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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 | /* * linux/fs/ufs/swab.h * * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org> * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz> * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org> */ #ifndef _UFS_SWAB_H #define _UFS_SWAB_H /* * Notes: * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes * in case there are ufs implementations that have strange bytesexes, * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h * to support them. */ enum { BYTESEX_LE, BYTESEX_BE }; static __inline u64 fs64_to_cpu(struct super_block *sbp, u64 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return le64_to_cpu(n); else return be64_to_cpu(n); } static __inline u64 cpu_to_fs64(struct super_block *sbp, u64 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return cpu_to_le64(n); else return cpu_to_be64(n); } static __inline u32 fs64_add(struct super_block *sbp, u32 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le64(le64_to_cpu(*n)+d); else return *n = cpu_to_be64(be64_to_cpu(*n)+d); } static __inline u32 fs64_sub(struct super_block *sbp, u32 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le64(le64_to_cpu(*n)-d); else return *n = cpu_to_be64(be64_to_cpu(*n)-d); } static __inline u32 fs32_to_cpu(struct super_block *sbp, u32 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return le32_to_cpu(n); else return be32_to_cpu(n); } static __inline u32 cpu_to_fs32(struct super_block *sbp, u32 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return cpu_to_le32(n); else return cpu_to_be32(n); } static __inline u32 fs32_add(struct super_block *sbp, u32 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le32(le32_to_cpu(*n)+d); else return *n = cpu_to_be32(be32_to_cpu(*n)+d); } static __inline u32 fs32_sub(struct super_block *sbp, u32 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le32(le32_to_cpu(*n)-d); else return *n = cpu_to_be32(be32_to_cpu(*n)-d); } static __inline u16 fs16_to_cpu(struct super_block *sbp, u16 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return le16_to_cpu(n); else return be16_to_cpu(n); } static __inline u16 cpu_to_fs16(struct super_block *sbp, u16 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return cpu_to_le16(n); else return cpu_to_be16(n); } static __inline u16 fs16_add(struct super_block *sbp, u16 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le16(le16_to_cpu(*n)+d); else return *n = cpu_to_be16(be16_to_cpu(*n)+d); } static __inline u16 fs16_sub(struct super_block *sbp, u16 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le16(le16_to_cpu(*n)-d); else return *n = cpu_to_be16(be16_to_cpu(*n)-d); } #endif /* _UFS_SWAB_H */ |