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From 1747bfd95ad80d2453de11e99a7bf9fa53c9aa55 Mon Sep 17 00:00:00 2001
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Message-Id: <1747bfd95ad80d2453de11e99a7bf9fa53c9aa55@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Thu, 23 Nov 2017 19:02:14 +0100
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Subject: [PATCH] qemu: domain: Despaghettify qemuDomainDeviceDefValidate
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Move network device validation into a separate function.
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(cherry picked from commit 577ccd07c35a8e9b9d682778cc7d6c1d34d891f9)
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https://bugzilla.redhat.com/show_bug.cgi?id=1511480
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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 src/qemu/qemu_domain.c | 184 ++++++++++++++++++++++++++-----------------------
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 1 file changed, 97 insertions(+), 87 deletions(-)
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diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
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index 72d67adfe3..30a602a1e9 100644
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--- a/src/qemu/qemu_domain.c
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+++ b/src/qemu/qemu_domain.c
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@@ -3553,102 +3553,112 @@ qemuDomainWatchdogDefValidate(const virDomainWatchdogDef *dev,
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 }
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+static int
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+qemuDomainDeviceDefValidateNetwork(const virDomainNetDef *net)
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+{
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+    bool hasIPv4 = false;
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+    bool hasIPv6 = false;
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+    size_t i;
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+
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+    if (net->type == VIR_DOMAIN_NET_TYPE_USER) {
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+        if (net->guestIP.nroutes) {
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+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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+                           _("Invalid attempt to set network interface "
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+                             "guest-side IP route, not supported by QEMU"));
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+            return -1;
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+        }
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+
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+        for (i = 0; i < net->guestIP.nips; i++) {
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+            const virNetDevIPAddr *ip = net->guestIP.ips[i];
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+
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+            if (VIR_SOCKET_ADDR_VALID(&net->guestIP.ips[i]->peer)) {
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+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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+                               _("Invalid attempt to set peer IP for guest"));
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+                return -1;
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+            }
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+
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+            if (VIR_SOCKET_ADDR_IS_FAMILY(&ip->address, AF_INET)) {
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+                if (hasIPv4) {
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+                    virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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+                                   _("Only one IPv4 address per "
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+                                     "interface is allowed"));
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+                    return -1;
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+                }
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+                hasIPv4 = true;
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+
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+                if (ip->prefix > 27) {
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+                    virReportError(VIR_ERR_XML_ERROR, "%s",
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+                                   _("prefix too long"));
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+                    return -1;
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+                }
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+            }
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+
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+            if (VIR_SOCKET_ADDR_IS_FAMILY(&ip->address, AF_INET6)) {
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+                if (hasIPv6) {
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+                    virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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+                                   _("Only one IPv6 address per "
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+                                     "interface is allowed"));
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+                    return -1;
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+                }
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+                hasIPv6 = true;
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+
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+                if (ip->prefix > 120) {
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+                    virReportError(VIR_ERR_XML_ERROR, "%s",
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+                                   _("prefix too long"));
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+                    return -1;
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+                }
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+            }
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+        }
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+    } else if (net->guestIP.nroutes || net->guestIP.nips) {
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+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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+                       _("Invalid attempt to set network interface "
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+                         "guest-side IP route and/or address info, "
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+                         "not supported by QEMU"));
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+        return -1;
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+    }
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+
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+    if (STREQ_NULLABLE(net->model, "virtio")) {
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+        if (net->driver.virtio.rx_queue_size & (net->driver.virtio.rx_queue_size - 1)) {
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+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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+                           _("rx_queue_size has to be a power of two"));
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+            return -1;
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+        }
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+        if (net->driver.virtio.tx_queue_size & (net->driver.virtio.tx_queue_size - 1)) {
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+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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+                           _("tx_queue_size has to be a power of two"));
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+            return -1;
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+        }
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+    }
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+
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+    if (net->mtu &&
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+        !qemuDomainNetSupportsMTU(net->type)) {
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+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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+                       _("setting MTU on interface type %s is not supported yet"),
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+                       virDomainNetTypeToString(net->type));
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+        return -1;
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+    }
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+
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+    if (net->coalesce && !qemuDomainNetSupportsCoalesce(net->type)) {
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+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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+                       _("coalesce settings on interface type %s are not supported"),
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+                       virDomainNetTypeToString(net->type));
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+        return -1;
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+    }
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+
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+    return 0;
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+}
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+
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+
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 static int
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 qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev,
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                             const virDomainDef *def,
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                             void *opaque ATTRIBUTE_UNUSED)
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 {
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     int ret = -1;
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-    size_t i;
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     if (dev->type == VIR_DOMAIN_DEVICE_NET) {
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-        const virDomainNetDef *net = dev->data.net;
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-        bool hasIPv4 = false, hasIPv6 = false;
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-
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-        if (net->type == VIR_DOMAIN_NET_TYPE_USER) {
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-            if (net->guestIP.nroutes) {
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-                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                               _("Invalid attempt to set network interface "
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-                                 "guest-side IP route, not supported by QEMU"));
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-                goto cleanup;
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-            }
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-
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-            for (i = 0; i < net->guestIP.nips; i++) {
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-                const virNetDevIPAddr *ip = net->guestIP.ips[i];
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-
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-                if (VIR_SOCKET_ADDR_VALID(&net->guestIP.ips[i]->peer)) {
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-                    virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                                   _("Invalid attempt to set peer IP for guest"));
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-                    goto cleanup;
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-                }
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-
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-                if (VIR_SOCKET_ADDR_IS_FAMILY(&ip->address, AF_INET)) {
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-                    if (hasIPv4) {
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-                        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                                       _("Only one IPv4 address per "
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-                                         "interface is allowed"));
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-                        goto cleanup;
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-                    }
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-                    hasIPv4 = true;
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-
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-                    if (ip->prefix > 27) {
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-                        virReportError(VIR_ERR_XML_ERROR, "%s",
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-                                       _("prefix too long"));
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-                        goto cleanup;
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-                    }
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-                }
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-
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-                if (VIR_SOCKET_ADDR_IS_FAMILY(&ip->address, AF_INET6)) {
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-                    if (hasIPv6) {
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-                        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                                       _("Only one IPv6 address per "
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-                                         "interface is allowed"));
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-                        goto cleanup;
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-                    }
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-                    hasIPv6 = true;
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-
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-                    if (ip->prefix > 120) {
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-                        virReportError(VIR_ERR_XML_ERROR, "%s",
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-                                       _("prefix too long"));
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-                        goto cleanup;
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-                    }
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-                }
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-            }
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-        } else if (net->guestIP.nroutes || net->guestIP.nips) {
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-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                           _("Invalid attempt to set network interface "
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-                             "guest-side IP route and/or address info, "
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-                             "not supported by QEMU"));
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+        if (qemuDomainDeviceDefValidateNetwork(dev->data.net) < 0)
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             goto cleanup;
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-        }
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-
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-        if (STREQ_NULLABLE(net->model, "virtio")) {
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-            if (net->driver.virtio.rx_queue_size & (net->driver.virtio.rx_queue_size - 1)) {
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-                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                               _("rx_queue_size has to be a power of two"));
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-                goto cleanup;
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-            }
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-            if (net->driver.virtio.tx_queue_size & (net->driver.virtio.tx_queue_size - 1)) {
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-                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                               _("tx_queue_size has to be a power of two"));
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-                goto cleanup;
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-            }
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-        }
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-
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-        if (net->mtu &&
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-            !qemuDomainNetSupportsMTU(net->type)) {
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-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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-                           _("setting MTU on interface type %s is not supported yet"),
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-                           virDomainNetTypeToString(net->type));
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-            goto cleanup;
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-        }
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-
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-        if (net->coalesce && !qemuDomainNetSupportsCoalesce(net->type)) {
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-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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-                           _("coalesce settings on interface type %s are not supported"),
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-                           virDomainNetTypeToString(net->type));
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-            goto cleanup;
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-        }
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     } else if (dev->type == VIR_DOMAIN_DEVICE_CHR) {
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         if (qemuDomainChrDefValidate(dev->data.chr, def) < 0)
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             goto cleanup;
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-- 
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2.15.0
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