| 1 | /* |
| 2 | * SPDX-License-Identifier: GPL-2.0-only |
| 3 | * |
| 4 | * Copyright (C) 2011 EfficiOS Inc. |
| 5 | * Copyright (C) 2011-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #include <stdint.h> |
| 9 | #include <string.h> |
| 10 | #include <sys/mman.h> |
| 11 | #include <unistd.h> |
| 12 | #include <sys/types.h> |
| 13 | #include <sys/socket.h> |
| 14 | |
| 15 | #include <lttng/ust-config.h> |
| 16 | #include <lttng/ust-ctl.h> |
| 17 | #include <lttng/ust-abi.h> |
| 18 | #include <lttng/ust-endian.h> |
| 19 | #include <lttng/ust-common.h> |
| 20 | #include <lttng/ust-sigbus.h> |
| 21 | #include <urcu/rculist.h> |
| 22 | |
| 23 | #include "common/logging.h" |
| 24 | #include "common/ustcomm.h" |
| 25 | #include "common/macros.h" |
| 26 | #include "common/align.h" |
| 27 | |
| 28 | #include "common/ringbuffer/backend.h" |
| 29 | #include "common/ringbuffer/frontend.h" |
| 30 | #include "common/events.h" |
| 31 | #include "common/wait.h" |
| 32 | #include "common/ringbuffer-clients/clients.h" |
| 33 | #include "common/getenv.h" |
| 34 | #include "common/tracer.h" |
| 35 | #include "common/counter-clients/clients.h" |
| 36 | |
| 37 | #include "common/smp.h" |
| 38 | #include "common/counter/counter.h" |
| 39 | |
| 40 | /* |
| 41 | * Number of milliseconds to retry before failing metadata writes on |
| 42 | * buffer full condition. (10 seconds) |
| 43 | */ |
| 44 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 |
| 45 | |
| 46 | /* |
| 47 | * Channel representation within consumer. |
| 48 | */ |
| 49 | struct lttng_ust_ctl_consumer_channel { |
| 50 | struct lttng_ust_channel_buffer *chan; /* lttng channel buffers */ |
| 51 | |
| 52 | /* initial attributes */ |
| 53 | struct lttng_ust_ctl_consumer_channel_attr attr; |
| 54 | int wait_fd; /* monitor close() */ |
| 55 | int wakeup_fd; /* monitor close() */ |
| 56 | }; |
| 57 | |
| 58 | /* |
| 59 | * Stream representation within consumer. |
| 60 | */ |
| 61 | struct lttng_ust_ctl_consumer_stream { |
| 62 | struct lttng_ust_ring_buffer *buf; |
| 63 | struct lttng_ust_ctl_consumer_channel *chan; |
| 64 | int shm_fd, wait_fd, wakeup_fd; |
| 65 | int cpu; |
| 66 | uint64_t memory_map_size; |
| 67 | void *memory_map_addr; |
| 68 | }; |
| 69 | |
| 70 | #define LTTNG_UST_CTL_COUNTER_ATTR_DIMENSION_MAX 8 |
| 71 | struct lttng_ust_ctl_counter_attr { |
| 72 | enum lttng_ust_ctl_counter_arithmetic arithmetic; |
| 73 | enum lttng_ust_ctl_counter_bitness bitness; |
| 74 | uint32_t nr_dimensions; |
| 75 | int64_t global_sum_step; |
| 76 | struct lttng_ust_ctl_counter_dimension dimensions[LTTNG_UST_CTL_COUNTER_ATTR_DIMENSION_MAX]; |
| 77 | bool coalesce_hits; |
| 78 | }; |
| 79 | |
| 80 | /* |
| 81 | * Counter representation within daemon. |
| 82 | */ |
| 83 | struct lttng_ust_ctl_daemon_counter { |
| 84 | struct lttng_ust_channel_counter *counter; |
| 85 | const struct lttng_ust_channel_counter_ops *ops; |
| 86 | struct lttng_ust_ctl_counter_attr *attr; /* initial attributes */ |
| 87 | }; |
| 88 | |
| 89 | /* |
| 90 | * Evaluates to false if transaction begins, true if it has failed due to SIGBUS. |
| 91 | * The entire transaction must complete before the current function returns. |
| 92 | * A transaction can contain 0 or more tracked ranges as sigbus begin/end pairs. |
| 93 | */ |
| 94 | #define sigbus_begin() \ |
| 95 | ({ \ |
| 96 | assert(!lttng_ust_sigbus_state.jmp_ready); \ |
| 97 | if (!lttng_ust_sigbus_state.head.next) { \ |
| 98 | /* \ |
| 99 | * Lazy init because static list initialisation is \ |
| 100 | * problematic for TLS variable. \ |
| 101 | */ \ |
| 102 | CDS_INIT_LIST_HEAD(<tng_ust_sigbus_state.head); \ |
| 103 | } \ |
| 104 | if (sigsetjmp(lttng_ust_sigbus_state.sj_env, 1)) { \ |
| 105 | /* SIGBUS. */ \ |
| 106 | CMM_STORE_SHARED(lttng_ust_sigbus_state.jmp_ready, 0); \ |
| 107 | true; \ |
| 108 | } \ |
| 109 | cmm_barrier(); \ |
| 110 | CMM_STORE_SHARED(lttng_ust_sigbus_state.jmp_ready, 1); \ |
| 111 | false; \ |
| 112 | }) |
| 113 | |
| 114 | static void sigbus_end(void) |
| 115 | { |
| 116 | assert(lttng_ust_sigbus_state.jmp_ready); |
| 117 | cmm_barrier(); |
| 118 | CMM_STORE_SHARED(lttng_ust_sigbus_state.jmp_ready, 0); |
| 119 | } |
| 120 | |
| 121 | static |
| 122 | void lttng_ust_sigbus_add_range(struct lttng_ust_sigbus_range *range, void *start, size_t len) |
| 123 | { |
| 124 | range->start = start; |
| 125 | range->end = (char *)start + len; |
| 126 | cds_list_add_rcu(&range->node, <tng_ust_sigbus_state.head); |
| 127 | cmm_barrier(); |
| 128 | } |
| 129 | |
| 130 | static |
| 131 | void lttng_ust_sigbus_del_range(struct lttng_ust_sigbus_range *range) |
| 132 | { |
| 133 | cmm_barrier(); |
| 134 | cds_list_del_rcu(&range->node); |
| 135 | } |
| 136 | |
| 137 | void lttng_ust_ctl_sigbus_handle(void *addr) |
| 138 | { |
| 139 | struct lttng_ust_sigbus_range *range; |
| 140 | |
| 141 | if (!CMM_LOAD_SHARED(lttng_ust_sigbus_state.jmp_ready)) |
| 142 | return; |
| 143 | cds_list_for_each_entry_rcu(range, <tng_ust_sigbus_state.head, node) { |
| 144 | if (addr < range->start || addr >= range->end) |
| 145 | continue; |
| 146 | siglongjmp(lttng_ust_sigbus_state.sj_env, 1); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | int lttng_ust_ctl_release_handle(int sock, int handle) |
| 151 | { |
| 152 | struct ustcomm_ust_msg lum; |
| 153 | struct ustcomm_ust_reply lur; |
| 154 | |
| 155 | if (sock < 0 || handle < 0) |
| 156 | return 0; |
| 157 | memset(&lum, 0, sizeof(lum)); |
| 158 | lum.handle = handle; |
| 159 | lum.cmd = LTTNG_UST_ABI_RELEASE; |
| 160 | return ustcomm_send_app_cmd(sock, &lum, &lur); |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * If sock is negative, it means we don't have to notify the other side |
| 165 | * (e.g. application has already vanished). |
| 166 | */ |
| 167 | int lttng_ust_ctl_release_object(int sock, struct lttng_ust_abi_object_data *data) |
| 168 | { |
| 169 | int ret; |
| 170 | |
| 171 | if (!data) |
| 172 | return -EINVAL; |
| 173 | |
| 174 | switch (data->type) { |
| 175 | case LTTNG_UST_ABI_OBJECT_TYPE_CHANNEL: |
| 176 | if (data->u.channel.wakeup_fd >= 0) { |
| 177 | ret = close(data->u.channel.wakeup_fd); |
| 178 | if (ret < 0) { |
| 179 | ret = -errno; |
| 180 | return ret; |
| 181 | } |
| 182 | data->u.channel.wakeup_fd = -1; |
| 183 | } |
| 184 | free(data->u.channel.data); |
| 185 | data->u.channel.data = NULL; |
| 186 | break; |
| 187 | case LTTNG_UST_ABI_OBJECT_TYPE_STREAM: |
| 188 | if (data->u.stream.shm_fd >= 0) { |
| 189 | ret = close(data->u.stream.shm_fd); |
| 190 | if (ret < 0) { |
| 191 | ret = -errno; |
| 192 | return ret; |
| 193 | } |
| 194 | data->u.stream.shm_fd = -1; |
| 195 | } |
| 196 | if (data->u.stream.wakeup_fd >= 0) { |
| 197 | ret = close(data->u.stream.wakeup_fd); |
| 198 | if (ret < 0) { |
| 199 | ret = -errno; |
| 200 | return ret; |
| 201 | } |
| 202 | data->u.stream.wakeup_fd = -1; |
| 203 | } |
| 204 | break; |
| 205 | case LTTNG_UST_ABI_OBJECT_TYPE_EVENT: |
| 206 | case LTTNG_UST_ABI_OBJECT_TYPE_CONTEXT: |
| 207 | case LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER_GROUP: |
| 208 | case LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER: |
| 209 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_EVENT: |
| 210 | break; |
| 211 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER: |
| 212 | free(data->u.counter.data); |
| 213 | data->u.counter.data = NULL; |
| 214 | break; |
| 215 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_GLOBAL: |
| 216 | if (data->u.counter_global.shm_fd >= 0) { |
| 217 | ret = close(data->u.counter_global.shm_fd); |
| 218 | if (ret < 0) { |
| 219 | ret = -errno; |
| 220 | return ret; |
| 221 | } |
| 222 | data->u.counter_global.shm_fd = -1; |
| 223 | } |
| 224 | break; |
| 225 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_CPU: |
| 226 | if (data->u.counter_cpu.shm_fd >= 0) { |
| 227 | ret = close(data->u.counter_cpu.shm_fd); |
| 228 | if (ret < 0) { |
| 229 | ret = -errno; |
| 230 | return ret; |
| 231 | } |
| 232 | data->u.counter_cpu.shm_fd = -1; |
| 233 | } |
| 234 | break; |
| 235 | default: |
| 236 | assert(0); |
| 237 | } |
| 238 | return lttng_ust_ctl_release_handle(sock, data->handle); |
| 239 | } |
| 240 | |
| 241 | /* |
| 242 | * Send registration done packet to the application. |
| 243 | */ |
| 244 | int lttng_ust_ctl_register_done(int sock) |
| 245 | { |
| 246 | struct ustcomm_ust_msg lum; |
| 247 | struct ustcomm_ust_reply lur; |
| 248 | int ret; |
| 249 | |
| 250 | DBG("Sending register done command to %d", sock); |
| 251 | memset(&lum, 0, sizeof(lum)); |
| 252 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
| 253 | lum.cmd = LTTNG_UST_ABI_REGISTER_DONE; |
| 254 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 255 | if (ret) |
| 256 | return ret; |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | /* |
| 261 | * returns session handle. |
| 262 | */ |
| 263 | int lttng_ust_ctl_create_session(int sock) |
| 264 | { |
| 265 | struct ustcomm_ust_msg lum; |
| 266 | struct ustcomm_ust_reply lur; |
| 267 | int ret, session_handle; |
| 268 | |
| 269 | /* Create session */ |
| 270 | memset(&lum, 0, sizeof(lum)); |
| 271 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
| 272 | lum.cmd = LTTNG_UST_ABI_SESSION; |
| 273 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 274 | if (ret) |
| 275 | return ret; |
| 276 | session_handle = lur.ret_val; |
| 277 | DBG("received session handle %u", session_handle); |
| 278 | return session_handle; |
| 279 | } |
| 280 | |
| 281 | int lttng_ust_ctl_create_event(int sock, struct lttng_ust_abi_event *ev, |
| 282 | struct lttng_ust_abi_object_data *channel_data, |
| 283 | struct lttng_ust_abi_object_data **_event_data) |
| 284 | { |
| 285 | struct ustcomm_ust_msg lum; |
| 286 | struct ustcomm_ust_reply lur; |
| 287 | struct lttng_ust_abi_object_data *event_data; |
| 288 | int ret; |
| 289 | |
| 290 | if (!channel_data || !_event_data) |
| 291 | return -EINVAL; |
| 292 | |
| 293 | event_data = zmalloc(sizeof(*event_data)); |
| 294 | if (!event_data) |
| 295 | return -ENOMEM; |
| 296 | event_data->type = LTTNG_UST_ABI_OBJECT_TYPE_EVENT; |
| 297 | memset(&lum, 0, sizeof(lum)); |
| 298 | lum.handle = channel_data->handle; |
| 299 | lum.cmd = LTTNG_UST_ABI_EVENT; |
| 300 | strncpy(lum.u.event.name, ev->name, |
| 301 | LTTNG_UST_ABI_SYM_NAME_LEN); |
| 302 | lum.u.event.instrumentation = ev->instrumentation; |
| 303 | lum.u.event.loglevel_type = ev->loglevel_type; |
| 304 | lum.u.event.loglevel = ev->loglevel; |
| 305 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 306 | if (ret) { |
| 307 | free(event_data); |
| 308 | return ret; |
| 309 | } |
| 310 | event_data->handle = lur.ret_val; |
| 311 | DBG("received event handle %u", event_data->handle); |
| 312 | *_event_data = event_data; |
| 313 | return 0; |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Protocol for LTTNG_UST_ABI_CONTEXT command: |
| 318 | * |
| 319 | * - send: struct ustcomm_ust_msg |
| 320 | * - send: var len ctx_name |
| 321 | * - receive: struct ustcomm_ust_reply |
| 322 | * |
| 323 | * TODO: At the next breaking protocol bump, we should indicate the total |
| 324 | * command message length as part of a message header so that the protocol can |
| 325 | * recover from invalid command errors. |
| 326 | */ |
| 327 | int lttng_ust_ctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
| 328 | struct lttng_ust_abi_object_data *obj_data, |
| 329 | struct lttng_ust_abi_object_data **_context_data) |
| 330 | { |
| 331 | struct ustcomm_ust_msg lum; |
| 332 | struct ustcomm_ust_reply lur; |
| 333 | struct lttng_ust_abi_object_data *context_data = NULL; |
| 334 | char *buf = NULL; |
| 335 | size_t len; |
| 336 | int ret; |
| 337 | |
| 338 | if (!obj_data || !_context_data) { |
| 339 | ret = -EINVAL; |
| 340 | goto end; |
| 341 | } |
| 342 | |
| 343 | context_data = zmalloc(sizeof(*context_data)); |
| 344 | if (!context_data) { |
| 345 | ret = -ENOMEM; |
| 346 | goto end; |
| 347 | } |
| 348 | context_data->type = LTTNG_UST_ABI_OBJECT_TYPE_CONTEXT; |
| 349 | memset(&lum, 0, sizeof(lum)); |
| 350 | lum.handle = obj_data->handle; |
| 351 | lum.cmd = LTTNG_UST_ABI_CONTEXT; |
| 352 | |
| 353 | lum.u.context.ctx = ctx->ctx; |
| 354 | switch (ctx->ctx) { |
| 355 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
| 356 | lum.u.context.u.perf_counter = ctx->u.perf_counter; |
| 357 | break; |
| 358 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
| 359 | { |
| 360 | size_t provider_name_len = strlen( |
| 361 | ctx->u.app_ctx.provider_name) + 1; |
| 362 | size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1; |
| 363 | |
| 364 | lum.u.context.u.app_ctx.provider_name_len = provider_name_len; |
| 365 | lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len; |
| 366 | |
| 367 | len = provider_name_len + ctx_name_len; |
| 368 | buf = zmalloc(len); |
| 369 | if (!buf) { |
| 370 | ret = -ENOMEM; |
| 371 | goto end; |
| 372 | } |
| 373 | memcpy(buf, ctx->u.app_ctx.provider_name, |
| 374 | provider_name_len); |
| 375 | memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name, |
| 376 | ctx_name_len); |
| 377 | break; |
| 378 | } |
| 379 | default: |
| 380 | break; |
| 381 | } |
| 382 | ret = ustcomm_send_app_msg(sock, &lum); |
| 383 | if (ret) |
| 384 | goto end; |
| 385 | if (buf) { |
| 386 | /* send var len ctx_name */ |
| 387 | ret = ustcomm_send_unix_sock(sock, buf, len); |
| 388 | if (ret < 0) { |
| 389 | goto end; |
| 390 | } |
| 391 | if (ret != len) { |
| 392 | ret = -EINVAL; |
| 393 | goto end; |
| 394 | } |
| 395 | } |
| 396 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 397 | if (ret < 0) { |
| 398 | if (ret == -EINVAL) { |
| 399 | /* |
| 400 | * Command unknown from remote end. The communication socket is |
| 401 | * now out-of-sync and needs to be shutdown. |
| 402 | */ |
| 403 | (void) ustcomm_shutdown_unix_sock(sock); |
| 404 | } |
| 405 | goto end; |
| 406 | } |
| 407 | context_data->handle = -1; |
| 408 | DBG("Context created successfully"); |
| 409 | *_context_data = context_data; |
| 410 | context_data = NULL; |
| 411 | end: |
| 412 | free(context_data); |
| 413 | free(buf); |
| 414 | return ret; |
| 415 | } |
| 416 | |
| 417 | /* |
| 418 | * Protocol for LTTNG_UST_ABI_FILTER command: |
| 419 | * |
| 420 | * - send: struct ustcomm_ust_msg |
| 421 | * - send: var len bytecode |
| 422 | * - receive: struct ustcomm_ust_reply |
| 423 | * |
| 424 | * TODO: At the next breaking protocol bump, we should indicate the total |
| 425 | * command message length as part of a message header so that the protocol can |
| 426 | * recover from invalid command errors. |
| 427 | */ |
| 428 | int lttng_ust_ctl_set_filter(int sock, struct lttng_ust_abi_filter_bytecode *bytecode, |
| 429 | struct lttng_ust_abi_object_data *obj_data) |
| 430 | { |
| 431 | struct ustcomm_ust_msg lum; |
| 432 | struct ustcomm_ust_reply lur; |
| 433 | int ret; |
| 434 | |
| 435 | if (!obj_data) |
| 436 | return -EINVAL; |
| 437 | |
| 438 | memset(&lum, 0, sizeof(lum)); |
| 439 | lum.handle = obj_data->handle; |
| 440 | lum.cmd = LTTNG_UST_ABI_FILTER; |
| 441 | lum.u.filter.data_size = bytecode->len; |
| 442 | lum.u.filter.reloc_offset = bytecode->reloc_offset; |
| 443 | lum.u.filter.seqnum = bytecode->seqnum; |
| 444 | |
| 445 | ret = ustcomm_send_app_msg(sock, &lum); |
| 446 | if (ret) |
| 447 | return ret; |
| 448 | /* send var len bytecode */ |
| 449 | ret = ustcomm_send_unix_sock(sock, bytecode->data, |
| 450 | bytecode->len); |
| 451 | if (ret < 0) { |
| 452 | return ret; |
| 453 | } |
| 454 | if (ret != bytecode->len) |
| 455 | return -EINVAL; |
| 456 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 457 | if (ret == -EINVAL) { |
| 458 | /* |
| 459 | * Command unknown from remote end. The communication socket is |
| 460 | * now out-of-sync and needs to be shutdown. |
| 461 | */ |
| 462 | (void) ustcomm_shutdown_unix_sock(sock); |
| 463 | } |
| 464 | return ret; |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * Protocol for LTTNG_UST_ABI_CAPTURE command: |
| 469 | * |
| 470 | * - send: struct ustcomm_ust_msg |
| 471 | * - receive: struct ustcomm_ust_reply |
| 472 | * - send: var len bytecode |
| 473 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 474 | */ |
| 475 | int lttng_ust_ctl_set_capture(int sock, struct lttng_ust_abi_capture_bytecode *bytecode, |
| 476 | struct lttng_ust_abi_object_data *obj_data) |
| 477 | { |
| 478 | struct ustcomm_ust_msg lum; |
| 479 | struct ustcomm_ust_reply lur; |
| 480 | int ret; |
| 481 | |
| 482 | if (!obj_data) |
| 483 | return -EINVAL; |
| 484 | |
| 485 | memset(&lum, 0, sizeof(lum)); |
| 486 | lum.handle = obj_data->handle; |
| 487 | lum.cmd = LTTNG_UST_ABI_CAPTURE; |
| 488 | lum.u.capture.data_size = bytecode->len; |
| 489 | lum.u.capture.reloc_offset = bytecode->reloc_offset; |
| 490 | lum.u.capture.seqnum = bytecode->seqnum; |
| 491 | |
| 492 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 493 | if (ret) |
| 494 | return ret; |
| 495 | /* send var len bytecode */ |
| 496 | ret = ustcomm_send_unix_sock(sock, bytecode->data, |
| 497 | bytecode->len); |
| 498 | if (ret < 0) { |
| 499 | return ret; |
| 500 | } |
| 501 | if (ret != bytecode->len) |
| 502 | return -EINVAL; |
| 503 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 504 | } |
| 505 | |
| 506 | /* |
| 507 | * Protocol for LTTNG_UST_ABI_EXCLUSION command: |
| 508 | * |
| 509 | * - send: struct ustcomm_ust_msg |
| 510 | * - send: var len exclusion names |
| 511 | * - receive: struct ustcomm_ust_reply |
| 512 | * |
| 513 | * TODO: At the next breaking protocol bump, we should indicate the total |
| 514 | * command message length as part of a message header so that the protocol can |
| 515 | * recover from invalid command errors. |
| 516 | */ |
| 517 | int lttng_ust_ctl_set_exclusion(int sock, struct lttng_ust_abi_event_exclusion *exclusion, |
| 518 | struct lttng_ust_abi_object_data *obj_data) |
| 519 | { |
| 520 | struct ustcomm_ust_msg lum; |
| 521 | struct ustcomm_ust_reply lur; |
| 522 | int ret; |
| 523 | |
| 524 | if (!obj_data) { |
| 525 | return -EINVAL; |
| 526 | } |
| 527 | |
| 528 | memset(&lum, 0, sizeof(lum)); |
| 529 | lum.handle = obj_data->handle; |
| 530 | lum.cmd = LTTNG_UST_ABI_EXCLUSION; |
| 531 | lum.u.exclusion.count = exclusion->count; |
| 532 | |
| 533 | ret = ustcomm_send_app_msg(sock, &lum); |
| 534 | if (ret) { |
| 535 | return ret; |
| 536 | } |
| 537 | |
| 538 | /* send var len exclusion names */ |
| 539 | ret = ustcomm_send_unix_sock(sock, |
| 540 | exclusion->names, |
| 541 | exclusion->count * LTTNG_UST_ABI_SYM_NAME_LEN); |
| 542 | if (ret < 0) { |
| 543 | return ret; |
| 544 | } |
| 545 | if (ret != exclusion->count * LTTNG_UST_ABI_SYM_NAME_LEN) { |
| 546 | return -EINVAL; |
| 547 | } |
| 548 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 549 | if (ret == -EINVAL) { |
| 550 | /* |
| 551 | * Command unknown from remote end. The communication socket is |
| 552 | * now out-of-sync and needs to be shutdown. |
| 553 | */ |
| 554 | (void) ustcomm_shutdown_unix_sock(sock); |
| 555 | } |
| 556 | return ret; |
| 557 | } |
| 558 | |
| 559 | /* Enable event, channel and session ioctl */ |
| 560 | int lttng_ust_ctl_enable(int sock, struct lttng_ust_abi_object_data *object) |
| 561 | { |
| 562 | struct ustcomm_ust_msg lum; |
| 563 | struct ustcomm_ust_reply lur; |
| 564 | int ret; |
| 565 | |
| 566 | if (!object) |
| 567 | return -EINVAL; |
| 568 | |
| 569 | memset(&lum, 0, sizeof(lum)); |
| 570 | lum.handle = object->handle; |
| 571 | lum.cmd = LTTNG_UST_ABI_ENABLE; |
| 572 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 573 | if (ret) |
| 574 | return ret; |
| 575 | DBG("enabled handle %u", object->handle); |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | /* Disable event, channel and session ioctl */ |
| 580 | int lttng_ust_ctl_disable(int sock, struct lttng_ust_abi_object_data *object) |
| 581 | { |
| 582 | struct ustcomm_ust_msg lum; |
| 583 | struct ustcomm_ust_reply lur; |
| 584 | int ret; |
| 585 | |
| 586 | if (!object) |
| 587 | return -EINVAL; |
| 588 | |
| 589 | memset(&lum, 0, sizeof(lum)); |
| 590 | lum.handle = object->handle; |
| 591 | lum.cmd = LTTNG_UST_ABI_DISABLE; |
| 592 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 593 | if (ret) |
| 594 | return ret; |
| 595 | DBG("disable handle %u", object->handle); |
| 596 | return 0; |
| 597 | } |
| 598 | |
| 599 | int lttng_ust_ctl_start_session(int sock, int handle) |
| 600 | { |
| 601 | struct lttng_ust_abi_object_data obj; |
| 602 | |
| 603 | obj.handle = handle; |
| 604 | return lttng_ust_ctl_enable(sock, &obj); |
| 605 | } |
| 606 | |
| 607 | int lttng_ust_ctl_stop_session(int sock, int handle) |
| 608 | { |
| 609 | struct lttng_ust_abi_object_data obj; |
| 610 | |
| 611 | obj.handle = handle; |
| 612 | return lttng_ust_ctl_disable(sock, &obj); |
| 613 | } |
| 614 | |
| 615 | /* |
| 616 | * Protocol for LTTNG_UST_ABI_EVENT_NOTIFIER_GROUP_CREATE command: |
| 617 | * |
| 618 | * - send: struct ustcomm_ust_msg |
| 619 | * - receive: struct ustcomm_ust_reply |
| 620 | * - send: file descriptor |
| 621 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 622 | */ |
| 623 | int lttng_ust_ctl_create_event_notifier_group(int sock, int pipe_fd, |
| 624 | struct lttng_ust_abi_object_data **_event_notifier_group_data) |
| 625 | { |
| 626 | struct lttng_ust_abi_object_data *event_notifier_group_data; |
| 627 | struct ustcomm_ust_msg lum; |
| 628 | struct ustcomm_ust_reply lur; |
| 629 | ssize_t len; |
| 630 | int ret; |
| 631 | |
| 632 | if (!_event_notifier_group_data) |
| 633 | return -EINVAL; |
| 634 | |
| 635 | event_notifier_group_data = zmalloc(sizeof(*event_notifier_group_data)); |
| 636 | if (!event_notifier_group_data) |
| 637 | return -ENOMEM; |
| 638 | |
| 639 | event_notifier_group_data->type = LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER_GROUP; |
| 640 | |
| 641 | memset(&lum, 0, sizeof(lum)); |
| 642 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
| 643 | lum.cmd = LTTNG_UST_ABI_EVENT_NOTIFIER_GROUP_CREATE; |
| 644 | |
| 645 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 646 | if (ret) |
| 647 | goto error; |
| 648 | |
| 649 | /* Send event_notifier notification pipe. */ |
| 650 | len = ustcomm_send_fds_unix_sock(sock, &pipe_fd, 1); |
| 651 | if (len <= 0) { |
| 652 | ret = len; |
| 653 | goto error; |
| 654 | } |
| 655 | |
| 656 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 657 | if (ret) |
| 658 | goto error; |
| 659 | |
| 660 | event_notifier_group_data->handle = lur.ret_val; |
| 661 | DBG("received event_notifier group handle %d", event_notifier_group_data->handle); |
| 662 | |
| 663 | *_event_notifier_group_data = event_notifier_group_data; |
| 664 | |
| 665 | ret = 0; |
| 666 | goto end; |
| 667 | error: |
| 668 | free(event_notifier_group_data); |
| 669 | |
| 670 | end: |
| 671 | return ret; |
| 672 | } |
| 673 | |
| 674 | /* |
| 675 | * Protocol for LTTNG_UST_ABI_EVENT_NOTIFIER_CREATE command: |
| 676 | * |
| 677 | * - send: struct ustcomm_ust_msg |
| 678 | * - receive: struct ustcomm_ust_reply |
| 679 | * - send: struct lttng_ust_abi_event_notifier |
| 680 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 681 | */ |
| 682 | int lttng_ust_ctl_create_event_notifier(int sock, struct lttng_ust_abi_event_notifier *event_notifier, |
| 683 | struct lttng_ust_abi_object_data *event_notifier_group, |
| 684 | struct lttng_ust_abi_object_data **_event_notifier_data) |
| 685 | { |
| 686 | struct ustcomm_ust_msg lum = {}; |
| 687 | struct ustcomm_ust_reply lur; |
| 688 | struct lttng_ust_abi_object_data *event_notifier_data; |
| 689 | ssize_t len; |
| 690 | int ret; |
| 691 | |
| 692 | if (!event_notifier_group || !_event_notifier_data) |
| 693 | return -EINVAL; |
| 694 | |
| 695 | event_notifier_data = zmalloc(sizeof(*event_notifier_data)); |
| 696 | if (!event_notifier_data) |
| 697 | return -ENOMEM; |
| 698 | |
| 699 | event_notifier_data->type = LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER; |
| 700 | |
| 701 | lum.handle = event_notifier_group->handle; |
| 702 | lum.cmd = LTTNG_UST_ABI_EVENT_NOTIFIER_CREATE; |
| 703 | lum.u.var_len_cmd.cmd_len = sizeof(*event_notifier); |
| 704 | |
| 705 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 706 | if (ret) { |
| 707 | free(event_notifier_data); |
| 708 | return ret; |
| 709 | } |
| 710 | /* Send struct lttng_ust_abi_event_notifier */ |
| 711 | len = ustcomm_send_unix_sock(sock, event_notifier, sizeof(*event_notifier)); |
| 712 | if (len != sizeof(*event_notifier)) { |
| 713 | free(event_notifier_data); |
| 714 | if (len < 0) |
| 715 | return len; |
| 716 | else |
| 717 | return -EIO; |
| 718 | } |
| 719 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 720 | if (ret) { |
| 721 | free(event_notifier_data); |
| 722 | return ret; |
| 723 | } |
| 724 | event_notifier_data->handle = lur.ret_val; |
| 725 | DBG("received event_notifier handle %u", event_notifier_data->handle); |
| 726 | *_event_notifier_data = event_notifier_data; |
| 727 | |
| 728 | return ret; |
| 729 | } |
| 730 | |
| 731 | int lttng_ust_ctl_tracepoint_list(int sock) |
| 732 | { |
| 733 | struct ustcomm_ust_msg lum; |
| 734 | struct ustcomm_ust_reply lur; |
| 735 | int ret, tp_list_handle; |
| 736 | |
| 737 | memset(&lum, 0, sizeof(lum)); |
| 738 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
| 739 | lum.cmd = LTTNG_UST_ABI_TRACEPOINT_LIST; |
| 740 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 741 | if (ret) |
| 742 | return ret; |
| 743 | tp_list_handle = lur.ret_val; |
| 744 | DBG("received tracepoint list handle %u", tp_list_handle); |
| 745 | return tp_list_handle; |
| 746 | } |
| 747 | |
| 748 | int lttng_ust_ctl_tracepoint_list_get(int sock, int tp_list_handle, |
| 749 | struct lttng_ust_abi_tracepoint_iter *iter) |
| 750 | { |
| 751 | struct ustcomm_ust_msg lum; |
| 752 | struct ustcomm_ust_reply lur; |
| 753 | int ret; |
| 754 | |
| 755 | if (!iter) |
| 756 | return -EINVAL; |
| 757 | |
| 758 | memset(&lum, 0, sizeof(lum)); |
| 759 | lum.handle = tp_list_handle; |
| 760 | lum.cmd = LTTNG_UST_ABI_TRACEPOINT_LIST_GET; |
| 761 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 762 | if (ret) |
| 763 | return ret; |
| 764 | DBG("received tracepoint list entry name %s loglevel %d", |
| 765 | lur.u.tracepoint.name, |
| 766 | lur.u.tracepoint.loglevel); |
| 767 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
| 768 | return 0; |
| 769 | } |
| 770 | |
| 771 | int lttng_ust_ctl_tracepoint_field_list(int sock) |
| 772 | { |
| 773 | struct ustcomm_ust_msg lum; |
| 774 | struct ustcomm_ust_reply lur; |
| 775 | int ret, tp_field_list_handle; |
| 776 | |
| 777 | memset(&lum, 0, sizeof(lum)); |
| 778 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
| 779 | lum.cmd = LTTNG_UST_ABI_TRACEPOINT_FIELD_LIST; |
| 780 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 781 | if (ret) |
| 782 | return ret; |
| 783 | tp_field_list_handle = lur.ret_val; |
| 784 | DBG("received tracepoint field list handle %u", tp_field_list_handle); |
| 785 | return tp_field_list_handle; |
| 786 | } |
| 787 | |
| 788 | int lttng_ust_ctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, |
| 789 | struct lttng_ust_abi_field_iter *iter) |
| 790 | { |
| 791 | struct ustcomm_ust_msg lum; |
| 792 | struct ustcomm_ust_reply lur; |
| 793 | int ret; |
| 794 | ssize_t len; |
| 795 | |
| 796 | if (!iter) |
| 797 | return -EINVAL; |
| 798 | |
| 799 | memset(&lum, 0, sizeof(lum)); |
| 800 | lum.handle = tp_field_list_handle; |
| 801 | lum.cmd = LTTNG_UST_ABI_TRACEPOINT_FIELD_LIST_GET; |
| 802 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 803 | if (ret) |
| 804 | return ret; |
| 805 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); |
| 806 | if (len != sizeof(*iter)) { |
| 807 | return -EINVAL; |
| 808 | } |
| 809 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", |
| 810 | iter->event_name, |
| 811 | iter->loglevel, |
| 812 | iter->field_name, |
| 813 | iter->type); |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | int lttng_ust_ctl_tracer_version(int sock, struct lttng_ust_abi_tracer_version *v) |
| 818 | { |
| 819 | struct ustcomm_ust_msg lum; |
| 820 | struct ustcomm_ust_reply lur; |
| 821 | int ret; |
| 822 | |
| 823 | if (!v) |
| 824 | return -EINVAL; |
| 825 | |
| 826 | memset(&lum, 0, sizeof(lum)); |
| 827 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
| 828 | lum.cmd = LTTNG_UST_ABI_TRACER_VERSION; |
| 829 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 830 | if (ret) |
| 831 | return ret; |
| 832 | memcpy(v, &lur.u.version, sizeof(*v)); |
| 833 | DBG("received tracer version"); |
| 834 | return 0; |
| 835 | } |
| 836 | |
| 837 | int lttng_ust_ctl_wait_quiescent(int sock) |
| 838 | { |
| 839 | struct ustcomm_ust_msg lum; |
| 840 | struct ustcomm_ust_reply lur; |
| 841 | int ret; |
| 842 | |
| 843 | memset(&lum, 0, sizeof(lum)); |
| 844 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
| 845 | lum.cmd = LTTNG_UST_ABI_WAIT_QUIESCENT; |
| 846 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 847 | if (ret) |
| 848 | return ret; |
| 849 | DBG("waited for quiescent state"); |
| 850 | return 0; |
| 851 | } |
| 852 | |
| 853 | int lttng_ust_ctl_calibrate(int sock __attribute__((unused)), |
| 854 | struct lttng_ust_abi_calibrate *calibrate) |
| 855 | { |
| 856 | if (!calibrate) |
| 857 | return -EINVAL; |
| 858 | |
| 859 | return -ENOSYS; |
| 860 | } |
| 861 | |
| 862 | int lttng_ust_ctl_sock_flush_buffer(int sock, struct lttng_ust_abi_object_data *object) |
| 863 | { |
| 864 | struct ustcomm_ust_msg lum; |
| 865 | struct ustcomm_ust_reply lur; |
| 866 | int ret; |
| 867 | |
| 868 | if (!object) |
| 869 | return -EINVAL; |
| 870 | |
| 871 | memset(&lum, 0, sizeof(lum)); |
| 872 | lum.handle = object->handle; |
| 873 | lum.cmd = LTTNG_UST_ABI_FLUSH_BUFFER; |
| 874 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 875 | if (ret) |
| 876 | return ret; |
| 877 | DBG("flushed buffer handle %u", object->handle); |
| 878 | return 0; |
| 879 | } |
| 880 | |
| 881 | static |
| 882 | int lttng_ust_ctl_send_channel(int sock, |
| 883 | enum lttng_ust_abi_chan_type type, |
| 884 | void *data, |
| 885 | uint64_t size, |
| 886 | int wakeup_fd, |
| 887 | int send_fd_only) |
| 888 | { |
| 889 | ssize_t len; |
| 890 | |
| 891 | if (!send_fd_only) { |
| 892 | /* Send mmap size */ |
| 893 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); |
| 894 | if (len != sizeof(size)) { |
| 895 | if (len < 0) |
| 896 | return len; |
| 897 | else |
| 898 | return -EIO; |
| 899 | } |
| 900 | |
| 901 | /* Send channel type */ |
| 902 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); |
| 903 | if (len != sizeof(type)) { |
| 904 | if (len < 0) |
| 905 | return len; |
| 906 | else |
| 907 | return -EIO; |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | /* Send channel data */ |
| 912 | len = ustcomm_send_unix_sock(sock, data, size); |
| 913 | if (len != size) { |
| 914 | if (len < 0) |
| 915 | return len; |
| 916 | else |
| 917 | return -EIO; |
| 918 | } |
| 919 | |
| 920 | /* Send wakeup fd */ |
| 921 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); |
| 922 | if (len <= 0) { |
| 923 | if (len < 0) |
| 924 | return len; |
| 925 | else |
| 926 | return -EIO; |
| 927 | } |
| 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | static |
| 932 | int lttng_ust_ctl_send_stream(int sock, |
| 933 | uint32_t stream_nr, |
| 934 | uint64_t memory_map_size, |
| 935 | int shm_fd, int wakeup_fd, |
| 936 | int send_fd_only) |
| 937 | { |
| 938 | ssize_t len; |
| 939 | int fds[2]; |
| 940 | |
| 941 | if (!send_fd_only) { |
| 942 | if (shm_fd < 0) { |
| 943 | /* finish iteration */ |
| 944 | uint64_t v = -1; |
| 945 | |
| 946 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); |
| 947 | if (len != sizeof(v)) { |
| 948 | if (len < 0) |
| 949 | return len; |
| 950 | else |
| 951 | return -EIO; |
| 952 | } |
| 953 | return 0; |
| 954 | } |
| 955 | |
| 956 | /* Send mmap size */ |
| 957 | len = ustcomm_send_unix_sock(sock, &memory_map_size, |
| 958 | sizeof(memory_map_size)); |
| 959 | if (len != sizeof(memory_map_size)) { |
| 960 | if (len < 0) |
| 961 | return len; |
| 962 | else |
| 963 | return -EIO; |
| 964 | } |
| 965 | |
| 966 | /* Send stream nr */ |
| 967 | len = ustcomm_send_unix_sock(sock, &stream_nr, |
| 968 | sizeof(stream_nr)); |
| 969 | if (len != sizeof(stream_nr)) { |
| 970 | if (len < 0) |
| 971 | return len; |
| 972 | else |
| 973 | return -EIO; |
| 974 | } |
| 975 | } |
| 976 | |
| 977 | /* Send shm fd and wakeup fd */ |
| 978 | fds[0] = shm_fd; |
| 979 | fds[1] = wakeup_fd; |
| 980 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); |
| 981 | if (len <= 0) { |
| 982 | if (len < 0) |
| 983 | return len; |
| 984 | else |
| 985 | return -EIO; |
| 986 | } |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | int lttng_ust_ctl_recv_channel_from_consumer(int sock, |
| 991 | struct lttng_ust_abi_object_data **_channel_data) |
| 992 | { |
| 993 | struct lttng_ust_abi_object_data *channel_data; |
| 994 | ssize_t len; |
| 995 | int wakeup_fd; |
| 996 | int ret; |
| 997 | |
| 998 | channel_data = zmalloc(sizeof(*channel_data)); |
| 999 | if (!channel_data) { |
| 1000 | ret = -ENOMEM; |
| 1001 | goto error_alloc; |
| 1002 | } |
| 1003 | channel_data->type = LTTNG_UST_ABI_OBJECT_TYPE_CHANNEL; |
| 1004 | channel_data->handle = -1; |
| 1005 | |
| 1006 | /* recv mmap size */ |
| 1007 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, |
| 1008 | sizeof(channel_data->size)); |
| 1009 | if (len != sizeof(channel_data->size)) { |
| 1010 | if (len < 0) |
| 1011 | ret = len; |
| 1012 | else |
| 1013 | ret = -EINVAL; |
| 1014 | goto error; |
| 1015 | } |
| 1016 | |
| 1017 | /* recv channel type */ |
| 1018 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, |
| 1019 | sizeof(channel_data->u.channel.type)); |
| 1020 | if (len != sizeof(channel_data->u.channel.type)) { |
| 1021 | if (len < 0) |
| 1022 | ret = len; |
| 1023 | else |
| 1024 | ret = -EINVAL; |
| 1025 | goto error; |
| 1026 | } |
| 1027 | |
| 1028 | /* recv channel data */ |
| 1029 | channel_data->u.channel.data = zmalloc(channel_data->size); |
| 1030 | if (!channel_data->u.channel.data) { |
| 1031 | ret = -ENOMEM; |
| 1032 | goto error; |
| 1033 | } |
| 1034 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, |
| 1035 | channel_data->size); |
| 1036 | if (len != channel_data->size) { |
| 1037 | if (len < 0) |
| 1038 | ret = len; |
| 1039 | else |
| 1040 | ret = -EINVAL; |
| 1041 | goto error_recv_data; |
| 1042 | } |
| 1043 | /* recv wakeup fd */ |
| 1044 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
| 1045 | if (len <= 0) { |
| 1046 | if (len < 0) { |
| 1047 | ret = len; |
| 1048 | goto error_recv_data; |
| 1049 | } else { |
| 1050 | ret = -EIO; |
| 1051 | goto error_recv_data; |
| 1052 | } |
| 1053 | } |
| 1054 | channel_data->u.channel.wakeup_fd = wakeup_fd; |
| 1055 | *_channel_data = channel_data; |
| 1056 | return 0; |
| 1057 | |
| 1058 | error_recv_data: |
| 1059 | free(channel_data->u.channel.data); |
| 1060 | error: |
| 1061 | free(channel_data); |
| 1062 | error_alloc: |
| 1063 | return ret; |
| 1064 | } |
| 1065 | |
| 1066 | int lttng_ust_ctl_recv_stream_from_consumer(int sock, |
| 1067 | struct lttng_ust_abi_object_data **_stream_data) |
| 1068 | { |
| 1069 | struct lttng_ust_abi_object_data *stream_data; |
| 1070 | ssize_t len; |
| 1071 | int ret; |
| 1072 | int fds[2]; |
| 1073 | |
| 1074 | stream_data = zmalloc(sizeof(*stream_data)); |
| 1075 | if (!stream_data) { |
| 1076 | ret = -ENOMEM; |
| 1077 | goto error_alloc; |
| 1078 | } |
| 1079 | |
| 1080 | stream_data->type = LTTNG_UST_ABI_OBJECT_TYPE_STREAM; |
| 1081 | stream_data->handle = -1; |
| 1082 | |
| 1083 | /* recv mmap size */ |
| 1084 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, |
| 1085 | sizeof(stream_data->size)); |
| 1086 | if (len != sizeof(stream_data->size)) { |
| 1087 | if (len < 0) |
| 1088 | ret = len; |
| 1089 | else |
| 1090 | ret = -EINVAL; |
| 1091 | goto error; |
| 1092 | } |
| 1093 | if (stream_data->size == -1) { |
| 1094 | ret = -LTTNG_UST_ERR_NOENT; |
| 1095 | goto error; |
| 1096 | } |
| 1097 | |
| 1098 | /* recv stream nr */ |
| 1099 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, |
| 1100 | sizeof(stream_data->u.stream.stream_nr)); |
| 1101 | if (len != sizeof(stream_data->u.stream.stream_nr)) { |
| 1102 | if (len < 0) |
| 1103 | ret = len; |
| 1104 | else |
| 1105 | ret = -EINVAL; |
| 1106 | goto error; |
| 1107 | } |
| 1108 | |
| 1109 | /* recv shm fd and wakeup fd */ |
| 1110 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
| 1111 | if (len <= 0) { |
| 1112 | if (len < 0) { |
| 1113 | ret = len; |
| 1114 | goto error; |
| 1115 | } else { |
| 1116 | ret = -EIO; |
| 1117 | goto error; |
| 1118 | } |
| 1119 | } |
| 1120 | stream_data->u.stream.shm_fd = fds[0]; |
| 1121 | stream_data->u.stream.wakeup_fd = fds[1]; |
| 1122 | *_stream_data = stream_data; |
| 1123 | return 0; |
| 1124 | |
| 1125 | error: |
| 1126 | free(stream_data); |
| 1127 | error_alloc: |
| 1128 | return ret; |
| 1129 | } |
| 1130 | |
| 1131 | /* |
| 1132 | * Protocol for LTTNG_UST_ABI_CHANNEL command: |
| 1133 | * |
| 1134 | * - send: struct ustcomm_ust_msg |
| 1135 | * - send: file descriptors and channel data |
| 1136 | * - receive: struct ustcomm_ust_reply |
| 1137 | * |
| 1138 | * TODO: At the next breaking protocol bump, we should indicate the total |
| 1139 | * command message length as part of a message header so that the protocol can |
| 1140 | * recover from invalid command errors. |
| 1141 | */ |
| 1142 | int lttng_ust_ctl_send_channel_to_ust(int sock, int session_handle, |
| 1143 | struct lttng_ust_abi_object_data *channel_data) |
| 1144 | { |
| 1145 | struct ustcomm_ust_msg lum; |
| 1146 | struct ustcomm_ust_reply lur; |
| 1147 | int ret; |
| 1148 | |
| 1149 | if (!channel_data) |
| 1150 | return -EINVAL; |
| 1151 | |
| 1152 | memset(&lum, 0, sizeof(lum)); |
| 1153 | lum.handle = session_handle; |
| 1154 | lum.cmd = LTTNG_UST_ABI_CHANNEL; |
| 1155 | lum.u.channel.len = channel_data->size; |
| 1156 | lum.u.channel.type = channel_data->u.channel.type; |
| 1157 | ret = ustcomm_send_app_msg(sock, &lum); |
| 1158 | if (ret) |
| 1159 | return ret; |
| 1160 | |
| 1161 | ret = lttng_ust_ctl_send_channel(sock, |
| 1162 | channel_data->u.channel.type, |
| 1163 | channel_data->u.channel.data, |
| 1164 | channel_data->size, |
| 1165 | channel_data->u.channel.wakeup_fd, |
| 1166 | 1); |
| 1167 | if (ret) |
| 1168 | return ret; |
| 1169 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 1170 | if (!ret) { |
| 1171 | channel_data->handle = lur.ret_val; |
| 1172 | } else if (ret == -EINVAL) { |
| 1173 | /* |
| 1174 | * Command unknown from remote end. The communication socket is |
| 1175 | * now out-of-sync and needs to be shutdown. |
| 1176 | */ |
| 1177 | (void) ustcomm_shutdown_unix_sock(sock); |
| 1178 | } |
| 1179 | return ret; |
| 1180 | } |
| 1181 | |
| 1182 | /* |
| 1183 | * Protocol for LTTNG_UST_ABI_STREAM command: |
| 1184 | * |
| 1185 | * - send: struct ustcomm_ust_msg |
| 1186 | * - send: file descriptors and stream data |
| 1187 | * - receive: struct ustcomm_ust_reply |
| 1188 | * |
| 1189 | * TODO: At the next breaking protocol bump, we should indicate the total |
| 1190 | * command message length as part of a message header so that the protocol can |
| 1191 | * recover from invalid command errors. |
| 1192 | */ |
| 1193 | int lttng_ust_ctl_send_stream_to_ust(int sock, |
| 1194 | struct lttng_ust_abi_object_data *channel_data, |
| 1195 | struct lttng_ust_abi_object_data *stream_data) |
| 1196 | { |
| 1197 | struct ustcomm_ust_msg lum; |
| 1198 | struct ustcomm_ust_reply lur; |
| 1199 | int ret; |
| 1200 | |
| 1201 | memset(&lum, 0, sizeof(lum)); |
| 1202 | lum.handle = channel_data->handle; |
| 1203 | lum.cmd = LTTNG_UST_ABI_STREAM; |
| 1204 | lum.u.stream.len = stream_data->size; |
| 1205 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; |
| 1206 | ret = ustcomm_send_app_msg(sock, &lum); |
| 1207 | if (ret) |
| 1208 | return ret; |
| 1209 | |
| 1210 | assert(stream_data); |
| 1211 | assert(stream_data->type == LTTNG_UST_ABI_OBJECT_TYPE_STREAM); |
| 1212 | |
| 1213 | ret = lttng_ust_ctl_send_stream(sock, |
| 1214 | stream_data->u.stream.stream_nr, |
| 1215 | stream_data->size, |
| 1216 | stream_data->u.stream.shm_fd, |
| 1217 | stream_data->u.stream.wakeup_fd, 1); |
| 1218 | if (ret) |
| 1219 | return ret; |
| 1220 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 1221 | if (ret == -EINVAL) { |
| 1222 | /* |
| 1223 | * Command unknown from remote end. The communication socket is |
| 1224 | * now out-of-sync and needs to be shutdown. |
| 1225 | */ |
| 1226 | (void) ustcomm_shutdown_unix_sock(sock); |
| 1227 | } |
| 1228 | return ret; |
| 1229 | } |
| 1230 | |
| 1231 | int lttng_ust_ctl_duplicate_ust_object_data(struct lttng_ust_abi_object_data **dest, |
| 1232 | struct lttng_ust_abi_object_data *src) |
| 1233 | { |
| 1234 | struct lttng_ust_abi_object_data *obj; |
| 1235 | int ret; |
| 1236 | |
| 1237 | if (src->handle != -1) { |
| 1238 | ret = -EINVAL; |
| 1239 | goto error; |
| 1240 | } |
| 1241 | |
| 1242 | obj = zmalloc(sizeof(*obj)); |
| 1243 | if (!obj) { |
| 1244 | ret = -ENOMEM; |
| 1245 | goto error; |
| 1246 | } |
| 1247 | |
| 1248 | obj->type = src->type; |
| 1249 | obj->handle = src->handle; |
| 1250 | obj->size = src->size; |
| 1251 | |
| 1252 | switch (obj->type) { |
| 1253 | case LTTNG_UST_ABI_OBJECT_TYPE_CHANNEL: |
| 1254 | { |
| 1255 | obj->u.channel.type = src->u.channel.type; |
| 1256 | if (src->u.channel.wakeup_fd >= 0) { |
| 1257 | obj->u.channel.wakeup_fd = |
| 1258 | dup(src->u.channel.wakeup_fd); |
| 1259 | if (obj->u.channel.wakeup_fd < 0) { |
| 1260 | ret = -errno; |
| 1261 | goto chan_error_wakeup_fd; |
| 1262 | } |
| 1263 | } else { |
| 1264 | obj->u.channel.wakeup_fd = |
| 1265 | src->u.channel.wakeup_fd; |
| 1266 | } |
| 1267 | obj->u.channel.data = zmalloc(obj->size); |
| 1268 | if (!obj->u.channel.data) { |
| 1269 | ret = -ENOMEM; |
| 1270 | goto chan_error_alloc; |
| 1271 | } |
| 1272 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); |
| 1273 | break; |
| 1274 | |
| 1275 | chan_error_alloc: |
| 1276 | if (src->u.channel.wakeup_fd >= 0) { |
| 1277 | int closeret; |
| 1278 | |
| 1279 | closeret = close(obj->u.channel.wakeup_fd); |
| 1280 | if (closeret) { |
| 1281 | PERROR("close"); |
| 1282 | } |
| 1283 | } |
| 1284 | chan_error_wakeup_fd: |
| 1285 | goto error_type; |
| 1286 | |
| 1287 | } |
| 1288 | |
| 1289 | case LTTNG_UST_ABI_OBJECT_TYPE_STREAM: |
| 1290 | { |
| 1291 | obj->u.stream.stream_nr = src->u.stream.stream_nr; |
| 1292 | if (src->u.stream.wakeup_fd >= 0) { |
| 1293 | obj->u.stream.wakeup_fd = |
| 1294 | dup(src->u.stream.wakeup_fd); |
| 1295 | if (obj->u.stream.wakeup_fd < 0) { |
| 1296 | ret = -errno; |
| 1297 | goto stream_error_wakeup_fd; |
| 1298 | } |
| 1299 | } else { |
| 1300 | obj->u.stream.wakeup_fd = |
| 1301 | src->u.stream.wakeup_fd; |
| 1302 | } |
| 1303 | |
| 1304 | if (src->u.stream.shm_fd >= 0) { |
| 1305 | obj->u.stream.shm_fd = |
| 1306 | dup(src->u.stream.shm_fd); |
| 1307 | if (obj->u.stream.shm_fd < 0) { |
| 1308 | ret = -errno; |
| 1309 | goto stream_error_shm_fd; |
| 1310 | } |
| 1311 | } else { |
| 1312 | obj->u.stream.shm_fd = |
| 1313 | src->u.stream.shm_fd; |
| 1314 | } |
| 1315 | break; |
| 1316 | |
| 1317 | stream_error_shm_fd: |
| 1318 | if (src->u.stream.wakeup_fd >= 0) { |
| 1319 | int closeret; |
| 1320 | |
| 1321 | closeret = close(obj->u.stream.wakeup_fd); |
| 1322 | if (closeret) { |
| 1323 | PERROR("close"); |
| 1324 | } |
| 1325 | } |
| 1326 | stream_error_wakeup_fd: |
| 1327 | goto error_type; |
| 1328 | } |
| 1329 | |
| 1330 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER: |
| 1331 | { |
| 1332 | obj->u.counter.data = zmalloc(obj->size); |
| 1333 | if (!obj->u.counter.data) { |
| 1334 | ret = -ENOMEM; |
| 1335 | goto error_type; |
| 1336 | } |
| 1337 | memcpy(obj->u.counter.data, src->u.counter.data, obj->size); |
| 1338 | break; |
| 1339 | } |
| 1340 | |
| 1341 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_GLOBAL: |
| 1342 | { |
| 1343 | if (src->u.counter_global.shm_fd >= 0) { |
| 1344 | obj->u.counter_global.shm_fd = |
| 1345 | dup(src->u.counter_global.shm_fd); |
| 1346 | if (obj->u.counter_global.shm_fd < 0) { |
| 1347 | ret = -errno; |
| 1348 | goto error_type; |
| 1349 | } |
| 1350 | } |
| 1351 | break; |
| 1352 | } |
| 1353 | |
| 1354 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_CPU: |
| 1355 | { |
| 1356 | obj->u.counter_cpu.cpu_nr = src->u.counter_cpu.cpu_nr; |
| 1357 | if (src->u.counter_cpu.shm_fd >= 0) { |
| 1358 | obj->u.counter_cpu.shm_fd = |
| 1359 | dup(src->u.counter_cpu.shm_fd); |
| 1360 | if (obj->u.counter_cpu.shm_fd < 0) { |
| 1361 | ret = -errno; |
| 1362 | goto error_type; |
| 1363 | } |
| 1364 | } |
| 1365 | break; |
| 1366 | } |
| 1367 | |
| 1368 | default: |
| 1369 | ret = -EINVAL; |
| 1370 | goto error_type; |
| 1371 | } |
| 1372 | |
| 1373 | *dest = obj; |
| 1374 | return 0; |
| 1375 | |
| 1376 | error_type: |
| 1377 | free(obj); |
| 1378 | error: |
| 1379 | return ret; |
| 1380 | } |
| 1381 | |
| 1382 | |
| 1383 | /* Buffer operations */ |
| 1384 | |
| 1385 | int lttng_ust_ctl_get_nr_stream_per_channel(void) |
| 1386 | { |
| 1387 | return get_possible_cpus_array_len(); |
| 1388 | } |
| 1389 | |
| 1390 | struct lttng_ust_ctl_consumer_channel * |
| 1391 | lttng_ust_ctl_create_channel(struct lttng_ust_ctl_consumer_channel_attr *attr, |
| 1392 | const int *stream_fds, int nr_stream_fds) |
| 1393 | { |
| 1394 | struct lttng_ust_ctl_consumer_channel *chan; |
| 1395 | const char *transport_name; |
| 1396 | struct lttng_transport *transport; |
| 1397 | |
| 1398 | switch (attr->type) { |
| 1399 | case LTTNG_UST_ABI_CHAN_PER_CPU: |
| 1400 | if (attr->output == LTTNG_UST_ABI_MMAP) { |
| 1401 | if (attr->overwrite) { |
| 1402 | if (attr->read_timer_interval == 0) { |
| 1403 | transport_name = "relay-overwrite-mmap"; |
| 1404 | } else { |
| 1405 | transport_name = "relay-overwrite-rt-mmap"; |
| 1406 | } |
| 1407 | } else { |
| 1408 | if (attr->read_timer_interval == 0) { |
| 1409 | transport_name = "relay-discard-mmap"; |
| 1410 | } else { |
| 1411 | transport_name = "relay-discard-rt-mmap"; |
| 1412 | } |
| 1413 | } |
| 1414 | } else { |
| 1415 | return NULL; |
| 1416 | } |
| 1417 | break; |
| 1418 | case LTTNG_UST_ABI_CHAN_METADATA: |
| 1419 | if (attr->output == LTTNG_UST_ABI_MMAP) |
| 1420 | transport_name = "relay-metadata-mmap"; |
| 1421 | else |
| 1422 | return NULL; |
| 1423 | break; |
| 1424 | default: |
| 1425 | transport_name = "<unknown>"; |
| 1426 | return NULL; |
| 1427 | } |
| 1428 | |
| 1429 | transport = lttng_ust_transport_find(transport_name); |
| 1430 | if (!transport) { |
| 1431 | DBG("LTTng transport %s not found\n", |
| 1432 | transport_name); |
| 1433 | return NULL; |
| 1434 | } |
| 1435 | |
| 1436 | chan = zmalloc(sizeof(*chan)); |
| 1437 | if (!chan) |
| 1438 | return NULL; |
| 1439 | |
| 1440 | chan->chan = transport->ops.priv->channel_create(transport_name, NULL, |
| 1441 | attr->subbuf_size, attr->num_subbuf, |
| 1442 | attr->switch_timer_interval, |
| 1443 | attr->read_timer_interval, |
| 1444 | attr->uuid, attr->chan_id, |
| 1445 | stream_fds, nr_stream_fds, |
| 1446 | attr->blocking_timeout); |
| 1447 | if (!chan->chan) { |
| 1448 | goto chan_error; |
| 1449 | } |
| 1450 | chan->chan->ops = &transport->ops; |
| 1451 | memcpy(&chan->attr, attr, sizeof(chan->attr)); |
| 1452 | chan->wait_fd = lttng_ust_ctl_channel_get_wait_fd(chan); |
| 1453 | chan->wakeup_fd = lttng_ust_ctl_channel_get_wakeup_fd(chan); |
| 1454 | return chan; |
| 1455 | |
| 1456 | chan_error: |
| 1457 | free(chan); |
| 1458 | return NULL; |
| 1459 | } |
| 1460 | |
| 1461 | void lttng_ust_ctl_destroy_channel(struct lttng_ust_ctl_consumer_channel *chan) |
| 1462 | { |
| 1463 | (void) lttng_ust_ctl_channel_close_wait_fd(chan); |
| 1464 | (void) lttng_ust_ctl_channel_close_wakeup_fd(chan); |
| 1465 | chan->chan->ops->priv->channel_destroy(chan->chan); |
| 1466 | free(chan); |
| 1467 | } |
| 1468 | |
| 1469 | int lttng_ust_ctl_send_channel_to_sessiond(int sock, |
| 1470 | struct lttng_ust_ctl_consumer_channel *channel) |
| 1471 | { |
| 1472 | struct shm_object_table *table; |
| 1473 | |
| 1474 | table = channel->chan->priv->rb_chan->handle->table; |
| 1475 | if (table->size <= 0) |
| 1476 | return -EINVAL; |
| 1477 | return lttng_ust_ctl_send_channel(sock, |
| 1478 | channel->attr.type, |
| 1479 | table->objects[0].memory_map, |
| 1480 | table->objects[0].memory_map_size, |
| 1481 | channel->wakeup_fd, |
| 1482 | 0); |
| 1483 | } |
| 1484 | |
| 1485 | int lttng_ust_ctl_send_stream_to_sessiond(int sock, |
| 1486 | struct lttng_ust_ctl_consumer_stream *stream) |
| 1487 | { |
| 1488 | if (!stream) |
| 1489 | return lttng_ust_ctl_send_stream(sock, -1U, -1U, -1, -1, 0); |
| 1490 | |
| 1491 | return lttng_ust_ctl_send_stream(sock, |
| 1492 | stream->cpu, |
| 1493 | stream->memory_map_size, |
| 1494 | stream->shm_fd, stream->wakeup_fd, |
| 1495 | 0); |
| 1496 | } |
| 1497 | |
| 1498 | int lttng_ust_ctl_write_metadata_to_channel( |
| 1499 | struct lttng_ust_ctl_consumer_channel *channel, |
| 1500 | const char *metadata_str, /* NOT null-terminated */ |
| 1501 | size_t len) /* metadata length */ |
| 1502 | { |
| 1503 | struct lttng_ust_ring_buffer_ctx ctx; |
| 1504 | struct lttng_ust_channel_buffer *lttng_chan_buf = channel->chan; |
| 1505 | struct lttng_ust_ring_buffer_channel *rb_chan = lttng_chan_buf->priv->rb_chan; |
| 1506 | const char *str = metadata_str; |
| 1507 | int ret = 0, waitret; |
| 1508 | size_t reserve_len, pos; |
| 1509 | |
| 1510 | for (pos = 0; pos < len; pos += reserve_len) { |
| 1511 | reserve_len = min_t(size_t, |
| 1512 | lttng_chan_buf->ops->priv->packet_avail_size(lttng_chan_buf), |
| 1513 | len - pos); |
| 1514 | lttng_ust_ring_buffer_ctx_init(&ctx, rb_chan, reserve_len, sizeof(char), NULL); |
| 1515 | /* |
| 1516 | * We don't care about metadata buffer's records lost |
| 1517 | * count, because we always retry here. Report error if |
| 1518 | * we need to bail out after timeout or being |
| 1519 | * interrupted. |
| 1520 | */ |
| 1521 | waitret = wait_cond_interruptible_timeout( |
| 1522 | ({ |
| 1523 | ret = lttng_chan_buf->ops->event_reserve(&ctx); |
| 1524 | ret != -ENOBUFS || !ret; |
| 1525 | }), |
| 1526 | LTTNG_METADATA_TIMEOUT_MSEC); |
| 1527 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { |
| 1528 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", |
| 1529 | waitret == -EINTR ? "interrupted" : |
| 1530 | (ret == -ENOBUFS ? "timeout" : "I/O error")); |
| 1531 | if (waitret == -EINTR) |
| 1532 | ret = waitret; |
| 1533 | goto end; |
| 1534 | } |
| 1535 | lttng_chan_buf->ops->event_write(&ctx, &str[pos], reserve_len, 1); |
| 1536 | lttng_chan_buf->ops->event_commit(&ctx); |
| 1537 | } |
| 1538 | end: |
| 1539 | return ret; |
| 1540 | } |
| 1541 | |
| 1542 | /* |
| 1543 | * Write at most one packet in the channel. |
| 1544 | * Returns the number of bytes written on success, < 0 on error. |
| 1545 | */ |
| 1546 | ssize_t lttng_ust_ctl_write_one_packet_to_channel( |
| 1547 | struct lttng_ust_ctl_consumer_channel *channel, |
| 1548 | const char *metadata_str, /* NOT null-terminated */ |
| 1549 | size_t len) /* metadata length */ |
| 1550 | { |
| 1551 | struct lttng_ust_ring_buffer_ctx ctx; |
| 1552 | struct lttng_ust_channel_buffer *lttng_chan_buf = channel->chan; |
| 1553 | struct lttng_ust_ring_buffer_channel *rb_chan = lttng_chan_buf->priv->rb_chan; |
| 1554 | const char *str = metadata_str; |
| 1555 | ssize_t reserve_len; |
| 1556 | int ret; |
| 1557 | |
| 1558 | reserve_len = min_t(ssize_t, |
| 1559 | lttng_chan_buf->ops->priv->packet_avail_size(lttng_chan_buf), |
| 1560 | len); |
| 1561 | lttng_ust_ring_buffer_ctx_init(&ctx, rb_chan, reserve_len, sizeof(char), NULL); |
| 1562 | ret = lttng_chan_buf->ops->event_reserve(&ctx); |
| 1563 | if (ret != 0) { |
| 1564 | DBG("LTTng: event reservation failed"); |
| 1565 | assert(ret < 0); |
| 1566 | reserve_len = ret; |
| 1567 | goto end; |
| 1568 | } |
| 1569 | lttng_chan_buf->ops->event_write(&ctx, str, reserve_len, 1); |
| 1570 | lttng_chan_buf->ops->event_commit(&ctx); |
| 1571 | |
| 1572 | end: |
| 1573 | return reserve_len; |
| 1574 | } |
| 1575 | |
| 1576 | int lttng_ust_ctl_channel_close_wait_fd(struct lttng_ust_ctl_consumer_channel *consumer_chan) |
| 1577 | { |
| 1578 | struct lttng_ust_ring_buffer_channel *chan; |
| 1579 | int ret; |
| 1580 | |
| 1581 | chan = consumer_chan->chan->priv->rb_chan; |
| 1582 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
| 1583 | chan, chan->handle); |
| 1584 | if (!ret) |
| 1585 | consumer_chan->wait_fd = -1; |
| 1586 | return ret; |
| 1587 | } |
| 1588 | |
| 1589 | int lttng_ust_ctl_channel_close_wakeup_fd(struct lttng_ust_ctl_consumer_channel *consumer_chan) |
| 1590 | { |
| 1591 | struct lttng_ust_ring_buffer_channel *chan; |
| 1592 | int ret; |
| 1593 | |
| 1594 | chan = consumer_chan->chan->priv->rb_chan; |
| 1595 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
| 1596 | chan, chan->handle); |
| 1597 | if (!ret) |
| 1598 | consumer_chan->wakeup_fd = -1; |
| 1599 | return ret; |
| 1600 | } |
| 1601 | |
| 1602 | int lttng_ust_ctl_stream_close_wait_fd(struct lttng_ust_ctl_consumer_stream *stream) |
| 1603 | { |
| 1604 | struct lttng_ust_ring_buffer_channel *chan; |
| 1605 | |
| 1606 | chan = stream->chan->chan->priv->rb_chan; |
| 1607 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
| 1608 | chan, chan->handle, stream->cpu); |
| 1609 | } |
| 1610 | |
| 1611 | int lttng_ust_ctl_stream_close_wakeup_fd(struct lttng_ust_ctl_consumer_stream *stream) |
| 1612 | { |
| 1613 | struct lttng_ust_ring_buffer_channel *chan; |
| 1614 | |
| 1615 | chan = stream->chan->chan->priv->rb_chan; |
| 1616 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
| 1617 | chan, chan->handle, stream->cpu); |
| 1618 | } |
| 1619 | |
| 1620 | struct lttng_ust_ctl_consumer_stream * |
| 1621 | lttng_ust_ctl_create_stream(struct lttng_ust_ctl_consumer_channel *channel, |
| 1622 | int cpu) |
| 1623 | { |
| 1624 | struct lttng_ust_ctl_consumer_stream *stream; |
| 1625 | struct lttng_ust_shm_handle *handle; |
| 1626 | struct lttng_ust_ring_buffer_channel *rb_chan; |
| 1627 | int shm_fd, wait_fd, wakeup_fd; |
| 1628 | uint64_t memory_map_size; |
| 1629 | void *memory_map_addr; |
| 1630 | struct lttng_ust_ring_buffer *buf; |
| 1631 | int ret; |
| 1632 | |
| 1633 | if (!channel) |
| 1634 | return NULL; |
| 1635 | rb_chan = channel->chan->priv->rb_chan; |
| 1636 | handle = rb_chan->handle; |
| 1637 | if (!handle) |
| 1638 | return NULL; |
| 1639 | |
| 1640 | buf = channel_get_ring_buffer(&rb_chan->backend.config, |
| 1641 | rb_chan, cpu, handle, &shm_fd, &wait_fd, |
| 1642 | &wakeup_fd, &memory_map_size, &memory_map_addr); |
| 1643 | if (!buf) |
| 1644 | return NULL; |
| 1645 | ret = lib_ring_buffer_open_read(buf, handle); |
| 1646 | if (ret) |
| 1647 | return NULL; |
| 1648 | |
| 1649 | stream = zmalloc(sizeof(*stream)); |
| 1650 | if (!stream) |
| 1651 | goto alloc_error; |
| 1652 | stream->buf = buf; |
| 1653 | stream->chan = channel; |
| 1654 | stream->shm_fd = shm_fd; |
| 1655 | stream->wait_fd = wait_fd; |
| 1656 | stream->wakeup_fd = wakeup_fd; |
| 1657 | stream->memory_map_size = memory_map_size; |
| 1658 | stream->memory_map_addr = memory_map_addr; |
| 1659 | stream->cpu = cpu; |
| 1660 | return stream; |
| 1661 | |
| 1662 | alloc_error: |
| 1663 | return NULL; |
| 1664 | } |
| 1665 | |
| 1666 | void lttng_ust_ctl_destroy_stream(struct lttng_ust_ctl_consumer_stream *stream) |
| 1667 | { |
| 1668 | struct lttng_ust_ring_buffer *buf; |
| 1669 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1670 | |
| 1671 | assert(stream); |
| 1672 | buf = stream->buf; |
| 1673 | consumer_chan = stream->chan; |
| 1674 | (void) lttng_ust_ctl_stream_close_wait_fd(stream); |
| 1675 | (void) lttng_ust_ctl_stream_close_wakeup_fd(stream); |
| 1676 | lib_ring_buffer_release_read(buf, consumer_chan->chan->priv->rb_chan->handle); |
| 1677 | free(stream); |
| 1678 | } |
| 1679 | |
| 1680 | int lttng_ust_ctl_channel_get_wait_fd(struct lttng_ust_ctl_consumer_channel *chan) |
| 1681 | { |
| 1682 | if (!chan) |
| 1683 | return -EINVAL; |
| 1684 | return shm_get_wait_fd(chan->chan->priv->rb_chan->handle, |
| 1685 | &chan->chan->priv->rb_chan->handle->chan._ref); |
| 1686 | } |
| 1687 | |
| 1688 | int lttng_ust_ctl_channel_get_wakeup_fd(struct lttng_ust_ctl_consumer_channel *chan) |
| 1689 | { |
| 1690 | if (!chan) |
| 1691 | return -EINVAL; |
| 1692 | return shm_get_wakeup_fd(chan->chan->priv->rb_chan->handle, |
| 1693 | &chan->chan->priv->rb_chan->handle->chan._ref); |
| 1694 | } |
| 1695 | |
| 1696 | int lttng_ust_ctl_stream_get_wait_fd(struct lttng_ust_ctl_consumer_stream *stream) |
| 1697 | { |
| 1698 | struct lttng_ust_ring_buffer *buf; |
| 1699 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1700 | |
| 1701 | if (!stream) |
| 1702 | return -EINVAL; |
| 1703 | buf = stream->buf; |
| 1704 | consumer_chan = stream->chan; |
| 1705 | return shm_get_wait_fd(consumer_chan->chan->priv->rb_chan->handle, &buf->self._ref); |
| 1706 | } |
| 1707 | |
| 1708 | int lttng_ust_ctl_stream_get_wakeup_fd(struct lttng_ust_ctl_consumer_stream *stream) |
| 1709 | { |
| 1710 | struct lttng_ust_ring_buffer *buf; |
| 1711 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1712 | |
| 1713 | if (!stream) |
| 1714 | return -EINVAL; |
| 1715 | buf = stream->buf; |
| 1716 | consumer_chan = stream->chan; |
| 1717 | return shm_get_wakeup_fd(consumer_chan->chan->priv->rb_chan->handle, &buf->self._ref); |
| 1718 | } |
| 1719 | |
| 1720 | /* For mmap mode, readable without "get" operation */ |
| 1721 | |
| 1722 | void *lttng_ust_ctl_get_mmap_base(struct lttng_ust_ctl_consumer_stream *stream) |
| 1723 | { |
| 1724 | struct lttng_ust_ring_buffer *buf; |
| 1725 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1726 | struct lttng_ust_sigbus_range range; |
| 1727 | void *p; |
| 1728 | |
| 1729 | if (!stream) |
| 1730 | return NULL; |
| 1731 | buf = stream->buf; |
| 1732 | consumer_chan = stream->chan; |
| 1733 | if (sigbus_begin()) |
| 1734 | return NULL; |
| 1735 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 1736 | stream->memory_map_size); |
| 1737 | p = shmp(consumer_chan->chan->priv->rb_chan->handle, buf->backend.memory_map); |
| 1738 | lttng_ust_sigbus_del_range(&range); |
| 1739 | sigbus_end(); |
| 1740 | return p; /* Users of this pointer should check for sigbus. */ |
| 1741 | } |
| 1742 | |
| 1743 | /* returns the length to mmap. */ |
| 1744 | int lttng_ust_ctl_get_mmap_len(struct lttng_ust_ctl_consumer_stream *stream, |
| 1745 | unsigned long *len) |
| 1746 | { |
| 1747 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1748 | unsigned long mmap_buf_len; |
| 1749 | struct lttng_ust_ring_buffer_channel *rb_chan; |
| 1750 | |
| 1751 | if (!stream) |
| 1752 | return -EINVAL; |
| 1753 | consumer_chan = stream->chan; |
| 1754 | rb_chan = consumer_chan->chan->priv->rb_chan; |
| 1755 | if (rb_chan->backend.config.output != RING_BUFFER_MMAP) |
| 1756 | return -EINVAL; |
| 1757 | mmap_buf_len = rb_chan->backend.buf_size; |
| 1758 | if (rb_chan->backend.extra_reader_sb) |
| 1759 | mmap_buf_len += rb_chan->backend.subbuf_size; |
| 1760 | if (mmap_buf_len > INT_MAX) |
| 1761 | return -EFBIG; |
| 1762 | *len = mmap_buf_len; |
| 1763 | return 0; |
| 1764 | } |
| 1765 | |
| 1766 | /* returns the maximum size for sub-buffers. */ |
| 1767 | int lttng_ust_ctl_get_max_subbuf_size(struct lttng_ust_ctl_consumer_stream *stream, |
| 1768 | unsigned long *len) |
| 1769 | { |
| 1770 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1771 | struct lttng_ust_ring_buffer_channel *rb_chan; |
| 1772 | |
| 1773 | if (!stream) |
| 1774 | return -EINVAL; |
| 1775 | consumer_chan = stream->chan; |
| 1776 | rb_chan = consumer_chan->chan->priv->rb_chan; |
| 1777 | *len = rb_chan->backend.subbuf_size; |
| 1778 | return 0; |
| 1779 | } |
| 1780 | |
| 1781 | /* |
| 1782 | * For mmap mode, operate on the current packet (between get/put or |
| 1783 | * get_next/put_next). |
| 1784 | */ |
| 1785 | |
| 1786 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
| 1787 | int lttng_ust_ctl_get_mmap_read_offset(struct lttng_ust_ctl_consumer_stream *stream, |
| 1788 | unsigned long *off) |
| 1789 | { |
| 1790 | struct lttng_ust_ring_buffer_channel *rb_chan; |
| 1791 | unsigned long sb_bindex; |
| 1792 | struct lttng_ust_ring_buffer *buf; |
| 1793 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1794 | struct lttng_ust_ring_buffer_backend_pages_shmp *barray_idx; |
| 1795 | struct lttng_ust_ring_buffer_backend_pages *pages; |
| 1796 | struct lttng_ust_sigbus_range range; |
| 1797 | int ret; |
| 1798 | |
| 1799 | if (!stream) |
| 1800 | return -EINVAL; |
| 1801 | buf = stream->buf; |
| 1802 | consumer_chan = stream->chan; |
| 1803 | rb_chan = consumer_chan->chan->priv->rb_chan; |
| 1804 | if (rb_chan->backend.config.output != RING_BUFFER_MMAP) |
| 1805 | return -EINVAL; |
| 1806 | |
| 1807 | if (sigbus_begin()) |
| 1808 | return -EIO; |
| 1809 | ret = 0; |
| 1810 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 1811 | stream->memory_map_size); |
| 1812 | |
| 1813 | sb_bindex = subbuffer_id_get_index(&rb_chan->backend.config, |
| 1814 | buf->backend.buf_rsb.id); |
| 1815 | barray_idx = shmp_index(rb_chan->handle, buf->backend.array, |
| 1816 | sb_bindex); |
| 1817 | if (!barray_idx) { |
| 1818 | ret = -EINVAL; |
| 1819 | goto end; |
| 1820 | } |
| 1821 | pages = shmp(rb_chan->handle, barray_idx->shmp); |
| 1822 | if (!pages) { |
| 1823 | ret = -EINVAL; |
| 1824 | goto end; |
| 1825 | } |
| 1826 | *off = pages->mmap_offset; |
| 1827 | end: |
| 1828 | lttng_ust_sigbus_del_range(&range); |
| 1829 | sigbus_end(); |
| 1830 | return ret; |
| 1831 | } |
| 1832 | |
| 1833 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
| 1834 | int lttng_ust_ctl_get_subbuf_size(struct lttng_ust_ctl_consumer_stream *stream, |
| 1835 | unsigned long *len) |
| 1836 | { |
| 1837 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1838 | struct lttng_ust_ring_buffer_channel *rb_chan; |
| 1839 | struct lttng_ust_ring_buffer *buf; |
| 1840 | struct lttng_ust_sigbus_range range; |
| 1841 | |
| 1842 | if (!stream) |
| 1843 | return -EINVAL; |
| 1844 | |
| 1845 | buf = stream->buf; |
| 1846 | consumer_chan = stream->chan; |
| 1847 | rb_chan = consumer_chan->chan->priv->rb_chan; |
| 1848 | if (sigbus_begin()) |
| 1849 | return -EIO; |
| 1850 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 1851 | stream->memory_map_size); |
| 1852 | *len = lib_ring_buffer_get_read_data_size(&rb_chan->backend.config, buf, |
| 1853 | rb_chan->handle); |
| 1854 | lttng_ust_sigbus_del_range(&range); |
| 1855 | sigbus_end(); |
| 1856 | return 0; |
| 1857 | } |
| 1858 | |
| 1859 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
| 1860 | int lttng_ust_ctl_get_padded_subbuf_size(struct lttng_ust_ctl_consumer_stream *stream, |
| 1861 | unsigned long *len) |
| 1862 | { |
| 1863 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1864 | struct lttng_ust_ring_buffer_channel *rb_chan; |
| 1865 | struct lttng_ust_ring_buffer *buf; |
| 1866 | struct lttng_ust_sigbus_range range; |
| 1867 | |
| 1868 | if (!stream) |
| 1869 | return -EINVAL; |
| 1870 | buf = stream->buf; |
| 1871 | consumer_chan = stream->chan; |
| 1872 | rb_chan = consumer_chan->chan->priv->rb_chan; |
| 1873 | if (sigbus_begin()) |
| 1874 | return -EIO; |
| 1875 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 1876 | stream->memory_map_size); |
| 1877 | *len = lib_ring_buffer_get_read_data_size(&rb_chan->backend.config, buf, |
| 1878 | rb_chan->handle); |
| 1879 | *len = LTTNG_UST_PAGE_ALIGN(*len); |
| 1880 | lttng_ust_sigbus_del_range(&range); |
| 1881 | sigbus_end(); |
| 1882 | return 0; |
| 1883 | } |
| 1884 | |
| 1885 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
| 1886 | int lttng_ust_ctl_get_next_subbuf(struct lttng_ust_ctl_consumer_stream *stream) |
| 1887 | { |
| 1888 | struct lttng_ust_ring_buffer *buf; |
| 1889 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1890 | struct lttng_ust_sigbus_range range; |
| 1891 | int ret; |
| 1892 | |
| 1893 | if (!stream) |
| 1894 | return -EINVAL; |
| 1895 | buf = stream->buf; |
| 1896 | consumer_chan = stream->chan; |
| 1897 | if (sigbus_begin()) |
| 1898 | return -EIO; |
| 1899 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 1900 | stream->memory_map_size); |
| 1901 | ret = lib_ring_buffer_get_next_subbuf(buf, |
| 1902 | consumer_chan->chan->priv->rb_chan->handle); |
| 1903 | lttng_ust_sigbus_del_range(&range); |
| 1904 | sigbus_end(); |
| 1905 | return ret; |
| 1906 | } |
| 1907 | |
| 1908 | /* Release exclusive sub-buffer access, move consumer forward. */ |
| 1909 | int lttng_ust_ctl_put_next_subbuf(struct lttng_ust_ctl_consumer_stream *stream) |
| 1910 | { |
| 1911 | struct lttng_ust_ring_buffer *buf; |
| 1912 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1913 | struct lttng_ust_sigbus_range range; |
| 1914 | |
| 1915 | if (!stream) |
| 1916 | return -EINVAL; |
| 1917 | buf = stream->buf; |
| 1918 | consumer_chan = stream->chan; |
| 1919 | if (sigbus_begin()) |
| 1920 | return -EIO; |
| 1921 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 1922 | stream->memory_map_size); |
| 1923 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->priv->rb_chan->handle); |
| 1924 | lttng_ust_sigbus_del_range(&range); |
| 1925 | sigbus_end(); |
| 1926 | return 0; |
| 1927 | } |
| 1928 | |
| 1929 | /* snapshot */ |
| 1930 | |
| 1931 | /* Get a snapshot of the current ring buffer producer and consumer positions */ |
| 1932 | int lttng_ust_ctl_snapshot(struct lttng_ust_ctl_consumer_stream *stream) |
| 1933 | { |
| 1934 | struct lttng_ust_ring_buffer *buf; |
| 1935 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1936 | struct lttng_ust_sigbus_range range; |
| 1937 | int ret; |
| 1938 | |
| 1939 | if (!stream) |
| 1940 | return -EINVAL; |
| 1941 | buf = stream->buf; |
| 1942 | consumer_chan = stream->chan; |
| 1943 | if (sigbus_begin()) |
| 1944 | return -EIO; |
| 1945 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 1946 | stream->memory_map_size); |
| 1947 | ret = lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, |
| 1948 | &buf->prod_snapshot, consumer_chan->chan->priv->rb_chan->handle); |
| 1949 | lttng_ust_sigbus_del_range(&range); |
| 1950 | sigbus_end(); |
| 1951 | return ret; |
| 1952 | } |
| 1953 | |
| 1954 | /* |
| 1955 | * Get a snapshot of the current ring buffer producer and consumer positions |
| 1956 | * even if the consumed and produced positions are contained within the same |
| 1957 | * subbuffer. |
| 1958 | */ |
| 1959 | int lttng_ust_ctl_snapshot_sample_positions(struct lttng_ust_ctl_consumer_stream *stream) |
| 1960 | { |
| 1961 | struct lttng_ust_ring_buffer *buf; |
| 1962 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 1963 | struct lttng_ust_sigbus_range range; |
| 1964 | int ret; |
| 1965 | |
| 1966 | if (!stream) |
| 1967 | return -EINVAL; |
| 1968 | buf = stream->buf; |
| 1969 | consumer_chan = stream->chan; |
| 1970 | if (sigbus_begin()) |
| 1971 | return -EIO; |
| 1972 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 1973 | stream->memory_map_size); |
| 1974 | ret = lib_ring_buffer_snapshot_sample_positions(buf, |
| 1975 | &buf->cons_snapshot, &buf->prod_snapshot, |
| 1976 | consumer_chan->chan->priv->rb_chan->handle); |
| 1977 | lttng_ust_sigbus_del_range(&range); |
| 1978 | sigbus_end(); |
| 1979 | return ret; |
| 1980 | } |
| 1981 | |
| 1982 | /* Get the consumer position (iteration start) */ |
| 1983 | int lttng_ust_ctl_snapshot_get_consumed(struct lttng_ust_ctl_consumer_stream *stream, |
| 1984 | unsigned long *pos) |
| 1985 | { |
| 1986 | struct lttng_ust_ring_buffer *buf; |
| 1987 | |
| 1988 | if (!stream) |
| 1989 | return -EINVAL; |
| 1990 | buf = stream->buf; |
| 1991 | *pos = buf->cons_snapshot; |
| 1992 | return 0; |
| 1993 | } |
| 1994 | |
| 1995 | /* Get the producer position (iteration end) */ |
| 1996 | int lttng_ust_ctl_snapshot_get_produced(struct lttng_ust_ctl_consumer_stream *stream, |
| 1997 | unsigned long *pos) |
| 1998 | { |
| 1999 | struct lttng_ust_ring_buffer *buf; |
| 2000 | |
| 2001 | if (!stream) |
| 2002 | return -EINVAL; |
| 2003 | buf = stream->buf; |
| 2004 | *pos = buf->prod_snapshot; |
| 2005 | return 0; |
| 2006 | } |
| 2007 | |
| 2008 | /* Get exclusive read access to the specified sub-buffer position */ |
| 2009 | int lttng_ust_ctl_get_subbuf(struct lttng_ust_ctl_consumer_stream *stream, |
| 2010 | unsigned long *pos) |
| 2011 | { |
| 2012 | struct lttng_ust_ring_buffer *buf; |
| 2013 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 2014 | struct lttng_ust_sigbus_range range; |
| 2015 | int ret; |
| 2016 | |
| 2017 | if (!stream) |
| 2018 | return -EINVAL; |
| 2019 | buf = stream->buf; |
| 2020 | consumer_chan = stream->chan; |
| 2021 | if (sigbus_begin()) |
| 2022 | return -EIO; |
| 2023 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2024 | stream->memory_map_size); |
| 2025 | ret = lib_ring_buffer_get_subbuf(buf, *pos, |
| 2026 | consumer_chan->chan->priv->rb_chan->handle); |
| 2027 | lttng_ust_sigbus_del_range(&range); |
| 2028 | sigbus_end(); |
| 2029 | return ret; |
| 2030 | } |
| 2031 | |
| 2032 | /* Release exclusive sub-buffer access */ |
| 2033 | int lttng_ust_ctl_put_subbuf(struct lttng_ust_ctl_consumer_stream *stream) |
| 2034 | { |
| 2035 | struct lttng_ust_ring_buffer *buf; |
| 2036 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 2037 | struct lttng_ust_sigbus_range range; |
| 2038 | |
| 2039 | if (!stream) |
| 2040 | return -EINVAL; |
| 2041 | buf = stream->buf; |
| 2042 | consumer_chan = stream->chan; |
| 2043 | if (sigbus_begin()) |
| 2044 | return -EIO; |
| 2045 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2046 | stream->memory_map_size); |
| 2047 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->priv->rb_chan->handle); |
| 2048 | lttng_ust_sigbus_del_range(&range); |
| 2049 | sigbus_end(); |
| 2050 | return 0; |
| 2051 | } |
| 2052 | |
| 2053 | int lttng_ust_ctl_flush_buffer(struct lttng_ust_ctl_consumer_stream *stream, |
| 2054 | int producer_active) |
| 2055 | { |
| 2056 | struct lttng_ust_ring_buffer *buf; |
| 2057 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 2058 | struct lttng_ust_sigbus_range range; |
| 2059 | |
| 2060 | assert(stream); |
| 2061 | buf = stream->buf; |
| 2062 | consumer_chan = stream->chan; |
| 2063 | if (sigbus_begin()) |
| 2064 | return -EIO; |
| 2065 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2066 | stream->memory_map_size); |
| 2067 | lib_ring_buffer_switch_slow(buf, |
| 2068 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, |
| 2069 | consumer_chan->chan->priv->rb_chan->handle); |
| 2070 | lttng_ust_sigbus_del_range(&range); |
| 2071 | sigbus_end(); |
| 2072 | return 0; |
| 2073 | } |
| 2074 | |
| 2075 | int lttng_ust_ctl_clear_buffer(struct lttng_ust_ctl_consumer_stream *stream) |
| 2076 | { |
| 2077 | struct lttng_ust_ring_buffer *buf; |
| 2078 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
| 2079 | struct lttng_ust_sigbus_range range; |
| 2080 | |
| 2081 | assert(stream); |
| 2082 | buf = stream->buf; |
| 2083 | consumer_chan = stream->chan; |
| 2084 | if (sigbus_begin()) |
| 2085 | return -EIO; |
| 2086 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2087 | stream->memory_map_size); |
| 2088 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, |
| 2089 | consumer_chan->chan->priv->rb_chan->handle); |
| 2090 | lib_ring_buffer_clear_reader(buf, consumer_chan->chan->priv->rb_chan->handle); |
| 2091 | lttng_ust_sigbus_del_range(&range); |
| 2092 | sigbus_end(); |
| 2093 | return 0; |
| 2094 | } |
| 2095 | |
| 2096 | static |
| 2097 | struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb( |
| 2098 | struct lttng_ust_ring_buffer *buf __attribute__((unused)), |
| 2099 | struct lttng_ust_ring_buffer_channel *chan) |
| 2100 | { |
| 2101 | const struct lttng_ust_ring_buffer_config *config; |
| 2102 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2103 | |
| 2104 | config = &chan->backend.config; |
| 2105 | if (!config->cb_ptr) |
| 2106 | return NULL; |
| 2107 | client_cb = caa_container_of(config->cb_ptr, |
| 2108 | struct lttng_ust_client_lib_ring_buffer_client_cb, |
| 2109 | parent); |
| 2110 | return client_cb; |
| 2111 | } |
| 2112 | |
| 2113 | int lttng_ust_ctl_get_timestamp_begin(struct lttng_ust_ctl_consumer_stream *stream, |
| 2114 | uint64_t *timestamp_begin) |
| 2115 | { |
| 2116 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2117 | struct lttng_ust_ring_buffer_channel *chan; |
| 2118 | struct lttng_ust_ring_buffer *buf; |
| 2119 | struct lttng_ust_sigbus_range range; |
| 2120 | int ret; |
| 2121 | |
| 2122 | if (!stream || !timestamp_begin) |
| 2123 | return -EINVAL; |
| 2124 | buf = stream->buf; |
| 2125 | chan = stream->chan->chan->priv->rb_chan; |
| 2126 | client_cb = get_client_cb(buf, chan); |
| 2127 | if (!client_cb) |
| 2128 | return -ENOSYS; |
| 2129 | if (sigbus_begin()) |
| 2130 | return -EIO; |
| 2131 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2132 | stream->memory_map_size); |
| 2133 | ret = client_cb->timestamp_begin(buf, chan, timestamp_begin); |
| 2134 | lttng_ust_sigbus_del_range(&range); |
| 2135 | sigbus_end(); |
| 2136 | return ret; |
| 2137 | } |
| 2138 | |
| 2139 | int lttng_ust_ctl_get_timestamp_end(struct lttng_ust_ctl_consumer_stream *stream, |
| 2140 | uint64_t *timestamp_end) |
| 2141 | { |
| 2142 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2143 | struct lttng_ust_ring_buffer_channel *chan; |
| 2144 | struct lttng_ust_ring_buffer *buf; |
| 2145 | struct lttng_ust_sigbus_range range; |
| 2146 | int ret; |
| 2147 | |
| 2148 | if (!stream || !timestamp_end) |
| 2149 | return -EINVAL; |
| 2150 | buf = stream->buf; |
| 2151 | chan = stream->chan->chan->priv->rb_chan; |
| 2152 | client_cb = get_client_cb(buf, chan); |
| 2153 | if (!client_cb) |
| 2154 | return -ENOSYS; |
| 2155 | if (sigbus_begin()) |
| 2156 | return -EIO; |
| 2157 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2158 | stream->memory_map_size); |
| 2159 | ret = client_cb->timestamp_end(buf, chan, timestamp_end); |
| 2160 | lttng_ust_sigbus_del_range(&range); |
| 2161 | sigbus_end(); |
| 2162 | return ret; |
| 2163 | } |
| 2164 | |
| 2165 | int lttng_ust_ctl_get_events_discarded(struct lttng_ust_ctl_consumer_stream *stream, |
| 2166 | uint64_t *events_discarded) |
| 2167 | { |
| 2168 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2169 | struct lttng_ust_ring_buffer_channel *chan; |
| 2170 | struct lttng_ust_ring_buffer *buf; |
| 2171 | struct lttng_ust_sigbus_range range; |
| 2172 | int ret; |
| 2173 | |
| 2174 | if (!stream || !events_discarded) |
| 2175 | return -EINVAL; |
| 2176 | buf = stream->buf; |
| 2177 | chan = stream->chan->chan->priv->rb_chan; |
| 2178 | client_cb = get_client_cb(buf, chan); |
| 2179 | if (!client_cb) |
| 2180 | return -ENOSYS; |
| 2181 | if (sigbus_begin()) |
| 2182 | return -EIO; |
| 2183 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2184 | stream->memory_map_size); |
| 2185 | ret = client_cb->events_discarded(buf, chan, events_discarded); |
| 2186 | lttng_ust_sigbus_del_range(&range); |
| 2187 | sigbus_end(); |
| 2188 | return ret; |
| 2189 | } |
| 2190 | |
| 2191 | int lttng_ust_ctl_get_content_size(struct lttng_ust_ctl_consumer_stream *stream, |
| 2192 | uint64_t *content_size) |
| 2193 | { |
| 2194 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2195 | struct lttng_ust_ring_buffer_channel *chan; |
| 2196 | struct lttng_ust_ring_buffer *buf; |
| 2197 | struct lttng_ust_sigbus_range range; |
| 2198 | int ret; |
| 2199 | |
| 2200 | if (!stream || !content_size) |
| 2201 | return -EINVAL; |
| 2202 | buf = stream->buf; |
| 2203 | chan = stream->chan->chan->priv->rb_chan; |
| 2204 | client_cb = get_client_cb(buf, chan); |
| 2205 | if (!client_cb) |
| 2206 | return -ENOSYS; |
| 2207 | if (sigbus_begin()) |
| 2208 | return -EIO; |
| 2209 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2210 | stream->memory_map_size); |
| 2211 | ret = client_cb->content_size(buf, chan, content_size); |
| 2212 | lttng_ust_sigbus_del_range(&range); |
| 2213 | sigbus_end(); |
| 2214 | return ret; |
| 2215 | } |
| 2216 | |
| 2217 | int lttng_ust_ctl_get_packet_size(struct lttng_ust_ctl_consumer_stream *stream, |
| 2218 | uint64_t *packet_size) |
| 2219 | { |
| 2220 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2221 | struct lttng_ust_ring_buffer_channel *chan; |
| 2222 | struct lttng_ust_ring_buffer *buf; |
| 2223 | struct lttng_ust_sigbus_range range; |
| 2224 | int ret; |
| 2225 | |
| 2226 | if (!stream || !packet_size) |
| 2227 | return -EINVAL; |
| 2228 | buf = stream->buf; |
| 2229 | chan = stream->chan->chan->priv->rb_chan; |
| 2230 | client_cb = get_client_cb(buf, chan); |
| 2231 | if (!client_cb) |
| 2232 | return -ENOSYS; |
| 2233 | if (sigbus_begin()) |
| 2234 | return -EIO; |
| 2235 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2236 | stream->memory_map_size); |
| 2237 | ret = client_cb->packet_size(buf, chan, packet_size); |
| 2238 | lttng_ust_sigbus_del_range(&range); |
| 2239 | sigbus_end(); |
| 2240 | return ret; |
| 2241 | } |
| 2242 | |
| 2243 | int lttng_ust_ctl_get_stream_id(struct lttng_ust_ctl_consumer_stream *stream, |
| 2244 | uint64_t *stream_id) |
| 2245 | { |
| 2246 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2247 | struct lttng_ust_ring_buffer_channel *chan; |
| 2248 | struct lttng_ust_ring_buffer *buf; |
| 2249 | struct lttng_ust_sigbus_range range; |
| 2250 | int ret; |
| 2251 | |
| 2252 | if (!stream || !stream_id) |
| 2253 | return -EINVAL; |
| 2254 | buf = stream->buf; |
| 2255 | chan = stream->chan->chan->priv->rb_chan; |
| 2256 | client_cb = get_client_cb(buf, chan); |
| 2257 | if (!client_cb) |
| 2258 | return -ENOSYS; |
| 2259 | if (sigbus_begin()) |
| 2260 | return -EIO; |
| 2261 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2262 | stream->memory_map_size); |
| 2263 | ret = client_cb->stream_id(buf, chan, stream_id); |
| 2264 | lttng_ust_sigbus_del_range(&range); |
| 2265 | sigbus_end(); |
| 2266 | return ret; |
| 2267 | } |
| 2268 | |
| 2269 | int lttng_ust_ctl_get_current_timestamp(struct lttng_ust_ctl_consumer_stream *stream, |
| 2270 | uint64_t *ts) |
| 2271 | { |
| 2272 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2273 | struct lttng_ust_ring_buffer_channel *chan; |
| 2274 | struct lttng_ust_ring_buffer *buf; |
| 2275 | struct lttng_ust_sigbus_range range; |
| 2276 | int ret; |
| 2277 | |
| 2278 | if (!stream || !ts) |
| 2279 | return -EINVAL; |
| 2280 | buf = stream->buf; |
| 2281 | chan = stream->chan->chan->priv->rb_chan; |
| 2282 | client_cb = get_client_cb(buf, chan); |
| 2283 | if (!client_cb || !client_cb->current_timestamp) |
| 2284 | return -ENOSYS; |
| 2285 | if (sigbus_begin()) |
| 2286 | return -EIO; |
| 2287 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2288 | stream->memory_map_size); |
| 2289 | ret = client_cb->current_timestamp(buf, chan, ts); |
| 2290 | lttng_ust_sigbus_del_range(&range); |
| 2291 | sigbus_end(); |
| 2292 | return ret; |
| 2293 | } |
| 2294 | |
| 2295 | int lttng_ust_ctl_get_sequence_number(struct lttng_ust_ctl_consumer_stream *stream, |
| 2296 | uint64_t *seq) |
| 2297 | { |
| 2298 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2299 | struct lttng_ust_ring_buffer_channel *chan; |
| 2300 | struct lttng_ust_ring_buffer *buf; |
| 2301 | struct lttng_ust_sigbus_range range; |
| 2302 | int ret; |
| 2303 | |
| 2304 | if (!stream || !seq) |
| 2305 | return -EINVAL; |
| 2306 | buf = stream->buf; |
| 2307 | chan = stream->chan->chan->priv->rb_chan; |
| 2308 | client_cb = get_client_cb(buf, chan); |
| 2309 | if (!client_cb || !client_cb->sequence_number) |
| 2310 | return -ENOSYS; |
| 2311 | if (sigbus_begin()) |
| 2312 | return -EIO; |
| 2313 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2314 | stream->memory_map_size); |
| 2315 | ret = client_cb->sequence_number(buf, chan, seq); |
| 2316 | lttng_ust_sigbus_del_range(&range); |
| 2317 | sigbus_end(); |
| 2318 | return ret; |
| 2319 | } |
| 2320 | |
| 2321 | int lttng_ust_ctl_get_instance_id(struct lttng_ust_ctl_consumer_stream *stream, |
| 2322 | uint64_t *id) |
| 2323 | { |
| 2324 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
| 2325 | struct lttng_ust_ring_buffer_channel *chan; |
| 2326 | struct lttng_ust_ring_buffer *buf; |
| 2327 | struct lttng_ust_sigbus_range range; |
| 2328 | int ret; |
| 2329 | |
| 2330 | if (!stream || !id) |
| 2331 | return -EINVAL; |
| 2332 | buf = stream->buf; |
| 2333 | chan = stream->chan->chan->priv->rb_chan; |
| 2334 | client_cb = get_client_cb(buf, chan); |
| 2335 | if (!client_cb) |
| 2336 | return -ENOSYS; |
| 2337 | if (sigbus_begin()) |
| 2338 | return -EIO; |
| 2339 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, |
| 2340 | stream->memory_map_size); |
| 2341 | ret = client_cb->instance_id(buf, chan, id); |
| 2342 | lttng_ust_sigbus_del_range(&range); |
| 2343 | sigbus_end(); |
| 2344 | return ret; |
| 2345 | } |
| 2346 | |
| 2347 | #ifdef HAVE_LINUX_PERF_EVENT_H |
| 2348 | |
| 2349 | int lttng_ust_ctl_has_perf_counters(void) |
| 2350 | { |
| 2351 | return 1; |
| 2352 | } |
| 2353 | |
| 2354 | #else |
| 2355 | |
| 2356 | int lttng_ust_ctl_has_perf_counters(void) |
| 2357 | { |
| 2358 | return 0; |
| 2359 | } |
| 2360 | |
| 2361 | #endif |
| 2362 | |
| 2363 | #ifdef __linux__ |
| 2364 | /* |
| 2365 | * Override application pid/uid/gid with unix socket credentials. If |
| 2366 | * the application announced a pid matching our view, it means it is |
| 2367 | * within the same pid namespace, so expose the ppid provided by the |
| 2368 | * application. |
| 2369 | */ |
| 2370 | static |
| 2371 | int get_cred(int sock, |
| 2372 | const struct lttng_ust_ctl_reg_msg *reg_msg, |
| 2373 | uint32_t *pid, |
| 2374 | uint32_t *ppid, |
| 2375 | uint32_t *uid, |
| 2376 | uint32_t *gid) |
| 2377 | { |
| 2378 | struct ucred ucred; |
| 2379 | socklen_t ucred_len = sizeof(struct ucred); |
| 2380 | int ret; |
| 2381 | |
| 2382 | ret = getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &ucred, &ucred_len); |
| 2383 | if (ret) { |
| 2384 | return -LTTNG_UST_ERR_PEERCRED; |
| 2385 | } |
| 2386 | DBG("Unix socket peercred [ pid: %u, uid: %u, gid: %u ], " |
| 2387 | "application registered claiming [ pid: %u, ppid: %u, uid: %u, gid: %u ]", |
| 2388 | ucred.pid, ucred.uid, ucred.gid, |
| 2389 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); |
| 2390 | if (!ucred.pid) { |
| 2391 | ERR("Unix socket credential pid=0. Refusing application in distinct, non-nested pid namespace."); |
| 2392 | return -LTTNG_UST_ERR_PEERCRED_PID; |
| 2393 | } |
| 2394 | *pid = ucred.pid; |
| 2395 | *uid = ucred.uid; |
| 2396 | *gid = ucred.gid; |
| 2397 | if (ucred.pid == reg_msg->pid) { |
| 2398 | *ppid = reg_msg->ppid; |
| 2399 | } else { |
| 2400 | *ppid = 0; |
| 2401 | } |
| 2402 | return 0; |
| 2403 | } |
| 2404 | #elif defined(__FreeBSD__) |
| 2405 | #include <sys/ucred.h> |
| 2406 | #include <sys/un.h> |
| 2407 | |
| 2408 | /* |
| 2409 | * Override application uid/gid with unix socket credentials. Use the |
| 2410 | * first group of the cr_groups. |
| 2411 | */ |
| 2412 | static |
| 2413 | int get_cred(int sock, |
| 2414 | const struct lttng_ust_ctl_reg_msg *reg_msg, |
| 2415 | uint32_t *pid, |
| 2416 | uint32_t *ppid, |
| 2417 | uint32_t *uid, |
| 2418 | uint32_t *gid) |
| 2419 | { |
| 2420 | struct xucred xucred; |
| 2421 | socklen_t xucred_len = sizeof(struct xucred); |
| 2422 | int ret; |
| 2423 | |
| 2424 | ret = getsockopt(sock, SOL_LOCAL, LOCAL_PEERCRED, &xucred, &xucred_len); |
| 2425 | if (ret) { |
| 2426 | return -LTTNG_UST_ERR_PEERCRED; |
| 2427 | } |
| 2428 | if (xucred.cr_version != XUCRED_VERSION || xucred.cr_ngroups < 1) { |
| 2429 | return -LTTNG_UST_ERR_PEERCRED; |
| 2430 | } |
| 2431 | DBG("Unix socket peercred [ pid: %u, uid: %u, gid: %u ], " |
| 2432 | "application registered claiming [ pid: %u, ppid: %u, uid: %u, gid: %u ]", |
| 2433 | xucred.cr_pid, xucred.cr_uid, xucred.cr_groups[0], |
| 2434 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); |
| 2435 | *pid = xucred.cr_pid; |
| 2436 | *uid = xucred.cr_uid; |
| 2437 | *gid = xucred.cr_groups[0]; |
| 2438 | if (xucred.cr_pid == reg_msg->pid) { |
| 2439 | *ppid = reg_msg->ppid; |
| 2440 | } else { |
| 2441 | *ppid = 0; |
| 2442 | } |
| 2443 | return 0; |
| 2444 | } |
| 2445 | #else |
| 2446 | #warning "Using insecure fallback: trusting user id provided by registered applications. Please consider implementing use of unix socket credentials on your platform." |
| 2447 | static |
| 2448 | int get_cred(int sock, |
| 2449 | const struct lttng_ust_ctl_reg_msg *reg_msg, |
| 2450 | uint32_t *pid, |
| 2451 | uint32_t *ppid, |
| 2452 | uint32_t *uid, |
| 2453 | uint32_t *gid) |
| 2454 | { |
| 2455 | DBG("Application registered claiming [ pid: %u, ppid: %d, uid: %u, gid: %u ]", |
| 2456 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); |
| 2457 | *pid = reg_msg->pid; |
| 2458 | *ppid = reg_msg->ppid; |
| 2459 | *uid = reg_msg->uid; |
| 2460 | *gid = reg_msg->gid; |
| 2461 | return 0; |
| 2462 | } |
| 2463 | #endif |
| 2464 | |
| 2465 | /* |
| 2466 | * Returns 0 on success, negative error value on error. |
| 2467 | */ |
| 2468 | int lttng_ust_ctl_recv_reg_msg(int sock, |
| 2469 | enum lttng_ust_ctl_socket_type *type, |
| 2470 | uint32_t *major, |
| 2471 | uint32_t *minor, |
| 2472 | uint32_t *pid, |
| 2473 | uint32_t *ppid, |
| 2474 | uint32_t *uid, |
| 2475 | uint32_t *gid, |
| 2476 | uint32_t *bits_per_long, |
| 2477 | uint32_t *uint8_t_alignment, |
| 2478 | uint32_t *uint16_t_alignment, |
| 2479 | uint32_t *uint32_t_alignment, |
| 2480 | uint32_t *uint64_t_alignment, |
| 2481 | uint32_t *long_alignment, |
| 2482 | int *byte_order, |
| 2483 | char *name) |
| 2484 | { |
| 2485 | ssize_t len; |
| 2486 | struct lttng_ust_ctl_reg_msg reg_msg; |
| 2487 | |
| 2488 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); |
| 2489 | if (len > 0 && len != sizeof(reg_msg)) |
| 2490 | return -EIO; |
| 2491 | if (len == 0) |
| 2492 | return -EPIPE; |
| 2493 | if (len < 0) |
| 2494 | return len; |
| 2495 | |
| 2496 | if (reg_msg.magic == LTTNG_UST_ABI_COMM_MAGIC) { |
| 2497 | *byte_order = LTTNG_UST_BYTE_ORDER == LTTNG_UST_BIG_ENDIAN ? |
| 2498 | LTTNG_UST_BIG_ENDIAN : LTTNG_UST_LITTLE_ENDIAN; |
| 2499 | } else if (reg_msg.magic == lttng_ust_bswap_32(LTTNG_UST_ABI_COMM_MAGIC)) { |
| 2500 | *byte_order = LTTNG_UST_BYTE_ORDER == LTTNG_UST_BIG_ENDIAN ? |
| 2501 | LTTNG_UST_LITTLE_ENDIAN : LTTNG_UST_BIG_ENDIAN; |
| 2502 | } else { |
| 2503 | return -LTTNG_UST_ERR_INVAL_MAGIC; |
| 2504 | } |
| 2505 | switch (reg_msg.socket_type) { |
| 2506 | case 0: *type = LTTNG_UST_CTL_SOCKET_CMD; |
| 2507 | break; |
| 2508 | case 1: *type = LTTNG_UST_CTL_SOCKET_NOTIFY; |
| 2509 | break; |
| 2510 | default: |
| 2511 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; |
| 2512 | } |
| 2513 | *major = reg_msg.major; |
| 2514 | *minor = reg_msg.minor; |
| 2515 | *bits_per_long = reg_msg.bits_per_long; |
| 2516 | *uint8_t_alignment = reg_msg.uint8_t_alignment; |
| 2517 | *uint16_t_alignment = reg_msg.uint16_t_alignment; |
| 2518 | *uint32_t_alignment = reg_msg.uint32_t_alignment; |
| 2519 | *uint64_t_alignment = reg_msg.uint64_t_alignment; |
| 2520 | *long_alignment = reg_msg.long_alignment; |
| 2521 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); |
| 2522 | if (reg_msg.major < LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE || |
| 2523 | reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) { |
| 2524 | return -LTTNG_UST_ERR_UNSUP_MAJOR; |
| 2525 | } |
| 2526 | return get_cred(sock, ®_msg, pid, ppid, uid, gid); |
| 2527 | } |
| 2528 | |
| 2529 | int lttng_ust_ctl_recv_notify(int sock, enum lttng_ust_ctl_notify_cmd *notify_cmd) |
| 2530 | { |
| 2531 | struct ustcomm_notify_hdr header; |
| 2532 | ssize_t len; |
| 2533 | |
| 2534 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); |
| 2535 | if (len > 0 && len != sizeof(header)) |
| 2536 | return -EIO; |
| 2537 | if (len == 0) |
| 2538 | return -EPIPE; |
| 2539 | if (len < 0) |
| 2540 | return len; |
| 2541 | switch (header.notify_cmd) { |
| 2542 | case 0: |
| 2543 | *notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_EVENT; |
| 2544 | break; |
| 2545 | case 1: |
| 2546 | *notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_CHANNEL; |
| 2547 | break; |
| 2548 | case 2: |
| 2549 | *notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_ENUM; |
| 2550 | break; |
| 2551 | case 3: |
| 2552 | *notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_KEY; |
| 2553 | break; |
| 2554 | default: |
| 2555 | return -EINVAL; |
| 2556 | } |
| 2557 | return 0; |
| 2558 | } |
| 2559 | |
| 2560 | /* |
| 2561 | * Returns 0 on success, negative error value on error. |
| 2562 | */ |
| 2563 | int lttng_ust_ctl_recv_register_event(int sock, |
| 2564 | int *session_objd, |
| 2565 | int *channel_objd, |
| 2566 | char *event_name, |
| 2567 | int *loglevel, |
| 2568 | char **signature, |
| 2569 | size_t *nr_fields, |
| 2570 | struct lttng_ust_ctl_field **fields, |
| 2571 | char **model_emf_uri, |
| 2572 | uint64_t *user_token) |
| 2573 | { |
| 2574 | ssize_t len; |
| 2575 | struct ustcomm_notify_event_msg msg; |
| 2576 | size_t signature_len, fields_len, model_emf_uri_len; |
| 2577 | char *a_sign = NULL, *a_model_emf_uri = NULL; |
| 2578 | struct lttng_ust_ctl_field *a_fields = NULL; |
| 2579 | |
| 2580 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
| 2581 | if (len > 0 && len != sizeof(msg)) |
| 2582 | return -EIO; |
| 2583 | if (len == 0) |
| 2584 | return -EPIPE; |
| 2585 | if (len < 0) |
| 2586 | return len; |
| 2587 | |
| 2588 | *session_objd = msg.session_objd; |
| 2589 | *channel_objd = msg.channel_objd; |
| 2590 | strncpy(event_name, msg.event_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
| 2591 | event_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; |
| 2592 | *loglevel = msg.loglevel; |
| 2593 | signature_len = msg.signature_len; |
| 2594 | fields_len = msg.fields_len; |
| 2595 | *user_token = msg.user_token; |
| 2596 | |
| 2597 | if (fields_len % sizeof(*a_fields) != 0) { |
| 2598 | return -EINVAL; |
| 2599 | } |
| 2600 | |
| 2601 | model_emf_uri_len = msg.model_emf_uri_len; |
| 2602 | |
| 2603 | /* recv signature. contains at least \0. */ |
| 2604 | a_sign = zmalloc(signature_len); |
| 2605 | if (!a_sign) |
| 2606 | return -ENOMEM; |
| 2607 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); |
| 2608 | if (len > 0 && len != signature_len) { |
| 2609 | len = -EIO; |
| 2610 | goto signature_error; |
| 2611 | } |
| 2612 | if (len == 0) { |
| 2613 | len = -EPIPE; |
| 2614 | goto signature_error; |
| 2615 | } |
| 2616 | if (len < 0) { |
| 2617 | goto signature_error; |
| 2618 | } |
| 2619 | /* Enforce end of string */ |
| 2620 | a_sign[signature_len - 1] = '\0'; |
| 2621 | |
| 2622 | /* recv fields */ |
| 2623 | if (fields_len) { |
| 2624 | a_fields = zmalloc(fields_len); |
| 2625 | if (!a_fields) { |
| 2626 | len = -ENOMEM; |
| 2627 | goto signature_error; |
| 2628 | } |
| 2629 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); |
| 2630 | if (len > 0 && len != fields_len) { |
| 2631 | len = -EIO; |
| 2632 | goto fields_error; |
| 2633 | } |
| 2634 | if (len == 0) { |
| 2635 | len = -EPIPE; |
| 2636 | goto fields_error; |
| 2637 | } |
| 2638 | if (len < 0) { |
| 2639 | goto fields_error; |
| 2640 | } |
| 2641 | } |
| 2642 | |
| 2643 | if (model_emf_uri_len) { |
| 2644 | /* recv model_emf_uri_len */ |
| 2645 | a_model_emf_uri = zmalloc(model_emf_uri_len); |
| 2646 | if (!a_model_emf_uri) { |
| 2647 | len = -ENOMEM; |
| 2648 | goto fields_error; |
| 2649 | } |
| 2650 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, |
| 2651 | model_emf_uri_len); |
| 2652 | if (len > 0 && len != model_emf_uri_len) { |
| 2653 | len = -EIO; |
| 2654 | goto model_error; |
| 2655 | } |
| 2656 | if (len == 0) { |
| 2657 | len = -EPIPE; |
| 2658 | goto model_error; |
| 2659 | } |
| 2660 | if (len < 0) { |
| 2661 | goto model_error; |
| 2662 | } |
| 2663 | /* Enforce end of string */ |
| 2664 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; |
| 2665 | } |
| 2666 | |
| 2667 | *signature = a_sign; |
| 2668 | *nr_fields = fields_len / sizeof(*a_fields); |
| 2669 | *fields = a_fields; |
| 2670 | *model_emf_uri = a_model_emf_uri; |
| 2671 | |
| 2672 | return 0; |
| 2673 | |
| 2674 | model_error: |
| 2675 | free(a_model_emf_uri); |
| 2676 | fields_error: |
| 2677 | free(a_fields); |
| 2678 | signature_error: |
| 2679 | free(a_sign); |
| 2680 | return len; |
| 2681 | } |
| 2682 | |
| 2683 | /* |
| 2684 | * Returns 0 on success, negative error value on error. |
| 2685 | */ |
| 2686 | int lttng_ust_ctl_reply_register_event(int sock, |
| 2687 | uint32_t id, |
| 2688 | int ret_code) |
| 2689 | { |
| 2690 | ssize_t len; |
| 2691 | struct { |
| 2692 | struct ustcomm_notify_hdr header; |
| 2693 | struct ustcomm_notify_event_reply r; |
| 2694 | } reply; |
| 2695 | |
| 2696 | memset(&reply, 0, sizeof(reply)); |
| 2697 | reply.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_EVENT; |
| 2698 | reply.r.ret_code = ret_code; |
| 2699 | reply.r.id = id; |
| 2700 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
| 2701 | if (len > 0 && len != sizeof(reply)) |
| 2702 | return -EIO; |
| 2703 | if (len < 0) |
| 2704 | return len; |
| 2705 | return 0; |
| 2706 | } |
| 2707 | |
| 2708 | /* |
| 2709 | * Returns 0 on success, negative UST or system error value on error. |
| 2710 | */ |
| 2711 | int lttng_ust_ctl_recv_register_key(int sock, |
| 2712 | int *session_objd, /* session descriptor (output) */ |
| 2713 | int *map_objd, /* map descriptor (output) */ |
| 2714 | uint32_t *dimension, /* |
| 2715 | * Against which dimension is |
| 2716 | * this key expressed. (output) |
| 2717 | */ |
| 2718 | uint64_t **dimension_indexes, /* |
| 2719 | * Indexes (output, |
| 2720 | * dynamically |
| 2721 | * allocated, must be |
| 2722 | * free(3)'d by the |
| 2723 | * caller if function |
| 2724 | * returns success.) |
| 2725 | * Contains @dimension |
| 2726 | * elements. |
| 2727 | */ |
| 2728 | char **key_string, /* |
| 2729 | * key string (output, |
| 2730 | * dynamically allocated, must |
| 2731 | * be free(3)'d by the caller if |
| 2732 | * function returns success.) |
| 2733 | */ |
| 2734 | uint64_t *user_token) |
| 2735 | { |
| 2736 | ssize_t len; |
| 2737 | struct ustcomm_notify_key_msg msg; |
| 2738 | size_t dimension_indexes_len, key_string_len; |
| 2739 | uint64_t *a_dimension_indexes = NULL; |
| 2740 | char *a_key_string = NULL; |
| 2741 | |
| 2742 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
| 2743 | if (len > 0 && len != sizeof(msg)) |
| 2744 | return -EIO; |
| 2745 | if (len == 0) |
| 2746 | return -EPIPE; |
| 2747 | if (len < 0) |
| 2748 | return len; |
| 2749 | |
| 2750 | *session_objd = msg.session_objd; |
| 2751 | *map_objd = msg.map_objd; |
| 2752 | *dimension = msg.dimension; |
| 2753 | dimension_indexes_len = msg.dimension * sizeof(uint64_t); |
| 2754 | key_string_len = msg.key_string_len; |
| 2755 | *user_token = msg.user_token; |
| 2756 | |
| 2757 | if (dimension_indexes_len) { |
| 2758 | /* recv dimension_indexes */ |
| 2759 | a_dimension_indexes = zmalloc(dimension_indexes_len); |
| 2760 | if (!a_dimension_indexes) { |
| 2761 | len = -ENOMEM; |
| 2762 | goto error; |
| 2763 | } |
| 2764 | len = ustcomm_recv_unix_sock(sock, a_dimension_indexes, dimension_indexes_len); |
| 2765 | if (len > 0 && len != dimension_indexes_len) { |
| 2766 | len = -EIO; |
| 2767 | goto error; |
| 2768 | } |
| 2769 | if (len == 0) { |
| 2770 | len = -EPIPE; |
| 2771 | goto error; |
| 2772 | } |
| 2773 | if (len < 0) { |
| 2774 | goto error; |
| 2775 | } |
| 2776 | } |
| 2777 | |
| 2778 | if (key_string_len) { |
| 2779 | /* recv key_string */ |
| 2780 | a_key_string = zmalloc(key_string_len); |
| 2781 | if (!a_key_string) { |
| 2782 | len = -ENOMEM; |
| 2783 | goto error; |
| 2784 | } |
| 2785 | len = ustcomm_recv_unix_sock(sock, a_key_string, key_string_len); |
| 2786 | if (len > 0 && len != key_string_len) { |
| 2787 | len = -EIO; |
| 2788 | goto error; |
| 2789 | } |
| 2790 | if (len == 0) { |
| 2791 | len = -EPIPE; |
| 2792 | goto error; |
| 2793 | } |
| 2794 | if (len < 0) { |
| 2795 | goto error; |
| 2796 | } |
| 2797 | /* Enforce end of string */ |
| 2798 | a_key_string[key_string_len - 1] = '\0'; |
| 2799 | } |
| 2800 | |
| 2801 | *dimension_indexes = a_dimension_indexes; |
| 2802 | *key_string = a_key_string; |
| 2803 | return 0; |
| 2804 | |
| 2805 | error: |
| 2806 | free(a_key_string); |
| 2807 | free(a_dimension_indexes); |
| 2808 | return len; |
| 2809 | } |
| 2810 | |
| 2811 | /* |
| 2812 | * Returns 0 on success, negative error value on error. |
| 2813 | */ |
| 2814 | int lttng_ust_ctl_reply_register_key(int sock, |
| 2815 | uint64_t index, /* Index within dimension (input) */ |
| 2816 | int ret_code) /* return code. 0 ok, negative error */ |
| 2817 | { |
| 2818 | ssize_t len; |
| 2819 | struct { |
| 2820 | struct ustcomm_notify_hdr header; |
| 2821 | struct ustcomm_notify_key_reply r; |
| 2822 | } reply; |
| 2823 | |
| 2824 | memset(&reply, 0, sizeof(reply)); |
| 2825 | reply.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_KEY; |
| 2826 | reply.r.ret_code = ret_code; |
| 2827 | reply.r.index = index; |
| 2828 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
| 2829 | if (len > 0 && len != sizeof(reply)) |
| 2830 | return -EIO; |
| 2831 | if (len < 0) |
| 2832 | return len; |
| 2833 | return 0; |
| 2834 | } |
| 2835 | |
| 2836 | /* |
| 2837 | * Returns 0 on success, negative UST or system error value on error. |
| 2838 | */ |
| 2839 | int lttng_ust_ctl_recv_register_enum(int sock, |
| 2840 | int *session_objd, |
| 2841 | char *enum_name, |
| 2842 | struct lttng_ust_ctl_enum_entry **entries, |
| 2843 | size_t *nr_entries) |
| 2844 | { |
| 2845 | ssize_t len; |
| 2846 | struct ustcomm_notify_enum_msg msg; |
| 2847 | size_t entries_len; |
| 2848 | struct lttng_ust_ctl_enum_entry *a_entries = NULL; |
| 2849 | |
| 2850 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
| 2851 | if (len > 0 && len != sizeof(msg)) |
| 2852 | return -EIO; |
| 2853 | if (len == 0) |
| 2854 | return -EPIPE; |
| 2855 | if (len < 0) |
| 2856 | return len; |
| 2857 | |
| 2858 | *session_objd = msg.session_objd; |
| 2859 | strncpy(enum_name, msg.enum_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
| 2860 | enum_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; |
| 2861 | entries_len = msg.entries_len; |
| 2862 | |
| 2863 | if (entries_len % sizeof(*a_entries) != 0) { |
| 2864 | return -EINVAL; |
| 2865 | } |
| 2866 | |
| 2867 | /* recv entries */ |
| 2868 | if (entries_len) { |
| 2869 | a_entries = zmalloc(entries_len); |
| 2870 | if (!a_entries) |
| 2871 | return -ENOMEM; |
| 2872 | len = ustcomm_recv_unix_sock(sock, a_entries, entries_len); |
| 2873 | if (len > 0 && len != entries_len) { |
| 2874 | len = -EIO; |
| 2875 | goto entries_error; |
| 2876 | } |
| 2877 | if (len == 0) { |
| 2878 | len = -EPIPE; |
| 2879 | goto entries_error; |
| 2880 | } |
| 2881 | if (len < 0) { |
| 2882 | goto entries_error; |
| 2883 | } |
| 2884 | } |
| 2885 | *nr_entries = entries_len / sizeof(*a_entries); |
| 2886 | *entries = a_entries; |
| 2887 | |
| 2888 | return 0; |
| 2889 | |
| 2890 | entries_error: |
| 2891 | free(a_entries); |
| 2892 | return len; |
| 2893 | } |
| 2894 | |
| 2895 | /* |
| 2896 | * Returns 0 on success, negative error value on error. |
| 2897 | */ |
| 2898 | int lttng_ust_ctl_reply_register_enum(int sock, |
| 2899 | uint64_t id, |
| 2900 | int ret_code) |
| 2901 | { |
| 2902 | ssize_t len; |
| 2903 | struct { |
| 2904 | struct ustcomm_notify_hdr header; |
| 2905 | struct ustcomm_notify_enum_reply r; |
| 2906 | } reply; |
| 2907 | |
| 2908 | memset(&reply, 0, sizeof(reply)); |
| 2909 | reply.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_ENUM; |
| 2910 | reply.r.ret_code = ret_code; |
| 2911 | reply.r.enum_id = id; |
| 2912 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
| 2913 | if (len > 0 && len != sizeof(reply)) |
| 2914 | return -EIO; |
| 2915 | if (len < 0) |
| 2916 | return len; |
| 2917 | return 0; |
| 2918 | } |
| 2919 | |
| 2920 | /* |
| 2921 | * Returns 0 on success, negative UST or system error value on error. |
| 2922 | */ |
| 2923 | int lttng_ust_ctl_recv_register_channel(int sock, |
| 2924 | int *session_objd, /* session descriptor (output) */ |
| 2925 | int *channel_objd, /* channel descriptor (output) */ |
| 2926 | size_t *nr_fields, |
| 2927 | struct lttng_ust_ctl_field **fields) |
| 2928 | { |
| 2929 | ssize_t len; |
| 2930 | struct ustcomm_notify_channel_msg msg; |
| 2931 | size_t fields_len; |
| 2932 | struct lttng_ust_ctl_field *a_fields; |
| 2933 | |
| 2934 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
| 2935 | if (len > 0 && len != sizeof(msg)) |
| 2936 | return -EIO; |
| 2937 | if (len == 0) |
| 2938 | return -EPIPE; |
| 2939 | if (len < 0) |
| 2940 | return len; |
| 2941 | |
| 2942 | *session_objd = msg.session_objd; |
| 2943 | *channel_objd = msg.channel_objd; |
| 2944 | fields_len = msg.ctx_fields_len; |
| 2945 | |
| 2946 | if (fields_len % sizeof(*a_fields) != 0) { |
| 2947 | return -EINVAL; |
| 2948 | } |
| 2949 | |
| 2950 | /* recv fields */ |
| 2951 | if (fields_len) { |
| 2952 | a_fields = zmalloc(fields_len); |
| 2953 | if (!a_fields) { |
| 2954 | len = -ENOMEM; |
| 2955 | goto alloc_error; |
| 2956 | } |
| 2957 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); |
| 2958 | if (len > 0 && len != fields_len) { |
| 2959 | len = -EIO; |
| 2960 | goto fields_error; |
| 2961 | } |
| 2962 | if (len == 0) { |
| 2963 | len = -EPIPE; |
| 2964 | goto fields_error; |
| 2965 | } |
| 2966 | if (len < 0) { |
| 2967 | goto fields_error; |
| 2968 | } |
| 2969 | *fields = a_fields; |
| 2970 | } else { |
| 2971 | *fields = NULL; |
| 2972 | } |
| 2973 | *nr_fields = fields_len / sizeof(*a_fields); |
| 2974 | return 0; |
| 2975 | |
| 2976 | fields_error: |
| 2977 | free(a_fields); |
| 2978 | alloc_error: |
| 2979 | return len; |
| 2980 | } |
| 2981 | |
| 2982 | /* |
| 2983 | * Returns 0 on success, negative error value on error. |
| 2984 | */ |
| 2985 | int lttng_ust_ctl_reply_register_channel(int sock, |
| 2986 | uint32_t chan_id, |
| 2987 | enum lttng_ust_ctl_channel_header header_type, |
| 2988 | int ret_code) |
| 2989 | { |
| 2990 | ssize_t len; |
| 2991 | struct { |
| 2992 | struct ustcomm_notify_hdr header; |
| 2993 | struct ustcomm_notify_channel_reply r; |
| 2994 | } reply; |
| 2995 | |
| 2996 | memset(&reply, 0, sizeof(reply)); |
| 2997 | reply.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_CHANNEL; |
| 2998 | reply.r.ret_code = ret_code; |
| 2999 | reply.r.chan_id = chan_id; |
| 3000 | switch (header_type) { |
| 3001 | case LTTNG_UST_CTL_CHANNEL_HEADER_COMPACT: |
| 3002 | reply.r.header_type = 1; |
| 3003 | break; |
| 3004 | case LTTNG_UST_CTL_CHANNEL_HEADER_LARGE: |
| 3005 | reply.r.header_type = 2; |
| 3006 | break; |
| 3007 | default: |
| 3008 | reply.r.header_type = 0; |
| 3009 | break; |
| 3010 | } |
| 3011 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
| 3012 | if (len > 0 && len != sizeof(reply)) |
| 3013 | return -EIO; |
| 3014 | if (len < 0) |
| 3015 | return len; |
| 3016 | return 0; |
| 3017 | } |
| 3018 | |
| 3019 | /* Regenerate the statedump. */ |
| 3020 | int lttng_ust_ctl_regenerate_statedump(int sock, int handle) |
| 3021 | { |
| 3022 | struct ustcomm_ust_msg lum; |
| 3023 | struct ustcomm_ust_reply lur; |
| 3024 | int ret; |
| 3025 | |
| 3026 | memset(&lum, 0, sizeof(lum)); |
| 3027 | lum.handle = handle; |
| 3028 | lum.cmd = LTTNG_UST_ABI_SESSION_STATEDUMP; |
| 3029 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 3030 | if (ret) |
| 3031 | return ret; |
| 3032 | DBG("Regenerated statedump for handle %u", handle); |
| 3033 | return 0; |
| 3034 | } |
| 3035 | |
| 3036 | /* counter operations */ |
| 3037 | |
| 3038 | int lttng_ust_ctl_get_nr_cpu_per_counter(void) |
| 3039 | { |
| 3040 | return get_possible_cpus_array_len(); |
| 3041 | } |
| 3042 | |
| 3043 | struct lttng_ust_ctl_daemon_counter * |
| 3044 | lttng_ust_ctl_create_counter(size_t nr_dimensions, |
| 3045 | const struct lttng_ust_ctl_counter_dimension *dimensions, |
| 3046 | int64_t global_sum_step, |
| 3047 | int global_counter_fd, |
| 3048 | int nr_counter_cpu_fds, |
| 3049 | const int *counter_cpu_fds, |
| 3050 | enum lttng_ust_ctl_counter_bitness bitness, |
| 3051 | enum lttng_ust_ctl_counter_arithmetic arithmetic, |
| 3052 | uint32_t alloc_flags, |
| 3053 | bool coalesce_hits) |
| 3054 | { |
| 3055 | const char *transport_name; |
| 3056 | struct lttng_ust_ctl_daemon_counter *counter; |
| 3057 | struct lttng_counter_transport *transport; |
| 3058 | struct lttng_counter_dimension ust_dim[LTTNG_COUNTER_DIMENSION_MAX]; |
| 3059 | size_t i; |
| 3060 | |
| 3061 | if (nr_dimensions > LTTNG_COUNTER_DIMENSION_MAX) |
| 3062 | return NULL; |
| 3063 | /* Currently, only per-cpu allocation is supported. */ |
| 3064 | switch (alloc_flags) { |
| 3065 | case LTTNG_UST_CTL_COUNTER_ALLOC_PER_CPU: |
| 3066 | break; |
| 3067 | |
| 3068 | case LTTNG_UST_CTL_COUNTER_ALLOC_PER_CPU | LTTNG_UST_CTL_COUNTER_ALLOC_GLOBAL: |
| 3069 | case LTTNG_UST_CTL_COUNTER_ALLOC_GLOBAL: |
| 3070 | default: |
| 3071 | return NULL; |
| 3072 | } |
| 3073 | switch (bitness) { |
| 3074 | case LTTNG_UST_CTL_COUNTER_BITNESS_32: |
| 3075 | switch (arithmetic) { |
| 3076 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR: |
| 3077 | transport_name = "counter-per-cpu-32-modular"; |
| 3078 | break; |
| 3079 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_SATURATION: |
| 3080 | transport_name = "counter-per-cpu-32-saturation"; |
| 3081 | break; |
| 3082 | default: |
| 3083 | return NULL; |
| 3084 | } |
| 3085 | break; |
| 3086 | case LTTNG_UST_CTL_COUNTER_BITNESS_64: |
| 3087 | switch (arithmetic) { |
| 3088 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR: |
| 3089 | transport_name = "counter-per-cpu-64-modular"; |
| 3090 | break; |
| 3091 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_SATURATION: |
| 3092 | transport_name = "counter-per-cpu-64-saturation"; |
| 3093 | break; |
| 3094 | default: |
| 3095 | return NULL; |
| 3096 | } |
| 3097 | break; |
| 3098 | default: |
| 3099 | return NULL; |
| 3100 | } |
| 3101 | |
| 3102 | transport = lttng_counter_transport_find(transport_name); |
| 3103 | if (!transport) { |
| 3104 | DBG("LTTng transport %s not found\n", |
| 3105 | transport_name); |
| 3106 | return NULL; |
| 3107 | } |
| 3108 | |
| 3109 | counter = zmalloc(sizeof(*counter)); |
| 3110 | if (!counter) |
| 3111 | return NULL; |
| 3112 | counter->attr = zmalloc(sizeof(*counter->attr)); |
| 3113 | if (!counter->attr) |
| 3114 | goto free_counter; |
| 3115 | counter->attr->bitness = bitness; |
| 3116 | counter->attr->arithmetic = arithmetic; |
| 3117 | counter->attr->nr_dimensions = nr_dimensions; |
| 3118 | counter->attr->global_sum_step = global_sum_step; |
| 3119 | counter->attr->coalesce_hits = coalesce_hits; |
| 3120 | for (i = 0; i < nr_dimensions; i++) |
| 3121 | counter->attr->dimensions[i] = dimensions[i]; |
| 3122 | |
| 3123 | for (i = 0; i < nr_dimensions; i++) { |
| 3124 | ust_dim[i].size = dimensions[i].size; |
| 3125 | ust_dim[i].underflow_index = dimensions[i].underflow_index; |
| 3126 | ust_dim[i].overflow_index = dimensions[i].overflow_index; |
| 3127 | ust_dim[i].has_underflow = dimensions[i].has_underflow; |
| 3128 | ust_dim[i].has_overflow = dimensions[i].has_overflow; |
| 3129 | switch (dimensions[i].key_type) { |
| 3130 | case LTTNG_UST_CTL_KEY_TYPE_TOKENS: |
| 3131 | ust_dim[i].key_type = LTTNG_KEY_TYPE_TOKENS; |
| 3132 | break; |
| 3133 | case LTTNG_UST_CTL_KEY_TYPE_INTEGER: /* Fall-through */ |
| 3134 | default: |
| 3135 | goto free_attr; |
| 3136 | } |
| 3137 | } |
| 3138 | counter->counter = transport->ops.priv->counter_create(nr_dimensions, |
| 3139 | ust_dim, global_sum_step, global_counter_fd, |
| 3140 | nr_counter_cpu_fds, counter_cpu_fds, true); |
| 3141 | if (!counter->counter) |
| 3142 | goto free_attr; |
| 3143 | counter->ops = &transport->ops; |
| 3144 | return counter; |
| 3145 | |
| 3146 | free_attr: |
| 3147 | free(counter->attr); |
| 3148 | free_counter: |
| 3149 | free(counter); |
| 3150 | return NULL; |
| 3151 | } |
| 3152 | |
| 3153 | int lttng_ust_ctl_create_counter_data(struct lttng_ust_ctl_daemon_counter *counter, |
| 3154 | struct lttng_ust_abi_object_data **_counter_data) |
| 3155 | { |
| 3156 | struct lttng_ust_abi_counter_conf *counter_conf = NULL; |
| 3157 | struct lttng_ust_abi_counter_dimension *dimension; |
| 3158 | uint32_t conf_len = sizeof(struct lttng_ust_abi_counter_conf) + |
| 3159 | sizeof(struct lttng_ust_abi_counter_dimension); |
| 3160 | struct lttng_ust_abi_object_data *counter_data; |
| 3161 | int ret; |
| 3162 | |
| 3163 | if (counter->attr->nr_dimensions != 1) { |
| 3164 | ret = -EINVAL; |
| 3165 | goto error; |
| 3166 | } |
| 3167 | counter_conf = zmalloc(conf_len); |
| 3168 | if (!counter_conf) { |
| 3169 | ret = -ENOMEM; |
| 3170 | goto error; |
| 3171 | } |
| 3172 | counter_conf->len = sizeof(struct lttng_ust_abi_counter_conf); |
| 3173 | counter_conf->flags |= counter->attr->coalesce_hits ? LTTNG_UST_ABI_COUNTER_CONF_FLAG_COALESCE_HITS : 0; |
| 3174 | switch (counter->attr->arithmetic) { |
| 3175 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR: |
| 3176 | counter_conf->arithmetic = LTTNG_UST_ABI_COUNTER_ARITHMETIC_MODULAR; |
| 3177 | break; |
| 3178 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_SATURATION: |
| 3179 | counter_conf->arithmetic = LTTNG_UST_ABI_COUNTER_ARITHMETIC_SATURATION; |
| 3180 | break; |
| 3181 | default: |
| 3182 | ret = -EINVAL; |
| 3183 | goto error; |
| 3184 | } |
| 3185 | switch (counter->attr->bitness) { |
| 3186 | case LTTNG_UST_CTL_COUNTER_BITNESS_32: |
| 3187 | counter_conf->bitness = LTTNG_UST_ABI_COUNTER_BITNESS_32; |
| 3188 | break; |
| 3189 | case LTTNG_UST_CTL_COUNTER_BITNESS_64: |
| 3190 | counter_conf->bitness = LTTNG_UST_ABI_COUNTER_BITNESS_64; |
| 3191 | break; |
| 3192 | default: |
| 3193 | return -EINVAL; |
| 3194 | } |
| 3195 | counter_conf->global_sum_step = counter->attr->global_sum_step; |
| 3196 | |
| 3197 | counter_conf->number_dimensions = 1; |
| 3198 | counter_conf->elem_len = sizeof(struct lttng_ust_abi_counter_dimension); |
| 3199 | |
| 3200 | dimension = (struct lttng_ust_abi_counter_dimension *)((char *)counter_conf + sizeof(struct lttng_ust_abi_counter_conf)); |
| 3201 | dimension->flags |= counter->attr->dimensions[0].has_underflow ? LTTNG_UST_ABI_COUNTER_DIMENSION_FLAG_UNDERFLOW : 0; |
| 3202 | dimension->flags |= counter->attr->dimensions[0].has_overflow ? LTTNG_UST_ABI_COUNTER_DIMENSION_FLAG_OVERFLOW : 0; |
| 3203 | dimension->size = counter->attr->dimensions[0].size; |
| 3204 | dimension->underflow_index = counter->attr->dimensions[0].underflow_index; |
| 3205 | dimension->overflow_index = counter->attr->dimensions[0].overflow_index; |
| 3206 | switch (counter->attr->dimensions[0].key_type) { |
| 3207 | case LTTNG_UST_CTL_KEY_TYPE_TOKENS: |
| 3208 | dimension->key_type = LTTNG_UST_ABI_KEY_TYPE_TOKENS; |
| 3209 | break; |
| 3210 | case LTTNG_UST_CTL_KEY_TYPE_INTEGER: /* Fall-through */ |
| 3211 | default: |
| 3212 | ret = -EINVAL; |
| 3213 | goto error; |
| 3214 | } |
| 3215 | |
| 3216 | counter_data = zmalloc(sizeof(*counter_data)); |
| 3217 | if (!counter_data) { |
| 3218 | ret = -ENOMEM; |
| 3219 | goto error; |
| 3220 | } |
| 3221 | counter_data->type = LTTNG_UST_ABI_OBJECT_TYPE_COUNTER; |
| 3222 | counter_data->handle = -1; |
| 3223 | counter_data->size = conf_len; |
| 3224 | counter_data->u.counter.data = counter_conf; |
| 3225 | *_counter_data = counter_data; |
| 3226 | |
| 3227 | return 0; |
| 3228 | |
| 3229 | error: |
| 3230 | free(counter_conf); |
| 3231 | return ret; |
| 3232 | } |
| 3233 | |
| 3234 | int lttng_ust_ctl_create_counter_global_data(struct lttng_ust_ctl_daemon_counter *counter, |
| 3235 | struct lttng_ust_abi_object_data **_counter_global_data) |
| 3236 | { |
| 3237 | struct lttng_ust_abi_object_data *counter_global_data; |
| 3238 | int ret, fd; |
| 3239 | size_t len; |
| 3240 | |
| 3241 | if (lttng_counter_get_global_shm(counter->counter->priv->counter, &fd, &len)) |
| 3242 | return -EINVAL; |
| 3243 | counter_global_data = zmalloc(sizeof(*counter_global_data)); |
| 3244 | if (!counter_global_data) { |
| 3245 | ret = -ENOMEM; |
| 3246 | goto error_alloc; |
| 3247 | } |
| 3248 | counter_global_data->type = LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_GLOBAL; |
| 3249 | counter_global_data->handle = -1; |
| 3250 | counter_global_data->size = len; |
| 3251 | counter_global_data->u.counter_global.shm_fd = fd; |
| 3252 | *_counter_global_data = counter_global_data; |
| 3253 | return 0; |
| 3254 | |
| 3255 | error_alloc: |
| 3256 | return ret; |
| 3257 | } |
| 3258 | |
| 3259 | int lttng_ust_ctl_create_counter_cpu_data(struct lttng_ust_ctl_daemon_counter *counter, int cpu, |
| 3260 | struct lttng_ust_abi_object_data **_counter_cpu_data) |
| 3261 | { |
| 3262 | struct lttng_ust_abi_object_data *counter_cpu_data; |
| 3263 | int ret, fd; |
| 3264 | size_t len; |
| 3265 | |
| 3266 | if (lttng_counter_get_cpu_shm(counter->counter->priv->counter, cpu, &fd, &len)) |
| 3267 | return -EINVAL; |
| 3268 | counter_cpu_data = zmalloc(sizeof(*counter_cpu_data)); |
| 3269 | if (!counter_cpu_data) { |
| 3270 | ret = -ENOMEM; |
| 3271 | goto error_alloc; |
| 3272 | } |
| 3273 | counter_cpu_data->type = LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_CPU; |
| 3274 | counter_cpu_data->handle = -1; |
| 3275 | counter_cpu_data->size = len; |
| 3276 | counter_cpu_data->u.counter_cpu.shm_fd = fd; |
| 3277 | counter_cpu_data->u.counter_cpu.cpu_nr = cpu; |
| 3278 | *_counter_cpu_data = counter_cpu_data; |
| 3279 | return 0; |
| 3280 | |
| 3281 | error_alloc: |
| 3282 | return ret; |
| 3283 | } |
| 3284 | |
| 3285 | void lttng_ust_ctl_destroy_counter(struct lttng_ust_ctl_daemon_counter *counter) |
| 3286 | { |
| 3287 | counter->ops->priv->counter_destroy(counter->counter); |
| 3288 | free(counter->attr); |
| 3289 | free(counter); |
| 3290 | } |
| 3291 | |
| 3292 | /* |
| 3293 | * Protocol for LTTNG_UST_ABI_OLD_COUNTER command: |
| 3294 | * |
| 3295 | * - send: struct ustcomm_ust_msg |
| 3296 | * - receive: struct ustcomm_ust_reply |
| 3297 | * - send: counter data |
| 3298 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 3299 | */ |
| 3300 | static |
| 3301 | int lttng_ust_ctl_send_old_counter_data_to_ust(int sock, int parent_handle, |
| 3302 | struct lttng_ust_abi_object_data *counter_data) |
| 3303 | { |
| 3304 | const struct lttng_ust_abi_counter_conf *counter_conf = counter_data->u.counter.data; |
| 3305 | const struct lttng_ust_abi_counter_dimension *dimension; |
| 3306 | struct lttng_ust_abi_old_counter_conf old_counter_conf = {}; |
| 3307 | struct ustcomm_ust_msg lum = {}; |
| 3308 | struct ustcomm_ust_reply lur; |
| 3309 | int ret; |
| 3310 | size_t size; |
| 3311 | ssize_t len; |
| 3312 | |
| 3313 | if (!counter_data) |
| 3314 | return -EINVAL; |
| 3315 | |
| 3316 | if (counter_conf->number_dimensions != 1) |
| 3317 | return -EINVAL; |
| 3318 | old_counter_conf.coalesce_hits = (counter_conf->flags & LTTNG_UST_ABI_COUNTER_CONF_FLAG_COALESCE_HITS) ? 1 : 0; |
| 3319 | old_counter_conf.arithmetic = counter_conf->arithmetic; |
| 3320 | old_counter_conf.bitness = counter_conf->bitness; |
| 3321 | old_counter_conf.global_sum_step = counter_conf->global_sum_step; |
| 3322 | |
| 3323 | dimension = (struct lttng_ust_abi_counter_dimension *)((char *)counter_conf + sizeof(struct lttng_ust_abi_counter_conf)); |
| 3324 | old_counter_conf.number_dimensions = 1; |
| 3325 | old_counter_conf.dimensions[0].size = dimension->size; |
| 3326 | old_counter_conf.dimensions[0].has_underflow = (dimension->flags & LTTNG_UST_ABI_COUNTER_DIMENSION_FLAG_UNDERFLOW) ? 1 : 0; |
| 3327 | old_counter_conf.dimensions[0].has_overflow = (dimension->flags & LTTNG_UST_ABI_COUNTER_DIMENSION_FLAG_OVERFLOW) ? 1 : 0; |
| 3328 | old_counter_conf.dimensions[0].underflow_index = dimension->underflow_index; |
| 3329 | old_counter_conf.dimensions[0].overflow_index = dimension->overflow_index; |
| 3330 | if (dimension->key_type != LTTNG_UST_ABI_KEY_TYPE_TOKENS) |
| 3331 | return -EINVAL; |
| 3332 | |
| 3333 | size = sizeof(old_counter_conf); |
| 3334 | lum.handle = parent_handle; |
| 3335 | lum.cmd = LTTNG_UST_ABI_OLD_COUNTER; |
| 3336 | lum.u.counter_old.len = size; |
| 3337 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 3338 | if (ret) |
| 3339 | return ret; |
| 3340 | |
| 3341 | /* Send counter data */ |
| 3342 | len = ustcomm_send_unix_sock(sock, &old_counter_conf, size); |
| 3343 | if (len != size) { |
| 3344 | if (len < 0) |
| 3345 | return len; |
| 3346 | else |
| 3347 | return -EIO; |
| 3348 | } |
| 3349 | |
| 3350 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 3351 | if (!ret) { |
| 3352 | counter_data->handle = lur.ret_val; |
| 3353 | } |
| 3354 | return ret; |
| 3355 | } |
| 3356 | |
| 3357 | /* |
| 3358 | * Protocol for LTTNG_UST_ABI_OLD_COUNTER_GLOBAL command: |
| 3359 | * |
| 3360 | * - send: struct ustcomm_ust_msg |
| 3361 | * - receive: struct ustcomm_ust_reply |
| 3362 | * - send: file descriptor |
| 3363 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 3364 | */ |
| 3365 | static |
| 3366 | int lttng_ust_ctl_send_old_counter_global_data_to_ust(int sock, |
| 3367 | struct lttng_ust_abi_object_data *counter_data, |
| 3368 | struct lttng_ust_abi_object_data *counter_global_data) |
| 3369 | { |
| 3370 | struct ustcomm_ust_msg lum = {}; |
| 3371 | struct ustcomm_ust_reply lur; |
| 3372 | int ret, shm_fd[1]; |
| 3373 | size_t size; |
| 3374 | ssize_t len; |
| 3375 | |
| 3376 | if (!counter_data || !counter_global_data) |
| 3377 | return -EINVAL; |
| 3378 | |
| 3379 | size = counter_global_data->size; |
| 3380 | lum.handle = counter_data->handle; /* parent handle */ |
| 3381 | lum.cmd = LTTNG_UST_ABI_OLD_COUNTER_GLOBAL; |
| 3382 | lum.u.counter_global_old.len = size; |
| 3383 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 3384 | if (ret) |
| 3385 | return ret; |
| 3386 | |
| 3387 | shm_fd[0] = counter_global_data->u.counter_global.shm_fd; |
| 3388 | len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1); |
| 3389 | if (len <= 0) { |
| 3390 | if (len < 0) |
| 3391 | return len; |
| 3392 | else |
| 3393 | return -EIO; |
| 3394 | } |
| 3395 | |
| 3396 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 3397 | if (!ret) { |
| 3398 | counter_global_data->handle = lur.ret_val; |
| 3399 | } |
| 3400 | return ret; |
| 3401 | } |
| 3402 | |
| 3403 | /* |
| 3404 | * Protocol for LTTNG_UST_ABI_OLD_COUNTER_CPU command: |
| 3405 | * |
| 3406 | * - send: struct ustcomm_ust_msg |
| 3407 | * - receive: struct ustcomm_ust_reply |
| 3408 | * - send: file descriptor |
| 3409 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 3410 | */ |
| 3411 | static |
| 3412 | int lttng_ust_ctl_send_old_counter_cpu_data_to_ust(int sock, |
| 3413 | struct lttng_ust_abi_object_data *counter_data, |
| 3414 | struct lttng_ust_abi_object_data *counter_cpu_data) |
| 3415 | { |
| 3416 | struct ustcomm_ust_msg lum = {}; |
| 3417 | struct ustcomm_ust_reply lur; |
| 3418 | int ret, shm_fd[1]; |
| 3419 | size_t size; |
| 3420 | ssize_t len; |
| 3421 | |
| 3422 | if (!counter_data || !counter_cpu_data) |
| 3423 | return -EINVAL; |
| 3424 | |
| 3425 | size = counter_cpu_data->size; |
| 3426 | lum.handle = counter_data->handle; /* parent handle */ |
| 3427 | lum.cmd = LTTNG_UST_ABI_OLD_COUNTER_CPU; |
| 3428 | lum.u.counter_cpu_old.len = size; |
| 3429 | lum.u.counter_cpu_old.cpu_nr = counter_cpu_data->u.counter_cpu.cpu_nr; |
| 3430 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 3431 | if (ret) |
| 3432 | return ret; |
| 3433 | |
| 3434 | shm_fd[0] = counter_cpu_data->u.counter_global.shm_fd; |
| 3435 | len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1); |
| 3436 | if (len <= 0) { |
| 3437 | if (len < 0) |
| 3438 | return len; |
| 3439 | else |
| 3440 | return -EIO; |
| 3441 | } |
| 3442 | |
| 3443 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 3444 | if (!ret) { |
| 3445 | counter_cpu_data->handle = lur.ret_val; |
| 3446 | } |
| 3447 | return ret; |
| 3448 | } |
| 3449 | |
| 3450 | /* |
| 3451 | * Protocol for LTTNG_UST_ABI_COUNTER command: |
| 3452 | * |
| 3453 | * - send: struct ustcomm_ust_msg |
| 3454 | * - receive: struct ustcomm_ust_reply |
| 3455 | * - send: counter data |
| 3456 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 3457 | */ |
| 3458 | int lttng_ust_ctl_send_counter_data_to_ust(int sock, int parent_handle, |
| 3459 | struct lttng_ust_abi_object_data *counter_data) |
| 3460 | { |
| 3461 | struct ustcomm_ust_msg lum = {}; |
| 3462 | struct ustcomm_ust_reply lur; |
| 3463 | int ret; |
| 3464 | size_t size; |
| 3465 | ssize_t len; |
| 3466 | |
| 3467 | if (!counter_data) |
| 3468 | return -EINVAL; |
| 3469 | |
| 3470 | size = counter_data->size; |
| 3471 | lum.handle = parent_handle; |
| 3472 | lum.cmd = LTTNG_UST_ABI_COUNTER; |
| 3473 | lum.u.var_len_cmd.cmd_len = size; |
| 3474 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 3475 | if (ret == -LTTNG_UST_ERR_INVAL) { |
| 3476 | return lttng_ust_ctl_send_old_counter_data_to_ust(sock, parent_handle, counter_data); |
| 3477 | } |
| 3478 | if (ret) { |
| 3479 | return ret; |
| 3480 | } |
| 3481 | |
| 3482 | /* Send var len cmd */ |
| 3483 | len = ustcomm_send_unix_sock(sock, counter_data->u.counter.data, size); |
| 3484 | if (len != size) { |
| 3485 | if (len < 0) |
| 3486 | return len; |
| 3487 | else |
| 3488 | return -EIO; |
| 3489 | } |
| 3490 | |
| 3491 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 3492 | if (!ret) { |
| 3493 | counter_data->handle = lur.ret_val; |
| 3494 | } |
| 3495 | return ret; |
| 3496 | } |
| 3497 | |
| 3498 | /* |
| 3499 | * Protocol for LTTNG_UST_ABI_COUNTER_GLOBAL command: |
| 3500 | * |
| 3501 | * - send: struct ustcomm_ust_msg |
| 3502 | * - receive: struct ustcomm_ust_reply |
| 3503 | * - send: file descriptor |
| 3504 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 3505 | */ |
| 3506 | int lttng_ust_ctl_send_counter_global_data_to_ust(int sock, |
| 3507 | struct lttng_ust_abi_object_data *counter_data, |
| 3508 | struct lttng_ust_abi_object_data *counter_global_data) |
| 3509 | { |
| 3510 | struct lttng_ust_abi_counter_global counter_global = {}; |
| 3511 | struct ustcomm_ust_msg lum = {}; |
| 3512 | struct ustcomm_ust_reply lur; |
| 3513 | int ret, shm_fd[1]; |
| 3514 | size_t size; |
| 3515 | ssize_t len; |
| 3516 | |
| 3517 | if (!counter_data || !counter_global_data) |
| 3518 | return -EINVAL; |
| 3519 | |
| 3520 | size = counter_global_data->size; |
| 3521 | lum.handle = counter_data->handle; /* parent handle */ |
| 3522 | lum.cmd = LTTNG_UST_ABI_COUNTER_GLOBAL; |
| 3523 | lum.u.var_len_cmd.cmd_len = sizeof(struct lttng_ust_abi_counter_global); |
| 3524 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 3525 | if (ret == -LTTNG_UST_ERR_INVAL) { |
| 3526 | return lttng_ust_ctl_send_old_counter_global_data_to_ust(sock, counter_data, counter_global_data); |
| 3527 | } |
| 3528 | if (ret) { |
| 3529 | return ret; |
| 3530 | } |
| 3531 | |
| 3532 | counter_global.len = sizeof(struct lttng_ust_abi_counter_global); |
| 3533 | counter_global.shm_len = size; |
| 3534 | |
| 3535 | /* Send var len cmd */ |
| 3536 | len = ustcomm_send_unix_sock(sock, &counter_global, sizeof(struct lttng_ust_abi_counter_global)); |
| 3537 | if (len != sizeof(struct lttng_ust_abi_counter_global)) { |
| 3538 | if (len < 0) |
| 3539 | return len; |
| 3540 | else |
| 3541 | return -EIO; |
| 3542 | } |
| 3543 | |
| 3544 | shm_fd[0] = counter_global_data->u.counter_global.shm_fd; |
| 3545 | len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1); |
| 3546 | if (len <= 0) { |
| 3547 | if (len < 0) |
| 3548 | return len; |
| 3549 | else |
| 3550 | return -EIO; |
| 3551 | } |
| 3552 | |
| 3553 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 3554 | if (!ret) { |
| 3555 | counter_global_data->handle = lur.ret_val; |
| 3556 | } |
| 3557 | return ret; |
| 3558 | } |
| 3559 | |
| 3560 | /* |
| 3561 | * Protocol for LTTNG_UST_ABI_COUNTER_CPU command: |
| 3562 | * |
| 3563 | * - send: struct ustcomm_ust_msg |
| 3564 | * - receive: struct ustcomm_ust_reply |
| 3565 | * - send: file descriptor |
| 3566 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 3567 | */ |
| 3568 | int lttng_ust_ctl_send_counter_cpu_data_to_ust(int sock, |
| 3569 | struct lttng_ust_abi_object_data *counter_data, |
| 3570 | struct lttng_ust_abi_object_data *counter_cpu_data) |
| 3571 | { |
| 3572 | struct lttng_ust_abi_counter_cpu counter_cpu = {}; |
| 3573 | struct ustcomm_ust_msg lum = {}; |
| 3574 | struct ustcomm_ust_reply lur; |
| 3575 | int ret, shm_fd[1]; |
| 3576 | size_t size; |
| 3577 | ssize_t len; |
| 3578 | |
| 3579 | if (!counter_data || !counter_cpu_data) |
| 3580 | return -EINVAL; |
| 3581 | |
| 3582 | size = counter_cpu_data->size; |
| 3583 | lum.handle = counter_data->handle; /* parent handle */ |
| 3584 | lum.cmd = LTTNG_UST_ABI_COUNTER_CPU; |
| 3585 | lum.u.var_len_cmd.cmd_len = sizeof(struct lttng_ust_abi_counter_cpu); |
| 3586 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 3587 | if (ret == -LTTNG_UST_ERR_INVAL) { |
| 3588 | return lttng_ust_ctl_send_old_counter_cpu_data_to_ust(sock, counter_data, counter_cpu_data); |
| 3589 | } |
| 3590 | if (ret) { |
| 3591 | return ret; |
| 3592 | } |
| 3593 | |
| 3594 | counter_cpu.len = sizeof(struct lttng_ust_abi_counter_cpu); |
| 3595 | counter_cpu.shm_len = size; |
| 3596 | counter_cpu.cpu_nr = counter_cpu_data->u.counter_cpu.cpu_nr; |
| 3597 | |
| 3598 | /* Send var len cmd */ |
| 3599 | len = ustcomm_send_unix_sock(sock, &counter_cpu, sizeof(struct lttng_ust_abi_counter_cpu)); |
| 3600 | if (len != sizeof(struct lttng_ust_abi_counter_cpu)) { |
| 3601 | if (len < 0) |
| 3602 | return len; |
| 3603 | else |
| 3604 | return -EIO; |
| 3605 | } |
| 3606 | |
| 3607 | shm_fd[0] = counter_cpu_data->u.counter_global.shm_fd; |
| 3608 | len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1); |
| 3609 | if (len <= 0) { |
| 3610 | if (len < 0) |
| 3611 | return len; |
| 3612 | else |
| 3613 | return -EIO; |
| 3614 | } |
| 3615 | |
| 3616 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 3617 | if (!ret) { |
| 3618 | counter_cpu_data->handle = lur.ret_val; |
| 3619 | } |
| 3620 | return ret; |
| 3621 | } |
| 3622 | |
| 3623 | int lttng_ust_ctl_counter_read(struct lttng_ust_ctl_daemon_counter *counter, |
| 3624 | const size_t *dimension_indexes, |
| 3625 | int cpu, int64_t *value, |
| 3626 | bool *overflow, bool *underflow) |
| 3627 | { |
| 3628 | return counter->ops->priv->counter_read(counter->counter, dimension_indexes, cpu, |
| 3629 | value, overflow, underflow); |
| 3630 | } |
| 3631 | |
| 3632 | int lttng_ust_ctl_counter_aggregate(struct lttng_ust_ctl_daemon_counter *counter, |
| 3633 | const size_t *dimension_indexes, |
| 3634 | int64_t *value, |
| 3635 | bool *overflow, bool *underflow) |
| 3636 | { |
| 3637 | return counter->ops->priv->counter_aggregate(counter->counter, dimension_indexes, |
| 3638 | value, overflow, underflow); |
| 3639 | } |
| 3640 | |
| 3641 | int lttng_ust_ctl_counter_clear(struct lttng_ust_ctl_daemon_counter *counter, |
| 3642 | const size_t *dimension_indexes) |
| 3643 | { |
| 3644 | return counter->ops->priv->counter_clear(counter->counter, dimension_indexes); |
| 3645 | } |
| 3646 | |
| 3647 | /* |
| 3648 | * Protocol for LTTNG_UST_COUNTER_EVENT command: |
| 3649 | * |
| 3650 | * - send: struct ustcomm_ust_msg |
| 3651 | * - receive: struct ustcomm_ust_reply |
| 3652 | * - send: struct lttng_ust_counter_event |
| 3653 | * - receive: struct ustcomm_ust_reply (actual command return code) |
| 3654 | */ |
| 3655 | int lttng_ust_ctl_counter_create_event(int sock, |
| 3656 | struct lttng_ust_abi_counter_event *counter_event, |
| 3657 | size_t counter_event_len, |
| 3658 | struct lttng_ust_abi_object_data *counter_data, |
| 3659 | struct lttng_ust_abi_object_data **_counter_event_data) |
| 3660 | { |
| 3661 | struct ustcomm_ust_msg lum = {}; |
| 3662 | struct ustcomm_ust_reply lur; |
| 3663 | struct lttng_ust_abi_object_data *counter_event_data; |
| 3664 | ssize_t len; |
| 3665 | int ret; |
| 3666 | |
| 3667 | if (!counter_data || !_counter_event_data) |
| 3668 | return -EINVAL; |
| 3669 | |
| 3670 | counter_event_data = zmalloc(sizeof(*counter_event_data)); |
| 3671 | if (!counter_event_data) |
| 3672 | return -ENOMEM; |
| 3673 | counter_event_data->type = LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_EVENT; |
| 3674 | lum.handle = counter_data->handle; |
| 3675 | lum.cmd = LTTNG_UST_ABI_COUNTER_EVENT; |
| 3676 | lum.u.var_len_cmd.cmd_len = counter_event_len; |
| 3677 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
| 3678 | if (ret) { |
| 3679 | free(counter_event_data); |
| 3680 | return ret; |
| 3681 | } |
| 3682 | |
| 3683 | /* Send var len cmd */ |
| 3684 | len = ustcomm_send_unix_sock(sock, counter_event, counter_event_len); |
| 3685 | if (len != counter_event_len) { |
| 3686 | free(counter_event_data); |
| 3687 | if (len < 0) |
| 3688 | return len; |
| 3689 | else |
| 3690 | return -EIO; |
| 3691 | } |
| 3692 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
| 3693 | if (ret) { |
| 3694 | free(counter_event_data); |
| 3695 | return ret; |
| 3696 | } |
| 3697 | counter_event_data->handle = lur.ret_val; |
| 3698 | DBG("received counter event handle %u", counter_event_data->handle); |
| 3699 | *_counter_event_data = counter_event_data; |
| 3700 | return 0; |
| 3701 | } |
| 3702 | |
| 3703 | int lttng_ust_ctl_get_version(uint32_t *major, uint32_t *minor, |
| 3704 | uint32_t *patchlevel) { |
| 3705 | *major = LTTNG_UST_MAJOR_VERSION; |
| 3706 | *minor = LTTNG_UST_MINOR_VERSION; |
| 3707 | *patchlevel = LTTNG_UST_PATCHLEVEL_VERSION; |
| 3708 | return 0; |
| 3709 | } |
| 3710 | |
| 3711 | static |
| 3712 | void lttng_ust_ctl_ctor(void) |
| 3713 | __attribute__((constructor)); |
| 3714 | static |
| 3715 | void lttng_ust_ctl_ctor(void) |
| 3716 | { |
| 3717 | /* |
| 3718 | * Call the liblttng-ust-common constructor to ensure it runs first. |
| 3719 | */ |
| 3720 | lttng_ust_common_ctor(); |
| 3721 | |
| 3722 | lttng_ust_ring_buffer_clients_init(); |
| 3723 | lttng_ust_counter_clients_init(); |
| 3724 | lib_ringbuffer_signal_init(); |
| 3725 | } |
| 3726 | |
| 3727 | static |
| 3728 | void lttng_ust_ctl_exit(void) |
| 3729 | __attribute__((destructor)); |
| 3730 | static |
| 3731 | void lttng_ust_ctl_exit(void) |
| 3732 | { |
| 3733 | lttng_ust_counter_clients_exit(); |
| 3734 | lttng_ust_ring_buffer_clients_exit(); |
| 3735 | } |