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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 __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);
46int reiserfs_permission_locked(struct inode *inode, int mask,
47 struct nameidata *nd);
48
49int reiserfs_xattr_del(struct inode *, const char *);
50int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
51int reiserfs_xattr_set(struct inode *, const char *, const void *, 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 reiserfs_write_lock_xattrs(struct super_block *sb)
63{
64 down_write(&REISERFS_XATTR_DIR_SEM(sb));
65}
66static inline void reiserfs_write_unlock_xattrs(struct super_block *sb)
67{
68 up_write(&REISERFS_XATTR_DIR_SEM(sb));
69}
70static inline void reiserfs_read_lock_xattrs(struct super_block *sb)
71{
72 down_read(&REISERFS_XATTR_DIR_SEM(sb));
73}
74
75static inline void reiserfs_read_unlock_xattrs(struct super_block *sb)
76{
77 up_read(&REISERFS_XATTR_DIR_SEM(sb));
78}
79
80static inline void reiserfs_write_lock_xattr_i(struct inode *inode)
81{
82 down_write(&REISERFS_I(inode)->xattr_sem);
83}
84static inline void reiserfs_write_unlock_xattr_i(struct inode *inode)
85{
86 up_write(&REISERFS_I(inode)->xattr_sem);
87}
88static inline void reiserfs_read_lock_xattr_i(struct inode *inode)
89{
90 down_read(&REISERFS_I(inode)->xattr_sem);
91}
92
93static inline void reiserfs_read_unlock_xattr_i(struct inode *inode)
94{
95 up_read(&REISERFS_I(inode)->xattr_sem);
96}
97
98static inline void reiserfs_mark_inode_private(struct inode *inode)
99{
100 inode->i_flags |= S_PRIVATE;
101}
102
103#else
104
105#define is_reiserfs_priv_object(inode) 0
106#define reiserfs_mark_inode_private(inode)
107#define reiserfs_getxattr NULL
108#define reiserfs_setxattr NULL
109#define reiserfs_listxattr NULL
110#define reiserfs_removexattr NULL
111#define reiserfs_write_lock_xattrs(sb)
112#define reiserfs_write_unlock_xattrs(sb)
113#define reiserfs_read_lock_xattrs(sb)
114#define reiserfs_read_unlock_xattrs(sb)
115
116#define reiserfs_permission NULL
117
118#define reiserfs_xattr_register_handlers() 0
119#define reiserfs_xattr_unregister_handlers()
120
121static inline int reiserfs_delete_xattrs(struct inode *inode)
122{
123 return 0;
124};
125static inline int reiserfs_chown_xattrs(struct inode *inode,
126 struct iattr *attrs)
127{
128 return 0;
129};
130static inline int reiserfs_xattr_init(struct super_block *sb, int mount_flags)
131{
132 sb->s_flags = (sb->s_flags & ~MS_POSIXACL); /* to be sure */
133 return 0;
134};
135#endif
136
137#endif /* __KERNEL__ */