1 #include <linux/reiserfs_xattr.h>
2 #include <linux/init.h>
3 #include <linux/list.h>
4 #include <linux/rwsem.h>
5
6 struct inode;
7 struct dentry;
8 struct iattr;
9 struct super_block;
10 struct nameidata;
11
12 int reiserfs_xattr_register_handlers(void) __init;
13 void reiserfs_xattr_unregister_handlers(void);
14 int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
15 int reiserfs_lookup_privroot(struct super_block *sb);
16 int reiserfs_delete_xattrs(struct inode *inode);
17 int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
18 int reiserfs_permission(struct inode *inode, int mask);
19
20 #ifdef CONFIG_REISERFS_FS_XATTR
21 #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
22 ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
23 void *buffer, size_t size);
24 int reiserfs_setxattr(struct dentry *dentry, const char *name,
25 const void *value, size_t size, int flags);
26 ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
27 int reiserfs_removexattr(struct dentry *dentry, const char *name);
28
29 int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
30 int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
31 int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
32 struct inode *, const char *, const void *,
33 size_t, int);
34
35 extern const struct xattr_handler reiserfs_xattr_user_handler;
36 extern const struct xattr_handler reiserfs_xattr_trusted_handler;
37 extern const struct xattr_handler reiserfs_xattr_security_handler;
38 #ifdef CONFIG_REISERFS_FS_SECURITY
39 int reiserfs_security_init(struct inode *dir, struct inode *inode,
40 const struct qstr *qstr,
41 struct reiserfs_security_handle *sec);
42 int reiserfs_security_write(struct reiserfs_transaction_handle *th,
43 struct inode *inode,
44 struct reiserfs_security_handle *sec);
45 void reiserfs_security_free(struct reiserfs_security_handle *sec);
46 #endif
47
reiserfs_xattrs_initialized(struct super_block * sb)48 static inline int reiserfs_xattrs_initialized(struct super_block *sb)
49 {
50 return REISERFS_SB(sb)->priv_root != NULL;
51 }
52
53 #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
reiserfs_xattr_nblocks(struct inode * inode,loff_t size)54 static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
55 {
56 loff_t ret = 0;
57 if (reiserfs_file_data_log(inode)) {
58 ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
59 ret >>= inode->i_sb->s_blocksize_bits;
60 }
61 return ret;
62 }
63
64 /* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
65 * Let's try to be smart about it.
66 * xattr root: We cache it. If it's not cached, we may need to create it.
67 * xattr dir: If anything has been loaded for this inode, we can set a flag
68 * saying so.
69 * xattr file: Since we don't cache xattrs, we can't tell. We always include
70 * blocks for it.
71 *
72 * However, since root and dir can be created between calls - YOU MUST SAVE
73 * THIS VALUE.
74 */
reiserfs_xattr_jcreate_nblocks(struct inode * inode)75 static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
76 {
77 size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
78
79 if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
80 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
81 if (!REISERFS_SB(inode->i_sb)->xattr_root->d_inode)
82 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
83 }
84
85 return nblocks;
86 }
87
reiserfs_init_xattr_rwsem(struct inode * inode)88 static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
89 {
90 init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
91 }
92
93 #else
94
95 #define reiserfs_getxattr NULL
96 #define reiserfs_setxattr NULL
97 #define reiserfs_listxattr NULL
98 #define reiserfs_removexattr NULL
99
reiserfs_init_xattr_rwsem(struct inode * inode)100 static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
101 {
102 }
103 #endif /* CONFIG_REISERFS_FS_XATTR */
104
105 #ifndef CONFIG_REISERFS_FS_SECURITY
reiserfs_security_init(struct inode * dir,struct inode * inode,const struct qstr * qstr,struct reiserfs_security_handle * sec)106 static inline int reiserfs_security_init(struct inode *dir,
107 struct inode *inode,
108 const struct qstr *qstr,
109 struct reiserfs_security_handle *sec)
110 {
111 return 0;
112 }
113 static inline int
reiserfs_security_write(struct reiserfs_transaction_handle * th,struct inode * inode,struct reiserfs_security_handle * sec)114 reiserfs_security_write(struct reiserfs_transaction_handle *th,
115 struct inode *inode,
116 struct reiserfs_security_handle *sec)
117 {
118 return 0;
119 }
reiserfs_security_free(struct reiserfs_security_handle * sec)120 static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
121 {}
122 #endif
123