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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273// SPDX-License-Identifier: GPL-2.0
//! `ioctl()` number definitions.//!//! C header: [`include/asm-generic/ioctl.h`](srctree/include/asm-generic/ioctl.h)
#![expect(non_snake_case)]
use crate::build_assert::build_assert;
/// Build an ioctl number, analogous to the C macro of the same name.#[inline(always)]const fn _IOC(dir: u32, ty: u32, nr: u32, size: usize) -> u32 { build_assert!(dir <= uapi::_IOC_DIRMASK); build_assert!(ty <= uapi::_IOC_TYPEMASK); build_assert!(nr <= uapi::_IOC_NRMASK); build_assert!(size <= (uapi::_IOC_SIZEMASK as usize));
(dir << uapi::_IOC_DIRSHIFT) | (ty << uapi::_IOC_TYPESHIFT) | (nr << uapi::_IOC_NRSHIFT) | ((size as u32) << uapi::_IOC_SIZESHIFT)}
/// Build an ioctl number for an argumentless ioctl.#[inline(always)]pub const fn _IO(ty: u32, nr: u32) -> u32 { _IOC(uapi::_IOC_NONE, ty, nr, 0)}
/// Build an ioctl number for a read-only ioctl.#[inline(always)]pub const fn _IOR<T>(ty: u32, nr: u32) -> u32 { _IOC(uapi::_IOC_READ, ty, nr, core::mem::size_of::<T>())}
/// Build an ioctl number for a write-only ioctl.#[inline(always)]pub const fn _IOW<T>(ty: u32, nr: u32) -> u32 { _IOC(uapi::_IOC_WRITE, ty, nr, core::mem::size_of::<T>())}
/// Build an ioctl number for a read-write ioctl.#[inline(always)]pub const fn _IOWR<T>(ty: u32, nr: u32) -> u32 { _IOC( uapi::_IOC_READ | uapi::_IOC_WRITE, ty, nr, core::mem::size_of::<T>(), )}
/// Get the ioctl direction from an ioctl number.pub const fn _IOC_DIR(nr: u32) -> u32 { (nr >> uapi::_IOC_DIRSHIFT) & uapi::_IOC_DIRMASK}
/// Get the ioctl type from an ioctl number.pub const fn _IOC_TYPE(nr: u32) -> u32 { (nr >> uapi::_IOC_TYPESHIFT) & uapi::_IOC_TYPEMASK}
/// Get the ioctl number from an ioctl number.pub const fn _IOC_NR(nr: u32) -> u32 { (nr >> uapi::_IOC_NRSHIFT) & uapi::_IOC_NRMASK}
/// Get the ioctl size from an ioctl number.pub const fn _IOC_SIZE(nr: u32) -> usize { ((nr >> uapi::_IOC_SIZESHIFT) & uapi::_IOC_SIZEMASK) as usize}