Commit | Line | Data |
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f4681817 MD |
1 | /* |
2 | * lttng-ust-abi.c | |
3 | * | |
f4681817 MD |
4 | * LTTng UST ABI |
5 | * | |
e92f3e28 MD |
6 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
7 | * | |
8 | * This library is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; only | |
11 | * version 2.1 of the License. | |
12 | * | |
13 | * This library is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with this library; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | * | |
22 | * | |
f4681817 MD |
23 | * Mimic system calls for: |
24 | * - session creation, returns an object descriptor or failure. | |
25 | * - channel creation, returns an object descriptor or failure. | |
26 | * - Operates on a session object descriptor | |
27 | * - Takes all channel options as parameters. | |
28 | * - stream get, returns an object descriptor or failure. | |
29 | * - Operates on a channel object descriptor. | |
30 | * - stream notifier get, returns an object descriptor or failure. | |
31 | * - Operates on a channel object descriptor. | |
32 | * - event creation, returns an object descriptor or failure. | |
33 | * - Operates on a channel object descriptor | |
34 | * - Takes an event name as parameter | |
35 | * - Takes an instrumentation source as parameter | |
36 | * - e.g. tracepoints, dynamic_probes... | |
37 | * - Takes instrumentation source specific arguments. | |
f4681817 MD |
38 | */ |
39 | ||
4318ae1b | 40 | #include <lttng/ust-abi.h> |
f4681817 MD |
41 | #include <urcu/compiler.h> |
42 | #include <urcu/list.h> | |
4318ae1b | 43 | #include <lttng/ust-events.h> |
23c8854a | 44 | #include <lttng/ust-version.h> |
902e1379 | 45 | #include <lttng/tracepoint.h> |
d8de1354 | 46 | #include "tracepoint-internal.h" |
44c72f10 MD |
47 | #include <usterr-signal-safe.h> |
48 | #include <helper.h> | |
f4681817 | 49 | #include "ltt-tracer.h" |
4ab44fbe | 50 | |
45e9e699 MD |
51 | static int lttng_ust_abi_close_in_progress; |
52 | ||
51489cad MD |
53 | static |
54 | int lttng_abi_tracepoint_list(void); | |
06d4f27e MD |
55 | static |
56 | int lttng_abi_tracepoint_field_list(void); | |
51489cad | 57 | |
f4681817 MD |
58 | /* |
59 | * Object descriptor table. Should be protected from concurrent access | |
60 | * by the caller. | |
61 | */ | |
62 | ||
b61ce3b2 | 63 | struct lttng_ust_obj { |
f4681817 MD |
64 | union { |
65 | struct { | |
66 | void *private_data; | |
b61ce3b2 | 67 | const struct lttng_ust_objd_ops *ops; |
f4681817 MD |
68 | int f_count; |
69 | } s; | |
70 | int freelist_next; /* offset freelist. end is -1. */ | |
71 | } u; | |
72 | }; | |
73 | ||
b61ce3b2 MD |
74 | struct lttng_ust_objd_table { |
75 | struct lttng_ust_obj *array; | |
f4681817 MD |
76 | unsigned int len, allocated_len; |
77 | int freelist_head; /* offset freelist head. end is -1 */ | |
78 | }; | |
79 | ||
b61ce3b2 | 80 | static struct lttng_ust_objd_table objd_table = { |
f4681817 MD |
81 | .freelist_head = -1, |
82 | }; | |
83 | ||
84 | static | |
b61ce3b2 | 85 | int objd_alloc(void *private_data, const struct lttng_ust_objd_ops *ops) |
f4681817 | 86 | { |
b61ce3b2 | 87 | struct lttng_ust_obj *obj; |
f4681817 MD |
88 | |
89 | if (objd_table.freelist_head != -1) { | |
90 | obj = &objd_table.array[objd_table.freelist_head]; | |
91 | objd_table.freelist_head = obj->u.freelist_next; | |
92 | goto end; | |
93 | } | |
94 | ||
95 | if (objd_table.len >= objd_table.allocated_len) { | |
96 | unsigned int new_allocated_len, old_allocated_len; | |
b61ce3b2 | 97 | struct lttng_ust_obj *new_table, *old_table; |
f4681817 MD |
98 | |
99 | old_allocated_len = objd_table.allocated_len; | |
100 | old_table = objd_table.array; | |
101 | if (!old_allocated_len) | |
102 | new_allocated_len = 1; | |
103 | else | |
104 | new_allocated_len = old_allocated_len << 1; | |
b61ce3b2 | 105 | new_table = zmalloc(sizeof(struct lttng_ust_obj) * new_allocated_len); |
f4681817 MD |
106 | if (!new_table) |
107 | return -ENOMEM; | |
108 | memcpy(new_table, old_table, | |
b61ce3b2 | 109 | sizeof(struct lttng_ust_obj) * old_allocated_len); |
f4681817 MD |
110 | free(old_table); |
111 | objd_table.array = new_table; | |
112 | objd_table.allocated_len = new_allocated_len; | |
113 | } | |
114 | obj = &objd_table.array[objd_table.len]; | |
115 | objd_table.len++; | |
116 | end: | |
117 | obj->u.s.private_data = private_data; | |
118 | obj->u.s.ops = ops; | |
a4be8962 MD |
119 | obj->u.s.f_count = 2; /* count == 1 : object is allocated */ |
120 | /* count == 2 : allocated + hold ref */ | |
f4681817 MD |
121 | return obj - objd_table.array; |
122 | } | |
123 | ||
124 | static | |
b61ce3b2 | 125 | struct lttng_ust_obj *_objd_get(int id) |
f4681817 MD |
126 | { |
127 | if (id >= objd_table.len) | |
128 | return NULL; | |
a4be8962 MD |
129 | if (!objd_table.array[id].u.s.f_count) |
130 | return NULL; | |
f4681817 MD |
131 | return &objd_table.array[id]; |
132 | } | |
133 | ||
134 | static | |
135 | void *objd_private(int id) | |
136 | { | |
b61ce3b2 | 137 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
138 | assert(obj); |
139 | return obj->u.s.private_data; | |
140 | } | |
141 | ||
142 | static | |
143 | void objd_set_private(int id, void *private_data) | |
144 | { | |
b61ce3b2 | 145 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
146 | assert(obj); |
147 | obj->u.s.private_data = private_data; | |
148 | } | |
149 | ||
b61ce3b2 | 150 | const struct lttng_ust_objd_ops *objd_ops(int id) |
f4681817 | 151 | { |
b61ce3b2 | 152 | struct lttng_ust_obj *obj = _objd_get(id); |
46050b1a | 153 | |
a4be8962 MD |
154 | if (!obj) |
155 | return NULL; | |
f4681817 MD |
156 | return obj->u.s.ops; |
157 | } | |
158 | ||
159 | static | |
160 | void objd_free(int id) | |
161 | { | |
b61ce3b2 | 162 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
163 | |
164 | assert(obj); | |
165 | obj->u.freelist_next = objd_table.freelist_head; | |
166 | objd_table.freelist_head = obj - objd_table.array; | |
a4be8962 MD |
167 | assert(obj->u.s.f_count == 1); |
168 | obj->u.s.f_count = 0; /* deallocated */ | |
f4681817 MD |
169 | } |
170 | ||
171 | static | |
172 | void objd_ref(int id) | |
173 | { | |
b61ce3b2 | 174 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
175 | obj->u.s.f_count++; |
176 | } | |
177 | ||
d4419b81 | 178 | int lttng_ust_objd_unref(int id) |
f4681817 | 179 | { |
b61ce3b2 | 180 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 | 181 | |
1ea11eab MD |
182 | if (!obj) |
183 | return -EINVAL; | |
a4be8962 MD |
184 | if (obj->u.s.f_count == 1) { |
185 | ERR("Reference counting error\n"); | |
186 | return -EINVAL; | |
187 | } | |
188 | if ((--obj->u.s.f_count) == 1) { | |
b61ce3b2 | 189 | const struct lttng_ust_objd_ops *ops = objd_ops(id); |
a4be8962 | 190 | |
f4681817 MD |
191 | if (ops->release) |
192 | ops->release(id); | |
193 | objd_free(id); | |
194 | } | |
1ea11eab | 195 | return 0; |
f4681817 MD |
196 | } |
197 | ||
198 | static | |
199 | void objd_table_destroy(void) | |
200 | { | |
a4be8962 MD |
201 | int i; |
202 | ||
fb50c39d | 203 | for (i = 0; i < objd_table.allocated_len; i++) |
d4419b81 | 204 | (void) lttng_ust_objd_unref(i); |
f4681817 | 205 | free(objd_table.array); |
02fb3381 MD |
206 | objd_table.array = NULL; |
207 | objd_table.len = 0; | |
208 | objd_table.allocated_len = 0; | |
17dfb34b | 209 | objd_table.freelist_head = -1; |
f4681817 MD |
210 | } |
211 | ||
212 | /* | |
213 | * This is LTTng's own personal way to create an ABI for sessiond. | |
214 | * We send commands over a socket. | |
215 | */ | |
216 | ||
b61ce3b2 MD |
217 | static const struct lttng_ust_objd_ops lttng_ops; |
218 | static const struct lttng_ust_objd_ops lttng_session_ops; | |
219 | static const struct lttng_ust_objd_ops lttng_channel_ops; | |
220 | static const struct lttng_ust_objd_ops lttng_metadata_ops; | |
221 | static const struct lttng_ust_objd_ops lttng_event_ops; | |
e6c12e3d | 222 | static const struct lttng_ust_objd_ops lttng_wildcard_ops; |
b61ce3b2 | 223 | static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops; |
51489cad | 224 | static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops; |
06d4f27e | 225 | static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops; |
f4681817 MD |
226 | |
227 | enum channel_type { | |
228 | PER_CPU_CHANNEL, | |
229 | METADATA_CHANNEL, | |
230 | }; | |
231 | ||
46050b1a MD |
232 | int lttng_abi_create_root_handle(void) |
233 | { | |
234 | int root_handle; | |
235 | ||
236 | root_handle = objd_alloc(NULL, <tng_ops); | |
46050b1a MD |
237 | return root_handle; |
238 | } | |
239 | ||
818173b9 | 240 | static |
f4681817 MD |
241 | int lttng_abi_create_session(void) |
242 | { | |
243 | struct ltt_session *session; | |
244 | int session_objd, ret; | |
245 | ||
246 | session = ltt_session_create(); | |
247 | if (!session) | |
248 | return -ENOMEM; | |
249 | session_objd = objd_alloc(session, <tng_session_ops); | |
250 | if (session_objd < 0) { | |
251 | ret = session_objd; | |
252 | goto objd_error; | |
253 | } | |
254 | session->objd = session_objd; | |
255 | return session_objd; | |
256 | ||
257 | objd_error: | |
258 | ltt_session_destroy(session); | |
259 | return ret; | |
260 | } | |
261 | ||
f4681817 MD |
262 | static |
263 | long lttng_abi_tracer_version(int objd, | |
264 | struct lttng_ust_tracer_version *v) | |
265 | { | |
23c8854a MD |
266 | v->major = LTTNG_UST_MAJOR_VERSION; |
267 | v->minor = LTTNG_UST_MINOR_VERSION; | |
268 | v->patchlevel = LTTNG_UST_PATCHLEVEL_VERSION; | |
f4681817 MD |
269 | return 0; |
270 | } | |
271 | ||
272 | static | |
273 | long lttng_abi_add_context(int objd, | |
274 | struct lttng_ust_context *context_param, | |
275 | struct lttng_ctx **ctx, struct ltt_session *session) | |
276 | { | |
277 | if (session->been_active) | |
278 | return -EPERM; | |
279 | ||
280 | switch (context_param->ctx) { | |
8de38cf7 MD |
281 | case LTTNG_UST_CONTEXT_PTHREAD_ID: |
282 | return lttng_add_pthread_id_to_ctx(ctx); | |
3b402b40 MD |
283 | case LTTNG_UST_CONTEXT_VTID: |
284 | return lttng_add_vtid_to_ctx(ctx); | |
c1ef86f0 MD |
285 | case LTTNG_UST_CONTEXT_VPID: |
286 | return lttng_add_vpid_to_ctx(ctx); | |
4847e9bb MD |
287 | case LTTNG_UST_CONTEXT_PROCNAME: |
288 | return lttng_add_procname_to_ctx(ctx); | |
f4681817 MD |
289 | default: |
290 | return -EINVAL; | |
291 | } | |
292 | } | |
293 | ||
294 | /** | |
295 | * lttng_cmd - lttng control through socket commands | |
296 | * | |
297 | * @objd: the object descriptor | |
298 | * @cmd: the command | |
299 | * @arg: command arg | |
ef9ff354 | 300 | * @uargs: UST arguments (internal) |
f4681817 MD |
301 | * |
302 | * This descriptor implements lttng commands: | |
303 | * LTTNG_UST_SESSION | |
304 | * Returns a LTTng trace session object descriptor | |
305 | * LTTNG_UST_TRACER_VERSION | |
306 | * Returns the LTTng kernel tracer version | |
307 | * LTTNG_UST_TRACEPOINT_LIST | |
308 | * Returns a file descriptor listing available tracepoints | |
06d4f27e MD |
309 | * LTTNG_UST_TRACEPOINT_FIELD_LIST |
310 | * Returns a file descriptor listing available tracepoint fields | |
f4681817 MD |
311 | * LTTNG_UST_WAIT_QUIESCENT |
312 | * Returns after all previously running probes have completed | |
313 | * | |
314 | * The returned session will be deleted when its file descriptor is closed. | |
315 | */ | |
316 | static | |
ef9ff354 MD |
317 | long lttng_cmd(int objd, unsigned int cmd, unsigned long arg, |
318 | union ust_args *uargs) | |
f4681817 MD |
319 | { |
320 | switch (cmd) { | |
321 | case LTTNG_UST_SESSION: | |
322 | return lttng_abi_create_session(); | |
323 | case LTTNG_UST_TRACER_VERSION: | |
324 | return lttng_abi_tracer_version(objd, | |
325 | (struct lttng_ust_tracer_version *) arg); | |
326 | case LTTNG_UST_TRACEPOINT_LIST: | |
51489cad | 327 | return lttng_abi_tracepoint_list(); |
06d4f27e MD |
328 | case LTTNG_UST_TRACEPOINT_FIELD_LIST: |
329 | return lttng_abi_tracepoint_field_list(); | |
f4681817 MD |
330 | case LTTNG_UST_WAIT_QUIESCENT: |
331 | synchronize_trace(); | |
332 | return 0; | |
333 | default: | |
334 | return -EINVAL; | |
335 | } | |
336 | } | |
337 | ||
b61ce3b2 | 338 | static const struct lttng_ust_objd_ops lttng_ops = { |
f4681817 MD |
339 | .cmd = lttng_cmd, |
340 | }; | |
341 | ||
342 | /* | |
343 | * We tolerate no failure in this function (if one happens, we print a dmesg | |
344 | * error, but cannot return any error, because the channel information is | |
345 | * invariant. | |
346 | */ | |
347 | static | |
348 | void lttng_metadata_create_events(int channel_objd) | |
349 | { | |
350 | struct ltt_channel *channel = objd_private(channel_objd); | |
351 | static struct lttng_ust_event metadata_params = { | |
352 | .instrumentation = LTTNG_UST_TRACEPOINT, | |
a4ada9b8 | 353 | .name = "lttng_ust:metadata", |
457a6b58 MD |
354 | .loglevel_type = LTTNG_UST_LOGLEVEL_ALL, |
355 | .loglevel = TRACE_DEFAULT, | |
f4681817 MD |
356 | }; |
357 | struct ltt_event *event; | |
576599a0 | 358 | int ret; |
f4681817 MD |
359 | |
360 | /* | |
361 | * We tolerate no failure path after event creation. It will stay | |
362 | * invariant for the rest of the session. | |
363 | */ | |
576599a0 MD |
364 | ret = ltt_event_create(channel, &metadata_params, NULL, &event); |
365 | if (ret < 0) { | |
f4681817 MD |
366 | goto create_error; |
367 | } | |
368 | return; | |
369 | ||
370 | create_error: | |
371 | WARN_ON(1); | |
372 | return; /* not allowed to return error */ | |
373 | } | |
374 | ||
f4681817 MD |
375 | int lttng_abi_create_channel(int session_objd, |
376 | struct lttng_ust_channel *chan_param, | |
ef9ff354 MD |
377 | enum channel_type channel_type, |
378 | union ust_args *uargs) | |
f4681817 MD |
379 | { |
380 | struct ltt_session *session = objd_private(session_objd); | |
b61ce3b2 | 381 | const struct lttng_ust_objd_ops *ops; |
f4681817 MD |
382 | const char *transport_name; |
383 | struct ltt_channel *chan; | |
384 | int chan_objd; | |
385 | int ret = 0; | |
d028eddb | 386 | struct ltt_channel chan_priv_init; |
f4681817 | 387 | |
f4681817 MD |
388 | switch (channel_type) { |
389 | case PER_CPU_CHANNEL: | |
390 | if (chan_param->output == LTTNG_UST_MMAP) { | |
391 | transport_name = chan_param->overwrite ? | |
392 | "relay-overwrite-mmap" : "relay-discard-mmap"; | |
393 | } else { | |
394 | return -EINVAL; | |
395 | } | |
396 | ops = <tng_channel_ops; | |
397 | break; | |
398 | case METADATA_CHANNEL: | |
399 | if (chan_param->output == LTTNG_UST_MMAP) | |
400 | transport_name = "relay-metadata-mmap"; | |
401 | else | |
402 | return -EINVAL; | |
403 | ops = <tng_metadata_ops; | |
404 | break; | |
405 | default: | |
406 | transport_name = "<unknown>"; | |
fe38d4af MD |
407 | return -EINVAL; |
408 | } | |
409 | chan_objd = objd_alloc(NULL, ops); | |
410 | if (chan_objd < 0) { | |
411 | ret = chan_objd; | |
412 | goto objd_error; | |
f4681817 | 413 | } |
d028eddb MD |
414 | memset(&chan_priv_init, 0, sizeof(chan_priv_init)); |
415 | /* Copy of session UUID for consumer (availability through shm) */ | |
416 | memcpy(chan_priv_init.uuid, session->uuid, sizeof(session->uuid)); | |
417 | ||
f4681817 MD |
418 | /* |
419 | * We tolerate no failure path after channel creation. It will stay | |
420 | * invariant for the rest of the session. | |
421 | */ | |
422 | chan = ltt_channel_create(session, transport_name, NULL, | |
423 | chan_param->subbuf_size, | |
424 | chan_param->num_subbuf, | |
425 | chan_param->switch_timer_interval, | |
193183fb | 426 | chan_param->read_timer_interval, |
ef9ff354 MD |
427 | &uargs->channel.shm_fd, |
428 | &uargs->channel.wait_fd, | |
429 | &uargs->channel.memory_map_size, | |
d028eddb | 430 | &chan_priv_init); |
f4681817 MD |
431 | if (!chan) { |
432 | ret = -EINVAL; | |
433 | goto chan_error; | |
434 | } | |
435 | objd_set_private(chan_objd, chan); | |
436 | chan->objd = chan_objd; | |
437 | if (channel_type == METADATA_CHANNEL) { | |
438 | session->metadata = chan; | |
439 | lttng_metadata_create_events(chan_objd); | |
440 | } | |
f4681817 MD |
441 | /* The channel created holds a reference on the session */ |
442 | objd_ref(session_objd); | |
443 | ||
444 | return chan_objd; | |
445 | ||
446 | chan_error: | |
1ea11eab MD |
447 | { |
448 | int err; | |
449 | ||
d4419b81 | 450 | err = lttng_ust_objd_unref(chan_objd); |
1ea11eab MD |
451 | assert(!err); |
452 | } | |
f4681817 MD |
453 | objd_error: |
454 | return ret; | |
455 | } | |
456 | ||
457 | /** | |
458 | * lttng_session_cmd - lttng session object command | |
459 | * | |
460 | * @obj: the object | |
461 | * @cmd: the command | |
462 | * @arg: command arg | |
ef9ff354 | 463 | * @uargs: UST arguments (internal) |
f4681817 MD |
464 | * |
465 | * This descriptor implements lttng commands: | |
466 | * LTTNG_UST_CHANNEL | |
467 | * Returns a LTTng channel object descriptor | |
468 | * LTTNG_UST_ENABLE | |
469 | * Enables tracing for a session (weak enable) | |
470 | * LTTNG_UST_DISABLE | |
471 | * Disables tracing for a session (strong disable) | |
472 | * LTTNG_UST_METADATA | |
473 | * Returns a LTTng metadata object descriptor | |
474 | * | |
475 | * The returned channel will be deleted when its file descriptor is closed. | |
476 | */ | |
477 | static | |
ef9ff354 MD |
478 | long lttng_session_cmd(int objd, unsigned int cmd, unsigned long arg, |
479 | union ust_args *uargs) | |
f4681817 MD |
480 | { |
481 | struct ltt_session *session = objd_private(objd); | |
482 | ||
483 | switch (cmd) { | |
484 | case LTTNG_UST_CHANNEL: | |
485 | return lttng_abi_create_channel(objd, | |
486 | (struct lttng_ust_channel *) arg, | |
ef9ff354 | 487 | PER_CPU_CHANNEL, uargs); |
f4681817 MD |
488 | case LTTNG_UST_SESSION_START: |
489 | case LTTNG_UST_ENABLE: | |
490 | return ltt_session_enable(session); | |
491 | case LTTNG_UST_SESSION_STOP: | |
492 | case LTTNG_UST_DISABLE: | |
493 | return ltt_session_disable(session); | |
494 | case LTTNG_UST_METADATA: | |
495 | return lttng_abi_create_channel(objd, | |
496 | (struct lttng_ust_channel *) arg, | |
ef9ff354 | 497 | METADATA_CHANNEL, uargs); |
f4681817 MD |
498 | default: |
499 | return -EINVAL; | |
500 | } | |
501 | } | |
502 | ||
503 | /* | |
504 | * Called when the last file reference is dropped. | |
505 | * | |
506 | * Big fat note: channels and events are invariant for the whole session after | |
507 | * their creation. So this session destruction also destroys all channel and | |
508 | * event structures specific to this session (they are not destroyed when their | |
509 | * individual file is released). | |
510 | */ | |
511 | static | |
1ea11eab | 512 | int lttng_release_session(int objd) |
f4681817 MD |
513 | { |
514 | struct ltt_session *session = objd_private(objd); | |
515 | ||
1ea11eab | 516 | if (session) { |
f4681817 | 517 | ltt_session_destroy(session); |
1ea11eab MD |
518 | return 0; |
519 | } else { | |
520 | return -EINVAL; | |
521 | } | |
f4681817 MD |
522 | } |
523 | ||
b61ce3b2 | 524 | static const struct lttng_ust_objd_ops lttng_session_ops = { |
1ea11eab | 525 | .release = lttng_release_session, |
f4681817 MD |
526 | .cmd = lttng_session_cmd, |
527 | }; | |
528 | ||
51489cad | 529 | static |
ef9ff354 MD |
530 | long lttng_tracepoint_list_cmd(int objd, unsigned int cmd, unsigned long arg, |
531 | union ust_args *uargs) | |
51489cad | 532 | { |
c8fcf224 | 533 | struct lttng_ust_tracepoint_list *list = objd_private(objd); |
cbef6901 MD |
534 | struct lttng_ust_tracepoint_iter *tp = |
535 | (struct lttng_ust_tracepoint_iter *) arg; | |
c8fcf224 | 536 | struct lttng_ust_tracepoint_iter *iter; |
51489cad MD |
537 | |
538 | switch (cmd) { | |
539 | case LTTNG_UST_TRACEPOINT_LIST_GET: | |
c8fcf224 MD |
540 | { |
541 | retry: | |
542 | iter = lttng_ust_tracepoint_list_get_iter_next(list); | |
543 | if (!iter) | |
b115631f | 544 | return -ENOENT; |
c8fcf224 MD |
545 | if (!strcmp(iter->name, "lttng_ust:metadata")) |
546 | goto retry; | |
547 | memcpy(tp, iter, sizeof(*tp)); | |
51489cad | 548 | return 0; |
c8fcf224 | 549 | } |
51489cad MD |
550 | default: |
551 | return -EINVAL; | |
552 | } | |
553 | } | |
554 | ||
555 | static | |
556 | int lttng_abi_tracepoint_list(void) | |
557 | { | |
558 | int list_objd, ret; | |
c8fcf224 | 559 | struct lttng_ust_tracepoint_list *list; |
51489cad MD |
560 | |
561 | list_objd = objd_alloc(NULL, <tng_tracepoint_list_ops); | |
562 | if (list_objd < 0) { | |
563 | ret = list_objd; | |
564 | goto objd_error; | |
565 | } | |
566 | list = zmalloc(sizeof(*list)); | |
567 | if (!list) { | |
568 | ret = -ENOMEM; | |
569 | goto alloc_error; | |
570 | } | |
571 | objd_set_private(list_objd, list); | |
572 | ||
c8fcf224 MD |
573 | /* populate list by walking on all registered probes. */ |
574 | ret = ltt_probes_get_event_list(list); | |
575 | if (ret) { | |
576 | goto list_error; | |
577 | } | |
51489cad MD |
578 | return list_objd; |
579 | ||
c8fcf224 MD |
580 | list_error: |
581 | free(list); | |
51489cad MD |
582 | alloc_error: |
583 | { | |
584 | int err; | |
585 | ||
586 | err = lttng_ust_objd_unref(list_objd); | |
587 | assert(!err); | |
588 | } | |
589 | objd_error: | |
590 | return ret; | |
591 | } | |
592 | ||
593 | static | |
594 | int lttng_release_tracepoint_list(int objd) | |
595 | { | |
c8fcf224 | 596 | struct lttng_ust_tracepoint_list *list = objd_private(objd); |
51489cad MD |
597 | |
598 | if (list) { | |
c8fcf224 | 599 | ltt_probes_prune_event_list(list); |
51489cad MD |
600 | free(list); |
601 | return 0; | |
602 | } else { | |
603 | return -EINVAL; | |
604 | } | |
605 | } | |
606 | ||
607 | static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops = { | |
608 | .release = lttng_release_tracepoint_list, | |
609 | .cmd = lttng_tracepoint_list_cmd, | |
610 | }; | |
611 | ||
06d4f27e MD |
612 | static |
613 | long lttng_tracepoint_field_list_cmd(int objd, unsigned int cmd, | |
614 | unsigned long arg, union ust_args *uargs) | |
615 | { | |
616 | struct lttng_ust_field_list *list = objd_private(objd); | |
617 | struct lttng_ust_field_iter *tp = | |
618 | (struct lttng_ust_field_iter *) arg; | |
619 | struct lttng_ust_field_iter *iter; | |
620 | ||
621 | switch (cmd) { | |
622 | case LTTNG_UST_TRACEPOINT_FIELD_LIST_GET: | |
623 | { | |
624 | retry: | |
625 | iter = lttng_ust_field_list_get_iter_next(list); | |
626 | if (!iter) | |
627 | return -ENOENT; | |
628 | if (!strcmp(iter->event_name, "lttng_ust:metadata")) | |
629 | goto retry; | |
630 | memcpy(tp, iter, sizeof(*tp)); | |
631 | return 0; | |
632 | } | |
633 | default: | |
634 | return -EINVAL; | |
635 | } | |
636 | } | |
637 | ||
638 | static | |
639 | int lttng_abi_tracepoint_field_list(void) | |
640 | { | |
641 | int list_objd, ret; | |
642 | struct lttng_ust_field_list *list; | |
643 | ||
644 | list_objd = objd_alloc(NULL, <tng_tracepoint_field_list_ops); | |
645 | if (list_objd < 0) { | |
646 | ret = list_objd; | |
647 | goto objd_error; | |
648 | } | |
649 | list = zmalloc(sizeof(*list)); | |
650 | if (!list) { | |
651 | ret = -ENOMEM; | |
652 | goto alloc_error; | |
653 | } | |
654 | objd_set_private(list_objd, list); | |
655 | ||
656 | /* populate list by walking on all registered probes. */ | |
657 | ret = ltt_probes_get_field_list(list); | |
658 | if (ret) { | |
659 | goto list_error; | |
660 | } | |
661 | return list_objd; | |
662 | ||
663 | list_error: | |
664 | free(list); | |
665 | alloc_error: | |
666 | { | |
667 | int err; | |
668 | ||
669 | err = lttng_ust_objd_unref(list_objd); | |
670 | assert(!err); | |
671 | } | |
672 | objd_error: | |
673 | return ret; | |
674 | } | |
675 | ||
676 | static | |
677 | int lttng_release_tracepoint_field_list(int objd) | |
678 | { | |
679 | struct lttng_ust_field_list *list = objd_private(objd); | |
680 | ||
681 | if (list) { | |
682 | ltt_probes_prune_field_list(list); | |
683 | free(list); | |
684 | return 0; | |
685 | } else { | |
686 | return -EINVAL; | |
687 | } | |
688 | } | |
689 | ||
690 | static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops = { | |
691 | .release = lttng_release_tracepoint_field_list, | |
692 | .cmd = lttng_tracepoint_field_list_cmd, | |
693 | }; | |
694 | ||
381c0f1e | 695 | struct stream_priv_data { |
4cfec15c | 696 | struct lttng_ust_lib_ring_buffer *buf; |
381c0f1e MD |
697 | struct ltt_channel *ltt_chan; |
698 | }; | |
699 | ||
f4681817 | 700 | static |
ef9ff354 MD |
701 | int lttng_abi_open_stream(int channel_objd, struct lttng_ust_stream *info, |
702 | union ust_args *uargs) | |
f4681817 MD |
703 | { |
704 | struct ltt_channel *channel = objd_private(channel_objd); | |
4cfec15c | 705 | struct lttng_ust_lib_ring_buffer *buf; |
381c0f1e | 706 | struct stream_priv_data *priv; |
f4681817 MD |
707 | int stream_objd, ret; |
708 | ||
381c0f1e | 709 | buf = channel->ops->buffer_read_open(channel->chan, channel->handle, |
ef9ff354 MD |
710 | &uargs->stream.shm_fd, |
711 | &uargs->stream.wait_fd, | |
712 | &uargs->stream.memory_map_size); | |
f4681817 MD |
713 | if (!buf) |
714 | return -ENOENT; | |
715 | ||
381c0f1e MD |
716 | priv = zmalloc(sizeof(*priv)); |
717 | if (!priv) { | |
718 | ret = -ENOMEM; | |
719 | goto alloc_error; | |
720 | } | |
721 | priv->buf = buf; | |
722 | priv->ltt_chan = channel; | |
723 | stream_objd = objd_alloc(priv, &lib_ring_buffer_objd_ops); | |
f4681817 MD |
724 | if (stream_objd < 0) { |
725 | ret = stream_objd; | |
726 | goto objd_error; | |
727 | } | |
381c0f1e MD |
728 | /* Hold a reference on the channel object descriptor */ |
729 | objd_ref(channel_objd); | |
f4681817 MD |
730 | return stream_objd; |
731 | ||
732 | objd_error: | |
381c0f1e MD |
733 | free(priv); |
734 | alloc_error: | |
735 | channel->ops->buffer_read_close(buf, channel->handle); | |
f4681817 MD |
736 | return ret; |
737 | } | |
f4681817 MD |
738 | |
739 | static | |
740 | int lttng_abi_create_event(int channel_objd, | |
741 | struct lttng_ust_event *event_param) | |
742 | { | |
743 | struct ltt_channel *channel = objd_private(channel_objd); | |
744 | struct ltt_event *event; | |
745 | int event_objd, ret; | |
746 | ||
747 | event_param->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
748 | event_objd = objd_alloc(NULL, <tng_event_ops); | |
749 | if (event_objd < 0) { | |
750 | ret = event_objd; | |
751 | goto objd_error; | |
752 | } | |
753 | /* | |
754 | * We tolerate no failure path after event creation. It will stay | |
755 | * invariant for the rest of the session. | |
756 | */ | |
576599a0 MD |
757 | ret = ltt_event_create(channel, event_param, NULL, &event); |
758 | if (ret < 0) { | |
f4681817 MD |
759 | goto event_error; |
760 | } | |
761 | objd_set_private(event_objd, event); | |
762 | /* The event holds a reference on the channel */ | |
763 | objd_ref(channel_objd); | |
764 | return event_objd; | |
765 | ||
766 | event_error: | |
1ea11eab MD |
767 | { |
768 | int err; | |
769 | ||
d4419b81 | 770 | err = lttng_ust_objd_unref(event_objd); |
1ea11eab MD |
771 | assert(!err); |
772 | } | |
f4681817 MD |
773 | objd_error: |
774 | return ret; | |
775 | } | |
776 | ||
e6c12e3d MD |
777 | static |
778 | int lttng_abi_create_wildcard(int channel_objd, | |
779 | struct lttng_ust_event *event_param) | |
780 | { | |
781 | struct ltt_channel *channel = objd_private(channel_objd); | |
782 | struct session_wildcard *wildcard; | |
783 | int wildcard_objd, ret; | |
784 | ||
785 | event_param->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
786 | wildcard_objd = objd_alloc(NULL, <tng_wildcard_ops); | |
787 | if (wildcard_objd < 0) { | |
788 | ret = wildcard_objd; | |
789 | goto objd_error; | |
790 | } | |
791 | /* | |
792 | * We tolerate no failure path after wildcard creation. It will | |
793 | * stay invariant for the rest of the session. | |
794 | */ | |
795 | ret = ltt_wildcard_create(channel, event_param, &wildcard); | |
796 | if (ret < 0) { | |
797 | goto wildcard_error; | |
798 | } | |
799 | objd_set_private(wildcard_objd, wildcard); | |
800 | /* The wildcard holds a reference on the channel */ | |
801 | objd_ref(channel_objd); | |
802 | return wildcard_objd; | |
803 | ||
804 | wildcard_error: | |
805 | { | |
806 | int err; | |
807 | ||
808 | err = lttng_ust_objd_unref(wildcard_objd); | |
809 | assert(!err); | |
810 | } | |
811 | objd_error: | |
812 | return ret; | |
813 | } | |
814 | ||
f4681817 MD |
815 | /** |
816 | * lttng_channel_cmd - lttng control through object descriptors | |
817 | * | |
818 | * @objd: the object descriptor | |
819 | * @cmd: the command | |
820 | * @arg: command arg | |
ef9ff354 | 821 | * @uargs: UST arguments (internal) |
f4681817 MD |
822 | * |
823 | * This object descriptor implements lttng commands: | |
824 | * LTTNG_UST_STREAM | |
825 | * Returns an event stream object descriptor or failure. | |
826 | * (typically, one event stream records events from one CPU) | |
827 | * LTTNG_UST_EVENT | |
828 | * Returns an event object descriptor or failure. | |
829 | * LTTNG_UST_CONTEXT | |
830 | * Prepend a context field to each event in the channel | |
831 | * LTTNG_UST_ENABLE | |
832 | * Enable recording for events in this channel (weak enable) | |
833 | * LTTNG_UST_DISABLE | |
834 | * Disable recording for events in this channel (strong disable) | |
835 | * | |
836 | * Channel and event file descriptors also hold a reference on the session. | |
837 | */ | |
838 | static | |
ef9ff354 MD |
839 | long lttng_channel_cmd(int objd, unsigned int cmd, unsigned long arg, |
840 | union ust_args *uargs) | |
f4681817 MD |
841 | { |
842 | struct ltt_channel *channel = objd_private(objd); | |
843 | ||
844 | switch (cmd) { | |
845 | case LTTNG_UST_STREAM: | |
381c0f1e MD |
846 | { |
847 | struct lttng_ust_stream *stream; | |
848 | ||
849 | stream = (struct lttng_ust_stream *) arg; | |
850 | /* stream used as output */ | |
ef9ff354 | 851 | return lttng_abi_open_stream(objd, stream, uargs); |
381c0f1e | 852 | } |
f4681817 | 853 | case LTTNG_UST_EVENT: |
1f18504e MD |
854 | { |
855 | struct lttng_ust_event *event_param = | |
856 | (struct lttng_ust_event *) arg; | |
6b0e60f1 MD |
857 | if (event_param->name[strlen(event_param->name) - 1] == '*') { |
858 | /* If ends with wildcard, create wildcard. */ | |
859 | return lttng_abi_create_wildcard(objd, event_param); | |
1f18504e | 860 | } else { |
6b0e60f1 | 861 | return lttng_abi_create_event(objd, event_param); |
1f18504e MD |
862 | } |
863 | } | |
f4681817 MD |
864 | case LTTNG_UST_CONTEXT: |
865 | return lttng_abi_add_context(objd, | |
866 | (struct lttng_ust_context *) arg, | |
867 | &channel->ctx, channel->session); | |
868 | case LTTNG_UST_ENABLE: | |
869 | return ltt_channel_enable(channel); | |
870 | case LTTNG_UST_DISABLE: | |
871 | return ltt_channel_disable(channel); | |
43d330a4 MD |
872 | case LTTNG_UST_FLUSH_BUFFER: |
873 | return channel->ops->flush_buffer(channel->chan, channel->handle); | |
f4681817 MD |
874 | default: |
875 | return -EINVAL; | |
876 | } | |
877 | } | |
878 | ||
879 | /** | |
880 | * lttng_metadata_cmd - lttng control through object descriptors | |
881 | * | |
882 | * @objd: the object descriptor | |
883 | * @cmd: the command | |
884 | * @arg: command arg | |
ef9ff354 | 885 | * @uargs: UST arguments (internal) |
f4681817 MD |
886 | * |
887 | * This object descriptor implements lttng commands: | |
888 | * LTTNG_UST_STREAM | |
889 | * Returns an event stream file descriptor or failure. | |
890 | * | |
891 | * Channel and event file descriptors also hold a reference on the session. | |
892 | */ | |
893 | static | |
ef9ff354 MD |
894 | long lttng_metadata_cmd(int objd, unsigned int cmd, unsigned long arg, |
895 | union ust_args *uargs) | |
f4681817 | 896 | { |
43861eab MD |
897 | struct ltt_channel *channel = objd_private(objd); |
898 | ||
f4681817 MD |
899 | switch (cmd) { |
900 | case LTTNG_UST_STREAM: | |
381c0f1e MD |
901 | { |
902 | struct lttng_ust_stream *stream; | |
903 | ||
904 | stream = (struct lttng_ust_stream *) arg; | |
905 | /* stream used as output */ | |
ef9ff354 | 906 | return lttng_abi_open_stream(objd, stream, uargs); |
381c0f1e | 907 | } |
43d330a4 MD |
908 | case LTTNG_UST_FLUSH_BUFFER: |
909 | return channel->ops->flush_buffer(channel->chan, channel->handle); | |
f4681817 MD |
910 | default: |
911 | return -EINVAL; | |
912 | } | |
913 | } | |
914 | ||
915 | #if 0 | |
916 | /** | |
917 | * lttng_channel_poll - lttng stream addition/removal monitoring | |
918 | * | |
919 | * @file: the file | |
920 | * @wait: poll table | |
921 | */ | |
922 | unsigned int lttng_channel_poll(struct file *file, poll_table *wait) | |
923 | { | |
924 | struct ltt_channel *channel = file->private_data; | |
925 | unsigned int mask = 0; | |
926 | ||
927 | if (file->f_mode & FMODE_READ) { | |
928 | poll_wait_set_exclusive(wait); | |
929 | poll_wait(file, channel->ops->get_hp_wait_queue(channel->chan), | |
930 | wait); | |
931 | ||
932 | if (channel->ops->is_disabled(channel->chan)) | |
933 | return POLLERR; | |
934 | if (channel->ops->is_finalized(channel->chan)) | |
935 | return POLLHUP; | |
936 | if (channel->ops->buffer_has_read_closed_stream(channel->chan)) | |
937 | return POLLIN | POLLRDNORM; | |
938 | return 0; | |
939 | } | |
940 | return mask; | |
941 | ||
942 | } | |
943 | #endif //0 | |
944 | ||
945 | static | |
946 | int lttng_channel_release(int objd) | |
947 | { | |
948 | struct ltt_channel *channel = objd_private(objd); | |
949 | ||
950 | if (channel) | |
d4419b81 | 951 | return lttng_ust_objd_unref(channel->session->objd); |
f4681817 MD |
952 | return 0; |
953 | } | |
954 | ||
b61ce3b2 | 955 | static const struct lttng_ust_objd_ops lttng_channel_ops = { |
f4681817 MD |
956 | .release = lttng_channel_release, |
957 | //.poll = lttng_channel_poll, | |
958 | .cmd = lttng_channel_cmd, | |
959 | }; | |
960 | ||
b61ce3b2 | 961 | static const struct lttng_ust_objd_ops lttng_metadata_ops = { |
f4681817 MD |
962 | .release = lttng_channel_release, |
963 | .cmd = lttng_metadata_cmd, | |
964 | }; | |
965 | ||
381c0f1e MD |
966 | /** |
967 | * lttng_rb_cmd - lttng ring buffer control through object descriptors | |
968 | * | |
969 | * @objd: the object descriptor | |
970 | * @cmd: the command | |
971 | * @arg: command arg | |
ef9ff354 | 972 | * @uargs: UST arguments (internal) |
381c0f1e MD |
973 | * |
974 | * This object descriptor implements lttng commands: | |
975 | * (None for now. Access is done directly though shm.) | |
381c0f1e MD |
976 | */ |
977 | static | |
ef9ff354 MD |
978 | long lttng_rb_cmd(int objd, unsigned int cmd, unsigned long arg, |
979 | union ust_args *uargs) | |
381c0f1e | 980 | { |
381c0f1e MD |
981 | switch (cmd) { |
982 | default: | |
983 | return -EINVAL; | |
984 | } | |
985 | } | |
986 | ||
987 | static | |
988 | int lttng_rb_release(int objd) | |
989 | { | |
990 | struct stream_priv_data *priv = objd_private(objd); | |
4cfec15c | 991 | struct lttng_ust_lib_ring_buffer *buf; |
381c0f1e MD |
992 | struct ltt_channel *channel; |
993 | ||
994 | if (priv) { | |
995 | buf = priv->buf; | |
996 | channel = priv->ltt_chan; | |
997 | free(priv); | |
45e9e699 MD |
998 | /* |
999 | * If we are at ABI exit, we don't want to close the | |
1000 | * buffer opened for read: it is being shared between | |
1001 | * the parent and child (right after fork), and we don't | |
1002 | * want the child to close it for the parent. For a real | |
1003 | * exit, we don't care about marking it as closed, as | |
1004 | * the consumer daemon (if there is one) will do fine | |
1005 | * even if we don't mark it as "closed" for reading on | |
1006 | * our side. | |
1007 | * We only mark it as closed if it is being explicitely | |
1008 | * released by the session daemon with an explicit | |
1009 | * release command. | |
1010 | */ | |
1011 | if (!lttng_ust_abi_close_in_progress) | |
1012 | channel->ops->buffer_read_close(buf, channel->handle); | |
381c0f1e | 1013 | |
d4419b81 | 1014 | return lttng_ust_objd_unref(channel->objd); |
381c0f1e MD |
1015 | } |
1016 | return 0; | |
1017 | } | |
1018 | ||
b61ce3b2 | 1019 | static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops = { |
381c0f1e MD |
1020 | .release = lttng_rb_release, |
1021 | .cmd = lttng_rb_cmd, | |
1022 | }; | |
1023 | ||
f4681817 MD |
1024 | /** |
1025 | * lttng_event_cmd - lttng control through object descriptors | |
1026 | * | |
1027 | * @objd: the object descriptor | |
1028 | * @cmd: the command | |
1029 | * @arg: command arg | |
ef9ff354 | 1030 | * @uargs: UST arguments (internal) |
f4681817 MD |
1031 | * |
1032 | * This object descriptor implements lttng commands: | |
1033 | * LTTNG_UST_CONTEXT | |
1034 | * Prepend a context field to each record of this event | |
1035 | * LTTNG_UST_ENABLE | |
1036 | * Enable recording for this event (weak enable) | |
1037 | * LTTNG_UST_DISABLE | |
1038 | * Disable recording for this event (strong disable) | |
1039 | */ | |
1040 | static | |
ef9ff354 MD |
1041 | long lttng_event_cmd(int objd, unsigned int cmd, unsigned long arg, |
1042 | union ust_args *uargs) | |
f4681817 MD |
1043 | { |
1044 | struct ltt_event *event = objd_private(objd); | |
1045 | ||
1046 | switch (cmd) { | |
1047 | case LTTNG_UST_CONTEXT: | |
1048 | return lttng_abi_add_context(objd, | |
1049 | (struct lttng_ust_context *) arg, | |
1050 | &event->ctx, event->chan->session); | |
1051 | case LTTNG_UST_ENABLE: | |
1052 | return ltt_event_enable(event); | |
1053 | case LTTNG_UST_DISABLE: | |
1054 | return ltt_event_disable(event); | |
1055 | default: | |
1056 | return -EINVAL; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | static | |
1061 | int lttng_event_release(int objd) | |
1062 | { | |
1063 | struct ltt_event *event = objd_private(objd); | |
1064 | ||
1065 | if (event) | |
d4419b81 | 1066 | return lttng_ust_objd_unref(event->chan->objd); |
f4681817 MD |
1067 | return 0; |
1068 | } | |
1069 | ||
1070 | /* TODO: filter control ioctl */ | |
b61ce3b2 | 1071 | static const struct lttng_ust_objd_ops lttng_event_ops = { |
f4681817 MD |
1072 | .release = lttng_event_release, |
1073 | .cmd = lttng_event_cmd, | |
1074 | }; | |
1075 | ||
e6c12e3d MD |
1076 | /** |
1077 | * lttng_wildcard_cmd - lttng control through object descriptors | |
1078 | * | |
1079 | * @objd: the object descriptor | |
1080 | * @cmd: the command | |
1081 | * @arg: command arg | |
ef9ff354 | 1082 | * @uargs: UST arguments (internal) |
e6c12e3d MD |
1083 | * |
1084 | * This object descriptor implements lttng commands: | |
1085 | * LTTNG_UST_CONTEXT | |
1086 | * Prepend a context field to each record of events of this | |
1087 | * wildcard. | |
1088 | * LTTNG_UST_ENABLE | |
1089 | * Enable recording for these wildcard events (weak enable) | |
1090 | * LTTNG_UST_DISABLE | |
1091 | * Disable recording for these wildcard events (strong disable) | |
1092 | */ | |
1093 | static | |
ef9ff354 MD |
1094 | long lttng_wildcard_cmd(int objd, unsigned int cmd, unsigned long arg, |
1095 | union ust_args *uargs) | |
e6c12e3d MD |
1096 | { |
1097 | struct session_wildcard *wildcard = objd_private(objd); | |
1098 | ||
1099 | switch (cmd) { | |
1100 | case LTTNG_UST_CONTEXT: | |
1101 | return -ENOSYS; /* not implemented yet */ | |
1102 | #if 0 | |
1103 | return lttng_abi_add_context(objd, | |
1104 | (struct lttng_ust_context *) arg, | |
1105 | &wildcard->ctx, wildcard->chan->session); | |
1106 | #endif | |
1107 | case LTTNG_UST_ENABLE: | |
1108 | return ltt_wildcard_enable(wildcard); | |
1109 | case LTTNG_UST_DISABLE: | |
1110 | return ltt_wildcard_disable(wildcard); | |
1111 | default: | |
1112 | return -EINVAL; | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | static | |
1117 | int lttng_wildcard_release(int objd) | |
1118 | { | |
1119 | struct session_wildcard *wildcard = objd_private(objd); | |
1120 | ||
1121 | if (wildcard) | |
1122 | return lttng_ust_objd_unref(wildcard->chan->objd); | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | /* TODO: filter control ioctl */ | |
1127 | static const struct lttng_ust_objd_ops lttng_wildcard_ops = { | |
1128 | .release = lttng_wildcard_release, | |
1129 | .cmd = lttng_wildcard_cmd, | |
1130 | }; | |
1131 | ||
b35d179d | 1132 | void lttng_ust_abi_exit(void) |
f4681817 | 1133 | { |
45e9e699 | 1134 | lttng_ust_abi_close_in_progress = 1; |
f4681817 | 1135 | objd_table_destroy(); |
45e9e699 | 1136 | lttng_ust_abi_close_in_progress = 0; |
f4681817 | 1137 | } |