1 /* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */ 2 /* 3 * Header file for the io_uring interface. 4 * 5 * Copyright (C) 2019 Jens Axboe 6 * Copyright (C) 2019 Christoph Hellwig 7 */ 8 #ifndef LINUX_IO_URING_H 9 #define LINUX_IO_URING_H 10 11 #include <linux/fs.h> 12 #include <linux/types.h> 13 #include <linux/time_types.h> 14 15 #ifdef __cplusplus 16 extern "C" { 17 #endif 18 19 /* 20 * IO submission data structure (Submission Queue Entry) 21 */ 22 struct io_uring_sqe { 23 __u8 opcode; /* type of operation for this sqe */ 24 __u8 flags; /* IOSQE_ flags */ 25 __u16 ioprio; /* ioprio for the request */ 26 __s32 fd; /* file descriptor to do IO on */ 27 union { 28 __u64 off; /* offset into file */ 29 __u64 addr2; 30 struct { 31 __u32 cmd_op; 32 __u32 __pad1; 33 }; 34 }; 35 union { 36 __u64 addr; /* pointer to buffer or iovecs */ 37 __u64 splice_off_in; 38 }; 39 __u32 len; /* buffer size or number of iovecs */ 40 union { 41 __kernel_rwf_t rw_flags; 42 __u32 fsync_flags; 43 __u16 poll_events; /* compatibility */ 44 __u32 poll32_events; /* word-reversed for BE */ 45 __u32 sync_range_flags; 46 __u32 msg_flags; 47 __u32 timeout_flags; 48 __u32 accept_flags; 49 __u32 cancel_flags; 50 __u32 open_flags; 51 __u32 statx_flags; 52 __u32 fadvise_advice; 53 __u32 splice_flags; 54 __u32 rename_flags; 55 __u32 unlink_flags; 56 __u32 hardlink_flags; 57 __u32 xattr_flags; 58 __u32 msg_ring_flags; 59 __u32 uring_cmd_flags; 60 }; 61 __u64 user_data; /* data to be passed back at completion time */ 62 /* pack this to avoid bogus arm OABI complaints */ 63 union { 64 /* index into fixed buffers, if used */ 65 __u16 buf_index; 66 /* for grouped buffer selection */ 67 __u16 buf_group; 68 } __attribute__((packed)); 69 /* personality to use, if used */ 70 __u16 personality; 71 union { 72 __s32 splice_fd_in; 73 __u32 file_index; 74 struct { 75 __u16 addr_len; 76 __u16 __pad3[1]; 77 }; 78 }; 79 union { 80 struct { 81 __u64 addr3; 82 __u64 __pad2[1]; 83 }; 84 /* 85 * If the ring is initialized with IORING_SETUP_SQE128, then 86 * this field is used for 80 bytes of arbitrary command data 87 */ 88 __u8 cmd[0]; 89 }; 90 }; 91 92 /* 93 * If sqe->file_index is set to this for opcodes that instantiate a new 94 * direct descriptor (like openat/openat2/accept), then io_uring will allocate 95 * an available direct descriptor instead of having the application pass one 96 * in. The picked direct descriptor will be returned in cqe->res, or -ENFILE 97 * if the space is full. 98 */ 99 #define IORING_FILE_INDEX_ALLOC (~0U) 100 101 enum { 102 IOSQE_FIXED_FILE_BIT, 103 IOSQE_IO_DRAIN_BIT, 104 IOSQE_IO_LINK_BIT, 105 IOSQE_IO_HARDLINK_BIT, 106 IOSQE_ASYNC_BIT, 107 IOSQE_BUFFER_SELECT_BIT, 108 IOSQE_CQE_SKIP_SUCCESS_BIT, 109 }; 110 111 /* 112 * sqe->flags 113 */ 114 /* use fixed fileset */ 115 #define IOSQE_FIXED_FILE (1U << IOSQE_FIXED_FILE_BIT) 116 /* issue after inflight IO */ 117 #define IOSQE_IO_DRAIN (1U << IOSQE_IO_DRAIN_BIT) 118 /* links next sqe */ 119 #define IOSQE_IO_LINK (1U << IOSQE_IO_LINK_BIT) 120 /* like LINK, but stronger */ 121 #define IOSQE_IO_HARDLINK (1U << IOSQE_IO_HARDLINK_BIT) 122 /* always go async */ 123 #define IOSQE_ASYNC (1U << IOSQE_ASYNC_BIT) 124 /* select buffer from sqe->buf_group */ 125 #define IOSQE_BUFFER_SELECT (1U << IOSQE_BUFFER_SELECT_BIT) 126 /* don't post CQE if request succeeded */ 127 #define IOSQE_CQE_SKIP_SUCCESS (1U << IOSQE_CQE_SKIP_SUCCESS_BIT) 128 129 /* 130 * io_uring_setup() flags 131 */ 132 #define IORING_SETUP_IOPOLL (1U << 0) /* io_context is polled */ 133 #define IORING_SETUP_SQPOLL (1U << 1) /* SQ poll thread */ 134 #define IORING_SETUP_SQ_AFF (1U << 2) /* sq_thread_cpu is valid */ 135 #define IORING_SETUP_CQSIZE (1U << 3) /* app defines CQ size */ 136 #define IORING_SETUP_CLAMP (1U << 4) /* clamp SQ/CQ ring sizes */ 137 #define IORING_SETUP_ATTACH_WQ (1U << 5) /* attach to existing wq */ 138 #define IORING_SETUP_R_DISABLED (1U << 6) /* start with ring disabled */ 139 #define IORING_SETUP_SUBMIT_ALL (1U << 7) /* continue submit on error */ 140 /* 141 * Cooperative task running. When requests complete, they often require 142 * forcing the submitter to transition to the kernel to complete. If this 143 * flag is set, work will be done when the task transitions anyway, rather 144 * than force an inter-processor interrupt reschedule. This avoids interrupting 145 * a task running in userspace, and saves an IPI. 146 */ 147 #define IORING_SETUP_COOP_TASKRUN (1U << 8) 148 /* 149 * If COOP_TASKRUN is set, get notified if task work is available for 150 * running and a kernel transition would be needed to run it. This sets 151 * IORING_SQ_TASKRUN in the sq ring flags. Not valid with COOP_TASKRUN. 152 */ 153 #define IORING_SETUP_TASKRUN_FLAG (1U << 9) 154 #define IORING_SETUP_SQE128 (1U << 10) /* SQEs are 128 byte */ 155 #define IORING_SETUP_CQE32 (1U << 11) /* CQEs are 32 byte */ 156 /* 157 * Only one task is allowed to submit requests 158 */ 159 #define IORING_SETUP_SINGLE_ISSUER (1U << 12) 160 161 /* 162 * Defer running task work to get events. 163 * Rather than running bits of task work whenever the task transitions 164 * try to do it just before it is needed. 165 */ 166 #define IORING_SETUP_DEFER_TASKRUN (1U << 13) 167 168 enum io_uring_op { 169 IORING_OP_NOP, 170 IORING_OP_READV, 171 IORING_OP_WRITEV, 172 IORING_OP_FSYNC, 173 IORING_OP_READ_FIXED, 174 IORING_OP_WRITE_FIXED, 175 IORING_OP_POLL_ADD, 176 IORING_OP_POLL_REMOVE, 177 IORING_OP_SYNC_FILE_RANGE, 178 IORING_OP_SENDMSG, 179 IORING_OP_RECVMSG, 180 IORING_OP_TIMEOUT, 181 IORING_OP_TIMEOUT_REMOVE, 182 IORING_OP_ACCEPT, 183 IORING_OP_ASYNC_CANCEL, 184 IORING_OP_LINK_TIMEOUT, 185 IORING_OP_CONNECT, 186 IORING_OP_FALLOCATE, 187 IORING_OP_OPENAT, 188 IORING_OP_CLOSE, 189 IORING_OP_FILES_UPDATE, 190 IORING_OP_STATX, 191 IORING_OP_READ, 192 IORING_OP_WRITE, 193 IORING_OP_FADVISE, 194 IORING_OP_MADVISE, 195 IORING_OP_SEND, 196 IORING_OP_RECV, 197 IORING_OP_OPENAT2, 198 IORING_OP_EPOLL_CTL, 199 IORING_OP_SPLICE, 200 IORING_OP_PROVIDE_BUFFERS, 201 IORING_OP_REMOVE_BUFFERS, 202 IORING_OP_TEE, 203 IORING_OP_SHUTDOWN, 204 IORING_OP_RENAMEAT, 205 IORING_OP_UNLINKAT, 206 IORING_OP_MKDIRAT, 207 IORING_OP_SYMLINKAT, 208 IORING_OP_LINKAT, 209 IORING_OP_MSG_RING, 210 IORING_OP_FSETXATTR, 211 IORING_OP_SETXATTR, 212 IORING_OP_FGETXATTR, 213 IORING_OP_GETXATTR, 214 IORING_OP_SOCKET, 215 IORING_OP_URING_CMD, 216 IORING_OP_SEND_ZC, 217 IORING_OP_SENDMSG_ZC, 218 219 /* this goes last, obviously */ 220 IORING_OP_LAST, 221 }; 222 223 /* 224 * sqe->uring_cmd_flags 225 * IORING_URING_CMD_FIXED use registered buffer; pass this flag 226 * along with setting sqe->buf_index. 227 */ 228 #define IORING_URING_CMD_FIXED (1U << 0) 229 230 231 /* 232 * sqe->fsync_flags 233 */ 234 #define IORING_FSYNC_DATASYNC (1U << 0) 235 236 /* 237 * sqe->timeout_flags 238 */ 239 #define IORING_TIMEOUT_ABS (1U << 0) 240 #define IORING_TIMEOUT_UPDATE (1U << 1) 241 #define IORING_TIMEOUT_BOOTTIME (1U << 2) 242 #define IORING_TIMEOUT_REALTIME (1U << 3) 243 #define IORING_LINK_TIMEOUT_UPDATE (1U << 4) 244 #define IORING_TIMEOUT_ETIME_SUCCESS (1U << 5) 245 #define IORING_TIMEOUT_CLOCK_MASK (IORING_TIMEOUT_BOOTTIME | IORING_TIMEOUT_REALTIME) 246 #define IORING_TIMEOUT_UPDATE_MASK (IORING_TIMEOUT_UPDATE | IORING_LINK_TIMEOUT_UPDATE) 247 /* 248 * sqe->splice_flags 249 * extends splice(2) flags 250 */ 251 #define SPLICE_F_FD_IN_FIXED (1U << 31) /* the last bit of __u32 */ 252 253 /* 254 * POLL_ADD flags. Note that since sqe->poll_events is the flag space, the 255 * command flags for POLL_ADD are stored in sqe->len. 256 * 257 * IORING_POLL_ADD_MULTI Multishot poll. Sets IORING_CQE_F_MORE if 258 * the poll handler will continue to report 259 * CQEs on behalf of the same SQE. 260 * 261 * IORING_POLL_UPDATE Update existing poll request, matching 262 * sqe->addr as the old user_data field. 263 * 264 * IORING_POLL_LEVEL Level triggered poll. 265 */ 266 #define IORING_POLL_ADD_MULTI (1U << 0) 267 #define IORING_POLL_UPDATE_EVENTS (1U << 1) 268 #define IORING_POLL_UPDATE_USER_DATA (1U << 2) 269 #define IORING_POLL_ADD_LEVEL (1U << 3) 270 271 /* 272 * ASYNC_CANCEL flags. 273 * 274 * IORING_ASYNC_CANCEL_ALL Cancel all requests that match the given key 275 * IORING_ASYNC_CANCEL_FD Key off 'fd' for cancelation rather than the 276 * request 'user_data' 277 * IORING_ASYNC_CANCEL_ANY Match any request 278 * IORING_ASYNC_CANCEL_FD_FIXED 'fd' passed in is a fixed descriptor 279 */ 280 #define IORING_ASYNC_CANCEL_ALL (1U << 0) 281 #define IORING_ASYNC_CANCEL_FD (1U << 1) 282 #define IORING_ASYNC_CANCEL_ANY (1U << 2) 283 #define IORING_ASYNC_CANCEL_FD_FIXED (1U << 3) 284 285 /* 286 * send/sendmsg and recv/recvmsg flags (sqe->ioprio) 287 * 288 * IORING_RECVSEND_POLL_FIRST If set, instead of first attempting to send 289 * or receive and arm poll if that yields an 290 * -EAGAIN result, arm poll upfront and skip 291 * the initial transfer attempt. 292 * 293 * IORING_RECV_MULTISHOT Multishot recv. Sets IORING_CQE_F_MORE if 294 * the handler will continue to report 295 * CQEs on behalf of the same SQE. 296 * 297 * IORING_RECVSEND_FIXED_BUF Use registered buffers, the index is stored in 298 * the buf_index field. 299 */ 300 #define IORING_RECVSEND_POLL_FIRST (1U << 0) 301 #define IORING_RECV_MULTISHOT (1U << 1) 302 #define IORING_RECVSEND_FIXED_BUF (1U << 2) 303 304 /* 305 * accept flags stored in sqe->ioprio 306 */ 307 #define IORING_ACCEPT_MULTISHOT (1U << 0) 308 309 /* 310 * IORING_OP_MSG_RING command types, stored in sqe->addr 311 */ 312 enum { 313 IORING_MSG_DATA, /* pass sqe->len as 'res' and off as user_data */ 314 IORING_MSG_SEND_FD, /* send a registered fd to another ring */ 315 }; 316 317 /* 318 * IORING_OP_MSG_RING flags (sqe->msg_ring_flags) 319 * 320 * IORING_MSG_RING_CQE_SKIP Don't post a CQE to the target ring. Not 321 * applicable for IORING_MSG_DATA, obviously. 322 */ 323 #define IORING_MSG_RING_CQE_SKIP (1U << 0) 324 325 /* 326 * IO completion data structure (Completion Queue Entry) 327 */ 328 struct io_uring_cqe { 329 __u64 user_data; /* sqe->data submission passed back */ 330 __s32 res; /* result code for this event */ 331 __u32 flags; 332 333 /* 334 * If the ring is initialized with IORING_SETUP_CQE32, then this field 335 * contains 16-bytes of padding, doubling the size of the CQE. 336 */ 337 __u64 big_cqe[]; 338 }; 339 340 /* 341 * cqe->flags 342 * 343 * IORING_CQE_F_BUFFER If set, the upper 16 bits are the buffer ID 344 * IORING_CQE_F_MORE If set, parent SQE will generate more CQE entries 345 * IORING_CQE_F_SOCK_NONEMPTY If set, more data to read after socket recv 346 * IORING_CQE_F_NOTIF Set for notification CQEs. Can be used to distinct 347 * them from sends. 348 */ 349 #define IORING_CQE_F_BUFFER (1U << 0) 350 #define IORING_CQE_F_MORE (1U << 1) 351 #define IORING_CQE_F_SOCK_NONEMPTY (1U << 2) 352 #define IORING_CQE_F_NOTIF (1U << 3) 353 354 enum { 355 IORING_CQE_BUFFER_SHIFT = 16, 356 }; 357 358 /* 359 * Magic offsets for the application to mmap the data it needs 360 */ 361 #define IORING_OFF_SQ_RING 0ULL 362 #define IORING_OFF_CQ_RING 0x8000000ULL 363 #define IORING_OFF_SQES 0x10000000ULL 364 365 /* 366 * Filled with the offset for mmap(2) 367 */ 368 struct io_sqring_offsets { 369 __u32 head; 370 __u32 tail; 371 __u32 ring_mask; 372 __u32 ring_entries; 373 __u32 flags; 374 __u32 dropped; 375 __u32 array; 376 __u32 resv1; 377 __u64 resv2; 378 }; 379 380 /* 381 * sq_ring->flags 382 */ 383 #define IORING_SQ_NEED_WAKEUP (1U << 0) /* needs io_uring_enter wakeup */ 384 #define IORING_SQ_CQ_OVERFLOW (1U << 1) /* CQ ring is overflown */ 385 #define IORING_SQ_TASKRUN (1U << 2) /* task should enter the kernel */ 386 387 struct io_cqring_offsets { 388 __u32 head; 389 __u32 tail; 390 __u32 ring_mask; 391 __u32 ring_entries; 392 __u32 overflow; 393 __u32 cqes; 394 __u32 flags; 395 __u32 resv1; 396 __u64 resv2; 397 }; 398 399 /* 400 * cq_ring->flags 401 */ 402 403 /* disable eventfd notifications */ 404 #define IORING_CQ_EVENTFD_DISABLED (1U << 0) 405 406 /* 407 * io_uring_enter(2) flags 408 */ 409 #define IORING_ENTER_GETEVENTS (1U << 0) 410 #define IORING_ENTER_SQ_WAKEUP (1U << 1) 411 #define IORING_ENTER_SQ_WAIT (1U << 2) 412 #define IORING_ENTER_EXT_ARG (1U << 3) 413 #define IORING_ENTER_REGISTERED_RING (1U << 4) 414 415 /* 416 * Passed in for io_uring_setup(2). Copied back with updated info on success 417 */ 418 struct io_uring_params { 419 __u32 sq_entries; 420 __u32 cq_entries; 421 __u32 flags; 422 __u32 sq_thread_cpu; 423 __u32 sq_thread_idle; 424 __u32 features; 425 __u32 wq_fd; 426 __u32 resv[3]; 427 struct io_sqring_offsets sq_off; 428 struct io_cqring_offsets cq_off; 429 }; 430 431 /* 432 * io_uring_params->features flags 433 */ 434 #define IORING_FEAT_SINGLE_MMAP (1U << 0) 435 #define IORING_FEAT_NODROP (1U << 1) 436 #define IORING_FEAT_SUBMIT_STABLE (1U << 2) 437 #define IORING_FEAT_RW_CUR_POS (1U << 3) 438 #define IORING_FEAT_CUR_PERSONALITY (1U << 4) 439 #define IORING_FEAT_FAST_POLL (1U << 5) 440 #define IORING_FEAT_POLL_32BITS (1U << 6) 441 #define IORING_FEAT_SQPOLL_NONFIXED (1U << 7) 442 #define IORING_FEAT_EXT_ARG (1U << 8) 443 #define IORING_FEAT_NATIVE_WORKERS (1U << 9) 444 #define IORING_FEAT_RSRC_TAGS (1U << 10) 445 #define IORING_FEAT_CQE_SKIP (1U << 11) 446 #define IORING_FEAT_LINKED_FILE (1U << 12) 447 448 /* 449 * io_uring_register(2) opcodes and arguments 450 */ 451 enum { 452 IORING_REGISTER_BUFFERS = 0, 453 IORING_UNREGISTER_BUFFERS = 1, 454 IORING_REGISTER_FILES = 2, 455 IORING_UNREGISTER_FILES = 3, 456 IORING_REGISTER_EVENTFD = 4, 457 IORING_UNREGISTER_EVENTFD = 5, 458 IORING_REGISTER_FILES_UPDATE = 6, 459 IORING_REGISTER_EVENTFD_ASYNC = 7, 460 IORING_REGISTER_PROBE = 8, 461 IORING_REGISTER_PERSONALITY = 9, 462 IORING_UNREGISTER_PERSONALITY = 10, 463 IORING_REGISTER_RESTRICTIONS = 11, 464 IORING_REGISTER_ENABLE_RINGS = 12, 465 466 /* extended with tagging */ 467 IORING_REGISTER_FILES2 = 13, 468 IORING_REGISTER_FILES_UPDATE2 = 14, 469 IORING_REGISTER_BUFFERS2 = 15, 470 IORING_REGISTER_BUFFERS_UPDATE = 16, 471 472 /* set/clear io-wq thread affinities */ 473 IORING_REGISTER_IOWQ_AFF = 17, 474 IORING_UNREGISTER_IOWQ_AFF = 18, 475 476 /* set/get max number of io-wq workers */ 477 IORING_REGISTER_IOWQ_MAX_WORKERS = 19, 478 479 /* register/unregister io_uring fd with the ring */ 480 IORING_REGISTER_RING_FDS = 20, 481 IORING_UNREGISTER_RING_FDS = 21, 482 483 /* register ring based provide buffer group */ 484 IORING_REGISTER_PBUF_RING = 22, 485 IORING_UNREGISTER_PBUF_RING = 23, 486 487 /* sync cancelation API */ 488 IORING_REGISTER_SYNC_CANCEL = 24, 489 490 /* register a range of fixed file slots for automatic slot allocation */ 491 IORING_REGISTER_FILE_ALLOC_RANGE = 25, 492 493 /* this goes last */ 494 IORING_REGISTER_LAST 495 }; 496 497 /* io-wq worker categories */ 498 enum { 499 IO_WQ_BOUND, 500 IO_WQ_UNBOUND, 501 }; 502 503 /* deprecated, see struct io_uring_rsrc_update */ 504 struct io_uring_files_update { 505 __u32 offset; 506 __u32 resv; 507 __aligned_u64 /* __s32 * */ fds; 508 }; 509 510 /* 511 * Register a fully sparse file space, rather than pass in an array of all 512 * -1 file descriptors. 513 */ 514 #define IORING_RSRC_REGISTER_SPARSE (1U << 0) 515 516 struct io_uring_rsrc_register { 517 __u32 nr; 518 __u32 flags; 519 __u64 resv2; 520 __aligned_u64 data; 521 __aligned_u64 tags; 522 }; 523 524 struct io_uring_rsrc_update { 525 __u32 offset; 526 __u32 resv; 527 __aligned_u64 data; 528 }; 529 530 struct io_uring_rsrc_update2 { 531 __u32 offset; 532 __u32 resv; 533 __aligned_u64 data; 534 __aligned_u64 tags; 535 __u32 nr; 536 __u32 resv2; 537 }; 538 539 struct io_uring_notification_slot { 540 __u64 tag; 541 __u64 resv[3]; 542 }; 543 544 struct io_uring_notification_register { 545 __u32 nr_slots; 546 __u32 resv; 547 __u64 resv2; 548 __u64 data; 549 __u64 resv3; 550 }; 551 552 /* Skip updating fd indexes set to this value in the fd table */ 553 #define IORING_REGISTER_FILES_SKIP (-2) 554 555 #define IO_URING_OP_SUPPORTED (1U << 0) 556 557 struct io_uring_probe_op { 558 __u8 op; 559 __u8 resv; 560 __u16 flags; /* IO_URING_OP_* flags */ 561 __u32 resv2; 562 }; 563 564 struct io_uring_probe { 565 __u8 last_op; /* last opcode supported */ 566 __u8 ops_len; /* length of ops[] array below */ 567 __u16 resv; 568 __u32 resv2[3]; 569 struct io_uring_probe_op ops[]; 570 }; 571 572 struct io_uring_restriction { 573 __u16 opcode; 574 union { 575 __u8 register_op; /* IORING_RESTRICTION_REGISTER_OP */ 576 __u8 sqe_op; /* IORING_RESTRICTION_SQE_OP */ 577 __u8 sqe_flags; /* IORING_RESTRICTION_SQE_FLAGS_* */ 578 }; 579 __u8 resv; 580 __u32 resv2[3]; 581 }; 582 583 struct io_uring_buf { 584 __u64 addr; 585 __u32 len; 586 __u16 bid; 587 __u16 resv; 588 }; 589 590 struct io_uring_buf_ring { 591 union { 592 /* 593 * To avoid spilling into more pages than we need to, the 594 * ring tail is overlaid with the io_uring_buf->resv field. 595 */ 596 struct { 597 __u64 resv1; 598 __u32 resv2; 599 __u16 resv3; 600 __u16 tail; 601 }; 602 struct io_uring_buf bufs[0]; 603 }; 604 }; 605 606 /* argument for IORING_(UN)REGISTER_PBUF_RING */ 607 struct io_uring_buf_reg { 608 __u64 ring_addr; 609 __u32 ring_entries; 610 __u16 bgid; 611 __u16 pad; 612 __u64 resv[3]; 613 }; 614 615 /* 616 * io_uring_restriction->opcode values 617 */ 618 enum { 619 /* Allow an io_uring_register(2) opcode */ 620 IORING_RESTRICTION_REGISTER_OP = 0, 621 622 /* Allow an sqe opcode */ 623 IORING_RESTRICTION_SQE_OP = 1, 624 625 /* Allow sqe flags */ 626 IORING_RESTRICTION_SQE_FLAGS_ALLOWED = 2, 627 628 /* Require sqe flags (these flags must be set on each submission) */ 629 IORING_RESTRICTION_SQE_FLAGS_REQUIRED = 3, 630 631 IORING_RESTRICTION_LAST 632 }; 633 634 struct io_uring_getevents_arg { 635 __u64 sigmask; 636 __u32 sigmask_sz; 637 __u32 pad; 638 __u64 ts; 639 }; 640 641 /* 642 * Argument for IORING_REGISTER_SYNC_CANCEL 643 */ 644 struct io_uring_sync_cancel_reg { 645 __u64 addr; 646 __s32 fd; 647 __u32 flags; 648 struct __kernel_timespec timeout; 649 __u64 pad[4]; 650 }; 651 652 /* 653 * Argument for IORING_REGISTER_FILE_ALLOC_RANGE 654 * The range is specified as [off, off + len) 655 */ 656 struct io_uring_file_index_range { 657 __u32 off; 658 __u32 len; 659 __u64 resv; 660 }; 661 662 struct io_uring_recvmsg_out { 663 __u32 namelen; 664 __u32 controllen; 665 __u32 payloadlen; 666 __u32 flags; 667 }; 668 669 #ifdef __cplusplus 670 } 671 #endif 672 673 #endif 674
