qemu: lifecycle: make agent-mode shutdown and reboot timeout

When we shutdown/reboot a guest using agent-mode, if the guest itself blocks infinitely,
libvirt would block in qemuAgentShutdown() forever.
Thus, we set a timeout for shutdown/reboot, from our experience, 60 seconds would be fine.
Signed-off-by: NZhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: NWang Yufei <james.wangyufei@huawei.com>

include/libvirt/libvirt-qemu.h

@@ -49,6 +49,7 @@ typedef enum {
     VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK = -2,
     VIR_DOMAIN_QEMU_AGENT_COMMAND_DEFAULT = -1,
     VIR_DOMAIN_QEMU_AGENT_COMMAND_NOWAIT = 0,
+    VIR_DOMAIN_QEMU_AGENT_COMMAND_SHUTDOWN = 60,
 } virDomainQemuAgentCommandTimeoutValues;
 
 char *virDomainQemuAgentCommand(virDomainPtr domain, const char *cmd,

src/qemu/qemu_agent.c

@@ -1300,7 +1300,7 @@ int qemuAgentShutdown(qemuAgentPtr mon,
     else
         mon->await_event = QEMU_AGENT_EVENT_SHUTDOWN;
     ret = qemuAgentCommand(mon, cmd, &reply, false,
-                           VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK);
+                           VIR_DOMAIN_QEMU_AGENT_COMMAND_SHUTDOWN);
 
     virJSONValueFree(cmd);
     virJSONValueFree(reply);