void mdc_open_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
__u32 mode, __u64 rdev, __u32 flags, const void *data,
int datalen);
-void mdc_join_pack(struct ptlrpc_request *req, struct md_op_data *op_data,
- __u64 head_size);
void mdc_unlink_pack(struct ptlrpc_request *req, struct md_op_data *op_data);
void mdc_link_pack(struct ptlrpc_request *req, struct md_op_data *op_data);
void mdc_rename_pack(struct ptlrpc_request *req, struct md_op_data *op_data,