2 File: linux/reiserfs_xattr.h
5 #ifndef _LINUX_REISERFS_XATTR_H
6 #define _LINUX_REISERFS_XATTR_H
8 #include <linux/types.h>
10 /* Magic value in header */
11 #define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */
13 struct reiserfs_xattr_header {
14 __le32 h_magic; /* magic number for identification */
15 __le32 h_hash; /* hash of the value */
20 #include <linux/init.h>
21 #include <linux/list.h>
22 #include <linux/rwsem.h>
23 #include <linux/reiserfs_fs_i.h>
24 #include <linux/reiserfs_fs.h>
32 int reiserfs_xattr_register_handlers(void) __init;
33 void reiserfs_xattr_unregister_handlers(void);
34 int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
35 int reiserfs_delete_xattrs(struct inode *inode);
36 int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
38 #ifdef CONFIG_REISERFS_FS_XATTR
39 #define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
40 ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
41 void *buffer, size_t size);
42 int reiserfs_setxattr(struct dentry *dentry, const char *name,
43 const void *value, size_t size, int flags);
44 ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
45 int reiserfs_removexattr(struct dentry *dentry, const char *name);
46 int reiserfs_permission(struct inode *inode, int mask);
48 int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
49 int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
50 int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
51 struct inode *, const char *, const void *,
54 extern struct xattr_handler reiserfs_xattr_user_handler;
55 extern struct xattr_handler reiserfs_xattr_trusted_handler;
56 extern struct xattr_handler reiserfs_xattr_security_handler;
58 #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
59 static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
62 if (reiserfs_file_data_log(inode)) {
63 ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
64 ret >>= inode->i_sb->s_blocksize_bits;
69 /* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
70 * Let's try to be smart about it.
71 * xattr root: We cache it. If it's not cached, we may need to create it.
72 * xattr dir: If anything has been loaded for this inode, we can set a flag
74 * xattr file: Since we don't cache xattrs, we can't tell. We always include
77 * However, since root and dir can be created between calls - YOU MUST SAVE
80 static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
82 size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
84 if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
85 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
86 if (REISERFS_SB(inode->i_sb)->xattr_root == NULL)
87 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
93 static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
95 init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
100 #define reiserfs_getxattr NULL
101 #define reiserfs_setxattr NULL
102 #define reiserfs_listxattr NULL
103 #define reiserfs_removexattr NULL
105 #define reiserfs_permission NULL
107 static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
110 #endif /* CONFIG_REISERFS_FS_XATTR */
112 #endif /* __KERNEL__ */
114 #endif /* _LINUX_REISERFS_XATTR_H */