iouring

package
v0.3.0-alpha Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: May 14, 2023 License: Apache-2.0 Imports: 11 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	CQEFBuffer uint32 = 1 << iota
	CQEFMore
	CQEFSockNonempty
	CQEFNotif
)
View Source 
const (
	EnterGetEvents uint32 = 1 << iota
	EnterSQWakeup
	EnterSQWait
	EnterExtArg
	EnterRegisteredRing
)
View Source 
const (
	OpNop uint8 = iota
	OpReadv
	OpWritev
	OpFsync
	OpReadFixed
	OpWriteFixed
	OpPollAdd
	OpPollRemove
	OpSyncFileRange
	OpSendmsg
	OpRecvmsg
	OpTimeout
	OpTimeoutRemove
	OpAccept
	OpAsyncCancel
	OpLinkTimeout
	OpConnect
	OpFallocate
	OpOpenat
	OpClose
	OpFilesUpdate
	OpStatx
	OpRead
	OpWrite
	OpFadvise
	OpMadvise
	OpSend
	OpRecv
	OpOpenat2
	OpEpollCtl
	OpSplice
	OpProvideBuffers
	OpRemoveBuffers
	OpTee
	OpShutdown
	OpRenameat
	OpUnlinkat
	OpMkdirat
	OpSymlinkat
	OpLinkat
	OpMsgRing
	OpFsetxattr
	OpSetxattr
	OpFgetxattr
	OpGetxattr
	OpSocket
	OpUringCmd
	OpSendZC
	OpSendMsgZC

	OpLast
)
View Source 
const (
	RestrictionRegisterOp uint32 = iota
	RestrictionSQEOp
	RestrictionSQEFlagsAllowed
	RestrictionSQEFlagsRequired

	RestrictionLast
)
View Source 
const (
	RegisterBuffers uint = iota
	UnregisterBuffers

	RegisterFiles
	UnregisterFiles

	RegisterEventFD
	UnregisterEventFD

	RegisterFilesUpdate
	RegisterEventFDAsync
	RegisterProbe

	RegisterPersonality
	UnregisterPersonality

	RegisterRestrictions
	UnregisterEnableRings

	RegisterFiles2
	RegisterFilesUpdate2
	RegisterBuffers2
	RegisterBuffersUpdate

	RegisterIOWQAff
	UnregisterIOWQAff

	RegisterIOWQMaxWorkers

	RegisterRingFDs
	UnregisterRingFDs

	RegisterPbufRing
	UnregisterPbufRing

	RegisterSyncCancel

	RegisterFileAllocRange

	RegisterLast
)
View Source 
const (
	IOWQBound uint = iota
	IOWQUnbound
)
View Source 
const (
	SQNeedWakeup uint32 = 1 << iota
	SQCQOverflow
	SQTaskrun
)
View Source 
const (
	SetupIOPoll uint32 = 1 << iota
	SetupSQPoll
	SetupSQAff
	SetupSQSize
	SetupClamp
	SetupAttachWQ
	SetupRDisabled
	SetupSubmitAll
	SetupCoopTaskrun
	SetupTaskrunFlag
	SetupSQE128
	SetupSQE32
	SetupSingleIssuer
	SetupDeferTaskrun
)
View Source 
const (
	FeatSingleMMap uint32 = 1 << iota
	FeatNoDrop
	FeatSubmitStable
	FeatRWCurPos
	FeatCurPersonality
	FeatFastPoll
	FeatPoll32Bits
	FeatSQPollNonfixed
	FeatExtArg
	FeatNativeWorkers
	FeatRcrcTags
	FeatCQESkip
	FeatLinkedFile
)
View Source 
const (
	SqeFixedFile uint8 = 1 << iota
	SqeIODrain
	SqeIOLink
	SqeIOHardlink
	SqeAsync
	SqeBufferSelect
	SqeCQESkipSuccess
)
View Source 
const (
	TimeoutAbs uint32 = 1 << iota
	TimeoutUpdate
	TimeoutBoottime
	TimeoutRealtime
	LinkTimeoutUpdate
	TimeoutETimeSuccess
	TimeoutClockMask  = TimeoutBoottime | TimeoutRealtime
	TimeoutUpdateMask = TimeoutUpdate | LinkTimeoutUpdate
)
View Source 
const (
	PollAddMulti uint32 = 1 << iota
	PollUpdateEvents
	PollUpdateUserData
	PollAddLevel
)
View Source 
const (
	AsyncCancelAll uint32 = 1 << iota
	AsyncCancelFd
	AsyncCancelAny
	AsyncCancelFdFixed
)
View Source 
const (
	RecvsendPollFirst uint16 = 1 << iota
	RecvMultishot
	RecvsendFixedBuf
)
View Source 
const (
	MsgData uint32 = iota
	MsgSendFd
)
View Source 
const (
	AcceptMultishot uint16 = 1 << iota
)
View Source 
const CQEBufferShift uint32 = 16
View Source 
const CQEventFdDisabled uint32 = 1 << 0
View Source 
const FileIndexAlloc uint = 4294967295
View Source 
const FsyncDatasync uint32 = 1 << 0
View Source 
const (
	IntFlagRegRing uint8 = 1
)
View Source 
const (
	MsgRingCQESkip uint32 = 1 << iota
)
View Source 
const RegisterFilesSkip int = -2
View Source 
const (
	RsrcRegisterSparse uint32 = 1 << iota
)
View Source 
const SpliceFFdInFixed uint32 = 1 << 31

Variables

View Source 
var (
	ErrNotImplemented     = errors.New("not implemented")
	ErrNotSupported       = errors.New("not supported")
	ErrTimerExpired       = errors.New("timer expired")
	ErrInterrupredSyscall = errors.New("interrupred system call")
	ErrAgain              = errors.New("try again")
	ErrSQEOverflow        = errors.New("SQE overflow")
)

Functions

func CheckAvailableFeatures 

func CheckAvailableFeatures() (string, error)

func ErrorSQEOverflow 

func ErrorSQEOverflow(overflowValue uint32) error

func IsOpSupported 

func IsOpSupported(opCode uint8) (bool, error)

Types

type CQRingOffsets 

type CQRingOffsets struct {
	// contains filtered or unexported fields
}

type CompletionQueue 

type CompletionQueue struct {
	// contains filtered or unexported fields
}

type CompletionQueueEvent 

type CompletionQueueEvent struct {
	// contains filtered or unexported fields
}

func (*CompletionQueueEvent) Flags 

func (c *CompletionQueueEvent) Flags() uint32

func (*CompletionQueueEvent) FlagsString 

func (c *CompletionQueueEvent) FlagsString() string

func (*CompletionQueueEvent) Res 

func (c *CompletionQueueEvent) Res() int32

func (*CompletionQueueEvent) UserData 

func (c *CompletionQueueEvent) UserData() uint64

type FilesUpdate 

type FilesUpdate struct {
	Offset uint32
	Resv   uint32
	Fds    uint64
}

type Params 

type Params struct {
	// contains filtered or unexported fields
}

type Probe 

type Probe struct {
	LastOp uint8
	OpsLen uint8
	Res    uint16
	Res2   [3]uint32
	Ops    [probeOpsSize]probeOp
}

func (Probe) IsSupported 

func (p Probe) IsSupported(op uint8) bool

type Ring 

type Ring struct {
	// contains filtered or unexported fields
}

func CreateRing 

func CreateRing() (*Ring, error)

func (*Ring) CQAdvance 

func (ring *Ring) CQAdvance(numberOfCQEs uint32)

func (*Ring) CQESeen 

func (ring *Ring) CQESeen(event *CompletionQueueEvent)

func (*Ring) Close 

func (ring *Ring) Close() error

func (*Ring) Fd 

func (ring *Ring) Fd() int

func (*Ring) FlushSQ 

func (ring *Ring) FlushSQ() uint32

func (*Ring) GetSQE 

func (ring *Ring) GetSQE() (*SubmissionQueueEntry, error)

func (*Ring) PeekBatchCQE 

func (ring *Ring) PeekBatchCQE(cqes []*CompletionQueueEvent) int

func (*Ring) QueueExit 

func (ring *Ring) QueueExit() error

func (*Ring) QueueInit 

func (ring *Ring) QueueInit(entries uint, flags uint32) error

func (*Ring) QueueInitParams 

func (ring *Ring) QueueInitParams(entries uint) error

func (*Ring) Register 

func (ring *Ring) Register(op uint, arg unsafe.Pointer, nrArgs int) (uintptr, uintptr, error)

func (*Ring) RegisterBuffers 

func (ring *Ring) RegisterBuffers(iovecs []syscall.Iovec) (uintptr, uintptr, error)

func (*Ring) RegisterFiles 

func (ring *Ring) RegisterFiles(files unsafe.Pointer, nrFiles int) (uintptr, error)

func (*Ring) RegisterFilesSparse 

func (ring *Ring) RegisterFilesSparse(nrFiles uint32) (uintptr, error)

func (*Ring) RegisterIOWQMaxWorkers 

func (ring *Ring) RegisterIOWQMaxWorkers(args []uint) (uintptr, uintptr, error)

func (*Ring) RegisterProbe 

func (ring *Ring) RegisterProbe() (*Probe, error)

func (*Ring) RegisterRingFd 

func (ring *Ring) RegisterRingFd() (uintptr, error)

func (*Ring) SQReady 

func (ring *Ring) SQReady() uint32

func (*Ring) SQSpaceLeft 

func (ring *Ring) SQSpaceLeft() uint32

func (*Ring) Submit 

func (ring *Ring) Submit() (uint, error)

func (*Ring) SubmitAndWait 

func (ring *Ring) SubmitAndWait(waitNr uint64) (uint, error)

func (*Ring) SubmitAndWaitInternal 

func (ring *Ring) SubmitAndWaitInternal(waitNr uint64) (uint, error)

func (*Ring) SubmitAndWaitTimeout 

func (ring *Ring) SubmitAndWaitTimeout(waitNr uint32, timeSpec *syscall.Timespec) (*CompletionQueueEvent, error)

func (*Ring) SubmitInternal 

func (ring *Ring) SubmitInternal(submitted uint32, waitNr uint64) (uint, error)

func (*Ring) UnmapRings 

func (ring *Ring) UnmapRings() error

func (*Ring) UnregisterBuffers 

func (ring *Ring) UnregisterBuffers() (uintptr, uintptr, error)

func (*Ring) UnregisterRingFd 

func (ring *Ring) UnregisterRingFd() (uintptr, error)

func (*Ring) WaitCQE 

func (ring *Ring) WaitCQE() (*CompletionQueueEvent, error)

func (*Ring) WaitCQENr 

func (ring *Ring) WaitCQENr(waitNr uint32) (*CompletionQueueEvent, error)

type RsrcRegister 

type RsrcRegister struct {
	Nr    uint32
	Resv  uint32
	Resv2 uint32
	Data  uint64
	Tags  uint64
}

type RsrcUpdate 

type RsrcUpdate struct {
	Offset uint32
	Resv   uint32
	Data   uint64
}

type RsrcUpdate2 

type RsrcUpdate2 struct {
	Offset uint32
	Resv   uint32
	Data   uint64
	Tags   uint64
	Nr     uint32
	Resv2  uint32
}

type SQRingOffsets 

type SQRingOffsets struct {
	// contains filtered or unexported fields
}

type SubmissionQueue 

type SubmissionQueue struct {
	// contains filtered or unexported fields
}

type SubmissionQueueEntry 

type SubmissionQueueEntry struct {
	OpCode      uint8
	Flags       uint8
	IoPrio      uint16
	Fd          int32
	Off         uint64
	Addr        uint64
	Len         uint32
	OpcodeFlags uint32
	UserData    uint64

	BufIG       uint16
	Personality uint16
	SpliceFdIn  int32
	// contains filtered or unexported fields
}

func (*SubmissionQueueEntry) PrepareAccept 

func (entry *SubmissionQueueEntry) PrepareAccept(fd int, addr uintptr, addrLen uint64, flags uint32)

func (*SubmissionQueueEntry) PrepareAcceptDirect 

func (entry *SubmissionQueueEntry) PrepareAcceptDirect(
	fd int, addr uintptr, addrLen uint64, flags uint32, fileIndex uint,
)

func (*SubmissionQueueEntry) PrepareCancel 

func (entry *SubmissionQueueEntry) PrepareCancel(_ uint64, _ int)

PrepareCancel has not been implemented yet.

func (*SubmissionQueueEntry) PrepareClose 

func (entry *SubmissionQueueEntry) PrepareClose(fd int)

func (*SubmissionQueueEntry) PrepareCloseDirect 

func (entry *SubmissionQueueEntry) PrepareCloseDirect(fileIndex uint)

func (*SubmissionQueueEntry) PrepareConnect 

func (entry *SubmissionQueueEntry) PrepareConnect(_ int, _ uintptr, _ uint64)

PrepareConnect has not been implemented yet.

func (*SubmissionQueueEntry) PrepareConnectFilesUpdate 

func (entry *SubmissionQueueEntry) PrepareConnectFilesUpdate(_ []int, _ uint64, _ uint)

PrepareConnectFilesUpdate has not been implemented yet.

func (*SubmissionQueueEntry) PrepareEpollCtrl 

func (entry *SubmissionQueueEntry) PrepareEpollCtrl()

PrepareEpollCtrl has not been implemented yet.

func (*SubmissionQueueEntry) PrepareFadvise 

func (entry *SubmissionQueueEntry) PrepareFadvise(
	_ int,
	_ uint64,
	_ uint32,
	_ int,
)

PrepareFadvise has not been implemented yet.

func (*SubmissionQueueEntry) PrepareFallocate 

func (entry *SubmissionQueueEntry) PrepareFallocate(_ int, _ int, _ uint64, _ uint64)

PrepareFallocate has not been implemented yet.

func (*SubmissionQueueEntry) PrepareFgetxattr 

func (entry *SubmissionQueueEntry) PrepareFgetxattr()

PrepareFgetxattr has not been implemented yet.

func (*SubmissionQueueEntry) PrepareFsetxattr 

func (entry *SubmissionQueueEntry) PrepareFsetxattr()

PrepareFsetxattr has not been implemented yet.

func (*SubmissionQueueEntry) PrepareFsync 

func (entry *SubmissionQueueEntry) PrepareFsync(_ int, _ uint)

PrepareFsync has not been implemented yet.

func (*SubmissionQueueEntry) PrepareGetxattr 

func (entry *SubmissionQueueEntry) PrepareGetxattr()

PrepareGetxattr has not been implemented yet. 

func (entry *SubmissionQueueEntry) PrepareLink()

PrepareLink has not been implemented yet.

func (*SubmissionQueueEntry) PrepareLinkTimeout 

func (entry *SubmissionQueueEntry) PrepareLinkTimeout(_ *syscall.Timespec, _ uint)

PrepareLinkTimeout has not been implemented yet.

func (*SubmissionQueueEntry) PrepareLinkat 

func (entry *SubmissionQueueEntry) PrepareLinkat()

PrepareLinkat has not been implemented yet.

func (*SubmissionQueueEntry) PrepareMadvise 

func (entry *SubmissionQueueEntry) PrepareMadvise(
	_ uintptr,
	_ uint32,
	_ int,
)

PrepareMadvise has not been implemented yet.

func (*SubmissionQueueEntry) PrepareMkdir 

func (entry *SubmissionQueueEntry) PrepareMkdir()

PrepareMkdir has not been implemented yet.

func (*SubmissionQueueEntry) PrepareMkdirat 

func (entry *SubmissionQueueEntry) PrepareMkdirat()

PrepareMkdirat has not been implemented yet.

func (*SubmissionQueueEntry) PrepareMsgRing 

func (entry *SubmissionQueueEntry) PrepareMsgRing(fd int, length uint32, data uint64, flags uint32)

func (*SubmissionQueueEntry) PrepareNop 

func (entry *SubmissionQueueEntry) PrepareNop()

func (*SubmissionQueueEntry) PrepareOpenat 

func (entry *SubmissionQueueEntry) PrepareOpenat(_ int, _ string, _ int, _ uint32)

PrepareOpenat has not been implemented yet.

func (*SubmissionQueueEntry) PrepareOpenat2 

func (entry *SubmissionQueueEntry) PrepareOpenat2()

PrepareOpenat2 has not been implemented yet.

func (*SubmissionQueueEntry) PrepareOpenat2Direct 

func (entry *SubmissionQueueEntry) PrepareOpenat2Direct()

PrepareOpenat2Direct has not been implemented yet.

func (*SubmissionQueueEntry) PrepareOpenatDirect 

func (entry *SubmissionQueueEntry) PrepareOpenatDirect(_ int, _ string, _ int, _ uint32, _ uint)

PrepareOpenatDirect has not been implemented yet.

func (*SubmissionQueueEntry) PreparePollAdd 

func (entry *SubmissionQueueEntry) PreparePollAdd(_ int, _ uint)

PreparePollAdd has not been implemented yet.

func (*SubmissionQueueEntry) PreparePollMultishot 

func (entry *SubmissionQueueEntry) PreparePollMultishot(_ int, _ uint)

PreparePollMultishot has not been implemented yet.

func (*SubmissionQueueEntry) PreparePollRemove 

func (entry *SubmissionQueueEntry) PreparePollRemove(_ int, _ uint64)

PreparePollRemove has not been implemented yet.

func (*SubmissionQueueEntry) PreparePollUpdate 

func (entry *SubmissionQueueEntry) PreparePollUpdate(_ int, _, _ uint64, _, _ uint)

PreparePollUpdate has not been implemented yet.

func (*SubmissionQueueEntry) PrepareProvideBuffers 

func (entry *SubmissionQueueEntry) PrepareProvideBuffers(
	addr uintptr,
	length uint32,
	fileDescriptor int,
	bgid uint64,
	off uint64,
)

func (*SubmissionQueueEntry) PrepareRead 

func (entry *SubmissionQueueEntry) PrepareRead(
	_ int,
	_ uintptr,
	_ uint32,
	_ uint64,
)

PrepareRead has not been implemented yet.

func (*SubmissionQueueEntry) PrepareReadFixed 

func (entry *SubmissionQueueEntry) PrepareReadFixed(
	fileDescriptor int,
	vectors uintptr,
	length uint32,
	offset uint64,
	index int,
)

func (*SubmissionQueueEntry) PrepareReadv 

func (entry *SubmissionQueueEntry) PrepareReadv(fd int, iovecs uintptr, nrVecs uint32, offset uint64)

func (*SubmissionQueueEntry) PrepareReadv2 

func (entry *SubmissionQueueEntry) PrepareReadv2(fd int, iovecs uintptr, nrVecs uint32, offset uint64, flags uint32)

func (*SubmissionQueueEntry) PrepareRecv 

func (entry *SubmissionQueueEntry) PrepareRecv(
	fileDescriptor int,
	addr uintptr,
	length uint32,
	flags uint32,
)

func (*SubmissionQueueEntry) PrepareRecvMsg 

func (entry *SubmissionQueueEntry) PrepareRecvMsg(
	fileDescriptor int,
	msg *syscall.Msghdr,
	flags uint32,
)

func (*SubmissionQueueEntry) PrepareRecvMultishot 

func (entry *SubmissionQueueEntry) PrepareRecvMultishot(
	fileDescriptor int,
	addr uintptr,
	length uint32,
	flags uint32,
)

func (*SubmissionQueueEntry) PrepareRemoveBuffers 

func (entry *SubmissionQueueEntry) PrepareRemoveBuffers()

PrepareRemoveBuffers has not been implemented yet.

func (*SubmissionQueueEntry) PrepareRemoveTimeout2 

func (entry *SubmissionQueueEntry) PrepareRemoveTimeout2(ts *syscall.Timespec, count uint64, flags uint32)

func (*SubmissionQueueEntry) PrepareRename 

func (entry *SubmissionQueueEntry) PrepareRename()

PrepareRename has not been implemented yet.

func (*SubmissionQueueEntry) PrepareRenameat 

func (entry *SubmissionQueueEntry) PrepareRenameat()

PrepareRenameat has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSend 

func (entry *SubmissionQueueEntry) PrepareSend(
	fileDescriptor int,
	addr uintptr,
	length uint32,
	flags uint32,
)

func (*SubmissionQueueEntry) PrepareSendMsg 

func (entry *SubmissionQueueEntry) PrepareSendMsg(
	fileDescriptor int,
	msg *syscall.Msghdr,
	flags uint32,
)

func (*SubmissionQueueEntry) PrepareSendSetAddr 

func (entry *SubmissionQueueEntry) PrepareSendSetAddr(
	_ uintptr,
	_ uint16,
)

PrepareSendSetAddr has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSendZC 

func (entry *SubmissionQueueEntry) PrepareSendZC(
	_ int,
	_ uintptr,
	_ uint32,
	_ uint32,
	_ uint,
)

PrepareSendZC has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSetxattr 

func (entry *SubmissionQueueEntry) PrepareSetxattr()

PrepareSetxattr has not been implemented yet.

func (*SubmissionQueueEntry) PrepareShutdown 

func (entry *SubmissionQueueEntry) PrepareShutdown()

PrepareShutdown has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSocket 

func (entry *SubmissionQueueEntry) PrepareSocket()

PrepareSocket has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSocketDirect 

func (entry *SubmissionQueueEntry) PrepareSocketDirect()

PrepareSocketDirect has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSocketDirectAlloc 

func (entry *SubmissionQueueEntry) PrepareSocketDirectAlloc()

PrepareSocketDirectAlloc has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSplice 

func (entry *SubmissionQueueEntry) PrepareSplice(
	_ int, _ int64, _ int, _ int64, _ uint, _ uint,
)

PrepareSplice has not been implemented yet.

func (*SubmissionQueueEntry) PrepareStatx 

func (entry *SubmissionQueueEntry) PrepareStatx(
	_ int,
	_ string,
	_ int,
	_ uint,
	_ uintptr,
)

PrepareStatx has not been implemented yet. 

func (entry *SubmissionQueueEntry) PrepareSymlink()

PrepareSymlink has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSymlinkat 

func (entry *SubmissionQueueEntry) PrepareSymlinkat()

PrepareSymlinkat has not been implemented yet.

func (*SubmissionQueueEntry) PrepareSyncFileRange 

func (entry *SubmissionQueueEntry) PrepareSyncFileRange()

PrepareSyncFileRange has not been implemented yet.

func (*SubmissionQueueEntry) PrepareTee 

func (entry *SubmissionQueueEntry) PrepareTee(_ int, _ int, _ uint, _ uint)

PrepareTee has not been implemented yet.

func (*SubmissionQueueEntry) PrepareTimeout 

func (entry *SubmissionQueueEntry) PrepareTimeout(duration time.Duration, count uint64, flags uint32)

func (*SubmissionQueueEntry) PrepareTimeout2 

func (entry *SubmissionQueueEntry) PrepareTimeout2(ts *syscall.Timespec, count uint64, flags uint32)

func (*SubmissionQueueEntry) PrepareTimeoutRemove 

func (entry *SubmissionQueueEntry) PrepareTimeoutRemove(duration time.Duration, count uint64, flags uint32)

func (*SubmissionQueueEntry) PrepareTimeoutUpdate 

func (entry *SubmissionQueueEntry) PrepareTimeoutUpdate(duration time.Duration, count uint64, flags uint32)
func (entry *SubmissionQueueEntry) PrepareUnlink()

PrepareUnlink has not been implemented yet.

func (*SubmissionQueueEntry) PrepareUnlinkat 

func (entry *SubmissionQueueEntry) PrepareUnlinkat()

PrepareUnlinkat has not been implemented yet.

func (*SubmissionQueueEntry) PrepareUpdateTimeout2 

func (entry *SubmissionQueueEntry) PrepareUpdateTimeout2(ts *syscall.Timespec, count uint64, flags uint32)

func (*SubmissionQueueEntry) PrepareWrite 

func (entry *SubmissionQueueEntry) PrepareWrite(
	_ int,
	_ uintptr,
	_ uint32,
	_ uint64,
)

PrepareWrite has not been implemented yet.

func (*SubmissionQueueEntry) PrepareWriteFixed 

func (entry *SubmissionQueueEntry) PrepareWriteFixed(
	fileDescriptor int,
	vectors uintptr,
	length uint32,
	offset uint64,
	index int,
)

func (*SubmissionQueueEntry) PrepareWritev 

func (entry *SubmissionQueueEntry) PrepareWritev(
	fd int,
	iovecs uintptr,
	nrVecs uint32,
	offset uint64,
)

func (*SubmissionQueueEntry) PrepareWritev2 

func (entry *SubmissionQueueEntry) PrepareWritev2(
	fd int,
	iovecs uintptr,
	nrVecs uint32,
	offset uint64,
	flags uint32,
)

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