#!/bin/bash
#Brindge connection for Host-only-networking for Windows10 VM


if [[ -e /sys/class/net/br0 ]] && [[ -e /sys/class/net/tap0 ]]; then
   echo "br0 and tap0, both exists , so continuing with qemu"
else 
   #create a bridge on the host machine:
   ip link add br0 type bridge
   #If you want to use already created bridge don't forget to clean out IP.
   ip addr flush dev br0
   #Assign IP to the bridge.
   ip addr add 192.168.100.50/24 brd 192.168.100.255 dev br0
   #Create TAP interface.
   ip tuntap add mode tap user $"(whoami)"
   #Add TAP interface to the bridge.
   ip link set tap0 master br0
   #Make sure everything is up:
   ip link set dev br0 up
   ip link set dev tap0 up
   #Assign IP range to the bridge.
   dnsmasq --interface=br0 --bind-interfaces \
    	   --dhcp-range=192.168.100.50,192.168.100.254
fi
#---------------------------------------------------------------------------------------------------------------------------------
#Obtiain value of hugepages 
hugepages=$( cat /proc/sys/vm/nr_hugepages )

printf '%d ' "${hugepages[@]}"
if [ $"(hugepages)" = "1024" ]; then
   echo "hugepages value already set"
else
   #Assign hugepages value
   sysctl -w vm.nr_hugepages=1024
   echo "hugepages value assigned as 1024"
fi

#----------------------------------------------------------------------------------------------------------------------------------

#Shell script for qemu-kvm emulation of Windows10 OS installed on my HDD
#remote-viewer spice://127.0.0.1:5959
#spicy -h 127.0.0.1 -p 5959

exec qemu-system-x86_64 --enable-kvm -daemonize -name "Windows 10"\
	-cpu host -m 2G -smp 2 -mem-path /dev/hugepages \
	-vga qxl -soundhw hda \
	-device virtio-net-pci,netdev=winnet0,mac=52:54:00:32:45:12 \
        -netdev tap,id=winnet0,ifname=tap0,script=no,downscript=no \
	-device qemu-xhci,id=xhci -usb -device usb-tablet \
	-drive file=/usr/share/ovmf/x64/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on \
	-drive file=/home/chen/vm/Win10Part/qemu-windows.nvram,if=pflash,format=raw,unit=1 \
	-drive file=/dev/sda,index=0,media=disk,driver=raw \
	-spice port=5959,disable-ticketing -device virtio-serial-pci \
	-device virtserialport,chardev=Win10channel0,name=com.redhat.spice.0 \
	-chardev spicevmc,id=Win10channel0,name=vdagent \
	"$@"