- heavily copied from register_persistant_environment which was Signed-off-by: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Eric Bénard <eric@eukrea.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
#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 */
|