Used to select how the read should be handled.
Fields
buffer: []u8,
io_uring will read directly into this buffer
buffer_selection: struct { group_id: u16, len: usize, },
io_uring will select a buffer that has previously been provided with provide_buffers
. The buffer group reference by group_id
must contain at least one buffer for the read to work. len
controls the number of bytes to read into the selected buffer.