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; | |
ff0f5728 MD |
49 | int wait_fd; /* monitor close() */ |
50 | int wakeup_fd; /* monitor close() */ | |
74d81a6c MD |
51 | }; |
52 | ||
53 | /* | |
54 | * Stream representation within consumer. | |
55 | */ | |
56 | struct ustctl_consumer_stream { | |
57 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
58 | struct lttng_ust_lib_ring_buffer *buf; | |
59 | struct ustctl_consumer_channel *chan; | |
60 | int shm_fd, wait_fd, wakeup_fd; | |
61 | int cpu; | |
62 | uint64_t memory_map_size; | |
63 | }; | |
64 | ||
65 | extern void lttng_ring_buffer_client_overwrite_init(void); | |
66 | extern void lttng_ring_buffer_client_discard_init(void); | |
67 | extern void lttng_ring_buffer_metadata_client_init(void); | |
68 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
69 | extern void lttng_ring_buffer_client_discard_exit(void); | |
70 | extern void lttng_ring_buffer_metadata_client_exit(void); | |
71 | ||
72 | volatile enum ust_loglevel ust_loglevel; | |
57773204 | 73 | |
2be0e72c MD |
74 | int ustctl_release_handle(int sock, int handle) |
75 | { | |
76 | struct ustcomm_ust_msg lum; | |
77 | struct ustcomm_ust_reply lur; | |
2be0e72c | 78 | |
74d81a6c MD |
79 | if (sock < 0 || handle < 0) |
80 | return 0; | |
81 | memset(&lum, 0, sizeof(lum)); | |
82 | lum.handle = handle; | |
83 | lum.cmd = LTTNG_UST_RELEASE; | |
84 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 85 | } |
74d81a6c | 86 | |
12388166 MD |
87 | /* |
88 | * If sock is negative, it means we don't have to notify the other side | |
89 | * (e.g. application has already vanished). | |
90 | */ | |
d26228ae | 91 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 92 | { |
57773204 MD |
93 | int ret; |
94 | ||
9bfc503d MD |
95 | if (!data) |
96 | return -EINVAL; | |
97 | ||
74d81a6c MD |
98 | switch (data->type) { |
99 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
ff0f5728 MD |
100 | if (data->u.channel.wakeup_fd >= 0) { |
101 | ret = close(data->u.channel.wakeup_fd); | |
102 | if (ret < 0) { | |
103 | ret = -errno; | |
104 | return ret; | |
105 | } | |
106 | } | |
74d81a6c MD |
107 | free(data->u.channel.data); |
108 | break; | |
109 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
110 | if (data->u.stream.shm_fd >= 0) { | |
111 | ret = close(data->u.stream.shm_fd); | |
112 | if (ret < 0) { | |
113 | ret = -errno; | |
114 | return ret; | |
115 | } | |
d26228ae | 116 | } |
74d81a6c MD |
117 | if (data->u.stream.wakeup_fd >= 0) { |
118 | ret = close(data->u.stream.wakeup_fd); | |
119 | if (ret < 0) { | |
120 | ret = -errno; | |
121 | return ret; | |
122 | } | |
d26228ae | 123 | } |
74d81a6c | 124 | break; |
32ce8569 MD |
125 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
126 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
127 | break; | |
74d81a6c MD |
128 | default: |
129 | assert(0); | |
d26228ae | 130 | } |
2be0e72c | 131 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
132 | } |
133 | ||
1c5e467e MD |
134 | /* |
135 | * Send registration done packet to the application. | |
136 | */ | |
137 | int ustctl_register_done(int sock) | |
138 | { | |
139 | struct ustcomm_ust_msg lum; | |
140 | struct ustcomm_ust_reply lur; | |
141 | int ret; | |
142 | ||
143 | DBG("Sending register done command to %d", sock); | |
144 | memset(&lum, 0, sizeof(lum)); | |
145 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
146 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
147 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
148 | if (ret) | |
149 | return ret; | |
1c5e467e | 150 | return 0; |
1c5e467e MD |
151 | } |
152 | ||
57773204 MD |
153 | /* |
154 | * returns session handle. | |
155 | */ | |
156 | int ustctl_create_session(int sock) | |
157 | { | |
158 | struct ustcomm_ust_msg lum; | |
159 | struct ustcomm_ust_reply lur; | |
160 | int ret, session_handle; | |
161 | ||
162 | /* Create session */ | |
163 | memset(&lum, 0, sizeof(lum)); | |
164 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
165 | lum.cmd = LTTNG_UST_SESSION; | |
166 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
167 | if (ret) | |
168 | return ret; | |
169 | session_handle = lur.ret_val; | |
170 | DBG("received session handle %u", session_handle); | |
171 | return session_handle; | |
172 | } | |
173 | ||
57773204 | 174 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
175 | struct lttng_ust_object_data *channel_data, |
176 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
177 | { |
178 | struct ustcomm_ust_msg lum; | |
179 | struct ustcomm_ust_reply lur; | |
61f02aea | 180 | struct lttng_ust_object_data *event_data; |
57773204 MD |
181 | int ret; |
182 | ||
9bfc503d MD |
183 | if (!channel_data || !_event_data) |
184 | return -EINVAL; | |
185 | ||
74d81a6c | 186 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
187 | if (!event_data) |
188 | return -ENOMEM; | |
32ce8569 | 189 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
190 | memset(&lum, 0, sizeof(lum)); |
191 | lum.handle = channel_data->handle; | |
192 | lum.cmd = LTTNG_UST_EVENT; | |
193 | strncpy(lum.u.event.name, ev->name, | |
194 | LTTNG_UST_SYM_NAME_LEN); | |
195 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
196 | lum.u.event.loglevel_type = ev->loglevel_type; |
197 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
198 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
199 | if (ret) { | |
200 | free(event_data); | |
201 | return ret; | |
202 | } | |
203 | event_data->handle = lur.ret_val; | |
204 | DBG("received event handle %u", event_data->handle); | |
205 | *_event_data = event_data; | |
206 | return 0; | |
207 | } | |
208 | ||
209 | int ustctl_add_context(int sock, struct lttng_ust_context *ctx, | |
61f02aea MD |
210 | struct lttng_ust_object_data *obj_data, |
211 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
212 | { |
213 | struct ustcomm_ust_msg lum; | |
214 | struct ustcomm_ust_reply lur; | |
61f02aea | 215 | struct lttng_ust_object_data *context_data; |
57773204 MD |
216 | int ret; |
217 | ||
9bfc503d MD |
218 | if (!obj_data || !_context_data) |
219 | return -EINVAL; | |
220 | ||
74d81a6c | 221 | context_data = zmalloc(sizeof(*context_data)); |
57773204 MD |
222 | if (!context_data) |
223 | return -ENOMEM; | |
32ce8569 | 224 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 225 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 226 | lum.handle = obj_data->handle; |
57773204 MD |
227 | lum.cmd = LTTNG_UST_CONTEXT; |
228 | lum.u.context.ctx = ctx->ctx; | |
229 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
230 | if (ret) { | |
231 | free(context_data); | |
232 | return ret; | |
233 | } | |
32ce8569 MD |
234 | context_data->handle = -1; |
235 | DBG("Context created successfully"); | |
57773204 MD |
236 | *_context_data = context_data; |
237 | return ret; | |
238 | } | |
239 | ||
cd54f6d9 MD |
240 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
241 | struct lttng_ust_object_data *obj_data) | |
242 | { | |
243 | struct ustcomm_ust_msg lum; | |
244 | struct ustcomm_ust_reply lur; | |
245 | int ret; | |
246 | ||
247 | if (!obj_data) | |
248 | return -EINVAL; | |
249 | ||
250 | memset(&lum, 0, sizeof(lum)); | |
251 | lum.handle = obj_data->handle; | |
252 | lum.cmd = LTTNG_UST_FILTER; | |
253 | lum.u.filter.data_size = bytecode->len; | |
254 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 255 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
256 | |
257 | ret = ustcomm_send_app_msg(sock, &lum); | |
258 | if (ret) | |
259 | return ret; | |
cd54f6d9 MD |
260 | /* send var len bytecode */ |
261 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
262 | bytecode->len); | |
263 | if (ret < 0) { | |
264 | return ret; | |
265 | } | |
7bc53e94 MD |
266 | if (ret != bytecode->len) |
267 | return -EINVAL; | |
268 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
269 | } |
270 | ||
57773204 | 271 | /* Enable event, channel and session ioctl */ |
61f02aea | 272 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
273 | { |
274 | struct ustcomm_ust_msg lum; | |
275 | struct ustcomm_ust_reply lur; | |
276 | int ret; | |
277 | ||
9bfc503d MD |
278 | if (!object) |
279 | return -EINVAL; | |
280 | ||
57773204 MD |
281 | memset(&lum, 0, sizeof(lum)); |
282 | lum.handle = object->handle; | |
283 | lum.cmd = LTTNG_UST_ENABLE; | |
284 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
285 | if (ret) | |
286 | return ret; | |
287 | DBG("enabled handle %u", object->handle); | |
288 | return 0; | |
289 | } | |
290 | ||
291 | /* Disable event, channel and session ioctl */ | |
61f02aea | 292 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
293 | { |
294 | struct ustcomm_ust_msg lum; | |
295 | struct ustcomm_ust_reply lur; | |
296 | int ret; | |
297 | ||
9bfc503d MD |
298 | if (!object) |
299 | return -EINVAL; | |
300 | ||
57773204 MD |
301 | memset(&lum, 0, sizeof(lum)); |
302 | lum.handle = object->handle; | |
303 | lum.cmd = LTTNG_UST_DISABLE; | |
304 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
305 | if (ret) | |
306 | return ret; | |
307 | DBG("disable handle %u", object->handle); | |
308 | return 0; | |
309 | } | |
310 | ||
4a6ca058 | 311 | int ustctl_start_session(int sock, int handle) |
57773204 | 312 | { |
61f02aea | 313 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
314 | |
315 | obj.handle = handle; | |
316 | return ustctl_enable(sock, &obj); | |
57773204 MD |
317 | } |
318 | ||
4a6ca058 | 319 | int ustctl_stop_session(int sock, int handle) |
57773204 | 320 | { |
61f02aea | 321 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
322 | |
323 | obj.handle = handle; | |
324 | return ustctl_disable(sock, &obj); | |
57773204 MD |
325 | } |
326 | ||
57773204 MD |
327 | int ustctl_tracepoint_list(int sock) |
328 | { | |
b115631f MD |
329 | struct ustcomm_ust_msg lum; |
330 | struct ustcomm_ust_reply lur; | |
331 | int ret, tp_list_handle; | |
332 | ||
333 | memset(&lum, 0, sizeof(lum)); | |
334 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
335 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
336 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
337 | if (ret) | |
338 | return ret; | |
339 | tp_list_handle = lur.ret_val; | |
340 | DBG("received tracepoint list handle %u", tp_list_handle); | |
341 | return tp_list_handle; | |
342 | } | |
343 | ||
344 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 345 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
346 | { |
347 | struct ustcomm_ust_msg lum; | |
348 | struct ustcomm_ust_reply lur; | |
349 | int ret; | |
350 | ||
9bfc503d MD |
351 | if (!iter) |
352 | return -EINVAL; | |
353 | ||
b115631f MD |
354 | memset(&lum, 0, sizeof(lum)); |
355 | lum.handle = tp_list_handle; | |
356 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
357 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
358 | if (ret) | |
359 | return ret; | |
882a56d7 | 360 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 361 | lur.u.tracepoint.name, |
882a56d7 | 362 | lur.u.tracepoint.loglevel); |
cbef6901 | 363 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 364 | return 0; |
57773204 MD |
365 | } |
366 | ||
40003310 MD |
367 | int ustctl_tracepoint_field_list(int sock) |
368 | { | |
369 | struct ustcomm_ust_msg lum; | |
370 | struct ustcomm_ust_reply lur; | |
371 | int ret, tp_field_list_handle; | |
372 | ||
373 | memset(&lum, 0, sizeof(lum)); | |
374 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
375 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
376 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
377 | if (ret) | |
378 | return ret; | |
379 | tp_field_list_handle = lur.ret_val; | |
380 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
381 | return tp_field_list_handle; | |
382 | } | |
383 | ||
384 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
385 | struct lttng_ust_field_iter *iter) | |
386 | { | |
387 | struct ustcomm_ust_msg lum; | |
388 | struct ustcomm_ust_reply lur; | |
389 | int ret; | |
390 | ssize_t len; | |
391 | ||
392 | if (!iter) | |
393 | return -EINVAL; | |
394 | ||
395 | memset(&lum, 0, sizeof(lum)); | |
396 | lum.handle = tp_field_list_handle; | |
397 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
398 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
399 | if (ret) | |
400 | return ret; | |
401 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
402 | if (len != sizeof(*iter)) { | |
403 | return -EINVAL; | |
404 | } | |
405 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
406 | iter->event_name, | |
407 | iter->loglevel, | |
408 | iter->field_name, | |
409 | iter->type); | |
410 | return 0; | |
411 | } | |
412 | ||
57773204 MD |
413 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
414 | { | |
415 | struct ustcomm_ust_msg lum; | |
416 | struct ustcomm_ust_reply lur; | |
417 | int ret; | |
418 | ||
9bfc503d MD |
419 | if (!v) |
420 | return -EINVAL; | |
421 | ||
57773204 MD |
422 | memset(&lum, 0, sizeof(lum)); |
423 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
424 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
425 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
426 | if (ret) | |
427 | return ret; | |
428 | memcpy(v, &lur.u.version, sizeof(*v)); | |
429 | DBG("received tracer version"); | |
430 | return 0; | |
431 | } | |
432 | ||
433 | int ustctl_wait_quiescent(int sock) | |
434 | { | |
435 | struct ustcomm_ust_msg lum; | |
436 | struct ustcomm_ust_reply lur; | |
437 | int ret; | |
438 | ||
439 | memset(&lum, 0, sizeof(lum)); | |
440 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
441 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
442 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
443 | if (ret) | |
444 | return ret; | |
445 | DBG("waited for quiescent state"); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
450 | { | |
9bfc503d MD |
451 | if (!calibrate) |
452 | return -EINVAL; | |
453 | ||
57773204 MD |
454 | return -ENOSYS; |
455 | } | |
456 | ||
f1fffc57 MD |
457 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
458 | { | |
459 | struct ustcomm_ust_msg lum; | |
460 | struct ustcomm_ust_reply lur; | |
461 | int ret; | |
462 | ||
9bfc503d MD |
463 | if (!object) |
464 | return -EINVAL; | |
465 | ||
f1fffc57 MD |
466 | memset(&lum, 0, sizeof(lum)); |
467 | lum.handle = object->handle; | |
468 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
469 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
470 | if (ret) | |
471 | return ret; | |
472 | DBG("flushed buffer handle %u", object->handle); | |
473 | return 0; | |
474 | } | |
475 | ||
74d81a6c MD |
476 | static |
477 | int ustctl_send_channel(int sock, | |
478 | enum lttng_ust_chan_type type, | |
479 | void *data, | |
480 | uint64_t size, | |
ff0f5728 | 481 | int wakeup_fd, |
74d81a6c MD |
482 | int send_fd_only) |
483 | { | |
484 | ssize_t len; | |
485 | ||
486 | if (!send_fd_only) { | |
487 | /* Send mmap size */ | |
488 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
489 | if (len != sizeof(size)) { | |
490 | if (len < 0) | |
491 | return len; | |
492 | else | |
493 | return -EIO; | |
494 | } | |
495 | ||
496 | /* Send channel type */ | |
497 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
498 | if (len != sizeof(type)) { | |
499 | if (len < 0) | |
500 | return len; | |
501 | else | |
502 | return -EIO; | |
503 | } | |
504 | } | |
505 | ||
506 | /* Send channel data */ | |
507 | len = ustcomm_send_unix_sock(sock, data, size); | |
508 | if (len != size) { | |
509 | if (len < 0) | |
510 | return len; | |
511 | else | |
512 | return -EIO; | |
513 | } | |
57773204 | 514 | |
ff0f5728 MD |
515 | /* Send wakeup fd */ |
516 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
517 | if (len <= 0) { | |
518 | if (len < 0) | |
519 | return len; | |
520 | else | |
521 | return -EIO; | |
522 | } | |
74d81a6c MD |
523 | return 0; |
524 | } | |
525 | ||
526 | static | |
527 | int ustctl_send_stream(int sock, | |
528 | uint32_t stream_nr, | |
529 | uint64_t memory_map_size, | |
530 | int shm_fd, int wakeup_fd, | |
531 | int send_fd_only) | |
57773204 | 532 | { |
74d81a6c MD |
533 | ssize_t len; |
534 | int fds[2]; | |
535 | ||
536 | if (!send_fd_only) { | |
537 | if (shm_fd < 0) { | |
538 | /* finish iteration */ | |
539 | uint64_t v = -1; | |
540 | ||
541 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
542 | if (len != sizeof(v)) { | |
543 | if (len < 0) | |
544 | return len; | |
545 | else | |
546 | return -EIO; | |
547 | } | |
548 | return 0; | |
549 | } | |
550 | ||
551 | /* Send mmap size */ | |
552 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
553 | sizeof(memory_map_size)); | |
554 | if (len != sizeof(memory_map_size)) { | |
555 | if (len < 0) | |
556 | return len; | |
557 | else | |
558 | return -EIO; | |
559 | } | |
560 | ||
561 | /* Send stream nr */ | |
562 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
563 | sizeof(stream_nr)); | |
564 | if (len != sizeof(stream_nr)) { | |
565 | if (len < 0) | |
566 | return len; | |
567 | else | |
568 | return -EIO; | |
569 | } | |
570 | } | |
571 | ||
572 | /* Send shm fd and wakeup fd */ | |
573 | fds[0] = shm_fd; | |
574 | fds[1] = wakeup_fd; | |
575 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
576 | if (len <= 0) { | |
577 | if (len < 0) | |
578 | return len; | |
579 | else | |
580 | return -EIO; | |
581 | } | |
582 | return 0; | |
583 | } | |
584 | ||
585 | int ustctl_recv_channel_from_consumer(int sock, | |
586 | struct lttng_ust_object_data **_channel_data) | |
587 | { | |
588 | struct lttng_ust_object_data *channel_data; | |
589 | ssize_t len; | |
ff0f5728 | 590 | int wakeup_fd; |
7a784989 | 591 | int ret; |
57773204 | 592 | |
74d81a6c MD |
593 | channel_data = zmalloc(sizeof(*channel_data)); |
594 | if (!channel_data) { | |
595 | ret = -ENOMEM; | |
596 | goto error_alloc; | |
597 | } | |
598 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
12f3dabc | 599 | channel_data->handle = -1; |
74d81a6c MD |
600 | |
601 | /* recv mmap size */ | |
602 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
603 | sizeof(channel_data->size)); | |
604 | if (len != sizeof(channel_data->size)) { | |
605 | if (len < 0) | |
606 | ret = len; | |
607 | else | |
608 | ret = -EINVAL; | |
609 | goto error; | |
610 | } | |
9bfc503d | 611 | |
74d81a6c MD |
612 | /* recv channel type */ |
613 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
614 | sizeof(channel_data->u.channel.type)); | |
615 | if (len != sizeof(channel_data->u.channel.type)) { | |
616 | if (len < 0) | |
617 | ret = len; | |
618 | else | |
619 | ret = -EINVAL; | |
620 | goto error; | |
621 | } | |
622 | ||
623 | /* recv channel data */ | |
624 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
625 | if (!channel_data->u.channel.data) { | |
626 | ret = -ENOMEM; | |
627 | goto error; | |
628 | } | |
629 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
630 | channel_data->size); | |
631 | if (len != channel_data->size) { | |
632 | if (len < 0) | |
633 | ret = len; | |
634 | else | |
635 | ret = -EINVAL; | |
636 | goto error_recv_data; | |
637 | } | |
ff0f5728 MD |
638 | /* recv wakeup fd */ |
639 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
640 | if (len <= 0) { | |
641 | if (len < 0) { | |
642 | ret = len; | |
643 | goto error_recv_data; | |
644 | } else { | |
645 | ret = -EIO; | |
646 | goto error_recv_data; | |
647 | } | |
648 | } | |
649 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
650 | *_channel_data = channel_data; |
651 | return 0; | |
652 | ||
653 | error_recv_data: | |
654 | free(channel_data->u.channel.data); | |
655 | error: | |
656 | free(channel_data); | |
657 | error_alloc: | |
658 | return ret; | |
659 | } | |
660 | ||
661 | int ustctl_recv_stream_from_consumer(int sock, | |
662 | struct lttng_ust_object_data **_stream_data) | |
663 | { | |
664 | struct lttng_ust_object_data *stream_data; | |
665 | ssize_t len; | |
666 | int ret; | |
667 | int fds[2]; | |
668 | ||
669 | stream_data = zmalloc(sizeof(*stream_data)); | |
670 | if (!stream_data) { | |
671 | ret = -ENOMEM; | |
672 | goto error_alloc; | |
57773204 | 673 | } |
74d81a6c MD |
674 | |
675 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
676 | stream_data->handle = -1; | |
677 | ||
678 | /* recv mmap size */ | |
679 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
680 | sizeof(stream_data->size)); | |
681 | if (len != sizeof(stream_data->size)) { | |
682 | if (len < 0) | |
683 | ret = len; | |
684 | else | |
685 | ret = -EINVAL; | |
686 | goto error; | |
687 | } | |
688 | if (stream_data->size == -1) { | |
689 | ret = -LTTNG_UST_ERR_NOENT; | |
690 | goto error; | |
691 | } | |
692 | ||
693 | /* recv stream nr */ | |
694 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
695 | sizeof(stream_data->u.stream.stream_nr)); | |
696 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
697 | if (len < 0) | |
698 | ret = len; | |
699 | else | |
700 | ret = -EINVAL; | |
701 | goto error; | |
702 | } | |
703 | ||
704 | /* recv shm fd and wakeup fd */ | |
705 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
706 | if (len <= 0) { | |
707 | if (len < 0) { | |
708 | ret = len; | |
709 | goto error; | |
710 | } else { | |
711 | ret = -EIO; | |
712 | goto error; | |
0bfe09ec | 713 | } |
0bfe09ec | 714 | } |
74d81a6c MD |
715 | stream_data->u.stream.shm_fd = fds[0]; |
716 | stream_data->u.stream.wakeup_fd = fds[1]; | |
717 | *_stream_data = stream_data; | |
718 | return 0; | |
0bfe09ec | 719 | |
74d81a6c MD |
720 | error: |
721 | free(stream_data); | |
722 | error_alloc: | |
723 | return ret; | |
724 | } | |
725 | ||
726 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
727 | struct lttng_ust_object_data *channel_data) | |
728 | { | |
729 | struct ustcomm_ust_msg lum; | |
730 | struct ustcomm_ust_reply lur; | |
731 | int ret; | |
732 | ||
733 | if (!channel_data) | |
734 | return -EINVAL; | |
735 | ||
736 | memset(&lum, 0, sizeof(lum)); | |
737 | lum.handle = session_handle; | |
738 | lum.cmd = LTTNG_UST_CHANNEL; | |
739 | lum.u.channel.len = channel_data->size; | |
740 | lum.u.channel.type = channel_data->u.channel.type; | |
741 | ret = ustcomm_send_app_msg(sock, &lum); | |
742 | if (ret) | |
743 | return ret; | |
744 | ||
745 | ret = ustctl_send_channel(sock, | |
746 | channel_data->u.channel.type, | |
747 | channel_data->u.channel.data, | |
748 | channel_data->size, | |
ff0f5728 | 749 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
750 | 1); |
751 | if (ret) | |
752 | return ret; | |
753 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
754 | if (!ret) { | |
755 | if (lur.ret_val >= 0) { | |
756 | channel_data->handle = lur.ret_val; | |
757 | } | |
57773204 | 758 | } |
74d81a6c MD |
759 | return ret; |
760 | } | |
761 | ||
762 | int ustctl_send_stream_to_ust(int sock, | |
763 | struct lttng_ust_object_data *channel_data, | |
764 | struct lttng_ust_object_data *stream_data) | |
765 | { | |
766 | struct ustcomm_ust_msg lum; | |
767 | struct ustcomm_ust_reply lur; | |
768 | int ret; | |
769 | ||
770 | memset(&lum, 0, sizeof(lum)); | |
771 | lum.handle = channel_data->handle; | |
772 | lum.cmd = LTTNG_UST_STREAM; | |
773 | lum.u.stream.len = stream_data->size; | |
774 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
775 | ret = ustcomm_send_app_msg(sock, &lum); | |
776 | if (ret) | |
777 | return ret; | |
778 | ||
779 | assert(stream_data); | |
780 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
781 | ||
782 | ret = ustctl_send_stream(sock, | |
783 | stream_data->u.stream.stream_nr, | |
784 | stream_data->size, | |
785 | stream_data->u.stream.shm_fd, | |
786 | stream_data->u.stream.wakeup_fd, 1); | |
787 | if (ret) | |
788 | return ret; | |
789 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
790 | } | |
791 | ||
12f3dabc MD |
792 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, |
793 | struct lttng_ust_object_data *src) | |
794 | { | |
795 | struct lttng_ust_object_data *obj; | |
796 | int ret; | |
797 | ||
798 | if (src->handle != -1) { | |
799 | ret = -EINVAL; | |
800 | goto error; | |
801 | } | |
802 | ||
803 | obj = zmalloc(sizeof(*obj)); | |
804 | if (!obj) { | |
805 | ret = -ENOMEM; | |
806 | goto error; | |
807 | } | |
808 | ||
809 | obj->type = src->type; | |
810 | obj->handle = src->handle; | |
811 | obj->size = src->size; | |
812 | ||
813 | switch (obj->type) { | |
814 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
815 | { | |
816 | obj->u.channel.type = src->u.channel.type; | |
817 | if (src->u.channel.wakeup_fd >= 0) { | |
818 | obj->u.channel.wakeup_fd = | |
819 | dup(src->u.channel.wakeup_fd); | |
820 | if (obj->u.channel.wakeup_fd < 0) { | |
821 | ret = errno; | |
822 | goto chan_error_wakeup_fd; | |
823 | } | |
824 | } else { | |
825 | obj->u.channel.wakeup_fd = | |
826 | src->u.channel.wakeup_fd; | |
827 | } | |
828 | obj->u.channel.data = zmalloc(obj->size); | |
829 | if (!obj->u.channel.data) { | |
830 | ret = -ENOMEM; | |
831 | goto chan_error_alloc; | |
832 | } | |
833 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
834 | break; | |
835 | ||
836 | chan_error_alloc: | |
837 | if (src->u.channel.wakeup_fd >= 0) { | |
838 | int closeret; | |
839 | ||
840 | closeret = close(obj->u.channel.wakeup_fd); | |
841 | if (closeret) { | |
842 | PERROR("close"); | |
843 | } | |
844 | } | |
845 | chan_error_wakeup_fd: | |
846 | goto error_type; | |
847 | ||
848 | } | |
849 | ||
850 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
851 | { | |
852 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
853 | if (src->u.stream.wakeup_fd >= 0) { | |
854 | obj->u.stream.wakeup_fd = | |
855 | dup(src->u.stream.wakeup_fd); | |
856 | if (obj->u.stream.wakeup_fd < 0) { | |
857 | ret = errno; | |
858 | goto stream_error_wakeup_fd; | |
859 | } | |
860 | } else { | |
861 | obj->u.stream.wakeup_fd = | |
862 | src->u.stream.wakeup_fd; | |
863 | } | |
864 | ||
865 | if (src->u.stream.shm_fd >= 0) { | |
866 | obj->u.stream.shm_fd = | |
867 | dup(src->u.stream.shm_fd); | |
868 | if (obj->u.stream.shm_fd < 0) { | |
869 | ret = errno; | |
870 | goto stream_error_shm_fd; | |
871 | } | |
872 | } else { | |
873 | obj->u.stream.shm_fd = | |
874 | src->u.stream.shm_fd; | |
875 | } | |
876 | break; | |
877 | ||
878 | stream_error_shm_fd: | |
879 | if (src->u.stream.wakeup_fd >= 0) { | |
880 | int closeret; | |
881 | ||
882 | closeret = close(obj->u.stream.wakeup_fd); | |
883 | if (closeret) { | |
884 | PERROR("close"); | |
885 | } | |
886 | } | |
887 | stream_error_wakeup_fd: | |
888 | goto error_type; | |
889 | } | |
890 | ||
891 | default: | |
892 | ret = -EINVAL; | |
893 | goto error_type; | |
894 | } | |
895 | ||
896 | *dest = obj; | |
897 | return 0; | |
898 | ||
899 | error_type: | |
900 | free(obj); | |
901 | error: | |
902 | return ret; | |
903 | } | |
904 | ||
74d81a6c MD |
905 | |
906 | /* Buffer operations */ | |
907 | ||
908 | struct ustctl_consumer_channel * | |
909 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr) | |
910 | { | |
911 | struct ustctl_consumer_channel *chan; | |
912 | const char *transport_name; | |
913 | struct lttng_transport *transport; | |
914 | ||
915 | switch (attr->type) { | |
916 | case LTTNG_UST_CHAN_PER_CPU: | |
917 | if (attr->output == LTTNG_UST_MMAP) { | |
918 | transport_name = attr->overwrite ? | |
919 | "relay-overwrite-mmap" : "relay-discard-mmap"; | |
920 | } else { | |
921 | return NULL; | |
922 | } | |
c1fca457 | 923 | break; |
74d81a6c MD |
924 | case LTTNG_UST_CHAN_METADATA: |
925 | if (attr->output == LTTNG_UST_MMAP) | |
926 | transport_name = "relay-metadata-mmap"; | |
927 | else | |
928 | return NULL; | |
c1fca457 MD |
929 | break; |
930 | default: | |
74d81a6c | 931 | transport_name = "<unknown>"; |
c1fca457 MD |
932 | return NULL; |
933 | } | |
74d81a6c MD |
934 | |
935 | transport = lttng_transport_find(transport_name); | |
936 | if (!transport) { | |
937 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 938 | transport_name); |
74d81a6c | 939 | return NULL; |
7a784989 | 940 | } |
74d81a6c MD |
941 | |
942 | chan = zmalloc(sizeof(*chan)); | |
943 | if (!chan) | |
944 | return NULL; | |
945 | ||
946 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 947 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 948 | attr->switch_timer_interval, |
32ce8569 | 949 | attr->read_timer_interval, |
74d81a6c MD |
950 | attr->uuid); |
951 | if (!chan->chan) { | |
952 | goto chan_error; | |
953 | } | |
954 | chan->chan->ops = &transport->ops; | |
955 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
cb7378b3 MD |
956 | chan->wait_fd = ustctl_channel_get_wait_fd(chan); |
957 | chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
958 | return chan; |
959 | ||
960 | chan_error: | |
961 | free(chan); | |
962 | return NULL; | |
57773204 MD |
963 | } |
964 | ||
74d81a6c | 965 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 966 | { |
74d81a6c MD |
967 | chan->chan->ops->channel_destroy(chan->chan); |
968 | free(chan); | |
969 | } | |
970 | ||
971 | int ustctl_send_channel_to_sessiond(int sock, | |
972 | struct ustctl_consumer_channel *channel) | |
973 | { | |
974 | struct shm_object_table *table; | |
57773204 | 975 | |
74d81a6c MD |
976 | table = channel->chan->handle->table; |
977 | if (table->size <= 0) | |
9bfc503d | 978 | return -EINVAL; |
74d81a6c MD |
979 | return ustctl_send_channel(sock, |
980 | channel->attr.type, | |
981 | table->objects[0].memory_map, | |
982 | table->objects[0].memory_map_size, | |
ff0f5728 | 983 | channel->wakeup_fd, |
74d81a6c MD |
984 | 0); |
985 | } | |
9bfc503d | 986 | |
74d81a6c MD |
987 | int ustctl_send_stream_to_sessiond(int sock, |
988 | struct ustctl_consumer_stream *stream) | |
989 | { | |
990 | if (!stream) | |
991 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
992 | ||
993 | return ustctl_send_stream(sock, | |
994 | stream->cpu, | |
995 | stream->memory_map_size, | |
996 | stream->shm_fd, stream->wakeup_fd, | |
997 | 0); | |
57773204 MD |
998 | } |
999 | ||
c9023c93 MD |
1000 | int ustctl_write_metadata_to_channel( |
1001 | struct ustctl_consumer_channel *channel, | |
1002 | const char *metadata_str, /* NOT null-terminated */ | |
1003 | size_t len) /* metadata length */ | |
1004 | { | |
1005 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1006 | struct lttng_channel *chan = channel->chan; | |
1007 | const char *str = metadata_str; | |
1008 | int ret = 0, waitret; | |
1009 | size_t reserve_len, pos; | |
1010 | ||
1011 | for (pos = 0; pos < len; pos += reserve_len) { | |
1012 | reserve_len = min_t(size_t, | |
1013 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1014 | len - pos); | |
1015 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
1016 | sizeof(char), -1, chan->handle); | |
1017 | /* | |
1018 | * We don't care about metadata buffer's records lost | |
1019 | * count, because we always retry here. Report error if | |
1020 | * we need to bail out after timeout or being | |
1021 | * interrupted. | |
1022 | */ | |
1023 | waitret = wait_cond_interruptible_timeout( | |
1024 | ({ | |
1025 | ret = chan->ops->event_reserve(&ctx, 0); | |
1026 | ret != -ENOBUFS || !ret; | |
1027 | }), | |
1028 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1029 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1030 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1031 | waitret == -EINTR ? "interrupted" : | |
1032 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1033 | if (waitret == -EINTR) | |
1034 | ret = waitret; | |
1035 | goto end; | |
1036 | } | |
1037 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
1038 | chan->ops->event_commit(&ctx); | |
1039 | } | |
1040 | end: | |
1041 | return ret; | |
1042 | } | |
1043 | ||
ff0f5728 MD |
1044 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan) |
1045 | { | |
1046 | struct channel *chan; | |
cb7378b3 | 1047 | int ret; |
ff0f5728 MD |
1048 | |
1049 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1050 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
ff0f5728 | 1051 | chan, chan->handle); |
cb7378b3 MD |
1052 | if (!ret) |
1053 | consumer_chan->wait_fd = -1; | |
1054 | return ret; | |
ff0f5728 MD |
1055 | } |
1056 | ||
1057 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan) | |
1058 | { | |
1059 | struct channel *chan; | |
cb7378b3 | 1060 | int ret; |
ff0f5728 MD |
1061 | |
1062 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1063 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1064 | chan, chan->handle); |
cb7378b3 MD |
1065 | if (!ret) |
1066 | consumer_chan->wakeup_fd = -1; | |
1067 | return ret; | |
ff0f5728 MD |
1068 | } |
1069 | ||
74d81a6c | 1070 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
1071 | { |
1072 | struct channel *chan; | |
1073 | ||
74d81a6c | 1074 | chan = stream->chan->chan->chan; |
ff0f5728 | 1075 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
74d81a6c | 1076 | chan, stream->handle, stream->cpu); |
5224b5c8 MD |
1077 | } |
1078 | ||
74d81a6c | 1079 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 1080 | { |
66bdd22a | 1081 | struct channel *chan; |
74d81a6c MD |
1082 | |
1083 | chan = stream->chan->chan->chan; | |
ff0f5728 | 1084 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
74d81a6c MD |
1085 | chan, stream->handle, stream->cpu); |
1086 | } | |
1087 | ||
1088 | struct ustctl_consumer_stream * | |
1089 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
1090 | int cpu) | |
1091 | { | |
1092 | struct ustctl_consumer_stream *stream; | |
1093 | struct lttng_ust_shm_handle *handle; | |
1094 | struct channel *chan; | |
1095 | int shm_fd, wait_fd, wakeup_fd; | |
1096 | uint64_t memory_map_size; | |
4cfec15c | 1097 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
1098 | int ret; |
1099 | ||
74d81a6c MD |
1100 | if (!channel) |
1101 | return NULL; | |
1102 | handle = channel->chan->handle; | |
9bfc503d MD |
1103 | if (!handle) |
1104 | return NULL; | |
1105 | ||
74d81a6c | 1106 | chan = channel->chan->chan; |
6e922b24 | 1107 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
1108 | chan, cpu, handle, &shm_fd, &wait_fd, |
1109 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
1110 | if (!buf) |
1111 | return NULL; | |
74d81a6c | 1112 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1113 | if (ret) |
1114 | return NULL; | |
74d81a6c MD |
1115 | |
1116 | stream = zmalloc(sizeof(*stream)); | |
1117 | if (!stream) | |
1118 | goto alloc_error; | |
1119 | stream->handle = handle; | |
1120 | stream->buf = buf; | |
1121 | stream->chan = channel; | |
1122 | stream->shm_fd = shm_fd; | |
1123 | stream->wait_fd = wait_fd; | |
1124 | stream->wakeup_fd = wakeup_fd; | |
1125 | stream->memory_map_size = memory_map_size; | |
1126 | stream->cpu = cpu; | |
1127 | return stream; | |
1128 | ||
1129 | alloc_error: | |
1130 | return NULL; | |
1131 | } | |
1132 | ||
1133 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
1134 | { | |
1135 | struct lttng_ust_lib_ring_buffer *buf; | |
1136 | struct ustctl_consumer_channel *consumer_chan; | |
1137 | ||
1138 | assert(stream); | |
1139 | buf = stream->buf; | |
1140 | consumer_chan = stream->chan; | |
1141 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); | |
1142 | free(stream); | |
6e922b24 MD |
1143 | } |
1144 | ||
ff0f5728 MD |
1145 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan) |
1146 | { | |
1147 | if (!chan) | |
1148 | return -EINVAL; | |
1149 | return shm_get_wait_fd(chan->chan->handle, | |
1150 | &chan->chan->handle->chan._ref); | |
1151 | } | |
1152 | ||
1153 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan) | |
1154 | { | |
1155 | if (!chan) | |
1156 | return -EINVAL; | |
1157 | return shm_get_wakeup_fd(chan->chan->handle, | |
1158 | &chan->chan->handle->chan._ref); | |
1159 | } | |
1160 | ||
1161 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream) | |
6e922b24 | 1162 | { |
74d81a6c MD |
1163 | struct lttng_ust_lib_ring_buffer *buf; |
1164 | struct ustctl_consumer_channel *consumer_chan; | |
1165 | ||
1166 | if (!stream) | |
1167 | return -EINVAL; | |
1168 | buf = stream->buf; | |
1169 | consumer_chan = stream->chan; | |
1170 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
1171 | } | |
1172 | ||
ff0f5728 | 1173 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
74d81a6c MD |
1174 | { |
1175 | struct lttng_ust_lib_ring_buffer *buf; | |
1176 | struct ustctl_consumer_channel *consumer_chan; | |
1177 | ||
1178 | if (!stream) | |
1179 | return -EINVAL; | |
1180 | buf = stream->buf; | |
1181 | consumer_chan = stream->chan; | |
1182 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
1183 | } |
1184 | ||
57773204 MD |
1185 | /* For mmap mode, readable without "get" operation */ |
1186 | ||
74d81a6c | 1187 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 1188 | { |
74d81a6c MD |
1189 | struct lttng_ust_lib_ring_buffer *buf; |
1190 | struct ustctl_consumer_channel *consumer_chan; | |
1191 | ||
1192 | if (!stream) | |
9bfc503d | 1193 | return NULL; |
74d81a6c MD |
1194 | buf = stream->buf; |
1195 | consumer_chan = stream->chan; | |
1196 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1197 | } |
1198 | ||
57773204 | 1199 | /* returns the length to mmap. */ |
74d81a6c | 1200 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1201 | unsigned long *len) |
1202 | { | |
74d81a6c | 1203 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1204 | unsigned long mmap_buf_len; |
66bdd22a | 1205 | struct channel *chan; |
57773204 | 1206 | |
74d81a6c | 1207 | if (!stream) |
9bfc503d | 1208 | return -EINVAL; |
74d81a6c MD |
1209 | consumer_chan = stream->chan; |
1210 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1211 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1212 | return -EINVAL; | |
1213 | mmap_buf_len = chan->backend.buf_size; | |
1214 | if (chan->backend.extra_reader_sb) | |
1215 | mmap_buf_len += chan->backend.subbuf_size; | |
1216 | if (mmap_buf_len > INT_MAX) | |
1217 | return -EFBIG; | |
1218 | *len = mmap_buf_len; | |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1223 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1224 | unsigned long *len) |
1225 | { | |
74d81a6c | 1226 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1227 | struct channel *chan; |
57773204 | 1228 | |
74d81a6c | 1229 | if (!stream) |
9bfc503d | 1230 | return -EINVAL; |
74d81a6c MD |
1231 | consumer_chan = stream->chan; |
1232 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1233 | *len = chan->backend.subbuf_size; |
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * For mmap mode, operate on the current packet (between get/put or | |
1239 | * get_next/put_next). | |
1240 | */ | |
1241 | ||
1242 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1243 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1244 | unsigned long *off) | |
57773204 | 1245 | { |
66bdd22a | 1246 | struct channel *chan; |
57773204 | 1247 | unsigned long sb_bindex; |
74d81a6c MD |
1248 | struct lttng_ust_lib_ring_buffer *buf; |
1249 | struct ustctl_consumer_channel *consumer_chan; | |
57773204 | 1250 | |
74d81a6c | 1251 | if (!stream) |
9bfc503d | 1252 | return -EINVAL; |
74d81a6c MD |
1253 | buf = stream->buf; |
1254 | consumer_chan = stream->chan; | |
1255 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1256 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1257 | return -EINVAL; | |
1258 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1259 | buf->backend.buf_rsb.id); |
74d81a6c MD |
1260 | *off = shmp(consumer_chan->chan->handle, |
1261 | shmp_index(consumer_chan->chan->handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset; | |
57773204 MD |
1262 | return 0; |
1263 | } | |
1264 | ||
1265 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1266 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1267 | unsigned long *len) | |
57773204 | 1268 | { |
74d81a6c | 1269 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1270 | struct channel *chan; |
74d81a6c | 1271 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1272 | |
74d81a6c | 1273 | if (!stream) |
9bfc503d MD |
1274 | return -EINVAL; |
1275 | ||
74d81a6c MD |
1276 | buf = stream->buf; |
1277 | consumer_chan = stream->chan; | |
1278 | chan = consumer_chan->chan->chan; | |
57773204 | 1279 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1280 | consumer_chan->chan->handle); |
57773204 MD |
1281 | return 0; |
1282 | } | |
1283 | ||
1284 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1285 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1286 | unsigned long *len) | |
57773204 | 1287 | { |
74d81a6c | 1288 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1289 | struct channel *chan; |
74d81a6c | 1290 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1291 | |
74d81a6c | 1292 | if (!stream) |
9bfc503d | 1293 | return -EINVAL; |
74d81a6c MD |
1294 | buf = stream->buf; |
1295 | consumer_chan = stream->chan; | |
1296 | chan = consumer_chan->chan->chan; | |
57773204 | 1297 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1298 | consumer_chan->chan->handle); |
57773204 MD |
1299 | *len = PAGE_ALIGN(*len); |
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1304 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1305 | { |
74d81a6c MD |
1306 | struct lttng_ust_lib_ring_buffer *buf; |
1307 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1308 | |
74d81a6c MD |
1309 | if (!stream) |
1310 | return -EINVAL; | |
1311 | buf = stream->buf; | |
1312 | consumer_chan = stream->chan; | |
1313 | return lib_ring_buffer_get_next_subbuf(buf, | |
1314 | consumer_chan->chan->handle); | |
57773204 MD |
1315 | } |
1316 | ||
1317 | ||
1318 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1319 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1320 | { |
74d81a6c MD |
1321 | struct lttng_ust_lib_ring_buffer *buf; |
1322 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1323 | |
74d81a6c MD |
1324 | if (!stream) |
1325 | return -EINVAL; | |
1326 | buf = stream->buf; | |
1327 | consumer_chan = stream->chan; | |
1328 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1329 | return 0; |
1330 | } | |
1331 | ||
1332 | /* snapshot */ | |
1333 | ||
1334 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1335 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1336 | { |
74d81a6c MD |
1337 | struct lttng_ust_lib_ring_buffer *buf; |
1338 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1339 | |
74d81a6c MD |
1340 | if (!stream) |
1341 | return -EINVAL; | |
1342 | buf = stream->buf; | |
1343 | consumer_chan = stream->chan; | |
57773204 | 1344 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1345 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1346 | } |
1347 | ||
1348 | /* Get the consumer position (iteration start) */ | |
74d81a6c MD |
1349 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1350 | unsigned long *pos) | |
57773204 | 1351 | { |
74d81a6c | 1352 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1353 | |
74d81a6c MD |
1354 | if (!stream) |
1355 | return -EINVAL; | |
1356 | buf = stream->buf; | |
57773204 MD |
1357 | *pos = buf->cons_snapshot; |
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1362 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1363 | unsigned long *pos) | |
57773204 | 1364 | { |
74d81a6c | 1365 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1366 | |
74d81a6c MD |
1367 | if (!stream) |
1368 | return -EINVAL; | |
1369 | buf = stream->buf; | |
57773204 MD |
1370 | *pos = buf->prod_snapshot; |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1375 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1376 | unsigned long *pos) | |
57773204 | 1377 | { |
74d81a6c MD |
1378 | struct lttng_ust_lib_ring_buffer *buf; |
1379 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1380 | |
74d81a6c MD |
1381 | if (!stream) |
1382 | return -EINVAL; | |
1383 | buf = stream->buf; | |
1384 | consumer_chan = stream->chan; | |
1385 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1386 | consumer_chan->chan->handle); | |
57773204 MD |
1387 | } |
1388 | ||
1389 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1390 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1391 | { |
74d81a6c MD |
1392 | struct lttng_ust_lib_ring_buffer *buf; |
1393 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1394 | |
74d81a6c MD |
1395 | if (!stream) |
1396 | return -EINVAL; | |
1397 | buf = stream->buf; | |
1398 | consumer_chan = stream->chan; | |
1399 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1400 | return 0; |
1401 | } | |
1402 | ||
74d81a6c | 1403 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1404 | int producer_active) |
57773204 | 1405 | { |
74d81a6c MD |
1406 | struct lttng_ust_lib_ring_buffer *buf; |
1407 | struct ustctl_consumer_channel *consumer_chan; | |
1408 | ||
1409 | assert(stream); | |
1410 | buf = stream->buf; | |
1411 | consumer_chan = stream->chan; | |
b52190f2 MD |
1412 | lib_ring_buffer_switch_slow(buf, |
1413 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1414 | consumer_chan->chan->handle); |
1415 | } | |
1416 | ||
32ce8569 MD |
1417 | /* |
1418 | * Returns 0 on success, negative error value on error. | |
1419 | */ | |
1420 | int ustctl_recv_reg_msg(int sock, | |
1421 | enum ustctl_socket_type *type, | |
1422 | uint32_t *major, | |
1423 | uint32_t *minor, | |
1424 | uint32_t *pid, | |
1425 | uint32_t *ppid, | |
1426 | uint32_t *uid, | |
1427 | uint32_t *gid, | |
1428 | uint32_t *bits_per_long, | |
1429 | uint32_t *uint8_t_alignment, | |
1430 | uint32_t *uint16_t_alignment, | |
1431 | uint32_t *uint32_t_alignment, | |
1432 | uint32_t *uint64_t_alignment, | |
1433 | uint32_t *long_alignment, | |
1434 | int *byte_order, | |
1435 | char *name) | |
1436 | { | |
1437 | ssize_t len; | |
1438 | struct ustctl_reg_msg reg_msg; | |
1439 | ||
1440 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
1441 | if (len > 0 && len != sizeof(reg_msg)) | |
1442 | return -EIO; | |
1443 | if (len == 0) | |
1444 | return -EPIPE; | |
1445 | if (len < 0) | |
1446 | return len; | |
1447 | ||
1448 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
1449 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1450 | BIG_ENDIAN : LITTLE_ENDIAN; | |
1451 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
1452 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1453 | LITTLE_ENDIAN : BIG_ENDIAN; | |
1454 | } else { | |
1455 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
1456 | } | |
1457 | switch (reg_msg.socket_type) { | |
1458 | case 0: *type = USTCTL_SOCKET_CMD; | |
1459 | break; | |
1460 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
1461 | break; | |
1462 | default: | |
1463 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
1464 | } | |
1465 | *major = reg_msg.major; | |
1466 | *minor = reg_msg.minor; | |
1467 | *pid = reg_msg.pid; | |
1468 | *ppid = reg_msg.ppid; | |
1469 | *uid = reg_msg.uid; | |
1470 | *gid = reg_msg.gid; | |
1471 | *bits_per_long = reg_msg.bits_per_long; | |
1472 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
1473 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
1474 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
1475 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
1476 | *long_alignment = reg_msg.long_alignment; | |
1477 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
1478 | if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) { | |
1479 | return -LTTNG_UST_ERR_UNSUP_MAJOR; | |
1480 | } | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
1486 | { | |
1487 | struct ustcomm_notify_hdr header; | |
1488 | ssize_t len; | |
1489 | ||
1490 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
1491 | if (len > 0 && len != sizeof(header)) | |
1492 | return -EIO; | |
1493 | if (len == 0) | |
1494 | return -EPIPE; | |
1495 | if (len < 0) | |
1496 | return len; | |
1497 | switch (header.notify_cmd) { | |
1498 | case 0: | |
1499 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1500 | break; | |
1501 | case 1: | |
1502 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1503 | break; | |
1504 | default: | |
1505 | return -EINVAL; | |
1506 | } | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | /* | |
1511 | * Returns 0 on success, negative error value on error. | |
1512 | */ | |
1513 | int ustctl_recv_register_event(int sock, | |
1514 | int *session_objd, | |
1515 | int *channel_objd, | |
1516 | char *event_name, | |
1517 | int *loglevel, | |
1518 | char **signature, | |
1519 | size_t *nr_fields, | |
1520 | struct ustctl_field **fields, | |
1521 | char **model_emf_uri) | |
1522 | { | |
1523 | ssize_t len; | |
1524 | struct ustcomm_notify_event_msg msg; | |
1525 | size_t signature_len, fields_len, model_emf_uri_len; | |
1526 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
1527 | struct ustctl_field *a_fields = NULL; | |
1528 | ||
1529 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1530 | if (len > 0 && len != sizeof(msg)) | |
1531 | return -EIO; | |
1532 | if (len == 0) | |
1533 | return -EPIPE; | |
1534 | if (len < 0) | |
1535 | return len; | |
1536 | ||
1537 | *session_objd = msg.session_objd; | |
1538 | *channel_objd = msg.channel_objd; | |
1539 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1540 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1541 | *loglevel = msg.loglevel; | |
1542 | signature_len = msg.signature_len; | |
1543 | fields_len = msg.fields_len; | |
1544 | ||
1545 | if (fields_len % sizeof(*a_fields) != 0) { | |
1546 | return -EINVAL; | |
1547 | } | |
1548 | ||
1549 | model_emf_uri_len = msg.model_emf_uri_len; | |
1550 | ||
1551 | /* recv signature. contains at least \0. */ | |
1552 | a_sign = zmalloc(signature_len); | |
1553 | if (!a_sign) | |
1554 | return -ENOMEM; | |
1555 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
1556 | if (len > 0 && len != signature_len) { | |
1557 | len = -EIO; | |
1558 | goto signature_error; | |
1559 | } | |
1560 | if (len == 0) { | |
1561 | len = -EPIPE; | |
1562 | goto signature_error; | |
1563 | } | |
1564 | if (len < 0) { | |
1565 | goto signature_error; | |
1566 | } | |
1567 | /* Enforce end of string */ | |
1568 | signature[signature_len - 1] = '\0'; | |
1569 | ||
1570 | /* recv fields */ | |
1571 | if (fields_len) { | |
1572 | a_fields = zmalloc(fields_len); | |
1573 | if (!a_fields) { | |
1574 | len = -ENOMEM; | |
1575 | goto signature_error; | |
1576 | } | |
1577 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1578 | if (len > 0 && len != fields_len) { | |
1579 | len = -EIO; | |
1580 | goto fields_error; | |
1581 | } | |
1582 | if (len == 0) { | |
1583 | len = -EPIPE; | |
1584 | goto fields_error; | |
1585 | } | |
1586 | if (len < 0) { | |
1587 | goto fields_error; | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | if (model_emf_uri_len) { | |
1592 | /* recv model_emf_uri_len */ | |
1593 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
1594 | if (!a_model_emf_uri) { | |
1595 | len = -ENOMEM; | |
1596 | goto fields_error; | |
1597 | } | |
1598 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
1599 | model_emf_uri_len); | |
1600 | if (len > 0 && len != model_emf_uri_len) { | |
1601 | len = -EIO; | |
1602 | goto model_error; | |
1603 | } | |
1604 | if (len == 0) { | |
1605 | len = -EPIPE; | |
1606 | goto model_error; | |
1607 | } | |
1608 | if (len < 0) { | |
1609 | goto model_error; | |
1610 | } | |
1611 | /* Enforce end of string */ | |
1612 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
1613 | } | |
1614 | ||
1615 | *signature = a_sign; | |
1616 | *nr_fields = fields_len / sizeof(*a_fields); | |
1617 | *fields = a_fields; | |
1618 | *model_emf_uri = a_model_emf_uri; | |
1619 | ||
1620 | return 0; | |
1621 | ||
1622 | model_error: | |
1623 | free(a_model_emf_uri); | |
1624 | fields_error: | |
1625 | free(a_fields); | |
1626 | signature_error: | |
1627 | free(a_sign); | |
1628 | return len; | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * Returns 0 on success, negative error value on error. | |
1633 | */ | |
1634 | int ustctl_reply_register_event(int sock, | |
1635 | uint32_t id, | |
1636 | int ret_code) | |
1637 | { | |
1638 | ssize_t len; | |
1639 | struct { | |
1640 | struct ustcomm_notify_hdr header; | |
1641 | struct ustcomm_notify_event_reply r; | |
1642 | } reply; | |
1643 | ||
1644 | memset(&reply, 0, sizeof(reply)); | |
1645 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1646 | reply.r.ret_code = ret_code; | |
1647 | reply.r.event_id = id; | |
1648 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1649 | if (len > 0 && len != sizeof(reply)) | |
1650 | return -EIO; | |
1651 | if (len < 0) | |
1652 | return len; | |
1653 | return 0; | |
1654 | } | |
1655 | ||
1656 | /* | |
1657 | * Returns 0 on success, negative UST or system error value on error. | |
1658 | */ | |
1659 | int ustctl_recv_register_channel(int sock, | |
1660 | int *session_objd, /* session descriptor (output) */ | |
1661 | int *channel_objd, /* channel descriptor (output) */ | |
1662 | size_t *nr_fields, | |
1663 | struct ustctl_field **fields) | |
1664 | { | |
1665 | ssize_t len; | |
1666 | struct ustcomm_notify_channel_msg msg; | |
1667 | size_t fields_len; | |
1668 | struct ustctl_field *a_fields; | |
1669 | ||
1670 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1671 | if (len > 0 && len != sizeof(msg)) | |
1672 | return -EIO; | |
1673 | if (len == 0) | |
1674 | return -EPIPE; | |
1675 | if (len < 0) | |
1676 | return len; | |
1677 | ||
1678 | *session_objd = msg.session_objd; | |
1679 | *channel_objd = msg.channel_objd; | |
1680 | fields_len = msg.ctx_fields_len; | |
1681 | ||
1682 | if (fields_len % sizeof(*a_fields) != 0) { | |
1683 | return -EINVAL; | |
1684 | } | |
1685 | ||
1686 | /* recv fields */ | |
1687 | if (fields_len) { | |
1688 | a_fields = zmalloc(fields_len); | |
1689 | if (!a_fields) { | |
1690 | len = -ENOMEM; | |
1691 | goto alloc_error; | |
1692 | } | |
1693 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1694 | if (len > 0 && len != fields_len) { | |
1695 | len = -EIO; | |
1696 | goto fields_error; | |
1697 | } | |
1698 | if (len == 0) { | |
1699 | len = -EPIPE; | |
1700 | goto fields_error; | |
1701 | } | |
1702 | if (len < 0) { | |
1703 | goto fields_error; | |
1704 | } | |
1705 | *fields = a_fields; | |
1706 | } else { | |
1707 | *fields = NULL; | |
1708 | } | |
1709 | *nr_fields = fields_len / sizeof(*a_fields); | |
1710 | return 0; | |
1711 | ||
1712 | fields_error: | |
1713 | free(a_fields); | |
1714 | alloc_error: | |
1715 | return len; | |
1716 | } | |
1717 | ||
1718 | /* | |
1719 | * Returns 0 on success, negative error value on error. | |
1720 | */ | |
1721 | int ustctl_reply_register_channel(int sock, | |
1722 | uint32_t chan_id, | |
1723 | enum ustctl_channel_header header_type, | |
1724 | int ret_code) | |
1725 | { | |
1726 | ssize_t len; | |
1727 | struct { | |
1728 | struct ustcomm_notify_hdr header; | |
1729 | struct ustcomm_notify_channel_reply r; | |
1730 | } reply; | |
1731 | ||
1732 | memset(&reply, 0, sizeof(reply)); | |
1733 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1734 | reply.r.ret_code = ret_code; | |
1735 | reply.r.chan_id = chan_id; | |
1736 | switch (header_type) { | |
1737 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
1738 | reply.r.header_type = 1; | |
1739 | break; | |
1740 | case USTCTL_CHANNEL_HEADER_LARGE: | |
1741 | reply.r.header_type = 2; | |
1742 | break; | |
1743 | default: | |
1744 | reply.r.header_type = 0; | |
1745 | break; | |
1746 | } | |
1747 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1748 | if (len > 0 && len != sizeof(reply)) | |
1749 | return -EIO; | |
1750 | if (len < 0) | |
1751 | return len; | |
1752 | return 0; | |
1753 | } | |
1754 | ||
74d81a6c MD |
1755 | static __attribute__((constructor)) |
1756 | void ustctl_init(void) | |
1757 | { | |
1758 | init_usterr(); | |
1759 | lttng_ring_buffer_metadata_client_init(); | |
1760 | lttng_ring_buffer_client_overwrite_init(); | |
1761 | lttng_ring_buffer_client_discard_init(); | |
03d2d293 | 1762 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
1763 | } |
1764 | ||
1765 | static __attribute__((destructor)) | |
1766 | void ustctl_exit(void) | |
1767 | { | |
1768 | lttng_ring_buffer_client_discard_exit(); | |
1769 | lttng_ring_buffer_client_overwrite_exit(); | |
1770 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 1771 | } |