Alexander Aring wrote:
> This patch removes the net_device parameter from ndisc_opt_addr_space
> function. This can be useful for calling such functionality which
> doesn't depends on dev parameter. For current existing functionality
> which depends on dev parameter, we introduce ndisc_dev_opt_addr_space to have
> an easy replacement for the ndisc_opt_addr_space function.
>
> Cc: David S. Miller <davem@xxxxxxxxxxxxx>
> Cc: Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx>
> Cc: James Morris <jmorris@xxxxxxxxx>
> Cc: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx>
> Cc: Patrick McHardy <kaber@xxxxxxxxx>
> Signed-off-by: Alexander Aring <aar@xxxxxxxxxxxxxx>
> ---
> include/net/ndisc.h | 13 +++++++++----
> net/ipv6/ndisc.c | 12 ++++++------
> 2 files changed, 15 insertions(+), 10 deletions(-)
>
> diff --git a/include/net/ndisc.h b/include/net/ndisc.h
> index 2d8edaa..dbc8d01 100644
> --- a/include/net/ndisc.h
> +++ b/include/net/ndisc.h
> @@ -127,10 +127,15 @@ 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(unsigned char addr_len, int pad)
> {
> - return NDISC_OPT_SPACE(dev->addr_len +
> - ndisc_addr_option_pad(dev->type));
> + return NDISC_OPT_SPACE(addr_len + pad);
> +}
> +
> +static inline int ndisc_dev_opt_addr_space(const struct net_device *dev)
> +{
> + return ndisc_opt_addr_space(dev->addr_len,
> + ndisc_addr_option_pad(dev->type));
> }
>
I prefer not to change existing functions such as ndisc_opt_addr_space(),
and name new function __ndisc_opt_addr_space() etc.
Plus, my original thought (when I implement these functions) was to
have per-net_device ndisc_opt_addr_spece(), ndisc_opt_adr_data() etc.
What do you think of that?
> static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
> @@ -139,7 +144,7 @@ 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->addr_len, prepad))
> return NULL;
> return lladdr + prepad;
> }
> diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
> index c245895..2241f06 100644
> --- a/net/ipv6/ndisc.c
> +++ b/net/ipv6/ndisc.c
> @@ -152,9 +152,9 @@ EXPORT_SYMBOL_GPL(nd_tbl);
>
> static void ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data)
> {
> - int pad = ndisc_addr_option_pad(skb->dev->type);
> + 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(data_len, pad);
> 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_dev_opt_addr_space(dev);
>
> 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_dev_opt_addr_space(dev);
>
> 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_dev_opt_addr_space(dev);
>
> 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_dev_opt_addr_space(dev);
> } else
> read_unlock_bh(&neigh->lock);
>
>
--
Hideaki Yoshifuji <hideaki.yoshifuji@xxxxxxxxxxxxxxxx>
Technical Division, MIRACLE LINUX CORPORATION
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