xattr.h

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#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 */