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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 File: linux/reiserfs_xattr.h
3*/
4
5#include <linux/config.h>
6#include <linux/init.h>
7#include <linux/xattr.h>
8
9/* Magic value in header */
10#define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */
11
12struct reiserfs_xattr_header {
13 __u32 h_magic; /* magic number for identification */
14 __u32 h_hash; /* hash of the value */
15};
16
17#ifdef __KERNEL__
18
19struct reiserfs_xattr_handler {
20 char *prefix;
21 int (*init)(void);
22 void (*exit)(void);
23 int (*get)(struct inode *inode, const char *name, void *buffer,
24 size_t size);
25 int (*set)(struct inode *inode, const char *name, const void *buffer,
26 size_t size, int flags);
27 int (*del)(struct inode *inode, const char *name);
28 int (*list)(struct inode *inode, const char *name, int namelen, char *out);
29 struct list_head handlers;
30};
31
32
33#ifdef CONFIG_REISERFS_FS_XATTR
34#define is_reiserfs_priv_object(inode) IS_PRIVATE(inode)
35#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
36ssize_t reiserfs_getxattr (struct dentry *dentry, const char *name,
37 void *buffer, size_t size);
38int reiserfs_setxattr (struct dentry *dentry, const char *name,
39 const void *value, size_t size, int flags);
40ssize_t reiserfs_listxattr (struct dentry *dentry, char *buffer, size_t size);
41int reiserfs_removexattr (struct dentry *dentry, const char *name);
42int reiserfs_delete_xattrs (struct inode *inode);
43int reiserfs_chown_xattrs (struct inode *inode, struct iattr *attrs);
44int reiserfs_xattr_init (struct super_block *sb, int mount_flags);
45int reiserfs_permission (struct inode *inode, int mask, struct nameidata *nd);
46int reiserfs_permission_locked (struct inode *inode, int mask, struct nameidata *nd);
47
48int reiserfs_xattr_del (struct inode *, const char *);
49int reiserfs_xattr_get (const struct inode *, const char *, void *, size_t);
50int reiserfs_xattr_set (struct inode *, const char *, const void *,
51 size_t, int);
52
53extern struct reiserfs_xattr_handler user_handler;
54extern struct reiserfs_xattr_handler trusted_handler;
55#ifdef CONFIG_REISERFS_FS_SECURITY
56extern struct reiserfs_xattr_handler security_handler;
57#endif
58
59int reiserfs_xattr_register_handlers (void) __init;
60void reiserfs_xattr_unregister_handlers (void);
61
62static inline void
63reiserfs_write_lock_xattrs(struct super_block *sb)
64{
65 down_write (&REISERFS_XATTR_DIR_SEM(sb));
66}
67static inline void
68reiserfs_write_unlock_xattrs(struct super_block *sb)
69{
70 up_write (&REISERFS_XATTR_DIR_SEM(sb));
71}
72static inline void
73reiserfs_read_lock_xattrs(struct super_block *sb)
74{
75 down_read (&REISERFS_XATTR_DIR_SEM(sb));
76}
77
78static inline void
79reiserfs_read_unlock_xattrs(struct super_block *sb)
80{
81 up_read (&REISERFS_XATTR_DIR_SEM(sb));
82}
83
84static inline void
85reiserfs_write_lock_xattr_i(struct inode *inode)
86{
87 down_write (&REISERFS_I(inode)->xattr_sem);
88}
89static inline void
90reiserfs_write_unlock_xattr_i(struct inode *inode)
91{
92 up_write (&REISERFS_I(inode)->xattr_sem);
93}
94static inline void
95reiserfs_read_lock_xattr_i(struct inode *inode)
96{
97 down_read (&REISERFS_I(inode)->xattr_sem);
98}
99
100static inline void
101reiserfs_read_unlock_xattr_i(struct inode *inode)
102{
103 up_read (&REISERFS_I(inode)->xattr_sem);
104}
105
106static inline void
107reiserfs_mark_inode_private(struct inode *inode)
108{
109 inode->i_flags |= S_PRIVATE;
110}
111
112#else
113
114#define is_reiserfs_priv_object(inode) 0
115#define reiserfs_mark_inode_private(inode)
116#define reiserfs_getxattr NULL
117#define reiserfs_setxattr NULL
118#define reiserfs_listxattr NULL
119#define reiserfs_removexattr NULL
120#define reiserfs_write_lock_xattrs(sb)
121#define reiserfs_write_unlock_xattrs(sb)
122#define reiserfs_read_lock_xattrs(sb)
123#define reiserfs_read_unlock_xattrs(sb)
124
125#define reiserfs_permission NULL
126
127#define reiserfs_xattr_register_handlers() 0
128#define reiserfs_xattr_unregister_handlers()
129
130static inline int reiserfs_delete_xattrs (struct inode *inode) { return 0; };
131static inline int reiserfs_chown_xattrs (struct inode *inode, struct iattr *attrs) { return 0; };
132static inline int reiserfs_xattr_init (struct super_block *sb, int mount_flags)
133{
134 sb->s_flags = (sb->s_flags & ~MS_POSIXACL); /* to be sure */
135 return 0;
136};
137#endif
138
139#endif /* __KERNEL__ */