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