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1 | /* |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. |
4 | * |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as |
7 | * published by the Free Software Foundation. |
8 | * |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | * GNU General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
17 | */ |
18 | #ifndef __XFS_ARCH_H__ |
19 | #define __XFS_ARCH_H__ |
20 | |
21 | #ifndef XFS_BIG_INUMS |
22 | # error XFS_BIG_INUMS must be defined true or false |
23 | #endif |
24 | |
25 | #ifdef __KERNEL__ |
26 | |
27 | #include <asm/byteorder.h> |
28 | |
29 | #ifdef __BIG_ENDIAN |
30 | #define XFS_NATIVE_HOST 1 |
31 | #else |
32 | #undef XFS_NATIVE_HOST |
33 | #endif |
34 | |
35 | #else /* __KERNEL__ */ |
36 | |
37 | #if __BYTE_ORDER == __BIG_ENDIAN |
38 | #define XFS_NATIVE_HOST 1 |
39 | #else |
40 | #undef XFS_NATIVE_HOST |
41 | #endif |
42 | |
43 | #ifdef XFS_NATIVE_HOST |
44 | #define cpu_to_be16(val) ((__force __be16)(__u16)(val)) |
45 | #define cpu_to_be32(val) ((__force __be32)(__u32)(val)) |
46 | #define cpu_to_be64(val) ((__force __be64)(__u64)(val)) |
47 | #define be16_to_cpu(val) ((__force __u16)(__be16)(val)) |
48 | #define be32_to_cpu(val) ((__force __u32)(__be32)(val)) |
49 | #define be64_to_cpu(val) ((__force __u64)(__be64)(val)) |
50 | #else |
51 | #define cpu_to_be16(val) ((__force __be16)__swab16((__u16)(val))) |
52 | #define cpu_to_be32(val) ((__force __be32)__swab32((__u32)(val))) |
53 | #define cpu_to_be64(val) ((__force __be64)__swab64((__u64)(val))) |
54 | #define be16_to_cpu(val) (__swab16((__force __u16)(__be16)(val))) |
55 | #define be32_to_cpu(val) (__swab32((__force __u32)(__be32)(val))) |
56 | #define be64_to_cpu(val) (__swab64((__force __u64)(__be64)(val))) |
57 | #endif |
58 | |
59 | static inline void be16_add_cpu(__be16 *a, __s16 b) |
60 | { |
61 | *a = cpu_to_be16(be16_to_cpu(*a) + b); |
62 | } |
63 | |
64 | static inline void be32_add_cpu(__be32 *a, __s32 b) |
65 | { |
66 | *a = cpu_to_be32(be32_to_cpu(*a) + b); |
67 | } |
68 | |
69 | static inline void be64_add_cpu(__be64 *a, __s64 b) |
70 | { |
71 | *a = cpu_to_be64(be64_to_cpu(*a) + b); |
72 | } |
73 | |
74 | #endif /* __KERNEL__ */ |
75 | |
76 | /* |
77 | * get and set integers from potentially unaligned locations |
78 | */ |
79 | |
80 | #define INT_GET_UNALIGNED_16_BE(pointer) \ |
81 | ((__u16)((((__u8*)(pointer))[0] << 8) | (((__u8*)(pointer))[1]))) |
82 | #define INT_SET_UNALIGNED_16_BE(pointer,value) \ |
83 | { \ |
84 | ((__u8*)(pointer))[0] = (((value) >> 8) & 0xff); \ |
85 | ((__u8*)(pointer))[1] = (((value) ) & 0xff); \ |
86 | } |
87 | |
88 | /* |
89 | * In directories inode numbers are stored as unaligned arrays of unsigned |
90 | * 8bit integers on disk. |
91 | * |
92 | * For v1 directories or v2 directories that contain inode numbers that |
93 | * do not fit into 32bit the array has eight members, but the first member |
94 | * is always zero: |
95 | * |
96 | * |unused|48-55|40-47|32-39|24-31|16-23| 8-15| 0- 7| |
97 | * |
98 | * For v2 directories that only contain entries with inode numbers that fit |
99 | * into 32bits a four-member array is used: |
100 | * |
101 | * |24-31|16-23| 8-15| 0- 7| |
102 | */ |
103 | |
104 | #define XFS_GET_DIR_INO4(di) \ |
105 | (((__u32)(di).i[0] << 24) | ((di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3])) |
106 | |
107 | #define XFS_PUT_DIR_INO4(from, di) \ |
108 | do { \ |
109 | (di).i[0] = (((from) & 0xff000000ULL) >> 24); \ |
110 | (di).i[1] = (((from) & 0x00ff0000ULL) >> 16); \ |
111 | (di).i[2] = (((from) & 0x0000ff00ULL) >> 8); \ |
112 | (di).i[3] = ((from) & 0x000000ffULL); \ |
113 | } while (0) |
114 | |
115 | #define XFS_DI_HI(di) \ |
116 | (((__u32)(di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3])) |
117 | #define XFS_DI_LO(di) \ |
118 | (((__u32)(di).i[4] << 24) | ((di).i[5] << 16) | ((di).i[6] << 8) | ((di).i[7])) |
119 | |
120 | #define XFS_GET_DIR_INO8(di) \ |
121 | (((xfs_ino_t)XFS_DI_LO(di) & 0xffffffffULL) | \ |
122 | ((xfs_ino_t)XFS_DI_HI(di) << 32)) |
123 | |
124 | #define XFS_PUT_DIR_INO8(from, di) \ |
125 | do { \ |
126 | (di).i[0] = 0; \ |
127 | (di).i[1] = (((from) & 0x00ff000000000000ULL) >> 48); \ |
128 | (di).i[2] = (((from) & 0x0000ff0000000000ULL) >> 40); \ |
129 | (di).i[3] = (((from) & 0x000000ff00000000ULL) >> 32); \ |
130 | (di).i[4] = (((from) & 0x00000000ff000000ULL) >> 24); \ |
131 | (di).i[5] = (((from) & 0x0000000000ff0000ULL) >> 16); \ |
132 | (di).i[6] = (((from) & 0x000000000000ff00ULL) >> 8); \ |
133 | (di).i[7] = ((from) & 0x00000000000000ffULL); \ |
134 | } while (0) |
135 | |
136 | #endif /* __XFS_ARCH_H__ */ |
137 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9