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> |
4a07ff75 MD |
21 | #include <sys/types.h> |
22 | #include <sys/socket.h> | |
23 | ||
c62a3816 | 24 | #include <lttng/ust-config.h> |
4318ae1b MD |
25 | #include <lttng/ust-ctl.h> |
26 | #include <lttng/ust-abi.h> | |
c1fca457 | 27 | #include <lttng/ust-events.h> |
7a784989 | 28 | #include <sys/mman.h> |
32ce8569 | 29 | #include <byteswap.h> |
44c72f10 MD |
30 | |
31 | #include <usterr-signal-safe.h> | |
b728d87e | 32 | #include <ust-comm.h> |
74d81a6c | 33 | #include <helper.h> |
57773204 MD |
34 | |
35 | #include "../libringbuffer/backend.h" | |
36 | #include "../libringbuffer/frontend.h" | |
c9023c93 | 37 | #include "../liblttng-ust/wait.h" |
b2f3252a | 38 | #include "../liblttng-ust/lttng-rb-clients.h" |
f9364363 | 39 | #include "../liblttng-ust/clock.h" |
92ce256d | 40 | #include "../liblttng-ust/getenv.h" |
c9023c93 MD |
41 | |
42 | /* | |
43 | * Number of milliseconds to retry before failing metadata writes on | |
44 | * buffer full condition. (10 seconds) | |
45 | */ | |
46 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 | |
57773204 | 47 | |
74d81a6c MD |
48 | /* |
49 | * Channel representation within consumer. | |
50 | */ | |
51 | struct ustctl_consumer_channel { | |
52 | struct lttng_channel *chan; /* lttng channel buffers */ | |
6b120308 | 53 | |
74d81a6c MD |
54 | /* initial attributes */ |
55 | struct ustctl_consumer_channel_attr attr; | |
ff0f5728 MD |
56 | int wait_fd; /* monitor close() */ |
57 | int wakeup_fd; /* monitor close() */ | |
74d81a6c MD |
58 | }; |
59 | ||
60 | /* | |
61 | * Stream representation within consumer. | |
62 | */ | |
63 | struct ustctl_consumer_stream { | |
64 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
65 | struct lttng_ust_lib_ring_buffer *buf; | |
66 | struct ustctl_consumer_channel *chan; | |
67 | int shm_fd, wait_fd, wakeup_fd; | |
68 | int cpu; | |
69 | uint64_t memory_map_size; | |
70 | }; | |
71 | ||
72 | extern void lttng_ring_buffer_client_overwrite_init(void); | |
08a3170c | 73 | extern void lttng_ring_buffer_client_overwrite_rt_init(void); |
74d81a6c | 74 | extern void lttng_ring_buffer_client_discard_init(void); |
08a3170c | 75 | extern void lttng_ring_buffer_client_discard_rt_init(void); |
74d81a6c MD |
76 | extern void lttng_ring_buffer_metadata_client_init(void); |
77 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
08a3170c | 78 | extern void lttng_ring_buffer_client_overwrite_rt_exit(void); |
74d81a6c | 79 | extern void lttng_ring_buffer_client_discard_exit(void); |
08a3170c | 80 | extern void lttng_ring_buffer_client_discard_rt_exit(void); |
74d81a6c MD |
81 | extern void lttng_ring_buffer_metadata_client_exit(void); |
82 | ||
2be0e72c MD |
83 | int ustctl_release_handle(int sock, int handle) |
84 | { | |
85 | struct ustcomm_ust_msg lum; | |
86 | struct ustcomm_ust_reply lur; | |
2be0e72c | 87 | |
74d81a6c MD |
88 | if (sock < 0 || handle < 0) |
89 | return 0; | |
90 | memset(&lum, 0, sizeof(lum)); | |
91 | lum.handle = handle; | |
92 | lum.cmd = LTTNG_UST_RELEASE; | |
93 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 94 | } |
74d81a6c | 95 | |
12388166 MD |
96 | /* |
97 | * If sock is negative, it means we don't have to notify the other side | |
98 | * (e.g. application has already vanished). | |
99 | */ | |
d26228ae | 100 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 101 | { |
57773204 MD |
102 | int ret; |
103 | ||
9bfc503d MD |
104 | if (!data) |
105 | return -EINVAL; | |
106 | ||
74d81a6c MD |
107 | switch (data->type) { |
108 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
ff0f5728 MD |
109 | if (data->u.channel.wakeup_fd >= 0) { |
110 | ret = close(data->u.channel.wakeup_fd); | |
111 | if (ret < 0) { | |
112 | ret = -errno; | |
113 | return ret; | |
114 | } | |
bad4193f | 115 | data->u.channel.wakeup_fd = -1; |
ff0f5728 | 116 | } |
74d81a6c | 117 | free(data->u.channel.data); |
bad4193f | 118 | data->u.channel.data = NULL; |
74d81a6c MD |
119 | break; |
120 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
121 | if (data->u.stream.shm_fd >= 0) { | |
122 | ret = close(data->u.stream.shm_fd); | |
123 | if (ret < 0) { | |
124 | ret = -errno; | |
125 | return ret; | |
126 | } | |
bad4193f | 127 | data->u.stream.shm_fd = -1; |
d26228ae | 128 | } |
74d81a6c MD |
129 | if (data->u.stream.wakeup_fd >= 0) { |
130 | ret = close(data->u.stream.wakeup_fd); | |
131 | if (ret < 0) { | |
132 | ret = -errno; | |
133 | return ret; | |
134 | } | |
bad4193f | 135 | data->u.stream.wakeup_fd = -1; |
d26228ae | 136 | } |
74d81a6c | 137 | break; |
32ce8569 MD |
138 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
139 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
140 | break; | |
74d81a6c MD |
141 | default: |
142 | assert(0); | |
d26228ae | 143 | } |
2be0e72c | 144 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
145 | } |
146 | ||
1c5e467e MD |
147 | /* |
148 | * Send registration done packet to the application. | |
149 | */ | |
150 | int ustctl_register_done(int sock) | |
151 | { | |
152 | struct ustcomm_ust_msg lum; | |
153 | struct ustcomm_ust_reply lur; | |
154 | int ret; | |
155 | ||
156 | DBG("Sending register done command to %d", sock); | |
157 | memset(&lum, 0, sizeof(lum)); | |
158 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
159 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
160 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
161 | if (ret) | |
162 | return ret; | |
1c5e467e | 163 | return 0; |
1c5e467e MD |
164 | } |
165 | ||
57773204 MD |
166 | /* |
167 | * returns session handle. | |
168 | */ | |
169 | int ustctl_create_session(int sock) | |
170 | { | |
171 | struct ustcomm_ust_msg lum; | |
172 | struct ustcomm_ust_reply lur; | |
173 | int ret, session_handle; | |
174 | ||
175 | /* Create session */ | |
176 | memset(&lum, 0, sizeof(lum)); | |
177 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
178 | lum.cmd = LTTNG_UST_SESSION; | |
179 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
180 | if (ret) | |
181 | return ret; | |
182 | session_handle = lur.ret_val; | |
183 | DBG("received session handle %u", session_handle); | |
184 | return session_handle; | |
185 | } | |
186 | ||
57773204 | 187 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
188 | struct lttng_ust_object_data *channel_data, |
189 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
190 | { |
191 | struct ustcomm_ust_msg lum; | |
192 | struct ustcomm_ust_reply lur; | |
61f02aea | 193 | struct lttng_ust_object_data *event_data; |
57773204 MD |
194 | int ret; |
195 | ||
9bfc503d MD |
196 | if (!channel_data || !_event_data) |
197 | return -EINVAL; | |
198 | ||
74d81a6c | 199 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
200 | if (!event_data) |
201 | return -ENOMEM; | |
32ce8569 | 202 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
203 | memset(&lum, 0, sizeof(lum)); |
204 | lum.handle = channel_data->handle; | |
205 | lum.cmd = LTTNG_UST_EVENT; | |
206 | strncpy(lum.u.event.name, ev->name, | |
207 | LTTNG_UST_SYM_NAME_LEN); | |
208 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
209 | lum.u.event.loglevel_type = ev->loglevel_type; |
210 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
211 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
212 | if (ret) { | |
213 | free(event_data); | |
214 | return ret; | |
215 | } | |
216 | event_data->handle = lur.ret_val; | |
217 | DBG("received event handle %u", event_data->handle); | |
218 | *_event_data = event_data; | |
219 | return 0; | |
220 | } | |
221 | ||
53f0df51 | 222 | int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
61f02aea MD |
223 | struct lttng_ust_object_data *obj_data, |
224 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
225 | { |
226 | struct ustcomm_ust_msg lum; | |
227 | struct ustcomm_ust_reply lur; | |
53f0df51 JG |
228 | struct lttng_ust_object_data *context_data = NULL; |
229 | char *buf = NULL; | |
230 | size_t len; | |
57773204 MD |
231 | int ret; |
232 | ||
53f0df51 JG |
233 | if (!obj_data || !_context_data) { |
234 | ret = -EINVAL; | |
235 | goto end; | |
236 | } | |
9bfc503d | 237 | |
74d81a6c | 238 | context_data = zmalloc(sizeof(*context_data)); |
53f0df51 JG |
239 | if (!context_data) { |
240 | ret = -ENOMEM; | |
241 | goto end; | |
242 | } | |
32ce8569 | 243 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 244 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 245 | lum.handle = obj_data->handle; |
57773204 | 246 | lum.cmd = LTTNG_UST_CONTEXT; |
53f0df51 JG |
247 | |
248 | lum.u.context.ctx = ctx->ctx; | |
249 | switch (ctx->ctx) { | |
250 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
251 | lum.u.context.u.perf_counter = ctx->u.perf_counter; | |
252 | break; | |
253 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
254 | { | |
255 | size_t provider_name_len = strlen( | |
256 | ctx->u.app_ctx.provider_name) + 1; | |
257 | size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1; | |
258 | ||
259 | lum.u.context.u.app_ctx.provider_name_len = provider_name_len; | |
260 | lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len; | |
261 | ||
262 | len = provider_name_len + ctx_name_len; | |
263 | buf = zmalloc(len); | |
264 | if (!buf) { | |
265 | ret = -ENOMEM; | |
266 | goto end; | |
267 | } | |
268 | memcpy(buf, ctx->u.app_ctx.provider_name, | |
269 | provider_name_len); | |
270 | memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name, | |
271 | ctx_name_len); | |
272 | break; | |
273 | } | |
274 | default: | |
275 | break; | |
276 | } | |
277 | ret = ustcomm_send_app_msg(sock, &lum); | |
278 | if (ret) | |
279 | goto end; | |
280 | if (buf) { | |
281 | /* send var len ctx_name */ | |
282 | ret = ustcomm_send_unix_sock(sock, buf, len); | |
283 | if (ret < 0) { | |
284 | goto end; | |
285 | } | |
286 | if (ret != len) { | |
287 | ret = -EINVAL; | |
288 | goto end; | |
289 | } | |
290 | } | |
291 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
292 | if (ret < 0) { | |
293 | goto end; | |
57773204 | 294 | } |
32ce8569 MD |
295 | context_data->handle = -1; |
296 | DBG("Context created successfully"); | |
57773204 | 297 | *_context_data = context_data; |
53f0df51 JG |
298 | context_data = NULL; |
299 | end: | |
300 | free(context_data); | |
301 | free(buf); | |
57773204 MD |
302 | return ret; |
303 | } | |
304 | ||
cd54f6d9 MD |
305 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
306 | struct lttng_ust_object_data *obj_data) | |
307 | { | |
308 | struct ustcomm_ust_msg lum; | |
309 | struct ustcomm_ust_reply lur; | |
310 | int ret; | |
311 | ||
312 | if (!obj_data) | |
313 | return -EINVAL; | |
314 | ||
315 | memset(&lum, 0, sizeof(lum)); | |
316 | lum.handle = obj_data->handle; | |
317 | lum.cmd = LTTNG_UST_FILTER; | |
318 | lum.u.filter.data_size = bytecode->len; | |
319 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 320 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
321 | |
322 | ret = ustcomm_send_app_msg(sock, &lum); | |
323 | if (ret) | |
324 | return ret; | |
cd54f6d9 MD |
325 | /* send var len bytecode */ |
326 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
327 | bytecode->len); | |
328 | if (ret < 0) { | |
329 | return ret; | |
330 | } | |
7bc53e94 MD |
331 | if (ret != bytecode->len) |
332 | return -EINVAL; | |
333 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
334 | } |
335 | ||
da57c034 JI |
336 | int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion, |
337 | struct lttng_ust_object_data *obj_data) | |
338 | { | |
339 | struct ustcomm_ust_msg lum; | |
340 | struct ustcomm_ust_reply lur; | |
341 | int ret; | |
342 | ||
343 | if (!obj_data) { | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | memset(&lum, 0, sizeof(lum)); | |
348 | lum.handle = obj_data->handle; | |
349 | lum.cmd = LTTNG_UST_EXCLUSION; | |
350 | lum.u.exclusion.count = exclusion->count; | |
351 | ||
352 | ret = ustcomm_send_app_msg(sock, &lum); | |
353 | if (ret) { | |
354 | return ret; | |
355 | } | |
356 | ||
1628366f | 357 | /* send var len exclusion names */ |
da57c034 JI |
358 | ret = ustcomm_send_unix_sock(sock, |
359 | exclusion->names, | |
360 | exclusion->count * LTTNG_UST_SYM_NAME_LEN); | |
361 | if (ret < 0) { | |
362 | return ret; | |
363 | } | |
364 | if (ret != exclusion->count * LTTNG_UST_SYM_NAME_LEN) { | |
365 | return -EINVAL; | |
366 | } | |
367 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
368 | } | |
369 | ||
57773204 | 370 | /* Enable event, channel and session ioctl */ |
61f02aea | 371 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
372 | { |
373 | struct ustcomm_ust_msg lum; | |
374 | struct ustcomm_ust_reply lur; | |
375 | int ret; | |
376 | ||
9bfc503d MD |
377 | if (!object) |
378 | return -EINVAL; | |
379 | ||
57773204 MD |
380 | memset(&lum, 0, sizeof(lum)); |
381 | lum.handle = object->handle; | |
382 | lum.cmd = LTTNG_UST_ENABLE; | |
383 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
384 | if (ret) | |
385 | return ret; | |
386 | DBG("enabled handle %u", object->handle); | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /* Disable event, channel and session ioctl */ | |
61f02aea | 391 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
392 | { |
393 | struct ustcomm_ust_msg lum; | |
394 | struct ustcomm_ust_reply lur; | |
395 | int ret; | |
396 | ||
9bfc503d MD |
397 | if (!object) |
398 | return -EINVAL; | |
399 | ||
57773204 MD |
400 | memset(&lum, 0, sizeof(lum)); |
401 | lum.handle = object->handle; | |
402 | lum.cmd = LTTNG_UST_DISABLE; | |
403 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
404 | if (ret) | |
405 | return ret; | |
406 | DBG("disable handle %u", object->handle); | |
407 | return 0; | |
408 | } | |
409 | ||
4a6ca058 | 410 | int ustctl_start_session(int sock, int handle) |
57773204 | 411 | { |
61f02aea | 412 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
413 | |
414 | obj.handle = handle; | |
415 | return ustctl_enable(sock, &obj); | |
57773204 MD |
416 | } |
417 | ||
4a6ca058 | 418 | int ustctl_stop_session(int sock, int handle) |
57773204 | 419 | { |
61f02aea | 420 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
421 | |
422 | obj.handle = handle; | |
423 | return ustctl_disable(sock, &obj); | |
57773204 MD |
424 | } |
425 | ||
57773204 MD |
426 | int ustctl_tracepoint_list(int sock) |
427 | { | |
b115631f MD |
428 | struct ustcomm_ust_msg lum; |
429 | struct ustcomm_ust_reply lur; | |
430 | int ret, tp_list_handle; | |
431 | ||
432 | memset(&lum, 0, sizeof(lum)); | |
433 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
434 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
435 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
436 | if (ret) | |
437 | return ret; | |
438 | tp_list_handle = lur.ret_val; | |
439 | DBG("received tracepoint list handle %u", tp_list_handle); | |
440 | return tp_list_handle; | |
441 | } | |
442 | ||
443 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 444 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
445 | { |
446 | struct ustcomm_ust_msg lum; | |
447 | struct ustcomm_ust_reply lur; | |
448 | int ret; | |
449 | ||
9bfc503d MD |
450 | if (!iter) |
451 | return -EINVAL; | |
452 | ||
b115631f MD |
453 | memset(&lum, 0, sizeof(lum)); |
454 | lum.handle = tp_list_handle; | |
455 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
456 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
457 | if (ret) | |
458 | return ret; | |
882a56d7 | 459 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 460 | lur.u.tracepoint.name, |
882a56d7 | 461 | lur.u.tracepoint.loglevel); |
cbef6901 | 462 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 463 | return 0; |
57773204 MD |
464 | } |
465 | ||
40003310 MD |
466 | int ustctl_tracepoint_field_list(int sock) |
467 | { | |
468 | struct ustcomm_ust_msg lum; | |
469 | struct ustcomm_ust_reply lur; | |
470 | int ret, tp_field_list_handle; | |
471 | ||
472 | memset(&lum, 0, sizeof(lum)); | |
473 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
474 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
475 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
476 | if (ret) | |
477 | return ret; | |
478 | tp_field_list_handle = lur.ret_val; | |
479 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
480 | return tp_field_list_handle; | |
481 | } | |
482 | ||
483 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
484 | struct lttng_ust_field_iter *iter) | |
485 | { | |
486 | struct ustcomm_ust_msg lum; | |
487 | struct ustcomm_ust_reply lur; | |
488 | int ret; | |
489 | ssize_t len; | |
490 | ||
491 | if (!iter) | |
492 | return -EINVAL; | |
493 | ||
494 | memset(&lum, 0, sizeof(lum)); | |
495 | lum.handle = tp_field_list_handle; | |
496 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
497 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
498 | if (ret) | |
499 | return ret; | |
500 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
501 | if (len != sizeof(*iter)) { | |
502 | return -EINVAL; | |
503 | } | |
504 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
505 | iter->event_name, | |
506 | iter->loglevel, | |
507 | iter->field_name, | |
508 | iter->type); | |
509 | return 0; | |
510 | } | |
511 | ||
57773204 MD |
512 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
513 | { | |
514 | struct ustcomm_ust_msg lum; | |
515 | struct ustcomm_ust_reply lur; | |
516 | int ret; | |
517 | ||
9bfc503d MD |
518 | if (!v) |
519 | return -EINVAL; | |
520 | ||
57773204 MD |
521 | memset(&lum, 0, sizeof(lum)); |
522 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
523 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
524 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
525 | if (ret) | |
526 | return ret; | |
527 | memcpy(v, &lur.u.version, sizeof(*v)); | |
528 | DBG("received tracer version"); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | int ustctl_wait_quiescent(int sock) | |
533 | { | |
534 | struct ustcomm_ust_msg lum; | |
535 | struct ustcomm_ust_reply lur; | |
536 | int ret; | |
537 | ||
538 | memset(&lum, 0, sizeof(lum)); | |
539 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
540 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
541 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
542 | if (ret) | |
543 | return ret; | |
544 | DBG("waited for quiescent state"); | |
545 | return 0; | |
546 | } | |
547 | ||
548 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
549 | { | |
9bfc503d MD |
550 | if (!calibrate) |
551 | return -EINVAL; | |
552 | ||
57773204 MD |
553 | return -ENOSYS; |
554 | } | |
555 | ||
f1fffc57 MD |
556 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
557 | { | |
558 | struct ustcomm_ust_msg lum; | |
559 | struct ustcomm_ust_reply lur; | |
560 | int ret; | |
561 | ||
9bfc503d MD |
562 | if (!object) |
563 | return -EINVAL; | |
564 | ||
f1fffc57 MD |
565 | memset(&lum, 0, sizeof(lum)); |
566 | lum.handle = object->handle; | |
567 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
568 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
569 | if (ret) | |
570 | return ret; | |
571 | DBG("flushed buffer handle %u", object->handle); | |
572 | return 0; | |
573 | } | |
574 | ||
74d81a6c MD |
575 | static |
576 | int ustctl_send_channel(int sock, | |
577 | enum lttng_ust_chan_type type, | |
578 | void *data, | |
579 | uint64_t size, | |
ff0f5728 | 580 | int wakeup_fd, |
74d81a6c MD |
581 | int send_fd_only) |
582 | { | |
583 | ssize_t len; | |
584 | ||
585 | if (!send_fd_only) { | |
586 | /* Send mmap size */ | |
587 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
588 | if (len != sizeof(size)) { | |
589 | if (len < 0) | |
590 | return len; | |
591 | else | |
592 | return -EIO; | |
593 | } | |
594 | ||
595 | /* Send channel type */ | |
596 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
597 | if (len != sizeof(type)) { | |
598 | if (len < 0) | |
599 | return len; | |
600 | else | |
601 | return -EIO; | |
602 | } | |
603 | } | |
604 | ||
605 | /* Send channel data */ | |
606 | len = ustcomm_send_unix_sock(sock, data, size); | |
607 | if (len != size) { | |
608 | if (len < 0) | |
609 | return len; | |
610 | else | |
611 | return -EIO; | |
612 | } | |
57773204 | 613 | |
ff0f5728 MD |
614 | /* Send wakeup fd */ |
615 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
616 | if (len <= 0) { | |
617 | if (len < 0) | |
618 | return len; | |
619 | else | |
620 | return -EIO; | |
621 | } | |
74d81a6c MD |
622 | return 0; |
623 | } | |
624 | ||
625 | static | |
626 | int ustctl_send_stream(int sock, | |
627 | uint32_t stream_nr, | |
628 | uint64_t memory_map_size, | |
629 | int shm_fd, int wakeup_fd, | |
630 | int send_fd_only) | |
57773204 | 631 | { |
74d81a6c MD |
632 | ssize_t len; |
633 | int fds[2]; | |
634 | ||
635 | if (!send_fd_only) { | |
636 | if (shm_fd < 0) { | |
637 | /* finish iteration */ | |
638 | uint64_t v = -1; | |
639 | ||
640 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
641 | if (len != sizeof(v)) { | |
642 | if (len < 0) | |
643 | return len; | |
644 | else | |
645 | return -EIO; | |
646 | } | |
647 | return 0; | |
648 | } | |
649 | ||
650 | /* Send mmap size */ | |
651 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
652 | sizeof(memory_map_size)); | |
653 | if (len != sizeof(memory_map_size)) { | |
654 | if (len < 0) | |
655 | return len; | |
656 | else | |
657 | return -EIO; | |
658 | } | |
659 | ||
660 | /* Send stream nr */ | |
661 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
662 | sizeof(stream_nr)); | |
663 | if (len != sizeof(stream_nr)) { | |
664 | if (len < 0) | |
665 | return len; | |
666 | else | |
667 | return -EIO; | |
668 | } | |
669 | } | |
670 | ||
671 | /* Send shm fd and wakeup fd */ | |
672 | fds[0] = shm_fd; | |
673 | fds[1] = wakeup_fd; | |
674 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
675 | if (len <= 0) { | |
676 | if (len < 0) | |
677 | return len; | |
678 | else | |
679 | return -EIO; | |
680 | } | |
681 | return 0; | |
682 | } | |
683 | ||
684 | int ustctl_recv_channel_from_consumer(int sock, | |
685 | struct lttng_ust_object_data **_channel_data) | |
686 | { | |
687 | struct lttng_ust_object_data *channel_data; | |
688 | ssize_t len; | |
ff0f5728 | 689 | int wakeup_fd; |
7a784989 | 690 | int ret; |
57773204 | 691 | |
74d81a6c MD |
692 | channel_data = zmalloc(sizeof(*channel_data)); |
693 | if (!channel_data) { | |
694 | ret = -ENOMEM; | |
695 | goto error_alloc; | |
696 | } | |
697 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
12f3dabc | 698 | channel_data->handle = -1; |
74d81a6c MD |
699 | |
700 | /* recv mmap size */ | |
701 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
702 | sizeof(channel_data->size)); | |
703 | if (len != sizeof(channel_data->size)) { | |
704 | if (len < 0) | |
705 | ret = len; | |
706 | else | |
707 | ret = -EINVAL; | |
708 | goto error; | |
709 | } | |
9bfc503d | 710 | |
74d81a6c MD |
711 | /* recv channel type */ |
712 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
713 | sizeof(channel_data->u.channel.type)); | |
714 | if (len != sizeof(channel_data->u.channel.type)) { | |
715 | if (len < 0) | |
716 | ret = len; | |
717 | else | |
718 | ret = -EINVAL; | |
719 | goto error; | |
720 | } | |
721 | ||
722 | /* recv channel data */ | |
723 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
724 | if (!channel_data->u.channel.data) { | |
725 | ret = -ENOMEM; | |
726 | goto error; | |
727 | } | |
728 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
729 | channel_data->size); | |
730 | if (len != channel_data->size) { | |
731 | if (len < 0) | |
732 | ret = len; | |
733 | else | |
734 | ret = -EINVAL; | |
735 | goto error_recv_data; | |
736 | } | |
ff0f5728 MD |
737 | /* recv wakeup fd */ |
738 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
739 | if (len <= 0) { | |
740 | if (len < 0) { | |
741 | ret = len; | |
742 | goto error_recv_data; | |
743 | } else { | |
744 | ret = -EIO; | |
745 | goto error_recv_data; | |
746 | } | |
747 | } | |
748 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
749 | *_channel_data = channel_data; |
750 | return 0; | |
751 | ||
752 | error_recv_data: | |
753 | free(channel_data->u.channel.data); | |
754 | error: | |
755 | free(channel_data); | |
756 | error_alloc: | |
757 | return ret; | |
758 | } | |
759 | ||
760 | int ustctl_recv_stream_from_consumer(int sock, | |
761 | struct lttng_ust_object_data **_stream_data) | |
762 | { | |
763 | struct lttng_ust_object_data *stream_data; | |
764 | ssize_t len; | |
765 | int ret; | |
766 | int fds[2]; | |
767 | ||
768 | stream_data = zmalloc(sizeof(*stream_data)); | |
769 | if (!stream_data) { | |
770 | ret = -ENOMEM; | |
771 | goto error_alloc; | |
57773204 | 772 | } |
74d81a6c MD |
773 | |
774 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
775 | stream_data->handle = -1; | |
776 | ||
777 | /* recv mmap size */ | |
778 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
779 | sizeof(stream_data->size)); | |
780 | if (len != sizeof(stream_data->size)) { | |
781 | if (len < 0) | |
782 | ret = len; | |
783 | else | |
784 | ret = -EINVAL; | |
785 | goto error; | |
786 | } | |
787 | if (stream_data->size == -1) { | |
788 | ret = -LTTNG_UST_ERR_NOENT; | |
789 | goto error; | |
790 | } | |
791 | ||
792 | /* recv stream nr */ | |
793 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
794 | sizeof(stream_data->u.stream.stream_nr)); | |
795 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
796 | if (len < 0) | |
797 | ret = len; | |
798 | else | |
799 | ret = -EINVAL; | |
800 | goto error; | |
801 | } | |
802 | ||
803 | /* recv shm fd and wakeup fd */ | |
804 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
805 | if (len <= 0) { | |
806 | if (len < 0) { | |
807 | ret = len; | |
808 | goto error; | |
809 | } else { | |
810 | ret = -EIO; | |
811 | goto error; | |
0bfe09ec | 812 | } |
0bfe09ec | 813 | } |
74d81a6c MD |
814 | stream_data->u.stream.shm_fd = fds[0]; |
815 | stream_data->u.stream.wakeup_fd = fds[1]; | |
816 | *_stream_data = stream_data; | |
817 | return 0; | |
0bfe09ec | 818 | |
74d81a6c MD |
819 | error: |
820 | free(stream_data); | |
821 | error_alloc: | |
822 | return ret; | |
823 | } | |
824 | ||
825 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
826 | struct lttng_ust_object_data *channel_data) | |
827 | { | |
828 | struct ustcomm_ust_msg lum; | |
829 | struct ustcomm_ust_reply lur; | |
830 | int ret; | |
831 | ||
832 | if (!channel_data) | |
833 | return -EINVAL; | |
834 | ||
835 | memset(&lum, 0, sizeof(lum)); | |
836 | lum.handle = session_handle; | |
837 | lum.cmd = LTTNG_UST_CHANNEL; | |
838 | lum.u.channel.len = channel_data->size; | |
839 | lum.u.channel.type = channel_data->u.channel.type; | |
840 | ret = ustcomm_send_app_msg(sock, &lum); | |
841 | if (ret) | |
842 | return ret; | |
843 | ||
844 | ret = ustctl_send_channel(sock, | |
845 | channel_data->u.channel.type, | |
846 | channel_data->u.channel.data, | |
847 | channel_data->size, | |
ff0f5728 | 848 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
849 | 1); |
850 | if (ret) | |
851 | return ret; | |
852 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
853 | if (!ret) { | |
7f2348b8 | 854 | channel_data->handle = lur.ret_val; |
57773204 | 855 | } |
74d81a6c MD |
856 | return ret; |
857 | } | |
858 | ||
859 | int ustctl_send_stream_to_ust(int sock, | |
860 | struct lttng_ust_object_data *channel_data, | |
861 | struct lttng_ust_object_data *stream_data) | |
862 | { | |
863 | struct ustcomm_ust_msg lum; | |
864 | struct ustcomm_ust_reply lur; | |
865 | int ret; | |
866 | ||
867 | memset(&lum, 0, sizeof(lum)); | |
868 | lum.handle = channel_data->handle; | |
869 | lum.cmd = LTTNG_UST_STREAM; | |
870 | lum.u.stream.len = stream_data->size; | |
871 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
872 | ret = ustcomm_send_app_msg(sock, &lum); | |
873 | if (ret) | |
874 | return ret; | |
875 | ||
876 | assert(stream_data); | |
877 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
878 | ||
879 | ret = ustctl_send_stream(sock, | |
880 | stream_data->u.stream.stream_nr, | |
881 | stream_data->size, | |
882 | stream_data->u.stream.shm_fd, | |
883 | stream_data->u.stream.wakeup_fd, 1); | |
884 | if (ret) | |
885 | return ret; | |
886 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
887 | } | |
888 | ||
12f3dabc MD |
889 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, |
890 | struct lttng_ust_object_data *src) | |
891 | { | |
892 | struct lttng_ust_object_data *obj; | |
893 | int ret; | |
894 | ||
895 | if (src->handle != -1) { | |
896 | ret = -EINVAL; | |
897 | goto error; | |
898 | } | |
899 | ||
900 | obj = zmalloc(sizeof(*obj)); | |
901 | if (!obj) { | |
902 | ret = -ENOMEM; | |
903 | goto error; | |
904 | } | |
905 | ||
906 | obj->type = src->type; | |
907 | obj->handle = src->handle; | |
908 | obj->size = src->size; | |
909 | ||
910 | switch (obj->type) { | |
911 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
912 | { | |
913 | obj->u.channel.type = src->u.channel.type; | |
914 | if (src->u.channel.wakeup_fd >= 0) { | |
915 | obj->u.channel.wakeup_fd = | |
916 | dup(src->u.channel.wakeup_fd); | |
917 | if (obj->u.channel.wakeup_fd < 0) { | |
918 | ret = errno; | |
919 | goto chan_error_wakeup_fd; | |
920 | } | |
921 | } else { | |
922 | obj->u.channel.wakeup_fd = | |
923 | src->u.channel.wakeup_fd; | |
924 | } | |
925 | obj->u.channel.data = zmalloc(obj->size); | |
926 | if (!obj->u.channel.data) { | |
927 | ret = -ENOMEM; | |
928 | goto chan_error_alloc; | |
929 | } | |
930 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
931 | break; | |
932 | ||
933 | chan_error_alloc: | |
934 | if (src->u.channel.wakeup_fd >= 0) { | |
935 | int closeret; | |
936 | ||
937 | closeret = close(obj->u.channel.wakeup_fd); | |
938 | if (closeret) { | |
939 | PERROR("close"); | |
940 | } | |
941 | } | |
942 | chan_error_wakeup_fd: | |
943 | goto error_type; | |
944 | ||
945 | } | |
946 | ||
947 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
948 | { | |
949 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
950 | if (src->u.stream.wakeup_fd >= 0) { | |
951 | obj->u.stream.wakeup_fd = | |
952 | dup(src->u.stream.wakeup_fd); | |
953 | if (obj->u.stream.wakeup_fd < 0) { | |
954 | ret = errno; | |
955 | goto stream_error_wakeup_fd; | |
956 | } | |
957 | } else { | |
958 | obj->u.stream.wakeup_fd = | |
959 | src->u.stream.wakeup_fd; | |
960 | } | |
961 | ||
962 | if (src->u.stream.shm_fd >= 0) { | |
963 | obj->u.stream.shm_fd = | |
964 | dup(src->u.stream.shm_fd); | |
965 | if (obj->u.stream.shm_fd < 0) { | |
966 | ret = errno; | |
967 | goto stream_error_shm_fd; | |
968 | } | |
969 | } else { | |
970 | obj->u.stream.shm_fd = | |
971 | src->u.stream.shm_fd; | |
972 | } | |
973 | break; | |
974 | ||
975 | stream_error_shm_fd: | |
976 | if (src->u.stream.wakeup_fd >= 0) { | |
977 | int closeret; | |
978 | ||
979 | closeret = close(obj->u.stream.wakeup_fd); | |
980 | if (closeret) { | |
981 | PERROR("close"); | |
982 | } | |
983 | } | |
984 | stream_error_wakeup_fd: | |
985 | goto error_type; | |
986 | } | |
987 | ||
988 | default: | |
989 | ret = -EINVAL; | |
990 | goto error_type; | |
991 | } | |
992 | ||
993 | *dest = obj; | |
994 | return 0; | |
995 | ||
996 | error_type: | |
997 | free(obj); | |
998 | error: | |
999 | return ret; | |
1000 | } | |
1001 | ||
74d81a6c MD |
1002 | |
1003 | /* Buffer operations */ | |
1004 | ||
5ea386c3 MD |
1005 | int ustctl_get_nr_stream_per_channel(void) |
1006 | { | |
1007 | return num_possible_cpus(); | |
1008 | } | |
1009 | ||
74d81a6c | 1010 | struct ustctl_consumer_channel * |
5ea386c3 MD |
1011 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr, |
1012 | const int *stream_fds, int nr_stream_fds) | |
74d81a6c MD |
1013 | { |
1014 | struct ustctl_consumer_channel *chan; | |
1015 | const char *transport_name; | |
1016 | struct lttng_transport *transport; | |
1017 | ||
1018 | switch (attr->type) { | |
1019 | case LTTNG_UST_CHAN_PER_CPU: | |
1020 | if (attr->output == LTTNG_UST_MMAP) { | |
34a91bdb MD |
1021 | if (attr->overwrite) { |
1022 | if (attr->read_timer_interval == 0) { | |
1023 | transport_name = "relay-overwrite-mmap"; | |
1024 | } else { | |
1025 | transport_name = "relay-overwrite-rt-mmap"; | |
1026 | } | |
1027 | } else { | |
1028 | if (attr->read_timer_interval == 0) { | |
1029 | transport_name = "relay-discard-mmap"; | |
1030 | } else { | |
1031 | transport_name = "relay-discard-rt-mmap"; | |
1032 | } | |
1033 | } | |
74d81a6c MD |
1034 | } else { |
1035 | return NULL; | |
1036 | } | |
c1fca457 | 1037 | break; |
74d81a6c MD |
1038 | case LTTNG_UST_CHAN_METADATA: |
1039 | if (attr->output == LTTNG_UST_MMAP) | |
1040 | transport_name = "relay-metadata-mmap"; | |
1041 | else | |
1042 | return NULL; | |
c1fca457 MD |
1043 | break; |
1044 | default: | |
74d81a6c | 1045 | transport_name = "<unknown>"; |
c1fca457 MD |
1046 | return NULL; |
1047 | } | |
74d81a6c MD |
1048 | |
1049 | transport = lttng_transport_find(transport_name); | |
1050 | if (!transport) { | |
1051 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 1052 | transport_name); |
74d81a6c | 1053 | return NULL; |
7a784989 | 1054 | } |
74d81a6c MD |
1055 | |
1056 | chan = zmalloc(sizeof(*chan)); | |
1057 | if (!chan) | |
1058 | return NULL; | |
1059 | ||
1060 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 1061 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 1062 | attr->switch_timer_interval, |
32ce8569 | 1063 | attr->read_timer_interval, |
a9ff648c | 1064 | attr->uuid, attr->chan_id, |
b2c5f61a MD |
1065 | stream_fds, nr_stream_fds, |
1066 | attr->blocking_timeout); | |
74d81a6c MD |
1067 | if (!chan->chan) { |
1068 | goto chan_error; | |
1069 | } | |
1070 | chan->chan->ops = &transport->ops; | |
1071 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
cb7378b3 MD |
1072 | chan->wait_fd = ustctl_channel_get_wait_fd(chan); |
1073 | chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
1074 | return chan; |
1075 | ||
1076 | chan_error: | |
1077 | free(chan); | |
1078 | return NULL; | |
57773204 MD |
1079 | } |
1080 | ||
74d81a6c | 1081 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 1082 | { |
b24e4e91 MD |
1083 | (void) ustctl_channel_close_wait_fd(chan); |
1084 | (void) ustctl_channel_close_wakeup_fd(chan); | |
74d81a6c MD |
1085 | chan->chan->ops->channel_destroy(chan->chan); |
1086 | free(chan); | |
1087 | } | |
1088 | ||
1089 | int ustctl_send_channel_to_sessiond(int sock, | |
1090 | struct ustctl_consumer_channel *channel) | |
1091 | { | |
1092 | struct shm_object_table *table; | |
57773204 | 1093 | |
74d81a6c MD |
1094 | table = channel->chan->handle->table; |
1095 | if (table->size <= 0) | |
9bfc503d | 1096 | return -EINVAL; |
74d81a6c MD |
1097 | return ustctl_send_channel(sock, |
1098 | channel->attr.type, | |
1099 | table->objects[0].memory_map, | |
1100 | table->objects[0].memory_map_size, | |
ff0f5728 | 1101 | channel->wakeup_fd, |
74d81a6c MD |
1102 | 0); |
1103 | } | |
9bfc503d | 1104 | |
74d81a6c MD |
1105 | int ustctl_send_stream_to_sessiond(int sock, |
1106 | struct ustctl_consumer_stream *stream) | |
1107 | { | |
1108 | if (!stream) | |
1109 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
1110 | ||
1111 | return ustctl_send_stream(sock, | |
1112 | stream->cpu, | |
1113 | stream->memory_map_size, | |
1114 | stream->shm_fd, stream->wakeup_fd, | |
1115 | 0); | |
57773204 MD |
1116 | } |
1117 | ||
c9023c93 MD |
1118 | int ustctl_write_metadata_to_channel( |
1119 | struct ustctl_consumer_channel *channel, | |
1120 | const char *metadata_str, /* NOT null-terminated */ | |
1121 | size_t len) /* metadata length */ | |
1122 | { | |
1123 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1124 | struct lttng_channel *chan = channel->chan; | |
1125 | const char *str = metadata_str; | |
1126 | int ret = 0, waitret; | |
1127 | size_t reserve_len, pos; | |
1128 | ||
1129 | for (pos = 0; pos < len; pos += reserve_len) { | |
1130 | reserve_len = min_t(size_t, | |
1131 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1132 | len - pos); | |
1133 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1134 | sizeof(char), -1, chan->handle, NULL); |
c9023c93 MD |
1135 | /* |
1136 | * We don't care about metadata buffer's records lost | |
1137 | * count, because we always retry here. Report error if | |
1138 | * we need to bail out after timeout or being | |
1139 | * interrupted. | |
1140 | */ | |
1141 | waitret = wait_cond_interruptible_timeout( | |
1142 | ({ | |
1143 | ret = chan->ops->event_reserve(&ctx, 0); | |
1144 | ret != -ENOBUFS || !ret; | |
1145 | }), | |
1146 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1147 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1148 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1149 | waitret == -EINTR ? "interrupted" : | |
1150 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1151 | if (waitret == -EINTR) | |
1152 | ret = waitret; | |
1153 | goto end; | |
1154 | } | |
1155 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
1156 | chan->ops->event_commit(&ctx); | |
1157 | } | |
1158 | end: | |
1159 | return ret; | |
1160 | } | |
1161 | ||
3ef94b0e JD |
1162 | /* |
1163 | * Write at most one packet in the channel. | |
1164 | * Returns the number of bytes written on success, < 0 on error. | |
1165 | */ | |
1166 | ssize_t ustctl_write_one_packet_to_channel( | |
1167 | struct ustctl_consumer_channel *channel, | |
1168 | const char *metadata_str, /* NOT null-terminated */ | |
1169 | size_t len) /* metadata length */ | |
1170 | { | |
1171 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1172 | struct lttng_channel *chan = channel->chan; | |
1173 | const char *str = metadata_str; | |
1174 | ssize_t reserve_len; | |
1175 | int ret; | |
1176 | ||
1177 | reserve_len = min_t(ssize_t, | |
1178 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1179 | len); | |
1180 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1181 | sizeof(char), -1, chan->handle, NULL); |
3ef94b0e JD |
1182 | ret = chan->ops->event_reserve(&ctx, 0); |
1183 | if (ret != 0) { | |
1184 | DBG("LTTng: event reservation failed"); | |
1185 | assert(ret < 0); | |
1186 | reserve_len = ret; | |
1187 | goto end; | |
1188 | } | |
1189 | chan->ops->event_write(&ctx, str, reserve_len); | |
1190 | chan->ops->event_commit(&ctx); | |
1191 | ||
1192 | end: | |
1193 | return reserve_len; | |
1194 | } | |
1195 | ||
ff0f5728 MD |
1196 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan) |
1197 | { | |
1198 | struct channel *chan; | |
cb7378b3 | 1199 | int ret; |
ff0f5728 MD |
1200 | |
1201 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1202 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
ff0f5728 | 1203 | chan, chan->handle); |
cb7378b3 MD |
1204 | if (!ret) |
1205 | consumer_chan->wait_fd = -1; | |
1206 | return ret; | |
ff0f5728 MD |
1207 | } |
1208 | ||
1209 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan) | |
1210 | { | |
1211 | struct channel *chan; | |
cb7378b3 | 1212 | int ret; |
ff0f5728 MD |
1213 | |
1214 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1215 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1216 | chan, chan->handle); |
cb7378b3 MD |
1217 | if (!ret) |
1218 | consumer_chan->wakeup_fd = -1; | |
1219 | return ret; | |
ff0f5728 MD |
1220 | } |
1221 | ||
74d81a6c | 1222 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
1223 | { |
1224 | struct channel *chan; | |
1225 | ||
74d81a6c | 1226 | chan = stream->chan->chan->chan; |
ff0f5728 | 1227 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
74d81a6c | 1228 | chan, stream->handle, stream->cpu); |
5224b5c8 MD |
1229 | } |
1230 | ||
74d81a6c | 1231 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 1232 | { |
66bdd22a | 1233 | struct channel *chan; |
74d81a6c MD |
1234 | |
1235 | chan = stream->chan->chan->chan; | |
ff0f5728 | 1236 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
74d81a6c MD |
1237 | chan, stream->handle, stream->cpu); |
1238 | } | |
1239 | ||
1240 | struct ustctl_consumer_stream * | |
1241 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
1242 | int cpu) | |
1243 | { | |
1244 | struct ustctl_consumer_stream *stream; | |
1245 | struct lttng_ust_shm_handle *handle; | |
1246 | struct channel *chan; | |
1247 | int shm_fd, wait_fd, wakeup_fd; | |
1248 | uint64_t memory_map_size; | |
4cfec15c | 1249 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
1250 | int ret; |
1251 | ||
74d81a6c MD |
1252 | if (!channel) |
1253 | return NULL; | |
1254 | handle = channel->chan->handle; | |
9bfc503d MD |
1255 | if (!handle) |
1256 | return NULL; | |
1257 | ||
74d81a6c | 1258 | chan = channel->chan->chan; |
6e922b24 | 1259 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
1260 | chan, cpu, handle, &shm_fd, &wait_fd, |
1261 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
1262 | if (!buf) |
1263 | return NULL; | |
74d81a6c | 1264 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1265 | if (ret) |
1266 | return NULL; | |
74d81a6c MD |
1267 | |
1268 | stream = zmalloc(sizeof(*stream)); | |
1269 | if (!stream) | |
1270 | goto alloc_error; | |
1271 | stream->handle = handle; | |
1272 | stream->buf = buf; | |
1273 | stream->chan = channel; | |
1274 | stream->shm_fd = shm_fd; | |
1275 | stream->wait_fd = wait_fd; | |
1276 | stream->wakeup_fd = wakeup_fd; | |
1277 | stream->memory_map_size = memory_map_size; | |
1278 | stream->cpu = cpu; | |
1279 | return stream; | |
1280 | ||
1281 | alloc_error: | |
1282 | return NULL; | |
1283 | } | |
1284 | ||
1285 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
1286 | { | |
1287 | struct lttng_ust_lib_ring_buffer *buf; | |
1288 | struct ustctl_consumer_channel *consumer_chan; | |
1289 | ||
1290 | assert(stream); | |
1291 | buf = stream->buf; | |
1292 | consumer_chan = stream->chan; | |
b24e4e91 MD |
1293 | (void) ustctl_stream_close_wait_fd(stream); |
1294 | (void) ustctl_stream_close_wakeup_fd(stream); | |
74d81a6c MD |
1295 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); |
1296 | free(stream); | |
6e922b24 MD |
1297 | } |
1298 | ||
ff0f5728 MD |
1299 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan) |
1300 | { | |
1301 | if (!chan) | |
1302 | return -EINVAL; | |
1303 | return shm_get_wait_fd(chan->chan->handle, | |
1304 | &chan->chan->handle->chan._ref); | |
1305 | } | |
1306 | ||
1307 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan) | |
1308 | { | |
1309 | if (!chan) | |
1310 | return -EINVAL; | |
1311 | return shm_get_wakeup_fd(chan->chan->handle, | |
1312 | &chan->chan->handle->chan._ref); | |
1313 | } | |
1314 | ||
1315 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream) | |
6e922b24 | 1316 | { |
74d81a6c MD |
1317 | struct lttng_ust_lib_ring_buffer *buf; |
1318 | struct ustctl_consumer_channel *consumer_chan; | |
1319 | ||
1320 | if (!stream) | |
1321 | return -EINVAL; | |
1322 | buf = stream->buf; | |
1323 | consumer_chan = stream->chan; | |
1324 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
1325 | } | |
1326 | ||
ff0f5728 | 1327 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
74d81a6c MD |
1328 | { |
1329 | struct lttng_ust_lib_ring_buffer *buf; | |
1330 | struct ustctl_consumer_channel *consumer_chan; | |
1331 | ||
1332 | if (!stream) | |
1333 | return -EINVAL; | |
1334 | buf = stream->buf; | |
1335 | consumer_chan = stream->chan; | |
1336 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
1337 | } |
1338 | ||
57773204 MD |
1339 | /* For mmap mode, readable without "get" operation */ |
1340 | ||
74d81a6c | 1341 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 1342 | { |
74d81a6c MD |
1343 | struct lttng_ust_lib_ring_buffer *buf; |
1344 | struct ustctl_consumer_channel *consumer_chan; | |
1345 | ||
1346 | if (!stream) | |
9bfc503d | 1347 | return NULL; |
74d81a6c MD |
1348 | buf = stream->buf; |
1349 | consumer_chan = stream->chan; | |
1350 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1351 | } |
1352 | ||
57773204 | 1353 | /* returns the length to mmap. */ |
74d81a6c | 1354 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1355 | unsigned long *len) |
1356 | { | |
74d81a6c | 1357 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1358 | unsigned long mmap_buf_len; |
66bdd22a | 1359 | struct channel *chan; |
57773204 | 1360 | |
74d81a6c | 1361 | if (!stream) |
9bfc503d | 1362 | return -EINVAL; |
74d81a6c MD |
1363 | consumer_chan = stream->chan; |
1364 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1365 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1366 | return -EINVAL; | |
1367 | mmap_buf_len = chan->backend.buf_size; | |
1368 | if (chan->backend.extra_reader_sb) | |
1369 | mmap_buf_len += chan->backend.subbuf_size; | |
1370 | if (mmap_buf_len > INT_MAX) | |
1371 | return -EFBIG; | |
1372 | *len = mmap_buf_len; | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1377 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1378 | unsigned long *len) |
1379 | { | |
74d81a6c | 1380 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1381 | struct channel *chan; |
57773204 | 1382 | |
74d81a6c | 1383 | if (!stream) |
9bfc503d | 1384 | return -EINVAL; |
74d81a6c MD |
1385 | consumer_chan = stream->chan; |
1386 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1387 | *len = chan->backend.subbuf_size; |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | /* | |
1392 | * For mmap mode, operate on the current packet (between get/put or | |
1393 | * get_next/put_next). | |
1394 | */ | |
1395 | ||
1396 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1397 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1398 | unsigned long *off) | |
57773204 | 1399 | { |
66bdd22a | 1400 | struct channel *chan; |
57773204 | 1401 | unsigned long sb_bindex; |
74d81a6c MD |
1402 | struct lttng_ust_lib_ring_buffer *buf; |
1403 | struct ustctl_consumer_channel *consumer_chan; | |
34daae3e MD |
1404 | struct lttng_ust_lib_ring_buffer_backend_pages_shmp *barray_idx; |
1405 | struct lttng_ust_lib_ring_buffer_backend_pages *pages; | |
57773204 | 1406 | |
74d81a6c | 1407 | if (!stream) |
9bfc503d | 1408 | return -EINVAL; |
74d81a6c MD |
1409 | buf = stream->buf; |
1410 | consumer_chan = stream->chan; | |
1411 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1412 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1413 | return -EINVAL; | |
1414 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1415 | buf->backend.buf_rsb.id); |
34daae3e MD |
1416 | barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array, |
1417 | sb_bindex); | |
1418 | if (!barray_idx) | |
1419 | return -EINVAL; | |
1420 | pages = shmp(consumer_chan->chan->handle, barray_idx->shmp); | |
1421 | if (!pages) | |
1422 | return -EINVAL; | |
1423 | *off = pages->mmap_offset; | |
57773204 MD |
1424 | return 0; |
1425 | } | |
1426 | ||
1427 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1428 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1429 | unsigned long *len) | |
57773204 | 1430 | { |
74d81a6c | 1431 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1432 | struct channel *chan; |
74d81a6c | 1433 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1434 | |
74d81a6c | 1435 | if (!stream) |
9bfc503d MD |
1436 | return -EINVAL; |
1437 | ||
74d81a6c MD |
1438 | buf = stream->buf; |
1439 | consumer_chan = stream->chan; | |
1440 | chan = consumer_chan->chan->chan; | |
57773204 | 1441 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1442 | consumer_chan->chan->handle); |
57773204 MD |
1443 | return 0; |
1444 | } | |
1445 | ||
1446 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1447 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1448 | unsigned long *len) | |
57773204 | 1449 | { |
74d81a6c | 1450 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1451 | struct channel *chan; |
74d81a6c | 1452 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1453 | |
74d81a6c | 1454 | if (!stream) |
9bfc503d | 1455 | return -EINVAL; |
74d81a6c MD |
1456 | buf = stream->buf; |
1457 | consumer_chan = stream->chan; | |
1458 | chan = consumer_chan->chan->chan; | |
57773204 | 1459 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1460 | consumer_chan->chan->handle); |
57773204 MD |
1461 | *len = PAGE_ALIGN(*len); |
1462 | return 0; | |
1463 | } | |
1464 | ||
1465 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1466 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1467 | { |
74d81a6c MD |
1468 | struct lttng_ust_lib_ring_buffer *buf; |
1469 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1470 | |
74d81a6c MD |
1471 | if (!stream) |
1472 | return -EINVAL; | |
1473 | buf = stream->buf; | |
1474 | consumer_chan = stream->chan; | |
1475 | return lib_ring_buffer_get_next_subbuf(buf, | |
1476 | consumer_chan->chan->handle); | |
57773204 MD |
1477 | } |
1478 | ||
1479 | ||
1480 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1481 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1482 | { |
74d81a6c MD |
1483 | struct lttng_ust_lib_ring_buffer *buf; |
1484 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1485 | |
74d81a6c MD |
1486 | if (!stream) |
1487 | return -EINVAL; | |
1488 | buf = stream->buf; | |
1489 | consumer_chan = stream->chan; | |
1490 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1491 | return 0; |
1492 | } | |
1493 | ||
1494 | /* snapshot */ | |
1495 | ||
1496 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1497 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1498 | { |
74d81a6c MD |
1499 | struct lttng_ust_lib_ring_buffer *buf; |
1500 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1501 | |
74d81a6c MD |
1502 | if (!stream) |
1503 | return -EINVAL; | |
1504 | buf = stream->buf; | |
1505 | consumer_chan = stream->chan; | |
57773204 | 1506 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1507 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1508 | } |
1509 | ||
f45930b7 JG |
1510 | /* |
1511 | * Get a snapshot of the current ring buffer producer and consumer positions | |
1512 | * even if the consumed and produced positions are contained within the same | |
1513 | * subbuffer. | |
1514 | */ | |
1515 | int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream) | |
1516 | { | |
1517 | struct lttng_ust_lib_ring_buffer *buf; | |
1518 | struct ustctl_consumer_channel *consumer_chan; | |
1519 | ||
1520 | if (!stream) | |
1521 | return -EINVAL; | |
1522 | buf = stream->buf; | |
1523 | consumer_chan = stream->chan; | |
1524 | return lib_ring_buffer_snapshot_sample_positions(buf, | |
1525 | &buf->cons_snapshot, &buf->prod_snapshot, | |
1526 | consumer_chan->chan->handle); | |
1527 | } | |
1528 | ||
57773204 | 1529 | /* Get the consumer position (iteration start) */ |
74d81a6c MD |
1530 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1531 | unsigned long *pos) | |
57773204 | 1532 | { |
74d81a6c | 1533 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1534 | |
74d81a6c MD |
1535 | if (!stream) |
1536 | return -EINVAL; | |
1537 | buf = stream->buf; | |
57773204 MD |
1538 | *pos = buf->cons_snapshot; |
1539 | return 0; | |
1540 | } | |
1541 | ||
1542 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1543 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1544 | unsigned long *pos) | |
57773204 | 1545 | { |
74d81a6c | 1546 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1547 | |
74d81a6c MD |
1548 | if (!stream) |
1549 | return -EINVAL; | |
1550 | buf = stream->buf; | |
57773204 MD |
1551 | *pos = buf->prod_snapshot; |
1552 | return 0; | |
1553 | } | |
1554 | ||
1555 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1556 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1557 | unsigned long *pos) | |
57773204 | 1558 | { |
74d81a6c MD |
1559 | struct lttng_ust_lib_ring_buffer *buf; |
1560 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1561 | |
74d81a6c MD |
1562 | if (!stream) |
1563 | return -EINVAL; | |
1564 | buf = stream->buf; | |
1565 | consumer_chan = stream->chan; | |
1566 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1567 | consumer_chan->chan->handle); | |
57773204 MD |
1568 | } |
1569 | ||
1570 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1571 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1572 | { |
74d81a6c MD |
1573 | struct lttng_ust_lib_ring_buffer *buf; |
1574 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1575 | |
74d81a6c MD |
1576 | if (!stream) |
1577 | return -EINVAL; | |
1578 | buf = stream->buf; | |
1579 | consumer_chan = stream->chan; | |
1580 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1581 | return 0; |
1582 | } | |
1583 | ||
74d81a6c | 1584 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1585 | int producer_active) |
57773204 | 1586 | { |
74d81a6c MD |
1587 | struct lttng_ust_lib_ring_buffer *buf; |
1588 | struct ustctl_consumer_channel *consumer_chan; | |
1589 | ||
1590 | assert(stream); | |
1591 | buf = stream->buf; | |
1592 | consumer_chan = stream->chan; | |
b52190f2 MD |
1593 | lib_ring_buffer_switch_slow(buf, |
1594 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1595 | consumer_chan->chan->handle); |
1596 | } | |
1597 | ||
beca55a1 MD |
1598 | void ustctl_clear_buffer(struct ustctl_consumer_stream *stream) |
1599 | { | |
1600 | struct lttng_ust_lib_ring_buffer *buf; | |
1601 | struct ustctl_consumer_channel *consumer_chan; | |
1602 | ||
1603 | assert(stream); | |
1604 | buf = stream->buf; | |
1605 | consumer_chan = stream->chan; | |
1606 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, | |
1607 | consumer_chan->chan->handle); | |
1608 | lib_ring_buffer_clear_reader(buf, consumer_chan->chan->handle); | |
1609 | } | |
1610 | ||
b2f3252a JD |
1611 | static |
1612 | struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb( | |
1613 | struct lttng_ust_lib_ring_buffer *buf, | |
1614 | struct lttng_ust_shm_handle *handle) | |
1615 | { | |
1616 | struct channel *chan; | |
1617 | const struct lttng_ust_lib_ring_buffer_config *config; | |
1618 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1619 | ||
1620 | chan = shmp(handle, buf->backend.chan); | |
34daae3e MD |
1621 | if (!chan) |
1622 | return NULL; | |
b2f3252a JD |
1623 | config = &chan->backend.config; |
1624 | if (!config->cb_ptr) | |
1625 | return NULL; | |
1626 | client_cb = caa_container_of(config->cb_ptr, | |
1627 | struct lttng_ust_client_lib_ring_buffer_client_cb, | |
1628 | parent); | |
1629 | return client_cb; | |
1630 | } | |
1631 | ||
1632 | int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream, | |
1633 | uint64_t *timestamp_begin) | |
1634 | { | |
1635 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1636 | struct lttng_ust_lib_ring_buffer *buf; |
1637 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1638 | |
1639 | if (!stream || !timestamp_begin) | |
1640 | return -EINVAL; | |
e1919a41 MD |
1641 | buf = stream->buf; |
1642 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1643 | client_cb = get_client_cb(buf, handle); |
1644 | if (!client_cb) | |
1645 | return -ENOSYS; | |
1646 | return client_cb->timestamp_begin(buf, handle, timestamp_begin); | |
1647 | } | |
1648 | ||
1649 | int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream, | |
1650 | uint64_t *timestamp_end) | |
1651 | { | |
1652 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1653 | struct lttng_ust_lib_ring_buffer *buf; |
1654 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1655 | |
1656 | if (!stream || !timestamp_end) | |
1657 | return -EINVAL; | |
e1919a41 MD |
1658 | buf = stream->buf; |
1659 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1660 | client_cb = get_client_cb(buf, handle); |
1661 | if (!client_cb) | |
1662 | return -ENOSYS; | |
1663 | return client_cb->timestamp_end(buf, handle, timestamp_end); | |
1664 | } | |
1665 | ||
1666 | int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream, | |
1667 | uint64_t *events_discarded) | |
1668 | { | |
1669 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1670 | struct lttng_ust_lib_ring_buffer *buf; |
1671 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1672 | |
1673 | if (!stream || !events_discarded) | |
1674 | return -EINVAL; | |
e1919a41 MD |
1675 | buf = stream->buf; |
1676 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1677 | client_cb = get_client_cb(buf, handle); |
1678 | if (!client_cb) | |
1679 | return -ENOSYS; | |
1680 | return client_cb->events_discarded(buf, handle, events_discarded); | |
1681 | } | |
1682 | ||
1683 | int ustctl_get_content_size(struct ustctl_consumer_stream *stream, | |
1684 | uint64_t *content_size) | |
1685 | { | |
1686 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1687 | struct lttng_ust_lib_ring_buffer *buf; |
1688 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1689 | |
1690 | if (!stream || !content_size) | |
1691 | return -EINVAL; | |
e1919a41 MD |
1692 | buf = stream->buf; |
1693 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1694 | client_cb = get_client_cb(buf, handle); |
1695 | if (!client_cb) | |
1696 | return -ENOSYS; | |
1697 | return client_cb->content_size(buf, handle, content_size); | |
1698 | } | |
1699 | ||
1700 | int ustctl_get_packet_size(struct ustctl_consumer_stream *stream, | |
1701 | uint64_t *packet_size) | |
1702 | { | |
1703 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1704 | struct lttng_ust_lib_ring_buffer *buf; |
1705 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1706 | |
1707 | if (!stream || !packet_size) | |
1708 | return -EINVAL; | |
e1919a41 MD |
1709 | buf = stream->buf; |
1710 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1711 | client_cb = get_client_cb(buf, handle); |
1712 | if (!client_cb) | |
1713 | return -ENOSYS; | |
1714 | return client_cb->packet_size(buf, handle, packet_size); | |
1715 | } | |
1716 | ||
1717 | int ustctl_get_stream_id(struct ustctl_consumer_stream *stream, | |
1718 | uint64_t *stream_id) | |
1719 | { | |
1720 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1721 | struct lttng_ust_lib_ring_buffer *buf; |
1722 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1723 | |
1724 | if (!stream || !stream_id) | |
1725 | return -EINVAL; | |
e1919a41 MD |
1726 | buf = stream->buf; |
1727 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1728 | client_cb = get_client_cb(buf, handle); |
1729 | if (!client_cb) | |
1730 | return -ENOSYS; | |
1731 | return client_cb->stream_id(buf, handle, stream_id); | |
1732 | } | |
1733 | ||
fca361e8 JD |
1734 | int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream, |
1735 | uint64_t *ts) | |
1736 | { | |
1737 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1738 | struct lttng_ust_lib_ring_buffer *buf; |
1739 | struct lttng_ust_shm_handle *handle; | |
fca361e8 JD |
1740 | |
1741 | if (!stream || !ts) | |
1742 | return -EINVAL; | |
e1919a41 MD |
1743 | buf = stream->buf; |
1744 | handle = stream->chan->chan->handle; | |
fca361e8 JD |
1745 | client_cb = get_client_cb(buf, handle); |
1746 | if (!client_cb || !client_cb->current_timestamp) | |
1747 | return -ENOSYS; | |
1748 | return client_cb->current_timestamp(buf, handle, ts); | |
1749 | } | |
1750 | ||
1ff31389 JD |
1751 | int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream, |
1752 | uint64_t *seq) | |
1753 | { | |
1754 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1755 | struct lttng_ust_lib_ring_buffer *buf; | |
1756 | struct lttng_ust_shm_handle *handle; | |
1757 | ||
1758 | if (!stream || !seq) | |
1759 | return -EINVAL; | |
1760 | buf = stream->buf; | |
1761 | handle = stream->chan->chan->handle; | |
1762 | client_cb = get_client_cb(buf, handle); | |
1763 | if (!client_cb || !client_cb->sequence_number) | |
1764 | return -ENOSYS; | |
1765 | return client_cb->sequence_number(buf, handle, seq); | |
1766 | } | |
1767 | ||
45a00b05 JD |
1768 | int ustctl_get_instance_id(struct ustctl_consumer_stream *stream, |
1769 | uint64_t *id) | |
1770 | { | |
1771 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1772 | struct lttng_ust_lib_ring_buffer *buf; | |
1773 | struct lttng_ust_shm_handle *handle; | |
1774 | ||
1775 | if (!stream || !id) | |
1776 | return -EINVAL; | |
1777 | buf = stream->buf; | |
1778 | handle = stream->chan->chan->handle; | |
1779 | client_cb = get_client_cb(buf, handle); | |
1780 | if (!client_cb) | |
1781 | return -ENOSYS; | |
1782 | return client_cb->instance_id(buf, handle, id); | |
1783 | } | |
1784 | ||
c62a3816 | 1785 | #ifdef LTTNG_UST_HAVE_PERF_EVENT |
57201bb3 MD |
1786 | |
1787 | int ustctl_has_perf_counters(void) | |
1788 | { | |
1789 | return 1; | |
1790 | } | |
1791 | ||
1792 | #else | |
1793 | ||
1794 | int ustctl_has_perf_counters(void) | |
1795 | { | |
1796 | return 0; | |
1797 | } | |
1798 | ||
1799 | #endif | |
1800 | ||
4a07ff75 MD |
1801 | #ifdef __linux__ |
1802 | /* | |
1803 | * Override application pid/uid/gid with unix socket credentials. If | |
1804 | * the application announced a pid matching our view, it means it is | |
1805 | * within the same pid namespace, so expose the ppid provided by the | |
1806 | * application. | |
1807 | */ | |
1808 | static | |
1809 | int get_cred(int sock, | |
1810 | const struct ustctl_reg_msg *reg_msg, | |
1811 | uint32_t *pid, | |
1812 | uint32_t *ppid, | |
1813 | uint32_t *uid, | |
1814 | uint32_t *gid) | |
1815 | { | |
1816 | struct ucred ucred; | |
1817 | socklen_t ucred_len = sizeof(struct ucred); | |
1818 | int ret; | |
1819 | ||
1820 | ret = getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &ucred, &ucred_len); | |
1821 | if (ret) { | |
1822 | return -LTTNG_UST_ERR_PEERCRED; | |
1823 | } | |
1824 | DBG("Unix socket peercred [ pid: %u, uid: %u, gid: %u ], " | |
1825 | "application registered claiming [ pid: %u, ppid: %u, uid: %u, gid: %u ]", | |
1826 | ucred.pid, ucred.uid, ucred.gid, | |
1827 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); | |
1828 | if (!ucred.pid) { | |
1829 | ERR("Unix socket credential pid=0. Refusing application in distinct, non-nested pid namespace."); | |
1830 | return -LTTNG_UST_ERR_PEERCRED_PID; | |
1831 | } | |
1832 | *pid = ucred.pid; | |
1833 | *uid = ucred.uid; | |
1834 | *gid = ucred.gid; | |
1835 | if (ucred.pid == reg_msg->pid) { | |
1836 | *ppid = reg_msg->ppid; | |
1837 | } else { | |
1838 | *ppid = 0; | |
1839 | } | |
1840 | return 0; | |
1841 | } | |
1842 | #elif defined(__FreeBSD__) | |
1843 | #include <sys/ucred.h> | |
9f327dfe | 1844 | #include <sys/un.h> |
4a07ff75 MD |
1845 | |
1846 | /* | |
1847 | * Override application uid/gid with unix socket credentials. Use the | |
1848 | * first group of the cr_groups. | |
1849 | * Use the pid and ppid provided by the application on registration. | |
1850 | */ | |
1851 | static | |
1852 | int get_cred(int sock, | |
1853 | const struct ustctl_reg_msg *reg_msg, | |
1854 | uint32_t *pid, | |
1855 | uint32_t *ppid, | |
1856 | uint32_t *uid, | |
1857 | uint32_t *gid) | |
1858 | { | |
1859 | struct xucred xucred; | |
1860 | socklen_t xucred_len = sizeof(struct xucred); | |
1861 | int ret; | |
1862 | ||
1863 | ret = getsockopt(sock, SOL_SOCKET, LOCAL_PEERCRED, &xucred, &xucred_len); | |
1864 | if (ret) { | |
1865 | return -LTTNG_UST_ERR_PEERCRED; | |
1866 | } | |
1867 | if (xucred.cr_version != XUCRED_VERSION || xucred.cr_ngroups < 1) { | |
1868 | return -LTTNG_UST_ERR_PEERCRED; | |
1869 | } | |
1870 | DBG("Unix socket peercred [ uid: %u, gid: %u ], " | |
1871 | "application registered claiming [ pid: %d, ppid: %d, uid: %u, gid: %u ]", | |
9f327dfe | 1872 | xucred.cr_uid, xucred.cr_groups[0], |
4a07ff75 MD |
1873 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); |
1874 | *pid = reg_msg->pid; | |
1875 | *ppid = reg_msg->ppid; | |
9f327dfe | 1876 | *uid = xucred.cr_uid; |
4a07ff75 MD |
1877 | *gid = xucred.cr_groups[0]; |
1878 | return 0; | |
1879 | } | |
1880 | #else | |
1881 | #warning "Using insecure fallback: trusting user id provided by registered applications. Please consider implementing use of unix socket credentials on your platform." | |
1882 | static | |
1883 | int get_cred(int sock, | |
1884 | const struct ustctl_reg_msg *reg_msg, | |
1885 | uint32_t *pid, | |
1886 | uint32_t *ppid, | |
1887 | uint32_t *uid, | |
1888 | uint32_t *gid) | |
1889 | { | |
1890 | DBG("Application registered claiming [ pid: %u, ppid: %d, uid: %u, gid: %u ]", | |
1891 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); | |
1892 | *pid = reg_msg->pid; | |
1893 | *ppid = reg_msg->ppid; | |
1894 | *uid = reg_msg->uid; | |
1895 | *gid = reg_msg->gid; | |
1896 | return 0; | |
1897 | } | |
1898 | #endif | |
1899 | ||
32ce8569 MD |
1900 | /* |
1901 | * Returns 0 on success, negative error value on error. | |
1902 | */ | |
1903 | int ustctl_recv_reg_msg(int sock, | |
1904 | enum ustctl_socket_type *type, | |
1905 | uint32_t *major, | |
1906 | uint32_t *minor, | |
1907 | uint32_t *pid, | |
1908 | uint32_t *ppid, | |
1909 | uint32_t *uid, | |
1910 | uint32_t *gid, | |
1911 | uint32_t *bits_per_long, | |
1912 | uint32_t *uint8_t_alignment, | |
1913 | uint32_t *uint16_t_alignment, | |
1914 | uint32_t *uint32_t_alignment, | |
1915 | uint32_t *uint64_t_alignment, | |
1916 | uint32_t *long_alignment, | |
1917 | int *byte_order, | |
1918 | char *name) | |
1919 | { | |
1920 | ssize_t len; | |
1921 | struct ustctl_reg_msg reg_msg; | |
1922 | ||
1923 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
1924 | if (len > 0 && len != sizeof(reg_msg)) | |
1925 | return -EIO; | |
1926 | if (len == 0) | |
1927 | return -EPIPE; | |
1928 | if (len < 0) | |
1929 | return len; | |
1930 | ||
1931 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
1932 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1933 | BIG_ENDIAN : LITTLE_ENDIAN; | |
1934 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
1935 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
1936 | LITTLE_ENDIAN : BIG_ENDIAN; | |
1937 | } else { | |
1938 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
1939 | } | |
1940 | switch (reg_msg.socket_type) { | |
1941 | case 0: *type = USTCTL_SOCKET_CMD; | |
1942 | break; | |
1943 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
1944 | break; | |
1945 | default: | |
1946 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
1947 | } | |
1948 | *major = reg_msg.major; | |
1949 | *minor = reg_msg.minor; | |
32ce8569 MD |
1950 | *bits_per_long = reg_msg.bits_per_long; |
1951 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
1952 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
1953 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
1954 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
1955 | *long_alignment = reg_msg.long_alignment; | |
1956 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
1957 | if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) { | |
1958 | return -LTTNG_UST_ERR_UNSUP_MAJOR; | |
1959 | } | |
4a07ff75 | 1960 | return get_cred(sock, ®_msg, pid, ppid, uid, gid); |
32ce8569 MD |
1961 | } |
1962 | ||
1963 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
1964 | { | |
1965 | struct ustcomm_notify_hdr header; | |
1966 | ssize_t len; | |
1967 | ||
1968 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
1969 | if (len > 0 && len != sizeof(header)) | |
1970 | return -EIO; | |
1971 | if (len == 0) | |
1972 | return -EPIPE; | |
1973 | if (len < 0) | |
1974 | return len; | |
1975 | switch (header.notify_cmd) { | |
1976 | case 0: | |
1977 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1978 | break; | |
1979 | case 1: | |
1980 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1981 | break; | |
c785c634 MD |
1982 | case 2: |
1983 | *notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1984 | break; | |
32ce8569 MD |
1985 | default: |
1986 | return -EINVAL; | |
1987 | } | |
1988 | return 0; | |
1989 | } | |
1990 | ||
1991 | /* | |
1992 | * Returns 0 on success, negative error value on error. | |
1993 | */ | |
1994 | int ustctl_recv_register_event(int sock, | |
1995 | int *session_objd, | |
1996 | int *channel_objd, | |
1997 | char *event_name, | |
1998 | int *loglevel, | |
1999 | char **signature, | |
2000 | size_t *nr_fields, | |
2001 | struct ustctl_field **fields, | |
2002 | char **model_emf_uri) | |
2003 | { | |
2004 | ssize_t len; | |
2005 | struct ustcomm_notify_event_msg msg; | |
2006 | size_t signature_len, fields_len, model_emf_uri_len; | |
2007 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
2008 | struct ustctl_field *a_fields = NULL; | |
2009 | ||
2010 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2011 | if (len > 0 && len != sizeof(msg)) | |
2012 | return -EIO; | |
2013 | if (len == 0) | |
2014 | return -EPIPE; | |
2015 | if (len < 0) | |
2016 | return len; | |
2017 | ||
2018 | *session_objd = msg.session_objd; | |
2019 | *channel_objd = msg.channel_objd; | |
2020 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
2021 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2022 | *loglevel = msg.loglevel; | |
2023 | signature_len = msg.signature_len; | |
2024 | fields_len = msg.fields_len; | |
2025 | ||
2026 | if (fields_len % sizeof(*a_fields) != 0) { | |
2027 | return -EINVAL; | |
2028 | } | |
2029 | ||
2030 | model_emf_uri_len = msg.model_emf_uri_len; | |
2031 | ||
2032 | /* recv signature. contains at least \0. */ | |
2033 | a_sign = zmalloc(signature_len); | |
2034 | if (!a_sign) | |
2035 | return -ENOMEM; | |
2036 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
2037 | if (len > 0 && len != signature_len) { | |
2038 | len = -EIO; | |
2039 | goto signature_error; | |
2040 | } | |
2041 | if (len == 0) { | |
2042 | len = -EPIPE; | |
2043 | goto signature_error; | |
2044 | } | |
2045 | if (len < 0) { | |
2046 | goto signature_error; | |
2047 | } | |
2048 | /* Enforce end of string */ | |
111198c2 | 2049 | a_sign[signature_len - 1] = '\0'; |
32ce8569 MD |
2050 | |
2051 | /* recv fields */ | |
2052 | if (fields_len) { | |
2053 | a_fields = zmalloc(fields_len); | |
2054 | if (!a_fields) { | |
2055 | len = -ENOMEM; | |
2056 | goto signature_error; | |
2057 | } | |
2058 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2059 | if (len > 0 && len != fields_len) { | |
2060 | len = -EIO; | |
2061 | goto fields_error; | |
2062 | } | |
2063 | if (len == 0) { | |
2064 | len = -EPIPE; | |
2065 | goto fields_error; | |
2066 | } | |
2067 | if (len < 0) { | |
2068 | goto fields_error; | |
2069 | } | |
2070 | } | |
2071 | ||
2072 | if (model_emf_uri_len) { | |
2073 | /* recv model_emf_uri_len */ | |
2074 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
2075 | if (!a_model_emf_uri) { | |
2076 | len = -ENOMEM; | |
2077 | goto fields_error; | |
2078 | } | |
2079 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
2080 | model_emf_uri_len); | |
2081 | if (len > 0 && len != model_emf_uri_len) { | |
2082 | len = -EIO; | |
2083 | goto model_error; | |
2084 | } | |
2085 | if (len == 0) { | |
2086 | len = -EPIPE; | |
2087 | goto model_error; | |
2088 | } | |
2089 | if (len < 0) { | |
2090 | goto model_error; | |
2091 | } | |
2092 | /* Enforce end of string */ | |
2093 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
2094 | } | |
2095 | ||
2096 | *signature = a_sign; | |
2097 | *nr_fields = fields_len / sizeof(*a_fields); | |
2098 | *fields = a_fields; | |
2099 | *model_emf_uri = a_model_emf_uri; | |
2100 | ||
2101 | return 0; | |
2102 | ||
2103 | model_error: | |
2104 | free(a_model_emf_uri); | |
2105 | fields_error: | |
2106 | free(a_fields); | |
2107 | signature_error: | |
2108 | free(a_sign); | |
2109 | return len; | |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * Returns 0 on success, negative error value on error. | |
2114 | */ | |
2115 | int ustctl_reply_register_event(int sock, | |
2116 | uint32_t id, | |
2117 | int ret_code) | |
2118 | { | |
2119 | ssize_t len; | |
2120 | struct { | |
2121 | struct ustcomm_notify_hdr header; | |
2122 | struct ustcomm_notify_event_reply r; | |
2123 | } reply; | |
2124 | ||
2125 | memset(&reply, 0, sizeof(reply)); | |
2126 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
2127 | reply.r.ret_code = ret_code; | |
2128 | reply.r.event_id = id; | |
2129 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2130 | if (len > 0 && len != sizeof(reply)) | |
2131 | return -EIO; | |
2132 | if (len < 0) | |
2133 | return len; | |
2134 | return 0; | |
2135 | } | |
2136 | ||
c785c634 MD |
2137 | /* |
2138 | * Returns 0 on success, negative UST or system error value on error. | |
2139 | */ | |
2140 | int ustctl_recv_register_enum(int sock, | |
2141 | int *session_objd, | |
2142 | char *enum_name, | |
2143 | struct ustctl_enum_entry **entries, | |
2144 | size_t *nr_entries) | |
2145 | { | |
2146 | ssize_t len; | |
2147 | struct ustcomm_notify_enum_msg msg; | |
2148 | size_t entries_len; | |
2149 | struct ustctl_enum_entry *a_entries = NULL; | |
2150 | ||
2151 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2152 | if (len > 0 && len != sizeof(msg)) | |
2153 | return -EIO; | |
2154 | if (len == 0) | |
2155 | return -EPIPE; | |
2156 | if (len < 0) | |
2157 | return len; | |
2158 | ||
2159 | *session_objd = msg.session_objd; | |
2160 | strncpy(enum_name, msg.enum_name, LTTNG_UST_SYM_NAME_LEN); | |
2161 | enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2162 | entries_len = msg.entries_len; | |
2163 | ||
2164 | if (entries_len % sizeof(*a_entries) != 0) { | |
2165 | return -EINVAL; | |
2166 | } | |
2167 | ||
2168 | /* recv entries */ | |
2169 | if (entries_len) { | |
2170 | a_entries = zmalloc(entries_len); | |
2171 | if (!a_entries) | |
2172 | return -ENOMEM; | |
2173 | len = ustcomm_recv_unix_sock(sock, a_entries, entries_len); | |
2174 | if (len > 0 && len != entries_len) { | |
2175 | len = -EIO; | |
2176 | goto entries_error; | |
2177 | } | |
2178 | if (len == 0) { | |
2179 | len = -EPIPE; | |
2180 | goto entries_error; | |
2181 | } | |
2182 | if (len < 0) { | |
2183 | goto entries_error; | |
2184 | } | |
2185 | } | |
2186 | *nr_entries = entries_len / sizeof(*a_entries); | |
2187 | *entries = a_entries; | |
2188 | ||
2189 | return 0; | |
2190 | ||
2191 | entries_error: | |
2192 | free(a_entries); | |
2193 | return len; | |
2194 | } | |
2195 | ||
2196 | /* | |
2197 | * Returns 0 on success, negative error value on error. | |
2198 | */ | |
2199 | int ustctl_reply_register_enum(int sock, | |
2200 | uint64_t id, | |
2201 | int ret_code) | |
2202 | { | |
2203 | ssize_t len; | |
2204 | struct { | |
2205 | struct ustcomm_notify_hdr header; | |
2206 | struct ustcomm_notify_enum_reply r; | |
2207 | } reply; | |
2208 | ||
2209 | memset(&reply, 0, sizeof(reply)); | |
2210 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
2211 | reply.r.ret_code = ret_code; | |
2212 | reply.r.enum_id = id; | |
2213 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2214 | if (len > 0 && len != sizeof(reply)) | |
2215 | return -EIO; | |
2216 | if (len < 0) | |
2217 | return len; | |
2218 | return 0; | |
2219 | } | |
2220 | ||
32ce8569 MD |
2221 | /* |
2222 | * Returns 0 on success, negative UST or system error value on error. | |
2223 | */ | |
2224 | int ustctl_recv_register_channel(int sock, | |
2225 | int *session_objd, /* session descriptor (output) */ | |
2226 | int *channel_objd, /* channel descriptor (output) */ | |
2227 | size_t *nr_fields, | |
2228 | struct ustctl_field **fields) | |
2229 | { | |
2230 | ssize_t len; | |
2231 | struct ustcomm_notify_channel_msg msg; | |
2232 | size_t fields_len; | |
2233 | struct ustctl_field *a_fields; | |
2234 | ||
2235 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2236 | if (len > 0 && len != sizeof(msg)) | |
2237 | return -EIO; | |
2238 | if (len == 0) | |
2239 | return -EPIPE; | |
2240 | if (len < 0) | |
2241 | return len; | |
2242 | ||
2243 | *session_objd = msg.session_objd; | |
2244 | *channel_objd = msg.channel_objd; | |
2245 | fields_len = msg.ctx_fields_len; | |
2246 | ||
2247 | if (fields_len % sizeof(*a_fields) != 0) { | |
2248 | return -EINVAL; | |
2249 | } | |
2250 | ||
2251 | /* recv fields */ | |
2252 | if (fields_len) { | |
2253 | a_fields = zmalloc(fields_len); | |
2254 | if (!a_fields) { | |
2255 | len = -ENOMEM; | |
2256 | goto alloc_error; | |
2257 | } | |
2258 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2259 | if (len > 0 && len != fields_len) { | |
2260 | len = -EIO; | |
2261 | goto fields_error; | |
2262 | } | |
2263 | if (len == 0) { | |
2264 | len = -EPIPE; | |
2265 | goto fields_error; | |
2266 | } | |
2267 | if (len < 0) { | |
2268 | goto fields_error; | |
2269 | } | |
2270 | *fields = a_fields; | |
2271 | } else { | |
2272 | *fields = NULL; | |
2273 | } | |
2274 | *nr_fields = fields_len / sizeof(*a_fields); | |
2275 | return 0; | |
2276 | ||
2277 | fields_error: | |
2278 | free(a_fields); | |
2279 | alloc_error: | |
2280 | return len; | |
2281 | } | |
2282 | ||
2283 | /* | |
2284 | * Returns 0 on success, negative error value on error. | |
2285 | */ | |
2286 | int ustctl_reply_register_channel(int sock, | |
2287 | uint32_t chan_id, | |
2288 | enum ustctl_channel_header header_type, | |
2289 | int ret_code) | |
2290 | { | |
2291 | ssize_t len; | |
2292 | struct { | |
2293 | struct ustcomm_notify_hdr header; | |
2294 | struct ustcomm_notify_channel_reply r; | |
2295 | } reply; | |
2296 | ||
2297 | memset(&reply, 0, sizeof(reply)); | |
2298 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
2299 | reply.r.ret_code = ret_code; | |
2300 | reply.r.chan_id = chan_id; | |
2301 | switch (header_type) { | |
2302 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
2303 | reply.r.header_type = 1; | |
2304 | break; | |
2305 | case USTCTL_CHANNEL_HEADER_LARGE: | |
2306 | reply.r.header_type = 2; | |
2307 | break; | |
2308 | default: | |
2309 | reply.r.header_type = 0; | |
2310 | break; | |
2311 | } | |
2312 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2313 | if (len > 0 && len != sizeof(reply)) | |
2314 | return -EIO; | |
2315 | if (len < 0) | |
2316 | return len; | |
2317 | return 0; | |
2318 | } | |
2319 | ||
f53329f3 JD |
2320 | /* Regenerate the statedump. */ |
2321 | int ustctl_regenerate_statedump(int sock, int handle) | |
2322 | { | |
2323 | struct ustcomm_ust_msg lum; | |
2324 | struct ustcomm_ust_reply lur; | |
2325 | int ret; | |
2326 | ||
2327 | memset(&lum, 0, sizeof(lum)); | |
2328 | lum.handle = handle; | |
2329 | lum.cmd = LTTNG_UST_SESSION_STATEDUMP; | |
2330 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
2331 | if (ret) | |
2332 | return ret; | |
2333 | DBG("Regenerated statedump for handle %u", handle); | |
2334 | return 0; | |
2335 | } | |
2336 | ||
74d81a6c MD |
2337 | static __attribute__((constructor)) |
2338 | void ustctl_init(void) | |
2339 | { | |
2340 | init_usterr(); | |
6f626d28 | 2341 | lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */ |
f9364363 | 2342 | lttng_ust_clock_init(); |
74d81a6c MD |
2343 | lttng_ring_buffer_metadata_client_init(); |
2344 | lttng_ring_buffer_client_overwrite_init(); | |
34a91bdb | 2345 | lttng_ring_buffer_client_overwrite_rt_init(); |
74d81a6c | 2346 | lttng_ring_buffer_client_discard_init(); |
34a91bdb | 2347 | lttng_ring_buffer_client_discard_rt_init(); |
03d2d293 | 2348 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
2349 | } |
2350 | ||
2351 | static __attribute__((destructor)) | |
2352 | void ustctl_exit(void) | |
2353 | { | |
34a91bdb | 2354 | lttng_ring_buffer_client_discard_rt_exit(); |
74d81a6c | 2355 | lttng_ring_buffer_client_discard_exit(); |
34a91bdb | 2356 | lttng_ring_buffer_client_overwrite_rt_exit(); |
74d81a6c MD |
2357 | lttng_ring_buffer_client_overwrite_exit(); |
2358 | lttng_ring_buffer_metadata_client_exit(); | |
57773204 | 2359 | } |