libvirt/c6f1d519-rpc-simplify-dispatch.patch

commit c6f1d5190bbe62dae6b32081c0edd141ee19e82f
Author: Daniel P. Berrangé <berrange@redhat.com>
Date:   Tue Mar 6 16:44:34 2018 +0000

    rpc: simplify calling convention of virNetServerClientDispatchFunc
    
    Currently virNetServerClientDispatchFunc implementations are only
    responsible for free'ing the "msg" parameter upon success. Simplify the
    calling convention by making it their unconditional responsibility to
    free the "msg", and close the client if desired.
    
    Reviewed-by: John Ferlan <jferlan@redhat.com>
    Reviewed-by: Jim Fehlig <jfehlig@suse.com>
    Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

Index: libvirt-4.1.0/src/rpc/virnetserver.c
===================================================================
--- libvirt-4.1.0.orig/src/rpc/virnetserver.c
+++ libvirt-4.1.0/src/rpc/virnetserver.c
@@ -182,15 +182,14 @@ static void virNetServerHandleJob(void *
     VIR_FREE(job);
 }
 
-static int virNetServerDispatchNewMessage(virNetServerClientPtr client,
-                                          virNetMessagePtr msg,
-                                          void *opaque)
+static void virNetServerDispatchNewMessage(virNetServerClientPtr client,
+                                           virNetMessagePtr msg,
+                                           void *opaque)
 {
     virNetServerPtr srv = opaque;
     virNetServerProgramPtr prog = NULL;
     unsigned int priority = 0;
     size_t i;
-    int ret = -1;
 
     VIR_DEBUG("server=%p client=%p message=%p",
               srv, client, msg);
@@ -207,7 +206,7 @@ static int virNetServerDispatchNewMessag
         virNetServerJobPtr job;
 
         if (VIR_ALLOC(job) < 0)
-            goto cleanup;
+            goto error;
 
         job->client = client;
         job->msg = msg;
@@ -218,21 +217,24 @@ static int virNetServerDispatchNewMessag
         }
 
         virObjectRef(client);
-        ret = virThreadPoolSendJob(srv->workers, priority, job);
-
-        if (ret < 0) {
+        if (virThreadPoolSendJob(srv->workers, priority, job) < 0) {
             virObjectUnref(client);
             VIR_FREE(job);
             virObjectUnref(prog);
+            goto error;
         }
     } else {
-        ret = virNetServerProcessMsg(srv, client, prog, msg);
+        if (virNetServerProcessMsg(srv, client, prog, msg) < 0)
+            goto error;
     }
 
- cleanup:
     virObjectUnlock(srv);
+    return;
 
-    return ret;
+ error:
+    virNetMessageFree(msg);
+    virNetServerClientClose(client);
+    virObjectUnlock(srv);
 }
 
 /**
Index: libvirt-4.1.0/src/rpc/virnetserverclient.c
===================================================================
--- libvirt-4.1.0.orig/src/rpc/virnetserverclient.c
+++ libvirt-4.1.0/src/rpc/virnetserverclient.c
@@ -1315,11 +1315,11 @@ static void virNetServerClientDispatchRe
 
         /* Send off to for normal dispatch to workers */
         if (msg) {
-            if (!client->dispatchFunc ||
-                client->dispatchFunc(client, msg, client->dispatchOpaque) < 0) {
+            if (!client->dispatchFunc) {
                 virNetMessageFree(msg);
                 client->wantClose = true;
-                return;
+            } else {
+                client->dispatchFunc(client, msg, client->dispatchOpaque);
             }
         }
 
Index: libvirt-4.1.0/src/rpc/virnetserverclient.h
===================================================================
--- libvirt-4.1.0.orig/src/rpc/virnetserverclient.h
+++ libvirt-4.1.0/src/rpc/virnetserverclient.h
@@ -36,9 +36,12 @@ typedef virNetServer *virNetServerPtr;
 typedef struct _virNetServerClient virNetServerClient;
 typedef virNetServerClient *virNetServerClientPtr;
 
-typedef int (*virNetServerClientDispatchFunc)(virNetServerClientPtr client,
-                                              virNetMessagePtr msg,
-                                              void *opaque);
+/* This function owns the "msg" pointer it is passed and
+ * must arrange for virNetMessageFree to be called on it
+ */
+typedef void (*virNetServerClientDispatchFunc)(virNetServerClientPtr client,
+                                               virNetMessagePtr msg,
+                                               void *opaque);
 
 typedef int (*virNetServerClientFilterFunc)(virNetServerClientPtr client,
                                             virNetMessagePtr msg,