1/**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 *** To edit the content of this header, modify the corresponding 11 *** source file (e.g. under external/kernel-headers/original/) then 12 *** run bionic/libc/kernel/tools/update_all.py 13 *** 14 *** Any manual change here will be lost the next time this script will 15 *** be run. You've been warned! 16 *** 17 **************************************************************************** 18 ****************************************************************************/ 19#ifndef _UAPI_ASM_GENERIC_IOCTL_H 20#define _UAPI_ASM_GENERIC_IOCTL_H 21#define _IOC_NRBITS 8 22#define _IOC_TYPEBITS 8 23#ifndef _IOC_SIZEBITS 24#define _IOC_SIZEBITS 14 25#endif 26#ifndef _IOC_DIRBITS 27#define _IOC_DIRBITS 2 28#endif 29#define _IOC_NRMASK ((1 << _IOC_NRBITS) - 1) 30#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS) - 1) 31#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS) - 1) 32#define _IOC_DIRMASK ((1 << _IOC_DIRBITS) - 1) 33#define _IOC_NRSHIFT 0 34#define _IOC_TYPESHIFT (_IOC_NRSHIFT + _IOC_NRBITS) 35#define _IOC_SIZESHIFT (_IOC_TYPESHIFT + _IOC_TYPEBITS) 36#define _IOC_DIRSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS) 37#ifndef _IOC_NONE 38#define _IOC_NONE 0U 39#endif 40#ifndef _IOC_WRITE 41#define _IOC_WRITE 1U 42#endif 43#ifndef _IOC_READ 44#define _IOC_READ 2U 45#endif 46#define _IOC(dir,type,nr,size) (((dir) << _IOC_DIRSHIFT) | ((type) << _IOC_TYPESHIFT) | ((nr) << _IOC_NRSHIFT) | ((size) << _IOC_SIZESHIFT)) 47#define _IOC_TYPECHECK(t) (sizeof(t)) 48#define _IO(type,nr) _IOC(_IOC_NONE, (type), (nr), 0) 49#define _IOR(type,nr,size) _IOC(_IOC_READ, (type), (nr), (_IOC_TYPECHECK(size))) 50#define _IOW(type,nr,size) _IOC(_IOC_WRITE, (type), (nr), (_IOC_TYPECHECK(size))) 51#define _IOWR(type,nr,size) _IOC(_IOC_READ | _IOC_WRITE, (type), (nr), (_IOC_TYPECHECK(size))) 52#define _IOR_BAD(type,nr,size) _IOC(_IOC_READ, (type), (nr), sizeof(size)) 53#define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE, (type), (nr), sizeof(size)) 54#define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ | _IOC_WRITE, (type), (nr), sizeof(size)) 55#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) 56#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK) 57#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK) 58#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK) 59#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT) 60#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT) 61#define IOC_INOUT ((_IOC_WRITE | _IOC_READ) << _IOC_DIRSHIFT) 62#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT) 63#define IOCSIZE_SHIFT (_IOC_SIZESHIFT) 64#endif 65