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