Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
eb5c4f4e | 2 | * lttng-ctl.c |
82a3637f DG |
3 | * |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
a4eb26f0 | 6 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa | 7 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 8 | * |
ab5be9fa | 9 | * SPDX-License-Identifier: LGPL-2.1-only |
82a3637f | 10 | * |
fac6795d DG |
11 | */ |
12 | ||
6c1c0768 | 13 | #define _LGPL_SOURCE |
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> | |
f9f927bc | 19 | #include <stdint.h> |
fac6795d DG |
20 | #include <string.h> |
21 | #include <unistd.h> | |
22 | ||
990570ed | 23 | #include <common/common.h> |
15e37663 | 24 | #include <common/compat/string.h> |
990570ed | 25 | #include <common/defaults.h> |
f953b297 | 26 | #include <common/dynamic-buffer.h> |
db758600 | 27 | #include <common/sessiond-comm/sessiond-comm.h> |
f953b297 | 28 | #include <common/tracker.h> |
a4b92340 | 29 | #include <common/uri.h> |
feb0f3e5 | 30 | #include <common/utils.h> |
a58c490f | 31 | #include <lttng/channel-internal.h> |
f953b297 JG |
32 | #include <lttng/destruction-handle.h> |
33 | #include <lttng/endpoint.h> | |
de453daa | 34 | #include <lttng/event-internal.h> |
f953b297 JG |
35 | #include <lttng/health-internal.h> |
36 | #include <lttng/lttng.h> | |
b178f53e | 37 | #include <lttng/session-descriptor-internal.h> |
f953b297 JG |
38 | #include <lttng/session-internal.h> |
39 | #include <lttng/trigger/trigger-internal.h> | |
40 | #include <lttng/userspace-probe-internal.h> | |
fac6795d | 41 | |
d00c599e DG |
42 | #include "filter/filter-ast.h" |
43 | #include "filter/filter-parser.h" | |
44 | #include "filter/filter-bytecode.h" | |
45 | #include "filter/memstream.h" | |
cac3069d | 46 | #include "lttng-ctl-helper.h" |
53a80697 MD |
47 | |
48 | #ifdef DEBUG | |
d00c599e | 49 | static const int print_xml = 1; |
53a80697 MD |
50 | #define dbg_printf(fmt, args...) \ |
51 | printf("[debug liblttng-ctl] " fmt, ## args) | |
52 | #else | |
d00c599e | 53 | static const int print_xml = 0; |
53a80697 MD |
54 | #define dbg_printf(fmt, args...) \ |
55 | do { \ | |
56 | /* do nothing but check printf format */ \ | |
57 | if (0) \ | |
58 | printf("[debug liblttnctl] " fmt, ## args); \ | |
59 | } while (0) | |
60 | #endif | |
61 | ||
60160d2a JG |
62 | #define COPY_DOMAIN_PACKED(dst, src) \ |
63 | do { \ | |
64 | struct lttng_domain _tmp_domain; \ | |
65 | \ | |
66 | lttng_ctl_copy_lttng_domain(&_tmp_domain, &src); \ | |
67 | dst = _tmp_domain; \ | |
68 | } while (0) | |
53a80697 | 69 | |
fac6795d | 70 | /* Socket to session daemon for communication */ |
3e3665b8 | 71 | static int sessiond_socket = -1; |
fac6795d DG |
72 | static char sessiond_sock_path[PATH_MAX]; |
73 | ||
fac6795d DG |
74 | /* Variables */ |
75 | static char *tracing_group; | |
76 | static int connected; | |
77 | ||
97e19046 DG |
78 | /* Global */ |
79 | ||
80 | /* | |
81 | * Those two variables are used by error.h to silent or control the verbosity of | |
82 | * error message. They are global to the library so application linking with it | |
83 | * are able to compile correctly and also control verbosity of the library. | |
97e19046 DG |
84 | */ |
85 | int lttng_opt_quiet; | |
86 | int lttng_opt_verbose; | |
c7e35b03 | 87 | int lttng_opt_mi; |
97e19046 | 88 | |
fac6795d | 89 | /* |
cd80958d | 90 | * Copy domain to lttcomm_session_msg domain. |
fac6795d | 91 | * |
cd80958d DG |
92 | * If domain is unknown, default domain will be the kernel. |
93 | */ | |
cac3069d DG |
94 | LTTNG_HIDDEN |
95 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
96 | struct lttng_domain *src) | |
cd80958d DG |
97 | { |
98 | if (src && dst) { | |
99 | switch (src->type) { | |
00e2e675 DG |
100 | case LTTNG_DOMAIN_KERNEL: |
101 | case LTTNG_DOMAIN_UST: | |
b9dfb167 | 102 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 103 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 104 | case LTTNG_DOMAIN_PYTHON: |
00e2e675 DG |
105 | memcpy(dst, src, sizeof(struct lttng_domain)); |
106 | break; | |
107 | default: | |
108 | memset(dst, 0, sizeof(struct lttng_domain)); | |
00e2e675 | 109 | break; |
cd80958d DG |
110 | } |
111 | } | |
112 | } | |
113 | ||
114 | /* | |
115 | * Send lttcomm_session_msg to the session daemon. | |
fac6795d | 116 | * |
1c8d13c8 TD |
117 | * On success, returns the number of bytes sent (>=0) |
118 | * On error, returns -1 | |
fac6795d | 119 | */ |
cd80958d | 120 | static int send_session_msg(struct lttcomm_session_msg *lsm) |
fac6795d DG |
121 | { |
122 | int ret; | |
123 | ||
124 | if (!connected) { | |
2f70b271 | 125 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 126 | goto end; |
fac6795d DG |
127 | } |
128 | ||
a4b92340 DG |
129 | DBG("LSM cmd type : %d", lsm->cmd_type); |
130 | ||
be040666 | 131 | ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, |
cd80958d | 132 | sizeof(struct lttcomm_session_msg)); |
2f70b271 DG |
133 | if (ret < 0) { |
134 | ret = -LTTNG_ERR_FATAL; | |
135 | } | |
e065084a DG |
136 | |
137 | end: | |
138 | return ret; | |
139 | } | |
140 | ||
53a80697 MD |
141 | /* |
142 | * Send var len data to the session daemon. | |
143 | * | |
144 | * On success, returns the number of bytes sent (>=0) | |
145 | * On error, returns -1 | |
146 | */ | |
c2d69327 | 147 | static int send_session_varlen(const void *data, size_t len) |
53a80697 MD |
148 | { |
149 | int ret; | |
150 | ||
151 | if (!connected) { | |
2f70b271 | 152 | ret = -LTTNG_ERR_NO_SESSIOND; |
53a80697 MD |
153 | goto end; |
154 | } | |
a4b92340 | 155 | |
53a80697 MD |
156 | if (!data || !len) { |
157 | ret = 0; | |
158 | goto end; | |
159 | } | |
160 | ||
161 | ret = lttcomm_send_unix_sock(sessiond_socket, data, len); | |
2f70b271 DG |
162 | if (ret < 0) { |
163 | ret = -LTTNG_ERR_FATAL; | |
164 | } | |
53a80697 MD |
165 | |
166 | end: | |
167 | return ret; | |
168 | } | |
169 | ||
a04d53fc FD |
170 | /* |
171 | * Send file descriptors to the session daemon. | |
172 | * | |
173 | * On success, returns the number of bytes sent (>=0) | |
174 | * On error, returns -1 | |
175 | */ | |
176 | static int send_session_fds(const int *fds, size_t nb_fd) | |
177 | { | |
178 | int ret; | |
179 | ||
180 | if (!connected) { | |
181 | ret = -LTTNG_ERR_NO_SESSIOND; | |
182 | goto end; | |
183 | } | |
184 | ||
185 | if (!fds || !nb_fd) { | |
186 | ret = 0; | |
187 | goto end; | |
188 | } | |
189 | ||
190 | ret = lttcomm_send_fds_unix_sock(sessiond_socket, fds, nb_fd); | |
191 | if (ret < 0) { | |
192 | ret = -LTTNG_ERR_FATAL; | |
193 | } | |
194 | ||
195 | end: | |
196 | return ret; | |
197 | } | |
198 | ||
e065084a | 199 | /* |
cd80958d | 200 | * Receive data from the sessiond socket. |
e065084a | 201 | * |
1c8d13c8 TD |
202 | * On success, returns the number of bytes received (>=0) |
203 | * On error, returns -1 (recvmsg() error) or -ENOTCONN | |
e065084a | 204 | */ |
ca95a216 | 205 | static int recv_data_sessiond(void *buf, size_t len) |
e065084a DG |
206 | { |
207 | int ret; | |
208 | ||
209 | if (!connected) { | |
2f70b271 | 210 | ret = -LTTNG_ERR_NO_SESSIOND; |
e065084a | 211 | goto end; |
fac6795d DG |
212 | } |
213 | ||
ca95a216 | 214 | ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len); |
2f70b271 DG |
215 | if (ret < 0) { |
216 | ret = -LTTNG_ERR_FATAL; | |
217 | } | |
fac6795d | 218 | |
e065084a | 219 | end: |
fac6795d DG |
220 | return ret; |
221 | } | |
222 | ||
223 | /* | |
9ae110e2 | 224 | * Check if we are in the specified group. |
65beb5ff | 225 | * |
9ae110e2 | 226 | * If yes return 1, else return -1. |
947308c4 | 227 | */ |
6c71277b MD |
228 | LTTNG_HIDDEN |
229 | int lttng_check_tracing_group(void) | |
947308c4 | 230 | { |
28ab59d0 | 231 | gid_t *grp_list, tracing_gid; |
947308c4 DG |
232 | int grp_list_size, grp_id, i; |
233 | int ret = -1; | |
6c71277b | 234 | const char *grp_name = tracing_group; |
947308c4 DG |
235 | |
236 | /* Get GID of group 'tracing' */ | |
28ab59d0 | 237 | if (utils_get_group_id(grp_name, false, &tracing_gid)) { |
b4d8603b | 238 | /* If grp_tracing is NULL, the group does not exist. */ |
947308c4 DG |
239 | goto end; |
240 | } | |
241 | ||
242 | /* Get number of supplementary group IDs */ | |
243 | grp_list_size = getgroups(0, NULL); | |
244 | if (grp_list_size < 0) { | |
6f04ed72 | 245 | PERROR("getgroups"); |
947308c4 DG |
246 | goto end; |
247 | } | |
248 | ||
249 | /* Alloc group list of the right size */ | |
3f451dc0 | 250 | grp_list = zmalloc(grp_list_size * sizeof(gid_t)); |
00795392 | 251 | if (!grp_list) { |
6f04ed72 | 252 | PERROR("malloc"); |
00795392 MD |
253 | goto end; |
254 | } | |
947308c4 | 255 | grp_id = getgroups(grp_list_size, grp_list); |
1c8d13c8 | 256 | if (grp_id < 0) { |
6f04ed72 | 257 | PERROR("getgroups"); |
947308c4 DG |
258 | goto free_list; |
259 | } | |
260 | ||
261 | for (i = 0; i < grp_list_size; i++) { | |
28ab59d0 | 262 | if (grp_list[i] == tracing_gid) { |
2269e89e | 263 | ret = 1; |
947308c4 DG |
264 | break; |
265 | } | |
266 | } | |
267 | ||
268 | free_list: | |
269 | free(grp_list); | |
270 | ||
271 | end: | |
272 | return ret; | |
273 | } | |
274 | ||
f9f927bc JR |
275 | static enum lttng_error_code check_enough_available_memory( |
276 | uint64_t num_bytes_requested_per_cpu) | |
09b72f7a FD |
277 | { |
278 | int ret; | |
279 | long num_cpu; | |
f9f927bc JR |
280 | uint64_t best_mem_info; |
281 | uint64_t num_bytes_requested_total; | |
09b72f7a FD |
282 | |
283 | /* | |
284 | * Get the number of CPU currently online to compute the amount of | |
285 | * memory needed to create a buffer for every CPU. | |
286 | */ | |
287 | num_cpu = sysconf(_SC_NPROCESSORS_ONLN); | |
288 | if (num_cpu == -1) { | |
f9f927bc JR |
289 | ret = LTTNG_ERR_FATAL; |
290 | goto end; | |
291 | } | |
292 | ||
293 | if (num_bytes_requested_per_cpu > UINT64_MAX / (uint64_t) num_cpu) { | |
294 | /* Overflow */ | |
295 | ret = LTTNG_ERR_OVERFLOW; | |
296 | goto end; | |
09b72f7a FD |
297 | } |
298 | ||
f9f927bc JR |
299 | num_bytes_requested_total = |
300 | num_bytes_requested_per_cpu * (uint64_t) num_cpu; | |
09b72f7a FD |
301 | |
302 | /* | |
303 | * Try to get the `MemAvail` field of `/proc/meminfo`. This is the most | |
304 | * reliable estimate we can get but it is only exposed by the kernel | |
305 | * since 3.14. (See Linux kernel commit: | |
306 | * 34e431b0ae398fc54ea69ff85ec700722c9da773) | |
307 | */ | |
308 | ret = utils_get_memory_available(&best_mem_info); | |
309 | if (ret >= 0) { | |
310 | goto success; | |
311 | } | |
312 | ||
313 | /* | |
314 | * As a backup plan, use `MemTotal` field of `/proc/meminfo`. This | |
315 | * is a sanity check for obvious user error. | |
316 | */ | |
317 | ret = utils_get_memory_total(&best_mem_info); | |
318 | if (ret >= 0) { | |
319 | goto success; | |
320 | } | |
321 | ||
f9f927bc JR |
322 | /* No valid source of information. */ |
323 | ret = LTTNG_ERR_NOMEM; | |
324 | goto end; | |
325 | ||
09b72f7a | 326 | success: |
f9f927bc JR |
327 | if (best_mem_info >= num_bytes_requested_total) { |
328 | ret = LTTNG_OK; | |
329 | } else { | |
330 | ret = LTTNG_ERR_NOMEM; | |
331 | } | |
332 | end: | |
333 | return ret; | |
09b72f7a FD |
334 | } |
335 | ||
947308c4 | 336 | /* |
2269e89e DG |
337 | * Try connect to session daemon with sock_path. |
338 | * | |
339 | * Return 0 on success, else -1 | |
340 | */ | |
341 | static int try_connect_sessiond(const char *sock_path) | |
342 | { | |
343 | int ret; | |
344 | ||
345 | /* If socket exist, we check if the daemon listens for connect. */ | |
346 | ret = access(sock_path, F_OK); | |
347 | if (ret < 0) { | |
348 | /* Not alive */ | |
2f70b271 | 349 | goto error; |
2269e89e DG |
350 | } |
351 | ||
352 | ret = lttcomm_connect_unix_sock(sock_path); | |
353 | if (ret < 0) { | |
9ae110e2 | 354 | /* Not alive. */ |
2f70b271 | 355 | goto error; |
2269e89e DG |
356 | } |
357 | ||
358 | ret = lttcomm_close_unix_sock(ret); | |
359 | if (ret < 0) { | |
6f04ed72 | 360 | PERROR("lttcomm_close_unix_sock"); |
2269e89e DG |
361 | } |
362 | ||
363 | return 0; | |
2f70b271 DG |
364 | |
365 | error: | |
366 | return -1; | |
2269e89e DG |
367 | } |
368 | ||
369 | /* | |
2f70b271 DG |
370 | * Set sessiond socket path by putting it in the global sessiond_sock_path |
371 | * variable. | |
372 | * | |
373 | * Returns 0 on success, negative value on failure (the sessiond socket path | |
374 | * is somehow too long or ENOMEM). | |
947308c4 DG |
375 | */ |
376 | static int set_session_daemon_path(void) | |
377 | { | |
9ae110e2 | 378 | int in_tgroup = 0; /* In tracing group. */ |
2269e89e DG |
379 | uid_t uid; |
380 | ||
381 | uid = getuid(); | |
947308c4 | 382 | |
2269e89e DG |
383 | if (uid != 0) { |
384 | /* Are we in the tracing group ? */ | |
6c71277b | 385 | in_tgroup = lttng_check_tracing_group(); |
2269e89e DG |
386 | } |
387 | ||
408c55ab | 388 | if ((uid == 0) || in_tgroup == 1) { |
1da0efb1 JG |
389 | const int ret = lttng_strncpy(sessiond_sock_path, |
390 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, | |
391 | sizeof(sessiond_sock_path)); | |
392 | ||
393 | if (ret) { | |
394 | goto error; | |
395 | } | |
08a9c49f | 396 | } |
2269e89e | 397 | |
08a9c49f | 398 | if (uid != 0) { |
c617c0c6 MD |
399 | int ret; |
400 | ||
08a9c49f | 401 | if (in_tgroup) { |
9ae110e2 | 402 | /* Tracing group. */ |
08a9c49f TD |
403 | ret = try_connect_sessiond(sessiond_sock_path); |
404 | if (ret >= 0) { | |
405 | goto end; | |
2269e89e | 406 | } |
08a9c49f | 407 | /* Global session daemon not available... */ |
2269e89e | 408 | } |
08a9c49f TD |
409 | /* ...or not in tracing group (and not root), default */ |
410 | ||
411 | /* | |
9ae110e2 JG |
412 | * With GNU C < 2.1, snprintf returns -1 if the target buffer |
413 | * is too small; | |
414 | * With GNU C >= 2.1, snprintf returns the required size | |
415 | * (excluding closing null) | |
08a9c49f TD |
416 | */ |
417 | ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path), | |
feb0f3e5 | 418 | DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir()); |
08a9c49f | 419 | if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) { |
2f70b271 | 420 | goto error; |
947308c4 | 421 | } |
947308c4 | 422 | } |
08a9c49f | 423 | end: |
947308c4 | 424 | return 0; |
2f70b271 DG |
425 | |
426 | error: | |
427 | return -1; | |
947308c4 DG |
428 | } |
429 | ||
65beb5ff | 430 | /* |
9ae110e2 | 431 | * Connect to the LTTng session daemon. |
65beb5ff | 432 | * |
3e3665b8 | 433 | * On success, return the socket's file descriptor. On error, return -1. |
65beb5ff | 434 | */ |
3e3665b8 | 435 | LTTNG_HIDDEN int connect_sessiond(void) |
65beb5ff DG |
436 | { |
437 | int ret; | |
438 | ||
439 | ret = set_session_daemon_path(); | |
440 | if (ret < 0) { | |
2f70b271 | 441 | goto error; |
65beb5ff DG |
442 | } |
443 | ||
9ae110e2 | 444 | /* Connect to the sesssion daemon. */ |
65beb5ff DG |
445 | ret = lttcomm_connect_unix_sock(sessiond_sock_path); |
446 | if (ret < 0) { | |
2f70b271 | 447 | goto error; |
65beb5ff DG |
448 | } |
449 | ||
3e3665b8 | 450 | return ret; |
2f70b271 DG |
451 | |
452 | error: | |
453 | return -1; | |
65beb5ff DG |
454 | } |
455 | ||
3e3665b8 JG |
456 | static void reset_global_sessiond_connection_state(void) |
457 | { | |
458 | sessiond_socket = -1; | |
459 | connected = 0; | |
460 | } | |
461 | ||
65beb5ff | 462 | /* |
1c8d13c8 | 463 | * Clean disconnect from the session daemon. |
9ae110e2 | 464 | * |
1c8d13c8 | 465 | * On success, return 0. On error, return -1. |
65beb5ff DG |
466 | */ |
467 | static int disconnect_sessiond(void) | |
468 | { | |
469 | int ret = 0; | |
470 | ||
471 | if (connected) { | |
472 | ret = lttcomm_close_unix_sock(sessiond_socket); | |
3e3665b8 | 473 | reset_global_sessiond_connection_state(); |
65beb5ff DG |
474 | } |
475 | ||
476 | return ret; | |
477 | } | |
478 | ||
795a978d PP |
479 | static int recv_sessiond_optional_data(size_t len, void **user_buf, |
480 | size_t *user_len) | |
481 | { | |
482 | int ret = 0; | |
483 | void *buf = NULL; | |
484 | ||
485 | if (len) { | |
486 | if (!user_len) { | |
487 | ret = -LTTNG_ERR_INVALID; | |
488 | goto end; | |
489 | } | |
490 | ||
491 | buf = zmalloc(len); | |
492 | if (!buf) { | |
493 | ret = -ENOMEM; | |
494 | goto end; | |
495 | } | |
496 | ||
497 | ret = recv_data_sessiond(buf, len); | |
498 | if (ret < 0) { | |
499 | goto end; | |
500 | } | |
501 | ||
502 | if (!user_buf) { | |
503 | ret = -LTTNG_ERR_INVALID; | |
504 | goto end; | |
505 | } | |
506 | ||
507 | /* Move ownership of command header buffer to user. */ | |
508 | *user_buf = buf; | |
509 | buf = NULL; | |
510 | *user_len = len; | |
511 | } else { | |
512 | /* No command header. */ | |
513 | if (user_len) { | |
514 | *user_len = 0; | |
515 | } | |
516 | ||
517 | if (user_buf) { | |
518 | *user_buf = NULL; | |
519 | } | |
520 | } | |
521 | ||
522 | end: | |
523 | free(buf); | |
524 | return ret; | |
525 | } | |
526 | ||
35a6fdb7 | 527 | /* |
cd80958d | 528 | * Ask the session daemon a specific command and put the data into buf. |
a04d53fc FD |
529 | * Takes extra var. len. data and file descriptors as input to send to the |
530 | * session daemon. | |
65beb5ff | 531 | * |
af87c45a | 532 | * Return size of data (only payload, not header) or a negative error code. |
65beb5ff | 533 | */ |
cac3069d | 534 | LTTNG_HIDDEN |
a04d53fc FD |
535 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
536 | const int *fds, size_t nb_fd, const void *vardata, | |
537 | size_t vardata_len, void **user_payload_buf, | |
538 | void **user_cmd_header_buf, size_t *user_cmd_header_len) | |
65beb5ff DG |
539 | { |
540 | int ret; | |
795a978d | 541 | size_t payload_len; |
cd80958d | 542 | struct lttcomm_lttng_msg llm; |
65beb5ff DG |
543 | |
544 | ret = connect_sessiond(); | |
545 | if (ret < 0) { | |
2f70b271 | 546 | ret = -LTTNG_ERR_NO_SESSIOND; |
65beb5ff | 547 | goto end; |
3e3665b8 JG |
548 | } else { |
549 | sessiond_socket = ret; | |
550 | connected = 1; | |
65beb5ff DG |
551 | } |
552 | ||
65beb5ff | 553 | /* Send command to session daemon */ |
cd80958d | 554 | ret = send_session_msg(lsm); |
65beb5ff | 555 | if (ret < 0) { |
2f70b271 | 556 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
557 | goto end; |
558 | } | |
53a80697 | 559 | /* Send var len data */ |
795a978d | 560 | ret = send_session_varlen(vardata, vardata_len); |
53a80697 | 561 | if (ret < 0) { |
2f70b271 | 562 | /* Ret value is a valid lttng error code. */ |
53a80697 MD |
563 | goto end; |
564 | } | |
65beb5ff | 565 | |
a04d53fc FD |
566 | /* Send fds */ |
567 | ret = send_session_fds(fds, nb_fd); | |
568 | if (ret < 0) { | |
569 | /* Ret value is a valid lttng error code. */ | |
570 | goto end; | |
571 | } | |
572 | ||
65beb5ff DG |
573 | /* Get header from data transmission */ |
574 | ret = recv_data_sessiond(&llm, sizeof(llm)); | |
575 | if (ret < 0) { | |
2f70b271 | 576 | /* Ret value is a valid lttng error code. */ |
65beb5ff DG |
577 | goto end; |
578 | } | |
579 | ||
580 | /* Check error code if OK */ | |
f73fabfd | 581 | if (llm.ret_code != LTTNG_OK) { |
65beb5ff DG |
582 | ret = -llm.ret_code; |
583 | goto end; | |
584 | } | |
585 | ||
795a978d PP |
586 | /* Get command header from data transmission */ |
587 | ret = recv_sessiond_optional_data(llm.cmd_header_size, | |
588 | user_cmd_header_buf, user_cmd_header_len); | |
65beb5ff | 589 | if (ret < 0) { |
65beb5ff DG |
590 | goto end; |
591 | } | |
592 | ||
795a978d PP |
593 | /* Get payload from data transmission */ |
594 | ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf, | |
595 | &payload_len); | |
596 | if (ret < 0) { | |
83009e5e DG |
597 | goto end; |
598 | } | |
599 | ||
795a978d | 600 | ret = llm.data_size; |
65beb5ff DG |
601 | |
602 | end: | |
603 | disconnect_sessiond(); | |
604 | return ret; | |
605 | } | |
606 | ||
9f19cc17 | 607 | /* |
cd80958d | 608 | * Create lttng handle and return pointer. |
9ae110e2 | 609 | * |
1c8d13c8 | 610 | * The returned pointer will be NULL in case of malloc() error. |
9f19cc17 | 611 | */ |
cd80958d DG |
612 | struct lttng_handle *lttng_create_handle(const char *session_name, |
613 | struct lttng_domain *domain) | |
9f19cc17 | 614 | { |
1da0efb1 | 615 | int ret; |
2f70b271 DG |
616 | struct lttng_handle *handle = NULL; |
617 | ||
3f451dc0 | 618 | handle = zmalloc(sizeof(struct lttng_handle)); |
cd80958d | 619 | if (handle == NULL) { |
2f70b271 | 620 | PERROR("malloc handle"); |
cd80958d DG |
621 | goto end; |
622 | } | |
623 | ||
624 | /* Copy session name */ | |
1da0efb1 JG |
625 | ret = lttng_strncpy(handle->session_name, session_name ? : "", |
626 | sizeof(handle->session_name)); | |
627 | if (ret) { | |
628 | goto error; | |
629 | } | |
cd80958d | 630 | |
95681498 JG |
631 | /* Copy lttng domain or leave initialized to 0. */ |
632 | if (domain) { | |
633 | lttng_ctl_copy_lttng_domain(&handle->domain, domain); | |
634 | } | |
cd80958d DG |
635 | |
636 | end: | |
637 | return handle; | |
1da0efb1 JG |
638 | error: |
639 | free(handle); | |
640 | return NULL; | |
cd80958d DG |
641 | } |
642 | ||
643 | /* | |
644 | * Destroy handle by free(3) the pointer. | |
645 | */ | |
646 | void lttng_destroy_handle(struct lttng_handle *handle) | |
647 | { | |
0e428499 | 648 | free(handle); |
eb354453 DG |
649 | } |
650 | ||
d9800920 DG |
651 | /* |
652 | * Register an outside consumer. | |
9ae110e2 | 653 | * |
1c8d13c8 | 654 | * Returns size of returned session payload data or a negative error code. |
d9800920 DG |
655 | */ |
656 | int lttng_register_consumer(struct lttng_handle *handle, | |
657 | const char *socket_path) | |
658 | { | |
1da0efb1 | 659 | int ret; |
d9800920 DG |
660 | struct lttcomm_session_msg lsm; |
661 | ||
2f70b271 | 662 | if (handle == NULL || socket_path == NULL) { |
1da0efb1 JG |
663 | ret = -LTTNG_ERR_INVALID; |
664 | goto end; | |
2f70b271 DG |
665 | } |
666 | ||
53efb85a | 667 | memset(&lsm, 0, sizeof(lsm)); |
d9800920 | 668 | lsm.cmd_type = LTTNG_REGISTER_CONSUMER; |
1da0efb1 | 669 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
d9800920 | 670 | sizeof(lsm.session.name)); |
1da0efb1 JG |
671 | if (ret) { |
672 | ret = -LTTNG_ERR_INVALID; | |
673 | goto end; | |
674 | } | |
675 | ||
60160d2a | 676 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
d9800920 | 677 | |
1da0efb1 JG |
678 | ret = lttng_strncpy(lsm.u.reg.path, socket_path, |
679 | sizeof(lsm.u.reg.path)); | |
680 | if (ret) { | |
681 | ret = -LTTNG_ERR_INVALID; | |
682 | goto end; | |
683 | } | |
d9800920 | 684 | |
1da0efb1 JG |
685 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
686 | end: | |
687 | return ret; | |
d9800920 DG |
688 | } |
689 | ||
1df4dedd | 690 | /* |
9ae110e2 JG |
691 | * Start tracing for all traces of the session. |
692 | * | |
693 | * Returns size of returned session payload data or a negative error code. | |
1df4dedd | 694 | */ |
6a4f824d | 695 | int lttng_start_tracing(const char *session_name) |
f3ed775e | 696 | { |
1da0efb1 | 697 | int ret; |
cd80958d DG |
698 | struct lttcomm_session_msg lsm; |
699 | ||
6a4f824d | 700 | if (session_name == NULL) { |
1da0efb1 JG |
701 | ret = -LTTNG_ERR_INVALID; |
702 | goto end; | |
cd80958d DG |
703 | } |
704 | ||
53efb85a | 705 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 706 | lsm.cmd_type = LTTNG_START_TRACE; |
6a4f824d | 707 | |
1da0efb1 JG |
708 | ret = lttng_strncpy(lsm.session.name, session_name, |
709 | sizeof(lsm.session.name)); | |
710 | if (ret) { | |
711 | ret = -LTTNG_ERR_INVALID; | |
712 | goto end; | |
713 | } | |
cd80958d | 714 | |
1da0efb1 JG |
715 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
716 | end: | |
717 | return ret; | |
f3ed775e | 718 | } |
1df4dedd DG |
719 | |
720 | /* | |
38ee087f | 721 | * Stop tracing for all traces of the session. |
f3ed775e | 722 | */ |
38ee087f | 723 | static int _lttng_stop_tracing(const char *session_name, int wait) |
f3ed775e | 724 | { |
38ee087f | 725 | int ret, data_ret; |
cd80958d DG |
726 | struct lttcomm_session_msg lsm; |
727 | ||
6a4f824d | 728 | if (session_name == NULL) { |
1da0efb1 JG |
729 | ret = -LTTNG_ERR_INVALID; |
730 | goto error; | |
6a4f824d DG |
731 | } |
732 | ||
53efb85a | 733 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 734 | lsm.cmd_type = LTTNG_STOP_TRACE; |
6a4f824d | 735 | |
1da0efb1 JG |
736 | ret = lttng_strncpy(lsm.session.name, session_name, |
737 | sizeof(lsm.session.name)); | |
738 | if (ret) { | |
739 | ret = -LTTNG_ERR_INVALID; | |
740 | goto error; | |
741 | } | |
cd80958d | 742 | |
cac3069d | 743 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
38ee087f DG |
744 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { |
745 | goto error; | |
746 | } | |
747 | ||
748 | if (!wait) { | |
749 | goto end; | |
750 | } | |
751 | ||
38ee087f DG |
752 | /* Check for data availability */ |
753 | do { | |
6d805429 | 754 | data_ret = lttng_data_pending(session_name); |
38ee087f DG |
755 | if (data_ret < 0) { |
756 | /* Return the data available call error. */ | |
757 | ret = data_ret; | |
758 | goto error; | |
759 | } | |
760 | ||
761 | /* | |
9ae110e2 JG |
762 | * Data sleep time before retrying (in usec). Don't sleep if the |
763 | * call returned value indicates availability. | |
38ee087f | 764 | */ |
6d805429 | 765 | if (data_ret) { |
c8f61fd4 | 766 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME_US); |
38ee087f | 767 | } |
6d805429 | 768 | } while (data_ret != 0); |
38ee087f | 769 | |
38ee087f DG |
770 | end: |
771 | error: | |
772 | return ret; | |
773 | } | |
774 | ||
775 | /* | |
776 | * Stop tracing and wait for data availability. | |
777 | */ | |
778 | int lttng_stop_tracing(const char *session_name) | |
779 | { | |
780 | return _lttng_stop_tracing(session_name, 1); | |
781 | } | |
782 | ||
783 | /* | |
784 | * Stop tracing but _don't_ wait for data availability. | |
785 | */ | |
786 | int lttng_stop_tracing_no_wait(const char *session_name) | |
787 | { | |
788 | return _lttng_stop_tracing(session_name, 0); | |
f3ed775e DG |
789 | } |
790 | ||
791 | /* | |
601d5acf DG |
792 | * Add context to a channel. |
793 | * | |
794 | * If the given channel is NULL, add the contexts to all channels. | |
795 | * The event_name param is ignored. | |
af87c45a DG |
796 | * |
797 | * Returns the size of the returned payload data or a negative error code. | |
1df4dedd | 798 | */ |
cd80958d | 799 | int lttng_add_context(struct lttng_handle *handle, |
38057ed1 DG |
800 | struct lttng_event_context *ctx, const char *event_name, |
801 | const char *channel_name) | |
d65106b1 | 802 | { |
2001793c JG |
803 | int ret; |
804 | size_t len = 0; | |
805 | char *buf = NULL; | |
cd80958d DG |
806 | struct lttcomm_session_msg lsm; |
807 | ||
9ae110e2 | 808 | /* Safety check. Both are mandatory. */ |
9d697d3d | 809 | if (handle == NULL || ctx == NULL) { |
2001793c JG |
810 | ret = -LTTNG_ERR_INVALID; |
811 | goto end; | |
cd80958d DG |
812 | } |
813 | ||
441c16a7 | 814 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
815 | lsm.cmd_type = LTTNG_ADD_CONTEXT; |
816 | ||
85076754 | 817 | /* If no channel name, send empty string. */ |
1da0efb1 JG |
818 | ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", |
819 | sizeof(lsm.u.context.channel_name)); | |
820 | if (ret) { | |
821 | ret = -LTTNG_ERR_INVALID; | |
822 | goto end; | |
85076754 | 823 | } |
cd80958d | 824 | |
60160d2a | 825 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
1da0efb1 | 826 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 827 | sizeof(lsm.session.name)); |
1da0efb1 JG |
828 | if (ret) { |
829 | ret = -LTTNG_ERR_INVALID; | |
830 | goto end; | |
831 | } | |
cd80958d | 832 | |
2001793c JG |
833 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
834 | size_t provider_len, ctx_len; | |
835 | const char *provider_name = ctx->u.app_ctx.provider_name; | |
836 | const char *ctx_name = ctx->u.app_ctx.ctx_name; | |
837 | ||
838 | if (!provider_name || !ctx_name) { | |
839 | ret = -LTTNG_ERR_INVALID; | |
840 | goto end; | |
841 | } | |
842 | ||
843 | provider_len = strlen(provider_name); | |
844 | if (provider_len == 0) { | |
845 | ret = -LTTNG_ERR_INVALID; | |
846 | goto end; | |
847 | } | |
848 | lsm.u.context.provider_name_len = provider_len; | |
849 | ||
850 | ctx_len = strlen(ctx_name); | |
851 | if (ctx_len == 0) { | |
852 | ret = -LTTNG_ERR_INVALID; | |
853 | goto end; | |
854 | } | |
855 | lsm.u.context.context_name_len = ctx_len; | |
856 | ||
857 | len = provider_len + ctx_len; | |
858 | buf = zmalloc(len); | |
859 | if (!buf) { | |
860 | ret = -LTTNG_ERR_NOMEM; | |
861 | goto end; | |
862 | } | |
863 | ||
864 | memcpy(buf, provider_name, provider_len); | |
865 | memcpy(buf + provider_len, ctx_name, ctx_len); | |
866 | } | |
867 | memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context)); | |
46f44e2a JR |
868 | |
869 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
870 | /* | |
871 | * Don't leak application addresses to the sessiond. | |
872 | * This is only necessary when ctx is for an app ctx otherwise | |
873 | * the values inside the union (type & config) are overwritten. | |
874 | */ | |
875 | lsm.u.context.ctx.u.app_ctx.provider_name = NULL; | |
876 | lsm.u.context.ctx.u.app_ctx.ctx_name = NULL; | |
877 | } | |
2001793c | 878 | |
795a978d | 879 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL); |
2001793c JG |
880 | end: |
881 | free(buf); | |
882 | return ret; | |
d65106b1 DG |
883 | } |
884 | ||
f3ed775e | 885 | /* |
9ae110e2 JG |
886 | * Enable event(s) for a channel. |
887 | * | |
888 | * If no event name is specified, all events are enabled. | |
889 | * If no channel name is specified, the default 'channel0' is used. | |
890 | * | |
891 | * Returns size of returned session payload data or a negative error code. | |
f3ed775e | 892 | */ |
cd80958d | 893 | int lttng_enable_event(struct lttng_handle *handle, |
38057ed1 | 894 | struct lttng_event *ev, const char *channel_name) |
1df4dedd | 895 | { |
f8a96544 JI |
896 | return lttng_enable_event_with_exclusions(handle, ev, channel_name, |
897 | NULL, 0, NULL); | |
1df4dedd DG |
898 | } |
899 | ||
53a80697 | 900 | /* |
025faf73 | 901 | * Create or enable an event with a filter expression. |
178191b3 | 902 | * |
53a80697 MD |
903 | * Return negative error value on error. |
904 | * Return size of returned session payload data if OK. | |
905 | */ | |
025faf73 | 906 | int lttng_enable_event_with_filter(struct lttng_handle *handle, |
178191b3 | 907 | struct lttng_event *event, const char *channel_name, |
53a80697 MD |
908 | const char *filter_expression) |
909 | { | |
f8a96544 JI |
910 | return lttng_enable_event_with_exclusions(handle, event, channel_name, |
911 | filter_expression, 0, NULL); | |
53a80697 MD |
912 | } |
913 | ||
347c5ab5 | 914 | /* |
0e115563 | 915 | * Depending on the event, return a newly allocated agent filter expression or |
347c5ab5 DG |
916 | * NULL if not applicable. |
917 | * | |
918 | * An event with NO loglevel and the name is * will return NULL. | |
919 | */ | |
0e115563 | 920 | static char *set_agent_filter(const char *filter, struct lttng_event *ev) |
347c5ab5 DG |
921 | { |
922 | int err; | |
0e115563 | 923 | char *agent_filter = NULL; |
347c5ab5 DG |
924 | |
925 | assert(ev); | |
926 | ||
927 | /* Don't add filter for the '*' event. */ | |
9f449915 | 928 | if (strcmp(ev->name, "*") != 0) { |
347c5ab5 | 929 | if (filter) { |
0e115563 | 930 | err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter, |
347c5ab5 DG |
931 | ev->name); |
932 | } else { | |
0e115563 | 933 | err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name); |
347c5ab5 DG |
934 | } |
935 | if (err < 0) { | |
936 | PERROR("asprintf"); | |
6a556f7b | 937 | goto error; |
347c5ab5 DG |
938 | } |
939 | } | |
940 | ||
941 | /* Add loglevel filtering if any for the JUL domain. */ | |
942 | if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
cea15630 | 943 | const char *op; |
347c5ab5 DG |
944 | |
945 | if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
946 | op = ">="; | |
947 | } else { | |
948 | op = "=="; | |
949 | } | |
950 | ||
0e115563 | 951 | if (filter || agent_filter) { |
6a556f7b JG |
952 | char *new_filter; |
953 | ||
fb0edb23 | 954 | err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)", |
0e115563 | 955 | agent_filter ? agent_filter : filter, op, |
347c5ab5 | 956 | ev->loglevel); |
0e115563 DG |
957 | if (agent_filter) { |
958 | free(agent_filter); | |
6a556f7b | 959 | } |
0e115563 | 960 | agent_filter = new_filter; |
347c5ab5 | 961 | } else { |
0e115563 | 962 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
347c5ab5 DG |
963 | ev->loglevel); |
964 | } | |
965 | if (err < 0) { | |
966 | PERROR("asprintf"); | |
6a556f7b | 967 | goto error; |
347c5ab5 DG |
968 | } |
969 | } | |
970 | ||
0e115563 | 971 | return agent_filter; |
6a556f7b | 972 | error: |
0e115563 | 973 | free(agent_filter); |
6a556f7b | 974 | return NULL; |
347c5ab5 DG |
975 | } |
976 | ||
137b9942 | 977 | /* |
ec166985 | 978 | * Generate the filter bytecode from a given filter expression string. Put the |
137b9942 DG |
979 | * newly allocated parser context in ctxp and populate the lsm object with the |
980 | * expression len. | |
981 | * | |
982 | * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched. | |
983 | */ | |
984 | static int generate_filter(char *filter_expression, | |
985 | struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp) | |
986 | { | |
987 | int ret; | |
988 | struct filter_parser_ctx *ctx = NULL; | |
989 | FILE *fmem = NULL; | |
990 | ||
991 | assert(filter_expression); | |
992 | assert(lsm); | |
993 | assert(ctxp); | |
994 | ||
995 | /* | |
996 | * Casting const to non-const, as the underlying function will use it in | |
997 | * read-only mode. | |
998 | */ | |
999 | fmem = lttng_fmemopen((void *) filter_expression, | |
1000 | strlen(filter_expression), "r"); | |
1001 | if (!fmem) { | |
1002 | fprintf(stderr, "Error opening memory as stream\n"); | |
1003 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
1004 | goto error; | |
1005 | } | |
1006 | ctx = filter_parser_ctx_alloc(fmem); | |
1007 | if (!ctx) { | |
1008 | fprintf(stderr, "Error allocating parser\n"); | |
1009 | ret = -LTTNG_ERR_FILTER_NOMEM; | |
1010 | goto filter_alloc_error; | |
1011 | } | |
1012 | ret = filter_parser_ctx_append_ast(ctx); | |
1013 | if (ret) { | |
1014 | fprintf(stderr, "Parse error\n"); | |
1015 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1016 | goto parse_error; | |
1017 | } | |
137b9942 DG |
1018 | if (print_xml) { |
1019 | ret = filter_visitor_print_xml(ctx, stdout, 0); | |
1020 | if (ret) { | |
1021 | fflush(stdout); | |
1022 | fprintf(stderr, "XML print error\n"); | |
1023 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1024 | goto parse_error; | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | dbg_printf("Generating IR... "); | |
1029 | fflush(stdout); | |
1030 | ret = filter_visitor_ir_generate(ctx); | |
1031 | if (ret) { | |
1032 | fprintf(stderr, "Generate IR error\n"); | |
1033 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1034 | goto parse_error; | |
1035 | } | |
1036 | dbg_printf("done\n"); | |
1037 | ||
1038 | dbg_printf("Validating IR... "); | |
1039 | fflush(stdout); | |
1040 | ret = filter_visitor_ir_check_binary_op_nesting(ctx); | |
1041 | if (ret) { | |
1042 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1043 | goto parse_error; | |
1044 | } | |
9f449915 PP |
1045 | |
1046 | /* Normalize globbing patterns in the expression. */ | |
1047 | ret = filter_visitor_ir_normalize_glob_patterns(ctx); | |
1048 | if (ret) { | |
1049 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1050 | goto parse_error; | |
1051 | } | |
1052 | ||
9ae110e2 | 1053 | /* Validate strings used as literals in the expression. */ |
dcd5daf2 JG |
1054 | ret = filter_visitor_ir_validate_string(ctx); |
1055 | if (ret) { | |
1056 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1057 | goto parse_error; | |
1058 | } | |
9f449915 PP |
1059 | |
1060 | /* Validate globbing patterns in the expression. */ | |
1061 | ret = filter_visitor_ir_validate_globbing(ctx); | |
1062 | if (ret) { | |
1063 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1064 | goto parse_error; | |
1065 | } | |
1066 | ||
137b9942 DG |
1067 | dbg_printf("done\n"); |
1068 | ||
1069 | dbg_printf("Generating bytecode... "); | |
1070 | fflush(stdout); | |
1071 | ret = filter_visitor_bytecode_generate(ctx); | |
1072 | if (ret) { | |
1073 | fprintf(stderr, "Generate bytecode error\n"); | |
1074 | ret = -LTTNG_ERR_FILTER_INVAL; | |
1075 | goto parse_error; | |
1076 | } | |
1077 | dbg_printf("done\n"); | |
1078 | dbg_printf("Size of bytecode generated: %u bytes.\n", | |
1079 | bytecode_get_len(&ctx->bytecode->b)); | |
1080 | ||
1081 | lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b) | |
1082 | + bytecode_get_len(&ctx->bytecode->b); | |
1083 | lsm->u.enable.expression_len = strlen(filter_expression) + 1; | |
1084 | ||
1085 | /* No need to keep the memory stream. */ | |
1086 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1087 | PERROR("fclose"); |
137b9942 DG |
1088 | } |
1089 | ||
1090 | *ctxp = ctx; | |
1091 | return 0; | |
1092 | ||
1093 | parse_error: | |
137b9942 DG |
1094 | filter_ir_free(ctx); |
1095 | filter_parser_ctx_free(ctx); | |
1096 | filter_alloc_error: | |
1097 | if (fclose(fmem) != 0) { | |
6f04ed72 | 1098 | PERROR("fclose"); |
137b9942 DG |
1099 | } |
1100 | error: | |
1101 | return ret; | |
1102 | } | |
1103 | ||
93deb080 JI |
1104 | /* |
1105 | * Enable event(s) for a channel, possibly with exclusions and a filter. | |
1106 | * If no event name is specified, all events are enabled. | |
1107 | * If no channel name is specified, the default name is used. | |
1108 | * If filter expression is not NULL, the filter is set for the event. | |
1109 | * If exclusion count is not zero, the exclusions are set for the event. | |
1110 | * Returns size of returned session payload data or a negative error code. | |
1111 | */ | |
1112 | int lttng_enable_event_with_exclusions(struct lttng_handle *handle, | |
1113 | struct lttng_event *ev, const char *channel_name, | |
e9efbcd3 | 1114 | const char *original_filter_expression, |
93deb080 JI |
1115 | int exclusion_count, char **exclusion_list) |
1116 | { | |
1117 | struct lttcomm_session_msg lsm; | |
15e37663 JG |
1118 | struct lttng_dynamic_buffer send_buffer; |
1119 | int ret = 0, i, fd_to_send = -1; | |
1120 | bool send_fd = false; | |
137b9942 | 1121 | unsigned int free_filter_expression = 0; |
93deb080 | 1122 | struct filter_parser_ctx *ctx = NULL; |
ec005ec6 | 1123 | |
6a0838b7 YL |
1124 | /* |
1125 | * We have either a filter or some exclusions, so we need to set up | |
1126 | * a variable-length memory block from where to send the data. | |
1127 | */ | |
1128 | lttng_dynamic_buffer_init(&send_buffer); | |
ec005ec6 | 1129 | |
e9efbcd3 JG |
1130 | /* |
1131 | * Cast as non-const since we may replace the filter expression | |
1132 | * by a dynamically allocated string. Otherwise, the original | |
1133 | * string is not modified. | |
1134 | */ | |
1135 | char *filter_expression = (char *) original_filter_expression; | |
93deb080 JI |
1136 | |
1137 | if (handle == NULL || ev == NULL) { | |
137b9942 DG |
1138 | ret = -LTTNG_ERR_INVALID; |
1139 | goto error; | |
93deb080 JI |
1140 | } |
1141 | ||
9ae110e2 JG |
1142 | /* |
1143 | * Empty filter string will always be rejected by the parser | |
93deb080 JI |
1144 | * anyway, so treat this corner-case early to eliminate |
1145 | * lttng_fmemopen error for 0-byte allocation. | |
1146 | */ | |
1147 | if (filter_expression && filter_expression[0] == '\0') { | |
137b9942 DG |
1148 | ret = -LTTNG_ERR_INVALID; |
1149 | goto error; | |
93deb080 JI |
1150 | } |
1151 | ||
1152 | memset(&lsm, 0, sizeof(lsm)); | |
1153 | ||
1154 | /* If no channel name, send empty string. */ | |
1da0efb1 JG |
1155 | ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", |
1156 | sizeof(lsm.u.enable.channel_name)); | |
1157 | if (ret) { | |
1158 | ret = -LTTNG_ERR_INVALID; | |
1159 | goto error; | |
93deb080 JI |
1160 | } |
1161 | ||
18a720cd MD |
1162 | lsm.cmd_type = LTTNG_ENABLE_EVENT; |
1163 | if (ev->name[0] == '\0') { | |
1da0efb1 JG |
1164 | /* Enable all events. */ |
1165 | ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); | |
1166 | assert(ret == 0); | |
6565421f | 1167 | } |
93deb080 | 1168 | |
60160d2a | 1169 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
93deb080 JI |
1170 | memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); |
1171 | ||
1da0efb1 | 1172 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
93deb080 | 1173 | sizeof(lsm.session.name)); |
1da0efb1 JG |
1174 | if (ret) { |
1175 | ret = -LTTNG_ERR_INVALID; | |
1176 | goto error; | |
1177 | } | |
1178 | ||
93deb080 JI |
1179 | lsm.u.enable.exclusion_count = exclusion_count; |
1180 | lsm.u.enable.bytecode_len = 0; | |
1181 | ||
9ae110e2 | 1182 | /* Parse filter expression. */ |
5cdb6027 | 1183 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL |
0e115563 DG |
1184 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1185 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
5cdb6027 | 1186 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1187 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1188 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1189 | char *agent_filter; | |
64226865 | 1190 | |
347c5ab5 | 1191 | /* Setup JUL filter if needed. */ |
0e115563 DG |
1192 | agent_filter = set_agent_filter(filter_expression, ev); |
1193 | if (!agent_filter) { | |
137b9942 | 1194 | if (!filter_expression) { |
9ae110e2 JG |
1195 | /* |
1196 | * No JUL and no filter, just skip | |
1197 | * everything below. | |
1198 | */ | |
137b9942 DG |
1199 | goto ask_sessiond; |
1200 | } | |
64226865 DG |
1201 | } else { |
1202 | /* | |
9ae110e2 JG |
1203 | * With an agent filter, the original filter has |
1204 | * been added to it thus replace the filter | |
1205 | * expression. | |
64226865 | 1206 | */ |
0e115563 | 1207 | filter_expression = agent_filter; |
e9efbcd3 | 1208 | free_filter_expression = 1; |
9b21e6d5 | 1209 | } |
9b21e6d5 | 1210 | } |
93deb080 | 1211 | |
137b9942 | 1212 | ret = generate_filter(filter_expression, &lsm, &ctx); |
93deb080 | 1213 | if (ret) { |
137b9942 | 1214 | goto filter_error; |
93deb080 | 1215 | } |
6b453b5e JG |
1216 | } |
1217 | ||
15e37663 JG |
1218 | ret = lttng_dynamic_buffer_set_capacity(&send_buffer, |
1219 | lsm.u.enable.bytecode_len | |
137b9942 DG |
1220 | + lsm.u.enable.expression_len |
1221 | + LTTNG_SYMBOL_NAME_LEN * exclusion_count); | |
15e37663 | 1222 | if (ret) { |
6b453b5e | 1223 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; |
7ca1dc6f | 1224 | goto mem_error; |
6b453b5e | 1225 | } |
137b9942 | 1226 | |
9ae110e2 | 1227 | /* Put exclusion names first in the data. */ |
15e37663 JG |
1228 | for (i = 0; i < exclusion_count; i++) { |
1229 | size_t exclusion_len; | |
1230 | ||
1231 | exclusion_len = lttng_strnlen(*(exclusion_list + i), | |
1232 | LTTNG_SYMBOL_NAME_LEN); | |
1233 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
1234 | /* Exclusion is not NULL-terminated. */ | |
1235 | ret = -LTTNG_ERR_INVALID; | |
1236 | goto mem_error; | |
1237 | } | |
1238 | ||
1239 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1240 | *(exclusion_list + i), | |
1241 | LTTNG_SYMBOL_NAME_LEN); | |
1242 | if (ret) { | |
1243 | goto mem_error; | |
1244 | } | |
6b453b5e | 1245 | } |
15e37663 | 1246 | |
9ae110e2 | 1247 | /* Add filter expression next. */ |
15e37663 JG |
1248 | if (filter_expression) { |
1249 | ret = lttng_dynamic_buffer_append(&send_buffer, | |
1250 | filter_expression, lsm.u.enable.expression_len); | |
1251 | if (ret) { | |
1252 | goto mem_error; | |
1253 | } | |
6b453b5e | 1254 | } |
9ae110e2 | 1255 | /* Add filter bytecode next. */ |
137b9942 | 1256 | if (ctx && lsm.u.enable.bytecode_len != 0) { |
15e37663 JG |
1257 | ret = lttng_dynamic_buffer_append(&send_buffer, |
1258 | &ctx->bytecode->b, lsm.u.enable.bytecode_len); | |
1259 | if (ret) { | |
1260 | goto mem_error; | |
1261 | } | |
1262 | } | |
1263 | if (ev->extended.ptr) { | |
1264 | struct lttng_event_extended *ev_ext = | |
1265 | (struct lttng_event_extended *) ev->extended.ptr; | |
1266 | ||
1267 | if (ev_ext->probe_location) { | |
1268 | /* | |
1269 | * lttng_userspace_probe_location_serialize returns the | |
1270 | * number of bytes that was appended to the buffer. | |
1271 | */ | |
1272 | ret = lttng_userspace_probe_location_serialize( | |
1273 | ev_ext->probe_location, &send_buffer, | |
1274 | &fd_to_send); | |
56f0bc67 | 1275 | if (ret < 0) { |
15e37663 JG |
1276 | goto mem_error; |
1277 | } | |
1278 | ||
1279 | send_fd = fd_to_send >= 0; | |
1280 | /* | |
1281 | * Set the size of the userspace probe location element | |
1282 | * of the buffer so that the receiving side knows where | |
1283 | * to split it. | |
1284 | */ | |
1285 | lsm.u.enable.userspace_probe_location_len = ret; | |
1286 | } | |
93deb080 JI |
1287 | } |
1288 | ||
15e37663 JG |
1289 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, |
1290 | send_fd ? &fd_to_send : NULL, | |
1291 | send_fd ? 1 : 0, | |
1292 | send_buffer.size ? send_buffer.data : NULL, | |
1293 | send_buffer.size, NULL, NULL, 0); | |
93deb080 | 1294 | |
7ca1dc6f DG |
1295 | mem_error: |
1296 | if (filter_expression && ctx) { | |
93deb080 JI |
1297 | filter_bytecode_free(ctx); |
1298 | filter_ir_free(ctx); | |
1299 | filter_parser_ctx_free(ctx); | |
7ca1dc6f DG |
1300 | } |
1301 | filter_error: | |
1302 | if (free_filter_expression) { | |
1303 | /* | |
9ae110e2 JG |
1304 | * The filter expression has been replaced and must be freed as |
1305 | * it is not the original filter expression received as a | |
1306 | * parameter. | |
7ca1dc6f DG |
1307 | */ |
1308 | free(filter_expression); | |
93deb080 | 1309 | } |
137b9942 DG |
1310 | error: |
1311 | /* | |
9ae110e2 JG |
1312 | * Return directly to the caller and don't ask the sessiond since |
1313 | * something went wrong in the parsing of data above. | |
137b9942 | 1314 | */ |
15e37663 | 1315 | lttng_dynamic_buffer_reset(&send_buffer); |
93deb080 | 1316 | return ret; |
3e1c9ff7 DG |
1317 | |
1318 | ask_sessiond: | |
1319 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1320 | return ret; | |
93deb080 JI |
1321 | } |
1322 | ||
6e911cad MD |
1323 | int lttng_disable_event_ext(struct lttng_handle *handle, |
1324 | struct lttng_event *ev, const char *channel_name, | |
1325 | const char *original_filter_expression) | |
1df4dedd | 1326 | { |
cd80958d | 1327 | struct lttcomm_session_msg lsm; |
6e911cad MD |
1328 | char *varlen_data; |
1329 | int ret = 0; | |
1330 | unsigned int free_filter_expression = 0; | |
1331 | struct filter_parser_ctx *ctx = NULL; | |
1332 | /* | |
1333 | * Cast as non-const since we may replace the filter expression | |
1334 | * by a dynamically allocated string. Otherwise, the original | |
1335 | * string is not modified. | |
1336 | */ | |
1337 | char *filter_expression = (char *) original_filter_expression; | |
1df4dedd | 1338 | |
6e911cad MD |
1339 | if (handle == NULL || ev == NULL) { |
1340 | ret = -LTTNG_ERR_INVALID; | |
1341 | goto error; | |
1342 | } | |
1343 | ||
9ae110e2 JG |
1344 | /* |
1345 | * Empty filter string will always be rejected by the parser | |
6e911cad MD |
1346 | * anyway, so treat this corner-case early to eliminate |
1347 | * lttng_fmemopen error for 0-byte allocation. | |
1348 | */ | |
1349 | if (filter_expression && filter_expression[0] == '\0') { | |
1350 | ret = -LTTNG_ERR_INVALID; | |
1351 | goto error; | |
cd80958d DG |
1352 | } |
1353 | ||
441c16a7 MD |
1354 | memset(&lsm, 0, sizeof(lsm)); |
1355 | ||
85076754 | 1356 | /* If no channel name, send empty string. */ |
1da0efb1 JG |
1357 | ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", |
1358 | sizeof(lsm.u.disable.channel_name)); | |
1359 | if (ret) { | |
1360 | ret = -LTTNG_ERR_INVALID; | |
1361 | goto error; | |
eb354453 DG |
1362 | } |
1363 | ||
18a720cd | 1364 | lsm.cmd_type = LTTNG_DISABLE_EVENT; |
f3ed775e | 1365 | |
60160d2a | 1366 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
6e911cad MD |
1367 | memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); |
1368 | ||
1da0efb1 | 1369 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 1370 | sizeof(lsm.session.name)); |
1da0efb1 JG |
1371 | if (ret) { |
1372 | ret = -LTTNG_ERR_INVALID; | |
1373 | goto error; | |
1374 | } | |
1375 | ||
6e911cad | 1376 | lsm.u.disable.bytecode_len = 0; |
cd80958d | 1377 | |
6e911cad MD |
1378 | /* |
1379 | * For the JUL domain, a filter is enforced except for the | |
1380 | * disable all event. This is done to avoid having the event in | |
1381 | * all sessions thus filtering by logger name. | |
1382 | */ | |
1383 | if (filter_expression == NULL && | |
1384 | (handle->domain.type != LTTNG_DOMAIN_JUL && | |
0e115563 DG |
1385 | handle->domain.type != LTTNG_DOMAIN_LOG4J && |
1386 | handle->domain.type != LTTNG_DOMAIN_PYTHON)) { | |
6e911cad MD |
1387 | goto ask_sessiond; |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * We have a filter, so we need to set up a variable-length | |
1392 | * memory block from where to send the data. | |
1393 | */ | |
1394 | ||
1395 | /* Parse filter expression */ | |
1396 | if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL | |
0e115563 DG |
1397 | || handle->domain.type == LTTNG_DOMAIN_LOG4J |
1398 | || handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
6e911cad | 1399 | if (handle->domain.type == LTTNG_DOMAIN_JUL || |
0e115563 DG |
1400 | handle->domain.type == LTTNG_DOMAIN_LOG4J || |
1401 | handle->domain.type == LTTNG_DOMAIN_PYTHON) { | |
1402 | char *agent_filter; | |
6e911cad MD |
1403 | |
1404 | /* Setup JUL filter if needed. */ | |
0e115563 DG |
1405 | agent_filter = set_agent_filter(filter_expression, ev); |
1406 | if (!agent_filter) { | |
6e911cad | 1407 | if (!filter_expression) { |
9ae110e2 JG |
1408 | /* |
1409 | * No JUL and no filter, just skip | |
1410 | * everything below. | |
1411 | */ | |
6e911cad MD |
1412 | goto ask_sessiond; |
1413 | } | |
1414 | } else { | |
1415 | /* | |
9ae110e2 JG |
1416 | * With a JUL filter, the original filter has |
1417 | * been added to it thus replace the filter | |
1418 | * expression. | |
6e911cad | 1419 | */ |
0e115563 | 1420 | filter_expression = agent_filter; |
6e911cad MD |
1421 | free_filter_expression = 1; |
1422 | } | |
1423 | } | |
1424 | ||
1425 | ret = generate_filter(filter_expression, &lsm, &ctx); | |
1426 | if (ret) { | |
1427 | goto filter_error; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | varlen_data = zmalloc(lsm.u.disable.bytecode_len | |
1432 | + lsm.u.disable.expression_len); | |
1433 | if (!varlen_data) { | |
1434 | ret = -LTTNG_ERR_EXCLUSION_NOMEM; | |
1435 | goto mem_error; | |
1436 | } | |
1437 | ||
9ae110e2 | 1438 | /* Add filter expression. */ |
6e911cad MD |
1439 | if (lsm.u.disable.expression_len != 0) { |
1440 | memcpy(varlen_data, | |
1441 | filter_expression, | |
1442 | lsm.u.disable.expression_len); | |
1443 | } | |
9ae110e2 | 1444 | /* Add filter bytecode next. */ |
6e911cad MD |
1445 | if (ctx && lsm.u.disable.bytecode_len != 0) { |
1446 | memcpy(varlen_data | |
1447 | + lsm.u.disable.expression_len, | |
1448 | &ctx->bytecode->b, | |
1449 | lsm.u.disable.bytecode_len); | |
1450 | } | |
1451 | ||
795a978d | 1452 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data, |
6e911cad MD |
1453 | lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL); |
1454 | free(varlen_data); | |
1455 | ||
1456 | mem_error: | |
1457 | if (filter_expression && ctx) { | |
1458 | filter_bytecode_free(ctx); | |
1459 | filter_ir_free(ctx); | |
1460 | filter_parser_ctx_free(ctx); | |
1461 | } | |
1462 | filter_error: | |
1463 | if (free_filter_expression) { | |
1464 | /* | |
9ae110e2 JG |
1465 | * The filter expression has been replaced and must be freed as |
1466 | * it is not the original filter expression received as a | |
1467 | * parameter. | |
6e911cad MD |
1468 | */ |
1469 | free(filter_expression); | |
1470 | } | |
1471 | error: | |
1472 | /* | |
9ae110e2 JG |
1473 | * Return directly to the caller and don't ask the sessiond since |
1474 | * something went wrong in the parsing of data above. | |
6e911cad MD |
1475 | */ |
1476 | return ret; | |
1477 | ||
1478 | ask_sessiond: | |
1479 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
1480 | return ret; | |
1481 | } | |
1482 | ||
1483 | /* | |
9ae110e2 JG |
1484 | * Disable event(s) of a channel and domain. |
1485 | * If no event name is specified, all events are disabled. | |
1486 | * If no channel name is specified, the default 'channel0' is used. | |
1487 | * Returns size of returned session payload data or a negative error code. | |
6e911cad MD |
1488 | */ |
1489 | int lttng_disable_event(struct lttng_handle *handle, const char *name, | |
1490 | const char *channel_name) | |
1491 | { | |
1da0efb1 | 1492 | int ret; |
6e911cad MD |
1493 | struct lttng_event ev; |
1494 | ||
1495 | memset(&ev, 0, sizeof(ev)); | |
9b7431cf | 1496 | ev.loglevel = -1; |
6e911cad | 1497 | ev.type = LTTNG_EVENT_ALL; |
1da0efb1 JG |
1498 | ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); |
1499 | if (ret) { | |
1500 | ret = -LTTNG_ERR_INVALID; | |
1501 | goto end; | |
1502 | } | |
1503 | ||
1504 | ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); | |
1505 | end: | |
1506 | return ret; | |
1df4dedd DG |
1507 | } |
1508 | ||
cf0bcb51 JG |
1509 | struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) |
1510 | { | |
1511 | struct lttng_channel *channel = NULL; | |
1512 | struct lttng_channel_extended *extended = NULL; | |
1513 | ||
1514 | if (!domain) { | |
1515 | goto error; | |
1516 | } | |
1517 | ||
1518 | /* Validate domain. */ | |
1519 | switch (domain->type) { | |
1520 | case LTTNG_DOMAIN_UST: | |
1521 | switch (domain->buf_type) { | |
1522 | case LTTNG_BUFFER_PER_UID: | |
1523 | case LTTNG_BUFFER_PER_PID: | |
1524 | break; | |
1525 | default: | |
1526 | goto error; | |
1527 | } | |
1528 | break; | |
1529 | case LTTNG_DOMAIN_KERNEL: | |
1530 | if (domain->buf_type != LTTNG_BUFFER_GLOBAL) { | |
1531 | goto error; | |
1532 | } | |
1533 | break; | |
1534 | default: | |
1535 | goto error; | |
1536 | } | |
1537 | ||
1538 | channel = zmalloc(sizeof(*channel)); | |
1539 | if (!channel) { | |
1540 | goto error; | |
1541 | } | |
1542 | ||
1543 | extended = zmalloc(sizeof(*extended)); | |
1544 | if (!extended) { | |
1545 | goto error; | |
1546 | } | |
1547 | ||
1548 | channel->attr.extended.ptr = extended; | |
1549 | ||
1550 | lttng_channel_set_default_attr(domain, &channel->attr); | |
1551 | return channel; | |
1552 | error: | |
1553 | free(channel); | |
1554 | free(extended); | |
1555 | return NULL; | |
1556 | } | |
1557 | ||
1558 | void lttng_channel_destroy(struct lttng_channel *channel) | |
1559 | { | |
1560 | if (!channel) { | |
1561 | return; | |
1562 | } | |
1563 | ||
1564 | if (channel->attr.extended.ptr) { | |
1565 | free(channel->attr.extended.ptr); | |
1566 | } | |
1567 | free(channel); | |
1568 | } | |
1569 | ||
1df4dedd | 1570 | /* |
9ae110e2 JG |
1571 | * Enable channel per domain |
1572 | * Returns size of returned session payload data or a negative error code. | |
a5c5a2bd | 1573 | */ |
cd80958d | 1574 | int lttng_enable_channel(struct lttng_handle *handle, |
cf0bcb51 | 1575 | struct lttng_channel *in_chan) |
a5c5a2bd | 1576 | { |
f9f927bc | 1577 | enum lttng_error_code ret_code; |
1da0efb1 | 1578 | int ret; |
cd80958d | 1579 | struct lttcomm_session_msg lsm; |
f9f927bc | 1580 | uint64_t total_buffer_size_needed_per_cpu = 0; |
cd80958d | 1581 | |
9ae110e2 | 1582 | /* NULL arguments are forbidden. No default values. */ |
cf0bcb51 | 1583 | if (handle == NULL || in_chan == NULL) { |
2f70b271 | 1584 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1585 | } |
1586 | ||
441c16a7 | 1587 | memset(&lsm, 0, sizeof(lsm)); |
cf0bcb51 JG |
1588 | memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan)); |
1589 | lsm.u.channel.chan.attr.extended.ptr = NULL; | |
441c16a7 | 1590 | |
cf0bcb51 JG |
1591 | if (!in_chan->attr.extended.ptr) { |
1592 | struct lttng_channel *channel; | |
1593 | struct lttng_channel_extended *extended; | |
7d29a247 | 1594 | |
cf0bcb51 JG |
1595 | channel = lttng_channel_create(&handle->domain); |
1596 | if (!channel) { | |
1597 | return -LTTNG_ERR_NOMEM; | |
1598 | } | |
1599 | ||
1600 | /* | |
1601 | * Create a new channel in order to use default extended | |
1602 | * attribute values. | |
1603 | */ | |
1604 | extended = (struct lttng_channel_extended *) | |
1605 | channel->attr.extended.ptr; | |
1606 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1607 | lttng_channel_destroy(channel); | |
1608 | } else { | |
1609 | struct lttng_channel_extended *extended; | |
1610 | ||
1611 | extended = (struct lttng_channel_extended *) | |
1612 | in_chan->attr.extended.ptr; | |
1613 | memcpy(&lsm.u.channel.extended, extended, sizeof(*extended)); | |
1614 | } | |
cd80958d | 1615 | |
09b72f7a FD |
1616 | /* |
1617 | * Verify that the amount of memory required to create the requested | |
1618 | * buffer is available on the system at the moment. | |
1619 | */ | |
f9f927bc JR |
1620 | if (lsm.u.channel.chan.attr.num_subbuf > |
1621 | UINT64_MAX / lsm.u.channel.chan.attr.subbuf_size) { | |
1622 | /* Overflow */ | |
1623 | ret = -LTTNG_ERR_OVERFLOW; | |
1624 | goto end; | |
1625 | } | |
1626 | ||
09b72f7a FD |
1627 | total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf * |
1628 | lsm.u.channel.chan.attr.subbuf_size; | |
f9f927bc JR |
1629 | ret_code = check_enough_available_memory( |
1630 | total_buffer_size_needed_per_cpu); | |
1631 | if (ret_code != LTTNG_OK) { | |
1632 | ret = -ret_code; | |
1633 | goto end; | |
09b72f7a FD |
1634 | } |
1635 | ||
cf0bcb51 | 1636 | lsm.cmd_type = LTTNG_ENABLE_CHANNEL; |
60160d2a | 1637 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
7d29a247 | 1638 | |
1da0efb1 JG |
1639 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1640 | sizeof(lsm.session.name)); | |
1641 | if (ret) { | |
1642 | ret = -LTTNG_ERR_INVALID; | |
1643 | goto end; | |
1644 | } | |
cd80958d | 1645 | |
1da0efb1 JG |
1646 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1647 | end: | |
1648 | return ret; | |
8c0faa1d | 1649 | } |
1df4dedd | 1650 | |
2ef84c95 | 1651 | /* |
9ae110e2 JG |
1652 | * All tracing will be stopped for registered events of the channel. |
1653 | * Returns size of returned session payload data or a negative error code. | |
2ef84c95 | 1654 | */ |
cd80958d | 1655 | int lttng_disable_channel(struct lttng_handle *handle, const char *name) |
2ef84c95 | 1656 | { |
1da0efb1 | 1657 | int ret; |
cd80958d DG |
1658 | struct lttcomm_session_msg lsm; |
1659 | ||
9ae110e2 | 1660 | /* Safety check. Both are mandatory. */ |
9d697d3d | 1661 | if (handle == NULL || name == NULL) { |
2f70b271 | 1662 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
1663 | } |
1664 | ||
441c16a7 MD |
1665 | memset(&lsm, 0, sizeof(lsm)); |
1666 | ||
cd80958d | 1667 | lsm.cmd_type = LTTNG_DISABLE_CHANNEL; |
1df4dedd | 1668 | |
1da0efb1 | 1669 | ret = lttng_strncpy(lsm.u.disable.channel_name, name, |
9d697d3d | 1670 | sizeof(lsm.u.disable.channel_name)); |
1da0efb1 JG |
1671 | if (ret) { |
1672 | ret = -LTTNG_ERR_INVALID; | |
1673 | goto end; | |
1674 | } | |
9d697d3d | 1675 | |
60160d2a | 1676 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
cd80958d | 1677 | |
1da0efb1 JG |
1678 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
1679 | sizeof(lsm.session.name)); | |
1680 | if (ret) { | |
1681 | ret = -LTTNG_ERR_INVALID; | |
1682 | goto end; | |
1683 | } | |
cd80958d | 1684 | |
1da0efb1 JG |
1685 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
1686 | end: | |
1687 | return ret; | |
ca95a216 DG |
1688 | } |
1689 | ||
fac6795d | 1690 | /* |
9ae110e2 JG |
1691 | * Lists all available tracepoints of domain. |
1692 | * Sets the contents of the events array. | |
1693 | * Returns the number of lttng_event entries in events; | |
1694 | * on error, returns a negative value. | |
fac6795d | 1695 | */ |
cd80958d | 1696 | int lttng_list_tracepoints(struct lttng_handle *handle, |
2a71efd5 | 1697 | struct lttng_event **events) |
fac6795d | 1698 | { |
052da939 | 1699 | int ret; |
cd80958d DG |
1700 | struct lttcomm_session_msg lsm; |
1701 | ||
9d697d3d | 1702 | if (handle == NULL) { |
2f70b271 | 1703 | return -LTTNG_ERR_INVALID; |
cd80958d | 1704 | } |
fac6795d | 1705 | |
53efb85a | 1706 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 1707 | lsm.cmd_type = LTTNG_LIST_TRACEPOINTS; |
60160d2a | 1708 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
2a71efd5 | 1709 | |
cac3069d | 1710 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); |
052da939 DG |
1711 | if (ret < 0) { |
1712 | return ret; | |
eb354453 | 1713 | } |
fac6795d | 1714 | |
9f19cc17 | 1715 | return ret / sizeof(struct lttng_event); |
fac6795d DG |
1716 | } |
1717 | ||
f37d259d | 1718 | /* |
9ae110e2 JG |
1719 | * Lists all available tracepoint fields of domain. |
1720 | * Sets the contents of the event field array. | |
1721 | * Returns the number of lttng_event_field entries in events; | |
1722 | * on error, returns a negative value. | |
f37d259d MD |
1723 | */ |
1724 | int lttng_list_tracepoint_fields(struct lttng_handle *handle, | |
1725 | struct lttng_event_field **fields) | |
1726 | { | |
1727 | int ret; | |
1728 | struct lttcomm_session_msg lsm; | |
1729 | ||
1730 | if (handle == NULL) { | |
2f70b271 | 1731 | return -LTTNG_ERR_INVALID; |
f37d259d MD |
1732 | } |
1733 | ||
53efb85a | 1734 | memset(&lsm, 0, sizeof(lsm)); |
f37d259d | 1735 | lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS; |
60160d2a | 1736 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
f37d259d | 1737 | |
cac3069d | 1738 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields); |
f37d259d MD |
1739 | if (ret < 0) { |
1740 | return ret; | |
1741 | } | |
1742 | ||
1743 | return ret / sizeof(struct lttng_event_field); | |
1744 | } | |
1745 | ||
834978fd | 1746 | /* |
9ae110e2 JG |
1747 | * Lists all available kernel system calls. Allocates and sets the contents of |
1748 | * the events array. | |
834978fd | 1749 | * |
9ae110e2 JG |
1750 | * Returns the number of lttng_event entries in events; on error, returns a |
1751 | * negative value. | |
834978fd DG |
1752 | */ |
1753 | int lttng_list_syscalls(struct lttng_event **events) | |
1754 | { | |
1755 | int ret; | |
1756 | struct lttcomm_session_msg lsm; | |
1757 | ||
1758 | if (!events) { | |
1759 | return -LTTNG_ERR_INVALID; | |
1760 | } | |
1761 | ||
1762 | memset(&lsm, 0, sizeof(lsm)); | |
1763 | lsm.cmd_type = LTTNG_LIST_SYSCALLS; | |
1764 | /* Force kernel domain for system calls. */ | |
1765 | lsm.domain.type = LTTNG_DOMAIN_KERNEL; | |
1766 | ||
1767 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) events); | |
1768 | if (ret < 0) { | |
1769 | return ret; | |
1770 | } | |
1771 | ||
1772 | return ret / sizeof(struct lttng_event); | |
1773 | } | |
1774 | ||
1657e9bb | 1775 | /* |
9ae110e2 JG |
1776 | * Returns a human readable string describing |
1777 | * the error code (a negative value). | |
1657e9bb | 1778 | */ |
9a745bc7 | 1779 | const char *lttng_strerror(int code) |
1657e9bb | 1780 | { |
f73fabfd | 1781 | return error_get_str(code); |
1657e9bb DG |
1782 | } |
1783 | ||
b178f53e JG |
1784 | enum lttng_error_code lttng_create_session_ext( |
1785 | struct lttng_session_descriptor *session_descriptor) | |
1786 | { | |
1787 | enum lttng_error_code ret_code; | |
1788 | struct lttcomm_session_msg lsm = { | |
1789 | .cmd_type = LTTNG_CREATE_SESSION_EXT, | |
1790 | }; | |
1791 | void *reply = NULL; | |
1792 | struct lttng_buffer_view reply_view; | |
1793 | int reply_ret; | |
1794 | bool sessiond_must_generate_ouput; | |
1795 | struct lttng_dynamic_buffer payload; | |
1796 | int ret; | |
1797 | size_t descriptor_size; | |
1798 | struct lttng_session_descriptor *descriptor_reply = NULL; | |
1799 | ||
1800 | lttng_dynamic_buffer_init(&payload); | |
1801 | if (!session_descriptor) { | |
1802 | ret_code = LTTNG_ERR_INVALID; | |
1803 | goto end; | |
1804 | } | |
1805 | ||
1806 | sessiond_must_generate_ouput = | |
1807 | !lttng_session_descriptor_is_output_destination_initialized( | |
1808 | session_descriptor); | |
1809 | if (sessiond_must_generate_ouput) { | |
1810 | const char *home_dir = utils_get_home_dir(); | |
1811 | size_t home_dir_len = home_dir ? strlen(home_dir) + 1 : 0; | |
1812 | ||
1813 | if (!home_dir || home_dir_len > LTTNG_PATH_MAX) { | |
1814 | ret_code = LTTNG_ERR_FATAL; | |
1815 | goto end; | |
1816 | } | |
1817 | ||
1818 | lsm.u.create_session.home_dir_size = (uint16_t) home_dir_len; | |
1819 | ret = lttng_dynamic_buffer_append(&payload, home_dir, | |
1820 | home_dir_len); | |
1821 | if (ret) { | |
1822 | ret_code = LTTNG_ERR_NOMEM; | |
1823 | goto end; | |
1824 | } | |
1825 | } | |
1826 | ||
1827 | descriptor_size = payload.size; | |
1828 | ret = lttng_session_descriptor_serialize(session_descriptor, | |
1829 | &payload); | |
1830 | if (ret) { | |
1831 | ret_code = LTTNG_ERR_INVALID; | |
1832 | goto end; | |
1833 | } | |
1834 | descriptor_size = payload.size - descriptor_size; | |
1835 | lsm.u.create_session.session_descriptor_size = descriptor_size; | |
1836 | ||
1837 | /* Command returns a session descriptor on success. */ | |
1838 | reply_ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, payload.data, | |
1839 | payload.size, &reply); | |
1840 | if (reply_ret < 0) { | |
1841 | ret_code = -reply_ret; | |
1842 | goto end; | |
1843 | } else if (reply_ret == 0) { | |
1844 | /* Socket unexpectedly closed by the session daemon. */ | |
1845 | ret_code = LTTNG_ERR_FATAL; | |
1846 | goto end; | |
1847 | } | |
1848 | ||
1849 | reply_view = lttng_buffer_view_init(reply, 0, reply_ret); | |
1850 | ret = lttng_session_descriptor_create_from_buffer(&reply_view, | |
1851 | &descriptor_reply); | |
1852 | if (ret < 0) { | |
1853 | ret_code = LTTNG_ERR_FATAL; | |
1854 | goto end; | |
1855 | } | |
1856 | ret_code = LTTNG_OK; | |
1857 | lttng_session_descriptor_assign(session_descriptor, descriptor_reply); | |
1858 | end: | |
1859 | free(reply); | |
1860 | lttng_dynamic_buffer_reset(&payload); | |
1861 | lttng_session_descriptor_destroy(descriptor_reply); | |
1862 | return ret_code; | |
1863 | } | |
1864 | ||
aaf97519 | 1865 | /* |
b178f53e | 1866 | * Create a new session using name and url for destination. |
a4b92340 | 1867 | * |
780d4bb8 | 1868 | * Return 0 on success else a negative LTTng error code. |
00e2e675 | 1869 | */ |
a4b92340 | 1870 | int lttng_create_session(const char *name, const char *url) |
00e2e675 | 1871 | { |
3dd05a85 | 1872 | int ret; |
a4b92340 | 1873 | ssize_t size; |
a4b92340 | 1874 | struct lttng_uri *uris = NULL; |
b178f53e JG |
1875 | struct lttng_session_descriptor *descriptor = NULL; |
1876 | enum lttng_error_code ret_code; | |
00e2e675 | 1877 | |
b178f53e JG |
1878 | if (!name) { |
1879 | ret = -LTTNG_ERR_INVALID; | |
1880 | goto end; | |
00e2e675 DG |
1881 | } |
1882 | ||
bc894455 | 1883 | size = uri_parse_str_urls(url, NULL, &uris); |
a4b92340 | 1884 | if (size < 0) { |
b178f53e JG |
1885 | ret = -LTTNG_ERR_INVALID; |
1886 | goto end; | |
1887 | } | |
1888 | switch (size) { | |
1889 | case 0: | |
1890 | descriptor = lttng_session_descriptor_create(name); | |
1891 | break; | |
1892 | case 1: | |
1893 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1894 | ret = -LTTNG_ERR_INVALID; | |
1895 | goto end; | |
1896 | } | |
1897 | descriptor = lttng_session_descriptor_local_create(name, | |
1898 | uris[0].dst.path); | |
1899 | break; | |
1900 | case 2: | |
1901 | descriptor = lttng_session_descriptor_network_create(name, url, | |
1902 | NULL); | |
1903 | break; | |
1904 | default: | |
1905 | ret = -LTTNG_ERR_INVALID; | |
1906 | goto end; | |
1907 | } | |
1908 | if (!descriptor) { | |
1909 | ret = -LTTNG_ERR_INVALID; | |
1910 | goto end; | |
00e2e675 | 1911 | } |
b178f53e JG |
1912 | ret_code = lttng_create_session_ext(descriptor); |
1913 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1914 | end: | |
1915 | lttng_session_descriptor_destroy(descriptor); | |
1916 | free(uris); | |
1917 | return ret; | |
1918 | } | |
00e2e675 | 1919 | |
b178f53e JG |
1920 | /* |
1921 | * Create a session exclusively used for snapshot. | |
1922 | * | |
780d4bb8 | 1923 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
1924 | */ |
1925 | int lttng_create_session_snapshot(const char *name, const char *snapshot_url) | |
1926 | { | |
1927 | int ret; | |
1928 | enum lttng_error_code ret_code; | |
1929 | ssize_t size; | |
1930 | struct lttng_uri *uris = NULL; | |
1931 | struct lttng_session_descriptor *descriptor = NULL; | |
a4b92340 | 1932 | |
b178f53e JG |
1933 | if (!name) { |
1934 | ret = -LTTNG_ERR_INVALID; | |
1935 | goto end; | |
1936 | } | |
1937 | ||
1938 | size = uri_parse_str_urls(snapshot_url, NULL, &uris); | |
1939 | if (size < 0) { | |
1940 | ret = -LTTNG_ERR_INVALID; | |
1941 | goto end; | |
1942 | } | |
1943 | /* | |
1944 | * If the user does not specify a custom subdir, use the session name. | |
1945 | */ | |
1946 | if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && | |
1947 | strlen(uris[0].subdir) == 0) { | |
1948 | ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", | |
1949 | name); | |
1950 | if (ret < 0) { | |
1951 | PERROR("Failed to set session name as network destination sub-directory"); | |
1952 | ret = -LTTNG_ERR_FATAL; | |
1953 | goto end; | |
1954 | } else if (ret >= sizeof(uris[0].subdir)) { | |
1955 | /* Truncated output. */ | |
1956 | ret = -LTTNG_ERR_INVALID; | |
1957 | goto end; | |
1958 | } | |
1959 | } | |
3dd05a85 | 1960 | |
b178f53e JG |
1961 | switch (size) { |
1962 | case 0: | |
1963 | descriptor = lttng_session_descriptor_snapshot_create(name); | |
1964 | break; | |
1965 | case 1: | |
1966 | if (uris[0].dtype != LTTNG_DST_PATH) { | |
1967 | ret = -LTTNG_ERR_INVALID; | |
1968 | goto end; | |
1969 | } | |
1970 | descriptor = lttng_session_descriptor_snapshot_local_create( | |
1971 | name, | |
1972 | uris[0].dst.path); | |
1973 | break; | |
1974 | case 2: | |
1975 | descriptor = lttng_session_descriptor_snapshot_network_create( | |
1976 | name, | |
1977 | snapshot_url, | |
1978 | NULL); | |
1979 | break; | |
1980 | default: | |
1981 | ret = -LTTNG_ERR_INVALID; | |
1982 | goto end; | |
1983 | } | |
1984 | if (!descriptor) { | |
1985 | ret = -LTTNG_ERR_INVALID; | |
1986 | goto end; | |
1987 | } | |
1988 | ret_code = lttng_create_session_ext(descriptor); | |
1989 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
1990 | end: | |
1991 | lttng_session_descriptor_destroy(descriptor); | |
3dd05a85 DG |
1992 | free(uris); |
1993 | return ret; | |
00e2e675 DG |
1994 | } |
1995 | ||
b178f53e JG |
1996 | /* |
1997 | * Create a session exclusively used for live. | |
1998 | * | |
780d4bb8 | 1999 | * Return 0 on success else a negative LTTng error code. |
b178f53e JG |
2000 | */ |
2001 | int lttng_create_session_live(const char *name, const char *url, | |
2002 | unsigned int timer_interval) | |
2003 | { | |
2004 | int ret; | |
2005 | enum lttng_error_code ret_code; | |
2006 | struct lttng_session_descriptor *descriptor = NULL; | |
2007 | ||
2008 | if (!name) { | |
2009 | ret = -LTTNG_ERR_INVALID; | |
2010 | goto end; | |
2011 | } | |
2012 | ||
2013 | if (url) { | |
2014 | descriptor = lttng_session_descriptor_live_network_create( | |
2015 | name, url, NULL, timer_interval); | |
2016 | } else { | |
2017 | descriptor = lttng_session_descriptor_live_create( | |
2018 | name, timer_interval); | |
2019 | } | |
2020 | if (!descriptor) { | |
2021 | ret = -LTTNG_ERR_INVALID; | |
2022 | goto end; | |
2023 | } | |
2024 | ret_code = lttng_create_session_ext(descriptor); | |
2025 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; | |
2026 | end: | |
2027 | lttng_session_descriptor_destroy(descriptor); | |
2028 | return ret; | |
2029 | } | |
2030 | ||
e20ee7c2 JD |
2031 | /* |
2032 | * Stop the session and wait for the data before destroying it | |
780d4bb8 MD |
2033 | * |
2034 | * Return 0 on success else a negative LTTng error code. | |
e20ee7c2 JD |
2035 | */ |
2036 | int lttng_destroy_session(const char *session_name) | |
2037 | { | |
2038 | int ret; | |
3e3665b8 JG |
2039 | enum lttng_error_code ret_code; |
2040 | enum lttng_destruction_handle_status status; | |
2041 | struct lttng_destruction_handle *handle = NULL; | |
e20ee7c2 JD |
2042 | |
2043 | /* | |
3e3665b8 JG |
2044 | * Stop the tracing and wait for the data to be |
2045 | * consumed. | |
e20ee7c2 JD |
2046 | */ |
2047 | ret = _lttng_stop_tracing(session_name, 1); | |
2048 | if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
2049 | goto end; | |
2050 | } | |
2051 | ||
3e3665b8 JG |
2052 | ret_code = lttng_destroy_session_ext(session_name, &handle); |
2053 | if (ret_code != LTTNG_OK) { | |
2054 | ret = (int) -ret_code; | |
2055 | goto end; | |
2056 | } | |
2057 | assert(handle); | |
2058 | ||
2059 | /* Block until the completion of the destruction of the session. */ | |
2060 | status = lttng_destruction_handle_wait_for_completion(handle, -1); | |
2061 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED) { | |
2062 | ret = -LTTNG_ERR_UNK; | |
2063 | goto end; | |
2064 | } | |
2065 | ||
2066 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
2067 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
2068 | ret = -LTTNG_ERR_UNK; | |
2069 | goto end; | |
2070 | } | |
780d4bb8 | 2071 | ret = ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 | 2072 | end: |
3e3665b8 | 2073 | lttng_destruction_handle_destroy(handle); |
e20ee7c2 JD |
2074 | return ret; |
2075 | } | |
2076 | ||
2077 | /* | |
2078 | * Destroy the session without waiting for the data. | |
2079 | */ | |
2080 | int lttng_destroy_session_no_wait(const char *session_name) | |
2081 | { | |
3e3665b8 | 2082 | enum lttng_error_code ret_code; |
e20ee7c2 | 2083 | |
3e3665b8 | 2084 | ret_code = lttng_destroy_session_ext(session_name, NULL); |
548ce42c | 2085 | return ret_code == LTTNG_OK ? 0 : -ret_code; |
e20ee7c2 JD |
2086 | } |
2087 | ||
57167058 | 2088 | /* |
9ae110e2 JG |
2089 | * Ask the session daemon for all available sessions. |
2090 | * Sets the contents of the sessions array. | |
2091 | * Returns the number of lttng_session entries in sessions; | |
2092 | * on error, returns a negative value. | |
57167058 | 2093 | */ |
b178f53e | 2094 | int lttng_list_sessions(struct lttng_session **out_sessions) |
57167058 | 2095 | { |
ca95a216 | 2096 | int ret; |
cd80958d | 2097 | struct lttcomm_session_msg lsm; |
b178f53e JG |
2098 | const size_t session_size = sizeof(struct lttng_session) + |
2099 | sizeof(struct lttng_session_extended); | |
2100 | size_t session_count, i; | |
2101 | struct lttng_session_extended *sessions_extended_begin; | |
2102 | struct lttng_session *sessions = NULL; | |
57167058 | 2103 | |
53efb85a | 2104 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2105 | lsm.cmd_type = LTTNG_LIST_SESSIONS; |
21c5a233 MD |
2106 | /* |
2107 | * Initialize out_sessions to NULL so it is initialized when | |
2108 | * lttng_list_sessions returns 0, thus allowing *out_sessions to | |
2109 | * be subsequently freed. | |
2110 | */ | |
2111 | *out_sessions = NULL; | |
b178f53e JG |
2112 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) &sessions); |
2113 | if (ret <= 0) { | |
b178f53e JG |
2114 | goto end; |
2115 | } | |
2116 | if (!sessions) { | |
2117 | ret = -LTTNG_ERR_FATAL; | |
2118 | goto end; | |
2119 | } | |
2120 | ||
2121 | if (ret % session_size) { | |
2122 | ret = -LTTNG_ERR_UNK; | |
2123 | free(sessions); | |
b178f53e | 2124 | goto end; |
57167058 | 2125 | } |
b178f53e JG |
2126 | session_count = (size_t) ret / session_size; |
2127 | sessions_extended_begin = (struct lttng_session_extended *) | |
2128 | (&sessions[session_count]); | |
57167058 | 2129 | |
b178f53e JG |
2130 | /* Set extended session info pointers. */ |
2131 | for (i = 0; i < session_count; i++) { | |
2132 | struct lttng_session *session = &sessions[i]; | |
2133 | struct lttng_session_extended *extended = | |
2134 | &(sessions_extended_begin[i]); | |
2135 | ||
2136 | session->extended.ptr = extended; | |
2137 | } | |
2138 | ||
2139 | ret = (int) session_count; | |
2140 | *out_sessions = sessions; | |
2141 | end: | |
2142 | return ret; | |
2143 | } | |
2144 | ||
2145 | enum lttng_error_code lttng_session_get_creation_time( | |
2146 | const struct lttng_session *session, uint64_t *creation_time) | |
2147 | { | |
2148 | enum lttng_error_code ret = LTTNG_OK; | |
2149 | struct lttng_session_extended *extended; | |
2150 | ||
2151 | if (!session || !creation_time || !session->extended.ptr) { | |
2152 | ret = LTTNG_ERR_INVALID; | |
2153 | goto end; | |
2154 | } | |
2155 | ||
2156 | extended = session->extended.ptr; | |
2157 | if (!extended->creation_time.is_set) { | |
2158 | /* Not created on the session daemon yet. */ | |
2159 | ret = LTTNG_ERR_SESSION_NOT_EXIST; | |
2160 | goto end; | |
2161 | } | |
2162 | *creation_time = extended->creation_time.value; | |
2163 | end: | |
2164 | return ret; | |
57167058 DG |
2165 | } |
2166 | ||
d7ba1388 MD |
2167 | int lttng_set_session_shm_path(const char *session_name, |
2168 | const char *shm_path) | |
2169 | { | |
1da0efb1 | 2170 | int ret; |
d7ba1388 MD |
2171 | struct lttcomm_session_msg lsm; |
2172 | ||
2173 | if (session_name == NULL) { | |
2174 | return -LTTNG_ERR_INVALID; | |
2175 | } | |
2176 | ||
2177 | memset(&lsm, 0, sizeof(lsm)); | |
2178 | lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; | |
2179 | ||
1da0efb1 | 2180 | ret = lttng_strncpy(lsm.session.name, session_name, |
d7ba1388 | 2181 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2182 | if (ret) { |
2183 | ret = -LTTNG_ERR_INVALID; | |
2184 | goto end; | |
2185 | } | |
2186 | ||
2187 | ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", | |
d7ba1388 | 2188 | sizeof(lsm.u.set_shm_path.shm_path)); |
1da0efb1 JG |
2189 | if (ret) { |
2190 | ret = -LTTNG_ERR_INVALID; | |
2191 | goto end; | |
2192 | } | |
d7ba1388 | 2193 | |
1da0efb1 JG |
2194 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); |
2195 | end: | |
2196 | return ret; | |
d7ba1388 MD |
2197 | } |
2198 | ||
9f19cc17 | 2199 | /* |
9ae110e2 JG |
2200 | * Ask the session daemon for all available domains of a session. |
2201 | * Sets the contents of the domains array. | |
2202 | * Returns the number of lttng_domain entries in domains; | |
2203 | * on error, returns a negative value. | |
9f19cc17 | 2204 | */ |
330be774 | 2205 | int lttng_list_domains(const char *session_name, |
cd80958d | 2206 | struct lttng_domain **domains) |
9f19cc17 DG |
2207 | { |
2208 | int ret; | |
cd80958d DG |
2209 | struct lttcomm_session_msg lsm; |
2210 | ||
330be774 | 2211 | if (session_name == NULL) { |
1da0efb1 JG |
2212 | ret = -LTTNG_ERR_INVALID; |
2213 | goto error; | |
cd80958d | 2214 | } |
9f19cc17 | 2215 | |
53efb85a | 2216 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d DG |
2217 | lsm.cmd_type = LTTNG_LIST_DOMAINS; |
2218 | ||
1da0efb1 | 2219 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2220 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2221 | if (ret) { |
2222 | ret = -LTTNG_ERR_INVALID; | |
2223 | goto error; | |
2224 | } | |
cd80958d | 2225 | |
cac3069d | 2226 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); |
9f19cc17 | 2227 | if (ret < 0) { |
1da0efb1 | 2228 | goto error; |
9f19cc17 DG |
2229 | } |
2230 | ||
2231 | return ret / sizeof(struct lttng_domain); | |
1da0efb1 JG |
2232 | error: |
2233 | return ret; | |
9f19cc17 DG |
2234 | } |
2235 | ||
2236 | /* | |
9ae110e2 JG |
2237 | * Ask the session daemon for all available channels of a session. |
2238 | * Sets the contents of the channels array. | |
2239 | * Returns the number of lttng_channel entries in channels; | |
2240 | * on error, returns a negative value. | |
9f19cc17 | 2241 | */ |
cd80958d DG |
2242 | int lttng_list_channels(struct lttng_handle *handle, |
2243 | struct lttng_channel **channels) | |
9f19cc17 DG |
2244 | { |
2245 | int ret; | |
53e367f9 JG |
2246 | size_t channel_count, i; |
2247 | const size_t channel_size = sizeof(struct lttng_channel) + | |
cf0bcb51 | 2248 | sizeof(struct lttng_channel_extended); |
cd80958d | 2249 | struct lttcomm_session_msg lsm; |
53e367f9 | 2250 | void *extended_at; |
cd80958d | 2251 | |
9d697d3d | 2252 | if (handle == NULL) { |
53e367f9 JG |
2253 | ret = -LTTNG_ERR_INVALID; |
2254 | goto end; | |
cd80958d DG |
2255 | } |
2256 | ||
53efb85a | 2257 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2258 | lsm.cmd_type = LTTNG_LIST_CHANNELS; |
1da0efb1 | 2259 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2260 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2261 | if (ret) { |
2262 | ret = -LTTNG_ERR_INVALID; | |
2263 | goto end; | |
2264 | } | |
9f19cc17 | 2265 | |
60160d2a | 2266 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2267 | |
cac3069d | 2268 | ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels); |
9f19cc17 | 2269 | if (ret < 0) { |
53e367f9 JG |
2270 | goto end; |
2271 | } | |
2272 | ||
2273 | if (ret % channel_size) { | |
2274 | ret = -LTTNG_ERR_UNK; | |
2275 | free(*channels); | |
2276 | *channels = NULL; | |
2277 | goto end; | |
9f19cc17 | 2278 | } |
53e367f9 | 2279 | channel_count = (size_t) ret / channel_size; |
9f19cc17 | 2280 | |
53e367f9 JG |
2281 | /* Set extended info pointers */ |
2282 | extended_at = ((void *) *channels) + | |
2283 | channel_count * sizeof(struct lttng_channel); | |
2284 | for (i = 0; i < channel_count; i++) { | |
2285 | struct lttng_channel *chan = &(*channels)[i]; | |
2286 | ||
2287 | chan->attr.extended.ptr = extended_at; | |
cf0bcb51 | 2288 | extended_at += sizeof(struct lttng_channel_extended); |
53e367f9 JG |
2289 | } |
2290 | ||
2291 | ret = (int) channel_count; | |
2292 | end: | |
2293 | return ret; | |
9f19cc17 DG |
2294 | } |
2295 | ||
2296 | /* | |
9ae110e2 JG |
2297 | * Ask the session daemon for all available events of a session channel. |
2298 | * Sets the contents of the events array. | |
2299 | * Returns the number of lttng_event entries in events; | |
2300 | * on error, returns a negative value. | |
9f19cc17 | 2301 | */ |
cd80958d DG |
2302 | int lttng_list_events(struct lttng_handle *handle, |
2303 | const char *channel_name, struct lttng_event **events) | |
9f19cc17 DG |
2304 | { |
2305 | int ret; | |
cd80958d | 2306 | struct lttcomm_session_msg lsm; |
b4e3ceb9 PP |
2307 | struct lttcomm_event_command_header *cmd_header = NULL; |
2308 | size_t cmd_header_len; | |
2309 | uint32_t nb_events, i; | |
de453daa | 2310 | void *comm_ext_at; |
de453daa | 2311 | char *reception_buffer = NULL; |
56f0bc67 | 2312 | struct lttng_dynamic_buffer listing; |
de453daa | 2313 | size_t storage_req; |
9f19cc17 | 2314 | |
9d697d3d DG |
2315 | /* Safety check. An handle and channel name are mandatory */ |
2316 | if (handle == NULL || channel_name == NULL) { | |
2f70b271 | 2317 | return -LTTNG_ERR_INVALID; |
cd80958d DG |
2318 | } |
2319 | ||
53efb85a | 2320 | memset(&lsm, 0, sizeof(lsm)); |
cd80958d | 2321 | lsm.cmd_type = LTTNG_LIST_EVENTS; |
1da0efb1 | 2322 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
cd80958d | 2323 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2324 | if (ret) { |
2325 | ret = -LTTNG_ERR_INVALID; | |
2326 | goto end; | |
2327 | } | |
2328 | ||
2329 | ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, | |
cd80958d | 2330 | sizeof(lsm.u.list.channel_name)); |
1da0efb1 JG |
2331 | if (ret) { |
2332 | ret = -LTTNG_ERR_INVALID; | |
2333 | goto end; | |
2334 | } | |
2335 | ||
60160d2a | 2336 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
9f19cc17 | 2337 | |
a04d53fc | 2338 | ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0, |
de453daa JG |
2339 | (void **) &reception_buffer, (void **) &cmd_header, |
2340 | &cmd_header_len); | |
9f19cc17 | 2341 | if (ret < 0) { |
de453daa | 2342 | goto end; |
9f19cc17 DG |
2343 | } |
2344 | ||
d9f484bc JG |
2345 | if (!cmd_header) { |
2346 | ret = -LTTNG_ERR_UNK; | |
2347 | goto end; | |
2348 | } | |
2349 | ||
b4e3ceb9 PP |
2350 | /* Set number of events and free command header */ |
2351 | nb_events = cmd_header->nb_events; | |
2352 | if (nb_events > INT_MAX) { | |
55c9e7ca | 2353 | ret = -LTTNG_ERR_OVERFLOW; |
de453daa | 2354 | goto end; |
b4e3ceb9 | 2355 | } |
b4e3ceb9 PP |
2356 | free(cmd_header); |
2357 | cmd_header = NULL; | |
2358 | ||
de453daa JG |
2359 | /* |
2360 | * The buffer that is returned must contain a "flat" version of | |
2361 | * the events that are returned. In other words, all pointers | |
2362 | * within an lttng_event must point to a location within the returned | |
56f0bc67 JG |
2363 | * buffer so that the user may free everything by simply calling free() |
2364 | * on the returned buffer. This is needed in order to maintain API | |
de453daa JG |
2365 | * compatibility. |
2366 | * | |
56f0bc67 JG |
2367 | * A first pass is performed to compute the size of the buffer that |
2368 | * must be allocated. A second pass is then performed to setup | |
de453daa JG |
2369 | * the returned events so that their members always point within the |
2370 | * buffer. | |
2371 | * | |
2372 | * The layout of the returned buffer is as follows: | |
2373 | * - struct lttng_event[nb_events], | |
2374 | * - nb_events times the following: | |
2375 | * - struct lttng_event_extended, | |
2376 | * - flattened version of userspace_probe_location | |
2377 | * - filter_expression | |
2378 | * - exclusions | |
2379 | * - padding to align to 64-bits | |
2380 | */ | |
2381 | comm_ext_at = reception_buffer + | |
2382 | (nb_events * sizeof(struct lttng_event)); | |
2383 | storage_req = nb_events * sizeof(struct lttng_event); | |
b4e3ceb9 PP |
2384 | |
2385 | for (i = 0; i < nb_events; i++) { | |
de453daa JG |
2386 | struct lttcomm_event_extended_header *ext_comm = |
2387 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
56f0bc67 | 2388 | int probe_storage_req = 0; |
b4e3ceb9 | 2389 | |
de453daa JG |
2390 | comm_ext_at += sizeof(*ext_comm); |
2391 | comm_ext_at += ext_comm->filter_len; | |
2392 | comm_ext_at += | |
2393 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2394 | ||
56f0bc67 JG |
2395 | if (ext_comm->userspace_probe_location_len) { |
2396 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2397 | struct lttng_buffer_view probe_location_view; | |
2398 | ||
2399 | probe_location_view = lttng_buffer_view_init( | |
2400 | comm_ext_at, 0, | |
2401 | ext_comm->userspace_probe_location_len); | |
2402 | ||
2403 | /* | |
2404 | * Create a temporary userspace probe location to | |
2405 | * determine the size needed by a "flattened" version | |
2406 | * of that same probe location. | |
2407 | */ | |
2408 | ret = lttng_userspace_probe_location_create_from_buffer( | |
2409 | &probe_location_view, &probe_location); | |
2410 | if (ret < 0) { | |
2411 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2412 | goto end; | |
2413 | } | |
2414 | ||
2415 | ret = lttng_userspace_probe_location_flatten( | |
2416 | probe_location, NULL); | |
2417 | lttng_userspace_probe_location_destroy(probe_location); | |
2418 | if (ret < 0) { | |
2419 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2420 | goto end; | |
2421 | } | |
2422 | ||
2423 | probe_storage_req = ret; | |
2424 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
56f0bc67 JG |
2425 | } |
2426 | ||
de453daa | 2427 | storage_req += sizeof(struct lttng_event_extended); |
de453daa JG |
2428 | storage_req += ext_comm->filter_len; |
2429 | storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
56f0bc67 JG |
2430 | /* Padding to ensure the flat probe is aligned. */ |
2431 | storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); | |
2432 | storage_req += probe_storage_req; | |
b4e3ceb9 PP |
2433 | } |
2434 | ||
56f0bc67 JG |
2435 | lttng_dynamic_buffer_init(&listing); |
2436 | /* | |
2437 | * We must ensure that "listing" is never resized so as to preserve | |
2438 | * the validity of the flattened objects. | |
2439 | */ | |
2440 | ret = lttng_dynamic_buffer_set_capacity(&listing, storage_req); | |
2441 | if (ret) { | |
2442 | ret = -LTTNG_ERR_NOMEM; | |
de453daa JG |
2443 | goto end; |
2444 | } | |
56f0bc67 JG |
2445 | |
2446 | ret = lttng_dynamic_buffer_append(&listing, reception_buffer, | |
2447 | nb_events * sizeof(struct lttng_event)); | |
2448 | if (ret) { | |
2449 | ret = -LTTNG_ERR_NOMEM; | |
2450 | goto free_dynamic_buffer; | |
2451 | } | |
de453daa JG |
2452 | |
2453 | comm_ext_at = reception_buffer + | |
56f0bc67 | 2454 | (nb_events * sizeof(struct lttng_event)); |
de453daa JG |
2455 | for (i = 0; i < nb_events; i++) { |
2456 | struct lttng_event *event = (struct lttng_event *) | |
56f0bc67 | 2457 | (listing.data + (sizeof(struct lttng_event) * i)); |
de453daa JG |
2458 | struct lttcomm_event_extended_header *ext_comm = |
2459 | (struct lttcomm_event_extended_header *) comm_ext_at; | |
2460 | struct lttng_event_extended *event_extended = | |
56f0bc67 JG |
2461 | (struct lttng_event_extended *) |
2462 | (listing.data + listing.size); | |
de453daa | 2463 | |
56f0bc67 JG |
2464 | /* Insert struct lttng_event_extended. */ |
2465 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2466 | listing.size + sizeof(*event_extended)); | |
2467 | if (ret) { | |
2468 | ret = -LTTNG_ERR_NOMEM; | |
2469 | goto free_dynamic_buffer; | |
2470 | } | |
de453daa | 2471 | event->extended.ptr = event_extended; |
56f0bc67 | 2472 | |
de453daa JG |
2473 | comm_ext_at += sizeof(*ext_comm); |
2474 | ||
56f0bc67 JG |
2475 | /* Insert filter expression. */ |
2476 | if (ext_comm->filter_len) { | |
2477 | event_extended->filter_expression = listing.data + | |
2478 | listing.size; | |
2479 | ret = lttng_dynamic_buffer_append(&listing, comm_ext_at, | |
2480 | ext_comm->filter_len); | |
2481 | if (ret) { | |
2482 | ret = -LTTNG_ERR_NOMEM; | |
2483 | goto free_dynamic_buffer; | |
2484 | } | |
2485 | comm_ext_at += ext_comm->filter_len; | |
2486 | } | |
2487 | ||
2488 | /* Insert exclusions. */ | |
2489 | if (ext_comm->nb_exclusions) { | |
2490 | event_extended->exclusions.count = | |
2491 | ext_comm->nb_exclusions; | |
2492 | event_extended->exclusions.strings = | |
2493 | listing.data + listing.size; | |
2494 | ||
2495 | ret = lttng_dynamic_buffer_append(&listing, | |
2496 | comm_ext_at, | |
2497 | ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN); | |
2498 | if (ret) { | |
2499 | ret = -LTTNG_ERR_NOMEM; | |
5e4f4898 | 2500 | goto free_dynamic_buffer; |
56f0bc67 JG |
2501 | } |
2502 | comm_ext_at += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
2503 | } | |
2504 | ||
2505 | /* Insert padding to align to 64-bits. */ | |
2506 | ret = lttng_dynamic_buffer_set_size(&listing, | |
2507 | ALIGN_TO(listing.size, sizeof(uint64_t))); | |
2508 | if (ret) { | |
2509 | ret = -LTTNG_ERR_NOMEM; | |
2510 | goto free_dynamic_buffer; | |
2511 | } | |
2512 | ||
2513 | /* Insert flattened userspace probe location. */ | |
2514 | if (ext_comm->userspace_probe_location_len) { | |
2515 | struct lttng_userspace_probe_location *probe_location = NULL; | |
2516 | struct lttng_buffer_view probe_location_view; | |
de453daa | 2517 | |
56f0bc67 JG |
2518 | probe_location_view = lttng_buffer_view_init( |
2519 | comm_ext_at, 0, | |
2520 | ext_comm->userspace_probe_location_len); | |
de453daa | 2521 | |
56f0bc67 JG |
2522 | ret = lttng_userspace_probe_location_create_from_buffer( |
2523 | &probe_location_view, &probe_location); | |
2524 | if (ret < 0) { | |
2525 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2526 | goto free_dynamic_buffer; | |
2527 | } | |
2528 | ||
2529 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
2530 | (listing.data + listing.size); | |
2531 | ret = lttng_userspace_probe_location_flatten( | |
2532 | probe_location, &listing); | |
2533 | lttng_userspace_probe_location_destroy(probe_location); | |
2534 | if (ret < 0) { | |
2535 | ret = -LTTNG_ERR_PROBE_LOCATION_INVAL; | |
2536 | goto free_dynamic_buffer; | |
2537 | } | |
2538 | ||
2539 | comm_ext_at += ext_comm->userspace_probe_location_len; | |
2540 | } | |
de453daa JG |
2541 | } |
2542 | ||
56f0bc67 JG |
2543 | /* Don't reset listing buffer as we return its content. */ |
2544 | *events = (struct lttng_event *) listing.data; | |
2545 | lttng_dynamic_buffer_init(&listing); | |
de453daa | 2546 | ret = (int) nb_events; |
56f0bc67 JG |
2547 | free_dynamic_buffer: |
2548 | lttng_dynamic_buffer_reset(&listing); | |
de453daa | 2549 | end: |
b4e3ceb9 | 2550 | free(cmd_header); |
de453daa | 2551 | free(reception_buffer); |
b4e3ceb9 | 2552 | return ret; |
9f19cc17 DG |
2553 | } |
2554 | ||
fac6795d | 2555 | /* |
1c8d13c8 TD |
2556 | * Sets the tracing_group variable with name. |
2557 | * This function allocates memory pointed to by tracing_group. | |
2558 | * On success, returns 0, on error, returns -1 (null name) or -ENOMEM. | |
fac6795d DG |
2559 | */ |
2560 | int lttng_set_tracing_group(const char *name) | |
2561 | { | |
fef43092 | 2562 | char *new_group; |
9d697d3d | 2563 | if (name == NULL) { |
2f70b271 | 2564 | return -LTTNG_ERR_INVALID; |
9d697d3d DG |
2565 | } |
2566 | ||
fef43092 | 2567 | if (asprintf(&new_group, "%s", name) < 0) { |
2f70b271 | 2568 | return -LTTNG_ERR_FATAL; |
fac6795d DG |
2569 | } |
2570 | ||
fef43092 JR |
2571 | free(tracing_group); |
2572 | tracing_group = new_group; | |
2573 | new_group = NULL; | |
2574 | ||
fac6795d DG |
2575 | return 0; |
2576 | } | |
2577 | ||
cd80958d | 2578 | int lttng_calibrate(struct lttng_handle *handle, |
d0254c7c MD |
2579 | struct lttng_calibrate *calibrate) |
2580 | { | |
b812e5ca PP |
2581 | /* |
2582 | * This command was removed in LTTng 2.9. | |
2583 | */ | |
2584 | return -LTTNG_ERR_UND; | |
d0254c7c MD |
2585 | } |
2586 | ||
5edd7e09 DG |
2587 | /* |
2588 | * Set default channel attributes. | |
441c16a7 | 2589 | * If either or both of the arguments are null, attr content is zeroe'd. |
5edd7e09 DG |
2590 | */ |
2591 | void lttng_channel_set_default_attr(struct lttng_domain *domain, | |
2592 | struct lttng_channel_attr *attr) | |
2593 | { | |
294851b0 | 2594 | struct lttng_channel_extended *extended; |
cf0bcb51 | 2595 | |
5edd7e09 DG |
2596 | /* Safety check */ |
2597 | if (attr == NULL || domain == NULL) { | |
2598 | return; | |
2599 | } | |
2600 | ||
294851b0 | 2601 | extended = (struct lttng_channel_extended *) attr->extended.ptr; |
eacaa7a6 DS |
2602 | memset(attr, 0, sizeof(struct lttng_channel_attr)); |
2603 | ||
0a9c6494 DG |
2604 | /* Same for all domains. */ |
2605 | attr->overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
2606 | attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE; | |
2607 | attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT; | |
2608 | ||
5edd7e09 DG |
2609 | switch (domain->type) { |
2610 | case LTTNG_DOMAIN_KERNEL: | |
9ae110e2 JG |
2611 | attr->switch_timer_interval = |
2612 | DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; | |
d92ff3ef | 2613 | attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; |
3e230f92 | 2614 | attr->subbuf_size = default_get_kernel_channel_subbuf_size(); |
5edd7e09 DG |
2615 | attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM; |
2616 | attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
cf0bcb51 JG |
2617 | if (extended) { |
2618 | extended->monitor_timer_interval = | |
2619 | DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2620 | extended->blocking_timeout = |
2621 | DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2622 | } |
5edd7e09 DG |
2623 | break; |
2624 | case LTTNG_DOMAIN_UST: | |
0a9c6494 DG |
2625 | switch (domain->buf_type) { |
2626 | case LTTNG_BUFFER_PER_UID: | |
2627 | attr->subbuf_size = default_get_ust_uid_channel_subbuf_size(); | |
2628 | attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM; | |
2629 | attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2630 | attr->switch_timer_interval = |
2631 | DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER; | |
2632 | attr->read_timer_interval = | |
2633 | DEFAULT_UST_UID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2634 | if (extended) { |
2635 | extended->monitor_timer_interval = | |
2636 | DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2637 | extended->blocking_timeout = |
2638 | DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2639 | } |
0a9c6494 DG |
2640 | break; |
2641 | case LTTNG_BUFFER_PER_PID: | |
2642 | default: | |
2643 | attr->subbuf_size = default_get_ust_pid_channel_subbuf_size(); | |
2644 | attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM; | |
2645 | attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT; | |
9ae110e2 JG |
2646 | attr->switch_timer_interval = |
2647 | DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER; | |
2648 | attr->read_timer_interval = | |
2649 | DEFAULT_UST_PID_CHANNEL_READ_TIMER; | |
cf0bcb51 JG |
2650 | if (extended) { |
2651 | extended->monitor_timer_interval = | |
2652 | DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER; | |
491d1539 MD |
2653 | extended->blocking_timeout = |
2654 | DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT; | |
cf0bcb51 | 2655 | } |
0a9c6494 DG |
2656 | break; |
2657 | } | |
5edd7e09 | 2658 | default: |
441c16a7 | 2659 | /* Default behavior: leave set to 0. */ |
5edd7e09 DG |
2660 | break; |
2661 | } | |
cf0bcb51 JG |
2662 | |
2663 | attr->extended.ptr = extended; | |
5edd7e09 DG |
2664 | } |
2665 | ||
5ba3702f JG |
2666 | int lttng_channel_get_discarded_event_count(struct lttng_channel *channel, |
2667 | uint64_t *discarded_events) | |
2668 | { | |
2669 | int ret = 0; | |
cf0bcb51 | 2670 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2671 | |
2672 | if (!channel || !discarded_events) { | |
2673 | ret = -LTTNG_ERR_INVALID; | |
2674 | goto end; | |
2675 | } | |
2676 | ||
2677 | chan_ext = channel->attr.extended.ptr; | |
2678 | if (!chan_ext) { | |
2679 | /* | |
2680 | * This can happen since the lttng_channel structure is | |
2681 | * used for other tasks where this pointer is never set. | |
2682 | */ | |
2683 | *discarded_events = 0; | |
2684 | goto end; | |
2685 | } | |
2686 | ||
2687 | *discarded_events = chan_ext->discarded_events; | |
2688 | end: | |
2689 | return ret; | |
2690 | } | |
2691 | ||
2692 | int lttng_channel_get_lost_packet_count(struct lttng_channel *channel, | |
2693 | uint64_t *lost_packets) | |
2694 | { | |
2695 | int ret = 0; | |
cf0bcb51 | 2696 | struct lttng_channel_extended *chan_ext; |
5ba3702f JG |
2697 | |
2698 | if (!channel || !lost_packets) { | |
2699 | ret = -LTTNG_ERR_INVALID; | |
2700 | goto end; | |
2701 | } | |
2702 | ||
2703 | chan_ext = channel->attr.extended.ptr; | |
2704 | if (!chan_ext) { | |
2705 | /* | |
2706 | * This can happen since the lttng_channel structure is | |
2707 | * used for other tasks where this pointer is never set. | |
2708 | */ | |
2709 | *lost_packets = 0; | |
2710 | goto end; | |
2711 | } | |
2712 | ||
2713 | *lost_packets = chan_ext->lost_packets; | |
2714 | end: | |
2715 | return ret; | |
2716 | } | |
2717 | ||
cf0bcb51 JG |
2718 | int lttng_channel_get_monitor_timer_interval(struct lttng_channel *chan, |
2719 | uint64_t *monitor_timer_interval) | |
2720 | { | |
2721 | int ret = 0; | |
2722 | ||
2723 | if (!chan || !monitor_timer_interval) { | |
2724 | ret = -LTTNG_ERR_INVALID; | |
2725 | goto end; | |
2726 | } | |
2727 | ||
2728 | if (!chan->attr.extended.ptr) { | |
2729 | ret = -LTTNG_ERR_INVALID; | |
2730 | goto end; | |
2731 | } | |
2732 | ||
2733 | *monitor_timer_interval = ((struct lttng_channel_extended *) | |
2734 | chan->attr.extended.ptr)->monitor_timer_interval; | |
2735 | end: | |
2736 | return ret; | |
2737 | } | |
2738 | ||
2739 | int lttng_channel_set_monitor_timer_interval(struct lttng_channel *chan, | |
2740 | uint64_t monitor_timer_interval) | |
2741 | { | |
2742 | int ret = 0; | |
2743 | ||
2744 | if (!chan || !chan->attr.extended.ptr) { | |
2745 | ret = -LTTNG_ERR_INVALID; | |
2746 | goto end; | |
2747 | } | |
2748 | ||
2749 | ((struct lttng_channel_extended *) | |
2750 | chan->attr.extended.ptr)->monitor_timer_interval = | |
2751 | monitor_timer_interval; | |
2752 | end: | |
2753 | return ret; | |
2754 | } | |
2755 | ||
491d1539 MD |
2756 | int lttng_channel_get_blocking_timeout(struct lttng_channel *chan, |
2757 | int64_t *blocking_timeout) | |
2758 | { | |
2759 | int ret = 0; | |
2760 | ||
2761 | if (!chan || !blocking_timeout) { | |
2762 | ret = -LTTNG_ERR_INVALID; | |
2763 | goto end; | |
2764 | } | |
2765 | ||
2766 | if (!chan->attr.extended.ptr) { | |
2767 | ret = -LTTNG_ERR_INVALID; | |
2768 | goto end; | |
2769 | } | |
2770 | ||
2771 | *blocking_timeout = ((struct lttng_channel_extended *) | |
2772 | chan->attr.extended.ptr)->blocking_timeout; | |
2773 | end: | |
2774 | return ret; | |
2775 | } | |
2776 | ||
2777 | int lttng_channel_set_blocking_timeout(struct lttng_channel *chan, | |
2778 | int64_t blocking_timeout) | |
2779 | { | |
2780 | int ret = 0; | |
2781 | int64_t msec_timeout; | |
2782 | ||
2783 | if (!chan || !chan->attr.extended.ptr) { | |
2784 | ret = -LTTNG_ERR_INVALID; | |
2785 | goto end; | |
2786 | } | |
2787 | ||
2788 | if (blocking_timeout < 0 && blocking_timeout != -1) { | |
2789 | ret = -LTTNG_ERR_INVALID; | |
2790 | goto end; | |
2791 | } | |
2792 | ||
2793 | /* | |
2794 | * LTTng-ust's use of poll() to implement this timeout mechanism forces | |
2795 | * us to accept a narrower range of values (msecs expressed as a signed | |
2796 | * 32-bit integer). | |
2797 | */ | |
2798 | msec_timeout = blocking_timeout / 1000; | |
2799 | if (msec_timeout != (int32_t) msec_timeout) { | |
2800 | ret = -LTTNG_ERR_INVALID; | |
2801 | goto end; | |
2802 | } | |
2803 | ||
2804 | ((struct lttng_channel_extended *) | |
2805 | chan->attr.extended.ptr)->blocking_timeout = | |
2806 | blocking_timeout; | |
2807 | end: | |
2808 | return ret; | |
2809 | } | |
2810 | ||
fac6795d | 2811 | /* |
2269e89e | 2812 | * Check if session daemon is alive. |
fac6795d | 2813 | * |
2269e89e | 2814 | * Return 1 if alive or 0 if not. |
1c8d13c8 | 2815 | * On error returns a negative value. |
fac6795d | 2816 | */ |
947308c4 | 2817 | int lttng_session_daemon_alive(void) |
fac6795d DG |
2818 | { |
2819 | int ret; | |
2820 | ||
2821 | ret = set_session_daemon_path(); | |
2822 | if (ret < 0) { | |
9ae110e2 | 2823 | /* Error. */ |
fac6795d DG |
2824 | return ret; |
2825 | } | |
2826 | ||
9d035200 | 2827 | if (*sessiond_sock_path == '\0') { |
2f70b271 | 2828 | /* |
9ae110e2 JG |
2829 | * No socket path set. Weird error which means the constructor |
2830 | * was not called. | |
2f70b271 DG |
2831 | */ |
2832 | assert(0); | |
fac6795d DG |
2833 | } |
2834 | ||
2269e89e | 2835 | ret = try_connect_sessiond(sessiond_sock_path); |
7d8234d9 | 2836 | if (ret < 0) { |
9ae110e2 | 2837 | /* Not alive. */ |
7d8234d9 MD |
2838 | return 0; |
2839 | } | |
7d8234d9 | 2840 | |
9ae110e2 | 2841 | /* Is alive. */ |
947308c4 | 2842 | return 1; |
fac6795d DG |
2843 | } |
2844 | ||
00e2e675 | 2845 | /* |
a4b92340 | 2846 | * Set URL for a consumer for a session and domain. |
00e2e675 DG |
2847 | * |
2848 | * Return 0 on success, else a negative value. | |
2849 | */ | |
a4b92340 DG |
2850 | int lttng_set_consumer_url(struct lttng_handle *handle, |
2851 | const char *control_url, const char *data_url) | |
00e2e675 | 2852 | { |
3dd05a85 | 2853 | int ret; |
a4b92340 | 2854 | ssize_t size; |
00e2e675 | 2855 | struct lttcomm_session_msg lsm; |
a4b92340 | 2856 | struct lttng_uri *uris = NULL; |
00e2e675 | 2857 | |
a4b92340 | 2858 | if (handle == NULL || (control_url == NULL && data_url == NULL)) { |
1da0efb1 JG |
2859 | ret = -LTTNG_ERR_INVALID; |
2860 | goto error; | |
00e2e675 DG |
2861 | } |
2862 | ||
a4b92340 DG |
2863 | memset(&lsm, 0, sizeof(lsm)); |
2864 | ||
00e2e675 DG |
2865 | lsm.cmd_type = LTTNG_SET_CONSUMER_URI; |
2866 | ||
1da0efb1 | 2867 | ret = lttng_strncpy(lsm.session.name, handle->session_name, |
00e2e675 | 2868 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2869 | if (ret) { |
2870 | ret = -LTTNG_ERR_INVALID; | |
2871 | goto error; | |
2872 | } | |
2873 | ||
60160d2a | 2874 | COPY_DOMAIN_PACKED(lsm.domain, handle->domain); |
00e2e675 | 2875 | |
bc894455 | 2876 | size = uri_parse_str_urls(control_url, data_url, &uris); |
a4b92340 | 2877 | if (size < 0) { |
1da0efb1 JG |
2878 | ret = -LTTNG_ERR_INVALID; |
2879 | goto error; | |
a4b92340 DG |
2880 | } |
2881 | ||
2882 | lsm.u.uri.size = size; | |
00e2e675 | 2883 | |
795a978d | 2884 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris, |
cac3069d | 2885 | sizeof(struct lttng_uri) * size, NULL); |
3dd05a85 DG |
2886 | |
2887 | free(uris); | |
1da0efb1 | 2888 | error: |
3dd05a85 | 2889 | return ret; |
00e2e675 DG |
2890 | } |
2891 | ||
2892 | /* | |
9c6bda17 | 2893 | * [OBSOLETE] |
00e2e675 | 2894 | */ |
2ec40111 | 2895 | int lttng_enable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2896 | int lttng_enable_consumer(struct lttng_handle *handle) |
2897 | { | |
785d2d0d | 2898 | return -ENOSYS; |
00e2e675 DG |
2899 | } |
2900 | ||
2901 | /* | |
9c6bda17 | 2902 | * [OBSOLETE] |
00e2e675 | 2903 | */ |
2ec40111 | 2904 | int lttng_disable_consumer(struct lttng_handle *handle); |
00e2e675 DG |
2905 | int lttng_disable_consumer(struct lttng_handle *handle) |
2906 | { | |
785d2d0d | 2907 | return -ENOSYS; |
00e2e675 DG |
2908 | } |
2909 | ||
07424f16 | 2910 | /* |
b178f53e | 2911 | * [OBSOLETE] |
07424f16 | 2912 | */ |
2ec40111 SM |
2913 | int _lttng_create_session_ext(const char *name, const char *url, |
2914 | const char *datetime); | |
07424f16 DG |
2915 | int _lttng_create_session_ext(const char *name, const char *url, |
2916 | const char *datetime) | |
2917 | { | |
b178f53e | 2918 | return -ENOSYS; |
07424f16 DG |
2919 | } |
2920 | ||
806e2684 DG |
2921 | /* |
2922 | * For a given session name, this call checks if the data is ready to be read | |
2923 | * or is still being extracted by the consumer(s) hence not ready to be used by | |
2924 | * any readers. | |
2925 | */ | |
6d805429 | 2926 | int lttng_data_pending(const char *session_name) |
806e2684 DG |
2927 | { |
2928 | int ret; | |
2929 | struct lttcomm_session_msg lsm; | |
f6151c55 | 2930 | uint8_t *pending = NULL; |
806e2684 DG |
2931 | |
2932 | if (session_name == NULL) { | |
2933 | return -LTTNG_ERR_INVALID; | |
2934 | } | |
2935 | ||
53efb85a | 2936 | memset(&lsm, 0, sizeof(lsm)); |
6d805429 | 2937 | lsm.cmd_type = LTTNG_DATA_PENDING; |
806e2684 | 2938 | |
1da0efb1 | 2939 | ret = lttng_strncpy(lsm.session.name, session_name, |
cac3069d | 2940 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2941 | if (ret) { |
2942 | ret = -LTTNG_ERR_INVALID; | |
2943 | goto end; | |
2944 | } | |
806e2684 | 2945 | |
f6151c55 JG |
2946 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); |
2947 | if (ret < 0) { | |
2948 | goto end; | |
2949 | } else if (ret != 1) { | |
2950 | /* Unexpected payload size */ | |
2951 | ret = -LTTNG_ERR_INVALID; | |
2952 | goto end; | |
e848d36d JG |
2953 | } else if (!pending) { |
2954 | /* Internal error. */ | |
2955 | ret = -LTTNG_ERR_UNK; | |
2956 | goto end; | |
806e2684 DG |
2957 | } |
2958 | ||
f6151c55 JG |
2959 | ret = (int) *pending; |
2960 | end: | |
2961 | free(pending); | |
806e2684 DG |
2962 | return ret; |
2963 | } | |
2964 | ||
93ec662e JD |
2965 | /* |
2966 | * Regenerate the metadata for a session. | |
2967 | * Return 0 on success, a negative error code on error. | |
2968 | */ | |
eded6438 | 2969 | int lttng_regenerate_metadata(const char *session_name) |
93ec662e JD |
2970 | { |
2971 | int ret; | |
2972 | struct lttcomm_session_msg lsm; | |
2973 | ||
2974 | if (!session_name) { | |
2975 | ret = -LTTNG_ERR_INVALID; | |
2976 | goto end; | |
2977 | } | |
2978 | ||
2979 | memset(&lsm, 0, sizeof(lsm)); | |
eded6438 | 2980 | lsm.cmd_type = LTTNG_REGENERATE_METADATA; |
93ec662e | 2981 | |
1da0efb1 | 2982 | ret = lttng_strncpy(lsm.session.name, session_name, |
93ec662e | 2983 | sizeof(lsm.session.name)); |
1da0efb1 JG |
2984 | if (ret) { |
2985 | ret = -LTTNG_ERR_INVALID; | |
2986 | goto end; | |
2987 | } | |
93ec662e JD |
2988 | |
2989 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
2990 | if (ret < 0) { | |
2991 | goto end; | |
2992 | } | |
2993 | ||
2994 | ret = 0; | |
2995 | end: | |
2996 | return ret; | |
2997 | } | |
2998 | ||
eded6438 JD |
2999 | /* |
3000 | * Deprecated, replaced by lttng_regenerate_metadata. | |
3001 | */ | |
3002 | int lttng_metadata_regenerate(const char *session_name) | |
3003 | { | |
3004 | return lttng_regenerate_metadata(session_name); | |
3005 | } | |
3006 | ||
c2561365 JD |
3007 | /* |
3008 | * Regenerate the statedump of a session. | |
3009 | * Return 0 on success, a negative error code on error. | |
3010 | */ | |
3011 | int lttng_regenerate_statedump(const char *session_name) | |
3012 | { | |
3013 | int ret; | |
3014 | struct lttcomm_session_msg lsm; | |
3015 | ||
3016 | if (!session_name) { | |
3017 | ret = -LTTNG_ERR_INVALID; | |
3018 | goto end; | |
3019 | } | |
3020 | ||
3021 | memset(&lsm, 0, sizeof(lsm)); | |
3022 | lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; | |
3023 | ||
1da0efb1 | 3024 | ret = lttng_strncpy(lsm.session.name, session_name, |
c2561365 | 3025 | sizeof(lsm.session.name)); |
1da0efb1 JG |
3026 | if (ret) { |
3027 | ret = -LTTNG_ERR_INVALID; | |
3028 | goto end; | |
3029 | } | |
c2561365 JD |
3030 | |
3031 | ret = lttng_ctl_ask_sessiond(&lsm, NULL); | |
3032 | if (ret < 0) { | |
3033 | goto end; | |
3034 | } | |
3035 | ||
3036 | ret = 0; | |
3037 | end: | |
3038 | return ret; | |
3039 | } | |
3040 | ||
a58c490f JG |
3041 | int lttng_register_trigger(struct lttng_trigger *trigger) |
3042 | { | |
3043 | int ret; | |
3044 | struct lttcomm_session_msg lsm; | |
3647288f | 3045 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3046 | |
3647288f | 3047 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3048 | if (!trigger) { |
3049 | ret = -LTTNG_ERR_INVALID; | |
3050 | goto end; | |
3051 | } | |
3052 | ||
3053 | if (!lttng_trigger_validate(trigger)) { | |
eac4828d | 3054 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3055 | goto end; |
3056 | } | |
3057 | ||
3647288f JG |
3058 | ret = lttng_trigger_serialize(trigger, &buffer); |
3059 | if (ret < 0) { | |
a58c490f JG |
3060 | ret = -LTTNG_ERR_UNK; |
3061 | goto end; | |
3062 | } | |
3063 | ||
a58c490f JG |
3064 | memset(&lsm, 0, sizeof(lsm)); |
3065 | lsm.cmd_type = LTTNG_REGISTER_TRIGGER; | |
3647288f JG |
3066 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3067 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3068 | buffer.size, NULL); | |
a58c490f | 3069 | end: |
3647288f | 3070 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3071 | return ret; |
3072 | } | |
3073 | ||
3074 | int lttng_unregister_trigger(struct lttng_trigger *trigger) | |
3075 | { | |
3076 | int ret; | |
3077 | struct lttcomm_session_msg lsm; | |
3647288f | 3078 | struct lttng_dynamic_buffer buffer; |
a58c490f | 3079 | |
3647288f | 3080 | lttng_dynamic_buffer_init(&buffer); |
a58c490f JG |
3081 | if (!trigger) { |
3082 | ret = -LTTNG_ERR_INVALID; | |
3083 | goto end; | |
3084 | } | |
3085 | ||
3086 | if (!lttng_trigger_validate(trigger)) { | |
3647288f | 3087 | ret = -LTTNG_ERR_INVALID_TRIGGER; |
a58c490f JG |
3088 | goto end; |
3089 | } | |
3090 | ||
3647288f JG |
3091 | ret = lttng_trigger_serialize(trigger, &buffer); |
3092 | if (ret < 0) { | |
a58c490f JG |
3093 | ret = -LTTNG_ERR_UNK; |
3094 | goto end; | |
3095 | } | |
3096 | ||
a58c490f JG |
3097 | memset(&lsm, 0, sizeof(lsm)); |
3098 | lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER; | |
3647288f JG |
3099 | lsm.u.trigger.length = (uint32_t) buffer.size; |
3100 | ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data, | |
3101 | buffer.size, NULL); | |
a58c490f | 3102 | end: |
3647288f | 3103 | lttng_dynamic_buffer_reset(&buffer); |
a58c490f JG |
3104 | return ret; |
3105 | } | |
3106 | ||
fac6795d | 3107 | /* |
9ae110e2 | 3108 | * lib constructor. |
fac6795d | 3109 | */ |
b2b89e8a | 3110 | static void __attribute__((constructor)) init(void) |
fac6795d DG |
3111 | { |
3112 | /* Set default session group */ | |
bbccc3d2 | 3113 | lttng_set_tracing_group(DEFAULT_TRACING_GROUP); |
fac6795d | 3114 | } |
49cca668 DG |
3115 | |
3116 | /* | |
9ae110e2 | 3117 | * lib destructor. |
49cca668 | 3118 | */ |
b2b89e8a | 3119 | static void __attribute__((destructor)) lttng_ctl_exit(void) |
49cca668 DG |
3120 | { |
3121 | free(tracing_group); | |
3122 | } |