net: Introduce announce timer

The 'announce timer' will be used by migration, and explicit
requests for qemu to perform network announces.

Based on the work by Germano Veit Michel <germano@redhat.com>
 and Vlad Yasevich <vyasevic@redhat.com>

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

2 files changed, 40 insertions, 0 deletions

diff --git a/include/net/announce.h b/include/net/announce.h
new file mode 100644
index 0000000000..b89f1c28b5
--- /dev/null
+++ b/include/net/announce.h
@@ -0,0 +1,39 @@
+/*
+ *  Self-announce facility
+ *  (c) 2017-2019 Red Hat, Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef QEMU_NET_ANNOUNCE_H
+#define QEMU_NET_ANNOUNCE_H
+
+#include "qemu-common.h"
+#include "qapi/qapi-types-net.h"
+#include "qemu/timer.h"
+
+struct AnnounceTimer {
+    QEMUTimer *tm;
+    AnnounceParameters params;
+    QEMUClockType type;
+    int round;
+};
+
+/* Returns: update the timer to the next time point */
+int64_t qemu_announce_timer_step(AnnounceTimer *timer);
+
+/* Delete the underlying timer */
+void qemu_announce_timer_del(AnnounceTimer *timer);
+
+/*
+ * Under BQL/main thread
+ * Reset the timer to the given parameters/type/notifier.
+ */
+void qemu_announce_timer_reset(AnnounceTimer *timer,
+                               AnnounceParameters *params,
+                               QEMUClockType type,
+                               QEMUTimerCB *cb,
+                               void *opaque);
+
+#endif
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index 5d1a2d8329..e4a0a656d1 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -8,6 +8,7 @@
 typedef struct AdapterInfo AdapterInfo;
 typedef struct AddressSpace AddressSpace;
 typedef struct AioContext AioContext;
+typedef struct AnnounceTimer AnnounceTimer;
 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap;
 typedef struct BdrvDirtyBitmapIter BdrvDirtyBitmapIter;
 typedef struct BlockBackend BlockBackend;