[Qemu-devel] [PATCH] qmp: report TRAY_STATE_CHANGED events

[Paolo Bonzini <pbonzini@redhat.com>]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 QMP/qmp-events.txt |   20 ++++++++++++++++++++
 block.c            |    9 +++++++++
 monitor.c          |    3 +++
 monitor.h          |    1 +
 4 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/QMP/qmp-events.txt b/QMP/qmp-events.txt
index 0ce5d4e..242c7a5 100644
--- a/QMP/qmp-events.txt
+++ b/QMP/qmp-events.txt
@@ -264,3 +264,23 @@ Example:
 
 Note: If action is "reset", "shutdown", or "pause" the WATCHDOG event is
 followed respectively by the RESET, SHUTDOWN, or STOP events.
+
+
+TRAY_STATE_CHANGED
+------------------
+
+Emitted when the state of a CD-ROM tray changes.
+
+Data:
+
+- "device": device name (json-string)
+- "state": state of the tray, one of the following (json-string)
+   "open": tray is open
+   "closed": tray is closed
+
+Example:
+
+{ "event": "TRAY_STATE_CHANGED",
+    "data": { "device": "ide0-cd0",
+              "state": "open" },
+    "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
diff --git a/block.c b/block.c
index 9873b57..7b0aa62 100644
--- a/block.c
+++ b/block.c
@@ -2968,10 +2968,19 @@ int bdrv_media_changed(BlockDriverState *bs)
 void bdrv_eject(BlockDriverState *bs, int eject_flag)
 {
     BlockDriver *drv = bs->drv;
+    QObject *data;
 
     if (drv && drv->bdrv_eject) {
         drv->bdrv_eject(bs, eject_flag);
     }
+
+    if (*bs->device_name) {
+        data = qobject_from_jsonf("{ 'device': %s, 'state': %s }",
+                                  bs->device_name,
+                                  eject_flag ? "open" : "closed");
+        monitor_protocol_event(QEVENT_TRAY_STATE_CHANGED, data);
+        qobject_decref(data);
+    }
 }
 
 /**
diff --git a/monitor.c b/monitor.c
index ffda0fe..516a789 100644
--- a/monitor.c
+++ b/monitor.c
@@ -482,6 +482,9 @@ void monitor_protocol_event(MonitorEvent event, QObject *data)
         case QEVENT_SPICE_DISCONNECTED:
             event_name = "SPICE_DISCONNECTED";
             break;
+        case QEVENT_TRAY_STATE_CHANGED:
+            event_name = "TRAY_STATE_CHANGED";
+            break;
         default:
             abort();
             break;
diff --git a/monitor.h b/monitor.h
index 4f2d328..b8f4bf7 100644
--- a/monitor.h
+++ b/monitor.h
@@ -35,6 +35,7 @@ typedef enum MonitorEvent {
     QEVENT_SPICE_CONNECTED,
     QEVENT_SPICE_INITIALIZED,
     QEVENT_SPICE_DISCONNECTED,
+    QEVENT_TRAY_STATE_CHANGED,
     QEVENT_MAX,
 } MonitorEvent;
 
-- 
1.7.6.4