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From 653245c4de76aba4e75131da8d40eed5b15ffd0d Mon Sep 17 00:00:00 2001
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Message-Id: <653245c4de76aba4e75131da8d40eed5b15ffd0d@dist-git>
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From: Laine Stump <laine@redhat.com>
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Date: Thu, 30 Jan 2020 14:12:40 -0500
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Subject: [PATCH] conf: parse/format <teaming> subelement of <interface>
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The subelement <teaming> of <interface> devices is used to configure a
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simple teaming association between two interfaces in a domain. Example:
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  <interface type='bridge'>
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    <source bridge='br0'/>
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    <model type='virtio'/>
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    <mac address='00:11:22:33:44:55'/>
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    <alias name='ua-backup0'/>
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    <teaming type='persistent'/>
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  </interface>
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  <interface type='hostdev'>
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    <source>
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      <address type='pci' bus='0x02' slot='0x10' function='0x4'/>
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    </source>
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    <mac address='00:11:22:33:44:55'/>
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    <teaming type='transient' persistent='ua-backup0'/>
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  </interface>
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The interface with <teaming type='persistent'/> is assumed to always
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be present, while the interface with type='transient' may be be
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unplugged and later re-plugged; the persistent='blah' attribute (and
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in the one currently available implementation, also the matching MAC
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addresses) is what associates the two devices with each other. It is
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up to the hypervisor and the guest network drivers to determine what
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to do with this information.
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Signed-off-by: Laine Stump <laine@redhat.com>
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Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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(cherry picked from commit fb0509d06ac57434c2edbd81ee63deb32a0e598a)
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https://bugzilla.redhat.com/1693587
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Signed-off-by: Laine Stump <laine@redhat.com>
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Message-Id: <20200130191244.24174-3-laine@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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 docs/schemas/domaincommon.rng                 | 19 ++++++
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 src/conf/domain_conf.c                        | 47 +++++++++++++
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 src/conf/domain_conf.h                        | 14 ++++
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 .../net-virtio-teaming-network.xml            | 37 +++++++++++
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 tests/qemuxml2argvdata/net-virtio-teaming.xml | 50 ++++++++++++++
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 .../net-virtio-teaming-network.xml            | 51 ++++++++++++++
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 .../qemuxml2xmloutdata/net-virtio-teaming.xml | 66 +++++++++++++++++++
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 tests/qemuxml2xmltest.c                       |  6 ++
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 8 files changed, 290 insertions(+)
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 create mode 100644 tests/qemuxml2argvdata/net-virtio-teaming-network.xml
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 create mode 100644 tests/qemuxml2argvdata/net-virtio-teaming.xml
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 create mode 100644 tests/qemuxml2xmloutdata/net-virtio-teaming-network.xml
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 create mode 100644 tests/qemuxml2xmloutdata/net-virtio-teaming.xml
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diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
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index 76d94b156f..026e753567 100644
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--- a/docs/schemas/domaincommon.rng
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+++ b/docs/schemas/domaincommon.rng
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@@ -3158,6 +3158,25 @@
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       <optional>
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         <ref name="vlan"/>
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       </optional>
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+      <optional>
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+        <element name="teaming">
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+          <choice>
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+            <group>
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+              <attribute name="type">
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+                <value>persistent</value>
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+              </attribute>
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+            </group>
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+            <group>
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+              <attribute name="type">
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+                <value>transient</value>
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+              </attribute>
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+              <attribute name="persistent">
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+                <ref name="aliasName"/>
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+              </attribute>
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+            </group>
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+          </choice>
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+        </element>
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+      </optional>
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     </interleave>
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   </define>
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diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
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index 0478914c69..58f72b3b0f 100644
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--- a/src/conf/domain_conf.c
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+++ b/src/conf/domain_conf.c
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@@ -554,6 +554,13 @@ VIR_ENUM_IMPL(virDomainNetVirtioTxMode,
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               "timer",
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 );
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+VIR_ENUM_IMPL(virDomainNetTeaming,
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+              VIR_DOMAIN_NET_TEAMING_TYPE_LAST,
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+              "none",
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+              "persistent",
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+              "transient",
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+);
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+
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 VIR_ENUM_IMPL(virDomainNetInterfaceLinkState,
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               VIR_DOMAIN_NET_INTERFACE_LINK_STATE_LAST,
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               "default",
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@@ -6276,6 +6283,21 @@ virDomainNetDefValidate(const virDomainNetDef *net)
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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->teaming.type == VIR_DOMAIN_NET_TEAMING_TYPE_TRANSIENT) {
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+        if (!net->teaming.persistent) {
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+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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+                           _("teaming persistent attribute must be set if teaming type is 'transient'"));
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+            return -1;
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+        }
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+    } else {
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+        if (net->teaming.persistent) {
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+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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+                           _("teaming persistent attribute not allowed if teaming type is '%s'"),
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+                           virDomainNetTeamingTypeToString(net->teaming.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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@@ -11574,6 +11596,8 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
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     g_autofree char *vhostuser_type = NULL;
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     g_autofree char *trustGuestRxFilters = NULL;
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     g_autofree char *vhost_path = NULL;
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+    g_autofree char *teamingType = NULL;
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+    g_autofree char *teamingPersistent = NULL;
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     const char *prefix = xmlopt ? xmlopt->config.netPrefix : NULL;
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     if (!(def = virDomainNetDefNew(xmlopt)))
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@@ -11775,6 +11799,10 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
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                 if (!vhost_path && (tmp = virXMLPropString(cur, "vhost")))
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                     vhost_path = virFileSanitizePath(tmp);
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                 VIR_FREE(tmp);
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+            } else if (virXMLNodeNameEqual(cur, "teaming") &&
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+                       !teamingType && !teamingPersistent) {
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+                teamingType = virXMLPropString(cur, "type");
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+                teamingPersistent =  virXMLPropString(cur, "persistent");
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             }
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         }
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         cur = cur->next;
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@@ -12296,6 +12324,19 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
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         }
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     }
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+    if (teamingType) {
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+        int tmpTeaming;
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+
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+        if ((tmpTeaming = virDomainNetTeamingTypeFromString(teamingType)) <= 0) {
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+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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+                           _("unknown teaming type '%s'"),
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+                           teamingType);
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+            goto error;
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+        }
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+        def->teaming.type = tmpTeaming;
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+    }
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+    def->teaming.persistent = g_steal_pointer(&teamingPersistent);
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+
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     rv = virXPathULong("string(./tune/sndbuf)", ctxt, &def->tune.sndbuf);
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     if (rv >= 0) {
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         def->tune.sndbuf_specified = true;
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@@ -25741,6 +25782,12 @@ virDomainNetDefFormat(virBufferPtr buf,
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         virBufferAddLit(buf,   "</tune>\n");
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     }
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+    if (def->teaming.type != VIR_DOMAIN_NET_TEAMING_TYPE_NONE) {
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+        virBufferAsprintf(buf, "
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+                          virDomainNetTeamingTypeToString(def->teaming.type));
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+        virBufferEscapeString(buf, " persistent='%s'", def->teaming.persistent);
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+        virBufferAddLit(buf, "/>\n");
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+    }
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     if (def->linkstate) {
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         virBufferAsprintf(buf, "<link state='%s'/>\n",
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                           virDomainNetInterfaceLinkStateTypeToString(def->linkstate));
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diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
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index 6ae89fa498..ee8eb3ddc0 100644
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--- a/src/conf/domain_conf.h
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+++ b/src/conf/domain_conf.h
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@@ -884,6 +884,15 @@ typedef enum {
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     VIR_DOMAIN_NET_VIRTIO_TX_MODE_LAST
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 } virDomainNetVirtioTxModeType;
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+/* the type of teaming device */
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+typedef enum {
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+    VIR_DOMAIN_NET_TEAMING_TYPE_NONE,
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+    VIR_DOMAIN_NET_TEAMING_TYPE_PERSISTENT,
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+    VIR_DOMAIN_NET_TEAMING_TYPE_TRANSIENT,
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+
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+    VIR_DOMAIN_NET_TEAMING_TYPE_LAST
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+} virDomainNetTeamingType;
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+
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 /* link interface states */
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 typedef enum {
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         VIR_DOMAIN_NET_INTERFACE_LINK_STATE_DEFAULT = 0, /* Default link state (up) */
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@@ -958,6 +967,10 @@ struct _virDomainNetDef {
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         char *tap;
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         char *vhost;
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     } backend;
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+    struct {
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+        virDomainNetTeamingType type;
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+        char *persistent; /* alias name of persistent device */
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+    } teaming;
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     union {
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         virDomainChrSourceDefPtr vhostuser;
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         struct {
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@@ -3425,6 +3438,7 @@ VIR_ENUM_DECL(virDomainFSModel);
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 VIR_ENUM_DECL(virDomainNet);
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 VIR_ENUM_DECL(virDomainNetBackend);
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 VIR_ENUM_DECL(virDomainNetVirtioTxMode);
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+VIR_ENUM_DECL(virDomainNetTeaming);
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 VIR_ENUM_DECL(virDomainNetInterfaceLinkState);
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 VIR_ENUM_DECL(virDomainNetModel);
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 VIR_ENUM_DECL(virDomainChrDevice);
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diff --git a/tests/qemuxml2argvdata/net-virtio-teaming-network.xml b/tests/qemuxml2argvdata/net-virtio-teaming-network.xml
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new file mode 100644
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index 0000000000..edab52f3a1
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--- /dev/null
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+++ b/tests/qemuxml2argvdata/net-virtio-teaming-network.xml
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@@ -0,0 +1,37 @@
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+<domain type='qemu'>
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+  <name>QEMUGuest1</name>
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+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
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+  <memory unit='KiB'>219100</memory>
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+  <currentMemory unit='KiB'>219100</currentMemory>
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+  <vcpu placement='static'>1</vcpu>
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+  <os>
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+    <type arch='i686' machine='pc'>hvm</type>
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+    <boot dev='hd'/>
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+  </os>
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+  <clock offset='utc'/>
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+  <on_poweroff>destroy</on_poweroff>
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+  <on_reboot>restart</on_reboot>
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+  <on_crash>destroy</on_crash>
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+  <devices>
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+    <emulator>/usr/bin/qemu-system-i386</emulator>
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+    <disk type='block' device='disk'>
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+      <source dev='/dev/HostVG/QEMUGuest1'/>
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+      <target dev='hda' bus='ide'/>
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+    </disk>
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+    <controller type='usb' index='0'/>
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+    <interface type='network'>
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+      <mac address='00:11:22:33:44:55'/>
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+      <source network='mybridge'/>
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+      <model type='virtio'/>
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+      <teaming type='persistent'/>
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+      <alias name='ua-backup0'/>
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+    </interface>
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+    <interface type='network'>
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+      <mac address='00:11:22:33:44:55'/>
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+      <source network='myhostdevpool'/>
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+      <model type='virtio'/>
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+      <teaming type='transient' persistent='ua-backup0'/>
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+    </interface>
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+    <memballoon model='virtio'/>
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+  </devices>
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+</domain>
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diff --git a/tests/qemuxml2argvdata/net-virtio-teaming.xml b/tests/qemuxml2argvdata/net-virtio-teaming.xml
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new file mode 100644
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index 0000000000..830ce28524
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--- /dev/null
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+++ b/tests/qemuxml2argvdata/net-virtio-teaming.xml
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@@ -0,0 +1,50 @@
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+<domain type='qemu'>
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+  <name>QEMUGuest1</name>
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+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
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+  <memory unit='KiB'>219100</memory>
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+  <currentMemory unit='KiB'>219100</currentMemory>
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+  <vcpu placement='static'>1</vcpu>
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+  <os>
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+    <type arch='i686' machine='pc'>hvm</type>
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+    <boot dev='hd'/>
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+  </os>
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+  <clock offset='utc'/>
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+  <on_poweroff>destroy</on_poweroff>
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+  <on_reboot>restart</on_reboot>
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+  <on_crash>destroy</on_crash>
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+  <devices>
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+    <emulator>/usr/bin/qemu-system-i386</emulator>
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+    <disk type='block' device='disk'>
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+      <source dev='/dev/HostVG/QEMUGuest1'/>
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+      <target dev='hda' bus='ide'/>
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+    </disk>
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+    <controller type='usb' index='0'/>
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+    <interface type='user'>
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+      <mac address='00:11:22:33:44:55'/>
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+      <model type='virtio'/>
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+      <teaming type='persistent'/>
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+      <alias name='ua-backup0'/>
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+    </interface>
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+    <interface type='user'>
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+      <mac address='66:44:33:22:11:00'/>
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+      <model type='virtio'/>
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+      <teaming type='persistent'/>
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+      <alias name='ua-backup1'/>
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+    </interface>
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+    <interface type='hostdev' managed='yes'>
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+      <mac address='00:11:22:33:44:55'/>
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+      <source>
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+        <address type='pci' domain='0x0000' bus='0x03' slot='0x07' function='0x1'/>
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+      </source>
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+      <teaming type='transient' persistent='ua-backup0'/>
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+    </interface>
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+    <interface type='hostdev' managed='yes'>
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+      <mac address='66:44:33:22:11:00'/>
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+      <source>
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+        <address type='pci' domain='0x0000' bus='0x03' slot='0x07' function='0x2'/>
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+      </source>
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+      <teaming type='transient' persistent='ua-backup1'/>
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+    </interface>
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+    <memballoon model='virtio'/>
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+  </devices>
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+</domain>
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diff --git a/tests/qemuxml2xmloutdata/net-virtio-teaming-network.xml b/tests/qemuxml2xmloutdata/net-virtio-teaming-network.xml
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new file mode 100644
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index 0000000000..e0dbeafe02
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--- /dev/null
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+++ b/tests/qemuxml2xmloutdata/net-virtio-teaming-network.xml
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@@ -0,0 +1,51 @@
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+<domain type='qemu'>
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+  <name>QEMUGuest1</name>
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+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
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+  <memory unit='KiB'>219100</memory>
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+  <currentMemory unit='KiB'>219100</currentMemory>
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+  <vcpu placement='static'>1</vcpu>
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+  <os>
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+    <type arch='i686' machine='pc'>hvm</type>
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+    <boot dev='hd'/>
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+  </os>
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+  <clock offset='utc'/>
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+  <on_poweroff>destroy</on_poweroff>
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+  <on_reboot>restart</on_reboot>
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+  <on_crash>destroy</on_crash>
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+  <devices>
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+    <emulator>/usr/bin/qemu-system-i386</emulator>
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+    <disk type='block' device='disk'>
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+      <driver name='qemu' type='raw'/>
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+      <source dev='/dev/HostVG/QEMUGuest1'/>
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+      <target dev='hda' bus='ide'/>
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+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
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+    </disk>
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+    <controller type='usb' index='0'>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
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+    </controller>
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+    <controller type='pci' index='0' model='pci-root'/>
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+    <controller type='ide' index='0'>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
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+    </controller>
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+    <interface type='network'>
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+      <mac address='00:11:22:33:44:55'/>
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+      <source network='mybridge'/>
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+      <model type='virtio'/>
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+      <teaming type='persistent'/>
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+      <alias name='ua-backup0'/>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
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+    </interface>
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+    <interface type='network'>
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+      <mac address='00:11:22:33:44:55'/>
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+      <source network='myhostdevpool'/>
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+      <model type='virtio'/>
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+      <teaming type='transient' persistent='ua-backup0'/>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
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+    </interface>
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+    <input type='mouse' bus='ps2'/>
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+    <input type='keyboard' bus='ps2'/>
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+    <memballoon model='virtio'>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
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+    </memballoon>
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+  </devices>
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+</domain>
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diff --git a/tests/qemuxml2xmloutdata/net-virtio-teaming.xml b/tests/qemuxml2xmloutdata/net-virtio-teaming.xml
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new file mode 100644
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index 0000000000..5a5695794a
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--- /dev/null
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+++ b/tests/qemuxml2xmloutdata/net-virtio-teaming.xml
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@@ -0,0 +1,66 @@
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+<domain type='qemu'>
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+  <name>QEMUGuest1</name>
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+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
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+  <memory unit='KiB'>219100</memory>
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+  <currentMemory unit='KiB'>219100</currentMemory>
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+  <vcpu placement='static'>1</vcpu>
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+  <os>
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+    <type arch='i686' machine='pc'>hvm</type>
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+    <boot dev='hd'/>
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+  </os>
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+  <clock offset='utc'/>
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+  <on_poweroff>destroy</on_poweroff>
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+  <on_reboot>restart</on_reboot>
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+  <on_crash>destroy</on_crash>
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+  <devices>
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+    <emulator>/usr/bin/qemu-system-i386</emulator>
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+    <disk type='block' device='disk'>
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+      <driver name='qemu' type='raw'/>
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+      <source dev='/dev/HostVG/QEMUGuest1'/>
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+      <target dev='hda' bus='ide'/>
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+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
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+    </disk>
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+    <controller type='usb' index='0'>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
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+    </controller>
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+    <controller type='pci' index='0' model='pci-root'/>
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+    <controller type='ide' index='0'>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
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+    </controller>
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+    <interface type='user'>
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+      <mac address='00:11:22:33:44:55'/>
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+      <model type='virtio'/>
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+      <teaming type='persistent'/>
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+      <alias name='ua-backup0'/>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
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+    </interface>
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+    <interface type='user'>
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+      <mac address='66:44:33:22:11:00'/>
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+      <model type='virtio'/>
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+      <teaming type='persistent'/>
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+      <alias name='ua-backup1'/>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
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+    </interface>
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+    <interface type='hostdev' managed='yes'>
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+      <mac address='00:11:22:33:44:55'/>
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+      <source>
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+        <address type='pci' domain='0x0000' bus='0x03' slot='0x07' function='0x1'/>
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+      </source>
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+      <teaming type='transient' persistent='ua-backup0'/>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
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+    </interface>
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+    <interface type='hostdev' managed='yes'>
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+      <mac address='66:44:33:22:11:00'/>
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+      <source>
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+        <address type='pci' domain='0x0000' bus='0x03' slot='0x07' function='0x2'/>
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+      </source>
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+      <teaming type='transient' persistent='ua-backup1'/>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
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+    </interface>
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+    <input type='mouse' bus='ps2'/>
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+    <input type='keyboard' bus='ps2'/>
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+    <memballoon model='virtio'>
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+      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
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+    </memballoon>
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+  </devices>
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+</domain>
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diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
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index 3cefc64833..e54c540ef6 100644
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--- a/tests/qemuxml2xmltest.c
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+++ b/tests/qemuxml2xmltest.c
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@@ -451,6 +451,12 @@ mymain(void)
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     DO_TEST("net-eth-unmanaged-tap", NONE);
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     DO_TEST("net-virtio-network-portgroup", NONE);
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     DO_TEST("net-virtio-rxtxqueuesize", NONE);
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+    DO_TEST("net-virtio-teaming",
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+            QEMU_CAPS_VIRTIO_NET_FAILOVER,
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+            QEMU_CAPS_DEVICE_VFIO_PCI);
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+    DO_TEST("net-virtio-teaming-network",
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+            QEMU_CAPS_VIRTIO_NET_FAILOVER,
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+            QEMU_CAPS_DEVICE_VFIO_PCI);
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     DO_TEST("net-hostdev", NONE);
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     DO_TEST("net-hostdev-bootorder", NONE);
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     DO_TEST("net-hostdev-vfio", QEMU_CAPS_DEVICE_VFIO_PCI);
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-- 
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2.25.0
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