From 7b68047e2217b13d2c0acec4674fa7d1720cfae9 Mon Sep 17 00:00:00 2001
From: Yuan Bai <bybai@cn.ibm.com>
Date: Thu, 18 Oct 2018 14:58:36 +0800
Subject: [PATCH] fix enablekdump for redhat7.6 and 7.6-alt nfs vers 4 support
 (#5713)

* fix redhat7.6 nfs vers 4 support

* enhance

* polished
---
 xCAT/postscripts/enablekdump | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/xCAT/postscripts/enablekdump b/xCAT/postscripts/enablekdump
index c8e780d8e..295447b77 100755
--- a/xCAT/postscripts/enablekdump
+++ b/xCAT/postscripts/enablekdump
@@ -216,8 +216,27 @@ EOF
             fi
 	else
             if (pmatch $OSVER "rhel7*") || (pmatch $OSVER "rhels7*");then
-               /bin/mount -o vers=3 $KDIP:$KDPATH $MOUNTPATH
-               #/bin/mount -o nolock $KDIP:$KDPATH $MOUNTPATH
+               nfsvers=$(/usr/sbin/rpcinfo -p $KDIP|grep -w nfs|awk /tcp/'{print $2}'|sort)
+               nfsver=0
+               if [ -n "$nfsvers" ]; then
+                   for i in $nfsvers
+                   do
+                       if [ $i -eq 3 ] && ! [ grep -w nfs /proc/filesystems >/dev/null 2>&1 ]; then
+                           nfsver=3
+                           break
+                       elif [ $i -eq 4 ] && ! [ grep -w nfs4 /proc/filesystems >/dev/null 2>&1 ]; then
+                           nfsver=4
+                           break
+                       fi
+                   done
+                   if [ $nfsver -ne 0 ]; then
+                       /bin/mount -o vers=$nfsver $KDIP:$KDPATH $MOUNTPATH
+                   else
+                       /bin/mount -o nolock $KDIP:$KDPATH $MOUNTPATH
+                   fi
+               else
+                   /bin/echo "nfs server is not available"
+               fi
                [ -d $MOUNTPATH/var/crash ] || mkdir -p $MOUNTPATH/var/crash
 
                #The initramfs used in kdump does not need "root", however, the initramfs refused to continue