Commit | Line | Data |
---|---|---|
57773204 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
74d81a6c | 3 | * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
57773204 | 4 | * |
e92f3e28 MD |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; version 2 of the License only. | |
57773204 MD |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
e92f3e28 MD |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
57773204 MD |
17 | */ |
18 | ||
fb31eb73 | 19 | #include <stdint.h> |
57773204 | 20 | #include <string.h> |
fb31eb73 | 21 | #include <sys/mman.h> |
4e79769f | 22 | #include <unistd.h> |
a834901f MD |
23 | #include <sys/types.h> |
24 | #include <sys/socket.h> | |
fb31eb73 | 25 | |
c62a3816 | 26 | #include <lttng/ust-config.h> |
4318ae1b MD |
27 | #include <lttng/ust-ctl.h> |
28 | #include <lttng/ust-abi.h> | |
c1fca457 | 29 | #include <lttng/ust-events.h> |
3208818b | 30 | #include <lttng/ust-endian.h> |
44c72f10 | 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" |
23d128de | 41 | #include "../liblttng-ust/lttng-tracer-core.h" |
c9023c93 | 42 | |
ebabbf58 MD |
43 | #include "../libcounter/shm.h" |
44 | #include "../libcounter/smp.h" | |
45 | #include "../libcounter/counter.h" | |
46 | ||
c9023c93 MD |
47 | /* |
48 | * Number of milliseconds to retry before failing metadata writes on | |
49 | * buffer full condition. (10 seconds) | |
50 | */ | |
51 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 | |
57773204 | 52 | |
74d81a6c MD |
53 | /* |
54 | * Channel representation within consumer. | |
55 | */ | |
56 | struct ustctl_consumer_channel { | |
57 | struct lttng_channel *chan; /* lttng channel buffers */ | |
6b120308 | 58 | |
74d81a6c MD |
59 | /* initial attributes */ |
60 | struct ustctl_consumer_channel_attr attr; | |
ff0f5728 MD |
61 | int wait_fd; /* monitor close() */ |
62 | int wakeup_fd; /* monitor close() */ | |
74d81a6c MD |
63 | }; |
64 | ||
65 | /* | |
66 | * Stream representation within consumer. | |
67 | */ | |
68 | struct ustctl_consumer_stream { | |
69 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ | |
70 | struct lttng_ust_lib_ring_buffer *buf; | |
71 | struct ustctl_consumer_channel *chan; | |
72 | int shm_fd, wait_fd, wakeup_fd; | |
73 | int cpu; | |
74 | uint64_t memory_map_size; | |
75 | }; | |
76 | ||
ebabbf58 MD |
77 | #define USTCTL_COUNTER_ATTR_DIMENSION_MAX 8 |
78 | struct ustctl_counter_attr { | |
79 | enum ustctl_counter_arithmetic arithmetic; | |
80 | enum ustctl_counter_bitness bitness; | |
81 | uint32_t nr_dimensions; | |
82 | int64_t global_sum_step; | |
83 | struct ustctl_counter_dimension dimensions[USTCTL_COUNTER_ATTR_DIMENSION_MAX]; | |
84 | }; | |
85 | ||
86 | /* | |
87 | * Counter representation within daemon. | |
88 | */ | |
89 | struct ustctl_daemon_counter { | |
90 | struct lib_counter *counter; | |
91 | const struct lttng_counter_ops *ops; | |
92 | struct ustctl_counter_attr *attr; /* initial attributes */ | |
93 | }; | |
94 | ||
74d81a6c | 95 | extern void lttng_ring_buffer_client_overwrite_init(void); |
08a3170c | 96 | extern void lttng_ring_buffer_client_overwrite_rt_init(void); |
74d81a6c | 97 | extern void lttng_ring_buffer_client_discard_init(void); |
08a3170c | 98 | extern void lttng_ring_buffer_client_discard_rt_init(void); |
74d81a6c MD |
99 | extern void lttng_ring_buffer_metadata_client_init(void); |
100 | extern void lttng_ring_buffer_client_overwrite_exit(void); | |
08a3170c | 101 | extern void lttng_ring_buffer_client_overwrite_rt_exit(void); |
74d81a6c | 102 | extern void lttng_ring_buffer_client_discard_exit(void); |
08a3170c | 103 | extern void lttng_ring_buffer_client_discard_rt_exit(void); |
74d81a6c | 104 | extern void lttng_ring_buffer_metadata_client_exit(void); |
31677417 | 105 | LTTNG_HIDDEN |
ebabbf58 | 106 | extern void lttng_counter_client_percpu_32_modular_init(void); |
31677417 | 107 | LTTNG_HIDDEN |
ebabbf58 | 108 | extern void lttng_counter_client_percpu_32_modular_exit(void); |
31677417 | 109 | LTTNG_HIDDEN |
ebabbf58 | 110 | extern void lttng_counter_client_percpu_64_modular_init(void); |
31677417 | 111 | LTTNG_HIDDEN |
ebabbf58 | 112 | extern void lttng_counter_client_percpu_64_modular_exit(void); |
74d81a6c | 113 | |
2be0e72c MD |
114 | int ustctl_release_handle(int sock, int handle) |
115 | { | |
116 | struct ustcomm_ust_msg lum; | |
117 | struct ustcomm_ust_reply lur; | |
2be0e72c | 118 | |
74d81a6c MD |
119 | if (sock < 0 || handle < 0) |
120 | return 0; | |
121 | memset(&lum, 0, sizeof(lum)); | |
122 | lum.handle = handle; | |
123 | lum.cmd = LTTNG_UST_RELEASE; | |
124 | return ustcomm_send_app_cmd(sock, &lum, &lur); | |
2be0e72c | 125 | } |
74d81a6c | 126 | |
12388166 MD |
127 | /* |
128 | * If sock is negative, it means we don't have to notify the other side | |
129 | * (e.g. application has already vanished). | |
130 | */ | |
d26228ae | 131 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
57773204 | 132 | { |
57773204 MD |
133 | int ret; |
134 | ||
9bfc503d MD |
135 | if (!data) |
136 | return -EINVAL; | |
137 | ||
74d81a6c MD |
138 | switch (data->type) { |
139 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
ff0f5728 MD |
140 | if (data->u.channel.wakeup_fd >= 0) { |
141 | ret = close(data->u.channel.wakeup_fd); | |
142 | if (ret < 0) { | |
143 | ret = -errno; | |
144 | return ret; | |
145 | } | |
dd6c697c | 146 | data->u.channel.wakeup_fd = -1; |
ff0f5728 | 147 | } |
74d81a6c | 148 | free(data->u.channel.data); |
dd6c697c | 149 | data->u.channel.data = NULL; |
74d81a6c MD |
150 | break; |
151 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
152 | if (data->u.stream.shm_fd >= 0) { | |
153 | ret = close(data->u.stream.shm_fd); | |
154 | if (ret < 0) { | |
155 | ret = -errno; | |
156 | return ret; | |
157 | } | |
dd6c697c | 158 | data->u.stream.shm_fd = -1; |
d26228ae | 159 | } |
74d81a6c MD |
160 | if (data->u.stream.wakeup_fd >= 0) { |
161 | ret = close(data->u.stream.wakeup_fd); | |
162 | if (ret < 0) { | |
163 | ret = -errno; | |
164 | return ret; | |
165 | } | |
dd6c697c | 166 | data->u.stream.wakeup_fd = -1; |
d26228ae | 167 | } |
74d81a6c | 168 | break; |
32ce8569 MD |
169 | case LTTNG_UST_OBJECT_TYPE_EVENT: |
170 | case LTTNG_UST_OBJECT_TYPE_CONTEXT: | |
d8d2416d FD |
171 | case LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP: |
172 | case LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER: | |
32ce8569 | 173 | break; |
ebabbf58 MD |
174 | case LTTNG_UST_OBJECT_TYPE_COUNTER: |
175 | free(data->u.counter.data); | |
176 | data->u.counter.data = NULL; | |
177 | break; | |
178 | case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL: | |
179 | if (data->u.counter_global.shm_fd >= 0) { | |
180 | ret = close(data->u.counter_global.shm_fd); | |
181 | if (ret < 0) { | |
182 | ret = -errno; | |
183 | return ret; | |
184 | } | |
185 | data->u.counter_global.shm_fd = -1; | |
186 | } | |
187 | break; | |
188 | case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU: | |
189 | if (data->u.counter_cpu.shm_fd >= 0) { | |
190 | ret = close(data->u.counter_cpu.shm_fd); | |
191 | if (ret < 0) { | |
192 | ret = -errno; | |
193 | return ret; | |
194 | } | |
195 | data->u.counter_cpu.shm_fd = -1; | |
196 | } | |
197 | break; | |
74d81a6c MD |
198 | default: |
199 | assert(0); | |
d26228ae | 200 | } |
2be0e72c | 201 | return ustctl_release_handle(sock, data->handle); |
57773204 MD |
202 | } |
203 | ||
1c5e467e MD |
204 | /* |
205 | * Send registration done packet to the application. | |
206 | */ | |
207 | int ustctl_register_done(int sock) | |
208 | { | |
209 | struct ustcomm_ust_msg lum; | |
210 | struct ustcomm_ust_reply lur; | |
211 | int ret; | |
212 | ||
213 | DBG("Sending register done command to %d", sock); | |
214 | memset(&lum, 0, sizeof(lum)); | |
215 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
216 | lum.cmd = LTTNG_UST_REGISTER_DONE; | |
217 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
218 | if (ret) | |
219 | return ret; | |
1c5e467e | 220 | return 0; |
1c5e467e MD |
221 | } |
222 | ||
57773204 MD |
223 | /* |
224 | * returns session handle. | |
225 | */ | |
226 | int ustctl_create_session(int sock) | |
227 | { | |
228 | struct ustcomm_ust_msg lum; | |
229 | struct ustcomm_ust_reply lur; | |
230 | int ret, session_handle; | |
231 | ||
232 | /* Create session */ | |
233 | memset(&lum, 0, sizeof(lum)); | |
234 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
235 | lum.cmd = LTTNG_UST_SESSION; | |
236 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
237 | if (ret) | |
238 | return ret; | |
239 | session_handle = lur.ret_val; | |
240 | DBG("received session handle %u", session_handle); | |
241 | return session_handle; | |
242 | } | |
243 | ||
57773204 | 244 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
245 | struct lttng_ust_object_data *channel_data, |
246 | struct lttng_ust_object_data **_event_data) | |
57773204 MD |
247 | { |
248 | struct ustcomm_ust_msg lum; | |
249 | struct ustcomm_ust_reply lur; | |
61f02aea | 250 | struct lttng_ust_object_data *event_data; |
57773204 MD |
251 | int ret; |
252 | ||
9bfc503d MD |
253 | if (!channel_data || !_event_data) |
254 | return -EINVAL; | |
255 | ||
74d81a6c | 256 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
257 | if (!event_data) |
258 | return -ENOMEM; | |
32ce8569 | 259 | event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT; |
57773204 MD |
260 | memset(&lum, 0, sizeof(lum)); |
261 | lum.handle = channel_data->handle; | |
262 | lum.cmd = LTTNG_UST_EVENT; | |
263 | strncpy(lum.u.event.name, ev->name, | |
264 | LTTNG_UST_SYM_NAME_LEN); | |
265 | lum.u.event.instrumentation = ev->instrumentation; | |
457a6b58 MD |
266 | lum.u.event.loglevel_type = ev->loglevel_type; |
267 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
268 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
269 | if (ret) { | |
270 | free(event_data); | |
271 | return ret; | |
272 | } | |
273 | event_data->handle = lur.ret_val; | |
274 | DBG("received event handle %u", event_data->handle); | |
275 | *_event_data = event_data; | |
276 | return 0; | |
277 | } | |
278 | ||
53f0df51 | 279 | int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
61f02aea MD |
280 | struct lttng_ust_object_data *obj_data, |
281 | struct lttng_ust_object_data **_context_data) | |
57773204 MD |
282 | { |
283 | struct ustcomm_ust_msg lum; | |
284 | struct ustcomm_ust_reply lur; | |
53f0df51 JG |
285 | struct lttng_ust_object_data *context_data = NULL; |
286 | char *buf = NULL; | |
287 | size_t len; | |
57773204 MD |
288 | int ret; |
289 | ||
53f0df51 JG |
290 | if (!obj_data || !_context_data) { |
291 | ret = -EINVAL; | |
292 | goto end; | |
293 | } | |
9bfc503d | 294 | |
74d81a6c | 295 | context_data = zmalloc(sizeof(*context_data)); |
53f0df51 JG |
296 | if (!context_data) { |
297 | ret = -ENOMEM; | |
298 | goto end; | |
299 | } | |
32ce8569 | 300 | context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT; |
57773204 | 301 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 302 | lum.handle = obj_data->handle; |
57773204 | 303 | lum.cmd = LTTNG_UST_CONTEXT; |
53f0df51 JG |
304 | |
305 | lum.u.context.ctx = ctx->ctx; | |
306 | switch (ctx->ctx) { | |
307 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
308 | lum.u.context.u.perf_counter = ctx->u.perf_counter; | |
309 | break; | |
310 | case LTTNG_UST_CONTEXT_APP_CONTEXT: | |
311 | { | |
312 | size_t provider_name_len = strlen( | |
313 | ctx->u.app_ctx.provider_name) + 1; | |
314 | size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1; | |
315 | ||
316 | lum.u.context.u.app_ctx.provider_name_len = provider_name_len; | |
317 | lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len; | |
318 | ||
319 | len = provider_name_len + ctx_name_len; | |
320 | buf = zmalloc(len); | |
321 | if (!buf) { | |
322 | ret = -ENOMEM; | |
323 | goto end; | |
324 | } | |
325 | memcpy(buf, ctx->u.app_ctx.provider_name, | |
326 | provider_name_len); | |
327 | memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name, | |
328 | ctx_name_len); | |
329 | break; | |
330 | } | |
331 | default: | |
332 | break; | |
333 | } | |
334 | ret = ustcomm_send_app_msg(sock, &lum); | |
335 | if (ret) | |
336 | goto end; | |
337 | if (buf) { | |
338 | /* send var len ctx_name */ | |
339 | ret = ustcomm_send_unix_sock(sock, buf, len); | |
340 | if (ret < 0) { | |
341 | goto end; | |
342 | } | |
343 | if (ret != len) { | |
344 | ret = -EINVAL; | |
345 | goto end; | |
346 | } | |
347 | } | |
348 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
349 | if (ret < 0) { | |
350 | goto end; | |
57773204 | 351 | } |
32ce8569 MD |
352 | context_data->handle = -1; |
353 | DBG("Context created successfully"); | |
57773204 | 354 | *_context_data = context_data; |
53f0df51 JG |
355 | context_data = NULL; |
356 | end: | |
357 | free(context_data); | |
358 | free(buf); | |
57773204 MD |
359 | return ret; |
360 | } | |
361 | ||
cd54f6d9 MD |
362 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
363 | struct lttng_ust_object_data *obj_data) | |
364 | { | |
365 | struct ustcomm_ust_msg lum; | |
366 | struct ustcomm_ust_reply lur; | |
367 | int ret; | |
368 | ||
369 | if (!obj_data) | |
370 | return -EINVAL; | |
371 | ||
372 | memset(&lum, 0, sizeof(lum)); | |
373 | lum.handle = obj_data->handle; | |
374 | lum.cmd = LTTNG_UST_FILTER; | |
375 | lum.u.filter.data_size = bytecode->len; | |
376 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 377 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
378 | |
379 | ret = ustcomm_send_app_msg(sock, &lum); | |
d37ecb3f FD |
380 | if (ret) |
381 | return ret; | |
382 | /* send var len bytecode */ | |
383 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
384 | bytecode->len); | |
385 | if (ret < 0) { | |
386 | return ret; | |
387 | } | |
388 | if (ret != bytecode->len) | |
389 | return -EINVAL; | |
390 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
391 | } | |
392 | ||
393 | int ustctl_set_capture(int sock, struct lttng_ust_capture_bytecode *bytecode, | |
394 | struct lttng_ust_object_data *obj_data) | |
395 | { | |
396 | struct ustcomm_ust_msg lum; | |
397 | struct ustcomm_ust_reply lur; | |
398 | int ret; | |
399 | ||
400 | if (!obj_data) | |
401 | return -EINVAL; | |
402 | ||
403 | memset(&lum, 0, sizeof(lum)); | |
404 | lum.handle = obj_data->handle; | |
405 | lum.cmd = LTTNG_UST_CAPTURE; | |
406 | lum.u.capture.data_size = bytecode->len; | |
407 | lum.u.capture.reloc_offset = bytecode->reloc_offset; | |
408 | lum.u.capture.seqnum = bytecode->seqnum; | |
409 | ||
410 | ret = ustcomm_send_app_msg(sock, &lum); | |
cd54f6d9 MD |
411 | if (ret) |
412 | return ret; | |
cd54f6d9 MD |
413 | /* send var len bytecode */ |
414 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
415 | bytecode->len); | |
416 | if (ret < 0) { | |
417 | return ret; | |
418 | } | |
7bc53e94 MD |
419 | if (ret != bytecode->len) |
420 | return -EINVAL; | |
421 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
422 | } |
423 | ||
da57c034 JI |
424 | int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion, |
425 | struct lttng_ust_object_data *obj_data) | |
426 | { | |
427 | struct ustcomm_ust_msg lum; | |
428 | struct ustcomm_ust_reply lur; | |
429 | int ret; | |
430 | ||
431 | if (!obj_data) { | |
432 | return -EINVAL; | |
433 | } | |
434 | ||
435 | memset(&lum, 0, sizeof(lum)); | |
436 | lum.handle = obj_data->handle; | |
437 | lum.cmd = LTTNG_UST_EXCLUSION; | |
438 | lum.u.exclusion.count = exclusion->count; | |
439 | ||
440 | ret = ustcomm_send_app_msg(sock, &lum); | |
441 | if (ret) { | |
442 | return ret; | |
443 | } | |
444 | ||
1628366f | 445 | /* send var len exclusion names */ |
da57c034 JI |
446 | ret = ustcomm_send_unix_sock(sock, |
447 | exclusion->names, | |
448 | exclusion->count * LTTNG_UST_SYM_NAME_LEN); | |
449 | if (ret < 0) { | |
450 | return ret; | |
451 | } | |
452 | if (ret != exclusion->count * LTTNG_UST_SYM_NAME_LEN) { | |
453 | return -EINVAL; | |
454 | } | |
455 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
456 | } | |
457 | ||
57773204 | 458 | /* Enable event, channel and session ioctl */ |
61f02aea | 459 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
460 | { |
461 | struct ustcomm_ust_msg lum; | |
462 | struct ustcomm_ust_reply lur; | |
463 | int ret; | |
464 | ||
9bfc503d MD |
465 | if (!object) |
466 | return -EINVAL; | |
467 | ||
57773204 MD |
468 | memset(&lum, 0, sizeof(lum)); |
469 | lum.handle = object->handle; | |
470 | lum.cmd = LTTNG_UST_ENABLE; | |
471 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
472 | if (ret) | |
473 | return ret; | |
474 | DBG("enabled handle %u", object->handle); | |
475 | return 0; | |
476 | } | |
477 | ||
478 | /* Disable event, channel and session ioctl */ | |
61f02aea | 479 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
57773204 MD |
480 | { |
481 | struct ustcomm_ust_msg lum; | |
482 | struct ustcomm_ust_reply lur; | |
483 | int ret; | |
484 | ||
9bfc503d MD |
485 | if (!object) |
486 | return -EINVAL; | |
487 | ||
57773204 MD |
488 | memset(&lum, 0, sizeof(lum)); |
489 | lum.handle = object->handle; | |
490 | lum.cmd = LTTNG_UST_DISABLE; | |
491 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
492 | if (ret) | |
493 | return ret; | |
494 | DBG("disable handle %u", object->handle); | |
495 | return 0; | |
496 | } | |
497 | ||
4a6ca058 | 498 | int ustctl_start_session(int sock, int handle) |
57773204 | 499 | { |
61f02aea | 500 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
501 | |
502 | obj.handle = handle; | |
503 | return ustctl_enable(sock, &obj); | |
57773204 MD |
504 | } |
505 | ||
4a6ca058 | 506 | int ustctl_stop_session(int sock, int handle) |
57773204 | 507 | { |
61f02aea | 508 | struct lttng_ust_object_data obj; |
4a6ca058 MD |
509 | |
510 | obj.handle = handle; | |
511 | return ustctl_disable(sock, &obj); | |
57773204 MD |
512 | } |
513 | ||
d8d2416d FD |
514 | int ustctl_create_event_notifier_group(int sock, int pipe_fd, |
515 | struct lttng_ust_object_data **_event_notifier_group_data) | |
516 | { | |
517 | struct lttng_ust_object_data *event_notifier_group_data; | |
518 | struct ustcomm_ust_msg lum; | |
519 | struct ustcomm_ust_reply lur; | |
520 | ssize_t len; | |
521 | int ret; | |
522 | ||
523 | if (!_event_notifier_group_data) | |
524 | return -EINVAL; | |
525 | ||
526 | event_notifier_group_data = zmalloc(sizeof(*event_notifier_group_data)); | |
527 | if (!event_notifier_group_data) | |
528 | return -ENOMEM; | |
529 | ||
530 | event_notifier_group_data->type = LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP; | |
531 | ||
532 | memset(&lum, 0, sizeof(lum)); | |
533 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
534 | lum.cmd = LTTNG_UST_EVENT_NOTIFIER_GROUP_CREATE; | |
535 | ||
536 | ret = ustcomm_send_app_msg(sock, &lum); | |
537 | if (ret) | |
538 | goto error; | |
539 | ||
540 | /* Send event_notifier notification pipe. */ | |
541 | len = ustcomm_send_fds_unix_sock(sock, &pipe_fd, 1); | |
542 | if (len <= 0) { | |
543 | ret = len; | |
544 | goto error; | |
545 | } | |
546 | ||
547 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
548 | if (ret) | |
549 | goto error; | |
550 | ||
551 | event_notifier_group_data->handle = lur.ret_val; | |
552 | DBG("received event_notifier group handle %d", event_notifier_group_data->handle); | |
553 | ||
554 | *_event_notifier_group_data = event_notifier_group_data; | |
555 | ||
556 | ret = 0; | |
557 | goto end; | |
558 | error: | |
559 | free(event_notifier_group_data); | |
560 | ||
561 | end: | |
562 | return ret; | |
563 | } | |
564 | ||
565 | int ustctl_create_event_notifier(int sock, struct lttng_ust_event_notifier *event_notifier, | |
566 | struct lttng_ust_object_data *event_notifier_group, | |
567 | struct lttng_ust_object_data **_event_notifier_data) | |
568 | { | |
569 | struct ustcomm_ust_msg lum; | |
570 | struct ustcomm_ust_reply lur; | |
571 | struct lttng_ust_object_data *event_notifier_data; | |
8406222c | 572 | ssize_t len; |
d8d2416d FD |
573 | int ret; |
574 | ||
575 | if (!event_notifier_group || !_event_notifier_data) | |
576 | return -EINVAL; | |
577 | ||
578 | event_notifier_data = zmalloc(sizeof(*event_notifier_data)); | |
579 | if (!event_notifier_data) | |
580 | return -ENOMEM; | |
581 | ||
582 | event_notifier_data->type = LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER; | |
583 | ||
584 | memset(&lum, 0, sizeof(lum)); | |
585 | lum.handle = event_notifier_group->handle; | |
586 | lum.cmd = LTTNG_UST_EVENT_NOTIFIER_CREATE; | |
8406222c | 587 | lum.u.event_notifier.len = sizeof(*event_notifier); |
d8d2416d | 588 | |
41844673 | 589 | ret = ustcomm_send_app_msg(sock, &lum); |
d8d2416d FD |
590 | if (ret) { |
591 | free(event_notifier_data); | |
592 | return ret; | |
593 | } | |
8406222c MD |
594 | /* Send struct lttng_ust_event_notifier */ |
595 | len = ustcomm_send_unix_sock(sock, event_notifier, sizeof(*event_notifier)); | |
596 | if (len != sizeof(*event_notifier)) { | |
597 | if (len < 0) | |
598 | return len; | |
599 | else | |
600 | return -EIO; | |
601 | } | |
41844673 MD |
602 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
603 | if (ret) { | |
604 | free(event_notifier_data); | |
605 | return ret; | |
606 | } | |
d8d2416d FD |
607 | event_notifier_data->handle = lur.ret_val; |
608 | DBG("received event_notifier handle %u", event_notifier_data->handle); | |
609 | *_event_notifier_data = event_notifier_data; | |
610 | ||
611 | return ret; | |
612 | } | |
613 | ||
57773204 MD |
614 | int ustctl_tracepoint_list(int sock) |
615 | { | |
b115631f MD |
616 | struct ustcomm_ust_msg lum; |
617 | struct ustcomm_ust_reply lur; | |
618 | int ret, tp_list_handle; | |
619 | ||
620 | memset(&lum, 0, sizeof(lum)); | |
621 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
622 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; | |
623 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
624 | if (ret) | |
625 | return ret; | |
626 | tp_list_handle = lur.ret_val; | |
627 | DBG("received tracepoint list handle %u", tp_list_handle); | |
628 | return tp_list_handle; | |
629 | } | |
630 | ||
631 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 632 | struct lttng_ust_tracepoint_iter *iter) |
b115631f MD |
633 | { |
634 | struct ustcomm_ust_msg lum; | |
635 | struct ustcomm_ust_reply lur; | |
636 | int ret; | |
637 | ||
9bfc503d MD |
638 | if (!iter) |
639 | return -EINVAL; | |
640 | ||
b115631f MD |
641 | memset(&lum, 0, sizeof(lum)); |
642 | lum.handle = tp_list_handle; | |
643 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; | |
644 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
645 | if (ret) | |
646 | return ret; | |
882a56d7 | 647 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 648 | lur.u.tracepoint.name, |
882a56d7 | 649 | lur.u.tracepoint.loglevel); |
cbef6901 | 650 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 651 | return 0; |
57773204 MD |
652 | } |
653 | ||
40003310 MD |
654 | int ustctl_tracepoint_field_list(int sock) |
655 | { | |
656 | struct ustcomm_ust_msg lum; | |
657 | struct ustcomm_ust_reply lur; | |
658 | int ret, tp_field_list_handle; | |
659 | ||
660 | memset(&lum, 0, sizeof(lum)); | |
661 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
662 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; | |
663 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
664 | if (ret) | |
665 | return ret; | |
666 | tp_field_list_handle = lur.ret_val; | |
667 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
668 | return tp_field_list_handle; | |
669 | } | |
670 | ||
671 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
672 | struct lttng_ust_field_iter *iter) | |
673 | { | |
674 | struct ustcomm_ust_msg lum; | |
675 | struct ustcomm_ust_reply lur; | |
676 | int ret; | |
677 | ssize_t len; | |
678 | ||
679 | if (!iter) | |
680 | return -EINVAL; | |
681 | ||
682 | memset(&lum, 0, sizeof(lum)); | |
683 | lum.handle = tp_field_list_handle; | |
684 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; | |
685 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
686 | if (ret) | |
687 | return ret; | |
688 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
689 | if (len != sizeof(*iter)) { | |
690 | return -EINVAL; | |
691 | } | |
692 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
693 | iter->event_name, | |
694 | iter->loglevel, | |
695 | iter->field_name, | |
696 | iter->type); | |
697 | return 0; | |
698 | } | |
699 | ||
57773204 MD |
700 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
701 | { | |
702 | struct ustcomm_ust_msg lum; | |
703 | struct ustcomm_ust_reply lur; | |
704 | int ret; | |
705 | ||
9bfc503d MD |
706 | if (!v) |
707 | return -EINVAL; | |
708 | ||
57773204 MD |
709 | memset(&lum, 0, sizeof(lum)); |
710 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
711 | lum.cmd = LTTNG_UST_TRACER_VERSION; | |
712 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
713 | if (ret) | |
714 | return ret; | |
715 | memcpy(v, &lur.u.version, sizeof(*v)); | |
716 | DBG("received tracer version"); | |
717 | return 0; | |
718 | } | |
719 | ||
720 | int ustctl_wait_quiescent(int sock) | |
721 | { | |
722 | struct ustcomm_ust_msg lum; | |
723 | struct ustcomm_ust_reply lur; | |
724 | int ret; | |
725 | ||
726 | memset(&lum, 0, sizeof(lum)); | |
727 | lum.handle = LTTNG_UST_ROOT_HANDLE; | |
728 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; | |
729 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
730 | if (ret) | |
731 | return ret; | |
732 | DBG("waited for quiescent state"); | |
733 | return 0; | |
734 | } | |
735 | ||
736 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) | |
737 | { | |
9bfc503d MD |
738 | if (!calibrate) |
739 | return -EINVAL; | |
740 | ||
57773204 MD |
741 | return -ENOSYS; |
742 | } | |
743 | ||
f1fffc57 MD |
744 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
745 | { | |
746 | struct ustcomm_ust_msg lum; | |
747 | struct ustcomm_ust_reply lur; | |
748 | int ret; | |
749 | ||
9bfc503d MD |
750 | if (!object) |
751 | return -EINVAL; | |
752 | ||
f1fffc57 MD |
753 | memset(&lum, 0, sizeof(lum)); |
754 | lum.handle = object->handle; | |
755 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; | |
756 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
757 | if (ret) | |
758 | return ret; | |
759 | DBG("flushed buffer handle %u", object->handle); | |
760 | return 0; | |
761 | } | |
762 | ||
74d81a6c MD |
763 | static |
764 | int ustctl_send_channel(int sock, | |
765 | enum lttng_ust_chan_type type, | |
766 | void *data, | |
767 | uint64_t size, | |
ff0f5728 | 768 | int wakeup_fd, |
74d81a6c MD |
769 | int send_fd_only) |
770 | { | |
771 | ssize_t len; | |
772 | ||
773 | if (!send_fd_only) { | |
774 | /* Send mmap size */ | |
775 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
776 | if (len != sizeof(size)) { | |
777 | if (len < 0) | |
778 | return len; | |
779 | else | |
780 | return -EIO; | |
781 | } | |
782 | ||
783 | /* Send channel type */ | |
784 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
785 | if (len != sizeof(type)) { | |
786 | if (len < 0) | |
787 | return len; | |
788 | else | |
789 | return -EIO; | |
790 | } | |
791 | } | |
792 | ||
793 | /* Send channel data */ | |
794 | len = ustcomm_send_unix_sock(sock, data, size); | |
795 | if (len != size) { | |
796 | if (len < 0) | |
797 | return len; | |
798 | else | |
799 | return -EIO; | |
800 | } | |
57773204 | 801 | |
ff0f5728 MD |
802 | /* Send wakeup fd */ |
803 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
804 | if (len <= 0) { | |
805 | if (len < 0) | |
806 | return len; | |
807 | else | |
808 | return -EIO; | |
809 | } | |
74d81a6c MD |
810 | return 0; |
811 | } | |
812 | ||
813 | static | |
814 | int ustctl_send_stream(int sock, | |
815 | uint32_t stream_nr, | |
816 | uint64_t memory_map_size, | |
817 | int shm_fd, int wakeup_fd, | |
818 | int send_fd_only) | |
57773204 | 819 | { |
74d81a6c MD |
820 | ssize_t len; |
821 | int fds[2]; | |
822 | ||
823 | if (!send_fd_only) { | |
824 | if (shm_fd < 0) { | |
825 | /* finish iteration */ | |
826 | uint64_t v = -1; | |
827 | ||
828 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
829 | if (len != sizeof(v)) { | |
830 | if (len < 0) | |
831 | return len; | |
832 | else | |
833 | return -EIO; | |
834 | } | |
835 | return 0; | |
836 | } | |
837 | ||
838 | /* Send mmap size */ | |
839 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
840 | sizeof(memory_map_size)); | |
841 | if (len != sizeof(memory_map_size)) { | |
842 | if (len < 0) | |
843 | return len; | |
844 | else | |
845 | return -EIO; | |
846 | } | |
847 | ||
848 | /* Send stream nr */ | |
849 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
850 | sizeof(stream_nr)); | |
851 | if (len != sizeof(stream_nr)) { | |
852 | if (len < 0) | |
853 | return len; | |
854 | else | |
855 | return -EIO; | |
856 | } | |
857 | } | |
858 | ||
859 | /* Send shm fd and wakeup fd */ | |
860 | fds[0] = shm_fd; | |
861 | fds[1] = wakeup_fd; | |
862 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
863 | if (len <= 0) { | |
864 | if (len < 0) | |
865 | return len; | |
866 | else | |
867 | return -EIO; | |
868 | } | |
869 | return 0; | |
870 | } | |
871 | ||
872 | int ustctl_recv_channel_from_consumer(int sock, | |
873 | struct lttng_ust_object_data **_channel_data) | |
874 | { | |
875 | struct lttng_ust_object_data *channel_data; | |
876 | ssize_t len; | |
ff0f5728 | 877 | int wakeup_fd; |
7a784989 | 878 | int ret; |
57773204 | 879 | |
74d81a6c MD |
880 | channel_data = zmalloc(sizeof(*channel_data)); |
881 | if (!channel_data) { | |
882 | ret = -ENOMEM; | |
883 | goto error_alloc; | |
884 | } | |
885 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; | |
12f3dabc | 886 | channel_data->handle = -1; |
74d81a6c MD |
887 | |
888 | /* recv mmap size */ | |
889 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
890 | sizeof(channel_data->size)); | |
891 | if (len != sizeof(channel_data->size)) { | |
892 | if (len < 0) | |
893 | ret = len; | |
894 | else | |
895 | ret = -EINVAL; | |
896 | goto error; | |
897 | } | |
9bfc503d | 898 | |
74d81a6c MD |
899 | /* recv channel type */ |
900 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
901 | sizeof(channel_data->u.channel.type)); | |
902 | if (len != sizeof(channel_data->u.channel.type)) { | |
903 | if (len < 0) | |
904 | ret = len; | |
905 | else | |
906 | ret = -EINVAL; | |
907 | goto error; | |
908 | } | |
909 | ||
910 | /* recv channel data */ | |
911 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
912 | if (!channel_data->u.channel.data) { | |
913 | ret = -ENOMEM; | |
914 | goto error; | |
915 | } | |
916 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
917 | channel_data->size); | |
918 | if (len != channel_data->size) { | |
919 | if (len < 0) | |
920 | ret = len; | |
921 | else | |
922 | ret = -EINVAL; | |
923 | goto error_recv_data; | |
924 | } | |
ff0f5728 MD |
925 | /* recv wakeup fd */ |
926 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
927 | if (len <= 0) { | |
928 | if (len < 0) { | |
929 | ret = len; | |
930 | goto error_recv_data; | |
931 | } else { | |
932 | ret = -EIO; | |
933 | goto error_recv_data; | |
934 | } | |
935 | } | |
936 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
937 | *_channel_data = channel_data; |
938 | return 0; | |
939 | ||
940 | error_recv_data: | |
941 | free(channel_data->u.channel.data); | |
942 | error: | |
943 | free(channel_data); | |
944 | error_alloc: | |
945 | return ret; | |
946 | } | |
947 | ||
948 | int ustctl_recv_stream_from_consumer(int sock, | |
949 | struct lttng_ust_object_data **_stream_data) | |
950 | { | |
951 | struct lttng_ust_object_data *stream_data; | |
952 | ssize_t len; | |
953 | int ret; | |
954 | int fds[2]; | |
955 | ||
956 | stream_data = zmalloc(sizeof(*stream_data)); | |
957 | if (!stream_data) { | |
958 | ret = -ENOMEM; | |
959 | goto error_alloc; | |
57773204 | 960 | } |
74d81a6c MD |
961 | |
962 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; | |
963 | stream_data->handle = -1; | |
964 | ||
965 | /* recv mmap size */ | |
966 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
967 | sizeof(stream_data->size)); | |
968 | if (len != sizeof(stream_data->size)) { | |
969 | if (len < 0) | |
970 | ret = len; | |
971 | else | |
972 | ret = -EINVAL; | |
973 | goto error; | |
974 | } | |
975 | if (stream_data->size == -1) { | |
976 | ret = -LTTNG_UST_ERR_NOENT; | |
977 | goto error; | |
978 | } | |
979 | ||
980 | /* recv stream nr */ | |
981 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
982 | sizeof(stream_data->u.stream.stream_nr)); | |
983 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
984 | if (len < 0) | |
985 | ret = len; | |
986 | else | |
987 | ret = -EINVAL; | |
988 | goto error; | |
989 | } | |
990 | ||
991 | /* recv shm fd and wakeup fd */ | |
992 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
993 | if (len <= 0) { | |
994 | if (len < 0) { | |
995 | ret = len; | |
996 | goto error; | |
997 | } else { | |
998 | ret = -EIO; | |
999 | goto error; | |
0bfe09ec | 1000 | } |
0bfe09ec | 1001 | } |
74d81a6c MD |
1002 | stream_data->u.stream.shm_fd = fds[0]; |
1003 | stream_data->u.stream.wakeup_fd = fds[1]; | |
1004 | *_stream_data = stream_data; | |
1005 | return 0; | |
0bfe09ec | 1006 | |
74d81a6c MD |
1007 | error: |
1008 | free(stream_data); | |
1009 | error_alloc: | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
1014 | struct lttng_ust_object_data *channel_data) | |
1015 | { | |
1016 | struct ustcomm_ust_msg lum; | |
1017 | struct ustcomm_ust_reply lur; | |
1018 | int ret; | |
1019 | ||
1020 | if (!channel_data) | |
1021 | return -EINVAL; | |
1022 | ||
1023 | memset(&lum, 0, sizeof(lum)); | |
1024 | lum.handle = session_handle; | |
1025 | lum.cmd = LTTNG_UST_CHANNEL; | |
1026 | lum.u.channel.len = channel_data->size; | |
1027 | lum.u.channel.type = channel_data->u.channel.type; | |
1028 | ret = ustcomm_send_app_msg(sock, &lum); | |
1029 | if (ret) | |
1030 | return ret; | |
1031 | ||
1032 | ret = ustctl_send_channel(sock, | |
1033 | channel_data->u.channel.type, | |
1034 | channel_data->u.channel.data, | |
1035 | channel_data->size, | |
ff0f5728 | 1036 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
1037 | 1); |
1038 | if (ret) | |
1039 | return ret; | |
1040 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
1041 | if (!ret) { | |
7f2348b8 | 1042 | channel_data->handle = lur.ret_val; |
57773204 | 1043 | } |
74d81a6c MD |
1044 | return ret; |
1045 | } | |
1046 | ||
1047 | int ustctl_send_stream_to_ust(int sock, | |
1048 | struct lttng_ust_object_data *channel_data, | |
1049 | struct lttng_ust_object_data *stream_data) | |
1050 | { | |
1051 | struct ustcomm_ust_msg lum; | |
1052 | struct ustcomm_ust_reply lur; | |
1053 | int ret; | |
1054 | ||
1055 | memset(&lum, 0, sizeof(lum)); | |
1056 | lum.handle = channel_data->handle; | |
1057 | lum.cmd = LTTNG_UST_STREAM; | |
1058 | lum.u.stream.len = stream_data->size; | |
1059 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
1060 | ret = ustcomm_send_app_msg(sock, &lum); | |
1061 | if (ret) | |
1062 | return ret; | |
1063 | ||
1064 | assert(stream_data); | |
1065 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); | |
1066 | ||
1067 | ret = ustctl_send_stream(sock, | |
1068 | stream_data->u.stream.stream_nr, | |
1069 | stream_data->size, | |
1070 | stream_data->u.stream.shm_fd, | |
1071 | stream_data->u.stream.wakeup_fd, 1); | |
1072 | if (ret) | |
1073 | return ret; | |
1074 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
1075 | } | |
1076 | ||
12f3dabc MD |
1077 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, |
1078 | struct lttng_ust_object_data *src) | |
1079 | { | |
1080 | struct lttng_ust_object_data *obj; | |
1081 | int ret; | |
1082 | ||
1083 | if (src->handle != -1) { | |
1084 | ret = -EINVAL; | |
1085 | goto error; | |
1086 | } | |
1087 | ||
1088 | obj = zmalloc(sizeof(*obj)); | |
1089 | if (!obj) { | |
1090 | ret = -ENOMEM; | |
1091 | goto error; | |
1092 | } | |
1093 | ||
1094 | obj->type = src->type; | |
1095 | obj->handle = src->handle; | |
1096 | obj->size = src->size; | |
1097 | ||
1098 | switch (obj->type) { | |
1099 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: | |
1100 | { | |
1101 | obj->u.channel.type = src->u.channel.type; | |
1102 | if (src->u.channel.wakeup_fd >= 0) { | |
1103 | obj->u.channel.wakeup_fd = | |
1104 | dup(src->u.channel.wakeup_fd); | |
1105 | if (obj->u.channel.wakeup_fd < 0) { | |
1106 | ret = errno; | |
1107 | goto chan_error_wakeup_fd; | |
1108 | } | |
1109 | } else { | |
1110 | obj->u.channel.wakeup_fd = | |
1111 | src->u.channel.wakeup_fd; | |
1112 | } | |
1113 | obj->u.channel.data = zmalloc(obj->size); | |
1114 | if (!obj->u.channel.data) { | |
1115 | ret = -ENOMEM; | |
1116 | goto chan_error_alloc; | |
1117 | } | |
1118 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
1119 | break; | |
1120 | ||
1121 | chan_error_alloc: | |
1122 | if (src->u.channel.wakeup_fd >= 0) { | |
1123 | int closeret; | |
1124 | ||
1125 | closeret = close(obj->u.channel.wakeup_fd); | |
1126 | if (closeret) { | |
1127 | PERROR("close"); | |
1128 | } | |
1129 | } | |
1130 | chan_error_wakeup_fd: | |
1131 | goto error_type; | |
1132 | ||
1133 | } | |
1134 | ||
1135 | case LTTNG_UST_OBJECT_TYPE_STREAM: | |
1136 | { | |
1137 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
1138 | if (src->u.stream.wakeup_fd >= 0) { | |
1139 | obj->u.stream.wakeup_fd = | |
1140 | dup(src->u.stream.wakeup_fd); | |
1141 | if (obj->u.stream.wakeup_fd < 0) { | |
1142 | ret = errno; | |
1143 | goto stream_error_wakeup_fd; | |
1144 | } | |
1145 | } else { | |
1146 | obj->u.stream.wakeup_fd = | |
1147 | src->u.stream.wakeup_fd; | |
1148 | } | |
1149 | ||
1150 | if (src->u.stream.shm_fd >= 0) { | |
1151 | obj->u.stream.shm_fd = | |
1152 | dup(src->u.stream.shm_fd); | |
1153 | if (obj->u.stream.shm_fd < 0) { | |
1154 | ret = errno; | |
1155 | goto stream_error_shm_fd; | |
1156 | } | |
1157 | } else { | |
1158 | obj->u.stream.shm_fd = | |
1159 | src->u.stream.shm_fd; | |
1160 | } | |
1161 | break; | |
1162 | ||
1163 | stream_error_shm_fd: | |
1164 | if (src->u.stream.wakeup_fd >= 0) { | |
1165 | int closeret; | |
1166 | ||
1167 | closeret = close(obj->u.stream.wakeup_fd); | |
1168 | if (closeret) { | |
1169 | PERROR("close"); | |
1170 | } | |
1171 | } | |
1172 | stream_error_wakeup_fd: | |
1173 | goto error_type; | |
1174 | } | |
1175 | ||
ebabbf58 MD |
1176 | case LTTNG_UST_OBJECT_TYPE_COUNTER: |
1177 | { | |
1178 | obj->u.counter.data = zmalloc(obj->size); | |
1179 | if (!obj->u.counter.data) { | |
1180 | ret = -ENOMEM; | |
1181 | goto error_type; | |
1182 | } | |
1183 | memcpy(obj->u.counter.data, src->u.counter.data, obj->size); | |
1184 | break; | |
1185 | } | |
1186 | ||
1187 | case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL: | |
1188 | { | |
1189 | if (src->u.counter_global.shm_fd >= 0) { | |
1190 | obj->u.counter_global.shm_fd = | |
1191 | dup(src->u.counter_global.shm_fd); | |
1192 | if (obj->u.counter_global.shm_fd < 0) { | |
1193 | ret = errno; | |
1194 | goto error_type; | |
1195 | } | |
1196 | } | |
1197 | break; | |
1198 | } | |
1199 | ||
1200 | case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU: | |
1201 | { | |
1202 | obj->u.counter_cpu.cpu_nr = src->u.counter_cpu.cpu_nr; | |
1203 | if (src->u.counter_cpu.shm_fd >= 0) { | |
1204 | obj->u.counter_cpu.shm_fd = | |
1205 | dup(src->u.counter_cpu.shm_fd); | |
1206 | if (obj->u.counter_cpu.shm_fd < 0) { | |
1207 | ret = errno; | |
1208 | goto error_type; | |
1209 | } | |
1210 | } | |
1211 | break; | |
1212 | } | |
1213 | ||
12f3dabc MD |
1214 | default: |
1215 | ret = -EINVAL; | |
1216 | goto error_type; | |
1217 | } | |
1218 | ||
1219 | *dest = obj; | |
1220 | return 0; | |
1221 | ||
1222 | error_type: | |
1223 | free(obj); | |
1224 | error: | |
1225 | return ret; | |
1226 | } | |
1227 | ||
74d81a6c MD |
1228 | |
1229 | /* Buffer operations */ | |
1230 | ||
5ea386c3 MD |
1231 | int ustctl_get_nr_stream_per_channel(void) |
1232 | { | |
1233 | return num_possible_cpus(); | |
1234 | } | |
1235 | ||
74d81a6c | 1236 | struct ustctl_consumer_channel * |
5ea386c3 MD |
1237 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr, |
1238 | const int *stream_fds, int nr_stream_fds) | |
74d81a6c MD |
1239 | { |
1240 | struct ustctl_consumer_channel *chan; | |
1241 | const char *transport_name; | |
1242 | struct lttng_transport *transport; | |
1243 | ||
1244 | switch (attr->type) { | |
1245 | case LTTNG_UST_CHAN_PER_CPU: | |
1246 | if (attr->output == LTTNG_UST_MMAP) { | |
34a91bdb MD |
1247 | if (attr->overwrite) { |
1248 | if (attr->read_timer_interval == 0) { | |
1249 | transport_name = "relay-overwrite-mmap"; | |
1250 | } else { | |
1251 | transport_name = "relay-overwrite-rt-mmap"; | |
1252 | } | |
1253 | } else { | |
1254 | if (attr->read_timer_interval == 0) { | |
1255 | transport_name = "relay-discard-mmap"; | |
1256 | } else { | |
1257 | transport_name = "relay-discard-rt-mmap"; | |
1258 | } | |
1259 | } | |
74d81a6c MD |
1260 | } else { |
1261 | return NULL; | |
1262 | } | |
c1fca457 | 1263 | break; |
74d81a6c MD |
1264 | case LTTNG_UST_CHAN_METADATA: |
1265 | if (attr->output == LTTNG_UST_MMAP) | |
1266 | transport_name = "relay-metadata-mmap"; | |
1267 | else | |
1268 | return NULL; | |
c1fca457 MD |
1269 | break; |
1270 | default: | |
74d81a6c | 1271 | transport_name = "<unknown>"; |
c1fca457 MD |
1272 | return NULL; |
1273 | } | |
74d81a6c MD |
1274 | |
1275 | transport = lttng_transport_find(transport_name); | |
1276 | if (!transport) { | |
1277 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 1278 | transport_name); |
74d81a6c | 1279 | return NULL; |
7a784989 | 1280 | } |
74d81a6c MD |
1281 | |
1282 | chan = zmalloc(sizeof(*chan)); | |
1283 | if (!chan) | |
1284 | return NULL; | |
1285 | ||
1286 | chan->chan = transport->ops.channel_create(transport_name, NULL, | |
32ce8569 | 1287 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 1288 | attr->switch_timer_interval, |
32ce8569 | 1289 | attr->read_timer_interval, |
a9ff648c | 1290 | attr->uuid, attr->chan_id, |
b2c5f61a MD |
1291 | stream_fds, nr_stream_fds, |
1292 | attr->blocking_timeout); | |
74d81a6c MD |
1293 | if (!chan->chan) { |
1294 | goto chan_error; | |
1295 | } | |
1296 | chan->chan->ops = &transport->ops; | |
1297 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
cb7378b3 MD |
1298 | chan->wait_fd = ustctl_channel_get_wait_fd(chan); |
1299 | chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
1300 | return chan; |
1301 | ||
1302 | chan_error: | |
1303 | free(chan); | |
1304 | return NULL; | |
57773204 MD |
1305 | } |
1306 | ||
74d81a6c | 1307 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
57773204 | 1308 | { |
b24e4e91 MD |
1309 | (void) ustctl_channel_close_wait_fd(chan); |
1310 | (void) ustctl_channel_close_wakeup_fd(chan); | |
74d81a6c MD |
1311 | chan->chan->ops->channel_destroy(chan->chan); |
1312 | free(chan); | |
1313 | } | |
1314 | ||
1315 | int ustctl_send_channel_to_sessiond(int sock, | |
1316 | struct ustctl_consumer_channel *channel) | |
1317 | { | |
1318 | struct shm_object_table *table; | |
57773204 | 1319 | |
74d81a6c MD |
1320 | table = channel->chan->handle->table; |
1321 | if (table->size <= 0) | |
9bfc503d | 1322 | return -EINVAL; |
74d81a6c MD |
1323 | return ustctl_send_channel(sock, |
1324 | channel->attr.type, | |
1325 | table->objects[0].memory_map, | |
1326 | table->objects[0].memory_map_size, | |
ff0f5728 | 1327 | channel->wakeup_fd, |
74d81a6c MD |
1328 | 0); |
1329 | } | |
9bfc503d | 1330 | |
74d81a6c MD |
1331 | int ustctl_send_stream_to_sessiond(int sock, |
1332 | struct ustctl_consumer_stream *stream) | |
1333 | { | |
1334 | if (!stream) | |
1335 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); | |
1336 | ||
1337 | return ustctl_send_stream(sock, | |
1338 | stream->cpu, | |
1339 | stream->memory_map_size, | |
1340 | stream->shm_fd, stream->wakeup_fd, | |
1341 | 0); | |
57773204 MD |
1342 | } |
1343 | ||
c9023c93 MD |
1344 | int ustctl_write_metadata_to_channel( |
1345 | struct ustctl_consumer_channel *channel, | |
1346 | const char *metadata_str, /* NOT null-terminated */ | |
1347 | size_t len) /* metadata length */ | |
1348 | { | |
1349 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1350 | struct lttng_channel *chan = channel->chan; | |
1351 | const char *str = metadata_str; | |
1352 | int ret = 0, waitret; | |
1353 | size_t reserve_len, pos; | |
1354 | ||
1355 | for (pos = 0; pos < len; pos += reserve_len) { | |
1356 | reserve_len = min_t(size_t, | |
1357 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1358 | len - pos); | |
1359 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1360 | sizeof(char), -1, chan->handle, NULL); |
c9023c93 MD |
1361 | /* |
1362 | * We don't care about metadata buffer's records lost | |
1363 | * count, because we always retry here. Report error if | |
1364 | * we need to bail out after timeout or being | |
1365 | * interrupted. | |
1366 | */ | |
1367 | waitret = wait_cond_interruptible_timeout( | |
1368 | ({ | |
1369 | ret = chan->ops->event_reserve(&ctx, 0); | |
1370 | ret != -ENOBUFS || !ret; | |
1371 | }), | |
1372 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1373 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1374 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1375 | waitret == -EINTR ? "interrupted" : | |
1376 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1377 | if (waitret == -EINTR) | |
1378 | ret = waitret; | |
1379 | goto end; | |
1380 | } | |
1381 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
1382 | chan->ops->event_commit(&ctx); | |
1383 | } | |
1384 | end: | |
1385 | return ret; | |
1386 | } | |
1387 | ||
3ef94b0e JD |
1388 | /* |
1389 | * Write at most one packet in the channel. | |
1390 | * Returns the number of bytes written on success, < 0 on error. | |
1391 | */ | |
1392 | ssize_t ustctl_write_one_packet_to_channel( | |
1393 | struct ustctl_consumer_channel *channel, | |
1394 | const char *metadata_str, /* NOT null-terminated */ | |
1395 | size_t len) /* metadata length */ | |
1396 | { | |
1397 | struct lttng_ust_lib_ring_buffer_ctx ctx; | |
1398 | struct lttng_channel *chan = channel->chan; | |
1399 | const char *str = metadata_str; | |
1400 | ssize_t reserve_len; | |
1401 | int ret; | |
1402 | ||
1403 | reserve_len = min_t(ssize_t, | |
1404 | chan->ops->packet_avail_size(chan->chan, chan->handle), | |
1405 | len); | |
1406 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
53569322 | 1407 | sizeof(char), -1, chan->handle, NULL); |
3ef94b0e JD |
1408 | ret = chan->ops->event_reserve(&ctx, 0); |
1409 | if (ret != 0) { | |
1410 | DBG("LTTng: event reservation failed"); | |
1411 | assert(ret < 0); | |
1412 | reserve_len = ret; | |
1413 | goto end; | |
1414 | } | |
1415 | chan->ops->event_write(&ctx, str, reserve_len); | |
1416 | chan->ops->event_commit(&ctx); | |
1417 | ||
1418 | end: | |
1419 | return reserve_len; | |
1420 | } | |
1421 | ||
ff0f5728 MD |
1422 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan) |
1423 | { | |
1424 | struct channel *chan; | |
cb7378b3 | 1425 | int ret; |
ff0f5728 MD |
1426 | |
1427 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1428 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
ff0f5728 | 1429 | chan, chan->handle); |
cb7378b3 MD |
1430 | if (!ret) |
1431 | consumer_chan->wait_fd = -1; | |
1432 | return ret; | |
ff0f5728 MD |
1433 | } |
1434 | ||
1435 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan) | |
1436 | { | |
1437 | struct channel *chan; | |
cb7378b3 | 1438 | int ret; |
ff0f5728 MD |
1439 | |
1440 | chan = consumer_chan->chan->chan; | |
cb7378b3 | 1441 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1442 | chan, chan->handle); |
cb7378b3 MD |
1443 | if (!ret) |
1444 | consumer_chan->wakeup_fd = -1; | |
1445 | return ret; | |
ff0f5728 MD |
1446 | } |
1447 | ||
74d81a6c | 1448 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
5224b5c8 MD |
1449 | { |
1450 | struct channel *chan; | |
1451 | ||
74d81a6c | 1452 | chan = stream->chan->chan->chan; |
ff0f5728 | 1453 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
74d81a6c | 1454 | chan, stream->handle, stream->cpu); |
5224b5c8 MD |
1455 | } |
1456 | ||
74d81a6c | 1457 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
6e922b24 | 1458 | { |
66bdd22a | 1459 | struct channel *chan; |
74d81a6c MD |
1460 | |
1461 | chan = stream->chan->chan->chan; | |
ff0f5728 | 1462 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
74d81a6c MD |
1463 | chan, stream->handle, stream->cpu); |
1464 | } | |
1465 | ||
1466 | struct ustctl_consumer_stream * | |
1467 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
1468 | int cpu) | |
1469 | { | |
1470 | struct ustctl_consumer_stream *stream; | |
1471 | struct lttng_ust_shm_handle *handle; | |
1472 | struct channel *chan; | |
1473 | int shm_fd, wait_fd, wakeup_fd; | |
1474 | uint64_t memory_map_size; | |
4cfec15c | 1475 | struct lttng_ust_lib_ring_buffer *buf; |
6e922b24 MD |
1476 | int ret; |
1477 | ||
74d81a6c MD |
1478 | if (!channel) |
1479 | return NULL; | |
1480 | handle = channel->chan->handle; | |
9bfc503d MD |
1481 | if (!handle) |
1482 | return NULL; | |
1483 | ||
74d81a6c | 1484 | chan = channel->chan->chan; |
6e922b24 | 1485 | buf = channel_get_ring_buffer(&chan->backend.config, |
74d81a6c MD |
1486 | chan, cpu, handle, &shm_fd, &wait_fd, |
1487 | &wakeup_fd, &memory_map_size); | |
6e922b24 MD |
1488 | if (!buf) |
1489 | return NULL; | |
74d81a6c | 1490 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1491 | if (ret) |
1492 | return NULL; | |
74d81a6c MD |
1493 | |
1494 | stream = zmalloc(sizeof(*stream)); | |
1495 | if (!stream) | |
1496 | goto alloc_error; | |
1497 | stream->handle = handle; | |
1498 | stream->buf = buf; | |
1499 | stream->chan = channel; | |
1500 | stream->shm_fd = shm_fd; | |
1501 | stream->wait_fd = wait_fd; | |
1502 | stream->wakeup_fd = wakeup_fd; | |
1503 | stream->memory_map_size = memory_map_size; | |
1504 | stream->cpu = cpu; | |
1505 | return stream; | |
1506 | ||
1507 | alloc_error: | |
1508 | return NULL; | |
1509 | } | |
1510 | ||
1511 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) | |
1512 | { | |
1513 | struct lttng_ust_lib_ring_buffer *buf; | |
1514 | struct ustctl_consumer_channel *consumer_chan; | |
1515 | ||
1516 | assert(stream); | |
1517 | buf = stream->buf; | |
1518 | consumer_chan = stream->chan; | |
b24e4e91 MD |
1519 | (void) ustctl_stream_close_wait_fd(stream); |
1520 | (void) ustctl_stream_close_wakeup_fd(stream); | |
74d81a6c MD |
1521 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); |
1522 | free(stream); | |
6e922b24 MD |
1523 | } |
1524 | ||
ff0f5728 MD |
1525 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan) |
1526 | { | |
1527 | if (!chan) | |
1528 | return -EINVAL; | |
1529 | return shm_get_wait_fd(chan->chan->handle, | |
1530 | &chan->chan->handle->chan._ref); | |
1531 | } | |
1532 | ||
1533 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan) | |
1534 | { | |
1535 | if (!chan) | |
1536 | return -EINVAL; | |
1537 | return shm_get_wakeup_fd(chan->chan->handle, | |
1538 | &chan->chan->handle->chan._ref); | |
1539 | } | |
1540 | ||
1541 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream) | |
6e922b24 | 1542 | { |
74d81a6c MD |
1543 | struct lttng_ust_lib_ring_buffer *buf; |
1544 | struct ustctl_consumer_channel *consumer_chan; | |
1545 | ||
1546 | if (!stream) | |
1547 | return -EINVAL; | |
1548 | buf = stream->buf; | |
1549 | consumer_chan = stream->chan; | |
1550 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); | |
1551 | } | |
1552 | ||
ff0f5728 | 1553 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
74d81a6c MD |
1554 | { |
1555 | struct lttng_ust_lib_ring_buffer *buf; | |
1556 | struct ustctl_consumer_channel *consumer_chan; | |
1557 | ||
1558 | if (!stream) | |
1559 | return -EINVAL; | |
1560 | buf = stream->buf; | |
1561 | consumer_chan = stream->chan; | |
1562 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); | |
6e922b24 MD |
1563 | } |
1564 | ||
57773204 MD |
1565 | /* For mmap mode, readable without "get" operation */ |
1566 | ||
74d81a6c | 1567 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
9095efe9 | 1568 | { |
74d81a6c MD |
1569 | struct lttng_ust_lib_ring_buffer *buf; |
1570 | struct ustctl_consumer_channel *consumer_chan; | |
1571 | ||
1572 | if (!stream) | |
9bfc503d | 1573 | return NULL; |
74d81a6c MD |
1574 | buf = stream->buf; |
1575 | consumer_chan = stream->chan; | |
1576 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); | |
9095efe9 MD |
1577 | } |
1578 | ||
57773204 | 1579 | /* returns the length to mmap. */ |
74d81a6c | 1580 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
57773204 MD |
1581 | unsigned long *len) |
1582 | { | |
74d81a6c | 1583 | struct ustctl_consumer_channel *consumer_chan; |
57773204 | 1584 | unsigned long mmap_buf_len; |
66bdd22a | 1585 | struct channel *chan; |
57773204 | 1586 | |
74d81a6c | 1587 | if (!stream) |
9bfc503d | 1588 | return -EINVAL; |
74d81a6c MD |
1589 | consumer_chan = stream->chan; |
1590 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1591 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1592 | return -EINVAL; | |
1593 | mmap_buf_len = chan->backend.buf_size; | |
1594 | if (chan->backend.extra_reader_sb) | |
1595 | mmap_buf_len += chan->backend.subbuf_size; | |
1596 | if (mmap_buf_len > INT_MAX) | |
1597 | return -EFBIG; | |
1598 | *len = mmap_buf_len; | |
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | /* returns the maximum size for sub-buffers. */ | |
74d81a6c | 1603 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
57773204 MD |
1604 | unsigned long *len) |
1605 | { | |
74d81a6c | 1606 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1607 | struct channel *chan; |
57773204 | 1608 | |
74d81a6c | 1609 | if (!stream) |
9bfc503d | 1610 | return -EINVAL; |
74d81a6c MD |
1611 | consumer_chan = stream->chan; |
1612 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1613 | *len = chan->backend.subbuf_size; |
1614 | return 0; | |
1615 | } | |
1616 | ||
1617 | /* | |
1618 | * For mmap mode, operate on the current packet (between get/put or | |
1619 | * get_next/put_next). | |
1620 | */ | |
1621 | ||
1622 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
74d81a6c MD |
1623 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
1624 | unsigned long *off) | |
57773204 | 1625 | { |
66bdd22a | 1626 | struct channel *chan; |
57773204 | 1627 | unsigned long sb_bindex; |
74d81a6c MD |
1628 | struct lttng_ust_lib_ring_buffer *buf; |
1629 | struct ustctl_consumer_channel *consumer_chan; | |
34daae3e MD |
1630 | struct lttng_ust_lib_ring_buffer_backend_pages_shmp *barray_idx; |
1631 | struct lttng_ust_lib_ring_buffer_backend_pages *pages; | |
57773204 | 1632 | |
74d81a6c | 1633 | if (!stream) |
9bfc503d | 1634 | return -EINVAL; |
74d81a6c MD |
1635 | buf = stream->buf; |
1636 | consumer_chan = stream->chan; | |
1637 | chan = consumer_chan->chan->chan; | |
57773204 MD |
1638 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
1639 | return -EINVAL; | |
1640 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, | |
32ce8569 | 1641 | buf->backend.buf_rsb.id); |
34daae3e MD |
1642 | barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array, |
1643 | sb_bindex); | |
1644 | if (!barray_idx) | |
1645 | return -EINVAL; | |
1646 | pages = shmp(consumer_chan->chan->handle, barray_idx->shmp); | |
1647 | if (!pages) | |
1648 | return -EINVAL; | |
1649 | *off = pages->mmap_offset; | |
57773204 MD |
1650 | return 0; |
1651 | } | |
1652 | ||
1653 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1654 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
1655 | unsigned long *len) | |
57773204 | 1656 | { |
74d81a6c | 1657 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1658 | struct channel *chan; |
74d81a6c | 1659 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1660 | |
74d81a6c | 1661 | if (!stream) |
9bfc503d MD |
1662 | return -EINVAL; |
1663 | ||
74d81a6c MD |
1664 | buf = stream->buf; |
1665 | consumer_chan = stream->chan; | |
1666 | chan = consumer_chan->chan->chan; | |
57773204 | 1667 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1668 | consumer_chan->chan->handle); |
57773204 MD |
1669 | return 0; |
1670 | } | |
1671 | ||
1672 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
74d81a6c MD |
1673 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
1674 | unsigned long *len) | |
57773204 | 1675 | { |
74d81a6c | 1676 | struct ustctl_consumer_channel *consumer_chan; |
66bdd22a | 1677 | struct channel *chan; |
74d81a6c | 1678 | struct lttng_ust_lib_ring_buffer *buf; |
57773204 | 1679 | |
74d81a6c | 1680 | if (!stream) |
9bfc503d | 1681 | return -EINVAL; |
74d81a6c MD |
1682 | buf = stream->buf; |
1683 | consumer_chan = stream->chan; | |
1684 | chan = consumer_chan->chan->chan; | |
57773204 | 1685 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
74d81a6c | 1686 | consumer_chan->chan->handle); |
b72687b8 | 1687 | *len = LTTNG_UST_PAGE_ALIGN(*len); |
57773204 MD |
1688 | return 0; |
1689 | } | |
1690 | ||
1691 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
74d81a6c | 1692 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1693 | { |
74d81a6c MD |
1694 | struct lttng_ust_lib_ring_buffer *buf; |
1695 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1696 | |
74d81a6c MD |
1697 | if (!stream) |
1698 | return -EINVAL; | |
1699 | buf = stream->buf; | |
1700 | consumer_chan = stream->chan; | |
1701 | return lib_ring_buffer_get_next_subbuf(buf, | |
1702 | consumer_chan->chan->handle); | |
57773204 MD |
1703 | } |
1704 | ||
1705 | ||
1706 | /* Release exclusive sub-buffer access, move consumer forward. */ | |
74d81a6c | 1707 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1708 | { |
74d81a6c MD |
1709 | struct lttng_ust_lib_ring_buffer *buf; |
1710 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1711 | |
74d81a6c MD |
1712 | if (!stream) |
1713 | return -EINVAL; | |
1714 | buf = stream->buf; | |
1715 | consumer_chan = stream->chan; | |
1716 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1717 | return 0; |
1718 | } | |
1719 | ||
1720 | /* snapshot */ | |
1721 | ||
1722 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
74d81a6c | 1723 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
57773204 | 1724 | { |
74d81a6c MD |
1725 | struct lttng_ust_lib_ring_buffer *buf; |
1726 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1727 | |
74d81a6c MD |
1728 | if (!stream) |
1729 | return -EINVAL; | |
1730 | buf = stream->buf; | |
1731 | consumer_chan = stream->chan; | |
57773204 | 1732 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
74d81a6c | 1733 | &buf->prod_snapshot, consumer_chan->chan->handle); |
57773204 MD |
1734 | } |
1735 | ||
f45930b7 JG |
1736 | /* |
1737 | * Get a snapshot of the current ring buffer producer and consumer positions | |
1738 | * even if the consumed and produced positions are contained within the same | |
1739 | * subbuffer. | |
1740 | */ | |
1741 | int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream) | |
1742 | { | |
1743 | struct lttng_ust_lib_ring_buffer *buf; | |
1744 | struct ustctl_consumer_channel *consumer_chan; | |
1745 | ||
1746 | if (!stream) | |
1747 | return -EINVAL; | |
1748 | buf = stream->buf; | |
1749 | consumer_chan = stream->chan; | |
1750 | return lib_ring_buffer_snapshot_sample_positions(buf, | |
1751 | &buf->cons_snapshot, &buf->prod_snapshot, | |
1752 | consumer_chan->chan->handle); | |
1753 | } | |
1754 | ||
57773204 | 1755 | /* Get the consumer position (iteration start) */ |
74d81a6c MD |
1756 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
1757 | unsigned long *pos) | |
57773204 | 1758 | { |
74d81a6c | 1759 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1760 | |
74d81a6c MD |
1761 | if (!stream) |
1762 | return -EINVAL; | |
1763 | buf = stream->buf; | |
57773204 MD |
1764 | *pos = buf->cons_snapshot; |
1765 | return 0; | |
1766 | } | |
1767 | ||
1768 | /* Get the producer position (iteration end) */ | |
74d81a6c MD |
1769 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
1770 | unsigned long *pos) | |
57773204 | 1771 | { |
74d81a6c | 1772 | struct lttng_ust_lib_ring_buffer *buf; |
9bfc503d | 1773 | |
74d81a6c MD |
1774 | if (!stream) |
1775 | return -EINVAL; | |
1776 | buf = stream->buf; | |
57773204 MD |
1777 | *pos = buf->prod_snapshot; |
1778 | return 0; | |
1779 | } | |
1780 | ||
1781 | /* Get exclusive read access to the specified sub-buffer position */ | |
74d81a6c MD |
1782 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
1783 | unsigned long *pos) | |
57773204 | 1784 | { |
74d81a6c MD |
1785 | struct lttng_ust_lib_ring_buffer *buf; |
1786 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1787 | |
74d81a6c MD |
1788 | if (!stream) |
1789 | return -EINVAL; | |
1790 | buf = stream->buf; | |
1791 | consumer_chan = stream->chan; | |
1792 | return lib_ring_buffer_get_subbuf(buf, *pos, | |
1793 | consumer_chan->chan->handle); | |
57773204 MD |
1794 | } |
1795 | ||
1796 | /* Release exclusive sub-buffer access */ | |
74d81a6c | 1797 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
57773204 | 1798 | { |
74d81a6c MD |
1799 | struct lttng_ust_lib_ring_buffer *buf; |
1800 | struct ustctl_consumer_channel *consumer_chan; | |
9bfc503d | 1801 | |
74d81a6c MD |
1802 | if (!stream) |
1803 | return -EINVAL; | |
1804 | buf = stream->buf; | |
1805 | consumer_chan = stream->chan; | |
1806 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); | |
57773204 MD |
1807 | return 0; |
1808 | } | |
1809 | ||
74d81a6c | 1810 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
b52190f2 | 1811 | int producer_active) |
57773204 | 1812 | { |
74d81a6c MD |
1813 | struct lttng_ust_lib_ring_buffer *buf; |
1814 | struct ustctl_consumer_channel *consumer_chan; | |
1815 | ||
1816 | assert(stream); | |
1817 | buf = stream->buf; | |
1818 | consumer_chan = stream->chan; | |
b52190f2 MD |
1819 | lib_ring_buffer_switch_slow(buf, |
1820 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
74d81a6c MD |
1821 | consumer_chan->chan->handle); |
1822 | } | |
1823 | ||
beca55a1 MD |
1824 | void ustctl_clear_buffer(struct ustctl_consumer_stream *stream) |
1825 | { | |
1826 | struct lttng_ust_lib_ring_buffer *buf; | |
1827 | struct ustctl_consumer_channel *consumer_chan; | |
1828 | ||
1829 | assert(stream); | |
1830 | buf = stream->buf; | |
1831 | consumer_chan = stream->chan; | |
1832 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, | |
1833 | consumer_chan->chan->handle); | |
1834 | lib_ring_buffer_clear_reader(buf, consumer_chan->chan->handle); | |
1835 | } | |
1836 | ||
b2f3252a JD |
1837 | static |
1838 | struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb( | |
1839 | struct lttng_ust_lib_ring_buffer *buf, | |
1840 | struct lttng_ust_shm_handle *handle) | |
1841 | { | |
1842 | struct channel *chan; | |
1843 | const struct lttng_ust_lib_ring_buffer_config *config; | |
1844 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1845 | ||
1846 | chan = shmp(handle, buf->backend.chan); | |
34daae3e MD |
1847 | if (!chan) |
1848 | return NULL; | |
b2f3252a JD |
1849 | config = &chan->backend.config; |
1850 | if (!config->cb_ptr) | |
1851 | return NULL; | |
1852 | client_cb = caa_container_of(config->cb_ptr, | |
1853 | struct lttng_ust_client_lib_ring_buffer_client_cb, | |
1854 | parent); | |
1855 | return client_cb; | |
1856 | } | |
1857 | ||
1858 | int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream, | |
1859 | uint64_t *timestamp_begin) | |
1860 | { | |
1861 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1862 | struct lttng_ust_lib_ring_buffer *buf; |
1863 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1864 | |
1865 | if (!stream || !timestamp_begin) | |
1866 | return -EINVAL; | |
e1919a41 MD |
1867 | buf = stream->buf; |
1868 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1869 | client_cb = get_client_cb(buf, handle); |
1870 | if (!client_cb) | |
1871 | return -ENOSYS; | |
1872 | return client_cb->timestamp_begin(buf, handle, timestamp_begin); | |
1873 | } | |
1874 | ||
1875 | int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream, | |
1876 | uint64_t *timestamp_end) | |
1877 | { | |
1878 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1879 | struct lttng_ust_lib_ring_buffer *buf; |
1880 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1881 | |
1882 | if (!stream || !timestamp_end) | |
1883 | return -EINVAL; | |
e1919a41 MD |
1884 | buf = stream->buf; |
1885 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1886 | client_cb = get_client_cb(buf, handle); |
1887 | if (!client_cb) | |
1888 | return -ENOSYS; | |
1889 | return client_cb->timestamp_end(buf, handle, timestamp_end); | |
1890 | } | |
1891 | ||
1892 | int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream, | |
1893 | uint64_t *events_discarded) | |
1894 | { | |
1895 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1896 | struct lttng_ust_lib_ring_buffer *buf; |
1897 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1898 | |
1899 | if (!stream || !events_discarded) | |
1900 | return -EINVAL; | |
e1919a41 MD |
1901 | buf = stream->buf; |
1902 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1903 | client_cb = get_client_cb(buf, handle); |
1904 | if (!client_cb) | |
1905 | return -ENOSYS; | |
1906 | return client_cb->events_discarded(buf, handle, events_discarded); | |
1907 | } | |
1908 | ||
1909 | int ustctl_get_content_size(struct ustctl_consumer_stream *stream, | |
1910 | uint64_t *content_size) | |
1911 | { | |
1912 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1913 | struct lttng_ust_lib_ring_buffer *buf; |
1914 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1915 | |
1916 | if (!stream || !content_size) | |
1917 | return -EINVAL; | |
e1919a41 MD |
1918 | buf = stream->buf; |
1919 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1920 | client_cb = get_client_cb(buf, handle); |
1921 | if (!client_cb) | |
1922 | return -ENOSYS; | |
1923 | return client_cb->content_size(buf, handle, content_size); | |
1924 | } | |
1925 | ||
1926 | int ustctl_get_packet_size(struct ustctl_consumer_stream *stream, | |
1927 | uint64_t *packet_size) | |
1928 | { | |
1929 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1930 | struct lttng_ust_lib_ring_buffer *buf; |
1931 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1932 | |
1933 | if (!stream || !packet_size) | |
1934 | return -EINVAL; | |
e1919a41 MD |
1935 | buf = stream->buf; |
1936 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1937 | client_cb = get_client_cb(buf, handle); |
1938 | if (!client_cb) | |
1939 | return -ENOSYS; | |
1940 | return client_cb->packet_size(buf, handle, packet_size); | |
1941 | } | |
1942 | ||
1943 | int ustctl_get_stream_id(struct ustctl_consumer_stream *stream, | |
1944 | uint64_t *stream_id) | |
1945 | { | |
1946 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1947 | struct lttng_ust_lib_ring_buffer *buf; |
1948 | struct lttng_ust_shm_handle *handle; | |
b2f3252a JD |
1949 | |
1950 | if (!stream || !stream_id) | |
1951 | return -EINVAL; | |
e1919a41 MD |
1952 | buf = stream->buf; |
1953 | handle = stream->chan->chan->handle; | |
b2f3252a JD |
1954 | client_cb = get_client_cb(buf, handle); |
1955 | if (!client_cb) | |
1956 | return -ENOSYS; | |
1957 | return client_cb->stream_id(buf, handle, stream_id); | |
1958 | } | |
1959 | ||
fca361e8 JD |
1960 | int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream, |
1961 | uint64_t *ts) | |
1962 | { | |
1963 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
e1919a41 MD |
1964 | struct lttng_ust_lib_ring_buffer *buf; |
1965 | struct lttng_ust_shm_handle *handle; | |
fca361e8 JD |
1966 | |
1967 | if (!stream || !ts) | |
1968 | return -EINVAL; | |
e1919a41 MD |
1969 | buf = stream->buf; |
1970 | handle = stream->chan->chan->handle; | |
fca361e8 JD |
1971 | client_cb = get_client_cb(buf, handle); |
1972 | if (!client_cb || !client_cb->current_timestamp) | |
1973 | return -ENOSYS; | |
1974 | return client_cb->current_timestamp(buf, handle, ts); | |
1975 | } | |
1976 | ||
1ff31389 JD |
1977 | int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream, |
1978 | uint64_t *seq) | |
1979 | { | |
1980 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1981 | struct lttng_ust_lib_ring_buffer *buf; | |
1982 | struct lttng_ust_shm_handle *handle; | |
1983 | ||
1984 | if (!stream || !seq) | |
1985 | return -EINVAL; | |
1986 | buf = stream->buf; | |
1987 | handle = stream->chan->chan->handle; | |
1988 | client_cb = get_client_cb(buf, handle); | |
1989 | if (!client_cb || !client_cb->sequence_number) | |
1990 | return -ENOSYS; | |
1991 | return client_cb->sequence_number(buf, handle, seq); | |
1992 | } | |
1993 | ||
45a00b05 JD |
1994 | int ustctl_get_instance_id(struct ustctl_consumer_stream *stream, |
1995 | uint64_t *id) | |
1996 | { | |
1997 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
1998 | struct lttng_ust_lib_ring_buffer *buf; | |
1999 | struct lttng_ust_shm_handle *handle; | |
2000 | ||
2001 | if (!stream || !id) | |
2002 | return -EINVAL; | |
2003 | buf = stream->buf; | |
2004 | handle = stream->chan->chan->handle; | |
2005 | client_cb = get_client_cb(buf, handle); | |
2006 | if (!client_cb) | |
2007 | return -ENOSYS; | |
2008 | return client_cb->instance_id(buf, handle, id); | |
2009 | } | |
2010 | ||
c62a3816 | 2011 | #ifdef LTTNG_UST_HAVE_PERF_EVENT |
57201bb3 MD |
2012 | |
2013 | int ustctl_has_perf_counters(void) | |
2014 | { | |
2015 | return 1; | |
2016 | } | |
2017 | ||
2018 | #else | |
2019 | ||
2020 | int ustctl_has_perf_counters(void) | |
2021 | { | |
2022 | return 0; | |
2023 | } | |
2024 | ||
2025 | #endif | |
2026 | ||
a834901f MD |
2027 | #ifdef __linux__ |
2028 | /* | |
2029 | * Override application pid/uid/gid with unix socket credentials. If | |
2030 | * the application announced a pid matching our view, it means it is | |
2031 | * within the same pid namespace, so expose the ppid provided by the | |
2032 | * application. | |
2033 | */ | |
2034 | static | |
2035 | int get_cred(int sock, | |
2036 | const struct ustctl_reg_msg *reg_msg, | |
2037 | uint32_t *pid, | |
2038 | uint32_t *ppid, | |
2039 | uint32_t *uid, | |
2040 | uint32_t *gid) | |
2041 | { | |
2042 | struct ucred ucred; | |
2043 | socklen_t ucred_len = sizeof(struct ucred); | |
2044 | int ret; | |
2045 | ||
2046 | ret = getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &ucred, &ucred_len); | |
2047 | if (ret) { | |
2048 | return -LTTNG_UST_ERR_PEERCRED; | |
2049 | } | |
2050 | DBG("Unix socket peercred [ pid: %u, uid: %u, gid: %u ], " | |
2051 | "application registered claiming [ pid: %u, ppid: %u, uid: %u, gid: %u ]", | |
2052 | ucred.pid, ucred.uid, ucred.gid, | |
2053 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); | |
2054 | if (!ucred.pid) { | |
2055 | ERR("Unix socket credential pid=0. Refusing application in distinct, non-nested pid namespace."); | |
2056 | return -LTTNG_UST_ERR_PEERCRED_PID; | |
2057 | } | |
2058 | *pid = ucred.pid; | |
2059 | *uid = ucred.uid; | |
2060 | *gid = ucred.gid; | |
2061 | if (ucred.pid == reg_msg->pid) { | |
2062 | *ppid = reg_msg->ppid; | |
2063 | } else { | |
2064 | *ppid = 0; | |
2065 | } | |
2066 | return 0; | |
2067 | } | |
2068 | #elif defined(__FreeBSD__) | |
2069 | #include <sys/ucred.h> | |
2070 | ||
2071 | /* | |
2072 | * Override application uid/gid with unix socket credentials. Use the | |
2073 | * first group of the cr_groups. | |
2074 | * Use the pid and ppid provided by the application on registration. | |
2075 | */ | |
2076 | static | |
2077 | int get_cred(int sock, | |
2078 | const struct ustctl_reg_msg *reg_msg, | |
2079 | uint32_t *pid, | |
2080 | uint32_t *ppid, | |
2081 | uint32_t *uid, | |
2082 | uint32_t *gid) | |
2083 | { | |
2084 | struct xucred xucred; | |
2085 | socklen_t xucred_len = sizeof(struct xucred); | |
2086 | int ret; | |
2087 | ||
2088 | ret = getsockopt(sock, SOL_SOCKET, LOCAL_PEERCRED, &xucred, &xucred_len); | |
2089 | if (ret) { | |
2090 | return -LTTNG_UST_ERR_PEERCRED; | |
2091 | } | |
2092 | if (xucred.cr_version != XUCRED_VERSION || xucred.cr_ngroups < 1) { | |
2093 | return -LTTNG_UST_ERR_PEERCRED; | |
2094 | } | |
2095 | DBG("Unix socket peercred [ uid: %u, gid: %u ], " | |
2096 | "application registered claiming [ pid: %d, ppid: %d, uid: %u, gid: %u ]", | |
2097 | xucred.uid, xucred.cr_groups[0], | |
2098 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); | |
2099 | *pid = reg_msg->pid; | |
2100 | *ppid = reg_msg->ppid; | |
2101 | *uid = xucred.uid; | |
2102 | *gid = xucred.cr_groups[0]; | |
2103 | return 0; | |
2104 | } | |
2105 | #else | |
2106 | #warning "Using insecure fallback: trusting user id provided by registered applications. Please consider implementing use of unix socket credentials on your platform." | |
2107 | static | |
2108 | int get_cred(int sock, | |
2109 | const struct ustctl_reg_msg *reg_msg, | |
2110 | uint32_t *pid, | |
2111 | uint32_t *ppid, | |
2112 | uint32_t *uid, | |
2113 | uint32_t *gid) | |
2114 | { | |
2115 | DBG("Application registered claiming [ pid: %u, ppid: %d, uid: %u, gid: %u ]", | |
2116 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); | |
2117 | *pid = reg_msg->pid; | |
2118 | *ppid = reg_msg->ppid; | |
2119 | *uid = reg_msg->uid; | |
2120 | *gid = reg_msg->gid; | |
2121 | return 0; | |
2122 | } | |
2123 | #endif | |
2124 | ||
32ce8569 MD |
2125 | /* |
2126 | * Returns 0 on success, negative error value on error. | |
2127 | */ | |
2128 | int ustctl_recv_reg_msg(int sock, | |
2129 | enum ustctl_socket_type *type, | |
2130 | uint32_t *major, | |
2131 | uint32_t *minor, | |
2132 | uint32_t *pid, | |
2133 | uint32_t *ppid, | |
2134 | uint32_t *uid, | |
2135 | uint32_t *gid, | |
2136 | uint32_t *bits_per_long, | |
2137 | uint32_t *uint8_t_alignment, | |
2138 | uint32_t *uint16_t_alignment, | |
2139 | uint32_t *uint32_t_alignment, | |
2140 | uint32_t *uint64_t_alignment, | |
2141 | uint32_t *long_alignment, | |
2142 | int *byte_order, | |
2143 | char *name) | |
2144 | { | |
2145 | ssize_t len; | |
2146 | struct ustctl_reg_msg reg_msg; | |
2147 | ||
2148 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
2149 | if (len > 0 && len != sizeof(reg_msg)) | |
2150 | return -EIO; | |
2151 | if (len == 0) | |
2152 | return -EPIPE; | |
2153 | if (len < 0) | |
2154 | return len; | |
2155 | ||
2156 | if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) { | |
2157 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
2158 | BIG_ENDIAN : LITTLE_ENDIAN; | |
2159 | } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) { | |
2160 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? | |
2161 | LITTLE_ENDIAN : BIG_ENDIAN; | |
2162 | } else { | |
2163 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
2164 | } | |
2165 | switch (reg_msg.socket_type) { | |
2166 | case 0: *type = USTCTL_SOCKET_CMD; | |
2167 | break; | |
2168 | case 1: *type = USTCTL_SOCKET_NOTIFY; | |
2169 | break; | |
2170 | default: | |
2171 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
2172 | } | |
2173 | *major = reg_msg.major; | |
2174 | *minor = reg_msg.minor; | |
32ce8569 MD |
2175 | *bits_per_long = reg_msg.bits_per_long; |
2176 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
2177 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
2178 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
2179 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
2180 | *long_alignment = reg_msg.long_alignment; | |
2181 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
6a359b8a MD |
2182 | if (reg_msg.major < LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE || |
2183 | reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) { | |
32ce8569 MD |
2184 | return -LTTNG_UST_ERR_UNSUP_MAJOR; |
2185 | } | |
a834901f | 2186 | return get_cred(sock, ®_msg, pid, ppid, uid, gid); |
32ce8569 MD |
2187 | } |
2188 | ||
2189 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd) | |
2190 | { | |
2191 | struct ustcomm_notify_hdr header; | |
2192 | ssize_t len; | |
2193 | ||
2194 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
2195 | if (len > 0 && len != sizeof(header)) | |
2196 | return -EIO; | |
2197 | if (len == 0) | |
2198 | return -EPIPE; | |
2199 | if (len < 0) | |
2200 | return len; | |
2201 | switch (header.notify_cmd) { | |
2202 | case 0: | |
2203 | *notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
2204 | break; | |
2205 | case 1: | |
2206 | *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
2207 | break; | |
c785c634 MD |
2208 | case 2: |
2209 | *notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
2210 | break; | |
32ce8569 MD |
2211 | default: |
2212 | return -EINVAL; | |
2213 | } | |
2214 | return 0; | |
2215 | } | |
2216 | ||
2217 | /* | |
2218 | * Returns 0 on success, negative error value on error. | |
2219 | */ | |
2220 | int ustctl_recv_register_event(int sock, | |
2221 | int *session_objd, | |
2222 | int *channel_objd, | |
2223 | char *event_name, | |
2224 | int *loglevel, | |
2225 | char **signature, | |
2226 | size_t *nr_fields, | |
2227 | struct ustctl_field **fields, | |
2228 | char **model_emf_uri) | |
2229 | { | |
2230 | ssize_t len; | |
2231 | struct ustcomm_notify_event_msg msg; | |
2232 | size_t signature_len, fields_len, model_emf_uri_len; | |
2233 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
2234 | struct ustctl_field *a_fields = NULL; | |
2235 | ||
2236 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2237 | if (len > 0 && len != sizeof(msg)) | |
2238 | return -EIO; | |
2239 | if (len == 0) | |
2240 | return -EPIPE; | |
2241 | if (len < 0) | |
2242 | return len; | |
2243 | ||
2244 | *session_objd = msg.session_objd; | |
2245 | *channel_objd = msg.channel_objd; | |
2246 | strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN); | |
2247 | event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2248 | *loglevel = msg.loglevel; | |
2249 | signature_len = msg.signature_len; | |
2250 | fields_len = msg.fields_len; | |
2251 | ||
2252 | if (fields_len % sizeof(*a_fields) != 0) { | |
2253 | return -EINVAL; | |
2254 | } | |
2255 | ||
2256 | model_emf_uri_len = msg.model_emf_uri_len; | |
2257 | ||
2258 | /* recv signature. contains at least \0. */ | |
2259 | a_sign = zmalloc(signature_len); | |
2260 | if (!a_sign) | |
2261 | return -ENOMEM; | |
2262 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
2263 | if (len > 0 && len != signature_len) { | |
2264 | len = -EIO; | |
2265 | goto signature_error; | |
2266 | } | |
2267 | if (len == 0) { | |
2268 | len = -EPIPE; | |
2269 | goto signature_error; | |
2270 | } | |
2271 | if (len < 0) { | |
2272 | goto signature_error; | |
2273 | } | |
2274 | /* Enforce end of string */ | |
111198c2 | 2275 | a_sign[signature_len - 1] = '\0'; |
32ce8569 MD |
2276 | |
2277 | /* recv fields */ | |
2278 | if (fields_len) { | |
2279 | a_fields = zmalloc(fields_len); | |
2280 | if (!a_fields) { | |
2281 | len = -ENOMEM; | |
2282 | goto signature_error; | |
2283 | } | |
2284 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2285 | if (len > 0 && len != fields_len) { | |
2286 | len = -EIO; | |
2287 | goto fields_error; | |
2288 | } | |
2289 | if (len == 0) { | |
2290 | len = -EPIPE; | |
2291 | goto fields_error; | |
2292 | } | |
2293 | if (len < 0) { | |
2294 | goto fields_error; | |
2295 | } | |
2296 | } | |
2297 | ||
2298 | if (model_emf_uri_len) { | |
2299 | /* recv model_emf_uri_len */ | |
2300 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
2301 | if (!a_model_emf_uri) { | |
2302 | len = -ENOMEM; | |
2303 | goto fields_error; | |
2304 | } | |
2305 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
2306 | model_emf_uri_len); | |
2307 | if (len > 0 && len != model_emf_uri_len) { | |
2308 | len = -EIO; | |
2309 | goto model_error; | |
2310 | } | |
2311 | if (len == 0) { | |
2312 | len = -EPIPE; | |
2313 | goto model_error; | |
2314 | } | |
2315 | if (len < 0) { | |
2316 | goto model_error; | |
2317 | } | |
2318 | /* Enforce end of string */ | |
2319 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
2320 | } | |
2321 | ||
2322 | *signature = a_sign; | |
2323 | *nr_fields = fields_len / sizeof(*a_fields); | |
2324 | *fields = a_fields; | |
2325 | *model_emf_uri = a_model_emf_uri; | |
2326 | ||
2327 | return 0; | |
2328 | ||
2329 | model_error: | |
2330 | free(a_model_emf_uri); | |
2331 | fields_error: | |
2332 | free(a_fields); | |
2333 | signature_error: | |
2334 | free(a_sign); | |
2335 | return len; | |
2336 | } | |
2337 | ||
2338 | /* | |
2339 | * Returns 0 on success, negative error value on error. | |
2340 | */ | |
2341 | int ustctl_reply_register_event(int sock, | |
2342 | uint32_t id, | |
2343 | int ret_code) | |
2344 | { | |
2345 | ssize_t len; | |
2346 | struct { | |
2347 | struct ustcomm_notify_hdr header; | |
2348 | struct ustcomm_notify_event_reply r; | |
2349 | } reply; | |
2350 | ||
2351 | memset(&reply, 0, sizeof(reply)); | |
2352 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
2353 | reply.r.ret_code = ret_code; | |
2354 | reply.r.event_id = id; | |
2355 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2356 | if (len > 0 && len != sizeof(reply)) | |
2357 | return -EIO; | |
2358 | if (len < 0) | |
2359 | return len; | |
2360 | return 0; | |
2361 | } | |
2362 | ||
c785c634 MD |
2363 | /* |
2364 | * Returns 0 on success, negative UST or system error value on error. | |
2365 | */ | |
2366 | int ustctl_recv_register_enum(int sock, | |
2367 | int *session_objd, | |
2368 | char *enum_name, | |
2369 | struct ustctl_enum_entry **entries, | |
2370 | size_t *nr_entries) | |
2371 | { | |
2372 | ssize_t len; | |
2373 | struct ustcomm_notify_enum_msg msg; | |
2374 | size_t entries_len; | |
2375 | struct ustctl_enum_entry *a_entries = NULL; | |
2376 | ||
2377 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2378 | if (len > 0 && len != sizeof(msg)) | |
2379 | return -EIO; | |
2380 | if (len == 0) | |
2381 | return -EPIPE; | |
2382 | if (len < 0) | |
2383 | return len; | |
2384 | ||
2385 | *session_objd = msg.session_objd; | |
2386 | strncpy(enum_name, msg.enum_name, LTTNG_UST_SYM_NAME_LEN); | |
2387 | enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
2388 | entries_len = msg.entries_len; | |
2389 | ||
2390 | if (entries_len % sizeof(*a_entries) != 0) { | |
2391 | return -EINVAL; | |
2392 | } | |
2393 | ||
2394 | /* recv entries */ | |
2395 | if (entries_len) { | |
2396 | a_entries = zmalloc(entries_len); | |
2397 | if (!a_entries) | |
2398 | return -ENOMEM; | |
2399 | len = ustcomm_recv_unix_sock(sock, a_entries, entries_len); | |
2400 | if (len > 0 && len != entries_len) { | |
2401 | len = -EIO; | |
2402 | goto entries_error; | |
2403 | } | |
2404 | if (len == 0) { | |
2405 | len = -EPIPE; | |
2406 | goto entries_error; | |
2407 | } | |
2408 | if (len < 0) { | |
2409 | goto entries_error; | |
2410 | } | |
2411 | } | |
2412 | *nr_entries = entries_len / sizeof(*a_entries); | |
2413 | *entries = a_entries; | |
2414 | ||
2415 | return 0; | |
2416 | ||
2417 | entries_error: | |
2418 | free(a_entries); | |
2419 | return len; | |
2420 | } | |
2421 | ||
2422 | /* | |
2423 | * Returns 0 on success, negative error value on error. | |
2424 | */ | |
2425 | int ustctl_reply_register_enum(int sock, | |
2426 | uint64_t id, | |
2427 | int ret_code) | |
2428 | { | |
2429 | ssize_t len; | |
2430 | struct { | |
2431 | struct ustcomm_notify_hdr header; | |
2432 | struct ustcomm_notify_enum_reply r; | |
2433 | } reply; | |
2434 | ||
2435 | memset(&reply, 0, sizeof(reply)); | |
2436 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
2437 | reply.r.ret_code = ret_code; | |
2438 | reply.r.enum_id = id; | |
2439 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2440 | if (len > 0 && len != sizeof(reply)) | |
2441 | return -EIO; | |
2442 | if (len < 0) | |
2443 | return len; | |
2444 | return 0; | |
2445 | } | |
2446 | ||
32ce8569 MD |
2447 | /* |
2448 | * Returns 0 on success, negative UST or system error value on error. | |
2449 | */ | |
2450 | int ustctl_recv_register_channel(int sock, | |
2451 | int *session_objd, /* session descriptor (output) */ | |
2452 | int *channel_objd, /* channel descriptor (output) */ | |
2453 | size_t *nr_fields, | |
2454 | struct ustctl_field **fields) | |
2455 | { | |
2456 | ssize_t len; | |
2457 | struct ustcomm_notify_channel_msg msg; | |
2458 | size_t fields_len; | |
2459 | struct ustctl_field *a_fields; | |
2460 | ||
2461 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2462 | if (len > 0 && len != sizeof(msg)) | |
2463 | return -EIO; | |
2464 | if (len == 0) | |
2465 | return -EPIPE; | |
2466 | if (len < 0) | |
2467 | return len; | |
2468 | ||
2469 | *session_objd = msg.session_objd; | |
2470 | *channel_objd = msg.channel_objd; | |
2471 | fields_len = msg.ctx_fields_len; | |
2472 | ||
2473 | if (fields_len % sizeof(*a_fields) != 0) { | |
2474 | return -EINVAL; | |
2475 | } | |
2476 | ||
2477 | /* recv fields */ | |
2478 | if (fields_len) { | |
2479 | a_fields = zmalloc(fields_len); | |
2480 | if (!a_fields) { | |
2481 | len = -ENOMEM; | |
2482 | goto alloc_error; | |
2483 | } | |
2484 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2485 | if (len > 0 && len != fields_len) { | |
2486 | len = -EIO; | |
2487 | goto fields_error; | |
2488 | } | |
2489 | if (len == 0) { | |
2490 | len = -EPIPE; | |
2491 | goto fields_error; | |
2492 | } | |
2493 | if (len < 0) { | |
2494 | goto fields_error; | |
2495 | } | |
2496 | *fields = a_fields; | |
2497 | } else { | |
2498 | *fields = NULL; | |
2499 | } | |
2500 | *nr_fields = fields_len / sizeof(*a_fields); | |
2501 | return 0; | |
2502 | ||
2503 | fields_error: | |
2504 | free(a_fields); | |
2505 | alloc_error: | |
2506 | return len; | |
2507 | } | |
2508 | ||
2509 | /* | |
2510 | * Returns 0 on success, negative error value on error. | |
2511 | */ | |
2512 | int ustctl_reply_register_channel(int sock, | |
2513 | uint32_t chan_id, | |
2514 | enum ustctl_channel_header header_type, | |
2515 | int ret_code) | |
2516 | { | |
2517 | ssize_t len; | |
2518 | struct { | |
2519 | struct ustcomm_notify_hdr header; | |
2520 | struct ustcomm_notify_channel_reply r; | |
2521 | } reply; | |
2522 | ||
2523 | memset(&reply, 0, sizeof(reply)); | |
2524 | reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
2525 | reply.r.ret_code = ret_code; | |
2526 | reply.r.chan_id = chan_id; | |
2527 | switch (header_type) { | |
2528 | case USTCTL_CHANNEL_HEADER_COMPACT: | |
2529 | reply.r.header_type = 1; | |
2530 | break; | |
2531 | case USTCTL_CHANNEL_HEADER_LARGE: | |
2532 | reply.r.header_type = 2; | |
2533 | break; | |
2534 | default: | |
2535 | reply.r.header_type = 0; | |
2536 | break; | |
2537 | } | |
2538 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2539 | if (len > 0 && len != sizeof(reply)) | |
2540 | return -EIO; | |
2541 | if (len < 0) | |
2542 | return len; | |
2543 | return 0; | |
2544 | } | |
2545 | ||
f53329f3 JD |
2546 | /* Regenerate the statedump. */ |
2547 | int ustctl_regenerate_statedump(int sock, int handle) | |
2548 | { | |
2549 | struct ustcomm_ust_msg lum; | |
2550 | struct ustcomm_ust_reply lur; | |
2551 | int ret; | |
2552 | ||
2553 | memset(&lum, 0, sizeof(lum)); | |
2554 | lum.handle = handle; | |
2555 | lum.cmd = LTTNG_UST_SESSION_STATEDUMP; | |
2556 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); | |
2557 | if (ret) | |
2558 | return ret; | |
2559 | DBG("Regenerated statedump for handle %u", handle); | |
2560 | return 0; | |
2561 | } | |
2562 | ||
ebabbf58 MD |
2563 | /* counter operations */ |
2564 | ||
2565 | int ustctl_get_nr_cpu_per_counter(void) | |
2566 | { | |
2567 | return lttng_counter_num_possible_cpus(); | |
2568 | } | |
2569 | ||
2570 | struct ustctl_daemon_counter * | |
2571 | ustctl_create_counter(size_t nr_dimensions, | |
2572 | const struct ustctl_counter_dimension *dimensions, | |
2573 | int64_t global_sum_step, | |
2574 | int global_counter_fd, | |
2575 | int nr_counter_cpu_fds, | |
2576 | const int *counter_cpu_fds, | |
2577 | enum ustctl_counter_bitness bitness, | |
2578 | enum ustctl_counter_arithmetic arithmetic, | |
2579 | uint32_t alloc_flags) | |
2580 | { | |
2581 | const char *transport_name; | |
2582 | struct ustctl_daemon_counter *counter; | |
2583 | struct lttng_counter_transport *transport; | |
2584 | struct lttng_counter_dimension ust_dim[LTTNG_COUNTER_DIMENSION_MAX]; | |
2585 | size_t i; | |
2586 | ||
2587 | if (nr_dimensions > LTTNG_COUNTER_DIMENSION_MAX) | |
2588 | return NULL; | |
2589 | /* Currently, only per-cpu allocation is supported. */ | |
2590 | switch (alloc_flags) { | |
2591 | case USTCTL_COUNTER_ALLOC_PER_CPU: | |
2592 | break; | |
2593 | ||
2594 | case USTCTL_COUNTER_ALLOC_PER_CPU | USTCTL_COUNTER_ALLOC_GLOBAL: | |
2595 | case USTCTL_COUNTER_ALLOC_GLOBAL: | |
2596 | default: | |
2597 | return NULL; | |
2598 | } | |
2599 | switch (bitness) { | |
2600 | case USTCTL_COUNTER_BITNESS_32: | |
2601 | switch (arithmetic) { | |
2602 | case USTCTL_COUNTER_ARITHMETIC_MODULAR: | |
2603 | transport_name = "counter-per-cpu-32-modular"; | |
2604 | break; | |
2605 | case USTCTL_COUNTER_ARITHMETIC_SATURATION: | |
2606 | transport_name = "counter-per-cpu-32-saturation"; | |
2607 | break; | |
2608 | default: | |
2609 | return NULL; | |
2610 | } | |
2611 | break; | |
2612 | case USTCTL_COUNTER_BITNESS_64: | |
2613 | switch (arithmetic) { | |
2614 | case USTCTL_COUNTER_ARITHMETIC_MODULAR: | |
2615 | transport_name = "counter-per-cpu-64-modular"; | |
2616 | break; | |
2617 | case USTCTL_COUNTER_ARITHMETIC_SATURATION: | |
2618 | transport_name = "counter-per-cpu-64-saturation"; | |
2619 | break; | |
2620 | default: | |
2621 | return NULL; | |
2622 | } | |
2623 | break; | |
2624 | default: | |
2625 | return NULL; | |
2626 | } | |
2627 | ||
2628 | transport = lttng_counter_transport_find(transport_name); | |
2629 | if (!transport) { | |
2630 | DBG("LTTng transport %s not found\n", | |
2631 | transport_name); | |
2632 | return NULL; | |
2633 | } | |
2634 | ||
2635 | counter = zmalloc(sizeof(*counter)); | |
2636 | if (!counter) | |
2637 | return NULL; | |
2638 | counter->attr = zmalloc(sizeof(*counter->attr)); | |
2639 | if (!counter->attr) | |
2640 | goto free_counter; | |
2641 | counter->attr->bitness = bitness; | |
2642 | counter->attr->arithmetic = arithmetic; | |
2643 | counter->attr->nr_dimensions = nr_dimensions; | |
2644 | counter->attr->global_sum_step = global_sum_step; | |
2645 | for (i = 0; i < nr_dimensions; i++) | |
2646 | counter->attr->dimensions[i] = dimensions[i]; | |
2647 | ||
2648 | for (i = 0; i < nr_dimensions; i++) { | |
2649 | ust_dim[i].size = dimensions[i].size; | |
2650 | ust_dim[i].underflow_index = dimensions[i].underflow_index; | |
2651 | ust_dim[i].overflow_index = dimensions[i].overflow_index; | |
2652 | ust_dim[i].has_underflow = dimensions[i].has_underflow; | |
2653 | ust_dim[i].has_overflow = dimensions[i].has_overflow; | |
2654 | } | |
2655 | counter->counter = transport->ops.counter_create(nr_dimensions, | |
2656 | ust_dim, global_sum_step, global_counter_fd, | |
2657 | nr_counter_cpu_fds, counter_cpu_fds, true); | |
2658 | if (!counter->counter) | |
2659 | goto free_attr; | |
2660 | counter->ops = &transport->ops; | |
2661 | return counter; | |
2662 | ||
2663 | free_attr: | |
2664 | free(counter->attr); | |
2665 | free_counter: | |
2666 | free(counter); | |
2667 | return NULL; | |
2668 | } | |
2669 | ||
2670 | int ustctl_create_counter_data(struct ustctl_daemon_counter *counter, | |
2671 | struct lttng_ust_object_data **_counter_data) | |
2672 | { | |
2673 | struct lttng_ust_object_data *counter_data; | |
dca92811 | 2674 | struct lttng_ust_counter_conf counter_conf = {0}; |
ebabbf58 MD |
2675 | size_t i; |
2676 | int ret; | |
2677 | ||
2678 | switch (counter->attr->arithmetic) { | |
2679 | case USTCTL_COUNTER_ARITHMETIC_MODULAR: | |
2680 | counter_conf.arithmetic = LTTNG_UST_COUNTER_ARITHMETIC_MODULAR; | |
2681 | break; | |
2682 | case USTCTL_COUNTER_ARITHMETIC_SATURATION: | |
2683 | counter_conf.arithmetic = LTTNG_UST_COUNTER_ARITHMETIC_SATURATION; | |
2684 | break; | |
2685 | default: | |
2686 | return -EINVAL; | |
2687 | } | |
2688 | switch (counter->attr->bitness) { | |
2689 | case USTCTL_COUNTER_BITNESS_32: | |
38980ed1 | 2690 | counter_conf.bitness = LTTNG_UST_COUNTER_BITNESS_32; |
ebabbf58 MD |
2691 | break; |
2692 | case USTCTL_COUNTER_BITNESS_64: | |
38980ed1 | 2693 | counter_conf.bitness = LTTNG_UST_COUNTER_BITNESS_64; |
ebabbf58 MD |
2694 | break; |
2695 | default: | |
2696 | return -EINVAL; | |
2697 | } | |
2698 | counter_conf.number_dimensions = counter->attr->nr_dimensions; | |
2699 | counter_conf.global_sum_step = counter->attr->global_sum_step; | |
2700 | for (i = 0; i < counter->attr->nr_dimensions; i++) { | |
2701 | counter_conf.dimensions[i].size = counter->attr->dimensions[i].size; | |
2702 | counter_conf.dimensions[i].underflow_index = counter->attr->dimensions[i].underflow_index; | |
2703 | counter_conf.dimensions[i].overflow_index = counter->attr->dimensions[i].overflow_index; | |
2704 | counter_conf.dimensions[i].has_underflow = counter->attr->dimensions[i].has_underflow; | |
2705 | counter_conf.dimensions[i].has_overflow = counter->attr->dimensions[i].has_overflow; | |
2706 | } | |
2707 | ||
2708 | counter_data = zmalloc(sizeof(*counter_data)); | |
2709 | if (!counter_data) { | |
2710 | ret = -ENOMEM; | |
2711 | goto error_alloc; | |
2712 | } | |
2713 | counter_data->type = LTTNG_UST_OBJECT_TYPE_COUNTER; | |
2714 | counter_data->handle = -1; | |
2715 | ||
2716 | counter_data->size = sizeof(counter_conf); | |
2717 | counter_data->u.counter.data = zmalloc(sizeof(counter_conf)); | |
2718 | if (!counter_data->u.counter.data) { | |
2719 | ret = -ENOMEM; | |
2720 | goto error_alloc_data; | |
2721 | } | |
2722 | ||
2723 | memcpy(counter_data->u.counter.data, &counter_conf, sizeof(counter_conf)); | |
2724 | *_counter_data = counter_data; | |
2725 | ||
2726 | return 0; | |
2727 | ||
2728 | error_alloc_data: | |
2729 | free(counter_data); | |
2730 | error_alloc: | |
2731 | return ret; | |
2732 | } | |
2733 | ||
2734 | int ustctl_create_counter_global_data(struct ustctl_daemon_counter *counter, | |
2735 | struct lttng_ust_object_data **_counter_global_data) | |
2736 | { | |
2737 | struct lttng_ust_object_data *counter_global_data; | |
2738 | int ret, fd; | |
2739 | size_t len; | |
2740 | ||
2741 | if (lttng_counter_get_global_shm(counter->counter, &fd, &len)) | |
2742 | return -EINVAL; | |
2743 | counter_global_data = zmalloc(sizeof(*counter_global_data)); | |
2744 | if (!counter_global_data) { | |
2745 | ret = -ENOMEM; | |
2746 | goto error_alloc; | |
2747 | } | |
2748 | counter_global_data->type = LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL; | |
2749 | counter_global_data->handle = -1; | |
2750 | counter_global_data->size = len; | |
2751 | counter_global_data->u.counter_global.shm_fd = fd; | |
2752 | *_counter_global_data = counter_global_data; | |
2753 | return 0; | |
2754 | ||
2755 | error_alloc: | |
2756 | return ret; | |
2757 | } | |
2758 | ||
2759 | int ustctl_create_counter_cpu_data(struct ustctl_daemon_counter *counter, int cpu, | |
2760 | struct lttng_ust_object_data **_counter_cpu_data) | |
2761 | { | |
2762 | struct lttng_ust_object_data *counter_cpu_data; | |
2763 | int ret, fd; | |
2764 | size_t len; | |
2765 | ||
2766 | if (lttng_counter_get_cpu_shm(counter->counter, cpu, &fd, &len)) | |
2767 | return -EINVAL; | |
2768 | counter_cpu_data = zmalloc(sizeof(*counter_cpu_data)); | |
2769 | if (!counter_cpu_data) { | |
2770 | ret = -ENOMEM; | |
2771 | goto error_alloc; | |
2772 | } | |
2773 | counter_cpu_data->type = LTTNG_UST_OBJECT_TYPE_COUNTER_CPU; | |
2774 | counter_cpu_data->handle = -1; | |
2775 | counter_cpu_data->size = len; | |
2776 | counter_cpu_data->u.counter_cpu.shm_fd = fd; | |
2777 | counter_cpu_data->u.counter_cpu.cpu_nr = cpu; | |
2778 | *_counter_cpu_data = counter_cpu_data; | |
2779 | return 0; | |
2780 | ||
2781 | error_alloc: | |
2782 | return ret; | |
2783 | } | |
2784 | ||
2785 | void ustctl_destroy_counter(struct ustctl_daemon_counter *counter) | |
2786 | { | |
2787 | counter->ops->counter_destroy(counter->counter); | |
2788 | free(counter->attr); | |
2789 | free(counter); | |
2790 | } | |
2791 | ||
2792 | int ustctl_send_counter_data_to_ust(int sock, int parent_handle, | |
2793 | struct lttng_ust_object_data *counter_data) | |
2794 | { | |
2795 | struct ustcomm_ust_msg lum; | |
2796 | struct ustcomm_ust_reply lur; | |
2797 | int ret; | |
2798 | size_t size; | |
2799 | ssize_t len; | |
2800 | ||
2801 | if (!counter_data) | |
2802 | return -EINVAL; | |
2803 | ||
2804 | size = counter_data->size; | |
2805 | memset(&lum, 0, sizeof(lum)); | |
2806 | lum.handle = parent_handle; | |
2807 | lum.cmd = LTTNG_UST_COUNTER; | |
2808 | lum.u.counter.len = size; | |
2809 | ret = ustcomm_send_app_msg(sock, &lum); | |
2810 | if (ret) | |
2811 | return ret; | |
2812 | ||
2813 | /* Send counter data */ | |
2814 | len = ustcomm_send_unix_sock(sock, counter_data->u.counter.data, size); | |
2815 | if (len != size) { | |
2816 | if (len < 0) | |
2817 | return len; | |
2818 | else | |
2819 | return -EIO; | |
2820 | } | |
2821 | ||
2822 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
2823 | if (!ret) { | |
2824 | counter_data->handle = lur.ret_val; | |
2825 | } | |
2826 | return ret; | |
2827 | } | |
2828 | ||
2829 | int ustctl_send_counter_global_data_to_ust(int sock, | |
2830 | struct lttng_ust_object_data *counter_data, | |
2831 | struct lttng_ust_object_data *counter_global_data) | |
2832 | { | |
2833 | struct ustcomm_ust_msg lum; | |
2834 | struct ustcomm_ust_reply lur; | |
2835 | int ret, shm_fd[1]; | |
2836 | size_t size; | |
2837 | ssize_t len; | |
2838 | ||
2839 | if (!counter_data || !counter_global_data) | |
2840 | return -EINVAL; | |
2841 | ||
2842 | size = counter_global_data->size; | |
2843 | memset(&lum, 0, sizeof(lum)); | |
2844 | lum.handle = counter_data->handle; /* parent handle */ | |
2845 | lum.cmd = LTTNG_UST_COUNTER_GLOBAL; | |
2846 | lum.u.counter_global.len = size; | |
2847 | ret = ustcomm_send_app_msg(sock, &lum); | |
2848 | if (ret) | |
2849 | return ret; | |
2850 | ||
2851 | shm_fd[0] = counter_global_data->u.counter_global.shm_fd; | |
2852 | len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1); | |
2853 | if (len <= 0) { | |
2854 | if (len < 0) | |
2855 | return len; | |
2856 | else | |
2857 | return -EIO; | |
2858 | } | |
2859 | ||
2860 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
2861 | if (!ret) { | |
2862 | counter_global_data->handle = lur.ret_val; | |
2863 | } | |
2864 | return ret; | |
2865 | } | |
2866 | ||
2867 | int ustctl_send_counter_cpu_data_to_ust(int sock, | |
2868 | struct lttng_ust_object_data *counter_data, | |
2869 | struct lttng_ust_object_data *counter_cpu_data) | |
2870 | { | |
2871 | struct ustcomm_ust_msg lum; | |
2872 | struct ustcomm_ust_reply lur; | |
2873 | int ret, shm_fd[1]; | |
2874 | size_t size; | |
2875 | ssize_t len; | |
2876 | ||
2877 | if (!counter_data || !counter_cpu_data) | |
2878 | return -EINVAL; | |
2879 | ||
2880 | size = counter_cpu_data->size; | |
2881 | memset(&lum, 0, sizeof(lum)); | |
2882 | lum.handle = counter_data->handle; /* parent handle */ | |
2883 | lum.cmd = LTTNG_UST_COUNTER_CPU; | |
2884 | lum.u.counter_cpu.len = size; | |
2885 | lum.u.counter_cpu.cpu_nr = counter_cpu_data->u.counter_cpu.cpu_nr; | |
2886 | ret = ustcomm_send_app_msg(sock, &lum); | |
2887 | if (ret) | |
2888 | return ret; | |
2889 | ||
2890 | shm_fd[0] = counter_cpu_data->u.counter_global.shm_fd; | |
2891 | len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1); | |
2892 | if (len <= 0) { | |
2893 | if (len < 0) | |
2894 | return len; | |
2895 | else | |
2896 | return -EIO; | |
2897 | } | |
2898 | ||
2899 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
2900 | if (!ret) { | |
2901 | counter_cpu_data->handle = lur.ret_val; | |
2902 | } | |
2903 | return ret; | |
2904 | } | |
2905 | ||
2906 | int ustctl_counter_read(struct ustctl_daemon_counter *counter, | |
2907 | const size_t *dimension_indexes, | |
2908 | int cpu, int64_t *value, | |
2909 | bool *overflow, bool *underflow) | |
2910 | { | |
2911 | return counter->ops->counter_read(counter->counter, dimension_indexes, cpu, | |
2912 | value, overflow, underflow); | |
2913 | } | |
2914 | ||
2915 | int ustctl_counter_aggregate(struct ustctl_daemon_counter *counter, | |
2916 | const size_t *dimension_indexes, | |
2917 | int64_t *value, | |
2918 | bool *overflow, bool *underflow) | |
2919 | { | |
2920 | return counter->ops->counter_aggregate(counter->counter, dimension_indexes, | |
2921 | value, overflow, underflow); | |
2922 | } | |
2923 | ||
2924 | int ustctl_counter_clear(struct ustctl_daemon_counter *counter, | |
2925 | const size_t *dimension_indexes) | |
2926 | { | |
2927 | return counter->ops->counter_clear(counter->counter, dimension_indexes); | |
2928 | } | |
2929 | ||
74d81a6c MD |
2930 | static __attribute__((constructor)) |
2931 | void ustctl_init(void) | |
2932 | { | |
2933 | init_usterr(); | |
6f626d28 | 2934 | lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */ |
f9364363 | 2935 | lttng_ust_clock_init(); |
74d81a6c MD |
2936 | lttng_ring_buffer_metadata_client_init(); |
2937 | lttng_ring_buffer_client_overwrite_init(); | |
34a91bdb | 2938 | lttng_ring_buffer_client_overwrite_rt_init(); |
74d81a6c | 2939 | lttng_ring_buffer_client_discard_init(); |
34a91bdb | 2940 | lttng_ring_buffer_client_discard_rt_init(); |
ebabbf58 MD |
2941 | lttng_counter_client_percpu_32_modular_init(); |
2942 | lttng_counter_client_percpu_64_modular_init(); | |
03d2d293 | 2943 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
2944 | } |
2945 | ||
2946 | static __attribute__((destructor)) | |
2947 | void ustctl_exit(void) | |
2948 | { | |
34a91bdb | 2949 | lttng_ring_buffer_client_discard_rt_exit(); |
74d81a6c | 2950 | lttng_ring_buffer_client_discard_exit(); |
34a91bdb | 2951 | lttng_ring_buffer_client_overwrite_rt_exit(); |
74d81a6c MD |
2952 | lttng_ring_buffer_client_overwrite_exit(); |
2953 | lttng_ring_buffer_metadata_client_exit(); | |
ebabbf58 MD |
2954 | lttng_counter_client_percpu_32_modular_exit(); |
2955 | lttng_counter_client_percpu_64_modular_exit(); | |
57773204 | 2956 | } |