[libvirt] [PATCH v2 2/2] qemu: network user/direct/hostdev do not support backend.

The tag backend is not supported for user/direct/hostdev network when you try to define them inside the domain XML. So, other ways to include devices cannot be permitted too. But the attach-device command is wrongly adding unsupported features. This commit fixes this bug. After the patch: virsh # attach-device rhel7.4 backend.xml error: Failed to attach device from backend.xml error: unsupported configuration: Custom tap device path is not supported for: user Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1480251 Signed-off-by: Julio Faracco <jcfaracco(a)gmail.com&gt; --- src/qemu/qemu_domain.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index cc7596b..0215b2a 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -3608,6 +3608,13 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, goto cleanup; } + if (net->backend.tap) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Custom tap device path is not supported for: %s"), + virDomainNetTypeToString(net->type)); + goto cleanup; + } + for (i = 0; i < net->guestIP.nips; i++) { const virNetDevIPAddr *ip = net->guestIP.ips[i]; @@ -3649,6 +3656,14 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, } } } + } else if (net->type == VIR_DOMAIN_NET_TYPE_DIRECT || + net->type == VIR_DOMAIN_NET_TYPE_HOSTDEV) { + if (net->backend.tap) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Custom tap device path is not supported for: %s"), + virDomainNetTypeToString(net->type)); + goto cleanup; + } } else if (net->guestIP.nroutes || net->guestIP.nips) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("Invalid attempt to set network interface " -- 2.7.4