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> | |
d93bbc2a | 27 | #include <common/make-unique-wrapper.hpp> |
c9e313bc SM |
28 | #include <common/payload-view.hpp> |
29 | #include <common/payload.hpp> | |
30 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
31 | #include <common/tracker.hpp> | |
32 | #include <common/unix.hpp> | |
33 | #include <common/uri.hpp> | |
34 | #include <common/utils.hpp> | |
28ab034a | 35 | |
c9e313bc | 36 | #include <lttng/channel-internal.hpp> |
159b042f JG |
37 | #include <lttng/destruction-handle.h> |
38 | #include <lttng/endpoint.h> | |
c9e313bc SM |
39 | #include <lttng/error-query-internal.hpp> |
40 | #include <lttng/event-internal.hpp> | |
41 | #include <lttng/health-internal.hpp> | |
b99a0cb3 | 42 | #include <lttng/lttng-error.h> |
159b042f | 43 | #include <lttng/lttng.h> |
c9e313bc SM |
44 | #include <lttng/session-descriptor-internal.hpp> |
45 | #include <lttng/session-internal.hpp> | |
46 | #include <lttng/trigger/trigger-internal.hpp> | |
47 | #include <lttng/userspace-probe-internal.hpp> | |
fac6795d | 48 | |
28ab034a JG |
49 | #include <grp.h> |
50 | #include <stdint.h> | |
51 | #include <stdio.h> | |
52 | #include <stdlib.h> | |
53 | #include <string.h> | |
54 | #include <unistd.h> | |
53a80697 | 55 | |
5c7248cd JG |
56 | #define COPY_DOMAIN_PACKED(dst, src) \ |
57 | do { \ | |
58 | struct lttng_domain _tmp_domain; \ | |
59 | \ | |
60 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &(src)); \ | |
61 | (dst) = _tmp_domain; \ | |
28ab034a | 62 | } while (0) |
53a80697 | 63 | |
fac6795d | 64 | /* Socket to session daemon for communication */ |
3e3665b8 | 65 | static int sessiond_socket = -1; |
fac6795d DG |
66 | static char sessiond_sock_path[PATH_MAX]; |
67 | ||
fac6795d DG |
68 | /* Variables */ |
69 | static char *tracing_group; | |
70 | static int connected; | |
71 | ||
97e19046 DG |
72 | /* Global */ |
73 | ||
74 | /* | |
75 | * Those two variables are used by error.h to silent or control the verbosity of | |
76 | * error message. They are global to the library so application linking with it | |
77 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 | 78 | */ |
4bd69c5f SM |
79 | LTTNG_EXPORT int lttng_opt_quiet; |
80 | LTTNG_EXPORT int lttng_opt_verbose; | |
81 | LTTNG_EXPORT int lttng_opt_mi; | |
97e19046 | 82 | |
fac6795d | 83 | /* |
cd80958d | 84 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 85 | * |
cd80958d DG |
86 | * If domain is unknown, default domain will be the kernel. |
87 | */ | |
28ab034a | 88 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, struct lttng_domain *src) |
cd80958d DG |
89 | { |
90 | if (src && dst) { | |
91 | switch (src->type) { | |
00e2e675 DG |
92 | case LTTNG_DOMAIN_KERNEL: |
93 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 94 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 95 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 96 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
97 | memcpy(dst, src, sizeof(struct lttng_domain)); |
98 | break; | |
99 | default: | |
100 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 101 | break; |
cd80958d DG |
102 | } |
103 | } | |
104 | } | |
105 | ||
106 | /* | |
107 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 108 | * |
1c8d13c8 TD |
109 | * On success, returns the number of bytes sent (>=0) |
110 | * On error, returns -1 | |
fac6795d | 111 | */ |
cd80958d | 112 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
113 | { |
114 | int ret; | |
115 | ||
116 | if (!connected) { | |
2f70b271 | 117 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 118 | goto end; |
fac6795d DG |
119 | } |
120 | ||
28ab034a JG |
121 | DBG("LSM cmd type: '%s' (%d)", |
122 | lttcomm_sessiond_command_str((lttcomm_sessiond_command) lsm->cmd_type), | |
123 | lsm->cmd_type); | |
a4b92340 | 124 | |
28ab034a JG |
125 | ret = lttcomm_send_creds_unix_sock( |
126 | sessiond_socket, lsm, sizeof(struct lttcomm_session_msg)); | |
2f70b271 DG |
127 | if (ret < 0) { |
128 | ret = -LTTNG_ERR_FATAL; | |
129 | } | |
e065084a DG |
130 | |
131 | end: | |
132 | return ret; | |
133 | } | |
134 | ||
53a80697 MD |
135 | /* |
136 | * Send var len data to the session daemon. | |
137 | * | |
138 | * On success, returns the number of bytes sent (>=0) | |
139 | * On error, returns -1 | |
140 | */ | |
c2d69327 | 141 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
142 | { |
143 | int ret; | |
144 | ||
145 | if (!connected) { | |
2f70b271 | 146 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
147 | goto end; |
148 | } | |
a4b92340 | 149 | |
53a80697 MD |
150 | if (!data || !len) { |
151 | ret = 0; | |
152 | goto end; | |
153 | } | |
154 | ||
155 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
156 | if (ret < 0) { |
157 | ret = -LTTNG_ERR_FATAL; | |
158 | } | |
53a80697 MD |
159 | |
160 | end: | |
161 | return ret; | |
162 | } | |
163 | ||
a04d53fc FD |
164 | /* |
165 | * Send file descriptors to the session daemon. | |
166 | * | |
167 | * On success, returns the number of bytes sent (>=0) | |
168 | * On error, returns -1 | |
169 | */ | |
170 | static int send_session_fds(const int *fds, size_t nb_fd) | |
171 | { | |
172 | int ret; | |
173 | ||
174 | if (!connected) { | |
175 | ret = -LTTNG_ERR_NO_SESSIOND; | |
176 | goto end; | |
177 | } | |
178 | ||
179 | if (!fds || !nb_fd) { | |
180 | ret = 0; | |
181 | goto end; | |
182 | } | |
183 | ||
184 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
185 | if (ret < 0) { | |
186 | ret = -LTTNG_ERR_FATAL; | |
187 | } | |
188 | ||
189 | end: | |
190 | return ret; | |
191 | } | |
192 | ||
e065084a | 193 | /* |
cd80958d | 194 | * Receive data from the sessiond socket. |
e065084a | 195 | * |
1c8d13c8 | 196 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 197 | * On error, returns a negative lttng_error_code. |
e065084a | 198 | */ |
ca95a216 | 199 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
200 | { |
201 | int ret; | |
202 | ||
a0377dfe | 203 | LTTNG_ASSERT(len > 0); |
bacc41cc | 204 | |
e065084a | 205 | if (!connected) { |
2f70b271 | 206 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 207 | goto end; |
fac6795d DG |
208 | } |
209 | ||
ca95a216 | 210 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
211 | if (ret < 0) { |
212 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
213 | } else if (ret == 0) { |
214 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 215 | } |
fac6795d | 216 | |
e065084a | 217 | end: |
fac6795d DG |
218 | return ret; |
219 | } | |
220 | ||
e368fb43 JG |
221 | /* |
222 | * Receive a payload from the session daemon by appending to an existing | |
223 | * payload. | |
224 | * On success, returns the number of bytes received (>=0) | |
225 | * On error, returns a negative lttng_error_code. | |
226 | */ | |
227 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
228 | { | |
229 | int ret; | |
230 | const size_t original_payload_size = payload->buffer.size; | |
231 | ||
28ab034a | 232 | ret = lttng_dynamic_buffer_set_size(&payload->buffer, payload->buffer.size + len); |
e368fb43 JG |
233 | if (ret) { |
234 | ret = -LTTNG_ERR_NOMEM; | |
235 | goto end; | |
236 | } | |
237 | ||
28ab034a | 238 | ret = recv_data_sessiond(payload->buffer.data + original_payload_size, len); |
e368fb43 JG |
239 | end: |
240 | return ret; | |
241 | } | |
242 | ||
fac6795d | 243 | /* |
9ae110e2 | 244 | * Check if we are in the specified group. |
65beb5ff | 245 | * |
9ae110e2 | 246 | * If yes return 1, else return -1. |
947308c4 | 247 | */ |
cd9adb8b | 248 | int lttng_check_tracing_group() |
947308c4 | 249 | { |
28ab59d0 | 250 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
251 | int grp_list_size, grp_id, i; |
252 | int ret = -1; | |
6c71277b | 253 | const char *grp_name = tracing_group; |
947308c4 DG |
254 | |
255 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 256 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 257 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
258 | goto end; |
259 | } | |
260 | ||
261 | /* Get number of supplementary group IDs */ | |
cd9adb8b | 262 | grp_list_size = getgroups(0, nullptr); |
947308c4 | 263 | if (grp_list_size < 0) { |
6f04ed72 | 264 | PERROR("getgroups"); |
947308c4 DG |
265 | goto end; |
266 | } | |
267 | ||
268 | /* Alloc group list of the right size */ | |
64803277 | 269 | grp_list = calloc<gid_t>(grp_list_size); |
00795392 | 270 | if (!grp_list) { |
6f04ed72 | 271 | PERROR("malloc"); |
00795392 MD |
272 | goto end; |
273 | } | |
947308c4 | 274 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 275 | if (grp_id < 0) { |
6f04ed72 | 276 | PERROR("getgroups"); |
947308c4 DG |
277 | goto free_list; |
278 | } | |
279 | ||
280 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 281 | if (grp_list[i] == tracing_gid) { |
2269e89e | 282 | ret = 1; |
947308c4 DG |
283 | break; |
284 | } | |
285 | } | |
286 | ||
287 | free_list: | |
288 | free(grp_list); | |
289 | ||
290 | end: | |
291 | return ret; | |
292 | } | |
293 | ||
28ab034a | 294 | static enum lttng_error_code check_enough_available_memory(uint64_t num_bytes_requested_per_cpu) |
09b72f7a FD |
295 | { |
296 | int ret; | |
13dd7782 | 297 | enum lttng_error_code ret_code; |
09b72f7a | 298 | long num_cpu; |
13dd7782 JR |
299 | uint64_t best_mem_info; |
300 | uint64_t num_bytes_requested_total; | |
09b72f7a FD |
301 | |
302 | /* | |
303 | * Get the number of CPU currently online to compute the amount of | |
304 | * memory needed to create a buffer for every CPU. | |
305 | */ | |
306 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
307 | if (num_cpu == -1) { | |
13dd7782 JR |
308 | ret_code = LTTNG_ERR_FATAL; |
309 | goto end; | |
310 | } | |
311 | ||
312 | if (num_bytes_requested_per_cpu > UINT64_MAX / (uint64_t) num_cpu) { | |
313 | /* Overflow */ | |
314 | ret_code = LTTNG_ERR_OVERFLOW; | |
315 | goto end; | |
09b72f7a FD |
316 | } |
317 | ||
28ab034a | 318 | num_bytes_requested_total = num_bytes_requested_per_cpu * (uint64_t) num_cpu; |
09b72f7a FD |
319 | |
320 | /* | |
321 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
322 | * reliable estimate we can get but it is only exposed by the kernel | |
323 | * since 3.14. (See Linux kernel commit: | |
324 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
325 | */ | |
326 | ret = utils_get_memory_available(&best_mem_info); | |
327 | if (ret >= 0) { | |
328 | goto success; | |
329 | } | |
330 | ||
331 | /* | |
332 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
333 | * is a sanity check for obvious user error. | |
334 | */ | |
335 | ret = utils_get_memory_total(&best_mem_info); | |
336 | if (ret >= 0) { | |
337 | goto success; | |
338 | } | |
339 | ||
13dd7782 JR |
340 | /* No valid source of information. */ |
341 | ret_code = LTTNG_ERR_NOMEM; | |
342 | goto end; | |
343 | ||
09b72f7a | 344 | success: |
13dd7782 JR |
345 | if (best_mem_info >= num_bytes_requested_total) { |
346 | ret_code = LTTNG_OK; | |
347 | } else { | |
348 | ret_code = LTTNG_ERR_NOMEM; | |
349 | } | |
350 | end: | |
351 | return ret_code; | |
09b72f7a FD |
352 | } |
353 | ||
947308c4 | 354 | /* |
2269e89e DG |
355 | * Try connect to session daemon with sock_path. |
356 | * | |
357 | * Return 0 on success, else -1 | |
358 | */ | |
359 | static int try_connect_sessiond(const char *sock_path) | |
360 | { | |
361 | int ret; | |
362 | ||
363 | /* If socket exist, we check if the daemon listens for connect. */ | |
364 | ret = access(sock_path, F_OK); | |
365 | if (ret < 0) { | |
366 | /* Not alive */ | |
2f70b271 | 367 | goto error; |
2269e89e DG |
368 | } |
369 | ||
370 | ret = lttcomm_connect_unix_sock(sock_path); | |
371 | if (ret < 0) { | |
9ae110e2 | 372 | /* Not alive. */ |
2f70b271 | 373 | goto error; |
2269e89e DG |
374 | } |
375 | ||
376 | ret = lttcomm_close_unix_sock(ret); | |
377 | if (ret < 0) { | |
6f04ed72 | 378 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
379 | } |
380 | ||
381 | return 0; | |
2f70b271 DG |
382 | |
383 | error: | |
384 | return -1; | |
2269e89e DG |
385 | } |
386 | ||
387 | /* | |
2f70b271 DG |
388 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
389 | * variable. | |
390 | * | |
391 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
392 | * is somehow too long or ENOMEM). | |
947308c4 | 393 | */ |
cd9adb8b | 394 | static int set_session_daemon_path() |
947308c4 | 395 | { |
28ab034a | 396 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
397 | uid_t uid; |
398 | ||
399 | uid = getuid(); | |
947308c4 | 400 | |
2269e89e DG |
401 | if (uid != 0) { |
402 | /* Are we in the tracing group ? */ | |
6c71277b | 403 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
404 | } |
405 | ||
c295ec41 | 406 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 | 407 | const int ret = lttng_strncpy(sessiond_sock_path, |
28ab034a JG |
408 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, |
409 | sizeof(sessiond_sock_path)); | |
e1b624d0 JG |
410 | |
411 | if (ret) { | |
412 | goto error; | |
413 | } | |
08a9c49f | 414 | } |
2269e89e | 415 | |
08a9c49f | 416 | if (uid != 0) { |
c617c0c6 MD |
417 | int ret; |
418 | ||
08a9c49f | 419 | if (in_tgroup) { |
9ae110e2 | 420 | /* Tracing group. */ |
08a9c49f TD |
421 | ret = try_connect_sessiond(sessiond_sock_path); |
422 | if (ret >= 0) { | |
423 | goto end; | |
2269e89e | 424 | } |
08a9c49f | 425 | /* Global session daemon not available... */ |
2269e89e | 426 | } |
08a9c49f TD |
427 | /* ...or not in tracing group (and not root), default */ |
428 | ||
429 | /* | |
9ae110e2 JG |
430 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
431 | * is too small; | |
432 | * With GNU C >= 2.1, snprintf returns the required size | |
433 | * (excluding closing null) | |
08a9c49f | 434 | */ |
28ab034a JG |
435 | ret = snprintf(sessiond_sock_path, |
436 | sizeof(sessiond_sock_path), | |
437 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
438 | utils_get_home_dir()); | |
08a9c49f | 439 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 440 | goto error; |
947308c4 | 441 | } |
947308c4 | 442 | } |
08a9c49f | 443 | end: |
947308c4 | 444 | return 0; |
2f70b271 DG |
445 | |
446 | error: | |
447 | return -1; | |
947308c4 DG |
448 | } |
449 | ||
65beb5ff | 450 | /* |
9ae110e2 | 451 | * Connect to the LTTng session daemon. |
65beb5ff | 452 | * |
3e3665b8 | 453 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 454 | */ |
cd9adb8b | 455 | int connect_sessiond() |
65beb5ff DG |
456 | { |
457 | int ret; | |
458 | ||
459 | ret = set_session_daemon_path(); | |
460 | if (ret < 0) { | |
2f70b271 | 461 | goto error; |
65beb5ff DG |
462 | } |
463 | ||
9ae110e2 | 464 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
465 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
466 | if (ret < 0) { | |
2f70b271 | 467 | goto error; |
65beb5ff DG |
468 | } |
469 | ||
3e3665b8 | 470 | return ret; |
2f70b271 DG |
471 | |
472 | error: | |
473 | return -1; | |
65beb5ff DG |
474 | } |
475 | ||
cd9adb8b | 476 | static void reset_global_sessiond_connection_state() |
3e3665b8 JG |
477 | { |
478 | sessiond_socket = -1; | |
479 | connected = 0; | |
480 | } | |
481 | ||
65beb5ff | 482 | /* |
1c8d13c8 | 483 | * Clean disconnect from the session daemon. |
9ae110e2 | 484 | * |
1c8d13c8 | 485 | * On success, return 0. On error, return -1. |
65beb5ff | 486 | */ |
cd9adb8b | 487 | static int disconnect_sessiond() |
65beb5ff DG |
488 | { |
489 | int ret = 0; | |
490 | ||
491 | if (connected) { | |
492 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 493 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
494 | } |
495 | ||
496 | return ret; | |
497 | } | |
498 | ||
28ab034a | 499 | static int recv_sessiond_optional_data(size_t len, void **user_buf, size_t *user_len) |
795a978d PP |
500 | { |
501 | int ret = 0; | |
cd9adb8b | 502 | char *buf = nullptr; |
795a978d PP |
503 | |
504 | if (len) { | |
505 | if (!user_len) { | |
506 | ret = -LTTNG_ERR_INVALID; | |
507 | goto end; | |
508 | } | |
509 | ||
64803277 | 510 | buf = zmalloc<char>(len); |
795a978d PP |
511 | if (!buf) { |
512 | ret = -ENOMEM; | |
513 | goto end; | |
514 | } | |
515 | ||
516 | ret = recv_data_sessiond(buf, len); | |
517 | if (ret < 0) { | |
518 | goto end; | |
519 | } | |
520 | ||
521 | if (!user_buf) { | |
522 | ret = -LTTNG_ERR_INVALID; | |
523 | goto end; | |
524 | } | |
525 | ||
526 | /* Move ownership of command header buffer to user. */ | |
527 | *user_buf = buf; | |
cd9adb8b | 528 | buf = nullptr; |
795a978d PP |
529 | *user_len = len; |
530 | } else { | |
531 | /* No command header. */ | |
532 | if (user_len) { | |
533 | *user_len = 0; | |
534 | } | |
535 | ||
536 | if (user_buf) { | |
cd9adb8b | 537 | *user_buf = nullptr; |
795a978d PP |
538 | } |
539 | } | |
540 | ||
541 | end: | |
542 | free(buf); | |
543 | return ret; | |
544 | } | |
545 | ||
35a6fdb7 | 546 | /* |
cd80958d | 547 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
548 | * Takes extra var. len. data and file descriptors as input to send to the |
549 | * session daemon. | |
65beb5ff | 550 | * |
af87c45a | 551 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 552 | */ |
a04d53fc | 553 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
28ab034a JG |
554 | const int *fds, |
555 | size_t nb_fd, | |
556 | const void *vardata, | |
557 | size_t vardata_len, | |
558 | void **user_payload_buf, | |
559 | void **user_cmd_header_buf, | |
560 | size_t *user_cmd_header_len) | |
65beb5ff DG |
561 | { |
562 | int ret; | |
795a978d | 563 | size_t payload_len; |
cd80958d | 564 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
565 | |
566 | ret = connect_sessiond(); | |
567 | if (ret < 0) { | |
2f70b271 | 568 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 569 | goto end; |
3e3665b8 JG |
570 | } else { |
571 | sessiond_socket = ret; | |
572 | connected = 1; | |
65beb5ff DG |
573 | } |
574 | ||
cd80958d | 575 | ret = send_session_msg(lsm); |
65beb5ff | 576 | if (ret < 0) { |
2f70b271 | 577 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
578 | goto end; |
579 | } | |
53a80697 | 580 | /* Send var len data */ |
795a978d | 581 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 582 | if (ret < 0) { |
2f70b271 | 583 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
584 | goto end; |
585 | } | |
65beb5ff | 586 | |
a04d53fc FD |
587 | /* Send fds */ |
588 | ret = send_session_fds(fds, nb_fd); | |
589 | if (ret < 0) { | |
590 | /* Ret value is a valid lttng error code. */ | |
591 | goto end; | |
592 | } | |
593 | ||
65beb5ff DG |
594 | /* Get header from data transmission */ |
595 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
596 | if (ret < 0) { | |
2f70b271 | 597 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
598 | goto end; |
599 | } | |
600 | ||
601 | /* Check error code if OK */ | |
f73fabfd | 602 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
603 | ret = -llm.ret_code; |
604 | goto end; | |
605 | } | |
606 | ||
795a978d | 607 | /* Get command header from data transmission */ |
28ab034a JG |
608 | ret = recv_sessiond_optional_data( |
609 | llm.cmd_header_size, user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 610 | if (ret < 0) { |
65beb5ff DG |
611 | goto end; |
612 | } | |
613 | ||
795a978d | 614 | /* Get payload from data transmission */ |
28ab034a | 615 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, &payload_len); |
795a978d | 616 | if (ret < 0) { |
83009e5e DG |
617 | goto end; |
618 | } | |
619 | ||
795a978d | 620 | ret = llm.data_size; |
65beb5ff DG |
621 | |
622 | end: | |
623 | disconnect_sessiond(); | |
624 | return ret; | |
625 | } | |
626 | ||
28ab034a | 627 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, struct lttng_payload *reply) |
e368fb43 JG |
628 | { |
629 | int ret; | |
630 | struct lttcomm_lttng_msg llm; | |
fe489250 | 631 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 | 632 | |
a0377dfe FD |
633 | LTTNG_ASSERT(reply->buffer.size == 0); |
634 | LTTNG_ASSERT(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); | |
e368fb43 JG |
635 | |
636 | ret = connect_sessiond(); | |
637 | if (ret < 0) { | |
638 | ret = -LTTNG_ERR_NO_SESSIOND; | |
639 | goto end; | |
640 | } else { | |
641 | sessiond_socket = ret; | |
642 | connected = 1; | |
643 | } | |
644 | ||
645 | /* Send command to session daemon */ | |
28ab034a JG |
646 | ret = lttcomm_send_creds_unix_sock( |
647 | sessiond_socket, message->buffer.data, message->buffer.size); | |
e368fb43 JG |
648 | if (ret < 0) { |
649 | ret = -LTTNG_ERR_FATAL; | |
650 | goto end; | |
651 | } | |
652 | ||
fe489250 | 653 | if (fd_count > 0) { |
28ab034a | 654 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, message); |
fe489250 JG |
655 | if (ret < 0) { |
656 | ret = -LTTNG_ERR_FATAL; | |
657 | goto end; | |
658 | } | |
e368fb43 JG |
659 | } |
660 | ||
661 | /* Get header from data transmission */ | |
662 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
663 | if (ret < 0) { | |
664 | /* Ret value is a valid lttng error code. */ | |
665 | goto end; | |
666 | } | |
667 | ||
668 | llm = *((typeof(llm) *) reply->buffer.data); | |
669 | ||
670 | /* Check error code if OK */ | |
671 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
672 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
673 | /* Invalid error code received. */ | |
674 | ret = -LTTNG_ERR_UNK; | |
675 | } else { | |
676 | ret = -llm.ret_code; | |
677 | } | |
e368fb43 JG |
678 | goto end; |
679 | } | |
680 | ||
681 | if (llm.cmd_header_size > 0) { | |
682 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
683 | if (ret < 0) { | |
684 | goto end; | |
685 | } | |
686 | } | |
687 | ||
688 | /* Get command header from data transmission */ | |
689 | if (llm.data_size > 0) { | |
690 | ret = recv_payload_sessiond(reply, llm.data_size); | |
691 | if (ret < 0) { | |
692 | goto end; | |
693 | } | |
694 | } | |
695 | ||
696 | if (llm.fd_count > 0) { | |
28ab034a | 697 | ret = lttcomm_recv_payload_fds_unix_sock(sessiond_socket, llm.fd_count, reply); |
fe489250 | 698 | if (ret < 0) { |
e368fb43 JG |
699 | goto end; |
700 | } | |
701 | } | |
702 | ||
703 | /* Don't return the llm header to the caller. */ | |
28ab034a JG |
704 | memmove(reply->buffer.data, |
705 | reply->buffer.data + sizeof(llm), | |
706 | reply->buffer.size - sizeof(llm)); | |
707 | ret = lttng_dynamic_buffer_set_size(&reply->buffer, reply->buffer.size - sizeof(llm)); | |
e368fb43 JG |
708 | if (ret) { |
709 | /* Can't happen as size is reduced. */ | |
710 | abort(); | |
711 | } | |
712 | ||
713 | ret = reply->buffer.size; | |
714 | ||
715 | end: | |
716 | disconnect_sessiond(); | |
717 | return ret; | |
718 | } | |
719 | ||
9f19cc17 | 720 | /* |
cd80958d | 721 | * Create lttng handle and return pointer. |
9ae110e2 | 722 | * |
1c8d13c8 | 723 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 724 | */ |
28ab034a | 725 | struct lttng_handle *lttng_create_handle(const char *session_name, struct lttng_domain *domain) |
9f19cc17 | 726 | { |
e1b624d0 | 727 | int ret; |
cd9adb8b | 728 | struct lttng_handle *handle = nullptr; |
2f70b271 | 729 | |
64803277 | 730 | handle = zmalloc<lttng_handle>(); |
cd9adb8b | 731 | if (handle == nullptr) { |
2f70b271 | 732 | PERROR("malloc handle"); |
cd80958d DG |
733 | goto end; |
734 | } | |
735 | ||
736 | /* Copy session name */ | |
28ab034a | 737 | ret = lttng_strncpy(handle->session_name, session_name ?: "", sizeof(handle->session_name)); |
e1b624d0 JG |
738 | if (ret) { |
739 | goto error; | |
740 | } | |
cd80958d | 741 | |
95681498 JG |
742 | /* Copy lttng domain or leave initialized to 0. */ |
743 | if (domain) { | |
744 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
745 | } | |
cd80958d DG |
746 | |
747 | end: | |
748 | return handle; | |
e1b624d0 JG |
749 | error: |
750 | free(handle); | |
cd9adb8b | 751 | return nullptr; |
cd80958d DG |
752 | } |
753 | ||
754 | /* | |
755 | * Destroy handle by free(3) the pointer. | |
756 | */ | |
757 | void lttng_destroy_handle(struct lttng_handle *handle) | |
758 | { | |
0e428499 | 759 | free(handle); |
eb354453 DG |
760 | } |
761 | ||
d9800920 DG |
762 | /* |
763 | * Register an outside consumer. | |
9ae110e2 | 764 | * |
1c8d13c8 | 765 | * Returns size of returned session payload data or a negative error code. |
d9800920 | 766 | */ |
28ab034a | 767 | int lttng_register_consumer(struct lttng_handle *handle, const char *socket_path) |
d9800920 | 768 | { |
e1b624d0 | 769 | int ret; |
d9800920 DG |
770 | struct lttcomm_session_msg lsm; |
771 | ||
cd9adb8b | 772 | if (handle == nullptr || socket_path == nullptr) { |
e1b624d0 JG |
773 | ret = -LTTNG_ERR_INVALID; |
774 | goto end; | |
2f70b271 DG |
775 | } |
776 | ||
53efb85a | 777 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 778 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGISTER_CONSUMER; |
28ab034a | 779 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
780 | if (ret) { |
781 | ret = -LTTNG_ERR_INVALID; | |
782 | goto end; | |
783 | } | |
784 | ||
60160d2a | 785 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 786 | |
28ab034a | 787 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
e1b624d0 JG |
788 | if (ret) { |
789 | ret = -LTTNG_ERR_INVALID; | |
790 | goto end; | |
791 | } | |
d9800920 | 792 | |
cd9adb8b | 793 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
e1b624d0 JG |
794 | end: |
795 | return ret; | |
d9800920 DG |
796 | } |
797 | ||
1df4dedd | 798 | /* |
9ae110e2 JG |
799 | * Start tracing for all traces of the session. |
800 | * | |
801 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 802 | */ |
6a4f824d | 803 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 804 | { |
e1b624d0 | 805 | int ret; |
cd80958d DG |
806 | struct lttcomm_session_msg lsm; |
807 | ||
cd9adb8b | 808 | if (session_name == nullptr) { |
e1b624d0 JG |
809 | ret = -LTTNG_ERR_INVALID; |
810 | goto end; | |
cd80958d DG |
811 | } |
812 | ||
53efb85a | 813 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 814 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_START_TRACE; |
6a4f824d | 815 | |
28ab034a | 816 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
817 | if (ret) { |
818 | ret = -LTTNG_ERR_INVALID; | |
819 | goto end; | |
820 | } | |
cd80958d | 821 | |
cd9adb8b | 822 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
e1b624d0 JG |
823 | end: |
824 | return ret; | |
f3ed775e | 825 | } |
1df4dedd DG |
826 | |
827 | /* | |
38ee087f | 828 | * Stop tracing for all traces of the session. |
f3ed775e | 829 | */ |
38ee087f | 830 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 831 | { |
38ee087f | 832 | int ret, data_ret; |
cd80958d DG |
833 | struct lttcomm_session_msg lsm; |
834 | ||
cd9adb8b | 835 | if (session_name == nullptr) { |
e1b624d0 JG |
836 | ret = -LTTNG_ERR_INVALID; |
837 | goto error; | |
6a4f824d DG |
838 | } |
839 | ||
53efb85a | 840 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 841 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_STOP_TRACE; |
6a4f824d | 842 | |
28ab034a | 843 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
844 | if (ret) { |
845 | ret = -LTTNG_ERR_INVALID; | |
846 | goto error; | |
847 | } | |
cd80958d | 848 | |
cd9adb8b | 849 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
38ee087f DG |
850 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
851 | goto error; | |
852 | } | |
853 | ||
854 | if (!wait) { | |
855 | goto end; | |
856 | } | |
857 | ||
38ee087f DG |
858 | /* Check for data availability */ |
859 | do { | |
6d805429 | 860 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
861 | if (data_ret < 0) { |
862 | /* Return the data available call error. */ | |
863 | ret = data_ret; | |
864 | goto error; | |
865 | } | |
866 | ||
867 | /* | |
9ae110e2 JG |
868 | * Data sleep time before retrying (in usec). Don't sleep if the |
869 | * call returned value indicates availability. | |
38ee087f | 870 | */ |
6d805429 | 871 | if (data_ret) { |
c8f61fd4 | 872 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 873 | } |
6d805429 | 874 | } while (data_ret != 0); |
38ee087f | 875 | |
38ee087f DG |
876 | end: |
877 | error: | |
878 | return ret; | |
879 | } | |
880 | ||
881 | /* | |
882 | * Stop tracing and wait for data availability. | |
883 | */ | |
884 | int lttng_stop_tracing(const char *session_name) | |
885 | { | |
886 | return _lttng_stop_tracing(session_name, 1); | |
887 | } | |
888 | ||
889 | /* | |
890 | * Stop tracing but _don't_ wait for data availability. | |
891 | */ | |
892 | int lttng_stop_tracing_no_wait(const char *session_name) | |
893 | { | |
894 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
895 | } |
896 | ||
897 | /* | |
601d5acf DG |
898 | * Add context to a channel. |
899 | * | |
900 | * If the given channel is NULL, add the contexts to all channels. | |
901 | * The event_name param is ignored. | |
af87c45a DG |
902 | * |
903 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 904 | */ |
cd80958d | 905 | int lttng_add_context(struct lttng_handle *handle, |
28ab034a JG |
906 | struct lttng_event_context *ctx, |
907 | const char *event_name __attribute__((unused)), | |
908 | const char *channel_name) | |
d65106b1 | 909 | { |
2001793c | 910 | int ret; |
1c9a0b0e | 911 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 912 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_ADD_CONTEXT, |
1c9a0b0e MJ |
913 | .session = {}, |
914 | .domain = {}, | |
915 | .u = {}, | |
916 | .fd_count = 0, | |
917 | }; | |
26e1c61f JR |
918 | struct lttng_payload payload; |
919 | ||
920 | lttng_payload_init(&payload); | |
cd80958d | 921 | |
9ae110e2 | 922 | /* Safety check. Both are mandatory. */ |
cd9adb8b | 923 | if (handle == nullptr || ctx == nullptr) { |
2001793c JG |
924 | ret = -LTTNG_ERR_INVALID; |
925 | goto end; | |
cd80958d DG |
926 | } |
927 | ||
26e1c61f JR |
928 | ret = lttng_dynamic_buffer_set_size(&payload.buffer, sizeof(lsm)); |
929 | if (ret) { | |
930 | ret = -LTTNG_ERR_NOMEM; | |
931 | goto end; | |
932 | } | |
cd80958d | 933 | |
85076754 | 934 | /* If no channel name, send empty string. */ |
28ab034a JG |
935 | ret = lttng_strncpy( |
936 | lsm.u.context.channel_name, channel_name ?: "", sizeof(lsm.u.context.channel_name)); | |
e1b624d0 JG |
937 | if (ret) { |
938 | ret = -LTTNG_ERR_INVALID; | |
939 | goto end; | |
85076754 | 940 | } |
cd80958d | 941 | |
60160d2a | 942 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
28ab034a | 943 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
944 | if (ret) { |
945 | ret = -LTTNG_ERR_INVALID; | |
946 | goto end; | |
947 | } | |
cd80958d | 948 | |
26e1c61f JR |
949 | ret = lttng_event_context_serialize(ctx, &payload); |
950 | if (ret) { | |
951 | ret = -LTTNG_ERR_INVALID; | |
952 | goto end; | |
953 | } | |
2001793c | 954 | |
26e1c61f | 955 | lsm.u.context.length = payload.buffer.size - sizeof(lsm); |
2001793c | 956 | |
26e1c61f JR |
957 | /* Update message header. */ |
958 | memcpy(payload.buffer.data, &lsm, sizeof(lsm)); | |
2001793c | 959 | |
26e1c61f JR |
960 | { |
961 | struct lttng_payload reply; | |
962 | struct lttng_payload_view payload_view = | |
28ab034a | 963 | lttng_payload_view_from_payload(&payload, 0, -1); |
2001793c | 964 | |
26e1c61f JR |
965 | lttng_payload_init(&reply); |
966 | ret = lttng_ctl_ask_sessiond_payload(&payload_view, &reply); | |
967 | lttng_payload_reset(&reply); | |
968 | if (ret) { | |
2001793c JG |
969 | goto end; |
970 | } | |
2001793c | 971 | } |
46f44e2a | 972 | |
2001793c | 973 | end: |
26e1c61f | 974 | lttng_payload_reset(&payload); |
2001793c | 975 | return ret; |
d65106b1 DG |
976 | } |
977 | ||
f3ed775e | 978 | /* |
9ae110e2 JG |
979 | * Enable event(s) for a channel. |
980 | * | |
981 | * If no event name is specified, all events are enabled. | |
982 | * If no channel name is specified, the default 'channel0' is used. | |
983 | * | |
984 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 985 | */ |
cd80958d | 986 | int lttng_enable_event(struct lttng_handle *handle, |
28ab034a JG |
987 | struct lttng_event *ev, |
988 | const char *channel_name) | |
1df4dedd | 989 | { |
cd9adb8b | 990 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, nullptr, 0, nullptr); |
1df4dedd DG |
991 | } |
992 | ||
53a80697 | 993 | /* |
025faf73 | 994 | * Create or enable an event with a filter expression. |
178191b3 | 995 | * |
53a80697 MD |
996 | * Return negative error value on error. |
997 | * Return size of returned session payload data if OK. | |
998 | */ | |
025faf73 | 999 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
28ab034a JG |
1000 | struct lttng_event *event, |
1001 | const char *channel_name, | |
1002 | const char *filter_expression) | |
53a80697 | 1003 | { |
28ab034a | 1004 | return lttng_enable_event_with_exclusions( |
cd9adb8b | 1005 | handle, event, channel_name, filter_expression, 0, nullptr); |
53a80697 MD |
1006 | } |
1007 | ||
347c5ab5 | 1008 | /* |
0e115563 | 1009 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1010 | * NULL if not applicable. |
1011 | * | |
1012 | * An event with NO loglevel and the name is * will return NULL. | |
1013 | */ | |
0e115563 | 1014 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1015 | { |
1016 | int err; | |
cd9adb8b | 1017 | char *agent_filter = nullptr; |
347c5ab5 | 1018 | |
a0377dfe | 1019 | LTTNG_ASSERT(ev); |
347c5ab5 DG |
1020 | |
1021 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1022 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1023 | if (filter) { |
28ab034a JG |
1024 | err = asprintf( |
1025 | &agent_filter, "(%s) && (logger_name == \"%s\")", filter, ev->name); | |
347c5ab5 | 1026 | } else { |
0e115563 | 1027 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1028 | } |
1029 | if (err < 0) { | |
1030 | PERROR("asprintf"); | |
6a556f7b | 1031 | goto error; |
347c5ab5 DG |
1032 | } |
1033 | } | |
1034 | ||
1035 | /* Add loglevel filtering if any for the JUL domain. */ | |
1036 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1037 | const char *op; |
347c5ab5 DG |
1038 | |
1039 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1040 | op = ">="; | |
1041 | } else { | |
1042 | op = "=="; | |
1043 | } | |
1044 | ||
0e115563 | 1045 | if (filter || agent_filter) { |
6a556f7b JG |
1046 | char *new_filter; |
1047 | ||
28ab034a JG |
1048 | err = asprintf(&new_filter, |
1049 | "(%s) && (int_loglevel %s %d)", | |
1050 | agent_filter ? agent_filter : filter, | |
1051 | op, | |
1052 | ev->loglevel); | |
0e115563 DG |
1053 | if (agent_filter) { |
1054 | free(agent_filter); | |
6a556f7b | 1055 | } |
0e115563 | 1056 | agent_filter = new_filter; |
347c5ab5 | 1057 | } else { |
28ab034a | 1058 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, ev->loglevel); |
347c5ab5 DG |
1059 | } |
1060 | if (err < 0) { | |
1061 | PERROR("asprintf"); | |
6a556f7b | 1062 | goto error; |
347c5ab5 DG |
1063 | } |
1064 | } | |
1065 | ||
0e115563 | 1066 | return agent_filter; |
6a556f7b | 1067 | error: |
0e115563 | 1068 | free(agent_filter); |
cd9adb8b | 1069 | return nullptr; |
347c5ab5 DG |
1070 | } |
1071 | ||
93deb080 JI |
1072 | /* |
1073 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1074 | * If no event name is specified, all events are enabled. | |
1075 | * If no channel name is specified, the default name is used. | |
1076 | * If filter expression is not NULL, the filter is set for the event. | |
1077 | * If exclusion count is not zero, the exclusions are set for the event. | |
1078 | * Returns size of returned session payload data or a negative error code. | |
1079 | */ | |
1080 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
28ab034a JG |
1081 | struct lttng_event *ev, |
1082 | const char *channel_name, | |
1083 | const char *original_filter_expression, | |
1084 | int exclusion_count, | |
1085 | char **exclusion_list) | |
93deb080 | 1086 | { |
1c9a0b0e | 1087 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 1088 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_ENABLE_EVENT, |
1c9a0b0e MJ |
1089 | .session = {}, |
1090 | .domain = {}, | |
1091 | .u = {}, | |
1092 | .fd_count = 0, | |
1093 | }; | |
e368fb43 | 1094 | struct lttng_payload payload; |
8ddd72ef | 1095 | int ret = 0; |
137b9942 | 1096 | unsigned int free_filter_expression = 0; |
cd9adb8b | 1097 | struct filter_parser_ctx *ctx = nullptr; |
8ddd72ef | 1098 | size_t bytecode_len = 0; |
ec005ec6 | 1099 | |
6a0838b7 YL |
1100 | /* |
1101 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1102 | * a variable-length payload from where to send the data. |
6a0838b7 | 1103 | */ |
e368fb43 | 1104 | lttng_payload_init(&payload); |
ec005ec6 | 1105 | |
e9efbcd3 JG |
1106 | /* |
1107 | * Cast as non-const since we may replace the filter expression | |
1108 | * by a dynamically allocated string. Otherwise, the original | |
1109 | * string is not modified. | |
1110 | */ | |
1111 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 | 1112 | |
cd9adb8b | 1113 | if (handle == nullptr || ev == nullptr) { |
137b9942 DG |
1114 | ret = -LTTNG_ERR_INVALID; |
1115 | goto error; | |
93deb080 JI |
1116 | } |
1117 | ||
9ae110e2 JG |
1118 | /* |
1119 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1120 | * anyway, so treat this corner-case early to eliminate |
1121 | * lttng_fmemopen error for 0-byte allocation. | |
1122 | */ | |
1123 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1124 | ret = -LTTNG_ERR_INVALID; |
1125 | goto error; | |
93deb080 JI |
1126 | } |
1127 | ||
18a720cd | 1128 | if (ev->name[0] == '\0') { |
e1b624d0 JG |
1129 | /* Enable all events. */ |
1130 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
a0377dfe | 1131 | LTTNG_ASSERT(ret == 0); |
6565421f | 1132 | } |
93deb080 | 1133 | |
9ae110e2 | 1134 | /* Parse filter expression. */ |
cd9adb8b | 1135 | if (filter_expression != nullptr || handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a JG |
1136 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1137 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1138 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a JG |
1139 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1140 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
0e115563 | 1141 | char *agent_filter; |
64226865 | 1142 | |
8ddd72ef | 1143 | /* Setup agent filter if needed. */ |
0e115563 DG |
1144 | agent_filter = set_agent_filter(filter_expression, ev); |
1145 | if (!agent_filter) { | |
137b9942 | 1146 | if (!filter_expression) { |
9ae110e2 JG |
1147 | /* |
1148 | * No JUL and no filter, just skip | |
1149 | * everything below. | |
1150 | */ | |
8ddd72ef | 1151 | goto serialize; |
137b9942 | 1152 | } |
64226865 DG |
1153 | } else { |
1154 | /* | |
9ae110e2 JG |
1155 | * With an agent filter, the original filter has |
1156 | * been added to it thus replace the filter | |
1157 | * expression. | |
64226865 | 1158 | */ |
0e115563 | 1159 | filter_expression = agent_filter; |
e9efbcd3 | 1160 | free_filter_expression = 1; |
9b21e6d5 | 1161 | } |
9b21e6d5 | 1162 | } |
93deb080 | 1163 | |
28ab034a | 1164 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == LTTNG_FILTER_MAX_LEN) { |
8ddd72ef JR |
1165 | ret = -LTTNG_ERR_FILTER_INVAL; |
1166 | goto error; | |
1167 | } | |
1168 | ||
e4d2f27a | 1169 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1170 | if (ret) { |
8ddd72ef | 1171 | goto error; |
93deb080 | 1172 | } |
e4d2f27a | 1173 | |
28ab034a | 1174 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + sizeof(ctx->bytecode->b); |
8ddd72ef JR |
1175 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { |
1176 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1177 | goto error; | |
1178 | } | |
6b453b5e JG |
1179 | } |
1180 | ||
8ddd72ef | 1181 | serialize: |
28ab034a JG |
1182 | ret = lttng_event_serialize(ev, |
1183 | exclusion_count, | |
1e0019bb | 1184 | exclusion_list, |
28ab034a JG |
1185 | filter_expression, |
1186 | bytecode_len, | |
cd9adb8b | 1187 | (ctx && bytecode_len) ? &ctx->bytecode->b : nullptr, |
28ab034a | 1188 | &payload); |
15e37663 | 1189 | if (ret) { |
8ddd72ef JR |
1190 | ret = -LTTNG_ERR_INVALID; |
1191 | goto error; | |
6b453b5e | 1192 | } |
137b9942 | 1193 | |
8ddd72ef | 1194 | /* If no channel name, send empty string. */ |
28ab034a JG |
1195 | ret = lttng_strncpy( |
1196 | lsm.u.enable.channel_name, channel_name ?: "", sizeof(lsm.u.enable.channel_name)); | |
8ddd72ef JR |
1197 | if (ret) { |
1198 | ret = -LTTNG_ERR_INVALID; | |
1199 | goto error; | |
6b453b5e | 1200 | } |
15e37663 | 1201 | |
8ddd72ef JR |
1202 | /* Domain */ |
1203 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
15e37663 | 1204 | |
8ddd72ef | 1205 | /* Session name */ |
28ab034a | 1206 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
8ddd72ef JR |
1207 | if (ret) { |
1208 | ret = -LTTNG_ERR_INVALID; | |
1209 | goto error; | |
93deb080 JI |
1210 | } |
1211 | ||
8ddd72ef JR |
1212 | /* Length of the serialized event. */ |
1213 | lsm.u.enable.length = (uint32_t) payload.buffer.size; | |
1214 | ||
e368fb43 | 1215 | { |
28ab034a | 1216 | struct lttng_payload_view view = lttng_payload_view_from_payload(&payload, 0, -1); |
fe489250 | 1217 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1218 | int fd_to_send; |
1219 | ||
1220 | if (fd_count < 0) { | |
8ddd72ef | 1221 | goto error; |
e368fb43 JG |
1222 | } |
1223 | ||
a0377dfe | 1224 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); |
e368fb43 | 1225 | if (fd_count == 1) { |
28ab034a | 1226 | struct fd_handle *h = lttng_payload_view_pop_fd_handle(&view); |
fe489250 | 1227 | |
e2fc8e9d | 1228 | if (!h) { |
8ddd72ef | 1229 | goto error; |
e368fb43 JG |
1230 | } |
1231 | ||
e2fc8e9d SM |
1232 | fd_to_send = fd_handle_get_fd(h); |
1233 | fd_handle_put(h); | |
e368fb43 JG |
1234 | } |
1235 | ||
8ddd72ef JR |
1236 | lsm.fd_count = fd_count; |
1237 | ||
e368fb43 | 1238 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
cd9adb8b | 1239 | fd_count ? &fd_to_send : nullptr, |
28ab034a | 1240 | fd_count, |
cd9adb8b JG |
1241 | view.buffer.size ? view.buffer.data : |
1242 | nullptr, | |
28ab034a | 1243 | view.buffer.size, |
cd9adb8b JG |
1244 | nullptr, |
1245 | nullptr, | |
1246 | nullptr); | |
e368fb43 | 1247 | } |
93deb080 | 1248 | |
8ddd72ef | 1249 | error: |
7ca1dc6f | 1250 | if (filter_expression && ctx) { |
93deb080 JI |
1251 | filter_bytecode_free(ctx); |
1252 | filter_ir_free(ctx); | |
1253 | filter_parser_ctx_free(ctx); | |
7ca1dc6f | 1254 | } |
7ca1dc6f DG |
1255 | if (free_filter_expression) { |
1256 | /* | |
9ae110e2 JG |
1257 | * The filter expression has been replaced and must be freed as |
1258 | * it is not the original filter expression received as a | |
1259 | * parameter. | |
7ca1dc6f DG |
1260 | */ |
1261 | free(filter_expression); | |
93deb080 | 1262 | } |
137b9942 | 1263 | /* |
9ae110e2 JG |
1264 | * Return directly to the caller and don't ask the sessiond since |
1265 | * something went wrong in the parsing of data above. | |
137b9942 | 1266 | */ |
e368fb43 | 1267 | lttng_payload_reset(&payload); |
93deb080 JI |
1268 | return ret; |
1269 | } | |
1270 | ||
6e911cad | 1271 | int lttng_disable_event_ext(struct lttng_handle *handle, |
28ab034a JG |
1272 | struct lttng_event *ev, |
1273 | const char *channel_name, | |
1274 | const char *original_filter_expression) | |
1df4dedd | 1275 | { |
1c9a0b0e | 1276 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 1277 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_DISABLE_EVENT, |
1c9a0b0e MJ |
1278 | .session = {}, |
1279 | .domain = {}, | |
1280 | .u = {}, | |
1281 | .fd_count = 0, | |
1282 | }; | |
8ddd72ef | 1283 | struct lttng_payload payload; |
6e911cad MD |
1284 | int ret = 0; |
1285 | unsigned int free_filter_expression = 0; | |
cd9adb8b | 1286 | struct filter_parser_ctx *ctx = nullptr; |
8ddd72ef JR |
1287 | size_t bytecode_len = 0; |
1288 | ||
1289 | /* | |
1290 | * We have either a filter or some exclusions, so we need to set up | |
1291 | * a variable-length payload from where to send the data. | |
1292 | */ | |
1293 | lttng_payload_init(&payload); | |
1294 | ||
6e911cad MD |
1295 | /* |
1296 | * Cast as non-const since we may replace the filter expression | |
1297 | * by a dynamically allocated string. Otherwise, the original | |
1298 | * string is not modified. | |
1299 | */ | |
1300 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1301 | |
cd9adb8b | 1302 | if (handle == nullptr || ev == nullptr) { |
6e911cad MD |
1303 | ret = -LTTNG_ERR_INVALID; |
1304 | goto error; | |
1305 | } | |
1306 | ||
9ae110e2 JG |
1307 | /* |
1308 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1309 | * anyway, so treat this corner-case early to eliminate |
1310 | * lttng_fmemopen error for 0-byte allocation. | |
1311 | */ | |
1312 | if (filter_expression && filter_expression[0] == '\0') { | |
1313 | ret = -LTTNG_ERR_INVALID; | |
1314 | goto error; | |
cd80958d DG |
1315 | } |
1316 | ||
8ddd72ef | 1317 | /* Parse filter expression. */ |
cd9adb8b | 1318 | if (filter_expression != nullptr || handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a JG |
1319 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1320 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1321 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a JG |
1322 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1323 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
0e115563 | 1324 | char *agent_filter; |
6e911cad | 1325 | |
8ddd72ef | 1326 | /* Setup agent filter if needed. */ |
0e115563 DG |
1327 | agent_filter = set_agent_filter(filter_expression, ev); |
1328 | if (!agent_filter) { | |
6e911cad | 1329 | if (!filter_expression) { |
9ae110e2 JG |
1330 | /* |
1331 | * No JUL and no filter, just skip | |
1332 | * everything below. | |
1333 | */ | |
8ddd72ef | 1334 | goto serialize; |
6e911cad MD |
1335 | } |
1336 | } else { | |
1337 | /* | |
8ddd72ef | 1338 | * With an agent filter, the original filter has |
9ae110e2 JG |
1339 | * been added to it thus replace the filter |
1340 | * expression. | |
6e911cad | 1341 | */ |
0e115563 | 1342 | filter_expression = agent_filter; |
6e911cad MD |
1343 | free_filter_expression = 1; |
1344 | } | |
1345 | } | |
1346 | ||
28ab034a | 1347 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == LTTNG_FILTER_MAX_LEN) { |
8ddd72ef JR |
1348 | ret = -LTTNG_ERR_FILTER_INVAL; |
1349 | goto error; | |
1350 | } | |
1351 | ||
e4d2f27a | 1352 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad | 1353 | if (ret) { |
8ddd72ef | 1354 | goto error; |
6e911cad | 1355 | } |
e4d2f27a | 1356 | |
28ab034a | 1357 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + sizeof(ctx->bytecode->b); |
8ddd72ef JR |
1358 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { |
1359 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1360 | goto error; | |
1361 | } | |
6e911cad MD |
1362 | } |
1363 | ||
8ddd72ef | 1364 | serialize: |
28ab034a JG |
1365 | ret = lttng_event_serialize(ev, |
1366 | 0, | |
cd9adb8b | 1367 | nullptr, |
28ab034a JG |
1368 | filter_expression, |
1369 | bytecode_len, | |
cd9adb8b | 1370 | (ctx && bytecode_len) ? &ctx->bytecode->b : nullptr, |
28ab034a | 1371 | &payload); |
8ddd72ef JR |
1372 | if (ret) { |
1373 | ret = -LTTNG_ERR_INVALID; | |
1374 | goto error; | |
6e911cad MD |
1375 | } |
1376 | ||
8ddd72ef | 1377 | /* If no channel name, send empty string. */ |
28ab034a JG |
1378 | ret = lttng_strncpy( |
1379 | lsm.u.disable.channel_name, channel_name ?: "", sizeof(lsm.u.disable.channel_name)); | |
8ddd72ef JR |
1380 | if (ret) { |
1381 | ret = -LTTNG_ERR_INVALID; | |
1382 | goto error; | |
6e911cad | 1383 | } |
8ddd72ef JR |
1384 | |
1385 | /* Domain */ | |
1386 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1387 | ||
1388 | /* Session name */ | |
28ab034a | 1389 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
8ddd72ef JR |
1390 | if (ret) { |
1391 | ret = -LTTNG_ERR_INVALID; | |
1392 | goto error; | |
6e911cad MD |
1393 | } |
1394 | ||
8ddd72ef JR |
1395 | /* Length of the serialized event. */ |
1396 | lsm.u.disable.length = (uint32_t) payload.buffer.size; | |
1397 | ||
1398 | { | |
28ab034a | 1399 | struct lttng_payload_view view = lttng_payload_view_from_payload(&payload, 0, -1); |
8ddd72ef JR |
1400 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
1401 | int fd_to_send; | |
1402 | ||
1403 | if (fd_count < 0) { | |
1404 | goto error; | |
1405 | } | |
1406 | ||
1407 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); | |
1408 | if (fd_count == 1) { | |
28ab034a | 1409 | struct fd_handle *h = lttng_payload_view_pop_fd_handle(&view); |
6e911cad | 1410 | |
8ddd72ef JR |
1411 | if (!h) { |
1412 | goto error; | |
1413 | } | |
1414 | ||
1415 | fd_to_send = fd_handle_get_fd(h); | |
1416 | fd_handle_put(h); | |
1417 | } | |
1418 | ||
1419 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
cd9adb8b | 1420 | fd_count ? &fd_to_send : nullptr, |
28ab034a | 1421 | fd_count, |
cd9adb8b JG |
1422 | view.buffer.size ? view.buffer.data : |
1423 | nullptr, | |
28ab034a | 1424 | view.buffer.size, |
cd9adb8b JG |
1425 | nullptr, |
1426 | nullptr, | |
1427 | nullptr); | |
8ddd72ef JR |
1428 | } |
1429 | ||
1430 | error: | |
6e911cad MD |
1431 | if (filter_expression && ctx) { |
1432 | filter_bytecode_free(ctx); | |
1433 | filter_ir_free(ctx); | |
1434 | filter_parser_ctx_free(ctx); | |
1435 | } | |
6e911cad MD |
1436 | if (free_filter_expression) { |
1437 | /* | |
9ae110e2 JG |
1438 | * The filter expression has been replaced and must be freed as |
1439 | * it is not the original filter expression received as a | |
1440 | * parameter. | |
6e911cad MD |
1441 | */ |
1442 | free(filter_expression); | |
1443 | } | |
6e911cad | 1444 | /* |
9ae110e2 JG |
1445 | * Return directly to the caller and don't ask the sessiond since |
1446 | * something went wrong in the parsing of data above. | |
6e911cad | 1447 | */ |
8ddd72ef | 1448 | lttng_payload_reset(&payload); |
6e911cad MD |
1449 | return ret; |
1450 | } | |
1451 | ||
1452 | /* | |
9ae110e2 JG |
1453 | * Disable event(s) of a channel and domain. |
1454 | * If no event name is specified, all events are disabled. | |
1455 | * If no channel name is specified, the default 'channel0' is used. | |
1456 | * Returns size of returned session payload data or a negative error code. | |
6e911cad | 1457 | */ |
28ab034a | 1458 | int lttng_disable_event(struct lttng_handle *handle, const char *name, const char *channel_name) |
6e911cad | 1459 | { |
e1b624d0 | 1460 | int ret; |
6e911cad MD |
1461 | struct lttng_event ev; |
1462 | ||
1463 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1464 | ev.loglevel = -1; |
6e911cad | 1465 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1466 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1467 | if (ret) { | |
1468 | ret = -LTTNG_ERR_INVALID; | |
1469 | goto end; | |
1470 | } | |
1471 | ||
cd9adb8b | 1472 | ret = lttng_disable_event_ext(handle, &ev, channel_name, nullptr); |
e1b624d0 JG |
1473 | end: |
1474 | return ret; | |
1df4dedd DG |
1475 | } |
1476 | ||
cf0bcb51 JG |
1477 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1478 | { | |
cd9adb8b | 1479 | struct lttng_channel *channel = nullptr; |
cf0bcb51 JG |
1480 | |
1481 | if (!domain) { | |
999af9c1 | 1482 | goto end; |
cf0bcb51 JG |
1483 | } |
1484 | ||
1485 | /* Validate domain. */ | |
1486 | switch (domain->type) { | |
1487 | case LTTNG_DOMAIN_UST: | |
1488 | switch (domain->buf_type) { | |
1489 | case LTTNG_BUFFER_PER_UID: | |
1490 | case LTTNG_BUFFER_PER_PID: | |
1491 | break; | |
1492 | default: | |
999af9c1 | 1493 | goto end; |
cf0bcb51 JG |
1494 | } |
1495 | break; | |
1496 | case LTTNG_DOMAIN_KERNEL: | |
1497 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
999af9c1 | 1498 | goto end; |
cf0bcb51 JG |
1499 | } |
1500 | break; | |
1501 | default: | |
999af9c1 | 1502 | goto end; |
cf0bcb51 JG |
1503 | } |
1504 | ||
999af9c1 | 1505 | channel = lttng_channel_create_internal(); |
cf0bcb51 | 1506 | if (!channel) { |
999af9c1 | 1507 | goto end; |
cf0bcb51 JG |
1508 | } |
1509 | ||
cf0bcb51 | 1510 | lttng_channel_set_default_attr(domain, &channel->attr); |
999af9c1 | 1511 | end: |
cf0bcb51 | 1512 | return channel; |
cf0bcb51 JG |
1513 | } |
1514 | ||
1515 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1516 | { | |
1517 | if (!channel) { | |
1518 | return; | |
1519 | } | |
1520 | ||
1521 | if (channel->attr.extended.ptr) { | |
1522 | free(channel->attr.extended.ptr); | |
1523 | } | |
1524 | free(channel); | |
1525 | } | |
1526 | ||
1df4dedd | 1527 | /* |
9ae110e2 JG |
1528 | * Enable channel per domain |
1529 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1530 | */ |
28ab034a | 1531 | int lttng_enable_channel(struct lttng_handle *handle, struct lttng_channel *in_chan) |
a5c5a2bd | 1532 | { |
13dd7782 | 1533 | enum lttng_error_code ret_code; |
e1b624d0 | 1534 | int ret; |
999af9c1 | 1535 | struct lttng_dynamic_buffer buffer; |
cd80958d | 1536 | struct lttcomm_session_msg lsm; |
13dd7782 | 1537 | uint64_t total_buffer_size_needed_per_cpu = 0; |
cd9adb8b | 1538 | struct lttng_channel *channel = nullptr; |
999af9c1 JR |
1539 | |
1540 | lttng_dynamic_buffer_init(&buffer); | |
cd80958d | 1541 | |
9ae110e2 | 1542 | /* NULL arguments are forbidden. No default values. */ |
cd9adb8b | 1543 | if (handle == nullptr || in_chan == nullptr) { |
999af9c1 JR |
1544 | ret = -LTTNG_ERR_INVALID; |
1545 | goto end; | |
cf0bcb51 | 1546 | } |
cd80958d | 1547 | |
09b72f7a FD |
1548 | /* |
1549 | * Verify that the amount of memory required to create the requested | |
1550 | * buffer is available on the system at the moment. | |
1551 | */ | |
28ab034a | 1552 | if (in_chan->attr.num_subbuf > UINT64_MAX / in_chan->attr.subbuf_size) { |
13dd7782 JR |
1553 | /* Overflow */ |
1554 | ret = -LTTNG_ERR_OVERFLOW; | |
1555 | goto end; | |
1556 | } | |
1557 | ||
28ab034a JG |
1558 | total_buffer_size_needed_per_cpu = in_chan->attr.num_subbuf * in_chan->attr.subbuf_size; |
1559 | ret_code = check_enough_available_memory(total_buffer_size_needed_per_cpu); | |
13dd7782 JR |
1560 | if (ret_code != LTTNG_OK) { |
1561 | ret = -ret_code; | |
1562 | goto end; | |
09b72f7a FD |
1563 | } |
1564 | ||
999af9c1 JR |
1565 | /* Copy the channel for easier manipulation. */ |
1566 | channel = lttng_channel_copy(in_chan); | |
1567 | if (!channel) { | |
1568 | ret = -LTTNG_ERR_NOMEM; | |
1569 | goto end; | |
1570 | } | |
1571 | ||
1572 | /* Populate the channel extended attribute if necessary. */ | |
1573 | if (!channel->attr.extended.ptr) { | |
28ab034a | 1574 | struct lttng_channel_extended *extended = zmalloc<lttng_channel_extended>(); |
999af9c1 JR |
1575 | |
1576 | if (!extended) { | |
1577 | ret = -LTTNG_ERR_NOMEM; | |
1578 | goto end; | |
1579 | } | |
64803277 | 1580 | |
28ab034a | 1581 | lttng_channel_set_default_extended_attr(&handle->domain, extended); |
999af9c1 JR |
1582 | channel->attr.extended.ptr = extended; |
1583 | } | |
1584 | ||
1585 | /* Prepare the payload */ | |
1586 | memset(&lsm, 0, sizeof(lsm)); | |
1587 | ||
37a5ef39 | 1588 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_ENABLE_CHANNEL; |
60160d2a | 1589 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1590 | |
28ab034a | 1591 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
1592 | if (ret) { |
1593 | ret = -LTTNG_ERR_INVALID; | |
1594 | goto end; | |
1595 | } | |
cd80958d | 1596 | |
999af9c1 JR |
1597 | ret = lttng_channel_serialize(channel, &buffer); |
1598 | if (ret) { | |
1599 | ret = -LTTNG_ERR_FATAL; | |
1600 | goto end; | |
1601 | } | |
1602 | ||
1603 | lsm.u.channel.length = buffer.size; | |
1604 | ||
cd9adb8b | 1605 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, buffer.size, nullptr); |
e1b624d0 | 1606 | end: |
999af9c1 JR |
1607 | lttng_channel_destroy(channel); |
1608 | lttng_dynamic_buffer_reset(&buffer); | |
e1b624d0 | 1609 | return ret; |
8c0faa1d | 1610 | } |
1df4dedd | 1611 | |
2ef84c95 | 1612 | /* |
9ae110e2 JG |
1613 | * All tracing will be stopped for registered events of the channel. |
1614 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1615 | */ |
cd80958d | 1616 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1617 | { |
e1b624d0 | 1618 | int ret; |
cd80958d DG |
1619 | struct lttcomm_session_msg lsm; |
1620 | ||
9ae110e2 | 1621 | /* Safety check. Both are mandatory. */ |
cd9adb8b | 1622 | if (handle == nullptr || name == nullptr) { |
2f70b271 | 1623 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1624 | } |
1625 | ||
441c16a7 MD |
1626 | memset(&lsm, 0, sizeof(lsm)); |
1627 | ||
37a5ef39 | 1628 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_DISABLE_CHANNEL; |
1df4dedd | 1629 | |
28ab034a | 1630 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1631 | if (ret) { |
1632 | ret = -LTTNG_ERR_INVALID; | |
1633 | goto end; | |
1634 | } | |
9d697d3d | 1635 | |
60160d2a | 1636 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1637 | |
28ab034a | 1638 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
1639 | if (ret) { |
1640 | ret = -LTTNG_ERR_INVALID; | |
1641 | goto end; | |
1642 | } | |
cd80958d | 1643 | |
cd9adb8b | 1644 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
e1b624d0 JG |
1645 | end: |
1646 | return ret; | |
ca95a216 DG |
1647 | } |
1648 | ||
fac6795d | 1649 | /* |
9ae110e2 JG |
1650 | * Lists all available tracepoints of domain. |
1651 | * Sets the contents of the events array. | |
1652 | * Returns the number of lttng_event entries in events; | |
1653 | * on error, returns a negative value. | |
fac6795d | 1654 | */ |
28ab034a | 1655 | int lttng_list_tracepoints(struct lttng_handle *handle, struct lttng_event **events) |
fac6795d | 1656 | { |
28ab034a JG |
1657 | enum lttng_error_code ret_code; |
1658 | int ret, total_payload_received; | |
cd9adb8b | 1659 | char *reception_buffer = nullptr; |
28ab034a | 1660 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 1661 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINTS, |
1c9a0b0e MJ |
1662 | .session = {}, |
1663 | .domain = {}, | |
1664 | .u = {}, | |
1665 | .fd_count = 0, | |
1666 | }; | |
cd9adb8b | 1667 | struct lttcomm_list_command_header *cmd_header = nullptr; |
28ab034a JG |
1668 | size_t cmd_header_len; |
1669 | unsigned int nb_events = 0; | |
8ddd72ef | 1670 | |
cd9adb8b | 1671 | if (handle == nullptr) { |
28ab034a JG |
1672 | ret = -LTTNG_ERR_INVALID; |
1673 | goto end; | |
1674 | } | |
8ddd72ef | 1675 | |
28ab034a | 1676 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
8ddd72ef | 1677 | |
28ab034a | 1678 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
cd9adb8b | 1679 | nullptr, |
28ab034a | 1680 | 0, |
cd9adb8b | 1681 | nullptr, |
28ab034a JG |
1682 | 0, |
1683 | (void **) &reception_buffer, | |
1684 | (void **) &cmd_header, | |
1685 | &cmd_header_len); | |
1686 | if (ret < 0) { | |
1687 | goto end; | |
1688 | } | |
8ddd72ef | 1689 | |
28ab034a | 1690 | total_payload_received = ret; |
8ddd72ef | 1691 | |
28ab034a JG |
1692 | if (!cmd_header) { |
1693 | ret = -LTTNG_ERR_UNK; | |
1694 | goto end; | |
1695 | } | |
8ddd72ef | 1696 | |
28ab034a JG |
1697 | if (cmd_header->count > INT_MAX) { |
1698 | ret = -LTTNG_ERR_OVERFLOW; | |
1699 | goto end; | |
1700 | } | |
8ddd72ef | 1701 | |
28ab034a | 1702 | nb_events = (unsigned int) cmd_header->count; |
fac6795d | 1703 | |
8ddd72ef JR |
1704 | { |
1705 | struct lttng_buffer_view events_view = | |
28ab034a | 1706 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); |
8ddd72ef | 1707 | struct lttng_payload_view events_payload_view = |
28ab034a | 1708 | lttng_payload_view_from_buffer_view(&events_view, 0, -1); |
2a71efd5 | 1709 | |
8ddd72ef | 1710 | ret_code = lttng_events_create_and_flatten_from_payload( |
28ab034a | 1711 | &events_payload_view, nb_events, events); |
8ddd72ef JR |
1712 | if (ret_code != LTTNG_OK) { |
1713 | ret = -ret_code; | |
1714 | goto end; | |
1715 | } | |
eb354453 | 1716 | } |
fac6795d | 1717 | |
8ddd72ef JR |
1718 | ret = (int) nb_events; |
1719 | ||
1720 | end: | |
28ab034a JG |
1721 | free(cmd_header); |
1722 | free(reception_buffer); | |
1723 | return ret; | |
fac6795d DG |
1724 | } |
1725 | ||
f37d259d | 1726 | /* |
9ae110e2 JG |
1727 | * Lists all available tracepoint fields of domain. |
1728 | * Sets the contents of the event field array. | |
1729 | * Returns the number of lttng_event_field entries in events; | |
1730 | * on error, returns a negative value. | |
f37d259d | 1731 | */ |
28ab034a | 1732 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, struct lttng_event_field **fields) |
f37d259d | 1733 | { |
b2d68839 | 1734 | enum lttng_error_code ret_code; |
f37d259d MD |
1735 | int ret; |
1736 | struct lttcomm_session_msg lsm; | |
cd9adb8b | 1737 | const struct lttcomm_list_command_header *cmd_header = nullptr; |
b2d68839 JR |
1738 | unsigned int nb_event_fields = 0; |
1739 | struct lttng_payload reply; | |
f37d259d | 1740 | |
5c5c6942 JG |
1741 | lttng_payload_init(&reply); |
1742 | ||
cd9adb8b | 1743 | if (handle == nullptr) { |
b2d68839 JR |
1744 | ret = -LTTNG_ERR_INVALID; |
1745 | goto end; | |
f37d259d MD |
1746 | } |
1747 | ||
53efb85a | 1748 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 1749 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1750 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1751 | |
b2d68839 JR |
1752 | { |
1753 | lttng_payload_view message_view = | |
28ab034a | 1754 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
b2d68839 JR |
1755 | |
1756 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
1757 | if (ret < 0) { | |
1758 | goto end; | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | { | |
28ab034a JG |
1763 | const lttng_buffer_view cmd_header_view = lttng_buffer_view_from_dynamic_buffer( |
1764 | &reply.buffer, 0, sizeof(*cmd_header)); | |
b2d68839 JR |
1765 | |
1766 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { | |
1767 | ret = -LTTNG_ERR_INVALID_PROTOCOL; | |
1768 | goto end; | |
1769 | } | |
1770 | ||
28ab034a | 1771 | cmd_header = (struct lttcomm_list_command_header *) cmd_header_view.data; |
b2d68839 JR |
1772 | } |
1773 | ||
1774 | if (cmd_header->count > INT_MAX) { | |
1775 | ret = -LTTNG_ERR_OVERFLOW; | |
1776 | goto end; | |
f37d259d MD |
1777 | } |
1778 | ||
b2d68839 JR |
1779 | nb_event_fields = cmd_header->count; |
1780 | ||
1781 | { | |
1782 | lttng_payload_view reply_view = | |
28ab034a | 1783 | lttng_payload_view_from_payload(&reply, sizeof(*cmd_header), -1); |
b2d68839 JR |
1784 | |
1785 | ret_code = lttng_event_fields_create_and_flatten_from_payload( | |
28ab034a | 1786 | &reply_view, nb_event_fields, fields); |
b2d68839 JR |
1787 | if (ret_code != LTTNG_OK) { |
1788 | ret = -ret_code; | |
1789 | goto end; | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | ret = nb_event_fields; | |
1794 | ||
1795 | end: | |
5c5c6942 | 1796 | lttng_payload_reset(&reply); |
b2d68839 | 1797 | return ret; |
f37d259d MD |
1798 | } |
1799 | ||
834978fd | 1800 | /* |
9ae110e2 JG |
1801 | * Lists all available kernel system calls. Allocates and sets the contents of |
1802 | * the events array. | |
834978fd | 1803 | * |
9ae110e2 JG |
1804 | * Returns the number of lttng_event entries in events; on error, returns a |
1805 | * negative value. | |
834978fd DG |
1806 | */ |
1807 | int lttng_list_syscalls(struct lttng_event **events) | |
1808 | { | |
28ab034a JG |
1809 | enum lttng_error_code ret_code; |
1810 | int ret, total_payload_received; | |
cd9adb8b | 1811 | char *reception_buffer = nullptr; |
28ab034a | 1812 | struct lttcomm_session_msg lsm = {}; |
cd9adb8b | 1813 | struct lttcomm_list_command_header *cmd_header = nullptr; |
28ab034a JG |
1814 | size_t cmd_header_len; |
1815 | uint32_t nb_events = 0; | |
1816 | ||
1817 | if (!events) { | |
1818 | ret = -LTTNG_ERR_INVALID; | |
1819 | goto end; | |
1820 | } | |
1821 | ||
1822 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_SYSCALLS; | |
1823 | /* Force kernel domain for system calls. */ | |
1824 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1825 | ||
1826 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
cd9adb8b | 1827 | nullptr, |
28ab034a | 1828 | 0, |
cd9adb8b | 1829 | nullptr, |
28ab034a JG |
1830 | 0, |
1831 | (void **) &reception_buffer, | |
1832 | (void **) &cmd_header, | |
1833 | &cmd_header_len); | |
1834 | if (ret < 0) { | |
1835 | goto end; | |
1836 | } | |
1837 | total_payload_received = ret; | |
1838 | ||
1839 | if (!cmd_header) { | |
1840 | ret = -LTTNG_ERR_UNK; | |
1841 | goto end; | |
1842 | } | |
1843 | ||
1844 | if (cmd_header->count > INT_MAX) { | |
1845 | ret = -LTTNG_ERR_OVERFLOW; | |
1846 | goto end; | |
1847 | } | |
1848 | ||
1849 | nb_events = (unsigned int) cmd_header->count; | |
1850 | ||
1851 | { | |
1852 | const struct lttng_buffer_view events_view = | |
1853 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); | |
8ddd72ef | 1854 | struct lttng_payload_view events_payload_view = |
28ab034a | 1855 | lttng_payload_view_from_buffer_view(&events_view, 0, -1); |
8ddd72ef | 1856 | |
28ab034a JG |
1857 | ret_code = lttng_events_create_and_flatten_from_payload( |
1858 | &events_payload_view, nb_events, events); | |
1859 | if (ret_code != LTTNG_OK) { | |
1860 | ret = -ret_code; | |
1861 | goto end; | |
1862 | } | |
1863 | } | |
8ddd72ef | 1864 | |
28ab034a | 1865 | ret = (int) nb_events; |
834978fd | 1866 | |
8ddd72ef | 1867 | end: |
28ab034a JG |
1868 | free(reception_buffer); |
1869 | free(cmd_header); | |
1870 | return ret; | |
834978fd DG |
1871 | } |
1872 | ||
1657e9bb | 1873 | /* |
9ae110e2 | 1874 | * Returns a human readable string describing |
8346beb6 | 1875 | * the error code (positive or negative value). |
1657e9bb | 1876 | */ |
9a745bc7 | 1877 | const char *lttng_strerror(int code) |
1657e9bb | 1878 | { |
8346beb6 PP |
1879 | if (code > 0) { |
1880 | code = -code; | |
1881 | } | |
1882 | ||
f73fabfd | 1883 | return error_get_str(code); |
1657e9bb DG |
1884 | } |
1885 | ||
28ab034a | 1886 | enum lttng_error_code lttng_create_session_ext(struct lttng_session_descriptor *session_descriptor) |
b178f53e JG |
1887 | { |
1888 | enum lttng_error_code ret_code; | |
1889 | struct lttcomm_session_msg lsm = { | |
37a5ef39 | 1890 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_CREATE_SESSION_EXT, |
1c9a0b0e MJ |
1891 | .session = {}, |
1892 | .domain = {}, | |
1893 | .u = {}, | |
1894 | .fd_count = 0, | |
b178f53e | 1895 | }; |
cd9adb8b | 1896 | void *reply = nullptr; |
b178f53e JG |
1897 | struct lttng_buffer_view reply_view; |
1898 | int reply_ret; | |
1899 | bool sessiond_must_generate_ouput; | |
1900 | struct lttng_dynamic_buffer payload; | |
1901 | int ret; | |
1902 | size_t descriptor_size; | |
cd9adb8b | 1903 | struct lttng_session_descriptor *descriptor_reply = nullptr; |
b178f53e JG |
1904 | |
1905 | lttng_dynamic_buffer_init(&payload); | |
1906 | if (!session_descriptor) { | |
1907 | ret_code = LTTNG_ERR_INVALID; | |
1908 | goto end; | |
1909 | } | |
1910 | ||
1911 | sessiond_must_generate_ouput = | |
28ab034a | 1912 | !lttng_session_descriptor_is_output_destination_initialized(session_descriptor); |
b178f53e JG |
1913 | if (sessiond_must_generate_ouput) { |
1914 | const char *home_dir = utils_get_home_dir(); | |
1915 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1916 | ||
1917 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1918 | ret_code = LTTNG_ERR_FATAL; | |
1919 | goto end; | |
1920 | } | |
1921 | ||
1922 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
28ab034a | 1923 | ret = lttng_dynamic_buffer_append(&payload, home_dir, home_dir_len); |
b178f53e JG |
1924 | if (ret) { |
1925 | ret_code = LTTNG_ERR_NOMEM; | |
1926 | goto end; | |
1927 | } | |
1928 | } | |
1929 | ||
1930 | descriptor_size = payload.size; | |
28ab034a | 1931 | ret = lttng_session_descriptor_serialize(session_descriptor, &payload); |
b178f53e JG |
1932 | if (ret) { |
1933 | ret_code = LTTNG_ERR_INVALID; | |
1934 | goto end; | |
1935 | } | |
1936 | descriptor_size = payload.size - descriptor_size; | |
1937 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1938 | ||
1939 | /* Command returns a session descriptor on success. */ | |
28ab034a JG |
1940 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( |
1941 | &lsm, payload.data, payload.size, &reply); | |
b178f53e | 1942 | if (reply_ret < 0) { |
4bd69c5f | 1943 | ret_code = (lttng_error_code) -reply_ret; |
b178f53e JG |
1944 | goto end; |
1945 | } else if (reply_ret == 0) { | |
1946 | /* Socket unexpectedly closed by the session daemon. */ | |
1947 | ret_code = LTTNG_ERR_FATAL; | |
1948 | goto end; | |
1949 | } | |
1950 | ||
4bd69c5f | 1951 | reply_view = lttng_buffer_view_init((const char *) reply, 0, reply_ret); |
28ab034a | 1952 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, &descriptor_reply); |
b178f53e JG |
1953 | if (ret < 0) { |
1954 | ret_code = LTTNG_ERR_FATAL; | |
1955 | goto end; | |
1956 | } | |
1957 | ret_code = LTTNG_OK; | |
1958 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1959 | end: | |
1960 | free(reply); | |
1961 | lttng_dynamic_buffer_reset(&payload); | |
1962 | lttng_session_descriptor_destroy(descriptor_reply); | |
1963 | return ret_code; | |
1964 | } | |
1965 | ||
aaf97519 | 1966 | /* |
b178f53e | 1967 | * Create a new session using name and url for destination. |
a4b92340 | 1968 | * |
780d4bb8 | 1969 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1970 | */ |
a4b92340 | 1971 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1972 | { |
3dd05a85 | 1973 | int ret; |
a4b92340 | 1974 | ssize_t size; |
cd9adb8b JG |
1975 | struct lttng_uri *uris = nullptr; |
1976 | struct lttng_session_descriptor *descriptor = nullptr; | |
b178f53e | 1977 | enum lttng_error_code ret_code; |
00e2e675 | 1978 | |
b178f53e JG |
1979 | if (!name) { |
1980 | ret = -LTTNG_ERR_INVALID; | |
1981 | goto end; | |
00e2e675 DG |
1982 | } |
1983 | ||
cd9adb8b | 1984 | size = uri_parse_str_urls(url, nullptr, &uris); |
a4b92340 | 1985 | if (size < 0) { |
b178f53e JG |
1986 | ret = -LTTNG_ERR_INVALID; |
1987 | goto end; | |
1988 | } | |
1989 | switch (size) { | |
1990 | case 0: | |
1991 | descriptor = lttng_session_descriptor_create(name); | |
1992 | break; | |
1993 | case 1: | |
1994 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1995 | ret = -LTTNG_ERR_INVALID; | |
1996 | goto end; | |
1997 | } | |
28ab034a | 1998 | descriptor = lttng_session_descriptor_local_create(name, uris[0].dst.path); |
b178f53e JG |
1999 | break; |
2000 | case 2: | |
cd9adb8b | 2001 | descriptor = lttng_session_descriptor_network_create(name, url, nullptr); |
b178f53e JG |
2002 | break; |
2003 | default: | |
2004 | ret = -LTTNG_ERR_INVALID; | |
2005 | goto end; | |
2006 | } | |
2007 | if (!descriptor) { | |
2008 | ret = -LTTNG_ERR_INVALID; | |
2009 | goto end; | |
00e2e675 | 2010 | } |
b178f53e JG |
2011 | ret_code = lttng_create_session_ext(descriptor); |
2012 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2013 | end: | |
2014 | lttng_session_descriptor_destroy(descriptor); | |
2015 | free(uris); | |
2016 | return ret; | |
2017 | } | |
00e2e675 | 2018 | |
b178f53e JG |
2019 | /* |
2020 | * Create a session exclusively used for snapshot. | |
2021 | * | |
780d4bb8 | 2022 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2023 | */ |
2024 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2025 | { | |
2026 | int ret; | |
2027 | enum lttng_error_code ret_code; | |
2028 | ssize_t size; | |
cd9adb8b JG |
2029 | struct lttng_uri *uris = nullptr; |
2030 | struct lttng_session_descriptor *descriptor = nullptr; | |
a4b92340 | 2031 | |
b178f53e JG |
2032 | if (!name) { |
2033 | ret = -LTTNG_ERR_INVALID; | |
2034 | goto end; | |
2035 | } | |
2036 | ||
cd9adb8b | 2037 | size = uri_parse_str_urls(snapshot_url, nullptr, &uris); |
b178f53e JG |
2038 | if (size < 0) { |
2039 | ret = -LTTNG_ERR_INVALID; | |
2040 | goto end; | |
2041 | } | |
2042 | /* | |
2043 | * If the user does not specify a custom subdir, use the session name. | |
2044 | */ | |
28ab034a JG |
2045 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
2046 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
b178f53e JG |
2047 | if (ret < 0) { |
2048 | PERROR("Failed to set session name as network destination sub-directory"); | |
2049 | ret = -LTTNG_ERR_FATAL; | |
2050 | goto end; | |
2051 | } else if (ret >= sizeof(uris[0].subdir)) { | |
2052 | /* Truncated output. */ | |
2053 | ret = -LTTNG_ERR_INVALID; | |
2054 | goto end; | |
2055 | } | |
2056 | } | |
3dd05a85 | 2057 | |
b178f53e JG |
2058 | switch (size) { |
2059 | case 0: | |
2060 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
2061 | break; | |
2062 | case 1: | |
2063 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
2064 | ret = -LTTNG_ERR_INVALID; | |
2065 | goto end; | |
2066 | } | |
28ab034a | 2067 | descriptor = lttng_session_descriptor_snapshot_local_create(name, uris[0].dst.path); |
b178f53e JG |
2068 | break; |
2069 | case 2: | |
cd9adb8b JG |
2070 | descriptor = lttng_session_descriptor_snapshot_network_create( |
2071 | name, snapshot_url, nullptr); | |
b178f53e JG |
2072 | break; |
2073 | default: | |
2074 | ret = -LTTNG_ERR_INVALID; | |
2075 | goto end; | |
2076 | } | |
2077 | if (!descriptor) { | |
2078 | ret = -LTTNG_ERR_INVALID; | |
2079 | goto end; | |
2080 | } | |
2081 | ret_code = lttng_create_session_ext(descriptor); | |
2082 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2083 | end: | |
2084 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
2085 | free(uris); |
2086 | return ret; | |
00e2e675 DG |
2087 | } |
2088 | ||
b178f53e JG |
2089 | /* |
2090 | * Create a session exclusively used for live. | |
2091 | * | |
780d4bb8 | 2092 | * Return 0 on success else a negative LTTng error code. |
b178f53e | 2093 | */ |
28ab034a | 2094 | int lttng_create_session_live(const char *name, const char *url, unsigned int timer_interval) |
b178f53e JG |
2095 | { |
2096 | int ret; | |
2097 | enum lttng_error_code ret_code; | |
cd9adb8b | 2098 | struct lttng_session_descriptor *descriptor = nullptr; |
b178f53e JG |
2099 | |
2100 | if (!name) { | |
2101 | ret = -LTTNG_ERR_INVALID; | |
2102 | goto end; | |
2103 | } | |
2104 | ||
2105 | if (url) { | |
2106 | descriptor = lttng_session_descriptor_live_network_create( | |
cd9adb8b | 2107 | name, url, nullptr, timer_interval); |
b178f53e | 2108 | } else { |
28ab034a | 2109 | descriptor = lttng_session_descriptor_live_create(name, timer_interval); |
b178f53e JG |
2110 | } |
2111 | if (!descriptor) { | |
2112 | ret = -LTTNG_ERR_INVALID; | |
2113 | goto end; | |
2114 | } | |
2115 | ret_code = lttng_create_session_ext(descriptor); | |
2116 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2117 | end: | |
2118 | lttng_session_descriptor_destroy(descriptor); | |
2119 | return ret; | |
2120 | } | |
2121 | ||
e20ee7c2 JD |
2122 | /* |
2123 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2124 | * |
2125 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2126 | */ |
2127 | int lttng_destroy_session(const char *session_name) | |
2128 | { | |
2129 | int ret; | |
3e3665b8 JG |
2130 | enum lttng_error_code ret_code; |
2131 | enum lttng_destruction_handle_status status; | |
cd9adb8b | 2132 | struct lttng_destruction_handle *handle = nullptr; |
e20ee7c2 JD |
2133 | |
2134 | /* | |
3e3665b8 JG |
2135 | * Stop the tracing and wait for the data to be |
2136 | * consumed. | |
e20ee7c2 JD |
2137 | */ |
2138 | ret = _lttng_stop_tracing(session_name, 1); | |
2139 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2140 | goto end; | |
2141 | } | |
2142 | ||
3e3665b8 JG |
2143 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2144 | if (ret_code != LTTNG_OK) { | |
2145 | ret = (int) -ret_code; | |
2146 | goto end; | |
2147 | } | |
a0377dfe | 2148 | LTTNG_ASSERT(handle); |
3e3665b8 JG |
2149 | |
2150 | /* Block until the completion of the destruction of the session. */ | |
2151 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2152 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2153 | ret = -LTTNG_ERR_UNK; | |
2154 | goto end; | |
2155 | } | |
2156 | ||
2157 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2158 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2159 | ret = -LTTNG_ERR_UNK; | |
2160 | goto end; | |
2161 | } | |
780d4bb8 | 2162 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2163 | end: |
3e3665b8 | 2164 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2165 | return ret; |
2166 | } | |
2167 | ||
2168 | /* | |
2169 | * Destroy the session without waiting for the data. | |
2170 | */ | |
2171 | int lttng_destroy_session_no_wait(const char *session_name) | |
2172 | { | |
3e3665b8 | 2173 | enum lttng_error_code ret_code; |
e20ee7c2 | 2174 | |
cd9adb8b | 2175 | ret_code = lttng_destroy_session_ext(session_name, nullptr); |
3204017e | 2176 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2177 | } |
2178 | ||
57167058 | 2179 | /* |
9ae110e2 JG |
2180 | * Ask the session daemon for all available sessions. |
2181 | * Sets the contents of the sessions array. | |
2182 | * Returns the number of lttng_session entries in sessions; | |
2183 | * on error, returns a negative value. | |
57167058 | 2184 | */ |
b178f53e | 2185 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2186 | { |
ca95a216 | 2187 | int ret; |
cd80958d | 2188 | struct lttcomm_session_msg lsm; |
28ab034a JG |
2189 | const size_t session_size = |
2190 | sizeof(struct lttng_session) + sizeof(struct lttng_session_extended); | |
b178f53e JG |
2191 | size_t session_count, i; |
2192 | struct lttng_session_extended *sessions_extended_begin; | |
cd9adb8b | 2193 | struct lttng_session *sessions = nullptr; |
57167058 | 2194 | |
53efb85a | 2195 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2196 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_SESSIONS; |
985aea18 MD |
2197 | /* |
2198 | * Initialize out_sessions to NULL so it is initialized when | |
2199 | * lttng_list_sessions returns 0, thus allowing *out_sessions to | |
2200 | * be subsequently freed. | |
2201 | */ | |
cd9adb8b | 2202 | *out_sessions = nullptr; |
28ab034a | 2203 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &sessions); |
b178f53e | 2204 | if (ret <= 0) { |
b178f53e JG |
2205 | goto end; |
2206 | } | |
2207 | if (!sessions) { | |
2208 | ret = -LTTNG_ERR_FATAL; | |
2209 | goto end; | |
2210 | } | |
2211 | ||
2212 | if (ret % session_size) { | |
2213 | ret = -LTTNG_ERR_UNK; | |
2214 | free(sessions); | |
b178f53e | 2215 | goto end; |
57167058 | 2216 | } |
b178f53e | 2217 | session_count = (size_t) ret / session_size; |
28ab034a | 2218 | sessions_extended_begin = (struct lttng_session_extended *) (&sessions[session_count]); |
57167058 | 2219 | |
b178f53e JG |
2220 | /* Set extended session info pointers. */ |
2221 | for (i = 0; i < session_count; i++) { | |
2222 | struct lttng_session *session = &sessions[i]; | |
28ab034a | 2223 | struct lttng_session_extended *extended = &(sessions_extended_begin[i]); |
b178f53e JG |
2224 | |
2225 | session->extended.ptr = extended; | |
2226 | } | |
2227 | ||
2228 | ret = (int) session_count; | |
2229 | *out_sessions = sessions; | |
2230 | end: | |
2231 | return ret; | |
2232 | } | |
2233 | ||
28ab034a JG |
2234 | enum lttng_error_code lttng_session_get_creation_time(const struct lttng_session *session, |
2235 | uint64_t *creation_time) | |
b178f53e JG |
2236 | { |
2237 | enum lttng_error_code ret = LTTNG_OK; | |
2238 | struct lttng_session_extended *extended; | |
2239 | ||
2240 | if (!session || !creation_time || !session->extended.ptr) { | |
2241 | ret = LTTNG_ERR_INVALID; | |
2242 | goto end; | |
2243 | } | |
2244 | ||
4bd69c5f | 2245 | extended = (lttng_session_extended *) session->extended.ptr; |
b178f53e JG |
2246 | if (!extended->creation_time.is_set) { |
2247 | /* Not created on the session daemon yet. */ | |
2248 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2249 | goto end; | |
2250 | } | |
2251 | *creation_time = extended->creation_time.value; | |
2252 | end: | |
2253 | return ret; | |
57167058 DG |
2254 | } |
2255 | ||
28ab034a | 2256 | int lttng_set_session_shm_path(const char *session_name, const char *shm_path) |
d7ba1388 | 2257 | { |
e1b624d0 | 2258 | int ret; |
d7ba1388 MD |
2259 | struct lttcomm_session_msg lsm; |
2260 | ||
cd9adb8b | 2261 | if (session_name == nullptr) { |
d7ba1388 MD |
2262 | return -LTTNG_ERR_INVALID; |
2263 | } | |
2264 | ||
2265 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2266 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_SET_SESSION_SHM_PATH; |
d7ba1388 | 2267 | |
28ab034a | 2268 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2269 | if (ret) { |
2270 | ret = -LTTNG_ERR_INVALID; | |
2271 | goto end; | |
2272 | } | |
2273 | ||
28ab034a JG |
2274 | ret = lttng_strncpy( |
2275 | lsm.u.set_shm_path.shm_path, shm_path ?: "", sizeof(lsm.u.set_shm_path.shm_path)); | |
e1b624d0 JG |
2276 | if (ret) { |
2277 | ret = -LTTNG_ERR_INVALID; | |
2278 | goto end; | |
2279 | } | |
d7ba1388 | 2280 | |
cd9adb8b | 2281 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
e1b624d0 JG |
2282 | end: |
2283 | return ret; | |
d7ba1388 MD |
2284 | } |
2285 | ||
9f19cc17 | 2286 | /* |
9ae110e2 JG |
2287 | * Ask the session daemon for all available domains of a session. |
2288 | * Sets the contents of the domains array. | |
2289 | * Returns the number of lttng_domain entries in domains; | |
2290 | * on error, returns a negative value. | |
9f19cc17 | 2291 | */ |
28ab034a | 2292 | int lttng_list_domains(const char *session_name, struct lttng_domain **domains) |
9f19cc17 DG |
2293 | { |
2294 | int ret; | |
cd80958d DG |
2295 | struct lttcomm_session_msg lsm; |
2296 | ||
cd9adb8b | 2297 | if (session_name == nullptr) { |
e1b624d0 JG |
2298 | ret = -LTTNG_ERR_INVALID; |
2299 | goto error; | |
cd80958d | 2300 | } |
9f19cc17 | 2301 | |
53efb85a | 2302 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2303 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_DOMAINS; |
cd80958d | 2304 | |
28ab034a | 2305 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2306 | if (ret) { |
2307 | ret = -LTTNG_ERR_INVALID; | |
2308 | goto error; | |
2309 | } | |
cd80958d | 2310 | |
28ab034a | 2311 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) domains); |
9f19cc17 | 2312 | if (ret < 0) { |
e1b624d0 | 2313 | goto error; |
9f19cc17 DG |
2314 | } |
2315 | ||
2316 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2317 | error: |
2318 | return ret; | |
9f19cc17 DG |
2319 | } |
2320 | ||
2321 | /* | |
9ae110e2 JG |
2322 | * Ask the session daemon for all available channels of a session. |
2323 | * Sets the contents of the channels array. | |
2324 | * Returns the number of lttng_channel entries in channels; | |
2325 | * on error, returns a negative value. | |
9f19cc17 | 2326 | */ |
28ab034a | 2327 | int lttng_list_channels(struct lttng_handle *handle, struct lttng_channel **channels) |
9f19cc17 | 2328 | { |
999af9c1 | 2329 | int ret, total_payload_received; |
cd80958d | 2330 | struct lttcomm_session_msg lsm; |
cd9adb8b | 2331 | char *reception_buffer = nullptr; |
999af9c1 | 2332 | size_t cmd_header_len = 0; |
cd9adb8b | 2333 | struct lttcomm_list_command_header *cmd_header = nullptr; |
999af9c1 JR |
2334 | struct lttng_dynamic_buffer tmp_buffer; |
2335 | ||
2336 | lttng_dynamic_buffer_init(&tmp_buffer); | |
cd80958d | 2337 | |
cd9adb8b | 2338 | if (handle == nullptr) { |
53e367f9 JG |
2339 | ret = -LTTNG_ERR_INVALID; |
2340 | goto end; | |
cd80958d DG |
2341 | } |
2342 | ||
53efb85a | 2343 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2344 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_CHANNELS; |
28ab034a | 2345 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2346 | if (ret) { |
2347 | ret = -LTTNG_ERR_INVALID; | |
2348 | goto end; | |
2349 | } | |
9f19cc17 | 2350 | |
60160d2a | 2351 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2352 | |
28ab034a | 2353 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
cd9adb8b | 2354 | nullptr, |
28ab034a | 2355 | 0, |
cd9adb8b | 2356 | nullptr, |
28ab034a JG |
2357 | 0, |
2358 | (void **) &reception_buffer, | |
2359 | (void **) &cmd_header, | |
2360 | &cmd_header_len); | |
9f19cc17 | 2361 | if (ret < 0) { |
53e367f9 JG |
2362 | goto end; |
2363 | } | |
2364 | ||
999af9c1 JR |
2365 | total_payload_received = ret; |
2366 | ||
2367 | if (cmd_header_len != sizeof(*cmd_header)) { | |
2368 | ret = -LTTNG_ERR_FATAL; | |
53e367f9 | 2369 | goto end; |
9f19cc17 DG |
2370 | } |
2371 | ||
999af9c1 JR |
2372 | if (!cmd_header) { |
2373 | ret = LTTNG_ERR_UNK; | |
2374 | goto end; | |
2375 | } | |
2376 | ||
2377 | if (cmd_header->count > INT_MAX) { | |
2378 | ret = -LTTNG_ERR_OVERFLOW; | |
2379 | goto end; | |
2380 | } | |
53e367f9 | 2381 | |
999af9c1 JR |
2382 | { |
2383 | enum lttng_error_code ret_code; | |
2384 | const struct lttng_buffer_view events_view = | |
28ab034a | 2385 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); |
999af9c1 JR |
2386 | |
2387 | ret_code = lttng_channels_create_and_flatten_from_buffer( | |
28ab034a | 2388 | &events_view, cmd_header->count, channels); |
999af9c1 JR |
2389 | if (ret_code != LTTNG_OK) { |
2390 | ret = -ret_code; | |
2391 | goto end; | |
2392 | } | |
53e367f9 JG |
2393 | } |
2394 | ||
999af9c1 | 2395 | ret = (int) cmd_header->count; |
53e367f9 | 2396 | end: |
999af9c1 JR |
2397 | free(cmd_header); |
2398 | free(reception_buffer); | |
53e367f9 | 2399 | return ret; |
9f19cc17 DG |
2400 | } |
2401 | ||
2402 | /* | |
9ae110e2 JG |
2403 | * Ask the session daemon for all available events of a session channel. |
2404 | * Sets the contents of the events array. | |
2405 | * Returns the number of lttng_event entries in events; | |
2406 | * on error, returns a negative value. | |
9f19cc17 | 2407 | */ |
cd80958d | 2408 | int lttng_list_events(struct lttng_handle *handle, |
28ab034a JG |
2409 | const char *channel_name, |
2410 | struct lttng_event **events) | |
9f19cc17 DG |
2411 | { |
2412 | int ret; | |
e368fb43 | 2413 | struct lttcomm_session_msg lsm = {}; |
8ddd72ef | 2414 | struct lttng_payload reply; |
e368fb43 | 2415 | struct lttng_payload_view lsm_view = |
28ab034a | 2416 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
8ddd72ef | 2417 | unsigned int nb_events = 0; |
9f19cc17 | 2418 | |
821a8b53 JR |
2419 | lttng_payload_init(&reply); |
2420 | ||
8ddd72ef | 2421 | /* Safety check. An handle and channel name are mandatory. */ |
cd9adb8b | 2422 | if (handle == nullptr || channel_name == nullptr) { |
e368fb43 JG |
2423 | ret = -LTTNG_ERR_INVALID; |
2424 | goto end; | |
cd80958d DG |
2425 | } |
2426 | ||
8ddd72ef | 2427 | /* Initialize command parameters. */ |
37a5ef39 | 2428 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_EVENTS; |
28ab034a | 2429 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2430 | if (ret) { |
2431 | ret = -LTTNG_ERR_INVALID; | |
2432 | goto end; | |
2433 | } | |
2434 | ||
28ab034a | 2435 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2436 | if (ret) { |
2437 | ret = -LTTNG_ERR_INVALID; | |
2438 | goto end; | |
2439 | } | |
2440 | ||
60160d2a | 2441 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2442 | |
8ddd72ef JR |
2443 | /* Execute command against the session daemon. */ |
2444 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
9f19cc17 | 2445 | if (ret < 0) { |
de453daa | 2446 | goto end; |
9f19cc17 DG |
2447 | } |
2448 | ||
e368fb43 | 2449 | { |
cd9adb8b | 2450 | const struct lttcomm_list_command_header *cmd_reply_header = nullptr; |
8ddd72ef | 2451 | const lttng_payload_view cmd_reply_header_view = |
28ab034a | 2452 | lttng_payload_view_from_payload(&reply, 0, sizeof(*cmd_reply_header)); |
8ddd72ef JR |
2453 | |
2454 | if (!lttng_payload_view_is_valid(&cmd_reply_header_view)) { | |
2455 | ret = -LTTNG_ERR_INVALID_PROTOCOL; | |
2456 | goto end; | |
56f0bc67 | 2457 | } |
b4e3ceb9 | 2458 | |
8ddd72ef | 2459 | cmd_reply_header = (const struct lttcomm_list_command_header *) |
28ab034a | 2460 | cmd_reply_header_view.buffer.data; |
8ddd72ef JR |
2461 | if (cmd_reply_header->count > INT_MAX) { |
2462 | ret = -LTTNG_ERR_OVERFLOW; | |
2463 | goto end; | |
2464 | } | |
56f0bc67 | 2465 | |
8ddd72ef | 2466 | nb_events = (unsigned int) cmd_reply_header->count; |
56f0bc67 | 2467 | } |
de453daa | 2468 | |
e368fb43 | 2469 | { |
8ddd72ef JR |
2470 | enum lttng_error_code ret_code; |
2471 | lttng_payload_view cmd_reply_payload = lttng_payload_view_from_payload( | |
28ab034a | 2472 | &reply, sizeof(struct lttcomm_list_command_header), -1); |
56f0bc67 | 2473 | |
8ddd72ef | 2474 | ret_code = lttng_events_create_and_flatten_from_payload( |
28ab034a | 2475 | &cmd_reply_payload, nb_events, events); |
8ddd72ef JR |
2476 | if (ret_code != LTTNG_OK) { |
2477 | ret = -((int) ret_code); | |
2478 | goto end; | |
56f0bc67 | 2479 | } |
de453daa JG |
2480 | } |
2481 | ||
de453daa JG |
2482 | ret = (int) nb_events; |
2483 | end: | |
8ddd72ef | 2484 | lttng_payload_reset(&reply); |
b4e3ceb9 | 2485 | return ret; |
9f19cc17 DG |
2486 | } |
2487 | ||
fac6795d | 2488 | /* |
1c8d13c8 TD |
2489 | * Sets the tracing_group variable with name. |
2490 | * This function allocates memory pointed to by tracing_group. | |
2491 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2492 | */ |
2493 | int lttng_set_tracing_group(const char *name) | |
2494 | { | |
e32a3d0f | 2495 | int ret = 0; |
76da29b6 | 2496 | char *new_group; |
e32a3d0f | 2497 | |
cd9adb8b | 2498 | if (name == nullptr) { |
e32a3d0f JG |
2499 | ret = -LTTNG_ERR_INVALID; |
2500 | goto end; | |
9d697d3d DG |
2501 | } |
2502 | ||
e32a3d0f JG |
2503 | new_group = strdup(name); |
2504 | if (!new_group) { | |
2505 | ret = -LTTNG_ERR_FATAL; | |
2506 | goto end; | |
fac6795d DG |
2507 | } |
2508 | ||
76da29b6 JR |
2509 | free(tracing_group); |
2510 | tracing_group = new_group; | |
cd9adb8b | 2511 | new_group = nullptr; |
76da29b6 | 2512 | |
e32a3d0f JG |
2513 | end: |
2514 | return ret; | |
fac6795d DG |
2515 | } |
2516 | ||
f46376a1 | 2517 | int lttng_calibrate(struct lttng_handle *handle __attribute__((unused)), |
28ab034a | 2518 | struct lttng_calibrate *calibrate __attribute__((unused))) |
d0254c7c | 2519 | { |
b812e5ca PP |
2520 | /* |
2521 | * This command was removed in LTTng 2.9. | |
2522 | */ | |
2523 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2524 | } |
2525 | ||
5edd7e09 DG |
2526 | /* |
2527 | * Set default channel attributes. | |
441c16a7 | 2528 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 | 2529 | */ |
28ab034a | 2530 | void lttng_channel_set_default_attr(struct lttng_domain *domain, struct lttng_channel_attr *attr) |
5edd7e09 | 2531 | { |
294851b0 | 2532 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2533 | |
5edd7e09 | 2534 | /* Safety check */ |
cd9adb8b | 2535 | if (attr == nullptr || domain == nullptr) { |
5edd7e09 DG |
2536 | return; |
2537 | } | |
2538 | ||
999af9c1 | 2539 | /* Save the pointer for later use */ |
294851b0 | 2540 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2541 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2542 | ||
0a9c6494 DG |
2543 | /* Same for all domains. */ |
2544 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2545 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2546 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2547 | ||
5edd7e09 DG |
2548 | switch (domain->type) { |
2549 | case LTTNG_DOMAIN_KERNEL: | |
28ab034a | 2550 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
d92ff3ef | 2551 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2552 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2553 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2554 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
2555 | break; | |
2556 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2557 | switch (domain->buf_type) { |
2558 | case LTTNG_BUFFER_PER_UID: | |
2559 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2560 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2561 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
28ab034a JG |
2562 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; |
2563 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2564 | break; |
2565 | case LTTNG_BUFFER_PER_PID: | |
2566 | default: | |
2567 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2568 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2569 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
28ab034a JG |
2570 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; |
2571 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2572 | break; |
2573 | } | |
5edd7e09 | 2574 | default: |
441c16a7 | 2575 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2576 | break; |
2577 | } | |
cf0bcb51 | 2578 | |
999af9c1 JR |
2579 | if (extended) { |
2580 | lttng_channel_set_default_extended_attr(domain, extended); | |
2581 | } | |
2582 | ||
2583 | /* Reassign the extended pointer. */ | |
cf0bcb51 | 2584 | attr->extended.ptr = extended; |
5edd7e09 DG |
2585 | } |
2586 | ||
5ba3702f | 2587 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
28ab034a | 2588 | uint64_t *discarded_events) |
5ba3702f JG |
2589 | { |
2590 | int ret = 0; | |
cf0bcb51 | 2591 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2592 | |
2593 | if (!channel || !discarded_events) { | |
2594 | ret = -LTTNG_ERR_INVALID; | |
2595 | goto end; | |
2596 | } | |
2597 | ||
4bd69c5f | 2598 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2599 | if (!chan_ext) { |
2600 | /* | |
2601 | * This can happen since the lttng_channel structure is | |
2602 | * used for other tasks where this pointer is never set. | |
2603 | */ | |
2604 | *discarded_events = 0; | |
2605 | goto end; | |
2606 | } | |
2607 | ||
2608 | *discarded_events = chan_ext->discarded_events; | |
2609 | end: | |
2610 | return ret; | |
2611 | } | |
2612 | ||
28ab034a | 2613 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, uint64_t *lost_packets) |
5ba3702f JG |
2614 | { |
2615 | int ret = 0; | |
cf0bcb51 | 2616 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2617 | |
2618 | if (!channel || !lost_packets) { | |
2619 | ret = -LTTNG_ERR_INVALID; | |
2620 | goto end; | |
2621 | } | |
2622 | ||
4bd69c5f | 2623 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2624 | if (!chan_ext) { |
2625 | /* | |
2626 | * This can happen since the lttng_channel structure is | |
2627 | * used for other tasks where this pointer is never set. | |
2628 | */ | |
2629 | *lost_packets = 0; | |
2630 | goto end; | |
2631 | } | |
2632 | ||
2633 | *lost_packets = chan_ext->lost_packets; | |
2634 | end: | |
2635 | return ret; | |
2636 | } | |
2637 | ||
cf0bcb51 | 2638 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
28ab034a | 2639 | uint64_t *monitor_timer_interval) |
cf0bcb51 JG |
2640 | { |
2641 | int ret = 0; | |
2642 | ||
2643 | if (!chan || !monitor_timer_interval) { | |
2644 | ret = -LTTNG_ERR_INVALID; | |
2645 | goto end; | |
2646 | } | |
2647 | ||
2648 | if (!chan->attr.extended.ptr) { | |
2649 | ret = -LTTNG_ERR_INVALID; | |
2650 | goto end; | |
2651 | } | |
2652 | ||
28ab034a JG |
2653 | *monitor_timer_interval = |
2654 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->monitor_timer_interval; | |
cf0bcb51 JG |
2655 | end: |
2656 | return ret; | |
2657 | } | |
2658 | ||
2659 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
28ab034a | 2660 | uint64_t monitor_timer_interval) |
cf0bcb51 JG |
2661 | { |
2662 | int ret = 0; | |
2663 | ||
2664 | if (!chan || !chan->attr.extended.ptr) { | |
2665 | ret = -LTTNG_ERR_INVALID; | |
2666 | goto end; | |
2667 | } | |
2668 | ||
28ab034a JG |
2669 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->monitor_timer_interval = |
2670 | monitor_timer_interval; | |
cf0bcb51 JG |
2671 | end: |
2672 | return ret; | |
2673 | } | |
2674 | ||
28ab034a | 2675 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, int64_t *blocking_timeout) |
491d1539 MD |
2676 | { |
2677 | int ret = 0; | |
2678 | ||
2679 | if (!chan || !blocking_timeout) { | |
2680 | ret = -LTTNG_ERR_INVALID; | |
2681 | goto end; | |
2682 | } | |
2683 | ||
2684 | if (!chan->attr.extended.ptr) { | |
2685 | ret = -LTTNG_ERR_INVALID; | |
2686 | goto end; | |
2687 | } | |
2688 | ||
28ab034a JG |
2689 | *blocking_timeout = |
2690 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->blocking_timeout; | |
491d1539 MD |
2691 | end: |
2692 | return ret; | |
2693 | } | |
2694 | ||
28ab034a | 2695 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, int64_t blocking_timeout) |
491d1539 MD |
2696 | { |
2697 | int ret = 0; | |
2698 | int64_t msec_timeout; | |
2699 | ||
2700 | if (!chan || !chan->attr.extended.ptr) { | |
2701 | ret = -LTTNG_ERR_INVALID; | |
2702 | goto end; | |
2703 | } | |
2704 | ||
2705 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2706 | ret = -LTTNG_ERR_INVALID; | |
2707 | goto end; | |
2708 | } | |
2709 | ||
2710 | /* | |
2711 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2712 | * us to accept a narrower range of values (msecs expressed as a signed | |
2713 | * 32-bit integer). | |
2714 | */ | |
2715 | msec_timeout = blocking_timeout / 1000; | |
2716 | if (msec_timeout != (int32_t) msec_timeout) { | |
2717 | ret = -LTTNG_ERR_INVALID; | |
2718 | goto end; | |
2719 | } | |
2720 | ||
28ab034a JG |
2721 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->blocking_timeout = |
2722 | blocking_timeout; | |
491d1539 MD |
2723 | end: |
2724 | return ret; | |
2725 | } | |
2726 | ||
fac6795d | 2727 | /* |
2269e89e | 2728 | * Check if session daemon is alive. |
fac6795d | 2729 | * |
2269e89e | 2730 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2731 | * On error returns a negative value. |
fac6795d | 2732 | */ |
947308c4 | 2733 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2734 | { |
2735 | int ret; | |
2736 | ||
2737 | ret = set_session_daemon_path(); | |
2738 | if (ret < 0) { | |
9ae110e2 | 2739 | /* Error. */ |
fac6795d DG |
2740 | return ret; |
2741 | } | |
2742 | ||
9d035200 | 2743 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2744 | /* |
9ae110e2 JG |
2745 | * No socket path set. Weird error which means the constructor |
2746 | * was not called. | |
2f70b271 | 2747 | */ |
a0377dfe | 2748 | abort(); |
fac6795d DG |
2749 | } |
2750 | ||
2269e89e | 2751 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2752 | if (ret < 0) { |
9ae110e2 | 2753 | /* Not alive. */ |
7d8234d9 MD |
2754 | return 0; |
2755 | } | |
7d8234d9 | 2756 | |
9ae110e2 | 2757 | /* Is alive. */ |
947308c4 | 2758 | return 1; |
fac6795d DG |
2759 | } |
2760 | ||
00e2e675 | 2761 | /* |
a4b92340 | 2762 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2763 | * |
2764 | * Return 0 on success, else a negative value. | |
2765 | */ | |
a4b92340 | 2766 | int lttng_set_consumer_url(struct lttng_handle *handle, |
28ab034a JG |
2767 | const char *control_url, |
2768 | const char *data_url) | |
00e2e675 | 2769 | { |
3dd05a85 | 2770 | int ret; |
a4b92340 | 2771 | ssize_t size; |
00e2e675 | 2772 | struct lttcomm_session_msg lsm; |
cd9adb8b | 2773 | struct lttng_uri *uris = nullptr; |
00e2e675 | 2774 | |
cd9adb8b | 2775 | if (handle == nullptr || (control_url == nullptr && data_url == nullptr)) { |
e1b624d0 JG |
2776 | ret = -LTTNG_ERR_INVALID; |
2777 | goto error; | |
00e2e675 DG |
2778 | } |
2779 | ||
a4b92340 DG |
2780 | memset(&lsm, 0, sizeof(lsm)); |
2781 | ||
37a5ef39 | 2782 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_SET_CONSUMER_URI; |
00e2e675 | 2783 | |
28ab034a | 2784 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2785 | if (ret) { |
2786 | ret = -LTTNG_ERR_INVALID; | |
2787 | goto error; | |
2788 | } | |
2789 | ||
60160d2a | 2790 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2791 | |
bc894455 | 2792 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2793 | if (size < 0) { |
e1b624d0 JG |
2794 | ret = -LTTNG_ERR_INVALID; |
2795 | goto error; | |
a4b92340 DG |
2796 | } |
2797 | ||
2798 | lsm.u.uri.size = size; | |
00e2e675 | 2799 | |
28ab034a | 2800 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( |
cd9adb8b | 2801 | &lsm, uris, sizeof(struct lttng_uri) * size, nullptr); |
3dd05a85 DG |
2802 | |
2803 | free(uris); | |
e1b624d0 | 2804 | error: |
3dd05a85 | 2805 | return ret; |
00e2e675 DG |
2806 | } |
2807 | ||
2808 | /* | |
9c6bda17 | 2809 | * [OBSOLETE] |
00e2e675 | 2810 | */ |
28ab034a | 2811 | extern "C" LTTNG_EXPORT int lttng_enable_consumer(struct lttng_handle *handle); |
f46376a1 | 2812 | int lttng_enable_consumer(struct lttng_handle *handle __attribute__((unused))) |
00e2e675 | 2813 | { |
785d2d0d | 2814 | return -ENOSYS; |
00e2e675 DG |
2815 | } |
2816 | ||
2817 | /* | |
9c6bda17 | 2818 | * [OBSOLETE] |
00e2e675 | 2819 | */ |
28ab034a | 2820 | extern "C" LTTNG_EXPORT int lttng_disable_consumer(struct lttng_handle *handle); |
f46376a1 | 2821 | int lttng_disable_consumer(struct lttng_handle *handle __attribute__((unused))) |
00e2e675 | 2822 | { |
785d2d0d | 2823 | return -ENOSYS; |
00e2e675 DG |
2824 | } |
2825 | ||
07424f16 | 2826 | /* |
b178f53e | 2827 | * [OBSOLETE] |
07424f16 | 2828 | */ |
28ab034a JG |
2829 | extern "C" LTTNG_EXPORT int |
2830 | _lttng_create_session_ext(const char *name, const char *url, const char *datetime); | |
f46376a1 | 2831 | int _lttng_create_session_ext(const char *name __attribute__((unused)), |
28ab034a JG |
2832 | const char *url __attribute__((unused)), |
2833 | const char *datetime __attribute__((unused))) | |
07424f16 | 2834 | { |
b178f53e | 2835 | return -ENOSYS; |
07424f16 DG |
2836 | } |
2837 | ||
806e2684 DG |
2838 | /* |
2839 | * For a given session name, this call checks if the data is ready to be read | |
2840 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2841 | * any readers. | |
2842 | */ | |
6d805429 | 2843 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2844 | { |
2845 | int ret; | |
2846 | struct lttcomm_session_msg lsm; | |
cd9adb8b | 2847 | uint8_t *pending = nullptr; |
806e2684 | 2848 | |
cd9adb8b | 2849 | if (session_name == nullptr) { |
806e2684 DG |
2850 | return -LTTNG_ERR_INVALID; |
2851 | } | |
2852 | ||
53efb85a | 2853 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2854 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_DATA_PENDING; |
806e2684 | 2855 | |
28ab034a | 2856 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2857 | if (ret) { |
2858 | ret = -LTTNG_ERR_INVALID; | |
2859 | goto end; | |
2860 | } | |
806e2684 | 2861 | |
f6151c55 JG |
2862 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2863 | if (ret < 0) { | |
2864 | goto end; | |
2865 | } else if (ret != 1) { | |
2866 | /* Unexpected payload size */ | |
2867 | ret = -LTTNG_ERR_INVALID; | |
2868 | goto end; | |
e848d36d JG |
2869 | } else if (!pending) { |
2870 | /* Internal error. */ | |
2871 | ret = -LTTNG_ERR_UNK; | |
2872 | goto end; | |
806e2684 DG |
2873 | } |
2874 | ||
f6151c55 JG |
2875 | ret = (int) *pending; |
2876 | end: | |
2877 | free(pending); | |
806e2684 DG |
2878 | return ret; |
2879 | } | |
2880 | ||
49cddecd KS |
2881 | /* |
2882 | * Get the status of the kernel tracer | |
2883 | * | |
2884 | * Sets the value of the argument | |
2885 | */ | |
d93bbc2a | 2886 | enum lttng_error_code lttng_get_kernel_tracer_status(enum lttng_kernel_tracer_status *out_status) |
49cddecd | 2887 | { |
d93bbc2a | 2888 | if (out_status == nullptr) { |
49cddecd KS |
2889 | return LTTNG_ERR_INVALID; |
2890 | } | |
2891 | ||
2892 | struct lttcomm_session_msg lsm = {}; | |
2893 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_KERNEL_TRACER_STATUS; | |
2894 | ||
d93bbc2a JG |
2895 | uint32_t *raw_tracer_status = nullptr; |
2896 | const auto ask_ret = lttng_ctl_ask_sessiond(&lsm, (void **) &raw_tracer_status); | |
2897 | ||
2898 | const auto tracer_status = | |
2899 | lttng::make_unique_wrapper<uint32_t, lttng::free>(raw_tracer_status); | |
2900 | ||
49cddecd | 2901 | if (ask_ret != 4) { |
d93bbc2a | 2902 | return LTTNG_ERR_INVALID; |
49cddecd KS |
2903 | } |
2904 | ||
d93bbc2a JG |
2905 | *out_status = (enum lttng_kernel_tracer_status) * tracer_status; |
2906 | return LTTNG_OK; | |
49cddecd KS |
2907 | } |
2908 | ||
93ec662e JD |
2909 | /* |
2910 | * Regenerate the metadata for a session. | |
2911 | * Return 0 on success, a negative error code on error. | |
2912 | */ | |
eded6438 | 2913 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2914 | { |
2915 | int ret; | |
2916 | struct lttcomm_session_msg lsm; | |
2917 | ||
2918 | if (!session_name) { | |
2919 | ret = -LTTNG_ERR_INVALID; | |
2920 | goto end; | |
2921 | } | |
2922 | ||
2923 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2924 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGENERATE_METADATA; |
93ec662e | 2925 | |
28ab034a | 2926 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2927 | if (ret) { |
2928 | ret = -LTTNG_ERR_INVALID; | |
2929 | goto end; | |
2930 | } | |
93ec662e | 2931 | |
cd9adb8b | 2932 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
93ec662e JD |
2933 | if (ret < 0) { |
2934 | goto end; | |
2935 | } | |
2936 | ||
2937 | ret = 0; | |
2938 | end: | |
2939 | return ret; | |
2940 | } | |
2941 | ||
eded6438 JD |
2942 | /* |
2943 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2944 | */ | |
2945 | int lttng_metadata_regenerate(const char *session_name) | |
2946 | { | |
2947 | return lttng_regenerate_metadata(session_name); | |
2948 | } | |
2949 | ||
c2561365 JD |
2950 | /* |
2951 | * Regenerate the statedump of a session. | |
2952 | * Return 0 on success, a negative error code on error. | |
2953 | */ | |
2954 | int lttng_regenerate_statedump(const char *session_name) | |
2955 | { | |
2956 | int ret; | |
2957 | struct lttcomm_session_msg lsm; | |
2958 | ||
2959 | if (!session_name) { | |
2960 | ret = -LTTNG_ERR_INVALID; | |
2961 | goto end; | |
2962 | } | |
2963 | ||
2964 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2965 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGENERATE_STATEDUMP; |
c2561365 | 2966 | |
28ab034a | 2967 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2968 | if (ret) { |
2969 | ret = -LTTNG_ERR_INVALID; | |
2970 | goto end; | |
2971 | } | |
c2561365 | 2972 | |
cd9adb8b | 2973 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
c2561365 JD |
2974 | if (ret < 0) { |
2975 | goto end; | |
2976 | } | |
2977 | ||
2978 | ret = 0; | |
2979 | end: | |
2980 | return ret; | |
2981 | } | |
2982 | ||
28ab034a JG |
2983 | static int |
2984 | _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, bool generate_name) | |
a58c490f JG |
2985 | { |
2986 | int ret; | |
99608320 | 2987 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 2988 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_REGISTER_TRIGGER, |
1c9a0b0e MJ |
2989 | .session = {}, |
2990 | .domain = {}, | |
2991 | .u = {}, | |
2992 | .fd_count = 0, | |
99608320 | 2993 | }; |
4bd69c5f | 2994 | lsm.u.trigger.is_trigger_anonymous = !name && !generate_name; |
99608320 JR |
2995 | struct lttcomm_session_msg *message_lsm; |
2996 | struct lttng_payload message; | |
2997 | struct lttng_payload reply; | |
cd9adb8b | 2998 | struct lttng_trigger *reply_trigger = nullptr; |
9124c630 | 2999 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
3000 | const struct lttng_credentials user_creds = { |
3001 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3002 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3003 | }; | |
cd9adb8b | 3004 | const char *unused_trigger_name = nullptr; |
a5c2d2a7 | 3005 | enum lttng_trigger_status trigger_status; |
99608320 JR |
3006 | |
3007 | lttng_payload_init(&message); | |
3008 | lttng_payload_init(&reply); | |
a58c490f JG |
3009 | |
3010 | if (!trigger) { | |
3011 | ret = -LTTNG_ERR_INVALID; | |
3012 | goto end; | |
3013 | } | |
3014 | ||
a5c2d2a7 JG |
3015 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
3016 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
3017 | /* Re-using already registered trigger. */ | |
3018 | ret = -LTTNG_ERR_INVALID; | |
3019 | goto end; | |
3020 | } | |
3021 | ||
3022 | if (name) { | |
3023 | trigger_status = lttng_trigger_set_name(trigger, name); | |
3024 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3025 | ret = -LTTNG_ERR_NOMEM; | |
3026 | goto end; | |
3027 | } | |
3028 | } | |
3029 | ||
64eafdf6 JR |
3030 | if (!trigger->creds.uid.is_set) { |
3031 | /* Use the client's credentials as the trigger credentials. */ | |
3032 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3033 | } else { | |
3034 | /* | |
3035 | * Validate that either the current trigger credentials and the | |
3036 | * client credentials are identical or that the current user is | |
3037 | * root. The root user can register, unregister triggers for | |
3038 | * himself and other users. | |
3039 | * | |
3040 | * This check is also present on the sessiond side, using the | |
3041 | * credentials passed on the socket. These check are all | |
3042 | * "safety" checks. | |
3043 | */ | |
3044 | const struct lttng_credentials *trigger_creds = | |
28ab034a | 3045 | lttng_trigger_get_credentials(trigger); |
64eafdf6 JR |
3046 | |
3047 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3048 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3049 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 3050 | goto end_unset_name; |
64eafdf6 JR |
3051 | } |
3052 | } | |
3053 | } | |
3054 | ||
a58c490f | 3055 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3056 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 3057 | goto end_unset_name; |
a58c490f JG |
3058 | } |
3059 | ||
28ab034a | 3060 | domain_type = lttng_trigger_get_underlying_domain_type_restriction(trigger); |
9124c630 JR |
3061 | |
3062 | lsm.domain.type = domain_type; | |
3063 | ||
97285430 JG |
3064 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3065 | if (ret) { | |
3066 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 3067 | goto end_unset_name; |
97285430 | 3068 | } |
99608320 | 3069 | |
99608320 | 3070 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3071 | if (ret < 0) { |
a58c490f | 3072 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3073 | goto end_unset_name; |
a58c490f JG |
3074 | } |
3075 | ||
b22f4f54 JG |
3076 | /* |
3077 | * This is needed to populate the trigger object size for the command | |
3078 | * header. | |
3079 | */ | |
3080 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3081 | ||
99608320 JR |
3082 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3083 | ||
3084 | { | |
3085 | struct lttng_payload_view message_view = | |
28ab034a | 3086 | lttng_payload_view_from_payload(&message, 0, -1); |
99608320 | 3087 | |
28ab034a | 3088 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
99608320 JR |
3089 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); |
3090 | if (ret < 0) { | |
a5c2d2a7 | 3091 | goto end_unset_name; |
99608320 JR |
3092 | } |
3093 | } | |
3094 | ||
242388e4 JR |
3095 | { |
3096 | struct lttng_payload_view reply_view = | |
28ab034a | 3097 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
242388e4 | 3098 | |
28ab034a | 3099 | ret = lttng_trigger_create_from_payload(&reply_view, &reply_trigger); |
242388e4 | 3100 | if (ret < 0) { |
a5c2d2a7 JG |
3101 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3102 | goto end_unset_name; | |
242388e4 JR |
3103 | } |
3104 | } | |
3105 | ||
a5c2d2a7 JG |
3106 | if (name || generate_name) { |
3107 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3108 | if (ret < 0) { | |
3109 | ret = -LTTNG_ERR_NOMEM; | |
3110 | goto end; | |
3111 | } | |
242388e4 JR |
3112 | } |
3113 | ||
99608320 | 3114 | ret = 0; |
a5c2d2a7 JG |
3115 | goto end; |
3116 | ||
3117 | end_unset_name: | |
cd9adb8b | 3118 | trigger_status = lttng_trigger_set_name(trigger, nullptr); |
a5c2d2a7 JG |
3119 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
3120 | ret = -LTTNG_ERR_UNK; | |
3121 | } | |
a58c490f | 3122 | end: |
99608320 JR |
3123 | lttng_payload_reset(&message); |
3124 | lttng_payload_reset(&reply); | |
242388e4 | 3125 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3126 | return ret; |
3127 | } | |
3128 | ||
a5c2d2a7 JG |
3129 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3130 | { | |
3131 | /* Register an anonymous trigger. */ | |
cd9adb8b | 3132 | return _lttng_register_trigger(trigger, nullptr, false); |
a5c2d2a7 JG |
3133 | } |
3134 | ||
28ab034a JG |
3135 | enum lttng_error_code lttng_register_trigger_with_name(struct lttng_trigger *trigger, |
3136 | const char *name) | |
a5c2d2a7 JG |
3137 | { |
3138 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3139 | ||
28ab034a | 3140 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) - ret; |
a5c2d2a7 JG |
3141 | } |
3142 | ||
28ab034a | 3143 | enum lttng_error_code lttng_register_trigger_with_automatic_name(struct lttng_trigger *trigger) |
a5c2d2a7 | 3144 | { |
28ab034a | 3145 | const int ret = _lttng_register_trigger(trigger, nullptr, true); |
a5c2d2a7 | 3146 | |
28ab034a | 3147 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) - ret; |
a5c2d2a7 JG |
3148 | } |
3149 | ||
28ab034a JG |
3150 | enum lttng_error_code lttng_error_query_execute(const struct lttng_error_query *query, |
3151 | const struct lttng_endpoint *endpoint, | |
3152 | struct lttng_error_query_results **results) | |
b99a0cb3 JG |
3153 | { |
3154 | int ret; | |
3155 | enum lttng_error_code ret_code; | |
3156 | struct lttcomm_session_msg lsm = { | |
37a5ef39 | 3157 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY, |
1c9a0b0e MJ |
3158 | .session = {}, |
3159 | .domain = {}, | |
3160 | .u = {}, | |
3161 | .fd_count = 0, | |
b99a0cb3 JG |
3162 | }; |
3163 | struct lttng_payload message; | |
3164 | struct lttng_payload reply; | |
3165 | struct lttcomm_session_msg *message_lsm; | |
3166 | ||
3167 | lttng_payload_init(&message); | |
3168 | lttng_payload_init(&reply); | |
3169 | ||
3170 | if (!query || !results) { | |
3171 | ret_code = LTTNG_ERR_INVALID; | |
3172 | goto end; | |
3173 | } | |
3174 | ||
3175 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3176 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3177 | goto end; | |
3178 | } | |
3179 | ||
3180 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3181 | if (ret) { | |
3182 | ret_code = LTTNG_ERR_NOMEM; | |
3183 | goto end; | |
3184 | } | |
3185 | ||
3186 | ret = lttng_error_query_serialize(query, &message); | |
3187 | if (ret) { | |
3188 | ret_code = LTTNG_ERR_UNK; | |
3189 | goto end; | |
3190 | } | |
3191 | ||
3192 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
28ab034a | 3193 | message_lsm->u.error_query.length = (uint32_t) message.buffer.size - sizeof(lsm); |
b99a0cb3 JG |
3194 | |
3195 | { | |
3196 | struct lttng_payload_view message_view = | |
28ab034a | 3197 | lttng_payload_view_from_payload(&message, 0, -1); |
b99a0cb3 | 3198 | |
28ab034a | 3199 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
b99a0cb3 JG |
3200 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); |
3201 | if (ret < 0) { | |
28ab034a | 3202 | ret_code = (lttng_error_code) -ret; |
b99a0cb3 JG |
3203 | goto end; |
3204 | } | |
3205 | } | |
3206 | ||
3207 | { | |
3208 | ssize_t reply_create_ret; | |
3209 | struct lttng_payload_view reply_view = | |
28ab034a | 3210 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
b99a0cb3 | 3211 | |
28ab034a JG |
3212 | reply_create_ret = |
3213 | lttng_error_query_results_create_from_payload(&reply_view, results); | |
b99a0cb3 JG |
3214 | if (reply_create_ret < 0) { |
3215 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3216 | goto end; | |
3217 | } | |
3218 | } | |
3219 | ||
3220 | ret_code = LTTNG_OK; | |
3221 | end: | |
3222 | lttng_payload_reset(&message); | |
3223 | lttng_payload_reset(&reply); | |
3224 | return ret_code; | |
3225 | } | |
3226 | ||
b61776fb | 3227 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3228 | { |
3229 | int ret; | |
3230 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3231 | struct lttcomm_session_msg *message_lsm; |
3232 | struct lttng_payload message; | |
3233 | struct lttng_payload reply; | |
cd9adb8b | 3234 | struct lttng_trigger *copy = nullptr; |
64eafdf6 JR |
3235 | const struct lttng_credentials user_creds = { |
3236 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3237 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3238 | }; | |
99608320 JR |
3239 | |
3240 | lttng_payload_init(&message); | |
3241 | lttng_payload_init(&reply); | |
a58c490f JG |
3242 | |
3243 | if (!trigger) { | |
3244 | ret = -LTTNG_ERR_INVALID; | |
3245 | goto end; | |
3246 | } | |
3247 | ||
b61776fb SM |
3248 | copy = lttng_trigger_copy(trigger); |
3249 | if (!copy) { | |
3250 | ret = -LTTNG_ERR_UNK; | |
3251 | goto end; | |
3252 | } | |
3253 | ||
3254 | if (!copy->creds.uid.is_set) { | |
3255 | /* Use the client credentials as the trigger credentials */ | |
3256 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3257 | } else { |
3258 | /* | |
3259 | * Validate that either the current trigger credentials and the | |
3260 | * client credentials are identical or that the current user is | |
3261 | * root. The root user can register, unregister triggers for | |
3262 | * himself and other users. | |
3263 | * | |
3264 | * This check is also present on the sessiond side, using the | |
3265 | * credentials passed on the socket. These check are all | |
3266 | * "safety" checks. | |
3267 | */ | |
28ab034a | 3268 | const struct lttng_credentials *trigger_creds = lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3269 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3270 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3271 | ret = -LTTNG_ERR_EPERM; | |
3272 | goto end; | |
3273 | } | |
3274 | } | |
3275 | } | |
3276 | ||
b61776fb | 3277 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3278 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3279 | goto end; |
3280 | } | |
3281 | ||
99608320 | 3282 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 3283 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_UNREGISTER_TRIGGER; |
99608320 | 3284 | |
97285430 JG |
3285 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3286 | if (ret) { | |
3287 | ret = -LTTNG_ERR_NOMEM; | |
3288 | goto end; | |
3289 | } | |
99608320 | 3290 | |
b61776fb | 3291 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3292 | if (ret < 0) { |
a58c490f JG |
3293 | ret = -LTTNG_ERR_UNK; |
3294 | goto end; | |
3295 | } | |
3296 | ||
b0a79813 FD |
3297 | /* |
3298 | * This is needed to populate the trigger object size for the command | |
3299 | * header and number of fds sent. | |
28ab034a | 3300 | */ |
b0a79813 FD |
3301 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; |
3302 | ||
99608320 JR |
3303 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3304 | ||
3305 | { | |
3306 | struct lttng_payload_view message_view = | |
28ab034a | 3307 | lttng_payload_view_from_payload(&message, 0, -1); |
99608320 JR |
3308 | |
3309 | /* | |
3310 | * Update the message header with the number of fd that will be | |
3311 | * sent. | |
3312 | */ | |
28ab034a | 3313 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
99608320 JR |
3314 | |
3315 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3316 | if (ret < 0) { | |
3317 | goto end; | |
3318 | } | |
3319 | } | |
3320 | ||
3321 | ret = 0; | |
a58c490f | 3322 | end: |
b61776fb | 3323 | lttng_trigger_destroy(copy); |
99608320 JR |
3324 | lttng_payload_reset(&message); |
3325 | lttng_payload_reset(&reply); | |
a58c490f JG |
3326 | return ret; |
3327 | } | |
3328 | ||
fbc9f37d JR |
3329 | /* |
3330 | * Ask the session daemon for all registered triggers for the current user. | |
3331 | * | |
3332 | * Allocates and return an lttng_triggers set. | |
3333 | * On error, returns a suitable lttng_error_code. | |
3334 | */ | |
3335 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3336 | { | |
3337 | int ret; | |
3338 | enum lttng_error_code ret_code = LTTNG_OK; | |
1c9a0b0e | 3339 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 3340 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS, |
1c9a0b0e MJ |
3341 | .session = {}, |
3342 | .domain = {}, | |
3343 | .u = {}, | |
3344 | .fd_count = 0, | |
3345 | }; | |
cd9adb8b | 3346 | struct lttng_triggers *local_triggers = nullptr; |
fbc9f37d JR |
3347 | struct lttng_payload reply; |
3348 | struct lttng_payload_view lsm_view = | |
28ab034a | 3349 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
fbc9f37d JR |
3350 | |
3351 | lttng_payload_init(&reply); | |
3352 | ||
3353 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3354 | if (ret < 0) { | |
28ab034a | 3355 | ret_code = (enum lttng_error_code) - ret; |
fbc9f37d JR |
3356 | goto end; |
3357 | } | |
3358 | ||
3359 | { | |
3360 | struct lttng_payload_view reply_view = | |
28ab034a | 3361 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
fbc9f37d | 3362 | |
28ab034a | 3363 | ret = lttng_triggers_create_from_payload(&reply_view, &local_triggers); |
fbc9f37d JR |
3364 | if (ret < 0) { |
3365 | ret_code = LTTNG_ERR_FATAL; | |
3366 | goto end; | |
3367 | } | |
3368 | } | |
3369 | ||
3370 | *triggers = local_triggers; | |
cd9adb8b | 3371 | local_triggers = nullptr; |
fbc9f37d JR |
3372 | end: |
3373 | lttng_payload_reset(&reply); | |
3374 | lttng_triggers_destroy(local_triggers); | |
3375 | return ret_code; | |
3376 | } | |
3377 | ||
fac6795d | 3378 | /* |
9ae110e2 | 3379 | * lib constructor. |
fac6795d | 3380 | */ |
cd9adb8b | 3381 | static void __attribute__((constructor)) init() |
fac6795d DG |
3382 | { |
3383 | /* Set default session group */ | |
bbccc3d2 | 3384 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3385 | } |
49cca668 DG |
3386 | |
3387 | /* | |
9ae110e2 | 3388 | * lib destructor. |
49cca668 | 3389 | */ |
cd9adb8b | 3390 | static void __attribute__((destructor)) lttng_ctl_exit() |
49cca668 DG |
3391 | { |
3392 | free(tracing_group); | |
3393 | } |