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 | ||
6c1c0768 | 13 | #define _LGPL_SOURCE |
44a5e5eb | 14 | #include <assert.h> |
fac6795d | 15 | #include <grp.h> |
1e307fab | 16 | #include <errno.h> |
fac6795d DG |
17 | #include <stdio.h> |
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
20 | #include <unistd.h> | |
21 | ||
990570ed | 22 | #include <common/common.h> |
15e37663 | 23 | #include <common/compat/string.h> |
990570ed | 24 | #include <common/defaults.h> |
db758600 | 25 | #include <common/sessiond-comm/sessiond-comm.h> |
a4b92340 | 26 | #include <common/uri.h> |
feb0f3e5 | 27 | #include <common/utils.h> |
de453daa | 28 | #include <common/dynamic-buffer.h> |
1e307fab | 29 | #include <lttng/lttng.h> |
0c89d795 | 30 | #include <lttng/health-internal.h> |
a58c490f JG |
31 | #include <lttng/trigger/trigger-internal.h> |
32 | #include <lttng/endpoint.h> | |
33 | #include <lttng/channel-internal.h> | |
de453daa | 34 | #include <lttng/event-internal.h> |
15e37663 | 35 | #include <lttng/userspace-probe-internal.h> |
b178f53e JG |
36 | #include <lttng/session-internal.h> |
37 | #include <lttng/session-descriptor-internal.h> | |
3e3665b8 | 38 | #include <lttng/destruction-handle.h> |
2d97a006 | 39 | #include <lttng/tracker-internal.h> |
fac6795d | 40 | |
d00c599e DG |
41 | #include "filter/filter-ast.h" |
42 | #include "filter/filter-parser.h" | |
43 | #include "filter/filter-bytecode.h" | |
44 | #include "filter/memstream.h" | |
cac3069d | 45 | #include "lttng-ctl-helper.h" |
53a80697 MD |
46 | |
47 | #ifdef DEBUG | |
d00c599e | 48 | static const int print_xml = 1; |
53a80697 MD |
49 | #define dbg_printf(fmt, args...) \ |
50 | printf("[debug liblttng-ctl] " fmt, ## args) | |
51 | #else | |
d00c599e | 52 | static const int print_xml = 0; |
53a80697 MD |
53 | #define dbg_printf(fmt, args...) \ |
54 | do { \ | |
55 | /* do nothing but check printf format */ \ | |
56 | if (0) \ | |
57 | printf("[debug liblttnctl] " fmt, ## args); \ | |
58 | } while (0) | |
59 | #endif | |
60 | ||
60160d2a JG |
61 | #define COPY_DOMAIN_PACKED(dst, src) \ |
62 | do { \ | |
63 | struct lttng_domain _tmp_domain; \ | |
64 | \ | |
65 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
66 | dst = _tmp_domain; \ | |
67 | } while (0) | |
53a80697 | 68 | |
fac6795d | 69 | /* Socket to session daemon for communication */ |
3e3665b8 | 70 | static int sessiond_socket = -1; |
fac6795d DG |
71 | static char sessiond_sock_path[PATH_MAX]; |
72 | ||
fac6795d DG |
73 | /* Variables */ |
74 | static char *tracing_group; | |
75 | static int connected; | |
76 | ||
97e19046 DG |
77 | /* Global */ |
78 | ||
79 | /* | |
80 | * Those two variables are used by error.h to silent or control the verbosity of | |
81 | * error message. They are global to the library so application linking with it | |
82 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
83 | */ |
84 | int lttng_opt_quiet; | |
85 | int lttng_opt_verbose; | |
c7e35b03 | 86 | int lttng_opt_mi; |
97e19046 | 87 | |
99497cd0 MD |
88 | /* |
89 | * Copy string from src to dst and enforce null terminated byte. | |
90 | */ | |
cac3069d DG |
91 | LTTNG_HIDDEN |
92 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len) | |
99497cd0 | 93 | { |
e7d6716d | 94 | if (src && dst) { |
99497cd0 MD |
95 | strncpy(dst, src, len); |
96 | /* Enforce the NULL terminated byte */ | |
97 | dst[len - 1] = '\0'; | |
cd80958d DG |
98 | } else if (dst) { |
99 | dst[0] = '\0'; | |
99497cd0 MD |
100 | } |
101 | } | |
102 | ||
fac6795d | 103 | /* |
cd80958d | 104 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 105 | * |
cd80958d DG |
106 | * If domain is unknown, default domain will be the kernel. |
107 | */ | |
cac3069d DG |
108 | LTTNG_HIDDEN |
109 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
110 | struct lttng_domain *src) | |
cd80958d DG |
111 | { |
112 | if (src && dst) { | |
113 | switch (src->type) { | |
00e2e675 DG |
114 | case LTTNG_DOMAIN_KERNEL: |
115 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 116 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 117 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 118 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
119 | memcpy(dst, src, sizeof(struct lttng_domain)); |
120 | break; | |
121 | default: | |
122 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 123 | break; |
cd80958d DG |
124 | } |
125 | } | |
126 | } | |
127 | ||
128 | /* | |
129 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 130 | * |
1c8d13c8 TD |
131 | * On success, returns the number of bytes sent (>=0) |
132 | * On error, returns -1 | |
fac6795d | 133 | */ |
cd80958d | 134 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
135 | { |
136 | int ret; | |
137 | ||
138 | if (!connected) { | |
2f70b271 | 139 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 140 | goto end; |
fac6795d DG |
141 | } |
142 | ||
a4b92340 DG |
143 | DBG("LSM cmd type : %d", lsm->cmd_type); |
144 | ||
be040666 | 145 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 146 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
147 | if (ret < 0) { |
148 | ret = -LTTNG_ERR_FATAL; | |
149 | } | |
e065084a DG |
150 | |
151 | end: | |
152 | return ret; | |
153 | } | |
154 | ||
53a80697 MD |
155 | /* |
156 | * Send var len data to the session daemon. | |
157 | * | |
158 | * On success, returns the number of bytes sent (>=0) | |
159 | * On error, returns -1 | |
160 | */ | |
c2d69327 | 161 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
162 | { |
163 | int ret; | |
164 | ||
165 | if (!connected) { | |
2f70b271 | 166 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
167 | goto end; |
168 | } | |
a4b92340 | 169 | |
53a80697 MD |
170 | if (!data || !len) { |
171 | ret = 0; | |
172 | goto end; | |
173 | } | |
174 | ||
175 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
176 | if (ret < 0) { |
177 | ret = -LTTNG_ERR_FATAL; | |
178 | } | |
53a80697 MD |
179 | |
180 | end: | |
181 | return ret; | |
182 | } | |
183 | ||
a04d53fc FD |
184 | /* |
185 | * Send file descriptors to the session daemon. | |
186 | * | |
187 | * On success, returns the number of bytes sent (>=0) | |
188 | * On error, returns -1 | |
189 | */ | |
190 | static int send_session_fds(const int *fds, size_t nb_fd) | |
191 | { | |
192 | int ret; | |
193 | ||
194 | if (!connected) { | |
195 | ret = -LTTNG_ERR_NO_SESSIOND; | |
196 | goto end; | |
197 | } | |
198 | ||
199 | if (!fds || !nb_fd) { | |
200 | ret = 0; | |
201 | goto end; | |
202 | } | |
203 | ||
204 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
205 | if (ret < 0) { | |
206 | ret = -LTTNG_ERR_FATAL; | |
207 | } | |
208 | ||
209 | end: | |
210 | return ret; | |
211 | } | |
212 | ||
e065084a | 213 | /* |
cd80958d | 214 | * Receive data from the sessiond socket. |
e065084a | 215 | * |
1c8d13c8 TD |
216 | * On success, returns the number of bytes received (>=0) |
217 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 218 | */ |
ca95a216 | 219 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
220 | { |
221 | int ret; | |
222 | ||
223 | if (!connected) { | |
2f70b271 | 224 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 225 | goto end; |
fac6795d DG |
226 | } |
227 | ||
ca95a216 | 228 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
229 | if (ret < 0) { |
230 | ret = -LTTNG_ERR_FATAL; | |
231 | } | |
fac6795d | 232 | |
e065084a | 233 | end: |
fac6795d DG |
234 | return ret; |
235 | } | |
236 | ||
237 | /* | |
9ae110e2 | 238 | * Check if we are in the specified group. |
65beb5ff | 239 | * |
9ae110e2 | 240 | * If yes return 1, else return -1. |
947308c4 | 241 | */ |
6c71277b MD |
242 | LTTNG_HIDDEN |
243 | int lttng_check_tracing_group(void) | |
947308c4 | 244 | { |
28ab59d0 | 245 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
246 | int grp_list_size, grp_id, i; |
247 | int ret = -1; | |
6c71277b | 248 | const char *grp_name = tracing_group; |
947308c4 DG |
249 | |
250 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 251 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 252 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
253 | goto end; |
254 | } | |
255 | ||
256 | /* Get number of supplementary group IDs */ | |
257 | grp_list_size = getgroups(0, NULL); | |
258 | if (grp_list_size < 0) { | |
6f04ed72 | 259 | PERROR("getgroups"); |
947308c4 DG |
260 | goto end; |
261 | } | |
262 | ||
263 | /* Alloc group list of the right size */ | |
3f451dc0 | 264 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 265 | if (!grp_list) { |
6f04ed72 | 266 | PERROR("malloc"); |
00795392 MD |
267 | goto end; |
268 | } | |
947308c4 | 269 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 270 | if (grp_id < 0) { |
6f04ed72 | 271 | PERROR("getgroups"); |
947308c4 DG |
272 | goto free_list; |
273 | } | |
274 | ||
275 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 276 | if (grp_list[i] == tracing_gid) { |
2269e89e | 277 | ret = 1; |
947308c4 DG |
278 | break; |
279 | } | |
280 | } | |
281 | ||
282 | free_list: | |
283 | free(grp_list); | |
284 | ||
285 | end: | |
286 | return ret; | |
287 | } | |
288 | ||
09b72f7a FD |
289 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
290 | { | |
291 | int ret; | |
292 | long num_cpu; | |
293 | size_t best_mem_info; | |
294 | size_t num_bytes_requested_total; | |
295 | ||
296 | /* | |
297 | * Get the number of CPU currently online to compute the amount of | |
298 | * memory needed to create a buffer for every CPU. | |
299 | */ | |
300 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
301 | if (num_cpu == -1) { | |
302 | goto error; | |
303 | } | |
304 | ||
305 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
306 | ||
307 | /* | |
308 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
309 | * reliable estimate we can get but it is only exposed by the kernel | |
310 | * since 3.14. (See Linux kernel commit: | |
311 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
312 | */ | |
313 | ret = utils_get_memory_available(&best_mem_info); | |
314 | if (ret >= 0) { | |
315 | goto success; | |
316 | } | |
317 | ||
318 | /* | |
319 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
320 | * is a sanity check for obvious user error. | |
321 | */ | |
322 | ret = utils_get_memory_total(&best_mem_info); | |
323 | if (ret >= 0) { | |
324 | goto success; | |
325 | } | |
326 | ||
327 | error: | |
328 | return -1; | |
329 | success: | |
330 | return best_mem_info >= num_bytes_requested_total; | |
331 | } | |
332 | ||
947308c4 | 333 | /* |
2269e89e DG |
334 | * Try connect to session daemon with sock_path. |
335 | * | |
336 | * Return 0 on success, else -1 | |
337 | */ | |
338 | static int try_connect_sessiond(const char *sock_path) | |
339 | { | |
340 | int ret; | |
341 | ||
342 | /* If socket exist, we check if the daemon listens for connect. */ | |
343 | ret = access(sock_path, F_OK); | |
344 | if (ret < 0) { | |
345 | /* Not alive */ | |
2f70b271 | 346 | goto error; |
2269e89e DG |
347 | } |
348 | ||
349 | ret = lttcomm_connect_unix_sock(sock_path); | |
350 | if (ret < 0) { | |
9ae110e2 | 351 | /* Not alive. */ |
2f70b271 | 352 | goto error; |
2269e89e DG |
353 | } |
354 | ||
355 | ret = lttcomm_close_unix_sock(ret); | |
356 | if (ret < 0) { | |
6f04ed72 | 357 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
358 | } |
359 | ||
360 | return 0; | |
2f70b271 DG |
361 | |
362 | error: | |
363 | return -1; | |
2269e89e DG |
364 | } |
365 | ||
366 | /* | |
2f70b271 DG |
367 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
368 | * variable. | |
369 | * | |
370 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
371 | * is somehow too long or ENOMEM). | |
947308c4 DG |
372 | */ |
373 | static int set_session_daemon_path(void) | |
374 | { | |
9ae110e2 | 375 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
376 | uid_t uid; |
377 | ||
378 | uid = getuid(); | |
947308c4 | 379 | |
2269e89e DG |
380 | if (uid != 0) { |
381 | /* Are we in the tracing group ? */ | |
6c71277b | 382 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
383 | } |
384 | ||
08a9c49f | 385 | if ((uid == 0) || in_tgroup) { |
cac3069d DG |
386 | lttng_ctl_copy_string(sessiond_sock_path, |
387 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); | |
08a9c49f | 388 | } |
2269e89e | 389 | |
08a9c49f | 390 | if (uid != 0) { |
c617c0c6 MD |
391 | int ret; |
392 | ||
08a9c49f | 393 | if (in_tgroup) { |
9ae110e2 | 394 | /* Tracing group. */ |
08a9c49f TD |
395 | ret = try_connect_sessiond(sessiond_sock_path); |
396 | if (ret >= 0) { | |
397 | goto end; | |
2269e89e | 398 | } |
08a9c49f | 399 | /* Global session daemon not available... */ |
2269e89e | 400 | } |
08a9c49f TD |
401 | /* ...or not in tracing group (and not root), default */ |
402 | ||
403 | /* | |
9ae110e2 JG |
404 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
405 | * is too small; | |
406 | * With GNU C >= 2.1, snprintf returns the required size | |
407 | * (excluding closing null) | |
08a9c49f TD |
408 | */ |
409 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 410 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 411 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 412 | goto error; |
947308c4 | 413 | } |
947308c4 | 414 | } |
08a9c49f | 415 | end: |
947308c4 | 416 | return 0; |
2f70b271 DG |
417 | |
418 | error: | |
419 | return -1; | |
947308c4 DG |
420 | } |
421 | ||
65beb5ff | 422 | /* |
9ae110e2 | 423 | * Connect to the LTTng session daemon. |
65beb5ff | 424 | * |
3e3665b8 | 425 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 426 | */ |
3e3665b8 | 427 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
428 | { |
429 | int ret; | |
430 | ||
431 | ret = set_session_daemon_path(); | |
432 | if (ret < 0) { | |
2f70b271 | 433 | goto error; |
65beb5ff DG |
434 | } |
435 | ||
9ae110e2 | 436 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
437 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
438 | if (ret < 0) { | |
2f70b271 | 439 | goto error; |
65beb5ff DG |
440 | } |
441 | ||
3e3665b8 | 442 | return ret; |
2f70b271 DG |
443 | |
444 | error: | |
445 | return -1; | |
65beb5ff DG |
446 | } |
447 | ||
3e3665b8 JG |
448 | static void reset_global_sessiond_connection_state(void) |
449 | { | |
450 | sessiond_socket = -1; | |
451 | connected = 0; | |
452 | } | |
453 | ||
65beb5ff | 454 | /* |
1c8d13c8 | 455 | * Clean disconnect from the session daemon. |
9ae110e2 | 456 | * |
1c8d13c8 | 457 | * On success, return 0. On error, return -1. |
65beb5ff DG |
458 | */ |
459 | static int disconnect_sessiond(void) | |
460 | { | |
461 | int ret = 0; | |
462 | ||
463 | if (connected) { | |
464 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 465 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
466 | } |
467 | ||
468 | return ret; | |
469 | } | |
470 | ||
795a978d PP |
471 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
472 | size_t *user_len) | |
473 | { | |
474 | int ret = 0; | |
475 | void *buf = NULL; | |
476 | ||
477 | if (len) { | |
478 | if (!user_len) { | |
479 | ret = -LTTNG_ERR_INVALID; | |
480 | goto end; | |
481 | } | |
482 | ||
483 | buf = zmalloc(len); | |
484 | if (!buf) { | |
485 | ret = -ENOMEM; | |
486 | goto end; | |
487 | } | |
488 | ||
489 | ret = recv_data_sessiond(buf, len); | |
490 | if (ret < 0) { | |
491 | goto end; | |
492 | } | |
493 | ||
494 | if (!user_buf) { | |
495 | ret = -LTTNG_ERR_INVALID; | |
496 | goto end; | |
497 | } | |
498 | ||
499 | /* Move ownership of command header buffer to user. */ | |
500 | *user_buf = buf; | |
501 | buf = NULL; | |
502 | *user_len = len; | |
503 | } else { | |
504 | /* No command header. */ | |
505 | if (user_len) { | |
506 | *user_len = 0; | |
507 | } | |
508 | ||
509 | if (user_buf) { | |
510 | *user_buf = NULL; | |
511 | } | |
512 | } | |
513 | ||
514 | end: | |
515 | free(buf); | |
516 | return ret; | |
517 | } | |
518 | ||
35a6fdb7 | 519 | /* |
cd80958d | 520 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
521 | * Takes extra var. len. data and file descriptors as input to send to the |
522 | * session daemon. | |
65beb5ff | 523 | * |
af87c45a | 524 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 525 | */ |
cac3069d | 526 | LTTNG_HIDDEN |
a04d53fc FD |
527 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
528 | const int *fds, size_t nb_fd, const void *vardata, | |
529 | size_t vardata_len, void **user_payload_buf, | |
530 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
531 | { |
532 | int ret; | |
795a978d | 533 | size_t payload_len; |
cd80958d | 534 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
535 | |
536 | ret = connect_sessiond(); | |
537 | if (ret < 0) { | |
2f70b271 | 538 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 539 | goto end; |
3e3665b8 JG |
540 | } else { |
541 | sessiond_socket = ret; | |
542 | connected = 1; | |
65beb5ff DG |
543 | } |
544 | ||
65beb5ff | 545 | /* Send command to session daemon */ |
cd80958d | 546 | ret = send_session_msg(lsm); |
65beb5ff | 547 | if (ret < 0) { |
2f70b271 | 548 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
549 | goto end; |
550 | } | |
53a80697 | 551 | /* Send var len data */ |
795a978d | 552 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 553 | if (ret < 0) { |
2f70b271 | 554 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
555 | goto end; |
556 | } | |
65beb5ff | 557 | |
a04d53fc FD |
558 | /* Send fds */ |
559 | ret = send_session_fds(fds, nb_fd); | |
560 | if (ret < 0) { | |
561 | /* Ret value is a valid lttng error code. */ | |
562 | goto end; | |
563 | } | |
564 | ||
65beb5ff DG |
565 | /* Get header from data transmission */ |
566 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
567 | if (ret < 0) { | |
2f70b271 | 568 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
569 | goto end; |
570 | } | |
571 | ||
572 | /* Check error code if OK */ | |
f73fabfd | 573 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
574 | ret = -llm.ret_code; |
575 | goto end; | |
576 | } | |
577 | ||
795a978d PP |
578 | /* Get command header from data transmission */ |
579 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
580 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 581 | if (ret < 0) { |
65beb5ff DG |
582 | goto end; |
583 | } | |
584 | ||
795a978d PP |
585 | /* Get payload from data transmission */ |
586 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
587 | &payload_len); | |
588 | if (ret < 0) { | |
83009e5e DG |
589 | goto end; |
590 | } | |
591 | ||
795a978d | 592 | ret = llm.data_size; |
65beb5ff DG |
593 | |
594 | end: | |
595 | disconnect_sessiond(); | |
596 | return ret; | |
597 | } | |
598 | ||
9f19cc17 | 599 | /* |
cd80958d | 600 | * Create lttng handle and return pointer. |
9ae110e2 | 601 | * |
1c8d13c8 | 602 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 603 | */ |
cd80958d DG |
604 | struct lttng_handle *lttng_create_handle(const char *session_name, |
605 | struct lttng_domain *domain) | |
9f19cc17 | 606 | { |
2f70b271 DG |
607 | struct lttng_handle *handle = NULL; |
608 | ||
3f451dc0 | 609 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 610 | if (handle == NULL) { |
2f70b271 | 611 | PERROR("malloc handle"); |
cd80958d DG |
612 | goto end; |
613 | } | |
614 | ||
615 | /* Copy session name */ | |
cac3069d | 616 | lttng_ctl_copy_string(handle->session_name, session_name, |
cd80958d DG |
617 | sizeof(handle->session_name)); |
618 | ||
95681498 JG |
619 | /* Copy lttng domain or leave initialized to 0. */ |
620 | if (domain) { | |
621 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
622 | } | |
cd80958d DG |
623 | |
624 | end: | |
625 | return handle; | |
626 | } | |
627 | ||
628 | /* | |
629 | * Destroy handle by free(3) the pointer. | |
630 | */ | |
631 | void lttng_destroy_handle(struct lttng_handle *handle) | |
632 | { | |
0e428499 | 633 | free(handle); |
eb354453 DG |
634 | } |
635 | ||
d9800920 DG |
636 | /* |
637 | * Register an outside consumer. | |
9ae110e2 | 638 | * |
1c8d13c8 | 639 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
640 | */ |
641 | int lttng_register_consumer(struct lttng_handle *handle, | |
642 | const char *socket_path) | |
643 | { | |
644 | struct lttcomm_session_msg lsm; | |
645 | ||
2f70b271 DG |
646 | if (handle == NULL || socket_path == NULL) { |
647 | return -LTTNG_ERR_INVALID; | |
648 | } | |
649 | ||
53efb85a | 650 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 651 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
cac3069d | 652 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
d9800920 | 653 | sizeof(lsm.session.name)); |
60160d2a | 654 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 655 | |
9ae110e2 JG |
656 | lttng_ctl_copy_string(lsm.u.reg.path, socket_path, |
657 | sizeof(lsm.u.reg.path)); | |
d9800920 | 658 | |
cac3069d | 659 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
d9800920 DG |
660 | } |
661 | ||
1df4dedd | 662 | /* |
9ae110e2 JG |
663 | * Start tracing for all traces of the session. |
664 | * | |
665 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 666 | */ |
6a4f824d | 667 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 668 | { |
cd80958d DG |
669 | struct lttcomm_session_msg lsm; |
670 | ||
6a4f824d | 671 | if (session_name == NULL) { |
2f70b271 | 672 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
673 | } |
674 | ||
53efb85a | 675 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 676 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 677 | |
cac3069d DG |
678 | lttng_ctl_copy_string(lsm.session.name, session_name, |
679 | sizeof(lsm.session.name)); | |
cd80958d | 680 | |
cac3069d | 681 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
f3ed775e | 682 | } |
1df4dedd DG |
683 | |
684 | /* | |
38ee087f | 685 | * Stop tracing for all traces of the session. |
f3ed775e | 686 | */ |
38ee087f | 687 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 688 | { |
38ee087f | 689 | int ret, data_ret; |
cd80958d DG |
690 | struct lttcomm_session_msg lsm; |
691 | ||
6a4f824d | 692 | if (session_name == NULL) { |
2f70b271 | 693 | return -LTTNG_ERR_INVALID; |
6a4f824d DG |
694 | } |
695 | ||
53efb85a | 696 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 697 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 698 | |
cac3069d DG |
699 | lttng_ctl_copy_string(lsm.session.name, session_name, |
700 | sizeof(lsm.session.name)); | |
cd80958d | 701 | |
cac3069d | 702 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
703 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
704 | goto error; | |
705 | } | |
706 | ||
707 | if (!wait) { | |
708 | goto end; | |
709 | } | |
710 | ||
38ee087f DG |
711 | /* Check for data availability */ |
712 | do { | |
6d805429 | 713 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
714 | if (data_ret < 0) { |
715 | /* Return the data available call error. */ | |
716 | ret = data_ret; | |
717 | goto error; | |
718 | } | |
719 | ||
720 | /* | |
9ae110e2 JG |
721 | * Data sleep time before retrying (in usec). Don't sleep if the |
722 | * call returned value indicates availability. | |
38ee087f | 723 | */ |
6d805429 | 724 | if (data_ret) { |
c8f61fd4 | 725 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 726 | } |
6d805429 | 727 | } while (data_ret != 0); |
38ee087f | 728 | |
38ee087f DG |
729 | end: |
730 | error: | |
731 | return ret; | |
732 | } | |
733 | ||
734 | /* | |
735 | * Stop tracing and wait for data availability. | |
736 | */ | |
737 | int lttng_stop_tracing(const char *session_name) | |
738 | { | |
739 | return _lttng_stop_tracing(session_name, 1); | |
740 | } | |
741 | ||
742 | /* | |
743 | * Stop tracing but _don't_ wait for data availability. | |
744 | */ | |
745 | int lttng_stop_tracing_no_wait(const char *session_name) | |
746 | { | |
747 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
748 | } |
749 | ||
750 | /* | |
601d5acf DG |
751 | * Add context to a channel. |
752 | * | |
753 | * If the given channel is NULL, add the contexts to all channels. | |
754 | * The event_name param is ignored. | |
af87c45a DG |
755 | * |
756 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 757 | */ |
cd80958d | 758 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
759 | struct lttng_event_context *ctx, const char *event_name, |
760 | const char *channel_name) | |
d65106b1 | 761 | { |
2001793c JG |
762 | int ret; |
763 | size_t len = 0; | |
764 | char *buf = NULL; | |
cd80958d DG |
765 | struct lttcomm_session_msg lsm; |
766 | ||
9ae110e2 | 767 | /* Safety check. Both are mandatory. */ |
9d697d3d | 768 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
769 | ret = -LTTNG_ERR_INVALID; |
770 | goto end; | |
cd80958d DG |
771 | } |
772 | ||
441c16a7 | 773 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
774 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
775 | ||
85076754 MD |
776 | /* If no channel name, send empty string. */ |
777 | if (channel_name == NULL) { | |
778 | lttng_ctl_copy_string(lsm.u.context.channel_name, "", | |
779 | sizeof(lsm.u.context.channel_name)); | |
780 | } else { | |
781 | lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, | |
782 | sizeof(lsm.u.context.channel_name)); | |
783 | } | |
cd80958d | 784 | |
60160d2a | 785 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cac3069d | 786 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
787 | sizeof(lsm.session.name)); |
788 | ||
2001793c JG |
789 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
790 | size_t provider_len, ctx_len; | |
791 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
792 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
793 | ||
794 | if (!provider_name || !ctx_name) { | |
795 | ret = -LTTNG_ERR_INVALID; | |
796 | goto end; | |
797 | } | |
798 | ||
799 | provider_len = strlen(provider_name); | |
800 | if (provider_len == 0) { | |
801 | ret = -LTTNG_ERR_INVALID; | |
802 | goto end; | |
803 | } | |
804 | lsm.u.context.provider_name_len = provider_len; | |
805 | ||
806 | ctx_len = strlen(ctx_name); | |
807 | if (ctx_len == 0) { | |
808 | ret = -LTTNG_ERR_INVALID; | |
809 | goto end; | |
810 | } | |
811 | lsm.u.context.context_name_len = ctx_len; | |
812 | ||
813 | len = provider_len + ctx_len; | |
814 | buf = zmalloc(len); | |
815 | if (!buf) { | |
816 | ret = -LTTNG_ERR_NOMEM; | |
817 | goto end; | |
818 | } | |
819 | ||
820 | memcpy(buf, provider_name, provider_len); | |
821 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
822 | } | |
823 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
824 | |
825 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
826 | /* | |
827 | * Don't leak application addresses to the sessiond. | |
828 | * This is only necessary when ctx is for an app ctx otherwise | |
829 | * the values inside the union (type & config) are overwritten. | |
830 | */ | |
831 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
832 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
833 | } | |
2001793c | 834 | |
795a978d | 835 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
836 | end: |
837 | free(buf); | |
838 | return ret; | |
d65106b1 DG |
839 | } |
840 | ||
f3ed775e | 841 | /* |
9ae110e2 JG |
842 | * Enable event(s) for a channel. |
843 | * | |
844 | * If no event name is specified, all events are enabled. | |
845 | * If no channel name is specified, the default 'channel0' is used. | |
846 | * | |
847 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 848 | */ |
cd80958d | 849 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 850 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 851 | { |
f8a96544 JI |
852 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
853 | NULL, 0, NULL); | |
1df4dedd DG |
854 | } |
855 | ||
53a80697 | 856 | /* |
025faf73 | 857 | * Create or enable an event with a filter expression. |
178191b3 | 858 | * |
53a80697 MD |
859 | * Return negative error value on error. |
860 | * Return size of returned session payload data if OK. | |
861 | */ | |
025faf73 | 862 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 863 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
864 | const char *filter_expression) |
865 | { | |
f8a96544 JI |
866 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
867 | filter_expression, 0, NULL); | |
53a80697 MD |
868 | } |
869 | ||
347c5ab5 | 870 | /* |
0e115563 | 871 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
872 | * NULL if not applicable. |
873 | * | |
874 | * An event with NO loglevel and the name is * will return NULL. | |
875 | */ | |
0e115563 | 876 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
877 | { |
878 | int err; | |
0e115563 | 879 | char *agent_filter = NULL; |
347c5ab5 DG |
880 | |
881 | assert(ev); | |
882 | ||
883 | /* Don't add filter for the '*' event. */ | |
9f449915 | 884 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 885 | if (filter) { |
0e115563 | 886 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
887 | ev->name); |
888 | } else { | |
0e115563 | 889 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
890 | } |
891 | if (err < 0) { | |
892 | PERROR("asprintf"); | |
6a556f7b | 893 | goto error; |
347c5ab5 DG |
894 | } |
895 | } | |
896 | ||
897 | /* Add loglevel filtering if any for the JUL domain. */ | |
898 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
b53d4e59 | 899 | const char *op; |
347c5ab5 DG |
900 | |
901 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
902 | op = ">="; | |
903 | } else { | |
904 | op = "=="; | |
905 | } | |
906 | ||
0e115563 | 907 | if (filter || agent_filter) { |
6a556f7b JG |
908 | char *new_filter; |
909 | ||
fb0edb23 | 910 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 911 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 912 | ev->loglevel); |
0e115563 DG |
913 | if (agent_filter) { |
914 | free(agent_filter); | |
6a556f7b | 915 | } |
0e115563 | 916 | agent_filter = new_filter; |
347c5ab5 | 917 | } else { |
0e115563 | 918 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
919 | ev->loglevel); |
920 | } | |
921 | if (err < 0) { | |
922 | PERROR("asprintf"); | |
6a556f7b | 923 | goto error; |
347c5ab5 DG |
924 | } |
925 | } | |
926 | ||
0e115563 | 927 | return agent_filter; |
6a556f7b | 928 | error: |
0e115563 | 929 | free(agent_filter); |
6a556f7b | 930 | return NULL; |
347c5ab5 DG |
931 | } |
932 | ||
137b9942 | 933 | /* |
ec166985 | 934 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
935 | * newly allocated parser context in ctxp and populate the lsm object with the |
936 | * expression len. | |
937 | * | |
938 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
939 | */ | |
940 | static int generate_filter(char *filter_expression, | |
941 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
942 | { | |
943 | int ret; | |
944 | struct filter_parser_ctx *ctx = NULL; | |
945 | FILE *fmem = NULL; | |
946 | ||
947 | assert(filter_expression); | |
948 | assert(lsm); | |
949 | assert(ctxp); | |
950 | ||
951 | /* | |
952 | * Casting const to non-const, as the underlying function will use it in | |
953 | * read-only mode. | |
954 | */ | |
955 | fmem = lttng_fmemopen((void *) filter_expression, | |
956 | strlen(filter_expression), "r"); | |
957 | if (!fmem) { | |
958 | fprintf(stderr, "Error opening memory as stream\n"); | |
959 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
960 | goto error; | |
961 | } | |
962 | ctx = filter_parser_ctx_alloc(fmem); | |
963 | if (!ctx) { | |
964 | fprintf(stderr, "Error allocating parser\n"); | |
965 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
966 | goto filter_alloc_error; | |
967 | } | |
968 | ret = filter_parser_ctx_append_ast(ctx); | |
969 | if (ret) { | |
970 | fprintf(stderr, "Parse error\n"); | |
971 | ret = -LTTNG_ERR_FILTER_INVAL; | |
972 | goto parse_error; | |
973 | } | |
137b9942 DG |
974 | if (print_xml) { |
975 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
976 | if (ret) { | |
977 | fflush(stdout); | |
978 | fprintf(stderr, "XML print error\n"); | |
979 | ret = -LTTNG_ERR_FILTER_INVAL; | |
980 | goto parse_error; | |
981 | } | |
982 | } | |
983 | ||
984 | dbg_printf("Generating IR... "); | |
985 | fflush(stdout); | |
986 | ret = filter_visitor_ir_generate(ctx); | |
987 | if (ret) { | |
988 | fprintf(stderr, "Generate IR error\n"); | |
989 | ret = -LTTNG_ERR_FILTER_INVAL; | |
990 | goto parse_error; | |
991 | } | |
992 | dbg_printf("done\n"); | |
993 | ||
994 | dbg_printf("Validating IR... "); | |
995 | fflush(stdout); | |
996 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
997 | if (ret) { | |
998 | ret = -LTTNG_ERR_FILTER_INVAL; | |
999 | goto parse_error; | |
1000 | } | |
9f449915 PP |
1001 | |
1002 | /* Normalize globbing patterns in the expression. */ | |
1003 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
1004 | if (ret) { | |
1005 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1006 | goto parse_error; | |
1007 | } | |
1008 | ||
9ae110e2 | 1009 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
1010 | ret = filter_visitor_ir_validate_string(ctx); |
1011 | if (ret) { | |
1012 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1013 | goto parse_error; | |
1014 | } | |
9f449915 PP |
1015 | |
1016 | /* Validate globbing patterns in the expression. */ | |
1017 | ret = filter_visitor_ir_validate_globbing(ctx); | |
1018 | if (ret) { | |
1019 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1020 | goto parse_error; | |
1021 | } | |
1022 | ||
137b9942 DG |
1023 | dbg_printf("done\n"); |
1024 | ||
1025 | dbg_printf("Generating bytecode... "); | |
1026 | fflush(stdout); | |
1027 | ret = filter_visitor_bytecode_generate(ctx); | |
1028 | if (ret) { | |
1029 | fprintf(stderr, "Generate bytecode error\n"); | |
1030 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1031 | goto parse_error; | |
1032 | } | |
1033 | dbg_printf("done\n"); | |
1034 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
1035 | bytecode_get_len(&ctx->bytecode->b)); | |
1036 | ||
1037 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1038 | + bytecode_get_len(&ctx->bytecode->b); | |
1039 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
1040 | ||
1041 | /* No need to keep the memory stream. */ | |
1042 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1043 | PERROR("fclose"); |
137b9942 DG |
1044 | } |
1045 | ||
1046 | *ctxp = ctx; | |
1047 | return 0; | |
1048 | ||
1049 | parse_error: | |
137b9942 DG |
1050 | filter_ir_free(ctx); |
1051 | filter_parser_ctx_free(ctx); | |
1052 | filter_alloc_error: | |
1053 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1054 | PERROR("fclose"); |
137b9942 DG |
1055 | } |
1056 | error: | |
1057 | return ret; | |
1058 | } | |
1059 | ||
93deb080 JI |
1060 | /* |
1061 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1062 | * If no event name is specified, all events are enabled. | |
1063 | * If no channel name is specified, the default name is used. | |
1064 | * If filter expression is not NULL, the filter is set for the event. | |
1065 | * If exclusion count is not zero, the exclusions are set for the event. | |
1066 | * Returns size of returned session payload data or a negative error code. | |
1067 | */ | |
1068 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1069 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1070 | const char *original_filter_expression, |
93deb080 JI |
1071 | int exclusion_count, char **exclusion_list) |
1072 | { | |
1073 | struct lttcomm_session_msg lsm; | |
15e37663 JG |
1074 | struct lttng_dynamic_buffer send_buffer; |
1075 | int ret = 0, i, fd_to_send = -1; | |
1076 | bool send_fd = false; | |
137b9942 | 1077 | unsigned int free_filter_expression = 0; |
93deb080 | 1078 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1079 | |
6a0838b7 YL |
1080 | /* |
1081 | * We have either a filter or some exclusions, so we need to set up | |
1082 | * a variable-length memory block from where to send the data. | |
1083 | */ | |
1084 | lttng_dynamic_buffer_init(&send_buffer); | |
ec005ec6 | 1085 | |
e9efbcd3 JG |
1086 | /* |
1087 | * Cast as non-const since we may replace the filter expression | |
1088 | * by a dynamically allocated string. Otherwise, the original | |
1089 | * string is not modified. | |
1090 | */ | |
1091 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1092 | |
1093 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1094 | ret = -LTTNG_ERR_INVALID; |
1095 | goto error; | |
93deb080 JI |
1096 | } |
1097 | ||
9ae110e2 JG |
1098 | /* |
1099 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1100 | * anyway, so treat this corner-case early to eliminate |
1101 | * lttng_fmemopen error for 0-byte allocation. | |
1102 | */ | |
1103 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1104 | ret = -LTTNG_ERR_INVALID; |
1105 | goto error; | |
93deb080 JI |
1106 | } |
1107 | ||
1108 | memset(&lsm, 0, sizeof(lsm)); | |
1109 | ||
1110 | /* If no channel name, send empty string. */ | |
1111 | if (channel_name == NULL) { | |
1112 | lttng_ctl_copy_string(lsm.u.enable.channel_name, "", | |
1113 | sizeof(lsm.u.enable.channel_name)); | |
1114 | } else { | |
1115 | lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, | |
1116 | sizeof(lsm.u.enable.channel_name)); | |
1117 | } | |
1118 | ||
18a720cd MD |
1119 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1120 | if (ev->name[0] == '\0') { | |
1121 | /* Enable all events */ | |
1122 | lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); | |
6565421f | 1123 | } |
93deb080 | 1124 | |
60160d2a | 1125 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1126 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1127 | ||
1128 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
1129 | sizeof(lsm.session.name)); | |
1130 | lsm.u.enable.exclusion_count = exclusion_count; | |
1131 | lsm.u.enable.bytecode_len = 0; | |
1132 | ||
9ae110e2 | 1133 | /* Parse filter expression. */ |
5cdb6027 | 1134 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1135 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1136 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1137 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1138 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1139 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1140 | char *agent_filter; | |
64226865 | 1141 | |
347c5ab5 | 1142 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1143 | agent_filter = set_agent_filter(filter_expression, ev); |
1144 | if (!agent_filter) { | |
137b9942 | 1145 | if (!filter_expression) { |
9ae110e2 JG |
1146 | /* |
1147 | * No JUL and no filter, just skip | |
1148 | * everything below. | |
1149 | */ | |
137b9942 DG |
1150 | goto ask_sessiond; |
1151 | } | |
64226865 DG |
1152 | } else { |
1153 | /* | |
9ae110e2 JG |
1154 | * With an agent filter, the original filter has |
1155 | * been added to it thus replace the filter | |
1156 | * expression. | |
64226865 | 1157 | */ |
0e115563 | 1158 | filter_expression = agent_filter; |
e9efbcd3 | 1159 | free_filter_expression = 1; |
9b21e6d5 | 1160 | } |
9b21e6d5 | 1161 | } |
93deb080 | 1162 | |
137b9942 | 1163 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1164 | if (ret) { |
137b9942 | 1165 | goto filter_error; |
93deb080 | 1166 | } |
6b453b5e JG |
1167 | } |
1168 | ||
15e37663 JG |
1169 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1170 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1171 | + lsm.u.enable.expression_len |
1172 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1173 | if (ret) { |
6b453b5e | 1174 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1175 | goto mem_error; |
6b453b5e | 1176 | } |
137b9942 | 1177 | |
9ae110e2 | 1178 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1179 | for (i = 0; i < exclusion_count; i++) { |
1180 | size_t exclusion_len; | |
1181 | ||
1182 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1183 | LTTNG_SYMBOL_NAME_LEN); | |
1184 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1185 | /* Exclusion is not NULL-terminated. */ | |
1186 | ret = -LTTNG_ERR_INVALID; | |
1187 | goto mem_error; | |
1188 | } | |
1189 | ||
1190 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1191 | *(exclusion_list + i), | |
1192 | LTTNG_SYMBOL_NAME_LEN); | |
1193 | if (ret) { | |
1194 | goto mem_error; | |
1195 | } | |
6b453b5e | 1196 | } |
15e37663 | 1197 | |
9ae110e2 | 1198 | /* Add filter expression next. */ |
15e37663 JG |
1199 | if (filter_expression) { |
1200 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1201 | filter_expression, lsm.u.enable.expression_len); | |
1202 | if (ret) { | |
1203 | goto mem_error; | |
1204 | } | |
6b453b5e | 1205 | } |
9ae110e2 | 1206 | /* Add filter bytecode next. */ |
137b9942 | 1207 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1208 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1209 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1210 | if (ret) { | |
1211 | goto mem_error; | |
1212 | } | |
1213 | } | |
1214 | if (ev->extended.ptr) { | |
1215 | struct lttng_event_extended *ev_ext = | |
1216 | (struct lttng_event_extended *) ev->extended.ptr; | |
1217 | ||
1218 | if (ev_ext->probe_location) { | |
1219 | /* | |
1220 | * lttng_userspace_probe_location_serialize returns the | |
1221 | * number of bytes that was appended to the buffer. | |
1222 | */ | |
1223 | ret = lttng_userspace_probe_location_serialize( | |
1224 | ev_ext->probe_location, &send_buffer, | |
1225 | &fd_to_send); | |
56f0bc67 | 1226 | if (ret < 0) { |
15e37663 JG |
1227 | goto mem_error; |
1228 | } | |
1229 | ||
1230 | send_fd = fd_to_send >= 0; | |
1231 | /* | |
1232 | * Set the size of the userspace probe location element | |
1233 | * of the buffer so that the receiving side knows where | |
1234 | * to split it. | |
1235 | */ | |
1236 | lsm.u.enable.userspace_probe_location_len = ret; | |
1237 | } | |
93deb080 JI |
1238 | } |
1239 | ||
15e37663 JG |
1240 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1241 | send_fd ? &fd_to_send : NULL, | |
1242 | send_fd ? 1 : 0, | |
1243 | send_buffer.size ? send_buffer.data : NULL, | |
1244 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1245 | |
7ca1dc6f DG |
1246 | mem_error: |
1247 | if (filter_expression && ctx) { | |
93deb080 JI |
1248 | filter_bytecode_free(ctx); |
1249 | filter_ir_free(ctx); | |
1250 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1251 | } |
1252 | filter_error: | |
1253 | if (free_filter_expression) { | |
1254 | /* | |
9ae110e2 JG |
1255 | * The filter expression has been replaced and must be freed as |
1256 | * it is not the original filter expression received as a | |
1257 | * parameter. | |
7ca1dc6f DG |
1258 | */ |
1259 | free(filter_expression); | |
93deb080 | 1260 | } |
137b9942 DG |
1261 | error: |
1262 | /* | |
9ae110e2 JG |
1263 | * Return directly to the caller and don't ask the sessiond since |
1264 | * something went wrong in the parsing of data above. | |
137b9942 | 1265 | */ |
15e37663 | 1266 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1267 | return ret; |
3e1c9ff7 DG |
1268 | |
1269 | ask_sessiond: | |
1270 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1271 | return ret; | |
93deb080 JI |
1272 | } |
1273 | ||
6e911cad MD |
1274 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1275 | struct lttng_event *ev, const char *channel_name, | |
1276 | const char *original_filter_expression) | |
1df4dedd | 1277 | { |
cd80958d | 1278 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1279 | char *varlen_data; |
1280 | int ret = 0; | |
1281 | unsigned int free_filter_expression = 0; | |
1282 | struct filter_parser_ctx *ctx = NULL; | |
1283 | /* | |
1284 | * Cast as non-const since we may replace the filter expression | |
1285 | * by a dynamically allocated string. Otherwise, the original | |
1286 | * string is not modified. | |
1287 | */ | |
1288 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1289 | |
6e911cad MD |
1290 | if (handle == NULL || ev == NULL) { |
1291 | ret = -LTTNG_ERR_INVALID; | |
1292 | goto error; | |
1293 | } | |
1294 | ||
9ae110e2 JG |
1295 | /* |
1296 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1297 | * anyway, so treat this corner-case early to eliminate |
1298 | * lttng_fmemopen error for 0-byte allocation. | |
1299 | */ | |
1300 | if (filter_expression && filter_expression[0] == '\0') { | |
1301 | ret = -LTTNG_ERR_INVALID; | |
1302 | goto error; | |
cd80958d DG |
1303 | } |
1304 | ||
441c16a7 MD |
1305 | memset(&lsm, 0, sizeof(lsm)); |
1306 | ||
85076754 MD |
1307 | /* If no channel name, send empty string. */ |
1308 | if (channel_name == NULL) { | |
1309 | lttng_ctl_copy_string(lsm.u.disable.channel_name, "", | |
cd80958d | 1310 | sizeof(lsm.u.disable.channel_name)); |
f3ed775e | 1311 | } else { |
85076754 | 1312 | lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, |
cd80958d | 1313 | sizeof(lsm.u.disable.channel_name)); |
eb354453 DG |
1314 | } |
1315 | ||
18a720cd | 1316 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1317 | |
60160d2a | 1318 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1319 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1320 | ||
cac3069d | 1321 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 1322 | sizeof(lsm.session.name)); |
6e911cad | 1323 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1324 | |
6e911cad MD |
1325 | /* |
1326 | * For the JUL domain, a filter is enforced except for the | |
1327 | * disable all event. This is done to avoid having the event in | |
1328 | * all sessions thus filtering by logger name. | |
1329 | */ | |
1330 | if (filter_expression == NULL && | |
1331 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1332 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1333 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1334 | goto ask_sessiond; |
1335 | } | |
1336 | ||
1337 | /* | |
1338 | * We have a filter, so we need to set up a variable-length | |
1339 | * memory block from where to send the data. | |
1340 | */ | |
1341 | ||
1342 | /* Parse filter expression */ | |
1343 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1344 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1345 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1346 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1347 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1348 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1349 | char *agent_filter; | |
6e911cad MD |
1350 | |
1351 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1352 | agent_filter = set_agent_filter(filter_expression, ev); |
1353 | if (!agent_filter) { | |
6e911cad | 1354 | if (!filter_expression) { |
9ae110e2 JG |
1355 | /* |
1356 | * No JUL and no filter, just skip | |
1357 | * everything below. | |
1358 | */ | |
6e911cad MD |
1359 | goto ask_sessiond; |
1360 | } | |
1361 | } else { | |
1362 | /* | |
9ae110e2 JG |
1363 | * With a JUL filter, the original filter has |
1364 | * been added to it thus replace the filter | |
1365 | * expression. | |
6e911cad | 1366 | */ |
0e115563 | 1367 | filter_expression = agent_filter; |
6e911cad MD |
1368 | free_filter_expression = 1; |
1369 | } | |
1370 | } | |
1371 | ||
1372 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1373 | if (ret) { | |
1374 | goto filter_error; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1379 | + lsm.u.disable.expression_len); | |
1380 | if (!varlen_data) { | |
1381 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1382 | goto mem_error; | |
1383 | } | |
1384 | ||
9ae110e2 | 1385 | /* Add filter expression. */ |
6e911cad MD |
1386 | if (lsm.u.disable.expression_len != 0) { |
1387 | memcpy(varlen_data, | |
1388 | filter_expression, | |
1389 | lsm.u.disable.expression_len); | |
1390 | } | |
9ae110e2 | 1391 | /* Add filter bytecode next. */ |
6e911cad MD |
1392 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1393 | memcpy(varlen_data | |
1394 | + lsm.u.disable.expression_len, | |
1395 | &ctx->bytecode->b, | |
1396 | lsm.u.disable.bytecode_len); | |
1397 | } | |
1398 | ||
795a978d | 1399 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1400 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1401 | free(varlen_data); | |
1402 | ||
1403 | mem_error: | |
1404 | if (filter_expression && ctx) { | |
1405 | filter_bytecode_free(ctx); | |
1406 | filter_ir_free(ctx); | |
1407 | filter_parser_ctx_free(ctx); | |
1408 | } | |
1409 | filter_error: | |
1410 | if (free_filter_expression) { | |
1411 | /* | |
9ae110e2 JG |
1412 | * The filter expression has been replaced and must be freed as |
1413 | * it is not the original filter expression received as a | |
1414 | * parameter. | |
6e911cad MD |
1415 | */ |
1416 | free(filter_expression); | |
1417 | } | |
1418 | error: | |
1419 | /* | |
9ae110e2 JG |
1420 | * Return directly to the caller and don't ask the sessiond since |
1421 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1422 | */ |
1423 | return ret; | |
1424 | ||
1425 | ask_sessiond: | |
1426 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1427 | return ret; | |
1428 | } | |
1429 | ||
1430 | /* | |
9ae110e2 JG |
1431 | * Disable event(s) of a channel and domain. |
1432 | * If no event name is specified, all events are disabled. | |
1433 | * If no channel name is specified, the default 'channel0' is used. | |
1434 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1435 | */ |
1436 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1437 | const char *channel_name) | |
1438 | { | |
1439 | struct lttng_event ev; | |
1440 | ||
1441 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1442 | ev.loglevel = -1; |
6e911cad MD |
1443 | ev.type = LTTNG_EVENT_ALL; |
1444 | lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); | |
1445 | return lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1df4dedd DG |
1446 | } |
1447 | ||
cf0bcb51 JG |
1448 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1449 | { | |
1450 | struct lttng_channel *channel = NULL; | |
1451 | struct lttng_channel_extended *extended = NULL; | |
1452 | ||
1453 | if (!domain) { | |
1454 | goto error; | |
1455 | } | |
1456 | ||
1457 | /* Validate domain. */ | |
1458 | switch (domain->type) { | |
1459 | case LTTNG_DOMAIN_UST: | |
1460 | switch (domain->buf_type) { | |
1461 | case LTTNG_BUFFER_PER_UID: | |
1462 | case LTTNG_BUFFER_PER_PID: | |
1463 | break; | |
1464 | default: | |
1465 | goto error; | |
1466 | } | |
1467 | break; | |
1468 | case LTTNG_DOMAIN_KERNEL: | |
1469 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1470 | goto error; | |
1471 | } | |
1472 | break; | |
1473 | default: | |
1474 | goto error; | |
1475 | } | |
1476 | ||
1477 | channel = zmalloc(sizeof(*channel)); | |
1478 | if (!channel) { | |
1479 | goto error; | |
1480 | } | |
1481 | ||
1482 | extended = zmalloc(sizeof(*extended)); | |
1483 | if (!extended) { | |
1484 | goto error; | |
1485 | } | |
1486 | ||
1487 | channel->attr.extended.ptr = extended; | |
1488 | ||
1489 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1490 | return channel; | |
1491 | error: | |
1492 | free(channel); | |
1493 | free(extended); | |
1494 | return NULL; | |
1495 | } | |
1496 | ||
1497 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1498 | { | |
1499 | if (!channel) { | |
1500 | return; | |
1501 | } | |
1502 | ||
1503 | if (channel->attr.extended.ptr) { | |
1504 | free(channel->attr.extended.ptr); | |
1505 | } | |
1506 | free(channel); | |
1507 | } | |
1508 | ||
1df4dedd | 1509 | /* |
9ae110e2 JG |
1510 | * Enable channel per domain |
1511 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1512 | */ |
cd80958d | 1513 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1514 | struct lttng_channel *in_chan) |
a5c5a2bd | 1515 | { |
cd80958d | 1516 | struct lttcomm_session_msg lsm; |
09b72f7a | 1517 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1518 | |
9ae110e2 | 1519 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1520 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1521 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1522 | } |
1523 | ||
441c16a7 | 1524 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1525 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1526 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1527 | |
cf0bcb51 JG |
1528 | if (!in_chan->attr.extended.ptr) { |
1529 | struct lttng_channel *channel; | |
1530 | struct lttng_channel_extended *extended; | |
7d29a247 | 1531 | |
cf0bcb51 JG |
1532 | channel = lttng_channel_create(&handle->domain); |
1533 | if (!channel) { | |
1534 | return -LTTNG_ERR_NOMEM; | |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * Create a new channel in order to use default extended | |
1539 | * attribute values. | |
1540 | */ | |
1541 | extended = (struct lttng_channel_extended *) | |
1542 | channel->attr.extended.ptr; | |
1543 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1544 | lttng_channel_destroy(channel); | |
1545 | } else { | |
1546 | struct lttng_channel_extended *extended; | |
1547 | ||
1548 | extended = (struct lttng_channel_extended *) | |
1549 | in_chan->attr.extended.ptr; | |
1550 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1551 | } | |
cd80958d | 1552 | |
09b72f7a FD |
1553 | /* |
1554 | * Verify that the amount of memory required to create the requested | |
1555 | * buffer is available on the system at the moment. | |
1556 | */ | |
1557 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1558 | lsm.u.channel.chan.attr.subbuf_size; | |
1559 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1560 | return -LTTNG_ERR_NOMEM; | |
1561 | } | |
1562 | ||
cf0bcb51 | 1563 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1564 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1565 | |
cac3069d | 1566 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1567 | sizeof(lsm.session.name)); |
1568 | ||
cac3069d | 1569 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
8c0faa1d | 1570 | } |
1df4dedd | 1571 | |
2ef84c95 | 1572 | /* |
9ae110e2 JG |
1573 | * All tracing will be stopped for registered events of the channel. |
1574 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1575 | */ |
cd80958d | 1576 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1577 | { |
cd80958d DG |
1578 | struct lttcomm_session_msg lsm; |
1579 | ||
9ae110e2 | 1580 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1581 | if (handle == NULL || name == NULL) { |
2f70b271 | 1582 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1583 | } |
1584 | ||
441c16a7 MD |
1585 | memset(&lsm, 0, sizeof(lsm)); |
1586 | ||
cd80958d | 1587 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1588 | |
cac3069d | 1589 | lttng_ctl_copy_string(lsm.u.disable.channel_name, name, |
9d697d3d DG |
1590 | sizeof(lsm.u.disable.channel_name)); |
1591 | ||
60160d2a | 1592 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1593 | |
cac3069d | 1594 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d DG |
1595 | sizeof(lsm.session.name)); |
1596 | ||
cac3069d | 1597 | return lttng_ctl_ask_sessiond(&lsm, NULL); |
ca95a216 DG |
1598 | } |
1599 | ||
fac6795d | 1600 | /* |
9ae110e2 JG |
1601 | * Lists all available tracepoints of domain. |
1602 | * Sets the contents of the events array. | |
1603 | * Returns the number of lttng_event entries in events; | |
1604 | * on error, returns a negative value. | |
fac6795d | 1605 | */ |
cd80958d | 1606 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1607 | struct lttng_event **events) |
fac6795d | 1608 | { |
052da939 | 1609 | int ret; |
cd80958d DG |
1610 | struct lttcomm_session_msg lsm; |
1611 | ||
9d697d3d | 1612 | if (handle == NULL) { |
2f70b271 | 1613 | return -LTTNG_ERR_INVALID; |
cd80958d | 1614 | } |
fac6795d | 1615 | |
53efb85a | 1616 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1617 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1618 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1619 | |
cac3069d | 1620 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1621 | if (ret < 0) { |
1622 | return ret; | |
eb354453 | 1623 | } |
fac6795d | 1624 | |
9f19cc17 | 1625 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1626 | } |
1627 | ||
f37d259d | 1628 | /* |
9ae110e2 JG |
1629 | * Lists all available tracepoint fields of domain. |
1630 | * Sets the contents of the event field array. | |
1631 | * Returns the number of lttng_event_field entries in events; | |
1632 | * on error, returns a negative value. | |
f37d259d MD |
1633 | */ |
1634 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1635 | struct lttng_event_field **fields) | |
1636 | { | |
1637 | int ret; | |
1638 | struct lttcomm_session_msg lsm; | |
1639 | ||
1640 | if (handle == NULL) { | |
2f70b271 | 1641 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1642 | } |
1643 | ||
53efb85a | 1644 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1645 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1646 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1647 | |
cac3069d | 1648 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1649 | if (ret < 0) { |
1650 | return ret; | |
1651 | } | |
1652 | ||
1653 | return ret / sizeof(struct lttng_event_field); | |
1654 | } | |
1655 | ||
834978fd | 1656 | /* |
9ae110e2 JG |
1657 | * Lists all available kernel system calls. Allocates and sets the contents of |
1658 | * the events array. | |
834978fd | 1659 | * |
9ae110e2 JG |
1660 | * Returns the number of lttng_event entries in events; on error, returns a |
1661 | * negative value. | |
834978fd DG |
1662 | */ |
1663 | int lttng_list_syscalls(struct lttng_event **events) | |
1664 | { | |
1665 | int ret; | |
1666 | struct lttcomm_session_msg lsm; | |
1667 | ||
1668 | if (!events) { | |
1669 | return -LTTNG_ERR_INVALID; | |
1670 | } | |
1671 | ||
1672 | memset(&lsm, 0, sizeof(lsm)); | |
1673 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1674 | /* Force kernel domain for system calls. */ | |
1675 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1676 | ||
1677 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1678 | if (ret < 0) { | |
1679 | return ret; | |
1680 | } | |
1681 | ||
1682 | return ret / sizeof(struct lttng_event); | |
1683 | } | |
1684 | ||
1657e9bb | 1685 | /* |
9ae110e2 JG |
1686 | * Returns a human readable string describing |
1687 | * the error code (a negative value). | |
1657e9bb | 1688 | */ |
9a745bc7 | 1689 | const char *lttng_strerror(int code) |
1657e9bb | 1690 | { |
f73fabfd | 1691 | return error_get_str(code); |
1657e9bb DG |
1692 | } |
1693 | ||
b178f53e JG |
1694 | enum lttng_error_code lttng_create_session_ext( |
1695 | struct lttng_session_descriptor *session_descriptor) | |
1696 | { | |
1697 | enum lttng_error_code ret_code; | |
1698 | struct lttcomm_session_msg lsm = { | |
1699 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1700 | }; | |
1701 | void *reply = NULL; | |
1702 | struct lttng_buffer_view reply_view; | |
1703 | int reply_ret; | |
1704 | bool sessiond_must_generate_ouput; | |
1705 | struct lttng_dynamic_buffer payload; | |
1706 | int ret; | |
1707 | size_t descriptor_size; | |
1708 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1709 | ||
1710 | lttng_dynamic_buffer_init(&payload); | |
1711 | if (!session_descriptor) { | |
1712 | ret_code = LTTNG_ERR_INVALID; | |
1713 | goto end; | |
1714 | } | |
1715 | ||
1716 | sessiond_must_generate_ouput = | |
1717 | !lttng_session_descriptor_is_output_destination_initialized( | |
1718 | session_descriptor); | |
1719 | if (sessiond_must_generate_ouput) { | |
1720 | const char *home_dir = utils_get_home_dir(); | |
1721 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1722 | ||
1723 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1724 | ret_code = LTTNG_ERR_FATAL; | |
1725 | goto end; | |
1726 | } | |
1727 | ||
1728 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1729 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1730 | home_dir_len); | |
1731 | if (ret) { | |
1732 | ret_code = LTTNG_ERR_NOMEM; | |
1733 | goto end; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | descriptor_size = payload.size; | |
1738 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1739 | &payload); | |
1740 | if (ret) { | |
1741 | ret_code = LTTNG_ERR_INVALID; | |
1742 | goto end; | |
1743 | } | |
1744 | descriptor_size = payload.size - descriptor_size; | |
1745 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1746 | ||
1747 | /* Command returns a session descriptor on success. */ | |
1748 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1749 | payload.size, &reply); | |
1750 | if (reply_ret < 0) { | |
1751 | ret_code = -reply_ret; | |
1752 | goto end; | |
1753 | } else if (reply_ret == 0) { | |
1754 | /* Socket unexpectedly closed by the session daemon. */ | |
1755 | ret_code = LTTNG_ERR_FATAL; | |
1756 | goto end; | |
1757 | } | |
1758 | ||
1759 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1760 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1761 | &descriptor_reply); | |
1762 | if (ret < 0) { | |
1763 | ret_code = LTTNG_ERR_FATAL; | |
1764 | goto end; | |
1765 | } | |
1766 | ret_code = LTTNG_OK; | |
1767 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1768 | end: | |
1769 | free(reply); | |
1770 | lttng_dynamic_buffer_reset(&payload); | |
1771 | lttng_session_descriptor_destroy(descriptor_reply); | |
1772 | return ret_code; | |
1773 | } | |
1774 | ||
aaf97519 | 1775 | /* |
b178f53e | 1776 | * Create a new session using name and url for destination. |
a4b92340 | 1777 | * |
780d4bb8 | 1778 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1779 | */ |
a4b92340 | 1780 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1781 | { |
3dd05a85 | 1782 | int ret; |
a4b92340 | 1783 | ssize_t size; |
a4b92340 | 1784 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1785 | struct lttng_session_descriptor *descriptor = NULL; |
1786 | enum lttng_error_code ret_code; | |
00e2e675 | 1787 | |
b178f53e JG |
1788 | if (!name) { |
1789 | ret = -LTTNG_ERR_INVALID; | |
1790 | goto end; | |
00e2e675 DG |
1791 | } |
1792 | ||
bc894455 | 1793 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1794 | if (size < 0) { |
b178f53e JG |
1795 | ret = -LTTNG_ERR_INVALID; |
1796 | goto end; | |
1797 | } | |
1798 | switch (size) { | |
1799 | case 0: | |
1800 | descriptor = lttng_session_descriptor_create(name); | |
1801 | break; | |
1802 | case 1: | |
1803 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1804 | ret = -LTTNG_ERR_INVALID; | |
1805 | goto end; | |
1806 | } | |
1807 | descriptor = lttng_session_descriptor_local_create(name, | |
1808 | uris[0].dst.path); | |
1809 | break; | |
1810 | case 2: | |
1811 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1812 | NULL); | |
1813 | break; | |
1814 | default: | |
1815 | ret = -LTTNG_ERR_INVALID; | |
1816 | goto end; | |
1817 | } | |
1818 | if (!descriptor) { | |
1819 | ret = -LTTNG_ERR_INVALID; | |
1820 | goto end; | |
00e2e675 | 1821 | } |
b178f53e JG |
1822 | ret_code = lttng_create_session_ext(descriptor); |
1823 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1824 | end: | |
1825 | lttng_session_descriptor_destroy(descriptor); | |
1826 | free(uris); | |
1827 | return ret; | |
1828 | } | |
00e2e675 | 1829 | |
b178f53e JG |
1830 | /* |
1831 | * Create a session exclusively used for snapshot. | |
1832 | * | |
780d4bb8 | 1833 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1834 | */ |
1835 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1836 | { | |
1837 | int ret; | |
1838 | enum lttng_error_code ret_code; | |
1839 | ssize_t size; | |
1840 | struct lttng_uri *uris = NULL; | |
1841 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1842 | |
b178f53e JG |
1843 | if (!name) { |
1844 | ret = -LTTNG_ERR_INVALID; | |
1845 | goto end; | |
1846 | } | |
1847 | ||
1848 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1849 | if (size < 0) { | |
1850 | ret = -LTTNG_ERR_INVALID; | |
1851 | goto end; | |
1852 | } | |
1853 | /* | |
1854 | * If the user does not specify a custom subdir, use the session name. | |
1855 | */ | |
1856 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1857 | strlen(uris[0].subdir) == 0) { | |
1858 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1859 | name); | |
1860 | if (ret < 0) { | |
1861 | PERROR("Failed to set session name as network destination sub-directory"); | |
1862 | ret = -LTTNG_ERR_FATAL; | |
1863 | goto end; | |
1864 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1865 | /* Truncated output. */ | |
1866 | ret = -LTTNG_ERR_INVALID; | |
1867 | goto end; | |
1868 | } | |
1869 | } | |
3dd05a85 | 1870 | |
b178f53e JG |
1871 | switch (size) { |
1872 | case 0: | |
1873 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1874 | break; | |
1875 | case 1: | |
1876 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1877 | ret = -LTTNG_ERR_INVALID; | |
1878 | goto end; | |
1879 | } | |
1880 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1881 | name, | |
1882 | uris[0].dst.path); | |
1883 | break; | |
1884 | case 2: | |
1885 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1886 | name, | |
1887 | snapshot_url, | |
1888 | NULL); | |
1889 | break; | |
1890 | default: | |
1891 | ret = -LTTNG_ERR_INVALID; | |
1892 | goto end; | |
1893 | } | |
1894 | if (!descriptor) { | |
1895 | ret = -LTTNG_ERR_INVALID; | |
1896 | goto end; | |
1897 | } | |
1898 | ret_code = lttng_create_session_ext(descriptor); | |
1899 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1900 | end: | |
1901 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1902 | free(uris); |
1903 | return ret; | |
00e2e675 DG |
1904 | } |
1905 | ||
b178f53e JG |
1906 | /* |
1907 | * Create a session exclusively used for live. | |
1908 | * | |
780d4bb8 | 1909 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1910 | */ |
1911 | int lttng_create_session_live(const char *name, const char *url, | |
1912 | unsigned int timer_interval) | |
1913 | { | |
1914 | int ret; | |
1915 | enum lttng_error_code ret_code; | |
1916 | struct lttng_session_descriptor *descriptor = NULL; | |
1917 | ||
1918 | if (!name) { | |
1919 | ret = -LTTNG_ERR_INVALID; | |
1920 | goto end; | |
1921 | } | |
1922 | ||
1923 | if (url) { | |
1924 | descriptor = lttng_session_descriptor_live_network_create( | |
1925 | name, url, NULL, timer_interval); | |
1926 | } else { | |
1927 | descriptor = lttng_session_descriptor_live_create( | |
1928 | name, timer_interval); | |
1929 | } | |
1930 | if (!descriptor) { | |
1931 | ret = -LTTNG_ERR_INVALID; | |
1932 | goto end; | |
1933 | } | |
1934 | ret_code = lttng_create_session_ext(descriptor); | |
1935 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1936 | end: | |
1937 | lttng_session_descriptor_destroy(descriptor); | |
1938 | return ret; | |
1939 | } | |
1940 | ||
e20ee7c2 JD |
1941 | /* |
1942 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
1943 | * |
1944 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
1945 | */ |
1946 | int lttng_destroy_session(const char *session_name) | |
1947 | { | |
1948 | int ret; | |
3e3665b8 JG |
1949 | enum lttng_error_code ret_code; |
1950 | enum lttng_destruction_handle_status status; | |
1951 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
1952 | |
1953 | /* | |
3e3665b8 JG |
1954 | * Stop the tracing and wait for the data to be |
1955 | * consumed. | |
e20ee7c2 JD |
1956 | */ |
1957 | ret = _lttng_stop_tracing(session_name, 1); | |
1958 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
1959 | goto end; | |
1960 | } | |
1961 | ||
3e3665b8 JG |
1962 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
1963 | if (ret_code != LTTNG_OK) { | |
1964 | ret = (int) -ret_code; | |
1965 | goto end; | |
1966 | } | |
1967 | assert(handle); | |
1968 | ||
1969 | /* Block until the completion of the destruction of the session. */ | |
1970 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
1971 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
1972 | ret = -LTTNG_ERR_UNK; | |
1973 | goto end; | |
1974 | } | |
1975 | ||
1976 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
1977 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
1978 | ret = -LTTNG_ERR_UNK; | |
1979 | goto end; | |
1980 | } | |
780d4bb8 | 1981 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 1982 | end: |
3e3665b8 | 1983 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
1984 | return ret; |
1985 | } | |
1986 | ||
1987 | /* | |
1988 | * Destroy the session without waiting for the data. | |
1989 | */ | |
1990 | int lttng_destroy_session_no_wait(const char *session_name) | |
1991 | { | |
3e3665b8 | 1992 | enum lttng_error_code ret_code; |
e20ee7c2 | 1993 | |
3e3665b8 JG |
1994 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
1995 | return ret_code == LTTNG_OK ? ret_code : -ret_code; | |
e20ee7c2 JD |
1996 | } |
1997 | ||
57167058 | 1998 | /* |
9ae110e2 JG |
1999 | * Ask the session daemon for all available sessions. |
2000 | * Sets the contents of the sessions array. | |
2001 | * Returns the number of lttng_session entries in sessions; | |
2002 | * on error, returns a negative value. | |
57167058 | 2003 | */ |
b178f53e | 2004 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2005 | { |
ca95a216 | 2006 | int ret; |
cd80958d | 2007 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2008 | const size_t session_size = sizeof(struct lttng_session) + |
2009 | sizeof(struct lttng_session_extended); | |
2010 | size_t session_count, i; | |
2011 | struct lttng_session_extended *sessions_extended_begin; | |
2012 | struct lttng_session *sessions = NULL; | |
57167058 | 2013 | |
53efb85a | 2014 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2015 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
b178f53e JG |
2016 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2017 | if (ret <= 0) { | |
b178f53e JG |
2018 | goto end; |
2019 | } | |
2020 | if (!sessions) { | |
2021 | ret = -LTTNG_ERR_FATAL; | |
2022 | goto end; | |
2023 | } | |
2024 | ||
2025 | if (ret % session_size) { | |
2026 | ret = -LTTNG_ERR_UNK; | |
2027 | free(sessions); | |
2028 | *out_sessions = NULL; | |
2029 | goto end; | |
57167058 | 2030 | } |
b178f53e JG |
2031 | session_count = (size_t) ret / session_size; |
2032 | sessions_extended_begin = (struct lttng_session_extended *) | |
2033 | (&sessions[session_count]); | |
57167058 | 2034 | |
b178f53e JG |
2035 | /* Set extended session info pointers. */ |
2036 | for (i = 0; i < session_count; i++) { | |
2037 | struct lttng_session *session = &sessions[i]; | |
2038 | struct lttng_session_extended *extended = | |
2039 | &(sessions_extended_begin[i]); | |
2040 | ||
2041 | session->extended.ptr = extended; | |
2042 | } | |
2043 | ||
2044 | ret = (int) session_count; | |
2045 | *out_sessions = sessions; | |
2046 | end: | |
2047 | return ret; | |
2048 | } | |
2049 | ||
2050 | enum lttng_error_code lttng_session_get_creation_time( | |
2051 | const struct lttng_session *session, uint64_t *creation_time) | |
2052 | { | |
2053 | enum lttng_error_code ret = LTTNG_OK; | |
2054 | struct lttng_session_extended *extended; | |
2055 | ||
2056 | if (!session || !creation_time || !session->extended.ptr) { | |
2057 | ret = LTTNG_ERR_INVALID; | |
2058 | goto end; | |
2059 | } | |
2060 | ||
2061 | extended = session->extended.ptr; | |
2062 | if (!extended->creation_time.is_set) { | |
2063 | /* Not created on the session daemon yet. */ | |
2064 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2065 | goto end; | |
2066 | } | |
2067 | *creation_time = extended->creation_time.value; | |
2068 | end: | |
2069 | return ret; | |
57167058 DG |
2070 | } |
2071 | ||
d7ba1388 MD |
2072 | int lttng_set_session_shm_path(const char *session_name, |
2073 | const char *shm_path) | |
2074 | { | |
2075 | struct lttcomm_session_msg lsm; | |
2076 | ||
2077 | if (session_name == NULL) { | |
2078 | return -LTTNG_ERR_INVALID; | |
2079 | } | |
2080 | ||
2081 | memset(&lsm, 0, sizeof(lsm)); | |
2082 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2083 | ||
2084 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
2085 | sizeof(lsm.session.name)); | |
2086 | lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, | |
2087 | sizeof(lsm.u.set_shm_path.shm_path)); | |
2088 | ||
2089 | return lttng_ctl_ask_sessiond(&lsm, NULL); | |
2090 | } | |
2091 | ||
9f19cc17 | 2092 | /* |
9ae110e2 JG |
2093 | * Ask the session daemon for all available domains of a session. |
2094 | * Sets the contents of the domains array. | |
2095 | * Returns the number of lttng_domain entries in domains; | |
2096 | * on error, returns a negative value. | |
9f19cc17 | 2097 | */ |
330be774 | 2098 | int lttng_list_domains(const char *session_name, |
cd80958d | 2099 | struct lttng_domain **domains) |
9f19cc17 DG |
2100 | { |
2101 | int ret; | |
cd80958d DG |
2102 | struct lttcomm_session_msg lsm; |
2103 | ||
330be774 | 2104 | if (session_name == NULL) { |
2f70b271 | 2105 | return -LTTNG_ERR_INVALID; |
cd80958d | 2106 | } |
9f19cc17 | 2107 | |
53efb85a | 2108 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2109 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2110 | ||
cac3069d DG |
2111 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2112 | sizeof(lsm.session.name)); | |
cd80958d | 2113 | |
cac3069d | 2114 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 DG |
2115 | if (ret < 0) { |
2116 | return ret; | |
2117 | } | |
2118 | ||
2119 | return ret / sizeof(struct lttng_domain); | |
2120 | } | |
2121 | ||
2122 | /* | |
9ae110e2 JG |
2123 | * Ask the session daemon for all available channels of a session. |
2124 | * Sets the contents of the channels array. | |
2125 | * Returns the number of lttng_channel entries in channels; | |
2126 | * on error, returns a negative value. | |
9f19cc17 | 2127 | */ |
cd80958d DG |
2128 | int lttng_list_channels(struct lttng_handle *handle, |
2129 | struct lttng_channel **channels) | |
9f19cc17 DG |
2130 | { |
2131 | int ret; | |
53e367f9 JG |
2132 | size_t channel_count, i; |
2133 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2134 | sizeof(struct lttng_channel_extended); |
cd80958d | 2135 | struct lttcomm_session_msg lsm; |
53e367f9 | 2136 | void *extended_at; |
cd80958d | 2137 | |
9d697d3d | 2138 | if (handle == NULL) { |
53e367f9 JG |
2139 | ret = -LTTNG_ERR_INVALID; |
2140 | goto end; | |
cd80958d DG |
2141 | } |
2142 | ||
53efb85a | 2143 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2144 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
cac3069d | 2145 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2146 | sizeof(lsm.session.name)); |
9f19cc17 | 2147 | |
60160d2a | 2148 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2149 | |
cac3069d | 2150 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2151 | if (ret < 0) { |
53e367f9 JG |
2152 | goto end; |
2153 | } | |
2154 | ||
2155 | if (ret % channel_size) { | |
2156 | ret = -LTTNG_ERR_UNK; | |
2157 | free(*channels); | |
2158 | *channels = NULL; | |
2159 | goto end; | |
9f19cc17 | 2160 | } |
53e367f9 | 2161 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2162 | |
53e367f9 JG |
2163 | /* Set extended info pointers */ |
2164 | extended_at = ((void *) *channels) + | |
2165 | channel_count * sizeof(struct lttng_channel); | |
2166 | for (i = 0; i < channel_count; i++) { | |
2167 | struct lttng_channel *chan = &(*channels)[i]; | |
2168 | ||
2169 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2170 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2171 | } |
2172 | ||
2173 | ret = (int) channel_count; | |
2174 | end: | |
2175 | return ret; | |
9f19cc17 DG |
2176 | } |
2177 | ||
2178 | /* | |
9ae110e2 JG |
2179 | * Ask the session daemon for all available events of a session channel. |
2180 | * Sets the contents of the events array. | |
2181 | * Returns the number of lttng_event entries in events; | |
2182 | * on error, returns a negative value. | |
9f19cc17 | 2183 | */ |
cd80958d DG |
2184 | int lttng_list_events(struct lttng_handle *handle, |
2185 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2186 | { |
2187 | int ret; | |
cd80958d | 2188 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
2189 | struct lttcomm_event_command_header *cmd_header = NULL; |
2190 | size_t cmd_header_len; | |
2191 | uint32_t nb_events, i; | |
de453daa | 2192 | void *comm_ext_at; |
de453daa | 2193 | char *reception_buffer = NULL; |
56f0bc67 | 2194 | struct lttng_dynamic_buffer listing; |
de453daa | 2195 | size_t storage_req; |
9f19cc17 | 2196 | |
9d697d3d DG |
2197 | /* Safety check. An handle and channel name are mandatory */ |
2198 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 2199 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
2200 | } |
2201 | ||
53efb85a | 2202 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2203 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
cac3069d | 2204 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
cd80958d | 2205 | sizeof(lsm.session.name)); |
cac3069d | 2206 | lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, |
cd80958d | 2207 | sizeof(lsm.u.list.channel_name)); |
60160d2a | 2208 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2209 | |
a04d53fc | 2210 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
2211 | (void **) &reception_buffer, (void **) &cmd_header, |
2212 | &cmd_header_len); | |
9f19cc17 | 2213 | if (ret < 0) { |
de453daa | 2214 | goto end; |
9f19cc17 DG |
2215 | } |
2216 | ||
d9f484bc JG |
2217 | if (!cmd_header) { |
2218 | ret = -LTTNG_ERR_UNK; | |
2219 | goto end; | |
2220 | } | |
2221 | ||
b4e3ceb9 PP |
2222 | /* Set number of events and free command header */ |
2223 | nb_events = cmd_header->nb_events; | |
2224 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2225 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2226 | goto end; |
b4e3ceb9 | 2227 | } |
b4e3ceb9 PP |
2228 | free(cmd_header); |
2229 | cmd_header = NULL; | |
2230 | ||
de453daa JG |
2231 | /* |
2232 | * The buffer that is returned must contain a "flat" version of | |
2233 | * the events that are returned. In other words, all pointers | |
2234 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2235 | * buffer so that the user may free everything by simply calling free() |
2236 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2237 | * compatibility. |
2238 | * | |
56f0bc67 JG |
2239 | * A first pass is performed to compute the size of the buffer that |
2240 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2241 | * the returned events so that their members always point within the |
2242 | * buffer. | |
2243 | * | |
2244 | * The layout of the returned buffer is as follows: | |
2245 | * - struct lttng_event[nb_events], | |
2246 | * - nb_events times the following: | |
2247 | * - struct lttng_event_extended, | |
2248 | * - flattened version of userspace_probe_location | |
2249 | * - filter_expression | |
2250 | * - exclusions | |
2251 | * - padding to align to 64-bits | |
2252 | */ | |
2253 | comm_ext_at = reception_buffer + | |
2254 | (nb_events * sizeof(struct lttng_event)); | |
2255 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
2256 | |
2257 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
2258 | struct lttcomm_event_extended_header *ext_comm = |
2259 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 2260 | int probe_storage_req = 0; |
b4e3ceb9 | 2261 | |
de453daa JG |
2262 | comm_ext_at += sizeof(*ext_comm); |
2263 | comm_ext_at += ext_comm->filter_len; | |
2264 | comm_ext_at += | |
2265 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2266 | ||
56f0bc67 JG |
2267 | if (ext_comm->userspace_probe_location_len) { |
2268 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2269 | struct lttng_buffer_view probe_location_view; | |
2270 | ||
2271 | probe_location_view = lttng_buffer_view_init( | |
2272 | comm_ext_at, 0, | |
2273 | ext_comm->userspace_probe_location_len); | |
2274 | ||
2275 | /* | |
2276 | * Create a temporary userspace probe location to | |
2277 | * determine the size needed by a "flattened" version | |
2278 | * of that same probe location. | |
2279 | */ | |
2280 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2281 | &probe_location_view, &probe_location); | |
2282 | if (ret < 0) { | |
2283 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2284 | goto end; | |
2285 | } | |
2286 | ||
2287 | ret = lttng_userspace_probe_location_flatten( | |
2288 | probe_location, NULL); | |
2289 | lttng_userspace_probe_location_destroy(probe_location); | |
2290 | if (ret < 0) { | |
2291 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2292 | goto end; | |
2293 | } | |
2294 | ||
2295 | probe_storage_req = ret; | |
2296 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2297 | } |
2298 | ||
de453daa | 2299 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2300 | storage_req += ext_comm->filter_len; |
2301 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2302 | /* Padding to ensure the flat probe is aligned. */ |
2303 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2304 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2305 | } |
2306 | ||
56f0bc67 JG |
2307 | lttng_dynamic_buffer_init(&listing); |
2308 | /* | |
2309 | * We must ensure that "listing" is never resized so as to preserve | |
2310 | * the validity of the flattened objects. | |
2311 | */ | |
2312 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2313 | if (ret) { | |
2314 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2315 | goto end; |
2316 | } | |
56f0bc67 JG |
2317 | |
2318 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2319 | nb_events * sizeof(struct lttng_event)); | |
2320 | if (ret) { | |
2321 | ret = -LTTNG_ERR_NOMEM; | |
2322 | goto free_dynamic_buffer; | |
2323 | } | |
de453daa JG |
2324 | |
2325 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2326 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2327 | for (i = 0; i < nb_events; i++) { |
2328 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2329 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2330 | struct lttcomm_event_extended_header *ext_comm = |
2331 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2332 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2333 | (struct lttng_event_extended *) |
2334 | (listing.data + listing.size); | |
de453daa | 2335 | |
56f0bc67 JG |
2336 | /* Insert struct lttng_event_extended. */ |
2337 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2338 | listing.size + sizeof(*event_extended)); | |
2339 | if (ret) { | |
2340 | ret = -LTTNG_ERR_NOMEM; | |
2341 | goto free_dynamic_buffer; | |
2342 | } | |
de453daa | 2343 | event->extended.ptr = event_extended; |
56f0bc67 | 2344 | |
de453daa JG |
2345 | comm_ext_at += sizeof(*ext_comm); |
2346 | ||
56f0bc67 JG |
2347 | /* Insert filter expression. */ |
2348 | if (ext_comm->filter_len) { | |
2349 | event_extended->filter_expression = listing.data + | |
2350 | listing.size; | |
2351 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2352 | ext_comm->filter_len); | |
2353 | if (ret) { | |
2354 | ret = -LTTNG_ERR_NOMEM; | |
2355 | goto free_dynamic_buffer; | |
2356 | } | |
2357 | comm_ext_at += ext_comm->filter_len; | |
2358 | } | |
2359 | ||
2360 | /* Insert exclusions. */ | |
2361 | if (ext_comm->nb_exclusions) { | |
2362 | event_extended->exclusions.count = | |
2363 | ext_comm->nb_exclusions; | |
2364 | event_extended->exclusions.strings = | |
2365 | listing.data + listing.size; | |
2366 | ||
2367 | ret = lttng_dynamic_buffer_append(&listing, | |
2368 | comm_ext_at, | |
2369 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2370 | if (ret) { | |
2371 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2372 | goto free_dynamic_buffer; |
56f0bc67 JG |
2373 | } |
2374 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2375 | } | |
2376 | ||
2377 | /* Insert padding to align to 64-bits. */ | |
2378 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2379 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2380 | if (ret) { | |
2381 | ret = -LTTNG_ERR_NOMEM; | |
2382 | goto free_dynamic_buffer; | |
2383 | } | |
2384 | ||
2385 | /* Insert flattened userspace probe location. */ | |
2386 | if (ext_comm->userspace_probe_location_len) { | |
2387 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2388 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2389 | |
56f0bc67 JG |
2390 | probe_location_view = lttng_buffer_view_init( |
2391 | comm_ext_at, 0, | |
2392 | ext_comm->userspace_probe_location_len); | |
de453daa | 2393 | |
56f0bc67 JG |
2394 | ret = lttng_userspace_probe_location_create_from_buffer( |
2395 | &probe_location_view, &probe_location); | |
2396 | if (ret < 0) { | |
2397 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2398 | goto free_dynamic_buffer; | |
2399 | } | |
2400 | ||
2401 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2402 | (listing.data + listing.size); | |
2403 | ret = lttng_userspace_probe_location_flatten( | |
2404 | probe_location, &listing); | |
2405 | lttng_userspace_probe_location_destroy(probe_location); | |
2406 | if (ret < 0) { | |
2407 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2408 | goto free_dynamic_buffer; | |
2409 | } | |
2410 | ||
2411 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2412 | } | |
de453daa JG |
2413 | } |
2414 | ||
56f0bc67 JG |
2415 | /* Don't reset listing buffer as we return its content. */ |
2416 | *events = (struct lttng_event *) listing.data; | |
2417 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2418 | ret = (int) nb_events; |
56f0bc67 JG |
2419 | free_dynamic_buffer: |
2420 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2421 | end: |
b4e3ceb9 | 2422 | free(cmd_header); |
de453daa | 2423 | free(reception_buffer); |
b4e3ceb9 | 2424 | return ret; |
9f19cc17 DG |
2425 | } |
2426 | ||
fac6795d | 2427 | /* |
1c8d13c8 TD |
2428 | * Sets the tracing_group variable with name. |
2429 | * This function allocates memory pointed to by tracing_group. | |
2430 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2431 | */ |
2432 | int lttng_set_tracing_group(const char *name) | |
2433 | { | |
9d697d3d | 2434 | if (name == NULL) { |
2f70b271 | 2435 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2436 | } |
2437 | ||
fac6795d | 2438 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2439 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2440 | } |
2441 | ||
2442 | return 0; | |
2443 | } | |
2444 | ||
cd80958d | 2445 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2446 | struct lttng_calibrate *calibrate) |
2447 | { | |
b812e5ca PP |
2448 | /* |
2449 | * This command was removed in LTTng 2.9. | |
2450 | */ | |
2451 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2452 | } |
2453 | ||
5edd7e09 DG |
2454 | /* |
2455 | * Set default channel attributes. | |
441c16a7 | 2456 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2457 | */ |
2458 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2459 | struct lttng_channel_attr *attr) | |
2460 | { | |
294851b0 | 2461 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2462 | |
5edd7e09 DG |
2463 | /* Safety check */ |
2464 | if (attr == NULL || domain == NULL) { | |
2465 | return; | |
2466 | } | |
2467 | ||
294851b0 | 2468 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2469 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2470 | ||
0a9c6494 DG |
2471 | /* Same for all domains. */ |
2472 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2473 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2474 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2475 | ||
5edd7e09 DG |
2476 | switch (domain->type) { |
2477 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2478 | attr->switch_timer_interval = |
2479 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2480 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2481 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2482 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2483 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2484 | if (extended) { |
2485 | extended->monitor_timer_interval = | |
2486 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2487 | extended->blocking_timeout = |
2488 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2489 | } |
5edd7e09 DG |
2490 | break; |
2491 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2492 | switch (domain->buf_type) { |
2493 | case LTTNG_BUFFER_PER_UID: | |
2494 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2495 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2496 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2497 | attr->switch_timer_interval = |
2498 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2499 | attr->read_timer_interval = | |
2500 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2501 | if (extended) { |
2502 | extended->monitor_timer_interval = | |
2503 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2504 | extended->blocking_timeout = |
2505 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2506 | } |
0a9c6494 DG |
2507 | break; |
2508 | case LTTNG_BUFFER_PER_PID: | |
2509 | default: | |
2510 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2511 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2512 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2513 | attr->switch_timer_interval = |
2514 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2515 | attr->read_timer_interval = | |
2516 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2517 | if (extended) { |
2518 | extended->monitor_timer_interval = | |
2519 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2520 | extended->blocking_timeout = |
2521 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2522 | } |
0a9c6494 DG |
2523 | break; |
2524 | } | |
5edd7e09 | 2525 | default: |
441c16a7 | 2526 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2527 | break; |
2528 | } | |
cf0bcb51 JG |
2529 | |
2530 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2531 | } |
2532 | ||
5ba3702f JG |
2533 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2534 | uint64_t *discarded_events) | |
2535 | { | |
2536 | int ret = 0; | |
cf0bcb51 | 2537 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2538 | |
2539 | if (!channel || !discarded_events) { | |
2540 | ret = -LTTNG_ERR_INVALID; | |
2541 | goto end; | |
2542 | } | |
2543 | ||
2544 | chan_ext = channel->attr.extended.ptr; | |
2545 | if (!chan_ext) { | |
2546 | /* | |
2547 | * This can happen since the lttng_channel structure is | |
2548 | * used for other tasks where this pointer is never set. | |
2549 | */ | |
2550 | *discarded_events = 0; | |
2551 | goto end; | |
2552 | } | |
2553 | ||
2554 | *discarded_events = chan_ext->discarded_events; | |
2555 | end: | |
2556 | return ret; | |
2557 | } | |
2558 | ||
2559 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2560 | uint64_t *lost_packets) | |
2561 | { | |
2562 | int ret = 0; | |
cf0bcb51 | 2563 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2564 | |
2565 | if (!channel || !lost_packets) { | |
2566 | ret = -LTTNG_ERR_INVALID; | |
2567 | goto end; | |
2568 | } | |
2569 | ||
2570 | chan_ext = channel->attr.extended.ptr; | |
2571 | if (!chan_ext) { | |
2572 | /* | |
2573 | * This can happen since the lttng_channel structure is | |
2574 | * used for other tasks where this pointer is never set. | |
2575 | */ | |
2576 | *lost_packets = 0; | |
2577 | goto end; | |
2578 | } | |
2579 | ||
2580 | *lost_packets = chan_ext->lost_packets; | |
2581 | end: | |
2582 | return ret; | |
2583 | } | |
2584 | ||
cf0bcb51 JG |
2585 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2586 | uint64_t *monitor_timer_interval) | |
2587 | { | |
2588 | int ret = 0; | |
2589 | ||
2590 | if (!chan || !monitor_timer_interval) { | |
2591 | ret = -LTTNG_ERR_INVALID; | |
2592 | goto end; | |
2593 | } | |
2594 | ||
2595 | if (!chan->attr.extended.ptr) { | |
2596 | ret = -LTTNG_ERR_INVALID; | |
2597 | goto end; | |
2598 | } | |
2599 | ||
2600 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2601 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2602 | end: | |
2603 | return ret; | |
2604 | } | |
2605 | ||
2606 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2607 | uint64_t monitor_timer_interval) | |
2608 | { | |
2609 | int ret = 0; | |
2610 | ||
2611 | if (!chan || !chan->attr.extended.ptr) { | |
2612 | ret = -LTTNG_ERR_INVALID; | |
2613 | goto end; | |
2614 | } | |
2615 | ||
2616 | ((struct lttng_channel_extended *) | |
2617 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2618 | monitor_timer_interval; | |
2619 | end: | |
2620 | return ret; | |
2621 | } | |
2622 | ||
491d1539 MD |
2623 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2624 | int64_t *blocking_timeout) | |
2625 | { | |
2626 | int ret = 0; | |
2627 | ||
2628 | if (!chan || !blocking_timeout) { | |
2629 | ret = -LTTNG_ERR_INVALID; | |
2630 | goto end; | |
2631 | } | |
2632 | ||
2633 | if (!chan->attr.extended.ptr) { | |
2634 | ret = -LTTNG_ERR_INVALID; | |
2635 | goto end; | |
2636 | } | |
2637 | ||
2638 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2639 | chan->attr.extended.ptr)->blocking_timeout; | |
2640 | end: | |
2641 | return ret; | |
2642 | } | |
2643 | ||
2644 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2645 | int64_t blocking_timeout) | |
2646 | { | |
2647 | int ret = 0; | |
2648 | int64_t msec_timeout; | |
2649 | ||
2650 | if (!chan || !chan->attr.extended.ptr) { | |
2651 | ret = -LTTNG_ERR_INVALID; | |
2652 | goto end; | |
2653 | } | |
2654 | ||
2655 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2656 | ret = -LTTNG_ERR_INVALID; | |
2657 | goto end; | |
2658 | } | |
2659 | ||
2660 | /* | |
2661 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2662 | * us to accept a narrower range of values (msecs expressed as a signed | |
2663 | * 32-bit integer). | |
2664 | */ | |
2665 | msec_timeout = blocking_timeout / 1000; | |
2666 | if (msec_timeout != (int32_t) msec_timeout) { | |
2667 | ret = -LTTNG_ERR_INVALID; | |
2668 | goto end; | |
2669 | } | |
2670 | ||
2671 | ((struct lttng_channel_extended *) | |
2672 | chan->attr.extended.ptr)->blocking_timeout = | |
2673 | blocking_timeout; | |
2674 | end: | |
2675 | return ret; | |
2676 | } | |
2677 | ||
fac6795d | 2678 | /* |
2269e89e | 2679 | * Check if session daemon is alive. |
fac6795d | 2680 | * |
2269e89e | 2681 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2682 | * On error returns a negative value. |
fac6795d | 2683 | */ |
947308c4 | 2684 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2685 | { |
2686 | int ret; | |
2687 | ||
2688 | ret = set_session_daemon_path(); | |
2689 | if (ret < 0) { | |
9ae110e2 | 2690 | /* Error. */ |
fac6795d DG |
2691 | return ret; |
2692 | } | |
2693 | ||
9d035200 | 2694 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2695 | /* |
9ae110e2 JG |
2696 | * No socket path set. Weird error which means the constructor |
2697 | * was not called. | |
2f70b271 DG |
2698 | */ |
2699 | assert(0); | |
fac6795d DG |
2700 | } |
2701 | ||
2269e89e | 2702 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2703 | if (ret < 0) { |
9ae110e2 | 2704 | /* Not alive. */ |
7d8234d9 MD |
2705 | return 0; |
2706 | } | |
7d8234d9 | 2707 | |
9ae110e2 | 2708 | /* Is alive. */ |
947308c4 | 2709 | return 1; |
fac6795d DG |
2710 | } |
2711 | ||
00e2e675 | 2712 | /* |
a4b92340 | 2713 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2714 | * |
2715 | * Return 0 on success, else a negative value. | |
2716 | */ | |
a4b92340 DG |
2717 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2718 | const char *control_url, const char *data_url) | |
00e2e675 | 2719 | { |
3dd05a85 | 2720 | int ret; |
a4b92340 | 2721 | ssize_t size; |
00e2e675 | 2722 | struct lttcomm_session_msg lsm; |
a4b92340 | 2723 | struct lttng_uri *uris = NULL; |
00e2e675 | 2724 | |
a4b92340 | 2725 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
2f70b271 | 2726 | return -LTTNG_ERR_INVALID; |
00e2e675 DG |
2727 | } |
2728 | ||
a4b92340 DG |
2729 | memset(&lsm, 0, sizeof(lsm)); |
2730 | ||
00e2e675 DG |
2731 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2732 | ||
cac3069d | 2733 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
00e2e675 | 2734 | sizeof(lsm.session.name)); |
60160d2a | 2735 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2736 | |
bc894455 | 2737 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2738 | if (size < 0) { |
2f70b271 | 2739 | return -LTTNG_ERR_INVALID; |
a4b92340 DG |
2740 | } |
2741 | ||
2742 | lsm.u.uri.size = size; | |
00e2e675 | 2743 | |
795a978d | 2744 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2745 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2746 | |
2747 | free(uris); | |
2748 | return ret; | |
00e2e675 DG |
2749 | } |
2750 | ||
2751 | /* | |
9c6bda17 | 2752 | * [OBSOLETE] |
00e2e675 | 2753 | */ |
2ec40111 | 2754 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2755 | int lttng_enable_consumer(struct lttng_handle *handle) |
2756 | { | |
785d2d0d | 2757 | return -ENOSYS; |
00e2e675 DG |
2758 | } |
2759 | ||
2760 | /* | |
9c6bda17 | 2761 | * [OBSOLETE] |
00e2e675 | 2762 | */ |
2ec40111 | 2763 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2764 | int lttng_disable_consumer(struct lttng_handle *handle) |
2765 | { | |
785d2d0d | 2766 | return -ENOSYS; |
00e2e675 DG |
2767 | } |
2768 | ||
07424f16 | 2769 | /* |
b178f53e | 2770 | * [OBSOLETE] |
07424f16 | 2771 | */ |
2ec40111 SM |
2772 | int _lttng_create_session_ext(const char *name, const char *url, |
2773 | const char *datetime); | |
07424f16 DG |
2774 | int _lttng_create_session_ext(const char *name, const char *url, |
2775 | const char *datetime) | |
2776 | { | |
b178f53e | 2777 | return -ENOSYS; |
07424f16 DG |
2778 | } |
2779 | ||
806e2684 DG |
2780 | /* |
2781 | * For a given session name, this call checks if the data is ready to be read | |
2782 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2783 | * any readers. | |
2784 | */ | |
6d805429 | 2785 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2786 | { |
2787 | int ret; | |
2788 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2789 | uint8_t *pending = NULL; |
806e2684 DG |
2790 | |
2791 | if (session_name == NULL) { | |
2792 | return -LTTNG_ERR_INVALID; | |
2793 | } | |
2794 | ||
53efb85a | 2795 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2796 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2797 | |
cac3069d DG |
2798 | lttng_ctl_copy_string(lsm.session.name, session_name, |
2799 | sizeof(lsm.session.name)); | |
806e2684 | 2800 | |
f6151c55 JG |
2801 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2802 | if (ret < 0) { | |
2803 | goto end; | |
2804 | } else if (ret != 1) { | |
2805 | /* Unexpected payload size */ | |
2806 | ret = -LTTNG_ERR_INVALID; | |
2807 | goto end; | |
e848d36d JG |
2808 | } else if (!pending) { |
2809 | /* Internal error. */ | |
2810 | ret = -LTTNG_ERR_UNK; | |
2811 | goto end; | |
806e2684 DG |
2812 | } |
2813 | ||
f6151c55 JG |
2814 | ret = (int) *pending; |
2815 | end: | |
2816 | free(pending); | |
806e2684 DG |
2817 | return ret; |
2818 | } | |
2819 | ||
a5dfbb9d | 2820 | /* |
55c9e7ca | 2821 | * List IDs in the tracker. |
a5dfbb9d | 2822 | * |
55c9e7ca JR |
2823 | * tracker_type is the type of tracker. |
2824 | * ids is set to an allocated array of IDs currently tracked. On | |
2d97a006 | 2825 | * success, ids and contained ids must be freed/destroy by the caller. |
55c9e7ca | 2826 | * nr_ids is set to the number of entries contained by the ids array. |
a5dfbb9d MD |
2827 | * |
2828 | * Returns 0 on success, else a negative LTTng error code. | |
2829 | */ | |
55c9e7ca JR |
2830 | int lttng_list_tracker_ids(struct lttng_handle *handle, |
2831 | enum lttng_tracker_type tracker_type, | |
a7a533cd | 2832 | struct lttng_tracker_ids **_ids) |
a5dfbb9d | 2833 | { |
55c9e7ca | 2834 | int ret, i; |
a5dfbb9d | 2835 | struct lttcomm_session_msg lsm; |
55c9e7ca JR |
2836 | struct lttcomm_tracker_command_header *cmd_header = NULL; |
2837 | char *cmd_payload = NULL, *p; | |
2838 | size_t cmd_header_len; | |
2839 | size_t nr_ids = 0; | |
a7a533cd | 2840 | struct lttng_tracker_ids *ids = NULL; |
a5dfbb9d MD |
2841 | |
2842 | if (handle == NULL) { | |
2843 | return -LTTNG_ERR_INVALID; | |
2844 | } | |
2845 | ||
2846 | memset(&lsm, 0, sizeof(lsm)); | |
55c9e7ca JR |
2847 | lsm.cmd_type = LTTNG_LIST_TRACKER_IDS; |
2848 | lsm.u.id_tracker_list.tracker_type = tracker_type; | |
a5dfbb9d MD |
2849 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, |
2850 | sizeof(lsm.session.name)); | |
60160d2a | 2851 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
a5dfbb9d | 2852 | |
55c9e7ca JR |
2853 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
2854 | (void **) &cmd_payload, (void **) &cmd_header, | |
2855 | &cmd_header_len); | |
a5dfbb9d | 2856 | if (ret < 0) { |
55c9e7ca JR |
2857 | goto error; |
2858 | } | |
2859 | ||
2860 | /* Set number of tracker_id and free command header */ | |
2861 | nr_ids = cmd_header->nb_tracker_id; | |
2862 | if (nr_ids > INT_MAX) { | |
2863 | ret = -LTTNG_ERR_OVERFLOW; | |
2864 | goto error; | |
2865 | } | |
2866 | free(cmd_header); | |
2867 | cmd_header = NULL; | |
2868 | ||
a7a533cd | 2869 | ids = lttng_tracker_ids_create(nr_ids); |
55c9e7ca JR |
2870 | if (!ids) { |
2871 | ret = -LTTNG_ERR_NOMEM; | |
2872 | goto error; | |
2873 | } | |
2874 | ||
2875 | p = cmd_payload; | |
2876 | for (i = 0; i < nr_ids; i++) { | |
2877 | struct lttcomm_tracker_id_header *tracker_id; | |
2878 | struct lttng_tracker_id *id; | |
2d97a006 | 2879 | enum lttng_tracker_id_status status; |
55c9e7ca JR |
2880 | |
2881 | tracker_id = (struct lttcomm_tracker_id_header *) p; | |
2882 | p += sizeof(struct lttcomm_tracker_id_header); | |
a7a533cd | 2883 | id = lttng_tracker_ids_get_pointer_of_index(ids, i); |
2d97a006 | 2884 | if (!id) { |
a7a533cd | 2885 | ret = -LTTNG_ERR_INVALID; |
2d97a006 JR |
2886 | goto error; |
2887 | } | |
55c9e7ca | 2888 | |
55c9e7ca JR |
2889 | switch (tracker_id->type) { |
2890 | case LTTNG_ID_ALL: | |
2d97a006 | 2891 | status = lttng_tracker_id_set_all(id); |
55c9e7ca JR |
2892 | break; |
2893 | case LTTNG_ID_VALUE: | |
2894 | id->value = tracker_id->u.value; | |
2d97a006 JR |
2895 | status = lttng_tracker_id_set_value( |
2896 | id, tracker_id->u.value); | |
55c9e7ca JR |
2897 | break; |
2898 | case LTTNG_ID_STRING: | |
2d97a006 | 2899 | status = lttng_tracker_id_set_string(id, p); |
55c9e7ca JR |
2900 | p += tracker_id->u.var_data_len; |
2901 | break; | |
2902 | default: | |
2903 | goto error; | |
2904 | } | |
2d97a006 JR |
2905 | |
2906 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
2907 | ret = -LTTNG_ERR_INVALID; | |
2908 | goto error; | |
2909 | } | |
55c9e7ca JR |
2910 | } |
2911 | free(cmd_payload); | |
2912 | *_ids = ids; | |
55c9e7ca JR |
2913 | return 0; |
2914 | ||
2915 | error: | |
a7a533cd | 2916 | lttng_tracker_ids_destroy(ids); |
55c9e7ca JR |
2917 | free(cmd_payload); |
2918 | free(cmd_header); | |
2919 | return ret; | |
2920 | } | |
2921 | ||
2922 | /* | |
2923 | * List PIDs in the tracker. | |
2924 | * | |
2925 | * enabled is set to whether the PID tracker is enabled. | |
2926 | * pids is set to an allocated array of PIDs currently tracked. On | |
2927 | * success, pids must be freed by the caller. | |
2928 | * nr_pids is set to the number of entries contained by the pids array. | |
2929 | * | |
2930 | * Returns 0 on success, else a negative LTTng error code. | |
2931 | */ | |
2932 | int lttng_list_tracker_pids(struct lttng_handle *handle, | |
2933 | int *_enabled, int32_t **_pids, size_t *_nr_pids) | |
2934 | { | |
a7a533cd | 2935 | struct lttng_tracker_ids *ids = NULL; |
e283e4a0 | 2936 | unsigned int nr_ids = 0; |
55c9e7ca JR |
2937 | int *pids = NULL; |
2938 | int ret = 0, i; | |
2d97a006 | 2939 | enum lttng_tracker_id_status status; |
a7a533cd | 2940 | const struct lttng_tracker_id *id; |
55c9e7ca | 2941 | |
a7a533cd JR |
2942 | ret = lttng_list_tracker_ids(handle, LTTNG_TRACKER_PID, &ids); |
2943 | if (ret < 0) { | |
a5dfbb9d | 2944 | return ret; |
a7a533cd | 2945 | } |
55c9e7ca | 2946 | |
e283e4a0 JR |
2947 | status = lttng_tracker_ids_get_count(ids, &nr_ids); |
2948 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
2949 | ret = -LTTNG_ERR_INVALID; | |
2950 | goto end; | |
2951 | } | |
a7a533cd JR |
2952 | |
2953 | if (nr_ids == 1) { | |
2954 | id = lttng_tracker_ids_get_at_index(ids, 0); | |
2955 | if (id && lttng_tracker_id_get_type(id) == LTTNG_ID_ALL) { | |
2956 | *_enabled = 0; | |
2957 | goto end; | |
2958 | } | |
a5dfbb9d | 2959 | } |
a7a533cd | 2960 | |
55c9e7ca JR |
2961 | *_enabled = 1; |
2962 | ||
2963 | pids = zmalloc(nr_ids * sizeof(*pids)); | |
2964 | if (!pids) { | |
2965 | ret = -LTTNG_ERR_NOMEM; | |
2966 | goto end; | |
de8218d4 | 2967 | } |
55c9e7ca | 2968 | for (i = 0; i < nr_ids; i++) { |
a7a533cd | 2969 | id = lttng_tracker_ids_get_at_index(ids, i); |
2d97a006 JR |
2970 | status = lttng_tracker_id_get_value(id, &pids[i]); |
2971 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
55c9e7ca JR |
2972 | ret = -LTTNG_ERR_UNK; |
2973 | goto end; | |
2974 | } | |
a5dfbb9d | 2975 | } |
a5dfbb9d | 2976 | *_pids = pids; |
55c9e7ca JR |
2977 | *_nr_pids = nr_ids; |
2978 | end: | |
a7a533cd | 2979 | lttng_tracker_ids_destroy(ids); |
55c9e7ca JR |
2980 | if (ret < 0) { |
2981 | free(pids); | |
2982 | } | |
2983 | return ret; | |
a5dfbb9d MD |
2984 | } |
2985 | ||
93ec662e JD |
2986 | /* |
2987 | * Regenerate the metadata for a session. | |
2988 | * Return 0 on success, a negative error code on error. | |
2989 | */ | |
eded6438 | 2990 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2991 | { |
2992 | int ret; | |
2993 | struct lttcomm_session_msg lsm; | |
2994 | ||
2995 | if (!session_name) { | |
2996 | ret = -LTTNG_ERR_INVALID; | |
2997 | goto end; | |
2998 | } | |
2999 | ||
3000 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 3001 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e JD |
3002 | |
3003 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
3004 | sizeof(lsm.session.name)); | |
3005 | ||
3006 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3007 | if (ret < 0) { | |
3008 | goto end; | |
3009 | } | |
3010 | ||
3011 | ret = 0; | |
3012 | end: | |
3013 | return ret; | |
3014 | } | |
3015 | ||
eded6438 JD |
3016 | /* |
3017 | * Deprecated, replaced by lttng_regenerate_metadata. | |
3018 | */ | |
3019 | int lttng_metadata_regenerate(const char *session_name) | |
3020 | { | |
3021 | return lttng_regenerate_metadata(session_name); | |
3022 | } | |
3023 | ||
c2561365 JD |
3024 | /* |
3025 | * Regenerate the statedump of a session. | |
3026 | * Return 0 on success, a negative error code on error. | |
3027 | */ | |
3028 | int lttng_regenerate_statedump(const char *session_name) | |
3029 | { | |
3030 | int ret; | |
3031 | struct lttcomm_session_msg lsm; | |
3032 | ||
3033 | if (!session_name) { | |
3034 | ret = -LTTNG_ERR_INVALID; | |
3035 | goto end; | |
3036 | } | |
3037 | ||
3038 | memset(&lsm, 0, sizeof(lsm)); | |
3039 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
3040 | ||
3041 | lttng_ctl_copy_string(lsm.session.name, session_name, | |
3042 | sizeof(lsm.session.name)); | |
3043 | ||
3044 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3045 | if (ret < 0) { | |
3046 | goto end; | |
3047 | } | |
3048 | ||
3049 | ret = 0; | |
3050 | end: | |
3051 | return ret; | |
3052 | } | |
3053 | ||
a58c490f JG |
3054 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3055 | { | |
3056 | int ret; | |
3057 | struct lttcomm_session_msg lsm; | |
3647288f | 3058 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3059 | |
3647288f | 3060 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3061 | if (!trigger) { |
3062 | ret = -LTTNG_ERR_INVALID; | |
3063 | goto end; | |
3064 | } | |
3065 | ||
3066 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 3067 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3068 | goto end; |
3069 | } | |
3070 | ||
3647288f JG |
3071 | ret = lttng_trigger_serialize(trigger, &buffer); |
3072 | if (ret < 0) { | |
a58c490f JG |
3073 | ret = -LTTNG_ERR_UNK; |
3074 | goto end; | |
3075 | } | |
3076 | ||
a58c490f JG |
3077 | memset(&lsm, 0, sizeof(lsm)); |
3078 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
3079 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3080 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3081 | buffer.size, NULL); | |
a58c490f | 3082 | end: |
3647288f | 3083 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3084 | return ret; |
3085 | } | |
3086 | ||
3087 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
3088 | { | |
3089 | int ret; | |
3090 | struct lttcomm_session_msg lsm; | |
3647288f | 3091 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3092 | |
3647288f | 3093 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3094 | if (!trigger) { |
3095 | ret = -LTTNG_ERR_INVALID; | |
3096 | goto end; | |
3097 | } | |
3098 | ||
3099 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 3100 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3101 | goto end; |
3102 | } | |
3103 | ||
3647288f JG |
3104 | ret = lttng_trigger_serialize(trigger, &buffer); |
3105 | if (ret < 0) { | |
a58c490f JG |
3106 | ret = -LTTNG_ERR_UNK; |
3107 | goto end; | |
3108 | } | |
3109 | ||
a58c490f JG |
3110 | memset(&lsm, 0, sizeof(lsm)); |
3111 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
3112 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3113 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3114 | buffer.size, NULL); | |
a58c490f | 3115 | end: |
3647288f | 3116 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3117 | return ret; |
3118 | } | |
3119 | ||
2d97a006 JR |
3120 | static int lttng_track_untrack_id(struct lttng_handle *handle, |
3121 | enum lttng_tracker_type tracker_type, | |
3122 | const struct lttng_tracker_id *id, | |
3123 | enum lttcomm_sessiond_command cmd) | |
3124 | { | |
3125 | int ret; | |
3126 | struct lttcomm_session_msg lsm; | |
6186e5b8 | 3127 | const char *var_data = NULL; |
2d97a006 JR |
3128 | size_t var_data_len = 0; |
3129 | int value; | |
3130 | enum lttng_tracker_id_status status; | |
3131 | ||
3132 | /* NULL arguments are forbidden. No default values. */ | |
3133 | if (handle == NULL) { | |
3134 | goto error; | |
3135 | } | |
3136 | ||
3137 | memset(&lsm, 0, sizeof(lsm)); | |
3138 | ||
3139 | lsm.cmd_type = cmd; | |
3140 | lsm.u.id_tracker.tracker_type = tracker_type; | |
3141 | lsm.u.id_tracker.id_type = lttng_tracker_id_get_type(id); | |
3142 | switch (lsm.u.id_tracker.id_type) { | |
3143 | case LTTNG_ID_ALL: | |
3144 | break; | |
3145 | case LTTNG_ID_VALUE: | |
3146 | status = lttng_tracker_id_get_value(id, &value); | |
3147 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
3148 | goto error; | |
3149 | } | |
3150 | lsm.u.id_tracker.u.value = value; | |
3151 | break; | |
3152 | case LTTNG_ID_STRING: | |
3153 | status = lttng_tracker_id_get_string(id, &var_data); | |
3154 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { | |
3155 | goto error; | |
3156 | } | |
3157 | var_data_len = strlen(var_data) + 1; /* Includes \0. */ | |
3158 | lsm.u.id_tracker.u.var_len = var_data_len; | |
3159 | break; | |
3160 | default: | |
3161 | goto error; | |
3162 | } | |
3163 | ||
3164 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); | |
3165 | ||
3166 | lttng_ctl_copy_string(lsm.session.name, handle->session_name, | |
3167 | sizeof(lsm.session.name)); | |
3168 | ||
3169 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header( | |
3170 | &lsm, (char *) var_data, var_data_len, NULL); | |
3171 | return ret; | |
3172 | error: | |
3173 | return -LTTNG_ERR_INVALID; | |
3174 | } | |
3175 | ||
3176 | /* | |
3177 | * Add ID to session tracker. | |
3178 | * Return 0 on success else a negative LTTng error code. | |
3179 | */ | |
3180 | int lttng_track_id(struct lttng_handle *handle, | |
3181 | enum lttng_tracker_type tracker_type, | |
3182 | const struct lttng_tracker_id *id) | |
3183 | { | |
3184 | return lttng_track_untrack_id(handle, tracker_type, id, LTTNG_TRACK_ID); | |
3185 | } | |
3186 | ||
3187 | /* | |
3188 | * Remove ID from session tracker. | |
3189 | * Return 0 on success else a negative LTTng error code. | |
3190 | */ | |
3191 | int lttng_untrack_id(struct lttng_handle *handle, | |
3192 | enum lttng_tracker_type tracker_type, | |
3193 | const struct lttng_tracker_id *id) | |
3194 | { | |
3195 | return lttng_track_untrack_id( | |
3196 | handle, tracker_type, id, LTTNG_UNTRACK_ID); | |
3197 | } | |
3198 | ||
3199 | /* | |
3200 | * Add PID to session tracker. | |
3201 | * Return 0 on success else a negative LTTng error code. | |
3202 | */ | |
3203 | int lttng_track_pid(struct lttng_handle *handle, int pid) | |
3204 | { | |
3205 | int ret; | |
3206 | struct lttng_tracker_id *id = NULL; | |
3207 | enum lttng_tracker_id_status status; | |
3208 | ||
3209 | id = lttng_tracker_id_create(); | |
3210 | status = lttng_tracker_id_set_value(id, pid); | |
3211 | if (status == LTTNG_TRACKER_ID_STATUS_INVALID) { | |
3212 | ret = -LTTNG_ERR_INVALID; | |
3213 | goto error; | |
3214 | } | |
3215 | ||
3216 | ret = lttng_track_id(handle, LTTNG_TRACKER_PID, id); | |
3217 | error: | |
3218 | lttng_tracker_id_destroy(id); | |
3219 | return ret; | |
3220 | } | |
3221 | ||
3222 | /* | |
3223 | * Remove PID from session tracker. | |
3224 | * Return 0 on success else a negative LTTng error code. | |
3225 | */ | |
3226 | int lttng_untrack_pid(struct lttng_handle *handle, int pid) | |
3227 | { | |
3228 | int ret; | |
3229 | struct lttng_tracker_id *id = NULL; | |
3230 | enum lttng_tracker_id_status status; | |
3231 | ||
3232 | id = lttng_tracker_id_create(); | |
3233 | status = lttng_tracker_id_set_value(id, pid); | |
3234 | if (status == LTTNG_TRACKER_ID_STATUS_INVALID) { | |
3235 | ret = -LTTNG_ERR_INVALID; | |
3236 | goto error; | |
3237 | } | |
3238 | ||
3239 | ret = lttng_untrack_id(handle, LTTNG_TRACKER_PID, id); | |
3240 | error: | |
3241 | lttng_tracker_id_destroy(id); | |
3242 | return ret; | |
3243 | } | |
3244 | ||
fac6795d | 3245 | /* |
9ae110e2 | 3246 | * lib constructor. |
fac6795d | 3247 | */ |
b2b89e8a | 3248 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3249 | { |
3250 | /* Set default session group */ | |
bbccc3d2 | 3251 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3252 | } |
49cca668 DG |
3253 | |
3254 | /* | |
9ae110e2 | 3255 | * lib destructor. |
49cca668 | 3256 | */ |
b2b89e8a | 3257 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3258 | { |
3259 | free(tracing_group); | |
3260 | } |