1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
4  * All Rights Reserved.
5  */
6 #ifndef __XFS_ATTR_SF_H__
7 #define	__XFS_ATTR_SF_H__
8 
9 /*
10  * Attribute storage when stored inside the inode.
11  *
12  * Small attribute lists are packed as tightly as possible so as
13  * to fit into the literal area of the inode.
14  */
15 typedef struct xfs_attr_sf_hdr xfs_attr_sf_hdr_t;
16 typedef struct xfs_attr_sf_entry xfs_attr_sf_entry_t;
17 
18 /*
19  * We generate this then sort it, attr_list() must return things in hash-order.
20  */
21 typedef struct xfs_attr_sf_sort {
22 	uint8_t		entno;		/* entry number in original list */
23 	uint8_t		namelen;	/* length of name value (no null) */
24 	uint8_t		valuelen;	/* length of value */
25 	uint8_t		flags;		/* flags bits (see xfs_attr_leaf.h) */
26 	xfs_dahash_t	hash;		/* this entry's hash value */
27 	unsigned char	*name;		/* name value, pointer into buffer */
28 } xfs_attr_sf_sort_t;
29 
30 #define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen)	/* space name/value uses */ \
31 	(((int)sizeof(xfs_attr_sf_entry_t)-1 + (nlen)+(vlen)))
32 #define XFS_ATTR_SF_ENTSIZE_MAX			/* max space for name&value */ \
33 	((1 << (NBBY*(int)sizeof(uint8_t))) - 1)
34 #define XFS_ATTR_SF_ENTSIZE(sfep)		/* space an entry uses */ \
35 	((int)sizeof(xfs_attr_sf_entry_t)-1 + (sfep)->namelen+(sfep)->valuelen)
36 #define XFS_ATTR_SF_NEXTENTRY(sfep)		/* next entry in struct */ \
37 	((xfs_attr_sf_entry_t *)((char *)(sfep) + XFS_ATTR_SF_ENTSIZE(sfep)))
38 #define XFS_ATTR_SF_TOTSIZE(dp)			/* total space in use */ \
39 	(be16_to_cpu(((xfs_attr_shortform_t *)	\
40 		((dp)->i_afp->if_u1.if_data))->hdr.totsize))
41 
42 #endif	/* __XFS_ATTR_SF_H__ */
43