xattr.h

   1 #include <sys/types.h>
   2
   3 #ifndef _SYSTEM_EXTRAS_EXT4_UTILS_XATTR_H
   4 #define _SYSTEM_EXTRAS_EXT4_UTILS_XATTR_H 1
   5
   6 #define EXT4_XATTR_MAGIC 0xEA020000
   7 #define EXT4_XATTR_INDEX_SECURITY 6
   8
   9 struct ext4_xattr_header {
  10     __le32  h_magic;
  11     __le32  h_refcount;
  12     __le32  h_blocks;
  13     __le32  h_hash;
  14     __le32  h_checksum;
  15     __u32   h_reserved[3];
  16 };
  17
  18 struct ext4_xattr_ibody_header {
  19     __le32  h_magic;
  20 };
  21
  22 struct ext4_xattr_entry {
  23     __u8 e_name_len;
  24     __u8 e_name_index;
  25     __le16 e_value_offs;
  26     __le32 e_value_block;
  27     __le32 e_value_size;
  28     __le32 e_hash;
  29     char e_name[0];
  30 };
  31
  32 #define EXT4_XATTR_PAD_BITS 2
  33 #define EXT4_XATTR_PAD (1<<EXT4_XATTR_PAD_BITS)
  34 #define EXT4_XATTR_ROUND (EXT4_XATTR_PAD-1)
  35 #define EXT4_XATTR_LEN(name_len) \
  36     (((name_len) + EXT4_XATTR_ROUND + \
  37     sizeof(struct ext4_xattr_entry)) & ~EXT4_XATTR_ROUND)
  38 #define EXT4_XATTR_NEXT(entry) \
  39     ((struct ext4_xattr_entry *)( \
  40      (char *)(entry) + EXT4_XATTR_LEN((entry)->e_name_len)))
  41 #define EXT4_XATTR_SIZE(size) \
  42     (((size) + EXT4_XATTR_ROUND) & ~EXT4_XATTR_ROUND)
  43 #define IS_LAST_ENTRY(entry) (*(uint32_t *)(entry) == 0)
  44
  45 #endif /* !_SYSTEM_EXTRAS_EXT4_UTILS_XATTR_H */