int ext4_readlink(const char *path, char *buf, size_t bufsize, size_t *rcnt);
+int ext4_setxattr(const char *path, const char *name, size_t name_len,
+ const void *data, size_t data_size, bool replace);
+int ext4_getxattr(const char *path, const char *name, size_t name_len,
+ void *buf, size_t buf_size, size_t *data_size);
+int ext4_listxattr(const char *path, char *list, size_t size, size_t *ret_size);
+int ext4_removexattr(const char *path, const char *name, size_t name_len);
+
+
/*********************************DIRECTORY OPERATION***********************/
/**@brief Recursive directory remove.