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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/xattr.h>
6
7/* Magic value in header */
8#define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */
9
10struct reiserfs_xattr_header {
11 __le32 h_magic; /* magic number for identification */
12 __le32 h_hash; /* hash of the value */
13};
14
15#ifdef __KERNEL__
16#include <linux/init.h>
17
18struct reiserfs_xattr_handler {
19 char *prefix;
20 int (*init) (void);
21 void (*exit) (void);
22 int (*get) (struct inode * inode, const char *name, void *buffer,
23 size_t size);
24 int (*set) (struct inode * inode, const char *name, const void *buffer,
25 size_t size, int flags);
26 int (*del) (struct inode * inode, const char *name);
27 int (*list) (struct inode * inode, const char *name, int namelen,
28 char *out);
29 struct list_head handlers;
30};
31
32#ifdef CONFIG_REISERFS_FS_XATTR
33#define is_reiserfs_priv_object(inode) IS_PRIVATE(inode)
34#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
35ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
36 void *buffer, size_t size);
37int reiserfs_setxattr(struct dentry *dentry, const char *name,
38 const void *value, size_t size, int flags);
39ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
40int reiserfs_removexattr(struct dentry *dentry, const char *name);
41int reiserfs_delete_xattrs(struct inode *inode);
42int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
43int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
44int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd);
45
46int reiserfs_xattr_del(struct inode *, const char *);
47int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
48int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
49
50extern struct reiserfs_xattr_handler user_handler;
51extern struct reiserfs_xattr_handler trusted_handler;
52#ifdef CONFIG_REISERFS_FS_SECURITY
53extern struct reiserfs_xattr_handler security_handler;
54#endif
55
56int reiserfs_xattr_register_handlers(void) __init;
57void reiserfs_xattr_unregister_handlers(void);
58
59static inline void reiserfs_write_lock_xattrs(struct super_block *sb)
60{
61 down_write(&REISERFS_XATTR_DIR_SEM(sb));
62}
63static inline void reiserfs_write_unlock_xattrs(struct super_block *sb)
64{
65 up_write(&REISERFS_XATTR_DIR_SEM(sb));
66}
67static inline void reiserfs_read_lock_xattrs(struct super_block *sb)
68{
69 down_read(&REISERFS_XATTR_DIR_SEM(sb));
70}
71
72static inline void reiserfs_read_unlock_xattrs(struct super_block *sb)
73{
74 up_read(&REISERFS_XATTR_DIR_SEM(sb));
75}
76
77static inline void reiserfs_write_lock_xattr_i(struct inode *inode)
78{
79 down_write(&REISERFS_I(inode)->xattr_sem);
80}
81static inline void reiserfs_write_unlock_xattr_i(struct inode *inode)
82{
83 up_write(&REISERFS_I(inode)->xattr_sem);
84}
85static inline void reiserfs_read_lock_xattr_i(struct inode *inode)
86{
87 down_read(&REISERFS_I(inode)->xattr_sem);
88}
89
90static inline void reiserfs_read_unlock_xattr_i(struct inode *inode)
91{
92 up_read(&REISERFS_I(inode)->xattr_sem);
93}
94
95static inline void reiserfs_mark_inode_private(struct inode *inode)
96{
97 inode->i_flags |= S_PRIVATE;
98}
99
100static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
101{
102 init_rwsem(&REISERFS_I(inode)->xattr_sem);
103}
104
105#else
106
107#define is_reiserfs_priv_object(inode) 0
108#define reiserfs_mark_inode_private(inode) do {;} while(0)
109#define reiserfs_getxattr NULL
110#define reiserfs_setxattr NULL
111#define reiserfs_listxattr NULL
112#define reiserfs_removexattr NULL
113#define reiserfs_write_lock_xattrs(sb) do {;} while(0)
114#define reiserfs_write_unlock_xattrs(sb) do {;} while(0)
115#define reiserfs_read_lock_xattrs(sb)
116#define reiserfs_read_unlock_xattrs(sb)
117
118#define reiserfs_permission NULL
119
120#define reiserfs_xattr_register_handlers() 0
121#define reiserfs_xattr_unregister_handlers()
122
123static inline int reiserfs_delete_xattrs(struct inode *inode)
124{
125 return 0;
126};
127static inline int reiserfs_chown_xattrs(struct inode *inode,
128 struct iattr *attrs)
129{
130 return 0;
131};
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};
137static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
138{
139}
140#endif
141
142#endif /* __KERNEL__ */