netdev - Re: [PATCH iproute2] htb: support 64bit rates

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Date:	Thu, 14 Nov 2013 16:12:00 +0800
From:	Yang Yingliang <yangyingliang@...wei.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Stephen Hemminger <stephen@...workplumber.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH iproute2] htb: support 64bit rates

On 2013/11/13 6:34, Eric Dumazet wrote:

[...]
> @@ -256,6 +270,7 @@ static int htb_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
>  	struct tc_htb_glob *gopt;
>  	double buffer,cbuffer;
>  	unsigned int linklayer;
> +	__u64 rate64, ceil64;
>  	SPRINT_BUF(b1);
>  	SPRINT_BUF(b2);
>  	SPRINT_BUF(b3);
> @@ -275,12 +290,25 @@ static int htb_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
>  			if (show_details)
>  				fprintf(f, "quantum %d ", (int)hopt->quantum);
>  		}
> -		fprintf(f, "rate %s ", sprint_rate(hopt->rate.rate, b1));
> +
> +		rate64 = hopt->rate.rate;
> +		if (tb[TCA_HTB_RATE64] &&
> +		    RTA_PAYLOAD(tb[TCA_HTB_RATE64]) >= sizeof(rate64)) {
> +			rate64 = rta_getattr_u64(tb[TCA_HTB_RATE64]);
> +		}
> +

If RTA_PAYLOAD(tb[TCA_HTB_RATE64]) < sizeof(rate64),
it means something wrong, it don't need to continue,
"return -1" would be better.

Regards,
Yang

> +		ceil64 = hopt->ceil.rate;
> +		if (tb[TCA_HTB_CEIL64] &&
> +		    RTA_PAYLOAD(tb[TCA_HTB_CEIL64]) >= sizeof(ceil64))
> +			ceil64 = rta_getattr_u64(tb[TCA_HTB_CEIL64]);
> +
[...]
> 
> 
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