make_ext4fs/xattr.h
Jo-Philipp Wich fb5c011b49 Import make_ext4fs sources
Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
2015-04-04 22:26:16 +02:00

46 lines
1.1 KiB
C

#include <sys/types.h>
#ifndef _SYSTEM_EXTRAS_EXT4_UTILS_XATTR_H
#define _SYSTEM_EXTRAS_EXT4_UTILS_XATTR_H 1
#define EXT4_XATTR_MAGIC 0xEA020000
#define EXT4_XATTR_INDEX_SECURITY 6
struct ext4_xattr_header {
__le32 h_magic;
__le32 h_refcount;
__le32 h_blocks;
__le32 h_hash;
__le32 h_checksum;
__u32 h_reserved[3];
};
struct ext4_xattr_ibody_header {
__le32 h_magic;
};
struct ext4_xattr_entry {
__u8 e_name_len;
__u8 e_name_index;
__le16 e_value_offs;
__le32 e_value_block;
__le32 e_value_size;
__le32 e_hash;
char e_name[0];
};
#define EXT4_XATTR_PAD_BITS 2
#define EXT4_XATTR_PAD (1<<EXT4_XATTR_PAD_BITS)
#define EXT4_XATTR_ROUND (EXT4_XATTR_PAD-1)
#define EXT4_XATTR_LEN(name_len) \
(((name_len) + EXT4_XATTR_ROUND + \
sizeof(struct ext4_xattr_entry)) & ~EXT4_XATTR_ROUND)
#define EXT4_XATTR_NEXT(entry) \
((struct ext4_xattr_entry *)( \
(char *)(entry) + EXT4_XATTR_LEN((entry)->e_name_len)))
#define EXT4_XATTR_SIZE(size) \
(((size) + EXT4_XATTR_ROUND) & ~EXT4_XATTR_ROUND)
#define IS_LAST_ENTRY(entry) (*(uint32_t *)(entry) == 0)
#endif /* !_SYSTEM_EXTRAS_EXT4_UTILS_XATTR_H */