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 | ||
fb31eb73 | 19 | #include <stdint.h> |
57773204 | 20 | #include <string.h> |
fb31eb73 | 21 | #include <sys/mman.h> |
4e79769f | 22 | #include <unistd.h> |
fb31eb73 | 23 | |
c62a3816 | 24 | #include <lttng/ust-config.h> |
4318ae1b MD |
25 | #include <lttng/ust-ctl.h> |
26 | #include <lttng/ust-abi.h> | |
c1fca457 | 27 | #include <lttng/ust-events.h> |
3208818b | 28 | #include <lttng/ust-endian.h> |
44c72f10 | 29 | #include <usterr-signal-safe.h> |
b728d87e | 30 | #include <ust-comm.h> |
74d81a6c | 31 | #include <helper.h> |
57773204 MD |
32 | |
33 | #include "../libringbuffer/backend.h" | |
34 | #include "../libringbuffer/frontend.h" | |
c9023c93 | 35 | #include "../liblttng-ust/wait.h" |
b2f3252a | 36 | #include "../liblttng-ust/lttng-rb-clients.h" |
f9364363 | 37 | #include "../liblttng-ust/clock.h" |
92ce256d | 38 | #include "../liblttng-ust/getenv.h" |
c9023c93 MD |
39 | |
40 | /* | |
41 | * Number of milliseconds to retry before failing metadata writes on | |
42 | * buffer full condition. (10 seconds) | |
43 | */ | |
44 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 | |
57773204 | 45 | |
74d81a6c MD |
46 | /* |
47 | * Channel representation within consumer. | |
48 | */ | |
49 | struct ustctl_consumer_channel { | |
50 | struct lttng_channel *chan; /* lttng channel buffers */ | |
6b120308 | 51 | |
74d81a6c MD |
52 | /* initial attributes */ |
53 | struct ustctl_consumer_channel_attr attr; | |
ff0f5728 MD |
54 | int wait_fd; /* monitor close() */ |
55 | int wakeup_fd; /* monitor close() */ | |
74d81a6c MD |
56 | }; |
57 | ||
58 | /* | |
59 | * Stream representation within consumer. | |
60 | */ | |
61 | struct ustctl_consumer_stream { | |
62 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
63 | struct lttng_ust_lib_ring_buffer *buf; | |
64 | struct ustctl_consumer_channel *chan; | |
65 | int shm_fd, wait_fd, wakeup_fd; | |
66 | int cpu; | |
67 | uint64_t memory_map_size; | |
68 | }; | |
69 | ||
70 | extern void lttng_ring_buffer_client_overwrite_init(void); | |
08a3170c | 71 | extern void lttng_ring_buffer_client_overwrite_rt_init(void); |
74d81a6c | 72 | extern void lttng_ring_buffer_client_discard_init(void); |
08a3170c | 73 | extern void lttng_ring_buffer_client_discard_rt_init(void); |
74d81a6c MD |
74 | extern void lttng_ring_buffer_metadata_client_init(void); |
75 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
08a3170c | 76 | extern void lttng_ring_buffer_client_overwrite_rt_exit(void); |
74d81a6c | 77 | extern void lttng_ring_buffer_client_discard_exit(void); |
08a3170c | 78 | extern void lttng_ring_buffer_client_discard_rt_exit(void); |
74d81a6c MD |
79 | extern void lttng_ring_buffer_metadata_client_exit(void); |
80 | ||
2be0e72c MD |
81 | int ustctl_release_handle(int sock, int handle) |
82 | { | |
83 | struct ustcomm_ust_msg lum; | |
84 | struct ustcomm_ust_reply lur; | |
2be0e72c | 85 | |
74d81a6c MD |
86 | if (sock < 0 || handle < 0) |
87 | return 0; | |
88 | memset(&lum, 0, sizeof(lum)); | |
89 | lum.handle = handle; | |
90 | lum.cmd = LTTNG_UST_RELEASE; | |
91 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 92 | } |
74d81a6c | 93 | |
12388166 MD |
94 | /* |
95 | * If sock is negative, it means we don't have to notify the other side | |
96 | * (e.g. application has already vanished). | |
97 | */ | |
d26228ae | 98 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 99 | { |
57773204 MD |
100 | int ret; |
101 | ||
9bfc503d MD |
102 | if (!data) |
103 | return -EINVAL; | |
104 | ||
74d81a6c MD |
105 | switch (data->type) { |
106 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
ff0f5728 MD |
107 | if (data->u.channel.wakeup_fd >= 0) { |
108 | ret = close(data->u.channel.wakeup_fd); | |
109 | if (ret < 0) { | |
110 | ret = -errno; | |
111 | return ret; | |
112 | } | |
dd6c697c | 113 | data->u.channel.wakeup_fd = -1; |
ff0f5728 | 114 | } |
74d81a6c | 115 | free(data->u.channel.data); |
dd6c697c | 116 | data->u.channel.data = NULL; |
74d81a6c MD |
117 | break; |
118 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
119 | if (data->u.stream.shm_fd >= 0) { | |
120 | ret = close(data->u.stream.shm_fd); | |
121 | if (ret < 0) { | |
122 | ret = -errno; | |
123 | return ret; | |
124 | } | |
dd6c697c | 125 | data->u.stream.shm_fd = -1; |
d26228ae | 126 | } |
74d81a6c MD |
127 | if (data->u.stream.wakeup_fd >= 0) { |
128 | ret = close(data->u.stream.wakeup_fd); | |
129 | if (ret < 0) { | |
130 | ret = -errno; | |
131 | return ret; | |
132 | } | |
dd6c697c | 133 | data->u.stream.wakeup_fd = -1; |
d26228ae | 134 | } |
74d81a6c | 135 | break; |
32ce8569 MD |
136 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
137 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
138 | break; | |
74d81a6c MD |
139 | default: |
140 | assert(0); | |
d26228ae | 141 | } |
2be0e72c | 142 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
143 | } |
144 | ||
1c5e467e MD |
145 | /* |
146 | * Send registration done packet to the application. | |
147 | */ | |
148 | int ustctl_register_done(int sock) | |
149 | { | |
150 | struct ustcomm_ust_msg lum; | |
151 | struct ustcomm_ust_reply lur; | |
152 | int ret; | |
153 | ||
154 | DBG("Sending register done command to %d", sock); | |
155 | memset(&lum, 0, sizeof(lum)); | |
156 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
157 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
158 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
159 | if (ret) | |
160 | return ret; | |
1c5e467e | 161 | return 0; |
1c5e467e MD |
162 | } |
163 | ||
57773204 MD |
164 | /* |
165 | * returns session handle. | |
166 | */ | |
167 | int ustctl_create_session(int sock) | |
168 | { | |
169 | struct ustcomm_ust_msg lum; | |
170 | struct ustcomm_ust_reply lur; | |
171 | int ret, session_handle; | |
172 | ||
173 | /* Create session */ | |
174 | memset(&lum, 0, sizeof(lum)); | |
175 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
176 | lum.cmd = LTTNG_UST_SESSION; | |
177 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
178 | if (ret) | |
179 | return ret; | |
180 | session_handle = lur.ret_val; | |
181 | DBG("received session handle %u", session_handle); | |
182 | return session_handle; | |
183 | } | |
184 | ||
57773204 | 185 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
186 | struct lttng_ust_object_data *channel_data, |
187 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
188 | { |
189 | struct ustcomm_ust_msg lum; | |
190 | struct ustcomm_ust_reply lur; | |
61f02aea | 191 | struct lttng_ust_object_data *event_data; |
57773204 MD |
192 | int ret; |
193 | ||
9bfc503d MD |
194 | if (!channel_data || !_event_data) |
195 | return -EINVAL; | |
196 | ||
74d81a6c | 197 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
198 | if (!event_data) |
199 | return -ENOMEM; | |
32ce8569 | 200 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
201 | memset(&lum, 0, sizeof(lum)); |
202 | lum.handle = channel_data->handle; | |
203 | lum.cmd = LTTNG_UST_EVENT; | |
204 | strncpy(lum.u.event.name, ev->name, | |
205 | LTTNG_UST_SYM_NAME_LEN); | |
206 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
207 | lum.u.event.loglevel_type = ev->loglevel_type; |
208 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
209 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
210 | if (ret) { | |
211 | free(event_data); | |
212 | return ret; | |
213 | } | |
214 | event_data->handle = lur.ret_val; | |
215 | DBG("received event handle %u", event_data->handle); | |
216 | *_event_data = event_data; | |
217 | return 0; | |
218 | } | |
219 | ||
53f0df51 | 220 | int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
61f02aea MD |
221 | struct lttng_ust_object_data *obj_data, |
222 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
223 | { |
224 | struct ustcomm_ust_msg lum; | |
225 | struct ustcomm_ust_reply lur; | |
53f0df51 JG |
226 | struct lttng_ust_object_data *context_data = NULL; |
227 | char *buf = NULL; | |
228 | size_t len; | |
57773204 MD |
229 | int ret; |
230 | ||
53f0df51 JG |
231 | if (!obj_data || !_context_data) { |
232 | ret = -EINVAL; | |
233 | goto end; | |
234 | } | |
9bfc503d | 235 | |
74d81a6c | 236 | context_data = zmalloc(sizeof(*context_data)); |
53f0df51 JG |
237 | if (!context_data) { |
238 | ret = -ENOMEM; | |
239 | goto end; | |
240 | } | |
32ce8569 | 241 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 242 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 243 | lum.handle = obj_data->handle; |
57773204 | 244 | lum.cmd = LTTNG_UST_CONTEXT; |
53f0df51 JG |
245 | |
246 | lum.u.context.ctx = ctx->ctx; | |
247 | switch (ctx->ctx) { | |
248 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
249 | lum.u.context.u.perf_counter = ctx->u.perf_counter; | |
250 | break; | |
251 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
252 | { | |
253 | size_t provider_name_len = strlen( | |
254 | ctx->u.app_ctx.provider_name) + 1; | |
255 | size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1; | |
256 | ||
257 | lum.u.context.u.app_ctx.provider_name_len = provider_name_len; | |
258 | lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len; | |
259 | ||
260 | len = provider_name_len + ctx_name_len; | |
261 | buf = zmalloc(len); | |
262 | if (!buf) { | |
263 | ret = -ENOMEM; | |
264 | goto end; | |
265 | } | |
266 | memcpy(buf, ctx->u.app_ctx.provider_name, | |
267 | provider_name_len); | |
268 | memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name, | |
269 | ctx_name_len); | |
270 | break; | |
271 | } | |
272 | default: | |
273 | break; | |
274 | } | |
275 | ret = ustcomm_send_app_msg(sock, &lum); | |
276 | if (ret) | |
277 | goto end; | |
278 | if (buf) { | |
279 | /* send var len ctx_name */ | |
280 | ret = ustcomm_send_unix_sock(sock, buf, len); | |
281 | if (ret < 0) { | |
282 | goto end; | |
283 | } | |
284 | if (ret != len) { | |
285 | ret = -EINVAL; | |
286 | goto end; | |
287 | } | |
288 | } | |
289 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
290 | if (ret < 0) { | |
291 | goto end; | |
57773204 | 292 | } |
32ce8569 MD |
293 | context_data->handle = -1; |
294 | DBG("Context created successfully"); | |
57773204 | 295 | *_context_data = context_data; |
53f0df51 JG |
296 | context_data = NULL; |
297 | end: | |
298 | free(context_data); | |
299 | free(buf); | |
57773204 MD |
300 | return ret; |
301 | } | |
302 | ||
cd54f6d9 MD |
303 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
304 | struct lttng_ust_object_data *obj_data) | |
305 | { | |
306 | struct ustcomm_ust_msg lum; | |
307 | struct ustcomm_ust_reply lur; | |
308 | int ret; | |
309 | ||
310 | if (!obj_data) | |
311 | return -EINVAL; | |
312 | ||
313 | memset(&lum, 0, sizeof(lum)); | |
314 | lum.handle = obj_data->handle; | |
315 | lum.cmd = LTTNG_UST_FILTER; | |
316 | lum.u.filter.data_size = bytecode->len; | |
317 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 318 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
319 | |
320 | ret = ustcomm_send_app_msg(sock, &lum); | |
321 | if (ret) | |
322 | return ret; | |
cd54f6d9 MD |
323 | /* send var len bytecode */ |
324 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
325 | bytecode->len); | |
326 | if (ret < 0) { | |
327 | return ret; | |
328 | } | |
7bc53e94 MD |
329 | if (ret != bytecode->len) |
330 | return -EINVAL; | |
331 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
332 | } |
333 | ||
da57c034 JI |
334 | int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion, |
335 | struct lttng_ust_object_data *obj_data) | |
336 | { | |
337 | struct ustcomm_ust_msg lum; | |
338 | struct ustcomm_ust_reply lur; | |
339 | int ret; | |
340 | ||
341 | if (!obj_data) { | |
342 | return -EINVAL; | |
343 | } | |
344 | ||
345 | memset(&lum, 0, sizeof(lum)); | |
346 | lum.handle = obj_data->handle; | |
347 | lum.cmd = LTTNG_UST_EXCLUSION; | |
348 | lum.u.exclusion.count = exclusion->count; | |
349 | ||
350 | ret = ustcomm_send_app_msg(sock, &lum); | |
351 | if (ret) { | |
352 | return ret; | |
353 | } | |
354 | ||
1628366f | 355 | /* send var len exclusion names */ |
da57c034 JI |
356 | ret = ustcomm_send_unix_sock(sock, |
357 | exclusion->names, | |
358 | exclusion->count * LTTNG_UST_SYM_NAME_LEN); | |
359 | if (ret < 0) { | |
360 | return ret; | |
361 | } | |
362 | if (ret != exclusion->count * LTTNG_UST_SYM_NAME_LEN) { | |
363 | return -EINVAL; | |
364 | } | |
365 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
366 | } | |
367 | ||
57773204 | 368 | /* Enable event, channel and session ioctl */ |
61f02aea | 369 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
370 | { |
371 | struct ustcomm_ust_msg lum; | |
372 | struct ustcomm_ust_reply lur; | |
373 | int ret; | |
374 | ||
9bfc503d MD |
375 | if (!object) |
376 | return -EINVAL; | |
377 | ||
57773204 MD |
378 | memset(&lum, 0, sizeof(lum)); |
379 | lum.handle = object->handle; | |
380 | lum.cmd = LTTNG_UST_ENABLE; | |
381 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
382 | if (ret) | |
383 | return ret; | |
384 | DBG("enabled handle %u", object->handle); | |
385 | return 0; | |
386 | } | |
387 | ||
388 | /* Disable event, channel and session ioctl */ | |
61f02aea | 389 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
390 | { |
391 | struct ustcomm_ust_msg lum; | |
392 | struct ustcomm_ust_reply lur; | |
393 | int ret; | |
394 | ||
9bfc503d MD |
395 | if (!object) |
396 | return -EINVAL; | |
397 | ||
57773204 MD |
398 | memset(&lum, 0, sizeof(lum)); |
399 | lum.handle = object->handle; | |
400 | lum.cmd = LTTNG_UST_DISABLE; | |
401 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
402 | if (ret) | |
403 | return ret; | |
404 | DBG("disable handle %u", object->handle); | |
405 | return 0; | |
406 | } | |
407 | ||
4a6ca058 | 408 | int ustctl_start_session(int sock, int handle) |
57773204 | 409 | { |
61f02aea | 410 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
411 | |
412 | obj.handle = handle; | |
413 | return ustctl_enable(sock, &obj); | |
57773204 MD |
414 | } |
415 | ||
4a6ca058 | 416 | int ustctl_stop_session(int sock, int handle) |
57773204 | 417 | { |
61f02aea | 418 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
419 | |
420 | obj.handle = handle; | |
421 | return ustctl_disable(sock, &obj); | |
57773204 MD |
422 | } |
423 | ||
57773204 MD |
424 | int ustctl_tracepoint_list(int sock) |
425 | { | |
b115631f MD |
426 | struct ustcomm_ust_msg lum; |
427 | struct ustcomm_ust_reply lur; | |
428 | int ret, tp_list_handle; | |
429 | ||
430 | memset(&lum, 0, sizeof(lum)); | |
431 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
432 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
433 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
434 | if (ret) | |
435 | return ret; | |
436 | tp_list_handle = lur.ret_val; | |
437 | DBG("received tracepoint list handle %u", tp_list_handle); | |
438 | return tp_list_handle; | |
439 | } | |
440 | ||
441 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 442 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
443 | { |
444 | struct ustcomm_ust_msg lum; | |
445 | struct ustcomm_ust_reply lur; | |
446 | int ret; | |
447 | ||
9bfc503d MD |
448 | if (!iter) |
449 | return -EINVAL; | |
450 | ||
b115631f MD |
451 | memset(&lum, 0, sizeof(lum)); |
452 | lum.handle = tp_list_handle; | |
453 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
454 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
455 | if (ret) | |
456 | return ret; | |
882a56d7 | 457 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 458 | lur.u.tracepoint.name, |
882a56d7 | 459 | lur.u.tracepoint.loglevel); |
cbef6901 | 460 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 461 | return 0; |
57773204 MD |
462 | } |
463 | ||
40003310 MD |
464 | int ustctl_tracepoint_field_list(int sock) |
465 | { | |
466 | struct ustcomm_ust_msg lum; | |
467 | struct ustcomm_ust_reply lur; | |
468 | int ret, tp_field_list_handle; | |
469 | ||
470 | memset(&lum, 0, sizeof(lum)); | |
471 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
472 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
473 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
474 | if (ret) | |
475 | return ret; | |
476 | tp_field_list_handle = lur.ret_val; | |
477 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
478 | return tp_field_list_handle; | |
479 | } | |
480 | ||
481 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
482 | struct lttng_ust_field_iter *iter) | |
483 | { | |
484 | struct ustcomm_ust_msg lum; | |
485 | struct ustcomm_ust_reply lur; | |
486 | int ret; | |
487 | ssize_t len; | |
488 | ||
489 | if (!iter) | |
490 | return -EINVAL; | |
491 | ||
492 | memset(&lum, 0, sizeof(lum)); | |
493 | lum.handle = tp_field_list_handle; | |
494 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
495 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
496 | if (ret) | |
497 | return ret; | |
498 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
499 | if (len != sizeof(*iter)) { | |
500 | return -EINVAL; | |
501 | } | |
502 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
503 | iter->event_name, | |
504 | iter->loglevel, | |
505 | iter->field_name, | |
506 | iter->type); | |
507 | return 0; | |
508 | } | |
509 | ||
57773204 MD |
510 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
511 | { | |
512 | struct ustcomm_ust_msg lum; | |
513 | struct ustcomm_ust_reply lur; | |
514 | int ret; | |
515 | ||
9bfc503d MD |
516 | if (!v) |
517 | return -EINVAL; | |
518 | ||
57773204 MD |
519 | memset(&lum, 0, sizeof(lum)); |
520 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
521 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
522 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
523 | if (ret) | |
524 | return ret; | |
525 | memcpy(v, &lur.u.version, sizeof(*v)); | |
526 | DBG("received tracer version"); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | int ustctl_wait_quiescent(int sock) | |
531 | { | |
532 | struct ustcomm_ust_msg lum; | |
533 | struct ustcomm_ust_reply lur; | |
534 | int ret; | |
535 | ||
536 | memset(&lum, 0, sizeof(lum)); | |
537 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
538 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
539 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
540 | if (ret) | |
541 | return ret; | |
542 | DBG("waited for quiescent state"); | |
543 | return 0; | |
544 | } | |
545 | ||
546 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
547 | { | |
9bfc503d MD |
548 | if (!calibrate) |
549 | return -EINVAL; | |
550 | ||
57773204 MD |
551 | return -ENOSYS; |
552 | } | |
553 | ||
f1fffc57 MD |
554 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
555 | { | |
556 | struct ustcomm_ust_msg lum; | |
557 | struct ustcomm_ust_reply lur; | |
558 | int ret; | |
559 | ||
9bfc503d MD |
560 | if (!object) |
561 | return -EINVAL; | |
562 | ||
f1fffc57 MD |
563 | memset(&lum, 0, sizeof(lum)); |
564 | lum.handle = object->handle; | |
565 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
566 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
567 | if (ret) | |
568 | return ret; | |
569 | DBG("flushed buffer handle %u", object->handle); | |
570 | return 0; | |
571 | } | |
572 | ||
74d81a6c MD |
573 | static |
574 | int ustctl_send_channel(int sock, | |
575 | enum lttng_ust_chan_type type, | |
576 | void *data, | |
577 | uint64_t size, | |
ff0f5728 | 578 | int wakeup_fd, |
74d81a6c MD |
579 | int send_fd_only) |
580 | { | |
581 | ssize_t len; | |
582 | ||
583 | if (!send_fd_only) { | |
584 | /* Send mmap size */ | |
585 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
586 | if (len != sizeof(size)) { | |
587 | if (len < 0) | |
588 | return len; | |
589 | else | |
590 | return -EIO; | |
591 | } | |
592 | ||
593 | /* Send channel type */ | |
594 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
595 | if (len != sizeof(type)) { | |
596 | if (len < 0) | |
597 | return len; | |
598 | else | |
599 | return -EIO; | |
600 | } | |
601 | } | |
602 | ||
603 | /* Send channel data */ | |
604 | len = ustcomm_send_unix_sock(sock, data, size); | |
605 | if (len != size) { | |
606 | if (len < 0) | |
607 | return len; | |
608 | else | |
609 | return -EIO; | |
610 | } | |
57773204 | 611 | |
ff0f5728 MD |
612 | /* Send wakeup fd */ |
613 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
614 | if (len <= 0) { | |
615 | if (len < 0) | |
616 | return len; | |
617 | else | |
618 | return -EIO; | |
619 | } | |
74d81a6c MD |
620 | return 0; |
621 | } | |
622 | ||
623 | static | |
624 | int ustctl_send_stream(int sock, | |
625 | uint32_t stream_nr, | |
626 | uint64_t memory_map_size, | |
627 | int shm_fd, int wakeup_fd, | |
628 | int send_fd_only) | |
57773204 | 629 | { |
74d81a6c MD |
630 | ssize_t len; |
631 | int fds[2]; | |
632 | ||
633 | if (!send_fd_only) { | |
634 | if (shm_fd < 0) { | |
635 | /* finish iteration */ | |
636 | uint64_t v = -1; | |
637 | ||
638 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
639 | if (len != sizeof(v)) { | |
640 | if (len < 0) | |
641 | return len; | |
642 | else | |
643 | return -EIO; | |
644 | } | |
645 | return 0; | |
646 | } | |
647 | ||
648 | /* Send mmap size */ | |
649 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
650 | sizeof(memory_map_size)); | |
651 | if (len != sizeof(memory_map_size)) { | |
652 | if (len < 0) | |
653 | return len; | |
654 | else | |
655 | return -EIO; | |
656 | } | |
657 | ||
658 | /* Send stream nr */ | |
659 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
660 | sizeof(stream_nr)); | |
661 | if (len != sizeof(stream_nr)) { | |
662 | if (len < 0) | |
663 | return len; | |
664 | else | |
665 | return -EIO; | |
666 | } | |
667 | } | |
668 | ||
669 | /* Send shm fd and wakeup fd */ | |
670 | fds[0] = shm_fd; | |
671 | fds[1] = wakeup_fd; | |
672 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
673 | if (len <= 0) { | |
674 | if (len < 0) | |
675 | return len; | |
676 | else | |
677 | return -EIO; | |
678 | } | |
679 | return 0; | |
680 | } | |
681 | ||
682 | int ustctl_recv_channel_from_consumer(int sock, | |
683 | struct lttng_ust_object_data **_channel_data) | |
684 | { | |
685 | struct lttng_ust_object_data *channel_data; | |
686 | ssize_t len; | |
ff0f5728 | 687 | int wakeup_fd; |
7a784989 | 688 | int ret; |
57773204 | 689 | |
74d81a6c MD |
690 | channel_data = zmalloc(sizeof(*channel_data)); |
691 | if (!channel_data) { | |
692 | ret = -ENOMEM; | |
693 | goto error_alloc; | |
694 | } | |
695 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
12f3dabc | 696 | channel_data->handle = -1; |
74d81a6c MD |
697 | |
698 | /* recv mmap size */ | |
699 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
700 | sizeof(channel_data->size)); | |
701 | if (len != sizeof(channel_data->size)) { | |
702 | if (len < 0) | |
703 | ret = len; | |
704 | else | |
705 | ret = -EINVAL; | |
706 | goto error; | |
707 | } | |
9bfc503d | 708 | |
74d81a6c MD |
709 | /* recv channel type */ |
710 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
711 | sizeof(channel_data->u.channel.type)); | |
712 | if (len != sizeof(channel_data->u.channel.type)) { | |
713 | if (len < 0) | |
714 | ret = len; | |
715 | else | |
716 | ret = -EINVAL; | |
717 | goto error; | |
718 | } | |
719 | ||
720 | /* recv channel data */ | |
721 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
722 | if (!channel_data->u.channel.data) { | |
723 | ret = -ENOMEM; | |
724 | goto error; | |
725 | } | |
726 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
727 | channel_data->size); | |
728 | if (len != channel_data->size) { | |
729 | if (len < 0) | |
730 | ret = len; | |
731 | else | |
732 | ret = -EINVAL; | |
733 | goto error_recv_data; | |
734 | } | |
ff0f5728 MD |
735 | /* recv wakeup fd */ |
736 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
737 | if (len <= 0) { | |
738 | if (len < 0) { | |
739 | ret = len; | |
740 | goto error_recv_data; | |
741 | } else { | |
742 | ret = -EIO; | |
743 | goto error_recv_data; | |
744 | } | |
745 | } | |
746 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
747 | *_channel_data = channel_data; |
748 | return 0; | |
749 | ||
750 | error_recv_data: | |
751 | free(channel_data->u.channel.data); | |
752 | error: | |
753 | free(channel_data); | |
754 | error_alloc: | |
755 | return ret; | |
756 | } | |
757 | ||
758 | int ustctl_recv_stream_from_consumer(int sock, | |
759 | struct lttng_ust_object_data **_stream_data) | |
760 | { | |
761 | struct lttng_ust_object_data *stream_data; | |
762 | ssize_t len; | |
763 | int ret; | |
764 | int fds[2]; | |
765 | ||
766 | stream_data = zmalloc(sizeof(*stream_data)); | |
767 | if (!stream_data) { | |
768 | ret = -ENOMEM; | |
769 | goto error_alloc; | |
57773204 | 770 | } |
74d81a6c MD |
771 | |
772 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
773 | stream_data->handle = -1; | |
774 | ||
775 | /* recv mmap size */ | |
776 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
777 | sizeof(stream_data->size)); | |
778 | if (len != sizeof(stream_data->size)) { | |
779 | if (len < 0) | |
780 | ret = len; | |
781 | else | |
782 | ret = -EINVAL; | |
783 | goto error; | |
784 | } | |
785 | if (stream_data->size == -1) { | |
786 | ret = -LTTNG_UST_ERR_NOENT; | |
787 | goto error; | |
788 | } | |
789 | ||
790 | /* recv stream nr */ | |
791 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
792 | sizeof(stream_data->u.stream.stream_nr)); | |
793 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
794 | if (len < 0) | |
795 | ret = len; | |
796 | else | |
797 | ret = -EINVAL; | |
798 | goto error; | |
799 | } | |
800 | ||
801 | /* recv shm fd and wakeup fd */ | |
802 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
803 | if (len <= 0) { | |
804 | if (len < 0) { | |
805 | ret = len; | |
806 | goto error; | |
807 | } else { | |
808 | ret = -EIO; | |
809 | goto error; | |
0bfe09ec | 810 | } |
0bfe09ec | 811 | } |
74d81a6c MD |
812 | stream_data->u.stream.shm_fd = fds[0]; |
813 | stream_data->u.stream.wakeup_fd = fds[1]; | |
814 | *_stream_data = stream_data; | |
815 | return 0; | |
0bfe09ec | 816 | |
74d81a6c MD |
817 | error: |
818 | free(stream_data); | |
819 | error_alloc: | |
820 | return ret; | |
821 | } | |
822 | ||
823 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
824 | struct lttng_ust_object_data *channel_data) | |
825 | { | |
826 | struct ustcomm_ust_msg lum; | |
827 | struct ustcomm_ust_reply lur; | |
828 | int ret; | |
829 | ||
830 | if (!channel_data) | |
831 | return -EINVAL; | |
832 | ||
833 | memset(&lum, 0, sizeof(lum)); | |
834 | lum.handle = session_handle; | |
835 | lum.cmd = LTTNG_UST_CHANNEL; | |
836 | lum.u.channel.len = channel_data->size; | |
837 | lum.u.channel.type = channel_data->u.channel.type; | |
838 | ret = ustcomm_send_app_msg(sock, &lum); | |
839 | if (ret) | |
840 | return ret; | |
841 | ||
842 | ret = ustctl_send_channel(sock, | |
843 | channel_data->u.channel.type, | |
844 | channel_data->u.channel.data, | |
845 | channel_data->size, | |
ff0f5728 | 846 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
847 | 1); |
848 | if (ret) | |
849 | return ret; | |
850 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
851 | if (!ret) { | |
7f2348b8 | 852 | channel_data->handle = lur.ret_val; |
57773204 | 853 | } |
74d81a6c MD |
854 | return ret; |
855 | } | |
856 | ||
857 | int ustctl_send_stream_to_ust(int sock, | |
858 | struct lttng_ust_object_data *channel_data, | |
859 | struct lttng_ust_object_data *stream_data) | |
860 | { | |
861 | struct ustcomm_ust_msg lum; | |
862 | struct ustcomm_ust_reply lur; | |
863 | int ret; | |
864 | ||
865 | memset(&lum, 0, sizeof(lum)); | |
866 | lum.handle = channel_data->handle; | |
867 | lum.cmd = LTTNG_UST_STREAM; | |
868 | lum.u.stream.len = stream_data->size; | |
869 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
870 | ret = ustcomm_send_app_msg(sock, &lum); | |
871 | if (ret) | |
872 | return ret; | |
873 | ||
874 | assert(stream_data); | |
875 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
876 | ||
877 | ret = ustctl_send_stream(sock, | |
878 | stream_data->u.stream.stream_nr, | |
879 | stream_data->size, | |
880 | stream_data->u.stream.shm_fd, | |
881 | stream_data->u.stream.wakeup_fd, 1); | |
882 | if (ret) | |
883 | return ret; | |
884 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
885 | } | |
886 | ||
12f3dabc MD |
887 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, |
888 | struct lttng_ust_object_data *src) | |
889 | { | |
890 | struct lttng_ust_object_data *obj; | |
891 | int ret; | |
892 | ||
893 | if (src->handle != -1) { | |
894 | ret = -EINVAL; | |
895 | goto error; | |
896 | } | |
897 | ||
898 | obj = zmalloc(sizeof(*obj)); | |
899 | if (!obj) { | |
900 | ret = -ENOMEM; | |
901 | goto error; | |
902 | } | |
903 | ||
904 | obj->type = src->type; | |
905 | obj->handle = src->handle; | |
906 | obj->size = src->size; | |
907 | ||
908 | switch (obj->type) { | |
909 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
910 | { | |
911 | obj->u.channel.type = src->u.channel.type; | |
912 | if (src->u.channel.wakeup_fd >= 0) { | |
913 | obj->u.channel.wakeup_fd = | |
914 | dup(src->u.channel.wakeup_fd); | |
915 | if (obj->u.channel.wakeup_fd < 0) { | |
916 | ret = errno; | |
917 | goto chan_error_wakeup_fd; | |
918 | } | |
919 | } else { | |
920 | obj->u.channel.wakeup_fd = | |
921 | src->u.channel.wakeup_fd; | |
922 | } | |
923 | obj->u.channel.data = zmalloc(obj->size); | |
924 | if (!obj->u.channel.data) { | |
925 | ret = -ENOMEM; | |
926 | goto chan_error_alloc; | |
927 | } | |
928 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
929 | break; | |
930 | ||
931 | chan_error_alloc: | |
932 | if (src->u.channel.wakeup_fd >= 0) { | |
933 | int closeret; | |
934 | ||
935 | closeret = close(obj->u.channel.wakeup_fd); | |
936 | if (closeret) { | |
937 | PERROR("close"); | |
938 | } | |
939 | } | |
940 | chan_error_wakeup_fd: | |
941 | goto error_type; | |
942 | ||
943 | } | |
944 | ||
945 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
946 | { | |
947 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
948 | if (src->u.stream.wakeup_fd >= 0) { | |
949 | obj->u.stream.wakeup_fd = | |
950 | dup(src->u.stream.wakeup_fd); | |
951 | if (obj->u.stream.wakeup_fd < 0) { | |
952 | ret = errno; | |
953 | goto stream_error_wakeup_fd; | |
954 | } | |
955 | } else { | |
956 | obj->u.stream.wakeup_fd = | |
957 | src->u.stream.wakeup_fd; | |
958 | } | |
959 | ||
960 | if (src->u.stream.shm_fd >= 0) { | |
961 | obj->u.stream.shm_fd = | |
962 | dup(src->u.stream.shm_fd); | |
963 | if (obj->u.stream.shm_fd < 0) { | |
964 | ret = errno; | |
965 | goto stream_error_shm_fd; | |
966 | } | |
967 | } else { | |
968 | obj->u.stream.shm_fd = | |
969 | src->u.stream.shm_fd; | |
970 | } | |
971 | break; | |
972 | ||
973 | stream_error_shm_fd: | |
974 | if (src->u.stream.wakeup_fd >= 0) { | |
975 | int closeret; | |
976 | ||
977 | closeret = close(obj->u.stream.wakeup_fd); | |
978 | if (closeret) { | |
979 | PERROR("close"); | |
980 | } | |
981 | } | |
982 | stream_error_wakeup_fd: | |
983 | goto error_type; | |
984 | } | |
985 | ||
986 | default: | |
987 | ret = -EINVAL; | |
988 | goto error_type; | |
989 | } | |
990 | ||
991 | *dest = obj; | |
992 | return 0; | |
993 | ||
994 | error_type: | |
995 | free(obj); | |
996 | error: | |
997 | return ret; | |
998 | } | |
999 | ||
74d81a6c MD |
1000 | |
1001 | /* Buffer operations */ | |
1002 | ||
5ea386c3 MD |
1003 | int ustctl_get_nr_stream_per_channel(void) |
1004 | { | |
1005 | return num_possible_cpus(); | |
1006 | } | |
1007 | ||
74d81a6c | 1008 | struct ustctl_consumer_channel * |
5ea386c3 MD |
1009 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr, |
1010 | const int *stream_fds, int nr_stream_fds) | |
74d81a6c MD |
1011 | { |
1012 | struct ustctl_consumer_channel *chan; | |
1013 | const char *transport_name; | |
1014 | struct lttng_transport *transport; | |
1015 | ||
1016 | switch (attr->type) { | |
1017 | case LTTNG_UST_CHAN_PER_CPU: | |
1018 | if (attr->output == LTTNG_UST_MMAP) { | |
34a91bdb MD |
1019 | if (attr->overwrite) { |
1020 | if (attr->read_timer_interval == 0) { | |
1021 | transport_name = "relay-overwrite-mmap"; | |
1022 | } else { | |
1023 | transport_name = "relay-overwrite-rt-mmap"; | |
1024 | } | |
1025 | } else { | |
1026 | if (attr->read_timer_interval == 0) { | |
1027 | transport_name = "relay-discard-mmap"; | |
1028 | } else { | |
1029 | transport_name = "relay-discard-rt-mmap"; | |
1030 | } | |
1031 | } | |
74d81a6c MD |
1032 | } else { |
1033 | return NULL; | |
1034 | } | |
c1fca457 | 1035 | break; |
74d81a6c MD |
1036 | case LTTNG_UST_CHAN_METADATA: |
1037 | if (attr->output == LTTNG_UST_MMAP) | |
1038 | transport_name = "relay-metadata-mmap"; | |
1039 | else | |
1040 | return NULL; | |
c1fca457 MD |
1041 | break; |
1042 | default: | |
74d81a6c | 1043 | transport_name = "<unknown>"; |
c1fca457 MD |
1044 | return NULL; |
1045 | } | |
74d81a6c MD |
1046 | |
1047 | transport = lttng_transport_find(transport_name); | |
1048 | if (!transport) { | |
1049 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 1050 | transport_name); |
74d81a6c | 1051 | return NULL; |
7a784989 | 1052 | } |
74d81a6c MD |
1053 | |
1054 | chan = zmalloc(sizeof(*chan)); | |
1055 | if (!chan) | |
1056 | return NULL; | |
1057 | ||
1058 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 1059 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 1060 | attr->switch_timer_interval, |
32ce8569 | 1061 | attr->read_timer_interval, |
a9ff648c | 1062 | attr->uuid, attr->chan_id, |
b2c5f61a MD |
1063 | stream_fds, nr_stream_fds, |
1064 | attr->blocking_timeout); | |
74d81a6c MD |
1065 | if (!chan->chan) { |
1066 | goto chan_error; | |
1067 | } | |
1068 | chan->chan->ops = &transport->ops; | |
1069 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
cb7378b3 MD |
1070 | chan->wait_fd = ustctl_channel_get_wait_fd(chan); |
1071 | chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
1072 | return chan; |
1073 | ||
1074 | chan_error: | |
1075 | free(chan); | |
1076 | return NULL; | |
57773204 MD |
1077 | } |
1078 | ||
74d81a6c | 1079 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 1080 | { |
b24e4e91 MD |
1081 | (void) ustctl_channel_close_wait_fd(chan); |
1082 | (void) ustctl_channel_close_wakeup_fd(chan); | |
74d81a6c MD |
1083 | chan->chan->ops->channel_destroy(chan->chan); |
1084 | free(chan); | |
1085 | } | |
1086 | ||
1087 | int ustctl_send_channel_to_sessiond(int sock, | |
1088 | struct ustctl_consumer_channel *channel) | |
1089 | { | |
1090 | struct shm_object_table *table; | |
57773204 | 1091 | |
74d81a6c MD |
1092 | table = channel->chan->handle->table; |
1093 | if (table->size <= 0) | |
9bfc503d | 1094 | return -EINVAL; |
74d81a6c MD |
1095 | return ustctl_send_channel(sock, |
1096 | channel->attr.type, | |
1097 | table->objects[0].memory_map, | |
1098 | table->objects[0].memory_map_size, | |
ff0f5728 | 1099 | channel->wakeup_fd, |
74d81a6c MD |
1100 | 0); |
1101 | } | |
9bfc503d | 1102 | |
74d81a6c MD |
1103 | int ustctl_send_stream_to_sessiond(int sock, |
1104 | struct ustctl_consumer_stream *stream) | |
1105 | { | |
1106 | if (!stream) | |
1107 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
1108 | ||
1109 | return ustctl_send_stream(sock, | |
1110 | stream->cpu, | |
1111 | stream->memory_map_size, | |
1112 | stream->shm_fd, stream->wakeup_fd, | |
1113 | 0); | |
57773204 MD |
1114 | } |
1115 | ||
c9023c93 MD |
1116 | int ustctl_write_metadata_to_channel( |
1117 | struct ustctl_consumer_channel *channel, | |
1118 | const char *metadata_str, /* NOT null-terminated */ | |
1119 | size_t len) /* metadata length */ | |
1120 | { | |
1121 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1122 | struct lttng_channel *chan = channel->chan; | |
1123 | const char *str = metadata_str; | |
1124 | int ret = 0, waitret; | |
1125 | size_t reserve_len, pos; | |
1126 | ||
1127 | for (pos = 0; pos < len; pos += reserve_len) { | |
1128 | reserve_len = min_t(size_t, | |
1129 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1130 | len - pos); | |
1131 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1132 | sizeof(char), -1, chan->handle, NULL); |
c9023c93 MD |
1133 | /* |
1134 | * We don't care about metadata buffer's records lost | |
1135 | * count, because we always retry here. Report error if | |
1136 | * we need to bail out after timeout or being | |
1137 | * interrupted. | |
1138 | */ | |
1139 | waitret = wait_cond_interruptible_timeout( | |
1140 | ({ | |
1141 | ret = chan->ops->event_reserve(&ctx, 0); | |
1142 | ret != -ENOBUFS || !ret; | |
1143 | }), | |
1144 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1145 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1146 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1147 | waitret == -EINTR ? "interrupted" : | |
1148 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1149 | if (waitret == -EINTR) | |
1150 | ret = waitret; | |
1151 | goto end; | |
1152 | } | |
1153 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
1154 | chan->ops->event_commit(&ctx); | |
1155 | } | |
1156 | end: | |
1157 | return ret; | |
1158 | } | |
1159 | ||
3ef94b0e JD |
1160 | /* |
1161 | * Write at most one packet in the channel. | |
1162 | * Returns the number of bytes written on success, < 0 on error. | |
1163 | */ | |
1164 | ssize_t ustctl_write_one_packet_to_channel( | |
1165 | struct ustctl_consumer_channel *channel, | |
1166 | const char *metadata_str, /* NOT null-terminated */ | |
1167 | size_t len) /* metadata length */ | |
1168 | { | |
1169 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1170 | struct lttng_channel *chan = channel->chan; | |
1171 | const char *str = metadata_str; | |
1172 | ssize_t reserve_len; | |
1173 | int ret; | |
1174 | ||
1175 | reserve_len = min_t(ssize_t, | |
1176 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1177 | len); | |
1178 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1179 | sizeof(char), -1, chan->handle, NULL); |
3ef94b0e JD |
1180 | ret = chan->ops->event_reserve(&ctx, 0); |
1181 | if (ret != 0) { | |
1182 | DBG("LTTng: event reservation failed"); | |
1183 | assert(ret < 0); | |
1184 | reserve_len = ret; | |
1185 | goto end; | |
1186 | } | |
1187 | chan->ops->event_write(&ctx, str, reserve_len); | |
1188 | chan->ops->event_commit(&ctx); | |
1189 | ||
1190 | end: | |
1191 | return reserve_len; | |
1192 | } | |
1193 | ||
ff0f5728 MD |
1194 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan) |
1195 | { | |
1196 | struct channel *chan; | |
cb7378b3 | 1197 | int ret; |
ff0f5728 MD |
1198 | |
1199 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1200 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
ff0f5728 | 1201 | chan, chan->handle); |
cb7378b3 MD |
1202 | if (!ret) |
1203 | consumer_chan->wait_fd = -1; | |
1204 | return ret; | |
ff0f5728 MD |
1205 | } |
1206 | ||
1207 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan) | |
1208 | { | |
1209 | struct channel *chan; | |
cb7378b3 | 1210 | int ret; |
ff0f5728 MD |
1211 | |
1212 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1213 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1214 | chan, chan->handle); |
cb7378b3 MD |
1215 | if (!ret) |
1216 | consumer_chan->wakeup_fd = -1; | |
1217 | return ret; | |
ff0f5728 MD |
1218 | } |
1219 | ||
74d81a6c | 1220 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
1221 | { |
1222 | struct channel *chan; | |
1223 | ||
74d81a6c | 1224 | chan = stream->chan->chan->chan; |
ff0f5728 | 1225 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
74d81a6c | 1226 | chan, stream->handle, stream->cpu); |
5224b5c8 MD |
1227 | } |
1228 | ||
74d81a6c | 1229 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 1230 | { |
66bdd22a | 1231 | struct channel *chan; |
74d81a6c MD |
1232 | |
1233 | chan = stream->chan->chan->chan; | |
ff0f5728 | 1234 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
74d81a6c MD |
1235 | chan, stream->handle, stream->cpu); |
1236 | } | |
1237 | ||
1238 | struct ustctl_consumer_stream * | |
1239 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
1240 | int cpu) | |
1241 | { | |
1242 | struct ustctl_consumer_stream *stream; | |
1243 | struct lttng_ust_shm_handle *handle; | |
1244 | struct channel *chan; | |
1245 | int shm_fd, wait_fd, wakeup_fd; | |
1246 | uint64_t memory_map_size; | |
4cfec15c | 1247 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
1248 | int ret; |
1249 | ||
74d81a6c MD |
1250 | if (!channel) |
1251 | return NULL; | |
1252 | handle = channel->chan->handle; | |
9bfc503d MD |
1253 | if (!handle) |
1254 | return NULL; | |
1255 | ||
74d81a6c | 1256 | chan = channel->chan->chan; |
6e922b24 | 1257 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
1258 | chan, cpu, handle, &shm_fd, &wait_fd, |
1259 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
1260 | if (!buf) |
1261 | return NULL; | |
74d81a6c | 1262 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1263 | if (ret) |
1264 | return NULL; | |
74d81a6c MD |
1265 | |
1266 | stream = zmalloc(sizeof(*stream)); | |
1267 | if (!stream) | |
1268 | goto alloc_error; | |
1269 | stream->handle = handle; | |
1270 | stream->buf = buf; | |
1271 | stream->chan = channel; | |
1272 | stream->shm_fd = shm_fd; | |
1273 | stream->wait_fd = wait_fd; | |
1274 | stream->wakeup_fd = wakeup_fd; | |
1275 | stream->memory_map_size = memory_map_size; | |
1276 | stream->cpu = cpu; | |
1277 | return stream; | |
1278 | ||
1279 | alloc_error: | |
1280 | return NULL; | |
1281 | } | |
1282 | ||
1283 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
1284 | { | |
1285 | struct lttng_ust_lib_ring_buffer *buf; | |
1286 | struct ustctl_consumer_channel *consumer_chan; | |
1287 | ||
1288 | assert(stream); | |
1289 | buf = stream->buf; | |
1290 | consumer_chan = stream->chan; | |
b24e4e91 MD |
1291 | (void) ustctl_stream_close_wait_fd(stream); |
1292 | (void) ustctl_stream_close_wakeup_fd(stream); | |
74d81a6c MD |
1293 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); |
1294 | free(stream); | |
6e922b24 MD |
1295 | } |
1296 | ||
ff0f5728 MD |
1297 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan) |
1298 | { | |
1299 | if (!chan) | |
1300 | return -EINVAL; | |
1301 | return shm_get_wait_fd(chan->chan->handle, | |
1302 | &chan->chan->handle->chan._ref); | |
1303 | } | |
1304 | ||
1305 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan) | |
1306 | { | |
1307 | if (!chan) | |
1308 | return -EINVAL; | |
1309 | return shm_get_wakeup_fd(chan->chan->handle, | |
1310 | &chan->chan->handle->chan._ref); | |
1311 | } | |
1312 | ||
1313 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream) | |
6e922b24 | 1314 | { |
74d81a6c MD |
1315 | struct lttng_ust_lib_ring_buffer *buf; |
1316 | struct ustctl_consumer_channel *consumer_chan; | |
1317 | ||
1318 | if (!stream) | |
1319 | return -EINVAL; | |
1320 | buf = stream->buf; | |
1321 | consumer_chan = stream->chan; | |
1322 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
1323 | } | |
1324 | ||
ff0f5728 | 1325 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
74d81a6c MD |
1326 | { |
1327 | struct lttng_ust_lib_ring_buffer *buf; | |
1328 | struct ustctl_consumer_channel *consumer_chan; | |
1329 | ||
1330 | if (!stream) | |
1331 | return -EINVAL; | |
1332 | buf = stream->buf; | |
1333 | consumer_chan = stream->chan; | |
1334 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
1335 | } |
1336 | ||
57773204 MD |
1337 | /* For mmap mode, readable without "get" operation */ |
1338 | ||
74d81a6c | 1339 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 1340 | { |
74d81a6c MD |
1341 | struct lttng_ust_lib_ring_buffer *buf; |
1342 | struct ustctl_consumer_channel *consumer_chan; | |
1343 | ||
1344 | if (!stream) | |
9bfc503d | 1345 | return NULL; |
74d81a6c MD |
1346 | buf = stream->buf; |
1347 | consumer_chan = stream->chan; | |
1348 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1349 | } |
1350 | ||
57773204 | 1351 | /* returns the length to mmap. */ |
74d81a6c | 1352 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1353 | unsigned long *len) |
1354 | { | |
74d81a6c | 1355 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1356 | unsigned long mmap_buf_len; |
66bdd22a | 1357 | struct channel *chan; |
57773204 | 1358 | |
74d81a6c | 1359 | if (!stream) |
9bfc503d | 1360 | return -EINVAL; |
74d81a6c MD |
1361 | consumer_chan = stream->chan; |
1362 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1363 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1364 | return -EINVAL; | |
1365 | mmap_buf_len = chan->backend.buf_size; | |
1366 | if (chan->backend.extra_reader_sb) | |
1367 | mmap_buf_len += chan->backend.subbuf_size; | |
1368 | if (mmap_buf_len > INT_MAX) | |
1369 | return -EFBIG; | |
1370 | *len = mmap_buf_len; | |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1375 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1376 | unsigned long *len) |
1377 | { | |
74d81a6c | 1378 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1379 | struct channel *chan; |
57773204 | 1380 | |
74d81a6c | 1381 | if (!stream) |
9bfc503d | 1382 | return -EINVAL; |
74d81a6c MD |
1383 | consumer_chan = stream->chan; |
1384 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1385 | *len = chan->backend.subbuf_size; |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | /* | |
1390 | * For mmap mode, operate on the current packet (between get/put or | |
1391 | * get_next/put_next). | |
1392 | */ | |
1393 | ||
1394 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1395 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1396 | unsigned long *off) | |
57773204 | 1397 | { |
66bdd22a | 1398 | struct channel *chan; |
57773204 | 1399 | unsigned long sb_bindex; |
74d81a6c MD |
1400 | struct lttng_ust_lib_ring_buffer *buf; |
1401 | struct ustctl_consumer_channel *consumer_chan; | |
34daae3e MD |
1402 | struct lttng_ust_lib_ring_buffer_backend_pages_shmp *barray_idx; |
1403 | struct lttng_ust_lib_ring_buffer_backend_pages *pages; | |
57773204 | 1404 | |
74d81a6c | 1405 | if (!stream) |
9bfc503d | 1406 | return -EINVAL; |
74d81a6c MD |
1407 | buf = stream->buf; |
1408 | consumer_chan = stream->chan; | |
1409 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1410 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1411 | return -EINVAL; | |
1412 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1413 | buf->backend.buf_rsb.id); |
34daae3e MD |
1414 | barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array, |
1415 | sb_bindex); | |
1416 | if (!barray_idx) | |
1417 | return -EINVAL; | |
1418 | pages = shmp(consumer_chan->chan->handle, barray_idx->shmp); | |
1419 | if (!pages) | |
1420 | return -EINVAL; | |
1421 | *off = pages->mmap_offset; | |
57773204 MD |
1422 | return 0; |
1423 | } | |
1424 | ||
1425 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1426 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1427 | unsigned long *len) | |
57773204 | 1428 | { |
74d81a6c | 1429 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1430 | struct channel *chan; |
74d81a6c | 1431 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1432 | |
74d81a6c | 1433 | if (!stream) |
9bfc503d MD |
1434 | return -EINVAL; |
1435 | ||
74d81a6c MD |
1436 | buf = stream->buf; |
1437 | consumer_chan = stream->chan; | |
1438 | chan = consumer_chan->chan->chan; | |
57773204 | 1439 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1440 | consumer_chan->chan->handle); |
57773204 MD |
1441 | return 0; |
1442 | } | |
1443 | ||
1444 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1445 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1446 | unsigned long *len) | |
57773204 | 1447 | { |
74d81a6c | 1448 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1449 | struct channel *chan; |
74d81a6c | 1450 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1451 | |
74d81a6c | 1452 | if (!stream) |
9bfc503d | 1453 | return -EINVAL; |
74d81a6c MD |
1454 | buf = stream->buf; |
1455 | consumer_chan = stream->chan; | |
1456 | chan = consumer_chan->chan->chan; | |
57773204 | 1457 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1458 | consumer_chan->chan->handle); |
57773204 MD |
1459 | *len = PAGE_ALIGN(*len); |
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1464 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1465 | { |
74d81a6c MD |
1466 | struct lttng_ust_lib_ring_buffer *buf; |
1467 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1468 | |
74d81a6c MD |
1469 | if (!stream) |
1470 | return -EINVAL; | |
1471 | buf = stream->buf; | |
1472 | consumer_chan = stream->chan; | |
1473 | return lib_ring_buffer_get_next_subbuf(buf, | |
1474 | consumer_chan->chan->handle); | |
57773204 MD |
1475 | } |
1476 | ||
1477 | ||
1478 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1479 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1480 | { |
74d81a6c MD |
1481 | struct lttng_ust_lib_ring_buffer *buf; |
1482 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1483 | |
74d81a6c MD |
1484 | if (!stream) |
1485 | return -EINVAL; | |
1486 | buf = stream->buf; | |
1487 | consumer_chan = stream->chan; | |
1488 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1489 | return 0; |
1490 | } | |
1491 | ||
1492 | /* snapshot */ | |
1493 | ||
1494 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1495 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1496 | { |
74d81a6c MD |
1497 | struct lttng_ust_lib_ring_buffer *buf; |
1498 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1499 | |
74d81a6c MD |
1500 | if (!stream) |
1501 | return -EINVAL; | |
1502 | buf = stream->buf; | |
1503 | consumer_chan = stream->chan; | |
57773204 | 1504 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1505 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1506 | } |
1507 | ||
f45930b7 JG |
1508 | /* |
1509 | * Get a snapshot of the current ring buffer producer and consumer positions | |
1510 | * even if the consumed and produced positions are contained within the same | |
1511 | * subbuffer. | |
1512 | */ | |
1513 | int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream) | |
1514 | { | |
1515 | struct lttng_ust_lib_ring_buffer *buf; | |
1516 | struct ustctl_consumer_channel *consumer_chan; | |
1517 | ||
1518 | if (!stream) | |
1519 | return -EINVAL; | |
1520 | buf = stream->buf; | |
1521 | consumer_chan = stream->chan; | |
1522 | return lib_ring_buffer_snapshot_sample_positions(buf, | |
1523 | &buf->cons_snapshot, &buf->prod_snapshot, | |
1524 | consumer_chan->chan->handle); | |
1525 | } | |
1526 | ||
57773204 | 1527 | /* Get the consumer position (iteration start) */ |
74d81a6c MD |
1528 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1529 | unsigned long *pos) | |
57773204 | 1530 | { |
74d81a6c | 1531 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1532 | |
74d81a6c MD |
1533 | if (!stream) |
1534 | return -EINVAL; | |
1535 | buf = stream->buf; | |
57773204 MD |
1536 | *pos = buf->cons_snapshot; |
1537 | return 0; | |
1538 | } | |
1539 | ||
1540 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1541 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1542 | unsigned long *pos) | |
57773204 | 1543 | { |
74d81a6c | 1544 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1545 | |
74d81a6c MD |
1546 | if (!stream) |
1547 | return -EINVAL; | |
1548 | buf = stream->buf; | |
57773204 MD |
1549 | *pos = buf->prod_snapshot; |
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1554 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1555 | unsigned long *pos) | |
57773204 | 1556 | { |
74d81a6c MD |
1557 | struct lttng_ust_lib_ring_buffer *buf; |
1558 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1559 | |
74d81a6c MD |
1560 | if (!stream) |
1561 | return -EINVAL; | |
1562 | buf = stream->buf; | |
1563 | consumer_chan = stream->chan; | |
1564 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1565 | consumer_chan->chan->handle); | |
57773204 MD |
1566 | } |
1567 | ||
1568 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1569 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1570 | { |
74d81a6c MD |
1571 | struct lttng_ust_lib_ring_buffer *buf; |
1572 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1573 | |
74d81a6c MD |
1574 | if (!stream) |
1575 | return -EINVAL; | |
1576 | buf = stream->buf; | |
1577 | consumer_chan = stream->chan; | |
1578 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1579 | return 0; |
1580 | } | |
1581 | ||
74d81a6c | 1582 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1583 | int producer_active) |
57773204 | 1584 | { |
74d81a6c MD |
1585 | struct lttng_ust_lib_ring_buffer *buf; |
1586 | struct ustctl_consumer_channel *consumer_chan; | |
1587 | ||
1588 | assert(stream); | |
1589 | buf = stream->buf; | |
1590 | consumer_chan = stream->chan; | |
b52190f2 MD |
1591 | lib_ring_buffer_switch_slow(buf, |
1592 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1593 | consumer_chan->chan->handle); |
1594 | } | |
1595 | ||
beca55a1 MD |
1596 | void ustctl_clear_buffer(struct ustctl_consumer_stream *stream) |
1597 | { | |
1598 | struct lttng_ust_lib_ring_buffer *buf; | |
1599 | struct ustctl_consumer_channel *consumer_chan; | |
1600 | ||
1601 | assert(stream); | |
1602 | buf = stream->buf; | |
1603 | consumer_chan = stream->chan; | |
1604 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, | |
1605 | consumer_chan->chan->handle); | |
1606 | lib_ring_buffer_clear_reader(buf, consumer_chan->chan->handle); | |
1607 | } | |
1608 | ||
b2f3252a JD |
1609 | static |
1610 | struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb( | |
1611 | struct lttng_ust_lib_ring_buffer *buf, | |
1612 | struct lttng_ust_shm_handle *handle) | |
1613 | { | |
1614 | struct channel *chan; | |
1615 | const struct lttng_ust_lib_ring_buffer_config *config; | |
1616 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1617 | ||
1618 | chan = shmp(handle, buf->backend.chan); | |
34daae3e MD |
1619 | if (!chan) |
1620 | return NULL; | |
b2f3252a JD |
1621 | config = &chan->backend.config; |
1622 | if (!config->cb_ptr) | |
1623 | return NULL; | |
1624 | client_cb = caa_container_of(config->cb_ptr, | |
1625 | struct lttng_ust_client_lib_ring_buffer_client_cb, | |
1626 | parent); | |
1627 | return client_cb; | |
1628 | } | |
1629 | ||
1630 | int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream, | |
1631 | uint64_t *timestamp_begin) | |
1632 | { | |
1633 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1634 | struct lttng_ust_lib_ring_buffer *buf; |
1635 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1636 | |
1637 | if (!stream || !timestamp_begin) | |
1638 | return -EINVAL; | |
e1919a41 MD |
1639 | buf = stream->buf; |
1640 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1641 | client_cb = get_client_cb(buf, handle); |
1642 | if (!client_cb) | |
1643 | return -ENOSYS; | |
1644 | return client_cb->timestamp_begin(buf, handle, timestamp_begin); | |
1645 | } | |
1646 | ||
1647 | int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream, | |
1648 | uint64_t *timestamp_end) | |
1649 | { | |
1650 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1651 | struct lttng_ust_lib_ring_buffer *buf; |
1652 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1653 | |
1654 | if (!stream || !timestamp_end) | |
1655 | return -EINVAL; | |
e1919a41 MD |
1656 | buf = stream->buf; |
1657 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1658 | client_cb = get_client_cb(buf, handle); |
1659 | if (!client_cb) | |
1660 | return -ENOSYS; | |
1661 | return client_cb->timestamp_end(buf, handle, timestamp_end); | |
1662 | } | |
1663 | ||
1664 | int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream, | |
1665 | uint64_t *events_discarded) | |
1666 | { | |
1667 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1668 | struct lttng_ust_lib_ring_buffer *buf; |
1669 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1670 | |
1671 | if (!stream || !events_discarded) | |
1672 | return -EINVAL; | |
e1919a41 MD |
1673 | buf = stream->buf; |
1674 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1675 | client_cb = get_client_cb(buf, handle); |
1676 | if (!client_cb) | |
1677 | return -ENOSYS; | |
1678 | return client_cb->events_discarded(buf, handle, events_discarded); | |
1679 | } | |
1680 | ||
1681 | int ustctl_get_content_size(struct ustctl_consumer_stream *stream, | |
1682 | uint64_t *content_size) | |
1683 | { | |
1684 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1685 | struct lttng_ust_lib_ring_buffer *buf; |
1686 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1687 | |
1688 | if (!stream || !content_size) | |
1689 | return -EINVAL; | |
e1919a41 MD |
1690 | buf = stream->buf; |
1691 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1692 | client_cb = get_client_cb(buf, handle); |
1693 | if (!client_cb) | |
1694 | return -ENOSYS; | |
1695 | return client_cb->content_size(buf, handle, content_size); | |
1696 | } | |
1697 | ||
1698 | int ustctl_get_packet_size(struct ustctl_consumer_stream *stream, | |
1699 | uint64_t *packet_size) | |
1700 | { | |
1701 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1702 | struct lttng_ust_lib_ring_buffer *buf; |
1703 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1704 | |
1705 | if (!stream || !packet_size) | |
1706 | return -EINVAL; | |
e1919a41 MD |
1707 | buf = stream->buf; |
1708 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1709 | client_cb = get_client_cb(buf, handle); |
1710 | if (!client_cb) | |
1711 | return -ENOSYS; | |
1712 | return client_cb->packet_size(buf, handle, packet_size); | |
1713 | } | |
1714 | ||
1715 | int ustctl_get_stream_id(struct ustctl_consumer_stream *stream, | |
1716 | uint64_t *stream_id) | |
1717 | { | |
1718 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1719 | struct lttng_ust_lib_ring_buffer *buf; |
1720 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1721 | |
1722 | if (!stream || !stream_id) | |
1723 | return -EINVAL; | |
e1919a41 MD |
1724 | buf = stream->buf; |
1725 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1726 | client_cb = get_client_cb(buf, handle); |
1727 | if (!client_cb) | |
1728 | return -ENOSYS; | |
1729 | return client_cb->stream_id(buf, handle, stream_id); | |
1730 | } | |
1731 | ||
fca361e8 JD |
1732 | int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream, |
1733 | uint64_t *ts) | |
1734 | { | |
1735 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1736 | struct lttng_ust_lib_ring_buffer *buf; |
1737 | struct lttng_ust_shm_handle *handle; | |
fca361e8 JD |
1738 | |
1739 | if (!stream || !ts) | |
1740 | return -EINVAL; | |
e1919a41 MD |
1741 | buf = stream->buf; |
1742 | handle = stream->chan->chan->handle; | |
fca361e8 JD |
1743 | client_cb = get_client_cb(buf, handle); |
1744 | if (!client_cb || !client_cb->current_timestamp) | |
1745 | return -ENOSYS; | |
1746 | return client_cb->current_timestamp(buf, handle, ts); | |
1747 | } | |
1748 | ||
1ff31389 JD |
1749 | int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream, |
1750 | uint64_t *seq) | |
1751 | { | |
1752 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1753 | struct lttng_ust_lib_ring_buffer *buf; | |
1754 | struct lttng_ust_shm_handle *handle; | |
1755 | ||
1756 | if (!stream || !seq) | |
1757 | return -EINVAL; | |
1758 | buf = stream->buf; | |
1759 | handle = stream->chan->chan->handle; | |
1760 | client_cb = get_client_cb(buf, handle); | |
1761 | if (!client_cb || !client_cb->sequence_number) | |
1762 | return -ENOSYS; | |
1763 | return client_cb->sequence_number(buf, handle, seq); | |
1764 | } | |
1765 | ||
45a00b05 JD |
1766 | int ustctl_get_instance_id(struct ustctl_consumer_stream *stream, |
1767 | uint64_t *id) | |
1768 | { | |
1769 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1770 | struct lttng_ust_lib_ring_buffer *buf; | |
1771 | struct lttng_ust_shm_handle *handle; | |
1772 | ||
1773 | if (!stream || !id) | |
1774 | return -EINVAL; | |
1775 | buf = stream->buf; | |
1776 | handle = stream->chan->chan->handle; | |
1777 | client_cb = get_client_cb(buf, handle); | |
1778 | if (!client_cb) | |
1779 | return -ENOSYS; | |
1780 | return client_cb->instance_id(buf, handle, id); | |
1781 | } | |
1782 | ||
c62a3816 | 1783 | #ifdef LTTNG_UST_HAVE_PERF_EVENT |
57201bb3 MD |
1784 | |
1785 | int ustctl_has_perf_counters(void) | |
1786 | { | |
1787 | return 1; | |
1788 | } | |
1789 | ||
1790 | #else | |
1791 | ||
1792 | int ustctl_has_perf_counters(void) | |
1793 | { | |
1794 | return 0; | |
1795 | } | |
1796 | ||
1797 | #endif | |
1798 | ||
32ce8569 MD |
1799 | /* |
1800 | * Returns 0 on success, negative error value on error. | |
1801 | */ | |
1802 | int ustctl_recv_reg_msg(int sock, | |
1803 | enum ustctl_socket_type *type, | |
1804 | uint32_t *major, | |
1805 | uint32_t *minor, | |
1806 | uint32_t *pid, | |
1807 | uint32_t *ppid, | |
1808 | uint32_t *uid, | |
1809 | uint32_t *gid, | |
1810 | uint32_t *bits_per_long, | |
1811 | uint32_t *uint8_t_alignment, | |
1812 | uint32_t *uint16_t_alignment, | |
1813 | uint32_t *uint32_t_alignment, | |
1814 | uint32_t *uint64_t_alignment, | |
1815 | uint32_t *long_alignment, | |
1816 | int *byte_order, | |
1817 | char *name) | |
1818 | { | |
1819 | ssize_t len; | |
1820 | struct ustctl_reg_msg reg_msg; | |
1821 | ||
1822 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
1823 | if (len > 0 && len != sizeof(reg_msg)) | |
1824 | return -EIO; | |
1825 | if (len == 0) | |
1826 | return -EPIPE; | |
1827 | if (len < 0) | |
1828 | return len; | |
1829 | ||
1830 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
1831 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1832 | BIG_ENDIAN : LITTLE_ENDIAN; | |
1833 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
1834 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1835 | LITTLE_ENDIAN : BIG_ENDIAN; | |
1836 | } else { | |
1837 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
1838 | } | |
1839 | switch (reg_msg.socket_type) { | |
1840 | case 0: *type = USTCTL_SOCKET_CMD; | |
1841 | break; | |
1842 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
1843 | break; | |
1844 | default: | |
1845 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
1846 | } | |
1847 | *major = reg_msg.major; | |
1848 | *minor = reg_msg.minor; | |
1849 | *pid = reg_msg.pid; | |
1850 | *ppid = reg_msg.ppid; | |
1851 | *uid = reg_msg.uid; | |
1852 | *gid = reg_msg.gid; | |
1853 | *bits_per_long = reg_msg.bits_per_long; | |
1854 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
1855 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
1856 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
1857 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
1858 | *long_alignment = reg_msg.long_alignment; | |
1859 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
6a359b8a MD |
1860 | if (reg_msg.major < LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE || |
1861 | reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) { | |
32ce8569 MD |
1862 | return -LTTNG_UST_ERR_UNSUP_MAJOR; |
1863 | } | |
1864 | ||
1865 | return 0; | |
1866 | } | |
1867 | ||
1868 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
1869 | { | |
1870 | struct ustcomm_notify_hdr header; | |
1871 | ssize_t len; | |
1872 | ||
1873 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
1874 | if (len > 0 && len != sizeof(header)) | |
1875 | return -EIO; | |
1876 | if (len == 0) | |
1877 | return -EPIPE; | |
1878 | if (len < 0) | |
1879 | return len; | |
1880 | switch (header.notify_cmd) { | |
1881 | case 0: | |
1882 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1883 | break; | |
1884 | case 1: | |
1885 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1886 | break; | |
c785c634 MD |
1887 | case 2: |
1888 | *notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1889 | break; | |
32ce8569 MD |
1890 | default: |
1891 | return -EINVAL; | |
1892 | } | |
1893 | return 0; | |
1894 | } | |
1895 | ||
1896 | /* | |
1897 | * Returns 0 on success, negative error value on error. | |
1898 | */ | |
1899 | int ustctl_recv_register_event(int sock, | |
1900 | int *session_objd, | |
1901 | int *channel_objd, | |
1902 | char *event_name, | |
1903 | int *loglevel, | |
1904 | char **signature, | |
1905 | size_t *nr_fields, | |
1906 | struct ustctl_field **fields, | |
1907 | char **model_emf_uri) | |
1908 | { | |
1909 | ssize_t len; | |
1910 | struct ustcomm_notify_event_msg msg; | |
1911 | size_t signature_len, fields_len, model_emf_uri_len; | |
1912 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
1913 | struct ustctl_field *a_fields = NULL; | |
1914 | ||
1915 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1916 | if (len > 0 && len != sizeof(msg)) | |
1917 | return -EIO; | |
1918 | if (len == 0) | |
1919 | return -EPIPE; | |
1920 | if (len < 0) | |
1921 | return len; | |
1922 | ||
1923 | *session_objd = msg.session_objd; | |
1924 | *channel_objd = msg.channel_objd; | |
1925 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1926 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1927 | *loglevel = msg.loglevel; | |
1928 | signature_len = msg.signature_len; | |
1929 | fields_len = msg.fields_len; | |
1930 | ||
1931 | if (fields_len % sizeof(*a_fields) != 0) { | |
1932 | return -EINVAL; | |
1933 | } | |
1934 | ||
1935 | model_emf_uri_len = msg.model_emf_uri_len; | |
1936 | ||
1937 | /* recv signature. contains at least \0. */ | |
1938 | a_sign = zmalloc(signature_len); | |
1939 | if (!a_sign) | |
1940 | return -ENOMEM; | |
1941 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
1942 | if (len > 0 && len != signature_len) { | |
1943 | len = -EIO; | |
1944 | goto signature_error; | |
1945 | } | |
1946 | if (len == 0) { | |
1947 | len = -EPIPE; | |
1948 | goto signature_error; | |
1949 | } | |
1950 | if (len < 0) { | |
1951 | goto signature_error; | |
1952 | } | |
1953 | /* Enforce end of string */ | |
111198c2 | 1954 | a_sign[signature_len - 1] = '\0'; |
32ce8569 MD |
1955 | |
1956 | /* recv fields */ | |
1957 | if (fields_len) { | |
1958 | a_fields = zmalloc(fields_len); | |
1959 | if (!a_fields) { | |
1960 | len = -ENOMEM; | |
1961 | goto signature_error; | |
1962 | } | |
1963 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1964 | if (len > 0 && len != fields_len) { | |
1965 | len = -EIO; | |
1966 | goto fields_error; | |
1967 | } | |
1968 | if (len == 0) { | |
1969 | len = -EPIPE; | |
1970 | goto fields_error; | |
1971 | } | |
1972 | if (len < 0) { | |
1973 | goto fields_error; | |
1974 | } | |
1975 | } | |
1976 | ||
1977 | if (model_emf_uri_len) { | |
1978 | /* recv model_emf_uri_len */ | |
1979 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
1980 | if (!a_model_emf_uri) { | |
1981 | len = -ENOMEM; | |
1982 | goto fields_error; | |
1983 | } | |
1984 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
1985 | model_emf_uri_len); | |
1986 | if (len > 0 && len != model_emf_uri_len) { | |
1987 | len = -EIO; | |
1988 | goto model_error; | |
1989 | } | |
1990 | if (len == 0) { | |
1991 | len = -EPIPE; | |
1992 | goto model_error; | |
1993 | } | |
1994 | if (len < 0) { | |
1995 | goto model_error; | |
1996 | } | |
1997 | /* Enforce end of string */ | |
1998 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
1999 | } | |
2000 | ||
2001 | *signature = a_sign; | |
2002 | *nr_fields = fields_len / sizeof(*a_fields); | |
2003 | *fields = a_fields; | |
2004 | *model_emf_uri = a_model_emf_uri; | |
2005 | ||
2006 | return 0; | |
2007 | ||
2008 | model_error: | |
2009 | free(a_model_emf_uri); | |
2010 | fields_error: | |
2011 | free(a_fields); | |
2012 | signature_error: | |
2013 | free(a_sign); | |
2014 | return len; | |
2015 | } | |
2016 | ||
2017 | /* | |
2018 | * Returns 0 on success, negative error value on error. | |
2019 | */ | |
2020 | int ustctl_reply_register_event(int sock, | |
2021 | uint32_t id, | |
2022 | int ret_code) | |
2023 | { | |
2024 | ssize_t len; | |
2025 | struct { | |
2026 | struct ustcomm_notify_hdr header; | |
2027 | struct ustcomm_notify_event_reply r; | |
2028 | } reply; | |
2029 | ||
2030 | memset(&reply, 0, sizeof(reply)); | |
2031 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
2032 | reply.r.ret_code = ret_code; | |
2033 | reply.r.event_id = id; | |
2034 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2035 | if (len > 0 && len != sizeof(reply)) | |
2036 | return -EIO; | |
2037 | if (len < 0) | |
2038 | return len; | |
2039 | return 0; | |
2040 | } | |
2041 | ||
c785c634 MD |
2042 | /* |
2043 | * Returns 0 on success, negative UST or system error value on error. | |
2044 | */ | |
2045 | int ustctl_recv_register_enum(int sock, | |
2046 | int *session_objd, | |
2047 | char *enum_name, | |
2048 | struct ustctl_enum_entry **entries, | |
2049 | size_t *nr_entries) | |
2050 | { | |
2051 | ssize_t len; | |
2052 | struct ustcomm_notify_enum_msg msg; | |
2053 | size_t entries_len; | |
2054 | struct ustctl_enum_entry *a_entries = NULL; | |
2055 | ||
2056 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2057 | if (len > 0 && len != sizeof(msg)) | |
2058 | return -EIO; | |
2059 | if (len == 0) | |
2060 | return -EPIPE; | |
2061 | if (len < 0) | |
2062 | return len; | |
2063 | ||
2064 | *session_objd = msg.session_objd; | |
2065 | strncpy(enum_name, msg.enum_name, LTTNG_UST_SYM_NAME_LEN); | |
2066 | enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2067 | entries_len = msg.entries_len; | |
2068 | ||
2069 | if (entries_len % sizeof(*a_entries) != 0) { | |
2070 | return -EINVAL; | |
2071 | } | |
2072 | ||
2073 | /* recv entries */ | |
2074 | if (entries_len) { | |
2075 | a_entries = zmalloc(entries_len); | |
2076 | if (!a_entries) | |
2077 | return -ENOMEM; | |
2078 | len = ustcomm_recv_unix_sock(sock, a_entries, entries_len); | |
2079 | if (len > 0 && len != entries_len) { | |
2080 | len = -EIO; | |
2081 | goto entries_error; | |
2082 | } | |
2083 | if (len == 0) { | |
2084 | len = -EPIPE; | |
2085 | goto entries_error; | |
2086 | } | |
2087 | if (len < 0) { | |
2088 | goto entries_error; | |
2089 | } | |
2090 | } | |
2091 | *nr_entries = entries_len / sizeof(*a_entries); | |
2092 | *entries = a_entries; | |
2093 | ||
2094 | return 0; | |
2095 | ||
2096 | entries_error: | |
2097 | free(a_entries); | |
2098 | return len; | |
2099 | } | |
2100 | ||
2101 | /* | |
2102 | * Returns 0 on success, negative error value on error. | |
2103 | */ | |
2104 | int ustctl_reply_register_enum(int sock, | |
2105 | uint64_t id, | |
2106 | int ret_code) | |
2107 | { | |
2108 | ssize_t len; | |
2109 | struct { | |
2110 | struct ustcomm_notify_hdr header; | |
2111 | struct ustcomm_notify_enum_reply r; | |
2112 | } reply; | |
2113 | ||
2114 | memset(&reply, 0, sizeof(reply)); | |
2115 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
2116 | reply.r.ret_code = ret_code; | |
2117 | reply.r.enum_id = id; | |
2118 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2119 | if (len > 0 && len != sizeof(reply)) | |
2120 | return -EIO; | |
2121 | if (len < 0) | |
2122 | return len; | |
2123 | return 0; | |
2124 | } | |
2125 | ||
32ce8569 MD |
2126 | /* |
2127 | * Returns 0 on success, negative UST or system error value on error. | |
2128 | */ | |
2129 | int ustctl_recv_register_channel(int sock, | |
2130 | int *session_objd, /* session descriptor (output) */ | |
2131 | int *channel_objd, /* channel descriptor (output) */ | |
2132 | size_t *nr_fields, | |
2133 | struct ustctl_field **fields) | |
2134 | { | |
2135 | ssize_t len; | |
2136 | struct ustcomm_notify_channel_msg msg; | |
2137 | size_t fields_len; | |
2138 | struct ustctl_field *a_fields; | |
2139 | ||
2140 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2141 | if (len > 0 && len != sizeof(msg)) | |
2142 | return -EIO; | |
2143 | if (len == 0) | |
2144 | return -EPIPE; | |
2145 | if (len < 0) | |
2146 | return len; | |
2147 | ||
2148 | *session_objd = msg.session_objd; | |
2149 | *channel_objd = msg.channel_objd; | |
2150 | fields_len = msg.ctx_fields_len; | |
2151 | ||
2152 | if (fields_len % sizeof(*a_fields) != 0) { | |
2153 | return -EINVAL; | |
2154 | } | |
2155 | ||
2156 | /* recv fields */ | |
2157 | if (fields_len) { | |
2158 | a_fields = zmalloc(fields_len); | |
2159 | if (!a_fields) { | |
2160 | len = -ENOMEM; | |
2161 | goto alloc_error; | |
2162 | } | |
2163 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2164 | if (len > 0 && len != fields_len) { | |
2165 | len = -EIO; | |
2166 | goto fields_error; | |
2167 | } | |
2168 | if (len == 0) { | |
2169 | len = -EPIPE; | |
2170 | goto fields_error; | |
2171 | } | |
2172 | if (len < 0) { | |
2173 | goto fields_error; | |
2174 | } | |
2175 | *fields = a_fields; | |
2176 | } else { | |
2177 | *fields = NULL; | |
2178 | } | |
2179 | *nr_fields = fields_len / sizeof(*a_fields); | |
2180 | return 0; | |
2181 | ||
2182 | fields_error: | |
2183 | free(a_fields); | |
2184 | alloc_error: | |
2185 | return len; | |
2186 | } | |
2187 | ||
2188 | /* | |
2189 | * Returns 0 on success, negative error value on error. | |
2190 | */ | |
2191 | int ustctl_reply_register_channel(int sock, | |
2192 | uint32_t chan_id, | |
2193 | enum ustctl_channel_header header_type, | |
2194 | int ret_code) | |
2195 | { | |
2196 | ssize_t len; | |
2197 | struct { | |
2198 | struct ustcomm_notify_hdr header; | |
2199 | struct ustcomm_notify_channel_reply r; | |
2200 | } reply; | |
2201 | ||
2202 | memset(&reply, 0, sizeof(reply)); | |
2203 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
2204 | reply.r.ret_code = ret_code; | |
2205 | reply.r.chan_id = chan_id; | |
2206 | switch (header_type) { | |
2207 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
2208 | reply.r.header_type = 1; | |
2209 | break; | |
2210 | case USTCTL_CHANNEL_HEADER_LARGE: | |
2211 | reply.r.header_type = 2; | |
2212 | break; | |
2213 | default: | |
2214 | reply.r.header_type = 0; | |
2215 | break; | |
2216 | } | |
2217 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2218 | if (len > 0 && len != sizeof(reply)) | |
2219 | return -EIO; | |
2220 | if (len < 0) | |
2221 | return len; | |
2222 | return 0; | |
2223 | } | |
2224 | ||
f53329f3 JD |
2225 | /* Regenerate the statedump. */ |
2226 | int ustctl_regenerate_statedump(int sock, int handle) | |
2227 | { | |
2228 | struct ustcomm_ust_msg lum; | |
2229 | struct ustcomm_ust_reply lur; | |
2230 | int ret; | |
2231 | ||
2232 | memset(&lum, 0, sizeof(lum)); | |
2233 | lum.handle = handle; | |
2234 | lum.cmd = LTTNG_UST_SESSION_STATEDUMP; | |
2235 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
2236 | if (ret) | |
2237 | return ret; | |
2238 | DBG("Regenerated statedump for handle %u", handle); | |
2239 | return 0; | |
2240 | } | |
2241 | ||
74d81a6c MD |
2242 | static __attribute__((constructor)) |
2243 | void ustctl_init(void) | |
2244 | { | |
2245 | init_usterr(); | |
6f626d28 | 2246 | lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */ |
f9364363 | 2247 | lttng_ust_clock_init(); |
74d81a6c MD |
2248 | lttng_ring_buffer_metadata_client_init(); |
2249 | lttng_ring_buffer_client_overwrite_init(); | |
34a91bdb | 2250 | lttng_ring_buffer_client_overwrite_rt_init(); |
74d81a6c | 2251 | lttng_ring_buffer_client_discard_init(); |
34a91bdb | 2252 | lttng_ring_buffer_client_discard_rt_init(); |
03d2d293 | 2253 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
2254 | } |
2255 | ||
2256 | static __attribute__((destructor)) | |
2257 | void ustctl_exit(void) | |
2258 | { | |
34a91bdb | 2259 | lttng_ring_buffer_client_discard_rt_exit(); |
74d81a6c | 2260 | lttng_ring_buffer_client_discard_exit(); |
34a91bdb | 2261 | lttng_ring_buffer_client_overwrite_rt_exit(); |
74d81a6c MD |
2262 | lttng_ring_buffer_client_overwrite_exit(); |
2263 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 2264 | } |