extern int ext3_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
extern int ext3_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);