netdev - Re: [PATCH v2 iproute2-next 04/11] devlink: Add helper functions for name and value separately

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Date:   Fri, 22 Feb 2019 10:01:25 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     Aya Levin <ayal@...lanox.com>, David Ahern <dsahern@...il.com>,
        netdev@...r.kernel.org, Jiri Pirko <jiri@...lanox.com>,
        Moshe Shemesh <moshe@...lanox.com>,
        Eran Ben Elisha <eranbe@...lanox.com>
Subject: Re: [PATCH v2 iproute2-next 04/11] devlink: Add helper functions
 for name and value separately

On Fri, 22 Feb 2019 09:58:32 +0100
Jiri Pirko <jiri@...nulli.us> wrote:

> Thu, Feb 21, 2019 at 07:02:11PM CET, stephen@...workplumber.org wrote:
> >On Thu, 21 Feb 2019 15:42:40 +0200
> >Aya Levin <ayal@...lanox.com> wrote:
> >  
> >> Add a new helper functions which outputs only values (without name
> >> label) for different types: boolean, uint, uint64, string and binary.
> >> In addition add a helper function which prints only the name label.
> >> 
> >> Signed-off-by: Aya Levin <ayal@...lanox.com>
> >> Reviewed-by: Moshe Shemesh <moshe@...lanox.com>
> >> ---
> >>  devlink/devlink.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> >>  1 file changed, 65 insertions(+), 1 deletion(-)
> >> 
> >> diff --git a/devlink/devlink.c b/devlink/devlink.c
> >> index b073ae020d52..5d69c4f24f29 100644
> >> --- a/devlink/devlink.c
> >> +++ b/devlink/devlink.c
> >> @@ -1588,7 +1588,6 @@ static void pr_out_port_handle_end(struct dl *dl)
> >>  		pr_out("\n");
> >>  }
> >>  
> >> -
> >>  static void pr_out_str(struct dl *dl, const char *name, const char *val)
> >>  {
> >>  	if (dl->json_output) {
> >> @@ -1636,6 +1635,71 @@ static void pr_out_u64(struct dl *dl, const char *name, uint64_t val)
> >>  	}
> >>  }
> >>  
> >> +static void pr_out_bool_value(struct dl *dl, bool value)
> >> +{
> >> +	if (dl->json_output)
> >> +		jsonw_bool(dl->jw, value);
> >> +	else
> >> +		pr_out(" %s", value ? "true" : "false");
> >> +}
> >> +
> >> +static void pr_out_uint_value(struct dl *dl, unsigned int value)
> >> +{
> >> +	if (dl->json_output)
> >> +		jsonw_uint(dl->jw, value);
> >> +	else
> >> +		pr_out(" %u", value);
> >> +}
> >> +
> >> +static void pr_out_uint64_value(struct dl *dl, uint64_t value)
> >> +{
> >> +	if (dl->json_output)
> >> +		jsonw_u64(dl->jw, value);
> >> +	else
> >> +		pr_out(" %lu", value);
> >> +}
> >> +
> >> +static void pr_out_binary_value(struct dl *dl, uint8_t *data, uint32_t len)
> >> +{
> >> +	int i = 1;
> >> +
> >> +	if (dl->json_output)
> >> +		jsonw_start_array(dl->jw);
> >> +	else
> >> +		pr_out("\n");
> >> +
> >> +	while (i < len) {
> >> +		if (dl->json_output) {
> >> +			jsonw_printf(dl->jw, "%d", data[i]);
> >> +		} else {
> >> +			pr_out(" %02x", data[i]);
> >> +			if (!(i % 16))
> >> +				pr_out("\n");
> >> +		}
> >> +		i++;
> >> +	}
> >> +	if (dl->json_output)
> >> +		jsonw_end_array(dl->jw);
> >> +	else if ((i - 1) % 16)
> >> +		pr_out("\n");
> >> +}
> >> +
> >> +static void pr_out_str_value(struct dl *dl, const char *value)
> >> +{
> >> +	if (dl->json_output)
> >> +		jsonw_string(dl->jw, value);
> >> +	else
> >> +		pr_out(" %s", value);
> >> +}
> >> +
> >> +static void pr_out_name(struct dl *dl, const char *name)
> >> +{
> >> +	if (dl->json_output)
> >> +		jsonw_name(dl->jw, name);
> >> +	else
> >> +		pr_out(" %s:", name);
> >> +}
> >> +
> >>  static void pr_out_region_chunk_start(struct dl *dl, uint64_t addr)
> >>  {
> >>  	if (dl->json_output) {  
> >
> >NAK
> >
> >Please convert devlink to use existing iproute2 json_print infrasructure
> >rather than reinventing it.  
> 
> That requires whole devlink/devlink.c code change. Could this be done as
> a follow-up?

There is a tradeoff, if more code creeps in it is harder to do the code change.
Can you commit to a timeframe to convert the JSON support code?