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> |
7bc53e94 | 41 | #include <lttng/ust-error.h> |
f4681817 MD |
42 | #include <urcu/compiler.h> |
43 | #include <urcu/list.h> | |
4318ae1b | 44 | #include <lttng/ust-events.h> |
23c8854a | 45 | #include <lttng/ust-version.h> |
902e1379 | 46 | #include <lttng/tracepoint.h> |
d8de1354 | 47 | #include "tracepoint-internal.h" |
44c72f10 MD |
48 | #include <usterr-signal-safe.h> |
49 | #include <helper.h> | |
f4681817 | 50 | #include "ltt-tracer.h" |
4ab44fbe | 51 | |
45e9e699 MD |
52 | static int lttng_ust_abi_close_in_progress; |
53 | ||
51489cad | 54 | static |
f59ed768 | 55 | int lttng_abi_tracepoint_list(void *owner); |
06d4f27e | 56 | static |
f59ed768 | 57 | int lttng_abi_tracepoint_field_list(void *owner); |
51489cad | 58 | |
f4681817 MD |
59 | /* |
60 | * Object descriptor table. Should be protected from concurrent access | |
61 | * by the caller. | |
62 | */ | |
63 | ||
b61ce3b2 | 64 | struct lttng_ust_obj { |
f4681817 MD |
65 | union { |
66 | struct { | |
67 | void *private_data; | |
b61ce3b2 | 68 | const struct lttng_ust_objd_ops *ops; |
f4681817 | 69 | int f_count; |
f59ed768 | 70 | void *owner; |
f4681817 MD |
71 | } s; |
72 | int freelist_next; /* offset freelist. end is -1. */ | |
73 | } u; | |
74 | }; | |
75 | ||
b61ce3b2 MD |
76 | struct lttng_ust_objd_table { |
77 | struct lttng_ust_obj *array; | |
f4681817 MD |
78 | unsigned int len, allocated_len; |
79 | int freelist_head; /* offset freelist head. end is -1 */ | |
80 | }; | |
81 | ||
b61ce3b2 | 82 | static struct lttng_ust_objd_table objd_table = { |
f4681817 MD |
83 | .freelist_head = -1, |
84 | }; | |
85 | ||
86 | static | |
f59ed768 MD |
87 | int objd_alloc(void *private_data, const struct lttng_ust_objd_ops *ops, |
88 | void *owner) | |
f4681817 | 89 | { |
b61ce3b2 | 90 | struct lttng_ust_obj *obj; |
f4681817 MD |
91 | |
92 | if (objd_table.freelist_head != -1) { | |
93 | obj = &objd_table.array[objd_table.freelist_head]; | |
94 | objd_table.freelist_head = obj->u.freelist_next; | |
95 | goto end; | |
96 | } | |
97 | ||
98 | if (objd_table.len >= objd_table.allocated_len) { | |
99 | unsigned int new_allocated_len, old_allocated_len; | |
b61ce3b2 | 100 | struct lttng_ust_obj *new_table, *old_table; |
f4681817 MD |
101 | |
102 | old_allocated_len = objd_table.allocated_len; | |
103 | old_table = objd_table.array; | |
104 | if (!old_allocated_len) | |
105 | new_allocated_len = 1; | |
106 | else | |
107 | new_allocated_len = old_allocated_len << 1; | |
b61ce3b2 | 108 | new_table = zmalloc(sizeof(struct lttng_ust_obj) * new_allocated_len); |
f4681817 MD |
109 | if (!new_table) |
110 | return -ENOMEM; | |
111 | memcpy(new_table, old_table, | |
b61ce3b2 | 112 | sizeof(struct lttng_ust_obj) * old_allocated_len); |
f4681817 MD |
113 | free(old_table); |
114 | objd_table.array = new_table; | |
115 | objd_table.allocated_len = new_allocated_len; | |
116 | } | |
117 | obj = &objd_table.array[objd_table.len]; | |
118 | objd_table.len++; | |
119 | end: | |
120 | obj->u.s.private_data = private_data; | |
121 | obj->u.s.ops = ops; | |
a4be8962 MD |
122 | obj->u.s.f_count = 2; /* count == 1 : object is allocated */ |
123 | /* count == 2 : allocated + hold ref */ | |
f59ed768 | 124 | obj->u.s.owner = owner; |
f4681817 MD |
125 | return obj - objd_table.array; |
126 | } | |
127 | ||
128 | static | |
b61ce3b2 | 129 | struct lttng_ust_obj *_objd_get(int id) |
f4681817 MD |
130 | { |
131 | if (id >= objd_table.len) | |
132 | return NULL; | |
a4be8962 MD |
133 | if (!objd_table.array[id].u.s.f_count) |
134 | return NULL; | |
f4681817 MD |
135 | return &objd_table.array[id]; |
136 | } | |
137 | ||
138 | static | |
139 | void *objd_private(int id) | |
140 | { | |
b61ce3b2 | 141 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
142 | assert(obj); |
143 | return obj->u.s.private_data; | |
144 | } | |
145 | ||
146 | static | |
147 | void objd_set_private(int id, void *private_data) | |
148 | { | |
b61ce3b2 | 149 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
150 | assert(obj); |
151 | obj->u.s.private_data = private_data; | |
152 | } | |
153 | ||
b61ce3b2 | 154 | const struct lttng_ust_objd_ops *objd_ops(int id) |
f4681817 | 155 | { |
b61ce3b2 | 156 | struct lttng_ust_obj *obj = _objd_get(id); |
46050b1a | 157 | |
a4be8962 MD |
158 | if (!obj) |
159 | return NULL; | |
f4681817 MD |
160 | return obj->u.s.ops; |
161 | } | |
162 | ||
163 | static | |
164 | void objd_free(int id) | |
165 | { | |
b61ce3b2 | 166 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
167 | |
168 | assert(obj); | |
169 | obj->u.freelist_next = objd_table.freelist_head; | |
170 | objd_table.freelist_head = obj - objd_table.array; | |
a4be8962 MD |
171 | assert(obj->u.s.f_count == 1); |
172 | obj->u.s.f_count = 0; /* deallocated */ | |
f4681817 MD |
173 | } |
174 | ||
175 | static | |
176 | void objd_ref(int id) | |
177 | { | |
b61ce3b2 | 178 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
179 | obj->u.s.f_count++; |
180 | } | |
181 | ||
d4419b81 | 182 | int lttng_ust_objd_unref(int id) |
f4681817 | 183 | { |
b61ce3b2 | 184 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 | 185 | |
1ea11eab MD |
186 | if (!obj) |
187 | return -EINVAL; | |
a4be8962 MD |
188 | if (obj->u.s.f_count == 1) { |
189 | ERR("Reference counting error\n"); | |
190 | return -EINVAL; | |
191 | } | |
192 | if ((--obj->u.s.f_count) == 1) { | |
b61ce3b2 | 193 | const struct lttng_ust_objd_ops *ops = objd_ops(id); |
a4be8962 | 194 | |
f4681817 MD |
195 | if (ops->release) |
196 | ops->release(id); | |
197 | objd_free(id); | |
198 | } | |
1ea11eab | 199 | return 0; |
f4681817 MD |
200 | } |
201 | ||
202 | static | |
203 | void objd_table_destroy(void) | |
204 | { | |
a4be8962 MD |
205 | int i; |
206 | ||
fb50c39d | 207 | for (i = 0; i < objd_table.allocated_len; i++) |
d4419b81 | 208 | (void) lttng_ust_objd_unref(i); |
f4681817 | 209 | free(objd_table.array); |
02fb3381 MD |
210 | objd_table.array = NULL; |
211 | objd_table.len = 0; | |
212 | objd_table.allocated_len = 0; | |
17dfb34b | 213 | objd_table.freelist_head = -1; |
f4681817 MD |
214 | } |
215 | ||
f59ed768 MD |
216 | void lttng_ust_objd_table_owner_cleanup(void *owner) |
217 | { | |
218 | int i; | |
219 | ||
220 | for (i = 0; i < objd_table.allocated_len; i++) { | |
221 | struct lttng_ust_obj *obj; | |
222 | ||
223 | obj = _objd_get(i); | |
224 | if (!obj) | |
225 | continue; | |
226 | if (!obj->u.s.owner) | |
227 | continue; /* skip root handles */ | |
228 | if (obj->u.s.owner == owner) | |
229 | (void) lttng_ust_objd_unref(i); | |
230 | } | |
231 | } | |
232 | ||
f4681817 MD |
233 | /* |
234 | * This is LTTng's own personal way to create an ABI for sessiond. | |
235 | * We send commands over a socket. | |
236 | */ | |
237 | ||
b61ce3b2 MD |
238 | static const struct lttng_ust_objd_ops lttng_ops; |
239 | static const struct lttng_ust_objd_ops lttng_session_ops; | |
240 | static const struct lttng_ust_objd_ops lttng_channel_ops; | |
241 | static const struct lttng_ust_objd_ops lttng_metadata_ops; | |
242 | static const struct lttng_ust_objd_ops lttng_event_ops; | |
e6c12e3d | 243 | static const struct lttng_ust_objd_ops lttng_wildcard_ops; |
b61ce3b2 | 244 | static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops; |
51489cad | 245 | static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops; |
06d4f27e | 246 | static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops; |
f4681817 MD |
247 | |
248 | enum channel_type { | |
249 | PER_CPU_CHANNEL, | |
250 | METADATA_CHANNEL, | |
251 | }; | |
252 | ||
46050b1a MD |
253 | int lttng_abi_create_root_handle(void) |
254 | { | |
255 | int root_handle; | |
256 | ||
f59ed768 MD |
257 | /* root handles have NULL owners */ |
258 | root_handle = objd_alloc(NULL, <tng_ops, NULL); | |
46050b1a MD |
259 | return root_handle; |
260 | } | |
261 | ||
818173b9 | 262 | static |
f59ed768 | 263 | int lttng_abi_create_session(void *owner) |
f4681817 MD |
264 | { |
265 | struct ltt_session *session; | |
266 | int session_objd, ret; | |
267 | ||
268 | session = ltt_session_create(); | |
269 | if (!session) | |
270 | return -ENOMEM; | |
f59ed768 | 271 | session_objd = objd_alloc(session, <tng_session_ops, owner); |
f4681817 MD |
272 | if (session_objd < 0) { |
273 | ret = session_objd; | |
274 | goto objd_error; | |
275 | } | |
276 | session->objd = session_objd; | |
277 | return session_objd; | |
278 | ||
279 | objd_error: | |
280 | ltt_session_destroy(session); | |
281 | return ret; | |
282 | } | |
283 | ||
f4681817 MD |
284 | static |
285 | long lttng_abi_tracer_version(int objd, | |
286 | struct lttng_ust_tracer_version *v) | |
287 | { | |
0f4eaec3 MD |
288 | v->major = LTTNG_UST_INTERNAL_MAJOR_VERSION; |
289 | v->minor = LTTNG_UST_INTERNAL_MINOR_VERSION; | |
290 | v->patchlevel = LTTNG_UST_INTERNAL_PATCHLEVEL_VERSION; | |
f4681817 MD |
291 | return 0; |
292 | } | |
293 | ||
294 | static | |
295 | long lttng_abi_add_context(int objd, | |
296 | struct lttng_ust_context *context_param, | |
297 | struct lttng_ctx **ctx, struct ltt_session *session) | |
298 | { | |
299 | if (session->been_active) | |
300 | return -EPERM; | |
301 | ||
302 | switch (context_param->ctx) { | |
8de38cf7 MD |
303 | case LTTNG_UST_CONTEXT_PTHREAD_ID: |
304 | return lttng_add_pthread_id_to_ctx(ctx); | |
3b402b40 MD |
305 | case LTTNG_UST_CONTEXT_VTID: |
306 | return lttng_add_vtid_to_ctx(ctx); | |
c1ef86f0 MD |
307 | case LTTNG_UST_CONTEXT_VPID: |
308 | return lttng_add_vpid_to_ctx(ctx); | |
4847e9bb MD |
309 | case LTTNG_UST_CONTEXT_PROCNAME: |
310 | return lttng_add_procname_to_ctx(ctx); | |
f4681817 MD |
311 | default: |
312 | return -EINVAL; | |
313 | } | |
314 | } | |
315 | ||
316 | /** | |
317 | * lttng_cmd - lttng control through socket commands | |
318 | * | |
319 | * @objd: the object descriptor | |
320 | * @cmd: the command | |
321 | * @arg: command arg | |
ef9ff354 | 322 | * @uargs: UST arguments (internal) |
f59ed768 | 323 | * @owner: objd owner |
f4681817 MD |
324 | * |
325 | * This descriptor implements lttng commands: | |
326 | * LTTNG_UST_SESSION | |
327 | * Returns a LTTng trace session object descriptor | |
328 | * LTTNG_UST_TRACER_VERSION | |
329 | * Returns the LTTng kernel tracer version | |
330 | * LTTNG_UST_TRACEPOINT_LIST | |
331 | * Returns a file descriptor listing available tracepoints | |
06d4f27e MD |
332 | * LTTNG_UST_TRACEPOINT_FIELD_LIST |
333 | * Returns a file descriptor listing available tracepoint fields | |
f4681817 MD |
334 | * LTTNG_UST_WAIT_QUIESCENT |
335 | * Returns after all previously running probes have completed | |
336 | * | |
337 | * The returned session will be deleted when its file descriptor is closed. | |
338 | */ | |
339 | static | |
ef9ff354 | 340 | long lttng_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 341 | union ust_args *uargs, void *owner) |
f4681817 MD |
342 | { |
343 | switch (cmd) { | |
344 | case LTTNG_UST_SESSION: | |
f59ed768 | 345 | return lttng_abi_create_session(owner); |
f4681817 MD |
346 | case LTTNG_UST_TRACER_VERSION: |
347 | return lttng_abi_tracer_version(objd, | |
348 | (struct lttng_ust_tracer_version *) arg); | |
349 | case LTTNG_UST_TRACEPOINT_LIST: | |
f59ed768 | 350 | return lttng_abi_tracepoint_list(owner); |
06d4f27e | 351 | case LTTNG_UST_TRACEPOINT_FIELD_LIST: |
f59ed768 | 352 | return lttng_abi_tracepoint_field_list(owner); |
f4681817 MD |
353 | case LTTNG_UST_WAIT_QUIESCENT: |
354 | synchronize_trace(); | |
355 | return 0; | |
356 | default: | |
357 | return -EINVAL; | |
358 | } | |
359 | } | |
360 | ||
b61ce3b2 | 361 | static const struct lttng_ust_objd_ops lttng_ops = { |
f4681817 MD |
362 | .cmd = lttng_cmd, |
363 | }; | |
364 | ||
365 | /* | |
366 | * We tolerate no failure in this function (if one happens, we print a dmesg | |
367 | * error, but cannot return any error, because the channel information is | |
368 | * invariant. | |
369 | */ | |
370 | static | |
371 | void lttng_metadata_create_events(int channel_objd) | |
372 | { | |
373 | struct ltt_channel *channel = objd_private(channel_objd); | |
374 | static struct lttng_ust_event metadata_params = { | |
375 | .instrumentation = LTTNG_UST_TRACEPOINT, | |
a4ada9b8 | 376 | .name = "lttng_ust:metadata", |
457a6b58 MD |
377 | .loglevel_type = LTTNG_UST_LOGLEVEL_ALL, |
378 | .loglevel = TRACE_DEFAULT, | |
f4681817 MD |
379 | }; |
380 | struct ltt_event *event; | |
576599a0 | 381 | int ret; |
f4681817 MD |
382 | |
383 | /* | |
384 | * We tolerate no failure path after event creation. It will stay | |
385 | * invariant for the rest of the session. | |
386 | */ | |
2d78951a | 387 | ret = ltt_event_create(channel, &metadata_params, &event); |
576599a0 | 388 | if (ret < 0) { |
f4681817 MD |
389 | goto create_error; |
390 | } | |
391 | return; | |
392 | ||
393 | create_error: | |
394 | WARN_ON(1); | |
395 | return; /* not allowed to return error */ | |
396 | } | |
397 | ||
f4681817 MD |
398 | int lttng_abi_create_channel(int session_objd, |
399 | struct lttng_ust_channel *chan_param, | |
ef9ff354 | 400 | enum channel_type channel_type, |
f59ed768 MD |
401 | union ust_args *uargs, |
402 | void *owner) | |
f4681817 MD |
403 | { |
404 | struct ltt_session *session = objd_private(session_objd); | |
b61ce3b2 | 405 | const struct lttng_ust_objd_ops *ops; |
f4681817 MD |
406 | const char *transport_name; |
407 | struct ltt_channel *chan; | |
408 | int chan_objd; | |
409 | int ret = 0; | |
d028eddb | 410 | struct ltt_channel chan_priv_init; |
f4681817 | 411 | |
f4681817 MD |
412 | switch (channel_type) { |
413 | case PER_CPU_CHANNEL: | |
414 | if (chan_param->output == LTTNG_UST_MMAP) { | |
415 | transport_name = chan_param->overwrite ? | |
416 | "relay-overwrite-mmap" : "relay-discard-mmap"; | |
417 | } else { | |
418 | return -EINVAL; | |
419 | } | |
420 | ops = <tng_channel_ops; | |
421 | break; | |
422 | case METADATA_CHANNEL: | |
423 | if (chan_param->output == LTTNG_UST_MMAP) | |
424 | transport_name = "relay-metadata-mmap"; | |
425 | else | |
426 | return -EINVAL; | |
427 | ops = <tng_metadata_ops; | |
428 | break; | |
429 | default: | |
430 | transport_name = "<unknown>"; | |
fe38d4af MD |
431 | return -EINVAL; |
432 | } | |
f59ed768 | 433 | chan_objd = objd_alloc(NULL, ops, owner); |
fe38d4af MD |
434 | if (chan_objd < 0) { |
435 | ret = chan_objd; | |
436 | goto objd_error; | |
f4681817 | 437 | } |
d028eddb MD |
438 | memset(&chan_priv_init, 0, sizeof(chan_priv_init)); |
439 | /* Copy of session UUID for consumer (availability through shm) */ | |
440 | memcpy(chan_priv_init.uuid, session->uuid, sizeof(session->uuid)); | |
441 | ||
f4681817 MD |
442 | /* |
443 | * We tolerate no failure path after channel creation. It will stay | |
444 | * invariant for the rest of the session. | |
445 | */ | |
446 | chan = ltt_channel_create(session, transport_name, NULL, | |
447 | chan_param->subbuf_size, | |
448 | chan_param->num_subbuf, | |
449 | chan_param->switch_timer_interval, | |
193183fb | 450 | chan_param->read_timer_interval, |
ef9ff354 MD |
451 | &uargs->channel.shm_fd, |
452 | &uargs->channel.wait_fd, | |
453 | &uargs->channel.memory_map_size, | |
d028eddb | 454 | &chan_priv_init); |
f4681817 MD |
455 | if (!chan) { |
456 | ret = -EINVAL; | |
457 | goto chan_error; | |
458 | } | |
459 | objd_set_private(chan_objd, chan); | |
460 | chan->objd = chan_objd; | |
461 | if (channel_type == METADATA_CHANNEL) { | |
462 | session->metadata = chan; | |
463 | lttng_metadata_create_events(chan_objd); | |
464 | } | |
f4681817 MD |
465 | /* The channel created holds a reference on the session */ |
466 | objd_ref(session_objd); | |
467 | ||
468 | return chan_objd; | |
469 | ||
470 | chan_error: | |
1ea11eab MD |
471 | { |
472 | int err; | |
473 | ||
d4419b81 | 474 | err = lttng_ust_objd_unref(chan_objd); |
1ea11eab MD |
475 | assert(!err); |
476 | } | |
f4681817 MD |
477 | objd_error: |
478 | return ret; | |
479 | } | |
480 | ||
481 | /** | |
482 | * lttng_session_cmd - lttng session object command | |
483 | * | |
484 | * @obj: the object | |
485 | * @cmd: the command | |
486 | * @arg: command arg | |
ef9ff354 | 487 | * @uargs: UST arguments (internal) |
f59ed768 | 488 | * @owner: objd owner |
f4681817 MD |
489 | * |
490 | * This descriptor implements lttng commands: | |
491 | * LTTNG_UST_CHANNEL | |
492 | * Returns a LTTng channel object descriptor | |
493 | * LTTNG_UST_ENABLE | |
494 | * Enables tracing for a session (weak enable) | |
495 | * LTTNG_UST_DISABLE | |
496 | * Disables tracing for a session (strong disable) | |
497 | * LTTNG_UST_METADATA | |
498 | * Returns a LTTng metadata object descriptor | |
499 | * | |
500 | * The returned channel will be deleted when its file descriptor is closed. | |
501 | */ | |
502 | static | |
ef9ff354 | 503 | long lttng_session_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 504 | union ust_args *uargs, void *owner) |
f4681817 MD |
505 | { |
506 | struct ltt_session *session = objd_private(objd); | |
507 | ||
508 | switch (cmd) { | |
509 | case LTTNG_UST_CHANNEL: | |
510 | return lttng_abi_create_channel(objd, | |
511 | (struct lttng_ust_channel *) arg, | |
f59ed768 | 512 | PER_CPU_CHANNEL, uargs, owner); |
f4681817 MD |
513 | case LTTNG_UST_SESSION_START: |
514 | case LTTNG_UST_ENABLE: | |
515 | return ltt_session_enable(session); | |
516 | case LTTNG_UST_SESSION_STOP: | |
517 | case LTTNG_UST_DISABLE: | |
518 | return ltt_session_disable(session); | |
519 | case LTTNG_UST_METADATA: | |
520 | return lttng_abi_create_channel(objd, | |
521 | (struct lttng_ust_channel *) arg, | |
f59ed768 | 522 | METADATA_CHANNEL, uargs, owner); |
f4681817 MD |
523 | default: |
524 | return -EINVAL; | |
525 | } | |
526 | } | |
527 | ||
528 | /* | |
529 | * Called when the last file reference is dropped. | |
530 | * | |
531 | * Big fat note: channels and events are invariant for the whole session after | |
532 | * their creation. So this session destruction also destroys all channel and | |
533 | * event structures specific to this session (they are not destroyed when their | |
534 | * individual file is released). | |
535 | */ | |
536 | static | |
1ea11eab | 537 | int lttng_release_session(int objd) |
f4681817 MD |
538 | { |
539 | struct ltt_session *session = objd_private(objd); | |
540 | ||
1ea11eab | 541 | if (session) { |
f4681817 | 542 | ltt_session_destroy(session); |
1ea11eab MD |
543 | return 0; |
544 | } else { | |
545 | return -EINVAL; | |
546 | } | |
f4681817 MD |
547 | } |
548 | ||
b61ce3b2 | 549 | static const struct lttng_ust_objd_ops lttng_session_ops = { |
1ea11eab | 550 | .release = lttng_release_session, |
f4681817 MD |
551 | .cmd = lttng_session_cmd, |
552 | }; | |
553 | ||
51489cad | 554 | static |
ef9ff354 | 555 | long lttng_tracepoint_list_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 556 | union ust_args *uargs, void *owner) |
51489cad | 557 | { |
c8fcf224 | 558 | struct lttng_ust_tracepoint_list *list = objd_private(objd); |
cbef6901 MD |
559 | struct lttng_ust_tracepoint_iter *tp = |
560 | (struct lttng_ust_tracepoint_iter *) arg; | |
c8fcf224 | 561 | struct lttng_ust_tracepoint_iter *iter; |
51489cad MD |
562 | |
563 | switch (cmd) { | |
564 | case LTTNG_UST_TRACEPOINT_LIST_GET: | |
c8fcf224 MD |
565 | { |
566 | retry: | |
567 | iter = lttng_ust_tracepoint_list_get_iter_next(list); | |
568 | if (!iter) | |
7bc53e94 | 569 | return -LTTNG_UST_ERR_NOENT; |
c8fcf224 MD |
570 | if (!strcmp(iter->name, "lttng_ust:metadata")) |
571 | goto retry; | |
572 | memcpy(tp, iter, sizeof(*tp)); | |
51489cad | 573 | return 0; |
c8fcf224 | 574 | } |
51489cad MD |
575 | default: |
576 | return -EINVAL; | |
577 | } | |
578 | } | |
579 | ||
580 | static | |
f59ed768 | 581 | int lttng_abi_tracepoint_list(void *owner) |
51489cad MD |
582 | { |
583 | int list_objd, ret; | |
c8fcf224 | 584 | struct lttng_ust_tracepoint_list *list; |
51489cad | 585 | |
f59ed768 | 586 | list_objd = objd_alloc(NULL, <tng_tracepoint_list_ops, owner); |
51489cad MD |
587 | if (list_objd < 0) { |
588 | ret = list_objd; | |
589 | goto objd_error; | |
590 | } | |
591 | list = zmalloc(sizeof(*list)); | |
592 | if (!list) { | |
593 | ret = -ENOMEM; | |
594 | goto alloc_error; | |
595 | } | |
596 | objd_set_private(list_objd, list); | |
597 | ||
c8fcf224 MD |
598 | /* populate list by walking on all registered probes. */ |
599 | ret = ltt_probes_get_event_list(list); | |
600 | if (ret) { | |
601 | goto list_error; | |
602 | } | |
51489cad MD |
603 | return list_objd; |
604 | ||
c8fcf224 MD |
605 | list_error: |
606 | free(list); | |
51489cad MD |
607 | alloc_error: |
608 | { | |
609 | int err; | |
610 | ||
611 | err = lttng_ust_objd_unref(list_objd); | |
612 | assert(!err); | |
613 | } | |
614 | objd_error: | |
615 | return ret; | |
616 | } | |
617 | ||
618 | static | |
619 | int lttng_release_tracepoint_list(int objd) | |
620 | { | |
c8fcf224 | 621 | struct lttng_ust_tracepoint_list *list = objd_private(objd); |
51489cad MD |
622 | |
623 | if (list) { | |
c8fcf224 | 624 | ltt_probes_prune_event_list(list); |
51489cad MD |
625 | free(list); |
626 | return 0; | |
627 | } else { | |
628 | return -EINVAL; | |
629 | } | |
630 | } | |
631 | ||
632 | static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops = { | |
633 | .release = lttng_release_tracepoint_list, | |
634 | .cmd = lttng_tracepoint_list_cmd, | |
635 | }; | |
636 | ||
06d4f27e MD |
637 | static |
638 | long lttng_tracepoint_field_list_cmd(int objd, unsigned int cmd, | |
f59ed768 | 639 | unsigned long arg, union ust_args *uargs, void *owner) |
06d4f27e MD |
640 | { |
641 | struct lttng_ust_field_list *list = objd_private(objd); | |
40003310 | 642 | struct lttng_ust_field_iter *tp = &uargs->field_list.entry; |
06d4f27e MD |
643 | struct lttng_ust_field_iter *iter; |
644 | ||
645 | switch (cmd) { | |
646 | case LTTNG_UST_TRACEPOINT_FIELD_LIST_GET: | |
647 | { | |
648 | retry: | |
649 | iter = lttng_ust_field_list_get_iter_next(list); | |
650 | if (!iter) | |
7bc53e94 | 651 | return -LTTNG_UST_ERR_NOENT; |
06d4f27e MD |
652 | if (!strcmp(iter->event_name, "lttng_ust:metadata")) |
653 | goto retry; | |
654 | memcpy(tp, iter, sizeof(*tp)); | |
655 | return 0; | |
656 | } | |
657 | default: | |
658 | return -EINVAL; | |
659 | } | |
660 | } | |
661 | ||
662 | static | |
f59ed768 | 663 | int lttng_abi_tracepoint_field_list(void *owner) |
06d4f27e MD |
664 | { |
665 | int list_objd, ret; | |
666 | struct lttng_ust_field_list *list; | |
667 | ||
f59ed768 | 668 | list_objd = objd_alloc(NULL, <tng_tracepoint_field_list_ops, owner); |
06d4f27e MD |
669 | if (list_objd < 0) { |
670 | ret = list_objd; | |
671 | goto objd_error; | |
672 | } | |
673 | list = zmalloc(sizeof(*list)); | |
674 | if (!list) { | |
675 | ret = -ENOMEM; | |
676 | goto alloc_error; | |
677 | } | |
678 | objd_set_private(list_objd, list); | |
679 | ||
680 | /* populate list by walking on all registered probes. */ | |
681 | ret = ltt_probes_get_field_list(list); | |
682 | if (ret) { | |
683 | goto list_error; | |
684 | } | |
685 | return list_objd; | |
686 | ||
687 | list_error: | |
688 | free(list); | |
689 | alloc_error: | |
690 | { | |
691 | int err; | |
692 | ||
693 | err = lttng_ust_objd_unref(list_objd); | |
694 | assert(!err); | |
695 | } | |
696 | objd_error: | |
697 | return ret; | |
698 | } | |
699 | ||
700 | static | |
701 | int lttng_release_tracepoint_field_list(int objd) | |
702 | { | |
703 | struct lttng_ust_field_list *list = objd_private(objd); | |
704 | ||
705 | if (list) { | |
706 | ltt_probes_prune_field_list(list); | |
707 | free(list); | |
708 | return 0; | |
709 | } else { | |
710 | return -EINVAL; | |
711 | } | |
712 | } | |
713 | ||
714 | static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops = { | |
715 | .release = lttng_release_tracepoint_field_list, | |
716 | .cmd = lttng_tracepoint_field_list_cmd, | |
717 | }; | |
718 | ||
381c0f1e | 719 | struct stream_priv_data { |
4cfec15c | 720 | struct lttng_ust_lib_ring_buffer *buf; |
381c0f1e MD |
721 | struct ltt_channel *ltt_chan; |
722 | }; | |
723 | ||
f4681817 | 724 | static |
ef9ff354 | 725 | int lttng_abi_open_stream(int channel_objd, struct lttng_ust_stream *info, |
f59ed768 | 726 | union ust_args *uargs, void *owner) |
f4681817 MD |
727 | { |
728 | struct ltt_channel *channel = objd_private(channel_objd); | |
4cfec15c | 729 | struct lttng_ust_lib_ring_buffer *buf; |
381c0f1e | 730 | struct stream_priv_data *priv; |
f4681817 MD |
731 | int stream_objd, ret; |
732 | ||
381c0f1e | 733 | buf = channel->ops->buffer_read_open(channel->chan, channel->handle, |
ef9ff354 MD |
734 | &uargs->stream.shm_fd, |
735 | &uargs->stream.wait_fd, | |
736 | &uargs->stream.memory_map_size); | |
f4681817 MD |
737 | if (!buf) |
738 | return -ENOENT; | |
739 | ||
381c0f1e MD |
740 | priv = zmalloc(sizeof(*priv)); |
741 | if (!priv) { | |
742 | ret = -ENOMEM; | |
743 | goto alloc_error; | |
744 | } | |
745 | priv->buf = buf; | |
746 | priv->ltt_chan = channel; | |
f59ed768 | 747 | stream_objd = objd_alloc(priv, &lib_ring_buffer_objd_ops, owner); |
f4681817 MD |
748 | if (stream_objd < 0) { |
749 | ret = stream_objd; | |
750 | goto objd_error; | |
751 | } | |
381c0f1e MD |
752 | /* Hold a reference on the channel object descriptor */ |
753 | objd_ref(channel_objd); | |
f4681817 MD |
754 | return stream_objd; |
755 | ||
756 | objd_error: | |
381c0f1e MD |
757 | free(priv); |
758 | alloc_error: | |
759 | channel->ops->buffer_read_close(buf, channel->handle); | |
f4681817 MD |
760 | return ret; |
761 | } | |
f4681817 MD |
762 | |
763 | static | |
764 | int lttng_abi_create_event(int channel_objd, | |
f59ed768 MD |
765 | struct lttng_ust_event *event_param, |
766 | void *owner) | |
f4681817 MD |
767 | { |
768 | struct ltt_channel *channel = objd_private(channel_objd); | |
769 | struct ltt_event *event; | |
770 | int event_objd, ret; | |
771 | ||
772 | event_param->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
f59ed768 | 773 | event_objd = objd_alloc(NULL, <tng_event_ops, owner); |
f4681817 MD |
774 | if (event_objd < 0) { |
775 | ret = event_objd; | |
776 | goto objd_error; | |
777 | } | |
778 | /* | |
779 | * We tolerate no failure path after event creation. It will stay | |
780 | * invariant for the rest of the session. | |
781 | */ | |
2d78951a | 782 | ret = ltt_event_create(channel, event_param, &event); |
576599a0 | 783 | if (ret < 0) { |
f4681817 MD |
784 | goto event_error; |
785 | } | |
786 | objd_set_private(event_objd, event); | |
787 | /* The event holds a reference on the channel */ | |
788 | objd_ref(channel_objd); | |
789 | return event_objd; | |
790 | ||
791 | event_error: | |
1ea11eab MD |
792 | { |
793 | int err; | |
794 | ||
d4419b81 | 795 | err = lttng_ust_objd_unref(event_objd); |
1ea11eab MD |
796 | assert(!err); |
797 | } | |
f4681817 MD |
798 | objd_error: |
799 | return ret; | |
800 | } | |
801 | ||
e6c12e3d MD |
802 | static |
803 | int lttng_abi_create_wildcard(int channel_objd, | |
f59ed768 MD |
804 | struct lttng_ust_event *event_param, |
805 | void *owner) | |
e6c12e3d MD |
806 | { |
807 | struct ltt_channel *channel = objd_private(channel_objd); | |
808 | struct session_wildcard *wildcard; | |
809 | int wildcard_objd, ret; | |
810 | ||
811 | event_param->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
f59ed768 | 812 | wildcard_objd = objd_alloc(NULL, <tng_wildcard_ops, owner); |
e6c12e3d MD |
813 | if (wildcard_objd < 0) { |
814 | ret = wildcard_objd; | |
815 | goto objd_error; | |
816 | } | |
817 | /* | |
818 | * We tolerate no failure path after wildcard creation. It will | |
819 | * stay invariant for the rest of the session. | |
820 | */ | |
821 | ret = ltt_wildcard_create(channel, event_param, &wildcard); | |
822 | if (ret < 0) { | |
823 | goto wildcard_error; | |
824 | } | |
825 | objd_set_private(wildcard_objd, wildcard); | |
826 | /* The wildcard holds a reference on the channel */ | |
827 | objd_ref(channel_objd); | |
828 | return wildcard_objd; | |
829 | ||
830 | wildcard_error: | |
831 | { | |
832 | int err; | |
833 | ||
834 | err = lttng_ust_objd_unref(wildcard_objd); | |
835 | assert(!err); | |
836 | } | |
837 | objd_error: | |
838 | return ret; | |
839 | } | |
840 | ||
f4681817 MD |
841 | /** |
842 | * lttng_channel_cmd - lttng control through object descriptors | |
843 | * | |
844 | * @objd: the object descriptor | |
845 | * @cmd: the command | |
846 | * @arg: command arg | |
ef9ff354 | 847 | * @uargs: UST arguments (internal) |
f59ed768 | 848 | * @owner: objd owner |
f4681817 MD |
849 | * |
850 | * This object descriptor implements lttng commands: | |
851 | * LTTNG_UST_STREAM | |
852 | * Returns an event stream object descriptor or failure. | |
853 | * (typically, one event stream records events from one CPU) | |
854 | * LTTNG_UST_EVENT | |
855 | * Returns an event object descriptor or failure. | |
856 | * LTTNG_UST_CONTEXT | |
857 | * Prepend a context field to each event in the channel | |
858 | * LTTNG_UST_ENABLE | |
859 | * Enable recording for events in this channel (weak enable) | |
860 | * LTTNG_UST_DISABLE | |
861 | * Disable recording for events in this channel (strong disable) | |
862 | * | |
863 | * Channel and event file descriptors also hold a reference on the session. | |
864 | */ | |
865 | static | |
ef9ff354 | 866 | long lttng_channel_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 867 | union ust_args *uargs, void *owner) |
f4681817 MD |
868 | { |
869 | struct ltt_channel *channel = objd_private(objd); | |
870 | ||
871 | switch (cmd) { | |
872 | case LTTNG_UST_STREAM: | |
381c0f1e MD |
873 | { |
874 | struct lttng_ust_stream *stream; | |
875 | ||
876 | stream = (struct lttng_ust_stream *) arg; | |
877 | /* stream used as output */ | |
f59ed768 | 878 | return lttng_abi_open_stream(objd, stream, uargs, owner); |
381c0f1e | 879 | } |
f4681817 | 880 | case LTTNG_UST_EVENT: |
1f18504e MD |
881 | { |
882 | struct lttng_ust_event *event_param = | |
883 | (struct lttng_ust_event *) arg; | |
6b0e60f1 MD |
884 | if (event_param->name[strlen(event_param->name) - 1] == '*') { |
885 | /* If ends with wildcard, create wildcard. */ | |
f59ed768 MD |
886 | return lttng_abi_create_wildcard(objd, event_param, |
887 | owner); | |
1f18504e | 888 | } else { |
f59ed768 MD |
889 | return lttng_abi_create_event(objd, event_param, |
890 | owner); | |
1f18504e MD |
891 | } |
892 | } | |
f4681817 MD |
893 | case LTTNG_UST_CONTEXT: |
894 | return lttng_abi_add_context(objd, | |
895 | (struct lttng_ust_context *) arg, | |
896 | &channel->ctx, channel->session); | |
897 | case LTTNG_UST_ENABLE: | |
898 | return ltt_channel_enable(channel); | |
899 | case LTTNG_UST_DISABLE: | |
900 | return ltt_channel_disable(channel); | |
43d330a4 MD |
901 | case LTTNG_UST_FLUSH_BUFFER: |
902 | return channel->ops->flush_buffer(channel->chan, channel->handle); | |
f4681817 MD |
903 | default: |
904 | return -EINVAL; | |
905 | } | |
906 | } | |
907 | ||
908 | /** | |
909 | * lttng_metadata_cmd - lttng control through object descriptors | |
910 | * | |
911 | * @objd: the object descriptor | |
912 | * @cmd: the command | |
913 | * @arg: command arg | |
ef9ff354 | 914 | * @uargs: UST arguments (internal) |
f59ed768 | 915 | * @owner: objd owner |
f4681817 MD |
916 | * |
917 | * This object descriptor implements lttng commands: | |
918 | * LTTNG_UST_STREAM | |
919 | * Returns an event stream file descriptor or failure. | |
920 | * | |
921 | * Channel and event file descriptors also hold a reference on the session. | |
922 | */ | |
923 | static | |
ef9ff354 | 924 | long lttng_metadata_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 925 | union ust_args *uargs, void *owner) |
f4681817 | 926 | { |
43861eab MD |
927 | struct ltt_channel *channel = objd_private(objd); |
928 | ||
f4681817 MD |
929 | switch (cmd) { |
930 | case LTTNG_UST_STREAM: | |
381c0f1e MD |
931 | { |
932 | struct lttng_ust_stream *stream; | |
933 | ||
934 | stream = (struct lttng_ust_stream *) arg; | |
935 | /* stream used as output */ | |
f59ed768 | 936 | return lttng_abi_open_stream(objd, stream, uargs, owner); |
381c0f1e | 937 | } |
43d330a4 MD |
938 | case LTTNG_UST_FLUSH_BUFFER: |
939 | return channel->ops->flush_buffer(channel->chan, channel->handle); | |
f4681817 MD |
940 | default: |
941 | return -EINVAL; | |
942 | } | |
943 | } | |
944 | ||
945 | #if 0 | |
946 | /** | |
947 | * lttng_channel_poll - lttng stream addition/removal monitoring | |
948 | * | |
949 | * @file: the file | |
950 | * @wait: poll table | |
951 | */ | |
952 | unsigned int lttng_channel_poll(struct file *file, poll_table *wait) | |
953 | { | |
954 | struct ltt_channel *channel = file->private_data; | |
955 | unsigned int mask = 0; | |
956 | ||
957 | if (file->f_mode & FMODE_READ) { | |
958 | poll_wait_set_exclusive(wait); | |
959 | poll_wait(file, channel->ops->get_hp_wait_queue(channel->chan), | |
960 | wait); | |
961 | ||
962 | if (channel->ops->is_disabled(channel->chan)) | |
963 | return POLLERR; | |
964 | if (channel->ops->is_finalized(channel->chan)) | |
965 | return POLLHUP; | |
966 | if (channel->ops->buffer_has_read_closed_stream(channel->chan)) | |
967 | return POLLIN | POLLRDNORM; | |
968 | return 0; | |
969 | } | |
970 | return mask; | |
971 | ||
972 | } | |
973 | #endif //0 | |
974 | ||
975 | static | |
976 | int lttng_channel_release(int objd) | |
977 | { | |
978 | struct ltt_channel *channel = objd_private(objd); | |
979 | ||
980 | if (channel) | |
d4419b81 | 981 | return lttng_ust_objd_unref(channel->session->objd); |
f4681817 MD |
982 | return 0; |
983 | } | |
984 | ||
b61ce3b2 | 985 | static const struct lttng_ust_objd_ops lttng_channel_ops = { |
f4681817 MD |
986 | .release = lttng_channel_release, |
987 | //.poll = lttng_channel_poll, | |
988 | .cmd = lttng_channel_cmd, | |
989 | }; | |
990 | ||
b61ce3b2 | 991 | static const struct lttng_ust_objd_ops lttng_metadata_ops = { |
f4681817 MD |
992 | .release = lttng_channel_release, |
993 | .cmd = lttng_metadata_cmd, | |
994 | }; | |
995 | ||
381c0f1e MD |
996 | /** |
997 | * lttng_rb_cmd - lttng ring buffer control through object descriptors | |
998 | * | |
999 | * @objd: the object descriptor | |
1000 | * @cmd: the command | |
1001 | * @arg: command arg | |
ef9ff354 | 1002 | * @uargs: UST arguments (internal) |
f59ed768 | 1003 | * @owner: objd owner |
381c0f1e MD |
1004 | * |
1005 | * This object descriptor implements lttng commands: | |
1006 | * (None for now. Access is done directly though shm.) | |
381c0f1e MD |
1007 | */ |
1008 | static | |
ef9ff354 | 1009 | long lttng_rb_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 1010 | union ust_args *uargs, void *owner) |
381c0f1e | 1011 | { |
381c0f1e MD |
1012 | switch (cmd) { |
1013 | default: | |
1014 | return -EINVAL; | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | static | |
1019 | int lttng_rb_release(int objd) | |
1020 | { | |
1021 | struct stream_priv_data *priv = objd_private(objd); | |
4cfec15c | 1022 | struct lttng_ust_lib_ring_buffer *buf; |
381c0f1e MD |
1023 | struct ltt_channel *channel; |
1024 | ||
1025 | if (priv) { | |
1026 | buf = priv->buf; | |
1027 | channel = priv->ltt_chan; | |
1028 | free(priv); | |
45e9e699 MD |
1029 | /* |
1030 | * If we are at ABI exit, we don't want to close the | |
1031 | * buffer opened for read: it is being shared between | |
1032 | * the parent and child (right after fork), and we don't | |
1033 | * want the child to close it for the parent. For a real | |
1034 | * exit, we don't care about marking it as closed, as | |
1035 | * the consumer daemon (if there is one) will do fine | |
1036 | * even if we don't mark it as "closed" for reading on | |
1037 | * our side. | |
1038 | * We only mark it as closed if it is being explicitely | |
1039 | * released by the session daemon with an explicit | |
1040 | * release command. | |
1041 | */ | |
1042 | if (!lttng_ust_abi_close_in_progress) | |
1043 | channel->ops->buffer_read_close(buf, channel->handle); | |
381c0f1e | 1044 | |
d4419b81 | 1045 | return lttng_ust_objd_unref(channel->objd); |
381c0f1e MD |
1046 | } |
1047 | return 0; | |
1048 | } | |
1049 | ||
b61ce3b2 | 1050 | static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops = { |
381c0f1e MD |
1051 | .release = lttng_rb_release, |
1052 | .cmd = lttng_rb_cmd, | |
1053 | }; | |
1054 | ||
f4681817 MD |
1055 | /** |
1056 | * lttng_event_cmd - lttng control through object descriptors | |
1057 | * | |
1058 | * @objd: the object descriptor | |
1059 | * @cmd: the command | |
1060 | * @arg: command arg | |
ef9ff354 | 1061 | * @uargs: UST arguments (internal) |
f59ed768 | 1062 | * @owner: objd owner |
f4681817 MD |
1063 | * |
1064 | * This object descriptor implements lttng commands: | |
1065 | * LTTNG_UST_CONTEXT | |
1066 | * Prepend a context field to each record of this event | |
1067 | * LTTNG_UST_ENABLE | |
1068 | * Enable recording for this event (weak enable) | |
1069 | * LTTNG_UST_DISABLE | |
1070 | * Disable recording for this event (strong disable) | |
2d78951a MD |
1071 | * LTTNG_UST_FILTER |
1072 | * Attach a filter to an event. | |
f4681817 MD |
1073 | */ |
1074 | static | |
ef9ff354 | 1075 | long lttng_event_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 1076 | union ust_args *uargs, void *owner) |
f4681817 MD |
1077 | { |
1078 | struct ltt_event *event = objd_private(objd); | |
1079 | ||
1080 | switch (cmd) { | |
1081 | case LTTNG_UST_CONTEXT: | |
1082 | return lttng_abi_add_context(objd, | |
1083 | (struct lttng_ust_context *) arg, | |
1084 | &event->ctx, event->chan->session); | |
1085 | case LTTNG_UST_ENABLE: | |
1086 | return ltt_event_enable(event); | |
1087 | case LTTNG_UST_DISABLE: | |
1088 | return ltt_event_disable(event); | |
2d78951a MD |
1089 | case LTTNG_UST_FILTER: |
1090 | { | |
1091 | int ret; | |
1092 | ret = lttng_filter_event_attach_bytecode(event, | |
f488575f | 1093 | (struct lttng_ust_filter_bytecode_node *) arg); |
2d78951a MD |
1094 | if (ret) |
1095 | return ret; | |
f488575f | 1096 | lttng_filter_event_link_bytecode(event); |
2d78951a MD |
1097 | return 0; |
1098 | } | |
f4681817 MD |
1099 | default: |
1100 | return -EINVAL; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | static | |
1105 | int lttng_event_release(int objd) | |
1106 | { | |
1107 | struct ltt_event *event = objd_private(objd); | |
1108 | ||
1109 | if (event) | |
d4419b81 | 1110 | return lttng_ust_objd_unref(event->chan->objd); |
f4681817 MD |
1111 | return 0; |
1112 | } | |
1113 | ||
1114 | /* TODO: filter control ioctl */ | |
b61ce3b2 | 1115 | static const struct lttng_ust_objd_ops lttng_event_ops = { |
f4681817 MD |
1116 | .release = lttng_event_release, |
1117 | .cmd = lttng_event_cmd, | |
1118 | }; | |
1119 | ||
e6c12e3d MD |
1120 | /** |
1121 | * lttng_wildcard_cmd - lttng control through object descriptors | |
1122 | * | |
1123 | * @objd: the object descriptor | |
1124 | * @cmd: the command | |
1125 | * @arg: command arg | |
ef9ff354 | 1126 | * @uargs: UST arguments (internal) |
f59ed768 | 1127 | * @owner: objd owner |
e6c12e3d MD |
1128 | * |
1129 | * This object descriptor implements lttng commands: | |
1130 | * LTTNG_UST_CONTEXT | |
1131 | * Prepend a context field to each record of events of this | |
1132 | * wildcard. | |
1133 | * LTTNG_UST_ENABLE | |
1134 | * Enable recording for these wildcard events (weak enable) | |
1135 | * LTTNG_UST_DISABLE | |
1136 | * Disable recording for these wildcard events (strong disable) | |
2d78951a MD |
1137 | * LTTNG_UST_FILTER |
1138 | * Attach a filter to a wildcard. | |
e6c12e3d MD |
1139 | */ |
1140 | static | |
ef9ff354 | 1141 | long lttng_wildcard_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 1142 | union ust_args *uargs, void *owner) |
e6c12e3d MD |
1143 | { |
1144 | struct session_wildcard *wildcard = objd_private(objd); | |
1145 | ||
1146 | switch (cmd) { | |
1147 | case LTTNG_UST_CONTEXT: | |
1148 | return -ENOSYS; /* not implemented yet */ | |
1149 | #if 0 | |
1150 | return lttng_abi_add_context(objd, | |
1151 | (struct lttng_ust_context *) arg, | |
1152 | &wildcard->ctx, wildcard->chan->session); | |
1153 | #endif | |
1154 | case LTTNG_UST_ENABLE: | |
1155 | return ltt_wildcard_enable(wildcard); | |
1156 | case LTTNG_UST_DISABLE: | |
1157 | return ltt_wildcard_disable(wildcard); | |
2d78951a MD |
1158 | case LTTNG_UST_FILTER: |
1159 | { | |
1160 | int ret; | |
1161 | ||
1162 | ret = lttng_filter_wildcard_attach_bytecode(wildcard, | |
f488575f | 1163 | (struct lttng_ust_filter_bytecode_node *) arg); |
2d78951a MD |
1164 | if (ret) |
1165 | return ret; | |
1166 | lttng_filter_wildcard_link_bytecode(wildcard); | |
1167 | return 0; | |
1168 | } | |
e6c12e3d MD |
1169 | default: |
1170 | return -EINVAL; | |
1171 | } | |
1172 | } | |
1173 | ||
1174 | static | |
1175 | int lttng_wildcard_release(int objd) | |
1176 | { | |
1177 | struct session_wildcard *wildcard = objd_private(objd); | |
1178 | ||
1179 | if (wildcard) | |
1180 | return lttng_ust_objd_unref(wildcard->chan->objd); | |
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | /* TODO: filter control ioctl */ | |
1185 | static const struct lttng_ust_objd_ops lttng_wildcard_ops = { | |
1186 | .release = lttng_wildcard_release, | |
1187 | .cmd = lttng_wildcard_cmd, | |
1188 | }; | |
1189 | ||
b35d179d | 1190 | void lttng_ust_abi_exit(void) |
f4681817 | 1191 | { |
45e9e699 | 1192 | lttng_ust_abi_close_in_progress = 1; |
f4681817 | 1193 | objd_table_destroy(); |
45e9e699 | 1194 | lttng_ust_abi_close_in_progress = 0; |
f4681817 | 1195 | } |