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#ifndef _ENVFS_H
#define _ENVFS_H
#ifdef __BAREBOX__
#include <asm/byteorder.h>
#endif
#define ENVFS_MAJOR 1
#define ENVFS_MINOR 0
#define ENVFS_MAGIC 0x798fba79 /* some random number */
#define ENVFS_INODE_MAGIC 0x67a8c78d
#define ENVFS_INODE_END_MAGIC 0x68a8c78d
#define ENVFS_END_MAGIC 0x6a87d6cd
#define ENVFS_SIGNATURE "barebox envfs"
struct envfs_inode {
uint32_t magic; /* ENVFS_INODE_MAGIC */
uint32_t size; /* data size in bytes */
uint32_t headerlen; /* The length of the filename _including_ a trailing 0 */
char data[0]; /* The filename (zero terminated) + padding to 4 byte boundary
* followed by the data for this inode.
* The next inode follows after the data + padding to 4 byte
* boundary.
*/
};
struct envfs_inode_end {
uint32_t magic; /* ENVFS_INODE_END_MAGIC */
uint32_t mode; /* file mode */
};
/*
* Superblock information at the beginning of the FS.
*/
struct envfs_super {
uint32_t magic; /* ENVFS_MAGIC */
uint32_t priority;
uint32_t crc; /* crc for the data */
uint32_t size; /* size of data */
uint8_t major; /* major */
uint8_t minor; /* minor */
uint16_t future; /* reserved for future use */
uint32_t flags; /* feature flags */
uint32_t sb_crc; /* crc for the superblock */
};
#ifdef __BAREBOX__
# ifdef __LITTLE_ENDIAN
# define ENVFS_ORDER_LITTLE
# elif defined __BIG_ENDIAN
# define ENVFS_ORDER_BIG
# else
# error "could not determine byte order"
# endif
#else
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define ENVFS_ORDER_LITTLE
# elif __BYTE_ORDER == __BIG_ENDIAN
# define ENVFS_ORDER_BIG
# else
# error "could not determine byte order"
# endif
#endif
#ifdef ENVFS_ORDER_LITTLE
#define ENVFS_16(x) (x)
#define ENVFS_24(x) (x)
#define ENVFS_32(x) (x)
#define ENVFS_GET_NAMELEN(x) ((x)->namelen)
#define ENVFS_GET_OFFSET(x) ((x)->offset)
#define ENVFS_SET_OFFSET(x,y) ((x)->offset = (y))
#define ENVFS_SET_NAMELEN(x,y) ((x)->namelen = (y))
#elif defined ENVFS_ORDER_BIG
#ifdef __KERNEL__
#define ENVFS_16(x) swab16(x)
#define ENVFS_24(x) ((swab32(x)) >> 8)
#define ENVFS_32(x) swab32(x)
#else /* not __KERNEL__ */
#define ENVFS_16(x) bswap_16(x)
#define ENVFS_24(x) ((bswap_32(x)) >> 8)
#define ENVFS_32(x) bswap_32(x)
#endif /* not __KERNEL__ */
#define ENVFS_GET_NAMELEN(x) ENVFS_32(((x)->namelen))
#define ENVFS_GET_OFFSET(x) ENVFS_32(((x)->offset))
#define ENVFS_SET_NAMELEN(x,y)((x)->offset = ENVFS_32((y)))
#define ENVFS_SET_OFFSET(x,y) ((x)->namelen = ENVFS_32((y)))
#else
#error "__BYTE_ORDER must be __LITTLE_ENDIAN or __BIG_ENDIAN"
#endif
#define ENV_FLAG_NO_OVERWRITE (1 << 0)
int envfs_load(char *filename, char *dirname, unsigned flags);
int envfs_save(char *filename, char *dirname);
/* defaults to /dev/env0 */
extern char *default_environment_path;
int envfs_register_partition(const char *devname, unsigned int partnr);
#endif /* _ENVFS_H */
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