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 |
28ab034a | 14 | #include "lttng-ctl-helper.hpp" |
fac6795d | 15 | |
c9e313bc | 16 | #include <common/align.hpp> |
28ab034a | 17 | #include <common/bytecode/bytecode.hpp> |
c9e313bc SM |
18 | #include <common/common.hpp> |
19 | #include <common/compat/errno.hpp> | |
20 | #include <common/compat/string.hpp> | |
21 | #include <common/defaults.hpp> | |
22 | #include <common/dynamic-array.hpp> | |
23 | #include <common/dynamic-buffer.hpp> | |
28ab034a JG |
24 | #include <common/filter/filter-ast.hpp> |
25 | #include <common/filter/filter-parser.hpp> | |
26 | #include <common/filter/memstream.hpp> | |
c9e313bc SM |
27 | #include <common/payload-view.hpp> |
28 | #include <common/payload.hpp> | |
29 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
30 | #include <common/tracker.hpp> | |
31 | #include <common/unix.hpp> | |
32 | #include <common/uri.hpp> | |
33 | #include <common/utils.hpp> | |
28ab034a | 34 | |
c9e313bc | 35 | #include <lttng/channel-internal.hpp> |
159b042f JG |
36 | #include <lttng/destruction-handle.h> |
37 | #include <lttng/endpoint.h> | |
c9e313bc SM |
38 | #include <lttng/error-query-internal.hpp> |
39 | #include <lttng/event-internal.hpp> | |
40 | #include <lttng/health-internal.hpp> | |
b99a0cb3 | 41 | #include <lttng/lttng-error.h> |
159b042f | 42 | #include <lttng/lttng.h> |
c9e313bc SM |
43 | #include <lttng/session-descriptor-internal.hpp> |
44 | #include <lttng/session-internal.hpp> | |
45 | #include <lttng/trigger/trigger-internal.hpp> | |
46 | #include <lttng/userspace-probe-internal.hpp> | |
fac6795d | 47 | |
28ab034a JG |
48 | #include <grp.h> |
49 | #include <stdint.h> | |
50 | #include <stdio.h> | |
51 | #include <stdlib.h> | |
52 | #include <string.h> | |
53 | #include <unistd.h> | |
53a80697 | 54 | |
28ab034a JG |
55 | #define COPY_DOMAIN_PACKED(dst, src) \ |
56 | do { \ | |
57 | struct lttng_domain _tmp_domain; \ | |
58 | \ | |
59 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
60 | dst = _tmp_domain; \ | |
61 | } while (0) | |
53a80697 | 62 | |
fac6795d | 63 | /* Socket to session daemon for communication */ |
3e3665b8 | 64 | static int sessiond_socket = -1; |
fac6795d DG |
65 | static char sessiond_sock_path[PATH_MAX]; |
66 | ||
fac6795d DG |
67 | /* Variables */ |
68 | static char *tracing_group; | |
69 | static int connected; | |
70 | ||
97e19046 DG |
71 | /* Global */ |
72 | ||
73 | /* | |
74 | * Those two variables are used by error.h to silent or control the verbosity of | |
75 | * error message. They are global to the library so application linking with it | |
76 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 | 77 | */ |
4bd69c5f SM |
78 | LTTNG_EXPORT int lttng_opt_quiet; |
79 | LTTNG_EXPORT int lttng_opt_verbose; | |
80 | LTTNG_EXPORT int lttng_opt_mi; | |
97e19046 | 81 | |
fac6795d | 82 | /* |
cd80958d | 83 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 84 | * |
cd80958d DG |
85 | * If domain is unknown, default domain will be the kernel. |
86 | */ | |
28ab034a | 87 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, struct lttng_domain *src) |
cd80958d DG |
88 | { |
89 | if (src && dst) { | |
90 | switch (src->type) { | |
00e2e675 DG |
91 | case LTTNG_DOMAIN_KERNEL: |
92 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 93 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 94 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 95 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
96 | memcpy(dst, src, sizeof(struct lttng_domain)); |
97 | break; | |
98 | default: | |
99 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 100 | break; |
cd80958d DG |
101 | } |
102 | } | |
103 | } | |
104 | ||
105 | /* | |
106 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 107 | * |
1c8d13c8 TD |
108 | * On success, returns the number of bytes sent (>=0) |
109 | * On error, returns -1 | |
fac6795d | 110 | */ |
cd80958d | 111 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
112 | { |
113 | int ret; | |
114 | ||
115 | if (!connected) { | |
2f70b271 | 116 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 117 | goto end; |
fac6795d DG |
118 | } |
119 | ||
28ab034a JG |
120 | DBG("LSM cmd type: '%s' (%d)", |
121 | lttcomm_sessiond_command_str((lttcomm_sessiond_command) lsm->cmd_type), | |
122 | lsm->cmd_type); | |
a4b92340 | 123 | |
28ab034a JG |
124 | ret = lttcomm_send_creds_unix_sock( |
125 | sessiond_socket, lsm, sizeof(struct lttcomm_session_msg)); | |
2f70b271 DG |
126 | if (ret < 0) { |
127 | ret = -LTTNG_ERR_FATAL; | |
128 | } | |
e065084a DG |
129 | |
130 | end: | |
131 | return ret; | |
132 | } | |
133 | ||
53a80697 MD |
134 | /* |
135 | * Send var len data to the session daemon. | |
136 | * | |
137 | * On success, returns the number of bytes sent (>=0) | |
138 | * On error, returns -1 | |
139 | */ | |
c2d69327 | 140 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
141 | { |
142 | int ret; | |
143 | ||
144 | if (!connected) { | |
2f70b271 | 145 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
146 | goto end; |
147 | } | |
a4b92340 | 148 | |
53a80697 MD |
149 | if (!data || !len) { |
150 | ret = 0; | |
151 | goto end; | |
152 | } | |
153 | ||
154 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
155 | if (ret < 0) { |
156 | ret = -LTTNG_ERR_FATAL; | |
157 | } | |
53a80697 MD |
158 | |
159 | end: | |
160 | return ret; | |
161 | } | |
162 | ||
a04d53fc FD |
163 | /* |
164 | * Send file descriptors to the session daemon. | |
165 | * | |
166 | * On success, returns the number of bytes sent (>=0) | |
167 | * On error, returns -1 | |
168 | */ | |
169 | static int send_session_fds(const int *fds, size_t nb_fd) | |
170 | { | |
171 | int ret; | |
172 | ||
173 | if (!connected) { | |
174 | ret = -LTTNG_ERR_NO_SESSIOND; | |
175 | goto end; | |
176 | } | |
177 | ||
178 | if (!fds || !nb_fd) { | |
179 | ret = 0; | |
180 | goto end; | |
181 | } | |
182 | ||
183 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
184 | if (ret < 0) { | |
185 | ret = -LTTNG_ERR_FATAL; | |
186 | } | |
187 | ||
188 | end: | |
189 | return ret; | |
190 | } | |
191 | ||
e065084a | 192 | /* |
cd80958d | 193 | * Receive data from the sessiond socket. |
e065084a | 194 | * |
1c8d13c8 | 195 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 196 | * On error, returns a negative lttng_error_code. |
e065084a | 197 | */ |
ca95a216 | 198 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
199 | { |
200 | int ret; | |
201 | ||
a0377dfe | 202 | LTTNG_ASSERT(len > 0); |
bacc41cc | 203 | |
e065084a | 204 | if (!connected) { |
2f70b271 | 205 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 206 | goto end; |
fac6795d DG |
207 | } |
208 | ||
ca95a216 | 209 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
210 | if (ret < 0) { |
211 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
212 | } else if (ret == 0) { |
213 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 214 | } |
fac6795d | 215 | |
e065084a | 216 | end: |
fac6795d DG |
217 | return ret; |
218 | } | |
219 | ||
e368fb43 JG |
220 | /* |
221 | * Receive a payload from the session daemon by appending to an existing | |
222 | * payload. | |
223 | * On success, returns the number of bytes received (>=0) | |
224 | * On error, returns a negative lttng_error_code. | |
225 | */ | |
226 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
227 | { | |
228 | int ret; | |
229 | const size_t original_payload_size = payload->buffer.size; | |
230 | ||
28ab034a | 231 | ret = lttng_dynamic_buffer_set_size(&payload->buffer, payload->buffer.size + len); |
e368fb43 JG |
232 | if (ret) { |
233 | ret = -LTTNG_ERR_NOMEM; | |
234 | goto end; | |
235 | } | |
236 | ||
28ab034a | 237 | ret = recv_data_sessiond(payload->buffer.data + original_payload_size, len); |
e368fb43 JG |
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 */ | |
64803277 | 268 | grp_list = calloc<gid_t>(grp_list_size); |
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 | ||
28ab034a | 293 | static enum lttng_error_code check_enough_available_memory(uint64_t num_bytes_requested_per_cpu) |
09b72f7a FD |
294 | { |
295 | int ret; | |
13dd7782 | 296 | enum lttng_error_code ret_code; |
09b72f7a | 297 | long num_cpu; |
13dd7782 JR |
298 | uint64_t best_mem_info; |
299 | uint64_t num_bytes_requested_total; | |
09b72f7a FD |
300 | |
301 | /* | |
302 | * Get the number of CPU currently online to compute the amount of | |
303 | * memory needed to create a buffer for every CPU. | |
304 | */ | |
305 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
306 | if (num_cpu == -1) { | |
13dd7782 JR |
307 | ret_code = LTTNG_ERR_FATAL; |
308 | goto end; | |
309 | } | |
310 | ||
311 | if (num_bytes_requested_per_cpu > UINT64_MAX / (uint64_t) num_cpu) { | |
312 | /* Overflow */ | |
313 | ret_code = LTTNG_ERR_OVERFLOW; | |
314 | goto end; | |
09b72f7a FD |
315 | } |
316 | ||
28ab034a | 317 | num_bytes_requested_total = num_bytes_requested_per_cpu * (uint64_t) num_cpu; |
09b72f7a FD |
318 | |
319 | /* | |
320 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
321 | * reliable estimate we can get but it is only exposed by the kernel | |
322 | * since 3.14. (See Linux kernel commit: | |
323 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
324 | */ | |
325 | ret = utils_get_memory_available(&best_mem_info); | |
326 | if (ret >= 0) { | |
327 | goto success; | |
328 | } | |
329 | ||
330 | /* | |
331 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
332 | * is a sanity check for obvious user error. | |
333 | */ | |
334 | ret = utils_get_memory_total(&best_mem_info); | |
335 | if (ret >= 0) { | |
336 | goto success; | |
337 | } | |
338 | ||
13dd7782 JR |
339 | /* No valid source of information. */ |
340 | ret_code = LTTNG_ERR_NOMEM; | |
341 | goto end; | |
342 | ||
09b72f7a | 343 | success: |
13dd7782 JR |
344 | if (best_mem_info >= num_bytes_requested_total) { |
345 | ret_code = LTTNG_OK; | |
346 | } else { | |
347 | ret_code = LTTNG_ERR_NOMEM; | |
348 | } | |
349 | end: | |
350 | return ret_code; | |
09b72f7a FD |
351 | } |
352 | ||
947308c4 | 353 | /* |
2269e89e DG |
354 | * Try connect to session daemon with sock_path. |
355 | * | |
356 | * Return 0 on success, else -1 | |
357 | */ | |
358 | static int try_connect_sessiond(const char *sock_path) | |
359 | { | |
360 | int ret; | |
361 | ||
362 | /* If socket exist, we check if the daemon listens for connect. */ | |
363 | ret = access(sock_path, F_OK); | |
364 | if (ret < 0) { | |
365 | /* Not alive */ | |
2f70b271 | 366 | goto error; |
2269e89e DG |
367 | } |
368 | ||
369 | ret = lttcomm_connect_unix_sock(sock_path); | |
370 | if (ret < 0) { | |
9ae110e2 | 371 | /* Not alive. */ |
2f70b271 | 372 | goto error; |
2269e89e DG |
373 | } |
374 | ||
375 | ret = lttcomm_close_unix_sock(ret); | |
376 | if (ret < 0) { | |
6f04ed72 | 377 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
378 | } |
379 | ||
380 | return 0; | |
2f70b271 DG |
381 | |
382 | error: | |
383 | return -1; | |
2269e89e DG |
384 | } |
385 | ||
386 | /* | |
2f70b271 DG |
387 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
388 | * variable. | |
389 | * | |
390 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
391 | * is somehow too long or ENOMEM). | |
947308c4 DG |
392 | */ |
393 | static int set_session_daemon_path(void) | |
394 | { | |
28ab034a | 395 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
396 | uid_t uid; |
397 | ||
398 | uid = getuid(); | |
947308c4 | 399 | |
2269e89e DG |
400 | if (uid != 0) { |
401 | /* Are we in the tracing group ? */ | |
6c71277b | 402 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
403 | } |
404 | ||
c295ec41 | 405 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 | 406 | const int ret = lttng_strncpy(sessiond_sock_path, |
28ab034a JG |
407 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, |
408 | sizeof(sessiond_sock_path)); | |
e1b624d0 JG |
409 | |
410 | if (ret) { | |
411 | goto error; | |
412 | } | |
08a9c49f | 413 | } |
2269e89e | 414 | |
08a9c49f | 415 | if (uid != 0) { |
c617c0c6 MD |
416 | int ret; |
417 | ||
08a9c49f | 418 | if (in_tgroup) { |
9ae110e2 | 419 | /* Tracing group. */ |
08a9c49f TD |
420 | ret = try_connect_sessiond(sessiond_sock_path); |
421 | if (ret >= 0) { | |
422 | goto end; | |
2269e89e | 423 | } |
08a9c49f | 424 | /* Global session daemon not available... */ |
2269e89e | 425 | } |
08a9c49f TD |
426 | /* ...or not in tracing group (and not root), default */ |
427 | ||
428 | /* | |
9ae110e2 JG |
429 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
430 | * is too small; | |
431 | * With GNU C >= 2.1, snprintf returns the required size | |
432 | * (excluding closing null) | |
08a9c49f | 433 | */ |
28ab034a JG |
434 | ret = snprintf(sessiond_sock_path, |
435 | sizeof(sessiond_sock_path), | |
436 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
437 | utils_get_home_dir()); | |
08a9c49f | 438 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 439 | goto error; |
947308c4 | 440 | } |
947308c4 | 441 | } |
08a9c49f | 442 | end: |
947308c4 | 443 | return 0; |
2f70b271 DG |
444 | |
445 | error: | |
446 | return -1; | |
947308c4 DG |
447 | } |
448 | ||
65beb5ff | 449 | /* |
9ae110e2 | 450 | * Connect to the LTTng session daemon. |
65beb5ff | 451 | * |
3e3665b8 | 452 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 453 | */ |
ca806b0b | 454 | int connect_sessiond(void) |
65beb5ff DG |
455 | { |
456 | int ret; | |
457 | ||
458 | ret = set_session_daemon_path(); | |
459 | if (ret < 0) { | |
2f70b271 | 460 | goto error; |
65beb5ff DG |
461 | } |
462 | ||
9ae110e2 | 463 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
464 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
465 | if (ret < 0) { | |
2f70b271 | 466 | goto error; |
65beb5ff DG |
467 | } |
468 | ||
3e3665b8 | 469 | return ret; |
2f70b271 DG |
470 | |
471 | error: | |
472 | return -1; | |
65beb5ff DG |
473 | } |
474 | ||
3e3665b8 JG |
475 | static void reset_global_sessiond_connection_state(void) |
476 | { | |
477 | sessiond_socket = -1; | |
478 | connected = 0; | |
479 | } | |
480 | ||
65beb5ff | 481 | /* |
1c8d13c8 | 482 | * Clean disconnect from the session daemon. |
9ae110e2 | 483 | * |
1c8d13c8 | 484 | * On success, return 0. On error, return -1. |
65beb5ff DG |
485 | */ |
486 | static int disconnect_sessiond(void) | |
487 | { | |
488 | int ret = 0; | |
489 | ||
490 | if (connected) { | |
491 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 492 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
493 | } |
494 | ||
495 | return ret; | |
496 | } | |
497 | ||
28ab034a | 498 | static int recv_sessiond_optional_data(size_t len, void **user_buf, size_t *user_len) |
795a978d PP |
499 | { |
500 | int ret = 0; | |
64803277 | 501 | char *buf = NULL; |
795a978d PP |
502 | |
503 | if (len) { | |
504 | if (!user_len) { | |
505 | ret = -LTTNG_ERR_INVALID; | |
506 | goto end; | |
507 | } | |
508 | ||
64803277 | 509 | buf = zmalloc<char>(len); |
795a978d PP |
510 | if (!buf) { |
511 | ret = -ENOMEM; | |
512 | goto end; | |
513 | } | |
514 | ||
515 | ret = recv_data_sessiond(buf, len); | |
516 | if (ret < 0) { | |
517 | goto end; | |
518 | } | |
519 | ||
520 | if (!user_buf) { | |
521 | ret = -LTTNG_ERR_INVALID; | |
522 | goto end; | |
523 | } | |
524 | ||
525 | /* Move ownership of command header buffer to user. */ | |
526 | *user_buf = buf; | |
527 | buf = NULL; | |
528 | *user_len = len; | |
529 | } else { | |
530 | /* No command header. */ | |
531 | if (user_len) { | |
532 | *user_len = 0; | |
533 | } | |
534 | ||
535 | if (user_buf) { | |
536 | *user_buf = NULL; | |
537 | } | |
538 | } | |
539 | ||
540 | end: | |
541 | free(buf); | |
542 | return ret; | |
543 | } | |
544 | ||
35a6fdb7 | 545 | /* |
cd80958d | 546 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
547 | * Takes extra var. len. data and file descriptors as input to send to the |
548 | * session daemon. | |
65beb5ff | 549 | * |
af87c45a | 550 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 551 | */ |
a04d53fc | 552 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
28ab034a JG |
553 | const int *fds, |
554 | size_t nb_fd, | |
555 | const void *vardata, | |
556 | size_t vardata_len, | |
557 | void **user_payload_buf, | |
558 | void **user_cmd_header_buf, | |
559 | size_t *user_cmd_header_len) | |
65beb5ff DG |
560 | { |
561 | int ret; | |
795a978d | 562 | size_t payload_len; |
cd80958d | 563 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
564 | |
565 | ret = connect_sessiond(); | |
566 | if (ret < 0) { | |
2f70b271 | 567 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 568 | goto end; |
3e3665b8 JG |
569 | } else { |
570 | sessiond_socket = ret; | |
571 | connected = 1; | |
65beb5ff DG |
572 | } |
573 | ||
cd80958d | 574 | ret = send_session_msg(lsm); |
65beb5ff | 575 | if (ret < 0) { |
2f70b271 | 576 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
577 | goto end; |
578 | } | |
53a80697 | 579 | /* Send var len data */ |
795a978d | 580 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 581 | if (ret < 0) { |
2f70b271 | 582 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
583 | goto end; |
584 | } | |
65beb5ff | 585 | |
a04d53fc FD |
586 | /* Send fds */ |
587 | ret = send_session_fds(fds, nb_fd); | |
588 | if (ret < 0) { | |
589 | /* Ret value is a valid lttng error code. */ | |
590 | goto end; | |
591 | } | |
592 | ||
65beb5ff DG |
593 | /* Get header from data transmission */ |
594 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
595 | if (ret < 0) { | |
2f70b271 | 596 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
597 | goto end; |
598 | } | |
599 | ||
600 | /* Check error code if OK */ | |
f73fabfd | 601 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
602 | ret = -llm.ret_code; |
603 | goto end; | |
604 | } | |
605 | ||
795a978d | 606 | /* Get command header from data transmission */ |
28ab034a JG |
607 | ret = recv_sessiond_optional_data( |
608 | llm.cmd_header_size, user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 609 | if (ret < 0) { |
65beb5ff DG |
610 | goto end; |
611 | } | |
612 | ||
795a978d | 613 | /* Get payload from data transmission */ |
28ab034a | 614 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, &payload_len); |
795a978d | 615 | if (ret < 0) { |
83009e5e DG |
616 | goto end; |
617 | } | |
618 | ||
795a978d | 619 | ret = llm.data_size; |
65beb5ff DG |
620 | |
621 | end: | |
622 | disconnect_sessiond(); | |
623 | return ret; | |
624 | } | |
625 | ||
28ab034a | 626 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, struct lttng_payload *reply) |
e368fb43 JG |
627 | { |
628 | int ret; | |
629 | struct lttcomm_lttng_msg llm; | |
fe489250 | 630 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 | 631 | |
a0377dfe FD |
632 | LTTNG_ASSERT(reply->buffer.size == 0); |
633 | LTTNG_ASSERT(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); | |
e368fb43 JG |
634 | |
635 | ret = connect_sessiond(); | |
636 | if (ret < 0) { | |
637 | ret = -LTTNG_ERR_NO_SESSIOND; | |
638 | goto end; | |
639 | } else { | |
640 | sessiond_socket = ret; | |
641 | connected = 1; | |
642 | } | |
643 | ||
644 | /* Send command to session daemon */ | |
28ab034a JG |
645 | ret = lttcomm_send_creds_unix_sock( |
646 | sessiond_socket, message->buffer.data, message->buffer.size); | |
e368fb43 JG |
647 | if (ret < 0) { |
648 | ret = -LTTNG_ERR_FATAL; | |
649 | goto end; | |
650 | } | |
651 | ||
fe489250 | 652 | if (fd_count > 0) { |
28ab034a | 653 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, message); |
fe489250 JG |
654 | if (ret < 0) { |
655 | ret = -LTTNG_ERR_FATAL; | |
656 | goto end; | |
657 | } | |
e368fb43 JG |
658 | } |
659 | ||
660 | /* Get header from data transmission */ | |
661 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
662 | if (ret < 0) { | |
663 | /* Ret value is a valid lttng error code. */ | |
664 | goto end; | |
665 | } | |
666 | ||
667 | llm = *((typeof(llm) *) reply->buffer.data); | |
668 | ||
669 | /* Check error code if OK */ | |
670 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
671 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
672 | /* Invalid error code received. */ | |
673 | ret = -LTTNG_ERR_UNK; | |
674 | } else { | |
675 | ret = -llm.ret_code; | |
676 | } | |
e368fb43 JG |
677 | goto end; |
678 | } | |
679 | ||
680 | if (llm.cmd_header_size > 0) { | |
681 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
682 | if (ret < 0) { | |
683 | goto end; | |
684 | } | |
685 | } | |
686 | ||
687 | /* Get command header from data transmission */ | |
688 | if (llm.data_size > 0) { | |
689 | ret = recv_payload_sessiond(reply, llm.data_size); | |
690 | if (ret < 0) { | |
691 | goto end; | |
692 | } | |
693 | } | |
694 | ||
695 | if (llm.fd_count > 0) { | |
28ab034a | 696 | ret = lttcomm_recv_payload_fds_unix_sock(sessiond_socket, llm.fd_count, reply); |
fe489250 | 697 | if (ret < 0) { |
e368fb43 JG |
698 | goto end; |
699 | } | |
700 | } | |
701 | ||
702 | /* Don't return the llm header to the caller. */ | |
28ab034a JG |
703 | memmove(reply->buffer.data, |
704 | reply->buffer.data + sizeof(llm), | |
705 | reply->buffer.size - sizeof(llm)); | |
706 | ret = lttng_dynamic_buffer_set_size(&reply->buffer, reply->buffer.size - sizeof(llm)); | |
e368fb43 JG |
707 | if (ret) { |
708 | /* Can't happen as size is reduced. */ | |
709 | abort(); | |
710 | } | |
711 | ||
712 | ret = reply->buffer.size; | |
713 | ||
714 | end: | |
715 | disconnect_sessiond(); | |
716 | return ret; | |
717 | } | |
718 | ||
9f19cc17 | 719 | /* |
cd80958d | 720 | * Create lttng handle and return pointer. |
9ae110e2 | 721 | * |
1c8d13c8 | 722 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 723 | */ |
28ab034a | 724 | struct lttng_handle *lttng_create_handle(const char *session_name, struct lttng_domain *domain) |
9f19cc17 | 725 | { |
e1b624d0 | 726 | int ret; |
2f70b271 DG |
727 | struct lttng_handle *handle = NULL; |
728 | ||
64803277 | 729 | handle = zmalloc<lttng_handle>(); |
cd80958d | 730 | if (handle == NULL) { |
2f70b271 | 731 | PERROR("malloc handle"); |
cd80958d DG |
732 | goto end; |
733 | } | |
734 | ||
735 | /* Copy session name */ | |
28ab034a | 736 | ret = lttng_strncpy(handle->session_name, session_name ?: "", sizeof(handle->session_name)); |
e1b624d0 JG |
737 | if (ret) { |
738 | goto error; | |
739 | } | |
cd80958d | 740 | |
95681498 JG |
741 | /* Copy lttng domain or leave initialized to 0. */ |
742 | if (domain) { | |
743 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
744 | } | |
cd80958d DG |
745 | |
746 | end: | |
747 | return handle; | |
e1b624d0 JG |
748 | error: |
749 | free(handle); | |
750 | return NULL; | |
cd80958d DG |
751 | } |
752 | ||
753 | /* | |
754 | * Destroy handle by free(3) the pointer. | |
755 | */ | |
756 | void lttng_destroy_handle(struct lttng_handle *handle) | |
757 | { | |
0e428499 | 758 | free(handle); |
eb354453 DG |
759 | } |
760 | ||
d9800920 DG |
761 | /* |
762 | * Register an outside consumer. | |
9ae110e2 | 763 | * |
1c8d13c8 | 764 | * Returns size of returned session payload data or a negative error code. |
d9800920 | 765 | */ |
28ab034a | 766 | int lttng_register_consumer(struct lttng_handle *handle, const char *socket_path) |
d9800920 | 767 | { |
e1b624d0 | 768 | int ret; |
d9800920 DG |
769 | struct lttcomm_session_msg lsm; |
770 | ||
2f70b271 | 771 | if (handle == NULL || socket_path == NULL) { |
e1b624d0 JG |
772 | ret = -LTTNG_ERR_INVALID; |
773 | goto end; | |
2f70b271 DG |
774 | } |
775 | ||
53efb85a | 776 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 777 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGISTER_CONSUMER; |
28ab034a | 778 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
779 | if (ret) { |
780 | ret = -LTTNG_ERR_INVALID; | |
781 | goto end; | |
782 | } | |
783 | ||
60160d2a | 784 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 785 | |
28ab034a | 786 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
e1b624d0 JG |
787 | if (ret) { |
788 | ret = -LTTNG_ERR_INVALID; | |
789 | goto end; | |
790 | } | |
d9800920 | 791 | |
e1b624d0 JG |
792 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
793 | end: | |
794 | return ret; | |
d9800920 DG |
795 | } |
796 | ||
1df4dedd | 797 | /* |
9ae110e2 JG |
798 | * Start tracing for all traces of the session. |
799 | * | |
800 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 801 | */ |
6a4f824d | 802 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 803 | { |
e1b624d0 | 804 | int ret; |
cd80958d DG |
805 | struct lttcomm_session_msg lsm; |
806 | ||
6a4f824d | 807 | if (session_name == NULL) { |
e1b624d0 JG |
808 | ret = -LTTNG_ERR_INVALID; |
809 | goto end; | |
cd80958d DG |
810 | } |
811 | ||
53efb85a | 812 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 813 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_START_TRACE; |
6a4f824d | 814 | |
28ab034a | 815 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
816 | if (ret) { |
817 | ret = -LTTNG_ERR_INVALID; | |
818 | goto end; | |
819 | } | |
cd80958d | 820 | |
e1b624d0 JG |
821 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
822 | end: | |
823 | return ret; | |
f3ed775e | 824 | } |
1df4dedd DG |
825 | |
826 | /* | |
38ee087f | 827 | * Stop tracing for all traces of the session. |
f3ed775e | 828 | */ |
38ee087f | 829 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 830 | { |
38ee087f | 831 | int ret, data_ret; |
cd80958d DG |
832 | struct lttcomm_session_msg lsm; |
833 | ||
6a4f824d | 834 | if (session_name == NULL) { |
e1b624d0 JG |
835 | ret = -LTTNG_ERR_INVALID; |
836 | goto error; | |
6a4f824d DG |
837 | } |
838 | ||
53efb85a | 839 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 840 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_STOP_TRACE; |
6a4f824d | 841 | |
28ab034a | 842 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
843 | if (ret) { |
844 | ret = -LTTNG_ERR_INVALID; | |
845 | goto error; | |
846 | } | |
cd80958d | 847 | |
cac3069d | 848 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
849 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
850 | goto error; | |
851 | } | |
852 | ||
853 | if (!wait) { | |
854 | goto end; | |
855 | } | |
856 | ||
38ee087f DG |
857 | /* Check for data availability */ |
858 | do { | |
6d805429 | 859 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
860 | if (data_ret < 0) { |
861 | /* Return the data available call error. */ | |
862 | ret = data_ret; | |
863 | goto error; | |
864 | } | |
865 | ||
866 | /* | |
9ae110e2 JG |
867 | * Data sleep time before retrying (in usec). Don't sleep if the |
868 | * call returned value indicates availability. | |
38ee087f | 869 | */ |
6d805429 | 870 | if (data_ret) { |
c8f61fd4 | 871 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 872 | } |
6d805429 | 873 | } while (data_ret != 0); |
38ee087f | 874 | |
38ee087f DG |
875 | end: |
876 | error: | |
877 | return ret; | |
878 | } | |
879 | ||
880 | /* | |
881 | * Stop tracing and wait for data availability. | |
882 | */ | |
883 | int lttng_stop_tracing(const char *session_name) | |
884 | { | |
885 | return _lttng_stop_tracing(session_name, 1); | |
886 | } | |
887 | ||
888 | /* | |
889 | * Stop tracing but _don't_ wait for data availability. | |
890 | */ | |
891 | int lttng_stop_tracing_no_wait(const char *session_name) | |
892 | { | |
893 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
894 | } |
895 | ||
896 | /* | |
601d5acf DG |
897 | * Add context to a channel. |
898 | * | |
899 | * If the given channel is NULL, add the contexts to all channels. | |
900 | * The event_name param is ignored. | |
af87c45a DG |
901 | * |
902 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 903 | */ |
cd80958d | 904 | int lttng_add_context(struct lttng_handle *handle, |
28ab034a JG |
905 | struct lttng_event_context *ctx, |
906 | const char *event_name __attribute__((unused)), | |
907 | const char *channel_name) | |
d65106b1 | 908 | { |
2001793c | 909 | int ret; |
1c9a0b0e | 910 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 911 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_ADD_CONTEXT, |
1c9a0b0e MJ |
912 | .session = {}, |
913 | .domain = {}, | |
914 | .u = {}, | |
915 | .fd_count = 0, | |
916 | }; | |
26e1c61f JR |
917 | struct lttng_payload payload; |
918 | ||
919 | lttng_payload_init(&payload); | |
cd80958d | 920 | |
9ae110e2 | 921 | /* Safety check. Both are mandatory. */ |
9d697d3d | 922 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
923 | ret = -LTTNG_ERR_INVALID; |
924 | goto end; | |
cd80958d DG |
925 | } |
926 | ||
26e1c61f JR |
927 | ret = lttng_dynamic_buffer_set_size(&payload.buffer, sizeof(lsm)); |
928 | if (ret) { | |
929 | ret = -LTTNG_ERR_NOMEM; | |
930 | goto end; | |
931 | } | |
cd80958d | 932 | |
85076754 | 933 | /* If no channel name, send empty string. */ |
28ab034a JG |
934 | ret = lttng_strncpy( |
935 | lsm.u.context.channel_name, channel_name ?: "", sizeof(lsm.u.context.channel_name)); | |
e1b624d0 JG |
936 | if (ret) { |
937 | ret = -LTTNG_ERR_INVALID; | |
938 | goto end; | |
85076754 | 939 | } |
cd80958d | 940 | |
60160d2a | 941 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
28ab034a | 942 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
943 | if (ret) { |
944 | ret = -LTTNG_ERR_INVALID; | |
945 | goto end; | |
946 | } | |
cd80958d | 947 | |
26e1c61f JR |
948 | ret = lttng_event_context_serialize(ctx, &payload); |
949 | if (ret) { | |
950 | ret = -LTTNG_ERR_INVALID; | |
951 | goto end; | |
952 | } | |
2001793c | 953 | |
26e1c61f | 954 | lsm.u.context.length = payload.buffer.size - sizeof(lsm); |
2001793c | 955 | |
26e1c61f JR |
956 | /* Update message header. */ |
957 | memcpy(payload.buffer.data, &lsm, sizeof(lsm)); | |
2001793c | 958 | |
26e1c61f JR |
959 | { |
960 | struct lttng_payload reply; | |
961 | struct lttng_payload_view payload_view = | |
28ab034a | 962 | lttng_payload_view_from_payload(&payload, 0, -1); |
2001793c | 963 | |
26e1c61f JR |
964 | lttng_payload_init(&reply); |
965 | ret = lttng_ctl_ask_sessiond_payload(&payload_view, &reply); | |
966 | lttng_payload_reset(&reply); | |
967 | if (ret) { | |
2001793c JG |
968 | goto end; |
969 | } | |
2001793c | 970 | } |
46f44e2a | 971 | |
2001793c | 972 | end: |
26e1c61f | 973 | lttng_payload_reset(&payload); |
2001793c | 974 | return ret; |
d65106b1 DG |
975 | } |
976 | ||
f3ed775e | 977 | /* |
9ae110e2 JG |
978 | * Enable event(s) for a channel. |
979 | * | |
980 | * If no event name is specified, all events are enabled. | |
981 | * If no channel name is specified, the default 'channel0' is used. | |
982 | * | |
983 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 984 | */ |
cd80958d | 985 | int lttng_enable_event(struct lttng_handle *handle, |
28ab034a JG |
986 | struct lttng_event *ev, |
987 | const char *channel_name) | |
1df4dedd | 988 | { |
28ab034a | 989 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, NULL, 0, NULL); |
1df4dedd DG |
990 | } |
991 | ||
53a80697 | 992 | /* |
025faf73 | 993 | * Create or enable an event with a filter expression. |
178191b3 | 994 | * |
53a80697 MD |
995 | * Return negative error value on error. |
996 | * Return size of returned session payload data if OK. | |
997 | */ | |
025faf73 | 998 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
28ab034a JG |
999 | struct lttng_event *event, |
1000 | const char *channel_name, | |
1001 | const char *filter_expression) | |
53a80697 | 1002 | { |
28ab034a JG |
1003 | return lttng_enable_event_with_exclusions( |
1004 | handle, event, channel_name, filter_expression, 0, NULL); | |
53a80697 MD |
1005 | } |
1006 | ||
347c5ab5 | 1007 | /* |
0e115563 | 1008 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1009 | * NULL if not applicable. |
1010 | * | |
1011 | * An event with NO loglevel and the name is * will return NULL. | |
1012 | */ | |
0e115563 | 1013 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1014 | { |
1015 | int err; | |
0e115563 | 1016 | char *agent_filter = NULL; |
347c5ab5 | 1017 | |
a0377dfe | 1018 | LTTNG_ASSERT(ev); |
347c5ab5 DG |
1019 | |
1020 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1021 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1022 | if (filter) { |
28ab034a JG |
1023 | err = asprintf( |
1024 | &agent_filter, "(%s) && (logger_name == \"%s\")", filter, ev->name); | |
347c5ab5 | 1025 | } else { |
0e115563 | 1026 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1027 | } |
1028 | if (err < 0) { | |
1029 | PERROR("asprintf"); | |
6a556f7b | 1030 | goto error; |
347c5ab5 DG |
1031 | } |
1032 | } | |
1033 | ||
1034 | /* Add loglevel filtering if any for the JUL domain. */ | |
1035 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1036 | const char *op; |
347c5ab5 DG |
1037 | |
1038 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1039 | op = ">="; | |
1040 | } else { | |
1041 | op = "=="; | |
1042 | } | |
1043 | ||
0e115563 | 1044 | if (filter || agent_filter) { |
6a556f7b JG |
1045 | char *new_filter; |
1046 | ||
28ab034a JG |
1047 | err = asprintf(&new_filter, |
1048 | "(%s) && (int_loglevel %s %d)", | |
1049 | agent_filter ? agent_filter : filter, | |
1050 | op, | |
1051 | ev->loglevel); | |
0e115563 DG |
1052 | if (agent_filter) { |
1053 | free(agent_filter); | |
6a556f7b | 1054 | } |
0e115563 | 1055 | agent_filter = new_filter; |
347c5ab5 | 1056 | } else { |
28ab034a | 1057 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, ev->loglevel); |
347c5ab5 DG |
1058 | } |
1059 | if (err < 0) { | |
1060 | PERROR("asprintf"); | |
6a556f7b | 1061 | goto error; |
347c5ab5 DG |
1062 | } |
1063 | } | |
1064 | ||
0e115563 | 1065 | return agent_filter; |
6a556f7b | 1066 | error: |
0e115563 | 1067 | free(agent_filter); |
6a556f7b | 1068 | return NULL; |
347c5ab5 DG |
1069 | } |
1070 | ||
93deb080 JI |
1071 | /* |
1072 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1073 | * If no event name is specified, all events are enabled. | |
1074 | * If no channel name is specified, the default name is used. | |
1075 | * If filter expression is not NULL, the filter is set for the event. | |
1076 | * If exclusion count is not zero, the exclusions are set for the event. | |
1077 | * Returns size of returned session payload data or a negative error code. | |
1078 | */ | |
1079 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
28ab034a JG |
1080 | struct lttng_event *ev, |
1081 | const char *channel_name, | |
1082 | const char *original_filter_expression, | |
1083 | int exclusion_count, | |
1084 | char **exclusion_list) | |
93deb080 | 1085 | { |
1c9a0b0e | 1086 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 1087 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_ENABLE_EVENT, |
1c9a0b0e MJ |
1088 | .session = {}, |
1089 | .domain = {}, | |
1090 | .u = {}, | |
1091 | .fd_count = 0, | |
1092 | }; | |
e368fb43 | 1093 | struct lttng_payload payload; |
8ddd72ef | 1094 | int ret = 0; |
137b9942 | 1095 | unsigned int free_filter_expression = 0; |
93deb080 | 1096 | struct filter_parser_ctx *ctx = NULL; |
8ddd72ef | 1097 | size_t bytecode_len = 0; |
ec005ec6 | 1098 | |
6a0838b7 YL |
1099 | /* |
1100 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1101 | * a variable-length payload from where to send the data. |
6a0838b7 | 1102 | */ |
e368fb43 | 1103 | lttng_payload_init(&payload); |
ec005ec6 | 1104 | |
e9efbcd3 JG |
1105 | /* |
1106 | * Cast as non-const since we may replace the filter expression | |
1107 | * by a dynamically allocated string. Otherwise, the original | |
1108 | * string is not modified. | |
1109 | */ | |
1110 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1111 | |
1112 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1113 | ret = -LTTNG_ERR_INVALID; |
1114 | goto error; | |
93deb080 JI |
1115 | } |
1116 | ||
9ae110e2 JG |
1117 | /* |
1118 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1119 | * anyway, so treat this corner-case early to eliminate |
1120 | * lttng_fmemopen error for 0-byte allocation. | |
1121 | */ | |
1122 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1123 | ret = -LTTNG_ERR_INVALID; |
1124 | goto error; | |
93deb080 JI |
1125 | } |
1126 | ||
18a720cd | 1127 | if (ev->name[0] == '\0') { |
e1b624d0 JG |
1128 | /* Enable all events. */ |
1129 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
a0377dfe | 1130 | LTTNG_ASSERT(ret == 0); |
6565421f | 1131 | } |
93deb080 | 1132 | |
9ae110e2 | 1133 | /* Parse filter expression. */ |
28ab034a JG |
1134 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL || |
1135 | handle->domain.type == LTTNG_DOMAIN_LOG4J || | |
1136 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1137 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a JG |
1138 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1139 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
0e115563 | 1140 | char *agent_filter; |
64226865 | 1141 | |
8ddd72ef | 1142 | /* Setup agent filter if needed. */ |
0e115563 DG |
1143 | agent_filter = set_agent_filter(filter_expression, ev); |
1144 | if (!agent_filter) { | |
137b9942 | 1145 | if (!filter_expression) { |
9ae110e2 JG |
1146 | /* |
1147 | * No JUL and no filter, just skip | |
1148 | * everything below. | |
1149 | */ | |
8ddd72ef | 1150 | goto serialize; |
137b9942 | 1151 | } |
64226865 DG |
1152 | } else { |
1153 | /* | |
9ae110e2 JG |
1154 | * With an agent filter, the original filter has |
1155 | * been added to it thus replace the filter | |
1156 | * expression. | |
64226865 | 1157 | */ |
0e115563 | 1158 | filter_expression = agent_filter; |
e9efbcd3 | 1159 | free_filter_expression = 1; |
9b21e6d5 | 1160 | } |
9b21e6d5 | 1161 | } |
93deb080 | 1162 | |
28ab034a | 1163 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == LTTNG_FILTER_MAX_LEN) { |
8ddd72ef JR |
1164 | ret = -LTTNG_ERR_FILTER_INVAL; |
1165 | goto error; | |
1166 | } | |
1167 | ||
e4d2f27a | 1168 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1169 | if (ret) { |
8ddd72ef | 1170 | goto error; |
93deb080 | 1171 | } |
e4d2f27a | 1172 | |
28ab034a | 1173 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + sizeof(ctx->bytecode->b); |
8ddd72ef JR |
1174 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { |
1175 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1176 | goto error; | |
1177 | } | |
6b453b5e JG |
1178 | } |
1179 | ||
8ddd72ef | 1180 | serialize: |
28ab034a JG |
1181 | ret = lttng_event_serialize(ev, |
1182 | exclusion_count, | |
1183 | exclusion_list, | |
1184 | filter_expression, | |
1185 | bytecode_len, | |
1186 | (ctx && bytecode_len) ? &ctx->bytecode->b : NULL, | |
1187 | &payload); | |
15e37663 | 1188 | if (ret) { |
8ddd72ef JR |
1189 | ret = -LTTNG_ERR_INVALID; |
1190 | goto error; | |
6b453b5e | 1191 | } |
137b9942 | 1192 | |
8ddd72ef | 1193 | /* If no channel name, send empty string. */ |
28ab034a JG |
1194 | ret = lttng_strncpy( |
1195 | lsm.u.enable.channel_name, channel_name ?: "", sizeof(lsm.u.enable.channel_name)); | |
8ddd72ef JR |
1196 | if (ret) { |
1197 | ret = -LTTNG_ERR_INVALID; | |
1198 | goto error; | |
6b453b5e | 1199 | } |
15e37663 | 1200 | |
8ddd72ef JR |
1201 | /* Domain */ |
1202 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
15e37663 | 1203 | |
8ddd72ef | 1204 | /* Session name */ |
28ab034a | 1205 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
8ddd72ef JR |
1206 | if (ret) { |
1207 | ret = -LTTNG_ERR_INVALID; | |
1208 | goto error; | |
93deb080 JI |
1209 | } |
1210 | ||
8ddd72ef JR |
1211 | /* Length of the serialized event. */ |
1212 | lsm.u.enable.length = (uint32_t) payload.buffer.size; | |
1213 | ||
e368fb43 | 1214 | { |
28ab034a | 1215 | struct lttng_payload_view view = lttng_payload_view_from_payload(&payload, 0, -1); |
fe489250 | 1216 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1217 | int fd_to_send; |
1218 | ||
1219 | if (fd_count < 0) { | |
8ddd72ef | 1220 | goto error; |
e368fb43 JG |
1221 | } |
1222 | ||
a0377dfe | 1223 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); |
e368fb43 | 1224 | if (fd_count == 1) { |
28ab034a | 1225 | struct fd_handle *h = lttng_payload_view_pop_fd_handle(&view); |
fe489250 | 1226 | |
e2fc8e9d | 1227 | if (!h) { |
8ddd72ef | 1228 | goto error; |
e368fb43 JG |
1229 | } |
1230 | ||
e2fc8e9d SM |
1231 | fd_to_send = fd_handle_get_fd(h); |
1232 | fd_handle_put(h); | |
e368fb43 JG |
1233 | } |
1234 | ||
8ddd72ef JR |
1235 | lsm.fd_count = fd_count; |
1236 | ||
e368fb43 | 1237 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
28ab034a JG |
1238 | fd_count ? &fd_to_send : NULL, |
1239 | fd_count, | |
1240 | view.buffer.size ? view.buffer.data : NULL, | |
1241 | view.buffer.size, | |
1242 | NULL, | |
1243 | NULL, | |
1244 | 0); | |
e368fb43 | 1245 | } |
93deb080 | 1246 | |
8ddd72ef | 1247 | error: |
7ca1dc6f | 1248 | if (filter_expression && ctx) { |
93deb080 JI |
1249 | filter_bytecode_free(ctx); |
1250 | filter_ir_free(ctx); | |
1251 | filter_parser_ctx_free(ctx); | |
7ca1dc6f | 1252 | } |
7ca1dc6f DG |
1253 | if (free_filter_expression) { |
1254 | /* | |
9ae110e2 JG |
1255 | * The filter expression has been replaced and must be freed as |
1256 | * it is not the original filter expression received as a | |
1257 | * parameter. | |
7ca1dc6f DG |
1258 | */ |
1259 | free(filter_expression); | |
93deb080 | 1260 | } |
137b9942 | 1261 | /* |
9ae110e2 JG |
1262 | * Return directly to the caller and don't ask the sessiond since |
1263 | * something went wrong in the parsing of data above. | |
137b9942 | 1264 | */ |
e368fb43 | 1265 | lttng_payload_reset(&payload); |
93deb080 JI |
1266 | return ret; |
1267 | } | |
1268 | ||
6e911cad | 1269 | int lttng_disable_event_ext(struct lttng_handle *handle, |
28ab034a JG |
1270 | struct lttng_event *ev, |
1271 | const char *channel_name, | |
1272 | const char *original_filter_expression) | |
1df4dedd | 1273 | { |
1c9a0b0e | 1274 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 1275 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_DISABLE_EVENT, |
1c9a0b0e MJ |
1276 | .session = {}, |
1277 | .domain = {}, | |
1278 | .u = {}, | |
1279 | .fd_count = 0, | |
1280 | }; | |
8ddd72ef | 1281 | struct lttng_payload payload; |
6e911cad MD |
1282 | int ret = 0; |
1283 | unsigned int free_filter_expression = 0; | |
1284 | struct filter_parser_ctx *ctx = NULL; | |
8ddd72ef JR |
1285 | size_t bytecode_len = 0; |
1286 | ||
1287 | /* | |
1288 | * We have either a filter or some exclusions, so we need to set up | |
1289 | * a variable-length payload from where to send the data. | |
1290 | */ | |
1291 | lttng_payload_init(&payload); | |
1292 | ||
6e911cad MD |
1293 | /* |
1294 | * Cast as non-const since we may replace the filter expression | |
1295 | * by a dynamically allocated string. Otherwise, the original | |
1296 | * string is not modified. | |
1297 | */ | |
1298 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1299 | |
6e911cad MD |
1300 | if (handle == NULL || ev == NULL) { |
1301 | ret = -LTTNG_ERR_INVALID; | |
1302 | goto error; | |
1303 | } | |
1304 | ||
9ae110e2 JG |
1305 | /* |
1306 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1307 | * anyway, so treat this corner-case early to eliminate |
1308 | * lttng_fmemopen error for 0-byte allocation. | |
1309 | */ | |
1310 | if (filter_expression && filter_expression[0] == '\0') { | |
1311 | ret = -LTTNG_ERR_INVALID; | |
1312 | goto error; | |
cd80958d DG |
1313 | } |
1314 | ||
8ddd72ef | 1315 | /* Parse filter expression. */ |
28ab034a JG |
1316 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL || |
1317 | handle->domain.type == LTTNG_DOMAIN_LOG4J || | |
1318 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1319 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a JG |
1320 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1321 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
0e115563 | 1322 | char *agent_filter; |
6e911cad | 1323 | |
8ddd72ef | 1324 | /* Setup agent filter if needed. */ |
0e115563 DG |
1325 | agent_filter = set_agent_filter(filter_expression, ev); |
1326 | if (!agent_filter) { | |
6e911cad | 1327 | if (!filter_expression) { |
9ae110e2 JG |
1328 | /* |
1329 | * No JUL and no filter, just skip | |
1330 | * everything below. | |
1331 | */ | |
8ddd72ef | 1332 | goto serialize; |
6e911cad MD |
1333 | } |
1334 | } else { | |
1335 | /* | |
8ddd72ef | 1336 | * With an agent filter, the original filter has |
9ae110e2 JG |
1337 | * been added to it thus replace the filter |
1338 | * expression. | |
6e911cad | 1339 | */ |
0e115563 | 1340 | filter_expression = agent_filter; |
6e911cad MD |
1341 | free_filter_expression = 1; |
1342 | } | |
1343 | } | |
1344 | ||
28ab034a | 1345 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == LTTNG_FILTER_MAX_LEN) { |
8ddd72ef JR |
1346 | ret = -LTTNG_ERR_FILTER_INVAL; |
1347 | goto error; | |
1348 | } | |
1349 | ||
e4d2f27a | 1350 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad | 1351 | if (ret) { |
8ddd72ef | 1352 | goto error; |
6e911cad | 1353 | } |
e4d2f27a | 1354 | |
28ab034a | 1355 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + sizeof(ctx->bytecode->b); |
8ddd72ef JR |
1356 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { |
1357 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1358 | goto error; | |
1359 | } | |
6e911cad MD |
1360 | } |
1361 | ||
8ddd72ef | 1362 | serialize: |
28ab034a JG |
1363 | ret = lttng_event_serialize(ev, |
1364 | 0, | |
1365 | NULL, | |
1366 | filter_expression, | |
1367 | bytecode_len, | |
1368 | (ctx && bytecode_len) ? &ctx->bytecode->b : NULL, | |
1369 | &payload); | |
8ddd72ef JR |
1370 | if (ret) { |
1371 | ret = -LTTNG_ERR_INVALID; | |
1372 | goto error; | |
6e911cad MD |
1373 | } |
1374 | ||
8ddd72ef | 1375 | /* If no channel name, send empty string. */ |
28ab034a JG |
1376 | ret = lttng_strncpy( |
1377 | lsm.u.disable.channel_name, channel_name ?: "", sizeof(lsm.u.disable.channel_name)); | |
8ddd72ef JR |
1378 | if (ret) { |
1379 | ret = -LTTNG_ERR_INVALID; | |
1380 | goto error; | |
6e911cad | 1381 | } |
8ddd72ef JR |
1382 | |
1383 | /* Domain */ | |
1384 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1385 | ||
1386 | /* Session name */ | |
28ab034a | 1387 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
8ddd72ef JR |
1388 | if (ret) { |
1389 | ret = -LTTNG_ERR_INVALID; | |
1390 | goto error; | |
6e911cad MD |
1391 | } |
1392 | ||
8ddd72ef JR |
1393 | /* Length of the serialized event. */ |
1394 | lsm.u.disable.length = (uint32_t) payload.buffer.size; | |
1395 | ||
1396 | { | |
28ab034a | 1397 | struct lttng_payload_view view = lttng_payload_view_from_payload(&payload, 0, -1); |
8ddd72ef JR |
1398 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
1399 | int fd_to_send; | |
1400 | ||
1401 | if (fd_count < 0) { | |
1402 | goto error; | |
1403 | } | |
1404 | ||
1405 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); | |
1406 | if (fd_count == 1) { | |
28ab034a | 1407 | struct fd_handle *h = lttng_payload_view_pop_fd_handle(&view); |
6e911cad | 1408 | |
8ddd72ef JR |
1409 | if (!h) { |
1410 | goto error; | |
1411 | } | |
1412 | ||
1413 | fd_to_send = fd_handle_get_fd(h); | |
1414 | fd_handle_put(h); | |
1415 | } | |
1416 | ||
1417 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
28ab034a JG |
1418 | fd_count ? &fd_to_send : NULL, |
1419 | fd_count, | |
1420 | view.buffer.size ? view.buffer.data : NULL, | |
1421 | view.buffer.size, | |
1422 | NULL, | |
1423 | NULL, | |
1424 | 0); | |
8ddd72ef JR |
1425 | } |
1426 | ||
1427 | error: | |
6e911cad MD |
1428 | if (filter_expression && ctx) { |
1429 | filter_bytecode_free(ctx); | |
1430 | filter_ir_free(ctx); | |
1431 | filter_parser_ctx_free(ctx); | |
1432 | } | |
6e911cad MD |
1433 | if (free_filter_expression) { |
1434 | /* | |
9ae110e2 JG |
1435 | * The filter expression has been replaced and must be freed as |
1436 | * it is not the original filter expression received as a | |
1437 | * parameter. | |
6e911cad MD |
1438 | */ |
1439 | free(filter_expression); | |
1440 | } | |
6e911cad | 1441 | /* |
9ae110e2 JG |
1442 | * Return directly to the caller and don't ask the sessiond since |
1443 | * something went wrong in the parsing of data above. | |
6e911cad | 1444 | */ |
8ddd72ef | 1445 | lttng_payload_reset(&payload); |
6e911cad MD |
1446 | return ret; |
1447 | } | |
1448 | ||
1449 | /* | |
9ae110e2 JG |
1450 | * Disable event(s) of a channel and domain. |
1451 | * If no event name is specified, all events are disabled. | |
1452 | * If no channel name is specified, the default 'channel0' is used. | |
1453 | * Returns size of returned session payload data or a negative error code. | |
6e911cad | 1454 | */ |
28ab034a | 1455 | int lttng_disable_event(struct lttng_handle *handle, const char *name, const char *channel_name) |
6e911cad | 1456 | { |
e1b624d0 | 1457 | int ret; |
6e911cad MD |
1458 | struct lttng_event ev; |
1459 | ||
1460 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1461 | ev.loglevel = -1; |
6e911cad | 1462 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1463 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1464 | if (ret) { | |
1465 | ret = -LTTNG_ERR_INVALID; | |
1466 | goto end; | |
1467 | } | |
1468 | ||
1469 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1470 | end: | |
1471 | return ret; | |
1df4dedd DG |
1472 | } |
1473 | ||
cf0bcb51 JG |
1474 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1475 | { | |
1476 | struct lttng_channel *channel = NULL; | |
cf0bcb51 JG |
1477 | |
1478 | if (!domain) { | |
999af9c1 | 1479 | goto end; |
cf0bcb51 JG |
1480 | } |
1481 | ||
1482 | /* Validate domain. */ | |
1483 | switch (domain->type) { | |
1484 | case LTTNG_DOMAIN_UST: | |
1485 | switch (domain->buf_type) { | |
1486 | case LTTNG_BUFFER_PER_UID: | |
1487 | case LTTNG_BUFFER_PER_PID: | |
1488 | break; | |
1489 | default: | |
999af9c1 | 1490 | goto end; |
cf0bcb51 JG |
1491 | } |
1492 | break; | |
1493 | case LTTNG_DOMAIN_KERNEL: | |
1494 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
999af9c1 | 1495 | goto end; |
cf0bcb51 JG |
1496 | } |
1497 | break; | |
1498 | default: | |
999af9c1 | 1499 | goto end; |
cf0bcb51 JG |
1500 | } |
1501 | ||
999af9c1 | 1502 | channel = lttng_channel_create_internal(); |
cf0bcb51 | 1503 | if (!channel) { |
999af9c1 | 1504 | goto end; |
cf0bcb51 JG |
1505 | } |
1506 | ||
cf0bcb51 | 1507 | lttng_channel_set_default_attr(domain, &channel->attr); |
999af9c1 | 1508 | end: |
cf0bcb51 | 1509 | return channel; |
cf0bcb51 JG |
1510 | } |
1511 | ||
1512 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1513 | { | |
1514 | if (!channel) { | |
1515 | return; | |
1516 | } | |
1517 | ||
1518 | if (channel->attr.extended.ptr) { | |
1519 | free(channel->attr.extended.ptr); | |
1520 | } | |
1521 | free(channel); | |
1522 | } | |
1523 | ||
1df4dedd | 1524 | /* |
9ae110e2 JG |
1525 | * Enable channel per domain |
1526 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1527 | */ |
28ab034a | 1528 | int lttng_enable_channel(struct lttng_handle *handle, struct lttng_channel *in_chan) |
a5c5a2bd | 1529 | { |
13dd7782 | 1530 | enum lttng_error_code ret_code; |
e1b624d0 | 1531 | int ret; |
999af9c1 | 1532 | struct lttng_dynamic_buffer buffer; |
cd80958d | 1533 | struct lttcomm_session_msg lsm; |
13dd7782 | 1534 | uint64_t total_buffer_size_needed_per_cpu = 0; |
999af9c1 JR |
1535 | struct lttng_channel *channel = NULL; |
1536 | ||
1537 | lttng_dynamic_buffer_init(&buffer); | |
cd80958d | 1538 | |
9ae110e2 | 1539 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1540 | if (handle == NULL || in_chan == NULL) { |
999af9c1 JR |
1541 | ret = -LTTNG_ERR_INVALID; |
1542 | goto end; | |
cf0bcb51 | 1543 | } |
cd80958d | 1544 | |
09b72f7a FD |
1545 | /* |
1546 | * Verify that the amount of memory required to create the requested | |
1547 | * buffer is available on the system at the moment. | |
1548 | */ | |
28ab034a | 1549 | if (in_chan->attr.num_subbuf > UINT64_MAX / in_chan->attr.subbuf_size) { |
13dd7782 JR |
1550 | /* Overflow */ |
1551 | ret = -LTTNG_ERR_OVERFLOW; | |
1552 | goto end; | |
1553 | } | |
1554 | ||
28ab034a JG |
1555 | total_buffer_size_needed_per_cpu = in_chan->attr.num_subbuf * in_chan->attr.subbuf_size; |
1556 | ret_code = check_enough_available_memory(total_buffer_size_needed_per_cpu); | |
13dd7782 JR |
1557 | if (ret_code != LTTNG_OK) { |
1558 | ret = -ret_code; | |
1559 | goto end; | |
09b72f7a FD |
1560 | } |
1561 | ||
999af9c1 JR |
1562 | /* Copy the channel for easier manipulation. */ |
1563 | channel = lttng_channel_copy(in_chan); | |
1564 | if (!channel) { | |
1565 | ret = -LTTNG_ERR_NOMEM; | |
1566 | goto end; | |
1567 | } | |
1568 | ||
1569 | /* Populate the channel extended attribute if necessary. */ | |
1570 | if (!channel->attr.extended.ptr) { | |
28ab034a | 1571 | struct lttng_channel_extended *extended = zmalloc<lttng_channel_extended>(); |
999af9c1 JR |
1572 | |
1573 | if (!extended) { | |
1574 | ret = -LTTNG_ERR_NOMEM; | |
1575 | goto end; | |
1576 | } | |
64803277 | 1577 | |
28ab034a | 1578 | lttng_channel_set_default_extended_attr(&handle->domain, extended); |
999af9c1 JR |
1579 | channel->attr.extended.ptr = extended; |
1580 | } | |
1581 | ||
1582 | /* Prepare the payload */ | |
1583 | memset(&lsm, 0, sizeof(lsm)); | |
1584 | ||
37a5ef39 | 1585 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_ENABLE_CHANNEL; |
60160d2a | 1586 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1587 | |
28ab034a | 1588 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
1589 | if (ret) { |
1590 | ret = -LTTNG_ERR_INVALID; | |
1591 | goto end; | |
1592 | } | |
cd80958d | 1593 | |
999af9c1 JR |
1594 | ret = lttng_channel_serialize(channel, &buffer); |
1595 | if (ret) { | |
1596 | ret = -LTTNG_ERR_FATAL; | |
1597 | goto end; | |
1598 | } | |
1599 | ||
1600 | lsm.u.channel.length = buffer.size; | |
1601 | ||
28ab034a | 1602 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, buffer.size, NULL); |
e1b624d0 | 1603 | end: |
999af9c1 JR |
1604 | lttng_channel_destroy(channel); |
1605 | lttng_dynamic_buffer_reset(&buffer); | |
e1b624d0 | 1606 | return ret; |
8c0faa1d | 1607 | } |
1df4dedd | 1608 | |
2ef84c95 | 1609 | /* |
9ae110e2 JG |
1610 | * All tracing will be stopped for registered events of the channel. |
1611 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1612 | */ |
cd80958d | 1613 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1614 | { |
e1b624d0 | 1615 | int ret; |
cd80958d DG |
1616 | struct lttcomm_session_msg lsm; |
1617 | ||
9ae110e2 | 1618 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1619 | if (handle == NULL || name == NULL) { |
2f70b271 | 1620 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1621 | } |
1622 | ||
441c16a7 MD |
1623 | memset(&lsm, 0, sizeof(lsm)); |
1624 | ||
37a5ef39 | 1625 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_DISABLE_CHANNEL; |
1df4dedd | 1626 | |
28ab034a | 1627 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1628 | if (ret) { |
1629 | ret = -LTTNG_ERR_INVALID; | |
1630 | goto end; | |
1631 | } | |
9d697d3d | 1632 | |
60160d2a | 1633 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1634 | |
28ab034a | 1635 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
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; | |
ca95a216 DG |
1644 | } |
1645 | ||
fac6795d | 1646 | /* |
9ae110e2 JG |
1647 | * Lists all available tracepoints of domain. |
1648 | * Sets the contents of the events array. | |
1649 | * Returns the number of lttng_event entries in events; | |
1650 | * on error, returns a negative value. | |
fac6795d | 1651 | */ |
28ab034a | 1652 | int lttng_list_tracepoints(struct lttng_handle *handle, struct lttng_event **events) |
fac6795d | 1653 | { |
28ab034a JG |
1654 | enum lttng_error_code ret_code; |
1655 | int ret, total_payload_received; | |
1656 | char *reception_buffer = NULL; | |
1657 | struct lttcomm_session_msg lsm = { | |
37a5ef39 | 1658 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINTS, |
1c9a0b0e MJ |
1659 | .session = {}, |
1660 | .domain = {}, | |
1661 | .u = {}, | |
1662 | .fd_count = 0, | |
1663 | }; | |
28ab034a JG |
1664 | struct lttcomm_list_command_header *cmd_header = NULL; |
1665 | size_t cmd_header_len; | |
1666 | unsigned int nb_events = 0; | |
8ddd72ef | 1667 | |
28ab034a JG |
1668 | if (handle == NULL) { |
1669 | ret = -LTTNG_ERR_INVALID; | |
1670 | goto end; | |
1671 | } | |
8ddd72ef | 1672 | |
28ab034a | 1673 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
8ddd72ef | 1674 | |
28ab034a JG |
1675 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1676 | NULL, | |
1677 | 0, | |
1678 | NULL, | |
1679 | 0, | |
1680 | (void **) &reception_buffer, | |
1681 | (void **) &cmd_header, | |
1682 | &cmd_header_len); | |
1683 | if (ret < 0) { | |
1684 | goto end; | |
1685 | } | |
8ddd72ef | 1686 | |
28ab034a | 1687 | total_payload_received = ret; |
8ddd72ef | 1688 | |
28ab034a JG |
1689 | if (!cmd_header) { |
1690 | ret = -LTTNG_ERR_UNK; | |
1691 | goto end; | |
1692 | } | |
8ddd72ef | 1693 | |
28ab034a JG |
1694 | if (cmd_header->count > INT_MAX) { |
1695 | ret = -LTTNG_ERR_OVERFLOW; | |
1696 | goto end; | |
1697 | } | |
8ddd72ef | 1698 | |
28ab034a | 1699 | nb_events = (unsigned int) cmd_header->count; |
fac6795d | 1700 | |
8ddd72ef JR |
1701 | { |
1702 | struct lttng_buffer_view events_view = | |
28ab034a | 1703 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); |
8ddd72ef | 1704 | struct lttng_payload_view events_payload_view = |
28ab034a | 1705 | lttng_payload_view_from_buffer_view(&events_view, 0, -1); |
2a71efd5 | 1706 | |
8ddd72ef | 1707 | ret_code = lttng_events_create_and_flatten_from_payload( |
28ab034a | 1708 | &events_payload_view, nb_events, events); |
8ddd72ef JR |
1709 | if (ret_code != LTTNG_OK) { |
1710 | ret = -ret_code; | |
1711 | goto end; | |
1712 | } | |
eb354453 | 1713 | } |
fac6795d | 1714 | |
8ddd72ef JR |
1715 | ret = (int) nb_events; |
1716 | ||
1717 | end: | |
28ab034a JG |
1718 | free(cmd_header); |
1719 | free(reception_buffer); | |
1720 | return ret; | |
fac6795d DG |
1721 | } |
1722 | ||
f37d259d | 1723 | /* |
9ae110e2 JG |
1724 | * Lists all available tracepoint fields of domain. |
1725 | * Sets the contents of the event field array. | |
1726 | * Returns the number of lttng_event_field entries in events; | |
1727 | * on error, returns a negative value. | |
f37d259d | 1728 | */ |
28ab034a | 1729 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, struct lttng_event_field **fields) |
f37d259d | 1730 | { |
b2d68839 | 1731 | enum lttng_error_code ret_code; |
f37d259d MD |
1732 | int ret; |
1733 | struct lttcomm_session_msg lsm; | |
b2d68839 JR |
1734 | const struct lttcomm_list_command_header *cmd_header = NULL; |
1735 | unsigned int nb_event_fields = 0; | |
1736 | struct lttng_payload reply; | |
f37d259d | 1737 | |
5c5c6942 JG |
1738 | lttng_payload_init(&reply); |
1739 | ||
f37d259d | 1740 | if (handle == NULL) { |
b2d68839 JR |
1741 | ret = -LTTNG_ERR_INVALID; |
1742 | goto end; | |
f37d259d MD |
1743 | } |
1744 | ||
53efb85a | 1745 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 1746 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1747 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1748 | |
b2d68839 JR |
1749 | { |
1750 | lttng_payload_view message_view = | |
28ab034a | 1751 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
b2d68839 JR |
1752 | |
1753 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
1754 | if (ret < 0) { | |
1755 | goto end; | |
1756 | } | |
1757 | } | |
1758 | ||
1759 | { | |
28ab034a JG |
1760 | const lttng_buffer_view cmd_header_view = lttng_buffer_view_from_dynamic_buffer( |
1761 | &reply.buffer, 0, sizeof(*cmd_header)); | |
b2d68839 JR |
1762 | |
1763 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { | |
1764 | ret = -LTTNG_ERR_INVALID_PROTOCOL; | |
1765 | goto end; | |
1766 | } | |
1767 | ||
28ab034a | 1768 | cmd_header = (struct lttcomm_list_command_header *) cmd_header_view.data; |
b2d68839 JR |
1769 | } |
1770 | ||
1771 | if (cmd_header->count > INT_MAX) { | |
1772 | ret = -LTTNG_ERR_OVERFLOW; | |
1773 | goto end; | |
f37d259d MD |
1774 | } |
1775 | ||
b2d68839 JR |
1776 | nb_event_fields = cmd_header->count; |
1777 | ||
1778 | { | |
1779 | lttng_payload_view reply_view = | |
28ab034a | 1780 | lttng_payload_view_from_payload(&reply, sizeof(*cmd_header), -1); |
b2d68839 JR |
1781 | |
1782 | ret_code = lttng_event_fields_create_and_flatten_from_payload( | |
28ab034a | 1783 | &reply_view, nb_event_fields, fields); |
b2d68839 JR |
1784 | if (ret_code != LTTNG_OK) { |
1785 | ret = -ret_code; | |
1786 | goto end; | |
1787 | } | |
1788 | } | |
1789 | ||
1790 | ret = nb_event_fields; | |
1791 | ||
1792 | end: | |
5c5c6942 | 1793 | lttng_payload_reset(&reply); |
b2d68839 | 1794 | return ret; |
f37d259d MD |
1795 | } |
1796 | ||
834978fd | 1797 | /* |
9ae110e2 JG |
1798 | * Lists all available kernel system calls. Allocates and sets the contents of |
1799 | * the events array. | |
834978fd | 1800 | * |
9ae110e2 JG |
1801 | * Returns the number of lttng_event entries in events; on error, returns a |
1802 | * negative value. | |
834978fd DG |
1803 | */ |
1804 | int lttng_list_syscalls(struct lttng_event **events) | |
1805 | { | |
28ab034a JG |
1806 | enum lttng_error_code ret_code; |
1807 | int ret, total_payload_received; | |
1808 | char *reception_buffer = NULL; | |
1809 | struct lttcomm_session_msg lsm = {}; | |
1810 | struct lttcomm_list_command_header *cmd_header = NULL; | |
1811 | size_t cmd_header_len; | |
1812 | uint32_t nb_events = 0; | |
1813 | ||
1814 | if (!events) { | |
1815 | ret = -LTTNG_ERR_INVALID; | |
1816 | goto end; | |
1817 | } | |
1818 | ||
1819 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_SYSCALLS; | |
1820 | /* Force kernel domain for system calls. */ | |
1821 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1822 | ||
1823 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1824 | NULL, | |
1825 | 0, | |
1826 | NULL, | |
1827 | 0, | |
1828 | (void **) &reception_buffer, | |
1829 | (void **) &cmd_header, | |
1830 | &cmd_header_len); | |
1831 | if (ret < 0) { | |
1832 | goto end; | |
1833 | } | |
1834 | total_payload_received = ret; | |
1835 | ||
1836 | if (!cmd_header) { | |
1837 | ret = -LTTNG_ERR_UNK; | |
1838 | goto end; | |
1839 | } | |
1840 | ||
1841 | if (cmd_header->count > INT_MAX) { | |
1842 | ret = -LTTNG_ERR_OVERFLOW; | |
1843 | goto end; | |
1844 | } | |
1845 | ||
1846 | nb_events = (unsigned int) cmd_header->count; | |
1847 | ||
1848 | { | |
1849 | const struct lttng_buffer_view events_view = | |
1850 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); | |
8ddd72ef | 1851 | struct lttng_payload_view events_payload_view = |
28ab034a | 1852 | lttng_payload_view_from_buffer_view(&events_view, 0, -1); |
8ddd72ef | 1853 | |
28ab034a JG |
1854 | ret_code = lttng_events_create_and_flatten_from_payload( |
1855 | &events_payload_view, nb_events, events); | |
1856 | if (ret_code != LTTNG_OK) { | |
1857 | ret = -ret_code; | |
1858 | goto end; | |
1859 | } | |
1860 | } | |
8ddd72ef | 1861 | |
28ab034a | 1862 | ret = (int) nb_events; |
834978fd | 1863 | |
8ddd72ef | 1864 | end: |
28ab034a JG |
1865 | free(reception_buffer); |
1866 | free(cmd_header); | |
1867 | return ret; | |
834978fd DG |
1868 | } |
1869 | ||
1657e9bb | 1870 | /* |
9ae110e2 | 1871 | * Returns a human readable string describing |
8346beb6 | 1872 | * the error code (positive or negative value). |
1657e9bb | 1873 | */ |
9a745bc7 | 1874 | const char *lttng_strerror(int code) |
1657e9bb | 1875 | { |
8346beb6 PP |
1876 | if (code > 0) { |
1877 | code = -code; | |
1878 | } | |
1879 | ||
f73fabfd | 1880 | return error_get_str(code); |
1657e9bb DG |
1881 | } |
1882 | ||
28ab034a | 1883 | enum lttng_error_code lttng_create_session_ext(struct lttng_session_descriptor *session_descriptor) |
b178f53e JG |
1884 | { |
1885 | enum lttng_error_code ret_code; | |
1886 | struct lttcomm_session_msg lsm = { | |
37a5ef39 | 1887 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_CREATE_SESSION_EXT, |
1c9a0b0e MJ |
1888 | .session = {}, |
1889 | .domain = {}, | |
1890 | .u = {}, | |
1891 | .fd_count = 0, | |
b178f53e JG |
1892 | }; |
1893 | void *reply = NULL; | |
1894 | struct lttng_buffer_view reply_view; | |
1895 | int reply_ret; | |
1896 | bool sessiond_must_generate_ouput; | |
1897 | struct lttng_dynamic_buffer payload; | |
1898 | int ret; | |
1899 | size_t descriptor_size; | |
1900 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1901 | ||
1902 | lttng_dynamic_buffer_init(&payload); | |
1903 | if (!session_descriptor) { | |
1904 | ret_code = LTTNG_ERR_INVALID; | |
1905 | goto end; | |
1906 | } | |
1907 | ||
1908 | sessiond_must_generate_ouput = | |
28ab034a | 1909 | !lttng_session_descriptor_is_output_destination_initialized(session_descriptor); |
b178f53e JG |
1910 | if (sessiond_must_generate_ouput) { |
1911 | const char *home_dir = utils_get_home_dir(); | |
1912 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1913 | ||
1914 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1915 | ret_code = LTTNG_ERR_FATAL; | |
1916 | goto end; | |
1917 | } | |
1918 | ||
1919 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
28ab034a | 1920 | ret = lttng_dynamic_buffer_append(&payload, home_dir, home_dir_len); |
b178f53e JG |
1921 | if (ret) { |
1922 | ret_code = LTTNG_ERR_NOMEM; | |
1923 | goto end; | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | descriptor_size = payload.size; | |
28ab034a | 1928 | ret = lttng_session_descriptor_serialize(session_descriptor, &payload); |
b178f53e JG |
1929 | if (ret) { |
1930 | ret_code = LTTNG_ERR_INVALID; | |
1931 | goto end; | |
1932 | } | |
1933 | descriptor_size = payload.size - descriptor_size; | |
1934 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1935 | ||
1936 | /* Command returns a session descriptor on success. */ | |
28ab034a JG |
1937 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( |
1938 | &lsm, payload.data, payload.size, &reply); | |
b178f53e | 1939 | if (reply_ret < 0) { |
4bd69c5f | 1940 | ret_code = (lttng_error_code) -reply_ret; |
b178f53e JG |
1941 | goto end; |
1942 | } else if (reply_ret == 0) { | |
1943 | /* Socket unexpectedly closed by the session daemon. */ | |
1944 | ret_code = LTTNG_ERR_FATAL; | |
1945 | goto end; | |
1946 | } | |
1947 | ||
4bd69c5f | 1948 | reply_view = lttng_buffer_view_init((const char *) reply, 0, reply_ret); |
28ab034a | 1949 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, &descriptor_reply); |
b178f53e JG |
1950 | if (ret < 0) { |
1951 | ret_code = LTTNG_ERR_FATAL; | |
1952 | goto end; | |
1953 | } | |
1954 | ret_code = LTTNG_OK; | |
1955 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1956 | end: | |
1957 | free(reply); | |
1958 | lttng_dynamic_buffer_reset(&payload); | |
1959 | lttng_session_descriptor_destroy(descriptor_reply); | |
1960 | return ret_code; | |
1961 | } | |
1962 | ||
aaf97519 | 1963 | /* |
b178f53e | 1964 | * Create a new session using name and url for destination. |
a4b92340 | 1965 | * |
780d4bb8 | 1966 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1967 | */ |
a4b92340 | 1968 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1969 | { |
3dd05a85 | 1970 | int ret; |
a4b92340 | 1971 | ssize_t size; |
a4b92340 | 1972 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1973 | struct lttng_session_descriptor *descriptor = NULL; |
1974 | enum lttng_error_code ret_code; | |
00e2e675 | 1975 | |
b178f53e JG |
1976 | if (!name) { |
1977 | ret = -LTTNG_ERR_INVALID; | |
1978 | goto end; | |
00e2e675 DG |
1979 | } |
1980 | ||
bc894455 | 1981 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1982 | if (size < 0) { |
b178f53e JG |
1983 | ret = -LTTNG_ERR_INVALID; |
1984 | goto end; | |
1985 | } | |
1986 | switch (size) { | |
1987 | case 0: | |
1988 | descriptor = lttng_session_descriptor_create(name); | |
1989 | break; | |
1990 | case 1: | |
1991 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1992 | ret = -LTTNG_ERR_INVALID; | |
1993 | goto end; | |
1994 | } | |
28ab034a | 1995 | descriptor = lttng_session_descriptor_local_create(name, uris[0].dst.path); |
b178f53e JG |
1996 | break; |
1997 | case 2: | |
28ab034a | 1998 | descriptor = lttng_session_descriptor_network_create(name, url, NULL); |
b178f53e JG |
1999 | break; |
2000 | default: | |
2001 | ret = -LTTNG_ERR_INVALID; | |
2002 | goto end; | |
2003 | } | |
2004 | if (!descriptor) { | |
2005 | ret = -LTTNG_ERR_INVALID; | |
2006 | goto end; | |
00e2e675 | 2007 | } |
b178f53e JG |
2008 | ret_code = lttng_create_session_ext(descriptor); |
2009 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2010 | end: | |
2011 | lttng_session_descriptor_destroy(descriptor); | |
2012 | free(uris); | |
2013 | return ret; | |
2014 | } | |
00e2e675 | 2015 | |
b178f53e JG |
2016 | /* |
2017 | * Create a session exclusively used for snapshot. | |
2018 | * | |
780d4bb8 | 2019 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2020 | */ |
2021 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2022 | { | |
2023 | int ret; | |
2024 | enum lttng_error_code ret_code; | |
2025 | ssize_t size; | |
2026 | struct lttng_uri *uris = NULL; | |
2027 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 2028 | |
b178f53e JG |
2029 | if (!name) { |
2030 | ret = -LTTNG_ERR_INVALID; | |
2031 | goto end; | |
2032 | } | |
2033 | ||
2034 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2035 | if (size < 0) { | |
2036 | ret = -LTTNG_ERR_INVALID; | |
2037 | goto end; | |
2038 | } | |
2039 | /* | |
2040 | * If the user does not specify a custom subdir, use the session name. | |
2041 | */ | |
28ab034a JG |
2042 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
2043 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
b178f53e JG |
2044 | if (ret < 0) { |
2045 | PERROR("Failed to set session name as network destination sub-directory"); | |
2046 | ret = -LTTNG_ERR_FATAL; | |
2047 | goto end; | |
2048 | } else if (ret >= sizeof(uris[0].subdir)) { | |
2049 | /* Truncated output. */ | |
2050 | ret = -LTTNG_ERR_INVALID; | |
2051 | goto end; | |
2052 | } | |
2053 | } | |
3dd05a85 | 2054 | |
b178f53e JG |
2055 | switch (size) { |
2056 | case 0: | |
2057 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
2058 | break; | |
2059 | case 1: | |
2060 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
2061 | ret = -LTTNG_ERR_INVALID; | |
2062 | goto end; | |
2063 | } | |
28ab034a | 2064 | descriptor = lttng_session_descriptor_snapshot_local_create(name, uris[0].dst.path); |
b178f53e JG |
2065 | break; |
2066 | case 2: | |
28ab034a JG |
2067 | descriptor = |
2068 | lttng_session_descriptor_snapshot_network_create(name, snapshot_url, NULL); | |
b178f53e JG |
2069 | break; |
2070 | default: | |
2071 | ret = -LTTNG_ERR_INVALID; | |
2072 | goto end; | |
2073 | } | |
2074 | if (!descriptor) { | |
2075 | ret = -LTTNG_ERR_INVALID; | |
2076 | goto end; | |
2077 | } | |
2078 | ret_code = lttng_create_session_ext(descriptor); | |
2079 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2080 | end: | |
2081 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
2082 | free(uris); |
2083 | return ret; | |
00e2e675 DG |
2084 | } |
2085 | ||
b178f53e JG |
2086 | /* |
2087 | * Create a session exclusively used for live. | |
2088 | * | |
780d4bb8 | 2089 | * Return 0 on success else a negative LTTng error code. |
b178f53e | 2090 | */ |
28ab034a | 2091 | int lttng_create_session_live(const char *name, const char *url, unsigned int timer_interval) |
b178f53e JG |
2092 | { |
2093 | int ret; | |
2094 | enum lttng_error_code ret_code; | |
2095 | struct lttng_session_descriptor *descriptor = NULL; | |
2096 | ||
2097 | if (!name) { | |
2098 | ret = -LTTNG_ERR_INVALID; | |
2099 | goto end; | |
2100 | } | |
2101 | ||
2102 | if (url) { | |
2103 | descriptor = lttng_session_descriptor_live_network_create( | |
28ab034a | 2104 | name, url, NULL, timer_interval); |
b178f53e | 2105 | } else { |
28ab034a | 2106 | descriptor = lttng_session_descriptor_live_create(name, timer_interval); |
b178f53e JG |
2107 | } |
2108 | if (!descriptor) { | |
2109 | ret = -LTTNG_ERR_INVALID; | |
2110 | goto end; | |
2111 | } | |
2112 | ret_code = lttng_create_session_ext(descriptor); | |
2113 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2114 | end: | |
2115 | lttng_session_descriptor_destroy(descriptor); | |
2116 | return ret; | |
2117 | } | |
2118 | ||
e20ee7c2 JD |
2119 | /* |
2120 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2121 | * |
2122 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2123 | */ |
2124 | int lttng_destroy_session(const char *session_name) | |
2125 | { | |
2126 | int ret; | |
3e3665b8 JG |
2127 | enum lttng_error_code ret_code; |
2128 | enum lttng_destruction_handle_status status; | |
2129 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2130 | |
2131 | /* | |
3e3665b8 JG |
2132 | * Stop the tracing and wait for the data to be |
2133 | * consumed. | |
e20ee7c2 JD |
2134 | */ |
2135 | ret = _lttng_stop_tracing(session_name, 1); | |
2136 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2137 | goto end; | |
2138 | } | |
2139 | ||
3e3665b8 JG |
2140 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2141 | if (ret_code != LTTNG_OK) { | |
2142 | ret = (int) -ret_code; | |
2143 | goto end; | |
2144 | } | |
a0377dfe | 2145 | LTTNG_ASSERT(handle); |
3e3665b8 JG |
2146 | |
2147 | /* Block until the completion of the destruction of the session. */ | |
2148 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2149 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2150 | ret = -LTTNG_ERR_UNK; | |
2151 | goto end; | |
2152 | } | |
2153 | ||
2154 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2155 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2156 | ret = -LTTNG_ERR_UNK; | |
2157 | goto end; | |
2158 | } | |
780d4bb8 | 2159 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2160 | end: |
3e3665b8 | 2161 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2162 | return ret; |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | * Destroy the session without waiting for the data. | |
2167 | */ | |
2168 | int lttng_destroy_session_no_wait(const char *session_name) | |
2169 | { | |
3e3665b8 | 2170 | enum lttng_error_code ret_code; |
e20ee7c2 | 2171 | |
3e3665b8 | 2172 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
3204017e | 2173 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2174 | } |
2175 | ||
57167058 | 2176 | /* |
9ae110e2 JG |
2177 | * Ask the session daemon for all available sessions. |
2178 | * Sets the contents of the sessions array. | |
2179 | * Returns the number of lttng_session entries in sessions; | |
2180 | * on error, returns a negative value. | |
57167058 | 2181 | */ |
b178f53e | 2182 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2183 | { |
ca95a216 | 2184 | int ret; |
cd80958d | 2185 | struct lttcomm_session_msg lsm; |
28ab034a JG |
2186 | const size_t session_size = |
2187 | sizeof(struct lttng_session) + sizeof(struct lttng_session_extended); | |
b178f53e JG |
2188 | size_t session_count, i; |
2189 | struct lttng_session_extended *sessions_extended_begin; | |
2190 | struct lttng_session *sessions = NULL; | |
57167058 | 2191 | |
53efb85a | 2192 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2193 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_SESSIONS; |
985aea18 MD |
2194 | /* |
2195 | * Initialize out_sessions to NULL so it is initialized when | |
2196 | * lttng_list_sessions returns 0, thus allowing *out_sessions to | |
2197 | * be subsequently freed. | |
2198 | */ | |
2199 | *out_sessions = NULL; | |
28ab034a | 2200 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &sessions); |
b178f53e | 2201 | if (ret <= 0) { |
b178f53e JG |
2202 | goto end; |
2203 | } | |
2204 | if (!sessions) { | |
2205 | ret = -LTTNG_ERR_FATAL; | |
2206 | goto end; | |
2207 | } | |
2208 | ||
2209 | if (ret % session_size) { | |
2210 | ret = -LTTNG_ERR_UNK; | |
2211 | free(sessions); | |
b178f53e | 2212 | goto end; |
57167058 | 2213 | } |
b178f53e | 2214 | session_count = (size_t) ret / session_size; |
28ab034a | 2215 | sessions_extended_begin = (struct lttng_session_extended *) (&sessions[session_count]); |
57167058 | 2216 | |
b178f53e JG |
2217 | /* Set extended session info pointers. */ |
2218 | for (i = 0; i < session_count; i++) { | |
2219 | struct lttng_session *session = &sessions[i]; | |
28ab034a | 2220 | struct lttng_session_extended *extended = &(sessions_extended_begin[i]); |
b178f53e JG |
2221 | |
2222 | session->extended.ptr = extended; | |
2223 | } | |
2224 | ||
2225 | ret = (int) session_count; | |
2226 | *out_sessions = sessions; | |
2227 | end: | |
2228 | return ret; | |
2229 | } | |
2230 | ||
28ab034a JG |
2231 | enum lttng_error_code lttng_session_get_creation_time(const struct lttng_session *session, |
2232 | uint64_t *creation_time) | |
b178f53e JG |
2233 | { |
2234 | enum lttng_error_code ret = LTTNG_OK; | |
2235 | struct lttng_session_extended *extended; | |
2236 | ||
2237 | if (!session || !creation_time || !session->extended.ptr) { | |
2238 | ret = LTTNG_ERR_INVALID; | |
2239 | goto end; | |
2240 | } | |
2241 | ||
4bd69c5f | 2242 | extended = (lttng_session_extended *) session->extended.ptr; |
b178f53e JG |
2243 | if (!extended->creation_time.is_set) { |
2244 | /* Not created on the session daemon yet. */ | |
2245 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2246 | goto end; | |
2247 | } | |
2248 | *creation_time = extended->creation_time.value; | |
2249 | end: | |
2250 | return ret; | |
57167058 DG |
2251 | } |
2252 | ||
28ab034a | 2253 | int lttng_set_session_shm_path(const char *session_name, const char *shm_path) |
d7ba1388 | 2254 | { |
e1b624d0 | 2255 | int ret; |
d7ba1388 MD |
2256 | struct lttcomm_session_msg lsm; |
2257 | ||
2258 | if (session_name == NULL) { | |
2259 | return -LTTNG_ERR_INVALID; | |
2260 | } | |
2261 | ||
2262 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2263 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_SET_SESSION_SHM_PATH; |
d7ba1388 | 2264 | |
28ab034a | 2265 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2266 | if (ret) { |
2267 | ret = -LTTNG_ERR_INVALID; | |
2268 | goto end; | |
2269 | } | |
2270 | ||
28ab034a JG |
2271 | ret = lttng_strncpy( |
2272 | lsm.u.set_shm_path.shm_path, shm_path ?: "", sizeof(lsm.u.set_shm_path.shm_path)); | |
e1b624d0 JG |
2273 | if (ret) { |
2274 | ret = -LTTNG_ERR_INVALID; | |
2275 | goto end; | |
2276 | } | |
d7ba1388 | 2277 | |
e1b624d0 JG |
2278 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2279 | end: | |
2280 | return ret; | |
d7ba1388 MD |
2281 | } |
2282 | ||
9f19cc17 | 2283 | /* |
9ae110e2 JG |
2284 | * Ask the session daemon for all available domains of a session. |
2285 | * Sets the contents of the domains array. | |
2286 | * Returns the number of lttng_domain entries in domains; | |
2287 | * on error, returns a negative value. | |
9f19cc17 | 2288 | */ |
28ab034a | 2289 | int lttng_list_domains(const char *session_name, struct lttng_domain **domains) |
9f19cc17 DG |
2290 | { |
2291 | int ret; | |
cd80958d DG |
2292 | struct lttcomm_session_msg lsm; |
2293 | ||
330be774 | 2294 | if (session_name == NULL) { |
e1b624d0 JG |
2295 | ret = -LTTNG_ERR_INVALID; |
2296 | goto error; | |
cd80958d | 2297 | } |
9f19cc17 | 2298 | |
53efb85a | 2299 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2300 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_DOMAINS; |
cd80958d | 2301 | |
28ab034a | 2302 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2303 | if (ret) { |
2304 | ret = -LTTNG_ERR_INVALID; | |
2305 | goto error; | |
2306 | } | |
cd80958d | 2307 | |
28ab034a | 2308 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) domains); |
9f19cc17 | 2309 | if (ret < 0) { |
e1b624d0 | 2310 | goto error; |
9f19cc17 DG |
2311 | } |
2312 | ||
2313 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2314 | error: |
2315 | return ret; | |
9f19cc17 DG |
2316 | } |
2317 | ||
2318 | /* | |
9ae110e2 JG |
2319 | * Ask the session daemon for all available channels of a session. |
2320 | * Sets the contents of the channels array. | |
2321 | * Returns the number of lttng_channel entries in channels; | |
2322 | * on error, returns a negative value. | |
9f19cc17 | 2323 | */ |
28ab034a | 2324 | int lttng_list_channels(struct lttng_handle *handle, struct lttng_channel **channels) |
9f19cc17 | 2325 | { |
999af9c1 | 2326 | int ret, total_payload_received; |
cd80958d | 2327 | struct lttcomm_session_msg lsm; |
999af9c1 JR |
2328 | char *reception_buffer = NULL; |
2329 | size_t cmd_header_len = 0; | |
2330 | struct lttcomm_list_command_header *cmd_header = NULL; | |
2331 | struct lttng_dynamic_buffer tmp_buffer; | |
2332 | ||
2333 | lttng_dynamic_buffer_init(&tmp_buffer); | |
cd80958d | 2334 | |
9d697d3d | 2335 | if (handle == NULL) { |
53e367f9 JG |
2336 | ret = -LTTNG_ERR_INVALID; |
2337 | goto end; | |
cd80958d DG |
2338 | } |
2339 | ||
53efb85a | 2340 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2341 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_CHANNELS; |
28ab034a | 2342 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2343 | if (ret) { |
2344 | ret = -LTTNG_ERR_INVALID; | |
2345 | goto end; | |
2346 | } | |
9f19cc17 | 2347 | |
60160d2a | 2348 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2349 | |
28ab034a JG |
2350 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
2351 | NULL, | |
2352 | 0, | |
2353 | NULL, | |
2354 | 0, | |
2355 | (void **) &reception_buffer, | |
2356 | (void **) &cmd_header, | |
2357 | &cmd_header_len); | |
9f19cc17 | 2358 | if (ret < 0) { |
53e367f9 JG |
2359 | goto end; |
2360 | } | |
2361 | ||
999af9c1 JR |
2362 | total_payload_received = ret; |
2363 | ||
2364 | if (cmd_header_len != sizeof(*cmd_header)) { | |
2365 | ret = -LTTNG_ERR_FATAL; | |
53e367f9 | 2366 | goto end; |
9f19cc17 DG |
2367 | } |
2368 | ||
999af9c1 JR |
2369 | if (!cmd_header) { |
2370 | ret = LTTNG_ERR_UNK; | |
2371 | goto end; | |
2372 | } | |
2373 | ||
2374 | if (cmd_header->count > INT_MAX) { | |
2375 | ret = -LTTNG_ERR_OVERFLOW; | |
2376 | goto end; | |
2377 | } | |
53e367f9 | 2378 | |
999af9c1 JR |
2379 | { |
2380 | enum lttng_error_code ret_code; | |
2381 | const struct lttng_buffer_view events_view = | |
28ab034a | 2382 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); |
999af9c1 JR |
2383 | |
2384 | ret_code = lttng_channels_create_and_flatten_from_buffer( | |
28ab034a | 2385 | &events_view, cmd_header->count, channels); |
999af9c1 JR |
2386 | if (ret_code != LTTNG_OK) { |
2387 | ret = -ret_code; | |
2388 | goto end; | |
2389 | } | |
53e367f9 JG |
2390 | } |
2391 | ||
999af9c1 | 2392 | ret = (int) cmd_header->count; |
53e367f9 | 2393 | end: |
999af9c1 JR |
2394 | free(cmd_header); |
2395 | free(reception_buffer); | |
53e367f9 | 2396 | return ret; |
9f19cc17 DG |
2397 | } |
2398 | ||
2399 | /* | |
9ae110e2 JG |
2400 | * Ask the session daemon for all available events of a session channel. |
2401 | * Sets the contents of the events array. | |
2402 | * Returns the number of lttng_event entries in events; | |
2403 | * on error, returns a negative value. | |
9f19cc17 | 2404 | */ |
cd80958d | 2405 | int lttng_list_events(struct lttng_handle *handle, |
28ab034a JG |
2406 | const char *channel_name, |
2407 | struct lttng_event **events) | |
9f19cc17 DG |
2408 | { |
2409 | int ret; | |
e368fb43 | 2410 | struct lttcomm_session_msg lsm = {}; |
8ddd72ef | 2411 | struct lttng_payload reply; |
e368fb43 | 2412 | struct lttng_payload_view lsm_view = |
28ab034a | 2413 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
8ddd72ef | 2414 | unsigned int nb_events = 0; |
9f19cc17 | 2415 | |
821a8b53 JR |
2416 | lttng_payload_init(&reply); |
2417 | ||
8ddd72ef | 2418 | /* Safety check. An handle and channel name are mandatory. */ |
9d697d3d | 2419 | if (handle == NULL || channel_name == NULL) { |
e368fb43 JG |
2420 | ret = -LTTNG_ERR_INVALID; |
2421 | goto end; | |
cd80958d DG |
2422 | } |
2423 | ||
8ddd72ef | 2424 | /* Initialize command parameters. */ |
37a5ef39 | 2425 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_EVENTS; |
28ab034a | 2426 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2427 | if (ret) { |
2428 | ret = -LTTNG_ERR_INVALID; | |
2429 | goto end; | |
2430 | } | |
2431 | ||
28ab034a | 2432 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2433 | if (ret) { |
2434 | ret = -LTTNG_ERR_INVALID; | |
2435 | goto end; | |
2436 | } | |
2437 | ||
60160d2a | 2438 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2439 | |
8ddd72ef JR |
2440 | /* Execute command against the session daemon. */ |
2441 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
9f19cc17 | 2442 | if (ret < 0) { |
de453daa | 2443 | goto end; |
9f19cc17 DG |
2444 | } |
2445 | ||
e368fb43 | 2446 | { |
28ab034a | 2447 | const struct lttcomm_list_command_header *cmd_reply_header = NULL; |
8ddd72ef | 2448 | const lttng_payload_view cmd_reply_header_view = |
28ab034a | 2449 | lttng_payload_view_from_payload(&reply, 0, sizeof(*cmd_reply_header)); |
8ddd72ef JR |
2450 | |
2451 | if (!lttng_payload_view_is_valid(&cmd_reply_header_view)) { | |
2452 | ret = -LTTNG_ERR_INVALID_PROTOCOL; | |
2453 | goto end; | |
56f0bc67 | 2454 | } |
b4e3ceb9 | 2455 | |
8ddd72ef | 2456 | cmd_reply_header = (const struct lttcomm_list_command_header *) |
28ab034a | 2457 | cmd_reply_header_view.buffer.data; |
8ddd72ef JR |
2458 | if (cmd_reply_header->count > INT_MAX) { |
2459 | ret = -LTTNG_ERR_OVERFLOW; | |
2460 | goto end; | |
2461 | } | |
56f0bc67 | 2462 | |
8ddd72ef | 2463 | nb_events = (unsigned int) cmd_reply_header->count; |
56f0bc67 | 2464 | } |
de453daa | 2465 | |
e368fb43 | 2466 | { |
8ddd72ef JR |
2467 | enum lttng_error_code ret_code; |
2468 | lttng_payload_view cmd_reply_payload = lttng_payload_view_from_payload( | |
28ab034a | 2469 | &reply, sizeof(struct lttcomm_list_command_header), -1); |
56f0bc67 | 2470 | |
8ddd72ef | 2471 | ret_code = lttng_events_create_and_flatten_from_payload( |
28ab034a | 2472 | &cmd_reply_payload, nb_events, events); |
8ddd72ef JR |
2473 | if (ret_code != LTTNG_OK) { |
2474 | ret = -((int) ret_code); | |
2475 | goto end; | |
56f0bc67 | 2476 | } |
de453daa JG |
2477 | } |
2478 | ||
de453daa JG |
2479 | ret = (int) nb_events; |
2480 | end: | |
8ddd72ef | 2481 | lttng_payload_reset(&reply); |
b4e3ceb9 | 2482 | return ret; |
9f19cc17 DG |
2483 | } |
2484 | ||
fac6795d | 2485 | /* |
1c8d13c8 TD |
2486 | * Sets the tracing_group variable with name. |
2487 | * This function allocates memory pointed to by tracing_group. | |
2488 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2489 | */ |
2490 | int lttng_set_tracing_group(const char *name) | |
2491 | { | |
e32a3d0f | 2492 | int ret = 0; |
76da29b6 | 2493 | char *new_group; |
e32a3d0f | 2494 | |
9d697d3d | 2495 | if (name == NULL) { |
e32a3d0f JG |
2496 | ret = -LTTNG_ERR_INVALID; |
2497 | goto end; | |
9d697d3d DG |
2498 | } |
2499 | ||
e32a3d0f JG |
2500 | new_group = strdup(name); |
2501 | if (!new_group) { | |
2502 | ret = -LTTNG_ERR_FATAL; | |
2503 | goto end; | |
fac6795d DG |
2504 | } |
2505 | ||
76da29b6 JR |
2506 | free(tracing_group); |
2507 | tracing_group = new_group; | |
2508 | new_group = NULL; | |
2509 | ||
e32a3d0f JG |
2510 | end: |
2511 | return ret; | |
fac6795d DG |
2512 | } |
2513 | ||
f46376a1 | 2514 | int lttng_calibrate(struct lttng_handle *handle __attribute__((unused)), |
28ab034a | 2515 | struct lttng_calibrate *calibrate __attribute__((unused))) |
d0254c7c | 2516 | { |
b812e5ca PP |
2517 | /* |
2518 | * This command was removed in LTTng 2.9. | |
2519 | */ | |
2520 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2521 | } |
2522 | ||
5edd7e09 DG |
2523 | /* |
2524 | * Set default channel attributes. | |
441c16a7 | 2525 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 | 2526 | */ |
28ab034a | 2527 | void lttng_channel_set_default_attr(struct lttng_domain *domain, struct lttng_channel_attr *attr) |
5edd7e09 | 2528 | { |
294851b0 | 2529 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2530 | |
5edd7e09 DG |
2531 | /* Safety check */ |
2532 | if (attr == NULL || domain == NULL) { | |
2533 | return; | |
2534 | } | |
2535 | ||
999af9c1 | 2536 | /* Save the pointer for later use */ |
294851b0 | 2537 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2538 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2539 | ||
0a9c6494 DG |
2540 | /* Same for all domains. */ |
2541 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2542 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2543 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2544 | ||
5edd7e09 DG |
2545 | switch (domain->type) { |
2546 | case LTTNG_DOMAIN_KERNEL: | |
28ab034a | 2547 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
d92ff3ef | 2548 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2549 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2550 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2551 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
2552 | break; | |
2553 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2554 | switch (domain->buf_type) { |
2555 | case LTTNG_BUFFER_PER_UID: | |
2556 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2557 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2558 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
28ab034a JG |
2559 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; |
2560 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2561 | break; |
2562 | case LTTNG_BUFFER_PER_PID: | |
2563 | default: | |
2564 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2565 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2566 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
28ab034a JG |
2567 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; |
2568 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2569 | break; |
2570 | } | |
5edd7e09 | 2571 | default: |
441c16a7 | 2572 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2573 | break; |
2574 | } | |
cf0bcb51 | 2575 | |
999af9c1 JR |
2576 | if (extended) { |
2577 | lttng_channel_set_default_extended_attr(domain, extended); | |
2578 | } | |
2579 | ||
2580 | /* Reassign the extended pointer. */ | |
cf0bcb51 | 2581 | attr->extended.ptr = extended; |
5edd7e09 DG |
2582 | } |
2583 | ||
5ba3702f | 2584 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
28ab034a | 2585 | uint64_t *discarded_events) |
5ba3702f JG |
2586 | { |
2587 | int ret = 0; | |
cf0bcb51 | 2588 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2589 | |
2590 | if (!channel || !discarded_events) { | |
2591 | ret = -LTTNG_ERR_INVALID; | |
2592 | goto end; | |
2593 | } | |
2594 | ||
4bd69c5f | 2595 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2596 | if (!chan_ext) { |
2597 | /* | |
2598 | * This can happen since the lttng_channel structure is | |
2599 | * used for other tasks where this pointer is never set. | |
2600 | */ | |
2601 | *discarded_events = 0; | |
2602 | goto end; | |
2603 | } | |
2604 | ||
2605 | *discarded_events = chan_ext->discarded_events; | |
2606 | end: | |
2607 | return ret; | |
2608 | } | |
2609 | ||
28ab034a | 2610 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, uint64_t *lost_packets) |
5ba3702f JG |
2611 | { |
2612 | int ret = 0; | |
cf0bcb51 | 2613 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2614 | |
2615 | if (!channel || !lost_packets) { | |
2616 | ret = -LTTNG_ERR_INVALID; | |
2617 | goto end; | |
2618 | } | |
2619 | ||
4bd69c5f | 2620 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2621 | if (!chan_ext) { |
2622 | /* | |
2623 | * This can happen since the lttng_channel structure is | |
2624 | * used for other tasks where this pointer is never set. | |
2625 | */ | |
2626 | *lost_packets = 0; | |
2627 | goto end; | |
2628 | } | |
2629 | ||
2630 | *lost_packets = chan_ext->lost_packets; | |
2631 | end: | |
2632 | return ret; | |
2633 | } | |
2634 | ||
cf0bcb51 | 2635 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
28ab034a | 2636 | uint64_t *monitor_timer_interval) |
cf0bcb51 JG |
2637 | { |
2638 | int ret = 0; | |
2639 | ||
2640 | if (!chan || !monitor_timer_interval) { | |
2641 | ret = -LTTNG_ERR_INVALID; | |
2642 | goto end; | |
2643 | } | |
2644 | ||
2645 | if (!chan->attr.extended.ptr) { | |
2646 | ret = -LTTNG_ERR_INVALID; | |
2647 | goto end; | |
2648 | } | |
2649 | ||
28ab034a JG |
2650 | *monitor_timer_interval = |
2651 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->monitor_timer_interval; | |
cf0bcb51 JG |
2652 | end: |
2653 | return ret; | |
2654 | } | |
2655 | ||
2656 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
28ab034a | 2657 | uint64_t monitor_timer_interval) |
cf0bcb51 JG |
2658 | { |
2659 | int ret = 0; | |
2660 | ||
2661 | if (!chan || !chan->attr.extended.ptr) { | |
2662 | ret = -LTTNG_ERR_INVALID; | |
2663 | goto end; | |
2664 | } | |
2665 | ||
28ab034a JG |
2666 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->monitor_timer_interval = |
2667 | monitor_timer_interval; | |
cf0bcb51 JG |
2668 | end: |
2669 | return ret; | |
2670 | } | |
2671 | ||
28ab034a | 2672 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, int64_t *blocking_timeout) |
491d1539 MD |
2673 | { |
2674 | int ret = 0; | |
2675 | ||
2676 | if (!chan || !blocking_timeout) { | |
2677 | ret = -LTTNG_ERR_INVALID; | |
2678 | goto end; | |
2679 | } | |
2680 | ||
2681 | if (!chan->attr.extended.ptr) { | |
2682 | ret = -LTTNG_ERR_INVALID; | |
2683 | goto end; | |
2684 | } | |
2685 | ||
28ab034a JG |
2686 | *blocking_timeout = |
2687 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->blocking_timeout; | |
491d1539 MD |
2688 | end: |
2689 | return ret; | |
2690 | } | |
2691 | ||
28ab034a | 2692 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, int64_t blocking_timeout) |
491d1539 MD |
2693 | { |
2694 | int ret = 0; | |
2695 | int64_t msec_timeout; | |
2696 | ||
2697 | if (!chan || !chan->attr.extended.ptr) { | |
2698 | ret = -LTTNG_ERR_INVALID; | |
2699 | goto end; | |
2700 | } | |
2701 | ||
2702 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2703 | ret = -LTTNG_ERR_INVALID; | |
2704 | goto end; | |
2705 | } | |
2706 | ||
2707 | /* | |
2708 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2709 | * us to accept a narrower range of values (msecs expressed as a signed | |
2710 | * 32-bit integer). | |
2711 | */ | |
2712 | msec_timeout = blocking_timeout / 1000; | |
2713 | if (msec_timeout != (int32_t) msec_timeout) { | |
2714 | ret = -LTTNG_ERR_INVALID; | |
2715 | goto end; | |
2716 | } | |
2717 | ||
28ab034a JG |
2718 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->blocking_timeout = |
2719 | blocking_timeout; | |
491d1539 MD |
2720 | end: |
2721 | return ret; | |
2722 | } | |
2723 | ||
fac6795d | 2724 | /* |
2269e89e | 2725 | * Check if session daemon is alive. |
fac6795d | 2726 | * |
2269e89e | 2727 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2728 | * On error returns a negative value. |
fac6795d | 2729 | */ |
947308c4 | 2730 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2731 | { |
2732 | int ret; | |
2733 | ||
2734 | ret = set_session_daemon_path(); | |
2735 | if (ret < 0) { | |
9ae110e2 | 2736 | /* Error. */ |
fac6795d DG |
2737 | return ret; |
2738 | } | |
2739 | ||
9d035200 | 2740 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2741 | /* |
9ae110e2 JG |
2742 | * No socket path set. Weird error which means the constructor |
2743 | * was not called. | |
2f70b271 | 2744 | */ |
a0377dfe | 2745 | abort(); |
fac6795d DG |
2746 | } |
2747 | ||
2269e89e | 2748 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2749 | if (ret < 0) { |
9ae110e2 | 2750 | /* Not alive. */ |
7d8234d9 MD |
2751 | return 0; |
2752 | } | |
7d8234d9 | 2753 | |
9ae110e2 | 2754 | /* Is alive. */ |
947308c4 | 2755 | return 1; |
fac6795d DG |
2756 | } |
2757 | ||
00e2e675 | 2758 | /* |
a4b92340 | 2759 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2760 | * |
2761 | * Return 0 on success, else a negative value. | |
2762 | */ | |
a4b92340 | 2763 | int lttng_set_consumer_url(struct lttng_handle *handle, |
28ab034a JG |
2764 | const char *control_url, |
2765 | const char *data_url) | |
00e2e675 | 2766 | { |
3dd05a85 | 2767 | int ret; |
a4b92340 | 2768 | ssize_t size; |
00e2e675 | 2769 | struct lttcomm_session_msg lsm; |
a4b92340 | 2770 | struct lttng_uri *uris = NULL; |
00e2e675 | 2771 | |
a4b92340 | 2772 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
e1b624d0 JG |
2773 | ret = -LTTNG_ERR_INVALID; |
2774 | goto error; | |
00e2e675 DG |
2775 | } |
2776 | ||
a4b92340 DG |
2777 | memset(&lsm, 0, sizeof(lsm)); |
2778 | ||
37a5ef39 | 2779 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_SET_CONSUMER_URI; |
00e2e675 | 2780 | |
28ab034a | 2781 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2782 | if (ret) { |
2783 | ret = -LTTNG_ERR_INVALID; | |
2784 | goto error; | |
2785 | } | |
2786 | ||
60160d2a | 2787 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2788 | |
bc894455 | 2789 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2790 | if (size < 0) { |
e1b624d0 JG |
2791 | ret = -LTTNG_ERR_INVALID; |
2792 | goto error; | |
a4b92340 DG |
2793 | } |
2794 | ||
2795 | lsm.u.uri.size = size; | |
00e2e675 | 2796 | |
28ab034a JG |
2797 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( |
2798 | &lsm, uris, sizeof(struct lttng_uri) * size, NULL); | |
3dd05a85 DG |
2799 | |
2800 | free(uris); | |
e1b624d0 | 2801 | error: |
3dd05a85 | 2802 | return ret; |
00e2e675 DG |
2803 | } |
2804 | ||
2805 | /* | |
9c6bda17 | 2806 | * [OBSOLETE] |
00e2e675 | 2807 | */ |
28ab034a | 2808 | extern "C" LTTNG_EXPORT int lttng_enable_consumer(struct lttng_handle *handle); |
f46376a1 | 2809 | int lttng_enable_consumer(struct lttng_handle *handle __attribute__((unused))) |
00e2e675 | 2810 | { |
785d2d0d | 2811 | return -ENOSYS; |
00e2e675 DG |
2812 | } |
2813 | ||
2814 | /* | |
9c6bda17 | 2815 | * [OBSOLETE] |
00e2e675 | 2816 | */ |
28ab034a | 2817 | extern "C" LTTNG_EXPORT int lttng_disable_consumer(struct lttng_handle *handle); |
f46376a1 | 2818 | int lttng_disable_consumer(struct lttng_handle *handle __attribute__((unused))) |
00e2e675 | 2819 | { |
785d2d0d | 2820 | return -ENOSYS; |
00e2e675 DG |
2821 | } |
2822 | ||
07424f16 | 2823 | /* |
b178f53e | 2824 | * [OBSOLETE] |
07424f16 | 2825 | */ |
28ab034a JG |
2826 | extern "C" LTTNG_EXPORT int |
2827 | _lttng_create_session_ext(const char *name, const char *url, const char *datetime); | |
f46376a1 | 2828 | int _lttng_create_session_ext(const char *name __attribute__((unused)), |
28ab034a JG |
2829 | const char *url __attribute__((unused)), |
2830 | const char *datetime __attribute__((unused))) | |
07424f16 | 2831 | { |
b178f53e | 2832 | return -ENOSYS; |
07424f16 DG |
2833 | } |
2834 | ||
806e2684 DG |
2835 | /* |
2836 | * For a given session name, this call checks if the data is ready to be read | |
2837 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2838 | * any readers. | |
2839 | */ | |
6d805429 | 2840 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2841 | { |
2842 | int ret; | |
2843 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2844 | uint8_t *pending = NULL; |
806e2684 DG |
2845 | |
2846 | if (session_name == NULL) { | |
2847 | return -LTTNG_ERR_INVALID; | |
2848 | } | |
2849 | ||
53efb85a | 2850 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2851 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_DATA_PENDING; |
806e2684 | 2852 | |
28ab034a | 2853 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2854 | if (ret) { |
2855 | ret = -LTTNG_ERR_INVALID; | |
2856 | goto end; | |
2857 | } | |
806e2684 | 2858 | |
f6151c55 JG |
2859 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2860 | if (ret < 0) { | |
2861 | goto end; | |
2862 | } else if (ret != 1) { | |
2863 | /* Unexpected payload size */ | |
2864 | ret = -LTTNG_ERR_INVALID; | |
2865 | goto end; | |
e848d36d JG |
2866 | } else if (!pending) { |
2867 | /* Internal error. */ | |
2868 | ret = -LTTNG_ERR_UNK; | |
2869 | goto end; | |
806e2684 DG |
2870 | } |
2871 | ||
f6151c55 JG |
2872 | ret = (int) *pending; |
2873 | end: | |
2874 | free(pending); | |
806e2684 DG |
2875 | return ret; |
2876 | } | |
2877 | ||
93ec662e JD |
2878 | /* |
2879 | * Regenerate the metadata for a session. | |
2880 | * Return 0 on success, a negative error code on error. | |
2881 | */ | |
eded6438 | 2882 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2883 | { |
2884 | int ret; | |
2885 | struct lttcomm_session_msg lsm; | |
2886 | ||
2887 | if (!session_name) { | |
2888 | ret = -LTTNG_ERR_INVALID; | |
2889 | goto end; | |
2890 | } | |
2891 | ||
2892 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2893 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGENERATE_METADATA; |
93ec662e | 2894 | |
28ab034a | 2895 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2896 | if (ret) { |
2897 | ret = -LTTNG_ERR_INVALID; | |
2898 | goto end; | |
2899 | } | |
93ec662e JD |
2900 | |
2901 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2902 | if (ret < 0) { | |
2903 | goto end; | |
2904 | } | |
2905 | ||
2906 | ret = 0; | |
2907 | end: | |
2908 | return ret; | |
2909 | } | |
2910 | ||
eded6438 JD |
2911 | /* |
2912 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2913 | */ | |
2914 | int lttng_metadata_regenerate(const char *session_name) | |
2915 | { | |
2916 | return lttng_regenerate_metadata(session_name); | |
2917 | } | |
2918 | ||
c2561365 JD |
2919 | /* |
2920 | * Regenerate the statedump of a session. | |
2921 | * Return 0 on success, a negative error code on error. | |
2922 | */ | |
2923 | int lttng_regenerate_statedump(const char *session_name) | |
2924 | { | |
2925 | int ret; | |
2926 | struct lttcomm_session_msg lsm; | |
2927 | ||
2928 | if (!session_name) { | |
2929 | ret = -LTTNG_ERR_INVALID; | |
2930 | goto end; | |
2931 | } | |
2932 | ||
2933 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2934 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGENERATE_STATEDUMP; |
c2561365 | 2935 | |
28ab034a | 2936 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2937 | if (ret) { |
2938 | ret = -LTTNG_ERR_INVALID; | |
2939 | goto end; | |
2940 | } | |
c2561365 JD |
2941 | |
2942 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2943 | if (ret < 0) { | |
2944 | goto end; | |
2945 | } | |
2946 | ||
2947 | ret = 0; | |
2948 | end: | |
2949 | return ret; | |
2950 | } | |
2951 | ||
28ab034a JG |
2952 | static int |
2953 | _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, bool generate_name) | |
a58c490f JG |
2954 | { |
2955 | int ret; | |
99608320 | 2956 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 2957 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_REGISTER_TRIGGER, |
1c9a0b0e MJ |
2958 | .session = {}, |
2959 | .domain = {}, | |
2960 | .u = {}, | |
2961 | .fd_count = 0, | |
99608320 | 2962 | }; |
4bd69c5f | 2963 | lsm.u.trigger.is_trigger_anonymous = !name && !generate_name; |
99608320 JR |
2964 | struct lttcomm_session_msg *message_lsm; |
2965 | struct lttng_payload message; | |
2966 | struct lttng_payload reply; | |
242388e4 | 2967 | struct lttng_trigger *reply_trigger = NULL; |
9124c630 | 2968 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
2969 | const struct lttng_credentials user_creds = { |
2970 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
2971 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
2972 | }; | |
a5c2d2a7 JG |
2973 | const char *unused_trigger_name = NULL; |
2974 | enum lttng_trigger_status trigger_status; | |
99608320 JR |
2975 | |
2976 | lttng_payload_init(&message); | |
2977 | lttng_payload_init(&reply); | |
a58c490f JG |
2978 | |
2979 | if (!trigger) { | |
2980 | ret = -LTTNG_ERR_INVALID; | |
2981 | goto end; | |
2982 | } | |
2983 | ||
a5c2d2a7 JG |
2984 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
2985 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
2986 | /* Re-using already registered trigger. */ | |
2987 | ret = -LTTNG_ERR_INVALID; | |
2988 | goto end; | |
2989 | } | |
2990 | ||
2991 | if (name) { | |
2992 | trigger_status = lttng_trigger_set_name(trigger, name); | |
2993 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
2994 | ret = -LTTNG_ERR_NOMEM; | |
2995 | goto end; | |
2996 | } | |
2997 | } | |
2998 | ||
64eafdf6 JR |
2999 | if (!trigger->creds.uid.is_set) { |
3000 | /* Use the client's credentials as the trigger credentials. */ | |
3001 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3002 | } else { | |
3003 | /* | |
3004 | * Validate that either the current trigger credentials and the | |
3005 | * client credentials are identical or that the current user is | |
3006 | * root. The root user can register, unregister triggers for | |
3007 | * himself and other users. | |
3008 | * | |
3009 | * This check is also present on the sessiond side, using the | |
3010 | * credentials passed on the socket. These check are all | |
3011 | * "safety" checks. | |
3012 | */ | |
3013 | const struct lttng_credentials *trigger_creds = | |
28ab034a | 3014 | lttng_trigger_get_credentials(trigger); |
64eafdf6 JR |
3015 | |
3016 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3017 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3018 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 3019 | goto end_unset_name; |
64eafdf6 JR |
3020 | } |
3021 | } | |
3022 | } | |
3023 | ||
a58c490f | 3024 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3025 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 3026 | goto end_unset_name; |
a58c490f JG |
3027 | } |
3028 | ||
28ab034a | 3029 | domain_type = lttng_trigger_get_underlying_domain_type_restriction(trigger); |
9124c630 JR |
3030 | |
3031 | lsm.domain.type = domain_type; | |
3032 | ||
97285430 JG |
3033 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3034 | if (ret) { | |
3035 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 3036 | goto end_unset_name; |
97285430 | 3037 | } |
99608320 | 3038 | |
99608320 | 3039 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3040 | if (ret < 0) { |
a58c490f | 3041 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3042 | goto end_unset_name; |
a58c490f JG |
3043 | } |
3044 | ||
b22f4f54 JG |
3045 | /* |
3046 | * This is needed to populate the trigger object size for the command | |
3047 | * header. | |
3048 | */ | |
3049 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3050 | ||
99608320 JR |
3051 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3052 | ||
3053 | { | |
3054 | struct lttng_payload_view message_view = | |
28ab034a | 3055 | lttng_payload_view_from_payload(&message, 0, -1); |
99608320 | 3056 | |
28ab034a | 3057 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
99608320 JR |
3058 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); |
3059 | if (ret < 0) { | |
a5c2d2a7 | 3060 | goto end_unset_name; |
99608320 JR |
3061 | } |
3062 | } | |
3063 | ||
242388e4 JR |
3064 | { |
3065 | struct lttng_payload_view reply_view = | |
28ab034a | 3066 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
242388e4 | 3067 | |
28ab034a | 3068 | ret = lttng_trigger_create_from_payload(&reply_view, &reply_trigger); |
242388e4 | 3069 | if (ret < 0) { |
a5c2d2a7 JG |
3070 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3071 | goto end_unset_name; | |
242388e4 JR |
3072 | } |
3073 | } | |
3074 | ||
a5c2d2a7 JG |
3075 | if (name || generate_name) { |
3076 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3077 | if (ret < 0) { | |
3078 | ret = -LTTNG_ERR_NOMEM; | |
3079 | goto end; | |
3080 | } | |
242388e4 JR |
3081 | } |
3082 | ||
99608320 | 3083 | ret = 0; |
a5c2d2a7 JG |
3084 | goto end; |
3085 | ||
3086 | end_unset_name: | |
3087 | trigger_status = lttng_trigger_set_name(trigger, NULL); | |
3088 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3089 | ret = -LTTNG_ERR_UNK; | |
3090 | } | |
a58c490f | 3091 | end: |
99608320 JR |
3092 | lttng_payload_reset(&message); |
3093 | lttng_payload_reset(&reply); | |
242388e4 | 3094 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3095 | return ret; |
3096 | } | |
3097 | ||
a5c2d2a7 JG |
3098 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3099 | { | |
3100 | /* Register an anonymous trigger. */ | |
3101 | return _lttng_register_trigger(trigger, NULL, false); | |
3102 | } | |
3103 | ||
28ab034a JG |
3104 | enum lttng_error_code lttng_register_trigger_with_name(struct lttng_trigger *trigger, |
3105 | const char *name) | |
a5c2d2a7 JG |
3106 | { |
3107 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3108 | ||
28ab034a | 3109 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) - ret; |
a5c2d2a7 JG |
3110 | } |
3111 | ||
28ab034a | 3112 | enum lttng_error_code lttng_register_trigger_with_automatic_name(struct lttng_trigger *trigger) |
a5c2d2a7 | 3113 | { |
28ab034a | 3114 | const int ret = _lttng_register_trigger(trigger, nullptr, true); |
a5c2d2a7 | 3115 | |
28ab034a | 3116 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) - ret; |
a5c2d2a7 JG |
3117 | } |
3118 | ||
28ab034a JG |
3119 | enum lttng_error_code lttng_error_query_execute(const struct lttng_error_query *query, |
3120 | const struct lttng_endpoint *endpoint, | |
3121 | struct lttng_error_query_results **results) | |
b99a0cb3 JG |
3122 | { |
3123 | int ret; | |
3124 | enum lttng_error_code ret_code; | |
3125 | struct lttcomm_session_msg lsm = { | |
37a5ef39 | 3126 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY, |
1c9a0b0e MJ |
3127 | .session = {}, |
3128 | .domain = {}, | |
3129 | .u = {}, | |
3130 | .fd_count = 0, | |
b99a0cb3 JG |
3131 | }; |
3132 | struct lttng_payload message; | |
3133 | struct lttng_payload reply; | |
3134 | struct lttcomm_session_msg *message_lsm; | |
3135 | ||
3136 | lttng_payload_init(&message); | |
3137 | lttng_payload_init(&reply); | |
3138 | ||
3139 | if (!query || !results) { | |
3140 | ret_code = LTTNG_ERR_INVALID; | |
3141 | goto end; | |
3142 | } | |
3143 | ||
3144 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3145 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3146 | goto end; | |
3147 | } | |
3148 | ||
3149 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3150 | if (ret) { | |
3151 | ret_code = LTTNG_ERR_NOMEM; | |
3152 | goto end; | |
3153 | } | |
3154 | ||
3155 | ret = lttng_error_query_serialize(query, &message); | |
3156 | if (ret) { | |
3157 | ret_code = LTTNG_ERR_UNK; | |
3158 | goto end; | |
3159 | } | |
3160 | ||
3161 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
28ab034a | 3162 | message_lsm->u.error_query.length = (uint32_t) message.buffer.size - sizeof(lsm); |
b99a0cb3 JG |
3163 | |
3164 | { | |
3165 | struct lttng_payload_view message_view = | |
28ab034a | 3166 | lttng_payload_view_from_payload(&message, 0, -1); |
b99a0cb3 | 3167 | |
28ab034a | 3168 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
b99a0cb3 JG |
3169 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); |
3170 | if (ret < 0) { | |
28ab034a | 3171 | ret_code = (lttng_error_code) -ret; |
b99a0cb3 JG |
3172 | goto end; |
3173 | } | |
3174 | } | |
3175 | ||
3176 | { | |
3177 | ssize_t reply_create_ret; | |
3178 | struct lttng_payload_view reply_view = | |
28ab034a | 3179 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
b99a0cb3 | 3180 | |
28ab034a JG |
3181 | reply_create_ret = |
3182 | lttng_error_query_results_create_from_payload(&reply_view, results); | |
b99a0cb3 JG |
3183 | if (reply_create_ret < 0) { |
3184 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3185 | goto end; | |
3186 | } | |
3187 | } | |
3188 | ||
3189 | ret_code = LTTNG_OK; | |
3190 | end: | |
3191 | lttng_payload_reset(&message); | |
3192 | lttng_payload_reset(&reply); | |
3193 | return ret_code; | |
3194 | } | |
3195 | ||
b61776fb | 3196 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3197 | { |
3198 | int ret; | |
3199 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3200 | struct lttcomm_session_msg *message_lsm; |
3201 | struct lttng_payload message; | |
3202 | struct lttng_payload reply; | |
b61776fb | 3203 | struct lttng_trigger *copy = NULL; |
64eafdf6 JR |
3204 | const struct lttng_credentials user_creds = { |
3205 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3206 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3207 | }; | |
99608320 JR |
3208 | |
3209 | lttng_payload_init(&message); | |
3210 | lttng_payload_init(&reply); | |
a58c490f JG |
3211 | |
3212 | if (!trigger) { | |
3213 | ret = -LTTNG_ERR_INVALID; | |
3214 | goto end; | |
3215 | } | |
3216 | ||
b61776fb SM |
3217 | copy = lttng_trigger_copy(trigger); |
3218 | if (!copy) { | |
3219 | ret = -LTTNG_ERR_UNK; | |
3220 | goto end; | |
3221 | } | |
3222 | ||
3223 | if (!copy->creds.uid.is_set) { | |
3224 | /* Use the client credentials as the trigger credentials */ | |
3225 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3226 | } else { |
3227 | /* | |
3228 | * Validate that either the current trigger credentials and the | |
3229 | * client credentials are identical or that the current user is | |
3230 | * root. The root user can register, unregister triggers for | |
3231 | * himself and other users. | |
3232 | * | |
3233 | * This check is also present on the sessiond side, using the | |
3234 | * credentials passed on the socket. These check are all | |
3235 | * "safety" checks. | |
3236 | */ | |
28ab034a | 3237 | const struct lttng_credentials *trigger_creds = lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3238 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3239 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3240 | ret = -LTTNG_ERR_EPERM; | |
3241 | goto end; | |
3242 | } | |
3243 | } | |
3244 | } | |
3245 | ||
b61776fb | 3246 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3247 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3248 | goto end; |
3249 | } | |
3250 | ||
99608320 | 3251 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 3252 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_UNREGISTER_TRIGGER; |
99608320 | 3253 | |
97285430 JG |
3254 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3255 | if (ret) { | |
3256 | ret = -LTTNG_ERR_NOMEM; | |
3257 | goto end; | |
3258 | } | |
99608320 | 3259 | |
b61776fb | 3260 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3261 | if (ret < 0) { |
a58c490f JG |
3262 | ret = -LTTNG_ERR_UNK; |
3263 | goto end; | |
3264 | } | |
3265 | ||
b0a79813 FD |
3266 | /* |
3267 | * This is needed to populate the trigger object size for the command | |
3268 | * header and number of fds sent. | |
28ab034a | 3269 | */ |
b0a79813 FD |
3270 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; |
3271 | ||
99608320 JR |
3272 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3273 | ||
3274 | { | |
3275 | struct lttng_payload_view message_view = | |
28ab034a | 3276 | lttng_payload_view_from_payload(&message, 0, -1); |
99608320 JR |
3277 | |
3278 | /* | |
3279 | * Update the message header with the number of fd that will be | |
3280 | * sent. | |
3281 | */ | |
28ab034a | 3282 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
99608320 JR |
3283 | |
3284 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3285 | if (ret < 0) { | |
3286 | goto end; | |
3287 | } | |
3288 | } | |
3289 | ||
3290 | ret = 0; | |
a58c490f | 3291 | end: |
b61776fb | 3292 | lttng_trigger_destroy(copy); |
99608320 JR |
3293 | lttng_payload_reset(&message); |
3294 | lttng_payload_reset(&reply); | |
a58c490f JG |
3295 | return ret; |
3296 | } | |
3297 | ||
fbc9f37d JR |
3298 | /* |
3299 | * Ask the session daemon for all registered triggers for the current user. | |
3300 | * | |
3301 | * Allocates and return an lttng_triggers set. | |
3302 | * On error, returns a suitable lttng_error_code. | |
3303 | */ | |
3304 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3305 | { | |
3306 | int ret; | |
3307 | enum lttng_error_code ret_code = LTTNG_OK; | |
1c9a0b0e | 3308 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 3309 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS, |
1c9a0b0e MJ |
3310 | .session = {}, |
3311 | .domain = {}, | |
3312 | .u = {}, | |
3313 | .fd_count = 0, | |
3314 | }; | |
fbc9f37d JR |
3315 | struct lttng_triggers *local_triggers = NULL; |
3316 | struct lttng_payload reply; | |
3317 | struct lttng_payload_view lsm_view = | |
28ab034a | 3318 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
fbc9f37d JR |
3319 | |
3320 | lttng_payload_init(&reply); | |
3321 | ||
3322 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3323 | if (ret < 0) { | |
28ab034a | 3324 | ret_code = (enum lttng_error_code) - ret; |
fbc9f37d JR |
3325 | goto end; |
3326 | } | |
3327 | ||
3328 | { | |
3329 | struct lttng_payload_view reply_view = | |
28ab034a | 3330 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
fbc9f37d | 3331 | |
28ab034a | 3332 | ret = lttng_triggers_create_from_payload(&reply_view, &local_triggers); |
fbc9f37d JR |
3333 | if (ret < 0) { |
3334 | ret_code = LTTNG_ERR_FATAL; | |
3335 | goto end; | |
3336 | } | |
3337 | } | |
3338 | ||
3339 | *triggers = local_triggers; | |
3340 | local_triggers = NULL; | |
3341 | end: | |
3342 | lttng_payload_reset(&reply); | |
3343 | lttng_triggers_destroy(local_triggers); | |
3344 | return ret_code; | |
3345 | } | |
3346 | ||
fac6795d | 3347 | /* |
9ae110e2 | 3348 | * lib constructor. |
fac6795d | 3349 | */ |
b2b89e8a | 3350 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3351 | { |
3352 | /* Set default session group */ | |
bbccc3d2 | 3353 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3354 | } |
49cca668 DG |
3355 | |
3356 | /* | |
9ae110e2 | 3357 | * lib destructor. |
49cca668 | 3358 | */ |
b2b89e8a | 3359 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3360 | { |
3361 | free(tracing_group); | |
3362 | } |