From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Dobriyan Subject: Re: [PATCH 17/33] netns ct: final init_net tweaks Date: Sat, 13 Sep 2008 14:45:15 +0400 Message-ID: <20080913104515.GA7440@x200.localdomain> References: <48C01046.2070704@trash.net> <1220842990-30500-17-git-send-email-adobriyan@gmail.com> <48C623CA.9060803@trash.net> <20080909073245.GA7307@x200.localdomain> <48C62B1C.7070104@trash.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, containers@lists.linux-foundation.org To: Patrick McHardy Return-path: Content-Disposition: inline In-Reply-To: <48C62B1C.7070104@trash.net> Sender: netfilter-devel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Tue, Sep 09, 2008 at 09:51:56AM +0200, Patrick McHardy wrote: > Alexey Dobriyan wrote: >> On Tue, Sep 09, 2008 at 09:20:42AM +0200, Patrick McHardy wrote: >>> Having multiple of these net_eq checks per function (14 total) is >>> not a very nice way to do this. >> >> Yep, I was just afraid of some subtle ordering rules and to keep >> potential init_net breakage to minimum. > > Me too, but I still prefer to do it properly once. > >>> How about splitting the code into a netns and a global part instead? >> >> Prebably they aren't strict at all. > > Not particulary. For cleanup a three stage approach with > > 1. init_net deactivation (ip_ct_attach = NULL) > 2. generic netns cleanup > 3. init_net specific final cleanup (slab cache, nf_conntrack_cachep, > accounting, helpers, protocols, ...) > > should work fine. > > The initialization should be OK with just a init_net part > and a generic netns part. Ugh, I'm still finding the least ugly way to put init_net checks, and it's better to do it at the very end. So, slight reordering. See per-netns statistics, nf_conntrack_count, nf_conntrack_checksum, nf_conntrack_log_invalid and accounting. The rest (SIP, H323, GRE, PPTP, per-netns NAT) remains the same and can be applied independently of init_net checks.