Re: [Qemu-devel] [PATCH v5 3/6] BitmapLog: get the information about the parameters

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Sanidhya Kashyap (sanidhya.iiith@gmail.com) wrote:
> No functional change except the variable name.
> 
> Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
> ---
>  hmp-commands.hx  |  2 ++
>  hmp.c            | 19 +++++++++++++++++++
>  hmp.h            |  1 +
>  monitor.c        |  7 +++++++
>  qapi-schema.json | 28 ++++++++++++++++++++++++++++
>  qmp-commands.hx  | 25 +++++++++++++++++++++++++
>  savevm.c         | 17 +++++++++++++++++
>  7 files changed, 99 insertions(+)
> 
> diff --git a/hmp-commands.hx b/hmp-commands.hx
> index 30b553e..dca65bc 100644
> --- a/hmp-commands.hx
> +++ b/hmp-commands.hx
> @@ -1780,6 +1780,8 @@ show qdev device model list
>  show roms
>  @item info tpm
>  show the TPM device
> +@item info log_dirty_bitmap
> +show the current parameters values
>  @end table
>  ETEXI
>  
> diff --git a/hmp.c b/hmp.c
> index d067420..0a8831b 100644
> --- a/hmp.c
> +++ b/hmp.c
> @@ -1732,3 +1732,22 @@ void hmp_info_memdev(Monitor *mon, const QDict *qdict)
>  
>      monitor_printf(mon, "\n");
>  }
> +
> +void hmp_info_log_dirty_bitmap(Monitor *mon, const QDict *qdict)
> +{
> +    Error *err = NULL;
> +    BitmapLogStateInfo *info = qmp_query_log_dirty_bitmap(&err);
> +
> +    if (info) {
> +        monitor_printf(mon, "current iteration: %ld\n",
> +                       info->current_iteration);
> +        monitor_printf(mon, "total iterations: %ld\n", info->iterations);
> +        monitor_printf(mon, "current period value: %ld\n", info->period);

I think you need to use the PRId64 macros there rather than %ld; because long
is not always 64bits (there are some other uses in hmp.c)

> +    }
> +
> +    if (err) {
> +        hmp_handle_error(mon, &err);
> +    }
> +
> +    qapi_free_BitmapLogStateInfo(info);
> +}
> diff --git a/hmp.h b/hmp.h
> index 0895182..02e8ee4 100644
> --- a/hmp.h
> +++ b/hmp.h
> @@ -38,6 +38,7 @@ void hmp_info_balloon(Monitor *mon, const QDict *qdict);
>  void hmp_info_pci(Monitor *mon, const QDict *qdict);
>  void hmp_info_block_jobs(Monitor *mon, const QDict *qdict);
>  void hmp_info_tpm(Monitor *mon, const QDict *qdict);
> +void hmp_info_log_dirty_bitmap(Monitor *mon, const QDict *qdict);
>  void hmp_quit(Monitor *mon, const QDict *qdict);
>  void hmp_stop(Monitor *mon, const QDict *qdict);
>  void hmp_system_reset(Monitor *mon, const QDict *qdict);
> diff --git a/monitor.c b/monitor.c
> index 5bc70a6..5f20f72 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -2918,6 +2918,13 @@ static mon_cmd_t info_cmds[] = {
>          .mhandler.cmd = hmp_info_memdev,
>      },
>      {
> +        .name       = "log_dirty_bitmap",
> +        .args_type  = "",
> +        .params     = "",
> +        .help       = "show the current parameters values",
> +        .mhandler.cmd = hmp_info_log_dirty_bitmap,
> +    },
> +    {
>          .name       = NULL,
>      },
>  };
> diff --git a/qapi-schema.json b/qapi-schema.json
> index dced3c2..6aac367 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -3515,3 +3515,31 @@
>    'data'    : { 'filename'      : 'str',
>                  '*iterations'   : 'int',
>                  '*period'       : 'int' } }
> +##
> +# @BitmapLogStateInfo
> +#
> +# Provides information for the bitmap logging process
> +#
> +# @current-iteration: stores current iteration value
> +#
> +# @iterations: total iterations value
> +#
> +# @period: the time difference in milliseconds between each iteration
> +#
> +# Since 2.2
> +##
> +{ 'type': 'BitmapLogStateInfo',
> +  'data': { 'current-iteration' : 'int',
> +            'iterations'        : 'int',
> +            'period'            : 'int' } }
> +
> +##
> +# @query-log-dirty-bitmap
> +#
> +# Get the current values of the parameters involved in bitmap logging process
> +#
> +# This command returns the BitmapLogStateInfo
> +#
> +# Since 2.2
> +##
> +{ 'command': 'query-log-dirty-bitmap', 'returns': 'BitmapLogStateInfo' }
> diff --git a/qmp-commands.hx b/qmp-commands.hx
> index 2ead2ca..e79ed6a 100644
> --- a/qmp-commands.hx
> +++ b/qmp-commands.hx
> @@ -3789,3 +3789,28 @@ Examples:
>  Note: The iterations, and period parameters are optional. iterations default
>  value is 3 while that of period is 10.
>  EQMP
> +
> +    {
> +        .name       = "query-log-dirty-bitmap",
> +        .args_type  = "",
> +        .mhandler.cmd_new = qmp_marshal_input_query_log_dirty_bitmap,
> +    },
> +
> +SQMP
> +query-log-dirty-bitmap
> +----------------------
> +
> +Get the parameters information
> +
> +- "current-iteration": stores current iteration value
> +- "iterations": total iterations value
> +- "period": the time difference in milliseconds between each iteration
> +
> +Example:
> +
> +-> { "execute": "query-log-dirty-bitmap" }
> +<- { "return": {
> +            "current-iteration": 3
> +            "iterations": 10
> +            "period": 100 } }
> +EQMP
> diff --git a/savevm.c b/savevm.c
> index 125e5ed..22e84fe 100644
> --- a/savevm.c
> +++ b/savevm.c
> @@ -1515,6 +1515,23 @@ void qmp_log_dirty_bitmap(const char *filename, bool has_iterations,
>      return;
>  }
>  
> +BitmapLogStateInfo *qmp_query_log_dirty_bitmap(Error **errp)
> +{
> +    BitmapLogState *b = log_bitmap_get_current_state();
> +    BitmapLogStateInfo *info = NULL;
> +
> +    if (b->state != LOG_BITMAP_STATE_ACTIVE) {
> +        return info;
> +    }
> +
> +    info = g_malloc0(sizeof(BitmapLogStateInfo));
> +    info->current_iteration = b->current_iteration;
> +    info->iterations = b->iterations;
> +    info->period = b->current_period;
> +
> +    return info;
> +}
> +
>  void qmp_xen_save_devices_state(const char *filename, Error **errp)
>  {
>      QEMUFile *f;
> -- 
> 1.9.3
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK