[07/10] netfilter: nf_conntrack_l4proto_udplite[4,6] cleanup

some cleanup for nf_conntrack_l4proto_udplite[4,6],
make codes more clearer and ready for moving the
sysctl code to nf_conntrack_proto_*_sysctl.c to
reduce the ifdef pollution.

and use nf_proto_net.users to identify if it's the first time
we use the nf_proto_net. when it's the first time,we will
initialized it.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
---
 net/netfilter/nf_conntrack_proto_udplite.c |   42 +++++++++++++++++----------
 1 files changed, 26 insertions(+), 16 deletions(-)

On Thu, Jun 14, 2012 at 06:07:22PM +0800, Gao feng wrote:
> some cleanup for nf_conntrack_l4proto_udplite[4,6],
> make codes more clearer and ready for moving the
> sysctl code to nf_conntrack_proto_*_sysctl.c to
> reduce the ifdef pollution.
> 
> and use nf_proto_net.users to identify if it's the first time
> we use the nf_proto_net. when it's the first time,we will
> initialized it.
> 
> Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
> ---
>  net/netfilter/nf_conntrack_proto_udplite.c |   42 +++++++++++++++++----------
>  1 files changed, 26 insertions(+), 16 deletions(-)
> 
> diff --git a/net/netfilter/nf_conntrack_proto_udplite.c b/net/netfilter/nf_conntrack_proto_udplite.c
> index d33e511..f6a789a 100644
> --- a/net/netfilter/nf_conntrack_proto_udplite.c
> +++ b/net/netfilter/nf_conntrack_proto_udplite.c
> @@ -234,29 +234,39 @@ static struct ctl_table udplite_sysctl_table[] = {
>  };
>  #endif /* CONFIG_SYSCTL */
>  
> +static int udplite_kmemdup_sysctl_table(struct nf_proto_net *pn)
> +{
> +#ifdef CONFIG_SYSCTL
> +	struct udplite_net *un = (struct udplite_net *)pn;
> +
> +	if (pn->ctl_table)
> +		return 0;
> +
> +	pn->ctl_table = kmemdup(udplite_sysctl_table,
> +				sizeof(udplite_sysctl_table),
> +				GFP_KERNEL);
> +	if (!pn->ctl_table)
> +		return -ENOMEM;
> +
> +	pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
> +	pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
> +#endif
> +	return 0;
> +}
> +
> +

Remove extra line.

>  static int udplite_init_net(struct net *net, u_int16_t proto)
>  {
> -	int i;
>  	struct udplite_net *un = udplite_pernet(net);
>  	struct nf_proto_net *pn = (struct nf_proto_net *)un;
> -#ifdef CONFIG_SYSCTL
> -	if (!pn->ctl_table) {
> -#else
> -	if (!pn->users++) {
> -#endif
> +
> +	if (!pn->users) {
> +		int i;
>  		for (i = 0 ; i < UDPLITE_CT_MAX; i++)
>  			un->timeouts[i] = udplite_timeouts[i];
> -#ifdef CONFIG_SYSCTL
> -		pn->ctl_table = kmemdup(udplite_sysctl_table,
> -					sizeof(udplite_sysctl_table),
> -					GFP_KERNEL);
> -		if (!pn->ctl_table)
> -			return -ENOMEM;
> -		pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
> -		pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
> -#endif
>  	}
> -	return 0;
> +
> +	return udplite_kmemdup_sysctl_table(pn);
>  }
>  
>  static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
> -- 
> 1.7.7.6
> 
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