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> |
32ce8569 | 25 | #include <byteswap.h> |
44c72f10 MD |
26 | |
27 | #include <usterr-signal-safe.h> | |
b728d87e | 28 | #include <ust-comm.h> |
74d81a6c | 29 | #include <helper.h> |
57773204 MD |
30 | |
31 | #include "../libringbuffer/backend.h" | |
32 | #include "../libringbuffer/frontend.h" | |
c9023c93 MD |
33 | #include "../liblttng-ust/wait.h" |
34 | ||
35 | /* | |
36 | * Number of milliseconds to retry before failing metadata writes on | |
37 | * buffer full condition. (10 seconds) | |
38 | */ | |
39 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 | |
57773204 | 40 | |
74d81a6c MD |
41 | /* |
42 | * Channel representation within consumer. | |
43 | */ | |
44 | struct ustctl_consumer_channel { | |
45 | struct lttng_channel *chan; /* lttng channel buffers */ | |
6b120308 | 46 | |
74d81a6c MD |
47 | /* initial attributes */ |
48 | struct ustctl_consumer_channel_attr attr; | |
49 | }; | |
50 | ||
51 | /* | |
52 | * Stream representation within consumer. | |
53 | */ | |
54 | struct ustctl_consumer_stream { | |
55 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
56 | struct lttng_ust_lib_ring_buffer *buf; | |
57 | struct ustctl_consumer_channel *chan; | |
58 | int shm_fd, wait_fd, wakeup_fd; | |
59 | int cpu; | |
60 | uint64_t memory_map_size; | |
61 | }; | |
62 | ||
63 | extern void lttng_ring_buffer_client_overwrite_init(void); | |
64 | extern void lttng_ring_buffer_client_discard_init(void); | |
65 | extern void lttng_ring_buffer_metadata_client_init(void); | |
66 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
67 | extern void lttng_ring_buffer_client_discard_exit(void); | |
68 | extern void lttng_ring_buffer_metadata_client_exit(void); | |
69 | ||
70 | volatile enum ust_loglevel ust_loglevel; | |
57773204 | 71 | |
2be0e72c MD |
72 | int ustctl_release_handle(int sock, int handle) |
73 | { | |
74 | struct ustcomm_ust_msg lum; | |
75 | struct ustcomm_ust_reply lur; | |
2be0e72c | 76 | |
74d81a6c MD |
77 | if (sock < 0 || handle < 0) |
78 | return 0; | |
79 | memset(&lum, 0, sizeof(lum)); | |
80 | lum.handle = handle; | |
81 | lum.cmd = LTTNG_UST_RELEASE; | |
82 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 83 | } |
74d81a6c | 84 | |
12388166 MD |
85 | /* |
86 | * If sock is negative, it means we don't have to notify the other side | |
87 | * (e.g. application has already vanished). | |
88 | */ | |
d26228ae | 89 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 90 | { |
57773204 MD |
91 | int ret; |
92 | ||
9bfc503d MD |
93 | if (!data) |
94 | return -EINVAL; | |
95 | ||
74d81a6c MD |
96 | switch (data->type) { |
97 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
98 | free(data->u.channel.data); | |
99 | break; | |
100 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
101 | if (data->u.stream.shm_fd >= 0) { | |
102 | ret = close(data->u.stream.shm_fd); | |
103 | if (ret < 0) { | |
104 | ret = -errno; | |
105 | return ret; | |
106 | } | |
d26228ae | 107 | } |
74d81a6c MD |
108 | if (data->u.stream.wakeup_fd >= 0) { |
109 | ret = close(data->u.stream.wakeup_fd); | |
110 | if (ret < 0) { | |
111 | ret = -errno; | |
112 | return ret; | |
113 | } | |
d26228ae | 114 | } |
74d81a6c | 115 | break; |
32ce8569 MD |
116 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
117 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
118 | break; | |
74d81a6c MD |
119 | default: |
120 | assert(0); | |
d26228ae | 121 | } |
2be0e72c | 122 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
123 | } |
124 | ||
1c5e467e MD |
125 | /* |
126 | * Send registration done packet to the application. | |
127 | */ | |
128 | int ustctl_register_done(int sock) | |
129 | { | |
130 | struct ustcomm_ust_msg lum; | |
131 | struct ustcomm_ust_reply lur; | |
132 | int ret; | |
133 | ||
134 | DBG("Sending register done command to %d", sock); | |
135 | memset(&lum, 0, sizeof(lum)); | |
136 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
137 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
138 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
139 | if (ret) | |
140 | return ret; | |
1c5e467e | 141 | return 0; |
1c5e467e MD |
142 | } |
143 | ||
57773204 MD |
144 | /* |
145 | * returns session handle. | |
146 | */ | |
147 | int ustctl_create_session(int sock) | |
148 | { | |
149 | struct ustcomm_ust_msg lum; | |
150 | struct ustcomm_ust_reply lur; | |
151 | int ret, session_handle; | |
152 | ||
153 | /* Create session */ | |
154 | memset(&lum, 0, sizeof(lum)); | |
155 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
156 | lum.cmd = LTTNG_UST_SESSION; | |
157 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
158 | if (ret) | |
159 | return ret; | |
160 | session_handle = lur.ret_val; | |
161 | DBG("received session handle %u", session_handle); | |
162 | return session_handle; | |
163 | } | |
164 | ||
57773204 | 165 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
166 | struct lttng_ust_object_data *channel_data, |
167 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
168 | { |
169 | struct ustcomm_ust_msg lum; | |
170 | struct ustcomm_ust_reply lur; | |
61f02aea | 171 | struct lttng_ust_object_data *event_data; |
57773204 MD |
172 | int ret; |
173 | ||
9bfc503d MD |
174 | if (!channel_data || !_event_data) |
175 | return -EINVAL; | |
176 | ||
74d81a6c | 177 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
178 | if (!event_data) |
179 | return -ENOMEM; | |
32ce8569 | 180 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
181 | memset(&lum, 0, sizeof(lum)); |
182 | lum.handle = channel_data->handle; | |
183 | lum.cmd = LTTNG_UST_EVENT; | |
184 | strncpy(lum.u.event.name, ev->name, | |
185 | LTTNG_UST_SYM_NAME_LEN); | |
186 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
187 | lum.u.event.loglevel_type = ev->loglevel_type; |
188 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
189 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
190 | if (ret) { | |
191 | free(event_data); | |
192 | return ret; | |
193 | } | |
194 | event_data->handle = lur.ret_val; | |
195 | DBG("received event handle %u", event_data->handle); | |
196 | *_event_data = event_data; | |
197 | return 0; | |
198 | } | |
199 | ||
200 | int ustctl_add_context(int sock, struct lttng_ust_context *ctx, | |
61f02aea MD |
201 | struct lttng_ust_object_data *obj_data, |
202 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
203 | { |
204 | struct ustcomm_ust_msg lum; | |
205 | struct ustcomm_ust_reply lur; | |
61f02aea | 206 | struct lttng_ust_object_data *context_data; |
57773204 MD |
207 | int ret; |
208 | ||
9bfc503d MD |
209 | if (!obj_data || !_context_data) |
210 | return -EINVAL; | |
211 | ||
74d81a6c | 212 | context_data = zmalloc(sizeof(*context_data)); |
57773204 MD |
213 | if (!context_data) |
214 | return -ENOMEM; | |
32ce8569 | 215 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 216 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 217 | lum.handle = obj_data->handle; |
57773204 MD |
218 | lum.cmd = LTTNG_UST_CONTEXT; |
219 | lum.u.context.ctx = ctx->ctx; | |
220 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
221 | if (ret) { | |
222 | free(context_data); | |
223 | return ret; | |
224 | } | |
32ce8569 MD |
225 | context_data->handle = -1; |
226 | DBG("Context created successfully"); | |
57773204 MD |
227 | *_context_data = context_data; |
228 | return ret; | |
229 | } | |
230 | ||
cd54f6d9 MD |
231 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
232 | struct lttng_ust_object_data *obj_data) | |
233 | { | |
234 | struct ustcomm_ust_msg lum; | |
235 | struct ustcomm_ust_reply lur; | |
236 | int ret; | |
237 | ||
238 | if (!obj_data) | |
239 | return -EINVAL; | |
240 | ||
241 | memset(&lum, 0, sizeof(lum)); | |
242 | lum.handle = obj_data->handle; | |
243 | lum.cmd = LTTNG_UST_FILTER; | |
244 | lum.u.filter.data_size = bytecode->len; | |
245 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 246 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
247 | |
248 | ret = ustcomm_send_app_msg(sock, &lum); | |
249 | if (ret) | |
250 | return ret; | |
cd54f6d9 MD |
251 | /* send var len bytecode */ |
252 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
253 | bytecode->len); | |
254 | if (ret < 0) { | |
255 | return ret; | |
256 | } | |
7bc53e94 MD |
257 | if (ret != bytecode->len) |
258 | return -EINVAL; | |
259 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
260 | } |
261 | ||
57773204 | 262 | /* Enable event, channel and session ioctl */ |
61f02aea | 263 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
264 | { |
265 | struct ustcomm_ust_msg lum; | |
266 | struct ustcomm_ust_reply lur; | |
267 | int ret; | |
268 | ||
9bfc503d MD |
269 | if (!object) |
270 | return -EINVAL; | |
271 | ||
57773204 MD |
272 | memset(&lum, 0, sizeof(lum)); |
273 | lum.handle = object->handle; | |
274 | lum.cmd = LTTNG_UST_ENABLE; | |
275 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
276 | if (ret) | |
277 | return ret; | |
278 | DBG("enabled handle %u", object->handle); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | /* Disable event, channel and session ioctl */ | |
61f02aea | 283 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
284 | { |
285 | struct ustcomm_ust_msg lum; | |
286 | struct ustcomm_ust_reply lur; | |
287 | int ret; | |
288 | ||
9bfc503d MD |
289 | if (!object) |
290 | return -EINVAL; | |
291 | ||
57773204 MD |
292 | memset(&lum, 0, sizeof(lum)); |
293 | lum.handle = object->handle; | |
294 | lum.cmd = LTTNG_UST_DISABLE; | |
295 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
296 | if (ret) | |
297 | return ret; | |
298 | DBG("disable handle %u", object->handle); | |
299 | return 0; | |
300 | } | |
301 | ||
4a6ca058 | 302 | int ustctl_start_session(int sock, int handle) |
57773204 | 303 | { |
61f02aea | 304 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
305 | |
306 | obj.handle = handle; | |
307 | return ustctl_enable(sock, &obj); | |
57773204 MD |
308 | } |
309 | ||
4a6ca058 | 310 | int ustctl_stop_session(int sock, int handle) |
57773204 | 311 | { |
61f02aea | 312 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
313 | |
314 | obj.handle = handle; | |
315 | return ustctl_disable(sock, &obj); | |
57773204 MD |
316 | } |
317 | ||
57773204 MD |
318 | int ustctl_tracepoint_list(int sock) |
319 | { | |
b115631f MD |
320 | struct ustcomm_ust_msg lum; |
321 | struct ustcomm_ust_reply lur; | |
322 | int ret, tp_list_handle; | |
323 | ||
324 | memset(&lum, 0, sizeof(lum)); | |
325 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
326 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
327 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
328 | if (ret) | |
329 | return ret; | |
330 | tp_list_handle = lur.ret_val; | |
331 | DBG("received tracepoint list handle %u", tp_list_handle); | |
332 | return tp_list_handle; | |
333 | } | |
334 | ||
335 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 336 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
337 | { |
338 | struct ustcomm_ust_msg lum; | |
339 | struct ustcomm_ust_reply lur; | |
340 | int ret; | |
341 | ||
9bfc503d MD |
342 | if (!iter) |
343 | return -EINVAL; | |
344 | ||
b115631f MD |
345 | memset(&lum, 0, sizeof(lum)); |
346 | lum.handle = tp_list_handle; | |
347 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
348 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
349 | if (ret) | |
350 | return ret; | |
882a56d7 | 351 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 352 | lur.u.tracepoint.name, |
882a56d7 | 353 | lur.u.tracepoint.loglevel); |
cbef6901 | 354 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 355 | return 0; |
57773204 MD |
356 | } |
357 | ||
40003310 MD |
358 | int ustctl_tracepoint_field_list(int sock) |
359 | { | |
360 | struct ustcomm_ust_msg lum; | |
361 | struct ustcomm_ust_reply lur; | |
362 | int ret, tp_field_list_handle; | |
363 | ||
364 | memset(&lum, 0, sizeof(lum)); | |
365 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
366 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
367 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
368 | if (ret) | |
369 | return ret; | |
370 | tp_field_list_handle = lur.ret_val; | |
371 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
372 | return tp_field_list_handle; | |
373 | } | |
374 | ||
375 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
376 | struct lttng_ust_field_iter *iter) | |
377 | { | |
378 | struct ustcomm_ust_msg lum; | |
379 | struct ustcomm_ust_reply lur; | |
380 | int ret; | |
381 | ssize_t len; | |
382 | ||
383 | if (!iter) | |
384 | return -EINVAL; | |
385 | ||
386 | memset(&lum, 0, sizeof(lum)); | |
387 | lum.handle = tp_field_list_handle; | |
388 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
389 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
390 | if (ret) | |
391 | return ret; | |
392 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
393 | if (len != sizeof(*iter)) { | |
394 | return -EINVAL; | |
395 | } | |
396 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
397 | iter->event_name, | |
398 | iter->loglevel, | |
399 | iter->field_name, | |
400 | iter->type); | |
401 | return 0; | |
402 | } | |
403 | ||
57773204 MD |
404 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
405 | { | |
406 | struct ustcomm_ust_msg lum; | |
407 | struct ustcomm_ust_reply lur; | |
408 | int ret; | |
409 | ||
9bfc503d MD |
410 | if (!v) |
411 | return -EINVAL; | |
412 | ||
57773204 MD |
413 | memset(&lum, 0, sizeof(lum)); |
414 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
415 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
416 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
417 | if (ret) | |
418 | return ret; | |
419 | memcpy(v, &lur.u.version, sizeof(*v)); | |
420 | DBG("received tracer version"); | |
421 | return 0; | |
422 | } | |
423 | ||
424 | int ustctl_wait_quiescent(int sock) | |
425 | { | |
426 | struct ustcomm_ust_msg lum; | |
427 | struct ustcomm_ust_reply lur; | |
428 | int ret; | |
429 | ||
430 | memset(&lum, 0, sizeof(lum)); | |
431 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
432 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
433 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
434 | if (ret) | |
435 | return ret; | |
436 | DBG("waited for quiescent state"); | |
437 | return 0; | |
438 | } | |
439 | ||
440 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
441 | { | |
9bfc503d MD |
442 | if (!calibrate) |
443 | return -EINVAL; | |
444 | ||
57773204 MD |
445 | return -ENOSYS; |
446 | } | |
447 | ||
f1fffc57 MD |
448 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
449 | { | |
450 | struct ustcomm_ust_msg lum; | |
451 | struct ustcomm_ust_reply lur; | |
452 | int ret; | |
453 | ||
9bfc503d MD |
454 | if (!object) |
455 | return -EINVAL; | |
456 | ||
f1fffc57 MD |
457 | memset(&lum, 0, sizeof(lum)); |
458 | lum.handle = object->handle; | |
459 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
460 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
461 | if (ret) | |
462 | return ret; | |
463 | DBG("flushed buffer handle %u", object->handle); | |
464 | return 0; | |
465 | } | |
466 | ||
74d81a6c MD |
467 | static |
468 | int ustctl_send_channel(int sock, | |
469 | enum lttng_ust_chan_type type, | |
470 | void *data, | |
471 | uint64_t size, | |
472 | int send_fd_only) | |
473 | { | |
474 | ssize_t len; | |
475 | ||
476 | if (!send_fd_only) { | |
477 | /* Send mmap size */ | |
478 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
479 | if (len != sizeof(size)) { | |
480 | if (len < 0) | |
481 | return len; | |
482 | else | |
483 | return -EIO; | |
484 | } | |
485 | ||
486 | /* Send channel type */ | |
487 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
488 | if (len != sizeof(type)) { | |
489 | if (len < 0) | |
490 | return len; | |
491 | else | |
492 | return -EIO; | |
493 | } | |
494 | } | |
495 | ||
496 | /* Send channel data */ | |
497 | len = ustcomm_send_unix_sock(sock, data, size); | |
498 | if (len != size) { | |
499 | if (len < 0) | |
500 | return len; | |
501 | else | |
502 | return -EIO; | |
503 | } | |
57773204 | 504 | |
74d81a6c MD |
505 | return 0; |
506 | } | |
507 | ||
508 | static | |
509 | int ustctl_send_stream(int sock, | |
510 | uint32_t stream_nr, | |
511 | uint64_t memory_map_size, | |
512 | int shm_fd, int wakeup_fd, | |
513 | int send_fd_only) | |
57773204 | 514 | { |
74d81a6c MD |
515 | ssize_t len; |
516 | int fds[2]; | |
517 | ||
518 | if (!send_fd_only) { | |
519 | if (shm_fd < 0) { | |
520 | /* finish iteration */ | |
521 | uint64_t v = -1; | |
522 | ||
523 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
524 | if (len != sizeof(v)) { | |
525 | if (len < 0) | |
526 | return len; | |
527 | else | |
528 | return -EIO; | |
529 | } | |
530 | return 0; | |
531 | } | |
532 | ||
533 | /* Send mmap size */ | |
534 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
535 | sizeof(memory_map_size)); | |
536 | if (len != sizeof(memory_map_size)) { | |
537 | if (len < 0) | |
538 | return len; | |
539 | else | |
540 | return -EIO; | |
541 | } | |
542 | ||
543 | /* Send stream nr */ | |
544 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
545 | sizeof(stream_nr)); | |
546 | if (len != sizeof(stream_nr)) { | |
547 | if (len < 0) | |
548 | return len; | |
549 | else | |
550 | return -EIO; | |
551 | } | |
552 | } | |
553 | ||
554 | /* Send shm fd and wakeup fd */ | |
555 | fds[0] = shm_fd; | |
556 | fds[1] = wakeup_fd; | |
557 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
558 | if (len <= 0) { | |
559 | if (len < 0) | |
560 | return len; | |
561 | else | |
562 | return -EIO; | |
563 | } | |
564 | return 0; | |
565 | } | |
566 | ||
567 | int ustctl_recv_channel_from_consumer(int sock, | |
568 | struct lttng_ust_object_data **_channel_data) | |
569 | { | |
570 | struct lttng_ust_object_data *channel_data; | |
571 | ssize_t len; | |
7a784989 | 572 | int ret; |
57773204 | 573 | |
74d81a6c MD |
574 | channel_data = zmalloc(sizeof(*channel_data)); |
575 | if (!channel_data) { | |
576 | ret = -ENOMEM; | |
577 | goto error_alloc; | |
578 | } | |
579 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
580 | ||
581 | /* recv mmap size */ | |
582 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
583 | sizeof(channel_data->size)); | |
584 | if (len != sizeof(channel_data->size)) { | |
585 | if (len < 0) | |
586 | ret = len; | |
587 | else | |
588 | ret = -EINVAL; | |
589 | goto error; | |
590 | } | |
9bfc503d | 591 | |
74d81a6c MD |
592 | /* recv channel type */ |
593 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
594 | sizeof(channel_data->u.channel.type)); | |
595 | if (len != sizeof(channel_data->u.channel.type)) { | |
596 | if (len < 0) | |
597 | ret = len; | |
598 | else | |
599 | ret = -EINVAL; | |
600 | goto error; | |
601 | } | |
602 | ||
603 | /* recv channel data */ | |
604 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
605 | if (!channel_data->u.channel.data) { | |
606 | ret = -ENOMEM; | |
607 | goto error; | |
608 | } | |
609 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
610 | channel_data->size); | |
611 | if (len != channel_data->size) { | |
612 | if (len < 0) | |
613 | ret = len; | |
614 | else | |
615 | ret = -EINVAL; | |
616 | goto error_recv_data; | |
617 | } | |
618 | ||
619 | *_channel_data = channel_data; | |
620 | return 0; | |
621 | ||
622 | error_recv_data: | |
623 | free(channel_data->u.channel.data); | |
624 | error: | |
625 | free(channel_data); | |
626 | error_alloc: | |
627 | return ret; | |
628 | } | |
629 | ||
630 | int ustctl_recv_stream_from_consumer(int sock, | |
631 | struct lttng_ust_object_data **_stream_data) | |
632 | { | |
633 | struct lttng_ust_object_data *stream_data; | |
634 | ssize_t len; | |
635 | int ret; | |
636 | int fds[2]; | |
637 | ||
638 | stream_data = zmalloc(sizeof(*stream_data)); | |
639 | if (!stream_data) { | |
640 | ret = -ENOMEM; | |
641 | goto error_alloc; | |
57773204 | 642 | } |
74d81a6c MD |
643 | |
644 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
645 | stream_data->handle = -1; | |
646 | ||
647 | /* recv mmap size */ | |
648 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
649 | sizeof(stream_data->size)); | |
650 | if (len != sizeof(stream_data->size)) { | |
651 | if (len < 0) | |
652 | ret = len; | |
653 | else | |
654 | ret = -EINVAL; | |
655 | goto error; | |
656 | } | |
657 | if (stream_data->size == -1) { | |
658 | ret = -LTTNG_UST_ERR_NOENT; | |
659 | goto error; | |
660 | } | |
661 | ||
662 | /* recv stream nr */ | |
663 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
664 | sizeof(stream_data->u.stream.stream_nr)); | |
665 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
666 | if (len < 0) | |
667 | ret = len; | |
668 | else | |
669 | ret = -EINVAL; | |
670 | goto error; | |
671 | } | |
672 | ||
673 | /* recv shm fd and wakeup fd */ | |
674 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
675 | if (len <= 0) { | |
676 | if (len < 0) { | |
677 | ret = len; | |
678 | goto error; | |
679 | } else { | |
680 | ret = -EIO; | |
681 | goto error; | |
0bfe09ec | 682 | } |
0bfe09ec | 683 | } |
74d81a6c MD |
684 | stream_data->u.stream.shm_fd = fds[0]; |
685 | stream_data->u.stream.wakeup_fd = fds[1]; | |
686 | *_stream_data = stream_data; | |
687 | return 0; | |
0bfe09ec | 688 | |
74d81a6c MD |
689 | error: |
690 | free(stream_data); | |
691 | error_alloc: | |
692 | return ret; | |
693 | } | |
694 | ||
695 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
696 | struct lttng_ust_object_data *channel_data) | |
697 | { | |
698 | struct ustcomm_ust_msg lum; | |
699 | struct ustcomm_ust_reply lur; | |
700 | int ret; | |
701 | ||
702 | if (!channel_data) | |
703 | return -EINVAL; | |
704 | ||
705 | memset(&lum, 0, sizeof(lum)); | |
706 | lum.handle = session_handle; | |
707 | lum.cmd = LTTNG_UST_CHANNEL; | |
708 | lum.u.channel.len = channel_data->size; | |
709 | lum.u.channel.type = channel_data->u.channel.type; | |
710 | ret = ustcomm_send_app_msg(sock, &lum); | |
711 | if (ret) | |
712 | return ret; | |
713 | ||
714 | ret = ustctl_send_channel(sock, | |
715 | channel_data->u.channel.type, | |
716 | channel_data->u.channel.data, | |
717 | channel_data->size, | |
718 | 1); | |
719 | if (ret) | |
720 | return ret; | |
721 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
722 | if (!ret) { | |
723 | if (lur.ret_val >= 0) { | |
724 | channel_data->handle = lur.ret_val; | |
725 | } | |
57773204 | 726 | } |
74d81a6c MD |
727 | return ret; |
728 | } | |
729 | ||
730 | int ustctl_send_stream_to_ust(int sock, | |
731 | struct lttng_ust_object_data *channel_data, | |
732 | struct lttng_ust_object_data *stream_data) | |
733 | { | |
734 | struct ustcomm_ust_msg lum; | |
735 | struct ustcomm_ust_reply lur; | |
736 | int ret; | |
737 | ||
738 | memset(&lum, 0, sizeof(lum)); | |
739 | lum.handle = channel_data->handle; | |
740 | lum.cmd = LTTNG_UST_STREAM; | |
741 | lum.u.stream.len = stream_data->size; | |
742 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
743 | ret = ustcomm_send_app_msg(sock, &lum); | |
744 | if (ret) | |
745 | return ret; | |
746 | ||
747 | assert(stream_data); | |
748 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
749 | ||
750 | ret = ustctl_send_stream(sock, | |
751 | stream_data->u.stream.stream_nr, | |
752 | stream_data->size, | |
753 | stream_data->u.stream.shm_fd, | |
754 | stream_data->u.stream.wakeup_fd, 1); | |
755 | if (ret) | |
756 | return ret; | |
757 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
758 | } | |
759 | ||
760 | ||
761 | /* Buffer operations */ | |
762 | ||
763 | struct ustctl_consumer_channel * | |
764 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr) | |
765 | { | |
766 | struct ustctl_consumer_channel *chan; | |
767 | const char *transport_name; | |
768 | struct lttng_transport *transport; | |
769 | ||
770 | switch (attr->type) { | |
771 | case LTTNG_UST_CHAN_PER_CPU: | |
772 | if (attr->output == LTTNG_UST_MMAP) { | |
773 | transport_name = attr->overwrite ? | |
774 | "relay-overwrite-mmap" : "relay-discard-mmap"; | |
775 | } else { | |
776 | return NULL; | |
777 | } | |
c1fca457 | 778 | break; |
74d81a6c MD |
779 | case LTTNG_UST_CHAN_METADATA: |
780 | if (attr->output == LTTNG_UST_MMAP) | |
781 | transport_name = "relay-metadata-mmap"; | |
782 | else | |
783 | return NULL; | |
c1fca457 MD |
784 | break; |
785 | default: | |
74d81a6c | 786 | transport_name = "<unknown>"; |
c1fca457 MD |
787 | return NULL; |
788 | } | |
74d81a6c MD |
789 | |
790 | transport = lttng_transport_find(transport_name); | |
791 | if (!transport) { | |
792 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 793 | transport_name); |
74d81a6c | 794 | return NULL; |
7a784989 | 795 | } |
74d81a6c MD |
796 | |
797 | chan = zmalloc(sizeof(*chan)); | |
798 | if (!chan) | |
799 | return NULL; | |
800 | ||
801 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 802 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 803 | attr->switch_timer_interval, |
32ce8569 | 804 | attr->read_timer_interval, |
74d81a6c MD |
805 | attr->uuid); |
806 | if (!chan->chan) { | |
807 | goto chan_error; | |
808 | } | |
809 | chan->chan->ops = &transport->ops; | |
810 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
811 | return chan; | |
812 | ||
813 | chan_error: | |
814 | free(chan); | |
815 | return NULL; | |
57773204 MD |
816 | } |
817 | ||
74d81a6c | 818 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 819 | { |
74d81a6c MD |
820 | chan->chan->ops->channel_destroy(chan->chan); |
821 | free(chan); | |
822 | } | |
823 | ||
824 | int ustctl_send_channel_to_sessiond(int sock, | |
825 | struct ustctl_consumer_channel *channel) | |
826 | { | |
827 | struct shm_object_table *table; | |
57773204 | 828 | |
74d81a6c MD |
829 | table = channel->chan->handle->table; |
830 | if (table->size <= 0) | |
9bfc503d | 831 | return -EINVAL; |
74d81a6c MD |
832 | return ustctl_send_channel(sock, |
833 | channel->attr.type, | |
834 | table->objects[0].memory_map, | |
835 | table->objects[0].memory_map_size, | |
836 | 0); | |
837 | } | |
9bfc503d | 838 | |
74d81a6c MD |
839 | int ustctl_send_stream_to_sessiond(int sock, |
840 | struct ustctl_consumer_stream *stream) | |
841 | { | |
842 | if (!stream) | |
843 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
844 | ||
845 | return ustctl_send_stream(sock, | |
846 | stream->cpu, | |
847 | stream->memory_map_size, | |
848 | stream->shm_fd, stream->wakeup_fd, | |
849 | 0); | |
57773204 MD |
850 | } |
851 | ||
c9023c93 MD |
852 | int ustctl_write_metadata_to_channel( |
853 | struct ustctl_consumer_channel *channel, | |
854 | const char *metadata_str, /* NOT null-terminated */ | |
855 | size_t len) /* metadata length */ | |
856 | { | |
857 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
858 | struct lttng_channel *chan = channel->chan; | |
859 | const char *str = metadata_str; | |
860 | int ret = 0, waitret; | |
861 | size_t reserve_len, pos; | |
862 | ||
863 | for (pos = 0; pos < len; pos += reserve_len) { | |
864 | reserve_len = min_t(size_t, | |
865 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
866 | len - pos); | |
867 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
868 | sizeof(char), -1, chan->handle); | |
869 | /* | |
870 | * We don't care about metadata buffer's records lost | |
871 | * count, because we always retry here. Report error if | |
872 | * we need to bail out after timeout or being | |
873 | * interrupted. | |
874 | */ | |
875 | waitret = wait_cond_interruptible_timeout( | |
876 | ({ | |
877 | ret = chan->ops->event_reserve(&ctx, 0); | |
878 | ret != -ENOBUFS || !ret; | |
879 | }), | |
880 | LTTNG_METADATA_TIMEOUT_MSEC); | |
881 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
882 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
883 | waitret == -EINTR ? "interrupted" : | |
884 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
885 | if (waitret == -EINTR) | |
886 | ret = waitret; | |
887 | goto end; | |
888 | } | |
889 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
890 | chan->ops->event_commit(&ctx); | |
891 | } | |
892 | end: | |
893 | return ret; | |
894 | } | |
895 | ||
74d81a6c | 896 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
897 | { |
898 | struct channel *chan; | |
899 | ||
74d81a6c MD |
900 | chan = stream->chan->chan->chan; |
901 | return ring_buffer_close_wait_fd(&chan->backend.config, | |
902 | chan, stream->handle, stream->cpu); | |
5224b5c8 MD |
903 | } |
904 | ||
74d81a6c | 905 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 906 | { |
66bdd22a | 907 | struct channel *chan; |
74d81a6c MD |
908 | |
909 | chan = stream->chan->chan->chan; | |
910 | return ring_buffer_close_wakeup_fd(&chan->backend.config, | |
911 | chan, stream->handle, stream->cpu); | |
912 | } | |
913 | ||
914 | struct ustctl_consumer_stream * | |
915 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
916 | int cpu) | |
917 | { | |
918 | struct ustctl_consumer_stream *stream; | |
919 | struct lttng_ust_shm_handle *handle; | |
920 | struct channel *chan; | |
921 | int shm_fd, wait_fd, wakeup_fd; | |
922 | uint64_t memory_map_size; | |
4cfec15c | 923 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
924 | int ret; |
925 | ||
74d81a6c MD |
926 | if (!channel) |
927 | return NULL; | |
928 | handle = channel->chan->handle; | |
9bfc503d MD |
929 | if (!handle) |
930 | return NULL; | |
931 | ||
74d81a6c | 932 | chan = channel->chan->chan; |
6e922b24 | 933 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
934 | chan, cpu, handle, &shm_fd, &wait_fd, |
935 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
936 | if (!buf) |
937 | return NULL; | |
74d81a6c | 938 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
939 | if (ret) |
940 | return NULL; | |
74d81a6c MD |
941 | |
942 | stream = zmalloc(sizeof(*stream)); | |
943 | if (!stream) | |
944 | goto alloc_error; | |
945 | stream->handle = handle; | |
946 | stream->buf = buf; | |
947 | stream->chan = channel; | |
948 | stream->shm_fd = shm_fd; | |
949 | stream->wait_fd = wait_fd; | |
950 | stream->wakeup_fd = wakeup_fd; | |
951 | stream->memory_map_size = memory_map_size; | |
952 | stream->cpu = cpu; | |
953 | return stream; | |
954 | ||
955 | alloc_error: | |
956 | return NULL; | |
957 | } | |
958 | ||
959 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
960 | { | |
961 | struct lttng_ust_lib_ring_buffer *buf; | |
962 | struct ustctl_consumer_channel *consumer_chan; | |
963 | ||
964 | assert(stream); | |
965 | buf = stream->buf; | |
966 | consumer_chan = stream->chan; | |
967 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); | |
968 | free(stream); | |
6e922b24 MD |
969 | } |
970 | ||
74d81a6c | 971 | int ustctl_get_wait_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 972 | { |
74d81a6c MD |
973 | struct lttng_ust_lib_ring_buffer *buf; |
974 | struct ustctl_consumer_channel *consumer_chan; | |
975 | ||
976 | if (!stream) | |
977 | return -EINVAL; | |
978 | buf = stream->buf; | |
979 | consumer_chan = stream->chan; | |
980 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
981 | } | |
982 | ||
983 | int ustctl_get_wakeup_fd(struct ustctl_consumer_stream *stream) | |
984 | { | |
985 | struct lttng_ust_lib_ring_buffer *buf; | |
986 | struct ustctl_consumer_channel *consumer_chan; | |
987 | ||
988 | if (!stream) | |
989 | return -EINVAL; | |
990 | buf = stream->buf; | |
991 | consumer_chan = stream->chan; | |
992 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
993 | } |
994 | ||
57773204 MD |
995 | /* For mmap mode, readable without "get" operation */ |
996 | ||
74d81a6c | 997 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 998 | { |
74d81a6c MD |
999 | struct lttng_ust_lib_ring_buffer *buf; |
1000 | struct ustctl_consumer_channel *consumer_chan; | |
1001 | ||
1002 | if (!stream) | |
9bfc503d | 1003 | return NULL; |
74d81a6c MD |
1004 | buf = stream->buf; |
1005 | consumer_chan = stream->chan; | |
1006 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1007 | } |
1008 | ||
57773204 | 1009 | /* returns the length to mmap. */ |
74d81a6c | 1010 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1011 | unsigned long *len) |
1012 | { | |
74d81a6c | 1013 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1014 | unsigned long mmap_buf_len; |
66bdd22a | 1015 | struct channel *chan; |
57773204 | 1016 | |
74d81a6c | 1017 | if (!stream) |
9bfc503d | 1018 | return -EINVAL; |
74d81a6c MD |
1019 | consumer_chan = stream->chan; |
1020 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1021 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1022 | return -EINVAL; | |
1023 | mmap_buf_len = chan->backend.buf_size; | |
1024 | if (chan->backend.extra_reader_sb) | |
1025 | mmap_buf_len += chan->backend.subbuf_size; | |
1026 | if (mmap_buf_len > INT_MAX) | |
1027 | return -EFBIG; | |
1028 | *len = mmap_buf_len; | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1033 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1034 | unsigned long *len) |
1035 | { | |
74d81a6c | 1036 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1037 | struct channel *chan; |
57773204 | 1038 | |
74d81a6c | 1039 | if (!stream) |
9bfc503d | 1040 | return -EINVAL; |
74d81a6c MD |
1041 | consumer_chan = stream->chan; |
1042 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1043 | *len = chan->backend.subbuf_size; |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | /* | |
1048 | * For mmap mode, operate on the current packet (between get/put or | |
1049 | * get_next/put_next). | |
1050 | */ | |
1051 | ||
1052 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1053 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1054 | unsigned long *off) | |
57773204 | 1055 | { |
66bdd22a | 1056 | struct channel *chan; |
57773204 | 1057 | unsigned long sb_bindex; |
74d81a6c MD |
1058 | struct lttng_ust_lib_ring_buffer *buf; |
1059 | struct ustctl_consumer_channel *consumer_chan; | |
57773204 | 1060 | |
74d81a6c | 1061 | if (!stream) |
9bfc503d | 1062 | return -EINVAL; |
74d81a6c MD |
1063 | buf = stream->buf; |
1064 | consumer_chan = stream->chan; | |
1065 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1066 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1067 | return -EINVAL; | |
1068 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1069 | buf->backend.buf_rsb.id); |
74d81a6c MD |
1070 | *off = shmp(consumer_chan->chan->handle, |
1071 | shmp_index(consumer_chan->chan->handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset; | |
57773204 MD |
1072 | return 0; |
1073 | } | |
1074 | ||
1075 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1076 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1077 | unsigned long *len) | |
57773204 | 1078 | { |
74d81a6c | 1079 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1080 | struct channel *chan; |
74d81a6c | 1081 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1082 | |
74d81a6c | 1083 | if (!stream) |
9bfc503d MD |
1084 | return -EINVAL; |
1085 | ||
74d81a6c MD |
1086 | buf = stream->buf; |
1087 | consumer_chan = stream->chan; | |
1088 | chan = consumer_chan->chan->chan; | |
57773204 | 1089 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1090 | consumer_chan->chan->handle); |
57773204 MD |
1091 | return 0; |
1092 | } | |
1093 | ||
1094 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1095 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1096 | unsigned long *len) | |
57773204 | 1097 | { |
74d81a6c | 1098 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1099 | struct channel *chan; |
74d81a6c | 1100 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1101 | |
74d81a6c | 1102 | if (!stream) |
9bfc503d | 1103 | return -EINVAL; |
74d81a6c MD |
1104 | buf = stream->buf; |
1105 | consumer_chan = stream->chan; | |
1106 | chan = consumer_chan->chan->chan; | |
57773204 | 1107 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1108 | consumer_chan->chan->handle); |
57773204 MD |
1109 | *len = PAGE_ALIGN(*len); |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1114 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1115 | { |
74d81a6c MD |
1116 | struct lttng_ust_lib_ring_buffer *buf; |
1117 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1118 | |
74d81a6c MD |
1119 | if (!stream) |
1120 | return -EINVAL; | |
1121 | buf = stream->buf; | |
1122 | consumer_chan = stream->chan; | |
1123 | return lib_ring_buffer_get_next_subbuf(buf, | |
1124 | consumer_chan->chan->handle); | |
57773204 MD |
1125 | } |
1126 | ||
1127 | ||
1128 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1129 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1130 | { |
74d81a6c MD |
1131 | struct lttng_ust_lib_ring_buffer *buf; |
1132 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1133 | |
74d81a6c MD |
1134 | if (!stream) |
1135 | return -EINVAL; | |
1136 | buf = stream->buf; | |
1137 | consumer_chan = stream->chan; | |
1138 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1139 | return 0; |
1140 | } | |
1141 | ||
1142 | /* snapshot */ | |
1143 | ||
1144 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1145 | int ustctl_snapshot(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; | |
57773204 | 1154 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1155 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1156 | } |
1157 | ||
1158 | /* Get the consumer position (iteration start) */ | |
74d81a6c MD |
1159 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1160 | unsigned long *pos) | |
57773204 | 1161 | { |
74d81a6c | 1162 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1163 | |
74d81a6c MD |
1164 | if (!stream) |
1165 | return -EINVAL; | |
1166 | buf = stream->buf; | |
57773204 MD |
1167 | *pos = buf->cons_snapshot; |
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1172 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1173 | unsigned long *pos) | |
57773204 | 1174 | { |
74d81a6c | 1175 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1176 | |
74d81a6c MD |
1177 | if (!stream) |
1178 | return -EINVAL; | |
1179 | buf = stream->buf; | |
57773204 MD |
1180 | *pos = buf->prod_snapshot; |
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1185 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1186 | unsigned long *pos) | |
57773204 | 1187 | { |
74d81a6c MD |
1188 | struct lttng_ust_lib_ring_buffer *buf; |
1189 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1190 | |
74d81a6c MD |
1191 | if (!stream) |
1192 | return -EINVAL; | |
1193 | buf = stream->buf; | |
1194 | consumer_chan = stream->chan; | |
1195 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1196 | consumer_chan->chan->handle); | |
57773204 MD |
1197 | } |
1198 | ||
1199 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1200 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1201 | { |
74d81a6c MD |
1202 | struct lttng_ust_lib_ring_buffer *buf; |
1203 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1204 | |
74d81a6c MD |
1205 | if (!stream) |
1206 | return -EINVAL; | |
1207 | buf = stream->buf; | |
1208 | consumer_chan = stream->chan; | |
1209 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1210 | return 0; |
1211 | } | |
1212 | ||
74d81a6c | 1213 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1214 | int producer_active) |
57773204 | 1215 | { |
74d81a6c MD |
1216 | struct lttng_ust_lib_ring_buffer *buf; |
1217 | struct ustctl_consumer_channel *consumer_chan; | |
1218 | ||
1219 | assert(stream); | |
1220 | buf = stream->buf; | |
1221 | consumer_chan = stream->chan; | |
b52190f2 MD |
1222 | lib_ring_buffer_switch_slow(buf, |
1223 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1224 | consumer_chan->chan->handle); |
1225 | } | |
1226 | ||
32ce8569 MD |
1227 | /* |
1228 | * Returns 0 on success, negative error value on error. | |
1229 | */ | |
1230 | int ustctl_recv_reg_msg(int sock, | |
1231 | enum ustctl_socket_type *type, | |
1232 | uint32_t *major, | |
1233 | uint32_t *minor, | |
1234 | uint32_t *pid, | |
1235 | uint32_t *ppid, | |
1236 | uint32_t *uid, | |
1237 | uint32_t *gid, | |
1238 | uint32_t *bits_per_long, | |
1239 | uint32_t *uint8_t_alignment, | |
1240 | uint32_t *uint16_t_alignment, | |
1241 | uint32_t *uint32_t_alignment, | |
1242 | uint32_t *uint64_t_alignment, | |
1243 | uint32_t *long_alignment, | |
1244 | int *byte_order, | |
1245 | char *name) | |
1246 | { | |
1247 | ssize_t len; | |
1248 | struct ustctl_reg_msg reg_msg; | |
1249 | ||
1250 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
1251 | if (len > 0 && len != sizeof(reg_msg)) | |
1252 | return -EIO; | |
1253 | if (len == 0) | |
1254 | return -EPIPE; | |
1255 | if (len < 0) | |
1256 | return len; | |
1257 | ||
1258 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
1259 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1260 | BIG_ENDIAN : LITTLE_ENDIAN; | |
1261 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
1262 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1263 | LITTLE_ENDIAN : BIG_ENDIAN; | |
1264 | } else { | |
1265 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
1266 | } | |
1267 | switch (reg_msg.socket_type) { | |
1268 | case 0: *type = USTCTL_SOCKET_CMD; | |
1269 | break; | |
1270 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
1271 | break; | |
1272 | default: | |
1273 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
1274 | } | |
1275 | *major = reg_msg.major; | |
1276 | *minor = reg_msg.minor; | |
1277 | *pid = reg_msg.pid; | |
1278 | *ppid = reg_msg.ppid; | |
1279 | *uid = reg_msg.uid; | |
1280 | *gid = reg_msg.gid; | |
1281 | *bits_per_long = reg_msg.bits_per_long; | |
1282 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
1283 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
1284 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
1285 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
1286 | *long_alignment = reg_msg.long_alignment; | |
1287 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
1288 | if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) { | |
1289 | return -LTTNG_UST_ERR_UNSUP_MAJOR; | |
1290 | } | |
1291 | ||
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
1296 | { | |
1297 | struct ustcomm_notify_hdr header; | |
1298 | ssize_t len; | |
1299 | ||
1300 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
1301 | if (len > 0 && len != sizeof(header)) | |
1302 | return -EIO; | |
1303 | if (len == 0) | |
1304 | return -EPIPE; | |
1305 | if (len < 0) | |
1306 | return len; | |
1307 | switch (header.notify_cmd) { | |
1308 | case 0: | |
1309 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1310 | break; | |
1311 | case 1: | |
1312 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1313 | break; | |
1314 | default: | |
1315 | return -EINVAL; | |
1316 | } | |
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | /* | |
1321 | * Returns 0 on success, negative error value on error. | |
1322 | */ | |
1323 | int ustctl_recv_register_event(int sock, | |
1324 | int *session_objd, | |
1325 | int *channel_objd, | |
1326 | char *event_name, | |
1327 | int *loglevel, | |
1328 | char **signature, | |
1329 | size_t *nr_fields, | |
1330 | struct ustctl_field **fields, | |
1331 | char **model_emf_uri) | |
1332 | { | |
1333 | ssize_t len; | |
1334 | struct ustcomm_notify_event_msg msg; | |
1335 | size_t signature_len, fields_len, model_emf_uri_len; | |
1336 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
1337 | struct ustctl_field *a_fields = NULL; | |
1338 | ||
1339 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1340 | if (len > 0 && len != sizeof(msg)) | |
1341 | return -EIO; | |
1342 | if (len == 0) | |
1343 | return -EPIPE; | |
1344 | if (len < 0) | |
1345 | return len; | |
1346 | ||
1347 | *session_objd = msg.session_objd; | |
1348 | *channel_objd = msg.channel_objd; | |
1349 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1350 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1351 | *loglevel = msg.loglevel; | |
1352 | signature_len = msg.signature_len; | |
1353 | fields_len = msg.fields_len; | |
1354 | ||
1355 | if (fields_len % sizeof(*a_fields) != 0) { | |
1356 | return -EINVAL; | |
1357 | } | |
1358 | ||
1359 | model_emf_uri_len = msg.model_emf_uri_len; | |
1360 | ||
1361 | /* recv signature. contains at least \0. */ | |
1362 | a_sign = zmalloc(signature_len); | |
1363 | if (!a_sign) | |
1364 | return -ENOMEM; | |
1365 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
1366 | if (len > 0 && len != signature_len) { | |
1367 | len = -EIO; | |
1368 | goto signature_error; | |
1369 | } | |
1370 | if (len == 0) { | |
1371 | len = -EPIPE; | |
1372 | goto signature_error; | |
1373 | } | |
1374 | if (len < 0) { | |
1375 | goto signature_error; | |
1376 | } | |
1377 | /* Enforce end of string */ | |
1378 | signature[signature_len - 1] = '\0'; | |
1379 | ||
1380 | /* recv fields */ | |
1381 | if (fields_len) { | |
1382 | a_fields = zmalloc(fields_len); | |
1383 | if (!a_fields) { | |
1384 | len = -ENOMEM; | |
1385 | goto signature_error; | |
1386 | } | |
1387 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1388 | if (len > 0 && len != fields_len) { | |
1389 | len = -EIO; | |
1390 | goto fields_error; | |
1391 | } | |
1392 | if (len == 0) { | |
1393 | len = -EPIPE; | |
1394 | goto fields_error; | |
1395 | } | |
1396 | if (len < 0) { | |
1397 | goto fields_error; | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | if (model_emf_uri_len) { | |
1402 | /* recv model_emf_uri_len */ | |
1403 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
1404 | if (!a_model_emf_uri) { | |
1405 | len = -ENOMEM; | |
1406 | goto fields_error; | |
1407 | } | |
1408 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
1409 | model_emf_uri_len); | |
1410 | if (len > 0 && len != model_emf_uri_len) { | |
1411 | len = -EIO; | |
1412 | goto model_error; | |
1413 | } | |
1414 | if (len == 0) { | |
1415 | len = -EPIPE; | |
1416 | goto model_error; | |
1417 | } | |
1418 | if (len < 0) { | |
1419 | goto model_error; | |
1420 | } | |
1421 | /* Enforce end of string */ | |
1422 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
1423 | } | |
1424 | ||
1425 | *signature = a_sign; | |
1426 | *nr_fields = fields_len / sizeof(*a_fields); | |
1427 | *fields = a_fields; | |
1428 | *model_emf_uri = a_model_emf_uri; | |
1429 | ||
1430 | return 0; | |
1431 | ||
1432 | model_error: | |
1433 | free(a_model_emf_uri); | |
1434 | fields_error: | |
1435 | free(a_fields); | |
1436 | signature_error: | |
1437 | free(a_sign); | |
1438 | return len; | |
1439 | } | |
1440 | ||
1441 | /* | |
1442 | * Returns 0 on success, negative error value on error. | |
1443 | */ | |
1444 | int ustctl_reply_register_event(int sock, | |
1445 | uint32_t id, | |
1446 | int ret_code) | |
1447 | { | |
1448 | ssize_t len; | |
1449 | struct { | |
1450 | struct ustcomm_notify_hdr header; | |
1451 | struct ustcomm_notify_event_reply r; | |
1452 | } reply; | |
1453 | ||
1454 | memset(&reply, 0, sizeof(reply)); | |
1455 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1456 | reply.r.ret_code = ret_code; | |
1457 | reply.r.event_id = id; | |
1458 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1459 | if (len > 0 && len != sizeof(reply)) | |
1460 | return -EIO; | |
1461 | if (len < 0) | |
1462 | return len; | |
1463 | return 0; | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * Returns 0 on success, negative UST or system error value on error. | |
1468 | */ | |
1469 | int ustctl_recv_register_channel(int sock, | |
1470 | int *session_objd, /* session descriptor (output) */ | |
1471 | int *channel_objd, /* channel descriptor (output) */ | |
1472 | size_t *nr_fields, | |
1473 | struct ustctl_field **fields) | |
1474 | { | |
1475 | ssize_t len; | |
1476 | struct ustcomm_notify_channel_msg msg; | |
1477 | size_t fields_len; | |
1478 | struct ustctl_field *a_fields; | |
1479 | ||
1480 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1481 | if (len > 0 && len != sizeof(msg)) | |
1482 | return -EIO; | |
1483 | if (len == 0) | |
1484 | return -EPIPE; | |
1485 | if (len < 0) | |
1486 | return len; | |
1487 | ||
1488 | *session_objd = msg.session_objd; | |
1489 | *channel_objd = msg.channel_objd; | |
1490 | fields_len = msg.ctx_fields_len; | |
1491 | ||
1492 | if (fields_len % sizeof(*a_fields) != 0) { | |
1493 | return -EINVAL; | |
1494 | } | |
1495 | ||
1496 | /* recv fields */ | |
1497 | if (fields_len) { | |
1498 | a_fields = zmalloc(fields_len); | |
1499 | if (!a_fields) { | |
1500 | len = -ENOMEM; | |
1501 | goto alloc_error; | |
1502 | } | |
1503 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1504 | if (len > 0 && len != fields_len) { | |
1505 | len = -EIO; | |
1506 | goto fields_error; | |
1507 | } | |
1508 | if (len == 0) { | |
1509 | len = -EPIPE; | |
1510 | goto fields_error; | |
1511 | } | |
1512 | if (len < 0) { | |
1513 | goto fields_error; | |
1514 | } | |
1515 | *fields = a_fields; | |
1516 | } else { | |
1517 | *fields = NULL; | |
1518 | } | |
1519 | *nr_fields = fields_len / sizeof(*a_fields); | |
1520 | return 0; | |
1521 | ||
1522 | fields_error: | |
1523 | free(a_fields); | |
1524 | alloc_error: | |
1525 | return len; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * Returns 0 on success, negative error value on error. | |
1530 | */ | |
1531 | int ustctl_reply_register_channel(int sock, | |
1532 | uint32_t chan_id, | |
1533 | enum ustctl_channel_header header_type, | |
1534 | int ret_code) | |
1535 | { | |
1536 | ssize_t len; | |
1537 | struct { | |
1538 | struct ustcomm_notify_hdr header; | |
1539 | struct ustcomm_notify_channel_reply r; | |
1540 | } reply; | |
1541 | ||
1542 | memset(&reply, 0, sizeof(reply)); | |
1543 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1544 | reply.r.ret_code = ret_code; | |
1545 | reply.r.chan_id = chan_id; | |
1546 | switch (header_type) { | |
1547 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
1548 | reply.r.header_type = 1; | |
1549 | break; | |
1550 | case USTCTL_CHANNEL_HEADER_LARGE: | |
1551 | reply.r.header_type = 2; | |
1552 | break; | |
1553 | default: | |
1554 | reply.r.header_type = 0; | |
1555 | break; | |
1556 | } | |
1557 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1558 | if (len > 0 && len != sizeof(reply)) | |
1559 | return -EIO; | |
1560 | if (len < 0) | |
1561 | return len; | |
1562 | return 0; | |
1563 | } | |
1564 | ||
74d81a6c MD |
1565 | static __attribute__((constructor)) |
1566 | void ustctl_init(void) | |
1567 | { | |
1568 | init_usterr(); | |
1569 | lttng_ring_buffer_metadata_client_init(); | |
1570 | lttng_ring_buffer_client_overwrite_init(); | |
1571 | lttng_ring_buffer_client_discard_init(); | |
1572 | } | |
1573 | ||
1574 | static __attribute__((destructor)) | |
1575 | void ustctl_exit(void) | |
1576 | { | |
1577 | lttng_ring_buffer_client_discard_exit(); | |
1578 | lttng_ring_buffer_client_overwrite_exit(); | |
1579 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 1580 | } |