1*5978408cSSascha Wildner /* $NetBSD: ufs_bswap.h,v 1.13 2003/10/05 17:48:50 bouyer Exp $ */
2*5978408cSSascha Wildner
3*5978408cSSascha Wildner /*-
4*5978408cSSascha Wildner * SPDX-License-Identifier: BSD-2-Clause-NetBSD
5*5978408cSSascha Wildner *
6*5978408cSSascha Wildner * Copyright (c) 1998 Manuel Bouyer.
7*5978408cSSascha Wildner *
8*5978408cSSascha Wildner * Redistribution and use in source and binary forms, with or without
9*5978408cSSascha Wildner * modification, are permitted provided that the following conditions
10*5978408cSSascha Wildner * are met:
11*5978408cSSascha Wildner * 1. Redistributions of source code must retain the above copyright
12*5978408cSSascha Wildner * notice, this list of conditions and the following disclaimer.
13*5978408cSSascha Wildner * 2. Redistributions in binary form must reproduce the above copyright
14*5978408cSSascha Wildner * notice, this list of conditions and the following disclaimer in the
15*5978408cSSascha Wildner * documentation and/or other materials provided with the distribution.
16*5978408cSSascha Wildner *
17*5978408cSSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18*5978408cSSascha Wildner * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19*5978408cSSascha Wildner * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20*5978408cSSascha Wildner * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21*5978408cSSascha Wildner * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22*5978408cSSascha Wildner * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23*5978408cSSascha Wildner * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24*5978408cSSascha Wildner * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25*5978408cSSascha Wildner * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26*5978408cSSascha Wildner * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27*5978408cSSascha Wildner *
28*5978408cSSascha Wildner * $FreeBSD: head/usr.sbin/makefs/ffs/ufs_bswap.h 326276 2017-11-27 15:37:16Z pfg $
29*5978408cSSascha Wildner */
30*5978408cSSascha Wildner
31*5978408cSSascha Wildner #ifndef _UFS_UFS_BSWAP_H_
32*5978408cSSascha Wildner #define _UFS_UFS_BSWAP_H_
33*5978408cSSascha Wildner
34*5978408cSSascha Wildner #if defined(_KERNEL_OPT)
35*5978408cSSascha Wildner #include "opt_ffs.h"
36*5978408cSSascha Wildner #endif
37*5978408cSSascha Wildner
38*5978408cSSascha Wildner #include <sys/endian.h>
39*5978408cSSascha Wildner
40*5978408cSSascha Wildner #include "makefs.h"
41*5978408cSSascha Wildner
42*5978408cSSascha Wildner /* Macros to access UFS flags */
43*5978408cSSascha Wildner #ifdef FFS_EI
44*5978408cSSascha Wildner #define UFS_MPNEEDSWAP(mp) (VFSTOUFS(mp)->um_flags & UFS_NEEDSWAP)
45*5978408cSSascha Wildner #define UFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED)
46*5978408cSSascha Wildner #define UFS_IPNEEDSWAP(ip) UFS_MPNEEDSWAP(ITOV(ip)->v_mount)
47*5978408cSSascha Wildner #else
48*5978408cSSascha Wildner #define UFS_MPNEEDSWAP(mp) (0)
49*5978408cSSascha Wildner #define UFS_FSNEEDSWAP(fs) (0)
50*5978408cSSascha Wildner #define UFS_IPNEEDSWAP(ip) (0)
51*5978408cSSascha Wildner #endif
52*5978408cSSascha Wildner
53*5978408cSSascha Wildner #if !defined(_KERNEL) || defined(FFS_EI)
54*5978408cSSascha Wildner /* inlines for access to swapped data */
55*5978408cSSascha Wildner static __inline u_int16_t
ufs_rw16(u_int16_t a,int ns)56*5978408cSSascha Wildner ufs_rw16(u_int16_t a, int ns)
57*5978408cSSascha Wildner {
58*5978408cSSascha Wildner return ((ns) ? bswap16(a) : (a));
59*5978408cSSascha Wildner }
60*5978408cSSascha Wildner static __inline u_int32_t
ufs_rw32(u_int32_t a,int ns)61*5978408cSSascha Wildner ufs_rw32(u_int32_t a, int ns)
62*5978408cSSascha Wildner {
63*5978408cSSascha Wildner return ((ns) ? bswap32(a) : (a));
64*5978408cSSascha Wildner }
65*5978408cSSascha Wildner static __inline u_int64_t
ufs_rw64(u_int64_t a,int ns)66*5978408cSSascha Wildner ufs_rw64(u_int64_t a, int ns)
67*5978408cSSascha Wildner {
68*5978408cSSascha Wildner return ((ns) ? bswap64(a) : (a));
69*5978408cSSascha Wildner }
70*5978408cSSascha Wildner #else
71*5978408cSSascha Wildner #define ufs_rw16(a, ns) ((uint16_t)(a))
72*5978408cSSascha Wildner #define ufs_rw32(a, ns) ((uint32_t)(a))
73*5978408cSSascha Wildner #define ufs_rw64(a, ns) ((uint64_t)(a))
74*5978408cSSascha Wildner #endif
75*5978408cSSascha Wildner
76*5978408cSSascha Wildner #define ufs_add16(a, b, ns) \
77*5978408cSSascha Wildner (a) = ufs_rw16(ufs_rw16((a), (ns)) + (b), (ns))
78*5978408cSSascha Wildner #define ufs_add32(a, b, ns) \
79*5978408cSSascha Wildner (a) = ufs_rw32(ufs_rw32((a), (ns)) + (b), (ns))
80*5978408cSSascha Wildner #define ufs_add64(a, b, ns) \
81*5978408cSSascha Wildner (a) = ufs_rw64(ufs_rw64((a), (ns)) + (b), (ns))
82*5978408cSSascha Wildner
83*5978408cSSascha Wildner #endif /* !_UFS_UFS_BSWAP_H_ */
84