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); | |
08a3170c | 66 | extern void lttng_ring_buffer_client_overwrite_rt_init(void); |
74d81a6c | 67 | extern void lttng_ring_buffer_client_discard_init(void); |
08a3170c | 68 | extern void lttng_ring_buffer_client_discard_rt_init(void); |
74d81a6c MD |
69 | extern void lttng_ring_buffer_metadata_client_init(void); |
70 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
08a3170c | 71 | extern void lttng_ring_buffer_client_overwrite_rt_exit(void); |
74d81a6c | 72 | extern void lttng_ring_buffer_client_discard_exit(void); |
08a3170c | 73 | extern void lttng_ring_buffer_client_discard_rt_exit(void); |
74d81a6c MD |
74 | extern void lttng_ring_buffer_metadata_client_exit(void); |
75 | ||
76 | volatile enum ust_loglevel ust_loglevel; | |
57773204 | 77 | |
2be0e72c MD |
78 | int ustctl_release_handle(int sock, int handle) |
79 | { | |
80 | struct ustcomm_ust_msg lum; | |
81 | struct ustcomm_ust_reply lur; | |
2be0e72c | 82 | |
74d81a6c MD |
83 | if (sock < 0 || handle < 0) |
84 | return 0; | |
85 | memset(&lum, 0, sizeof(lum)); | |
86 | lum.handle = handle; | |
87 | lum.cmd = LTTNG_UST_RELEASE; | |
88 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 89 | } |
74d81a6c | 90 | |
12388166 MD |
91 | /* |
92 | * If sock is negative, it means we don't have to notify the other side | |
93 | * (e.g. application has already vanished). | |
94 | */ | |
d26228ae | 95 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 96 | { |
57773204 MD |
97 | int ret; |
98 | ||
9bfc503d MD |
99 | if (!data) |
100 | return -EINVAL; | |
101 | ||
74d81a6c MD |
102 | switch (data->type) { |
103 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
ff0f5728 MD |
104 | if (data->u.channel.wakeup_fd >= 0) { |
105 | ret = close(data->u.channel.wakeup_fd); | |
106 | if (ret < 0) { | |
107 | ret = -errno; | |
108 | return ret; | |
109 | } | |
110 | } | |
74d81a6c MD |
111 | free(data->u.channel.data); |
112 | break; | |
113 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
114 | if (data->u.stream.shm_fd >= 0) { | |
115 | ret = close(data->u.stream.shm_fd); | |
116 | if (ret < 0) { | |
117 | ret = -errno; | |
118 | return ret; | |
119 | } | |
d26228ae | 120 | } |
74d81a6c MD |
121 | if (data->u.stream.wakeup_fd >= 0) { |
122 | ret = close(data->u.stream.wakeup_fd); | |
123 | if (ret < 0) { | |
124 | ret = -errno; | |
125 | return ret; | |
126 | } | |
d26228ae | 127 | } |
74d81a6c | 128 | break; |
32ce8569 MD |
129 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
130 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
131 | break; | |
74d81a6c MD |
132 | default: |
133 | assert(0); | |
d26228ae | 134 | } |
2be0e72c | 135 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
136 | } |
137 | ||
1c5e467e MD |
138 | /* |
139 | * Send registration done packet to the application. | |
140 | */ | |
141 | int ustctl_register_done(int sock) | |
142 | { | |
143 | struct ustcomm_ust_msg lum; | |
144 | struct ustcomm_ust_reply lur; | |
145 | int ret; | |
146 | ||
147 | DBG("Sending register done command to %d", sock); | |
148 | memset(&lum, 0, sizeof(lum)); | |
149 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
150 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
151 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
152 | if (ret) | |
153 | return ret; | |
1c5e467e | 154 | return 0; |
1c5e467e MD |
155 | } |
156 | ||
57773204 MD |
157 | /* |
158 | * returns session handle. | |
159 | */ | |
160 | int ustctl_create_session(int sock) | |
161 | { | |
162 | struct ustcomm_ust_msg lum; | |
163 | struct ustcomm_ust_reply lur; | |
164 | int ret, session_handle; | |
165 | ||
166 | /* Create session */ | |
167 | memset(&lum, 0, sizeof(lum)); | |
168 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
169 | lum.cmd = LTTNG_UST_SESSION; | |
170 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
171 | if (ret) | |
172 | return ret; | |
173 | session_handle = lur.ret_val; | |
174 | DBG("received session handle %u", session_handle); | |
175 | return session_handle; | |
176 | } | |
177 | ||
57773204 | 178 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
179 | struct lttng_ust_object_data *channel_data, |
180 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
181 | { |
182 | struct ustcomm_ust_msg lum; | |
183 | struct ustcomm_ust_reply lur; | |
61f02aea | 184 | struct lttng_ust_object_data *event_data; |
57773204 MD |
185 | int ret; |
186 | ||
9bfc503d MD |
187 | if (!channel_data || !_event_data) |
188 | return -EINVAL; | |
189 | ||
74d81a6c | 190 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
191 | if (!event_data) |
192 | return -ENOMEM; | |
32ce8569 | 193 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
194 | memset(&lum, 0, sizeof(lum)); |
195 | lum.handle = channel_data->handle; | |
196 | lum.cmd = LTTNG_UST_EVENT; | |
197 | strncpy(lum.u.event.name, ev->name, | |
198 | LTTNG_UST_SYM_NAME_LEN); | |
199 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
200 | lum.u.event.loglevel_type = ev->loglevel_type; |
201 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
202 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
203 | if (ret) { | |
204 | free(event_data); | |
205 | return ret; | |
206 | } | |
207 | event_data->handle = lur.ret_val; | |
208 | DBG("received event handle %u", event_data->handle); | |
209 | *_event_data = event_data; | |
210 | return 0; | |
211 | } | |
212 | ||
213 | int ustctl_add_context(int sock, struct lttng_ust_context *ctx, | |
61f02aea MD |
214 | struct lttng_ust_object_data *obj_data, |
215 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
216 | { |
217 | struct ustcomm_ust_msg lum; | |
218 | struct ustcomm_ust_reply lur; | |
61f02aea | 219 | struct lttng_ust_object_data *context_data; |
57773204 MD |
220 | int ret; |
221 | ||
9bfc503d MD |
222 | if (!obj_data || !_context_data) |
223 | return -EINVAL; | |
224 | ||
74d81a6c | 225 | context_data = zmalloc(sizeof(*context_data)); |
57773204 MD |
226 | if (!context_data) |
227 | return -ENOMEM; | |
32ce8569 | 228 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 229 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 230 | lum.handle = obj_data->handle; |
57773204 MD |
231 | lum.cmd = LTTNG_UST_CONTEXT; |
232 | lum.u.context.ctx = ctx->ctx; | |
233 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
234 | if (ret) { | |
235 | free(context_data); | |
236 | return ret; | |
237 | } | |
32ce8569 MD |
238 | context_data->handle = -1; |
239 | DBG("Context created successfully"); | |
57773204 MD |
240 | *_context_data = context_data; |
241 | return ret; | |
242 | } | |
243 | ||
cd54f6d9 MD |
244 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
245 | struct lttng_ust_object_data *obj_data) | |
246 | { | |
247 | struct ustcomm_ust_msg lum; | |
248 | struct ustcomm_ust_reply lur; | |
249 | int ret; | |
250 | ||
251 | if (!obj_data) | |
252 | return -EINVAL; | |
253 | ||
254 | memset(&lum, 0, sizeof(lum)); | |
255 | lum.handle = obj_data->handle; | |
256 | lum.cmd = LTTNG_UST_FILTER; | |
257 | lum.u.filter.data_size = bytecode->len; | |
258 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 259 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
260 | |
261 | ret = ustcomm_send_app_msg(sock, &lum); | |
262 | if (ret) | |
263 | return ret; | |
cd54f6d9 MD |
264 | /* send var len bytecode */ |
265 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
266 | bytecode->len); | |
267 | if (ret < 0) { | |
268 | return ret; | |
269 | } | |
7bc53e94 MD |
270 | if (ret != bytecode->len) |
271 | return -EINVAL; | |
272 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
273 | } |
274 | ||
57773204 | 275 | /* Enable event, channel and session ioctl */ |
61f02aea | 276 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
277 | { |
278 | struct ustcomm_ust_msg lum; | |
279 | struct ustcomm_ust_reply lur; | |
280 | int ret; | |
281 | ||
9bfc503d MD |
282 | if (!object) |
283 | return -EINVAL; | |
284 | ||
57773204 MD |
285 | memset(&lum, 0, sizeof(lum)); |
286 | lum.handle = object->handle; | |
287 | lum.cmd = LTTNG_UST_ENABLE; | |
288 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
289 | if (ret) | |
290 | return ret; | |
291 | DBG("enabled handle %u", object->handle); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | /* Disable event, channel and session ioctl */ | |
61f02aea | 296 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
297 | { |
298 | struct ustcomm_ust_msg lum; | |
299 | struct ustcomm_ust_reply lur; | |
300 | int ret; | |
301 | ||
9bfc503d MD |
302 | if (!object) |
303 | return -EINVAL; | |
304 | ||
57773204 MD |
305 | memset(&lum, 0, sizeof(lum)); |
306 | lum.handle = object->handle; | |
307 | lum.cmd = LTTNG_UST_DISABLE; | |
308 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
309 | if (ret) | |
310 | return ret; | |
311 | DBG("disable handle %u", object->handle); | |
312 | return 0; | |
313 | } | |
314 | ||
4a6ca058 | 315 | int ustctl_start_session(int sock, int handle) |
57773204 | 316 | { |
61f02aea | 317 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
318 | |
319 | obj.handle = handle; | |
320 | return ustctl_enable(sock, &obj); | |
57773204 MD |
321 | } |
322 | ||
4a6ca058 | 323 | int ustctl_stop_session(int sock, int handle) |
57773204 | 324 | { |
61f02aea | 325 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
326 | |
327 | obj.handle = handle; | |
328 | return ustctl_disable(sock, &obj); | |
57773204 MD |
329 | } |
330 | ||
57773204 MD |
331 | int ustctl_tracepoint_list(int sock) |
332 | { | |
b115631f MD |
333 | struct ustcomm_ust_msg lum; |
334 | struct ustcomm_ust_reply lur; | |
335 | int ret, tp_list_handle; | |
336 | ||
337 | memset(&lum, 0, sizeof(lum)); | |
338 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
339 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
340 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
341 | if (ret) | |
342 | return ret; | |
343 | tp_list_handle = lur.ret_val; | |
344 | DBG("received tracepoint list handle %u", tp_list_handle); | |
345 | return tp_list_handle; | |
346 | } | |
347 | ||
348 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 349 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
350 | { |
351 | struct ustcomm_ust_msg lum; | |
352 | struct ustcomm_ust_reply lur; | |
353 | int ret; | |
354 | ||
9bfc503d MD |
355 | if (!iter) |
356 | return -EINVAL; | |
357 | ||
b115631f MD |
358 | memset(&lum, 0, sizeof(lum)); |
359 | lum.handle = tp_list_handle; | |
360 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
361 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
362 | if (ret) | |
363 | return ret; | |
882a56d7 | 364 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 365 | lur.u.tracepoint.name, |
882a56d7 | 366 | lur.u.tracepoint.loglevel); |
cbef6901 | 367 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 368 | return 0; |
57773204 MD |
369 | } |
370 | ||
40003310 MD |
371 | int ustctl_tracepoint_field_list(int sock) |
372 | { | |
373 | struct ustcomm_ust_msg lum; | |
374 | struct ustcomm_ust_reply lur; | |
375 | int ret, tp_field_list_handle; | |
376 | ||
377 | memset(&lum, 0, sizeof(lum)); | |
378 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
379 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
380 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
381 | if (ret) | |
382 | return ret; | |
383 | tp_field_list_handle = lur.ret_val; | |
384 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
385 | return tp_field_list_handle; | |
386 | } | |
387 | ||
388 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
389 | struct lttng_ust_field_iter *iter) | |
390 | { | |
391 | struct ustcomm_ust_msg lum; | |
392 | struct ustcomm_ust_reply lur; | |
393 | int ret; | |
394 | ssize_t len; | |
395 | ||
396 | if (!iter) | |
397 | return -EINVAL; | |
398 | ||
399 | memset(&lum, 0, sizeof(lum)); | |
400 | lum.handle = tp_field_list_handle; | |
401 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
402 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
403 | if (ret) | |
404 | return ret; | |
405 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
406 | if (len != sizeof(*iter)) { | |
407 | return -EINVAL; | |
408 | } | |
409 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
410 | iter->event_name, | |
411 | iter->loglevel, | |
412 | iter->field_name, | |
413 | iter->type); | |
414 | return 0; | |
415 | } | |
416 | ||
57773204 MD |
417 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
418 | { | |
419 | struct ustcomm_ust_msg lum; | |
420 | struct ustcomm_ust_reply lur; | |
421 | int ret; | |
422 | ||
9bfc503d MD |
423 | if (!v) |
424 | return -EINVAL; | |
425 | ||
57773204 MD |
426 | memset(&lum, 0, sizeof(lum)); |
427 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
428 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
429 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
430 | if (ret) | |
431 | return ret; | |
432 | memcpy(v, &lur.u.version, sizeof(*v)); | |
433 | DBG("received tracer version"); | |
434 | return 0; | |
435 | } | |
436 | ||
437 | int ustctl_wait_quiescent(int sock) | |
438 | { | |
439 | struct ustcomm_ust_msg lum; | |
440 | struct ustcomm_ust_reply lur; | |
441 | int ret; | |
442 | ||
443 | memset(&lum, 0, sizeof(lum)); | |
444 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
445 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
446 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
447 | if (ret) | |
448 | return ret; | |
449 | DBG("waited for quiescent state"); | |
450 | return 0; | |
451 | } | |
452 | ||
453 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
454 | { | |
9bfc503d MD |
455 | if (!calibrate) |
456 | return -EINVAL; | |
457 | ||
57773204 MD |
458 | return -ENOSYS; |
459 | } | |
460 | ||
f1fffc57 MD |
461 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
462 | { | |
463 | struct ustcomm_ust_msg lum; | |
464 | struct ustcomm_ust_reply lur; | |
465 | int ret; | |
466 | ||
9bfc503d MD |
467 | if (!object) |
468 | return -EINVAL; | |
469 | ||
f1fffc57 MD |
470 | memset(&lum, 0, sizeof(lum)); |
471 | lum.handle = object->handle; | |
472 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
473 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
474 | if (ret) | |
475 | return ret; | |
476 | DBG("flushed buffer handle %u", object->handle); | |
477 | return 0; | |
478 | } | |
479 | ||
74d81a6c MD |
480 | static |
481 | int ustctl_send_channel(int sock, | |
482 | enum lttng_ust_chan_type type, | |
483 | void *data, | |
484 | uint64_t size, | |
ff0f5728 | 485 | int wakeup_fd, |
74d81a6c MD |
486 | int send_fd_only) |
487 | { | |
488 | ssize_t len; | |
489 | ||
490 | if (!send_fd_only) { | |
491 | /* Send mmap size */ | |
492 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
493 | if (len != sizeof(size)) { | |
494 | if (len < 0) | |
495 | return len; | |
496 | else | |
497 | return -EIO; | |
498 | } | |
499 | ||
500 | /* Send channel type */ | |
501 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
502 | if (len != sizeof(type)) { | |
503 | if (len < 0) | |
504 | return len; | |
505 | else | |
506 | return -EIO; | |
507 | } | |
508 | } | |
509 | ||
510 | /* Send channel data */ | |
511 | len = ustcomm_send_unix_sock(sock, data, size); | |
512 | if (len != size) { | |
513 | if (len < 0) | |
514 | return len; | |
515 | else | |
516 | return -EIO; | |
517 | } | |
57773204 | 518 | |
ff0f5728 MD |
519 | /* Send wakeup fd */ |
520 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
521 | if (len <= 0) { | |
522 | if (len < 0) | |
523 | return len; | |
524 | else | |
525 | return -EIO; | |
526 | } | |
74d81a6c MD |
527 | return 0; |
528 | } | |
529 | ||
530 | static | |
531 | int ustctl_send_stream(int sock, | |
532 | uint32_t stream_nr, | |
533 | uint64_t memory_map_size, | |
534 | int shm_fd, int wakeup_fd, | |
535 | int send_fd_only) | |
57773204 | 536 | { |
74d81a6c MD |
537 | ssize_t len; |
538 | int fds[2]; | |
539 | ||
540 | if (!send_fd_only) { | |
541 | if (shm_fd < 0) { | |
542 | /* finish iteration */ | |
543 | uint64_t v = -1; | |
544 | ||
545 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
546 | if (len != sizeof(v)) { | |
547 | if (len < 0) | |
548 | return len; | |
549 | else | |
550 | return -EIO; | |
551 | } | |
552 | return 0; | |
553 | } | |
554 | ||
555 | /* Send mmap size */ | |
556 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
557 | sizeof(memory_map_size)); | |
558 | if (len != sizeof(memory_map_size)) { | |
559 | if (len < 0) | |
560 | return len; | |
561 | else | |
562 | return -EIO; | |
563 | } | |
564 | ||
565 | /* Send stream nr */ | |
566 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
567 | sizeof(stream_nr)); | |
568 | if (len != sizeof(stream_nr)) { | |
569 | if (len < 0) | |
570 | return len; | |
571 | else | |
572 | return -EIO; | |
573 | } | |
574 | } | |
575 | ||
576 | /* Send shm fd and wakeup fd */ | |
577 | fds[0] = shm_fd; | |
578 | fds[1] = wakeup_fd; | |
579 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
580 | if (len <= 0) { | |
581 | if (len < 0) | |
582 | return len; | |
583 | else | |
584 | return -EIO; | |
585 | } | |
586 | return 0; | |
587 | } | |
588 | ||
589 | int ustctl_recv_channel_from_consumer(int sock, | |
590 | struct lttng_ust_object_data **_channel_data) | |
591 | { | |
592 | struct lttng_ust_object_data *channel_data; | |
593 | ssize_t len; | |
ff0f5728 | 594 | int wakeup_fd; |
7a784989 | 595 | int ret; |
57773204 | 596 | |
74d81a6c MD |
597 | channel_data = zmalloc(sizeof(*channel_data)); |
598 | if (!channel_data) { | |
599 | ret = -ENOMEM; | |
600 | goto error_alloc; | |
601 | } | |
602 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
12f3dabc | 603 | channel_data->handle = -1; |
74d81a6c MD |
604 | |
605 | /* recv mmap size */ | |
606 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
607 | sizeof(channel_data->size)); | |
608 | if (len != sizeof(channel_data->size)) { | |
609 | if (len < 0) | |
610 | ret = len; | |
611 | else | |
612 | ret = -EINVAL; | |
613 | goto error; | |
614 | } | |
9bfc503d | 615 | |
74d81a6c MD |
616 | /* recv channel type */ |
617 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
618 | sizeof(channel_data->u.channel.type)); | |
619 | if (len != sizeof(channel_data->u.channel.type)) { | |
620 | if (len < 0) | |
621 | ret = len; | |
622 | else | |
623 | ret = -EINVAL; | |
624 | goto error; | |
625 | } | |
626 | ||
627 | /* recv channel data */ | |
628 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
629 | if (!channel_data->u.channel.data) { | |
630 | ret = -ENOMEM; | |
631 | goto error; | |
632 | } | |
633 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
634 | channel_data->size); | |
635 | if (len != channel_data->size) { | |
636 | if (len < 0) | |
637 | ret = len; | |
638 | else | |
639 | ret = -EINVAL; | |
640 | goto error_recv_data; | |
641 | } | |
ff0f5728 MD |
642 | /* recv wakeup fd */ |
643 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
644 | if (len <= 0) { | |
645 | if (len < 0) { | |
646 | ret = len; | |
647 | goto error_recv_data; | |
648 | } else { | |
649 | ret = -EIO; | |
650 | goto error_recv_data; | |
651 | } | |
652 | } | |
653 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
654 | *_channel_data = channel_data; |
655 | return 0; | |
656 | ||
657 | error_recv_data: | |
658 | free(channel_data->u.channel.data); | |
659 | error: | |
660 | free(channel_data); | |
661 | error_alloc: | |
662 | return ret; | |
663 | } | |
664 | ||
665 | int ustctl_recv_stream_from_consumer(int sock, | |
666 | struct lttng_ust_object_data **_stream_data) | |
667 | { | |
668 | struct lttng_ust_object_data *stream_data; | |
669 | ssize_t len; | |
670 | int ret; | |
671 | int fds[2]; | |
672 | ||
673 | stream_data = zmalloc(sizeof(*stream_data)); | |
674 | if (!stream_data) { | |
675 | ret = -ENOMEM; | |
676 | goto error_alloc; | |
57773204 | 677 | } |
74d81a6c MD |
678 | |
679 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
680 | stream_data->handle = -1; | |
681 | ||
682 | /* recv mmap size */ | |
683 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
684 | sizeof(stream_data->size)); | |
685 | if (len != sizeof(stream_data->size)) { | |
686 | if (len < 0) | |
687 | ret = len; | |
688 | else | |
689 | ret = -EINVAL; | |
690 | goto error; | |
691 | } | |
692 | if (stream_data->size == -1) { | |
693 | ret = -LTTNG_UST_ERR_NOENT; | |
694 | goto error; | |
695 | } | |
696 | ||
697 | /* recv stream nr */ | |
698 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
699 | sizeof(stream_data->u.stream.stream_nr)); | |
700 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
701 | if (len < 0) | |
702 | ret = len; | |
703 | else | |
704 | ret = -EINVAL; | |
705 | goto error; | |
706 | } | |
707 | ||
708 | /* recv shm fd and wakeup fd */ | |
709 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
710 | if (len <= 0) { | |
711 | if (len < 0) { | |
712 | ret = len; | |
713 | goto error; | |
714 | } else { | |
715 | ret = -EIO; | |
716 | goto error; | |
0bfe09ec | 717 | } |
0bfe09ec | 718 | } |
74d81a6c MD |
719 | stream_data->u.stream.shm_fd = fds[0]; |
720 | stream_data->u.stream.wakeup_fd = fds[1]; | |
721 | *_stream_data = stream_data; | |
722 | return 0; | |
0bfe09ec | 723 | |
74d81a6c MD |
724 | error: |
725 | free(stream_data); | |
726 | error_alloc: | |
727 | return ret; | |
728 | } | |
729 | ||
730 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
731 | struct lttng_ust_object_data *channel_data) | |
732 | { | |
733 | struct ustcomm_ust_msg lum; | |
734 | struct ustcomm_ust_reply lur; | |
735 | int ret; | |
736 | ||
737 | if (!channel_data) | |
738 | return -EINVAL; | |
739 | ||
740 | memset(&lum, 0, sizeof(lum)); | |
741 | lum.handle = session_handle; | |
742 | lum.cmd = LTTNG_UST_CHANNEL; | |
743 | lum.u.channel.len = channel_data->size; | |
744 | lum.u.channel.type = channel_data->u.channel.type; | |
745 | ret = ustcomm_send_app_msg(sock, &lum); | |
746 | if (ret) | |
747 | return ret; | |
748 | ||
749 | ret = ustctl_send_channel(sock, | |
750 | channel_data->u.channel.type, | |
751 | channel_data->u.channel.data, | |
752 | channel_data->size, | |
ff0f5728 | 753 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
754 | 1); |
755 | if (ret) | |
756 | return ret; | |
757 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
758 | if (!ret) { | |
7f2348b8 | 759 | channel_data->handle = lur.ret_val; |
57773204 | 760 | } |
74d81a6c MD |
761 | return ret; |
762 | } | |
763 | ||
764 | int ustctl_send_stream_to_ust(int sock, | |
765 | struct lttng_ust_object_data *channel_data, | |
766 | struct lttng_ust_object_data *stream_data) | |
767 | { | |
768 | struct ustcomm_ust_msg lum; | |
769 | struct ustcomm_ust_reply lur; | |
770 | int ret; | |
771 | ||
772 | memset(&lum, 0, sizeof(lum)); | |
773 | lum.handle = channel_data->handle; | |
774 | lum.cmd = LTTNG_UST_STREAM; | |
775 | lum.u.stream.len = stream_data->size; | |
776 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
777 | ret = ustcomm_send_app_msg(sock, &lum); | |
778 | if (ret) | |
779 | return ret; | |
780 | ||
781 | assert(stream_data); | |
782 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
783 | ||
784 | ret = ustctl_send_stream(sock, | |
785 | stream_data->u.stream.stream_nr, | |
786 | stream_data->size, | |
787 | stream_data->u.stream.shm_fd, | |
788 | stream_data->u.stream.wakeup_fd, 1); | |
789 | if (ret) | |
790 | return ret; | |
791 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
792 | } | |
793 | ||
12f3dabc MD |
794 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, |
795 | struct lttng_ust_object_data *src) | |
796 | { | |
797 | struct lttng_ust_object_data *obj; | |
798 | int ret; | |
799 | ||
800 | if (src->handle != -1) { | |
801 | ret = -EINVAL; | |
802 | goto error; | |
803 | } | |
804 | ||
805 | obj = zmalloc(sizeof(*obj)); | |
806 | if (!obj) { | |
807 | ret = -ENOMEM; | |
808 | goto error; | |
809 | } | |
810 | ||
811 | obj->type = src->type; | |
812 | obj->handle = src->handle; | |
813 | obj->size = src->size; | |
814 | ||
815 | switch (obj->type) { | |
816 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
817 | { | |
818 | obj->u.channel.type = src->u.channel.type; | |
819 | if (src->u.channel.wakeup_fd >= 0) { | |
820 | obj->u.channel.wakeup_fd = | |
821 | dup(src->u.channel.wakeup_fd); | |
822 | if (obj->u.channel.wakeup_fd < 0) { | |
823 | ret = errno; | |
824 | goto chan_error_wakeup_fd; | |
825 | } | |
826 | } else { | |
827 | obj->u.channel.wakeup_fd = | |
828 | src->u.channel.wakeup_fd; | |
829 | } | |
830 | obj->u.channel.data = zmalloc(obj->size); | |
831 | if (!obj->u.channel.data) { | |
832 | ret = -ENOMEM; | |
833 | goto chan_error_alloc; | |
834 | } | |
835 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
836 | break; | |
837 | ||
838 | chan_error_alloc: | |
839 | if (src->u.channel.wakeup_fd >= 0) { | |
840 | int closeret; | |
841 | ||
842 | closeret = close(obj->u.channel.wakeup_fd); | |
843 | if (closeret) { | |
844 | PERROR("close"); | |
845 | } | |
846 | } | |
847 | chan_error_wakeup_fd: | |
848 | goto error_type; | |
849 | ||
850 | } | |
851 | ||
852 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
853 | { | |
854 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
855 | if (src->u.stream.wakeup_fd >= 0) { | |
856 | obj->u.stream.wakeup_fd = | |
857 | dup(src->u.stream.wakeup_fd); | |
858 | if (obj->u.stream.wakeup_fd < 0) { | |
859 | ret = errno; | |
860 | goto stream_error_wakeup_fd; | |
861 | } | |
862 | } else { | |
863 | obj->u.stream.wakeup_fd = | |
864 | src->u.stream.wakeup_fd; | |
865 | } | |
866 | ||
867 | if (src->u.stream.shm_fd >= 0) { | |
868 | obj->u.stream.shm_fd = | |
869 | dup(src->u.stream.shm_fd); | |
870 | if (obj->u.stream.shm_fd < 0) { | |
871 | ret = errno; | |
872 | goto stream_error_shm_fd; | |
873 | } | |
874 | } else { | |
875 | obj->u.stream.shm_fd = | |
876 | src->u.stream.shm_fd; | |
877 | } | |
878 | break; | |
879 | ||
880 | stream_error_shm_fd: | |
881 | if (src->u.stream.wakeup_fd >= 0) { | |
882 | int closeret; | |
883 | ||
884 | closeret = close(obj->u.stream.wakeup_fd); | |
885 | if (closeret) { | |
886 | PERROR("close"); | |
887 | } | |
888 | } | |
889 | stream_error_wakeup_fd: | |
890 | goto error_type; | |
891 | } | |
892 | ||
893 | default: | |
894 | ret = -EINVAL; | |
895 | goto error_type; | |
896 | } | |
897 | ||
898 | *dest = obj; | |
899 | return 0; | |
900 | ||
901 | error_type: | |
902 | free(obj); | |
903 | error: | |
904 | return ret; | |
905 | } | |
906 | ||
74d81a6c MD |
907 | |
908 | /* Buffer operations */ | |
909 | ||
910 | struct ustctl_consumer_channel * | |
911 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr) | |
912 | { | |
913 | struct ustctl_consumer_channel *chan; | |
914 | const char *transport_name; | |
915 | struct lttng_transport *transport; | |
916 | ||
917 | switch (attr->type) { | |
918 | case LTTNG_UST_CHAN_PER_CPU: | |
919 | if (attr->output == LTTNG_UST_MMAP) { | |
34a91bdb MD |
920 | if (attr->overwrite) { |
921 | if (attr->read_timer_interval == 0) { | |
922 | transport_name = "relay-overwrite-mmap"; | |
923 | } else { | |
924 | transport_name = "relay-overwrite-rt-mmap"; | |
925 | } | |
926 | } else { | |
927 | if (attr->read_timer_interval == 0) { | |
928 | transport_name = "relay-discard-mmap"; | |
929 | } else { | |
930 | transport_name = "relay-discard-rt-mmap"; | |
931 | } | |
932 | } | |
74d81a6c MD |
933 | } else { |
934 | return NULL; | |
935 | } | |
c1fca457 | 936 | break; |
74d81a6c MD |
937 | case LTTNG_UST_CHAN_METADATA: |
938 | if (attr->output == LTTNG_UST_MMAP) | |
939 | transport_name = "relay-metadata-mmap"; | |
940 | else | |
941 | return NULL; | |
c1fca457 MD |
942 | break; |
943 | default: | |
74d81a6c | 944 | transport_name = "<unknown>"; |
c1fca457 MD |
945 | return NULL; |
946 | } | |
74d81a6c MD |
947 | |
948 | transport = lttng_transport_find(transport_name); | |
949 | if (!transport) { | |
950 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 951 | transport_name); |
74d81a6c | 952 | return NULL; |
7a784989 | 953 | } |
74d81a6c MD |
954 | |
955 | chan = zmalloc(sizeof(*chan)); | |
956 | if (!chan) | |
957 | return NULL; | |
958 | ||
959 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 960 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 961 | attr->switch_timer_interval, |
32ce8569 | 962 | attr->read_timer_interval, |
6ca18e66 | 963 | attr->uuid, attr->chan_id); |
74d81a6c MD |
964 | if (!chan->chan) { |
965 | goto chan_error; | |
966 | } | |
967 | chan->chan->ops = &transport->ops; | |
968 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
cb7378b3 MD |
969 | chan->wait_fd = ustctl_channel_get_wait_fd(chan); |
970 | chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
971 | return chan; |
972 | ||
973 | chan_error: | |
974 | free(chan); | |
975 | return NULL; | |
57773204 MD |
976 | } |
977 | ||
74d81a6c | 978 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 979 | { |
74d81a6c MD |
980 | chan->chan->ops->channel_destroy(chan->chan); |
981 | free(chan); | |
982 | } | |
983 | ||
984 | int ustctl_send_channel_to_sessiond(int sock, | |
985 | struct ustctl_consumer_channel *channel) | |
986 | { | |
987 | struct shm_object_table *table; | |
57773204 | 988 | |
74d81a6c MD |
989 | table = channel->chan->handle->table; |
990 | if (table->size <= 0) | |
9bfc503d | 991 | return -EINVAL; |
74d81a6c MD |
992 | return ustctl_send_channel(sock, |
993 | channel->attr.type, | |
994 | table->objects[0].memory_map, | |
995 | table->objects[0].memory_map_size, | |
ff0f5728 | 996 | channel->wakeup_fd, |
74d81a6c MD |
997 | 0); |
998 | } | |
9bfc503d | 999 | |
74d81a6c MD |
1000 | int ustctl_send_stream_to_sessiond(int sock, |
1001 | struct ustctl_consumer_stream *stream) | |
1002 | { | |
1003 | if (!stream) | |
1004 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
1005 | ||
1006 | return ustctl_send_stream(sock, | |
1007 | stream->cpu, | |
1008 | stream->memory_map_size, | |
1009 | stream->shm_fd, stream->wakeup_fd, | |
1010 | 0); | |
57773204 MD |
1011 | } |
1012 | ||
c9023c93 MD |
1013 | int ustctl_write_metadata_to_channel( |
1014 | struct ustctl_consumer_channel *channel, | |
1015 | const char *metadata_str, /* NOT null-terminated */ | |
1016 | size_t len) /* metadata length */ | |
1017 | { | |
1018 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1019 | struct lttng_channel *chan = channel->chan; | |
1020 | const char *str = metadata_str; | |
1021 | int ret = 0, waitret; | |
1022 | size_t reserve_len, pos; | |
1023 | ||
1024 | for (pos = 0; pos < len; pos += reserve_len) { | |
1025 | reserve_len = min_t(size_t, | |
1026 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1027 | len - pos); | |
1028 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
1029 | sizeof(char), -1, chan->handle); | |
1030 | /* | |
1031 | * We don't care about metadata buffer's records lost | |
1032 | * count, because we always retry here. Report error if | |
1033 | * we need to bail out after timeout or being | |
1034 | * interrupted. | |
1035 | */ | |
1036 | waitret = wait_cond_interruptible_timeout( | |
1037 | ({ | |
1038 | ret = chan->ops->event_reserve(&ctx, 0); | |
1039 | ret != -ENOBUFS || !ret; | |
1040 | }), | |
1041 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1042 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1043 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1044 | waitret == -EINTR ? "interrupted" : | |
1045 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1046 | if (waitret == -EINTR) | |
1047 | ret = waitret; | |
1048 | goto end; | |
1049 | } | |
1050 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
1051 | chan->ops->event_commit(&ctx); | |
1052 | } | |
1053 | end: | |
1054 | return ret; | |
1055 | } | |
1056 | ||
ff0f5728 MD |
1057 | int ustctl_channel_close_wait_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_wait_fd(&chan->backend.config, |
ff0f5728 | 1064 | chan, chan->handle); |
cb7378b3 MD |
1065 | if (!ret) |
1066 | consumer_chan->wait_fd = -1; | |
1067 | return ret; | |
ff0f5728 MD |
1068 | } |
1069 | ||
1070 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan) | |
1071 | { | |
1072 | struct channel *chan; | |
cb7378b3 | 1073 | int ret; |
ff0f5728 MD |
1074 | |
1075 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1076 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1077 | chan, chan->handle); |
cb7378b3 MD |
1078 | if (!ret) |
1079 | consumer_chan->wakeup_fd = -1; | |
1080 | return ret; | |
ff0f5728 MD |
1081 | } |
1082 | ||
74d81a6c | 1083 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
1084 | { |
1085 | struct channel *chan; | |
1086 | ||
74d81a6c | 1087 | chan = stream->chan->chan->chan; |
ff0f5728 | 1088 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
74d81a6c | 1089 | chan, stream->handle, stream->cpu); |
5224b5c8 MD |
1090 | } |
1091 | ||
74d81a6c | 1092 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 1093 | { |
66bdd22a | 1094 | struct channel *chan; |
74d81a6c MD |
1095 | |
1096 | chan = stream->chan->chan->chan; | |
ff0f5728 | 1097 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
74d81a6c MD |
1098 | chan, stream->handle, stream->cpu); |
1099 | } | |
1100 | ||
1101 | struct ustctl_consumer_stream * | |
1102 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
1103 | int cpu) | |
1104 | { | |
1105 | struct ustctl_consumer_stream *stream; | |
1106 | struct lttng_ust_shm_handle *handle; | |
1107 | struct channel *chan; | |
1108 | int shm_fd, wait_fd, wakeup_fd; | |
1109 | uint64_t memory_map_size; | |
4cfec15c | 1110 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
1111 | int ret; |
1112 | ||
74d81a6c MD |
1113 | if (!channel) |
1114 | return NULL; | |
1115 | handle = channel->chan->handle; | |
9bfc503d MD |
1116 | if (!handle) |
1117 | return NULL; | |
1118 | ||
74d81a6c | 1119 | chan = channel->chan->chan; |
6e922b24 | 1120 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
1121 | chan, cpu, handle, &shm_fd, &wait_fd, |
1122 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
1123 | if (!buf) |
1124 | return NULL; | |
74d81a6c | 1125 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1126 | if (ret) |
1127 | return NULL; | |
74d81a6c MD |
1128 | |
1129 | stream = zmalloc(sizeof(*stream)); | |
1130 | if (!stream) | |
1131 | goto alloc_error; | |
1132 | stream->handle = handle; | |
1133 | stream->buf = buf; | |
1134 | stream->chan = channel; | |
1135 | stream->shm_fd = shm_fd; | |
1136 | stream->wait_fd = wait_fd; | |
1137 | stream->wakeup_fd = wakeup_fd; | |
1138 | stream->memory_map_size = memory_map_size; | |
1139 | stream->cpu = cpu; | |
1140 | return stream; | |
1141 | ||
1142 | alloc_error: | |
1143 | return NULL; | |
1144 | } | |
1145 | ||
1146 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
1147 | { | |
1148 | struct lttng_ust_lib_ring_buffer *buf; | |
1149 | struct ustctl_consumer_channel *consumer_chan; | |
1150 | ||
1151 | assert(stream); | |
1152 | buf = stream->buf; | |
1153 | consumer_chan = stream->chan; | |
1154 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); | |
1155 | free(stream); | |
6e922b24 MD |
1156 | } |
1157 | ||
ff0f5728 MD |
1158 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan) |
1159 | { | |
1160 | if (!chan) | |
1161 | return -EINVAL; | |
1162 | return shm_get_wait_fd(chan->chan->handle, | |
1163 | &chan->chan->handle->chan._ref); | |
1164 | } | |
1165 | ||
1166 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan) | |
1167 | { | |
1168 | if (!chan) | |
1169 | return -EINVAL; | |
1170 | return shm_get_wakeup_fd(chan->chan->handle, | |
1171 | &chan->chan->handle->chan._ref); | |
1172 | } | |
1173 | ||
1174 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream) | |
6e922b24 | 1175 | { |
74d81a6c MD |
1176 | struct lttng_ust_lib_ring_buffer *buf; |
1177 | struct ustctl_consumer_channel *consumer_chan; | |
1178 | ||
1179 | if (!stream) | |
1180 | return -EINVAL; | |
1181 | buf = stream->buf; | |
1182 | consumer_chan = stream->chan; | |
1183 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
1184 | } | |
1185 | ||
ff0f5728 | 1186 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
74d81a6c MD |
1187 | { |
1188 | struct lttng_ust_lib_ring_buffer *buf; | |
1189 | struct ustctl_consumer_channel *consumer_chan; | |
1190 | ||
1191 | if (!stream) | |
1192 | return -EINVAL; | |
1193 | buf = stream->buf; | |
1194 | consumer_chan = stream->chan; | |
1195 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
1196 | } |
1197 | ||
57773204 MD |
1198 | /* For mmap mode, readable without "get" operation */ |
1199 | ||
74d81a6c | 1200 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 1201 | { |
74d81a6c MD |
1202 | struct lttng_ust_lib_ring_buffer *buf; |
1203 | struct ustctl_consumer_channel *consumer_chan; | |
1204 | ||
1205 | if (!stream) | |
9bfc503d | 1206 | return NULL; |
74d81a6c MD |
1207 | buf = stream->buf; |
1208 | consumer_chan = stream->chan; | |
1209 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1210 | } |
1211 | ||
57773204 | 1212 | /* returns the length to mmap. */ |
74d81a6c | 1213 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1214 | unsigned long *len) |
1215 | { | |
74d81a6c | 1216 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1217 | unsigned long mmap_buf_len; |
66bdd22a | 1218 | struct channel *chan; |
57773204 | 1219 | |
74d81a6c | 1220 | if (!stream) |
9bfc503d | 1221 | return -EINVAL; |
74d81a6c MD |
1222 | consumer_chan = stream->chan; |
1223 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1224 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1225 | return -EINVAL; | |
1226 | mmap_buf_len = chan->backend.buf_size; | |
1227 | if (chan->backend.extra_reader_sb) | |
1228 | mmap_buf_len += chan->backend.subbuf_size; | |
1229 | if (mmap_buf_len > INT_MAX) | |
1230 | return -EFBIG; | |
1231 | *len = mmap_buf_len; | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1236 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1237 | unsigned long *len) |
1238 | { | |
74d81a6c | 1239 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1240 | struct channel *chan; |
57773204 | 1241 | |
74d81a6c | 1242 | if (!stream) |
9bfc503d | 1243 | return -EINVAL; |
74d81a6c MD |
1244 | consumer_chan = stream->chan; |
1245 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1246 | *len = chan->backend.subbuf_size; |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | /* | |
1251 | * For mmap mode, operate on the current packet (between get/put or | |
1252 | * get_next/put_next). | |
1253 | */ | |
1254 | ||
1255 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1256 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1257 | unsigned long *off) | |
57773204 | 1258 | { |
66bdd22a | 1259 | struct channel *chan; |
57773204 | 1260 | unsigned long sb_bindex; |
74d81a6c MD |
1261 | struct lttng_ust_lib_ring_buffer *buf; |
1262 | struct ustctl_consumer_channel *consumer_chan; | |
57773204 | 1263 | |
74d81a6c | 1264 | if (!stream) |
9bfc503d | 1265 | return -EINVAL; |
74d81a6c MD |
1266 | buf = stream->buf; |
1267 | consumer_chan = stream->chan; | |
1268 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1269 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1270 | return -EINVAL; | |
1271 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1272 | buf->backend.buf_rsb.id); |
74d81a6c MD |
1273 | *off = shmp(consumer_chan->chan->handle, |
1274 | shmp_index(consumer_chan->chan->handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset; | |
57773204 MD |
1275 | return 0; |
1276 | } | |
1277 | ||
1278 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1279 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1280 | unsigned long *len) | |
57773204 | 1281 | { |
74d81a6c | 1282 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1283 | struct channel *chan; |
74d81a6c | 1284 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1285 | |
74d81a6c | 1286 | if (!stream) |
9bfc503d MD |
1287 | return -EINVAL; |
1288 | ||
74d81a6c MD |
1289 | buf = stream->buf; |
1290 | consumer_chan = stream->chan; | |
1291 | chan = consumer_chan->chan->chan; | |
57773204 | 1292 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1293 | consumer_chan->chan->handle); |
57773204 MD |
1294 | return 0; |
1295 | } | |
1296 | ||
1297 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1298 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1299 | unsigned long *len) | |
57773204 | 1300 | { |
74d81a6c | 1301 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1302 | struct channel *chan; |
74d81a6c | 1303 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1304 | |
74d81a6c | 1305 | if (!stream) |
9bfc503d | 1306 | return -EINVAL; |
74d81a6c MD |
1307 | buf = stream->buf; |
1308 | consumer_chan = stream->chan; | |
1309 | chan = consumer_chan->chan->chan; | |
57773204 | 1310 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1311 | consumer_chan->chan->handle); |
57773204 MD |
1312 | *len = PAGE_ALIGN(*len); |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1317 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1318 | { |
74d81a6c MD |
1319 | struct lttng_ust_lib_ring_buffer *buf; |
1320 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1321 | |
74d81a6c MD |
1322 | if (!stream) |
1323 | return -EINVAL; | |
1324 | buf = stream->buf; | |
1325 | consumer_chan = stream->chan; | |
1326 | return lib_ring_buffer_get_next_subbuf(buf, | |
1327 | consumer_chan->chan->handle); | |
57773204 MD |
1328 | } |
1329 | ||
1330 | ||
1331 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1332 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1333 | { |
74d81a6c MD |
1334 | struct lttng_ust_lib_ring_buffer *buf; |
1335 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1336 | |
74d81a6c MD |
1337 | if (!stream) |
1338 | return -EINVAL; | |
1339 | buf = stream->buf; | |
1340 | consumer_chan = stream->chan; | |
1341 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1342 | return 0; |
1343 | } | |
1344 | ||
1345 | /* snapshot */ | |
1346 | ||
1347 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1348 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1349 | { |
74d81a6c MD |
1350 | struct lttng_ust_lib_ring_buffer *buf; |
1351 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1352 | |
74d81a6c MD |
1353 | if (!stream) |
1354 | return -EINVAL; | |
1355 | buf = stream->buf; | |
1356 | consumer_chan = stream->chan; | |
57773204 | 1357 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1358 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1359 | } |
1360 | ||
1361 | /* Get the consumer position (iteration start) */ | |
74d81a6c MD |
1362 | int ustctl_snapshot_get_consumed(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->cons_snapshot; |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1375 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1376 | unsigned long *pos) | |
57773204 | 1377 | { |
74d81a6c | 1378 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1379 | |
74d81a6c MD |
1380 | if (!stream) |
1381 | return -EINVAL; | |
1382 | buf = stream->buf; | |
57773204 MD |
1383 | *pos = buf->prod_snapshot; |
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1388 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1389 | unsigned long *pos) | |
57773204 | 1390 | { |
74d81a6c MD |
1391 | struct lttng_ust_lib_ring_buffer *buf; |
1392 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1393 | |
74d81a6c MD |
1394 | if (!stream) |
1395 | return -EINVAL; | |
1396 | buf = stream->buf; | |
1397 | consumer_chan = stream->chan; | |
1398 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1399 | consumer_chan->chan->handle); | |
57773204 MD |
1400 | } |
1401 | ||
1402 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1403 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1404 | { |
74d81a6c MD |
1405 | struct lttng_ust_lib_ring_buffer *buf; |
1406 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1407 | |
74d81a6c MD |
1408 | if (!stream) |
1409 | return -EINVAL; | |
1410 | buf = stream->buf; | |
1411 | consumer_chan = stream->chan; | |
1412 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1413 | return 0; |
1414 | } | |
1415 | ||
74d81a6c | 1416 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1417 | int producer_active) |
57773204 | 1418 | { |
74d81a6c MD |
1419 | struct lttng_ust_lib_ring_buffer *buf; |
1420 | struct ustctl_consumer_channel *consumer_chan; | |
1421 | ||
1422 | assert(stream); | |
1423 | buf = stream->buf; | |
1424 | consumer_chan = stream->chan; | |
b52190f2 MD |
1425 | lib_ring_buffer_switch_slow(buf, |
1426 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1427 | consumer_chan->chan->handle); |
1428 | } | |
1429 | ||
32ce8569 MD |
1430 | /* |
1431 | * Returns 0 on success, negative error value on error. | |
1432 | */ | |
1433 | int ustctl_recv_reg_msg(int sock, | |
1434 | enum ustctl_socket_type *type, | |
1435 | uint32_t *major, | |
1436 | uint32_t *minor, | |
1437 | uint32_t *pid, | |
1438 | uint32_t *ppid, | |
1439 | uint32_t *uid, | |
1440 | uint32_t *gid, | |
1441 | uint32_t *bits_per_long, | |
1442 | uint32_t *uint8_t_alignment, | |
1443 | uint32_t *uint16_t_alignment, | |
1444 | uint32_t *uint32_t_alignment, | |
1445 | uint32_t *uint64_t_alignment, | |
1446 | uint32_t *long_alignment, | |
1447 | int *byte_order, | |
1448 | char *name) | |
1449 | { | |
1450 | ssize_t len; | |
1451 | struct ustctl_reg_msg reg_msg; | |
1452 | ||
1453 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
1454 | if (len > 0 && len != sizeof(reg_msg)) | |
1455 | return -EIO; | |
1456 | if (len == 0) | |
1457 | return -EPIPE; | |
1458 | if (len < 0) | |
1459 | return len; | |
1460 | ||
1461 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
1462 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1463 | BIG_ENDIAN : LITTLE_ENDIAN; | |
1464 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
1465 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1466 | LITTLE_ENDIAN : BIG_ENDIAN; | |
1467 | } else { | |
1468 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
1469 | } | |
1470 | switch (reg_msg.socket_type) { | |
1471 | case 0: *type = USTCTL_SOCKET_CMD; | |
1472 | break; | |
1473 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
1474 | break; | |
1475 | default: | |
1476 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
1477 | } | |
1478 | *major = reg_msg.major; | |
1479 | *minor = reg_msg.minor; | |
1480 | *pid = reg_msg.pid; | |
1481 | *ppid = reg_msg.ppid; | |
1482 | *uid = reg_msg.uid; | |
1483 | *gid = reg_msg.gid; | |
1484 | *bits_per_long = reg_msg.bits_per_long; | |
1485 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
1486 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
1487 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
1488 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
1489 | *long_alignment = reg_msg.long_alignment; | |
1490 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
1491 | if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) { | |
1492 | return -LTTNG_UST_ERR_UNSUP_MAJOR; | |
1493 | } | |
1494 | ||
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
1499 | { | |
1500 | struct ustcomm_notify_hdr header; | |
1501 | ssize_t len; | |
1502 | ||
1503 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
1504 | if (len > 0 && len != sizeof(header)) | |
1505 | return -EIO; | |
1506 | if (len == 0) | |
1507 | return -EPIPE; | |
1508 | if (len < 0) | |
1509 | return len; | |
1510 | switch (header.notify_cmd) { | |
1511 | case 0: | |
1512 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1513 | break; | |
1514 | case 1: | |
1515 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1516 | break; | |
1517 | default: | |
1518 | return -EINVAL; | |
1519 | } | |
1520 | return 0; | |
1521 | } | |
1522 | ||
1523 | /* | |
1524 | * Returns 0 on success, negative error value on error. | |
1525 | */ | |
1526 | int ustctl_recv_register_event(int sock, | |
1527 | int *session_objd, | |
1528 | int *channel_objd, | |
1529 | char *event_name, | |
1530 | int *loglevel, | |
1531 | char **signature, | |
1532 | size_t *nr_fields, | |
1533 | struct ustctl_field **fields, | |
1534 | char **model_emf_uri) | |
1535 | { | |
1536 | ssize_t len; | |
1537 | struct ustcomm_notify_event_msg msg; | |
1538 | size_t signature_len, fields_len, model_emf_uri_len; | |
1539 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
1540 | struct ustctl_field *a_fields = NULL; | |
1541 | ||
1542 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1543 | if (len > 0 && len != sizeof(msg)) | |
1544 | return -EIO; | |
1545 | if (len == 0) | |
1546 | return -EPIPE; | |
1547 | if (len < 0) | |
1548 | return len; | |
1549 | ||
1550 | *session_objd = msg.session_objd; | |
1551 | *channel_objd = msg.channel_objd; | |
1552 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1553 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1554 | *loglevel = msg.loglevel; | |
1555 | signature_len = msg.signature_len; | |
1556 | fields_len = msg.fields_len; | |
1557 | ||
1558 | if (fields_len % sizeof(*a_fields) != 0) { | |
1559 | return -EINVAL; | |
1560 | } | |
1561 | ||
1562 | model_emf_uri_len = msg.model_emf_uri_len; | |
1563 | ||
1564 | /* recv signature. contains at least \0. */ | |
1565 | a_sign = zmalloc(signature_len); | |
1566 | if (!a_sign) | |
1567 | return -ENOMEM; | |
1568 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
1569 | if (len > 0 && len != signature_len) { | |
1570 | len = -EIO; | |
1571 | goto signature_error; | |
1572 | } | |
1573 | if (len == 0) { | |
1574 | len = -EPIPE; | |
1575 | goto signature_error; | |
1576 | } | |
1577 | if (len < 0) { | |
1578 | goto signature_error; | |
1579 | } | |
1580 | /* Enforce end of string */ | |
111198c2 | 1581 | a_sign[signature_len - 1] = '\0'; |
32ce8569 MD |
1582 | |
1583 | /* recv fields */ | |
1584 | if (fields_len) { | |
1585 | a_fields = zmalloc(fields_len); | |
1586 | if (!a_fields) { | |
1587 | len = -ENOMEM; | |
1588 | goto signature_error; | |
1589 | } | |
1590 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1591 | if (len > 0 && len != fields_len) { | |
1592 | len = -EIO; | |
1593 | goto fields_error; | |
1594 | } | |
1595 | if (len == 0) { | |
1596 | len = -EPIPE; | |
1597 | goto fields_error; | |
1598 | } | |
1599 | if (len < 0) { | |
1600 | goto fields_error; | |
1601 | } | |
1602 | } | |
1603 | ||
1604 | if (model_emf_uri_len) { | |
1605 | /* recv model_emf_uri_len */ | |
1606 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
1607 | if (!a_model_emf_uri) { | |
1608 | len = -ENOMEM; | |
1609 | goto fields_error; | |
1610 | } | |
1611 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
1612 | model_emf_uri_len); | |
1613 | if (len > 0 && len != model_emf_uri_len) { | |
1614 | len = -EIO; | |
1615 | goto model_error; | |
1616 | } | |
1617 | if (len == 0) { | |
1618 | len = -EPIPE; | |
1619 | goto model_error; | |
1620 | } | |
1621 | if (len < 0) { | |
1622 | goto model_error; | |
1623 | } | |
1624 | /* Enforce end of string */ | |
1625 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
1626 | } | |
1627 | ||
1628 | *signature = a_sign; | |
1629 | *nr_fields = fields_len / sizeof(*a_fields); | |
1630 | *fields = a_fields; | |
1631 | *model_emf_uri = a_model_emf_uri; | |
1632 | ||
1633 | return 0; | |
1634 | ||
1635 | model_error: | |
1636 | free(a_model_emf_uri); | |
1637 | fields_error: | |
1638 | free(a_fields); | |
1639 | signature_error: | |
1640 | free(a_sign); | |
1641 | return len; | |
1642 | } | |
1643 | ||
1644 | /* | |
1645 | * Returns 0 on success, negative error value on error. | |
1646 | */ | |
1647 | int ustctl_reply_register_event(int sock, | |
1648 | uint32_t id, | |
1649 | int ret_code) | |
1650 | { | |
1651 | ssize_t len; | |
1652 | struct { | |
1653 | struct ustcomm_notify_hdr header; | |
1654 | struct ustcomm_notify_event_reply r; | |
1655 | } reply; | |
1656 | ||
1657 | memset(&reply, 0, sizeof(reply)); | |
1658 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1659 | reply.r.ret_code = ret_code; | |
1660 | reply.r.event_id = id; | |
1661 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1662 | if (len > 0 && len != sizeof(reply)) | |
1663 | return -EIO; | |
1664 | if (len < 0) | |
1665 | return len; | |
1666 | return 0; | |
1667 | } | |
1668 | ||
1669 | /* | |
1670 | * Returns 0 on success, negative UST or system error value on error. | |
1671 | */ | |
1672 | int ustctl_recv_register_channel(int sock, | |
1673 | int *session_objd, /* session descriptor (output) */ | |
1674 | int *channel_objd, /* channel descriptor (output) */ | |
1675 | size_t *nr_fields, | |
1676 | struct ustctl_field **fields) | |
1677 | { | |
1678 | ssize_t len; | |
1679 | struct ustcomm_notify_channel_msg msg; | |
1680 | size_t fields_len; | |
1681 | struct ustctl_field *a_fields; | |
1682 | ||
1683 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1684 | if (len > 0 && len != sizeof(msg)) | |
1685 | return -EIO; | |
1686 | if (len == 0) | |
1687 | return -EPIPE; | |
1688 | if (len < 0) | |
1689 | return len; | |
1690 | ||
1691 | *session_objd = msg.session_objd; | |
1692 | *channel_objd = msg.channel_objd; | |
1693 | fields_len = msg.ctx_fields_len; | |
1694 | ||
1695 | if (fields_len % sizeof(*a_fields) != 0) { | |
1696 | return -EINVAL; | |
1697 | } | |
1698 | ||
1699 | /* recv fields */ | |
1700 | if (fields_len) { | |
1701 | a_fields = zmalloc(fields_len); | |
1702 | if (!a_fields) { | |
1703 | len = -ENOMEM; | |
1704 | goto alloc_error; | |
1705 | } | |
1706 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1707 | if (len > 0 && len != fields_len) { | |
1708 | len = -EIO; | |
1709 | goto fields_error; | |
1710 | } | |
1711 | if (len == 0) { | |
1712 | len = -EPIPE; | |
1713 | goto fields_error; | |
1714 | } | |
1715 | if (len < 0) { | |
1716 | goto fields_error; | |
1717 | } | |
1718 | *fields = a_fields; | |
1719 | } else { | |
1720 | *fields = NULL; | |
1721 | } | |
1722 | *nr_fields = fields_len / sizeof(*a_fields); | |
1723 | return 0; | |
1724 | ||
1725 | fields_error: | |
1726 | free(a_fields); | |
1727 | alloc_error: | |
1728 | return len; | |
1729 | } | |
1730 | ||
1731 | /* | |
1732 | * Returns 0 on success, negative error value on error. | |
1733 | */ | |
1734 | int ustctl_reply_register_channel(int sock, | |
1735 | uint32_t chan_id, | |
1736 | enum ustctl_channel_header header_type, | |
1737 | int ret_code) | |
1738 | { | |
1739 | ssize_t len; | |
1740 | struct { | |
1741 | struct ustcomm_notify_hdr header; | |
1742 | struct ustcomm_notify_channel_reply r; | |
1743 | } reply; | |
1744 | ||
1745 | memset(&reply, 0, sizeof(reply)); | |
1746 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1747 | reply.r.ret_code = ret_code; | |
1748 | reply.r.chan_id = chan_id; | |
1749 | switch (header_type) { | |
1750 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
1751 | reply.r.header_type = 1; | |
1752 | break; | |
1753 | case USTCTL_CHANNEL_HEADER_LARGE: | |
1754 | reply.r.header_type = 2; | |
1755 | break; | |
1756 | default: | |
1757 | reply.r.header_type = 0; | |
1758 | break; | |
1759 | } | |
1760 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1761 | if (len > 0 && len != sizeof(reply)) | |
1762 | return -EIO; | |
1763 | if (len < 0) | |
1764 | return len; | |
1765 | return 0; | |
1766 | } | |
1767 | ||
74d81a6c MD |
1768 | static __attribute__((constructor)) |
1769 | void ustctl_init(void) | |
1770 | { | |
1771 | init_usterr(); | |
1772 | lttng_ring_buffer_metadata_client_init(); | |
1773 | lttng_ring_buffer_client_overwrite_init(); | |
34a91bdb | 1774 | lttng_ring_buffer_client_overwrite_rt_init(); |
74d81a6c | 1775 | lttng_ring_buffer_client_discard_init(); |
34a91bdb | 1776 | lttng_ring_buffer_client_discard_rt_init(); |
03d2d293 | 1777 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
1778 | } |
1779 | ||
1780 | static __attribute__((destructor)) | |
1781 | void ustctl_exit(void) | |
1782 | { | |
34a91bdb | 1783 | lttng_ring_buffer_client_discard_rt_exit(); |
74d81a6c | 1784 | lttng_ring_buffer_client_discard_exit(); |
34a91bdb | 1785 | lttng_ring_buffer_client_overwrite_rt_exit(); |
74d81a6c MD |
1786 | lttng_ring_buffer_client_overwrite_exit(); |
1787 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 1788 | } |