From ec7f612a56ed8d3a2e83101b5cffcea3058fd30a Mon Sep 17 00:00:00 2001
From: Michal Privoznik <mprivozn@redhat.com>
Date: Mon, 26 Sep 2016 09:54:26 +0200
Subject: [PATCH] qemuBuildInterfaceCommandLine: Move hostdev handling a bit
 further

The idea is to have function that does some checking of the
arguments at its beginning and then have one big switch for all
the interface types it supports. Each one of them generating the
corresponding part of the command line.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
---
 src/qemu/qemu_command.c                       | 13 +++----
 .../qemuxml2argv-net-hostdev-fail.xml         | 39 +++++++++++++++++++
 tests/qemuxml2argvtest.c                      |  4 ++
 3 files changed, 49 insertions(+), 7 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-net-hostdev-fail.xml

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 664397d55a..de6a631e50 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7881,13 +7881,6 @@ qemuBuildInterfaceCommandLine(virCommandPtr cmd,
     if (actualType == VIR_DOMAIN_NET_TYPE_VHOSTUSER)
         return qemuBuildVhostuserCommandLine(cmd, def, net, qemuCaps, bootindex);
 
-    if (actualType == VIR_DOMAIN_NET_TYPE_HOSTDEV) {
-        /* NET_TYPE_HOSTDEV devices are really hostdev devices, so
-         * their commandlines are constructed with other hostdevs.
-         */
-        return 0;
-    }
-
     /* Currently nothing besides TAP devices supports multiqueue. */
     if (net->driver.virtio.queues > 0 &&
         !(actualType == VIR_DOMAIN_NET_TYPE_NETWORK ||
@@ -7967,6 +7960,12 @@ qemuBuildInterfaceCommandLine(virCommandPtr cmd,
         if (qemuInterfaceEthernetConnect(def, driver, net,
                                        tapfd, tapfdSize) < 0)
             goto cleanup;
+    } else if (actualType == VIR_DOMAIN_NET_TYPE_HOSTDEV) {
+        /* NET_TYPE_HOSTDEV devices are really hostdev devices, so
+         * their commandlines are constructed with other hostdevs.
+         */
+        ret = 0;
+        goto cleanup;
     }
 
     /* For types whose implementations use a netdev on the host, add
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-net-hostdev-fail.xml b/tests/qemuxml2argvdata/qemuxml2argv-net-hostdev-fail.xml
new file mode 100644
index 0000000000..7807d793f7
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-net-hostdev-fail.xml
@@ -0,0 +1,39 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='ide' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <interface type='hostdev' managed='yes'>
+      <mac address='00:11:22:33:44:55'/>
+      <source>
+        <address type='pci' domain='0x0000' bus='0x03' slot='0x07' function='0x1'/>
+      </source>
+      <model type='virtio'/>
+      <filterref filter='myfilter'/>
+      <backend tap='/dev/mytap'/>
+      <driver queues='4'/>
+    </interface>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index b9961823f8..3a8835d796 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1109,6 +1109,10 @@ mymain(void)
             QEMU_CAPS_DEVICE_VFIO_PCI, QEMU_CAPS_HOST_PCI_MULTIDOMAIN);
     DO_TEST_FAILURE("net-hostdev-vfio-multidomain",
                     QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_DEVICE_VFIO_PCI);
+    DO_TEST_FAILURE("net-hostdev-fail",
+                    QEMU_CAPS_NODEFCONFIG,
+                    QEMU_CAPS_DEVICE_VFIO_PCI);
+
 
     DO_TEST("serial-vc", NONE);
     DO_TEST("serial-pty", NONE);