[PATCH 28/30] qemuxml2argvmock: Use real FDs for interface tests

21 May 2026

From: Peter Krempa <pkrempa@redhat.com>

Similarly to previous commits use real FDs so that we don't risk
collisions.

Note that for the test cases passing multiple tap and vhost FDs the
helpers which stabilize the output don't actually work, as the FDs are
concatenated. For now we'll not deal with this and simply leave them
censored by the 'XXXXXXX' string.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
---
 tests/qemuxml2argvmock.c                      | 19 +++++++++----------
 .../downscript.x86_64-latest.args             |  2 +-
 .../graphics-spice-timeout.x86_64-latest.args |  2 +-
 .../net-bandwidth.x86_64-latest.args          |  2 +-
 .../net-bandwidth2.x86_64-latest.args         |  2 +-
 .../net-coalesce.x86_64-latest.args           |  6 +++---
 .../net-eth-hostip.x86_64-latest.args         |  2 +-
 .../net-eth-ifname.x86_64-latest.args         |  2 +-
 .../net-eth-names.x86_64-latest.args          |  4 ++--
 .../net-eth-unmanaged-tap.x86_64-latest.args  |  2 +-
 .../net-eth.x86_64-latest.args                |  2 +-
 .../net-isolated-port.x86_64-latest.args      |  2 +-
 .../net-midonet.x86_64-latest.args            |  2 +-
 .../net-mtu.x86_64-latest.args                |  4 ++--
 .../net-openvswitch.x86_64-latest.args        |  2 +-
 ...irtio-network-portgroup.x86_64-latest.args |  6 +++---
 ...-virtio-teaming-network.x86_64-latest.args |  2 +-
 .../net-virtio-vhost.x86_64-latest.args       |  2 +-
 .../tap-vhost-incorrect.x86_64-latest.args    |  4 ++--
 .../user-aliases.x86_64-latest.args           |  2 +-
 20 files changed, 35 insertions(+), 36 deletions(-)

diff --git a/tests/qemuxml2argvmock.c b/tests/qemuxml2argvmock.c
index de10117330..0440bb15e2 100644
--- a/tests/qemuxml2argvmock.c
+++ b/tests/qemuxml2argvmock.c
@@ -105,22 +105,21 @@ virNetDevTapCreate(char **ifname,
 {
     size_t i;

-    for (i = 0; i < tapfdSize; i++)
-        tapfd[i] = 2900 + i;
-
-    if (STREQ_NULLABLE(*ifname, "mytap0")) {
-        return 0;
-    } else {
+    if (STRNEQ_NULLABLE(*ifname, "mytap0")) {
         VIR_FREE(*ifname);
         *ifname = g_strdup("vnet0");
-        return 0;
     }
+
+    for (i = 0; i < tapfdSize; i++)
+        tapfd[i] = virTestMakeDummyFD(g_strdup_printf("@tap-%s-fd@", *ifname));
+
+    return 0;
 }


 int
 virDomainInterfaceBridgeConnect(virDomainDef *def G_GNUC_UNUSED,
-                                virDomainNetDef *net G_GNUC_UNUSED,
+                                virDomainNetDef *net,
                                 int *tapfd,
                                 size_t *tapfdSize,
                                 bool privileged G_GNUC_UNUSED,
@@ -131,7 +130,7 @@ virDomainInterfaceBridgeConnect(virDomainDef *def G_GNUC_UNUSED,
     size_t i;

     for (i = 0; i < *tapfdSize; i++)
-        tapfd[i] = 2800 + i;
+        tapfd[i] = virTestMakeDummyFD(g_strdup_printf("@iface-%s-fd@", net->info.alias));

     return 0;
 }
@@ -235,7 +234,7 @@ qemuInterfaceOpenVhostNet(virDomainObj *vm G_GNUC_UNUSED,

     for (i = 0; i < vhostfdSize; i++) {
         g_autofree char *name = g_strdup_printf("vhostfd-%s%zu", net->info.alias, i);
-        int fd = 2200 + i;
+        int fd = virTestMakeDummyFD(g_strdup_printf("@vhostfd-%s-fd@", net->info.alias));

         netpriv->vhostfds = g_slist_prepend(netpriv->vhostfds, qemuFDPassDirectNew(name, &fd));
     }
diff --git a/tests/qemuxmlconfdata/downscript.x86_64-latest.args b/tests/qemuxmlconfdata/downscript.x86_64-latest.args
index d0054089b6..d3b1b8ec23 100644
--- a/tests/qemuxmlconfdata/downscript.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/downscript.x86_64-latest.args
@@ -34,7 +34,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"virtio-9p-pci","id":"fs0","fsdev":"fsdev-fs0","mount_tag":"fs1","bus":"pci.0","addr":"0x3"}' \
 -fsdev local,security_model=mapped,id=fsdev-fs1,path=/export/fs2 \
 -device '{"driver":"virtio-9p-pci","id":"fs1","fsdev":"fsdev-fs1","mount_tag":"fs2","bus":"pci.0","addr":"0x4"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","vhost":true,"vhostfd":"@vhostfd-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet0","id":"net0","mac":"52:54:00:f6:66:88","bus":"pci.0","addr":"0xb"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0xc"}' \
diff --git a/tests/qemuxmlconfdata/graphics-spice-timeout.x86_64-latest.args b/tests/qemuxmlconfdata/graphics-spice-timeout.x86_64-latest.args
index cd5c91f9c4..841a161654 100644
--- a/tests/qemuxmlconfdata/graphics-spice-timeout.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/graphics-spice-timeout.x86_64-latest.args
@@ -27,7 +27,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-f14/.config \
 -boot menu=on,strict=on \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -device '{"driver":"virtio-serial-pci","id":"virtio-serial0","bus":"pci.0","addr":"0x6"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","id":"hostnet0"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet0","id":"net0","mac":"52:54:00:71:70:89","bus":"pci.0","addr":"0x7"}' \
 -device '{"driver":"usb-tablet","id":"input0","bus":"usb.0","port":"1"}' \
 -audiodev '{"id":"audio1","driver":"spice"}' \
diff --git a/tests/qemuxmlconfdata/net-bandwidth.x86_64-latest.args b/tests/qemuxmlconfdata/net-bandwidth.x86_64-latest.args
index 210ae98d3c..e1d4e5c902 100644
--- a/tests/qemuxmlconfdata/net-bandwidth.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-bandwidth.x86_64-latest.args
@@ -32,7 +32,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-f14-60/.config \
 -device '{"driver":"virtio-blk-pci","bus":"pci.0","addr":"0x4","drive":"libvirt-2-format","id":"virtio-disk0","bootindex":2}' \
 -blockdev '{"driver":"file","filename":"/home/zippy/tmp/Fedora-14-x86_64-Live-KDE.iso","node-name":"libvirt-1-storage","read-only":true}' \
 -device '{"driver":"ide-cd","bus":"ide.1","unit":0,"drive":"libvirt-1-storage","id":"ide0-1-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet0","id":"net0","mac":"52:54:00:24:a5:9f","bus":"pci.0","addr":"0x7"}' \
 -chardev pty,id=charserial0 \
 -device '{"driver":"isa-serial","chardev":"charserial0","id":"serial0","index":0}' \
diff --git a/tests/qemuxmlconfdata/net-bandwidth2.x86_64-latest.args b/tests/qemuxmlconfdata/net-bandwidth2.x86_64-latest.args
index 573c24ba17..edcdaa997e 100644
--- a/tests/qemuxmlconfdata/net-bandwidth2.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-bandwidth2.x86_64-latest.args
@@ -30,7 +30,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-f14-60/.config \
 -blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/f14-6.img","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
 -blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"qcow2","file":"libvirt-1-storage"}' \
 -device '{"driver":"virtio-blk-pci","bus":"pci.0","addr":"0x4","drive":"libvirt-1-format","id":"virtio-disk0","bootindex":2}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet0","id":"net0","mac":"52:54:00:24:a5:9f","bus":"pci.0","addr":"0x7"}' \
 -chardev pty,id=charserial0 \
 -device '{"driver":"isa-serial","chardev":"charserial0","id":"serial0","index":0}' \
diff --git a/tests/qemuxmlconfdata/net-coalesce.x86_64-latest.args b/tests/qemuxmlconfdata/net-coalesce.x86_64-latest.args
index 9c061e4e6f..26c174778a 100644
--- a/tests/qemuxmlconfdata/net-coalesce.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-coalesce.x86_64-latest.args
@@ -33,11 +33,11 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-test/.config \
 -device '{"driver":"virtio-blk-pci","event_idx":true,"bus":"pci.0","addr":"0x4","drive":"libvirt-2-format","id":"virtio-disk0","bootindex":2}' \
 -blockdev '{"driver":"file","filename":"/var/lib/libvirt/Fedora-14-x86_64-Live-KDE.iso","node-name":"libvirt-1-storage","read-only":true}' \
 -device '{"driver":"ide-cd","bus":"ide.1","unit":0,"drive":"libvirt-1-storage","id":"ide0-1-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","vhost":true,"vhostfd":"@vhostfd-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet0","id":"net0","mac":"52:54:00:e5:48:58","bus":"pci.0","addr":"0x2"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet1"}' \
+-netdev '{"type":"tap","fd":"@iface-net1-fd@","vhost":true,"vhostfd":"@vhostfd-net1-fd@","id":"hostnet1"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet1","id":"net1","mac":"52:54:00:e5:48:59","bus":"pci.0","addr":"0x3"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet2"}' \
+-netdev '{"type":"tap","fd":"@iface-net2-fd@","vhost":true,"vhostfd":"@vhostfd-net2-fd@","id":"hostnet2"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet2","id":"net2","mac":"52:54:00:e5:48:60","bus":"pci.0","addr":"0x5"}' \
 -chardev pty,id=charserial0 \
 -device '{"driver":"isa-serial","chardev":"charserial0","id":"serial0","index":0}' \
diff --git a/tests/qemuxmlconfdata/net-eth-hostip.x86_64-latest.args b/tests/qemuxmlconfdata/net-eth-hostip.x86_64-latest.args
index 6a9b53ca52..2bea0659df 100644
--- a/tests/qemuxmlconfdata/net-eth-hostip.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-eth-hostip.x86_64-latest.args
@@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","id":"hostnet0"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet0","id":"net0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
diff --git a/tests/qemuxmlconfdata/net-eth-ifname.x86_64-latest.args b/tests/qemuxmlconfdata/net-eth-ifname.x86_64-latest.args
index 6a9b53ca52..2bea0659df 100644
--- a/tests/qemuxmlconfdata/net-eth-ifname.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-eth-ifname.x86_64-latest.args
@@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","id":"hostnet0"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet0","id":"net0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
diff --git a/tests/qemuxmlconfdata/net-eth-names.x86_64-latest.args b/tests/qemuxmlconfdata/net-eth-names.x86_64-latest.args
index 70845d070a..4e7109e54a 100644
--- a/tests/qemuxmlconfdata/net-eth-names.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-eth-names.x86_64-latest.args
@@ -29,9 +29,9 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","id":"hostnet0"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet0","id":"net0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet1"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","id":"hostnet1"}' \
 -device '{"driver":"e1000","netdev":"hostnet1","id":"net1","mac":"00:11:22:33:44:56","bus":"pci.0","addr":"0x3"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x4"}' \
diff --git a/tests/qemuxmlconfdata/net-eth-unmanaged-tap.x86_64-latest.args b/tests/qemuxmlconfdata/net-eth-unmanaged-tap.x86_64-latest.args
index 2c441611ca..695a08b9a9 100644
--- a/tests/qemuxmlconfdata/net-eth-unmanaged-tap.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-eth-unmanaged-tap.x86_64-latest.args
@@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@tap-mytap0-fd@","vhost":true,"vhostfd":"@vhostfd-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet0","id":"net0","mac":"fe:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
diff --git a/tests/qemuxmlconfdata/net-eth.x86_64-latest.args b/tests/qemuxmlconfdata/net-eth.x86_64-latest.args
index 6a9b53ca52..2bea0659df 100644
--- a/tests/qemuxmlconfdata/net-eth.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-eth.x86_64-latest.args
@@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","id":"hostnet0"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet0","id":"net0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
diff --git a/tests/qemuxmlconfdata/net-isolated-port.x86_64-latest.args b/tests/qemuxmlconfdata/net-isolated-port.x86_64-latest.args
index 20f83c0f16..d76c6fa4ac 100644
--- a/tests/qemuxmlconfdata/net-isolated-port.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-isolated-port.x86_64-latest.args
@@ -32,7 +32,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-q35-test/.config \
 -device '{"driver":"qemu-xhci","id":"usb","bus":"pci.2","addr":"0x0"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","drive":"libvirt-1-storage","id":"sata0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","vhost":true,"vhostfd":"@vhostfd-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet0","id":"net0","mac":"52:54:00:d6:c0:0b","bus":"pci.1","addr":"0x0"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -device '{"driver":"qxl-vga","id":"video0","max_outputs":1,"ram_size":67108864,"vram_size":33554432,"vram64_size_mb":0,"vgamem_mb":8,"bus":"pcie.0","addr":"0x1"}' \
diff --git a/tests/qemuxmlconfdata/net-midonet.x86_64-latest.args b/tests/qemuxmlconfdata/net-midonet.x86_64-latest.args
index f5bac0b91c..e98688963c 100644
--- a/tests/qemuxmlconfdata/net-midonet.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-midonet.x86_64-latest.args
@@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","vhost":true,"vhostfd":"@vhostfd-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet0","id":"net0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x3"}' \
diff --git a/tests/qemuxmlconfdata/net-mtu.x86_64-latest.args b/tests/qemuxmlconfdata/net-mtu.x86_64-latest.args
index ce88e8b1ba..0479462ebb 100644
--- a/tests/qemuxmlconfdata/net-mtu.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-mtu.x86_64-latest.args
@@ -33,9 +33,9 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-test/.config \
 -device '{"driver":"virtio-blk-pci","event_idx":true,"bus":"pci.0","addr":"0x4","drive":"libvirt-2-format","id":"virtio-disk0","bootindex":2}' \
 -blockdev '{"driver":"file","filename":"/var/lib/libvirt/Fedora-14-x86_64-Live-KDE.iso","node-name":"libvirt-1-storage","read-only":true}' \
 -device '{"driver":"ide-cd","bus":"ide.1","unit":0,"drive":"libvirt-1-storage","id":"ide0-1-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","vhost":true,"vhostfd":"@vhostfd-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"virtio-net-pci","host_mtu":1500,"netdev":"hostnet0","id":"net0","mac":"52:54:00:e5:48:58","bus":"pci.0","addr":"0x2"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","sndbuf":1600,"id":"hostnet1"}' \
+-netdev '{"type":"tap","fd":"@iface-net1-fd@","vhost":true,"vhostfd":"@vhostfd-net1-fd@","sndbuf":1600,"id":"hostnet1"}' \
 -device '{"driver":"virtio-net-pci","host_mtu":9000,"netdev":"hostnet1","id":"net1","mac":"52:54:00:e5:48:59","bus":"pci.0","addr":"0x3"}' \
 -chardev pty,id=charserial0 \
 -device '{"driver":"isa-serial","chardev":"charserial0","id":"serial0","index":0}' \
diff --git a/tests/qemuxmlconfdata/net-openvswitch.x86_64-latest.args b/tests/qemuxmlconfdata/net-openvswitch.x86_64-latest.args
index 31cc8cbbf3..813b0509d6 100644
--- a/tests/qemuxmlconfdata/net-openvswitch.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-openvswitch.x86_64-latest.args
@@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet0","id":"net0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x3"}' \
diff --git a/tests/qemuxmlconfdata/net-virtio-network-portgroup.x86_64-latest.args b/tests/qemuxmlconfdata/net-virtio-network-portgroup.x86_64-latest.args
index c01bc60976..7c0e901f1d 100644
--- a/tests/qemuxmlconfdata/net-virtio-network-portgroup.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-virtio-network-portgroup.x86_64-latest.args
@@ -29,11 +29,11 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","vhost":true,"vhostfd":"@vhostfd-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet0","id":"net0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet1"}' \
+-netdev '{"type":"tap","fd":"@iface-net1-fd@","id":"hostnet1"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet1","id":"net1","mac":"10:11:22:33:44:55","bus":"pci.0","addr":"0x3"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet2"}' \
+-netdev '{"type":"tap","fd":"@iface-net2-fd@","id":"hostnet2"}' \
 -device '{"driver":"rtl8139","netdev":"hostnet2","id":"net2","mac":"22:11:22:33:44:55","bus":"pci.0","addr":"0x4"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x5"}' \
diff --git a/tests/qemuxmlconfdata/net-virtio-teaming-network.x86_64-latest.args b/tests/qemuxmlconfdata/net-virtio-teaming-network.x86_64-latest.args
index 2c2c219ba4..0a55473d12 100644
--- a/tests/qemuxmlconfdata/net-virtio-teaming-network.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-virtio-teaming-network.x86_64-latest.args
@@ -29,7 +29,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-QEMUGuest1/.config \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","read-only":false}' \
 -device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-storage","id":"ide0-0-0","bootindex":1}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostua-backup0"}' \
+-netdev '{"type":"tap","fd":"@iface-ua-backup0-fd@","vhost":true,"vhostfd":"@vhostfd-ua-backup0-fd@","id":"hostua-backup0"}' \
 -device '{"driver":"virtio-net-pci","failover":true,"netdev":"hostua-backup0","id":"ua-backup0","mac":"00:11:22:33:44:55","bus":"pci.0","addr":"0x2"}' \
 -audiodev '{"id":"audio1","driver":"none"}' \
 -device '{"driver":"vfio-pci","host":"0000:06:12.2","id":"hostdev0","failover_pair_id":"ua-backup0","bus":"pci.0","addr":"0x3"}' \
diff --git a/tests/qemuxmlconfdata/net-virtio-vhost.x86_64-latest.args b/tests/qemuxmlconfdata/net-virtio-vhost.x86_64-latest.args
index c77cbd2a71..acbb8a53ec 100644
--- a/tests/qemuxmlconfdata/net-virtio-vhost.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/net-virtio-vhost.x86_64-latest.args
@@ -30,7 +30,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-test/.config \
 -device '{"driver":"virtio-serial-pci","id":"virtio-serial0","bus":"pci.0","addr":"0x6"}' \
 -netdev '{"type":"tap","fds":"XXXXXXX","vhost":true,"vhostfds":"XXXXXXX","id":"hostnet0"}' \
 -device '{"driver":"virtio-net-pci","mq":true,"vectors":12,"netdev":"hostnet0","id":"net0","mac":"52:54:00:e5:48:58","bus":"pci.0","addr":"0x2"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet1"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","vhost":true,"vhostfd":"@vhostfd-net1-fd@","id":"hostnet1"}' \
 -device '{"driver":"virtio-net-pci","ioeventfd":true,"netdev":"hostnet1","id":"net1","mac":"52:54:00:e5:48:59","bus":"pci.0","addr":"0x3"}' \
 -netdev '{"type":"tap","fds":"XXXXXXX","vhost":true,"vhostfds":"XXXXXXX","id":"hostnet2"}' \
 -device '{"driver":"virtio-net-pci","ioeventfd":true,"mq":true,"vectors":12,"netdev":"hostnet2","id":"net2","mac":"52:54:00:e5:48:5a","bus":"pci.0","addr":"0x4"}' \
diff --git a/tests/qemuxmlconfdata/tap-vhost-incorrect.x86_64-latest.args b/tests/qemuxmlconfdata/tap-vhost-incorrect.x86_64-latest.args
index 9e0df73d75..156683c5a0 100644
--- a/tests/qemuxmlconfdata/tap-vhost-incorrect.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/tap-vhost-incorrect.x86_64-latest.args
@@ -28,9 +28,9 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-test/.config \
 -boot menu=on,strict=on \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -device '{"driver":"virtio-serial-pci","id":"virtio-serial0","bus":"pci.0","addr":"0x6"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","id":"hostnet0"}' \
+-netdev '{"type":"tap","fd":"@iface-net0-fd@","id":"hostnet0"}' \
 -device '{"driver":"e1000","netdev":"hostnet0","id":"net0","mac":"52:54:00:e5:48:58","bus":"pci.0","addr":"0x2"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostnet1"}' \
+-netdev '{"type":"tap","fd":"@iface-net1-fd@","vhost":true,"vhostfd":"@vhostfd-net1-fd@","id":"hostnet1"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostnet1","id":"net1","mac":"52:54:00:e5:48:59","bus":"pci.0","addr":"0x3"}' \
 -chardev pty,id=charserial0 \
 -device '{"driver":"isa-serial","chardev":"charserial0","id":"serial0","index":0}' \
diff --git a/tests/qemuxmlconfdata/user-aliases.x86_64-latest.args b/tests/qemuxmlconfdata/user-aliases.x86_64-latest.args
index f5ca356773..bd48634c40 100644
--- a/tests/qemuxmlconfdata/user-aliases.x86_64-latest.args
+++ b/tests/qemuxmlconfdata/user-aliases.x86_64-latest.args
@@ -49,7 +49,7 @@ XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-gentoo/.config \
 -device '{"driver":"virtio-blk-pci","bus":"pci.0","addr":"0x7","drive":"libvirt-2-format","id":"ua-myEncryptedDisk1"}' \
 -blockdev '{"driver":"file","filename":"/home/zippy/tmp/install-amd64-minimal-20140619.iso","node-name":"libvirt-1-storage","read-only":true,"cache":{"direct":true,"no-flush":false}}' \
 -device '{"driver":"ide-cd","bus":"ide.1","unit":0,"share-rw":true,"drive":"libvirt-1-storage","id":"ua-WhatAnAwesomeCDROM","bootindex":2,"write-cache":"on"}' \
--netdev '{"type":"tap","fd":"XXXXXXX","vhost":true,"vhostfd":"XXXXXXX","id":"hostua-CheckoutThisNIC"}' \
+-netdev '{"type":"tap","fd":"@tap-vnet0-fd@","vhost":true,"vhostfd":"@vhostfd-ua-CheckoutThisNIC-fd@","id":"hostua-CheckoutThisNIC"}' \
 -device '{"driver":"virtio-net-pci","netdev":"hostua-CheckoutThisNIC","id":"ua-CheckoutThisNIC","mac":"52:54:00:d6:c0:0b","bus":"pci.0","addr":"0x3"}' \
 -netdev '{"type":"socket","listen":"127.0.0.1:1234","id":"hostua-WeCanAlsoDoServerMode"}' \
 -device '{"driver":"rtl8139","netdev":"hostua-WeCanAlsoDoServerMode","id":"ua-WeCanAlsoDoServerMode","mac":"52:54:00:22:c9:42","bus":"pci.0","addr":"0x9"}' \
-- 
2.54.0

    