1/* $NetBSD: ufs_bswap.h,v 1.18 2006/01/29 21:42:42 dsl Exp $ */ 2 3/* 4 * Copyright (c) 1998 Manuel Bouyer. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 */ 27 28#ifndef _UFS_UFS_BSWAP_H_ 29#define _UFS_UFS_BSWAP_H_ 30 31#if defined(_KERNEL_OPT) 32#include "opt_ffs.h" 33#endif 34 35#include <sys/bswap.h> 36 37/* Macros to access UFS flags */ 38#ifdef FFS_EI 39#define UFS_MPNEEDSWAP(ump) ((ump)->um_flags & UFS_NEEDSWAP) 40#define UFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED) 41#define UFS_IPNEEDSWAP(ip) UFS_MPNEEDSWAP((ip)->i_ump) 42#else 43#define UFS_MPNEEDSWAP(ump) (0) 44#define UFS_FSNEEDSWAP(fs) (0) 45#define UFS_IPNEEDSWAP(ip) (0) 46#endif 47 48#if !defined(_KERNEL) || defined(FFS_EI) 49/* inlines for access to swapped data */ 50static inline u_int16_t 51ufs_rw16(uint16_t a, int ns) 52{ 53 return ((ns) ? bswap16(a) : (a)); 54} 55 56static inline u_int32_t 57ufs_rw32(uint32_t a, int ns) 58{ 59 return ((ns) ? bswap32(a) : (a)); 60} 61 62static inline u_int64_t 63ufs_rw64(uint64_t a, int ns) 64{ 65 return ((ns) ? bswap64(a) : (a)); 66} 67#else 68#define ufs_rw16(a, ns) ((uint16_t)(a)) 69#define ufs_rw32(a, ns) ((uint32_t)(a)) 70#define ufs_rw64(a, ns) ((uint64_t)(a)) 71#endif 72 73#define ufs_add16(a, b, ns) \ 74 (a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns)) 75#define ufs_add32(a, b, ns) \ 76 (a) = ufs_rw32(ufs_rw32((a), (ns)) + (b), (ns)) 77#define ufs_add64(a, b, ns) \ 78 (a) = ufs_rw64(ufs_rw64((a), (ns)) + (b), (ns)) 79 80#endif /* !_UFS_UFS_BSWAP_H_ */ 81