]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 */ | |
bd4c625c | 10 | #define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */ |
1da177e4 LT |
11 | |
12 | struct reiserfs_xattr_header { | |
bd4c625c LT |
13 | __le32 h_magic; /* magic number for identification */ |
14 | __le32 h_hash; /* hash of the value */ | |
1da177e4 LT |
15 | }; |
16 | ||
17 | #ifdef __KERNEL__ | |
18 | ||
19 | struct reiserfs_xattr_handler { | |
20 | char *prefix; | |
bd4c625c LT |
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; | |
1da177e4 LT |
31 | }; |
32 | ||
1da177e4 LT |
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) | |
bd4c625c LT |
36 | ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name, |
37 | void *buffer, size_t size); | |
38 | int reiserfs_setxattr(struct dentry *dentry, const char *name, | |
39 | const void *value, size_t size, int flags); | |
40 | ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
41 | int reiserfs_removexattr(struct dentry *dentry, const char *name); | |
42 | int reiserfs_delete_xattrs(struct inode *inode); | |
43 | int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); | |
44 | int reiserfs_xattr_init(struct super_block *sb, int mount_flags); | |
45 | int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd); | |
46 | int reiserfs_permission_locked(struct inode *inode, int mask, | |
47 | struct nameidata *nd); | |
48 | ||
49 | int reiserfs_xattr_del(struct inode *, const char *); | |
50 | int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t); | |
51 | int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); | |
1da177e4 LT |
52 | |
53 | extern struct reiserfs_xattr_handler user_handler; | |
54 | extern struct reiserfs_xattr_handler trusted_handler; | |
55 | #ifdef CONFIG_REISERFS_FS_SECURITY | |
56 | extern struct reiserfs_xattr_handler security_handler; | |
57 | #endif | |
58 | ||
bd4c625c LT |
59 | int reiserfs_xattr_register_handlers(void) __init; |
60 | void reiserfs_xattr_unregister_handlers(void); | |
1da177e4 | 61 | |
bd4c625c | 62 | static inline void reiserfs_write_lock_xattrs(struct super_block *sb) |
1da177e4 | 63 | { |
bd4c625c | 64 | down_write(&REISERFS_XATTR_DIR_SEM(sb)); |
1da177e4 | 65 | } |
bd4c625c | 66 | static inline void reiserfs_write_unlock_xattrs(struct super_block *sb) |
1da177e4 | 67 | { |
bd4c625c | 68 | up_write(&REISERFS_XATTR_DIR_SEM(sb)); |
1da177e4 | 69 | } |
bd4c625c | 70 | static inline void reiserfs_read_lock_xattrs(struct super_block *sb) |
1da177e4 | 71 | { |
bd4c625c | 72 | down_read(&REISERFS_XATTR_DIR_SEM(sb)); |
1da177e4 LT |
73 | } |
74 | ||
bd4c625c | 75 | static inline void reiserfs_read_unlock_xattrs(struct super_block *sb) |
1da177e4 | 76 | { |
bd4c625c | 77 | up_read(&REISERFS_XATTR_DIR_SEM(sb)); |
1da177e4 LT |
78 | } |
79 | ||
bd4c625c | 80 | static inline void reiserfs_write_lock_xattr_i(struct inode *inode) |
1da177e4 | 81 | { |
bd4c625c | 82 | down_write(&REISERFS_I(inode)->xattr_sem); |
1da177e4 | 83 | } |
bd4c625c | 84 | static inline void reiserfs_write_unlock_xattr_i(struct inode *inode) |
1da177e4 | 85 | { |
bd4c625c | 86 | up_write(&REISERFS_I(inode)->xattr_sem); |
1da177e4 | 87 | } |
bd4c625c | 88 | static inline void reiserfs_read_lock_xattr_i(struct inode *inode) |
1da177e4 | 89 | { |
bd4c625c | 90 | down_read(&REISERFS_I(inode)->xattr_sem); |
1da177e4 LT |
91 | } |
92 | ||
bd4c625c | 93 | static inline void reiserfs_read_unlock_xattr_i(struct inode *inode) |
1da177e4 | 94 | { |
bd4c625c | 95 | up_read(&REISERFS_I(inode)->xattr_sem); |
1da177e4 LT |
96 | } |
97 | ||
bd4c625c | 98 | static inline void reiserfs_mark_inode_private(struct inode *inode) |
1da177e4 | 99 | { |
bd4c625c | 100 | inode->i_flags |= S_PRIVATE; |
1da177e4 LT |
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 | ||
bd4c625c LT |
121 | static inline int reiserfs_delete_xattrs(struct inode *inode) |
122 | { | |
123 | return 0; | |
124 | }; | |
125 | static inline int reiserfs_chown_xattrs(struct inode *inode, | |
126 | struct iattr *attrs) | |
127 | { | |
128 | return 0; | |
129 | }; | |
130 | static inline int reiserfs_xattr_init(struct super_block *sb, int mount_flags) | |
1da177e4 | 131 | { |
bd4c625c LT |
132 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL); /* to be sure */ |
133 | return 0; | |
1da177e4 LT |
134 | }; |
135 | #endif | |
136 | ||
bd4c625c | 137 | #endif /* __KERNEL__ */ |