/* vi: set sw=4 ts=4: *//*  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	1024struct 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 */};#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)