#!/bin/bash
# Written by James Harvey <jamespharvey20@gmail.com>
# Released under GPL2 license
#
# Load kernel module for NFS server using RDMA, and configure RDMA port
#
# This is usually run automatically by systemd, after rdma.service starts
#

CONFIG=/etc/nfs-utils-rdma-server.conf

if [[ $EUID -ne 0 ]]; then
   echo "nfs-utils-rdma-server must be run as root" 1>&2
   exit 1
fi

if ! [ -f $CONFIG ]; then
   echo "$CONFIG not found"
   exit 2
fi

. $CONFIG

if ! [ -n "${NFS_UTILS_RDMA_SERVER_PORT}" ]; then
   echo "You need to fix $CONFIG"
   echo "NFS_UTILS_RDMA_SERVER_PORT is not set"
   exit 1
fi

numerical_regex='^[0-9]+$'
if ! [[ ${NFS_UTILS_RDMA_SERVER_PORT} =~ $numerical_regex ]]; then
   echo "You need to fix $CONFIG"
   echo "NFS_UTILS_RDMA_SERVER_PORT=${NFS_UTILS_RDMA_SERVER_PORT} - Acceptable values are only integers"
   exit 2
fi 

modprobe svcrdma
echo "Attempted loading kernel module svcrdma."

echo "rdma ${NFS_UTILS_RDMA_SERVER_PORT}" > /proc/fs/nfsd/portlist
echo "Attempted setting rdma port to ${NFS_UTILS_RDMA_SERVER_PORT}."

unset NFS_UTILS_RDMA_SERVER_PORT

exit 0