Network duplicate UUID/name checking

The network driver is not doing correct checking for
duplicate UUID/name values. This introduces a new method
virNetworkObjIsDuplicate, based on the previously
written virDomainObjIsDuplicate.

* src/conf/network_conf.c, src/conf/network_conf.c,
  src/libvirt_private.syms: Add virNetworkObjIsDuplicate,
* src/network/bridge_driver.c: Call virNetworkObjIsDuplicate
  for checking uniqueness of uuid/names

src/conf/network_conf.c

@@ -940,6 +940,71 @@ error:
     return ret;
 }
 
+
+/*
+ * virNetworkObjIsDuplicate:
+ * @doms : virNetworkObjListPtr to search
+ * @def  : virNetworkDefPtr definition of network to lookup
+ * @check_active: If true, ensure that network is not active
+ *
+ * Returns: -1 on error
+ *          0 if network is new
+ *          1 if network is a duplicate
+ */
+int
+virNetworkObjIsDuplicate(virNetworkObjListPtr doms,
+                         virNetworkDefPtr def,
+                         unsigned int check_active)
+{
+    int ret = -1;
+    int dupVM = 0;
+    virNetworkObjPtr vm = NULL;
+
+    /* See if a VM with matching UUID already exists */
+    vm = virNetworkFindByUUID(doms, def->uuid);
+    if (vm) {
+        /* UUID matches, but if names don't match, refuse it */
+        if (STRNEQ(vm->def->name, def->name)) {
+            char uuidstr[VIR_UUID_STRING_BUFLEN];
+            virUUIDFormat(vm->def->uuid, uuidstr);
+            virNetworkReportError(VIR_ERR_OPERATION_FAILED,
+                                  _("network '%s' is already defined with uuid %s"),
+                                  vm->def->name, uuidstr);
+            goto cleanup;
+        }
+
+        if (check_active) {
+            /* UUID & name match, but if VM is already active, refuse it */
+            if (virNetworkObjIsActive(vm)) {
+                virNetworkReportError(VIR_ERR_OPERATION_INVALID,
+                                      _("network is already active as '%s'"),
+                                      vm->def->name);
+                goto cleanup;
+            }
+        }
+
+        dupVM = 1;
+    } else {
+        /* UUID does not match, but if a name matches, refuse it */
+        vm = virNetworkFindByName(doms, def->name);
+        if (vm) {
+            char uuidstr[VIR_UUID_STRING_BUFLEN];
+            virUUIDFormat(vm->def->uuid, uuidstr);
+            virNetworkReportError(VIR_ERR_OPERATION_FAILED,
+                                  _("network '%s' already exists with uuid %s"),
+                                  def->name, uuidstr);
+            goto cleanup;
+        }
+    }
+
+    ret = dupVM;
+cleanup:
+    if (vm)
+        virNetworkObjUnlock(vm);
+    return ret;
+}
+
+
 void virNetworkObjLock(virNetworkObjPtr obj)
 {
     virMutexLock(&obj->lock);

src/conf/network_conf.h

@@ -169,6 +169,10 @@ int virNetworkSetBridgeName(const virNetworkObjListPtr nets,
                             virNetworkDefPtr def,
                             int check_collision);
 
+int virNetworkObjIsDuplicate(virNetworkObjListPtr doms,
+                             virNetworkDefPtr def,
+                             unsigned int check_active);
+
 void virNetworkObjLock(virNetworkObjPtr obj);
 void virNetworkObjUnlock(virNetworkObjPtr obj);
 

src/libvirt_private.syms

@@ -469,6 +469,7 @@ virNetworkSaveConfig;
 virNetworkSetBridgeName;
 virNetworkObjLock;
 virNetworkObjUnlock;
+virNetworkObjIsDuplicate;
 
 
 # nodeinfo.h

src/network/bridge_driver.c

@@ -1378,6 +1378,9 @@ static virNetworkPtr networkCreate(virConnectPtr conn, const char *xml) {
     if (!(def = virNetworkDefParseString(xml)))
         goto cleanup;
 
+    if (virNetworkObjIsDuplicate(&driver->networks, def, 1) < 0)
+        goto cleanup;
+
     if (virNetworkSetBridgeName(&driver->networks, def, 1))
         goto cleanup;
 
@@ -1408,12 +1411,16 @@ static virNetworkPtr networkDefine(virConnectPtr conn, const char *xml) {
     virNetworkDefPtr def;
     virNetworkObjPtr network = NULL;
     virNetworkPtr ret = NULL;
+    int dupNet;
 
     networkDriverLock(driver);
 
     if (!(def = virNetworkDefParseString(xml)))
         goto cleanup;
 
+    if ((dupNet = virNetworkObjIsDuplicate(&driver->networks, def, 0)) < 0)
+        goto cleanup;
+
     if (virNetworkSetBridgeName(&driver->networks, def, 1))
         goto cleanup;