Re: [RFC ndctl PATCH 3/3] ndctl, rename monitor.conf to ndctl.conf

["Verma, Vishal L" <vishal.l.verma@intel.com>]

On Mon, 2021-05-17 at 08:14 +0900, QI Fuli wrote:
> From: QI Fuli <qi.fuli@fujitsu.com>
> 
> Rename monitor.conf to ndctl.conf, and make it a ndclt global
> configuration file that all commands can refer to.
> Refactor monitor to make it work with ndctl.conf.
> 
> Signed-off-by: QI Fuli <qi.fuli@fujitsu.com>
> ---
>  configure.ac                       |   8 +-
>  ndctl/Makefile.am                  |   9 +-
>  ndctl/monitor.c                    | 127 +++++------------------------
>  ndctl/{monitor.conf => ndctl.conf} |  16 +++-
>  4 files changed, 40 insertions(+), 120 deletions(-)
>  rename ndctl/{monitor.conf => ndctl.conf} (82%)
> 

[snip]

> @@ -601,6 +496,19 @@ int cmd_monitor(int argc, const char **argv, struct ndctl_ctx *ctx)
>  		"ndctl monitor [<options>]",
>  		NULL
>  	};
> +	const struct config configs[] = {
> +		CONF_STR("core:bus", &param.bus, NULL),
> +		CONF_STR("core:region", &param.region, NULL),
> +		CONF_STR("core:dimm", &param.dimm, NULL),
> +		CONF_STR("core:namespace", &param.namespace, NULL),
> +		CONF_STR("monitor:bus", &param.bus, NULL),
> +		CONF_STR("monitor:region", &param.region, NULL),
> +		CONF_STR("monitor:dimm", &param.dimm, NULL),
> +		CONF_STR("monitor:namespace", &param.namespace, NULL),
> +		CONF_STR("monitor:dimm-event", &monitor.dimm_event, NULL),
> +		//CONF_FILE("monitor:log", &monitor.log, NULL),
> +		CONF_END(),
> +	};
>  	const char *prefix = "./";
>  	struct util_filter_ctx fctx = { 0 };
>  	struct monitor_filter_arg mfa = { 0 };
> @@ -621,7 +529,10 @@ int cmd_monitor(int argc, const char **argv, struct ndctl_ctx *ctx)
>  	else
>  		monitor.ctx.log_priority = LOG_INFO;
>  
> -	rc = read_config_file(ctx, &monitor, &param);
> +	if (monitor.config_file)
> +		rc = parse_configs(monitor.config_file, configs);
> +	else
> +		rc = parse_configs(NDCTL_CONF_FILE, configs);
>  	if (rc)
>  		goto out;

If I'm reading this right, it looks like this is set up so that params
from the config file will override any params from the command line,
which I think can be surprising behavior. The command line should
always override anything in the config file.

I suspect we'll need to collect CLI params in a 'param_cli' structure,
config params in a 'param_config' structure, and then consolidate them
to create the final 'param' structure that gets passed to
util_filter_walk etc.