Module opcode

Operation codes that can be used to construct squeue::Entrys.

Structs

• Accept
  Accept a new connection on a socket, equivalent to accept4(2).
• AcceptMulti
  Accept multiple new connections on a socket.
• AsyncCancel
  Attempt to cancel an already issued request.
• AsyncCancel2
  Attempt to cancel an already issued request, receiving a cancellation builder, which allows for the new cancel criterias introduced since 5.19.
• Close
  Close a file descriptor, equivalent to close(2).
• Connect
  Connect a socket, equivalent to connect(2).
• EpollCtl
  Modify an epoll file descriptor, equivalent to epoll_ctl(2).
• Fadvise
  Predeclare an access pattern for file data, equivalent to posix_fadvise(2).
• Fallocate
  Preallocate or deallocate space to a file, equivalent to fallocate(2).
• FilesUpdate
  This command is an alternative to using Submitter::register_files_update which then works in an async fashion, like the rest of the io_uring commands.
• Fsync
  File sync, equivalent to fsync(2).
• FutexWait
  Wait on a futex, like but not equivalant to futex(2)’s FUTEX_WAIT_BITSET.
• FutexWaitV
  Wait on multiple futexes.
• FutexWake
  Wake up waiters on a futex, like but not equivalant to futex(2)’s FUTEX_WAKE_BITSET.
• LinkAt
  Create a hard link, equivalent to linkat(2).
• LinkTimeout
  This request must be linked with another request through Flags::IO_LINK which is described below. Unlike Timeout, LinkTimeout acts on the linked request, not the completion queue.
• Madvise
  Give advice about use of memory, equivalent to madvise(2).
• MkDirAt
  Make a directory, equivalent to mkdirat(2).
• MsgRingData
  Send a message (with data) to a target ring.
• MsgRingSendFd
  Send a message (with fixed FD) to a target ring.
• Nop
  Do not perform any I/O.
• OpenAt
  Open a file, equivalent to openat(2).
• OpenAt2
  Open a file, equivalent to openat2(2).
• PollAdd
  Poll the specified fd.
• PollRemove
  Remove an existing poll request.
• ProvideBuffers
  Register nbufs buffers that each have the length len with ids starting from bid in the group bgid that can be used for any request. See BUFFER_SELECT for more info.
• Read
  Issue the equivalent of a pread(2) or pwrite(2) system call
• ReadFixed
  Read from a file into a fixed buffer that has been previously registered with Submitter::register_buffers.
• Readv
  Vectored read, equivalent to preadv2(2).
• Recv
  Receive a message from a socket, equivalent to recv(2).
• RecvMsg
  Receive a message on a socket, equivalent to recvmsg(2).
• RecvMsgMulti
  Receive multiple messages on a socket, equivalent to recvmsg(2).
• RecvMulti
  Receive multiple messages from a socket, equivalent to recv(2).
• RemoveBuffers
  Remove some number of buffers from a buffer group. See BUFFER_SELECT for more info.
• RenameAt
• Send
  Send a message on a socket, equivalent to send(2).
• SendMsg
  Send a message on a socket, equivalent to send(2).
• SendMsgZc
  Send a zerocopy message on a socket, equivalent to send(2).
• SendZc
  Send a zerocopy message on a socket, equivalent to send(2).
• Shutdown
  Shut down all or part of a full duplex connection on a socket, equivalent to shutdown(2). Available since kernel 5.11.
• Socket
  Create an endpoint for communication, equivalent to socket(2).
• Splice
  Splice data to/from a pipe, equivalent to splice(2).
• Statx
  Get file status, equivalent to statx(2).
• SymlinkAt
  Create a symlink, equivalent to symlinkat(2).
• SyncFileRange
  Sync a file segment with disk, equivalent to sync_file_range(2).
• Tee
  Duplicate pipe content, equivalent to tee(2).
• Timeout
  Register a timeout operation.
• TimeoutRemove
  Attempt to remove an existing timeout operation.
• TimeoutUpdate
  Attempt to update an existing timeout operation with a new timespec. The optional count value of the original timeout value cannot be updated.
• UnlinkAt
• UringCmd16
  A file/device-specific 16-byte command, akin (but not equivalent) to ioctl(2).
• UringCmd80
  A file/device-specific 80-byte command, akin (but not equivalent) to ioctl(2).
• Write
  Issue the equivalent of a pread(2) or pwrite(2) system call
• WriteFixed
  Write to a file from a fixed buffer that have been previously registered with Submitter::register_buffers.
• Writev
  Vectored write, equivalent to pwritev2(2).