1 files changed, 69 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/ext2_ext_attr.h b/e2fsprogs/ext2fs/ext2_ext_attr.h
new file mode 100644
index 000000000..23444c508
--- /dev/null
+++ b/e2fsprogs/ext2fs/ext2_ext_attr.h
@@ -0,0 +1,69 @@
+/*
+  File: linux/ext2_ext_attr.h
+
+  On-disk format of extended attributes for the ext2 filesystem.
+
+  (C) 2000 Andreas Gruenbacher, <a.gruenbacher@computer.org>
+*/
+
+/* Magic value in attribute blocks */
+#define EXT2_EXT_ATTR_MAGIC_v1          0xEA010000
+#define EXT2_EXT_ATTR_MAGIC             0xEA020000
+
+/* Maximum number of references to one attribute block */
+#define EXT2_EXT_ATTR_REFCOUNT_MAX      1024
+
+struct ext2_ext_attr_header {
+        __u32   h_magic;        /* magic number for identification */
+        __u32   h_refcount;     /* reference count */
+        __u32   h_blocks;       /* number of disk blocks used */
+        __u32   h_hash;         /* hash value of all attributes */
+        __u32   h_reserved[4];  /* zero right now */
+};
+
+struct ext2_ext_attr_entry {
+        __u8    e_name_len;     /* length of name */
+        __u8    e_name_index;   /* attribute name index */
+        __u16   e_value_offs;   /* offset in disk block of value */
+        __u32   e_value_block;  /* disk block attribute is stored on (n/i) */
+        __u32   e_value_size;   /* size of attribute value */
+        __u32   e_hash;         /* hash value of name and value */
+#if 0
+        char    e_name[0];      /* attribute name */
+#endif
+};
+
+#define EXT2_EXT_ATTR_PAD_BITS          2
+#define EXT2_EXT_ATTR_PAD               (1<<EXT2_EXT_ATTR_PAD_BITS)
+#define EXT2_EXT_ATTR_ROUND             (EXT2_EXT_ATTR_PAD-1)
+#define EXT2_EXT_ATTR_LEN(name_len) \
+        (((name_len) + EXT2_EXT_ATTR_ROUND + \
+        sizeof(struct ext2_ext_attr_entry)) & ~EXT2_EXT_ATTR_ROUND)
+#define EXT2_EXT_ATTR_NEXT(entry) \
+        ( (struct ext2_ext_attr_entry *)( \
+          (char *)(entry) + EXT2_EXT_ATTR_LEN((entry)->e_name_len)) )
+#define EXT2_EXT_ATTR_SIZE(size) \
+        (((size) + EXT2_EXT_ATTR_ROUND) & ~EXT2_EXT_ATTR_ROUND)
+#define EXT2_EXT_IS_LAST_ENTRY(entry) (*((__u32 *)(entry)) == 0UL)
+#define EXT2_EXT_ATTR_NAME(entry) \
+        (((char *) (entry)) + sizeof(struct ext2_ext_attr_entry))
+#define EXT2_XATTR_LEN(name_len) \
+        (((name_len) + EXT2_EXT_ATTR_ROUND + \
+        sizeof(struct ext2_xattr_entry)) & ~EXT2_EXT_ATTR_ROUND)
+#define EXT2_XATTR_SIZE(size) \
+        (((size) + EXT2_EXT_ATTR_ROUND) & ~EXT2_EXT_ATTR_ROUND)
+
+#ifdef __KERNEL__
+# ifdef CONFIG_EXT2_FS_EXT_ATTR
+extern int ext2_get_ext_attr(struct inode *, const char *, char *, size_t, int);
+extern int ext2_set_ext_attr(struct inode *, const char *, char *, size_t, int);
+extern void ext2_ext_attr_free_inode(struct inode *inode);
+extern void ext2_ext_attr_put_super(struct super_block *sb);
+extern int ext2_ext_attr_init(void);
+extern void ext2_ext_attr_done(void);
+# else
+#  define ext2_get_ext_attr NULL
+#  define ext2_set_ext_attr NULL
+# endif
+#endif  /* __KERNEL__ */
+