Commit | Line | Data |
---|---|---|
57773204 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
74d81a6c | 3 | * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
57773204 | 4 | * |
e92f3e28 MD |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; version 2 of the License only. | |
57773204 MD |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
e92f3e28 MD |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
57773204 MD |
17 | */ |
18 | ||
9d335227 | 19 | #define _GNU_SOURCE |
57773204 | 20 | #include <string.h> |
4318ae1b MD |
21 | #include <lttng/ust-ctl.h> |
22 | #include <lttng/ust-abi.h> | |
c1fca457 | 23 | #include <lttng/ust-events.h> |
7a784989 | 24 | #include <sys/mman.h> |
44c72f10 MD |
25 | |
26 | #include <usterr-signal-safe.h> | |
b728d87e | 27 | #include <ust-comm.h> |
74d81a6c | 28 | #include <helper.h> |
57773204 MD |
29 | |
30 | #include "../libringbuffer/backend.h" | |
31 | #include "../libringbuffer/frontend.h" | |
32 | ||
74d81a6c MD |
33 | /* |
34 | * Channel representation within consumer. | |
35 | */ | |
36 | struct ustctl_consumer_channel { | |
37 | struct lttng_channel *chan; /* lttng channel buffers */ | |
6b120308 | 38 | |
74d81a6c MD |
39 | /* initial attributes */ |
40 | struct ustctl_consumer_channel_attr attr; | |
41 | }; | |
42 | ||
43 | /* | |
44 | * Stream representation within consumer. | |
45 | */ | |
46 | struct ustctl_consumer_stream { | |
47 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
48 | struct lttng_ust_lib_ring_buffer *buf; | |
49 | struct ustctl_consumer_channel *chan; | |
50 | int shm_fd, wait_fd, wakeup_fd; | |
51 | int cpu; | |
52 | uint64_t memory_map_size; | |
53 | }; | |
54 | ||
55 | extern void lttng_ring_buffer_client_overwrite_init(void); | |
56 | extern void lttng_ring_buffer_client_discard_init(void); | |
57 | extern void lttng_ring_buffer_metadata_client_init(void); | |
58 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
59 | extern void lttng_ring_buffer_client_discard_exit(void); | |
60 | extern void lttng_ring_buffer_metadata_client_exit(void); | |
61 | ||
62 | volatile enum ust_loglevel ust_loglevel; | |
57773204 | 63 | |
2be0e72c MD |
64 | int ustctl_release_handle(int sock, int handle) |
65 | { | |
66 | struct ustcomm_ust_msg lum; | |
67 | struct ustcomm_ust_reply lur; | |
2be0e72c | 68 | |
74d81a6c MD |
69 | if (sock < 0 || handle < 0) |
70 | return 0; | |
71 | memset(&lum, 0, sizeof(lum)); | |
72 | lum.handle = handle; | |
73 | lum.cmd = LTTNG_UST_RELEASE; | |
74 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 75 | } |
74d81a6c | 76 | |
12388166 MD |
77 | /* |
78 | * If sock is negative, it means we don't have to notify the other side | |
79 | * (e.g. application has already vanished). | |
80 | */ | |
d26228ae | 81 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 82 | { |
57773204 MD |
83 | int ret; |
84 | ||
9bfc503d MD |
85 | if (!data) |
86 | return -EINVAL; | |
87 | ||
74d81a6c MD |
88 | switch (data->type) { |
89 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
90 | free(data->u.channel.data); | |
91 | break; | |
92 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
93 | if (data->u.stream.shm_fd >= 0) { | |
94 | ret = close(data->u.stream.shm_fd); | |
95 | if (ret < 0) { | |
96 | ret = -errno; | |
97 | return ret; | |
98 | } | |
d26228ae | 99 | } |
74d81a6c MD |
100 | if (data->u.stream.wakeup_fd >= 0) { |
101 | ret = close(data->u.stream.wakeup_fd); | |
102 | if (ret < 0) { | |
103 | ret = -errno; | |
104 | return ret; | |
105 | } | |
d26228ae | 106 | } |
74d81a6c MD |
107 | break; |
108 | default: | |
109 | assert(0); | |
d26228ae | 110 | } |
2be0e72c | 111 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
112 | } |
113 | ||
1c5e467e MD |
114 | /* |
115 | * Send registration done packet to the application. | |
116 | */ | |
117 | int ustctl_register_done(int sock) | |
118 | { | |
119 | struct ustcomm_ust_msg lum; | |
120 | struct ustcomm_ust_reply lur; | |
121 | int ret; | |
122 | ||
123 | DBG("Sending register done command to %d", sock); | |
124 | memset(&lum, 0, sizeof(lum)); | |
125 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
126 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
127 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
128 | if (ret) | |
129 | return ret; | |
1c5e467e | 130 | return 0; |
1c5e467e MD |
131 | } |
132 | ||
57773204 MD |
133 | /* |
134 | * returns session handle. | |
135 | */ | |
136 | int ustctl_create_session(int sock) | |
137 | { | |
138 | struct ustcomm_ust_msg lum; | |
139 | struct ustcomm_ust_reply lur; | |
140 | int ret, session_handle; | |
141 | ||
142 | /* Create session */ | |
143 | memset(&lum, 0, sizeof(lum)); | |
144 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
145 | lum.cmd = LTTNG_UST_SESSION; | |
146 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
147 | if (ret) | |
148 | return ret; | |
149 | session_handle = lur.ret_val; | |
150 | DBG("received session handle %u", session_handle); | |
151 | return session_handle; | |
152 | } | |
153 | ||
57773204 | 154 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
155 | struct lttng_ust_object_data *channel_data, |
156 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
157 | { |
158 | struct ustcomm_ust_msg lum; | |
159 | struct ustcomm_ust_reply lur; | |
61f02aea | 160 | struct lttng_ust_object_data *event_data; |
57773204 MD |
161 | int ret; |
162 | ||
9bfc503d MD |
163 | if (!channel_data || !_event_data) |
164 | return -EINVAL; | |
165 | ||
74d81a6c | 166 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
167 | if (!event_data) |
168 | return -ENOMEM; | |
57773204 MD |
169 | memset(&lum, 0, sizeof(lum)); |
170 | lum.handle = channel_data->handle; | |
171 | lum.cmd = LTTNG_UST_EVENT; | |
172 | strncpy(lum.u.event.name, ev->name, | |
173 | LTTNG_UST_SYM_NAME_LEN); | |
174 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
175 | lum.u.event.loglevel_type = ev->loglevel_type; |
176 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
177 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
178 | if (ret) { | |
179 | free(event_data); | |
180 | return ret; | |
181 | } | |
182 | event_data->handle = lur.ret_val; | |
183 | DBG("received event handle %u", event_data->handle); | |
184 | *_event_data = event_data; | |
185 | return 0; | |
186 | } | |
187 | ||
188 | int ustctl_add_context(int sock, struct lttng_ust_context *ctx, | |
61f02aea MD |
189 | struct lttng_ust_object_data *obj_data, |
190 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
191 | { |
192 | struct ustcomm_ust_msg lum; | |
193 | struct ustcomm_ust_reply lur; | |
61f02aea | 194 | struct lttng_ust_object_data *context_data; |
57773204 MD |
195 | int ret; |
196 | ||
9bfc503d MD |
197 | if (!obj_data || !_context_data) |
198 | return -EINVAL; | |
199 | ||
74d81a6c | 200 | context_data = zmalloc(sizeof(*context_data)); |
57773204 MD |
201 | if (!context_data) |
202 | return -ENOMEM; | |
57773204 | 203 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 204 | lum.handle = obj_data->handle; |
57773204 MD |
205 | lum.cmd = LTTNG_UST_CONTEXT; |
206 | lum.u.context.ctx = ctx->ctx; | |
207 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
208 | if (ret) { | |
209 | free(context_data); | |
210 | return ret; | |
211 | } | |
212 | context_data->handle = lur.ret_val; | |
213 | DBG("received context handle %u", context_data->handle); | |
214 | *_context_data = context_data; | |
215 | return ret; | |
216 | } | |
217 | ||
cd54f6d9 MD |
218 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
219 | struct lttng_ust_object_data *obj_data) | |
220 | { | |
221 | struct ustcomm_ust_msg lum; | |
222 | struct ustcomm_ust_reply lur; | |
223 | int ret; | |
224 | ||
225 | if (!obj_data) | |
226 | return -EINVAL; | |
227 | ||
228 | memset(&lum, 0, sizeof(lum)); | |
229 | lum.handle = obj_data->handle; | |
230 | lum.cmd = LTTNG_UST_FILTER; | |
231 | lum.u.filter.data_size = bytecode->len; | |
232 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 233 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
234 | |
235 | ret = ustcomm_send_app_msg(sock, &lum); | |
236 | if (ret) | |
237 | return ret; | |
cd54f6d9 MD |
238 | /* send var len bytecode */ |
239 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
240 | bytecode->len); | |
241 | if (ret < 0) { | |
7bc53e94 MD |
242 | if (ret == -ECONNRESET) |
243 | fprintf(stderr, "remote end closed connection\n"); | |
cd54f6d9 MD |
244 | return ret; |
245 | } | |
7bc53e94 MD |
246 | if (ret != bytecode->len) |
247 | return -EINVAL; | |
248 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
249 | } |
250 | ||
57773204 | 251 | /* Enable event, channel and session ioctl */ |
61f02aea | 252 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
253 | { |
254 | struct ustcomm_ust_msg lum; | |
255 | struct ustcomm_ust_reply lur; | |
256 | int ret; | |
257 | ||
9bfc503d MD |
258 | if (!object) |
259 | return -EINVAL; | |
260 | ||
57773204 MD |
261 | memset(&lum, 0, sizeof(lum)); |
262 | lum.handle = object->handle; | |
263 | lum.cmd = LTTNG_UST_ENABLE; | |
264 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
265 | if (ret) | |
266 | return ret; | |
267 | DBG("enabled handle %u", object->handle); | |
268 | return 0; | |
269 | } | |
270 | ||
271 | /* Disable event, channel and session ioctl */ | |
61f02aea | 272 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
273 | { |
274 | struct ustcomm_ust_msg lum; | |
275 | struct ustcomm_ust_reply lur; | |
276 | int ret; | |
277 | ||
9bfc503d MD |
278 | if (!object) |
279 | return -EINVAL; | |
280 | ||
57773204 MD |
281 | memset(&lum, 0, sizeof(lum)); |
282 | lum.handle = object->handle; | |
283 | lum.cmd = LTTNG_UST_DISABLE; | |
284 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
285 | if (ret) | |
286 | return ret; | |
287 | DBG("disable handle %u", object->handle); | |
288 | return 0; | |
289 | } | |
290 | ||
4a6ca058 | 291 | int ustctl_start_session(int sock, int handle) |
57773204 | 292 | { |
61f02aea | 293 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
294 | |
295 | obj.handle = handle; | |
296 | return ustctl_enable(sock, &obj); | |
57773204 MD |
297 | } |
298 | ||
4a6ca058 | 299 | int ustctl_stop_session(int sock, int handle) |
57773204 | 300 | { |
61f02aea | 301 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
302 | |
303 | obj.handle = handle; | |
304 | return ustctl_disable(sock, &obj); | |
57773204 MD |
305 | } |
306 | ||
57773204 MD |
307 | int ustctl_tracepoint_list(int sock) |
308 | { | |
b115631f MD |
309 | struct ustcomm_ust_msg lum; |
310 | struct ustcomm_ust_reply lur; | |
311 | int ret, tp_list_handle; | |
312 | ||
313 | memset(&lum, 0, sizeof(lum)); | |
314 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
315 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
316 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
317 | if (ret) | |
318 | return ret; | |
319 | tp_list_handle = lur.ret_val; | |
320 | DBG("received tracepoint list handle %u", tp_list_handle); | |
321 | return tp_list_handle; | |
322 | } | |
323 | ||
324 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 325 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
326 | { |
327 | struct ustcomm_ust_msg lum; | |
328 | struct ustcomm_ust_reply lur; | |
329 | int ret; | |
330 | ||
9bfc503d MD |
331 | if (!iter) |
332 | return -EINVAL; | |
333 | ||
b115631f MD |
334 | memset(&lum, 0, sizeof(lum)); |
335 | lum.handle = tp_list_handle; | |
336 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
337 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
338 | if (ret) | |
339 | return ret; | |
882a56d7 | 340 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 341 | lur.u.tracepoint.name, |
882a56d7 | 342 | lur.u.tracepoint.loglevel); |
cbef6901 | 343 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 344 | return 0; |
57773204 MD |
345 | } |
346 | ||
40003310 MD |
347 | int ustctl_tracepoint_field_list(int sock) |
348 | { | |
349 | struct ustcomm_ust_msg lum; | |
350 | struct ustcomm_ust_reply lur; | |
351 | int ret, tp_field_list_handle; | |
352 | ||
353 | memset(&lum, 0, sizeof(lum)); | |
354 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
355 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
356 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
357 | if (ret) | |
358 | return ret; | |
359 | tp_field_list_handle = lur.ret_val; | |
360 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
361 | return tp_field_list_handle; | |
362 | } | |
363 | ||
364 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
365 | struct lttng_ust_field_iter *iter) | |
366 | { | |
367 | struct ustcomm_ust_msg lum; | |
368 | struct ustcomm_ust_reply lur; | |
369 | int ret; | |
370 | ssize_t len; | |
371 | ||
372 | if (!iter) | |
373 | return -EINVAL; | |
374 | ||
375 | memset(&lum, 0, sizeof(lum)); | |
376 | lum.handle = tp_field_list_handle; | |
377 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
378 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
379 | if (ret) | |
380 | return ret; | |
381 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
382 | if (len != sizeof(*iter)) { | |
383 | return -EINVAL; | |
384 | } | |
385 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
386 | iter->event_name, | |
387 | iter->loglevel, | |
388 | iter->field_name, | |
389 | iter->type); | |
390 | return 0; | |
391 | } | |
392 | ||
57773204 MD |
393 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
394 | { | |
395 | struct ustcomm_ust_msg lum; | |
396 | struct ustcomm_ust_reply lur; | |
397 | int ret; | |
398 | ||
9bfc503d MD |
399 | if (!v) |
400 | return -EINVAL; | |
401 | ||
57773204 MD |
402 | memset(&lum, 0, sizeof(lum)); |
403 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
404 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
405 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
406 | if (ret) | |
407 | return ret; | |
408 | memcpy(v, &lur.u.version, sizeof(*v)); | |
409 | DBG("received tracer version"); | |
410 | return 0; | |
411 | } | |
412 | ||
413 | int ustctl_wait_quiescent(int sock) | |
414 | { | |
415 | struct ustcomm_ust_msg lum; | |
416 | struct ustcomm_ust_reply lur; | |
417 | int ret; | |
418 | ||
419 | memset(&lum, 0, sizeof(lum)); | |
420 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
421 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
422 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
423 | if (ret) | |
424 | return ret; | |
425 | DBG("waited for quiescent state"); | |
426 | return 0; | |
427 | } | |
428 | ||
429 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
430 | { | |
9bfc503d MD |
431 | if (!calibrate) |
432 | return -EINVAL; | |
433 | ||
57773204 MD |
434 | return -ENOSYS; |
435 | } | |
436 | ||
f1fffc57 MD |
437 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
438 | { | |
439 | struct ustcomm_ust_msg lum; | |
440 | struct ustcomm_ust_reply lur; | |
441 | int ret; | |
442 | ||
9bfc503d MD |
443 | if (!object) |
444 | return -EINVAL; | |
445 | ||
f1fffc57 MD |
446 | memset(&lum, 0, sizeof(lum)); |
447 | lum.handle = object->handle; | |
448 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
449 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
450 | if (ret) | |
451 | return ret; | |
452 | DBG("flushed buffer handle %u", object->handle); | |
453 | return 0; | |
454 | } | |
455 | ||
74d81a6c MD |
456 | static |
457 | int ustctl_send_channel(int sock, | |
458 | enum lttng_ust_chan_type type, | |
459 | void *data, | |
460 | uint64_t size, | |
461 | int send_fd_only) | |
462 | { | |
463 | ssize_t len; | |
464 | ||
465 | if (!send_fd_only) { | |
466 | /* Send mmap size */ | |
467 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
468 | if (len != sizeof(size)) { | |
469 | if (len < 0) | |
470 | return len; | |
471 | else | |
472 | return -EIO; | |
473 | } | |
474 | ||
475 | /* Send channel type */ | |
476 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
477 | if (len != sizeof(type)) { | |
478 | if (len < 0) | |
479 | return len; | |
480 | else | |
481 | return -EIO; | |
482 | } | |
483 | } | |
484 | ||
485 | /* Send channel data */ | |
486 | len = ustcomm_send_unix_sock(sock, data, size); | |
487 | if (len != size) { | |
488 | if (len < 0) | |
489 | return len; | |
490 | else | |
491 | return -EIO; | |
492 | } | |
57773204 | 493 | |
74d81a6c MD |
494 | return 0; |
495 | } | |
496 | ||
497 | static | |
498 | int ustctl_send_stream(int sock, | |
499 | uint32_t stream_nr, | |
500 | uint64_t memory_map_size, | |
501 | int shm_fd, int wakeup_fd, | |
502 | int send_fd_only) | |
57773204 | 503 | { |
74d81a6c MD |
504 | ssize_t len; |
505 | int fds[2]; | |
506 | ||
507 | if (!send_fd_only) { | |
508 | if (shm_fd < 0) { | |
509 | /* finish iteration */ | |
510 | uint64_t v = -1; | |
511 | ||
512 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
513 | if (len != sizeof(v)) { | |
514 | if (len < 0) | |
515 | return len; | |
516 | else | |
517 | return -EIO; | |
518 | } | |
519 | return 0; | |
520 | } | |
521 | ||
522 | /* Send mmap size */ | |
523 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
524 | sizeof(memory_map_size)); | |
525 | if (len != sizeof(memory_map_size)) { | |
526 | if (len < 0) | |
527 | return len; | |
528 | else | |
529 | return -EIO; | |
530 | } | |
531 | ||
532 | /* Send stream nr */ | |
533 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
534 | sizeof(stream_nr)); | |
535 | if (len != sizeof(stream_nr)) { | |
536 | if (len < 0) | |
537 | return len; | |
538 | else | |
539 | return -EIO; | |
540 | } | |
541 | } | |
542 | ||
543 | /* Send shm fd and wakeup fd */ | |
544 | fds[0] = shm_fd; | |
545 | fds[1] = wakeup_fd; | |
546 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
547 | if (len <= 0) { | |
548 | if (len < 0) | |
549 | return len; | |
550 | else | |
551 | return -EIO; | |
552 | } | |
553 | return 0; | |
554 | } | |
555 | ||
556 | int ustctl_recv_channel_from_consumer(int sock, | |
557 | struct lttng_ust_object_data **_channel_data) | |
558 | { | |
559 | struct lttng_ust_object_data *channel_data; | |
560 | ssize_t len; | |
7a784989 | 561 | int ret; |
57773204 | 562 | |
74d81a6c MD |
563 | channel_data = zmalloc(sizeof(*channel_data)); |
564 | if (!channel_data) { | |
565 | ret = -ENOMEM; | |
566 | goto error_alloc; | |
567 | } | |
568 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
569 | ||
570 | /* recv mmap size */ | |
571 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
572 | sizeof(channel_data->size)); | |
573 | if (len != sizeof(channel_data->size)) { | |
574 | if (len < 0) | |
575 | ret = len; | |
576 | else | |
577 | ret = -EINVAL; | |
578 | goto error; | |
579 | } | |
9bfc503d | 580 | |
74d81a6c MD |
581 | /* recv channel type */ |
582 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
583 | sizeof(channel_data->u.channel.type)); | |
584 | if (len != sizeof(channel_data->u.channel.type)) { | |
585 | if (len < 0) | |
586 | ret = len; | |
587 | else | |
588 | ret = -EINVAL; | |
589 | goto error; | |
590 | } | |
591 | ||
592 | /* recv channel data */ | |
593 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
594 | if (!channel_data->u.channel.data) { | |
595 | ret = -ENOMEM; | |
596 | goto error; | |
597 | } | |
598 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
599 | channel_data->size); | |
600 | if (len != channel_data->size) { | |
601 | if (len < 0) | |
602 | ret = len; | |
603 | else | |
604 | ret = -EINVAL; | |
605 | goto error_recv_data; | |
606 | } | |
607 | ||
608 | *_channel_data = channel_data; | |
609 | return 0; | |
610 | ||
611 | error_recv_data: | |
612 | free(channel_data->u.channel.data); | |
613 | error: | |
614 | free(channel_data); | |
615 | error_alloc: | |
616 | return ret; | |
617 | } | |
618 | ||
619 | int ustctl_recv_stream_from_consumer(int sock, | |
620 | struct lttng_ust_object_data **_stream_data) | |
621 | { | |
622 | struct lttng_ust_object_data *stream_data; | |
623 | ssize_t len; | |
624 | int ret; | |
625 | int fds[2]; | |
626 | ||
627 | stream_data = zmalloc(sizeof(*stream_data)); | |
628 | if (!stream_data) { | |
629 | ret = -ENOMEM; | |
630 | goto error_alloc; | |
57773204 | 631 | } |
74d81a6c MD |
632 | |
633 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
634 | stream_data->handle = -1; | |
635 | ||
636 | /* recv mmap size */ | |
637 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
638 | sizeof(stream_data->size)); | |
639 | if (len != sizeof(stream_data->size)) { | |
640 | if (len < 0) | |
641 | ret = len; | |
642 | else | |
643 | ret = -EINVAL; | |
644 | goto error; | |
645 | } | |
646 | if (stream_data->size == -1) { | |
647 | ret = -LTTNG_UST_ERR_NOENT; | |
648 | goto error; | |
649 | } | |
650 | ||
651 | /* recv stream nr */ | |
652 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
653 | sizeof(stream_data->u.stream.stream_nr)); | |
654 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
655 | if (len < 0) | |
656 | ret = len; | |
657 | else | |
658 | ret = -EINVAL; | |
659 | goto error; | |
660 | } | |
661 | ||
662 | /* recv shm fd and wakeup fd */ | |
663 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
664 | if (len <= 0) { | |
665 | if (len < 0) { | |
666 | ret = len; | |
667 | goto error; | |
668 | } else { | |
669 | ret = -EIO; | |
670 | goto error; | |
0bfe09ec | 671 | } |
0bfe09ec | 672 | } |
74d81a6c MD |
673 | stream_data->u.stream.shm_fd = fds[0]; |
674 | stream_data->u.stream.wakeup_fd = fds[1]; | |
675 | *_stream_data = stream_data; | |
676 | return 0; | |
0bfe09ec | 677 | |
74d81a6c MD |
678 | error: |
679 | free(stream_data); | |
680 | error_alloc: | |
681 | return ret; | |
682 | } | |
683 | ||
684 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
685 | struct lttng_ust_object_data *channel_data) | |
686 | { | |
687 | struct ustcomm_ust_msg lum; | |
688 | struct ustcomm_ust_reply lur; | |
689 | int ret; | |
690 | ||
691 | if (!channel_data) | |
692 | return -EINVAL; | |
693 | ||
694 | memset(&lum, 0, sizeof(lum)); | |
695 | lum.handle = session_handle; | |
696 | lum.cmd = LTTNG_UST_CHANNEL; | |
697 | lum.u.channel.len = channel_data->size; | |
698 | lum.u.channel.type = channel_data->u.channel.type; | |
699 | ret = ustcomm_send_app_msg(sock, &lum); | |
700 | if (ret) | |
701 | return ret; | |
702 | ||
703 | ret = ustctl_send_channel(sock, | |
704 | channel_data->u.channel.type, | |
705 | channel_data->u.channel.data, | |
706 | channel_data->size, | |
707 | 1); | |
708 | if (ret) | |
709 | return ret; | |
710 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
711 | if (!ret) { | |
712 | if (lur.ret_val >= 0) { | |
713 | channel_data->handle = lur.ret_val; | |
714 | } | |
57773204 | 715 | } |
74d81a6c MD |
716 | return ret; |
717 | } | |
718 | ||
719 | int ustctl_send_stream_to_ust(int sock, | |
720 | struct lttng_ust_object_data *channel_data, | |
721 | struct lttng_ust_object_data *stream_data) | |
722 | { | |
723 | struct ustcomm_ust_msg lum; | |
724 | struct ustcomm_ust_reply lur; | |
725 | int ret; | |
726 | ||
727 | memset(&lum, 0, sizeof(lum)); | |
728 | lum.handle = channel_data->handle; | |
729 | lum.cmd = LTTNG_UST_STREAM; | |
730 | lum.u.stream.len = stream_data->size; | |
731 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
732 | ret = ustcomm_send_app_msg(sock, &lum); | |
733 | if (ret) | |
734 | return ret; | |
735 | ||
736 | assert(stream_data); | |
737 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
738 | ||
739 | ret = ustctl_send_stream(sock, | |
740 | stream_data->u.stream.stream_nr, | |
741 | stream_data->size, | |
742 | stream_data->u.stream.shm_fd, | |
743 | stream_data->u.stream.wakeup_fd, 1); | |
744 | if (ret) | |
745 | return ret; | |
746 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
747 | } | |
748 | ||
749 | ||
750 | /* Buffer operations */ | |
751 | ||
752 | struct ustctl_consumer_channel * | |
753 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr) | |
754 | { | |
755 | struct ustctl_consumer_channel *chan; | |
756 | const char *transport_name; | |
757 | struct lttng_transport *transport; | |
758 | ||
759 | switch (attr->type) { | |
760 | case LTTNG_UST_CHAN_PER_CPU: | |
761 | if (attr->output == LTTNG_UST_MMAP) { | |
762 | transport_name = attr->overwrite ? | |
763 | "relay-overwrite-mmap" : "relay-discard-mmap"; | |
764 | } else { | |
765 | return NULL; | |
766 | } | |
c1fca457 | 767 | break; |
74d81a6c MD |
768 | case LTTNG_UST_CHAN_METADATA: |
769 | if (attr->output == LTTNG_UST_MMAP) | |
770 | transport_name = "relay-metadata-mmap"; | |
771 | else | |
772 | return NULL; | |
c1fca457 MD |
773 | break; |
774 | default: | |
74d81a6c | 775 | transport_name = "<unknown>"; |
c1fca457 MD |
776 | return NULL; |
777 | } | |
74d81a6c MD |
778 | |
779 | transport = lttng_transport_find(transport_name); | |
780 | if (!transport) { | |
781 | DBG("LTTng transport %s not found\n", | |
782 | transport_name); | |
783 | return NULL; | |
7a784989 | 784 | } |
74d81a6c MD |
785 | |
786 | chan = zmalloc(sizeof(*chan)); | |
787 | if (!chan) | |
788 | return NULL; | |
789 | ||
790 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
791 | attr->subbuf_size, attr->num_subbuf, | |
792 | attr->switch_timer_interval, | |
793 | attr->read_timer_interval, | |
794 | attr->uuid); | |
795 | if (!chan->chan) { | |
796 | goto chan_error; | |
797 | } | |
798 | chan->chan->ops = &transport->ops; | |
799 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
800 | return chan; | |
801 | ||
802 | chan_error: | |
803 | free(chan); | |
804 | return NULL; | |
57773204 MD |
805 | } |
806 | ||
74d81a6c | 807 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 808 | { |
74d81a6c MD |
809 | chan->chan->ops->channel_destroy(chan->chan); |
810 | free(chan); | |
811 | } | |
812 | ||
813 | int ustctl_send_channel_to_sessiond(int sock, | |
814 | struct ustctl_consumer_channel *channel) | |
815 | { | |
816 | struct shm_object_table *table; | |
57773204 | 817 | |
74d81a6c MD |
818 | table = channel->chan->handle->table; |
819 | if (table->size <= 0) | |
9bfc503d | 820 | return -EINVAL; |
74d81a6c MD |
821 | return ustctl_send_channel(sock, |
822 | channel->attr.type, | |
823 | table->objects[0].memory_map, | |
824 | table->objects[0].memory_map_size, | |
825 | 0); | |
826 | } | |
9bfc503d | 827 | |
74d81a6c MD |
828 | int ustctl_send_stream_to_sessiond(int sock, |
829 | struct ustctl_consumer_stream *stream) | |
830 | { | |
831 | if (!stream) | |
832 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
833 | ||
834 | return ustctl_send_stream(sock, | |
835 | stream->cpu, | |
836 | stream->memory_map_size, | |
837 | stream->shm_fd, stream->wakeup_fd, | |
838 | 0); | |
57773204 MD |
839 | } |
840 | ||
74d81a6c | 841 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
842 | { |
843 | struct channel *chan; | |
844 | ||
74d81a6c MD |
845 | chan = stream->chan->chan->chan; |
846 | return ring_buffer_close_wait_fd(&chan->backend.config, | |
847 | chan, stream->handle, stream->cpu); | |
5224b5c8 MD |
848 | } |
849 | ||
74d81a6c | 850 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 851 | { |
66bdd22a | 852 | struct channel *chan; |
74d81a6c MD |
853 | |
854 | chan = stream->chan->chan->chan; | |
855 | return ring_buffer_close_wakeup_fd(&chan->backend.config, | |
856 | chan, stream->handle, stream->cpu); | |
857 | } | |
858 | ||
859 | struct ustctl_consumer_stream * | |
860 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
861 | int cpu) | |
862 | { | |
863 | struct ustctl_consumer_stream *stream; | |
864 | struct lttng_ust_shm_handle *handle; | |
865 | struct channel *chan; | |
866 | int shm_fd, wait_fd, wakeup_fd; | |
867 | uint64_t memory_map_size; | |
4cfec15c | 868 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
869 | int ret; |
870 | ||
74d81a6c MD |
871 | if (!channel) |
872 | return NULL; | |
873 | handle = channel->chan->handle; | |
9bfc503d MD |
874 | if (!handle) |
875 | return NULL; | |
876 | ||
74d81a6c | 877 | chan = channel->chan->chan; |
6e922b24 | 878 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
879 | chan, cpu, handle, &shm_fd, &wait_fd, |
880 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
881 | if (!buf) |
882 | return NULL; | |
74d81a6c | 883 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
884 | if (ret) |
885 | return NULL; | |
74d81a6c MD |
886 | |
887 | stream = zmalloc(sizeof(*stream)); | |
888 | if (!stream) | |
889 | goto alloc_error; | |
890 | stream->handle = handle; | |
891 | stream->buf = buf; | |
892 | stream->chan = channel; | |
893 | stream->shm_fd = shm_fd; | |
894 | stream->wait_fd = wait_fd; | |
895 | stream->wakeup_fd = wakeup_fd; | |
896 | stream->memory_map_size = memory_map_size; | |
897 | stream->cpu = cpu; | |
898 | return stream; | |
899 | ||
900 | alloc_error: | |
901 | return NULL; | |
902 | } | |
903 | ||
904 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
905 | { | |
906 | struct lttng_ust_lib_ring_buffer *buf; | |
907 | struct ustctl_consumer_channel *consumer_chan; | |
908 | ||
909 | assert(stream); | |
910 | buf = stream->buf; | |
911 | consumer_chan = stream->chan; | |
912 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); | |
913 | free(stream); | |
6e922b24 MD |
914 | } |
915 | ||
74d81a6c | 916 | int ustctl_get_wait_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 917 | { |
74d81a6c MD |
918 | struct lttng_ust_lib_ring_buffer *buf; |
919 | struct ustctl_consumer_channel *consumer_chan; | |
920 | ||
921 | if (!stream) | |
922 | return -EINVAL; | |
923 | buf = stream->buf; | |
924 | consumer_chan = stream->chan; | |
925 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
926 | } | |
927 | ||
928 | int ustctl_get_wakeup_fd(struct ustctl_consumer_stream *stream) | |
929 | { | |
930 | struct lttng_ust_lib_ring_buffer *buf; | |
931 | struct ustctl_consumer_channel *consumer_chan; | |
932 | ||
933 | if (!stream) | |
934 | return -EINVAL; | |
935 | buf = stream->buf; | |
936 | consumer_chan = stream->chan; | |
937 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
938 | } |
939 | ||
57773204 MD |
940 | /* For mmap mode, readable without "get" operation */ |
941 | ||
74d81a6c | 942 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 943 | { |
74d81a6c MD |
944 | struct lttng_ust_lib_ring_buffer *buf; |
945 | struct ustctl_consumer_channel *consumer_chan; | |
946 | ||
947 | if (!stream) | |
9bfc503d | 948 | return NULL; |
74d81a6c MD |
949 | buf = stream->buf; |
950 | consumer_chan = stream->chan; | |
951 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
952 | } |
953 | ||
57773204 | 954 | /* returns the length to mmap. */ |
74d81a6c | 955 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
956 | unsigned long *len) |
957 | { | |
74d81a6c | 958 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 959 | unsigned long mmap_buf_len; |
66bdd22a | 960 | struct channel *chan; |
57773204 | 961 | |
74d81a6c | 962 | if (!stream) |
9bfc503d | 963 | return -EINVAL; |
74d81a6c MD |
964 | consumer_chan = stream->chan; |
965 | chan = consumer_chan->chan->chan; | |
57773204 MD |
966 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
967 | return -EINVAL; | |
968 | mmap_buf_len = chan->backend.buf_size; | |
969 | if (chan->backend.extra_reader_sb) | |
970 | mmap_buf_len += chan->backend.subbuf_size; | |
971 | if (mmap_buf_len > INT_MAX) | |
972 | return -EFBIG; | |
973 | *len = mmap_buf_len; | |
974 | return 0; | |
975 | } | |
976 | ||
977 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 978 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
979 | unsigned long *len) |
980 | { | |
74d81a6c | 981 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 982 | struct channel *chan; |
57773204 | 983 | |
74d81a6c | 984 | if (!stream) |
9bfc503d | 985 | return -EINVAL; |
74d81a6c MD |
986 | consumer_chan = stream->chan; |
987 | chan = consumer_chan->chan->chan; | |
57773204 MD |
988 | *len = chan->backend.subbuf_size; |
989 | return 0; | |
990 | } | |
991 | ||
992 | /* | |
993 | * For mmap mode, operate on the current packet (between get/put or | |
994 | * get_next/put_next). | |
995 | */ | |
996 | ||
997 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
998 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
999 | unsigned long *off) | |
57773204 | 1000 | { |
66bdd22a | 1001 | struct channel *chan; |
57773204 | 1002 | unsigned long sb_bindex; |
74d81a6c MD |
1003 | struct lttng_ust_lib_ring_buffer *buf; |
1004 | struct ustctl_consumer_channel *consumer_chan; | |
57773204 | 1005 | |
74d81a6c | 1006 | if (!stream) |
9bfc503d | 1007 | return -EINVAL; |
74d81a6c MD |
1008 | buf = stream->buf; |
1009 | consumer_chan = stream->chan; | |
1010 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1011 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1012 | return -EINVAL; | |
1013 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
1014 | buf->backend.buf_rsb.id); | |
74d81a6c MD |
1015 | *off = shmp(consumer_chan->chan->handle, |
1016 | shmp_index(consumer_chan->chan->handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset; | |
57773204 MD |
1017 | return 0; |
1018 | } | |
1019 | ||
1020 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1021 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1022 | unsigned long *len) | |
57773204 | 1023 | { |
74d81a6c | 1024 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1025 | struct channel *chan; |
74d81a6c | 1026 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1027 | |
74d81a6c | 1028 | if (!stream) |
9bfc503d MD |
1029 | return -EINVAL; |
1030 | ||
74d81a6c MD |
1031 | buf = stream->buf; |
1032 | consumer_chan = stream->chan; | |
1033 | chan = consumer_chan->chan->chan; | |
57773204 | 1034 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1035 | consumer_chan->chan->handle); |
57773204 MD |
1036 | return 0; |
1037 | } | |
1038 | ||
1039 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1040 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1041 | unsigned long *len) | |
57773204 | 1042 | { |
74d81a6c | 1043 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1044 | struct channel *chan; |
74d81a6c | 1045 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1046 | |
74d81a6c | 1047 | if (!stream) |
9bfc503d | 1048 | return -EINVAL; |
74d81a6c MD |
1049 | buf = stream->buf; |
1050 | consumer_chan = stream->chan; | |
1051 | chan = consumer_chan->chan->chan; | |
57773204 | 1052 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1053 | consumer_chan->chan->handle); |
57773204 MD |
1054 | *len = PAGE_ALIGN(*len); |
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1059 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1060 | { |
74d81a6c MD |
1061 | struct lttng_ust_lib_ring_buffer *buf; |
1062 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1063 | |
74d81a6c MD |
1064 | if (!stream) |
1065 | return -EINVAL; | |
1066 | buf = stream->buf; | |
1067 | consumer_chan = stream->chan; | |
1068 | return lib_ring_buffer_get_next_subbuf(buf, | |
1069 | consumer_chan->chan->handle); | |
57773204 MD |
1070 | } |
1071 | ||
1072 | ||
1073 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1074 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1075 | { |
74d81a6c MD |
1076 | struct lttng_ust_lib_ring_buffer *buf; |
1077 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1078 | |
74d81a6c MD |
1079 | if (!stream) |
1080 | return -EINVAL; | |
1081 | buf = stream->buf; | |
1082 | consumer_chan = stream->chan; | |
1083 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1084 | return 0; |
1085 | } | |
1086 | ||
1087 | /* snapshot */ | |
1088 | ||
1089 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1090 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1091 | { |
74d81a6c MD |
1092 | struct lttng_ust_lib_ring_buffer *buf; |
1093 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1094 | |
74d81a6c MD |
1095 | if (!stream) |
1096 | return -EINVAL; | |
1097 | buf = stream->buf; | |
1098 | consumer_chan = stream->chan; | |
57773204 | 1099 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1100 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1101 | } |
1102 | ||
1103 | /* Get the consumer position (iteration start) */ | |
74d81a6c MD |
1104 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1105 | unsigned long *pos) | |
57773204 | 1106 | { |
74d81a6c | 1107 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1108 | |
74d81a6c MD |
1109 | if (!stream) |
1110 | return -EINVAL; | |
1111 | buf = stream->buf; | |
57773204 MD |
1112 | *pos = buf->cons_snapshot; |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1117 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1118 | unsigned long *pos) | |
57773204 | 1119 | { |
74d81a6c | 1120 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1121 | |
74d81a6c MD |
1122 | if (!stream) |
1123 | return -EINVAL; | |
1124 | buf = stream->buf; | |
57773204 MD |
1125 | *pos = buf->prod_snapshot; |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1130 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1131 | unsigned long *pos) | |
57773204 | 1132 | { |
74d81a6c MD |
1133 | struct lttng_ust_lib_ring_buffer *buf; |
1134 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1135 | |
74d81a6c MD |
1136 | if (!stream) |
1137 | return -EINVAL; | |
1138 | buf = stream->buf; | |
1139 | consumer_chan = stream->chan; | |
1140 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1141 | consumer_chan->chan->handle); | |
57773204 MD |
1142 | } |
1143 | ||
1144 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1145 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1146 | { |
74d81a6c MD |
1147 | struct lttng_ust_lib_ring_buffer *buf; |
1148 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1149 | |
74d81a6c MD |
1150 | if (!stream) |
1151 | return -EINVAL; | |
1152 | buf = stream->buf; | |
1153 | consumer_chan = stream->chan; | |
1154 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1155 | return 0; |
1156 | } | |
1157 | ||
74d81a6c | 1158 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1159 | int producer_active) |
57773204 | 1160 | { |
74d81a6c MD |
1161 | struct lttng_ust_lib_ring_buffer *buf; |
1162 | struct ustctl_consumer_channel *consumer_chan; | |
1163 | ||
1164 | assert(stream); | |
1165 | buf = stream->buf; | |
1166 | consumer_chan = stream->chan; | |
b52190f2 MD |
1167 | lib_ring_buffer_switch_slow(buf, |
1168 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1169 | consumer_chan->chan->handle); |
1170 | } | |
1171 | ||
1172 | static __attribute__((constructor)) | |
1173 | void ustctl_init(void) | |
1174 | { | |
1175 | init_usterr(); | |
1176 | lttng_ring_buffer_metadata_client_init(); | |
1177 | lttng_ring_buffer_client_overwrite_init(); | |
1178 | lttng_ring_buffer_client_discard_init(); | |
1179 | } | |
1180 | ||
1181 | static __attribute__((destructor)) | |
1182 | void ustctl_exit(void) | |
1183 | { | |
1184 | lttng_ring_buffer_client_discard_exit(); | |
1185 | lttng_ring_buffer_client_overwrite_exit(); | |
1186 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 1187 | } |