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 * We generate this then sort it, attr_list() must return things in hash-order.
11 */
12 typedef struct xfs_attr_sf_sort {
13 uint8_t entno; /* entry number in original list */
14 uint8_t namelen; /* length of name value (no null) */
15 uint8_t valuelen; /* length of value */
16 uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */
17 xfs_dahash_t hash; /* this entry's hash value */
18 unsigned char *name; /* name value, pointer into buffer */
19 void *value;
20 } xfs_attr_sf_sort_t;
21
22 #define XFS_ATTR_SF_ENTSIZE_MAX /* max space for name&value */ \
23 ((1 << (NBBY*(int)sizeof(uint8_t))) - 1)
24
25 /* space name/value uses */
26 static inline int xfs_attr_sf_entsize_byname(uint8_t nlen, uint8_t vlen)
27 {
28 return sizeof(struct xfs_attr_sf_entry) + nlen + vlen;
29 }
30
31 /* space an entry uses */
32 static inline int xfs_attr_sf_entsize(struct xfs_attr_sf_entry *sfep)
33 {
34 return struct_size(sfep, nameval, sfep->namelen + sfep->valuelen);
35 }
36
37 /* first entry in the SF attr fork */
38 static inline struct xfs_attr_sf_entry *
39 xfs_attr_sf_firstentry(struct xfs_attr_sf_hdr *hdr)
40 {
41 return (struct xfs_attr_sf_entry *)(hdr + 1);
42 }
43
44 /* next entry after sfep */
45 static inline struct xfs_attr_sf_entry *
46 xfs_attr_sf_nextentry(struct xfs_attr_sf_entry *sfep)
47 {
48 return (void *)sfep + xfs_attr_sf_entsize(sfep);
49 }
50
51 /* pointer to the space after the last entry, e.g. for adding a new one */
52 static inline struct xfs_attr_sf_entry *
53 xfs_attr_sf_endptr(struct xfs_attr_sf_hdr *sf)
54 {
55 return (void *)sf + be16_to_cpu(sf->totsize);
56 }
57
58 #endif /* __XFS_ATTR_SF_H__ */
59
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