[−][src]Module linux_io_uring::opcode

Structs

Fsync	File sync. See also `fsync(2)`. Note that, while I/O is initiated in the order in which it appears in the submission queue, completions are unordered. For example, an application which places a write I/O followed by an fsync in the submission queue cannot expect the fsync to apply to the write. The two operations execute in parallel, so the fsync may complete before the write is issued to the storage. The same is also true for previously issued writes that have not completed prior to the fsync.
Nop	Do not perform any I/O. This is useful for testing the performance of the io_uring implementation itself.
PollAdd	Poll the fd specified in the submission queue entry for the events specified in the `poll_events` field. Unlike poll or epoll without `EPOLLONESHOT`, this interface always works in one shot mode. That is, once the poll operation is completed, it will have to be resubmitted.
PollRemove	Remove an existing poll request. If found, the `result` method of the `cqueue::Entry` will return 0. If not found, `result` will return `-libc::ENOENT`.
ReadFixed	Read from pre-mapped buffers.
Readv	Vectored read operations, similar to `preadv2 (2)`.
RecvMsg
SendMsg
SyncFileRange
WriteFixed	Write to pre-mapped buffers.
Writev	Vectored write operations, similar to `pwritev2 (2)`.