Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
ab5be9fa | 7 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
ab5be9fa | 9 | * SPDX-License-Identifier: LGPL-2.1-only |
82a3637f | 10 | * |
fac6795d DG |
11 | */ |
12 | ||
6c1c0768 | 13 | #define _LGPL_SOURCE |
fac6795d DG |
14 | #include <grp.h> |
15 | #include <stdio.h> | |
16 | #include <stdlib.h> | |
17 | #include <string.h> | |
18 | #include <unistd.h> | |
19 | ||
0ae3cfc6 | 20 | #include <common/bytecode/bytecode.h> |
990570ed | 21 | #include <common/common.h> |
edf4b93e | 22 | #include <common/compat/errno.h> |
15e37663 | 23 | #include <common/compat/string.h> |
990570ed | 24 | #include <common/defaults.h> |
fe489250 | 25 | #include <common/dynamic-array.h> |
b99a0cb3 | 26 | #include <common/dynamic-buffer.h> |
9e620ea7 | 27 | #include <common/payload-view.h> |
b99a0cb3 | 28 | #include <common/payload.h> |
db758600 | 29 | #include <common/sessiond-comm/sessiond-comm.h> |
159b042f | 30 | #include <common/tracker.h> |
fe489250 | 31 | #include <common/unix.h> |
a4b92340 | 32 | #include <common/uri.h> |
feb0f3e5 | 33 | #include <common/utils.h> |
a58c490f | 34 | #include <lttng/channel-internal.h> |
159b042f JG |
35 | #include <lttng/destruction-handle.h> |
36 | #include <lttng/endpoint.h> | |
b99a0cb3 | 37 | #include <lttng/error-query-internal.h> |
de453daa | 38 | #include <lttng/event-internal.h> |
159b042f | 39 | #include <lttng/health-internal.h> |
b99a0cb3 | 40 | #include <lttng/lttng-error.h> |
159b042f | 41 | #include <lttng/lttng.h> |
b178f53e | 42 | #include <lttng/session-descriptor-internal.h> |
159b042f JG |
43 | #include <lttng/session-internal.h> |
44 | #include <lttng/trigger/trigger-internal.h> | |
45 | #include <lttng/userspace-probe-internal.h> | |
fac6795d | 46 | |
b99a0cb3 | 47 | #include "lttng-ctl-helper.h" |
e4d2f27a JR |
48 | #include <common/filter/filter-ast.h> |
49 | #include <common/filter/filter-parser.h> | |
e4d2f27a | 50 | #include <common/filter/memstream.h> |
53a80697 | 51 | |
60160d2a JG |
52 | #define COPY_DOMAIN_PACKED(dst, src) \ |
53 | do { \ | |
54 | struct lttng_domain _tmp_domain; \ | |
55 | \ | |
56 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
57 | dst = _tmp_domain; \ | |
58 | } while (0) | |
53a80697 | 59 | |
fac6795d | 60 | /* Socket to session daemon for communication */ |
3e3665b8 | 61 | static int sessiond_socket = -1; |
fac6795d DG |
62 | static char sessiond_sock_path[PATH_MAX]; |
63 | ||
fac6795d DG |
64 | /* Variables */ |
65 | static char *tracing_group; | |
66 | static int connected; | |
67 | ||
97e19046 DG |
68 | /* Global */ |
69 | ||
70 | /* | |
71 | * Those two variables are used by error.h to silent or control the verbosity of | |
72 | * error message. They are global to the library so application linking with it | |
73 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
74 | */ |
75 | int lttng_opt_quiet; | |
76 | int lttng_opt_verbose; | |
c7e35b03 | 77 | int lttng_opt_mi; |
97e19046 | 78 | |
fac6795d | 79 | /* |
cd80958d | 80 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 81 | * |
cd80958d DG |
82 | * If domain is unknown, default domain will be the kernel. |
83 | */ | |
cac3069d DG |
84 | LTTNG_HIDDEN |
85 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
86 | struct lttng_domain *src) | |
cd80958d DG |
87 | { |
88 | if (src && dst) { | |
89 | switch (src->type) { | |
00e2e675 DG |
90 | case LTTNG_DOMAIN_KERNEL: |
91 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 92 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 93 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 94 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
95 | memcpy(dst, src, sizeof(struct lttng_domain)); |
96 | break; | |
97 | default: | |
98 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 99 | break; |
cd80958d DG |
100 | } |
101 | } | |
102 | } | |
103 | ||
104 | /* | |
105 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 106 | * |
1c8d13c8 TD |
107 | * On success, returns the number of bytes sent (>=0) |
108 | * On error, returns -1 | |
fac6795d | 109 | */ |
cd80958d | 110 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
111 | { |
112 | int ret; | |
113 | ||
114 | if (!connected) { | |
2f70b271 | 115 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 116 | goto end; |
fac6795d DG |
117 | } |
118 | ||
19f912db FD |
119 | DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str(lsm->cmd_type), |
120 | lsm->cmd_type); | |
a4b92340 | 121 | |
be040666 | 122 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 123 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
124 | if (ret < 0) { |
125 | ret = -LTTNG_ERR_FATAL; | |
126 | } | |
e065084a DG |
127 | |
128 | end: | |
129 | return ret; | |
130 | } | |
131 | ||
53a80697 MD |
132 | /* |
133 | * Send var len data to the session daemon. | |
134 | * | |
135 | * On success, returns the number of bytes sent (>=0) | |
136 | * On error, returns -1 | |
137 | */ | |
c2d69327 | 138 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
139 | { |
140 | int ret; | |
141 | ||
142 | if (!connected) { | |
2f70b271 | 143 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
144 | goto end; |
145 | } | |
a4b92340 | 146 | |
53a80697 MD |
147 | if (!data || !len) { |
148 | ret = 0; | |
149 | goto end; | |
150 | } | |
151 | ||
152 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
153 | if (ret < 0) { |
154 | ret = -LTTNG_ERR_FATAL; | |
155 | } | |
53a80697 MD |
156 | |
157 | end: | |
158 | return ret; | |
159 | } | |
160 | ||
a04d53fc FD |
161 | /* |
162 | * Send file descriptors to the session daemon. | |
163 | * | |
164 | * On success, returns the number of bytes sent (>=0) | |
165 | * On error, returns -1 | |
166 | */ | |
167 | static int send_session_fds(const int *fds, size_t nb_fd) | |
168 | { | |
169 | int ret; | |
170 | ||
171 | if (!connected) { | |
172 | ret = -LTTNG_ERR_NO_SESSIOND; | |
173 | goto end; | |
174 | } | |
175 | ||
176 | if (!fds || !nb_fd) { | |
177 | ret = 0; | |
178 | goto end; | |
179 | } | |
180 | ||
181 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
182 | if (ret < 0) { | |
183 | ret = -LTTNG_ERR_FATAL; | |
184 | } | |
185 | ||
186 | end: | |
187 | return ret; | |
188 | } | |
189 | ||
e065084a | 190 | /* |
cd80958d | 191 | * Receive data from the sessiond socket. |
e065084a | 192 | * |
1c8d13c8 | 193 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 194 | * On error, returns a negative lttng_error_code. |
e065084a | 195 | */ |
ca95a216 | 196 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
197 | { |
198 | int ret; | |
199 | ||
a0377dfe | 200 | LTTNG_ASSERT(len > 0); |
bacc41cc | 201 | |
e065084a | 202 | if (!connected) { |
2f70b271 | 203 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 204 | goto end; |
fac6795d DG |
205 | } |
206 | ||
ca95a216 | 207 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
208 | if (ret < 0) { |
209 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
210 | } else if (ret == 0) { |
211 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 212 | } |
fac6795d | 213 | |
e065084a | 214 | end: |
fac6795d DG |
215 | return ret; |
216 | } | |
217 | ||
e368fb43 JG |
218 | /* |
219 | * Receive a payload from the session daemon by appending to an existing | |
220 | * payload. | |
221 | * On success, returns the number of bytes received (>=0) | |
222 | * On error, returns a negative lttng_error_code. | |
223 | */ | |
224 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
225 | { | |
226 | int ret; | |
227 | const size_t original_payload_size = payload->buffer.size; | |
228 | ||
229 | ret = lttng_dynamic_buffer_set_size( | |
230 | &payload->buffer, payload->buffer.size + len); | |
231 | if (ret) { | |
232 | ret = -LTTNG_ERR_NOMEM; | |
233 | goto end; | |
234 | } | |
235 | ||
236 | ret = recv_data_sessiond( | |
237 | payload->buffer.data + original_payload_size, len); | |
238 | end: | |
239 | return ret; | |
240 | } | |
241 | ||
fac6795d | 242 | /* |
9ae110e2 | 243 | * Check if we are in the specified group. |
65beb5ff | 244 | * |
9ae110e2 | 245 | * If yes return 1, else return -1. |
947308c4 | 246 | */ |
6c71277b MD |
247 | LTTNG_HIDDEN |
248 | int lttng_check_tracing_group(void) | |
947308c4 | 249 | { |
28ab59d0 | 250 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
251 | int grp_list_size, grp_id, i; |
252 | int ret = -1; | |
6c71277b | 253 | const char *grp_name = tracing_group; |
947308c4 DG |
254 | |
255 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 256 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 257 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
258 | goto end; |
259 | } | |
260 | ||
261 | /* Get number of supplementary group IDs */ | |
262 | grp_list_size = getgroups(0, NULL); | |
263 | if (grp_list_size < 0) { | |
6f04ed72 | 264 | PERROR("getgroups"); |
947308c4 DG |
265 | goto end; |
266 | } | |
267 | ||
268 | /* Alloc group list of the right size */ | |
3f451dc0 | 269 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 270 | if (!grp_list) { |
6f04ed72 | 271 | PERROR("malloc"); |
00795392 MD |
272 | goto end; |
273 | } | |
947308c4 | 274 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 275 | if (grp_id < 0) { |
6f04ed72 | 276 | PERROR("getgroups"); |
947308c4 DG |
277 | goto free_list; |
278 | } | |
279 | ||
280 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 281 | if (grp_list[i] == tracing_gid) { |
2269e89e | 282 | ret = 1; |
947308c4 DG |
283 | break; |
284 | } | |
285 | } | |
286 | ||
287 | free_list: | |
288 | free(grp_list); | |
289 | ||
290 | end: | |
291 | return ret; | |
292 | } | |
293 | ||
09b72f7a FD |
294 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
295 | { | |
296 | int ret; | |
297 | long num_cpu; | |
298 | size_t best_mem_info; | |
299 | size_t num_bytes_requested_total; | |
300 | ||
301 | /* | |
302 | * Get the number of CPU currently online to compute the amount of | |
303 | * memory needed to create a buffer for every CPU. | |
304 | */ | |
305 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
306 | if (num_cpu == -1) { | |
307 | goto error; | |
308 | } | |
309 | ||
310 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
311 | ||
312 | /* | |
313 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
314 | * reliable estimate we can get but it is only exposed by the kernel | |
315 | * since 3.14. (See Linux kernel commit: | |
316 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
317 | */ | |
318 | ret = utils_get_memory_available(&best_mem_info); | |
319 | if (ret >= 0) { | |
320 | goto success; | |
321 | } | |
322 | ||
323 | /* | |
324 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
325 | * is a sanity check for obvious user error. | |
326 | */ | |
327 | ret = utils_get_memory_total(&best_mem_info); | |
328 | if (ret >= 0) { | |
329 | goto success; | |
330 | } | |
331 | ||
332 | error: | |
333 | return -1; | |
334 | success: | |
335 | return best_mem_info >= num_bytes_requested_total; | |
336 | } | |
337 | ||
947308c4 | 338 | /* |
2269e89e DG |
339 | * Try connect to session daemon with sock_path. |
340 | * | |
341 | * Return 0 on success, else -1 | |
342 | */ | |
343 | static int try_connect_sessiond(const char *sock_path) | |
344 | { | |
345 | int ret; | |
346 | ||
347 | /* If socket exist, we check if the daemon listens for connect. */ | |
348 | ret = access(sock_path, F_OK); | |
349 | if (ret < 0) { | |
350 | /* Not alive */ | |
2f70b271 | 351 | goto error; |
2269e89e DG |
352 | } |
353 | ||
354 | ret = lttcomm_connect_unix_sock(sock_path); | |
355 | if (ret < 0) { | |
9ae110e2 | 356 | /* Not alive. */ |
2f70b271 | 357 | goto error; |
2269e89e DG |
358 | } |
359 | ||
360 | ret = lttcomm_close_unix_sock(ret); | |
361 | if (ret < 0) { | |
6f04ed72 | 362 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
363 | } |
364 | ||
365 | return 0; | |
2f70b271 DG |
366 | |
367 | error: | |
368 | return -1; | |
2269e89e DG |
369 | } |
370 | ||
371 | /* | |
2f70b271 DG |
372 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
373 | * variable. | |
374 | * | |
375 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
376 | * is somehow too long or ENOMEM). | |
947308c4 DG |
377 | */ |
378 | static int set_session_daemon_path(void) | |
379 | { | |
9ae110e2 | 380 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
381 | uid_t uid; |
382 | ||
383 | uid = getuid(); | |
947308c4 | 384 | |
2269e89e DG |
385 | if (uid != 0) { |
386 | /* Are we in the tracing group ? */ | |
6c71277b | 387 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
388 | } |
389 | ||
c295ec41 | 390 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 JG |
391 | const int ret = lttng_strncpy(sessiond_sock_path, |
392 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
393 | sizeof(sessiond_sock_path)); | |
394 | ||
395 | if (ret) { | |
396 | goto error; | |
397 | } | |
08a9c49f | 398 | } |
2269e89e | 399 | |
08a9c49f | 400 | if (uid != 0) { |
c617c0c6 MD |
401 | int ret; |
402 | ||
08a9c49f | 403 | if (in_tgroup) { |
9ae110e2 | 404 | /* Tracing group. */ |
08a9c49f TD |
405 | ret = try_connect_sessiond(sessiond_sock_path); |
406 | if (ret >= 0) { | |
407 | goto end; | |
2269e89e | 408 | } |
08a9c49f | 409 | /* Global session daemon not available... */ |
2269e89e | 410 | } |
08a9c49f TD |
411 | /* ...or not in tracing group (and not root), default */ |
412 | ||
413 | /* | |
9ae110e2 JG |
414 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
415 | * is too small; | |
416 | * With GNU C >= 2.1, snprintf returns the required size | |
417 | * (excluding closing null) | |
08a9c49f TD |
418 | */ |
419 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 420 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 421 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 422 | goto error; |
947308c4 | 423 | } |
947308c4 | 424 | } |
08a9c49f | 425 | end: |
947308c4 | 426 | return 0; |
2f70b271 DG |
427 | |
428 | error: | |
429 | return -1; | |
947308c4 DG |
430 | } |
431 | ||
65beb5ff | 432 | /* |
9ae110e2 | 433 | * Connect to the LTTng session daemon. |
65beb5ff | 434 | * |
3e3665b8 | 435 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 436 | */ |
3e3665b8 | 437 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
438 | { |
439 | int ret; | |
440 | ||
441 | ret = set_session_daemon_path(); | |
442 | if (ret < 0) { | |
2f70b271 | 443 | goto error; |
65beb5ff DG |
444 | } |
445 | ||
9ae110e2 | 446 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
447 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
448 | if (ret < 0) { | |
2f70b271 | 449 | goto error; |
65beb5ff DG |
450 | } |
451 | ||
3e3665b8 | 452 | return ret; |
2f70b271 DG |
453 | |
454 | error: | |
455 | return -1; | |
65beb5ff DG |
456 | } |
457 | ||
3e3665b8 JG |
458 | static void reset_global_sessiond_connection_state(void) |
459 | { | |
460 | sessiond_socket = -1; | |
461 | connected = 0; | |
462 | } | |
463 | ||
65beb5ff | 464 | /* |
1c8d13c8 | 465 | * Clean disconnect from the session daemon. |
9ae110e2 | 466 | * |
1c8d13c8 | 467 | * On success, return 0. On error, return -1. |
65beb5ff DG |
468 | */ |
469 | static int disconnect_sessiond(void) | |
470 | { | |
471 | int ret = 0; | |
472 | ||
473 | if (connected) { | |
474 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 475 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
476 | } |
477 | ||
478 | return ret; | |
479 | } | |
480 | ||
795a978d PP |
481 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
482 | size_t *user_len) | |
483 | { | |
484 | int ret = 0; | |
485 | void *buf = NULL; | |
486 | ||
487 | if (len) { | |
488 | if (!user_len) { | |
489 | ret = -LTTNG_ERR_INVALID; | |
490 | goto end; | |
491 | } | |
492 | ||
493 | buf = zmalloc(len); | |
494 | if (!buf) { | |
495 | ret = -ENOMEM; | |
496 | goto end; | |
497 | } | |
498 | ||
499 | ret = recv_data_sessiond(buf, len); | |
500 | if (ret < 0) { | |
501 | goto end; | |
502 | } | |
503 | ||
504 | if (!user_buf) { | |
505 | ret = -LTTNG_ERR_INVALID; | |
506 | goto end; | |
507 | } | |
508 | ||
509 | /* Move ownership of command header buffer to user. */ | |
510 | *user_buf = buf; | |
511 | buf = NULL; | |
512 | *user_len = len; | |
513 | } else { | |
514 | /* No command header. */ | |
515 | if (user_len) { | |
516 | *user_len = 0; | |
517 | } | |
518 | ||
519 | if (user_buf) { | |
520 | *user_buf = NULL; | |
521 | } | |
522 | } | |
523 | ||
524 | end: | |
525 | free(buf); | |
526 | return ret; | |
527 | } | |
528 | ||
35a6fdb7 | 529 | /* |
cd80958d | 530 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
531 | * Takes extra var. len. data and file descriptors as input to send to the |
532 | * session daemon. | |
65beb5ff | 533 | * |
af87c45a | 534 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 535 | */ |
cac3069d | 536 | LTTNG_HIDDEN |
a04d53fc FD |
537 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
538 | const int *fds, size_t nb_fd, const void *vardata, | |
539 | size_t vardata_len, void **user_payload_buf, | |
540 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
541 | { |
542 | int ret; | |
795a978d | 543 | size_t payload_len; |
cd80958d | 544 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
545 | |
546 | ret = connect_sessiond(); | |
547 | if (ret < 0) { | |
2f70b271 | 548 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 549 | goto end; |
3e3665b8 JG |
550 | } else { |
551 | sessiond_socket = ret; | |
552 | connected = 1; | |
65beb5ff DG |
553 | } |
554 | ||
cd80958d | 555 | ret = send_session_msg(lsm); |
65beb5ff | 556 | if (ret < 0) { |
2f70b271 | 557 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
558 | goto end; |
559 | } | |
53a80697 | 560 | /* Send var len data */ |
795a978d | 561 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 562 | if (ret < 0) { |
2f70b271 | 563 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
564 | goto end; |
565 | } | |
65beb5ff | 566 | |
a04d53fc FD |
567 | /* Send fds */ |
568 | ret = send_session_fds(fds, nb_fd); | |
569 | if (ret < 0) { | |
570 | /* Ret value is a valid lttng error code. */ | |
571 | goto end; | |
572 | } | |
573 | ||
65beb5ff DG |
574 | /* Get header from data transmission */ |
575 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
576 | if (ret < 0) { | |
2f70b271 | 577 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
578 | goto end; |
579 | } | |
580 | ||
581 | /* Check error code if OK */ | |
f73fabfd | 582 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
583 | ret = -llm.ret_code; |
584 | goto end; | |
585 | } | |
586 | ||
795a978d PP |
587 | /* Get command header from data transmission */ |
588 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
589 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 590 | if (ret < 0) { |
65beb5ff DG |
591 | goto end; |
592 | } | |
593 | ||
795a978d PP |
594 | /* Get payload from data transmission */ |
595 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
596 | &payload_len); | |
597 | if (ret < 0) { | |
83009e5e DG |
598 | goto end; |
599 | } | |
600 | ||
795a978d | 601 | ret = llm.data_size; |
65beb5ff DG |
602 | |
603 | end: | |
604 | disconnect_sessiond(); | |
605 | return ret; | |
606 | } | |
607 | ||
e368fb43 JG |
608 | LTTNG_HIDDEN |
609 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, | |
610 | struct lttng_payload *reply) | |
611 | { | |
612 | int ret; | |
613 | struct lttcomm_lttng_msg llm; | |
fe489250 | 614 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 | 615 | |
a0377dfe FD |
616 | LTTNG_ASSERT(reply->buffer.size == 0); |
617 | LTTNG_ASSERT(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); | |
e368fb43 JG |
618 | |
619 | ret = connect_sessiond(); | |
620 | if (ret < 0) { | |
621 | ret = -LTTNG_ERR_NO_SESSIOND; | |
622 | goto end; | |
623 | } else { | |
624 | sessiond_socket = ret; | |
625 | connected = 1; | |
626 | } | |
627 | ||
628 | /* Send command to session daemon */ | |
629 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data, | |
630 | message->buffer.size); | |
631 | if (ret < 0) { | |
632 | ret = -LTTNG_ERR_FATAL; | |
633 | goto end; | |
634 | } | |
635 | ||
fe489250 JG |
636 | if (fd_count > 0) { |
637 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, | |
638 | message); | |
639 | if (ret < 0) { | |
640 | ret = -LTTNG_ERR_FATAL; | |
641 | goto end; | |
642 | } | |
e368fb43 JG |
643 | } |
644 | ||
645 | /* Get header from data transmission */ | |
646 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
647 | if (ret < 0) { | |
648 | /* Ret value is a valid lttng error code. */ | |
649 | goto end; | |
650 | } | |
651 | ||
652 | llm = *((typeof(llm) *) reply->buffer.data); | |
653 | ||
654 | /* Check error code if OK */ | |
655 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
656 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
657 | /* Invalid error code received. */ | |
658 | ret = -LTTNG_ERR_UNK; | |
659 | } else { | |
660 | ret = -llm.ret_code; | |
661 | } | |
e368fb43 JG |
662 | goto end; |
663 | } | |
664 | ||
665 | if (llm.cmd_header_size > 0) { | |
666 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
667 | if (ret < 0) { | |
668 | goto end; | |
669 | } | |
670 | } | |
671 | ||
672 | /* Get command header from data transmission */ | |
673 | if (llm.data_size > 0) { | |
674 | ret = recv_payload_sessiond(reply, llm.data_size); | |
675 | if (ret < 0) { | |
676 | goto end; | |
677 | } | |
678 | } | |
679 | ||
680 | if (llm.fd_count > 0) { | |
fe489250 JG |
681 | ret = lttcomm_recv_payload_fds_unix_sock( |
682 | sessiond_socket, llm.fd_count, reply); | |
683 | if (ret < 0) { | |
e368fb43 JG |
684 | goto end; |
685 | } | |
686 | } | |
687 | ||
688 | /* Don't return the llm header to the caller. */ | |
689 | memmove(reply->buffer.data, reply->buffer.data + sizeof(llm), | |
690 | reply->buffer.size - sizeof(llm)); | |
691 | ret = lttng_dynamic_buffer_set_size( | |
692 | &reply->buffer, reply->buffer.size - sizeof(llm)); | |
693 | if (ret) { | |
694 | /* Can't happen as size is reduced. */ | |
695 | abort(); | |
696 | } | |
697 | ||
698 | ret = reply->buffer.size; | |
699 | ||
700 | end: | |
701 | disconnect_sessiond(); | |
702 | return ret; | |
703 | } | |
704 | ||
9f19cc17 | 705 | /* |
cd80958d | 706 | * Create lttng handle and return pointer. |
9ae110e2 | 707 | * |
1c8d13c8 | 708 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 709 | */ |
cd80958d DG |
710 | struct lttng_handle *lttng_create_handle(const char *session_name, |
711 | struct lttng_domain *domain) | |
9f19cc17 | 712 | { |
e1b624d0 | 713 | int ret; |
2f70b271 DG |
714 | struct lttng_handle *handle = NULL; |
715 | ||
3f451dc0 | 716 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 717 | if (handle == NULL) { |
2f70b271 | 718 | PERROR("malloc handle"); |
cd80958d DG |
719 | goto end; |
720 | } | |
721 | ||
722 | /* Copy session name */ | |
e1b624d0 JG |
723 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
724 | sizeof(handle->session_name)); | |
725 | if (ret) { | |
726 | goto error; | |
727 | } | |
cd80958d | 728 | |
95681498 JG |
729 | /* Copy lttng domain or leave initialized to 0. */ |
730 | if (domain) { | |
731 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
732 | } | |
cd80958d DG |
733 | |
734 | end: | |
735 | return handle; | |
e1b624d0 JG |
736 | error: |
737 | free(handle); | |
738 | return NULL; | |
cd80958d DG |
739 | } |
740 | ||
741 | /* | |
742 | * Destroy handle by free(3) the pointer. | |
743 | */ | |
744 | void lttng_destroy_handle(struct lttng_handle *handle) | |
745 | { | |
0e428499 | 746 | free(handle); |
eb354453 DG |
747 | } |
748 | ||
d9800920 DG |
749 | /* |
750 | * Register an outside consumer. | |
9ae110e2 | 751 | * |
1c8d13c8 | 752 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
753 | */ |
754 | int lttng_register_consumer(struct lttng_handle *handle, | |
755 | const char *socket_path) | |
756 | { | |
e1b624d0 | 757 | int ret; |
d9800920 DG |
758 | struct lttcomm_session_msg lsm; |
759 | ||
2f70b271 | 760 | if (handle == NULL || socket_path == NULL) { |
e1b624d0 JG |
761 | ret = -LTTNG_ERR_INVALID; |
762 | goto end; | |
2f70b271 DG |
763 | } |
764 | ||
53efb85a | 765 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 766 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
e1b624d0 | 767 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 768 | sizeof(lsm.session.name)); |
e1b624d0 JG |
769 | if (ret) { |
770 | ret = -LTTNG_ERR_INVALID; | |
771 | goto end; | |
772 | } | |
773 | ||
60160d2a | 774 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 775 | |
e1b624d0 JG |
776 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
777 | sizeof(lsm.u.reg.path)); | |
778 | if (ret) { | |
779 | ret = -LTTNG_ERR_INVALID; | |
780 | goto end; | |
781 | } | |
d9800920 | 782 | |
e1b624d0 JG |
783 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
784 | end: | |
785 | return ret; | |
d9800920 DG |
786 | } |
787 | ||
1df4dedd | 788 | /* |
9ae110e2 JG |
789 | * Start tracing for all traces of the session. |
790 | * | |
791 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 792 | */ |
6a4f824d | 793 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 794 | { |
e1b624d0 | 795 | int ret; |
cd80958d DG |
796 | struct lttcomm_session_msg lsm; |
797 | ||
6a4f824d | 798 | if (session_name == NULL) { |
e1b624d0 JG |
799 | ret = -LTTNG_ERR_INVALID; |
800 | goto end; | |
cd80958d DG |
801 | } |
802 | ||
53efb85a | 803 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 804 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 805 | |
e1b624d0 JG |
806 | ret = lttng_strncpy(lsm.session.name, session_name, |
807 | sizeof(lsm.session.name)); | |
808 | if (ret) { | |
809 | ret = -LTTNG_ERR_INVALID; | |
810 | goto end; | |
811 | } | |
cd80958d | 812 | |
e1b624d0 JG |
813 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
814 | end: | |
815 | return ret; | |
f3ed775e | 816 | } |
1df4dedd DG |
817 | |
818 | /* | |
38ee087f | 819 | * Stop tracing for all traces of the session. |
f3ed775e | 820 | */ |
38ee087f | 821 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 822 | { |
38ee087f | 823 | int ret, data_ret; |
cd80958d DG |
824 | struct lttcomm_session_msg lsm; |
825 | ||
6a4f824d | 826 | if (session_name == NULL) { |
e1b624d0 JG |
827 | ret = -LTTNG_ERR_INVALID; |
828 | goto error; | |
6a4f824d DG |
829 | } |
830 | ||
53efb85a | 831 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 832 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 833 | |
e1b624d0 JG |
834 | ret = lttng_strncpy(lsm.session.name, session_name, |
835 | sizeof(lsm.session.name)); | |
836 | if (ret) { | |
837 | ret = -LTTNG_ERR_INVALID; | |
838 | goto error; | |
839 | } | |
cd80958d | 840 | |
cac3069d | 841 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
842 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
843 | goto error; | |
844 | } | |
845 | ||
846 | if (!wait) { | |
847 | goto end; | |
848 | } | |
849 | ||
38ee087f DG |
850 | /* Check for data availability */ |
851 | do { | |
6d805429 | 852 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
853 | if (data_ret < 0) { |
854 | /* Return the data available call error. */ | |
855 | ret = data_ret; | |
856 | goto error; | |
857 | } | |
858 | ||
859 | /* | |
9ae110e2 JG |
860 | * Data sleep time before retrying (in usec). Don't sleep if the |
861 | * call returned value indicates availability. | |
38ee087f | 862 | */ |
6d805429 | 863 | if (data_ret) { |
c8f61fd4 | 864 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 865 | } |
6d805429 | 866 | } while (data_ret != 0); |
38ee087f | 867 | |
38ee087f DG |
868 | end: |
869 | error: | |
870 | return ret; | |
871 | } | |
872 | ||
873 | /* | |
874 | * Stop tracing and wait for data availability. | |
875 | */ | |
876 | int lttng_stop_tracing(const char *session_name) | |
877 | { | |
878 | return _lttng_stop_tracing(session_name, 1); | |
879 | } | |
880 | ||
881 | /* | |
882 | * Stop tracing but _don't_ wait for data availability. | |
883 | */ | |
884 | int lttng_stop_tracing_no_wait(const char *session_name) | |
885 | { | |
886 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
887 | } |
888 | ||
889 | /* | |
601d5acf DG |
890 | * Add context to a channel. |
891 | * | |
892 | * If the given channel is NULL, add the contexts to all channels. | |
893 | * The event_name param is ignored. | |
af87c45a DG |
894 | * |
895 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 896 | */ |
cd80958d | 897 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
898 | struct lttng_event_context *ctx, const char *event_name, |
899 | const char *channel_name) | |
d65106b1 | 900 | { |
2001793c JG |
901 | int ret; |
902 | size_t len = 0; | |
903 | char *buf = NULL; | |
cd80958d DG |
904 | struct lttcomm_session_msg lsm; |
905 | ||
9ae110e2 | 906 | /* Safety check. Both are mandatory. */ |
9d697d3d | 907 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
908 | ret = -LTTNG_ERR_INVALID; |
909 | goto end; | |
cd80958d DG |
910 | } |
911 | ||
441c16a7 | 912 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
913 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
914 | ||
85076754 | 915 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
916 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
917 | sizeof(lsm.u.context.channel_name)); | |
918 | if (ret) { | |
919 | ret = -LTTNG_ERR_INVALID; | |
920 | goto end; | |
85076754 | 921 | } |
cd80958d | 922 | |
60160d2a | 923 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
e1b624d0 | 924 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 925 | sizeof(lsm.session.name)); |
e1b624d0 JG |
926 | if (ret) { |
927 | ret = -LTTNG_ERR_INVALID; | |
928 | goto end; | |
929 | } | |
cd80958d | 930 | |
2001793c JG |
931 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
932 | size_t provider_len, ctx_len; | |
933 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
934 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
935 | ||
936 | if (!provider_name || !ctx_name) { | |
937 | ret = -LTTNG_ERR_INVALID; | |
938 | goto end; | |
939 | } | |
940 | ||
941 | provider_len = strlen(provider_name); | |
942 | if (provider_len == 0) { | |
943 | ret = -LTTNG_ERR_INVALID; | |
944 | goto end; | |
945 | } | |
946 | lsm.u.context.provider_name_len = provider_len; | |
947 | ||
948 | ctx_len = strlen(ctx_name); | |
949 | if (ctx_len == 0) { | |
950 | ret = -LTTNG_ERR_INVALID; | |
951 | goto end; | |
952 | } | |
953 | lsm.u.context.context_name_len = ctx_len; | |
954 | ||
955 | len = provider_len + ctx_len; | |
956 | buf = zmalloc(len); | |
957 | if (!buf) { | |
958 | ret = -LTTNG_ERR_NOMEM; | |
959 | goto end; | |
960 | } | |
961 | ||
962 | memcpy(buf, provider_name, provider_len); | |
963 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
964 | } | |
965 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
966 | |
967 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
968 | /* | |
969 | * Don't leak application addresses to the sessiond. | |
970 | * This is only necessary when ctx is for an app ctx otherwise | |
971 | * the values inside the union (type & config) are overwritten. | |
972 | */ | |
973 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
974 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
975 | } | |
2001793c | 976 | |
795a978d | 977 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
978 | end: |
979 | free(buf); | |
980 | return ret; | |
d65106b1 DG |
981 | } |
982 | ||
f3ed775e | 983 | /* |
9ae110e2 JG |
984 | * Enable event(s) for a channel. |
985 | * | |
986 | * If no event name is specified, all events are enabled. | |
987 | * If no channel name is specified, the default 'channel0' is used. | |
988 | * | |
989 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 990 | */ |
cd80958d | 991 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 992 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 993 | { |
f8a96544 JI |
994 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
995 | NULL, 0, NULL); | |
1df4dedd DG |
996 | } |
997 | ||
53a80697 | 998 | /* |
025faf73 | 999 | * Create or enable an event with a filter expression. |
178191b3 | 1000 | * |
53a80697 MD |
1001 | * Return negative error value on error. |
1002 | * Return size of returned session payload data if OK. | |
1003 | */ | |
025faf73 | 1004 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 1005 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
1006 | const char *filter_expression) |
1007 | { | |
f8a96544 JI |
1008 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
1009 | filter_expression, 0, NULL); | |
53a80697 MD |
1010 | } |
1011 | ||
347c5ab5 | 1012 | /* |
0e115563 | 1013 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1014 | * NULL if not applicable. |
1015 | * | |
1016 | * An event with NO loglevel and the name is * will return NULL. | |
1017 | */ | |
0e115563 | 1018 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1019 | { |
1020 | int err; | |
0e115563 | 1021 | char *agent_filter = NULL; |
347c5ab5 | 1022 | |
a0377dfe | 1023 | LTTNG_ASSERT(ev); |
347c5ab5 DG |
1024 | |
1025 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1026 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1027 | if (filter) { |
0e115563 | 1028 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
1029 | ev->name); |
1030 | } else { | |
0e115563 | 1031 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1032 | } |
1033 | if (err < 0) { | |
1034 | PERROR("asprintf"); | |
6a556f7b | 1035 | goto error; |
347c5ab5 DG |
1036 | } |
1037 | } | |
1038 | ||
1039 | /* Add loglevel filtering if any for the JUL domain. */ | |
1040 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1041 | const char *op; |
347c5ab5 DG |
1042 | |
1043 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1044 | op = ">="; | |
1045 | } else { | |
1046 | op = "=="; | |
1047 | } | |
1048 | ||
0e115563 | 1049 | if (filter || agent_filter) { |
6a556f7b JG |
1050 | char *new_filter; |
1051 | ||
fb0edb23 | 1052 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 1053 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 1054 | ev->loglevel); |
0e115563 DG |
1055 | if (agent_filter) { |
1056 | free(agent_filter); | |
6a556f7b | 1057 | } |
0e115563 | 1058 | agent_filter = new_filter; |
347c5ab5 | 1059 | } else { |
0e115563 | 1060 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
1061 | ev->loglevel); |
1062 | } | |
1063 | if (err < 0) { | |
1064 | PERROR("asprintf"); | |
6a556f7b | 1065 | goto error; |
347c5ab5 DG |
1066 | } |
1067 | } | |
1068 | ||
0e115563 | 1069 | return agent_filter; |
6a556f7b | 1070 | error: |
0e115563 | 1071 | free(agent_filter); |
6a556f7b | 1072 | return NULL; |
347c5ab5 DG |
1073 | } |
1074 | ||
93deb080 JI |
1075 | /* |
1076 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1077 | * If no event name is specified, all events are enabled. | |
1078 | * If no channel name is specified, the default name is used. | |
1079 | * If filter expression is not NULL, the filter is set for the event. | |
1080 | * If exclusion count is not zero, the exclusions are set for the event. | |
1081 | * Returns size of returned session payload data or a negative error code. | |
1082 | */ | |
1083 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1084 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1085 | const char *original_filter_expression, |
93deb080 JI |
1086 | int exclusion_count, char **exclusion_list) |
1087 | { | |
1088 | struct lttcomm_session_msg lsm; | |
e368fb43 JG |
1089 | struct lttng_payload payload; |
1090 | int ret = 0, i; | |
137b9942 | 1091 | unsigned int free_filter_expression = 0; |
93deb080 | 1092 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1093 | |
6a0838b7 YL |
1094 | /* |
1095 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1096 | * a variable-length payload from where to send the data. |
6a0838b7 | 1097 | */ |
e368fb43 | 1098 | lttng_payload_init(&payload); |
ec005ec6 | 1099 | |
e9efbcd3 JG |
1100 | /* |
1101 | * Cast as non-const since we may replace the filter expression | |
1102 | * by a dynamically allocated string. Otherwise, the original | |
1103 | * string is not modified. | |
1104 | */ | |
1105 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1106 | |
1107 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1108 | ret = -LTTNG_ERR_INVALID; |
1109 | goto error; | |
93deb080 JI |
1110 | } |
1111 | ||
9ae110e2 JG |
1112 | /* |
1113 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1114 | * anyway, so treat this corner-case early to eliminate |
1115 | * lttng_fmemopen error for 0-byte allocation. | |
1116 | */ | |
1117 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1118 | ret = -LTTNG_ERR_INVALID; |
1119 | goto error; | |
93deb080 JI |
1120 | } |
1121 | ||
1122 | memset(&lsm, 0, sizeof(lsm)); | |
1123 | ||
1124 | /* If no channel name, send empty string. */ | |
e1b624d0 JG |
1125 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", |
1126 | sizeof(lsm.u.enable.channel_name)); | |
1127 | if (ret) { | |
1128 | ret = -LTTNG_ERR_INVALID; | |
1129 | goto error; | |
93deb080 JI |
1130 | } |
1131 | ||
18a720cd MD |
1132 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1133 | if (ev->name[0] == '\0') { | |
e1b624d0 JG |
1134 | /* Enable all events. */ |
1135 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
a0377dfe | 1136 | LTTNG_ASSERT(ret == 0); |
6565421f | 1137 | } |
93deb080 | 1138 | |
60160d2a | 1139 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1140 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1141 | ||
e1b624d0 | 1142 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
93deb080 | 1143 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1144 | if (ret) { |
1145 | ret = -LTTNG_ERR_INVALID; | |
1146 | goto error; | |
1147 | } | |
1148 | ||
93deb080 JI |
1149 | lsm.u.enable.exclusion_count = exclusion_count; |
1150 | lsm.u.enable.bytecode_len = 0; | |
1151 | ||
9ae110e2 | 1152 | /* Parse filter expression. */ |
5cdb6027 | 1153 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1154 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1155 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1156 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1157 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1158 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1159 | char *agent_filter; | |
64226865 | 1160 | |
347c5ab5 | 1161 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1162 | agent_filter = set_agent_filter(filter_expression, ev); |
1163 | if (!agent_filter) { | |
137b9942 | 1164 | if (!filter_expression) { |
9ae110e2 JG |
1165 | /* |
1166 | * No JUL and no filter, just skip | |
1167 | * everything below. | |
1168 | */ | |
137b9942 DG |
1169 | goto ask_sessiond; |
1170 | } | |
64226865 DG |
1171 | } else { |
1172 | /* | |
9ae110e2 JG |
1173 | * With an agent filter, the original filter has |
1174 | * been added to it thus replace the filter | |
1175 | * expression. | |
64226865 | 1176 | */ |
0e115563 | 1177 | filter_expression = agent_filter; |
e9efbcd3 | 1178 | free_filter_expression = 1; |
9b21e6d5 | 1179 | } |
9b21e6d5 | 1180 | } |
93deb080 | 1181 | |
e4d2f27a | 1182 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1183 | if (ret) { |
137b9942 | 1184 | goto filter_error; |
93deb080 | 1185 | } |
e4d2f27a JR |
1186 | |
1187 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1188 | + bytecode_get_len(&ctx->bytecode->b); | |
1189 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6b453b5e JG |
1190 | } |
1191 | ||
e368fb43 JG |
1192 | ret = lttng_dynamic_buffer_set_capacity(&payload.buffer, |
1193 | lsm.u.enable.bytecode_len + | |
1194 | lsm.u.enable.expression_len + | |
1195 | LTTNG_SYMBOL_NAME_LEN * | |
1196 | exclusion_count); | |
15e37663 | 1197 | if (ret) { |
6b453b5e | 1198 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1199 | goto mem_error; |
6b453b5e | 1200 | } |
137b9942 | 1201 | |
9ae110e2 | 1202 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1203 | for (i = 0; i < exclusion_count; i++) { |
1204 | size_t exclusion_len; | |
1205 | ||
53a5c209 | 1206 | exclusion_len = lttng_strnlen(exclusion_list[i], |
15e37663 JG |
1207 | LTTNG_SYMBOL_NAME_LEN); |
1208 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1209 | /* Exclusion is not NULL-terminated. */ | |
1210 | ret = -LTTNG_ERR_INVALID; | |
1211 | goto mem_error; | |
1212 | } | |
1213 | ||
e368fb43 | 1214 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
53a5c209 FD |
1215 | exclusion_list[i], exclusion_len); |
1216 | if (ret) { | |
1217 | goto mem_error; | |
1218 | } | |
1219 | ||
1220 | /* | |
1221 | * Padding the rest of the entry with zeros. Every exclusion | |
1222 | * entries take LTTNG_SYMBOL_NAME_LEN bytes in the buffer. | |
1223 | */ | |
1224 | ret = lttng_dynamic_buffer_set_size(&payload.buffer, | |
1225 | LTTNG_SYMBOL_NAME_LEN * (i + 1)); | |
15e37663 JG |
1226 | if (ret) { |
1227 | goto mem_error; | |
1228 | } | |
6b453b5e | 1229 | } |
15e37663 | 1230 | |
9ae110e2 | 1231 | /* Add filter expression next. */ |
15e37663 | 1232 | if (filter_expression) { |
e368fb43 | 1233 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1234 | filter_expression, lsm.u.enable.expression_len); |
1235 | if (ret) { | |
1236 | goto mem_error; | |
1237 | } | |
6b453b5e | 1238 | } |
9ae110e2 | 1239 | /* Add filter bytecode next. */ |
137b9942 | 1240 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
e368fb43 | 1241 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1242 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); |
1243 | if (ret) { | |
1244 | goto mem_error; | |
1245 | } | |
1246 | } | |
1247 | if (ev->extended.ptr) { | |
1248 | struct lttng_event_extended *ev_ext = | |
1249 | (struct lttng_event_extended *) ev->extended.ptr; | |
1250 | ||
1251 | if (ev_ext->probe_location) { | |
1252 | /* | |
1253 | * lttng_userspace_probe_location_serialize returns the | |
1254 | * number of bytes that was appended to the buffer. | |
1255 | */ | |
1256 | ret = lttng_userspace_probe_location_serialize( | |
e368fb43 | 1257 | ev_ext->probe_location, &payload); |
56f0bc67 | 1258 | if (ret < 0) { |
15e37663 JG |
1259 | goto mem_error; |
1260 | } | |
1261 | ||
15e37663 JG |
1262 | /* |
1263 | * Set the size of the userspace probe location element | |
1264 | * of the buffer so that the receiving side knows where | |
1265 | * to split it. | |
1266 | */ | |
1267 | lsm.u.enable.userspace_probe_location_len = ret; | |
1268 | } | |
93deb080 JI |
1269 | } |
1270 | ||
e368fb43 JG |
1271 | { |
1272 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1273 | &payload, 0, -1); | |
fe489250 | 1274 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1275 | int fd_to_send; |
1276 | ||
1277 | if (fd_count < 0) { | |
1278 | goto mem_error; | |
1279 | } | |
1280 | ||
a0377dfe | 1281 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); |
e368fb43 | 1282 | if (fd_count == 1) { |
e2fc8e9d | 1283 | struct fd_handle *h = |
fe489250 JG |
1284 | lttng_payload_view_pop_fd_handle(&view); |
1285 | ||
e2fc8e9d | 1286 | if (!h) { |
e368fb43 JG |
1287 | goto mem_error; |
1288 | } | |
1289 | ||
e2fc8e9d SM |
1290 | fd_to_send = fd_handle_get_fd(h); |
1291 | fd_handle_put(h); | |
e368fb43 JG |
1292 | } |
1293 | ||
1294 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1295 | fd_count ? &fd_to_send : NULL, fd_count, | |
1296 | view.buffer.size ? view.buffer.data : NULL, | |
1297 | view.buffer.size, NULL, NULL, 0); | |
1298 | } | |
93deb080 | 1299 | |
7ca1dc6f DG |
1300 | mem_error: |
1301 | if (filter_expression && ctx) { | |
93deb080 JI |
1302 | filter_bytecode_free(ctx); |
1303 | filter_ir_free(ctx); | |
1304 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1305 | } |
1306 | filter_error: | |
1307 | if (free_filter_expression) { | |
1308 | /* | |
9ae110e2 JG |
1309 | * The filter expression has been replaced and must be freed as |
1310 | * it is not the original filter expression received as a | |
1311 | * parameter. | |
7ca1dc6f DG |
1312 | */ |
1313 | free(filter_expression); | |
93deb080 | 1314 | } |
137b9942 DG |
1315 | error: |
1316 | /* | |
9ae110e2 JG |
1317 | * Return directly to the caller and don't ask the sessiond since |
1318 | * something went wrong in the parsing of data above. | |
137b9942 | 1319 | */ |
e368fb43 | 1320 | lttng_payload_reset(&payload); |
93deb080 | 1321 | return ret; |
3e1c9ff7 DG |
1322 | |
1323 | ask_sessiond: | |
1324 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1325 | return ret; | |
93deb080 JI |
1326 | } |
1327 | ||
6e911cad MD |
1328 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1329 | struct lttng_event *ev, const char *channel_name, | |
1330 | const char *original_filter_expression) | |
1df4dedd | 1331 | { |
cd80958d | 1332 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1333 | char *varlen_data; |
1334 | int ret = 0; | |
1335 | unsigned int free_filter_expression = 0; | |
1336 | struct filter_parser_ctx *ctx = NULL; | |
1337 | /* | |
1338 | * Cast as non-const since we may replace the filter expression | |
1339 | * by a dynamically allocated string. Otherwise, the original | |
1340 | * string is not modified. | |
1341 | */ | |
1342 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1343 | |
6e911cad MD |
1344 | if (handle == NULL || ev == NULL) { |
1345 | ret = -LTTNG_ERR_INVALID; | |
1346 | goto error; | |
1347 | } | |
1348 | ||
9ae110e2 JG |
1349 | /* |
1350 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1351 | * anyway, so treat this corner-case early to eliminate |
1352 | * lttng_fmemopen error for 0-byte allocation. | |
1353 | */ | |
1354 | if (filter_expression && filter_expression[0] == '\0') { | |
1355 | ret = -LTTNG_ERR_INVALID; | |
1356 | goto error; | |
cd80958d DG |
1357 | } |
1358 | ||
441c16a7 MD |
1359 | memset(&lsm, 0, sizeof(lsm)); |
1360 | ||
85076754 | 1361 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
1362 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", |
1363 | sizeof(lsm.u.disable.channel_name)); | |
1364 | if (ret) { | |
1365 | ret = -LTTNG_ERR_INVALID; | |
1366 | goto error; | |
eb354453 DG |
1367 | } |
1368 | ||
18a720cd | 1369 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1370 | |
60160d2a | 1371 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1372 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1373 | ||
e1b624d0 | 1374 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 1375 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1376 | if (ret) { |
1377 | ret = -LTTNG_ERR_INVALID; | |
1378 | goto error; | |
1379 | } | |
1380 | ||
6e911cad | 1381 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1382 | |
6e911cad MD |
1383 | /* |
1384 | * For the JUL domain, a filter is enforced except for the | |
1385 | * disable all event. This is done to avoid having the event in | |
1386 | * all sessions thus filtering by logger name. | |
1387 | */ | |
1388 | if (filter_expression == NULL && | |
1389 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1390 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1391 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1392 | goto ask_sessiond; |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * We have a filter, so we need to set up a variable-length | |
1397 | * memory block from where to send the data. | |
1398 | */ | |
1399 | ||
1400 | /* Parse filter expression */ | |
1401 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1402 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1403 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1404 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1405 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1406 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1407 | char *agent_filter; | |
6e911cad MD |
1408 | |
1409 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1410 | agent_filter = set_agent_filter(filter_expression, ev); |
1411 | if (!agent_filter) { | |
6e911cad | 1412 | if (!filter_expression) { |
9ae110e2 JG |
1413 | /* |
1414 | * No JUL and no filter, just skip | |
1415 | * everything below. | |
1416 | */ | |
6e911cad MD |
1417 | goto ask_sessiond; |
1418 | } | |
1419 | } else { | |
1420 | /* | |
9ae110e2 JG |
1421 | * With a JUL filter, the original filter has |
1422 | * been added to it thus replace the filter | |
1423 | * expression. | |
6e911cad | 1424 | */ |
0e115563 | 1425 | filter_expression = agent_filter; |
6e911cad MD |
1426 | free_filter_expression = 1; |
1427 | } | |
1428 | } | |
1429 | ||
e4d2f27a | 1430 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad MD |
1431 | if (ret) { |
1432 | goto filter_error; | |
1433 | } | |
e4d2f27a JR |
1434 | |
1435 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1436 | + bytecode_get_len(&ctx->bytecode->b); | |
1437 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6e911cad MD |
1438 | } |
1439 | ||
1440 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1441 | + lsm.u.disable.expression_len); | |
1442 | if (!varlen_data) { | |
1443 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1444 | goto mem_error; | |
1445 | } | |
1446 | ||
9ae110e2 | 1447 | /* Add filter expression. */ |
6e911cad MD |
1448 | if (lsm.u.disable.expression_len != 0) { |
1449 | memcpy(varlen_data, | |
1450 | filter_expression, | |
1451 | lsm.u.disable.expression_len); | |
1452 | } | |
9ae110e2 | 1453 | /* Add filter bytecode next. */ |
6e911cad MD |
1454 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1455 | memcpy(varlen_data | |
1456 | + lsm.u.disable.expression_len, | |
1457 | &ctx->bytecode->b, | |
1458 | lsm.u.disable.bytecode_len); | |
1459 | } | |
1460 | ||
795a978d | 1461 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1462 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1463 | free(varlen_data); | |
1464 | ||
1465 | mem_error: | |
1466 | if (filter_expression && ctx) { | |
1467 | filter_bytecode_free(ctx); | |
1468 | filter_ir_free(ctx); | |
1469 | filter_parser_ctx_free(ctx); | |
1470 | } | |
1471 | filter_error: | |
1472 | if (free_filter_expression) { | |
1473 | /* | |
9ae110e2 JG |
1474 | * The filter expression has been replaced and must be freed as |
1475 | * it is not the original filter expression received as a | |
1476 | * parameter. | |
6e911cad MD |
1477 | */ |
1478 | free(filter_expression); | |
1479 | } | |
1480 | error: | |
1481 | /* | |
9ae110e2 JG |
1482 | * Return directly to the caller and don't ask the sessiond since |
1483 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1484 | */ |
1485 | return ret; | |
1486 | ||
1487 | ask_sessiond: | |
1488 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1489 | return ret; | |
1490 | } | |
1491 | ||
1492 | /* | |
9ae110e2 JG |
1493 | * Disable event(s) of a channel and domain. |
1494 | * If no event name is specified, all events are disabled. | |
1495 | * If no channel name is specified, the default 'channel0' is used. | |
1496 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1497 | */ |
1498 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1499 | const char *channel_name) | |
1500 | { | |
e1b624d0 | 1501 | int ret; |
6e911cad MD |
1502 | struct lttng_event ev; |
1503 | ||
1504 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1505 | ev.loglevel = -1; |
6e911cad | 1506 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1507 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1508 | if (ret) { | |
1509 | ret = -LTTNG_ERR_INVALID; | |
1510 | goto end; | |
1511 | } | |
1512 | ||
1513 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1514 | end: | |
1515 | return ret; | |
1df4dedd DG |
1516 | } |
1517 | ||
cf0bcb51 JG |
1518 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1519 | { | |
1520 | struct lttng_channel *channel = NULL; | |
1521 | struct lttng_channel_extended *extended = NULL; | |
1522 | ||
1523 | if (!domain) { | |
1524 | goto error; | |
1525 | } | |
1526 | ||
1527 | /* Validate domain. */ | |
1528 | switch (domain->type) { | |
1529 | case LTTNG_DOMAIN_UST: | |
1530 | switch (domain->buf_type) { | |
1531 | case LTTNG_BUFFER_PER_UID: | |
1532 | case LTTNG_BUFFER_PER_PID: | |
1533 | break; | |
1534 | default: | |
1535 | goto error; | |
1536 | } | |
1537 | break; | |
1538 | case LTTNG_DOMAIN_KERNEL: | |
1539 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1540 | goto error; | |
1541 | } | |
1542 | break; | |
1543 | default: | |
1544 | goto error; | |
1545 | } | |
1546 | ||
1547 | channel = zmalloc(sizeof(*channel)); | |
1548 | if (!channel) { | |
1549 | goto error; | |
1550 | } | |
1551 | ||
1552 | extended = zmalloc(sizeof(*extended)); | |
1553 | if (!extended) { | |
1554 | goto error; | |
1555 | } | |
1556 | ||
1557 | channel->attr.extended.ptr = extended; | |
1558 | ||
1559 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1560 | return channel; | |
1561 | error: | |
1562 | free(channel); | |
1563 | free(extended); | |
1564 | return NULL; | |
1565 | } | |
1566 | ||
1567 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1568 | { | |
1569 | if (!channel) { | |
1570 | return; | |
1571 | } | |
1572 | ||
1573 | if (channel->attr.extended.ptr) { | |
1574 | free(channel->attr.extended.ptr); | |
1575 | } | |
1576 | free(channel); | |
1577 | } | |
1578 | ||
1df4dedd | 1579 | /* |
9ae110e2 JG |
1580 | * Enable channel per domain |
1581 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1582 | */ |
cd80958d | 1583 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1584 | struct lttng_channel *in_chan) |
a5c5a2bd | 1585 | { |
e1b624d0 | 1586 | int ret; |
cd80958d | 1587 | struct lttcomm_session_msg lsm; |
09b72f7a | 1588 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1589 | |
9ae110e2 | 1590 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1591 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1592 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1593 | } |
1594 | ||
441c16a7 | 1595 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1596 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1597 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1598 | |
cf0bcb51 JG |
1599 | if (!in_chan->attr.extended.ptr) { |
1600 | struct lttng_channel *channel; | |
1601 | struct lttng_channel_extended *extended; | |
7d29a247 | 1602 | |
cf0bcb51 JG |
1603 | channel = lttng_channel_create(&handle->domain); |
1604 | if (!channel) { | |
1605 | return -LTTNG_ERR_NOMEM; | |
1606 | } | |
1607 | ||
1608 | /* | |
1609 | * Create a new channel in order to use default extended | |
1610 | * attribute values. | |
1611 | */ | |
1612 | extended = (struct lttng_channel_extended *) | |
1613 | channel->attr.extended.ptr; | |
1614 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1615 | lttng_channel_destroy(channel); | |
1616 | } else { | |
1617 | struct lttng_channel_extended *extended; | |
1618 | ||
1619 | extended = (struct lttng_channel_extended *) | |
1620 | in_chan->attr.extended.ptr; | |
1621 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1622 | } | |
cd80958d | 1623 | |
09b72f7a FD |
1624 | /* |
1625 | * Verify that the amount of memory required to create the requested | |
1626 | * buffer is available on the system at the moment. | |
1627 | */ | |
1628 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1629 | lsm.u.channel.chan.attr.subbuf_size; | |
1630 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1631 | return -LTTNG_ERR_NOMEM; | |
1632 | } | |
1633 | ||
cf0bcb51 | 1634 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1635 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1636 | |
e1b624d0 JG |
1637 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1638 | sizeof(lsm.session.name)); | |
1639 | if (ret) { | |
1640 | ret = -LTTNG_ERR_INVALID; | |
1641 | goto end; | |
1642 | } | |
cd80958d | 1643 | |
e1b624d0 JG |
1644 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1645 | end: | |
1646 | return ret; | |
8c0faa1d | 1647 | } |
1df4dedd | 1648 | |
2ef84c95 | 1649 | /* |
9ae110e2 JG |
1650 | * All tracing will be stopped for registered events of the channel. |
1651 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1652 | */ |
cd80958d | 1653 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1654 | { |
e1b624d0 | 1655 | int ret; |
cd80958d DG |
1656 | struct lttcomm_session_msg lsm; |
1657 | ||
9ae110e2 | 1658 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1659 | if (handle == NULL || name == NULL) { |
2f70b271 | 1660 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1661 | } |
1662 | ||
441c16a7 MD |
1663 | memset(&lsm, 0, sizeof(lsm)); |
1664 | ||
cd80958d | 1665 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1666 | |
e1b624d0 | 1667 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1668 | sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1669 | if (ret) { |
1670 | ret = -LTTNG_ERR_INVALID; | |
1671 | goto end; | |
1672 | } | |
9d697d3d | 1673 | |
60160d2a | 1674 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1675 | |
e1b624d0 JG |
1676 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1677 | sizeof(lsm.session.name)); | |
1678 | if (ret) { | |
1679 | ret = -LTTNG_ERR_INVALID; | |
1680 | goto end; | |
1681 | } | |
cd80958d | 1682 | |
e1b624d0 JG |
1683 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1684 | end: | |
1685 | return ret; | |
ca95a216 DG |
1686 | } |
1687 | ||
fac6795d | 1688 | /* |
9ae110e2 JG |
1689 | * Lists all available tracepoints of domain. |
1690 | * Sets the contents of the events array. | |
1691 | * Returns the number of lttng_event entries in events; | |
1692 | * on error, returns a negative value. | |
fac6795d | 1693 | */ |
cd80958d | 1694 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1695 | struct lttng_event **events) |
fac6795d | 1696 | { |
052da939 | 1697 | int ret; |
cd80958d DG |
1698 | struct lttcomm_session_msg lsm; |
1699 | ||
9d697d3d | 1700 | if (handle == NULL) { |
2f70b271 | 1701 | return -LTTNG_ERR_INVALID; |
cd80958d | 1702 | } |
fac6795d | 1703 | |
53efb85a | 1704 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1705 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1706 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1707 | |
cac3069d | 1708 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1709 | if (ret < 0) { |
1710 | return ret; | |
eb354453 | 1711 | } |
fac6795d | 1712 | |
9f19cc17 | 1713 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1714 | } |
1715 | ||
f37d259d | 1716 | /* |
9ae110e2 JG |
1717 | * Lists all available tracepoint fields of domain. |
1718 | * Sets the contents of the event field array. | |
1719 | * Returns the number of lttng_event_field entries in events; | |
1720 | * on error, returns a negative value. | |
f37d259d MD |
1721 | */ |
1722 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1723 | struct lttng_event_field **fields) | |
1724 | { | |
1725 | int ret; | |
1726 | struct lttcomm_session_msg lsm; | |
1727 | ||
1728 | if (handle == NULL) { | |
2f70b271 | 1729 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1730 | } |
1731 | ||
53efb85a | 1732 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1733 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1734 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1735 | |
cac3069d | 1736 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1737 | if (ret < 0) { |
1738 | return ret; | |
1739 | } | |
1740 | ||
1741 | return ret / sizeof(struct lttng_event_field); | |
1742 | } | |
1743 | ||
834978fd | 1744 | /* |
9ae110e2 JG |
1745 | * Lists all available kernel system calls. Allocates and sets the contents of |
1746 | * the events array. | |
834978fd | 1747 | * |
9ae110e2 JG |
1748 | * Returns the number of lttng_event entries in events; on error, returns a |
1749 | * negative value. | |
834978fd DG |
1750 | */ |
1751 | int lttng_list_syscalls(struct lttng_event **events) | |
1752 | { | |
1753 | int ret; | |
1754 | struct lttcomm_session_msg lsm; | |
1755 | ||
1756 | if (!events) { | |
1757 | return -LTTNG_ERR_INVALID; | |
1758 | } | |
1759 | ||
1760 | memset(&lsm, 0, sizeof(lsm)); | |
1761 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1762 | /* Force kernel domain for system calls. */ | |
1763 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1764 | ||
1765 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1766 | if (ret < 0) { | |
1767 | return ret; | |
1768 | } | |
1769 | ||
1770 | return ret / sizeof(struct lttng_event); | |
1771 | } | |
1772 | ||
1657e9bb | 1773 | /* |
9ae110e2 JG |
1774 | * Returns a human readable string describing |
1775 | * the error code (a negative value). | |
1657e9bb | 1776 | */ |
9a745bc7 | 1777 | const char *lttng_strerror(int code) |
1657e9bb | 1778 | { |
f73fabfd | 1779 | return error_get_str(code); |
1657e9bb DG |
1780 | } |
1781 | ||
b178f53e JG |
1782 | enum lttng_error_code lttng_create_session_ext( |
1783 | struct lttng_session_descriptor *session_descriptor) | |
1784 | { | |
1785 | enum lttng_error_code ret_code; | |
1786 | struct lttcomm_session_msg lsm = { | |
1787 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1788 | }; | |
1789 | void *reply = NULL; | |
1790 | struct lttng_buffer_view reply_view; | |
1791 | int reply_ret; | |
1792 | bool sessiond_must_generate_ouput; | |
1793 | struct lttng_dynamic_buffer payload; | |
1794 | int ret; | |
1795 | size_t descriptor_size; | |
1796 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1797 | ||
1798 | lttng_dynamic_buffer_init(&payload); | |
1799 | if (!session_descriptor) { | |
1800 | ret_code = LTTNG_ERR_INVALID; | |
1801 | goto end; | |
1802 | } | |
1803 | ||
1804 | sessiond_must_generate_ouput = | |
1805 | !lttng_session_descriptor_is_output_destination_initialized( | |
1806 | session_descriptor); | |
1807 | if (sessiond_must_generate_ouput) { | |
1808 | const char *home_dir = utils_get_home_dir(); | |
1809 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1810 | ||
1811 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1812 | ret_code = LTTNG_ERR_FATAL; | |
1813 | goto end; | |
1814 | } | |
1815 | ||
1816 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1817 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1818 | home_dir_len); | |
1819 | if (ret) { | |
1820 | ret_code = LTTNG_ERR_NOMEM; | |
1821 | goto end; | |
1822 | } | |
1823 | } | |
1824 | ||
1825 | descriptor_size = payload.size; | |
1826 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1827 | &payload); | |
1828 | if (ret) { | |
1829 | ret_code = LTTNG_ERR_INVALID; | |
1830 | goto end; | |
1831 | } | |
1832 | descriptor_size = payload.size - descriptor_size; | |
1833 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1834 | ||
1835 | /* Command returns a session descriptor on success. */ | |
1836 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1837 | payload.size, &reply); | |
1838 | if (reply_ret < 0) { | |
1839 | ret_code = -reply_ret; | |
1840 | goto end; | |
1841 | } else if (reply_ret == 0) { | |
1842 | /* Socket unexpectedly closed by the session daemon. */ | |
1843 | ret_code = LTTNG_ERR_FATAL; | |
1844 | goto end; | |
1845 | } | |
1846 | ||
1847 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1848 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1849 | &descriptor_reply); | |
1850 | if (ret < 0) { | |
1851 | ret_code = LTTNG_ERR_FATAL; | |
1852 | goto end; | |
1853 | } | |
1854 | ret_code = LTTNG_OK; | |
1855 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1856 | end: | |
1857 | free(reply); | |
1858 | lttng_dynamic_buffer_reset(&payload); | |
1859 | lttng_session_descriptor_destroy(descriptor_reply); | |
1860 | return ret_code; | |
1861 | } | |
1862 | ||
aaf97519 | 1863 | /* |
b178f53e | 1864 | * Create a new session using name and url for destination. |
a4b92340 | 1865 | * |
780d4bb8 | 1866 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1867 | */ |
a4b92340 | 1868 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1869 | { |
3dd05a85 | 1870 | int ret; |
a4b92340 | 1871 | ssize_t size; |
a4b92340 | 1872 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1873 | struct lttng_session_descriptor *descriptor = NULL; |
1874 | enum lttng_error_code ret_code; | |
00e2e675 | 1875 | |
b178f53e JG |
1876 | if (!name) { |
1877 | ret = -LTTNG_ERR_INVALID; | |
1878 | goto end; | |
00e2e675 DG |
1879 | } |
1880 | ||
bc894455 | 1881 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1882 | if (size < 0) { |
b178f53e JG |
1883 | ret = -LTTNG_ERR_INVALID; |
1884 | goto end; | |
1885 | } | |
1886 | switch (size) { | |
1887 | case 0: | |
1888 | descriptor = lttng_session_descriptor_create(name); | |
1889 | break; | |
1890 | case 1: | |
1891 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1892 | ret = -LTTNG_ERR_INVALID; | |
1893 | goto end; | |
1894 | } | |
1895 | descriptor = lttng_session_descriptor_local_create(name, | |
1896 | uris[0].dst.path); | |
1897 | break; | |
1898 | case 2: | |
1899 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1900 | NULL); | |
1901 | break; | |
1902 | default: | |
1903 | ret = -LTTNG_ERR_INVALID; | |
1904 | goto end; | |
1905 | } | |
1906 | if (!descriptor) { | |
1907 | ret = -LTTNG_ERR_INVALID; | |
1908 | goto end; | |
00e2e675 | 1909 | } |
b178f53e JG |
1910 | ret_code = lttng_create_session_ext(descriptor); |
1911 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1912 | end: | |
1913 | lttng_session_descriptor_destroy(descriptor); | |
1914 | free(uris); | |
1915 | return ret; | |
1916 | } | |
00e2e675 | 1917 | |
b178f53e JG |
1918 | /* |
1919 | * Create a session exclusively used for snapshot. | |
1920 | * | |
780d4bb8 | 1921 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1922 | */ |
1923 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1924 | { | |
1925 | int ret; | |
1926 | enum lttng_error_code ret_code; | |
1927 | ssize_t size; | |
1928 | struct lttng_uri *uris = NULL; | |
1929 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1930 | |
b178f53e JG |
1931 | if (!name) { |
1932 | ret = -LTTNG_ERR_INVALID; | |
1933 | goto end; | |
1934 | } | |
1935 | ||
1936 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1937 | if (size < 0) { | |
1938 | ret = -LTTNG_ERR_INVALID; | |
1939 | goto end; | |
1940 | } | |
1941 | /* | |
1942 | * If the user does not specify a custom subdir, use the session name. | |
1943 | */ | |
1944 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1945 | strlen(uris[0].subdir) == 0) { | |
1946 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1947 | name); | |
1948 | if (ret < 0) { | |
1949 | PERROR("Failed to set session name as network destination sub-directory"); | |
1950 | ret = -LTTNG_ERR_FATAL; | |
1951 | goto end; | |
1952 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1953 | /* Truncated output. */ | |
1954 | ret = -LTTNG_ERR_INVALID; | |
1955 | goto end; | |
1956 | } | |
1957 | } | |
3dd05a85 | 1958 | |
b178f53e JG |
1959 | switch (size) { |
1960 | case 0: | |
1961 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1962 | break; | |
1963 | case 1: | |
1964 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1965 | ret = -LTTNG_ERR_INVALID; | |
1966 | goto end; | |
1967 | } | |
1968 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1969 | name, | |
1970 | uris[0].dst.path); | |
1971 | break; | |
1972 | case 2: | |
1973 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1974 | name, | |
1975 | snapshot_url, | |
1976 | NULL); | |
1977 | break; | |
1978 | default: | |
1979 | ret = -LTTNG_ERR_INVALID; | |
1980 | goto end; | |
1981 | } | |
1982 | if (!descriptor) { | |
1983 | ret = -LTTNG_ERR_INVALID; | |
1984 | goto end; | |
1985 | } | |
1986 | ret_code = lttng_create_session_ext(descriptor); | |
1987 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1988 | end: | |
1989 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1990 | free(uris); |
1991 | return ret; | |
00e2e675 DG |
1992 | } |
1993 | ||
b178f53e JG |
1994 | /* |
1995 | * Create a session exclusively used for live. | |
1996 | * | |
780d4bb8 | 1997 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1998 | */ |
1999 | int lttng_create_session_live(const char *name, const char *url, | |
2000 | unsigned int timer_interval) | |
2001 | { | |
2002 | int ret; | |
2003 | enum lttng_error_code ret_code; | |
2004 | struct lttng_session_descriptor *descriptor = NULL; | |
2005 | ||
2006 | if (!name) { | |
2007 | ret = -LTTNG_ERR_INVALID; | |
2008 | goto end; | |
2009 | } | |
2010 | ||
2011 | if (url) { | |
2012 | descriptor = lttng_session_descriptor_live_network_create( | |
2013 | name, url, NULL, timer_interval); | |
2014 | } else { | |
2015 | descriptor = lttng_session_descriptor_live_create( | |
2016 | name, timer_interval); | |
2017 | } | |
2018 | if (!descriptor) { | |
2019 | ret = -LTTNG_ERR_INVALID; | |
2020 | goto end; | |
2021 | } | |
2022 | ret_code = lttng_create_session_ext(descriptor); | |
2023 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2024 | end: | |
2025 | lttng_session_descriptor_destroy(descriptor); | |
2026 | return ret; | |
2027 | } | |
2028 | ||
e20ee7c2 JD |
2029 | /* |
2030 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2031 | * |
2032 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2033 | */ |
2034 | int lttng_destroy_session(const char *session_name) | |
2035 | { | |
2036 | int ret; | |
3e3665b8 JG |
2037 | enum lttng_error_code ret_code; |
2038 | enum lttng_destruction_handle_status status; | |
2039 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2040 | |
2041 | /* | |
3e3665b8 JG |
2042 | * Stop the tracing and wait for the data to be |
2043 | * consumed. | |
e20ee7c2 JD |
2044 | */ |
2045 | ret = _lttng_stop_tracing(session_name, 1); | |
2046 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2047 | goto end; | |
2048 | } | |
2049 | ||
3e3665b8 JG |
2050 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2051 | if (ret_code != LTTNG_OK) { | |
2052 | ret = (int) -ret_code; | |
2053 | goto end; | |
2054 | } | |
a0377dfe | 2055 | LTTNG_ASSERT(handle); |
3e3665b8 JG |
2056 | |
2057 | /* Block until the completion of the destruction of the session. */ | |
2058 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2059 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2060 | ret = -LTTNG_ERR_UNK; | |
2061 | goto end; | |
2062 | } | |
2063 | ||
2064 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2065 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2066 | ret = -LTTNG_ERR_UNK; | |
2067 | goto end; | |
2068 | } | |
780d4bb8 | 2069 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2070 | end: |
3e3665b8 | 2071 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2072 | return ret; |
2073 | } | |
2074 | ||
2075 | /* | |
2076 | * Destroy the session without waiting for the data. | |
2077 | */ | |
2078 | int lttng_destroy_session_no_wait(const char *session_name) | |
2079 | { | |
3e3665b8 | 2080 | enum lttng_error_code ret_code; |
e20ee7c2 | 2081 | |
3e3665b8 | 2082 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
3204017e | 2083 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2084 | } |
2085 | ||
57167058 | 2086 | /* |
9ae110e2 JG |
2087 | * Ask the session daemon for all available sessions. |
2088 | * Sets the contents of the sessions array. | |
2089 | * Returns the number of lttng_session entries in sessions; | |
2090 | * on error, returns a negative value. | |
57167058 | 2091 | */ |
b178f53e | 2092 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2093 | { |
ca95a216 | 2094 | int ret; |
cd80958d | 2095 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2096 | const size_t session_size = sizeof(struct lttng_session) + |
2097 | sizeof(struct lttng_session_extended); | |
2098 | size_t session_count, i; | |
2099 | struct lttng_session_extended *sessions_extended_begin; | |
2100 | struct lttng_session *sessions = NULL; | |
57167058 | 2101 | |
53efb85a | 2102 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2103 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
b178f53e JG |
2104 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2105 | if (ret <= 0) { | |
b178f53e JG |
2106 | goto end; |
2107 | } | |
2108 | if (!sessions) { | |
2109 | ret = -LTTNG_ERR_FATAL; | |
2110 | goto end; | |
2111 | } | |
2112 | ||
2113 | if (ret % session_size) { | |
2114 | ret = -LTTNG_ERR_UNK; | |
2115 | free(sessions); | |
2116 | *out_sessions = NULL; | |
2117 | goto end; | |
57167058 | 2118 | } |
b178f53e JG |
2119 | session_count = (size_t) ret / session_size; |
2120 | sessions_extended_begin = (struct lttng_session_extended *) | |
2121 | (&sessions[session_count]); | |
57167058 | 2122 | |
b178f53e JG |
2123 | /* Set extended session info pointers. */ |
2124 | for (i = 0; i < session_count; i++) { | |
2125 | struct lttng_session *session = &sessions[i]; | |
2126 | struct lttng_session_extended *extended = | |
2127 | &(sessions_extended_begin[i]); | |
2128 | ||
2129 | session->extended.ptr = extended; | |
2130 | } | |
2131 | ||
2132 | ret = (int) session_count; | |
2133 | *out_sessions = sessions; | |
2134 | end: | |
2135 | return ret; | |
2136 | } | |
2137 | ||
2138 | enum lttng_error_code lttng_session_get_creation_time( | |
2139 | const struct lttng_session *session, uint64_t *creation_time) | |
2140 | { | |
2141 | enum lttng_error_code ret = LTTNG_OK; | |
2142 | struct lttng_session_extended *extended; | |
2143 | ||
2144 | if (!session || !creation_time || !session->extended.ptr) { | |
2145 | ret = LTTNG_ERR_INVALID; | |
2146 | goto end; | |
2147 | } | |
2148 | ||
2149 | extended = session->extended.ptr; | |
2150 | if (!extended->creation_time.is_set) { | |
2151 | /* Not created on the session daemon yet. */ | |
2152 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2153 | goto end; | |
2154 | } | |
2155 | *creation_time = extended->creation_time.value; | |
2156 | end: | |
2157 | return ret; | |
57167058 DG |
2158 | } |
2159 | ||
d7ba1388 MD |
2160 | int lttng_set_session_shm_path(const char *session_name, |
2161 | const char *shm_path) | |
2162 | { | |
e1b624d0 | 2163 | int ret; |
d7ba1388 MD |
2164 | struct lttcomm_session_msg lsm; |
2165 | ||
2166 | if (session_name == NULL) { | |
2167 | return -LTTNG_ERR_INVALID; | |
2168 | } | |
2169 | ||
2170 | memset(&lsm, 0, sizeof(lsm)); | |
2171 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2172 | ||
e1b624d0 | 2173 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2174 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2175 | if (ret) { |
2176 | ret = -LTTNG_ERR_INVALID; | |
2177 | goto end; | |
2178 | } | |
2179 | ||
2180 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2181 | sizeof(lsm.u.set_shm_path.shm_path)); |
e1b624d0 JG |
2182 | if (ret) { |
2183 | ret = -LTTNG_ERR_INVALID; | |
2184 | goto end; | |
2185 | } | |
d7ba1388 | 2186 | |
e1b624d0 JG |
2187 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2188 | end: | |
2189 | return ret; | |
d7ba1388 MD |
2190 | } |
2191 | ||
9f19cc17 | 2192 | /* |
9ae110e2 JG |
2193 | * Ask the session daemon for all available domains of a session. |
2194 | * Sets the contents of the domains array. | |
2195 | * Returns the number of lttng_domain entries in domains; | |
2196 | * on error, returns a negative value. | |
9f19cc17 | 2197 | */ |
330be774 | 2198 | int lttng_list_domains(const char *session_name, |
cd80958d | 2199 | struct lttng_domain **domains) |
9f19cc17 DG |
2200 | { |
2201 | int ret; | |
cd80958d DG |
2202 | struct lttcomm_session_msg lsm; |
2203 | ||
330be774 | 2204 | if (session_name == NULL) { |
e1b624d0 JG |
2205 | ret = -LTTNG_ERR_INVALID; |
2206 | goto error; | |
cd80958d | 2207 | } |
9f19cc17 | 2208 | |
53efb85a | 2209 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2210 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2211 | ||
e1b624d0 | 2212 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2213 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2214 | if (ret) { |
2215 | ret = -LTTNG_ERR_INVALID; | |
2216 | goto error; | |
2217 | } | |
cd80958d | 2218 | |
cac3069d | 2219 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2220 | if (ret < 0) { |
e1b624d0 | 2221 | goto error; |
9f19cc17 DG |
2222 | } |
2223 | ||
2224 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2225 | error: |
2226 | return ret; | |
9f19cc17 DG |
2227 | } |
2228 | ||
2229 | /* | |
9ae110e2 JG |
2230 | * Ask the session daemon for all available channels of a session. |
2231 | * Sets the contents of the channels array. | |
2232 | * Returns the number of lttng_channel entries in channels; | |
2233 | * on error, returns a negative value. | |
9f19cc17 | 2234 | */ |
cd80958d DG |
2235 | int lttng_list_channels(struct lttng_handle *handle, |
2236 | struct lttng_channel **channels) | |
9f19cc17 DG |
2237 | { |
2238 | int ret; | |
53e367f9 JG |
2239 | size_t channel_count, i; |
2240 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2241 | sizeof(struct lttng_channel_extended); |
cd80958d | 2242 | struct lttcomm_session_msg lsm; |
53e367f9 | 2243 | void *extended_at; |
cd80958d | 2244 | |
9d697d3d | 2245 | if (handle == NULL) { |
53e367f9 JG |
2246 | ret = -LTTNG_ERR_INVALID; |
2247 | goto end; | |
cd80958d DG |
2248 | } |
2249 | ||
53efb85a | 2250 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2251 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
e1b624d0 | 2252 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2253 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2254 | if (ret) { |
2255 | ret = -LTTNG_ERR_INVALID; | |
2256 | goto end; | |
2257 | } | |
9f19cc17 | 2258 | |
60160d2a | 2259 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2260 | |
cac3069d | 2261 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2262 | if (ret < 0) { |
53e367f9 JG |
2263 | goto end; |
2264 | } | |
2265 | ||
2266 | if (ret % channel_size) { | |
2267 | ret = -LTTNG_ERR_UNK; | |
2268 | free(*channels); | |
2269 | *channels = NULL; | |
2270 | goto end; | |
9f19cc17 | 2271 | } |
53e367f9 | 2272 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2273 | |
53e367f9 JG |
2274 | /* Set extended info pointers */ |
2275 | extended_at = ((void *) *channels) + | |
2276 | channel_count * sizeof(struct lttng_channel); | |
2277 | for (i = 0; i < channel_count; i++) { | |
2278 | struct lttng_channel *chan = &(*channels)[i]; | |
2279 | ||
2280 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2281 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2282 | } |
2283 | ||
2284 | ret = (int) channel_count; | |
2285 | end: | |
2286 | return ret; | |
9f19cc17 DG |
2287 | } |
2288 | ||
2289 | /* | |
9ae110e2 JG |
2290 | * Ask the session daemon for all available events of a session channel. |
2291 | * Sets the contents of the events array. | |
2292 | * Returns the number of lttng_event entries in events; | |
2293 | * on error, returns a negative value. | |
9f19cc17 | 2294 | */ |
cd80958d DG |
2295 | int lttng_list_events(struct lttng_handle *handle, |
2296 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2297 | { |
2298 | int ret; | |
e368fb43 JG |
2299 | struct lttcomm_session_msg lsm = {}; |
2300 | const struct lttcomm_event_command_header *cmd_header = NULL; | |
b4e3ceb9 | 2301 | uint32_t nb_events, i; |
e368fb43 | 2302 | const void *comm_ext_at; |
56f0bc67 | 2303 | struct lttng_dynamic_buffer listing; |
de453daa | 2304 | size_t storage_req; |
e368fb43 JG |
2305 | struct lttng_payload payload; |
2306 | struct lttng_payload payload_copy; | |
2307 | struct lttng_payload_view lsm_view = | |
2308 | lttng_payload_view_init_from_buffer( | |
2309 | (const char *) &lsm, 0, sizeof(lsm)); | |
2310 | struct lttng_buffer_view cmd_header_view; | |
2311 | struct lttng_buffer_view cmd_payload_view; | |
2312 | struct lttng_buffer_view flat_events_view; | |
2313 | struct lttng_buffer_view ext_view; | |
9f19cc17 | 2314 | |
9d697d3d DG |
2315 | /* Safety check. An handle and channel name are mandatory */ |
2316 | if (handle == NULL || channel_name == NULL) { | |
e368fb43 JG |
2317 | ret = -LTTNG_ERR_INVALID; |
2318 | goto end; | |
cd80958d DG |
2319 | } |
2320 | ||
e368fb43 JG |
2321 | lttng_payload_init(&payload); |
2322 | lttng_payload_init(&payload_copy); | |
2323 | ||
cd80958d | 2324 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
e1b624d0 | 2325 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2326 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2327 | if (ret) { |
2328 | ret = -LTTNG_ERR_INVALID; | |
2329 | goto end; | |
2330 | } | |
2331 | ||
2332 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2333 | sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2334 | if (ret) { |
2335 | ret = -LTTNG_ERR_INVALID; | |
2336 | goto end; | |
2337 | } | |
2338 | ||
60160d2a | 2339 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2340 | |
e368fb43 | 2341 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &payload); |
9f19cc17 | 2342 | if (ret < 0) { |
de453daa | 2343 | goto end; |
9f19cc17 DG |
2344 | } |
2345 | ||
e368fb43 JG |
2346 | /* |
2347 | * A copy of the payload is performed since it will be | |
2348 | * consumed twice. Consuming the same payload twice is invalid since | |
2349 | * it will cause any received file descriptor to become "shared" | |
2350 | * between different instances of the resulting objects. | |
2351 | */ | |
2352 | ret = lttng_payload_copy(&payload, &payload_copy); | |
2353 | if (ret) { | |
2354 | ret = -LTTNG_ERR_NOMEM; | |
2355 | goto end; | |
2356 | } | |
2357 | ||
2358 | cmd_header_view = lttng_buffer_view_from_dynamic_buffer( | |
2359 | &payload.buffer, 0, sizeof(*cmd_header)); | |
3e6e0df2 | 2360 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { |
e368fb43 | 2361 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
d9f484bc JG |
2362 | goto end; |
2363 | } | |
2364 | ||
e368fb43 JG |
2365 | cmd_header = (typeof(cmd_header)) cmd_header_view.data; |
2366 | ||
b4e3ceb9 PP |
2367 | /* Set number of events and free command header */ |
2368 | nb_events = cmd_header->nb_events; | |
2369 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2370 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2371 | goto end; |
b4e3ceb9 | 2372 | } |
e368fb43 JG |
2373 | |
2374 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( | |
2375 | &payload.buffer, sizeof(*cmd_header), -1); | |
b4e3ceb9 | 2376 | |
de453daa JG |
2377 | /* |
2378 | * The buffer that is returned must contain a "flat" version of | |
2379 | * the events that are returned. In other words, all pointers | |
2380 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2381 | * buffer so that the user may free everything by simply calling free() |
2382 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2383 | * compatibility. |
2384 | * | |
56f0bc67 JG |
2385 | * A first pass is performed to compute the size of the buffer that |
2386 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2387 | * the returned events so that their members always point within the |
2388 | * buffer. | |
2389 | * | |
2390 | * The layout of the returned buffer is as follows: | |
2391 | * - struct lttng_event[nb_events], | |
2392 | * - nb_events times the following: | |
2393 | * - struct lttng_event_extended, | |
2394 | * - flattened version of userspace_probe_location | |
2395 | * - filter_expression | |
2396 | * - exclusions | |
2397 | * - padding to align to 64-bits | |
2398 | */ | |
e368fb43 JG |
2399 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2400 | nb_events * sizeof(struct lttng_event), -1); | |
2401 | comm_ext_at = ext_view.data; | |
de453daa | 2402 | storage_req = nb_events * sizeof(struct lttng_event); |
e368fb43 JG |
2403 | { |
2404 | struct lttng_payload_view payload_view = | |
2405 | lttng_payload_view_from_payload(&payload, 0, -1); | |
b4e3ceb9 | 2406 | |
e368fb43 JG |
2407 | for (i = 0; i < nb_events; i++) { |
2408 | const struct lttcomm_event_extended_header *ext_comm = | |
2409 | (struct lttcomm_event_extended_header *) | |
2410 | comm_ext_at; | |
2411 | int probe_storage_req = 0; | |
b4e3ceb9 | 2412 | |
e368fb43 JG |
2413 | comm_ext_at += sizeof(*ext_comm); |
2414 | comm_ext_at += ext_comm->filter_len; | |
2415 | comm_ext_at += ext_comm->nb_exclusions * | |
2416 | LTTNG_SYMBOL_NAME_LEN; | |
2417 | ||
2418 | if (ext_comm->userspace_probe_location_len) { | |
2419 | struct lttng_userspace_probe_location | |
2420 | *probe_location = NULL; | |
2421 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2422 | &payload_view, | |
2423 | (const char *) comm_ext_at - | |
2424 | payload_view.buffer.data, | |
2425 | ext_comm->userspace_probe_location_len); | |
56f0bc67 | 2426 | |
3e6e0df2 JG |
2427 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2428 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2429 | goto end; | |
2430 | } | |
2431 | ||
e368fb43 JG |
2432 | /* |
2433 | * Create a temporary userspace probe location | |
2434 | * to determine the size needed by a "flattened" | |
2435 | * version of that same probe location. | |
2436 | */ | |
2437 | ret = lttng_userspace_probe_location_create_from_payload( | |
2438 | &probe_location_view, | |
2439 | &probe_location); | |
2440 | if (ret < 0) { | |
2441 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2442 | goto end; | |
2443 | } | |
56f0bc67 | 2444 | |
e368fb43 JG |
2445 | ret = lttng_userspace_probe_location_flatten( |
2446 | probe_location, NULL); | |
2447 | lttng_userspace_probe_location_destroy( | |
2448 | probe_location); | |
2449 | if (ret < 0) { | |
2450 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2451 | goto end; | |
2452 | } | |
56f0bc67 | 2453 | |
e368fb43 JG |
2454 | probe_storage_req = ret; |
2455 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2456 | } |
2457 | ||
e368fb43 JG |
2458 | storage_req += sizeof(struct lttng_event_extended); |
2459 | storage_req += ext_comm->filter_len; | |
2460 | storage_req += ext_comm->nb_exclusions * | |
2461 | LTTNG_SYMBOL_NAME_LEN; | |
2462 | /* Padding to ensure the flat probe is aligned. */ | |
2463 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2464 | storage_req += probe_storage_req; | |
56f0bc67 | 2465 | } |
b4e3ceb9 PP |
2466 | } |
2467 | ||
56f0bc67 JG |
2468 | lttng_dynamic_buffer_init(&listing); |
2469 | /* | |
2470 | * We must ensure that "listing" is never resized so as to preserve | |
2471 | * the validity of the flattened objects. | |
2472 | */ | |
2473 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2474 | if (ret) { | |
2475 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2476 | goto end; |
2477 | } | |
56f0bc67 | 2478 | |
e368fb43 JG |
2479 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( |
2480 | &payload_copy.buffer, sizeof(*cmd_header), -1); | |
2481 | flat_events_view = lttng_buffer_view_from_view(&cmd_payload_view, 0, | |
56f0bc67 | 2482 | nb_events * sizeof(struct lttng_event)); |
e368fb43 | 2483 | ret = lttng_dynamic_buffer_append_view(&listing, &flat_events_view); |
56f0bc67 JG |
2484 | if (ret) { |
2485 | ret = -LTTNG_ERR_NOMEM; | |
2486 | goto free_dynamic_buffer; | |
2487 | } | |
de453daa | 2488 | |
e368fb43 JG |
2489 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2490 | nb_events * sizeof(struct lttng_event), -1); | |
2491 | comm_ext_at = ext_view.data; | |
2492 | ||
2493 | { | |
2494 | struct lttng_payload_view payload_copy_view = | |
2495 | lttng_payload_view_from_payload( | |
2496 | &payload_copy, 0, -1); | |
2497 | ||
2498 | for (i = 0; i < nb_events; i++) { | |
2499 | struct lttng_event *event = (typeof(event))( | |
2500 | listing.data + | |
2501 | (sizeof(struct lttng_event) * i)); | |
2502 | const struct lttcomm_event_extended_header *ext_comm = | |
2503 | (typeof(ext_comm)) comm_ext_at; | |
2504 | struct lttng_event_extended *event_extended = | |
2505 | (typeof(event_extended))(listing.data + | |
2506 | listing.size); | |
2507 | ||
2508 | /* Insert struct lttng_event_extended. */ | |
2509 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2510 | listing.size + sizeof(*event_extended)); | |
56f0bc67 JG |
2511 | if (ret) { |
2512 | ret = -LTTNG_ERR_NOMEM; | |
2513 | goto free_dynamic_buffer; | |
2514 | } | |
e368fb43 JG |
2515 | event->extended.ptr = event_extended; |
2516 | ||
2517 | comm_ext_at += sizeof(*ext_comm); | |
2518 | ||
2519 | /* Insert filter expression. */ | |
2520 | if (ext_comm->filter_len) { | |
2521 | event_extended->filter_expression = | |
2522 | listing.data + listing.size; | |
2523 | ret = lttng_dynamic_buffer_append(&listing, | |
2524 | comm_ext_at, | |
2525 | ext_comm->filter_len); | |
2526 | if (ret) { | |
2527 | ret = -LTTNG_ERR_NOMEM; | |
2528 | goto free_dynamic_buffer; | |
2529 | } | |
2530 | comm_ext_at += ext_comm->filter_len; | |
2531 | } | |
56f0bc67 | 2532 | |
e368fb43 JG |
2533 | /* Insert exclusions. */ |
2534 | if (ext_comm->nb_exclusions) { | |
2535 | event_extended->exclusions.count = | |
2536 | ext_comm->nb_exclusions; | |
2537 | event_extended->exclusions.strings = | |
2538 | listing.data + listing.size; | |
2539 | ||
2540 | ret = lttng_dynamic_buffer_append(&listing, | |
2541 | comm_ext_at, | |
2542 | ext_comm->nb_exclusions * | |
2543 | LTTNG_SYMBOL_NAME_LEN); | |
2544 | if (ret) { | |
2545 | ret = -LTTNG_ERR_NOMEM; | |
2546 | goto free_dynamic_buffer; | |
2547 | } | |
2548 | comm_ext_at += ext_comm->nb_exclusions * | |
2549 | LTTNG_SYMBOL_NAME_LEN; | |
2550 | } | |
56f0bc67 | 2551 | |
e368fb43 JG |
2552 | /* Insert padding to align to 64-bits. */ |
2553 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2554 | ALIGN_TO(listing.size, | |
2555 | sizeof(uint64_t))); | |
56f0bc67 JG |
2556 | if (ret) { |
2557 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2558 | goto free_dynamic_buffer; |
56f0bc67 | 2559 | } |
56f0bc67 | 2560 | |
e368fb43 JG |
2561 | /* Insert flattened userspace probe location. */ |
2562 | if (ext_comm->userspace_probe_location_len) { | |
2563 | struct lttng_userspace_probe_location | |
2564 | *probe_location = NULL; | |
2565 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2566 | &payload_copy_view, | |
2567 | (const char *) comm_ext_at - | |
2568 | payload_copy_view.buffer.data, | |
2569 | ext_comm->userspace_probe_location_len); | |
2570 | ||
3e6e0df2 JG |
2571 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2572 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2573 | goto free_dynamic_buffer; | |
2574 | } | |
2575 | ||
e368fb43 JG |
2576 | ret = lttng_userspace_probe_location_create_from_payload( |
2577 | &probe_location_view, | |
2578 | &probe_location); | |
2579 | if (ret < 0) { | |
2580 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2581 | goto free_dynamic_buffer; | |
2582 | } | |
de453daa | 2583 | |
e368fb43 JG |
2584 | event_extended->probe_location = (struct lttng_userspace_probe_location |
2585 | *) (listing.data + | |
2586 | listing.size); | |
2587 | ret = lttng_userspace_probe_location_flatten( | |
2588 | probe_location, &listing); | |
2589 | lttng_userspace_probe_location_destroy( | |
2590 | probe_location); | |
2591 | if (ret < 0) { | |
2592 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2593 | goto free_dynamic_buffer; | |
2594 | } | |
56f0bc67 | 2595 | |
e368fb43 | 2596 | comm_ext_at += ext_comm->userspace_probe_location_len; |
56f0bc67 | 2597 | } |
56f0bc67 | 2598 | } |
de453daa JG |
2599 | } |
2600 | ||
56f0bc67 JG |
2601 | /* Don't reset listing buffer as we return its content. */ |
2602 | *events = (struct lttng_event *) listing.data; | |
2603 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2604 | ret = (int) nb_events; |
56f0bc67 JG |
2605 | free_dynamic_buffer: |
2606 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2607 | end: |
e368fb43 JG |
2608 | lttng_payload_reset(&payload); |
2609 | lttng_payload_reset(&payload_copy); | |
b4e3ceb9 | 2610 | return ret; |
9f19cc17 DG |
2611 | } |
2612 | ||
fac6795d | 2613 | /* |
1c8d13c8 TD |
2614 | * Sets the tracing_group variable with name. |
2615 | * This function allocates memory pointed to by tracing_group. | |
2616 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2617 | */ |
2618 | int lttng_set_tracing_group(const char *name) | |
2619 | { | |
9d697d3d | 2620 | if (name == NULL) { |
2f70b271 | 2621 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2622 | } |
2623 | ||
fac6795d | 2624 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2625 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2626 | } |
2627 | ||
2628 | return 0; | |
2629 | } | |
2630 | ||
cd80958d | 2631 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2632 | struct lttng_calibrate *calibrate) |
2633 | { | |
b812e5ca PP |
2634 | /* |
2635 | * This command was removed in LTTng 2.9. | |
2636 | */ | |
2637 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2638 | } |
2639 | ||
5edd7e09 DG |
2640 | /* |
2641 | * Set default channel attributes. | |
441c16a7 | 2642 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2643 | */ |
2644 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2645 | struct lttng_channel_attr *attr) | |
2646 | { | |
294851b0 | 2647 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2648 | |
5edd7e09 DG |
2649 | /* Safety check */ |
2650 | if (attr == NULL || domain == NULL) { | |
2651 | return; | |
2652 | } | |
2653 | ||
294851b0 | 2654 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2655 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2656 | ||
0a9c6494 DG |
2657 | /* Same for all domains. */ |
2658 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2659 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2660 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2661 | ||
5edd7e09 DG |
2662 | switch (domain->type) { |
2663 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2664 | attr->switch_timer_interval = |
2665 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2666 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2667 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2668 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2669 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2670 | if (extended) { |
2671 | extended->monitor_timer_interval = | |
2672 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2673 | extended->blocking_timeout = |
2674 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2675 | } |
5edd7e09 DG |
2676 | break; |
2677 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2678 | switch (domain->buf_type) { |
2679 | case LTTNG_BUFFER_PER_UID: | |
2680 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2681 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2682 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2683 | attr->switch_timer_interval = |
2684 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2685 | attr->read_timer_interval = | |
2686 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2687 | if (extended) { |
2688 | extended->monitor_timer_interval = | |
2689 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2690 | extended->blocking_timeout = |
2691 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2692 | } |
0a9c6494 DG |
2693 | break; |
2694 | case LTTNG_BUFFER_PER_PID: | |
2695 | default: | |
2696 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2697 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2698 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2699 | attr->switch_timer_interval = |
2700 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2701 | attr->read_timer_interval = | |
2702 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2703 | if (extended) { |
2704 | extended->monitor_timer_interval = | |
2705 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2706 | extended->blocking_timeout = |
2707 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2708 | } |
0a9c6494 DG |
2709 | break; |
2710 | } | |
5edd7e09 | 2711 | default: |
441c16a7 | 2712 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2713 | break; |
2714 | } | |
cf0bcb51 JG |
2715 | |
2716 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2717 | } |
2718 | ||
5ba3702f JG |
2719 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2720 | uint64_t *discarded_events) | |
2721 | { | |
2722 | int ret = 0; | |
cf0bcb51 | 2723 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2724 | |
2725 | if (!channel || !discarded_events) { | |
2726 | ret = -LTTNG_ERR_INVALID; | |
2727 | goto end; | |
2728 | } | |
2729 | ||
2730 | chan_ext = channel->attr.extended.ptr; | |
2731 | if (!chan_ext) { | |
2732 | /* | |
2733 | * This can happen since the lttng_channel structure is | |
2734 | * used for other tasks where this pointer is never set. | |
2735 | */ | |
2736 | *discarded_events = 0; | |
2737 | goto end; | |
2738 | } | |
2739 | ||
2740 | *discarded_events = chan_ext->discarded_events; | |
2741 | end: | |
2742 | return ret; | |
2743 | } | |
2744 | ||
2745 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2746 | uint64_t *lost_packets) | |
2747 | { | |
2748 | int ret = 0; | |
cf0bcb51 | 2749 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2750 | |
2751 | if (!channel || !lost_packets) { | |
2752 | ret = -LTTNG_ERR_INVALID; | |
2753 | goto end; | |
2754 | } | |
2755 | ||
2756 | chan_ext = channel->attr.extended.ptr; | |
2757 | if (!chan_ext) { | |
2758 | /* | |
2759 | * This can happen since the lttng_channel structure is | |
2760 | * used for other tasks where this pointer is never set. | |
2761 | */ | |
2762 | *lost_packets = 0; | |
2763 | goto end; | |
2764 | } | |
2765 | ||
2766 | *lost_packets = chan_ext->lost_packets; | |
2767 | end: | |
2768 | return ret; | |
2769 | } | |
2770 | ||
cf0bcb51 JG |
2771 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2772 | uint64_t *monitor_timer_interval) | |
2773 | { | |
2774 | int ret = 0; | |
2775 | ||
2776 | if (!chan || !monitor_timer_interval) { | |
2777 | ret = -LTTNG_ERR_INVALID; | |
2778 | goto end; | |
2779 | } | |
2780 | ||
2781 | if (!chan->attr.extended.ptr) { | |
2782 | ret = -LTTNG_ERR_INVALID; | |
2783 | goto end; | |
2784 | } | |
2785 | ||
2786 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2787 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2788 | end: | |
2789 | return ret; | |
2790 | } | |
2791 | ||
2792 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2793 | uint64_t monitor_timer_interval) | |
2794 | { | |
2795 | int ret = 0; | |
2796 | ||
2797 | if (!chan || !chan->attr.extended.ptr) { | |
2798 | ret = -LTTNG_ERR_INVALID; | |
2799 | goto end; | |
2800 | } | |
2801 | ||
2802 | ((struct lttng_channel_extended *) | |
2803 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2804 | monitor_timer_interval; | |
2805 | end: | |
2806 | return ret; | |
2807 | } | |
2808 | ||
491d1539 MD |
2809 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2810 | int64_t *blocking_timeout) | |
2811 | { | |
2812 | int ret = 0; | |
2813 | ||
2814 | if (!chan || !blocking_timeout) { | |
2815 | ret = -LTTNG_ERR_INVALID; | |
2816 | goto end; | |
2817 | } | |
2818 | ||
2819 | if (!chan->attr.extended.ptr) { | |
2820 | ret = -LTTNG_ERR_INVALID; | |
2821 | goto end; | |
2822 | } | |
2823 | ||
2824 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2825 | chan->attr.extended.ptr)->blocking_timeout; | |
2826 | end: | |
2827 | return ret; | |
2828 | } | |
2829 | ||
2830 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2831 | int64_t blocking_timeout) | |
2832 | { | |
2833 | int ret = 0; | |
2834 | int64_t msec_timeout; | |
2835 | ||
2836 | if (!chan || !chan->attr.extended.ptr) { | |
2837 | ret = -LTTNG_ERR_INVALID; | |
2838 | goto end; | |
2839 | } | |
2840 | ||
2841 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2842 | ret = -LTTNG_ERR_INVALID; | |
2843 | goto end; | |
2844 | } | |
2845 | ||
2846 | /* | |
2847 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2848 | * us to accept a narrower range of values (msecs expressed as a signed | |
2849 | * 32-bit integer). | |
2850 | */ | |
2851 | msec_timeout = blocking_timeout / 1000; | |
2852 | if (msec_timeout != (int32_t) msec_timeout) { | |
2853 | ret = -LTTNG_ERR_INVALID; | |
2854 | goto end; | |
2855 | } | |
2856 | ||
2857 | ((struct lttng_channel_extended *) | |
2858 | chan->attr.extended.ptr)->blocking_timeout = | |
2859 | blocking_timeout; | |
2860 | end: | |
2861 | return ret; | |
2862 | } | |
2863 | ||
fac6795d | 2864 | /* |
2269e89e | 2865 | * Check if session daemon is alive. |
fac6795d | 2866 | * |
2269e89e | 2867 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2868 | * On error returns a negative value. |
fac6795d | 2869 | */ |
947308c4 | 2870 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2871 | { |
2872 | int ret; | |
2873 | ||
2874 | ret = set_session_daemon_path(); | |
2875 | if (ret < 0) { | |
9ae110e2 | 2876 | /* Error. */ |
fac6795d DG |
2877 | return ret; |
2878 | } | |
2879 | ||
9d035200 | 2880 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2881 | /* |
9ae110e2 JG |
2882 | * No socket path set. Weird error which means the constructor |
2883 | * was not called. | |
2f70b271 | 2884 | */ |
a0377dfe | 2885 | abort(); |
fac6795d DG |
2886 | } |
2887 | ||
2269e89e | 2888 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2889 | if (ret < 0) { |
9ae110e2 | 2890 | /* Not alive. */ |
7d8234d9 MD |
2891 | return 0; |
2892 | } | |
7d8234d9 | 2893 | |
9ae110e2 | 2894 | /* Is alive. */ |
947308c4 | 2895 | return 1; |
fac6795d DG |
2896 | } |
2897 | ||
00e2e675 | 2898 | /* |
a4b92340 | 2899 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2900 | * |
2901 | * Return 0 on success, else a negative value. | |
2902 | */ | |
a4b92340 DG |
2903 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2904 | const char *control_url, const char *data_url) | |
00e2e675 | 2905 | { |
3dd05a85 | 2906 | int ret; |
a4b92340 | 2907 | ssize_t size; |
00e2e675 | 2908 | struct lttcomm_session_msg lsm; |
a4b92340 | 2909 | struct lttng_uri *uris = NULL; |
00e2e675 | 2910 | |
a4b92340 | 2911 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
e1b624d0 JG |
2912 | ret = -LTTNG_ERR_INVALID; |
2913 | goto error; | |
00e2e675 DG |
2914 | } |
2915 | ||
a4b92340 DG |
2916 | memset(&lsm, 0, sizeof(lsm)); |
2917 | ||
00e2e675 DG |
2918 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2919 | ||
e1b624d0 | 2920 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 2921 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2922 | if (ret) { |
2923 | ret = -LTTNG_ERR_INVALID; | |
2924 | goto error; | |
2925 | } | |
2926 | ||
60160d2a | 2927 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2928 | |
bc894455 | 2929 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2930 | if (size < 0) { |
e1b624d0 JG |
2931 | ret = -LTTNG_ERR_INVALID; |
2932 | goto error; | |
a4b92340 DG |
2933 | } |
2934 | ||
2935 | lsm.u.uri.size = size; | |
00e2e675 | 2936 | |
795a978d | 2937 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2938 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2939 | |
2940 | free(uris); | |
e1b624d0 | 2941 | error: |
3dd05a85 | 2942 | return ret; |
00e2e675 DG |
2943 | } |
2944 | ||
2945 | /* | |
9c6bda17 | 2946 | * [OBSOLETE] |
00e2e675 | 2947 | */ |
2ec40111 | 2948 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2949 | int lttng_enable_consumer(struct lttng_handle *handle) |
2950 | { | |
785d2d0d | 2951 | return -ENOSYS; |
00e2e675 DG |
2952 | } |
2953 | ||
2954 | /* | |
9c6bda17 | 2955 | * [OBSOLETE] |
00e2e675 | 2956 | */ |
2ec40111 | 2957 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2958 | int lttng_disable_consumer(struct lttng_handle *handle) |
2959 | { | |
785d2d0d | 2960 | return -ENOSYS; |
00e2e675 DG |
2961 | } |
2962 | ||
07424f16 | 2963 | /* |
b178f53e | 2964 | * [OBSOLETE] |
07424f16 | 2965 | */ |
2ec40111 SM |
2966 | int _lttng_create_session_ext(const char *name, const char *url, |
2967 | const char *datetime); | |
07424f16 DG |
2968 | int _lttng_create_session_ext(const char *name, const char *url, |
2969 | const char *datetime) | |
2970 | { | |
b178f53e | 2971 | return -ENOSYS; |
07424f16 DG |
2972 | } |
2973 | ||
806e2684 DG |
2974 | /* |
2975 | * For a given session name, this call checks if the data is ready to be read | |
2976 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2977 | * any readers. | |
2978 | */ | |
6d805429 | 2979 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2980 | { |
2981 | int ret; | |
2982 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2983 | uint8_t *pending = NULL; |
806e2684 DG |
2984 | |
2985 | if (session_name == NULL) { | |
2986 | return -LTTNG_ERR_INVALID; | |
2987 | } | |
2988 | ||
53efb85a | 2989 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2990 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2991 | |
e1b624d0 | 2992 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2993 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2994 | if (ret) { |
2995 | ret = -LTTNG_ERR_INVALID; | |
2996 | goto end; | |
2997 | } | |
806e2684 | 2998 | |
f6151c55 JG |
2999 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
3000 | if (ret < 0) { | |
3001 | goto end; | |
3002 | } else if (ret != 1) { | |
3003 | /* Unexpected payload size */ | |
3004 | ret = -LTTNG_ERR_INVALID; | |
3005 | goto end; | |
e848d36d JG |
3006 | } else if (!pending) { |
3007 | /* Internal error. */ | |
3008 | ret = -LTTNG_ERR_UNK; | |
3009 | goto end; | |
806e2684 DG |
3010 | } |
3011 | ||
f6151c55 JG |
3012 | ret = (int) *pending; |
3013 | end: | |
3014 | free(pending); | |
806e2684 DG |
3015 | return ret; |
3016 | } | |
3017 | ||
93ec662e JD |
3018 | /* |
3019 | * Regenerate the metadata for a session. | |
3020 | * Return 0 on success, a negative error code on error. | |
3021 | */ | |
eded6438 | 3022 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
3023 | { |
3024 | int ret; | |
3025 | struct lttcomm_session_msg lsm; | |
3026 | ||
3027 | if (!session_name) { | |
3028 | ret = -LTTNG_ERR_INVALID; | |
3029 | goto end; | |
3030 | } | |
3031 | ||
3032 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 3033 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 3034 | |
e1b624d0 | 3035 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 3036 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3037 | if (ret) { |
3038 | ret = -LTTNG_ERR_INVALID; | |
3039 | goto end; | |
3040 | } | |
93ec662e JD |
3041 | |
3042 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3043 | if (ret < 0) { | |
3044 | goto end; | |
3045 | } | |
3046 | ||
3047 | ret = 0; | |
3048 | end: | |
3049 | return ret; | |
3050 | } | |
3051 | ||
eded6438 JD |
3052 | /* |
3053 | * Deprecated, replaced by lttng_regenerate_metadata. | |
3054 | */ | |
3055 | int lttng_metadata_regenerate(const char *session_name) | |
3056 | { | |
3057 | return lttng_regenerate_metadata(session_name); | |
3058 | } | |
3059 | ||
c2561365 JD |
3060 | /* |
3061 | * Regenerate the statedump of a session. | |
3062 | * Return 0 on success, a negative error code on error. | |
3063 | */ | |
3064 | int lttng_regenerate_statedump(const char *session_name) | |
3065 | { | |
3066 | int ret; | |
3067 | struct lttcomm_session_msg lsm; | |
3068 | ||
3069 | if (!session_name) { | |
3070 | ret = -LTTNG_ERR_INVALID; | |
3071 | goto end; | |
3072 | } | |
3073 | ||
3074 | memset(&lsm, 0, sizeof(lsm)); | |
3075 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
3076 | ||
e1b624d0 | 3077 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 3078 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3079 | if (ret) { |
3080 | ret = -LTTNG_ERR_INVALID; | |
3081 | goto end; | |
3082 | } | |
c2561365 JD |
3083 | |
3084 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3085 | if (ret < 0) { | |
3086 | goto end; | |
3087 | } | |
3088 | ||
3089 | ret = 0; | |
3090 | end: | |
3091 | return ret; | |
3092 | } | |
3093 | ||
a5c2d2a7 JG |
3094 | static |
3095 | int _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, | |
3096 | bool generate_name) | |
a58c490f JG |
3097 | { |
3098 | int ret; | |
99608320 JR |
3099 | struct lttcomm_session_msg lsm = { |
3100 | .cmd_type = LTTNG_REGISTER_TRIGGER, | |
a5c2d2a7 | 3101 | .u.trigger.is_trigger_anonymous = !name && !generate_name, |
99608320 JR |
3102 | }; |
3103 | struct lttcomm_session_msg *message_lsm; | |
3104 | struct lttng_payload message; | |
3105 | struct lttng_payload reply; | |
242388e4 | 3106 | struct lttng_trigger *reply_trigger = NULL; |
9124c630 | 3107 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
3108 | const struct lttng_credentials user_creds = { |
3109 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3110 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3111 | }; | |
a5c2d2a7 JG |
3112 | const char *unused_trigger_name = NULL; |
3113 | enum lttng_trigger_status trigger_status; | |
99608320 JR |
3114 | |
3115 | lttng_payload_init(&message); | |
3116 | lttng_payload_init(&reply); | |
a58c490f JG |
3117 | |
3118 | if (!trigger) { | |
3119 | ret = -LTTNG_ERR_INVALID; | |
3120 | goto end; | |
3121 | } | |
3122 | ||
a5c2d2a7 JG |
3123 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
3124 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
3125 | /* Re-using already registered trigger. */ | |
3126 | ret = -LTTNG_ERR_INVALID; | |
3127 | goto end; | |
3128 | } | |
3129 | ||
3130 | if (name) { | |
3131 | trigger_status = lttng_trigger_set_name(trigger, name); | |
3132 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3133 | ret = -LTTNG_ERR_NOMEM; | |
3134 | goto end; | |
3135 | } | |
3136 | } | |
3137 | ||
64eafdf6 JR |
3138 | if (!trigger->creds.uid.is_set) { |
3139 | /* Use the client's credentials as the trigger credentials. */ | |
3140 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3141 | } else { | |
3142 | /* | |
3143 | * Validate that either the current trigger credentials and the | |
3144 | * client credentials are identical or that the current user is | |
3145 | * root. The root user can register, unregister triggers for | |
3146 | * himself and other users. | |
3147 | * | |
3148 | * This check is also present on the sessiond side, using the | |
3149 | * credentials passed on the socket. These check are all | |
3150 | * "safety" checks. | |
3151 | */ | |
3152 | const struct lttng_credentials *trigger_creds = | |
3153 | lttng_trigger_get_credentials(trigger); | |
3154 | ||
3155 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3156 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3157 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 3158 | goto end_unset_name; |
64eafdf6 JR |
3159 | } |
3160 | } | |
3161 | } | |
3162 | ||
a58c490f | 3163 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3164 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 3165 | goto end_unset_name; |
a58c490f JG |
3166 | } |
3167 | ||
9124c630 JR |
3168 | domain_type = lttng_trigger_get_underlying_domain_type_restriction( |
3169 | trigger); | |
3170 | ||
3171 | lsm.domain.type = domain_type; | |
3172 | ||
97285430 JG |
3173 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3174 | if (ret) { | |
3175 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 3176 | goto end_unset_name; |
97285430 | 3177 | } |
99608320 | 3178 | |
99608320 | 3179 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3180 | if (ret < 0) { |
a58c490f | 3181 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3182 | goto end_unset_name; |
a58c490f JG |
3183 | } |
3184 | ||
b22f4f54 JG |
3185 | /* |
3186 | * This is needed to populate the trigger object size for the command | |
3187 | * header. | |
3188 | */ | |
3189 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3190 | ||
99608320 JR |
3191 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3192 | ||
3193 | { | |
3194 | struct lttng_payload_view message_view = | |
3195 | lttng_payload_view_from_payload( | |
3196 | &message, 0, -1); | |
3197 | ||
3198 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3199 | &message_view); | |
3200 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3201 | if (ret < 0) { | |
a5c2d2a7 | 3202 | goto end_unset_name; |
99608320 JR |
3203 | } |
3204 | } | |
3205 | ||
242388e4 JR |
3206 | { |
3207 | struct lttng_payload_view reply_view = | |
3208 | lttng_payload_view_from_payload( | |
3209 | &reply, 0, reply.buffer.size); | |
3210 | ||
3211 | ret = lttng_trigger_create_from_payload( | |
3212 | &reply_view, &reply_trigger); | |
3213 | if (ret < 0) { | |
a5c2d2a7 JG |
3214 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3215 | goto end_unset_name; | |
242388e4 JR |
3216 | } |
3217 | } | |
3218 | ||
a5c2d2a7 JG |
3219 | if (name || generate_name) { |
3220 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3221 | if (ret < 0) { | |
3222 | ret = -LTTNG_ERR_NOMEM; | |
3223 | goto end; | |
3224 | } | |
242388e4 JR |
3225 | } |
3226 | ||
99608320 | 3227 | ret = 0; |
a5c2d2a7 JG |
3228 | goto end; |
3229 | ||
3230 | end_unset_name: | |
3231 | trigger_status = lttng_trigger_set_name(trigger, NULL); | |
3232 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3233 | ret = -LTTNG_ERR_UNK; | |
3234 | } | |
a58c490f | 3235 | end: |
99608320 JR |
3236 | lttng_payload_reset(&message); |
3237 | lttng_payload_reset(&reply); | |
242388e4 | 3238 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3239 | return ret; |
3240 | } | |
3241 | ||
a5c2d2a7 JG |
3242 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3243 | { | |
3244 | /* Register an anonymous trigger. */ | |
3245 | return _lttng_register_trigger(trigger, NULL, false); | |
3246 | } | |
3247 | ||
3248 | enum lttng_error_code lttng_register_trigger_with_name( | |
3249 | struct lttng_trigger *trigger, const char *name) | |
3250 | { | |
3251 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3252 | ||
3253 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3254 | } | |
3255 | ||
3256 | enum lttng_error_code lttng_register_trigger_with_automatic_name( | |
3257 | struct lttng_trigger *trigger) | |
3258 | { | |
3259 | const int ret = _lttng_register_trigger(trigger, false, true); | |
3260 | ||
3261 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3262 | } | |
3263 | ||
b99a0cb3 JG |
3264 | enum lttng_error_code lttng_error_query_execute( |
3265 | const struct lttng_error_query *query, | |
3266 | const struct lttng_endpoint *endpoint, | |
3267 | struct lttng_error_query_results **results) | |
3268 | { | |
3269 | int ret; | |
3270 | enum lttng_error_code ret_code; | |
3271 | struct lttcomm_session_msg lsm = { | |
3272 | .cmd_type = LTTNG_EXECUTE_ERROR_QUERY, | |
3273 | }; | |
3274 | struct lttng_payload message; | |
3275 | struct lttng_payload reply; | |
3276 | struct lttcomm_session_msg *message_lsm; | |
3277 | ||
3278 | lttng_payload_init(&message); | |
3279 | lttng_payload_init(&reply); | |
3280 | ||
3281 | if (!query || !results) { | |
3282 | ret_code = LTTNG_ERR_INVALID; | |
3283 | goto end; | |
3284 | } | |
3285 | ||
3286 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3287 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3288 | goto end; | |
3289 | } | |
3290 | ||
3291 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3292 | if (ret) { | |
3293 | ret_code = LTTNG_ERR_NOMEM; | |
3294 | goto end; | |
3295 | } | |
3296 | ||
3297 | ret = lttng_error_query_serialize(query, &message); | |
3298 | if (ret) { | |
3299 | ret_code = LTTNG_ERR_UNK; | |
3300 | goto end; | |
3301 | } | |
3302 | ||
3303 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3304 | message_lsm->u.error_query.length = | |
3305 | (uint32_t) message.buffer.size - sizeof(lsm); | |
3306 | ||
3307 | { | |
3308 | struct lttng_payload_view message_view = | |
3309 | lttng_payload_view_from_payload( | |
3310 | &message, 0, -1); | |
3311 | ||
3312 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3313 | &message_view); | |
3314 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3315 | if (ret < 0) { | |
3316 | ret_code = -ret; | |
3317 | goto end; | |
3318 | } | |
3319 | } | |
3320 | ||
3321 | { | |
3322 | ssize_t reply_create_ret; | |
3323 | struct lttng_payload_view reply_view = | |
3324 | lttng_payload_view_from_payload( | |
3325 | &reply, 0, reply.buffer.size); | |
3326 | ||
3327 | reply_create_ret = lttng_error_query_results_create_from_payload( | |
3328 | &reply_view, results); | |
3329 | if (reply_create_ret < 0) { | |
3330 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3331 | goto end; | |
3332 | } | |
3333 | } | |
3334 | ||
3335 | ret_code = LTTNG_OK; | |
3336 | end: | |
3337 | lttng_payload_reset(&message); | |
3338 | lttng_payload_reset(&reply); | |
3339 | return ret_code; | |
3340 | } | |
3341 | ||
b61776fb | 3342 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3343 | { |
3344 | int ret; | |
3345 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3346 | struct lttcomm_session_msg *message_lsm; |
3347 | struct lttng_payload message; | |
3348 | struct lttng_payload reply; | |
b61776fb | 3349 | struct lttng_trigger *copy = NULL; |
64eafdf6 JR |
3350 | const struct lttng_credentials user_creds = { |
3351 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3352 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3353 | }; | |
99608320 JR |
3354 | |
3355 | lttng_payload_init(&message); | |
3356 | lttng_payload_init(&reply); | |
a58c490f JG |
3357 | |
3358 | if (!trigger) { | |
3359 | ret = -LTTNG_ERR_INVALID; | |
3360 | goto end; | |
3361 | } | |
3362 | ||
b61776fb SM |
3363 | copy = lttng_trigger_copy(trigger); |
3364 | if (!copy) { | |
3365 | ret = -LTTNG_ERR_UNK; | |
3366 | goto end; | |
3367 | } | |
3368 | ||
3369 | if (!copy->creds.uid.is_set) { | |
3370 | /* Use the client credentials as the trigger credentials */ | |
3371 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3372 | } else { |
3373 | /* | |
3374 | * Validate that either the current trigger credentials and the | |
3375 | * client credentials are identical or that the current user is | |
3376 | * root. The root user can register, unregister triggers for | |
3377 | * himself and other users. | |
3378 | * | |
3379 | * This check is also present on the sessiond side, using the | |
3380 | * credentials passed on the socket. These check are all | |
3381 | * "safety" checks. | |
3382 | */ | |
3383 | const struct lttng_credentials *trigger_creds = | |
b61776fb | 3384 | lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3385 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3386 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3387 | ret = -LTTNG_ERR_EPERM; | |
3388 | goto end; | |
3389 | } | |
3390 | } | |
3391 | } | |
3392 | ||
b61776fb | 3393 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3394 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3395 | goto end; |
3396 | } | |
3397 | ||
99608320 JR |
3398 | memset(&lsm, 0, sizeof(lsm)); |
3399 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3400 | ||
97285430 JG |
3401 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3402 | if (ret) { | |
3403 | ret = -LTTNG_ERR_NOMEM; | |
3404 | goto end; | |
3405 | } | |
99608320 | 3406 | |
b61776fb | 3407 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3408 | if (ret < 0) { |
a58c490f JG |
3409 | ret = -LTTNG_ERR_UNK; |
3410 | goto end; | |
3411 | } | |
3412 | ||
b0a79813 FD |
3413 | /* |
3414 | * This is needed to populate the trigger object size for the command | |
3415 | * header and number of fds sent. | |
3416 | */ | |
3417 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3418 | ||
99608320 JR |
3419 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3420 | ||
3421 | { | |
3422 | struct lttng_payload_view message_view = | |
3423 | lttng_payload_view_from_payload( | |
3424 | &message, 0, -1); | |
3425 | ||
3426 | /* | |
3427 | * Update the message header with the number of fd that will be | |
3428 | * sent. | |
3429 | */ | |
3430 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3431 | &message_view); | |
3432 | ||
3433 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3434 | if (ret < 0) { | |
3435 | goto end; | |
3436 | } | |
3437 | } | |
3438 | ||
3439 | ret = 0; | |
a58c490f | 3440 | end: |
b61776fb | 3441 | lttng_trigger_destroy(copy); |
99608320 JR |
3442 | lttng_payload_reset(&message); |
3443 | lttng_payload_reset(&reply); | |
a58c490f JG |
3444 | return ret; |
3445 | } | |
3446 | ||
fbc9f37d JR |
3447 | /* |
3448 | * Ask the session daemon for all registered triggers for the current user. | |
3449 | * | |
3450 | * Allocates and return an lttng_triggers set. | |
3451 | * On error, returns a suitable lttng_error_code. | |
3452 | */ | |
3453 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3454 | { | |
3455 | int ret; | |
3456 | enum lttng_error_code ret_code = LTTNG_OK; | |
3457 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS }; | |
3458 | struct lttng_triggers *local_triggers = NULL; | |
3459 | struct lttng_payload reply; | |
3460 | struct lttng_payload_view lsm_view = | |
3461 | lttng_payload_view_init_from_buffer( | |
3462 | (const char *) &lsm, 0, sizeof(lsm)); | |
3463 | ||
3464 | lttng_payload_init(&reply); | |
3465 | ||
3466 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3467 | if (ret < 0) { | |
3468 | ret_code = (enum lttng_error_code) -ret; | |
3469 | goto end; | |
3470 | } | |
3471 | ||
3472 | { | |
3473 | struct lttng_payload_view reply_view = | |
3474 | lttng_payload_view_from_payload( | |
3475 | &reply, 0, reply.buffer.size); | |
3476 | ||
3477 | ret = lttng_triggers_create_from_payload( | |
3478 | &reply_view, &local_triggers); | |
3479 | if (ret < 0) { | |
3480 | ret_code = LTTNG_ERR_FATAL; | |
3481 | goto end; | |
3482 | } | |
3483 | } | |
3484 | ||
3485 | *triggers = local_triggers; | |
3486 | local_triggers = NULL; | |
3487 | end: | |
3488 | lttng_payload_reset(&reply); | |
3489 | lttng_triggers_destroy(local_triggers); | |
3490 | return ret_code; | |
3491 | } | |
3492 | ||
fac6795d | 3493 | /* |
9ae110e2 | 3494 | * lib constructor. |
fac6795d | 3495 | */ |
b2b89e8a | 3496 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3497 | { |
3498 | /* Set default session group */ | |
bbccc3d2 | 3499 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3500 | } |
49cca668 DG |
3501 | |
3502 | /* | |
9ae110e2 | 3503 | * lib destructor. |
49cca668 | 3504 | */ |
b2b89e8a | 3505 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3506 | { |
3507 | free(tracing_group); | |
3508 | } |