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