1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * linux/fs/befs/endian.h 4 * 5 * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com> 6 * 7 * Partially based on similar funtions in the sysv driver. 8 */ 9 10 #ifndef LINUX_BEFS_ENDIAN 11 #define LINUX_BEFS_ENDIAN 12 13 #include <asm/byteorder.h> 14 15 static inline u64 16 fs64_to_cpu(const struct super_block *sb, fs64 n) 17 { 18 if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) 19 return le64_to_cpu((__force __le64)n); 20 else 21 return be64_to_cpu((__force __be64)n); 22 } 23 24 static inline fs64 25 cpu_to_fs64(const struct super_block *sb, u64 n) 26 { 27 if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) 28 return (__force fs64)cpu_to_le64(n); 29 else 30 return (__force fs64)cpu_to_be64(n); 31 } 32 33 static inline u32 34 fs32_to_cpu(const struct super_block *sb, fs32 n) 35 { 36 if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) 37 return le32_to_cpu((__force __le32)n); 38 else 39 return be32_to_cpu((__force __be32)n); 40 } 41 42 static inline fs32 43 cpu_to_fs32(const struct super_block *sb, u32 n) 44 { 45 if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) 46 return (__force fs32)cpu_to_le32(n); 47 else 48 return (__force fs32)cpu_to_be32(n); 49 } 50 51 static inline u16 52 fs16_to_cpu(const struct super_block *sb, fs16 n) 53 { 54 if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) 55 return le16_to_cpu((__force __le16)n); 56 else 57 return be16_to_cpu((__force __be16)n); 58 } 59 60 static inline fs16 61 cpu_to_fs16(const struct super_block *sb, u16 n) 62 { 63 if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) 64 return (__force fs16)cpu_to_le16(n); 65 else 66 return (__force fs16)cpu_to_be16(n); 67 } 68 69 /* Composite types below here */ 70 71 static inline befs_block_run 72 fsrun_to_cpu(const struct super_block *sb, befs_disk_block_run n) 73 { 74 befs_block_run run; 75 76 if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) { 77 run.allocation_group = le32_to_cpu((__force __le32)n.allocation_group); 78 run.start = le16_to_cpu((__force __le16)n.start); 79 run.len = le16_to_cpu((__force __le16)n.len); 80 } else { 81 run.allocation_group = be32_to_cpu((__force __be32)n.allocation_group); 82 run.start = be16_to_cpu((__force __be16)n.start); 83 run.len = be16_to_cpu((__force __be16)n.len); 84 } 85 return run; 86 } 87 88 static inline befs_disk_block_run 89 cpu_to_fsrun(const struct super_block *sb, befs_block_run n) 90 { 91 befs_disk_block_run run; 92 93 if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) { 94 run.allocation_group = cpu_to_le32(n.allocation_group); 95 run.start = cpu_to_le16(n.start); 96 run.len = cpu_to_le16(n.len); 97 } else { 98 run.allocation_group = cpu_to_be32(n.allocation_group); 99 run.start = cpu_to_be16(n.start); 100 run.len = cpu_to_be16(n.len); 101 } 102 return run; 103 } 104 105 static inline befs_data_stream 106 fsds_to_cpu(const struct super_block *sb, const befs_disk_data_stream *n) 107 { 108 befs_data_stream data; 109 int i; 110 111 for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i) 112 data.direct[i] = fsrun_to_cpu(sb, n->direct[i]); 113 114 data.max_direct_range = fs64_to_cpu(sb, n->max_direct_range); 115 data.indirect = fsrun_to_cpu(sb, n->indirect); 116 data.max_indirect_range = fs64_to_cpu(sb, n->max_indirect_range); 117 data.double_indirect = fsrun_to_cpu(sb, n->double_indirect); 118 data.max_double_indirect_range = fs64_to_cpu(sb, 119 n-> 120 max_double_indirect_range); 121 data.size = fs64_to_cpu(sb, n->size); 122 123 return data; 124 } 125 126 #endif //LINUX_BEFS_ENDIAN 127