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> |
f953b297 | 25 | #include <common/dynamic-buffer.h> |
db758600 | 26 | #include <common/sessiond-comm/sessiond-comm.h> |
f953b297 | 27 | #include <common/tracker.h> |
a4b92340 | 28 | #include <common/uri.h> |
feb0f3e5 | 29 | #include <common/utils.h> |
a58c490f | 30 | #include <lttng/channel-internal.h> |
f953b297 JG |
31 | #include <lttng/destruction-handle.h> |
32 | #include <lttng/endpoint.h> | |
de453daa | 33 | #include <lttng/event-internal.h> |
f953b297 JG |
34 | #include <lttng/health-internal.h> |
35 | #include <lttng/lttng.h> | |
b178f53e | 36 | #include <lttng/session-descriptor-internal.h> |
f953b297 JG |
37 | #include <lttng/session-internal.h> |
38 | #include <lttng/trigger/trigger-internal.h> | |
39 | #include <lttng/userspace-probe-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 | |
fac6795d | 88 | /* |
cd80958d | 89 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 90 | * |
cd80958d DG |
91 | * If domain is unknown, default domain will be the kernel. |
92 | */ | |
cac3069d DG |
93 | LTTNG_HIDDEN |
94 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
95 | struct lttng_domain *src) | |
cd80958d DG |
96 | { |
97 | if (src && dst) { | |
98 | switch (src->type) { | |
00e2e675 DG |
99 | case LTTNG_DOMAIN_KERNEL: |
100 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 101 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 102 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 103 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
104 | memcpy(dst, src, sizeof(struct lttng_domain)); |
105 | break; | |
106 | default: | |
107 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 108 | break; |
cd80958d DG |
109 | } |
110 | } | |
111 | } | |
112 | ||
113 | /* | |
114 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 115 | * |
1c8d13c8 TD |
116 | * On success, returns the number of bytes sent (>=0) |
117 | * On error, returns -1 | |
fac6795d | 118 | */ |
cd80958d | 119 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
120 | { |
121 | int ret; | |
122 | ||
123 | if (!connected) { | |
2f70b271 | 124 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 125 | goto end; |
fac6795d DG |
126 | } |
127 | ||
a4b92340 DG |
128 | DBG("LSM cmd type : %d", lsm->cmd_type); |
129 | ||
be040666 | 130 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 131 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
132 | if (ret < 0) { |
133 | ret = -LTTNG_ERR_FATAL; | |
134 | } | |
e065084a DG |
135 | |
136 | end: | |
137 | return ret; | |
138 | } | |
139 | ||
53a80697 MD |
140 | /* |
141 | * Send var len data to the session daemon. | |
142 | * | |
143 | * On success, returns the number of bytes sent (>=0) | |
144 | * On error, returns -1 | |
145 | */ | |
c2d69327 | 146 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
147 | { |
148 | int ret; | |
149 | ||
150 | if (!connected) { | |
2f70b271 | 151 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
152 | goto end; |
153 | } | |
a4b92340 | 154 | |
53a80697 MD |
155 | if (!data || !len) { |
156 | ret = 0; | |
157 | goto end; | |
158 | } | |
159 | ||
160 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
161 | if (ret < 0) { |
162 | ret = -LTTNG_ERR_FATAL; | |
163 | } | |
53a80697 MD |
164 | |
165 | end: | |
166 | return ret; | |
167 | } | |
168 | ||
a04d53fc FD |
169 | /* |
170 | * Send file descriptors to the session daemon. | |
171 | * | |
172 | * On success, returns the number of bytes sent (>=0) | |
173 | * On error, returns -1 | |
174 | */ | |
175 | static int send_session_fds(const int *fds, size_t nb_fd) | |
176 | { | |
177 | int ret; | |
178 | ||
179 | if (!connected) { | |
180 | ret = -LTTNG_ERR_NO_SESSIOND; | |
181 | goto end; | |
182 | } | |
183 | ||
184 | if (!fds || !nb_fd) { | |
185 | ret = 0; | |
186 | goto end; | |
187 | } | |
188 | ||
189 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
190 | if (ret < 0) { | |
191 | ret = -LTTNG_ERR_FATAL; | |
192 | } | |
193 | ||
194 | end: | |
195 | return ret; | |
196 | } | |
197 | ||
e065084a | 198 | /* |
cd80958d | 199 | * Receive data from the sessiond socket. |
e065084a | 200 | * |
1c8d13c8 TD |
201 | * On success, returns the number of bytes received (>=0) |
202 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 203 | */ |
ca95a216 | 204 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
205 | { |
206 | int ret; | |
207 | ||
208 | if (!connected) { | |
2f70b271 | 209 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 210 | goto end; |
fac6795d DG |
211 | } |
212 | ||
ca95a216 | 213 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
214 | if (ret < 0) { |
215 | ret = -LTTNG_ERR_FATAL; | |
216 | } | |
fac6795d | 217 | |
e065084a | 218 | end: |
fac6795d DG |
219 | return ret; |
220 | } | |
221 | ||
222 | /* | |
9ae110e2 | 223 | * Check if we are in the specified group. |
65beb5ff | 224 | * |
9ae110e2 | 225 | * If yes return 1, else return -1. |
947308c4 | 226 | */ |
6c71277b MD |
227 | LTTNG_HIDDEN |
228 | int lttng_check_tracing_group(void) | |
947308c4 | 229 | { |
28ab59d0 | 230 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
231 | int grp_list_size, grp_id, i; |
232 | int ret = -1; | |
6c71277b | 233 | const char *grp_name = tracing_group; |
947308c4 DG |
234 | |
235 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 236 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 237 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
238 | goto end; |
239 | } | |
240 | ||
241 | /* Get number of supplementary group IDs */ | |
242 | grp_list_size = getgroups(0, NULL); | |
243 | if (grp_list_size < 0) { | |
6f04ed72 | 244 | PERROR("getgroups"); |
947308c4 DG |
245 | goto end; |
246 | } | |
247 | ||
248 | /* Alloc group list of the right size */ | |
3f451dc0 | 249 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 250 | if (!grp_list) { |
6f04ed72 | 251 | PERROR("malloc"); |
00795392 MD |
252 | goto end; |
253 | } | |
947308c4 | 254 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 255 | if (grp_id < 0) { |
6f04ed72 | 256 | PERROR("getgroups"); |
947308c4 DG |
257 | goto free_list; |
258 | } | |
259 | ||
260 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 261 | if (grp_list[i] == tracing_gid) { |
2269e89e | 262 | ret = 1; |
947308c4 DG |
263 | break; |
264 | } | |
265 | } | |
266 | ||
267 | free_list: | |
268 | free(grp_list); | |
269 | ||
270 | end: | |
271 | return ret; | |
272 | } | |
273 | ||
09b72f7a FD |
274 | static int check_enough_available_memory(size_t num_bytes_requested_per_cpu) |
275 | { | |
276 | int ret; | |
277 | long num_cpu; | |
278 | size_t best_mem_info; | |
279 | size_t num_bytes_requested_total; | |
280 | ||
281 | /* | |
282 | * Get the number of CPU currently online to compute the amount of | |
283 | * memory needed to create a buffer for every CPU. | |
284 | */ | |
285 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
286 | if (num_cpu == -1) { | |
287 | goto error; | |
288 | } | |
289 | ||
290 | num_bytes_requested_total = num_bytes_requested_per_cpu * num_cpu; | |
291 | ||
292 | /* | |
293 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
294 | * reliable estimate we can get but it is only exposed by the kernel | |
295 | * since 3.14. (See Linux kernel commit: | |
296 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
297 | */ | |
298 | ret = utils_get_memory_available(&best_mem_info); | |
299 | if (ret >= 0) { | |
300 | goto success; | |
301 | } | |
302 | ||
303 | /* | |
304 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
305 | * is a sanity check for obvious user error. | |
306 | */ | |
307 | ret = utils_get_memory_total(&best_mem_info); | |
308 | if (ret >= 0) { | |
309 | goto success; | |
310 | } | |
311 | ||
312 | error: | |
313 | return -1; | |
314 | success: | |
315 | return best_mem_info >= num_bytes_requested_total; | |
316 | } | |
317 | ||
947308c4 | 318 | /* |
2269e89e DG |
319 | * Try connect to session daemon with sock_path. |
320 | * | |
321 | * Return 0 on success, else -1 | |
322 | */ | |
323 | static int try_connect_sessiond(const char *sock_path) | |
324 | { | |
325 | int ret; | |
326 | ||
327 | /* If socket exist, we check if the daemon listens for connect. */ | |
328 | ret = access(sock_path, F_OK); | |
329 | if (ret < 0) { | |
330 | /* Not alive */ | |
2f70b271 | 331 | goto error; |
2269e89e DG |
332 | } |
333 | ||
334 | ret = lttcomm_connect_unix_sock(sock_path); | |
335 | if (ret < 0) { | |
9ae110e2 | 336 | /* Not alive. */ |
2f70b271 | 337 | goto error; |
2269e89e DG |
338 | } |
339 | ||
340 | ret = lttcomm_close_unix_sock(ret); | |
341 | if (ret < 0) { | |
6f04ed72 | 342 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
343 | } |
344 | ||
345 | return 0; | |
2f70b271 DG |
346 | |
347 | error: | |
348 | return -1; | |
2269e89e DG |
349 | } |
350 | ||
351 | /* | |
2f70b271 DG |
352 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
353 | * variable. | |
354 | * | |
355 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
356 | * is somehow too long or ENOMEM). | |
947308c4 DG |
357 | */ |
358 | static int set_session_daemon_path(void) | |
359 | { | |
9ae110e2 | 360 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
361 | uid_t uid; |
362 | ||
363 | uid = getuid(); | |
947308c4 | 364 | |
2269e89e DG |
365 | if (uid != 0) { |
366 | /* Are we in the tracing group ? */ | |
6c71277b | 367 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
368 | } |
369 | ||
08a9c49f | 370 | if ((uid == 0) || in_tgroup) { |
1da0efb1 JG |
371 | const int ret = lttng_strncpy(sessiond_sock_path, |
372 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
373 | sizeof(sessiond_sock_path)); | |
374 | ||
375 | if (ret) { | |
376 | goto error; | |
377 | } | |
08a9c49f | 378 | } |
2269e89e | 379 | |
08a9c49f | 380 | if (uid != 0) { |
c617c0c6 MD |
381 | int ret; |
382 | ||
08a9c49f | 383 | if (in_tgroup) { |
9ae110e2 | 384 | /* Tracing group. */ |
08a9c49f TD |
385 | ret = try_connect_sessiond(sessiond_sock_path); |
386 | if (ret >= 0) { | |
387 | goto end; | |
2269e89e | 388 | } |
08a9c49f | 389 | /* Global session daemon not available... */ |
2269e89e | 390 | } |
08a9c49f TD |
391 | /* ...or not in tracing group (and not root), default */ |
392 | ||
393 | /* | |
9ae110e2 JG |
394 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
395 | * is too small; | |
396 | * With GNU C >= 2.1, snprintf returns the required size | |
397 | * (excluding closing null) | |
08a9c49f TD |
398 | */ |
399 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 400 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 401 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 402 | goto error; |
947308c4 | 403 | } |
947308c4 | 404 | } |
08a9c49f | 405 | end: |
947308c4 | 406 | return 0; |
2f70b271 DG |
407 | |
408 | error: | |
409 | return -1; | |
947308c4 DG |
410 | } |
411 | ||
65beb5ff | 412 | /* |
9ae110e2 | 413 | * Connect to the LTTng session daemon. |
65beb5ff | 414 | * |
3e3665b8 | 415 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 416 | */ |
3e3665b8 | 417 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
418 | { |
419 | int ret; | |
420 | ||
421 | ret = set_session_daemon_path(); | |
422 | if (ret < 0) { | |
2f70b271 | 423 | goto error; |
65beb5ff DG |
424 | } |
425 | ||
9ae110e2 | 426 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
427 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
428 | if (ret < 0) { | |
2f70b271 | 429 | goto error; |
65beb5ff DG |
430 | } |
431 | ||
3e3665b8 | 432 | return ret; |
2f70b271 DG |
433 | |
434 | error: | |
435 | return -1; | |
65beb5ff DG |
436 | } |
437 | ||
3e3665b8 JG |
438 | static void reset_global_sessiond_connection_state(void) |
439 | { | |
440 | sessiond_socket = -1; | |
441 | connected = 0; | |
442 | } | |
443 | ||
65beb5ff | 444 | /* |
1c8d13c8 | 445 | * Clean disconnect from the session daemon. |
9ae110e2 | 446 | * |
1c8d13c8 | 447 | * On success, return 0. On error, return -1. |
65beb5ff DG |
448 | */ |
449 | static int disconnect_sessiond(void) | |
450 | { | |
451 | int ret = 0; | |
452 | ||
453 | if (connected) { | |
454 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 455 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
456 | } |
457 | ||
458 | return ret; | |
459 | } | |
460 | ||
795a978d PP |
461 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
462 | size_t *user_len) | |
463 | { | |
464 | int ret = 0; | |
465 | void *buf = NULL; | |
466 | ||
467 | if (len) { | |
468 | if (!user_len) { | |
469 | ret = -LTTNG_ERR_INVALID; | |
470 | goto end; | |
471 | } | |
472 | ||
473 | buf = zmalloc(len); | |
474 | if (!buf) { | |
475 | ret = -ENOMEM; | |
476 | goto end; | |
477 | } | |
478 | ||
479 | ret = recv_data_sessiond(buf, len); | |
480 | if (ret < 0) { | |
481 | goto end; | |
482 | } | |
483 | ||
484 | if (!user_buf) { | |
485 | ret = -LTTNG_ERR_INVALID; | |
486 | goto end; | |
487 | } | |
488 | ||
489 | /* Move ownership of command header buffer to user. */ | |
490 | *user_buf = buf; | |
491 | buf = NULL; | |
492 | *user_len = len; | |
493 | } else { | |
494 | /* No command header. */ | |
495 | if (user_len) { | |
496 | *user_len = 0; | |
497 | } | |
498 | ||
499 | if (user_buf) { | |
500 | *user_buf = NULL; | |
501 | } | |
502 | } | |
503 | ||
504 | end: | |
505 | free(buf); | |
506 | return ret; | |
507 | } | |
508 | ||
35a6fdb7 | 509 | /* |
cd80958d | 510 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
511 | * Takes extra var. len. data and file descriptors as input to send to the |
512 | * session daemon. | |
65beb5ff | 513 | * |
af87c45a | 514 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 515 | */ |
cac3069d | 516 | LTTNG_HIDDEN |
a04d53fc FD |
517 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
518 | const int *fds, size_t nb_fd, const void *vardata, | |
519 | size_t vardata_len, void **user_payload_buf, | |
520 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
521 | { |
522 | int ret; | |
795a978d | 523 | size_t payload_len; |
cd80958d | 524 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
525 | |
526 | ret = connect_sessiond(); | |
527 | if (ret < 0) { | |
2f70b271 | 528 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 529 | goto end; |
3e3665b8 JG |
530 | } else { |
531 | sessiond_socket = ret; | |
532 | connected = 1; | |
65beb5ff DG |
533 | } |
534 | ||
65beb5ff | 535 | /* Send command to session daemon */ |
cd80958d | 536 | ret = send_session_msg(lsm); |
65beb5ff | 537 | if (ret < 0) { |
2f70b271 | 538 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
539 | goto end; |
540 | } | |
53a80697 | 541 | /* Send var len data */ |
795a978d | 542 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 543 | if (ret < 0) { |
2f70b271 | 544 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
545 | goto end; |
546 | } | |
65beb5ff | 547 | |
a04d53fc FD |
548 | /* Send fds */ |
549 | ret = send_session_fds(fds, nb_fd); | |
550 | if (ret < 0) { | |
551 | /* Ret value is a valid lttng error code. */ | |
552 | goto end; | |
553 | } | |
554 | ||
65beb5ff DG |
555 | /* Get header from data transmission */ |
556 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
557 | if (ret < 0) { | |
2f70b271 | 558 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
559 | goto end; |
560 | } | |
561 | ||
562 | /* Check error code if OK */ | |
f73fabfd | 563 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
564 | ret = -llm.ret_code; |
565 | goto end; | |
566 | } | |
567 | ||
795a978d PP |
568 | /* Get command header from data transmission */ |
569 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
570 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 571 | if (ret < 0) { |
65beb5ff DG |
572 | goto end; |
573 | } | |
574 | ||
795a978d PP |
575 | /* Get payload from data transmission */ |
576 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
577 | &payload_len); | |
578 | if (ret < 0) { | |
83009e5e DG |
579 | goto end; |
580 | } | |
581 | ||
795a978d | 582 | ret = llm.data_size; |
65beb5ff DG |
583 | |
584 | end: | |
585 | disconnect_sessiond(); | |
586 | return ret; | |
587 | } | |
588 | ||
9f19cc17 | 589 | /* |
cd80958d | 590 | * Create lttng handle and return pointer. |
9ae110e2 | 591 | * |
1c8d13c8 | 592 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 593 | */ |
cd80958d DG |
594 | struct lttng_handle *lttng_create_handle(const char *session_name, |
595 | struct lttng_domain *domain) | |
9f19cc17 | 596 | { |
1da0efb1 | 597 | int ret; |
2f70b271 DG |
598 | struct lttng_handle *handle = NULL; |
599 | ||
3f451dc0 | 600 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 601 | if (handle == NULL) { |
2f70b271 | 602 | PERROR("malloc handle"); |
cd80958d DG |
603 | goto end; |
604 | } | |
605 | ||
606 | /* Copy session name */ | |
1da0efb1 JG |
607 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
608 | sizeof(handle->session_name)); | |
609 | if (ret) { | |
610 | goto error; | |
611 | } | |
cd80958d | 612 | |
95681498 JG |
613 | /* Copy lttng domain or leave initialized to 0. */ |
614 | if (domain) { | |
615 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
616 | } | |
cd80958d DG |
617 | |
618 | end: | |
619 | return handle; | |
1da0efb1 JG |
620 | error: |
621 | free(handle); | |
622 | return NULL; | |
cd80958d DG |
623 | } |
624 | ||
625 | /* | |
626 | * Destroy handle by free(3) the pointer. | |
627 | */ | |
628 | void lttng_destroy_handle(struct lttng_handle *handle) | |
629 | { | |
0e428499 | 630 | free(handle); |
eb354453 DG |
631 | } |
632 | ||
d9800920 DG |
633 | /* |
634 | * Register an outside consumer. | |
9ae110e2 | 635 | * |
1c8d13c8 | 636 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
637 | */ |
638 | int lttng_register_consumer(struct lttng_handle *handle, | |
639 | const char *socket_path) | |
640 | { | |
1da0efb1 | 641 | int ret; |
d9800920 DG |
642 | struct lttcomm_session_msg lsm; |
643 | ||
2f70b271 | 644 | if (handle == NULL || socket_path == NULL) { |
1da0efb1 JG |
645 | ret = -LTTNG_ERR_INVALID; |
646 | goto end; | |
2f70b271 DG |
647 | } |
648 | ||
53efb85a | 649 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 650 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
1da0efb1 | 651 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 652 | sizeof(lsm.session.name)); |
1da0efb1 JG |
653 | if (ret) { |
654 | ret = -LTTNG_ERR_INVALID; | |
655 | goto end; | |
656 | } | |
657 | ||
60160d2a | 658 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 659 | |
1da0efb1 JG |
660 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
661 | sizeof(lsm.u.reg.path)); | |
662 | if (ret) { | |
663 | ret = -LTTNG_ERR_INVALID; | |
664 | goto end; | |
665 | } | |
d9800920 | 666 | |
1da0efb1 JG |
667 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
668 | end: | |
669 | return ret; | |
d9800920 DG |
670 | } |
671 | ||
1df4dedd | 672 | /* |
9ae110e2 JG |
673 | * Start tracing for all traces of the session. |
674 | * | |
675 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 676 | */ |
6a4f824d | 677 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 678 | { |
1da0efb1 | 679 | int ret; |
cd80958d DG |
680 | struct lttcomm_session_msg lsm; |
681 | ||
6a4f824d | 682 | if (session_name == NULL) { |
1da0efb1 JG |
683 | ret = -LTTNG_ERR_INVALID; |
684 | goto end; | |
cd80958d DG |
685 | } |
686 | ||
53efb85a | 687 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 688 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 689 | |
1da0efb1 JG |
690 | ret = lttng_strncpy(lsm.session.name, session_name, |
691 | sizeof(lsm.session.name)); | |
692 | if (ret) { | |
693 | ret = -LTTNG_ERR_INVALID; | |
694 | goto end; | |
695 | } | |
cd80958d | 696 | |
1da0efb1 JG |
697 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
698 | end: | |
699 | return ret; | |
f3ed775e | 700 | } |
1df4dedd DG |
701 | |
702 | /* | |
38ee087f | 703 | * Stop tracing for all traces of the session. |
f3ed775e | 704 | */ |
38ee087f | 705 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 706 | { |
38ee087f | 707 | int ret, data_ret; |
cd80958d DG |
708 | struct lttcomm_session_msg lsm; |
709 | ||
6a4f824d | 710 | if (session_name == NULL) { |
1da0efb1 JG |
711 | ret = -LTTNG_ERR_INVALID; |
712 | goto error; | |
6a4f824d DG |
713 | } |
714 | ||
53efb85a | 715 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 716 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 717 | |
1da0efb1 JG |
718 | ret = lttng_strncpy(lsm.session.name, session_name, |
719 | sizeof(lsm.session.name)); | |
720 | if (ret) { | |
721 | ret = -LTTNG_ERR_INVALID; | |
722 | goto error; | |
723 | } | |
cd80958d | 724 | |
cac3069d | 725 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
726 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
727 | goto error; | |
728 | } | |
729 | ||
730 | if (!wait) { | |
731 | goto end; | |
732 | } | |
733 | ||
38ee087f DG |
734 | /* Check for data availability */ |
735 | do { | |
6d805429 | 736 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
737 | if (data_ret < 0) { |
738 | /* Return the data available call error. */ | |
739 | ret = data_ret; | |
740 | goto error; | |
741 | } | |
742 | ||
743 | /* | |
9ae110e2 JG |
744 | * Data sleep time before retrying (in usec). Don't sleep if the |
745 | * call returned value indicates availability. | |
38ee087f | 746 | */ |
6d805429 | 747 | if (data_ret) { |
c8f61fd4 | 748 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 749 | } |
6d805429 | 750 | } while (data_ret != 0); |
38ee087f | 751 | |
38ee087f DG |
752 | end: |
753 | error: | |
754 | return ret; | |
755 | } | |
756 | ||
757 | /* | |
758 | * Stop tracing and wait for data availability. | |
759 | */ | |
760 | int lttng_stop_tracing(const char *session_name) | |
761 | { | |
762 | return _lttng_stop_tracing(session_name, 1); | |
763 | } | |
764 | ||
765 | /* | |
766 | * Stop tracing but _don't_ wait for data availability. | |
767 | */ | |
768 | int lttng_stop_tracing_no_wait(const char *session_name) | |
769 | { | |
770 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
771 | } |
772 | ||
773 | /* | |
601d5acf DG |
774 | * Add context to a channel. |
775 | * | |
776 | * If the given channel is NULL, add the contexts to all channels. | |
777 | * The event_name param is ignored. | |
af87c45a DG |
778 | * |
779 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 780 | */ |
cd80958d | 781 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
782 | struct lttng_event_context *ctx, const char *event_name, |
783 | const char *channel_name) | |
d65106b1 | 784 | { |
2001793c JG |
785 | int ret; |
786 | size_t len = 0; | |
787 | char *buf = NULL; | |
cd80958d DG |
788 | struct lttcomm_session_msg lsm; |
789 | ||
9ae110e2 | 790 | /* Safety check. Both are mandatory. */ |
9d697d3d | 791 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
792 | ret = -LTTNG_ERR_INVALID; |
793 | goto end; | |
cd80958d DG |
794 | } |
795 | ||
441c16a7 | 796 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
797 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
798 | ||
85076754 | 799 | /* If no channel name, send empty string. */ |
1da0efb1 JG |
800 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
801 | sizeof(lsm.u.context.channel_name)); | |
802 | if (ret) { | |
803 | ret = -LTTNG_ERR_INVALID; | |
804 | goto end; | |
85076754 | 805 | } |
cd80958d | 806 | |
60160d2a | 807 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
1da0efb1 | 808 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 809 | sizeof(lsm.session.name)); |
1da0efb1 JG |
810 | if (ret) { |
811 | ret = -LTTNG_ERR_INVALID; | |
812 | goto end; | |
813 | } | |
cd80958d | 814 | |
2001793c JG |
815 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
816 | size_t provider_len, ctx_len; | |
817 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
818 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
819 | ||
820 | if (!provider_name || !ctx_name) { | |
821 | ret = -LTTNG_ERR_INVALID; | |
822 | goto end; | |
823 | } | |
824 | ||
825 | provider_len = strlen(provider_name); | |
826 | if (provider_len == 0) { | |
827 | ret = -LTTNG_ERR_INVALID; | |
828 | goto end; | |
829 | } | |
830 | lsm.u.context.provider_name_len = provider_len; | |
831 | ||
832 | ctx_len = strlen(ctx_name); | |
833 | if (ctx_len == 0) { | |
834 | ret = -LTTNG_ERR_INVALID; | |
835 | goto end; | |
836 | } | |
837 | lsm.u.context.context_name_len = ctx_len; | |
838 | ||
839 | len = provider_len + ctx_len; | |
840 | buf = zmalloc(len); | |
841 | if (!buf) { | |
842 | ret = -LTTNG_ERR_NOMEM; | |
843 | goto end; | |
844 | } | |
845 | ||
846 | memcpy(buf, provider_name, provider_len); | |
847 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
848 | } | |
849 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
850 | |
851 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
852 | /* | |
853 | * Don't leak application addresses to the sessiond. | |
854 | * This is only necessary when ctx is for an app ctx otherwise | |
855 | * the values inside the union (type & config) are overwritten. | |
856 | */ | |
857 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
858 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
859 | } | |
2001793c | 860 | |
795a978d | 861 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
862 | end: |
863 | free(buf); | |
864 | return ret; | |
d65106b1 DG |
865 | } |
866 | ||
f3ed775e | 867 | /* |
9ae110e2 JG |
868 | * Enable event(s) for a channel. |
869 | * | |
870 | * If no event name is specified, all events are enabled. | |
871 | * If no channel name is specified, the default 'channel0' is used. | |
872 | * | |
873 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 874 | */ |
cd80958d | 875 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 876 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 877 | { |
f8a96544 JI |
878 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
879 | NULL, 0, NULL); | |
1df4dedd DG |
880 | } |
881 | ||
53a80697 | 882 | /* |
025faf73 | 883 | * Create or enable an event with a filter expression. |
178191b3 | 884 | * |
53a80697 MD |
885 | * Return negative error value on error. |
886 | * Return size of returned session payload data if OK. | |
887 | */ | |
025faf73 | 888 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 889 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
890 | const char *filter_expression) |
891 | { | |
f8a96544 JI |
892 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
893 | filter_expression, 0, NULL); | |
53a80697 MD |
894 | } |
895 | ||
347c5ab5 | 896 | /* |
0e115563 | 897 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
898 | * NULL if not applicable. |
899 | * | |
900 | * An event with NO loglevel and the name is * will return NULL. | |
901 | */ | |
0e115563 | 902 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
903 | { |
904 | int err; | |
0e115563 | 905 | char *agent_filter = NULL; |
347c5ab5 DG |
906 | |
907 | assert(ev); | |
908 | ||
909 | /* Don't add filter for the '*' event. */ | |
9f449915 | 910 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 911 | if (filter) { |
0e115563 | 912 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
913 | ev->name); |
914 | } else { | |
0e115563 | 915 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
916 | } |
917 | if (err < 0) { | |
918 | PERROR("asprintf"); | |
6a556f7b | 919 | goto error; |
347c5ab5 DG |
920 | } |
921 | } | |
922 | ||
923 | /* Add loglevel filtering if any for the JUL domain. */ | |
924 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
cea15630 | 925 | const char *op; |
347c5ab5 DG |
926 | |
927 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
928 | op = ">="; | |
929 | } else { | |
930 | op = "=="; | |
931 | } | |
932 | ||
0e115563 | 933 | if (filter || agent_filter) { |
6a556f7b JG |
934 | char *new_filter; |
935 | ||
fb0edb23 | 936 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 937 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 938 | ev->loglevel); |
0e115563 DG |
939 | if (agent_filter) { |
940 | free(agent_filter); | |
6a556f7b | 941 | } |
0e115563 | 942 | agent_filter = new_filter; |
347c5ab5 | 943 | } else { |
0e115563 | 944 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
945 | ev->loglevel); |
946 | } | |
947 | if (err < 0) { | |
948 | PERROR("asprintf"); | |
6a556f7b | 949 | goto error; |
347c5ab5 DG |
950 | } |
951 | } | |
952 | ||
0e115563 | 953 | return agent_filter; |
6a556f7b | 954 | error: |
0e115563 | 955 | free(agent_filter); |
6a556f7b | 956 | return NULL; |
347c5ab5 DG |
957 | } |
958 | ||
137b9942 | 959 | /* |
ec166985 | 960 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
961 | * newly allocated parser context in ctxp and populate the lsm object with the |
962 | * expression len. | |
963 | * | |
964 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
965 | */ | |
966 | static int generate_filter(char *filter_expression, | |
967 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
968 | { | |
969 | int ret; | |
970 | struct filter_parser_ctx *ctx = NULL; | |
971 | FILE *fmem = NULL; | |
972 | ||
973 | assert(filter_expression); | |
974 | assert(lsm); | |
975 | assert(ctxp); | |
976 | ||
977 | /* | |
978 | * Casting const to non-const, as the underlying function will use it in | |
979 | * read-only mode. | |
980 | */ | |
981 | fmem = lttng_fmemopen((void *) filter_expression, | |
982 | strlen(filter_expression), "r"); | |
983 | if (!fmem) { | |
984 | fprintf(stderr, "Error opening memory as stream\n"); | |
985 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
986 | goto error; | |
987 | } | |
988 | ctx = filter_parser_ctx_alloc(fmem); | |
989 | if (!ctx) { | |
990 | fprintf(stderr, "Error allocating parser\n"); | |
991 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
992 | goto filter_alloc_error; | |
993 | } | |
994 | ret = filter_parser_ctx_append_ast(ctx); | |
995 | if (ret) { | |
996 | fprintf(stderr, "Parse error\n"); | |
997 | ret = -LTTNG_ERR_FILTER_INVAL; | |
998 | goto parse_error; | |
999 | } | |
137b9942 DG |
1000 | if (print_xml) { |
1001 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
1002 | if (ret) { | |
1003 | fflush(stdout); | |
1004 | fprintf(stderr, "XML print error\n"); | |
1005 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1006 | goto parse_error; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | dbg_printf("Generating IR... "); | |
1011 | fflush(stdout); | |
1012 | ret = filter_visitor_ir_generate(ctx); | |
1013 | if (ret) { | |
1014 | fprintf(stderr, "Generate IR error\n"); | |
1015 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1016 | goto parse_error; | |
1017 | } | |
1018 | dbg_printf("done\n"); | |
1019 | ||
1020 | dbg_printf("Validating IR... "); | |
1021 | fflush(stdout); | |
1022 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
1023 | if (ret) { | |
1024 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1025 | goto parse_error; | |
1026 | } | |
9f449915 PP |
1027 | |
1028 | /* Normalize globbing patterns in the expression. */ | |
1029 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
1030 | if (ret) { | |
1031 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1032 | goto parse_error; | |
1033 | } | |
1034 | ||
9ae110e2 | 1035 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
1036 | ret = filter_visitor_ir_validate_string(ctx); |
1037 | if (ret) { | |
1038 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1039 | goto parse_error; | |
1040 | } | |
9f449915 PP |
1041 | |
1042 | /* Validate globbing patterns in the expression. */ | |
1043 | ret = filter_visitor_ir_validate_globbing(ctx); | |
1044 | if (ret) { | |
1045 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1046 | goto parse_error; | |
1047 | } | |
1048 | ||
137b9942 DG |
1049 | dbg_printf("done\n"); |
1050 | ||
1051 | dbg_printf("Generating bytecode... "); | |
1052 | fflush(stdout); | |
1053 | ret = filter_visitor_bytecode_generate(ctx); | |
1054 | if (ret) { | |
1055 | fprintf(stderr, "Generate bytecode error\n"); | |
1056 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1057 | goto parse_error; | |
1058 | } | |
1059 | dbg_printf("done\n"); | |
1060 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
1061 | bytecode_get_len(&ctx->bytecode->b)); | |
1062 | ||
1063 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1064 | + bytecode_get_len(&ctx->bytecode->b); | |
1065 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
1066 | ||
1067 | /* No need to keep the memory stream. */ | |
1068 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1069 | PERROR("fclose"); |
137b9942 DG |
1070 | } |
1071 | ||
1072 | *ctxp = ctx; | |
1073 | return 0; | |
1074 | ||
1075 | parse_error: | |
137b9942 DG |
1076 | filter_ir_free(ctx); |
1077 | filter_parser_ctx_free(ctx); | |
1078 | filter_alloc_error: | |
1079 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1080 | PERROR("fclose"); |
137b9942 DG |
1081 | } |
1082 | error: | |
1083 | return ret; | |
1084 | } | |
1085 | ||
93deb080 JI |
1086 | /* |
1087 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1088 | * If no event name is specified, all events are enabled. | |
1089 | * If no channel name is specified, the default name is used. | |
1090 | * If filter expression is not NULL, the filter is set for the event. | |
1091 | * If exclusion count is not zero, the exclusions are set for the event. | |
1092 | * Returns size of returned session payload data or a negative error code. | |
1093 | */ | |
1094 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1095 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1096 | const char *original_filter_expression, |
93deb080 JI |
1097 | int exclusion_count, char **exclusion_list) |
1098 | { | |
1099 | struct lttcomm_session_msg lsm; | |
15e37663 JG |
1100 | struct lttng_dynamic_buffer send_buffer; |
1101 | int ret = 0, i, fd_to_send = -1; | |
1102 | bool send_fd = false; | |
137b9942 | 1103 | unsigned int free_filter_expression = 0; |
93deb080 | 1104 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1105 | |
6a0838b7 YL |
1106 | /* |
1107 | * We have either a filter or some exclusions, so we need to set up | |
1108 | * a variable-length memory block from where to send the data. | |
1109 | */ | |
1110 | lttng_dynamic_buffer_init(&send_buffer); | |
ec005ec6 | 1111 | |
e9efbcd3 JG |
1112 | /* |
1113 | * Cast as non-const since we may replace the filter expression | |
1114 | * by a dynamically allocated string. Otherwise, the original | |
1115 | * string is not modified. | |
1116 | */ | |
1117 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1118 | |
1119 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1120 | ret = -LTTNG_ERR_INVALID; |
1121 | goto error; | |
93deb080 JI |
1122 | } |
1123 | ||
9ae110e2 JG |
1124 | /* |
1125 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1126 | * anyway, so treat this corner-case early to eliminate |
1127 | * lttng_fmemopen error for 0-byte allocation. | |
1128 | */ | |
1129 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1130 | ret = -LTTNG_ERR_INVALID; |
1131 | goto error; | |
93deb080 JI |
1132 | } |
1133 | ||
1134 | memset(&lsm, 0, sizeof(lsm)); | |
1135 | ||
1136 | /* If no channel name, send empty string. */ | |
1da0efb1 JG |
1137 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", |
1138 | sizeof(lsm.u.enable.channel_name)); | |
1139 | if (ret) { | |
1140 | ret = -LTTNG_ERR_INVALID; | |
1141 | goto error; | |
93deb080 JI |
1142 | } |
1143 | ||
18a720cd MD |
1144 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1145 | if (ev->name[0] == '\0') { | |
1da0efb1 JG |
1146 | /* Enable all events. */ |
1147 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
1148 | assert(ret == 0); | |
6565421f | 1149 | } |
93deb080 | 1150 | |
60160d2a | 1151 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1152 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1153 | ||
1da0efb1 | 1154 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
93deb080 | 1155 | sizeof(lsm.session.name)); |
1da0efb1 JG |
1156 | if (ret) { |
1157 | ret = -LTTNG_ERR_INVALID; | |
1158 | goto error; | |
1159 | } | |
1160 | ||
93deb080 JI |
1161 | lsm.u.enable.exclusion_count = exclusion_count; |
1162 | lsm.u.enable.bytecode_len = 0; | |
1163 | ||
9ae110e2 | 1164 | /* Parse filter expression. */ |
5cdb6027 | 1165 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1166 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1167 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1168 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1169 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1170 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1171 | char *agent_filter; | |
64226865 | 1172 | |
347c5ab5 | 1173 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1174 | agent_filter = set_agent_filter(filter_expression, ev); |
1175 | if (!agent_filter) { | |
137b9942 | 1176 | if (!filter_expression) { |
9ae110e2 JG |
1177 | /* |
1178 | * No JUL and no filter, just skip | |
1179 | * everything below. | |
1180 | */ | |
137b9942 DG |
1181 | goto ask_sessiond; |
1182 | } | |
64226865 DG |
1183 | } else { |
1184 | /* | |
9ae110e2 JG |
1185 | * With an agent filter, the original filter has |
1186 | * been added to it thus replace the filter | |
1187 | * expression. | |
64226865 | 1188 | */ |
0e115563 | 1189 | filter_expression = agent_filter; |
e9efbcd3 | 1190 | free_filter_expression = 1; |
9b21e6d5 | 1191 | } |
9b21e6d5 | 1192 | } |
93deb080 | 1193 | |
137b9942 | 1194 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1195 | if (ret) { |
137b9942 | 1196 | goto filter_error; |
93deb080 | 1197 | } |
6b453b5e JG |
1198 | } |
1199 | ||
15e37663 JG |
1200 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1201 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1202 | + lsm.u.enable.expression_len |
1203 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1204 | if (ret) { |
6b453b5e | 1205 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1206 | goto mem_error; |
6b453b5e | 1207 | } |
137b9942 | 1208 | |
9ae110e2 | 1209 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1210 | for (i = 0; i < exclusion_count; i++) { |
1211 | size_t exclusion_len; | |
1212 | ||
1213 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1214 | LTTNG_SYMBOL_NAME_LEN); | |
1215 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1216 | /* Exclusion is not NULL-terminated. */ | |
1217 | ret = -LTTNG_ERR_INVALID; | |
1218 | goto mem_error; | |
1219 | } | |
1220 | ||
1221 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1222 | *(exclusion_list + i), | |
1223 | LTTNG_SYMBOL_NAME_LEN); | |
1224 | if (ret) { | |
1225 | goto mem_error; | |
1226 | } | |
6b453b5e | 1227 | } |
15e37663 | 1228 | |
9ae110e2 | 1229 | /* Add filter expression next. */ |
15e37663 JG |
1230 | if (filter_expression) { |
1231 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1232 | filter_expression, lsm.u.enable.expression_len); | |
1233 | if (ret) { | |
1234 | goto mem_error; | |
1235 | } | |
6b453b5e | 1236 | } |
9ae110e2 | 1237 | /* Add filter bytecode next. */ |
137b9942 | 1238 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1239 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1240 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1241 | if (ret) { | |
1242 | goto mem_error; | |
1243 | } | |
1244 | } | |
1245 | if (ev->extended.ptr) { | |
1246 | struct lttng_event_extended *ev_ext = | |
1247 | (struct lttng_event_extended *) ev->extended.ptr; | |
1248 | ||
1249 | if (ev_ext->probe_location) { | |
1250 | /* | |
1251 | * lttng_userspace_probe_location_serialize returns the | |
1252 | * number of bytes that was appended to the buffer. | |
1253 | */ | |
1254 | ret = lttng_userspace_probe_location_serialize( | |
1255 | ev_ext->probe_location, &send_buffer, | |
1256 | &fd_to_send); | |
56f0bc67 | 1257 | if (ret < 0) { |
15e37663 JG |
1258 | goto mem_error; |
1259 | } | |
1260 | ||
1261 | send_fd = fd_to_send >= 0; | |
1262 | /* | |
1263 | * Set the size of the userspace probe location element | |
1264 | * of the buffer so that the receiving side knows where | |
1265 | * to split it. | |
1266 | */ | |
1267 | lsm.u.enable.userspace_probe_location_len = ret; | |
1268 | } | |
93deb080 JI |
1269 | } |
1270 | ||
15e37663 JG |
1271 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1272 | send_fd ? &fd_to_send : NULL, | |
1273 | send_fd ? 1 : 0, | |
1274 | send_buffer.size ? send_buffer.data : NULL, | |
1275 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1276 | |
7ca1dc6f DG |
1277 | mem_error: |
1278 | if (filter_expression && ctx) { | |
93deb080 JI |
1279 | filter_bytecode_free(ctx); |
1280 | filter_ir_free(ctx); | |
1281 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1282 | } |
1283 | filter_error: | |
1284 | if (free_filter_expression) { | |
1285 | /* | |
9ae110e2 JG |
1286 | * The filter expression has been replaced and must be freed as |
1287 | * it is not the original filter expression received as a | |
1288 | * parameter. | |
7ca1dc6f DG |
1289 | */ |
1290 | free(filter_expression); | |
93deb080 | 1291 | } |
137b9942 DG |
1292 | error: |
1293 | /* | |
9ae110e2 JG |
1294 | * Return directly to the caller and don't ask the sessiond since |
1295 | * something went wrong in the parsing of data above. | |
137b9942 | 1296 | */ |
15e37663 | 1297 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1298 | return ret; |
3e1c9ff7 DG |
1299 | |
1300 | ask_sessiond: | |
1301 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1302 | return ret; | |
93deb080 JI |
1303 | } |
1304 | ||
6e911cad MD |
1305 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1306 | struct lttng_event *ev, const char *channel_name, | |
1307 | const char *original_filter_expression) | |
1df4dedd | 1308 | { |
cd80958d | 1309 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1310 | char *varlen_data; |
1311 | int ret = 0; | |
1312 | unsigned int free_filter_expression = 0; | |
1313 | struct filter_parser_ctx *ctx = NULL; | |
1314 | /* | |
1315 | * Cast as non-const since we may replace the filter expression | |
1316 | * by a dynamically allocated string. Otherwise, the original | |
1317 | * string is not modified. | |
1318 | */ | |
1319 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1320 | |
6e911cad MD |
1321 | if (handle == NULL || ev == NULL) { |
1322 | ret = -LTTNG_ERR_INVALID; | |
1323 | goto error; | |
1324 | } | |
1325 | ||
9ae110e2 JG |
1326 | /* |
1327 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1328 | * anyway, so treat this corner-case early to eliminate |
1329 | * lttng_fmemopen error for 0-byte allocation. | |
1330 | */ | |
1331 | if (filter_expression && filter_expression[0] == '\0') { | |
1332 | ret = -LTTNG_ERR_INVALID; | |
1333 | goto error; | |
cd80958d DG |
1334 | } |
1335 | ||
441c16a7 MD |
1336 | memset(&lsm, 0, sizeof(lsm)); |
1337 | ||
85076754 | 1338 | /* If no channel name, send empty string. */ |
1da0efb1 JG |
1339 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", |
1340 | sizeof(lsm.u.disable.channel_name)); | |
1341 | if (ret) { | |
1342 | ret = -LTTNG_ERR_INVALID; | |
1343 | goto error; | |
eb354453 DG |
1344 | } |
1345 | ||
18a720cd | 1346 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1347 | |
60160d2a | 1348 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1349 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1350 | ||
1da0efb1 | 1351 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 1352 | sizeof(lsm.session.name)); |
1da0efb1 JG |
1353 | if (ret) { |
1354 | ret = -LTTNG_ERR_INVALID; | |
1355 | goto error; | |
1356 | } | |
1357 | ||
6e911cad | 1358 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1359 | |
6e911cad MD |
1360 | /* |
1361 | * For the JUL domain, a filter is enforced except for the | |
1362 | * disable all event. This is done to avoid having the event in | |
1363 | * all sessions thus filtering by logger name. | |
1364 | */ | |
1365 | if (filter_expression == NULL && | |
1366 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1367 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1368 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1369 | goto ask_sessiond; |
1370 | } | |
1371 | ||
1372 | /* | |
1373 | * We have a filter, so we need to set up a variable-length | |
1374 | * memory block from where to send the data. | |
1375 | */ | |
1376 | ||
1377 | /* Parse filter expression */ | |
1378 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1379 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1380 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1381 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1382 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1383 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1384 | char *agent_filter; | |
6e911cad MD |
1385 | |
1386 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1387 | agent_filter = set_agent_filter(filter_expression, ev); |
1388 | if (!agent_filter) { | |
6e911cad | 1389 | if (!filter_expression) { |
9ae110e2 JG |
1390 | /* |
1391 | * No JUL and no filter, just skip | |
1392 | * everything below. | |
1393 | */ | |
6e911cad MD |
1394 | goto ask_sessiond; |
1395 | } | |
1396 | } else { | |
1397 | /* | |
9ae110e2 JG |
1398 | * With a JUL filter, the original filter has |
1399 | * been added to it thus replace the filter | |
1400 | * expression. | |
6e911cad | 1401 | */ |
0e115563 | 1402 | filter_expression = agent_filter; |
6e911cad MD |
1403 | free_filter_expression = 1; |
1404 | } | |
1405 | } | |
1406 | ||
1407 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1408 | if (ret) { | |
1409 | goto filter_error; | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1414 | + lsm.u.disable.expression_len); | |
1415 | if (!varlen_data) { | |
1416 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1417 | goto mem_error; | |
1418 | } | |
1419 | ||
9ae110e2 | 1420 | /* Add filter expression. */ |
6e911cad MD |
1421 | if (lsm.u.disable.expression_len != 0) { |
1422 | memcpy(varlen_data, | |
1423 | filter_expression, | |
1424 | lsm.u.disable.expression_len); | |
1425 | } | |
9ae110e2 | 1426 | /* Add filter bytecode next. */ |
6e911cad MD |
1427 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1428 | memcpy(varlen_data | |
1429 | + lsm.u.disable.expression_len, | |
1430 | &ctx->bytecode->b, | |
1431 | lsm.u.disable.bytecode_len); | |
1432 | } | |
1433 | ||
795a978d | 1434 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1435 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1436 | free(varlen_data); | |
1437 | ||
1438 | mem_error: | |
1439 | if (filter_expression && ctx) { | |
1440 | filter_bytecode_free(ctx); | |
1441 | filter_ir_free(ctx); | |
1442 | filter_parser_ctx_free(ctx); | |
1443 | } | |
1444 | filter_error: | |
1445 | if (free_filter_expression) { | |
1446 | /* | |
9ae110e2 JG |
1447 | * The filter expression has been replaced and must be freed as |
1448 | * it is not the original filter expression received as a | |
1449 | * parameter. | |
6e911cad MD |
1450 | */ |
1451 | free(filter_expression); | |
1452 | } | |
1453 | error: | |
1454 | /* | |
9ae110e2 JG |
1455 | * Return directly to the caller and don't ask the sessiond since |
1456 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1457 | */ |
1458 | return ret; | |
1459 | ||
1460 | ask_sessiond: | |
1461 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1462 | return ret; | |
1463 | } | |
1464 | ||
1465 | /* | |
9ae110e2 JG |
1466 | * Disable event(s) of a channel and domain. |
1467 | * If no event name is specified, all events are disabled. | |
1468 | * If no channel name is specified, the default 'channel0' is used. | |
1469 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1470 | */ |
1471 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1472 | const char *channel_name) | |
1473 | { | |
1da0efb1 | 1474 | int ret; |
6e911cad MD |
1475 | struct lttng_event ev; |
1476 | ||
1477 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1478 | ev.loglevel = -1; |
6e911cad | 1479 | ev.type = LTTNG_EVENT_ALL; |
1da0efb1 JG |
1480 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1481 | if (ret) { | |
1482 | ret = -LTTNG_ERR_INVALID; | |
1483 | goto end; | |
1484 | } | |
1485 | ||
1486 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1487 | end: | |
1488 | return ret; | |
1df4dedd DG |
1489 | } |
1490 | ||
cf0bcb51 JG |
1491 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1492 | { | |
1493 | struct lttng_channel *channel = NULL; | |
1494 | struct lttng_channel_extended *extended = NULL; | |
1495 | ||
1496 | if (!domain) { | |
1497 | goto error; | |
1498 | } | |
1499 | ||
1500 | /* Validate domain. */ | |
1501 | switch (domain->type) { | |
1502 | case LTTNG_DOMAIN_UST: | |
1503 | switch (domain->buf_type) { | |
1504 | case LTTNG_BUFFER_PER_UID: | |
1505 | case LTTNG_BUFFER_PER_PID: | |
1506 | break; | |
1507 | default: | |
1508 | goto error; | |
1509 | } | |
1510 | break; | |
1511 | case LTTNG_DOMAIN_KERNEL: | |
1512 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1513 | goto error; | |
1514 | } | |
1515 | break; | |
1516 | default: | |
1517 | goto error; | |
1518 | } | |
1519 | ||
1520 | channel = zmalloc(sizeof(*channel)); | |
1521 | if (!channel) { | |
1522 | goto error; | |
1523 | } | |
1524 | ||
1525 | extended = zmalloc(sizeof(*extended)); | |
1526 | if (!extended) { | |
1527 | goto error; | |
1528 | } | |
1529 | ||
1530 | channel->attr.extended.ptr = extended; | |
1531 | ||
1532 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1533 | return channel; | |
1534 | error: | |
1535 | free(channel); | |
1536 | free(extended); | |
1537 | return NULL; | |
1538 | } | |
1539 | ||
1540 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1541 | { | |
1542 | if (!channel) { | |
1543 | return; | |
1544 | } | |
1545 | ||
1546 | if (channel->attr.extended.ptr) { | |
1547 | free(channel->attr.extended.ptr); | |
1548 | } | |
1549 | free(channel); | |
1550 | } | |
1551 | ||
1df4dedd | 1552 | /* |
9ae110e2 JG |
1553 | * Enable channel per domain |
1554 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1555 | */ |
cd80958d | 1556 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1557 | struct lttng_channel *in_chan) |
a5c5a2bd | 1558 | { |
1da0efb1 | 1559 | int ret; |
cd80958d | 1560 | struct lttcomm_session_msg lsm; |
09b72f7a | 1561 | size_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1562 | |
9ae110e2 | 1563 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1564 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1565 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1566 | } |
1567 | ||
441c16a7 | 1568 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1569 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1570 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1571 | |
cf0bcb51 JG |
1572 | if (!in_chan->attr.extended.ptr) { |
1573 | struct lttng_channel *channel; | |
1574 | struct lttng_channel_extended *extended; | |
7d29a247 | 1575 | |
cf0bcb51 JG |
1576 | channel = lttng_channel_create(&handle->domain); |
1577 | if (!channel) { | |
1578 | return -LTTNG_ERR_NOMEM; | |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * Create a new channel in order to use default extended | |
1583 | * attribute values. | |
1584 | */ | |
1585 | extended = (struct lttng_channel_extended *) | |
1586 | channel->attr.extended.ptr; | |
1587 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1588 | lttng_channel_destroy(channel); | |
1589 | } else { | |
1590 | struct lttng_channel_extended *extended; | |
1591 | ||
1592 | extended = (struct lttng_channel_extended *) | |
1593 | in_chan->attr.extended.ptr; | |
1594 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1595 | } | |
cd80958d | 1596 | |
09b72f7a FD |
1597 | /* |
1598 | * Verify that the amount of memory required to create the requested | |
1599 | * buffer is available on the system at the moment. | |
1600 | */ | |
1601 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * | |
1602 | lsm.u.channel.chan.attr.subbuf_size; | |
1603 | if (!check_enough_available_memory(total_buffer_size_needed_per_cpu)) { | |
1604 | return -LTTNG_ERR_NOMEM; | |
1605 | } | |
1606 | ||
cf0bcb51 | 1607 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1608 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1609 | |
1da0efb1 JG |
1610 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1611 | sizeof(lsm.session.name)); | |
1612 | if (ret) { | |
1613 | ret = -LTTNG_ERR_INVALID; | |
1614 | goto end; | |
1615 | } | |
cd80958d | 1616 | |
1da0efb1 JG |
1617 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1618 | end: | |
1619 | return ret; | |
8c0faa1d | 1620 | } |
1df4dedd | 1621 | |
2ef84c95 | 1622 | /* |
9ae110e2 JG |
1623 | * All tracing will be stopped for registered events of the channel. |
1624 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1625 | */ |
cd80958d | 1626 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1627 | { |
1da0efb1 | 1628 | int ret; |
cd80958d DG |
1629 | struct lttcomm_session_msg lsm; |
1630 | ||
9ae110e2 | 1631 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1632 | if (handle == NULL || name == NULL) { |
2f70b271 | 1633 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1634 | } |
1635 | ||
441c16a7 MD |
1636 | memset(&lsm, 0, sizeof(lsm)); |
1637 | ||
cd80958d | 1638 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1639 | |
1da0efb1 | 1640 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1641 | sizeof(lsm.u.disable.channel_name)); |
1da0efb1 JG |
1642 | if (ret) { |
1643 | ret = -LTTNG_ERR_INVALID; | |
1644 | goto end; | |
1645 | } | |
9d697d3d | 1646 | |
60160d2a | 1647 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1648 | |
1da0efb1 JG |
1649 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1650 | sizeof(lsm.session.name)); | |
1651 | if (ret) { | |
1652 | ret = -LTTNG_ERR_INVALID; | |
1653 | goto end; | |
1654 | } | |
cd80958d | 1655 | |
1da0efb1 JG |
1656 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1657 | end: | |
1658 | return ret; | |
ca95a216 DG |
1659 | } |
1660 | ||
fac6795d | 1661 | /* |
9ae110e2 JG |
1662 | * Lists all available tracepoints of domain. |
1663 | * Sets the contents of the events array. | |
1664 | * Returns the number of lttng_event entries in events; | |
1665 | * on error, returns a negative value. | |
fac6795d | 1666 | */ |
cd80958d | 1667 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1668 | struct lttng_event **events) |
fac6795d | 1669 | { |
052da939 | 1670 | int ret; |
cd80958d DG |
1671 | struct lttcomm_session_msg lsm; |
1672 | ||
9d697d3d | 1673 | if (handle == NULL) { |
2f70b271 | 1674 | return -LTTNG_ERR_INVALID; |
cd80958d | 1675 | } |
fac6795d | 1676 | |
53efb85a | 1677 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1678 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1679 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1680 | |
cac3069d | 1681 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1682 | if (ret < 0) { |
1683 | return ret; | |
eb354453 | 1684 | } |
fac6795d | 1685 | |
9f19cc17 | 1686 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1687 | } |
1688 | ||
f37d259d | 1689 | /* |
9ae110e2 JG |
1690 | * Lists all available tracepoint fields of domain. |
1691 | * Sets the contents of the event field array. | |
1692 | * Returns the number of lttng_event_field entries in events; | |
1693 | * on error, returns a negative value. | |
f37d259d MD |
1694 | */ |
1695 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1696 | struct lttng_event_field **fields) | |
1697 | { | |
1698 | int ret; | |
1699 | struct lttcomm_session_msg lsm; | |
1700 | ||
1701 | if (handle == NULL) { | |
2f70b271 | 1702 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1703 | } |
1704 | ||
53efb85a | 1705 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1706 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1707 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1708 | |
cac3069d | 1709 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1710 | if (ret < 0) { |
1711 | return ret; | |
1712 | } | |
1713 | ||
1714 | return ret / sizeof(struct lttng_event_field); | |
1715 | } | |
1716 | ||
834978fd | 1717 | /* |
9ae110e2 JG |
1718 | * Lists all available kernel system calls. Allocates and sets the contents of |
1719 | * the events array. | |
834978fd | 1720 | * |
9ae110e2 JG |
1721 | * Returns the number of lttng_event entries in events; on error, returns a |
1722 | * negative value. | |
834978fd DG |
1723 | */ |
1724 | int lttng_list_syscalls(struct lttng_event **events) | |
1725 | { | |
1726 | int ret; | |
1727 | struct lttcomm_session_msg lsm; | |
1728 | ||
1729 | if (!events) { | |
1730 | return -LTTNG_ERR_INVALID; | |
1731 | } | |
1732 | ||
1733 | memset(&lsm, 0, sizeof(lsm)); | |
1734 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1735 | /* Force kernel domain for system calls. */ | |
1736 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1737 | ||
1738 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1739 | if (ret < 0) { | |
1740 | return ret; | |
1741 | } | |
1742 | ||
1743 | return ret / sizeof(struct lttng_event); | |
1744 | } | |
1745 | ||
1657e9bb | 1746 | /* |
9ae110e2 JG |
1747 | * Returns a human readable string describing |
1748 | * the error code (a negative value). | |
1657e9bb | 1749 | */ |
9a745bc7 | 1750 | const char *lttng_strerror(int code) |
1657e9bb | 1751 | { |
f73fabfd | 1752 | return error_get_str(code); |
1657e9bb DG |
1753 | } |
1754 | ||
b178f53e JG |
1755 | enum lttng_error_code lttng_create_session_ext( |
1756 | struct lttng_session_descriptor *session_descriptor) | |
1757 | { | |
1758 | enum lttng_error_code ret_code; | |
1759 | struct lttcomm_session_msg lsm = { | |
1760 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1761 | }; | |
1762 | void *reply = NULL; | |
1763 | struct lttng_buffer_view reply_view; | |
1764 | int reply_ret; | |
1765 | bool sessiond_must_generate_ouput; | |
1766 | struct lttng_dynamic_buffer payload; | |
1767 | int ret; | |
1768 | size_t descriptor_size; | |
1769 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1770 | ||
1771 | lttng_dynamic_buffer_init(&payload); | |
1772 | if (!session_descriptor) { | |
1773 | ret_code = LTTNG_ERR_INVALID; | |
1774 | goto end; | |
1775 | } | |
1776 | ||
1777 | sessiond_must_generate_ouput = | |
1778 | !lttng_session_descriptor_is_output_destination_initialized( | |
1779 | session_descriptor); | |
1780 | if (sessiond_must_generate_ouput) { | |
1781 | const char *home_dir = utils_get_home_dir(); | |
1782 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1783 | ||
1784 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1785 | ret_code = LTTNG_ERR_FATAL; | |
1786 | goto end; | |
1787 | } | |
1788 | ||
1789 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1790 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1791 | home_dir_len); | |
1792 | if (ret) { | |
1793 | ret_code = LTTNG_ERR_NOMEM; | |
1794 | goto end; | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | descriptor_size = payload.size; | |
1799 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1800 | &payload); | |
1801 | if (ret) { | |
1802 | ret_code = LTTNG_ERR_INVALID; | |
1803 | goto end; | |
1804 | } | |
1805 | descriptor_size = payload.size - descriptor_size; | |
1806 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1807 | ||
1808 | /* Command returns a session descriptor on success. */ | |
1809 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1810 | payload.size, &reply); | |
1811 | if (reply_ret < 0) { | |
1812 | ret_code = -reply_ret; | |
1813 | goto end; | |
1814 | } else if (reply_ret == 0) { | |
1815 | /* Socket unexpectedly closed by the session daemon. */ | |
1816 | ret_code = LTTNG_ERR_FATAL; | |
1817 | goto end; | |
1818 | } | |
1819 | ||
1820 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1821 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1822 | &descriptor_reply); | |
1823 | if (ret < 0) { | |
1824 | ret_code = LTTNG_ERR_FATAL; | |
1825 | goto end; | |
1826 | } | |
1827 | ret_code = LTTNG_OK; | |
1828 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1829 | end: | |
1830 | free(reply); | |
1831 | lttng_dynamic_buffer_reset(&payload); | |
1832 | lttng_session_descriptor_destroy(descriptor_reply); | |
1833 | return ret_code; | |
1834 | } | |
1835 | ||
aaf97519 | 1836 | /* |
b178f53e | 1837 | * Create a new session using name and url for destination. |
a4b92340 | 1838 | * |
780d4bb8 | 1839 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1840 | */ |
a4b92340 | 1841 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1842 | { |
3dd05a85 | 1843 | int ret; |
a4b92340 | 1844 | ssize_t size; |
a4b92340 | 1845 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1846 | struct lttng_session_descriptor *descriptor = NULL; |
1847 | enum lttng_error_code ret_code; | |
00e2e675 | 1848 | |
b178f53e JG |
1849 | if (!name) { |
1850 | ret = -LTTNG_ERR_INVALID; | |
1851 | goto end; | |
00e2e675 DG |
1852 | } |
1853 | ||
bc894455 | 1854 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1855 | if (size < 0) { |
b178f53e JG |
1856 | ret = -LTTNG_ERR_INVALID; |
1857 | goto end; | |
1858 | } | |
1859 | switch (size) { | |
1860 | case 0: | |
1861 | descriptor = lttng_session_descriptor_create(name); | |
1862 | break; | |
1863 | case 1: | |
1864 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1865 | ret = -LTTNG_ERR_INVALID; | |
1866 | goto end; | |
1867 | } | |
1868 | descriptor = lttng_session_descriptor_local_create(name, | |
1869 | uris[0].dst.path); | |
1870 | break; | |
1871 | case 2: | |
1872 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1873 | NULL); | |
1874 | break; | |
1875 | default: | |
1876 | ret = -LTTNG_ERR_INVALID; | |
1877 | goto end; | |
1878 | } | |
1879 | if (!descriptor) { | |
1880 | ret = -LTTNG_ERR_INVALID; | |
1881 | goto end; | |
00e2e675 | 1882 | } |
b178f53e JG |
1883 | ret_code = lttng_create_session_ext(descriptor); |
1884 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1885 | end: | |
1886 | lttng_session_descriptor_destroy(descriptor); | |
1887 | free(uris); | |
1888 | return ret; | |
1889 | } | |
00e2e675 | 1890 | |
b178f53e JG |
1891 | /* |
1892 | * Create a session exclusively used for snapshot. | |
1893 | * | |
780d4bb8 | 1894 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1895 | */ |
1896 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1897 | { | |
1898 | int ret; | |
1899 | enum lttng_error_code ret_code; | |
1900 | ssize_t size; | |
1901 | struct lttng_uri *uris = NULL; | |
1902 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1903 | |
b178f53e JG |
1904 | if (!name) { |
1905 | ret = -LTTNG_ERR_INVALID; | |
1906 | goto end; | |
1907 | } | |
1908 | ||
1909 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1910 | if (size < 0) { | |
1911 | ret = -LTTNG_ERR_INVALID; | |
1912 | goto end; | |
1913 | } | |
1914 | /* | |
1915 | * If the user does not specify a custom subdir, use the session name. | |
1916 | */ | |
1917 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1918 | strlen(uris[0].subdir) == 0) { | |
1919 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1920 | name); | |
1921 | if (ret < 0) { | |
1922 | PERROR("Failed to set session name as network destination sub-directory"); | |
1923 | ret = -LTTNG_ERR_FATAL; | |
1924 | goto end; | |
1925 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1926 | /* Truncated output. */ | |
1927 | ret = -LTTNG_ERR_INVALID; | |
1928 | goto end; | |
1929 | } | |
1930 | } | |
3dd05a85 | 1931 | |
b178f53e JG |
1932 | switch (size) { |
1933 | case 0: | |
1934 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1935 | break; | |
1936 | case 1: | |
1937 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1938 | ret = -LTTNG_ERR_INVALID; | |
1939 | goto end; | |
1940 | } | |
1941 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1942 | name, | |
1943 | uris[0].dst.path); | |
1944 | break; | |
1945 | case 2: | |
1946 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1947 | name, | |
1948 | snapshot_url, | |
1949 | NULL); | |
1950 | break; | |
1951 | default: | |
1952 | ret = -LTTNG_ERR_INVALID; | |
1953 | goto end; | |
1954 | } | |
1955 | if (!descriptor) { | |
1956 | ret = -LTTNG_ERR_INVALID; | |
1957 | goto end; | |
1958 | } | |
1959 | ret_code = lttng_create_session_ext(descriptor); | |
1960 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1961 | end: | |
1962 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1963 | free(uris); |
1964 | return ret; | |
00e2e675 DG |
1965 | } |
1966 | ||
b178f53e JG |
1967 | /* |
1968 | * Create a session exclusively used for live. | |
1969 | * | |
780d4bb8 | 1970 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1971 | */ |
1972 | int lttng_create_session_live(const char *name, const char *url, | |
1973 | unsigned int timer_interval) | |
1974 | { | |
1975 | int ret; | |
1976 | enum lttng_error_code ret_code; | |
1977 | struct lttng_session_descriptor *descriptor = NULL; | |
1978 | ||
1979 | if (!name) { | |
1980 | ret = -LTTNG_ERR_INVALID; | |
1981 | goto end; | |
1982 | } | |
1983 | ||
1984 | if (url) { | |
1985 | descriptor = lttng_session_descriptor_live_network_create( | |
1986 | name, url, NULL, timer_interval); | |
1987 | } else { | |
1988 | descriptor = lttng_session_descriptor_live_create( | |
1989 | name, timer_interval); | |
1990 | } | |
1991 | if (!descriptor) { | |
1992 | ret = -LTTNG_ERR_INVALID; | |
1993 | goto end; | |
1994 | } | |
1995 | ret_code = lttng_create_session_ext(descriptor); | |
1996 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1997 | end: | |
1998 | lttng_session_descriptor_destroy(descriptor); | |
1999 | return ret; | |
2000 | } | |
2001 | ||
e20ee7c2 JD |
2002 | /* |
2003 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2004 | * |
2005 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2006 | */ |
2007 | int lttng_destroy_session(const char *session_name) | |
2008 | { | |
2009 | int ret; | |
3e3665b8 JG |
2010 | enum lttng_error_code ret_code; |
2011 | enum lttng_destruction_handle_status status; | |
2012 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2013 | |
2014 | /* | |
3e3665b8 JG |
2015 | * Stop the tracing and wait for the data to be |
2016 | * consumed. | |
e20ee7c2 JD |
2017 | */ |
2018 | ret = _lttng_stop_tracing(session_name, 1); | |
2019 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2020 | goto end; | |
2021 | } | |
2022 | ||
3e3665b8 JG |
2023 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2024 | if (ret_code != LTTNG_OK) { | |
2025 | ret = (int) -ret_code; | |
2026 | goto end; | |
2027 | } | |
2028 | assert(handle); | |
2029 | ||
2030 | /* Block until the completion of the destruction of the session. */ | |
2031 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2032 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2033 | ret = -LTTNG_ERR_UNK; | |
2034 | goto end; | |
2035 | } | |
2036 | ||
2037 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2038 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2039 | ret = -LTTNG_ERR_UNK; | |
2040 | goto end; | |
2041 | } | |
780d4bb8 | 2042 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2043 | end: |
3e3665b8 | 2044 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2045 | return ret; |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * Destroy the session without waiting for the data. | |
2050 | */ | |
2051 | int lttng_destroy_session_no_wait(const char *session_name) | |
2052 | { | |
3e3665b8 | 2053 | enum lttng_error_code ret_code; |
e20ee7c2 | 2054 | |
3e3665b8 | 2055 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
548ce42c | 2056 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2057 | } |
2058 | ||
57167058 | 2059 | /* |
9ae110e2 JG |
2060 | * Ask the session daemon for all available sessions. |
2061 | * Sets the contents of the sessions array. | |
2062 | * Returns the number of lttng_session entries in sessions; | |
2063 | * on error, returns a negative value. | |
57167058 | 2064 | */ |
b178f53e | 2065 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2066 | { |
ca95a216 | 2067 | int ret; |
cd80958d | 2068 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2069 | const size_t session_size = sizeof(struct lttng_session) + |
2070 | sizeof(struct lttng_session_extended); | |
2071 | size_t session_count, i; | |
2072 | struct lttng_session_extended *sessions_extended_begin; | |
2073 | struct lttng_session *sessions = NULL; | |
57167058 | 2074 | |
53efb85a | 2075 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2076 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
b178f53e JG |
2077 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2078 | if (ret <= 0) { | |
b178f53e JG |
2079 | goto end; |
2080 | } | |
2081 | if (!sessions) { | |
2082 | ret = -LTTNG_ERR_FATAL; | |
2083 | goto end; | |
2084 | } | |
2085 | ||
2086 | if (ret % session_size) { | |
2087 | ret = -LTTNG_ERR_UNK; | |
2088 | free(sessions); | |
2089 | *out_sessions = NULL; | |
2090 | goto end; | |
57167058 | 2091 | } |
b178f53e JG |
2092 | session_count = (size_t) ret / session_size; |
2093 | sessions_extended_begin = (struct lttng_session_extended *) | |
2094 | (&sessions[session_count]); | |
57167058 | 2095 | |
b178f53e JG |
2096 | /* Set extended session info pointers. */ |
2097 | for (i = 0; i < session_count; i++) { | |
2098 | struct lttng_session *session = &sessions[i]; | |
2099 | struct lttng_session_extended *extended = | |
2100 | &(sessions_extended_begin[i]); | |
2101 | ||
2102 | session->extended.ptr = extended; | |
2103 | } | |
2104 | ||
2105 | ret = (int) session_count; | |
2106 | *out_sessions = sessions; | |
2107 | end: | |
2108 | return ret; | |
2109 | } | |
2110 | ||
2111 | enum lttng_error_code lttng_session_get_creation_time( | |
2112 | const struct lttng_session *session, uint64_t *creation_time) | |
2113 | { | |
2114 | enum lttng_error_code ret = LTTNG_OK; | |
2115 | struct lttng_session_extended *extended; | |
2116 | ||
2117 | if (!session || !creation_time || !session->extended.ptr) { | |
2118 | ret = LTTNG_ERR_INVALID; | |
2119 | goto end; | |
2120 | } | |
2121 | ||
2122 | extended = session->extended.ptr; | |
2123 | if (!extended->creation_time.is_set) { | |
2124 | /* Not created on the session daemon yet. */ | |
2125 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2126 | goto end; | |
2127 | } | |
2128 | *creation_time = extended->creation_time.value; | |
2129 | end: | |
2130 | return ret; | |
57167058 DG |
2131 | } |
2132 | ||
d7ba1388 MD |
2133 | int lttng_set_session_shm_path(const char *session_name, |
2134 | const char *shm_path) | |
2135 | { | |
1da0efb1 | 2136 | int ret; |
d7ba1388 MD |
2137 | struct lttcomm_session_msg lsm; |
2138 | ||
2139 | if (session_name == NULL) { | |
2140 | return -LTTNG_ERR_INVALID; | |
2141 | } | |
2142 | ||
2143 | memset(&lsm, 0, sizeof(lsm)); | |
2144 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2145 | ||
1da0efb1 | 2146 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2147 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2148 | if (ret) { |
2149 | ret = -LTTNG_ERR_INVALID; | |
2150 | goto end; | |
2151 | } | |
2152 | ||
2153 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2154 | sizeof(lsm.u.set_shm_path.shm_path)); |
1da0efb1 JG |
2155 | if (ret) { |
2156 | ret = -LTTNG_ERR_INVALID; | |
2157 | goto end; | |
2158 | } | |
d7ba1388 | 2159 | |
1da0efb1 JG |
2160 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2161 | end: | |
2162 | return ret; | |
d7ba1388 MD |
2163 | } |
2164 | ||
9f19cc17 | 2165 | /* |
9ae110e2 JG |
2166 | * Ask the session daemon for all available domains of a session. |
2167 | * Sets the contents of the domains array. | |
2168 | * Returns the number of lttng_domain entries in domains; | |
2169 | * on error, returns a negative value. | |
9f19cc17 | 2170 | */ |
330be774 | 2171 | int lttng_list_domains(const char *session_name, |
cd80958d | 2172 | struct lttng_domain **domains) |
9f19cc17 DG |
2173 | { |
2174 | int ret; | |
cd80958d DG |
2175 | struct lttcomm_session_msg lsm; |
2176 | ||
330be774 | 2177 | if (session_name == NULL) { |
1da0efb1 JG |
2178 | ret = -LTTNG_ERR_INVALID; |
2179 | goto error; | |
cd80958d | 2180 | } |
9f19cc17 | 2181 | |
53efb85a | 2182 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2183 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2184 | ||
1da0efb1 | 2185 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2186 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2187 | if (ret) { |
2188 | ret = -LTTNG_ERR_INVALID; | |
2189 | goto error; | |
2190 | } | |
cd80958d | 2191 | |
cac3069d | 2192 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2193 | if (ret < 0) { |
1da0efb1 | 2194 | goto error; |
9f19cc17 DG |
2195 | } |
2196 | ||
2197 | return ret / sizeof(struct lttng_domain); | |
1da0efb1 JG |
2198 | error: |
2199 | return ret; | |
9f19cc17 DG |
2200 | } |
2201 | ||
2202 | /* | |
9ae110e2 JG |
2203 | * Ask the session daemon for all available channels of a session. |
2204 | * Sets the contents of the channels array. | |
2205 | * Returns the number of lttng_channel entries in channels; | |
2206 | * on error, returns a negative value. | |
9f19cc17 | 2207 | */ |
cd80958d DG |
2208 | int lttng_list_channels(struct lttng_handle *handle, |
2209 | struct lttng_channel **channels) | |
9f19cc17 DG |
2210 | { |
2211 | int ret; | |
53e367f9 JG |
2212 | size_t channel_count, i; |
2213 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2214 | sizeof(struct lttng_channel_extended); |
cd80958d | 2215 | struct lttcomm_session_msg lsm; |
53e367f9 | 2216 | void *extended_at; |
cd80958d | 2217 | |
9d697d3d | 2218 | if (handle == NULL) { |
53e367f9 JG |
2219 | ret = -LTTNG_ERR_INVALID; |
2220 | goto end; | |
cd80958d DG |
2221 | } |
2222 | ||
53efb85a | 2223 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2224 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
1da0efb1 | 2225 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2226 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2227 | if (ret) { |
2228 | ret = -LTTNG_ERR_INVALID; | |
2229 | goto end; | |
2230 | } | |
9f19cc17 | 2231 | |
60160d2a | 2232 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2233 | |
cac3069d | 2234 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2235 | if (ret < 0) { |
53e367f9 JG |
2236 | goto end; |
2237 | } | |
2238 | ||
2239 | if (ret % channel_size) { | |
2240 | ret = -LTTNG_ERR_UNK; | |
2241 | free(*channels); | |
2242 | *channels = NULL; | |
2243 | goto end; | |
9f19cc17 | 2244 | } |
53e367f9 | 2245 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2246 | |
53e367f9 JG |
2247 | /* Set extended info pointers */ |
2248 | extended_at = ((void *) *channels) + | |
2249 | channel_count * sizeof(struct lttng_channel); | |
2250 | for (i = 0; i < channel_count; i++) { | |
2251 | struct lttng_channel *chan = &(*channels)[i]; | |
2252 | ||
2253 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2254 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2255 | } |
2256 | ||
2257 | ret = (int) channel_count; | |
2258 | end: | |
2259 | return ret; | |
9f19cc17 DG |
2260 | } |
2261 | ||
2262 | /* | |
9ae110e2 JG |
2263 | * Ask the session daemon for all available events of a session channel. |
2264 | * Sets the contents of the events array. | |
2265 | * Returns the number of lttng_event entries in events; | |
2266 | * on error, returns a negative value. | |
9f19cc17 | 2267 | */ |
cd80958d DG |
2268 | int lttng_list_events(struct lttng_handle *handle, |
2269 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2270 | { |
2271 | int ret; | |
cd80958d | 2272 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
2273 | struct lttcomm_event_command_header *cmd_header = NULL; |
2274 | size_t cmd_header_len; | |
2275 | uint32_t nb_events, i; | |
de453daa | 2276 | void *comm_ext_at; |
de453daa | 2277 | char *reception_buffer = NULL; |
56f0bc67 | 2278 | struct lttng_dynamic_buffer listing; |
de453daa | 2279 | size_t storage_req; |
9f19cc17 | 2280 | |
9d697d3d DG |
2281 | /* Safety check. An handle and channel name are mandatory */ |
2282 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 2283 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
2284 | } |
2285 | ||
53efb85a | 2286 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2287 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
1da0efb1 | 2288 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2289 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2290 | if (ret) { |
2291 | ret = -LTTNG_ERR_INVALID; | |
2292 | goto end; | |
2293 | } | |
2294 | ||
2295 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2296 | sizeof(lsm.u.list.channel_name)); |
1da0efb1 JG |
2297 | if (ret) { |
2298 | ret = -LTTNG_ERR_INVALID; | |
2299 | goto end; | |
2300 | } | |
2301 | ||
60160d2a | 2302 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2303 | |
a04d53fc | 2304 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
2305 | (void **) &reception_buffer, (void **) &cmd_header, |
2306 | &cmd_header_len); | |
9f19cc17 | 2307 | if (ret < 0) { |
de453daa | 2308 | goto end; |
9f19cc17 DG |
2309 | } |
2310 | ||
d9f484bc JG |
2311 | if (!cmd_header) { |
2312 | ret = -LTTNG_ERR_UNK; | |
2313 | goto end; | |
2314 | } | |
2315 | ||
b4e3ceb9 PP |
2316 | /* Set number of events and free command header */ |
2317 | nb_events = cmd_header->nb_events; | |
2318 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2319 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2320 | goto end; |
b4e3ceb9 | 2321 | } |
b4e3ceb9 PP |
2322 | free(cmd_header); |
2323 | cmd_header = NULL; | |
2324 | ||
de453daa JG |
2325 | /* |
2326 | * The buffer that is returned must contain a "flat" version of | |
2327 | * the events that are returned. In other words, all pointers | |
2328 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2329 | * buffer so that the user may free everything by simply calling free() |
2330 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2331 | * compatibility. |
2332 | * | |
56f0bc67 JG |
2333 | * A first pass is performed to compute the size of the buffer that |
2334 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2335 | * the returned events so that their members always point within the |
2336 | * buffer. | |
2337 | * | |
2338 | * The layout of the returned buffer is as follows: | |
2339 | * - struct lttng_event[nb_events], | |
2340 | * - nb_events times the following: | |
2341 | * - struct lttng_event_extended, | |
2342 | * - flattened version of userspace_probe_location | |
2343 | * - filter_expression | |
2344 | * - exclusions | |
2345 | * - padding to align to 64-bits | |
2346 | */ | |
2347 | comm_ext_at = reception_buffer + | |
2348 | (nb_events * sizeof(struct lttng_event)); | |
2349 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
2350 | |
2351 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
2352 | struct lttcomm_event_extended_header *ext_comm = |
2353 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 2354 | int probe_storage_req = 0; |
b4e3ceb9 | 2355 | |
de453daa JG |
2356 | comm_ext_at += sizeof(*ext_comm); |
2357 | comm_ext_at += ext_comm->filter_len; | |
2358 | comm_ext_at += | |
2359 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2360 | ||
56f0bc67 JG |
2361 | if (ext_comm->userspace_probe_location_len) { |
2362 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2363 | struct lttng_buffer_view probe_location_view; | |
2364 | ||
2365 | probe_location_view = lttng_buffer_view_init( | |
2366 | comm_ext_at, 0, | |
2367 | ext_comm->userspace_probe_location_len); | |
2368 | ||
2369 | /* | |
2370 | * Create a temporary userspace probe location to | |
2371 | * determine the size needed by a "flattened" version | |
2372 | * of that same probe location. | |
2373 | */ | |
2374 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2375 | &probe_location_view, &probe_location); | |
2376 | if (ret < 0) { | |
2377 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2378 | goto end; | |
2379 | } | |
2380 | ||
2381 | ret = lttng_userspace_probe_location_flatten( | |
2382 | probe_location, NULL); | |
2383 | lttng_userspace_probe_location_destroy(probe_location); | |
2384 | if (ret < 0) { | |
2385 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2386 | goto end; | |
2387 | } | |
2388 | ||
2389 | probe_storage_req = ret; | |
2390 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2391 | } |
2392 | ||
de453daa | 2393 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2394 | storage_req += ext_comm->filter_len; |
2395 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2396 | /* Padding to ensure the flat probe is aligned. */ |
2397 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2398 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2399 | } |
2400 | ||
56f0bc67 JG |
2401 | lttng_dynamic_buffer_init(&listing); |
2402 | /* | |
2403 | * We must ensure that "listing" is never resized so as to preserve | |
2404 | * the validity of the flattened objects. | |
2405 | */ | |
2406 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2407 | if (ret) { | |
2408 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2409 | goto end; |
2410 | } | |
56f0bc67 JG |
2411 | |
2412 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2413 | nb_events * sizeof(struct lttng_event)); | |
2414 | if (ret) { | |
2415 | ret = -LTTNG_ERR_NOMEM; | |
2416 | goto free_dynamic_buffer; | |
2417 | } | |
de453daa JG |
2418 | |
2419 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2420 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2421 | for (i = 0; i < nb_events; i++) { |
2422 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2423 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2424 | struct lttcomm_event_extended_header *ext_comm = |
2425 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2426 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2427 | (struct lttng_event_extended *) |
2428 | (listing.data + listing.size); | |
de453daa | 2429 | |
56f0bc67 JG |
2430 | /* Insert struct lttng_event_extended. */ |
2431 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2432 | listing.size + sizeof(*event_extended)); | |
2433 | if (ret) { | |
2434 | ret = -LTTNG_ERR_NOMEM; | |
2435 | goto free_dynamic_buffer; | |
2436 | } | |
de453daa | 2437 | event->extended.ptr = event_extended; |
56f0bc67 | 2438 | |
de453daa JG |
2439 | comm_ext_at += sizeof(*ext_comm); |
2440 | ||
56f0bc67 JG |
2441 | /* Insert filter expression. */ |
2442 | if (ext_comm->filter_len) { | |
2443 | event_extended->filter_expression = listing.data + | |
2444 | listing.size; | |
2445 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2446 | ext_comm->filter_len); | |
2447 | if (ret) { | |
2448 | ret = -LTTNG_ERR_NOMEM; | |
2449 | goto free_dynamic_buffer; | |
2450 | } | |
2451 | comm_ext_at += ext_comm->filter_len; | |
2452 | } | |
2453 | ||
2454 | /* Insert exclusions. */ | |
2455 | if (ext_comm->nb_exclusions) { | |
2456 | event_extended->exclusions.count = | |
2457 | ext_comm->nb_exclusions; | |
2458 | event_extended->exclusions.strings = | |
2459 | listing.data + listing.size; | |
2460 | ||
2461 | ret = lttng_dynamic_buffer_append(&listing, | |
2462 | comm_ext_at, | |
2463 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2464 | if (ret) { | |
2465 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2466 | goto free_dynamic_buffer; |
56f0bc67 JG |
2467 | } |
2468 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2469 | } | |
2470 | ||
2471 | /* Insert padding to align to 64-bits. */ | |
2472 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2473 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2474 | if (ret) { | |
2475 | ret = -LTTNG_ERR_NOMEM; | |
2476 | goto free_dynamic_buffer; | |
2477 | } | |
2478 | ||
2479 | /* Insert flattened userspace probe location. */ | |
2480 | if (ext_comm->userspace_probe_location_len) { | |
2481 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2482 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2483 | |
56f0bc67 JG |
2484 | probe_location_view = lttng_buffer_view_init( |
2485 | comm_ext_at, 0, | |
2486 | ext_comm->userspace_probe_location_len); | |
de453daa | 2487 | |
56f0bc67 JG |
2488 | ret = lttng_userspace_probe_location_create_from_buffer( |
2489 | &probe_location_view, &probe_location); | |
2490 | if (ret < 0) { | |
2491 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2492 | goto free_dynamic_buffer; | |
2493 | } | |
2494 | ||
2495 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2496 | (listing.data + listing.size); | |
2497 | ret = lttng_userspace_probe_location_flatten( | |
2498 | probe_location, &listing); | |
2499 | lttng_userspace_probe_location_destroy(probe_location); | |
2500 | if (ret < 0) { | |
2501 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2502 | goto free_dynamic_buffer; | |
2503 | } | |
2504 | ||
2505 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2506 | } | |
de453daa JG |
2507 | } |
2508 | ||
56f0bc67 JG |
2509 | /* Don't reset listing buffer as we return its content. */ |
2510 | *events = (struct lttng_event *) listing.data; | |
2511 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2512 | ret = (int) nb_events; |
56f0bc67 JG |
2513 | free_dynamic_buffer: |
2514 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2515 | end: |
b4e3ceb9 | 2516 | free(cmd_header); |
de453daa | 2517 | free(reception_buffer); |
b4e3ceb9 | 2518 | return ret; |
9f19cc17 DG |
2519 | } |
2520 | ||
fac6795d | 2521 | /* |
1c8d13c8 TD |
2522 | * Sets the tracing_group variable with name. |
2523 | * This function allocates memory pointed to by tracing_group. | |
2524 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2525 | */ |
2526 | int lttng_set_tracing_group(const char *name) | |
2527 | { | |
9d697d3d | 2528 | if (name == NULL) { |
2f70b271 | 2529 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2530 | } |
2531 | ||
fac6795d | 2532 | if (asprintf(&tracing_group, "%s", name) < 0) { |
2f70b271 | 2533 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2534 | } |
2535 | ||
2536 | return 0; | |
2537 | } | |
2538 | ||
cd80958d | 2539 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2540 | struct lttng_calibrate *calibrate) |
2541 | { | |
b812e5ca PP |
2542 | /* |
2543 | * This command was removed in LTTng 2.9. | |
2544 | */ | |
2545 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2546 | } |
2547 | ||
5edd7e09 DG |
2548 | /* |
2549 | * Set default channel attributes. | |
441c16a7 | 2550 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2551 | */ |
2552 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2553 | struct lttng_channel_attr *attr) | |
2554 | { | |
294851b0 | 2555 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2556 | |
5edd7e09 DG |
2557 | /* Safety check */ |
2558 | if (attr == NULL || domain == NULL) { | |
2559 | return; | |
2560 | } | |
2561 | ||
294851b0 | 2562 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2563 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2564 | ||
0a9c6494 DG |
2565 | /* Same for all domains. */ |
2566 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2567 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2568 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2569 | ||
5edd7e09 DG |
2570 | switch (domain->type) { |
2571 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2572 | attr->switch_timer_interval = |
2573 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2574 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2575 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2576 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2577 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2578 | if (extended) { |
2579 | extended->monitor_timer_interval = | |
2580 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2581 | extended->blocking_timeout = |
2582 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2583 | } |
5edd7e09 DG |
2584 | break; |
2585 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2586 | switch (domain->buf_type) { |
2587 | case LTTNG_BUFFER_PER_UID: | |
2588 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2589 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2590 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2591 | attr->switch_timer_interval = |
2592 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2593 | attr->read_timer_interval = | |
2594 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2595 | if (extended) { |
2596 | extended->monitor_timer_interval = | |
2597 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2598 | extended->blocking_timeout = |
2599 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2600 | } |
0a9c6494 DG |
2601 | break; |
2602 | case LTTNG_BUFFER_PER_PID: | |
2603 | default: | |
2604 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2605 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2606 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2607 | attr->switch_timer_interval = |
2608 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2609 | attr->read_timer_interval = | |
2610 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2611 | if (extended) { |
2612 | extended->monitor_timer_interval = | |
2613 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2614 | extended->blocking_timeout = |
2615 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2616 | } |
0a9c6494 DG |
2617 | break; |
2618 | } | |
5edd7e09 | 2619 | default: |
441c16a7 | 2620 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2621 | break; |
2622 | } | |
cf0bcb51 JG |
2623 | |
2624 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2625 | } |
2626 | ||
5ba3702f JG |
2627 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2628 | uint64_t *discarded_events) | |
2629 | { | |
2630 | int ret = 0; | |
cf0bcb51 | 2631 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2632 | |
2633 | if (!channel || !discarded_events) { | |
2634 | ret = -LTTNG_ERR_INVALID; | |
2635 | goto end; | |
2636 | } | |
2637 | ||
2638 | chan_ext = channel->attr.extended.ptr; | |
2639 | if (!chan_ext) { | |
2640 | /* | |
2641 | * This can happen since the lttng_channel structure is | |
2642 | * used for other tasks where this pointer is never set. | |
2643 | */ | |
2644 | *discarded_events = 0; | |
2645 | goto end; | |
2646 | } | |
2647 | ||
2648 | *discarded_events = chan_ext->discarded_events; | |
2649 | end: | |
2650 | return ret; | |
2651 | } | |
2652 | ||
2653 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2654 | uint64_t *lost_packets) | |
2655 | { | |
2656 | int ret = 0; | |
cf0bcb51 | 2657 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2658 | |
2659 | if (!channel || !lost_packets) { | |
2660 | ret = -LTTNG_ERR_INVALID; | |
2661 | goto end; | |
2662 | } | |
2663 | ||
2664 | chan_ext = channel->attr.extended.ptr; | |
2665 | if (!chan_ext) { | |
2666 | /* | |
2667 | * This can happen since the lttng_channel structure is | |
2668 | * used for other tasks where this pointer is never set. | |
2669 | */ | |
2670 | *lost_packets = 0; | |
2671 | goto end; | |
2672 | } | |
2673 | ||
2674 | *lost_packets = chan_ext->lost_packets; | |
2675 | end: | |
2676 | return ret; | |
2677 | } | |
2678 | ||
cf0bcb51 JG |
2679 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2680 | uint64_t *monitor_timer_interval) | |
2681 | { | |
2682 | int ret = 0; | |
2683 | ||
2684 | if (!chan || !monitor_timer_interval) { | |
2685 | ret = -LTTNG_ERR_INVALID; | |
2686 | goto end; | |
2687 | } | |
2688 | ||
2689 | if (!chan->attr.extended.ptr) { | |
2690 | ret = -LTTNG_ERR_INVALID; | |
2691 | goto end; | |
2692 | } | |
2693 | ||
2694 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2695 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2696 | end: | |
2697 | return ret; | |
2698 | } | |
2699 | ||
2700 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2701 | uint64_t monitor_timer_interval) | |
2702 | { | |
2703 | int ret = 0; | |
2704 | ||
2705 | if (!chan || !chan->attr.extended.ptr) { | |
2706 | ret = -LTTNG_ERR_INVALID; | |
2707 | goto end; | |
2708 | } | |
2709 | ||
2710 | ((struct lttng_channel_extended *) | |
2711 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2712 | monitor_timer_interval; | |
2713 | end: | |
2714 | return ret; | |
2715 | } | |
2716 | ||
491d1539 MD |
2717 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2718 | int64_t *blocking_timeout) | |
2719 | { | |
2720 | int ret = 0; | |
2721 | ||
2722 | if (!chan || !blocking_timeout) { | |
2723 | ret = -LTTNG_ERR_INVALID; | |
2724 | goto end; | |
2725 | } | |
2726 | ||
2727 | if (!chan->attr.extended.ptr) { | |
2728 | ret = -LTTNG_ERR_INVALID; | |
2729 | goto end; | |
2730 | } | |
2731 | ||
2732 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2733 | chan->attr.extended.ptr)->blocking_timeout; | |
2734 | end: | |
2735 | return ret; | |
2736 | } | |
2737 | ||
2738 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2739 | int64_t blocking_timeout) | |
2740 | { | |
2741 | int ret = 0; | |
2742 | int64_t msec_timeout; | |
2743 | ||
2744 | if (!chan || !chan->attr.extended.ptr) { | |
2745 | ret = -LTTNG_ERR_INVALID; | |
2746 | goto end; | |
2747 | } | |
2748 | ||
2749 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2750 | ret = -LTTNG_ERR_INVALID; | |
2751 | goto end; | |
2752 | } | |
2753 | ||
2754 | /* | |
2755 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2756 | * us to accept a narrower range of values (msecs expressed as a signed | |
2757 | * 32-bit integer). | |
2758 | */ | |
2759 | msec_timeout = blocking_timeout / 1000; | |
2760 | if (msec_timeout != (int32_t) msec_timeout) { | |
2761 | ret = -LTTNG_ERR_INVALID; | |
2762 | goto end; | |
2763 | } | |
2764 | ||
2765 | ((struct lttng_channel_extended *) | |
2766 | chan->attr.extended.ptr)->blocking_timeout = | |
2767 | blocking_timeout; | |
2768 | end: | |
2769 | return ret; | |
2770 | } | |
2771 | ||
fac6795d | 2772 | /* |
2269e89e | 2773 | * Check if session daemon is alive. |
fac6795d | 2774 | * |
2269e89e | 2775 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2776 | * On error returns a negative value. |
fac6795d | 2777 | */ |
947308c4 | 2778 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2779 | { |
2780 | int ret; | |
2781 | ||
2782 | ret = set_session_daemon_path(); | |
2783 | if (ret < 0) { | |
9ae110e2 | 2784 | /* Error. */ |
fac6795d DG |
2785 | return ret; |
2786 | } | |
2787 | ||
9d035200 | 2788 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2789 | /* |
9ae110e2 JG |
2790 | * No socket path set. Weird error which means the constructor |
2791 | * was not called. | |
2f70b271 DG |
2792 | */ |
2793 | assert(0); | |
fac6795d DG |
2794 | } |
2795 | ||
2269e89e | 2796 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2797 | if (ret < 0) { |
9ae110e2 | 2798 | /* Not alive. */ |
7d8234d9 MD |
2799 | return 0; |
2800 | } | |
7d8234d9 | 2801 | |
9ae110e2 | 2802 | /* Is alive. */ |
947308c4 | 2803 | return 1; |
fac6795d DG |
2804 | } |
2805 | ||
00e2e675 | 2806 | /* |
a4b92340 | 2807 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2808 | * |
2809 | * Return 0 on success, else a negative value. | |
2810 | */ | |
a4b92340 DG |
2811 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2812 | const char *control_url, const char *data_url) | |
00e2e675 | 2813 | { |
3dd05a85 | 2814 | int ret; |
a4b92340 | 2815 | ssize_t size; |
00e2e675 | 2816 | struct lttcomm_session_msg lsm; |
a4b92340 | 2817 | struct lttng_uri *uris = NULL; |
00e2e675 | 2818 | |
a4b92340 | 2819 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
1da0efb1 JG |
2820 | ret = -LTTNG_ERR_INVALID; |
2821 | goto error; | |
00e2e675 DG |
2822 | } |
2823 | ||
a4b92340 DG |
2824 | memset(&lsm, 0, sizeof(lsm)); |
2825 | ||
00e2e675 DG |
2826 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2827 | ||
1da0efb1 | 2828 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 2829 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2830 | if (ret) { |
2831 | ret = -LTTNG_ERR_INVALID; | |
2832 | goto error; | |
2833 | } | |
2834 | ||
60160d2a | 2835 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2836 | |
bc894455 | 2837 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2838 | if (size < 0) { |
1da0efb1 JG |
2839 | ret = -LTTNG_ERR_INVALID; |
2840 | goto error; | |
a4b92340 DG |
2841 | } |
2842 | ||
2843 | lsm.u.uri.size = size; | |
00e2e675 | 2844 | |
795a978d | 2845 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2846 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2847 | |
2848 | free(uris); | |
1da0efb1 | 2849 | error: |
3dd05a85 | 2850 | return ret; |
00e2e675 DG |
2851 | } |
2852 | ||
2853 | /* | |
9c6bda17 | 2854 | * [OBSOLETE] |
00e2e675 | 2855 | */ |
2ec40111 | 2856 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2857 | int lttng_enable_consumer(struct lttng_handle *handle) |
2858 | { | |
785d2d0d | 2859 | return -ENOSYS; |
00e2e675 DG |
2860 | } |
2861 | ||
2862 | /* | |
9c6bda17 | 2863 | * [OBSOLETE] |
00e2e675 | 2864 | */ |
2ec40111 | 2865 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2866 | int lttng_disable_consumer(struct lttng_handle *handle) |
2867 | { | |
785d2d0d | 2868 | return -ENOSYS; |
00e2e675 DG |
2869 | } |
2870 | ||
07424f16 | 2871 | /* |
b178f53e | 2872 | * [OBSOLETE] |
07424f16 | 2873 | */ |
2ec40111 SM |
2874 | int _lttng_create_session_ext(const char *name, const char *url, |
2875 | const char *datetime); | |
07424f16 DG |
2876 | int _lttng_create_session_ext(const char *name, const char *url, |
2877 | const char *datetime) | |
2878 | { | |
b178f53e | 2879 | return -ENOSYS; |
07424f16 DG |
2880 | } |
2881 | ||
806e2684 DG |
2882 | /* |
2883 | * For a given session name, this call checks if the data is ready to be read | |
2884 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2885 | * any readers. | |
2886 | */ | |
6d805429 | 2887 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2888 | { |
2889 | int ret; | |
2890 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2891 | uint8_t *pending = NULL; |
806e2684 DG |
2892 | |
2893 | if (session_name == NULL) { | |
2894 | return -LTTNG_ERR_INVALID; | |
2895 | } | |
2896 | ||
53efb85a | 2897 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2898 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2899 | |
1da0efb1 | 2900 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2901 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2902 | if (ret) { |
2903 | ret = -LTTNG_ERR_INVALID; | |
2904 | goto end; | |
2905 | } | |
806e2684 | 2906 | |
f6151c55 JG |
2907 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2908 | if (ret < 0) { | |
2909 | goto end; | |
2910 | } else if (ret != 1) { | |
2911 | /* Unexpected payload size */ | |
2912 | ret = -LTTNG_ERR_INVALID; | |
2913 | goto end; | |
e848d36d JG |
2914 | } else if (!pending) { |
2915 | /* Internal error. */ | |
2916 | ret = -LTTNG_ERR_UNK; | |
2917 | goto end; | |
806e2684 DG |
2918 | } |
2919 | ||
f6151c55 JG |
2920 | ret = (int) *pending; |
2921 | end: | |
2922 | free(pending); | |
806e2684 DG |
2923 | return ret; |
2924 | } | |
2925 | ||
93ec662e JD |
2926 | /* |
2927 | * Regenerate the metadata for a session. | |
2928 | * Return 0 on success, a negative error code on error. | |
2929 | */ | |
eded6438 | 2930 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2931 | { |
2932 | int ret; | |
2933 | struct lttcomm_session_msg lsm; | |
2934 | ||
2935 | if (!session_name) { | |
2936 | ret = -LTTNG_ERR_INVALID; | |
2937 | goto end; | |
2938 | } | |
2939 | ||
2940 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2941 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 2942 | |
1da0efb1 | 2943 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 2944 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2945 | if (ret) { |
2946 | ret = -LTTNG_ERR_INVALID; | |
2947 | goto end; | |
2948 | } | |
93ec662e JD |
2949 | |
2950 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2951 | if (ret < 0) { | |
2952 | goto end; | |
2953 | } | |
2954 | ||
2955 | ret = 0; | |
2956 | end: | |
2957 | return ret; | |
2958 | } | |
2959 | ||
eded6438 JD |
2960 | /* |
2961 | * Deprecated, replaced by lttng_regenerate_metadata. | |
2962 | */ | |
2963 | int lttng_metadata_regenerate(const char *session_name) | |
2964 | { | |
2965 | return lttng_regenerate_metadata(session_name); | |
2966 | } | |
2967 | ||
c2561365 JD |
2968 | /* |
2969 | * Regenerate the statedump of a session. | |
2970 | * Return 0 on success, a negative error code on error. | |
2971 | */ | |
2972 | int lttng_regenerate_statedump(const char *session_name) | |
2973 | { | |
2974 | int ret; | |
2975 | struct lttcomm_session_msg lsm; | |
2976 | ||
2977 | if (!session_name) { | |
2978 | ret = -LTTNG_ERR_INVALID; | |
2979 | goto end; | |
2980 | } | |
2981 | ||
2982 | memset(&lsm, 0, sizeof(lsm)); | |
2983 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
2984 | ||
1da0efb1 | 2985 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 2986 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2987 | if (ret) { |
2988 | ret = -LTTNG_ERR_INVALID; | |
2989 | goto end; | |
2990 | } | |
c2561365 JD |
2991 | |
2992 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2993 | if (ret < 0) { | |
2994 | goto end; | |
2995 | } | |
2996 | ||
2997 | ret = 0; | |
2998 | end: | |
2999 | return ret; | |
3000 | } | |
3001 | ||
a58c490f JG |
3002 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3003 | { | |
3004 | int ret; | |
3005 | struct lttcomm_session_msg lsm; | |
3647288f | 3006 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3007 | |
3647288f | 3008 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3009 | if (!trigger) { |
3010 | ret = -LTTNG_ERR_INVALID; | |
3011 | goto end; | |
3012 | } | |
3013 | ||
3014 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 3015 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3016 | goto end; |
3017 | } | |
3018 | ||
3647288f JG |
3019 | ret = lttng_trigger_serialize(trigger, &buffer); |
3020 | if (ret < 0) { | |
a58c490f JG |
3021 | ret = -LTTNG_ERR_UNK; |
3022 | goto end; | |
3023 | } | |
3024 | ||
a58c490f JG |
3025 | memset(&lsm, 0, sizeof(lsm)); |
3026 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
3027 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3028 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3029 | buffer.size, NULL); | |
a58c490f | 3030 | end: |
3647288f | 3031 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3032 | return ret; |
3033 | } | |
3034 | ||
3035 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
3036 | { | |
3037 | int ret; | |
3038 | struct lttcomm_session_msg lsm; | |
3647288f | 3039 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3040 | |
3647288f | 3041 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3042 | if (!trigger) { |
3043 | ret = -LTTNG_ERR_INVALID; | |
3044 | goto end; | |
3045 | } | |
3046 | ||
3047 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 3048 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3049 | goto end; |
3050 | } | |
3051 | ||
3647288f JG |
3052 | ret = lttng_trigger_serialize(trigger, &buffer); |
3053 | if (ret < 0) { | |
a58c490f JG |
3054 | ret = -LTTNG_ERR_UNK; |
3055 | goto end; | |
3056 | } | |
3057 | ||
a58c490f JG |
3058 | memset(&lsm, 0, sizeof(lsm)); |
3059 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
3060 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3061 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3062 | buffer.size, NULL); | |
a58c490f | 3063 | end: |
3647288f | 3064 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3065 | return ret; |
3066 | } | |
3067 | ||
fac6795d | 3068 | /* |
9ae110e2 | 3069 | * lib constructor. |
fac6795d | 3070 | */ |
b2b89e8a | 3071 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3072 | { |
3073 | /* Set default session group */ | |
bbccc3d2 | 3074 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3075 | } |
49cca668 DG |
3076 | |
3077 | /* | |
9ae110e2 | 3078 | * lib destructor. |
49cca668 | 3079 | */ |
b2b89e8a | 3080 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3081 | { |
3082 | free(tracing_group); | |
3083 | } |