mirror of
https://github.com/ii64/gouring.git
synced 2024-11-21 22:46:22 +01:00
Nugraha
7eedf9754b
There's other adjustment/addition: * Function name CQE/SQE renamed to Cqe/Sqe. * SQ entry union sets value withput util to reduce function complexity, so leaving function budget for another stuff. * UserData has its own type, implement for uint64, uintptr, and unsafe. * TODO: decide what to use `Syscall` or `RawSyscall`. * Exposed `SeenCqe`. * Ignore *.test file extension. * Inline cost tool. Signed-off-by: Nugraha <richiisei@gmail.com>
635 lines
16 KiB
Go
635 lines
16 KiB
Go
/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
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/*
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* Header file for the io_uring interface.
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*
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* Copyright (C) 2019 Jens Axboe
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* Copyright (C) 2019 Christoph Hellwig
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*/
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package gouring
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import "unsafe"
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/*
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* IO submission data structure (Submission Queue Entry)
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*/
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type IoUringSqe_Union1 uint64
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func (u *IoUringSqe_Union1) SetOffset(v uint64) { *u = IoUringSqe_Union1(v) }
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func (u *IoUringSqe_Union1) SetAddr2(v uint64) { *u = IoUringSqe_Union1(v) }
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type IoUringSqe_Union2 uint64
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func (u *IoUringSqe_Union2) SetAddr_Value(v uint64) { *u = IoUringSqe_Union2(v) }
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func (u *IoUringSqe_Union2) SetAddr(v unsafe.Pointer) { *u = IoUringSqe_Union2((uintptr)(v)) }
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func (u *IoUringSqe_Union2) SetSpliceOffsetIn(v uint64) { *u = IoUringSqe_Union2(v) }
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type IoUringSqe_Union3 uint32
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func (u *IoUringSqe_Union3) SetRwFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetPollEvents(v uint16) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetPoll32Events(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetSyncRangeFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetMsgFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetTimeoutFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetAcceptFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetCancelFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetOpenFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetStatxFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetFadviseAdvice(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetSpliceFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetRenameFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetUnlinkFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetHardlinkFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetXattrFlags(v uint32) { *u = IoUringSqe_Union3(v) }
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func (u *IoUringSqe_Union3) SetOpFlags(v uint32) { *u = IoUringSqe_Union3(v) } //generic
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func (u IoUringSqe_Union3) GetOpFlags() uint32 { return uint32(u) } //generic
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type IoUringSqe_Union4 uint16
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func (u *IoUringSqe_Union4) SetBufIndex(v uint16) { *u = IoUringSqe_Union4(v) }
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func (u *IoUringSqe_Union4) SetBufGroup(v uint16) { *u = IoUringSqe_Union4(v) }
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type IoUringSqe_Union5 uint32
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func (u *IoUringSqe_Union5) SetSpliceFdIn(v int32) { *u = IoUringSqe_Union5(v) }
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func (u *IoUringSqe_Union5) SetFileIndex(v uint32) { *u = IoUringSqe_Union5(v) }
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type IoUringSqe struct {
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Opcode IoUringOp /* type of operation for this sqe */
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Flags uint8 /* IOSQE_ flags */
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IoPrio uint16 /* ioprio for the request */
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Fd int32 /* file descriptor to do IO on */
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// union {
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// __u64 off; /* offset into file */
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// __u64 addr2;
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// };
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IoUringSqe_Union1
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// union {
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// __u64 addr; /* pointer to buffer or iovecs */
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// __u64 splice_off_in;
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// };
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IoUringSqe_Union2
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Len uint32 /* buffer size or number of iovecs */
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// union {
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// __kernel_rwf_t rw_flags;
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// __u32 fsync_flags;
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// __u16 poll_events; /* compatibility */
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// __u32 poll32_events; /* word-reversed for BE */
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// __u32 sync_range_flags;
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// __u32 msg_flags;
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// __u32 timeout_flags;
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// __u32 accept_flags;
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// __u32 cancel_flags;
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// __u32 open_flags;
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// __u32 statx_flags;
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// __u32 fadvise_advice;
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// __u32 splice_flags;
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// __u32 rename_flags;
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// __u32 unlink_flags;
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// __u32 hardlink_flags;
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// __u32 xattr_flags;
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// };
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IoUringSqe_Union3
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UserData UserData /* data to be passed back at completion time */
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/* pack this to avoid bogus arm OABI complaints */
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// union {
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// /* index into fixed buffers, if used */
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// __u16 buf_index;
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// /* for grouped buffer selection */
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// __u16 buf_group;
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// } __attribute__((packed));
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IoUringSqe_Union4
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/* personality to use, if used */
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Personality uint16
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// union {
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// __s32 splice_fd_in;
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// __u32 file_index;
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// };
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IoUringSqe_Union5
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Addr3 uint64
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__pad2 [1]uint64
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}
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/*
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* If sqe->file_index is set to this for opcodes that instantiate a new
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* direct descriptor (like openat/openat2/accept), then io_uring will allocate
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* an available direct descriptor instead of having the application pass one
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* in. The picked direct descriptor will be returned in cqe->res, or -ENFILE
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* if the space is full.
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*/
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const IORING_FILE_INDEX_ALLOC = ^uint32(0)
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const (
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IOSQE_FIXED_FILE_BIT = iota
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IOSQE_IO_DRAIN_BIT
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IOSQE_IO_LINK_BIT
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IOSQE_IO_HARDLINK_BIT
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IOSQE_ASYNC_BIT
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IOSQE_BUFFER_SELECT_BIT
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IOSQE_CQE_SKIP_SUCCESS_BIT
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)
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/*
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* sqe->flags
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*/
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const (
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/* use fixed fileset */
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IOSQE_FIXED_FILE = (1 << IOSQE_FIXED_FILE_BIT)
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/* issue after inflight IO */
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IOSQE_IO_DRAIN = (1 << IOSQE_IO_DRAIN_BIT)
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/* links next sqe */
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IOSQE_IO_LINK = (1 << IOSQE_IO_LINK_BIT)
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/* like LINK, but stronger */
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IOSQE_IO_HARDLINK = (1 << IOSQE_IO_HARDLINK_BIT)
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/* always go async */
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IOSQE_ASYNC = (1 << IOSQE_ASYNC_BIT)
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/* select buffer from sqe->buf_group */
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IOSQE_BUFFER_SELECT = (1 << IOSQE_BUFFER_SELECT_BIT)
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/* don't post CQE if request succeeded */
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IOSQE_CQE_SKIP_SUCCESS = (1 << IOSQE_CQE_SKIP_SUCCESS_BIT)
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)
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/*
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* io_uring_setup() flags
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*/
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const (
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IORING_SETUP_IOPOLL = (1 << 0) /* io_context is polled */
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IORING_SETUP_SQPOLL = (1 << 1) /* SQ poll thread */
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IORING_SETUP_SQ_AFF = (1 << 2) /* sq_thread_cpu is valid */
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IORING_SETUP_CQSIZE = (1 << 3) /* app defines CQ size */
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IORING_SETUP_CLAMP = (1 << 4) /* clamp SQ/CQ ring sizes */
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IORING_SETUP_ATTACH_WQ = (1 << 5) /* attach to existing wq */
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IORING_SETUP_R_DISABLED = (1 << 6) /* start with ring disabled */
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IORING_SETUP_SUBMIT_ALL = (1 << 7) /* continue submit on error */
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)
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/*
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* Cooperative task running. When requests complete, they often require
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* forcing the submitter to transition to the kernel to complete. If this
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* flag is set, work will be done when the task transitions anyway, rather
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* than force an inter-processor interrupt reschedule. This avoids interrupting
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* a task running in userspace, and saves an IPI.
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*/
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const IORING_SETUP_COOP_TASKRUN = (1 << 8)
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/*
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* If COOP_TASKRUN is set, get notified if task work is available for
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* running and a kernel transition would be needed to run it. This sets
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* IORING_SQ_TASKRUN in the sq ring flags. Not valid with COOP_TASKRUN.
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*/
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const IORING_SETUP_TASKRUN_FLAG = (1 << 9)
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const IORING_SETUP_SQE128 = (1 << 10) /* SQEs are 128 byte */
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const IORING_SETUP_CQE32 = (1 << 11) /* CQEs are 32 byte */
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type IoUringOp = uint8
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//go:generate stringerx -type=IoUringOp
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const (
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IORING_OP_NOP IoUringOp = iota
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IORING_OP_READV
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IORING_OP_WRITEV
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IORING_OP_FSYNC
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IORING_OP_READ_FIXED
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IORING_OP_WRITE_FIXED
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IORING_OP_POLL_ADD
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IORING_OP_POLL_REMOVE
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IORING_OP_SYNC_FILE_RANGE
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IORING_OP_SENDMSG
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IORING_OP_RECVMSG
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IORING_OP_TIMEOUT
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IORING_OP_TIMEOUT_REMOVE
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IORING_OP_ACCEPT
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IORING_OP_ASYNC_CANCEL
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IORING_OP_LINK_TIMEOUT
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IORING_OP_CONNECT
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IORING_OP_FALLOCATE
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IORING_OP_OPENAT
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IORING_OP_CLOSE
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IORING_OP_FILES_UPDATE
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IORING_OP_STATX
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IORING_OP_READ
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IORING_OP_WRITE
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IORING_OP_FADVISE
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IORING_OP_MADVISE
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IORING_OP_SEND
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IORING_OP_RECV
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IORING_OP_OPENAT2
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IORING_OP_EPOLL_CTL
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IORING_OP_SPLICE
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IORING_OP_PROVIDE_BUFFERS
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IORING_OP_REMOVE_BUFFERS
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IORING_OP_TEE
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IORING_OP_SHUTDOWN
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IORING_OP_RENAMEAT
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IORING_OP_UNLINKAT
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IORING_OP_MKDIRAT
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IORING_OP_SYMLINKAT
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IORING_OP_LINKAT
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IORING_OP_MSG_RING
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IORING_OP_FSETXATTR
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IORING_OP_SETXATTR
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IORING_OP_FGETXATTR
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IORING_OP_GETXATTR
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IORING_OP_SOCKET
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IORING_OP_URING_CMD
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/* this goes last, obviously */
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IORING_OP_LAST
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)
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/*
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* sqe->fsync_flags
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*/
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const IORING_FSYNC_DATASYNC = (1 << 0)
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/*
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* sqe->timeout_flags
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*/
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const (
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IORING_TIMEOUT_ABS = (1 << 0)
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IORING_TIMEOUT_UPDATE = (1 << 1)
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IORING_TIMEOUT_BOOTTIME = (1 << 2)
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IORING_TIMEOUT_REALTIME = (1 << 3)
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IORING_LINK_TIMEOUT_UPDATE = (1 << 4)
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IORING_TIMEOUT_ETIME_SUCCESS = (1 << 5)
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IORING_TIMEOUT_CLOCK_MASK = (IORING_TIMEOUT_BOOTTIME | IORING_TIMEOUT_REALTIME)
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IORING_TIMEOUT_UPDATE_MASK = (IORING_TIMEOUT_UPDATE | IORING_LINK_TIMEOUT_UPDATE)
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)
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/*
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* sqe->splice_flags
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* extends splice(2) flags
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*/
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const SPLICE_F_FD_IN_FIXED = (1 << 31) /* the last bit of __u32 */
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/*
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* POLL_ADD flags. Note that since sqe->poll_events is the flag space, the
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* command flags for POLL_ADD are stored in sqe->len.
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*
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* IORING_POLL_ADD_MULTI Multishot poll. Sets IORING_CQE_F_MORE if
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* the poll handler will continue to report
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* CQEs on behalf of the same SQE.
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*
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* IORING_POLL_UPDATE Update existing poll request, matching
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* sqe->addr as the old user_data field.
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*/
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const (
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IORING_POLL_ADD_MULTI = (1 << 0)
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IORING_POLL_UPDATE_EVENTS = (1 << 1)
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IORING_POLL_UPDATE_USER_DATA = (1 << 2)
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)
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/*
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* ASYNC_CANCEL flags.
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*
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* IORING_ASYNC_CANCEL_ALL Cancel all requests that match the given key
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* IORING_ASYNC_CANCEL_FD Key off 'fd' for cancelation rather than the
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* request 'user_data'
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* IORING_ASYNC_CANCEL_ANY Match any request
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*/
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const (
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IORING_ASYNC_CANCEL_ALL = (1 << 0)
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IORING_ASYNC_CANCEL_FD = (1 << 1)
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IORING_ASYNC_CANCEL_ANY = (1 << 2)
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)
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/*
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* send/sendmsg and recv/recvmsg flags (sqe->addr2)
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*
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* IORING_RECVSEND_POLL_FIRST If set, instead of first attempting to send
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* or receive and arm poll if that yields an
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* -EAGAIN result, arm poll upfront and skip
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* the initial transfer attempt.
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*/
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const IORING_RECVSEND_POLL_FIRST = (1 << 0)
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/*
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* accept flags stored in sqe->ioprio
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*/
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const IORING_ACCEPT_MULTISHOT = (1 << 0)
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/*
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* IO completion data structure (Completion Queue Entry)
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*/
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type IoUringCqe struct {
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UserData UserData /* sqe->data submission passed back */
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Res int32 /* result code for this event */
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Flags uint32
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/*
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* If the ring is initialized with IORING_SETUP_CQE32, then this field
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* contains 16-bytes of padding, doubling the size of the CQE.
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*/
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// __u64 big_cqe[];
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// 8+4+4 == 16 , correct
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}
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/*
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* cqe->flags
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*
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* IORING_CQE_F_BUFFER If set, the upper 16 bits are the buffer ID
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* IORING_CQE_F_MORE If set, parent SQE will generate more CQE entries
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* IORING_CQE_F_SOCK_NONEMPTY If set, more data to read after socket recv
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*/
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const (
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IORING_CQE_F_BUFFER = (1 << 0)
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IORING_CQE_F_MORE = (1 << 1)
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IORING_CQE_F_SOCK_NONEMPTY = (1 << 2)
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)
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const (
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IORING_CQE_BUFFER_SHIFT = 16
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)
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/*
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* Magic offsets for the application to mmap the data it needs
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*/
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const (
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IORING_OFF_SQ_RING = 0
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IORING_OFF_CQ_RING = 0x8000000
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IORING_OFF_SQES = 0x10000000
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)
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/*
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* Filled with the offset for mmap(2)
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*/
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type IoSqringOffsets struct {
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Head uint32
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Tail uint32
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RingMask uint32
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RingEntries uint32
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Flags uint32
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Dropped uint32
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Array uint32
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resv1 uint32
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resv2 uint64
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}
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/*
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* sq_ring->flags
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*/
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const (
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IORING_SQ_NEED_WAKEUP = (1 << 0) /* needs io_uring_enter wakeup */
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IORING_SQ_CQ_OVERFLOW = (1 << 1) /* CQ ring is overflown */
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IORING_SQ_TASKRUN = (1 << 2) /* task should enter the kernel */
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)
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type IoCqringOffsets struct {
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Head uint32
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Tail uint32
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RingMask uint32
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RingEntries uint32
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Overflow uint32
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Cqes uint32
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Flags uint32
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resv1 uint32
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resv2 uint64
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}
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/*
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* cq_ring->flags
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*/
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/* disable eventfd notifications */
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const IORING_CQ_EVENTFD_DISABLED = (1 << 0)
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/*
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* io_uring_enter(2) flags
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*/
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const (
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IORING_ENTER_GETEVENTS = (1 << 0)
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IORING_ENTER_SQ_WAKEUP = (1 << 1)
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IORING_ENTER_SQ_WAIT = (1 << 2)
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IORING_ENTER_EXT_ARG = (1 << 3)
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IORING_ENTER_REGISTERED_RING = (1 << 4)
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)
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/*
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* Passed in for io_uring_setup(2). Copied back with updated info on success
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*/
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type IoUringParams struct {
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SqEntries uint32
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CqEntries uint32
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Flags uint32
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SqThreadCpu uint32
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SqThreadIdle uint32
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Features uint32
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WqFd uint32
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resv [3]uint32
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SqOff IoSqringOffsets
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CqOff IoCqringOffsets
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}
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/*
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* io_uring_params->features flags
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*/
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const (
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IORING_FEAT_SINGLE_MMAP = (1 << 0)
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IORING_FEAT_NODROP = (1 << 1)
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IORING_FEAT_SUBMIT_STABLE = (1 << 2)
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IORING_FEAT_RW_CUR_POS = (1 << 3)
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IORING_FEAT_CUR_PERSONALITY = (1 << 4)
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IORING_FEAT_FAST_POLL = (1 << 5)
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IORING_FEAT_POLL_32BITS = (1 << 6)
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IORING_FEAT_SQPOLL_NONFIXED = (1 << 7)
|
|
IORING_FEAT_EXT_ARG = (1 << 8)
|
|
IORING_FEAT_NATIVE_WORKERS = (1 << 9)
|
|
IORING_FEAT_RSRC_TAGS = (1 << 10)
|
|
IORING_FEAT_CQE_SKIP = (1 << 11)
|
|
IORING_FEAT_LINKED_FILE = (1 << 12)
|
|
)
|
|
|
|
/*
|
|
* io_uring_register(2) opcodes and arguments
|
|
*/
|
|
const (
|
|
IORING_REGISTER_BUFFERS = 0
|
|
IORING_UNREGISTER_BUFFERS = 1
|
|
IORING_REGISTER_FILES = 2
|
|
IORING_UNREGISTER_FILES = 3
|
|
IORING_REGISTER_EVENTFD = 4
|
|
IORING_UNREGISTER_EVENTFD = 5
|
|
IORING_REGISTER_FILES_UPDATE = 6
|
|
IORING_REGISTER_EVENTFD_ASYNC = 7
|
|
IORING_REGISTER_PROBE = 8
|
|
IORING_REGISTER_PERSONALITY = 9
|
|
IORING_UNREGISTER_PERSONALITY = 10
|
|
IORING_REGISTER_RESTRICTIONS = 11
|
|
IORING_REGISTER_ENABLE_RINGS = 12
|
|
|
|
/* extended with tagging */
|
|
IORING_REGISTER_FILES2 = 13
|
|
IORING_REGISTER_FILES_UPDATE2 = 14
|
|
IORING_REGISTER_BUFFERS2 = 15
|
|
IORING_REGISTER_BUFFERS_UPDATE = 16
|
|
|
|
/* set/clear io-wq thread affinities */
|
|
IORING_REGISTER_IOWQ_AFF = 17
|
|
IORING_UNREGISTER_IOWQ_AFF = 18
|
|
|
|
/* set/get max number of io-wq workers */
|
|
IORING_REGISTER_IOWQ_MAX_WORKERS = 19
|
|
|
|
/* register/unregister io_uring fd with the ring */
|
|
IORING_REGISTER_RING_FDS = 20
|
|
IORING_UNREGISTER_RING_FDS = 21
|
|
|
|
/* register ring based provide buffer group */
|
|
IORING_REGISTER_PBUF_RING = 22
|
|
IORING_UNREGISTER_PBUF_RING = 23
|
|
|
|
/* this goes last */
|
|
IORING_REGISTER_LAST
|
|
)
|
|
|
|
/* io-wq worker categories */
|
|
const (
|
|
IO_WQ_BOUND = iota
|
|
IO_WQ_UNBOUND
|
|
)
|
|
|
|
/* deprecated, see struct IoUringRsrcUpdate */
|
|
type IoUringFilesUpdate struct {
|
|
Offset uint32
|
|
resv uint32
|
|
Fds uint64 // __aligned_u64/* __s32 * */
|
|
}
|
|
|
|
/*
|
|
* Register a fully sparse file space, rather than pass in an array of all
|
|
* -1 file descriptors.
|
|
*/
|
|
const IORING_RSRC_REGISTER_SPARSE = (1 << 0)
|
|
|
|
type IoUringRsrcRegister struct {
|
|
Nr uint32
|
|
Flags uint32
|
|
resv2 uint64
|
|
Data uint64 // __aligned_u64
|
|
Tags uint64 // __aligned_u64
|
|
}
|
|
|
|
type IoUringRsrcUpdate struct {
|
|
Offset uint32
|
|
resv uint32
|
|
Data uint64 // __aligned_u64
|
|
}
|
|
|
|
type IoUringRsrcUpdate2 struct {
|
|
Offset uint32
|
|
resv uint32
|
|
Data uint64 // __aligned_u64
|
|
Tags uint64 // __aligned_u64
|
|
Nr uint32
|
|
resv2 uint32
|
|
}
|
|
|
|
/* Skip updating fd indexes set to this value in the fd table */
|
|
const IORING_REGISTER_FILES_SKIP = (-2)
|
|
|
|
const IO_URING_OP_SUPPORTED = (1 << 0)
|
|
|
|
type IoUringProbeOp struct {
|
|
op uint8
|
|
resv uint8
|
|
flags uint16 /* IO_URING_OP_* flags */
|
|
resv2 uint32
|
|
}
|
|
|
|
type IoUringProbe struct {
|
|
last_op uint8 /* last opcode supported */
|
|
uint8 /* length of ops[] array below */
|
|
resv uint16
|
|
resv2 [3]uint32
|
|
ops [0]IoUringProbeOp
|
|
}
|
|
|
|
type IoUringRestriction struct {
|
|
opcode uint16
|
|
// union {
|
|
// __u8 register_op; /* IORING_RESTRICTION_REGISTER_OP */
|
|
// __u8 sqe_op; /* IORING_RESTRICTION_SQE_OP */
|
|
// __u8 sqe_flags; /* IORING_RESTRICTION_SQE_FLAGS_* */
|
|
// };
|
|
Union1 uint8
|
|
resv uint8
|
|
resv2 [3]uint32
|
|
}
|
|
|
|
type IoUringBuf struct {
|
|
Addr uint64
|
|
Len uint32
|
|
Bid uint16
|
|
resv uint16
|
|
}
|
|
|
|
type IoUringBufRing struct {
|
|
// union {
|
|
/*
|
|
* To avoid spilling into more pages than we need to, the
|
|
* ring tail is overlaid with the IoUringBuf->resv field.
|
|
*/
|
|
Anon0 struct {
|
|
resv1 uint64
|
|
resv2 uint32
|
|
resv3 uint16
|
|
Tail uint16
|
|
}
|
|
// bufs [0]IoUringBuf
|
|
// };
|
|
}
|
|
|
|
/* argument for IORING_(UN)REGISTER_PBUF_RING */
|
|
type IoUringBufReg struct {
|
|
RingAddr uint64
|
|
RingEntries uint32
|
|
Bgid uint16
|
|
Pad uint16
|
|
resv [3]uint64
|
|
}
|
|
|
|
/*
|
|
* IoUringRestriction->opcode values
|
|
*/
|
|
const (
|
|
/* Allow an io_uring_register(2) opcode */
|
|
IORING_RESTRICTION_REGISTER_OP = 0
|
|
|
|
/* Allow an sqe opcode */
|
|
IORING_RESTRICTION_SQE_OP = 1
|
|
|
|
/* Allow sqe flags */
|
|
IORING_RESTRICTION_SQE_FLAGS_ALLOWED = 2
|
|
|
|
/* Require sqe flags (these flags must be set on each submission) */
|
|
IORING_RESTRICTION_SQE_FLAGS_REQUIRED = 3
|
|
|
|
IORING_RESTRICTION_LAST
|
|
)
|
|
|
|
type IoUringGeteventsArg struct {
|
|
Sigmask uint64
|
|
SigmaskSz uint32
|
|
Pad uint32
|
|
Ts uint64
|
|
}
|
|
|
|
/*
|
|
* accept flags stored in sqe->ioprio
|
|
*/
|
|
// const IORING_ACCEPT_MULTISHOT = (1 << 0)
|