[scripts][do-qemux86] add ability to set the network driver

scripts/do-qemux86

@@ -9,7 +9,8 @@ function HELP {
     echo "-m <memory in MB>"
     echo "-s <number of cpus>"
     echo "-d <disk image>     : a virtio block device"
-    echo "-n                  : a virtio network device"
+    echo "-n                  : user mode networking, defaults to virtio-net-pci device"
+    echo "-N <network driver> : specify network driver (virtio-net-pci, e1000e, etc)"
     echo "-g                  : with graphics"
     echo "-k                  : use KVM"
     echo "-h for help"
@@ -24,12 +25,13 @@ DO_KVM=0
 DO_DISK=0
 DISK_IMAGE=""
 DO_NET=0
+NETDEV=e1000e
 MEMSIZE=0
 SMP=1
 SUDO=""
 MAKE_VARS=""
 
-while getopts 6d:gklm:ns:h FLAG; do
+while getopts 6d:gklm:nN:s:h FLAG; do
     case $FLAG in
         6) DO_64BIT=1;;
         d) DO_DISK=1; DISK_IMAGE=$OPTARG;;
@@ -38,10 +40,11 @@ while getopts 6d:gklm:ns:h FLAG; do
         l) DO_LEGACY=1;;
         m) MEMSIZE=$OPTARG;;
         n) DO_NET=1;;
+        N) NETDEV=$OPTARG;;
         s) SMP=$OPTARG;;
         h) HELP;;
         \?)
-            echo unrecognized option
+            echo unrecognized option $OPTARG
             HELP
     esac
 done
@@ -104,7 +107,10 @@ if (( $DO_DISK )); then
 fi
 if (( $DO_NET )); then
     if (( ! $DO_LEGACY )); then
-        ARGS+=" -netdev user,id=vmnic,hostname=qemu -device virtio-net-pci,netdev=vmnic"
+        ARGS+=" -netdev user,id=vmnic,hostname=qemu -device $NETDEV,netdev=vmnic"
+        #ARGS+=" -netdev tap,id=vmnic,ifname=qemu.tap0,script=no,downscript=no"
+        #ARGS+=" -device e1000e,netdev=vmnic"
+        #SUDO="sudo"
     else
         echo "implement legacy + network config"
         exit 1