Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
826d496d | 6 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
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 | ||
ebdb334b | 13 | #include "lttng/domain.h" |
6c1c0768 | 14 | #define _LGPL_SOURCE |
44a5e5eb | 15 | #include <assert.h> |
fac6795d DG |
16 | #include <grp.h> |
17 | #include <stdio.h> | |
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
20 | #include <unistd.h> | |
21 | ||
0ae3cfc6 | 22 | #include <common/bytecode/bytecode.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> |
159b042f | 27 | #include <common/dynamic-buffer.h> |
fe489250 | 28 | #include <common/dynamic-array.h> |
9e620ea7 JG |
29 | #include <common/payload.h> |
30 | #include <common/payload-view.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> | |
de453daa | 39 | #include <lttng/event-internal.h> |
159b042f JG |
40 | #include <lttng/health-internal.h> |
41 | #include <lttng/lttng.h> | |
ebdb334b JR |
42 | #include <lttng/map/map-internal.h> |
43 | #include <lttng/map/map-query-internal.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> | |
fe489250 | 48 | #include <lttng/lttng-error.h> |
fac6795d | 49 | |
e4d2f27a JR |
50 | #include <common/filter/filter-ast.h> |
51 | #include <common/filter/filter-parser.h> | |
e4d2f27a | 52 | #include <common/filter/memstream.h> |
cac3069d | 53 | #include "lttng-ctl-helper.h" |
53a80697 | 54 | |
60160d2a JG |
55 | #define COPY_DOMAIN_PACKED(dst, src) \ |
56 | do { \ | |
57 | struct lttng_domain _tmp_domain; \ | |
58 | \ | |
59 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
60 | dst = _tmp_domain; \ | |
61 | } while (0) | |
53a80697 | 62 | |
fac6795d | 63 | /* Socket to session daemon for communication */ |
3e3665b8 | 64 | static int sessiond_socket = -1; |
fac6795d DG |
65 | static char sessiond_sock_path[PATH_MAX]; |
66 | ||
fac6795d DG |
67 | /* Variables */ |
68 | static char *tracing_group; | |
69 | static int connected; | |
70 | ||
97e19046 DG |
71 | /* Global */ |
72 | ||
73 | /* | |
74 | * Those two variables are used by error.h to silent or control the verbosity of | |
75 | * error message. They are global to the library so application linking with it | |
76 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
77 | */ |
78 | int lttng_opt_quiet; | |
79 | int lttng_opt_verbose; | |
c7e35b03 | 80 | int lttng_opt_mi; |
97e19046 | 81 | |
fac6795d | 82 | /* |
cd80958d | 83 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 84 | * |
cd80958d DG |
85 | * If domain is unknown, default domain will be the kernel. |
86 | */ | |
cac3069d DG |
87 | LTTNG_HIDDEN |
88 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
89 | struct lttng_domain *src) | |
cd80958d DG |
90 | { |
91 | if (src && dst) { | |
92 | switch (src->type) { | |
00e2e675 DG |
93 | case LTTNG_DOMAIN_KERNEL: |
94 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 95 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 96 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 97 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
98 | memcpy(dst, src, sizeof(struct lttng_domain)); |
99 | break; | |
100 | default: | |
101 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 102 | break; |
cd80958d DG |
103 | } |
104 | } | |
105 | } | |
106 | ||
107 | /* | |
108 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 109 | * |
1c8d13c8 TD |
110 | * On success, returns the number of bytes sent (>=0) |
111 | * On error, returns -1 | |
fac6795d | 112 | */ |
cd80958d | 113 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
114 | { |
115 | int ret; | |
116 | ||
117 | if (!connected) { | |
2f70b271 | 118 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 119 | goto end; |
fac6795d DG |
120 | } |
121 | ||
19f912db FD |
122 | DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str(lsm->cmd_type), |
123 | lsm->cmd_type); | |
a4b92340 | 124 | |
be040666 | 125 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 126 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
127 | if (ret < 0) { |
128 | ret = -LTTNG_ERR_FATAL; | |
129 | } | |
e065084a DG |
130 | |
131 | end: | |
132 | return ret; | |
133 | } | |
134 | ||
53a80697 MD |
135 | /* |
136 | * Send var len data to the session daemon. | |
137 | * | |
138 | * On success, returns the number of bytes sent (>=0) | |
139 | * On error, returns -1 | |
140 | */ | |
c2d69327 | 141 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
142 | { |
143 | int ret; | |
144 | ||
145 | if (!connected) { | |
2f70b271 | 146 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
147 | goto end; |
148 | } | |
a4b92340 | 149 | |
53a80697 MD |
150 | if (!data || !len) { |
151 | ret = 0; | |
152 | goto end; | |
153 | } | |
154 | ||
155 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
156 | if (ret < 0) { |
157 | ret = -LTTNG_ERR_FATAL; | |
158 | } | |
53a80697 MD |
159 | |
160 | end: | |
161 | return ret; | |
162 | } | |
163 | ||
a04d53fc FD |
164 | /* |
165 | * Send file descriptors to the session daemon. | |
166 | * | |
167 | * On success, returns the number of bytes sent (>=0) | |
168 | * On error, returns -1 | |
169 | */ | |
170 | static int send_session_fds(const int *fds, size_t nb_fd) | |
171 | { | |
172 | int ret; | |
173 | ||
174 | if (!connected) { | |
175 | ret = -LTTNG_ERR_NO_SESSIOND; | |
176 | goto end; | |
177 | } | |
178 | ||
179 | if (!fds || !nb_fd) { | |
180 | ret = 0; | |
181 | goto end; | |
182 | } | |
183 | ||
184 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
185 | if (ret < 0) { | |
186 | ret = -LTTNG_ERR_FATAL; | |
187 | } | |
188 | ||
189 | end: | |
190 | return ret; | |
191 | } | |
192 | ||
e065084a | 193 | /* |
cd80958d | 194 | * Receive data from the sessiond socket. |
e065084a | 195 | * |
1c8d13c8 | 196 | * On success, returns the number of bytes received (>=0) |
e368fb43 | 197 | * On error, returns a negative lttng_error_code. |
e065084a | 198 | */ |
ca95a216 | 199 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
200 | { |
201 | int ret; | |
202 | ||
bacc41cc FD |
203 | assert(len > 0); |
204 | ||
e065084a | 205 | if (!connected) { |
2f70b271 | 206 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 207 | goto end; |
fac6795d DG |
208 | } |
209 | ||
ca95a216 | 210 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
211 | if (ret < 0) { |
212 | ret = -LTTNG_ERR_FATAL; | |
bacc41cc FD |
213 | } else if (ret == 0) { |
214 | ret = -LTTNG_ERR_NO_SESSIOND; | |
2f70b271 | 215 | } |
fac6795d | 216 | |
e065084a | 217 | end: |
fac6795d DG |
218 | return ret; |
219 | } | |
220 | ||
e368fb43 JG |
221 | /* |
222 | * Receive a payload from the session daemon by appending to an existing | |
223 | * payload. | |
224 | * On success, returns the number of bytes received (>=0) | |
225 | * On error, returns a negative lttng_error_code. | |
226 | */ | |
227 | static int recv_payload_sessiond(struct lttng_payload *payload, size_t len) | |
228 | { | |
229 | int ret; | |
230 | const size_t original_payload_size = payload->buffer.size; | |
231 | ||
232 | ret = lttng_dynamic_buffer_set_size( | |
233 | &payload->buffer, payload->buffer.size + len); | |
234 | if (ret) { | |
235 | ret = -LTTNG_ERR_NOMEM; | |
236 | goto end; | |
237 | } | |
238 | ||
239 | ret = recv_data_sessiond( | |
240 | payload->buffer.data + original_payload_size, len); | |
241 | end: | |
242 | return ret; | |
243 | } | |
244 | ||
fac6795d | 245 | /* |
9ae110e2 | 246 | * Check if we are in the specified group. |
65beb5ff | 247 | * |
9ae110e2 | 248 | * If yes return 1, else return -1. |
947308c4 | 249 | */ |
6c71277b MD |
250 | LTTNG_HIDDEN |
251 | int lttng_check_tracing_group(void) | |
947308c4 | 252 | { |
28ab59d0 | 253 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
254 | int grp_list_size, grp_id, i; |
255 | int ret = -1; | |
6c71277b | 256 | const char *grp_name = tracing_group; |
947308c4 DG |
257 | |
258 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 259 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 260 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
261 | goto end; |
262 | } | |
263 | ||
264 | /* Get number of supplementary group IDs */ | |
265 | grp_list_size = getgroups(0, NULL); | |
266 | if (grp_list_size < 0) { | |
6f04ed72 | 267 | PERROR("getgroups"); |
947308c4 DG |
268 | goto end; |
269 | } | |
270 | ||
271 | /* Alloc group list of the right size */ | |
3f451dc0 | 272 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 273 | if (!grp_list) { |
6f04ed72 | 274 | PERROR("malloc"); |
00795392 MD |
275 | goto end; |
276 | } | |
947308c4 | 277 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 278 | if (grp_id < 0) { |
6f04ed72 | 279 | PERROR("getgroups"); |
947308c4 DG |
280 | goto free_list; |
281 | } | |
282 | ||
283 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 284 | if (grp_list[i] == tracing_gid) { |
2269e89e | 285 | ret = 1; |
947308c4 DG |
286 | break; |
287 | } | |
288 | } | |
289 | ||
290 | free_list: | |
291 | free(grp_list); | |
292 | ||
293 | end: | |
294 | return ret; | |
295 | } | |
296 | ||
09b72f7a FD |
297 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
298 | { | |
299 | int ret; | |
300 | long num_cpu; | |
301 | size_t best_mem_info; | |
302 | size_t num_bytes_requested_total; | |
303 | ||
304 | /* | |
305 | * Get the number of CPU currently online to compute the amount of | |
306 | * memory needed to create a buffer for every CPU. | |
307 | */ | |
308 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
309 | if (num_cpu == -1) { | |
310 | goto error; | |
311 | } | |
312 | ||
313 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
314 | ||
315 | /* | |
316 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
317 | * reliable estimate we can get but it is only exposed by the kernel | |
318 | * since 3.14. (See Linux kernel commit: | |
319 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
320 | */ | |
321 | ret = utils_get_memory_available(&best_mem_info); | |
322 | if (ret >= 0) { | |
323 | goto success; | |
324 | } | |
325 | ||
326 | /* | |
327 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
328 | * is a sanity check for obvious user error. | |
329 | */ | |
330 | ret = utils_get_memory_total(&best_mem_info); | |
331 | if (ret >= 0) { | |
332 | goto success; | |
333 | } | |
334 | ||
335 | error: | |
336 | return -1; | |
337 | success: | |
338 | return best_mem_info >= num_bytes_requested_total; | |
339 | } | |
340 | ||
947308c4 | 341 | /* |
2269e89e DG |
342 | * Try connect to session daemon with sock_path. |
343 | * | |
344 | * Return 0 on success, else -1 | |
345 | */ | |
346 | static int try_connect_sessiond(const char *sock_path) | |
347 | { | |
348 | int ret; | |
349 | ||
350 | /* If socket exist, we check if the daemon listens for connect. */ | |
351 | ret = access(sock_path, F_OK); | |
352 | if (ret < 0) { | |
353 | /* Not alive */ | |
2f70b271 | 354 | goto error; |
2269e89e DG |
355 | } |
356 | ||
357 | ret = lttcomm_connect_unix_sock(sock_path); | |
358 | if (ret < 0) { | |
9ae110e2 | 359 | /* Not alive. */ |
2f70b271 | 360 | goto error; |
2269e89e DG |
361 | } |
362 | ||
363 | ret = lttcomm_close_unix_sock(ret); | |
364 | if (ret < 0) { | |
6f04ed72 | 365 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
366 | } |
367 | ||
368 | return 0; | |
2f70b271 DG |
369 | |
370 | error: | |
371 | return -1; | |
2269e89e DG |
372 | } |
373 | ||
374 | /* | |
2f70b271 DG |
375 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
376 | * variable. | |
377 | * | |
378 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
379 | * is somehow too long or ENOMEM). | |
947308c4 DG |
380 | */ |
381 | static int set_session_daemon_path(void) | |
382 | { | |
9ae110e2 | 383 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
384 | uid_t uid; |
385 | ||
386 | uid = getuid(); | |
947308c4 | 387 | |
2269e89e DG |
388 | if (uid != 0) { |
389 | /* Are we in the tracing group ? */ | |
6c71277b | 390 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
391 | } |
392 | ||
08a9c49f | 393 | if ((uid == 0) || in_tgroup) { |
e1b624d0 JG |
394 | const int ret = lttng_strncpy(sessiond_sock_path, |
395 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
396 | sizeof(sessiond_sock_path)); | |
397 | ||
398 | if (ret) { | |
399 | goto error; | |
400 | } | |
08a9c49f | 401 | } |
2269e89e | 402 | |
08a9c49f | 403 | if (uid != 0) { |
c617c0c6 MD |
404 | int ret; |
405 | ||
08a9c49f | 406 | if (in_tgroup) { |
9ae110e2 | 407 | /* Tracing group. */ |
08a9c49f TD |
408 | ret = try_connect_sessiond(sessiond_sock_path); |
409 | if (ret >= 0) { | |
410 | goto end; | |
2269e89e | 411 | } |
08a9c49f | 412 | /* Global session daemon not available... */ |
2269e89e | 413 | } |
08a9c49f TD |
414 | /* ...or not in tracing group (and not root), default */ |
415 | ||
416 | /* | |
9ae110e2 JG |
417 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
418 | * is too small; | |
419 | * With GNU C >= 2.1, snprintf returns the required size | |
420 | * (excluding closing null) | |
08a9c49f TD |
421 | */ |
422 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 423 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 424 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 425 | goto error; |
947308c4 | 426 | } |
947308c4 | 427 | } |
08a9c49f | 428 | end: |
947308c4 | 429 | return 0; |
2f70b271 DG |
430 | |
431 | error: | |
432 | return -1; | |
947308c4 DG |
433 | } |
434 | ||
65beb5ff | 435 | /* |
9ae110e2 | 436 | * Connect to the LTTng session daemon. |
65beb5ff | 437 | * |
3e3665b8 | 438 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 439 | */ |
3e3665b8 | 440 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
441 | { |
442 | int ret; | |
443 | ||
444 | ret = set_session_daemon_path(); | |
445 | if (ret < 0) { | |
2f70b271 | 446 | goto error; |
65beb5ff DG |
447 | } |
448 | ||
9ae110e2 | 449 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
450 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
451 | if (ret < 0) { | |
2f70b271 | 452 | goto error; |
65beb5ff DG |
453 | } |
454 | ||
3e3665b8 | 455 | return ret; |
2f70b271 DG |
456 | |
457 | error: | |
458 | return -1; | |
65beb5ff DG |
459 | } |
460 | ||
3e3665b8 JG |
461 | static void reset_global_sessiond_connection_state(void) |
462 | { | |
463 | sessiond_socket = -1; | |
464 | connected = 0; | |
465 | } | |
466 | ||
65beb5ff | 467 | /* |
1c8d13c8 | 468 | * Clean disconnect from the session daemon. |
9ae110e2 | 469 | * |
1c8d13c8 | 470 | * On success, return 0. On error, return -1. |
65beb5ff DG |
471 | */ |
472 | static int disconnect_sessiond(void) | |
473 | { | |
474 | int ret = 0; | |
475 | ||
476 | if (connected) { | |
477 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 478 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
479 | } |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
795a978d PP |
484 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
485 | size_t *user_len) | |
486 | { | |
487 | int ret = 0; | |
488 | void *buf = NULL; | |
489 | ||
490 | if (len) { | |
491 | if (!user_len) { | |
492 | ret = -LTTNG_ERR_INVALID; | |
493 | goto end; | |
494 | } | |
495 | ||
496 | buf = zmalloc(len); | |
497 | if (!buf) { | |
498 | ret = -ENOMEM; | |
499 | goto end; | |
500 | } | |
501 | ||
502 | ret = recv_data_sessiond(buf, len); | |
503 | if (ret < 0) { | |
504 | goto end; | |
505 | } | |
506 | ||
507 | if (!user_buf) { | |
508 | ret = -LTTNG_ERR_INVALID; | |
509 | goto end; | |
510 | } | |
511 | ||
512 | /* Move ownership of command header buffer to user. */ | |
513 | *user_buf = buf; | |
514 | buf = NULL; | |
515 | *user_len = len; | |
516 | } else { | |
517 | /* No command header. */ | |
518 | if (user_len) { | |
519 | *user_len = 0; | |
520 | } | |
521 | ||
522 | if (user_buf) { | |
523 | *user_buf = NULL; | |
524 | } | |
525 | } | |
526 | ||
527 | end: | |
528 | free(buf); | |
529 | return ret; | |
530 | } | |
531 | ||
35a6fdb7 | 532 | /* |
cd80958d | 533 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
534 | * Takes extra var. len. data and file descriptors as input to send to the |
535 | * session daemon. | |
65beb5ff | 536 | * |
af87c45a | 537 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 538 | */ |
cac3069d | 539 | LTTNG_HIDDEN |
a04d53fc FD |
540 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
541 | const int *fds, size_t nb_fd, const void *vardata, | |
542 | size_t vardata_len, void **user_payload_buf, | |
543 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
544 | { |
545 | int ret; | |
795a978d | 546 | size_t payload_len; |
cd80958d | 547 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
548 | |
549 | ret = connect_sessiond(); | |
550 | if (ret < 0) { | |
2f70b271 | 551 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 552 | goto end; |
3e3665b8 JG |
553 | } else { |
554 | sessiond_socket = ret; | |
555 | connected = 1; | |
65beb5ff DG |
556 | } |
557 | ||
cd80958d | 558 | ret = send_session_msg(lsm); |
65beb5ff | 559 | if (ret < 0) { |
2f70b271 | 560 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
561 | goto end; |
562 | } | |
53a80697 | 563 | /* Send var len data */ |
795a978d | 564 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 565 | if (ret < 0) { |
2f70b271 | 566 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
567 | goto end; |
568 | } | |
65beb5ff | 569 | |
a04d53fc FD |
570 | /* Send fds */ |
571 | ret = send_session_fds(fds, nb_fd); | |
572 | if (ret < 0) { | |
573 | /* Ret value is a valid lttng error code. */ | |
574 | goto end; | |
575 | } | |
576 | ||
65beb5ff DG |
577 | /* Get header from data transmission */ |
578 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
579 | if (ret < 0) { | |
2f70b271 | 580 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
581 | goto end; |
582 | } | |
583 | ||
584 | /* Check error code if OK */ | |
f73fabfd | 585 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
586 | ret = -llm.ret_code; |
587 | goto end; | |
588 | } | |
589 | ||
795a978d PP |
590 | /* Get command header from data transmission */ |
591 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
592 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 593 | if (ret < 0) { |
65beb5ff DG |
594 | goto end; |
595 | } | |
596 | ||
795a978d PP |
597 | /* Get payload from data transmission */ |
598 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
599 | &payload_len); | |
600 | if (ret < 0) { | |
83009e5e DG |
601 | goto end; |
602 | } | |
603 | ||
795a978d | 604 | ret = llm.data_size; |
65beb5ff DG |
605 | |
606 | end: | |
607 | disconnect_sessiond(); | |
608 | return ret; | |
609 | } | |
610 | ||
e368fb43 JG |
611 | LTTNG_HIDDEN |
612 | int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, | |
613 | struct lttng_payload *reply) | |
614 | { | |
615 | int ret; | |
616 | struct lttcomm_lttng_msg llm; | |
fe489250 | 617 | const int fd_count = lttng_payload_view_get_fd_handle_count(message); |
e368fb43 JG |
618 | |
619 | assert(reply->buffer.size == 0); | |
fe489250 | 620 | assert(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); |
e368fb43 JG |
621 | |
622 | ret = connect_sessiond(); | |
623 | if (ret < 0) { | |
624 | ret = -LTTNG_ERR_NO_SESSIOND; | |
625 | goto end; | |
626 | } else { | |
627 | sessiond_socket = ret; | |
628 | connected = 1; | |
629 | } | |
630 | ||
631 | /* Send command to session daemon */ | |
632 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, message->buffer.data, | |
633 | message->buffer.size); | |
634 | if (ret < 0) { | |
635 | ret = -LTTNG_ERR_FATAL; | |
636 | goto end; | |
637 | } | |
638 | ||
fe489250 JG |
639 | if (fd_count > 0) { |
640 | ret = lttcomm_send_payload_view_fds_unix_sock(sessiond_socket, | |
641 | message); | |
642 | if (ret < 0) { | |
643 | ret = -LTTNG_ERR_FATAL; | |
644 | goto end; | |
645 | } | |
e368fb43 JG |
646 | } |
647 | ||
648 | /* Get header from data transmission */ | |
649 | ret = recv_payload_sessiond(reply, sizeof(llm)); | |
650 | if (ret < 0) { | |
651 | /* Ret value is a valid lttng error code. */ | |
652 | goto end; | |
653 | } | |
654 | ||
655 | llm = *((typeof(llm) *) reply->buffer.data); | |
656 | ||
657 | /* Check error code if OK */ | |
658 | if (llm.ret_code != LTTNG_OK) { | |
eb441106 JG |
659 | if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { |
660 | /* Invalid error code received. */ | |
661 | ret = -LTTNG_ERR_UNK; | |
662 | } else { | |
663 | ret = -llm.ret_code; | |
664 | } | |
e368fb43 JG |
665 | goto end; |
666 | } | |
667 | ||
668 | if (llm.cmd_header_size > 0) { | |
669 | ret = recv_payload_sessiond(reply, llm.cmd_header_size); | |
670 | if (ret < 0) { | |
671 | goto end; | |
672 | } | |
673 | } | |
674 | ||
675 | /* Get command header from data transmission */ | |
676 | if (llm.data_size > 0) { | |
677 | ret = recv_payload_sessiond(reply, llm.data_size); | |
678 | if (ret < 0) { | |
679 | goto end; | |
680 | } | |
681 | } | |
682 | ||
683 | if (llm.fd_count > 0) { | |
fe489250 JG |
684 | ret = lttcomm_recv_payload_fds_unix_sock( |
685 | sessiond_socket, llm.fd_count, reply); | |
686 | if (ret < 0) { | |
e368fb43 JG |
687 | goto end; |
688 | } | |
689 | } | |
690 | ||
691 | /* Don't return the llm header to the caller. */ | |
692 | memmove(reply->buffer.data, reply->buffer.data + sizeof(llm), | |
693 | reply->buffer.size - sizeof(llm)); | |
694 | ret = lttng_dynamic_buffer_set_size( | |
695 | &reply->buffer, reply->buffer.size - sizeof(llm)); | |
696 | if (ret) { | |
697 | /* Can't happen as size is reduced. */ | |
698 | abort(); | |
699 | } | |
700 | ||
701 | ret = reply->buffer.size; | |
702 | ||
703 | end: | |
704 | disconnect_sessiond(); | |
705 | return ret; | |
706 | } | |
707 | ||
9f19cc17 | 708 | /* |
cd80958d | 709 | * Create lttng handle and return pointer. |
9ae110e2 | 710 | * |
1c8d13c8 | 711 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 712 | */ |
cd80958d DG |
713 | struct lttng_handle *lttng_create_handle(const char *session_name, |
714 | struct lttng_domain *domain) | |
9f19cc17 | 715 | { |
e1b624d0 | 716 | int ret; |
2f70b271 DG |
717 | struct lttng_handle *handle = NULL; |
718 | ||
3f451dc0 | 719 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 720 | if (handle == NULL) { |
2f70b271 | 721 | PERROR("malloc handle"); |
cd80958d DG |
722 | goto end; |
723 | } | |
724 | ||
725 | /* Copy session name */ | |
e1b624d0 JG |
726 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
727 | sizeof(handle->session_name)); | |
728 | if (ret) { | |
729 | goto error; | |
730 | } | |
cd80958d | 731 | |
95681498 JG |
732 | /* Copy lttng domain or leave initialized to 0. */ |
733 | if (domain) { | |
734 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
735 | } | |
cd80958d DG |
736 | |
737 | end: | |
738 | return handle; | |
e1b624d0 JG |
739 | error: |
740 | free(handle); | |
741 | return NULL; | |
cd80958d DG |
742 | } |
743 | ||
744 | /* | |
745 | * Destroy handle by free(3) the pointer. | |
746 | */ | |
747 | void lttng_destroy_handle(struct lttng_handle *handle) | |
748 | { | |
0e428499 | 749 | free(handle); |
eb354453 DG |
750 | } |
751 | ||
d9800920 DG |
752 | /* |
753 | * Register an outside consumer. | |
9ae110e2 | 754 | * |
1c8d13c8 | 755 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
756 | */ |
757 | int lttng_register_consumer(struct lttng_handle *handle, | |
758 | const char *socket_path) | |
759 | { | |
e1b624d0 | 760 | int ret; |
d9800920 DG |
761 | struct lttcomm_session_msg lsm; |
762 | ||
2f70b271 | 763 | if (handle == NULL || socket_path == NULL) { |
e1b624d0 JG |
764 | ret = -LTTNG_ERR_INVALID; |
765 | goto end; | |
2f70b271 DG |
766 | } |
767 | ||
53efb85a | 768 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 769 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
e1b624d0 | 770 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 771 | sizeof(lsm.session.name)); |
e1b624d0 JG |
772 | if (ret) { |
773 | ret = -LTTNG_ERR_INVALID; | |
774 | goto end; | |
775 | } | |
776 | ||
60160d2a | 777 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 778 | |
e1b624d0 JG |
779 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
780 | sizeof(lsm.u.reg.path)); | |
781 | if (ret) { | |
782 | ret = -LTTNG_ERR_INVALID; | |
783 | goto end; | |
784 | } | |
d9800920 | 785 | |
e1b624d0 JG |
786 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
787 | end: | |
788 | return ret; | |
d9800920 DG |
789 | } |
790 | ||
1df4dedd | 791 | /* |
9ae110e2 JG |
792 | * Start tracing for all traces of the session. |
793 | * | |
794 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 795 | */ |
6a4f824d | 796 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 797 | { |
e1b624d0 | 798 | int ret; |
cd80958d DG |
799 | struct lttcomm_session_msg lsm; |
800 | ||
6a4f824d | 801 | if (session_name == NULL) { |
e1b624d0 JG |
802 | ret = -LTTNG_ERR_INVALID; |
803 | goto end; | |
cd80958d DG |
804 | } |
805 | ||
53efb85a | 806 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 807 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 808 | |
e1b624d0 JG |
809 | ret = lttng_strncpy(lsm.session.name, session_name, |
810 | sizeof(lsm.session.name)); | |
811 | if (ret) { | |
812 | ret = -LTTNG_ERR_INVALID; | |
813 | goto end; | |
814 | } | |
cd80958d | 815 | |
e1b624d0 JG |
816 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
817 | end: | |
818 | return ret; | |
f3ed775e | 819 | } |
1df4dedd DG |
820 | |
821 | /* | |
38ee087f | 822 | * Stop tracing for all traces of the session. |
f3ed775e | 823 | */ |
38ee087f | 824 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 825 | { |
38ee087f | 826 | int ret, data_ret; |
cd80958d DG |
827 | struct lttcomm_session_msg lsm; |
828 | ||
6a4f824d | 829 | if (session_name == NULL) { |
e1b624d0 JG |
830 | ret = -LTTNG_ERR_INVALID; |
831 | goto error; | |
6a4f824d DG |
832 | } |
833 | ||
53efb85a | 834 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 835 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 836 | |
e1b624d0 JG |
837 | ret = lttng_strncpy(lsm.session.name, session_name, |
838 | sizeof(lsm.session.name)); | |
839 | if (ret) { | |
840 | ret = -LTTNG_ERR_INVALID; | |
841 | goto error; | |
842 | } | |
cd80958d | 843 | |
cac3069d | 844 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
845 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
846 | goto error; | |
847 | } | |
848 | ||
849 | if (!wait) { | |
850 | goto end; | |
851 | } | |
852 | ||
38ee087f DG |
853 | /* Check for data availability */ |
854 | do { | |
6d805429 | 855 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
856 | if (data_ret < 0) { |
857 | /* Return the data available call error. */ | |
858 | ret = data_ret; | |
859 | goto error; | |
860 | } | |
861 | ||
862 | /* | |
9ae110e2 JG |
863 | * Data sleep time before retrying (in usec). Don't sleep if the |
864 | * call returned value indicates availability. | |
38ee087f | 865 | */ |
6d805429 | 866 | if (data_ret) { |
c8f61fd4 | 867 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 868 | } |
6d805429 | 869 | } while (data_ret != 0); |
38ee087f | 870 | |
38ee087f DG |
871 | end: |
872 | error: | |
873 | return ret; | |
874 | } | |
875 | ||
876 | /* | |
877 | * Stop tracing and wait for data availability. | |
878 | */ | |
879 | int lttng_stop_tracing(const char *session_name) | |
880 | { | |
881 | return _lttng_stop_tracing(session_name, 1); | |
882 | } | |
883 | ||
884 | /* | |
885 | * Stop tracing but _don't_ wait for data availability. | |
886 | */ | |
887 | int lttng_stop_tracing_no_wait(const char *session_name) | |
888 | { | |
889 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
890 | } |
891 | ||
892 | /* | |
601d5acf DG |
893 | * Add context to a channel. |
894 | * | |
895 | * If the given channel is NULL, add the contexts to all channels. | |
896 | * The event_name param is ignored. | |
af87c45a DG |
897 | * |
898 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 899 | */ |
cd80958d | 900 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
901 | struct lttng_event_context *ctx, const char *event_name, |
902 | const char *channel_name) | |
d65106b1 | 903 | { |
2001793c JG |
904 | int ret; |
905 | size_t len = 0; | |
906 | char *buf = NULL; | |
cd80958d DG |
907 | struct lttcomm_session_msg lsm; |
908 | ||
9ae110e2 | 909 | /* Safety check. Both are mandatory. */ |
9d697d3d | 910 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
911 | ret = -LTTNG_ERR_INVALID; |
912 | goto end; | |
cd80958d DG |
913 | } |
914 | ||
441c16a7 | 915 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
916 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
917 | ||
85076754 | 918 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
919 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
920 | sizeof(lsm.u.context.channel_name)); | |
921 | if (ret) { | |
922 | ret = -LTTNG_ERR_INVALID; | |
923 | goto end; | |
85076754 | 924 | } |
cd80958d | 925 | |
60160d2a | 926 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
e1b624d0 | 927 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 928 | sizeof(lsm.session.name)); |
e1b624d0 JG |
929 | if (ret) { |
930 | ret = -LTTNG_ERR_INVALID; | |
931 | goto end; | |
932 | } | |
cd80958d | 933 | |
2001793c JG |
934 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
935 | size_t provider_len, ctx_len; | |
936 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
937 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
938 | ||
939 | if (!provider_name || !ctx_name) { | |
940 | ret = -LTTNG_ERR_INVALID; | |
941 | goto end; | |
942 | } | |
943 | ||
944 | provider_len = strlen(provider_name); | |
945 | if (provider_len == 0) { | |
946 | ret = -LTTNG_ERR_INVALID; | |
947 | goto end; | |
948 | } | |
949 | lsm.u.context.provider_name_len = provider_len; | |
950 | ||
951 | ctx_len = strlen(ctx_name); | |
952 | if (ctx_len == 0) { | |
953 | ret = -LTTNG_ERR_INVALID; | |
954 | goto end; | |
955 | } | |
956 | lsm.u.context.context_name_len = ctx_len; | |
957 | ||
958 | len = provider_len + ctx_len; | |
959 | buf = zmalloc(len); | |
960 | if (!buf) { | |
961 | ret = -LTTNG_ERR_NOMEM; | |
962 | goto end; | |
963 | } | |
964 | ||
965 | memcpy(buf, provider_name, provider_len); | |
966 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
967 | } | |
968 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
969 | |
970 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
971 | /* | |
972 | * Don't leak application addresses to the sessiond. | |
973 | * This is only necessary when ctx is for an app ctx otherwise | |
974 | * the values inside the union (type & config) are overwritten. | |
975 | */ | |
976 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
977 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
978 | } | |
2001793c | 979 | |
795a978d | 980 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
981 | end: |
982 | free(buf); | |
983 | return ret; | |
d65106b1 DG |
984 | } |
985 | ||
f3ed775e | 986 | /* |
9ae110e2 JG |
987 | * Enable event(s) for a channel. |
988 | * | |
989 | * If no event name is specified, all events are enabled. | |
990 | * If no channel name is specified, the default 'channel0' is used. | |
991 | * | |
992 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 993 | */ |
cd80958d | 994 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 995 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 996 | { |
f8a96544 JI |
997 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
998 | NULL, 0, NULL); | |
1df4dedd DG |
999 | } |
1000 | ||
53a80697 | 1001 | /* |
025faf73 | 1002 | * Create or enable an event with a filter expression. |
178191b3 | 1003 | * |
53a80697 MD |
1004 | * Return negative error value on error. |
1005 | * Return size of returned session payload data if OK. | |
1006 | */ | |
025faf73 | 1007 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 1008 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
1009 | const char *filter_expression) |
1010 | { | |
f8a96544 JI |
1011 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
1012 | filter_expression, 0, NULL); | |
53a80697 MD |
1013 | } |
1014 | ||
347c5ab5 | 1015 | /* |
0e115563 | 1016 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
1017 | * NULL if not applicable. |
1018 | * | |
1019 | * An event with NO loglevel and the name is * will return NULL. | |
1020 | */ | |
0e115563 | 1021 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
1022 | { |
1023 | int err; | |
0e115563 | 1024 | char *agent_filter = NULL; |
347c5ab5 DG |
1025 | |
1026 | assert(ev); | |
1027 | ||
1028 | /* Don't add filter for the '*' event. */ | |
9f449915 | 1029 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 1030 | if (filter) { |
0e115563 | 1031 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
1032 | ev->name); |
1033 | } else { | |
0e115563 | 1034 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
1035 | } |
1036 | if (err < 0) { | |
1037 | PERROR("asprintf"); | |
6a556f7b | 1038 | goto error; |
347c5ab5 DG |
1039 | } |
1040 | } | |
1041 | ||
1042 | /* Add loglevel filtering if any for the JUL domain. */ | |
1043 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 1044 | const char *op; |
347c5ab5 DG |
1045 | |
1046 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
1047 | op = ">="; | |
1048 | } else { | |
1049 | op = "=="; | |
1050 | } | |
1051 | ||
0e115563 | 1052 | if (filter || agent_filter) { |
6a556f7b JG |
1053 | char *new_filter; |
1054 | ||
fb0edb23 | 1055 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 1056 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 1057 | ev->loglevel); |
0e115563 DG |
1058 | if (agent_filter) { |
1059 | free(agent_filter); | |
6a556f7b | 1060 | } |
0e115563 | 1061 | agent_filter = new_filter; |
347c5ab5 | 1062 | } else { |
0e115563 | 1063 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
1064 | ev->loglevel); |
1065 | } | |
1066 | if (err < 0) { | |
1067 | PERROR("asprintf"); | |
6a556f7b | 1068 | goto error; |
347c5ab5 DG |
1069 | } |
1070 | } | |
1071 | ||
0e115563 | 1072 | return agent_filter; |
6a556f7b | 1073 | error: |
0e115563 | 1074 | free(agent_filter); |
6a556f7b | 1075 | return NULL; |
347c5ab5 DG |
1076 | } |
1077 | ||
93deb080 JI |
1078 | /* |
1079 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1080 | * If no event name is specified, all events are enabled. | |
1081 | * If no channel name is specified, the default name is used. | |
1082 | * If filter expression is not NULL, the filter is set for the event. | |
1083 | * If exclusion count is not zero, the exclusions are set for the event. | |
1084 | * Returns size of returned session payload data or a negative error code. | |
1085 | */ | |
1086 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1087 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1088 | const char *original_filter_expression, |
93deb080 JI |
1089 | int exclusion_count, char **exclusion_list) |
1090 | { | |
1091 | struct lttcomm_session_msg lsm; | |
e368fb43 JG |
1092 | struct lttng_payload payload; |
1093 | int ret = 0, i; | |
137b9942 | 1094 | unsigned int free_filter_expression = 0; |
93deb080 | 1095 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1096 | |
6a0838b7 YL |
1097 | /* |
1098 | * We have either a filter or some exclusions, so we need to set up | |
e368fb43 | 1099 | * a variable-length payload from where to send the data. |
6a0838b7 | 1100 | */ |
e368fb43 | 1101 | lttng_payload_init(&payload); |
ec005ec6 | 1102 | |
e9efbcd3 JG |
1103 | /* |
1104 | * Cast as non-const since we may replace the filter expression | |
1105 | * by a dynamically allocated string. Otherwise, the original | |
1106 | * string is not modified. | |
1107 | */ | |
1108 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1109 | |
1110 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1111 | ret = -LTTNG_ERR_INVALID; |
1112 | goto error; | |
93deb080 JI |
1113 | } |
1114 | ||
9ae110e2 JG |
1115 | /* |
1116 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1117 | * anyway, so treat this corner-case early to eliminate |
1118 | * lttng_fmemopen error for 0-byte allocation. | |
1119 | */ | |
1120 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1121 | ret = -LTTNG_ERR_INVALID; |
1122 | goto error; | |
93deb080 JI |
1123 | } |
1124 | ||
1125 | memset(&lsm, 0, sizeof(lsm)); | |
1126 | ||
1127 | /* If no channel name, send empty string. */ | |
e1b624d0 JG |
1128 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", |
1129 | sizeof(lsm.u.enable.channel_name)); | |
1130 | if (ret) { | |
1131 | ret = -LTTNG_ERR_INVALID; | |
1132 | goto error; | |
93deb080 JI |
1133 | } |
1134 | ||
18a720cd MD |
1135 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1136 | if (ev->name[0] == '\0') { | |
e1b624d0 JG |
1137 | /* Enable all events. */ |
1138 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
1139 | assert(ret == 0); | |
6565421f | 1140 | } |
93deb080 | 1141 | |
60160d2a | 1142 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1143 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1144 | ||
e1b624d0 | 1145 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
93deb080 | 1146 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1147 | if (ret) { |
1148 | ret = -LTTNG_ERR_INVALID; | |
1149 | goto error; | |
1150 | } | |
1151 | ||
93deb080 JI |
1152 | lsm.u.enable.exclusion_count = exclusion_count; |
1153 | lsm.u.enable.bytecode_len = 0; | |
1154 | ||
9ae110e2 | 1155 | /* Parse filter expression. */ |
5cdb6027 | 1156 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1157 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1158 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1159 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1160 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1161 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1162 | char *agent_filter; | |
64226865 | 1163 | |
347c5ab5 | 1164 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1165 | agent_filter = set_agent_filter(filter_expression, ev); |
1166 | if (!agent_filter) { | |
137b9942 | 1167 | if (!filter_expression) { |
9ae110e2 JG |
1168 | /* |
1169 | * No JUL and no filter, just skip | |
1170 | * everything below. | |
1171 | */ | |
137b9942 DG |
1172 | goto ask_sessiond; |
1173 | } | |
64226865 DG |
1174 | } else { |
1175 | /* | |
9ae110e2 JG |
1176 | * With an agent filter, the original filter has |
1177 | * been added to it thus replace the filter | |
1178 | * expression. | |
64226865 | 1179 | */ |
0e115563 | 1180 | filter_expression = agent_filter; |
e9efbcd3 | 1181 | free_filter_expression = 1; |
9b21e6d5 | 1182 | } |
9b21e6d5 | 1183 | } |
93deb080 | 1184 | |
e4d2f27a | 1185 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
93deb080 | 1186 | if (ret) { |
137b9942 | 1187 | goto filter_error; |
93deb080 | 1188 | } |
e4d2f27a JR |
1189 | |
1190 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1191 | + bytecode_get_len(&ctx->bytecode->b); | |
1192 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6b453b5e JG |
1193 | } |
1194 | ||
e368fb43 JG |
1195 | ret = lttng_dynamic_buffer_set_capacity(&payload.buffer, |
1196 | lsm.u.enable.bytecode_len + | |
1197 | lsm.u.enable.expression_len + | |
1198 | LTTNG_SYMBOL_NAME_LEN * | |
1199 | exclusion_count); | |
15e37663 | 1200 | if (ret) { |
6b453b5e | 1201 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1202 | goto mem_error; |
6b453b5e | 1203 | } |
137b9942 | 1204 | |
9ae110e2 | 1205 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1206 | for (i = 0; i < exclusion_count; i++) { |
1207 | size_t exclusion_len; | |
1208 | ||
1209 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1210 | LTTNG_SYMBOL_NAME_LEN); | |
1211 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1212 | /* Exclusion is not NULL-terminated. */ | |
1213 | ret = -LTTNG_ERR_INVALID; | |
1214 | goto mem_error; | |
1215 | } | |
1216 | ||
e368fb43 | 1217 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
ebdb334b | 1218 | exclusion_list[i], exclusion_len); |
15e37663 JG |
1219 | if (ret) { |
1220 | goto mem_error; | |
1221 | } | |
ebdb334b JR |
1222 | |
1223 | for (int i = 0; i < (LTTNG_SYMBOL_NAME_LEN - exclusion_len); i++) { | |
1224 | char c = 0; | |
1225 | ||
1226 | lttng_dynamic_buffer_append(&payload.buffer, &c, 1); | |
1227 | } | |
6b453b5e | 1228 | } |
15e37663 | 1229 | |
9ae110e2 | 1230 | /* Add filter expression next. */ |
15e37663 | 1231 | if (filter_expression) { |
e368fb43 | 1232 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1233 | filter_expression, lsm.u.enable.expression_len); |
1234 | if (ret) { | |
1235 | goto mem_error; | |
1236 | } | |
6b453b5e | 1237 | } |
9ae110e2 | 1238 | /* Add filter bytecode next. */ |
137b9942 | 1239 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
e368fb43 | 1240 | ret = lttng_dynamic_buffer_append(&payload.buffer, |
15e37663 JG |
1241 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); |
1242 | if (ret) { | |
1243 | goto mem_error; | |
1244 | } | |
1245 | } | |
1246 | if (ev->extended.ptr) { | |
1247 | struct lttng_event_extended *ev_ext = | |
1248 | (struct lttng_event_extended *) ev->extended.ptr; | |
1249 | ||
1250 | if (ev_ext->probe_location) { | |
1251 | /* | |
1252 | * lttng_userspace_probe_location_serialize returns the | |
1253 | * number of bytes that was appended to the buffer. | |
1254 | */ | |
1255 | ret = lttng_userspace_probe_location_serialize( | |
e368fb43 | 1256 | ev_ext->probe_location, &payload); |
56f0bc67 | 1257 | if (ret < 0) { |
15e37663 JG |
1258 | goto mem_error; |
1259 | } | |
1260 | ||
15e37663 JG |
1261 | /* |
1262 | * Set the size of the userspace probe location element | |
1263 | * of the buffer so that the receiving side knows where | |
1264 | * to split it. | |
1265 | */ | |
1266 | lsm.u.enable.userspace_probe_location_len = ret; | |
1267 | } | |
93deb080 JI |
1268 | } |
1269 | ||
e368fb43 JG |
1270 | { |
1271 | struct lttng_payload_view view = lttng_payload_view_from_payload( | |
1272 | &payload, 0, -1); | |
fe489250 | 1273 | int fd_count = lttng_payload_view_get_fd_handle_count(&view); |
e368fb43 JG |
1274 | int fd_to_send; |
1275 | ||
1276 | if (fd_count < 0) { | |
1277 | goto mem_error; | |
1278 | } | |
1279 | ||
1280 | assert(fd_count == 0 || fd_count == 1); | |
1281 | if (fd_count == 1) { | |
fe489250 JG |
1282 | struct fd_handle *handle = |
1283 | lttng_payload_view_pop_fd_handle(&view); | |
1284 | ||
1285 | if (!handle) { | |
e368fb43 JG |
1286 | goto mem_error; |
1287 | } | |
1288 | ||
fe489250 JG |
1289 | fd_to_send = fd_handle_get_fd(handle); |
1290 | fd_handle_put(handle); | |
e368fb43 JG |
1291 | } |
1292 | ||
1293 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, | |
1294 | fd_count ? &fd_to_send : NULL, fd_count, | |
1295 | view.buffer.size ? view.buffer.data : NULL, | |
1296 | view.buffer.size, NULL, NULL, 0); | |
1297 | } | |
93deb080 | 1298 | |
7ca1dc6f DG |
1299 | mem_error: |
1300 | if (filter_expression && ctx) { | |
93deb080 JI |
1301 | filter_bytecode_free(ctx); |
1302 | filter_ir_free(ctx); | |
1303 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1304 | } |
1305 | filter_error: | |
1306 | if (free_filter_expression) { | |
1307 | /* | |
9ae110e2 JG |
1308 | * The filter expression has been replaced and must be freed as |
1309 | * it is not the original filter expression received as a | |
1310 | * parameter. | |
7ca1dc6f DG |
1311 | */ |
1312 | free(filter_expression); | |
93deb080 | 1313 | } |
137b9942 DG |
1314 | error: |
1315 | /* | |
9ae110e2 JG |
1316 | * Return directly to the caller and don't ask the sessiond since |
1317 | * something went wrong in the parsing of data above. | |
137b9942 | 1318 | */ |
e368fb43 | 1319 | lttng_payload_reset(&payload); |
93deb080 | 1320 | return ret; |
3e1c9ff7 DG |
1321 | |
1322 | ask_sessiond: | |
1323 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1324 | return ret; | |
93deb080 JI |
1325 | } |
1326 | ||
6e911cad MD |
1327 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1328 | struct lttng_event *ev, const char *channel_name, | |
1329 | const char *original_filter_expression) | |
1df4dedd | 1330 | { |
cd80958d | 1331 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1332 | char *varlen_data; |
1333 | int ret = 0; | |
1334 | unsigned int free_filter_expression = 0; | |
1335 | struct filter_parser_ctx *ctx = NULL; | |
1336 | /* | |
1337 | * Cast as non-const since we may replace the filter expression | |
1338 | * by a dynamically allocated string. Otherwise, the original | |
1339 | * string is not modified. | |
1340 | */ | |
1341 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1342 | |
6e911cad MD |
1343 | if (handle == NULL || ev == NULL) { |
1344 | ret = -LTTNG_ERR_INVALID; | |
1345 | goto error; | |
1346 | } | |
1347 | ||
9ae110e2 JG |
1348 | /* |
1349 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1350 | * anyway, so treat this corner-case early to eliminate |
1351 | * lttng_fmemopen error for 0-byte allocation. | |
1352 | */ | |
1353 | if (filter_expression && filter_expression[0] == '\0') { | |
1354 | ret = -LTTNG_ERR_INVALID; | |
1355 | goto error; | |
cd80958d DG |
1356 | } |
1357 | ||
441c16a7 MD |
1358 | memset(&lsm, 0, sizeof(lsm)); |
1359 | ||
85076754 | 1360 | /* If no channel name, send empty string. */ |
e1b624d0 JG |
1361 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", |
1362 | sizeof(lsm.u.disable.channel_name)); | |
1363 | if (ret) { | |
1364 | ret = -LTTNG_ERR_INVALID; | |
1365 | goto error; | |
eb354453 DG |
1366 | } |
1367 | ||
18a720cd | 1368 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1369 | |
60160d2a | 1370 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1371 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1372 | ||
e1b624d0 | 1373 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 1374 | sizeof(lsm.session.name)); |
e1b624d0 JG |
1375 | if (ret) { |
1376 | ret = -LTTNG_ERR_INVALID; | |
1377 | goto error; | |
1378 | } | |
1379 | ||
6e911cad | 1380 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1381 | |
6e911cad MD |
1382 | /* |
1383 | * For the JUL domain, a filter is enforced except for the | |
1384 | * disable all event. This is done to avoid having the event in | |
1385 | * all sessions thus filtering by logger name. | |
1386 | */ | |
1387 | if (filter_expression == NULL && | |
1388 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1389 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1390 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1391 | goto ask_sessiond; |
1392 | } | |
1393 | ||
1394 | /* | |
1395 | * We have a filter, so we need to set up a variable-length | |
1396 | * memory block from where to send the data. | |
1397 | */ | |
1398 | ||
1399 | /* Parse filter expression */ | |
1400 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1401 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1402 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1403 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1404 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1405 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1406 | char *agent_filter; | |
6e911cad MD |
1407 | |
1408 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1409 | agent_filter = set_agent_filter(filter_expression, ev); |
1410 | if (!agent_filter) { | |
6e911cad | 1411 | if (!filter_expression) { |
9ae110e2 JG |
1412 | /* |
1413 | * No JUL and no filter, just skip | |
1414 | * everything below. | |
1415 | */ | |
6e911cad MD |
1416 | goto ask_sessiond; |
1417 | } | |
1418 | } else { | |
1419 | /* | |
9ae110e2 JG |
1420 | * With a JUL filter, the original filter has |
1421 | * been added to it thus replace the filter | |
1422 | * expression. | |
6e911cad | 1423 | */ |
0e115563 | 1424 | filter_expression = agent_filter; |
6e911cad MD |
1425 | free_filter_expression = 1; |
1426 | } | |
1427 | } | |
1428 | ||
e4d2f27a | 1429 | ret = filter_parser_ctx_create_from_filter_expression(filter_expression, &ctx); |
6e911cad MD |
1430 | if (ret) { |
1431 | goto filter_error; | |
1432 | } | |
e4d2f27a JR |
1433 | |
1434 | lsm.u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1435 | + bytecode_get_len(&ctx->bytecode->b); | |
1436 | lsm.u.enable.expression_len = strlen(filter_expression) + 1; | |
6e911cad MD |
1437 | } |
1438 | ||
1439 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1440 | + lsm.u.disable.expression_len); | |
1441 | if (!varlen_data) { | |
1442 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1443 | goto mem_error; | |
1444 | } | |
1445 | ||
9ae110e2 | 1446 | /* Add filter expression. */ |
6e911cad MD |
1447 | if (lsm.u.disable.expression_len != 0) { |
1448 | memcpy(varlen_data, | |
1449 | filter_expression, | |
1450 | lsm.u.disable.expression_len); | |
1451 | } | |
9ae110e2 | 1452 | /* Add filter bytecode next. */ |
6e911cad MD |
1453 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1454 | memcpy(varlen_data | |
1455 | + lsm.u.disable.expression_len, | |
1456 | &ctx->bytecode->b, | |
1457 | lsm.u.disable.bytecode_len); | |
1458 | } | |
1459 | ||
795a978d | 1460 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1461 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1462 | free(varlen_data); | |
1463 | ||
1464 | mem_error: | |
1465 | if (filter_expression && ctx) { | |
1466 | filter_bytecode_free(ctx); | |
1467 | filter_ir_free(ctx); | |
1468 | filter_parser_ctx_free(ctx); | |
1469 | } | |
1470 | filter_error: | |
1471 | if (free_filter_expression) { | |
1472 | /* | |
9ae110e2 JG |
1473 | * The filter expression has been replaced and must be freed as |
1474 | * it is not the original filter expression received as a | |
1475 | * parameter. | |
6e911cad MD |
1476 | */ |
1477 | free(filter_expression); | |
1478 | } | |
1479 | error: | |
1480 | /* | |
9ae110e2 JG |
1481 | * Return directly to the caller and don't ask the sessiond since |
1482 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1483 | */ |
1484 | return ret; | |
1485 | ||
1486 | ask_sessiond: | |
1487 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1488 | return ret; | |
1489 | } | |
1490 | ||
1491 | /* | |
9ae110e2 JG |
1492 | * Disable event(s) of a channel and domain. |
1493 | * If no event name is specified, all events are disabled. | |
1494 | * If no channel name is specified, the default 'channel0' is used. | |
1495 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1496 | */ |
1497 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1498 | const char *channel_name) | |
1499 | { | |
e1b624d0 | 1500 | int ret; |
6e911cad MD |
1501 | struct lttng_event ev; |
1502 | ||
1503 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1504 | ev.loglevel = -1; |
6e911cad | 1505 | ev.type = LTTNG_EVENT_ALL; |
e1b624d0 JG |
1506 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1507 | if (ret) { | |
1508 | ret = -LTTNG_ERR_INVALID; | |
1509 | goto end; | |
1510 | } | |
1511 | ||
1512 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1513 | end: | |
1514 | return ret; | |
1df4dedd DG |
1515 | } |
1516 | ||
cf0bcb51 JG |
1517 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1518 | { | |
1519 | struct lttng_channel *channel = NULL; | |
1520 | struct lttng_channel_extended *extended = NULL; | |
1521 | ||
1522 | if (!domain) { | |
1523 | goto error; | |
1524 | } | |
1525 | ||
1526 | /* Validate domain. */ | |
1527 | switch (domain->type) { | |
1528 | case LTTNG_DOMAIN_UST: | |
1529 | switch (domain->buf_type) { | |
1530 | case LTTNG_BUFFER_PER_UID: | |
1531 | case LTTNG_BUFFER_PER_PID: | |
1532 | break; | |
1533 | default: | |
1534 | goto error; | |
1535 | } | |
1536 | break; | |
1537 | case LTTNG_DOMAIN_KERNEL: | |
1538 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1539 | goto error; | |
1540 | } | |
1541 | break; | |
1542 | default: | |
1543 | goto error; | |
1544 | } | |
1545 | ||
1546 | channel = zmalloc(sizeof(*channel)); | |
1547 | if (!channel) { | |
1548 | goto error; | |
1549 | } | |
1550 | ||
1551 | extended = zmalloc(sizeof(*extended)); | |
1552 | if (!extended) { | |
1553 | goto error; | |
1554 | } | |
1555 | ||
1556 | channel->attr.extended.ptr = extended; | |
1557 | ||
1558 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1559 | return channel; | |
1560 | error: | |
1561 | free(channel); | |
1562 | free(extended); | |
1563 | return NULL; | |
1564 | } | |
1565 | ||
1566 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1567 | { | |
1568 | if (!channel) { | |
1569 | return; | |
1570 | } | |
1571 | ||
1572 | if (channel->attr.extended.ptr) { | |
1573 | free(channel->attr.extended.ptr); | |
1574 | } | |
1575 | free(channel); | |
1576 | } | |
1577 | ||
1df4dedd | 1578 | /* |
9ae110e2 JG |
1579 | * Enable channel per domain |
1580 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1581 | */ |
cd80958d | 1582 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1583 | struct lttng_channel *in_chan) |
a5c5a2bd | 1584 | { |
e1b624d0 | 1585 | int ret; |
cd80958d | 1586 | struct lttcomm_session_msg lsm; |
09b72f7a | 1587 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1588 | |
9ae110e2 | 1589 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1590 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1591 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1592 | } |
1593 | ||
441c16a7 | 1594 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1595 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1596 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1597 | |
cf0bcb51 JG |
1598 | if (!in_chan->attr.extended.ptr) { |
1599 | struct lttng_channel *channel; | |
1600 | struct lttng_channel_extended *extended; | |
7d29a247 | 1601 | |
cf0bcb51 JG |
1602 | channel = lttng_channel_create(&handle->domain); |
1603 | if (!channel) { | |
1604 | return -LTTNG_ERR_NOMEM; | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * Create a new channel in order to use default extended | |
1609 | * attribute values. | |
1610 | */ | |
1611 | extended = (struct lttng_channel_extended *) | |
1612 | channel->attr.extended.ptr; | |
1613 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1614 | lttng_channel_destroy(channel); | |
1615 | } else { | |
1616 | struct lttng_channel_extended *extended; | |
1617 | ||
1618 | extended = (struct lttng_channel_extended *) | |
1619 | in_chan->attr.extended.ptr; | |
1620 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1621 | } | |
cd80958d | 1622 | |
09b72f7a FD |
1623 | /* |
1624 | * Verify that the amount of memory required to create the requested | |
1625 | * buffer is available on the system at the moment. | |
1626 | */ | |
1627 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1628 | lsm.u.channel.chan.attr.subbuf_size; | |
1629 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1630 | return -LTTNG_ERR_NOMEM; | |
1631 | } | |
1632 | ||
cf0bcb51 | 1633 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1634 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1635 | |
e1b624d0 JG |
1636 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1637 | sizeof(lsm.session.name)); | |
1638 | if (ret) { | |
1639 | ret = -LTTNG_ERR_INVALID; | |
1640 | goto end; | |
1641 | } | |
cd80958d | 1642 | |
e1b624d0 JG |
1643 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1644 | end: | |
1645 | return ret; | |
8c0faa1d | 1646 | } |
1df4dedd | 1647 | |
ebdb334b JR |
1648 | enum lttng_error_code lttng_add_map(struct lttng_handle *handle, |
1649 | struct lttng_map *map) | |
1650 | { | |
1651 | ||
1652 | int ret; | |
1653 | enum lttng_error_code ret_code; | |
1654 | struct lttcomm_session_msg lsm = { | |
1655 | .cmd_type = LTTNG_ADD_MAP, | |
1656 | }; | |
1657 | struct lttcomm_session_msg *message_lsm; | |
1658 | struct lttng_payload message; | |
1659 | struct lttng_payload reply; | |
1660 | ||
1661 | lttng_payload_init(&message); | |
1662 | lttng_payload_init(&reply); | |
1663 | ||
1664 | if (!map) { | |
1665 | ret_code = LTTNG_ERR_INVALID; | |
1666 | goto end; | |
1667 | } | |
1668 | ||
1669 | lsm.domain.type = lttng_map_get_domain(map); | |
1670 | ||
1671 | lttng_strncpy(lsm.session.name, handle->session_name, | |
1672 | sizeof(lsm.session.name)); | |
1673 | ||
1674 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
1675 | if (ret) { | |
1676 | ret_code = LTTNG_ERR_NOMEM; | |
1677 | goto end; | |
1678 | } | |
1679 | ||
1680 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
1681 | ||
1682 | ret = lttng_map_serialize(map, &message); | |
1683 | if (ret < 0) { | |
1684 | ret_code = LTTNG_ERR_UNK; | |
1685 | goto end; | |
1686 | } | |
1687 | ||
1688 | message_lsm->u.add_map.length = (uint32_t) message.buffer.size - sizeof(lsm); | |
1689 | ||
1690 | { | |
1691 | struct lttng_payload_view message_view = | |
1692 | lttng_payload_view_from_payload(&message, 0, -1); | |
1693 | ||
1694 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
1695 | &message_view); | |
1696 | ||
1697 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
1698 | if (ret < 0) { | |
1699 | ret_code = ret; | |
1700 | goto end; | |
1701 | } | |
1702 | } | |
1703 | ||
1704 | ret_code = LTTNG_OK; | |
1705 | ||
1706 | end: | |
1707 | lttng_payload_reset(&message); | |
1708 | lttng_payload_reset(&reply); | |
1709 | return ret_code; | |
1710 | } | |
1711 | ||
1712 | enum lttng_error_code lttng_enable_map(struct lttng_handle *handle, | |
1713 | const char *map_name) | |
1714 | { | |
1715 | int ret; | |
1716 | enum lttng_error_code ret_code; | |
1717 | struct lttcomm_session_msg lsm; | |
1718 | struct lttng_payload message; | |
1719 | struct lttng_payload_view lsm_view = | |
1720 | lttng_payload_view_init_from_buffer( | |
1721 | (const char *) &lsm, 0, sizeof(lsm)); | |
1722 | struct lttng_payload reply; | |
1723 | ||
1724 | lttng_payload_init(&message); | |
1725 | lttng_payload_init(&reply); | |
1726 | ||
1727 | memset(&lsm, 0, sizeof(lsm)); | |
1728 | lsm.cmd_type = LTTNG_ENABLE_MAP; | |
1729 | ||
1730 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1731 | ||
1732 | ret = lttng_strncpy(lsm.session.name, handle->session_name, | |
1733 | sizeof(lsm.session.name)); | |
1734 | if (ret) { | |
1735 | ret_code = LTTNG_ERR_INVALID; | |
1736 | goto end; | |
1737 | } | |
1738 | ||
1739 | ret = lttng_strncpy(lsm.u.enable_map.map_name, map_name, | |
1740 | sizeof(lsm.u.enable_map.map_name)); | |
1741 | if (ret) { | |
1742 | ret_code = LTTNG_ERR_INVALID; | |
1743 | goto end; | |
1744 | } | |
1745 | ||
1746 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
1747 | if (ret) { | |
1748 | ret_code = LTTNG_ERR_NOMEM; | |
1749 | goto end; | |
1750 | } | |
1751 | ||
1752 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
1753 | if (ret < 0) { | |
1754 | ret_code = LTTNG_ERR_UNK; | |
1755 | goto end; | |
1756 | } | |
1757 | ||
1758 | ret_code = LTTNG_OK; | |
1759 | ||
1760 | end: | |
1761 | lttng_payload_reset(&message); | |
1762 | lttng_payload_reset(&reply); | |
1763 | return ret_code; | |
1764 | } | |
1765 | ||
1766 | enum lttng_error_code lttng_disable_map(struct lttng_handle *handle, | |
1767 | const char *map_name) | |
1768 | { | |
1769 | int ret; | |
1770 | enum lttng_error_code ret_code; | |
1771 | struct lttcomm_session_msg lsm; | |
1772 | struct lttng_payload message; | |
1773 | struct lttng_payload_view lsm_view = | |
1774 | lttng_payload_view_init_from_buffer( | |
1775 | (const char *) &lsm, 0, sizeof(lsm)); | |
1776 | struct lttng_payload reply; | |
1777 | ||
1778 | lttng_payload_init(&message); | |
1779 | lttng_payload_init(&reply); | |
1780 | ||
1781 | memset(&lsm, 0, sizeof(lsm)); | |
1782 | lsm.cmd_type = LTTNG_DISABLE_MAP; | |
1783 | ||
1784 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
1785 | ||
1786 | ret = lttng_strncpy(lsm.session.name, handle->session_name, | |
1787 | sizeof(lsm.session.name)); | |
1788 | if (ret) { | |
1789 | ret_code = LTTNG_ERR_INVALID; | |
1790 | goto end; | |
1791 | } | |
1792 | ||
1793 | ret = lttng_strncpy(lsm.u.disable_map.map_name, map_name, | |
1794 | sizeof(lsm.u.disable_map.map_name)); | |
1795 | if (ret) { | |
1796 | ret_code = LTTNG_ERR_INVALID; | |
1797 | goto end; | |
1798 | } | |
1799 | ||
1800 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
1801 | if (ret) { | |
1802 | ret_code = LTTNG_ERR_NOMEM; | |
1803 | goto end; | |
1804 | } | |
1805 | ||
1806 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
1807 | if (ret < 0) { | |
1808 | ret_code = LTTNG_ERR_UNK; | |
1809 | goto end; | |
1810 | } | |
1811 | ||
1812 | ret_code = LTTNG_OK; | |
1813 | ||
1814 | end: | |
1815 | lttng_payload_reset(&message); | |
1816 | lttng_payload_reset(&reply); | |
1817 | return ret_code; | |
1818 | } | |
1819 | ||
2ef84c95 | 1820 | /* |
9ae110e2 JG |
1821 | * All tracing will be stopped for registered events of the channel. |
1822 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1823 | */ |
cd80958d | 1824 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1825 | { |
e1b624d0 | 1826 | int ret; |
cd80958d DG |
1827 | struct lttcomm_session_msg lsm; |
1828 | ||
9ae110e2 | 1829 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1830 | if (handle == NULL || name == NULL) { |
2f70b271 | 1831 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1832 | } |
1833 | ||
441c16a7 MD |
1834 | memset(&lsm, 0, sizeof(lsm)); |
1835 | ||
cd80958d | 1836 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1837 | |
e1b624d0 | 1838 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1839 | sizeof(lsm.u.disable.channel_name)); |
e1b624d0 JG |
1840 | if (ret) { |
1841 | ret = -LTTNG_ERR_INVALID; | |
1842 | goto end; | |
1843 | } | |
9d697d3d | 1844 | |
60160d2a | 1845 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1846 | |
e1b624d0 JG |
1847 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1848 | sizeof(lsm.session.name)); | |
1849 | if (ret) { | |
1850 | ret = -LTTNG_ERR_INVALID; | |
1851 | goto end; | |
1852 | } | |
cd80958d | 1853 | |
e1b624d0 JG |
1854 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1855 | end: | |
1856 | return ret; | |
ca95a216 DG |
1857 | } |
1858 | ||
fac6795d | 1859 | /* |
9ae110e2 JG |
1860 | * Lists all available tracepoints of domain. |
1861 | * Sets the contents of the events array. | |
1862 | * Returns the number of lttng_event entries in events; | |
1863 | * on error, returns a negative value. | |
fac6795d | 1864 | */ |
cd80958d | 1865 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1866 | struct lttng_event **events) |
fac6795d | 1867 | { |
052da939 | 1868 | int ret; |
cd80958d DG |
1869 | struct lttcomm_session_msg lsm; |
1870 | ||
9d697d3d | 1871 | if (handle == NULL) { |
2f70b271 | 1872 | return -LTTNG_ERR_INVALID; |
cd80958d | 1873 | } |
fac6795d | 1874 | |
53efb85a | 1875 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1876 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1877 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1878 | |
cac3069d | 1879 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1880 | if (ret < 0) { |
1881 | return ret; | |
eb354453 | 1882 | } |
fac6795d | 1883 | |
9f19cc17 | 1884 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1885 | } |
1886 | ||
f37d259d | 1887 | /* |
9ae110e2 JG |
1888 | * Lists all available tracepoint fields of domain. |
1889 | * Sets the contents of the event field array. | |
1890 | * Returns the number of lttng_event_field entries in events; | |
1891 | * on error, returns a negative value. | |
f37d259d MD |
1892 | */ |
1893 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1894 | struct lttng_event_field **fields) | |
1895 | { | |
1896 | int ret; | |
1897 | struct lttcomm_session_msg lsm; | |
1898 | ||
1899 | if (handle == NULL) { | |
2f70b271 | 1900 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1901 | } |
1902 | ||
53efb85a | 1903 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1904 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1905 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1906 | |
cac3069d | 1907 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1908 | if (ret < 0) { |
1909 | return ret; | |
1910 | } | |
1911 | ||
1912 | return ret / sizeof(struct lttng_event_field); | |
1913 | } | |
1914 | ||
834978fd | 1915 | /* |
9ae110e2 JG |
1916 | * Lists all available kernel system calls. Allocates and sets the contents of |
1917 | * the events array. | |
834978fd | 1918 | * |
9ae110e2 JG |
1919 | * Returns the number of lttng_event entries in events; on error, returns a |
1920 | * negative value. | |
834978fd DG |
1921 | */ |
1922 | int lttng_list_syscalls(struct lttng_event **events) | |
1923 | { | |
1924 | int ret; | |
1925 | struct lttcomm_session_msg lsm; | |
1926 | ||
1927 | if (!events) { | |
1928 | return -LTTNG_ERR_INVALID; | |
1929 | } | |
1930 | ||
1931 | memset(&lsm, 0, sizeof(lsm)); | |
1932 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1933 | /* Force kernel domain for system calls. */ | |
1934 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1935 | ||
1936 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1937 | if (ret < 0) { | |
1938 | return ret; | |
1939 | } | |
1940 | ||
1941 | return ret / sizeof(struct lttng_event); | |
1942 | } | |
1943 | ||
1657e9bb | 1944 | /* |
9ae110e2 JG |
1945 | * Returns a human readable string describing |
1946 | * the error code (a negative value). | |
1657e9bb | 1947 | */ |
9a745bc7 | 1948 | const char *lttng_strerror(int code) |
1657e9bb | 1949 | { |
f73fabfd | 1950 | return error_get_str(code); |
1657e9bb DG |
1951 | } |
1952 | ||
b178f53e JG |
1953 | enum lttng_error_code lttng_create_session_ext( |
1954 | struct lttng_session_descriptor *session_descriptor) | |
1955 | { | |
1956 | enum lttng_error_code ret_code; | |
1957 | struct lttcomm_session_msg lsm = { | |
1958 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1959 | }; | |
1960 | void *reply = NULL; | |
1961 | struct lttng_buffer_view reply_view; | |
1962 | int reply_ret; | |
1963 | bool sessiond_must_generate_ouput; | |
1964 | struct lttng_dynamic_buffer payload; | |
1965 | int ret; | |
1966 | size_t descriptor_size; | |
1967 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1968 | ||
1969 | lttng_dynamic_buffer_init(&payload); | |
1970 | if (!session_descriptor) { | |
1971 | ret_code = LTTNG_ERR_INVALID; | |
1972 | goto end; | |
1973 | } | |
1974 | ||
1975 | sessiond_must_generate_ouput = | |
1976 | !lttng_session_descriptor_is_output_destination_initialized( | |
1977 | session_descriptor); | |
1978 | if (sessiond_must_generate_ouput) { | |
1979 | const char *home_dir = utils_get_home_dir(); | |
1980 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1981 | ||
1982 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1983 | ret_code = LTTNG_ERR_FATAL; | |
1984 | goto end; | |
1985 | } | |
1986 | ||
1987 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1988 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1989 | home_dir_len); | |
1990 | if (ret) { | |
1991 | ret_code = LTTNG_ERR_NOMEM; | |
1992 | goto end; | |
1993 | } | |
1994 | } | |
1995 | ||
1996 | descriptor_size = payload.size; | |
1997 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1998 | &payload); | |
1999 | if (ret) { | |
2000 | ret_code = LTTNG_ERR_INVALID; | |
2001 | goto end; | |
2002 | } | |
2003 | descriptor_size = payload.size - descriptor_size; | |
2004 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
2005 | ||
2006 | /* Command returns a session descriptor on success. */ | |
2007 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
2008 | payload.size, &reply); | |
2009 | if (reply_ret < 0) { | |
2010 | ret_code = -reply_ret; | |
2011 | goto end; | |
2012 | } else if (reply_ret == 0) { | |
2013 | /* Socket unexpectedly closed by the session daemon. */ | |
2014 | ret_code = LTTNG_ERR_FATAL; | |
2015 | goto end; | |
2016 | } | |
2017 | ||
2018 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
2019 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
2020 | &descriptor_reply); | |
2021 | if (ret < 0) { | |
2022 | ret_code = LTTNG_ERR_FATAL; | |
2023 | goto end; | |
2024 | } | |
2025 | ret_code = LTTNG_OK; | |
2026 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
2027 | end: | |
2028 | free(reply); | |
2029 | lttng_dynamic_buffer_reset(&payload); | |
2030 | lttng_session_descriptor_destroy(descriptor_reply); | |
2031 | return ret_code; | |
2032 | } | |
2033 | ||
aaf97519 | 2034 | /* |
b178f53e | 2035 | * Create a new session using name and url for destination. |
a4b92340 | 2036 | * |
780d4bb8 | 2037 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 2038 | */ |
a4b92340 | 2039 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 2040 | { |
3dd05a85 | 2041 | int ret; |
a4b92340 | 2042 | ssize_t size; |
a4b92340 | 2043 | struct lttng_uri *uris = NULL; |
b178f53e JG |
2044 | struct lttng_session_descriptor *descriptor = NULL; |
2045 | enum lttng_error_code ret_code; | |
00e2e675 | 2046 | |
b178f53e JG |
2047 | if (!name) { |
2048 | ret = -LTTNG_ERR_INVALID; | |
2049 | goto end; | |
00e2e675 DG |
2050 | } |
2051 | ||
bc894455 | 2052 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 2053 | if (size < 0) { |
b178f53e JG |
2054 | ret = -LTTNG_ERR_INVALID; |
2055 | goto end; | |
2056 | } | |
2057 | switch (size) { | |
2058 | case 0: | |
2059 | descriptor = lttng_session_descriptor_create(name); | |
2060 | break; | |
2061 | case 1: | |
2062 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
2063 | ret = -LTTNG_ERR_INVALID; | |
2064 | goto end; | |
2065 | } | |
2066 | descriptor = lttng_session_descriptor_local_create(name, | |
2067 | uris[0].dst.path); | |
2068 | break; | |
2069 | case 2: | |
2070 | descriptor = lttng_session_descriptor_network_create(name, url, | |
2071 | NULL); | |
2072 | break; | |
2073 | default: | |
2074 | ret = -LTTNG_ERR_INVALID; | |
2075 | goto end; | |
2076 | } | |
2077 | if (!descriptor) { | |
2078 | ret = -LTTNG_ERR_INVALID; | |
2079 | goto end; | |
00e2e675 | 2080 | } |
b178f53e JG |
2081 | ret_code = lttng_create_session_ext(descriptor); |
2082 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2083 | end: | |
2084 | lttng_session_descriptor_destroy(descriptor); | |
2085 | free(uris); | |
2086 | return ret; | |
2087 | } | |
00e2e675 | 2088 | |
b178f53e JG |
2089 | /* |
2090 | * Create a session exclusively used for snapshot. | |
2091 | * | |
780d4bb8 | 2092 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2093 | */ |
2094 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
2095 | { | |
2096 | int ret; | |
2097 | enum lttng_error_code ret_code; | |
2098 | ssize_t size; | |
2099 | struct lttng_uri *uris = NULL; | |
2100 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 2101 | |
b178f53e JG |
2102 | if (!name) { |
2103 | ret = -LTTNG_ERR_INVALID; | |
2104 | goto end; | |
2105 | } | |
2106 | ||
2107 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
2108 | if (size < 0) { | |
2109 | ret = -LTTNG_ERR_INVALID; | |
2110 | goto end; | |
2111 | } | |
2112 | /* | |
2113 | * If the user does not specify a custom subdir, use the session name. | |
2114 | */ | |
2115 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
2116 | strlen(uris[0].subdir) == 0) { | |
2117 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
2118 | name); | |
2119 | if (ret < 0) { | |
2120 | PERROR("Failed to set session name as network destination sub-directory"); | |
2121 | ret = -LTTNG_ERR_FATAL; | |
2122 | goto end; | |
2123 | } else if (ret >= sizeof(uris[0].subdir)) { | |
2124 | /* Truncated output. */ | |
2125 | ret = -LTTNG_ERR_INVALID; | |
2126 | goto end; | |
2127 | } | |
2128 | } | |
3dd05a85 | 2129 | |
b178f53e JG |
2130 | switch (size) { |
2131 | case 0: | |
2132 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
2133 | break; | |
2134 | case 1: | |
2135 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
2136 | ret = -LTTNG_ERR_INVALID; | |
2137 | goto end; | |
2138 | } | |
2139 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
2140 | name, | |
2141 | uris[0].dst.path); | |
2142 | break; | |
2143 | case 2: | |
2144 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
2145 | name, | |
2146 | snapshot_url, | |
2147 | NULL); | |
2148 | break; | |
2149 | default: | |
2150 | ret = -LTTNG_ERR_INVALID; | |
2151 | goto end; | |
2152 | } | |
2153 | if (!descriptor) { | |
2154 | ret = -LTTNG_ERR_INVALID; | |
2155 | goto end; | |
2156 | } | |
2157 | ret_code = lttng_create_session_ext(descriptor); | |
2158 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2159 | end: | |
2160 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
2161 | free(uris); |
2162 | return ret; | |
00e2e675 DG |
2163 | } |
2164 | ||
b178f53e JG |
2165 | /* |
2166 | * Create a session exclusively used for live. | |
2167 | * | |
780d4bb8 | 2168 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2169 | */ |
2170 | int lttng_create_session_live(const char *name, const char *url, | |
2171 | unsigned int timer_interval) | |
2172 | { | |
2173 | int ret; | |
2174 | enum lttng_error_code ret_code; | |
2175 | struct lttng_session_descriptor *descriptor = NULL; | |
2176 | ||
2177 | if (!name) { | |
2178 | ret = -LTTNG_ERR_INVALID; | |
2179 | goto end; | |
2180 | } | |
2181 | ||
2182 | if (url) { | |
2183 | descriptor = lttng_session_descriptor_live_network_create( | |
2184 | name, url, NULL, timer_interval); | |
2185 | } else { | |
2186 | descriptor = lttng_session_descriptor_live_create( | |
2187 | name, timer_interval); | |
2188 | } | |
2189 | if (!descriptor) { | |
2190 | ret = -LTTNG_ERR_INVALID; | |
2191 | goto end; | |
2192 | } | |
2193 | ret_code = lttng_create_session_ext(descriptor); | |
2194 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2195 | end: | |
2196 | lttng_session_descriptor_destroy(descriptor); | |
2197 | return ret; | |
2198 | } | |
2199 | ||
e20ee7c2 JD |
2200 | /* |
2201 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2202 | * |
2203 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2204 | */ |
2205 | int lttng_destroy_session(const char *session_name) | |
2206 | { | |
2207 | int ret; | |
3e3665b8 JG |
2208 | enum lttng_error_code ret_code; |
2209 | enum lttng_destruction_handle_status status; | |
2210 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2211 | |
2212 | /* | |
3e3665b8 JG |
2213 | * Stop the tracing and wait for the data to be |
2214 | * consumed. | |
e20ee7c2 JD |
2215 | */ |
2216 | ret = _lttng_stop_tracing(session_name, 1); | |
2217 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2218 | goto end; | |
2219 | } | |
2220 | ||
3e3665b8 JG |
2221 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2222 | if (ret_code != LTTNG_OK) { | |
2223 | ret = (int) -ret_code; | |
2224 | goto end; | |
2225 | } | |
2226 | assert(handle); | |
2227 | ||
2228 | /* Block until the completion of the destruction of the session. */ | |
2229 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2230 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2231 | ret = -LTTNG_ERR_UNK; | |
2232 | goto end; | |
2233 | } | |
2234 | ||
2235 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2236 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2237 | ret = -LTTNG_ERR_UNK; | |
2238 | goto end; | |
2239 | } | |
780d4bb8 | 2240 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2241 | end: |
3e3665b8 | 2242 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2243 | return ret; |
2244 | } | |
2245 | ||
2246 | /* | |
2247 | * Destroy the session without waiting for the data. | |
2248 | */ | |
2249 | int lttng_destroy_session_no_wait(const char *session_name) | |
2250 | { | |
3e3665b8 | 2251 | enum lttng_error_code ret_code; |
e20ee7c2 | 2252 | |
3e3665b8 JG |
2253 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
2254 | return ret_code == LTTNG_OK ? ret_code : -ret_code; | |
e20ee7c2 JD |
2255 | } |
2256 | ||
57167058 | 2257 | /* |
9ae110e2 JG |
2258 | * Ask the session daemon for all available sessions. |
2259 | * Sets the contents of the sessions array. | |
2260 | * Returns the number of lttng_session entries in sessions; | |
2261 | * on error, returns a negative value. | |
57167058 | 2262 | */ |
b178f53e | 2263 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2264 | { |
ca95a216 | 2265 | int ret; |
cd80958d | 2266 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2267 | const size_t session_size = sizeof(struct lttng_session) + |
2268 | sizeof(struct lttng_session_extended); | |
2269 | size_t session_count, i; | |
2270 | struct lttng_session_extended *sessions_extended_begin; | |
2271 | struct lttng_session *sessions = NULL; | |
57167058 | 2272 | |
53efb85a | 2273 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2274 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
b178f53e JG |
2275 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2276 | if (ret <= 0) { | |
b178f53e JG |
2277 | goto end; |
2278 | } | |
2279 | if (!sessions) { | |
2280 | ret = -LTTNG_ERR_FATAL; | |
2281 | goto end; | |
2282 | } | |
2283 | ||
2284 | if (ret % session_size) { | |
2285 | ret = -LTTNG_ERR_UNK; | |
2286 | free(sessions); | |
2287 | *out_sessions = NULL; | |
2288 | goto end; | |
57167058 | 2289 | } |
b178f53e JG |
2290 | session_count = (size_t) ret / session_size; |
2291 | sessions_extended_begin = (struct lttng_session_extended *) | |
2292 | (&sessions[session_count]); | |
57167058 | 2293 | |
b178f53e JG |
2294 | /* Set extended session info pointers. */ |
2295 | for (i = 0; i < session_count; i++) { | |
2296 | struct lttng_session *session = &sessions[i]; | |
2297 | struct lttng_session_extended *extended = | |
2298 | &(sessions_extended_begin[i]); | |
2299 | ||
2300 | session->extended.ptr = extended; | |
2301 | } | |
2302 | ||
2303 | ret = (int) session_count; | |
2304 | *out_sessions = sessions; | |
2305 | end: | |
2306 | return ret; | |
2307 | } | |
2308 | ||
2309 | enum lttng_error_code lttng_session_get_creation_time( | |
2310 | const struct lttng_session *session, uint64_t *creation_time) | |
2311 | { | |
2312 | enum lttng_error_code ret = LTTNG_OK; | |
2313 | struct lttng_session_extended *extended; | |
2314 | ||
2315 | if (!session || !creation_time || !session->extended.ptr) { | |
2316 | ret = LTTNG_ERR_INVALID; | |
2317 | goto end; | |
2318 | } | |
2319 | ||
2320 | extended = session->extended.ptr; | |
2321 | if (!extended->creation_time.is_set) { | |
2322 | /* Not created on the session daemon yet. */ | |
2323 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2324 | goto end; | |
2325 | } | |
2326 | *creation_time = extended->creation_time.value; | |
2327 | end: | |
2328 | return ret; | |
57167058 DG |
2329 | } |
2330 | ||
d7ba1388 MD |
2331 | int lttng_set_session_shm_path(const char *session_name, |
2332 | const char *shm_path) | |
2333 | { | |
e1b624d0 | 2334 | int ret; |
d7ba1388 MD |
2335 | struct lttcomm_session_msg lsm; |
2336 | ||
2337 | if (session_name == NULL) { | |
2338 | return -LTTNG_ERR_INVALID; | |
2339 | } | |
2340 | ||
2341 | memset(&lsm, 0, sizeof(lsm)); | |
2342 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2343 | ||
e1b624d0 | 2344 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2345 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2346 | if (ret) { |
2347 | ret = -LTTNG_ERR_INVALID; | |
2348 | goto end; | |
2349 | } | |
2350 | ||
2351 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2352 | sizeof(lsm.u.set_shm_path.shm_path)); |
e1b624d0 JG |
2353 | if (ret) { |
2354 | ret = -LTTNG_ERR_INVALID; | |
2355 | goto end; | |
2356 | } | |
d7ba1388 | 2357 | |
e1b624d0 JG |
2358 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2359 | end: | |
2360 | return ret; | |
d7ba1388 MD |
2361 | } |
2362 | ||
9f19cc17 | 2363 | /* |
9ae110e2 JG |
2364 | * Ask the session daemon for all available domains of a session. |
2365 | * Sets the contents of the domains array. | |
2366 | * Returns the number of lttng_domain entries in domains; | |
2367 | * on error, returns a negative value. | |
9f19cc17 | 2368 | */ |
330be774 | 2369 | int lttng_list_domains(const char *session_name, |
cd80958d | 2370 | struct lttng_domain **domains) |
9f19cc17 DG |
2371 | { |
2372 | int ret; | |
cd80958d DG |
2373 | struct lttcomm_session_msg lsm; |
2374 | ||
330be774 | 2375 | if (session_name == NULL) { |
e1b624d0 JG |
2376 | ret = -LTTNG_ERR_INVALID; |
2377 | goto error; | |
cd80958d | 2378 | } |
9f19cc17 | 2379 | |
53efb85a | 2380 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2381 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2382 | ||
e1b624d0 | 2383 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2384 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2385 | if (ret) { |
2386 | ret = -LTTNG_ERR_INVALID; | |
2387 | goto error; | |
2388 | } | |
cd80958d | 2389 | |
cac3069d | 2390 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2391 | if (ret < 0) { |
e1b624d0 | 2392 | goto error; |
9f19cc17 DG |
2393 | } |
2394 | ||
2395 | return ret / sizeof(struct lttng_domain); | |
e1b624d0 JG |
2396 | error: |
2397 | return ret; | |
9f19cc17 DG |
2398 | } |
2399 | ||
2400 | /* | |
9ae110e2 JG |
2401 | * Ask the session daemon for all available channels of a session. |
2402 | * Sets the contents of the channels array. | |
2403 | * Returns the number of lttng_channel entries in channels; | |
2404 | * on error, returns a negative value. | |
9f19cc17 | 2405 | */ |
cd80958d DG |
2406 | int lttng_list_channels(struct lttng_handle *handle, |
2407 | struct lttng_channel **channels) | |
9f19cc17 DG |
2408 | { |
2409 | int ret; | |
53e367f9 JG |
2410 | size_t channel_count, i; |
2411 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2412 | sizeof(struct lttng_channel_extended); |
cd80958d | 2413 | struct lttcomm_session_msg lsm; |
53e367f9 | 2414 | void *extended_at; |
cd80958d | 2415 | |
9d697d3d | 2416 | if (handle == NULL) { |
53e367f9 JG |
2417 | ret = -LTTNG_ERR_INVALID; |
2418 | goto end; | |
cd80958d DG |
2419 | } |
2420 | ||
53efb85a | 2421 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2422 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
e1b624d0 | 2423 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2424 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2425 | if (ret) { |
2426 | ret = -LTTNG_ERR_INVALID; | |
2427 | goto end; | |
2428 | } | |
9f19cc17 | 2429 | |
60160d2a | 2430 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2431 | |
cac3069d | 2432 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2433 | if (ret < 0) { |
53e367f9 JG |
2434 | goto end; |
2435 | } | |
2436 | ||
2437 | if (ret % channel_size) { | |
2438 | ret = -LTTNG_ERR_UNK; | |
2439 | free(*channels); | |
2440 | *channels = NULL; | |
2441 | goto end; | |
9f19cc17 | 2442 | } |
53e367f9 | 2443 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2444 | |
53e367f9 JG |
2445 | /* Set extended info pointers */ |
2446 | extended_at = ((void *) *channels) + | |
2447 | channel_count * sizeof(struct lttng_channel); | |
2448 | for (i = 0; i < channel_count; i++) { | |
2449 | struct lttng_channel *chan = &(*channels)[i]; | |
2450 | ||
2451 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2452 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2453 | } |
2454 | ||
2455 | ret = (int) channel_count; | |
2456 | end: | |
2457 | return ret; | |
9f19cc17 DG |
2458 | } |
2459 | ||
ebdb334b JR |
2460 | enum lttng_error_code lttng_list_maps(struct lttng_handle *handle, |
2461 | struct lttng_map_list **map_list) | |
2462 | { | |
2463 | int ret; | |
2464 | enum lttng_error_code ret_code = LTTNG_OK; | |
2465 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_MAPS }; | |
2466 | struct lttng_map_list *local_map_list = NULL; | |
2467 | struct lttng_payload reply; | |
2468 | struct lttng_payload_view lsm_view = | |
2469 | lttng_payload_view_init_from_buffer( | |
2470 | (const char *) &lsm, 0, sizeof(lsm)); | |
2471 | ||
2472 | lttng_payload_init(&reply); | |
2473 | ||
2474 | if (handle == NULL) { | |
2475 | ret = -LTTNG_ERR_INVALID; | |
2476 | goto end; | |
2477 | } | |
2478 | ||
2479 | ret = lttng_strncpy(lsm.session.name, handle->session_name, | |
2480 | sizeof(lsm.session.name)); | |
2481 | if (ret) { | |
2482 | ret = -LTTNG_ERR_INVALID; | |
2483 | goto end; | |
2484 | } | |
2485 | ||
2486 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
2487 | ||
2488 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
2489 | if (ret < 0) { | |
2490 | ret_code = (enum lttng_error_code) -ret; | |
2491 | goto end; | |
2492 | } | |
2493 | ||
2494 | { | |
2495 | struct lttng_payload_view reply_view = | |
2496 | lttng_payload_view_from_payload( | |
2497 | &reply, 0, reply.buffer.size); | |
2498 | ||
2499 | ret = lttng_map_list_create_from_payload( | |
2500 | &reply_view, &local_map_list); | |
2501 | if (ret < 0) { | |
2502 | ret_code = LTTNG_ERR_FATAL; | |
2503 | goto end; | |
2504 | } | |
2505 | } | |
2506 | ||
2507 | *map_list = local_map_list; | |
2508 | local_map_list = NULL; | |
2509 | end: | |
2510 | lttng_payload_reset(&reply); | |
2511 | lttng_map_list_destroy(local_map_list); | |
2512 | return ret_code; | |
2513 | } | |
2514 | ||
9f19cc17 | 2515 | /* |
9ae110e2 JG |
2516 | * Ask the session daemon for all available events of a session channel. |
2517 | * Sets the contents of the events array. | |
2518 | * Returns the number of lttng_event entries in events; | |
2519 | * on error, returns a negative value. | |
9f19cc17 | 2520 | */ |
cd80958d DG |
2521 | int lttng_list_events(struct lttng_handle *handle, |
2522 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2523 | { |
2524 | int ret; | |
e368fb43 JG |
2525 | struct lttcomm_session_msg lsm = {}; |
2526 | const struct lttcomm_event_command_header *cmd_header = NULL; | |
b4e3ceb9 | 2527 | uint32_t nb_events, i; |
e368fb43 | 2528 | const void *comm_ext_at; |
56f0bc67 | 2529 | struct lttng_dynamic_buffer listing; |
de453daa | 2530 | size_t storage_req; |
e368fb43 JG |
2531 | struct lttng_payload payload; |
2532 | struct lttng_payload payload_copy; | |
2533 | struct lttng_payload_view lsm_view = | |
2534 | lttng_payload_view_init_from_buffer( | |
2535 | (const char *) &lsm, 0, sizeof(lsm)); | |
2536 | struct lttng_buffer_view cmd_header_view; | |
2537 | struct lttng_buffer_view cmd_payload_view; | |
2538 | struct lttng_buffer_view flat_events_view; | |
2539 | struct lttng_buffer_view ext_view; | |
9f19cc17 | 2540 | |
9d697d3d DG |
2541 | /* Safety check. An handle and channel name are mandatory */ |
2542 | if (handle == NULL || channel_name == NULL) { | |
e368fb43 JG |
2543 | ret = -LTTNG_ERR_INVALID; |
2544 | goto end; | |
cd80958d DG |
2545 | } |
2546 | ||
e368fb43 JG |
2547 | lttng_payload_init(&payload); |
2548 | lttng_payload_init(&payload_copy); | |
2549 | ||
cd80958d | 2550 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
e1b624d0 | 2551 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2552 | sizeof(lsm.session.name)); |
e1b624d0 JG |
2553 | if (ret) { |
2554 | ret = -LTTNG_ERR_INVALID; | |
2555 | goto end; | |
2556 | } | |
2557 | ||
2558 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2559 | sizeof(lsm.u.list.channel_name)); |
e1b624d0 JG |
2560 | if (ret) { |
2561 | ret = -LTTNG_ERR_INVALID; | |
2562 | goto end; | |
2563 | } | |
2564 | ||
60160d2a | 2565 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2566 | |
e368fb43 | 2567 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &payload); |
9f19cc17 | 2568 | if (ret < 0) { |
de453daa | 2569 | goto end; |
9f19cc17 DG |
2570 | } |
2571 | ||
e368fb43 JG |
2572 | /* |
2573 | * A copy of the payload is performed since it will be | |
2574 | * consumed twice. Consuming the same payload twice is invalid since | |
2575 | * it will cause any received file descriptor to become "shared" | |
2576 | * between different instances of the resulting objects. | |
2577 | */ | |
2578 | ret = lttng_payload_copy(&payload, &payload_copy); | |
2579 | if (ret) { | |
2580 | ret = -LTTNG_ERR_NOMEM; | |
2581 | goto end; | |
2582 | } | |
2583 | ||
2584 | cmd_header_view = lttng_buffer_view_from_dynamic_buffer( | |
2585 | &payload.buffer, 0, sizeof(*cmd_header)); | |
3e6e0df2 | 2586 | if (!lttng_buffer_view_is_valid(&cmd_header_view)) { |
e368fb43 | 2587 | ret = -LTTNG_ERR_INVALID_PROTOCOL; |
d9f484bc JG |
2588 | goto end; |
2589 | } | |
2590 | ||
e368fb43 JG |
2591 | cmd_header = (typeof(cmd_header)) cmd_header_view.data; |
2592 | ||
b4e3ceb9 PP |
2593 | /* Set number of events and free command header */ |
2594 | nb_events = cmd_header->nb_events; | |
2595 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2596 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2597 | goto end; |
b4e3ceb9 | 2598 | } |
e368fb43 JG |
2599 | |
2600 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( | |
2601 | &payload.buffer, sizeof(*cmd_header), -1); | |
b4e3ceb9 | 2602 | |
de453daa JG |
2603 | /* |
2604 | * The buffer that is returned must contain a "flat" version of | |
2605 | * the events that are returned. In other words, all pointers | |
2606 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2607 | * buffer so that the user may free everything by simply calling free() |
2608 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2609 | * compatibility. |
2610 | * | |
56f0bc67 JG |
2611 | * A first pass is performed to compute the size of the buffer that |
2612 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2613 | * the returned events so that their members always point within the |
2614 | * buffer. | |
2615 | * | |
2616 | * The layout of the returned buffer is as follows: | |
2617 | * - struct lttng_event[nb_events], | |
2618 | * - nb_events times the following: | |
2619 | * - struct lttng_event_extended, | |
2620 | * - flattened version of userspace_probe_location | |
2621 | * - filter_expression | |
2622 | * - exclusions | |
2623 | * - padding to align to 64-bits | |
2624 | */ | |
e368fb43 JG |
2625 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2626 | nb_events * sizeof(struct lttng_event), -1); | |
2627 | comm_ext_at = ext_view.data; | |
de453daa | 2628 | storage_req = nb_events * sizeof(struct lttng_event); |
e368fb43 JG |
2629 | { |
2630 | struct lttng_payload_view payload_view = | |
2631 | lttng_payload_view_from_payload(&payload, 0, -1); | |
b4e3ceb9 | 2632 | |
e368fb43 JG |
2633 | for (i = 0; i < nb_events; i++) { |
2634 | const struct lttcomm_event_extended_header *ext_comm = | |
2635 | (struct lttcomm_event_extended_header *) | |
2636 | comm_ext_at; | |
2637 | int probe_storage_req = 0; | |
b4e3ceb9 | 2638 | |
e368fb43 JG |
2639 | comm_ext_at += sizeof(*ext_comm); |
2640 | comm_ext_at += ext_comm->filter_len; | |
2641 | comm_ext_at += ext_comm->nb_exclusions * | |
2642 | LTTNG_SYMBOL_NAME_LEN; | |
2643 | ||
2644 | if (ext_comm->userspace_probe_location_len) { | |
2645 | struct lttng_userspace_probe_location | |
2646 | *probe_location = NULL; | |
2647 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2648 | &payload_view, | |
2649 | (const char *) comm_ext_at - | |
2650 | payload_view.buffer.data, | |
2651 | ext_comm->userspace_probe_location_len); | |
56f0bc67 | 2652 | |
3e6e0df2 JG |
2653 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2654 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2655 | goto end; | |
2656 | } | |
2657 | ||
e368fb43 JG |
2658 | /* |
2659 | * Create a temporary userspace probe location | |
2660 | * to determine the size needed by a "flattened" | |
2661 | * version of that same probe location. | |
2662 | */ | |
2663 | ret = lttng_userspace_probe_location_create_from_payload( | |
2664 | &probe_location_view, | |
2665 | &probe_location); | |
2666 | if (ret < 0) { | |
2667 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2668 | goto end; | |
2669 | } | |
56f0bc67 | 2670 | |
e368fb43 JG |
2671 | ret = lttng_userspace_probe_location_flatten( |
2672 | probe_location, NULL); | |
2673 | lttng_userspace_probe_location_destroy( | |
2674 | probe_location); | |
2675 | if (ret < 0) { | |
2676 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2677 | goto end; | |
2678 | } | |
56f0bc67 | 2679 | |
e368fb43 JG |
2680 | probe_storage_req = ret; |
2681 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2682 | } |
2683 | ||
e368fb43 JG |
2684 | storage_req += sizeof(struct lttng_event_extended); |
2685 | storage_req += ext_comm->filter_len; | |
2686 | storage_req += ext_comm->nb_exclusions * | |
2687 | LTTNG_SYMBOL_NAME_LEN; | |
2688 | /* Padding to ensure the flat probe is aligned. */ | |
2689 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2690 | storage_req += probe_storage_req; | |
56f0bc67 | 2691 | } |
b4e3ceb9 PP |
2692 | } |
2693 | ||
56f0bc67 JG |
2694 | lttng_dynamic_buffer_init(&listing); |
2695 | /* | |
2696 | * We must ensure that "listing" is never resized so as to preserve | |
2697 | * the validity of the flattened objects. | |
2698 | */ | |
2699 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2700 | if (ret) { | |
2701 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2702 | goto end; |
2703 | } | |
56f0bc67 | 2704 | |
e368fb43 JG |
2705 | cmd_payload_view = lttng_buffer_view_from_dynamic_buffer( |
2706 | &payload_copy.buffer, sizeof(*cmd_header), -1); | |
2707 | flat_events_view = lttng_buffer_view_from_view(&cmd_payload_view, 0, | |
56f0bc67 | 2708 | nb_events * sizeof(struct lttng_event)); |
e368fb43 | 2709 | ret = lttng_dynamic_buffer_append_view(&listing, &flat_events_view); |
56f0bc67 JG |
2710 | if (ret) { |
2711 | ret = -LTTNG_ERR_NOMEM; | |
2712 | goto free_dynamic_buffer; | |
2713 | } | |
de453daa | 2714 | |
e368fb43 JG |
2715 | ext_view = lttng_buffer_view_from_view(&cmd_payload_view, |
2716 | nb_events * sizeof(struct lttng_event), -1); | |
2717 | comm_ext_at = ext_view.data; | |
2718 | ||
2719 | { | |
2720 | struct lttng_payload_view payload_copy_view = | |
2721 | lttng_payload_view_from_payload( | |
2722 | &payload_copy, 0, -1); | |
2723 | ||
2724 | for (i = 0; i < nb_events; i++) { | |
2725 | struct lttng_event *event = (typeof(event))( | |
2726 | listing.data + | |
2727 | (sizeof(struct lttng_event) * i)); | |
2728 | const struct lttcomm_event_extended_header *ext_comm = | |
2729 | (typeof(ext_comm)) comm_ext_at; | |
2730 | struct lttng_event_extended *event_extended = | |
2731 | (typeof(event_extended))(listing.data + | |
2732 | listing.size); | |
2733 | ||
2734 | /* Insert struct lttng_event_extended. */ | |
2735 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2736 | listing.size + sizeof(*event_extended)); | |
56f0bc67 JG |
2737 | if (ret) { |
2738 | ret = -LTTNG_ERR_NOMEM; | |
2739 | goto free_dynamic_buffer; | |
2740 | } | |
e368fb43 JG |
2741 | event->extended.ptr = event_extended; |
2742 | ||
2743 | comm_ext_at += sizeof(*ext_comm); | |
2744 | ||
2745 | /* Insert filter expression. */ | |
2746 | if (ext_comm->filter_len) { | |
2747 | event_extended->filter_expression = | |
2748 | listing.data + listing.size; | |
2749 | ret = lttng_dynamic_buffer_append(&listing, | |
2750 | comm_ext_at, | |
2751 | ext_comm->filter_len); | |
2752 | if (ret) { | |
2753 | ret = -LTTNG_ERR_NOMEM; | |
2754 | goto free_dynamic_buffer; | |
2755 | } | |
2756 | comm_ext_at += ext_comm->filter_len; | |
2757 | } | |
56f0bc67 | 2758 | |
e368fb43 JG |
2759 | /* Insert exclusions. */ |
2760 | if (ext_comm->nb_exclusions) { | |
2761 | event_extended->exclusions.count = | |
2762 | ext_comm->nb_exclusions; | |
2763 | event_extended->exclusions.strings = | |
2764 | listing.data + listing.size; | |
2765 | ||
2766 | ret = lttng_dynamic_buffer_append(&listing, | |
2767 | comm_ext_at, | |
2768 | ext_comm->nb_exclusions * | |
2769 | LTTNG_SYMBOL_NAME_LEN); | |
2770 | if (ret) { | |
2771 | ret = -LTTNG_ERR_NOMEM; | |
2772 | goto free_dynamic_buffer; | |
2773 | } | |
2774 | comm_ext_at += ext_comm->nb_exclusions * | |
2775 | LTTNG_SYMBOL_NAME_LEN; | |
2776 | } | |
56f0bc67 | 2777 | |
e368fb43 JG |
2778 | /* Insert padding to align to 64-bits. */ |
2779 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2780 | ALIGN_TO(listing.size, | |
2781 | sizeof(uint64_t))); | |
56f0bc67 JG |
2782 | if (ret) { |
2783 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2784 | goto free_dynamic_buffer; |
56f0bc67 | 2785 | } |
56f0bc67 | 2786 | |
e368fb43 JG |
2787 | /* Insert flattened userspace probe location. */ |
2788 | if (ext_comm->userspace_probe_location_len) { | |
2789 | struct lttng_userspace_probe_location | |
2790 | *probe_location = NULL; | |
2791 | struct lttng_payload_view probe_location_view = lttng_payload_view_from_view( | |
2792 | &payload_copy_view, | |
2793 | (const char *) comm_ext_at - | |
2794 | payload_copy_view.buffer.data, | |
2795 | ext_comm->userspace_probe_location_len); | |
2796 | ||
3e6e0df2 JG |
2797 | if (!lttng_payload_view_is_valid(&probe_location_view)) { |
2798 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2799 | goto free_dynamic_buffer; | |
2800 | } | |
2801 | ||
e368fb43 JG |
2802 | ret = lttng_userspace_probe_location_create_from_payload( |
2803 | &probe_location_view, | |
2804 | &probe_location); | |
2805 | if (ret < 0) { | |
2806 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2807 | goto free_dynamic_buffer; | |
2808 | } | |
de453daa | 2809 | |
e368fb43 JG |
2810 | event_extended->probe_location = (struct lttng_userspace_probe_location |
2811 | *) (listing.data + | |
2812 | listing.size); | |
2813 | ret = lttng_userspace_probe_location_flatten( | |
2814 | probe_location, &listing); | |
2815 | lttng_userspace_probe_location_destroy( | |
2816 | probe_location); | |
2817 | if (ret < 0) { | |
2818 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2819 | goto free_dynamic_buffer; | |
2820 | } | |
56f0bc67 | 2821 | |
e368fb43 | 2822 | comm_ext_at += ext_comm->userspace_probe_location_len; |
56f0bc67 | 2823 | } |
56f0bc67 | 2824 | } |
de453daa JG |
2825 | } |
2826 | ||
56f0bc67 JG |
2827 | /* Don't reset listing buffer as we return its content. */ |
2828 | *events = (struct lttng_event *) listing.data; | |
2829 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2830 | ret = (int) nb_events; |
56f0bc67 JG |
2831 | free_dynamic_buffer: |
2832 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2833 | end: |
e368fb43 JG |
2834 | lttng_payload_reset(&payload); |
2835 | lttng_payload_reset(&payload_copy); | |
b4e3ceb9 | 2836 | return ret; |
9f19cc17 DG |
2837 | } |
2838 | ||
fac6795d | 2839 | /* |
1c8d13c8 TD |
2840 | * Sets the tracing_group variable with name. |
2841 | * This function allocates memory pointed to by tracing_group. | |
2842 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2843 | */ |
2844 | int lttng_set_tracing_group(const char *name) | |
2845 | { | |
9d697d3d | 2846 | if (name == NULL) { |
2f70b271 | 2847 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2848 | } |
2849 | ||
fac6795d | 2850 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2851 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2852 | } |
2853 | ||
2854 | return 0; | |
2855 | } | |
2856 | ||
cd80958d | 2857 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2858 | struct lttng_calibrate *calibrate) |
2859 | { | |
b812e5ca PP |
2860 | /* |
2861 | * This command was removed in LTTng 2.9. | |
2862 | */ | |
2863 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2864 | } |
2865 | ||
5edd7e09 DG |
2866 | /* |
2867 | * Set default channel attributes. | |
441c16a7 | 2868 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2869 | */ |
2870 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2871 | struct lttng_channel_attr *attr) | |
2872 | { | |
294851b0 | 2873 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2874 | |
5edd7e09 DG |
2875 | /* Safety check */ |
2876 | if (attr == NULL || domain == NULL) { | |
2877 | return; | |
2878 | } | |
2879 | ||
294851b0 | 2880 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2881 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2882 | ||
0a9c6494 DG |
2883 | /* Same for all domains. */ |
2884 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2885 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2886 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2887 | ||
5edd7e09 DG |
2888 | switch (domain->type) { |
2889 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2890 | attr->switch_timer_interval = |
2891 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2892 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2893 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2894 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2895 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2896 | if (extended) { |
2897 | extended->monitor_timer_interval = | |
2898 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2899 | extended->blocking_timeout = |
2900 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2901 | } |
5edd7e09 DG |
2902 | break; |
2903 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2904 | switch (domain->buf_type) { |
2905 | case LTTNG_BUFFER_PER_UID: | |
2906 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2907 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2908 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2909 | attr->switch_timer_interval = |
2910 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2911 | attr->read_timer_interval = | |
2912 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2913 | if (extended) { |
2914 | extended->monitor_timer_interval = | |
2915 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2916 | extended->blocking_timeout = |
2917 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2918 | } |
0a9c6494 DG |
2919 | break; |
2920 | case LTTNG_BUFFER_PER_PID: | |
2921 | default: | |
2922 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2923 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2924 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2925 | attr->switch_timer_interval = |
2926 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2927 | attr->read_timer_interval = | |
2928 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2929 | if (extended) { |
2930 | extended->monitor_timer_interval = | |
2931 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2932 | extended->blocking_timeout = |
2933 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2934 | } |
0a9c6494 DG |
2935 | break; |
2936 | } | |
5edd7e09 | 2937 | default: |
441c16a7 | 2938 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2939 | break; |
2940 | } | |
cf0bcb51 JG |
2941 | |
2942 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2943 | } |
2944 | ||
5ba3702f JG |
2945 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2946 | uint64_t *discarded_events) | |
2947 | { | |
2948 | int ret = 0; | |
cf0bcb51 | 2949 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2950 | |
2951 | if (!channel || !discarded_events) { | |
2952 | ret = -LTTNG_ERR_INVALID; | |
2953 | goto end; | |
2954 | } | |
2955 | ||
2956 | chan_ext = channel->attr.extended.ptr; | |
2957 | if (!chan_ext) { | |
2958 | /* | |
2959 | * This can happen since the lttng_channel structure is | |
2960 | * used for other tasks where this pointer is never set. | |
2961 | */ | |
2962 | *discarded_events = 0; | |
2963 | goto end; | |
2964 | } | |
2965 | ||
2966 | *discarded_events = chan_ext->discarded_events; | |
2967 | end: | |
2968 | return ret; | |
2969 | } | |
2970 | ||
2971 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2972 | uint64_t *lost_packets) | |
2973 | { | |
2974 | int ret = 0; | |
cf0bcb51 | 2975 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2976 | |
2977 | if (!channel || !lost_packets) { | |
2978 | ret = -LTTNG_ERR_INVALID; | |
2979 | goto end; | |
2980 | } | |
2981 | ||
2982 | chan_ext = channel->attr.extended.ptr; | |
2983 | if (!chan_ext) { | |
2984 | /* | |
2985 | * This can happen since the lttng_channel structure is | |
2986 | * used for other tasks where this pointer is never set. | |
2987 | */ | |
2988 | *lost_packets = 0; | |
2989 | goto end; | |
2990 | } | |
2991 | ||
2992 | *lost_packets = chan_ext->lost_packets; | |
2993 | end: | |
2994 | return ret; | |
2995 | } | |
2996 | ||
cf0bcb51 JG |
2997 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2998 | uint64_t *monitor_timer_interval) | |
2999 | { | |
3000 | int ret = 0; | |
3001 | ||
3002 | if (!chan || !monitor_timer_interval) { | |
3003 | ret = -LTTNG_ERR_INVALID; | |
3004 | goto end; | |
3005 | } | |
3006 | ||
3007 | if (!chan->attr.extended.ptr) { | |
3008 | ret = -LTTNG_ERR_INVALID; | |
3009 | goto end; | |
3010 | } | |
3011 | ||
3012 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
3013 | chan->attr.extended.ptr)->monitor_timer_interval; | |
3014 | end: | |
3015 | return ret; | |
3016 | } | |
3017 | ||
3018 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
3019 | uint64_t monitor_timer_interval) | |
3020 | { | |
3021 | int ret = 0; | |
3022 | ||
3023 | if (!chan || !chan->attr.extended.ptr) { | |
3024 | ret = -LTTNG_ERR_INVALID; | |
3025 | goto end; | |
3026 | } | |
3027 | ||
3028 | ((struct lttng_channel_extended *) | |
3029 | chan->attr.extended.ptr)->monitor_timer_interval = | |
3030 | monitor_timer_interval; | |
3031 | end: | |
3032 | return ret; | |
3033 | } | |
3034 | ||
491d1539 MD |
3035 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
3036 | int64_t *blocking_timeout) | |
3037 | { | |
3038 | int ret = 0; | |
3039 | ||
3040 | if (!chan || !blocking_timeout) { | |
3041 | ret = -LTTNG_ERR_INVALID; | |
3042 | goto end; | |
3043 | } | |
3044 | ||
3045 | if (!chan->attr.extended.ptr) { | |
3046 | ret = -LTTNG_ERR_INVALID; | |
3047 | goto end; | |
3048 | } | |
3049 | ||
3050 | *blocking_timeout = ((struct lttng_channel_extended *) | |
3051 | chan->attr.extended.ptr)->blocking_timeout; | |
3052 | end: | |
3053 | return ret; | |
3054 | } | |
3055 | ||
3056 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
3057 | int64_t blocking_timeout) | |
3058 | { | |
3059 | int ret = 0; | |
3060 | int64_t msec_timeout; | |
3061 | ||
3062 | if (!chan || !chan->attr.extended.ptr) { | |
3063 | ret = -LTTNG_ERR_INVALID; | |
3064 | goto end; | |
3065 | } | |
3066 | ||
3067 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
3068 | ret = -LTTNG_ERR_INVALID; | |
3069 | goto end; | |
3070 | } | |
3071 | ||
3072 | /* | |
3073 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
3074 | * us to accept a narrower range of values (msecs expressed as a signed | |
3075 | * 32-bit integer). | |
3076 | */ | |
3077 | msec_timeout = blocking_timeout / 1000; | |
3078 | if (msec_timeout != (int32_t) msec_timeout) { | |
3079 | ret = -LTTNG_ERR_INVALID; | |
3080 | goto end; | |
3081 | } | |
3082 | ||
3083 | ((struct lttng_channel_extended *) | |
3084 | chan->attr.extended.ptr)->blocking_timeout = | |
3085 | blocking_timeout; | |
3086 | end: | |
3087 | return ret; | |
3088 | } | |
3089 | ||
fac6795d | 3090 | /* |
2269e89e | 3091 | * Check if session daemon is alive. |
fac6795d | 3092 | * |
2269e89e | 3093 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 3094 | * On error returns a negative value. |
fac6795d | 3095 | */ |
947308c4 | 3096 | int lttng_session_daemon_alive(void) |
fac6795d DG |
3097 | { |
3098 | int ret; | |
3099 | ||
3100 | ret = set_session_daemon_path(); | |
3101 | if (ret < 0) { | |
9ae110e2 | 3102 | /* Error. */ |
fac6795d DG |
3103 | return ret; |
3104 | } | |
3105 | ||
9d035200 | 3106 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 3107 | /* |
9ae110e2 JG |
3108 | * No socket path set. Weird error which means the constructor |
3109 | * was not called. | |
2f70b271 DG |
3110 | */ |
3111 | assert(0); | |
fac6795d DG |
3112 | } |
3113 | ||
2269e89e | 3114 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 3115 | if (ret < 0) { |
9ae110e2 | 3116 | /* Not alive. */ |
7d8234d9 MD |
3117 | return 0; |
3118 | } | |
7d8234d9 | 3119 | |
9ae110e2 | 3120 | /* Is alive. */ |
947308c4 | 3121 | return 1; |
fac6795d DG |
3122 | } |
3123 | ||
00e2e675 | 3124 | /* |
a4b92340 | 3125 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
3126 | * |
3127 | * Return 0 on success, else a negative value. | |
3128 | */ | |
a4b92340 DG |
3129 | int lttng_set_consumer_url(struct lttng_handle *handle, |
3130 | const char *control_url, const char *data_url) | |
00e2e675 | 3131 | { |
3dd05a85 | 3132 | int ret; |
a4b92340 | 3133 | ssize_t size; |
00e2e675 | 3134 | struct lttcomm_session_msg lsm; |
a4b92340 | 3135 | struct lttng_uri *uris = NULL; |
00e2e675 | 3136 | |
a4b92340 | 3137 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
e1b624d0 JG |
3138 | ret = -LTTNG_ERR_INVALID; |
3139 | goto error; | |
00e2e675 DG |
3140 | } |
3141 | ||
a4b92340 DG |
3142 | memset(&lsm, 0, sizeof(lsm)); |
3143 | ||
00e2e675 DG |
3144 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
3145 | ||
e1b624d0 | 3146 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 3147 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3148 | if (ret) { |
3149 | ret = -LTTNG_ERR_INVALID; | |
3150 | goto error; | |
3151 | } | |
3152 | ||
60160d2a | 3153 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 3154 | |
bc894455 | 3155 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 3156 | if (size < 0) { |
e1b624d0 JG |
3157 | ret = -LTTNG_ERR_INVALID; |
3158 | goto error; | |
a4b92340 DG |
3159 | } |
3160 | ||
3161 | lsm.u.uri.size = size; | |
00e2e675 | 3162 | |
795a978d | 3163 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 3164 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
3165 | |
3166 | free(uris); | |
e1b624d0 | 3167 | error: |
3dd05a85 | 3168 | return ret; |
00e2e675 DG |
3169 | } |
3170 | ||
3171 | /* | |
9c6bda17 | 3172 | * [OBSOLETE] |
00e2e675 | 3173 | */ |
2ec40111 | 3174 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
3175 | int lttng_enable_consumer(struct lttng_handle *handle) |
3176 | { | |
785d2d0d | 3177 | return -ENOSYS; |
00e2e675 DG |
3178 | } |
3179 | ||
3180 | /* | |
9c6bda17 | 3181 | * [OBSOLETE] |
00e2e675 | 3182 | */ |
2ec40111 | 3183 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
3184 | int lttng_disable_consumer(struct lttng_handle *handle) |
3185 | { | |
785d2d0d | 3186 | return -ENOSYS; |
00e2e675 DG |
3187 | } |
3188 | ||
07424f16 | 3189 | /* |
b178f53e | 3190 | * [OBSOLETE] |
07424f16 | 3191 | */ |
2ec40111 SM |
3192 | int _lttng_create_session_ext(const char *name, const char *url, |
3193 | const char *datetime); | |
07424f16 DG |
3194 | int _lttng_create_session_ext(const char *name, const char *url, |
3195 | const char *datetime) | |
3196 | { | |
b178f53e | 3197 | return -ENOSYS; |
07424f16 DG |
3198 | } |
3199 | ||
806e2684 DG |
3200 | /* |
3201 | * For a given session name, this call checks if the data is ready to be read | |
3202 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
3203 | * any readers. | |
3204 | */ | |
6d805429 | 3205 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
3206 | { |
3207 | int ret; | |
3208 | struct lttcomm_session_msg lsm; | |
f6151c55 | 3209 | uint8_t *pending = NULL; |
806e2684 DG |
3210 | |
3211 | if (session_name == NULL) { | |
3212 | return -LTTNG_ERR_INVALID; | |
3213 | } | |
3214 | ||
53efb85a | 3215 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 3216 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 3217 | |
e1b624d0 | 3218 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 3219 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3220 | if (ret) { |
3221 | ret = -LTTNG_ERR_INVALID; | |
3222 | goto end; | |
3223 | } | |
806e2684 | 3224 | |
f6151c55 JG |
3225 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
3226 | if (ret < 0) { | |
3227 | goto end; | |
3228 | } else if (ret != 1) { | |
3229 | /* Unexpected payload size */ | |
3230 | ret = -LTTNG_ERR_INVALID; | |
3231 | goto end; | |
e848d36d JG |
3232 | } else if (!pending) { |
3233 | /* Internal error. */ | |
3234 | ret = -LTTNG_ERR_UNK; | |
3235 | goto end; | |
806e2684 DG |
3236 | } |
3237 | ||
f6151c55 JG |
3238 | ret = (int) *pending; |
3239 | end: | |
3240 | free(pending); | |
806e2684 DG |
3241 | return ret; |
3242 | } | |
3243 | ||
93ec662e JD |
3244 | /* |
3245 | * Regenerate the metadata for a session. | |
3246 | * Return 0 on success, a negative error code on error. | |
3247 | */ | |
eded6438 | 3248 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
3249 | { |
3250 | int ret; | |
3251 | struct lttcomm_session_msg lsm; | |
3252 | ||
3253 | if (!session_name) { | |
3254 | ret = -LTTNG_ERR_INVALID; | |
3255 | goto end; | |
3256 | } | |
3257 | ||
3258 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 3259 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 3260 | |
e1b624d0 | 3261 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 3262 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3263 | if (ret) { |
3264 | ret = -LTTNG_ERR_INVALID; | |
3265 | goto end; | |
3266 | } | |
93ec662e JD |
3267 | |
3268 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3269 | if (ret < 0) { | |
3270 | goto end; | |
3271 | } | |
3272 | ||
3273 | ret = 0; | |
3274 | end: | |
3275 | return ret; | |
3276 | } | |
3277 | ||
eded6438 JD |
3278 | /* |
3279 | * Deprecated, replaced by lttng_regenerate_metadata. | |
3280 | */ | |
3281 | int lttng_metadata_regenerate(const char *session_name) | |
3282 | { | |
3283 | return lttng_regenerate_metadata(session_name); | |
3284 | } | |
3285 | ||
c2561365 JD |
3286 | /* |
3287 | * Regenerate the statedump of a session. | |
3288 | * Return 0 on success, a negative error code on error. | |
3289 | */ | |
3290 | int lttng_regenerate_statedump(const char *session_name) | |
3291 | { | |
3292 | int ret; | |
3293 | struct lttcomm_session_msg lsm; | |
3294 | ||
3295 | if (!session_name) { | |
3296 | ret = -LTTNG_ERR_INVALID; | |
3297 | goto end; | |
3298 | } | |
3299 | ||
3300 | memset(&lsm, 0, sizeof(lsm)); | |
3301 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
3302 | ||
e1b624d0 | 3303 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 3304 | sizeof(lsm.session.name)); |
e1b624d0 JG |
3305 | if (ret) { |
3306 | ret = -LTTNG_ERR_INVALID; | |
3307 | goto end; | |
3308 | } | |
c2561365 JD |
3309 | |
3310 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3311 | if (ret < 0) { | |
3312 | goto end; | |
3313 | } | |
3314 | ||
3315 | ret = 0; | |
3316 | end: | |
3317 | return ret; | |
3318 | } | |
3319 | ||
a58c490f JG |
3320 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3321 | { | |
3322 | int ret; | |
99608320 JR |
3323 | struct lttcomm_session_msg lsm = { |
3324 | .cmd_type = LTTNG_REGISTER_TRIGGER, | |
3325 | }; | |
3326 | struct lttcomm_session_msg *message_lsm; | |
3327 | struct lttng_payload message; | |
3328 | struct lttng_payload reply; | |
242388e4 | 3329 | struct lttng_trigger *reply_trigger = NULL; |
9124c630 | 3330 | enum lttng_domain_type domain_type; |
64eafdf6 JR |
3331 | const struct lttng_credentials user_creds = { |
3332 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3333 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3334 | }; | |
99608320 | 3335 | |
242388e4 | 3336 | |
99608320 JR |
3337 | lttng_payload_init(&message); |
3338 | lttng_payload_init(&reply); | |
a58c490f JG |
3339 | |
3340 | if (!trigger) { | |
3341 | ret = -LTTNG_ERR_INVALID; | |
3342 | goto end; | |
3343 | } | |
3344 | ||
64eafdf6 JR |
3345 | if (!trigger->creds.uid.is_set) { |
3346 | /* Use the client's credentials as the trigger credentials. */ | |
3347 | lttng_trigger_set_credentials(trigger, &user_creds); | |
3348 | } else { | |
3349 | /* | |
3350 | * Validate that either the current trigger credentials and the | |
3351 | * client credentials are identical or that the current user is | |
3352 | * root. The root user can register, unregister triggers for | |
3353 | * himself and other users. | |
3354 | * | |
3355 | * This check is also present on the sessiond side, using the | |
3356 | * credentials passed on the socket. These check are all | |
3357 | * "safety" checks. | |
3358 | */ | |
3359 | const struct lttng_credentials *trigger_creds = | |
3360 | lttng_trigger_get_credentials(trigger); | |
3361 | ||
3362 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { | |
3363 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3364 | ret = -LTTNG_ERR_EPERM; | |
3365 | goto end; | |
3366 | } | |
3367 | } | |
3368 | } | |
3369 | ||
a58c490f | 3370 | if (!lttng_trigger_validate(trigger)) { |
eac4828d | 3371 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3372 | goto end; |
3373 | } | |
3374 | ||
9124c630 JR |
3375 | domain_type = lttng_trigger_get_underlying_domain_type_restriction( |
3376 | trigger); | |
3377 | ||
3378 | lsm.domain.type = domain_type; | |
3379 | ||
97285430 JG |
3380 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3381 | if (ret) { | |
3382 | ret = -LTTNG_ERR_NOMEM; | |
3383 | goto end; | |
3384 | } | |
99608320 | 3385 | |
99608320 | 3386 | ret = lttng_trigger_serialize(trigger, &message); |
3647288f | 3387 | if (ret < 0) { |
a58c490f JG |
3388 | ret = -LTTNG_ERR_UNK; |
3389 | goto end; | |
3390 | } | |
3391 | ||
b22f4f54 JG |
3392 | /* |
3393 | * This is needed to populate the trigger object size for the command | |
3394 | * header. | |
3395 | */ | |
3396 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3397 | ||
99608320 JR |
3398 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3399 | ||
3400 | { | |
3401 | struct lttng_payload_view message_view = | |
3402 | lttng_payload_view_from_payload( | |
3403 | &message, 0, -1); | |
3404 | ||
3405 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3406 | &message_view); | |
3407 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3408 | if (ret < 0) { | |
3409 | goto end; | |
3410 | } | |
3411 | } | |
3412 | ||
242388e4 JR |
3413 | { |
3414 | struct lttng_payload_view reply_view = | |
3415 | lttng_payload_view_from_payload( | |
3416 | &reply, 0, reply.buffer.size); | |
3417 | ||
3418 | ret = lttng_trigger_create_from_payload( | |
3419 | &reply_view, &reply_trigger); | |
3420 | if (ret < 0) { | |
3421 | ret = -LTTNG_ERR_FATAL; | |
3422 | goto end; | |
3423 | } | |
3424 | } | |
3425 | ||
3426 | ret = lttng_trigger_assign_name(trigger, reply_trigger); | |
3427 | if (ret < 0) { | |
3428 | ret = -LTTNG_ERR_FATAL; | |
3429 | goto end; | |
3430 | } | |
3431 | ||
99608320 | 3432 | ret = 0; |
a58c490f | 3433 | end: |
99608320 JR |
3434 | lttng_payload_reset(&message); |
3435 | lttng_payload_reset(&reply); | |
242388e4 | 3436 | lttng_trigger_destroy(reply_trigger); |
a58c490f JG |
3437 | return ret; |
3438 | } | |
3439 | ||
b61776fb | 3440 | int lttng_unregister_trigger(const struct lttng_trigger *trigger) |
a58c490f JG |
3441 | { |
3442 | int ret; | |
3443 | struct lttcomm_session_msg lsm; | |
99608320 JR |
3444 | struct lttcomm_session_msg *message_lsm; |
3445 | struct lttng_payload message; | |
3446 | struct lttng_payload reply; | |
b61776fb | 3447 | struct lttng_trigger *copy = NULL; |
64eafdf6 JR |
3448 | const struct lttng_credentials user_creds = { |
3449 | .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), | |
3450 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
3451 | }; | |
99608320 JR |
3452 | |
3453 | lttng_payload_init(&message); | |
3454 | lttng_payload_init(&reply); | |
a58c490f JG |
3455 | |
3456 | if (!trigger) { | |
3457 | ret = -LTTNG_ERR_INVALID; | |
3458 | goto end; | |
3459 | } | |
3460 | ||
b61776fb SM |
3461 | copy = lttng_trigger_copy(trigger); |
3462 | if (!copy) { | |
3463 | ret = -LTTNG_ERR_UNK; | |
3464 | goto end; | |
3465 | } | |
3466 | ||
3467 | if (!copy->creds.uid.is_set) { | |
3468 | /* Use the client credentials as the trigger credentials */ | |
3469 | lttng_trigger_set_credentials(copy, &user_creds); | |
64eafdf6 JR |
3470 | } else { |
3471 | /* | |
3472 | * Validate that either the current trigger credentials and the | |
3473 | * client credentials are identical or that the current user is | |
3474 | * root. The root user can register, unregister triggers for | |
3475 | * himself and other users. | |
3476 | * | |
3477 | * This check is also present on the sessiond side, using the | |
3478 | * credentials passed on the socket. These check are all | |
3479 | * "safety" checks. | |
3480 | */ | |
3481 | const struct lttng_credentials *trigger_creds = | |
b61776fb | 3482 | lttng_trigger_get_credentials(copy); |
64eafdf6 JR |
3483 | if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { |
3484 | if (lttng_credentials_get_uid(&user_creds) != 0) { | |
3485 | ret = -LTTNG_ERR_EPERM; | |
3486 | goto end; | |
3487 | } | |
3488 | } | |
3489 | } | |
3490 | ||
b61776fb | 3491 | if (!lttng_trigger_validate(copy)) { |
3647288f | 3492 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3493 | goto end; |
3494 | } | |
3495 | ||
99608320 JR |
3496 | memset(&lsm, 0, sizeof(lsm)); |
3497 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3498 | ||
97285430 JG |
3499 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); |
3500 | if (ret) { | |
3501 | ret = -LTTNG_ERR_NOMEM; | |
3502 | goto end; | |
3503 | } | |
99608320 JR |
3504 | |
3505 | /* | |
3506 | * This is needed to populate the trigger object size for the command | |
3507 | * header and number of fds sent. | |
3508 | */ | |
3509 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3510 | ||
b61776fb | 3511 | ret = lttng_trigger_serialize(copy, &message); |
3647288f | 3512 | if (ret < 0) { |
a58c490f JG |
3513 | ret = -LTTNG_ERR_UNK; |
3514 | goto end; | |
3515 | } | |
3516 | ||
99608320 JR |
3517 | message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); |
3518 | ||
3519 | { | |
3520 | struct lttng_payload_view message_view = | |
3521 | lttng_payload_view_from_payload( | |
3522 | &message, 0, -1); | |
3523 | ||
3524 | /* | |
3525 | * Update the message header with the number of fd that will be | |
3526 | * sent. | |
3527 | */ | |
3528 | message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( | |
3529 | &message_view); | |
3530 | ||
3531 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3532 | if (ret < 0) { | |
3533 | goto end; | |
3534 | } | |
3535 | } | |
3536 | ||
3537 | ret = 0; | |
a58c490f | 3538 | end: |
b61776fb | 3539 | lttng_trigger_destroy(copy); |
99608320 JR |
3540 | lttng_payload_reset(&message); |
3541 | lttng_payload_reset(&reply); | |
a58c490f JG |
3542 | return ret; |
3543 | } | |
3544 | ||
fbc9f37d JR |
3545 | /* |
3546 | * Ask the session daemon for all registered triggers for the current user. | |
3547 | * | |
3548 | * Allocates and return an lttng_triggers set. | |
3549 | * On error, returns a suitable lttng_error_code. | |
3550 | */ | |
3551 | enum lttng_error_code lttng_list_triggers(struct lttng_triggers **triggers) | |
3552 | { | |
3553 | int ret; | |
3554 | enum lttng_error_code ret_code = LTTNG_OK; | |
3555 | struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_LIST_TRIGGERS }; | |
3556 | struct lttng_triggers *local_triggers = NULL; | |
3557 | struct lttng_payload reply; | |
3558 | struct lttng_payload_view lsm_view = | |
3559 | lttng_payload_view_init_from_buffer( | |
3560 | (const char *) &lsm, 0, sizeof(lsm)); | |
3561 | ||
3562 | lttng_payload_init(&reply); | |
3563 | ||
3564 | ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &reply); | |
3565 | if (ret < 0) { | |
3566 | ret_code = (enum lttng_error_code) -ret; | |
3567 | goto end; | |
3568 | } | |
3569 | ||
3570 | { | |
3571 | struct lttng_payload_view reply_view = | |
3572 | lttng_payload_view_from_payload( | |
3573 | &reply, 0, reply.buffer.size); | |
3574 | ||
3575 | ret = lttng_triggers_create_from_payload( | |
3576 | &reply_view, &local_triggers); | |
3577 | if (ret < 0) { | |
3578 | ret_code = LTTNG_ERR_FATAL; | |
3579 | goto end; | |
3580 | } | |
3581 | } | |
3582 | ||
3583 | *triggers = local_triggers; | |
3584 | local_triggers = NULL; | |
3585 | end: | |
3586 | lttng_payload_reset(&reply); | |
3587 | lttng_triggers_destroy(local_triggers); | |
3588 | return ret_code; | |
3589 | } | |
3590 | ||
ebdb334b JR |
3591 | /* |
3592 | * Ask the session daemon for all values for a given map. | |
3593 | * On error, returns a negative value. | |
3594 | */ | |
3595 | enum lttng_error_code lttng_list_map_content( | |
3596 | struct lttng_handle *handle, const struct lttng_map *map, | |
3597 | const struct lttng_map_query *map_query, | |
3598 | struct lttng_map_content **map_content) | |
3599 | { | |
3600 | struct lttcomm_session_msg lsm = { | |
3601 | .cmd_type = LTTNG_LIST_MAP_VALUES, | |
3602 | }; | |
3603 | struct lttcomm_session_msg *message_lsm; | |
3604 | struct lttng_payload message; | |
3605 | struct lttng_payload reply; | |
3606 | enum lttng_error_code ret; | |
3607 | struct lttng_map_content *local_map_content = NULL; | |
3608 | uint32_t map_length, map_query_length; | |
3609 | ||
3610 | lttng_payload_init(&message); | |
3611 | lttng_payload_init(&reply); | |
3612 | ||
3613 | if (!map || !map_query) { | |
3614 | ret = -LTTNG_ERR_INVALID; | |
3615 | goto end; | |
3616 | } | |
3617 | ||
3618 | lsm.domain.type = handle->domain.type; | |
3619 | ret = lttng_strncpy(lsm.session.name, handle->session_name, | |
3620 | sizeof(lsm.session.name)); | |
3621 | if (ret) { | |
3622 | ret = -LTTNG_ERR_NOMEM; | |
3623 | goto end; | |
3624 | } | |
3625 | ||
3626 | ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); | |
3627 | if (ret) { | |
3628 | ret = -LTTNG_ERR_NOMEM; | |
3629 | goto end; | |
3630 | } | |
3631 | ||
3632 | ret = lttng_map_serialize(map, &message); | |
3633 | if (ret < 0) { | |
3634 | ret = -LTTNG_ERR_UNK; | |
3635 | goto end; | |
3636 | } | |
3637 | ||
3638 | map_length = (uint32_t) message.buffer.size - sizeof(lsm); | |
3639 | ||
3640 | ret = lttng_map_query_serialize(map_query, &message); | |
3641 | if (ret < 0) { | |
3642 | ret = -LTTNG_ERR_UNK; | |
3643 | goto end; | |
3644 | } | |
3645 | map_query_length = (uint32_t) message.buffer.size - map_length - sizeof(lsm); | |
3646 | ||
3647 | message_lsm = (struct lttcomm_session_msg *) message.buffer.data; | |
3648 | message_lsm->u.list_map_values.map_length = map_length; | |
3649 | message_lsm->u.list_map_values.query_length = map_query_length; | |
3650 | { | |
3651 | struct lttng_payload_view message_view = | |
3652 | lttng_payload_view_from_payload( | |
3653 | &message, 0, -1); | |
3654 | ||
3655 | ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); | |
3656 | if (ret < 0) { | |
3657 | goto end; | |
3658 | } | |
3659 | } | |
3660 | ||
3661 | ||
3662 | { | |
3663 | struct lttng_payload_view reply_view = | |
3664 | lttng_payload_view_from_payload( | |
3665 | &reply, 0, reply.buffer.size); | |
3666 | ret = lttng_map_content_create_from_payload( | |
3667 | &reply_view, &local_map_content); | |
3668 | if (ret < 0) { | |
3669 | ret = LTTNG_ERR_FATAL; | |
3670 | goto end; | |
3671 | } | |
3672 | } | |
3673 | ||
3674 | *map_content = local_map_content; | |
3675 | local_map_content = NULL; | |
3676 | ||
3677 | ret = LTTNG_OK; | |
3678 | goto end; | |
3679 | end: | |
3680 | lttng_payload_reset(&reply); | |
3681 | lttng_payload_reset(&message); | |
3682 | lttng_map_content_destroy(local_map_content); | |
3683 | return ret; | |
3684 | } | |
3685 | ||
fac6795d | 3686 | /* |
9ae110e2 | 3687 | * lib constructor. |
fac6795d | 3688 | */ |
b2b89e8a | 3689 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3690 | { |
3691 | /* Set default session group */ | |
bbccc3d2 | 3692 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3693 | } |
49cca668 DG |
3694 | |
3695 | /* | |
9ae110e2 | 3696 | * lib destructor. |
49cca668 | 3697 | */ |
b2b89e8a | 3698 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3699 | { |
3700 | free(tracing_group); | |
3701 | } |