[PATCH] qemu_process: add tray changed event to queue in refresh disks

[Kristina Hanicova]

There are some cases when the internal state of disks can change
without qemu sending events about it (e.g. a disk can close
during reset). In case this happens, we should emit an event
about the modified disk.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1824722#c20

Signed-off-by: Kristina Hanicova <khanicov at redhat.com>
---
 src/qemu/qemu_process.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 5de55435d2..601e9694b6 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -8675,6 +8675,7 @@ qemuProcessRefreshDisks(virDomainObj *vm,
     qemuDomainObjPrivate *priv = vm->privateData;
     g_autoptr(GHashTable) table = NULL;
     size_t i;
+    virQEMUDriver *driver = QEMU_DOMAIN_PRIVATE(vm)->driver;
 
     if (qemuDomainObjEnterMonitorAsync(vm, asyncJob) == 0) {
         table = qemuMonitorGetBlockInfo(priv->mon);
@@ -8697,14 +8698,26 @@ qemuProcessRefreshDisks(virDomainObj *vm,
             continue;
 
         if (info->removable) {
+            virObjectEvent *event = NULL;
+            int reason;
+
             if (info->empty)
                 virDomainDiskEmptySource(disk);
 
             if (info->tray) {
-                if (info->tray_open)
+                if (info->tray_open == disk->tray_status)
+                    continue;
+
+                if (info->tray_open) {
+                    reason = VIR_DOMAIN_EVENT_TRAY_CHANGE_OPEN;
                     disk->tray_status = VIR_DOMAIN_DISK_TRAY_OPEN;
-                else
+                } else {
+                    reason = VIR_DOMAIN_EVENT_TRAY_CHANGE_CLOSE;
                     disk->tray_status = VIR_DOMAIN_DISK_TRAY_CLOSED;
+                }
+
+                event = virDomainEventTrayChangeNewFromObj(vm, disk->info.alias, reason);
+                virObjectEventStateQueue(driver->domainEventState, event);
             }
         }
 
-- 
2.38.1