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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | /* * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_ARCH_H__ #define __XFS_ARCH_H__ #ifndef XFS_BIG_INUMS # error XFS_BIG_INUMS must be defined true or false #endif #ifdef __KERNEL__ #include <asm/byteorder.h> #ifdef __BIG_ENDIAN #define XFS_NATIVE_HOST 1 #else #undef XFS_NATIVE_HOST #endif #else /* __KERNEL__ */ #if __BYTE_ORDER == __BIG_ENDIAN #define XFS_NATIVE_HOST 1 #else #undef XFS_NATIVE_HOST #endif #ifdef XFS_NATIVE_HOST #define cpu_to_be16(val) ((__be16)(val)) #define cpu_to_be32(val) ((__be32)(val)) #define cpu_to_be64(val) ((__be64)(val)) #define be16_to_cpu(val) ((__uint16_t)(val)) #define be32_to_cpu(val) ((__uint32_t)(val)) #define be64_to_cpu(val) ((__uint64_t)(val)) #else #define cpu_to_be16(val) (__swab16((__uint16_t)(val))) #define cpu_to_be32(val) (__swab32((__uint32_t)(val))) #define cpu_to_be64(val) (__swab64((__uint64_t)(val))) #define be16_to_cpu(val) (__swab16((__be16)(val))) #define be32_to_cpu(val) (__swab32((__be32)(val))) #define be64_to_cpu(val) (__swab64((__be64)(val))) #endif #endif /* __KERNEL__ */ /* do we need conversion? */ #define ARCH_NOCONVERT 1 #ifdef XFS_NATIVE_HOST # define ARCH_CONVERT ARCH_NOCONVERT #else # define ARCH_CONVERT 0 #endif /* generic swapping macros */ #ifndef HAVE_SWABMACROS #define INT_SWAP16(type,var) ((typeof(type))(__swab16((__u16)(var)))) #define INT_SWAP32(type,var) ((typeof(type))(__swab32((__u32)(var)))) #define INT_SWAP64(type,var) ((typeof(type))(__swab64((__u64)(var)))) #endif #define INT_SWAP(type, var) \ ((sizeof(type) == 8) ? INT_SWAP64(type,var) : \ ((sizeof(type) == 4) ? INT_SWAP32(type,var) : \ ((sizeof(type) == 2) ? INT_SWAP16(type,var) : \ (var)))) /* * get and set integers from potentially unaligned locations */ #define INT_GET_UNALIGNED_16_BE(pointer) \ ((__u16)((((__u8*)(pointer))[0] << 8) | (((__u8*)(pointer))[1]))) #define INT_SET_UNALIGNED_16_BE(pointer,value) \ { \ ((__u8*)(pointer))[0] = (((value) >> 8) & 0xff); \ ((__u8*)(pointer))[1] = (((value) ) & 0xff); \ } /* does not return a value */ #define INT_SET(reference,arch,valueref) \ (__builtin_constant_p(valueref) ? \ (void)( (reference) = ( ((arch) != ARCH_NOCONVERT) ? (INT_SWAP((reference),(valueref))) : (valueref)) ) : \ (void)( \ ((reference) = (valueref)), \ ( ((arch) != ARCH_NOCONVERT) ? (reference) = INT_SWAP((reference),(reference)) : 0 ) \ ) \ ) /* * In directories inode numbers are stored as unaligned arrays of unsigned * 8bit integers on disk. * * For v1 directories or v2 directories that contain inode numbers that * do not fit into 32bit the array has eight members, but the first member * is always zero: * * |unused|48-55|40-47|32-39|24-31|16-23| 8-15| 0- 7| * * For v2 directories that only contain entries with inode numbers that fit * into 32bits a four-member array is used: * * |24-31|16-23| 8-15| 0- 7| */ #define XFS_GET_DIR_INO4(di) \ (((__u32)(di).i[0] << 24) | ((di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3])) #define XFS_PUT_DIR_INO4(from, di) \ do { \ (di).i[0] = (((from) & 0xff000000ULL) >> 24); \ (di).i[1] = (((from) & 0x00ff0000ULL) >> 16); \ (di).i[2] = (((from) & 0x0000ff00ULL) >> 8); \ (di).i[3] = ((from) & 0x000000ffULL); \ } while (0) #define XFS_DI_HI(di) \ (((__u32)(di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3])) #define XFS_DI_LO(di) \ (((__u32)(di).i[4] << 24) | ((di).i[5] << 16) | ((di).i[6] << 8) | ((di).i[7])) #define XFS_GET_DIR_INO8(di) \ (((xfs_ino_t)XFS_DI_LO(di) & 0xffffffffULL) | \ ((xfs_ino_t)XFS_DI_HI(di) << 32)) #define XFS_PUT_DIR_INO8(from, di) \ do { \ (di).i[0] = 0; \ (di).i[1] = (((from) & 0x00ff000000000000ULL) >> 48); \ (di).i[2] = (((from) & 0x0000ff0000000000ULL) >> 40); \ (di).i[3] = (((from) & 0x000000ff00000000ULL) >> 32); \ (di).i[4] = (((from) & 0x00000000ff000000ULL) >> 24); \ (di).i[5] = (((from) & 0x0000000000ff0000ULL) >> 16); \ (di).i[6] = (((from) & 0x000000000000ff00ULL) >> 8); \ (di).i[7] = ((from) & 0x00000000000000ffULL); \ } while (0) #endif /* __XFS_ARCH_H__ */ |