Re: [PATCH 2/2] netfilter: conntrack: optional reliable conntrack event delivery

[Patrick McHardy <kaber@trash.net>]

Pablo Neira Ayuso wrote:
> Hi Patrick,
> 
> A couple of minor issues related to this patch.
> 
> Patrick McHardy wrote:
>>> +    hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode);
>> Why is _rcu used? The lists are never used for a lookup.
> 
> There's no hlist_nulls_del() operation without rcu. I have a patch here
> to add hlist_nulls_add_head() and hlist_nulls_del() although I guess
> that you are going to tell me that you cannot apply that patch? So,
> where to go?

Either way is fine I guess. Adding non _rcu function makes sense
I think (Eric CCed to correct me :)). But there's also no harm
in using the RCU functions as long as you add a comment stating
that you don't in fact rely on the RCU properties to avoid confusing
people.