diff options
author | David Howells <dhowells@redhat.com> | 2012-10-04 21:20:15 +0400 |
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committer | David Howells <dhowells@redhat.com> | 2012-10-04 21:20:15 +0400 |
commit | 8a1ab3155c2ac7fbe5f2038d6e26efeb607a1498 (patch) | |
tree | 42ef93e164b8b2a01adab30db4b33f370f4280d7 /include/asm-generic/ioctl.h | |
parent | f3dfd599af993385b40fc7a1c947afc12729bc4d (diff) | |
download | linux-8a1ab3155c2ac7fbe5f2038d6e26efeb607a1498.tar.xz |
UAPI: (Scripted) Disintegrate include/asm-generic
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'include/asm-generic/ioctl.h')
-rw-r--r-- | include/asm-generic/ioctl.h | 95 |
1 files changed, 1 insertions, 94 deletions
diff --git a/include/asm-generic/ioctl.h b/include/asm-generic/ioctl.h index 15828b2d663c..d17295b290fa 100644 --- a/include/asm-generic/ioctl.h +++ b/include/asm-generic/ioctl.h @@ -1,105 +1,12 @@ #ifndef _ASM_GENERIC_IOCTL_H #define _ASM_GENERIC_IOCTL_H -/* ioctl command encoding: 32 bits total, command in lower 16 bits, - * size of the parameter structure in the lower 14 bits of the - * upper 16 bits. - * Encoding the size of the parameter structure in the ioctl request - * is useful for catching programs compiled with old versions - * and to avoid overwriting user space outside the user buffer area. - * The highest 2 bits are reserved for indicating the ``access mode''. - * NOTE: This limits the max parameter size to 16kB -1 ! - */ +#include <uapi/asm-generic/ioctl.h> -/* - * The following is for compatibility across the various Linux - * platforms. The generic ioctl numbering scheme doesn't really enforce - * a type field. De facto, however, the top 8 bits of the lower 16 - * bits are indeed used as a type field, so we might just as well make - * this explicit here. Please be sure to use the decoding macros - * below from now on. - */ -#define _IOC_NRBITS 8 -#define _IOC_TYPEBITS 8 - -/* - * Let any architecture override either of the following before - * including this file. - */ - -#ifndef _IOC_SIZEBITS -# define _IOC_SIZEBITS 14 -#endif - -#ifndef _IOC_DIRBITS -# define _IOC_DIRBITS 2 -#endif - -#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) -#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) -#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1) -#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1) - -#define _IOC_NRSHIFT 0 -#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS) -#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS) -#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) - -/* - * Direction bits, which any architecture can choose to override - * before including this file. - */ - -#ifndef _IOC_NONE -# define _IOC_NONE 0U -#endif - -#ifndef _IOC_WRITE -# define _IOC_WRITE 1U -#endif - -#ifndef _IOC_READ -# define _IOC_READ 2U -#endif - -#define _IOC(dir,type,nr,size) \ - (((dir) << _IOC_DIRSHIFT) | \ - ((type) << _IOC_TYPESHIFT) | \ - ((nr) << _IOC_NRSHIFT) | \ - ((size) << _IOC_SIZESHIFT)) - -#ifdef __KERNEL__ /* provoke compile error for invalid uses of size argument */ extern unsigned int __invalid_size_argument_for_IOC; #define _IOC_TYPECHECK(t) \ ((sizeof(t) == sizeof(t[1]) && \ sizeof(t) < (1 << _IOC_SIZEBITS)) ? \ sizeof(t) : __invalid_size_argument_for_IOC) -#else -#define _IOC_TYPECHECK(t) (sizeof(t)) -#endif - -/* used to create numbers */ -#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0) -#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size))) -#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size))) -#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size))) -#define _IOR_BAD(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size)) -#define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size)) -#define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size)) - -/* used to decode ioctl numbers.. */ -#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) -#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK) -#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK) -#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK) - -/* ...and for the drivers/sound files... */ - -#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT) -#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT) -#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT) -#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT) -#define IOCSIZE_SHIFT (_IOC_SIZESHIFT) - #endif /* _ASM_GENERIC_IOCTL_H */ |