iscsit_add_r2t_to_list
if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) {
ret = iscsit_add_r2t_to_list(cmd, offset, xfer_len, 1, 0);
if (iscsit_add_r2t_to_list(cmd, offset, length, 0, 0) < 0) {
extern int iscsit_add_r2t_to_list(struct iscsit_cmd *, u32, u32, int, u32);