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 | |
025faf73 DG |
35 | /* |
36 | * Add unique UST event based on the event name, filter bytecode and loglevel. | |
37 | */ | |
18eace3b DG |
38 | static void add_unique_ust_event(struct lttng_ht *ht, |
39 | struct ltt_ust_event *event) | |
40 | { | |
41 | struct cds_lfht_node *node_ptr; | |
42 | struct ltt_ust_ht_key key; | |
43 | ||
44 | assert(ht); | |
45 | assert(ht->ht); | |
46 | assert(event); | |
47 | ||
48 | key.name = event->attr.name; | |
49 | key.filter = (struct lttng_filter_bytecode *) event->filter; | |
50 | key.loglevel = event->attr.loglevel; | |
4031e53e | 51 | key.exclusion = event->exclusion; |
18eace3b DG |
52 | |
53 | node_ptr = cds_lfht_add_unique(ht->ht, | |
54 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
55 | trace_ust_ht_match_event, &key, &event->node.node); | |
56 | assert(node_ptr == &event->node.node); | |
57 | } | |
58 | ||
8c9ae521 DG |
59 | /* |
60 | * Setup a lttng_event used to enable *all* syscall tracing. | |
61 | */ | |
62 | static void init_syscalls_kernel_event(struct lttng_event *event) | |
63 | { | |
0525e9ae DG |
64 | assert(event); |
65 | ||
8c9ae521 DG |
66 | event->name[0] = '\0'; |
67 | /* | |
68 | * We use LTTNG_EVENT* here since the trace kernel creation will make the | |
69 | * right changes for the kernel. | |
70 | */ | |
71 | event->type = LTTNG_EVENT_SYSCALL; | |
72 | } | |
73 | ||
54d01ffb | 74 | /* |
7a3d1328 | 75 | * Disable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 76 | */ |
d3a56674 DG |
77 | int event_kernel_disable_tracepoint(struct ltt_kernel_channel *kchan, |
78 | char *event_name) | |
54d01ffb DG |
79 | { |
80 | int ret; | |
81 | struct ltt_kernel_event *kevent; | |
82 | ||
0525e9ae DG |
83 | assert(kchan); |
84 | ||
54d01ffb DG |
85 | kevent = trace_kernel_get_event_by_name(event_name, kchan); |
86 | if (kevent == NULL) { | |
f73fabfd | 87 | ret = LTTNG_ERR_NO_EVENT; |
54d01ffb DG |
88 | goto error; |
89 | } | |
90 | ||
91 | ret = kernel_disable_event(kevent); | |
92 | if (ret < 0) { | |
f73fabfd | 93 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; |
54d01ffb DG |
94 | goto error; |
95 | } | |
96 | ||
97 | DBG("Kernel event %s disable for channel %s.", | |
98 | kevent->event->name, kchan->channel->name); | |
99 | ||
f73fabfd | 100 | ret = LTTNG_OK; |
54d01ffb DG |
101 | |
102 | error: | |
103 | return ret; | |
104 | } | |
105 | ||
106 | /* | |
7a3d1328 | 107 | * Disable kernel tracepoint events for a channel from the kernel session. |
54d01ffb | 108 | */ |
d3a56674 | 109 | int event_kernel_disable_all_tracepoints(struct ltt_kernel_channel *kchan) |
54d01ffb DG |
110 | { |
111 | int ret; | |
112 | struct ltt_kernel_event *kevent; | |
113 | ||
0525e9ae DG |
114 | assert(kchan); |
115 | ||
54d01ffb DG |
116 | /* For each event in the kernel session */ |
117 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
118 | ret = kernel_disable_event(kevent); | |
119 | if (ret < 0) { | |
120 | /* We continue disabling the rest */ | |
121 | continue; | |
122 | } | |
123 | } | |
f73fabfd | 124 | ret = LTTNG_OK; |
7a3d1328 MD |
125 | return ret; |
126 | } | |
127 | ||
128 | /* | |
129 | * Disable kernel syscall events for a channel from the kernel session. | |
130 | */ | |
d3a56674 | 131 | int event_kernel_disable_all_syscalls(struct ltt_kernel_channel *kchan) |
7a3d1328 MD |
132 | { |
133 | ERR("Cannot disable syscall tracing for existing session. Please destroy session instead."); | |
f73fabfd | 134 | return LTTNG_OK; /* Return OK so disable all succeeds */ |
7a3d1328 | 135 | } |
54d01ffb | 136 | |
7a3d1328 MD |
137 | /* |
138 | * Disable all kernel event for a channel from the kernel session. | |
139 | */ | |
d3a56674 | 140 | int event_kernel_disable_all(struct ltt_kernel_channel *kchan) |
7a3d1328 MD |
141 | { |
142 | int ret; | |
143 | ||
0525e9ae DG |
144 | assert(kchan); |
145 | ||
d3a56674 | 146 | ret = event_kernel_disable_all_tracepoints(kchan); |
f73fabfd | 147 | if (ret != LTTNG_OK) |
7a3d1328 | 148 | return ret; |
d3a56674 | 149 | ret = event_kernel_disable_all_syscalls(kchan); |
54d01ffb DG |
150 | return ret; |
151 | } | |
152 | ||
153 | /* | |
7a3d1328 | 154 | * Enable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 155 | */ |
d3a56674 DG |
156 | int event_kernel_enable_tracepoint(struct ltt_kernel_channel *kchan, |
157 | struct lttng_event *event) | |
54d01ffb DG |
158 | { |
159 | int ret; | |
160 | struct ltt_kernel_event *kevent; | |
161 | ||
0525e9ae DG |
162 | assert(kchan); |
163 | assert(event); | |
164 | ||
54d01ffb DG |
165 | kevent = trace_kernel_get_event_by_name(event->name, kchan); |
166 | if (kevent == NULL) { | |
167 | ret = kernel_create_event(event, kchan); | |
168 | if (ret < 0) { | |
bd29c13d DG |
169 | switch (-ret) { |
170 | case EEXIST: | |
f73fabfd | 171 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
172 | break; |
173 | case ENOSYS: | |
f73fabfd | 174 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
175 | break; |
176 | default: | |
f73fabfd | 177 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 178 | break; |
d87bfb32 | 179 | } |
7a3d1328 | 180 | goto end; |
54d01ffb DG |
181 | } |
182 | } else if (kevent->enabled == 0) { | |
183 | ret = kernel_enable_event(kevent); | |
184 | if (ret < 0) { | |
f73fabfd | 185 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 186 | goto end; |
54d01ffb | 187 | } |
42224349 DG |
188 | } else { |
189 | /* At this point, the event is considered enabled */ | |
f73fabfd | 190 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 191 | goto end; |
54d01ffb | 192 | } |
42224349 | 193 | |
f73fabfd | 194 | ret = LTTNG_OK; |
7a3d1328 | 195 | end: |
54d01ffb DG |
196 | return ret; |
197 | } | |
198 | ||
199 | /* | |
7a3d1328 | 200 | * Enable all kernel tracepoint events of a channel of the kernel session. |
54d01ffb | 201 | */ |
d3a56674 DG |
202 | int event_kernel_enable_all_tracepoints(struct ltt_kernel_channel *kchan, |
203 | int kernel_tracer_fd) | |
54d01ffb DG |
204 | { |
205 | int size, i, ret; | |
206 | struct ltt_kernel_event *kevent; | |
8f69e5eb | 207 | struct lttng_event *event_list = NULL; |
54d01ffb | 208 | |
0525e9ae DG |
209 | assert(kchan); |
210 | ||
54d01ffb DG |
211 | /* For each event in the kernel session */ |
212 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
8f69e5eb DG |
213 | if (kevent->enabled == 0) { |
214 | ret = kernel_enable_event(kevent); | |
215 | if (ret < 0) { | |
216 | /* Enable failed but still continue */ | |
217 | continue; | |
218 | } | |
54d01ffb DG |
219 | } |
220 | } | |
221 | ||
222 | size = kernel_list_events(kernel_tracer_fd, &event_list); | |
223 | if (size < 0) { | |
f73fabfd | 224 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
7a3d1328 | 225 | goto end; |
54d01ffb DG |
226 | } |
227 | ||
228 | for (i = 0; i < size; i++) { | |
229 | kevent = trace_kernel_get_event_by_name(event_list[i].name, kchan); | |
230 | if (kevent == NULL) { | |
231 | /* Default event type for enable all */ | |
232 | event_list[i].type = LTTNG_EVENT_TRACEPOINT; | |
233 | /* Enable each single tracepoint event */ | |
234 | ret = kernel_create_event(&event_list[i], kchan); | |
235 | if (ret < 0) { | |
236 | /* Ignore error here and continue */ | |
237 | } | |
238 | } | |
239 | } | |
54d01ffb | 240 | free(event_list); |
8f69e5eb | 241 | |
f73fabfd | 242 | ret = LTTNG_OK; |
7a3d1328 | 243 | end: |
54d01ffb DG |
244 | return ret; |
245 | } | |
8c9ae521 DG |
246 | |
247 | /* | |
8b037137 | 248 | * Enable all kernel sycalls events of a channel of the kernel session. |
8c9ae521 | 249 | */ |
d3a56674 DG |
250 | int event_kernel_enable_all_syscalls(struct ltt_kernel_channel *kchan, |
251 | int kernel_tracer_fd) | |
8c9ae521 DG |
252 | { |
253 | int ret; | |
254 | struct lttng_event event; | |
255 | ||
0525e9ae DG |
256 | assert(kchan); |
257 | ||
8c9ae521 DG |
258 | init_syscalls_kernel_event(&event); |
259 | ||
260 | DBG("Enabling all syscall tracing"); | |
261 | ||
262 | ret = kernel_create_event(&event, kchan); | |
263 | if (ret < 0) { | |
8f69e5eb | 264 | if (ret == -EEXIST) { |
f73fabfd | 265 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
8f69e5eb | 266 | } else { |
f73fabfd | 267 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
8f69e5eb | 268 | } |
7a3d1328 | 269 | goto end; |
8c9ae521 | 270 | } |
8f69e5eb | 271 | |
f73fabfd | 272 | ret = LTTNG_OK; |
7a3d1328 MD |
273 | end: |
274 | return ret; | |
275 | } | |
8c9ae521 | 276 | |
7a3d1328 MD |
277 | /* |
278 | * Enable all kernel events of a channel of the kernel session. | |
279 | */ | |
d3a56674 DG |
280 | int event_kernel_enable_all(struct ltt_kernel_channel *kchan, |
281 | int kernel_tracer_fd) | |
7a3d1328 | 282 | { |
6bd8707a | 283 | int tp_ret; |
7a3d1328 | 284 | |
0525e9ae DG |
285 | assert(kchan); |
286 | ||
d3a56674 | 287 | tp_ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
f73fabfd | 288 | if (tp_ret != LTTNG_OK) { |
7a3d1328 MD |
289 | goto end; |
290 | } | |
bd29c13d DG |
291 | |
292 | /* | |
293 | * Reaching this code path means that all tracepoints were enabled without | |
294 | * errors so we ignore the error value of syscalls. | |
295 | * | |
296 | * At the moment, failing to enable syscalls on "lttng enable-event -a -k" | |
297 | * is not considered an error that need to be returned to the client since | |
298 | * tracepoints did not fail. Future work will allow us to send back | |
299 | * multiple errors to the client in one API call. | |
300 | */ | |
d3a56674 | 301 | (void) event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
bd29c13d | 302 | |
7a3d1328 | 303 | end: |
bd29c13d | 304 | return tp_ret; |
8c9ae521 | 305 | } |
2bdd86d4 | 306 | |
7f79d3a1 DG |
307 | /* |
308 | * ============================ | |
309 | * UST : The Ultimate Frontier! | |
310 | * ============================ | |
311 | */ | |
312 | ||
76d45b40 DG |
313 | /* |
314 | * Enable all UST tracepoints for a channel from a UST session. | |
315 | */ | |
7972aab2 | 316 | int event_ust_enable_all_tracepoints(struct ltt_ust_session *usess, |
025faf73 | 317 | struct ltt_ust_channel *uchan, struct lttng_filter_bytecode *filter) |
76d45b40 | 318 | { |
6775595e | 319 | int ret, i, size; |
bec39940 | 320 | struct lttng_ht_iter iter; |
76d45b40 | 321 | struct ltt_ust_event *uevent = NULL; |
7f79d3a1 | 322 | struct lttng_event *events = NULL; |
76d45b40 | 323 | |
0525e9ae DG |
324 | assert(usess); |
325 | assert(uchan); | |
326 | ||
025faf73 DG |
327 | rcu_read_lock(); |
328 | ||
7972aab2 DG |
329 | /* Enable existing events */ |
330 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
331 | node.node) { | |
332 | if (uevent->enabled == 0) { | |
333 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
334 | if (ret < 0) { | |
76d45b40 DG |
335 | continue; |
336 | } | |
7972aab2 DG |
337 | uevent->enabled = 1; |
338 | } | |
339 | } | |
76d45b40 | 340 | |
7972aab2 DG |
341 | /* Get all UST available events */ |
342 | size = ust_app_list_events(&events); | |
343 | if (size < 0) { | |
344 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
345 | goto error; | |
346 | } | |
76d45b40 | 347 | |
7972aab2 DG |
348 | for (i = 0; i < size; i++) { |
349 | /* | |
350 | * Check if event exist and if so, continue since it was enable | |
351 | * previously. | |
352 | */ | |
353 | uevent = trace_ust_find_event(uchan->events, events[i].name, filter, | |
10646003 | 354 | events[i].loglevel, NULL); |
7972aab2 | 355 | if (uevent != NULL) { |
76d45b40 DG |
356 | ret = ust_app_enable_event_pid(usess, uchan, uevent, |
357 | events[i].pid); | |
358 | if (ret < 0) { | |
7972aab2 | 359 | if (ret != -LTTNG_UST_ERR_EXIST) { |
f73fabfd | 360 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
7972aab2 | 361 | goto error; |
76d45b40 | 362 | } |
76d45b40 | 363 | } |
7972aab2 DG |
364 | continue; |
365 | } | |
76d45b40 | 366 | |
7972aab2 | 367 | /* Create ust event */ |
561c6897 | 368 | uevent = trace_ust_create_event(&events[i], filter, NULL); |
7972aab2 DG |
369 | if (uevent == NULL) { |
370 | ret = LTTNG_ERR_FATAL; | |
371 | goto error_destroy; | |
76d45b40 DG |
372 | } |
373 | ||
7972aab2 DG |
374 | /* Create event for the specific PID */ |
375 | ret = ust_app_enable_event_pid(usess, uchan, uevent, | |
376 | events[i].pid); | |
377 | if (ret < 0) { | |
378 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
379 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
380 | goto error; | |
381 | } else { | |
382 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
383 | goto error_destroy; | |
384 | } | |
385 | } | |
386 | ||
387 | uevent->enabled = 1; | |
388 | /* Add ltt ust event to channel */ | |
389 | rcu_read_lock(); | |
390 | add_unique_ust_event(uchan->events, uevent); | |
391 | rcu_read_unlock(); | |
76d45b40 | 392 | } |
7972aab2 | 393 | free(events); |
76d45b40 | 394 | |
025faf73 | 395 | rcu_read_unlock(); |
f73fabfd | 396 | return LTTNG_OK; |
76d45b40 | 397 | |
7f79d3a1 | 398 | error_destroy: |
76d45b40 | 399 | trace_ust_destroy_event(uevent); |
7f79d3a1 DG |
400 | |
401 | error: | |
402 | free(events); | |
025faf73 | 403 | rcu_read_unlock(); |
76d45b40 DG |
404 | return ret; |
405 | } | |
406 | ||
2bdd86d4 MD |
407 | /* |
408 | * Enable UST tracepoint event for a channel from a UST session. | |
409 | */ | |
7972aab2 | 410 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 411 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
f1613f52 JI |
412 | struct lttng_filter_bytecode *filter, |
413 | struct lttng_event_exclusion *exclusion) | |
2bdd86d4 | 414 | { |
f73fabfd | 415 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
416 | struct ltt_ust_event *uevent; |
417 | ||
0525e9ae DG |
418 | assert(usess); |
419 | assert(uchan); | |
420 | assert(event); | |
421 | ||
18eace3b DG |
422 | rcu_read_lock(); |
423 | ||
025faf73 | 424 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
10646003 | 425 | event->loglevel, exclusion); |
edb67388 | 426 | if (uevent == NULL) { |
561c6897 | 427 | uevent = trace_ust_create_event(event, filter, exclusion); |
edb67388 | 428 | if (uevent == NULL) { |
95a82664 | 429 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
430 | goto error; |
431 | } | |
025faf73 | 432 | |
fc34caaa | 433 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
434 | to_create = 1; |
435 | } | |
2bdd86d4 | 436 | |
7f79d3a1 DG |
437 | if (uevent->enabled) { |
438 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 439 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
440 | goto end; |
441 | } | |
442 | ||
fc34caaa DG |
443 | uevent->enabled = 1; |
444 | ||
7972aab2 DG |
445 | if (to_create) { |
446 | /* Create event on all UST registered apps for session */ | |
447 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
448 | } else { | |
449 | /* Enable event on all UST registered apps for session */ | |
450 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
451 | } | |
48842b30 | 452 | |
7972aab2 DG |
453 | if (ret < 0) { |
454 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
455 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
456 | goto end; | |
457 | } else { | |
458 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
459 | goto error; | |
edb67388 | 460 | } |
2bdd86d4 | 461 | } |
48842b30 | 462 | |
7f79d3a1 | 463 | if (to_create) { |
fc34caaa | 464 | /* Add ltt ust event to channel */ |
18eace3b | 465 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 466 | } |
edb67388 | 467 | |
7f79d3a1 DG |
468 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
469 | to_create ? "created" : "enabled", uchan->name); | |
470 | ||
f73fabfd | 471 | ret = LTTNG_OK; |
fc34caaa | 472 | |
fb89d070 | 473 | end: |
18eace3b | 474 | rcu_read_unlock(); |
fc34caaa | 475 | return ret; |
edb67388 DG |
476 | |
477 | error: | |
fc34caaa DG |
478 | /* |
479 | * Only destroy event on creation time (not enabling time) because if the | |
480 | * event is found in the channel (to_create == 0), it means that at some | |
481 | * point the enable_event worked and it's thus valid to keep it alive. | |
482 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
483 | * everyone up. | |
484 | */ | |
485 | if (to_create) { | |
486 | /* In this code path, the uevent was not added to the hash table */ | |
487 | trace_ust_destroy_event(uevent); | |
488 | } | |
18eace3b | 489 | rcu_read_unlock(); |
2bdd86d4 MD |
490 | return ret; |
491 | } | |
492 | ||
7f79d3a1 DG |
493 | /* |
494 | * Disable UST tracepoint of a channel from a UST session. | |
495 | */ | |
7972aab2 | 496 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 497 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
498 | { |
499 | int ret; | |
7f79d3a1 | 500 | struct ltt_ust_event *uevent; |
18eace3b DG |
501 | struct lttng_ht_node_str *node; |
502 | struct lttng_ht_iter iter; | |
18eace3b | 503 | struct lttng_ht *ht; |
2bdd86d4 | 504 | |
0525e9ae DG |
505 | assert(usess); |
506 | assert(uchan); | |
507 | assert(event_name); | |
508 | ||
18eace3b DG |
509 | ht = uchan->events; |
510 | ||
18eace3b | 511 | rcu_read_lock(); |
025faf73 DG |
512 | |
513 | /* | |
514 | * We use a custom lookup since we need the iterator for the next_duplicate | |
515 | * call in the do while loop below. | |
516 | */ | |
517 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
518 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
519 | node = lttng_ht_iter_get_node_str(&iter); |
520 | if (node == NULL) { | |
521 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 522 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 523 | goto error; |
2bdd86d4 | 524 | } |
7f79d3a1 | 525 | |
18eace3b DG |
526 | do { |
527 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
528 | assert(uevent); |
529 | ||
18eace3b DG |
530 | if (uevent->enabled == 0) { |
531 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 532 | goto next; |
7f79d3a1 | 533 | } |
18eace3b | 534 | |
7972aab2 DG |
535 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
536 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
537 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
538 | goto error; |
539 | } | |
18eace3b DG |
540 | uevent->enabled = 0; |
541 | ||
025faf73 DG |
542 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
543 | uchan->name); | |
544 | ||
a1dcaf0f | 545 | next: |
18eace3b DG |
546 | /* Get next duplicate event by name. */ |
547 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
548 | event_name, &iter.iter); | |
549 | node = lttng_ht_iter_get_node_str(&iter); | |
550 | } while (node); | |
7f79d3a1 | 551 | |
f73fabfd | 552 | ret = LTTNG_OK; |
7f79d3a1 | 553 | |
7f79d3a1 | 554 | error: |
18eace3b | 555 | rcu_read_unlock(); |
7f79d3a1 DG |
556 | return ret; |
557 | } | |
558 | ||
559 | /* | |
560 | * Disable all UST tracepoints for a channel from a UST session. | |
561 | */ | |
7972aab2 | 562 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, |
7f79d3a1 DG |
563 | struct ltt_ust_channel *uchan) |
564 | { | |
6775595e | 565 | int ret, i, size; |
bec39940 | 566 | struct lttng_ht_iter iter; |
7f79d3a1 DG |
567 | struct ltt_ust_event *uevent = NULL; |
568 | struct lttng_event *events = NULL; | |
569 | ||
0525e9ae DG |
570 | assert(usess); |
571 | assert(uchan); | |
572 | ||
025faf73 DG |
573 | rcu_read_lock(); |
574 | ||
7972aab2 DG |
575 | /* Disabling existing events */ |
576 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
577 | node.node) { | |
578 | if (uevent->enabled == 1) { | |
579 | ret = event_ust_disable_tracepoint(usess, uchan, | |
580 | uevent->attr.name); | |
581 | if (ret < 0) { | |
7f79d3a1 DG |
582 | continue; |
583 | } | |
584 | } | |
7f79d3a1 | 585 | } |
7972aab2 DG |
586 | |
587 | /* Get all UST available events */ | |
588 | size = ust_app_list_events(&events); | |
589 | if (size < 0) { | |
590 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
7f79d3a1 DG |
591 | goto error; |
592 | } | |
593 | ||
7972aab2 DG |
594 | for (i = 0; i < size; i++) { |
595 | ret = event_ust_disable_tracepoint(usess, uchan, | |
596 | events[i].name); | |
597 | if (ret != LTTNG_OK) { | |
598 | /* Continue to disable the rest... */ | |
599 | continue; | |
600 | } | |
601 | } | |
602 | free(events); | |
603 | ||
025faf73 | 604 | rcu_read_unlock(); |
f73fabfd | 605 | return LTTNG_OK; |
7f79d3a1 DG |
606 | |
607 | error: | |
608 | free(events); | |
025faf73 | 609 | rcu_read_unlock(); |
2bdd86d4 MD |
610 | return ret; |
611 | } | |
f20baf8e DG |
612 | |
613 | /* | |
614 | * Enable all JUL event for a given UST session. | |
615 | * | |
616 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
617 | */ | |
618 | int event_jul_enable_all(struct ltt_ust_session *usess) | |
619 | { | |
620 | int ret; | |
621 | struct jul_event *jevent; | |
622 | struct lttng_event event; | |
623 | struct lttng_ht_iter iter; | |
624 | ||
625 | assert(usess); | |
626 | ||
627 | DBG("Event JUL enabling ALL events for session %" PRIu64, usess->id); | |
628 | ||
629 | /* Create the * wildcard event name for the Java agent. */ | |
630 | memset(event.name, 0, sizeof(event.name)); | |
631 | strncpy(event.name, "*", sizeof(event.name)); | |
632 | event.name[sizeof(event.name) - 1] = '\0'; | |
633 | ||
634 | /* Enable event on JUL application through TCP socket. */ | |
635 | ret = event_jul_enable(usess, &event); | |
636 | if (ret != LTTNG_OK) { | |
637 | goto error; | |
638 | } | |
639 | ||
640 | /* Flag every event that they are now enabled. */ | |
641 | rcu_read_lock(); | |
642 | cds_lfht_for_each_entry(usess->domain_jul.events->ht, &iter.iter, jevent, | |
643 | node.node) { | |
644 | jevent->enabled = 1; | |
645 | } | |
646 | rcu_read_unlock(); | |
647 | ||
648 | ret = LTTNG_OK; | |
649 | ||
650 | error: | |
651 | return ret; | |
652 | } | |
653 | ||
654 | /* | |
655 | * Enable a single JUL event for a given UST session. | |
656 | * | |
657 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
658 | */ | |
659 | int event_jul_enable(struct ltt_ust_session *usess, struct lttng_event *event) | |
660 | { | |
661 | int ret, created = 0; | |
662 | struct jul_event *jevent; | |
663 | ||
664 | assert(usess); | |
665 | assert(event); | |
666 | ||
667 | DBG("Event JUL enabling %s for session %" PRIu64, event->name, usess->id); | |
668 | ||
669 | jevent = jul_find_by_name(event->name, &usess->domain_jul); | |
670 | if (!jevent) { | |
671 | jevent = jul_create_event(event->name); | |
672 | if (!jevent) { | |
673 | ret = LTTNG_ERR_NOMEM; | |
674 | goto error; | |
675 | } | |
676 | created = 1; | |
677 | } | |
678 | ||
679 | /* Already enabled? */ | |
680 | if (jevent->enabled) { | |
681 | goto end; | |
682 | } | |
683 | ||
684 | ret = jul_enable_event(jevent); | |
685 | if (ret != LTTNG_OK) { | |
686 | goto error; | |
687 | } | |
688 | ||
689 | /* If the event was created prior to the enable, add it to the domain. */ | |
690 | if (created) { | |
691 | jul_add_event(jevent, &usess->domain_jul); | |
692 | } | |
693 | ||
694 | end: | |
695 | return LTTNG_OK; | |
696 | ||
697 | error: | |
698 | if (created) { | |
699 | jul_destroy_event(jevent); | |
700 | } | |
701 | return ret; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Disable a single JUL event for a given UST session. | |
706 | * | |
707 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
708 | */ | |
709 | int event_jul_disable(struct ltt_ust_session *usess, char *event_name) | |
710 | { | |
711 | int ret; | |
712 | struct jul_event *jevent; | |
713 | ||
714 | assert(usess); | |
715 | assert(event_name); | |
716 | ||
717 | DBG("Event JUL disabling %s for session %" PRIu64, event_name, usess->id); | |
718 | ||
719 | jevent = jul_find_by_name(event_name, &usess->domain_jul); | |
720 | if (!jevent) { | |
721 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
722 | goto error; | |
723 | } | |
724 | ||
725 | /* Already disabled? */ | |
726 | if (!jevent->enabled) { | |
727 | goto end; | |
728 | } | |
729 | ||
730 | ret = jul_disable_event(jevent); | |
731 | if (ret != LTTNG_OK) { | |
732 | goto error; | |
733 | } | |
734 | ||
735 | end: | |
736 | return LTTNG_OK; | |
737 | ||
738 | error: | |
739 | return ret; | |
740 | } | |
741 | /* | |
742 | * Disable all JUL event for a given UST session. | |
743 | * | |
744 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
745 | */ | |
746 | int event_jul_disable_all(struct ltt_ust_session *usess) | |
747 | { | |
748 | int ret, do_disable = 0; | |
749 | struct jul_event *jevent; | |
750 | struct lttng_ht_iter iter; | |
751 | ||
752 | assert(usess); | |
753 | ||
754 | /* Enable event on JUL application through TCP socket. */ | |
755 | ret = event_jul_disable(usess, "*"); | |
756 | if (ret != LTTNG_OK) { | |
757 | if (ret == LTTNG_ERR_UST_EVENT_NOT_FOUND) { | |
758 | /* | |
759 | * This means that no enable all was done before but still a user | |
760 | * could want to disable everything even though the * wild card | |
761 | * event does not exists. | |
762 | */ | |
763 | do_disable = 1; | |
764 | } else { | |
765 | goto error; | |
766 | } | |
767 | } | |
768 | ||
769 | /* Flag every event that they are now enabled. */ | |
770 | rcu_read_lock(); | |
771 | cds_lfht_for_each_entry(usess->domain_jul.events->ht, &iter.iter, jevent, | |
772 | node.node) { | |
773 | if (jevent->enabled && do_disable) { | |
774 | ret = event_jul_disable(usess, jevent->name); | |
775 | if (ret != LTTNG_OK) { | |
776 | rcu_read_unlock(); | |
777 | goto error; | |
778 | } | |
779 | } | |
780 | jevent->enabled = 0; | |
781 | } | |
782 | rcu_read_unlock(); | |
783 | ||
784 | ret = LTTNG_OK; | |
785 | ||
786 | error: | |
787 | return ret; | |
788 | } |