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 |
fb31eb73 FD |
20 | #include <byteswap.h> |
21 | #include <stdint.h> | |
57773204 | 22 | #include <string.h> |
fb31eb73 | 23 | #include <sys/mman.h> |
4e79769f | 24 | #include <unistd.h> |
fb31eb73 | 25 | |
c62a3816 | 26 | #include <lttng/ust-config.h> |
4318ae1b MD |
27 | #include <lttng/ust-ctl.h> |
28 | #include <lttng/ust-abi.h> | |
c1fca457 | 29 | #include <lttng/ust-events.h> |
44c72f10 | 30 | #include <usterr-signal-safe.h> |
b728d87e | 31 | #include <ust-comm.h> |
74d81a6c | 32 | #include <helper.h> |
57773204 MD |
33 | |
34 | #include "../libringbuffer/backend.h" | |
35 | #include "../libringbuffer/frontend.h" | |
c9023c93 | 36 | #include "../liblttng-ust/wait.h" |
b2f3252a | 37 | #include "../liblttng-ust/lttng-rb-clients.h" |
f9364363 | 38 | #include "../liblttng-ust/clock.h" |
92ce256d | 39 | #include "../liblttng-ust/getenv.h" |
c9023c93 MD |
40 | |
41 | /* | |
42 | * Number of milliseconds to retry before failing metadata writes on | |
43 | * buffer full condition. (10 seconds) | |
44 | */ | |
45 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 | |
57773204 | 46 | |
74d81a6c MD |
47 | /* |
48 | * Channel representation within consumer. | |
49 | */ | |
50 | struct ustctl_consumer_channel { | |
51 | struct lttng_channel *chan; /* lttng channel buffers */ | |
6b120308 | 52 | |
74d81a6c MD |
53 | /* initial attributes */ |
54 | struct ustctl_consumer_channel_attr attr; | |
ff0f5728 MD |
55 | int wait_fd; /* monitor close() */ |
56 | int wakeup_fd; /* monitor close() */ | |
74d81a6c MD |
57 | }; |
58 | ||
59 | /* | |
60 | * Stream representation within consumer. | |
61 | */ | |
62 | struct ustctl_consumer_stream { | |
63 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
64 | struct lttng_ust_lib_ring_buffer *buf; | |
65 | struct ustctl_consumer_channel *chan; | |
66 | int shm_fd, wait_fd, wakeup_fd; | |
67 | int cpu; | |
68 | uint64_t memory_map_size; | |
69 | }; | |
70 | ||
71 | extern void lttng_ring_buffer_client_overwrite_init(void); | |
08a3170c | 72 | extern void lttng_ring_buffer_client_overwrite_rt_init(void); |
74d81a6c | 73 | extern void lttng_ring_buffer_client_discard_init(void); |
08a3170c | 74 | extern void lttng_ring_buffer_client_discard_rt_init(void); |
74d81a6c MD |
75 | extern void lttng_ring_buffer_metadata_client_init(void); |
76 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
08a3170c | 77 | extern void lttng_ring_buffer_client_overwrite_rt_exit(void); |
74d81a6c | 78 | extern void lttng_ring_buffer_client_discard_exit(void); |
08a3170c | 79 | extern void lttng_ring_buffer_client_discard_rt_exit(void); |
74d81a6c MD |
80 | extern void lttng_ring_buffer_metadata_client_exit(void); |
81 | ||
2be0e72c MD |
82 | int ustctl_release_handle(int sock, int handle) |
83 | { | |
84 | struct ustcomm_ust_msg lum; | |
85 | struct ustcomm_ust_reply lur; | |
2be0e72c | 86 | |
74d81a6c MD |
87 | if (sock < 0 || handle < 0) |
88 | return 0; | |
89 | memset(&lum, 0, sizeof(lum)); | |
90 | lum.handle = handle; | |
91 | lum.cmd = LTTNG_UST_RELEASE; | |
92 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 93 | } |
74d81a6c | 94 | |
12388166 MD |
95 | /* |
96 | * If sock is negative, it means we don't have to notify the other side | |
97 | * (e.g. application has already vanished). | |
98 | */ | |
d26228ae | 99 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 100 | { |
57773204 MD |
101 | int ret; |
102 | ||
9bfc503d MD |
103 | if (!data) |
104 | return -EINVAL; | |
105 | ||
74d81a6c MD |
106 | switch (data->type) { |
107 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
ff0f5728 MD |
108 | if (data->u.channel.wakeup_fd >= 0) { |
109 | ret = close(data->u.channel.wakeup_fd); | |
110 | if (ret < 0) { | |
111 | ret = -errno; | |
112 | return ret; | |
113 | } | |
114 | } | |
74d81a6c MD |
115 | free(data->u.channel.data); |
116 | break; | |
117 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
118 | if (data->u.stream.shm_fd >= 0) { | |
119 | ret = close(data->u.stream.shm_fd); | |
120 | if (ret < 0) { | |
121 | ret = -errno; | |
122 | return ret; | |
123 | } | |
d26228ae | 124 | } |
74d81a6c MD |
125 | if (data->u.stream.wakeup_fd >= 0) { |
126 | ret = close(data->u.stream.wakeup_fd); | |
127 | if (ret < 0) { | |
128 | ret = -errno; | |
129 | return ret; | |
130 | } | |
d26228ae | 131 | } |
74d81a6c | 132 | break; |
32ce8569 MD |
133 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
134 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
d5fc3224 FD |
135 | case LTTNG_UST_OBJECT_TYPE_TRIGGER_GROUP: |
136 | case LTTNG_UST_OBJECT_TYPE_TRIGGER: | |
32ce8569 | 137 | break; |
74d81a6c MD |
138 | default: |
139 | assert(0); | |
d26228ae | 140 | } |
2be0e72c | 141 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
142 | } |
143 | ||
1c5e467e MD |
144 | /* |
145 | * Send registration done packet to the application. | |
146 | */ | |
147 | int ustctl_register_done(int sock) | |
148 | { | |
149 | struct ustcomm_ust_msg lum; | |
150 | struct ustcomm_ust_reply lur; | |
151 | int ret; | |
152 | ||
153 | DBG("Sending register done command to %d", sock); | |
154 | memset(&lum, 0, sizeof(lum)); | |
155 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
156 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
157 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
158 | if (ret) | |
159 | return ret; | |
1c5e467e | 160 | return 0; |
1c5e467e MD |
161 | } |
162 | ||
57773204 MD |
163 | /* |
164 | * returns session handle. | |
165 | */ | |
166 | int ustctl_create_session(int sock) | |
167 | { | |
168 | struct ustcomm_ust_msg lum; | |
169 | struct ustcomm_ust_reply lur; | |
170 | int ret, session_handle; | |
171 | ||
172 | /* Create session */ | |
173 | memset(&lum, 0, sizeof(lum)); | |
174 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
175 | lum.cmd = LTTNG_UST_SESSION; | |
176 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
177 | if (ret) | |
178 | return ret; | |
179 | session_handle = lur.ret_val; | |
180 | DBG("received session handle %u", session_handle); | |
181 | return session_handle; | |
182 | } | |
183 | ||
57773204 | 184 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
185 | struct lttng_ust_object_data *channel_data, |
186 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
187 | { |
188 | struct ustcomm_ust_msg lum; | |
189 | struct ustcomm_ust_reply lur; | |
61f02aea | 190 | struct lttng_ust_object_data *event_data; |
57773204 MD |
191 | int ret; |
192 | ||
9bfc503d MD |
193 | if (!channel_data || !_event_data) |
194 | return -EINVAL; | |
195 | ||
74d81a6c | 196 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
197 | if (!event_data) |
198 | return -ENOMEM; | |
32ce8569 | 199 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
200 | memset(&lum, 0, sizeof(lum)); |
201 | lum.handle = channel_data->handle; | |
202 | lum.cmd = LTTNG_UST_EVENT; | |
203 | strncpy(lum.u.event.name, ev->name, | |
204 | LTTNG_UST_SYM_NAME_LEN); | |
205 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
206 | lum.u.event.loglevel_type = ev->loglevel_type; |
207 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
208 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
209 | if (ret) { | |
210 | free(event_data); | |
211 | return ret; | |
212 | } | |
213 | event_data->handle = lur.ret_val; | |
214 | DBG("received event handle %u", event_data->handle); | |
215 | *_event_data = event_data; | |
216 | return 0; | |
217 | } | |
218 | ||
53f0df51 | 219 | int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
61f02aea MD |
220 | struct lttng_ust_object_data *obj_data, |
221 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
222 | { |
223 | struct ustcomm_ust_msg lum; | |
224 | struct ustcomm_ust_reply lur; | |
53f0df51 JG |
225 | struct lttng_ust_object_data *context_data = NULL; |
226 | char *buf = NULL; | |
227 | size_t len; | |
57773204 MD |
228 | int ret; |
229 | ||
53f0df51 JG |
230 | if (!obj_data || !_context_data) { |
231 | ret = -EINVAL; | |
232 | goto end; | |
233 | } | |
9bfc503d | 234 | |
74d81a6c | 235 | context_data = zmalloc(sizeof(*context_data)); |
53f0df51 JG |
236 | if (!context_data) { |
237 | ret = -ENOMEM; | |
238 | goto end; | |
239 | } | |
32ce8569 | 240 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 241 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 242 | lum.handle = obj_data->handle; |
57773204 | 243 | lum.cmd = LTTNG_UST_CONTEXT; |
53f0df51 JG |
244 | |
245 | lum.u.context.ctx = ctx->ctx; | |
246 | switch (ctx->ctx) { | |
247 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
248 | lum.u.context.u.perf_counter = ctx->u.perf_counter; | |
249 | break; | |
250 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
251 | { | |
252 | size_t provider_name_len = strlen( | |
253 | ctx->u.app_ctx.provider_name) + 1; | |
254 | size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1; | |
255 | ||
256 | lum.u.context.u.app_ctx.provider_name_len = provider_name_len; | |
257 | lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len; | |
258 | ||
259 | len = provider_name_len + ctx_name_len; | |
260 | buf = zmalloc(len); | |
261 | if (!buf) { | |
262 | ret = -ENOMEM; | |
263 | goto end; | |
264 | } | |
265 | memcpy(buf, ctx->u.app_ctx.provider_name, | |
266 | provider_name_len); | |
267 | memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name, | |
268 | ctx_name_len); | |
269 | break; | |
270 | } | |
271 | default: | |
272 | break; | |
273 | } | |
274 | ret = ustcomm_send_app_msg(sock, &lum); | |
275 | if (ret) | |
276 | goto end; | |
277 | if (buf) { | |
278 | /* send var len ctx_name */ | |
279 | ret = ustcomm_send_unix_sock(sock, buf, len); | |
280 | if (ret < 0) { | |
281 | goto end; | |
282 | } | |
283 | if (ret != len) { | |
284 | ret = -EINVAL; | |
285 | goto end; | |
286 | } | |
287 | } | |
288 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
289 | if (ret < 0) { | |
290 | goto end; | |
57773204 | 291 | } |
32ce8569 MD |
292 | context_data->handle = -1; |
293 | DBG("Context created successfully"); | |
57773204 | 294 | *_context_data = context_data; |
53f0df51 JG |
295 | context_data = NULL; |
296 | end: | |
297 | free(context_data); | |
298 | free(buf); | |
57773204 MD |
299 | return ret; |
300 | } | |
301 | ||
cd54f6d9 MD |
302 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
303 | struct lttng_ust_object_data *obj_data) | |
304 | { | |
305 | struct ustcomm_ust_msg lum; | |
306 | struct ustcomm_ust_reply lur; | |
307 | int ret; | |
308 | ||
309 | if (!obj_data) | |
310 | return -EINVAL; | |
311 | ||
312 | memset(&lum, 0, sizeof(lum)); | |
313 | lum.handle = obj_data->handle; | |
314 | lum.cmd = LTTNG_UST_FILTER; | |
315 | lum.u.filter.data_size = bytecode->len; | |
316 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 317 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
318 | |
319 | ret = ustcomm_send_app_msg(sock, &lum); | |
320 | if (ret) | |
321 | return ret; | |
cd54f6d9 MD |
322 | /* send var len bytecode */ |
323 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
324 | bytecode->len); | |
325 | if (ret < 0) { | |
326 | return ret; | |
327 | } | |
7bc53e94 MD |
328 | if (ret != bytecode->len) |
329 | return -EINVAL; | |
330 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
331 | } |
332 | ||
da57c034 JI |
333 | int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion, |
334 | struct lttng_ust_object_data *obj_data) | |
335 | { | |
336 | struct ustcomm_ust_msg lum; | |
337 | struct ustcomm_ust_reply lur; | |
338 | int ret; | |
339 | ||
340 | if (!obj_data) { | |
341 | return -EINVAL; | |
342 | } | |
343 | ||
344 | memset(&lum, 0, sizeof(lum)); | |
345 | lum.handle = obj_data->handle; | |
346 | lum.cmd = LTTNG_UST_EXCLUSION; | |
347 | lum.u.exclusion.count = exclusion->count; | |
348 | ||
349 | ret = ustcomm_send_app_msg(sock, &lum); | |
350 | if (ret) { | |
351 | return ret; | |
352 | } | |
353 | ||
1628366f | 354 | /* send var len exclusion names */ |
da57c034 JI |
355 | ret = ustcomm_send_unix_sock(sock, |
356 | exclusion->names, | |
357 | exclusion->count * LTTNG_UST_SYM_NAME_LEN); | |
358 | if (ret < 0) { | |
359 | return ret; | |
360 | } | |
361 | if (ret != exclusion->count * LTTNG_UST_SYM_NAME_LEN) { | |
362 | return -EINVAL; | |
363 | } | |
364 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
365 | } | |
366 | ||
57773204 | 367 | /* Enable event, channel and session ioctl */ |
61f02aea | 368 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
369 | { |
370 | struct ustcomm_ust_msg lum; | |
371 | struct ustcomm_ust_reply lur; | |
372 | int ret; | |
373 | ||
9bfc503d MD |
374 | if (!object) |
375 | return -EINVAL; | |
376 | ||
57773204 MD |
377 | memset(&lum, 0, sizeof(lum)); |
378 | lum.handle = object->handle; | |
379 | lum.cmd = LTTNG_UST_ENABLE; | |
380 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
381 | if (ret) | |
382 | return ret; | |
383 | DBG("enabled handle %u", object->handle); | |
384 | return 0; | |
385 | } | |
386 | ||
387 | /* Disable event, channel and session ioctl */ | |
61f02aea | 388 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
389 | { |
390 | struct ustcomm_ust_msg lum; | |
391 | struct ustcomm_ust_reply lur; | |
392 | int ret; | |
393 | ||
9bfc503d MD |
394 | if (!object) |
395 | return -EINVAL; | |
396 | ||
57773204 MD |
397 | memset(&lum, 0, sizeof(lum)); |
398 | lum.handle = object->handle; | |
399 | lum.cmd = LTTNG_UST_DISABLE; | |
400 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
401 | if (ret) | |
402 | return ret; | |
403 | DBG("disable handle %u", object->handle); | |
404 | return 0; | |
405 | } | |
406 | ||
4a6ca058 | 407 | int ustctl_start_session(int sock, int handle) |
57773204 | 408 | { |
61f02aea | 409 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
410 | |
411 | obj.handle = handle; | |
412 | return ustctl_enable(sock, &obj); | |
57773204 MD |
413 | } |
414 | ||
4a6ca058 | 415 | int ustctl_stop_session(int sock, int handle) |
57773204 | 416 | { |
61f02aea | 417 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
418 | |
419 | obj.handle = handle; | |
420 | return ustctl_disable(sock, &obj); | |
57773204 MD |
421 | } |
422 | ||
d5fc3224 FD |
423 | int ustctl_create_trigger_group(int sock, int pipe_fd, |
424 | struct lttng_ust_object_data **_trigger_group_data) | |
425 | { | |
426 | struct lttng_ust_object_data *trigger_group_data; | |
427 | struct ustcomm_ust_msg lum; | |
428 | struct ustcomm_ust_reply lur; | |
429 | ssize_t len; | |
430 | int ret; | |
431 | ||
432 | if (!_trigger_group_data) | |
433 | return -EINVAL; | |
434 | ||
435 | trigger_group_data = zmalloc(sizeof(*trigger_group_data)); | |
436 | if (!trigger_group_data) | |
437 | return -ENOMEM; | |
438 | ||
439 | trigger_group_data->type = LTTNG_UST_OBJECT_TYPE_TRIGGER_GROUP; | |
440 | ||
441 | memset(&lum, 0, sizeof(lum)); | |
442 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
443 | lum.cmd = LTTNG_UST_TRIGGER_GROUP_CREATE; | |
444 | ||
445 | ret = ustcomm_send_app_msg(sock, &lum); | |
446 | if (ret) { | |
447 | return ret; | |
448 | } | |
449 | ||
450 | /* Send trigger notification pipe. */ | |
451 | len = ustcomm_send_fds_unix_sock(sock, &pipe_fd, 1); | |
452 | if (len <= 0) { | |
453 | return ret; | |
454 | } | |
455 | ||
456 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
457 | if (ret) { | |
458 | return ret; | |
459 | } | |
460 | ||
461 | trigger_group_data->handle = lur.ret_val; | |
462 | DBG("received trigger group handle %d", trigger_group_data->handle); | |
463 | ||
464 | *_trigger_group_data = trigger_group_data; | |
465 | return 0; | |
466 | } | |
467 | ||
468 | int ustctl_create_trigger(int sock, struct lttng_ust_trigger *trigger, | |
469 | struct lttng_ust_object_data *trigger_group, | |
470 | struct lttng_ust_object_data **_trigger_data) | |
471 | { | |
472 | struct ustcomm_ust_msg lum; | |
473 | struct ustcomm_ust_reply lur; | |
474 | struct lttng_ust_object_data *trigger_data; | |
475 | int ret; | |
476 | ||
477 | if (!trigger_group || !_trigger_data) | |
478 | return -EINVAL; | |
479 | ||
480 | trigger_data = zmalloc(sizeof(*trigger_data)); | |
481 | if (!trigger_data) | |
482 | return -ENOMEM; | |
483 | ||
484 | trigger_data->type = LTTNG_UST_OBJECT_TYPE_TRIGGER; | |
485 | ||
486 | memset(&lum, 0, sizeof(lum)); | |
487 | lum.handle = trigger_group->handle; | |
488 | lum.cmd = LTTNG_UST_TRIGGER_CREATE; | |
489 | ||
490 | strncpy(lum.u.trigger.name, trigger->name, | |
491 | LTTNG_UST_SYM_NAME_LEN); | |
492 | lum.u.trigger.instrumentation = trigger->instrumentation; | |
493 | lum.u.trigger.loglevel_type = trigger->loglevel_type; | |
494 | lum.u.trigger.loglevel = trigger->loglevel; | |
495 | lum.u.trigger.id = trigger->id; | |
496 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
497 | if (ret) { | |
498 | free(trigger_data); | |
499 | return ret; | |
500 | } | |
501 | trigger_data->handle = lur.ret_val; | |
502 | DBG("received event handle %u", trigger_data->handle); | |
503 | *_trigger_data = trigger_data; | |
504 | ||
505 | return ret; | |
506 | } | |
507 | ||
57773204 MD |
508 | int ustctl_tracepoint_list(int sock) |
509 | { | |
b115631f MD |
510 | struct ustcomm_ust_msg lum; |
511 | struct ustcomm_ust_reply lur; | |
512 | int ret, tp_list_handle; | |
513 | ||
514 | memset(&lum, 0, sizeof(lum)); | |
515 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
516 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
517 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
518 | if (ret) | |
519 | return ret; | |
520 | tp_list_handle = lur.ret_val; | |
521 | DBG("received tracepoint list handle %u", tp_list_handle); | |
522 | return tp_list_handle; | |
523 | } | |
524 | ||
525 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 526 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
527 | { |
528 | struct ustcomm_ust_msg lum; | |
529 | struct ustcomm_ust_reply lur; | |
530 | int ret; | |
531 | ||
9bfc503d MD |
532 | if (!iter) |
533 | return -EINVAL; | |
534 | ||
b115631f MD |
535 | memset(&lum, 0, sizeof(lum)); |
536 | lum.handle = tp_list_handle; | |
537 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
538 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
539 | if (ret) | |
540 | return ret; | |
882a56d7 | 541 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 542 | lur.u.tracepoint.name, |
882a56d7 | 543 | lur.u.tracepoint.loglevel); |
cbef6901 | 544 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 545 | return 0; |
57773204 MD |
546 | } |
547 | ||
40003310 MD |
548 | int ustctl_tracepoint_field_list(int sock) |
549 | { | |
550 | struct ustcomm_ust_msg lum; | |
551 | struct ustcomm_ust_reply lur; | |
552 | int ret, tp_field_list_handle; | |
553 | ||
554 | memset(&lum, 0, sizeof(lum)); | |
555 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
556 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
557 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
558 | if (ret) | |
559 | return ret; | |
560 | tp_field_list_handle = lur.ret_val; | |
561 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
562 | return tp_field_list_handle; | |
563 | } | |
564 | ||
565 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
566 | struct lttng_ust_field_iter *iter) | |
567 | { | |
568 | struct ustcomm_ust_msg lum; | |
569 | struct ustcomm_ust_reply lur; | |
570 | int ret; | |
571 | ssize_t len; | |
572 | ||
573 | if (!iter) | |
574 | return -EINVAL; | |
575 | ||
576 | memset(&lum, 0, sizeof(lum)); | |
577 | lum.handle = tp_field_list_handle; | |
578 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
579 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
580 | if (ret) | |
581 | return ret; | |
582 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
583 | if (len != sizeof(*iter)) { | |
584 | return -EINVAL; | |
585 | } | |
586 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
587 | iter->event_name, | |
588 | iter->loglevel, | |
589 | iter->field_name, | |
590 | iter->type); | |
591 | return 0; | |
592 | } | |
593 | ||
57773204 MD |
594 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
595 | { | |
596 | struct ustcomm_ust_msg lum; | |
597 | struct ustcomm_ust_reply lur; | |
598 | int ret; | |
599 | ||
9bfc503d MD |
600 | if (!v) |
601 | return -EINVAL; | |
602 | ||
57773204 MD |
603 | memset(&lum, 0, sizeof(lum)); |
604 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
605 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
606 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
607 | if (ret) | |
608 | return ret; | |
609 | memcpy(v, &lur.u.version, sizeof(*v)); | |
610 | DBG("received tracer version"); | |
611 | return 0; | |
612 | } | |
613 | ||
614 | int ustctl_wait_quiescent(int sock) | |
615 | { | |
616 | struct ustcomm_ust_msg lum; | |
617 | struct ustcomm_ust_reply lur; | |
618 | int ret; | |
619 | ||
620 | memset(&lum, 0, sizeof(lum)); | |
621 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
622 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
623 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
624 | if (ret) | |
625 | return ret; | |
626 | DBG("waited for quiescent state"); | |
627 | return 0; | |
628 | } | |
629 | ||
630 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
631 | { | |
9bfc503d MD |
632 | if (!calibrate) |
633 | return -EINVAL; | |
634 | ||
57773204 MD |
635 | return -ENOSYS; |
636 | } | |
637 | ||
f1fffc57 MD |
638 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
639 | { | |
640 | struct ustcomm_ust_msg lum; | |
641 | struct ustcomm_ust_reply lur; | |
642 | int ret; | |
643 | ||
9bfc503d MD |
644 | if (!object) |
645 | return -EINVAL; | |
646 | ||
f1fffc57 MD |
647 | memset(&lum, 0, sizeof(lum)); |
648 | lum.handle = object->handle; | |
649 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
650 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
651 | if (ret) | |
652 | return ret; | |
653 | DBG("flushed buffer handle %u", object->handle); | |
654 | return 0; | |
655 | } | |
656 | ||
74d81a6c MD |
657 | static |
658 | int ustctl_send_channel(int sock, | |
659 | enum lttng_ust_chan_type type, | |
660 | void *data, | |
661 | uint64_t size, | |
ff0f5728 | 662 | int wakeup_fd, |
74d81a6c MD |
663 | int send_fd_only) |
664 | { | |
665 | ssize_t len; | |
666 | ||
667 | if (!send_fd_only) { | |
668 | /* Send mmap size */ | |
669 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
670 | if (len != sizeof(size)) { | |
671 | if (len < 0) | |
672 | return len; | |
673 | else | |
674 | return -EIO; | |
675 | } | |
676 | ||
677 | /* Send channel type */ | |
678 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
679 | if (len != sizeof(type)) { | |
680 | if (len < 0) | |
681 | return len; | |
682 | else | |
683 | return -EIO; | |
684 | } | |
685 | } | |
686 | ||
687 | /* Send channel data */ | |
688 | len = ustcomm_send_unix_sock(sock, data, size); | |
689 | if (len != size) { | |
690 | if (len < 0) | |
691 | return len; | |
692 | else | |
693 | return -EIO; | |
694 | } | |
57773204 | 695 | |
ff0f5728 MD |
696 | /* Send wakeup fd */ |
697 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
698 | if (len <= 0) { | |
699 | if (len < 0) | |
700 | return len; | |
701 | else | |
702 | return -EIO; | |
703 | } | |
74d81a6c MD |
704 | return 0; |
705 | } | |
706 | ||
707 | static | |
708 | int ustctl_send_stream(int sock, | |
709 | uint32_t stream_nr, | |
710 | uint64_t memory_map_size, | |
711 | int shm_fd, int wakeup_fd, | |
712 | int send_fd_only) | |
57773204 | 713 | { |
74d81a6c MD |
714 | ssize_t len; |
715 | int fds[2]; | |
716 | ||
717 | if (!send_fd_only) { | |
718 | if (shm_fd < 0) { | |
719 | /* finish iteration */ | |
720 | uint64_t v = -1; | |
721 | ||
722 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
723 | if (len != sizeof(v)) { | |
724 | if (len < 0) | |
725 | return len; | |
726 | else | |
727 | return -EIO; | |
728 | } | |
729 | return 0; | |
730 | } | |
731 | ||
732 | /* Send mmap size */ | |
733 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
734 | sizeof(memory_map_size)); | |
735 | if (len != sizeof(memory_map_size)) { | |
736 | if (len < 0) | |
737 | return len; | |
738 | else | |
739 | return -EIO; | |
740 | } | |
741 | ||
742 | /* Send stream nr */ | |
743 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
744 | sizeof(stream_nr)); | |
745 | if (len != sizeof(stream_nr)) { | |
746 | if (len < 0) | |
747 | return len; | |
748 | else | |
749 | return -EIO; | |
750 | } | |
751 | } | |
752 | ||
753 | /* Send shm fd and wakeup fd */ | |
754 | fds[0] = shm_fd; | |
755 | fds[1] = wakeup_fd; | |
756 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
757 | if (len <= 0) { | |
758 | if (len < 0) | |
759 | return len; | |
760 | else | |
761 | return -EIO; | |
762 | } | |
763 | return 0; | |
764 | } | |
765 | ||
766 | int ustctl_recv_channel_from_consumer(int sock, | |
767 | struct lttng_ust_object_data **_channel_data) | |
768 | { | |
769 | struct lttng_ust_object_data *channel_data; | |
770 | ssize_t len; | |
ff0f5728 | 771 | int wakeup_fd; |
7a784989 | 772 | int ret; |
57773204 | 773 | |
74d81a6c MD |
774 | channel_data = zmalloc(sizeof(*channel_data)); |
775 | if (!channel_data) { | |
776 | ret = -ENOMEM; | |
777 | goto error_alloc; | |
778 | } | |
779 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
12f3dabc | 780 | channel_data->handle = -1; |
74d81a6c MD |
781 | |
782 | /* recv mmap size */ | |
783 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
784 | sizeof(channel_data->size)); | |
785 | if (len != sizeof(channel_data->size)) { | |
786 | if (len < 0) | |
787 | ret = len; | |
788 | else | |
789 | ret = -EINVAL; | |
790 | goto error; | |
791 | } | |
9bfc503d | 792 | |
74d81a6c MD |
793 | /* recv channel type */ |
794 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
795 | sizeof(channel_data->u.channel.type)); | |
796 | if (len != sizeof(channel_data->u.channel.type)) { | |
797 | if (len < 0) | |
798 | ret = len; | |
799 | else | |
800 | ret = -EINVAL; | |
801 | goto error; | |
802 | } | |
803 | ||
804 | /* recv channel data */ | |
805 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
806 | if (!channel_data->u.channel.data) { | |
807 | ret = -ENOMEM; | |
808 | goto error; | |
809 | } | |
810 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
811 | channel_data->size); | |
812 | if (len != channel_data->size) { | |
813 | if (len < 0) | |
814 | ret = len; | |
815 | else | |
816 | ret = -EINVAL; | |
817 | goto error_recv_data; | |
818 | } | |
ff0f5728 MD |
819 | /* recv wakeup fd */ |
820 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
821 | if (len <= 0) { | |
822 | if (len < 0) { | |
823 | ret = len; | |
824 | goto error_recv_data; | |
825 | } else { | |
826 | ret = -EIO; | |
827 | goto error_recv_data; | |
828 | } | |
829 | } | |
830 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
831 | *_channel_data = channel_data; |
832 | return 0; | |
833 | ||
834 | error_recv_data: | |
835 | free(channel_data->u.channel.data); | |
836 | error: | |
837 | free(channel_data); | |
838 | error_alloc: | |
839 | return ret; | |
840 | } | |
841 | ||
842 | int ustctl_recv_stream_from_consumer(int sock, | |
843 | struct lttng_ust_object_data **_stream_data) | |
844 | { | |
845 | struct lttng_ust_object_data *stream_data; | |
846 | ssize_t len; | |
847 | int ret; | |
848 | int fds[2]; | |
849 | ||
850 | stream_data = zmalloc(sizeof(*stream_data)); | |
851 | if (!stream_data) { | |
852 | ret = -ENOMEM; | |
853 | goto error_alloc; | |
57773204 | 854 | } |
74d81a6c MD |
855 | |
856 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
857 | stream_data->handle = -1; | |
858 | ||
859 | /* recv mmap size */ | |
860 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
861 | sizeof(stream_data->size)); | |
862 | if (len != sizeof(stream_data->size)) { | |
863 | if (len < 0) | |
864 | ret = len; | |
865 | else | |
866 | ret = -EINVAL; | |
867 | goto error; | |
868 | } | |
869 | if (stream_data->size == -1) { | |
870 | ret = -LTTNG_UST_ERR_NOENT; | |
871 | goto error; | |
872 | } | |
873 | ||
874 | /* recv stream nr */ | |
875 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
876 | sizeof(stream_data->u.stream.stream_nr)); | |
877 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
878 | if (len < 0) | |
879 | ret = len; | |
880 | else | |
881 | ret = -EINVAL; | |
882 | goto error; | |
883 | } | |
884 | ||
885 | /* recv shm fd and wakeup fd */ | |
886 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
887 | if (len <= 0) { | |
888 | if (len < 0) { | |
889 | ret = len; | |
890 | goto error; | |
891 | } else { | |
892 | ret = -EIO; | |
893 | goto error; | |
0bfe09ec | 894 | } |
0bfe09ec | 895 | } |
74d81a6c MD |
896 | stream_data->u.stream.shm_fd = fds[0]; |
897 | stream_data->u.stream.wakeup_fd = fds[1]; | |
898 | *_stream_data = stream_data; | |
899 | return 0; | |
0bfe09ec | 900 | |
74d81a6c MD |
901 | error: |
902 | free(stream_data); | |
903 | error_alloc: | |
904 | return ret; | |
905 | } | |
906 | ||
907 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
908 | struct lttng_ust_object_data *channel_data) | |
909 | { | |
910 | struct ustcomm_ust_msg lum; | |
911 | struct ustcomm_ust_reply lur; | |
912 | int ret; | |
913 | ||
914 | if (!channel_data) | |
915 | return -EINVAL; | |
916 | ||
917 | memset(&lum, 0, sizeof(lum)); | |
918 | lum.handle = session_handle; | |
919 | lum.cmd = LTTNG_UST_CHANNEL; | |
920 | lum.u.channel.len = channel_data->size; | |
921 | lum.u.channel.type = channel_data->u.channel.type; | |
922 | ret = ustcomm_send_app_msg(sock, &lum); | |
923 | if (ret) | |
924 | return ret; | |
925 | ||
926 | ret = ustctl_send_channel(sock, | |
927 | channel_data->u.channel.type, | |
928 | channel_data->u.channel.data, | |
929 | channel_data->size, | |
ff0f5728 | 930 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
931 | 1); |
932 | if (ret) | |
933 | return ret; | |
934 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
935 | if (!ret) { | |
7f2348b8 | 936 | channel_data->handle = lur.ret_val; |
57773204 | 937 | } |
74d81a6c MD |
938 | return ret; |
939 | } | |
940 | ||
941 | int ustctl_send_stream_to_ust(int sock, | |
942 | struct lttng_ust_object_data *channel_data, | |
943 | struct lttng_ust_object_data *stream_data) | |
944 | { | |
945 | struct ustcomm_ust_msg lum; | |
946 | struct ustcomm_ust_reply lur; | |
947 | int ret; | |
948 | ||
949 | memset(&lum, 0, sizeof(lum)); | |
950 | lum.handle = channel_data->handle; | |
951 | lum.cmd = LTTNG_UST_STREAM; | |
952 | lum.u.stream.len = stream_data->size; | |
953 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
954 | ret = ustcomm_send_app_msg(sock, &lum); | |
955 | if (ret) | |
956 | return ret; | |
957 | ||
958 | assert(stream_data); | |
959 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
960 | ||
961 | ret = ustctl_send_stream(sock, | |
962 | stream_data->u.stream.stream_nr, | |
963 | stream_data->size, | |
964 | stream_data->u.stream.shm_fd, | |
965 | stream_data->u.stream.wakeup_fd, 1); | |
966 | if (ret) | |
967 | return ret; | |
968 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
969 | } | |
970 | ||
12f3dabc MD |
971 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, |
972 | struct lttng_ust_object_data *src) | |
973 | { | |
974 | struct lttng_ust_object_data *obj; | |
975 | int ret; | |
976 | ||
977 | if (src->handle != -1) { | |
978 | ret = -EINVAL; | |
979 | goto error; | |
980 | } | |
981 | ||
982 | obj = zmalloc(sizeof(*obj)); | |
983 | if (!obj) { | |
984 | ret = -ENOMEM; | |
985 | goto error; | |
986 | } | |
987 | ||
988 | obj->type = src->type; | |
989 | obj->handle = src->handle; | |
990 | obj->size = src->size; | |
991 | ||
992 | switch (obj->type) { | |
993 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
994 | { | |
995 | obj->u.channel.type = src->u.channel.type; | |
996 | if (src->u.channel.wakeup_fd >= 0) { | |
997 | obj->u.channel.wakeup_fd = | |
998 | dup(src->u.channel.wakeup_fd); | |
999 | if (obj->u.channel.wakeup_fd < 0) { | |
1000 | ret = errno; | |
1001 | goto chan_error_wakeup_fd; | |
1002 | } | |
1003 | } else { | |
1004 | obj->u.channel.wakeup_fd = | |
1005 | src->u.channel.wakeup_fd; | |
1006 | } | |
1007 | obj->u.channel.data = zmalloc(obj->size); | |
1008 | if (!obj->u.channel.data) { | |
1009 | ret = -ENOMEM; | |
1010 | goto chan_error_alloc; | |
1011 | } | |
1012 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
1013 | break; | |
1014 | ||
1015 | chan_error_alloc: | |
1016 | if (src->u.channel.wakeup_fd >= 0) { | |
1017 | int closeret; | |
1018 | ||
1019 | closeret = close(obj->u.channel.wakeup_fd); | |
1020 | if (closeret) { | |
1021 | PERROR("close"); | |
1022 | } | |
1023 | } | |
1024 | chan_error_wakeup_fd: | |
1025 | goto error_type; | |
1026 | ||
1027 | } | |
1028 | ||
1029 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
1030 | { | |
1031 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
1032 | if (src->u.stream.wakeup_fd >= 0) { | |
1033 | obj->u.stream.wakeup_fd = | |
1034 | dup(src->u.stream.wakeup_fd); | |
1035 | if (obj->u.stream.wakeup_fd < 0) { | |
1036 | ret = errno; | |
1037 | goto stream_error_wakeup_fd; | |
1038 | } | |
1039 | } else { | |
1040 | obj->u.stream.wakeup_fd = | |
1041 | src->u.stream.wakeup_fd; | |
1042 | } | |
1043 | ||
1044 | if (src->u.stream.shm_fd >= 0) { | |
1045 | obj->u.stream.shm_fd = | |
1046 | dup(src->u.stream.shm_fd); | |
1047 | if (obj->u.stream.shm_fd < 0) { | |
1048 | ret = errno; | |
1049 | goto stream_error_shm_fd; | |
1050 | } | |
1051 | } else { | |
1052 | obj->u.stream.shm_fd = | |
1053 | src->u.stream.shm_fd; | |
1054 | } | |
1055 | break; | |
1056 | ||
1057 | stream_error_shm_fd: | |
1058 | if (src->u.stream.wakeup_fd >= 0) { | |
1059 | int closeret; | |
1060 | ||
1061 | closeret = close(obj->u.stream.wakeup_fd); | |
1062 | if (closeret) { | |
1063 | PERROR("close"); | |
1064 | } | |
1065 | } | |
1066 | stream_error_wakeup_fd: | |
1067 | goto error_type; | |
1068 | } | |
1069 | ||
1070 | default: | |
1071 | ret = -EINVAL; | |
1072 | goto error_type; | |
1073 | } | |
1074 | ||
1075 | *dest = obj; | |
1076 | return 0; | |
1077 | ||
1078 | error_type: | |
1079 | free(obj); | |
1080 | error: | |
1081 | return ret; | |
1082 | } | |
1083 | ||
74d81a6c MD |
1084 | |
1085 | /* Buffer operations */ | |
1086 | ||
5ea386c3 MD |
1087 | int ustctl_get_nr_stream_per_channel(void) |
1088 | { | |
1089 | return num_possible_cpus(); | |
1090 | } | |
1091 | ||
74d81a6c | 1092 | struct ustctl_consumer_channel * |
5ea386c3 MD |
1093 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr, |
1094 | const int *stream_fds, int nr_stream_fds) | |
74d81a6c MD |
1095 | { |
1096 | struct ustctl_consumer_channel *chan; | |
1097 | const char *transport_name; | |
1098 | struct lttng_transport *transport; | |
1099 | ||
1100 | switch (attr->type) { | |
1101 | case LTTNG_UST_CHAN_PER_CPU: | |
1102 | if (attr->output == LTTNG_UST_MMAP) { | |
34a91bdb MD |
1103 | if (attr->overwrite) { |
1104 | if (attr->read_timer_interval == 0) { | |
1105 | transport_name = "relay-overwrite-mmap"; | |
1106 | } else { | |
1107 | transport_name = "relay-overwrite-rt-mmap"; | |
1108 | } | |
1109 | } else { | |
1110 | if (attr->read_timer_interval == 0) { | |
1111 | transport_name = "relay-discard-mmap"; | |
1112 | } else { | |
1113 | transport_name = "relay-discard-rt-mmap"; | |
1114 | } | |
1115 | } | |
74d81a6c MD |
1116 | } else { |
1117 | return NULL; | |
1118 | } | |
c1fca457 | 1119 | break; |
74d81a6c MD |
1120 | case LTTNG_UST_CHAN_METADATA: |
1121 | if (attr->output == LTTNG_UST_MMAP) | |
1122 | transport_name = "relay-metadata-mmap"; | |
1123 | else | |
1124 | return NULL; | |
c1fca457 MD |
1125 | break; |
1126 | default: | |
74d81a6c | 1127 | transport_name = "<unknown>"; |
c1fca457 MD |
1128 | return NULL; |
1129 | } | |
74d81a6c MD |
1130 | |
1131 | transport = lttng_transport_find(transport_name); | |
1132 | if (!transport) { | |
1133 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 1134 | transport_name); |
74d81a6c | 1135 | return NULL; |
7a784989 | 1136 | } |
74d81a6c MD |
1137 | |
1138 | chan = zmalloc(sizeof(*chan)); | |
1139 | if (!chan) | |
1140 | return NULL; | |
1141 | ||
1142 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 1143 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 1144 | attr->switch_timer_interval, |
32ce8569 | 1145 | attr->read_timer_interval, |
a9ff648c | 1146 | attr->uuid, attr->chan_id, |
b2c5f61a MD |
1147 | stream_fds, nr_stream_fds, |
1148 | attr->blocking_timeout); | |
74d81a6c MD |
1149 | if (!chan->chan) { |
1150 | goto chan_error; | |
1151 | } | |
1152 | chan->chan->ops = &transport->ops; | |
1153 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
cb7378b3 MD |
1154 | chan->wait_fd = ustctl_channel_get_wait_fd(chan); |
1155 | chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
1156 | return chan; |
1157 | ||
1158 | chan_error: | |
1159 | free(chan); | |
1160 | return NULL; | |
57773204 MD |
1161 | } |
1162 | ||
74d81a6c | 1163 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 1164 | { |
b24e4e91 MD |
1165 | (void) ustctl_channel_close_wait_fd(chan); |
1166 | (void) ustctl_channel_close_wakeup_fd(chan); | |
74d81a6c MD |
1167 | chan->chan->ops->channel_destroy(chan->chan); |
1168 | free(chan); | |
1169 | } | |
1170 | ||
1171 | int ustctl_send_channel_to_sessiond(int sock, | |
1172 | struct ustctl_consumer_channel *channel) | |
1173 | { | |
1174 | struct shm_object_table *table; | |
57773204 | 1175 | |
74d81a6c MD |
1176 | table = channel->chan->handle->table; |
1177 | if (table->size <= 0) | |
9bfc503d | 1178 | return -EINVAL; |
74d81a6c MD |
1179 | return ustctl_send_channel(sock, |
1180 | channel->attr.type, | |
1181 | table->objects[0].memory_map, | |
1182 | table->objects[0].memory_map_size, | |
ff0f5728 | 1183 | channel->wakeup_fd, |
74d81a6c MD |
1184 | 0); |
1185 | } | |
9bfc503d | 1186 | |
74d81a6c MD |
1187 | int ustctl_send_stream_to_sessiond(int sock, |
1188 | struct ustctl_consumer_stream *stream) | |
1189 | { | |
1190 | if (!stream) | |
1191 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
1192 | ||
1193 | return ustctl_send_stream(sock, | |
1194 | stream->cpu, | |
1195 | stream->memory_map_size, | |
1196 | stream->shm_fd, stream->wakeup_fd, | |
1197 | 0); | |
57773204 MD |
1198 | } |
1199 | ||
c9023c93 MD |
1200 | int ustctl_write_metadata_to_channel( |
1201 | struct ustctl_consumer_channel *channel, | |
1202 | const char *metadata_str, /* NOT null-terminated */ | |
1203 | size_t len) /* metadata length */ | |
1204 | { | |
1205 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1206 | struct lttng_channel *chan = channel->chan; | |
1207 | const char *str = metadata_str; | |
1208 | int ret = 0, waitret; | |
1209 | size_t reserve_len, pos; | |
1210 | ||
1211 | for (pos = 0; pos < len; pos += reserve_len) { | |
1212 | reserve_len = min_t(size_t, | |
1213 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1214 | len - pos); | |
1215 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1216 | sizeof(char), -1, chan->handle, NULL); |
c9023c93 MD |
1217 | /* |
1218 | * We don't care about metadata buffer's records lost | |
1219 | * count, because we always retry here. Report error if | |
1220 | * we need to bail out after timeout or being | |
1221 | * interrupted. | |
1222 | */ | |
1223 | waitret = wait_cond_interruptible_timeout( | |
1224 | ({ | |
1225 | ret = chan->ops->event_reserve(&ctx, 0); | |
1226 | ret != -ENOBUFS || !ret; | |
1227 | }), | |
1228 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1229 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1230 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1231 | waitret == -EINTR ? "interrupted" : | |
1232 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1233 | if (waitret == -EINTR) | |
1234 | ret = waitret; | |
1235 | goto end; | |
1236 | } | |
1237 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
1238 | chan->ops->event_commit(&ctx); | |
1239 | } | |
1240 | end: | |
1241 | return ret; | |
1242 | } | |
1243 | ||
3ef94b0e JD |
1244 | /* |
1245 | * Write at most one packet in the channel. | |
1246 | * Returns the number of bytes written on success, < 0 on error. | |
1247 | */ | |
1248 | ssize_t ustctl_write_one_packet_to_channel( | |
1249 | struct ustctl_consumer_channel *channel, | |
1250 | const char *metadata_str, /* NOT null-terminated */ | |
1251 | size_t len) /* metadata length */ | |
1252 | { | |
1253 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1254 | struct lttng_channel *chan = channel->chan; | |
1255 | const char *str = metadata_str; | |
1256 | ssize_t reserve_len; | |
1257 | int ret; | |
1258 | ||
1259 | reserve_len = min_t(ssize_t, | |
1260 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1261 | len); | |
1262 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1263 | sizeof(char), -1, chan->handle, NULL); |
3ef94b0e JD |
1264 | ret = chan->ops->event_reserve(&ctx, 0); |
1265 | if (ret != 0) { | |
1266 | DBG("LTTng: event reservation failed"); | |
1267 | assert(ret < 0); | |
1268 | reserve_len = ret; | |
1269 | goto end; | |
1270 | } | |
1271 | chan->ops->event_write(&ctx, str, reserve_len); | |
1272 | chan->ops->event_commit(&ctx); | |
1273 | ||
1274 | end: | |
1275 | return reserve_len; | |
1276 | } | |
1277 | ||
ff0f5728 MD |
1278 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan) |
1279 | { | |
1280 | struct channel *chan; | |
cb7378b3 | 1281 | int ret; |
ff0f5728 MD |
1282 | |
1283 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1284 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
ff0f5728 | 1285 | chan, chan->handle); |
cb7378b3 MD |
1286 | if (!ret) |
1287 | consumer_chan->wait_fd = -1; | |
1288 | return ret; | |
ff0f5728 MD |
1289 | } |
1290 | ||
1291 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan) | |
1292 | { | |
1293 | struct channel *chan; | |
cb7378b3 | 1294 | int ret; |
ff0f5728 MD |
1295 | |
1296 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1297 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1298 | chan, chan->handle); |
cb7378b3 MD |
1299 | if (!ret) |
1300 | consumer_chan->wakeup_fd = -1; | |
1301 | return ret; | |
ff0f5728 MD |
1302 | } |
1303 | ||
74d81a6c | 1304 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
1305 | { |
1306 | struct channel *chan; | |
1307 | ||
74d81a6c | 1308 | chan = stream->chan->chan->chan; |
ff0f5728 | 1309 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
74d81a6c | 1310 | chan, stream->handle, stream->cpu); |
5224b5c8 MD |
1311 | } |
1312 | ||
74d81a6c | 1313 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 1314 | { |
66bdd22a | 1315 | struct channel *chan; |
74d81a6c MD |
1316 | |
1317 | chan = stream->chan->chan->chan; | |
ff0f5728 | 1318 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
74d81a6c MD |
1319 | chan, stream->handle, stream->cpu); |
1320 | } | |
1321 | ||
1322 | struct ustctl_consumer_stream * | |
1323 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
1324 | int cpu) | |
1325 | { | |
1326 | struct ustctl_consumer_stream *stream; | |
1327 | struct lttng_ust_shm_handle *handle; | |
1328 | struct channel *chan; | |
1329 | int shm_fd, wait_fd, wakeup_fd; | |
1330 | uint64_t memory_map_size; | |
4cfec15c | 1331 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
1332 | int ret; |
1333 | ||
74d81a6c MD |
1334 | if (!channel) |
1335 | return NULL; | |
1336 | handle = channel->chan->handle; | |
9bfc503d MD |
1337 | if (!handle) |
1338 | return NULL; | |
1339 | ||
74d81a6c | 1340 | chan = channel->chan->chan; |
6e922b24 | 1341 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
1342 | chan, cpu, handle, &shm_fd, &wait_fd, |
1343 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
1344 | if (!buf) |
1345 | return NULL; | |
74d81a6c | 1346 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1347 | if (ret) |
1348 | return NULL; | |
74d81a6c MD |
1349 | |
1350 | stream = zmalloc(sizeof(*stream)); | |
1351 | if (!stream) | |
1352 | goto alloc_error; | |
1353 | stream->handle = handle; | |
1354 | stream->buf = buf; | |
1355 | stream->chan = channel; | |
1356 | stream->shm_fd = shm_fd; | |
1357 | stream->wait_fd = wait_fd; | |
1358 | stream->wakeup_fd = wakeup_fd; | |
1359 | stream->memory_map_size = memory_map_size; | |
1360 | stream->cpu = cpu; | |
1361 | return stream; | |
1362 | ||
1363 | alloc_error: | |
1364 | return NULL; | |
1365 | } | |
1366 | ||
1367 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
1368 | { | |
1369 | struct lttng_ust_lib_ring_buffer *buf; | |
1370 | struct ustctl_consumer_channel *consumer_chan; | |
1371 | ||
1372 | assert(stream); | |
1373 | buf = stream->buf; | |
1374 | consumer_chan = stream->chan; | |
b24e4e91 MD |
1375 | (void) ustctl_stream_close_wait_fd(stream); |
1376 | (void) ustctl_stream_close_wakeup_fd(stream); | |
74d81a6c MD |
1377 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); |
1378 | free(stream); | |
6e922b24 MD |
1379 | } |
1380 | ||
ff0f5728 MD |
1381 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan) |
1382 | { | |
1383 | if (!chan) | |
1384 | return -EINVAL; | |
1385 | return shm_get_wait_fd(chan->chan->handle, | |
1386 | &chan->chan->handle->chan._ref); | |
1387 | } | |
1388 | ||
1389 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan) | |
1390 | { | |
1391 | if (!chan) | |
1392 | return -EINVAL; | |
1393 | return shm_get_wakeup_fd(chan->chan->handle, | |
1394 | &chan->chan->handle->chan._ref); | |
1395 | } | |
1396 | ||
1397 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream) | |
6e922b24 | 1398 | { |
74d81a6c MD |
1399 | struct lttng_ust_lib_ring_buffer *buf; |
1400 | struct ustctl_consumer_channel *consumer_chan; | |
1401 | ||
1402 | if (!stream) | |
1403 | return -EINVAL; | |
1404 | buf = stream->buf; | |
1405 | consumer_chan = stream->chan; | |
1406 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
1407 | } | |
1408 | ||
ff0f5728 | 1409 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
74d81a6c MD |
1410 | { |
1411 | struct lttng_ust_lib_ring_buffer *buf; | |
1412 | struct ustctl_consumer_channel *consumer_chan; | |
1413 | ||
1414 | if (!stream) | |
1415 | return -EINVAL; | |
1416 | buf = stream->buf; | |
1417 | consumer_chan = stream->chan; | |
1418 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
1419 | } |
1420 | ||
57773204 MD |
1421 | /* For mmap mode, readable without "get" operation */ |
1422 | ||
74d81a6c | 1423 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 1424 | { |
74d81a6c MD |
1425 | struct lttng_ust_lib_ring_buffer *buf; |
1426 | struct ustctl_consumer_channel *consumer_chan; | |
1427 | ||
1428 | if (!stream) | |
9bfc503d | 1429 | return NULL; |
74d81a6c MD |
1430 | buf = stream->buf; |
1431 | consumer_chan = stream->chan; | |
1432 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1433 | } |
1434 | ||
57773204 | 1435 | /* returns the length to mmap. */ |
74d81a6c | 1436 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1437 | unsigned long *len) |
1438 | { | |
74d81a6c | 1439 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1440 | unsigned long mmap_buf_len; |
66bdd22a | 1441 | struct channel *chan; |
57773204 | 1442 | |
74d81a6c | 1443 | if (!stream) |
9bfc503d | 1444 | return -EINVAL; |
74d81a6c MD |
1445 | consumer_chan = stream->chan; |
1446 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1447 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1448 | return -EINVAL; | |
1449 | mmap_buf_len = chan->backend.buf_size; | |
1450 | if (chan->backend.extra_reader_sb) | |
1451 | mmap_buf_len += chan->backend.subbuf_size; | |
1452 | if (mmap_buf_len > INT_MAX) | |
1453 | return -EFBIG; | |
1454 | *len = mmap_buf_len; | |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1459 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1460 | unsigned long *len) |
1461 | { | |
74d81a6c | 1462 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1463 | struct channel *chan; |
57773204 | 1464 | |
74d81a6c | 1465 | if (!stream) |
9bfc503d | 1466 | return -EINVAL; |
74d81a6c MD |
1467 | consumer_chan = stream->chan; |
1468 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1469 | *len = chan->backend.subbuf_size; |
1470 | return 0; | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * For mmap mode, operate on the current packet (between get/put or | |
1475 | * get_next/put_next). | |
1476 | */ | |
1477 | ||
1478 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1479 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1480 | unsigned long *off) | |
57773204 | 1481 | { |
66bdd22a | 1482 | struct channel *chan; |
57773204 | 1483 | unsigned long sb_bindex; |
74d81a6c MD |
1484 | struct lttng_ust_lib_ring_buffer *buf; |
1485 | struct ustctl_consumer_channel *consumer_chan; | |
34daae3e MD |
1486 | struct lttng_ust_lib_ring_buffer_backend_pages_shmp *barray_idx; |
1487 | struct lttng_ust_lib_ring_buffer_backend_pages *pages; | |
57773204 | 1488 | |
74d81a6c | 1489 | if (!stream) |
9bfc503d | 1490 | return -EINVAL; |
74d81a6c MD |
1491 | buf = stream->buf; |
1492 | consumer_chan = stream->chan; | |
1493 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1494 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1495 | return -EINVAL; | |
1496 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1497 | buf->backend.buf_rsb.id); |
34daae3e MD |
1498 | barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array, |
1499 | sb_bindex); | |
1500 | if (!barray_idx) | |
1501 | return -EINVAL; | |
1502 | pages = shmp(consumer_chan->chan->handle, barray_idx->shmp); | |
1503 | if (!pages) | |
1504 | return -EINVAL; | |
1505 | *off = pages->mmap_offset; | |
57773204 MD |
1506 | return 0; |
1507 | } | |
1508 | ||
1509 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1510 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1511 | unsigned long *len) | |
57773204 | 1512 | { |
74d81a6c | 1513 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1514 | struct channel *chan; |
74d81a6c | 1515 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1516 | |
74d81a6c | 1517 | if (!stream) |
9bfc503d MD |
1518 | return -EINVAL; |
1519 | ||
74d81a6c MD |
1520 | buf = stream->buf; |
1521 | consumer_chan = stream->chan; | |
1522 | chan = consumer_chan->chan->chan; | |
57773204 | 1523 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1524 | consumer_chan->chan->handle); |
57773204 MD |
1525 | return 0; |
1526 | } | |
1527 | ||
1528 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1529 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1530 | unsigned long *len) | |
57773204 | 1531 | { |
74d81a6c | 1532 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1533 | struct channel *chan; |
74d81a6c | 1534 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1535 | |
74d81a6c | 1536 | if (!stream) |
9bfc503d | 1537 | return -EINVAL; |
74d81a6c MD |
1538 | buf = stream->buf; |
1539 | consumer_chan = stream->chan; | |
1540 | chan = consumer_chan->chan->chan; | |
57773204 | 1541 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1542 | consumer_chan->chan->handle); |
57773204 MD |
1543 | *len = PAGE_ALIGN(*len); |
1544 | return 0; | |
1545 | } | |
1546 | ||
1547 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1548 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1549 | { |
74d81a6c MD |
1550 | struct lttng_ust_lib_ring_buffer *buf; |
1551 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1552 | |
74d81a6c MD |
1553 | if (!stream) |
1554 | return -EINVAL; | |
1555 | buf = stream->buf; | |
1556 | consumer_chan = stream->chan; | |
1557 | return lib_ring_buffer_get_next_subbuf(buf, | |
1558 | consumer_chan->chan->handle); | |
57773204 MD |
1559 | } |
1560 | ||
1561 | ||
1562 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1563 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1564 | { |
74d81a6c MD |
1565 | struct lttng_ust_lib_ring_buffer *buf; |
1566 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1567 | |
74d81a6c MD |
1568 | if (!stream) |
1569 | return -EINVAL; | |
1570 | buf = stream->buf; | |
1571 | consumer_chan = stream->chan; | |
1572 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1573 | return 0; |
1574 | } | |
1575 | ||
1576 | /* snapshot */ | |
1577 | ||
1578 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1579 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1580 | { |
74d81a6c MD |
1581 | struct lttng_ust_lib_ring_buffer *buf; |
1582 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1583 | |
74d81a6c MD |
1584 | if (!stream) |
1585 | return -EINVAL; | |
1586 | buf = stream->buf; | |
1587 | consumer_chan = stream->chan; | |
57773204 | 1588 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1589 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1590 | } |
1591 | ||
f45930b7 JG |
1592 | /* |
1593 | * Get a snapshot of the current ring buffer producer and consumer positions | |
1594 | * even if the consumed and produced positions are contained within the same | |
1595 | * subbuffer. | |
1596 | */ | |
1597 | int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream) | |
1598 | { | |
1599 | struct lttng_ust_lib_ring_buffer *buf; | |
1600 | struct ustctl_consumer_channel *consumer_chan; | |
1601 | ||
1602 | if (!stream) | |
1603 | return -EINVAL; | |
1604 | buf = stream->buf; | |
1605 | consumer_chan = stream->chan; | |
1606 | return lib_ring_buffer_snapshot_sample_positions(buf, | |
1607 | &buf->cons_snapshot, &buf->prod_snapshot, | |
1608 | consumer_chan->chan->handle); | |
1609 | } | |
1610 | ||
57773204 | 1611 | /* Get the consumer position (iteration start) */ |
74d81a6c MD |
1612 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1613 | unsigned long *pos) | |
57773204 | 1614 | { |
74d81a6c | 1615 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1616 | |
74d81a6c MD |
1617 | if (!stream) |
1618 | return -EINVAL; | |
1619 | buf = stream->buf; | |
57773204 MD |
1620 | *pos = buf->cons_snapshot; |
1621 | return 0; | |
1622 | } | |
1623 | ||
1624 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1625 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1626 | unsigned long *pos) | |
57773204 | 1627 | { |
74d81a6c | 1628 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1629 | |
74d81a6c MD |
1630 | if (!stream) |
1631 | return -EINVAL; | |
1632 | buf = stream->buf; | |
57773204 MD |
1633 | *pos = buf->prod_snapshot; |
1634 | return 0; | |
1635 | } | |
1636 | ||
1637 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1638 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1639 | unsigned long *pos) | |
57773204 | 1640 | { |
74d81a6c MD |
1641 | struct lttng_ust_lib_ring_buffer *buf; |
1642 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1643 | |
74d81a6c MD |
1644 | if (!stream) |
1645 | return -EINVAL; | |
1646 | buf = stream->buf; | |
1647 | consumer_chan = stream->chan; | |
1648 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1649 | consumer_chan->chan->handle); | |
57773204 MD |
1650 | } |
1651 | ||
1652 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1653 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1654 | { |
74d81a6c MD |
1655 | struct lttng_ust_lib_ring_buffer *buf; |
1656 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1657 | |
74d81a6c MD |
1658 | if (!stream) |
1659 | return -EINVAL; | |
1660 | buf = stream->buf; | |
1661 | consumer_chan = stream->chan; | |
1662 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1663 | return 0; |
1664 | } | |
1665 | ||
74d81a6c | 1666 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1667 | int producer_active) |
57773204 | 1668 | { |
74d81a6c MD |
1669 | struct lttng_ust_lib_ring_buffer *buf; |
1670 | struct ustctl_consumer_channel *consumer_chan; | |
1671 | ||
1672 | assert(stream); | |
1673 | buf = stream->buf; | |
1674 | consumer_chan = stream->chan; | |
b52190f2 MD |
1675 | lib_ring_buffer_switch_slow(buf, |
1676 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1677 | consumer_chan->chan->handle); |
1678 | } | |
1679 | ||
beca55a1 MD |
1680 | void ustctl_clear_buffer(struct ustctl_consumer_stream *stream) |
1681 | { | |
1682 | struct lttng_ust_lib_ring_buffer *buf; | |
1683 | struct ustctl_consumer_channel *consumer_chan; | |
1684 | ||
1685 | assert(stream); | |
1686 | buf = stream->buf; | |
1687 | consumer_chan = stream->chan; | |
1688 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, | |
1689 | consumer_chan->chan->handle); | |
1690 | lib_ring_buffer_clear_reader(buf, consumer_chan->chan->handle); | |
1691 | } | |
1692 | ||
b2f3252a JD |
1693 | static |
1694 | struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb( | |
1695 | struct lttng_ust_lib_ring_buffer *buf, | |
1696 | struct lttng_ust_shm_handle *handle) | |
1697 | { | |
1698 | struct channel *chan; | |
1699 | const struct lttng_ust_lib_ring_buffer_config *config; | |
1700 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1701 | ||
1702 | chan = shmp(handle, buf->backend.chan); | |
34daae3e MD |
1703 | if (!chan) |
1704 | return NULL; | |
b2f3252a JD |
1705 | config = &chan->backend.config; |
1706 | if (!config->cb_ptr) | |
1707 | return NULL; | |
1708 | client_cb = caa_container_of(config->cb_ptr, | |
1709 | struct lttng_ust_client_lib_ring_buffer_client_cb, | |
1710 | parent); | |
1711 | return client_cb; | |
1712 | } | |
1713 | ||
1714 | int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream, | |
1715 | uint64_t *timestamp_begin) | |
1716 | { | |
1717 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1718 | struct lttng_ust_lib_ring_buffer *buf; |
1719 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1720 | |
1721 | if (!stream || !timestamp_begin) | |
1722 | return -EINVAL; | |
e1919a41 MD |
1723 | buf = stream->buf; |
1724 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1725 | client_cb = get_client_cb(buf, handle); |
1726 | if (!client_cb) | |
1727 | return -ENOSYS; | |
1728 | return client_cb->timestamp_begin(buf, handle, timestamp_begin); | |
1729 | } | |
1730 | ||
1731 | int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream, | |
1732 | uint64_t *timestamp_end) | |
1733 | { | |
1734 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1735 | struct lttng_ust_lib_ring_buffer *buf; |
1736 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1737 | |
1738 | if (!stream || !timestamp_end) | |
1739 | return -EINVAL; | |
e1919a41 MD |
1740 | buf = stream->buf; |
1741 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1742 | client_cb = get_client_cb(buf, handle); |
1743 | if (!client_cb) | |
1744 | return -ENOSYS; | |
1745 | return client_cb->timestamp_end(buf, handle, timestamp_end); | |
1746 | } | |
1747 | ||
1748 | int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream, | |
1749 | uint64_t *events_discarded) | |
1750 | { | |
1751 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1752 | struct lttng_ust_lib_ring_buffer *buf; |
1753 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1754 | |
1755 | if (!stream || !events_discarded) | |
1756 | return -EINVAL; | |
e1919a41 MD |
1757 | buf = stream->buf; |
1758 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1759 | client_cb = get_client_cb(buf, handle); |
1760 | if (!client_cb) | |
1761 | return -ENOSYS; | |
1762 | return client_cb->events_discarded(buf, handle, events_discarded); | |
1763 | } | |
1764 | ||
1765 | int ustctl_get_content_size(struct ustctl_consumer_stream *stream, | |
1766 | uint64_t *content_size) | |
1767 | { | |
1768 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1769 | struct lttng_ust_lib_ring_buffer *buf; |
1770 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1771 | |
1772 | if (!stream || !content_size) | |
1773 | return -EINVAL; | |
e1919a41 MD |
1774 | buf = stream->buf; |
1775 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1776 | client_cb = get_client_cb(buf, handle); |
1777 | if (!client_cb) | |
1778 | return -ENOSYS; | |
1779 | return client_cb->content_size(buf, handle, content_size); | |
1780 | } | |
1781 | ||
1782 | int ustctl_get_packet_size(struct ustctl_consumer_stream *stream, | |
1783 | uint64_t *packet_size) | |
1784 | { | |
1785 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1786 | struct lttng_ust_lib_ring_buffer *buf; |
1787 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1788 | |
1789 | if (!stream || !packet_size) | |
1790 | return -EINVAL; | |
e1919a41 MD |
1791 | buf = stream->buf; |
1792 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1793 | client_cb = get_client_cb(buf, handle); |
1794 | if (!client_cb) | |
1795 | return -ENOSYS; | |
1796 | return client_cb->packet_size(buf, handle, packet_size); | |
1797 | } | |
1798 | ||
1799 | int ustctl_get_stream_id(struct ustctl_consumer_stream *stream, | |
1800 | uint64_t *stream_id) | |
1801 | { | |
1802 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1803 | struct lttng_ust_lib_ring_buffer *buf; |
1804 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1805 | |
1806 | if (!stream || !stream_id) | |
1807 | return -EINVAL; | |
e1919a41 MD |
1808 | buf = stream->buf; |
1809 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1810 | client_cb = get_client_cb(buf, handle); |
1811 | if (!client_cb) | |
1812 | return -ENOSYS; | |
1813 | return client_cb->stream_id(buf, handle, stream_id); | |
1814 | } | |
1815 | ||
fca361e8 JD |
1816 | int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream, |
1817 | uint64_t *ts) | |
1818 | { | |
1819 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1820 | struct lttng_ust_lib_ring_buffer *buf; |
1821 | struct lttng_ust_shm_handle *handle; | |
fca361e8 JD |
1822 | |
1823 | if (!stream || !ts) | |
1824 | return -EINVAL; | |
e1919a41 MD |
1825 | buf = stream->buf; |
1826 | handle = stream->chan->chan->handle; | |
fca361e8 JD |
1827 | client_cb = get_client_cb(buf, handle); |
1828 | if (!client_cb || !client_cb->current_timestamp) | |
1829 | return -ENOSYS; | |
1830 | return client_cb->current_timestamp(buf, handle, ts); | |
1831 | } | |
1832 | ||
1ff31389 JD |
1833 | int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream, |
1834 | uint64_t *seq) | |
1835 | { | |
1836 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1837 | struct lttng_ust_lib_ring_buffer *buf; | |
1838 | struct lttng_ust_shm_handle *handle; | |
1839 | ||
1840 | if (!stream || !seq) | |
1841 | return -EINVAL; | |
1842 | buf = stream->buf; | |
1843 | handle = stream->chan->chan->handle; | |
1844 | client_cb = get_client_cb(buf, handle); | |
1845 | if (!client_cb || !client_cb->sequence_number) | |
1846 | return -ENOSYS; | |
1847 | return client_cb->sequence_number(buf, handle, seq); | |
1848 | } | |
1849 | ||
45a00b05 JD |
1850 | int ustctl_get_instance_id(struct ustctl_consumer_stream *stream, |
1851 | uint64_t *id) | |
1852 | { | |
1853 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1854 | struct lttng_ust_lib_ring_buffer *buf; | |
1855 | struct lttng_ust_shm_handle *handle; | |
1856 | ||
1857 | if (!stream || !id) | |
1858 | return -EINVAL; | |
1859 | buf = stream->buf; | |
1860 | handle = stream->chan->chan->handle; | |
1861 | client_cb = get_client_cb(buf, handle); | |
1862 | if (!client_cb) | |
1863 | return -ENOSYS; | |
1864 | return client_cb->instance_id(buf, handle, id); | |
1865 | } | |
1866 | ||
c62a3816 | 1867 | #ifdef LTTNG_UST_HAVE_PERF_EVENT |
57201bb3 MD |
1868 | |
1869 | int ustctl_has_perf_counters(void) | |
1870 | { | |
1871 | return 1; | |
1872 | } | |
1873 | ||
1874 | #else | |
1875 | ||
1876 | int ustctl_has_perf_counters(void) | |
1877 | { | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | #endif | |
1882 | ||
32ce8569 MD |
1883 | /* |
1884 | * Returns 0 on success, negative error value on error. | |
1885 | */ | |
1886 | int ustctl_recv_reg_msg(int sock, | |
1887 | enum ustctl_socket_type *type, | |
1888 | uint32_t *major, | |
1889 | uint32_t *minor, | |
1890 | uint32_t *pid, | |
1891 | uint32_t *ppid, | |
1892 | uint32_t *uid, | |
1893 | uint32_t *gid, | |
1894 | uint32_t *bits_per_long, | |
1895 | uint32_t *uint8_t_alignment, | |
1896 | uint32_t *uint16_t_alignment, | |
1897 | uint32_t *uint32_t_alignment, | |
1898 | uint32_t *uint64_t_alignment, | |
1899 | uint32_t *long_alignment, | |
1900 | int *byte_order, | |
1901 | char *name) | |
1902 | { | |
1903 | ssize_t len; | |
1904 | struct ustctl_reg_msg reg_msg; | |
1905 | ||
1906 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
1907 | if (len > 0 && len != sizeof(reg_msg)) | |
1908 | return -EIO; | |
1909 | if (len == 0) | |
1910 | return -EPIPE; | |
1911 | if (len < 0) | |
1912 | return len; | |
1913 | ||
1914 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
1915 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1916 | BIG_ENDIAN : LITTLE_ENDIAN; | |
1917 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
1918 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1919 | LITTLE_ENDIAN : BIG_ENDIAN; | |
1920 | } else { | |
1921 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
1922 | } | |
1923 | switch (reg_msg.socket_type) { | |
1924 | case 0: *type = USTCTL_SOCKET_CMD; | |
1925 | break; | |
1926 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
1927 | break; | |
1928 | default: | |
1929 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
1930 | } | |
1931 | *major = reg_msg.major; | |
1932 | *minor = reg_msg.minor; | |
1933 | *pid = reg_msg.pid; | |
1934 | *ppid = reg_msg.ppid; | |
1935 | *uid = reg_msg.uid; | |
1936 | *gid = reg_msg.gid; | |
1937 | *bits_per_long = reg_msg.bits_per_long; | |
1938 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
1939 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
1940 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
1941 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
1942 | *long_alignment = reg_msg.long_alignment; | |
1943 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
1944 | if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) { | |
1945 | return -LTTNG_UST_ERR_UNSUP_MAJOR; | |
1946 | } | |
1947 | ||
1948 | return 0; | |
1949 | } | |
1950 | ||
1951 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
1952 | { | |
1953 | struct ustcomm_notify_hdr header; | |
1954 | ssize_t len; | |
1955 | ||
1956 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
1957 | if (len > 0 && len != sizeof(header)) | |
1958 | return -EIO; | |
1959 | if (len == 0) | |
1960 | return -EPIPE; | |
1961 | if (len < 0) | |
1962 | return len; | |
1963 | switch (header.notify_cmd) { | |
1964 | case 0: | |
1965 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1966 | break; | |
1967 | case 1: | |
1968 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1969 | break; | |
c785c634 MD |
1970 | case 2: |
1971 | *notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1972 | break; | |
32ce8569 MD |
1973 | default: |
1974 | return -EINVAL; | |
1975 | } | |
1976 | return 0; | |
1977 | } | |
1978 | ||
1979 | /* | |
1980 | * Returns 0 on success, negative error value on error. | |
1981 | */ | |
1982 | int ustctl_recv_register_event(int sock, | |
1983 | int *session_objd, | |
1984 | int *channel_objd, | |
1985 | char *event_name, | |
1986 | int *loglevel, | |
1987 | char **signature, | |
1988 | size_t *nr_fields, | |
1989 | struct ustctl_field **fields, | |
1990 | char **model_emf_uri) | |
1991 | { | |
1992 | ssize_t len; | |
1993 | struct ustcomm_notify_event_msg msg; | |
1994 | size_t signature_len, fields_len, model_emf_uri_len; | |
1995 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
1996 | struct ustctl_field *a_fields = NULL; | |
1997 | ||
1998 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1999 | if (len > 0 && len != sizeof(msg)) | |
2000 | return -EIO; | |
2001 | if (len == 0) | |
2002 | return -EPIPE; | |
2003 | if (len < 0) | |
2004 | return len; | |
2005 | ||
2006 | *session_objd = msg.session_objd; | |
2007 | *channel_objd = msg.channel_objd; | |
2008 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
2009 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2010 | *loglevel = msg.loglevel; | |
2011 | signature_len = msg.signature_len; | |
2012 | fields_len = msg.fields_len; | |
2013 | ||
2014 | if (fields_len % sizeof(*a_fields) != 0) { | |
2015 | return -EINVAL; | |
2016 | } | |
2017 | ||
2018 | model_emf_uri_len = msg.model_emf_uri_len; | |
2019 | ||
2020 | /* recv signature. contains at least \0. */ | |
2021 | a_sign = zmalloc(signature_len); | |
2022 | if (!a_sign) | |
2023 | return -ENOMEM; | |
2024 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
2025 | if (len > 0 && len != signature_len) { | |
2026 | len = -EIO; | |
2027 | goto signature_error; | |
2028 | } | |
2029 | if (len == 0) { | |
2030 | len = -EPIPE; | |
2031 | goto signature_error; | |
2032 | } | |
2033 | if (len < 0) { | |
2034 | goto signature_error; | |
2035 | } | |
2036 | /* Enforce end of string */ | |
111198c2 | 2037 | a_sign[signature_len - 1] = '\0'; |
32ce8569 MD |
2038 | |
2039 | /* recv fields */ | |
2040 | if (fields_len) { | |
2041 | a_fields = zmalloc(fields_len); | |
2042 | if (!a_fields) { | |
2043 | len = -ENOMEM; | |
2044 | goto signature_error; | |
2045 | } | |
2046 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2047 | if (len > 0 && len != fields_len) { | |
2048 | len = -EIO; | |
2049 | goto fields_error; | |
2050 | } | |
2051 | if (len == 0) { | |
2052 | len = -EPIPE; | |
2053 | goto fields_error; | |
2054 | } | |
2055 | if (len < 0) { | |
2056 | goto fields_error; | |
2057 | } | |
2058 | } | |
2059 | ||
2060 | if (model_emf_uri_len) { | |
2061 | /* recv model_emf_uri_len */ | |
2062 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
2063 | if (!a_model_emf_uri) { | |
2064 | len = -ENOMEM; | |
2065 | goto fields_error; | |
2066 | } | |
2067 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
2068 | model_emf_uri_len); | |
2069 | if (len > 0 && len != model_emf_uri_len) { | |
2070 | len = -EIO; | |
2071 | goto model_error; | |
2072 | } | |
2073 | if (len == 0) { | |
2074 | len = -EPIPE; | |
2075 | goto model_error; | |
2076 | } | |
2077 | if (len < 0) { | |
2078 | goto model_error; | |
2079 | } | |
2080 | /* Enforce end of string */ | |
2081 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
2082 | } | |
2083 | ||
2084 | *signature = a_sign; | |
2085 | *nr_fields = fields_len / sizeof(*a_fields); | |
2086 | *fields = a_fields; | |
2087 | *model_emf_uri = a_model_emf_uri; | |
2088 | ||
2089 | return 0; | |
2090 | ||
2091 | model_error: | |
2092 | free(a_model_emf_uri); | |
2093 | fields_error: | |
2094 | free(a_fields); | |
2095 | signature_error: | |
2096 | free(a_sign); | |
2097 | return len; | |
2098 | } | |
2099 | ||
2100 | /* | |
2101 | * Returns 0 on success, negative error value on error. | |
2102 | */ | |
2103 | int ustctl_reply_register_event(int sock, | |
2104 | uint32_t id, | |
2105 | int ret_code) | |
2106 | { | |
2107 | ssize_t len; | |
2108 | struct { | |
2109 | struct ustcomm_notify_hdr header; | |
2110 | struct ustcomm_notify_event_reply r; | |
2111 | } reply; | |
2112 | ||
2113 | memset(&reply, 0, sizeof(reply)); | |
2114 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
2115 | reply.r.ret_code = ret_code; | |
2116 | reply.r.event_id = id; | |
2117 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2118 | if (len > 0 && len != sizeof(reply)) | |
2119 | return -EIO; | |
2120 | if (len < 0) | |
2121 | return len; | |
2122 | return 0; | |
2123 | } | |
2124 | ||
c785c634 MD |
2125 | /* |
2126 | * Returns 0 on success, negative UST or system error value on error. | |
2127 | */ | |
2128 | int ustctl_recv_register_enum(int sock, | |
2129 | int *session_objd, | |
2130 | char *enum_name, | |
2131 | struct ustctl_enum_entry **entries, | |
2132 | size_t *nr_entries) | |
2133 | { | |
2134 | ssize_t len; | |
2135 | struct ustcomm_notify_enum_msg msg; | |
2136 | size_t entries_len; | |
2137 | struct ustctl_enum_entry *a_entries = NULL; | |
2138 | ||
2139 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2140 | if (len > 0 && len != sizeof(msg)) | |
2141 | return -EIO; | |
2142 | if (len == 0) | |
2143 | return -EPIPE; | |
2144 | if (len < 0) | |
2145 | return len; | |
2146 | ||
2147 | *session_objd = msg.session_objd; | |
2148 | strncpy(enum_name, msg.enum_name, LTTNG_UST_SYM_NAME_LEN); | |
2149 | enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2150 | entries_len = msg.entries_len; | |
2151 | ||
2152 | if (entries_len % sizeof(*a_entries) != 0) { | |
2153 | return -EINVAL; | |
2154 | } | |
2155 | ||
2156 | /* recv entries */ | |
2157 | if (entries_len) { | |
2158 | a_entries = zmalloc(entries_len); | |
2159 | if (!a_entries) | |
2160 | return -ENOMEM; | |
2161 | len = ustcomm_recv_unix_sock(sock, a_entries, entries_len); | |
2162 | if (len > 0 && len != entries_len) { | |
2163 | len = -EIO; | |
2164 | goto entries_error; | |
2165 | } | |
2166 | if (len == 0) { | |
2167 | len = -EPIPE; | |
2168 | goto entries_error; | |
2169 | } | |
2170 | if (len < 0) { | |
2171 | goto entries_error; | |
2172 | } | |
2173 | } | |
2174 | *nr_entries = entries_len / sizeof(*a_entries); | |
2175 | *entries = a_entries; | |
2176 | ||
2177 | return 0; | |
2178 | ||
2179 | entries_error: | |
2180 | free(a_entries); | |
2181 | return len; | |
2182 | } | |
2183 | ||
2184 | /* | |
2185 | * Returns 0 on success, negative error value on error. | |
2186 | */ | |
2187 | int ustctl_reply_register_enum(int sock, | |
2188 | uint64_t id, | |
2189 | int ret_code) | |
2190 | { | |
2191 | ssize_t len; | |
2192 | struct { | |
2193 | struct ustcomm_notify_hdr header; | |
2194 | struct ustcomm_notify_enum_reply r; | |
2195 | } reply; | |
2196 | ||
2197 | memset(&reply, 0, sizeof(reply)); | |
2198 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
2199 | reply.r.ret_code = ret_code; | |
2200 | reply.r.enum_id = id; | |
2201 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2202 | if (len > 0 && len != sizeof(reply)) | |
2203 | return -EIO; | |
2204 | if (len < 0) | |
2205 | return len; | |
2206 | return 0; | |
2207 | } | |
2208 | ||
32ce8569 MD |
2209 | /* |
2210 | * Returns 0 on success, negative UST or system error value on error. | |
2211 | */ | |
2212 | int ustctl_recv_register_channel(int sock, | |
2213 | int *session_objd, /* session descriptor (output) */ | |
2214 | int *channel_objd, /* channel descriptor (output) */ | |
2215 | size_t *nr_fields, | |
2216 | struct ustctl_field **fields) | |
2217 | { | |
2218 | ssize_t len; | |
2219 | struct ustcomm_notify_channel_msg msg; | |
2220 | size_t fields_len; | |
2221 | struct ustctl_field *a_fields; | |
2222 | ||
2223 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2224 | if (len > 0 && len != sizeof(msg)) | |
2225 | return -EIO; | |
2226 | if (len == 0) | |
2227 | return -EPIPE; | |
2228 | if (len < 0) | |
2229 | return len; | |
2230 | ||
2231 | *session_objd = msg.session_objd; | |
2232 | *channel_objd = msg.channel_objd; | |
2233 | fields_len = msg.ctx_fields_len; | |
2234 | ||
2235 | if (fields_len % sizeof(*a_fields) != 0) { | |
2236 | return -EINVAL; | |
2237 | } | |
2238 | ||
2239 | /* recv fields */ | |
2240 | if (fields_len) { | |
2241 | a_fields = zmalloc(fields_len); | |
2242 | if (!a_fields) { | |
2243 | len = -ENOMEM; | |
2244 | goto alloc_error; | |
2245 | } | |
2246 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2247 | if (len > 0 && len != fields_len) { | |
2248 | len = -EIO; | |
2249 | goto fields_error; | |
2250 | } | |
2251 | if (len == 0) { | |
2252 | len = -EPIPE; | |
2253 | goto fields_error; | |
2254 | } | |
2255 | if (len < 0) { | |
2256 | goto fields_error; | |
2257 | } | |
2258 | *fields = a_fields; | |
2259 | } else { | |
2260 | *fields = NULL; | |
2261 | } | |
2262 | *nr_fields = fields_len / sizeof(*a_fields); | |
2263 | return 0; | |
2264 | ||
2265 | fields_error: | |
2266 | free(a_fields); | |
2267 | alloc_error: | |
2268 | return len; | |
2269 | } | |
2270 | ||
2271 | /* | |
2272 | * Returns 0 on success, negative error value on error. | |
2273 | */ | |
2274 | int ustctl_reply_register_channel(int sock, | |
2275 | uint32_t chan_id, | |
2276 | enum ustctl_channel_header header_type, | |
2277 | int ret_code) | |
2278 | { | |
2279 | ssize_t len; | |
2280 | struct { | |
2281 | struct ustcomm_notify_hdr header; | |
2282 | struct ustcomm_notify_channel_reply r; | |
2283 | } reply; | |
2284 | ||
2285 | memset(&reply, 0, sizeof(reply)); | |
2286 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
2287 | reply.r.ret_code = ret_code; | |
2288 | reply.r.chan_id = chan_id; | |
2289 | switch (header_type) { | |
2290 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
2291 | reply.r.header_type = 1; | |
2292 | break; | |
2293 | case USTCTL_CHANNEL_HEADER_LARGE: | |
2294 | reply.r.header_type = 2; | |
2295 | break; | |
2296 | default: | |
2297 | reply.r.header_type = 0; | |
2298 | break; | |
2299 | } | |
2300 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2301 | if (len > 0 && len != sizeof(reply)) | |
2302 | return -EIO; | |
2303 | if (len < 0) | |
2304 | return len; | |
2305 | return 0; | |
2306 | } | |
2307 | ||
f53329f3 JD |
2308 | /* Regenerate the statedump. */ |
2309 | int ustctl_regenerate_statedump(int sock, int handle) | |
2310 | { | |
2311 | struct ustcomm_ust_msg lum; | |
2312 | struct ustcomm_ust_reply lur; | |
2313 | int ret; | |
2314 | ||
2315 | memset(&lum, 0, sizeof(lum)); | |
2316 | lum.handle = handle; | |
2317 | lum.cmd = LTTNG_UST_SESSION_STATEDUMP; | |
2318 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
2319 | if (ret) | |
2320 | return ret; | |
2321 | DBG("Regenerated statedump for handle %u", handle); | |
2322 | return 0; | |
2323 | } | |
2324 | ||
74d81a6c MD |
2325 | static __attribute__((constructor)) |
2326 | void ustctl_init(void) | |
2327 | { | |
2328 | init_usterr(); | |
6f626d28 | 2329 | lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */ |
f9364363 | 2330 | lttng_ust_clock_init(); |
74d81a6c MD |
2331 | lttng_ring_buffer_metadata_client_init(); |
2332 | lttng_ring_buffer_client_overwrite_init(); | |
34a91bdb | 2333 | lttng_ring_buffer_client_overwrite_rt_init(); |
74d81a6c | 2334 | lttng_ring_buffer_client_discard_init(); |
34a91bdb | 2335 | lttng_ring_buffer_client_discard_rt_init(); |
03d2d293 | 2336 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
2337 | } |
2338 | ||
2339 | static __attribute__((destructor)) | |
2340 | void ustctl_exit(void) | |
2341 | { | |
34a91bdb | 2342 | lttng_ring_buffer_client_discard_rt_exit(); |
74d81a6c | 2343 | lttng_ring_buffer_client_discard_exit(); |
34a91bdb | 2344 | lttng_ring_buffer_client_overwrite_rt_exit(); |
74d81a6c MD |
2345 | lttng_ring_buffer_client_overwrite_exit(); |
2346 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 2347 | } |