netdev - Re: [PATCH iproute2 2/2] ip: remove NLM_F

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Message-ID: <20121025090628.25e484d1@nehalam.linuxnetplumber.net>
Date:	Thu, 25 Oct 2012 09:06:28 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc:	netdev@...r.kernel.org, joe@...ches.com, bernat@...fy.cx,
	eric.dumazet@...il.com, yoshfuji@...ux-ipv6.org,
	davem@...emloft.net
Subject: Re: [PATCH iproute2 2/2] ip: remove NLM_F_EXCL in case of ECMPv6
 routes

On Tue, 23 Oct 2012 14:42:56 +0200
Nicolas Dichtel <nicolas.dichtel@...nd.com> wrote:

> ECMPv6 routes are added each one after the other by the kernel, so we should
> avoid to set the flag NLM_F_EXCL.
> 
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> ---
>  ip/iproute.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/ip/iproute.c b/ip/iproute.c
> index c60156f..799a70e 100644
> --- a/ip/iproute.c
> +++ b/ip/iproute.c
> @@ -694,8 +694,11 @@ int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv)
>  		rtnh = RTNH_NEXT(rtnh);
>  	}
>  
> -	if (rta->rta_len > RTA_LENGTH(0))
> +	if (rta->rta_len > RTA_LENGTH(0)) {
>  		addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
> +		if (r->rtm_family == AF_INET6)
> +			n->nlmsg_flags &= ~NLM_F_EXCL;
> +	}
>  	return 0;
>  }
>  

Shouldn't this be true for multipath IPv4 as well?
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