| /* |
| * GPL HEADER START |
| * |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 only, |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License version 2 for more details (a copy is included |
| * in the LICENSE file that accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License |
| * version 2 along with this program; If not, see |
| * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| */ |
| |
| #ifndef _IOWR |
| |
| /* On i386 and x86_64, _ASM_I386_IOCTL_H is defined by the kernel's ioctl.h, |
| * and on newer kernels this header is shared as _ASM_GENERIC_IOCTL_H. |
| * |
| * We can avoid any problems with the kernel header being included again by |
| * defining _ASM_I386_IOCTL_H here so that a later occurence of <asm/ioctl.h> |
| * does not include the kernel's ioctl.h after this one. b=14746 */ |
| #define _ASM_I386_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 |
| * The highest 2 bits are reserved for indicating the ``access mode''. |
| * NOTE: This limits the max parameter size to 16kB -1 ! |
| */ |
| |
| /* |
| * The following is for compatibility across the various Linux |
| * platforms. The i386 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 |
| #define _IOC_SIZEBITS 14 |
| #define _IOC_DIRBITS 2 |
| |
| #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. |
| */ |
| #define _IOC_NONE 0U |
| #define _IOC_WRITE 1U |
| #define _IOC_READ 2U |
| |
| #define _IOC(dir,type,nr,size) (((dir) << _IOC_DIRSHIFT) | ((type) << _IOC_TYPESHIFT) | ((nr) << _IOC_NRSHIFT) | ((size) << _IOC_SIZESHIFT)) |
| |
| /* used to create numbers */ |
| #define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0) |
| #define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size)) |
| #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size)) |
| #define _IOWR(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 /* _IOWR */ |