^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/fs/ufs/swab.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifndef _UFS_SWAB_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define _UFS_SWAB_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Notes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * in case there are ufs implementations that have strange bytesexes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * to support them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) BYTESEX_LE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) BYTESEX_BE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static inline u64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) fs64_to_cpu(struct super_block *sbp, __fs64 n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return le64_to_cpu((__force __le64)n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return be64_to_cpu((__force __be64)n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static inline __fs64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) cpu_to_fs64(struct super_block *sbp, u64 n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return (__force __fs64)cpu_to_le64(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return (__force __fs64)cpu_to_be64(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static inline u32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) fs32_to_cpu(struct super_block *sbp, __fs32 n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return le32_to_cpu((__force __le32)n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return be32_to_cpu((__force __be32)n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static inline __fs32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) cpu_to_fs32(struct super_block *sbp, u32 n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return (__force __fs32)cpu_to_le32(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return (__force __fs32)cpu_to_be32(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) fs32_add(struct super_block *sbp, __fs32 *n, int d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) le32_add_cpu((__le32 *)n, d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) be32_add_cpu((__be32 *)n, d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) fs32_sub(struct super_block *sbp, __fs32 *n, int d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) le32_add_cpu((__le32 *)n, -d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) be32_add_cpu((__be32 *)n, -d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static inline u16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) fs16_to_cpu(struct super_block *sbp, __fs16 n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return le16_to_cpu((__force __le16)n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return be16_to_cpu((__force __be16)n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static inline __fs16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) cpu_to_fs16(struct super_block *sbp, u16 n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return (__force __fs16)cpu_to_le16(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return (__force __fs16)cpu_to_be16(n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) fs16_add(struct super_block *sbp, __fs16 *n, int d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) le16_add_cpu((__le16 *)n, d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) be16_add_cpu((__be16 *)n, d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) fs16_sub(struct super_block *sbp, __fs16 *n, int d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) le16_add_cpu((__le16 *)n, -d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) be16_add_cpu((__be16 *)n, -d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #endif /* _UFS_SWAB_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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