1 | /* $NetBSD: ulfs_bswap.h,v 1.8 2016/06/20 03:29:52 dholland Exp $ */ |
2 | /* from NetBSD: ufs_bswap.h,v 1.21 2016/04/29 03:05:04 christos Exp */ |
3 | |
4 | /* |
5 | * Copyright (c) 1998 Manuel Bouyer. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * |
27 | */ |
28 | |
29 | #ifndef _UFS_LFS_ULFS_BSWAP_H_ |
30 | #define _UFS_LFS_ULFS_BSWAP_H_ |
31 | |
32 | #if defined(_KERNEL_OPT) |
33 | #include "opt_lfs.h" |
34 | #endif |
35 | |
36 | #include <sys/bswap.h> |
37 | |
38 | /* Macros to access ULFS flags */ |
39 | #ifdef LFS_EI |
40 | #define ULFS_MPNEEDSWAP(lfs) ((lfs)->um_flags & ULFS_NEEDSWAP) |
41 | #define ULFS_FSNEEDSWAP(fs) ((fs)->fs_flags & FS_SWAPPED) |
42 | #define ULFS_IPNEEDSWAP(ip) ULFS_MPNEEDSWAP((ip)->i_lfs) |
43 | #else |
44 | #define ULFS_MPNEEDSWAP(ump) (__USE(ump), 0) |
45 | #define ULFS_FSNEEDSWAP(fs) (__USE(fs), 0) |
46 | #define ULFS_IPNEEDSWAP(ip) (__USE(ip), 0) |
47 | #endif |
48 | |
49 | #if !defined(_KERNEL) || defined(LFS_EI) |
50 | /* inlines for access to swapped data */ |
51 | static inline uint16_t |
52 | ulfs_rw16(uint16_t a, int ns) |
53 | { |
54 | return ((ns) ? bswap16(a) : (a)); |
55 | } |
56 | |
57 | static inline uint32_t |
58 | ulfs_rw32(uint32_t a, int ns) |
59 | { |
60 | return ((ns) ? bswap32(a) : (a)); |
61 | } |
62 | |
63 | static inline uint64_t |
64 | ulfs_rw64(uint64_t a, int ns) |
65 | { |
66 | return ((ns) ? bswap64(a) : (a)); |
67 | } |
68 | #else |
69 | #define ulfs_rw16(a, ns) (__USE(ns), (uint16_t)(a)) |
70 | #define ulfs_rw32(a, ns) (__USE(ns), (uint32_t)(a)) |
71 | #define ulfs_rw64(a, ns) (__USE(ns), (uint64_t)(a)) |
72 | #endif |
73 | |
74 | #define ulfs_add16(a, b, ns) \ |
75 | (a) = ulfs_rw16(ulfs_rw16((a), (ns)) + (b), (ns)) |
76 | #define ulfs_add32(a, b, ns) \ |
77 | (a) = ulfs_rw32(ulfs_rw32((a), (ns)) + (b), (ns)) |
78 | #define ulfs_add64(a, b, ns) \ |
79 | (a) = ulfs_rw64(ulfs_rw64((a), (ns)) + (b), (ns)) |
80 | |
81 | #endif /* !_UFS_LFS_ULFS_BSWAP_H_ */ |
82 | |