Re: [Qemu-devel] [PATCH] QMP: Introduce WATCHDOG event

[Anthony Liguori]

On 02/25/2010 09:13 AM, Luiz Capitulino wrote:
> It's emitted whenever the watchdog device's timer expires. The action
> taken is provided in the 'data' member.
>
> Signed-off-by: Luiz Capitulino<address@hidden>
>    

Applied.  Thanks.

Regards,

Anthony Liguori
>    
---
>   QMP/qmp-events.txt |   19 +++++++++++++++++++
>   hw/watchdog.c      |   17 +++++++++++++++++
>   monitor.c          |    3 +++
>   monitor.h          |    1 +
>   4 files changed, 40 insertions(+), 0 deletions(-)
>
> diff --git a/QMP/qmp-events.txt b/QMP/qmp-events.txt
> index 72920f6..a94e9b4 100644
> --- a/QMP/qmp-events.txt
> +++ b/QMP/qmp-events.txt
> @@ -169,3 +169,22 @@ Example:
>           "client": { "family": "ipv4", "service": "46089",
>                       "host": "127.0.0.1", "sasl_username": "luiz" } },
>           "timestamp": { "seconds": 1263475302, "microseconds": 150772 } }
> +
> +WATCHDOG
> +--------
> +
> +Emitted when the watchdog device's timer is expired.
> +
> +Data:
> +
> +- "action": Action that has been taken, it's one of the following 
> (json-string):
> +            "reset", "shutdown", "poweroff", "pause", "debug", or "none"
> +
> +Example:
> +
> +{ "event": "WATCHDOG",
> +     "data": { "action": "reset" },
> +     "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
> +
> +Note: If action is "reset", "shutdown", or "pause" the WATCHDOG event is
> +followed respectively by the RESET, SHUTDOWN, or STOP events.
> diff --git a/hw/watchdog.c b/hw/watchdog.c
> index 6a3d1b4..aebb08a 100644
> --- a/hw/watchdog.c
> +++ b/hw/watchdog.c
> @@ -23,6 +23,8 @@
>   #include "qemu-option.h"
>   #include "qemu-config.h"
>   #include "qemu-queue.h"
> +#include "qemu-objects.h"
> +#include "monitor.h"
>   #include "sysemu.h"
>   #include "hw/watchdog.h"
>
> @@ -98,6 +100,15 @@ int select_watchdog_action(const char *p)
>       return 0;
>   }
>
> +static void watchdog_mon_event(const char *action)
> +{
> +    QObject *data;
> +
> +    data = qobject_from_jsonf("{ 'action': %s }", action);
> +    monitor_protocol_event(QEVENT_WATCHDOG, data);
> +    qobject_decref(data);
> +}
> +
>   /* This actually performs the "action" once a watchdog has expired,
>    * ie. reboot, shutdown, exit, etc.
>    */
> @@ -105,26 +116,32 @@ void watchdog_perform_action(void)
>   {
>       switch(watchdog_action) {
>       case WDT_RESET:             /* same as 'system_reset' in monitor */
> +        watchdog_mon_event("reset");
>           qemu_system_reset_request();
>           break;
>
>       case WDT_SHUTDOWN:          /* same as 'system_powerdown' in monitor */
> +        watchdog_mon_event("shutdown");
>           qemu_system_powerdown_request();
>           break;
>
>       case WDT_POWEROFF:          /* same as 'quit' command in monitor */
> +        watchdog_mon_event("poweroff");
>           exit(0);
>           break;
>
>       case WDT_PAUSE:             /* same as 'stop' command in monitor */
> +        watchdog_mon_event("pause");
>           vm_stop(0);
>           break;
>
>       case WDT_DEBUG:
> +        watchdog_mon_event("debug");
>           fprintf(stderr, "watchdog: timer fired\n");
>           break;
>
>       case WDT_NONE:
> +        watchdog_mon_event("none");
>           break;
>       }
>   }
> diff --git a/monitor.c b/monitor.c
> index 20512da..4704b18 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -426,6 +426,9 @@ void monitor_protocol_event(MonitorEvent event, QObject 
> *data)
>           case QEVENT_RTC_CHANGE:
>               event_name = "RTC_CHANGE";
>               break;
> +        case QEVENT_WATCHDOG:
> +            event_name = "WATCHDOG";
> +            break;
>           default:
>               abort();
>               break;
> diff --git a/monitor.h b/monitor.h
> index aa51bd5..e5f2d2b 100644
> --- a/monitor.h
> +++ b/monitor.h
> @@ -24,6 +24,7 @@ typedef enum MonitorEvent {
>       QEVENT_VNC_DISCONNECTED,
>       QEVENT_BLOCK_IO_ERROR,
>       QEVENT_RTC_CHANGE,
> +    QEVENT_WATCHDOG,
>       QEVENT_MAX,
>   } MonitorEvent;
>
>