ch: events: facilitate lifecycle events handling

Implement `virCHProcessEvent` that maps event string to corresponding
event type and take appropriate actions. As part of this, handle the
shutdown event by correctly updating the domain state. This change also
facilitates the handling of other VM lifecycle events, such as booting,
rebooting, pause, resume, etc.

Signed-off-by: Purna Pavan Chandra Aekkaladevi <paekkaladevi@linux.microsoft.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

diff --git a/src/ch/ch_events.c b/src/ch/ch_events.c
index 5cc643c191393751086e48281f5d6058d7d79902..ba5b247c83081ceb50e3c79b1461b50478d298e1 100644 (file)
--- a/src/ch/ch_events.c
+++ b/src/ch/ch_events.c
@@ -28,6 +28,103 @@
 
 VIR_LOG_INIT("ch.ch_events");
 
+VIR_ENUM_IMPL(virCHEvent,
+              VIR_CH_EVENT_LAST,
+              "vmm:starting",
+              "vmm:shutdown",
+              "vm:booting",
+              "vm:booted",
+              "vm:rebooting",
+              "vm:rebooted",
+              "vm:shutdown",
+              "vm:deleted",
+              "vm:pausing",
+              "vm:paused",
+              "vm:resuming",
+              "vm:resumed",
+              "vm:snapshotting",
+              "vm:snapshotted",
+              "vm:restoring",
+              "vm:restored",
+);
+
+static int
+virCHEventStopProcess(virDomainObj *vm,
+                      virDomainShutoffReason reason)
+{
+    virCHDriver *driver =  ((virCHDomainObjPrivate *)vm->privateData)->driver;
+
+    virObjectLock(vm);
+    if (virDomainObjBeginJob(vm, VIR_JOB_MODIFY))
+        return -1;
+    virCHProcessStop(driver, vm, reason);
+    virDomainObjEndJob(vm);
+    virObjectUnlock(vm);
+
+    return 0;
+}
+
+static int
+virCHProcessEvent(virCHMonitor *mon,
+                  virJSONValue *eventJSON)
+{
+    const char *event;
+    const char *source;
+    virCHEvent ev;
+    g_autofree char *timestamp = NULL;
+    g_autofree char *full_event = NULL;
+    virDomainObj *vm = mon->vm;
+    int ret = 0;
+
+    if (virJSONValueObjectHasKey(eventJSON, "source") == 0) {
+        VIR_WARN("%s: Invalid JSON from monitor, no source key", vm->def->name);
+        return -1;
+    }
+    if (virJSONValueObjectHasKey(eventJSON, "event") == 0) {
+        VIR_WARN("%s: Invalid JSON from monitor, no event key", vm->def->name);
+        return -1;
+    }
+    source = virJSONValueObjectGetString(eventJSON, "source");
+    event = virJSONValueObjectGetString(eventJSON, "event");
+    full_event = g_strdup_printf("%s:%s", source, event);
+    ev = virCHEventTypeFromString(full_event);
+    VIR_DEBUG("%s: Source: %s, Event: %s, ev: %d", vm->def->name, source, event, ev);
+
+    switch (ev) {
+    case VIR_CH_EVENT_VMM_STARTING:
+    case VIR_CH_EVENT_VM_BOOTING:
+    case VIR_CH_EVENT_VM_BOOTED:
+    case VIR_CH_EVENT_VM_REBOOTING:
+    case VIR_CH_EVENT_VM_REBOOTED:
+    case VIR_CH_EVENT_VM_PAUSING:
+    case VIR_CH_EVENT_VM_PAUSED:
+    case VIR_CH_EVENT_VM_RESUMING:
+    case VIR_CH_EVENT_VM_RESUMED:
+    case VIR_CH_EVENT_VM_SNAPSHOTTING:
+    case VIR_CH_EVENT_VM_SNAPSHOTTED:
+    case VIR_CH_EVENT_VM_RESTORING:
+    case VIR_CH_EVENT_VM_RESTORED:
+    case VIR_CH_EVENT_VM_DELETED:
+        break;
+    case VIR_CH_EVENT_VMM_SHUTDOWN:
+        if (virCHEventStopProcess(vm, VIR_DOMAIN_SHUTOFF_SHUTDOWN)) {
+            VIR_WARN("Failed to mark the VM(%s) as SHUTDOWN!",
+                     vm->def->name);
+            ret = -1;
+        }
+        break;
+    case VIR_CH_EVENT_VM_SHUTDOWN:
+        virObjectLock(vm);
+        virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, VIR_DOMAIN_SHUTOFF_SHUTDOWN);
+        virObjectUnlock(vm);
+        break;
+    case VIR_CH_EVENT_LAST:
+    default:
+        VIR_WARN("%s: Unknown event: %s", vm->def->name, full_event);
+    }
+
+    return ret;
+}
 
 /**
  * virCHProcessEvents:
@@ -78,7 +175,11 @@ virCHProcessEvents(virCHMonitor *mon)
                 json_start = buf + start_index;
 
                 if ((obj = virJSONValueFromString(json_start))) {
-                    /* Process the event string (obj) here */
+                    if (virCHProcessEvent(mon, obj) < 0) {
+                        VIR_ERROR(_("%1$s: Failed to process JSON event doc: %2$s"),
+                                  vm->def->name, json_start);
+                        return -1;
+                    }
                     virJSONValueFree(obj);
                 } else {
                     VIR_ERROR(_("%1$s: Invalid JSON event doc: %2$s"),

diff --git a/src/ch/ch_events.h b/src/ch/ch_events.h
index 2e9cdf03bb333586bf11a976b5e6486a3d185766..3b360628f7de911459420e34096ca0523c652055 100644 (file)
--- a/src/ch/ch_events.h
+++ b/src/ch/ch_events.h
@@ -24,5 +24,31 @@
 
 #define CH_EVENT_BUFFER_SZ  PIPE_BUF
 
+typedef enum {
+    /* source: vmm */
+    VIR_CH_EVENT_VMM_STARTING = 0,
+    VIR_CH_EVENT_VMM_SHUTDOWN,
+
+    /* source: vm */
+    VIR_CH_EVENT_VM_BOOTING,
+    VIR_CH_EVENT_VM_BOOTED,
+    VIR_CH_EVENT_VM_REBOOTING,
+    VIR_CH_EVENT_VM_REBOOTED,
+    VIR_CH_EVENT_VM_SHUTDOWN,
+    VIR_CH_EVENT_VM_DELETED,
+    VIR_CH_EVENT_VM_PAUSING,
+    VIR_CH_EVENT_VM_PAUSED,
+    VIR_CH_EVENT_VM_RESUMING,
+    VIR_CH_EVENT_VM_RESUMED,
+    VIR_CH_EVENT_VM_SNAPSHOTTING,
+    VIR_CH_EVENT_VM_SNAPSHOTTED,
+    VIR_CH_EVENT_VM_RESTORING,
+    VIR_CH_EVENT_VM_RESTORED,
+
+    VIR_CH_EVENT_LAST
+} virCHEvent;
+
+VIR_ENUM_DECL(virCHEvent);
+
 int virCHStartEventHandler(virCHMonitor *mon);
 void virCHStopEventHandler(virCHMonitor *mon);