1 // Copyright 2020 The ChromiumOS Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 use std::io::Error;
6 use std::os::unix::io::RawFd;
7 use std::ptr::null_mut;
8
9 use libc::c_int;
10 use libc::c_long;
11 use libc::c_uint;
12 use libc::c_void;
13 use libc::syscall;
14 use libc::SYS_io_uring_enter;
15 use libc::SYS_io_uring_register;
16 use libc::SYS_io_uring_setup;
17
18 use crate::bindings::*;
19
20 /// Returns the system error as the result;
21 pub type Result<T> = std::result::Result<T, c_int>;
22
io_uring_setup(num_entries: usize, params: &io_uring_params) -> Result<RawFd>23 pub unsafe fn io_uring_setup(num_entries: usize, params: &io_uring_params) -> Result<RawFd> {
24 let ret = syscall(
25 SYS_io_uring_setup as c_long,
26 num_entries as c_int,
27 params as *const _,
28 );
29 if ret < 0 {
30 return Err(Error::last_os_error().raw_os_error().unwrap());
31 }
32 Ok(ret as RawFd)
33 }
34
io_uring_enter(fd: RawFd, to_submit: u64, to_wait: u64, flags: u32) -> Result<()>35 pub unsafe fn io_uring_enter(fd: RawFd, to_submit: u64, to_wait: u64, flags: u32) -> Result<()> {
36 let ret = syscall(
37 SYS_io_uring_enter as c_long,
38 fd,
39 to_submit as c_int,
40 to_wait as c_int,
41 flags as c_int,
42 null_mut::<*mut c_void>(),
43 );
44 if ret < 0 {
45 return Err(Error::last_os_error().raw_os_error().unwrap());
46 }
47 Ok(())
48 }
49
io_uring_register( fd: RawFd, opcode: u32, args: *const c_void, nr_args: u32, ) -> Result<()>50 pub unsafe fn io_uring_register(
51 fd: RawFd,
52 opcode: u32,
53 args: *const c_void,
54 nr_args: u32,
55 ) -> Result<()> {
56 let ret = syscall(
57 SYS_io_uring_register as c_long,
58 fd,
59 opcode as c_uint,
60 args,
61 nr_args as c_uint,
62 );
63 if ret < 0 {
64 return Err(Error::last_os_error().raw_os_error().unwrap());
65 }
66 Ok(())
67 }
68