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qemu_domain: Set 'passt' net backend if 'default' is unsupported

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It may happen that QEMU is compiled without SLIRP but with
support for passt. In such case it is acceptable to alter user
provided configuration and switch backend to passt as it offers
all the features as SLIRP.

Resolves: https://issues.redhat.com/browse/RHEL-45518
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Michal Privoznik
2024-06-28 09:56:46 +02:00
parent bd6060d1c3
commit 8f34fd0c4c
1 changed files with 16 additions and 3 deletions
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19
src/qemu/qemu_domain.c
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@@ -5975,12 +5975,25 @@ qemuDomainDeviceNetDefPostParse(virDomainNetDef *net,
virQEMUCaps *qemuCaps)
{
if (net->type == VIR_DOMAIN_NET_TYPE_VDPA &&
!virDomainNetGetModelString(net))
!virDomainNetGetModelString(net)) {
net->model = VIR_DOMAIN_NET_MODEL_VIRTIO;
else if (net->type != VIR_DOMAIN_NET_TYPE_HOSTDEV &&
} else if (net->type != VIR_DOMAIN_NET_TYPE_HOSTDEV &&
!virDomainNetGetModelString(net) &&
virDomainNetResolveActualType(net) != VIR_DOMAIN_NET_TYPE_HOSTDEV)
virDomainNetResolveActualType(net) != VIR_DOMAIN_NET_TYPE_HOSTDEV) {
net->model = qemuDomainDefaultNetModel(def, qemuCaps);
}
if (net->type == VIR_DOMAIN_NET_TYPE_USER &&
net->backend.type == VIR_DOMAIN_NET_BACKEND_DEFAULT) {
virDomainCapsDeviceNet netCaps = { };
virQEMUCapsFillDomainDeviceNetCaps(qemuCaps, &netCaps);
if (!VIR_DOMAIN_CAPS_ENUM_IS_SET(netCaps.backendType, VIR_DOMAIN_NET_BACKEND_DEFAULT) &&
VIR_DOMAIN_CAPS_ENUM_IS_SET(netCaps.backendType, VIR_DOMAIN_NET_BACKEND_PASST)) {
net->backend.type = VIR_DOMAIN_NET_BACKEND_PASST;
}
}
return 0;
}