Commit | Line | Data |
---|---|---|
57773204 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
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> |
57773204 MD |
28 | |
29 | #include "../libringbuffer/backend.h" | |
30 | #include "../libringbuffer/frontend.h" | |
31 | ||
6b120308 MD |
32 | volatile enum ust_loglevel ust_loglevel; |
33 | ||
42100b84 CB |
34 | static int dummy_pipe[2]; |
35 | ||
36 | static | |
37 | void __attribute__((constructor)) setup_dummy_pipe(void) | |
38 | { | |
39 | pipe(dummy_pipe); | |
40 | /* Only dummy_pipe[0] is used */ | |
41 | close(dummy_pipe[1]); | |
42 | /* FIXME: Handle pipe() failure */ | |
43 | } | |
44 | ||
45 | static | |
46 | inline int get_dummy_fd(void) | |
47 | { | |
48 | return dup(dummy_pipe[0]); | |
49 | } | |
50 | ||
57773204 | 51 | static |
61f02aea | 52 | void init_object(struct lttng_ust_object_data *data) |
57773204 MD |
53 | { |
54 | data->handle = -1; | |
55 | data->shm_fd = -1; | |
bf5ff35e | 56 | data->shm_path = NULL; |
57773204 | 57 | data->wait_fd = -1; |
bf5ff35e | 58 | data->wait_pipe_path = NULL; |
57773204 MD |
59 | data->memory_map_size = 0; |
60 | } | |
61 | ||
2be0e72c MD |
62 | int ustctl_release_handle(int sock, int handle) |
63 | { | |
64 | struct ustcomm_ust_msg lum; | |
65 | struct ustcomm_ust_reply lur; | |
66 | int ret; | |
67 | ||
68 | if (sock >= 0) { | |
69 | memset(&lum, 0, sizeof(lum)); | |
70 | lum.handle = handle; | |
71 | lum.cmd = LTTNG_UST_RELEASE; | |
72 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
73 | if (ret < 0) { | |
74 | return ret; | |
75 | } | |
76 | } | |
77 | return 0; | |
78 | } | |
12388166 MD |
79 | /* |
80 | * If sock is negative, it means we don't have to notify the other side | |
81 | * (e.g. application has already vanished). | |
82 | */ | |
d26228ae | 83 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 84 | { |
57773204 MD |
85 | int ret; |
86 | ||
9bfc503d MD |
87 | if (!data) |
88 | return -EINVAL; | |
89 | ||
d26228ae MD |
90 | if (data->shm_fd >= 0) { |
91 | ret = close(data->shm_fd); | |
92 | if (ret < 0) { | |
93 | return ret; | |
94 | } | |
95 | } | |
bf5ff35e CB |
96 | |
97 | if (data->shm_path) { | |
98 | free(data->shm_path); | |
99 | } | |
100 | ||
d26228ae MD |
101 | if (data->wait_fd >= 0) { |
102 | ret = close(data->wait_fd); | |
103 | if (ret < 0) { | |
104 | return ret; | |
105 | } | |
106 | } | |
bf5ff35e CB |
107 | |
108 | if (data->wait_pipe_path) { | |
109 | free(data->wait_pipe_path); | |
110 | } | |
111 | ||
2be0e72c | 112 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
113 | } |
114 | ||
1c5e467e MD |
115 | /* |
116 | * Send registration done packet to the application. | |
117 | */ | |
118 | int ustctl_register_done(int sock) | |
119 | { | |
120 | struct ustcomm_ust_msg lum; | |
121 | struct ustcomm_ust_reply lur; | |
122 | int ret; | |
123 | ||
124 | DBG("Sending register done command to %d", sock); | |
125 | memset(&lum, 0, sizeof(lum)); | |
126 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
127 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
128 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
129 | if (ret) | |
130 | return ret; | |
131 | if (lur.ret_code != USTCOMM_OK) { | |
132 | DBG("Return code: %s", ustcomm_get_readable_code(lur.ret_code)); | |
133 | goto error; | |
134 | } | |
135 | return 0; | |
136 | ||
137 | error: | |
138 | return -1; | |
139 | } | |
140 | ||
57773204 MD |
141 | /* |
142 | * returns session handle. | |
143 | */ | |
144 | int ustctl_create_session(int sock) | |
145 | { | |
146 | struct ustcomm_ust_msg lum; | |
147 | struct ustcomm_ust_reply lur; | |
148 | int ret, session_handle; | |
149 | ||
150 | /* Create session */ | |
151 | memset(&lum, 0, sizeof(lum)); | |
152 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
153 | lum.cmd = LTTNG_UST_SESSION; | |
154 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
155 | if (ret) | |
156 | return ret; | |
157 | session_handle = lur.ret_val; | |
158 | DBG("received session handle %u", session_handle); | |
159 | return session_handle; | |
160 | } | |
161 | ||
162 | /* open the metadata global channel */ | |
163 | int ustctl_open_metadata(int sock, int session_handle, | |
164 | struct lttng_ust_channel_attr *chops, | |
61f02aea | 165 | struct lttng_ust_object_data **_metadata_data) |
57773204 MD |
166 | { |
167 | struct ustcomm_ust_msg lum; | |
168 | struct ustcomm_ust_reply lur; | |
61f02aea | 169 | struct lttng_ust_object_data *metadata_data; |
eeee05f3 | 170 | int ret, err = 0; |
bf5ff35e | 171 | char *shm_path, *wait_pipe_path; |
57773204 | 172 | |
9bfc503d MD |
173 | if (!chops || !_metadata_data) |
174 | return -EINVAL; | |
175 | ||
57773204 MD |
176 | metadata_data = malloc(sizeof(*metadata_data)); |
177 | if (!metadata_data) | |
178 | return -ENOMEM; | |
179 | init_object(metadata_data); | |
180 | /* Create metadata channel */ | |
181 | memset(&lum, 0, sizeof(lum)); | |
182 | lum.handle = session_handle; | |
183 | lum.cmd = LTTNG_UST_METADATA; | |
184 | lum.u.channel.overwrite = chops->overwrite; | |
185 | lum.u.channel.subbuf_size = chops->subbuf_size; | |
186 | lum.u.channel.num_subbuf = chops->num_subbuf; | |
187 | lum.u.channel.switch_timer_interval = chops->switch_timer_interval; | |
188 | lum.u.channel.read_timer_interval = chops->read_timer_interval; | |
189 | lum.u.channel.output = chops->output; | |
190 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
191 | if (ret) { | |
192 | free(metadata_data); | |
193 | return ret; | |
194 | } | |
195 | if (lur.ret_code != USTCOMM_OK) { | |
196 | free(metadata_data); | |
197 | return lur.ret_code; | |
198 | } | |
199 | metadata_data->handle = lur.ret_val; | |
200 | DBG("received metadata handle %u", metadata_data->handle); | |
201 | metadata_data->memory_map_size = lur.u.channel.memory_map_size; | |
bf5ff35e CB |
202 | /* get shm path */ |
203 | shm_path = ustcomm_recv_string(sock); | |
204 | if (!shm_path) { | |
eeee05f3 | 205 | err = 1; |
bf5ff35e CB |
206 | } else { |
207 | DBG("Received shm path: %s\n", shm_path); | |
42100b84 | 208 | metadata_data->shm_fd = get_dummy_fd(); |
bf5ff35e CB |
209 | metadata_data->shm_path = shm_path; |
210 | } | |
211 | ||
eeee05f3 MD |
212 | /* |
213 | * We need to get the second FD even if the first fails, because | |
214 | * libust expects us to read the two FDs. | |
215 | */ | |
bf5ff35e CB |
216 | |
217 | /* get wait pipe path */ | |
218 | wait_pipe_path = ustcomm_recv_string(sock); | |
219 | if (!wait_pipe_path) { | |
220 | free(shm_path); | |
eeee05f3 | 221 | err = 1; |
bf5ff35e CB |
222 | } else { |
223 | DBG("Received wait pipe path: %s\n", wait_pipe_path); | |
42100b84 | 224 | metadata_data->wait_fd = get_dummy_fd(); |
bf5ff35e CB |
225 | metadata_data->wait_pipe_path = wait_pipe_path; |
226 | } | |
227 | ||
228 | ||
eeee05f3 | 229 | if (err) |
57773204 | 230 | goto error; |
57773204 MD |
231 | *_metadata_data = metadata_data; |
232 | return 0; | |
233 | ||
234 | error: | |
d26228ae | 235 | (void) ustctl_release_object(sock, metadata_data); |
38970582 | 236 | free(metadata_data); |
57773204 MD |
237 | return -EINVAL; |
238 | } | |
239 | ||
240 | int ustctl_create_channel(int sock, int session_handle, | |
241 | struct lttng_ust_channel_attr *chops, | |
61f02aea | 242 | struct lttng_ust_object_data **_channel_data) |
57773204 MD |
243 | { |
244 | struct ustcomm_ust_msg lum; | |
245 | struct ustcomm_ust_reply lur; | |
61f02aea | 246 | struct lttng_ust_object_data *channel_data; |
eeee05f3 | 247 | int ret, err = 0; |
bf5ff35e | 248 | char *shm_path, *wait_pipe_path; |
57773204 | 249 | |
9bfc503d MD |
250 | if (!chops || !_channel_data) |
251 | return -EINVAL; | |
252 | ||
57773204 MD |
253 | channel_data = malloc(sizeof(*channel_data)); |
254 | if (!channel_data) | |
255 | return -ENOMEM; | |
256 | init_object(channel_data); | |
257 | /* Create metadata channel */ | |
258 | memset(&lum, 0, sizeof(lum)); | |
259 | lum.handle = session_handle; | |
260 | lum.cmd = LTTNG_UST_CHANNEL; | |
261 | lum.u.channel.overwrite = chops->overwrite; | |
262 | lum.u.channel.subbuf_size = chops->subbuf_size; | |
263 | lum.u.channel.num_subbuf = chops->num_subbuf; | |
264 | lum.u.channel.switch_timer_interval = chops->switch_timer_interval; | |
265 | lum.u.channel.read_timer_interval = chops->read_timer_interval; | |
266 | lum.u.channel.output = chops->output; | |
267 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
268 | if (ret) { | |
269 | free(channel_data); | |
270 | return ret; | |
271 | } | |
272 | if (lur.ret_code != USTCOMM_OK) { | |
273 | free(channel_data); | |
274 | return lur.ret_code; | |
275 | } | |
276 | channel_data->handle = lur.ret_val; | |
277 | DBG("received channel handle %u", channel_data->handle); | |
278 | channel_data->memory_map_size = lur.u.channel.memory_map_size; | |
bf5ff35e CB |
279 | /* get shm path */ |
280 | shm_path = ustcomm_recv_string(sock); | |
281 | if (!shm_path) { | |
eeee05f3 | 282 | err = 1; |
bf5ff35e CB |
283 | } else { |
284 | DBG("Received shm path: %s\n", shm_path); | |
42100b84 | 285 | channel_data->shm_fd = get_dummy_fd(); |
bf5ff35e CB |
286 | channel_data->shm_path = shm_path; |
287 | } | |
288 | ||
eeee05f3 MD |
289 | /* |
290 | * We need to get the second FD even if the first fails, because | |
291 | * libust expects us to read the two FDs. | |
292 | */ | |
bf5ff35e CB |
293 | /* get wait pipe path */ |
294 | wait_pipe_path = ustcomm_recv_string(sock); | |
295 | if (!wait_pipe_path) { | |
296 | free(shm_path); | |
eeee05f3 | 297 | err = 1; |
bf5ff35e CB |
298 | } else { |
299 | DBG("Received wait pipe path: %s\n", wait_pipe_path); | |
42100b84 | 300 | channel_data->wait_fd = get_dummy_fd(); |
bf5ff35e CB |
301 | channel_data->wait_pipe_path = wait_pipe_path; |
302 | } | |
303 | ||
eeee05f3 | 304 | if (err) |
57773204 | 305 | goto error; |
57773204 MD |
306 | *_channel_data = channel_data; |
307 | return 0; | |
308 | ||
309 | error: | |
d26228ae | 310 | (void) ustctl_release_object(sock, channel_data); |
38970582 | 311 | free(channel_data); |
57773204 MD |
312 | return -EINVAL; |
313 | } | |
314 | ||
315 | /* | |
316 | * Return -ENOENT if no more stream is available for creation. | |
317 | * Return 0 on success. | |
318 | * Return negative error value on error. | |
319 | */ | |
61f02aea MD |
320 | int ustctl_create_stream(int sock, struct lttng_ust_object_data *channel_data, |
321 | struct lttng_ust_object_data **_stream_data) | |
57773204 MD |
322 | { |
323 | struct ustcomm_ust_msg lum; | |
324 | struct ustcomm_ust_reply lur; | |
61f02aea | 325 | struct lttng_ust_object_data *stream_data; |
bf5ff35e CB |
326 | int ret, err = 0; |
327 | char *shm_path, *wait_pipe_path; | |
57773204 | 328 | |
9bfc503d MD |
329 | if (!channel_data || !_stream_data) |
330 | return -EINVAL; | |
331 | ||
57773204 MD |
332 | stream_data = malloc(sizeof(*stream_data)); |
333 | if (!stream_data) | |
334 | return -ENOMEM; | |
335 | init_object(stream_data); | |
336 | memset(&lum, 0, sizeof(lum)); | |
337 | lum.handle = channel_data->handle; | |
338 | lum.cmd = LTTNG_UST_STREAM; | |
339 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
340 | if (ret) { | |
341 | free(stream_data); | |
342 | return ret; | |
343 | } | |
344 | if (lur.ret_code != USTCOMM_OK) { | |
345 | free(stream_data); | |
346 | return lur.ret_code; | |
347 | } | |
348 | ||
349 | stream_data->handle = lur.ret_val; | |
350 | DBG("received stream handle %u", stream_data->handle); | |
351 | stream_data->memory_map_size = lur.u.stream.memory_map_size; | |
bf5ff35e CB |
352 | /* get shm path */ |
353 | shm_path = ustcomm_recv_string(sock); | |
354 | if (!shm_path) { | |
eeee05f3 | 355 | err = 1; |
bf5ff35e CB |
356 | } else { |
357 | DBG("Received shm path: %s\n", shm_path); | |
42100b84 | 358 | stream_data->shm_fd = get_dummy_fd(); |
bf5ff35e CB |
359 | stream_data->shm_path = shm_path; |
360 | } | |
361 | ||
eeee05f3 MD |
362 | /* |
363 | * We need to get the second FD even if the first fails, because | |
364 | * libust expects us to read the two FDs. | |
365 | */ | |
bf5ff35e CB |
366 | /* get wait pipe path */ |
367 | wait_pipe_path = ustcomm_recv_string(sock); | |
368 | if (!wait_pipe_path) { | |
369 | free(shm_path); | |
eeee05f3 | 370 | err = 1; |
bf5ff35e CB |
371 | } else { |
372 | DBG("Received wait pipe path: %s\n", wait_pipe_path); | |
42100b84 | 373 | stream_data->wait_fd = get_dummy_fd(); |
bf5ff35e CB |
374 | stream_data->wait_pipe_path = wait_pipe_path; |
375 | } | |
376 | ||
eeee05f3 | 377 | if (err) |
57773204 | 378 | goto error; |
57773204 MD |
379 | *_stream_data = stream_data; |
380 | return ret; | |
381 | ||
382 | error: | |
d26228ae | 383 | (void) ustctl_release_object(sock, stream_data); |
38970582 | 384 | free(stream_data); |
57773204 MD |
385 | return -EINVAL; |
386 | } | |
387 | ||
388 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, | |
61f02aea MD |
389 | struct lttng_ust_object_data *channel_data, |
390 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
391 | { |
392 | struct ustcomm_ust_msg lum; | |
393 | struct ustcomm_ust_reply lur; | |
61f02aea | 394 | struct lttng_ust_object_data *event_data; |
57773204 MD |
395 | int ret; |
396 | ||
9bfc503d MD |
397 | if (!channel_data || !_event_data) |
398 | return -EINVAL; | |
399 | ||
57773204 MD |
400 | event_data = malloc(sizeof(*event_data)); |
401 | if (!event_data) | |
402 | return -ENOMEM; | |
403 | init_object(event_data); | |
404 | memset(&lum, 0, sizeof(lum)); | |
405 | lum.handle = channel_data->handle; | |
406 | lum.cmd = LTTNG_UST_EVENT; | |
407 | strncpy(lum.u.event.name, ev->name, | |
408 | LTTNG_UST_SYM_NAME_LEN); | |
409 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
410 | lum.u.event.loglevel_type = ev->loglevel_type; |
411 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
412 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
413 | if (ret) { | |
414 | free(event_data); | |
415 | return ret; | |
416 | } | |
417 | event_data->handle = lur.ret_val; | |
418 | DBG("received event handle %u", event_data->handle); | |
419 | *_event_data = event_data; | |
420 | return 0; | |
421 | } | |
422 | ||
423 | int ustctl_add_context(int sock, struct lttng_ust_context *ctx, | |
61f02aea MD |
424 | struct lttng_ust_object_data *obj_data, |
425 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
426 | { |
427 | struct ustcomm_ust_msg lum; | |
428 | struct ustcomm_ust_reply lur; | |
61f02aea | 429 | struct lttng_ust_object_data *context_data; |
57773204 MD |
430 | int ret; |
431 | ||
9bfc503d MD |
432 | if (!obj_data || !_context_data) |
433 | return -EINVAL; | |
434 | ||
57773204 MD |
435 | context_data = malloc(sizeof(*context_data)); |
436 | if (!context_data) | |
437 | return -ENOMEM; | |
438 | init_object(context_data); | |
439 | memset(&lum, 0, sizeof(lum)); | |
3039d8ed | 440 | lum.handle = obj_data->handle; |
57773204 MD |
441 | lum.cmd = LTTNG_UST_CONTEXT; |
442 | lum.u.context.ctx = ctx->ctx; | |
443 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
444 | if (ret) { | |
445 | free(context_data); | |
446 | return ret; | |
447 | } | |
448 | context_data->handle = lur.ret_val; | |
449 | DBG("received context handle %u", context_data->handle); | |
450 | *_context_data = context_data; | |
451 | return ret; | |
452 | } | |
453 | ||
454 | /* Enable event, channel and session ioctl */ | |
61f02aea | 455 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
456 | { |
457 | struct ustcomm_ust_msg lum; | |
458 | struct ustcomm_ust_reply lur; | |
459 | int ret; | |
460 | ||
9bfc503d MD |
461 | if (!object) |
462 | return -EINVAL; | |
463 | ||
57773204 MD |
464 | memset(&lum, 0, sizeof(lum)); |
465 | lum.handle = object->handle; | |
466 | lum.cmd = LTTNG_UST_ENABLE; | |
467 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
468 | if (ret) | |
469 | return ret; | |
470 | DBG("enabled handle %u", object->handle); | |
471 | return 0; | |
472 | } | |
473 | ||
474 | /* Disable event, channel and session ioctl */ | |
61f02aea | 475 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
476 | { |
477 | struct ustcomm_ust_msg lum; | |
478 | struct ustcomm_ust_reply lur; | |
479 | int ret; | |
480 | ||
9bfc503d MD |
481 | if (!object) |
482 | return -EINVAL; | |
483 | ||
57773204 MD |
484 | memset(&lum, 0, sizeof(lum)); |
485 | lum.handle = object->handle; | |
486 | lum.cmd = LTTNG_UST_DISABLE; | |
487 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
488 | if (ret) | |
489 | return ret; | |
490 | DBG("disable handle %u", object->handle); | |
491 | return 0; | |
492 | } | |
493 | ||
4a6ca058 | 494 | int ustctl_start_session(int sock, int handle) |
57773204 | 495 | { |
61f02aea | 496 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
497 | |
498 | obj.handle = handle; | |
499 | return ustctl_enable(sock, &obj); | |
57773204 MD |
500 | } |
501 | ||
4a6ca058 | 502 | int ustctl_stop_session(int sock, int handle) |
57773204 | 503 | { |
61f02aea | 504 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
505 | |
506 | obj.handle = handle; | |
507 | return ustctl_disable(sock, &obj); | |
57773204 MD |
508 | } |
509 | ||
57773204 MD |
510 | int ustctl_tracepoint_list(int sock) |
511 | { | |
b115631f MD |
512 | struct ustcomm_ust_msg lum; |
513 | struct ustcomm_ust_reply lur; | |
514 | int ret, tp_list_handle; | |
515 | ||
516 | memset(&lum, 0, sizeof(lum)); | |
517 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
518 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
519 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
520 | if (ret) | |
521 | return ret; | |
522 | tp_list_handle = lur.ret_val; | |
523 | DBG("received tracepoint list handle %u", tp_list_handle); | |
524 | return tp_list_handle; | |
525 | } | |
526 | ||
527 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 528 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
529 | { |
530 | struct ustcomm_ust_msg lum; | |
531 | struct ustcomm_ust_reply lur; | |
532 | int ret; | |
533 | ||
9bfc503d MD |
534 | if (!iter) |
535 | return -EINVAL; | |
536 | ||
b115631f MD |
537 | memset(&lum, 0, sizeof(lum)); |
538 | lum.handle = tp_list_handle; | |
539 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
540 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
541 | if (ret) | |
542 | return ret; | |
882a56d7 | 543 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 544 | lur.u.tracepoint.name, |
882a56d7 | 545 | lur.u.tracepoint.loglevel); |
cbef6901 | 546 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 547 | return 0; |
57773204 MD |
548 | } |
549 | ||
550 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) | |
551 | { | |
552 | struct ustcomm_ust_msg lum; | |
553 | struct ustcomm_ust_reply lur; | |
554 | int ret; | |
555 | ||
9bfc503d MD |
556 | if (!v) |
557 | return -EINVAL; | |
558 | ||
57773204 MD |
559 | memset(&lum, 0, sizeof(lum)); |
560 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
561 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
562 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
563 | if (ret) | |
564 | return ret; | |
565 | memcpy(v, &lur.u.version, sizeof(*v)); | |
566 | DBG("received tracer version"); | |
567 | return 0; | |
568 | } | |
569 | ||
570 | int ustctl_wait_quiescent(int sock) | |
571 | { | |
572 | struct ustcomm_ust_msg lum; | |
573 | struct ustcomm_ust_reply lur; | |
574 | int ret; | |
575 | ||
576 | memset(&lum, 0, sizeof(lum)); | |
577 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
578 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
579 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
580 | if (ret) | |
581 | return ret; | |
582 | DBG("waited for quiescent state"); | |
583 | return 0; | |
584 | } | |
585 | ||
586 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
587 | { | |
9bfc503d MD |
588 | if (!calibrate) |
589 | return -EINVAL; | |
590 | ||
57773204 MD |
591 | return -ENOSYS; |
592 | } | |
593 | ||
f1fffc57 MD |
594 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
595 | { | |
596 | struct ustcomm_ust_msg lum; | |
597 | struct ustcomm_ust_reply lur; | |
598 | int ret; | |
599 | ||
9bfc503d MD |
600 | if (!object) |
601 | return -EINVAL; | |
602 | ||
f1fffc57 MD |
603 | memset(&lum, 0, sizeof(lum)); |
604 | lum.handle = object->handle; | |
605 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
606 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
607 | if (ret) | |
608 | return ret; | |
609 | DBG("flushed buffer handle %u", object->handle); | |
610 | return 0; | |
611 | } | |
612 | ||
57773204 MD |
613 | /* Buffer operations */ |
614 | ||
615 | /* Map channel shm into process memory */ | |
38fae1d3 | 616 | struct lttng_ust_shm_handle *ustctl_map_channel(struct lttng_ust_object_data *chan_data) |
57773204 | 617 | { |
38fae1d3 | 618 | struct lttng_ust_shm_handle *handle; |
57773204 MD |
619 | struct channel *chan; |
620 | size_t chan_size; | |
c1fca457 | 621 | struct lttng_ust_lib_ring_buffer_config *config; |
7a784989 | 622 | int ret; |
57773204 | 623 | |
9bfc503d MD |
624 | if (!chan_data) |
625 | return NULL; | |
626 | ||
57773204 MD |
627 | handle = channel_handle_create(chan_data->shm_fd, |
628 | chan_data->wait_fd, | |
629 | chan_data->memory_map_size); | |
630 | if (!handle) { | |
631 | ERR("create handle error"); | |
632 | return NULL; | |
633 | } | |
634 | /* | |
0bfe09ec MD |
635 | * Set to -1, and then close the shm fd, and set the handle shm |
636 | * fd to -1 too. We don't need the shm fds after they have been | |
637 | * mapped. | |
638 | * The wait_fd is set to -1 in chan_data because it is now owned | |
639 | * by the handle. | |
57773204 MD |
640 | */ |
641 | chan_data->shm_fd = -1; | |
642 | chan_data->wait_fd = -1; | |
643 | ||
0bfe09ec MD |
644 | /* chan is object 0. This is hardcoded. */ |
645 | if (handle->table->objects[0].shm_fd >= 0) { | |
646 | ret = close(handle->table->objects[0].shm_fd); | |
647 | if (ret) { | |
648 | perror("Error closing shm_fd"); | |
649 | } | |
650 | handle->table->objects[0].shm_fd = -1; | |
651 | } | |
652 | ||
57773204 MD |
653 | /* |
654 | * TODO: add consistency checks to be resilient if the | |
655 | * application try to feed us with incoherent channel structure | |
656 | * values. | |
657 | */ | |
658 | chan = shmp(handle, handle->chan); | |
659 | /* chan is object 0. This is hardcoded. */ | |
660 | chan_size = handle->table->objects[0].allocated_len; | |
661 | handle->shadow_chan = malloc(chan_size); | |
662 | if (!handle->shadow_chan) { | |
663 | channel_destroy(chan, handle, 1); | |
664 | return NULL; | |
665 | } | |
666 | memcpy(handle->shadow_chan, chan, chan_size); | |
bbc70d1b MD |
667 | /* |
668 | * The callback pointers in the producer are invalid in the | |
c1fca457 | 669 | * consumer. We need to look them up here. |
bbc70d1b | 670 | */ |
c1fca457 MD |
671 | config = &handle->shadow_chan->backend.config; |
672 | switch (config->client_type) { | |
673 | case LTTNG_CLIENT_METADATA: | |
674 | memcpy(&config->cb, lttng_client_callbacks_metadata, | |
675 | sizeof(config->cb)); | |
676 | break; | |
677 | case LTTNG_CLIENT_DISCARD: | |
678 | memcpy(&config->cb, lttng_client_callbacks_discard, | |
679 | sizeof(config->cb)); | |
680 | break; | |
681 | case LTTNG_CLIENT_OVERWRITE: | |
682 | memcpy(&config->cb, lttng_client_callbacks_overwrite, | |
683 | sizeof(config->cb)); | |
684 | break; | |
685 | default: | |
686 | ERR("Unknown client type %d", config->client_type); | |
687 | channel_destroy(chan, handle, 1); | |
688 | return NULL; | |
689 | } | |
7a784989 MD |
690 | /* Replace the object table pointer. */ |
691 | ret = munmap(handle->table->objects[0].memory_map, | |
692 | handle->table->objects[0].memory_map_size); | |
693 | if (ret) { | |
694 | perror("munmap"); | |
695 | assert(0); | |
696 | } | |
697 | handle->table->objects[0].memory_map = (char *) handle->shadow_chan; | |
698 | handle->table->objects[0].is_shadow = 1; | |
57773204 MD |
699 | return handle; |
700 | } | |
701 | ||
702 | /* Add stream to channel shm and map its shm into process memory */ | |
38fae1d3 | 703 | int ustctl_add_stream(struct lttng_ust_shm_handle *handle, |
61f02aea | 704 | struct lttng_ust_object_data *stream_data) |
57773204 MD |
705 | { |
706 | int ret; | |
707 | ||
9bfc503d MD |
708 | if (!handle || !stream_data) |
709 | return -EINVAL; | |
710 | ||
57773204 MD |
711 | if (!stream_data->handle) |
712 | return -ENOENT; | |
713 | /* map stream */ | |
714 | ret = channel_handle_add_stream(handle, | |
715 | stream_data->shm_fd, | |
716 | stream_data->wait_fd, | |
717 | stream_data->memory_map_size); | |
718 | if (ret) { | |
719 | ERR("add stream error\n"); | |
720 | return ret; | |
721 | } | |
722 | /* | |
38fae1d3 | 723 | * Set to -1 because the lttng_ust_shm_handle destruction will take care |
57773204 MD |
724 | * of closing shm_fd and wait_fd. |
725 | */ | |
726 | stream_data->shm_fd = -1; | |
727 | stream_data->wait_fd = -1; | |
728 | return 0; | |
729 | } | |
730 | ||
38fae1d3 | 731 | void ustctl_unmap_channel(struct lttng_ust_shm_handle *handle) |
5224b5c8 MD |
732 | { |
733 | struct channel *chan; | |
734 | ||
9bfc503d | 735 | assert(handle); |
5224b5c8 MD |
736 | chan = shmp(handle, handle->chan); |
737 | channel_destroy(chan, handle, 1); | |
738 | } | |
739 | ||
0bfe09ec MD |
740 | /* |
741 | * ustctl closes the shm_fd fds after mapping it. | |
742 | */ | |
4cfec15c | 743 | struct lttng_ust_lib_ring_buffer *ustctl_open_stream_read(struct lttng_ust_shm_handle *handle, |
6e922b24 MD |
744 | int cpu) |
745 | { | |
36860b65 | 746 | struct channel *chan; |
ef9ff354 | 747 | int *shm_fd, *wait_fd; |
bf5ff35e | 748 | char *shm_path, *wait_pipe_path; |
ef9ff354 | 749 | uint64_t *memory_map_size; |
4cfec15c | 750 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
751 | int ret; |
752 | ||
9bfc503d MD |
753 | if (!handle) |
754 | return NULL; | |
755 | ||
36860b65 | 756 | chan = handle->shadow_chan; |
6e922b24 | 757 | buf = channel_get_ring_buffer(&chan->backend.config, |
bf5ff35e CB |
758 | chan, cpu, handle, |
759 | &shm_fd, &shm_path, | |
760 | &wait_fd, &wait_pipe_path, | |
761 | &memory_map_size); | |
6e922b24 MD |
762 | if (!buf) |
763 | return NULL; | |
764 | ret = lib_ring_buffer_open_read(buf, handle, 1); | |
765 | if (ret) | |
766 | return NULL; | |
0bfe09ec MD |
767 | /* |
768 | * We can close shm_fd early, right after is has been mapped. | |
769 | */ | |
770 | if (*shm_fd >= 0) { | |
771 | ret = close(*shm_fd); | |
772 | if (ret) { | |
773 | perror("Error closing shm_fd"); | |
774 | } | |
775 | *shm_fd = -1; | |
776 | } | |
6e922b24 MD |
777 | return buf; |
778 | } | |
779 | ||
38fae1d3 | 780 | void ustctl_close_stream_read(struct lttng_ust_shm_handle *handle, |
4cfec15c | 781 | struct lttng_ust_lib_ring_buffer *buf) |
6e922b24 | 782 | { |
9bfc503d | 783 | assert(handle && buf); |
6e922b24 MD |
784 | lib_ring_buffer_release_read(buf, handle, 1); |
785 | } | |
786 | ||
57773204 MD |
787 | /* For mmap mode, readable without "get" operation */ |
788 | ||
38fae1d3 | 789 | void *ustctl_get_mmap_base(struct lttng_ust_shm_handle *handle, |
4cfec15c | 790 | struct lttng_ust_lib_ring_buffer *buf) |
9095efe9 | 791 | { |
9bfc503d MD |
792 | if (!handle || !buf) |
793 | return NULL; | |
9095efe9 MD |
794 | return shmp(handle, buf->backend.memory_map); |
795 | } | |
796 | ||
57773204 | 797 | /* returns the length to mmap. */ |
38fae1d3 | 798 | int ustctl_get_mmap_len(struct lttng_ust_shm_handle *handle, |
4cfec15c | 799 | struct lttng_ust_lib_ring_buffer *buf, |
57773204 MD |
800 | unsigned long *len) |
801 | { | |
802 | unsigned long mmap_buf_len; | |
36860b65 | 803 | struct channel *chan; |
57773204 | 804 | |
9bfc503d MD |
805 | if (!handle || !buf || !len) |
806 | return -EINVAL; | |
807 | ||
36860b65 | 808 | chan = handle->shadow_chan; |
57773204 MD |
809 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
810 | return -EINVAL; | |
811 | mmap_buf_len = chan->backend.buf_size; | |
812 | if (chan->backend.extra_reader_sb) | |
813 | mmap_buf_len += chan->backend.subbuf_size; | |
814 | if (mmap_buf_len > INT_MAX) | |
815 | return -EFBIG; | |
816 | *len = mmap_buf_len; | |
817 | return 0; | |
818 | } | |
819 | ||
820 | /* returns the maximum size for sub-buffers. */ | |
38fae1d3 | 821 | int ustctl_get_max_subbuf_size(struct lttng_ust_shm_handle *handle, |
4cfec15c | 822 | struct lttng_ust_lib_ring_buffer *buf, |
57773204 MD |
823 | unsigned long *len) |
824 | { | |
36860b65 | 825 | struct channel *chan; |
57773204 | 826 | |
9bfc503d MD |
827 | if (!handle || !buf || !len) |
828 | return -EINVAL; | |
829 | ||
36860b65 | 830 | chan = handle->shadow_chan; |
57773204 MD |
831 | *len = chan->backend.subbuf_size; |
832 | return 0; | |
833 | } | |
834 | ||
835 | /* | |
836 | * For mmap mode, operate on the current packet (between get/put or | |
837 | * get_next/put_next). | |
838 | */ | |
839 | ||
840 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
38fae1d3 | 841 | int ustctl_get_mmap_read_offset(struct lttng_ust_shm_handle *handle, |
4cfec15c | 842 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *off) |
57773204 | 843 | { |
36860b65 | 844 | struct channel *chan; |
57773204 MD |
845 | unsigned long sb_bindex; |
846 | ||
9bfc503d MD |
847 | if (!handle || !buf || !off) |
848 | return -EINVAL; | |
849 | ||
36860b65 | 850 | chan = handle->shadow_chan; |
57773204 MD |
851 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
852 | return -EINVAL; | |
853 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
854 | buf->backend.buf_rsb.id); | |
855 | *off = shmp(handle, shmp_index(handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset; | |
856 | return 0; | |
857 | } | |
858 | ||
859 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
38fae1d3 | 860 | int ustctl_get_subbuf_size(struct lttng_ust_shm_handle *handle, |
4cfec15c | 861 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *len) |
57773204 | 862 | { |
36860b65 | 863 | struct channel *chan; |
57773204 | 864 | |
9bfc503d MD |
865 | if (!handle || !buf || !len) |
866 | return -EINVAL; | |
867 | ||
36860b65 | 868 | chan = handle->shadow_chan; |
57773204 MD |
869 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
870 | handle); | |
871 | return 0; | |
872 | } | |
873 | ||
874 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
38fae1d3 | 875 | int ustctl_get_padded_subbuf_size(struct lttng_ust_shm_handle *handle, |
4cfec15c | 876 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *len) |
57773204 | 877 | { |
36860b65 | 878 | struct channel *chan; |
57773204 | 879 | |
9bfc503d MD |
880 | if (!handle || !buf || !len) |
881 | return -EINVAL; | |
882 | ||
36860b65 | 883 | chan = handle->shadow_chan; |
57773204 MD |
884 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
885 | handle); | |
886 | *len = PAGE_ALIGN(*len); | |
887 | return 0; | |
888 | } | |
889 | ||
890 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
38fae1d3 | 891 | int ustctl_get_next_subbuf(struct lttng_ust_shm_handle *handle, |
4cfec15c | 892 | struct lttng_ust_lib_ring_buffer *buf) |
57773204 | 893 | { |
9bfc503d MD |
894 | if (!handle || !buf) |
895 | return -EINVAL; | |
896 | ||
57773204 MD |
897 | return lib_ring_buffer_get_next_subbuf(buf, handle); |
898 | } | |
899 | ||
900 | ||
901 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
38fae1d3 | 902 | int ustctl_put_next_subbuf(struct lttng_ust_shm_handle *handle, |
4cfec15c | 903 | struct lttng_ust_lib_ring_buffer *buf) |
57773204 | 904 | { |
9bfc503d MD |
905 | if (!handle || !buf) |
906 | return -EINVAL; | |
907 | ||
57773204 MD |
908 | lib_ring_buffer_put_next_subbuf(buf, handle); |
909 | return 0; | |
910 | } | |
911 | ||
912 | /* snapshot */ | |
913 | ||
914 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
38fae1d3 | 915 | int ustctl_snapshot(struct lttng_ust_shm_handle *handle, |
4cfec15c | 916 | struct lttng_ust_lib_ring_buffer *buf) |
57773204 | 917 | { |
9bfc503d MD |
918 | if (!handle || !buf) |
919 | return -EINVAL; | |
920 | ||
57773204 MD |
921 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
922 | &buf->prod_snapshot, handle); | |
923 | } | |
924 | ||
925 | /* Get the consumer position (iteration start) */ | |
38fae1d3 | 926 | int ustctl_snapshot_get_consumed(struct lttng_ust_shm_handle *handle, |
4cfec15c | 927 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos) |
57773204 | 928 | { |
9bfc503d MD |
929 | if (!handle || !buf || !pos) |
930 | return -EINVAL; | |
931 | ||
57773204 MD |
932 | *pos = buf->cons_snapshot; |
933 | return 0; | |
934 | } | |
935 | ||
936 | /* Get the producer position (iteration end) */ | |
38fae1d3 | 937 | int ustctl_snapshot_get_produced(struct lttng_ust_shm_handle *handle, |
4cfec15c | 938 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos) |
57773204 | 939 | { |
9bfc503d MD |
940 | if (!handle || !buf || !pos) |
941 | return -EINVAL; | |
942 | ||
57773204 MD |
943 | *pos = buf->prod_snapshot; |
944 | return 0; | |
945 | } | |
946 | ||
947 | /* Get exclusive read access to the specified sub-buffer position */ | |
38fae1d3 | 948 | int ustctl_get_subbuf(struct lttng_ust_shm_handle *handle, |
4cfec15c | 949 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos) |
57773204 | 950 | { |
9bfc503d MD |
951 | if (!handle || !buf || !pos) |
952 | return -EINVAL; | |
953 | ||
57773204 MD |
954 | return lib_ring_buffer_get_subbuf(buf, *pos, handle); |
955 | } | |
956 | ||
957 | /* Release exclusive sub-buffer access */ | |
38fae1d3 | 958 | int ustctl_put_subbuf(struct lttng_ust_shm_handle *handle, |
4cfec15c | 959 | struct lttng_ust_lib_ring_buffer *buf) |
57773204 | 960 | { |
9bfc503d MD |
961 | if (!handle || !buf) |
962 | return -EINVAL; | |
963 | ||
57773204 MD |
964 | lib_ring_buffer_put_subbuf(buf, handle); |
965 | return 0; | |
966 | } | |
967 | ||
02a15cfb | 968 | void ustctl_flush_buffer(struct lttng_ust_shm_handle *handle, |
b52190f2 MD |
969 | struct lttng_ust_lib_ring_buffer *buf, |
970 | int producer_active) | |
57773204 | 971 | { |
9bfc503d | 972 | assert(handle && buf); |
b52190f2 MD |
973 | lib_ring_buffer_switch_slow(buf, |
974 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
975 | handle); | |
57773204 | 976 | } |