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DDF: add endian-safe typedefs 

This adds typedefs for big-endian numbers. This will hopefully
reduce the number of endianness bugs I make.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
mwilck@arcor.de 2013-07-21 19:28:19 +02:00 committed by NeilBrown
parent 5c41684539
commit 4d1bdc1840
1 changed files with 36 additions and 0 deletions
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36
super-ddf.c
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@ -58,6 +58,42 @@ unsigned long crc32(
*
*/
typedef struct __be16 {
__u16 _v16;
} be16;
#define be16_eq(x, y) ((x)._v16 == (y)._v16)
typedef struct __be32 {
__u32 _v32;
} be32;
#define be32_eq(x, y) ((x)._v32 == (y)._v32)
typedef struct __be64 {
__u64 _v64;
} be64;
#define be64_eq(x, y) ((x)._v64 == (y)._v64)
#define be16_to_cpu(be) __be16_to_cpu((be)._v16)
static inline be16 cpu_to_be16(__u16 x)
{
be16 be = { ._v16 = __cpu_to_be16(x) };
return be;
}
#define be32_to_cpu(be) __be32_to_cpu((be)._v32)
static inline be32 cpu_to_be32(__u32 x)
{
be32 be = { ._v32 = __cpu_to_be32(x) };
return be;
}
#define be64_to_cpu(be) __be64_to_cpu((be)._v64)
static inline be64 cpu_to_be64(__u64 x)
{
be64 be = { ._v64 = __cpu_to_be64(x) };
return be;
}
/* Primary Raid Level (PRL) */
#define DDF_RAID0 0x00
#define DDF_RAID1 0x01