1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/*
* Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_ATTR_SF_H__
#define __XFS_ATTR_SF_H__
/*
* Attribute storage when stored inside the inode.
*
* Small attribute lists are packed as tightly as possible so as
* to fit into the literal area of the inode.
*/
/*
* Entries are packed toward the top as tight as possible.
*/
typedef struct xfs_attr_shortform {
struct xfs_attr_sf_hdr { /* constant-structure header block */
__be16 totsize; /* total bytes in shortform list */
__u8 count; /* count of active entries */
} hdr;
struct xfs_attr_sf_entry {
__uint8_t namelen; /* actual length of name (no NULL) */
__uint8_t valuelen; /* actual length of value (no NULL) */
__uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */
__uint8_t nameval[1]; /* name & value bytes concatenated */
} list[1]; /* variable sized array */
} xfs_attr_shortform_t;
typedef struct xfs_attr_sf_hdr xfs_attr_sf_hdr_t;
typedef struct xfs_attr_sf_entry xfs_attr_sf_entry_t;
/*
* We generate this then sort it, attr_list() must return things in hash-order.
*/
typedef struct xfs_attr_sf_sort {
__uint8_t entno; /* entry number in original list */
__uint8_t namelen; /* length of name value (no null) */
__uint8_t valuelen; /* length of value */
__uint8_t flags; /* flags bits (see xfs_attr_leaf.h) */
xfs_dahash_t hash; /* this entry's hash value */
char *name; /* name value, pointer into buffer */
} xfs_attr_sf_sort_t;
#define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen) /* space name/value uses */ \
(((int)sizeof(xfs_attr_sf_entry_t)-1 + (nlen)+(vlen)))
#define XFS_ATTR_SF_ENTSIZE_MAX /* max space for name&value */ \
((1 << (NBBY*(int)sizeof(__uint8_t))) - 1)
#define XFS_ATTR_SF_ENTSIZE(sfep) /* space an entry uses */ \
((int)sizeof(xfs_attr_sf_entry_t)-1 + (sfep)->namelen+(sfep)->valuelen)
#define XFS_ATTR_SF_NEXTENTRY(sfep) /* next entry in struct */ \
((xfs_attr_sf_entry_t *)((char *)(sfep) + XFS_ATTR_SF_ENTSIZE(sfep)))
#define XFS_ATTR_SF_TOTSIZE(dp) /* total space in use */ \
(be16_to_cpu(((xfs_attr_shortform_t *) \
((dp)->i_afp->if_u1.if_data))->hdr.totsize))
#endif /* __XFS_ATTR_SF_H__ */
|
