Commit | Line | Data |
---|---|---|
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" |
be6a6276 | 30 | #include "lttng-sessiond.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 | |
025faf73 DG |
36 | /* |
37 | * Add unique UST event based on the event name, filter bytecode and loglevel. | |
38 | */ | |
18eace3b DG |
39 | static void add_unique_ust_event(struct lttng_ht *ht, |
40 | struct ltt_ust_event *event) | |
41 | { | |
42 | struct cds_lfht_node *node_ptr; | |
43 | struct ltt_ust_ht_key key; | |
44 | ||
45 | assert(ht); | |
46 | assert(ht->ht); | |
47 | assert(event); | |
48 | ||
49 | key.name = event->attr.name; | |
50 | key.filter = (struct lttng_filter_bytecode *) event->filter; | |
51 | key.loglevel = event->attr.loglevel; | |
4031e53e | 52 | key.exclusion = event->exclusion; |
18eace3b DG |
53 | |
54 | node_ptr = cds_lfht_add_unique(ht->ht, | |
55 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
56 | trace_ust_ht_match_event, &key, &event->node.node); | |
57 | assert(node_ptr == &event->node.node); | |
58 | } | |
59 | ||
54d01ffb | 60 | /* |
7a3d1328 | 61 | * Disable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 62 | */ |
d3a56674 DG |
63 | int event_kernel_disable_tracepoint(struct ltt_kernel_channel *kchan, |
64 | char *event_name) | |
54d01ffb DG |
65 | { |
66 | int ret; | |
67 | struct ltt_kernel_event *kevent; | |
68 | ||
0525e9ae DG |
69 | assert(kchan); |
70 | ||
54d01ffb DG |
71 | kevent = trace_kernel_get_event_by_name(event_name, kchan); |
72 | if (kevent == NULL) { | |
f73fabfd | 73 | ret = LTTNG_ERR_NO_EVENT; |
54d01ffb DG |
74 | goto error; |
75 | } | |
76 | ||
77 | ret = kernel_disable_event(kevent); | |
78 | if (ret < 0) { | |
f73fabfd | 79 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; |
54d01ffb DG |
80 | goto error; |
81 | } | |
82 | ||
83 | DBG("Kernel event %s disable for channel %s.", | |
84 | kevent->event->name, kchan->channel->name); | |
85 | ||
f73fabfd | 86 | ret = LTTNG_OK; |
54d01ffb DG |
87 | |
88 | error: | |
89 | return ret; | |
90 | } | |
91 | ||
6e911cad MD |
92 | /* |
93 | * Enable kernel system call for a channel from the kernel session. | |
94 | */ | |
95 | int event_kernel_enable_syscall(struct ltt_kernel_channel *kchan, | |
96 | char *syscall_name) | |
97 | { | |
98 | int ret; | |
99 | ||
100 | assert(kchan); | |
101 | ||
102 | ret = kernel_enable_syscall(syscall_name, kchan); | |
103 | if (ret < 0) { | |
104 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; | |
105 | goto error; | |
106 | } | |
107 | ||
108 | DBG("Kernel event %s enable for channel %s.", | |
109 | syscall_name, kchan->channel->name); | |
110 | ||
111 | ret = LTTNG_OK; | |
112 | ||
113 | error: | |
114 | return ret; | |
115 | } | |
116 | ||
117 | /* | |
118 | * Disable kernel system call for a channel from the kernel session. | |
119 | */ | |
120 | int event_kernel_disable_syscall(struct ltt_kernel_channel *kchan, | |
121 | char *syscall_name) | |
122 | { | |
123 | int ret; | |
124 | ||
125 | assert(kchan); | |
126 | ||
127 | ret = kernel_disable_syscall(syscall_name, kchan); | |
128 | if (ret < 0) { | |
129 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; | |
130 | goto error; | |
131 | } | |
132 | ||
133 | DBG("Kernel syscall %s disable for channel %s.", | |
134 | syscall_name[0] == '\0' ? "<all>" : syscall_name, | |
135 | kchan->channel->name); | |
136 | ||
137 | ret = LTTNG_OK; | |
138 | ||
139 | error: | |
140 | return ret; | |
141 | } | |
142 | ||
54d01ffb | 143 | /* |
7a3d1328 | 144 | * Disable kernel tracepoint events for a channel from the kernel session. |
54d01ffb | 145 | */ |
d3a56674 | 146 | int event_kernel_disable_all_tracepoints(struct ltt_kernel_channel *kchan) |
54d01ffb DG |
147 | { |
148 | int ret; | |
149 | struct ltt_kernel_event *kevent; | |
150 | ||
0525e9ae DG |
151 | assert(kchan); |
152 | ||
54d01ffb DG |
153 | /* For each event in the kernel session */ |
154 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
155 | ret = kernel_disable_event(kevent); | |
156 | if (ret < 0) { | |
157 | /* We continue disabling the rest */ | |
158 | continue; | |
159 | } | |
160 | } | |
f73fabfd | 161 | ret = LTTNG_OK; |
7a3d1328 MD |
162 | return ret; |
163 | } | |
164 | ||
7a3d1328 MD |
165 | /* |
166 | * Disable all kernel event for a channel from the kernel session. | |
167 | */ | |
d3a56674 | 168 | int event_kernel_disable_all(struct ltt_kernel_channel *kchan) |
7a3d1328 MD |
169 | { |
170 | int ret; | |
171 | ||
0525e9ae DG |
172 | assert(kchan); |
173 | ||
d3a56674 | 174 | ret = event_kernel_disable_all_tracepoints(kchan); |
f73fabfd | 175 | if (ret != LTTNG_OK) |
7a3d1328 | 176 | return ret; |
6e911cad | 177 | ret = event_kernel_disable_syscall(kchan, ""); |
54d01ffb DG |
178 | return ret; |
179 | } | |
180 | ||
181 | /* | |
7a3d1328 | 182 | * Enable kernel tracepoint event for a channel from the kernel session. |
faa9eb17 | 183 | * We own filter_expression and filter. |
54d01ffb | 184 | */ |
d3a56674 DG |
185 | int event_kernel_enable_tracepoint(struct ltt_kernel_channel *kchan, |
186 | struct lttng_event *event) | |
54d01ffb DG |
187 | { |
188 | int ret; | |
189 | struct ltt_kernel_event *kevent; | |
190 | ||
0525e9ae DG |
191 | assert(kchan); |
192 | assert(event); | |
193 | ||
54d01ffb DG |
194 | kevent = trace_kernel_get_event_by_name(event->name, kchan); |
195 | if (kevent == NULL) { | |
196 | ret = kernel_create_event(event, kchan); | |
197 | if (ret < 0) { | |
bd29c13d DG |
198 | switch (-ret) { |
199 | case EEXIST: | |
f73fabfd | 200 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
201 | break; |
202 | case ENOSYS: | |
f73fabfd | 203 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
204 | break; |
205 | default: | |
f73fabfd | 206 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 207 | break; |
d87bfb32 | 208 | } |
7a3d1328 | 209 | goto end; |
54d01ffb DG |
210 | } |
211 | } else if (kevent->enabled == 0) { | |
212 | ret = kernel_enable_event(kevent); | |
213 | if (ret < 0) { | |
f73fabfd | 214 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 215 | goto end; |
54d01ffb | 216 | } |
42224349 DG |
217 | } else { |
218 | /* At this point, the event is considered enabled */ | |
f73fabfd | 219 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 220 | goto end; |
54d01ffb | 221 | } |
42224349 | 222 | |
f73fabfd | 223 | ret = LTTNG_OK; |
7a3d1328 | 224 | end: |
54d01ffb DG |
225 | return ret; |
226 | } | |
227 | ||
228 | /* | |
7a3d1328 | 229 | * Enable all kernel tracepoint events of a channel of the kernel session. |
54d01ffb | 230 | */ |
d3a56674 DG |
231 | int event_kernel_enable_all_tracepoints(struct ltt_kernel_channel *kchan, |
232 | int kernel_tracer_fd) | |
54d01ffb DG |
233 | { |
234 | int size, i, ret; | |
235 | struct ltt_kernel_event *kevent; | |
8f69e5eb | 236 | struct lttng_event *event_list = NULL; |
54d01ffb | 237 | |
0525e9ae DG |
238 | assert(kchan); |
239 | ||
54d01ffb DG |
240 | /* For each event in the kernel session */ |
241 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
8f69e5eb DG |
242 | if (kevent->enabled == 0) { |
243 | ret = kernel_enable_event(kevent); | |
244 | if (ret < 0) { | |
245 | /* Enable failed but still continue */ | |
246 | continue; | |
247 | } | |
54d01ffb DG |
248 | } |
249 | } | |
250 | ||
251 | size = kernel_list_events(kernel_tracer_fd, &event_list); | |
252 | if (size < 0) { | |
f73fabfd | 253 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
7a3d1328 | 254 | goto end; |
54d01ffb DG |
255 | } |
256 | ||
257 | for (i = 0; i < size; i++) { | |
258 | kevent = trace_kernel_get_event_by_name(event_list[i].name, kchan); | |
259 | if (kevent == NULL) { | |
260 | /* Default event type for enable all */ | |
261 | event_list[i].type = LTTNG_EVENT_TRACEPOINT; | |
262 | /* Enable each single tracepoint event */ | |
263 | ret = kernel_create_event(&event_list[i], kchan); | |
264 | if (ret < 0) { | |
265 | /* Ignore error here and continue */ | |
266 | } | |
267 | } | |
268 | } | |
54d01ffb | 269 | free(event_list); |
8f69e5eb | 270 | |
f73fabfd | 271 | ret = LTTNG_OK; |
7a3d1328 | 272 | end: |
54d01ffb DG |
273 | return ret; |
274 | } | |
8c9ae521 | 275 | |
7a3d1328 MD |
276 | /* |
277 | * Enable all kernel events of a channel of the kernel session. | |
278 | */ | |
d3a56674 DG |
279 | int event_kernel_enable_all(struct ltt_kernel_channel *kchan, |
280 | int kernel_tracer_fd) | |
7a3d1328 | 281 | { |
6bd8707a | 282 | int tp_ret; |
7a3d1328 | 283 | |
0525e9ae DG |
284 | assert(kchan); |
285 | ||
d3a56674 | 286 | tp_ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
f73fabfd | 287 | if (tp_ret != LTTNG_OK) { |
7a3d1328 MD |
288 | goto end; |
289 | } | |
bd29c13d DG |
290 | |
291 | /* | |
292 | * Reaching this code path means that all tracepoints were enabled without | |
293 | * errors so we ignore the error value of syscalls. | |
294 | * | |
295 | * At the moment, failing to enable syscalls on "lttng enable-event -a -k" | |
296 | * is not considered an error that need to be returned to the client since | |
297 | * tracepoints did not fail. Future work will allow us to send back | |
298 | * multiple errors to the client in one API call. | |
299 | */ | |
6e911cad | 300 | (void) event_kernel_enable_syscall(kchan, ""); |
bd29c13d | 301 | |
7a3d1328 | 302 | end: |
bd29c13d | 303 | return tp_ret; |
8c9ae521 | 304 | } |
2bdd86d4 | 305 | |
7f79d3a1 DG |
306 | /* |
307 | * ============================ | |
308 | * UST : The Ultimate Frontier! | |
309 | * ============================ | |
310 | */ | |
311 | ||
76d45b40 DG |
312 | /* |
313 | * Enable all UST tracepoints for a channel from a UST session. | |
314 | */ | |
7972aab2 | 315 | int event_ust_enable_all_tracepoints(struct ltt_ust_session *usess, |
6b453b5e JG |
316 | struct ltt_ust_channel *uchan, |
317 | char *filter_expression, | |
318 | struct lttng_filter_bytecode *filter) | |
76d45b40 | 319 | { |
6775595e | 320 | int ret, i, size; |
bec39940 | 321 | struct lttng_ht_iter iter; |
76d45b40 | 322 | struct ltt_ust_event *uevent = NULL; |
7f79d3a1 | 323 | struct lttng_event *events = NULL; |
76d45b40 | 324 | |
0525e9ae DG |
325 | assert(usess); |
326 | assert(uchan); | |
327 | ||
025faf73 DG |
328 | rcu_read_lock(); |
329 | ||
7972aab2 DG |
330 | /* Enable existing events */ |
331 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
332 | node.node) { | |
333 | if (uevent->enabled == 0) { | |
334 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
335 | if (ret < 0) { | |
76d45b40 DG |
336 | continue; |
337 | } | |
7972aab2 DG |
338 | uevent->enabled = 1; |
339 | } | |
340 | } | |
76d45b40 | 341 | |
7972aab2 DG |
342 | /* Get all UST available events */ |
343 | size = ust_app_list_events(&events); | |
344 | if (size < 0) { | |
345 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
346 | goto error; | |
347 | } | |
76d45b40 | 348 | |
7972aab2 DG |
349 | for (i = 0; i < size; i++) { |
350 | /* | |
351 | * Check if event exist and if so, continue since it was enable | |
352 | * previously. | |
353 | */ | |
354 | uevent = trace_ust_find_event(uchan->events, events[i].name, filter, | |
10646003 | 355 | events[i].loglevel, NULL); |
7972aab2 | 356 | if (uevent != NULL) { |
76d45b40 DG |
357 | ret = ust_app_enable_event_pid(usess, uchan, uevent, |
358 | events[i].pid); | |
359 | if (ret < 0) { | |
7972aab2 | 360 | if (ret != -LTTNG_UST_ERR_EXIST) { |
f73fabfd | 361 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
7972aab2 | 362 | goto error; |
76d45b40 | 363 | } |
76d45b40 | 364 | } |
7972aab2 DG |
365 | continue; |
366 | } | |
76d45b40 | 367 | |
7972aab2 | 368 | /* Create ust event */ |
6b453b5e JG |
369 | uevent = trace_ust_create_event(&events[i], filter_expression, |
370 | filter, NULL); | |
7972aab2 DG |
371 | if (uevent == NULL) { |
372 | ret = LTTNG_ERR_FATAL; | |
373 | goto error_destroy; | |
76d45b40 DG |
374 | } |
375 | ||
7972aab2 DG |
376 | /* Create event for the specific PID */ |
377 | ret = ust_app_enable_event_pid(usess, uchan, uevent, | |
378 | events[i].pid); | |
379 | if (ret < 0) { | |
380 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
381 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
382 | goto error; | |
383 | } else { | |
384 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
385 | goto error_destroy; | |
386 | } | |
387 | } | |
388 | ||
389 | uevent->enabled = 1; | |
390 | /* Add ltt ust event to channel */ | |
391 | rcu_read_lock(); | |
392 | add_unique_ust_event(uchan->events, uevent); | |
393 | rcu_read_unlock(); | |
76d45b40 | 394 | } |
7972aab2 | 395 | free(events); |
76d45b40 | 396 | |
025faf73 | 397 | rcu_read_unlock(); |
f73fabfd | 398 | return LTTNG_OK; |
76d45b40 | 399 | |
7f79d3a1 | 400 | error_destroy: |
76d45b40 | 401 | trace_ust_destroy_event(uevent); |
7f79d3a1 DG |
402 | |
403 | error: | |
404 | free(events); | |
025faf73 | 405 | rcu_read_unlock(); |
76d45b40 DG |
406 | return ret; |
407 | } | |
408 | ||
2bdd86d4 MD |
409 | /* |
410 | * Enable UST tracepoint event for a channel from a UST session. | |
faa9eb17 | 411 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 412 | */ |
7972aab2 | 413 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 414 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 415 | char *filter_expression, |
f1613f52 JI |
416 | struct lttng_filter_bytecode *filter, |
417 | struct lttng_event_exclusion *exclusion) | |
2bdd86d4 | 418 | { |
f73fabfd | 419 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
420 | struct ltt_ust_event *uevent; |
421 | ||
0525e9ae DG |
422 | assert(usess); |
423 | assert(uchan); | |
424 | assert(event); | |
425 | ||
18eace3b DG |
426 | rcu_read_lock(); |
427 | ||
025faf73 | 428 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
10646003 | 429 | event->loglevel, exclusion); |
edb67388 | 430 | if (uevent == NULL) { |
6b453b5e JG |
431 | uevent = trace_ust_create_event(event, filter_expression, |
432 | filter, exclusion); | |
faa9eb17 MD |
433 | /* We have passed ownership */ |
434 | filter_expression = NULL; | |
435 | filter = NULL; | |
436 | exclusion = NULL; | |
edb67388 | 437 | if (uevent == NULL) { |
95a82664 | 438 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
439 | goto error; |
440 | } | |
025faf73 | 441 | |
fc34caaa | 442 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
443 | to_create = 1; |
444 | } | |
2bdd86d4 | 445 | |
7f79d3a1 DG |
446 | if (uevent->enabled) { |
447 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 448 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
449 | goto end; |
450 | } | |
451 | ||
fc34caaa DG |
452 | uevent->enabled = 1; |
453 | ||
7972aab2 DG |
454 | if (to_create) { |
455 | /* Create event on all UST registered apps for session */ | |
456 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
457 | } else { | |
458 | /* Enable event on all UST registered apps for session */ | |
459 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
460 | } | |
48842b30 | 461 | |
7972aab2 DG |
462 | if (ret < 0) { |
463 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
464 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
465 | goto end; | |
466 | } else { | |
467 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
468 | goto error; | |
edb67388 | 469 | } |
2bdd86d4 | 470 | } |
48842b30 | 471 | |
7f79d3a1 | 472 | if (to_create) { |
fc34caaa | 473 | /* Add ltt ust event to channel */ |
18eace3b | 474 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 475 | } |
edb67388 | 476 | |
7f79d3a1 DG |
477 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
478 | to_create ? "created" : "enabled", uchan->name); | |
479 | ||
f73fabfd | 480 | ret = LTTNG_OK; |
fc34caaa | 481 | |
fb89d070 | 482 | end: |
18eace3b | 483 | rcu_read_unlock(); |
faa9eb17 MD |
484 | free(filter_expression); |
485 | free(filter); | |
486 | free(exclusion); | |
fc34caaa | 487 | return ret; |
edb67388 DG |
488 | |
489 | error: | |
fc34caaa DG |
490 | /* |
491 | * Only destroy event on creation time (not enabling time) because if the | |
492 | * event is found in the channel (to_create == 0), it means that at some | |
493 | * point the enable_event worked and it's thus valid to keep it alive. | |
494 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
495 | * everyone up. | |
496 | */ | |
497 | if (to_create) { | |
498 | /* In this code path, the uevent was not added to the hash table */ | |
499 | trace_ust_destroy_event(uevent); | |
500 | } | |
18eace3b | 501 | rcu_read_unlock(); |
faa9eb17 MD |
502 | free(filter_expression); |
503 | free(filter); | |
504 | free(exclusion); | |
2bdd86d4 MD |
505 | return ret; |
506 | } | |
507 | ||
7f79d3a1 DG |
508 | /* |
509 | * Disable UST tracepoint of a channel from a UST session. | |
510 | */ | |
7972aab2 | 511 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 512 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
513 | { |
514 | int ret; | |
7f79d3a1 | 515 | struct ltt_ust_event *uevent; |
18eace3b DG |
516 | struct lttng_ht_node_str *node; |
517 | struct lttng_ht_iter iter; | |
18eace3b | 518 | struct lttng_ht *ht; |
2bdd86d4 | 519 | |
0525e9ae DG |
520 | assert(usess); |
521 | assert(uchan); | |
522 | assert(event_name); | |
523 | ||
18eace3b DG |
524 | ht = uchan->events; |
525 | ||
18eace3b | 526 | rcu_read_lock(); |
025faf73 DG |
527 | |
528 | /* | |
529 | * We use a custom lookup since we need the iterator for the next_duplicate | |
530 | * call in the do while loop below. | |
531 | */ | |
532 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
533 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
534 | node = lttng_ht_iter_get_node_str(&iter); |
535 | if (node == NULL) { | |
536 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 537 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 538 | goto error; |
2bdd86d4 | 539 | } |
7f79d3a1 | 540 | |
18eace3b DG |
541 | do { |
542 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
543 | assert(uevent); |
544 | ||
18eace3b DG |
545 | if (uevent->enabled == 0) { |
546 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 547 | goto next; |
7f79d3a1 | 548 | } |
18eace3b | 549 | |
7972aab2 DG |
550 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
551 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
552 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
553 | goto error; |
554 | } | |
18eace3b DG |
555 | uevent->enabled = 0; |
556 | ||
025faf73 DG |
557 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
558 | uchan->name); | |
559 | ||
a1dcaf0f | 560 | next: |
18eace3b DG |
561 | /* Get next duplicate event by name. */ |
562 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
563 | event_name, &iter.iter); | |
564 | node = lttng_ht_iter_get_node_str(&iter); | |
565 | } while (node); | |
7f79d3a1 | 566 | |
f73fabfd | 567 | ret = LTTNG_OK; |
7f79d3a1 | 568 | |
7f79d3a1 | 569 | error: |
18eace3b | 570 | rcu_read_unlock(); |
7f79d3a1 DG |
571 | return ret; |
572 | } | |
573 | ||
574 | /* | |
575 | * Disable all UST tracepoints for a channel from a UST session. | |
576 | */ | |
7972aab2 | 577 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, |
7f79d3a1 DG |
578 | struct ltt_ust_channel *uchan) |
579 | { | |
6775595e | 580 | int ret, i, size; |
bec39940 | 581 | struct lttng_ht_iter iter; |
7f79d3a1 DG |
582 | struct ltt_ust_event *uevent = NULL; |
583 | struct lttng_event *events = NULL; | |
584 | ||
0525e9ae DG |
585 | assert(usess); |
586 | assert(uchan); | |
587 | ||
025faf73 DG |
588 | rcu_read_lock(); |
589 | ||
7972aab2 DG |
590 | /* Disabling existing events */ |
591 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
592 | node.node) { | |
593 | if (uevent->enabled == 1) { | |
594 | ret = event_ust_disable_tracepoint(usess, uchan, | |
595 | uevent->attr.name); | |
596 | if (ret < 0) { | |
7f79d3a1 DG |
597 | continue; |
598 | } | |
599 | } | |
7f79d3a1 | 600 | } |
7972aab2 DG |
601 | |
602 | /* Get all UST available events */ | |
603 | size = ust_app_list_events(&events); | |
604 | if (size < 0) { | |
605 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
7f79d3a1 DG |
606 | goto error; |
607 | } | |
608 | ||
7972aab2 DG |
609 | for (i = 0; i < size; i++) { |
610 | ret = event_ust_disable_tracepoint(usess, uchan, | |
611 | events[i].name); | |
612 | if (ret != LTTNG_OK) { | |
613 | /* Continue to disable the rest... */ | |
614 | continue; | |
615 | } | |
616 | } | |
617 | free(events); | |
618 | ||
025faf73 | 619 | rcu_read_unlock(); |
f73fabfd | 620 | return LTTNG_OK; |
7f79d3a1 DG |
621 | |
622 | error: | |
623 | free(events); | |
025faf73 | 624 | rcu_read_unlock(); |
2bdd86d4 MD |
625 | return ret; |
626 | } | |
f20baf8e DG |
627 | |
628 | /* | |
022d91ba | 629 | * Enable all agent event for a given UST session. |
f20baf8e DG |
630 | * |
631 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
632 | */ | |
022d91ba | 633 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b DG |
634 | struct agent *agt, struct lttng_event *event, |
635 | struct lttng_filter_bytecode *filter) | |
f20baf8e DG |
636 | { |
637 | int ret; | |
fefd409b | 638 | struct agent_event *aevent; |
f20baf8e DG |
639 | struct lttng_ht_iter iter; |
640 | ||
641 | assert(usess); | |
642 | ||
022d91ba | 643 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 644 | |
022d91ba | 645 | /* Enable event on agent application through TCP socket. */ |
fefd409b | 646 | ret = event_agent_enable(usess, agt, event, filter); |
f20baf8e DG |
647 | if (ret != LTTNG_OK) { |
648 | goto error; | |
649 | } | |
650 | ||
651 | /* Flag every event that they are now enabled. */ | |
652 | rcu_read_lock(); | |
fefd409b | 653 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 654 | node.node) { |
fefd409b | 655 | aevent->enabled = 1; |
f20baf8e DG |
656 | } |
657 | rcu_read_unlock(); | |
658 | ||
659 | ret = LTTNG_OK; | |
660 | ||
661 | error: | |
662 | return ret; | |
663 | } | |
664 | ||
665 | /* | |
022d91ba | 666 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
667 | * |
668 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
669 | */ | |
fefd409b DG |
670 | int event_agent_enable(struct ltt_ust_session *usess, |
671 | struct agent *agt, struct lttng_event *event, | |
be6a6276 | 672 | struct lttng_filter_bytecode *filter) |
f20baf8e DG |
673 | { |
674 | int ret, created = 0; | |
fefd409b | 675 | struct agent_event *aevent; |
f20baf8e DG |
676 | |
677 | assert(usess); | |
678 | assert(event); | |
fefd409b | 679 | assert(agt); |
f20baf8e | 680 | |
022d91ba | 681 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
b2064f54 DG |
682 | "and loglevel %d", event->name, usess->id, event->loglevel_type, |
683 | event->loglevel); | |
f20baf8e | 684 | |
fefd409b DG |
685 | aevent = agent_find_event(event->name, event->loglevel, agt); |
686 | if (!aevent) { | |
687 | aevent = agent_create_event(event->name, filter); | |
688 | if (!aevent) { | |
f20baf8e DG |
689 | ret = LTTNG_ERR_NOMEM; |
690 | goto error; | |
691 | } | |
fefd409b DG |
692 | aevent->loglevel = event->loglevel; |
693 | aevent->loglevel_type = event->loglevel_type; | |
f20baf8e DG |
694 | created = 1; |
695 | } | |
696 | ||
697 | /* Already enabled? */ | |
fefd409b | 698 | if (aevent->enabled) { |
f20baf8e DG |
699 | goto end; |
700 | } | |
701 | ||
fefd409b | 702 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
703 | if (ret != LTTNG_OK) { |
704 | goto error; | |
705 | } | |
706 | ||
707 | /* If the event was created prior to the enable, add it to the domain. */ | |
708 | if (created) { | |
fefd409b | 709 | agent_add_event(aevent, agt); |
f20baf8e DG |
710 | } |
711 | ||
712 | end: | |
713 | return LTTNG_OK; | |
714 | ||
715 | error: | |
716 | if (created) { | |
fefd409b | 717 | agent_destroy_event(aevent); |
f20baf8e DG |
718 | } |
719 | return ret; | |
720 | } | |
721 | ||
da6c3a50 DG |
722 | /* |
723 | * Return the agent default event name to use by testing if the process is root | |
724 | * or not. Return NULL on error. | |
725 | */ | |
726 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
727 | { | |
728 | const char *default_event_name = NULL; | |
729 | ||
730 | if (domain == LTTNG_DOMAIN_JUL) { | |
731 | if (is_root) { | |
732 | default_event_name = DEFAULT_SYS_JUL_EVENT_NAME; | |
733 | } else { | |
734 | default_event_name = DEFAULT_USER_JUL_EVENT_NAME; | |
735 | } | |
736 | } else if (domain == LTTNG_DOMAIN_LOG4J) { | |
737 | if (is_root) { | |
738 | default_event_name = DEFAULT_SYS_LOG4J_EVENT_NAME; | |
739 | } else { | |
740 | default_event_name = DEFAULT_USER_LOG4J_EVENT_NAME; | |
741 | } | |
742 | } else { | |
743 | assert(0); | |
744 | } | |
745 | ||
746 | return default_event_name; | |
747 | } | |
748 | ||
749 | ||
f20baf8e | 750 | /* |
022d91ba | 751 | * Disable a single agent event for a given UST session. |
f20baf8e DG |
752 | * |
753 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
754 | */ | |
fefd409b DG |
755 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, |
756 | char *event_name) | |
f20baf8e DG |
757 | { |
758 | int ret; | |
fefd409b | 759 | struct agent_event *aevent; |
be6a6276 DG |
760 | struct ltt_ust_event *uevent = NULL; |
761 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 762 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 763 | |
fefd409b | 764 | assert(agt); |
f20baf8e DG |
765 | assert(usess); |
766 | assert(event_name); | |
767 | ||
022d91ba | 768 | DBG("Event agent disabling %s for session %" PRIu64, event_name, usess->id); |
f20baf8e | 769 | |
fefd409b DG |
770 | aevent = agent_find_event_by_name(event_name, agt); |
771 | if (!aevent) { | |
f20baf8e DG |
772 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
773 | goto error; | |
774 | } | |
775 | ||
776 | /* Already disabled? */ | |
fefd409b | 777 | if (!aevent->enabled) { |
f20baf8e DG |
778 | goto end; |
779 | } | |
780 | ||
71aecbf8 DG |
781 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
782 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
783 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
784 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
785 | } else { | |
786 | ret = LTTNG_ERR_INVALID; | |
787 | goto error; | |
788 | } | |
789 | ||
be6a6276 DG |
790 | /* |
791 | * Disable it on the UST side. First get the channel reference then find | |
792 | * the event and finally disable it. | |
793 | */ | |
794 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 795 | (char *) ust_channel_name); |
be6a6276 DG |
796 | if (!uchan) { |
797 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
798 | goto error; | |
799 | } | |
800 | ||
da6c3a50 DG |
801 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
802 | if (!ust_event_name) { | |
803 | ret = LTTNG_ERR_FATAL; | |
804 | goto error; | |
be6a6276 DG |
805 | } |
806 | ||
807 | /* | |
022d91ba | 808 | * The loglevel is hardcoded with 0 here since the agent ust event is set |
be6a6276 | 809 | * with the loglevel type to ALL thus the loglevel stays 0. The event's |
022d91ba | 810 | * filter is the one handling the loglevel for agent. |
be6a6276 | 811 | */ |
da6c3a50 | 812 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
fefd409b | 813 | aevent->filter, 0, NULL); |
022d91ba | 814 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
815 | assert(uevent); |
816 | ||
817 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
818 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
819 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
820 | goto error; | |
821 | } | |
822 | ||
0dcfcf94 DG |
823 | /* |
824 | * Flag event that it's disabled so the shadow copy on the ust app side | |
825 | * will disable it if an application shows up. | |
826 | */ | |
827 | uevent->enabled = 0; | |
828 | ||
fefd409b | 829 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
830 | if (ret != LTTNG_OK) { |
831 | goto error; | |
832 | } | |
833 | ||
834 | end: | |
835 | return LTTNG_OK; | |
836 | ||
837 | error: | |
838 | return ret; | |
839 | } | |
840 | /* | |
022d91ba | 841 | * Disable all agent event for a given UST session. |
f20baf8e DG |
842 | * |
843 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
844 | */ | |
fefd409b DG |
845 | int event_agent_disable_all(struct ltt_ust_session *usess, |
846 | struct agent *agt) | |
f20baf8e | 847 | { |
0dcfcf94 | 848 | int ret; |
fefd409b | 849 | struct agent_event *aevent; |
f20baf8e DG |
850 | struct lttng_ht_iter iter; |
851 | ||
fefd409b | 852 | assert(agt); |
f20baf8e DG |
853 | assert(usess); |
854 | ||
0dcfcf94 DG |
855 | /* |
856 | * Disable event on agent application. Continue to disable all other events | |
857 | * if the * event is not found. | |
858 | */ | |
fefd409b | 859 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
860 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
861 | goto error; | |
f20baf8e DG |
862 | } |
863 | ||
864 | /* Flag every event that they are now enabled. */ | |
865 | rcu_read_lock(); | |
fefd409b | 866 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 867 | node.node) { |
0dcfcf94 DG |
868 | if (!aevent->enabled) { |
869 | continue; | |
870 | } | |
871 | ||
872 | ret = event_agent_disable(usess, agt, aevent->name); | |
873 | if (ret != LTTNG_OK) { | |
874 | rcu_read_unlock(); | |
875 | goto error; | |
f20baf8e | 876 | } |
f20baf8e DG |
877 | } |
878 | rcu_read_unlock(); | |
879 | ||
880 | ret = LTTNG_OK; | |
881 | ||
882 | error: | |
883 | return ret; | |
884 | } |