File c363f03e-virnetdaemon-intro-virNetDaemonQuitExecRestart.patch of Package libvirt.20358

commit c363f03e6d0298416179c7f7b24f00da9d85a14f
Author: Peter Krempa <pkrempa@redhat.com>
Date:   Wed Mar 10 17:01:23 2021 +0100

    virnetdaemon: Introduce virNetDaemonQuitExecRestart
    
    Recent changes which meant to fix daemon shutdown broke the exec-restart
    capability of virtlogd and virtlockd, since the code actually closed all
    the sockets and shut down all the internals.
    
    Add virNetDaemonQuitExecRestart, which requests a shutdown of the
    process, but keeps all the services open and registered since they are
    preserved across the restart.
    
    Signed-off-by: Peter Krempa <pkrempa@redhat.com>
    Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

Index: libvirt-7.1.0/src/libvirt_remote.syms
===================================================================
--- libvirt-7.1.0.orig/src/libvirt_remote.syms
+++ libvirt-7.1.0/src/libvirt_remote.syms
@@ -85,6 +85,7 @@ virNetDaemonNew;
 virNetDaemonNewPostExecRestart;
 virNetDaemonPreExecRestart;
 virNetDaemonQuit;
+virNetDaemonQuitExecRestart;
 virNetDaemonRemoveShutdownInhibition;
 virNetDaemonRun;
 virNetDaemonSetShutdownCallbacks;
Index: libvirt-7.1.0/src/rpc/virnetdaemon.c
===================================================================
--- libvirt-7.1.0.orig/src/rpc/virnetdaemon.c
+++ libvirt-7.1.0/src/rpc/virnetdaemon.c
@@ -76,6 +76,7 @@ struct _virNetDaemon {
     bool quit;
     bool finished;
     bool graceful;
+    bool execRestart;
 
     unsigned int autoShutdownTimeout;
     size_t autoShutdownInhibitions;
@@ -857,6 +858,10 @@ virNetDaemonRun(virNetDaemonPtr dmn)
 
         virHashForEach(dmn->servers, daemonServerProcessClients, NULL);
 
+        /* don't shutdown services when performing an exec-restart */
+        if (dmn->quit && dmn->execRestart)
+            goto cleanup;
+
         if (dmn->quit && dmn->finishTimer == -1) {
             virHashForEach(dmn->servers, daemonServerClose, NULL);
             if (dmn->shutdownPrepareCb && dmn->shutdownPrepareCb() < 0)
@@ -912,6 +917,20 @@ virNetDaemonQuit(virNetDaemonPtr dmn)
     virObjectUnlock(dmn);
 }
 
+
+void
+virNetDaemonQuitExecRestart(virNetDaemon *dmn)
+{
+    virObjectLock(dmn);
+
+    VIR_DEBUG("Exec-restart requested %p", dmn);
+    dmn->quit = true;
+    dmn->execRestart = true;
+
+    virObjectUnlock(dmn);
+}
+
+
 static int
 daemonServerClose(void *payload,
                   const char *key G_GNUC_UNUSED,
Index: libvirt-7.1.0/src/rpc/virnetdaemon.h
===================================================================
--- libvirt-7.1.0.orig/src/rpc/virnetdaemon.h
+++ libvirt-7.1.0/src/rpc/virnetdaemon.h
@@ -75,6 +75,7 @@ void virNetDaemonSetStateStopWorkerThrea
 void virNetDaemonRun(virNetDaemonPtr dmn);
 
 void virNetDaemonQuit(virNetDaemonPtr dmn);
+void virNetDaemonQuitExecRestart(virNetDaemon *dmn);
 
 bool virNetDaemonHasClients(virNetDaemonPtr dmn);