netdev - Re: [PATCHv2 bluetooth-next 04/10] ndisc: add addr_len parameter to ndisc_opt_addr

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Date:	Tue, 3 May 2016 20:17:03 +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 04/10] ndisc: add addr_len parameter to
 ndisc_opt_addr_space

Hello.

On 20/04/16 10:19, Alexander Aring wrote:
> This patch makes the address length as argument for the
> ndisc_opt_addr_space 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>
> ---
>   include/net/ndisc.h |  8 ++++----
>   net/ipv6/ndisc.c    | 10 +++++-----
>   2 files changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/include/net/ndisc.h b/include/net/ndisc.h
> index 2d8edaa..ef43e88 100644
> --- a/include/net/ndisc.h
> +++ b/include/net/ndisc.h
> @@ -127,10 +127,10 @@ static inline int ndisc_addr_option_pad(unsigned short type)
>   	}
>   }
>   
> -static inline int ndisc_opt_addr_space(struct net_device *dev)
> +static inline int ndisc_opt_addr_space(struct net_device *dev,
> +				       unsigned char addr_len)
>   {
> -	return NDISC_OPT_SPACE(dev->addr_len +
> -			       ndisc_addr_option_pad(dev->type));
> +	return NDISC_OPT_SPACE(addr_len + ndisc_addr_option_pad(dev->type));
>   }
>   
>   static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
> @@ -139,7 +139,7 @@ static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
>   	u8 *lladdr = (u8 *)(p + 1);
>   	int lladdrlen = p->nd_opt_len << 3;
>   	int prepad = ndisc_addr_option_pad(dev->type);
> -	if (lladdrlen != ndisc_opt_addr_space(dev))
> +	if (lladdrlen != ndisc_opt_addr_space(dev, dev->addr_len))
>   		return NULL;
>   	return lladdr + prepad;
>   }
> diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
> index c245895..69e20e3 100644
> --- a/net/ipv6/ndisc.c
> +++ b/net/ipv6/ndisc.c
> @@ -154,7 +154,7 @@ static void ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data)
>   {
>   	int pad   = ndisc_addr_option_pad(skb->dev->type);
>   	int data_len = skb->dev->addr_len;
> -	int space = ndisc_opt_addr_space(skb->dev);
> +	int space = ndisc_opt_addr_space(skb->dev, skb->dev->addr_len);
>   	u8 *opt = skb_put(skb, space);
>   
>   	opt[0] = type;
> @@ -509,7 +509,7 @@ void ndisc_send_na(struct net_device *dev, const struct in6_addr *daddr,
>   	if (!dev->addr_len)
>   		inc_opt = 0;
>   	if (inc_opt)
> -		optlen += ndisc_opt_addr_space(dev);
> +		optlen += ndisc_opt_addr_space(dev, dev->addr_len);
>   
>   	skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen);
>   	if (!skb)
> @@ -574,7 +574,7 @@ void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
>   	if (ipv6_addr_any(saddr))
>   		inc_opt = false;
>   	if (inc_opt)
> -		optlen += ndisc_opt_addr_space(dev);
> +		optlen += ndisc_opt_addr_space(dev, dev->addr_len);
>   
>   	skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen);
>   	if (!skb)
> @@ -626,7 +626,7 @@ void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
>   	}
>   #endif
>   	if (send_sllao)
> -		optlen += ndisc_opt_addr_space(dev);
> +		optlen += ndisc_opt_addr_space(dev, dev->addr_len);
>   
>   	skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen);
>   	if (!skb)
> @@ -1563,7 +1563,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
>   			memcpy(ha_buf, neigh->ha, dev->addr_len);
>   			read_unlock_bh(&neigh->lock);
>   			ha = ha_buf;
> -			optlen += ndisc_opt_addr_space(dev);
> +			optlen += ndisc_opt_addr_space(dev, dev->addr_len);
>   		} else
>   			read_unlock_bh(&neigh->lock);
>   

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

regards
Stefan Schmidt