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: |
47abf22b | 96 | case LTTNG_DOMAIN_LOG4J2: |
0e115563 | 97 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
98 | memcpy(dst, src, sizeof(struct lttng_domain)); |
99 | break; | |
100 | default: | |
101 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 102 | break; |
cd80958d DG |
103 | } |
104 | } | |
105 | } | |
106 | ||
107 | /* | |
108 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 109 | * |
1c8d13c8 TD |
110 | * On success, returns the number of bytes sent (>=0) |
111 | * On error, returns -1 | |
fac6795d | 112 | */ |
cd80958d | 113 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
114 | { |
115 | int ret; | |
116 | ||
117 | if (!connected) { | |
2f70b271 | 118 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 119 | goto end; |
fac6795d DG |
120 | } |
121 | ||
28ab034a JG |
122 | DBG("LSM cmd type: '%s' (%d)", |
123 | lttcomm_sessiond_command_str((lttcomm_sessiond_command) lsm->cmd_type), | |
124 | lsm->cmd_type); | |
a4b92340 | 125 | |
28ab034a JG |
126 | ret = lttcomm_send_creds_unix_sock( |
127 | sessiond_socket, lsm, sizeof(struct lttcomm_session_msg)); | |
2f70b271 DG |
128 | if (ret < 0) { |
129 | ret = -LTTNG_ERR_FATAL; | |
130 | } | |
e065084a DG |
131 | |
132 | end: | |
133 | return ret; | |
134 | } | |
135 | ||
53a80697 MD |
136 | /* |
137 | * Send var len data to the session daemon. | |
138 | * | |
139 | * On success, returns the number of bytes sent (>=0) | |
140 | * On error, returns -1 | |
141 | */ | |
c2d69327 | 142 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
143 | { |
144 | int ret; | |
145 | ||
146 | if (!connected) { | |
2f70b271 | 147 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
148 | goto end; |
149 | } | |
a4b92340 | 150 | |
53a80697 MD |
151 | if (!data || !len) { |
152 | ret = 0; | |
153 | goto end; | |
154 | } | |
155 | ||
156 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
157 | if (ret < 0) { |
158 | ret = -LTTNG_ERR_FATAL; | |
159 | } | |
53a80697 MD |
160 | |
161 | end: | |
162 | return ret; | |
163 | } | |
164 | ||
a04d53fc FD |
165 | /* |
166 | * Send file descriptors to the session daemon. | |
167 | * | |
168 | * On success, returns the number of bytes sent (>=0) | |
169 | * On error, returns -1 | |
170 | */ | |
171 | static int send_session_fds(const int *fds, size_t nb_fd) | |
172 | { | |
173 | int ret; | |
174 | ||
175 | if (!connected) { | |
176 | ret = -LTTNG_ERR_NO_SESSIOND; | |
177 | goto end; | |
178 | } | |
179 | ||
180 | if (!fds || !nb_fd) { | |
181 | ret = 0; | |
182 | goto end; | |
183 | } | |
184 | ||
185 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
186 | if (ret < 0) { | |
187 | ret = -LTTNG_ERR_FATAL; | |
188 | } | |
189 | ||
190 | end: | |
191 | return ret; | |
192 | } | |
193 | ||
e065084a | 194 | /* |
cd80958d | 195 | * Receive data from the sessiond socket. |
e065084a | 196 | * |
1c8d13c8 | 197 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 198 | * On error, returns a negative lttng_error_code. |
e065084a | 199 | */ |
ca95a216 | 200 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
201 | { |
202 | int ret; | |
203 | ||
a0377dfe | 204 | LTTNG_ASSERT(len > 0); |
bacc41cc | 205 | |
e065084a | 206 | if (!connected) { |
2f70b271 | 207 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 208 | goto end; |
fac6795d DG |
209 | } |
210 | ||
ca95a216 | 211 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
212 | if (ret < 0) { |
213 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
214 | } else if (ret == 0) { |
215 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 216 | } |
fac6795d | 217 | |
e065084a | 218 | end: |
fac6795d DG |
219 | return ret; |
220 | } | |
221 | ||
e368fb43 JG |
222 | /* |
223 | * Receive a payload from the session daemon by appending to an existing | |
224 | * payload. | |
225 | * On success, returns the number of bytes received (>=0) | |
226 | * On error, returns a negative lttng_error_code. | |
227 | */ | |
228 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
229 | { | |
230 | int ret; | |
231 | const size_t original_payload_size = payload->buffer.size; | |
232 | ||
28ab034a | 233 | ret = lttng_dynamic_buffer_set_size(&payload->buffer, payload->buffer.size + len); |
e368fb43 JG |
234 | if (ret) { |
235 | ret = -LTTNG_ERR_NOMEM; | |
236 | goto end; | |
237 | } | |
238 | ||
28ab034a | 239 | ret = recv_data_sessiond(payload->buffer.data + original_payload_size, len); |
e368fb43 JG |
240 | end: |
241 | return ret; | |
242 | } | |
243 | ||
fac6795d | 244 | /* |
9ae110e2 | 245 | * Check if we are in the specified group. |
65beb5ff | 246 | * |
9ae110e2 | 247 | * If yes return 1, else return -1. |
947308c4 | 248 | */ |
cd9adb8b | 249 | int lttng_check_tracing_group() |
947308c4 | 250 | { |
28ab59d0 | 251 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
252 | int grp_list_size, grp_id, i; |
253 | int ret = -1; | |
6c71277b | 254 | const char *grp_name = tracing_group; |
947308c4 DG |
255 | |
256 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 257 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 258 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
259 | goto end; |
260 | } | |
261 | ||
262 | /* Get number of supplementary group IDs */ | |
cd9adb8b | 263 | grp_list_size = getgroups(0, nullptr); |
947308c4 | 264 | if (grp_list_size < 0) { |
6f04ed72 | 265 | PERROR("getgroups"); |
947308c4 DG |
266 | goto end; |
267 | } | |
268 | ||
269 | /* Alloc group list of the right size */ | |
64803277 | 270 | grp_list = calloc<gid_t>(grp_list_size); |
00795392 | 271 | if (!grp_list) { |
6f04ed72 | 272 | PERROR("malloc"); |
00795392 MD |
273 | goto end; |
274 | } | |
947308c4 | 275 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 276 | if (grp_id < 0) { |
6f04ed72 | 277 | PERROR("getgroups"); |
947308c4 DG |
278 | goto free_list; |
279 | } | |
280 | ||
281 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 282 | if (grp_list[i] == tracing_gid) { |
2269e89e | 283 | ret = 1; |
947308c4 DG |
284 | break; |
285 | } | |
286 | } | |
287 | ||
288 | free_list: | |
289 | free(grp_list); | |
290 | ||
291 | end: | |
292 | return ret; | |
293 | } | |
294 | ||
28ab034a | 295 | static enum lttng_error_code check_enough_available_memory(uint64_t num_bytes_requested_per_cpu) |
09b72f7a FD |
296 | { |
297 | int ret; | |
13dd7782 | 298 | enum lttng_error_code ret_code; |
09b72f7a | 299 | long num_cpu; |
13dd7782 JR |
300 | uint64_t best_mem_info; |
301 | uint64_t num_bytes_requested_total; | |
09b72f7a FD |
302 | |
303 | /* | |
304 | * Get the number of CPU currently online to compute the amount of | |
305 | * memory needed to create a buffer for every CPU. | |
306 | */ | |
307 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
308 | if (num_cpu == -1) { | |
13dd7782 JR |
309 | ret_code = LTTNG_ERR_FATAL; |
310 | goto end; | |
311 | } | |
312 | ||
313 | if (num_bytes_requested_per_cpu > UINT64_MAX / (uint64_t) num_cpu) { | |
314 | /* Overflow */ | |
315 | ret_code = LTTNG_ERR_OVERFLOW; | |
316 | goto end; | |
09b72f7a FD |
317 | } |
318 | ||
28ab034a | 319 | num_bytes_requested_total = num_bytes_requested_per_cpu * (uint64_t) num_cpu; |
09b72f7a FD |
320 | |
321 | /* | |
322 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
323 | * reliable estimate we can get but it is only exposed by the kernel | |
324 | * since 3.14. (See Linux kernel commit: | |
325 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
326 | */ | |
327 | ret = utils_get_memory_available(&best_mem_info); | |
328 | if (ret >= 0) { | |
329 | goto success; | |
330 | } | |
331 | ||
332 | /* | |
333 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
334 | * is a sanity check for obvious user error. | |
335 | */ | |
336 | ret = utils_get_memory_total(&best_mem_info); | |
337 | if (ret >= 0) { | |
338 | goto success; | |
339 | } | |
340 | ||
13dd7782 JR |
341 | /* No valid source of information. */ |
342 | ret_code = LTTNG_ERR_NOMEM; | |
343 | goto end; | |
344 | ||
09b72f7a | 345 | success: |
13dd7782 JR |
346 | if (best_mem_info >= num_bytes_requested_total) { |
347 | ret_code = LTTNG_OK; | |
348 | } else { | |
349 | ret_code = LTTNG_ERR_NOMEM; | |
350 | } | |
351 | end: | |
352 | return ret_code; | |
09b72f7a FD |
353 | } |
354 | ||
947308c4 | 355 | /* |
2269e89e DG |
356 | * Try connect to session daemon with sock_path. |
357 | * | |
358 | * Return 0 on success, else -1 | |
359 | */ | |
360 | static int try_connect_sessiond(const char *sock_path) | |
361 | { | |
362 | int ret; | |
363 | ||
364 | /* If socket exist, we check if the daemon listens for connect. */ | |
365 | ret = access(sock_path, F_OK); | |
366 | if (ret < 0) { | |
367 | /* Not alive */ | |
2f70b271 | 368 | goto error; |
2269e89e DG |
369 | } |
370 | ||
371 | ret = lttcomm_connect_unix_sock(sock_path); | |
372 | if (ret < 0) { | |
9ae110e2 | 373 | /* Not alive. */ |
2f70b271 | 374 | goto error; |
2269e89e DG |
375 | } |
376 | ||
377 | ret = lttcomm_close_unix_sock(ret); | |
378 | if (ret < 0) { | |
6f04ed72 | 379 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
380 | } |
381 | ||
382 | return 0; | |
2f70b271 DG |
383 | |
384 | error: | |
385 | return -1; | |
2269e89e DG |
386 | } |
387 | ||
388 | /* | |
2f70b271 DG |
389 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
390 | * variable. | |
391 | * | |
392 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
393 | * is somehow too long or ENOMEM). | |
947308c4 | 394 | */ |
cd9adb8b | 395 | static int set_session_daemon_path() |
947308c4 | 396 | { |
28ab034a | 397 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
398 | uid_t uid; |
399 | ||
400 | uid = getuid(); | |
947308c4 | 401 | |
2269e89e DG |
402 | if (uid != 0) { |
403 | /* Are we in the tracing group ? */ | |
6c71277b | 404 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
405 | } |
406 | ||
c295ec41 | 407 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 | 408 | const int ret = lttng_strncpy(sessiond_sock_path, |
28ab034a JG |
409 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, |
410 | sizeof(sessiond_sock_path)); | |
e1b624d0 JG |
411 | |
412 | if (ret) { | |
413 | goto error; | |
414 | } | |
08a9c49f | 415 | } |
2269e89e | 416 | |
08a9c49f | 417 | if (uid != 0) { |
c617c0c6 MD |
418 | int ret; |
419 | ||
08a9c49f | 420 | if (in_tgroup) { |
9ae110e2 | 421 | /* Tracing group. */ |
08a9c49f TD |
422 | ret = try_connect_sessiond(sessiond_sock_path); |
423 | if (ret >= 0) { | |
424 | goto end; | |
2269e89e | 425 | } |
08a9c49f | 426 | /* Global session daemon not available... */ |
2269e89e | 427 | } |
08a9c49f TD |
428 | /* ...or not in tracing group (and not root), default */ |
429 | ||
430 | /* | |
9ae110e2 JG |
431 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
432 | * is too small; | |
433 | * With GNU C >= 2.1, snprintf returns the required size | |
434 | * (excluding closing null) | |
08a9c49f | 435 | */ |
28ab034a JG |
436 | ret = snprintf(sessiond_sock_path, |
437 | sizeof(sessiond_sock_path), | |
438 | DEFAULT_HOME_CLIENT_UNIX_SOCK, | |
439 | utils_get_home_dir()); | |
08a9c49f | 440 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 441 | goto error; |
947308c4 | 442 | } |
947308c4 | 443 | } |
08a9c49f | 444 | end: |
947308c4 | 445 | return 0; |
2f70b271 DG |
446 | |
447 | error: | |
448 | return -1; | |
947308c4 DG |
449 | } |
450 | ||
65beb5ff | 451 | /* |
9ae110e2 | 452 | * Connect to the LTTng session daemon. |
65beb5ff | 453 | * |
3e3665b8 | 454 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 455 | */ |
cd9adb8b | 456 | int connect_sessiond() |
65beb5ff DG |
457 | { |
458 | int ret; | |
459 | ||
460 | ret = set_session_daemon_path(); | |
461 | if (ret < 0) { | |
2f70b271 | 462 | goto error; |
65beb5ff DG |
463 | } |
464 | ||
9ae110e2 | 465 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
466 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
467 | if (ret < 0) { | |
2f70b271 | 468 | goto error; |
65beb5ff DG |
469 | } |
470 | ||
3e3665b8 | 471 | return ret; |
2f70b271 DG |
472 | |
473 | error: | |
474 | return -1; | |
65beb5ff DG |
475 | } |
476 | ||
cd9adb8b | 477 | static void reset_global_sessiond_connection_state() |
3e3665b8 JG |
478 | { |
479 | sessiond_socket = -1; | |
480 | connected = 0; | |
481 | } | |
482 | ||
65beb5ff | 483 | /* |
1c8d13c8 | 484 | * Clean disconnect from the session daemon. |
9ae110e2 | 485 | * |
1c8d13c8 | 486 | * On success, return 0. On error, return -1. |
65beb5ff | 487 | */ |
cd9adb8b | 488 | static int disconnect_sessiond() |
65beb5ff DG |
489 | { |
490 | int ret = 0; | |
491 | ||
492 | if (connected) { | |
493 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 494 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
495 | } |
496 | ||
497 | return ret; | |
498 | } | |
499 | ||
28ab034a | 500 | static int recv_sessiond_optional_data(size_t len, void **user_buf, size_t *user_len) |
795a978d PP |
501 | { |
502 | int ret = 0; | |
cd9adb8b | 503 | char *buf = nullptr; |
795a978d PP |
504 | |
505 | if (len) { | |
506 | if (!user_len) { | |
507 | ret = -LTTNG_ERR_INVALID; | |
508 | goto end; | |
509 | } | |
510 | ||
64803277 | 511 | buf = zmalloc<char>(len); |
795a978d PP |
512 | if (!buf) { |
513 | ret = -ENOMEM; | |
514 | goto end; | |
515 | } | |
516 | ||
517 | ret = recv_data_sessiond(buf, len); | |
518 | if (ret < 0) { | |
519 | goto end; | |
520 | } | |
521 | ||
522 | if (!user_buf) { | |
523 | ret = -LTTNG_ERR_INVALID; | |
524 | goto end; | |
525 | } | |
526 | ||
527 | /* Move ownership of command header buffer to user. */ | |
528 | *user_buf = buf; | |
cd9adb8b | 529 | buf = nullptr; |
795a978d PP |
530 | *user_len = len; |
531 | } else { | |
532 | /* No command header. */ | |
533 | if (user_len) { | |
534 | *user_len = 0; | |
535 | } | |
536 | ||
537 | if (user_buf) { | |
cd9adb8b | 538 | *user_buf = nullptr; |
795a978d PP |
539 | } |
540 | } | |
541 | ||
542 | end: | |
543 | free(buf); | |
544 | return ret; | |
545 | } | |
546 | ||
35a6fdb7 | 547 | /* |
cd80958d | 548 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
549 | * Takes extra var. len. data and file descriptors as input to send to the |
550 | * session daemon. | |
65beb5ff | 551 | * |
af87c45a | 552 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 553 | */ |
a04d53fc | 554 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
28ab034a JG |
555 | const int *fds, |
556 | size_t nb_fd, | |
557 | const void *vardata, | |
558 | size_t vardata_len, | |
559 | void **user_payload_buf, | |
560 | void **user_cmd_header_buf, | |
561 | size_t *user_cmd_header_len) | |
65beb5ff DG |
562 | { |
563 | int ret; | |
795a978d | 564 | size_t payload_len; |
cd80958d | 565 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
566 | |
567 | ret = connect_sessiond(); | |
568 | if (ret < 0) { | |
2f70b271 | 569 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 570 | goto end; |
3e3665b8 JG |
571 | } else { |
572 | sessiond_socket = ret; | |
573 | connected = 1; | |
65beb5ff DG |
574 | } |
575 | ||
cd80958d | 576 | ret = send_session_msg(lsm); |
65beb5ff | 577 | if (ret < 0) { |
2f70b271 | 578 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
579 | goto end; |
580 | } | |
53a80697 | 581 | /* Send var len data */ |
795a978d | 582 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 583 | if (ret < 0) { |
2f70b271 | 584 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
585 | goto end; |
586 | } | |
65beb5ff | 587 | |
a04d53fc FD |
588 | /* Send fds */ |
589 | ret = send_session_fds(fds, nb_fd); | |
590 | if (ret < 0) { | |
591 | /* Ret value is a valid lttng error code. */ | |
592 | goto end; | |
593 | } | |
594 | ||
65beb5ff DG |
595 | /* Get header from data transmission */ |
596 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
597 | if (ret < 0) { | |
2f70b271 | 598 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
599 | goto end; |
600 | } | |
601 | ||
602 | /* Check error code if OK */ | |
f73fabfd | 603 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
604 | ret = -llm.ret_code; |
605 | goto end; | |
606 | } | |
607 | ||
795a978d | 608 | /* Get command header from data transmission */ |
28ab034a JG |
609 | ret = recv_sessiond_optional_data( |
610 | llm.cmd_header_size, user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 611 | if (ret < 0) { |
65beb5ff DG |
612 | goto end; |
613 | } | |
614 | ||
795a978d | 615 | /* Get payload from data transmission */ |
28ab034a | 616 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, &payload_len); |
795a978d | 617 | if (ret < 0) { |
83009e5e DG |
618 | goto end; |
619 | } | |
620 | ||
795a978d | 621 | ret = llm.data_size; |
65beb5ff DG |
622 | |
623 | end: | |
624 | disconnect_sessiond(); | |
625 | return ret; | |
626 | } | |
627 | ||
28ab034a | 628 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, struct lttng_payload *reply) |
e368fb43 JG |
629 | { |
630 | int ret; | |
631 | struct lttcomm_lttng_msg llm; | |
fe489250 | 632 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 | 633 | |
a0377dfe FD |
634 | LTTNG_ASSERT(reply->buffer.size == 0); |
635 | LTTNG_ASSERT(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); | |
e368fb43 JG |
636 | |
637 | ret = connect_sessiond(); | |
638 | if (ret < 0) { | |
639 | ret = -LTTNG_ERR_NO_SESSIOND; | |
640 | goto end; | |
641 | } else { | |
642 | sessiond_socket = ret; | |
643 | connected = 1; | |
644 | } | |
645 | ||
646 | /* Send command to session daemon */ | |
28ab034a JG |
647 | ret = lttcomm_send_creds_unix_sock( |
648 | sessiond_socket, message->buffer.data, message->buffer.size); | |
e368fb43 JG |
649 | if (ret < 0) { |
650 | ret = -LTTNG_ERR_FATAL; | |
651 | goto end; | |
652 | } | |
653 | ||
fe489250 | 654 | if (fd_count > 0) { |
28ab034a | 655 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, message); |
fe489250 JG |
656 | if (ret < 0) { |
657 | ret = -LTTNG_ERR_FATAL; | |
658 | goto end; | |
659 | } | |
e368fb43 JG |
660 | } |
661 | ||
662 | /* Get header from data transmission */ | |
663 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
664 | if (ret < 0) { | |
665 | /* Ret value is a valid lttng error code. */ | |
666 | goto end; | |
667 | } | |
668 | ||
669 | llm = *((typeof(llm) *) reply->buffer.data); | |
670 | ||
671 | /* Check error code if OK */ | |
672 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
673 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
674 | /* Invalid error code received. */ | |
675 | ret = -LTTNG_ERR_UNK; | |
676 | } else { | |
677 | ret = -llm.ret_code; | |
678 | } | |
e368fb43 JG |
679 | goto end; |
680 | } | |
681 | ||
682 | if (llm.cmd_header_size > 0) { | |
683 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
684 | if (ret < 0) { | |
685 | goto end; | |
686 | } | |
687 | } | |
688 | ||
689 | /* Get command header from data transmission */ | |
690 | if (llm.data_size > 0) { | |
691 | ret = recv_payload_sessiond(reply, llm.data_size); | |
692 | if (ret < 0) { | |
693 | goto end; | |
694 | } | |
695 | } | |
696 | ||
697 | if (llm.fd_count > 0) { | |
28ab034a | 698 | ret = lttcomm_recv_payload_fds_unix_sock(sessiond_socket, llm.fd_count, reply); |
fe489250 | 699 | if (ret < 0) { |
e368fb43 JG |
700 | goto end; |
701 | } | |
702 | } | |
703 | ||
704 | /* Don't return the llm header to the caller. */ | |
28ab034a JG |
705 | memmove(reply->buffer.data, |
706 | reply->buffer.data + sizeof(llm), | |
707 | reply->buffer.size - sizeof(llm)); | |
708 | ret = lttng_dynamic_buffer_set_size(&reply->buffer, reply->buffer.size - sizeof(llm)); | |
e368fb43 JG |
709 | if (ret) { |
710 | /* Can't happen as size is reduced. */ | |
711 | abort(); | |
712 | } | |
713 | ||
714 | ret = reply->buffer.size; | |
715 | ||
716 | end: | |
717 | disconnect_sessiond(); | |
718 | return ret; | |
719 | } | |
720 | ||
9f19cc17 | 721 | /* |
cd80958d | 722 | * Create lttng handle and return pointer. |
9ae110e2 | 723 | * |
1c8d13c8 | 724 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 725 | */ |
28ab034a | 726 | struct lttng_handle *lttng_create_handle(const char *session_name, struct lttng_domain *domain) |
9f19cc17 | 727 | { |
e1b624d0 | 728 | int ret; |
cd9adb8b | 729 | struct lttng_handle *handle = nullptr; |
2f70b271 | 730 | |
64803277 | 731 | handle = zmalloc<lttng_handle>(); |
cd9adb8b | 732 | if (handle == nullptr) { |
2f70b271 | 733 | PERROR("malloc handle"); |
cd80958d DG |
734 | goto end; |
735 | } | |
736 | ||
737 | /* Copy session name */ | |
28ab034a | 738 | ret = lttng_strncpy(handle->session_name, session_name ?: "", sizeof(handle->session_name)); |
e1b624d0 JG |
739 | if (ret) { |
740 | goto error; | |
741 | } | |
cd80958d | 742 | |
95681498 JG |
743 | /* Copy lttng domain or leave initialized to 0. */ |
744 | if (domain) { | |
745 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
746 | } | |
cd80958d DG |
747 | |
748 | end: | |
749 | return handle; | |
e1b624d0 JG |
750 | error: |
751 | free(handle); | |
cd9adb8b | 752 | return nullptr; |
cd80958d DG |
753 | } |
754 | ||
755 | /* | |
756 | * Destroy handle by free(3) the pointer. | |
757 | */ | |
758 | void lttng_destroy_handle(struct lttng_handle *handle) | |
759 | { | |
0e428499 | 760 | free(handle); |
eb354453 DG |
761 | } |
762 | ||
d9800920 DG |
763 | /* |
764 | * Register an outside consumer. | |
9ae110e2 | 765 | * |
1c8d13c8 | 766 | * Returns size of returned session payload data or a negative error code. |
d9800920 | 767 | */ |
28ab034a | 768 | int lttng_register_consumer(struct lttng_handle *handle, const char *socket_path) |
d9800920 | 769 | { |
e1b624d0 | 770 | int ret; |
d9800920 DG |
771 | struct lttcomm_session_msg lsm; |
772 | ||
cd9adb8b | 773 | if (handle == nullptr || socket_path == nullptr) { |
e1b624d0 JG |
774 | ret = -LTTNG_ERR_INVALID; |
775 | goto end; | |
2f70b271 DG |
776 | } |
777 | ||
53efb85a | 778 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 779 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGISTER_CONSUMER; |
28ab034a | 780 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
781 | if (ret) { |
782 | ret = -LTTNG_ERR_INVALID; | |
783 | goto end; | |
784 | } | |
785 | ||
60160d2a | 786 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 787 | |
28ab034a | 788 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, sizeof(lsm.u.reg.path)); |
e1b624d0 JG |
789 | if (ret) { |
790 | ret = -LTTNG_ERR_INVALID; | |
791 | goto end; | |
792 | } | |
d9800920 | 793 | |
cd9adb8b | 794 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
e1b624d0 JG |
795 | end: |
796 | return ret; | |
d9800920 DG |
797 | } |
798 | ||
1df4dedd | 799 | /* |
9ae110e2 JG |
800 | * Start tracing for all traces of the session. |
801 | * | |
802 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 803 | */ |
6a4f824d | 804 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 805 | { |
e1b624d0 | 806 | int ret; |
cd80958d DG |
807 | struct lttcomm_session_msg lsm; |
808 | ||
cd9adb8b | 809 | if (session_name == nullptr) { |
e1b624d0 JG |
810 | ret = -LTTNG_ERR_INVALID; |
811 | goto end; | |
cd80958d DG |
812 | } |
813 | ||
53efb85a | 814 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 815 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_START_TRACE; |
6a4f824d | 816 | |
28ab034a | 817 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
818 | if (ret) { |
819 | ret = -LTTNG_ERR_INVALID; | |
820 | goto end; | |
821 | } | |
cd80958d | 822 | |
cd9adb8b | 823 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
e1b624d0 JG |
824 | end: |
825 | return ret; | |
f3ed775e | 826 | } |
1df4dedd DG |
827 | |
828 | /* | |
38ee087f | 829 | * Stop tracing for all traces of the session. |
f3ed775e | 830 | */ |
38ee087f | 831 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 832 | { |
38ee087f | 833 | int ret, data_ret; |
cd80958d DG |
834 | struct lttcomm_session_msg lsm; |
835 | ||
cd9adb8b | 836 | if (session_name == nullptr) { |
e1b624d0 JG |
837 | ret = -LTTNG_ERR_INVALID; |
838 | goto error; | |
6a4f824d DG |
839 | } |
840 | ||
53efb85a | 841 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 842 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_STOP_TRACE; |
6a4f824d | 843 | |
28ab034a | 844 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
845 | if (ret) { |
846 | ret = -LTTNG_ERR_INVALID; | |
847 | goto error; | |
848 | } | |
cd80958d | 849 | |
cd9adb8b | 850 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
38ee087f DG |
851 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
852 | goto error; | |
853 | } | |
854 | ||
855 | if (!wait) { | |
856 | goto end; | |
857 | } | |
858 | ||
38ee087f DG |
859 | /* Check for data availability */ |
860 | do { | |
6d805429 | 861 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
862 | if (data_ret < 0) { |
863 | /* Return the data available call error. */ | |
864 | ret = data_ret; | |
865 | goto error; | |
866 | } | |
867 | ||
868 | /* | |
9ae110e2 JG |
869 | * Data sleep time before retrying (in usec). Don't sleep if the |
870 | * call returned value indicates availability. | |
38ee087f | 871 | */ |
6d805429 | 872 | if (data_ret) { |
c8f61fd4 | 873 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 874 | } |
6d805429 | 875 | } while (data_ret != 0); |
38ee087f | 876 | |
38ee087f DG |
877 | end: |
878 | error: | |
879 | return ret; | |
880 | } | |
881 | ||
882 | /* | |
883 | * Stop tracing and wait for data availability. | |
884 | */ | |
885 | int lttng_stop_tracing(const char *session_name) | |
886 | { | |
887 | return _lttng_stop_tracing(session_name, 1); | |
888 | } | |
889 | ||
890 | /* | |
891 | * Stop tracing but _don't_ wait for data availability. | |
892 | */ | |
893 | int lttng_stop_tracing_no_wait(const char *session_name) | |
894 | { | |
895 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
896 | } |
897 | ||
898 | /* | |
601d5acf DG |
899 | * Add context to a channel. |
900 | * | |
901 | * If the given channel is NULL, add the contexts to all channels. | |
902 | * The event_name param is ignored. | |
af87c45a DG |
903 | * |
904 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 905 | */ |
cd80958d | 906 | int lttng_add_context(struct lttng_handle *handle, |
28ab034a JG |
907 | struct lttng_event_context *ctx, |
908 | const char *event_name __attribute__((unused)), | |
909 | const char *channel_name) | |
d65106b1 | 910 | { |
2001793c | 911 | int ret; |
1c9a0b0e | 912 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 913 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_ADD_CONTEXT, |
1c9a0b0e MJ |
914 | .session = {}, |
915 | .domain = {}, | |
916 | .u = {}, | |
917 | .fd_count = 0, | |
918 | }; | |
26e1c61f JR |
919 | struct lttng_payload payload; |
920 | ||
921 | lttng_payload_init(&payload); | |
cd80958d | 922 | |
9ae110e2 | 923 | /* Safety check. Both are mandatory. */ |
cd9adb8b | 924 | if (handle == nullptr || ctx == nullptr) { |
2001793c JG |
925 | ret = -LTTNG_ERR_INVALID; |
926 | goto end; | |
cd80958d DG |
927 | } |
928 | ||
26e1c61f JR |
929 | ret = lttng_dynamic_buffer_set_size(&payload.buffer, sizeof(lsm)); |
930 | if (ret) { | |
931 | ret = -LTTNG_ERR_NOMEM; | |
932 | goto end; | |
933 | } | |
cd80958d | 934 | |
85076754 | 935 | /* If no channel name, send empty string. */ |
28ab034a JG |
936 | ret = lttng_strncpy( |
937 | lsm.u.context.channel_name, channel_name ?: "", sizeof(lsm.u.context.channel_name)); | |
e1b624d0 JG |
938 | if (ret) { |
939 | ret = -LTTNG_ERR_INVALID; | |
940 | goto end; | |
85076754 | 941 | } |
cd80958d | 942 | |
60160d2a | 943 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
28ab034a | 944 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
945 | if (ret) { |
946 | ret = -LTTNG_ERR_INVALID; | |
947 | goto end; | |
948 | } | |
cd80958d | 949 | |
26e1c61f JR |
950 | ret = lttng_event_context_serialize(ctx, &payload); |
951 | if (ret) { | |
952 | ret = -LTTNG_ERR_INVALID; | |
953 | goto end; | |
954 | } | |
2001793c | 955 | |
26e1c61f | 956 | lsm.u.context.length = payload.buffer.size - sizeof(lsm); |
2001793c | 957 | |
26e1c61f JR |
958 | /* Update message header. */ |
959 | memcpy(payload.buffer.data, &lsm, sizeof(lsm)); | |
2001793c | 960 | |
26e1c61f JR |
961 | { |
962 | struct lttng_payload reply; | |
963 | struct lttng_payload_view payload_view = | |
28ab034a | 964 | lttng_payload_view_from_payload(&payload, 0, -1); |
2001793c | 965 | |
26e1c61f JR |
966 | lttng_payload_init(&reply); |
967 | ret = lttng_ctl_ask_sessiond_payload(&payload_view, &reply); | |
968 | lttng_payload_reset(&reply); | |
969 | if (ret) { | |
2001793c JG |
970 | goto end; |
971 | } | |
2001793c | 972 | } |
46f44e2a | 973 | |
2001793c | 974 | end: |
26e1c61f | 975 | lttng_payload_reset(&payload); |
2001793c | 976 | return ret; |
d65106b1 DG |
977 | } |
978 | ||
f3ed775e | 979 | /* |
9ae110e2 JG |
980 | * Enable event(s) for a channel. |
981 | * | |
982 | * If no event name is specified, all events are enabled. | |
983 | * If no channel name is specified, the default 'channel0' is used. | |
984 | * | |
985 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 986 | */ |
cd80958d | 987 | int lttng_enable_event(struct lttng_handle *handle, |
28ab034a JG |
988 | struct lttng_event *ev, |
989 | const char *channel_name) | |
1df4dedd | 990 | { |
cd9adb8b | 991 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, nullptr, 0, nullptr); |
1df4dedd DG |
992 | } |
993 | ||
53a80697 | 994 | /* |
025faf73 | 995 | * Create or enable an event with a filter expression. |
178191b3 | 996 | * |
53a80697 MD |
997 | * Return negative error value on error. |
998 | * Return size of returned session payload data if OK. | |
999 | */ | |
025faf73 | 1000 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
28ab034a JG |
1001 | struct lttng_event *event, |
1002 | const char *channel_name, | |
1003 | const char *filter_expression) | |
53a80697 | 1004 | { |
28ab034a | 1005 | return lttng_enable_event_with_exclusions( |
cd9adb8b | 1006 | handle, event, channel_name, filter_expression, 0, nullptr); |
53a80697 MD |
1007 | } |
1008 | ||
347c5ab5 | 1009 | /* |
0e115563 | 1010 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1011 | * NULL if not applicable. |
1012 | * | |
1013 | * An event with NO loglevel and the name is * will return NULL. | |
1014 | */ | |
47abf22b MJ |
1015 | static char * |
1016 | set_agent_filter(const char *filter, struct lttng_event *ev, struct lttng_domain *domain) | |
347c5ab5 DG |
1017 | { |
1018 | int err; | |
cd9adb8b | 1019 | char *agent_filter = nullptr; |
347c5ab5 | 1020 | |
a0377dfe | 1021 | LTTNG_ASSERT(ev); |
47abf22b | 1022 | LTTNG_ASSERT(domain); |
347c5ab5 DG |
1023 | |
1024 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1025 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1026 | if (filter) { |
28ab034a JG |
1027 | err = asprintf( |
1028 | &agent_filter, "(%s) && (logger_name == \"%s\")", filter, ev->name); | |
347c5ab5 | 1029 | } else { |
0e115563 | 1030 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1031 | } |
1032 | if (err < 0) { | |
1033 | PERROR("asprintf"); | |
6a556f7b | 1034 | goto error; |
347c5ab5 DG |
1035 | } |
1036 | } | |
1037 | ||
47abf22b | 1038 | /* Add loglevel filtering if any for the agent domains. */ |
347c5ab5 | 1039 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { |
b53d4e59 | 1040 | const char *op; |
347c5ab5 DG |
1041 | |
1042 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
47abf22b MJ |
1043 | /* |
1044 | * Log4j2 is the only agent domain for which more severe | |
1045 | * logging levels have a lower numerical value. | |
1046 | */ | |
1047 | if (domain->type == LTTNG_DOMAIN_LOG4J2) { | |
1048 | op = "<="; | |
1049 | } else { | |
1050 | op = ">="; | |
1051 | } | |
347c5ab5 DG |
1052 | } else { |
1053 | op = "=="; | |
1054 | } | |
1055 | ||
0e115563 | 1056 | if (filter || agent_filter) { |
6a556f7b JG |
1057 | char *new_filter; |
1058 | ||
28ab034a JG |
1059 | err = asprintf(&new_filter, |
1060 | "(%s) && (int_loglevel %s %d)", | |
1061 | agent_filter ? agent_filter : filter, | |
1062 | op, | |
1063 | ev->loglevel); | |
0e115563 DG |
1064 | if (agent_filter) { |
1065 | free(agent_filter); | |
6a556f7b | 1066 | } |
0e115563 | 1067 | agent_filter = new_filter; |
347c5ab5 | 1068 | } else { |
28ab034a | 1069 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, ev->loglevel); |
347c5ab5 DG |
1070 | } |
1071 | if (err < 0) { | |
1072 | PERROR("asprintf"); | |
6a556f7b | 1073 | goto error; |
347c5ab5 DG |
1074 | } |
1075 | } | |
1076 | ||
0e115563 | 1077 | return agent_filter; |
6a556f7b | 1078 | error: |
0e115563 | 1079 | free(agent_filter); |
cd9adb8b | 1080 | return nullptr; |
347c5ab5 DG |
1081 | } |
1082 | ||
93deb080 JI |
1083 | /* |
1084 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1085 | * If no event name is specified, all events are enabled. | |
1086 | * If no channel name is specified, the default name is used. | |
1087 | * If filter expression is not NULL, the filter is set for the event. | |
1088 | * If exclusion count is not zero, the exclusions are set for the event. | |
1089 | * Returns size of returned session payload data or a negative error code. | |
1090 | */ | |
1091 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
28ab034a JG |
1092 | struct lttng_event *ev, |
1093 | const char *channel_name, | |
1094 | const char *original_filter_expression, | |
1095 | int exclusion_count, | |
1096 | char **exclusion_list) | |
93deb080 | 1097 | { |
1c9a0b0e | 1098 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 1099 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_ENABLE_EVENT, |
1c9a0b0e MJ |
1100 | .session = {}, |
1101 | .domain = {}, | |
1102 | .u = {}, | |
1103 | .fd_count = 0, | |
1104 | }; | |
e368fb43 | 1105 | struct lttng_payload payload; |
8ddd72ef | 1106 | int ret = 0; |
137b9942 | 1107 | unsigned int free_filter_expression = 0; |
cd9adb8b | 1108 | struct filter_parser_ctx *ctx = nullptr; |
8ddd72ef | 1109 | size_t bytecode_len = 0; |
ec005ec6 | 1110 | |
6a0838b7 YL |
1111 | /* |
1112 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1113 | * a variable-length payload from where to send the data. |
6a0838b7 | 1114 | */ |
e368fb43 | 1115 | lttng_payload_init(&payload); |
ec005ec6 | 1116 | |
e9efbcd3 JG |
1117 | /* |
1118 | * Cast as non-const since we may replace the filter expression | |
1119 | * by a dynamically allocated string. Otherwise, the original | |
1120 | * string is not modified. | |
1121 | */ | |
1122 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 | 1123 | |
cd9adb8b | 1124 | if (handle == nullptr || ev == nullptr) { |
137b9942 DG |
1125 | ret = -LTTNG_ERR_INVALID; |
1126 | goto error; | |
93deb080 JI |
1127 | } |
1128 | ||
9ae110e2 JG |
1129 | /* |
1130 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1131 | * anyway, so treat this corner-case early to eliminate |
1132 | * lttng_fmemopen error for 0-byte allocation. | |
1133 | */ | |
1134 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1135 | ret = -LTTNG_ERR_INVALID; |
1136 | goto error; | |
93deb080 JI |
1137 | } |
1138 | ||
18a720cd | 1139 | if (ev->name[0] == '\0') { |
e1b624d0 JG |
1140 | /* Enable all events. */ |
1141 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
a0377dfe | 1142 | LTTNG_ASSERT(ret == 0); |
6565421f | 1143 | } |
93deb080 | 1144 | |
9ae110e2 | 1145 | /* Parse filter expression. */ |
cd9adb8b | 1146 | if (filter_expression != nullptr || handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a | 1147 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
47abf22b | 1148 | handle->domain.type == LTTNG_DOMAIN_LOG4J2 || |
28ab034a | 1149 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { |
5cdb6027 | 1150 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a | 1151 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
47abf22b | 1152 | handle->domain.type == LTTNG_DOMAIN_LOG4J2 || |
28ab034a | 1153 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { |
0e115563 | 1154 | char *agent_filter; |
64226865 | 1155 | |
8ddd72ef | 1156 | /* Setup agent filter if needed. */ |
47abf22b | 1157 | agent_filter = set_agent_filter(filter_expression, ev, &handle->domain); |
0e115563 | 1158 | if (!agent_filter) { |
137b9942 | 1159 | if (!filter_expression) { |
9ae110e2 | 1160 | /* |
47abf22b | 1161 | * No agent and no filter, just skip |
9ae110e2 JG |
1162 | * everything below. |
1163 | */ | |
8ddd72ef | 1164 | goto serialize; |
137b9942 | 1165 | } |
64226865 DG |
1166 | } else { |
1167 | /* | |
9ae110e2 JG |
1168 | * With an agent filter, the original filter has |
1169 | * been added to it thus replace the filter | |
1170 | * expression. | |
64226865 | 1171 | */ |
0e115563 | 1172 | filter_expression = agent_filter; |
e9efbcd3 | 1173 | free_filter_expression = 1; |
9b21e6d5 | 1174 | } |
9b21e6d5 | 1175 | } |
93deb080 | 1176 | |
28ab034a | 1177 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == LTTNG_FILTER_MAX_LEN) { |
8ddd72ef JR |
1178 | ret = -LTTNG_ERR_FILTER_INVAL; |
1179 | goto error; | |
1180 | } | |
1181 | ||
e4d2f27a | 1182 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1183 | if (ret) { |
8ddd72ef | 1184 | goto error; |
93deb080 | 1185 | } |
e4d2f27a | 1186 | |
28ab034a | 1187 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + sizeof(ctx->bytecode->b); |
8ddd72ef JR |
1188 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { |
1189 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1190 | goto error; | |
1191 | } | |
6b453b5e JG |
1192 | } |
1193 | ||
8ddd72ef | 1194 | serialize: |
28ab034a JG |
1195 | ret = lttng_event_serialize(ev, |
1196 | exclusion_count, | |
1e0019bb | 1197 | exclusion_list, |
28ab034a JG |
1198 | filter_expression, |
1199 | bytecode_len, | |
cd9adb8b | 1200 | (ctx && bytecode_len) ? &ctx->bytecode->b : nullptr, |
28ab034a | 1201 | &payload); |
15e37663 | 1202 | if (ret) { |
8ddd72ef JR |
1203 | ret = -LTTNG_ERR_INVALID; |
1204 | goto error; | |
6b453b5e | 1205 | } |
137b9942 | 1206 | |
8ddd72ef | 1207 | /* If no channel name, send empty string. */ |
28ab034a JG |
1208 | ret = lttng_strncpy( |
1209 | lsm.u.enable.channel_name, channel_name ?: "", sizeof(lsm.u.enable.channel_name)); | |
8ddd72ef JR |
1210 | if (ret) { |
1211 | ret = -LTTNG_ERR_INVALID; | |
1212 | goto error; | |
6b453b5e | 1213 | } |
15e37663 | 1214 | |
8ddd72ef JR |
1215 | /* Domain */ |
1216 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
15e37663 | 1217 | |
8ddd72ef | 1218 | /* Session name */ |
28ab034a | 1219 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
8ddd72ef JR |
1220 | if (ret) { |
1221 | ret = -LTTNG_ERR_INVALID; | |
1222 | goto error; | |
93deb080 JI |
1223 | } |
1224 | ||
8ddd72ef JR |
1225 | /* Length of the serialized event. */ |
1226 | lsm.u.enable.length = (uint32_t) payload.buffer.size; | |
1227 | ||
e368fb43 | 1228 | { |
28ab034a | 1229 | struct lttng_payload_view view = lttng_payload_view_from_payload(&payload, 0, -1); |
07c4863f | 1230 | const int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1231 | int fd_to_send; |
1232 | ||
1233 | if (fd_count < 0) { | |
8ddd72ef | 1234 | goto error; |
e368fb43 JG |
1235 | } |
1236 | ||
a0377dfe | 1237 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); |
e368fb43 | 1238 | if (fd_count == 1) { |
28ab034a | 1239 | struct fd_handle *h = lttng_payload_view_pop_fd_handle(&view); |
fe489250 | 1240 | |
e2fc8e9d | 1241 | if (!h) { |
8ddd72ef | 1242 | goto error; |
e368fb43 JG |
1243 | } |
1244 | ||
e2fc8e9d SM |
1245 | fd_to_send = fd_handle_get_fd(h); |
1246 | fd_handle_put(h); | |
e368fb43 JG |
1247 | } |
1248 | ||
8ddd72ef JR |
1249 | lsm.fd_count = fd_count; |
1250 | ||
e368fb43 | 1251 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
cd9adb8b | 1252 | fd_count ? &fd_to_send : nullptr, |
28ab034a | 1253 | fd_count, |
cd9adb8b JG |
1254 | view.buffer.size ? view.buffer.data : |
1255 | nullptr, | |
28ab034a | 1256 | view.buffer.size, |
cd9adb8b JG |
1257 | nullptr, |
1258 | nullptr, | |
1259 | nullptr); | |
e368fb43 | 1260 | } |
93deb080 | 1261 | |
8ddd72ef | 1262 | error: |
7ca1dc6f | 1263 | if (filter_expression && ctx) { |
93deb080 JI |
1264 | filter_bytecode_free(ctx); |
1265 | filter_ir_free(ctx); | |
1266 | filter_parser_ctx_free(ctx); | |
7ca1dc6f | 1267 | } |
7ca1dc6f DG |
1268 | if (free_filter_expression) { |
1269 | /* | |
9ae110e2 JG |
1270 | * The filter expression has been replaced and must be freed as |
1271 | * it is not the original filter expression received as a | |
1272 | * parameter. | |
7ca1dc6f DG |
1273 | */ |
1274 | free(filter_expression); | |
93deb080 | 1275 | } |
137b9942 | 1276 | /* |
9ae110e2 JG |
1277 | * Return directly to the caller and don't ask the sessiond since |
1278 | * something went wrong in the parsing of data above. | |
137b9942 | 1279 | */ |
e368fb43 | 1280 | lttng_payload_reset(&payload); |
93deb080 JI |
1281 | return ret; |
1282 | } | |
1283 | ||
6e911cad | 1284 | int lttng_disable_event_ext(struct lttng_handle *handle, |
28ab034a JG |
1285 | struct lttng_event *ev, |
1286 | const char *channel_name, | |
1287 | const char *original_filter_expression) | |
1df4dedd | 1288 | { |
1c9a0b0e | 1289 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 1290 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_DISABLE_EVENT, |
1c9a0b0e MJ |
1291 | .session = {}, |
1292 | .domain = {}, | |
1293 | .u = {}, | |
1294 | .fd_count = 0, | |
1295 | }; | |
8ddd72ef | 1296 | struct lttng_payload payload; |
6e911cad MD |
1297 | int ret = 0; |
1298 | unsigned int free_filter_expression = 0; | |
cd9adb8b | 1299 | struct filter_parser_ctx *ctx = nullptr; |
8ddd72ef JR |
1300 | size_t bytecode_len = 0; |
1301 | ||
1302 | /* | |
1303 | * We have either a filter or some exclusions, so we need to set up | |
1304 | * a variable-length payload from where to send the data. | |
1305 | */ | |
1306 | lttng_payload_init(&payload); | |
1307 | ||
6e911cad MD |
1308 | /* |
1309 | * Cast as non-const since we may replace the filter expression | |
1310 | * by a dynamically allocated string. Otherwise, the original | |
1311 | * string is not modified. | |
1312 | */ | |
1313 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1314 | |
cd9adb8b | 1315 | if (handle == nullptr || ev == nullptr) { |
6e911cad MD |
1316 | ret = -LTTNG_ERR_INVALID; |
1317 | goto error; | |
1318 | } | |
1319 | ||
9ae110e2 JG |
1320 | /* |
1321 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1322 | * anyway, so treat this corner-case early to eliminate |
1323 | * lttng_fmemopen error for 0-byte allocation. | |
1324 | */ | |
1325 | if (filter_expression && filter_expression[0] == '\0') { | |
1326 | ret = -LTTNG_ERR_INVALID; | |
1327 | goto error; | |
cd80958d DG |
1328 | } |
1329 | ||
8ddd72ef | 1330 | /* Parse filter expression. */ |
cd9adb8b | 1331 | if (filter_expression != nullptr || handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a | 1332 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
47abf22b | 1333 | handle->domain.type == LTTNG_DOMAIN_LOG4J2 || |
28ab034a | 1334 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { |
6e911cad | 1335 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
28ab034a | 1336 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
47abf22b | 1337 | handle->domain.type == LTTNG_DOMAIN_LOG4J2 || |
28ab034a | 1338 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { |
0e115563 | 1339 | char *agent_filter; |
6e911cad | 1340 | |
8ddd72ef | 1341 | /* Setup agent filter if needed. */ |
47abf22b | 1342 | agent_filter = set_agent_filter(filter_expression, ev, &handle->domain); |
0e115563 | 1343 | if (!agent_filter) { |
6e911cad | 1344 | if (!filter_expression) { |
9ae110e2 JG |
1345 | /* |
1346 | * No JUL and no filter, just skip | |
1347 | * everything below. | |
1348 | */ | |
8ddd72ef | 1349 | goto serialize; |
6e911cad MD |
1350 | } |
1351 | } else { | |
1352 | /* | |
8ddd72ef | 1353 | * With an agent filter, the original filter has |
9ae110e2 JG |
1354 | * been added to it thus replace the filter |
1355 | * expression. | |
6e911cad | 1356 | */ |
0e115563 | 1357 | filter_expression = agent_filter; |
6e911cad MD |
1358 | free_filter_expression = 1; |
1359 | } | |
1360 | } | |
1361 | ||
28ab034a | 1362 | if (strnlen(filter_expression, LTTNG_FILTER_MAX_LEN) == LTTNG_FILTER_MAX_LEN) { |
8ddd72ef JR |
1363 | ret = -LTTNG_ERR_FILTER_INVAL; |
1364 | goto error; | |
1365 | } | |
1366 | ||
e4d2f27a | 1367 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad | 1368 | if (ret) { |
8ddd72ef | 1369 | goto error; |
6e911cad | 1370 | } |
e4d2f27a | 1371 | |
28ab034a | 1372 | bytecode_len = bytecode_get_len(&ctx->bytecode->b) + sizeof(ctx->bytecode->b); |
8ddd72ef JR |
1373 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { |
1374 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1375 | goto error; | |
1376 | } | |
6e911cad MD |
1377 | } |
1378 | ||
8ddd72ef | 1379 | serialize: |
28ab034a JG |
1380 | ret = lttng_event_serialize(ev, |
1381 | 0, | |
cd9adb8b | 1382 | nullptr, |
28ab034a JG |
1383 | filter_expression, |
1384 | bytecode_len, | |
cd9adb8b | 1385 | (ctx && bytecode_len) ? &ctx->bytecode->b : nullptr, |
28ab034a | 1386 | &payload); |
8ddd72ef JR |
1387 | if (ret) { |
1388 | ret = -LTTNG_ERR_INVALID; | |
1389 | goto error; | |
6e911cad MD |
1390 | } |
1391 | ||
8ddd72ef | 1392 | /* If no channel name, send empty string. */ |
28ab034a JG |
1393 | ret = lttng_strncpy( |
1394 | lsm.u.disable.channel_name, channel_name ?: "", sizeof(lsm.u.disable.channel_name)); | |
8ddd72ef JR |
1395 | if (ret) { |
1396 | ret = -LTTNG_ERR_INVALID; | |
1397 | goto error; | |
6e911cad | 1398 | } |
8ddd72ef JR |
1399 | |
1400 | /* Domain */ | |
1401 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1402 | ||
1403 | /* Session name */ | |
28ab034a | 1404 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
8ddd72ef JR |
1405 | if (ret) { |
1406 | ret = -LTTNG_ERR_INVALID; | |
1407 | goto error; | |
6e911cad MD |
1408 | } |
1409 | ||
8ddd72ef JR |
1410 | /* Length of the serialized event. */ |
1411 | lsm.u.disable.length = (uint32_t) payload.buffer.size; | |
1412 | ||
1413 | { | |
28ab034a | 1414 | struct lttng_payload_view view = lttng_payload_view_from_payload(&payload, 0, -1); |
07c4863f | 1415 | const int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
8ddd72ef JR |
1416 | int fd_to_send; |
1417 | ||
1418 | if (fd_count < 0) { | |
1419 | goto error; | |
1420 | } | |
1421 | ||
1422 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); | |
1423 | if (fd_count == 1) { | |
28ab034a | 1424 | struct fd_handle *h = lttng_payload_view_pop_fd_handle(&view); |
6e911cad | 1425 | |
8ddd72ef JR |
1426 | if (!h) { |
1427 | goto error; | |
1428 | } | |
1429 | ||
1430 | fd_to_send = fd_handle_get_fd(h); | |
1431 | fd_handle_put(h); | |
1432 | } | |
1433 | ||
1434 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
cd9adb8b | 1435 | fd_count ? &fd_to_send : nullptr, |
28ab034a | 1436 | fd_count, |
cd9adb8b JG |
1437 | view.buffer.size ? view.buffer.data : |
1438 | nullptr, | |
28ab034a | 1439 | view.buffer.size, |
cd9adb8b JG |
1440 | nullptr, |
1441 | nullptr, | |
1442 | nullptr); | |
8ddd72ef JR |
1443 | } |
1444 | ||
1445 | error: | |
6e911cad MD |
1446 | if (filter_expression && ctx) { |
1447 | filter_bytecode_free(ctx); | |
1448 | filter_ir_free(ctx); | |
1449 | filter_parser_ctx_free(ctx); | |
1450 | } | |
6e911cad MD |
1451 | if (free_filter_expression) { |
1452 | /* | |
9ae110e2 JG |
1453 | * The filter expression has been replaced and must be freed as |
1454 | * it is not the original filter expression received as a | |
1455 | * parameter. | |
6e911cad MD |
1456 | */ |
1457 | free(filter_expression); | |
1458 | } | |
6e911cad | 1459 | /* |
9ae110e2 JG |
1460 | * Return directly to the caller and don't ask the sessiond since |
1461 | * something went wrong in the parsing of data above. | |
6e911cad | 1462 | */ |
8ddd72ef | 1463 | lttng_payload_reset(&payload); |
6e911cad MD |
1464 | return ret; |
1465 | } | |
1466 | ||
1467 | /* | |
9ae110e2 JG |
1468 | * Disable event(s) of a channel and domain. |
1469 | * If no event name is specified, all events are disabled. | |
1470 | * If no channel name is specified, the default 'channel0' is used. | |
1471 | * Returns size of returned session payload data or a negative error code. | |
6e911cad | 1472 | */ |
28ab034a | 1473 | int lttng_disable_event(struct lttng_handle *handle, const char *name, const char *channel_name) |
6e911cad | 1474 | { |
e1b624d0 | 1475 | int ret; |
6e911cad MD |
1476 | struct lttng_event ev; |
1477 | ||
1478 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1479 | ev.loglevel = -1; |
6e911cad | 1480 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1481 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1482 | if (ret) { | |
1483 | ret = -LTTNG_ERR_INVALID; | |
1484 | goto end; | |
1485 | } | |
1486 | ||
cd9adb8b | 1487 | ret = lttng_disable_event_ext(handle, &ev, channel_name, nullptr); |
e1b624d0 JG |
1488 | end: |
1489 | return ret; | |
1df4dedd DG |
1490 | } |
1491 | ||
cf0bcb51 JG |
1492 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1493 | { | |
cd9adb8b | 1494 | struct lttng_channel *channel = nullptr; |
cf0bcb51 JG |
1495 | |
1496 | if (!domain) { | |
999af9c1 | 1497 | goto end; |
cf0bcb51 JG |
1498 | } |
1499 | ||
1500 | /* Validate domain. */ | |
1501 | switch (domain->type) { | |
1502 | case LTTNG_DOMAIN_UST: | |
1503 | switch (domain->buf_type) { | |
1504 | case LTTNG_BUFFER_PER_UID: | |
1505 | case LTTNG_BUFFER_PER_PID: | |
1506 | break; | |
1507 | default: | |
999af9c1 | 1508 | goto end; |
cf0bcb51 JG |
1509 | } |
1510 | break; | |
1511 | case LTTNG_DOMAIN_KERNEL: | |
1512 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
999af9c1 | 1513 | goto end; |
cf0bcb51 JG |
1514 | } |
1515 | break; | |
1516 | default: | |
999af9c1 | 1517 | goto end; |
cf0bcb51 JG |
1518 | } |
1519 | ||
999af9c1 | 1520 | channel = lttng_channel_create_internal(); |
cf0bcb51 | 1521 | if (!channel) { |
999af9c1 | 1522 | goto end; |
cf0bcb51 JG |
1523 | } |
1524 | ||
cf0bcb51 | 1525 | lttng_channel_set_default_attr(domain, &channel->attr); |
999af9c1 | 1526 | end: |
cf0bcb51 | 1527 | return channel; |
cf0bcb51 JG |
1528 | } |
1529 | ||
1530 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1531 | { | |
1532 | if (!channel) { | |
1533 | return; | |
1534 | } | |
1535 | ||
1536 | if (channel->attr.extended.ptr) { | |
1537 | free(channel->attr.extended.ptr); | |
1538 | } | |
1539 | free(channel); | |
1540 | } | |
1541 | ||
1df4dedd | 1542 | /* |
9ae110e2 JG |
1543 | * Enable channel per domain |
1544 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1545 | */ |
28ab034a | 1546 | int lttng_enable_channel(struct lttng_handle *handle, struct lttng_channel *in_chan) |
a5c5a2bd | 1547 | { |
13dd7782 | 1548 | enum lttng_error_code ret_code; |
e1b624d0 | 1549 | int ret; |
999af9c1 | 1550 | struct lttng_dynamic_buffer buffer; |
cd80958d | 1551 | struct lttcomm_session_msg lsm; |
13dd7782 | 1552 | uint64_t total_buffer_size_needed_per_cpu = 0; |
cd9adb8b | 1553 | struct lttng_channel *channel = nullptr; |
999af9c1 JR |
1554 | |
1555 | lttng_dynamic_buffer_init(&buffer); | |
cd80958d | 1556 | |
9ae110e2 | 1557 | /* NULL arguments are forbidden. No default values. */ |
cd9adb8b | 1558 | if (handle == nullptr || in_chan == nullptr) { |
999af9c1 JR |
1559 | ret = -LTTNG_ERR_INVALID; |
1560 | goto end; | |
cf0bcb51 | 1561 | } |
cd80958d | 1562 | |
09b72f7a FD |
1563 | /* |
1564 | * Verify that the amount of memory required to create the requested | |
1565 | * buffer is available on the system at the moment. | |
1566 | */ | |
28ab034a | 1567 | if (in_chan->attr.num_subbuf > UINT64_MAX / in_chan->attr.subbuf_size) { |
13dd7782 JR |
1568 | /* Overflow */ |
1569 | ret = -LTTNG_ERR_OVERFLOW; | |
1570 | goto end; | |
1571 | } | |
1572 | ||
28ab034a JG |
1573 | total_buffer_size_needed_per_cpu = in_chan->attr.num_subbuf * in_chan->attr.subbuf_size; |
1574 | ret_code = check_enough_available_memory(total_buffer_size_needed_per_cpu); | |
13dd7782 JR |
1575 | if (ret_code != LTTNG_OK) { |
1576 | ret = -ret_code; | |
1577 | goto end; | |
09b72f7a FD |
1578 | } |
1579 | ||
999af9c1 JR |
1580 | /* Copy the channel for easier manipulation. */ |
1581 | channel = lttng_channel_copy(in_chan); | |
1582 | if (!channel) { | |
1583 | ret = -LTTNG_ERR_NOMEM; | |
1584 | goto end; | |
1585 | } | |
1586 | ||
1587 | /* Populate the channel extended attribute if necessary. */ | |
1588 | if (!channel->attr.extended.ptr) { | |
28ab034a | 1589 | struct lttng_channel_extended *extended = zmalloc<lttng_channel_extended>(); |
999af9c1 JR |
1590 | |
1591 | if (!extended) { | |
1592 | ret = -LTTNG_ERR_NOMEM; | |
1593 | goto end; | |
1594 | } | |
64803277 | 1595 | |
28ab034a | 1596 | lttng_channel_set_default_extended_attr(&handle->domain, extended); |
999af9c1 JR |
1597 | channel->attr.extended.ptr = extended; |
1598 | } | |
1599 | ||
1600 | /* Prepare the payload */ | |
1601 | memset(&lsm, 0, sizeof(lsm)); | |
1602 | ||
37a5ef39 | 1603 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_ENABLE_CHANNEL; |
60160d2a | 1604 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1605 | |
28ab034a | 1606 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
1607 | if (ret) { |
1608 | ret = -LTTNG_ERR_INVALID; | |
1609 | goto end; | |
1610 | } | |
cd80958d | 1611 | |
999af9c1 JR |
1612 | ret = lttng_channel_serialize(channel, &buffer); |
1613 | if (ret) { | |
1614 | ret = -LTTNG_ERR_FATAL; | |
1615 | goto end; | |
1616 | } | |
1617 | ||
1618 | lsm.u.channel.length = buffer.size; | |
1619 | ||
cd9adb8b | 1620 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, buffer.size, nullptr); |
e1b624d0 | 1621 | end: |
999af9c1 JR |
1622 | lttng_channel_destroy(channel); |
1623 | lttng_dynamic_buffer_reset(&buffer); | |
e1b624d0 | 1624 | return ret; |
8c0faa1d | 1625 | } |
1df4dedd | 1626 | |
2ef84c95 | 1627 | /* |
9ae110e2 JG |
1628 | * All tracing will be stopped for registered events of the channel. |
1629 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1630 | */ |
cd80958d | 1631 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1632 | { |
e1b624d0 | 1633 | int ret; |
cd80958d DG |
1634 | struct lttcomm_session_msg lsm; |
1635 | ||
9ae110e2 | 1636 | /* Safety check. Both are mandatory. */ |
cd9adb8b | 1637 | if (handle == nullptr || name == nullptr) { |
2f70b271 | 1638 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1639 | } |
1640 | ||
441c16a7 MD |
1641 | memset(&lsm, 0, sizeof(lsm)); |
1642 | ||
37a5ef39 | 1643 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_DISABLE_CHANNEL; |
1df4dedd | 1644 | |
28ab034a | 1645 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1646 | if (ret) { |
1647 | ret = -LTTNG_ERR_INVALID; | |
1648 | goto end; | |
1649 | } | |
9d697d3d | 1650 | |
60160d2a | 1651 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1652 | |
28ab034a | 1653 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
1654 | if (ret) { |
1655 | ret = -LTTNG_ERR_INVALID; | |
1656 | goto end; | |
1657 | } | |
cd80958d | 1658 | |
cd9adb8b | 1659 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
e1b624d0 JG |
1660 | end: |
1661 | return ret; | |
ca95a216 DG |
1662 | } |
1663 | ||
fac6795d | 1664 | /* |
9ae110e2 JG |
1665 | * Lists all available tracepoints of domain. |
1666 | * Sets the contents of the events array. | |
1667 | * Returns the number of lttng_event entries in events; | |
1668 | * on error, returns a negative value. | |
fac6795d | 1669 | */ |
28ab034a | 1670 | int lttng_list_tracepoints(struct lttng_handle *handle, struct lttng_event **events) |
fac6795d | 1671 | { |
28ab034a JG |
1672 | enum lttng_error_code ret_code; |
1673 | int ret, total_payload_received; | |
cd9adb8b | 1674 | char *reception_buffer = nullptr; |
28ab034a | 1675 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 1676 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINTS, |
1c9a0b0e MJ |
1677 | .session = {}, |
1678 | .domain = {}, | |
1679 | .u = {}, | |
1680 | .fd_count = 0, | |
1681 | }; | |
cd9adb8b | 1682 | struct lttcomm_list_command_header *cmd_header = nullptr; |
28ab034a JG |
1683 | size_t cmd_header_len; |
1684 | unsigned int nb_events = 0; | |
8ddd72ef | 1685 | |
cd9adb8b | 1686 | if (handle == nullptr) { |
28ab034a JG |
1687 | ret = -LTTNG_ERR_INVALID; |
1688 | goto end; | |
1689 | } | |
8ddd72ef | 1690 | |
28ab034a | 1691 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
8ddd72ef | 1692 | |
28ab034a | 1693 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
cd9adb8b | 1694 | nullptr, |
28ab034a | 1695 | 0, |
cd9adb8b | 1696 | nullptr, |
28ab034a JG |
1697 | 0, |
1698 | (void **) &reception_buffer, | |
1699 | (void **) &cmd_header, | |
1700 | &cmd_header_len); | |
1701 | if (ret < 0) { | |
1702 | goto end; | |
1703 | } | |
8ddd72ef | 1704 | |
28ab034a | 1705 | total_payload_received = ret; |
8ddd72ef | 1706 | |
28ab034a JG |
1707 | if (!cmd_header) { |
1708 | ret = -LTTNG_ERR_UNK; | |
1709 | goto end; | |
1710 | } | |
8ddd72ef | 1711 | |
28ab034a JG |
1712 | if (cmd_header->count > INT_MAX) { |
1713 | ret = -LTTNG_ERR_OVERFLOW; | |
1714 | goto end; | |
1715 | } | |
8ddd72ef | 1716 | |
28ab034a | 1717 | nb_events = (unsigned int) cmd_header->count; |
fac6795d | 1718 | |
8ddd72ef | 1719 | { |
07c4863f | 1720 | const lttng_buffer_view events_view = |
28ab034a | 1721 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); |
8ddd72ef | 1722 | struct lttng_payload_view events_payload_view = |
28ab034a | 1723 | lttng_payload_view_from_buffer_view(&events_view, 0, -1); |
2a71efd5 | 1724 | |
8ddd72ef | 1725 | ret_code = lttng_events_create_and_flatten_from_payload( |
28ab034a | 1726 | &events_payload_view, nb_events, events); |
8ddd72ef JR |
1727 | if (ret_code != LTTNG_OK) { |
1728 | ret = -ret_code; | |
1729 | goto end; | |
1730 | } | |
eb354453 | 1731 | } |
fac6795d | 1732 | |
8ddd72ef JR |
1733 | ret = (int) nb_events; |
1734 | ||
1735 | end: | |
28ab034a JG |
1736 | free(cmd_header); |
1737 | free(reception_buffer); | |
1738 | return ret; | |
fac6795d DG |
1739 | } |
1740 | ||
f37d259d | 1741 | /* |
9ae110e2 JG |
1742 | * Lists all available tracepoint fields of domain. |
1743 | * Sets the contents of the event field array. | |
1744 | * Returns the number of lttng_event_field entries in events; | |
1745 | * on error, returns a negative value. | |
f37d259d | 1746 | */ |
28ab034a | 1747 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, struct lttng_event_field **fields) |
f37d259d | 1748 | { |
b2d68839 | 1749 | enum lttng_error_code ret_code; |
f37d259d MD |
1750 | int ret; |
1751 | struct lttcomm_session_msg lsm; | |
cd9adb8b | 1752 | const struct lttcomm_list_command_header *cmd_header = nullptr; |
b2d68839 JR |
1753 | unsigned int nb_event_fields = 0; |
1754 | struct lttng_payload reply; | |
f37d259d | 1755 | |
5c5c6942 JG |
1756 | lttng_payload_init(&reply); |
1757 | ||
cd9adb8b | 1758 | if (handle == nullptr) { |
b2d68839 JR |
1759 | ret = -LTTNG_ERR_INVALID; |
1760 | goto end; | |
f37d259d MD |
1761 | } |
1762 | ||
53efb85a | 1763 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 1764 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1765 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1766 | |
b2d68839 JR |
1767 | { |
1768 | lttng_payload_view message_view = | |
28ab034a | 1769 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
b2d68839 JR |
1770 | |
1771 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
1772 | if (ret < 0) { | |
1773 | goto end; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | { | |
28ab034a JG |
1778 | const lttng_buffer_view cmd_header_view = lttng_buffer_view_from_dynamic_buffer( |
1779 | &reply.buffer, 0, sizeof(*cmd_header)); | |
b2d68839 JR |
1780 | |
1781 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { | |
1782 | ret = -LTTNG_ERR_INVALID_PROTOCOL; | |
1783 | goto end; | |
1784 | } | |
1785 | ||
28ab034a | 1786 | cmd_header = (struct lttcomm_list_command_header *) cmd_header_view.data; |
b2d68839 JR |
1787 | } |
1788 | ||
1789 | if (cmd_header->count > INT_MAX) { | |
1790 | ret = -LTTNG_ERR_OVERFLOW; | |
1791 | goto end; | |
f37d259d MD |
1792 | } |
1793 | ||
b2d68839 JR |
1794 | nb_event_fields = cmd_header->count; |
1795 | ||
1796 | { | |
1797 | lttng_payload_view reply_view = | |
28ab034a | 1798 | lttng_payload_view_from_payload(&reply, sizeof(*cmd_header), -1); |
b2d68839 JR |
1799 | |
1800 | ret_code = lttng_event_fields_create_and_flatten_from_payload( | |
28ab034a | 1801 | &reply_view, nb_event_fields, fields); |
b2d68839 JR |
1802 | if (ret_code != LTTNG_OK) { |
1803 | ret = -ret_code; | |
1804 | goto end; | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | ret = nb_event_fields; | |
1809 | ||
1810 | end: | |
5c5c6942 | 1811 | lttng_payload_reset(&reply); |
b2d68839 | 1812 | return ret; |
f37d259d MD |
1813 | } |
1814 | ||
834978fd | 1815 | /* |
9ae110e2 JG |
1816 | * Lists all available kernel system calls. Allocates and sets the contents of |
1817 | * the events array. | |
834978fd | 1818 | * |
9ae110e2 JG |
1819 | * Returns the number of lttng_event entries in events; on error, returns a |
1820 | * negative value. | |
834978fd DG |
1821 | */ |
1822 | int lttng_list_syscalls(struct lttng_event **events) | |
1823 | { | |
28ab034a JG |
1824 | enum lttng_error_code ret_code; |
1825 | int ret, total_payload_received; | |
cd9adb8b | 1826 | char *reception_buffer = nullptr; |
28ab034a | 1827 | struct lttcomm_session_msg lsm = {}; |
cd9adb8b | 1828 | struct lttcomm_list_command_header *cmd_header = nullptr; |
28ab034a JG |
1829 | size_t cmd_header_len; |
1830 | uint32_t nb_events = 0; | |
1831 | ||
1832 | if (!events) { | |
1833 | ret = -LTTNG_ERR_INVALID; | |
1834 | goto end; | |
1835 | } | |
1836 | ||
1837 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_SYSCALLS; | |
1838 | /* Force kernel domain for system calls. */ | |
1839 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1840 | ||
1841 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
cd9adb8b | 1842 | nullptr, |
28ab034a | 1843 | 0, |
cd9adb8b | 1844 | nullptr, |
28ab034a JG |
1845 | 0, |
1846 | (void **) &reception_buffer, | |
1847 | (void **) &cmd_header, | |
1848 | &cmd_header_len); | |
1849 | if (ret < 0) { | |
1850 | goto end; | |
1851 | } | |
1852 | total_payload_received = ret; | |
1853 | ||
1854 | if (!cmd_header) { | |
1855 | ret = -LTTNG_ERR_UNK; | |
1856 | goto end; | |
1857 | } | |
1858 | ||
1859 | if (cmd_header->count > INT_MAX) { | |
1860 | ret = -LTTNG_ERR_OVERFLOW; | |
1861 | goto end; | |
1862 | } | |
1863 | ||
1864 | nb_events = (unsigned int) cmd_header->count; | |
1865 | ||
1866 | { | |
1867 | const struct lttng_buffer_view events_view = | |
1868 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); | |
8ddd72ef | 1869 | struct lttng_payload_view events_payload_view = |
28ab034a | 1870 | lttng_payload_view_from_buffer_view(&events_view, 0, -1); |
8ddd72ef | 1871 | |
28ab034a JG |
1872 | ret_code = lttng_events_create_and_flatten_from_payload( |
1873 | &events_payload_view, nb_events, events); | |
1874 | if (ret_code != LTTNG_OK) { | |
1875 | ret = -ret_code; | |
1876 | goto end; | |
1877 | } | |
1878 | } | |
8ddd72ef | 1879 | |
28ab034a | 1880 | ret = (int) nb_events; |
834978fd | 1881 | |
8ddd72ef | 1882 | end: |
28ab034a JG |
1883 | free(reception_buffer); |
1884 | free(cmd_header); | |
1885 | return ret; | |
834978fd DG |
1886 | } |
1887 | ||
1657e9bb | 1888 | /* |
9ae110e2 | 1889 | * Returns a human readable string describing |
8346beb6 | 1890 | * the error code (positive or negative value). |
1657e9bb | 1891 | */ |
9a745bc7 | 1892 | const char *lttng_strerror(int code) |
1657e9bb | 1893 | { |
8346beb6 PP |
1894 | if (code > 0) { |
1895 | code = -code; | |
1896 | } | |
1897 | ||
f73fabfd | 1898 | return error_get_str(code); |
1657e9bb DG |
1899 | } |
1900 | ||
28ab034a | 1901 | enum lttng_error_code lttng_create_session_ext(struct lttng_session_descriptor *session_descriptor) |
b178f53e JG |
1902 | { |
1903 | enum lttng_error_code ret_code; | |
1904 | struct lttcomm_session_msg lsm = { | |
37a5ef39 | 1905 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_CREATE_SESSION_EXT, |
1c9a0b0e MJ |
1906 | .session = {}, |
1907 | .domain = {}, | |
1908 | .u = {}, | |
1909 | .fd_count = 0, | |
b178f53e | 1910 | }; |
cd9adb8b | 1911 | void *reply = nullptr; |
b178f53e JG |
1912 | struct lttng_buffer_view reply_view; |
1913 | int reply_ret; | |
1914 | bool sessiond_must_generate_ouput; | |
1915 | struct lttng_dynamic_buffer payload; | |
1916 | int ret; | |
1917 | size_t descriptor_size; | |
cd9adb8b | 1918 | struct lttng_session_descriptor *descriptor_reply = nullptr; |
b178f53e JG |
1919 | |
1920 | lttng_dynamic_buffer_init(&payload); | |
1921 | if (!session_descriptor) { | |
1922 | ret_code = LTTNG_ERR_INVALID; | |
1923 | goto end; | |
1924 | } | |
1925 | ||
1926 | sessiond_must_generate_ouput = | |
28ab034a | 1927 | !lttng_session_descriptor_is_output_destination_initialized(session_descriptor); |
b178f53e JG |
1928 | if (sessiond_must_generate_ouput) { |
1929 | const char *home_dir = utils_get_home_dir(); | |
07c4863f | 1930 | const size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; |
b178f53e JG |
1931 | |
1932 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1933 | ret_code = LTTNG_ERR_FATAL; | |
1934 | goto end; | |
1935 | } | |
1936 | ||
1937 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
28ab034a | 1938 | ret = lttng_dynamic_buffer_append(&payload, home_dir, home_dir_len); |
b178f53e JG |
1939 | if (ret) { |
1940 | ret_code = LTTNG_ERR_NOMEM; | |
1941 | goto end; | |
1942 | } | |
1943 | } | |
1944 | ||
1945 | descriptor_size = payload.size; | |
28ab034a | 1946 | ret = lttng_session_descriptor_serialize(session_descriptor, &payload); |
b178f53e JG |
1947 | if (ret) { |
1948 | ret_code = LTTNG_ERR_INVALID; | |
1949 | goto end; | |
1950 | } | |
1951 | descriptor_size = payload.size - descriptor_size; | |
1952 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1953 | ||
1954 | /* Command returns a session descriptor on success. */ | |
28ab034a JG |
1955 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( |
1956 | &lsm, payload.data, payload.size, &reply); | |
b178f53e | 1957 | if (reply_ret < 0) { |
4bd69c5f | 1958 | ret_code = (lttng_error_code) -reply_ret; |
b178f53e JG |
1959 | goto end; |
1960 | } else if (reply_ret == 0) { | |
1961 | /* Socket unexpectedly closed by the session daemon. */ | |
1962 | ret_code = LTTNG_ERR_FATAL; | |
1963 | goto end; | |
1964 | } | |
1965 | ||
4bd69c5f | 1966 | reply_view = lttng_buffer_view_init((const char *) reply, 0, reply_ret); |
28ab034a | 1967 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, &descriptor_reply); |
b178f53e JG |
1968 | if (ret < 0) { |
1969 | ret_code = LTTNG_ERR_FATAL; | |
1970 | goto end; | |
1971 | } | |
1972 | ret_code = LTTNG_OK; | |
1973 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1974 | end: | |
1975 | free(reply); | |
1976 | lttng_dynamic_buffer_reset(&payload); | |
1977 | lttng_session_descriptor_destroy(descriptor_reply); | |
1978 | return ret_code; | |
1979 | } | |
1980 | ||
aaf97519 | 1981 | /* |
b178f53e | 1982 | * Create a new session using name and url for destination. |
a4b92340 | 1983 | * |
780d4bb8 | 1984 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1985 | */ |
a4b92340 | 1986 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1987 | { |
3dd05a85 | 1988 | int ret; |
a4b92340 | 1989 | ssize_t size; |
cd9adb8b JG |
1990 | struct lttng_uri *uris = nullptr; |
1991 | struct lttng_session_descriptor *descriptor = nullptr; | |
b178f53e | 1992 | enum lttng_error_code ret_code; |
00e2e675 | 1993 | |
b178f53e JG |
1994 | if (!name) { |
1995 | ret = -LTTNG_ERR_INVALID; | |
1996 | goto end; | |
00e2e675 DG |
1997 | } |
1998 | ||
cd9adb8b | 1999 | size = uri_parse_str_urls(url, nullptr, &uris); |
a4b92340 | 2000 | if (size < 0) { |
b178f53e JG |
2001 | ret = -LTTNG_ERR_INVALID; |
2002 | goto end; | |
2003 | } | |
2004 | switch (size) { | |
2005 | case 0: | |
2006 | descriptor = lttng_session_descriptor_create(name); | |
2007 | break; | |
2008 | case 1: | |
2009 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
2010 | ret = -LTTNG_ERR_INVALID; | |
2011 | goto end; | |
2012 | } | |
28ab034a | 2013 | descriptor = lttng_session_descriptor_local_create(name, uris[0].dst.path); |
b178f53e JG |
2014 | break; |
2015 | case 2: | |
cd9adb8b | 2016 | descriptor = lttng_session_descriptor_network_create(name, url, nullptr); |
b178f53e JG |
2017 | break; |
2018 | default: | |
2019 | ret = -LTTNG_ERR_INVALID; | |
2020 | goto end; | |
2021 | } | |
2022 | if (!descriptor) { | |
2023 | ret = -LTTNG_ERR_INVALID; | |
2024 | goto end; | |
00e2e675 | 2025 | } |
b178f53e JG |
2026 | ret_code = lttng_create_session_ext(descriptor); |
2027 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2028 | end: | |
2029 | lttng_session_descriptor_destroy(descriptor); | |
2030 | free(uris); | |
2031 | return ret; | |
2032 | } | |
00e2e675 | 2033 | |
b178f53e JG |
2034 | /* |
2035 | * Create a session exclusively used for snapshot. | |
2036 | * | |
780d4bb8 | 2037 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2038 | */ |
2039 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2040 | { | |
2041 | int ret; | |
2042 | enum lttng_error_code ret_code; | |
2043 | ssize_t size; | |
cd9adb8b JG |
2044 | struct lttng_uri *uris = nullptr; |
2045 | struct lttng_session_descriptor *descriptor = nullptr; | |
a4b92340 | 2046 | |
b178f53e JG |
2047 | if (!name) { |
2048 | ret = -LTTNG_ERR_INVALID; | |
2049 | goto end; | |
2050 | } | |
2051 | ||
cd9adb8b | 2052 | size = uri_parse_str_urls(snapshot_url, nullptr, &uris); |
b178f53e JG |
2053 | if (size < 0) { |
2054 | ret = -LTTNG_ERR_INVALID; | |
2055 | goto end; | |
2056 | } | |
2057 | /* | |
2058 | * If the user does not specify a custom subdir, use the session name. | |
2059 | */ | |
28ab034a JG |
2060 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) { |
2061 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name); | |
b178f53e JG |
2062 | if (ret < 0) { |
2063 | PERROR("Failed to set session name as network destination sub-directory"); | |
2064 | ret = -LTTNG_ERR_FATAL; | |
2065 | goto end; | |
2066 | } else if (ret >= sizeof(uris[0].subdir)) { | |
2067 | /* Truncated output. */ | |
2068 | ret = -LTTNG_ERR_INVALID; | |
2069 | goto end; | |
2070 | } | |
2071 | } | |
3dd05a85 | 2072 | |
b178f53e JG |
2073 | switch (size) { |
2074 | case 0: | |
2075 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
2076 | break; | |
2077 | case 1: | |
2078 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
2079 | ret = -LTTNG_ERR_INVALID; | |
2080 | goto end; | |
2081 | } | |
28ab034a | 2082 | descriptor = lttng_session_descriptor_snapshot_local_create(name, uris[0].dst.path); |
b178f53e JG |
2083 | break; |
2084 | case 2: | |
cd9adb8b JG |
2085 | descriptor = lttng_session_descriptor_snapshot_network_create( |
2086 | name, snapshot_url, nullptr); | |
b178f53e JG |
2087 | break; |
2088 | default: | |
2089 | ret = -LTTNG_ERR_INVALID; | |
2090 | goto end; | |
2091 | } | |
2092 | if (!descriptor) { | |
2093 | ret = -LTTNG_ERR_INVALID; | |
2094 | goto end; | |
2095 | } | |
2096 | ret_code = lttng_create_session_ext(descriptor); | |
2097 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2098 | end: | |
2099 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
2100 | free(uris); |
2101 | return ret; | |
00e2e675 DG |
2102 | } |
2103 | ||
b178f53e JG |
2104 | /* |
2105 | * Create a session exclusively used for live. | |
2106 | * | |
780d4bb8 | 2107 | * Return 0 on success else a negative LTTng error code. |
b178f53e | 2108 | */ |
28ab034a | 2109 | int lttng_create_session_live(const char *name, const char *url, unsigned int timer_interval) |
b178f53e JG |
2110 | { |
2111 | int ret; | |
2112 | enum lttng_error_code ret_code; | |
cd9adb8b | 2113 | struct lttng_session_descriptor *descriptor = nullptr; |
b178f53e JG |
2114 | |
2115 | if (!name) { | |
2116 | ret = -LTTNG_ERR_INVALID; | |
2117 | goto end; | |
2118 | } | |
2119 | ||
2120 | if (url) { | |
2121 | descriptor = lttng_session_descriptor_live_network_create( | |
cd9adb8b | 2122 | name, url, nullptr, timer_interval); |
b178f53e | 2123 | } else { |
28ab034a | 2124 | descriptor = lttng_session_descriptor_live_create(name, timer_interval); |
b178f53e JG |
2125 | } |
2126 | if (!descriptor) { | |
2127 | ret = -LTTNG_ERR_INVALID; | |
2128 | goto end; | |
2129 | } | |
2130 | ret_code = lttng_create_session_ext(descriptor); | |
2131 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2132 | end: | |
2133 | lttng_session_descriptor_destroy(descriptor); | |
2134 | return ret; | |
2135 | } | |
2136 | ||
e20ee7c2 JD |
2137 | /* |
2138 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2139 | * |
2140 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2141 | */ |
2142 | int lttng_destroy_session(const char *session_name) | |
2143 | { | |
2144 | int ret; | |
3e3665b8 JG |
2145 | enum lttng_error_code ret_code; |
2146 | enum lttng_destruction_handle_status status; | |
cd9adb8b | 2147 | struct lttng_destruction_handle *handle = nullptr; |
e20ee7c2 JD |
2148 | |
2149 | /* | |
3e3665b8 JG |
2150 | * Stop the tracing and wait for the data to be |
2151 | * consumed. | |
e20ee7c2 JD |
2152 | */ |
2153 | ret = _lttng_stop_tracing(session_name, 1); | |
2154 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2155 | goto end; | |
2156 | } | |
2157 | ||
3e3665b8 JG |
2158 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2159 | if (ret_code != LTTNG_OK) { | |
2160 | ret = (int) -ret_code; | |
2161 | goto end; | |
2162 | } | |
a0377dfe | 2163 | LTTNG_ASSERT(handle); |
3e3665b8 JG |
2164 | |
2165 | /* Block until the completion of the destruction of the session. */ | |
2166 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2167 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2168 | ret = -LTTNG_ERR_UNK; | |
2169 | goto end; | |
2170 | } | |
2171 | ||
2172 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2173 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2174 | ret = -LTTNG_ERR_UNK; | |
2175 | goto end; | |
2176 | } | |
780d4bb8 | 2177 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2178 | end: |
3e3665b8 | 2179 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2180 | return ret; |
2181 | } | |
2182 | ||
2183 | /* | |
2184 | * Destroy the session without waiting for the data. | |
2185 | */ | |
2186 | int lttng_destroy_session_no_wait(const char *session_name) | |
2187 | { | |
3e3665b8 | 2188 | enum lttng_error_code ret_code; |
e20ee7c2 | 2189 | |
cd9adb8b | 2190 | ret_code = lttng_destroy_session_ext(session_name, nullptr); |
3204017e | 2191 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2192 | } |
2193 | ||
57167058 | 2194 | /* |
9ae110e2 JG |
2195 | * Ask the session daemon for all available sessions. |
2196 | * Sets the contents of the sessions array. | |
2197 | * Returns the number of lttng_session entries in sessions; | |
2198 | * on error, returns a negative value. | |
57167058 | 2199 | */ |
b178f53e | 2200 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2201 | { |
ca95a216 | 2202 | int ret; |
cd80958d | 2203 | struct lttcomm_session_msg lsm; |
28ab034a JG |
2204 | const size_t session_size = |
2205 | sizeof(struct lttng_session) + sizeof(struct lttng_session_extended); | |
b178f53e JG |
2206 | size_t session_count, i; |
2207 | struct lttng_session_extended *sessions_extended_begin; | |
cd9adb8b | 2208 | struct lttng_session *sessions = nullptr; |
57167058 | 2209 | |
53efb85a | 2210 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2211 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_SESSIONS; |
985aea18 MD |
2212 | /* |
2213 | * Initialize out_sessions to NULL so it is initialized when | |
2214 | * lttng_list_sessions returns 0, thus allowing *out_sessions to | |
2215 | * be subsequently freed. | |
2216 | */ | |
cd9adb8b | 2217 | *out_sessions = nullptr; |
28ab034a | 2218 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &sessions); |
b178f53e | 2219 | if (ret <= 0) { |
b178f53e JG |
2220 | goto end; |
2221 | } | |
2222 | if (!sessions) { | |
2223 | ret = -LTTNG_ERR_FATAL; | |
2224 | goto end; | |
2225 | } | |
2226 | ||
2227 | if (ret % session_size) { | |
2228 | ret = -LTTNG_ERR_UNK; | |
2229 | free(sessions); | |
b178f53e | 2230 | goto end; |
57167058 | 2231 | } |
b178f53e | 2232 | session_count = (size_t) ret / session_size; |
28ab034a | 2233 | sessions_extended_begin = (struct lttng_session_extended *) (&sessions[session_count]); |
57167058 | 2234 | |
b178f53e JG |
2235 | /* Set extended session info pointers. */ |
2236 | for (i = 0; i < session_count; i++) { | |
2237 | struct lttng_session *session = &sessions[i]; | |
28ab034a | 2238 | struct lttng_session_extended *extended = &(sessions_extended_begin[i]); |
b178f53e JG |
2239 | |
2240 | session->extended.ptr = extended; | |
2241 | } | |
2242 | ||
2243 | ret = (int) session_count; | |
2244 | *out_sessions = sessions; | |
2245 | end: | |
2246 | return ret; | |
2247 | } | |
2248 | ||
28ab034a JG |
2249 | enum lttng_error_code lttng_session_get_creation_time(const struct lttng_session *session, |
2250 | uint64_t *creation_time) | |
b178f53e JG |
2251 | { |
2252 | enum lttng_error_code ret = LTTNG_OK; | |
2253 | struct lttng_session_extended *extended; | |
2254 | ||
2255 | if (!session || !creation_time || !session->extended.ptr) { | |
2256 | ret = LTTNG_ERR_INVALID; | |
2257 | goto end; | |
2258 | } | |
2259 | ||
4bd69c5f | 2260 | extended = (lttng_session_extended *) session->extended.ptr; |
b178f53e JG |
2261 | if (!extended->creation_time.is_set) { |
2262 | /* Not created on the session daemon yet. */ | |
2263 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2264 | goto end; | |
2265 | } | |
2266 | *creation_time = extended->creation_time.value; | |
2267 | end: | |
2268 | return ret; | |
57167058 DG |
2269 | } |
2270 | ||
28ab034a | 2271 | int lttng_set_session_shm_path(const char *session_name, const char *shm_path) |
d7ba1388 | 2272 | { |
e1b624d0 | 2273 | int ret; |
d7ba1388 MD |
2274 | struct lttcomm_session_msg lsm; |
2275 | ||
cd9adb8b | 2276 | if (session_name == nullptr) { |
d7ba1388 MD |
2277 | return -LTTNG_ERR_INVALID; |
2278 | } | |
2279 | ||
2280 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2281 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_SET_SESSION_SHM_PATH; |
d7ba1388 | 2282 | |
28ab034a | 2283 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2284 | if (ret) { |
2285 | ret = -LTTNG_ERR_INVALID; | |
2286 | goto end; | |
2287 | } | |
2288 | ||
28ab034a JG |
2289 | ret = lttng_strncpy( |
2290 | lsm.u.set_shm_path.shm_path, shm_path ?: "", sizeof(lsm.u.set_shm_path.shm_path)); | |
e1b624d0 JG |
2291 | if (ret) { |
2292 | ret = -LTTNG_ERR_INVALID; | |
2293 | goto end; | |
2294 | } | |
d7ba1388 | 2295 | |
cd9adb8b | 2296 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
e1b624d0 JG |
2297 | end: |
2298 | return ret; | |
d7ba1388 MD |
2299 | } |
2300 | ||
9f19cc17 | 2301 | /* |
9ae110e2 JG |
2302 | * Ask the session daemon for all available domains of a session. |
2303 | * Sets the contents of the domains array. | |
2304 | * Returns the number of lttng_domain entries in domains; | |
2305 | * on error, returns a negative value. | |
9f19cc17 | 2306 | */ |
28ab034a | 2307 | int lttng_list_domains(const char *session_name, struct lttng_domain **domains) |
9f19cc17 DG |
2308 | { |
2309 | int ret; | |
cd80958d DG |
2310 | struct lttcomm_session_msg lsm; |
2311 | ||
cd9adb8b | 2312 | if (session_name == nullptr) { |
e1b624d0 JG |
2313 | ret = -LTTNG_ERR_INVALID; |
2314 | goto error; | |
cd80958d | 2315 | } |
9f19cc17 | 2316 | |
53efb85a | 2317 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2318 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_DOMAINS; |
cd80958d | 2319 | |
28ab034a | 2320 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2321 | if (ret) { |
2322 | ret = -LTTNG_ERR_INVALID; | |
2323 | goto error; | |
2324 | } | |
cd80958d | 2325 | |
28ab034a | 2326 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) domains); |
9f19cc17 | 2327 | if (ret < 0) { |
e1b624d0 | 2328 | goto error; |
9f19cc17 DG |
2329 | } |
2330 | ||
2331 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2332 | error: |
2333 | return ret; | |
9f19cc17 DG |
2334 | } |
2335 | ||
2336 | /* | |
9ae110e2 JG |
2337 | * Ask the session daemon for all available channels of a session. |
2338 | * Sets the contents of the channels array. | |
2339 | * Returns the number of lttng_channel entries in channels; | |
2340 | * on error, returns a negative value. | |
9f19cc17 | 2341 | */ |
28ab034a | 2342 | int lttng_list_channels(struct lttng_handle *handle, struct lttng_channel **channels) |
9f19cc17 | 2343 | { |
999af9c1 | 2344 | int ret, total_payload_received; |
cd80958d | 2345 | struct lttcomm_session_msg lsm; |
cd9adb8b | 2346 | char *reception_buffer = nullptr; |
999af9c1 | 2347 | size_t cmd_header_len = 0; |
cd9adb8b | 2348 | struct lttcomm_list_command_header *cmd_header = nullptr; |
999af9c1 JR |
2349 | struct lttng_dynamic_buffer tmp_buffer; |
2350 | ||
2351 | lttng_dynamic_buffer_init(&tmp_buffer); | |
cd80958d | 2352 | |
cd9adb8b | 2353 | if (handle == nullptr) { |
53e367f9 JG |
2354 | ret = -LTTNG_ERR_INVALID; |
2355 | goto end; | |
cd80958d DG |
2356 | } |
2357 | ||
53efb85a | 2358 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2359 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_CHANNELS; |
28ab034a | 2360 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2361 | if (ret) { |
2362 | ret = -LTTNG_ERR_INVALID; | |
2363 | goto end; | |
2364 | } | |
9f19cc17 | 2365 | |
60160d2a | 2366 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2367 | |
28ab034a | 2368 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
cd9adb8b | 2369 | nullptr, |
28ab034a | 2370 | 0, |
cd9adb8b | 2371 | nullptr, |
28ab034a JG |
2372 | 0, |
2373 | (void **) &reception_buffer, | |
2374 | (void **) &cmd_header, | |
2375 | &cmd_header_len); | |
9f19cc17 | 2376 | if (ret < 0) { |
53e367f9 JG |
2377 | goto end; |
2378 | } | |
2379 | ||
999af9c1 JR |
2380 | total_payload_received = ret; |
2381 | ||
2382 | if (cmd_header_len != sizeof(*cmd_header)) { | |
2383 | ret = -LTTNG_ERR_FATAL; | |
53e367f9 | 2384 | goto end; |
9f19cc17 DG |
2385 | } |
2386 | ||
999af9c1 JR |
2387 | if (!cmd_header) { |
2388 | ret = LTTNG_ERR_UNK; | |
2389 | goto end; | |
2390 | } | |
2391 | ||
2392 | if (cmd_header->count > INT_MAX) { | |
2393 | ret = -LTTNG_ERR_OVERFLOW; | |
2394 | goto end; | |
2395 | } | |
53e367f9 | 2396 | |
999af9c1 JR |
2397 | { |
2398 | enum lttng_error_code ret_code; | |
2399 | const struct lttng_buffer_view events_view = | |
28ab034a | 2400 | lttng_buffer_view_init(reception_buffer, 0, total_payload_received); |
999af9c1 JR |
2401 | |
2402 | ret_code = lttng_channels_create_and_flatten_from_buffer( | |
28ab034a | 2403 | &events_view, cmd_header->count, channels); |
999af9c1 JR |
2404 | if (ret_code != LTTNG_OK) { |
2405 | ret = -ret_code; | |
2406 | goto end; | |
2407 | } | |
53e367f9 JG |
2408 | } |
2409 | ||
999af9c1 | 2410 | ret = (int) cmd_header->count; |
53e367f9 | 2411 | end: |
999af9c1 JR |
2412 | free(cmd_header); |
2413 | free(reception_buffer); | |
53e367f9 | 2414 | return ret; |
9f19cc17 DG |
2415 | } |
2416 | ||
2417 | /* | |
9ae110e2 JG |
2418 | * Ask the session daemon for all available events of a session channel. |
2419 | * Sets the contents of the events array. | |
2420 | * Returns the number of lttng_event entries in events; | |
2421 | * on error, returns a negative value. | |
9f19cc17 | 2422 | */ |
cd80958d | 2423 | int lttng_list_events(struct lttng_handle *handle, |
28ab034a JG |
2424 | const char *channel_name, |
2425 | struct lttng_event **events) | |
9f19cc17 DG |
2426 | { |
2427 | int ret; | |
e368fb43 | 2428 | struct lttcomm_session_msg lsm = {}; |
8ddd72ef | 2429 | struct lttng_payload reply; |
e368fb43 | 2430 | struct lttng_payload_view lsm_view = |
28ab034a | 2431 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
8ddd72ef | 2432 | unsigned int nb_events = 0; |
9f19cc17 | 2433 | |
821a8b53 JR |
2434 | lttng_payload_init(&reply); |
2435 | ||
8ddd72ef | 2436 | /* Safety check. An handle and channel name are mandatory. */ |
cd9adb8b | 2437 | if (handle == nullptr || channel_name == nullptr) { |
e368fb43 JG |
2438 | ret = -LTTNG_ERR_INVALID; |
2439 | goto end; | |
cd80958d DG |
2440 | } |
2441 | ||
8ddd72ef | 2442 | /* Initialize command parameters. */ |
37a5ef39 | 2443 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_EVENTS; |
28ab034a | 2444 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2445 | if (ret) { |
2446 | ret = -LTTNG_ERR_INVALID; | |
2447 | goto end; | |
2448 | } | |
2449 | ||
28ab034a | 2450 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2451 | if (ret) { |
2452 | ret = -LTTNG_ERR_INVALID; | |
2453 | goto end; | |
2454 | } | |
2455 | ||
60160d2a | 2456 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2457 | |
8ddd72ef JR |
2458 | /* Execute command against the session daemon. */ |
2459 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
9f19cc17 | 2460 | if (ret < 0) { |
de453daa | 2461 | goto end; |
9f19cc17 DG |
2462 | } |
2463 | ||
e368fb43 | 2464 | { |
cd9adb8b | 2465 | const struct lttcomm_list_command_header *cmd_reply_header = nullptr; |
8ddd72ef | 2466 | const lttng_payload_view cmd_reply_header_view = |
28ab034a | 2467 | lttng_payload_view_from_payload(&reply, 0, sizeof(*cmd_reply_header)); |
8ddd72ef JR |
2468 | |
2469 | if (!lttng_payload_view_is_valid(&cmd_reply_header_view)) { | |
2470 | ret = -LTTNG_ERR_INVALID_PROTOCOL; | |
2471 | goto end; | |
56f0bc67 | 2472 | } |
b4e3ceb9 | 2473 | |
8ddd72ef | 2474 | cmd_reply_header = (const struct lttcomm_list_command_header *) |
28ab034a | 2475 | cmd_reply_header_view.buffer.data; |
8ddd72ef JR |
2476 | if (cmd_reply_header->count > INT_MAX) { |
2477 | ret = -LTTNG_ERR_OVERFLOW; | |
2478 | goto end; | |
2479 | } | |
56f0bc67 | 2480 | |
8ddd72ef | 2481 | nb_events = (unsigned int) cmd_reply_header->count; |
56f0bc67 | 2482 | } |
de453daa | 2483 | |
e368fb43 | 2484 | { |
8ddd72ef JR |
2485 | enum lttng_error_code ret_code; |
2486 | lttng_payload_view cmd_reply_payload = lttng_payload_view_from_payload( | |
28ab034a | 2487 | &reply, sizeof(struct lttcomm_list_command_header), -1); |
56f0bc67 | 2488 | |
8ddd72ef | 2489 | ret_code = lttng_events_create_and_flatten_from_payload( |
28ab034a | 2490 | &cmd_reply_payload, nb_events, events); |
8ddd72ef JR |
2491 | if (ret_code != LTTNG_OK) { |
2492 | ret = -((int) ret_code); | |
2493 | goto end; | |
56f0bc67 | 2494 | } |
de453daa JG |
2495 | } |
2496 | ||
de453daa JG |
2497 | ret = (int) nb_events; |
2498 | end: | |
8ddd72ef | 2499 | lttng_payload_reset(&reply); |
b4e3ceb9 | 2500 | return ret; |
9f19cc17 DG |
2501 | } |
2502 | ||
fac6795d | 2503 | /* |
1c8d13c8 TD |
2504 | * Sets the tracing_group variable with name. |
2505 | * This function allocates memory pointed to by tracing_group. | |
2506 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2507 | */ |
2508 | int lttng_set_tracing_group(const char *name) | |
2509 | { | |
e32a3d0f | 2510 | int ret = 0; |
76da29b6 | 2511 | char *new_group; |
e32a3d0f | 2512 | |
cd9adb8b | 2513 | if (name == nullptr) { |
e32a3d0f JG |
2514 | ret = -LTTNG_ERR_INVALID; |
2515 | goto end; | |
9d697d3d DG |
2516 | } |
2517 | ||
e32a3d0f JG |
2518 | new_group = strdup(name); |
2519 | if (!new_group) { | |
2520 | ret = -LTTNG_ERR_FATAL; | |
2521 | goto end; | |
fac6795d DG |
2522 | } |
2523 | ||
76da29b6 JR |
2524 | free(tracing_group); |
2525 | tracing_group = new_group; | |
cd9adb8b | 2526 | new_group = nullptr; |
76da29b6 | 2527 | |
e32a3d0f JG |
2528 | end: |
2529 | return ret; | |
fac6795d DG |
2530 | } |
2531 | ||
f46376a1 | 2532 | int lttng_calibrate(struct lttng_handle *handle __attribute__((unused)), |
28ab034a | 2533 | struct lttng_calibrate *calibrate __attribute__((unused))) |
d0254c7c | 2534 | { |
b812e5ca PP |
2535 | /* |
2536 | * This command was removed in LTTng 2.9. | |
2537 | */ | |
2538 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2539 | } |
2540 | ||
5edd7e09 DG |
2541 | /* |
2542 | * Set default channel attributes. | |
441c16a7 | 2543 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 | 2544 | */ |
28ab034a | 2545 | void lttng_channel_set_default_attr(struct lttng_domain *domain, struct lttng_channel_attr *attr) |
5edd7e09 | 2546 | { |
294851b0 | 2547 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2548 | |
5edd7e09 | 2549 | /* Safety check */ |
cd9adb8b | 2550 | if (attr == nullptr || domain == nullptr) { |
5edd7e09 DG |
2551 | return; |
2552 | } | |
2553 | ||
999af9c1 | 2554 | /* Save the pointer for later use */ |
294851b0 | 2555 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2556 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2557 | ||
0a9c6494 DG |
2558 | /* Same for all domains. */ |
2559 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2560 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2561 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2562 | ||
5edd7e09 DG |
2563 | switch (domain->type) { |
2564 | case LTTNG_DOMAIN_KERNEL: | |
28ab034a | 2565 | attr->switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
d92ff3ef | 2566 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2567 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2568 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2569 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
2570 | break; | |
2571 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2572 | switch (domain->buf_type) { |
2573 | case LTTNG_BUFFER_PER_UID: | |
2574 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2575 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2576 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
28ab034a JG |
2577 | attr->switch_timer_interval = DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; |
2578 | attr->read_timer_interval = DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2579 | break; |
2580 | case LTTNG_BUFFER_PER_PID: | |
2581 | default: | |
2582 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2583 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2584 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
28ab034a JG |
2585 | attr->switch_timer_interval = DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; |
2586 | attr->read_timer_interval = DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
0a9c6494 DG |
2587 | break; |
2588 | } | |
5edd7e09 | 2589 | default: |
441c16a7 | 2590 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2591 | break; |
2592 | } | |
cf0bcb51 | 2593 | |
999af9c1 JR |
2594 | if (extended) { |
2595 | lttng_channel_set_default_extended_attr(domain, extended); | |
2596 | } | |
2597 | ||
2598 | /* Reassign the extended pointer. */ | |
cf0bcb51 | 2599 | attr->extended.ptr = extended; |
5edd7e09 DG |
2600 | } |
2601 | ||
5ba3702f | 2602 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
28ab034a | 2603 | uint64_t *discarded_events) |
5ba3702f JG |
2604 | { |
2605 | int ret = 0; | |
cf0bcb51 | 2606 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2607 | |
2608 | if (!channel || !discarded_events) { | |
2609 | ret = -LTTNG_ERR_INVALID; | |
2610 | goto end; | |
2611 | } | |
2612 | ||
4bd69c5f | 2613 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2614 | if (!chan_ext) { |
2615 | /* | |
2616 | * This can happen since the lttng_channel structure is | |
2617 | * used for other tasks where this pointer is never set. | |
2618 | */ | |
2619 | *discarded_events = 0; | |
2620 | goto end; | |
2621 | } | |
2622 | ||
2623 | *discarded_events = chan_ext->discarded_events; | |
2624 | end: | |
2625 | return ret; | |
2626 | } | |
2627 | ||
28ab034a | 2628 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, uint64_t *lost_packets) |
5ba3702f JG |
2629 | { |
2630 | int ret = 0; | |
cf0bcb51 | 2631 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2632 | |
2633 | if (!channel || !lost_packets) { | |
2634 | ret = -LTTNG_ERR_INVALID; | |
2635 | goto end; | |
2636 | } | |
2637 | ||
4bd69c5f | 2638 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2639 | if (!chan_ext) { |
2640 | /* | |
2641 | * This can happen since the lttng_channel structure is | |
2642 | * used for other tasks where this pointer is never set. | |
2643 | */ | |
2644 | *lost_packets = 0; | |
2645 | goto end; | |
2646 | } | |
2647 | ||
2648 | *lost_packets = chan_ext->lost_packets; | |
2649 | end: | |
2650 | return ret; | |
2651 | } | |
2652 | ||
cf0bcb51 | 2653 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
28ab034a | 2654 | uint64_t *monitor_timer_interval) |
cf0bcb51 JG |
2655 | { |
2656 | int ret = 0; | |
2657 | ||
2658 | if (!chan || !monitor_timer_interval) { | |
2659 | ret = -LTTNG_ERR_INVALID; | |
2660 | goto end; | |
2661 | } | |
2662 | ||
2663 | if (!chan->attr.extended.ptr) { | |
2664 | ret = -LTTNG_ERR_INVALID; | |
2665 | goto end; | |
2666 | } | |
2667 | ||
28ab034a JG |
2668 | *monitor_timer_interval = |
2669 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->monitor_timer_interval; | |
cf0bcb51 JG |
2670 | end: |
2671 | return ret; | |
2672 | } | |
2673 | ||
2674 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
28ab034a | 2675 | uint64_t monitor_timer_interval) |
cf0bcb51 JG |
2676 | { |
2677 | int ret = 0; | |
2678 | ||
2679 | if (!chan || !chan->attr.extended.ptr) { | |
2680 | ret = -LTTNG_ERR_INVALID; | |
2681 | goto end; | |
2682 | } | |
2683 | ||
28ab034a JG |
2684 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->monitor_timer_interval = |
2685 | monitor_timer_interval; | |
cf0bcb51 JG |
2686 | end: |
2687 | return ret; | |
2688 | } | |
2689 | ||
28ab034a | 2690 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, int64_t *blocking_timeout) |
491d1539 MD |
2691 | { |
2692 | int ret = 0; | |
2693 | ||
2694 | if (!chan || !blocking_timeout) { | |
2695 | ret = -LTTNG_ERR_INVALID; | |
2696 | goto end; | |
2697 | } | |
2698 | ||
2699 | if (!chan->attr.extended.ptr) { | |
2700 | ret = -LTTNG_ERR_INVALID; | |
2701 | goto end; | |
2702 | } | |
2703 | ||
28ab034a JG |
2704 | *blocking_timeout = |
2705 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->blocking_timeout; | |
491d1539 MD |
2706 | end: |
2707 | return ret; | |
2708 | } | |
2709 | ||
28ab034a | 2710 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, int64_t blocking_timeout) |
491d1539 MD |
2711 | { |
2712 | int ret = 0; | |
2713 | int64_t msec_timeout; | |
2714 | ||
2715 | if (!chan || !chan->attr.extended.ptr) { | |
2716 | ret = -LTTNG_ERR_INVALID; | |
2717 | goto end; | |
2718 | } | |
2719 | ||
2720 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2721 | ret = -LTTNG_ERR_INVALID; | |
2722 | goto end; | |
2723 | } | |
2724 | ||
2725 | /* | |
2726 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2727 | * us to accept a narrower range of values (msecs expressed as a signed | |
2728 | * 32-bit integer). | |
2729 | */ | |
2730 | msec_timeout = blocking_timeout / 1000; | |
2731 | if (msec_timeout != (int32_t) msec_timeout) { | |
2732 | ret = -LTTNG_ERR_INVALID; | |
2733 | goto end; | |
2734 | } | |
2735 | ||
28ab034a JG |
2736 | ((struct lttng_channel_extended *) chan->attr.extended.ptr)->blocking_timeout = |
2737 | blocking_timeout; | |
491d1539 MD |
2738 | end: |
2739 | return ret; | |
2740 | } | |
2741 | ||
fac6795d | 2742 | /* |
2269e89e | 2743 | * Check if session daemon is alive. |
fac6795d | 2744 | * |
2269e89e | 2745 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2746 | * On error returns a negative value. |
fac6795d | 2747 | */ |
947308c4 | 2748 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2749 | { |
2750 | int ret; | |
2751 | ||
2752 | ret = set_session_daemon_path(); | |
2753 | if (ret < 0) { | |
9ae110e2 | 2754 | /* Error. */ |
fac6795d DG |
2755 | return ret; |
2756 | } | |
2757 | ||
9d035200 | 2758 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2759 | /* |
9ae110e2 JG |
2760 | * No socket path set. Weird error which means the constructor |
2761 | * was not called. | |
2f70b271 | 2762 | */ |
a0377dfe | 2763 | abort(); |
fac6795d DG |
2764 | } |
2765 | ||
2269e89e | 2766 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2767 | if (ret < 0) { |
9ae110e2 | 2768 | /* Not alive. */ |
7d8234d9 MD |
2769 | return 0; |
2770 | } | |
7d8234d9 | 2771 | |
9ae110e2 | 2772 | /* Is alive. */ |
947308c4 | 2773 | return 1; |
fac6795d DG |
2774 | } |
2775 | ||
00e2e675 | 2776 | /* |
a4b92340 | 2777 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2778 | * |
2779 | * Return 0 on success, else a negative value. | |
2780 | */ | |
a4b92340 | 2781 | int lttng_set_consumer_url(struct lttng_handle *handle, |
28ab034a JG |
2782 | const char *control_url, |
2783 | const char *data_url) | |
00e2e675 | 2784 | { |
3dd05a85 | 2785 | int ret; |
a4b92340 | 2786 | ssize_t size; |
00e2e675 | 2787 | struct lttcomm_session_msg lsm; |
cd9adb8b | 2788 | struct lttng_uri *uris = nullptr; |
00e2e675 | 2789 | |
cd9adb8b | 2790 | if (handle == nullptr || (control_url == nullptr && data_url == nullptr)) { |
e1b624d0 JG |
2791 | ret = -LTTNG_ERR_INVALID; |
2792 | goto error; | |
00e2e675 DG |
2793 | } |
2794 | ||
a4b92340 DG |
2795 | memset(&lsm, 0, sizeof(lsm)); |
2796 | ||
37a5ef39 | 2797 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_SET_CONSUMER_URI; |
00e2e675 | 2798 | |
28ab034a | 2799 | ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2800 | if (ret) { |
2801 | ret = -LTTNG_ERR_INVALID; | |
2802 | goto error; | |
2803 | } | |
2804 | ||
60160d2a | 2805 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2806 | |
bc894455 | 2807 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2808 | if (size < 0) { |
e1b624d0 JG |
2809 | ret = -LTTNG_ERR_INVALID; |
2810 | goto error; | |
a4b92340 DG |
2811 | } |
2812 | ||
2813 | lsm.u.uri.size = size; | |
00e2e675 | 2814 | |
28ab034a | 2815 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( |
cd9adb8b | 2816 | &lsm, uris, sizeof(struct lttng_uri) * size, nullptr); |
3dd05a85 DG |
2817 | |
2818 | free(uris); | |
e1b624d0 | 2819 | error: |
3dd05a85 | 2820 | return ret; |
00e2e675 DG |
2821 | } |
2822 | ||
2823 | /* | |
9c6bda17 | 2824 | * [OBSOLETE] |
00e2e675 | 2825 | */ |
28ab034a | 2826 | extern "C" LTTNG_EXPORT int lttng_enable_consumer(struct lttng_handle *handle); |
f46376a1 | 2827 | int lttng_enable_consumer(struct lttng_handle *handle __attribute__((unused))) |
00e2e675 | 2828 | { |
785d2d0d | 2829 | return -ENOSYS; |
00e2e675 DG |
2830 | } |
2831 | ||
2832 | /* | |
9c6bda17 | 2833 | * [OBSOLETE] |
00e2e675 | 2834 | */ |
28ab034a | 2835 | extern "C" LTTNG_EXPORT int lttng_disable_consumer(struct lttng_handle *handle); |
f46376a1 | 2836 | int lttng_disable_consumer(struct lttng_handle *handle __attribute__((unused))) |
00e2e675 | 2837 | { |
785d2d0d | 2838 | return -ENOSYS; |
00e2e675 DG |
2839 | } |
2840 | ||
07424f16 | 2841 | /* |
b178f53e | 2842 | * [OBSOLETE] |
07424f16 | 2843 | */ |
28ab034a JG |
2844 | extern "C" LTTNG_EXPORT int |
2845 | _lttng_create_session_ext(const char *name, const char *url, const char *datetime); | |
f46376a1 | 2846 | int _lttng_create_session_ext(const char *name __attribute__((unused)), |
28ab034a JG |
2847 | const char *url __attribute__((unused)), |
2848 | const char *datetime __attribute__((unused))) | |
07424f16 | 2849 | { |
b178f53e | 2850 | return -ENOSYS; |
07424f16 DG |
2851 | } |
2852 | ||
806e2684 DG |
2853 | /* |
2854 | * For a given session name, this call checks if the data is ready to be read | |
2855 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2856 | * any readers. | |
2857 | */ | |
6d805429 | 2858 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2859 | { |
2860 | int ret; | |
2861 | struct lttcomm_session_msg lsm; | |
cd9adb8b | 2862 | uint8_t *pending = nullptr; |
806e2684 | 2863 | |
cd9adb8b | 2864 | if (session_name == nullptr) { |
806e2684 DG |
2865 | return -LTTNG_ERR_INVALID; |
2866 | } | |
2867 | ||
53efb85a | 2868 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 2869 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_DATA_PENDING; |
806e2684 | 2870 | |
28ab034a | 2871 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2872 | if (ret) { |
2873 | ret = -LTTNG_ERR_INVALID; | |
2874 | goto end; | |
2875 | } | |
806e2684 | 2876 | |
f6151c55 JG |
2877 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2878 | if (ret < 0) { | |
2879 | goto end; | |
2880 | } else if (ret != 1) { | |
2881 | /* Unexpected payload size */ | |
2882 | ret = -LTTNG_ERR_INVALID; | |
2883 | goto end; | |
e848d36d JG |
2884 | } else if (!pending) { |
2885 | /* Internal error. */ | |
2886 | ret = -LTTNG_ERR_UNK; | |
2887 | goto end; | |
806e2684 DG |
2888 | } |
2889 | ||
f6151c55 JG |
2890 | ret = (int) *pending; |
2891 | end: | |
2892 | free(pending); | |
806e2684 DG |
2893 | return ret; |
2894 | } | |
2895 | ||
49cddecd KS |
2896 | /* |
2897 | * Get the status of the kernel tracer | |
2898 | * | |
2899 | * Sets the value of the argument | |
2900 | */ | |
d93bbc2a | 2901 | enum lttng_error_code lttng_get_kernel_tracer_status(enum lttng_kernel_tracer_status *out_status) |
49cddecd | 2902 | { |
d93bbc2a | 2903 | if (out_status == nullptr) { |
49cddecd KS |
2904 | return LTTNG_ERR_INVALID; |
2905 | } | |
2906 | ||
2907 | struct lttcomm_session_msg lsm = {}; | |
2908 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_KERNEL_TRACER_STATUS; | |
2909 | ||
d93bbc2a JG |
2910 | uint32_t *raw_tracer_status = nullptr; |
2911 | const auto ask_ret = lttng_ctl_ask_sessiond(&lsm, (void **) &raw_tracer_status); | |
2912 | ||
2913 | const auto tracer_status = | |
303ac4ed | 2914 | lttng::make_unique_wrapper<uint32_t, lttng::memory::free>(raw_tracer_status); |
d93bbc2a | 2915 | |
49cddecd | 2916 | if (ask_ret != 4) { |
d93bbc2a | 2917 | return LTTNG_ERR_INVALID; |
49cddecd KS |
2918 | } |
2919 | ||
d93bbc2a JG |
2920 | *out_status = (enum lttng_kernel_tracer_status) * tracer_status; |
2921 | return LTTNG_OK; | |
49cddecd KS |
2922 | } |
2923 | ||
93ec662e JD |
2924 | /* |
2925 | * Regenerate the metadata for a session. | |
2926 | * Return 0 on success, a negative error code on error. | |
2927 | */ | |
eded6438 | 2928 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2929 | { |
2930 | int ret; | |
2931 | struct lttcomm_session_msg lsm; | |
2932 | ||
2933 | if (!session_name) { | |
2934 | ret = -LTTNG_ERR_INVALID; | |
2935 | goto end; | |
2936 | } | |
2937 | ||
2938 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2939 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGENERATE_METADATA; |
93ec662e | 2940 | |
28ab034a | 2941 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2942 | if (ret) { |
2943 | ret = -LTTNG_ERR_INVALID; | |
2944 | goto end; | |
2945 | } | |
93ec662e | 2946 | |
cd9adb8b | 2947 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
93ec662e JD |
2948 | if (ret < 0) { |
2949 | goto end; | |
2950 | } | |
2951 | ||
2952 | ret = 0; | |
2953 | end: | |
2954 | return ret; | |
2955 | } | |
2956 | ||
eded6438 JD |
2957 | /* |
2958 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2959 | */ | |
2960 | int lttng_metadata_regenerate(const char *session_name) | |
2961 | { | |
2962 | return lttng_regenerate_metadata(session_name); | |
2963 | } | |
2964 | ||
c2561365 JD |
2965 | /* |
2966 | * Regenerate the statedump of a session. | |
2967 | * Return 0 on success, a negative error code on error. | |
2968 | */ | |
2969 | int lttng_regenerate_statedump(const char *session_name) | |
2970 | { | |
2971 | int ret; | |
2972 | struct lttcomm_session_msg lsm; | |
2973 | ||
2974 | if (!session_name) { | |
2975 | ret = -LTTNG_ERR_INVALID; | |
2976 | goto end; | |
2977 | } | |
2978 | ||
2979 | memset(&lsm, 0, sizeof(lsm)); | |
37a5ef39 | 2980 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_REGENERATE_STATEDUMP; |
c2561365 | 2981 | |
28ab034a | 2982 | ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); |
e1b624d0 JG |
2983 | if (ret) { |
2984 | ret = -LTTNG_ERR_INVALID; | |
2985 | goto end; | |
2986 | } | |
c2561365 | 2987 | |
cd9adb8b | 2988 | ret = lttng_ctl_ask_sessiond(&lsm, nullptr); |
c2561365 JD |
2989 | if (ret < 0) { |
2990 | goto end; | |
2991 | } | |
2992 | ||
2993 | ret = 0; | |
2994 | end: | |
2995 | return ret; | |
2996 | } | |
2997 | ||
28ab034a JG |
2998 | static int |
2999 | _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, bool generate_name) | |
a58c490f JG |
3000 | { |
3001 | int ret; | |
99608320 | 3002 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 3003 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_REGISTER_TRIGGER, |
1c9a0b0e MJ |
3004 | .session = {}, |
3005 | .domain = {}, | |
3006 | .u = {}, | |
3007 | .fd_count = 0, | |
99608320 | 3008 | }; |
4bd69c5f | 3009 | lsm.u.trigger.is_trigger_anonymous = !name && !generate_name; |
99608320 JR |
3010 | struct lttcomm_session_msg *message_lsm; |
3011 | struct lttng_payload message; | |
3012 | struct lttng_payload reply; | |
cd9adb8b | 3013 | struct lttng_trigger *reply_trigger = nullptr; |
9124c630 | 3014 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
3015 | const struct lttng_credentials user_creds = { |
3016 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3017 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3018 | }; | |
cd9adb8b | 3019 | const char *unused_trigger_name = nullptr; |
a5c2d2a7 | 3020 | enum lttng_trigger_status trigger_status; |
99608320 JR |
3021 | |
3022 | lttng_payload_init(&message); | |
3023 | lttng_payload_init(&reply); | |
a58c490f JG |
3024 | |
3025 | if (!trigger) { | |
3026 | ret = -LTTNG_ERR_INVALID; | |
3027 | goto end; | |
3028 | } | |
3029 | ||
a5c2d2a7 JG |
3030 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
3031 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
3032 | /* Re-using already registered trigger. */ | |
3033 | ret = -LTTNG_ERR_INVALID; | |
3034 | goto end; | |
3035 | } | |
3036 | ||
3037 | if (name) { | |
3038 | trigger_status = lttng_trigger_set_name(trigger, name); | |
3039 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3040 | ret = -LTTNG_ERR_NOMEM; | |
3041 | goto end; | |
3042 | } | |
3043 | } | |
3044 | ||
64eafdf6 JR |
3045 | if (!trigger->creds.uid.is_set) { |
3046 | /* Use the client's credentials as the trigger credentials. */ | |
3047 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3048 | } else { | |
3049 | /* | |
3050 | * Validate that either the current trigger credentials and the | |
3051 | * client credentials are identical or that the current user is | |
3052 | * root. The root user can register, unregister triggers for | |
3053 | * himself and other users. | |
3054 | * | |
3055 | * This check is also present on the sessiond side, using the | |
3056 | * credentials passed on the socket. These check are all | |
3057 | * "safety" checks. | |
3058 | */ | |
3059 | const struct lttng_credentials *trigger_creds = | |
28ab034a | 3060 | lttng_trigger_get_credentials(trigger); |
64eafdf6 JR |
3061 | |
3062 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3063 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3064 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 3065 | goto end_unset_name; |
64eafdf6 JR |
3066 | } |
3067 | } | |
3068 | } | |
3069 | ||
a58c490f | 3070 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3071 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 3072 | goto end_unset_name; |
a58c490f JG |
3073 | } |
3074 | ||
28ab034a | 3075 | domain_type = lttng_trigger_get_underlying_domain_type_restriction(trigger); |
9124c630 JR |
3076 | |
3077 | lsm.domain.type = domain_type; | |
3078 | ||
97285430 JG |
3079 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3080 | if (ret) { | |
3081 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 3082 | goto end_unset_name; |
97285430 | 3083 | } |
99608320 | 3084 | |
99608320 | 3085 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3086 | if (ret < 0) { |
a58c490f | 3087 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3088 | goto end_unset_name; |
a58c490f JG |
3089 | } |
3090 | ||
b22f4f54 JG |
3091 | /* |
3092 | * This is needed to populate the trigger object size for the command | |
3093 | * header. | |
3094 | */ | |
3095 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3096 | ||
99608320 JR |
3097 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3098 | ||
3099 | { | |
3100 | struct lttng_payload_view message_view = | |
28ab034a | 3101 | lttng_payload_view_from_payload(&message, 0, -1); |
99608320 | 3102 | |
28ab034a | 3103 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
99608320 JR |
3104 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); |
3105 | if (ret < 0) { | |
a5c2d2a7 | 3106 | goto end_unset_name; |
99608320 JR |
3107 | } |
3108 | } | |
3109 | ||
242388e4 JR |
3110 | { |
3111 | struct lttng_payload_view reply_view = | |
28ab034a | 3112 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
242388e4 | 3113 | |
28ab034a | 3114 | ret = lttng_trigger_create_from_payload(&reply_view, &reply_trigger); |
242388e4 | 3115 | if (ret < 0) { |
a5c2d2a7 JG |
3116 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3117 | goto end_unset_name; | |
242388e4 JR |
3118 | } |
3119 | } | |
3120 | ||
a5c2d2a7 JG |
3121 | if (name || generate_name) { |
3122 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3123 | if (ret < 0) { | |
3124 | ret = -LTTNG_ERR_NOMEM; | |
3125 | goto end; | |
3126 | } | |
242388e4 JR |
3127 | } |
3128 | ||
99608320 | 3129 | ret = 0; |
a5c2d2a7 JG |
3130 | goto end; |
3131 | ||
3132 | end_unset_name: | |
cd9adb8b | 3133 | trigger_status = lttng_trigger_set_name(trigger, nullptr); |
a5c2d2a7 JG |
3134 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
3135 | ret = -LTTNG_ERR_UNK; | |
3136 | } | |
a58c490f | 3137 | end: |
99608320 JR |
3138 | lttng_payload_reset(&message); |
3139 | lttng_payload_reset(&reply); | |
242388e4 | 3140 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3141 | return ret; |
3142 | } | |
3143 | ||
a5c2d2a7 JG |
3144 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3145 | { | |
3146 | /* Register an anonymous trigger. */ | |
cd9adb8b | 3147 | return _lttng_register_trigger(trigger, nullptr, false); |
a5c2d2a7 JG |
3148 | } |
3149 | ||
28ab034a JG |
3150 | enum lttng_error_code lttng_register_trigger_with_name(struct lttng_trigger *trigger, |
3151 | const char *name) | |
a5c2d2a7 JG |
3152 | { |
3153 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3154 | ||
28ab034a | 3155 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) - ret; |
a5c2d2a7 JG |
3156 | } |
3157 | ||
28ab034a | 3158 | enum lttng_error_code lttng_register_trigger_with_automatic_name(struct lttng_trigger *trigger) |
a5c2d2a7 | 3159 | { |
28ab034a | 3160 | const int ret = _lttng_register_trigger(trigger, nullptr, true); |
a5c2d2a7 | 3161 | |
28ab034a | 3162 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) - ret; |
a5c2d2a7 JG |
3163 | } |
3164 | ||
28ab034a JG |
3165 | enum lttng_error_code lttng_error_query_execute(const struct lttng_error_query *query, |
3166 | const struct lttng_endpoint *endpoint, | |
3167 | struct lttng_error_query_results **results) | |
b99a0cb3 JG |
3168 | { |
3169 | int ret; | |
3170 | enum lttng_error_code ret_code; | |
3171 | struct lttcomm_session_msg lsm = { | |
37a5ef39 | 3172 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_EXECUTE_ERROR_QUERY, |
1c9a0b0e MJ |
3173 | .session = {}, |
3174 | .domain = {}, | |
3175 | .u = {}, | |
3176 | .fd_count = 0, | |
b99a0cb3 JG |
3177 | }; |
3178 | struct lttng_payload message; | |
3179 | struct lttng_payload reply; | |
3180 | struct lttcomm_session_msg *message_lsm; | |
3181 | ||
3182 | lttng_payload_init(&message); | |
3183 | lttng_payload_init(&reply); | |
3184 | ||
3185 | if (!query || !results) { | |
3186 | ret_code = LTTNG_ERR_INVALID; | |
3187 | goto end; | |
3188 | } | |
3189 | ||
3190 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3191 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3192 | goto end; | |
3193 | } | |
3194 | ||
3195 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3196 | if (ret) { | |
3197 | ret_code = LTTNG_ERR_NOMEM; | |
3198 | goto end; | |
3199 | } | |
3200 | ||
3201 | ret = lttng_error_query_serialize(query, &message); | |
3202 | if (ret) { | |
3203 | ret_code = LTTNG_ERR_UNK; | |
3204 | goto end; | |
3205 | } | |
3206 | ||
3207 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
28ab034a | 3208 | message_lsm->u.error_query.length = (uint32_t) message.buffer.size - sizeof(lsm); |
b99a0cb3 JG |
3209 | |
3210 | { | |
3211 | struct lttng_payload_view message_view = | |
28ab034a | 3212 | lttng_payload_view_from_payload(&message, 0, -1); |
b99a0cb3 | 3213 | |
28ab034a | 3214 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
b99a0cb3 JG |
3215 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); |
3216 | if (ret < 0) { | |
28ab034a | 3217 | ret_code = (lttng_error_code) -ret; |
b99a0cb3 JG |
3218 | goto end; |
3219 | } | |
3220 | } | |
3221 | ||
3222 | { | |
3223 | ssize_t reply_create_ret; | |
3224 | struct lttng_payload_view reply_view = | |
28ab034a | 3225 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
b99a0cb3 | 3226 | |
28ab034a JG |
3227 | reply_create_ret = |
3228 | lttng_error_query_results_create_from_payload(&reply_view, results); | |
b99a0cb3 JG |
3229 | if (reply_create_ret < 0) { |
3230 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3231 | goto end; | |
3232 | } | |
3233 | } | |
3234 | ||
3235 | ret_code = LTTNG_OK; | |
3236 | end: | |
3237 | lttng_payload_reset(&message); | |
3238 | lttng_payload_reset(&reply); | |
3239 | return ret_code; | |
3240 | } | |
3241 | ||
b61776fb | 3242 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3243 | { |
3244 | int ret; | |
3245 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3246 | struct lttcomm_session_msg *message_lsm; |
3247 | struct lttng_payload message; | |
3248 | struct lttng_payload reply; | |
cd9adb8b | 3249 | struct lttng_trigger *copy = nullptr; |
64eafdf6 JR |
3250 | const struct lttng_credentials user_creds = { |
3251 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3252 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3253 | }; | |
99608320 JR |
3254 | |
3255 | lttng_payload_init(&message); | |
3256 | lttng_payload_init(&reply); | |
a58c490f JG |
3257 | |
3258 | if (!trigger) { | |
3259 | ret = -LTTNG_ERR_INVALID; | |
3260 | goto end; | |
3261 | } | |
3262 | ||
b61776fb SM |
3263 | copy = lttng_trigger_copy(trigger); |
3264 | if (!copy) { | |
3265 | ret = -LTTNG_ERR_UNK; | |
3266 | goto end; | |
3267 | } | |
3268 | ||
3269 | if (!copy->creds.uid.is_set) { | |
3270 | /* Use the client credentials as the trigger credentials */ | |
3271 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3272 | } else { |
3273 | /* | |
3274 | * Validate that either the current trigger credentials and the | |
3275 | * client credentials are identical or that the current user is | |
3276 | * root. The root user can register, unregister triggers for | |
3277 | * himself and other users. | |
3278 | * | |
3279 | * This check is also present on the sessiond side, using the | |
3280 | * credentials passed on the socket. These check are all | |
3281 | * "safety" checks. | |
3282 | */ | |
28ab034a | 3283 | const struct lttng_credentials *trigger_creds = lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3284 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3285 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3286 | ret = -LTTNG_ERR_EPERM; | |
3287 | goto end; | |
3288 | } | |
3289 | } | |
3290 | } | |
3291 | ||
b61776fb | 3292 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3293 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3294 | goto end; |
3295 | } | |
3296 | ||
99608320 | 3297 | memset(&lsm, 0, sizeof(lsm)); |
37a5ef39 | 3298 | lsm.cmd_type = LTTCOMM_SESSIOND_COMMAND_UNREGISTER_TRIGGER; |
99608320 | 3299 | |
97285430 JG |
3300 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3301 | if (ret) { | |
3302 | ret = -LTTNG_ERR_NOMEM; | |
3303 | goto end; | |
3304 | } | |
99608320 | 3305 | |
b61776fb | 3306 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3307 | if (ret < 0) { |
a58c490f JG |
3308 | ret = -LTTNG_ERR_UNK; |
3309 | goto end; | |
3310 | } | |
3311 | ||
b0a79813 FD |
3312 | /* |
3313 | * This is needed to populate the trigger object size for the command | |
3314 | * header and number of fds sent. | |
28ab034a | 3315 | */ |
b0a79813 FD |
3316 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; |
3317 | ||
99608320 JR |
3318 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3319 | ||
3320 | { | |
3321 | struct lttng_payload_view message_view = | |
28ab034a | 3322 | lttng_payload_view_from_payload(&message, 0, -1); |
99608320 JR |
3323 | |
3324 | /* | |
3325 | * Update the message header with the number of fd that will be | |
3326 | * sent. | |
3327 | */ | |
28ab034a | 3328 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count(&message_view); |
99608320 JR |
3329 | |
3330 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3331 | if (ret < 0) { | |
3332 | goto end; | |
3333 | } | |
3334 | } | |
3335 | ||
3336 | ret = 0; | |
a58c490f | 3337 | end: |
b61776fb | 3338 | lttng_trigger_destroy(copy); |
99608320 JR |
3339 | lttng_payload_reset(&message); |
3340 | lttng_payload_reset(&reply); | |
a58c490f JG |
3341 | return ret; |
3342 | } | |
3343 | ||
fbc9f37d JR |
3344 | /* |
3345 | * Ask the session daemon for all registered triggers for the current user. | |
3346 | * | |
3347 | * Allocates and return an lttng_triggers set. | |
3348 | * On error, returns a suitable lttng_error_code. | |
3349 | */ | |
3350 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3351 | { | |
3352 | int ret; | |
3353 | enum lttng_error_code ret_code = LTTNG_OK; | |
1c9a0b0e | 3354 | struct lttcomm_session_msg lsm = { |
37a5ef39 | 3355 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_LIST_TRIGGERS, |
1c9a0b0e MJ |
3356 | .session = {}, |
3357 | .domain = {}, | |
3358 | .u = {}, | |
3359 | .fd_count = 0, | |
3360 | }; | |
cd9adb8b | 3361 | struct lttng_triggers *local_triggers = nullptr; |
fbc9f37d JR |
3362 | struct lttng_payload reply; |
3363 | struct lttng_payload_view lsm_view = | |
28ab034a | 3364 | lttng_payload_view_init_from_buffer((const char *) &lsm, 0, sizeof(lsm)); |
fbc9f37d JR |
3365 | |
3366 | lttng_payload_init(&reply); | |
3367 | ||
3368 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3369 | if (ret < 0) { | |
28ab034a | 3370 | ret_code = (enum lttng_error_code) - ret; |
fbc9f37d JR |
3371 | goto end; |
3372 | } | |
3373 | ||
3374 | { | |
3375 | struct lttng_payload_view reply_view = | |
28ab034a | 3376 | lttng_payload_view_from_payload(&reply, 0, reply.buffer.size); |
fbc9f37d | 3377 | |
28ab034a | 3378 | ret = lttng_triggers_create_from_payload(&reply_view, &local_triggers); |
fbc9f37d JR |
3379 | if (ret < 0) { |
3380 | ret_code = LTTNG_ERR_FATAL; | |
3381 | goto end; | |
3382 | } | |
3383 | } | |
3384 | ||
3385 | *triggers = local_triggers; | |
cd9adb8b | 3386 | local_triggers = nullptr; |
fbc9f37d JR |
3387 | end: |
3388 | lttng_payload_reset(&reply); | |
3389 | lttng_triggers_destroy(local_triggers); | |
3390 | return ret_code; | |
3391 | } | |
3392 | ||
fac6795d | 3393 | /* |
9ae110e2 | 3394 | * lib constructor. |
fac6795d | 3395 | */ |
cd9adb8b | 3396 | static void __attribute__((constructor)) init() |
fac6795d DG |
3397 | { |
3398 | /* Set default session group */ | |
bbccc3d2 | 3399 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3400 | } |
49cca668 DG |
3401 | |
3402 | /* | |
9ae110e2 | 3403 | * lib destructor. |
49cca668 | 3404 | */ |
cd9adb8b | 3405 | static void __attribute__((destructor)) lttng_ctl_exit() |
49cca668 DG |
3406 | { |
3407 | free(tracing_group); | |
3408 | } |