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 | ||
57773204 | 34 | static |
61f02aea | 35 | void init_object(struct lttng_ust_object_data *data) |
57773204 MD |
36 | { |
37 | data->handle = -1; | |
38 | data->shm_fd = -1; | |
39 | data->wait_fd = -1; | |
40 | data->memory_map_size = 0; | |
41 | } | |
42 | ||
2be0e72c MD |
43 | int ustctl_release_handle(int sock, int handle) |
44 | { | |
45 | struct ustcomm_ust_msg lum; | |
46 | struct ustcomm_ust_reply lur; | |
47 | int ret; | |
48 | ||
49 | if (sock >= 0) { | |
50 | memset(&lum, 0, sizeof(lum)); | |
51 | lum.handle = handle; | |
52 | lum.cmd = LTTNG_UST_RELEASE; | |
53 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
7bc53e94 | 54 | if (ret) |
2be0e72c | 55 | return ret; |
2be0e72c MD |
56 | } |
57 | return 0; | |
58 | } | |
12388166 MD |
59 | /* |
60 | * If sock is negative, it means we don't have to notify the other side | |
61 | * (e.g. application has already vanished). | |
62 | */ | |
d26228ae | 63 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 64 | { |
57773204 MD |
65 | int ret; |
66 | ||
9bfc503d MD |
67 | if (!data) |
68 | return -EINVAL; | |
69 | ||
d26228ae MD |
70 | if (data->shm_fd >= 0) { |
71 | ret = close(data->shm_fd); | |
72 | if (ret < 0) { | |
7bc53e94 | 73 | ret = -errno; |
d26228ae MD |
74 | return ret; |
75 | } | |
76 | } | |
77 | if (data->wait_fd >= 0) { | |
78 | ret = close(data->wait_fd); | |
79 | if (ret < 0) { | |
7bc53e94 | 80 | ret = -errno; |
d26228ae MD |
81 | return ret; |
82 | } | |
83 | } | |
2be0e72c | 84 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
85 | } |
86 | ||
1c5e467e MD |
87 | /* |
88 | * Send registration done packet to the application. | |
89 | */ | |
90 | int ustctl_register_done(int sock) | |
91 | { | |
92 | struct ustcomm_ust_msg lum; | |
93 | struct ustcomm_ust_reply lur; | |
94 | int ret; | |
95 | ||
96 | DBG("Sending register done command to %d", sock); | |
97 | memset(&lum, 0, sizeof(lum)); | |
98 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
99 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
100 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
101 | if (ret) | |
102 | return ret; | |
1c5e467e | 103 | return 0; |
1c5e467e MD |
104 | } |
105 | ||
57773204 MD |
106 | /* |
107 | * returns session handle. | |
108 | */ | |
109 | int ustctl_create_session(int sock) | |
110 | { | |
111 | struct ustcomm_ust_msg lum; | |
112 | struct ustcomm_ust_reply lur; | |
113 | int ret, session_handle; | |
114 | ||
115 | /* Create session */ | |
116 | memset(&lum, 0, sizeof(lum)); | |
117 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
118 | lum.cmd = LTTNG_UST_SESSION; | |
119 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
120 | if (ret) | |
121 | return ret; | |
122 | session_handle = lur.ret_val; | |
123 | DBG("received session handle %u", session_handle); | |
124 | return session_handle; | |
125 | } | |
126 | ||
127 | /* open the metadata global channel */ | |
128 | int ustctl_open_metadata(int sock, int session_handle, | |
129 | struct lttng_ust_channel_attr *chops, | |
61f02aea | 130 | struct lttng_ust_object_data **_metadata_data) |
57773204 MD |
131 | { |
132 | struct ustcomm_ust_msg lum; | |
133 | struct ustcomm_ust_reply lur; | |
61f02aea | 134 | struct lttng_ust_object_data *metadata_data; |
eeee05f3 | 135 | int ret, err = 0; |
57773204 | 136 | |
9bfc503d MD |
137 | if (!chops || !_metadata_data) |
138 | return -EINVAL; | |
139 | ||
57773204 MD |
140 | metadata_data = malloc(sizeof(*metadata_data)); |
141 | if (!metadata_data) | |
142 | return -ENOMEM; | |
143 | init_object(metadata_data); | |
144 | /* Create metadata channel */ | |
145 | memset(&lum, 0, sizeof(lum)); | |
146 | lum.handle = session_handle; | |
147 | lum.cmd = LTTNG_UST_METADATA; | |
148 | lum.u.channel.overwrite = chops->overwrite; | |
149 | lum.u.channel.subbuf_size = chops->subbuf_size; | |
150 | lum.u.channel.num_subbuf = chops->num_subbuf; | |
151 | lum.u.channel.switch_timer_interval = chops->switch_timer_interval; | |
152 | lum.u.channel.read_timer_interval = chops->read_timer_interval; | |
153 | lum.u.channel.output = chops->output; | |
154 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
155 | if (ret) { | |
156 | free(metadata_data); | |
157 | return ret; | |
158 | } | |
57773204 MD |
159 | metadata_data->handle = lur.ret_val; |
160 | DBG("received metadata handle %u", metadata_data->handle); | |
161 | metadata_data->memory_map_size = lur.u.channel.memory_map_size; | |
162 | /* get shm fd */ | |
163 | ret = ustcomm_recv_fd(sock); | |
164 | if (ret < 0) | |
7bc53e94 | 165 | err = ret; |
eeee05f3 MD |
166 | else |
167 | metadata_data->shm_fd = ret; | |
168 | /* | |
169 | * We need to get the second FD even if the first fails, because | |
170 | * libust expects us to read the two FDs. | |
171 | */ | |
57773204 MD |
172 | /* get wait fd */ |
173 | ret = ustcomm_recv_fd(sock); | |
174 | if (ret < 0) | |
7bc53e94 | 175 | err = ret; |
eeee05f3 MD |
176 | else |
177 | metadata_data->wait_fd = ret; | |
178 | if (err) | |
57773204 | 179 | goto error; |
57773204 MD |
180 | *_metadata_data = metadata_data; |
181 | return 0; | |
182 | ||
183 | error: | |
d26228ae | 184 | (void) ustctl_release_object(sock, metadata_data); |
38970582 | 185 | free(metadata_data); |
7bc53e94 | 186 | return err; |
57773204 MD |
187 | } |
188 | ||
189 | int ustctl_create_channel(int sock, int session_handle, | |
190 | struct lttng_ust_channel_attr *chops, | |
61f02aea | 191 | struct lttng_ust_object_data **_channel_data) |
57773204 MD |
192 | { |
193 | struct ustcomm_ust_msg lum; | |
194 | struct ustcomm_ust_reply lur; | |
61f02aea | 195 | struct lttng_ust_object_data *channel_data; |
eeee05f3 | 196 | int ret, err = 0; |
57773204 | 197 | |
9bfc503d MD |
198 | if (!chops || !_channel_data) |
199 | return -EINVAL; | |
200 | ||
57773204 MD |
201 | channel_data = malloc(sizeof(*channel_data)); |
202 | if (!channel_data) | |
203 | return -ENOMEM; | |
204 | init_object(channel_data); | |
205 | /* Create metadata channel */ | |
206 | memset(&lum, 0, sizeof(lum)); | |
207 | lum.handle = session_handle; | |
208 | lum.cmd = LTTNG_UST_CHANNEL; | |
209 | lum.u.channel.overwrite = chops->overwrite; | |
210 | lum.u.channel.subbuf_size = chops->subbuf_size; | |
211 | lum.u.channel.num_subbuf = chops->num_subbuf; | |
212 | lum.u.channel.switch_timer_interval = chops->switch_timer_interval; | |
213 | lum.u.channel.read_timer_interval = chops->read_timer_interval; | |
214 | lum.u.channel.output = chops->output; | |
215 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
216 | if (ret) { | |
217 | free(channel_data); | |
218 | return ret; | |
219 | } | |
57773204 MD |
220 | channel_data->handle = lur.ret_val; |
221 | DBG("received channel handle %u", channel_data->handle); | |
222 | channel_data->memory_map_size = lur.u.channel.memory_map_size; | |
223 | /* get shm fd */ | |
224 | ret = ustcomm_recv_fd(sock); | |
225 | if (ret < 0) | |
7bc53e94 | 226 | err = ret; |
eeee05f3 MD |
227 | else |
228 | channel_data->shm_fd = ret; | |
229 | /* | |
230 | * We need to get the second FD even if the first fails, because | |
231 | * libust expects us to read the two FDs. | |
232 | */ | |
57773204 MD |
233 | /* get wait fd */ |
234 | ret = ustcomm_recv_fd(sock); | |
235 | if (ret < 0) | |
7bc53e94 | 236 | err = ret; |
eeee05f3 MD |
237 | else |
238 | channel_data->wait_fd = ret; | |
239 | if (err) | |
57773204 | 240 | goto error; |
57773204 MD |
241 | *_channel_data = channel_data; |
242 | return 0; | |
243 | ||
244 | error: | |
d26228ae | 245 | (void) ustctl_release_object(sock, channel_data); |
38970582 | 246 | free(channel_data); |
7bc53e94 | 247 | return err; |
57773204 MD |
248 | } |
249 | ||
250 | /* | |
251 | * Return -ENOENT if no more stream is available for creation. | |
252 | * Return 0 on success. | |
7bc53e94 MD |
253 | * Return negative error value on system error. |
254 | * Return positive error value on UST error. | |
57773204 | 255 | */ |
61f02aea MD |
256 | int ustctl_create_stream(int sock, struct lttng_ust_object_data *channel_data, |
257 | struct lttng_ust_object_data **_stream_data) | |
57773204 MD |
258 | { |
259 | struct ustcomm_ust_msg lum; | |
260 | struct ustcomm_ust_reply lur; | |
61f02aea | 261 | struct lttng_ust_object_data *stream_data; |
eeee05f3 | 262 | int ret, fd, err = 0; |
57773204 | 263 | |
9bfc503d MD |
264 | if (!channel_data || !_stream_data) |
265 | return -EINVAL; | |
266 | ||
57773204 MD |
267 | stream_data = malloc(sizeof(*stream_data)); |
268 | if (!stream_data) | |
269 | return -ENOMEM; | |
270 | init_object(stream_data); | |
271 | memset(&lum, 0, sizeof(lum)); | |
272 | lum.handle = channel_data->handle; | |
273 | lum.cmd = LTTNG_UST_STREAM; | |
274 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
275 | if (ret) { | |
276 | free(stream_data); | |
277 | return ret; | |
278 | } | |
57773204 MD |
279 | stream_data->handle = lur.ret_val; |
280 | DBG("received stream handle %u", stream_data->handle); | |
281 | stream_data->memory_map_size = lur.u.stream.memory_map_size; | |
282 | /* get shm fd */ | |
283 | fd = ustcomm_recv_fd(sock); | |
284 | if (fd < 0) | |
7bc53e94 | 285 | err = fd; |
eeee05f3 MD |
286 | else |
287 | stream_data->shm_fd = fd; | |
288 | /* | |
289 | * We need to get the second FD even if the first fails, because | |
290 | * libust expects us to read the two FDs. | |
291 | */ | |
57773204 MD |
292 | /* get wait fd */ |
293 | fd = ustcomm_recv_fd(sock); | |
294 | if (fd < 0) | |
7bc53e94 | 295 | err = fd; |
eeee05f3 MD |
296 | else |
297 | stream_data->wait_fd = fd; | |
298 | if (err) | |
57773204 | 299 | goto error; |
57773204 MD |
300 | *_stream_data = stream_data; |
301 | return ret; | |
302 | ||
303 | error: | |
d26228ae | 304 | (void) ustctl_release_object(sock, stream_data); |
38970582 | 305 | free(stream_data); |
7bc53e94 | 306 | return err; |
57773204 MD |
307 | } |
308 | ||
309 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, | |
61f02aea MD |
310 | struct lttng_ust_object_data *channel_data, |
311 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
312 | { |
313 | struct ustcomm_ust_msg lum; | |
314 | struct ustcomm_ust_reply lur; | |
61f02aea | 315 | struct lttng_ust_object_data *event_data; |
57773204 MD |
316 | int ret; |
317 | ||
9bfc503d MD |
318 | if (!channel_data || !_event_data) |
319 | return -EINVAL; | |
320 | ||
57773204 MD |
321 | event_data = malloc(sizeof(*event_data)); |
322 | if (!event_data) | |
323 | return -ENOMEM; | |
324 | init_object(event_data); | |
325 | memset(&lum, 0, sizeof(lum)); | |
326 | lum.handle = channel_data->handle; | |
327 | lum.cmd = LTTNG_UST_EVENT; | |
328 | strncpy(lum.u.event.name, ev->name, | |
329 | LTTNG_UST_SYM_NAME_LEN); | |
330 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
331 | lum.u.event.loglevel_type = ev->loglevel_type; |
332 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
333 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
334 | if (ret) { | |
335 | free(event_data); | |
336 | return ret; | |
337 | } | |
338 | event_data->handle = lur.ret_val; | |
339 | DBG("received event handle %u", event_data->handle); | |
340 | *_event_data = event_data; | |
341 | return 0; | |
342 | } | |
343 | ||
344 | int ustctl_add_context(int sock, struct lttng_ust_context *ctx, | |
61f02aea MD |
345 | struct lttng_ust_object_data *obj_data, |
346 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
347 | { |
348 | struct ustcomm_ust_msg lum; | |
349 | struct ustcomm_ust_reply lur; | |
61f02aea | 350 | struct lttng_ust_object_data *context_data; |
57773204 MD |
351 | int ret; |
352 | ||
9bfc503d MD |
353 | if (!obj_data || !_context_data) |
354 | return -EINVAL; | |
355 | ||
57773204 MD |
356 | context_data = malloc(sizeof(*context_data)); |
357 | if (!context_data) | |
358 | return -ENOMEM; | |
359 | init_object(context_data); | |
360 | memset(&lum, 0, sizeof(lum)); | |
3039d8ed | 361 | lum.handle = obj_data->handle; |
57773204 MD |
362 | lum.cmd = LTTNG_UST_CONTEXT; |
363 | lum.u.context.ctx = ctx->ctx; | |
364 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
365 | if (ret) { | |
366 | free(context_data); | |
367 | return ret; | |
368 | } | |
369 | context_data->handle = lur.ret_val; | |
370 | DBG("received context handle %u", context_data->handle); | |
371 | *_context_data = context_data; | |
372 | return ret; | |
373 | } | |
374 | ||
cd54f6d9 MD |
375 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
376 | struct lttng_ust_object_data *obj_data) | |
377 | { | |
378 | struct ustcomm_ust_msg lum; | |
379 | struct ustcomm_ust_reply lur; | |
380 | int ret; | |
381 | ||
382 | if (!obj_data) | |
383 | return -EINVAL; | |
384 | ||
385 | memset(&lum, 0, sizeof(lum)); | |
386 | lum.handle = obj_data->handle; | |
387 | lum.cmd = LTTNG_UST_FILTER; | |
388 | lum.u.filter.data_size = bytecode->len; | |
389 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 390 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
391 | |
392 | ret = ustcomm_send_app_msg(sock, &lum); | |
393 | if (ret) | |
394 | return ret; | |
cd54f6d9 MD |
395 | /* send var len bytecode */ |
396 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
397 | bytecode->len); | |
398 | if (ret < 0) { | |
7bc53e94 MD |
399 | if (ret == -ECONNRESET) |
400 | fprintf(stderr, "remote end closed connection\n"); | |
cd54f6d9 MD |
401 | return ret; |
402 | } | |
7bc53e94 MD |
403 | if (ret != bytecode->len) |
404 | return -EINVAL; | |
405 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
406 | } |
407 | ||
57773204 | 408 | /* Enable event, channel and session ioctl */ |
61f02aea | 409 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
410 | { |
411 | struct ustcomm_ust_msg lum; | |
412 | struct ustcomm_ust_reply lur; | |
413 | int ret; | |
414 | ||
9bfc503d MD |
415 | if (!object) |
416 | return -EINVAL; | |
417 | ||
57773204 MD |
418 | memset(&lum, 0, sizeof(lum)); |
419 | lum.handle = object->handle; | |
420 | lum.cmd = LTTNG_UST_ENABLE; | |
421 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
422 | if (ret) | |
423 | return ret; | |
424 | DBG("enabled handle %u", object->handle); | |
425 | return 0; | |
426 | } | |
427 | ||
428 | /* Disable event, channel and session ioctl */ | |
61f02aea | 429 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
430 | { |
431 | struct ustcomm_ust_msg lum; | |
432 | struct ustcomm_ust_reply lur; | |
433 | int ret; | |
434 | ||
9bfc503d MD |
435 | if (!object) |
436 | return -EINVAL; | |
437 | ||
57773204 MD |
438 | memset(&lum, 0, sizeof(lum)); |
439 | lum.handle = object->handle; | |
440 | lum.cmd = LTTNG_UST_DISABLE; | |
441 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
442 | if (ret) | |
443 | return ret; | |
444 | DBG("disable handle %u", object->handle); | |
445 | return 0; | |
446 | } | |
447 | ||
4a6ca058 | 448 | int ustctl_start_session(int sock, int handle) |
57773204 | 449 | { |
61f02aea | 450 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
451 | |
452 | obj.handle = handle; | |
453 | return ustctl_enable(sock, &obj); | |
57773204 MD |
454 | } |
455 | ||
4a6ca058 | 456 | int ustctl_stop_session(int sock, int handle) |
57773204 | 457 | { |
61f02aea | 458 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
459 | |
460 | obj.handle = handle; | |
461 | return ustctl_disable(sock, &obj); | |
57773204 MD |
462 | } |
463 | ||
57773204 MD |
464 | int ustctl_tracepoint_list(int sock) |
465 | { | |
b115631f MD |
466 | struct ustcomm_ust_msg lum; |
467 | struct ustcomm_ust_reply lur; | |
468 | int ret, tp_list_handle; | |
469 | ||
470 | memset(&lum, 0, sizeof(lum)); | |
471 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
472 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
473 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
474 | if (ret) | |
475 | return ret; | |
476 | tp_list_handle = lur.ret_val; | |
477 | DBG("received tracepoint list handle %u", tp_list_handle); | |
478 | return tp_list_handle; | |
479 | } | |
480 | ||
481 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 482 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
483 | { |
484 | struct ustcomm_ust_msg lum; | |
485 | struct ustcomm_ust_reply lur; | |
486 | int ret; | |
487 | ||
9bfc503d MD |
488 | if (!iter) |
489 | return -EINVAL; | |
490 | ||
b115631f MD |
491 | memset(&lum, 0, sizeof(lum)); |
492 | lum.handle = tp_list_handle; | |
493 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
494 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
495 | if (ret) | |
496 | return ret; | |
882a56d7 | 497 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 498 | lur.u.tracepoint.name, |
882a56d7 | 499 | lur.u.tracepoint.loglevel); |
cbef6901 | 500 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 501 | return 0; |
57773204 MD |
502 | } |
503 | ||
40003310 MD |
504 | int ustctl_tracepoint_field_list(int sock) |
505 | { | |
506 | struct ustcomm_ust_msg lum; | |
507 | struct ustcomm_ust_reply lur; | |
508 | int ret, tp_field_list_handle; | |
509 | ||
510 | memset(&lum, 0, sizeof(lum)); | |
511 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
512 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
513 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
514 | if (ret) | |
515 | return ret; | |
516 | tp_field_list_handle = lur.ret_val; | |
517 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
518 | return tp_field_list_handle; | |
519 | } | |
520 | ||
521 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
522 | struct lttng_ust_field_iter *iter) | |
523 | { | |
524 | struct ustcomm_ust_msg lum; | |
525 | struct ustcomm_ust_reply lur; | |
526 | int ret; | |
527 | ssize_t len; | |
528 | ||
529 | if (!iter) | |
530 | return -EINVAL; | |
531 | ||
532 | memset(&lum, 0, sizeof(lum)); | |
533 | lum.handle = tp_field_list_handle; | |
534 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
535 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
536 | if (ret) | |
537 | return ret; | |
538 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
539 | if (len != sizeof(*iter)) { | |
540 | return -EINVAL; | |
541 | } | |
542 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
543 | iter->event_name, | |
544 | iter->loglevel, | |
545 | iter->field_name, | |
546 | iter->type); | |
547 | return 0; | |
548 | } | |
549 | ||
57773204 MD |
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); | |
9b733198 | 688 | free(handle->shadow_chan); |
c1fca457 MD |
689 | return NULL; |
690 | } | |
7a784989 MD |
691 | /* Replace the object table pointer. */ |
692 | ret = munmap(handle->table->objects[0].memory_map, | |
693 | handle->table->objects[0].memory_map_size); | |
694 | if (ret) { | |
695 | perror("munmap"); | |
696 | assert(0); | |
697 | } | |
698 | handle->table->objects[0].memory_map = (char *) handle->shadow_chan; | |
699 | handle->table->objects[0].is_shadow = 1; | |
57773204 MD |
700 | return handle; |
701 | } | |
702 | ||
703 | /* Add stream to channel shm and map its shm into process memory */ | |
38fae1d3 | 704 | int ustctl_add_stream(struct lttng_ust_shm_handle *handle, |
61f02aea | 705 | struct lttng_ust_object_data *stream_data) |
57773204 MD |
706 | { |
707 | int ret; | |
708 | ||
9bfc503d MD |
709 | if (!handle || !stream_data) |
710 | return -EINVAL; | |
711 | ||
57773204 MD |
712 | if (!stream_data->handle) |
713 | return -ENOENT; | |
714 | /* map stream */ | |
715 | ret = channel_handle_add_stream(handle, | |
716 | stream_data->shm_fd, | |
717 | stream_data->wait_fd, | |
718 | stream_data->memory_map_size); | |
719 | if (ret) { | |
720 | ERR("add stream error\n"); | |
721 | return ret; | |
722 | } | |
723 | /* | |
38fae1d3 | 724 | * Set to -1 because the lttng_ust_shm_handle destruction will take care |
57773204 MD |
725 | * of closing shm_fd and wait_fd. |
726 | */ | |
727 | stream_data->shm_fd = -1; | |
728 | stream_data->wait_fd = -1; | |
729 | return 0; | |
730 | } | |
731 | ||
38fae1d3 | 732 | void ustctl_unmap_channel(struct lttng_ust_shm_handle *handle) |
5224b5c8 MD |
733 | { |
734 | struct channel *chan; | |
735 | ||
9bfc503d | 736 | assert(handle); |
5224b5c8 MD |
737 | chan = shmp(handle, handle->chan); |
738 | channel_destroy(chan, handle, 1); | |
9b733198 | 739 | free(handle->shadow_chan); |
5224b5c8 MD |
740 | } |
741 | ||
0bfe09ec MD |
742 | /* |
743 | * ustctl closes the shm_fd fds after mapping it. | |
744 | */ | |
4cfec15c | 745 | struct lttng_ust_lib_ring_buffer *ustctl_open_stream_read(struct lttng_ust_shm_handle *handle, |
6e922b24 MD |
746 | int cpu) |
747 | { | |
66bdd22a | 748 | struct channel *chan; |
ef9ff354 MD |
749 | int *shm_fd, *wait_fd; |
750 | uint64_t *memory_map_size; | |
4cfec15c | 751 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
752 | int ret; |
753 | ||
9bfc503d MD |
754 | if (!handle) |
755 | return NULL; | |
756 | ||
66bdd22a | 757 | chan = handle->shadow_chan; |
6e922b24 MD |
758 | buf = channel_get_ring_buffer(&chan->backend.config, |
759 | chan, cpu, handle, &shm_fd, &wait_fd, &memory_map_size); | |
760 | if (!buf) | |
761 | return NULL; | |
762 | ret = lib_ring_buffer_open_read(buf, handle, 1); | |
763 | if (ret) | |
764 | return NULL; | |
0bfe09ec MD |
765 | /* |
766 | * We can close shm_fd early, right after is has been mapped. | |
767 | */ | |
768 | if (*shm_fd >= 0) { | |
769 | ret = close(*shm_fd); | |
770 | if (ret) { | |
771 | perror("Error closing shm_fd"); | |
772 | } | |
773 | *shm_fd = -1; | |
774 | } | |
6e922b24 MD |
775 | return buf; |
776 | } | |
777 | ||
38fae1d3 | 778 | void ustctl_close_stream_read(struct lttng_ust_shm_handle *handle, |
4cfec15c | 779 | struct lttng_ust_lib_ring_buffer *buf) |
6e922b24 | 780 | { |
9bfc503d | 781 | assert(handle && buf); |
6e922b24 MD |
782 | lib_ring_buffer_release_read(buf, handle, 1); |
783 | } | |
784 | ||
57773204 MD |
785 | /* For mmap mode, readable without "get" operation */ |
786 | ||
38fae1d3 | 787 | void *ustctl_get_mmap_base(struct lttng_ust_shm_handle *handle, |
4cfec15c | 788 | struct lttng_ust_lib_ring_buffer *buf) |
9095efe9 | 789 | { |
9bfc503d MD |
790 | if (!handle || !buf) |
791 | return NULL; | |
9095efe9 MD |
792 | return shmp(handle, buf->backend.memory_map); |
793 | } | |
794 | ||
57773204 | 795 | /* returns the length to mmap. */ |
38fae1d3 | 796 | int ustctl_get_mmap_len(struct lttng_ust_shm_handle *handle, |
4cfec15c | 797 | struct lttng_ust_lib_ring_buffer *buf, |
57773204 MD |
798 | unsigned long *len) |
799 | { | |
800 | unsigned long mmap_buf_len; | |
66bdd22a | 801 | struct channel *chan; |
57773204 | 802 | |
9bfc503d MD |
803 | if (!handle || !buf || !len) |
804 | return -EINVAL; | |
805 | ||
66bdd22a | 806 | chan = handle->shadow_chan; |
57773204 MD |
807 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
808 | return -EINVAL; | |
809 | mmap_buf_len = chan->backend.buf_size; | |
810 | if (chan->backend.extra_reader_sb) | |
811 | mmap_buf_len += chan->backend.subbuf_size; | |
812 | if (mmap_buf_len > INT_MAX) | |
813 | return -EFBIG; | |
814 | *len = mmap_buf_len; | |
815 | return 0; | |
816 | } | |
817 | ||
818 | /* returns the maximum size for sub-buffers. */ | |
38fae1d3 | 819 | int ustctl_get_max_subbuf_size(struct lttng_ust_shm_handle *handle, |
4cfec15c | 820 | struct lttng_ust_lib_ring_buffer *buf, |
57773204 MD |
821 | unsigned long *len) |
822 | { | |
66bdd22a | 823 | struct channel *chan; |
57773204 | 824 | |
9bfc503d MD |
825 | if (!handle || !buf || !len) |
826 | return -EINVAL; | |
827 | ||
66bdd22a | 828 | chan = handle->shadow_chan; |
57773204 MD |
829 | *len = chan->backend.subbuf_size; |
830 | return 0; | |
831 | } | |
832 | ||
833 | /* | |
834 | * For mmap mode, operate on the current packet (between get/put or | |
835 | * get_next/put_next). | |
836 | */ | |
837 | ||
838 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
38fae1d3 | 839 | int ustctl_get_mmap_read_offset(struct lttng_ust_shm_handle *handle, |
4cfec15c | 840 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *off) |
57773204 | 841 | { |
66bdd22a | 842 | struct channel *chan; |
57773204 MD |
843 | unsigned long sb_bindex; |
844 | ||
9bfc503d MD |
845 | if (!handle || !buf || !off) |
846 | return -EINVAL; | |
847 | ||
66bdd22a | 848 | chan = handle->shadow_chan; |
57773204 MD |
849 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
850 | return -EINVAL; | |
851 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
852 | buf->backend.buf_rsb.id); | |
853 | *off = shmp(handle, shmp_index(handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset; | |
854 | return 0; | |
855 | } | |
856 | ||
857 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
38fae1d3 | 858 | int ustctl_get_subbuf_size(struct lttng_ust_shm_handle *handle, |
4cfec15c | 859 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *len) |
57773204 | 860 | { |
66bdd22a | 861 | struct channel *chan; |
57773204 | 862 | |
9bfc503d MD |
863 | if (!handle || !buf || !len) |
864 | return -EINVAL; | |
865 | ||
66bdd22a | 866 | chan = handle->shadow_chan; |
57773204 MD |
867 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
868 | handle); | |
869 | return 0; | |
870 | } | |
871 | ||
872 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
38fae1d3 | 873 | int ustctl_get_padded_subbuf_size(struct lttng_ust_shm_handle *handle, |
4cfec15c | 874 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *len) |
57773204 | 875 | { |
66bdd22a | 876 | struct channel *chan; |
57773204 | 877 | |
9bfc503d MD |
878 | if (!handle || !buf || !len) |
879 | return -EINVAL; | |
880 | ||
66bdd22a | 881 | chan = handle->shadow_chan; |
57773204 MD |
882 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
883 | handle); | |
884 | *len = PAGE_ALIGN(*len); | |
885 | return 0; | |
886 | } | |
887 | ||
888 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
38fae1d3 | 889 | int ustctl_get_next_subbuf(struct lttng_ust_shm_handle *handle, |
4cfec15c | 890 | struct lttng_ust_lib_ring_buffer *buf) |
57773204 | 891 | { |
9bfc503d MD |
892 | if (!handle || !buf) |
893 | return -EINVAL; | |
894 | ||
57773204 MD |
895 | return lib_ring_buffer_get_next_subbuf(buf, handle); |
896 | } | |
897 | ||
898 | ||
899 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
38fae1d3 | 900 | int ustctl_put_next_subbuf(struct lttng_ust_shm_handle *handle, |
4cfec15c | 901 | struct lttng_ust_lib_ring_buffer *buf) |
57773204 | 902 | { |
9bfc503d MD |
903 | if (!handle || !buf) |
904 | return -EINVAL; | |
905 | ||
57773204 MD |
906 | lib_ring_buffer_put_next_subbuf(buf, handle); |
907 | return 0; | |
908 | } | |
909 | ||
910 | /* snapshot */ | |
911 | ||
912 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
38fae1d3 | 913 | int ustctl_snapshot(struct lttng_ust_shm_handle *handle, |
4cfec15c | 914 | struct lttng_ust_lib_ring_buffer *buf) |
57773204 | 915 | { |
9bfc503d MD |
916 | if (!handle || !buf) |
917 | return -EINVAL; | |
918 | ||
57773204 MD |
919 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
920 | &buf->prod_snapshot, handle); | |
921 | } | |
922 | ||
923 | /* Get the consumer position (iteration start) */ | |
38fae1d3 | 924 | int ustctl_snapshot_get_consumed(struct lttng_ust_shm_handle *handle, |
4cfec15c | 925 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos) |
57773204 | 926 | { |
9bfc503d MD |
927 | if (!handle || !buf || !pos) |
928 | return -EINVAL; | |
929 | ||
57773204 MD |
930 | *pos = buf->cons_snapshot; |
931 | return 0; | |
932 | } | |
933 | ||
934 | /* Get the producer position (iteration end) */ | |
38fae1d3 | 935 | int ustctl_snapshot_get_produced(struct lttng_ust_shm_handle *handle, |
4cfec15c | 936 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos) |
57773204 | 937 | { |
9bfc503d MD |
938 | if (!handle || !buf || !pos) |
939 | return -EINVAL; | |
940 | ||
57773204 MD |
941 | *pos = buf->prod_snapshot; |
942 | return 0; | |
943 | } | |
944 | ||
945 | /* Get exclusive read access to the specified sub-buffer position */ | |
38fae1d3 | 946 | int ustctl_get_subbuf(struct lttng_ust_shm_handle *handle, |
4cfec15c | 947 | struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos) |
57773204 | 948 | { |
9bfc503d MD |
949 | if (!handle || !buf || !pos) |
950 | return -EINVAL; | |
951 | ||
57773204 MD |
952 | return lib_ring_buffer_get_subbuf(buf, *pos, handle); |
953 | } | |
954 | ||
955 | /* Release exclusive sub-buffer access */ | |
38fae1d3 | 956 | int ustctl_put_subbuf(struct lttng_ust_shm_handle *handle, |
4cfec15c | 957 | struct lttng_ust_lib_ring_buffer *buf) |
57773204 | 958 | { |
9bfc503d MD |
959 | if (!handle || !buf) |
960 | return -EINVAL; | |
961 | ||
57773204 MD |
962 | lib_ring_buffer_put_subbuf(buf, handle); |
963 | return 0; | |
964 | } | |
965 | ||
02a15cfb | 966 | void ustctl_flush_buffer(struct lttng_ust_shm_handle *handle, |
b52190f2 MD |
967 | struct lttng_ust_lib_ring_buffer *buf, |
968 | int producer_active) | |
57773204 | 969 | { |
9bfc503d | 970 | assert(handle && buf); |
b52190f2 MD |
971 | lib_ring_buffer_switch_slow(buf, |
972 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
973 | handle); | |
57773204 | 974 | } |