Struct io_uring::opcode::Read

pub struct Read { /* private fields */ }

Issue the equivalent of a pread(2) or pwrite(2) system call

• fd is the file descriptor to be operated on,
• addr contains the buffer in question,
• len contains the length of the IO operation,

These are non-vectored versions of the IORING_OP_READV and IORING_OP_WRITEV opcodes. See also read(2) and write(2) for the general description of the related system call.

Available since 5.6.

Implementations

impl Read

pub fn new(fd: impl UseFixed, buf: *mut u8, len: u32) -> Self

pub const CODE: u8 = 22u8

The opcode of the operation. This can be passed to Probe::is_supported to check if this operation is supported with the current kernel.

pub const fn offset(self, offset: off_t) -> Self

offset contains the read or write offset.

If fd does not refer to a seekable file, offset must be set to zero. If offsett is set to -1, the offset will use (and advance) the file position, like the read(2) and write(2) system calls.

pub const fn ioprio(self, ioprio: u16) -> Self

pub const fn rw_flags(self, rw_flags: RwFlags) -> Self

pub const fn buf_group(self, buf_group: u16) -> Self

pub fn build(self) -> Entry