| 1 | /* |
| 2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> |
| 3 | * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 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. |
| 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 | * |
| 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. |
| 17 | */ |
| 18 | |
| 19 | #define _GNU_SOURCE |
| 20 | #include <string.h> |
| 21 | #include <lttng/ust-ctl.h> |
| 22 | #include <lttng/ust-abi.h> |
| 23 | #include <lttng/ust-events.h> |
| 24 | #include <sys/mman.h> |
| 25 | |
| 26 | #include <usterr-signal-safe.h> |
| 27 | #include <ust-comm.h> |
| 28 | #include <helper.h> |
| 29 | |
| 30 | #include "../libringbuffer/backend.h" |
| 31 | #include "../libringbuffer/frontend.h" |
| 32 | |
| 33 | /* |
| 34 | * Channel representation within consumer. |
| 35 | */ |
| 36 | struct ustctl_consumer_channel { |
| 37 | struct lttng_channel *chan; /* lttng channel buffers */ |
| 38 | |
| 39 | /* initial attributes */ |
| 40 | struct ustctl_consumer_channel_attr attr; |
| 41 | }; |
| 42 | |
| 43 | /* |
| 44 | * Stream representation within consumer. |
| 45 | */ |
| 46 | struct ustctl_consumer_stream { |
| 47 | struct lttng_ust_shm_handle *handle; /* shared-memory handle */ |
| 48 | struct lttng_ust_lib_ring_buffer *buf; |
| 49 | struct ustctl_consumer_channel *chan; |
| 50 | int shm_fd, wait_fd, wakeup_fd; |
| 51 | int cpu; |
| 52 | uint64_t memory_map_size; |
| 53 | }; |
| 54 | |
| 55 | extern void lttng_ring_buffer_client_overwrite_init(void); |
| 56 | extern void lttng_ring_buffer_client_discard_init(void); |
| 57 | extern void lttng_ring_buffer_metadata_client_init(void); |
| 58 | extern void lttng_ring_buffer_client_overwrite_exit(void); |
| 59 | extern void lttng_ring_buffer_client_discard_exit(void); |
| 60 | extern void lttng_ring_buffer_metadata_client_exit(void); |
| 61 | |
| 62 | volatile enum ust_loglevel ust_loglevel; |
| 63 | |
| 64 | int ustctl_release_handle(int sock, int handle) |
| 65 | { |
| 66 | struct ustcomm_ust_msg lum; |
| 67 | struct ustcomm_ust_reply lur; |
| 68 | |
| 69 | if (sock < 0 || handle < 0) |
| 70 | return 0; |
| 71 | memset(&lum, 0, sizeof(lum)); |
| 72 | lum.handle = handle; |
| 73 | lum.cmd = LTTNG_UST_RELEASE; |
| 74 | return ustcomm_send_app_cmd(sock, &lum, &lur); |
| 75 | } |
| 76 | |
| 77 | /* |
| 78 | * If sock is negative, it means we don't have to notify the other side |
| 79 | * (e.g. application has already vanished). |
| 80 | */ |
| 81 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data) |
| 82 | { |
| 83 | int ret; |
| 84 | |
| 85 | if (!data) |
| 86 | return -EINVAL; |
| 87 | |
| 88 | switch (data->type) { |
| 89 | case LTTNG_UST_OBJECT_TYPE_CHANNEL: |
| 90 | free(data->u.channel.data); |
| 91 | break; |
| 92 | case LTTNG_UST_OBJECT_TYPE_STREAM: |
| 93 | if (data->u.stream.shm_fd >= 0) { |
| 94 | ret = close(data->u.stream.shm_fd); |
| 95 | if (ret < 0) { |
| 96 | ret = -errno; |
| 97 | return ret; |
| 98 | } |
| 99 | } |
| 100 | if (data->u.stream.wakeup_fd >= 0) { |
| 101 | ret = close(data->u.stream.wakeup_fd); |
| 102 | if (ret < 0) { |
| 103 | ret = -errno; |
| 104 | return ret; |
| 105 | } |
| 106 | } |
| 107 | break; |
| 108 | default: |
| 109 | assert(0); |
| 110 | } |
| 111 | return ustctl_release_handle(sock, data->handle); |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * Send registration done packet to the application. |
| 116 | */ |
| 117 | int ustctl_register_done(int sock) |
| 118 | { |
| 119 | struct ustcomm_ust_msg lum; |
| 120 | struct ustcomm_ust_reply lur; |
| 121 | int ret; |
| 122 | |
| 123 | DBG("Sending register done command to %d", sock); |
| 124 | memset(&lum, 0, sizeof(lum)); |
| 125 | lum.handle = LTTNG_UST_ROOT_HANDLE; |
| 126 | lum.cmd = LTTNG_UST_REGISTER_DONE; |
| 127 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 128 | if (ret) |
| 129 | return ret; |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * returns session handle. |
| 135 | */ |
| 136 | int ustctl_create_session(int sock) |
| 137 | { |
| 138 | struct ustcomm_ust_msg lum; |
| 139 | struct ustcomm_ust_reply lur; |
| 140 | int ret, session_handle; |
| 141 | |
| 142 | /* Create session */ |
| 143 | memset(&lum, 0, sizeof(lum)); |
| 144 | lum.handle = LTTNG_UST_ROOT_HANDLE; |
| 145 | lum.cmd = LTTNG_UST_SESSION; |
| 146 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 147 | if (ret) |
| 148 | return ret; |
| 149 | session_handle = lur.ret_val; |
| 150 | DBG("received session handle %u", session_handle); |
| 151 | return session_handle; |
| 152 | } |
| 153 | |
| 154 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
| 155 | struct lttng_ust_object_data *channel_data, |
| 156 | struct lttng_ust_object_data **_event_data) |
| 157 | { |
| 158 | struct ustcomm_ust_msg lum; |
| 159 | struct ustcomm_ust_reply lur; |
| 160 | struct lttng_ust_object_data *event_data; |
| 161 | int ret; |
| 162 | |
| 163 | if (!channel_data || !_event_data) |
| 164 | return -EINVAL; |
| 165 | |
| 166 | event_data = zmalloc(sizeof(*event_data)); |
| 167 | if (!event_data) |
| 168 | return -ENOMEM; |
| 169 | memset(&lum, 0, sizeof(lum)); |
| 170 | lum.handle = channel_data->handle; |
| 171 | lum.cmd = LTTNG_UST_EVENT; |
| 172 | strncpy(lum.u.event.name, ev->name, |
| 173 | LTTNG_UST_SYM_NAME_LEN); |
| 174 | lum.u.event.instrumentation = ev->instrumentation; |
| 175 | lum.u.event.loglevel_type = ev->loglevel_type; |
| 176 | lum.u.event.loglevel = ev->loglevel; |
| 177 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 178 | if (ret) { |
| 179 | free(event_data); |
| 180 | return ret; |
| 181 | } |
| 182 | event_data->handle = lur.ret_val; |
| 183 | DBG("received event handle %u", event_data->handle); |
| 184 | *_event_data = event_data; |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | int ustctl_add_context(int sock, struct lttng_ust_context *ctx, |
| 189 | struct lttng_ust_object_data *obj_data, |
| 190 | struct lttng_ust_object_data **_context_data) |
| 191 | { |
| 192 | struct ustcomm_ust_msg lum; |
| 193 | struct ustcomm_ust_reply lur; |
| 194 | struct lttng_ust_object_data *context_data; |
| 195 | int ret; |
| 196 | |
| 197 | if (!obj_data || !_context_data) |
| 198 | return -EINVAL; |
| 199 | |
| 200 | context_data = zmalloc(sizeof(*context_data)); |
| 201 | if (!context_data) |
| 202 | return -ENOMEM; |
| 203 | memset(&lum, 0, sizeof(lum)); |
| 204 | lum.handle = obj_data->handle; |
| 205 | lum.cmd = LTTNG_UST_CONTEXT; |
| 206 | lum.u.context.ctx = ctx->ctx; |
| 207 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 208 | if (ret) { |
| 209 | free(context_data); |
| 210 | return ret; |
| 211 | } |
| 212 | context_data->handle = lur.ret_val; |
| 213 | DBG("received context handle %u", context_data->handle); |
| 214 | *_context_data = context_data; |
| 215 | return ret; |
| 216 | } |
| 217 | |
| 218 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
| 219 | struct lttng_ust_object_data *obj_data) |
| 220 | { |
| 221 | struct ustcomm_ust_msg lum; |
| 222 | struct ustcomm_ust_reply lur; |
| 223 | int ret; |
| 224 | |
| 225 | if (!obj_data) |
| 226 | return -EINVAL; |
| 227 | |
| 228 | memset(&lum, 0, sizeof(lum)); |
| 229 | lum.handle = obj_data->handle; |
| 230 | lum.cmd = LTTNG_UST_FILTER; |
| 231 | lum.u.filter.data_size = bytecode->len; |
| 232 | lum.u.filter.reloc_offset = bytecode->reloc_offset; |
| 233 | lum.u.filter.seqnum = bytecode->seqnum; |
| 234 | |
| 235 | ret = ustcomm_send_app_msg(sock, &lum); |
| 236 | if (ret) |
| 237 | return ret; |
| 238 | /* send var len bytecode */ |
| 239 | ret = ustcomm_send_unix_sock(sock, bytecode->data, |
| 240 | bytecode->len); |
| 241 | if (ret < 0) { |
| 242 | if (ret == -ECONNRESET) |
| 243 | fprintf(stderr, "remote end closed connection\n"); |
| 244 | return ret; |
| 245 | } |
| 246 | if (ret != bytecode->len) |
| 247 | return -EINVAL; |
| 248 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 249 | } |
| 250 | |
| 251 | /* Enable event, channel and session ioctl */ |
| 252 | int ustctl_enable(int sock, struct lttng_ust_object_data *object) |
| 253 | { |
| 254 | struct ustcomm_ust_msg lum; |
| 255 | struct ustcomm_ust_reply lur; |
| 256 | int ret; |
| 257 | |
| 258 | if (!object) |
| 259 | return -EINVAL; |
| 260 | |
| 261 | memset(&lum, 0, sizeof(lum)); |
| 262 | lum.handle = object->handle; |
| 263 | lum.cmd = LTTNG_UST_ENABLE; |
| 264 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 265 | if (ret) |
| 266 | return ret; |
| 267 | DBG("enabled handle %u", object->handle); |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | /* Disable event, channel and session ioctl */ |
| 272 | int ustctl_disable(int sock, struct lttng_ust_object_data *object) |
| 273 | { |
| 274 | struct ustcomm_ust_msg lum; |
| 275 | struct ustcomm_ust_reply lur; |
| 276 | int ret; |
| 277 | |
| 278 | if (!object) |
| 279 | return -EINVAL; |
| 280 | |
| 281 | memset(&lum, 0, sizeof(lum)); |
| 282 | lum.handle = object->handle; |
| 283 | lum.cmd = LTTNG_UST_DISABLE; |
| 284 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 285 | if (ret) |
| 286 | return ret; |
| 287 | DBG("disable handle %u", object->handle); |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | int ustctl_start_session(int sock, int handle) |
| 292 | { |
| 293 | struct lttng_ust_object_data obj; |
| 294 | |
| 295 | obj.handle = handle; |
| 296 | return ustctl_enable(sock, &obj); |
| 297 | } |
| 298 | |
| 299 | int ustctl_stop_session(int sock, int handle) |
| 300 | { |
| 301 | struct lttng_ust_object_data obj; |
| 302 | |
| 303 | obj.handle = handle; |
| 304 | return ustctl_disable(sock, &obj); |
| 305 | } |
| 306 | |
| 307 | int ustctl_tracepoint_list(int sock) |
| 308 | { |
| 309 | struct ustcomm_ust_msg lum; |
| 310 | struct ustcomm_ust_reply lur; |
| 311 | int ret, tp_list_handle; |
| 312 | |
| 313 | memset(&lum, 0, sizeof(lum)); |
| 314 | lum.handle = LTTNG_UST_ROOT_HANDLE; |
| 315 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST; |
| 316 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 317 | if (ret) |
| 318 | return ret; |
| 319 | tp_list_handle = lur.ret_val; |
| 320 | DBG("received tracepoint list handle %u", tp_list_handle); |
| 321 | return tp_list_handle; |
| 322 | } |
| 323 | |
| 324 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, |
| 325 | struct lttng_ust_tracepoint_iter *iter) |
| 326 | { |
| 327 | struct ustcomm_ust_msg lum; |
| 328 | struct ustcomm_ust_reply lur; |
| 329 | int ret; |
| 330 | |
| 331 | if (!iter) |
| 332 | return -EINVAL; |
| 333 | |
| 334 | memset(&lum, 0, sizeof(lum)); |
| 335 | lum.handle = tp_list_handle; |
| 336 | lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET; |
| 337 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 338 | if (ret) |
| 339 | return ret; |
| 340 | DBG("received tracepoint list entry name %s loglevel %d", |
| 341 | lur.u.tracepoint.name, |
| 342 | lur.u.tracepoint.loglevel); |
| 343 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | int ustctl_tracepoint_field_list(int sock) |
| 348 | { |
| 349 | struct ustcomm_ust_msg lum; |
| 350 | struct ustcomm_ust_reply lur; |
| 351 | int ret, tp_field_list_handle; |
| 352 | |
| 353 | memset(&lum, 0, sizeof(lum)); |
| 354 | lum.handle = LTTNG_UST_ROOT_HANDLE; |
| 355 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST; |
| 356 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 357 | if (ret) |
| 358 | return ret; |
| 359 | tp_field_list_handle = lur.ret_val; |
| 360 | DBG("received tracepoint field list handle %u", tp_field_list_handle); |
| 361 | return tp_field_list_handle; |
| 362 | } |
| 363 | |
| 364 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, |
| 365 | struct lttng_ust_field_iter *iter) |
| 366 | { |
| 367 | struct ustcomm_ust_msg lum; |
| 368 | struct ustcomm_ust_reply lur; |
| 369 | int ret; |
| 370 | ssize_t len; |
| 371 | |
| 372 | if (!iter) |
| 373 | return -EINVAL; |
| 374 | |
| 375 | memset(&lum, 0, sizeof(lum)); |
| 376 | lum.handle = tp_field_list_handle; |
| 377 | lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET; |
| 378 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 379 | if (ret) |
| 380 | return ret; |
| 381 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); |
| 382 | if (len != sizeof(*iter)) { |
| 383 | return -EINVAL; |
| 384 | } |
| 385 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", |
| 386 | iter->event_name, |
| 387 | iter->loglevel, |
| 388 | iter->field_name, |
| 389 | iter->type); |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v) |
| 394 | { |
| 395 | struct ustcomm_ust_msg lum; |
| 396 | struct ustcomm_ust_reply lur; |
| 397 | int ret; |
| 398 | |
| 399 | if (!v) |
| 400 | return -EINVAL; |
| 401 | |
| 402 | memset(&lum, 0, sizeof(lum)); |
| 403 | lum.handle = LTTNG_UST_ROOT_HANDLE; |
| 404 | lum.cmd = LTTNG_UST_TRACER_VERSION; |
| 405 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 406 | if (ret) |
| 407 | return ret; |
| 408 | memcpy(v, &lur.u.version, sizeof(*v)); |
| 409 | DBG("received tracer version"); |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | int ustctl_wait_quiescent(int sock) |
| 414 | { |
| 415 | struct ustcomm_ust_msg lum; |
| 416 | struct ustcomm_ust_reply lur; |
| 417 | int ret; |
| 418 | |
| 419 | memset(&lum, 0, sizeof(lum)); |
| 420 | lum.handle = LTTNG_UST_ROOT_HANDLE; |
| 421 | lum.cmd = LTTNG_UST_WAIT_QUIESCENT; |
| 422 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 423 | if (ret) |
| 424 | return ret; |
| 425 | DBG("waited for quiescent state"); |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate) |
| 430 | { |
| 431 | if (!calibrate) |
| 432 | return -EINVAL; |
| 433 | |
| 434 | return -ENOSYS; |
| 435 | } |
| 436 | |
| 437 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object) |
| 438 | { |
| 439 | struct ustcomm_ust_msg lum; |
| 440 | struct ustcomm_ust_reply lur; |
| 441 | int ret; |
| 442 | |
| 443 | if (!object) |
| 444 | return -EINVAL; |
| 445 | |
| 446 | memset(&lum, 0, sizeof(lum)); |
| 447 | lum.handle = object->handle; |
| 448 | lum.cmd = LTTNG_UST_FLUSH_BUFFER; |
| 449 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 450 | if (ret) |
| 451 | return ret; |
| 452 | DBG("flushed buffer handle %u", object->handle); |
| 453 | return 0; |
| 454 | } |
| 455 | |
| 456 | static |
| 457 | int ustctl_send_channel(int sock, |
| 458 | enum lttng_ust_chan_type type, |
| 459 | void *data, |
| 460 | uint64_t size, |
| 461 | int send_fd_only) |
| 462 | { |
| 463 | ssize_t len; |
| 464 | |
| 465 | if (!send_fd_only) { |
| 466 | /* Send mmap size */ |
| 467 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); |
| 468 | if (len != sizeof(size)) { |
| 469 | if (len < 0) |
| 470 | return len; |
| 471 | else |
| 472 | return -EIO; |
| 473 | } |
| 474 | |
| 475 | /* Send channel type */ |
| 476 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); |
| 477 | if (len != sizeof(type)) { |
| 478 | if (len < 0) |
| 479 | return len; |
| 480 | else |
| 481 | return -EIO; |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | /* Send channel data */ |
| 486 | len = ustcomm_send_unix_sock(sock, data, size); |
| 487 | if (len != size) { |
| 488 | if (len < 0) |
| 489 | return len; |
| 490 | else |
| 491 | return -EIO; |
| 492 | } |
| 493 | |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | static |
| 498 | int ustctl_send_stream(int sock, |
| 499 | uint32_t stream_nr, |
| 500 | uint64_t memory_map_size, |
| 501 | int shm_fd, int wakeup_fd, |
| 502 | int send_fd_only) |
| 503 | { |
| 504 | ssize_t len; |
| 505 | int fds[2]; |
| 506 | |
| 507 | if (!send_fd_only) { |
| 508 | if (shm_fd < 0) { |
| 509 | /* finish iteration */ |
| 510 | uint64_t v = -1; |
| 511 | |
| 512 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); |
| 513 | if (len != sizeof(v)) { |
| 514 | if (len < 0) |
| 515 | return len; |
| 516 | else |
| 517 | return -EIO; |
| 518 | } |
| 519 | return 0; |
| 520 | } |
| 521 | |
| 522 | /* Send mmap size */ |
| 523 | len = ustcomm_send_unix_sock(sock, &memory_map_size, |
| 524 | sizeof(memory_map_size)); |
| 525 | if (len != sizeof(memory_map_size)) { |
| 526 | if (len < 0) |
| 527 | return len; |
| 528 | else |
| 529 | return -EIO; |
| 530 | } |
| 531 | |
| 532 | /* Send stream nr */ |
| 533 | len = ustcomm_send_unix_sock(sock, &stream_nr, |
| 534 | sizeof(stream_nr)); |
| 535 | if (len != sizeof(stream_nr)) { |
| 536 | if (len < 0) |
| 537 | return len; |
| 538 | else |
| 539 | return -EIO; |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | /* Send shm fd and wakeup fd */ |
| 544 | fds[0] = shm_fd; |
| 545 | fds[1] = wakeup_fd; |
| 546 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); |
| 547 | if (len <= 0) { |
| 548 | if (len < 0) |
| 549 | return len; |
| 550 | else |
| 551 | return -EIO; |
| 552 | } |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | int ustctl_recv_channel_from_consumer(int sock, |
| 557 | struct lttng_ust_object_data **_channel_data) |
| 558 | { |
| 559 | struct lttng_ust_object_data *channel_data; |
| 560 | ssize_t len; |
| 561 | int ret; |
| 562 | |
| 563 | channel_data = zmalloc(sizeof(*channel_data)); |
| 564 | if (!channel_data) { |
| 565 | ret = -ENOMEM; |
| 566 | goto error_alloc; |
| 567 | } |
| 568 | channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL; |
| 569 | |
| 570 | /* recv mmap size */ |
| 571 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, |
| 572 | sizeof(channel_data->size)); |
| 573 | if (len != sizeof(channel_data->size)) { |
| 574 | if (len < 0) |
| 575 | ret = len; |
| 576 | else |
| 577 | ret = -EINVAL; |
| 578 | goto error; |
| 579 | } |
| 580 | |
| 581 | /* recv channel type */ |
| 582 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, |
| 583 | sizeof(channel_data->u.channel.type)); |
| 584 | if (len != sizeof(channel_data->u.channel.type)) { |
| 585 | if (len < 0) |
| 586 | ret = len; |
| 587 | else |
| 588 | ret = -EINVAL; |
| 589 | goto error; |
| 590 | } |
| 591 | |
| 592 | /* recv channel data */ |
| 593 | channel_data->u.channel.data = zmalloc(channel_data->size); |
| 594 | if (!channel_data->u.channel.data) { |
| 595 | ret = -ENOMEM; |
| 596 | goto error; |
| 597 | } |
| 598 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, |
| 599 | channel_data->size); |
| 600 | if (len != channel_data->size) { |
| 601 | if (len < 0) |
| 602 | ret = len; |
| 603 | else |
| 604 | ret = -EINVAL; |
| 605 | goto error_recv_data; |
| 606 | } |
| 607 | |
| 608 | *_channel_data = channel_data; |
| 609 | return 0; |
| 610 | |
| 611 | error_recv_data: |
| 612 | free(channel_data->u.channel.data); |
| 613 | error: |
| 614 | free(channel_data); |
| 615 | error_alloc: |
| 616 | return ret; |
| 617 | } |
| 618 | |
| 619 | int ustctl_recv_stream_from_consumer(int sock, |
| 620 | struct lttng_ust_object_data **_stream_data) |
| 621 | { |
| 622 | struct lttng_ust_object_data *stream_data; |
| 623 | ssize_t len; |
| 624 | int ret; |
| 625 | int fds[2]; |
| 626 | |
| 627 | stream_data = zmalloc(sizeof(*stream_data)); |
| 628 | if (!stream_data) { |
| 629 | ret = -ENOMEM; |
| 630 | goto error_alloc; |
| 631 | } |
| 632 | |
| 633 | stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM; |
| 634 | stream_data->handle = -1; |
| 635 | |
| 636 | /* recv mmap size */ |
| 637 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, |
| 638 | sizeof(stream_data->size)); |
| 639 | if (len != sizeof(stream_data->size)) { |
| 640 | if (len < 0) |
| 641 | ret = len; |
| 642 | else |
| 643 | ret = -EINVAL; |
| 644 | goto error; |
| 645 | } |
| 646 | if (stream_data->size == -1) { |
| 647 | ret = -LTTNG_UST_ERR_NOENT; |
| 648 | goto error; |
| 649 | } |
| 650 | |
| 651 | /* recv stream nr */ |
| 652 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, |
| 653 | sizeof(stream_data->u.stream.stream_nr)); |
| 654 | if (len != sizeof(stream_data->u.stream.stream_nr)) { |
| 655 | if (len < 0) |
| 656 | ret = len; |
| 657 | else |
| 658 | ret = -EINVAL; |
| 659 | goto error; |
| 660 | } |
| 661 | |
| 662 | /* recv shm fd and wakeup fd */ |
| 663 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
| 664 | if (len <= 0) { |
| 665 | if (len < 0) { |
| 666 | ret = len; |
| 667 | goto error; |
| 668 | } else { |
| 669 | ret = -EIO; |
| 670 | goto error; |
| 671 | } |
| 672 | } |
| 673 | stream_data->u.stream.shm_fd = fds[0]; |
| 674 | stream_data->u.stream.wakeup_fd = fds[1]; |
| 675 | *_stream_data = stream_data; |
| 676 | return 0; |
| 677 | |
| 678 | error: |
| 679 | free(stream_data); |
| 680 | error_alloc: |
| 681 | return ret; |
| 682 | } |
| 683 | |
| 684 | int ustctl_send_channel_to_ust(int sock, int session_handle, |
| 685 | struct lttng_ust_object_data *channel_data) |
| 686 | { |
| 687 | struct ustcomm_ust_msg lum; |
| 688 | struct ustcomm_ust_reply lur; |
| 689 | int ret; |
| 690 | |
| 691 | if (!channel_data) |
| 692 | return -EINVAL; |
| 693 | |
| 694 | memset(&lum, 0, sizeof(lum)); |
| 695 | lum.handle = session_handle; |
| 696 | lum.cmd = LTTNG_UST_CHANNEL; |
| 697 | lum.u.channel.len = channel_data->size; |
| 698 | lum.u.channel.type = channel_data->u.channel.type; |
| 699 | ret = ustcomm_send_app_msg(sock, &lum); |
| 700 | if (ret) |
| 701 | return ret; |
| 702 | |
| 703 | ret = ustctl_send_channel(sock, |
| 704 | channel_data->u.channel.type, |
| 705 | channel_data->u.channel.data, |
| 706 | channel_data->size, |
| 707 | 1); |
| 708 | if (ret) |
| 709 | return ret; |
| 710 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 711 | if (!ret) { |
| 712 | if (lur.ret_val >= 0) { |
| 713 | channel_data->handle = lur.ret_val; |
| 714 | } |
| 715 | } |
| 716 | return ret; |
| 717 | } |
| 718 | |
| 719 | int ustctl_send_stream_to_ust(int sock, |
| 720 | struct lttng_ust_object_data *channel_data, |
| 721 | struct lttng_ust_object_data *stream_data) |
| 722 | { |
| 723 | struct ustcomm_ust_msg lum; |
| 724 | struct ustcomm_ust_reply lur; |
| 725 | int ret; |
| 726 | |
| 727 | memset(&lum, 0, sizeof(lum)); |
| 728 | lum.handle = channel_data->handle; |
| 729 | lum.cmd = LTTNG_UST_STREAM; |
| 730 | lum.u.stream.len = stream_data->size; |
| 731 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; |
| 732 | ret = ustcomm_send_app_msg(sock, &lum); |
| 733 | if (ret) |
| 734 | return ret; |
| 735 | |
| 736 | assert(stream_data); |
| 737 | assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM); |
| 738 | |
| 739 | ret = ustctl_send_stream(sock, |
| 740 | stream_data->u.stream.stream_nr, |
| 741 | stream_data->size, |
| 742 | stream_data->u.stream.shm_fd, |
| 743 | stream_data->u.stream.wakeup_fd, 1); |
| 744 | if (ret) |
| 745 | return ret; |
| 746 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 747 | } |
| 748 | |
| 749 | |
| 750 | /* Buffer operations */ |
| 751 | |
| 752 | struct ustctl_consumer_channel * |
| 753 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr) |
| 754 | { |
| 755 | struct ustctl_consumer_channel *chan; |
| 756 | const char *transport_name; |
| 757 | struct lttng_transport *transport; |
| 758 | |
| 759 | switch (attr->type) { |
| 760 | case LTTNG_UST_CHAN_PER_CPU: |
| 761 | if (attr->output == LTTNG_UST_MMAP) { |
| 762 | transport_name = attr->overwrite ? |
| 763 | "relay-overwrite-mmap" : "relay-discard-mmap"; |
| 764 | } else { |
| 765 | return NULL; |
| 766 | } |
| 767 | break; |
| 768 | case LTTNG_UST_CHAN_METADATA: |
| 769 | if (attr->output == LTTNG_UST_MMAP) |
| 770 | transport_name = "relay-metadata-mmap"; |
| 771 | else |
| 772 | return NULL; |
| 773 | break; |
| 774 | default: |
| 775 | transport_name = "<unknown>"; |
| 776 | return NULL; |
| 777 | } |
| 778 | |
| 779 | transport = lttng_transport_find(transport_name); |
| 780 | if (!transport) { |
| 781 | DBG("LTTng transport %s not found\n", |
| 782 | transport_name); |
| 783 | return NULL; |
| 784 | } |
| 785 | |
| 786 | chan = zmalloc(sizeof(*chan)); |
| 787 | if (!chan) |
| 788 | return NULL; |
| 789 | |
| 790 | chan->chan = transport->ops.channel_create(transport_name, NULL, |
| 791 | attr->subbuf_size, attr->num_subbuf, |
| 792 | attr->switch_timer_interval, |
| 793 | attr->read_timer_interval, |
| 794 | attr->uuid); |
| 795 | if (!chan->chan) { |
| 796 | goto chan_error; |
| 797 | } |
| 798 | chan->chan->ops = &transport->ops; |
| 799 | memcpy(&chan->attr, attr, sizeof(chan->attr)); |
| 800 | return chan; |
| 801 | |
| 802 | chan_error: |
| 803 | free(chan); |
| 804 | return NULL; |
| 805 | } |
| 806 | |
| 807 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan) |
| 808 | { |
| 809 | chan->chan->ops->channel_destroy(chan->chan); |
| 810 | free(chan); |
| 811 | } |
| 812 | |
| 813 | int ustctl_send_channel_to_sessiond(int sock, |
| 814 | struct ustctl_consumer_channel *channel) |
| 815 | { |
| 816 | struct shm_object_table *table; |
| 817 | |
| 818 | table = channel->chan->handle->table; |
| 819 | if (table->size <= 0) |
| 820 | return -EINVAL; |
| 821 | return ustctl_send_channel(sock, |
| 822 | channel->attr.type, |
| 823 | table->objects[0].memory_map, |
| 824 | table->objects[0].memory_map_size, |
| 825 | 0); |
| 826 | } |
| 827 | |
| 828 | int ustctl_send_stream_to_sessiond(int sock, |
| 829 | struct ustctl_consumer_stream *stream) |
| 830 | { |
| 831 | if (!stream) |
| 832 | return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0); |
| 833 | |
| 834 | return ustctl_send_stream(sock, |
| 835 | stream->cpu, |
| 836 | stream->memory_map_size, |
| 837 | stream->shm_fd, stream->wakeup_fd, |
| 838 | 0); |
| 839 | } |
| 840 | |
| 841 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream) |
| 842 | { |
| 843 | struct channel *chan; |
| 844 | |
| 845 | chan = stream->chan->chan->chan; |
| 846 | return ring_buffer_close_wait_fd(&chan->backend.config, |
| 847 | chan, stream->handle, stream->cpu); |
| 848 | } |
| 849 | |
| 850 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream) |
| 851 | { |
| 852 | struct channel *chan; |
| 853 | |
| 854 | chan = stream->chan->chan->chan; |
| 855 | return ring_buffer_close_wakeup_fd(&chan->backend.config, |
| 856 | chan, stream->handle, stream->cpu); |
| 857 | } |
| 858 | |
| 859 | struct ustctl_consumer_stream * |
| 860 | ustctl_create_stream(struct ustctl_consumer_channel *channel, |
| 861 | int cpu) |
| 862 | { |
| 863 | struct ustctl_consumer_stream *stream; |
| 864 | struct lttng_ust_shm_handle *handle; |
| 865 | struct channel *chan; |
| 866 | int shm_fd, wait_fd, wakeup_fd; |
| 867 | uint64_t memory_map_size; |
| 868 | struct lttng_ust_lib_ring_buffer *buf; |
| 869 | int ret; |
| 870 | |
| 871 | if (!channel) |
| 872 | return NULL; |
| 873 | handle = channel->chan->handle; |
| 874 | if (!handle) |
| 875 | return NULL; |
| 876 | |
| 877 | chan = channel->chan->chan; |
| 878 | buf = channel_get_ring_buffer(&chan->backend.config, |
| 879 | chan, cpu, handle, &shm_fd, &wait_fd, |
| 880 | &wakeup_fd, &memory_map_size); |
| 881 | if (!buf) |
| 882 | return NULL; |
| 883 | ret = lib_ring_buffer_open_read(buf, handle); |
| 884 | if (ret) |
| 885 | return NULL; |
| 886 | |
| 887 | stream = zmalloc(sizeof(*stream)); |
| 888 | if (!stream) |
| 889 | goto alloc_error; |
| 890 | stream->handle = handle; |
| 891 | stream->buf = buf; |
| 892 | stream->chan = channel; |
| 893 | stream->shm_fd = shm_fd; |
| 894 | stream->wait_fd = wait_fd; |
| 895 | stream->wakeup_fd = wakeup_fd; |
| 896 | stream->memory_map_size = memory_map_size; |
| 897 | stream->cpu = cpu; |
| 898 | return stream; |
| 899 | |
| 900 | alloc_error: |
| 901 | return NULL; |
| 902 | } |
| 903 | |
| 904 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream) |
| 905 | { |
| 906 | struct lttng_ust_lib_ring_buffer *buf; |
| 907 | struct ustctl_consumer_channel *consumer_chan; |
| 908 | |
| 909 | assert(stream); |
| 910 | buf = stream->buf; |
| 911 | consumer_chan = stream->chan; |
| 912 | lib_ring_buffer_release_read(buf, consumer_chan->chan->handle); |
| 913 | free(stream); |
| 914 | } |
| 915 | |
| 916 | int ustctl_get_wait_fd(struct ustctl_consumer_stream *stream) |
| 917 | { |
| 918 | struct lttng_ust_lib_ring_buffer *buf; |
| 919 | struct ustctl_consumer_channel *consumer_chan; |
| 920 | |
| 921 | if (!stream) |
| 922 | return -EINVAL; |
| 923 | buf = stream->buf; |
| 924 | consumer_chan = stream->chan; |
| 925 | return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref); |
| 926 | } |
| 927 | |
| 928 | int ustctl_get_wakeup_fd(struct ustctl_consumer_stream *stream) |
| 929 | { |
| 930 | struct lttng_ust_lib_ring_buffer *buf; |
| 931 | struct ustctl_consumer_channel *consumer_chan; |
| 932 | |
| 933 | if (!stream) |
| 934 | return -EINVAL; |
| 935 | buf = stream->buf; |
| 936 | consumer_chan = stream->chan; |
| 937 | return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref); |
| 938 | } |
| 939 | |
| 940 | /* For mmap mode, readable without "get" operation */ |
| 941 | |
| 942 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream) |
| 943 | { |
| 944 | struct lttng_ust_lib_ring_buffer *buf; |
| 945 | struct ustctl_consumer_channel *consumer_chan; |
| 946 | |
| 947 | if (!stream) |
| 948 | return NULL; |
| 949 | buf = stream->buf; |
| 950 | consumer_chan = stream->chan; |
| 951 | return shmp(consumer_chan->chan->handle, buf->backend.memory_map); |
| 952 | } |
| 953 | |
| 954 | /* returns the length to mmap. */ |
| 955 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
| 956 | unsigned long *len) |
| 957 | { |
| 958 | struct ustctl_consumer_channel *consumer_chan; |
| 959 | unsigned long mmap_buf_len; |
| 960 | struct channel *chan; |
| 961 | |
| 962 | if (!stream) |
| 963 | return -EINVAL; |
| 964 | consumer_chan = stream->chan; |
| 965 | chan = consumer_chan->chan->chan; |
| 966 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
| 967 | return -EINVAL; |
| 968 | mmap_buf_len = chan->backend.buf_size; |
| 969 | if (chan->backend.extra_reader_sb) |
| 970 | mmap_buf_len += chan->backend.subbuf_size; |
| 971 | if (mmap_buf_len > INT_MAX) |
| 972 | return -EFBIG; |
| 973 | *len = mmap_buf_len; |
| 974 | return 0; |
| 975 | } |
| 976 | |
| 977 | /* returns the maximum size for sub-buffers. */ |
| 978 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
| 979 | unsigned long *len) |
| 980 | { |
| 981 | struct ustctl_consumer_channel *consumer_chan; |
| 982 | struct channel *chan; |
| 983 | |
| 984 | if (!stream) |
| 985 | return -EINVAL; |
| 986 | consumer_chan = stream->chan; |
| 987 | chan = consumer_chan->chan->chan; |
| 988 | *len = chan->backend.subbuf_size; |
| 989 | return 0; |
| 990 | } |
| 991 | |
| 992 | /* |
| 993 | * For mmap mode, operate on the current packet (between get/put or |
| 994 | * get_next/put_next). |
| 995 | */ |
| 996 | |
| 997 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
| 998 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, |
| 999 | unsigned long *off) |
| 1000 | { |
| 1001 | struct channel *chan; |
| 1002 | unsigned long sb_bindex; |
| 1003 | struct lttng_ust_lib_ring_buffer *buf; |
| 1004 | struct ustctl_consumer_channel *consumer_chan; |
| 1005 | |
| 1006 | if (!stream) |
| 1007 | return -EINVAL; |
| 1008 | buf = stream->buf; |
| 1009 | consumer_chan = stream->chan; |
| 1010 | chan = consumer_chan->chan->chan; |
| 1011 | if (chan->backend.config.output != RING_BUFFER_MMAP) |
| 1012 | return -EINVAL; |
| 1013 | sb_bindex = subbuffer_id_get_index(&chan->backend.config, |
| 1014 | buf->backend.buf_rsb.id); |
| 1015 | *off = shmp(consumer_chan->chan->handle, |
| 1016 | shmp_index(consumer_chan->chan->handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset; |
| 1017 | return 0; |
| 1018 | } |
| 1019 | |
| 1020 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
| 1021 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, |
| 1022 | unsigned long *len) |
| 1023 | { |
| 1024 | struct ustctl_consumer_channel *consumer_chan; |
| 1025 | struct channel *chan; |
| 1026 | struct lttng_ust_lib_ring_buffer *buf; |
| 1027 | |
| 1028 | if (!stream) |
| 1029 | return -EINVAL; |
| 1030 | |
| 1031 | buf = stream->buf; |
| 1032 | consumer_chan = stream->chan; |
| 1033 | chan = consumer_chan->chan->chan; |
| 1034 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
| 1035 | consumer_chan->chan->handle); |
| 1036 | return 0; |
| 1037 | } |
| 1038 | |
| 1039 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
| 1040 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, |
| 1041 | unsigned long *len) |
| 1042 | { |
| 1043 | struct ustctl_consumer_channel *consumer_chan; |
| 1044 | struct channel *chan; |
| 1045 | struct lttng_ust_lib_ring_buffer *buf; |
| 1046 | |
| 1047 | if (!stream) |
| 1048 | return -EINVAL; |
| 1049 | buf = stream->buf; |
| 1050 | consumer_chan = stream->chan; |
| 1051 | chan = consumer_chan->chan->chan; |
| 1052 | *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf, |
| 1053 | consumer_chan->chan->handle); |
| 1054 | *len = PAGE_ALIGN(*len); |
| 1055 | return 0; |
| 1056 | } |
| 1057 | |
| 1058 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
| 1059 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream) |
| 1060 | { |
| 1061 | struct lttng_ust_lib_ring_buffer *buf; |
| 1062 | struct ustctl_consumer_channel *consumer_chan; |
| 1063 | |
| 1064 | if (!stream) |
| 1065 | return -EINVAL; |
| 1066 | buf = stream->buf; |
| 1067 | consumer_chan = stream->chan; |
| 1068 | return lib_ring_buffer_get_next_subbuf(buf, |
| 1069 | consumer_chan->chan->handle); |
| 1070 | } |
| 1071 | |
| 1072 | |
| 1073 | /* Release exclusive sub-buffer access, move consumer forward. */ |
| 1074 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream) |
| 1075 | { |
| 1076 | struct lttng_ust_lib_ring_buffer *buf; |
| 1077 | struct ustctl_consumer_channel *consumer_chan; |
| 1078 | |
| 1079 | if (!stream) |
| 1080 | return -EINVAL; |
| 1081 | buf = stream->buf; |
| 1082 | consumer_chan = stream->chan; |
| 1083 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle); |
| 1084 | return 0; |
| 1085 | } |
| 1086 | |
| 1087 | /* snapshot */ |
| 1088 | |
| 1089 | /* Get a snapshot of the current ring buffer producer and consumer positions */ |
| 1090 | int ustctl_snapshot(struct ustctl_consumer_stream *stream) |
| 1091 | { |
| 1092 | struct lttng_ust_lib_ring_buffer *buf; |
| 1093 | struct ustctl_consumer_channel *consumer_chan; |
| 1094 | |
| 1095 | if (!stream) |
| 1096 | return -EINVAL; |
| 1097 | buf = stream->buf; |
| 1098 | consumer_chan = stream->chan; |
| 1099 | return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
| 1100 | &buf->prod_snapshot, consumer_chan->chan->handle); |
| 1101 | } |
| 1102 | |
| 1103 | /* Get the consumer position (iteration start) */ |
| 1104 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
| 1105 | unsigned long *pos) |
| 1106 | { |
| 1107 | struct lttng_ust_lib_ring_buffer *buf; |
| 1108 | |
| 1109 | if (!stream) |
| 1110 | return -EINVAL; |
| 1111 | buf = stream->buf; |
| 1112 | *pos = buf->cons_snapshot; |
| 1113 | return 0; |
| 1114 | } |
| 1115 | |
| 1116 | /* Get the producer position (iteration end) */ |
| 1117 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, |
| 1118 | unsigned long *pos) |
| 1119 | { |
| 1120 | struct lttng_ust_lib_ring_buffer *buf; |
| 1121 | |
| 1122 | if (!stream) |
| 1123 | return -EINVAL; |
| 1124 | buf = stream->buf; |
| 1125 | *pos = buf->prod_snapshot; |
| 1126 | return 0; |
| 1127 | } |
| 1128 | |
| 1129 | /* Get exclusive read access to the specified sub-buffer position */ |
| 1130 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, |
| 1131 | unsigned long *pos) |
| 1132 | { |
| 1133 | struct lttng_ust_lib_ring_buffer *buf; |
| 1134 | struct ustctl_consumer_channel *consumer_chan; |
| 1135 | |
| 1136 | if (!stream) |
| 1137 | return -EINVAL; |
| 1138 | buf = stream->buf; |
| 1139 | consumer_chan = stream->chan; |
| 1140 | return lib_ring_buffer_get_subbuf(buf, *pos, |
| 1141 | consumer_chan->chan->handle); |
| 1142 | } |
| 1143 | |
| 1144 | /* Release exclusive sub-buffer access */ |
| 1145 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream) |
| 1146 | { |
| 1147 | struct lttng_ust_lib_ring_buffer *buf; |
| 1148 | struct ustctl_consumer_channel *consumer_chan; |
| 1149 | |
| 1150 | if (!stream) |
| 1151 | return -EINVAL; |
| 1152 | buf = stream->buf; |
| 1153 | consumer_chan = stream->chan; |
| 1154 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle); |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
| 1159 | int producer_active) |
| 1160 | { |
| 1161 | struct lttng_ust_lib_ring_buffer *buf; |
| 1162 | struct ustctl_consumer_channel *consumer_chan; |
| 1163 | |
| 1164 | assert(stream); |
| 1165 | buf = stream->buf; |
| 1166 | consumer_chan = stream->chan; |
| 1167 | lib_ring_buffer_switch_slow(buf, |
| 1168 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, |
| 1169 | consumer_chan->chan->handle); |
| 1170 | } |
| 1171 | |
| 1172 | static __attribute__((constructor)) |
| 1173 | void ustctl_init(void) |
| 1174 | { |
| 1175 | init_usterr(); |
| 1176 | lttng_ring_buffer_metadata_client_init(); |
| 1177 | lttng_ring_buffer_client_overwrite_init(); |
| 1178 | lttng_ring_buffer_client_discard_init(); |
| 1179 | } |
| 1180 | |
| 1181 | static __attribute__((destructor)) |
| 1182 | void ustctl_exit(void) |
| 1183 | { |
| 1184 | lttng_ring_buffer_client_discard_exit(); |
| 1185 | lttng_ring_buffer_client_overwrite_exit(); |
| 1186 | lttng_ring_buffer_metadata_client_exit(); |
| 1187 | } |