From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- fs/ufs/swab.h | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 fs/ufs/swab.h (limited to 'fs/ufs/swab.h') diff --git a/fs/ufs/swab.h b/fs/ufs/swab.h new file mode 100644 index 000000000..a0e1d8c82 --- /dev/null +++ b/fs/ufs/swab.h @@ -0,0 +1,116 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * linux/fs/ufs/swab.h + * + * Copyright (C) 1997, 1998 Francois-Rene Rideau + * Copyright (C) 1998 Jakub Jelinek + * Copyright (C) 2001 Christoph Hellwig + */ + +#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, __fs64 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return le64_to_cpu((__force __le64)n); + else + return be64_to_cpu((__force __be64)n); +} + +static inline __fs64 +cpu_to_fs64(struct super_block *sbp, u64 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return (__force __fs64)cpu_to_le64(n); + else + return (__force __fs64)cpu_to_be64(n); +} + +static inline u32 +fs32_to_cpu(struct super_block *sbp, __fs32 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return le32_to_cpu((__force __le32)n); + else + return be32_to_cpu((__force __be32)n); +} + +static inline __fs32 +cpu_to_fs32(struct super_block *sbp, u32 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return (__force __fs32)cpu_to_le32(n); + else + return (__force __fs32)cpu_to_be32(n); +} + +static inline void +fs32_add(struct super_block *sbp, __fs32 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + le32_add_cpu((__le32 *)n, d); + else + be32_add_cpu((__be32 *)n, d); +} + +static inline void +fs32_sub(struct super_block *sbp, __fs32 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + le32_add_cpu((__le32 *)n, -d); + else + be32_add_cpu((__be32 *)n, -d); +} + +static inline u16 +fs16_to_cpu(struct super_block *sbp, __fs16 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return le16_to_cpu((__force __le16)n); + else + return be16_to_cpu((__force __be16)n); +} + +static inline __fs16 +cpu_to_fs16(struct super_block *sbp, u16 n) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + return (__force __fs16)cpu_to_le16(n); + else + return (__force __fs16)cpu_to_be16(n); +} + +static inline void +fs16_add(struct super_block *sbp, __fs16 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + le16_add_cpu((__le16 *)n, d); + else + be16_add_cpu((__be16 *)n, d); +} + +static inline void +fs16_sub(struct super_block *sbp, __fs16 *n, int d) +{ + if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) + le16_add_cpu((__le16 *)n, -d); + else + be16_add_cpu((__be16 *)n, -d); +} + +#endif /* _UFS_SWAB_H */ -- cgit v1.2.3