Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | File: linux/reiserfs_xattr.h | |
3 | */ | |
4 | ||
521dae19 AB |
5 | #ifndef _LINUX_REISERFS_XATTR_H |
6 | #define _LINUX_REISERFS_XATTR_H | |
7 | ||
8 | #include <linux/types.h> | |
1da177e4 LT |
9 | |
10 | /* Magic value in header */ | |
bd4c625c | 11 | #define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */ |
1da177e4 LT |
12 | |
13 | struct reiserfs_xattr_header { | |
bd4c625c LT |
14 | __le32 h_magic; /* magic number for identification */ |
15 | __le32 h_hash; /* hash of the value */ | |
1da177e4 LT |
16 | }; |
17 | ||
57fe60df JM |
18 | struct reiserfs_security_handle { |
19 | char *name; | |
20 | void *value; | |
21 | size_t length; | |
22 | }; | |
23 | ||
1da177e4 | 24 | #ifdef __KERNEL__ |
521dae19 | 25 | |
98ca79d5 | 26 | #include <linux/init.h> |
521dae19 AB |
27 | #include <linux/list.h> |
28 | #include <linux/rwsem.h> | |
29 | #include <linux/reiserfs_fs_i.h> | |
30 | #include <linux/reiserfs_fs.h> | |
31 | ||
32 | struct inode; | |
33 | struct dentry; | |
34 | struct iattr; | |
35 | struct super_block; | |
36 | struct nameidata; | |
1da177e4 | 37 | |
a72bdb1c JM |
38 | int reiserfs_xattr_register_handlers(void) __init; |
39 | void reiserfs_xattr_unregister_handlers(void); | |
40 | int reiserfs_xattr_init(struct super_block *sb, int mount_flags); | |
41 | int reiserfs_delete_xattrs(struct inode *inode); | |
42 | int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs); | |
43 | ||
1da177e4 | 44 | #ifdef CONFIG_REISERFS_FS_XATTR |
1da177e4 | 45 | #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir) |
bd4c625c LT |
46 | ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name, |
47 | void *buffer, size_t size); | |
48 | int reiserfs_setxattr(struct dentry *dentry, const char *name, | |
49 | const void *value, size_t size, int flags); | |
50 | ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
51 | int reiserfs_removexattr(struct dentry *dentry, const char *name); | |
e6305c43 | 52 | int reiserfs_permission(struct inode *inode, int mask); |
bd4c625c | 53 | |
48b32a35 | 54 | int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); |
bd4c625c | 55 | int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); |
0ab2621e JM |
56 | int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *, |
57 | struct inode *, const char *, const void *, | |
58 | size_t, int); | |
1da177e4 | 59 | |
48b32a35 JM |
60 | extern struct xattr_handler reiserfs_xattr_user_handler; |
61 | extern struct xattr_handler reiserfs_xattr_trusted_handler; | |
62 | extern struct xattr_handler reiserfs_xattr_security_handler; | |
57fe60df JM |
63 | #ifdef CONFIG_REISERFS_FS_SECURITY |
64 | int reiserfs_security_init(struct inode *dir, struct inode *inode, | |
65 | struct reiserfs_security_handle *sec); | |
66 | int reiserfs_security_write(struct reiserfs_transaction_handle *th, | |
67 | struct inode *inode, | |
68 | struct reiserfs_security_handle *sec); | |
69 | void reiserfs_security_free(struct reiserfs_security_handle *sec); | |
70 | #endif | |
1da177e4 | 71 | |
0ab2621e JM |
72 | #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header)) |
73 | static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size) | |
74 | { | |
75 | loff_t ret = 0; | |
76 | if (reiserfs_file_data_log(inode)) { | |
77 | ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize); | |
78 | ret >>= inode->i_sb->s_blocksize_bits; | |
79 | } | |
80 | return ret; | |
81 | } | |
82 | ||
83 | /* We may have to create up to 3 objects: xattr root, xattr dir, xattr file. | |
84 | * Let's try to be smart about it. | |
85 | * xattr root: We cache it. If it's not cached, we may need to create it. | |
86 | * xattr dir: If anything has been loaded for this inode, we can set a flag | |
87 | * saying so. | |
88 | * xattr file: Since we don't cache xattrs, we can't tell. We always include | |
89 | * blocks for it. | |
90 | * | |
91 | * However, since root and dir can be created between calls - YOU MUST SAVE | |
92 | * THIS VALUE. | |
93 | */ | |
94 | static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode) | |
95 | { | |
96 | size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
97 | ||
98 | if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) { | |
99 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
100 | if (REISERFS_SB(inode->i_sb)->xattr_root == NULL) | |
101 | nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb); | |
102 | } | |
103 | ||
104 | return nblocks; | |
105 | } | |
106 | ||
068fbb31 AD |
107 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) |
108 | { | |
d984561b | 109 | init_rwsem(&REISERFS_I(inode)->i_xattr_sem); |
068fbb31 AD |
110 | } |
111 | ||
1da177e4 LT |
112 | #else |
113 | ||
1da177e4 LT |
114 | #define reiserfs_getxattr NULL |
115 | #define reiserfs_setxattr NULL | |
116 | #define reiserfs_listxattr NULL | |
117 | #define reiserfs_removexattr NULL | |
1da177e4 LT |
118 | |
119 | #define reiserfs_permission NULL | |
120 | ||
068fbb31 AD |
121 | static inline void reiserfs_init_xattr_rwsem(struct inode *inode) |
122 | { | |
123 | } | |
521dae19 AB |
124 | #endif /* CONFIG_REISERFS_FS_XATTR */ |
125 | ||
57fe60df JM |
126 | #ifndef CONFIG_REISERFS_FS_SECURITY |
127 | static inline int reiserfs_security_init(struct inode *dir, | |
128 | struct inode *inode, | |
129 | struct reiserfs_security_handle *sec) | |
130 | { | |
131 | return 0; | |
132 | } | |
133 | static inline int | |
134 | reiserfs_security_write(struct reiserfs_transaction_handle *th, | |
135 | struct inode *inode, | |
136 | struct reiserfs_security_handle *sec) | |
137 | { | |
138 | return 0; | |
139 | } | |
140 | static inline void reiserfs_security_free(struct reiserfs_security_handle *sec) | |
141 | {} | |
142 | #endif | |
143 | ||
521dae19 | 144 | #endif /* __KERNEL__ */ |
1da177e4 | 145 | |
521dae19 | 146 | #endif /* _LINUX_REISERFS_XATTR_H */ |