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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 Axboe6 * Copyright (C) 2019 Christoph Hellwig7 */8#ifndef LINUX_IO_URING_H9#define LINUX_IO_URING_H10 11#include <linux/fs.h>12#include <linux/types.h>13/*14 * this file is shared with liburing and that has to autodetect15 * if linux/time_types.h is available or not, it can16 * define UAPI_LINUX_IO_URING_H_SKIP_LINUX_TIME_TYPES_H17 * if linux/time_types.h is not available18 */19#ifndef UAPI_LINUX_IO_URING_H_SKIP_LINUX_TIME_TYPES_H20#include <linux/time_types.h>21#endif22 23#ifdef __cplusplus24extern "C" {25#endif26 27/*28 * IO submission data structure (Submission Queue Entry)29 */30struct io_uring_sqe {31 __u8 opcode; /* type of operation for this sqe */32 __u8 flags; /* IOSQE_ flags */33 __u16 ioprio; /* ioprio for the request */34 __s32 fd; /* file descriptor to do IO on */35 union {36 __u64 off; /* offset into file */37 __u64 addr2;38 struct {39 __u32 cmd_op;40 __u32 __pad1;41 };42 };43 union {44 __u64 addr; /* pointer to buffer or iovecs */45 __u64 splice_off_in;46 struct {47 __u32 level;48 __u32 optname;49 };50 };51 __u32 len; /* buffer size or number of iovecs */52 union {53 __kernel_rwf_t rw_flags;54 __u32 fsync_flags;55 __u16 poll_events; /* compatibility */56 __u32 poll32_events; /* word-reversed for BE */57 __u32 sync_range_flags;58 __u32 msg_flags;59 __u32 timeout_flags;60 __u32 accept_flags;61 __u32 cancel_flags;62 __u32 open_flags;63 __u32 statx_flags;64 __u32 fadvise_advice;65 __u32 splice_flags;66 __u32 rename_flags;67 __u32 unlink_flags;68 __u32 hardlink_flags;69 __u32 xattr_flags;70 __u32 msg_ring_flags;71 __u32 uring_cmd_flags;72 __u32 waitid_flags;73 __u32 futex_flags;74 };75 __u64 user_data; /* data to be passed back at completion time */76 /* pack this to avoid bogus arm OABI complaints */77 union {78 /* index into fixed buffers, if used */79 __u16 buf_index;80 /* for grouped buffer selection */81 __u16 buf_group;82 } __attribute__((packed));83 /* personality to use, if used */84 __u16 personality;85 union {86 __s32 splice_fd_in;87 __u32 file_index;88 __u32 optlen;89 struct {90 __u16 addr_len;91 __u16 __pad3[1];92 };93 };94 union {95 struct {96 __u64 addr3;97 __u64 __pad2[1];98 };99 __u64 optval;100 /*101 * If the ring is initialized with IORING_SETUP_SQE128, then102 * this field is used for 80 bytes of arbitrary command data103 */104 __u8 cmd[0];105 };106};107 108/*109 * If sqe->file_index is set to this for opcodes that instantiate a new110 * direct descriptor (like openat/openat2/accept), then io_uring will allocate111 * an available direct descriptor instead of having the application pass one112 * in. The picked direct descriptor will be returned in cqe->res, or -ENFILE113 * if the space is full.114 */115#define IORING_FILE_INDEX_ALLOC (~0U)116 117enum {118 IOSQE_FIXED_FILE_BIT,119 IOSQE_IO_DRAIN_BIT,120 IOSQE_IO_LINK_BIT,121 IOSQE_IO_HARDLINK_BIT,122 IOSQE_ASYNC_BIT,123 IOSQE_BUFFER_SELECT_BIT,124 IOSQE_CQE_SKIP_SUCCESS_BIT,125};126 127/*128 * sqe->flags129 */130/* use fixed fileset */131#define IOSQE_FIXED_FILE (1U << IOSQE_FIXED_FILE_BIT)132/* issue after inflight IO */133#define IOSQE_IO_DRAIN (1U << IOSQE_IO_DRAIN_BIT)134/* links next sqe */135#define IOSQE_IO_LINK (1U << IOSQE_IO_LINK_BIT)136/* like LINK, but stronger */137#define IOSQE_IO_HARDLINK (1U << IOSQE_IO_HARDLINK_BIT)138/* always go async */139#define IOSQE_ASYNC (1U << IOSQE_ASYNC_BIT)140/* select buffer from sqe->buf_group */141#define IOSQE_BUFFER_SELECT (1U << IOSQE_BUFFER_SELECT_BIT)142/* don't post CQE if request succeeded */143#define IOSQE_CQE_SKIP_SUCCESS (1U << IOSQE_CQE_SKIP_SUCCESS_BIT)144 145/*146 * io_uring_setup() flags147 */148#define IORING_SETUP_IOPOLL (1U << 0) /* io_context is polled */149#define IORING_SETUP_SQPOLL (1U << 1) /* SQ poll thread */150#define IORING_SETUP_SQ_AFF (1U << 2) /* sq_thread_cpu is valid */151#define IORING_SETUP_CQSIZE (1U << 3) /* app defines CQ size */152#define IORING_SETUP_CLAMP (1U << 4) /* clamp SQ/CQ ring sizes */153#define IORING_SETUP_ATTACH_WQ (1U << 5) /* attach to existing wq */154#define IORING_SETUP_R_DISABLED (1U << 6) /* start with ring disabled */155#define IORING_SETUP_SUBMIT_ALL (1U << 7) /* continue submit on error */156/*157 * Cooperative task running. When requests complete, they often require158 * forcing the submitter to transition to the kernel to complete. If this159 * flag is set, work will be done when the task transitions anyway, rather160 * than force an inter-processor interrupt reschedule. This avoids interrupting161 * a task running in userspace, and saves an IPI.162 */163#define IORING_SETUP_COOP_TASKRUN (1U << 8)164/*165 * If COOP_TASKRUN is set, get notified if task work is available for166 * running and a kernel transition would be needed to run it. This sets167 * IORING_SQ_TASKRUN in the sq ring flags. Not valid with COOP_TASKRUN.168 */169#define IORING_SETUP_TASKRUN_FLAG (1U << 9)170#define IORING_SETUP_SQE128 (1U << 10) /* SQEs are 128 byte */171#define IORING_SETUP_CQE32 (1U << 11) /* CQEs are 32 byte */172/*173 * Only one task is allowed to submit requests174 */175#define IORING_SETUP_SINGLE_ISSUER (1U << 12)176 177/*178 * Defer running task work to get events.179 * Rather than running bits of task work whenever the task transitions180 * try to do it just before it is needed.181 */182#define IORING_SETUP_DEFER_TASKRUN (1U << 13)183 184/*185 * Application provides the memory for the rings186 */187#define IORING_SETUP_NO_MMAP (1U << 14)188 189/*190 * Register the ring fd in itself for use with191 * IORING_REGISTER_USE_REGISTERED_RING; return a registered fd index rather192 * than an fd.193 */194#define IORING_SETUP_REGISTERED_FD_ONLY (1U << 15)195 196/*197 * Removes indirection through the SQ index array.198 */199#define IORING_SETUP_NO_SQARRAY (1U << 16)200 201enum io_uring_op {202 IORING_OP_NOP,203 IORING_OP_READV,204 IORING_OP_WRITEV,205 IORING_OP_FSYNC,206 IORING_OP_READ_FIXED,207 IORING_OP_WRITE_FIXED,208 IORING_OP_POLL_ADD,209 IORING_OP_POLL_REMOVE,210 IORING_OP_SYNC_FILE_RANGE,211 IORING_OP_SENDMSG,212 IORING_OP_RECVMSG,213 IORING_OP_TIMEOUT,214 IORING_OP_TIMEOUT_REMOVE,215 IORING_OP_ACCEPT,216 IORING_OP_ASYNC_CANCEL,217 IORING_OP_LINK_TIMEOUT,218 IORING_OP_CONNECT,219 IORING_OP_FALLOCATE,220 IORING_OP_OPENAT,221 IORING_OP_CLOSE,222 IORING_OP_FILES_UPDATE,223 IORING_OP_STATX,224 IORING_OP_READ,225 IORING_OP_WRITE,226 IORING_OP_FADVISE,227 IORING_OP_MADVISE,228 IORING_OP_SEND,229 IORING_OP_RECV,230 IORING_OP_OPENAT2,231 IORING_OP_EPOLL_CTL,232 IORING_OP_SPLICE,233 IORING_OP_PROVIDE_BUFFERS,234 IORING_OP_REMOVE_BUFFERS,235 IORING_OP_TEE,236 IORING_OP_SHUTDOWN,237 IORING_OP_RENAMEAT,238 IORING_OP_UNLINKAT,239 IORING_OP_MKDIRAT,240 IORING_OP_SYMLINKAT,241 IORING_OP_LINKAT,242 IORING_OP_MSG_RING,243 IORING_OP_FSETXATTR,244 IORING_OP_SETXATTR,245 IORING_OP_FGETXATTR,246 IORING_OP_GETXATTR,247 IORING_OP_SOCKET,248 IORING_OP_URING_CMD,249 IORING_OP_SEND_ZC,250 IORING_OP_SENDMSG_ZC,251 IORING_OP_READ_MULTISHOT,252 IORING_OP_WAITID,253 IORING_OP_FUTEX_WAIT,254 IORING_OP_FUTEX_WAKE,255 IORING_OP_FUTEX_WAITV,256 257 /* this goes last, obviously */258 IORING_OP_LAST,259};260 261/*262 * sqe->uring_cmd_flags top 8bits aren't available for userspace263 * IORING_URING_CMD_FIXED use registered buffer; pass this flag264 * along with setting sqe->buf_index.265 */266#define IORING_URING_CMD_FIXED (1U << 0)267#define IORING_URING_CMD_MASK IORING_URING_CMD_FIXED268 269 270/*271 * sqe->fsync_flags272 */273#define IORING_FSYNC_DATASYNC (1U << 0)274 275/*276 * sqe->timeout_flags277 */278#define IORING_TIMEOUT_ABS (1U << 0)279#define IORING_TIMEOUT_UPDATE (1U << 1)280#define IORING_TIMEOUT_BOOTTIME (1U << 2)281#define IORING_TIMEOUT_REALTIME (1U << 3)282#define IORING_LINK_TIMEOUT_UPDATE (1U << 4)283#define IORING_TIMEOUT_ETIME_SUCCESS (1U << 5)284#define IORING_TIMEOUT_MULTISHOT (1U << 6)285#define IORING_TIMEOUT_CLOCK_MASK (IORING_TIMEOUT_BOOTTIME | IORING_TIMEOUT_REALTIME)286#define IORING_TIMEOUT_UPDATE_MASK (IORING_TIMEOUT_UPDATE | IORING_LINK_TIMEOUT_UPDATE)287/*288 * sqe->splice_flags289 * extends splice(2) flags290 */291#define SPLICE_F_FD_IN_FIXED (1U << 31) /* the last bit of __u32 */292 293/*294 * POLL_ADD flags. Note that since sqe->poll_events is the flag space, the295 * command flags for POLL_ADD are stored in sqe->len.296 *297 * IORING_POLL_ADD_MULTI Multishot poll. Sets IORING_CQE_F_MORE if298 * the poll handler will continue to report299 * CQEs on behalf of the same SQE.300 *301 * IORING_POLL_UPDATE Update existing poll request, matching302 * sqe->addr as the old user_data field.303 *304 * IORING_POLL_LEVEL Level triggered poll.305 */306#define IORING_POLL_ADD_MULTI (1U << 0)307#define IORING_POLL_UPDATE_EVENTS (1U << 1)308#define IORING_POLL_UPDATE_USER_DATA (1U << 2)309#define IORING_POLL_ADD_LEVEL (1U << 3)310 311/*312 * ASYNC_CANCEL flags.313 *314 * IORING_ASYNC_CANCEL_ALL Cancel all requests that match the given key315 * IORING_ASYNC_CANCEL_FD Key off 'fd' for cancelation rather than the316 * request 'user_data'317 * IORING_ASYNC_CANCEL_ANY Match any request318 * IORING_ASYNC_CANCEL_FD_FIXED 'fd' passed in is a fixed descriptor319 * IORING_ASYNC_CANCEL_USERDATA Match on user_data, default for no other key320 * IORING_ASYNC_CANCEL_OP Match request based on opcode321 */322#define IORING_ASYNC_CANCEL_ALL (1U << 0)323#define IORING_ASYNC_CANCEL_FD (1U << 1)324#define IORING_ASYNC_CANCEL_ANY (1U << 2)325#define IORING_ASYNC_CANCEL_FD_FIXED (1U << 3)326#define IORING_ASYNC_CANCEL_USERDATA (1U << 4)327#define IORING_ASYNC_CANCEL_OP (1U << 5)328 329/*330 * send/sendmsg and recv/recvmsg flags (sqe->ioprio)331 *332 * IORING_RECVSEND_POLL_FIRST If set, instead of first attempting to send333 * or receive and arm poll if that yields an334 * -EAGAIN result, arm poll upfront and skip335 * the initial transfer attempt.336 *337 * IORING_RECV_MULTISHOT Multishot recv. Sets IORING_CQE_F_MORE if338 * the handler will continue to report339 * CQEs on behalf of the same SQE.340 *341 * IORING_RECVSEND_FIXED_BUF Use registered buffers, the index is stored in342 * the buf_index field.343 *344 * IORING_SEND_ZC_REPORT_USAGE345 * If set, SEND[MSG]_ZC should report346 * the zerocopy usage in cqe.res347 * for the IORING_CQE_F_NOTIF cqe.348 * 0 is reported if zerocopy was actually possible.349 * IORING_NOTIF_USAGE_ZC_COPIED if data was copied350 * (at least partially).351 */352#define IORING_RECVSEND_POLL_FIRST (1U << 0)353#define IORING_RECV_MULTISHOT (1U << 1)354#define IORING_RECVSEND_FIXED_BUF (1U << 2)355#define IORING_SEND_ZC_REPORT_USAGE (1U << 3)356 357/*358 * cqe.res for IORING_CQE_F_NOTIF if359 * IORING_SEND_ZC_REPORT_USAGE was requested360 *361 * It should be treated as a flag, all other362 * bits of cqe.res should be treated as reserved!363 */364#define IORING_NOTIF_USAGE_ZC_COPIED (1U << 31)365 366/*367 * accept flags stored in sqe->ioprio368 */369#define IORING_ACCEPT_MULTISHOT (1U << 0)370 371/*372 * IORING_OP_MSG_RING command types, stored in sqe->addr373 */374enum {375 IORING_MSG_DATA, /* pass sqe->len as 'res' and off as user_data */376 IORING_MSG_SEND_FD, /* send a registered fd to another ring */377};378 379/*380 * IORING_OP_MSG_RING flags (sqe->msg_ring_flags)381 *382 * IORING_MSG_RING_CQE_SKIP Don't post a CQE to the target ring. Not383 * applicable for IORING_MSG_DATA, obviously.384 */385#define IORING_MSG_RING_CQE_SKIP (1U << 0)386/* Pass through the flags from sqe->file_index to cqe->flags */387#define IORING_MSG_RING_FLAGS_PASS (1U << 1)388 389/*390 * IO completion data structure (Completion Queue Entry)391 */392struct io_uring_cqe {393 __u64 user_data; /* sqe->data submission passed back */394 __s32 res; /* result code for this event */395 __u32 flags;396 397 /*398 * If the ring is initialized with IORING_SETUP_CQE32, then this field399 * contains 16-bytes of padding, doubling the size of the CQE.400 */401 __u64 big_cqe[];402};403 404/*405 * cqe->flags406 *407 * IORING_CQE_F_BUFFER If set, the upper 16 bits are the buffer ID408 * IORING_CQE_F_MORE If set, parent SQE will generate more CQE entries409 * IORING_CQE_F_SOCK_NONEMPTY If set, more data to read after socket recv410 * IORING_CQE_F_NOTIF Set for notification CQEs. Can be used to distinct411 * them from sends.412 */413#define IORING_CQE_F_BUFFER (1U << 0)414#define IORING_CQE_F_MORE (1U << 1)415#define IORING_CQE_F_SOCK_NONEMPTY (1U << 2)416#define IORING_CQE_F_NOTIF (1U << 3)417 418enum {419 IORING_CQE_BUFFER_SHIFT = 16,420};421 422/*423 * Magic offsets for the application to mmap the data it needs424 */425#define IORING_OFF_SQ_RING 0ULL426#define IORING_OFF_CQ_RING 0x8000000ULL427#define IORING_OFF_SQES 0x10000000ULL428#define IORING_OFF_PBUF_RING 0x80000000ULL429#define IORING_OFF_PBUF_SHIFT 16430#define IORING_OFF_MMAP_MASK 0xf8000000ULL431 432/*433 * Filled with the offset for mmap(2)434 */435struct io_sqring_offsets {436 __u32 head;437 __u32 tail;438 __u32 ring_mask;439 __u32 ring_entries;440 __u32 flags;441 __u32 dropped;442 __u32 array;443 __u32 resv1;444 __u64 user_addr;445};446 447/*448 * sq_ring->flags449 */450#define IORING_SQ_NEED_WAKEUP (1U << 0) /* needs io_uring_enter wakeup */451#define IORING_SQ_CQ_OVERFLOW (1U << 1) /* CQ ring is overflown */452#define IORING_SQ_TASKRUN (1U << 2) /* task should enter the kernel */453 454struct io_cqring_offsets {455 __u32 head;456 __u32 tail;457 __u32 ring_mask;458 __u32 ring_entries;459 __u32 overflow;460 __u32 cqes;461 __u32 flags;462 __u32 resv1;463 __u64 user_addr;464};465 466/*467 * cq_ring->flags468 */469 470/* disable eventfd notifications */471#define IORING_CQ_EVENTFD_DISABLED (1U << 0)472 473/*474 * io_uring_enter(2) flags475 */476#define IORING_ENTER_GETEVENTS (1U << 0)477#define IORING_ENTER_SQ_WAKEUP (1U << 1)478#define IORING_ENTER_SQ_WAIT (1U << 2)479#define IORING_ENTER_EXT_ARG (1U << 3)480#define IORING_ENTER_REGISTERED_RING (1U << 4)481 482/*483 * Passed in for io_uring_setup(2). Copied back with updated info on success484 */485struct io_uring_params {486 __u32 sq_entries;487 __u32 cq_entries;488 __u32 flags;489 __u32 sq_thread_cpu;490 __u32 sq_thread_idle;491 __u32 features;492 __u32 wq_fd;493 __u32 resv[3];494 struct io_sqring_offsets sq_off;495 struct io_cqring_offsets cq_off;496};497 498/*499 * io_uring_params->features flags500 */501#define IORING_FEAT_SINGLE_MMAP (1U << 0)502#define IORING_FEAT_NODROP (1U << 1)503#define IORING_FEAT_SUBMIT_STABLE (1U << 2)504#define IORING_FEAT_RW_CUR_POS (1U << 3)505#define IORING_FEAT_CUR_PERSONALITY (1U << 4)506#define IORING_FEAT_FAST_POLL (1U << 5)507#define IORING_FEAT_POLL_32BITS (1U << 6)508#define IORING_FEAT_SQPOLL_NONFIXED (1U << 7)509#define IORING_FEAT_EXT_ARG (1U << 8)510#define IORING_FEAT_NATIVE_WORKERS (1U << 9)511#define IORING_FEAT_RSRC_TAGS (1U << 10)512#define IORING_FEAT_CQE_SKIP (1U << 11)513#define IORING_FEAT_LINKED_FILE (1U << 12)514#define IORING_FEAT_REG_REG_RING (1U << 13)515 516/*517 * io_uring_register(2) opcodes and arguments518 */519enum {520 IORING_REGISTER_BUFFERS = 0,521 IORING_UNREGISTER_BUFFERS = 1,522 IORING_REGISTER_FILES = 2,523 IORING_UNREGISTER_FILES = 3,524 IORING_REGISTER_EVENTFD = 4,525 IORING_UNREGISTER_EVENTFD = 5,526 IORING_REGISTER_FILES_UPDATE = 6,527 IORING_REGISTER_EVENTFD_ASYNC = 7,528 IORING_REGISTER_PROBE = 8,529 IORING_REGISTER_PERSONALITY = 9,530 IORING_UNREGISTER_PERSONALITY = 10,531 IORING_REGISTER_RESTRICTIONS = 11,532 IORING_REGISTER_ENABLE_RINGS = 12,533 534 /* extended with tagging */535 IORING_REGISTER_FILES2 = 13,536 IORING_REGISTER_FILES_UPDATE2 = 14,537 IORING_REGISTER_BUFFERS2 = 15,538 IORING_REGISTER_BUFFERS_UPDATE = 16,539 540 /* set/clear io-wq thread affinities */541 IORING_REGISTER_IOWQ_AFF = 17,542 IORING_UNREGISTER_IOWQ_AFF = 18,543 544 /* set/get max number of io-wq workers */545 IORING_REGISTER_IOWQ_MAX_WORKERS = 19,546 547 /* register/unregister io_uring fd with the ring */548 IORING_REGISTER_RING_FDS = 20,549 IORING_UNREGISTER_RING_FDS = 21,550 551 /* register ring based provide buffer group */552 IORING_REGISTER_PBUF_RING = 22,553 IORING_UNREGISTER_PBUF_RING = 23,554 555 /* sync cancelation API */556 IORING_REGISTER_SYNC_CANCEL = 24,557 558 /* register a range of fixed file slots for automatic slot allocation */559 IORING_REGISTER_FILE_ALLOC_RANGE = 25,560 561 /* this goes last */562 IORING_REGISTER_LAST,563 564 /* flag added to the opcode to use a registered ring fd */565 IORING_REGISTER_USE_REGISTERED_RING = 1U << 31566};567 568/* io-wq worker categories */569enum {570 IO_WQ_BOUND,571 IO_WQ_UNBOUND,572};573 574/* deprecated, see struct io_uring_rsrc_update */575struct io_uring_files_update {576 __u32 offset;577 __u32 resv;578 __aligned_u64 /* __s32 * */ fds;579};580 581/*582 * Register a fully sparse file space, rather than pass in an array of all583 * -1 file descriptors.584 */585#define IORING_RSRC_REGISTER_SPARSE (1U << 0)586 587struct io_uring_rsrc_register {588 __u32 nr;589 __u32 flags;590 __u64 resv2;591 __aligned_u64 data;592 __aligned_u64 tags;593};594 595struct io_uring_rsrc_update {596 __u32 offset;597 __u32 resv;598 __aligned_u64 data;599};600 601struct io_uring_rsrc_update2 {602 __u32 offset;603 __u32 resv;604 __aligned_u64 data;605 __aligned_u64 tags;606 __u32 nr;607 __u32 resv2;608};609 610/* Skip updating fd indexes set to this value in the fd table */611#define IORING_REGISTER_FILES_SKIP (-2)612 613#define IO_URING_OP_SUPPORTED (1U << 0)614 615struct io_uring_probe_op {616 __u8 op;617 __u8 resv;618 __u16 flags; /* IO_URING_OP_* flags */619 __u32 resv2;620};621 622struct io_uring_probe {623 __u8 last_op; /* last opcode supported */624 __u8 ops_len; /* length of ops[] array below */625 __u16 resv;626 __u32 resv2[3];627 struct io_uring_probe_op ops[];628};629 630struct io_uring_restriction {631 __u16 opcode;632 union {633 __u8 register_op; /* IORING_RESTRICTION_REGISTER_OP */634 __u8 sqe_op; /* IORING_RESTRICTION_SQE_OP */635 __u8 sqe_flags; /* IORING_RESTRICTION_SQE_FLAGS_* */636 };637 __u8 resv;638 __u32 resv2[3];639};640 641struct io_uring_buf {642 __u64 addr;643 __u32 len;644 __u16 bid;645 __u16 resv;646};647 648struct io_uring_buf_ring {649 union {650 /*651 * To avoid spilling into more pages than we need to, the652 * ring tail is overlaid with the io_uring_buf->resv field.653 */654 struct {655 __u64 resv1;656 __u32 resv2;657 __u16 resv3;658 __u16 tail;659 };660 __DECLARE_FLEX_ARRAY(struct io_uring_buf, bufs);661 };662};663 664/*665 * Flags for IORING_REGISTER_PBUF_RING.666 *667 * IOU_PBUF_RING_MMAP: If set, kernel will allocate the memory for the ring.668 * The application must not set a ring_addr in struct669 * io_uring_buf_reg, instead it must subsequently call670 * mmap(2) with the offset set as:671 * IORING_OFF_PBUF_RING | (bgid << IORING_OFF_PBUF_SHIFT)672 * to get a virtual mapping for the ring.673 */674enum {675 IOU_PBUF_RING_MMAP = 1,676};677 678/* argument for IORING_(UN)REGISTER_PBUF_RING */679struct io_uring_buf_reg {680 __u64 ring_addr;681 __u32 ring_entries;682 __u16 bgid;683 __u16 flags;684 __u64 resv[3];685};686 687/*688 * io_uring_restriction->opcode values689 */690enum {691 /* Allow an io_uring_register(2) opcode */692 IORING_RESTRICTION_REGISTER_OP = 0,693 694 /* Allow an sqe opcode */695 IORING_RESTRICTION_SQE_OP = 1,696 697 /* Allow sqe flags */698 IORING_RESTRICTION_SQE_FLAGS_ALLOWED = 2,699 700 /* Require sqe flags (these flags must be set on each submission) */701 IORING_RESTRICTION_SQE_FLAGS_REQUIRED = 3,702 703 IORING_RESTRICTION_LAST704};705 706struct io_uring_getevents_arg {707 __u64 sigmask;708 __u32 sigmask_sz;709 __u32 pad;710 __u64 ts;711};712 713/*714 * Argument for IORING_REGISTER_SYNC_CANCEL715 */716struct io_uring_sync_cancel_reg {717 __u64 addr;718 __s32 fd;719 __u32 flags;720 struct __kernel_timespec timeout;721 __u8 opcode;722 __u8 pad[7];723 __u64 pad2[3];724};725 726/*727 * Argument for IORING_REGISTER_FILE_ALLOC_RANGE728 * The range is specified as [off, off + len)729 */730struct io_uring_file_index_range {731 __u32 off;732 __u32 len;733 __u64 resv;734};735 736struct io_uring_recvmsg_out {737 __u32 namelen;738 __u32 controllen;739 __u32 payloadlen;740 __u32 flags;741};742 743/*744 * Argument for IORING_OP_URING_CMD when file is a socket745 */746enum {747 SOCKET_URING_OP_SIOCINQ = 0,748 SOCKET_URING_OP_SIOCOUTQ,749 SOCKET_URING_OP_GETSOCKOPT,750 SOCKET_URING_OP_SETSOCKOPT,751};752 753#ifdef __cplusplus754}755#endif756 757#endif758