projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | /* |
| 3 | * linux/fs/ufs/swab.h | |
| 4 | * | |
| 5 | * Copyright (C) 1997, 1998 Francois-Rene Rideau <[email protected]> | |
| 6 | * Copyright (C) 1998 Jakub Jelinek <[email protected]> | |
| 7 | * Copyright (C) 2001 Christoph Hellwig <[email protected]> | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef _UFS_SWAB_H | |
| 11 | #define _UFS_SWAB_H | |
| 12 | ||
| 13 | /* | |
| 14 | * Notes: | |
| 15 | * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes | |
| 16 | * in case there are ufs implementations that have strange bytesexes, | |
| 17 | * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h | |
| 18 | * to support them. | |
| 19 | */ | |
| 20 | ||
| 21 | enum { | |
| 22 | BYTESEX_LE, | |
| 23 | BYTESEX_BE | |
| 24 | }; | |
| 25 | ||
| 26 | static inline u64 | |
| 27 | fs64_to_cpu(struct super_block *sbp, __fs64 n) | |
| 28 | { | |
| 29 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 30 | return le64_to_cpu((__force __le64)n); | |
| 31 | else | |
| 32 | return be64_to_cpu((__force __be64)n); | |
| 33 | } | |
| 34 | ||
| 35 | static inline __fs64 | |
| 36 | cpu_to_fs64(struct super_block *sbp, u64 n) | |
| 37 | { | |
| 38 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 39 | return (__force __fs64)cpu_to_le64(n); | |
| 40 | else | |
| 41 | return (__force __fs64)cpu_to_be64(n); | |
| 42 | } | |
| 43 | ||
| 36a53ddf | 44 | static inline u32 |
| 1da177e4 LT |
45 | fs32_to_cpu(struct super_block *sbp, __fs32 n) |
| 46 | { | |
| 47 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 48 | return le32_to_cpu((__force __le32)n); | |
| 49 | else | |
| 50 | return be32_to_cpu((__force __be32)n); | |
| 51 | } | |
| 52 | ||
| 53 | static inline __fs32 | |
| 54 | cpu_to_fs32(struct super_block *sbp, u32 n) | |
| 55 | { | |
| 56 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 57 | return (__force __fs32)cpu_to_le32(n); | |
| 58 | else | |
| 59 | return (__force __fs32)cpu_to_be32(n); | |
| 60 | } | |
| 61 | ||
| 62 | static inline void | |
| 63 | fs32_add(struct super_block *sbp, __fs32 *n, int d) | |
| 64 | { | |
| 65 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 3c5afae2 | 66 | le32_add_cpu((__le32 *)n, d); |
| 1da177e4 | 67 | else |
| 3c5afae2 | 68 | be32_add_cpu((__be32 *)n, d); |
| 1da177e4 LT |
69 | } |
| 70 | ||
| 71 | static inline void | |
| 72 | fs32_sub(struct super_block *sbp, __fs32 *n, int d) | |
| 73 | { | |
| 74 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 3c5afae2 | 75 | le32_add_cpu((__le32 *)n, -d); |
| 1da177e4 | 76 | else |
| 3c5afae2 | 77 | be32_add_cpu((__be32 *)n, -d); |
| 1da177e4 LT |
78 | } |
| 79 | ||
| 80 | static inline u16 | |
| 81 | fs16_to_cpu(struct super_block *sbp, __fs16 n) | |
| 82 | { | |
| 83 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 84 | return le16_to_cpu((__force __le16)n); | |
| 85 | else | |
| 86 | return be16_to_cpu((__force __be16)n); | |
| 87 | } | |
| 88 | ||
| 89 | static inline __fs16 | |
| 90 | cpu_to_fs16(struct super_block *sbp, u16 n) | |
| 91 | { | |
| 92 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 93 | return (__force __fs16)cpu_to_le16(n); | |
| 94 | else | |
| 95 | return (__force __fs16)cpu_to_be16(n); | |
| 96 | } | |
| 97 | ||
| 98 | static inline void | |
| 99 | fs16_add(struct super_block *sbp, __fs16 *n, int d) | |
| 100 | { | |
| 101 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 3c5afae2 | 102 | le16_add_cpu((__le16 *)n, d); |
| 1da177e4 | 103 | else |
| 3c5afae2 | 104 | be16_add_cpu((__be16 *)n, d); |
| 1da177e4 LT |
105 | } |
| 106 | ||
| 107 | static inline void | |
| 108 | fs16_sub(struct super_block *sbp, __fs16 *n, int d) | |
| 109 | { | |
| 110 | if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) | |
| 3c5afae2 | 111 | le16_add_cpu((__le16 *)n, -d); |
| 1da177e4 | 112 | else |
| 3c5afae2 | 113 | be16_add_cpu((__be16 *)n, -d); |
| 1da177e4 LT |
114 | } |
| 115 | ||
| 116 | #endif /* _UFS_SWAB_H */ |