Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
21cf9b6b | 6 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa | 7 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
ab5be9fa | 9 | * SPDX-License-Identifier: LGPL-2.1-only |
82a3637f | 10 | * |
fac6795d DG |
11 | */ |
12 | ||
6c1c0768 | 13 | #define _LGPL_SOURCE |
fac6795d DG |
14 | #include <grp.h> |
15 | #include <stdio.h> | |
16 | #include <stdlib.h> | |
13dd7782 | 17 | #include <stdint.h> |
fac6795d DG |
18 | #include <string.h> |
19 | #include <unistd.h> | |
20 | ||
0ae3cfc6 | 21 | #include <common/bytecode/bytecode.h> |
1cbd136b | 22 | #include <common/align.h> |
990570ed | 23 | #include <common/common.h> |
edf4b93e | 24 | #include <common/compat/errno.h> |
15e37663 | 25 | #include <common/compat/string.h> |
990570ed | 26 | #include <common/defaults.h> |
fe489250 | 27 | #include <common/dynamic-array.h> |
b99a0cb3 | 28 | #include <common/dynamic-buffer.h> |
9e620ea7 | 29 | #include <common/payload-view.h> |
b99a0cb3 | 30 | #include <common/payload.h> |
db758600 | 31 | #include <common/sessiond-comm/sessiond-comm.h> |
159b042f | 32 | #include <common/tracker.h> |
fe489250 | 33 | #include <common/unix.h> |
a4b92340 | 34 | #include <common/uri.h> |
feb0f3e5 | 35 | #include <common/utils.h> |
a58c490f | 36 | #include <lttng/channel-internal.h> |
159b042f JG |
37 | #include <lttng/destruction-handle.h> |
38 | #include <lttng/endpoint.h> | |
b99a0cb3 | 39 | #include <lttng/error-query-internal.h> |
de453daa | 40 | #include <lttng/event-internal.h> |
159b042f | 41 | #include <lttng/health-internal.h> |
b99a0cb3 | 42 | #include <lttng/lttng-error.h> |
159b042f | 43 | #include <lttng/lttng.h> |
b178f53e | 44 | #include <lttng/session-descriptor-internal.h> |
159b042f JG |
45 | #include <lttng/session-internal.h> |
46 | #include <lttng/trigger/trigger-internal.h> | |
47 | #include <lttng/userspace-probe-internal.h> | |
fac6795d | 48 | |
b99a0cb3 | 49 | #include "lttng-ctl-helper.h" |
e4d2f27a | 50 | #include <common/filter/filter-ast.h> |
348ddc5c | 51 | #include <common/filter/filter-parser.hpp> |
e4d2f27a | 52 | #include <common/filter/memstream.h> |
53a80697 | 53 | |
60160d2a JG |
54 | #define COPY_DOMAIN_PACKED(dst, src) \ |
55 | do { \ | |
56 | struct lttng_domain _tmp_domain; \ | |
57 | \ | |
58 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
59 | dst = _tmp_domain; \ | |
60 | } while (0) | |
53a80697 | 61 | |
fac6795d | 62 | /* Socket to session daemon for communication */ |
3e3665b8 | 63 | static int sessiond_socket = -1; |
fac6795d DG |
64 | static char sessiond_sock_path[PATH_MAX]; |
65 | ||
fac6795d DG |
66 | /* Variables */ |
67 | static char *tracing_group; | |
68 | static int connected; | |
69 | ||
97e19046 DG |
70 | /* Global */ |
71 | ||
72 | /* | |
73 | * Those two variables are used by error.h to silent or control the verbosity of | |
74 | * error message. They are global to the library so application linking with it | |
75 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 | 76 | */ |
4bd69c5f SM |
77 | LTTNG_EXPORT int lttng_opt_quiet; |
78 | LTTNG_EXPORT int lttng_opt_verbose; | |
79 | LTTNG_EXPORT int lttng_opt_mi; | |
97e19046 | 80 | |
fac6795d | 81 | /* |
cd80958d | 82 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 83 | * |
cd80958d DG |
84 | * If domain is unknown, default domain will be the kernel. |
85 | */ | |
cac3069d DG |
86 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, |
87 | struct lttng_domain *src) | |
cd80958d DG |
88 | { |
89 | if (src && dst) { | |
90 | switch (src->type) { | |
00e2e675 DG |
91 | case LTTNG_DOMAIN_KERNEL: |
92 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 93 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 94 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 95 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
96 | memcpy(dst, src, sizeof(struct lttng_domain)); |
97 | break; | |
98 | default: | |
99 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 100 | break; |
cd80958d DG |
101 | } |
102 | } | |
103 | } | |
104 | ||
105 | /* | |
106 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 107 | * |
1c8d13c8 TD |
108 | * On success, returns the number of bytes sent (>=0) |
109 | * On error, returns -1 | |
fac6795d | 110 | */ |
cd80958d | 111 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
112 | { |
113 | int ret; | |
114 | ||
115 | if (!connected) { | |
2f70b271 | 116 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 117 | goto end; |
fac6795d DG |
118 | } |
119 | ||
4bd69c5f | 120 | DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str((lttcomm_sessiond_command) lsm->cmd_type), |
19f912db | 121 | lsm->cmd_type); |
a4b92340 | 122 | |
be040666 | 123 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 124 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
125 | if (ret < 0) { |
126 | ret = -LTTNG_ERR_FATAL; | |
127 | } | |
e065084a DG |
128 | |
129 | end: | |
130 | return ret; | |
131 | } | |
132 | ||
53a80697 MD |
133 | /* |
134 | * Send var len data to the session daemon. | |
135 | * | |
136 | * On success, returns the number of bytes sent (>=0) | |
137 | * On error, returns -1 | |
138 | */ | |
c2d69327 | 139 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
140 | { |
141 | int ret; | |
142 | ||
143 | if (!connected) { | |
2f70b271 | 144 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
145 | goto end; |
146 | } | |
a4b92340 | 147 | |
53a80697 MD |
148 | if (!data || !len) { |
149 | ret = 0; | |
150 | goto end; | |
151 | } | |
152 | ||
153 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
154 | if (ret < 0) { |
155 | ret = -LTTNG_ERR_FATAL; | |
156 | } | |
53a80697 MD |
157 | |
158 | end: | |
159 | return ret; | |
160 | } | |
161 | ||
a04d53fc FD |
162 | /* |
163 | * Send file descriptors to the session daemon. | |
164 | * | |
165 | * On success, returns the number of bytes sent (>=0) | |
166 | * On error, returns -1 | |
167 | */ | |
168 | static int send_session_fds(const int *fds, size_t nb_fd) | |
169 | { | |
170 | int ret; | |
171 | ||
172 | if (!connected) { | |
173 | ret = -LTTNG_ERR_NO_SESSIOND; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | if (!fds || !nb_fd) { | |
178 | ret = 0; | |
179 | goto end; | |
180 | } | |
181 | ||
182 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
183 | if (ret < 0) { | |
184 | ret = -LTTNG_ERR_FATAL; | |
185 | } | |
186 | ||
187 | end: | |
188 | return ret; | |
189 | } | |
190 | ||
e065084a | 191 | /* |
cd80958d | 192 | * Receive data from the sessiond socket. |
e065084a | 193 | * |
1c8d13c8 | 194 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 195 | * On error, returns a negative lttng_error_code. |
e065084a | 196 | */ |
ca95a216 | 197 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
198 | { |
199 | int ret; | |
200 | ||
a0377dfe | 201 | LTTNG_ASSERT(len > 0); |
bacc41cc | 202 | |
e065084a | 203 | if (!connected) { |
2f70b271 | 204 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 205 | goto end; |
fac6795d DG |
206 | } |
207 | ||
ca95a216 | 208 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
209 | if (ret < 0) { |
210 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
211 | } else if (ret == 0) { |
212 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 213 | } |
fac6795d | 214 | |
e065084a | 215 | end: |
fac6795d DG |
216 | return ret; |
217 | } | |
218 | ||
e368fb43 JG |
219 | /* |
220 | * Receive a payload from the session daemon by appending to an existing | |
221 | * payload. | |
222 | * On success, returns the number of bytes received (>=0) | |
223 | * On error, returns a negative lttng_error_code. | |
224 | */ | |
225 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
226 | { | |
227 | int ret; | |
228 | const size_t original_payload_size = payload->buffer.size; | |
229 | ||
230 | ret = lttng_dynamic_buffer_set_size( | |
231 | &payload->buffer, payload->buffer.size + len); | |
232 | if (ret) { | |
233 | ret = -LTTNG_ERR_NOMEM; | |
234 | goto end; | |
235 | } | |
236 | ||
237 | ret = recv_data_sessiond( | |
238 | payload->buffer.data + original_payload_size, len); | |
239 | end: | |
240 | return ret; | |
241 | } | |
242 | ||
fac6795d | 243 | /* |
9ae110e2 | 244 | * Check if we are in the specified group. |
65beb5ff | 245 | * |
9ae110e2 | 246 | * If yes return 1, else return -1. |
947308c4 | 247 | */ |
6c71277b | 248 | int lttng_check_tracing_group(void) |
947308c4 | 249 | { |
28ab59d0 | 250 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
251 | int grp_list_size, grp_id, i; |
252 | int ret = -1; | |
6c71277b | 253 | const char *grp_name = tracing_group; |
947308c4 DG |
254 | |
255 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 256 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 257 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
258 | goto end; |
259 | } | |
260 | ||
261 | /* Get number of supplementary group IDs */ | |
262 | grp_list_size = getgroups(0, NULL); | |
263 | if (grp_list_size < 0) { | |
6f04ed72 | 264 | PERROR("getgroups"); |
947308c4 DG |
265 | goto end; |
266 | } | |
267 | ||
268 | /* Alloc group list of the right size */ | |
4bd69c5f | 269 | grp_list = (gid_t *) zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 270 | if (!grp_list) { |
6f04ed72 | 271 | PERROR("malloc"); |
00795392 MD |
272 | goto end; |
273 | } | |
947308c4 | 274 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 275 | if (grp_id < 0) { |
6f04ed72 | 276 | PERROR("getgroups"); |
947308c4 DG |
277 | goto free_list; |
278 | } | |
279 | ||
280 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 281 | if (grp_list[i] == tracing_gid) { |
2269e89e | 282 | ret = 1; |
947308c4 DG |
283 | break; |
284 | } | |
285 | } | |
286 | ||
287 | free_list: | |
288 | free(grp_list); | |
289 | ||
290 | end: | |
291 | return ret; | |
292 | } | |
293 | ||
13dd7782 JR |
294 | static enum lttng_error_code check_enough_available_memory( |
295 | 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 | ||
13dd7782 JR |
319 | num_bytes_requested_total = |
320 | num_bytes_requested_per_cpu * (uint64_t) num_cpu; | |
09b72f7a FD |
321 | |
322 | /* | |
323 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
324 | * reliable estimate we can get but it is only exposed by the kernel | |
325 | * since 3.14. (See Linux kernel commit: | |
326 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
327 | */ | |
328 | ret = utils_get_memory_available(&best_mem_info); | |
329 | if (ret >= 0) { | |
330 | goto success; | |
331 | } | |
332 | ||
333 | /* | |
334 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
335 | * is a sanity check for obvious user error. | |
336 | */ | |
337 | ret = utils_get_memory_total(&best_mem_info); | |
338 | if (ret >= 0) { | |
339 | goto success; | |
340 | } | |
341 | ||
13dd7782 JR |
342 | /* No valid source of information. */ |
343 | ret_code = LTTNG_ERR_NOMEM; | |
344 | goto end; | |
345 | ||
09b72f7a | 346 | success: |
13dd7782 JR |
347 | if (best_mem_info >= num_bytes_requested_total) { |
348 | ret_code = LTTNG_OK; | |
349 | } else { | |
350 | ret_code = LTTNG_ERR_NOMEM; | |
351 | } | |
352 | end: | |
353 | return ret_code; | |
09b72f7a FD |
354 | } |
355 | ||
947308c4 | 356 | /* |
2269e89e DG |
357 | * Try connect to session daemon with sock_path. |
358 | * | |
359 | * Return 0 on success, else -1 | |
360 | */ | |
361 | static int try_connect_sessiond(const char *sock_path) | |
362 | { | |
363 | int ret; | |
364 | ||
365 | /* If socket exist, we check if the daemon listens for connect. */ | |
366 | ret = access(sock_path, F_OK); | |
367 | if (ret < 0) { | |
368 | /* Not alive */ | |
2f70b271 | 369 | goto error; |
2269e89e DG |
370 | } |
371 | ||
372 | ret = lttcomm_connect_unix_sock(sock_path); | |
373 | if (ret < 0) { | |
9ae110e2 | 374 | /* Not alive. */ |
2f70b271 | 375 | goto error; |
2269e89e DG |
376 | } |
377 | ||
378 | ret = lttcomm_close_unix_sock(ret); | |
379 | if (ret < 0) { | |
6f04ed72 | 380 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
381 | } |
382 | ||
383 | return 0; | |
2f70b271 DG |
384 | |
385 | error: | |
386 | return -1; | |
2269e89e DG |
387 | } |
388 | ||
389 | /* | |
2f70b271 DG |
390 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
391 | * variable. | |
392 | * | |
393 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
394 | * is somehow too long or ENOMEM). | |
947308c4 DG |
395 | */ |
396 | static int set_session_daemon_path(void) | |
397 | { | |
9ae110e2 | 398 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
399 | uid_t uid; |
400 | ||
401 | uid = getuid(); | |
947308c4 | 402 | |
2269e89e DG |
403 | if (uid != 0) { |
404 | /* Are we in the tracing group ? */ | |
6c71277b | 405 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
406 | } |
407 | ||
c295ec41 | 408 | if ((uid == 0) || in_tgroup == 1) { |
e1b624d0 JG |
409 | const int ret = lttng_strncpy(sessiond_sock_path, |
410 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
411 | sizeof(sessiond_sock_path)); | |
412 | ||
413 | if (ret) { | |
414 | goto error; | |
415 | } | |
08a9c49f | 416 | } |
2269e89e | 417 | |
08a9c49f | 418 | if (uid != 0) { |
c617c0c6 MD |
419 | int ret; |
420 | ||
08a9c49f | 421 | if (in_tgroup) { |
9ae110e2 | 422 | /* Tracing group. */ |
08a9c49f TD |
423 | ret = try_connect_sessiond(sessiond_sock_path); |
424 | if (ret >= 0) { | |
425 | goto end; | |
2269e89e | 426 | } |
08a9c49f | 427 | /* Global session daemon not available... */ |
2269e89e | 428 | } |
08a9c49f TD |
429 | /* ...or not in tracing group (and not root), default */ |
430 | ||
431 | /* | |
9ae110e2 JG |
432 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
433 | * is too small; | |
434 | * With GNU C >= 2.1, snprintf returns the required size | |
435 | * (excluding closing null) | |
08a9c49f TD |
436 | */ |
437 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 438 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 439 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 440 | goto error; |
947308c4 | 441 | } |
947308c4 | 442 | } |
08a9c49f | 443 | end: |
947308c4 | 444 | return 0; |
2f70b271 DG |
445 | |
446 | error: | |
447 | return -1; | |
947308c4 DG |
448 | } |
449 | ||
65beb5ff | 450 | /* |
9ae110e2 | 451 | * Connect to the LTTng session daemon. |
65beb5ff | 452 | * |
3e3665b8 | 453 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 454 | */ |
ca806b0b | 455 | int connect_sessiond(void) |
65beb5ff DG |
456 | { |
457 | int ret; | |
458 | ||
459 | ret = set_session_daemon_path(); | |
460 | if (ret < 0) { | |
2f70b271 | 461 | goto error; |
65beb5ff DG |
462 | } |
463 | ||
9ae110e2 | 464 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
465 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
466 | if (ret < 0) { | |
2f70b271 | 467 | goto error; |
65beb5ff DG |
468 | } |
469 | ||
3e3665b8 | 470 | return ret; |
2f70b271 DG |
471 | |
472 | error: | |
473 | return -1; | |
65beb5ff DG |
474 | } |
475 | ||
3e3665b8 JG |
476 | static void reset_global_sessiond_connection_state(void) |
477 | { | |
478 | sessiond_socket = -1; | |
479 | connected = 0; | |
480 | } | |
481 | ||
65beb5ff | 482 | /* |
1c8d13c8 | 483 | * Clean disconnect from the session daemon. |
9ae110e2 | 484 | * |
1c8d13c8 | 485 | * On success, return 0. On error, return -1. |
65beb5ff DG |
486 | */ |
487 | static int disconnect_sessiond(void) | |
488 | { | |
489 | int ret = 0; | |
490 | ||
491 | if (connected) { | |
492 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 493 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
494 | } |
495 | ||
496 | return ret; | |
497 | } | |
498 | ||
795a978d PP |
499 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
500 | size_t *user_len) | |
501 | { | |
502 | int ret = 0; | |
503 | void *buf = NULL; | |
504 | ||
505 | if (len) { | |
506 | if (!user_len) { | |
507 | ret = -LTTNG_ERR_INVALID; | |
508 | goto end; | |
509 | } | |
510 | ||
511 | buf = zmalloc(len); | |
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; | |
529 | buf = NULL; | |
530 | *user_len = len; | |
531 | } else { | |
532 | /* No command header. */ | |
533 | if (user_len) { | |
534 | *user_len = 0; | |
535 | } | |
536 | ||
537 | if (user_buf) { | |
538 | *user_buf = NULL; | |
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 FD |
554 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
555 | const int *fds, size_t nb_fd, const void *vardata, | |
556 | size_t vardata_len, void **user_payload_buf, | |
557 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
558 | { |
559 | int ret; | |
795a978d | 560 | size_t payload_len; |
cd80958d | 561 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
562 | |
563 | ret = connect_sessiond(); | |
564 | if (ret < 0) { | |
2f70b271 | 565 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 566 | goto end; |
3e3665b8 JG |
567 | } else { |
568 | sessiond_socket = ret; | |
569 | connected = 1; | |
65beb5ff DG |
570 | } |
571 | ||
cd80958d | 572 | ret = send_session_msg(lsm); |
65beb5ff | 573 | if (ret < 0) { |
2f70b271 | 574 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
575 | goto end; |
576 | } | |
53a80697 | 577 | /* Send var len data */ |
795a978d | 578 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 579 | if (ret < 0) { |
2f70b271 | 580 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
581 | goto end; |
582 | } | |
65beb5ff | 583 | |
a04d53fc FD |
584 | /* Send fds */ |
585 | ret = send_session_fds(fds, nb_fd); | |
586 | if (ret < 0) { | |
587 | /* Ret value is a valid lttng error code. */ | |
588 | goto end; | |
589 | } | |
590 | ||
65beb5ff DG |
591 | /* Get header from data transmission */ |
592 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
593 | if (ret < 0) { | |
2f70b271 | 594 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
595 | goto end; |
596 | } | |
597 | ||
598 | /* Check error code if OK */ | |
f73fabfd | 599 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
600 | ret = -llm.ret_code; |
601 | goto end; | |
602 | } | |
603 | ||
795a978d PP |
604 | /* Get command header from data transmission */ |
605 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
606 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 607 | if (ret < 0) { |
65beb5ff DG |
608 | goto end; |
609 | } | |
610 | ||
795a978d PP |
611 | /* Get payload from data transmission */ |
612 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
613 | &payload_len); | |
614 | if (ret < 0) { | |
83009e5e DG |
615 | goto end; |
616 | } | |
617 | ||
795a978d | 618 | ret = llm.data_size; |
65beb5ff DG |
619 | |
620 | end: | |
621 | disconnect_sessiond(); | |
622 | return ret; | |
623 | } | |
624 | ||
e368fb43 JG |
625 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, |
626 | struct lttng_payload *reply) | |
627 | { | |
628 | int ret; | |
629 | struct lttcomm_lttng_msg llm; | |
fe489250 | 630 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 | 631 | |
a0377dfe FD |
632 | LTTNG_ASSERT(reply->buffer.size == 0); |
633 | LTTNG_ASSERT(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); | |
e368fb43 JG |
634 | |
635 | ret = connect_sessiond(); | |
636 | if (ret < 0) { | |
637 | ret = -LTTNG_ERR_NO_SESSIOND; | |
638 | goto end; | |
639 | } else { | |
640 | sessiond_socket = ret; | |
641 | connected = 1; | |
642 | } | |
643 | ||
644 | /* Send command to session daemon */ | |
645 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data, | |
646 | message->buffer.size); | |
647 | if (ret < 0) { | |
648 | ret = -LTTNG_ERR_FATAL; | |
649 | goto end; | |
650 | } | |
651 | ||
fe489250 JG |
652 | if (fd_count > 0) { |
653 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, | |
654 | message); | |
655 | if (ret < 0) { | |
656 | ret = -LTTNG_ERR_FATAL; | |
657 | goto end; | |
658 | } | |
e368fb43 JG |
659 | } |
660 | ||
661 | /* Get header from data transmission */ | |
662 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
663 | if (ret < 0) { | |
664 | /* Ret value is a valid lttng error code. */ | |
665 | goto end; | |
666 | } | |
667 | ||
668 | llm = *((typeof(llm) *) reply->buffer.data); | |
669 | ||
670 | /* Check error code if OK */ | |
671 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
672 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
673 | /* Invalid error code received. */ | |
674 | ret = -LTTNG_ERR_UNK; | |
675 | } else { | |
676 | ret = -llm.ret_code; | |
677 | } | |
e368fb43 JG |
678 | goto end; |
679 | } | |
680 | ||
681 | if (llm.cmd_header_size > 0) { | |
682 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
683 | if (ret < 0) { | |
684 | goto end; | |
685 | } | |
686 | } | |
687 | ||
688 | /* Get command header from data transmission */ | |
689 | if (llm.data_size > 0) { | |
690 | ret = recv_payload_sessiond(reply, llm.data_size); | |
691 | if (ret < 0) { | |
692 | goto end; | |
693 | } | |
694 | } | |
695 | ||
696 | if (llm.fd_count > 0) { | |
fe489250 JG |
697 | ret = lttcomm_recv_payload_fds_unix_sock( |
698 | sessiond_socket, llm.fd_count, reply); | |
699 | if (ret < 0) { | |
e368fb43 JG |
700 | goto end; |
701 | } | |
702 | } | |
703 | ||
704 | /* Don't return the llm header to the caller. */ | |
705 | memmove(reply->buffer.data, reply->buffer.data + sizeof(llm), | |
706 | reply->buffer.size - sizeof(llm)); | |
707 | ret = lttng_dynamic_buffer_set_size( | |
708 | &reply->buffer, reply->buffer.size - sizeof(llm)); | |
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 | */ |
cd80958d DG |
726 | struct lttng_handle *lttng_create_handle(const char *session_name, |
727 | struct lttng_domain *domain) | |
9f19cc17 | 728 | { |
e1b624d0 | 729 | int ret; |
2f70b271 DG |
730 | struct lttng_handle *handle = NULL; |
731 | ||
4bd69c5f | 732 | handle = (lttng_handle *) zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 733 | if (handle == NULL) { |
2f70b271 | 734 | PERROR("malloc handle"); |
cd80958d DG |
735 | goto end; |
736 | } | |
737 | ||
738 | /* Copy session name */ | |
e1b624d0 JG |
739 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
740 | sizeof(handle->session_name)); | |
741 | if (ret) { | |
742 | goto error; | |
743 | } | |
cd80958d | 744 | |
95681498 JG |
745 | /* Copy lttng domain or leave initialized to 0. */ |
746 | if (domain) { | |
747 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
748 | } | |
cd80958d DG |
749 | |
750 | end: | |
751 | return handle; | |
e1b624d0 JG |
752 | error: |
753 | free(handle); | |
754 | return NULL; | |
cd80958d DG |
755 | } |
756 | ||
757 | /* | |
758 | * Destroy handle by free(3) the pointer. | |
759 | */ | |
760 | void lttng_destroy_handle(struct lttng_handle *handle) | |
761 | { | |
0e428499 | 762 | free(handle); |
eb354453 DG |
763 | } |
764 | ||
d9800920 DG |
765 | /* |
766 | * Register an outside consumer. | |
9ae110e2 | 767 | * |
1c8d13c8 | 768 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
769 | */ |
770 | int lttng_register_consumer(struct lttng_handle *handle, | |
771 | const char *socket_path) | |
772 | { | |
e1b624d0 | 773 | int ret; |
d9800920 DG |
774 | struct lttcomm_session_msg lsm; |
775 | ||
2f70b271 | 776 | if (handle == NULL || socket_path == NULL) { |
e1b624d0 JG |
777 | ret = -LTTNG_ERR_INVALID; |
778 | goto end; | |
2f70b271 DG |
779 | } |
780 | ||
53efb85a | 781 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 782 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
e1b624d0 | 783 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 784 | sizeof(lsm.session.name)); |
e1b624d0 JG |
785 | if (ret) { |
786 | ret = -LTTNG_ERR_INVALID; | |
787 | goto end; | |
788 | } | |
789 | ||
60160d2a | 790 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 791 | |
e1b624d0 JG |
792 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
793 | sizeof(lsm.u.reg.path)); | |
794 | if (ret) { | |
795 | ret = -LTTNG_ERR_INVALID; | |
796 | goto end; | |
797 | } | |
d9800920 | 798 | |
e1b624d0 JG |
799 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
800 | end: | |
801 | return ret; | |
d9800920 DG |
802 | } |
803 | ||
1df4dedd | 804 | /* |
9ae110e2 JG |
805 | * Start tracing for all traces of the session. |
806 | * | |
807 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 808 | */ |
6a4f824d | 809 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 810 | { |
e1b624d0 | 811 | int ret; |
cd80958d DG |
812 | struct lttcomm_session_msg lsm; |
813 | ||
6a4f824d | 814 | if (session_name == NULL) { |
e1b624d0 JG |
815 | ret = -LTTNG_ERR_INVALID; |
816 | goto end; | |
cd80958d DG |
817 | } |
818 | ||
53efb85a | 819 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 820 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 821 | |
e1b624d0 JG |
822 | ret = lttng_strncpy(lsm.session.name, session_name, |
823 | sizeof(lsm.session.name)); | |
824 | if (ret) { | |
825 | ret = -LTTNG_ERR_INVALID; | |
826 | goto end; | |
827 | } | |
cd80958d | 828 | |
e1b624d0 JG |
829 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
830 | end: | |
831 | return ret; | |
f3ed775e | 832 | } |
1df4dedd DG |
833 | |
834 | /* | |
38ee087f | 835 | * Stop tracing for all traces of the session. |
f3ed775e | 836 | */ |
38ee087f | 837 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 838 | { |
38ee087f | 839 | int ret, data_ret; |
cd80958d DG |
840 | struct lttcomm_session_msg lsm; |
841 | ||
6a4f824d | 842 | if (session_name == NULL) { |
e1b624d0 JG |
843 | ret = -LTTNG_ERR_INVALID; |
844 | goto error; | |
6a4f824d DG |
845 | } |
846 | ||
53efb85a | 847 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 848 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 849 | |
e1b624d0 JG |
850 | ret = lttng_strncpy(lsm.session.name, session_name, |
851 | sizeof(lsm.session.name)); | |
852 | if (ret) { | |
853 | ret = -LTTNG_ERR_INVALID; | |
854 | goto error; | |
855 | } | |
cd80958d | 856 | |
cac3069d | 857 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
858 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
859 | goto error; | |
860 | } | |
861 | ||
862 | if (!wait) { | |
863 | goto end; | |
864 | } | |
865 | ||
38ee087f DG |
866 | /* Check for data availability */ |
867 | do { | |
6d805429 | 868 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
869 | if (data_ret < 0) { |
870 | /* Return the data available call error. */ | |
871 | ret = data_ret; | |
872 | goto error; | |
873 | } | |
874 | ||
875 | /* | |
9ae110e2 JG |
876 | * Data sleep time before retrying (in usec). Don't sleep if the |
877 | * call returned value indicates availability. | |
38ee087f | 878 | */ |
6d805429 | 879 | if (data_ret) { |
c8f61fd4 | 880 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 881 | } |
6d805429 | 882 | } while (data_ret != 0); |
38ee087f | 883 | |
38ee087f DG |
884 | end: |
885 | error: | |
886 | return ret; | |
887 | } | |
888 | ||
889 | /* | |
890 | * Stop tracing and wait for data availability. | |
891 | */ | |
892 | int lttng_stop_tracing(const char *session_name) | |
893 | { | |
894 | return _lttng_stop_tracing(session_name, 1); | |
895 | } | |
896 | ||
897 | /* | |
898 | * Stop tracing but _don't_ wait for data availability. | |
899 | */ | |
900 | int lttng_stop_tracing_no_wait(const char *session_name) | |
901 | { | |
902 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
903 | } |
904 | ||
905 | /* | |
601d5acf DG |
906 | * Add context to a channel. |
907 | * | |
908 | * If the given channel is NULL, add the contexts to all channels. | |
909 | * The event_name param is ignored. | |
af87c45a DG |
910 | * |
911 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 912 | */ |
cd80958d | 913 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
914 | struct lttng_event_context *ctx, const char *event_name, |
915 | const char *channel_name) | |
d65106b1 | 916 | { |
2001793c JG |
917 | int ret; |
918 | size_t len = 0; | |
919 | char *buf = NULL; | |
cd80958d DG |
920 | struct lttcomm_session_msg lsm; |
921 | ||
9ae110e2 | 922 | /* Safety check. Both are mandatory. */ |
9d697d3d | 923 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
924 | ret = -LTTNG_ERR_INVALID; |
925 | goto end; | |
cd80958d DG |
926 | } |
927 | ||
441c16a7 | 928 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
929 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
930 | ||
85076754 | 931 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
932 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
933 | sizeof(lsm.u.context.channel_name)); | |
934 | if (ret) { | |
935 | ret = -LTTNG_ERR_INVALID; | |
936 | goto end; | |
85076754 | 937 | } |
cd80958d | 938 | |
60160d2a | 939 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
e1b624d0 | 940 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 941 | sizeof(lsm.session.name)); |
e1b624d0 JG |
942 | if (ret) { |
943 | ret = -LTTNG_ERR_INVALID; | |
944 | goto end; | |
945 | } | |
cd80958d | 946 | |
2001793c JG |
947 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
948 | size_t provider_len, ctx_len; | |
949 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
950 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
951 | ||
952 | if (!provider_name || !ctx_name) { | |
953 | ret = -LTTNG_ERR_INVALID; | |
954 | goto end; | |
955 | } | |
956 | ||
957 | provider_len = strlen(provider_name); | |
958 | if (provider_len == 0) { | |
959 | ret = -LTTNG_ERR_INVALID; | |
960 | goto end; | |
961 | } | |
962 | lsm.u.context.provider_name_len = provider_len; | |
963 | ||
964 | ctx_len = strlen(ctx_name); | |
965 | if (ctx_len == 0) { | |
966 | ret = -LTTNG_ERR_INVALID; | |
967 | goto end; | |
968 | } | |
969 | lsm.u.context.context_name_len = ctx_len; | |
970 | ||
971 | len = provider_len + ctx_len; | |
4bd69c5f | 972 | buf = (char *) zmalloc(len); |
2001793c JG |
973 | if (!buf) { |
974 | ret = -LTTNG_ERR_NOMEM; | |
975 | goto end; | |
976 | } | |
977 | ||
978 | memcpy(buf, provider_name, provider_len); | |
979 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
980 | } | |
981 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
982 | |
983 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
984 | /* | |
985 | * Don't leak application addresses to the sessiond. | |
986 | * This is only necessary when ctx is for an app ctx otherwise | |
987 | * the values inside the union (type & config) are overwritten. | |
988 | */ | |
989 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
990 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
991 | } | |
2001793c | 992 | |
795a978d | 993 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
994 | end: |
995 | free(buf); | |
996 | return ret; | |
d65106b1 DG |
997 | } |
998 | ||
f3ed775e | 999 | /* |
9ae110e2 JG |
1000 | * Enable event(s) for a channel. |
1001 | * | |
1002 | * If no event name is specified, all events are enabled. | |
1003 | * If no channel name is specified, the default 'channel0' is used. | |
1004 | * | |
1005 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 1006 | */ |
cd80958d | 1007 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 1008 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 1009 | { |
f8a96544 JI |
1010 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
1011 | NULL, 0, NULL); | |
1df4dedd DG |
1012 | } |
1013 | ||
53a80697 | 1014 | /* |
025faf73 | 1015 | * Create or enable an event with a filter expression. |
178191b3 | 1016 | * |
53a80697 MD |
1017 | * Return negative error value on error. |
1018 | * Return size of returned session payload data if OK. | |
1019 | */ | |
025faf73 | 1020 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 1021 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
1022 | const char *filter_expression) |
1023 | { | |
f8a96544 JI |
1024 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
1025 | filter_expression, 0, NULL); | |
53a80697 MD |
1026 | } |
1027 | ||
347c5ab5 | 1028 | /* |
0e115563 | 1029 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1030 | * NULL if not applicable. |
1031 | * | |
1032 | * An event with NO loglevel and the name is * will return NULL. | |
1033 | */ | |
0e115563 | 1034 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1035 | { |
1036 | int err; | |
0e115563 | 1037 | char *agent_filter = NULL; |
347c5ab5 | 1038 | |
a0377dfe | 1039 | LTTNG_ASSERT(ev); |
347c5ab5 DG |
1040 | |
1041 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1042 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1043 | if (filter) { |
0e115563 | 1044 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
1045 | ev->name); |
1046 | } else { | |
0e115563 | 1047 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1048 | } |
1049 | if (err < 0) { | |
1050 | PERROR("asprintf"); | |
6a556f7b | 1051 | goto error; |
347c5ab5 DG |
1052 | } |
1053 | } | |
1054 | ||
1055 | /* Add loglevel filtering if any for the JUL domain. */ | |
1056 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1057 | const char *op; |
347c5ab5 DG |
1058 | |
1059 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1060 | op = ">="; | |
1061 | } else { | |
1062 | op = "=="; | |
1063 | } | |
1064 | ||
0e115563 | 1065 | if (filter || agent_filter) { |
6a556f7b JG |
1066 | char *new_filter; |
1067 | ||
fb0edb23 | 1068 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 1069 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 1070 | ev->loglevel); |
0e115563 DG |
1071 | if (agent_filter) { |
1072 | free(agent_filter); | |
6a556f7b | 1073 | } |
0e115563 | 1074 | agent_filter = new_filter; |
347c5ab5 | 1075 | } else { |
0e115563 | 1076 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
1077 | ev->loglevel); |
1078 | } | |
1079 | if (err < 0) { | |
1080 | PERROR("asprintf"); | |
6a556f7b | 1081 | goto error; |
347c5ab5 DG |
1082 | } |
1083 | } | |
1084 | ||
0e115563 | 1085 | return agent_filter; |
6a556f7b | 1086 | error: |
0e115563 | 1087 | free(agent_filter); |
6a556f7b | 1088 | return NULL; |
347c5ab5 DG |
1089 | } |
1090 | ||
93deb080 JI |
1091 | /* |
1092 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1093 | * If no event name is specified, all events are enabled. | |
1094 | * If no channel name is specified, the default name is used. | |
1095 | * If filter expression is not NULL, the filter is set for the event. | |
1096 | * If exclusion count is not zero, the exclusions are set for the event. | |
1097 | * Returns size of returned session payload data or a negative error code. | |
1098 | */ | |
1099 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1100 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1101 | const char *original_filter_expression, |
93deb080 JI |
1102 | int exclusion_count, char **exclusion_list) |
1103 | { | |
1104 | struct lttcomm_session_msg lsm; | |
e368fb43 JG |
1105 | struct lttng_payload payload; |
1106 | int ret = 0, i; | |
137b9942 | 1107 | unsigned int free_filter_expression = 0; |
93deb080 | 1108 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1109 | |
6a0838b7 YL |
1110 | /* |
1111 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1112 | * a variable-length payload from where to send the data. |
6a0838b7 | 1113 | */ |
e368fb43 | 1114 | lttng_payload_init(&payload); |
ec005ec6 | 1115 | |
e9efbcd3 JG |
1116 | /* |
1117 | * Cast as non-const since we may replace the filter expression | |
1118 | * by a dynamically allocated string. Otherwise, the original | |
1119 | * string is not modified. | |
1120 | */ | |
1121 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1122 | |
1123 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1124 | ret = -LTTNG_ERR_INVALID; |
1125 | goto error; | |
93deb080 JI |
1126 | } |
1127 | ||
9ae110e2 JG |
1128 | /* |
1129 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1130 | * anyway, so treat this corner-case early to eliminate |
1131 | * lttng_fmemopen error for 0-byte allocation. | |
1132 | */ | |
1133 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1134 | ret = -LTTNG_ERR_INVALID; |
1135 | goto error; | |
93deb080 JI |
1136 | } |
1137 | ||
1138 | memset(&lsm, 0, sizeof(lsm)); | |
1139 | ||
1140 | /* If no channel name, send empty string. */ | |
e1b624d0 JG |
1141 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", |
1142 | sizeof(lsm.u.enable.channel_name)); | |
1143 | if (ret) { | |
1144 | ret = -LTTNG_ERR_INVALID; | |
1145 | goto error; | |
93deb080 JI |
1146 | } |
1147 | ||
18a720cd MD |
1148 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1149 | if (ev->name[0] == '\0') { | |
e1b624d0 JG |
1150 | /* Enable all events. */ |
1151 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
a0377dfe | 1152 | LTTNG_ASSERT(ret == 0); |
6565421f | 1153 | } |
93deb080 | 1154 | |
60160d2a | 1155 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1156 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1157 | ||
e1b624d0 | 1158 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
93deb080 | 1159 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1160 | if (ret) { |
1161 | ret = -LTTNG_ERR_INVALID; | |
1162 | goto error; | |
1163 | } | |
1164 | ||
93deb080 JI |
1165 | lsm.u.enable.exclusion_count = exclusion_count; |
1166 | lsm.u.enable.bytecode_len = 0; | |
1167 | ||
9ae110e2 | 1168 | /* Parse filter expression. */ |
5cdb6027 | 1169 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1170 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1171 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1172 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1173 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1174 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1175 | char *agent_filter; | |
64226865 | 1176 | |
347c5ab5 | 1177 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1178 | agent_filter = set_agent_filter(filter_expression, ev); |
1179 | if (!agent_filter) { | |
137b9942 | 1180 | if (!filter_expression) { |
9ae110e2 JG |
1181 | /* |
1182 | * No JUL and no filter, just skip | |
1183 | * everything below. | |
1184 | */ | |
137b9942 DG |
1185 | goto ask_sessiond; |
1186 | } | |
64226865 DG |
1187 | } else { |
1188 | /* | |
9ae110e2 JG |
1189 | * With an agent filter, the original filter has |
1190 | * been added to it thus replace the filter | |
1191 | * expression. | |
64226865 | 1192 | */ |
0e115563 | 1193 | filter_expression = agent_filter; |
e9efbcd3 | 1194 | free_filter_expression = 1; |
9b21e6d5 | 1195 | } |
9b21e6d5 | 1196 | } |
93deb080 | 1197 | |
e4d2f27a | 1198 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1199 | if (ret) { |
137b9942 | 1200 | goto filter_error; |
93deb080 | 1201 | } |
e4d2f27a JR |
1202 | |
1203 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1204 | + bytecode_get_len(&ctx->bytecode->b); | |
1205 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6b453b5e JG |
1206 | } |
1207 | ||
e368fb43 JG |
1208 | ret = lttng_dynamic_buffer_set_capacity(&payload.buffer, |
1209 | lsm.u.enable.bytecode_len + | |
1210 | lsm.u.enable.expression_len + | |
1211 | LTTNG_SYMBOL_NAME_LEN * | |
1212 | exclusion_count); | |
15e37663 | 1213 | if (ret) { |
6b453b5e | 1214 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1215 | goto mem_error; |
6b453b5e | 1216 | } |
137b9942 | 1217 | |
9ae110e2 | 1218 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1219 | for (i = 0; i < exclusion_count; i++) { |
1220 | size_t exclusion_len; | |
1221 | ||
53a5c209 | 1222 | exclusion_len = lttng_strnlen(exclusion_list[i], |
15e37663 JG |
1223 | LTTNG_SYMBOL_NAME_LEN); |
1224 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1225 | /* Exclusion is not NULL-terminated. */ | |
1226 | ret = -LTTNG_ERR_INVALID; | |
1227 | goto mem_error; | |
1228 | } | |
1229 | ||
e368fb43 | 1230 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
53a5c209 FD |
1231 | exclusion_list[i], exclusion_len); |
1232 | if (ret) { | |
1233 | goto mem_error; | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Padding the rest of the entry with zeros. Every exclusion | |
1238 | * entries take LTTNG_SYMBOL_NAME_LEN bytes in the buffer. | |
1239 | */ | |
1240 | ret = lttng_dynamic_buffer_set_size(&payload.buffer, | |
1241 | LTTNG_SYMBOL_NAME_LEN * (i + 1)); | |
15e37663 JG |
1242 | if (ret) { |
1243 | goto mem_error; | |
1244 | } | |
6b453b5e | 1245 | } |
15e37663 | 1246 | |
9ae110e2 | 1247 | /* Add filter expression next. */ |
15e37663 | 1248 | if (filter_expression) { |
e368fb43 | 1249 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1250 | filter_expression, lsm.u.enable.expression_len); |
1251 | if (ret) { | |
1252 | goto mem_error; | |
1253 | } | |
6b453b5e | 1254 | } |
9ae110e2 | 1255 | /* Add filter bytecode next. */ |
137b9942 | 1256 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
e368fb43 | 1257 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1258 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); |
1259 | if (ret) { | |
1260 | goto mem_error; | |
1261 | } | |
1262 | } | |
1263 | if (ev->extended.ptr) { | |
1264 | struct lttng_event_extended *ev_ext = | |
1265 | (struct lttng_event_extended *) ev->extended.ptr; | |
1266 | ||
1267 | if (ev_ext->probe_location) { | |
1268 | /* | |
1269 | * lttng_userspace_probe_location_serialize returns the | |
1270 | * number of bytes that was appended to the buffer. | |
1271 | */ | |
1272 | ret = lttng_userspace_probe_location_serialize( | |
e368fb43 | 1273 | ev_ext->probe_location, &payload); |
56f0bc67 | 1274 | if (ret < 0) { |
15e37663 JG |
1275 | goto mem_error; |
1276 | } | |
1277 | ||
15e37663 JG |
1278 | /* |
1279 | * Set the size of the userspace probe location element | |
1280 | * of the buffer so that the receiving side knows where | |
1281 | * to split it. | |
1282 | */ | |
1283 | lsm.u.enable.userspace_probe_location_len = ret; | |
1284 | } | |
93deb080 JI |
1285 | } |
1286 | ||
e368fb43 JG |
1287 | { |
1288 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1289 | &payload, 0, -1); | |
fe489250 | 1290 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1291 | int fd_to_send; |
1292 | ||
1293 | if (fd_count < 0) { | |
1294 | goto mem_error; | |
1295 | } | |
1296 | ||
a0377dfe | 1297 | LTTNG_ASSERT(fd_count == 0 || fd_count == 1); |
e368fb43 | 1298 | if (fd_count == 1) { |
e2fc8e9d | 1299 | struct fd_handle *h = |
fe489250 JG |
1300 | lttng_payload_view_pop_fd_handle(&view); |
1301 | ||
e2fc8e9d | 1302 | if (!h) { |
e368fb43 JG |
1303 | goto mem_error; |
1304 | } | |
1305 | ||
e2fc8e9d SM |
1306 | fd_to_send = fd_handle_get_fd(h); |
1307 | fd_handle_put(h); | |
e368fb43 JG |
1308 | } |
1309 | ||
1310 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1311 | fd_count ? &fd_to_send : NULL, fd_count, | |
1312 | view.buffer.size ? view.buffer.data : NULL, | |
1313 | view.buffer.size, NULL, NULL, 0); | |
1314 | } | |
93deb080 | 1315 | |
7ca1dc6f DG |
1316 | mem_error: |
1317 | if (filter_expression && ctx) { | |
93deb080 JI |
1318 | filter_bytecode_free(ctx); |
1319 | filter_ir_free(ctx); | |
1320 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1321 | } |
1322 | filter_error: | |
1323 | if (free_filter_expression) { | |
1324 | /* | |
9ae110e2 JG |
1325 | * The filter expression has been replaced and must be freed as |
1326 | * it is not the original filter expression received as a | |
1327 | * parameter. | |
7ca1dc6f DG |
1328 | */ |
1329 | free(filter_expression); | |
93deb080 | 1330 | } |
137b9942 DG |
1331 | error: |
1332 | /* | |
9ae110e2 JG |
1333 | * Return directly to the caller and don't ask the sessiond since |
1334 | * something went wrong in the parsing of data above. | |
137b9942 | 1335 | */ |
e368fb43 | 1336 | lttng_payload_reset(&payload); |
93deb080 | 1337 | return ret; |
3e1c9ff7 DG |
1338 | |
1339 | ask_sessiond: | |
1340 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1341 | return ret; | |
93deb080 JI |
1342 | } |
1343 | ||
6e911cad MD |
1344 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1345 | struct lttng_event *ev, const char *channel_name, | |
1346 | const char *original_filter_expression) | |
1df4dedd | 1347 | { |
cd80958d | 1348 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1349 | char *varlen_data; |
1350 | int ret = 0; | |
1351 | unsigned int free_filter_expression = 0; | |
1352 | struct filter_parser_ctx *ctx = NULL; | |
1353 | /* | |
1354 | * Cast as non-const since we may replace the filter expression | |
1355 | * by a dynamically allocated string. Otherwise, the original | |
1356 | * string is not modified. | |
1357 | */ | |
1358 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1359 | |
6e911cad MD |
1360 | if (handle == NULL || ev == NULL) { |
1361 | ret = -LTTNG_ERR_INVALID; | |
1362 | goto error; | |
1363 | } | |
1364 | ||
9ae110e2 JG |
1365 | /* |
1366 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1367 | * anyway, so treat this corner-case early to eliminate |
1368 | * lttng_fmemopen error for 0-byte allocation. | |
1369 | */ | |
1370 | if (filter_expression && filter_expression[0] == '\0') { | |
1371 | ret = -LTTNG_ERR_INVALID; | |
1372 | goto error; | |
cd80958d DG |
1373 | } |
1374 | ||
441c16a7 MD |
1375 | memset(&lsm, 0, sizeof(lsm)); |
1376 | ||
85076754 | 1377 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
1378 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", |
1379 | sizeof(lsm.u.disable.channel_name)); | |
1380 | if (ret) { | |
1381 | ret = -LTTNG_ERR_INVALID; | |
1382 | goto error; | |
eb354453 DG |
1383 | } |
1384 | ||
18a720cd | 1385 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1386 | |
60160d2a | 1387 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1388 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1389 | ||
e1b624d0 | 1390 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 1391 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1392 | if (ret) { |
1393 | ret = -LTTNG_ERR_INVALID; | |
1394 | goto error; | |
1395 | } | |
1396 | ||
6e911cad | 1397 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1398 | |
6e911cad MD |
1399 | /* |
1400 | * For the JUL domain, a filter is enforced except for the | |
1401 | * disable all event. This is done to avoid having the event in | |
1402 | * all sessions thus filtering by logger name. | |
1403 | */ | |
1404 | if (filter_expression == NULL && | |
1405 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1406 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1407 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1408 | goto ask_sessiond; |
1409 | } | |
1410 | ||
1411 | /* | |
1412 | * We have a filter, so we need to set up a variable-length | |
1413 | * memory block from where to send the data. | |
1414 | */ | |
1415 | ||
1416 | /* Parse filter expression */ | |
1417 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1418 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1419 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1420 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1421 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1422 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1423 | char *agent_filter; | |
6e911cad MD |
1424 | |
1425 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1426 | agent_filter = set_agent_filter(filter_expression, ev); |
1427 | if (!agent_filter) { | |
6e911cad | 1428 | if (!filter_expression) { |
9ae110e2 JG |
1429 | /* |
1430 | * No JUL and no filter, just skip | |
1431 | * everything below. | |
1432 | */ | |
6e911cad MD |
1433 | goto ask_sessiond; |
1434 | } | |
1435 | } else { | |
1436 | /* | |
9ae110e2 JG |
1437 | * With a JUL filter, the original filter has |
1438 | * been added to it thus replace the filter | |
1439 | * expression. | |
6e911cad | 1440 | */ |
0e115563 | 1441 | filter_expression = agent_filter; |
6e911cad MD |
1442 | free_filter_expression = 1; |
1443 | } | |
1444 | } | |
1445 | ||
e4d2f27a | 1446 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad MD |
1447 | if (ret) { |
1448 | goto filter_error; | |
1449 | } | |
e4d2f27a JR |
1450 | |
1451 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1452 | + bytecode_get_len(&ctx->bytecode->b); | |
1453 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6e911cad MD |
1454 | } |
1455 | ||
4bd69c5f | 1456 | varlen_data = (char *) zmalloc(lsm.u.disable.bytecode_len |
6e911cad MD |
1457 | + lsm.u.disable.expression_len); |
1458 | if (!varlen_data) { | |
1459 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1460 | goto mem_error; | |
1461 | } | |
1462 | ||
9ae110e2 | 1463 | /* Add filter expression. */ |
6e911cad MD |
1464 | if (lsm.u.disable.expression_len != 0) { |
1465 | memcpy(varlen_data, | |
1466 | filter_expression, | |
1467 | lsm.u.disable.expression_len); | |
1468 | } | |
9ae110e2 | 1469 | /* Add filter bytecode next. */ |
6e911cad MD |
1470 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1471 | memcpy(varlen_data | |
1472 | + lsm.u.disable.expression_len, | |
1473 | &ctx->bytecode->b, | |
1474 | lsm.u.disable.bytecode_len); | |
1475 | } | |
1476 | ||
795a978d | 1477 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1478 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1479 | free(varlen_data); | |
1480 | ||
1481 | mem_error: | |
1482 | if (filter_expression && ctx) { | |
1483 | filter_bytecode_free(ctx); | |
1484 | filter_ir_free(ctx); | |
1485 | filter_parser_ctx_free(ctx); | |
1486 | } | |
1487 | filter_error: | |
1488 | if (free_filter_expression) { | |
1489 | /* | |
9ae110e2 JG |
1490 | * The filter expression has been replaced and must be freed as |
1491 | * it is not the original filter expression received as a | |
1492 | * parameter. | |
6e911cad MD |
1493 | */ |
1494 | free(filter_expression); | |
1495 | } | |
1496 | error: | |
1497 | /* | |
9ae110e2 JG |
1498 | * Return directly to the caller and don't ask the sessiond since |
1499 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1500 | */ |
1501 | return ret; | |
1502 | ||
1503 | ask_sessiond: | |
1504 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1505 | return ret; | |
1506 | } | |
1507 | ||
1508 | /* | |
9ae110e2 JG |
1509 | * Disable event(s) of a channel and domain. |
1510 | * If no event name is specified, all events are disabled. | |
1511 | * If no channel name is specified, the default 'channel0' is used. | |
1512 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1513 | */ |
1514 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1515 | const char *channel_name) | |
1516 | { | |
e1b624d0 | 1517 | int ret; |
6e911cad MD |
1518 | struct lttng_event ev; |
1519 | ||
1520 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1521 | ev.loglevel = -1; |
6e911cad | 1522 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1523 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1524 | if (ret) { | |
1525 | ret = -LTTNG_ERR_INVALID; | |
1526 | goto end; | |
1527 | } | |
1528 | ||
1529 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1530 | end: | |
1531 | return ret; | |
1df4dedd DG |
1532 | } |
1533 | ||
cf0bcb51 JG |
1534 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1535 | { | |
1536 | struct lttng_channel *channel = NULL; | |
1537 | struct lttng_channel_extended *extended = NULL; | |
1538 | ||
1539 | if (!domain) { | |
1540 | goto error; | |
1541 | } | |
1542 | ||
1543 | /* Validate domain. */ | |
1544 | switch (domain->type) { | |
1545 | case LTTNG_DOMAIN_UST: | |
1546 | switch (domain->buf_type) { | |
1547 | case LTTNG_BUFFER_PER_UID: | |
1548 | case LTTNG_BUFFER_PER_PID: | |
1549 | break; | |
1550 | default: | |
1551 | goto error; | |
1552 | } | |
1553 | break; | |
1554 | case LTTNG_DOMAIN_KERNEL: | |
1555 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1556 | goto error; | |
1557 | } | |
1558 | break; | |
1559 | default: | |
1560 | goto error; | |
1561 | } | |
1562 | ||
4bd69c5f | 1563 | channel = (lttng_channel *) zmalloc(sizeof(*channel)); |
cf0bcb51 JG |
1564 | if (!channel) { |
1565 | goto error; | |
1566 | } | |
1567 | ||
4bd69c5f | 1568 | extended = (lttng_channel_extended *) zmalloc(sizeof(*extended)); |
cf0bcb51 JG |
1569 | if (!extended) { |
1570 | goto error; | |
1571 | } | |
1572 | ||
1573 | channel->attr.extended.ptr = extended; | |
1574 | ||
1575 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1576 | return channel; | |
1577 | error: | |
1578 | free(channel); | |
1579 | free(extended); | |
1580 | return NULL; | |
1581 | } | |
1582 | ||
1583 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1584 | { | |
1585 | if (!channel) { | |
1586 | return; | |
1587 | } | |
1588 | ||
1589 | if (channel->attr.extended.ptr) { | |
1590 | free(channel->attr.extended.ptr); | |
1591 | } | |
1592 | free(channel); | |
1593 | } | |
1594 | ||
1df4dedd | 1595 | /* |
9ae110e2 JG |
1596 | * Enable channel per domain |
1597 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1598 | */ |
cd80958d | 1599 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1600 | struct lttng_channel *in_chan) |
a5c5a2bd | 1601 | { |
13dd7782 | 1602 | enum lttng_error_code ret_code; |
e1b624d0 | 1603 | int ret; |
cd80958d | 1604 | struct lttcomm_session_msg lsm; |
13dd7782 | 1605 | uint64_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1606 | |
9ae110e2 | 1607 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1608 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1609 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1610 | } |
1611 | ||
441c16a7 | 1612 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1613 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1614 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1615 | |
cf0bcb51 JG |
1616 | if (!in_chan->attr.extended.ptr) { |
1617 | struct lttng_channel *channel; | |
1618 | struct lttng_channel_extended *extended; | |
7d29a247 | 1619 | |
cf0bcb51 JG |
1620 | channel = lttng_channel_create(&handle->domain); |
1621 | if (!channel) { | |
1622 | return -LTTNG_ERR_NOMEM; | |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | * Create a new channel in order to use default extended | |
1627 | * attribute values. | |
1628 | */ | |
1629 | extended = (struct lttng_channel_extended *) | |
1630 | channel->attr.extended.ptr; | |
1631 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1632 | lttng_channel_destroy(channel); | |
1633 | } else { | |
1634 | struct lttng_channel_extended *extended; | |
1635 | ||
1636 | extended = (struct lttng_channel_extended *) | |
1637 | in_chan->attr.extended.ptr; | |
1638 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1639 | } | |
cd80958d | 1640 | |
09b72f7a FD |
1641 | /* |
1642 | * Verify that the amount of memory required to create the requested | |
1643 | * buffer is available on the system at the moment. | |
1644 | */ | |
13dd7782 JR |
1645 | if (lsm.u.channel.chan.attr.num_subbuf > |
1646 | UINT64_MAX / lsm.u.channel.chan.attr.subbuf_size) { | |
1647 | /* Overflow */ | |
1648 | ret = -LTTNG_ERR_OVERFLOW; | |
1649 | goto end; | |
1650 | } | |
1651 | ||
09b72f7a FD |
1652 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * |
1653 | lsm.u.channel.chan.attr.subbuf_size; | |
13dd7782 JR |
1654 | ret_code = check_enough_available_memory( |
1655 | total_buffer_size_needed_per_cpu); | |
1656 | if (ret_code != LTTNG_OK) { | |
1657 | ret = -ret_code; | |
1658 | goto end; | |
09b72f7a FD |
1659 | } |
1660 | ||
cf0bcb51 | 1661 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1662 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1663 | |
e1b624d0 JG |
1664 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1665 | sizeof(lsm.session.name)); | |
1666 | if (ret) { | |
1667 | ret = -LTTNG_ERR_INVALID; | |
1668 | goto end; | |
1669 | } | |
cd80958d | 1670 | |
e1b624d0 JG |
1671 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1672 | end: | |
1673 | return ret; | |
8c0faa1d | 1674 | } |
1df4dedd | 1675 | |
2ef84c95 | 1676 | /* |
9ae110e2 JG |
1677 | * All tracing will be stopped for registered events of the channel. |
1678 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1679 | */ |
cd80958d | 1680 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1681 | { |
e1b624d0 | 1682 | int ret; |
cd80958d DG |
1683 | struct lttcomm_session_msg lsm; |
1684 | ||
9ae110e2 | 1685 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1686 | if (handle == NULL || name == NULL) { |
2f70b271 | 1687 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1688 | } |
1689 | ||
441c16a7 MD |
1690 | memset(&lsm, 0, sizeof(lsm)); |
1691 | ||
cd80958d | 1692 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1693 | |
e1b624d0 | 1694 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1695 | sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1696 | if (ret) { |
1697 | ret = -LTTNG_ERR_INVALID; | |
1698 | goto end; | |
1699 | } | |
9d697d3d | 1700 | |
60160d2a | 1701 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1702 | |
e1b624d0 JG |
1703 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1704 | sizeof(lsm.session.name)); | |
1705 | if (ret) { | |
1706 | ret = -LTTNG_ERR_INVALID; | |
1707 | goto end; | |
1708 | } | |
cd80958d | 1709 | |
e1b624d0 JG |
1710 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1711 | end: | |
1712 | return ret; | |
ca95a216 DG |
1713 | } |
1714 | ||
fac6795d | 1715 | /* |
9ae110e2 JG |
1716 | * Lists all available tracepoints of domain. |
1717 | * Sets the contents of the events array. | |
1718 | * Returns the number of lttng_event entries in events; | |
1719 | * on error, returns a negative value. | |
fac6795d | 1720 | */ |
cd80958d | 1721 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1722 | struct lttng_event **events) |
fac6795d | 1723 | { |
052da939 | 1724 | int ret; |
cd80958d DG |
1725 | struct lttcomm_session_msg lsm; |
1726 | ||
9d697d3d | 1727 | if (handle == NULL) { |
2f70b271 | 1728 | return -LTTNG_ERR_INVALID; |
cd80958d | 1729 | } |
fac6795d | 1730 | |
53efb85a | 1731 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1732 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1733 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1734 | |
cac3069d | 1735 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1736 | if (ret < 0) { |
1737 | return ret; | |
eb354453 | 1738 | } |
fac6795d | 1739 | |
9f19cc17 | 1740 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1741 | } |
1742 | ||
f37d259d | 1743 | /* |
9ae110e2 JG |
1744 | * Lists all available tracepoint fields of domain. |
1745 | * Sets the contents of the event field array. | |
1746 | * Returns the number of lttng_event_field entries in events; | |
1747 | * on error, returns a negative value. | |
f37d259d MD |
1748 | */ |
1749 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1750 | struct lttng_event_field **fields) | |
1751 | { | |
1752 | int ret; | |
1753 | struct lttcomm_session_msg lsm; | |
1754 | ||
1755 | if (handle == NULL) { | |
2f70b271 | 1756 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1757 | } |
1758 | ||
53efb85a | 1759 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1760 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1761 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1762 | |
cac3069d | 1763 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1764 | if (ret < 0) { |
1765 | return ret; | |
1766 | } | |
1767 | ||
1768 | return ret / sizeof(struct lttng_event_field); | |
1769 | } | |
1770 | ||
834978fd | 1771 | /* |
9ae110e2 JG |
1772 | * Lists all available kernel system calls. Allocates and sets the contents of |
1773 | * the events array. | |
834978fd | 1774 | * |
9ae110e2 JG |
1775 | * Returns the number of lttng_event entries in events; on error, returns a |
1776 | * negative value. | |
834978fd DG |
1777 | */ |
1778 | int lttng_list_syscalls(struct lttng_event **events) | |
1779 | { | |
1780 | int ret; | |
1781 | struct lttcomm_session_msg lsm; | |
1782 | ||
1783 | if (!events) { | |
1784 | return -LTTNG_ERR_INVALID; | |
1785 | } | |
1786 | ||
1787 | memset(&lsm, 0, sizeof(lsm)); | |
1788 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1789 | /* Force kernel domain for system calls. */ | |
1790 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1791 | ||
1792 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1793 | if (ret < 0) { | |
1794 | return ret; | |
1795 | } | |
1796 | ||
1797 | return ret / sizeof(struct lttng_event); | |
1798 | } | |
1799 | ||
1657e9bb | 1800 | /* |
9ae110e2 | 1801 | * Returns a human readable string describing |
8346beb6 | 1802 | * the error code (positive or negative value). |
1657e9bb | 1803 | */ |
9a745bc7 | 1804 | const char *lttng_strerror(int code) |
1657e9bb | 1805 | { |
8346beb6 PP |
1806 | if (code > 0) { |
1807 | code = -code; | |
1808 | } | |
1809 | ||
f73fabfd | 1810 | return error_get_str(code); |
1657e9bb DG |
1811 | } |
1812 | ||
b178f53e JG |
1813 | enum lttng_error_code lttng_create_session_ext( |
1814 | struct lttng_session_descriptor *session_descriptor) | |
1815 | { | |
1816 | enum lttng_error_code ret_code; | |
1817 | struct lttcomm_session_msg lsm = { | |
1818 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1819 | }; | |
1820 | void *reply = NULL; | |
1821 | struct lttng_buffer_view reply_view; | |
1822 | int reply_ret; | |
1823 | bool sessiond_must_generate_ouput; | |
1824 | struct lttng_dynamic_buffer payload; | |
1825 | int ret; | |
1826 | size_t descriptor_size; | |
1827 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1828 | ||
1829 | lttng_dynamic_buffer_init(&payload); | |
1830 | if (!session_descriptor) { | |
1831 | ret_code = LTTNG_ERR_INVALID; | |
1832 | goto end; | |
1833 | } | |
1834 | ||
1835 | sessiond_must_generate_ouput = | |
1836 | !lttng_session_descriptor_is_output_destination_initialized( | |
1837 | session_descriptor); | |
1838 | if (sessiond_must_generate_ouput) { | |
1839 | const char *home_dir = utils_get_home_dir(); | |
1840 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1841 | ||
1842 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1843 | ret_code = LTTNG_ERR_FATAL; | |
1844 | goto end; | |
1845 | } | |
1846 | ||
1847 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1848 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1849 | home_dir_len); | |
1850 | if (ret) { | |
1851 | ret_code = LTTNG_ERR_NOMEM; | |
1852 | goto end; | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | descriptor_size = payload.size; | |
1857 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1858 | &payload); | |
1859 | if (ret) { | |
1860 | ret_code = LTTNG_ERR_INVALID; | |
1861 | goto end; | |
1862 | } | |
1863 | descriptor_size = payload.size - descriptor_size; | |
1864 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1865 | ||
1866 | /* Command returns a session descriptor on success. */ | |
1867 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1868 | payload.size, &reply); | |
1869 | if (reply_ret < 0) { | |
4bd69c5f | 1870 | ret_code = (lttng_error_code) -reply_ret; |
b178f53e JG |
1871 | goto end; |
1872 | } else if (reply_ret == 0) { | |
1873 | /* Socket unexpectedly closed by the session daemon. */ | |
1874 | ret_code = LTTNG_ERR_FATAL; | |
1875 | goto end; | |
1876 | } | |
1877 | ||
4bd69c5f | 1878 | reply_view = lttng_buffer_view_init((const char *) reply, 0, reply_ret); |
b178f53e JG |
1879 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, |
1880 | &descriptor_reply); | |
1881 | if (ret < 0) { | |
1882 | ret_code = LTTNG_ERR_FATAL; | |
1883 | goto end; | |
1884 | } | |
1885 | ret_code = LTTNG_OK; | |
1886 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1887 | end: | |
1888 | free(reply); | |
1889 | lttng_dynamic_buffer_reset(&payload); | |
1890 | lttng_session_descriptor_destroy(descriptor_reply); | |
1891 | return ret_code; | |
1892 | } | |
1893 | ||
aaf97519 | 1894 | /* |
b178f53e | 1895 | * Create a new session using name and url for destination. |
a4b92340 | 1896 | * |
780d4bb8 | 1897 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1898 | */ |
a4b92340 | 1899 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1900 | { |
3dd05a85 | 1901 | int ret; |
a4b92340 | 1902 | ssize_t size; |
a4b92340 | 1903 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1904 | struct lttng_session_descriptor *descriptor = NULL; |
1905 | enum lttng_error_code ret_code; | |
00e2e675 | 1906 | |
b178f53e JG |
1907 | if (!name) { |
1908 | ret = -LTTNG_ERR_INVALID; | |
1909 | goto end; | |
00e2e675 DG |
1910 | } |
1911 | ||
bc894455 | 1912 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1913 | if (size < 0) { |
b178f53e JG |
1914 | ret = -LTTNG_ERR_INVALID; |
1915 | goto end; | |
1916 | } | |
1917 | switch (size) { | |
1918 | case 0: | |
1919 | descriptor = lttng_session_descriptor_create(name); | |
1920 | break; | |
1921 | case 1: | |
1922 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1923 | ret = -LTTNG_ERR_INVALID; | |
1924 | goto end; | |
1925 | } | |
1926 | descriptor = lttng_session_descriptor_local_create(name, | |
1927 | uris[0].dst.path); | |
1928 | break; | |
1929 | case 2: | |
1930 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1931 | NULL); | |
1932 | break; | |
1933 | default: | |
1934 | ret = -LTTNG_ERR_INVALID; | |
1935 | goto end; | |
1936 | } | |
1937 | if (!descriptor) { | |
1938 | ret = -LTTNG_ERR_INVALID; | |
1939 | goto end; | |
00e2e675 | 1940 | } |
b178f53e JG |
1941 | ret_code = lttng_create_session_ext(descriptor); |
1942 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1943 | end: | |
1944 | lttng_session_descriptor_destroy(descriptor); | |
1945 | free(uris); | |
1946 | return ret; | |
1947 | } | |
00e2e675 | 1948 | |
b178f53e JG |
1949 | /* |
1950 | * Create a session exclusively used for snapshot. | |
1951 | * | |
780d4bb8 | 1952 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1953 | */ |
1954 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1955 | { | |
1956 | int ret; | |
1957 | enum lttng_error_code ret_code; | |
1958 | ssize_t size; | |
1959 | struct lttng_uri *uris = NULL; | |
1960 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1961 | |
b178f53e JG |
1962 | if (!name) { |
1963 | ret = -LTTNG_ERR_INVALID; | |
1964 | goto end; | |
1965 | } | |
1966 | ||
1967 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1968 | if (size < 0) { | |
1969 | ret = -LTTNG_ERR_INVALID; | |
1970 | goto end; | |
1971 | } | |
1972 | /* | |
1973 | * If the user does not specify a custom subdir, use the session name. | |
1974 | */ | |
1975 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1976 | strlen(uris[0].subdir) == 0) { | |
1977 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1978 | name); | |
1979 | if (ret < 0) { | |
1980 | PERROR("Failed to set session name as network destination sub-directory"); | |
1981 | ret = -LTTNG_ERR_FATAL; | |
1982 | goto end; | |
1983 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1984 | /* Truncated output. */ | |
1985 | ret = -LTTNG_ERR_INVALID; | |
1986 | goto end; | |
1987 | } | |
1988 | } | |
3dd05a85 | 1989 | |
b178f53e JG |
1990 | switch (size) { |
1991 | case 0: | |
1992 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1993 | break; | |
1994 | case 1: | |
1995 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1996 | ret = -LTTNG_ERR_INVALID; | |
1997 | goto end; | |
1998 | } | |
1999 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
2000 | name, | |
2001 | uris[0].dst.path); | |
2002 | break; | |
2003 | case 2: | |
2004 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
2005 | name, | |
2006 | snapshot_url, | |
2007 | NULL); | |
2008 | break; | |
2009 | default: | |
2010 | ret = -LTTNG_ERR_INVALID; | |
2011 | goto end; | |
2012 | } | |
2013 | if (!descriptor) { | |
2014 | ret = -LTTNG_ERR_INVALID; | |
2015 | goto end; | |
2016 | } | |
2017 | ret_code = lttng_create_session_ext(descriptor); | |
2018 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2019 | end: | |
2020 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
2021 | free(uris); |
2022 | return ret; | |
00e2e675 DG |
2023 | } |
2024 | ||
b178f53e JG |
2025 | /* |
2026 | * Create a session exclusively used for live. | |
2027 | * | |
780d4bb8 | 2028 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2029 | */ |
2030 | int lttng_create_session_live(const char *name, const char *url, | |
2031 | unsigned int timer_interval) | |
2032 | { | |
2033 | int ret; | |
2034 | enum lttng_error_code ret_code; | |
2035 | struct lttng_session_descriptor *descriptor = NULL; | |
2036 | ||
2037 | if (!name) { | |
2038 | ret = -LTTNG_ERR_INVALID; | |
2039 | goto end; | |
2040 | } | |
2041 | ||
2042 | if (url) { | |
2043 | descriptor = lttng_session_descriptor_live_network_create( | |
2044 | name, url, NULL, timer_interval); | |
2045 | } else { | |
2046 | descriptor = lttng_session_descriptor_live_create( | |
2047 | name, timer_interval); | |
2048 | } | |
2049 | if (!descriptor) { | |
2050 | ret = -LTTNG_ERR_INVALID; | |
2051 | goto end; | |
2052 | } | |
2053 | ret_code = lttng_create_session_ext(descriptor); | |
2054 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2055 | end: | |
2056 | lttng_session_descriptor_destroy(descriptor); | |
2057 | return ret; | |
2058 | } | |
2059 | ||
e20ee7c2 JD |
2060 | /* |
2061 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2062 | * |
2063 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2064 | */ |
2065 | int lttng_destroy_session(const char *session_name) | |
2066 | { | |
2067 | int ret; | |
3e3665b8 JG |
2068 | enum lttng_error_code ret_code; |
2069 | enum lttng_destruction_handle_status status; | |
2070 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2071 | |
2072 | /* | |
3e3665b8 JG |
2073 | * Stop the tracing and wait for the data to be |
2074 | * consumed. | |
e20ee7c2 JD |
2075 | */ |
2076 | ret = _lttng_stop_tracing(session_name, 1); | |
2077 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2078 | goto end; | |
2079 | } | |
2080 | ||
3e3665b8 JG |
2081 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2082 | if (ret_code != LTTNG_OK) { | |
2083 | ret = (int) -ret_code; | |
2084 | goto end; | |
2085 | } | |
a0377dfe | 2086 | LTTNG_ASSERT(handle); |
3e3665b8 JG |
2087 | |
2088 | /* Block until the completion of the destruction of the session. */ | |
2089 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2090 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2091 | ret = -LTTNG_ERR_UNK; | |
2092 | goto end; | |
2093 | } | |
2094 | ||
2095 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2096 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2097 | ret = -LTTNG_ERR_UNK; | |
2098 | goto end; | |
2099 | } | |
780d4bb8 | 2100 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2101 | end: |
3e3665b8 | 2102 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2103 | return ret; |
2104 | } | |
2105 | ||
2106 | /* | |
2107 | * Destroy the session without waiting for the data. | |
2108 | */ | |
2109 | int lttng_destroy_session_no_wait(const char *session_name) | |
2110 | { | |
3e3665b8 | 2111 | enum lttng_error_code ret_code; |
e20ee7c2 | 2112 | |
3e3665b8 | 2113 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
3204017e | 2114 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2115 | } |
2116 | ||
57167058 | 2117 | /* |
9ae110e2 JG |
2118 | * Ask the session daemon for all available sessions. |
2119 | * Sets the contents of the sessions array. | |
2120 | * Returns the number of lttng_session entries in sessions; | |
2121 | * on error, returns a negative value. | |
57167058 | 2122 | */ |
b178f53e | 2123 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2124 | { |
ca95a216 | 2125 | int ret; |
cd80958d | 2126 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2127 | const size_t session_size = sizeof(struct lttng_session) + |
2128 | sizeof(struct lttng_session_extended); | |
2129 | size_t session_count, i; | |
2130 | struct lttng_session_extended *sessions_extended_begin; | |
2131 | struct lttng_session *sessions = NULL; | |
57167058 | 2132 | |
53efb85a | 2133 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2134 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
985aea18 MD |
2135 | /* |
2136 | * Initialize out_sessions to NULL so it is initialized when | |
2137 | * lttng_list_sessions returns 0, thus allowing *out_sessions to | |
2138 | * be subsequently freed. | |
2139 | */ | |
2140 | *out_sessions = NULL; | |
b178f53e JG |
2141 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2142 | if (ret <= 0) { | |
b178f53e JG |
2143 | goto end; |
2144 | } | |
2145 | if (!sessions) { | |
2146 | ret = -LTTNG_ERR_FATAL; | |
2147 | goto end; | |
2148 | } | |
2149 | ||
2150 | if (ret % session_size) { | |
2151 | ret = -LTTNG_ERR_UNK; | |
2152 | free(sessions); | |
b178f53e | 2153 | goto end; |
57167058 | 2154 | } |
b178f53e JG |
2155 | session_count = (size_t) ret / session_size; |
2156 | sessions_extended_begin = (struct lttng_session_extended *) | |
2157 | (&sessions[session_count]); | |
57167058 | 2158 | |
b178f53e JG |
2159 | /* Set extended session info pointers. */ |
2160 | for (i = 0; i < session_count; i++) { | |
2161 | struct lttng_session *session = &sessions[i]; | |
2162 | struct lttng_session_extended *extended = | |
2163 | &(sessions_extended_begin[i]); | |
2164 | ||
2165 | session->extended.ptr = extended; | |
2166 | } | |
2167 | ||
2168 | ret = (int) session_count; | |
2169 | *out_sessions = sessions; | |
2170 | end: | |
2171 | return ret; | |
2172 | } | |
2173 | ||
2174 | enum lttng_error_code lttng_session_get_creation_time( | |
2175 | const struct lttng_session *session, uint64_t *creation_time) | |
2176 | { | |
2177 | enum lttng_error_code ret = LTTNG_OK; | |
2178 | struct lttng_session_extended *extended; | |
2179 | ||
2180 | if (!session || !creation_time || !session->extended.ptr) { | |
2181 | ret = LTTNG_ERR_INVALID; | |
2182 | goto end; | |
2183 | } | |
2184 | ||
4bd69c5f | 2185 | extended = (lttng_session_extended *) session->extended.ptr; |
b178f53e JG |
2186 | if (!extended->creation_time.is_set) { |
2187 | /* Not created on the session daemon yet. */ | |
2188 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2189 | goto end; | |
2190 | } | |
2191 | *creation_time = extended->creation_time.value; | |
2192 | end: | |
2193 | return ret; | |
57167058 DG |
2194 | } |
2195 | ||
d7ba1388 MD |
2196 | int lttng_set_session_shm_path(const char *session_name, |
2197 | const char *shm_path) | |
2198 | { | |
e1b624d0 | 2199 | int ret; |
d7ba1388 MD |
2200 | struct lttcomm_session_msg lsm; |
2201 | ||
2202 | if (session_name == NULL) { | |
2203 | return -LTTNG_ERR_INVALID; | |
2204 | } | |
2205 | ||
2206 | memset(&lsm, 0, sizeof(lsm)); | |
2207 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2208 | ||
e1b624d0 | 2209 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2210 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2211 | if (ret) { |
2212 | ret = -LTTNG_ERR_INVALID; | |
2213 | goto end; | |
2214 | } | |
2215 | ||
2216 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2217 | sizeof(lsm.u.set_shm_path.shm_path)); |
e1b624d0 JG |
2218 | if (ret) { |
2219 | ret = -LTTNG_ERR_INVALID; | |
2220 | goto end; | |
2221 | } | |
d7ba1388 | 2222 | |
e1b624d0 JG |
2223 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2224 | end: | |
2225 | return ret; | |
d7ba1388 MD |
2226 | } |
2227 | ||
9f19cc17 | 2228 | /* |
9ae110e2 JG |
2229 | * Ask the session daemon for all available domains of a session. |
2230 | * Sets the contents of the domains array. | |
2231 | * Returns the number of lttng_domain entries in domains; | |
2232 | * on error, returns a negative value. | |
9f19cc17 | 2233 | */ |
330be774 | 2234 | int lttng_list_domains(const char *session_name, |
cd80958d | 2235 | struct lttng_domain **domains) |
9f19cc17 DG |
2236 | { |
2237 | int ret; | |
cd80958d DG |
2238 | struct lttcomm_session_msg lsm; |
2239 | ||
330be774 | 2240 | if (session_name == NULL) { |
e1b624d0 JG |
2241 | ret = -LTTNG_ERR_INVALID; |
2242 | goto error; | |
cd80958d | 2243 | } |
9f19cc17 | 2244 | |
53efb85a | 2245 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2246 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2247 | ||
e1b624d0 | 2248 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2249 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2250 | if (ret) { |
2251 | ret = -LTTNG_ERR_INVALID; | |
2252 | goto error; | |
2253 | } | |
cd80958d | 2254 | |
cac3069d | 2255 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2256 | if (ret < 0) { |
e1b624d0 | 2257 | goto error; |
9f19cc17 DG |
2258 | } |
2259 | ||
2260 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2261 | error: |
2262 | return ret; | |
9f19cc17 DG |
2263 | } |
2264 | ||
2265 | /* | |
9ae110e2 JG |
2266 | * Ask the session daemon for all available channels of a session. |
2267 | * Sets the contents of the channels array. | |
2268 | * Returns the number of lttng_channel entries in channels; | |
2269 | * on error, returns a negative value. | |
9f19cc17 | 2270 | */ |
cd80958d DG |
2271 | int lttng_list_channels(struct lttng_handle *handle, |
2272 | struct lttng_channel **channels) | |
9f19cc17 DG |
2273 | { |
2274 | int ret; | |
53e367f9 JG |
2275 | size_t channel_count, i; |
2276 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2277 | sizeof(struct lttng_channel_extended); |
cd80958d | 2278 | struct lttcomm_session_msg lsm; |
4bd69c5f | 2279 | char *extended_at; |
cd80958d | 2280 | |
9d697d3d | 2281 | if (handle == NULL) { |
53e367f9 JG |
2282 | ret = -LTTNG_ERR_INVALID; |
2283 | goto end; | |
cd80958d DG |
2284 | } |
2285 | ||
53efb85a | 2286 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2287 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
e1b624d0 | 2288 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2289 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2290 | if (ret) { |
2291 | ret = -LTTNG_ERR_INVALID; | |
2292 | goto end; | |
2293 | } | |
9f19cc17 | 2294 | |
60160d2a | 2295 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2296 | |
cac3069d | 2297 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2298 | if (ret < 0) { |
53e367f9 JG |
2299 | goto end; |
2300 | } | |
2301 | ||
2302 | if (ret % channel_size) { | |
2303 | ret = -LTTNG_ERR_UNK; | |
2304 | free(*channels); | |
2305 | *channels = NULL; | |
2306 | goto end; | |
9f19cc17 | 2307 | } |
53e367f9 | 2308 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2309 | |
53e367f9 | 2310 | /* Set extended info pointers */ |
4bd69c5f | 2311 | extended_at = ((char *) *channels) + |
53e367f9 JG |
2312 | channel_count * sizeof(struct lttng_channel); |
2313 | for (i = 0; i < channel_count; i++) { | |
2314 | struct lttng_channel *chan = &(*channels)[i]; | |
2315 | ||
2316 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2317 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2318 | } |
2319 | ||
2320 | ret = (int) channel_count; | |
2321 | end: | |
2322 | return ret; | |
9f19cc17 DG |
2323 | } |
2324 | ||
2325 | /* | |
9ae110e2 JG |
2326 | * Ask the session daemon for all available events of a session channel. |
2327 | * Sets the contents of the events array. | |
2328 | * Returns the number of lttng_event entries in events; | |
2329 | * on error, returns a negative value. | |
9f19cc17 | 2330 | */ |
cd80958d DG |
2331 | int lttng_list_events(struct lttng_handle *handle, |
2332 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2333 | { |
2334 | int ret; | |
e368fb43 JG |
2335 | struct lttcomm_session_msg lsm = {}; |
2336 | const struct lttcomm_event_command_header *cmd_header = NULL; | |
b4e3ceb9 | 2337 | uint32_t nb_events, i; |
4bd69c5f | 2338 | const char *comm_ext_at; |
56f0bc67 | 2339 | struct lttng_dynamic_buffer listing; |
de453daa | 2340 | size_t storage_req; |
e368fb43 JG |
2341 | struct lttng_payload payload; |
2342 | struct lttng_payload payload_copy; | |
2343 | struct lttng_payload_view lsm_view = | |
2344 | lttng_payload_view_init_from_buffer( | |
2345 | (const char *) &lsm, 0, sizeof(lsm)); | |
2346 | struct lttng_buffer_view cmd_header_view; | |
2347 | struct lttng_buffer_view cmd_payload_view; | |
2348 | struct lttng_buffer_view flat_events_view; | |
2349 | struct lttng_buffer_view ext_view; | |
9f19cc17 | 2350 | |
9d697d3d DG |
2351 | /* Safety check. An handle and channel name are mandatory */ |
2352 | if (handle == NULL || channel_name == NULL) { | |
e368fb43 JG |
2353 | ret = -LTTNG_ERR_INVALID; |
2354 | goto end; | |
cd80958d DG |
2355 | } |
2356 | ||
e368fb43 JG |
2357 | lttng_payload_init(&payload); |
2358 | lttng_payload_init(&payload_copy); | |
2359 | ||
cd80958d | 2360 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
e1b624d0 | 2361 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2362 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2363 | if (ret) { |
2364 | ret = -LTTNG_ERR_INVALID; | |
2365 | goto end; | |
2366 | } | |
2367 | ||
2368 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2369 | sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2370 | if (ret) { |
2371 | ret = -LTTNG_ERR_INVALID; | |
2372 | goto end; | |
2373 | } | |
2374 | ||
60160d2a | 2375 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2376 | |
e368fb43 | 2377 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &payload); |
9f19cc17 | 2378 | if (ret < 0) { |
de453daa | 2379 | goto end; |
9f19cc17 DG |
2380 | } |
2381 | ||
e368fb43 JG |
2382 | /* |
2383 | * A copy of the payload is performed since it will be | |
2384 | * consumed twice. Consuming the same payload twice is invalid since | |
2385 | * it will cause any received file descriptor to become "shared" | |
2386 | * between different instances of the resulting objects. | |
2387 | */ | |
2388 | ret = lttng_payload_copy(&payload, &payload_copy); | |
2389 | if (ret) { | |
2390 | ret = -LTTNG_ERR_NOMEM; | |
2391 | goto end; | |
2392 | } | |
2393 | ||
2394 | cmd_header_view = lttng_buffer_view_from_dynamic_buffer( | |
2395 | &payload.buffer, 0, sizeof(*cmd_header)); | |
3e6e0df2 | 2396 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { |
e368fb43 | 2397 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
d9f484bc JG |
2398 | goto end; |
2399 | } | |
2400 | ||
e368fb43 JG |
2401 | cmd_header = (typeof(cmd_header)) cmd_header_view.data; |
2402 | ||
b4e3ceb9 PP |
2403 | /* Set number of events and free command header */ |
2404 | nb_events = cmd_header->nb_events; | |
2405 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2406 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2407 | goto end; |
b4e3ceb9 | 2408 | } |
e368fb43 JG |
2409 | |
2410 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( | |
2411 | &payload.buffer, sizeof(*cmd_header), -1); | |
b4e3ceb9 | 2412 | |
de453daa JG |
2413 | /* |
2414 | * The buffer that is returned must contain a "flat" version of | |
2415 | * the events that are returned. In other words, all pointers | |
2416 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2417 | * buffer so that the user may free everything by simply calling free() |
2418 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2419 | * compatibility. |
2420 | * | |
56f0bc67 JG |
2421 | * A first pass is performed to compute the size of the buffer that |
2422 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2423 | * the returned events so that their members always point within the |
2424 | * buffer. | |
2425 | * | |
2426 | * The layout of the returned buffer is as follows: | |
2427 | * - struct lttng_event[nb_events], | |
2428 | * - nb_events times the following: | |
2429 | * - struct lttng_event_extended, | |
2430 | * - flattened version of userspace_probe_location | |
2431 | * - filter_expression | |
2432 | * - exclusions | |
2433 | * - padding to align to 64-bits | |
2434 | */ | |
e368fb43 JG |
2435 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2436 | nb_events * sizeof(struct lttng_event), -1); | |
2437 | comm_ext_at = ext_view.data; | |
de453daa | 2438 | storage_req = nb_events * sizeof(struct lttng_event); |
e368fb43 JG |
2439 | { |
2440 | struct lttng_payload_view payload_view = | |
2441 | lttng_payload_view_from_payload(&payload, 0, -1); | |
b4e3ceb9 | 2442 | |
e368fb43 JG |
2443 | for (i = 0; i < nb_events; i++) { |
2444 | const struct lttcomm_event_extended_header *ext_comm = | |
2445 | (struct lttcomm_event_extended_header *) | |
2446 | comm_ext_at; | |
2447 | int probe_storage_req = 0; | |
b4e3ceb9 | 2448 | |
e368fb43 JG |
2449 | comm_ext_at += sizeof(*ext_comm); |
2450 | comm_ext_at += ext_comm->filter_len; | |
2451 | comm_ext_at += ext_comm->nb_exclusions * | |
2452 | LTTNG_SYMBOL_NAME_LEN; | |
2453 | ||
2454 | if (ext_comm->userspace_probe_location_len) { | |
2455 | struct lttng_userspace_probe_location | |
2456 | *probe_location = NULL; | |
2457 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2458 | &payload_view, | |
2459 | (const char *) comm_ext_at - | |
2460 | payload_view.buffer.data, | |
2461 | ext_comm->userspace_probe_location_len); | |
56f0bc67 | 2462 | |
3e6e0df2 JG |
2463 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2464 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2465 | goto end; | |
2466 | } | |
2467 | ||
e368fb43 JG |
2468 | /* |
2469 | * Create a temporary userspace probe location | |
2470 | * to determine the size needed by a "flattened" | |
2471 | * version of that same probe location. | |
2472 | */ | |
2473 | ret = lttng_userspace_probe_location_create_from_payload( | |
2474 | &probe_location_view, | |
2475 | &probe_location); | |
2476 | if (ret < 0) { | |
2477 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2478 | goto end; | |
2479 | } | |
56f0bc67 | 2480 | |
e368fb43 JG |
2481 | ret = lttng_userspace_probe_location_flatten( |
2482 | probe_location, NULL); | |
2483 | lttng_userspace_probe_location_destroy( | |
2484 | probe_location); | |
2485 | if (ret < 0) { | |
2486 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2487 | goto end; | |
2488 | } | |
56f0bc67 | 2489 | |
e368fb43 JG |
2490 | probe_storage_req = ret; |
2491 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2492 | } |
2493 | ||
e368fb43 JG |
2494 | storage_req += sizeof(struct lttng_event_extended); |
2495 | storage_req += ext_comm->filter_len; | |
2496 | storage_req += ext_comm->nb_exclusions * | |
2497 | LTTNG_SYMBOL_NAME_LEN; | |
2498 | /* Padding to ensure the flat probe is aligned. */ | |
1cbd136b | 2499 | storage_req = lttng_align_ceil(storage_req, sizeof(uint64_t)); |
e368fb43 | 2500 | storage_req += probe_storage_req; |
56f0bc67 | 2501 | } |
b4e3ceb9 PP |
2502 | } |
2503 | ||
56f0bc67 JG |
2504 | lttng_dynamic_buffer_init(&listing); |
2505 | /* | |
2506 | * We must ensure that "listing" is never resized so as to preserve | |
2507 | * the validity of the flattened objects. | |
2508 | */ | |
2509 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2510 | if (ret) { | |
2511 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2512 | goto end; |
2513 | } | |
56f0bc67 | 2514 | |
e368fb43 JG |
2515 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( |
2516 | &payload_copy.buffer, sizeof(*cmd_header), -1); | |
2517 | flat_events_view = lttng_buffer_view_from_view(&cmd_payload_view, 0, | |
56f0bc67 | 2518 | nb_events * sizeof(struct lttng_event)); |
e368fb43 | 2519 | ret = lttng_dynamic_buffer_append_view(&listing, &flat_events_view); |
56f0bc67 JG |
2520 | if (ret) { |
2521 | ret = -LTTNG_ERR_NOMEM; | |
2522 | goto free_dynamic_buffer; | |
2523 | } | |
de453daa | 2524 | |
e368fb43 JG |
2525 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2526 | nb_events * sizeof(struct lttng_event), -1); | |
2527 | comm_ext_at = ext_view.data; | |
2528 | ||
2529 | { | |
2530 | struct lttng_payload_view payload_copy_view = | |
2531 | lttng_payload_view_from_payload( | |
2532 | &payload_copy, 0, -1); | |
2533 | ||
2534 | for (i = 0; i < nb_events; i++) { | |
2535 | struct lttng_event *event = (typeof(event))( | |
2536 | listing.data + | |
2537 | (sizeof(struct lttng_event) * i)); | |
2538 | const struct lttcomm_event_extended_header *ext_comm = | |
2539 | (typeof(ext_comm)) comm_ext_at; | |
2540 | struct lttng_event_extended *event_extended = | |
2541 | (typeof(event_extended))(listing.data + | |
2542 | listing.size); | |
2543 | ||
2544 | /* Insert struct lttng_event_extended. */ | |
2545 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2546 | listing.size + sizeof(*event_extended)); | |
56f0bc67 JG |
2547 | if (ret) { |
2548 | ret = -LTTNG_ERR_NOMEM; | |
2549 | goto free_dynamic_buffer; | |
2550 | } | |
e368fb43 JG |
2551 | event->extended.ptr = event_extended; |
2552 | ||
2553 | comm_ext_at += sizeof(*ext_comm); | |
2554 | ||
2555 | /* Insert filter expression. */ | |
2556 | if (ext_comm->filter_len) { | |
2557 | event_extended->filter_expression = | |
2558 | listing.data + listing.size; | |
2559 | ret = lttng_dynamic_buffer_append(&listing, | |
2560 | comm_ext_at, | |
2561 | ext_comm->filter_len); | |
2562 | if (ret) { | |
2563 | ret = -LTTNG_ERR_NOMEM; | |
2564 | goto free_dynamic_buffer; | |
2565 | } | |
2566 | comm_ext_at += ext_comm->filter_len; | |
2567 | } | |
56f0bc67 | 2568 | |
e368fb43 JG |
2569 | /* Insert exclusions. */ |
2570 | if (ext_comm->nb_exclusions) { | |
2571 | event_extended->exclusions.count = | |
2572 | ext_comm->nb_exclusions; | |
2573 | event_extended->exclusions.strings = | |
2574 | listing.data + listing.size; | |
2575 | ||
2576 | ret = lttng_dynamic_buffer_append(&listing, | |
2577 | comm_ext_at, | |
2578 | ext_comm->nb_exclusions * | |
2579 | LTTNG_SYMBOL_NAME_LEN); | |
2580 | if (ret) { | |
2581 | ret = -LTTNG_ERR_NOMEM; | |
2582 | goto free_dynamic_buffer; | |
2583 | } | |
2584 | comm_ext_at += ext_comm->nb_exclusions * | |
2585 | LTTNG_SYMBOL_NAME_LEN; | |
2586 | } | |
56f0bc67 | 2587 | |
e368fb43 JG |
2588 | /* Insert padding to align to 64-bits. */ |
2589 | ret = lttng_dynamic_buffer_set_size(&listing, | |
1cbd136b | 2590 | lttng_align_ceil(listing.size, |
e368fb43 | 2591 | sizeof(uint64_t))); |
56f0bc67 JG |
2592 | if (ret) { |
2593 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2594 | goto free_dynamic_buffer; |
56f0bc67 | 2595 | } |
56f0bc67 | 2596 | |
e368fb43 JG |
2597 | /* Insert flattened userspace probe location. */ |
2598 | if (ext_comm->userspace_probe_location_len) { | |
2599 | struct lttng_userspace_probe_location | |
2600 | *probe_location = NULL; | |
2601 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2602 | &payload_copy_view, | |
2603 | (const char *) comm_ext_at - | |
2604 | payload_copy_view.buffer.data, | |
2605 | ext_comm->userspace_probe_location_len); | |
2606 | ||
3e6e0df2 JG |
2607 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2608 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2609 | goto free_dynamic_buffer; | |
2610 | } | |
2611 | ||
e368fb43 JG |
2612 | ret = lttng_userspace_probe_location_create_from_payload( |
2613 | &probe_location_view, | |
2614 | &probe_location); | |
2615 | if (ret < 0) { | |
2616 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2617 | goto free_dynamic_buffer; | |
2618 | } | |
de453daa | 2619 | |
e368fb43 JG |
2620 | event_extended->probe_location = (struct lttng_userspace_probe_location |
2621 | *) (listing.data + | |
2622 | listing.size); | |
2623 | ret = lttng_userspace_probe_location_flatten( | |
2624 | probe_location, &listing); | |
2625 | lttng_userspace_probe_location_destroy( | |
2626 | probe_location); | |
2627 | if (ret < 0) { | |
2628 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2629 | goto free_dynamic_buffer; | |
2630 | } | |
56f0bc67 | 2631 | |
e368fb43 | 2632 | comm_ext_at += ext_comm->userspace_probe_location_len; |
56f0bc67 | 2633 | } |
56f0bc67 | 2634 | } |
de453daa JG |
2635 | } |
2636 | ||
56f0bc67 JG |
2637 | /* Don't reset listing buffer as we return its content. */ |
2638 | *events = (struct lttng_event *) listing.data; | |
2639 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2640 | ret = (int) nb_events; |
56f0bc67 JG |
2641 | free_dynamic_buffer: |
2642 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2643 | end: |
e368fb43 JG |
2644 | lttng_payload_reset(&payload); |
2645 | lttng_payload_reset(&payload_copy); | |
b4e3ceb9 | 2646 | return ret; |
9f19cc17 DG |
2647 | } |
2648 | ||
fac6795d | 2649 | /* |
1c8d13c8 TD |
2650 | * Sets the tracing_group variable with name. |
2651 | * This function allocates memory pointed to by tracing_group. | |
2652 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2653 | */ |
2654 | int lttng_set_tracing_group(const char *name) | |
2655 | { | |
e32a3d0f | 2656 | int ret = 0; |
76da29b6 | 2657 | char *new_group; |
e32a3d0f | 2658 | |
9d697d3d | 2659 | if (name == NULL) { |
e32a3d0f JG |
2660 | ret = -LTTNG_ERR_INVALID; |
2661 | goto end; | |
9d697d3d DG |
2662 | } |
2663 | ||
e32a3d0f JG |
2664 | new_group = strdup(name); |
2665 | if (!new_group) { | |
2666 | ret = -LTTNG_ERR_FATAL; | |
2667 | goto end; | |
fac6795d DG |
2668 | } |
2669 | ||
76da29b6 JR |
2670 | free(tracing_group); |
2671 | tracing_group = new_group; | |
2672 | new_group = NULL; | |
2673 | ||
e32a3d0f JG |
2674 | end: |
2675 | return ret; | |
fac6795d DG |
2676 | } |
2677 | ||
cd80958d | 2678 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2679 | struct lttng_calibrate *calibrate) |
2680 | { | |
b812e5ca PP |
2681 | /* |
2682 | * This command was removed in LTTng 2.9. | |
2683 | */ | |
2684 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2685 | } |
2686 | ||
5edd7e09 DG |
2687 | /* |
2688 | * Set default channel attributes. | |
441c16a7 | 2689 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2690 | */ |
2691 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2692 | struct lttng_channel_attr *attr) | |
2693 | { | |
294851b0 | 2694 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2695 | |
5edd7e09 DG |
2696 | /* Safety check */ |
2697 | if (attr == NULL || domain == NULL) { | |
2698 | return; | |
2699 | } | |
2700 | ||
294851b0 | 2701 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2702 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2703 | ||
0a9c6494 DG |
2704 | /* Same for all domains. */ |
2705 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2706 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2707 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2708 | ||
5edd7e09 DG |
2709 | switch (domain->type) { |
2710 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2711 | attr->switch_timer_interval = |
2712 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2713 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2714 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2715 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2716 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2717 | if (extended) { |
2718 | extended->monitor_timer_interval = | |
2719 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2720 | extended->blocking_timeout = |
2721 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2722 | } |
5edd7e09 DG |
2723 | break; |
2724 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2725 | switch (domain->buf_type) { |
2726 | case LTTNG_BUFFER_PER_UID: | |
2727 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2728 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2729 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2730 | attr->switch_timer_interval = |
2731 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2732 | attr->read_timer_interval = | |
2733 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2734 | if (extended) { |
2735 | extended->monitor_timer_interval = | |
2736 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2737 | extended->blocking_timeout = |
2738 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2739 | } |
0a9c6494 DG |
2740 | break; |
2741 | case LTTNG_BUFFER_PER_PID: | |
2742 | default: | |
2743 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2744 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2745 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2746 | attr->switch_timer_interval = |
2747 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2748 | attr->read_timer_interval = | |
2749 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2750 | if (extended) { |
2751 | extended->monitor_timer_interval = | |
2752 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2753 | extended->blocking_timeout = |
2754 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2755 | } |
0a9c6494 DG |
2756 | break; |
2757 | } | |
5edd7e09 | 2758 | default: |
441c16a7 | 2759 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2760 | break; |
2761 | } | |
cf0bcb51 JG |
2762 | |
2763 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2764 | } |
2765 | ||
5ba3702f JG |
2766 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2767 | uint64_t *discarded_events) | |
2768 | { | |
2769 | int ret = 0; | |
cf0bcb51 | 2770 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2771 | |
2772 | if (!channel || !discarded_events) { | |
2773 | ret = -LTTNG_ERR_INVALID; | |
2774 | goto end; | |
2775 | } | |
2776 | ||
4bd69c5f | 2777 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2778 | if (!chan_ext) { |
2779 | /* | |
2780 | * This can happen since the lttng_channel structure is | |
2781 | * used for other tasks where this pointer is never set. | |
2782 | */ | |
2783 | *discarded_events = 0; | |
2784 | goto end; | |
2785 | } | |
2786 | ||
2787 | *discarded_events = chan_ext->discarded_events; | |
2788 | end: | |
2789 | return ret; | |
2790 | } | |
2791 | ||
2792 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2793 | uint64_t *lost_packets) | |
2794 | { | |
2795 | int ret = 0; | |
cf0bcb51 | 2796 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2797 | |
2798 | if (!channel || !lost_packets) { | |
2799 | ret = -LTTNG_ERR_INVALID; | |
2800 | goto end; | |
2801 | } | |
2802 | ||
4bd69c5f | 2803 | chan_ext = (lttng_channel_extended *) channel->attr.extended.ptr; |
5ba3702f JG |
2804 | if (!chan_ext) { |
2805 | /* | |
2806 | * This can happen since the lttng_channel structure is | |
2807 | * used for other tasks where this pointer is never set. | |
2808 | */ | |
2809 | *lost_packets = 0; | |
2810 | goto end; | |
2811 | } | |
2812 | ||
2813 | *lost_packets = chan_ext->lost_packets; | |
2814 | end: | |
2815 | return ret; | |
2816 | } | |
2817 | ||
cf0bcb51 JG |
2818 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2819 | uint64_t *monitor_timer_interval) | |
2820 | { | |
2821 | int ret = 0; | |
2822 | ||
2823 | if (!chan || !monitor_timer_interval) { | |
2824 | ret = -LTTNG_ERR_INVALID; | |
2825 | goto end; | |
2826 | } | |
2827 | ||
2828 | if (!chan->attr.extended.ptr) { | |
2829 | ret = -LTTNG_ERR_INVALID; | |
2830 | goto end; | |
2831 | } | |
2832 | ||
2833 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2834 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2835 | end: | |
2836 | return ret; | |
2837 | } | |
2838 | ||
2839 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2840 | uint64_t monitor_timer_interval) | |
2841 | { | |
2842 | int ret = 0; | |
2843 | ||
2844 | if (!chan || !chan->attr.extended.ptr) { | |
2845 | ret = -LTTNG_ERR_INVALID; | |
2846 | goto end; | |
2847 | } | |
2848 | ||
2849 | ((struct lttng_channel_extended *) | |
2850 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2851 | monitor_timer_interval; | |
2852 | end: | |
2853 | return ret; | |
2854 | } | |
2855 | ||
491d1539 MD |
2856 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2857 | int64_t *blocking_timeout) | |
2858 | { | |
2859 | int ret = 0; | |
2860 | ||
2861 | if (!chan || !blocking_timeout) { | |
2862 | ret = -LTTNG_ERR_INVALID; | |
2863 | goto end; | |
2864 | } | |
2865 | ||
2866 | if (!chan->attr.extended.ptr) { | |
2867 | ret = -LTTNG_ERR_INVALID; | |
2868 | goto end; | |
2869 | } | |
2870 | ||
2871 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2872 | chan->attr.extended.ptr)->blocking_timeout; | |
2873 | end: | |
2874 | return ret; | |
2875 | } | |
2876 | ||
2877 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2878 | int64_t blocking_timeout) | |
2879 | { | |
2880 | int ret = 0; | |
2881 | int64_t msec_timeout; | |
2882 | ||
2883 | if (!chan || !chan->attr.extended.ptr) { | |
2884 | ret = -LTTNG_ERR_INVALID; | |
2885 | goto end; | |
2886 | } | |
2887 | ||
2888 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2889 | ret = -LTTNG_ERR_INVALID; | |
2890 | goto end; | |
2891 | } | |
2892 | ||
2893 | /* | |
2894 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2895 | * us to accept a narrower range of values (msecs expressed as a signed | |
2896 | * 32-bit integer). | |
2897 | */ | |
2898 | msec_timeout = blocking_timeout / 1000; | |
2899 | if (msec_timeout != (int32_t) msec_timeout) { | |
2900 | ret = -LTTNG_ERR_INVALID; | |
2901 | goto end; | |
2902 | } | |
2903 | ||
2904 | ((struct lttng_channel_extended *) | |
2905 | chan->attr.extended.ptr)->blocking_timeout = | |
2906 | blocking_timeout; | |
2907 | end: | |
2908 | return ret; | |
2909 | } | |
2910 | ||
fac6795d | 2911 | /* |
2269e89e | 2912 | * Check if session daemon is alive. |
fac6795d | 2913 | * |
2269e89e | 2914 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2915 | * On error returns a negative value. |
fac6795d | 2916 | */ |
947308c4 | 2917 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2918 | { |
2919 | int ret; | |
2920 | ||
2921 | ret = set_session_daemon_path(); | |
2922 | if (ret < 0) { | |
9ae110e2 | 2923 | /* Error. */ |
fac6795d DG |
2924 | return ret; |
2925 | } | |
2926 | ||
9d035200 | 2927 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2928 | /* |
9ae110e2 JG |
2929 | * No socket path set. Weird error which means the constructor |
2930 | * was not called. | |
2f70b271 | 2931 | */ |
a0377dfe | 2932 | abort(); |
fac6795d DG |
2933 | } |
2934 | ||
2269e89e | 2935 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2936 | if (ret < 0) { |
9ae110e2 | 2937 | /* Not alive. */ |
7d8234d9 MD |
2938 | return 0; |
2939 | } | |
7d8234d9 | 2940 | |
9ae110e2 | 2941 | /* Is alive. */ |
947308c4 | 2942 | return 1; |
fac6795d DG |
2943 | } |
2944 | ||
00e2e675 | 2945 | /* |
a4b92340 | 2946 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2947 | * |
2948 | * Return 0 on success, else a negative value. | |
2949 | */ | |
a4b92340 DG |
2950 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2951 | const char *control_url, const char *data_url) | |
00e2e675 | 2952 | { |
3dd05a85 | 2953 | int ret; |
a4b92340 | 2954 | ssize_t size; |
00e2e675 | 2955 | struct lttcomm_session_msg lsm; |
a4b92340 | 2956 | struct lttng_uri *uris = NULL; |
00e2e675 | 2957 | |
a4b92340 | 2958 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
e1b624d0 JG |
2959 | ret = -LTTNG_ERR_INVALID; |
2960 | goto error; | |
00e2e675 DG |
2961 | } |
2962 | ||
a4b92340 DG |
2963 | memset(&lsm, 0, sizeof(lsm)); |
2964 | ||
00e2e675 DG |
2965 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2966 | ||
e1b624d0 | 2967 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 2968 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2969 | if (ret) { |
2970 | ret = -LTTNG_ERR_INVALID; | |
2971 | goto error; | |
2972 | } | |
2973 | ||
60160d2a | 2974 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2975 | |
bc894455 | 2976 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2977 | if (size < 0) { |
e1b624d0 JG |
2978 | ret = -LTTNG_ERR_INVALID; |
2979 | goto error; | |
a4b92340 DG |
2980 | } |
2981 | ||
2982 | lsm.u.uri.size = size; | |
00e2e675 | 2983 | |
795a978d | 2984 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2985 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2986 | |
2987 | free(uris); | |
e1b624d0 | 2988 | error: |
3dd05a85 | 2989 | return ret; |
00e2e675 DG |
2990 | } |
2991 | ||
2992 | /* | |
9c6bda17 | 2993 | * [OBSOLETE] |
00e2e675 | 2994 | */ |
4bd69c5f SM |
2995 | extern "C" |
2996 | LTTNG_EXPORT int lttng_enable_consumer(struct lttng_handle *handle); | |
00e2e675 DG |
2997 | int lttng_enable_consumer(struct lttng_handle *handle) |
2998 | { | |
785d2d0d | 2999 | return -ENOSYS; |
00e2e675 DG |
3000 | } |
3001 | ||
3002 | /* | |
9c6bda17 | 3003 | * [OBSOLETE] |
00e2e675 | 3004 | */ |
4bd69c5f SM |
3005 | extern "C" |
3006 | LTTNG_EXPORT int lttng_disable_consumer(struct lttng_handle *handle); | |
00e2e675 DG |
3007 | int lttng_disable_consumer(struct lttng_handle *handle) |
3008 | { | |
785d2d0d | 3009 | return -ENOSYS; |
00e2e675 DG |
3010 | } |
3011 | ||
07424f16 | 3012 | /* |
b178f53e | 3013 | * [OBSOLETE] |
07424f16 | 3014 | */ |
4bd69c5f SM |
3015 | extern "C" |
3016 | LTTNG_EXPORT int _lttng_create_session_ext(const char *name, const char *url, | |
2ec40111 | 3017 | const char *datetime); |
07424f16 DG |
3018 | int _lttng_create_session_ext(const char *name, const char *url, |
3019 | const char *datetime) | |
3020 | { | |
b178f53e | 3021 | return -ENOSYS; |
07424f16 DG |
3022 | } |
3023 | ||
806e2684 DG |
3024 | /* |
3025 | * For a given session name, this call checks if the data is ready to be read | |
3026 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
3027 | * any readers. | |
3028 | */ | |
6d805429 | 3029 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
3030 | { |
3031 | int ret; | |
3032 | struct lttcomm_session_msg lsm; | |
f6151c55 | 3033 | uint8_t *pending = NULL; |
806e2684 DG |
3034 | |
3035 | if (session_name == NULL) { | |
3036 | return -LTTNG_ERR_INVALID; | |
3037 | } | |
3038 | ||
53efb85a | 3039 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 3040 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 3041 | |
e1b624d0 | 3042 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 3043 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3044 | if (ret) { |
3045 | ret = -LTTNG_ERR_INVALID; | |
3046 | goto end; | |
3047 | } | |
806e2684 | 3048 | |
f6151c55 JG |
3049 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
3050 | if (ret < 0) { | |
3051 | goto end; | |
3052 | } else if (ret != 1) { | |
3053 | /* Unexpected payload size */ | |
3054 | ret = -LTTNG_ERR_INVALID; | |
3055 | goto end; | |
e848d36d JG |
3056 | } else if (!pending) { |
3057 | /* Internal error. */ | |
3058 | ret = -LTTNG_ERR_UNK; | |
3059 | goto end; | |
806e2684 DG |
3060 | } |
3061 | ||
f6151c55 JG |
3062 | ret = (int) *pending; |
3063 | end: | |
3064 | free(pending); | |
806e2684 DG |
3065 | return ret; |
3066 | } | |
3067 | ||
93ec662e JD |
3068 | /* |
3069 | * Regenerate the metadata for a session. | |
3070 | * Return 0 on success, a negative error code on error. | |
3071 | */ | |
eded6438 | 3072 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
3073 | { |
3074 | int ret; | |
3075 | struct lttcomm_session_msg lsm; | |
3076 | ||
3077 | if (!session_name) { | |
3078 | ret = -LTTNG_ERR_INVALID; | |
3079 | goto end; | |
3080 | } | |
3081 | ||
3082 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 3083 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 3084 | |
e1b624d0 | 3085 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 3086 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3087 | if (ret) { |
3088 | ret = -LTTNG_ERR_INVALID; | |
3089 | goto end; | |
3090 | } | |
93ec662e JD |
3091 | |
3092 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3093 | if (ret < 0) { | |
3094 | goto end; | |
3095 | } | |
3096 | ||
3097 | ret = 0; | |
3098 | end: | |
3099 | return ret; | |
3100 | } | |
3101 | ||
eded6438 JD |
3102 | /* |
3103 | * Deprecated, replaced by lttng_regenerate_metadata. | |
3104 | */ | |
3105 | int lttng_metadata_regenerate(const char *session_name) | |
3106 | { | |
3107 | return lttng_regenerate_metadata(session_name); | |
3108 | } | |
3109 | ||
c2561365 JD |
3110 | /* |
3111 | * Regenerate the statedump of a session. | |
3112 | * Return 0 on success, a negative error code on error. | |
3113 | */ | |
3114 | int lttng_regenerate_statedump(const char *session_name) | |
3115 | { | |
3116 | int ret; | |
3117 | struct lttcomm_session_msg lsm; | |
3118 | ||
3119 | if (!session_name) { | |
3120 | ret = -LTTNG_ERR_INVALID; | |
3121 | goto end; | |
3122 | } | |
3123 | ||
3124 | memset(&lsm, 0, sizeof(lsm)); | |
3125 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
3126 | ||
e1b624d0 | 3127 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 3128 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3129 | if (ret) { |
3130 | ret = -LTTNG_ERR_INVALID; | |
3131 | goto end; | |
3132 | } | |
c2561365 JD |
3133 | |
3134 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3135 | if (ret < 0) { | |
3136 | goto end; | |
3137 | } | |
3138 | ||
3139 | ret = 0; | |
3140 | end: | |
3141 | return ret; | |
3142 | } | |
3143 | ||
a5c2d2a7 JG |
3144 | static |
3145 | int _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, | |
3146 | bool generate_name) | |
a58c490f JG |
3147 | { |
3148 | int ret; | |
99608320 JR |
3149 | struct lttcomm_session_msg lsm = { |
3150 | .cmd_type = LTTNG_REGISTER_TRIGGER, | |
3151 | }; | |
4bd69c5f | 3152 | lsm.u.trigger.is_trigger_anonymous = !name && !generate_name; |
99608320 JR |
3153 | struct lttcomm_session_msg *message_lsm; |
3154 | struct lttng_payload message; | |
3155 | struct lttng_payload reply; | |
242388e4 | 3156 | struct lttng_trigger *reply_trigger = NULL; |
9124c630 | 3157 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
3158 | const struct lttng_credentials user_creds = { |
3159 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3160 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3161 | }; | |
a5c2d2a7 JG |
3162 | const char *unused_trigger_name = NULL; |
3163 | enum lttng_trigger_status trigger_status; | |
99608320 JR |
3164 | |
3165 | lttng_payload_init(&message); | |
3166 | lttng_payload_init(&reply); | |
a58c490f JG |
3167 | |
3168 | if (!trigger) { | |
3169 | ret = -LTTNG_ERR_INVALID; | |
3170 | goto end; | |
3171 | } | |
3172 | ||
a5c2d2a7 JG |
3173 | trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); |
3174 | if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { | |
3175 | /* Re-using already registered trigger. */ | |
3176 | ret = -LTTNG_ERR_INVALID; | |
3177 | goto end; | |
3178 | } | |
3179 | ||
3180 | if (name) { | |
3181 | trigger_status = lttng_trigger_set_name(trigger, name); | |
3182 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3183 | ret = -LTTNG_ERR_NOMEM; | |
3184 | goto end; | |
3185 | } | |
3186 | } | |
3187 | ||
64eafdf6 JR |
3188 | if (!trigger->creds.uid.is_set) { |
3189 | /* Use the client's credentials as the trigger credentials. */ | |
3190 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3191 | } else { | |
3192 | /* | |
3193 | * Validate that either the current trigger credentials and the | |
3194 | * client credentials are identical or that the current user is | |
3195 | * root. The root user can register, unregister triggers for | |
3196 | * himself and other users. | |
3197 | * | |
3198 | * This check is also present on the sessiond side, using the | |
3199 | * credentials passed on the socket. These check are all | |
3200 | * "safety" checks. | |
3201 | */ | |
3202 | const struct lttng_credentials *trigger_creds = | |
3203 | lttng_trigger_get_credentials(trigger); | |
3204 | ||
3205 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3206 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3207 | ret = -LTTNG_ERR_EPERM; | |
a5c2d2a7 | 3208 | goto end_unset_name; |
64eafdf6 JR |
3209 | } |
3210 | } | |
3211 | } | |
3212 | ||
a58c490f | 3213 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3214 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a5c2d2a7 | 3215 | goto end_unset_name; |
a58c490f JG |
3216 | } |
3217 | ||
9124c630 JR |
3218 | domain_type = lttng_trigger_get_underlying_domain_type_restriction( |
3219 | trigger); | |
3220 | ||
3221 | lsm.domain.type = domain_type; | |
3222 | ||
97285430 JG |
3223 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3224 | if (ret) { | |
3225 | ret = -LTTNG_ERR_NOMEM; | |
a5c2d2a7 | 3226 | goto end_unset_name; |
97285430 | 3227 | } |
99608320 | 3228 | |
99608320 | 3229 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3230 | if (ret < 0) { |
a58c490f | 3231 | ret = -LTTNG_ERR_UNK; |
a5c2d2a7 | 3232 | goto end_unset_name; |
a58c490f JG |
3233 | } |
3234 | ||
b22f4f54 JG |
3235 | /* |
3236 | * This is needed to populate the trigger object size for the command | |
3237 | * header. | |
3238 | */ | |
3239 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3240 | ||
99608320 JR |
3241 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3242 | ||
3243 | { | |
3244 | struct lttng_payload_view message_view = | |
3245 | lttng_payload_view_from_payload( | |
3246 | &message, 0, -1); | |
3247 | ||
3248 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3249 | &message_view); | |
3250 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3251 | if (ret < 0) { | |
a5c2d2a7 | 3252 | goto end_unset_name; |
99608320 JR |
3253 | } |
3254 | } | |
3255 | ||
242388e4 JR |
3256 | { |
3257 | struct lttng_payload_view reply_view = | |
3258 | lttng_payload_view_from_payload( | |
3259 | &reply, 0, reply.buffer.size); | |
3260 | ||
3261 | ret = lttng_trigger_create_from_payload( | |
3262 | &reply_view, &reply_trigger); | |
3263 | if (ret < 0) { | |
a5c2d2a7 JG |
3264 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
3265 | goto end_unset_name; | |
242388e4 JR |
3266 | } |
3267 | } | |
3268 | ||
a5c2d2a7 JG |
3269 | if (name || generate_name) { |
3270 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3271 | if (ret < 0) { | |
3272 | ret = -LTTNG_ERR_NOMEM; | |
3273 | goto end; | |
3274 | } | |
242388e4 JR |
3275 | } |
3276 | ||
99608320 | 3277 | ret = 0; |
a5c2d2a7 JG |
3278 | goto end; |
3279 | ||
3280 | end_unset_name: | |
3281 | trigger_status = lttng_trigger_set_name(trigger, NULL); | |
3282 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
3283 | ret = -LTTNG_ERR_UNK; | |
3284 | } | |
a58c490f | 3285 | end: |
99608320 JR |
3286 | lttng_payload_reset(&message); |
3287 | lttng_payload_reset(&reply); | |
242388e4 | 3288 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3289 | return ret; |
3290 | } | |
3291 | ||
a5c2d2a7 JG |
3292 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3293 | { | |
3294 | /* Register an anonymous trigger. */ | |
3295 | return _lttng_register_trigger(trigger, NULL, false); | |
3296 | } | |
3297 | ||
3298 | enum lttng_error_code lttng_register_trigger_with_name( | |
3299 | struct lttng_trigger *trigger, const char *name) | |
3300 | { | |
3301 | const int ret = _lttng_register_trigger(trigger, name, false); | |
3302 | ||
3303 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3304 | } | |
3305 | ||
3306 | enum lttng_error_code lttng_register_trigger_with_automatic_name( | |
3307 | struct lttng_trigger *trigger) | |
3308 | { | |
4bd69c5f | 3309 | const int ret = _lttng_register_trigger(trigger, nullptr, true); |
a5c2d2a7 JG |
3310 | |
3311 | return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; | |
3312 | } | |
3313 | ||
b99a0cb3 JG |
3314 | enum lttng_error_code lttng_error_query_execute( |
3315 | const struct lttng_error_query *query, | |
3316 | const struct lttng_endpoint *endpoint, | |
3317 | struct lttng_error_query_results **results) | |
3318 | { | |
3319 | int ret; | |
3320 | enum lttng_error_code ret_code; | |
3321 | struct lttcomm_session_msg lsm = { | |
3322 | .cmd_type = LTTNG_EXECUTE_ERROR_QUERY, | |
3323 | }; | |
3324 | struct lttng_payload message; | |
3325 | struct lttng_payload reply; | |
3326 | struct lttcomm_session_msg *message_lsm; | |
3327 | ||
3328 | lttng_payload_init(&message); | |
3329 | lttng_payload_init(&reply); | |
3330 | ||
3331 | if (!query || !results) { | |
3332 | ret_code = LTTNG_ERR_INVALID; | |
3333 | goto end; | |
3334 | } | |
3335 | ||
3336 | if (endpoint != lttng_session_daemon_command_endpoint) { | |
3337 | ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; | |
3338 | goto end; | |
3339 | } | |
3340 | ||
3341 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3342 | if (ret) { | |
3343 | ret_code = LTTNG_ERR_NOMEM; | |
3344 | goto end; | |
3345 | } | |
3346 | ||
3347 | ret = lttng_error_query_serialize(query, &message); | |
3348 | if (ret) { | |
3349 | ret_code = LTTNG_ERR_UNK; | |
3350 | goto end; | |
3351 | } | |
3352 | ||
3353 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3354 | message_lsm->u.error_query.length = | |
3355 | (uint32_t) message.buffer.size - sizeof(lsm); | |
3356 | ||
3357 | { | |
3358 | struct lttng_payload_view message_view = | |
3359 | lttng_payload_view_from_payload( | |
3360 | &message, 0, -1); | |
3361 | ||
3362 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3363 | &message_view); | |
3364 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3365 | if (ret < 0) { | |
4bd69c5f | 3366 | ret_code =(lttng_error_code) -ret; |
b99a0cb3 JG |
3367 | goto end; |
3368 | } | |
3369 | } | |
3370 | ||
3371 | { | |
3372 | ssize_t reply_create_ret; | |
3373 | struct lttng_payload_view reply_view = | |
3374 | lttng_payload_view_from_payload( | |
3375 | &reply, 0, reply.buffer.size); | |
3376 | ||
3377 | reply_create_ret = lttng_error_query_results_create_from_payload( | |
3378 | &reply_view, results); | |
3379 | if (reply_create_ret < 0) { | |
3380 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3381 | goto end; | |
3382 | } | |
3383 | } | |
3384 | ||
3385 | ret_code = LTTNG_OK; | |
3386 | end: | |
3387 | lttng_payload_reset(&message); | |
3388 | lttng_payload_reset(&reply); | |
3389 | return ret_code; | |
3390 | } | |
3391 | ||
b61776fb | 3392 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3393 | { |
3394 | int ret; | |
3395 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3396 | struct lttcomm_session_msg *message_lsm; |
3397 | struct lttng_payload message; | |
3398 | struct lttng_payload reply; | |
b61776fb | 3399 | struct lttng_trigger *copy = NULL; |
64eafdf6 JR |
3400 | const struct lttng_credentials user_creds = { |
3401 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3402 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3403 | }; | |
99608320 JR |
3404 | |
3405 | lttng_payload_init(&message); | |
3406 | lttng_payload_init(&reply); | |
a58c490f JG |
3407 | |
3408 | if (!trigger) { | |
3409 | ret = -LTTNG_ERR_INVALID; | |
3410 | goto end; | |
3411 | } | |
3412 | ||
b61776fb SM |
3413 | copy = lttng_trigger_copy(trigger); |
3414 | if (!copy) { | |
3415 | ret = -LTTNG_ERR_UNK; | |
3416 | goto end; | |
3417 | } | |
3418 | ||
3419 | if (!copy->creds.uid.is_set) { | |
3420 | /* Use the client credentials as the trigger credentials */ | |
3421 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3422 | } else { |
3423 | /* | |
3424 | * Validate that either the current trigger credentials and the | |
3425 | * client credentials are identical or that the current user is | |
3426 | * root. The root user can register, unregister triggers for | |
3427 | * himself and other users. | |
3428 | * | |
3429 | * This check is also present on the sessiond side, using the | |
3430 | * credentials passed on the socket. These check are all | |
3431 | * "safety" checks. | |
3432 | */ | |
3433 | const struct lttng_credentials *trigger_creds = | |
b61776fb | 3434 | lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3435 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3436 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3437 | ret = -LTTNG_ERR_EPERM; | |
3438 | goto end; | |
3439 | } | |
3440 | } | |
3441 | } | |
3442 | ||
b61776fb | 3443 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3444 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3445 | goto end; |
3446 | } | |
3447 | ||
99608320 JR |
3448 | memset(&lsm, 0, sizeof(lsm)); |
3449 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3450 | ||
97285430 JG |
3451 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3452 | if (ret) { | |
3453 | ret = -LTTNG_ERR_NOMEM; | |
3454 | goto end; | |
3455 | } | |
99608320 | 3456 | |
b61776fb | 3457 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3458 | if (ret < 0) { |
a58c490f JG |
3459 | ret = -LTTNG_ERR_UNK; |
3460 | goto end; | |
3461 | } | |
3462 | ||
b0a79813 FD |
3463 | /* |
3464 | * This is needed to populate the trigger object size for the command | |
3465 | * header and number of fds sent. | |
3466 | */ | |
3467 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3468 | ||
99608320 JR |
3469 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3470 | ||
3471 | { | |
3472 | struct lttng_payload_view message_view = | |
3473 | lttng_payload_view_from_payload( | |
3474 | &message, 0, -1); | |
3475 | ||
3476 | /* | |
3477 | * Update the message header with the number of fd that will be | |
3478 | * sent. | |
3479 | */ | |
3480 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3481 | &message_view); | |
3482 | ||
3483 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3484 | if (ret < 0) { | |
3485 | goto end; | |
3486 | } | |
3487 | } | |
3488 | ||
3489 | ret = 0; | |
a58c490f | 3490 | end: |
b61776fb | 3491 | lttng_trigger_destroy(copy); |
99608320 JR |
3492 | lttng_payload_reset(&message); |
3493 | lttng_payload_reset(&reply); | |
a58c490f JG |
3494 | return ret; |
3495 | } | |
3496 | ||
fbc9f37d JR |
3497 | /* |
3498 | * Ask the session daemon for all registered triggers for the current user. | |
3499 | * | |
3500 | * Allocates and return an lttng_triggers set. | |
3501 | * On error, returns a suitable lttng_error_code. | |
3502 | */ | |
3503 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3504 | { | |
3505 | int ret; | |
3506 | enum lttng_error_code ret_code = LTTNG_OK; | |
3507 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS }; | |
3508 | struct lttng_triggers *local_triggers = NULL; | |
3509 | struct lttng_payload reply; | |
3510 | struct lttng_payload_view lsm_view = | |
3511 | lttng_payload_view_init_from_buffer( | |
3512 | (const char *) &lsm, 0, sizeof(lsm)); | |
3513 | ||
3514 | lttng_payload_init(&reply); | |
3515 | ||
3516 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3517 | if (ret < 0) { | |
3518 | ret_code = (enum lttng_error_code) -ret; | |
3519 | goto end; | |
3520 | } | |
3521 | ||
3522 | { | |
3523 | struct lttng_payload_view reply_view = | |
3524 | lttng_payload_view_from_payload( | |
3525 | &reply, 0, reply.buffer.size); | |
3526 | ||
3527 | ret = lttng_triggers_create_from_payload( | |
3528 | &reply_view, &local_triggers); | |
3529 | if (ret < 0) { | |
3530 | ret_code = LTTNG_ERR_FATAL; | |
3531 | goto end; | |
3532 | } | |
3533 | } | |
3534 | ||
3535 | *triggers = local_triggers; | |
3536 | local_triggers = NULL; | |
3537 | end: | |
3538 | lttng_payload_reset(&reply); | |
3539 | lttng_triggers_destroy(local_triggers); | |
3540 | return ret_code; | |
3541 | } | |
3542 | ||
fac6795d | 3543 | /* |
9ae110e2 | 3544 | * lib constructor. |
fac6795d | 3545 | */ |
b2b89e8a | 3546 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3547 | { |
3548 | /* Set default session group */ | |
bbccc3d2 | 3549 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3550 | } |
49cca668 DG |
3551 | |
3552 | /* | |
9ae110e2 | 3553 | * lib destructor. |
49cca668 | 3554 | */ |
b2b89e8a | 3555 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3556 | { |
3557 | free(tracing_group); | |
3558 | } |