Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
21cf9b6b | 6 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa | 7 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
ab5be9fa | 9 | * SPDX-License-Identifier: LGPL-2.1-only |
82a3637f | 10 | * |
fac6795d DG |
11 | */ |
12 | ||
6c1c0768 | 13 | #define _LGPL_SOURCE |
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> |
1cbd136b | 21 | #include <common/align.h> |
990570ed | 22 | #include <common/common.h> |
edf4b93e | 23 | #include <common/compat/errno.h> |
15e37663 | 24 | #include <common/compat/string.h> |
990570ed | 25 | #include <common/defaults.h> |
fe489250 | 26 | #include <common/dynamic-array.h> |
b99a0cb3 | 27 | #include <common/dynamic-buffer.h> |
9e620ea7 | 28 | #include <common/payload-view.h> |
b99a0cb3 | 29 | #include <common/payload.h> |
db758600 | 30 | #include <common/sessiond-comm/sessiond-comm.h> |
159b042f | 31 | #include <common/tracker.h> |
fe489250 | 32 | #include <common/unix.h> |
a4b92340 | 33 | #include <common/uri.h> |
feb0f3e5 | 34 | #include <common/utils.h> |
a58c490f | 35 | #include <lttng/channel-internal.h> |
159b042f JG |
36 | #include <lttng/destruction-handle.h> |
37 | #include <lttng/endpoint.h> | |
b99a0cb3 | 38 | #include <lttng/error-query-internal.h> |
de453daa | 39 | #include <lttng/event-internal.h> |
159b042f | 40 | #include <lttng/health-internal.h> |
b99a0cb3 | 41 | #include <lttng/lttng-error.h> |
159b042f | 42 | #include <lttng/lttng.h> |
b178f53e | 43 | #include <lttng/session-descriptor-internal.h> |
159b042f JG |
44 | #include <lttng/session-internal.h> |
45 | #include <lttng/trigger/trigger-internal.h> | |
46 | #include <lttng/userspace-probe-internal.h> | |
fac6795d | 47 | |
b99a0cb3 | 48 | #include "lttng-ctl-helper.h" |
e4d2f27a | 49 | #include <common/filter/filter-ast.h> |
348ddc5c | 50 | #include <common/filter/filter-parser.hpp> |
e4d2f27a | 51 | #include <common/filter/memstream.h> |
53a80697 | 52 | |
60160d2a JG |
53 | #define COPY_DOMAIN_PACKED(dst, src) \ |
54 | do { \ | |
55 | struct lttng_domain _tmp_domain; \ | |
56 | \ | |
57 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
58 | dst = _tmp_domain; \ | |
59 | } while (0) | |
53a80697 | 60 | |
fac6795d | 61 | /* Socket to session daemon for communication */ |
3e3665b8 | 62 | static int sessiond_socket = -1; |
fac6795d DG |
63 | static char sessiond_sock_path[PATH_MAX]; |
64 | ||
fac6795d DG |
65 | /* Variables */ |
66 | static char *tracing_group; | |
67 | static int connected; | |
68 | ||
97e19046 DG |
69 | /* Global */ |
70 | ||
71 | /* | |
72 | * Those two variables are used by error.h to silent or control the verbosity of | |
73 | * error message. They are global to the library so application linking with it | |
74 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 | 75 | */ |
4bd69c5f SM |
76 | LTTNG_EXPORT int lttng_opt_quiet; |
77 | LTTNG_EXPORT int lttng_opt_verbose; | |
78 | LTTNG_EXPORT int lttng_opt_mi; | |
97e19046 | 79 | |
fac6795d | 80 | /* |
cd80958d | 81 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 82 | * |
cd80958d DG |
83 | * If domain is unknown, default domain will be the kernel. |
84 | */ | |
cac3069d DG |
85 | 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 | ||
4bd69c5f | 119 | DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str((lttcomm_sessiond_command) lsm->cmd_type), |
19f912db | 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 | 247 | int lttng_check_tracing_group(void) |
947308c4 | 248 | { |
28ab59d0 | 249 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
250 | int grp_list_size, grp_id, i; |
251 | int ret = -1; | |
6c71277b | 252 | const char *grp_name = tracing_group; |
947308c4 DG |
253 | |
254 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 255 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 256 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
257 | goto end; |
258 | } | |
259 | ||
260 | /* Get number of supplementary group IDs */ | |
261 | grp_list_size = getgroups(0, NULL); | |
262 | if (grp_list_size < 0) { | |
6f04ed72 | 263 | PERROR("getgroups"); |
947308c4 DG |
264 | goto end; |
265 | } | |
266 | ||
267 | /* Alloc group list of the right size */ | |
4bd69c5f | 268 | grp_list = (gid_t *) zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 269 | if (!grp_list) { |
6f04ed72 | 270 | PERROR("malloc"); |
00795392 MD |
271 | goto end; |
272 | } | |
947308c4 | 273 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 274 | if (grp_id < 0) { |
6f04ed72 | 275 | PERROR("getgroups"); |
947308c4 DG |
276 | goto free_list; |
277 | } | |
278 | ||
279 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 280 | if (grp_list[i] == tracing_gid) { |
2269e89e | 281 | ret = 1; |
947308c4 DG |
282 | break; |
283 | } | |
284 | } | |
285 | ||
286 | free_list: | |
287 | free(grp_list); | |
288 | ||
289 | end: | |
290 | return ret; | |
291 | } | |
292 | ||
09b72f7a FD |
293 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
294 | { | |
295 | int ret; | |
296 | long num_cpu; | |
297 | size_t best_mem_info; | |
298 | size_t num_bytes_requested_total; | |
299 | ||
300 | /* | |
301 | * Get the number of CPU currently online to compute the amount of | |
302 | * memory needed to create a buffer for every CPU. | |
303 | */ | |
304 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
305 | if (num_cpu == -1) { | |
306 | goto error; | |
307 | } | |
308 | ||
309 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
310 | ||
311 | /* | |
312 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
313 | * reliable estimate we can get but it is only exposed by the kernel | |
314 | * since 3.14. (See Linux kernel commit: | |
315 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
316 | */ | |
317 | ret = utils_get_memory_available(&best_mem_info); | |
318 | if (ret >= 0) { | |
319 | goto success; | |
320 | } | |
321 | ||
322 | /* | |
323 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
324 | * is a sanity check for obvious user error. | |
325 | */ | |
326 | ret = utils_get_memory_total(&best_mem_info); | |
327 | if (ret >= 0) { | |
328 | goto success; | |
329 | } | |
330 | ||
331 | error: | |
332 | return -1; | |
333 | success: | |
334 | return best_mem_info >= num_bytes_requested_total; | |
335 | } | |
336 | ||
947308c4 | 337 | /* |
2269e89e DG |
338 | * Try connect to session daemon with sock_path. |
339 | * | |
340 | * Return 0 on success, else -1 | |
341 | */ | |
342 | static int try_connect_sessiond(const char *sock_path) | |
343 | { | |
344 | int ret; | |
345 | ||
346 | /* If socket exist, we check if the daemon listens for connect. */ | |
347 | ret = access(sock_path, F_OK); | |
348 | if (ret < 0) { | |
349 | /* Not alive */ | |
2f70b271 | 350 | goto error; |
2269e89e DG |
351 | } |
352 | ||
353 | ret = lttcomm_connect_unix_sock(sock_path); | |
354 | if (ret < 0) { | |
9ae110e2 | 355 | /* Not alive. */ |
2f70b271 | 356 | goto error; |
2269e89e DG |
357 | } |
358 | ||
359 | ret = lttcomm_close_unix_sock(ret); | |
360 | if (ret < 0) { | |
6f04ed72 | 361 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
362 | } |
363 | ||
364 | return 0; | |
2f70b271 DG |
365 | |
366 | error: | |
367 | return -1; | |
2269e89e DG |
368 | } |
369 | ||
370 | /* | |
2f70b271 DG |
371 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
372 | * variable. | |
373 | * | |
374 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
375 | * is somehow too long or ENOMEM). | |
947308c4 DG |
376 | */ |
377 | static int set_session_daemon_path(void) | |
378 | { | |
9ae110e2 | 379 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
380 | uid_t uid; |
381 | ||
382 | uid = getuid(); | |
947308c4 | 383 | |
2269e89e DG |
384 | if (uid != 0) { |
385 | /* Are we in the tracing group ? */ | |
6c71277b | 386 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
387 | } |
388 | ||
c295ec41 | 389 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 JG |
390 | const int ret = lttng_strncpy(sessiond_sock_path, |
391 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
392 | sizeof(sessiond_sock_path)); | |
393 | ||
394 | if (ret) { | |
395 | goto error; | |
396 | } | |
08a9c49f | 397 | } |
2269e89e | 398 | |
08a9c49f | 399 | if (uid != 0) { |
c617c0c6 MD |
400 | int ret; |
401 | ||
08a9c49f | 402 | if (in_tgroup) { |
9ae110e2 | 403 | /* Tracing group. */ |
08a9c49f TD |
404 | ret = try_connect_sessiond(sessiond_sock_path); |
405 | if (ret >= 0) { | |
406 | goto end; | |
2269e89e | 407 | } |
08a9c49f | 408 | /* Global session daemon not available... */ |
2269e89e | 409 | } |
08a9c49f TD |
410 | /* ...or not in tracing group (and not root), default */ |
411 | ||
412 | /* | |
9ae110e2 JG |
413 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
414 | * is too small; | |
415 | * With GNU C >= 2.1, snprintf returns the required size | |
416 | * (excluding closing null) | |
08a9c49f TD |
417 | */ |
418 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 419 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 420 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 421 | goto error; |
947308c4 | 422 | } |
947308c4 | 423 | } |
08a9c49f | 424 | end: |
947308c4 | 425 | return 0; |
2f70b271 DG |
426 | |
427 | error: | |
428 | return -1; | |
947308c4 DG |
429 | } |
430 | ||
65beb5ff | 431 | /* |
9ae110e2 | 432 | * Connect to the LTTng session daemon. |
65beb5ff | 433 | * |
3e3665b8 | 434 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 435 | */ |
ca806b0b | 436 | int connect_sessiond(void) |
65beb5ff DG |
437 | { |
438 | int ret; | |
439 | ||
440 | ret = set_session_daemon_path(); | |
441 | if (ret < 0) { | |
2f70b271 | 442 | goto error; |
65beb5ff DG |
443 | } |
444 | ||
9ae110e2 | 445 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
446 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
447 | if (ret < 0) { | |
2f70b271 | 448 | goto error; |
65beb5ff DG |
449 | } |
450 | ||
3e3665b8 | 451 | return ret; |
2f70b271 DG |
452 | |
453 | error: | |
454 | return -1; | |
65beb5ff DG |
455 | } |
456 | ||
3e3665b8 JG |
457 | static void reset_global_sessiond_connection_state(void) |
458 | { | |
459 | sessiond_socket = -1; | |
460 | connected = 0; | |
461 | } | |
462 | ||
65beb5ff | 463 | /* |
1c8d13c8 | 464 | * Clean disconnect from the session daemon. |
9ae110e2 | 465 | * |
1c8d13c8 | 466 | * On success, return 0. On error, return -1. |
65beb5ff DG |
467 | */ |
468 | static int disconnect_sessiond(void) | |
469 | { | |
470 | int ret = 0; | |
471 | ||
472 | if (connected) { | |
473 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 474 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
475 | } |
476 | ||
477 | return ret; | |
478 | } | |
479 | ||
795a978d PP |
480 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
481 | size_t *user_len) | |
482 | { | |
483 | int ret = 0; | |
484 | void *buf = NULL; | |
485 | ||
486 | if (len) { | |
487 | if (!user_len) { | |
488 | ret = -LTTNG_ERR_INVALID; | |
489 | goto end; | |
490 | } | |
491 | ||
492 | buf = zmalloc(len); | |
493 | if (!buf) { | |
494 | ret = -ENOMEM; | |
495 | goto end; | |
496 | } | |
497 | ||
498 | ret = recv_data_sessiond(buf, len); | |
499 | if (ret < 0) { | |
500 | goto end; | |
501 | } | |
502 | ||
503 | if (!user_buf) { | |
504 | ret = -LTTNG_ERR_INVALID; | |
505 | goto end; | |
506 | } | |
507 | ||
508 | /* Move ownership of command header buffer to user. */ | |
509 | *user_buf = buf; | |
510 | buf = NULL; | |
511 | *user_len = len; | |
512 | } else { | |
513 | /* No command header. */ | |
514 | if (user_len) { | |
515 | *user_len = 0; | |
516 | } | |
517 | ||
518 | if (user_buf) { | |
519 | *user_buf = NULL; | |
520 | } | |
521 | } | |
522 | ||
523 | end: | |
524 | free(buf); | |
525 | return ret; | |
526 | } | |
527 | ||
35a6fdb7 | 528 | /* |
cd80958d | 529 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
530 | * Takes extra var. len. data and file descriptors as input to send to the |
531 | * session daemon. | |
65beb5ff | 532 | * |
af87c45a | 533 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 534 | */ |
a04d53fc FD |
535 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
536 | const int *fds, size_t nb_fd, const void *vardata, | |
537 | size_t vardata_len, void **user_payload_buf, | |
538 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
539 | { |
540 | int ret; | |
795a978d | 541 | size_t payload_len; |
cd80958d | 542 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
543 | |
544 | ret = connect_sessiond(); | |
545 | if (ret < 0) { | |
2f70b271 | 546 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 547 | goto end; |
3e3665b8 JG |
548 | } else { |
549 | sessiond_socket = ret; | |
550 | connected = 1; | |
65beb5ff DG |
551 | } |
552 | ||
cd80958d | 553 | ret = send_session_msg(lsm); |
65beb5ff | 554 | if (ret < 0) { |
2f70b271 | 555 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
556 | goto end; |
557 | } | |
53a80697 | 558 | /* Send var len data */ |
795a978d | 559 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 560 | if (ret < 0) { |
2f70b271 | 561 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
562 | goto end; |
563 | } | |
65beb5ff | 564 | |
a04d53fc FD |
565 | /* Send fds */ |
566 | ret = send_session_fds(fds, nb_fd); | |
567 | if (ret < 0) { | |
568 | /* Ret value is a valid lttng error code. */ | |
569 | goto end; | |
570 | } | |
571 | ||
65beb5ff DG |
572 | /* Get header from data transmission */ |
573 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
574 | if (ret < 0) { | |
2f70b271 | 575 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
576 | goto end; |
577 | } | |
578 | ||
579 | /* Check error code if OK */ | |
f73fabfd | 580 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
581 | ret = -llm.ret_code; |
582 | goto end; | |
583 | } | |
584 | ||
795a978d PP |
585 | /* Get command header from data transmission */ |
586 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
587 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 588 | if (ret < 0) { |
65beb5ff DG |
589 | goto end; |
590 | } | |
591 | ||
795a978d PP |
592 | /* Get payload from data transmission */ |
593 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
594 | &payload_len); | |
595 | if (ret < 0) { | |
83009e5e DG |
596 | goto end; |
597 | } | |
598 | ||
795a978d | 599 | ret = llm.data_size; |
65beb5ff DG |
600 | |
601 | end: | |
602 | disconnect_sessiond(); | |
603 | return ret; | |
604 | } | |
605 | ||
e368fb43 JG |
606 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, |
607 | struct lttng_payload *reply) | |
608 | { | |
609 | int ret; | |
610 | struct lttcomm_lttng_msg llm; | |
fe489250 | 611 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 | 612 | |
a0377dfe FD |
613 | LTTNG_ASSERT(reply->buffer.size == 0); |
614 | LTTNG_ASSERT(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); | |
e368fb43 JG |
615 | |
616 | ret = connect_sessiond(); | |
617 | if (ret < 0) { | |
618 | ret = -LTTNG_ERR_NO_SESSIOND; | |
619 | goto end; | |
620 | } else { | |
621 | sessiond_socket = ret; | |
622 | connected = 1; | |
623 | } | |
624 | ||
625 | /* Send command to session daemon */ | |
626 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data, | |
627 | message->buffer.size); | |
628 | if (ret < 0) { | |
629 | ret = -LTTNG_ERR_FATAL; | |
630 | goto end; | |
631 | } | |
632 | ||
fe489250 JG |
633 | if (fd_count > 0) { |
634 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, | |
635 | message); | |
636 | if (ret < 0) { | |
637 | ret = -LTTNG_ERR_FATAL; | |
638 | goto end; | |
639 | } | |
e368fb43 JG |
640 | } |
641 | ||
642 | /* Get header from data transmission */ | |
643 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
644 | if (ret < 0) { | |
645 | /* Ret value is a valid lttng error code. */ | |
646 | goto end; | |
647 | } | |
648 | ||
649 | llm = *((typeof(llm) *) reply->buffer.data); | |
650 | ||
651 | /* Check error code if OK */ | |
652 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
653 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
654 | /* Invalid error code received. */ | |
655 | ret = -LTTNG_ERR_UNK; | |
656 | } else { | |
657 | ret = -llm.ret_code; | |
658 | } | |
e368fb43 JG |
659 | goto end; |
660 | } | |
661 | ||
662 | if (llm.cmd_header_size > 0) { | |
663 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
664 | if (ret < 0) { | |
665 | goto end; | |
666 | } | |
667 | } | |
668 | ||
669 | /* Get command header from data transmission */ | |
670 | if (llm.data_size > 0) { | |
671 | ret = recv_payload_sessiond(reply, llm.data_size); | |
672 | if (ret < 0) { | |
673 | goto end; | |
674 | } | |
675 | } | |
676 | ||
677 | if (llm.fd_count > 0) { | |
fe489250 JG |
678 | ret = lttcomm_recv_payload_fds_unix_sock( |
679 | sessiond_socket, llm.fd_count, reply); | |
680 | if (ret < 0) { | |
e368fb43 JG |
681 | goto end; |
682 | } | |
683 | } | |
684 | ||
685 | /* Don't return the llm header to the caller. */ | |
686 | memmove(reply->buffer.data, reply->buffer.data + sizeof(llm), | |
687 | reply->buffer.size - sizeof(llm)); | |
688 | ret = lttng_dynamic_buffer_set_size( | |
689 | &reply->buffer, reply->buffer.size - sizeof(llm)); | |
690 | if (ret) { | |
691 | /* Can't happen as size is reduced. */ | |
692 | abort(); | |
693 | } | |
694 | ||
695 | ret = reply->buffer.size; | |
696 | ||
697 | end: | |
698 | disconnect_sessiond(); | |
699 | return ret; | |
700 | } | |
701 | ||
9f19cc17 | 702 | /* |
cd80958d | 703 | * Create lttng handle and return pointer. |
9ae110e2 | 704 | * |
1c8d13c8 | 705 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 706 | */ |
cd80958d DG |
707 | struct lttng_handle *lttng_create_handle(const char *session_name, |
708 | struct lttng_domain *domain) | |
9f19cc17 | 709 | { |
e1b624d0 | 710 | int ret; |
2f70b271 DG |
711 | struct lttng_handle *handle = NULL; |
712 | ||
4bd69c5f | 713 | handle = (lttng_handle *) zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 714 | if (handle == NULL) { |
2f70b271 | 715 | PERROR("malloc handle"); |
cd80958d DG |
716 | goto end; |
717 | } | |
718 | ||
719 | /* Copy session name */ | |
e1b624d0 JG |
720 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
721 | sizeof(handle->session_name)); | |
722 | if (ret) { | |
723 | goto error; | |
724 | } | |
cd80958d | 725 | |
95681498 JG |
726 | /* Copy lttng domain or leave initialized to 0. */ |
727 | if (domain) { | |
728 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
729 | } | |
cd80958d DG |
730 | |
731 | end: | |
732 | return handle; | |
e1b624d0 JG |
733 | error: |
734 | free(handle); | |
735 | return NULL; | |
cd80958d DG |
736 | } |
737 | ||
738 | /* | |
739 | * Destroy handle by free(3) the pointer. | |
740 | */ | |
741 | void lttng_destroy_handle(struct lttng_handle *handle) | |
742 | { | |
0e428499 | 743 | free(handle); |
eb354453 DG |
744 | } |
745 | ||
d9800920 DG |
746 | /* |
747 | * Register an outside consumer. | |
9ae110e2 | 748 | * |
1c8d13c8 | 749 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
750 | */ |
751 | int lttng_register_consumer(struct lttng_handle *handle, | |
752 | const char *socket_path) | |
753 | { | |
e1b624d0 | 754 | int ret; |
d9800920 DG |
755 | struct lttcomm_session_msg lsm; |
756 | ||
2f70b271 | 757 | if (handle == NULL || socket_path == NULL) { |
e1b624d0 JG |
758 | ret = -LTTNG_ERR_INVALID; |
759 | goto end; | |
2f70b271 DG |
760 | } |
761 | ||
53efb85a | 762 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 763 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
e1b624d0 | 764 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 765 | sizeof(lsm.session.name)); |
e1b624d0 JG |
766 | if (ret) { |
767 | ret = -LTTNG_ERR_INVALID; | |
768 | goto end; | |
769 | } | |
770 | ||
60160d2a | 771 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 772 | |
e1b624d0 JG |
773 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
774 | sizeof(lsm.u.reg.path)); | |
775 | if (ret) { | |
776 | ret = -LTTNG_ERR_INVALID; | |
777 | goto end; | |
778 | } | |
d9800920 | 779 | |
e1b624d0 JG |
780 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
781 | end: | |
782 | return ret; | |
d9800920 DG |
783 | } |
784 | ||
1df4dedd | 785 | /* |
9ae110e2 JG |
786 | * Start tracing for all traces of the session. |
787 | * | |
788 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 789 | */ |
6a4f824d | 790 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 791 | { |
e1b624d0 | 792 | int ret; |
cd80958d DG |
793 | struct lttcomm_session_msg lsm; |
794 | ||
6a4f824d | 795 | if (session_name == NULL) { |
e1b624d0 JG |
796 | ret = -LTTNG_ERR_INVALID; |
797 | goto end; | |
cd80958d DG |
798 | } |
799 | ||
53efb85a | 800 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 801 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 802 | |
e1b624d0 JG |
803 | ret = lttng_strncpy(lsm.session.name, session_name, |
804 | sizeof(lsm.session.name)); | |
805 | if (ret) { | |
806 | ret = -LTTNG_ERR_INVALID; | |
807 | goto end; | |
808 | } | |
cd80958d | 809 | |
e1b624d0 JG |
810 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
811 | end: | |
812 | return ret; | |
f3ed775e | 813 | } |
1df4dedd DG |
814 | |
815 | /* | |
38ee087f | 816 | * Stop tracing for all traces of the session. |
f3ed775e | 817 | */ |
38ee087f | 818 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 819 | { |
38ee087f | 820 | int ret, data_ret; |
cd80958d DG |
821 | struct lttcomm_session_msg lsm; |
822 | ||
6a4f824d | 823 | if (session_name == NULL) { |
e1b624d0 JG |
824 | ret = -LTTNG_ERR_INVALID; |
825 | goto error; | |
6a4f824d DG |
826 | } |
827 | ||
53efb85a | 828 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 829 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 830 | |
e1b624d0 JG |
831 | ret = lttng_strncpy(lsm.session.name, session_name, |
832 | sizeof(lsm.session.name)); | |
833 | if (ret) { | |
834 | ret = -LTTNG_ERR_INVALID; | |
835 | goto error; | |
836 | } | |
cd80958d | 837 | |
cac3069d | 838 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
839 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
840 | goto error; | |
841 | } | |
842 | ||
843 | if (!wait) { | |
844 | goto end; | |
845 | } | |
846 | ||
38ee087f DG |
847 | /* Check for data availability */ |
848 | do { | |
6d805429 | 849 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
850 | if (data_ret < 0) { |
851 | /* Return the data available call error. */ | |
852 | ret = data_ret; | |
853 | goto error; | |
854 | } | |
855 | ||
856 | /* | |
9ae110e2 JG |
857 | * Data sleep time before retrying (in usec). Don't sleep if the |
858 | * call returned value indicates availability. | |
38ee087f | 859 | */ |
6d805429 | 860 | if (data_ret) { |
c8f61fd4 | 861 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 862 | } |
6d805429 | 863 | } while (data_ret != 0); |
38ee087f | 864 | |
38ee087f DG |
865 | end: |
866 | error: | |
867 | return ret; | |
868 | } | |
869 | ||
870 | /* | |
871 | * Stop tracing and wait for data availability. | |
872 | */ | |
873 | int lttng_stop_tracing(const char *session_name) | |
874 | { | |
875 | return _lttng_stop_tracing(session_name, 1); | |
876 | } | |
877 | ||
878 | /* | |
879 | * Stop tracing but _don't_ wait for data availability. | |
880 | */ | |
881 | int lttng_stop_tracing_no_wait(const char *session_name) | |
882 | { | |
883 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
884 | } |
885 | ||
886 | /* | |
601d5acf DG |
887 | * Add context to a channel. |
888 | * | |
889 | * If the given channel is NULL, add the contexts to all channels. | |
890 | * The event_name param is ignored. | |
af87c45a DG |
891 | * |
892 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 893 | */ |
cd80958d | 894 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
895 | struct lttng_event_context *ctx, const char *event_name, |
896 | const char *channel_name) | |
d65106b1 | 897 | { |
2001793c JG |
898 | int ret; |
899 | size_t len = 0; | |
900 | char *buf = NULL; | |
cd80958d DG |
901 | struct lttcomm_session_msg lsm; |
902 | ||
9ae110e2 | 903 | /* Safety check. Both are mandatory. */ |
9d697d3d | 904 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
905 | ret = -LTTNG_ERR_INVALID; |
906 | goto end; | |
cd80958d DG |
907 | } |
908 | ||
441c16a7 | 909 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
910 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
911 | ||
85076754 | 912 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
913 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
914 | sizeof(lsm.u.context.channel_name)); | |
915 | if (ret) { | |
916 | ret = -LTTNG_ERR_INVALID; | |
917 | goto end; | |
85076754 | 918 | } |
cd80958d | 919 | |
60160d2a | 920 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
e1b624d0 | 921 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 922 | sizeof(lsm.session.name)); |
e1b624d0 JG |
923 | if (ret) { |
924 | ret = -LTTNG_ERR_INVALID; | |
925 | goto end; | |
926 | } | |
cd80958d | 927 | |
2001793c JG |
928 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
929 | size_t provider_len, ctx_len; | |
930 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
931 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
932 | ||
933 | if (!provider_name || !ctx_name) { | |
934 | ret = -LTTNG_ERR_INVALID; | |
935 | goto end; | |
936 | } | |
937 | ||
938 | provider_len = strlen(provider_name); | |
939 | if (provider_len == 0) { | |
940 | ret = -LTTNG_ERR_INVALID; | |
941 | goto end; | |
942 | } | |
943 | lsm.u.context.provider_name_len = provider_len; | |
944 | ||
945 | ctx_len = strlen(ctx_name); | |
946 | if (ctx_len == 0) { | |
947 | ret = -LTTNG_ERR_INVALID; | |
948 | goto end; | |
949 | } | |
950 | lsm.u.context.context_name_len = ctx_len; | |
951 | ||
952 | len = provider_len + ctx_len; | |
4bd69c5f | 953 | buf = (char *) zmalloc(len); |
2001793c JG |
954 | if (!buf) { |
955 | ret = -LTTNG_ERR_NOMEM; | |
956 | goto end; | |
957 | } | |
958 | ||
959 | memcpy(buf, provider_name, provider_len); | |
960 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
961 | } | |
962 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
963 | |
964 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
965 | /* | |
966 | * Don't leak application addresses to the sessiond. | |
967 | * This is only necessary when ctx is for an app ctx otherwise | |
968 | * the values inside the union (type & config) are overwritten. | |
969 | */ | |
970 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
971 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
972 | } | |
2001793c | 973 | |
795a978d | 974 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
975 | end: |
976 | free(buf); | |
977 | return ret; | |
d65106b1 DG |
978 | } |
979 | ||
f3ed775e | 980 | /* |
9ae110e2 JG |
981 | * Enable event(s) for a channel. |
982 | * | |
983 | * If no event name is specified, all events are enabled. | |
984 | * If no channel name is specified, the default 'channel0' is used. | |
985 | * | |
986 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 987 | */ |
cd80958d | 988 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 989 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 990 | { |
f8a96544 JI |
991 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
992 | NULL, 0, NULL); | |
1df4dedd DG |
993 | } |
994 | ||
53a80697 | 995 | /* |
025faf73 | 996 | * Create or enable an event with a filter expression. |
178191b3 | 997 | * |
53a80697 MD |
998 | * Return negative error value on error. |
999 | * Return size of returned session payload data if OK. | |
1000 | */ | |
025faf73 | 1001 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 1002 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
1003 | const char *filter_expression) |
1004 | { | |
f8a96544 JI |
1005 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
1006 | filter_expression, 0, NULL); | |
53a80697 MD |
1007 | } |
1008 | ||
347c5ab5 | 1009 | /* |
0e115563 | 1010 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1011 | * NULL if not applicable. |
1012 | * | |
1013 | * An event with NO loglevel and the name is * will return NULL. | |
1014 | */ | |
0e115563 | 1015 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1016 | { |
1017 | int err; | |
0e115563 | 1018 | char *agent_filter = NULL; |
347c5ab5 | 1019 | |
a0377dfe | 1020 | LTTNG_ASSERT(ev); |
347c5ab5 DG |
1021 | |
1022 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1023 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1024 | if (filter) { |
0e115563 | 1025 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
1026 | ev->name); |
1027 | } else { | |
0e115563 | 1028 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1029 | } |
1030 | if (err < 0) { | |
1031 | PERROR("asprintf"); | |
6a556f7b | 1032 | goto error; |
347c5ab5 DG |
1033 | } |
1034 | } | |
1035 | ||
1036 | /* Add loglevel filtering if any for the JUL domain. */ | |
1037 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1038 | const char *op; |
347c5ab5 DG |
1039 | |
1040 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1041 | op = ">="; | |
1042 | } else { | |
1043 | op = "=="; | |
1044 | } | |
1045 | ||
0e115563 | 1046 | if (filter || agent_filter) { |
6a556f7b JG |
1047 | char *new_filter; |
1048 | ||
fb0edb23 | 1049 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 1050 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 1051 | ev->loglevel); |
0e115563 DG |
1052 | if (agent_filter) { |
1053 | free(agent_filter); | |
6a556f7b | 1054 | } |
0e115563 | 1055 | agent_filter = new_filter; |
347c5ab5 | 1056 | } else { |
0e115563 | 1057 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
1058 | ev->loglevel); |
1059 | } | |
1060 | if (err < 0) { | |
1061 | PERROR("asprintf"); | |
6a556f7b | 1062 | goto error; |
347c5ab5 DG |
1063 | } |
1064 | } | |
1065 | ||
0e115563 | 1066 | return agent_filter; |
6a556f7b | 1067 | error: |
0e115563 | 1068 | free(agent_filter); |
6a556f7b | 1069 | return NULL; |
347c5ab5 DG |
1070 | } |
1071 | ||
93deb080 JI |
1072 | /* |
1073 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1074 | * If no event name is specified, all events are enabled. | |
1075 | * If no channel name is specified, the default name is used. | |
1076 | * If filter expression is not NULL, the filter is set for the event. | |
1077 | * If exclusion count is not zero, the exclusions are set for the event. | |
1078 | * Returns size of returned session payload data or a negative error code. | |
1079 | */ | |
1080 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1081 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1082 | const char *original_filter_expression, |
93deb080 JI |
1083 | int exclusion_count, char **exclusion_list) |
1084 | { | |
1085 | struct lttcomm_session_msg lsm; | |
e368fb43 JG |
1086 | struct lttng_payload payload; |
1087 | int ret = 0, i; | |
137b9942 | 1088 | unsigned int free_filter_expression = 0; |
93deb080 | 1089 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1090 | |
6a0838b7 YL |
1091 | /* |
1092 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1093 | * a variable-length payload from where to send the data. |
6a0838b7 | 1094 | */ |
e368fb43 | 1095 | lttng_payload_init(&payload); |
ec005ec6 | 1096 | |
e9efbcd3 JG |
1097 | /* |
1098 | * Cast as non-const since we may replace the filter expression | |
1099 | * by a dynamically allocated string. Otherwise, the original | |
1100 | * string is not modified. | |
1101 | */ | |
1102 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1103 | |
1104 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1105 | ret = -LTTNG_ERR_INVALID; |
1106 | goto error; | |
93deb080 JI |
1107 | } |
1108 | ||
9ae110e2 JG |
1109 | /* |
1110 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1111 | * anyway, so treat this corner-case early to eliminate |
1112 | * lttng_fmemopen error for 0-byte allocation. | |
1113 | */ | |
1114 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1115 | ret = -LTTNG_ERR_INVALID; |
1116 | goto error; | |
93deb080 JI |
1117 | } |
1118 | ||
1119 | memset(&lsm, 0, sizeof(lsm)); | |
1120 | ||
1121 | /* If no channel name, send empty string. */ | |
e1b624d0 JG |
1122 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", |
1123 | sizeof(lsm.u.enable.channel_name)); | |
1124 | if (ret) { | |
1125 | ret = -LTTNG_ERR_INVALID; | |
1126 | goto error; | |
93deb080 JI |
1127 | } |
1128 | ||
18a720cd MD |
1129 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1130 | if (ev->name[0] == '\0') { | |
e1b624d0 JG |
1131 | /* Enable all events. */ |
1132 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
a0377dfe | 1133 | LTTNG_ASSERT(ret == 0); |
6565421f | 1134 | } |
93deb080 | 1135 | |
60160d2a | 1136 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1137 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1138 | ||
e1b624d0 | 1139 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
93deb080 | 1140 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1141 | if (ret) { |
1142 | ret = -LTTNG_ERR_INVALID; | |
1143 | goto error; | |
1144 | } | |
1145 | ||
93deb080 JI |
1146 | lsm.u.enable.exclusion_count = exclusion_count; |
1147 | lsm.u.enable.bytecode_len = 0; | |
1148 | ||
9ae110e2 | 1149 | /* Parse filter expression. */ |
5cdb6027 | 1150 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1151 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1152 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1153 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1154 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1155 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1156 | char *agent_filter; | |
64226865 | 1157 | |
347c5ab5 | 1158 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1159 | agent_filter = set_agent_filter(filter_expression, ev); |
1160 | if (!agent_filter) { | |
137b9942 | 1161 | if (!filter_expression) { |
9ae110e2 JG |
1162 | /* |
1163 | * No JUL and no filter, just skip | |
1164 | * everything below. | |
1165 | */ | |
137b9942 DG |
1166 | goto ask_sessiond; |
1167 | } | |
64226865 DG |
1168 | } else { |
1169 | /* | |
9ae110e2 JG |
1170 | * With an agent filter, the original filter has |
1171 | * been added to it thus replace the filter | |
1172 | * expression. | |
64226865 | 1173 | */ |
0e115563 | 1174 | filter_expression = agent_filter; |
e9efbcd3 | 1175 | free_filter_expression = 1; |
9b21e6d5 | 1176 | } |
9b21e6d5 | 1177 | } |
93deb080 | 1178 | |
e4d2f27a | 1179 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1180 | if (ret) { |
137b9942 | 1181 | goto filter_error; |
93deb080 | 1182 | } |
e4d2f27a JR |
1183 | |
1184 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1185 | + bytecode_get_len(&ctx->bytecode->b); | |
1186 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6b453b5e JG |
1187 | } |
1188 | ||
e368fb43 JG |
1189 | ret = lttng_dynamic_buffer_set_capacity(&payload.buffer, |
1190 | lsm.u.enable.bytecode_len + | |
1191 | lsm.u.enable.expression_len + | |
1192 | LTTNG_SYMBOL_NAME_LEN * | |
1193 | exclusion_count); | |
15e37663 | 1194 | if (ret) { |
6b453b5e | 1195 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1196 | goto mem_error; |
6b453b5e | 1197 | } |
137b9942 | 1198 | |
9ae110e2 | 1199 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1200 | for (i = 0; i < exclusion_count; i++) { |
1201 | size_t exclusion_len; | |
1202 | ||
53a5c209 | 1203 | exclusion_len = lttng_strnlen(exclusion_list[i], |
15e37663 JG |
1204 | LTTNG_SYMBOL_NAME_LEN); |
1205 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1206 | /* Exclusion is not NULL-terminated. */ | |
1207 | ret = -LTTNG_ERR_INVALID; | |
1208 | goto mem_error; | |
1209 | } | |
1210 | ||
e368fb43 | 1211 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
53a5c209 FD |
1212 | exclusion_list[i], exclusion_len); |
1213 | if (ret) { | |
1214 | goto mem_error; | |
1215 | } | |
1216 | ||
1217 | /* | |
1218 | * Padding the rest of the entry with zeros. Every exclusion | |
1219 | * entries take LTTNG_SYMBOL_NAME_LEN bytes in the buffer. | |
1220 | */ | |
1221 | ret = lttng_dynamic_buffer_set_size(&payload.buffer, | |
1222 | LTTNG_SYMBOL_NAME_LEN * (i + 1)); | |
15e37663 JG |
1223 | if (ret) { |
1224 | goto mem_error; | |
1225 | } | |
6b453b5e | 1226 | } |
15e37663 | 1227 | |
9ae110e2 | 1228 | /* Add filter expression next. */ |
15e37663 | 1229 | if (filter_expression) { |
e368fb43 | 1230 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1231 | filter_expression, lsm.u.enable.expression_len); |
1232 | if (ret) { | |
1233 | goto mem_error; | |
1234 | } | |
6b453b5e | 1235 | } |
9ae110e2 | 1236 | /* Add filter bytecode next. */ |
137b9942 | 1237 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
e368fb43 | 1238 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1239 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); |
1240 | if (ret) { | |
1241 | goto mem_error; | |
1242 | } | |
1243 | } | |
1244 | if (ev->extended.ptr) { | |
1245 | struct lttng_event_extended *ev_ext = | |
1246 | (struct lttng_event_extended *) ev->extended.ptr; | |
1247 | ||
1248 | if (ev_ext->probe_location) { | |
1249 | /* | |
1250 | * lttng_userspace_probe_location_serialize returns the | |
1251 | * number of bytes that was appended to the buffer. | |
1252 | */ | |
1253 | ret = lttng_userspace_probe_location_serialize( | |
e368fb43 | 1254 | ev_ext->probe_location, &payload); |
56f0bc67 | 1255 | if (ret < 0) { |
15e37663 JG |
1256 | goto mem_error; |
1257 | } | |
1258 | ||
15e37663 JG |
1259 | /* |
1260 | * Set the size of the userspace probe location element | |
1261 | * of the buffer so that the receiving side knows where | |
1262 | * to split it. | |
1263 | */ | |
1264 | lsm.u.enable.userspace_probe_location_len = ret; | |
1265 | } | |
93deb080 JI |
1266 | } |
1267 | ||
e368fb43 JG |
1268 | { |
1269 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1270 | &payload, 0, -1); | |
fe489250 | 1271 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1272 | int fd_to_send; |
1273 | ||
1274 | if (fd_count < 0) { | |
1275 | goto mem_error; | |
1276 | } | |
1277 | ||
a0377dfe | 1278 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); |
e368fb43 | 1279 | if (fd_count == 1) { |
e2fc8e9d | 1280 | struct fd_handle *h = |
fe489250 JG |
1281 | lttng_payload_view_pop_fd_handle(&view); |
1282 | ||
e2fc8e9d | 1283 | if (!h) { |
e368fb43 JG |
1284 | goto mem_error; |
1285 | } | |
1286 | ||
e2fc8e9d SM |
1287 | fd_to_send = fd_handle_get_fd(h); |
1288 | fd_handle_put(h); | |
e368fb43 JG |
1289 | } |
1290 | ||
1291 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1292 | fd_count ? &fd_to_send : NULL, fd_count, | |
1293 | view.buffer.size ? view.buffer.data : NULL, | |
1294 | view.buffer.size, NULL, NULL, 0); | |
1295 | } | |
93deb080 | 1296 | |
7ca1dc6f DG |
1297 | mem_error: |
1298 | if (filter_expression && ctx) { | |
93deb080 JI |
1299 | filter_bytecode_free(ctx); |
1300 | filter_ir_free(ctx); | |
1301 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1302 | } |
1303 | filter_error: | |
1304 | if (free_filter_expression) { | |
1305 | /* | |
9ae110e2 JG |
1306 | * The filter expression has been replaced and must be freed as |
1307 | * it is not the original filter expression received as a | |
1308 | * parameter. | |
7ca1dc6f DG |
1309 | */ |
1310 | free(filter_expression); | |
93deb080 | 1311 | } |
137b9942 DG |
1312 | error: |
1313 | /* | |
9ae110e2 JG |
1314 | * Return directly to the caller and don't ask the sessiond since |
1315 | * something went wrong in the parsing of data above. | |
137b9942 | 1316 | */ |
e368fb43 | 1317 | lttng_payload_reset(&payload); |
93deb080 | 1318 | return ret; |
3e1c9ff7 DG |
1319 | |
1320 | ask_sessiond: | |
1321 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1322 | return ret; | |
93deb080 JI |
1323 | } |
1324 | ||
6e911cad MD |
1325 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1326 | struct lttng_event *ev, const char *channel_name, | |
1327 | const char *original_filter_expression) | |
1df4dedd | 1328 | { |
cd80958d | 1329 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1330 | char *varlen_data; |
1331 | int ret = 0; | |
1332 | unsigned int free_filter_expression = 0; | |
1333 | struct filter_parser_ctx *ctx = NULL; | |
1334 | /* | |
1335 | * Cast as non-const since we may replace the filter expression | |
1336 | * by a dynamically allocated string. Otherwise, the original | |
1337 | * string is not modified. | |
1338 | */ | |
1339 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1340 | |
6e911cad MD |
1341 | if (handle == NULL || ev == NULL) { |
1342 | ret = -LTTNG_ERR_INVALID; | |
1343 | goto error; | |
1344 | } | |
1345 | ||
9ae110e2 JG |
1346 | /* |
1347 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1348 | * anyway, so treat this corner-case early to eliminate |
1349 | * lttng_fmemopen error for 0-byte allocation. | |
1350 | */ | |
1351 | if (filter_expression && filter_expression[0] == '\0') { | |
1352 | ret = -LTTNG_ERR_INVALID; | |
1353 | goto error; | |
cd80958d DG |
1354 | } |
1355 | ||
441c16a7 MD |
1356 | memset(&lsm, 0, sizeof(lsm)); |
1357 | ||
85076754 | 1358 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
1359 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", |
1360 | sizeof(lsm.u.disable.channel_name)); | |
1361 | if (ret) { | |
1362 | ret = -LTTNG_ERR_INVALID; | |
1363 | goto error; | |
eb354453 DG |
1364 | } |
1365 | ||
18a720cd | 1366 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1367 | |
60160d2a | 1368 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1369 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1370 | ||
e1b624d0 | 1371 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 1372 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1373 | if (ret) { |
1374 | ret = -LTTNG_ERR_INVALID; | |
1375 | goto error; | |
1376 | } | |
1377 | ||
6e911cad | 1378 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1379 | |
6e911cad MD |
1380 | /* |
1381 | * For the JUL domain, a filter is enforced except for the | |
1382 | * disable all event. This is done to avoid having the event in | |
1383 | * all sessions thus filtering by logger name. | |
1384 | */ | |
1385 | if (filter_expression == NULL && | |
1386 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1387 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1388 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1389 | goto ask_sessiond; |
1390 | } | |
1391 | ||
1392 | /* | |
1393 | * We have a filter, so we need to set up a variable-length | |
1394 | * memory block from where to send the data. | |
1395 | */ | |
1396 | ||
1397 | /* Parse filter expression */ | |
1398 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1399 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1400 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1401 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1402 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1403 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1404 | char *agent_filter; | |
6e911cad MD |
1405 | |
1406 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1407 | agent_filter = set_agent_filter(filter_expression, ev); |
1408 | if (!agent_filter) { | |
6e911cad | 1409 | if (!filter_expression) { |
9ae110e2 JG |
1410 | /* |
1411 | * No JUL and no filter, just skip | |
1412 | * everything below. | |
1413 | */ | |
6e911cad MD |
1414 | goto ask_sessiond; |
1415 | } | |
1416 | } else { | |
1417 | /* | |
9ae110e2 JG |
1418 | * With a JUL filter, the original filter has |
1419 | * been added to it thus replace the filter | |
1420 | * expression. | |
6e911cad | 1421 | */ |
0e115563 | 1422 | filter_expression = agent_filter; |
6e911cad MD |
1423 | free_filter_expression = 1; |
1424 | } | |
1425 | } | |
1426 | ||
e4d2f27a | 1427 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad MD |
1428 | if (ret) { |
1429 | goto filter_error; | |
1430 | } | |
e4d2f27a JR |
1431 | |
1432 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1433 | + bytecode_get_len(&ctx->bytecode->b); | |
1434 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6e911cad MD |
1435 | } |
1436 | ||
4bd69c5f | 1437 | varlen_data = (char *) zmalloc(lsm.u.disable.bytecode_len |
6e911cad MD |
1438 | + lsm.u.disable.expression_len); |
1439 | if (!varlen_data) { | |
1440 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1441 | goto mem_error; | |
1442 | } | |
1443 | ||
9ae110e2 | 1444 | /* Add filter expression. */ |
6e911cad MD |
1445 | if (lsm.u.disable.expression_len != 0) { |
1446 | memcpy(varlen_data, | |
1447 | filter_expression, | |
1448 | lsm.u.disable.expression_len); | |
1449 | } | |
9ae110e2 | 1450 | /* Add filter bytecode next. */ |
6e911cad MD |
1451 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1452 | memcpy(varlen_data | |
1453 | + lsm.u.disable.expression_len, | |
1454 | &ctx->bytecode->b, | |
1455 | lsm.u.disable.bytecode_len); | |
1456 | } | |
1457 | ||
795a978d | 1458 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1459 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1460 | free(varlen_data); | |
1461 | ||
1462 | mem_error: | |
1463 | if (filter_expression && ctx) { | |
1464 | filter_bytecode_free(ctx); | |
1465 | filter_ir_free(ctx); | |
1466 | filter_parser_ctx_free(ctx); | |
1467 | } | |
1468 | filter_error: | |
1469 | if (free_filter_expression) { | |
1470 | /* | |
9ae110e2 JG |
1471 | * The filter expression has been replaced and must be freed as |
1472 | * it is not the original filter expression received as a | |
1473 | * parameter. | |
6e911cad MD |
1474 | */ |
1475 | free(filter_expression); | |
1476 | } | |
1477 | error: | |
1478 | /* | |
9ae110e2 JG |
1479 | * Return directly to the caller and don't ask the sessiond since |
1480 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1481 | */ |
1482 | return ret; | |
1483 | ||
1484 | ask_sessiond: | |
1485 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1486 | return ret; | |
1487 | } | |
1488 | ||
1489 | /* | |
9ae110e2 JG |
1490 | * Disable event(s) of a channel and domain. |
1491 | * If no event name is specified, all events are disabled. | |
1492 | * If no channel name is specified, the default 'channel0' is used. | |
1493 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1494 | */ |
1495 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1496 | const char *channel_name) | |
1497 | { | |
e1b624d0 | 1498 | int ret; |
6e911cad MD |
1499 | struct lttng_event ev; |
1500 | ||
1501 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1502 | ev.loglevel = -1; |
6e911cad | 1503 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1504 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1505 | if (ret) { | |
1506 | ret = -LTTNG_ERR_INVALID; | |
1507 | goto end; | |
1508 | } | |
1509 | ||
1510 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1511 | end: | |
1512 | return ret; | |
1df4dedd DG |
1513 | } |
1514 | ||
cf0bcb51 JG |
1515 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1516 | { | |
1517 | struct lttng_channel *channel = NULL; | |
1518 | struct lttng_channel_extended *extended = NULL; | |
1519 | ||
1520 | if (!domain) { | |
1521 | goto error; | |
1522 | } | |
1523 | ||
1524 | /* Validate domain. */ | |
1525 | switch (domain->type) { | |
1526 | case LTTNG_DOMAIN_UST: | |
1527 | switch (domain->buf_type) { | |
1528 | case LTTNG_BUFFER_PER_UID: | |
1529 | case LTTNG_BUFFER_PER_PID: | |
1530 | break; | |
1531 | default: | |
1532 | goto error; | |
1533 | } | |
1534 | break; | |
1535 | case LTTNG_DOMAIN_KERNEL: | |
1536 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1537 | goto error; | |
1538 | } | |
1539 | break; | |
1540 | default: | |
1541 | goto error; | |
1542 | } | |
1543 | ||
4bd69c5f | 1544 | channel = (lttng_channel *) zmalloc(sizeof(*channel)); |
cf0bcb51 JG |
1545 | if (!channel) { |
1546 | goto error; | |
1547 | } | |
1548 | ||
4bd69c5f | 1549 | extended = (lttng_channel_extended *) zmalloc(sizeof(*extended)); |
cf0bcb51 JG |
1550 | if (!extended) { |
1551 | goto error; | |
1552 | } | |
1553 | ||
1554 | channel->attr.extended.ptr = extended; | |
1555 | ||
1556 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1557 | return channel; | |
1558 | error: | |
1559 | free(channel); | |
1560 | free(extended); | |
1561 | return NULL; | |
1562 | } | |
1563 | ||
1564 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1565 | { | |
1566 | if (!channel) { | |
1567 | return; | |
1568 | } | |
1569 | ||
1570 | if (channel->attr.extended.ptr) { | |
1571 | free(channel->attr.extended.ptr); | |
1572 | } | |
1573 | free(channel); | |
1574 | } | |
1575 | ||
1df4dedd | 1576 | /* |
9ae110e2 JG |
1577 | * Enable channel per domain |
1578 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1579 | */ |
cd80958d | 1580 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1581 | struct lttng_channel *in_chan) |
a5c5a2bd | 1582 | { |
e1b624d0 | 1583 | int ret; |
cd80958d | 1584 | struct lttcomm_session_msg lsm; |
09b72f7a | 1585 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1586 | |
9ae110e2 | 1587 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1588 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1589 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1590 | } |
1591 | ||
441c16a7 | 1592 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1593 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1594 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1595 | |
cf0bcb51 JG |
1596 | if (!in_chan->attr.extended.ptr) { |
1597 | struct lttng_channel *channel; | |
1598 | struct lttng_channel_extended *extended; | |
7d29a247 | 1599 | |
cf0bcb51 JG |
1600 | channel = lttng_channel_create(&handle->domain); |
1601 | if (!channel) { | |
1602 | return -LTTNG_ERR_NOMEM; | |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * Create a new channel in order to use default extended | |
1607 | * attribute values. | |
1608 | */ | |
1609 | extended = (struct lttng_channel_extended *) | |
1610 | channel->attr.extended.ptr; | |
1611 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1612 | lttng_channel_destroy(channel); | |
1613 | } else { | |
1614 | struct lttng_channel_extended *extended; | |
1615 | ||
1616 | extended = (struct lttng_channel_extended *) | |
1617 | in_chan->attr.extended.ptr; | |
1618 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1619 | } | |
cd80958d | 1620 | |
09b72f7a FD |
1621 | /* |
1622 | * Verify that the amount of memory required to create the requested | |
1623 | * buffer is available on the system at the moment. | |
1624 | */ | |
1625 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1626 | lsm.u.channel.chan.attr.subbuf_size; | |
1627 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1628 | return -LTTNG_ERR_NOMEM; | |
1629 | } | |
1630 | ||
cf0bcb51 | 1631 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1632 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1633 | |
e1b624d0 JG |
1634 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1635 | sizeof(lsm.session.name)); | |
1636 | if (ret) { | |
1637 | ret = -LTTNG_ERR_INVALID; | |
1638 | goto end; | |
1639 | } | |
cd80958d | 1640 | |
e1b624d0 JG |
1641 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1642 | end: | |
1643 | return ret; | |
8c0faa1d | 1644 | } |
1df4dedd | 1645 | |
2ef84c95 | 1646 | /* |
9ae110e2 JG |
1647 | * All tracing will be stopped for registered events of the channel. |
1648 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1649 | */ |
cd80958d | 1650 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1651 | { |
e1b624d0 | 1652 | int ret; |
cd80958d DG |
1653 | struct lttcomm_session_msg lsm; |
1654 | ||
9ae110e2 | 1655 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1656 | if (handle == NULL || name == NULL) { |
2f70b271 | 1657 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1658 | } |
1659 | ||
441c16a7 MD |
1660 | memset(&lsm, 0, sizeof(lsm)); |
1661 | ||
cd80958d | 1662 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1663 | |
e1b624d0 | 1664 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1665 | sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1666 | if (ret) { |
1667 | ret = -LTTNG_ERR_INVALID; | |
1668 | goto end; | |
1669 | } | |
9d697d3d | 1670 | |
60160d2a | 1671 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1672 | |
e1b624d0 JG |
1673 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1674 | sizeof(lsm.session.name)); | |
1675 | if (ret) { | |
1676 | ret = -LTTNG_ERR_INVALID; | |
1677 | goto end; | |
1678 | } | |
cd80958d | 1679 | |
e1b624d0 JG |
1680 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1681 | end: | |
1682 | return ret; | |
ca95a216 DG |
1683 | } |
1684 | ||
fac6795d | 1685 | /* |
9ae110e2 JG |
1686 | * Lists all available tracepoints of domain. |
1687 | * Sets the contents of the events array. | |
1688 | * Returns the number of lttng_event entries in events; | |
1689 | * on error, returns a negative value. | |
fac6795d | 1690 | */ |
cd80958d | 1691 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1692 | struct lttng_event **events) |
fac6795d | 1693 | { |
052da939 | 1694 | int ret; |
cd80958d DG |
1695 | struct lttcomm_session_msg lsm; |
1696 | ||
9d697d3d | 1697 | if (handle == NULL) { |
2f70b271 | 1698 | return -LTTNG_ERR_INVALID; |
cd80958d | 1699 | } |
fac6795d | 1700 | |
53efb85a | 1701 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1702 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1703 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1704 | |
cac3069d | 1705 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1706 | if (ret < 0) { |
1707 | return ret; | |
eb354453 | 1708 | } |
fac6795d | 1709 | |
9f19cc17 | 1710 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1711 | } |
1712 | ||
f37d259d | 1713 | /* |
9ae110e2 JG |
1714 | * Lists all available tracepoint fields of domain. |
1715 | * Sets the contents of the event field array. | |
1716 | * Returns the number of lttng_event_field entries in events; | |
1717 | * on error, returns a negative value. | |
f37d259d MD |
1718 | */ |
1719 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1720 | struct lttng_event_field **fields) | |
1721 | { | |
1722 | int ret; | |
1723 | struct lttcomm_session_msg lsm; | |
1724 | ||
1725 | if (handle == NULL) { | |
2f70b271 | 1726 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1727 | } |
1728 | ||
53efb85a | 1729 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1730 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1731 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1732 | |
cac3069d | 1733 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1734 | if (ret < 0) { |
1735 | return ret; | |
1736 | } | |
1737 | ||
1738 | return ret / sizeof(struct lttng_event_field); | |
1739 | } | |
1740 | ||
834978fd | 1741 | /* |
9ae110e2 JG |
1742 | * Lists all available kernel system calls. Allocates and sets the contents of |
1743 | * the events array. | |
834978fd | 1744 | * |
9ae110e2 JG |
1745 | * Returns the number of lttng_event entries in events; on error, returns a |
1746 | * negative value. | |
834978fd DG |
1747 | */ |
1748 | int lttng_list_syscalls(struct lttng_event **events) | |
1749 | { | |
1750 | int ret; | |
1751 | struct lttcomm_session_msg lsm; | |
1752 | ||
1753 | if (!events) { | |
1754 | return -LTTNG_ERR_INVALID; | |
1755 | } | |
1756 | ||
1757 | memset(&lsm, 0, sizeof(lsm)); | |
1758 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1759 | /* Force kernel domain for system calls. */ | |
1760 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1761 | ||
1762 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1763 | if (ret < 0) { | |
1764 | return ret; | |
1765 | } | |
1766 | ||
1767 | return ret / sizeof(struct lttng_event); | |
1768 | } | |
1769 | ||
1657e9bb | 1770 | /* |
9ae110e2 | 1771 | * Returns a human readable string describing |
8346beb6 | 1772 | * the error code (positive or negative value). |
1657e9bb | 1773 | */ |
9a745bc7 | 1774 | const char *lttng_strerror(int code) |
1657e9bb | 1775 | { |
8346beb6 PP |
1776 | if (code > 0) { |
1777 | code = -code; | |
1778 | } | |
1779 | ||
f73fabfd | 1780 | return error_get_str(code); |
1657e9bb DG |
1781 | } |
1782 | ||
b178f53e JG |
1783 | enum lttng_error_code lttng_create_session_ext( |
1784 | struct lttng_session_descriptor *session_descriptor) | |
1785 | { | |
1786 | enum lttng_error_code ret_code; | |
1787 | struct lttcomm_session_msg lsm = { | |
1788 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1789 | }; | |
1790 | void *reply = NULL; | |
1791 | struct lttng_buffer_view reply_view; | |
1792 | int reply_ret; | |
1793 | bool sessiond_must_generate_ouput; | |
1794 | struct lttng_dynamic_buffer payload; | |
1795 | int ret; | |
1796 | size_t descriptor_size; | |
1797 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1798 | ||
1799 | lttng_dynamic_buffer_init(&payload); | |
1800 | if (!session_descriptor) { | |
1801 | ret_code = LTTNG_ERR_INVALID; | |
1802 | goto end; | |
1803 | } | |
1804 | ||
1805 | sessiond_must_generate_ouput = | |
1806 | !lttng_session_descriptor_is_output_destination_initialized( | |
1807 | session_descriptor); | |
1808 | if (sessiond_must_generate_ouput) { | |
1809 | const char *home_dir = utils_get_home_dir(); | |
1810 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1811 | ||
1812 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1813 | ret_code = LTTNG_ERR_FATAL; | |
1814 | goto end; | |
1815 | } | |
1816 | ||
1817 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1818 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1819 | home_dir_len); | |
1820 | if (ret) { | |
1821 | ret_code = LTTNG_ERR_NOMEM; | |
1822 | goto end; | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | descriptor_size = payload.size; | |
1827 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1828 | &payload); | |
1829 | if (ret) { | |
1830 | ret_code = LTTNG_ERR_INVALID; | |
1831 | goto end; | |
1832 | } | |
1833 | descriptor_size = payload.size - descriptor_size; | |
1834 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1835 | ||
1836 | /* Command returns a session descriptor on success. */ | |
1837 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1838 | payload.size, &reply); | |
1839 | if (reply_ret < 0) { | |
4bd69c5f | 1840 | ret_code = (lttng_error_code) -reply_ret; |
b178f53e JG |
1841 | goto end; |
1842 | } else if (reply_ret == 0) { | |
1843 | /* Socket unexpectedly closed by the session daemon. */ | |
1844 | ret_code = LTTNG_ERR_FATAL; | |
1845 | goto end; | |
1846 | } | |
1847 | ||
4bd69c5f | 1848 | reply_view = lttng_buffer_view_init((const char *) reply, 0, reply_ret); |
b178f53e JG |
1849 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, |
1850 | &descriptor_reply); | |
1851 | if (ret < 0) { | |
1852 | ret_code = LTTNG_ERR_FATAL; | |
1853 | goto end; | |
1854 | } | |
1855 | ret_code = LTTNG_OK; | |
1856 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1857 | end: | |
1858 | free(reply); | |
1859 | lttng_dynamic_buffer_reset(&payload); | |
1860 | lttng_session_descriptor_destroy(descriptor_reply); | |
1861 | return ret_code; | |
1862 | } | |
1863 | ||
aaf97519 | 1864 | /* |
b178f53e | 1865 | * Create a new session using name and url for destination. |
a4b92340 | 1866 | * |
780d4bb8 | 1867 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1868 | */ |
a4b92340 | 1869 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1870 | { |
3dd05a85 | 1871 | int ret; |
a4b92340 | 1872 | ssize_t size; |
a4b92340 | 1873 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1874 | struct lttng_session_descriptor *descriptor = NULL; |
1875 | enum lttng_error_code ret_code; | |
00e2e675 | 1876 | |
b178f53e JG |
1877 | if (!name) { |
1878 | ret = -LTTNG_ERR_INVALID; | |
1879 | goto end; | |
00e2e675 DG |
1880 | } |
1881 | ||
bc894455 | 1882 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1883 | if (size < 0) { |
b178f53e JG |
1884 | ret = -LTTNG_ERR_INVALID; |
1885 | goto end; | |
1886 | } | |
1887 | switch (size) { | |
1888 | case 0: | |
1889 | descriptor = lttng_session_descriptor_create(name); | |
1890 | break; | |
1891 | case 1: | |
1892 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1893 | ret = -LTTNG_ERR_INVALID; | |
1894 | goto end; | |
1895 | } | |
1896 | descriptor = lttng_session_descriptor_local_create(name, | |
1897 | uris[0].dst.path); | |
1898 | break; | |
1899 | case 2: | |
1900 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1901 | NULL); | |
1902 | break; | |
1903 | default: | |
1904 | ret = -LTTNG_ERR_INVALID; | |
1905 | goto end; | |
1906 | } | |
1907 | if (!descriptor) { | |
1908 | ret = -LTTNG_ERR_INVALID; | |
1909 | goto end; | |
00e2e675 | 1910 | } |
b178f53e JG |
1911 | ret_code = lttng_create_session_ext(descriptor); |
1912 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1913 | end: | |
1914 | lttng_session_descriptor_destroy(descriptor); | |
1915 | free(uris); | |
1916 | return ret; | |
1917 | } | |
00e2e675 | 1918 | |
b178f53e JG |
1919 | /* |
1920 | * Create a session exclusively used for snapshot. | |
1921 | * | |
780d4bb8 | 1922 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1923 | */ |
1924 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1925 | { | |
1926 | int ret; | |
1927 | enum lttng_error_code ret_code; | |
1928 | ssize_t size; | |
1929 | struct lttng_uri *uris = NULL; | |
1930 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1931 | |
b178f53e JG |
1932 | if (!name) { |
1933 | ret = -LTTNG_ERR_INVALID; | |
1934 | goto end; | |
1935 | } | |
1936 | ||
1937 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1938 | if (size < 0) { | |
1939 | ret = -LTTNG_ERR_INVALID; | |
1940 | goto end; | |
1941 | } | |
1942 | /* | |
1943 | * If the user does not specify a custom subdir, use the session name. | |
1944 | */ | |
1945 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1946 | strlen(uris[0].subdir) == 0) { | |
1947 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1948 | name); | |
1949 | if (ret < 0) { | |
1950 | PERROR("Failed to set session name as network destination sub-directory"); | |
1951 | ret = -LTTNG_ERR_FATAL; | |
1952 | goto end; | |
1953 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1954 | /* Truncated output. */ | |
1955 | ret = -LTTNG_ERR_INVALID; | |
1956 | goto end; | |
1957 | } | |
1958 | } | |
3dd05a85 | 1959 | |
b178f53e JG |
1960 | switch (size) { |
1961 | case 0: | |
1962 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1963 | break; | |
1964 | case 1: | |
1965 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1966 | ret = -LTTNG_ERR_INVALID; | |
1967 | goto end; | |
1968 | } | |
1969 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1970 | name, | |
1971 | uris[0].dst.path); | |
1972 | break; | |
1973 | case 2: | |
1974 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1975 | name, | |
1976 | snapshot_url, | |
1977 | NULL); | |
1978 | break; | |
1979 | default: | |
1980 | ret = -LTTNG_ERR_INVALID; | |
1981 | goto end; | |
1982 | } | |
1983 | if (!descriptor) { | |
1984 | ret = -LTTNG_ERR_INVALID; | |
1985 | goto end; | |
1986 | } | |
1987 | ret_code = lttng_create_session_ext(descriptor); | |
1988 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1989 | end: | |
1990 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1991 | free(uris); |
1992 | return ret; | |
00e2e675 DG |
1993 | } |
1994 | ||
b178f53e JG |
1995 | /* |
1996 | * Create a session exclusively used for live. | |
1997 | * | |
780d4bb8 | 1998 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1999 | */ |
2000 | int lttng_create_session_live(const char *name, const char *url, | |
2001 | unsigned int timer_interval) | |
2002 | { | |
2003 | int ret; | |
2004 | enum lttng_error_code ret_code; | |
2005 | struct lttng_session_descriptor *descriptor = NULL; | |
2006 | ||
2007 | if (!name) { | |
2008 | ret = -LTTNG_ERR_INVALID; | |
2009 | goto end; | |
2010 | } | |
2011 | ||
2012 | if (url) { | |
2013 | descriptor = lttng_session_descriptor_live_network_create( | |
2014 | name, url, NULL, timer_interval); | |
2015 | } else { | |
2016 | descriptor = lttng_session_descriptor_live_create( | |
2017 | name, timer_interval); | |
2018 | } | |
2019 | if (!descriptor) { | |
2020 | ret = -LTTNG_ERR_INVALID; | |
2021 | goto end; | |
2022 | } | |
2023 | ret_code = lttng_create_session_ext(descriptor); | |
2024 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2025 | end: | |
2026 | lttng_session_descriptor_destroy(descriptor); | |
2027 | return ret; | |
2028 | } | |
2029 | ||
e20ee7c2 JD |
2030 | /* |
2031 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2032 | * |
2033 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2034 | */ |
2035 | int lttng_destroy_session(const char *session_name) | |
2036 | { | |
2037 | int ret; | |
3e3665b8 JG |
2038 | enum lttng_error_code ret_code; |
2039 | enum lttng_destruction_handle_status status; | |
2040 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2041 | |
2042 | /* | |
3e3665b8 JG |
2043 | * Stop the tracing and wait for the data to be |
2044 | * consumed. | |
e20ee7c2 JD |
2045 | */ |
2046 | ret = _lttng_stop_tracing(session_name, 1); | |
2047 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2048 | goto end; | |
2049 | } | |
2050 | ||
3e3665b8 JG |
2051 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2052 | if (ret_code != LTTNG_OK) { | |
2053 | ret = (int) -ret_code; | |
2054 | goto end; | |
2055 | } | |
a0377dfe | 2056 | LTTNG_ASSERT(handle); |
3e3665b8 JG |
2057 | |
2058 | /* Block until the completion of the destruction of the session. */ | |
2059 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2060 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2061 | ret = -LTTNG_ERR_UNK; | |
2062 | goto end; | |
2063 | } | |
2064 | ||
2065 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2066 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2067 | ret = -LTTNG_ERR_UNK; | |
2068 | goto end; | |
2069 | } | |
780d4bb8 | 2070 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2071 | end: |
3e3665b8 | 2072 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2073 | return ret; |
2074 | } | |
2075 | ||
2076 | /* | |
2077 | * Destroy the session without waiting for the data. | |
2078 | */ | |
2079 | int lttng_destroy_session_no_wait(const char *session_name) | |
2080 | { | |
3e3665b8 | 2081 | enum lttng_error_code ret_code; |
e20ee7c2 | 2082 | |
3e3665b8 | 2083 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
3204017e | 2084 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2085 | } |
2086 | ||
57167058 | 2087 | /* |
9ae110e2 JG |
2088 | * Ask the session daemon for all available sessions. |
2089 | * Sets the contents of the sessions array. | |
2090 | * Returns the number of lttng_session entries in sessions; | |
2091 | * on error, returns a negative value. | |
57167058 | 2092 | */ |
b178f53e | 2093 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2094 | { |
ca95a216 | 2095 | int ret; |
cd80958d | 2096 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2097 | const size_t session_size = sizeof(struct lttng_session) + |
2098 | sizeof(struct lttng_session_extended); | |
2099 | size_t session_count, i; | |
2100 | struct lttng_session_extended *sessions_extended_begin; | |
2101 | struct lttng_session *sessions = NULL; | |
57167058 | 2102 | |
53efb85a | 2103 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2104 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
985aea18 MD |
2105 | /* |
2106 | * Initialize out_sessions to NULL so it is initialized when | |
2107 | * lttng_list_sessions returns 0, thus allowing *out_sessions to | |
2108 | * be subsequently freed. | |
2109 | */ | |
2110 | *out_sessions = NULL; | |
b178f53e JG |
2111 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2112 | if (ret <= 0) { | |
b178f53e JG |
2113 | goto end; |
2114 | } | |
2115 | if (!sessions) { | |
2116 | ret = -LTTNG_ERR_FATAL; | |
2117 | goto end; | |
2118 | } | |
2119 | ||
2120 | if (ret % session_size) { | |
2121 | ret = -LTTNG_ERR_UNK; | |
2122 | free(sessions); | |
b178f53e | 2123 | goto end; |
57167058 | 2124 | } |
b178f53e JG |
2125 | session_count = (size_t) ret / session_size; |
2126 | sessions_extended_begin = (struct lttng_session_extended *) | |
2127 | (&sessions[session_count]); | |
57167058 | 2128 | |
b178f53e JG |
2129 | /* Set extended session info pointers. */ |
2130 | for (i = 0; i < session_count; i++) { | |
2131 | struct lttng_session *session = &sessions[i]; | |
2132 | struct lttng_session_extended *extended = | |
2133 | &(sessions_extended_begin[i]); | |
2134 | ||
2135 | session->extended.ptr = extended; | |
2136 | } | |
2137 | ||
2138 | ret = (int) session_count; | |
2139 | *out_sessions = sessions; | |
2140 | end: | |
2141 | return ret; | |
2142 | } | |
2143 | ||
2144 | enum lttng_error_code lttng_session_get_creation_time( | |
2145 | const struct lttng_session *session, uint64_t *creation_time) | |
2146 | { | |
2147 | enum lttng_error_code ret = LTTNG_OK; | |
2148 | struct lttng_session_extended *extended; | |
2149 | ||
2150 | if (!session || !creation_time || !session->extended.ptr) { | |
2151 | ret = LTTNG_ERR_INVALID; | |
2152 | goto end; | |
2153 | } | |
2154 | ||
4bd69c5f | 2155 | extended = (lttng_session_extended *) session->extended.ptr; |
b178f53e JG |
2156 | if (!extended->creation_time.is_set) { |
2157 | /* Not created on the session daemon yet. */ | |
2158 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2159 | goto end; | |
2160 | } | |
2161 | *creation_time = extended->creation_time.value; | |
2162 | end: | |
2163 | return ret; | |
57167058 DG |
2164 | } |
2165 | ||
d7ba1388 MD |
2166 | int lttng_set_session_shm_path(const char *session_name, |
2167 | const char *shm_path) | |
2168 | { | |
e1b624d0 | 2169 | int ret; |
d7ba1388 MD |
2170 | struct lttcomm_session_msg lsm; |
2171 | ||
2172 | if (session_name == NULL) { | |
2173 | return -LTTNG_ERR_INVALID; | |
2174 | } | |
2175 | ||
2176 | memset(&lsm, 0, sizeof(lsm)); | |
2177 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2178 | ||
e1b624d0 | 2179 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2180 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2181 | if (ret) { |
2182 | ret = -LTTNG_ERR_INVALID; | |
2183 | goto end; | |
2184 | } | |
2185 | ||
2186 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2187 | sizeof(lsm.u.set_shm_path.shm_path)); |
e1b624d0 JG |
2188 | if (ret) { |
2189 | ret = -LTTNG_ERR_INVALID; | |
2190 | goto end; | |
2191 | } | |
d7ba1388 | 2192 | |
e1b624d0 JG |
2193 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2194 | end: | |
2195 | return ret; | |
d7ba1388 MD |
2196 | } |
2197 | ||
9f19cc17 | 2198 | /* |
9ae110e2 JG |
2199 | * Ask the session daemon for all available domains of a session. |
2200 | * Sets the contents of the domains array. | |
2201 | * Returns the number of lttng_domain entries in domains; | |
2202 | * on error, returns a negative value. | |
9f19cc17 | 2203 | */ |
330be774 | 2204 | int lttng_list_domains(const char *session_name, |
cd80958d | 2205 | struct lttng_domain **domains) |
9f19cc17 DG |
2206 | { |
2207 | int ret; | |
cd80958d DG |
2208 | struct lttcomm_session_msg lsm; |
2209 | ||
330be774 | 2210 | if (session_name == NULL) { |
e1b624d0 JG |
2211 | ret = -LTTNG_ERR_INVALID; |
2212 | goto error; | |
cd80958d | 2213 | } |
9f19cc17 | 2214 | |
53efb85a | 2215 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2216 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2217 | ||
e1b624d0 | 2218 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2219 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2220 | if (ret) { |
2221 | ret = -LTTNG_ERR_INVALID; | |
2222 | goto error; | |
2223 | } | |
cd80958d | 2224 | |
cac3069d | 2225 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2226 | if (ret < 0) { |
e1b624d0 | 2227 | goto error; |
9f19cc17 DG |
2228 | } |
2229 | ||
2230 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2231 | error: |
2232 | return ret; | |
9f19cc17 DG |
2233 | } |
2234 | ||
2235 | /* | |
9ae110e2 JG |
2236 | * Ask the session daemon for all available channels of a session. |
2237 | * Sets the contents of the channels array. | |
2238 | * Returns the number of lttng_channel entries in channels; | |
2239 | * on error, returns a negative value. | |
9f19cc17 | 2240 | */ |
cd80958d DG |
2241 | int lttng_list_channels(struct lttng_handle *handle, |
2242 | struct lttng_channel **channels) | |
9f19cc17 DG |
2243 | { |
2244 | int ret; | |
53e367f9 JG |
2245 | size_t channel_count, i; |
2246 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2247 | sizeof(struct lttng_channel_extended); |
cd80958d | 2248 | struct lttcomm_session_msg lsm; |
4bd69c5f | 2249 | char *extended_at; |
cd80958d | 2250 | |
9d697d3d | 2251 | if (handle == NULL) { |
53e367f9 JG |
2252 | ret = -LTTNG_ERR_INVALID; |
2253 | goto end; | |
cd80958d DG |
2254 | } |
2255 | ||
53efb85a | 2256 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2257 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
e1b624d0 | 2258 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2259 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2260 | if (ret) { |
2261 | ret = -LTTNG_ERR_INVALID; | |
2262 | goto end; | |
2263 | } | |
9f19cc17 | 2264 | |
60160d2a | 2265 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2266 | |
cac3069d | 2267 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2268 | if (ret < 0) { |
53e367f9 JG |
2269 | goto end; |
2270 | } | |
2271 | ||
2272 | if (ret % channel_size) { | |
2273 | ret = -LTTNG_ERR_UNK; | |
2274 | free(*channels); | |
2275 | *channels = NULL; | |
2276 | goto end; | |
9f19cc17 | 2277 | } |
53e367f9 | 2278 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2279 | |
53e367f9 | 2280 | /* Set extended info pointers */ |
4bd69c5f | 2281 | extended_at = ((char *) *channels) + |
53e367f9 JG |
2282 | channel_count * sizeof(struct lttng_channel); |
2283 | for (i = 0; i < channel_count; i++) { | |
2284 | struct lttng_channel *chan = &(*channels)[i]; | |
2285 | ||
2286 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2287 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2288 | } |
2289 | ||
2290 | ret = (int) channel_count; | |
2291 | end: | |
2292 | return ret; | |
9f19cc17 DG |
2293 | } |
2294 | ||
2295 | /* | |
9ae110e2 JG |
2296 | * Ask the session daemon for all available events of a session channel. |
2297 | * Sets the contents of the events array. | |
2298 | * Returns the number of lttng_event entries in events; | |
2299 | * on error, returns a negative value. | |
9f19cc17 | 2300 | */ |
cd80958d DG |
2301 | int lttng_list_events(struct lttng_handle *handle, |
2302 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2303 | { |
2304 | int ret; | |
e368fb43 JG |
2305 | struct lttcomm_session_msg lsm = {}; |
2306 | const struct lttcomm_event_command_header *cmd_header = NULL; | |
b4e3ceb9 | 2307 | uint32_t nb_events, i; |
4bd69c5f | 2308 | const char *comm_ext_at; |
56f0bc67 | 2309 | struct lttng_dynamic_buffer listing; |
de453daa | 2310 | size_t storage_req; |
e368fb43 JG |
2311 | struct lttng_payload payload; |
2312 | struct lttng_payload payload_copy; | |
2313 | struct lttng_payload_view lsm_view = | |
2314 | lttng_payload_view_init_from_buffer( | |
2315 | (const char *) &lsm, 0, sizeof(lsm)); | |
2316 | struct lttng_buffer_view cmd_header_view; | |
2317 | struct lttng_buffer_view cmd_payload_view; | |
2318 | struct lttng_buffer_view flat_events_view; | |
2319 | struct lttng_buffer_view ext_view; | |
9f19cc17 | 2320 | |
9d697d3d DG |
2321 | /* Safety check. An handle and channel name are mandatory */ |
2322 | if (handle == NULL || channel_name == NULL) { | |
e368fb43 JG |
2323 | ret = -LTTNG_ERR_INVALID; |
2324 | goto end; | |
cd80958d DG |
2325 | } |
2326 | ||
e368fb43 JG |
2327 | lttng_payload_init(&payload); |
2328 | lttng_payload_init(&payload_copy); | |
2329 | ||
cd80958d | 2330 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
e1b624d0 | 2331 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2332 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2333 | if (ret) { |
2334 | ret = -LTTNG_ERR_INVALID; | |
2335 | goto end; | |
2336 | } | |
2337 | ||
2338 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2339 | sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2340 | if (ret) { |
2341 | ret = -LTTNG_ERR_INVALID; | |
2342 | goto end; | |
2343 | } | |
2344 | ||
60160d2a | 2345 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2346 | |
e368fb43 | 2347 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &payload); |
9f19cc17 | 2348 | if (ret < 0) { |
de453daa | 2349 | goto end; |
9f19cc17 DG |
2350 | } |
2351 | ||
e368fb43 JG |
2352 | /* |
2353 | * A copy of the payload is performed since it will be | |
2354 | * consumed twice. Consuming the same payload twice is invalid since | |
2355 | * it will cause any received file descriptor to become "shared" | |
2356 | * between different instances of the resulting objects. | |
2357 | */ | |
2358 | ret = lttng_payload_copy(&payload, &payload_copy); | |
2359 | if (ret) { | |
2360 | ret = -LTTNG_ERR_NOMEM; | |
2361 | goto end; | |
2362 | } | |
2363 | ||
2364 | cmd_header_view = lttng_buffer_view_from_dynamic_buffer( | |
2365 | &payload.buffer, 0, sizeof(*cmd_header)); | |
3e6e0df2 | 2366 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { |
e368fb43 | 2367 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
d9f484bc JG |
2368 | goto end; |
2369 | } | |
2370 | ||
e368fb43 JG |
2371 | cmd_header = (typeof(cmd_header)) cmd_header_view.data; |
2372 | ||
b4e3ceb9 PP |
2373 | /* Set number of events and free command header */ |
2374 | nb_events = cmd_header->nb_events; | |
2375 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2376 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2377 | goto end; |
b4e3ceb9 | 2378 | } |
e368fb43 JG |
2379 | |
2380 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( | |
2381 | &payload.buffer, sizeof(*cmd_header), -1); | |
b4e3ceb9 | 2382 | |
de453daa JG |
2383 | /* |
2384 | * The buffer that is returned must contain a "flat" version of | |
2385 | * the events that are returned. In other words, all pointers | |
2386 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2387 | * buffer so that the user may free everything by simply calling free() |
2388 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2389 | * compatibility. |
2390 | * | |
56f0bc67 JG |
2391 | * A first pass is performed to compute the size of the buffer that |
2392 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2393 | * the returned events so that their members always point within the |
2394 | * buffer. | |
2395 | * | |
2396 | * The layout of the returned buffer is as follows: | |
2397 | * - struct lttng_event[nb_events], | |
2398 | * - nb_events times the following: | |
2399 | * - struct lttng_event_extended, | |
2400 | * - flattened version of userspace_probe_location | |
2401 | * - filter_expression | |
2402 | * - exclusions | |
2403 | * - padding to align to 64-bits | |
2404 | */ | |
e368fb43 JG |
2405 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2406 | nb_events * sizeof(struct lttng_event), -1); | |
2407 | comm_ext_at = ext_view.data; | |
de453daa | 2408 | storage_req = nb_events * sizeof(struct lttng_event); |
e368fb43 JG |
2409 | { |
2410 | struct lttng_payload_view payload_view = | |
2411 | lttng_payload_view_from_payload(&payload, 0, -1); | |
b4e3ceb9 | 2412 | |
e368fb43 JG |
2413 | for (i = 0; i < nb_events; i++) { |
2414 | const struct lttcomm_event_extended_header *ext_comm = | |
2415 | (struct lttcomm_event_extended_header *) | |
2416 | comm_ext_at; | |
2417 | int probe_storage_req = 0; | |
b4e3ceb9 | 2418 | |
e368fb43 JG |
2419 | comm_ext_at += sizeof(*ext_comm); |
2420 | comm_ext_at += ext_comm->filter_len; | |
2421 | comm_ext_at += ext_comm->nb_exclusions * | |
2422 | LTTNG_SYMBOL_NAME_LEN; | |
2423 | ||
2424 | if (ext_comm->userspace_probe_location_len) { | |
2425 | struct lttng_userspace_probe_location | |
2426 | *probe_location = NULL; | |
2427 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2428 | &payload_view, | |
2429 | (const char *) comm_ext_at - | |
2430 | payload_view.buffer.data, | |
2431 | ext_comm->userspace_probe_location_len); | |
56f0bc67 | 2432 | |
3e6e0df2 JG |
2433 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2434 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2435 | goto end; | |
2436 | } | |
2437 | ||
e368fb43 JG |
2438 | /* |
2439 | * Create a temporary userspace probe location | |
2440 | * to determine the size needed by a "flattened" | |
2441 | * version of that same probe location. | |
2442 | */ | |
2443 | ret = lttng_userspace_probe_location_create_from_payload( | |
2444 | &probe_location_view, | |
2445 | &probe_location); | |
2446 | if (ret < 0) { | |
2447 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2448 | goto end; | |
2449 | } | |
56f0bc67 | 2450 | |
e368fb43 JG |
2451 | ret = lttng_userspace_probe_location_flatten( |
2452 | probe_location, NULL); | |
2453 | lttng_userspace_probe_location_destroy( | |
2454 | probe_location); | |
2455 | if (ret < 0) { | |
2456 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2457 | goto end; | |
2458 | } | |
56f0bc67 | 2459 | |
e368fb43 JG |
2460 | probe_storage_req = ret; |
2461 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2462 | } |
2463 | ||
e368fb43 JG |
2464 | storage_req += sizeof(struct lttng_event_extended); |
2465 | storage_req += ext_comm->filter_len; | |
2466 | storage_req += ext_comm->nb_exclusions * | |
2467 | LTTNG_SYMBOL_NAME_LEN; | |
2468 | /* Padding to ensure the flat probe is aligned. */ | |
1cbd136b | 2469 | storage_req = lttng_align_ceil(storage_req, sizeof(uint64_t)); |
e368fb43 | 2470 | storage_req += probe_storage_req; |
56f0bc67 | 2471 | } |
b4e3ceb9 PP |
2472 | } |
2473 | ||
56f0bc67 JG |
2474 | lttng_dynamic_buffer_init(&listing); |
2475 | /* | |
2476 | * We must ensure that "listing" is never resized so as to preserve | |
2477 | * the validity of the flattened objects. | |
2478 | */ | |
2479 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2480 | if (ret) { | |
2481 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2482 | goto end; |
2483 | } | |
56f0bc67 | 2484 | |
e368fb43 JG |
2485 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( |
2486 | &payload_copy.buffer, sizeof(*cmd_header), -1); | |
2487 | flat_events_view = lttng_buffer_view_from_view(&cmd_payload_view, 0, | |
56f0bc67 | 2488 | nb_events * sizeof(struct lttng_event)); |
e368fb43 | 2489 | ret = lttng_dynamic_buffer_append_view(&listing, &flat_events_view); |
56f0bc67 JG |
2490 | if (ret) { |
2491 | ret = -LTTNG_ERR_NOMEM; | |
2492 | goto free_dynamic_buffer; | |
2493 | } | |
de453daa | 2494 | |
e368fb43 JG |
2495 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2496 | nb_events * sizeof(struct lttng_event), -1); | |
2497 | comm_ext_at = ext_view.data; | |
2498 | ||
2499 | { | |
2500 | struct lttng_payload_view payload_copy_view = | |
2501 | lttng_payload_view_from_payload( | |
2502 | &payload_copy, 0, -1); | |
2503 | ||
2504 | for (i = 0; i < nb_events; i++) { | |
2505 | struct lttng_event *event = (typeof(event))( | |
2506 | listing.data + | |
2507 | (sizeof(struct lttng_event) * i)); | |
2508 | const struct lttcomm_event_extended_header *ext_comm = | |
2509 | (typeof(ext_comm)) comm_ext_at; | |
2510 | struct lttng_event_extended *event_extended = | |
2511 | (typeof(event_extended))(listing.data + | |
2512 | listing.size); | |
2513 | ||
2514 | /* Insert struct lttng_event_extended. */ | |
2515 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2516 | listing.size + sizeof(*event_extended)); | |
56f0bc67 JG |
2517 | if (ret) { |
2518 | ret = -LTTNG_ERR_NOMEM; | |
2519 | goto free_dynamic_buffer; | |
2520 | } | |
e368fb43 JG |
2521 | event->extended.ptr = event_extended; |
2522 | ||
2523 | comm_ext_at += sizeof(*ext_comm); | |
2524 | ||
2525 | /* Insert filter expression. */ | |
2526 | if (ext_comm->filter_len) { | |
2527 | event_extended->filter_expression = | |
2528 | listing.data + listing.size; | |
2529 | ret = lttng_dynamic_buffer_append(&listing, | |
2530 | comm_ext_at, | |
2531 | ext_comm->filter_len); | |
2532 | if (ret) { | |
2533 | ret = -LTTNG_ERR_NOMEM; | |
2534 | goto free_dynamic_buffer; | |
2535 | } | |
2536 | comm_ext_at += ext_comm->filter_len; | |
2537 | } | |
56f0bc67 | 2538 | |
e368fb43 JG |
2539 | /* Insert exclusions. */ |
2540 | if (ext_comm->nb_exclusions) { | |
2541 | event_extended->exclusions.count = | |
2542 | ext_comm->nb_exclusions; | |
2543 | event_extended->exclusions.strings = | |
2544 | listing.data + listing.size; | |
2545 | ||
2546 | ret = lttng_dynamic_buffer_append(&listing, | |
2547 | comm_ext_at, | |
2548 | ext_comm->nb_exclusions * | |
2549 | LTTNG_SYMBOL_NAME_LEN); | |
2550 | if (ret) { | |
2551 | ret = -LTTNG_ERR_NOMEM; | |
2552 | goto free_dynamic_buffer; | |
2553 | } | |
2554 | comm_ext_at += ext_comm->nb_exclusions * | |
2555 | LTTNG_SYMBOL_NAME_LEN; | |
2556 | } | |
56f0bc67 | 2557 | |
e368fb43 JG |
2558 | /* Insert padding to align to 64-bits. */ |
2559 | ret = lttng_dynamic_buffer_set_size(&listing, | |
1cbd136b | 2560 | lttng_align_ceil(listing.size, |
e368fb43 | 2561 | sizeof(uint64_t))); |
56f0bc67 JG |
2562 | if (ret) { |
2563 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2564 | goto free_dynamic_buffer; |
56f0bc67 | 2565 | } |
56f0bc67 | 2566 | |
e368fb43 JG |
2567 | /* Insert flattened userspace probe location. */ |
2568 | if (ext_comm->userspace_probe_location_len) { | |
2569 | struct lttng_userspace_probe_location | |
2570 | *probe_location = NULL; | |
2571 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2572 | &payload_copy_view, | |
2573 | (const char *) comm_ext_at - | |
2574 | payload_copy_view.buffer.data, | |
2575 | ext_comm->userspace_probe_location_len); | |
2576 | ||
3e6e0df2 JG |
2577 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2578 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2579 | goto free_dynamic_buffer; | |
2580 | } | |
2581 | ||
e368fb43 JG |
2582 | ret = lttng_userspace_probe_location_create_from_payload( |
2583 | &probe_location_view, | |
2584 | &probe_location); | |
2585 | if (ret < 0) { | |
2586 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2587 | goto free_dynamic_buffer; | |
2588 | } | |
de453daa | 2589 | |
e368fb43 JG |
2590 | event_extended->probe_location = (struct lttng_userspace_probe_location |
2591 | *) (listing.data + | |
2592 | listing.size); | |
2593 | ret = lttng_userspace_probe_location_flatten( | |
2594 | probe_location, &listing); | |
2595 | lttng_userspace_probe_location_destroy( | |
2596 | probe_location); | |
2597 | if (ret < 0) { | |
2598 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2599 | goto free_dynamic_buffer; | |
2600 | } | |
56f0bc67 | 2601 | |
e368fb43 | 2602 | comm_ext_at += ext_comm->userspace_probe_location_len; |
56f0bc67 | 2603 | } |
56f0bc67 | 2604 | } |
de453daa JG |
2605 | } |
2606 | ||
56f0bc67 JG |
2607 | /* Don't reset listing buffer as we return its content. */ |
2608 | *events = (struct lttng_event *) listing.data; | |
2609 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2610 | ret = (int) nb_events; |
56f0bc67 JG |
2611 | free_dynamic_buffer: |
2612 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2613 | end: |
e368fb43 JG |
2614 | lttng_payload_reset(&payload); |
2615 | lttng_payload_reset(&payload_copy); | |
b4e3ceb9 | 2616 | return ret; |
9f19cc17 DG |
2617 | } |
2618 | ||
fac6795d | 2619 | /* |
1c8d13c8 TD |
2620 | * Sets the tracing_group variable with name. |
2621 | * This function allocates memory pointed to by tracing_group. | |
2622 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2623 | */ |
2624 | int lttng_set_tracing_group(const char *name) | |
2625 | { | |
e32a3d0f | 2626 | int ret = 0; |
76da29b6 | 2627 | char *new_group; |
e32a3d0f | 2628 | |
9d697d3d | 2629 | if (name == NULL) { |
e32a3d0f JG |
2630 | ret = -LTTNG_ERR_INVALID; |
2631 | goto end; | |
9d697d3d DG |
2632 | } |
2633 | ||
e32a3d0f JG |
2634 | new_group = strdup(name); |
2635 | if (!new_group) { | |
2636 | ret = -LTTNG_ERR_FATAL; | |
2637 | goto end; | |
fac6795d DG |
2638 | } |
2639 | ||
76da29b6 JR |
2640 | free(tracing_group); |
2641 | tracing_group = new_group; | |
2642 | new_group = NULL; | |
2643 | ||
e32a3d0f JG |
2644 | end: |
2645 | return ret; | |
fac6795d DG |
2646 | } |
2647 | ||
cd80958d | 2648 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2649 | struct lttng_calibrate *calibrate) |
2650 | { | |
b812e5ca PP |
2651 | /* |
2652 | * This command was removed in LTTng 2.9. | |
2653 | */ | |
2654 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2655 | } |
2656 | ||
5edd7e09 DG |
2657 | /* |
2658 | * Set default channel attributes. | |
441c16a7 | 2659 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2660 | */ |
2661 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2662 | struct lttng_channel_attr *attr) | |
2663 | { | |
294851b0 | 2664 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2665 | |
5edd7e09 DG |
2666 | /* Safety check */ |
2667 | if (attr == NULL || domain == NULL) { | |
2668 | return; | |
2669 | } | |
2670 | ||
294851b0 | 2671 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2672 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2673 | ||
0a9c6494 DG |
2674 | /* Same for all domains. */ |
2675 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2676 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2677 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2678 | ||
5edd7e09 DG |
2679 | switch (domain->type) { |
2680 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2681 | attr->switch_timer_interval = |
2682 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2683 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2684 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2685 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2686 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2687 | if (extended) { |
2688 | extended->monitor_timer_interval = | |
2689 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2690 | extended->blocking_timeout = |
2691 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2692 | } |
5edd7e09 DG |
2693 | break; |
2694 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2695 | switch (domain->buf_type) { |
2696 | case LTTNG_BUFFER_PER_UID: | |
2697 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2698 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2699 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2700 | attr->switch_timer_interval = |
2701 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2702 | attr->read_timer_interval = | |
2703 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2704 | if (extended) { |
2705 | extended->monitor_timer_interval = | |
2706 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2707 | extended->blocking_timeout = |
2708 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2709 | } |
0a9c6494 DG |
2710 | break; |
2711 | case LTTNG_BUFFER_PER_PID: | |
2712 | default: | |
2713 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2714 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2715 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2716 | attr->switch_timer_interval = |
2717 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2718 | attr->read_timer_interval = | |
2719 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2720 | if (extended) { |
2721 | extended->monitor_timer_interval = | |
2722 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2723 | extended->blocking_timeout = |
2724 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2725 | } |
0a9c6494 DG |
2726 | break; |
2727 | } | |
5edd7e09 | 2728 | default: |
441c16a7 | 2729 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2730 | break; |
2731 | } | |
cf0bcb51 JG |
2732 | |
2733 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2734 | } |
2735 | ||
5ba3702f JG |
2736 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2737 | uint64_t *discarded_events) | |
2738 | { | |
2739 | int ret = 0; | |
cf0bcb51 | 2740 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2741 | |
2742 | if (!channel || !discarded_events) { | |
2743 | ret = -LTTNG_ERR_INVALID; | |
2744 | goto end; | |
2745 | } | |
2746 | ||
4bd69c5f | 2747 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2748 | if (!chan_ext) { |
2749 | /* | |
2750 | * This can happen since the lttng_channel structure is | |
2751 | * used for other tasks where this pointer is never set. | |
2752 | */ | |
2753 | *discarded_events = 0; | |
2754 | goto end; | |
2755 | } | |
2756 | ||
2757 | *discarded_events = chan_ext->discarded_events; | |
2758 | end: | |
2759 | return ret; | |
2760 | } | |
2761 | ||
2762 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2763 | uint64_t *lost_packets) | |
2764 | { | |
2765 | int ret = 0; | |
cf0bcb51 | 2766 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2767 | |
2768 | if (!channel || !lost_packets) { | |
2769 | ret = -LTTNG_ERR_INVALID; | |
2770 | goto end; | |
2771 | } | |
2772 | ||
4bd69c5f | 2773 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2774 | if (!chan_ext) { |
2775 | /* | |
2776 | * This can happen since the lttng_channel structure is | |
2777 | * used for other tasks where this pointer is never set. | |
2778 | */ | |
2779 | *lost_packets = 0; | |
2780 | goto end; | |
2781 | } | |
2782 | ||
2783 | *lost_packets = chan_ext->lost_packets; | |
2784 | end: | |
2785 | return ret; | |
2786 | } | |
2787 | ||
cf0bcb51 JG |
2788 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2789 | uint64_t *monitor_timer_interval) | |
2790 | { | |
2791 | int ret = 0; | |
2792 | ||
2793 | if (!chan || !monitor_timer_interval) { | |
2794 | ret = -LTTNG_ERR_INVALID; | |
2795 | goto end; | |
2796 | } | |
2797 | ||
2798 | if (!chan->attr.extended.ptr) { | |
2799 | ret = -LTTNG_ERR_INVALID; | |
2800 | goto end; | |
2801 | } | |
2802 | ||
2803 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2804 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2805 | end: | |
2806 | return ret; | |
2807 | } | |
2808 | ||
2809 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2810 | uint64_t monitor_timer_interval) | |
2811 | { | |
2812 | int ret = 0; | |
2813 | ||
2814 | if (!chan || !chan->attr.extended.ptr) { | |
2815 | ret = -LTTNG_ERR_INVALID; | |
2816 | goto end; | |
2817 | } | |
2818 | ||
2819 | ((struct lttng_channel_extended *) | |
2820 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2821 | monitor_timer_interval; | |
2822 | end: | |
2823 | return ret; | |
2824 | } | |
2825 | ||
491d1539 MD |
2826 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2827 | int64_t *blocking_timeout) | |
2828 | { | |
2829 | int ret = 0; | |
2830 | ||
2831 | if (!chan || !blocking_timeout) { | |
2832 | ret = -LTTNG_ERR_INVALID; | |
2833 | goto end; | |
2834 | } | |
2835 | ||
2836 | if (!chan->attr.extended.ptr) { | |
2837 | ret = -LTTNG_ERR_INVALID; | |
2838 | goto end; | |
2839 | } | |
2840 | ||
2841 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2842 | chan->attr.extended.ptr)->blocking_timeout; | |
2843 | end: | |
2844 | return ret; | |
2845 | } | |
2846 | ||
2847 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2848 | int64_t blocking_timeout) | |
2849 | { | |
2850 | int ret = 0; | |
2851 | int64_t msec_timeout; | |
2852 | ||
2853 | if (!chan || !chan->attr.extended.ptr) { | |
2854 | ret = -LTTNG_ERR_INVALID; | |
2855 | goto end; | |
2856 | } | |
2857 | ||
2858 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2859 | ret = -LTTNG_ERR_INVALID; | |
2860 | goto end; | |
2861 | } | |
2862 | ||
2863 | /* | |
2864 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2865 | * us to accept a narrower range of values (msecs expressed as a signed | |
2866 | * 32-bit integer). | |
2867 | */ | |
2868 | msec_timeout = blocking_timeout / 1000; | |
2869 | if (msec_timeout != (int32_t) msec_timeout) { | |
2870 | ret = -LTTNG_ERR_INVALID; | |
2871 | goto end; | |
2872 | } | |
2873 | ||
2874 | ((struct lttng_channel_extended *) | |
2875 | chan->attr.extended.ptr)->blocking_timeout = | |
2876 | blocking_timeout; | |
2877 | end: | |
2878 | return ret; | |
2879 | } | |
2880 | ||
fac6795d | 2881 | /* |
2269e89e | 2882 | * Check if session daemon is alive. |
fac6795d | 2883 | * |
2269e89e | 2884 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2885 | * On error returns a negative value. |
fac6795d | 2886 | */ |
947308c4 | 2887 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2888 | { |
2889 | int ret; | |
2890 | ||
2891 | ret = set_session_daemon_path(); | |
2892 | if (ret < 0) { | |
9ae110e2 | 2893 | /* Error. */ |
fac6795d DG |
2894 | return ret; |
2895 | } | |
2896 | ||
9d035200 | 2897 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2898 | /* |
9ae110e2 JG |
2899 | * No socket path set. Weird error which means the constructor |
2900 | * was not called. | |
2f70b271 | 2901 | */ |
a0377dfe | 2902 | abort(); |
fac6795d DG |
2903 | } |
2904 | ||
2269e89e | 2905 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2906 | if (ret < 0) { |
9ae110e2 | 2907 | /* Not alive. */ |
7d8234d9 MD |
2908 | return 0; |
2909 | } | |
7d8234d9 | 2910 | |
9ae110e2 | 2911 | /* Is alive. */ |
947308c4 | 2912 | return 1; |
fac6795d DG |
2913 | } |
2914 | ||
00e2e675 | 2915 | /* |
a4b92340 | 2916 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2917 | * |
2918 | * Return 0 on success, else a negative value. | |
2919 | */ | |
a4b92340 DG |
2920 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2921 | const char *control_url, const char *data_url) | |
00e2e675 | 2922 | { |
3dd05a85 | 2923 | int ret; |
a4b92340 | 2924 | ssize_t size; |
00e2e675 | 2925 | struct lttcomm_session_msg lsm; |
a4b92340 | 2926 | struct lttng_uri *uris = NULL; |
00e2e675 | 2927 | |
a4b92340 | 2928 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
e1b624d0 JG |
2929 | ret = -LTTNG_ERR_INVALID; |
2930 | goto error; | |
00e2e675 DG |
2931 | } |
2932 | ||
a4b92340 DG |
2933 | memset(&lsm, 0, sizeof(lsm)); |
2934 | ||
00e2e675 DG |
2935 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2936 | ||
e1b624d0 | 2937 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 2938 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2939 | if (ret) { |
2940 | ret = -LTTNG_ERR_INVALID; | |
2941 | goto error; | |
2942 | } | |
2943 | ||
60160d2a | 2944 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2945 | |
bc894455 | 2946 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2947 | if (size < 0) { |
e1b624d0 JG |
2948 | ret = -LTTNG_ERR_INVALID; |
2949 | goto error; | |
a4b92340 DG |
2950 | } |
2951 | ||
2952 | lsm.u.uri.size = size; | |
00e2e675 | 2953 | |
795a978d | 2954 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2955 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2956 | |
2957 | free(uris); | |
e1b624d0 | 2958 | error: |
3dd05a85 | 2959 | return ret; |
00e2e675 DG |
2960 | } |
2961 | ||
2962 | /* | |
9c6bda17 | 2963 | * [OBSOLETE] |
00e2e675 | 2964 | */ |
4bd69c5f SM |
2965 | extern "C" |
2966 | LTTNG_EXPORT int lttng_enable_consumer(struct lttng_handle *handle); | |
00e2e675 DG |
2967 | int lttng_enable_consumer(struct lttng_handle *handle) |
2968 | { | |
785d2d0d | 2969 | return -ENOSYS; |
00e2e675 DG |
2970 | } |
2971 | ||
2972 | /* | |
9c6bda17 | 2973 | * [OBSOLETE] |
00e2e675 | 2974 | */ |
4bd69c5f SM |
2975 | extern "C" |
2976 | LTTNG_EXPORT int lttng_disable_consumer(struct lttng_handle *handle); | |
00e2e675 DG |
2977 | int lttng_disable_consumer(struct lttng_handle *handle) |
2978 | { | |
785d2d0d | 2979 | return -ENOSYS; |
00e2e675 DG |
2980 | } |
2981 | ||
07424f16 | 2982 | /* |
b178f53e | 2983 | * [OBSOLETE] |
07424f16 | 2984 | */ |
4bd69c5f SM |
2985 | extern "C" |
2986 | LTTNG_EXPORT int _lttng_create_session_ext(const char *name, const char *url, | |
2ec40111 | 2987 | const char *datetime); |
07424f16 DG |
2988 | int _lttng_create_session_ext(const char *name, const char *url, |
2989 | const char *datetime) | |
2990 | { | |
b178f53e | 2991 | return -ENOSYS; |
07424f16 DG |
2992 | } |
2993 | ||
806e2684 DG |
2994 | /* |
2995 | * For a given session name, this call checks if the data is ready to be read | |
2996 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2997 | * any readers. | |
2998 | */ | |
6d805429 | 2999 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
3000 | { |
3001 | int ret; | |
3002 | struct lttcomm_session_msg lsm; | |
f6151c55 | 3003 | uint8_t *pending = NULL; |
806e2684 DG |
3004 | |
3005 | if (session_name == NULL) { | |
3006 | return -LTTNG_ERR_INVALID; | |
3007 | } | |
3008 | ||
53efb85a | 3009 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 3010 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 3011 | |
e1b624d0 | 3012 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 3013 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3014 | if (ret) { |
3015 | ret = -LTTNG_ERR_INVALID; | |
3016 | goto end; | |
3017 | } | |
806e2684 | 3018 | |
f6151c55 JG |
3019 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
3020 | if (ret < 0) { | |
3021 | goto end; | |
3022 | } else if (ret != 1) { | |
3023 | /* Unexpected payload size */ | |
3024 | ret = -LTTNG_ERR_INVALID; | |
3025 | goto end; | |
e848d36d JG |
3026 | } else if (!pending) { |
3027 | /* Internal error. */ | |
3028 | ret = -LTTNG_ERR_UNK; | |
3029 | goto end; | |
806e2684 DG |
3030 | } |
3031 | ||
f6151c55 JG |
3032 | ret = (int) *pending; |
3033 | end: | |
3034 | free(pending); | |
806e2684 DG |
3035 | return ret; |
3036 | } | |
3037 | ||
93ec662e JD |
3038 | /* |
3039 | * Regenerate the metadata for a session. | |
3040 | * Return 0 on success, a negative error code on error. | |
3041 | */ | |
eded6438 | 3042 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
3043 | { |
3044 | int ret; | |
3045 | struct lttcomm_session_msg lsm; | |
3046 | ||
3047 | if (!session_name) { | |
3048 | ret = -LTTNG_ERR_INVALID; | |
3049 | goto end; | |
3050 | } | |
3051 | ||
3052 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 3053 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 3054 | |
e1b624d0 | 3055 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 3056 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3057 | if (ret) { |
3058 | ret = -LTTNG_ERR_INVALID; | |
3059 | goto end; | |
3060 | } | |
93ec662e JD |
3061 | |
3062 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3063 | if (ret < 0) { | |
3064 | goto end; | |
3065 | } | |
3066 | ||
3067 | ret = 0; | |
3068 | end: | |
3069 | return ret; | |
3070 | } | |
3071 | ||
eded6438 JD |
3072 | /* |
3073 | * Deprecated, replaced by lttng_regenerate_metadata. | |
3074 | */ | |
3075 | int lttng_metadata_regenerate(const char *session_name) | |
3076 | { | |
3077 | return lttng_regenerate_metadata(session_name); | |
3078 | } | |
3079 | ||
c2561365 JD |
3080 | /* |
3081 | * Regenerate the statedump of a session. | |
3082 | * Return 0 on success, a negative error code on error. | |
3083 | */ | |
3084 | int lttng_regenerate_statedump(const char *session_name) | |
3085 | { | |
3086 | int ret; | |
3087 | struct lttcomm_session_msg lsm; | |
3088 | ||
3089 | if (!session_name) { | |
3090 | ret = -LTTNG_ERR_INVALID; | |
3091 | goto end; | |
3092 | } | |
3093 | ||
3094 | memset(&lsm, 0, sizeof(lsm)); | |
3095 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
3096 | ||
e1b624d0 | 3097 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 3098 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3099 | if (ret) { |
3100 | ret = -LTTNG_ERR_INVALID; | |
3101 | goto end; | |
3102 | } | |
c2561365 JD |
3103 | |
3104 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3105 | if (ret < 0) { | |
3106 | goto end; | |
3107 | } | |
3108 | ||
3109 | ret = 0; | |
3110 | end: | |
3111 | return ret; | |
3112 | } | |
3113 | ||
a5c2d2a7 JG |
3114 | static |
3115 | int _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, | |
3116 | bool generate_name) | |
a58c490f JG |
3117 | { |
3118 | int ret; | |
99608320 JR |
3119 | struct lttcomm_session_msg lsm = { |
3120 | .cmd_type = LTTNG_REGISTER_TRIGGER, | |
3121 | }; | |
4bd69c5f | 3122 | lsm.u.trigger.is_trigger_anonymous = !name && !generate_name; |
99608320 JR |
3123 | struct lttcomm_session_msg *message_lsm; |
3124 | struct lttng_payload message; | |
3125 | struct lttng_payload reply; | |
242388e4 | 3126 | struct lttng_trigger *reply_trigger = NULL; |
9124c630 | 3127 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
3128 | const struct lttng_credentials user_creds = { |
3129 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3130 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3131 | }; | |
a5c2d2a7 JG |
3132 | const char *unused_trigger_name = NULL; |
3133 | enum lttng_trigger_status trigger_status; | |
99608320 JR |
3134 | |
3135 | lttng_payload_init(&message); | |
3136 | lttng_payload_init(&reply); | |
a58c490f JG |
3137 | |
3138 | if (!trigger) { | |
3139 | ret = -LTTNG_ERR_INVALID; | |
3140 | goto end; | |
3141 | } | |
3142 | ||
a5c2d2a7 JG |
3143 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
3144 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
3145 | /* Re-using already registered trigger. */ | |
3146 | ret = -LTTNG_ERR_INVALID; | |
3147 | goto end; | |
3148 | } | |
3149 | ||
3150 | if (name) { | |
3151 | trigger_status = lttng_trigger_set_name(trigger, name); | |
3152 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3153 | ret = -LTTNG_ERR_NOMEM; | |
3154 | goto end; | |
3155 | } | |
3156 | } | |
3157 | ||
64eafdf6 JR |
3158 | if (!trigger->creds.uid.is_set) { |
3159 | /* Use the client's credentials as the trigger credentials. */ | |
3160 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3161 | } else { | |
3162 | /* | |
3163 | * Validate that either the current trigger credentials and the | |
3164 | * client credentials are identical or that the current user is | |
3165 | * root. The root user can register, unregister triggers for | |
3166 | * himself and other users. | |
3167 | * | |
3168 | * This check is also present on the sessiond side, using the | |
3169 | * credentials passed on the socket. These check are all | |
3170 | * "safety" checks. | |
3171 | */ | |
3172 | const struct lttng_credentials *trigger_creds = | |
3173 | lttng_trigger_get_credentials(trigger); | |
3174 | ||
3175 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3176 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3177 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 3178 | goto end_unset_name; |
64eafdf6 JR |
3179 | } |
3180 | } | |
3181 | } | |
3182 | ||
a58c490f | 3183 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3184 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 3185 | goto end_unset_name; |
a58c490f JG |
3186 | } |
3187 | ||
9124c630 JR |
3188 | domain_type = lttng_trigger_get_underlying_domain_type_restriction( |
3189 | trigger); | |
3190 | ||
3191 | lsm.domain.type = domain_type; | |
3192 | ||
97285430 JG |
3193 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3194 | if (ret) { | |
3195 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 3196 | goto end_unset_name; |
97285430 | 3197 | } |
99608320 | 3198 | |
99608320 | 3199 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3200 | if (ret < 0) { |
a58c490f | 3201 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3202 | goto end_unset_name; |
a58c490f JG |
3203 | } |
3204 | ||
b22f4f54 JG |
3205 | /* |
3206 | * This is needed to populate the trigger object size for the command | |
3207 | * header. | |
3208 | */ | |
3209 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3210 | ||
99608320 JR |
3211 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3212 | ||
3213 | { | |
3214 | struct lttng_payload_view message_view = | |
3215 | lttng_payload_view_from_payload( | |
3216 | &message, 0, -1); | |
3217 | ||
3218 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3219 | &message_view); | |
3220 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3221 | if (ret < 0) { | |
a5c2d2a7 | 3222 | goto end_unset_name; |
99608320 JR |
3223 | } |
3224 | } | |
3225 | ||
242388e4 JR |
3226 | { |
3227 | struct lttng_payload_view reply_view = | |
3228 | lttng_payload_view_from_payload( | |
3229 | &reply, 0, reply.buffer.size); | |
3230 | ||
3231 | ret = lttng_trigger_create_from_payload( | |
3232 | &reply_view, &reply_trigger); | |
3233 | if (ret < 0) { | |
a5c2d2a7 JG |
3234 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3235 | goto end_unset_name; | |
242388e4 JR |
3236 | } |
3237 | } | |
3238 | ||
a5c2d2a7 JG |
3239 | if (name || generate_name) { |
3240 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3241 | if (ret < 0) { | |
3242 | ret = -LTTNG_ERR_NOMEM; | |
3243 | goto end; | |
3244 | } | |
242388e4 JR |
3245 | } |
3246 | ||
99608320 | 3247 | ret = 0; |
a5c2d2a7 JG |
3248 | goto end; |
3249 | ||
3250 | end_unset_name: | |
3251 | trigger_status = lttng_trigger_set_name(trigger, NULL); | |
3252 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3253 | ret = -LTTNG_ERR_UNK; | |
3254 | } | |
a58c490f | 3255 | end: |
99608320 JR |
3256 | lttng_payload_reset(&message); |
3257 | lttng_payload_reset(&reply); | |
242388e4 | 3258 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3259 | return ret; |
3260 | } | |
3261 | ||
a5c2d2a7 JG |
3262 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3263 | { | |
3264 | /* Register an anonymous trigger. */ | |
3265 | return _lttng_register_trigger(trigger, NULL, false); | |
3266 | } | |
3267 | ||
3268 | enum lttng_error_code lttng_register_trigger_with_name( | |
3269 | struct lttng_trigger *trigger, const char *name) | |
3270 | { | |
3271 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3272 | ||
3273 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3274 | } | |
3275 | ||
3276 | enum lttng_error_code lttng_register_trigger_with_automatic_name( | |
3277 | struct lttng_trigger *trigger) | |
3278 | { | |
4bd69c5f | 3279 | const int ret = _lttng_register_trigger(trigger, nullptr, true); |
a5c2d2a7 JG |
3280 | |
3281 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3282 | } | |
3283 | ||
b99a0cb3 JG |
3284 | enum lttng_error_code lttng_error_query_execute( |
3285 | const struct lttng_error_query *query, | |
3286 | const struct lttng_endpoint *endpoint, | |
3287 | struct lttng_error_query_results **results) | |
3288 | { | |
3289 | int ret; | |
3290 | enum lttng_error_code ret_code; | |
3291 | struct lttcomm_session_msg lsm = { | |
3292 | .cmd_type = LTTNG_EXECUTE_ERROR_QUERY, | |
3293 | }; | |
3294 | struct lttng_payload message; | |
3295 | struct lttng_payload reply; | |
3296 | struct lttcomm_session_msg *message_lsm; | |
3297 | ||
3298 | lttng_payload_init(&message); | |
3299 | lttng_payload_init(&reply); | |
3300 | ||
3301 | if (!query || !results) { | |
3302 | ret_code = LTTNG_ERR_INVALID; | |
3303 | goto end; | |
3304 | } | |
3305 | ||
3306 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3307 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3308 | goto end; | |
3309 | } | |
3310 | ||
3311 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3312 | if (ret) { | |
3313 | ret_code = LTTNG_ERR_NOMEM; | |
3314 | goto end; | |
3315 | } | |
3316 | ||
3317 | ret = lttng_error_query_serialize(query, &message); | |
3318 | if (ret) { | |
3319 | ret_code = LTTNG_ERR_UNK; | |
3320 | goto end; | |
3321 | } | |
3322 | ||
3323 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3324 | message_lsm->u.error_query.length = | |
3325 | (uint32_t) message.buffer.size - sizeof(lsm); | |
3326 | ||
3327 | { | |
3328 | struct lttng_payload_view message_view = | |
3329 | lttng_payload_view_from_payload( | |
3330 | &message, 0, -1); | |
3331 | ||
3332 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3333 | &message_view); | |
3334 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3335 | if (ret < 0) { | |
4bd69c5f | 3336 | ret_code =(lttng_error_code) -ret; |
b99a0cb3 JG |
3337 | goto end; |
3338 | } | |
3339 | } | |
3340 | ||
3341 | { | |
3342 | ssize_t reply_create_ret; | |
3343 | struct lttng_payload_view reply_view = | |
3344 | lttng_payload_view_from_payload( | |
3345 | &reply, 0, reply.buffer.size); | |
3346 | ||
3347 | reply_create_ret = lttng_error_query_results_create_from_payload( | |
3348 | &reply_view, results); | |
3349 | if (reply_create_ret < 0) { | |
3350 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3351 | goto end; | |
3352 | } | |
3353 | } | |
3354 | ||
3355 | ret_code = LTTNG_OK; | |
3356 | end: | |
3357 | lttng_payload_reset(&message); | |
3358 | lttng_payload_reset(&reply); | |
3359 | return ret_code; | |
3360 | } | |
3361 | ||
b61776fb | 3362 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3363 | { |
3364 | int ret; | |
3365 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3366 | struct lttcomm_session_msg *message_lsm; |
3367 | struct lttng_payload message; | |
3368 | struct lttng_payload reply; | |
b61776fb | 3369 | struct lttng_trigger *copy = NULL; |
64eafdf6 JR |
3370 | const struct lttng_credentials user_creds = { |
3371 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3372 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3373 | }; | |
99608320 JR |
3374 | |
3375 | lttng_payload_init(&message); | |
3376 | lttng_payload_init(&reply); | |
a58c490f JG |
3377 | |
3378 | if (!trigger) { | |
3379 | ret = -LTTNG_ERR_INVALID; | |
3380 | goto end; | |
3381 | } | |
3382 | ||
b61776fb SM |
3383 | copy = lttng_trigger_copy(trigger); |
3384 | if (!copy) { | |
3385 | ret = -LTTNG_ERR_UNK; | |
3386 | goto end; | |
3387 | } | |
3388 | ||
3389 | if (!copy->creds.uid.is_set) { | |
3390 | /* Use the client credentials as the trigger credentials */ | |
3391 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3392 | } else { |
3393 | /* | |
3394 | * Validate that either the current trigger credentials and the | |
3395 | * client credentials are identical or that the current user is | |
3396 | * root. The root user can register, unregister triggers for | |
3397 | * himself and other users. | |
3398 | * | |
3399 | * This check is also present on the sessiond side, using the | |
3400 | * credentials passed on the socket. These check are all | |
3401 | * "safety" checks. | |
3402 | */ | |
3403 | const struct lttng_credentials *trigger_creds = | |
b61776fb | 3404 | lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3405 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3406 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3407 | ret = -LTTNG_ERR_EPERM; | |
3408 | goto end; | |
3409 | } | |
3410 | } | |
3411 | } | |
3412 | ||
b61776fb | 3413 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3414 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3415 | goto end; |
3416 | } | |
3417 | ||
99608320 JR |
3418 | memset(&lsm, 0, sizeof(lsm)); |
3419 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3420 | ||
97285430 JG |
3421 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3422 | if (ret) { | |
3423 | ret = -LTTNG_ERR_NOMEM; | |
3424 | goto end; | |
3425 | } | |
99608320 | 3426 | |
b61776fb | 3427 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3428 | if (ret < 0) { |
a58c490f JG |
3429 | ret = -LTTNG_ERR_UNK; |
3430 | goto end; | |
3431 | } | |
3432 | ||
b0a79813 FD |
3433 | /* |
3434 | * This is needed to populate the trigger object size for the command | |
3435 | * header and number of fds sent. | |
3436 | */ | |
3437 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3438 | ||
99608320 JR |
3439 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3440 | ||
3441 | { | |
3442 | struct lttng_payload_view message_view = | |
3443 | lttng_payload_view_from_payload( | |
3444 | &message, 0, -1); | |
3445 | ||
3446 | /* | |
3447 | * Update the message header with the number of fd that will be | |
3448 | * sent. | |
3449 | */ | |
3450 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3451 | &message_view); | |
3452 | ||
3453 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3454 | if (ret < 0) { | |
3455 | goto end; | |
3456 | } | |
3457 | } | |
3458 | ||
3459 | ret = 0; | |
a58c490f | 3460 | end: |
b61776fb | 3461 | lttng_trigger_destroy(copy); |
99608320 JR |
3462 | lttng_payload_reset(&message); |
3463 | lttng_payload_reset(&reply); | |
a58c490f JG |
3464 | return ret; |
3465 | } | |
3466 | ||
fbc9f37d JR |
3467 | /* |
3468 | * Ask the session daemon for all registered triggers for the current user. | |
3469 | * | |
3470 | * Allocates and return an lttng_triggers set. | |
3471 | * On error, returns a suitable lttng_error_code. | |
3472 | */ | |
3473 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3474 | { | |
3475 | int ret; | |
3476 | enum lttng_error_code ret_code = LTTNG_OK; | |
3477 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS }; | |
3478 | struct lttng_triggers *local_triggers = NULL; | |
3479 | struct lttng_payload reply; | |
3480 | struct lttng_payload_view lsm_view = | |
3481 | lttng_payload_view_init_from_buffer( | |
3482 | (const char *) &lsm, 0, sizeof(lsm)); | |
3483 | ||
3484 | lttng_payload_init(&reply); | |
3485 | ||
3486 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3487 | if (ret < 0) { | |
3488 | ret_code = (enum lttng_error_code) -ret; | |
3489 | goto end; | |
3490 | } | |
3491 | ||
3492 | { | |
3493 | struct lttng_payload_view reply_view = | |
3494 | lttng_payload_view_from_payload( | |
3495 | &reply, 0, reply.buffer.size); | |
3496 | ||
3497 | ret = lttng_triggers_create_from_payload( | |
3498 | &reply_view, &local_triggers); | |
3499 | if (ret < 0) { | |
3500 | ret_code = LTTNG_ERR_FATAL; | |
3501 | goto end; | |
3502 | } | |
3503 | } | |
3504 | ||
3505 | *triggers = local_triggers; | |
3506 | local_triggers = NULL; | |
3507 | end: | |
3508 | lttng_payload_reset(&reply); | |
3509 | lttng_triggers_destroy(local_triggers); | |
3510 | return ret_code; | |
3511 | } | |
3512 | ||
fac6795d | 3513 | /* |
9ae110e2 | 3514 | * lib constructor. |
fac6795d | 3515 | */ |
b2b89e8a | 3516 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3517 | { |
3518 | /* Set default session group */ | |
bbccc3d2 | 3519 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3520 | } |
49cca668 DG |
3521 | |
3522 | /* | |
9ae110e2 | 3523 | * lib destructor. |
49cca668 | 3524 | */ |
b2b89e8a | 3525 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3526 | { |
3527 | free(tracing_group); | |
3528 | } |