interface: Use virInterfaceDefPtr rather than deref from virInterfaceObjPtr

We're about to make the obj much more private, so make it easier to
see future changes which will require accessors for the obj->def

This also includes modifying some interfaces->objs[i]->X references to be
obj = interfaces->objs[i]; and then def = obj->def

Signed-off-by: John Ferlan <jferlan@redhat.com>

src/conf/virinterfaceobj.c

@@ -72,18 +72,21 @@ virInterfaceObjFindByMACString(virInterfaceObjListPtr interfaces,
     unsigned int matchct = 0;
 
     for (i = 0; i < interfaces->count; i++) {
+        virInterfaceObjPtr obj = interfaces->objs[i];
+        virInterfaceDefPtr def;
 
-        virInterfaceObjLock(interfaces->objs[i]);
+        virInterfaceObjLock(obj);
-        if (STRCASEEQ(interfaces->objs[i]->def->mac, mac)) {
+        def = obj->def;
+        if (STRCASEEQ(def->mac, mac)) {
             matchct++;
             if (matchct <= maxmatches) {
-                matches[matchct - 1] = interfaces->objs[i];
+                matches[matchct - 1] = obj;
                 /* keep the lock if we're returning object to caller */
                 /* it is the caller's responsibility to unlock *all* matches */
                 continue;
             }
         }
-        virInterfaceObjUnlock(interfaces->objs[i]);
+        virInterfaceObjUnlock(obj);
 
     }
     return matchct;
@@ -97,10 +100,14 @@ virInterfaceObjFindByName(virInterfaceObjListPtr interfaces,
     size_t i;
 
     for (i = 0; i < interfaces->count; i++) {
-        virInterfaceObjLock(interfaces->objs[i]);
+        virInterfaceObjPtr obj = interfaces->objs[i];
-        if (STREQ(interfaces->objs[i]->def->name, name))
+        virInterfaceDefPtr def;
-            return interfaces->objs[i];
+
-        virInterfaceObjUnlock(interfaces->objs[i]);
+        virInterfaceObjLock(obj);
+        def = obj->def;
+        if (STREQ(def->name, name))
+            return obj;
+        virInterfaceObjUnlock(obj);
     }
 
     return NULL;
@@ -134,10 +141,10 @@ virInterfaceObjListClone(virInterfaceObjListPtr src,
     virInterfaceObjListFree(dest); /* start with an empty list */
     cnt = src->count;
     for (i = 0; i < cnt; i++) {
-        virInterfaceDefPtr def = src->objs[i]->def;
+        virInterfaceObjPtr srcobj = src->objs[i];
         virInterfaceDefPtr backup;
         virInterfaceObjPtr obj;
-        char *xml = virInterfaceDefFormat(def);
+        char *xml = virInterfaceDefFormat(srcobj->def);
 
         if (!xml)
             goto cleanup;
@@ -247,9 +254,12 @@ virInterfaceObjGetNames(virInterfaceObjListPtr interfaces,
 
     for (i = 0; i < interfaces->count && nnames < maxnames; i++) {
         virInterfaceObjPtr obj = interfaces->objs[i];
+        virInterfaceDefPtr def;
+
         virInterfaceObjLock(obj);
+        def = obj->def;
         if (wantActive == virInterfaceObjIsActive(obj)) {
-            if (VIR_STRDUP(names[nnames], obj->def->name) < 0) {
+            if (VIR_STRDUP(names[nnames], def->name) < 0) {
                 virInterfaceObjUnlock(obj);
                 goto failure;
             }

src/test/test_driver.c

@@ -3706,12 +3706,14 @@ testInterfaceLookupByName(virConnectPtr conn,
 {
     testDriverPtr privconn = conn->privateData;
     virInterfaceObjPtr obj;
+    virInterfaceDefPtr def;
     virInterfacePtr ret = NULL;
 
     if (!(obj = testInterfaceObjFindByName(privconn, name)))
         return NULL;
+    def = obj->def;
 
-    ret = virGetInterface(conn, obj->def->name, obj->def->mac);
+    ret = virGetInterface(conn, def->name, def->mac);
 
     virInterfaceObjUnlock(obj);
     return ret;
@@ -3724,6 +3726,7 @@ testInterfaceLookupByMACString(virConnectPtr conn,
 {
     testDriverPtr privconn = conn->privateData;
     virInterfaceObjPtr obj;
+    virInterfaceDefPtr def;
     int ifacect;
     virInterfacePtr ret = NULL;
 
@@ -3741,7 +3744,8 @@ testInterfaceLookupByMACString(virConnectPtr conn,
         goto cleanup;
     }
 
-    ret = virGetInterface(conn, obj->def->name, obj->def->mac);
+    def = obj->def;
+    ret = virGetInterface(conn, def->name, def->mac);
 
  cleanup:
     if (obj)
@@ -3888,6 +3892,7 @@ testInterfaceDefineXML(virConnectPtr conn,
     testDriverPtr privconn = conn->privateData;
     virInterfaceDefPtr def;
     virInterfaceObjPtr obj = NULL;
+    virInterfaceDefPtr objdef;
     virInterfacePtr ret = NULL;
 
     virCheckFlags(0, NULL);
@@ -3899,8 +3904,9 @@ testInterfaceDefineXML(virConnectPtr conn,
     if ((obj = virInterfaceObjAssignDef(&privconn->ifaces, def)) == NULL)
         goto cleanup;
     def = NULL;
+    objdef = obj->def;
 
-    ret = virGetInterface(conn, obj->def->name, obj->def->mac);
+    ret = virGetInterface(conn, objdef->name, objdef->mac);
 
  cleanup:
     virInterfaceDefFree(def);