conf: domain: reject name containing '/'

Trying to define a domain name containing an embedded '/'
will immediately fail when trying to write the XML to disk for
our stateful drivers. This patch explicitly rejects names
containing a '/', and provides an xmlopt feature for drivers
to avoid this validation check, which is enabled in every
non-stateful driver that already has xmlopt handling wired up.

(Technically this could reject a previously accepted vmname like
 '/foo', however at least for the qemu driver that falls over
 later when starting qemu)

https://bugzilla.redhat.com/show_bug.cgi?id=639923

src/conf/domain_conf.c

@@ -4300,6 +4300,14 @@ virDomainDefPostParseCheckFeatures(virDomainDefPtr def,
     if (UNSUPPORTED(VIR_DOMAIN_DEF_FEATURE_OFFLINE_VCPUPIN))
         virDomainDefRemoveOfflineVcpuPin(def);
 
+    if (UNSUPPORTED(VIR_DOMAIN_DEF_FEATURE_NAME_SLASH)) {
+        if (def->name && strchr(def->name, '/')) {
+            virReportError(VIR_ERR_XML_ERROR,
+                           _("name %s cannot contain '/'"), def->name);
+            return -1;
+        }
+    }
+
     return 0;
 }
 

src/conf/domain_conf.h

@@ -2444,6 +2444,7 @@ typedef enum {
     VIR_DOMAIN_DEF_FEATURE_WIDE_SCSI = (1 << 0),
     VIR_DOMAIN_DEF_FEATURE_MEMORY_HOTPLUG = (1 << 1),
     VIR_DOMAIN_DEF_FEATURE_OFFLINE_VCPUPIN = (1 << 2),
+    VIR_DOMAIN_DEF_FEATURE_NAME_SLASH = (1 << 3),
 } virDomainDefFeatures;
 
 

src/openvz/openvz_driver.c

@@ -128,8 +128,9 @@ openvzDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
 
 
 virDomainDefParserConfig openvzDomainDefParserConfig = {
-        .domainPostParseCallback = openvzDomainDefPostParse,
-        .devicesPostParseCallback = openvzDomainDeviceDefPostParse,
+    .domainPostParseCallback = openvzDomainDefPostParse,
+    .devicesPostParseCallback = openvzDomainDeviceDefPostParse,
+    .features = VIR_DOMAIN_DEF_FEATURE_NAME_SLASH,
 };
 
 

src/phyp/phyp_driver.c

@@ -1117,6 +1117,7 @@ phypDomainDeviceDefPostParse(virDomainDeviceDefPtr dev ATTRIBUTE_UNUSED,
 virDomainDefParserConfig virPhypDriverDomainDefParserConfig = {
     .devicesPostParseCallback = phypDomainDeviceDefPostParse,
     .domainPostParseCallback = phypDomainDefPostParse,
+    .features = VIR_DOMAIN_DEF_FEATURE_NAME_SLASH,
 };
 
 

src/vbox/vbox_common.c

@@ -273,6 +273,7 @@ static virDomainDefParserConfig vboxDomainDefParserConfig = {
     .macPrefix = { 0x08, 0x00, 0x27 },
     .devicesPostParseCallback = vboxDomainDeviceDefPostParse,
     .domainPostParseCallback = vboxDomainDefPostParse,
+    .features = VIR_DOMAIN_DEF_FEATURE_NAME_SLASH,
 };
 
 static virDomainXMLOptionPtr

src/vmx/vmx.c

@@ -547,7 +547,8 @@ static virDomainDefParserConfig virVMXDomainDefParserConfig = {
     .macPrefix = {0x00, 0x0c, 0x29},
     .devicesPostParseCallback = virVMXDomainDevicesDefPostParse,
     .domainPostParseCallback = virVMXDomainDefPostParse,
-    .features = VIR_DOMAIN_DEF_FEATURE_WIDE_SCSI,
+    .features = (VIR_DOMAIN_DEF_FEATURE_WIDE_SCSI |
+                 VIR_DOMAIN_DEF_FEATURE_NAME_SLASH),
 };
 
 static void

src/xenapi/xenapi_driver.c

@@ -88,6 +88,7 @@ xenapiDomainDefPostParse(virDomainDefPtr def,
 virDomainDefParserConfig xenapiDomainDefParserConfig = {
     .devicesPostParseCallback = xenapiDomainDeviceDefPostParse,
     .domainPostParseCallback = xenapiDomainDefPostParse,
+    .features = VIR_DOMAIN_DEF_FEATURE_NAME_SLASH,
 };
 
 

tests/genericxml2xmlindata/generic-name-slash-fail.xml

+<domain type='qemu'>
+  <name>foo/bar</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+  </devices>
+</domain>

tests/genericxml2xmltest.c

@@ -81,6 +81,9 @@ mymain(void)
     DO_TEST_FULL("graphics-listen-back-compat-mismatch", 0, false,
         TEST_COMPARE_DOM_XML2XML_RESULT_FAIL_PARSE);
 
+    DO_TEST_FULL("name-slash-parse", 0, false,
+        TEST_COMPARE_DOM_XML2XML_RESULT_FAIL_PARSE);
+
     virObjectUnref(caps);
     virObjectUnref(xmlopt);