260 | struct lttng_domain **domains) |
9f19cc17 DG |
2261 | { |
2262 | int ret; | |
cd80958d DG |
2263 | struct lttcomm_session_msg lsm; |
2264 | ||
330be774 | 2265 | if (session_name == NULL) { |
e1b624d0 JG |
2266 | ret = -LTTNG_ERR_INVALID; |
2267 | goto error; | |
cd80958d | 2268 | } |
9f19cc17 | 2269 | |
53efb85a | 2270 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2271 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2272 | ||
e1b624d0 | 2273 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2274 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2275 | if (ret) { |
2276 | ret = -LTTNG_ERR_INVALID; | |
2277 | goto error; | |
2278 | } | |
cd80958d | 2279 | |
cac3069d | 2280 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2281 | if (ret < 0) { |
e1b624d0 | 2282 | goto error; |
9f19cc17 DG |
2283 | } |
2284 | ||
2285 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2286 | error: |
2287 | return ret; | |
9f19cc17 DG |
2288 | } |
2289 | ||
2290 | /* | |
9ae110e2 JG |
2291 | * Ask the session daemon for all available channels of a session. |
2292 | * Sets the contents of the channels array. | |
2293 | * Returns the number of lttng_channel entries in channels; | |
2294 | * on error, returns a negative value. | |
9f19cc17 | 2295 | */ |
cd80958d DG |
2296 | int lttng_list_channels(struct lttng_handle *handle, |
2297 | struct lttng_channel **channels) | |
9f19cc17 | 2298 | { |
714363d3 | 2299 | int ret, total_payload_received; |
cd80958d | 2300 | struct lttcomm_session_msg lsm; |
714363d3 JR |
2301 | char *reception_buffer = NULL; |
2302 | size_t cmd_header_len = 0; | |
2303 | struct lttcomm_list_command_header *cmd_header = NULL; | |
2304 | struct lttng_dynamic_buffer tmp_buffer; | |
2305 | ||
2306 | lttng_dynamic_buffer_init(&tmp_buffer); | |
cd80958d | 2307 | |
9d697d3d | 2308 | if (handle == NULL) { |
53e367f9 JG |
2309 | ret = -LTTNG_ERR_INVALID; |
2310 | goto end; | |
cd80958d DG |
2311 | } |
2312 | ||
53efb85a | 2313 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2314 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
e1b624d0 | 2315 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2316 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2317 | if (ret) { |
2318 | ret = -LTTNG_ERR_INVALID; | |
2319 | goto end; | |
2320 | } | |
9f19cc17 | 2321 | |
60160d2a | 2322 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2323 | |
714363d3 JR |
2324 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
2325 | (void **) &reception_buffer, (void **) &cmd_header, | |
2326 | &cmd_header_len); | |
9f19cc17 | 2327 | if (ret < 0) { |
53e367f9 JG |
2328 | goto end; |
2329 | } | |
2330 | ||
714363d3 JR |
2331 | total_payload_received = ret; |
2332 | ||
2333 | if (cmd_header_len != sizeof(*cmd_header)) { | |
2334 | ret = -LTTNG_ERR_FATAL; | |
53e367f9 | 2335 | goto end; |
9f19cc17 DG |
2336 | } |
2337 | ||
714363d3 JR |
2338 | if (!cmd_header) { |
2339 | ret = LTTNG_ERR_UNK; | |
2340 | goto end; | |
2341 | } | |
2342 | ||
2343 | if (cmd_header->count > INT_MAX) { | |
2344 | ret = -LTTNG_ERR_OVERFLOW; | |
2345 | goto end; | |
2346 | } | |
53e367f9 | 2347 | |
714363d3 JR |
2348 | { |
2349 | enum lttng_error_code ret_code; | |
2350 | const struct lttng_buffer_view events_view = | |
2351 | lttng_buffer_view_init(reception_buffer, 0, | |
2352 | total_payload_received); | |
2353 | ||
2354 | ret_code = lttng_channels_create_and_flatten_from_buffer( | |
2355 | &events_view, cmd_header->count, channels); | |
2356 | if (ret_code != LTTNG_OK) { | |
2357 | ret = -ret_code; | |
2358 | goto end; | |
2359 | } | |
53e367f9 JG |
2360 | } |
2361 | ||
714363d3 | 2362 | ret = (int) cmd_header->count; |
53e367f9 | 2363 | end: |
714363d3 JR |
2364 | free(cmd_header); |
2365 | free(reception_buffer); | |
53e367f9 | 2366 | return ret; |
9f19cc17 DG |
2367 | } |
2368 | ||
2369 | /* | |
9ae110e2 JG |
2370 | * Ask the session daemon for all available events of a session channel. |
2371 | * Sets the contents of the events array. | |
2372 | * Returns the number of lttng_event entries in events; | |
2373 | * on error, returns a negative value. | |
9f19cc17 | 2374 | */ |
cd80958d DG |
2375 | int lttng_list_events(struct lttng_handle *handle, |
2376 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2377 | { |
2378 | int ret; | |
e368fb43 | 2379 | struct lttcomm_session_msg lsm = {}; |
fe5e9e65 | 2380 | struct lttng_payload reply; |
e368fb43 JG |
2381 | struct lttng_payload_view lsm_view = |
2382 | lttng_payload_view_init_from_buffer( | |
2383 | (const char *) &lsm, 0, sizeof(lsm)); | |
fe5e9e65 | 2384 | unsigned int nb_events = 0; |
9f19cc17 | 2385 | |
fe5e9e65 | 2386 | /* Safety check. An handle and channel name are mandatory. */ |
9d697d3d | 2387 | if (handle == NULL || channel_name == NULL) { |
e368fb43 JG |
2388 | ret = -LTTNG_ERR_INVALID; |
2389 | goto end; | |
cd80958d DG |
2390 | } |
2391 | ||
fe5e9e65 | 2392 | lttng_payload_init(&reply); |
e368fb43 | 2393 | |
fe5e9e65 | 2394 | /* Initialize command parameters. */ |
cd80958d | 2395 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
e1b624d0 | 2396 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2397 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2398 | if (ret) { |
2399 | ret = -LTTNG_ERR_INVALID; | |
2400 | goto end; | |
2401 | } | |
2402 | ||
2403 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2404 | sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2405 | if (ret) { |
2406 | ret = -LTTNG_ERR_INVALID; | |
2407 | goto end; | |
2408 | } | |
2409 | ||
60160d2a | 2410 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2411 | |
fe5e9e65 JR |
2412 | /* Execute command against the session daemon. */ |
2413 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
9f19cc17 | 2414 | if (ret < 0) { |
de453daa | 2415 | goto end; |
9f19cc17 DG |
2416 | } |
2417 | ||
e368fb43 | 2418 | { |
fe5e9e65 JR |
2419 | const struct lttcomm_list_command_header *cmd_reply_header = |
2420 | NULL; | |
2421 | const struct lttng_payload_view cmd_reply_header_view = | |
2422 | lttng_payload_view_from_payload(&reply, 0, | |
2423 | sizeof(*cmd_reply_header)); | |
2424 | ||
2425 | if (!lttng_payload_view_is_valid(&cmd_reply_header_view)) { | |
2426 | ret = -LTTNG_ERR_INVALID_PROTOCOL; | |
2427 | goto end; | |
56f0bc67 | 2428 | } |
b4e3ceb9 | 2429 | |
fe5e9e65 JR |
2430 | cmd_reply_header = (const struct lttcomm_list_command_header *) |
2431 | cmd_reply_header_view.buffer | |
2432 | .data; | |
2433 | if (cmd_reply_header->count > INT_MAX) { | |
2434 | ret = -LTTNG_ERR_OVERFLOW; | |
2435 | goto end; | |
2436 | } | |
56f0bc67 | 2437 | |
fe5e9e65 | 2438 | nb_events = (unsigned int) cmd_reply_header->count; |
56f0bc67 | 2439 | } |
de453daa | 2440 | |
e368fb43 | 2441 | { |
fe5e9e65 JR |
2442 | enum lttng_error_code ret_code; |
2443 | struct lttng_payload_view cmd_reply_payload = lttng_payload_view_from_payload( | |
2444 | &reply, | |
2445 | sizeof(struct lttcomm_list_command_header), -1); | |
56f0bc67 | 2446 | |
fe5e9e65 JR |
2447 | ret_code = lttng_events_create_and_flatten_from_payload( |
2448 | &cmd_reply_payload, nb_events, events); | |
2449 | if (ret_code != LTTNG_OK) { | |
2450 | ret = -((int) ret_code); | |
2451 | goto end; | |
56f0bc67 | 2452 | } |
de453daa JG |
2453 | } |
2454 | ||
de453daa JG |
2455 | ret = (int) nb_events; |
2456 | end: | |
fe5e9e65 | 2457 | lttng_payload_reset(&reply); |
b4e3ceb9 | 2458 | return ret; |
9f19cc17 DG |
2459 | } |
2460 | ||
fac6795d | 2461 | /* |
1c8d13c8 TD |
2462 | * Sets the tracing_group variable with name. |
2463 | * This function allocates memory pointed to by tracing_group. | |
2464 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2465 | */ |
2466 | int lttng_set_tracing_group(const char *name) | |
2467 | { | |
d1892e1a | 2468 | char *new_group; |
9d697d3d | 2469 | if (name == NULL) { |
2f70b271 | 2470 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2471 | } |
2472 | ||
d1892e1a | 2473 | if (asprintf(&new_group, "%s", name) < 0) { |
2f70b271 | 2474 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2475 | } |
2476 | ||
d1892e1a JR |
2477 | free(tracing_group); |
2478 | tracing_group = new_group; | |
2479 | new_group = NULL; | |
2480 | ||
fac6795d DG |
2481 | return 0; |
2482 | } | |
2483 | ||
cd80958d | 2484 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2485 | struct lttng_calibrate *calibrate) |
2486 | { | |
b812e5ca PP |
2487 | /* |
2488 | * This command was removed in LTTng 2.9. | |
2489 | */ | |
2490 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2491 | } |
2492 | ||
5edd7e09 DG |
2493 | /* |
2494 | * Set default channel attributes. | |
441c16a7 | 2495 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2496 | */ |
2497 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2498 | struct lttng_channel_attr *attr) | |
2499 | { | |
294851b0 | 2500 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2501 | |
5edd7e09 DG |
2502 | /* Safety check */ |
2503 | if (attr == NULL || domain == NULL) { | |
2504 | return; | |
2505 | } | |
2506 | ||
714363d3 | 2507 | /* Save the pointer for later use */ |
294851b0 | 2508 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2509 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2510 | ||
0a9c6494 DG |
2511 | /* Same for all domains. */ |
2512 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2513 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2514 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2515 | ||
5edd7e09 DG |
2516 | switch (domain->type) { |
2517 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2518 | attr->switch_timer_interval = |
2519 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2520 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2521 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2522 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2523 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
2524 | break; | |
2525 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2526 | switch (domain->buf_type) { |
2527 | case LTTNG_BUFFER_PER_UID: | |
2528 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2529 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2530 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2531 | attr->switch_timer_interval = |
2532 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2533 | attr->read_timer_interval = | |
2534 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2535 | break; |
2536 | case LTTNG_BUFFER_PER_PID: | |
2537 | default: | |
2538 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2539 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2540 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2541 | attr->switch_timer_interval = |
2542 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2543 | attr->read_timer_interval = | |
2544 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2545 | break; |
2546 | } | |
5edd7e09 | 2547 | default: |
441c16a7 | 2548 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2549 | break; |
2550 | } | |
cf0bcb51 | 2551 | |
714363d3 JR |
2552 | if (extended) { |
2553 | lttng_channel_set_default_extended_attr(domain, extended); | |
2554 | } | |
2555 | ||
2556 | /* Reassign the extended pointer. */ | |
cf0bcb51 | 2557 | attr->extended.ptr = extended; |
5edd7e09 DG |
2558 | } |
2559 | ||
5ba3702f JG |
2560 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2561 | uint64_t *discarded_events) | |
2562 | { | |
2563 | int ret = 0; | |
cf0bcb51 | 2564 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2565 | |
2566 | if (!channel || !discarded_events) { | |
2567 | ret = -LTTNG_ERR_INVALID; | |
2568 | goto end; | |
2569 | } | |
2570 | ||
2571 | chan_ext = channel->attr.extended.ptr; | |
2572 | if (!chan_ext) { | |
2573 | /* | |
2574 | * This can happen since the lttng_channel structure is | |
2575 | * used for other tasks where this pointer is never set. | |
2576 | */ | |
2577 | *discarded_events = 0; | |
2578 | goto end; | |
2579 | } | |
2580 | ||
2581 | *discarded_events = chan_ext->discarded_events; | |
2582 | end: | |
2583 | return ret; | |
2584 | } | |
2585 | ||
2586 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2587 | uint64_t *lost_packets) | |
2588 | { | |
2589 | int ret = 0; | |
cf0bcb51 | 2590 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2591 | |
2592 | if (!channel || !lost_packets) { | |
2593 | ret = -LTTNG_ERR_INVALID; | |
2594 | goto end; | |
2595 | } | |
2596 | ||
2597 | chan_ext = channel->attr.extended.ptr; | |
2598 | if (!chan_ext) { | |
2599 | /* | |
2600 | * This can happen since the lttng_channel structure is | |
2601 | * used for other tasks where this pointer is never set. | |
2602 | */ | |
2603 | *lost_packets = 0; | |
2604 | goto end; | |
2605 | } | |
2606 | ||
2607 | *lost_packets = chan_ext->lost_packets; | |
2608 | end: | |
2609 | return ret; | |
2610 | } | |
2611 | ||
cf0bcb51 JG |
2612 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2613 | uint64_t *monitor_timer_interval) | |
2614 | { | |
2615 | int ret = 0; | |
2616 | ||
2617 | if (!chan || !monitor_timer_interval) { | |
2618 | ret = -LTTNG_ERR_INVALID; | |
2619 | goto end; | |
2620 | } | |
2621 | ||
2622 | if (!chan->attr.extended.ptr) { | |
2623 | ret = -LTTNG_ERR_INVALID; | |
2624 | goto end; | |
2625 | } | |
2626 | ||
2627 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2628 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2629 | end: | |
2630 | return ret; | |
2631 | } | |
2632 | ||
2633 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2634 | uint64_t monitor_timer_interval) | |
2635 | { | |
2636 | int ret = 0; | |
2637 | ||
2638 | if (!chan || !chan->attr.extended.ptr) { | |
2639 | ret = -LTTNG_ERR_INVALID; | |
2640 | goto end; | |
2641 | } | |
2642 | ||
2643 | ((struct lttng_channel_extended *) | |
2644 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2645 | monitor_timer_interval; | |
2646 | end: | |
2647 | return ret; | |
2648 | } | |
2649 | ||
491d1539 MD |
2650 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2651 | int64_t *blocking_timeout) | |
2652 | { | |
2653 | int ret = 0; | |
2654 | ||
2655 | if (!chan || !blocking_timeout) { | |
2656 | ret = -LTTNG_ERR_INVALID; | |
2657 | goto end; | |
2658 | } | |
2659 | ||
2660 | if (!chan->attr.extended.ptr) { | |
2661 | ret = -LTTNG_ERR_INVALID; | |
2662 | goto end; | |
2663 | } | |
2664 | ||
2665 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2666 | chan->attr.extended.ptr)->blocking_timeout; | |
2667 | end: | |
2668 | return ret; | |
2669 | } | |
2670 | ||
2671 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2672 | int64_t blocking_timeout) | |
2673 | { | |
2674 | int ret = 0; | |
2675 | int64_t msec_timeout; | |
2676 | ||
2677 | if (!chan || !chan->attr.extended.ptr) { | |
2678 | ret = -LTTNG_ERR_INVALID; | |
2679 | goto end; | |
2680 | } | |
2681 | ||
2682 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2683 | ret = -LTTNG_ERR_INVALID; | |
2684 | goto end; | |
2685 | } | |
2686 | ||
2687 | /* | |
2688 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2689 | * us to accept a narrower range of values (msecs expressed as a signed | |
2690 | * 32-bit integer). | |
2691 | */ | |
2692 | msec_timeout = blocking_timeout / 1000; | |
2693 | if (msec_timeout != (int32_t) msec_timeout) { | |
2694 | ret = -LTTNG_ERR_INVALID; | |
2695 | goto end; | |
2696 | } | |
2697 | ||
2698 | ((struct lttng_channel_extended *) | |
2699 | chan->attr.extended.ptr)->blocking_timeout = | |
2700 | blocking_timeout; | |
2701 | end: | |
2702 | return ret; | |
2703 | } | |
2704 | ||
fac6795d | 2705 | /* |
2269e89e | 2706 | * Check if session daemon is alive. |
fac6795d | 2707 | * |
2269e89e | 2708 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2709 | * On error returns a negative value. |
fac6795d | 2710 | */ |
947308c4 | 2711 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2712 | { |
2713 | int ret; | |
2714 | ||
2715 | ret = set_session_daemon_path(); | |
2716 | if (ret < 0) { | |
9ae110e2 | 2717 | /* Error. */ |
fac6795d DG |
2718 | return ret; |
2719 | } | |
2720 | ||
9d035200 | 2721 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2722 | /* |
9ae110e2 JG |
2723 | * No socket path set. Weird error which means the constructor |
2724 | * was not called. | |
2f70b271 DG |
2725 | */ |
2726 | assert(0); | |
fac6795d DG |
2727 | } |
2728 | ||
2269e89e | 2729 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2730 | if (ret < 0) { |
9ae110e2 | 2731 | /* Not alive. */ |
7d8234d9 MD |
2732 | return 0; |
2733 | } | |
7d8234d9 | 2734 | |
9ae110e2 | 2735 | /* Is alive. */ |
947308c4 | 2736 | return 1; |
fac6795d DG |
2737 | } |
2738 | ||
00e2e675 | 2739 | /* |
a4b92340 | 2740 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2741 | * |
2742 | * Return 0 on success, else a negative value. | |
2743 | */ | |
a4b92340 DG |
2744 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2745 | const char *control_url, const char *data_url) | |
00e2e675 | 2746 | { |
3dd05a85 | 2747 | int ret; |
a4b92340 | 2748 | ssize_t size; |
00e2e675 | 2749 | struct lttcomm_session_msg lsm; |
a4b92340 | 2750 | struct lttng_uri *uris = NULL; |
00e2e675 | 2751 | |
a4b92340 | 2752 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
e1b624d0 JG |
2753 | ret = -LTTNG_ERR_INVALID; |
2754 | goto error; | |
00e2e675 DG |
2755 | } |
2756 | ||
a4b92340 DG |
2757 | memset(&lsm, 0, sizeof(lsm)); |
2758 | ||
00e2e675 DG |
2759 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2760 | ||
e1b624d0 | 2761 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 2762 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2763 | if (ret) { |
2764 | ret = -LTTNG_ERR_INVALID; | |
2765 | goto error; | |
2766 | } | |
2767 | ||
60160d2a | 2768 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2769 | |
bc894455 | 2770 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2771 | if (size < 0) { |
e1b624d0 JG |
2772 | ret = -LTTNG_ERR_INVALID; |
2773 | goto error; | |
a4b92340 DG |
2774 | } |
2775 | ||
2776 | lsm.u.uri.size = size; | |
00e2e675 | 2777 | |
795a978d | 2778 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2779 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2780 | |
2781 | free(uris); | |
e1b624d0 | 2782 | error: |
3dd05a85 | 2783 | return ret; |
00e2e675 DG |
2784 | } |
2785 | ||
2786 | /* | |
9c6bda17 | 2787 | * [OBSOLETE] |
00e2e675 | 2788 | */ |
2ec40111 | 2789 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2790 | int lttng_enable_consumer(struct lttng_handle *handle) |
2791 | { | |
785d2d0d | 2792 | return -ENOSYS; |
00e2e675 DG |
2793 | } |
2794 | ||
2795 | /* | |
9c6bda17 | 2796 | * [OBSOLETE] |
00e2e675 | 2797 | */ |
2ec40111 | 2798 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2799 | int lttng_disable_consumer(struct lttng_handle *handle) |
2800 | { | |
785d2d0d | 2801 | return -ENOSYS; |
00e2e675 DG |
2802 | } |
2803 | ||
07424f16 | 2804 | /* |
b178f53e | 2805 | * [OBSOLETE] |
07424f16 | 2806 | */ |
2ec40111 SM |
2807 | int _lttng_create_session_ext(const char *name, const char *url, |
2808 | const char *datetime); | |
07424f16 DG |
2809 | int _lttng_create_session_ext(const char *name, const char *url, |
2810 | const char *datetime) | |
2811 | { | |
b178f53e | 2812 | return -ENOSYS; |
07424f16 DG |
2813 | } |
2814 | ||
806e2684 DG |
2815 | /* |
2816 | * For a given session name, this call checks if the data is ready to be read | |
2817 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2818 | * any readers. | |
2819 | */ | |
6d805429 | 2820 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2821 | { |
2822 | int ret; | |
2823 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2824 | uint8_t *pending = NULL; |
806e2684 DG |
2825 | |
2826 | if (session_name == NULL) { | |
2827 | return -LTTNG_ERR_INVALID; | |
2828 | } | |
2829 | ||
53efb85a | 2830 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2831 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2832 | |
e1b624d0 | 2833 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2834 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2835 | if (ret) { |
2836 | ret = -LTTNG_ERR_INVALID; | |
2837 | goto end; | |
2838 | } | |
806e2684 | 2839 | |
f6151c55 JG |
2840 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2841 | if (ret < 0) { | |
2842 | goto end; | |
2843 | } else if (ret != 1) { | |
2844 | /* Unexpected payload size */ | |
2845 | ret = -LTTNG_ERR_INVALID; | |
2846 | goto end; | |
e848d36d JG |
2847 | } else if (!pending) { |
2848 | /* Internal error. */ | |
2849 | ret = -LTTNG_ERR_UNK; | |
2850 | goto end; | |
806e2684 DG |
2851 | } |
2852 | ||
f6151c55 JG |
2853 | ret = (int) *pending; |
2854 | end: | |
2855 | free(pending); | |
806e2684 DG |
2856 | return ret; |
2857 | } | |
2858 | ||
93ec662e JD |
2859 | /* |
2860 | * Regenerate the metadata for a session. | |
2861 | * Return 0 on success, a negative error code on error. | |
2862 | */ | |
eded6438 | 2863 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2864 | { |
2865 | int ret; | |
2866 | struct lttcomm_session_msg lsm; | |
2867 | ||
2868 | if (!session_name) { | |
2869 | ret = -LTTNG_ERR_INVALID; | |
2870 | goto end; | |
2871 | } | |
2872 | ||
2873 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2874 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 2875 | |
e1b624d0 | 2876 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 2877 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2878 | if (ret) { |
2879 | ret = -LTTNG_ERR_INVALID; | |
2880 | goto end; | |
2881 | } | |
93ec662e JD |
2882 | |
2883 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2884 | if (ret < 0) { | |
2885 | goto end; | |
2886 | } | |
2887 | ||
2888 | ret = 0; | |
2889 | end: | |
2890 | return ret; | |
2891 | } | |
2892 | ||
eded6438 JD |
2893 | /* |
2894 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2895 | */ | |
2896 | int lttng_metadata_regenerate(const char *session_name) | |
2897 | { | |
2898 | return lttng_regenerate_metadata(session_name); | |
2899 | } | |
2900 | ||
c2561365 JD |
2901 | /* |
2902 | * Regenerate the statedump of a session. | |
2903 | * Return 0 on success, a negative error code on error. | |
2904 | */ | |
2905 | int lttng_regenerate_statedump(const char *session_name) | |
2906 | { | |
2907 | int ret; | |
2908 | struct lttcomm_session_msg lsm; | |
2909 | ||
2910 | if (!session_name) { | |
2911 | ret = -LTTNG_ERR_INVALID; | |
2912 | goto end; | |
2913 | } | |
2914 | ||
2915 | memset(&lsm, 0, sizeof(lsm)); | |
2916 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2917 | ||
e1b624d0 | 2918 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 2919 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2920 | if (ret) { |
2921 | ret = -LTTNG_ERR_INVALID; | |
2922 | goto end; | |
2923 | } | |
c2561365 JD |
2924 | |
2925 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2926 | if (ret < 0) { | |
2927 | goto end; | |
2928 | } | |
2929 | ||
2930 | ret = 0; | |
2931 | end: | |
2932 | return ret; | |
2933 | } | |
2934 | ||
a5c2d2a7 JG |
2935 | static |
2936 | int _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, | |
2937 | bool generate_name) | |
a58c490f JG |
2938 | { |
2939 | int ret; | |
99608320 JR |
2940 | struct lttcomm_session_msg lsm = { |
2941 | .cmd_type = LTTNG_REGISTER_TRIGGER, | |
a5c2d2a7 | 2942 | .u.trigger.is_trigger_anonymous = !name && !generate_name, |
99608320 JR |
2943 | }; |
2944 | struct lttcomm_session_msg *message_lsm; | |
2945 | struct lttng_payload message; | |
2946 | struct lttng_payload reply; | |
242388e4 | 2947 | struct lttng_trigger *reply_trigger = NULL; |
9124c630 | 2948 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
2949 | const struct lttng_credentials user_creds = { |
2950 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
2951 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
2952 | }; | |
a5c2d2a7 JG |
2953 | const char *unused_trigger_name = NULL; |
2954 | enum lttng_trigger_status trigger_status; | |
99608320 JR |
2955 | |
2956 | lttng_payload_init(&message); | |
2957 | lttng_payload_init(&reply); | |
a58c490f JG |
2958 | |
2959 | if (!trigger) { | |
2960 | ret = -LTTNG_ERR_INVALID; | |
2961 | goto end; | |
2962 | } | |
2963 | ||
a5c2d2a7 JG |
2964 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
2965 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
2966 | /* Re-using already registered trigger. */ | |
2967 | ret = -LTTNG_ERR_INVALID; | |
2968 | goto end; | |
2969 | } | |
2970 | ||
2971 | if (name) { | |
2972 | trigger_status = lttng_trigger_set_name(trigger, name); | |
2973 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
2974 | ret = -LTTNG_ERR_NOMEM; | |
2975 | goto end; | |
2976 | } | |
2977 | } | |
2978 | ||
64eafdf6 JR |
2979 | if (!trigger->creds.uid.is_set) { |
2980 | /* Use the client's credentials as the trigger credentials. */ | |
2981 | lttng_trigger_set_credentials(trigger, &user_creds); | |
2982 | } else { | |
2983 | /* | |
2984 | * Validate that either the current trigger credentials and the | |
2985 | * client credentials are identical or that the current user is | |
2986 | * root. The root user can register, unregister triggers for | |
2987 | * himself and other users. | |
2988 | * | |
2989 | * This check is also present on the sessiond side, using the | |
2990 | * credentials passed on the socket. These check are all | |
2991 | * "safety" checks. | |
2992 | */ | |
2993 | const struct lttng_credentials *trigger_creds = | |
2994 | lttng_trigger_get_credentials(trigger); | |
2995 | ||
2996 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
2997 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
2998 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 2999 | goto end_unset_name; |
64eafdf6 JR |
3000 | } |
3001 | } | |
3002 | } | |
3003 | ||
a58c490f | 3004 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3005 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 3006 | goto end_unset_name; |
a58c490f JG |
3007 | } |
3008 | ||
9124c630 JR |
3009 | domain_type = lttng_trigger_get_underlying_domain_type_restriction( |
3010 | trigger); | |
3011 | ||
3012 | lsm.domain.type = domain_type; | |
3013 | ||
97285430 JG |
3014 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3015 | if (ret) { | |
3016 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 3017 | goto end_unset_name; |
97285430 | 3018 | } |
99608320 | 3019 | |
99608320 | 3020 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3021 | if (ret < 0) { |
a58c490f | 3022 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3023 | goto end_unset_name; |
a58c490f JG |
3024 | } |
3025 | ||
b22f4f54 JG |
3026 | /* |
3027 | * This is needed to populate the trigger object size for the command | |
3028 | * header. | |
3029 | */ | |
3030 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3031 | ||
99608320 JR |
3032 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3033 | ||
3034 | { | |
3035 | struct lttng_payload_view message_view = | |
3036 | lttng_payload_view_from_payload( | |
3037 | &message, 0, -1); | |
3038 | ||
3039 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3040 | &message_view); | |
3041 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3042 | if (ret < 0) { | |
a5c2d2a7 | 3043 | goto end_unset_name; |
99608320 JR |
3044 | } |
3045 | } | |
3046 | ||
242388e4 JR |
3047 | { |
3048 | struct lttng_payload_view reply_view = | |
3049 | lttng_payload_view_from_payload( | |
3050 | &reply, 0, reply.buffer.size); | |
3051 | ||
3052 | ret = lttng_trigger_create_from_payload( | |
3053 | &reply_view, &reply_trigger); | |
3054 | if (ret < 0) { | |
a5c2d2a7 JG |
3055 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3056 | goto end_unset_name; | |
242388e4 JR |
3057 | } |
3058 | } | |
3059 | ||
a5c2d2a7 JG |
3060 | if (name || generate_name) { |
3061 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3062 | if (ret < 0) { | |
3063 | ret = -LTTNG_ERR_NOMEM; | |
3064 | goto end; | |
3065 | } | |
242388e4 JR |
3066 | } |
3067 | ||
99608320 | 3068 | ret = 0; |
a5c2d2a7 JG |
3069 | goto end; |
3070 | ||
3071 | end_unset_name: | |
3072 | trigger_status = lttng_trigger_set_name(trigger, NULL); | |
3073 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3074 | ret = -LTTNG_ERR_UNK; | |
3075 | } | |
a58c490f | 3076 | end: |
99608320 JR |
3077 | lttng_payload_reset(&message); |
3078 | lttng_payload_reset(&reply); | |
242388e4 | 3079 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3080 | return ret; |
3081 | } | |
3082 | ||
a5c2d2a7 JG |
3083 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3084 | { | |
3085 | /* Register an anonymous trigger. */ | |
3086 | return _lttng_register_trigger(trigger, NULL, false); | |
3087 | } | |
3088 | ||
3089 | enum lttng_error_code lttng_register_trigger_with_name( | |
3090 | struct lttng_trigger *trigger, const char *name) | |
3091 | { | |
3092 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3093 | ||
3094 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3095 | } | |
3096 | ||
3097 | enum lttng_error_code lttng_register_trigger_with_automatic_name( | |
3098 | struct lttng_trigger *trigger) | |
3099 | { | |
3100 | const int ret = _lttng_register_trigger(trigger, false, true); | |
3101 | ||
3102 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3103 | } | |
3104 | ||
b99a0cb3 JG |
3105 | enum lttng_error_code lttng_error_query_execute( |
3106 | const struct lttng_error_query *query, | |
3107 | const struct lttng_endpoint *endpoint, | |
3108 | struct lttng_error_query_results **results) | |
3109 | { | |
3110 | int ret; | |
3111 | enum lttng_error_code ret_code; | |
3112 | struct lttcomm_session_msg lsm = { | |
3113 | .cmd_type = LTTNG_EXECUTE_ERROR_QUERY, | |
3114 | }; | |
3115 | struct lttng_payload message; | |
3116 | struct lttng_payload reply; | |
3117 | struct lttcomm_session_msg *message_lsm; | |
3118 | ||
3119 | lttng_payload_init(&message); | |
3120 | lttng_payload_init(&reply); | |
3121 | ||
3122 | if (!query || !results) { | |
3123 | ret_code = LTTNG_ERR_INVALID; | |
3124 | goto end; | |
3125 | } | |
3126 | ||
3127 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3128 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3129 | goto end; | |
3130 | } | |
3131 | ||
3132 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3133 | if (ret) { | |
3134 | ret_code = LTTNG_ERR_NOMEM; | |
3135 | goto end; | |
3136 | } | |
3137 | ||
3138 | ret = lttng_error_query_serialize(query, &message); | |
3139 | if (ret) { | |
3140 | ret_code = LTTNG_ERR_UNK; | |
3141 | goto end; | |
3142 | } | |
3143 | ||
3144 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3145 | message_lsm->u.error_query.length = | |
3146 | (uint32_t) message.buffer.size - sizeof(lsm); | |
3147 | ||
3148 | { | |
3149 | struct lttng_payload_view message_view = | |
3150 | lttng_payload_view_from_payload( | |
3151 | &message, 0, -1); | |
3152 | ||
3153 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3154 | &message_view); | |
3155 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3156 | if (ret < 0) { | |
3157 | ret_code = -ret; | |
3158 | goto end; | |
3159 | } | |
3160 | } | |
3161 | ||
3162 | { | |
3163 | ssize_t reply_create_ret; | |
3164 | struct lttng_payload_view reply_view = | |
3165 | lttng_payload_view_from_payload( | |
3166 | &reply, 0, reply.buffer.size); | |
3167 | ||
3168 | reply_create_ret = lttng_error_query_results_create_from_payload( | |
3169 | &reply_view, results); | |
3170 | if (reply_create_ret < 0) { | |
3171 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3172 | goto end; | |
3173 | } | |
3174 | } | |
3175 | ||
3176 | ret_code = LTTNG_OK; | |
3177 | end: | |
3178 | lttng_payload_reset(&message); | |
3179 | lttng_payload_reset(&reply); | |
3180 | return ret_code; | |
3181 | } | |
3182 | ||
b61776fb | 3183 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3184 | { |
3185 | int ret; | |
3186 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3187 | struct lttcomm_session_msg *message_lsm; |
3188 | struct lttng_payload message; | |
3189 | struct lttng_payload reply; | |
b61776fb | 3190 | struct lttng_trigger *copy = NULL; |
64eafdf6 JR |
3191 | const struct lttng_credentials user_creds = { |
3192 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3193 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3194 | }; | |
99608320 JR |
3195 | |
3196 | lttng_payload_init(&message); | |
3197 | lttng_payload_init(&reply); | |
a58c490f JG |
3198 | |
3199 | if (!trigger) { | |
3200 | ret = -LTTNG_ERR_INVALID; | |
3201 | goto end; | |
3202 | } | |
3203 | ||
b61776fb SM |
3204 | copy = lttng_trigger_copy(trigger); |
3205 | if (!copy) { | |
3206 | ret = -LTTNG_ERR_UNK; | |
3207 | goto end; | |
3208 | } | |
3209 | ||
3210 | if (!copy->creds.uid.is_set) { | |
3211 | /* Use the client credentials as the trigger credentials */ | |
3212 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3213 | } else { |
3214 | /* | |
3215 | * Validate that either the current trigger credentials and the | |
3216 | * client credentials are identical or that the current user is | |
3217 | * root. The root user can register, unregister triggers for | |
3218 | * himself and other users. | |
3219 | * | |
3220 | * This check is also present on the sessiond side, using the | |
3221 | * credentials passed on the socket. These check are all | |
3222 | * "safety" checks. | |
3223 | */ | |
3224 | const struct lttng_credentials *trigger_creds = | |
b61776fb | 3225 | lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3226 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3227 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3228 | ret = -LTTNG_ERR_EPERM; | |
3229 | goto end; | |
3230 | } | |
3231 | } | |
3232 | } | |
3233 | ||
b61776fb | 3234 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3235 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3236 | goto end; |
3237 | } | |
3238 | ||
99608320 JR |
3239 | memset(&lsm, 0, sizeof(lsm)); |
3240 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3241 | ||
97285430 JG |
3242 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3243 | if (ret) { | |
3244 | ret = -LTTNG_ERR_NOMEM; | |
3245 | goto end; | |
3246 | } | |
99608320 | 3247 | |
b61776fb | 3248 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3249 | if (ret < 0) { |
a58c490f JG |
3250 | ret = -LTTNG_ERR_UNK; |
3251 | goto end; | |
3252 | } | |
3253 | ||
b0a79813 FD |
3254 | /* |
3255 | * This is needed to populate the trigger object size for the command | |
3256 | * header and number of fds sent. | |
3257 | */ | |
3258 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3259 | ||
99608320 JR |
3260 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3261 | ||
3262 | { | |
3263 | struct lttng_payload_view message_view = | |
3264 | lttng_payload_view_from_payload( | |
3265 | &message, 0, -1); | |
3266 | ||
3267 | /* | |
3268 | * Update the message header with the number of fd that will be | |
3269 | * sent. | |
3270 | */ | |
3271 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3272 | &message_view); | |
3273 | ||
3274 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3275 | if (ret < 0) { | |
3276 | goto end; | |
3277 | } | |
3278 | } | |
3279 | ||
3280 | ret = 0; | |
a58c490f | 3281 | end: |
b61776fb | 3282 | lttng_trigger_destroy(copy); |
99608320 JR |
3283 | lttng_payload_reset(&message); |
3284 | lttng_payload_reset(&reply); | |
a58c490f JG |
3285 | return ret; |
3286 | } | |
3287 | ||
fbc9f37d JR |
3288 | /* |
3289 | * Ask the session daemon for all registered triggers for the current user. | |
3290 | * | |
3291 | * Allocates and return an lttng_triggers set. | |
3292 | * On error, returns a suitable lttng_error_code. | |
3293 | */ | |
3294 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3295 | { | |
3296 | int ret; | |
3297 | enum lttng_error_code ret_code = LTTNG_OK; | |
3298 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS }; | |
3299 | struct lttng_triggers *local_triggers = NULL; | |
3300 | struct lttng_payload reply; | |
3301 | struct lttng_payload_view lsm_view = | |
3302 | lttng_payload_view_init_from_buffer( | |
3303 | (const char *) &lsm, 0, sizeof(lsm)); | |
3304 | ||
3305 | lttng_payload_init(&reply); | |
3306 | ||
3307 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3308 | if (ret < 0) { | |
3309 | ret_code = (enum lttng_error_code) -ret; | |
3310 | goto end; | |
3311 | } | |
3312 | ||
3313 | { | |
3314 | struct lttng_payload_view reply_view = | |
3315 | lttng_payload_view_from_payload( | |
3316 | &reply, 0, reply.buffer.size); | |
3317 | ||
3318 | ret = lttng_triggers_create_from_payload( | |
3319 | &reply_view, &local_triggers); | |
3320 | if (ret < 0) { | |
3321 | ret_code = LTTNG_ERR_FATAL; | |
3322 | goto end; | |
3323 | } | |
3324 | } | |
3325 | ||
3326 | *triggers = local_triggers; | |
3327 | local_triggers = NULL; | |
3328 | end: | |
3329 | lttng_payload_reset(&reply); | |
3330 | lttng_triggers_destroy(local_triggers); | |
3331 | return ret_code; | |
3332 | } | |
3333 | ||
fac6795d | 3334 | /* |
9ae110e2 | 3335 | * lib constructor. |
fac6795d | 3336 | */ |
b2b89e8a | 3337 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3338 | { |
3339 | /* Set default session group */ | |
bbccc3d2 | 3340 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3341 | } |
49cca668 DG |
3342 | |
3343 | /* | |
9ae110e2 | 3344 | * lib destructor. |
49cca668 | 3345 | */ |
b2b89e8a | 3346 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3347 | { |
3348 | free(tracing_group); | |
3349 | } |