forked from luck/tmp_suning_uos_patched
a9721f3152
split the data structures that exist in host- and disk-endian variants, annotate the fields of disk-endian ones, propagate changes. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/*
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* linux/fs/befs/endian.h
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*
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* Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
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*
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* Partially based on similar funtions in the sysv driver.
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*/
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#ifndef LINUX_BEFS_ENDIAN
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#define LINUX_BEFS_ENDIAN
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#include <linux/byteorder/generic.h>
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static inline u64
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fs64_to_cpu(const struct super_block *sb, fs64 n)
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{
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if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
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return le64_to_cpu((__force __le64)n);
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else
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return be64_to_cpu((__force __be64)n);
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}
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static inline fs64
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cpu_to_fs64(const struct super_block *sb, u64 n)
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{
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if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
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return (__force fs64)cpu_to_le64(n);
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else
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return (__force fs64)cpu_to_be64(n);
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}
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static inline u32
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fs32_to_cpu(const struct super_block *sb, fs32 n)
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{
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if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
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return le32_to_cpu((__force __le32)n);
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else
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return be32_to_cpu((__force __be32)n);
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}
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static inline fs32
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cpu_to_fs32(const struct super_block *sb, u32 n)
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{
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if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
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return (__force fs32)cpu_to_le32(n);
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else
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return (__force fs32)cpu_to_be32(n);
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}
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static inline u16
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fs16_to_cpu(const struct super_block *sb, fs16 n)
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{
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if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
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return le16_to_cpu((__force __le16)n);
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else
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return be16_to_cpu((__force __be16)n);
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}
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static inline fs16
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cpu_to_fs16(const struct super_block *sb, u16 n)
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{
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if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
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return (__force fs16)cpu_to_le16(n);
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else
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return (__force fs16)cpu_to_be16(n);
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}
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/* Composite types below here */
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static inline befs_block_run
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fsrun_to_cpu(const struct super_block *sb, befs_disk_block_run n)
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{
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befs_block_run run;
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if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
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run.allocation_group = le32_to_cpu((__force __le32)n.allocation_group);
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run.start = le16_to_cpu((__force __le16)n.start);
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run.len = le16_to_cpu((__force __le16)n.len);
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} else {
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run.allocation_group = be32_to_cpu((__force __be32)n.allocation_group);
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run.start = be16_to_cpu((__force __be16)n.start);
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run.len = be16_to_cpu((__force __be16)n.len);
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}
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return run;
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}
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static inline befs_disk_block_run
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cpu_to_fsrun(const struct super_block *sb, befs_block_run n)
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{
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befs_disk_block_run run;
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if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
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run.allocation_group = cpu_to_le32(n.allocation_group);
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run.start = cpu_to_le16(n.start);
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run.len = cpu_to_le16(n.len);
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} else {
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run.allocation_group = cpu_to_be32(n.allocation_group);
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run.start = cpu_to_be16(n.start);
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run.len = cpu_to_be16(n.len);
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}
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return run;
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}
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static inline befs_data_stream
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fsds_to_cpu(const struct super_block *sb, befs_disk_data_stream n)
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{
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befs_data_stream data;
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int i;
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for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i)
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data.direct[i] = fsrun_to_cpu(sb, n.direct[i]);
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data.max_direct_range = fs64_to_cpu(sb, n.max_direct_range);
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data.indirect = fsrun_to_cpu(sb, n.indirect);
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data.max_indirect_range = fs64_to_cpu(sb, n.max_indirect_range);
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data.double_indirect = fsrun_to_cpu(sb, n.double_indirect);
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data.max_double_indirect_range = fs64_to_cpu(sb,
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n.
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max_double_indirect_range);
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data.size = fs64_to_cpu(sb, n.size);
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return data;
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}
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#endif //LINUX_BEFS_ENDIAN
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