Purpose: To reduce the duplicated code. And one minor fix: add an empty line between two functions Signed-off-by: Ziye Yang <ziye.yang@intel.com> Change-Id: I12c9ddba6526c094cd2bd945e14f9d8bf5209adf Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/464504 Reviewed-by: Changpeng Liu <changpeng.liu@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>