Support for SMB Direct protocol

configname: CONFIG_SMB_SERVER_SMBDIRECT

Linux Kernel Configuration
└─>File systems
└─>Network File Systems
└─>Support for SMB Direct protocol
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Enables SMB Direct support for SMB 3.0, 3.02 and 3.1.1.

SMB Direct allows transferring SMB packets over RDMA. If unsure,
say N.