qemu: Emit the guest agent lifecycle event

Add code to emit the event on change of the channel state and reconnect
to the qemu process.

src/qemu/qemu_driver.c

@@ -4342,6 +4342,7 @@ processSerialChangedEvent(virQEMUDriverPtr driver,
 {
     virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
     virDomainChrDeviceState newstate;
+    virObjectEventPtr event = NULL;
     virDomainDeviceDef dev;
 
     if (connected)
@@ -4369,6 +4370,11 @@ processSerialChangedEvent(virQEMUDriverPtr driver,
         dev.data.chr->targetType != VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO)
         goto endjob;
 
+    if (STREQ_NULLABLE(dev.data.chr->target.name, "org.qemu.guest_agent.0") &&
+        (event = virDomainEventAgentLifecycleNewFromObj(vm, newstate,
+                                                        VIR_CONNECT_DOMAIN_EVENT_AGENT_LIFECYCLE_REASON_CHANNEL)))
+        qemuDomainEventQueue(driver, event);
+
     dev.data.chr->state = newstate;
 
     if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)

src/qemu/qemu_process.c

@@ -2069,13 +2069,20 @@ qemuProcessFindCharDevicePTYs(virDomainObjPtr vm,
 
 
 static int
-qemuProcessRefreshChannelVirtioState(virDomainObjPtr vm,
-                                     virHashTablePtr info)
+qemuProcessRefreshChannelVirtioState(virQEMUDriverPtr driver,
+                                     virDomainObjPtr vm,
+                                     virHashTablePtr info,
+                                     int booted)
 {
     size_t i;
+    int agentReason = VIR_CONNECT_DOMAIN_EVENT_AGENT_LIFECYCLE_REASON_CHANNEL;
     qemuMonitorChardevInfoPtr entry;
+    virObjectEventPtr event = NULL;
     char id[32];
 
+    if (booted)
+        agentReason = VIR_CONNECT_DOMAIN_EVENT_AGENT_LIFECYCLE_REASON_DOMAIN_STARTED;
+
     for (i = 0; i < vm->def->nchannels; i++) {
         virDomainChrDefPtr chr = vm->def->channels[i];
         if (chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO) {
@@ -2092,6 +2099,12 @@ qemuProcessRefreshChannelVirtioState(virDomainObjPtr vm,
                 !entry->state)
                 continue;
 
+            if (entry->state != VIR_DOMAIN_CHR_DEVICE_STATE_DEFAULT &&
+                STREQ_NULLABLE(chr->target.name, "org.qemu.guest_agent.0") &&
+                (event = virDomainEventAgentLifecycleNewFromObj(vm, entry->state,
+                                                                agentReason)))
+                qemuDomainEventQueue(driver, event);
+
             chr->state = entry->state;
         }
     }
@@ -2115,7 +2128,7 @@ qemuProcessReconnectRefreshChannelVirtioState(virQEMUDriverPtr driver,
     if (ret < 0)
         goto cleanup;
 
-    ret = qemuProcessRefreshChannelVirtioState(vm, info);
+    ret = qemuProcessRefreshChannelVirtioState(driver, vm, info, false);
 
  cleanup:
     virHashFree(info);
@@ -2171,7 +2184,8 @@ qemuProcessWaitForMonitor(virQEMUDriverPtr driver,
                                                         info)) < 0)
             goto cleanup;
 
-        if ((ret = qemuProcessRefreshChannelVirtioState(vm, info)) < 0)
+        if ((ret = qemuProcessRefreshChannelVirtioState(driver, vm, info,
+                                                        true)) < 0)
             goto cleanup;
     }