Subject: Re: [PATCH 03/10] netfilter: add nf_ct_kfree_compat_sysctl_table to make codes clear

From: Gao feng <[email-masked]>
Date: Fri, 15 Jun 2012 09:36:06 +0800

Hi Pablo:

于 2012年06月15日 02:06, Pablo Neira Ayuso 写道:
> On Thu, Jun 14, 2012 at 06:07:18PM +0800, Gao feng wrote:
>> add function nf_ct_kfree_compat_sysctl_table to kfree l4proto's
>> compat sysctl table and set the sysctl table point to NULL.
>>
>> Signed-off-by: Gao feng <[email-masked]>
>> ---
>>  include/net/netfilter/nf_conntrack_l4proto.h |    8 ++++++++
>>  net/netfilter/nf_conntrack_proto.c           |    4 +---
>>  2 files changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h
>> index 5dd60f2..889b717 100644
>> --- a/include/net/netfilter/nf_conntrack_l4proto.h
>> +++ b/include/net/netfilter/nf_conntrack_l4proto.h
>> @@ -132,6 +132,14 @@ extern int nf_ct_port_nlattr_to_tuple(struct nlattr *tb[],
>>  extern int nf_ct_port_nlattr_tuple_size(void);
>>  extern const struct nla_policy nf_ct_port_nla_policy[];
>>  
>> +static inline void nf_ct_kfree_compat_sysctl_table(struct nf_proto_net *pn)
>> +{
>> +#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
>> +	kfree(pn->ctl_compat_table);
>> +	pn->ctl_compat_table = NULL;
>> +#endif
>> +}
>> +
>>  #ifdef CONFIG_SYSCTL
>>  #ifdef DEBUG_INVALID_PACKETS
>>  #define LOG_INVALID(net, proto)				\
>> diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c
>> index 8fc0332..c9df1b4 100644
>> --- a/net/netfilter/nf_conntrack_proto.c
>> +++ b/net/netfilter/nf_conntrack_proto.c
>> @@ -361,9 +361,7 @@ int nf_ct_l4proto_register_sysctl(struct net *net,
>>  					    NULL);
>>  		if (err == 0)
>>  			goto out;
>> -
>> -		kfree(pn->ctl_compat_table);
>> -		pn->ctl_compat_table = NULL;
>> +		nf_ct_kfree_compat_sysctl_table(pn);
> 
> if this is the only client of this function, then make it static and
> define it inside nf_conntrack_proto.c
> 

tcp_init_net,udp_init_net use this function too.

Thanks
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