Commit | Line | Data |
---|---|---|
57773204 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
74d81a6c | 3 | * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
57773204 | 4 | * |
e92f3e28 MD |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; version 2 of the License only. | |
57773204 MD |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
e92f3e28 MD |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
57773204 MD |
17 | */ |
18 | ||
9d335227 | 19 | #define _GNU_SOURCE |
57773204 | 20 | #include <string.h> |
c62a3816 | 21 | #include <lttng/ust-config.h> |
4318ae1b MD |
22 | #include <lttng/ust-ctl.h> |
23 | #include <lttng/ust-abi.h> | |
c1fca457 | 24 | #include <lttng/ust-events.h> |
7a784989 | 25 | #include <sys/mman.h> |
32ce8569 | 26 | #include <byteswap.h> |
44c72f10 MD |
27 | |
28 | #include <usterr-signal-safe.h> | |
b728d87e | 29 | #include <ust-comm.h> |
74d81a6c | 30 | #include <helper.h> |
57773204 MD |
31 | |
32 | #include "../libringbuffer/backend.h" | |
33 | #include "../libringbuffer/frontend.h" | |
c9023c93 | 34 | #include "../liblttng-ust/wait.h" |
b2f3252a | 35 | #include "../liblttng-ust/lttng-rb-clients.h" |
f9364363 | 36 | #include "../liblttng-ust/clock.h" |
92ce256d | 37 | #include "../liblttng-ust/getenv.h" |
c9023c93 MD |
38 | |
39 | /* | |
40 | * Number of milliseconds to retry before failing metadata writes on | |
41 | * buffer full condition. (10 seconds) | |
42 | */ | |
43 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 | |
57773204 | 44 | |
74d81a6c MD |
45 | /* |
46 | * Channel representation within consumer. | |
47 | */ | |
48 | struct ustctl_consumer_channel { | |
49 | struct lttng_channel *chan; /* lttng channel buffers */ | |
6b120308 | 50 | |
74d81a6c MD |
51 | /* initial attributes */ |
52 | struct ustctl_consumer_channel_attr attr; | |
ff0f5728 MD |
53 | int wait_fd; /* monitor close() */ |
54 | int wakeup_fd; /* monitor close() */ | |
74d81a6c MD |
55 | }; |
56 | ||
57 | /* | |
58 | * Stream representation within consumer. | |
59 | */ | |
60 | struct ustctl_consumer_stream { | |
61 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
62 | struct lttng_ust_lib_ring_buffer *buf; | |
63 | struct ustctl_consumer_channel *chan; | |
64 | int shm_fd, wait_fd, wakeup_fd; | |
65 | int cpu; | |
66 | uint64_t memory_map_size; | |
67 | }; | |
68 | ||
69 | extern void lttng_ring_buffer_client_overwrite_init(void); | |
08a3170c | 70 | extern void lttng_ring_buffer_client_overwrite_rt_init(void); |
74d81a6c | 71 | extern void lttng_ring_buffer_client_discard_init(void); |
08a3170c | 72 | extern void lttng_ring_buffer_client_discard_rt_init(void); |
74d81a6c MD |
73 | extern void lttng_ring_buffer_metadata_client_init(void); |
74 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
08a3170c | 75 | extern void lttng_ring_buffer_client_overwrite_rt_exit(void); |
74d81a6c | 76 | extern void lttng_ring_buffer_client_discard_exit(void); |
08a3170c | 77 | extern void lttng_ring_buffer_client_discard_rt_exit(void); |
74d81a6c MD |
78 | extern void lttng_ring_buffer_metadata_client_exit(void); |
79 | ||
2be0e72c MD |
80 | int ustctl_release_handle(int sock, int handle) |
81 | { | |
82 | struct ustcomm_ust_msg lum; | |
83 | struct ustcomm_ust_reply lur; | |
2be0e72c | 84 | |
74d81a6c MD |
85 | if (sock < 0 || handle < 0) |
86 | return 0; | |
87 | memset(&lum, 0, sizeof(lum)); | |
88 | lum.handle = handle; | |
89 | lum.cmd = LTTNG_UST_RELEASE; | |
90 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 91 | } |
74d81a6c | 92 | |
12388166 MD |
93 | /* |
94 | * If sock is negative, it means we don't have to notify the other side | |
95 | * (e.g. application has already vanished). | |
96 | */ | |
d26228ae | 97 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 98 | { |
57773204 MD |
99 | int ret; |
100 | ||
9bfc503d MD |
101 | if (!data) |
102 | return -EINVAL; | |
103 | ||
74d81a6c MD |
104 | switch (data->type) { |
105 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
ff0f5728 MD |
106 | if (data->u.channel.wakeup_fd >= 0) { |
107 | ret = close(data->u.channel.wakeup_fd); | |
108 | if (ret < 0) { | |
109 | ret = -errno; | |
110 | return ret; | |
111 | } | |
112 | } | |
74d81a6c MD |
113 | free(data->u.channel.data); |
114 | break; | |
115 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
116 | if (data->u.stream.shm_fd >= 0) { | |
117 | ret = close(data->u.stream.shm_fd); | |
118 | if (ret < 0) { | |
119 | ret = -errno; | |
120 | return ret; | |
121 | } | |
d26228ae | 122 | } |
74d81a6c MD |
123 | if (data->u.stream.wakeup_fd >= 0) { |
124 | ret = close(data->u.stream.wakeup_fd); | |
125 | if (ret < 0) { | |
126 | ret = -errno; | |
127 | return ret; | |
128 | } | |
d26228ae | 129 | } |
74d81a6c | 130 | break; |
32ce8569 MD |
131 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
132 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
133 | break; | |
74d81a6c MD |
134 | default: |
135 | assert(0); | |
d26228ae | 136 | } |
2be0e72c | 137 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
138 | } |
139 | ||
1c5e467e MD |
140 | /* |
141 | * Send registration done packet to the application. | |
142 | */ | |
143 | int ustctl_register_done(int sock) | |
144 | { | |
145 | struct ustcomm_ust_msg lum; | |
146 | struct ustcomm_ust_reply lur; | |
147 | int ret; | |
148 | ||
149 | DBG("Sending register done command to %d", sock); | |
150 | memset(&lum, 0, sizeof(lum)); | |
151 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
152 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
153 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
154 | if (ret) | |
155 | return ret; | |
1c5e467e | 156 | return 0; |
1c5e467e MD |
157 | } |
158 | ||
57773204 MD |
159 | /* |
160 | * returns session handle. | |
161 | */ | |
162 | int ustctl_create_session(int sock) | |
163 | { | |
164 | struct ustcomm_ust_msg lum; | |
165 | struct ustcomm_ust_reply lur; | |
166 | int ret, session_handle; | |
167 | ||
168 | /* Create session */ | |
169 | memset(&lum, 0, sizeof(lum)); | |
170 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
171 | lum.cmd = LTTNG_UST_SESSION; | |
172 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
173 | if (ret) | |
174 | return ret; | |
175 | session_handle = lur.ret_val; | |
176 | DBG("received session handle %u", session_handle); | |
177 | return session_handle; | |
178 | } | |
179 | ||
57773204 | 180 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
181 | struct lttng_ust_object_data *channel_data, |
182 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
183 | { |
184 | struct ustcomm_ust_msg lum; | |
185 | struct ustcomm_ust_reply lur; | |
61f02aea | 186 | struct lttng_ust_object_data *event_data; |
57773204 MD |
187 | int ret; |
188 | ||
9bfc503d MD |
189 | if (!channel_data || !_event_data) |
190 | return -EINVAL; | |
191 | ||
74d81a6c | 192 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
193 | if (!event_data) |
194 | return -ENOMEM; | |
32ce8569 | 195 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
196 | memset(&lum, 0, sizeof(lum)); |
197 | lum.handle = channel_data->handle; | |
198 | lum.cmd = LTTNG_UST_EVENT; | |
199 | strncpy(lum.u.event.name, ev->name, | |
200 | LTTNG_UST_SYM_NAME_LEN); | |
201 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
202 | lum.u.event.loglevel_type = ev->loglevel_type; |
203 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
204 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
205 | if (ret) { | |
206 | free(event_data); | |
207 | return ret; | |
208 | } | |
209 | event_data->handle = lur.ret_val; | |
210 | DBG("received event handle %u", event_data->handle); | |
211 | *_event_data = event_data; | |
212 | return 0; | |
213 | } | |
214 | ||
53f0df51 | 215 | int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
61f02aea MD |
216 | struct lttng_ust_object_data *obj_data, |
217 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
218 | { |
219 | struct ustcomm_ust_msg lum; | |
220 | struct ustcomm_ust_reply lur; | |
53f0df51 JG |
221 | struct lttng_ust_object_data *context_data = NULL; |
222 | char *buf = NULL; | |
223 | size_t len; | |
57773204 MD |
224 | int ret; |
225 | ||
53f0df51 JG |
226 | if (!obj_data || !_context_data) { |
227 | ret = -EINVAL; | |
228 | goto end; | |
229 | } | |
9bfc503d | 230 | |
74d81a6c | 231 | context_data = zmalloc(sizeof(*context_data)); |
53f0df51 JG |
232 | if (!context_data) { |
233 | ret = -ENOMEM; | |
234 | goto end; | |
235 | } | |
32ce8569 | 236 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 237 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 238 | lum.handle = obj_data->handle; |
57773204 | 239 | lum.cmd = LTTNG_UST_CONTEXT; |
53f0df51 JG |
240 | |
241 | lum.u.context.ctx = ctx->ctx; | |
242 | switch (ctx->ctx) { | |
243 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
244 | lum.u.context.u.perf_counter = ctx->u.perf_counter; | |
245 | break; | |
246 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
247 | { | |
248 | size_t provider_name_len = strlen( | |
249 | ctx->u.app_ctx.provider_name) + 1; | |
250 | size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1; | |
251 | ||
252 | lum.u.context.u.app_ctx.provider_name_len = provider_name_len; | |
253 | lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len; | |
254 | ||
255 | len = provider_name_len + ctx_name_len; | |
256 | buf = zmalloc(len); | |
257 | if (!buf) { | |
258 | ret = -ENOMEM; | |
259 | goto end; | |
260 | } | |
261 | memcpy(buf, ctx->u.app_ctx.provider_name, | |
262 | provider_name_len); | |
263 | memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name, | |
264 | ctx_name_len); | |
265 | break; | |
266 | } | |
267 | default: | |
268 | break; | |
269 | } | |
270 | ret = ustcomm_send_app_msg(sock, &lum); | |
271 | if (ret) | |
272 | goto end; | |
273 | if (buf) { | |
274 | /* send var len ctx_name */ | |
275 | ret = ustcomm_send_unix_sock(sock, buf, len); | |
276 | if (ret < 0) { | |
277 | goto end; | |
278 | } | |
279 | if (ret != len) { | |
280 | ret = -EINVAL; | |
281 | goto end; | |
282 | } | |
283 | } | |
284 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
285 | if (ret < 0) { | |
286 | goto end; | |
57773204 | 287 | } |
32ce8569 MD |
288 | context_data->handle = -1; |
289 | DBG("Context created successfully"); | |
57773204 | 290 | *_context_data = context_data; |
53f0df51 JG |
291 | context_data = NULL; |
292 | end: | |
293 | free(context_data); | |
294 | free(buf); | |
57773204 MD |
295 | return ret; |
296 | } | |
297 | ||
cd54f6d9 MD |
298 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
299 | struct lttng_ust_object_data *obj_data) | |
300 | { | |
301 | struct ustcomm_ust_msg lum; | |
302 | struct ustcomm_ust_reply lur; | |
303 | int ret; | |
304 | ||
305 | if (!obj_data) | |
306 | return -EINVAL; | |
307 | ||
308 | memset(&lum, 0, sizeof(lum)); | |
309 | lum.handle = obj_data->handle; | |
310 | lum.cmd = LTTNG_UST_FILTER; | |
311 | lum.u.filter.data_size = bytecode->len; | |
312 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 313 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
314 | |
315 | ret = ustcomm_send_app_msg(sock, &lum); | |
316 | if (ret) | |
317 | return ret; | |
cd54f6d9 MD |
318 | /* send var len bytecode */ |
319 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
320 | bytecode->len); | |
321 | if (ret < 0) { | |
322 | return ret; | |
323 | } | |
7bc53e94 MD |
324 | if (ret != bytecode->len) |
325 | return -EINVAL; | |
326 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
327 | } |
328 | ||
da57c034 JI |
329 | int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion, |
330 | struct lttng_ust_object_data *obj_data) | |
331 | { | |
332 | struct ustcomm_ust_msg lum; | |
333 | struct ustcomm_ust_reply lur; | |
334 | int ret; | |
335 | ||
336 | if (!obj_data) { | |
337 | return -EINVAL; | |
338 | } | |
339 | ||
340 | memset(&lum, 0, sizeof(lum)); | |
341 | lum.handle = obj_data->handle; | |
342 | lum.cmd = LTTNG_UST_EXCLUSION; | |
343 | lum.u.exclusion.count = exclusion->count; | |
344 | ||
345 | ret = ustcomm_send_app_msg(sock, &lum); | |
346 | if (ret) { | |
347 | return ret; | |
348 | } | |
349 | ||
1628366f | 350 | /* send var len exclusion names */ |
da57c034 JI |
351 | ret = ustcomm_send_unix_sock(sock, |
352 | exclusion->names, | |
353 | exclusion->count * LTTNG_UST_SYM_NAME_LEN); | |
354 | if (ret < 0) { | |
355 | return ret; | |
356 | } | |
357 | if (ret != exclusion->count * LTTNG_UST_SYM_NAME_LEN) { | |
358 | return -EINVAL; | |
359 | } | |
360 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
361 | } | |
362 | ||
57773204 | 363 | /* Enable event, channel and session ioctl */ |
61f02aea | 364 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
365 | { |
366 | struct ustcomm_ust_msg lum; | |
367 | struct ustcomm_ust_reply lur; | |
368 | int ret; | |
369 | ||
9bfc503d MD |
370 | if (!object) |
371 | return -EINVAL; | |
372 | ||
57773204 MD |
373 | memset(&lum, 0, sizeof(lum)); |
374 | lum.handle = object->handle; | |
375 | lum.cmd = LTTNG_UST_ENABLE; | |
376 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
377 | if (ret) | |
378 | return ret; | |
379 | DBG("enabled handle %u", object->handle); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | /* Disable event, channel and session ioctl */ | |
61f02aea | 384 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
385 | { |
386 | struct ustcomm_ust_msg lum; | |
387 | struct ustcomm_ust_reply lur; | |
388 | int ret; | |
389 | ||
9bfc503d MD |
390 | if (!object) |
391 | return -EINVAL; | |
392 | ||
57773204 MD |
393 | memset(&lum, 0, sizeof(lum)); |
394 | lum.handle = object->handle; | |
395 | lum.cmd = LTTNG_UST_DISABLE; | |
396 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
397 | if (ret) | |
398 | return ret; | |
399 | DBG("disable handle %u", object->handle); | |
400 | return 0; | |
401 | } | |
402 | ||
4a6ca058 | 403 | int ustctl_start_session(int sock, int handle) |
57773204 | 404 | { |
61f02aea | 405 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
406 | |
407 | obj.handle = handle; | |
408 | return ustctl_enable(sock, &obj); | |
57773204 MD |
409 | } |
410 | ||
4a6ca058 | 411 | int ustctl_stop_session(int sock, int handle) |
57773204 | 412 | { |
61f02aea | 413 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
414 | |
415 | obj.handle = handle; | |
416 | return ustctl_disable(sock, &obj); | |
57773204 MD |
417 | } |
418 | ||
57773204 MD |
419 | int ustctl_tracepoint_list(int sock) |
420 | { | |
b115631f MD |
421 | struct ustcomm_ust_msg lum; |
422 | struct ustcomm_ust_reply lur; | |
423 | int ret, tp_list_handle; | |
424 | ||
425 | memset(&lum, 0, sizeof(lum)); | |
426 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
427 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
428 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
429 | if (ret) | |
430 | return ret; | |
431 | tp_list_handle = lur.ret_val; | |
432 | DBG("received tracepoint list handle %u", tp_list_handle); | |
433 | return tp_list_handle; | |
434 | } | |
435 | ||
436 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 437 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
438 | { |
439 | struct ustcomm_ust_msg lum; | |
440 | struct ustcomm_ust_reply lur; | |
441 | int ret; | |
442 | ||
9bfc503d MD |
443 | if (!iter) |
444 | return -EINVAL; | |
445 | ||
b115631f MD |
446 | memset(&lum, 0, sizeof(lum)); |
447 | lum.handle = tp_list_handle; | |
448 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
449 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
450 | if (ret) | |
451 | return ret; | |
882a56d7 | 452 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 453 | lur.u.tracepoint.name, |
882a56d7 | 454 | lur.u.tracepoint.loglevel); |
cbef6901 | 455 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 456 | return 0; |
57773204 MD |
457 | } |
458 | ||
40003310 MD |
459 | int ustctl_tracepoint_field_list(int sock) |
460 | { | |
461 | struct ustcomm_ust_msg lum; | |
462 | struct ustcomm_ust_reply lur; | |
463 | int ret, tp_field_list_handle; | |
464 | ||
465 | memset(&lum, 0, sizeof(lum)); | |
466 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
467 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
468 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
469 | if (ret) | |
470 | return ret; | |
471 | tp_field_list_handle = lur.ret_val; | |
472 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
473 | return tp_field_list_handle; | |
474 | } | |
475 | ||
476 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
477 | struct lttng_ust_field_iter *iter) | |
478 | { | |
479 | struct ustcomm_ust_msg lum; | |
480 | struct ustcomm_ust_reply lur; | |
481 | int ret; | |
482 | ssize_t len; | |
483 | ||
484 | if (!iter) | |
485 | return -EINVAL; | |
486 | ||
487 | memset(&lum, 0, sizeof(lum)); | |
488 | lum.handle = tp_field_list_handle; | |
489 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
490 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
491 | if (ret) | |
492 | return ret; | |
493 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
494 | if (len != sizeof(*iter)) { | |
495 | return -EINVAL; | |
496 | } | |
497 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
498 | iter->event_name, | |
499 | iter->loglevel, | |
500 | iter->field_name, | |
501 | iter->type); | |
502 | return 0; | |
503 | } | |
504 | ||
57773204 MD |
505 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
506 | { | |
507 | struct ustcomm_ust_msg lum; | |
508 | struct ustcomm_ust_reply lur; | |
509 | int ret; | |
510 | ||
9bfc503d MD |
511 | if (!v) |
512 | return -EINVAL; | |
513 | ||
57773204 MD |
514 | memset(&lum, 0, sizeof(lum)); |
515 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
516 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
517 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
518 | if (ret) | |
519 | return ret; | |
520 | memcpy(v, &lur.u.version, sizeof(*v)); | |
521 | DBG("received tracer version"); | |
522 | return 0; | |
523 | } | |
524 | ||
525 | int ustctl_wait_quiescent(int sock) | |
526 | { | |
527 | struct ustcomm_ust_msg lum; | |
528 | struct ustcomm_ust_reply lur; | |
529 | int ret; | |
530 | ||
531 | memset(&lum, 0, sizeof(lum)); | |
532 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
533 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
534 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
535 | if (ret) | |
536 | return ret; | |
537 | DBG("waited for quiescent state"); | |
538 | return 0; | |
539 | } | |
540 | ||
541 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
542 | { | |
9bfc503d MD |
543 | if (!calibrate) |
544 | return -EINVAL; | |
545 | ||
57773204 MD |
546 | return -ENOSYS; |
547 | } | |
548 | ||
f1fffc57 MD |
549 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
550 | { | |
551 | struct ustcomm_ust_msg lum; | |
552 | struct ustcomm_ust_reply lur; | |
553 | int ret; | |
554 | ||
9bfc503d MD |
555 | if (!object) |
556 | return -EINVAL; | |
557 | ||
f1fffc57 MD |
558 | memset(&lum, 0, sizeof(lum)); |
559 | lum.handle = object->handle; | |
560 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
561 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
562 | if (ret) | |
563 | return ret; | |
564 | DBG("flushed buffer handle %u", object->handle); | |
565 | return 0; | |
566 | } | |
567 | ||
74d81a6c MD |
568 | static |
569 | int ustctl_send_channel(int sock, | |
570 | enum lttng_ust_chan_type type, | |
571 | void *data, | |
572 | uint64_t size, | |
ff0f5728 | 573 | int wakeup_fd, |
74d81a6c MD |
574 | int send_fd_only) |
575 | { | |
576 | ssize_t len; | |
577 | ||
578 | if (!send_fd_only) { | |
579 | /* Send mmap size */ | |
580 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
581 | if (len != sizeof(size)) { | |
582 | if (len < 0) | |
583 | return len; | |
584 | else | |
585 | return -EIO; | |
586 | } | |
587 | ||
588 | /* Send channel type */ | |
589 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
590 | if (len != sizeof(type)) { | |
591 | if (len < 0) | |
592 | return len; | |
593 | else | |
594 | return -EIO; | |
595 | } | |
596 | } | |
597 | ||
598 | /* Send channel data */ | |
599 | len = ustcomm_send_unix_sock(sock, data, size); | |
600 | if (len != size) { | |
601 | if (len < 0) | |
602 | return len; | |
603 | else | |
604 | return -EIO; | |
605 | } | |
57773204 | 606 | |
ff0f5728 MD |
607 | /* Send wakeup fd */ |
608 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
609 | if (len <= 0) { | |
610 | if (len < 0) | |
611 | return len; | |
612 | else | |
613 | return -EIO; | |
614 | } | |
74d81a6c MD |
615 | return 0; |
616 | } | |
617 | ||
618 | static | |
619 | int ustctl_send_stream(int sock, | |
620 | uint32_t stream_nr, | |
621 | uint64_t memory_map_size, | |
622 | int shm_fd, int wakeup_fd, | |
623 | int send_fd_only) | |
57773204 | 624 | { |
74d81a6c MD |
625 | ssize_t len; |
626 | int fds[2]; | |
627 | ||
628 | if (!send_fd_only) { | |
629 | if (shm_fd < 0) { | |
630 | /* finish iteration */ | |
631 | uint64_t v = -1; | |
632 | ||
633 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
634 | if (len != sizeof(v)) { | |
635 | if (len < 0) | |
636 | return len; | |
637 | else | |
638 | return -EIO; | |
639 | } | |
640 | return 0; | |
641 | } | |
642 | ||
643 | /* Send mmap size */ | |
644 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
645 | sizeof(memory_map_size)); | |
646 | if (len != sizeof(memory_map_size)) { | |
647 | if (len < 0) | |
648 | return len; | |
649 | else | |
650 | return -EIO; | |
651 | } | |
652 | ||
653 | /* Send stream nr */ | |
654 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
655 | sizeof(stream_nr)); | |
656 | if (len != sizeof(stream_nr)) { | |
657 | if (len < 0) | |
658 | return len; | |
659 | else | |
660 | return -EIO; | |
661 | } | |
662 | } | |
663 | ||
664 | /* Send shm fd and wakeup fd */ | |
665 | fds[0] = shm_fd; | |
666 | fds[1] = wakeup_fd; | |
667 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
668 | if (len <= 0) { | |
669 | if (len < 0) | |
670 | return len; | |
671 | else | |
672 | return -EIO; | |
673 | } | |
674 | return 0; | |
675 | } | |
676 | ||
677 | int ustctl_recv_channel_from_consumer(int sock, | |
678 | struct lttng_ust_object_data **_channel_data) | |
679 | { | |
680 | struct lttng_ust_object_data *channel_data; | |
681 | ssize_t len; | |
ff0f5728 | 682 | int wakeup_fd; |
7a784989 | 683 | int ret; |
57773204 | 684 | |
74d81a6c MD |
685 | channel_data = zmalloc(sizeof(*channel_data)); |
686 | if (!channel_data) { | |
687 | ret = -ENOMEM; | |
688 | goto error_alloc; | |
689 | } | |
690 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
12f3dabc | 691 | channel_data->handle = -1; |
74d81a6c MD |
692 | |
693 | /* recv mmap size */ | |
694 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
695 | sizeof(channel_data->size)); | |
696 | if (len != sizeof(channel_data->size)) { | |
697 | if (len < 0) | |
698 | ret = len; | |
699 | else | |
700 | ret = -EINVAL; | |
701 | goto error; | |
702 | } | |
9bfc503d | 703 | |
74d81a6c MD |
704 | /* recv channel type */ |
705 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
706 | sizeof(channel_data->u.channel.type)); | |
707 | if (len != sizeof(channel_data->u.channel.type)) { | |
708 | if (len < 0) | |
709 | ret = len; | |
710 | else | |
711 | ret = -EINVAL; | |
712 | goto error; | |
713 | } | |
714 | ||
715 | /* recv channel data */ | |
716 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
717 | if (!channel_data->u.channel.data) { | |
718 | ret = -ENOMEM; | |
719 | goto error; | |
720 | } | |
721 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
722 | channel_data->size); | |
723 | if (len != channel_data->size) { | |
724 | if (len < 0) | |
725 | ret = len; | |
726 | else | |
727 | ret = -EINVAL; | |
728 | goto error_recv_data; | |
729 | } | |
ff0f5728 MD |
730 | /* recv wakeup fd */ |
731 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
732 | if (len <= 0) { | |
733 | if (len < 0) { | |
734 | ret = len; | |
735 | goto error_recv_data; | |
736 | } else { | |
737 | ret = -EIO; | |
738 | goto error_recv_data; | |
739 | } | |
740 | } | |
741 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
742 | *_channel_data = channel_data; |
743 | return 0; | |
744 | ||
745 | error_recv_data: | |
746 | free(channel_data->u.channel.data); | |
747 | error: | |
748 | free(channel_data); | |
749 | error_alloc: | |
750 | return ret; | |
751 | } | |
752 | ||
753 | int ustctl_recv_stream_from_consumer(int sock, | |
754 | struct lttng_ust_object_data **_stream_data) | |
755 | { | |
756 | struct lttng_ust_object_data *stream_data; | |
757 | ssize_t len; | |
758 | int ret; | |
759 | int fds[2]; | |
760 | ||
761 | stream_data = zmalloc(sizeof(*stream_data)); | |
762 | if (!stream_data) { | |
763 | ret = -ENOMEM; | |
764 | goto error_alloc; | |
57773204 | 765 | } |
74d81a6c MD |
766 | |
767 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
768 | stream_data->handle = -1; | |
769 | ||
770 | /* recv mmap size */ | |
771 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
772 | sizeof(stream_data->size)); | |
773 | if (len != sizeof(stream_data->size)) { | |
774 | if (len < 0) | |
775 | ret = len; | |
776 | else | |
777 | ret = -EINVAL; | |
778 | goto error; | |
779 | } | |
780 | if (stream_data->size == -1) { | |
781 | ret = -LTTNG_UST_ERR_NOENT; | |
782 | goto error; | |
783 | } | |
784 | ||
785 | /* recv stream nr */ | |
786 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
787 | sizeof(stream_data->u.stream.stream_nr)); | |
788 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
789 | if (len < 0) | |
790 | ret = len; | |
791 | else | |
792 | ret = -EINVAL; | |
793 | goto error; | |
794 | } | |
795 | ||
796 | /* recv shm fd and wakeup fd */ | |
797 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
798 | if (len <= 0) { | |
799 | if (len < 0) { | |
800 | ret = len; | |
801 | goto error; | |
802 | } else { | |
803 | ret = -EIO; | |
804 | goto error; | |
0bfe09ec | 805 | } |
0bfe09ec | 806 | } |
74d81a6c MD |
807 | stream_data->u.stream.shm_fd = fds[0]; |
808 | stream_data->u.stream.wakeup_fd = fds[1]; | |
809 | *_stream_data = stream_data; | |
810 | return 0; | |
0bfe09ec | 811 | |
74d81a6c MD |
812 | error: |
813 | free(stream_data); | |
814 | error_alloc: | |
815 | return ret; | |
816 | } | |
817 | ||
818 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
819 | struct lttng_ust_object_data *channel_data) | |
820 | { | |
821 | struct ustcomm_ust_msg lum; | |
822 | struct ustcomm_ust_reply lur; | |
823 | int ret; | |
824 | ||
825 | if (!channel_data) | |
826 | return -EINVAL; | |
827 | ||
828 | memset(&lum, 0, sizeof(lum)); | |
829 | lum.handle = session_handle; | |
830 | lum.cmd = LTTNG_UST_CHANNEL; | |
831 | lum.u.channel.len = channel_data->size; | |
832 | lum.u.channel.type = channel_data->u.channel.type; | |
833 | ret = ustcomm_send_app_msg(sock, &lum); | |
834 | if (ret) | |
835 | return ret; | |
836 | ||
837 | ret = ustctl_send_channel(sock, | |
838 | channel_data->u.channel.type, | |
839 | channel_data->u.channel.data, | |
840 | channel_data->size, | |
ff0f5728 | 841 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
842 | 1); |
843 | if (ret) | |
844 | return ret; | |
845 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
846 | if (!ret) { | |
7f2348b8 | 847 | channel_data->handle = lur.ret_val; |
57773204 | 848 | } |
74d81a6c MD |
849 | return ret; |
850 | } | |
851 | ||
852 | int ustctl_send_stream_to_ust(int sock, | |
853 | struct lttng_ust_object_data *channel_data, | |
854 | struct lttng_ust_object_data *stream_data) | |
855 | { | |
856 | struct ustcomm_ust_msg lum; | |
857 | struct ustcomm_ust_reply lur; | |
858 | int ret; | |
859 | ||
860 | memset(&lum, 0, sizeof(lum)); | |
861 | lum.handle = channel_data->handle; | |
862 | lum.cmd = LTTNG_UST_STREAM; | |
863 | lum.u.stream.len = stream_data->size; | |
864 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
865 | ret = ustcomm_send_app_msg(sock, &lum); | |
866 | if (ret) | |
867 | return ret; | |
868 | ||
869 | assert(stream_data); | |
870 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
871 | ||
872 | ret = ustctl_send_stream(sock, | |
873 | stream_data->u.stream.stream_nr, | |
874 | stream_data->size, | |
875 | stream_data->u.stream.shm_fd, | |
876 | stream_data->u.stream.wakeup_fd, 1); | |
877 | if (ret) | |
878 | return ret; | |
879 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
880 | } | |
881 | ||
12f3dabc MD |
882 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, |
883 | struct lttng_ust_object_data *src) | |
884 | { | |
885 | struct lttng_ust_object_data *obj; | |
886 | int ret; | |
887 | ||
888 | if (src->handle != -1) { | |
889 | ret = -EINVAL; | |
890 | goto error; | |
891 | } | |
892 | ||
893 | obj = zmalloc(sizeof(*obj)); | |
894 | if (!obj) { | |
895 | ret = -ENOMEM; | |
896 | goto error; | |
897 | } | |
898 | ||
899 | obj->type = src->type; | |
900 | obj->handle = src->handle; | |
901 | obj->size = src->size; | |
902 | ||
903 | switch (obj->type) { | |
904 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
905 | { | |
906 | obj->u.channel.type = src->u.channel.type; | |
907 | if (src->u.channel.wakeup_fd >= 0) { | |
908 | obj->u.channel.wakeup_fd = | |
909 | dup(src->u.channel.wakeup_fd); | |
910 | if (obj->u.channel.wakeup_fd < 0) { | |
911 | ret = errno; | |
912 | goto chan_error_wakeup_fd; | |
913 | } | |
914 | } else { | |
915 | obj->u.channel.wakeup_fd = | |
916 | src->u.channel.wakeup_fd; | |
917 | } | |
918 | obj->u.channel.data = zmalloc(obj->size); | |
919 | if (!obj->u.channel.data) { | |
920 | ret = -ENOMEM; | |
921 | goto chan_error_alloc; | |
922 | } | |
923 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
924 | break; | |
925 | ||
926 | chan_error_alloc: | |
927 | if (src->u.channel.wakeup_fd >= 0) { | |
928 | int closeret; | |
929 | ||
930 | closeret = close(obj->u.channel.wakeup_fd); | |
931 | if (closeret) { | |
932 | PERROR("close"); | |
933 | } | |
934 | } | |
935 | chan_error_wakeup_fd: | |
936 | goto error_type; | |
937 | ||
938 | } | |
939 | ||
940 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
941 | { | |
942 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
943 | if (src->u.stream.wakeup_fd >= 0) { | |
944 | obj->u.stream.wakeup_fd = | |
945 | dup(src->u.stream.wakeup_fd); | |
946 | if (obj->u.stream.wakeup_fd < 0) { | |
947 | ret = errno; | |
948 | goto stream_error_wakeup_fd; | |
949 | } | |
950 | } else { | |
951 | obj->u.stream.wakeup_fd = | |
952 | src->u.stream.wakeup_fd; | |
953 | } | |
954 | ||
955 | if (src->u.stream.shm_fd >= 0) { | |
956 | obj->u.stream.shm_fd = | |
957 | dup(src->u.stream.shm_fd); | |
958 | if (obj->u.stream.shm_fd < 0) { | |
959 | ret = errno; | |
960 | goto stream_error_shm_fd; | |
961 | } | |
962 | } else { | |
963 | obj->u.stream.shm_fd = | |
964 | src->u.stream.shm_fd; | |
965 | } | |
966 | break; | |
967 | ||
968 | stream_error_shm_fd: | |
969 | if (src->u.stream.wakeup_fd >= 0) { | |
970 | int closeret; | |
971 | ||
972 | closeret = close(obj->u.stream.wakeup_fd); | |
973 | if (closeret) { | |
974 | PERROR("close"); | |
975 | } | |
976 | } | |
977 | stream_error_wakeup_fd: | |
978 | goto error_type; | |
979 | } | |
980 | ||
981 | default: | |
982 | ret = -EINVAL; | |
983 | goto error_type; | |
984 | } | |
985 | ||
986 | *dest = obj; | |
987 | return 0; | |
988 | ||
989 | error_type: | |
990 | free(obj); | |
991 | error: | |
992 | return ret; | |
993 | } | |
994 | ||
74d81a6c MD |
995 | |
996 | /* Buffer operations */ | |
997 | ||
5ea386c3 MD |
998 | int ustctl_get_nr_stream_per_channel(void) |
999 | { | |
1000 | return num_possible_cpus(); | |
1001 | } | |
1002 | ||
74d81a6c | 1003 | struct ustctl_consumer_channel * |
5ea386c3 MD |
1004 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr, |
1005 | const int *stream_fds, int nr_stream_fds) | |
74d81a6c MD |
1006 | { |
1007 | struct ustctl_consumer_channel *chan; | |
1008 | const char *transport_name; | |
1009 | struct lttng_transport *transport; | |
1010 | ||
1011 | switch (attr->type) { | |
1012 | case LTTNG_UST_CHAN_PER_CPU: | |
1013 | if (attr->output == LTTNG_UST_MMAP) { | |
34a91bdb MD |
1014 | if (attr->overwrite) { |
1015 | if (attr->read_timer_interval == 0) { | |
1016 | transport_name = "relay-overwrite-mmap"; | |
1017 | } else { | |
1018 | transport_name = "relay-overwrite-rt-mmap"; | |
1019 | } | |
1020 | } else { | |
1021 | if (attr->read_timer_interval == 0) { | |
1022 | transport_name = "relay-discard-mmap"; | |
1023 | } else { | |
1024 | transport_name = "relay-discard-rt-mmap"; | |
1025 | } | |
1026 | } | |
74d81a6c MD |
1027 | } else { |
1028 | return NULL; | |
1029 | } | |
c1fca457 | 1030 | break; |
74d81a6c MD |
1031 | case LTTNG_UST_CHAN_METADATA: |
1032 | if (attr->output == LTTNG_UST_MMAP) | |
1033 | transport_name = "relay-metadata-mmap"; | |
1034 | else | |
1035 | return NULL; | |
c1fca457 MD |
1036 | break; |
1037 | default: | |
74d81a6c | 1038 | transport_name = "<unknown>"; |
c1fca457 MD |
1039 | return NULL; |
1040 | } | |
74d81a6c MD |
1041 | |
1042 | transport = lttng_transport_find(transport_name); | |
1043 | if (!transport) { | |
1044 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 1045 | transport_name); |
74d81a6c | 1046 | return NULL; |
7a784989 | 1047 | } |
74d81a6c MD |
1048 | |
1049 | chan = zmalloc(sizeof(*chan)); | |
1050 | if (!chan) | |
1051 | return NULL; | |
1052 | ||
1053 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 1054 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 1055 | attr->switch_timer_interval, |
32ce8569 | 1056 | attr->read_timer_interval, |
a9ff648c | 1057 | attr->uuid, attr->chan_id, |
b2c5f61a MD |
1058 | stream_fds, nr_stream_fds, |
1059 | attr->blocking_timeout); | |
74d81a6c MD |
1060 | if (!chan->chan) { |
1061 | goto chan_error; | |
1062 | } | |
1063 | chan->chan->ops = &transport->ops; | |
1064 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
cb7378b3 MD |
1065 | chan->wait_fd = ustctl_channel_get_wait_fd(chan); |
1066 | chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
1067 | return chan; |
1068 | ||
1069 | chan_error: | |
1070 | free(chan); | |
1071 | return NULL; | |
57773204 MD |
1072 | } |
1073 | ||
74d81a6c | 1074 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 1075 | { |
b24e4e91 MD |
1076 | (void) ustctl_channel_close_wait_fd(chan); |
1077 | (void) ustctl_channel_close_wakeup_fd(chan); | |
74d81a6c MD |
1078 | chan->chan->ops->channel_destroy(chan->chan); |
1079 | free(chan); | |
1080 | } | |
1081 | ||
1082 | int ustctl_send_channel_to_sessiond(int sock, | |
1083 | struct ustctl_consumer_channel *channel) | |
1084 | { | |
1085 | struct shm_object_table *table; | |
57773204 | 1086 | |
74d81a6c MD |
1087 | table = channel->chan->handle->table; |
1088 | if (table->size <= 0) | |
9bfc503d | 1089 | return -EINVAL; |
74d81a6c MD |
1090 | return ustctl_send_channel(sock, |
1091 | channel->attr.type, | |
1092 | table->objects[0].memory_map, | |
1093 | table->objects[0].memory_map_size, | |
ff0f5728 | 1094 | channel->wakeup_fd, |
74d81a6c MD |
1095 | 0); |
1096 | } | |
9bfc503d | 1097 | |
74d81a6c MD |
1098 | int ustctl_send_stream_to_sessiond(int sock, |
1099 | struct ustctl_consumer_stream *stream) | |
1100 | { | |
1101 | if (!stream) | |
1102 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
1103 | ||
1104 | return ustctl_send_stream(sock, | |
1105 | stream->cpu, | |
1106 | stream->memory_map_size, | |
1107 | stream->shm_fd, stream->wakeup_fd, | |
1108 | 0); | |
57773204 MD |
1109 | } |
1110 | ||
c9023c93 MD |
1111 | int ustctl_write_metadata_to_channel( |
1112 | struct ustctl_consumer_channel *channel, | |
1113 | const char *metadata_str, /* NOT null-terminated */ | |
1114 | size_t len) /* metadata length */ | |
1115 | { | |
1116 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1117 | struct lttng_channel *chan = channel->chan; | |
1118 | const char *str = metadata_str; | |
1119 | int ret = 0, waitret; | |
1120 | size_t reserve_len, pos; | |
1121 | ||
1122 | for (pos = 0; pos < len; pos += reserve_len) { | |
1123 | reserve_len = min_t(size_t, | |
1124 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1125 | len - pos); | |
1126 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1127 | sizeof(char), -1, chan->handle, NULL); |
c9023c93 MD |
1128 | /* |
1129 | * We don't care about metadata buffer's records lost | |
1130 | * count, because we always retry here. Report error if | |
1131 | * we need to bail out after timeout or being | |
1132 | * interrupted. | |
1133 | */ | |
1134 | waitret = wait_cond_interruptible_timeout( | |
1135 | ({ | |
1136 | ret = chan->ops->event_reserve(&ctx, 0); | |
1137 | ret != -ENOBUFS || !ret; | |
1138 | }), | |
1139 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1140 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1141 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1142 | waitret == -EINTR ? "interrupted" : | |
1143 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1144 | if (waitret == -EINTR) | |
1145 | ret = waitret; | |
1146 | goto end; | |
1147 | } | |
1148 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
1149 | chan->ops->event_commit(&ctx); | |
1150 | } | |
1151 | end: | |
1152 | return ret; | |
1153 | } | |
1154 | ||
3ef94b0e JD |
1155 | /* |
1156 | * Write at most one packet in the channel. | |
1157 | * Returns the number of bytes written on success, < 0 on error. | |
1158 | */ | |
1159 | ssize_t ustctl_write_one_packet_to_channel( | |
1160 | struct ustctl_consumer_channel *channel, | |
1161 | const char *metadata_str, /* NOT null-terminated */ | |
1162 | size_t len) /* metadata length */ | |
1163 | { | |
1164 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1165 | struct lttng_channel *chan = channel->chan; | |
1166 | const char *str = metadata_str; | |
1167 | ssize_t reserve_len; | |
1168 | int ret; | |
1169 | ||
1170 | reserve_len = min_t(ssize_t, | |
1171 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1172 | len); | |
1173 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1174 | sizeof(char), -1, chan->handle, NULL); |
3ef94b0e JD |
1175 | ret = chan->ops->event_reserve(&ctx, 0); |
1176 | if (ret != 0) { | |
1177 | DBG("LTTng: event reservation failed"); | |
1178 | assert(ret < 0); | |
1179 | reserve_len = ret; | |
1180 | goto end; | |
1181 | } | |
1182 | chan->ops->event_write(&ctx, str, reserve_len); | |
1183 | chan->ops->event_commit(&ctx); | |
1184 | ||
1185 | end: | |
1186 | return reserve_len; | |
1187 | } | |
1188 | ||
ff0f5728 MD |
1189 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan) |
1190 | { | |
1191 | struct channel *chan; | |
cb7378b3 | 1192 | int ret; |
ff0f5728 MD |
1193 | |
1194 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1195 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
ff0f5728 | 1196 | chan, chan->handle); |
cb7378b3 MD |
1197 | if (!ret) |
1198 | consumer_chan->wait_fd = -1; | |
1199 | return ret; | |
ff0f5728 MD |
1200 | } |
1201 | ||
1202 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan) | |
1203 | { | |
1204 | struct channel *chan; | |
cb7378b3 | 1205 | int ret; |
ff0f5728 MD |
1206 | |
1207 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1208 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1209 | chan, chan->handle); |
cb7378b3 MD |
1210 | if (!ret) |
1211 | consumer_chan->wakeup_fd = -1; | |
1212 | return ret; | |
ff0f5728 MD |
1213 | } |
1214 | ||
74d81a6c | 1215 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
1216 | { |
1217 | struct channel *chan; | |
1218 | ||
74d81a6c | 1219 | chan = stream->chan->chan->chan; |
ff0f5728 | 1220 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
74d81a6c | 1221 | chan, stream->handle, stream->cpu); |
5224b5c8 MD |
1222 | } |
1223 | ||
74d81a6c | 1224 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 1225 | { |
66bdd22a | 1226 | struct channel *chan; |
74d81a6c MD |
1227 | |
1228 | chan = stream->chan->chan->chan; | |
ff0f5728 | 1229 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
74d81a6c MD |
1230 | chan, stream->handle, stream->cpu); |
1231 | } | |
1232 | ||
1233 | struct ustctl_consumer_stream * | |
1234 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
1235 | int cpu) | |
1236 | { | |
1237 | struct ustctl_consumer_stream *stream; | |
1238 | struct lttng_ust_shm_handle *handle; | |
1239 | struct channel *chan; | |
1240 | int shm_fd, wait_fd, wakeup_fd; | |
1241 | uint64_t memory_map_size; | |
4cfec15c | 1242 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
1243 | int ret; |
1244 | ||
74d81a6c MD |
1245 | if (!channel) |
1246 | return NULL; | |
1247 | handle = channel->chan->handle; | |
9bfc503d MD |
1248 | if (!handle) |
1249 | return NULL; | |
1250 | ||
74d81a6c | 1251 | chan = channel->chan->chan; |
6e922b24 | 1252 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
1253 | chan, cpu, handle, &shm_fd, &wait_fd, |
1254 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
1255 | if (!buf) |
1256 | return NULL; | |
74d81a6c | 1257 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1258 | if (ret) |
1259 | return NULL; | |
74d81a6c MD |
1260 | |
1261 | stream = zmalloc(sizeof(*stream)); | |
1262 | if (!stream) | |
1263 | goto alloc_error; | |
1264 | stream->handle = handle; | |
1265 | stream->buf = buf; | |
1266 | stream->chan = channel; | |
1267 | stream->shm_fd = shm_fd; | |
1268 | stream->wait_fd = wait_fd; | |
1269 | stream->wakeup_fd = wakeup_fd; | |
1270 | stream->memory_map_size = memory_map_size; | |
1271 | stream->cpu = cpu; | |
1272 | return stream; | |
1273 | ||
1274 | alloc_error: | |
1275 | return NULL; | |
1276 | } | |
1277 | ||
1278 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
1279 | { | |
1280 | struct lttng_ust_lib_ring_buffer *buf; | |
1281 | struct ustctl_consumer_channel *consumer_chan; | |
1282 | ||
1283 | assert(stream); | |
1284 | buf = stream->buf; | |
1285 | consumer_chan = stream->chan; | |
b24e4e91 MD |
1286 | (void) ustctl_stream_close_wait_fd(stream); |
1287 | (void) ustctl_stream_close_wakeup_fd(stream); | |
74d81a6c MD |
1288 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); |
1289 | free(stream); | |
6e922b24 MD |
1290 | } |
1291 | ||
ff0f5728 MD |
1292 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan) |
1293 | { | |
1294 | if (!chan) | |
1295 | return -EINVAL; | |
1296 | return shm_get_wait_fd(chan->chan->handle, | |
1297 | &chan->chan->handle->chan._ref); | |
1298 | } | |
1299 | ||
1300 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan) | |
1301 | { | |
1302 | if (!chan) | |
1303 | return -EINVAL; | |
1304 | return shm_get_wakeup_fd(chan->chan->handle, | |
1305 | &chan->chan->handle->chan._ref); | |
1306 | } | |
1307 | ||
1308 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream) | |
6e922b24 | 1309 | { |
74d81a6c MD |
1310 | struct lttng_ust_lib_ring_buffer *buf; |
1311 | struct ustctl_consumer_channel *consumer_chan; | |
1312 | ||
1313 | if (!stream) | |
1314 | return -EINVAL; | |
1315 | buf = stream->buf; | |
1316 | consumer_chan = stream->chan; | |
1317 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
1318 | } | |
1319 | ||
ff0f5728 | 1320 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
74d81a6c MD |
1321 | { |
1322 | struct lttng_ust_lib_ring_buffer *buf; | |
1323 | struct ustctl_consumer_channel *consumer_chan; | |
1324 | ||
1325 | if (!stream) | |
1326 | return -EINVAL; | |
1327 | buf = stream->buf; | |
1328 | consumer_chan = stream->chan; | |
1329 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
1330 | } |
1331 | ||
57773204 MD |
1332 | /* For mmap mode, readable without "get" operation */ |
1333 | ||
74d81a6c | 1334 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 1335 | { |
74d81a6c MD |
1336 | struct lttng_ust_lib_ring_buffer *buf; |
1337 | struct ustctl_consumer_channel *consumer_chan; | |
1338 | ||
1339 | if (!stream) | |
9bfc503d | 1340 | return NULL; |
74d81a6c MD |
1341 | buf = stream->buf; |
1342 | consumer_chan = stream->chan; | |
1343 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1344 | } |
1345 | ||
57773204 | 1346 | /* returns the length to mmap. */ |
74d81a6c | 1347 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1348 | unsigned long *len) |
1349 | { | |
74d81a6c | 1350 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1351 | unsigned long mmap_buf_len; |
66bdd22a | 1352 | struct channel *chan; |
57773204 | 1353 | |
74d81a6c | 1354 | if (!stream) |
9bfc503d | 1355 | return -EINVAL; |
74d81a6c MD |
1356 | consumer_chan = stream->chan; |
1357 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1358 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1359 | return -EINVAL; | |
1360 | mmap_buf_len = chan->backend.buf_size; | |
1361 | if (chan->backend.extra_reader_sb) | |
1362 | mmap_buf_len += chan->backend.subbuf_size; | |
1363 | if (mmap_buf_len > INT_MAX) | |
1364 | return -EFBIG; | |
1365 | *len = mmap_buf_len; | |
1366 | return 0; | |
1367 | } | |
1368 | ||
1369 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1370 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1371 | unsigned long *len) |
1372 | { | |
74d81a6c | 1373 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1374 | struct channel *chan; |
57773204 | 1375 | |
74d81a6c | 1376 | if (!stream) |
9bfc503d | 1377 | return -EINVAL; |
74d81a6c MD |
1378 | consumer_chan = stream->chan; |
1379 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1380 | *len = chan->backend.subbuf_size; |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | /* | |
1385 | * For mmap mode, operate on the current packet (between get/put or | |
1386 | * get_next/put_next). | |
1387 | */ | |
1388 | ||
1389 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1390 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1391 | unsigned long *off) | |
57773204 | 1392 | { |
66bdd22a | 1393 | struct channel *chan; |
57773204 | 1394 | unsigned long sb_bindex; |
74d81a6c MD |
1395 | struct lttng_ust_lib_ring_buffer *buf; |
1396 | struct ustctl_consumer_channel *consumer_chan; | |
34daae3e MD |
1397 | struct lttng_ust_lib_ring_buffer_backend_pages_shmp *barray_idx; |
1398 | struct lttng_ust_lib_ring_buffer_backend_pages *pages; | |
57773204 | 1399 | |
74d81a6c | 1400 | if (!stream) |
9bfc503d | 1401 | return -EINVAL; |
74d81a6c MD |
1402 | buf = stream->buf; |
1403 | consumer_chan = stream->chan; | |
1404 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1405 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1406 | return -EINVAL; | |
1407 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1408 | buf->backend.buf_rsb.id); |
34daae3e MD |
1409 | barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array, |
1410 | sb_bindex); | |
1411 | if (!barray_idx) | |
1412 | return -EINVAL; | |
1413 | pages = shmp(consumer_chan->chan->handle, barray_idx->shmp); | |
1414 | if (!pages) | |
1415 | return -EINVAL; | |
1416 | *off = pages->mmap_offset; | |
57773204 MD |
1417 | return 0; |
1418 | } | |
1419 | ||
1420 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1421 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1422 | unsigned long *len) | |
57773204 | 1423 | { |
74d81a6c | 1424 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1425 | struct channel *chan; |
74d81a6c | 1426 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1427 | |
74d81a6c | 1428 | if (!stream) |
9bfc503d MD |
1429 | return -EINVAL; |
1430 | ||
74d81a6c MD |
1431 | buf = stream->buf; |
1432 | consumer_chan = stream->chan; | |
1433 | chan = consumer_chan->chan->chan; | |
57773204 | 1434 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1435 | consumer_chan->chan->handle); |
57773204 MD |
1436 | return 0; |
1437 | } | |
1438 | ||
1439 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1440 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1441 | unsigned long *len) | |
57773204 | 1442 | { |
74d81a6c | 1443 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1444 | struct channel *chan; |
74d81a6c | 1445 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1446 | |
74d81a6c | 1447 | if (!stream) |
9bfc503d | 1448 | return -EINVAL; |
74d81a6c MD |
1449 | buf = stream->buf; |
1450 | consumer_chan = stream->chan; | |
1451 | chan = consumer_chan->chan->chan; | |
57773204 | 1452 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1453 | consumer_chan->chan->handle); |
57773204 MD |
1454 | *len = PAGE_ALIGN(*len); |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1459 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1460 | { |
74d81a6c MD |
1461 | struct lttng_ust_lib_ring_buffer *buf; |
1462 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1463 | |
74d81a6c MD |
1464 | if (!stream) |
1465 | return -EINVAL; | |
1466 | buf = stream->buf; | |
1467 | consumer_chan = stream->chan; | |
1468 | return lib_ring_buffer_get_next_subbuf(buf, | |
1469 | consumer_chan->chan->handle); | |
57773204 MD |
1470 | } |
1471 | ||
1472 | ||
1473 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1474 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1475 | { |
74d81a6c MD |
1476 | struct lttng_ust_lib_ring_buffer *buf; |
1477 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1478 | |
74d81a6c MD |
1479 | if (!stream) |
1480 | return -EINVAL; | |
1481 | buf = stream->buf; | |
1482 | consumer_chan = stream->chan; | |
1483 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1484 | return 0; |
1485 | } | |
1486 | ||
1487 | /* snapshot */ | |
1488 | ||
1489 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1490 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1491 | { |
74d81a6c MD |
1492 | struct lttng_ust_lib_ring_buffer *buf; |
1493 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1494 | |
74d81a6c MD |
1495 | if (!stream) |
1496 | return -EINVAL; | |
1497 | buf = stream->buf; | |
1498 | consumer_chan = stream->chan; | |
57773204 | 1499 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1500 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1501 | } |
1502 | ||
f45930b7 JG |
1503 | /* |
1504 | * Get a snapshot of the current ring buffer producer and consumer positions | |
1505 | * even if the consumed and produced positions are contained within the same | |
1506 | * subbuffer. | |
1507 | */ | |
1508 | int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream) | |
1509 | { | |
1510 | struct lttng_ust_lib_ring_buffer *buf; | |
1511 | struct ustctl_consumer_channel *consumer_chan; | |
1512 | ||
1513 | if (!stream) | |
1514 | return -EINVAL; | |
1515 | buf = stream->buf; | |
1516 | consumer_chan = stream->chan; | |
1517 | return lib_ring_buffer_snapshot_sample_positions(buf, | |
1518 | &buf->cons_snapshot, &buf->prod_snapshot, | |
1519 | consumer_chan->chan->handle); | |
1520 | } | |
1521 | ||
57773204 | 1522 | /* Get the consumer position (iteration start) */ |
74d81a6c MD |
1523 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1524 | unsigned long *pos) | |
57773204 | 1525 | { |
74d81a6c | 1526 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1527 | |
74d81a6c MD |
1528 | if (!stream) |
1529 | return -EINVAL; | |
1530 | buf = stream->buf; | |
57773204 MD |
1531 | *pos = buf->cons_snapshot; |
1532 | return 0; | |
1533 | } | |
1534 | ||
1535 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1536 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1537 | unsigned long *pos) | |
57773204 | 1538 | { |
74d81a6c | 1539 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1540 | |
74d81a6c MD |
1541 | if (!stream) |
1542 | return -EINVAL; | |
1543 | buf = stream->buf; | |
57773204 MD |
1544 | *pos = buf->prod_snapshot; |
1545 | return 0; | |
1546 | } | |
1547 | ||
1548 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1549 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1550 | unsigned long *pos) | |
57773204 | 1551 | { |
74d81a6c MD |
1552 | struct lttng_ust_lib_ring_buffer *buf; |
1553 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1554 | |
74d81a6c MD |
1555 | if (!stream) |
1556 | return -EINVAL; | |
1557 | buf = stream->buf; | |
1558 | consumer_chan = stream->chan; | |
1559 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1560 | consumer_chan->chan->handle); | |
57773204 MD |
1561 | } |
1562 | ||
1563 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1564 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1565 | { |
74d81a6c MD |
1566 | struct lttng_ust_lib_ring_buffer *buf; |
1567 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1568 | |
74d81a6c MD |
1569 | if (!stream) |
1570 | return -EINVAL; | |
1571 | buf = stream->buf; | |
1572 | consumer_chan = stream->chan; | |
1573 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1574 | return 0; |
1575 | } | |
1576 | ||
74d81a6c | 1577 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1578 | int producer_active) |
57773204 | 1579 | { |
74d81a6c MD |
1580 | struct lttng_ust_lib_ring_buffer *buf; |
1581 | struct ustctl_consumer_channel *consumer_chan; | |
1582 | ||
1583 | assert(stream); | |
1584 | buf = stream->buf; | |
1585 | consumer_chan = stream->chan; | |
b52190f2 MD |
1586 | lib_ring_buffer_switch_slow(buf, |
1587 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1588 | consumer_chan->chan->handle); |
1589 | } | |
1590 | ||
beca55a1 MD |
1591 | void ustctl_clear_buffer(struct ustctl_consumer_stream *stream) |
1592 | { | |
1593 | struct lttng_ust_lib_ring_buffer *buf; | |
1594 | struct ustctl_consumer_channel *consumer_chan; | |
1595 | ||
1596 | assert(stream); | |
1597 | buf = stream->buf; | |
1598 | consumer_chan = stream->chan; | |
1599 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, | |
1600 | consumer_chan->chan->handle); | |
1601 | lib_ring_buffer_clear_reader(buf, consumer_chan->chan->handle); | |
1602 | } | |
1603 | ||
b2f3252a JD |
1604 | static |
1605 | struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb( | |
1606 | struct lttng_ust_lib_ring_buffer *buf, | |
1607 | struct lttng_ust_shm_handle *handle) | |
1608 | { | |
1609 | struct channel *chan; | |
1610 | const struct lttng_ust_lib_ring_buffer_config *config; | |
1611 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1612 | ||
1613 | chan = shmp(handle, buf->backend.chan); | |
34daae3e MD |
1614 | if (!chan) |
1615 | return NULL; | |
b2f3252a JD |
1616 | config = &chan->backend.config; |
1617 | if (!config->cb_ptr) | |
1618 | return NULL; | |
1619 | client_cb = caa_container_of(config->cb_ptr, | |
1620 | struct lttng_ust_client_lib_ring_buffer_client_cb, | |
1621 | parent); | |
1622 | return client_cb; | |
1623 | } | |
1624 | ||
1625 | int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream, | |
1626 | uint64_t *timestamp_begin) | |
1627 | { | |
1628 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1629 | struct lttng_ust_lib_ring_buffer *buf; |
1630 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1631 | |
1632 | if (!stream || !timestamp_begin) | |
1633 | return -EINVAL; | |
e1919a41 MD |
1634 | buf = stream->buf; |
1635 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1636 | client_cb = get_client_cb(buf, handle); |
1637 | if (!client_cb) | |
1638 | return -ENOSYS; | |
1639 | return client_cb->timestamp_begin(buf, handle, timestamp_begin); | |
1640 | } | |
1641 | ||
1642 | int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream, | |
1643 | uint64_t *timestamp_end) | |
1644 | { | |
1645 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1646 | struct lttng_ust_lib_ring_buffer *buf; |
1647 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1648 | |
1649 | if (!stream || !timestamp_end) | |
1650 | return -EINVAL; | |
e1919a41 MD |
1651 | buf = stream->buf; |
1652 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1653 | client_cb = get_client_cb(buf, handle); |
1654 | if (!client_cb) | |
1655 | return -ENOSYS; | |
1656 | return client_cb->timestamp_end(buf, handle, timestamp_end); | |
1657 | } | |
1658 | ||
1659 | int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream, | |
1660 | uint64_t *events_discarded) | |
1661 | { | |
1662 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1663 | struct lttng_ust_lib_ring_buffer *buf; |
1664 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1665 | |
1666 | if (!stream || !events_discarded) | |
1667 | return -EINVAL; | |
e1919a41 MD |
1668 | buf = stream->buf; |
1669 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1670 | client_cb = get_client_cb(buf, handle); |
1671 | if (!client_cb) | |
1672 | return -ENOSYS; | |
1673 | return client_cb->events_discarded(buf, handle, events_discarded); | |
1674 | } | |
1675 | ||
1676 | int ustctl_get_content_size(struct ustctl_consumer_stream *stream, | |
1677 | uint64_t *content_size) | |
1678 | { | |
1679 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1680 | struct lttng_ust_lib_ring_buffer *buf; |
1681 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1682 | |
1683 | if (!stream || !content_size) | |
1684 | return -EINVAL; | |
e1919a41 MD |
1685 | buf = stream->buf; |
1686 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1687 | client_cb = get_client_cb(buf, handle); |
1688 | if (!client_cb) | |
1689 | return -ENOSYS; | |
1690 | return client_cb->content_size(buf, handle, content_size); | |
1691 | } | |
1692 | ||
1693 | int ustctl_get_packet_size(struct ustctl_consumer_stream *stream, | |
1694 | uint64_t *packet_size) | |
1695 | { | |
1696 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1697 | struct lttng_ust_lib_ring_buffer *buf; |
1698 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1699 | |
1700 | if (!stream || !packet_size) | |
1701 | return -EINVAL; | |
e1919a41 MD |
1702 | buf = stream->buf; |
1703 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1704 | client_cb = get_client_cb(buf, handle); |
1705 | if (!client_cb) | |
1706 | return -ENOSYS; | |
1707 | return client_cb->packet_size(buf, handle, packet_size); | |
1708 | } | |
1709 | ||
1710 | int ustctl_get_stream_id(struct ustctl_consumer_stream *stream, | |
1711 | uint64_t *stream_id) | |
1712 | { | |
1713 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1714 | struct lttng_ust_lib_ring_buffer *buf; |
1715 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1716 | |
1717 | if (!stream || !stream_id) | |
1718 | return -EINVAL; | |
e1919a41 MD |
1719 | buf = stream->buf; |
1720 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1721 | client_cb = get_client_cb(buf, handle); |
1722 | if (!client_cb) | |
1723 | return -ENOSYS; | |
1724 | return client_cb->stream_id(buf, handle, stream_id); | |
1725 | } | |
1726 | ||
fca361e8 JD |
1727 | int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream, |
1728 | uint64_t *ts) | |
1729 | { | |
1730 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1731 | struct lttng_ust_lib_ring_buffer *buf; |
1732 | struct lttng_ust_shm_handle *handle; | |
fca361e8 JD |
1733 | |
1734 | if (!stream || !ts) | |
1735 | return -EINVAL; | |
e1919a41 MD |
1736 | buf = stream->buf; |
1737 | handle = stream->chan->chan->handle; | |
fca361e8 JD |
1738 | client_cb = get_client_cb(buf, handle); |
1739 | if (!client_cb || !client_cb->current_timestamp) | |
1740 | return -ENOSYS; | |
1741 | return client_cb->current_timestamp(buf, handle, ts); | |
1742 | } | |
1743 | ||
1ff31389 JD |
1744 | int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream, |
1745 | uint64_t *seq) | |
1746 | { | |
1747 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1748 | struct lttng_ust_lib_ring_buffer *buf; | |
1749 | struct lttng_ust_shm_handle *handle; | |
1750 | ||
1751 | if (!stream || !seq) | |
1752 | return -EINVAL; | |
1753 | buf = stream->buf; | |
1754 | handle = stream->chan->chan->handle; | |
1755 | client_cb = get_client_cb(buf, handle); | |
1756 | if (!client_cb || !client_cb->sequence_number) | |
1757 | return -ENOSYS; | |
1758 | return client_cb->sequence_number(buf, handle, seq); | |
1759 | } | |
1760 | ||
45a00b05 JD |
1761 | int ustctl_get_instance_id(struct ustctl_consumer_stream *stream, |
1762 | uint64_t *id) | |
1763 | { | |
1764 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1765 | struct lttng_ust_lib_ring_buffer *buf; | |
1766 | struct lttng_ust_shm_handle *handle; | |
1767 | ||
1768 | if (!stream || !id) | |
1769 | return -EINVAL; | |
1770 | buf = stream->buf; | |
1771 | handle = stream->chan->chan->handle; | |
1772 | client_cb = get_client_cb(buf, handle); | |
1773 | if (!client_cb) | |
1774 | return -ENOSYS; | |
1775 | return client_cb->instance_id(buf, handle, id); | |
1776 | } | |
1777 | ||
c62a3816 | 1778 | #ifdef LTTNG_UST_HAVE_PERF_EVENT |
57201bb3 MD |
1779 | |
1780 | int ustctl_has_perf_counters(void) | |
1781 | { | |
1782 | return 1; | |
1783 | } | |
1784 | ||
1785 | #else | |
1786 | ||
1787 | int ustctl_has_perf_counters(void) | |
1788 | { | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | #endif | |
1793 | ||
32ce8569 MD |
1794 | /* |
1795 | * Returns 0 on success, negative error value on error. | |
1796 | */ | |
1797 | int ustctl_recv_reg_msg(int sock, | |
1798 | enum ustctl_socket_type *type, | |
1799 | uint32_t *major, | |
1800 | uint32_t *minor, | |
1801 | uint32_t *pid, | |
1802 | uint32_t *ppid, | |
1803 | uint32_t *uid, | |
1804 | uint32_t *gid, | |
1805 | uint32_t *bits_per_long, | |
1806 | uint32_t *uint8_t_alignment, | |
1807 | uint32_t *uint16_t_alignment, | |
1808 | uint32_t *uint32_t_alignment, | |
1809 | uint32_t *uint64_t_alignment, | |
1810 | uint32_t *long_alignment, | |
1811 | int *byte_order, | |
1812 | char *name) | |
1813 | { | |
1814 | ssize_t len; | |
1815 | struct ustctl_reg_msg reg_msg; | |
1816 | ||
1817 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
1818 | if (len > 0 && len != sizeof(reg_msg)) | |
1819 | return -EIO; | |
1820 | if (len == 0) | |
1821 | return -EPIPE; | |
1822 | if (len < 0) | |
1823 | return len; | |
1824 | ||
1825 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
1826 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1827 | BIG_ENDIAN : LITTLE_ENDIAN; | |
1828 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
1829 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1830 | LITTLE_ENDIAN : BIG_ENDIAN; | |
1831 | } else { | |
1832 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
1833 | } | |
1834 | switch (reg_msg.socket_type) { | |
1835 | case 0: *type = USTCTL_SOCKET_CMD; | |
1836 | break; | |
1837 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
1838 | break; | |
1839 | default: | |
1840 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
1841 | } | |
1842 | *major = reg_msg.major; | |
1843 | *minor = reg_msg.minor; | |
1844 | *pid = reg_msg.pid; | |
1845 | *ppid = reg_msg.ppid; | |
1846 | *uid = reg_msg.uid; | |
1847 | *gid = reg_msg.gid; | |
1848 | *bits_per_long = reg_msg.bits_per_long; | |
1849 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
1850 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
1851 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
1852 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
1853 | *long_alignment = reg_msg.long_alignment; | |
1854 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
1855 | if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) { | |
1856 | return -LTTNG_UST_ERR_UNSUP_MAJOR; | |
1857 | } | |
1858 | ||
1859 | return 0; | |
1860 | } | |
1861 | ||
1862 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
1863 | { | |
1864 | struct ustcomm_notify_hdr header; | |
1865 | ssize_t len; | |
1866 | ||
1867 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
1868 | if (len > 0 && len != sizeof(header)) | |
1869 | return -EIO; | |
1870 | if (len == 0) | |
1871 | return -EPIPE; | |
1872 | if (len < 0) | |
1873 | return len; | |
1874 | switch (header.notify_cmd) { | |
1875 | case 0: | |
1876 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1877 | break; | |
1878 | case 1: | |
1879 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1880 | break; | |
c785c634 MD |
1881 | case 2: |
1882 | *notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1883 | break; | |
32ce8569 MD |
1884 | default: |
1885 | return -EINVAL; | |
1886 | } | |
1887 | return 0; | |
1888 | } | |
1889 | ||
1890 | /* | |
1891 | * Returns 0 on success, negative error value on error. | |
1892 | */ | |
1893 | int ustctl_recv_register_event(int sock, | |
1894 | int *session_objd, | |
1895 | int *channel_objd, | |
1896 | char *event_name, | |
1897 | int *loglevel, | |
1898 | char **signature, | |
1899 | size_t *nr_fields, | |
1900 | struct ustctl_field **fields, | |
1901 | char **model_emf_uri) | |
1902 | { | |
1903 | ssize_t len; | |
1904 | struct ustcomm_notify_event_msg msg; | |
1905 | size_t signature_len, fields_len, model_emf_uri_len; | |
1906 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
1907 | struct ustctl_field *a_fields = NULL; | |
1908 | ||
1909 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1910 | if (len > 0 && len != sizeof(msg)) | |
1911 | return -EIO; | |
1912 | if (len == 0) | |
1913 | return -EPIPE; | |
1914 | if (len < 0) | |
1915 | return len; | |
1916 | ||
1917 | *session_objd = msg.session_objd; | |
1918 | *channel_objd = msg.channel_objd; | |
1919 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
1920 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1921 | *loglevel = msg.loglevel; | |
1922 | signature_len = msg.signature_len; | |
1923 | fields_len = msg.fields_len; | |
1924 | ||
1925 | if (fields_len % sizeof(*a_fields) != 0) { | |
1926 | return -EINVAL; | |
1927 | } | |
1928 | ||
1929 | model_emf_uri_len = msg.model_emf_uri_len; | |
1930 | ||
1931 | /* recv signature. contains at least \0. */ | |
1932 | a_sign = zmalloc(signature_len); | |
1933 | if (!a_sign) | |
1934 | return -ENOMEM; | |
1935 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
1936 | if (len > 0 && len != signature_len) { | |
1937 | len = -EIO; | |
1938 | goto signature_error; | |
1939 | } | |
1940 | if (len == 0) { | |
1941 | len = -EPIPE; | |
1942 | goto signature_error; | |
1943 | } | |
1944 | if (len < 0) { | |
1945 | goto signature_error; | |
1946 | } | |
1947 | /* Enforce end of string */ | |
111198c2 | 1948 | a_sign[signature_len - 1] = '\0'; |
32ce8569 MD |
1949 | |
1950 | /* recv fields */ | |
1951 | if (fields_len) { | |
1952 | a_fields = zmalloc(fields_len); | |
1953 | if (!a_fields) { | |
1954 | len = -ENOMEM; | |
1955 | goto signature_error; | |
1956 | } | |
1957 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
1958 | if (len > 0 && len != fields_len) { | |
1959 | len = -EIO; | |
1960 | goto fields_error; | |
1961 | } | |
1962 | if (len == 0) { | |
1963 | len = -EPIPE; | |
1964 | goto fields_error; | |
1965 | } | |
1966 | if (len < 0) { | |
1967 | goto fields_error; | |
1968 | } | |
1969 | } | |
1970 | ||
1971 | if (model_emf_uri_len) { | |
1972 | /* recv model_emf_uri_len */ | |
1973 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
1974 | if (!a_model_emf_uri) { | |
1975 | len = -ENOMEM; | |
1976 | goto fields_error; | |
1977 | } | |
1978 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
1979 | model_emf_uri_len); | |
1980 | if (len > 0 && len != model_emf_uri_len) { | |
1981 | len = -EIO; | |
1982 | goto model_error; | |
1983 | } | |
1984 | if (len == 0) { | |
1985 | len = -EPIPE; | |
1986 | goto model_error; | |
1987 | } | |
1988 | if (len < 0) { | |
1989 | goto model_error; | |
1990 | } | |
1991 | /* Enforce end of string */ | |
1992 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
1993 | } | |
1994 | ||
1995 | *signature = a_sign; | |
1996 | *nr_fields = fields_len / sizeof(*a_fields); | |
1997 | *fields = a_fields; | |
1998 | *model_emf_uri = a_model_emf_uri; | |
1999 | ||
2000 | return 0; | |
2001 | ||
2002 | model_error: | |
2003 | free(a_model_emf_uri); | |
2004 | fields_error: | |
2005 | free(a_fields); | |
2006 | signature_error: | |
2007 | free(a_sign); | |
2008 | return len; | |
2009 | } | |
2010 | ||
2011 | /* | |
2012 | * Returns 0 on success, negative error value on error. | |
2013 | */ | |
2014 | int ustctl_reply_register_event(int sock, | |
2015 | uint32_t id, | |
2016 | int ret_code) | |
2017 | { | |
2018 | ssize_t len; | |
2019 | struct { | |
2020 | struct ustcomm_notify_hdr header; | |
2021 | struct ustcomm_notify_event_reply r; | |
2022 | } reply; | |
2023 | ||
2024 | memset(&reply, 0, sizeof(reply)); | |
2025 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
2026 | reply.r.ret_code = ret_code; | |
2027 | reply.r.event_id = id; | |
2028 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2029 | if (len > 0 && len != sizeof(reply)) | |
2030 | return -EIO; | |
2031 | if (len < 0) | |
2032 | return len; | |
2033 | return 0; | |
2034 | } | |
2035 | ||
c785c634 MD |
2036 | /* |
2037 | * Returns 0 on success, negative UST or system error value on error. | |
2038 | */ | |
2039 | int ustctl_recv_register_enum(int sock, | |
2040 | int *session_objd, | |
2041 | char *enum_name, | |
2042 | struct ustctl_enum_entry **entries, | |
2043 | size_t *nr_entries) | |
2044 | { | |
2045 | ssize_t len; | |
2046 | struct ustcomm_notify_enum_msg msg; | |
2047 | size_t entries_len; | |
2048 | struct ustctl_enum_entry *a_entries = NULL; | |
2049 | ||
2050 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2051 | if (len > 0 && len != sizeof(msg)) | |
2052 | return -EIO; | |
2053 | if (len == 0) | |
2054 | return -EPIPE; | |
2055 | if (len < 0) | |
2056 | return len; | |
2057 | ||
2058 | *session_objd = msg.session_objd; | |
2059 | strncpy(enum_name, msg.enum_name, LTTNG_UST_SYM_NAME_LEN); | |
2060 | enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2061 | entries_len = msg.entries_len; | |
2062 | ||
2063 | if (entries_len % sizeof(*a_entries) != 0) { | |
2064 | return -EINVAL; | |
2065 | } | |
2066 | ||
2067 | /* recv entries */ | |
2068 | if (entries_len) { | |
2069 | a_entries = zmalloc(entries_len); | |
2070 | if (!a_entries) | |
2071 | return -ENOMEM; | |
2072 | len = ustcomm_recv_unix_sock(sock, a_entries, entries_len); | |
2073 | if (len > 0 && len != entries_len) { | |
2074 | len = -EIO; | |
2075 | goto entries_error; | |
2076 | } | |
2077 | if (len == 0) { | |
2078 | len = -EPIPE; | |
2079 | goto entries_error; | |
2080 | } | |
2081 | if (len < 0) { | |
2082 | goto entries_error; | |
2083 | } | |
2084 | } | |
2085 | *nr_entries = entries_len / sizeof(*a_entries); | |
2086 | *entries = a_entries; | |
2087 | ||
2088 | return 0; | |
2089 | ||
2090 | entries_error: | |
2091 | free(a_entries); | |
2092 | return len; | |
2093 | } | |
2094 | ||
2095 | /* | |
2096 | * Returns 0 on success, negative error value on error. | |
2097 | */ | |
2098 | int ustctl_reply_register_enum(int sock, | |
2099 | uint64_t id, | |
2100 | int ret_code) | |
2101 | { | |
2102 | ssize_t len; | |
2103 | struct { | |
2104 | struct ustcomm_notify_hdr header; | |
2105 | struct ustcomm_notify_enum_reply r; | |
2106 | } reply; | |
2107 | ||
2108 | memset(&reply, 0, sizeof(reply)); | |
2109 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
2110 | reply.r.ret_code = ret_code; | |
2111 | reply.r.enum_id = id; | |
2112 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2113 | if (len > 0 && len != sizeof(reply)) | |
2114 | return -EIO; | |
2115 | if (len < 0) | |
2116 | return len; | |
2117 | return 0; | |
2118 | } | |
2119 | ||
32ce8569 MD |
2120 | /* |
2121 | * Returns 0 on success, negative UST or system error value on error. | |
2122 | */ | |
2123 | int ustctl_recv_register_channel(int sock, | |
2124 | int *session_objd, /* session descriptor (output) */ | |
2125 | int *channel_objd, /* channel descriptor (output) */ | |
2126 | size_t *nr_fields, | |
2127 | struct ustctl_field **fields) | |
2128 | { | |
2129 | ssize_t len; | |
2130 | struct ustcomm_notify_channel_msg msg; | |
2131 | size_t fields_len; | |
2132 | struct ustctl_field *a_fields; | |
2133 | ||
2134 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2135 | if (len > 0 && len != sizeof(msg)) | |
2136 | return -EIO; | |
2137 | if (len == 0) | |
2138 | return -EPIPE; | |
2139 | if (len < 0) | |
2140 | return len; | |
2141 | ||
2142 | *session_objd = msg.session_objd; | |
2143 | *channel_objd = msg.channel_objd; | |
2144 | fields_len = msg.ctx_fields_len; | |
2145 | ||
2146 | if (fields_len % sizeof(*a_fields) != 0) { | |
2147 | return -EINVAL; | |
2148 | } | |
2149 | ||
2150 | /* recv fields */ | |
2151 | if (fields_len) { | |
2152 | a_fields = zmalloc(fields_len); | |
2153 | if (!a_fields) { | |
2154 | len = -ENOMEM; | |
2155 | goto alloc_error; | |
2156 | } | |
2157 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2158 | if (len > 0 && len != fields_len) { | |
2159 | len = -EIO; | |
2160 | goto fields_error; | |
2161 | } | |
2162 | if (len == 0) { | |
2163 | len = -EPIPE; | |
2164 | goto fields_error; | |
2165 | } | |
2166 | if (len < 0) { | |
2167 | goto fields_error; | |
2168 | } | |
2169 | *fields = a_fields; | |
2170 | } else { | |
2171 | *fields = NULL; | |
2172 | } | |
2173 | *nr_fields = fields_len / sizeof(*a_fields); | |
2174 | return 0; | |
2175 | ||
2176 | fields_error: | |
2177 | free(a_fields); | |
2178 | alloc_error: | |
2179 | return len; | |
2180 | } | |
2181 | ||
2182 | /* | |
2183 | * Returns 0 on success, negative error value on error. | |
2184 | */ | |
2185 | int ustctl_reply_register_channel(int sock, | |
2186 | uint32_t chan_id, | |
2187 | enum ustctl_channel_header header_type, | |
2188 | int ret_code) | |
2189 | { | |
2190 | ssize_t len; | |
2191 | struct { | |
2192 | struct ustcomm_notify_hdr header; | |
2193 | struct ustcomm_notify_channel_reply r; | |
2194 | } reply; | |
2195 | ||
2196 | memset(&reply, 0, sizeof(reply)); | |
2197 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
2198 | reply.r.ret_code = ret_code; | |
2199 | reply.r.chan_id = chan_id; | |
2200 | switch (header_type) { | |
2201 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
2202 | reply.r.header_type = 1; | |
2203 | break; | |
2204 | case USTCTL_CHANNEL_HEADER_LARGE: | |
2205 | reply.r.header_type = 2; | |
2206 | break; | |
2207 | default: | |
2208 | reply.r.header_type = 0; | |
2209 | break; | |
2210 | } | |
2211 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2212 | if (len > 0 && len != sizeof(reply)) | |
2213 | return -EIO; | |
2214 | if (len < 0) | |
2215 | return len; | |
2216 | return 0; | |
2217 | } | |
2218 | ||
f53329f3 JD |
2219 | /* Regenerate the statedump. */ |
2220 | int ustctl_regenerate_statedump(int sock, int handle) | |
2221 | { | |
2222 | struct ustcomm_ust_msg lum; | |
2223 | struct ustcomm_ust_reply lur; | |
2224 | int ret; | |
2225 | ||
2226 | memset(&lum, 0, sizeof(lum)); | |
2227 | lum.handle = handle; | |
2228 | lum.cmd = LTTNG_UST_SESSION_STATEDUMP; | |
2229 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
2230 | if (ret) | |
2231 | return ret; | |
2232 | DBG("Regenerated statedump for handle %u", handle); | |
2233 | return 0; | |
2234 | } | |
2235 | ||
74d81a6c MD |
2236 | static __attribute__((constructor)) |
2237 | void ustctl_init(void) | |
2238 | { | |
2239 | init_usterr(); | |
6f626d28 | 2240 | lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */ |
f9364363 | 2241 | lttng_ust_clock_init(); |
74d81a6c MD |
2242 | lttng_ring_buffer_metadata_client_init(); |
2243 | lttng_ring_buffer_client_overwrite_init(); | |
34a91bdb | 2244 | lttng_ring_buffer_client_overwrite_rt_init(); |
74d81a6c | 2245 | lttng_ring_buffer_client_discard_init(); |
34a91bdb | 2246 | lttng_ring_buffer_client_discard_rt_init(); |
03d2d293 | 2247 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
2248 | } |
2249 | ||
2250 | static __attribute__((destructor)) | |
2251 | void ustctl_exit(void) | |
2252 | { | |
34a91bdb | 2253 | lttng_ring_buffer_client_discard_rt_exit(); |
74d81a6c | 2254 | lttng_ring_buffer_client_discard_exit(); |
34a91bdb | 2255 | lttng_ring_buffer_client_overwrite_rt_exit(); |
74d81a6c MD |
2256 | lttng_ring_buffer_client_overwrite_exit(); |
2257 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 2258 | } |