summaryrefslogblamecommitdiff
path: root/include/linux/reiserfs_xattr.h
blob: 9244c574882005f52528fc221f661a7c43916857 (plain) (tree) 
1da177e4c3f4












3e8962be915b ^


1da177e4c3f4





























































































































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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139












                                                    

                                                                      




























































































































                                                                                                 
/*
  File: linux/reiserfs_xattr.h
*/

#include <linux/config.h>
#include <linux/init.h>
#include <linux/xattr.h>

/* Magic value in header */
#define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */

struct reiserfs_xattr_header {
    __le32 h_magic;              /* magic number for identification */
    __le32 h_hash;               /* hash of the value */
};

#ifdef __KERNEL__

struct reiserfs_xattr_handler {
	char *prefix;
        int (*init)(void);
        void (*exit)(void);
	int (*get)(struct inode *inode, const char *name, void *buffer,
		   size_t size);
	int (*set)(struct inode *inode, const char *name, const void *buffer,
		   size_t size, int flags);
	int (*del)(struct inode *inode, const char *name);
        int (*list)(struct inode *inode, const char *name, int namelen, char *out);
        struct list_head handlers;
};


#ifdef CONFIG_REISERFS_FS_XATTR
#define is_reiserfs_priv_object(inode) IS_PRIVATE(inode)
#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
ssize_t reiserfs_getxattr (struct dentry *dentry, const char *name,
			   void *buffer, size_t size);
int reiserfs_setxattr (struct dentry *dentry, const char *name,
                       const void *value, size_t size, int flags);
ssize_t reiserfs_listxattr (struct dentry *dentry, char *buffer, size_t size);
int reiserfs_removexattr (struct dentry *dentry, const char *name);
int reiserfs_delete_xattrs (struct inode *inode);
int reiserfs_chown_xattrs (struct inode *inode, struct iattr *attrs);
int reiserfs_xattr_init (struct super_block *sb, int mount_flags);
int reiserfs_permission (struct inode *inode, int mask, struct nameidata *nd);
int reiserfs_permission_locked (struct inode *inode, int mask, struct nameidata *nd);

int reiserfs_xattr_del (struct inode *, const char *);
int reiserfs_xattr_get (const struct inode *, const char *, void *, size_t);
int reiserfs_xattr_set (struct inode *, const char *, const void *,
                               size_t, int);

extern struct reiserfs_xattr_handler user_handler;
extern struct reiserfs_xattr_handler trusted_handler;
#ifdef CONFIG_REISERFS_FS_SECURITY
extern struct reiserfs_xattr_handler security_handler;
#endif

int reiserfs_xattr_register_handlers (void) __init;
void reiserfs_xattr_unregister_handlers (void);

static inline void
reiserfs_write_lock_xattrs(struct super_block *sb)
{
    down_write (&REISERFS_XATTR_DIR_SEM(sb));
}
static inline void
reiserfs_write_unlock_xattrs(struct super_block *sb)
{
    up_write (&REISERFS_XATTR_DIR_SEM(sb));
}
static inline void
reiserfs_read_lock_xattrs(struct super_block *sb)
{
    down_read (&REISERFS_XATTR_DIR_SEM(sb));
}

static inline void
reiserfs_read_unlock_xattrs(struct super_block *sb)
{
    up_read (&REISERFS_XATTR_DIR_SEM(sb));
}

static inline void
reiserfs_write_lock_xattr_i(struct inode *inode)
{
    down_write (&REISERFS_I(inode)->xattr_sem);
}
static inline void
reiserfs_write_unlock_xattr_i(struct inode *inode)
{
    up_write (&REISERFS_I(inode)->xattr_sem);
}
static inline void
reiserfs_read_lock_xattr_i(struct inode *inode)
{
    down_read (&REISERFS_I(inode)->xattr_sem);
}

static inline void
reiserfs_read_unlock_xattr_i(struct inode *inode)
{
    up_read (&REISERFS_I(inode)->xattr_sem);
}

static inline void
reiserfs_mark_inode_private(struct inode *inode)
{
    inode->i_flags |= S_PRIVATE;
}

#else

#define is_reiserfs_priv_object(inode) 0
#define reiserfs_mark_inode_private(inode)
#define reiserfs_getxattr NULL
#define reiserfs_setxattr NULL
#define reiserfs_listxattr NULL
#define reiserfs_removexattr NULL
#define reiserfs_write_lock_xattrs(sb)
#define reiserfs_write_unlock_xattrs(sb)
#define reiserfs_read_lock_xattrs(sb)
#define reiserfs_read_unlock_xattrs(sb)

#define reiserfs_permission NULL

#define reiserfs_xattr_register_handlers() 0
#define reiserfs_xattr_unregister_handlers()

static inline int reiserfs_delete_xattrs (struct inode *inode) { return 0; };
static inline int reiserfs_chown_xattrs (struct inode *inode, struct iattr *attrs) { return 0; };
static inline int reiserfs_xattr_init (struct super_block *sb, int mount_flags)
{
    sb->s_flags = (sb->s_flags & ~MS_POSIXACL); /* to be sure */
    return 0;
};
#endif

#endif  /* __KERNEL__ */