[libvirt PATCH v3 4/8] virsh: Added Methods to print metadata changes

[K Shiva <shiva_kr@xxxxxxxxxx>]

Signed-off-by: K Shiva <shiva_kr@xxxxxxxxxx>
---
 tools/virsh-network.c | 78 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 77 insertions(+), 1 deletion(-)

diff --git a/tools/virsh-network.c b/tools/virsh-network.c
index 42b7dba761..74712e29be 100644
--- a/tools/virsh-network.c
+++ b/tools/virsh-network.c
@@ -1206,7 +1206,8 @@ typedef struct virshNetEventData virshNetEventData;
 VIR_ENUM_DECL(virshNetworkEventId);
 VIR_ENUM_IMPL(virshNetworkEventId,
               VIR_NETWORK_EVENT_ID_LAST,
-              "lifecycle");
+              "lifecycle",
+              "metadata-change");
 
 static void
 vshEventLifecyclePrint(virConnectPtr conn G_GNUC_UNUSED,
@@ -1239,9 +1240,84 @@ vshEventLifecyclePrint(virConnectPtr conn G_GNUC_UNUSED,
         vshEventDone(data->ctl);
 }
 
+static void G_GNUC_PRINTF(2, 3)
+virshEventPrintf(virshNetEventData *data,
+                 const char *fmt,
+                 ...)
+{
+    va_list ap;
+
+    if (!data->loop && data->count)
+        return;
+
+    if (data->timestamp) {
+        char timestamp[VIR_TIME_STRING_BUFLEN] = "";
+
+        ignore_value(virTimeStringNowRaw(timestamp));
+        vshPrint(data->ctl, "%s: ", timestamp);
+    }
+
+    va_start(ap, fmt);
+    vshPrintVa(data->ctl, fmt, ap);
+    va_end(ap);
+
+    (data->count)++;
+    if (!data->loop)
+        vshEventDone(data->ctl);
+}
+
+/**
+ * virshEventPrint:
+ *
+ * @data: opaque data passed to all event callbacks
+ * @buf: string buffer describing the event
+ *
+ * Print the event description found in @buf and update virshNetEventData.
+ *
+ * This function resets @buf and frees all memory consumed by its content.
+ */
+static void
+virshEventPrint(virshNetEventData *data,
+                virBuffer *buf)
+{
+    g_autofree char *msg = NULL;
+
+    if (!(msg = virBufferContentAndReset(buf)))
+        return;
+
+    virshEventPrintf(data, "%s", msg);
+}
+
+#define UNKNOWNSTR(str) (str ? str : N_("unsupported value"))
+
+VIR_ENUM_DECL(virshNetworkEventMetadataChangeType);
+VIR_ENUM_IMPL(virshNetworkEventMetadataChangeType,
+              VIR_NETWORK_METADATA_LAST,
+              N_("description"),
+              N_("title"),
+              N_("element"));
+
+static void
+vshEventMetadataChangePrint(virConnectPtr conn G_GNUC_UNUSED,
+                              virNetworkPtr net,
+                              int type,
+                              const char *nsuri,
+                              void *opaque)
+{
+    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
+
+    virBufferAsprintf(&buf, _("event 'metadata-change' for network '%1$s': type %2$s, uri %3$s\n"),
+                      virNetworkGetName(net),
+                      UNKNOWNSTR(virshNetworkEventMetadataChangeTypeTypeToString(type)),
+                      NULLSTR(nsuri));
+    virshEventPrint(opaque, &buf);
+}
+
 virshNetworkEventCallback virshNetworkEventCallbacks[] = {
     { "lifecycle",
       VIR_NETWORK_EVENT_CALLBACK(vshEventLifecyclePrint), },
+    { "metadata-change",
+      VIR_NETWORK_EVENT_CALLBACK(vshEventMetadataChangePrint), },
 };
 G_STATIC_ASSERT(VIR_NETWORK_EVENT_ID_LAST == G_N_ELEMENTS(virshNetworkEventCallbacks));
 
-- 
2.41.0