diff options
Diffstat (limited to 'src/io_uring.h')
-rw-r--r-- | src/io_uring.h | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/src/io_uring.h b/src/io_uring.h deleted file mode 100644 index a61c4a6..0000000 --- a/src/io_uring.h +++ /dev/null @@ -1,146 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -/* - * Header file for the io_uring interface. - * - * Copyright (C) 2019 Jens Axboe - * Copyright (C) 2019 Christoph Hellwig - */ -#ifndef LINUX_IO_URING_H -#define LINUX_IO_URING_H - -#include <linux/fs.h> -#include <linux/types.h> - -/* - * IO submission data structure (Submission Queue Entry) - */ -struct io_uring_sqe { - __u8 opcode; /* type of operation for this sqe */ - __u8 flags; /* IOSQE_ flags */ - __u16 ioprio; /* ioprio for the request */ - __s32 fd; /* file descriptor to do IO on */ - __u64 off; /* offset into file */ - __u64 addr; /* pointer to buffer or iovecs */ - __u32 len; /* buffer size or number of iovecs */ - union { - __kernel_rwf_t rw_flags; - __u32 fsync_flags; - __u16 poll_events; - __u32 sync_range_flags; - __u32 msg_flags; - }; - __u64 user_data; /* data to be passed back at completion time */ - union { - __u16 buf_index; /* index into fixed buffers, if used */ - __u64 __pad2[3]; - }; -}; - -/* - * sqe->flags - */ -#define IOSQE_FIXED_FILE (1U << 0) /* use fixed fileset */ -#define IOSQE_IO_DRAIN (1U << 1) /* issue after inflight IO */ -#define IOSQE_IO_LINK (1U << 2) /* next IO depends on this one */ - -/* - * io_uring_setup() flags - */ -#define IORING_SETUP_IOPOLL (1U << 0) /* io_context is polled */ -#define IORING_SETUP_SQPOLL (1U << 1) /* SQ poll thread */ -#define IORING_SETUP_SQ_AFF (1U << 2) /* sq_thread_cpu is valid */ - -#define IORING_OP_NOP 0 -#define IORING_OP_READV 1 -#define IORING_OP_WRITEV 2 -#define IORING_OP_FSYNC 3 -#define IORING_OP_READ_FIXED 4 -#define IORING_OP_WRITE_FIXED 5 -#define IORING_OP_POLL_ADD 6 -#define IORING_OP_POLL_REMOVE 7 -#define IORING_OP_SYNC_FILE_RANGE 8 -#define IORING_OP_SENDMSG 9 -#define IORING_OP_RECVMSG 10 - -/* - * sqe->fsync_flags - */ -#define IORING_FSYNC_DATASYNC (1U << 0) - -/* - * IO completion data structure (Completion Queue Entry) - */ -struct io_uring_cqe { - __u64 user_data; /* sqe->data submission passed back */ - __s32 res; /* result code for this event */ - __u32 flags; -}; - -/* - * Magic offsets for the application to mmap the data it needs - */ -#define IORING_OFF_SQ_RING 0ULL -#define IORING_OFF_CQ_RING 0x8000000ULL -#define IORING_OFF_SQES 0x10000000ULL - -/* - * Filled with the offset for mmap(2) - */ -struct io_sqring_offsets { - __u32 head; - __u32 tail; - __u32 ring_mask; - __u32 ring_entries; - __u32 flags; - __u32 dropped; - __u32 array; - __u32 resv1; - __u64 resv2; -}; - -/* - * sq_ring->flags - */ -#define IORING_SQ_NEED_WAKEUP (1U << 0) /* needs io_uring_enter wakeup */ - -struct io_cqring_offsets { - __u32 head; - __u32 tail; - __u32 ring_mask; - __u32 ring_entries; - __u32 overflow; - __u32 cqes; - __u64 resv[2]; -}; - -/* - * io_uring_enter(2) flags - */ -#define IORING_ENTER_GETEVENTS (1U << 0) -#define IORING_ENTER_SQ_WAKEUP (1U << 1) - -/* - * Passed in for io_uring_setup(2). Copied back with updated info on success - */ -struct io_uring_params { - __u32 sq_entries; - __u32 cq_entries; - __u32 flags; - __u32 sq_thread_cpu; - __u32 sq_thread_idle; - __u32 resv[5]; - struct io_sqring_offsets sq_off; - struct io_cqring_offsets cq_off; -}; - -/* - * io_uring_register(2) opcodes and arguments - */ -#define IORING_REGISTER_BUFFERS 0 -#define IORING_UNREGISTER_BUFFERS 1 -#define IORING_REGISTER_FILES 2 -#define IORING_UNREGISTER_FILES 3 -#define IORING_REGISTER_EVENTFD 4 -#define IORING_UNREGISTER_EVENTFD 5 - -#endif |