Commit | Line | Data |
---|---|---|
57773204 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
74d81a6c | 3 | * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
57773204 | 4 | * |
e92f3e28 MD |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; version 2 of the License only. | |
57773204 MD |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
e92f3e28 MD |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
57773204 MD |
17 | */ |
18 | ||
9d335227 | 19 | #define _GNU_SOURCE |
fb31eb73 | 20 | #include <stdint.h> |
57773204 | 21 | #include <string.h> |
fb31eb73 | 22 | #include <sys/mman.h> |
4e79769f | 23 | #include <unistd.h> |
fb31eb73 | 24 | |
c62a3816 | 25 | #include <lttng/ust-config.h> |
4318ae1b MD |
26 | #include <lttng/ust-ctl.h> |
27 | #include <lttng/ust-abi.h> | |
c1fca457 | 28 | #include <lttng/ust-events.h> |
3208818b | 29 | #include <lttng/ust-endian.h> |
44c72f10 | 30 | #include <usterr-signal-safe.h> |
b728d87e | 31 | #include <ust-comm.h> |
74d81a6c | 32 | #include <helper.h> |
57773204 MD |
33 | |
34 | #include "../libringbuffer/backend.h" | |
35 | #include "../libringbuffer/frontend.h" | |
c9023c93 | 36 | #include "../liblttng-ust/wait.h" |
b2f3252a | 37 | #include "../liblttng-ust/lttng-rb-clients.h" |
f9364363 | 38 | #include "../liblttng-ust/clock.h" |
92ce256d | 39 | #include "../liblttng-ust/getenv.h" |
c9023c93 MD |
40 | |
41 | /* | |
42 | * Number of milliseconds to retry before failing metadata writes on | |
43 | * buffer full condition. (10 seconds) | |
44 | */ | |
45 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 | |
57773204 | 46 | |
74d81a6c MD |
47 | /* |
48 | * Channel representation within consumer. | |
49 | */ | |
50 | struct ustctl_consumer_channel { | |
51 | struct lttng_channel *chan; /* lttng channel buffers */ | |
6b120308 | 52 | |
74d81a6c MD |
53 | /* initial attributes */ |
54 | struct ustctl_consumer_channel_attr attr; | |
ff0f5728 MD |
55 | int wait_fd; /* monitor close() */ |
56 | int wakeup_fd; /* monitor close() */ | |
74d81a6c MD |
57 | }; |
58 | ||
59 | /* | |
60 | * Stream representation within consumer. | |
61 | */ | |
62 | struct ustctl_consumer_stream { | |
63 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
64 | struct lttng_ust_lib_ring_buffer *buf; | |
65 | struct ustctl_consumer_channel *chan; | |
66 | int shm_fd, wait_fd, wakeup_fd; | |
67 | int cpu; | |
68 | uint64_t memory_map_size; | |
69 | }; | |
70 | ||
71 | extern void lttng_ring_buffer_client_overwrite_init(void); | |
08a3170c | 72 | extern void lttng_ring_buffer_client_overwrite_rt_init(void); |
74d81a6c | 73 | extern void lttng_ring_buffer_client_discard_init(void); |
08a3170c | 74 | extern void lttng_ring_buffer_client_discard_rt_init(void); |
74d81a6c MD |
75 | extern void lttng_ring_buffer_metadata_client_init(void); |
76 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
08a3170c | 77 | extern void lttng_ring_buffer_client_overwrite_rt_exit(void); |
74d81a6c | 78 | extern void lttng_ring_buffer_client_discard_exit(void); |
08a3170c | 79 | extern void lttng_ring_buffer_client_discard_rt_exit(void); |
74d81a6c MD |
80 | extern void lttng_ring_buffer_metadata_client_exit(void); |
81 | ||
2be0e72c MD |
82 | int ustctl_release_handle(int sock, int handle) |
83 | { | |
84 | struct ustcomm_ust_msg lum; | |
85 | struct ustcomm_ust_reply lur; | |
2be0e72c | 86 | |
74d81a6c MD |
87 | if (sock < 0 || handle < 0) |
88 | return 0; | |
89 | memset(&lum, 0, sizeof(lum)); | |
90 | lum.handle = handle; | |
91 | lum.cmd = LTTNG_UST_RELEASE; | |
92 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 93 | } |
74d81a6c | 94 | |
12388166 MD |
95 | /* |
96 | * If sock is negative, it means we don't have to notify the other side | |
97 | * (e.g. application has already vanished). | |
98 | */ | |
d26228ae | 99 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 100 | { |
57773204 MD |
101 | int ret; |
102 | ||
9bfc503d MD |
103 | if (!data) |
104 | return -EINVAL; | |
105 | ||
74d81a6c MD |
106 | switch (data->type) { |
107 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
ff0f5728 MD |
108 | if (data->u.channel.wakeup_fd >= 0) { |
109 | ret = close(data->u.channel.wakeup_fd); | |
110 | if (ret < 0) { | |
111 | ret = -errno; | |
112 | return ret; | |
113 | } | |
dd6c697c | 114 | data->u.channel.wakeup_fd = -1; |
ff0f5728 | 115 | } |
74d81a6c | 116 | free(data->u.channel.data); |
dd6c697c | 117 | data->u.channel.data = NULL; |
74d81a6c MD |
118 | break; |
119 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
120 | if (data->u.stream.shm_fd >= 0) { | |
121 | ret = close(data->u.stream.shm_fd); | |
122 | if (ret < 0) { | |
123 | ret = -errno; | |
124 | return ret; | |
125 | } | |
dd6c697c | 126 | data->u.stream.shm_fd = -1; |
d26228ae | 127 | } |
74d81a6c MD |
128 | if (data->u.stream.wakeup_fd >= 0) { |
129 | ret = close(data->u.stream.wakeup_fd); | |
130 | if (ret < 0) { | |
131 | ret = -errno; | |
132 | return ret; | |
133 | } | |
dd6c697c | 134 | data->u.stream.wakeup_fd = -1; |
d26228ae | 135 | } |
74d81a6c | 136 | break; |
32ce8569 MD |
137 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
138 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
139 | break; | |
74d81a6c MD |
140 | default: |
141 | assert(0); | |
d26228ae | 142 | } |
2be0e72c | 143 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
144 | } |
145 | ||
1c5e467e MD |
146 | /* |
147 | * Send registration done packet to the application. | |
148 | */ | |
149 | int ustctl_register_done(int sock) | |
150 | { | |
151 | struct ustcomm_ust_msg lum; | |
152 | struct ustcomm_ust_reply lur; | |
153 | int ret; | |
154 | ||
155 | DBG("Sending register done command to %d", sock); | |
156 | memset(&lum, 0, sizeof(lum)); | |
157 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
158 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
159 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
160 | if (ret) | |
161 | return ret; | |
1c5e467e | 162 | return 0; |
1c5e467e MD |
163 | } |
164 | ||
57773204 MD |
165 | /* |
166 | * returns session handle. | |
167 | */ | |
168 | int ustctl_create_session(int sock) | |
169 | { | |
170 | struct ustcomm_ust_msg lum; | |
171 | struct ustcomm_ust_reply lur; | |
172 | int ret, session_handle; | |
173 | ||
174 | /* Create session */ | |
175 | memset(&lum, 0, sizeof(lum)); | |
176 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
177 | lum.cmd = LTTNG_UST_SESSION; | |
178 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
179 | if (ret) | |
180 | return ret; | |
181 | session_handle = lur.ret_val; | |
182 | DBG("received session handle %u", session_handle); | |
183 | return session_handle; | |
184 | } | |
185 | ||
57773204 | 186 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
187 | struct lttng_ust_object_data *channel_data, |
188 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
189 | { |
190 | struct ustcomm_ust_msg lum; | |
191 | struct ustcomm_ust_reply lur; | |
61f02aea | 192 | struct lttng_ust_object_data *event_data; |
57773204 MD |
193 | int ret; |
194 | ||
9bfc503d MD |
195 | if (!channel_data || !_event_data) |
196 | return -EINVAL; | |
197 | ||
74d81a6c | 198 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
199 | if (!event_data) |
200 | return -ENOMEM; | |
32ce8569 | 201 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
202 | memset(&lum, 0, sizeof(lum)); |
203 | lum.handle = channel_data->handle; | |
204 | lum.cmd = LTTNG_UST_EVENT; | |
205 | strncpy(lum.u.event.name, ev->name, | |
206 | LTTNG_UST_SYM_NAME_LEN); | |
207 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
208 | lum.u.event.loglevel_type = ev->loglevel_type; |
209 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
210 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
211 | if (ret) { | |
212 | free(event_data); | |
213 | return ret; | |
214 | } | |
215 | event_data->handle = lur.ret_val; | |
216 | DBG("received event handle %u", event_data->handle); | |
217 | *_event_data = event_data; | |
218 | return 0; | |
219 | } | |
220 | ||
53f0df51 | 221 | int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
61f02aea MD |
222 | struct lttng_ust_object_data *obj_data, |
223 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
224 | { |
225 | struct ustcomm_ust_msg lum; | |
226 | struct ustcomm_ust_reply lur; | |
53f0df51 JG |
227 | struct lttng_ust_object_data *context_data = NULL; |
228 | char *buf = NULL; | |
229 | size_t len; | |
57773204 MD |
230 | int ret; |
231 | ||
53f0df51 JG |
232 | if (!obj_data || !_context_data) { |
233 | ret = -EINVAL; | |
234 | goto end; | |
235 | } | |
9bfc503d | 236 | |
74d81a6c | 237 | context_data = zmalloc(sizeof(*context_data)); |
53f0df51 JG |
238 | if (!context_data) { |
239 | ret = -ENOMEM; | |
240 | goto end; | |
241 | } | |
32ce8569 | 242 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 243 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 244 | lum.handle = obj_data->handle; |
57773204 | 245 | lum.cmd = LTTNG_UST_CONTEXT; |
53f0df51 JG |
246 | |
247 | lum.u.context.ctx = ctx->ctx; | |
248 | switch (ctx->ctx) { | |
249 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
250 | lum.u.context.u.perf_counter = ctx->u.perf_counter; | |
251 | break; | |
252 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
253 | { | |
254 | size_t provider_name_len = strlen( | |
255 | ctx->u.app_ctx.provider_name) + 1; | |
256 | size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1; | |
257 | ||
258 | lum.u.context.u.app_ctx.provider_name_len = provider_name_len; | |
259 | lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len; | |
260 | ||
261 | len = provider_name_len + ctx_name_len; | |
262 | buf = zmalloc(len); | |
263 | if (!buf) { | |
264 | ret = -ENOMEM; | |
265 | goto end; | |
266 | } | |
267 | memcpy(buf, ctx->u.app_ctx.provider_name, | |
268 | provider_name_len); | |
269 | memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name, | |
270 | ctx_name_len); | |
271 | break; | |
272 | } | |
273 | default: | |
274 | break; | |
275 | } | |
276 | ret = ustcomm_send_app_msg(sock, &lum); | |
277 | if (ret) | |
278 | goto end; | |
279 | if (buf) { | |
280 | /* send var len ctx_name */ | |
281 | ret = ustcomm_send_unix_sock(sock, buf, len); | |
282 | if (ret < 0) { | |
283 | goto end; | |
284 | } | |
285 | if (ret != len) { | |
286 | ret = -EINVAL; | |
287 | goto end; | |
288 | } | |
289 | } | |
290 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
291 | if (ret < 0) { | |
292 | goto end; | |
57773204 | 293 | } |
32ce8569 MD |
294 | context_data->handle = -1; |
295 | DBG("Context created successfully"); | |
57773204 | 296 | *_context_data = context_data; |
53f0df51 JG |
297 | context_data = NULL; |
298 | end: | |
299 | free(context_data); | |
300 | free(buf); | |
57773204 MD |
301 | return ret; |
302 | } | |
303 | ||
cd54f6d9 MD |
304 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
305 | struct lttng_ust_object_data *obj_data) | |
306 | { | |
307 | struct ustcomm_ust_msg lum; | |
308 | struct ustcomm_ust_reply lur; | |
309 | int ret; | |
310 | ||
311 | if (!obj_data) | |
312 | return -EINVAL; | |
313 | ||
314 | memset(&lum, 0, sizeof(lum)); | |
315 | lum.handle = obj_data->handle; | |
316 | lum.cmd = LTTNG_UST_FILTER; | |
317 | lum.u.filter.data_size = bytecode->len; | |
318 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 319 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
320 | |
321 | ret = ustcomm_send_app_msg(sock, &lum); | |
322 | if (ret) | |
323 | return ret; | |
cd54f6d9 MD |
324 | /* send var len bytecode */ |
325 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
326 | bytecode->len); | |
327 | if (ret < 0) { | |
328 | return ret; | |
329 | } | |
7bc53e94 MD |
330 | if (ret != bytecode->len) |
331 | return -EINVAL; | |
332 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
333 | } |
334 | ||
da57c034 JI |
335 | int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion, |
336 | struct lttng_ust_object_data *obj_data) | |
337 | { | |
338 | struct ustcomm_ust_msg lum; | |
339 | struct ustcomm_ust_reply lur; | |
340 | int ret; | |
341 | ||
342 | if (!obj_data) { | |
343 | return -EINVAL; | |
344 | } | |
345 | ||
346 | memset(&lum, 0, sizeof(lum)); | |
347 | lum.handle = obj_data->handle; | |
348 | lum.cmd = LTTNG_UST_EXCLUSION; | |
349 | lum.u.exclusion.count = exclusion->count; | |
350 | ||
351 | ret = ustcomm_send_app_msg(sock, &lum); | |
352 | if (ret) { | |
353 | return ret; | |
354 | } | |
355 | ||
1628366f | 356 | /* send var len exclusion names */ |
da57c034 JI |
357 | ret = ustcomm_send_unix_sock(sock, |
358 | exclusion->names, | |
359 | exclusion->count * LTTNG_UST_SYM_NAME_LEN); | |
360 | if (ret < 0) { | |
361 | return ret; | |
362 | } | |
363 | if (ret != exclusion->count * LTTNG_UST_SYM_NAME_LEN) { | |
364 | return -EINVAL; | |
365 | } | |
366 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
367 | } | |
368 | ||
57773204 | 369 | /* Enable event, channel and session ioctl */ |
61f02aea | 370 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
371 | { |
372 | struct ustcomm_ust_msg lum; | |
373 | struct ustcomm_ust_reply lur; | |
374 | int ret; | |
375 | ||
9bfc503d MD |
376 | if (!object) |
377 | return -EINVAL; | |
378 | ||
57773204 MD |
379 | memset(&lum, 0, sizeof(lum)); |
380 | lum.handle = object->handle; | |
381 | lum.cmd = LTTNG_UST_ENABLE; | |
382 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
383 | if (ret) | |
384 | return ret; | |
385 | DBG("enabled handle %u", object->handle); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | /* Disable event, channel and session ioctl */ | |
61f02aea | 390 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
391 | { |
392 | struct ustcomm_ust_msg lum; | |
393 | struct ustcomm_ust_reply lur; | |
394 | int ret; | |
395 | ||
9bfc503d MD |
396 | if (!object) |
397 | return -EINVAL; | |
398 | ||
57773204 MD |
399 | memset(&lum, 0, sizeof(lum)); |
400 | lum.handle = object->handle; | |
401 | lum.cmd = LTTNG_UST_DISABLE; | |
402 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
403 | if (ret) | |
404 | return ret; | |
405 | DBG("disable handle %u", object->handle); | |
406 | return 0; | |
407 | } | |
408 | ||
4a6ca058 | 409 | int ustctl_start_session(int sock, int handle) |
57773204 | 410 | { |
61f02aea | 411 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
412 | |
413 | obj.handle = handle; | |
414 | return ustctl_enable(sock, &obj); | |
57773204 MD |
415 | } |
416 | ||
4a6ca058 | 417 | int ustctl_stop_session(int sock, int handle) |
57773204 | 418 | { |
61f02aea | 419 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
420 | |
421 | obj.handle = handle; | |
422 | return ustctl_disable(sock, &obj); | |
57773204 MD |
423 | } |
424 | ||
57773204 MD |
425 | int ustctl_tracepoint_list(int sock) |
426 | { | |
b115631f MD |
427 | struct ustcomm_ust_msg lum; |
428 | struct ustcomm_ust_reply lur; | |
429 | int ret, tp_list_handle; | |
430 | ||
431 | memset(&lum, 0, sizeof(lum)); | |
432 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
433 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
434 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
435 | if (ret) | |
436 | return ret; | |
437 | tp_list_handle = lur.ret_val; | |
438 | DBG("received tracepoint list handle %u", tp_list_handle); | |
439 | return tp_list_handle; | |
440 | } | |
441 | ||
442 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 443 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
444 | { |
445 | struct ustcomm_ust_msg lum; | |
446 | struct ustcomm_ust_reply lur; | |
447 | int ret; | |
448 | ||
9bfc503d MD |
449 | if (!iter) |
450 | return -EINVAL; | |
451 | ||
b115631f MD |
452 | memset(&lum, 0, sizeof(lum)); |
453 | lum.handle = tp_list_handle; | |
454 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
455 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
456 | if (ret) | |
457 | return ret; | |
882a56d7 | 458 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 459 | lur.u.tracepoint.name, |
882a56d7 | 460 | lur.u.tracepoint.loglevel); |
cbef6901 | 461 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 462 | return 0; |
57773204 MD |
463 | } |
464 | ||
40003310 MD |
465 | int ustctl_tracepoint_field_list(int sock) |
466 | { | |
467 | struct ustcomm_ust_msg lum; | |
468 | struct ustcomm_ust_reply lur; | |
469 | int ret, tp_field_list_handle; | |
470 | ||
471 | memset(&lum, 0, sizeof(lum)); | |
472 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
473 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
474 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
475 | if (ret) | |
476 | return ret; | |
477 | tp_field_list_handle = lur.ret_val; | |
478 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
479 | return tp_field_list_handle; | |
480 | } | |
481 | ||
482 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
483 | struct lttng_ust_field_iter *iter) | |
484 | { | |
485 | struct ustcomm_ust_msg lum; | |
486 | struct ustcomm_ust_reply lur; | |
487 | int ret; | |
488 | ssize_t len; | |
489 | ||
490 | if (!iter) | |
491 | return -EINVAL; | |
492 | ||
493 | memset(&lum, 0, sizeof(lum)); | |
494 | lum.handle = tp_field_list_handle; | |
495 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
496 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
497 | if (ret) | |
498 | return ret; | |
499 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
500 | if (len != sizeof(*iter)) { | |
501 | return -EINVAL; | |
502 | } | |
503 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
504 | iter->event_name, | |
505 | iter->loglevel, | |
506 | iter->field_name, | |
507 | iter->type); | |
508 | return 0; | |
509 | } | |
510 | ||
57773204 MD |
511 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
512 | { | |
513 | struct ustcomm_ust_msg lum; | |
514 | struct ustcomm_ust_reply lur; | |
515 | int ret; | |
516 | ||
9bfc503d MD |
517 | if (!v) |
518 | return -EINVAL; | |
519 | ||
57773204 MD |
520 | memset(&lum, 0, sizeof(lum)); |
521 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
522 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
523 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
524 | if (ret) | |
525 | return ret; | |
526 | memcpy(v, &lur.u.version, sizeof(*v)); | |
527 | DBG("received tracer version"); | |
528 | return 0; | |
529 | } | |
530 | ||
531 | int ustctl_wait_quiescent(int sock) | |
532 | { | |
533 | struct ustcomm_ust_msg lum; | |
534 | struct ustcomm_ust_reply lur; | |
535 | int ret; | |
536 | ||
537 | memset(&lum, 0, sizeof(lum)); | |
538 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
539 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
540 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
541 | if (ret) | |
542 | return ret; | |
543 | DBG("waited for quiescent state"); | |
544 | return 0; | |
545 | } | |
546 | ||
547 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
548 | { | |
9bfc503d MD |
549 | if (!calibrate) |
550 | return -EINVAL; | |
551 | ||
57773204 MD |
552 | return -ENOSYS; |
553 | } | |
554 | ||
f1fffc57 MD |
555 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
556 | { | |
557 | struct ustcomm_ust_msg lum; | |
558 | struct ustcomm_ust_reply lur; | |
559 | int ret; | |
560 | ||
9bfc503d MD |
561 | if (!object) |
562 | return -EINVAL; | |
563 | ||
f1fffc57 MD |
564 | memset(&lum, 0, sizeof(lum)); |
565 | lum.handle = object->handle; | |
566 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
567 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
568 | if (ret) | |
569 | return ret; | |
570 | DBG("flushed buffer handle %u", object->handle); | |
571 | return 0; | |
572 | } | |
573 | ||
74d81a6c MD |
574 | static |
575 | int ustctl_send_channel(int sock, | |
576 | enum lttng_ust_chan_type type, | |
577 | void *data, | |
578 | uint64_t size, | |
ff0f5728 | 579 | int wakeup_fd, |
74d81a6c MD |
580 | int send_fd_only) |
581 | { | |
582 | ssize_t len; | |
583 | ||
584 | if (!send_fd_only) { | |
585 | /* Send mmap size */ | |
586 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
587 | if (len != sizeof(size)) { | |
588 | if (len < 0) | |
589 | return len; | |
590 | else | |
591 | return -EIO; | |
592 | } | |
593 | ||
594 | /* Send channel type */ | |
595 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
596 | if (len != sizeof(type)) { | |
597 | if (len < 0) | |
598 | return len; | |
599 | else | |
600 | return -EIO; | |
601 | } | |
602 | } | |
603 | ||
604 | /* Send channel data */ | |
605 | len = ustcomm_send_unix_sock(sock, data, size); | |
606 | if (len != size) { | |
607 | if (len < 0) | |
608 | return len; | |
609 | else | |
610 | return -EIO; | |
611 | } | |
57773204 | 612 | |
ff0f5728 MD |
613 | /* Send wakeup fd */ |
614 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
615 | if (len <= 0) { | |
616 | if (len < 0) | |
617 | return len; | |
618 | else | |
619 | return -EIO; | |
620 | } | |
74d81a6c MD |
621 | return 0; |
622 | } | |
623 | ||
624 | static | |
625 | int ustctl_send_stream(int sock, | |
626 | uint32_t stream_nr, | |
627 | uint64_t memory_map_size, | |
628 | int shm_fd, int wakeup_fd, | |
629 | int send_fd_only) | |
57773204 | 630 | { |
74d81a6c MD |
631 | ssize_t len; |
632 | int fds[2]; | |
633 | ||
634 | if (!send_fd_only) { | |
635 | if (shm_fd < 0) { | |
636 | /* finish iteration */ | |
637 | uint64_t v = -1; | |
638 | ||
639 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
640 | if (len != sizeof(v)) { | |
641 | if (len < 0) | |
642 | return len; | |
643 | else | |
644 | return -EIO; | |
645 | } | |
646 | return 0; | |
647 | } | |
648 | ||
649 | /* Send mmap size */ | |
650 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
651 | sizeof(memory_map_size)); | |
652 | if (len != sizeof(memory_map_size)) { | |
653 | if (len < 0) | |
654 | return len; | |
655 | else | |
656 | return -EIO; | |
657 | } | |
658 | ||
659 | /* Send stream nr */ | |
660 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
661 | sizeof(stream_nr)); | |
662 | if (len != sizeof(stream_nr)) { | |
663 | if (len < 0) | |
664 | return len; | |
665 | else | |
666 | return -EIO; | |
667 | } | |
668 | } | |
669 | ||
670 | /* Send shm fd and wakeup fd */ | |
671 | fds[0] = shm_fd; | |
672 | fds[1] = wakeup_fd; | |
673 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
674 | if (len <= 0) { | |
675 | if (len < 0) | |
676 | return len; | |
677 | else | |
678 | return -EIO; | |
679 | } | |
680 | return 0; | |
681 | } | |
682 | ||
683 | int ustctl_recv_channel_from_consumer(int sock, | |
684 | struct lttng_ust_object_data **_channel_data) | |
685 | { | |
686 | struct lttng_ust_object_data *channel_data; | |
687 | ssize_t len; | |
ff0f5728 | 688 | int wakeup_fd; |
7a784989 | 689 | int ret; |
57773204 | 690 | |
74d81a6c MD |
691 | channel_data = zmalloc(sizeof(*channel_data)); |
692 | if (!channel_data) { | |
693 | ret = -ENOMEM; | |
694 | goto error_alloc; | |
695 | } | |
696 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
12f3dabc | 697 | channel_data->handle = -1; |
74d81a6c MD |
698 | |
699 | /* recv mmap size */ | |
700 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
701 | sizeof(channel_data->size)); | |
702 | if (len != sizeof(channel_data->size)) { | |
703 | if (len < 0) | |
704 | ret = len; | |
705 | else | |
706 | ret = -EINVAL; | |
707 | goto error; | |
708 | } | |
9bfc503d | 709 | |
74d81a6c MD |
710 | /* recv channel type */ |
711 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
712 | sizeof(channel_data->u.channel.type)); | |
713 | if (len != sizeof(channel_data->u.channel.type)) { | |
714 | if (len < 0) | |
715 | ret = len; | |
716 | else | |
717 | ret = -EINVAL; | |
718 | goto error; | |
719 | } | |
720 | ||
721 | /* recv channel data */ | |
722 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
723 | if (!channel_data->u.channel.data) { | |
724 | ret = -ENOMEM; | |
725 | goto error; | |
726 | } | |
727 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
728 | channel_data->size); | |
729 | if (len != channel_data->size) { | |
730 | if (len < 0) | |
731 | ret = len; | |
732 | else | |
733 | ret = -EINVAL; | |
734 | goto error_recv_data; | |
735 | } | |
ff0f5728 MD |
736 | /* recv wakeup fd */ |
737 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
738 | if (len <= 0) { | |
739 | if (len < 0) { | |
740 | ret = len; | |
741 | goto error_recv_data; | |
742 | } else { | |
743 | ret = -EIO; | |
744 | goto error_recv_data; | |
745 | } | |
746 | } | |
747 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
748 | *_channel_data = channel_data; |
749 | return 0; | |
750 | ||
751 | error_recv_data: | |
752 | free(channel_data->u.channel.data); | |
753 | error: | |
754 | free(channel_data); | |
755 | error_alloc: | |
756 | return ret; | |
757 | } | |
758 | ||
759 | int ustctl_recv_stream_from_consumer(int sock, | |
760 | struct lttng_ust_object_data **_stream_data) | |
761 | { | |
762 | struct lttng_ust_object_data *stream_data; | |
763 | ssize_t len; | |
764 | int ret; | |
765 | int fds[2]; | |
766 | ||
767 | stream_data = zmalloc(sizeof(*stream_data)); | |
768 | if (!stream_data) { | |
769 | ret = -ENOMEM; | |
770 | goto error_alloc; | |
57773204 | 771 | } |
74d81a6c MD |
772 | |
773 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
774 | stream_data->handle = -1; | |
775 | ||
776 | /* recv mmap size */ | |
777 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
778 | sizeof(stream_data->size)); | |
779 | if (len != sizeof(stream_data->size)) { | |
780 | if (len < 0) | |
781 | ret = len; | |
782 | else | |
783 | ret = -EINVAL; | |
784 | goto error; | |
785 | } | |
786 | if (stream_data->size == -1) { | |
787 | ret = -LTTNG_UST_ERR_NOENT; | |
788 | goto error; | |
789 | } | |
790 | ||
791 | /* recv stream nr */ | |
792 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
793 | sizeof(stream_data->u.stream.stream_nr)); | |
794 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
795 | if (len < 0) | |
796 | ret = len; | |
797 | else | |
798 | ret = -EINVAL; | |
799 | goto error; | |
800 | } | |
801 | ||
802 | /* recv shm fd and wakeup fd */ | |
803 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
804 | if (len <= 0) { | |
805 | if (len < 0) { | |
806 | ret = len; | |
807 | goto error; | |
808 | } else { | |
809 | ret = -EIO; | |
810 | goto error; | |
0bfe09ec | 811 | } |
0bfe09ec | 812 | } |
74d81a6c MD |
813 | stream_data->u.stream.shm_fd = fds[0]; |
814 | stream_data->u.stream.wakeup_fd = fds[1]; | |
815 | *_stream_data = stream_data; | |
816 | return 0; | |
0bfe09ec | 817 | |
74d81a6c MD |
818 | error: |
819 | free(stream_data); | |
820 | error_alloc: | |
821 | return ret; | |
822 | } | |
823 | ||
824 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
825 | struct lttng_ust_object_data *channel_data) | |
826 | { | |
827 | struct ustcomm_ust_msg lum; | |
828 | struct ustcomm_ust_reply lur; | |
829 | int ret; | |
830 | ||
831 | if (!channel_data) | |
832 | return -EINVAL; | |
833 | ||
834 | memset(&lum, 0, sizeof(lum)); | |
835 | lum.handle = session_handle; | |
836 | lum.cmd = LTTNG_UST_CHANNEL; | |
837 | lum.u.channel.len = channel_data->size; | |
838 | lum.u.channel.type = channel_data->u.channel.type; | |
839 | ret = ustcomm_send_app_msg(sock, &lum); | |
840 | if (ret) | |
841 | return ret; | |
842 | ||
843 | ret = ustctl_send_channel(sock, | |
844 | channel_data->u.channel.type, | |
845 | channel_data->u.channel.data, | |
846 | channel_data->size, | |
ff0f5728 | 847 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
848 | 1); |
849 | if (ret) | |
850 | return ret; | |
851 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
852 | if (!ret) { | |
7f2348b8 | 853 | channel_data->handle = lur.ret_val; |
57773204 | 854 | } |
74d81a6c MD |
855 | return ret; |
856 | } | |
857 | ||
858 | int ustctl_send_stream_to_ust(int sock, | |
859 | struct lttng_ust_object_data *channel_data, | |
860 | struct lttng_ust_object_data *stream_data) | |
861 | { | |
862 | struct ustcomm_ust_msg lum; | |
863 | struct ustcomm_ust_reply lur; | |
864 | int ret; | |
865 | ||
866 | memset(&lum, 0, sizeof(lum)); | |
867 | lum.handle = channel_data->handle; | |
868 | lum.cmd = LTTNG_UST_STREAM; | |
869 | lum.u.stream.len = stream_data->size; | |
870 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
871 | ret = ustcomm_send_app_msg(sock, &lum); | |
872 | if (ret) | |
873 | return ret; | |
874 | ||
875 | assert(stream_data); | |
876 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
877 | ||
878 | ret = ustctl_send_stream(sock, | |
879 | stream_data->u.stream.stream_nr, | |
880 | stream_data->size, | |
881 | stream_data->u.stream.shm_fd, | |
882 | stream_data->u.stream.wakeup_fd, 1); | |
883 | if (ret) | |
884 | return ret; | |
885 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
886 | } | |
887 | ||
12f3dabc MD |
888 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, |
889 | struct lttng_ust_object_data *src) | |
890 | { | |
891 | struct lttng_ust_object_data *obj; | |
892 | int ret; | |
893 | ||
894 | if (src->handle != -1) { | |
895 | ret = -EINVAL; | |
896 | goto error; | |
897 | } | |
898 | ||
899 | obj = zmalloc(sizeof(*obj)); | |
900 | if (!obj) { | |
901 | ret = -ENOMEM; | |
902 | goto error; | |
903 | } | |
904 | ||
905 | obj->type = src->type; | |
906 | obj->handle = src->handle; | |
907 | obj->size = src->size; | |
908 | ||
909 | switch (obj->type) { | |
910 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
911 | { | |
912 | obj->u.channel.type = src->u.channel.type; | |
913 | if (src->u.channel.wakeup_fd >= 0) { | |
914 | obj->u.channel.wakeup_fd = | |
915 | dup(src->u.channel.wakeup_fd); | |
916 | if (obj->u.channel.wakeup_fd < 0) { | |
917 | ret = errno; | |
918 | goto chan_error_wakeup_fd; | |
919 | } | |
920 | } else { | |
921 | obj->u.channel.wakeup_fd = | |
922 | src->u.channel.wakeup_fd; | |
923 | } | |
924 | obj->u.channel.data = zmalloc(obj->size); | |
925 | if (!obj->u.channel.data) { | |
926 | ret = -ENOMEM; | |
927 | goto chan_error_alloc; | |
928 | } | |
929 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
930 | break; | |
931 | ||
932 | chan_error_alloc: | |
933 | if (src->u.channel.wakeup_fd >= 0) { | |
934 | int closeret; | |
935 | ||
936 | closeret = close(obj->u.channel.wakeup_fd); | |
937 | if (closeret) { | |
938 | PERROR("close"); | |
939 | } | |
940 | } | |
941 | chan_error_wakeup_fd: | |
942 | goto error_type; | |
943 | ||
944 | } | |
945 | ||
946 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
947 | { | |
948 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
949 | if (src->u.stream.wakeup_fd >= 0) { | |
950 | obj->u.stream.wakeup_fd = | |
951 | dup(src->u.stream.wakeup_fd); | |
952 | if (obj->u.stream.wakeup_fd < 0) { | |
953 | ret = errno; | |
954 | goto stream_error_wakeup_fd; | |
955 | } | |
956 | } else { | |
957 | obj->u.stream.wakeup_fd = | |
958 | src->u.stream.wakeup_fd; | |
959 | } | |
960 | ||
961 | if (src->u.stream.shm_fd >= 0) { | |
962 | obj->u.stream.shm_fd = | |
963 | dup(src->u.stream.shm_fd); | |
964 | if (obj->u.stream.shm_fd < 0) { | |
965 | ret = errno; | |
966 | goto stream_error_shm_fd; | |
967 | } | |
968 | } else { | |
969 | obj->u.stream.shm_fd = | |
970 | src->u.stream.shm_fd; | |
971 | } | |
972 | break; | |
973 | ||
974 | stream_error_shm_fd: | |
975 | if (src->u.stream.wakeup_fd >= 0) { | |
976 | int closeret; | |
977 | ||
978 | closeret = close(obj->u.stream.wakeup_fd); | |
979 | if (closeret) { | |
980 | PERROR("close"); | |
981 | } | |
982 | } | |
983 | stream_error_wakeup_fd: | |
984 | goto error_type; | |
985 | } | |
986 | ||
987 | default: | |
988 | ret = -EINVAL; | |
989 | goto error_type; | |
990 | } | |
991 | ||
992 | *dest = obj; | |
993 | return 0; | |
994 | ||
995 | error_type: | |
996 | free(obj); | |
997 | error: | |
998 | return ret; | |
999 | } | |
1000 | ||
74d81a6c MD |
1001 | |
1002 | /* Buffer operations */ | |
1003 | ||
5ea386c3 MD |
1004 | int ustctl_get_nr_stream_per_channel(void) |
1005 | { | |
1006 | return num_possible_cpus(); | |
1007 | } | |
1008 | ||
74d81a6c | 1009 | struct ustctl_consumer_channel * |
5ea386c3 MD |
1010 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr, |
1011 | const int *stream_fds, int nr_stream_fds) | |
74d81a6c MD |
1012 | { |
1013 | struct ustctl_consumer_channel *chan; | |
1014 | const char *transport_name; | |
1015 | struct lttng_transport *transport; | |
1016 | ||
1017 | switch (attr->type) { | |
1018 | case LTTNG_UST_CHAN_PER_CPU: | |
1019 | if (attr->output == LTTNG_UST_MMAP) { | |
34a91bdb MD |
1020 | if (attr->overwrite) { |
1021 | if (attr->read_timer_interval == 0) { | |
1022 | transport_name = "relay-overwrite-mmap"; | |
1023 | } else { | |
1024 | transport_name = "relay-overwrite-rt-mmap"; | |
1025 | } | |
1026 | } else { | |
1027 | if (attr->read_timer_interval == 0) { | |
1028 | transport_name = "relay-discard-mmap"; | |
1029 | } else { | |
1030 | transport_name = "relay-discard-rt-mmap"; | |
1031 | } | |
1032 | } | |
74d81a6c MD |
1033 | } else { |
1034 | return NULL; | |
1035 | } | |
c1fca457 | 1036 | break; |
74d81a6c MD |
1037 | case LTTNG_UST_CHAN_METADATA: |
1038 | if (attr->output == LTTNG_UST_MMAP) | |
1039 | transport_name = "relay-metadata-mmap"; | |
1040 | else | |
1041 | return NULL; | |
c1fca457 MD |
1042 | break; |
1043 | default: | |
74d81a6c | 1044 | transport_name = "<unknown>"; |
c1fca457 MD |
1045 | return NULL; |
1046 | } | |
74d81a6c MD |
1047 | |
1048 | transport = lttng_transport_find(transport_name); | |
1049 | if (!transport) { | |
1050 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 1051 | transport_name); |
74d81a6c | 1052 | return NULL; |
7a784989 | 1053 | } |
74d81a6c MD |
1054 | |
1055 | chan = zmalloc(sizeof(*chan)); | |
1056 | if (!chan) | |
1057 | return NULL; | |
1058 | ||
1059 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 1060 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 1061 | attr->switch_timer_interval, |
32ce8569 | 1062 | attr->read_timer_interval, |
a9ff648c | 1063 | attr->uuid, attr->chan_id, |
b2c5f61a MD |
1064 | stream_fds, nr_stream_fds, |
1065 | attr->blocking_timeout); | |
74d81a6c MD |
1066 | if (!chan->chan) { |
1067 | goto chan_error; | |
1068 | } | |
1069 | chan->chan->ops = &transport->ops; | |
1070 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
cb7378b3 MD |
1071 | chan->wait_fd = ustctl_channel_get_wait_fd(chan); |
1072 | chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
1073 | return chan; |
1074 | ||
1075 | chan_error: | |
1076 | free(chan); | |
1077 | return NULL; | |
57773204 MD |
1078 | } |
1079 | ||
74d81a6c | 1080 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 1081 | { |
b24e4e91 MD |
1082 | (void) ustctl_channel_close_wait_fd(chan); |
1083 | (void) ustctl_channel_close_wakeup_fd(chan); | |
74d81a6c MD |
1084 | chan->chan->ops->channel_destroy(chan->chan); |
1085 | free(chan); | |
1086 | } | |
1087 | ||
1088 | int ustctl_send_channel_to_sessiond(int sock, | |
1089 | struct ustctl_consumer_channel *channel) | |
1090 | { | |
1091 | struct shm_object_table *table; | |
57773204 | 1092 | |
74d81a6c MD |
1093 | table = channel->chan->handle->table; |
1094 | if (table->size <= 0) | |
9bfc503d | 1095 | return -EINVAL; |
74d81a6c MD |
1096 | return ustctl_send_channel(sock, |
1097 | channel->attr.type, | |
1098 | table->objects[0].memory_map, | |
1099 | table->objects[0].memory_map_size, | |
ff0f5728 | 1100 | channel->wakeup_fd, |
74d81a6c MD |
1101 | 0); |
1102 | } | |
9bfc503d | 1103 | |
74d81a6c MD |
1104 | int ustctl_send_stream_to_sessiond(int sock, |
1105 | struct ustctl_consumer_stream *stream) | |
1106 | { | |
1107 | if (!stream) | |
1108 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
1109 | ||
1110 | return ustctl_send_stream(sock, | |
1111 | stream->cpu, | |
1112 | stream->memory_map_size, | |
1113 | stream->shm_fd, stream->wakeup_fd, | |
1114 | 0); | |
57773204 MD |
1115 | } |
1116 | ||
c9023c93 MD |
1117 | int ustctl_write_metadata_to_channel( |
1118 | struct ustctl_consumer_channel *channel, | |
1119 | const char *metadata_str, /* NOT null-terminated */ | |
1120 | size_t len) /* metadata length */ | |
1121 | { | |
1122 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1123 | struct lttng_channel *chan = channel->chan; | |
1124 | const char *str = metadata_str; | |
1125 | int ret = 0, waitret; | |
1126 | size_t reserve_len, pos; | |
1127 | ||
1128 | for (pos = 0; pos < len; pos += reserve_len) { | |
1129 | reserve_len = min_t(size_t, | |
1130 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1131 | len - pos); | |
1132 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1133 | sizeof(char), -1, chan->handle, NULL); |
c9023c93 MD |
1134 | /* |
1135 | * We don't care about metadata buffer's records lost | |
1136 | * count, because we always retry here. Report error if | |
1137 | * we need to bail out after timeout or being | |
1138 | * interrupted. | |
1139 | */ | |
1140 | waitret = wait_cond_interruptible_timeout( | |
1141 | ({ | |
1142 | ret = chan->ops->event_reserve(&ctx, 0); | |
1143 | ret != -ENOBUFS || !ret; | |
1144 | }), | |
1145 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1146 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1147 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1148 | waitret == -EINTR ? "interrupted" : | |
1149 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1150 | if (waitret == -EINTR) | |
1151 | ret = waitret; | |
1152 | goto end; | |
1153 | } | |
1154 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
1155 | chan->ops->event_commit(&ctx); | |
1156 | } | |
1157 | end: | |
1158 | return ret; | |
1159 | } | |
1160 | ||
3ef94b0e JD |
1161 | /* |
1162 | * Write at most one packet in the channel. | |
1163 | * Returns the number of bytes written on success, < 0 on error. | |
1164 | */ | |
1165 | ssize_t ustctl_write_one_packet_to_channel( | |
1166 | struct ustctl_consumer_channel *channel, | |
1167 | const char *metadata_str, /* NOT null-terminated */ | |
1168 | size_t len) /* metadata length */ | |
1169 | { | |
1170 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1171 | struct lttng_channel *chan = channel->chan; | |
1172 | const char *str = metadata_str; | |
1173 | ssize_t reserve_len; | |
1174 | int ret; | |
1175 | ||
1176 | reserve_len = min_t(ssize_t, | |
1177 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1178 | len); | |
1179 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1180 | sizeof(char), -1, chan->handle, NULL); |
3ef94b0e JD |
1181 | ret = chan->ops->event_reserve(&ctx, 0); |
1182 | if (ret != 0) { | |
1183 | DBG("LTTng: event reservation failed"); | |
1184 | assert(ret < 0); | |
1185 | reserve_len = ret; | |
1186 | goto end; | |
1187 | } | |
1188 | chan->ops->event_write(&ctx, str, reserve_len); | |
1189 | chan->ops->event_commit(&ctx); | |
1190 | ||
1191 | end: | |
1192 | return reserve_len; | |
1193 | } | |
1194 | ||
ff0f5728 MD |
1195 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan) |
1196 | { | |
1197 | struct channel *chan; | |
cb7378b3 | 1198 | int ret; |
ff0f5728 MD |
1199 | |
1200 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1201 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
ff0f5728 | 1202 | chan, chan->handle); |
cb7378b3 MD |
1203 | if (!ret) |
1204 | consumer_chan->wait_fd = -1; | |
1205 | return ret; | |
ff0f5728 MD |
1206 | } |
1207 | ||
1208 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan) | |
1209 | { | |
1210 | struct channel *chan; | |
cb7378b3 | 1211 | int ret; |
ff0f5728 MD |
1212 | |
1213 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1214 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1215 | chan, chan->handle); |
cb7378b3 MD |
1216 | if (!ret) |
1217 | consumer_chan->wakeup_fd = -1; | |
1218 | return ret; | |
ff0f5728 MD |
1219 | } |
1220 | ||
74d81a6c | 1221 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
1222 | { |
1223 | struct channel *chan; | |
1224 | ||
74d81a6c | 1225 | chan = stream->chan->chan->chan; |
ff0f5728 | 1226 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
74d81a6c | 1227 | chan, stream->handle, stream->cpu); |
5224b5c8 MD |
1228 | } |
1229 | ||
74d81a6c | 1230 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 1231 | { |
66bdd22a | 1232 | struct channel *chan; |
74d81a6c MD |
1233 | |
1234 | chan = stream->chan->chan->chan; | |
ff0f5728 | 1235 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
74d81a6c MD |
1236 | chan, stream->handle, stream->cpu); |
1237 | } | |
1238 | ||
1239 | struct ustctl_consumer_stream * | |
1240 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
1241 | int cpu) | |
1242 | { | |
1243 | struct ustctl_consumer_stream *stream; | |
1244 | struct lttng_ust_shm_handle *handle; | |
1245 | struct channel *chan; | |
1246 | int shm_fd, wait_fd, wakeup_fd; | |
1247 | uint64_t memory_map_size; | |
4cfec15c | 1248 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
1249 | int ret; |
1250 | ||
74d81a6c MD |
1251 | if (!channel) |
1252 | return NULL; | |
1253 | handle = channel->chan->handle; | |
9bfc503d MD |
1254 | if (!handle) |
1255 | return NULL; | |
1256 | ||
74d81a6c | 1257 | chan = channel->chan->chan; |
6e922b24 | 1258 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
1259 | chan, cpu, handle, &shm_fd, &wait_fd, |
1260 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
1261 | if (!buf) |
1262 | return NULL; | |
74d81a6c | 1263 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1264 | if (ret) |
1265 | return NULL; | |
74d81a6c MD |
1266 | |
1267 | stream = zmalloc(sizeof(*stream)); | |
1268 | if (!stream) | |
1269 | goto alloc_error; | |
1270 | stream->handle = handle; | |
1271 | stream->buf = buf; | |
1272 | stream->chan = channel; | |
1273 | stream->shm_fd = shm_fd; | |
1274 | stream->wait_fd = wait_fd; | |
1275 | stream->wakeup_fd = wakeup_fd; | |
1276 | stream->memory_map_size = memory_map_size; | |
1277 | stream->cpu = cpu; | |
1278 | return stream; | |
1279 | ||
1280 | alloc_error: | |
1281 | return NULL; | |
1282 | } | |
1283 | ||
1284 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
1285 | { | |
1286 | struct lttng_ust_lib_ring_buffer *buf; | |
1287 | struct ustctl_consumer_channel *consumer_chan; | |
1288 | ||
1289 | assert(stream); | |
1290 | buf = stream->buf; | |
1291 | consumer_chan = stream->chan; | |
b24e4e91 MD |
1292 | (void) ustctl_stream_close_wait_fd(stream); |
1293 | (void) ustctl_stream_close_wakeup_fd(stream); | |
74d81a6c MD |
1294 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); |
1295 | free(stream); | |
6e922b24 MD |
1296 | } |
1297 | ||
ff0f5728 MD |
1298 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan) |
1299 | { | |
1300 | if (!chan) | |
1301 | return -EINVAL; | |
1302 | return shm_get_wait_fd(chan->chan->handle, | |
1303 | &chan->chan->handle->chan._ref); | |
1304 | } | |
1305 | ||
1306 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan) | |
1307 | { | |
1308 | if (!chan) | |
1309 | return -EINVAL; | |
1310 | return shm_get_wakeup_fd(chan->chan->handle, | |
1311 | &chan->chan->handle->chan._ref); | |
1312 | } | |
1313 | ||
1314 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream) | |
6e922b24 | 1315 | { |
74d81a6c MD |
1316 | struct lttng_ust_lib_ring_buffer *buf; |
1317 | struct ustctl_consumer_channel *consumer_chan; | |
1318 | ||
1319 | if (!stream) | |
1320 | return -EINVAL; | |
1321 | buf = stream->buf; | |
1322 | consumer_chan = stream->chan; | |
1323 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
1324 | } | |
1325 | ||
ff0f5728 | 1326 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
74d81a6c MD |
1327 | { |
1328 | struct lttng_ust_lib_ring_buffer *buf; | |
1329 | struct ustctl_consumer_channel *consumer_chan; | |
1330 | ||
1331 | if (!stream) | |
1332 | return -EINVAL; | |
1333 | buf = stream->buf; | |
1334 | consumer_chan = stream->chan; | |
1335 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
1336 | } |
1337 | ||
57773204 MD |
1338 | /* For mmap mode, readable without "get" operation */ |
1339 | ||
74d81a6c | 1340 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 1341 | { |
74d81a6c MD |
1342 | struct lttng_ust_lib_ring_buffer *buf; |
1343 | struct ustctl_consumer_channel *consumer_chan; | |
1344 | ||
1345 | if (!stream) | |
9bfc503d | 1346 | return NULL; |
74d81a6c MD |
1347 | buf = stream->buf; |
1348 | consumer_chan = stream->chan; | |
1349 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1350 | } |
1351 | ||
57773204 | 1352 | /* returns the length to mmap. */ |
74d81a6c | 1353 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1354 | unsigned long *len) |
1355 | { | |
74d81a6c | 1356 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1357 | unsigned long mmap_buf_len; |
66bdd22a | 1358 | struct channel *chan; |
57773204 | 1359 | |
74d81a6c | 1360 | if (!stream) |
9bfc503d | 1361 | return -EINVAL; |
74d81a6c MD |
1362 | consumer_chan = stream->chan; |
1363 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1364 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1365 | return -EINVAL; | |
1366 | mmap_buf_len = chan->backend.buf_size; | |
1367 | if (chan->backend.extra_reader_sb) | |
1368 | mmap_buf_len += chan->backend.subbuf_size; | |
1369 | if (mmap_buf_len > INT_MAX) | |
1370 | return -EFBIG; | |
1371 | *len = mmap_buf_len; | |
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1376 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1377 | unsigned long *len) |
1378 | { | |
74d81a6c | 1379 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1380 | struct channel *chan; |
57773204 | 1381 | |
74d81a6c | 1382 | if (!stream) |
9bfc503d | 1383 | return -EINVAL; |
74d81a6c MD |
1384 | consumer_chan = stream->chan; |
1385 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1386 | *len = chan->backend.subbuf_size; |
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * For mmap mode, operate on the current packet (between get/put or | |
1392 | * get_next/put_next). | |
1393 | */ | |
1394 | ||
1395 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1396 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1397 | unsigned long *off) | |
57773204 | 1398 | { |
66bdd22a | 1399 | struct channel *chan; |
57773204 | 1400 | unsigned long sb_bindex; |
74d81a6c MD |
1401 | struct lttng_ust_lib_ring_buffer *buf; |
1402 | struct ustctl_consumer_channel *consumer_chan; | |
34daae3e MD |
1403 | struct lttng_ust_lib_ring_buffer_backend_pages_shmp *barray_idx; |
1404 | struct lttng_ust_lib_ring_buffer_backend_pages *pages; | |
57773204 | 1405 | |
74d81a6c | 1406 | if (!stream) |
9bfc503d | 1407 | return -EINVAL; |
74d81a6c MD |
1408 | buf = stream->buf; |
1409 | consumer_chan = stream->chan; | |
1410 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1411 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1412 | return -EINVAL; | |
1413 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1414 | buf->backend.buf_rsb.id); |
34daae3e MD |
1415 | barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array, |
1416 | sb_bindex); | |
1417 | if (!barray_idx) | |
1418 | return -EINVAL; | |
1419 | pages = shmp(consumer_chan->chan->handle, barray_idx->shmp); | |
1420 | if (!pages) | |
1421 | return -EINVAL; | |
1422 | *off = pages->mmap_offset; | |
57773204 MD |
1423 | return 0; |
1424 | } | |
1425 | ||
1426 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1427 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1428 | unsigned long *len) | |
57773204 | 1429 | { |
74d81a6c | 1430 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1431 | struct channel *chan; |
74d81a6c | 1432 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1433 | |
74d81a6c | 1434 | if (!stream) |
9bfc503d MD |
1435 | return -EINVAL; |
1436 | ||
74d81a6c MD |
1437 | buf = stream->buf; |
1438 | consumer_chan = stream->chan; | |
1439 | chan = consumer_chan->chan->chan; | |
57773204 | 1440 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1441 | consumer_chan->chan->handle); |
57773204 MD |
1442 | return 0; |
1443 | } | |
1444 | ||
1445 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1446 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1447 | unsigned long *len) | |
57773204 | 1448 | { |
74d81a6c | 1449 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1450 | struct channel *chan; |
74d81a6c | 1451 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1452 | |
74d81a6c | 1453 | if (!stream) |
9bfc503d | 1454 | return -EINVAL; |
74d81a6c MD |
1455 | buf = stream->buf; |
1456 | consumer_chan = stream->chan; | |
1457 | chan = consumer_chan->chan->chan; | |
57773204 | 1458 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1459 | consumer_chan->chan->handle); |
57773204 MD |
1460 | *len = PAGE_ALIGN(*len); |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1465 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1466 | { |
74d81a6c MD |
1467 | struct lttng_ust_lib_ring_buffer *buf; |
1468 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1469 | |
74d81a6c MD |
1470 | if (!stream) |
1471 | return -EINVAL; | |
1472 | buf = stream->buf; | |
1473 | consumer_chan = stream->chan; | |
1474 | return lib_ring_buffer_get_next_subbuf(buf, | |
1475 | consumer_chan->chan->handle); | |
57773204 MD |
1476 | } |
1477 | ||
1478 | ||
1479 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1480 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1481 | { |
74d81a6c MD |
1482 | struct lttng_ust_lib_ring_buffer *buf; |
1483 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1484 | |
74d81a6c MD |
1485 | if (!stream) |
1486 | return -EINVAL; | |
1487 | buf = stream->buf; | |
1488 | consumer_chan = stream->chan; | |
1489 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1490 | return 0; |
1491 | } | |
1492 | ||
1493 | /* snapshot */ | |
1494 | ||
1495 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1496 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1497 | { |
74d81a6c MD |
1498 | struct lttng_ust_lib_ring_buffer *buf; |
1499 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1500 | |
74d81a6c MD |
1501 | if (!stream) |
1502 | return -EINVAL; | |
1503 | buf = stream->buf; | |
1504 | consumer_chan = stream->chan; | |
57773204 | 1505 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1506 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1507 | } |
1508 | ||
f45930b7 JG |
1509 | /* |
1510 | * Get a snapshot of the current ring buffer producer and consumer positions | |
1511 | * even if the consumed and produced positions are contained within the same | |
1512 | * subbuffer. | |
1513 | */ | |
1514 | int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream) | |
1515 | { | |
1516 | struct lttng_ust_lib_ring_buffer *buf; | |
1517 | struct ustctl_consumer_channel *consumer_chan; | |
1518 | ||
1519 | if (!stream) | |
1520 | return -EINVAL; | |
1521 | buf = stream->buf; | |
1522 | consumer_chan = stream->chan; | |
1523 | return lib_ring_buffer_snapshot_sample_positions(buf, | |
1524 | &buf->cons_snapshot, &buf->prod_snapshot, | |
1525 | consumer_chan->chan->handle); | |
1526 | } | |
1527 | ||
57773204 | 1528 | /* Get the consumer position (iteration start) */ |
74d81a6c MD |
1529 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1530 | unsigned long *pos) | |
57773204 | 1531 | { |
74d81a6c | 1532 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1533 | |
74d81a6c MD |
1534 | if (!stream) |
1535 | return -EINVAL; | |
1536 | buf = stream->buf; | |
57773204 MD |
1537 | *pos = buf->cons_snapshot; |
1538 | return 0; | |
1539 | } | |
1540 | ||
1541 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1542 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1543 | unsigned long *pos) | |
57773204 | 1544 | { |
74d81a6c | 1545 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1546 | |
74d81a6c MD |
1547 | if (!stream) |
1548 | return -EINVAL; | |
1549 | buf = stream->buf; | |
57773204 MD |
1550 | *pos = buf->prod_snapshot; |
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1555 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1556 | unsigned long *pos) | |
57773204 | 1557 | { |
74d81a6c MD |
1558 | struct lttng_ust_lib_ring_buffer *buf; |
1559 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1560 | |
74d81a6c MD |
1561 | if (!stream) |
1562 | return -EINVAL; | |
1563 | buf = stream->buf; | |
1564 | consumer_chan = stream->chan; | |
1565 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1566 | consumer_chan->chan->handle); | |
57773204 MD |
1567 | } |
1568 | ||
1569 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1570 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1571 | { |
74d81a6c MD |
1572 | struct lttng_ust_lib_ring_buffer *buf; |
1573 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1574 | |
74d81a6c MD |
1575 | if (!stream) |
1576 | return -EINVAL; | |
1577 | buf = stream->buf; | |
1578 | consumer_chan = stream->chan; | |
1579 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1580 | return 0; |
1581 | } | |
1582 | ||
74d81a6c | 1583 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1584 | int producer_active) |
57773204 | 1585 | { |
74d81a6c MD |
1586 | struct lttng_ust_lib_ring_buffer *buf; |
1587 | struct ustctl_consumer_channel *consumer_chan; | |
1588 | ||
1589 | assert(stream); | |
1590 | buf = stream->buf; | |
1591 | consumer_chan = stream->chan; | |
b52190f2 MD |
1592 | lib_ring_buffer_switch_slow(buf, |
1593 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1594 | consumer_chan->chan->handle); |
1595 | } | |
1596 | ||
beca55a1 MD |
1597 | void ustctl_clear_buffer(struct ustctl_consumer_stream *stream) |
1598 | { | |
1599 | struct lttng_ust_lib_ring_buffer *buf; | |
1600 | struct ustctl_consumer_channel *consumer_chan; | |
1601 | ||
1602 | assert(stream); | |
1603 | buf = stream->buf; | |
1604 | consumer_chan = stream->chan; | |
1605 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, | |
1606 | consumer_chan->chan->handle); | |
1607 | lib_ring_buffer_clear_reader(buf, consumer_chan->chan->handle); | |
1608 | } | |
1609 | ||
b2f3252a JD |
1610 | static |
1611 | struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb( | |
1612 | struct lttng_ust_lib_ring_buffer *buf, | |
1613 | struct lttng_ust_shm_handle *handle) | |
1614 | { | |
1615 | struct channel *chan; | |
1616 | const struct lttng_ust_lib_ring_buffer_config *config; | |
1617 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1618 | ||
1619 | chan = shmp(handle, buf->backend.chan); | |
34daae3e MD |
1620 | if (!chan) |
1621 | return NULL; | |
b2f3252a JD |
1622 | config = &chan->backend.config; |
1623 | if (!config->cb_ptr) | |
1624 | return NULL; | |
1625 | client_cb = caa_container_of(config->cb_ptr, | |
1626 | struct lttng_ust_client_lib_ring_buffer_client_cb, | |
1627 | parent); | |
1628 | return client_cb; | |
1629 | } | |
1630 | ||
1631 | int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream, | |
1632 | uint64_t *timestamp_begin) | |
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_begin) | |
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_begin(buf, handle, timestamp_begin); | |
1646 | } | |
1647 | ||
1648 | int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream, | |
1649 | uint64_t *timestamp_end) | |
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 || !timestamp_end) | |
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->timestamp_end(buf, handle, timestamp_end); | |
1663 | } | |
1664 | ||
1665 | int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream, | |
1666 | uint64_t *events_discarded) | |
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 || !events_discarded) | |
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->events_discarded(buf, handle, events_discarded); | |
1680 | } | |
1681 | ||
1682 | int ustctl_get_content_size(struct ustctl_consumer_stream *stream, | |
1683 | uint64_t *content_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 || !content_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->content_size(buf, handle, content_size); | |
1697 | } | |
1698 | ||
1699 | int ustctl_get_packet_size(struct ustctl_consumer_stream *stream, | |
1700 | uint64_t *packet_size) | |
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 || !packet_size) | |
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->packet_size(buf, handle, packet_size); | |
1714 | } | |
1715 | ||
1716 | int ustctl_get_stream_id(struct ustctl_consumer_stream *stream, | |
1717 | uint64_t *stream_id) | |
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; | |
b2f3252a JD |
1722 | |
1723 | if (!stream || !stream_id) | |
1724 | return -EINVAL; | |
e1919a41 MD |
1725 | buf = stream->buf; |
1726 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1727 | client_cb = get_client_cb(buf, handle); |
1728 | if (!client_cb) | |
1729 | return -ENOSYS; | |
1730 | return client_cb->stream_id(buf, handle, stream_id); | |
1731 | } | |
1732 | ||
fca361e8 JD |
1733 | int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream, |
1734 | uint64_t *ts) | |
1735 | { | |
1736 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1737 | struct lttng_ust_lib_ring_buffer *buf; |
1738 | struct lttng_ust_shm_handle *handle; | |
fca361e8 JD |
1739 | |
1740 | if (!stream || !ts) | |
1741 | return -EINVAL; | |
e1919a41 MD |
1742 | buf = stream->buf; |
1743 | handle = stream->chan->chan->handle; | |
fca361e8 JD |
1744 | client_cb = get_client_cb(buf, handle); |
1745 | if (!client_cb || !client_cb->current_timestamp) | |
1746 | return -ENOSYS; | |
1747 | return client_cb->current_timestamp(buf, handle, ts); | |
1748 | } | |
1749 | ||
1ff31389 JD |
1750 | int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream, |
1751 | uint64_t *seq) | |
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 || !seq) | |
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 || !client_cb->sequence_number) | |
1763 | return -ENOSYS; | |
1764 | return client_cb->sequence_number(buf, handle, seq); | |
1765 | } | |
1766 | ||
45a00b05 JD |
1767 | int ustctl_get_instance_id(struct ustctl_consumer_stream *stream, |
1768 | uint64_t *id) | |
1769 | { | |
1770 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1771 | struct lttng_ust_lib_ring_buffer *buf; | |
1772 | struct lttng_ust_shm_handle *handle; | |
1773 | ||
1774 | if (!stream || !id) | |
1775 | return -EINVAL; | |
1776 | buf = stream->buf; | |
1777 | handle = stream->chan->chan->handle; | |
1778 | client_cb = get_client_cb(buf, handle); | |
1779 | if (!client_cb) | |
1780 | return -ENOSYS; | |
1781 | return client_cb->instance_id(buf, handle, id); | |
1782 | } | |
1783 | ||
c62a3816 | 1784 | #ifdef LTTNG_UST_HAVE_PERF_EVENT |
57201bb3 MD |
1785 | |
1786 | int ustctl_has_perf_counters(void) | |
1787 | { | |
1788 | return 1; | |
1789 | } | |
1790 | ||
1791 | #else | |
1792 | ||
1793 | int ustctl_has_perf_counters(void) | |
1794 | { | |
1795 | return 0; | |
1796 | } | |
1797 | ||
1798 | #endif | |
1799 | ||
32ce8569 MD |
1800 | /* |
1801 | * Returns 0 on success, negative error value on error. | |
1802 | */ | |
1803 | int ustctl_recv_reg_msg(int sock, | |
1804 | enum ustctl_socket_type *type, | |
1805 | uint32_t *major, | |
1806 | uint32_t *minor, | |
1807 | uint32_t *pid, | |
1808 | uint32_t *ppid, | |
1809 | uint32_t *uid, | |
1810 | uint32_t *gid, | |
1811 | uint32_t *bits_per_long, | |
1812 | uint32_t *uint8_t_alignment, | |
1813 | uint32_t *uint16_t_alignment, | |
1814 | uint32_t *uint32_t_alignment, | |
1815 | uint32_t *uint64_t_alignment, | |
1816 | uint32_t *long_alignment, | |
1817 | int *byte_order, | |
1818 | char *name) | |
1819 | { | |
1820 | ssize_t len; | |
1821 | struct ustctl_reg_msg reg_msg; | |
1822 | ||
1823 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
1824 | if (len > 0 && len != sizeof(reg_msg)) | |
1825 | return -EIO; | |
1826 | if (len == 0) | |
1827 | return -EPIPE; | |
1828 | if (len < 0) | |
1829 | return len; | |
1830 | ||
1831 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
1832 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1833 | BIG_ENDIAN : LITTLE_ENDIAN; | |
1834 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
1835 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1836 | LITTLE_ENDIAN : BIG_ENDIAN; | |
1837 | } else { | |
1838 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
1839 | } | |
1840 | switch (reg_msg.socket_type) { | |
1841 | case 0: *type = USTCTL_SOCKET_CMD; | |
1842 | break; | |
1843 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
1844 | break; | |
1845 | default: | |
1846 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
1847 | } | |
1848 | *major = reg_msg.major; | |
1849 | *minor = reg_msg.minor; | |
1850 | *pid = reg_msg.pid; | |
1851 | *ppid = reg_msg.ppid; | |
1852 | *uid = reg_msg.uid; | |
1853 | *gid = reg_msg.gid; | |
1854 | *bits_per_long = reg_msg.bits_per_long; | |
1855 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
1856 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
1857 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
1858 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
1859 | *long_alignment = reg_msg.long_alignment; | |
1860 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
6a359b8a MD |
1861 | if (reg_msg.major < LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE || |
1862 | reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) { | |
32ce8569 MD |
1863 | return -LTTNG_UST_ERR_UNSUP_MAJOR; |
1864 | } | |
1865 | ||
1866 | return 0; | |
1867 | } | |
1868 | ||
1869 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
1870 | { | |
1871 | struct ustcomm_notify_hdr header; | |
1872 | ssize_t len; | |
1873 | ||
1874 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
1875 | if (len > 0 && len != sizeof(header)) | |
1876 | return -EIO; | |
1877 | if (len == 0) | |
1878 | return -EPIPE; | |
1879 | if (len < 0) | |
1880 | return len; | |
1881 | switch (header.notify_cmd) { | |
1882 | case 0: | |
1883 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1884 | break; | |
1885 | case 1: | |
1886 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1887 | break; | |
c785c634 MD |
1888 | case 2: |
1889 | *notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1890 | break; | |
32ce8569 MD |
1891 | default: |
1892 | return -EINVAL; | |
1893 | } | |
1894 | return 0; | |
1895 | } | |
1896 | ||
1897 | /* | |
1898 | * Returns 0 on success, negative error value on error. | |
1899 | */ | |
1900 | int ustctl_recv_register_event(int sock, | |
1901 | int *session_objd, | |
1902 | int *channel_objd, | |
1903 | char *event_name, | |
1904 | int *loglevel, | |
1905 | char **signature, | |
1906 | size_t *nr_fields, | |
1907 | struct ustctl_field **fields, | |
1908 | char **model_emf_uri) | |
1909 | { | |
1910 | ssize_t len; | |
1911 | struct ustcomm_notify_event_msg msg; | |
1912 | size_t signature_len, fields_len, model_emf_uri_len; | |
1913 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
1914 | struct ustctl_field *a_fields = NULL; | |
1915 | ||
1916 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1917 | if (len > 0 && len != sizeof(msg)) | |
1918 | return -EIO; | |
1919 | if (len == 0) | |
1920 | return -EPIPE; | |
1921 | if (len < 0) | |
1922 | return len; | |
1923 | ||
1924 | *session_objd = msg.session_objd; | |
1925 | *channel_objd = msg.channel_objd; | |
1926 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1927 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1928 | *loglevel = msg.loglevel; | |
1929 | signature_len = msg.signature_len; | |
1930 | fields_len = msg.fields_len; | |
1931 | ||
1932 | if (fields_len % sizeof(*a_fields) != 0) { | |
1933 | return -EINVAL; | |
1934 | } | |
1935 | ||
1936 | model_emf_uri_len = msg.model_emf_uri_len; | |
1937 | ||
1938 | /* recv signature. contains at least \0. */ | |
1939 | a_sign = zmalloc(signature_len); | |
1940 | if (!a_sign) | |
1941 | return -ENOMEM; | |
1942 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
1943 | if (len > 0 && len != signature_len) { | |
1944 | len = -EIO; | |
1945 | goto signature_error; | |
1946 | } | |
1947 | if (len == 0) { | |
1948 | len = -EPIPE; | |
1949 | goto signature_error; | |
1950 | } | |
1951 | if (len < 0) { | |
1952 | goto signature_error; | |
1953 | } | |
1954 | /* Enforce end of string */ | |
111198c2 | 1955 | a_sign[signature_len - 1] = '\0'; |
32ce8569 MD |
1956 | |
1957 | /* recv fields */ | |
1958 | if (fields_len) { | |
1959 | a_fields = zmalloc(fields_len); | |
1960 | if (!a_fields) { | |
1961 | len = -ENOMEM; | |
1962 | goto signature_error; | |
1963 | } | |
1964 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1965 | if (len > 0 && len != fields_len) { | |
1966 | len = -EIO; | |
1967 | goto fields_error; | |
1968 | } | |
1969 | if (len == 0) { | |
1970 | len = -EPIPE; | |
1971 | goto fields_error; | |
1972 | } | |
1973 | if (len < 0) { | |
1974 | goto fields_error; | |
1975 | } | |
1976 | } | |
1977 | ||
1978 | if (model_emf_uri_len) { | |
1979 | /* recv model_emf_uri_len */ | |
1980 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
1981 | if (!a_model_emf_uri) { | |
1982 | len = -ENOMEM; | |
1983 | goto fields_error; | |
1984 | } | |
1985 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
1986 | model_emf_uri_len); | |
1987 | if (len > 0 && len != model_emf_uri_len) { | |
1988 | len = -EIO; | |
1989 | goto model_error; | |
1990 | } | |
1991 | if (len == 0) { | |
1992 | len = -EPIPE; | |
1993 | goto model_error; | |
1994 | } | |
1995 | if (len < 0) { | |
1996 | goto model_error; | |
1997 | } | |
1998 | /* Enforce end of string */ | |
1999 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
2000 | } | |
2001 | ||
2002 | *signature = a_sign; | |
2003 | *nr_fields = fields_len / sizeof(*a_fields); | |
2004 | *fields = a_fields; | |
2005 | *model_emf_uri = a_model_emf_uri; | |
2006 | ||
2007 | return 0; | |
2008 | ||
2009 | model_error: | |
2010 | free(a_model_emf_uri); | |
2011 | fields_error: | |
2012 | free(a_fields); | |
2013 | signature_error: | |
2014 | free(a_sign); | |
2015 | return len; | |
2016 | } | |
2017 | ||
2018 | /* | |
2019 | * Returns 0 on success, negative error value on error. | |
2020 | */ | |
2021 | int ustctl_reply_register_event(int sock, | |
2022 | uint32_t id, | |
2023 | int ret_code) | |
2024 | { | |
2025 | ssize_t len; | |
2026 | struct { | |
2027 | struct ustcomm_notify_hdr header; | |
2028 | struct ustcomm_notify_event_reply r; | |
2029 | } reply; | |
2030 | ||
2031 | memset(&reply, 0, sizeof(reply)); | |
2032 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
2033 | reply.r.ret_code = ret_code; | |
2034 | reply.r.event_id = id; | |
2035 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2036 | if (len > 0 && len != sizeof(reply)) | |
2037 | return -EIO; | |
2038 | if (len < 0) | |
2039 | return len; | |
2040 | return 0; | |
2041 | } | |
2042 | ||
c785c634 MD |
2043 | /* |
2044 | * Returns 0 on success, negative UST or system error value on error. | |
2045 | */ | |
2046 | int ustctl_recv_register_enum(int sock, | |
2047 | int *session_objd, | |
2048 | char *enum_name, | |
2049 | struct ustctl_enum_entry **entries, | |
2050 | size_t *nr_entries) | |
2051 | { | |
2052 | ssize_t len; | |
2053 | struct ustcomm_notify_enum_msg msg; | |
2054 | size_t entries_len; | |
2055 | struct ustctl_enum_entry *a_entries = NULL; | |
2056 | ||
2057 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2058 | if (len > 0 && len != sizeof(msg)) | |
2059 | return -EIO; | |
2060 | if (len == 0) | |
2061 | return -EPIPE; | |
2062 | if (len < 0) | |
2063 | return len; | |
2064 | ||
2065 | *session_objd = msg.session_objd; | |
2066 | strncpy(enum_name, msg.enum_name, LTTNG_UST_SYM_NAME_LEN); | |
2067 | enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2068 | entries_len = msg.entries_len; | |
2069 | ||
2070 | if (entries_len % sizeof(*a_entries) != 0) { | |
2071 | return -EINVAL; | |
2072 | } | |
2073 | ||
2074 | /* recv entries */ | |
2075 | if (entries_len) { | |
2076 | a_entries = zmalloc(entries_len); | |
2077 | if (!a_entries) | |
2078 | return -ENOMEM; | |
2079 | len = ustcomm_recv_unix_sock(sock, a_entries, entries_len); | |
2080 | if (len > 0 && len != entries_len) { | |
2081 | len = -EIO; | |
2082 | goto entries_error; | |
2083 | } | |
2084 | if (len == 0) { | |
2085 | len = -EPIPE; | |
2086 | goto entries_error; | |
2087 | } | |
2088 | if (len < 0) { | |
2089 | goto entries_error; | |
2090 | } | |
2091 | } | |
2092 | *nr_entries = entries_len / sizeof(*a_entries); | |
2093 | *entries = a_entries; | |
2094 | ||
2095 | return 0; | |
2096 | ||
2097 | entries_error: | |
2098 | free(a_entries); | |
2099 | return len; | |
2100 | } | |
2101 | ||
2102 | /* | |
2103 | * Returns 0 on success, negative error value on error. | |
2104 | */ | |
2105 | int ustctl_reply_register_enum(int sock, | |
2106 | uint64_t id, | |
2107 | int ret_code) | |
2108 | { | |
2109 | ssize_t len; | |
2110 | struct { | |
2111 | struct ustcomm_notify_hdr header; | |
2112 | struct ustcomm_notify_enum_reply r; | |
2113 | } reply; | |
2114 | ||
2115 | memset(&reply, 0, sizeof(reply)); | |
2116 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
2117 | reply.r.ret_code = ret_code; | |
2118 | reply.r.enum_id = id; | |
2119 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2120 | if (len > 0 && len != sizeof(reply)) | |
2121 | return -EIO; | |
2122 | if (len < 0) | |
2123 | return len; | |
2124 | return 0; | |
2125 | } | |
2126 | ||
32ce8569 MD |
2127 | /* |
2128 | * Returns 0 on success, negative UST or system error value on error. | |
2129 | */ | |
2130 | int ustctl_recv_register_channel(int sock, | |
2131 | int *session_objd, /* session descriptor (output) */ | |
2132 | int *channel_objd, /* channel descriptor (output) */ | |
2133 | size_t *nr_fields, | |
2134 | struct ustctl_field **fields) | |
2135 | { | |
2136 | ssize_t len; | |
2137 | struct ustcomm_notify_channel_msg msg; | |
2138 | size_t fields_len; | |
2139 | struct ustctl_field *a_fields; | |
2140 | ||
2141 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2142 | if (len > 0 && len != sizeof(msg)) | |
2143 | return -EIO; | |
2144 | if (len == 0) | |
2145 | return -EPIPE; | |
2146 | if (len < 0) | |
2147 | return len; | |
2148 | ||
2149 | *session_objd = msg.session_objd; | |
2150 | *channel_objd = msg.channel_objd; | |
2151 | fields_len = msg.ctx_fields_len; | |
2152 | ||
2153 | if (fields_len % sizeof(*a_fields) != 0) { | |
2154 | return -EINVAL; | |
2155 | } | |
2156 | ||
2157 | /* recv fields */ | |
2158 | if (fields_len) { | |
2159 | a_fields = zmalloc(fields_len); | |
2160 | if (!a_fields) { | |
2161 | len = -ENOMEM; | |
2162 | goto alloc_error; | |
2163 | } | |
2164 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2165 | if (len > 0 && len != fields_len) { | |
2166 | len = -EIO; | |
2167 | goto fields_error; | |
2168 | } | |
2169 | if (len == 0) { | |
2170 | len = -EPIPE; | |
2171 | goto fields_error; | |
2172 | } | |
2173 | if (len < 0) { | |
2174 | goto fields_error; | |
2175 | } | |
2176 | *fields = a_fields; | |
2177 | } else { | |
2178 | *fields = NULL; | |
2179 | } | |
2180 | *nr_fields = fields_len / sizeof(*a_fields); | |
2181 | return 0; | |
2182 | ||
2183 | fields_error: | |
2184 | free(a_fields); | |
2185 | alloc_error: | |
2186 | return len; | |
2187 | } | |
2188 | ||
2189 | /* | |
2190 | * Returns 0 on success, negative error value on error. | |
2191 | */ | |
2192 | int ustctl_reply_register_channel(int sock, | |
2193 | uint32_t chan_id, | |
2194 | enum ustctl_channel_header header_type, | |
2195 | int ret_code) | |
2196 | { | |
2197 | ssize_t len; | |
2198 | struct { | |
2199 | struct ustcomm_notify_hdr header; | |
2200 | struct ustcomm_notify_channel_reply r; | |
2201 | } reply; | |
2202 | ||
2203 | memset(&reply, 0, sizeof(reply)); | |
2204 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
2205 | reply.r.ret_code = ret_code; | |
2206 | reply.r.chan_id = chan_id; | |
2207 | switch (header_type) { | |
2208 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
2209 | reply.r.header_type = 1; | |
2210 | break; | |
2211 | case USTCTL_CHANNEL_HEADER_LARGE: | |
2212 | reply.r.header_type = 2; | |
2213 | break; | |
2214 | default: | |
2215 | reply.r.header_type = 0; | |
2216 | break; | |
2217 | } | |
2218 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2219 | if (len > 0 && len != sizeof(reply)) | |
2220 | return -EIO; | |
2221 | if (len < 0) | |
2222 | return len; | |
2223 | return 0; | |
2224 | } | |
2225 | ||
f53329f3 JD |
2226 | /* Regenerate the statedump. */ |
2227 | int ustctl_regenerate_statedump(int sock, int handle) | |
2228 | { | |
2229 | struct ustcomm_ust_msg lum; | |
2230 | struct ustcomm_ust_reply lur; | |
2231 | int ret; | |
2232 | ||
2233 | memset(&lum, 0, sizeof(lum)); | |
2234 | lum.handle = handle; | |
2235 | lum.cmd = LTTNG_UST_SESSION_STATEDUMP; | |
2236 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
2237 | if (ret) | |
2238 | return ret; | |
2239 | DBG("Regenerated statedump for handle %u", handle); | |
2240 | return 0; | |
2241 | } | |
2242 | ||
74d81a6c MD |
2243 | static __attribute__((constructor)) |
2244 | void ustctl_init(void) | |
2245 | { | |
2246 | init_usterr(); | |
6f626d28 | 2247 | lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */ |
f9364363 | 2248 | lttng_ust_clock_init(); |
74d81a6c MD |
2249 | lttng_ring_buffer_metadata_client_init(); |
2250 | lttng_ring_buffer_client_overwrite_init(); | |
34a91bdb | 2251 | lttng_ring_buffer_client_overwrite_rt_init(); |
74d81a6c | 2252 | lttng_ring_buffer_client_discard_init(); |
34a91bdb | 2253 | lttng_ring_buffer_client_discard_rt_init(); |
03d2d293 | 2254 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
2255 | } |
2256 | ||
2257 | static __attribute__((destructor)) | |
2258 | void ustctl_exit(void) | |
2259 | { | |
34a91bdb | 2260 | lttng_ring_buffer_client_discard_rt_exit(); |
74d81a6c | 2261 | lttng_ring_buffer_client_discard_exit(); |
34a91bdb | 2262 | lttng_ring_buffer_client_overwrite_rt_exit(); |
74d81a6c MD |
2263 | lttng_ring_buffer_client_overwrite_exit(); |
2264 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 2265 | } |