Commit | Line | Data |
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54d01ffb DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
54d01ffb | 7 | * |
d14d33bf AM |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
54d01ffb | 12 | * |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
54d01ffb DG |
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> | |
db758600 | 24 | #include <common/error.h> |
10a8a223 | 25 | #include <common/sessiond-comm/sessiond-comm.h> |
54d01ffb DG |
26 | |
27 | #include "channel.h" | |
28 | #include "event.h" | |
4771f025 | 29 | #include "kernel.h" |
9df8df5e | 30 | #include "ust-ctl.h" |
edb67388 DG |
31 | #include "ust-app.h" |
32 | #include "trace-kernel.h" | |
33 | #include "trace-ust.h" | |
54d01ffb | 34 | |
8c9ae521 DG |
35 | /* |
36 | * Setup a lttng_event used to enable *all* syscall tracing. | |
37 | */ | |
38 | static void init_syscalls_kernel_event(struct lttng_event *event) | |
39 | { | |
40 | event->name[0] = '\0'; | |
41 | /* | |
42 | * We use LTTNG_EVENT* here since the trace kernel creation will make the | |
43 | * right changes for the kernel. | |
44 | */ | |
45 | event->type = LTTNG_EVENT_SYSCALL; | |
46 | } | |
47 | ||
a027b2d2 MD |
48 | /* |
49 | * Return 1 if loglevels match or 0 on failure. | |
50 | */ | |
51 | static int loglevel_match(struct ltt_ust_event *uevent, | |
52 | enum lttng_ust_loglevel_type log_type, int loglevel) | |
53 | { | |
51f1a3b9 DG |
54 | /* |
55 | * For the loglevel type ALL, the loglevel is set to -1 but the event | |
56 | * received by the session daemon is 0 which does not match the negative | |
57 | * value in the existing event. | |
58 | */ | |
59 | if (log_type == LTTNG_UST_LOGLEVEL_ALL) { | |
60 | loglevel = -1; | |
61 | } | |
62 | ||
a027b2d2 MD |
63 | if (uevent == NULL || uevent->attr.loglevel_type != log_type || |
64 | uevent->attr.loglevel != loglevel) { | |
65 | goto no_match; | |
66 | } | |
67 | ||
68 | return 1; | |
69 | ||
70 | no_match: | |
71 | return 0; | |
72 | } | |
73 | ||
54d01ffb | 74 | /* |
7a3d1328 | 75 | * Disable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 76 | */ |
7a3d1328 | 77 | int event_kernel_disable_tracepoint(struct ltt_kernel_session *ksession, |
54d01ffb DG |
78 | struct ltt_kernel_channel *kchan, char *event_name) |
79 | { | |
80 | int ret; | |
81 | struct ltt_kernel_event *kevent; | |
82 | ||
83 | kevent = trace_kernel_get_event_by_name(event_name, kchan); | |
84 | if (kevent == NULL) { | |
f73fabfd | 85 | ret = LTTNG_ERR_NO_EVENT; |
54d01ffb DG |
86 | goto error; |
87 | } | |
88 | ||
89 | ret = kernel_disable_event(kevent); | |
90 | if (ret < 0) { | |
f73fabfd | 91 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; |
54d01ffb DG |
92 | goto error; |
93 | } | |
94 | ||
95 | DBG("Kernel event %s disable for channel %s.", | |
96 | kevent->event->name, kchan->channel->name); | |
97 | ||
f73fabfd | 98 | ret = LTTNG_OK; |
54d01ffb DG |
99 | |
100 | error: | |
101 | return ret; | |
102 | } | |
103 | ||
104 | /* | |
7a3d1328 | 105 | * Disable kernel tracepoint events for a channel from the kernel session. |
54d01ffb | 106 | */ |
7a3d1328 | 107 | int event_kernel_disable_all_tracepoints(struct ltt_kernel_session *ksession, |
54d01ffb DG |
108 | struct ltt_kernel_channel *kchan) |
109 | { | |
110 | int ret; | |
111 | struct ltt_kernel_event *kevent; | |
112 | ||
113 | /* For each event in the kernel session */ | |
114 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
115 | ret = kernel_disable_event(kevent); | |
116 | if (ret < 0) { | |
117 | /* We continue disabling the rest */ | |
118 | continue; | |
119 | } | |
120 | } | |
f73fabfd | 121 | ret = LTTNG_OK; |
7a3d1328 MD |
122 | return ret; |
123 | } | |
124 | ||
125 | /* | |
126 | * Disable kernel syscall events for a channel from the kernel session. | |
127 | */ | |
128 | int event_kernel_disable_all_syscalls(struct ltt_kernel_session *ksession, | |
129 | struct ltt_kernel_channel *kchan) | |
130 | { | |
131 | ERR("Cannot disable syscall tracing for existing session. Please destroy session instead."); | |
f73fabfd | 132 | return LTTNG_OK; /* Return OK so disable all succeeds */ |
7a3d1328 | 133 | } |
54d01ffb | 134 | |
7a3d1328 MD |
135 | /* |
136 | * Disable all kernel event for a channel from the kernel session. | |
137 | */ | |
138 | int event_kernel_disable_all(struct ltt_kernel_session *ksession, | |
139 | struct ltt_kernel_channel *kchan) | |
140 | { | |
141 | int ret; | |
142 | ||
143 | ret = event_kernel_disable_all_tracepoints(ksession, kchan); | |
f73fabfd | 144 | if (ret != LTTNG_OK) |
7a3d1328 MD |
145 | return ret; |
146 | ret = event_kernel_disable_all_syscalls(ksession, kchan); | |
54d01ffb DG |
147 | return ret; |
148 | } | |
149 | ||
150 | /* | |
7a3d1328 | 151 | * Enable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 152 | */ |
7a3d1328 | 153 | int event_kernel_enable_tracepoint(struct ltt_kernel_session *ksession, |
54d01ffb DG |
154 | struct ltt_kernel_channel *kchan, struct lttng_event *event) |
155 | { | |
156 | int ret; | |
157 | struct ltt_kernel_event *kevent; | |
158 | ||
159 | kevent = trace_kernel_get_event_by_name(event->name, kchan); | |
160 | if (kevent == NULL) { | |
161 | ret = kernel_create_event(event, kchan); | |
162 | if (ret < 0) { | |
bd29c13d DG |
163 | switch (-ret) { |
164 | case EEXIST: | |
f73fabfd | 165 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
166 | break; |
167 | case ENOSYS: | |
f73fabfd | 168 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
169 | break; |
170 | default: | |
f73fabfd | 171 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 172 | break; |
d87bfb32 | 173 | } |
7a3d1328 | 174 | goto end; |
54d01ffb DG |
175 | } |
176 | } else if (kevent->enabled == 0) { | |
177 | ret = kernel_enable_event(kevent); | |
178 | if (ret < 0) { | |
f73fabfd | 179 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 180 | goto end; |
54d01ffb | 181 | } |
42224349 DG |
182 | } else { |
183 | /* At this point, the event is considered enabled */ | |
f73fabfd | 184 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 185 | goto end; |
54d01ffb | 186 | } |
42224349 | 187 | |
f73fabfd | 188 | ret = LTTNG_OK; |
7a3d1328 | 189 | end: |
54d01ffb DG |
190 | return ret; |
191 | } | |
192 | ||
193 | /* | |
7a3d1328 | 194 | * Enable all kernel tracepoint events of a channel of the kernel session. |
54d01ffb | 195 | */ |
7a3d1328 | 196 | int event_kernel_enable_all_tracepoints(struct ltt_kernel_session *ksession, |
54d01ffb DG |
197 | struct ltt_kernel_channel *kchan, int kernel_tracer_fd) |
198 | { | |
199 | int size, i, ret; | |
200 | struct ltt_kernel_event *kevent; | |
8f69e5eb | 201 | struct lttng_event *event_list = NULL; |
54d01ffb DG |
202 | |
203 | /* For each event in the kernel session */ | |
204 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
8f69e5eb DG |
205 | if (kevent->enabled == 0) { |
206 | ret = kernel_enable_event(kevent); | |
207 | if (ret < 0) { | |
208 | /* Enable failed but still continue */ | |
209 | continue; | |
210 | } | |
54d01ffb DG |
211 | } |
212 | } | |
213 | ||
214 | size = kernel_list_events(kernel_tracer_fd, &event_list); | |
215 | if (size < 0) { | |
f73fabfd | 216 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
7a3d1328 | 217 | goto end; |
54d01ffb DG |
218 | } |
219 | ||
220 | for (i = 0; i < size; i++) { | |
221 | kevent = trace_kernel_get_event_by_name(event_list[i].name, kchan); | |
222 | if (kevent == NULL) { | |
223 | /* Default event type for enable all */ | |
224 | event_list[i].type = LTTNG_EVENT_TRACEPOINT; | |
225 | /* Enable each single tracepoint event */ | |
226 | ret = kernel_create_event(&event_list[i], kchan); | |
227 | if (ret < 0) { | |
228 | /* Ignore error here and continue */ | |
229 | } | |
230 | } | |
231 | } | |
54d01ffb | 232 | free(event_list); |
8f69e5eb | 233 | |
f73fabfd | 234 | ret = LTTNG_OK; |
7a3d1328 | 235 | end: |
54d01ffb | 236 | return ret; |
7a3d1328 | 237 | |
54d01ffb | 238 | } |
8c9ae521 DG |
239 | |
240 | /* | |
7a3d1328 | 241 | * Enable all kernel tracepoint events of a channel of the kernel session. |
8c9ae521 | 242 | */ |
7a3d1328 | 243 | int event_kernel_enable_all_syscalls(struct ltt_kernel_session *ksession, |
8c9ae521 DG |
244 | struct ltt_kernel_channel *kchan, int kernel_tracer_fd) |
245 | { | |
246 | int ret; | |
247 | struct lttng_event event; | |
248 | ||
249 | init_syscalls_kernel_event(&event); | |
250 | ||
251 | DBG("Enabling all syscall tracing"); | |
252 | ||
253 | ret = kernel_create_event(&event, kchan); | |
254 | if (ret < 0) { | |
8f69e5eb | 255 | if (ret == -EEXIST) { |
f73fabfd | 256 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
8f69e5eb | 257 | } else { |
f73fabfd | 258 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
8f69e5eb | 259 | } |
7a3d1328 | 260 | goto end; |
8c9ae521 | 261 | } |
8f69e5eb | 262 | |
f73fabfd | 263 | ret = LTTNG_OK; |
7a3d1328 MD |
264 | end: |
265 | return ret; | |
266 | } | |
8c9ae521 | 267 | |
7a3d1328 MD |
268 | /* |
269 | * Enable all kernel events of a channel of the kernel session. | |
270 | */ | |
271 | int event_kernel_enable_all(struct ltt_kernel_session *ksession, | |
272 | struct ltt_kernel_channel *kchan, int kernel_tracer_fd) | |
273 | { | |
6bd8707a | 274 | int tp_ret; |
7a3d1328 | 275 | |
bd29c13d | 276 | tp_ret = event_kernel_enable_all_tracepoints(ksession, kchan, kernel_tracer_fd); |
f73fabfd | 277 | if (tp_ret != LTTNG_OK) { |
7a3d1328 MD |
278 | goto end; |
279 | } | |
bd29c13d DG |
280 | |
281 | /* | |
282 | * Reaching this code path means that all tracepoints were enabled without | |
283 | * errors so we ignore the error value of syscalls. | |
284 | * | |
285 | * At the moment, failing to enable syscalls on "lttng enable-event -a -k" | |
286 | * is not considered an error that need to be returned to the client since | |
287 | * tracepoints did not fail. Future work will allow us to send back | |
288 | * multiple errors to the client in one API call. | |
289 | */ | |
6bd8707a | 290 | (void) event_kernel_enable_all_syscalls(ksession, kchan, kernel_tracer_fd); |
bd29c13d | 291 | |
7a3d1328 | 292 | end: |
bd29c13d | 293 | return tp_ret; |
8c9ae521 | 294 | } |
2bdd86d4 | 295 | |
7f79d3a1 DG |
296 | /* |
297 | * ============================ | |
298 | * UST : The Ultimate Frontier! | |
299 | * ============================ | |
300 | */ | |
301 | ||
76d45b40 DG |
302 | /* |
303 | * Enable all UST tracepoints for a channel from a UST session. | |
304 | */ | |
305 | int event_ust_enable_all_tracepoints(struct ltt_ust_session *usess, int domain, | |
306 | struct ltt_ust_channel *uchan) | |
307 | { | |
6775595e | 308 | int ret, i, size; |
bec39940 | 309 | struct lttng_ht_iter iter; |
76d45b40 | 310 | struct ltt_ust_event *uevent = NULL; |
7f79d3a1 | 311 | struct lttng_event *events = NULL; |
76d45b40 DG |
312 | |
313 | switch (domain) { | |
314 | case LTTNG_DOMAIN_UST: | |
315 | { | |
316 | /* Enable existing events */ | |
bec39940 DG |
317 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, |
318 | node.node) { | |
76d45b40 DG |
319 | if (uevent->enabled == 0) { |
320 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
321 | if (ret < 0) { | |
322 | continue; | |
323 | } | |
324 | uevent->enabled = 1; | |
325 | } | |
326 | } | |
327 | ||
328 | /* Get all UST available events */ | |
329 | size = ust_app_list_events(&events); | |
330 | if (size < 0) { | |
f73fabfd | 331 | ret = LTTNG_ERR_UST_LIST_FAIL; |
76d45b40 DG |
332 | goto error; |
333 | } | |
334 | ||
335 | for (i = 0; i < size; i++) { | |
336 | /* | |
337 | * Check if event exist and if so, continue since it was enable | |
338 | * previously. | |
339 | */ | |
340 | uevent = trace_ust_find_event_by_name(uchan->events, | |
341 | events[i].name); | |
342 | if (uevent != NULL) { | |
343 | ret = ust_app_enable_event_pid(usess, uchan, uevent, | |
344 | events[i].pid); | |
345 | if (ret < 0) { | |
346 | if (ret != -EEXIST) { | |
f73fabfd | 347 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
76d45b40 DG |
348 | goto error; |
349 | } | |
350 | } | |
351 | continue; | |
352 | } | |
353 | ||
354 | /* Create ust event */ | |
355 | uevent = trace_ust_create_event(&events[i]); | |
356 | if (uevent == NULL) { | |
f73fabfd | 357 | ret = LTTNG_ERR_FATAL; |
7f79d3a1 | 358 | goto error_destroy; |
76d45b40 DG |
359 | } |
360 | ||
361 | /* Create event for the specific PID */ | |
362 | ret = ust_app_enable_event_pid(usess, uchan, uevent, | |
363 | events[i].pid); | |
364 | if (ret < 0) { | |
365 | if (ret == -EEXIST) { | |
f73fabfd | 366 | ret = LTTNG_ERR_UST_EVENT_EXIST; |
7f79d3a1 | 367 | goto error; |
76d45b40 | 368 | } else { |
f73fabfd | 369 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
7f79d3a1 | 370 | goto error_destroy; |
76d45b40 | 371 | } |
76d45b40 DG |
372 | } |
373 | ||
374 | uevent->enabled = 1; | |
375 | /* Add ltt ust event to channel */ | |
376 | rcu_read_lock(); | |
bec39940 | 377 | lttng_ht_add_unique_str(uchan->events, &uevent->node); |
76d45b40 DG |
378 | rcu_read_unlock(); |
379 | } | |
380 | ||
381 | free(events); | |
382 | break; | |
383 | } | |
d78d6610 | 384 | #if 0 |
76d45b40 DG |
385 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
386 | case LTTNG_DOMAIN_UST_PID: | |
387 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 388 | #endif |
76d45b40 | 389 | default: |
f73fabfd | 390 | ret = LTTNG_ERR_UND; |
76d45b40 DG |
391 | goto error; |
392 | } | |
393 | ||
f73fabfd | 394 | return LTTNG_OK; |
76d45b40 | 395 | |
7f79d3a1 | 396 | error_destroy: |
76d45b40 | 397 | trace_ust_destroy_event(uevent); |
7f79d3a1 DG |
398 | |
399 | error: | |
400 | free(events); | |
76d45b40 DG |
401 | return ret; |
402 | } | |
403 | ||
2bdd86d4 MD |
404 | /* |
405 | * Enable UST tracepoint event for a channel from a UST session. | |
406 | */ | |
edb67388 DG |
407 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, int domain, |
408 | struct ltt_ust_channel *uchan, struct lttng_event *event) | |
2bdd86d4 | 409 | { |
f73fabfd | 410 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
411 | struct ltt_ust_event *uevent; |
412 | ||
413 | uevent = trace_ust_find_event_by_name(uchan->events, event->name); | |
414 | if (uevent == NULL) { | |
415 | uevent = trace_ust_create_event(event); | |
416 | if (uevent == NULL) { | |
95a82664 | 417 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
418 | goto error; |
419 | } | |
fc34caaa | 420 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
421 | to_create = 1; |
422 | } | |
2bdd86d4 | 423 | |
a027b2d2 MD |
424 | /* Check loglevels */ |
425 | ret = loglevel_match(uevent, event->loglevel_type, event->loglevel); | |
426 | if (ret == 0) { | |
427 | /* | |
428 | * No match meaning that the user tried to enable a known event but | |
429 | * with a different loglevel. | |
430 | */ | |
431 | DBG("Enable event %s does not match existing event %s with loglevel " | |
432 | "respectively of %d and %d", event->name, uevent->attr.name, | |
433 | uevent->attr.loglevel, event->loglevel); | |
f73fabfd | 434 | ret = LTTNG_ERR_EVENT_EXIST_LOGLEVEL; |
a027b2d2 MD |
435 | goto error; |
436 | } | |
437 | ||
7f79d3a1 DG |
438 | if (uevent->enabled) { |
439 | /* It's already enabled so everything is OK */ | |
f73fabfd | 440 | ret = LTTNG_OK; |
7f79d3a1 DG |
441 | goto end; |
442 | } | |
443 | ||
fc34caaa DG |
444 | uevent->enabled = 1; |
445 | ||
edb67388 DG |
446 | switch (domain) { |
447 | case LTTNG_DOMAIN_UST: | |
448 | { | |
449 | if (to_create) { | |
450 | /* Create event on all UST registered apps for session */ | |
35a9059d | 451 | ret = ust_app_create_event_glb(usess, uchan, uevent); |
edb67388 DG |
452 | } else { |
453 | /* Enable event on all UST registered apps for session */ | |
35a9059d | 454 | ret = ust_app_enable_event_glb(usess, uchan, uevent); |
edb67388 | 455 | } |
48842b30 | 456 | |
edb67388 DG |
457 | if (ret < 0) { |
458 | if (ret == -EEXIST) { | |
f73fabfd | 459 | ret = LTTNG_ERR_UST_EVENT_EXIST; |
7f79d3a1 | 460 | goto end; |
edb67388 | 461 | } else { |
f73fabfd | 462 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
7f79d3a1 | 463 | goto error; |
edb67388 | 464 | } |
edb67388 | 465 | } |
edb67388 DG |
466 | break; |
467 | } | |
d78d6610 | 468 | #if 0 |
edb67388 DG |
469 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
470 | case LTTNG_DOMAIN_UST_PID: | |
471 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 472 | #endif |
edb67388 | 473 | default: |
f73fabfd | 474 | ret = LTTNG_ERR_UND; |
7f79d3a1 | 475 | goto end; |
2bdd86d4 | 476 | } |
48842b30 | 477 | |
7f79d3a1 DG |
478 | if (to_create) { |
479 | rcu_read_lock(); | |
fc34caaa | 480 | /* Add ltt ust event to channel */ |
bec39940 | 481 | lttng_ht_add_unique_str(uchan->events, &uevent->node); |
7f79d3a1 DG |
482 | rcu_read_unlock(); |
483 | } | |
edb67388 | 484 | |
7f79d3a1 DG |
485 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
486 | to_create ? "created" : "enabled", uchan->name); | |
487 | ||
f73fabfd | 488 | ret = LTTNG_OK; |
fc34caaa | 489 | |
fb89d070 | 490 | end: |
fc34caaa | 491 | return ret; |
edb67388 DG |
492 | |
493 | error: | |
fc34caaa DG |
494 | /* |
495 | * Only destroy event on creation time (not enabling time) because if the | |
496 | * event is found in the channel (to_create == 0), it means that at some | |
497 | * point the enable_event worked and it's thus valid to keep it alive. | |
498 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
499 | * everyone up. | |
500 | */ | |
501 | if (to_create) { | |
502 | /* In this code path, the uevent was not added to the hash table */ | |
503 | trace_ust_destroy_event(uevent); | |
504 | } | |
2bdd86d4 MD |
505 | return ret; |
506 | } | |
507 | ||
7f79d3a1 DG |
508 | /* |
509 | * Disable UST tracepoint of a channel from a UST session. | |
510 | */ | |
511 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, int domain, | |
512 | struct ltt_ust_channel *uchan, char *event_name) | |
2bdd86d4 MD |
513 | { |
514 | int ret; | |
7f79d3a1 | 515 | struct ltt_ust_event *uevent; |
2bdd86d4 | 516 | |
7f79d3a1 DG |
517 | uevent = trace_ust_find_event_by_name(uchan->events, event_name); |
518 | if (uevent == NULL) { | |
f73fabfd | 519 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 520 | goto error; |
2bdd86d4 | 521 | } |
7f79d3a1 DG |
522 | |
523 | if (uevent->enabled == 0) { | |
524 | /* It's already enabled so everything is OK */ | |
f73fabfd | 525 | ret = LTTNG_OK; |
2bdd86d4 MD |
526 | goto end; |
527 | } | |
7f79d3a1 DG |
528 | |
529 | switch (domain) { | |
530 | case LTTNG_DOMAIN_UST: | |
531 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
532 | if (ret < 0 && ret != -EEXIST) { | |
f73fabfd | 533 | ret = LTTNG_ERR_UST_DISABLE_FAIL; |
7f79d3a1 DG |
534 | goto error; |
535 | } | |
536 | break; | |
d78d6610 | 537 | #if 0 |
7f79d3a1 DG |
538 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
539 | case LTTNG_DOMAIN_UST_PID: | |
540 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 541 | #endif |
7f79d3a1 | 542 | default: |
f73fabfd | 543 | ret = LTTNG_ERR_UND; |
7f79d3a1 DG |
544 | goto error; |
545 | } | |
546 | ||
547 | uevent->enabled = 0; | |
f73fabfd | 548 | ret = LTTNG_OK; |
7f79d3a1 | 549 | |
2bdd86d4 | 550 | end: |
7f79d3a1 DG |
551 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
552 | uchan->name); | |
553 | ||
554 | error: | |
555 | return ret; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Disable all UST tracepoints for a channel from a UST session. | |
560 | */ | |
561 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, int domain, | |
562 | struct ltt_ust_channel *uchan) | |
563 | { | |
6775595e | 564 | int ret, i, size; |
bec39940 | 565 | struct lttng_ht_iter iter; |
7f79d3a1 DG |
566 | struct ltt_ust_event *uevent = NULL; |
567 | struct lttng_event *events = NULL; | |
568 | ||
569 | switch (domain) { | |
570 | case LTTNG_DOMAIN_UST: | |
571 | { | |
572 | /* Disabling existing events */ | |
bec39940 DG |
573 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, |
574 | node.node) { | |
7f79d3a1 DG |
575 | if (uevent->enabled == 1) { |
576 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
577 | if (ret < 0) { | |
578 | continue; | |
579 | } | |
580 | uevent->enabled = 0; | |
581 | } | |
582 | } | |
583 | ||
584 | /* Get all UST available events */ | |
585 | size = ust_app_list_events(&events); | |
586 | if (size < 0) { | |
f73fabfd | 587 | ret = LTTNG_ERR_UST_LIST_FAIL; |
7f79d3a1 DG |
588 | goto error; |
589 | } | |
590 | ||
591 | for (i = 0; i < size; i++) { | |
592 | uevent = trace_ust_find_event_by_name(uchan->events, | |
593 | events[i].name); | |
594 | if (uevent != NULL && uevent->enabled == 1) { | |
595 | ret = ust_app_disable_event_pid(usess, uchan, uevent, | |
596 | events[i].pid); | |
597 | if (ret < 0 && ret != -EEXIST) { | |
f73fabfd | 598 | ret = LTTNG_ERR_UST_DISABLE_FAIL; |
7f79d3a1 DG |
599 | goto error; |
600 | } | |
601 | uevent->enabled = 0; | |
602 | continue; | |
603 | } | |
604 | } | |
605 | ||
606 | free(events); | |
607 | break; | |
608 | } | |
d78d6610 | 609 | #if 0 |
7f79d3a1 DG |
610 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
611 | case LTTNG_DOMAIN_UST_PID: | |
612 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 613 | #endif |
7f79d3a1 | 614 | default: |
f73fabfd | 615 | ret = LTTNG_ERR_UND; |
7f79d3a1 DG |
616 | goto error; |
617 | } | |
618 | ||
f73fabfd | 619 | return LTTNG_OK; |
7f79d3a1 DG |
620 | |
621 | error: | |
622 | free(events); | |
2bdd86d4 MD |
623 | return ret; |
624 | } |