netdev - Re: iproute2/tc invalid JSON in 6.0.0 for flowid

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Date:   Thu, 13 Oct 2022 08:43:44 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Francois Romieu <romieu@...zoreil.com>
Cc:     Christian Pössinger <christian@...ssinger.com>,
        netdev@...r.kernel.org
Subject: Re: iproute2/tc invalid JSON in 6.0.0 for flowid

On Thu, 13 Oct 2022 17:18:13 +0200
Francois Romieu <romieu@...zoreil.com> wrote:

> Christian Pössinger <christian@...ssinger.com> :
> [...]
> > If you can point me to the location which could be responsible for this issue, I am happy to submit a fix to the net tree.  
> 
> If the completely untested patch below does not work, you may also
> dig the bits in include/json_print.h and lib/json_print.c 
> 
> (Ccing Stephen as the unidentified "both" in README.devel)
> 
> diff --git a/tc/f_u32.c b/tc/f_u32.c
> index d787eb91..70098bcd 100644
> --- a/tc/f_u32.c
> +++ b/tc/f_u32.c
> @@ -1275,11 +1275,11 @@ static int u32_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt,
>  		fprintf(stderr, "divisor and hash missing ");
>  	}
>  	if (tb[TCA_U32_CLASSID]) {
> +		char *fmt = !sel || !(sel->flags & TC_U32_TERMINAL) ? "*flowid %s" : "flowid %s";
>  		SPRINT_BUF(b1);
> -		fprintf(f, "%sflowid %s ",
> -			!sel || !(sel->flags & TC_U32_TERMINAL) ? "*" : "",
> -			sprint_tc_classid(rta_getattr_u32(tb[TCA_U32_CLASSID]),
> -					  b1));
> +
> +		print_string(PRINT_ANY, "flowid", fmt,
> +			    sprint_tc_classid(rta_getattr_u32(tb[TCA_U32_CLASSID]), b1));
>  	} else if (sel && sel->flags & TC_U32_TERMINAL) {
>  		print_string(PRINT_FP, NULL, "terminal flowid ", NULL);
>  	}
> 


Already sent patch.