[Qemu-devel] [PATCH v2 1/2] net: introduce MAC_TABLE_CHANGED event

[Amos Kong <akong@redhat.com>]

Introduce this new QMP event to notify management after guest changes
mac-table configuration.

Signed-off-by: Amos Kong <akong@redhat.com>
---
 QMP/qmp-events.txt        | 14 ++++++++++++++
 hw/net/virtio-net.c       | 12 ++++++++++++
 include/monitor/monitor.h |  1 +
 monitor.c                 |  1 +
 4 files changed, 28 insertions(+)

diff --git a/QMP/qmp-events.txt b/QMP/qmp-events.txt
index 92fe5fb..24d62df 100644
--- a/QMP/qmp-events.txt
+++ b/QMP/qmp-events.txt
@@ -154,6 +154,20 @@ Data:
             "path": "/machine/peripheral/virtio-net-pci-0" },
   "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
 
+MAC_TABLE_CHANGED
+-----------------
+
+Emitted mac-table configuration is changed by the guest.
+
+Data:
+
+- "name": net client name (json-string)
+
+{ "event": "MAC_TABLE_CHANGED",
+  "data": { "name": "vnet0" },
+  "timestamp": { "seconds": 1368697518, "microseconds": 326866 }}
+}
+
 DEVICE_TRAY_MOVED
 -----------------
 
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index bed0822..a9b8f53 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -21,6 +21,8 @@
 #include "hw/virtio/virtio-net.h"
 #include "net/vhost_net.h"
 #include "hw/virtio/virtio-bus.h"
+#include "qapi/qmp/qjson.h"
+#include "monitor/monitor.h"
 
 #define VIRTIO_NET_VM_VERSION    11
 
@@ -395,6 +397,7 @@ static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
 {
     uint8_t on;
     size_t s;
+    QObject *event_data;
 
     s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on));
     if (s != sizeof(on)) {
@@ -417,6 +420,10 @@ static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
         return VIRTIO_NET_ERR;
     }
 
+    event_data = qobject_from_jsonf("{ 'name': %s }", n->netclient_name);
+    monitor_protocol_event(QEVENT_MAC_TABLE_CHANGED, event_data);
+    qobject_decref(event_data);
+
     return VIRTIO_NET_OK;
 }
 
@@ -425,6 +432,7 @@ static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
 {
     struct virtio_net_ctrl_mac mac_data;
     size_t s;
+    QObject *event_data;
 
     if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) {
         if (iov_size(iov, iov_cnt) != sizeof(n->mac)) {
@@ -497,6 +505,10 @@ static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
         n->mac_table.multi_overflow = 1;
     }
 
+    event_data = qobject_from_jsonf("{ 'name': %s }", n->netclient_name);
+    monitor_protocol_event(QEVENT_MAC_TABLE_CHANGED, event_data);
+    qobject_decref(event_data);
+
     return VIRTIO_NET_OK;
 }
 
diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index 1a6cfcf..e88c70f 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -40,6 +40,7 @@ typedef enum MonitorEvent {
     QEVENT_BLOCK_JOB_ERROR,
     QEVENT_BLOCK_JOB_READY,
     QEVENT_DEVICE_DELETED,
+    QEVENT_MAC_TABLE_CHANGED,
     QEVENT_DEVICE_TRAY_MOVED,
     QEVENT_SUSPEND,
     QEVENT_SUSPEND_DISK,
diff --git a/monitor.c b/monitor.c
index 62aaebe..9e51545 100644
--- a/monitor.c
+++ b/monitor.c
@@ -490,6 +490,7 @@ static const char *monitor_event_names[] = {
     [QEVENT_BLOCK_JOB_ERROR] = "BLOCK_JOB_ERROR",
     [QEVENT_BLOCK_JOB_READY] = "BLOCK_JOB_READY",
     [QEVENT_DEVICE_DELETED] = "DEVICE_DELETED",
+    [QEVENT_MAC_TABLE_CHANGED] = "MAC_TABLE_CHANGED",
     [QEVENT_DEVICE_TRAY_MOVED] = "DEVICE_TRAY_MOVED",
     [QEVENT_SUSPEND] = "SUSPEND",
     [QEVENT_SUSPEND_DISK] = "SUSPEND_DISK",
-- 
1.8.1.4