From 875fe9627fcb705bc66cb3b0b31c7ef6111ab1f5 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 25 Mar 2020 11:06:52 +0200
Subject: Add ability to specify alternative nic in test-machine

---
 test-machine | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/test-machine b/test-machine
index 56c08e2..933a52e 100755
--- a/test-machine
+++ b/test-machine
@@ -2,7 +2,11 @@
 
 # Test a virtual machine with KVM.
 #
-usage="usage: $0 <machine-dir> [<qemu-option>...]"
+# -n <nic>
+#   Network adapter to use, for example, virtio-net-pci (default), e1000,
+#   or vmxnet3.
+#
+usage="usage: $0 [-n <nic>] <machine-dir> [<qemu-option>...]"
 
 owd="$(pwd)"
 trap "{ cd '$owd'; exit 1; }" ERR
@@ -11,6 +15,22 @@ set -o errtrace # Trap in functions.
 function info () { echo "$*" 1>&2; }
 function error () { info "$*"; exit 1; }
 
+nic=virtio-net-pci
+
+while [ "$#" -gt 0 ]; do
+  case "$1" in
+    -n)
+      shift
+      nic="$1"
+      shift
+      ;;
+    *)
+      break
+      ;;
+  esac
+done
+
+
 dir="${1%/}"
 shift
 
@@ -35,7 +55,7 @@ sudo ip link set "$tap" master "$br"
   -cpu host -smp "8,sockets=1,cores=4,threads=2" \
   \
   -netdev "tap,id=net0,ifname=$tap,script=no" \
-  -device "virtio-net-pci,netdev=net0,mac=$mac" \
+  -device "$nic,netdev=net0,mac=$mac" \
   \
   -drive  "if=none,id=disk0,file=$dir/disk.img,format=raw" \
   -device "virtio-blk-pci,scsi=off,drive=disk0" \
@@ -71,7 +91,7 @@ exit 0
 sudo "${kvm[@]}" \
   -m 8G \
   -cpu host -smp "sockets=1,cores=4,threads=2" \
-  -device "virtio-net-pci,netdev=net0,mac=$mac" \
+  -device "$nic,netdev=net0,mac=$mac" \
   -netdev "tap,id=net0,script=./qemu-ifup" \
   -device "virtio-scsi-pci,id=scsi" \
   -device "scsi-hd,drive=disk1" \
-- 
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