network: change default of forwardPlainNames to 'yes'

The previous patch fixed "forwardPlainNames" so that it really is
doing only what is intended, but left the default to be
"forwardPlainNames='no'". Discussion around the initial version of
that patch led to the decision that the default should instead be
"forwardPlainNames='yes'" (i.e. the original behavior before commit
f3886825). This patch makes that change to the default.

src/conf/network_conf.c

 /*
  * network_conf.c: network XML handling
  *
- * Copyright (C) 2006-2013 Red Hat, Inc.
+ * Copyright (C) 2006-2014 Red Hat, Inc.
  * Copyright (C) 2006-2008 Daniel P. Berrange
  *
  * This library is free software; you can redistribute it and/or
@@ -66,6 +66,12 @@ VIR_ENUM_IMPL(virNetworkForwardDriverName,
               "kvm",
               "vfio")
 
+VIR_ENUM_IMPL(virNetworkDNSForwardPlainNames,
+              VIR_NETWORK_DNS_FORWARD_PLAIN_NAMES_LAST,
+              "default",
+              "yes",
+              "no")
+
 virNetworkObjPtr virNetworkFindByUUID(virNetworkObjListPtr nets,
                                       const unsigned char *uuid)
 {
@@ -1053,9 +1059,9 @@ virNetworkDNSDefParseXML(const char *networkName,
 
     forwardPlainNames = virXPathString("string(./@forwardPlainNames)", ctxt);
     if (forwardPlainNames) {
-        if (STREQ(forwardPlainNames, "yes")) {
-            def->forwardPlainNames = true;
-        } else if (STRNEQ(forwardPlainNames, "no")) {
+        def->forwardPlainNames
+            = virNetworkDNSForwardPlainNamesTypeFromString(forwardPlainNames);
+        if (def->forwardPlainNames <= 0) {
             virReportError(VIR_ERR_XML_ERROR,
                            _("Invalid dns forwardPlainNames setting '%s' "
                              "in network '%s'"),
@@ -2295,19 +2301,26 @@ static int
 virNetworkDNSDefFormat(virBufferPtr buf,
                        const virNetworkDNSDef *def)
 {
-    int result = 0;
     size_t i, j;
 
     if (!(def->forwardPlainNames || def->forwarders || def->nhosts ||
           def->nsrvs || def->ntxts))
-        goto out;
+        return 0;
 
     virBufferAddLit(buf, "<dns");
     if (def->forwardPlainNames) {
-        virBufferAddLit(buf, " forwardPlainNames='yes'");
+        const char *fwd = virNetworkDNSForwardPlainNamesTypeToString(def->forwardPlainNames);
+
+        if (!fwd) {
+            virReportError(VIR_ERR_INTERNAL_ERROR,
+                           _("Unknown forwardPlainNames type %d in network"),
+                           def->forwardPlainNames);
+            return -1;
+        }
+        virBufferAsprintf(buf, " forwardPlainNames='%s'", fwd);
         if (!(def->forwarders || def->nhosts || def->nsrvs || def->ntxts)) {
             virBufferAddLit(buf, "/>\n");
-            goto out;
+            return 0;
         }
     }
 
@@ -2363,8 +2376,7 @@ virNetworkDNSDefFormat(virBufferPtr buf,
     }
     virBufferAdjustIndent(buf, -2);
     virBufferAddLit(buf, "</dns>\n");
-out:
-    return result;
+    return 0;
 }
 
 static int

src/conf/network_conf.h

 /*
  * network_conf.h: network XML handling
  *
- * Copyright (C) 2006-2013 Red Hat, Inc.
+ * Copyright (C) 2006-2014 Red Hat, Inc.
  * Copyright (C) 2006-2008 Daniel P. Berrange
  *
  * This library is free software; you can redistribute it and/or
@@ -112,10 +112,23 @@ struct _virNetworkDNSHostDef {
     char **names;
 };
 
+/* If forwardPlainNames is 0 (default), that is equivalent to "yes",
+ * but won't be encoded in newly formatted XML.
+ */
+typedef enum {
+    VIR_NETWORK_DNS_FORWARD_PLAIN_NAMES_DEFAULT = 0, /* silent "yes" */
+    VIR_NETWORK_DNS_FORWARD_PLAIN_NAMES_YES,
+    VIR_NETWORK_DNS_FORWARD_PLAIN_NAMES_NO,
+
+    VIR_NETWORK_DNS_FORWARD_PLAIN_NAMES_LAST,
+} virNetworkDNSForwardPlainNamesType;
+
+VIR_ENUM_DECL(virNetworkDNSForwardPlainNames)
+
 typedef struct _virNetworkDNSDef virNetworkDNSDef;
 typedef virNetworkDNSDef *virNetworkDNSDefPtr;
 struct _virNetworkDNSDef {
-    bool forwardPlainNames;
+    int forwardPlainNames; /* enum virNetworkDNSForwardPlainNamesType */
     size_t ntxts;
     virNetworkDNSTxtDefPtr txts;
     size_t nhosts;

src/network/bridge_driver.c

@@ -725,7 +725,8 @@ networkDnsmasqConfContents(virNetworkObjPtr network,
                           network->def->domain);
     }
 
-    if (!network->def->dns.forwardPlainNames) {
+    if (network->def->dns.forwardPlainNames
+        == VIR_NETWORK_DNS_FORWARD_PLAIN_NAMES_NO) {
         virBufferAddLit(&configbuf, "domain-needed\n");
         /* need to specify local=// whether or not a domain is
          * specified, unless the config says we should forward "plain"

tests/networkxml2confdata/dhcp6-nat-network.conf

@@ -5,8 +5,6 @@
 ##
 ## dnsmasq conf file created by libvirt
 strict-order
-domain-needed
-local=//
 except-interface=lo
 bind-dynamic
 interface=virbr0

tests/networkxml2confdata/dhcp6-network.conf

@@ -7,8 +7,6 @@
 strict-order
 domain=mynet
 expand-hosts
-domain-needed
-local=//
 except-interface=lo
 bind-dynamic
 interface=virbr0

tests/networkxml2confdata/dhcp6host-routed-network.conf

@@ -5,8 +5,6 @@
 ##
 ## dnsmasq conf file created by libvirt
 strict-order
-domain-needed
-local=//
 except-interface=lo
 bind-dynamic
 interface=virbr1

tests/networkxml2confdata/isolated-network.conf

@@ -5,8 +5,6 @@
 ##
 ## dnsmasq conf file created by libvirt
 strict-order
-domain-needed
-local=//
 except-interface=lo
 bind-interfaces
 listen-address=192.168.152.1

tests/networkxml2confdata/nat-network-dns-forwarders.conf

@@ -8,8 +8,6 @@ strict-order
 no-resolv
 server=8.8.8.8
 server=8.8.4.4
-domain-needed
-local=//
 except-interface=lo
 bind-dynamic
 interface=virbr0

tests/networkxml2confdata/nat-network-dns-srv-record-minimal.conf

@@ -5,8 +5,6 @@
 ##
 ## dnsmasq conf file created by libvirt
 strict-order
-domain-needed
-local=//
 except-interface=lo
 bind-interfaces
 listen-address=192.168.122.1

tests/networkxml2confdata/nat-network-dns-srv-record.conf

@@ -5,8 +5,6 @@
 ##
 ## dnsmasq conf file created by libvirt
 strict-order
-domain-needed
-local=//
 except-interface=lo
 bind-dynamic
 interface=virbr0

tests/networkxml2confdata/nat-network-dns-txt-record.conf

@@ -5,8 +5,6 @@
 ##
 ## dnsmasq conf file created by libvirt
 strict-order
-domain-needed
-local=//
 except-interface=lo
 bind-dynamic
 interface=virbr0

tests/networkxml2confdata/nat-network.conf

@@ -5,8 +5,6 @@
 ##
 ## dnsmasq conf file created by libvirt
 strict-order
-domain-needed
-local=//
 except-interface=lo
 bind-dynamic
 interface=virbr0

tests/networkxml2confdata/netboot-network.conf

@@ -7,8 +7,6 @@
 strict-order
 domain=example.com
 expand-hosts
-domain-needed
-local=//
 except-interface=lo
 bind-interfaces
 listen-address=192.168.122.1

tests/networkxml2confdata/netboot-proxy-network.conf

@@ -7,8 +7,6 @@
 strict-order
 domain=example.com
 expand-hosts
-domain-needed
-local=//
 except-interface=lo
 bind-interfaces
 listen-address=192.168.122.1

tests/networkxml2confdata/routed-network.conf

@@ -5,8 +5,6 @@
 ##
 ## dnsmasq conf file created by libvirt
 strict-order
-domain-needed
-local=//
 except-interface=lo
 bind-dynamic
 interface=virbr1

tests/networkxml2xmlout/nat-network-dns-hosts.xml

@@ -5,7 +5,7 @@
     <interface dev='eth0'/>
   </forward>
   <bridge name='virbr0' stp='on' delay='0'/>
-  <dns>
+  <dns forwardPlainNames='no'>
     <host ip='192.168.122.1'>
       <hostname>host</hostname>
       <hostname>gateway</hostname>

tests/networkxml2xmlupdateout/nat-network-dns-more-hosts.xml

@@ -5,7 +5,7 @@
     <interface dev='eth0'/>
   </forward>
   <bridge name='virbr0' stp='on' delay='0'/>
-  <dns>
+  <dns forwardPlainNames='no'>
     <host ip='f0:d::f0:d'>
       <hostname>pudding</hostname>
     </host>

tests/networkxml2xmlupdateout/nat-network-no-hosts.xml

@@ -5,6 +5,7 @@
     <interface dev='eth0'/>
   </forward>
   <bridge name='virbr0' stp='on' delay='0'/>
+  <dns forwardPlainNames='no'/>
   <ip address='192.168.122.1' netmask='255.255.255.0'>
   </ip>
 </network>