netdev - Re: [PATCHv2 bluetooth-next 06/10] ndisc: add addr_len parameter to ndisc_fill_addr

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Date:	Tue, 3 May 2016 20:17:24 +0200
From:	Stefan Schmidt <stefan@....samsung.com>
To:	Alexander Aring <aar@...gutronix.de>, linux-wpan@...r.kernel.org
Cc:	kernel@...gutronix.de, marcel@...tmann.org,
	jukka.rissanen@...ux.intel.com, hannes@...essinduktion.org,
	mcr@...delman.ca, werner@...esberger.net,
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
	"David S . Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: [PATCHv2 bluetooth-next 06/10] ndisc: add addr_len parameter to
 ndisc_fill_addr_option

Hello.

On 20/04/16 10:19, Alexander Aring wrote:
> This patch makes the address length as argument for the
> ndisc_fill_addr_option function. This is necessary to handle addresses
> which don't use dev->addr_len as address length.
>
> Cc: David S. Miller<davem@...emloft.net>
> Cc: Alexey Kuznetsov<kuznet@....inr.ac.ru>
> Cc: James Morris<jmorris@...ei.org>
> Cc: Hideaki YOSHIFUJI<yoshfuji@...ux-ipv6.org>
> Cc: Patrick McHardy<kaber@...sh.net>
> Signed-off-by: Alexander Aring<aar@...gutronix.de>
> ---
>   net/ipv6/ndisc.c | 15 ++++++++-------
>   1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
> index 4e91d5e..176c7c4 100644
> --- a/net/ipv6/ndisc.c
> +++ b/net/ipv6/ndisc.c
> @@ -150,11 +150,11 @@ struct neigh_table nd_tbl = {
>   };
>   EXPORT_SYMBOL_GPL(nd_tbl);
>   
> -static void ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data)
> +static void ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data,
> +				   int data_len)
>   {
>   	int pad   = ndisc_addr_option_pad(skb->dev->type);
> -	int data_len = skb->dev->addr_len;
> -	int space = ndisc_opt_addr_space(skb->dev, skb->dev->addr_len);
> +	int space = ndisc_opt_addr_space(skb->dev, data_len);
>   	u8 *opt = skb_put(skb, space);
>   
>   	opt[0] = type;
> @@ -528,7 +528,7 @@ void ndisc_send_na(struct net_device *dev, const struct in6_addr *daddr,
>   
>   	if (inc_opt)
>   		ndisc_fill_addr_option(skb, ND_OPT_TARGET_LL_ADDR,
> -				       dev->dev_addr);
> +				       dev->dev_addr, dev->addr_len);
>   
>   
>   	ndisc_send_skb(skb, daddr, src_addr);
> @@ -590,7 +590,7 @@ void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
>   
>   	if (inc_opt)
>   		ndisc_fill_addr_option(skb, ND_OPT_SOURCE_LL_ADDR,
> -				       dev->dev_addr);
> +				       dev->dev_addr, dev->addr_len);
>   
>   	ndisc_send_skb(skb, daddr, saddr);
>   }
> @@ -641,7 +641,7 @@ void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
>   
>   	if (send_sllao)
>   		ndisc_fill_addr_option(skb, ND_OPT_SOURCE_LL_ADDR,
> -				       dev->dev_addr);
> +				       dev->dev_addr, dev->addr_len);
>   
>   	ndisc_send_skb(skb, daddr, saddr);
>   }
> @@ -1597,7 +1597,8 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
>   	 */
>   
>   	if (ha)
> -		ndisc_fill_addr_option(buff, ND_OPT_TARGET_LL_ADDR, ha);
> +		ndisc_fill_addr_option(buff, ND_OPT_TARGET_LL_ADDR, ha,
> +				       dev->addr_len);
>   
>   	/*
>   	 *	build redirect option and copy skb over to the new packet.

Reviewed-by: Stefan Schmidt<stefan@....samsung.com>

regards
Stefan Schmidt