Re: [Qemu-devel] [PATCH 02/20] monitor: Clean up after previous commit

[Eric Blake]

On 05/22/2015 05:36 AM, Markus Armbruster wrote:
> Signed-off-by: Markus Armbruster <address@hidden>
> ---

Commit message is sparse; I would have mentioned [1] and [2].

>  monitor.c | 40 +++++++++++-----------------------------
>  1 file changed, 11 insertions(+), 29 deletions(-)
> 
>  
> -static void handler_audit(Monitor *mon, const mon_cmd_t *cmd, int ret)
> -{
> -    if (ret && !monitor_has_error(mon)) {
> -        /*
> -         * If it returns failure, it must have passed on error.
> -         *
> -         * Action: Report an internal error to the client if in QMP.
> -         */
> -        qerror_report(QERR_UNDEFINED_ERROR);
> -    }
> -}

[2] - handler_audit() goes away now that it has no caller

> -
>  static void handle_user_command(Monitor *mon, const char *cmdline)
>  {
>      QDict *qdict;
> @@ -5015,28 +5003,17 @@ static QDict *qmp_check_input_obj(QObject *input_obj)
>      return input_dict;
>  }
>  
> -static void qmp_call_cmd(Monitor *mon, const mon_cmd_t *cmd,
> -                         const QDict *params)
> -{
> -    int ret;
> -    QObject *data = NULL;
> -
> -    ret = cmd->mhandler.cmd_new(mon, params, &data);
> -    handler_audit(mon, cmd, ret);
> -    monitor_protocol_emitter(mon, data);
> -    qobject_decref(data);
> -}

[1] - qmp_call_cmd() is inlined and simplified...

> -
>  static void handle_qmp_command(JSONMessageParser *parser, QList *tokens)
>  {
>      int err;
> -    QObject *obj;
> +    QObject *obj, *data;
>      QDict *input, *args;
>      const mon_cmd_t *cmd;
>      const char *cmd_name;
>      Monitor *mon = cur_mon;
>  
>      args = input = NULL;
> +    data = NULL;
>  
>      obj = json_parser_parse(tokens, NULL);
>      if (!obj) {
> @@ -5079,12 +5056,17 @@ static void handle_qmp_command(JSONMessageParser 
> *parser, QList *tokens)
>          goto err_out;
>      }
>  
> -    qmp_call_cmd(mon, cmd, args);
> -    goto out;
> +    if (cmd->mhandler.cmd_new(mon, args, &data)) {
> +        /* Command failed... */
> +        if (!monitor_has_error(mon)) {
> +            /* ... without setting an error, so make one up */
> +            qerror_report(QERR_UNDEFINED_ERROR);
> +        }
> +    }

...into its lone caller.

>  
>  err_out:
> -    monitor_protocol_emitter(mon, NULL);
> -out:
> +    monitor_protocol_emitter(mon, data);
> +    qobject_decref(data);
>      QDECREF(input);
>      QDECREF(args);
>  }
> 

But the code cleanup itself looks sane, so with the improved commit message:

Reviewed-by: Eric Blake <address@hidden>

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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