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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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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 __le32 h_magic; /* magic number for identification */
14 __le32 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,
29 char *out);
30 struct list_head handlers;
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);
46
47int reiserfs_xattr_del(struct inode *, const char *);
48int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
49int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
50
51extern struct reiserfs_xattr_handler user_handler;
52extern struct reiserfs_xattr_handler trusted_handler;
53#ifdef CONFIG_REISERFS_FS_SECURITY
54extern struct reiserfs_xattr_handler security_handler;
55#endif
56
57int reiserfs_xattr_register_handlers(void) __init;
58void reiserfs_xattr_unregister_handlers(void);
59
60static inline void reiserfs_write_lock_xattrs(struct super_block *sb)
61{
62 down_write(&REISERFS_XATTR_DIR_SEM(sb));
63}
64static inline void reiserfs_write_unlock_xattrs(struct super_block *sb)
65{
66 up_write(&REISERFS_XATTR_DIR_SEM(sb));
67}
68static inline void reiserfs_read_lock_xattrs(struct super_block *sb)
69{
70 down_read(&REISERFS_XATTR_DIR_SEM(sb));
71}
72
73static inline void reiserfs_read_unlock_xattrs(struct super_block *sb)
74{
75 up_read(&REISERFS_XATTR_DIR_SEM(sb));
76}
77
78static inline void reiserfs_write_lock_xattr_i(struct inode *inode)
79{
80 down_write(&REISERFS_I(inode)->xattr_sem);
81}
82static inline void reiserfs_write_unlock_xattr_i(struct inode *inode)
83{
84 up_write(&REISERFS_I(inode)->xattr_sem);
85}
86static inline void reiserfs_read_lock_xattr_i(struct inode *inode)
87{
88 down_read(&REISERFS_I(inode)->xattr_sem);
89}
90
91static inline void reiserfs_read_unlock_xattr_i(struct inode *inode)
92{
93 up_read(&REISERFS_I(inode)->xattr_sem);
94}
95
96static inline void reiserfs_mark_inode_private(struct inode *inode)
97{
98 inode->i_flags |= S_PRIVATE;
99}
100
101#else
102
103#define is_reiserfs_priv_object(inode) 0
104#define reiserfs_mark_inode_private(inode) do {;} while(0)
105#define reiserfs_getxattr NULL
106#define reiserfs_setxattr NULL
107#define reiserfs_listxattr NULL
108#define reiserfs_removexattr NULL
109#define reiserfs_write_lock_xattrs(sb) do {;} while(0)
110#define reiserfs_write_unlock_xattrs(sb) do {;} while(0)
111#define reiserfs_read_lock_xattrs(sb)
112#define reiserfs_read_unlock_xattrs(sb)
113
114#define reiserfs_permission NULL
115
116#define reiserfs_xattr_register_handlers() 0
117#define reiserfs_xattr_unregister_handlers()
118
119static inline int reiserfs_delete_xattrs(struct inode *inode)
120{
121 return 0;
122};
123static inline int reiserfs_chown_xattrs(struct inode *inode,
124 struct iattr *attrs)
125{
126 return 0;
127};
128static inline int reiserfs_xattr_init(struct super_block *sb, int mount_flags)
129{
130 sb->s_flags = (sb->s_flags & ~MS_POSIXACL); /* to be sure */
131 return 0;
132};
133#endif
134
135#endif /* __KERNEL__ */