1#ifndef XATTR_H
2#define XATTR_H
3/*
4 * Create a squashfs filesystem.  This is a highly compressed read only
5 * filesystem.
6 *
7 * Copyright (c) 2010, 2012, 2013, 2014
8 * Phillip Lougher <phillip@squashfs.org.uk>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2,
13 * or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 * xattr.h
25 */
26
27#define XATTR_VALUE_OOL		SQUASHFS_XATTR_VALUE_OOL
28#define XATTR_PREFIX_MASK	SQUASHFS_XATTR_PREFIX_MASK
29
30#define XATTR_VALUE_OOL_SIZE	sizeof(long long)
31
32/* maximum size of xattr value data that will be inlined */
33#define XATTR_INLINE_MAX 	128
34
35/* the target size of an inode's xattr name:value list.  If it
36 * exceeds this, then xattr value data will be successively out of lined
37 * until it meets the target */
38#define XATTR_TARGET_MAX	65536
39
40#define IS_XATTR(a)		(a != SQUASHFS_INVALID_XATTR)
41
42struct xattr_list {
43	char			*name;
44	char			*full_name;
45	int			size;
46	int			vsize;
47	void			*value;
48	int			type;
49	long long		ool_value;
50	unsigned short		vchecksum;
51	struct xattr_list	*vnext;
52};
53
54struct dupl_id {
55	struct xattr_list	*xattr_list;
56	int			xattrs;
57	int			xattr_id;
58	struct dupl_id		*next;
59};
60
61struct prefix {
62	char			*prefix;
63	int			type;
64};
65
66extern int generate_xattrs(int, struct xattr_list *);
67
68#ifdef XATTR_SUPPORT
69extern int get_xattrs(int, struct squashfs_super_block *);
70extern int read_xattrs(void *);
71extern long long write_xattrs();
72extern void save_xattrs();
73extern void restore_xattrs();
74extern unsigned int xattr_bytes, total_xattr_bytes;
75extern void write_xattr(char *, unsigned int);
76extern int read_xattrs_from_disk(int, struct squashfs_super_block *);
77extern struct xattr_list *get_xattr(int, unsigned int *, int);
78extern void free_xattr(struct xattr_list *, int);
79#else
80static inline int get_xattrs(int fd, struct squashfs_super_block *sBlk)
81{
82	if(sBlk->xattr_id_table_start != SQUASHFS_INVALID_BLK) {
83		fprintf(stderr, "Xattrs in filesystem! These are not "
84			"supported on this version of Squashfs\n");
85		return 0;
86	} else
87		return SQUASHFS_INVALID_BLK;
88}
89
90
91static inline int read_xattrs(void *dir_ent)
92{
93	return SQUASHFS_INVALID_XATTR;
94}
95
96
97static inline long long write_xattrs()
98{
99	return SQUASHFS_INVALID_BLK;
100}
101
102
103static inline void save_xattrs()
104{
105}
106
107
108static inline void restore_xattrs()
109{
110}
111
112
113static inline void write_xattr(char *pathname, unsigned int xattr)
114{
115}
116
117
118static inline int read_xattrs_from_disk(int fd, struct squashfs_super_block *sBlk)
119{
120	if(sBlk->xattr_id_table_start != SQUASHFS_INVALID_BLK) {
121		fprintf(stderr, "Xattrs in filesystem! These are not "
122			"supported on this version of Squashfs\n");
123		return 0;
124	} else
125		return SQUASHFS_INVALID_BLK;
126}
127
128
129static inline struct xattr_list *get_xattr(int i, unsigned int *count, int j)
130{
131	return NULL;
132}
133#endif
134
135#ifdef XATTR_SUPPORT
136#ifdef XATTR_DEFAULT
137#define NOXOPT_STR
138#define XOPT_STR " (default)"
139#define XATTR_DEF 0
140#else
141#define NOXOPT_STR " (default)"
142#define XOPT_STR
143#define XATTR_DEF 1
144#endif
145#else
146#define NOXOPT_STR " (default)"
147#define XOPT_STR " (unsupported)"
148#define XATTR_DEF 1
149#endif
150#endif
151