Commit | Line | Data |
---|---|---|
54d01ffb DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; only version 2 of the License. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307, USA. | |
16 | */ | |
17 | ||
be040666 | 18 | #define _GNU_SOURCE |
d87bfb32 | 19 | #include <errno.h> |
54d01ffb | 20 | #include <urcu/list.h> |
2bdd86d4 | 21 | #include <string.h> |
54d01ffb DG |
22 | |
23 | #include <lttng/lttng.h> | |
24 | #include <lttng-sessiond-comm.h> | |
25 | #include <lttngerr.h> | |
26 | ||
27 | #include "channel.h" | |
28 | #include "event.h" | |
48842b30 | 29 | #include "hashtable.h" |
4771f025 | 30 | #include "kernel.h" |
9df8df5e | 31 | #include "ust-ctl.h" |
edb67388 DG |
32 | #include "ust-app.h" |
33 | #include "trace-kernel.h" | |
34 | #include "trace-ust.h" | |
54d01ffb | 35 | |
8c9ae521 DG |
36 | /* |
37 | * Setup a lttng_event used to enable *all* syscall tracing. | |
38 | */ | |
39 | static void init_syscalls_kernel_event(struct lttng_event *event) | |
40 | { | |
41 | event->name[0] = '\0'; | |
42 | /* | |
43 | * We use LTTNG_EVENT* here since the trace kernel creation will make the | |
44 | * right changes for the kernel. | |
45 | */ | |
46 | event->type = LTTNG_EVENT_SYSCALL; | |
47 | } | |
48 | ||
54d01ffb | 49 | /* |
7a3d1328 | 50 | * Disable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 51 | */ |
7a3d1328 | 52 | int event_kernel_disable_tracepoint(struct ltt_kernel_session *ksession, |
54d01ffb DG |
53 | struct ltt_kernel_channel *kchan, char *event_name) |
54 | { | |
55 | int ret; | |
56 | struct ltt_kernel_event *kevent; | |
57 | ||
58 | kevent = trace_kernel_get_event_by_name(event_name, kchan); | |
59 | if (kevent == NULL) { | |
60 | ret = LTTCOMM_NO_EVENT; | |
61 | goto error; | |
62 | } | |
63 | ||
64 | ret = kernel_disable_event(kevent); | |
65 | if (ret < 0) { | |
66 | ret = LTTCOMM_KERN_DISABLE_FAIL; | |
67 | goto error; | |
68 | } | |
69 | ||
70 | DBG("Kernel event %s disable for channel %s.", | |
71 | kevent->event->name, kchan->channel->name); | |
72 | ||
73 | ret = LTTCOMM_OK; | |
74 | ||
75 | error: | |
76 | return ret; | |
77 | } | |
78 | ||
79 | /* | |
7a3d1328 | 80 | * Disable kernel tracepoint events for a channel from the kernel session. |
54d01ffb | 81 | */ |
7a3d1328 | 82 | int event_kernel_disable_all_tracepoints(struct ltt_kernel_session *ksession, |
54d01ffb DG |
83 | struct ltt_kernel_channel *kchan) |
84 | { | |
85 | int ret; | |
86 | struct ltt_kernel_event *kevent; | |
87 | ||
88 | /* For each event in the kernel session */ | |
89 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
90 | ret = kernel_disable_event(kevent); | |
91 | if (ret < 0) { | |
92 | /* We continue disabling the rest */ | |
93 | continue; | |
94 | } | |
95 | } | |
54d01ffb | 96 | ret = LTTCOMM_OK; |
7a3d1328 MD |
97 | return ret; |
98 | } | |
99 | ||
100 | /* | |
101 | * Disable kernel syscall events for a channel from the kernel session. | |
102 | */ | |
103 | int event_kernel_disable_all_syscalls(struct ltt_kernel_session *ksession, | |
104 | struct ltt_kernel_channel *kchan) | |
105 | { | |
106 | ERR("Cannot disable syscall tracing for existing session. Please destroy session instead."); | |
107 | return LTTCOMM_OK; /* Return OK so disable all succeeds */ | |
108 | } | |
54d01ffb | 109 | |
7a3d1328 MD |
110 | /* |
111 | * Disable all kernel event for a channel from the kernel session. | |
112 | */ | |
113 | int event_kernel_disable_all(struct ltt_kernel_session *ksession, | |
114 | struct ltt_kernel_channel *kchan) | |
115 | { | |
116 | int ret; | |
117 | ||
118 | ret = event_kernel_disable_all_tracepoints(ksession, kchan); | |
119 | if (ret != LTTCOMM_OK) | |
120 | return ret; | |
121 | ret = event_kernel_disable_all_syscalls(ksession, kchan); | |
54d01ffb DG |
122 | return ret; |
123 | } | |
124 | ||
125 | /* | |
7a3d1328 | 126 | * Enable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 127 | */ |
7a3d1328 | 128 | int event_kernel_enable_tracepoint(struct ltt_kernel_session *ksession, |
54d01ffb DG |
129 | struct ltt_kernel_channel *kchan, struct lttng_event *event) |
130 | { | |
131 | int ret; | |
132 | struct ltt_kernel_event *kevent; | |
133 | ||
134 | kevent = trace_kernel_get_event_by_name(event->name, kchan); | |
135 | if (kevent == NULL) { | |
136 | ret = kernel_create_event(event, kchan); | |
137 | if (ret < 0) { | |
d87bfb32 DG |
138 | if (ret == -EEXIST) { |
139 | ret = LTTCOMM_KERN_EVENT_EXIST; | |
140 | } else { | |
141 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
142 | } | |
7a3d1328 | 143 | goto end; |
54d01ffb DG |
144 | } |
145 | } else if (kevent->enabled == 0) { | |
146 | ret = kernel_enable_event(kevent); | |
147 | if (ret < 0) { | |
148 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
7a3d1328 | 149 | goto end; |
54d01ffb DG |
150 | } |
151 | } | |
54d01ffb | 152 | ret = LTTCOMM_OK; |
7a3d1328 | 153 | end: |
54d01ffb DG |
154 | return ret; |
155 | } | |
156 | ||
157 | /* | |
7a3d1328 | 158 | * Enable all kernel tracepoint events of a channel of the kernel session. |
54d01ffb | 159 | */ |
7a3d1328 | 160 | int event_kernel_enable_all_tracepoints(struct ltt_kernel_session *ksession, |
54d01ffb DG |
161 | struct ltt_kernel_channel *kchan, int kernel_tracer_fd) |
162 | { | |
163 | int size, i, ret; | |
164 | struct ltt_kernel_event *kevent; | |
8f69e5eb | 165 | struct lttng_event *event_list = NULL; |
54d01ffb DG |
166 | |
167 | /* For each event in the kernel session */ | |
168 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
8f69e5eb DG |
169 | if (kevent->enabled == 0) { |
170 | ret = kernel_enable_event(kevent); | |
171 | if (ret < 0) { | |
172 | /* Enable failed but still continue */ | |
173 | continue; | |
174 | } | |
54d01ffb DG |
175 | } |
176 | } | |
177 | ||
178 | size = kernel_list_events(kernel_tracer_fd, &event_list); | |
179 | if (size < 0) { | |
180 | ret = LTTCOMM_KERN_LIST_FAIL; | |
7a3d1328 | 181 | goto end; |
54d01ffb DG |
182 | } |
183 | ||
184 | for (i = 0; i < size; i++) { | |
185 | kevent = trace_kernel_get_event_by_name(event_list[i].name, kchan); | |
186 | if (kevent == NULL) { | |
187 | /* Default event type for enable all */ | |
188 | event_list[i].type = LTTNG_EVENT_TRACEPOINT; | |
189 | /* Enable each single tracepoint event */ | |
190 | ret = kernel_create_event(&event_list[i], kchan); | |
191 | if (ret < 0) { | |
192 | /* Ignore error here and continue */ | |
193 | } | |
194 | } | |
195 | } | |
54d01ffb | 196 | free(event_list); |
8f69e5eb | 197 | |
54d01ffb | 198 | ret = LTTCOMM_OK; |
7a3d1328 | 199 | end: |
54d01ffb | 200 | return ret; |
7a3d1328 | 201 | |
54d01ffb | 202 | } |
8c9ae521 DG |
203 | |
204 | /* | |
7a3d1328 | 205 | * Enable all kernel tracepoint events of a channel of the kernel session. |
8c9ae521 | 206 | */ |
7a3d1328 | 207 | int event_kernel_enable_all_syscalls(struct ltt_kernel_session *ksession, |
8c9ae521 DG |
208 | struct ltt_kernel_channel *kchan, int kernel_tracer_fd) |
209 | { | |
210 | int ret; | |
211 | struct lttng_event event; | |
212 | ||
213 | init_syscalls_kernel_event(&event); | |
214 | ||
215 | DBG("Enabling all syscall tracing"); | |
216 | ||
217 | ret = kernel_create_event(&event, kchan); | |
218 | if (ret < 0) { | |
8f69e5eb DG |
219 | if (ret == -EEXIST) { |
220 | ret = LTTCOMM_KERN_EVENT_EXIST; | |
221 | } else { | |
222 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
223 | } | |
7a3d1328 | 224 | goto end; |
8c9ae521 | 225 | } |
8f69e5eb | 226 | |
8c9ae521 | 227 | ret = LTTCOMM_OK; |
7a3d1328 MD |
228 | end: |
229 | return ret; | |
230 | } | |
8c9ae521 | 231 | |
7a3d1328 MD |
232 | /* |
233 | * Enable all kernel events of a channel of the kernel session. | |
234 | */ | |
235 | int event_kernel_enable_all(struct ltt_kernel_session *ksession, | |
236 | struct ltt_kernel_channel *kchan, int kernel_tracer_fd) | |
237 | { | |
238 | int ret; | |
239 | ||
240 | ret = event_kernel_enable_all_tracepoints(ksession, kchan, kernel_tracer_fd); | |
241 | if (ret != LTTCOMM_OK) { | |
242 | goto end; | |
243 | } | |
244 | ret = event_kernel_enable_all_syscalls(ksession, kchan, kernel_tracer_fd); | |
245 | end: | |
8c9ae521 DG |
246 | return ret; |
247 | } | |
2bdd86d4 | 248 | |
7f79d3a1 DG |
249 | /* |
250 | * ============================ | |
251 | * UST : The Ultimate Frontier! | |
252 | * ============================ | |
253 | */ | |
254 | ||
76d45b40 DG |
255 | /* |
256 | * Enable all UST tracepoints for a channel from a UST session. | |
257 | */ | |
258 | int event_ust_enable_all_tracepoints(struct ltt_ust_session *usess, int domain, | |
259 | struct ltt_ust_channel *uchan) | |
260 | { | |
261 | int ret, i; | |
262 | size_t size; | |
263 | struct cds_lfht_iter iter; | |
264 | struct ltt_ust_event *uevent = NULL; | |
7f79d3a1 | 265 | struct lttng_event *events = NULL; |
76d45b40 DG |
266 | |
267 | switch (domain) { | |
268 | case LTTNG_DOMAIN_UST: | |
269 | { | |
270 | /* Enable existing events */ | |
271 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { | |
272 | if (uevent->enabled == 0) { | |
273 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
274 | if (ret < 0) { | |
275 | continue; | |
276 | } | |
277 | uevent->enabled = 1; | |
278 | } | |
279 | } | |
280 | ||
281 | /* Get all UST available events */ | |
282 | size = ust_app_list_events(&events); | |
283 | if (size < 0) { | |
284 | ret = LTTCOMM_UST_LIST_FAIL; | |
285 | goto error; | |
286 | } | |
287 | ||
288 | for (i = 0; i < size; i++) { | |
289 | /* | |
290 | * Check if event exist and if so, continue since it was enable | |
291 | * previously. | |
292 | */ | |
293 | uevent = trace_ust_find_event_by_name(uchan->events, | |
294 | events[i].name); | |
295 | if (uevent != NULL) { | |
296 | ret = ust_app_enable_event_pid(usess, uchan, uevent, | |
297 | events[i].pid); | |
298 | if (ret < 0) { | |
299 | if (ret != -EEXIST) { | |
300 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
301 | goto error; | |
302 | } | |
303 | } | |
304 | continue; | |
305 | } | |
306 | ||
307 | /* Create ust event */ | |
308 | uevent = trace_ust_create_event(&events[i]); | |
309 | if (uevent == NULL) { | |
310 | ret = LTTCOMM_FATAL; | |
7f79d3a1 | 311 | goto error_destroy; |
76d45b40 DG |
312 | } |
313 | ||
314 | /* Create event for the specific PID */ | |
315 | ret = ust_app_enable_event_pid(usess, uchan, uevent, | |
316 | events[i].pid); | |
317 | if (ret < 0) { | |
318 | if (ret == -EEXIST) { | |
319 | ret = LTTCOMM_UST_EVENT_EXIST; | |
7f79d3a1 | 320 | goto error; |
76d45b40 DG |
321 | } else { |
322 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
7f79d3a1 | 323 | goto error_destroy; |
76d45b40 | 324 | } |
76d45b40 DG |
325 | } |
326 | ||
327 | uevent->enabled = 1; | |
328 | /* Add ltt ust event to channel */ | |
329 | rcu_read_lock(); | |
330 | hashtable_add_unique(uchan->events, &uevent->node); | |
331 | rcu_read_unlock(); | |
332 | } | |
333 | ||
334 | free(events); | |
335 | break; | |
336 | } | |
337 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
338 | case LTTNG_DOMAIN_UST_PID: | |
339 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
340 | default: | |
341 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
342 | goto error; | |
343 | } | |
344 | ||
345 | return LTTCOMM_OK; | |
346 | ||
7f79d3a1 | 347 | error_destroy: |
76d45b40 | 348 | trace_ust_destroy_event(uevent); |
7f79d3a1 DG |
349 | |
350 | error: | |
351 | free(events); | |
76d45b40 DG |
352 | return ret; |
353 | } | |
354 | ||
2bdd86d4 MD |
355 | /* |
356 | * Enable UST tracepoint event for a channel from a UST session. | |
357 | */ | |
edb67388 DG |
358 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, int domain, |
359 | struct ltt_ust_channel *uchan, struct lttng_event *event) | |
2bdd86d4 | 360 | { |
edb67388 DG |
361 | int ret, to_create = 0; |
362 | struct ltt_ust_event *uevent; | |
363 | ||
364 | uevent = trace_ust_find_event_by_name(uchan->events, event->name); | |
365 | if (uevent == NULL) { | |
366 | uevent = trace_ust_create_event(event); | |
367 | if (uevent == NULL) { | |
368 | ret = LTTCOMM_FATAL; | |
369 | goto error; | |
370 | } | |
371 | to_create = 1; | |
372 | } | |
2bdd86d4 | 373 | |
7f79d3a1 DG |
374 | if (uevent->enabled) { |
375 | /* It's already enabled so everything is OK */ | |
7f79d3a1 DG |
376 | goto end; |
377 | } | |
378 | ||
edb67388 DG |
379 | switch (domain) { |
380 | case LTTNG_DOMAIN_UST: | |
381 | { | |
382 | if (to_create) { | |
383 | /* Create event on all UST registered apps for session */ | |
35a9059d | 384 | ret = ust_app_create_event_glb(usess, uchan, uevent); |
edb67388 DG |
385 | } else { |
386 | /* Enable event on all UST registered apps for session */ | |
35a9059d | 387 | ret = ust_app_enable_event_glb(usess, uchan, uevent); |
edb67388 | 388 | } |
48842b30 | 389 | |
edb67388 DG |
390 | if (ret < 0) { |
391 | if (ret == -EEXIST) { | |
392 | ret = LTTCOMM_UST_EVENT_EXIST; | |
7f79d3a1 | 393 | goto end; |
edb67388 DG |
394 | } else { |
395 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
7f79d3a1 | 396 | goto error; |
edb67388 | 397 | } |
edb67388 | 398 | } |
edb67388 DG |
399 | break; |
400 | } | |
401 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
402 | case LTTNG_DOMAIN_UST_PID: | |
403 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
404 | default: | |
405 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
7f79d3a1 | 406 | goto end; |
2bdd86d4 | 407 | } |
48842b30 | 408 | |
48842b30 | 409 | uevent->enabled = 1; |
edb67388 | 410 | /* Add ltt ust event to channel */ |
7f79d3a1 DG |
411 | if (to_create) { |
412 | rcu_read_lock(); | |
413 | hashtable_add_unique(uchan->events, &uevent->node); | |
414 | rcu_read_unlock(); | |
415 | } | |
edb67388 | 416 | |
7f79d3a1 DG |
417 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
418 | to_create ? "created" : "enabled", uchan->name); | |
419 | ||
fb89d070 DG |
420 | end: |
421 | return LTTCOMM_OK; | |
edb67388 DG |
422 | |
423 | error: | |
424 | trace_ust_destroy_event(uevent); | |
2bdd86d4 MD |
425 | return ret; |
426 | } | |
427 | ||
7f79d3a1 DG |
428 | /* |
429 | * Disable UST tracepoint of a channel from a UST session. | |
430 | */ | |
431 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, int domain, | |
432 | struct ltt_ust_channel *uchan, char *event_name) | |
2bdd86d4 MD |
433 | { |
434 | int ret; | |
7f79d3a1 | 435 | struct ltt_ust_event *uevent; |
2bdd86d4 | 436 | |
7f79d3a1 DG |
437 | uevent = trace_ust_find_event_by_name(uchan->events, event_name); |
438 | if (uevent == NULL) { | |
439 | ret = LTTCOMM_UST_EVENT_NOT_FOUND; | |
440 | goto error; | |
2bdd86d4 | 441 | } |
7f79d3a1 DG |
442 | |
443 | if (uevent->enabled == 0) { | |
444 | /* It's already enabled so everything is OK */ | |
445 | ret = LTTCOMM_OK; | |
2bdd86d4 MD |
446 | goto end; |
447 | } | |
7f79d3a1 DG |
448 | |
449 | switch (domain) { | |
450 | case LTTNG_DOMAIN_UST: | |
451 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
452 | if (ret < 0 && ret != -EEXIST) { | |
453 | ret = LTTCOMM_UST_DISABLE_FAIL; | |
454 | goto error; | |
455 | } | |
456 | break; | |
457 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
458 | case LTTNG_DOMAIN_UST_PID: | |
459 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
460 | default: | |
461 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
462 | goto error; | |
463 | } | |
464 | ||
465 | uevent->enabled = 0; | |
2bdd86d4 | 466 | ret = LTTCOMM_OK; |
7f79d3a1 | 467 | |
2bdd86d4 | 468 | end: |
7f79d3a1 DG |
469 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
470 | uchan->name); | |
471 | ||
472 | error: | |
473 | return ret; | |
474 | } | |
475 | ||
476 | /* | |
477 | * Disable all UST tracepoints for a channel from a UST session. | |
478 | */ | |
479 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, int domain, | |
480 | struct ltt_ust_channel *uchan) | |
481 | { | |
482 | int ret, i; | |
483 | size_t size; | |
484 | struct cds_lfht_iter iter; | |
485 | struct ltt_ust_event *uevent = NULL; | |
486 | struct lttng_event *events = NULL; | |
487 | ||
488 | switch (domain) { | |
489 | case LTTNG_DOMAIN_UST: | |
490 | { | |
491 | /* Disabling existing events */ | |
492 | cds_lfht_for_each_entry(uchan->events, &iter, uevent, node) { | |
493 | if (uevent->enabled == 1) { | |
494 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
495 | if (ret < 0) { | |
496 | continue; | |
497 | } | |
498 | uevent->enabled = 0; | |
499 | } | |
500 | } | |
501 | ||
502 | /* Get all UST available events */ | |
503 | size = ust_app_list_events(&events); | |
504 | if (size < 0) { | |
505 | ret = LTTCOMM_UST_LIST_FAIL; | |
506 | goto error; | |
507 | } | |
508 | ||
509 | for (i = 0; i < size; i++) { | |
510 | uevent = trace_ust_find_event_by_name(uchan->events, | |
511 | events[i].name); | |
512 | if (uevent != NULL && uevent->enabled == 1) { | |
513 | ret = ust_app_disable_event_pid(usess, uchan, uevent, | |
514 | events[i].pid); | |
515 | if (ret < 0 && ret != -EEXIST) { | |
516 | ret = LTTCOMM_UST_DISABLE_FAIL; | |
517 | goto error; | |
518 | } | |
519 | uevent->enabled = 0; | |
520 | continue; | |
521 | } | |
522 | } | |
523 | ||
524 | free(events); | |
525 | break; | |
526 | } | |
527 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
528 | case LTTNG_DOMAIN_UST_PID: | |
529 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
530 | default: | |
531 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
532 | goto error; | |
533 | } | |
534 | ||
535 | return LTTCOMM_OK; | |
536 | ||
537 | error: | |
538 | free(events); | |
2bdd86d4 MD |
539 | return ret; |
540 | } |